Liquid cooling system and control method

Abstract

The invention relates to the technical field of air conditioners, in particular to a liquid cooling system and a control method. The liquid cooling system comprises a compressor, a four-way valve, a plate heat exchanger, a driving plate, a fin heat exchanger, a first electronic expansion valve, a second electronic expansion valve and a first temperature sensor. Wherein the compressor is communicated with the plate heat exchanger through the four-way valve, one end of the driving plate is communicated with the plate heat exchanger, the other end of the driving plate is communicated with the fin heat exchanger, and the fin heat exchanger is communicated with the compressor through the four-way valve. The first electronic expansion valve is arranged between the driving plate and the plate heat exchanger, the second electronic expansion valve is arranged between the driving plate and the fin heat exchanger, the first temperature sensor is arranged between the second electronic expansion valve and the driving plate, and the first temperature sensor is used for detecting the temperature of a refrigerant between the second electronic expansion valve and the driving plate. The liquid cooling system can improve the heat dissipation efficiency of the drive board, improve the operation capability of the unit and save the cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a liquid cooling system and a control method. Background Art

[0002] At present, the thermal management module in the air conditioner is usually provided with a driver board, which is used to control the start and stop of the device and adjust the operating status of the device. In the prior art, the driver board usually dissipates heat by air cooling. When the air conditioner is running in cooling mode in summer, the outdoor unit needs to release heat as a condenser. In this way, the heat generated by the outdoor unit will reduce the cooling effect of the driver board, thereby reducing the heat dissipation efficiency of the driver board, affecting the performance of the unit and increasing costs.

[0003] Therefore, it is urgent to design a liquid cooling system and a control method to solve the above technical problems. Summary of the invention

[0004] The first object of the present invention is to provide a liquid cooling system, which can improve the heat dissipation efficiency of the drive plate, improve the operating capacity of the unit, and save costs.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides a liquid cooling system, comprising a compressor, a four-way valve, a plate heat exchanger, a driving plate and a fin heat exchanger; the compressor is connected to the plate heat exchanger through the four-way valve, one end of the driving plate is connected to the plate heat exchanger, and the other end is connected to the fin heat exchanger, and the fin heat exchanger is connected to the compressor through the four-way valve;

[0007] a first electronic expansion valve, the first electronic expansion valve being arranged between the driving plate and the plate heat exchanger;

[0008] a second electronic expansion valve, the second electronic expansion valve being arranged between the driving plate and the fin heat exchanger;

[0009] A first temperature sensor is provided between the second electronic expansion valve and the driving board, and is used to detect the temperature of the refrigerant between the second electronic expansion valve and the driving board.

[0010] As an optional technical solution for a liquid cooling system, the liquid cooling system has a heating mode, and the four-way valve has ports a, b, c and d. The port a is connected to the exhaust port of the compressor, and the port a is connected to the plate heat exchanger through the port d. The port b is connected to the fin heat exchanger, and the port b is connected to the intake port of the compressor through the port c.

[0011] As an optional technical solution of the liquid cooling system, the liquid cooling system further includes an intake temperature sensor and a second temperature sensor, the intake temperature sensor is arranged between the intake port of the compressor and the four-way valve, and the intake temperature sensor is used to detect the temperature of the refrigerant entering the intake port of the compressor;

[0012] The second temperature sensor is arranged on the fin heat exchanger, and the second temperature sensor is used to detect the coil temperature in the fin heat exchanger;

[0013] The suction superheat of the compressor is equal to the difference between the refrigerant temperature at the suction port of the compressor and the coil temperature in the fin heat exchanger.

[0014] As an optional technical solution for a liquid cooling system, the liquid cooling system has a refrigeration mode, the four-way valve has port a, port b, port c and port d, the port a is connected to the exhaust port of the compressor, the port a is connected to the port b, the port b is connected to the fin heat exchanger, and the port d is connected to the intake port of the compressor through the port c.

[0015] As an optional technical solution of the liquid cooling system, the liquid cooling system further includes an intake temperature sensor and a third temperature sensor, wherein the intake temperature sensor is arranged between the intake port of the compressor and the four-way valve, and the intake temperature sensor is used to detect the temperature of the refrigerant entering the intake port of the compressor;

[0016] The third temperature sensor is disposed between the first electronic expansion valve and the plate heat exchanger, and the third temperature sensor is used to detect the temperature of the refrigerant between the first electronic expansion valve and the plate heat exchanger;

[0017] The suction superheat of the compressor is equal to the difference between the refrigerant temperature at the suction port of the compressor and the temperature of the refrigerant between the first electronic expansion valve and the plate heat exchanger.

[0018] As an optional technical solution of the liquid cooling system, the liquid cooling system further includes a controller, and the controller is electrically connected to the first electronic expansion valve, the second electronic expansion valve and the first temperature sensor.

[0019] As an optional technical solution for a liquid cooling system, the liquid cooling system further includes an air conditioning water inlet pipe and an air conditioning water outlet pipe, and the air conditioning water inlet pipe and the air conditioning water outlet pipe are both connected to the plate heat exchanger.

[0020] The second purpose of the present invention is to propose a control method for a liquid cooling system. The control method for the liquid cooling system has simple steps and can improve the heat dissipation efficiency of the drive plate in both heating mode and cooling mode, improve the operating capacity of the unit, and achieve the purpose of cost saving.

[0021] To achieve this object, the present invention adopts the following technical solutions:

[0022] The present invention provides a control method for a liquid cooling system, which is applied to the liquid cooling system described in any of the above optional technical solutions, and the control method for the liquid cooling system includes:

[0023] When the unit is running in heating mode, the first electronic expansion valve is opened to the maximum, and the unit is run for a preset time;

[0024] Acquire the temperature of the first temperature sensor; when the temperature of the first temperature sensor is greater than the first preset temperature, the first electronic expansion valve closes 5% of the current opening every 15 seconds until the temperature of the first temperature sensor is less than the second preset temperature, and the first electronic expansion valve maintains the current opening unchanged;

[0025] or,

[0026] When the unit operates in cooling mode, the second electronic expansion valve is opened to the maximum, and the unit is operated for a preset time;

[0027] Obtain the temperature of the first temperature sensor; when the temperature of the first temperature sensor is greater than the first preset temperature, the second electronic expansion valve closes 5% of the current opening every 15 seconds until the temperature of the first temperature sensor is less than the second preset temperature, and the second electronic expansion valve maintains the current opening unchanged.

[0028] As an optional technical solution for a control method of a liquid cooling system, the maximum opening of the first electronic expansion valve is the same as the maximum opening of the second electronic expansion valve, and the maximum opening of the first electronic expansion valve and the maximum opening of the second electronic expansion valve are both 480P.

[0029] As an optional technical solution of a control method for a liquid cooling system, the preset time is set to 30 seconds to 120 seconds; the first preset temperature is set to 55°C, and the second preset temperature is set to 50°C.

[0030] The beneficial effects of the present invention include at least:

[0031] The present invention provides a liquid cooling system, which includes a compressor, a four-way valve, a plate heat exchanger, a drive plate, a fin heat exchanger, a first electronic expansion valve, a second electronic expansion valve and a first temperature sensor. The compressor is connected to the plate heat exchanger through the four-way valve, one end of the drive plate is connected to the plate heat exchanger, and the other end is connected to the fin heat exchanger, and the fin heat exchanger is connected to the compressor through the four-way valve. The first electronic expansion valve is arranged between the drive plate and the plate heat exchanger, the second electronic expansion valve is arranged between the drive plate and the fin heat exchanger, the first temperature sensor is arranged between the second electronic expansion valve and the drive plate, and the first temperature sensor is used to detect the temperature of the refrigerant between the second electronic expansion valve and the drive plate.

[0032] As mentioned above, when the liquid cooling system operates in the heating mode, the first electronic expansion valve can dynamically adjust the opening of the first electronic expansion valve according to the temperature value of the first temperature sensor, so that the refrigerant flowing through the first electronic expansion valve can be throttled and depressurized from a high-temperature and high-pressure liquid state to a low-temperature and low-pressure gas-liquid mixed state, thereby reducing the temperature and pressure of the refrigerant, so that the refrigerant that subsequently flows through the drive plate can effectively take away the heat of the drive plate, and improve the heat dissipation efficiency of the drive plate. In other words, through the throttling and depressurization of the refrigerant by the first electronic expansion valve, the temperature of the refrigerant can form a temperature difference with the temperature of the drive plate, thereby taking away the heat of the drive plate, and realizing the liquid cooling and heat dissipation effect on the drive plate. At the same time, through the temperature feedback of the refrigerant flowing out of the drive plate by the first temperature sensor, the first electronic expansion valve can realize the function of dynamically adjusting the opening, that is, it can dynamically adjust the temperature of the refrigerant flowing into the drive plate, thereby ensuring the heat dissipation effect of the drive plate, improving the unit operation capacity, and saving costs.

[0033] When the liquid cooling system operates in the refrigeration mode, the second electronic expansion valve can dynamically adjust the opening of the second electronic expansion valve according to the temperature value of the first temperature sensor, so that the refrigerant flowing through the second electronic expansion valve can be throttled and depressurized from a high-temperature and high-pressure liquid state to a low-temperature and low-pressure gas-liquid mixed state, thereby reducing the temperature and pressure of the refrigerant, so that the refrigerant flowing through the drive plate can effectively take away the heat of the drive plate and improve the heat dissipation efficiency of the drive plate. In other words, through the throttling and depressurization of the refrigerant by the second electronic expansion valve, the refrigerant temperature can form a temperature difference with the temperature of the drive plate, thereby taking away the heat of the drive plate and realizing the liquid cooling and heat dissipation effect on the drive plate. At the same time, through the first temperature sensor to the temperature of the refrigerant flowing into the drive plate (that is, the temperature of the refrigerant after the second electronic expansion valve throttling and depressurization) feedback, the second electronic expansion valve can realize the function of dynamically adjusting the opening, that is, it can dynamically adjust the temperature of the refrigerant flowing into the drive plate, thereby ensuring the heat dissipation effect of the drive plate, improving the unit operation capacity, and saving costs.

[0034] The present invention also provides a control method for a liquid cooling system. The control method for the liquid cooling system has simple steps and can improve the heat dissipation efficiency of the drive plate in both the heating mode and the cooling mode, thereby improving the operating capacity of the unit and achieving the purpose of cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0036] Figure 1 is a schematic diagram of a liquid cooling system provided by an embodiment of the present invention in a heating mode;

[0037] Figure 2 Schematic diagram of a liquid cooling system in a cooling mode provided by an embodiment of the present invention.

[0038] Reference numerals

[0039] 10. Compressor; 20. Four-way valve; 30. Plate heat exchanger; 31. Air conditioning water inlet pipe; 32. Air conditioning water outlet pipe; 40. Drive plate; 50. Fin heat exchanger; 60. First electronic expansion valve; 70. Second electronic expansion valve; 80. First temperature sensor; 90. Second temperature sensor; 100. Third temperature sensor; 110. Intake temperature sensor. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] This embodiment provides a liquid cooling system, which can improve the heat dissipation efficiency of the drive plate, improve the operating capacity of the unit, and save costs.

[0048] like Figure 1-Figure 2As shown, the liquid cooling system mainly includes a compressor 10, a four-way valve 20, a plate heat exchanger 30, a driving plate 40, a fin heat exchanger 50, a first electronic expansion valve 60, a second electronic expansion valve 70 and a first temperature sensor 80. The compressor 10 is connected to the plate heat exchanger 30 through the four-way valve 20, one end of the driving plate 40 is connected to the plate heat exchanger 30, and the other end is connected to the fin heat exchanger 50, and the fin heat exchanger 50 is connected to the compressor 10 through the four-way valve 20.

[0049] The first electronic expansion valve 60 is arranged between the driving plate 40 and the plate heat exchanger 30, the second electronic expansion valve 70 is arranged between the driving plate 40 and the fin heat exchanger 50, and the first temperature sensor 80 is arranged between the second electronic expansion valve 70 and the driving plate 40. The first temperature sensor 80 is used to detect the temperature of the refrigerant between the second electronic expansion valve 70 and the driving plate 40.

[0050] Based on the above design, in this embodiment, when the liquid cooling system operates in the heating mode, the first electronic expansion valve 60 can dynamically adjust the opening of the first electronic expansion valve 60 according to the temperature value of the first temperature sensor 80, so that the refrigerant flowing through the first electronic expansion valve 60 can be throttled and depressurized from a high-temperature and high-pressure liquid state to a low-temperature and low-pressure gas-liquid mixed state, thereby reducing the temperature and pressure of the refrigerant, so that the refrigerant subsequently flowing through the drive plate 40 can effectively take away the heat of the drive plate 40, and improve the heat dissipation efficiency of the drive plate 40. In other words, through the throttling and depressurization of the refrigerant by the first electronic expansion valve 60, the temperature of the refrigerant can form a temperature difference with the temperature of the drive plate 40, thereby taking away the heat of the drive plate 40, and realizing the liquid cooling and heat dissipation effect on the drive plate 40.

[0051] At the same time, by means of the first temperature sensor 80 providing temperature feedback on the refrigerant flowing out of the drive plate 40, the first electronic expansion valve 60 can dynamically adjust the opening degree, that is, it can dynamically adjust the temperature of the refrigerant flowing into the drive plate 40, thereby ensuring the heat dissipation effect on the drive plate 40, improving the operating capacity of the unit and saving costs.

[0052] When the liquid cooling system operates in the cooling mode, the second electronic expansion valve 70 can dynamically adjust the opening of the second electronic expansion valve 70 according to the temperature value of the first temperature sensor 80, so that the refrigerant flowing through the second electronic expansion valve 70 can be throttled and depressurized from a high-temperature and high-pressure liquid state to a low-temperature and low-pressure gas-liquid mixed state, thereby reducing the temperature and pressure of the refrigerant, so that the refrigerant subsequently flowing through the drive board 40 can effectively take away the heat of the drive board 40, and improve the heat dissipation efficiency of the drive board 40. In other words, through the throttling and depressurization of the refrigerant by the second electronic expansion valve 70, the temperature of the refrigerant can form a temperature difference with the temperature of the drive board 40, thereby taking away the heat of the drive board 40, and realizing the liquid cooling and heat dissipation effect on the drive board 40.

[0053] At the same time, by feedback from the first temperature sensor 80 on the temperature of the refrigerant flowing into the drive plate 40 (i.e., the temperature of the refrigerant after throttling and pressure reduction by the second electronic expansion valve 70), the second electronic expansion valve 70 can dynamically adjust the opening degree, that is, it can dynamically adjust the temperature of the refrigerant flowing into the drive plate 40, thereby ensuring the heat dissipation effect of the drive plate 40, improving the operating capacity of the unit and saving costs.

[0054] As described above, when the liquid cooling system is in the heating mode, the first temperature sensor 80 detects the temperature of the refrigerant flowing out of the driving plate 40, and the first electronic expansion valve 60 dynamically adjusts its opening according to the temperature of the first temperature sensor 80, thereby dynamically adjusting the temperature of the refrigerant flowing into the driving plate 40, and improving the heat dissipation effect of the driving plate 40; when the liquid cooling system is in the cooling mode, the first temperature sensor 80 detects the temperature of the refrigerant flowing into the driving plate 40, and at this time, the second electronic expansion valve 70 dynamically adjusts its opening according to the temperature of the first temperature sensor 80, thereby dynamically adjusting the temperature of the refrigerant flowing into the driving plate 40, and improving the heat dissipation effect of the driving plate 40. In this way, the liquid cooling system can ensure the liquid cooling heat dissipation effect of the driving plate 40 regardless of whether it is in the heating mode or the cooling mode, improves the flexibility and applicability, improves the operation capacity of the unit, and saves costs.

[0055] The liquid cooling system in this embodiment further includes a controller, which is electrically connected to the first electronic expansion valve 60, the second electronic expansion valve 70 and the first temperature sensor 80. Through the setting of the controller, the first temperature sensor 80 can feed back the detected refrigerant temperature to the controller in real time, and then the controller dynamically adjusts the opening of the first electronic expansion valve 60 and the second electronic expansion valve 70 according to the temperature data to throttle and reduce the pressure of the refrigerant, ensure the heat dissipation liquid cooling effect of the drive board 40, and improve the heat dissipation efficiency.

[0056] Optionally, the controller in this embodiment can be set to a PLC controller commonly available on the market, so its structure and working principle will not be described in detail here.

[0057] like Figure 1 As shown, in this embodiment, the four-way valve 20 has ports a, b, c and d, port a is connected to the exhaust port of the compressor 10, and port a is connected to the plate heat exchanger 30 through port d, port b is connected to the fin heat exchanger 50, and port b is connected to the suction port of the compressor 10 through port c. When the liquid cooling system is in the heating mode, the flow direction of the refrigerant in the liquid cooling system is as follows: Figure 1 Indicated by the direction of the arrow.

[0058] Furthermore, the liquid cooling system in this embodiment also includes an intake temperature sensor 110 and a second temperature sensor 90. The intake temperature sensor 110 is arranged between the intake port of the compressor 10 and the four-way valve 20, and the intake temperature sensor 110 is used to detect the temperature of the refrigerant entering the intake port of the compressor 10. The second temperature sensor 90 is arranged on the fin heat exchanger 50, and the second temperature sensor 90 is used to detect the coil temperature in the fin heat exchanger 50. In this way, the refrigerant liquid supply amount of the fin heat exchanger 50 can be controlled according to "the intake superheat of the compressor 10 = the refrigerant temperature of the intake port of the compressor 10 - the coil temperature in the fin heat exchanger 50", thereby ensuring that the refrigerant liquid supply amount of the fin heat exchanger 50 meets the requirements.

[0059] Furthermore, in the heating mode, the second electronic expansion valve 70 is controlled so that the second electronic expansion valve 70 can dynamically adjust its own opening according to the suction superheat of the compressor 10, thereby ensuring that the refrigerant supply to the fin heat exchanger 50 meets the requirements to ensure stable operation of the unit.

[0060] like Figure 2 As shown, in this embodiment, the four-way valve 20 has ports a, b, c and d, port a is connected to the exhaust port of the compressor 10, port a is connected to port b, port b is connected to the fin heat exchanger 50, and port d is connected to the suction port of the compressor 10 through port c. When the liquid cooling system is in the cooling mode, the flow direction of the refrigerant in the liquid cooling system is as follows: Figure 2 Indicated by the direction of the arrow.

[0061] Furthermore, the liquid cooling system in this embodiment further includes an intake air temperature sensor 110 and a third temperature sensor 100. The intake air temperature sensor 110 is arranged between the intake port of the compressor 10 and the four-way valve 20, and the intake air temperature sensor 110 is used to detect the temperature of the refrigerant entering the intake port of the compressor 10. The third temperature sensor 100 is arranged between the first electronic expansion valve 60 and the plate heat exchanger 30, and the third temperature sensor 100 is used to detect the temperature of the refrigerant between the first electronic expansion valve 60 and the plate heat exchanger 30. In this way, the refrigerant liquid supply amount of the plate heat exchanger 30 can be controlled according to "the intake air superheat of the compressor 10 = the refrigerant temperature of the intake port of the compressor 10 - the temperature of the refrigerant between the first electronic expansion valve 60 and the plate heat exchanger 30", thereby ensuring that the refrigerant liquid supply amount of the plate heat exchanger 30 meets the requirements.

[0062] Optionally, the third temperature sensor 100 in this embodiment can also be set on the plate heat exchanger 30 to detect the temperature of the refrigerant flowing into the coil of the plate heat exchanger 30, thereby improving the integration and compactness of the liquid cooling system and saving installation space.

[0063] Furthermore, in the refrigeration mode, the first electronic expansion valve 60 is controlled so that the first electronic expansion valve 60 can dynamically adjust its own opening according to the suction superheat of the compressor 10, thereby ensuring that the refrigerant supply volume of the plate heat exchanger 30 meets the requirements to ensure stable operation of the unit.

[0064] like Figure 1-Figure 2 As shown, in this embodiment, the liquid cooling system further includes an air conditioning water inlet pipe 31 and an air conditioning water outlet pipe 32, and the air conditioning water inlet pipe 31 and the air conditioning water outlet pipe 32 are both connected to the plate heat exchanger 30. The arrangement of the air conditioning water inlet pipe 31 and the air conditioning water outlet pipe 32 can ensure that the plate heat exchanger 30 has sufficient cooling water for heat exchange, thereby ensuring that the unit can operate stably.

[0065] This embodiment further provides a control method for a liquid cooling system, which is applied to the above-mentioned liquid cooling system. The control method for the liquid cooling system includes:

[0066] When the unit operates in heating mode, the opening degree of the first electronic expansion valve 60 is opened to the maximum, and the unit operates for a preset time.

[0067] Specifically, at this time, the opening of the first electronic expansion valve 60 is opened to 480P, and the preset time of the unit operation can be set to 30 seconds to 120 seconds. This can make the refrigerant in the unit flow stably, which is beneficial to improve the accuracy of the refrigerant temperature detected by the subsequent first temperature sensor 80, ensure the stability of the unit operation, and improve the operating capacity.

[0068] Obtain the temperature of the first temperature sensor 80; when the temperature of the first temperature sensor 80 is greater than the first preset temperature, the first electronic expansion valve 60 closes 5% of the current opening every 15 seconds, thereby gradually improving the throttling and pressure reduction effect on the refrigerant, and reducing the temperature and pressure of the refrigerant until the refrigerant temperature detected by the first temperature sensor 80 is less than the second preset temperature. At this time, the opening of the first electronic expansion valve 60 is controlled to maintain the current opening unchanged, thereby improving the liquid cooling heat dissipation effect of the refrigerant on the drive plate 40.

[0069] Optionally, in this embodiment, the first preset temperature can be set to 55°C, and the second preset temperature can be set to 50°C.

[0070] When the unit operates in cooling mode, the opening degree of the second electronic expansion valve 70 is opened to the maximum, and the unit operates for a preset time.

[0071] Specifically, at this time, the opening of the second electronic expansion valve 70 is opened to 480P, and the preset time of the unit operation can be set to 30 seconds to 120 seconds. This can make the refrigerant in the unit flow stably, which is beneficial to improve the accuracy of the refrigerant temperature detected by the subsequent first temperature sensor 80, ensure the stability of the unit operation, and improve the operating capacity.

[0072] Obtain the temperature of the first temperature sensor 80; when the temperature of the first temperature sensor 80 is greater than the first preset temperature, the second electronic expansion valve 70 closes 5% of the current opening every 15 seconds, thereby gradually improving the throttling and pressure reduction effect on the refrigerant, and reducing the temperature and pressure of the refrigerant until the refrigerant temperature detected by the first temperature sensor 80 is less than the second preset temperature. At this time, the opening of the second electronic expansion valve 70 is controlled to maintain the current opening unchanged, thereby improving the liquid cooling heat dissipation effect of the refrigerant on the drive plate 40.

[0073] Optionally, in this embodiment, the first preset temperature can be set to 55°C, and the second preset temperature can be set to 50°C.

[0074] The control method of the liquid cooling system in this embodiment has simple steps, and can improve the heat dissipation efficiency of the drive plate 40 in both the heating mode and the cooling mode, thereby improving the operating capacity of the unit and achieving the purpose of cost saving.

[0075] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0076] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. Liquid cooling system, characterized in that, The invention comprises a compressor (10), a four-way valve (20), a plate heat exchanger (30), a driving plate (40) and a fin heat exchanger (50); the compressor (10) is connected to the plate heat exchanger (30) through the four-way valve (20); one end of the driving plate (40) is connected to the plate heat exchanger (30) and the other end is connected to the fin heat exchanger (50); the fin heat exchanger (50) is connected to the compressor (10) through the four-way valve (20); a first electronic expansion valve (60), the first electronic expansion valve (60) being arranged between the driving plate (40) and the plate heat exchanger (30); a second electronic expansion valve (70), the second electronic expansion valve (70) being arranged between the driving plate (40) and the fin heat exchanger (50); A first temperature sensor (80), wherein the first temperature sensor (80) is disposed between the second electronic expansion valve (70) and the driving plate (40), and the first temperature sensor (80) is used to detect the temperature of the refrigerant between the second electronic expansion valve (70) and the driving plate (40).

2. The liquid cooling system according to claim 1, characterized in that: The liquid cooling system has a heating mode, and the four-way valve (20) has a port a, a port b, a port c and a port d, the port a is connected to the exhaust port of the compressor (10), and the port a is connected to the plate heat exchanger (30) through the port d, the port b is connected to the fin heat exchanger (50), and the port b is connected to the intake port of the compressor (10) through the port c.

3. The liquid cooling system according to claim 2, characterized in that: The liquid cooling system further comprises an intake temperature sensor (110) and a second temperature sensor (90), wherein the intake temperature sensor (110) is arranged between the intake port of the compressor (10) and the four-way valve (20), and the intake temperature sensor (110) is used to detect the temperature of the refrigerant entering the intake port of the compressor (10); The second temperature sensor (90) is arranged on the fin heat exchanger (50), and the second temperature sensor (90) is used to detect the temperature of the coil in the fin heat exchanger (50); The suction superheat of the compressor (10) is equal to the difference between the refrigerant temperature at the suction port of the compressor (10) and the coil temperature in the fin heat exchanger (50).

4. The liquid cooling system according to claim 1, characterized in that: The liquid cooling system has a cooling mode, and the four-way valve (20) has ports a, b, c and d, the port a being connected to the exhaust port of the compressor (10), the port a being connected to the port b, the port b being connected to the fin heat exchanger (50), and the port d being connected to the intake port of the compressor (10) through the port c.

5. The liquid cooling system according to claim 4, characterized in that: The liquid cooling system further comprises an intake temperature sensor (110) and a third temperature sensor (100), wherein the intake temperature sensor (110) is arranged between the intake port of the compressor (10) and the four-way valve (20), and the intake temperature sensor (110) is used to detect the temperature of the refrigerant entering the intake port of the compressor (10); The third temperature sensor (100) is arranged between the first electronic expansion valve (60) and the plate heat exchanger (30), and the third temperature sensor (100) is used to detect the temperature of the refrigerant between the first electronic expansion valve (60) and the plate heat exchanger (30); The suction superheat of the compressor (10) is equal to the difference between the refrigerant temperature at the suction port of the compressor (10) and the temperature of the refrigerant between the first electronic expansion valve (60) and the plate heat exchanger (30).

6. The liquid cooling system according to any one of claims 1 to 5, characterized in that: The liquid cooling system further comprises a controller, wherein the controller is electrically connected to the first electronic expansion valve (60), the second electronic expansion valve (70) and the first temperature sensor (80).

7. The liquid cooling system according to any one of claims 1 to 5, characterized in that: The liquid cooling system further comprises an air conditioning water inlet pipe (31) and an air conditioning water outlet pipe (32), and both the air conditioning water inlet pipe (31) and the air conditioning water outlet pipe (32) are in communication with the plate heat exchanger (30).

8. A method for controlling a liquid cooling system, characterized in that: The control method of the liquid cooling system is applied to the liquid cooling system according to any one of claims 1 to 7, and the control method of the liquid cooling system comprises: When the unit is running in heating mode, the first electronic expansion valve (60) is opened to the maximum, and the unit is run for a preset time; Acquiring the temperature of the first temperature sensor (80); when the temperature of the first temperature sensor (80) is greater than a first preset temperature, the first electronic expansion valve (60) closes 5% of the current opening every 15 seconds until the temperature of the first temperature sensor (80) is less than a second preset temperature, and the first electronic expansion valve (60) maintains the current opening unchanged; or, When the unit operates in cooling mode, the second electronic expansion valve (70) is opened to the maximum, and the unit is operated for a preset time; The temperature of the first temperature sensor (80) is obtained; when the temperature of the first temperature sensor (80) is greater than a first preset temperature, the second electronic expansion valve (70) closes 5% of the current opening every 15 seconds until the temperature of the first temperature sensor (80) is less than a second preset temperature, and the second electronic expansion valve (70) maintains the current opening unchanged.

9. The control method of the liquid cooling system according to claim 8, characterized in that: The maximum opening of the first electronic expansion valve (60) and the maximum opening of the second electronic expansion valve (70) are the same, and the maximum opening of the first electronic expansion valve (60) and the maximum opening of the second electronic expansion valve (70) are both 480P.

10. The control method of the liquid cooling system according to claim 8, characterized in that: The preset time is set to 30 seconds to 120 seconds; the first preset temperature is set to 55° C., and the second preset temperature is set to 50° C.

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