JP2018001144A - Washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive washing device having a function of preventing liquid drip from a nozzle.SOLUTION: A washing device 1 of the present invention comprises a storage tank 30 capable of storing liquid, a pump P for adding air to the liquid to generate mixed liquid, a melting tank 20 for storing the mixed liquid while keeping it under a predetermined pressure, a nozzle 10 for generating and discharging microbubble cleaning liquid by passing the mixed liquid of the melting tank 20 therethrough, and a piping passage for circulating the microbubble cleaning liquid. The piping passage is formed of a storage passage 9 for feeding the liquid to the melting tank 20 from the storage tank 30, a nozzle feeding passage 8 for feeding the mixed liquid in the melting tank 20 to the nozzle 10, and a discharge passage 5 for discharging high pressure gas in the melting tank 20 to outside. The nozzle feeding passage 8 forms a passing passage for the mixed liquid subject to the internal pressure of the melting tank 20. The discharge passage 5 forms a passage of the high pressure gas in the melting tank 20, and comprises a solenoid valve 6 for switching between passage and blockage of the high pressure gas.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cleaning apparatus that sprays a microbubble cleaning liquid containing fine bubbles onto an object to be cleaned to remove dirt such as oil adhering to the object to be cleaned.

  Conventional cleaning apparatuses are disclosed in Patent Document 1 and Patent Document 2, and will be described below with reference to FIG. The conventional cleaning apparatus 100 includes a storage tank 30 that stores a liquid such as water, a pump P that pumps the liquid from the storage tank 30 and sucks outside air or the like to feed a mixed liquid containing gas, A dissolution tank 20 capable of sealing and storing the mixed liquid that has passed through the pump P, and a microbubble cleaning liquid containing fine bubbles by generating the microbubble cleaning liquid connected to the dissolution tank 20 and allowing the mixed liquid to pass therethrough are stored in the storage tank. Nozzle 10 for discharging to 30 and a piping path for circulating the microbubble cleaning liquid and the mixed liquid.

  The piping path includes a storage path 9 that connects the storage tank 30 and the dissolution tank 20 via the pump P, a nozzle feed path 8 that feeds the liquid mixture in the dissolution tank 20 to the nozzle 10, and the nozzle feed path. 8 and a branch path 22 to which the storage tank 30 is connected. In addition, a pressure reducing valve 15 that adjusts the pressure in the dissolution tank 20 is disposed in the nozzle feed path 8, while the branch path 22 has an exhaust means 23 that constantly maintains a negative pressure therein. An electromagnetic valve 25 for opening and closing the internal path is arranged.

  The dissolution tank 20 includes a check valve 20a for introducing the liquid mixture fed from the pump P into the inside thereof, and a pressure sensor (not shown) for detecting the internal pressure thereof. The pressure reducing valve 15 that opens and closes based on the signal is configured so that the internal pressure is constant.

  The conventional cleaning device 100 disclosed in Patent Document 1 stops the supply of the mixed liquid from the dissolution tank 20 to the nozzle 10 by completely closing the pressure reducing valve 15 and opening the electromagnetic valve 25 at the same time. At the same time, the liquid mixture remaining in the section from the pressure reducing valve 15 to the nozzle 10 in the nozzle feed path 8 is drawn into the branch path 22 in the negative pressure state to prevent dripping from the nozzle 10. Thus, an operator (not shown) does not get wet even if he / she puts his / her hand under the nozzle 10 to take out the object 50 to be cleaned or set the next object to be cleaned.

JP 2012-157789 A Japanese Patent Laid-Open No. 06-112180

  However, since the conventional cleaning apparatus 100 is provided with the exhaust unit 23 that always keeps the inside of the branch path 22 in a negative pressure state in order to prevent liquid dripping from the nozzle 10, the parts cost of the exhaust unit 23 is manufactured. There was a problem that it was reflected in the cost and could not be reduced. Further, since the conventional cleaning apparatus 100 is always in the negative pressure state in the branch path 22 as described above, the exhaust means 23 must continue to operate. Therefore, since the power cost required for the operation of the exhaust means 23 becomes high, there is a problem that the running cost of the cleaning device 100 increases.

  The present invention relates to a storage tank capable of storing a liquid, a pump for pumping liquid from the storage tank and sucking outside air to generate a mixed liquid containing gas, and the mixed liquid fed by the pump. A dissolution tank that retains and maintains the pressure, a nozzle that passes through the liquid mixture in the dissolution tank and generates microbubble cleaning liquid containing fine bubbles, and discharges it to the storage tank; the microbubble cleaning liquid and the liquid mixture In the cleaning apparatus including the piping path for circulating the liquid, the piping path includes a storage path for feeding liquid and mixed liquid from the storage tank to the dissolution tank via a pump, and the mixed liquid in the dissolution tank to the nozzle. A nozzle feed path for feeding, and a discharge path for discharging the high-pressure gas in the dissolution tank to the outside, wherein the nozzle feed path is the dissolution tank The mixed liquid that receives internal pressure forms a passage path, and the discharge path forms a passage path for the high-pressure gas in the dissolution tank, and is disposed on the passage path to switch between passage and blocking of the high-pressure gas. It is characterized by comprising a valve. The nozzle is preferably arranged at a position higher than the liquid level of the mixed liquid in the dissolution tank. The discharge path is preferably configured by connecting the dissolution tank and the storage tank. Furthermore, the solenoid valve may be a pressure reducing valve that operates to keep the internal pressure of the dissolution tank constant.

  As described above, the cleaning device 1 of the present invention releases the high-pressure gas in the dissolution tank 20 to the outside when the injection of the microbubble cleaning liquid from the nozzle 10 is stopped. The pressure can be immediately reduced from high pressure to normal pressure. Thereby, there is no need to arrange the distribution passage 22 and the exhaust means 23 as in the conventional case, and there is an advantage that the running cost can be suppressed as compared with the conventional case. Furthermore, since the exhaust path 5 serves as a gas passage, the cleaning device 1 of the present invention can be set to a smaller diameter than the branch path 22 that forms the conventional liquid and gas passage. In other words, the fluid passing through the path such as a pipe flows more in the gas than in the liquid, so that the diameter of the exhaust path 5 can be a small pipe diameter. Therefore, since the pipe diameter used for the exhaust path 5 and the diameter of the solenoid valve 6 can be set to be small in accordance with this, the cleaning apparatus 1 of the present invention has an advantage that a compact apparatus configuration can be obtained as compared with the prior art. There is also.

  In the cleaning device 1 of the present invention, the installation height of the nozzle 10 is set to a position higher than the dissolution tank 20, and the tip position of the nozzle 10 is higher than the liquid level in the dissolution tank 20. It is arranged to be. For this reason, the liquid mixture immediately before being discharged from the nozzle 10 is always pushed toward the nozzle 10 by the pressure of the high-pressure gas accumulated in the upper part of the dissolution tank 20, and the above-described height difference is set. Even so, the microbubble cleaning liquid can be ejected from the nozzle 10. In addition, since the pressure reducing valve 15 (see FIG. 3), which has been conventionally required to stop the injection of the microbubble cleaning liquid, does not have to be installed in the nozzle feed path 8, the components of the nozzle feed path 8 There is also an advantage that can be reduced compared to the conventional.

  Furthermore, since the cleaning apparatus 1 of the present invention includes the exhaust passage 5 for releasing the high-pressure gas in the dissolution tank 20 to the storage tank 30 as shown in FIG. 1, the high-pressure gas as shown in FIG. There is also an advantage that the high-pressure gas is not scattered around the cleaning device 1 without being sprayed to the outside.

  In addition, the cleaning device 1 of the present invention can replace the electromagnetic valve 6 installed in the exhaust path 5 with a pressure reducing valve that operates as a pressure regulating valve in the dissolution tank 20. As a result, the electromagnetic valve 6 (pressure reducing valve) exhibits the pressure adjusting function described above when the mixed liquid is supplied to the nozzle 10, while the microvalve cleaning liquid generation is stopped and the nozzle 10 is stopped when the supply is stopped. Demonstrates the function of preventing dripping from liquid. That is, since the functions of the conventional pressure reducing valve 15 and the electromagnetic valve 25 are obtained by the single electromagnetic valve 6, there is an advantage that the number of parts can be reduced as compared with the conventional one.

It is a schematic explanatory drawing which concerns on the washing | cleaning apparatus of this invention. It is a schematic explanatory drawing which shows another embodiment which concerns on the washing | cleaning apparatus of this invention. It is a schematic explanatory drawing which shows the conventional washing | cleaning apparatus.

  As shown in FIGS. 1 and 2, the cleaning device 1 of the present invention contains a storage tank 30 that stores liquid such as water, and pumps the liquid from the storage tank 30 and sucks outside air and the like to contain gas. A pump P that feeds the mixed liquid, a dissolution tank 20 that can seal and store the mixed liquid that has passed through the pump P, and fine bubbles are mixed by allowing the mixed liquid in the dissolution tank 20 to pass therethrough. The nozzle 10 generates and discharges the microbubble cleaning liquid, and the piping path through which the microbubble cleaning liquid discharged from the nozzle 10 can be collected in the storage tank 30 and can be circulated by the pump P.

  The microbubble cleaning liquid discharged from the nozzle 10 is sprayed onto the object to be cleaned 50, so that deposits such as oil adhered to the object to be cleaned 50 due to the oil separation effect of the fine bubbles contained therein. It has the property of removing. In addition, the liquid in the storage tank 30 is water, a chemical liquid, or the microbubble cleaning liquid generated by the nozzle 10, and the liquid mixture generated by the pump P mixes a gas such as outside air, oxygen, or ozone with the liquid. It is complicated.

  The dissolution tank 20 includes a check valve 20a for introducing the liquid mixture fed from the pump P into the dissolution tank 20, a liquid level sensor (not shown) for detecting the liquid level inside the dissolution tank 20, And a pressure sensor (not shown) for detecting the internal pressure, and configured to keep the pressure of the liquid mixture stored therein constant. Specifically, the liquid level sensor and the pressure sensor are connected to a control means (not shown), and the control means determines the amount of liquid stored in the dissolution tank 20 based on the detection results of the liquid level sensor and the pressure sensor. The pump P and the like are controlled so as to keep the pressure within a predetermined range.

  The nozzle 10 is configured to discharge the microbubble cleaning liquid by allowing the mixed liquid to pass through the nozzle 10, and a tip serving as a discharge port for discharging the microbubble cleaning liquid is a liquid of the mixed liquid in the dissolution tank 20. It is arranged at a position higher than the surface.

  The piping path includes a storage path 9 that feeds liquid and mixed liquid from the storage tank 30 to the dissolution tank 20 via the pump P, and a nozzle feed path 8 that feeds the mixed liquid in the dissolution tank 20 to the nozzle 10. The discharge path 5 discharges high-pressure gas accumulated in the upper part of the dissolution tank 20 to the outside.

  The nozzle feeding path 8 is selected so as not to cause corrosion or the like according to the type of liquid, and specifically, is configured by a pipe such as a steel pipe or a resin pipe. The nozzle feed path 8 forms a passage path for the mixed liquid connecting the dissolution tank 20 and the nozzle 10.

  As for the discharge path 5, a steel pipe or a resin pipe is selected in the same manner as the nozzle feed path 8 described above. As shown in FIG. 1, the end is connected to the storage tank 30, and the other end is the melt. It is connected to the upper part of the tank 20. Further, as shown in FIG. 2, the discharge path 5 may be configured such that its end protrudes upward from the dissolution tank 20 and communicates with the outside air. Further, the discharge path 5 is constituted by an electromagnetic valve 6 that can open and close the path.

  The exhaust path 5 is basically a path through which the gas filled in the dissolution tank 20 passes, and is set smaller than the diameter of the nozzle feed path 8 where the passing material becomes liquid. Yes. In other words, if the flow rate passing through the pipe is the same pressure, the gas is easier to flow than the liquid, so that the discharge path 5 of the cleaning device 1 of the present invention is larger than the diameter of the nozzle feed path 8. Can also be set small. Thereby, since the cost of piping and the aperture of the solenoid valve 6 to which it is connected can be reduced, the cost of the apparatus can be reduced.

  The electromagnetic valve 6 is configured so that the internal path can be fully opened or fully closed, and in addition to the fully open and fully closed pressure reducing function, the pressure of the gas passing therethrough can be adjusted by finely adjusting the diameter of the internal path. It may be a valve. Thus, by making the electromagnetic valve 6 the pressure reducing valve, the throttle of the internal path can be finely adjusted, so that the pressure in the dissolution tank 20 can be controlled with higher accuracy.

  In the cleaning apparatus 1 of the present invention configured as described above, the pump P is activated in response to a command from the control means, and the electromagnetic valve 6 is fully closed. As a result, the liquid and outside air in the storage tank 30 flow into the storage path 9, pass through the pump P, and are stored in the dissolution tank 20. Further, since the dissolution tank 20 includes the check valve 20a, the liquid mixture flowing into the dissolution tank 20 and the internal pressure thereof are increased by this flow. That is, during the operation of the pump P, the pressure in the dissolution tank 20 continues to rise to the upper limit of the capacity of the pump P.

  For this reason, it is necessary to control the pressure in the dissolution tank 20 to be a predetermined pressure. This is made possible by constantly monitoring the pressure in the dissolution tank by the pressure sensor and adjusting and controlling the aperture of the electromagnetic valve 6 (pressure reducing valve) by the control means based on the detected pressure. Therefore, since the electromagnetic valve 6 can be opened even when the pump P is in operation, the pressure in the dissolution tank 20 can be kept constant even if the mixed liquid is continuously injected into the dissolution tank 20.

  On the other hand, the amount of the liquid mixture stored in the dissolution tank 20 is constantly monitored by the liquid level sensor, and the control means controls the stop or operation of the pump P based on the detected liquid level. To keep a certain amount. Therefore, in the cleaning device 1 of the present invention, when the object to be cleaned 50 is being cleaned by spraying the microbubble cleaning liquid from the nozzle 10, the pressure in the dissolution tank 20 and the liquid level in the dissolution tank 20 are set to a predetermined value or position. It is controlled to become.

  Further, when the cleaning of the object to be cleaned 50 is finished, the pump P is stopped in response to a command from the control means, and the electromagnetic valve 6 is fully opened. As a result, the high-pressure gas stored in the upper part of the dissolution tank 20 passes through the exhaust path 5 and is released to the storage tank 30 or the outside air at once. Accordingly, the mixed liquid remaining in the dissolution tank 20, the nozzle feed path 8, and the nozzle 10 changes from a high pressure to a normal pressure, so that it remains in these without being discharged from the nozzle 10. Become. Therefore, dripping from the nozzle can be prevented without installing the branch path 22 and the exhaust means 23 as in the prior art.

DESCRIPTION OF SYMBOLS 1 ... Cleaning apparatus 5 ... Discharge path 6 ... Solenoid valve 8 ... Nozzle feed path 9 ... Storage path 10 ... Nozzle 20 ... Dissolution tank 30 ... Storage tank 50 ... Substance to be cleaned P ... Pump

Claims (4)

A storage tank capable of storing liquid, a pump that pumps liquid from the storage tank and sucks outside air to generate a mixed liquid containing gas, and maintains the mixed liquid fed by the pump at a predetermined pressure. A dissolving tank to be stored, a nozzle for passing through the mixed liquid in the dissolving tank to generate microbubble cleaning liquid containing fine bubbles and discharging it to the storage tank, and a pipe for circulating the microbubble cleaning liquid and the mixed liquid In a cleaning device with a path,
The piping path includes a storage path for feeding liquid and mixed liquid from the storage tank to a dissolution tank via a pump, a nozzle feeding path for feeding the mixed liquid in the dissolution tank to the nozzle, and an inside of the dissolution tank And a discharge path for discharging the high-pressure gas to the outside,
The nozzle feed path forms a passage path for the mixed solution that receives the internal pressure of the dissolution tank,
2. The cleaning apparatus according to claim 1, wherein the discharge path comprises a high-pressure gas passage path in the dissolution tank, and an electromagnetic valve arranged on the passage path for switching between passage and blocking of the high-pressure gas.   The cleaning apparatus according to claim 1, wherein the nozzle is disposed at a position higher than a liquid level of the mixed liquid in the dissolution tank.   The cleaning apparatus according to claim 1, wherein the discharge path is configured by connecting the dissolution tank and the storage tank.   The cleaning device according to any one of claims 1 to 3, wherein the electromagnetic valve is a pressure reducing valve that operates to keep the internal pressure of the dissolution tank constant.

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