JP2000225059A - Purification water heater - Google Patents

Abstract

(57) [Abstract] [Problem] For drinking water by purifying and heating tap water,
Provided is a purification water heater that can supply delicious hot water suitable for cooking and the like and that is easy to handle. SOLUTION: Tap water is supplied from a water supply port, reaches a heat exchange tube 3 via a water supply valve 1 and a water purifier 2, where it is heated to become hot water and supplied from a hot water tap 4. The fuel gas is supplied from a gas supply port to a gas burner 6 via a gas shutoff valve 5, burns in a combustion chamber 7, and uses the heat to heat tap water through a heat exchange tube 3, and exhaust gas. Is more exhausted. At the stage of passing through the water purifier 2, the tap water is not heated, so the water purifier 2 is of the same type as a known tap water purifier containing, for example, a polymer membrane, activated carbon, or the like in a cartridge. be able to.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to purification of tap water which is used as raw water, and purifying and heating the tap water to supply a delicious hot water suitable for drinking, cooking and the like, and which is easy to handle. It relates to a water heater.

[0002]

2. Description of the Related Art In ordinary tap water, bacteria, algae and the like are not contained after being sterilized and filtered in a water purification plant. But,
Chlorine injected to maintain the disinfection effect after leaving the water treatment plant and contaminants entering from pipes and water receiving tanks are reducing the taste of water. For this reason, tap water has recently become less common for drinking, and these contaminants contained in the water are purified through a water purifier, which is a cartridge filled with hollow fiber membranes, activated carbon, and the like. The method of using is becoming widespread.

[0003]

On the other hand, instantaneous water heaters and hot water heaters are generally used as equipment for supplying hot water for home use. However, hot water supplied from these devices uses tap water as it is, and therefore is rarely used as drinking water as it is for the above-described reasons. As a method for obtaining delicious hot water, it is necessary to boil the water purified by the water purifier as described above in another water heater, and there is a problem that it takes time and effort to make hot water.

As a countermeasure against this, it is conceivable to use hot water supplied from an instantaneous water heater or a storage hot water heater by purifying it with a water purifier. It could not be used for warm water and this was not possible.

The present invention has been made in view of such circumstances, and it is possible to supply delicious water suitable for drinking, cooking and the like by using tap water as raw water and purifying and heating the tap water. Another object of the present invention is to provide a purified water heater that is easy to handle.

[0006]

A first means for solving the above-mentioned problems is a water heater which supplies tap water introduced as a hot water by heating a tap water introduced through a water supply pipe by a heating unit. Purification water heater (Claim 1), wherein a water purification means is provided in a passage of tap water provided in front of the section.

[0007] In this means, solid matter such as iron rust and trash in tap water is removed by water purification means provided in front of the heating section.
Organic substances such as chlorine and trihalomethane are removed. At this stage, since the tap water is not heated, the performance of the water purification means does not decrease. By heating the purified tap water in the heating unit, a delicious hot water suitable for drinking, cooking, and the like can be obtained.

[0008] A second means for solving the above-mentioned problems is the first means, comprising a hot water tank for storing heated tap water and controlling the amount of tap water supplied to the hot water tank. A water supply valve is provided (claim 2).

In this means, a desired amount of hot water can be stored in the hot water storage tank by automatically or manually controlling the water supply valve. Since the hot water storage tank is provided, the residence time at high temperature of tap water heated to high temperature can be lengthened, and a further sterilization effect can be expected. Further, even if a large amount of hot water is used, the temperature of the hot water does not drop.

[0010] A third means for solving the above problems is as follows.
In the second means, the heating unit for heating tap water,
The present invention is characterized in that it is integrated with the hot water storage tank (claim 3).

According to this means, the size and cost of the equipment can be reduced. Moreover, since the hot water stored in the hot water storage tank can be directly heated, the time for heating can be lengthened, and high-temperature hot water can be obtained with a heat source having a small calorific value.

A fourth means for solving the above-mentioned problem is as follows.
The second or third means, further comprising a water level detecting means for detecting a water level of the hot water tank (Claim 4).

In this means, a human can visually recognize the water level of the hot water tank and adjust the water supply valve to set the water level to a desired value.

A fifth means for solving the above-mentioned problems is as follows.
The fourth means is provided with a water level adjusting means for adjusting the water level of the hot water storage tank to a predetermined value or less, a predetermined value, or within a predetermined range (Claim 5).

In this means, the water level adjusting means
When the water level in the water storage tank reaches a predetermined value, close the water supply valve,
When the water level of the hot water tank is kept below a predetermined value, the water supply valve is controlled so that the water level of the water storage tank keeps a predetermined value, or when the water level of the water storage tank becomes higher than a first predetermined value (high level). By closing the water supply valve and opening the water supply valve when it falls below the second predetermined value (low level), the water level of the water storage tank can be maintained in a predetermined range. Since these operations are performed automatically, human operations are simplified.

A sixth means for solving the above-mentioned problem is as follows.
Any of the second means to the sixth means, further comprising a temperature adjusting means for keeping the temperature of the hot water in the hot water storage tank at a predetermined value (claim 6). . In this means, the temperature of the hot water supplied can be set to a desired temperature.

[0017] A seventh means for solving the above problems is as follows.
The sixth means is provided with a time limiter for setting an operation time of the temperature adjusting means (claim 7).

In the present means, since the heat retention time can be arbitrarily set, unnecessary heat retention is not performed, and energy saving can be realized.

Eighth means for solving the above-mentioned problem is:
Any one of the second means to the seventh means, further comprising means for boiling the hot water in the hot water storage tank at predetermined time intervals (claim 8). In this means, since the hot water in the hot water tank is heated by boiling every predetermined time, the quality of the hot water in the hot water tank can be maintained.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a first example of an embodiment of the present invention, and shows a cross-sectional view. In FIG. 1, 1 is a water supply valve, 2 is a water purifier, 3 is a heat exchange tube, 4
Is a hot water tap, 5 is a gas shutoff valve, 6 is a gas burner, 7 is a combustion chamber, and 8 is a control / power supply unit.

Tap water is supplied from a water supply port, reaches a heat exchange tube 3 via a water supply valve 1 and a water purifier 2, is heated there to become hot water, and is supplied from a hot water tap 4. The fuel gas is supplied from a gas supply port to a gas burner 6 via a gas shutoff valve 5, burns in a combustion chamber 7, and uses the heat to heat tap water through a heat exchange tube 3, and exhaust gas. Is more exhausted.

As the water purifier 2, for example, the same type as a known water purifier for tap water containing a polymer membrane, activated carbon and the like in a cartridge can be used. In the present embodiment, the water supply valve 1 is a manual flow control valve, and a needle valve or the like is used.

When the cock of the hot water tap 4 is opened, water is supplied from the water inlet, and the pressure switch (not shown) detects that the pressure in the vicinity of the hot water tap 4 has fallen, and informs the control / power supply section 8. Can be The control / power supply unit 8 receives this signal, activates an ignition mechanism (not shown), and opens the gas cutoff valve 5 to supply fuel gas to the gas burner 6. Thereby, the gas burner 6 burns in the combustion chamber 7 and heats the tap water in the heat exchange tube 3.

When the fuel gas amount adjusting mechanism is not provided, the temperature of the hot water can be controlled by adjusting the opening of the water supply valve 1. Also, a manual gas flow control valve, such as that provided in a normal instantaneous gas water heater, is added to the one shown in FIG. 1 so that the amount of combustion can be adjusted by adjusting the opening of the valve. You may. In this way, the flow rate of hot water and the temperature of hot water can be adjusted separately. Also, like a normal instantaneous water heater,
The gas cutoff valve 5 may be directly driven by a mechanical pressure switch or flow switch without providing the control / power supply unit 8, and the gas cutoff valve 5 may be opened when hot water is supplied.

In such an embodiment, solids such as iron rust and dust and organic substances such as chlorine and trihalomethane in tap water are removed. Since the tap water is not heated at this stage, the performance of the water purifier does not decrease. By heating the purified tap water, a delicious hot water suitable for drinking, cooking, etc. can be instantaneously obtained.

FIG. 2 is a sectional view showing a schematic diagram of a second example of the embodiment of the present invention. In the following drawings, the same components as those shown in the preceding drawings are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 2, 9 is a hot water storage unit, 10 is a partition, 11 is an exhaust pipe, 12 is a water level gauge, and 13 is a thermometer. The embodiment shown in FIG. 2 is significantly different from the embodiment shown in FIG. 1 in having a hot water storage section 9. The water supply valve 1 is an open / close valve that operates automatically.

When the water level in the hot water storage section 9 measured by the water level gauge 12 is equal to or less than a predetermined value, the control / power supply section 8 opens the water supply valve 1. As a result, the tap water is supplied from the water supply port to the water purifier 2 via the water supply valve 1, and the tap water passing through the water purifier 2 enters the hot water storage unit 9. When the water level gauge 12 detects that the water level in the hot water storage section 9 has reached a predetermined value, the control / power supply section 8 closes the water supply valve 1. The format of the water purifier 2 is
It is the same as that shown in FIG.

On the other hand, the temperature of hot water in hot water storage section 9 is measured by thermometer 13.
Is detected by When the temperature is lower than the predetermined temperature, the control / power supply unit 8 activates an ignition mechanism (not shown) and opens the gas cutoff valve 5 to supply fuel gas to the gas burner 6. As a result, the gas burner 6 burns, and the exhaust gas is discharged from the exhaust port through a cylindrical exhaust pipe 11 provided to penetrate the hot water storage section 9. Heat exchange is performed through the burner chamber and the exhaust pipe 11 and the partition wall of the hot water storage section 9, and the tap water in the hot water storage section 9 is heated. Then, when the temperature of the hot water detected by the thermometer 13 reaches the set temperature, the control / power supply unit 8 closes the gas cutoff valve 5. The partition 10 is provided to prevent fresh water from flowing directly to the hot water tap 4 without being heated.

As the water level gauge 12, for example, a commercially available one such as a float type level switch or an electrode type level switch can be used. When it is desired to change the set water level, an analog type level meter can be used. As a method of water level setting, a method of starting water supply manually (such as a push button) and automatically stopping water supply when the set water level is reached (semi-automatic),
Method of starting water supply immediately when the water level is lower than the set water level, and terminating water supply when the water level is higher than the set water level (constant level control), when the water level is higher than the first set level (high level) A method of stopping the water supply and starting the water supply when the water level falls below the second set level (low level) (control within a certain range) can be considered.

As the thermometer 13, a thermostat made of, for example, a bimetal may be used to perform on / off control, or a temperature may be detected in an analog manner using a thermistor or the like, and a temperature set point (operation not shown) may be used. (Set from the panel) may be arbitrarily changed.

It is desirable to provide a small hole in the upper part of the hot water storage unit 9 in order to drive out residual air when tap water is supplied into the hot water storage unit 9. Also, in order to prevent the water level in the hot water storage unit 9 from becoming too high due to some trouble, an overflow pipe with an open upper part is provided inside the hot water storage room 9. Is preferably allowed to flow into the overflow pipe and be discharged to the outside.

In this embodiment, hot water can be stored in the hot water storage section 9 in advance, so that a large amount of hot water can be
And the tap water in the hot water storage section 9 can be heated over time, so that the capacity of the gas burner 6 can be reduced and hot water can be obtained. Have.

In order to simplify the apparatus, the water level gauge 1
2 is a visual type (for example, a glass tube type), and the water supply valve 1 is a manual type (an electromagnetic valve that can be turned on / off by a push button, or a manual valve that can be turned on / off by a cock). The supply of tap water may be performed so that the water level becomes appropriate.

Usually, while the operation switch provided on the operation panel (not shown) is turned on, the temperature of the hot water in the hot water storage tank is controlled. If the time to keep the value can be limited,
A timer may be provided in the power supply unit 8, and the hot water temperature adjustment may be performed only within the timer set time set from the operation panel. Furthermore, in order to maintain the quality of the hot water in the hot water storage section 9, it is effective to form a sequence in which the water is boiled and heated every certain time.

FIG. 3 shows a schematic diagram of a third example of the embodiment of the present invention. In FIG. 3, reference numeral 14 denotes a heat exchange unit. FIG. 3A is an end view along BB ′, and FIG. 3B is a cross-sectional view along AA ′. This embodiment is different from the embodiment shown in FIG. 2 only in the method of heating the hot water storage unit 9, and therefore the description of the same parts as those in the embodiment shown in FIG. 2 is omitted. Only different parts will be described.

In this embodiment, the combustion chamber 7 is provided along the wall on one side of the hot water storage unit 9 so as to penetrate through the hot water storage unit 9, and the gas burner 6 is burned therein. Further, a cylindrical heat exchange section 14 is provided to penetrate through the combustion chamber 7, and the inside of the cylinder is open to the hot water storage section 9. Therefore, the tap water in the hot water storage section 9 is heated through the combustion chamber 7 and the partition wall of the hot water storage section 9 and the heat exchange section 1 is heated.
4 is also heated through the outer wall. The reason why the heat exchange unit 14 is installed obliquely is that the water in the hot water storage unit 9 flowing into the heat exchange unit 14 moves by convection, so that heating is performed efficiently. It is preferable to attach fins to the outside of the heat exchange section 14, since heat exchange is performed more efficiently.

In the embodiment shown in FIGS. 2 and 3, the heating section and the hot water storage section are formed integrally, and the water in the hot water storage section can be directly heated by the gas burner. The heating unit and the hot water storage unit may be provided separately, but by integrating them, the overall structure is simplified and the temperature of the hot water stored in the hot water storage unit can be directly controlled. If not integrated, hot water must be circulated between the heating unit and the hot water storage unit in order to control the temperature of the hot water in the hot water storage unit. Become.

FIG. 4 shows an installation example of the purifying water heater according to the embodiment of the present invention shown in FIGS. In FIG. 4, 21 is a gas / sink, 22 is a gas stove, 23 is a gas tap, 24 is a kitchen tap, 25 is a purification water heater, 26 is a gas supply pipe, 27 is a water supply pipe, 28 is a tap water tap, 29
Denotes a purification water heater faucet (hot water tap), 30 denotes a main tap from another instantaneous water heater, and 31 denotes a water tap.

The purifying water heater 25 is a wall-mounted type, and is designed to reduce the installation space. A water supply pipe 27 to the purifying water heater 25 is branched from a tap water main plug 28 and connected to simplify installation and construction work. The gas pipe 26 is branched from the gas main plug 23 of the gas stove 22. With such an installation layout, the purified hot water produced by the main purifying water heater 25 can be directly poured into a pot on a gas stove from the rotary purifying water heater faucet 29. As a result, labor is reduced as compared with the conventional cooking operation of pouring purified water from a general water tap-connected household water purifier into a pot and applying the purified water to a gas stove. In addition, this purification water heater 25
Because of its high thermal efficiency of 70-80%, it has the advantage that it consumes less fuel (gas) than boiling water on a gas stove.

In the above description of the embodiment, it has been described that the heating heat source of the purifying water heater is a gas. From the viewpoint of rapid heating and thermal efficiency, it is most preferable to use a gas as a heating heat source. However, the present invention is not limited to a heating heat source that is a gas. The present invention is also applicable to those using heating.

[0041]

As described above, in the invention according to claim 1 of the present invention, the solid matter such as iron rust and trash in tap water, chlorine, Since organic substances such as trihalomethane are removed, it is possible to obtain a delicious hot water suitable for drinking, cooking and the like.

In the invention according to the second aspect, the residence time of the hot water stored in the hot water storage tank can be extended, so that
Bactericidal effect increases. Further, even if a large amount of hot water is used, the temperature of the hot water does not drop.

According to the third aspect of the present invention, since the heating section for heating tap water is formed integrally with the hot water storage tank, it is possible to reduce the size and cost of the equipment. In addition, high-temperature hot water can be obtained even with a heat source having a small calorific value.

In the invention according to the fourth aspect, since the water level detecting means for detecting the water level of the hot water tank is provided, a human can visually recognize the water level of the hot water tank and adjust the water supply valve to thereby adjust the water level. Can be set to a desired value.

According to the fifth aspect of the present invention, since the water level adjusting means is provided, human operation is simplified.

According to the sixth aspect of the present invention, the temperature of the hot water supplied can be set to a desired temperature because the temperature adjusting means for maintaining the temperature of the hot water in the hot water storage tank at a predetermined value is provided.

According to the seventh aspect of the present invention, since a time limiter for setting the operation time of the temperature adjusting means is provided,
Heating for useless heat retention is not performed, and energy saving can be realized.

In the invention according to claim 8, since the hot water in the hot water tank is heated by boiling every predetermined time, the quality of the hot water in the hot water tank can be maintained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first example of an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a second example of the embodiment of the present invention.

FIG. 3 is a schematic diagram showing a third example of the embodiment of the present invention.

FIG. 4 is a diagram showing an installation example of a purification water heater according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Water supply valve, 2 ... Water purifier, 3 ... Heat exchange tube, 4 ... Hot water tap, 5 ... Gas shut-off valve, 6 ... Gas burner, 7 ... Combustion chamber, 8 ... Control / power supply unit, 9 ... Hot water storage unit, 10 ... partition walls, 11
... exhaust pipe, 12 ... water level gauge, 13 ... thermometer, 14 ... heat exchange section, 21 ... gas / sink, 22 ... gas stove, 23 ... gas faucet, 24 ... kitchen faucet, 25 ... purification water heater, 26 ... gas Piping, 27 ... Water supply pipe, 28 ... Tap water tap, 29 ... Purification water heater faucet (hot water tap), 30 ... Tap from other instantaneous water heater, 31 ... Water tap

Continued on the front page F term (reference) 3L034 BA23 BB03 BB04 CA02 DA03 4B055 AA32 BA27 BA35 BA56 BA61 CA61 CA64 CA67 CA71 CA73 CA75 CB04 CB09 CB13 CB20 CC21 CC28 CC52 CC58 CC66 CD15 DA02 DB08 EA03 EA10 FA14 FB12 GB01 GC01 GB01 4D034 AA11 CA01 CA06 CA21

Claims (8)

[Claims] 1. A water heater that heats tap water introduced through a water supply pipe by a heating unit and supplies it as hot water, wherein a water purification unit is provided in a passage of tap water provided in front of the heating unit. A purifying water heater characterized by being used. 2. The purifying water heater according to claim 1, wherein:
A purifying water heater comprising: a hot water tank for storing heated tap water; and a water supply valve for controlling an amount of tap water supplied to the hot water tank. 3. The purifying water heater according to claim 2, wherein:
A purifying water heater, wherein a heating unit for heating tap water has an integral structure with the hot water storage tank. 4. The purifying water heater according to claim 2, further comprising a water level detecting means for detecting a water level in the hot water storage tank. 5. The purification water heater according to claim 4, wherein:
A purifying water heater comprising a water level adjusting means for adjusting the water level of the hot water tank to a predetermined value or less, a predetermined value, or within a predetermined range. 6. One of claims 2 to 5
The purifying water heater according to any one of the preceding claims, further comprising a temperature adjusting means for maintaining a temperature of hot water in the hot water storage tank at a predetermined value. 7. The purifying water heater according to claim 6, wherein:
A purifying water heater comprising a time limiter for setting an operation time of the temperature adjusting means. 8. One of claims 2 to 7
The purifying water heater according to any one of the preceding claims, further comprising means for boiling the hot water in the hot water tank at predetermined time intervals.