JP2008012512A - Water-ozone mixing device, water purifying device, ozone water generation device, gas-liquid mixer, and check valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water-ozone mixing device suppressing lowering of mixing efficiency of ozone with a simple constitution when mixing ozone with water; a water purifying device preferably improving water quality with a simple constitution when purifying water; or a safely operable water purifying device; an ozone water generation device efficiently producing ozone water with a simple constitution; a gas-liquid mixer surely preventing reverse flow of liquid to a gas supply side; or a check valve surely preventing the reverse flow. <P>SOLUTION: The water-ozone mixing device 2, water purifying device 1 or ozone water generation device 70 is provided with a drain pipe 35 for draining water leaking from an ozone mixer 7 when water leaks from the ozone mixer 7, and a drain valve 36 provided in the drain pipe 35 and preventing flow-in of air in the direction reverse to the water flow direction while supplying ozone to the ozone mixer 7. The water-ozone mixing device 2 is housed in the casing 27, and an arch valve 81 is used for the check valve 17. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water ozone mixing device for mixing ozone with water, a water purification device for purifying water, an ozone water generating device for generating ozone water, and a gas-liquid mixing for mixing gas with liquid And a check valve used in these devices.

  Conventionally, there is a demand to use water and rain water drawn from water sources such as wells and rivers as washing water and bath water, or to spray water for plant cultivation.

  However, recently, the quality of well water has been remarkably deteriorated due to changes in the strata itself and the penetration of pollutants into groundwater veins, and it has become difficult to use the well as it is pumped. Similarly, river water often deteriorates in water quality. The deterioration of water quality here means, for example, that the turbidity and chromaticity of water become high, or that an odor is generated from water.

  As such water quality deterioration, as described in Patent Document 1, for example, well water may be so-called “red water”. “Red water” is water in which the well water extracted from the well is changed to red as time passes because iron and manganese components are contained as ions. Therefore, “red water” is not suitable for use as washing water or bath water, and also has a problem of adversely affecting plant cultivation.

  In order to improve the quality of contaminated water such as well water and river water as described above, the iron treatment in the water is oxidized and removed by ozone treatment. A water-receiving type well improvement device that can sterilize bacteria, E. coli, viruses, and the like has been proposed (see, for example, Patent Document 1).

  In addition, there is a desire to use ozone water mixed with tap water to generate ozone water, which can be used, for example, for sterilization cleaning of limbs, sterilization / deodorization / slimming of toro boxes containing fresh fish, etc. There is also.

In order to generate ozone water as described above, an ozone water generation system having excellent sterilization / deodorization performance has been proposed by mixing tap water and ozone (see, for example, Patent Document 2).
Japanese Patent No. 2715244 JP 2003-305348 A

  The water quality improvement device described in Patent Document 1 is a device in which a large water receiving tank, a first stage treatment machine, and a second stage treatment machine are combined in a complex manner.

  By the way, in Indonesia, for example, there are areas where water supply infrastructure is not in place. In such areas, well water or river water containing red water pumped out by dredging, accumulated rainwater, etc. Is used for domestic use. Therefore, there is a high demand for introducing a water quality improvement device in such an area, and it is desirable that the configuration of the water quality improvement device be as simple as possible. However, a device having a large and complicated configuration like the water quality improvement device described above. Then, it is difficult to introduce.

  Moreover, in the said water quality improvement apparatus, the ozone generator is arrange | positioned below the ozone addition part.

  In general, the ozone generator has a configuration that generates ozone by taking in the surrounding air and discharging at a high voltage, so that the ozone generator cannot be discharged if it is exposed to water. There is. Moreover, when the power source of the ozone generator exposed to water is turned on, there is a risk of electric leakage or electric shock, and there is a problem in handling. For this reason, it is desirable to prevent water from entering the ozone generator. However, in the configuration in which the ozone generator is disposed below the ozone addition unit as in the water quality improvement device, the water in the ozone addition unit is used. However, due to its own weight, it may enter the ozone generator through the ozone introduction pipe.

  Therefore, in order to improve these problems, the ozone water generation system described in Patent Document 2 can be used universally regardless of the flow path conditions, and the ozone generator can be used in the water supply line. It is proposed to introduce the configuration of a system provided above an injector that is an inlet for mixing ozone into water flowing through the water quality improvement apparatus. However, even when this system configuration is introduced, if the water supply line is filled with water when the system power is turned off, minute water leaks from the check valve provided in the injector. In some cases, water may enter the ozone generator. Moreover, if the flow of water flowing in the water supply line is suddenly stopped, the so-called water hammer phenomenon occurs, the water pressure in the water supply line rises, and the water in the water supply line flows backward despite the presence of a check valve. May reach the ozone generator.

  The present invention has been made based on such a background, and it is a main object of the present invention to provide a water ozone mixing device capable of suppressing a decrease in ozone mixing efficiency with a simple configuration when ozone is mixed with water. To do.

  Another object of the present invention is to provide a water purification apparatus that can improve water quality satisfactorily with a simple configuration when purifying water.

  Another object of the present invention is to provide a water purification apparatus that can operate safely when purifying water.

  Another object of the present invention is to provide an ozone water generator that can efficiently generate ozone water with a simple configuration.

  Another object of the present invention is to provide a gas-liquid mixer that can reliably prevent the backflow of liquid to the gas supply side.

  Furthermore, another object of the present invention is to provide a check valve that can reliably prevent backflow.

  The invention according to claim 1 has a water inlet at one end, a water outlet at the other end, a water channel communicating the inlet and the outlet, a gas inlet at one end, and a gas outlet at the other end A gas-liquid mixer having a gas passage where the gas outlet merges in the middle of the water channel, and an ozone supply device that generates ozone and supplies the generated ozone from the gas inlet to the gas passage When the water in the water channel enters from the gas outlet and flows through the gas passage, a drain passage for draining water flowing out of the gas passage, and an ozone supply to the gas passage is provided in the drain passage. The water ozone mixing device is characterized by comprising air inflow suppressing means for suppressing air from flowing in the direction opposite to the direction in which water flows out of the drainage channel.

  The invention according to claim 2 is characterized in that the gas-liquid mixer has a constricted portion in which the middle of the water channel is constricted, and the gas outlet is joined to the constricted portion. It is a water ozone mixing apparatus of description.

  The invention according to claim 3 is the water ozone according to claim 2, wherein the air inflow suppression means is operated by a pressure change in the drainage channel that changes when ozone is sucked into the throttle portion. It is a mixing device.

  According to a fourth aspect of the present invention, the air inflow suppression means has an inlet at one end and an outlet at the other end, and the inlet and the outlet are connected to the drainage channel so that they are inserted in the middle of the drainage channel. And the storage chamber, which is accommodated in the storage chamber, has flexibility, and blocks the drainage channel by closing the inlet by the pressure change in the drainage channel that changes when ozone is sucked into the throttle portion. The blocking member is in contact with or close to the inner wall of the storage chamber except when water flows out of the drainage channel and when ozone is sucked into the throttle portion. When the water flows out of the drainage channel, the drainage channel is pressed by the flowing water and the blocking member bends to form a gap between the inner wall of the storage chamber and the blocking member. Open Characterized in that it is a water ozone mixing device according to claim 3.

  The invention described in claim 5 is characterized in that it includes a receiving member provided in the accommodation chamber, formed with a receiving surface convexly curved in the opposite direction, and receiving the blocking member on the receiving surface. Item 5. The water ozone mixing device according to Item 4.

  According to a sixth aspect of the present invention, the gas passage is provided with a check valve for preventing the passage of water in the reverse direction while allowing the gas to pass from the gas inlet to the gas outlet. The water ozone mixing device according to any one of claims 1 to 5, wherein the water ozone mixing device is provided.

  According to a seventh aspect of the present invention, the gas passage includes a three-way branch that branches into a drainage opening that opens downward and a gas inlet that opens laterally. The ozone supply device is provided above the three-way branch with respect to the arrangement in the space, and generates ozone by performing discharge, and sends ozone generated by the ozone generator to the gas inlet The water ozone mixing device according to any one of claims 1 to 6, wherein the drainage channel is communicated with the drainage opening.

  According to an eighth aspect of the present invention, the gas inlet of the three-way branch faces obliquely upward, and the ozone generator is disposed above a connection portion between the ozone supply path and the gas inlet. The water / ozone mixing apparatus according to claim 7, wherein:

  The invention according to claim 9 is that the drainage channel is configured such that the drainage amount per fixed time of the drainage channel is equal to or greater than the amount of water per fixed time entering the gas passage from the gas outlet. The water ozone mixing device according to any one of claims 1 to 8, characterized in that it is a feature.

  The invention according to claim 10 is a water detection sensor for detecting water drained from the drainage channel, and an ozone supply control means for stopping the ozone supply device in response to detection by the water detection sensor. The water ozone mixing device according to any one of claims 1 to 9, characterized in that

  The invention according to claim 11 is characterized in that the water detection sensor is provided on the downstream side of the air inflow suppression means in the direction in which water flows out in the drainage channel. Water ozone mixing device.

  The invention according to claim 12 includes a water receiving portion for receiving water flowing out from the outlet of the drainage channel, and the water detection sensor is provided in association with the water receiving portion and accumulates in the water receiving portion. It is a sensor for detecting the amount of water, The water ozone mixing device according to claim 10 or 11 characterized by things.

  A thirteenth aspect of the present invention comprises a water supply channel for guiding water to the inlet, and an on-off valve provided in the water supply channel for opening and closing the water supply channel. Thru | or the water ozone mixing apparatus in any one of 12.

  The invention described in claim 14 is a pump for sucking and discharging water from a water source, and is connected to the discharge side of the pump, and ozone is mixed into the discharged water to purify the water. A water purification device comprising: the water ozone mixing device according to any one of claims 13 to 13; and a purified water supply channel that outputs water purified by mixing ozone with the water ozone mixing device. .

  The invention according to claim 15 is the water purification apparatus according to claim 14, wherein the water purification water supply channel is provided with an ozone decomposition device for removing ozone remaining in the purified water. It is.

  A sixteenth aspect of the present invention is the water purification device according to the fourteenth or fifteenth aspect, comprising a control device that controls the operation of the pump and the operation of the ozone supply device in an interlocked manner.

  The invention according to claim 17 is the water purification device according to claim 16, wherein the control device controls the pump and the ozone supply device in conjunction with each other based on the water pressure on the discharge side of the pump. is there.

  The invention according to claim 18 is characterized in that the water source is a water storage tank for storing water, and further includes a circulation channel for supplying water flowing out from the outlet into the water storage tank. The water purifier according to any one of claims 14 to 17.

  The invention according to claim 19 is a tank for storing water, a pump for sucking and discharging water stored in the tank, and ozone connected to the discharged water connected to the discharge side of the pump. A water ozone mixing device according to any one of claims 1 to 13 and an ozone water output pipe for ejecting ozone water mixed with ozone in the water ozone mixing device. This is an ozone water generator.

  The invention according to claim 20 has a water inlet at one end, a water outlet at the other end, a water channel communicating the inlet and the outlet, a gas inlet at one end, and a gas outlet at the other end A gas-liquid mixer having a gas passage that extends upward from the gas inlet toward the gas outlet, the gas outlet being joined in the middle of the water channel, and generating ozone. An ozone supply device that supplies gas from the gas inlet to the gas passage, and is provided in the gas passage, and allows passage of ozone from the lower side toward the upper gas outlet toward the front gas outlet, but water in the reverse direction. A check valve for blocking the passage, and the check valve opens the gas passage with ozone supply pressure when supplying ozone, and closes the gas passage with its own weight when ozone is not supplied. Including body Wherein a water ozone mixing device.

  The invention according to claim 21 is characterized in that the valve element is accommodated in the gas passage in a freely movable state and has an upper surface that is convexly curved upward. Water ozone mixing device.

  According to a twenty-second aspect of the present invention, in the gas passage, in order to prevent the position of the valve body from shifting, a projection that contacts the upper surface of the valve body is provided. 21. The water ozone mixing device according to 21.

  The invention according to claim 23 is a gas-liquid mixer having a liquid channel and a gas channel extending from below to mix gas with the liquid flowing through the liquid channel, and is formed in the gas channel. A valve body capable of opening and closing the gas passage by a supply pressure and its own weight when gas is supplied to the liquid passage through the gas passage. A gas-liquid mixer comprising a check valve including

  A twenty-fourth aspect of the invention is the gas-liquid mixer according to the twenty-third aspect, wherein the valve body has an upper surface that is convexly curved upward.

  In the invention according to claim 25, in order to prevent the position of the valve body from deviating in the valve chamber, a protrusion in contact with the upper surface of the valve body is provided. The elastic convex part which protrudes upwards, elastically deforms by being pressed by the projection, and biases the valve body so as to close the gas passage is provided. Or it is a gas-liquid mixer of 24.

  The invention according to claim 26 is the gas-liquid mixer according to claim 25, wherein the elastic convex portion is pressed locally.

  The invention according to claim 27 allows passage of fluid in one direction by opening a fluid passage hole for allowing fluid to pass through, but seals the fluid passage hole to allow fluid to flow in the opposite direction. A non-return valve for preventing passage of fluid; a sealing surface that seals the fluid passage hole when the fluid is prevented from passing in the reverse direction; and a check valve that is added to the fluid to be moved in the reverse direction. A pressure body to be pressed, and the pressure target surface is convexly curved in the one direction, and the pressure target surface protrudes in the one direction and is pressed from the one direction side. The check valve is provided with an elastic convex portion that is elastically deformed to urge the sealing surface toward the fluid passage hole.

  The invention according to claim 28 allows the passage of the fluid in one direction by opening the fluid passage hole for allowing the fluid to pass therethrough, but seals the fluid passage hole to allow the fluid to flow in the opposite direction. A non-return valve for preventing passage of fluid; a sealing surface that seals the fluid passage hole when the fluid is prevented from passing in the reverse direction; and a check valve that is added to the fluid to be moved in the reverse direction. A pressure body to be pressurized, and the pressurized surface is formed so as to release the pressure of the fluid that pressurizes the pressurized surface to the surroundings. A check, characterized in that it is provided with an elastic protrusion that protrudes in one direction and is elastically deformed by being pressed from the one direction side and biases the sealing surface toward the fluid passage hole. It is a valve.

  The invention according to claim 29 is the check valve according to claim 27 or 28, wherein the elastic convex portion is pressed locally.

  The invention according to claim 30 is the check according to any one of claims 27 to 29, wherein the valve body is accommodated in a free state in a valve chamber in which the fluid passage hole is formed. It is a valve.

  According to the first aspect of the present invention, even when the water in the water channel of the gas-liquid mixer enters the gas passage from the gas outlet, the water does not enter the ozone supply device and is drained. Drain through the road. As described above, since it is possible to prevent water from entering the ozone supply device, it is possible to prevent the ozone supply device from being exposed to water and being unable to discharge, and to supply ozone stably. In addition, during the ozone supply to the gas passage, the drainage channel is blocked by the air inflow suppression means, and external air does not flow into the gas channel from the drainage channel, so that the ozone concentration becomes low. Therefore, ozone can be efficiently supplied to the gas passage.

  According to the second aspect of the present invention, the gas-liquid mixer has a throttle portion in which the middle of the water channel is throttled, and the outlet of the gas passage is joined to the throttle portion. Therefore, ozone can be taken into the water channel by using the negative pressure generated by the flow of water whose flow velocity increases in the throttle portion by the water channel venturi action. More specifically, the ozone generated by the ozone supply device is mixed using the negative pressure generated by the water flowing through the throttle, so that, for example, a device such as a blower is not provided, and a simple configuration is used. Ozone can be mixed with water.

  According to the third aspect of the present invention, the blocking of the drainage channel by the air inflow suppression means is performed by a pressure change in the drainage channel that changes when ozone is sucked into the throttle portion. For example, this is performed using negative pressure generated in the throttle portion. In this way, there is no need to perform a separate operation from the outside, and the drainage channel can be automatically shut off with a simple configuration to prevent the inflow of air.

  According to the fourth aspect of the present invention, in the air inflow suppression means, the blocking member is provided in the housing chamber except when water flows out of the drainage channel (when draining) and when ozone is sucked into the throttle portion. It is in contact with or close to the inner wall. Therefore, even if the pressure change in the drainage channel is small, the blocking member operates reliably and can block the drainage channel by closing the inlet, so that the inflow of air can be reliably prevented.

  In addition, the blocking member has flexibility, and when water flows out of the drainage channel (when draining), the blocking member is pressed by the flowing water and bent so that the space between the inner wall of the storage chamber and the blocking member is large. Since the drainage channel is opened when the gap is formed, smooth drainage in the drainage channel can be ensured.

  According to the fifth aspect of the present invention, in the receiving surface of the receiving member that is convexly curved in the direction opposite to the direction in which water flows out during drainage (outflow direction), the peripheral side of the receiving surface is compared to the center side of the receiving surface. In addition, since it is located on the downstream side in the water outflow direction, a gap can be secured between the receiving surface and the inner wall of the storage chamber at the peripheral edge portion. Therefore, at the time of drainage, in the gap, the blocking member can be bent until the contact between the inner wall of the storage chamber and the blocking member is eliminated, and the drainage channel can be opened reliably.

  According to the sixth aspect of the present invention, the check valve is provided in the gas passage. For example, if a water hammer phenomenon or the like occurs in the water channel of the gas-liquid mixer, the water pressure in the water channel increases and water may enter the gas channel. However, if the check valve is provided as described above, it is possible to prevent such intrusion and backflow of water and prevent water from entering the ozone supply device.

  According to the seventh aspect of the present invention, the gas passage is provided with a three-way branch branched into a drainage opening that opens downward and a gas inlet that opens toward the side. Ozone generated in the generator is sent to the gas inlet by the ozone supply path, and the drainage path is communicated with the drainage opening. Therefore, the water that has entered the gas passage is drained from the drainage channel by gravity without flowing to the ozone supply channel side. Furthermore, since the ozone generator is disposed above the three-way branch, even if a part of water flows into the ozone supply path, water is supplied to the ozone generator via the ozone supply path. Is prevented from entering.

  According to the eighth aspect of the present invention, even if water in the water channel that has entered the gas passage through the gas outlet of the gas-liquid mixer reaches the gas inlet of the three-way branch, the gas inlet is obliquely upward Furthermore, since the ozone generator is disposed above the connection portion between the ozone supply path and the gas inlet, the water in the water channel that has entered the gas passage passes through the gas inlet and the ozone supply path. There is no risk of reaching the ozone generator. Therefore, the ozone generator can be reliably prevented from entering the water, and the water that has entered the gas passage can be reliably discharged through the drainage channel.

  According to the ninth aspect of the invention, when the drainage amount (A) of the drainage channel per fixed time and the amount of water (B) entering the gas passage are compared, A ≧ B. Therefore, the water that has entered the gas passage is smoothly drained through the drainage channel without stagnation in the gas passage. That is, it is possible to prevent the water that has entered from stagnating in the gas passage and flowing out to the ozone supply device side.

  According to the invention described in claim 10, the ozone supply device is stopped by the ozone supply control means in response to detection by the water detection sensor. In this way, if the ozone supply device is stopped in response to detection by the water detection sensor, even if water enters the ozone supply device, it is possible to prevent electrical leakage and electric shock, and to make the device safe. It can be operated.

  According to invention of Claim 11, the water detection sensor is provided in the downstream rather than the air inflow suppression means in a drainage channel. During the ozone supply to the gas passage, the upstream side of the air inflow suppression means in the drainage passage is filled with ozone, and if a water detection sensor is provided at such a position, there is a risk of being corroded by ozone. However, as described above, since the water detection sensor is provided on the downstream side of the air inflow suppression unit, the water detection sensor can be prevented from being corroded.

  According to the twelfth aspect of the invention, the detection by the water detection sensor is performed based on the amount of water accumulated in the water receiving portion. That is, water leakage detection is performed by the water detection sensor only when a predetermined amount of water is stored in the water receiving portion. Therefore, unnecessary water leak detection can be reduced and water purification processing can be performed efficiently. Further, ozone (gas) does not touch the water detection sensor, and there is no worry about corrosion of the sensor.

  According to the thirteenth aspect of the present invention, the open / close valve is provided in the water supply channel for guiding water to the inlet of the gas-liquid mixer. Therefore, the device can be made to function by operating the ozone supply device by operating the on-off valve during use.

  According to the invention described in claim 14, water from a water source is pumped up by a pump, and the water is efficiently sterilized and sterilized by ozone, so that water suitable for domestic water can be supplied.

  According to the fifteenth aspect of the invention, there is no residual ozone in the purified water released to the user use side, and the user can use the purified water with peace of mind.

  According to the sixteenth aspect of the present invention, it is possible to provide a water purification device that is easy to operate and easy to handle.

  According to the seventeenth aspect of the present invention, the water pressure discharged to the user use side can always be properly maintained, and the water purification device can be operated with good operability.

  According to the invention described in claim 18, the water stored in the water storage tank is pumped out by the pump, purified by ozone in the gas-liquid mixer, and then returned to the water storage tank again through the circulation channel. It is. Thus, purified water can be stored in the water storage tank by circulating water while purifying it. Moreover, if the purified water is stored in the water storage tank, the purified water can be easily used. Further, when the apparatus is operated by solar energy, purified water is produced during daylight hours and is prepared for use at night.

  According to the nineteenth aspect of the present invention, water such as tap water is stored in the tank, and ozone is mixed with the stored water. As a result, ozone water with excellent sterilization and deodorization functions, etc. is generated, and this ozone water is discharged from the ozone output tube. It can be used to remove odors and slimes.

  According to the twentieth aspect of the invention, when the check valve body is supplied with ozone, the gas passage is opened by the supply pressure of ozone (for example, the negative pressure generated in the gas passage), whereby the gas is introduced from the gas inlet. It is possible to allow ozone supplied to the passage to pass toward the gas outlet. On the other hand, when ozone is not supplied, the valve body closes the gas passage by its own weight, thereby preventing water from passing in the reverse direction (back flow). In this gas-liquid mixer, there is a risk that water in the water channel leaks downward into the gas channel from the gas outlet joined to the water channel. Even if it does not, the gas passage can be automatically opened and closed to prevent the back flow of water.

  According to invention of Claim 21, the valve body is accommodated in the gas passage in the free state which can move up and down. That is, the valve body is not supported by another member in the gas passage. Since the operation frequency of the valve body is relatively high for the use of the check valve, there is a possibility that the support portion may be damaged when supported by other members in the gas passage. Since the valve body is not supported by another member in the gas passage, the above-described supporting portion does not exist and there is no risk of damage.

  The valve body has an upper surface that is convexly curved upward. As described above, in this gas-liquid mixer, it is assumed that water in the water channel leaks downward into the gas passage from the gas outlet joined to the water channel and pressurizes the upper surface of the valve body. Since the upper surface of this is convexly curved upward, the pressure of water from the water channel can be released to the surroundings on this upper surface. For example, if the upper surface is uniformly flat from the outer edge to the inner center, the pressure of water from the water channel cannot be released to the surroundings, so if the inner part of the upper surface cannot withstand the pressure, the entire valve body will bend. Therefore, the valve body cannot completely close the gas passage, and there is a possibility that water will flow backward. However, as described above, the upper surface of the valve body of the present invention is convexly curved in the direction (upward) opposite to the direction in which water leaks out. Even if the pressure is applied to the upper surface of the valve body, the pressure body is released to the surroundings, so that the valve body does not bend and can maintain its entire shape. Therefore, the valve body can completely close the gas passage and reliably prevent the reverse flow of water.

  According to the invention described in claim 22, since the position of the valve body is prevented from being shifted by the protrusion provided in the gas passage, the valve body can be always arranged at an appropriate position where the gas passage can be opened and closed. Therefore, the operation reliability of the check valve can be improved.

  According to the invention of claim 23, the valve body of the check valve opens the gas passage by the supply pressure (for example, negative pressure generated in the gas passage) when the gas is supplied from the gas passage to the liquid passage. By doing so, the gas from a gas channel can be mixed with the liquid which flows through a liquid channel. On the other hand, by closing the gas passage by its own weight, it is possible to prevent the passage of the liquid in the direction opposite to the direction in which the gas from the gas passage is supplied to the liquid channel (back flow). In this gas-liquid mixer, the liquid from the liquid flow path may leak downward into the gas passage, but with a check valve having such a simple configuration, there is no need to perform a separate operation from the outside. The gas passage can be automatically opened and closed to prevent backflow of liquid.

  The valve body is housed in a free state in a valve chamber formed in the gas passage. That is, the valve body is not supported by another member in the valve chamber. Since the operation frequency of the valve body is relatively high for the use of the check valve, there is a possibility that the support portion may be damaged when it is supported by another member in the valve chamber. Since the valve body is not supported by another member in the valve chamber, the above-described support portion does not exist and there is no possibility of damage.

  According to the twenty-fourth aspect of the present invention, the valve body has an upper surface that is convexly curved upward. As described above, in this gas-liquid mixer, it is assumed that the liquid in the liquid flow channel leaks downward into the gas passage and pressurizes the upper surface of the valve body, but the upper surface of the valve body is curved upward. Therefore, on this upper surface, the pressure of the liquid from the liquid flow path can be released to the surroundings. For example, when the upper surface is uniformly flat from the outer edge to the inner center, the pressure of the liquid from the liquid flow path cannot be released to the surroundings, so if the inner portion of the upper surface cannot withstand the pressure, the entire valve body May be bent and the valve body cannot completely close the gas passage, and there is a possibility that a back flow of liquid may occur. However, as described above, the upper surface of the valve body of the present invention is convexly curved in the direction (upward) opposite to the direction in which the liquid leaks. Even if the pressure is applied to the upper surface of the valve body, the pressure body is released to the surroundings, so that the valve body does not bend and can maintain its entire shape. Therefore, the valve body can completely close the gas passage and reliably prevent the liquid from flowing backward.

  According to the invention of claim 25, since the position of the valve body is prevented from being displaced by the protrusion provided in the valve chamber, the valve body is always arranged at an appropriate position in the valve chamber where the gas passage can be opened and closed. It is possible to improve the operation reliability of the check valve.

  An elastic convex portion is provided on the upper surface of the valve body, and the elastic convex portion is elastically deformed by being pressed by the protrusion, and urges the valve body to close the gas passage. For example, in the case of a liquid having a very low pressure as opposed to the water hammer phenomenon described above, the liquid may flow backward through a minute gap between the valve body closing the gas passage and the gas passage. There is. However, since the elastic convex portion is pressed by the protrusion to urge the valve body so as to close the gas passage, the above-described minute gap is eliminated and the liquid backflow can be reliably prevented. it can.

  Therefore, the backflow of the liquid can be reliably prevented regardless of the magnitude of the pressure of the liquid by the elastic convex portion and the upper surface of the valve body that is convexly curved upward (see claim 22).

  According to the invention of claim 26, since the elastic convex portion is pressed locally, the pressing force from the projection provided in the valve chamber is concentrated and acted on, so a small pressing force is applied. However, it can be easily elastically deformed to urge the valve body so as to close the gas passage, and reliably eliminate the minute gap between the valve body closing the gas passage and the gas passage. it can.

  According to the invention of claim 27, the check valve can allow the fluid to pass in one direction by opening the fluid passage hole, while the check valve seals the fluid passage hole. The passage of fluid in the reverse direction (reverse flow) can be prevented.

  The check valve includes a valve body having a sealing surface that seals the fluid passage hole when blocking back flow of the fluid and a pressurized surface that is pressurized by the fluid. The curve is convex in one direction as described above, that is, in a direction opposite to the direction of fluid reverse flow. Therefore, the pressure of the fluid that pressurizes the surface to be pressurized can be released to the surroundings on the surface to be pressurized. For example, when the pressurized surface is uniformly flat from the outer edge to the inner center, the pressure of the fluid that pressurizes the pressurized surface cannot be released to the surroundings, so that the inner portion of the pressurized surface can withstand the pressure. If it disappears, the whole valve body will bend, and a clearance gap will arise between a sealing surface and a fluid passage hole, and there exists a possibility that the backflow of a fluid may arise from the clearance gap. However, as described above, the surface to be pressurized of the valve body of the present invention is convexly curved in the direction opposite to the fluid reverse flow direction. For example, the pressure of the fluid rapidly increased by the water hammer phenomenon Even when the pressure is applied, the pressure is released to the surroundings, so that the valve body does not bend and can maintain its overall shape. Therefore, the sealing surface can seal the fluid passage hole without any gap, and can reliably prevent the fluid from flowing backward.

  On the other hand, in the case of a fluid of extremely low pressure as opposed to the water hammer phenomenon, this fluid may flow backward through a minute gap between the sealing surface and the fluid passage hole. Since the elastic convex portion is elastically deformed by being pressed and urges the sealing surface toward the fluid passage hole, the minute gap described above is eliminated, and the backflow of fluid can be reliably prevented. it can.

  Therefore, the back flow of the fluid can be reliably prevented regardless of the pressure of the fluid.

  According to the invention of claim 28, the check valve can permit the passage of fluid in one direction by opening the fluid passage hole, while the check valve seals the fluid passage hole. The passage of fluid in the reverse direction (reverse flow) can be prevented.

  The check valve includes a valve body having a sealing surface that seals the fluid passage hole when blocking back flow of the fluid and a pressurized surface that is pressurized by the fluid. The fluid pressure for pressurizing the surface to be pressurized is formed to escape to the surroundings. For example, when the pressurized surface is uniformly flat from the outer edge to the inner center, the pressure of the fluid that pressurizes the pressurized surface cannot be released to the surroundings, so that the inner portion of the pressurized surface can withstand the pressure. If it disappears, the whole valve body will bend, and a clearance gap will arise between a sealing surface and a fluid passage hole, and there exists a possibility that the backflow of a fluid may arise from the clearance gap. However, as described above, the pressurized surface of the valve body of the present invention is formed so as to release the pressure of the fluid that pressurizes the pressurized surface to the surroundings. Even if the pressure of 2 is applied, the pressure is released to the surroundings, so that the valve body does not bend and can maintain its overall shape. Therefore, the sealing surface can seal the fluid passage hole without any gap, and can reliably prevent the fluid from flowing backward.

  On the other hand, in the case of a fluid of extremely low pressure as opposed to the water hammer phenomenon, this fluid may flow backward through a minute gap between the sealing surface and the fluid passage hole. Since the elastic convex portion is elastically deformed by being pressed and urges the sealing surface toward the fluid passage hole, the minute gap described above is eliminated, and the backflow of fluid can be reliably prevented. it can.

  Therefore, the back flow of the fluid can be reliably prevented regardless of the pressure of the fluid.

  According to the twenty-ninth aspect of the present invention, since the elastic convex portion is pressed locally, the pressing force is concentrated and acts on the elastic convex portion. The stop surface is urged toward the fluid passage hole, and the gap between the sealing surface and the fluid passage hole can be surely eliminated.

  According to the invention of claim 30, the valve body is housed in a free state in the valve chamber in which the fluid passage hole is formed. That is, the valve body is not supported by another member in the valve chamber. Since the operation frequency of the valve body is relatively high for the use of the check valve, there is a possibility that the support portion may be damaged when it is supported by another member in the valve body. Since the valve body is not supported by other members in the valve body, the above-described support portion does not exist and there is no risk of damage.

<Example 1>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(Configuration of water purification device 1)
FIG. 1 is a schematic perspective view of a water purification apparatus 1 according to an embodiment of the present invention. FIG. 2 is a system diagram illustrating a configuration example of the water purification device 1. In addition, when mentioning a direction, the arrow which shows the direction shown in figure is referred. In the system diagram of FIG. 2, the solid line arrows represent the flow of water, and the broken line arrows represent the flow of electricity.

  Referring mainly to FIG. 2, this water purification apparatus 1 includes a water ozone mixing apparatus 2 according to the present invention, and ozone is mixed with water by this water ozone mixing apparatus 2 to purify the water. . More specifically, the water purification apparatus 1 includes a pump 5 for sucking raw water from a water source 3 such as a well or a river through a suction pipe 4, and raw water supply water as a water supply channel that is a raw water channel discharged from the pump 5. An ozone mixer 7 that is connected to the pipe 6 and the raw water supply pipe 6 and mixes ozone with the raw water, and an ozone supply device 8 that generates ozone and supplies the generated ozone to the ozone mixer 7. (The ozone mixer 7 and the ozone supply device 8 are included in the water ozone mixing device 2), and purified water supply water for supplying purified water mixed and purified by the ozone mixer 7 to the user side. A clean water supply pipe 9 serving as a road and an ozone water output pipe, and an ozone deodorizing column 10 as an ozone decomposing apparatus that is inserted into the purified water supply pipe 9 and decomposes ozone remaining in the purified water. These water water source 3 is purified by further residual ozone is decomposed and supplied to the user as domestic water.

  The pump 5 includes a pressure sensor 11 for detecting a flow path pressure (discharge side flow path pressure) of the raw water supply pipe 6, an impeller (not shown), and a motor (not shown) for rotating the impeller. Z). The pressure sensor 11 is a sensor that is turned off when the discharge-side flow path pressure is equal to or higher than a predetermined pressure, and is turned on when it is lower than the predetermined pressure. The ON / OFF signal of the pressure sensor 11 is given to the control unit 49 described later. When the pressure sensor 11 is turned ON by the control signal, the pump 5 is driven. Therefore, the raw water is always sent to the ozone mixer 7 at a predetermined pressure or higher.

  Here, the configuration of the ozone mixer 7 will be described with reference to FIG. FIG. 3 is an illustrative view of the ozone mixer 7. In FIG. 3, the solid line arrows represent the water flow, and the broken line arrows represent the gas flow.

  The ozone mixer 7 includes a water channel 14 as a liquid channel having a water inlet 12 at one end and a water outlet 13 at the other end.

  The water channel 14 has a narrowed portion 15 that is narrowed in the middle and narrowed in inner diameter. A gas passage 16 is connected to the throttle portion 15. The gas passage 16 has a check valve 17 in the middle thereof and a three-way branch 18 below the check valve 17. An inlet 19 as a gas inlet that opens to the side of the three-way branch 18 is an inlet into which ozone enters, and an outlet 20 as a gas outlet at the upper end from which ozone exits is T-shaped with respect to the throttle portion 15. Communicated in a shape.

  The flow rate of water flowing in from the inflow port 12 is increased in the throttle portion 15. Due to the flow of water with the increased flow velocity, the inside of the throttle portion 15 becomes a negative pressure. Due to this negative pressure, the ozone that has flowed into the gas passage 16 is sucked into the water passage 14 from the outlet 20 and has a diameter of, for example, It is mixed in water as ultrafine bubbles (so-called microbubbles) of 50 μm or less. In this way, when the throttle part 15 is provided in the water channel 14 to form a venturi structure, for example, a device such as a blower is not provided, and the negative pressure generated by the flow of water in the throttle part 15 is used to enter the water channel 14 Ozone can be taken in efficiently.

  In addition, in this embodiment, although the ozone mixer 7 was demonstrated as a venturi structure, as the ozone mixer 7, a T-tube etc. can be used, for example. If it is a T-shaped tube, there is no throttle part 15 and there is no portion with a small diameter in the water channel, so that the water channel can be prevented from being clogged with foreign substances.

  Referring to FIG. 2, ozone supply device 8 has an ozone generator 21 that converts oxygen in the air into ozone by discharging the air.

  The ozone generator 21 has a discharge element circuit (not shown) and a discharge electrode plate (not shown) therein, and is electrically connected to a control unit 49 (described later).

  Further, the ozone supply device 8 includes an intake pipe 22 for sucking air outside the casing 27, which will be described later, a filter 23 inserted in the intake pipe 22, an ozone supply pipe 24 as an ozone supply path, and an ozone supply pipe 24. An inserted check valve 17 is included, the intake pipe 22 is connected to the intake port 25 of the ozone generator 21, and the ozone supply pipe 24 is connected to the exhaust port 26 of the ozone generator 21. When the ozone generator 21 is turned on by the control unit 49 (described later), the air taken into the ozone generator 21 from the intake port 25 is discharged by an electrode plate (not shown) (for example, creeping discharge, Ozone is generated by being silently discharged. Since dust contained in the air flowing from the air inlet 25 is captured by the filter 23, the dust is mixed into the ozone generator 21, and the discharge element (not shown) and the electrode plate (not shown) are damaged. This can be prevented.

  The generated ozone flows out from the exhaust port 26 and can be supplied to the inlet 19 of the three-way branch 18 through the check valve 17 and the ozone supply pipe 24 (see FIG. 3).

  Ozone is supplied by the ozone mixer 7, and the water purified by sterilization and sterilization by ozone flows through the purified water supply pipe 9, and the residual ozone is decomposed in the ozone deodorizing column 10 and supplied to the user use side. The The ozone decomposition in the ozone deodorization column 10 will be specifically described. The ozone deodorization column 10 is filled with activated carbon, for example, and this activated carbon and unreacted ozone remaining in the purified water undergo oxidation reaction. Thus, unreacted ozone is decomposed. By being decomposed in this way, ozone does not exist in the water supplied to the user use side, and the user can use the purified water with peace of mind.

  Water is purified according to the flow described above, and the purified water is supplied to the user. In the water purification apparatus 1, such water purification is performed in a housing 27 in which the water ozone mixing apparatus 2 is accommodated (see FIG. 1).

  The casing 27 is disposed above the pump 5, and an operation display section 55 for performing various operations and various displays related to the operation of the water purification device 1 is formed on the surface thereof. The operation display unit 55 is electrically connected to a control unit 49 (described later). Therefore, the user can operate the water purification apparatus 1 by operating the operation display unit 55 to give an instruction to the control unit 49 (described later) and know the operation state.

  Further, as described above, the housing 27 accommodates the control unit 49 that is electrically connected to the pump 5 and the ozone generator 21. As described above, the operation display unit 55 is formed in the housing 27 as a purification device related to the operation / control / operation of water purification, and the ozone generator 21, the ozone mixer 7, and the control unit 49 are installed in the housing 27. Therefore, the user can easily perform maintenance such as periodic replacement of parts and repair of a failed part, for example. The electrical configuration of the control unit 49 will be described later in detail with reference to FIG.

  The ozone deodorizing column 10 is attached to the outer surface of the casing 27. Since the ozone deodorization column 10 is provided in the vicinity of the casing 27, maintenance of the ozone deodorization column 10, for example, replacement of activated carbon filled in the ozone deodorization column 10 or replacement of the ozone deodorization column 10 main body, etc. Can be easily performed. Furthermore, since it is provided not on the inside of the casing 27 but on the outside, it is not necessary to open the lid of the casing 27 when performing maintenance.

  Further, in the casing 27, the ozone generator 21 is disposed above the three-way branch 18. For this reason, even if water may enter the three-way branch 18, the water can be prevented from entering the ozone generator 21.

  1, for example, the raw water supply pipe 6 (downstream of the elbow pipe 28) and the purified water supply pipe 9 (upstream of the ozone deodorizing column 10) can be attached and detached, and the casing 27 needs to be purified of water. It can also be configured so that it can be carried to the place where it will be.

  Referring to FIG. 3 again, a check valve 17 is inserted in the gas passage 16 connected to the water channel 14. The check valve 17 allows a flow (especially ozone flow) flowing from the bottom to the top in the gas passage 16 but prevents a flow flowing from top to bottom (especially water flow).

  Here, a configuration example of the check valve 17 will be described with reference to FIG. FIG. 4 is an illustrative view of the check valve 17. FIG. 4 (a) shows a state when water is not flowing in the water channel 14 (hereinafter, referred to as normal time), and FIG. 4 (b) is a water channel. 14 shows a state when water is flowing (hereinafter referred to as suctioning). In FIG. 4, broken line arrows indicate gas flow.

  The check valve 17 includes a valve chamber 29, a ball valve 30 that can move in the valve chamber 29, and a fluid passage formed on one side (for example, the lower side) and the other side (for example, the upper side) of the valve chamber 29. It has an inlet 31 and an outlet 32 as holes, and a spring 33 that urges the ball valve 30 to always block the inlet 31. The shape of the valve chamber 29 is a rocket shape that tapers upward in this example, but is not limited thereto. The point is that the ball valve 30 can move in the valve chamber 29 and the fluid can move between the inlet 31 and the outlet 32 when the inlet 31 is not blocked.

  The ball valve 30 is, for example, a known sphere such as rubber or resin, and has a diameter larger than that of the inlet 31.

  The spring 33 has a biasing force that allows the ball valve 30 to move upward due to negative pressure during suction. The spring 33 exemplifies a coil spring, but may be, for example, a bar spring or a plate spring.

  As shown in FIG. 4A, the check valve 17 is normally closed at the inlet 31 by the weight of the ball valve 30 and the biasing force of the spring 33. For this reason, even if water enters the valve chamber 29, the water is blocked in the valve chamber 29.

  On the other hand, at the time of suction, as shown in FIG. 4B, the ball valve 30 is sucked by negative pressure, and the blocked inlet 31 is in communication with the inside of the valve chamber 29. Therefore, the path connecting the ozone generator 21 → the ozone supply pipe 24 → the inlet 19 of the three-way branch 18 → the gas passage 16 is communicated, and ozone is supplied to the gas passage 16. At the time of suction, since water flows in the water channel 14, the water does not leak from the outlet 20 to the gas passage 16.

  Further, if the check valve 17 is provided, the water in the water channel 14 is caused by, for example, a water hammer phenomenon caused by switching from the suction state to the normal state and suddenly stopping the water flow in the water channel 14. Even if the gas enters the gas passage 16 from the outlet 20, the inlet 31 of the valve chamber 29 is blocked by the ball valve 30, so that the water that has entered is blocked by the check valve 17. Therefore, it is possible to prevent water from entering the downstream side of the check valve 17, that is, the ozone generator 21 side (gas supply side). Even if the check valve 17 inserted in the gas passage 16 is damaged and water passes through the check valve 17, the check valve 17 is further connected to the ozone supply pipe 24. Since 17 is inserted, water can be blocked by the check valve 17, and water can be prevented from entering the ozone generator 21.

  A plurality of check valves 17 in the gas passage 16 may be arranged in series if necessary.

  Referring to FIG. 3, the three-way branch 18 is provided with a drain outlet 34 as a drain opening that opens downward in addition to the inlet 19 described above. A drain pipe 35 is connected as a drainage channel for draining water that has entered the passage 16 (see FIG. 2).

  The drain pipe 35 extends downward from the three-way branch 18, and in the middle of the drain pipe 35 is a drain valve as air inflow suppression means for suppressing air from flowing through the drain pipe 35 during ozone supply. 36 is provided. Moreover, the outlet of the lower end of the drain pipe 35 is provided with a water receiving tray 37 as a water receiving portion for receiving water flowing out from the outlet (see FIG. 2).

  The drain pipe 35 is for draining water that has entered the gas passage 16 to the outside. As described above, since the check valve 17 is inserted in the gas passage 16, normally, the infiltrated water is blocked by the ball valve 30. In some cases, water leaks from a slight gap with 31 and flows down to the drain pipe 35 via the three-way branch 18. Even in such a case, since the drain pipe 35 is provided, the water that could not be blocked by the check valve 17 can be drained to the outside.

  Further, the flow path diameter of the drain pipe 35 is designed so that a water amount equal to or larger than the water amount leaking from the outlet 20 to the gas passage 16 per certain time (for example, 10 minutes) can be drained. Therefore, for example, even when the check valve 17 is not provided or when the check valve 17 is damaged, the water leaked into the gas passage 16 does not stagnate in the drain pipe 35 and smoothly flows to the outside. Drained. That is, it is possible to prevent water from stagnating in the drain pipe 35 and flowing out from the inlet 19 of the three-way branch 18 to the ozone generator 21 side.

  The drain valve 36 is a valve for suppressing air from flowing in the direction opposite to the water flow direction of the drain pipe 35 during ozone supply.

  Here, with reference to FIG. 5, the structural examples, such as the drain valve 36 and the water tray 37, are demonstrated. FIG. 5 is an illustrative view showing an example of the drain valve 36. FIG. 5 (a) shows a normal state, and FIG. 5 (b) shows a suction state. In FIG. 5, a solid line arrow indicates a water flow, and a broken line arrow indicates a gas flow. Moreover, about FIG.5 (b), the figure which shows structures, such as the water tray 37 shown to Fig.5 (a), is abbreviate | omitted.

  Referring to FIG. 5, the drain valve 36 has a valve chamber 38 and a ball valve 39 accommodated in the valve chamber 38.

  An inlet 40 is formed on the upper surface of the valve chamber 38. A recess 41 in which the ball valve 39 is located under its own weight is formed on the lower surface of the valve chamber 38, and an outlet 42 is formed on the lower surface avoiding the recess 41. The drain valve 36 is inserted into the drain pipe 35 so that the flow path connecting the inlet 40 and the outlet 42 becomes a part of the flow path of the drain pipe 35.

  The ball valve 39 is, for example, a known sphere such as rubber or resin, and is formed larger than the diameter of the inlet 40.

  As shown in FIG. 5A, the ball valve 39 is normally positioned in the recess 41 in the valve chamber 38 due to its own weight. Therefore, the water falling through the drain pipe 35 is drained through the drain valve 36.

  On the other hand, at the time of suction, as shown in FIG. 5B, the ball valve 39 is sucked by negative pressure and the inlet 40 is closed. Therefore, the drain pipe 35 located upstream from the drain valve 36 is blocked from the outside through the drain valve 36.

  The inside of the water tray 37 is partitioned into two rooms by a partition wall 73 that is lower than the height of the peripheral wall of the water tray 37, and one of the two rooms is drained from the outlet of the drain pipe 35. The other chamber is an overflow chamber 75 into which the water that has overflowed beyond the partition wall 73 enters. A discharge pipe 76 that leads to the outside of the casing 27 is connected to the overflow chamber 75 (see FIG. 2). The water drained from the outlet of the drain pipe 35 is once received in the water receiving chamber 74, and when the water level is below the height of the partition wall 73, it does not overflow into the overflow chamber 75 and evaporates with time. . On the other hand, when the water level exceeds the height of the partition wall 73, the excess amount overflows into the overflow chamber 75 as shown by the solid line arrow in FIG. Is done.

  Further, a water leak sensor 45 as a water detection sensor is provided at a position slightly lower than the upper end portion of the partition wall 73 on the circumferential surface wall of the water tray 37.

  The water leak sensor 45 turns on when it detects that the water level stored in the water receiving chamber 74 is equal to or higher than a predetermined water level (for example, the height of the broken line in FIG. 5A), and otherwise. It is a sensor that turns off. The ON / OFF signal of the water leak sensor 45 is given to the control unit 49. When the water leak sensor 45 is turned ON by the control signal and a predetermined time elapses, the pump 5 and the ozone generator 21 are turned off by the control unit 49. Is done. The flow of detection by the water leak sensor 45 will be described in detail later with reference to FIG.

  A second configuration example of the drain valve 36 will be described with reference to FIG.

  The drain valve 36 of the second configuration example has a valve chamber 38 and a disc valve 46 accommodated in the valve chamber 38. A stopper 47 that receives the disc valve 46 is provided in the valve chamber 38. The valve chamber 38 has an inlet 40 formed on the upper surface, and a large outlet 42 formed on the lower surface below the stopper 47.

  The disk valve 46 is, for example, a known disk-shaped valve such as rubber or resin, and has a diameter larger than the diameter of the inlet 40.

  The stopper 47 is disposed at such a height that a gap 48 is formed between the periphery of the disc valve 46 and the inner wall of the valve chamber 38 when the disc valve 46 is received.

  As shown in FIG. 6A, the disc valve 46 is normally received by a stopper 47 due to its own weight. Therefore, the drain pipe 35 on the inlet 40 side and the drain pipe 35 on the outlet 42 side communicate with each other through the drain valve 36, and the leaking water is drained through the drain pipe 35.

  On the other hand, at the time of suction, as shown in FIG. 6B, the disc valve 46 is sucked by negative pressure and the inlet 40 is closed. A drain pipe 35 located on the upstream side of the drain valve 36 is blocked from the outside through the drain valve 36.

  Thus, during suction, that is, during ozone supply to the inlet 19, the drain pipe 35 is shut off from the outside through the drain valve 36, and external air passes through the drain pipe 35 through the three-way branch 18, Since it does not flow into the gas passage 16, it is possible to prevent the concentration of supplied ozone from being lowered, and to supply ozone at a constant concentration stably. As a result, water can be efficiently purified. Further, since the drain pipe 35 can be shut off by using the negative pressure generated in the throttle portion 15, it is not necessary to perform a separate operation and the inflow of air from outside can be automatically prevented. .

  In this embodiment, the inflow of air during ozone supply is blocked by the drain valve 36. However, instead of the drain valve 36, for example, an electromagnetic valve is provided and controlled by the control unit 49 (described later). You can also. In this case, during operation of the water purification apparatus 1, the electromagnetic valve is closed so that air does not flow in. When the water purification apparatus 1 is stopped, the electromagnetic valve is opened so that water leaking from the outlet 20 can be drained.

  The water purification apparatus 1 includes, for example, an ozone supply control means for controlling the pump 5, the ozone generator 21, and the like, and a control unit 49 as a control device. It is housed inside and connected to an external power source 50 (see FIG. 2). Here, the controller 49 will be described with reference to FIG.

  FIG. 7 is a block diagram showing an electrical configuration of the water purification device 1 and shows a portion related to the present invention.

  The control unit 49 is constituted by, for example, a microcomputer, and includes a CPU 51, a ROM 52, a RAM 53, and a timer 54. The control unit 49 is electrically connected to the operation display unit 55, the ozone generator 21, the pump 5, the water leak sensor 45, and the pressure sensor 11, respectively.

  The operation display unit 55 includes a power switch 56 for turning on / off the control unit 49, an ozone switch 57 for turning on / off the ozone generator 21, and a power LED 58 for performing various displays to the user. In addition, an ozone LED 59 and an abnormal LED 60 are provided.

In the configuration of the water purification device 1 described above, the portion composed of the ozone mixer 7, the ozone supply device 8, the drain pipe 35, and the drain valve 36 is the water ozone mixing device 2 according to the present invention. In the water purification device 1, when the user operates the operation display unit 55, the water ozone mixing device 2 is controlled by the control unit 49, so that ozone is mixed with water and the water is purified. It is.
(Control of water purification device 1)
FIG. 8 is a flowchart showing the control operation of the control unit 49 related to the purified water supply of the water purification device 1. Hereinafter, with reference to FIG. 8, the control regarding the purification water supply of the water purification apparatus 1 is demonstrated.

  When the power switch 56 is turned on by the user (Yes in step S1), it is determined whether or not the ozone switch 57 is turned on (step S2). If the ozone switch 57 is not turned on (No in step S2), the pump 5 is controlled independently (step S9). That is, only the pump 5 is turned on, and ozone is not supplied to the water of the water source 3 but is supplied as it is to the user side. On the other hand, when the ozone switch 57 is turned on (Yes in step S2), the pump 5 and the ozone generator 21 are interlocked and controlled (step S3). That is, when the user opens the faucet or the like, the water pressure in the flow path drops and the pressure sensor 11 is turned on (Yes in step S4), both the pump 5 and the ozone generator 21 are turned on (step S5). Purified water supply is performed in which water from the water source 3 is purified by ozone and supplied.

  Then, when the pressure sensor 11 is turned OFF during purification water supply (Yes in Step S6), it is determined whether or not T1 seconds, for example, 1 second has elapsed since the pressure sensor 11 was turned OFF (Step S7). When T1 seconds have elapsed (Yes in step S7), the pump 5 and the ozone generator 21 are turned off (step S8), and the purified water supply is completed. The user can also end the purified water supply by turning off the power switch 56. In addition, when the user wants to use the purified water again after the water supply is completed, it is only necessary to open the faucet. That is, when the user opens the faucet, the pressure sensor 11 is turned on again (Yes in step S4), and the pump 5 and the ozone generator 21 are automatically turned on in conjunction with this, so the user uses clean water. can do.

  Thus, by controlling the pump 5 and the ozone generator 21 in conjunction with each other, it is possible to provide the water purification device 1 that is easy to operate and easy to handle. Moreover, since the water pressure in the flow path is controlled by the pressure sensor 11, the water pressure discharged to the user use side is always properly maintained, and the water purification device 1 with good operability can be obtained.

  FIG. 9 is a flowchart showing the control operation of the control unit 49 related to water leak abnormality detection of the water purification apparatus 1. Hereinafter, with reference to FIG. 9, the control regarding the water leak abnormality detection of the water purification apparatus 1 is demonstrated. Here, the detection of water leakage abnormality is to detect that water leaking from the gas passage 16 may enter the ozone generator 21.

  During the purified water supply to the user shown in FIG. 8, when water of a predetermined level or more is accumulated in the water receiving chamber 74 and the water leak sensor 45 is turned on (Yes in step S11), the water leak sensor 45 is turned on. It is determined whether T2 seconds, for example, 1 second has elapsed (step S12). When T2 seconds elapse (Yes in step S12), the pump 5 and the ozone generator 21 are turned off (step S13), the abnormal LED 60 is turned on, the ozone LED 59 blinks (step S14), and water supply to the user is performed. Stopped.

  When the user wants to use the purified water again after the water supply is stopped, the water purification apparatus 1 can be restarted by turning the power switch 56 ON again. At this time, the water leak sensor 45 is reset to the initial state. That is, even when the water supply is stopped while the water leak sensor 45 is ON, after the restart, it is reset to the OFF state. If water of a predetermined water level or more remains in the water receiving chamber 74 even after the water supply is stopped, the above processing and determination (steps S11 to 14) are performed again immediately after the restart, and the water supply is stopped.

  Thus, by stopping the pump 5 and the ozone generator 21 according to the detection of the water leak sensor 45, it is possible to prevent electric leakage and electric shock, and to operate the water purification apparatus 1 safely. Can do.

  At the same time, since the user is notified of the abnormality by turning on the abnormality LED 60 or blinking the ozone LED 59, the user can quickly cope with the water leakage abnormality detection. Further, if the water level in the water receiving chamber 74 is less than a predetermined water level (for example, the height of the broken line in FIG. 5A), the water leak sensor 45 does not detect that the water leak is abnormal, and further the water leak sensor. Even when 45 is turned on, if T2 seconds have not elapsed (No in step S12), the water leakage abnormality detection is not performed. Therefore, it is possible to prevent the user from being forced to deal with an unnecessary water leakage abnormality, and the water purification process can be performed efficiently.

  As described above, in this water purification apparatus 1, even when the water in the water channel 14 leaks from the inlet 19, the water is passed from the inlet 19 to the ozone generator 21 side at the three-way branch 18. The water is drained from the drainage port 34 through the drainage pipe 35 without entering. As described above, since it is possible to prevent water from entering the ozone generator 21, it is possible to prevent the ozone generator 21 from being exposed to water and being unable to discharge, and to stably supply ozone. it can. That is, it is possible to prevent a reduction in water quality improvement efficiency (ozone mixing efficiency).

  Further, during the ozone supply to the inlet 19, the drain pipe 35 is shut off from the outside through the drain valve 36, and external air flows into the gas passage 16 from the drain pipe 35 through the three-way branch 18. Therefore, the concentration of the supplied ozone can be prevented from being lowered, and a constant concentration of ozone can be stably supplied. As a result, water can be efficiently purified.

Furthermore, since the pump 5 and the ozone generator 21 are stopped by detecting the water leakage abnormality by the water leakage sensor 45, it is possible to prevent electrical leakage and electric shock and to operate the water purification device 1 safely. .
<Modification 1>
(Configuration of water purification device 1)
FIG. 10 is a schematic perspective view of the water purification apparatus 1 according to the first modification of the present invention. FIG. 11 is a system diagram illustrating a configuration example of the water purification device 1 according to the first modification. In addition, about the part which overlaps with FIG. 1 and FIG. 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the system diagram of FIG. 11, the solid line arrows represent the flow of water, and the broken line arrows represent the flow of electricity.

  Referring mainly to FIG. 11, the water purification apparatus 1 according to the first modification is not provided with the pump 5 and the pressure sensor 11 as shown in FIG. 2, and the raw water supply pipe 6 is connected to the raw water supply pipe. An opening / closing valve 61 as an opening / closing valve for opening / closing 6 is provided.

  The open / close valve 61 is, for example, a valve such as an electromagnetic valve that is electrically opened and closed, and is electrically connected to the control unit 49. Therefore, the user can use purified water by connecting the raw water supply pipe 6 to, for example, a faucet or the like and opening and closing the opening / closing valve 61 as appropriate. In addition, the purified water supplied to a user is produced | generated by the method similar to the said Example 1. FIG.

  FIG. 12 is a schematic plan view of the operation display unit 55 of the water purification device 1 according to the first modification. FIG. 13 is a block diagram illustrating an electrical configuration of the water purification apparatus 1 according to the first modification, and illustrates a portion related to the first modification. In addition, about the part which overlaps with FIG. 7, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  The control unit 49 of the water purification device 1 according to the first modification is configured with, for example, a microcomputer. The control unit 49 is electrically connected to the operation display unit 55, the ozone generator 21, the open / close valve 61, and the water leak sensor 45, respectively.

In addition to the power switch 56, the power LED 58, the ozone LED 59, and the abnormality LED 60, the operation display unit 55 opens and closes a course switch 62 for selecting whether ozone is mixed in the water to be supplied, and an opening / closing valve 61. A water supply switch 63 and a water supply LED 64 for displaying whether or not the water supply is in progress are provided. Therefore, the user can open and close the open / close valve 61 to supply water by operating the operation display unit 55, or can generate purified water by mixing ozone into the supplied water.
(Control of water purification device 1)
FIG. 14 is a flowchart showing a control operation of the control unit 49 related to the purified water supply of the water purification apparatus 1 according to the first modification. Hereinafter, with reference to FIG. 14, the control regarding the purification water supply of the water purification apparatus 1 which concerns on the modification 1 is demonstrated.

  When the power switch 56 is turned on by the user (step S21), the course setting is read from the ROM 52 (step S22). Here, the course setting is, for example, program contents in which the amount of ozone supplied to the water being supplied is set, and the user can change the course setting by appropriately changing the contents of the ROM 52. it can. When the course switch 62 is turned on (Yes in step S23), the ozone generator 21 is turned on (step S24).

  Then, when the water supply switch 63 is turned on (step S25) and water supply is started by opening the opening / closing valve 61 (step S26), ozone is supplied to the ozone mixer 7 by negative pressure. At this time, water supply is started even when the water supply switch 63 is turned on without the course switch 62 being turned on (No in step S23). At this time, water not mixed with ozone is sent to the user use side. Further, even when the user starts water supply without turning on the course switch 62, the user can supply ozone to the ozone mixer 7 by turning on the course switch 62 during water supply. Thereafter, when the power switch 56 is turned off (step S27), the purified water supply ends.

  Thus, if the open / close valve 61 is provided in the raw water supply pipe 6 and the user can appropriately supply purified water by operating it appropriately, for example, a water source (for example, a well, a river, etc.) and the user's Even if the place of use is remote, if the pump is driven near the water source and the opening / closing valve 61 is provided near the place of use of the user, there is no need to drive the pump, etc. every time it is used. The purified water can be used simply by operating the on-off valve 61 according to the time of use.

  Further, since the pump 5 is not driven by the pressure sensor 11 as in the first embodiment, there is no need to provide a flow opening / closing component such as a faucet on the user side. In other words, the water purification apparatus 1 according to the first modified example is used to purify the water regardless of the situation (for example, the presence or absence of a faucet) where the ends of the raw water supply pipe 6 and the purified water supply pipe 9 communicate. Can be used.

In addition, about the control of the water leak abnormality detection of the water purification apparatus 1 which concerns on this modification 1, since it is the same as that of Example 1, description is abbreviate | omitted here.
<Modification 2>
(Configuration of water purification device 1)
FIG. 15 is a system diagram illustrating a configuration example of the water purification device 1 according to the second modification. In addition, about the part which overlaps with FIG. 1 and FIG. 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the water purification apparatus 1 according to the second modification, the water source 3 shown in FIG. 2 is a tank 65 as a water storage tank for storing water.

  The tank 65 is installed on the same height as the roof of the house 77, for example, by building a dedicated steel tower. A water storage pipe 69 including a tank pump 66 for pumping water from a water source (for example, a well or a river) is connected to the tank 65, and water is supplied into the tank 65 by the driving force of the tank pump 66. Is accumulated.

  In addition, the pump 5 is installed at a position lower than the tank 65, more specifically, on the floor 78 of the house 77, and the casing 27 is installed on the inner wall 79 of the house 77. The pump 5 and the casing 27 (more specifically, Specifically, the ozone mixer 7 (see FIG. 1) is connected by a raw water supply pipe 6.

  The suction pipe 4 extending downward from the inside of the tank 65 is connected to the pump 5, and one end of the purified water supply pipe 9 is connected to the casing 27 (more specifically, the ozone mixer 7 (see FIG. 1)). The other end of the purified water supply pipe 9 is connected to the inside of the tank 65 from above the tank 65.

  Therefore, the water in the tank 65 is a path (circulation flow path) of the tank 65 → the suction pipe 4 → the pump 5 → the raw water supply pipe 6 → the casing 27 → the purified water supply pipe 9 → the tank 65 by the driving force of the pump 5. ) Is circulated while being purified in the housing 27. Thus, since the water in the tank 65 is purified and circulated, the purified water can be stored in the tank 65. Moreover, since the pump 5 and the housing | casing 27 are each installed in the low position of the floor 78 and the inner wall 79, the user can perform operation operation and maintenance of the water purification apparatus 1 easily.

  The tank 65 is connected to one end of a user water supply pipe 67 that extends below the tank 65, bends in the middle and extends into the house 77, and a faucet 68 is provided at the other end of the user water supply pipe 67. Yes. Therefore, when the user uses water, for example, it is not necessary to provide a special device such as a pumping pump, and the user can use the water in the tank 65 only by a simple operation of opening the tap 68.

  Furthermore, when this water purification apparatus 1 is operated with solar energy, purified water is produced within daylight hours and is prepared for use at night.

In the second modification, the tank 65 is installed on a dedicated steel tower or the like, but may be installed on the roof of the house 77, for example. The water stored in the tank 65 is not limited to the water pumped up from the water source by the tank pump 66, and for example, rainwater can be stored in the tank 65. Furthermore, although the tank 65 is given as an example, if the water storage pipe 69 and the user water supply pipe 67 are omitted and the tank 65 is replaced with, for example, a pool or a bathtub, the water stored in the pool or the bathtub is stored. Therefore, clean water can be stored without regularly replacing water.
<Modification 3>
FIG. 16 is a system diagram illustrating a configuration example of an ozone water generation apparatus 70 according to the third modification. In addition, about the part which overlaps with FIG. 1 and FIG. 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted. In the system diagram of FIG. 16, the solid line arrows represent the flow of water, and the broken line arrows represent the flow of electricity.

  The ozone water generating apparatus 70 according to this modification 3 is discharged from the tank 65 for storing tap water, the pump 5 for sucking the water stored in the tank 65 through the suction pipe 4, and the pump 5. A water ozone mixing device 2 for mixing ozone with water sent through the raw water supply water pipe 6 and a purified water supply water pipe 9 for releasing ozone water generated by the water ozone mixing device 2 are provided. In the present invention, the purified water supply pipe 9 corresponds to an ozone water output pipe.

  More specifically, the water source 3 of the water purification apparatus 1 shown in FIG. 2 is replaced with a tank 65, and the ozone deodorizing column 10 is omitted. The tank 65 stores, for example, tap water. Therefore, the tap water stored in the tank 65 is mixed with ozone in the water ozone mixing device 2 and discharged from the purified water supply pipe 9 as ozone water having an excellent sterilizing / deodorizing function.

  In the water purification apparatus 1 shown in FIG. 2, the pump 5 is installed outside the housing 27. However, in the ozone water generation apparatus 70, the parts including the tank 65 and the pump 5 include, for example, the tire 71. It is accommodated in the attached movable casing 72, and the ends of the purified water supply pipe 9 and the intake pipe 22 are exposed from the movable casing 72. Therefore, when the user wants to use ozone water, the user can wash hands and feet with ozone water or water the ozone water by attaching a faucet or a shower nozzle to the end of the purified water supply pipe 9, for example. Can do.

Furthermore, when the movable casing 72 is used as described above, it can be easily carried. For example, after placing fresh fish on a loading platform such as a truck for transporting fresh fish, and then sprinkling water on the toro box that contains the fresh fish, the toro box can be disinfected, deodorized, or stripped. it can. In addition, the ozone water which a user uses is produced | generated by the method similar to the said Example 1. FIG.
<Modification 4>
(Ozone mixer)
FIG. 17 is a side sectional view of an ozone mixer 7 according to Modification 4. In FIG. 17, the solid line arrows represent the water flow, and the broken line arrows represent the gas flow. Also, the same parts as those in FIG.

  As shown in FIG. 17, it is desirable that the inlet 19 of the three-way branch 18 is directed obliquely upward. Further, it is desirable that the ozone generator 21 is disposed above the connection portion between the ozone supply pipe 24 (see FIG. 2) and the inlet 19.

As a result, even if the water in the water channel 14 that has entered the gas passage 16 through the outlet 20 reaches the inlet 19, the water generates ozone through the inlet 19 and the ozone supply pipe 24 (see FIG. 2). There is no risk of reaching the device 21 (see FIG. 2). Therefore, it is possible to reliably prevent the ozone generator 21 from being flooded, and to surely drain the water in the water channel 14 that has entered the gas passage 16 through the drain port 34 (see FIG. 5). it can.
(Check valve)
FIG. 18 is a view of the inside of the valve chamber 29 as viewed from below in the check valve 17 used in the ozone mixer 7 according to Modification 4. FIG. 19 is an upper perspective view of the arch valve 81 arranged in the valve chamber 29. FIG. 20 is an upper perspective view of the inside of the valve chamber 29 in a state where the arch valve 81 is arranged. FIG. 21 is an illustrative view of the check valve 17 according to the modified example 4. FIG. 21A shows a state when water is not flowing in the water channel 14 (hereinafter, referred to as normal time). (B) shows a state when water is flowing in the water channel 14 (hereinafter referred to as “at the time of suction”). In FIG. 21, broken line arrows indicate the flow of gas.

  In the check valve 17 according to the modified example 4, the valve chamber 29 has a divided structure. As shown in FIG. 17, the valve chamber 29 has an upper part 82 and a lower part 83 in order from the water channel 14 side. An arch valve 81 as a valve body is accommodated in the inside instead of the ball valve 30 and the spring 33 (see FIG. 4) described above.

  The upper part 82 is formed in a substantially hollow cylindrical shape, and its upper end is connected to the water channel 14. A thread portion is formed on the outer peripheral surface of the upper part 82. The hollow part of the upper part 82 has a substantially conical region (conical region 85) that tapers upward, and a substantially cylindrical region (cylindrical region 86) that continues downward from the conical region 85. )).

  More specifically, the upper end portion of the conical region 85 has a substantially cylindrical region extending upward (referred to as a small cylindrical region 87), and the throttle portion 15 of the water channel 14 extending upward from the upper end of the small cylindrical region 87. As shown in FIG. 18, a slit-like region (referred to as a slit region 88) that forms a rectangle in a bottom view is formed. In addition, as shown in FIG. 17, the connection part of the slit area | region 88 and the aperture | diaphragm | squeeze part 15 is the exit 20 mentioned above.

  As shown in FIG. 18, four protrusions 89 are provided on the inner peripheral surface of the upper part 82 at equal intervals on the periphery so as to surround the small cylindrical region 87 in a bottom view. Yes.

  Each projection 89 is formed in a substantially parallelogram-like thin plate shape that is long in the vertical direction (see FIG. 17), and the upper end portion is connected to the portion corresponding to the conical region 85 on the inner peripheral surface of the upper part 82. Has been. Further, the outer end of each protrusion 89 in the radial direction of the inner peripheral surface of the upper part 82 is connected to a portion corresponding to the cylindrical region 86 on the inner peripheral surface of the upper part 82. The lower end edge of each protrusion 89 is formed so as to incline downward in the middle after extending horizontally from the inside to the outside as seen in the radial direction of the inner peripheral surface of the upper part 82 described above. Hereinafter, the horizontally extending portion of the lower end edge of each protrusion 89 is referred to as a horizontal portion 90 and the inclined portion is referred to as an inclined portion 91.

  As shown in FIG. 17, the lower part 83 has a large diameter cylindrical portion 92 having a larger diameter than the upper part 82 and a large hollow cylindrical portion 92, and the inlet 31 (see FIG. 4) of the check valve 17 described above. It is integrally formed with a narrow tube 93 connected to the lower end of the diameter cylindrical portion 92 and extending downward.

  A threaded portion is formed on the inner peripheral surface of the large diameter cylindrical portion 92. The bottom wall (lower side wall) of the large-diameter cylindrical portion 92 is formed with an inlet 31 at the radial center, and a valve mounting surface 95 surrounding the inlet 31 is formed. The valve mounting surface 95 is formed in an annular shape in a plan view and flat in the horizontal direction, and a contact portion 96 that protrudes upward along the outer peripheral edge thereof is integrated with the valve mounting surface 95. Is formed.

  The thin tube 93 is connected to the drain pipe 35 (see FIG. 5) described above.

  As shown in FIG. 19, the arch valve 81 is formed in a substantially disk shape made of Teflon (registered trademark) or silicon rubber having excellent durability against ozone degradation, and has an upper surface (pressurized surface 99 and Is formed so as to be convexly curved upward, and the lower surface (referred to as sealing surface 100) is formed flat in the horizontal direction. The pressed surface 99 is integrally provided with an annular elastic convex portion 101 that protrudes upward in a plan view.

  When assembling such a check valve 17, first, as shown in FIG. 20, the arch valve 81 is mounted on the mounting surface 95 of the lower part 83. At this time, the sealing surface 100 of the arch valve 81 uniformly contacts the valve mounting surface 95 to seal the inlet 31. Then, the lower part 83 is assembled to the upper part 82 by screwing the screw part formed on the inner peripheral surface of the lower part 83 into the screw part formed on the outer peripheral surface of the upper part 82.

  In a state where the lower part 83 is assembled to the upper part 82, the lower part 83 is positioned with respect to the upper part 82 by fitting the contact portion 96 of the lower part 83 to the lower end portion of the inner peripheral surface of the upper part 82. Has been. In addition, on the outer side in the radial direction from the contact portion 96, the upper side surface of the bottom wall of the lower part 83 is pressed against the lower end face of the upper part 82 with no gap therebetween with the packing 102 interposed therebetween. Thus, the inside of the valve chamber 29 described above is evacuated from the outside by the hollow portion (the conical region 85 and the cylindrical region 86) of the upper part 82 and the valve mounting surface 95 and the contact portion 96 of the lower part 83. It is formed dense and liquid-tight.

  The arch valve 81 accommodated in the valve chamber 29 has a configuration in which the elastic convex portion 101 is slightly pressed downward by the horizontal portion 90 of each projection 89 of the upper part 82 as shown in FIG. Are arranged in a freely movable state in the valve chamber 29. That is, the arch valve 81 is not supported by another member in the valve chamber 29 (that is, the gas passage 16). Since the operation frequency of the arch valve 81 is relatively high in the use of the check valve 17, there is a possibility that the support portion may be damaged when supported by other members in the valve chamber 29. Since the arch valve 81 of the present invention is not supported by other members in the valve chamber 29, the above-described supporting portion does not exist, and there is no risk of damage.

  Further, since the elastic convex portion 101 of the arch valve 81 is surrounded by the inclined portion 91 of each projection 89 in the horizontal direction with a gap in the horizontal direction, the horizontal position of the arch valve 81 is prevented from being shifted by each projection 89. Has been. Therefore, the arch valve 81 can be always disposed in an appropriate position in the valve chamber 29 at a proper position where the sealing surface 100 can seal the inlet 31 (that is, the gas passage 16 described later can be opened and closed). The operational reliability of the valve 17 can be improved.

  In a state where the arch valve 81 is disposed in the valve chamber 29, the elastic convex portion 101 is pressed by the horizontal portion 90 of each protrusion 89 as described above in a normal state (see FIG. 21A). Accordingly, the arch valve 81 itself, specifically, the sealing surface 100 is urged toward the inlet 31. Further, the weight of the arch valve 81 is also exerted on the biasing of the sealing surface 100 toward the inlet 31. As a result, the inlet 31 is sealed by the sealing surface 100, and the gas passage 16 is blocked (closed). Therefore, even if water from the water channel 14 (see FIG. 17) enters the valve chamber 29, the water is blocked in the valve chamber 29.

  Specifically, as described above, the arch valve 81 has a pressurized surface 99 that is convexly curved upward. In this ozone mixer 7, due to its structure, there is a risk that water in the water channel 14 leaks downward into the gas passage 16 from the outlet 20 joined to the water channel 14 (see FIG. 17). 99 is assumed to be pressurized, but since the pressurized surface 99 is convexly curved upward, the pressurized surface 99 can release the pressure of water from the water channel 14 to the surroundings. For example, when the pressurized surface 99 is uniformly flat from the outer edge (radially outer side) to the inner center, the pressure of water from the water channel 14 cannot be released to the surroundings. Therefore, when the inner portion of the pressurized surface 99 cannot withstand the pressure, the entire arch valve 81 is bent and the arch valve 81 cannot completely close the gas passage 16 (that is, the sealing surface 100 and the inlet 31 of the valve chamber 29). There is a possibility that a back flow of water may occur. However, as described above, the pressurized surface 99 of the arch valve 81 of the present invention is convexly curved in the direction (upward) opposite to the direction in which water leaks out. Even if the pressure of the water that has risen is applied to the pressurized surface 99, the pressure is released to the surroundings, so that the arch valve 81 is not bent and can maintain its overall shape. Therefore, the arch valve 81 completely closes the gas passage 16 (that is, the sealing surface 100 seals the inlet 31 without a gap), and can reliably prevent the backflow of water. Note that the pressurized surface 99 does not have to be convexly curved as described above as long as it is formed so as to release the pressure of water that pressurizes the pressurized surface 99 to the surroundings.

  As described above, the elastic convex portion 101 of the pressed surface 99 is elastically deformed by being pressed by the projections 89 and biases the arch valve 81 so as to close the gas passage 16. For example, in the case of water of extremely low pressure as opposed to the water hammer phenomenon described above, this water is between the arch valve 81 closing the gas passage 16 and the gas passage 16 (specifically, the sealing surface There is a possibility that the air flows backward through a minute gap between 100 and the inlet 31. However, the elastic convex portion 101 is pressed by the projections 89 to urge the arch valve 81 so as to close the gas passage 16 (that is, urge the sealing surface 100 toward the inlet 31). Therefore, the above-mentioned minute gap is eliminated and water backflow can be reliably prevented.

  Therefore, the backflow of water can be reliably prevented by the elastic convex portion 101 and the pressurized surface 99 convexly curved upward regardless of the water pressure.

  In addition, the elastic convex portion 101 is pressed locally by each projection 89 (that is, at four positions on the circumference corresponding to each projection 89), so that the pressing force is concentrated and acts locally. Therefore, even with a small pressing force, it is easily elastically deformed, and the sealing surface 100 is urged toward the inlet 31 so that the gap between the sealing surface 100 and the inlet 31 can be reliably eliminated.

  On the other hand, at the time of suction, as shown in FIG. 21B, the arch valve 81 is sucked by negative pressure. As a result, the arch valve 81 rises upward against the urging force of the elastic convex portion 101 pressed by each protrusion 89, and the inlet 31 sealed by the sealing surface 100 is connected to the inside of the valve chamber 29. The gas passage 16 is completed (opened) through communication. Therefore, as in the case of the check valve 17 in FIG. 4B, the ozone generator 21 → the ozone supply pipe 24 → the inlet 19 of the three-way branch 18 → the path connected to the gas passage 16 is in communication, and ozone is It is supplied to the gas passage 16.

As described above, in the check valve 17 according to the modified example 4, the arch valve 81 opens the gas passage 16 by ozone supply pressure (the negative pressure described above) when ozone is supplied (see FIG. 21B). By doing so, as shown in FIG. 17, ozone supplied from the inlet 19 of the three-way branch 18 to the gas passage 16 can be allowed to pass upward toward the outlet 20. On the other hand, when ozone is not supplied (see FIG. 21A), the arch valve 81 closes the gas passage 16 by its own weight and the urging force of the elastic convex portion 101, so that the reverse direction of water (FIG. 21 ( Passing down (backward flow) in a) can be prevented. In other words, the check valve 17 having such a simple configuration can automatically open and close the gas passage 16 and prevent back flow of water without any other operation from the outside.
(Drain valve)
FIG. 22 shows the drain valve 36 extracted from FIG. 17, in which FIG. 22 (a) shows a normal state, FIG. 22 (b) shows a state during suction, and FIG. ) Indicates the state during drainage. In FIG. 22, the direction of the inlet 19 is shown in the direction opposite to the direction shown in FIG. FIG. 23 is an upper perspective view of the stopper 47 inside the valve chamber 38.

  In the drain valve 36 according to the modified example 4, as shown in FIG. 22, the inside of the valve chamber 38 as a storage chamber is formed in a cylindrical shape whose upper portion is convexly curved upward. Further, the above-described outlet 42 is formed in a circular shape at the center position of the bottom wall of the valve chamber 38. And the stopper 47 as a receiving member provided in the valve chamber 38 is similar to the internal shape of the valve chamber 38 in a side sectional view, and is formed to be convexly curved upward. Specifically, as shown in FIG. 23, the stopper 47 is configured by six pairs of ribs 105 provided radially on the bottom wall of the valve chamber 38 so as to surround the outlet 42. Each rib 105 is formed so that its upper surface gently descends toward the radially outer side of the outlet 42 (see FIG. 22). Hereinafter, the upper surfaces of all the ribs 105 are collectively referred to as the receiving surface 103. To do. That is, the receiving surface 103 forms the convex curved portion of the stopper 47 described above. A drain groove 104 is formed between the pair of ribs 105.

  As shown in FIG. 22, the disc valve 46 as a blocking member is made of a flexible material. Normally, as shown in FIG. 22A, the receiving surface 103 is inside the valve chamber 38. It is received by a stopper 47 so as to be placed on top. In this state, the peripheral edge of the disc valve 46 is in contact with or close to the inner wall of the valve chamber 38 with a gap of, for example, less than 1 mm, preferably about 0.3 mm.

  At the time of suction, as shown in FIG. 22 (b), the disc valve 46 is sucked by negative pressure and the inlet 40 is closed, so that the drain pipe 35 is shut off as in the first embodiment (see FIG. 22B). 6 (b)). At this time, the disc valve 46 is bent so as to follow the above-described top surface shape of the internal shape of the valve chamber 38. Here, at the position on the inner peripheral surface of the drain pipe 35 close to the inlet 40, three separation prevention ribs 106 are equally spaced on the same circumference so as to protrude toward the center of the drain pipe 35. These detachment prevention ribs 106 prevent the disk valve 46 from being sucked into the drain pipe 35 at the time of suction.

  As described above, in the drain valve 36, the disk valve 46 is in contact with or close to the inner wall of the valve chamber 38 in the normal state shown in FIG. There are almost no gaps (corresponding to the gaps 48 in FIG. 6) communicating with 42. However, since the receiving surface 103 on which the disc valve 46 is placed is convexly curved upward, the peripheral side (the portion of the upper surface of each rib 105 away from the outlet 42) is the center side (each rib 105). (The portion on the outlet 42 side of the upper surface) of the upper surface of the inner surface of the valve chamber 38, and a clearance can be secured between the receiving surface 103 and the inner wall of the valve chamber 38 in the peripheral portion. Therefore, at the time of draining shown in FIG. 22 (c), the water flowing into the valve chamber 38 from the inlet 40 presses the disc valve 46, so that the peripheral portion of the disc valve 46 bends in the gap described above. Thereby, the contact between the inner wall of the valve chamber 38 and the disc valve 46 is eliminated, and the gap 48 described above is formed between the inner wall of the valve chamber 38 and the disc valve 46. As a result, the inlet 40 and the outlet 42 communicate with each other and the drain pipe 35 is opened, so that the water that has flowed into the valve chamber 38 passes through the drain grooves 104 and reaches the outlet 42. It is drained through.

  That is, according to the drain valve 36 according to the modified example 4, the disk valve 46 is in contact with or close to the inner wall of the valve chamber 38 during normal times (except during draining and during suction). Even when the pressure change in the drain pipe 35 (the negative pressure described above) is small, it can operate reliably, block the inlet 40 and shut off the drain pipe 35, and reliably prevent the inflow of air from the outside. .

  Further, the disc valve 46 has flexibility, and when draining, the gap 48 described above is formed between the inner wall of the valve chamber 38 and the disc valve 46 by being pressed and bent by the flowing water. Since the drain pipe 35 is opened by the formation of, smooth drainage through the drain pipe 35 can be ensured.

  In the receiving surface 103 that is convex upward in the direction opposite to the direction in which water flows out during drainage (outflow direction), the peripheral side of the receiving surface 103 is downstream in the water outflow direction compared to the center side ( Therefore, a gap can be secured between the receiving surface 103 and the inner wall of the valve chamber 38 at the peripheral edge portion. Therefore, at the time of drainage, the disc valve 46 can be bent in this gap until the contact between the inner wall of the valve chamber 38 and the disc valve 46 is eliminated, and the drain pipe 35 can be reliably opened.

  The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims. For example, the configuration of the water ozone mixing device 2, the water purification device 1, or the ozone water generating device 70 according to the present invention may be used for a bath water purification process in a washing machine that performs washing using bath water. it can.

  Moreover, although the ozone mixer 7 of the structure which mixes ozone with water was illustrated in the present Example, not only this but this ozone mixer 7 can be used as a general purpose gas-liquid mixer. And the check valve 17 using the arch valve 81 shown in the modified example 4 is not limited to the ozone mixer 7, the water ozone mixing device 2, the water purification device 1, and the ozone water generating device 70 according to the present invention. It can be applied to all mechanisms that need to prevent backflow.

It is a schematic perspective view of the water purification apparatus 1 which concerns on one Embodiment of this invention. 1 is a system diagram illustrating a configuration example of a water purification device 1. FIG. It is an illustration figure of the ozone mixer 7. FIG. FIGS. 4A and 4B are illustrations of the check valve 17. FIG. 4A shows a normal state, and FIG. 4B shows a state during suction. FIG. 5A is an illustrative view showing an example of a drain valve 36, FIG. 5A shows a normal state, and FIG. 5B shows a suction state. FIG. 6A is an illustrative view showing an example of a drain valve 36, FIG. 6A shows a normal state, and FIG. 6B shows a suction state. It is a block diagram which shows the electric constitution of this water purification apparatus 1, Comprising: It is the figure which showed the part relevant to this invention. It is a flowchart which shows the control action of the control part 49 regarding the purification water supply of the water purification apparatus 1. FIG. It is a flowchart which shows the control action of the control part 49 regarding the water leak abnormality detection of the water purification apparatus. It is a schematic perspective view of the water purification apparatus 1 which concerns on the modification 1 of this invention. It is a system diagram which shows the structural example of the water purification apparatus 1 which concerns on the modification 1. It is a schematic plan view of the operation display part 55 of the water purification apparatus 1 which concerns on the modification 1. FIG. FIG. 9 is a block diagram showing an electrical configuration of a water purification apparatus 1 according to Modification 1 and shows portions related to Modification 1; It is a flowchart which shows the control action of the control part 49 regarding the purification water supply of the water purification apparatus 1 which concerns on the modification 1. FIG. It is a system diagram which shows the structural example of the water purification apparatus 1 which concerns on the modification 2. It is a system diagram which shows the structural example of the ozone water generating apparatus 70 which concerns on the modification 3. It is a sectional side view of the ozone mixer 7 which concerns on the modification 4. In the check valve 17 used with the ozone mixer 7 which concerns on the modification 4, it is the figure which looked at the valve chamber 29 inside from the downward direction. 3 is an upper perspective view of an arch valve 81. FIG. It is an upper side perspective view inside the valve chamber 29 in the state where the arch valve 81 is arranged. FIGS. 21A and 21B are illustrations of a check valve 17 according to a fourth modification, in which FIG. 21A shows a normal state and FIG. 21B shows a state during suction. The drain valve 36 in FIG. 17 is extracted and shown, in which FIG. 22 (a) shows a normal state, FIG. 22 (b) shows a state during suction, and FIG. 22 (c) shows a state during drainage. Shows the state. FIG. 4 is an upper perspective view of a stopper 47 inside the valve chamber 38.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water purification apparatus 2 Water ozone mixing apparatus 4 Suction pipe 5 Pump 6 Raw water supply pipe 7 Ozone mixer 8 Ozone supply apparatus 9 Purified water supply pipe 10 Ozone deodorizing column 12 Inlet 13 Outlet 14 Water path 15 Restriction part 16 Gas path 17 Reverse Stop valve 18 Three-way branch 19 Inlet 20 Outlet 21 Ozone generator 24 Ozone supply pipe 27 Housing 29 Valve chamber 31 Inlet 34 Drain port 35 Drain pipe 36 Drain valve 37 Water tray 38 Valve chamber 40 Inlet 42 Outlet 45 Water leak sensor 46 Disc valve 47 Stopper 48 Clearance 49 Control unit 61 Open / close valve 65 Tank 69 Water storage pipe 81 Arch valve 89 Projection 99 Pressurized surface 100 Sealing surface 101 Elastic convex portion 103 Receiving surface

Claims (30)

A water inlet at one end, a water outlet at the other end, a water channel connecting the inlet and the outlet, a gas inlet at one end, a gas outlet at the other end, and the gas outlet A gas-liquid mixer having a gas passage joined in the middle of the water channel;
An ozone supply device that generates ozone and supplies the generated ozone from the gas inlet to the gas passage;
A drainage channel for draining water flowing out of the gas passage when water in the water channel enters from the gas outlet and flows through the gas passage;
An air inflow suppression means for suppressing air from flowing in a direction opposite to the direction in which water flows out of the drainage channel during ozone supply to the gas channel, provided in the drainage channel. A water ozone mixing device. The gas-liquid mixer is
Having a squeezed portion that is squeezed in the middle of the waterway,
The water ozone mixing device according to claim 1, wherein the gas outlet is joined to the throttle portion. The air inflow suppression means is
The water ozone mixing device according to claim 2, wherein the water ozone mixing device is operated by a pressure change in the drainage channel which is changed by sucking ozone into the throttle portion. The air inflow suppression means is
A storage chamber that has an inlet at one end and an outlet at the other end, and is inserted in the middle of the drainage channel by connecting the inlet and the outlet to the drainage channel,
A blocking member that is accommodated in the storage chamber, has flexibility, and blocks the drainage path by closing the inlet by a pressure change in the drainage path that changes when ozone is sucked into the throttle portion. Including
Except when water flows out of the drainage channel and when ozone is sucked into the throttle part, the blocking member is in contact with or close to the inner wall of the storage chamber,
When water flows out of the drainage channel, the drainage channel is opened by being pressed by the flowing water and bending the blocking member, thereby forming a gap between the inner wall of the storage chamber and the blocking member. The water ozone mixing device according to claim 3, wherein the water ozone mixing device is provided.   The water / ozone mixing device according to claim 4, wherein the water / ozone mixing device according to claim 4, wherein the water / ozone mixing device includes a receiving member that is provided in the storage chamber, has a receiving surface that is convexly curved in the opposite direction, and receives the blocking member on the receiving surface. .   The gas passage is provided with a check valve for preventing the passage of water in the reverse direction while allowing the passage of gas from the gas inlet to the gas outlet. Item 6. The water ozone mixing device according to any one of Items 1 to 5. The gas passage is provided with a three-way branch branched into a drainage opening that opens downward and the gas inlet that opens laterally,
The ozone supply device is provided above the three-way branch with respect to the arrangement in the space, and an ozone generator that generates ozone by discharging,
An ozone supply path for sending ozone generated by the ozone generator to the gas inlet,
The water ozone mixing device according to any one of claims 1 to 6, wherein the drainage channel communicates with the drainage opening. The three-way branch gas inlet faces obliquely upward,
The water ozone mixing device according to claim 7, wherein the ozone generator is disposed above a connection portion between the ozone supply path and the gas inlet.   The drainage channel is configured such that the drainage amount per fixed time of the drainage channel is equal to or greater than the amount of water per fixed time entering the gas passage from the gas outlet. The water ozone mixing apparatus in any one of 8. A water detection sensor for detecting water drained from the drainage channel;
The water ozone mixing device according to any one of claims 1 to 9, further comprising ozone supply control means for stopping the ozone supply device in response to detection by the water detection sensor.   The water / ozone mixing apparatus according to claim 10, wherein the water detection sensor is provided on a downstream side of the air inflow suppression unit in a direction in which water flows out in the drainage channel. A water receiving portion for receiving water flowing out from the outlet of the drainage channel;
The water / ozone mixing according to claim 10 or 11, wherein the water detection sensor is a sensor for detecting the amount of water accumulated in the water receiving portion provided in association with the water receiving portion. apparatus. A water supply channel for guiding water to the inflow port;
The water ozone mixing device according to any one of claims 1 to 12, further comprising an on-off valve provided in the water supply channel for opening and closing the water supply channel. A pump for sucking and discharging water from the water source;
The water ozone mixing device according to any one of claims 1 to 13, which is connected to a discharge side of the pump, and purifies water by mixing ozone with discharged water.
A water purification apparatus comprising: a purified water supply channel that outputs water purified by mixing ozone with the water ozone mixing apparatus.   The water purification apparatus according to claim 14, wherein an ozone decomposition apparatus for removing ozone remaining in the purified water is provided in the purified water supply channel.   The water purification apparatus according to claim 14 or 15, further comprising a control device that controls the operation of the pump and the operation of the ozone supply device in an interlocked manner.   The water purification device according to claim 16, wherein the control device controls the pump and the ozone supply device in conjunction with each other based on a water pressure on a discharge side of the pump. The water source is a water tank for storing water;
The water purification apparatus according to any one of claims 14 to 17, further comprising a circulation channel for supplying water flowing out from the outlet into the water storage tank. A tank for storing water,
A pump for sucking and discharging the water stored in the tank;
The water ozone mixing device according to any one of claims 1 to 13, which is connected to a discharge side of the pump and mixes ozone with discharged water.
An ozone water generation device comprising: an ozone water output pipe for ejecting ozone water mixed with ozone by the water ozone mixing device. A water inlet at one end, a water outlet at the other end, a water channel connecting the inlet and the outlet, a gas inlet at one end, a gas outlet at the other end, and from the gas inlet A gas-liquid mixer having a gas passage that extends upward toward the gas outlet and the gas outlet is joined in the middle of the water channel;
An ozone supply device that generates ozone and supplies the generated ozone from the gas inlet to the gas passage;
A check valve provided in the gas passage for allowing passage of ozone from below to above from the gas inlet to the front gas outlet, but preventing passage of water in the reverse direction,
The check valve includes a valve body that opens the gas passage by ozone supply pressure when ozone is supplied and closes the gas passage by its own weight when ozone is not supplied.   21. The water-ozone mixing apparatus according to claim 20, wherein the valve body is accommodated in a free state in which the valve body can move up and down and has an upper surface that is convexly curved upward.   The water / ozone mixing apparatus according to claim 21, wherein a protrusion contacting the upper surface of the valve body is provided in the gas passage to prevent the position of the valve body from shifting. In a gas-liquid mixer having a liquid flow path and a gas passage extending upward from below in order to mix gas with the liquid flowing through the liquid flow path,
A valve chamber formed in the gas passage, and the gas passage is accommodated in a free state in the valve chamber, and by the supply pressure and the dead weight when the gas is supplied to the liquid passage through the gas passage. A gas-liquid mixer comprising a check valve including a valve body that can be opened and closed.   The gas-liquid mixer according to claim 23, wherein the valve body has an upper surface convexly curved upward. In the valve chamber, in order to prevent the position of the valve body from shifting, a protrusion in contact with the upper surface of the valve body is provided,
The upper surface of the valve body is provided with an elastic protrusion that protrudes upward and is elastically deformed by being pressed by the protrusion to urge the valve body so as to close the gas passage. The gas-liquid mixer according to claim 23 or 24, wherein:   The gas-liquid mixer according to claim 25, wherein the elastic convex portion is locally pressed. Opening the fluid passage hole for allowing the fluid to pass allows the passage of the fluid in one direction, but sealing the fluid passage hole prevents the passage of the fluid in the reverse direction. A valve,
A valve body having a sealing surface that seals the fluid passage hole when blocking the passage of fluid in the reverse direction and a pressurized surface that is pressurized by the fluid that is going to move in the reverse direction; Including
The pressurized surface is convexly curved in the one direction,
The pressed surface is provided with an elastic protrusion that protrudes in the one direction and is elastically deformed by being pressed from the one direction side to urge the sealing surface toward the fluid passage hole. A check valve characterized by that. Opening the fluid passage hole for allowing the fluid to pass allows the passage of the fluid in one direction, but sealing the fluid passage hole prevents the passage of the fluid in the reverse direction. A valve,
A valve body having a sealing surface that seals the fluid passage hole when blocking the passage of fluid in the reverse direction and a pressurized surface that is pressurized by the fluid that is going to move in the reverse direction; Including
The pressurized surface is formed to release the pressure of the fluid that pressurizes the pressurized surface to the surroundings,
The pressed surface is provided with an elastic protrusion that protrudes in the one direction and is elastically deformed by being pressed from the one direction side to urge the sealing surface toward the fluid passage hole. A check valve characterized by that.   The check valve according to claim 27 or 28, wherein the elastic convex portion is locally pressed.   30. The check valve according to claim 27, wherein the valve body is housed in a free state in a valve chamber in which the fluid passage hole is formed.

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