JP6477426B2 - Method for draining car wash machine and pump - Google Patents

Description

  The present invention relates to a car wash machine installed in a gas station, for example, and used for car washing, and more particularly to a car wash machine having a high-pressure pump for injecting wash water at a high pressure and a method for draining the pump.

  Conventionally, as a car wash machine used for car washing, it is installed in a gas station, etc., and the liquid agent and washing stored in the liquid storage tank in the car to be washed are moved relative to each other in the front-rear direction. 2. Description of the Related Art A gate-type car wash machine that is configured to inject water, brush, and wash a car is known.

  Some conventional car wash machines include a low pressure pump for injecting cleaning water and various liquid agents and a high pressure pump for injecting cleaning water at a high pressure to perform preliminary cleaning (see, for example, Patent Document 1). .

  In addition, in the case of a car wash machine installed in a cold region, there is a demand for a device that prevents the remaining water in the water pipe and the pump from freezing. Therefore, a car wash machine that discharges water in the nozzle pipe using compressed air has been already proposed to prevent freezing (see, for example, Patent Document 2).

JP-A-5-338517 Japanese Patent No. 4058016

  Although it is possible to discharge the water in the pipe by introducing compressed air into the water pipe, it is difficult to effectively discharge the residual water in the pump. In particular, when a multistage impeller-type centrifugal pump is used as a high-pressure pump, it becomes even more difficult.

  Simply draining the residual water in the pipe or pump is not preferable because it wastes water resources. In addition, when performing high-pressure car wash using high-pressure water generated by a high-pressure pump, high-pressure car wash cannot be performed until the high-pressure pump is filled and water can be generated at the start of car wash. It is desirable to be able to discharge residual air and fill with water.

  For this reason, in a car wash machine installed in an area where the outside air temperature drops below freezing point, it is preferable that water in the high-pressure pump can be quickly discharged after the car wash is completed, and residual air in the high-pressure pump can be discharged quickly at the start of the car wash. Therefore, it is desirable to realize a car wash machine that can be filled with water.

  In view of the above problems, the present invention provides a water draining method for a pump capable of quickly collecting water in a high-pressure pump after completion of car washing in a car wash machine equipped with a high-pressure pump. An object of the present invention is to provide a car wash machine that can discharge residual air, fill water, discharge high-pressure water in a short time, and can effectively use water resources.

  To achieve the above object, the present invention provides a water storage tank, a high-pressure pump, a supply pipe for supplying water from the water storage tank to the high-pressure pump, and supplies high-pressure water generated by the high-pressure pump to the car wash machine body. A car wash machine capable of washing with high-pressure water with a high-pressure water pipe, wherein the supply pipe is provided with a compressed air introduction part, and a solenoid valve is attached to an air vent provided in the high-pressure pump. A recovery hose is attached to the discharge port side of the tank, and the recovery hose is connected to a water storage tank to form a drainage recovery path. After the car wash is completed, the electromagnetic valve is opened and compressed air is supplied from the compressed air introduction section for a predetermined time. By introducing water, the water in the high-pressure pump is collected in the water storage tank, and at the start of car washing, the electromagnetic valve is opened and the water in the water storage tank is supplied to the high-pressure pump through the supply pipe for a predetermined time. , Close the solenoid valve, It is characterized in that to start the car wash after filling water into the pump.

  According to this configuration, after the car wash is completed, the water in the high-pressure pump can be collected in the water storage tank via the drainage collection path. Further, at the start of car washing, the solenoid valve can be opened to quickly discharge the residual air, and the water supplied from the water storage tank can be quickly filled in the high-pressure pump. That is, when the car wash starts, the residual air in the high-pressure pump is quickly discharged, the water can be filled, high-pressure water can be discharged in a short time, and a car wash machine capable of effectively using water resources is obtained. be able to.

  In the car wash machine having the above-described configuration, the predetermined time for introducing the compressed air from the compressed air introduction portion after the car wash is set in advance to the time when the water in the high-pressure pump is discharged, and is sent at the start of the car wash. The predetermined time for supplying water into the high-pressure pump through the supply pipe is set in advance to a time when the high-pressure pump is filled with water. According to this configuration, after the car wash is completed, the water in the high-pressure pump can be reliably collected in the water storage tank, and at the start of the car wash, the water supplied from the water storage tank can be reliably filled in the high-pressure pump. it can.

  In the car wash machine having the above-described configuration, the high-pressure pump may be configured such that after the time set in advance as the time for feeding water into the high-pressure pump via the feed pipe has elapsed, the solenoid valve is closed. It is characterized by starting operation. According to this configuration, it becomes possible to supply high-pressure water immediately after the operation of the high-pressure pump is started, and it is possible to quickly wash the car using the high-pressure water.

  Further, the present invention is a method of draining a pump of the car wash machine, wherein after the car wash is finished, an electromagnetic valve interposed in an air vent provided in the high pressure pump is opened, and compressed air is introduced from a compressed air introduction part. Thus, the water in the high-pressure pump is collected in the water storage tank via the drainage recovery path from the high-pressure pump to the water storage tank.

  According to this configuration, in a car wash machine equipped with a high-pressure pump, it is possible to obtain a pump draining method that can quickly drain the water in the high-pressure pump after the car wash is completed. Further, according to the draining method of this pump, since water is not drained wastefully, water can be effectively used.

  According to the present invention, in a car wash machine equipped with a high-pressure pump, it is possible to obtain a method for draining the pump that can quickly collect water in the high-pressure pump after the car wash is completed. It is possible to discharge a high pressure water in a short time and discharge a high pressure water, and to obtain a car wash machine capable of effectively using water resources.

It is a side surface schematic diagram which shows the whole structure of the car wash machine which concerns on this invention. It is a schematic explanatory drawing explaining the waste_water | drain collection | recovery path | route interposed by the high pressure pump with which the car wash machine which concerns on this invention is provided. It is a flowchart which shows the process of the draining method of the pump which concerns on this invention. It is a flowchart which shows the process at the time of the car wash start of the car wash machine which concerns on this invention. It is a schematic side view which shows the whole structure of a car wash machine. It is a schematic front view of a car wash.

  Embodiments of the present invention will be described below with reference to the drawings. Moreover, the same code | symbol is used about the same structural member, and detailed description is abbreviate | omitted suitably.

  The car wash machine WA of the present embodiment is a car wash machine that performs a car wash using compressed air, water, and a liquid agent while relatively moving the car wash machine body and the vehicle to be cleaned in the front-rear direction, and is a schematic side view of FIG. As shown in FIG. 1, a tank storage portion 17 for storing a plurality of liquid storage tanks (not shown) for storing various liquid agents such as detergents and waxes, and cleaning water and liquid agents from the respective liquid storage tanks via a solenoid valve or the like. The distribution piping part 18 to distribute is provided. Moreover, it is provided with a plurality of injection nozzles for injecting cleaning water and various liquid agents, for example, an injection nozzle 10A for mainly injecting cleaning water, and an injection nozzle for injecting cleaning water mainly mixed with various liquid agents 10B.

  The injection nozzle 10 (10A, 10B) is configured to be capable of high-pressure spraying in order to exhibit a higher cleaning effect. Moreover, it is set as the structure which can respond also to the low pressure washing process which performs car washing with a smaller amount of water corresponding to a normal car wash. For this reason, the car wash machine WA of the present embodiment is capable of handling both the high pressure washing process and the low pressure washing process using the injection nozzle 10 (10A, 10B). For example, the injection nozzle 10A is used for high-pressure spraying for pre-rinse, shampoo, and wax, and the injection nozzle 10B is used for high-pressure spraying for final rinse.

  The car wash machine WA configured to perform high pressure spraying in addition to a normal car wash includes a submersible pump P1 and a high pressure pump P2 installed in the water storage tank 70. For example, a vertical multistage centrifugal pump is used as the high-pressure pump P2.

  Then, water of a predetermined water pressure is supplied from the high pressure pump P2 to the distribution piping portion 18 of the car wash machine body 1 through the high pressure water piping 74. At this time, a water amount adjusting means 72 is provided in the water distribution section 71 provided with the high-pressure pump P2, and the water is adjusted to an appropriate amount of water to supply water so that the water is adjusted to an appropriate amount and water pressure corresponding to the washing process. Water can be supplied. That is, low-pressure water cleaning can be performed in addition to high-pressure water cleaning.

  The high-pressure water pipe 74 is introduced into the upper rear surface of the car wash machine main body 1 from a support guide 62 provided at an upper part of a tilting pole 60 that is erected on the support leg 61 so as to be tiltable. The high-pressure water pipe 74 is installed so as to be slackened in advance so as to be compatible with the traveling movement of the car wash machine body 1.

  The water amount adjusting means 72 is composed of, for example, a multistage solenoid valve. By using a combination of the multistage solenoid valves having a predetermined number of stages, the water amount can be adjusted in multiple stages greater than the number of stages. For example, it is possible to adjust the amount of water in multiple stages more than the number of stages of the multistage type by combining the circulation water quantities by the respective solenoid valves as different water quantity ratios.

  Further, in this embodiment, in order to prevent the car washing operation from being disabled due to freezing of the remaining water in a cold condition, the remaining water in the high-pressure pump is not particularly frozen so that the remaining water in the water pipe or the pump is not frozen. It is devised as such. In addition to preventing freezing of residual water, it is intended to make effective use of water resources.

  For example, as shown in FIG. 2, the car wash machine WA according to the present embodiment is generated by a water storage tank 70, a high pressure pump P2, a supply pipe 73 for supplying water from the water storage tank 70 to the high pressure pump P2, and a high pressure pump P2. A high-pressure water pipe 74 for supplying the high-pressure water to the car wash machine main body 1 is provided. Further, a compressed air introduction part 77 is provided in the supply pipe 73, an electromagnetic valve 81 is attached to an air vent port 76 provided in the high-pressure pump P2, and a recovery hose 75 is attached to the discharge port side of the electromagnetic valve 81. 75 is connected to the water storage tank 70 to form a drainage recovery path W1.

  After the car wash is completed, the electromagnetic valve 81 is opened (the electromagnetic valves 82 and 83 are closed) and the compressed air is introduced from the compressed air introduction part 77, so that the water in the high-pressure pump P2 is returned to the water storage tank 70. At the start of car wash, the electromagnetic valve 81 is opened and the water in the water storage tank 70 is supplied into the high-pressure pump P2 through the submersible pump P1 and the supply pipe 73, and then the electromagnetic valve 81 is closed. Thus, after the high pressure pump P2 is filled with water, driving of the high pressure pump P2 is started to perform a car wash operation.

  With such a configuration, after the car wash is completed, the water in the high-pressure pump P2 can be returned to the water storage tank 70 via the drainage recovery path W1, and the water remaining in the high-pressure pump P2 can be recovered. In addition, when the car wash is started, the water fed from the water storage tank 70 can be quickly filled in the high-pressure pump P2. That is, at the start of the car wash, the residual air in the high-pressure pump P2 can be quickly discharged and the water can be easily filled so that the high-pressure water can be discharged in a short time. High-pressure water can be quickly supplied to the supply path W2. Therefore, according to this embodiment, it is possible to obtain a car wash machine WA that can effectively use water resources and does not deteriorate the car wash efficiency.

  In the car wash machine WA having the above-described configuration, it is preferable that the time for introducing the compressed air from the compressed air introduction unit 77 after the completion of the car wash is set in advance to the time when the water in the high-pressure pump P2 is discharged. The time for feeding water into the high-pressure pump P2 via the feed pipe 73 is preferably set in advance to a time for filling the high-pressure pump P2 with water. With this configuration, the water in the high-pressure pump P2 can be reliably recovered in the water storage tank 70 after the car wash is completed, and the water fed from the water storage tank 70 into the high-pressure pump P2 is reliably ensured at the start of the car wash. Can be charged to.

  Further, in the car wash machine WA having the above-described configuration, the high pressure pump P2 is operated after the time set in advance as the time for feeding water into the high pressure pump P2 via the feed pipe 73 and the electromagnetic valve 81 is closed. It is preferable to start operation from the beginning. With this configuration, high-pressure water can be supplied immediately after the start of operation of the high-pressure pump P2, and car washing using high-pressure water can be performed quickly.

  As described above, the method of draining the pump of the car wash machine WA according to the present embodiment opens the electromagnetic valve 81 interposed in the air vent port 76 provided in the high pressure pump P2 after the car wash, By introducing the compressed air generated by the compressor 78, the water in the high pressure pump P2 is recovered in the water storage tank 70 via the drainage recovery path W1 from the high pressure pump P2 to the water storage tank 70. If it is this structure, in the car wash machine WA provided with the high-pressure pump P2, the water draining method of the pump which can discharge | emit the water in the high-pressure pump P2 rapidly after completion | finish of car washing can be obtained. Further, according to the draining method of this pump, since water is not drained wastefully, water can be effectively used.

  Next, the water draining method of the pump of the car wash machine WA according to the present embodiment will be further described with reference to the flowchart shown in FIG.

  When the car wash is finished and the next car wash is not executed continuously, the pump draining operation may be executed by a predetermined operation. When the car wash is completed and the water draining operation is executed, both the submersible pump P1 and the high-pressure pump P2 are stopped (S1). From this state, the solenoid valve 81 is opened, the solenoid valves 82 and 83 are closed, and the compressed air generated by the compressor 78 is introduced from the compressed air introduction section 77 (S2).

  The introduction period of the compressed air may be a predetermined time T1 determined in advance. The predetermined time T1 is a time when all the water in the high-pressure pump P2 is discharged and the compressed air leaks out from the air vent 76, and is about 10 seconds, for example. After step S2, it is confirmed whether or not the predetermined time T1 has elapsed (S3), and if it is confirmed that the predetermined time T1 has elapsed, the process proceeds in the YES direction and the introduction of compressed air is stopped (S4). The valve 81 is closed (S5). If the predetermined time T1 has not elapsed, the process proceeds in the NO direction, and the introduction of the compressed air in S2 is continued.

  When the car wash operation is started using the car wash machine WA in a state where the water drain operation is performed after the car wash is completed, the operation steps shown in the flowchart of FIG. That is, when the car washing operation is started, first, the electromagnetic valve 81 and the electromagnetic valve 82 are opened, the electromagnetic valve 83 is closed (S11), the submersible pump P1 is started, and water is supplied into the high-pressure pump P2. Supply is started (S12).

  When water is supplied into the high-pressure pump P2 with the electromagnetic valve 81 opened, the air in the high-pressure pump P2 is pushed out by the supplied water and sent from the recovery hose 75 to the water storage tank 70. For example, the water contact parts of a multistage impeller type centrifugal pump are all made of stainless steel, and since there is no mixing of chemicals such as detergents and waxes, the quality of the water discharged and recovered from the pump is good. Reusable enough for car wash.

  The supply of water into the high pressure pump P2 may be performed for a predetermined time T2. The predetermined time T2 is a time when all the air in the high-pressure pump P2 is exhausted and water leaks from the air vent 76, and may be about 15 seconds, for example. After step S12, it is confirmed whether or not the predetermined time T2 has passed (S13), and if it is confirmed that the predetermined time T2 has passed, the process proceeds to the YES direction of S13, and the electromagnetic valve 81 is closed (S14). The electromagnetic valve 83 is opened (S15), the high pressure pump P2 is driven (S16), and the car wash is started. Until the predetermined time T2 elapses, the water supply in S12 is continued.

  If the residual air in the high-pressure pump P2 is not successfully discharged, high-pressure water cannot be generated immediately after the high-pressure pump P2 is started, and the injection of high-pressure water may not be stable for more than one minute. However, it was found that the predetermined time T2 for filling the high-pressure pump P2 with water without starting the high-pressure pump P2 may be about 15 seconds. It is obvious that once the high pressure pump P2 is filled with water, high pressure water can be jetted quickly.

  The draining method described above is a draining method in the high-pressure pump P2, but draining in the high-pressure water pipe 74 on the downstream side of the high-pressure pump P2 is performed by closing the solenoid valve 81 and the solenoid valve 82. This can be easily carried out by introducing compressed air from the compressed air introduction part 77 in a state in which is opened. This draining method is a conventionally known method.

  That is, the water draining method of the present embodiment is a water draining method suitable for draining water in the high-pressure pump P2 such as a multistage impeller type centrifugal pump, which is difficult to drain with the conventional method.

  Next, the overall configuration of the car wash machine WA and the outline of the car wash operation will be described with reference to FIGS. FIG. 5 is a side view showing the overall configuration of the car wash machine WA of one embodiment, and FIG. 6 is a schematic front view. The car wash machine WA includes a car wash machine main body (main body part) 1 that has a ceiling 91 that connects upper ends of two left and right opposing stand parts 90 and is formed in a gate shape. A remote panel 7 </ b> A is disposed on the approach path of the car wash machine body 1. The vehicle to be cleaned CA stops in front of the remote panel 7A, and receives a car wash by operating the remote panel 7A.

  Wheels 3 arranged on a pair of left and right rails 2 provided on the ground are provided on the bottom surface of the car wash machine main body 1. As a result, the car wash machine main body 1 is erected so as to travel on the rail 2 and move relative to the vehicle to be cleaned CA.

  The car wash machine main body 1 is provided with a plurality of rotating brushes for brushing the vehicle to be cleaned CA. The brush comprises a top brush 4, a side brush 5 and a rocker brush 6. The top brush 4 is formed by brushing and cleaning the upper surface of the vehicle CA to be cleaned, and radially fixing brush hairs made of cloth (woven fabric, knitted fabric, non-woven fabric, etc.) or resin fibers.

  A pair of left and right side brushes 5 is provided, and slides on both side surfaces and front and rear surfaces of the vehicle to be cleaned CA to clean the vehicle to be cleaned CA. A pair of left and right rocker brushes 6 are provided to clean the lower portion of the side surface including the tire of the vehicle CA to be cleaned. The side brush 5 and the rocker brush 6 also have the same rotating shaft and brush hair as the top brush 4.

  On one side of the car wash machine main body 1 is disposed a tank storage portion 17 for storing a plurality of liquid storage tanks (not shown) for storing various liquid agents such as detergents and waxes. Distributing piping 18 for distributing the washing water and the liquid agent from each liquid storage tank via a solenoid valve or the like is provided above the tank housing 17. First and second water purification nozzles 11 and 13, first and second detergent nozzles 12 and 15, a water-repellent coating nozzle 14, and a wax nozzle 16 are led out to the distribution pipe portion 18. A supply unit (not shown) for supplying cleaning liquid and high-pressure air is provided behind the car wash machine main body 1 and connected to the distribution piping unit 51. The cleaning liquid may be mixed not only with city water but also with various liquid agents such as detergents and waxes.

  The first and second water purification nozzles 11 and 13 are respectively arranged on the front side and the back side of the car wash machine body 1 and inject washing water to the vehicle CA to be washed. The first and second detergent nozzles 12 and 15 are respectively arranged on the near side and the far side of the car wash machine main body 1 and spray detergent onto the vehicle to be cleaned CA. The water repellent coating nozzle 14 is disposed on the back side of the car wash machine body 1 and sprays a water repellent coating agent onto the vehicle CA to be cleaned. The wax nozzle 16 is disposed on the back side of the car wash machine body 1 and injects wax onto the vehicle CA to be cleaned.

  The car wash machine main body 1 is provided with a top blow nozzle 21 and a side blow nozzle 22 as blow nozzles for drying the vehicle CA to be cleaned. A top blowing nozzle 21 is provided at the upper rear portion of the car wash machine main body 1, and side blowing nozzles 22 are further provided on both sides on the rear side. The top blower nozzle 21 and the side blower nozzle 22 blow the blown air from the blower 20 against the vehicle CA to be cleaned.

  A vehicle sensor 8 is provided on the front upper portion of the car wash machine body 1. The vehicle sensor 8 includes a photoelectric sensor, an ultrasonic sensor, and the like, and detects the vehicle to be cleaned CA that enters the car wash machine body 1. Moreover, in order to detect the vehicle shape of the to-be-cleaned vehicle CA, the vehicle shape detection part (not shown) which consists of an area sensor which consists of a transmissive | pervious photoelectric sensor may be provided in the entrance part of the car wash machine main body 1.

  An operation panel 7 is disposed on the front surface on one side of the car wash body 1. The operation panel 7 has the same operation buttons as the remote panel 7A, and accepts a car wash and sets car wash conditions by the operation of a user who gets off the vehicle to be cleaned CA.

  As setting of the car wash conditions, buttons for adding shampoo, waxing, water repellent coat, etc. to the water wash are provided on the operation panel 7 and the remote panel 7A. There are also buttons for high-grade shampoo, high-grade wax (for example, glazing coating), high-grade water repellent coating, special coating, etc., and a button for selecting a high-pressure washing process. In addition, equipment setting buttons such as front guard, fender pole, door mirror, rear wiper, and no applicable equipment are provided.

  The car wash machine WA of the present embodiment is a car wash machine that performs a car wash of the vehicle to be cleaned CA while relatively moving the car wash machine body 1 and the vehicle to be cleaned CA in the front-rear direction. In addition to the process, a high-pressure washing process can be performed.

  That is, the first and second water purification nozzles 11 and 13, the first and second detergent nozzles 12 and 15, the water repellent coating nozzle 14, and the wax nozzle 16 are each provided with a plurality of injection nozzles, and high pressure is applied to these injection nozzles. The spray nozzle 10 (10A, 10B) that can be sprayed is used.

  Therefore, when a high-pressure cleaning process is selected via the operation panel 7 or the remote panel 7A, appropriate water pressure and water amount corresponding to each process are set. For example, by providing the water amount adjusting means 72 capable of adjusting the water amount in a multi-stage manner, it becomes possible to adjust the water pressure and the water amount in multiple stages.

  For this purpose, when the preliminary cleaning is performed by high-pressure spraying, the first water purification nozzle 11 is used, and a large amount of high-pressure water is supplied to the plurality of injection nozzles 10 provided in the upper, middle, and lower portions. When low pressure cleaning is selected, medium or small amount of high pressure water may be supplied to the plurality of injection nozzles 10 provided at the upper part, middle part, and lower part of the first water purification nozzle 11.

  Thus, if it is the structure which supplies water via the water distribution part 71 which has the same high voltage | pressure pump P2 and the water quantity adjustment means 72 to several injection nozzles, it will be a large amount by the high pressure to several injection nozzles 10 (10A, 10B). High pressure cleaning is possible by supplying water, and low pressure cleaning is also possible by supplying a small amount or medium amount of water to the plurality of jet nozzles 10 (10A, 10B).

  In a low-temperature environment such as winter, if water remains in the high-pressure pump P2, it will freeze in the pump and become unusable or damage the equipment. Further, simply discharging the residual water in the water distribution pipe or the pump using the compressed air causes a problem that the amount of water to be discharged is wasted.

  Therefore, by adopting a water draining method in which the electromagnetic valve 81 according to the present embodiment is opened and closed to collect the water in the pump, after the car wash is completed, the inside of the high pressure pump P2 is disposed via the drainage recovery path W1. All the water can be collected in the water storage tank 70, and at the start of the car wash, the residual air in the high-pressure pump P2 can be quickly discharged to fill the water, and high-pressure water can be generated and discharged in a short time. .

  That is, when it is desired to drain the water, the drainage can be reliably drained, and the drained water can be collected and reused, so that the car wash machine WA capable of effectively using water resources can be obtained. Further, when the high pressure pump P2 after the water is drained is redriven, the water is supplied while the air in the high pressure pump P2 is being drained before the high pressure pump P2 is driven. The inside can be filled with water.

  As described above, according to the car wash machine WA according to the present embodiment, the compressed air introduction part 77 is provided in the feed pipe 73, the electromagnetic valve 81 is mounted on the air vent port 76 provided in the high-pressure pump P2, and the electromagnetic valve 81 is provided. A recovery hose 75 is attached to the discharge port side of the water, and the recovery hose 75 is connected to the water storage tank 70 to form a drainage recovery path W1. After the car wash is completed, the electromagnetic valve 81 is opened and the compressed air introduction part 77 is opened. By introducing compressed air from the water, the water in the high-pressure pump P2 is collected in the water storage tank 70, and at the start of the car wash, the electromagnetic valve 81 is opened to supply the water in the water storage tank 70 through the supply pipe 73 to a high pressure. After the feed into the pump P2, the electromagnetic valve 81 is closed and the high pressure pump P2 is filled with water and then the car wash is started. High pressure port A method for draining the pump that can quickly collect the water in the pump P2 can be obtained, and at the start of the car wash, the residual air in the high-pressure pump P2 can be quickly discharged to fill the water and discharge the high-pressure water in a short time. It is possible to obtain a car wash machine WA capable of effectively using water resources.

  That is, in the car wash machine WA provided with the high-pressure pump P2, it is possible to suppress a harmful effect caused by freezing of residual water, to effectively use water resources, and to realize a car wash machine that does not deteriorate the car wash efficiency.

  Therefore, the water washing method of the car wash machine and the pump according to the present invention is preferably applied to a car wash machine installed in a low temperature environment where water freezes.

DESCRIPTION OF SYMBOLS 1 Car wash machine main body 2 Rail 3 Wheel 10 Injection nozzle 70 Water storage tank 73 Supply piping 74 High pressure water piping 75 Recovery hose 76 Air vent 77 Compressed air introduction part 81 Electromagnetic valve P1 Submersible pump P2 High pressure pump CA Washed vehicle WA Car wash machine

Claims (4)

A high-pressure water pipe comprising a water storage tank, a high-pressure pump, a supply pipe for supplying water from the storage tank to the high-pressure pump, and a high-pressure water pipe for supplying high-pressure water generated by the high-pressure pump to the car wash machine body. A car wash machine capable of being used,
A compressed air introduction part is provided in the supply pipe,
The upper surface of the high-pressure pump has an air vent, and a solenoid valve is attached to the air vent,
Attach a recovery hose to the discharge port side of the solenoid valve, connect the recovery hose to the water storage tank to form a drainage recovery path,
After the car wash is finished, the water in the high-pressure pump is collected in the water storage tank by opening the electromagnetic valve and introducing compressed air from the compressed air introduction part for a predetermined time,
At the start of car washing, the electromagnetic valve is opened and water in the water storage tank is supplied into the high-pressure pump through the supply pipe for a predetermined time, and then the electromagnetic valve is closed to A car wash machine characterized by starting a car wash after filling water.   The predetermined time for introducing the compressed air from the compressed air introduction section after the completion of the car wash is set in advance to the time when the water in the high pressure pump is discharged, and the inside of the high pressure pump passes through the supply pipe at the start of the car wash. The car wash machine according to claim 1, wherein the predetermined time for supplying water to the vehicle is set in advance to a time for filling the high-pressure pump with water.   The high-pressure pump is started to operate after a predetermined time has elapsed as a time for feeding water into the high-pressure pump through the feed pipe and the solenoid valve is closed. The car wash machine according to claim 2. A high-pressure water pipe comprising a water storage tank, a high-pressure pump, a supply pipe for supplying water from the storage tank to the high-pressure pump, and a high-pressure water pipe for supplying high-pressure water generated by the high-pressure pump to the car wash machine body. A method of draining a pump of a car wash machine capable of being used,
A compressed air introduction part is provided in the supply pipe,
The upper surface of the high-pressure pump has an air vent, and a solenoid valve is attached to the air vent,
Attach a recovery hose to the discharge port side of the solenoid valve, connect the recovery hose to the water storage tank to form a drainage recovery path,
After the car wash is completed, the solenoid valve interposed in the air vent is opened, and the compressed air is introduced from the compressed air introduction unit, thereby the drainage recovery path from the high pressure pump to the water storage tank through the drainage recovery path. A method for draining a pump, wherein water in the high-pressure pump is collected in the water storage tank.

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