Heat pump system and heat dissipation control method

Abstract

The invention relates to a heat pump system and a heat dissipation control method.The heat pump system comprises a refrigerant circulation loop, an electric controller and a heat dissipation structure, the refrigerant circulation loop is used for making a refrigerant circulate in a loop at least composed of a compressor, a condenser and a heat exchanger, and the electric controller is at least used for controlling the compressor; the heat dissipation structure is used for dissipating heat of a radiator of the electric controller. The heat dissipation structure comprises a water-cooling heat dissipation loop, a water inlet of the water-cooling heat dissipation loop is communicated with the water outlet end of the heat exchanger, a water outlet of the water-cooling heat dissipation loop is communicated with the water inlet end of the heat exchanger, a water pump is arranged on the water-cooling heat dissipation loop, and a radiator of the electric controller is arranged in the water-cooling heat dissipation loop. And the water-cooling heat dissipation loop is used for receiving water output by the heat exchanger and outputting the water to the water inlet end of the heat exchanger after water-cooling heat dissipation is carried out on the radiator of the electric controller. The heat dissipation efficiency is high, the heat dissipation mode is environment-friendly, the temperature of the electric controller can be better reduced, and the working reliability of the heat pump system is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump systems, and in particular to a heat pump system and a heat dissipation control method. Background Art

[0002] The heat pump system is an efficient and energy-saving device that can transfer low-grade thermal energy to high-grade thermal energy, and through a reverse cycle, it allows heat to flow from low-temperature objects to high-temperature objects, providing users with usable high-grade thermal energy. It is widely used in heating, cooling, and domestic hot water supply.

[0003] The electronic controller is the core component of the heat pump system. It can realize data exchange with the components in the heat pump system and control the operation of each component in the heat pump system so that the heat pump system can work normally. However, after working for a period of time or being affected by other factors such as ambient temperature, the temperature of the electronic controller will continue to rise. Although some electronic controllers are equipped with radiators, when the temperature of the electronic controller is too high, the radiator cannot dissipate heat in time, and the cooling effect on the electronic controller is poor. If the temperature of the electronic controller is too high, it will affect the working performance of the electronic controller and even cause damage to the electronic controller, resulting in low working reliability of the heat pump system. Summary of the invention

[0004] Based on this, it is necessary to provide a heat pump system and a heat dissipation control method with high working reliability in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a heat pump system, comprising:

[0006] A refrigerant circulation loop, for circulating the refrigerant in a loop consisting of at least a compressor, a condenser and a heat exchanger;

[0007] An electronic controller, at least used to control the compressor;

[0008] A heat dissipation structure, used for dissipating heat from a radiator of the electronic controller;

[0009] Wherein, the heat dissipation structure comprises:

[0010] A water-cooling heat dissipation circuit, wherein the water inlet of the water-cooling heat dissipation circuit is connected to the water outlet of the heat exchanger, and the water outlet of the water-cooling heat dissipation circuit is connected to the water inlet of the heat exchanger; a water pump is provided on the water-cooling heat dissipation circuit; the radiator of the electronic controller is provided in the water-cooling heat dissipation circuit;

[0011] The water cooling circuit is used to receive the water output by the heat exchanger, and after water cooling the radiator of the electronic controller, output the water to the water inlet end of the heat exchanger.

[0012] In a second aspect, the present application further provides a heat dissipation control method, which is implemented based on the heat pump system of any of the above embodiments, and the method includes:

[0013] Receive water cooling start signal;

[0014] In response to the water cooling start signal, the water cooling heat dissipation circuit is controlled to work, so that the water cooling heat dissipation circuit is connected to the water output by the heat exchanger, and after the radiator of the electronic controller is water-cooled and dissipated, the water is output to the water inlet end of the heat exchanger.

[0015] The heat pump system and heat dissipation control method described above, the heat pump system includes a refrigerant circulation loop, an electric controller and a heat dissipation structure, the refrigerant circulation loop is used to circulate the refrigerant in a loop composed of at least a compressor, a condenser and a heat exchanger, the electric controller is at least used to control the compressor, and the heat dissipation structure is used to dissipate heat from the radiator of the electric controller. Among them, the heat dissipation structure includes a water-cooled heat dissipation loop, the water inlet of the water-cooled heat dissipation loop is connected to the water outlet of the heat exchanger, the water outlet of the water-cooled heat dissipation loop is connected to the water inlet of the heat exchanger, a water pump is provided on the water-cooled heat dissipation loop, the radiator of the electric controller is provided in the water-cooled heat dissipation loop, the water-cooled heat dissipation loop is used to receive the water output by the heat exchanger, and after water-cooling the radiator of the electric controller, the water is output to the water inlet of the heat exchanger. Therefore, the outlet water of the heat exchanger is used to perform water cooling on the radiator of the electronic controller, which has high heat dissipation efficiency and is environmentally friendly. It can effectively reduce the temperature of the radiator of the electronic controller, and the water after the heat is dissipated by the radiator of the electronic controller is output to the water inlet end of the heat exchanger, so that the waste heat of the radiator of the electronic controller can be recovered, thereby improving the heat exchange efficiency, better reducing the temperature of the electronic controller, and effectively improving the working reliability of the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a heat pump system in one embodiment;

[0017] Figure 2 is a schematic structural diagram of a heat pump system in another embodiment;

[0018] Figure 3 is a partially enlarged schematic diagram of a first branch in one embodiment;

[0019] Figure 4 is a flow chart of a heat dissipation control method in one embodiment;

[0020] Figure 5 A schematic flow chart of steps for controlling the operation of a water cooling and heat dissipation circuit in one embodiment;

[0021] Figure 6 A schematic flow chart of steps for controlling the operation of a water cooling and heat dissipation circuit in another embodiment;

[0022] Figure 7 A schematic flow chart of steps for controlling the operation of a water cooling and heat dissipation circuit in yet another embodiment;

[0023] Figure 8 A schematic flow chart of steps for controlling the flow state of a water cooling and heat dissipation circuit according to a working mode of a heat pump system in one embodiment;

[0024] Fig. 9 A schematic flow chart of steps for controlling the flow state of a water cooling circuit according to the working mode of a heat pump system in another embodiment;

[0025] Fig.10 A schematic flow chart of steps for controlling the flow state of a water cooling and heat dissipation circuit according to a working mode of a heat pump system in yet another embodiment;

[0026] Fig.11 is a detailed flow chart of a heat dissipation control method in an embodiment;

[0027] Fig.12 FIG. 4 is a detailed flowchart of a heat dissipation control method in another embodiment. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] The present application embodiment provides a heat pump system, such as Figure 1 As shown, it includes a refrigerant circulation loop, an electric controller and a heat dissipation structure. Among them, the refrigerant circulation loop is used to circulate the refrigerant in a loop composed of at least a compressor 1, a condenser 2 and a heat exchanger 3. The refrigerant circulation loop includes a compressor 1, a condenser 2 and a heat exchanger 3, and also includes a four-way valve 4 connected to the compressor 1, the condenser 2 and the heat exchanger 3, and an economizer 5 arranged between the compressor 1 and the condenser 2. The condenser 2 is connected to the economizer 5 through the main throttle valve, and the condenser 2 is also connected to the economizer 5 through the main throttle valve and the auxiliary throttle valve in turn. The above-mentioned devices can be connected via pipelines to form a refrigerant circulation loop, which is used to circulate the refrigerant to realize the cooling and heating functions of the heat pump system. The heat exchanger 3 can be a plate heat exchanger.

[0030] It can be understood that the heat pump system can switch between the cooling mode and the heating mode by reversing the four-way valve 4. In the heating mode, the low-temperature and low-pressure gaseous refrigerant is sucked into the compressor 1 from the air intake port and becomes a high-temperature and high-pressure gas after being pressurized. The high-temperature and high-pressure gas then enters the condenser 2 through the four-way valve 4, where the refrigerant releases heat through the condensation and liquefaction process, and this heat is transferred to the indoor air, thereby increasing the temperature of the indoor air. The liquid refrigerant after condensation and liquefaction is decompressed by a throttling element (such as a capillary tube) to reduce its pressure and temperature in preparation for the next evaporation process. At this point, the liquid refrigerant can also be supercooled again through the economizer 5 to make the refrigerant have a higher refrigeration efficiency. The decompressed liquid refrigerant enters the heat exchanger 3. In the heat exchanger 3, the refrigerant absorbs the heat of the outdoor air through the evaporation and gasification process, thereby becoming a low-temperature and low-pressure gaseous refrigerant, which is sucked into the compressor 1 again to start the next cycle. This process is repeated, and through the continuous liquefaction and gasification cycle, heat is transferred from the outdoor to the indoor to achieve the purpose of heating. After the water inlet of the heat exchanger 3 is connected to water, hot water can be output from the water outlet of the heat exchanger 3 through heat exchange with the heat exchanger 3 .

[0031] In the cooling mode, the low-temperature and low-pressure gaseous refrigerant is sucked into the compressor 1 from the air intake port and becomes a high-temperature and high-pressure gas after being pressurized. The high-temperature and high-pressure gas then enters the condenser 2 through the four-way valve 4. Through heat exchange in the condenser 2, the heat carried by the hot vapor is effectively released. The low-temperature and high-pressure liquid refrigerant after condensation and liquefaction can also be supercooled again through the economizer 5 so that the refrigerant has a higher refrigeration efficiency when entering the evaporator. Subsequently, the supercooled high-pressure liquid refrigerant is decompressed through a throttling element (such as a capillary tube) to reduce its pressure and temperature. The low-temperature and low-pressure liquid refrigerant enters the heat exchanger 3. In the heat exchanger 3, the liquid refrigerant is vaporized and absorbs a large amount of heat. Due to the heat absorption effect, the air temperature around the heat exchanger 3 decreases, thereby reducing the temperature of the indoor air. The vaporized refrigerant in the heat exchanger 3 becomes a low-temperature and low-pressure gaseous refrigerant again, and is sucked into the compressor 1 again to start the next cycle. This process is repeated. Through the cycle of continuous liquefaction and vaporization, heat is transferred from indoors to outdoors to achieve the purpose of cooling. After the water inlet of the heat exchanger 3 is connected to water, cold water can be output from the water outlet of the heat exchanger 3 through heat exchange with the heat exchanger 3 .

[0032] The electric controller is an important component of the heat pump system. It can communicate with other components to achieve data exchange, and can also control the operation of each component that has established a communication connection so that the heat pump system can work normally. For example, the electric controller is at least connected to the compressor 1 for communication, and is used to control the working state of the compressor 1, including whether the compressor 1 is working and the working power. However, after the electric controller has been working for a period of time, or after the electric controller is affected by other factors such as ambient temperature, its temperature will rise. Although some electric controllers are provided with a radiator, such as a heat sink, when the temperature of the electric controller is too high, the radiator cannot dissipate heat in time, and the cooling effect on the electric controller is poor. If the temperature of the electric controller is too high, it will affect the working performance of the electric controller, and even cause the electric controller to be damaged, resulting in low working reliability of the heat pump system.

[0033] The heat dissipation structure is used to dissipate heat from the radiator 20 of the electronic controller. The heat dissipation structure includes a water-cooled heat dissipation circuit 30, which is used to allow water to circulate in the water-cooled heat dissipation circuit 30. The water inlet of the water-cooled heat dissipation circuit 30 is connected to the water outlet of the heat exchanger 3, and the water output from the water outlet of the heat exchanger 3 can be connected. The water outlet of the water-cooled heat dissipation circuit 30 is connected to the water inlet of the heat exchanger 3, and the water output from the water outlet of the water-cooled heat dissipation circuit 30 can flow into the heat exchanger 3 through the water inlet of the heat exchanger 3 to realize water circulation.

[0034] The water cooling and heat dissipation circuit 30 is provided with a water pump 31. When the water pump 31 is working, water flows in the water cooling and heat dissipation circuit 30. The radiator 20 of the electric controller is provided in the water cooling and heat dissipation circuit 30 and is provided in contact with the water in the water cooling and heat dissipation circuit 30. Thus, the water in the water cooling and heat dissipation circuit 30 can dissipate the heat of the radiator 20 of the electric controller and reduce the temperature of the radiator 20 of the electric controller, thereby facilitating the radiator 20 of the electric controller to better reduce the temperature of the electric controller and improve the working reliability of the heat pump system.

[0035] In an exemplary embodiment, the heat pump system further includes a controller, which is in communication with the water pump 31 and is used to control the working state of the water pump 31 .

[0036] The working state of the water pump 31 is not unique, and may include whether the water pump 31 is working or not working, and may also include the speed of the water pump 31 when working. The communication connection may be a wired communication connection or a wireless communication connection, which is not limited here. The type of the water pump 31 is not limited, and may be a variable frequency water pump, for example.

[0037] The basis for the controller to control the working state of the water pump 31 is not unique. For example, the controller can receive user instructions and control the working state of the water pump 31 according to the user instructions so that the working state of the water pump 31 meets the user's needs. Alternatively, the controller can also control the working state of the water pump 31 based on preset control rules and combined with the received data to improve the degree of automation of the water pump 31.

[0038] In this embodiment, the heat pump system further includes a controller, which is in communication with the water pump 31, and the controller is used to control the working state of the water pump 31. By the controller, the working state of the water pump 31 can improve the automation of the water pump 31, thereby facilitating the intelligent operation of the heat pump system.

[0039] The structure of the water cooling circuit 30 is not unique. In an exemplary embodiment, Figure 2 As shown, the water-cooled heat dissipation circuit 30 includes a first branch 32 and a second branch 33. The water inlet of the first branch 32 is connected to the water outlet end of the heat exchanger 3. After the first branch 32 passes through the heat dissipation area of ​​the condenser 2, the water outlet of the first branch 32 is connected to the pipeline where the radiator 20 of the electronic controller is located; the water inlet of the second branch 33 is connected to the water outlet end of the heat exchanger 3, and the water outlet of the second branch 33 is connected to the pipeline where the radiator 20 of the electronic controller is located.

[0040] The first branch 32 and the second branch 33 are two different branches. The pipeline where the radiator 20 of the electronic controller is located refers to the part of the pipeline of the water-cooling heat dissipation circuit 30 corresponding to the position of the radiator 20 of the electronic controller in the water-cooling heat dissipation circuit 30. The heat dissipation area of ​​the condenser 2 refers to the action area of ​​the radiator of the condenser 2. For example, when the radiator of the condenser 2 is a fan, the action area of ​​the radiator of the condenser 2 refers to the air supply area of ​​the fan.

[0041] When the water-cooled heat dissipation circuit 30 includes the first branch 32 and the second branch 33, the water in the water-cooled heat dissipation circuit 30 has two different flow paths. The first flow path is the water outlet of the heat exchanger 3 - the first branch 32 (passing through the heat dissipation area of ​​the condenser 2) - the pipeline where the radiator 20 of the electric controller is located - the water inlet of the heat exchanger 3. The second flow path is the water outlet of the heat exchanger 3 - the second branch 33 (not passing through the heat dissipation area of ​​the condenser 2) - the pipeline where the radiator 20 of the electric controller is located - the water inlet of the heat exchanger 3. It can be expanded, such as Figure 3 As shown, the first branch 32 is arranged in a spiral manner in the heat dissipation area of ​​the condenser 2, thereby increasing the area of ​​the first branch 32 in the heat dissipation area of ​​the condenser 2, so that the first branch 32 has a good cooling effect in the heat dissipation area of ​​the condenser 2.

[0042] In the first flow path, when the water output from the water outlet of the heat exchanger 3 flows in the water cooling circuit 30, the water temperature decreases after passing through the heat dissipation area of ​​the condenser 2, and then flows through the radiator 20 of the electric controller, dissipates heat and cools the radiator 20 of the electric controller, and then flows back to the water inlet of the heat exchanger 3. In this case, when the water output from the water outlet of the heat exchanger 3 is hot water, it can be cooled in the heat dissipation area of ​​the condenser 2, and then cooled in the radiator 20 of the electric controller, which can improve the heat dissipation and cooling effect of the radiator 20 of the electric controller. In the second flow path, the water output from the water outlet of the heat exchanger 3 can directly pass through the radiator 20 of the electric controller through the second branch 33, and after cooling the radiator 20 of the electric controller, it flows back to the water inlet of the heat exchanger 3. In this case, when the water output from the water outlet of the heat exchanger 3 is cold water, it can be directly used to cool the radiator 20 of the electric controller, which is convenient to use.

[0043] In this embodiment, the water cooling heat dissipation circuit 30 includes a first branch 32 and a second branch 33. The water inlet of the first branch 32 is connected to the water outlet of the heat exchanger 3. After the first branch 32 passes through the heat dissipation area of ​​the condenser 2, the water outlet of the first branch 32 is connected to the pipeline where the radiator 20 of the electric controller is located; the water inlet of the second branch 33 is connected to the water outlet of the heat exchanger 3, and the water outlet of the second branch 33 is connected to the pipeline where the radiator 20 of the electric controller is located. Through the first branch 32 and the second branch 33, the flow path of water in the water heat dissipation circuit is enriched, so that the radiator 20 of the electric controller can be effectively cooled and cooled at different water outlet temperatures of the heat pump system, thereby expanding the application range of the heat pump system.

[0044] In an exemplary embodiment, Figure 2 As shown, the second branch 33 is provided with a solenoid valve 34 that is in communication with the controller, and the solenoid valve 34 can be set at any position of the second branch 33 to control the on and off of the second branch 33. Exemplarily, the solenoid valve 34 can be set at the middle section of the second branch 33. The controller is used to control the on and off state of the solenoid valve 34 according to the working mode of the heat pump system.

[0045] The working mode of the heat pump system includes a heating mode and a cooling mode. If the working mode of the heat pump system is the heating mode, the water output from the water outlet of the heat exchanger 3 is hot water. If the working mode of the heat pump system is the cooling mode, the water output from the water outlet of the heat exchanger 3 is cold water. The controller can control the on-off state of the second branch 33 by controlling the on-off state of the solenoid valve 34. When the solenoid valve 34 is open, the second branch 33 is connected. When the solenoid valve 34 is closed, the second branch 33 is disconnected.

[0046] The specific manner in which the controller controls the switch state of the electromagnetic valve 34 according to the working mode of the heat pump system may include: if the working mode of the heat pump system is the cooling mode, the electromagnetic valve 34 is controlled to be opened, and the second branch 33 is turned on, and the cold water output from the water outlet of the heat exchanger 3 directly passes through the second branch 33 to reach the radiator 20 of the electronic controller, and cools the radiator 20 of the electronic controller without passing through the heat dissipation area of ​​the condenser 2, which can reduce the heat dissipation load of the radiator of the condenser 2, and has a good cooling effect. At this time, since the first branch 32 passes through the heat dissipation area of ​​the condenser 2, the first branch 32 has a longer path than the second branch 33, and has a large flow resistance, so only a small amount of water or no water will flow in the first branch 32.

[0047] If the working mode of the heat pump system is the heating mode, the control solenoid valve 34 is closed, and the second branch 33 is disconnected. The hot water output from the water outlet of the heat exchanger 3 first reaches the first branch 32, and after being cooled in the heat dissipation area of ​​the condenser 2 in the first branch 32, the cooled water reaches the radiator 20 of the electronic controller to cool the radiator 20 of the electronic controller to ensure the cooling effect of the radiator 20 of the electronic controller.

[0048] In other embodiments, a solenoid valve that is communicatively connected to the controller may also be provided on the first branch 32, and the controller is used to control the switch state of the solenoid valve on the first branch 32 according to the working mode of the heat pump system. The controller can control the on-off state of the first branch 32 by controlling the switch state of the solenoid valve on the first branch 32. When the solenoid valve 34 is opened, the first branch 32 is connected. When the solenoid valve 34 is closed, the first branch 32 is disconnected. The specific manner in which the controller controls the switch state of the solenoid valve 34 according to the working mode of the heat pump system may be: if the working mode of the heat pump system is the cooling mode, the solenoid valve 34 is controlled to be opened, and the solenoid valve on the first branch 32 is controlled to be closed, then the second branch 33 is connected, and the first branch 32 is disconnected. If the working mode of the heat pump system is the heating mode, the solenoid valve 34 is controlled to be closed, and the solenoid valve on the first branch 32 is controlled to be opened, then the second branch 33 is disconnected, and the first branch 32 is connected. The controller can control the on-off state of the first branch 32 by controlling the on-off state of the solenoid valve on the first branch 32 , thereby more accurately controlling the flow path of water in the water-cooling heat dissipation circuit 30 .

[0049] In this embodiment, a solenoid valve 34 is provided on the second branch 33 and is communicatively connected to the controller. The controller controls the switching state of the solenoid valve 34 according to the working mode of the heat pump system to control the conduction state of the second branch 33, thereby controlling the flow state of the water-cooled heat dissipation circuit 30, which is beneficial to effectively dissipate heat and cool the radiator 20 of the electronic controller in different scenarios, thereby improving the working reliability of the electronic controller.

[0050] In an exemplary embodiment, Figure 2 As shown, the heat pump system further includes a first temperature detection device 40 that is communicatively connected to the controller, and the first temperature detection device 40 is disposed at the radiator 20 of the electric controller. The first temperature detection device 40 is used to detect the temperature of the radiator 20 of the electric controller and send it to the controller, and the controller adjusts the speed of the water pump 31 according to the temperature of the radiator 20 of the electric controller.

[0051] The radiator 20 of the electric controller may be a heat sink of the electric controller. The first temperature detection device 40 may be disposed on the radiator 20 of the electric controller, or may be disposed near the radiator 20 of the electric controller. The distance between the first temperature detection device 40 and the radiator 20 of the electric controller is less than a preset distance threshold, so as to detect the temperature of the radiator 20 of the electric controller.

[0052] The first temperature detection device 40 detects the temperature of the radiator 20 of the electric controller and sends it to the controller, and the controller adjusts the speed of the water pump 31 according to the temperature of the radiator 20 of the electric controller. The controller may adjust the speed of the water pump 31 according to the temperature of the radiator 20 of the electric controller in the following manner: if the temperature of the radiator 20 of the electric controller is greater than a preset temperature threshold, indicating that the temperature of the radiator 20 of the electric controller is high at this time, the controller controls to increase the speed of the water pump 31 to increase the flow rate of water in the water cooling circuit 30, improve the heat dissipation efficiency of the radiator 20 of the electric controller, and reduce the temperature of the radiator 20 of the electric controller more quickly. The value of the preset temperature threshold is not unique, for example, it may be 75°C.

[0053] In an expandable manner, if the temperature of the radiator 20 of the electronic controller is less than or equal to the preset temperature threshold, the controller can keep the speed of the water pump 31 unchanged, or reduce the speed of the water pump 31, etc., and can also determine the adjustment method of the water pump 31 in combination with other parameters. It can be determined based on actual conditions and is not limited here.

[0054] In this embodiment, the heat pump system further includes a first temperature detection device 40 that is communicatively connected to the controller, and the first temperature detection device 40 is disposed at the radiator 20 of the electric controller. The first temperature detection device 40 is used to detect the temperature of the radiator 20 of the electric controller and send it to the controller, and the controller adjusts the speed of the water pump 31 according to the temperature of the radiator 20 of the electric controller. Thus, the controller can appropriately adjust the speed of the water pump 31 according to the temperature state of the radiator 20 of the electric controller, effectively cool down the radiator 20 of the electric controller, and improve the cooling effect.

[0055] In an exemplary embodiment, Figure 2As shown, the heat pump system further includes a second temperature detection device 50 and a third temperature detection device 60 which are communicatively connected to the controller. The second temperature detection device 50 is arranged in the water cooling heat dissipation circuit 30, at the water inlet of the radiator 20 of the electric controller, and the third temperature detection device 60 is arranged in the water cooling heat dissipation circuit 30, at the water outlet of the radiator 20 of the electric controller. The second temperature detection device 50 is used to detect the inlet water temperature and send it to the controller; the third temperature detection device 60 is used to detect the outlet water temperature and send it to the controller, and the controller is used to adjust the speed of the water pump 31 according to the inlet water temperature and the outlet water temperature.

[0056] The second temperature detection device 50 is disposed in the water cooling and heat dissipation circuit 30, at the water inlet of the radiator 20 of the electronic controller, to detect the water inlet temperature, which is the temperature of the water in the water cooling and heat dissipation circuit 30 that is about to but has not yet dissipated the heat of the radiator 20 of the electronic controller. The third temperature detection device 60 is disposed in the water cooling and heat dissipation circuit 30, at the water outlet of the radiator 20 of the electronic controller, to detect the water outlet temperature, which is the temperature of the water in the water cooling and heat dissipation circuit 30 that has just dissipated the heat of the radiator 20 of the electronic controller.

[0057] Optionally, the second temperature detection device 50 can be arranged in the pipeline of the water-cooled heat dissipation loop 30 to more accurately detect the inlet water temperature. Alternatively, the second temperature detection device 50 can also be arranged outside the pipeline of the water-cooled heat dissipation loop 30, and attached to the pipeline to prevent water from affecting the working performance of the second temperature detection device 50. The third temperature detection device 60 can be arranged in the pipeline of the water-cooled heat dissipation loop 30 to more accurately detect the outlet water temperature. Alternatively, the third temperature detection device 60 can also be arranged outside the pipeline of the water-cooled heat dissipation loop 30, and attached to the pipeline to prevent water from affecting the working performance of the third temperature detection device 60.

[0058] The controller adjusts the speed of the water pump 31 according to the inlet water temperature and the outlet water temperature, and can adjust the speed of the water pump 31 according to the temperature difference between the outlet water temperature and the inlet water temperature. The temperature difference between the outlet water temperature and the inlet water temperature can represent the temperature state of the radiator 20 of the electronic controller. Generally, when the temperature difference between the outlet water temperature and the inlet water temperature is large, the temperature of the radiator 20 of the electronic controller is higher, and when the temperature difference between the outlet water temperature and the inlet water temperature is smaller, the temperature of the radiator 20 of the electronic controller is lower.

[0059] Furthermore, the controller may adjust the rotation speed of the water pump 31 according to a target adjustment method corresponding to the interval of the temperature difference between the outlet water temperature and the inlet water temperature. The target adjustment method includes increasing, decreasing or maintaining the rotation speed of the water pump 31 .

[0060] Among them, different intervals correspond to different target adjustment methods. For example, if the interval where the temperature difference between the outlet water temperature and the inlet water temperature is less than 5°C, it means that the temperature of the radiator 20 of the electronic controller is low at this time, and the radiator 20 of the electronic controller does not have a large heat dissipation demand, then the corresponding target adjustment method is to reduce the speed of the water pump 31, and the controller reduces the water consumption of the water cooling circuit 30 by reducing the speed of the water pump 31. If the interval where the temperature difference between the outlet water temperature and the inlet water temperature is greater than or equal to 5°C and less than or equal to 8°C, it means that the temperature of the radiator 20 of the electronic controller is moderate at this time, and the radiator 20 of the electronic controller does not have a greater heat dissipation demand, then the corresponding target adjustment method is to maintain the speed of the water pump 31 and maintain the current heat dissipation effect. If the interval where the temperature difference between the outlet water temperature and the inlet water temperature is greater than 8°C, it means that the temperature of the radiator 20 of the electronic controller is high at this time, and the radiator 20 of the electronic controller has a greater heat dissipation demand, then the corresponding target adjustment method is to increase the speed of the water pump 31, and the controller increases the speed of the water pump 31 to improve the heat dissipation effect of the radiator 20 of the electronic controller.

[0061] In this embodiment, the heat pump system further includes a second temperature detection device 50 and a third temperature detection device 60 which are communicatively connected to the controller. The second temperature detection device 50 is arranged in the water cooling heat dissipation circuit 30 at the water inlet of the radiator 20 of the electric controller, and the third temperature detection device 60 is arranged in the water cooling heat dissipation circuit 30 at the water outlet of the radiator 20 of the electric controller. The second temperature detection device 50 is used to detect the inlet water temperature and send it to the controller; the third temperature detection device 60 is used to detect the outlet water temperature and send it to the controller, and the controller is used to adjust the speed of the water pump 31 according to the inlet water temperature and the outlet water temperature. Thus, the controller can adjust the speed of the water pump 31 in accordance with the actual situation according to the inlet water temperature and the outlet water temperature, effectively cool down the radiator 20 of the electric controller, and improve the cooling effect.

[0062] In an expandable embodiment, the controller is also used to obtain the dew point temperature, and adjust the rotation speed of the water pump 31 according to the dew point temperature and the inlet water temperature.

[0063] Among them, the dew point temperature refers to the temperature at which the air is cooled to saturation while keeping the water vapor content in the air unchanged and the air pressure constant, that is, the temperature at which water vapor and water reach equilibrium.

[0064] If the temperature of the water used to dissipate heat from the radiator 20 of the electric controller in the water cooling circuit 30 is low, or the ambient temperature of the environment where the radiator 20 of the electric controller is located is also low, or the temperature of the radiator 20 of the electric controller itself is low, the radiator 20 of the electric controller is at risk of condensation, and the electric controller is also at risk of condensation. If condensation occurs in the electric controller, it will have a significant adverse effect on the working performance and service life of the electric controller.

[0065] In order to reduce the risk of condensation in the radiator 20 of the electronic controller, the controller is also used to obtain the dew point temperature and adjust the speed of the water pump 31 according to the dew point temperature and the inlet water temperature. The controller can directly receive the dew point temperature sent from other devices, or calculate the dew point temperature through the received parameters, which is not limited here.

[0066] The controller adjusts the speed of the water pump 31 according to the dew point temperature and the inlet water temperature, and can adjust the speed of the water pump 31 according to the temperature difference between the inlet water temperature and the dew point temperature. The temperature difference between the inlet water temperature and the dew point temperature can represent the degree of condensation of the radiator 20 of the electronic controller. Generally, when the temperature difference between the inlet water temperature and the dew point temperature is small, it represents that the radiator 20 of the electronic controller is more likely to condense, and when the temperature difference between the inlet water temperature and the dew point temperature is large, it represents that the radiator 20 of the electronic controller is less likely to condense.

[0067] Furthermore, the controller may adjust the rotation speed of the water pump 31 according to a target adjustment method corresponding to the interval in which the temperature difference between the inlet water temperature and the dew point temperature lies. The target adjustment method includes increasing, decreasing or maintaining the rotation speed of the water pump 31 .

[0068] Different intervals correspond to different target adjustment methods. For example, if the interval between the inlet water temperature and the dew point temperature is less than -2°C, it means that the inlet water temperature is less than the dew point temperature, and the absolute value of the difference with the dew point temperature is large. At this time, the radiator 20 of the electronic controller is prone to condensation. The corresponding target adjustment method is to reduce the speed of the water pump 31. The controller reduces the inlet water volume of the low-temperature water for heat dissipation of the radiator 20 of the electronic controller by reducing the speed of the water pump 31, so as to delay or avoid condensation of the radiator 20 of the electronic controller.

[0069] If the temperature difference between the inlet water temperature and the dew point temperature is in the range of greater than or equal to -2°C and less than or equal to 2°C, it means that the inlet water temperature is close to the dew point temperature and the possibility of condensation on the radiator 20 of the electronic controller is relatively small. The corresponding target adjustment method is to maintain the speed of the water pump 31 and maintain the current water inlet amount for dissipating heat to the radiator 20 of the electronic controller.

[0070] If the temperature difference between the inlet water temperature and the dew point temperature is greater than 2°C, it means that the inlet water temperature is greater than the dew point temperature, and the difference between the inlet water temperature and the dew point temperature is relatively large. At this time, the radiator 20 of the electronic controller is not easy to condense. The corresponding target adjustment method is to increase the speed of the water pump 31. The controller increases the speed of the water pump 31 to improve the heat dissipation effect of the radiator 20 of the electronic controller.

[0071] In this embodiment, the controller is also used to obtain the dew point temperature, and adjust the speed of the water pump 31 according to the dew point temperature and the inlet water temperature. The condensation risk of the radiator 20 of the electronic controller can be determined based on the dew point temperature and the inlet water temperature, and the speed of the water pump 31 can be adjusted to reduce the condensation risk of the radiator 20 of the electronic controller.

[0072] In an exemplary embodiment, the heat pump system also includes a fourth temperature detection device and a humidity detection device which are communicatively connected to the controller; the fourth temperature detection device is used to detect the ambient temperature and send it to the controller, and the humidity detection device is used to detect the ambient humidity and send it to the controller, and the controller is used to determine the dew point temperature based on the ambient temperature and ambient humidity.

[0073] The locations of the fourth temperature detection device and the humidity detection device are not limited, as long as they can detect the ambient temperature and the ambient humidity respectively. For example, the fourth temperature detection device and the humidity detection device can be arranged on the electric controller, or arranged near the electric controller, to detect the ambient temperature and the ambient humidity of the environment in which the electric controller is located.

[0074] There is no unique way to determine the dew point temperature based on the ambient temperature and ambient humidity. For example, the dew point temperature can be determined based on a psychrometric diagram. Specifically, on the psychrometric diagram, the position of the point is first determined based on the ambient temperature and ambient humidity, and then a vertical line is drawn from the point. The temperature corresponding to the intersection with the line with a relative humidity of 100% is the dew point temperature at the temperature and humidity. It can be understood that in other embodiments, the dew point temperature can also be determined by formula calculation or other methods, which are not limited here.

[0075] In this embodiment, the heat pump system also includes a fourth temperature detection device and a humidity detection device which are communicatively connected to the controller; the fourth temperature detection device is used to detect the ambient temperature and send it to the controller, and the humidity detection device is used to detect the ambient humidity and send it to the controller. The controller is used to determine the dew point temperature according to the ambient temperature and the ambient humidity, and can obtain the accurate dew point temperature in the actual environment.

[0076] The present application also provides a heat dissipation control method, which is implemented based on the heat pump system of any of the above embodiments. The heat dissipation control method can be executed by a controller in the heat pump system, or by a terminal or server connected to the heat pump system. For example, the heat dissipation control method is executed by a controller in the heat pump system. Figure 4 As shown, the heat dissipation control method includes step 302 and step 304. Among them:

[0077] Step 302, receiving a water cooling start signal.

[0078] The water cooling start signal indicates that the radiator of the electric controller needs to be water cooled. The water cooling start signal can be sent by the user and received by the controller to achieve the cooling of the radiator of the electric controller according to the user's needs. Alternatively, the controller can also use the start signal of the heat pump system as the water cooling start signal to achieve the simultaneous start of the cooling / heating of the heat pump system and the water cooling of the electric controller.

[0079] Step 304, in response to the water cooling start signal, the water cooling heat dissipation circuit is controlled to operate, so that the water cooling heat dissipation circuit is connected to the water output of the heat exchanger, and after the radiator of the electronic controller is water-cooled and heat is dissipated, the water is output to the water inlet end of the heat exchanger.

[0080] After receiving the water cooling start signal, the controller controls the water cooling circuit to work. For example, it can control the water pump in the water cooling circuit to connect the water output by the heat exchanger to the water cooling circuit, and then output the water to the water inlet end of the heat exchanger after the radiator of the electronic controller is water-cooled.

[0081] In this embodiment, the outlet water of the heat exchanger is used to perform water cooling on the radiator of the electronic controller, which has high heat dissipation efficiency and is environmentally friendly. The temperature of the radiator of the electronic controller can be effectively reduced, and the water after the heat is dissipated by the radiator of the electronic controller is output to the water inlet end of the heat exchanger, so that the waste heat of the radiator of the electronic controller can be recovered, thereby improving the heat exchange efficiency, better reducing the temperature of the electronic controller, and effectively improving the working reliability of the heat pump system.

[0082] In an exemplary embodiment, Figure 5 As shown, in step 304 , the step of controlling the operation of the water cooling circuit includes step 402 and step 404 .

[0083] Step 402, obtaining the working mode of the heat pump system.

[0084] The working modes of the heat pump system include heating mode and cooling mode. If the working mode of the heat pump system is heating mode, the water output from the water outlet of the heat exchanger is hot water. If the working mode of the heat pump system is cooling mode, the water output from the water outlet of the heat exchanger is cold water.

[0085] Step 404, controlling the flow state of the water cooling circuit according to the working mode of the heat pump system.

[0086] The flow state of the water-cooling heat dissipation circuit may include the flow path of water in the water-cooling heat dissipation circuit, or may include the flow rate and flow rate of water in the water-cooling heat dissipation circuit.

[0087] When the working mode of the heat pump system is different, the water temperature of the water inlet of the water cooling circuit connected from the water outlet of the heat exchanger is different, so the heat dissipation effect on the radiator of the electronic controller is also different. By controlling the flow state of the water cooling circuit, the water in the water cooling circuit can better dissipate the heat of the radiator of the electronic controller, improve the cooling effect of the radiator of the electronic controller, and thus help improve the working performance of the electronic controller.

[0088] In this embodiment, the working mode of the heat pump system is obtained, and the flow state of the water cooling heat dissipation circuit is controlled according to the working mode of the heat pump system, so that the water cooling heat dissipation circuit is in a suitable flow state under different working modes to better cool the radiator of the electronic controller.

[0089] In an exemplary embodiment, the water cooling circuit includes a first branch and a second branch, and a solenoid valve is disposed on the second branch. Figure 6 As shown, step 404 includes step 504: controlling the switch state of the solenoid valve according to the working mode of the heat pump system.

[0090] By controlling the on / off state of the solenoid valve, the on / off state of the second branch can be controlled, thereby controlling the flow path of water in the water cooling circuit. When the solenoid valve is open, the second branch is connected. When the solenoid valve is closed, the second branch is disconnected.

[0091] In this embodiment, a solenoid valve communicatively connected to the controller is provided on the second branch. The controller controls the switching state of the solenoid valve according to the working mode of the heat pump system to control the conduction state of the second branch, thereby controlling the flow state of the water-cooling heat dissipation circuit, which is beneficial to effectively dissipate heat and cool the radiator of the electronic controller in different scenarios, thereby improving the working reliability of the electronic controller.

[0092] Furthermore, in an exemplary embodiment, Figure 7 As shown, step 504 includes step 602 and step 604 .

[0093] Step 602: If the working mode of the heat pump system is the cooling mode, control the solenoid valve to open.

[0094] If the working mode of the heat pump system is the cooling mode, the control solenoid valve is opened, and the second branch is connected, and the cold water output from the water outlet of the heat exchanger directly passes through the second branch to the radiator of the electronic controller, and cools the radiator of the electronic controller without passing through the heat dissipation area of ​​the condenser, which can reduce the heat dissipation load of the radiator of the condenser and has a good cooling effect. At this time, since the first branch passes through the heat dissipation area of ​​the condenser, the first branch has a longer path than the second branch and has a large flow resistance, so only a small amount of water or no water will flow in the first branch.

[0095] In other embodiments, if the working mode of the heat pump system is cooling mode when it is turned on, the solenoid valve can be controlled to close for a certain period of time before being controlled to open. Because the temperature of the radiator of the electronic controller will not be too high when it is just turned on, the water connected to the water cooling circuit first passes through the condenser and flows through the longer first branch. The water can stay in the water cooling circuit for a longer period of time before being transmitted to the radiator of the electronic controller, which can effectively prevent condensation of the radiator of the electronic controller.

[0096] Step 604: If the operating mode of the heat pump system is the heating mode, the solenoid valve is controlled to be closed.

[0097] If the working mode of the heat pump system is heating mode and the control solenoid valve is closed, the second branch is disconnected, and the hot water output from the water outlet of the heat exchanger first reaches the first branch. After being cooled in the heat dissipation area of ​​the condenser in the first branch, the cooled water reaches the radiator of the electronic controller to cool the radiator of the electronic controller to ensure the cooling effect of the radiator of the electronic controller.

[0098] In an extensible manner, if the working mode of the heat pump system is the heating mode, after the control solenoid valve is closed, the state of the solenoid valve can also be adjusted in combination with other parameters. For example, when the heating is turned on, after the control solenoid valve is closed: if the ambient temperature is greater than 0°C, the solenoid valve can be controlled to open, effectively reducing the possibility of condensation in the radiator of the electronic controller. After the solenoid valve is opened, the controller obtains the temperature of the radiator of the electronic controller. If the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, the controller controls the closing of the solenoid valve, so that the water in the water-cooling heat dissipation circuit passes through the heat dissipation area of ​​the condenser and cools the radiator of the electronic controller. After the heating is turned on, after the control solenoid valve is closed, if the ambient temperature is less than or equal to 0°C, it means that the ambient temperature is low, then the controller obtains the temperature of the radiator of the electronic controller. If the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, the controller controls the opening of the solenoid valve, and the ambient temperature can also cool the water in the water-cooling heat dissipation circuit.

[0099] In this embodiment, if the working mode of the heat pump system is the cooling mode, the control solenoid valve is opened, and the cold water output from the water outlet of the heat exchanger directly reaches the radiator of the electronic controller through the second branch to cool the radiator of the electronic controller without passing through the heat dissipation area of ​​the condenser, which can reduce the heat dissipation load of the radiator of the condenser and has a good cooling effect. If the working mode of the heat pump system is the heating mode, the control solenoid valve is closed, and the hot water output from the water outlet of the heat exchanger first reaches the first branch, passes through the heat dissipation area of ​​the condenser in the first branch to cool down, and then the cooled water reaches the radiator of the electronic controller to cool down the radiator of the electronic controller to ensure the cooling effect of the radiator of the electronic controller.

[0100] The controller can also control the flow state of the water cooling circuit by controlling the water pump. Figure 8 As shown, step 404 includes step 704 and step 706. Among them,

[0101] Step 704, obtaining the current temperature corresponding to the working mode of the heat pump system.

[0102] The current temperature includes the temperature of the radiator of the electronic controller, the water inlet temperature at the water inlet of the radiator of the electronic controller, and also includes one of the dew point temperature and the water outlet temperature at the water outlet of the radiator of the electronic controller.

[0103] The temperature of the radiator of the electronic controller directly represents the temperature state of the radiator of the electronic controller. The water inlet temperature at the water inlet of the radiator of the electronic controller is the temperature of the water in the water cooling circuit that is about to dissipate heat to the radiator of the electronic controller but has not yet dissipated heat to the radiator of the electronic controller. The water outlet temperature at the water outlet of the radiator of the electronic controller is the temperature of the water in the water cooling circuit that has just dissipated heat to the radiator of the electronic controller. The dew point temperature is the temperature at which water vapor and water reach a state of equilibrium, which represents the difficulty of condensation in the radiator of the electronic controller.

[0104] Step 706: adjust the speed of the water pump in an optional adjustment manner according to the current temperature.

[0105] In different working modes, the current temperature of the radiator that affects the electronic controller includes different types of temperatures. Therefore, the controller first obtains the current temperature corresponding to the working mode of the heat pump system, and then adjusts the speed of the water pump in an optional adjustment method according to the current temperature, so as to adjust the speed of the water pump according to the current temperature with greater influence, so that the speed of the water pump after adjustment can better meet the actual needs. Among them, the optional adjustment method includes increasing, decreasing or maintaining the speed of the water pump.

[0106] In this embodiment, the current temperature corresponding to the working mode of the heat pump system is obtained, and the speed of the water pump is adjusted in an optional adjustment manner according to the current temperature. The speed of the water pump is adjusted according to the current temperature which has a greater impact, so that the adjusted speed of the water pump can better meet actual needs, thereby allowing the flow state of the water cooling heat dissipation circuit to better improve the working performance of the radiator of the electronic controller.

[0107] In an exemplary embodiment, if the working mode of the heat pump system is the cooling mode, the current temperature includes the temperature of the radiator of the electronic controller, the water inlet temperature at the water inlet of the radiator of the electronic controller, and the dew point temperature. Fig. 9 As shown, step 706 includes step 806 and step 808. Among them,

[0108] Step 806: if the temperature of the radiator of the electronic controller is greater than a preset temperature threshold, increase the rotation speed of the water pump.

[0109] If the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, indicating that the temperature of the radiator of the electronic controller is high at this time, the controller controls to increase the speed of the water pump to increase the flow rate of water in the water cooling circuit, improve the heat dissipation efficiency of the radiator of the electronic controller, and reduce the temperature of the radiator of the electronic controller more quickly. The value of the preset temperature threshold is not unique, for example, it can be 75°C.

[0110] Step 808: If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the speed of the water pump is adjusted according to the target adjustment method corresponding to the interval of the temperature difference between the inlet water temperature and the dew point temperature.

[0111] If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the controller can adjust the speed of the water pump according to the target adjustment method corresponding to the interval of the temperature difference between the inlet water temperature and the dew point temperature. The target adjustment method includes increasing, decreasing or maintaining the speed of the water pump.

[0112] In cooling mode, the water temperature of the water cooling circuit connected to the water outlet of the heat exchanger is low, and there is a risk of condensation on the radiator of the electronic controller. In this case, the controller adjusts the speed of the water pump according to the target adjustment method corresponding to the range of the temperature difference between the inlet water temperature and the dew point temperature to reduce the condensation of the radiator of the electronic controller.

[0113] Different intervals correspond to different target adjustment methods. For example, if the interval between the inlet water temperature and the dew point temperature is less than -2°C, it means that the inlet water temperature is less than the dew point temperature, and the absolute value of the difference with the dew point temperature is large. At this time, the radiator of the electronic controller is prone to condensation. The corresponding target adjustment method is to reduce the speed of the water pump. The controller reduces the inlet water volume of the low-temperature water for cooling the radiator of the electronic controller by reducing the speed of the water pump, so as to delay or avoid condensation of the radiator of the electronic controller.

[0114] If the temperature difference between the inlet water temperature and the dew point temperature is greater than or equal to -2°C and less than or equal to 2°C, it means that the inlet water temperature is close to the dew point temperature and the possibility of condensation on the radiator of the electronic controller is relatively small. The corresponding target adjustment method is to maintain the water pump speed and maintain the current water inlet volume for cooling the radiator of the electronic controller.

[0115] If the temperature difference between the inlet water temperature and the dew point temperature is greater than 2°C, it means that the inlet water temperature is greater than the dew point temperature, and the difference between the inlet water temperature and the dew point temperature is large. At this time, the radiator of the electronic controller is not easy to condense. The corresponding target adjustment method is to increase the water pump speed. The controller increases the water pump speed to improve the heat dissipation effect of the radiator of the electronic controller.

[0116] In this embodiment, when the working mode of the heat pump system is the cooling mode, if the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, the speed of the water pump is increased to effectively cool the radiator of the electronic controller. If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the speed of the water pump is adjusted according to the target adjustment method corresponding to the interval of the temperature difference between the inlet water temperature and the dew point temperature, which can reduce the condensation risk of the radiator of the electronic controller.

[0117] In an exemplary embodiment, if the working mode of the heat pump system is the heating mode, the current temperature includes the temperature of the radiator of the electronic controller, the water inlet temperature at the water inlet of the radiator of the electronic controller, and the water outlet temperature at the water outlet of the radiator of the electronic controller. Fig.10 As shown, step 706 includes step 906 and step 908. Among them,

[0118] Step 906: if the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, increase the rotation speed of the water pump.

[0119] If the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, indicating that the temperature of the radiator of the electronic controller is high at this time, the controller controls to increase the speed of the water pump to increase the flow rate of water in the water cooling circuit, improve the heat dissipation efficiency of the radiator of the electronic controller, and reduce the temperature of the radiator of the electronic controller more quickly. The value of the preset temperature threshold is not unique, for example, it can be 75°C.

[0120] Step 908: If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the speed of the water pump is adjusted according to the target adjustment method corresponding to the interval of the temperature difference between the outlet water temperature and the inlet water temperature.

[0121] The target adjustment method includes increasing, decreasing or maintaining the rotation speed of the water pump. If the working mode of the heat pump system is the heating mode, the temperature difference between the outlet water temperature and the inlet water temperature can represent the temperature state of the radiator of the electronic controller.

[0122] Different intervals correspond to different target adjustment methods. For example, if the interval where the temperature difference between the outlet water temperature and the inlet water temperature is less than 5°C, it means that the temperature of the radiator of the electronic controller is low at this time, and the radiator of the electronic controller does not have a large heat dissipation demand, then the corresponding target adjustment method is to reduce the water pump speed, and the controller reduces the water consumption of the water cooling circuit by reducing the water pump speed. If the interval where the temperature difference between the outlet water temperature and the inlet water temperature is greater than or equal to 5°C and less than or equal to 8°C, it means that the temperature of the radiator of the electronic controller is moderate at this time, and the radiator of the electronic controller does not have a greater heat dissipation demand, then the corresponding target adjustment method is to maintain the water pump speed and maintain the current heat dissipation effect. If the interval where the temperature difference between the outlet water temperature and the inlet water temperature is greater than 8°C, it means that the temperature of the radiator of the electronic controller is high at this time, and the radiator of the electronic controller has a greater heat dissipation demand, then the corresponding target adjustment method is to increase the water pump speed, and the controller increases the water pump speed to improve the heat dissipation effect of the radiator of the electronic controller.

[0123] In this embodiment, when the working mode of the heat pump system is the heating mode, if the temperature of the radiator of the electronic controller is greater than the preset temperature threshold, the speed of the water pump is increased to effectively cool the radiator of the electronic controller. If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the speed of the water pump is adjusted according to the target adjustment method corresponding to the interval where the temperature difference between the outlet water temperature and the inlet water temperature is located. Thus, the controller can adjust the speed of the water pump in accordance with the actual situation according to the inlet water temperature and the outlet water temperature, effectively cool the radiator of the electronic controller, and improve the cooling effect.

[0124] In order to better understand the above embodiment, a detailed explanation is given below in conjunction with a specific embodiment. Figure 2 As shown, the heat pump system includes a refrigerant circulation loop, an electric controller, a heat dissipation structure, a controller, a first temperature detection device, a second temperature detection device, a third temperature detection device, a fourth temperature detection device and a humidity detection device. Among them, the refrigerant circulation loop includes a compressor 1, a condenser 2, a heat exchanger 3, a four-way valve 4 and an economizer 5, and the heat dissipation structure includes a water-cooled heat dissipation loop 30, and a water pump 31 is provided on the water-cooled heat dissipation loop 30, and the water pump 31 is a variable frequency water pump. The water-cooled heat dissipation loop 30 includes a first branch 32 and a second branch 33, the first branch 32 passes through the heat dissipation area of ​​the condenser 2, and the second branch does not pass through the heat dissipation area of ​​the condenser, and a solenoid valve 34 is provided on the second branch 33.

[0125] The heat dissipation control method comprises the following steps:

[0126] like Fig.11 As shown in the figure, when the heat pump system is turned on, the controller controls the solenoid valve to close, the variable frequency water pump to start, and the compressor to run for 2 minutes to obtain the temperature T of the radiator of the electronic controller.散 :

[0127] If the heat sink temperature T 散 If the temperature is greater than the preset temperature threshold Y°C, the water pump speed is increased. The preset temperature threshold is used as a standard for judging whether the temperature is too high, and its value is not unique. For example, the preset temperature threshold Y=75°C.

[0128] If the heat sink temperature T 散 The dew point temperature Tout is calculated based on the ambient temperature and humidity. C Next, the controller obtains the inlet water temperature T 进水 , judge T 进水 With T C The difference: If T 进水 -T C <-2℃, the controller reduces the speed of the variable frequency water pump; if -2℃≤T 进水 -T C ≤2℃, the controller maintains the speed of the variable frequency water pump; if T 进水 -T C >2℃, the controller increases the speed of the variable frequency water pump.

[0129] like Fig.12 As shown in the figure, when the heat pump system is turned on for heating, the controller controls the solenoid valve to close, the variable frequency water pump to start, the compressor to run for 2 minutes, and the outdoor ambient temperature T is detected. out :

[0130] When Tout>0℃, the controller controls the solenoid valve to open and obtains the temperature T of the radiator of the electronic controller. 散 :

[0131] If the heat sink temperature T 散 When the temperature is greater than the preset threshold value Y℃, the controller controls the solenoid valve to close and increase the speed of the water pump;

[0132] If the heat sink temperature T 散 If the temperature is less than or equal to the preset temperature threshold Y℃, the controller obtains the outlet water temperature T 出水 , and judge T 出水 With T 进水 The difference:

[0133] If T 出水 -T 进水 <5℃, the controller reduces the speed of the variable frequency water pump;

[0134] If 5℃≤T 出水 -T 进水 ≤8℃, the controller maintains the speed of the variable frequency water pump;

[0135] If 8℃<T出水 -T 进水 , the controller increases the speed of the variable frequency water pump.

[0136] When Tout≤0℃, the controller obtains the temperature T of the radiator of the electronic controller. 散 :

[0137] If the heat sink temperature T 散 When the temperature is greater than the preset threshold value Y℃, the solenoid valve is opened to increase the speed of the water pump.

[0138] If the heat sink temperature T 散 Less than or equal to the preset temperature threshold Y℃, judge T 出水 With T 进水 The difference:

[0139] If T 出水 -T 进水 <5℃, the controller reduces the speed of the variable frequency water pump;

[0140] If 5℃≤T 出水 -T 进水 ≤8℃, the controller maintains the speed of the variable frequency water pump;

[0141] If 8℃<T 出水 -T 进水 , the controller increases the speed of the variable frequency water pump.

[0142] The embodiment of the present application sets up a water-cooled heat dissipation circuit connected to the heat exchanger of the heat pump system. The circulating water of the water-cooled heat dissipation circuit first passes through the outdoor air duct where the condenser is located to perform convection heat exchange on the circulating water, and then passes through the radiator of the electric controller to cool the radiator of the electric controller, and the circulating water returns to the heat exchanger. The water in the heat exchanger cools the radiator of the electric controller, which is safe, environmentally friendly, and has high heat dissipation efficiency. By controlling the water temperature of the water-cooled heat dissipation, the condensation problem of the electric controller can be solved, and the waste heat of the radiator of the electric controller can be recovered. During defrosting, the circulating water is heated by absorbing the waste heat generated by the electric controller to prevent the water temperature from being too low and freezing the heat exchanger.

[0143] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0144] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A heat pump system, characterized in that: include: A refrigerant circulation loop, for circulating the refrigerant in a loop consisting of at least a compressor, a condenser and a heat exchanger; An electronic controller, at least used to control the compressor; A heat dissipation structure, used for dissipating heat from a radiator of the electronic controller; Wherein, the heat dissipation structure comprises: A water-cooling heat dissipation circuit, wherein the water inlet of the water-cooling heat dissipation circuit is connected to the water outlet of the heat exchanger, and the water outlet of the water-cooling heat dissipation circuit is connected to the water inlet of the heat exchanger; a water pump is provided on the water-cooling heat dissipation circuit; the radiator of the electronic controller is provided in the water-cooling heat dissipation circuit; The water cooling circuit is used to receive the water output by the heat exchanger, and after water cooling the radiator of the electronic controller, output the water to the water inlet end of the heat exchanger.

2. The heat pump system according to claim 1, characterized in that: It also includes a controller, which is in communication with the water pump and is used to control the working state of the water pump.

3. The heat pump system according to claim 2, characterized in that: The water-cooled heat dissipation circuit includes a first branch and a second branch, the water inlet of the first branch is connected to the water outlet of the heat exchanger, and after the first branch passes through the heat dissipation area of ​​the condenser, the water outlet of the first branch is connected to the pipeline where the radiator of the electronic controller is located; the water inlet of the second branch is connected to the water outlet of the heat exchanger, and the water outlet of the second branch is connected to the pipeline where the radiator of the electronic controller is located.

4. The heat pump system according to claim 3, characterized in that: The second branch is provided with a solenoid valve which is in communication with the controller, and the controller is used to control the switch state of the solenoid valve according to the working mode of the heat pump system.

5. The heat pump system according to claim 2, characterized in that: It also includes a first temperature detection device that is communicatively connected to the controller, and the first temperature detection device is disposed on a heat sink of the electric controller; The first temperature detection device is used to detect the temperature of the radiator of the electronic controller and send it to the controller. The controller adjusts the speed of the water pump according to the temperature of the radiator of the electronic controller.

6. The heat pump system according to claim 5, characterized in that: It also includes a second temperature detection device and a third temperature detection device that are communicatively connected to the controller, the second temperature detection device is arranged in the water cooling heat dissipation circuit, at the water inlet of the radiator of the electric controller, and the third temperature detection device is arranged in the water cooling heat dissipation circuit, at the water outlet of the radiator of the electric controller; The second temperature detection device is used to detect the inlet water temperature and send it to the controller; The third temperature detection device is used to detect the outlet water temperature and send it to the controller; The controller is used to adjust the rotation speed of the water pump according to the water inlet temperature and the water outlet temperature.

7. The heat pump system according to claim 6, characterized in that: The controller is also used to obtain the dew point temperature, and adjust the rotation speed of the water pump according to the dew point temperature and the inlet water temperature.

8. The heat pump system according to claim 7, characterized in that: Also comprising a fourth temperature detection device and a humidity detection device communicatively connected to the controller; The fourth temperature detection device is used to detect the ambient temperature and send it to the controller; The humidity detection device is used to detect the ambient humidity and send it to the controller; The controller is used to determine the dew point temperature according to the ambient temperature and the ambient humidity.

9. A heat dissipation control method, characterized in that: Based on the heat pump system according to any one of claims 1 to 8, the method comprises: Receive water cooling start signal; In response to the water cooling start signal, the water cooling heat dissipation circuit is controlled to work, so that the water cooling heat dissipation circuit is connected to the water output by the heat exchanger, and after the radiator of the electronic controller is water-cooled and dissipated, the water is output to the water inlet end of the heat exchanger.

10. The method according to claim 9, characterized in that The control of the water cooling circuit operation includes: Obtaining an operating mode of the heat pump system; According to the working mode of the heat pump system, the flow state of the water cooling heat dissipation circuit is controlled.

11. The method according to claim 10, characterized in that The water cooling heat dissipation circuit includes a first branch and a second branch, and a solenoid valve is provided on the second branch. According to the working mode of the heat pump system, the flow state of the water cooling heat dissipation circuit is controlled, including: According to the working mode of the heat pump system, the switch state of the solenoid valve is controlled.

12. The method according to claim 11, characterized in that According to the working mode of the heat pump system, controlling the switch state of the solenoid valve includes: If the working mode of the heat pump system is the cooling mode, controlling the solenoid valve to open; If the working mode of the heat pump system is the heating mode, the solenoid valve is controlled to be closed.

13. The method according to claim 10, characterized in that According to the working mode of the heat pump system, controlling the flow state of the water cooling circuit includes: Acquire a current temperature corresponding to the working mode of the heat pump system, wherein the current temperature includes a temperature of a radiator of an electric controller, a water inlet temperature at a water inlet of the radiator of the electric controller, and one of a dew point temperature and a water outlet temperature at a water outlet of the radiator of the electric controller; According to the current temperature, the rotation speed of the water pump is adjusted in an optional adjustment manner; the optional adjustment manner includes increasing, decreasing or maintaining the rotation speed of the water pump.

14. The method according to claim 13, characterized in that If the working mode of the heat pump system is the cooling mode, the current temperature includes the temperature of the radiator of the electronic controller, the water inlet temperature at the water inlet of the radiator of the electronic controller, and the dew point temperature; The step of adjusting the rotation speed of the water pump in an optional adjustment manner according to the current temperature includes: If the temperature of the radiator of the electronic controller is greater than a preset temperature threshold, increasing the speed of the water pump; If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the speed of the water pump is adjusted according to the target adjustment method corresponding to the interval in which the temperature difference between the inlet water temperature and the dew point temperature lies, and the target adjustment method includes increasing, decreasing or maintaining the speed of the water pump.

15. The method according to claim 13, characterized in that If the working mode of the heat pump system is the heating mode, the current temperature includes the temperature of the radiator of the electronic controller, the water inlet temperature at the water inlet of the radiator of the electronic controller, and the water outlet temperature at the water outlet of the radiator of the electronic controller; The step of adjusting the rotation speed of the water pump in an optional adjustment manner according to the current temperature includes: If the temperature of the radiator of the electronic controller is greater than a preset temperature threshold, increasing the speed of the water pump; If the temperature of the radiator of the electronic controller is less than or equal to the preset temperature threshold, the speed of the water pump is adjusted according to the target adjustment method corresponding to the interval of the temperature difference between the outlet water temperature and the inlet water temperature. The target adjustment method includes increasing, decreasing or maintaining the speed of the water pump.

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