Liquid cooling device of charging pile

Abstract

The invention discloses a liquid cooling device of a charging pile, and relates to the technical field of charging piles, the liquid cooling device specifically comprises a control module and a liquid cooling module, the control module comprises a radiator, a first water pump, a second water pump, a water tank and a controller, the liquid inlet end of the liquid cooling module is connected with the liquid outlet end of the second water pump through a liquid inlet pipe, and a flow meter is arranged on the liquid inlet pipe; the liquid inlet end of the second water pump is connected with a bottom water outlet of the water tank through a water inlet pipe. The liquid outlet end of the liquid cooling module is connected with the liquid inlet end of the first water pump through a liquid outlet pipe. According to the liquid cooling device of the charging pile, the controller can calculate the heat dissipation efficiency of the liquid cooling system by reading the liquid inlet temperature and the liquid outlet temperature of the liquid cooling module, meanwhile, the optimal heat dissipation effect is achieved by adjusting the rotating speed of the heat dissipation fan and the rotating speeds of the first water pump and the second water pump, and when the heat dissipation pressure of the module is small, the heat dissipation efficiency is improved. And the controller can reduce the rotating speed of the cooling fan, so that the noise is reduced while the energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a liquid cooling device for a charging pile. Background Art

[0002] With the vigorous promotion of new energy vehicles, charging piles are also being laid out on a large scale. At present, most of the AC-DC modules inside the charging piles on the market use air cooling structures for cooling. Due to the limitations of the charging pile structure, the fan size in the air cooling structure is generally small. In order to meet the heat dissipation requirements, a fan with a higher speed needs to be used, which inevitably leads to high fan noise. For residential areas, the noise will seriously affect the user experience. At the same time, the dust that cannot be completely isolated in the air duct and the water vapor in the air also adhere to the circuit board inside the module during use, affecting the heat dissipation efficiency and service life of the module. The module needs to be cleaned manually regularly, which also increases the use cost of the charging pile. To solve this problem, the prior art proposes to use liquid cooling to cool the AC-DC module inside the charging pile.

[0003] In the related art, when the liquid cooling device is in use, the coolant usually flows through the cooling pipeline arranged in the charging pile, but the temperature of the coolant gradually increases during the flow of the coolant in the cooling pipeline. Therefore, the temperature difference of the coolant at both ends of the cooling pipeline is large, which will lead to inconsistent cooling efficiency of the devices at both ends of the cooling pipeline, affecting the use effect. Based on this, the present application proposes a liquid cooling device for a charging pile. Summary of the invention

[0004] The present invention provides a liquid cooling device for a charging pile, which solves the problems in the above background technology that a large temperature difference of coolant at both ends of a cooling pipeline leads to inconsistent cooling efficiency of devices at both ends of the cooling pipeline and a large noise of a cooling fan.

[0005] The present invention provides the following technical solution: a liquid cooling device for a charging pile, comprising a control module and a liquid cooling module, the control module comprising a radiator, a water pump 1, a water pump 2, a water tank and a controller, the liquid inlet end of the liquid cooling module is connected to the liquid outlet end of the water pump 2 through a liquid inlet pipe, the liquid inlet pipe is provided with a flow meter, the liquid inlet end of the water pump 2 is connected to the water outlet at the bottom of the water tank through the water inlet pipe; the liquid outlet end of the liquid cooling module is connected to the liquid inlet end of the water pump 1 through a liquid outlet pipe, the liquid outlet pipe is provided with a pressure sensor, the liquid outlet end of the water pump 1 is connected to the liquid inlet end of the radiator through a connecting pipe, the liquid outlet end of the radiator is connected to the water inlet of the water tank through a reflux pipe, and the liquid inlet end of the liquid cooling module is provided with a temperature sensor 1, and the liquid outlet end of the liquid cooling module is provided with a temperature sensor 2;

[0006] The water tank is provided with a pressure relief valve and a liquid level switch;

[0007] The liquid cooling module includes a cooling tube, on which adjustment structures are arranged at intervals, and the adjustment structure includes a shell, a liquid inlet end tube and a liquid discharge end tube arranged on the shell, and a heat exchange tube arranged in the inner cavity of the shell, the heat exchange tube is wound around the cooling tube, and the liquid inlet end tube is connected to the liquid discharge end tube through the heat exchange tube, the liquid inlet end of the cooling tube and the liquid inlet end of the liquid inlet end tube are both connected to an end of the liquid inlet tube away from water pump 2, and the liquid outlet end of the cooling tube and the liquid outlet end of the liquid discharge end tube are both connected to an end of the liquid outlet tube away from water pump 1.

[0008] Preferably, a one-way valve is provided at one end of the liquid discharge end pipe, and the outer surfaces of the liquid discharge end pipe, the liquid inlet end pipe and the shell are all wrapped with a thermal insulation pad.

[0009] Preferably, the flow direction of the fluid in the cooling tube is opposite to the flow direction of the fluid in the heat exchange tube.

[0010] Preferably, a cooling fan is installed at the front end of the radiator.

[0011] Preferably, the pressure relief valve is installed on the top of the water tank, a water replenishment valve is provided on the top of the water tank, and an electric valve 1 is installed at the water outlet at the bottom of the water tank.

[0012] Preferably, the liquid inlet pipe is provided with an electric ball valve 2, and the electric ball valve 2 is located on a side of the flow meter away from the water pump 2.

[0013] Preferably, an electric ball valve three is provided on the connecting pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The liquid cooling device of the charging pile can calculate the heat dissipation efficiency of the liquid cooling system by reading the liquid inlet temperature and liquid outlet temperature of the liquid cooling module. At the same time, the controller can adjust the speed of the cooling fan and the speed of water pump 1 and water pump 2 to achieve the best heat dissipation effect. When the heat dissipation pressure of the module is small, the controller can reduce the speed of the cooling fan to reduce energy consumption and noise.

[0016] 2. The liquid cooling device of the charging pile can adjust the structure so that the water pump 2 can pump a part of the cooling water into the heat exchange tube. The water in the heat exchange tube cools the water in the cooling tube, shortening the temperature difference of the cooling water at both ends of the cooling tube, and improving the cooling balance at different positions in the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic block diagram of a liquid cooling device for a charging pile provided by the present invention;

[0018] Figure 2 This is a schematic diagram of a control module in an embodiment of the present invention;

[0019] Figure 3 for Figure 2 The left schematic diagram of

[0020] Figure 4 for Figure 2 Schematic diagram of the back side;

[0021] Figure 5 is a bottom view schematic diagram of a control module in an embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the cooling tube structure of the present invention.

[0023] In the figure: 1. Radiator; 2. Cooling fan; 3. Electric ball valve three; 4. Water pump one; 5. Pressure sensor; 6. Temperature sensor two; 7. Liquid cooling module; 8. Temperature sensor one; 9. Electric ball valve two; 10. Flow meter; 11. Water pump two; 12. Electric valve one; 13. Liquid level switch; 14. Pressure relief valve; 15. Water tank; 16. Reflux pipe; 17. Controller; 18. Fixed bracket; 19. Liquid outlet pipe; 20. Liquid inlet pipe; 21. Water inlet pipe; 22. Connecting pipe; 23. Cooling pipe; 24. Shell; 25. Liquid inlet end pipe; 26. Liquid discharge end pipe; 27. Heat exchange pipe; 28. Water supply valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention provides a liquid cooling device for a charging pile, comprising a control module and a liquid cooling module 7, wherein the control module comprises a radiator 1, a water pump 14, a water pump 21, a water tank 15 and a controller 17. The liquid cooling module 7 is arranged between the radiator 1 and the water tank 15, the liquid inlet end of the liquid cooling module 7 is connected to the water outlet of the water tank 15 through the water pump 21, and the liquid cooling and liquid inlet end of the liquid cooling module 7 are connected to the liquid outlet end of the water pump 21 through the liquid inlet pipe 20, and the liquid inlet pipe 20 is provided with a flow meter 10 and an electric ball valve 29, and the electric ball valve 29 is located on the side of the flow meter 10 away from the water pump 21; the liquid inlet end of the water pump 21 is connected to the water outlet at the bottom of the water tank 15 through the water inlet pipe 21, and the water outlet at the bottom of the water tank 15 is installed with an electric valve 12. Through the arrangement of the water pump 21, the operation of the water pump 21 can pump the water in the water tank 15 into the liquid cooling module 7.

[0026] The liquid outlet of the liquid cooling module 7 is connected to the liquid inlet of the radiator 1 through a water pump 4, and the liquid outlet of the liquid cooling module 7 is connected to the liquid inlet of the water pump 4 through a liquid outlet pipe 19. The liquid outlet of the water pump 4 is connected to the liquid inlet of the radiator 1 through a connecting pipe 22. The connecting pipe 22 is provided with an electric ball valve 33. Through the setting of the water pump 4, the water pump 4 can be used to pump the water discharged from the liquid cooling module 7 into the radiator 1, and the radiator 1 can cool the water. A cooling fan 2 is installed at the front end of the radiator 1 to take away the heat of the radiator 1 through air convection.

[0027] The liquid outlet of the radiator 1 is connected to the water inlet of the water tank 15 through a return pipe 16, and the cooled water flows back into the water tank 15 through the return pipe 16, so that the cooling water is circulated.

[0028] A temperature sensor 18 is provided at the liquid inlet end of the liquid cooling module 7, and a temperature sensor 26 is provided at the liquid outlet end of the liquid cooling module 7. The temperature sensor 18 can detect the liquid inlet temperature of the liquid cooling module 7, and the temperature sensor 26 can detect the liquid outlet temperature of the liquid cooling module 7. The controller can calculate the heat dissipation efficiency of the liquid cooling system by reading the liquid inlet temperature and the liquid outlet temperature of the liquid cooling module 7. At the same time, the speed of the cooling fan 2 and the speed of the water pump 14 and the water pump 211 can be adjusted to achieve the best heat dissipation effect. When the heat dissipation pressure of the liquid cooling module is small, the speed of the cooling fan 2 can be reduced to reduce energy consumption and reduce noise.

[0029] In addition, the pressure of the above-mentioned pipeline is detected in real time by using a pressure sensor 5, which is arranged on the liquid outlet pipe 19, and a pressure relief valve 14 is arranged on the top of the water tank 15. When the pressure in the pipeline is too large and exceeds the requirement, the pressure relief valve 14 can be used to discharge the air on the top of the water tank 15 to relieve the system pressure.

[0030] The water tank 15 is provided with a liquid level switch 13. Preferably, the liquid level switch 13 is provided on the side of the water tank 15. The liquid level switch 13 can detect the height of the cooling water level inside the external water tank 15. If the liquid level is lower than the liquid level required by the system, the controller 17 will receive a warning and stop the operation of the charging pile. A water replenishment valve 28 is provided on the top of the water tank 15 to facilitate the water replenishment operation of the water tank 15.

[0031] When the liquid cooling device is in use, the control module can be arranged outside the charging pile, and the structure of the control module can be as follows: Figures 2 to 5 As shown, the control module is mounted on a fixing bracket 18 , and the fixing bracket 18 is used to support the control module.

[0032] The liquid cooling module 7 is arranged in the charging pile, and the charging pile is cooled by the liquid cooling module 7. The liquid cooling module 7 includes a cooling pipe 23, and the cooling pipe 23 is arranged in the charging pile. The liquid inlet end of the cooling pipe 23 is connected to the end of the liquid inlet pipe 20 away from the water pump 11, and the liquid outlet end of the cooling pipe 23 is connected to the end of the liquid outlet pipe 19 away from the water pump 14. The water pump 11 pumps the cooling water into the cooling pipe 23. The cooling water can generate heat exchange with the components in the charging pile during the flow in the cooling pipe 23, thereby realizing the cooling of the components in the charging pile.

[0033] The cooling tube 23 is provided with an adjustment structure at intervals, and the adjustment structure includes a shell 24, a liquid inlet end tube 25 and a liquid discharge end tube 26 provided on the shell 24, and a heat exchange tube 27 provided in the inner cavity of the shell 24. The heat exchange tube 27 is wound around the cooling tube 23, and the liquid inlet end tube 25 is connected to the liquid discharge end tube 26 through the heat exchange tube 27. One end of the heat exchange tube 27 is connected to the liquid outlet end of the liquid inlet end tube 25, and the other end of the heat exchange tube 27 is connected to the liquid inlet end of the liquid discharge end tube 26. The liquid inlet end is connected to the end of the liquid inlet pipe 20 away from the water pump 11, and the liquid outlet end of the discharge end pipe 26 is connected to the end of the liquid outlet pipe 19 away from the water pump 14. The water pump 11 can pump the cooling water into the heat exchange tube 27. The cooling water in the heat exchange tube 27 and the cooling water in the cooling tube 23 can generate heat exchange, reduce the temperature of the cooling water, and thereby shorten the temperature difference of the coolant at different positions of the cooling tube 23, thereby ensuring the cooling efficiency of the charging pile. The heated water in the heat exchange tube 27 can flow back to the radiator 1.

[0034] The flow direction of the fluid in the cooling tube 23 is opposite to the flow direction of the fluid in the heat exchange tube 27, which improves the cooling efficiency. A one-way valve is provided at one end of the discharge end tube 26, and the outer surfaces of the discharge end tube 26, the liquid inlet end tube 25 and the shell 24 are all wrapped with insulation pads to reduce the impact of the external environment on the water flowing through the regulating structure.

[0035] It can be seen from the above description that when the liquid cooling module is in use, the adjustment structure can be used to cool the coolant flowing in the cooling pipe 23, thereby improving the cooling balance at different positions in the charging pile.

[0036] The electrical components involved in this application are all prior art, and technicians in this field are familiar with their connection methods. Through these technicians, all the electrical components in this application are connected to their compatible power supplies through wires, and according to the actual situation, a suitable controller is selected to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order, and the detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of the electrical control is given.

[0037] To sum up: when the liquid cooling device of the charging pile is in use, the cooling water in the water tank 15 is pumped into the liquid cooling module 7 by the water pump 11. The cooling water can cool the charging pile during the flow in the liquid cooling module 7, thereby realizing the liquid cooling operation of the charging pile. The heated water is pumped into the radiator 1 through the water pump 4, and the radiator 1 cools the water. The cooled water flows back to the water tank 15 through the reflux pipe 16, thereby realizing the recycling of water. During this process, the controller 17 can calculate the heat dissipation efficiency of the liquid cooling system by reading the liquid inlet temperature and liquid outlet temperature of the liquid cooling module 7, and achieve the best heat dissipation effect by adjusting the speed of the cooling fan 2 and the speed of the water pump 1 4 and the water pump 2 11; the liquid level switch 13 detects the water volume of the water tank 15 in real time. If the liquid level is lower than the liquid level required by the system, the controller 17 will receive a warning and stop the operation of the charging pile; when the pipeline pressure is too large and exceeds the requirement, the pressure relief valve 14 can automatically relieve the pressure, discharge the air at the top of the water tank 15, relieve the pipeline pressure, and when the cooling water flows in the cooling pipe 23, the water pump 2 11 can pump part of the cooling water into the heat exchange pipe 27, and the water in the heat exchange pipe 27 cools the water in the cooling pipe 23, shortening the temperature difference of the cooling water at the two places of the cooling pipe 23, and improving the cooling balance at different positions in the charging pile.

[0038] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid cooling device for a charging pile, comprising a control module and a liquid cooling module (7), characterized in that: The control module comprises a radiator (1), a water pump 1 (4), a water pump 2 (11), a water tank (15) and a controller (17); the liquid inlet end of the liquid cooling module (7) is connected to the liquid outlet end of the water pump 2 (11) via a liquid inlet pipe (20); a flow meter (10) is provided on the liquid inlet pipe (20); the liquid inlet end of the water pump 2 (11) is connected to the water outlet at the bottom of the water tank (15) via a water inlet pipe (21); the liquid outlet end of the liquid cooling module (7) is connected to the water pump 1 (4); ) is connected to the liquid inlet end of the liquid cooling module (7) through a liquid outlet pipe (19), the liquid outlet pipe (19) is provided with a pressure sensor (5), the liquid outlet end of the water pump (4) is connected to the liquid inlet end of the radiator (1) through a connecting pipe (22), the liquid outlet end of the radiator (1) is connected to the water inlet of the water tank (15) through a return pipe (16), and the liquid inlet end of the liquid cooling module (7) is provided with a temperature sensor (8), and the liquid outlet end of the liquid cooling module (7) is provided with a temperature sensor (6); The water tank (15) is provided with a pressure relief valve (14) and a liquid level switch (13); The liquid cooling module (7) comprises a cooling tube (23), and an adjustment structure is arranged at intervals on the cooling tube (23). The adjustment structure comprises a shell (24), a liquid inlet end tube (25) and a liquid discharge end tube (26) arranged on the shell (24), and a heat exchange tube (27) arranged in the inner cavity of the shell (24). The heat exchange tube (27) is wound around the cooling tube (23), and the liquid inlet end tube (25) and the liquid discharge end tube (26) are connected through the heat exchange tube (27). The liquid inlet end of the cooling tube (23) and the liquid inlet end of the liquid inlet end tube (25) are both connected to an end of the liquid inlet tube (20) away from the second water pump (11), and the liquid outlet end of the cooling tube (23) and the liquid outlet end of the liquid discharge end tube (26) are both connected to an end of the liquid outlet tube (19) away from the first water pump (4).

2. The liquid cooling device for a charging pile according to claim 1, characterized in that: A one-way valve is provided at one end of the liquid discharge end pipe (26), and the outer surfaces of the liquid discharge end pipe (26), the liquid inlet end pipe (25) and the shell (24) are all wrapped with a heat insulation pad.

3. The liquid cooling device of a charging pile according to claim 1, characterized in that: The flow direction of the fluid in the cooling tube (23) is opposite to the flow direction of the fluid in the heat exchange tube (27).

4. The liquid cooling device for a charging pile according to claim 1, characterized in that: A cooling fan (2) is installed at the front end of the radiator (1).

5. The liquid cooling device for a charging pile according to claim 1, characterized in that: The pressure relief valve (14) is installed on the top of the water tank (15), a water supply valve (28) is provided on the top of the water tank (15), and an electric valve (12) is installed at the water outlet at the bottom of the water tank (15).

6. The liquid cooling device for a charging pile according to claim 1, characterized in that: The liquid inlet pipe (20) is provided with an electric ball valve 2 (9), and the electric ball valve 2 (9) is located on a side of the flow meter (10) away from the water pump 2 (11).

7. The liquid cooling device of a charging pile according to claim 1, characterized in that: The connecting pipe (22) is provided with an electric ball valve three (3).

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