Self-service car washing machine constant temperature component

Abstract

The utility model discloses a kind of self-service car washer constant temperature components, more specifically relates to car washer field, including body, water tank and heat exchanger are installed in body interior, heater is installed in water tank bottom, water inlet pipe extending into water tank is installed in water tank top, four-way valve is installed in the top end of water inlet pipe located in water tank top, water delivery pipe for water delivery to water tank interior is connected on four-way valve, water outlet pipe is connected between four-way valve and heat exchanger, water spray pipe extending to body exterior is connected in heat exchanger output end, spray gun is installed in the other end of water spray pipe.The utility model is stable lock temperature by the phase change thermal insulation material of three-layer structure water tank, high-efficiency heat exchange is combined with miniature plate heat exchanger and axial flow fan, cooperate closed loop regulation accurate temperature control, with the help of air compressor and multi-valve cooperation realizes full pipeline emptying, check valve prevents reverse flow, compact structure and energy saving, water temperature instability and pipeline freezing problem can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of car wash machines, and more specifically, to a constant temperature component for a self-service car wash machine. Background Technology

[0002] The existing temperature control components of self-service car wash machines have many shortcomings: the water temperature is easily affected by the ambient temperature, lacking a stable heat preservation mechanism, resulting in large fluctuations in the outlet water temperature. Excessive heat can damage the vehicle surface, while excessive cold affects the cleaning effect; cooling relies heavily on natural heat dissipation, which is inefficient and makes it difficult to quickly adjust the hot water to a suitable temperature; residual water in the pipes cannot be completely removed, and it is prone to freezing in low-temperature environments, causing pipe blockage or even rupture; the heat preservation structure is simple, heat loss is rapid, and the heater needs to be started frequently, resulting in high energy consumption; moreover, the overall structure is loose and occupies a large space, making it difficult to adapt to the compact installation environment of self-service car wash machines. These problems seriously affect the practicality and service life of the equipment. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a constant temperature component for a self-service car wash machine, including a body, a water tank and a heat exchanger installed inside the body, a heater installed at the bottom of the water tank, an inlet pipe extending into the water tank installed at the top of the water tank, a four-way valve installed at the top of the inlet pipe, a water supply pipe connected to the four-way valve for supplying water into the water tank, an outlet pipe connected between the four-way valve and the heat exchanger, a spray pipe extending to the outside of the body connected to the output end of the heat exchanger, a spray gun installed at the other end of the spray pipe, a first three-way valve installed at the end of the spray pipe near the heat exchanger, a temperature sensor installed on the spray pipe between the first three-way valve and the heat exchanger, a second three-way valve installed at the end of the spray pipe near the spray gun, a first return pipe connected between the four-way valve and the first three-way valve, and a second return pipe connected between the second three-way valve and the bottom of the water tank.

[0004] In a preferred embodiment, the heat exchanger is a miniature plate heat exchanger, the input end of which is connected to an air inlet pipe that extends to the outside of the machine body, and an axial flow fan is installed on the air inlet pipe.

[0005] In a preferred embodiment, a duckbill-type check valve is installed on the second return water pipe.

[0006] In a preferred embodiment, an air compressor is installed on the outer wall of the water tank, and a diversion three-way valve is connected to the output end of the air compressor. The other two ports of the diversion three-way valve are respectively connected to a first air blowing pipe and a second air blowing pipe.

[0007] In a preferred embodiment, a third three-way valve is installed at the other end of the first air blowing pipe, which is installed at the end of the water outlet pipe near the four-way valve, and a fourth three-way valve is installed at the other end of the second air blowing pipe, which is installed at the end of the first return water pipe near the first three-way valve.

[0008] In a preferred embodiment, the water tank is configured with a three-layer structure, with the middle layer being a phase change insulation material.

[0009] The technical effects and advantages of this utility model are as follows:

[0010] This utility model uses phase change insulation material in a three-layer water tank to stabilize and lock in temperature, combined with a micro plate heat exchanger and axial flow fan for efficient heat exchange, and closed-loop regulation for precise temperature control. It also uses an air compressor and multiple valves to achieve full pipeline venting, and a one-way valve to prevent backflow. The structure is compact and energy-saving, and can avoid problems such as unstable water temperature and pipeline freezing. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Explanation of reference numerals in the attached drawings: 1. Body, 2. Water tank, 3. Heat exchanger, 4. Inlet pipe, 5. Four-way valve, 6. Water supply pipe, 7. Outlet pipe, 8. Spray pipe, 9. Spray gun, 10. First three-way valve, 11. Temperature sensor, 12. Second three-way valve, 13. First return pipe, 14. Second return pipe, 15. Air inlet pipe, 16. Axial flow fan, 17. Duckbill type check valve, 18. Air compressor, 19. Diverter three-way valve, 20. First air blowing pipe, 21. Second air blowing pipe, 22. Third three-way valve, 23. Fourth three-way valve. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0014] like Figure 1The self-service car wash machine's constant temperature component includes a body 1. Inside the body 1, a water tank 2 and a heat exchanger 3 are installed. A heater is installed at the bottom of the water tank 2. A water inlet pipe 4 extending into the water tank 2 is installed at the top of the water inlet pipe 4. A four-way valve 5 is installed at the top of the water inlet pipe 4. A water supply pipe 6 is connected to the four-way valve 5 to supply water into the water tank 2. An outlet pipe 7 is connected between the four-way valve 5 and the heat exchanger 3. The output end of the heat exchanger 3 is connected to an outlet pipe extending out of the body 1. The water spray pipe 8 is installed at one end of the water spray pipe 8 and the other end of the water spray pipe 8 is equipped with a spray gun 9. A first three-way valve 10 is installed at the end of the water spray pipe 8 near the heat exchanger 3. A temperature sensor 11 is installed on the water spray pipe 8 between the first three-way valve 10 and the heat exchanger 3. A second three-way valve 12 is installed at the end of the water spray pipe 8 near the spray gun 9. A first return water pipe 13 is connected between the four-way valve 5 and the first three-way valve 10. A second return water pipe 14 is connected between the second three-way valve 12 and the bottom of the water tank 2.

[0015] Based on the above, during operation, constant temperature control and water circulation are achieved through the coordinated use of multiple pipelines and valves. During water supply, water is supplied to water tank 2 via water pipe 6 through four-way valve 5 (four-way valve 5 at this time opens the "water supply pipe 6 → water tank 2" passage); the water in water tank 2, after being heated by heater 24, enters heat exchanger 3 through the "water tank 2 → outlet pipe 7" passage opened by four-way valve 5; the water treated by heat exchanger 3 flows to spray pipe 8, and temperature sensor 11 monitors the water temperature in real time. If the temperature meets the standard, the first three-way valve 10 opens... The heat exchanger 3 → spray pipe 8 → spray gun 9 passage (the second three-way valve 12 simultaneously opens the "spray pipe 8 → spray gun 9" passage) to achieve normal water supply; if the standard is not met, the first three-way valve 10 switches to the "spray pipe 8 → first return water pipe 13" passage, and the four-way valve 5 simultaneously opens the "first return water pipe 13 → water tank 2" passage, and the substandard water flows back to the water tank 2 for readjustment; before shutdown, the second three-way valve 12 can switch to the "spray pipe 8 → second return water pipe 14" passage to send the residual water in the spray pipe 8 back to the water tank 2;

[0016] Furthermore, by forming a closed-loop regulation with the four-way valve 5, the first three-way valve 10, the second three-way valve 12, and the double return water pipe, the water temperature is ensured to be accurately controllable, avoiding the direct output of substandard water that affects the car washing effect, while also realizing the directional recovery of residual water in the pipeline.

[0017] The heat exchanger 3 is a miniature plate heat exchanger. The input end of the miniature plate heat exchanger is connected to the air inlet pipe 15, which extends to the outside of the body 1. An axial flow fan 16 is installed on the air inlet pipe 15.

[0018] When the water temperature at the outlet of water tank 2 is higher than the target value, the axial flow fan 16 starts and draws in cold air from outside the body 1 through the air inlet pipe 15. The cold air and the high temperature water come into counter-current contact in the micro plate heat exchanger and heat is efficiently transferred through the metal plate to achieve a rapid decrease in water temperature. If the water temperature reaches the target value, the axial flow fan 16 stops and the heat exchanger 3 only serves as a water flow path and does not perform heat exchange.

[0019] Furthermore, the miniature plate heat exchanger has a large heat exchange area and small size, making it suitable for the compact space of the machine body 1; the axial flow fan 16 can be started and stopped as needed, and the cooling efficiency is enhanced by forced air convection, ensuring that the high temperature water is quickly reduced to the target temperature and avoiding damage to the vehicle surface due to excessive water temperature.

[0020] A duckbill-type check valve 17 is installed on the second return water pipe 14. The duckbill-type check valve 17 only allows water to flow unidirectionally from the second three-way valve 12 to the bottom of the water tank 2. When the residual water in the spray pipe 8 enters the second return water pipe 14 through the second three-way valve 12, the water pressure pushes the check valve 17 to open, realizing backflow. However, the water in the water tank 2 or water flow in other directions cannot push open the check valve 17, preventing backflow from contaminating or interfering with the water temperature in the spray pipe 8.

[0021] An air compressor 18 is installed on the outer wall of the water tank 2. The output end of the air compressor 18 is connected to a diversion three-way valve 19. The other two ports of the diversion three-way valve 19 are respectively connected to the first air blowing pipe 20 and the second air blowing pipe 21.

[0022] After the car wash is completed, the air compressor 18 starts to generate compressed air, and the three-way valve 19 switches to the open state, dividing the compressed air into two paths: one path is delivered to the outlet pipe 7 via the first air blowing pipe 20, and the other path is delivered to the first return water pipe 13 via the second air blowing pipe 21; the diversion achieves synchronous air blowing to the outlet pipe 7 and the first return water pipe 13, providing power for the emptying of the entire pipeline.

[0023] The other end of the first air blowing pipe 20 is equipped with a third three-way valve 22, which is installed at the end of the water outlet pipe 7 near the four-way valve 5. The other end of the second air blowing pipe 21 is equipped with a fourth three-way valve 23, which is installed at the end of the first return water pipe 13 near the first three-way valve 10.

[0024] During the purging phase, the third three-way valve 22 switches to the "first air blowing pipe 20 → water outlet pipe 7" passage, and the fourth three-way valve 23 switches to the "second air blowing pipe 21 → first return water pipe 13" passage. The first stream of compressed air enters the water outlet pipe 7 through the third three-way valve 22, pushing the residual water in the pipe towards the heat exchanger 3 and the spray pipe 8, and finally flows back to the water tank 2 through the second three-way valve 12 and the second return water pipe 14. The second stream of compressed air enters the first return water pipe 13 through the fourth three-way valve 23, pushing the residual water in the pipe towards the four-way valve 5, and finally flows back to the water tank 2. At this time, the four-way valve 5 closes the passage with the water inlet pipe 4 and the water supply pipe 6 to prevent the compressed air from being diverted and to ensure that the pressure is concentrated on the residual water.

[0025] By switching the passages of the third three-way valve 22 and the fourth three-way valve 23, compressed air is precisely introduced into the outlet water pipe 7 and the first return water pipe 13, thereby achieving directional air blowing and venting of the core pipeline. In conjunction with the dual return water pipeline, residual water is thoroughly removed to prevent the pipeline from freezing and cracking in low-temperature environments.

[0026] The water tank is designed with a three-layer structure. The middle layer is made of phase change insulation material, and the inner and outer layers of the water tank 2 are made of waterproof metal. The middle layer is filled with phase change insulation material (such as paraffin-expanded graphite composite material). When the water temperature is higher than the phase change temperature, the material absorbs heat and melts to store energy. When the water temperature is lower than the phase change temperature, the material releases the stored heat and solidifies, which helps to maintain the water temperature in the water tank 2 within the target range and reduces the frequency of heater start-up.

[0027] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A constant temperature component for a self-service car wash machine, comprising a body, a water tank and a heat exchanger installed inside the body, a heater installed at the bottom of the water tank, an inlet pipe extending into the water tank installed at the top of the water tank, a four-way valve installed at the top of the inlet pipe, a water supply pipe connected to the four-way valve for supplying water into the water tank, an outlet pipe connected between the four-way valve and the heat exchanger, a spray pipe extending to the outside of the body connected to the output end of the heat exchanger, a spray gun installed at the other end of the spray pipe, a first three-way valve installed at the end of the spray pipe near the heat exchanger, a temperature sensor installed on the spray pipe between the first three-way valve and the heat exchanger, a second three-way valve installed at the end of the spray pipe near the spray gun, a first return pipe connected between the four-way valve and the first three-way valve, and a second return pipe connected between the second three-way valve and the bottom of the water tank.

2. The constant temperature component of a self-service car wash machine according to claim 1, characterized in that: The heat exchanger is a miniature plate heat exchanger. The input end of the miniature plate heat exchanger is connected to an air inlet pipe that extends to the outside of the machine body. An axial flow fan is installed on the air inlet pipe.

3. The constant temperature component of a self-service car wash machine according to claim 1, characterized in that: A duckbill-type check valve is installed on the second return water pipe.

4. The constant temperature component of a self-service car wash machine according to claim 1, characterized in that: An air compressor is installed on the outer wall of the water tank. The output end of the air compressor is connected to a three-way valve, and the other two ports of the three-way valve are respectively connected to a first air blowing pipe and a second air blowing pipe.

5. A constant temperature component for a self-service car wash machine according to claim 4, characterized in that: The other end of the first air blowing pipe is equipped with a third three-way valve, which is installed at the end of the water outlet pipe near the four-way valve. The other end of the second air blowing pipe is equipped with a fourth three-way valve, which is installed at the end of the first return water pipe near the first three-way valve.

6. The constant temperature component of a self-service car wash machine according to claim 1, characterized in that: The water tank is designed with a three-layer structure, with the middle layer being a phase change insulation material.

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