Heat dissipation method of inverter and heat pump system

Abstract

The invention discloses a heat dissipation method of an inverter and a heat pump system.The inverter is arranged in the heat pump system, the heat pump system comprises a hot water tank, the hot water tank is configured to store domestic hot water produced in a hot water production mode of the heat pump system, a heat dissipation pipeline is arranged in the inverter, and the hot water tank is connected with the heat dissipation pipeline; the heat dissipation method comprises the following steps: detecting a first temperature of the inverter in real time; when the first temperature meets a first preset condition, water in the hot water tank is controlled to be fed into the heat dissipation pipeline, so that the water in the heat dissipation pipeline absorbs heat of the inverter, and the water absorbing the heat is fed back to the hot water tank. The problems that the heat dissipation effect of the inverter is poor, and heat generated by the inverter cannot be recycled are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump, in particular to a heat dissipation method of inverter and a heat pump system. BACKGROUND

[0002] At present, for the heat pump system combined with photovoltaic power generation technology, the photovoltaic power generation module can convert solar energy into electric energy to drive the heat pump system to run, thereby reducing the dependence of the heat pump system on traditional grid power. The existing photovoltaic heat pump system has an inverter, so that the direct current generated by the photovoltaic power generation module can be converted into alternating current by the inverter to drive the compressor of the air conditioning system.

[0003] However, since the inverter generates a large amount of heat, the heat pump system needs to be configured with a special heat dissipation device to dissipate heat of the inverter. However, in the current heat dissipation mode, the heat dissipation effect of the inverter is poor, and the heat generated by the inverter cannot be recycled and utilized. SUMMARY

[0004] The main purpose of the present application is to provide a heat dissipation method of inverter and a heat pump system, so as to solve the problem of poor heat dissipation effect of the inverter in the background art and the problem that the heat generated by the inverter cannot be recycled and utilized.

[0005] According to one aspect of the present application, a heat dissipation method of inverter is provided, the inverter is arranged in a heat pump system, the heat pump system comprises a hot water tank configured to store domestic hot water produced in a hot water production mode of the heat pump system, a heat dissipation pipeline is arranged in the inverter, the hot water tank is connected with the heat dissipation pipeline, and the heat dissipation method comprises:

[0006] detecting a first temperature of the inverter in real time;

[0007] when the first temperature meets a first preset condition, sending water in the hot water tank into the heat dissipation pipeline, so that the water in the heat dissipation pipeline absorbs heat of the inverter, and sending the water after absorbing heat back to the hot water tank.

[0008] Further, the first preset condition comprises a condition that the first temperature is higher than a first preset temperature.

[0009] Further, the heat dissipation pipeline is also connected with a tap water supply device, and the heat dissipation method further comprises:

[0010] when the domestic hot water in the hot water tank is discharged to a water terminal, sending cold water provided by the tap water supply device into the heat dissipation pipeline, so that the water in the heat dissipation pipeline absorbs heat of the inverter, and sending the water after absorbing heat to the hot water tank.

[0011] Further, the step of controlling the water in the hot water tank to be sent to the heat dissipation pipeline comprises:

[0012] controlling the water in the hot water tank with a second temperature to be sent to the heat dissipation pipeline, wherein the second temperature is lower than the first temperature.

[0013] Further, after the step of controlling the water in the hot water tank with a second temperature to be sent to the heat dissipation pipeline, the method further comprises:

[0014] controlling the water in the hot water tank to stop being sent to the heat dissipation pipeline when the first temperature is not higher than a second preset temperature, wherein the second preset temperature is higher than the second temperature and lower than the first preset temperature.

[0015] Further, the step of controlling the water in the hot water tank to stop being sent to the heat dissipation pipeline comprises:

[0016] turning off a water pump connected between the heat dissipation pipeline and the hot water tank.

[0017] Further, the step of controlling the water in the hot water tank to be sent to the heat dissipation pipeline comprises:

[0018] starting a water pump connected between the heat dissipation pipeline and the hot water tank, and controlling the water pump to operate for a first preset time length.

[0019] Further, the heat dissipation method further comprises:

[0020] when the water in the hot water tank has a second temperature, the first preset condition comprises a condition that a temperature difference between the first temperature and the second temperature is greater than a third preset temperature.

[0021] Further, the method further comprises:

[0022] obtaining a second temperature of the water in the hot water tank;

[0023] controlling the domestic hot water in the hot water tank to stop being sent to the heat dissipation pipeline when a temperature difference between the first temperature and the second temperature is not greater than a fourth preset temperature.

[0024] In another aspect, the present application also provides a heat pump system, comprising an inverter, wherein the inverter is cooled by the heat dissipation method.

[0025] The heat dissipation method of the inverter provided by the application comprises the following steps: detecting the first temperature of the inverter in real time; when the first temperature meets the first preset condition, sending the water in the hot water tank into the heat dissipation pipeline, so that the water in the heat dissipation pipeline absorbs the heat of the inverter, and then sending the water after absorbing the heat back to the hot water tank. It can be seen that the heat dissipation method provided by the application can realize the heat dissipation of the inverter, and at the same time, the heat generated by the inverter can be used to recycle and reheat the cooled water in the hot water tank. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application. In the drawings:

[0027] Figure 1 The structural schematic diagram of the heat pump system disclosed by an embodiment of the application.

[0028] Figure 2 The structural schematic diagram of the heat pump system in another embodiment of the application.

[0029] Figure 3 The structural schematic diagram of the heat pump system in another embodiment of the application.

[0030] Figure 4 The flowchart of the heat dissipation method of the inverter disclosed by the application;

[0031] Figure 5 The flowchart of the control method of stopping sending the domestic hot water in the hot water tank to the inverter disclosed by the application.

[0032] In the above drawings, the following reference signs are used:

[0033] 10, electric energy providing assembly; 11, photovoltaic power generation system; 111, solar cell panel; 112, photovoltaic control panel; 20, inverter; 21, first inlet; 22, first outlet; 30, hot water tank; 31, second inlet; 32, second outlet; 40, domestic hot water heat exchanger; 41, third inlet; 42, third outlet; 50, fluid distribution assembly; 51, first shunt element; 511, fourth inlet; 512, first shunt outlet; 513, second shunt outlet; 52, water pump; 53, on-off valve; 54, third shunt element; 541, fifth outlet; 542, first inlet; 543, second inlet; 60, controller; 70, second shunt element; 71, fourth outlet; 72, third shunt outlet; 73, fourth shunt outlet; 80, tap water supply device; 90, tri-generation heat pump main machine; 100, refrigerant pipeline. DETAILED DESCRIPTION

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] Currently, in heat pump systems, the heat generated by the inverter 20 is typically dissipated into the air using an air-cooled heat dissipation device. However, this method of heat dissipation is not very effective for the inverter 20, and the heat generated by the inverter 20 is not properly recovered and utilized.

[0038] To address the aforementioned problems, before introducing the inverter's heat dissipation method, the first embodiment of this invention first introduces a heat pump system, please refer to [link to relevant documentation]. Figures 1 to 3 The heat pump system includes an electrical supply component 10, an inverter 20, and a hot water tank 30. The inverter 20 is connected to the electrical supply component 10 and converts the direct current (DC) power from the component into alternating current (AC) power to drive the heat pump system, specifically, to operate the compressor. The inverter 20 generates a significant amount of heat during operation, therefore, it requires heat dissipation.

[0039] The inverter 20 is equipped with heat dissipation pipes, which include a first inlet 21 and a first outlet 22. The hot water tank 30 is configured to store domestic hot water produced in the hot water production mode of the heat pump system, and the hot water tank 30 is equipped with a second inlet 31 and a second outlet 32.

[0040] The first inlet 21 is connected to the second outlet 32, allowing water from the hot water tank 30 to exit from the second outlet 32 ​​and then enter the heat dissipation pipes of the inverter 20 via the first inlet 21. The first outlet 22 is connected to the second inlet 31, allowing water that has absorbed heat from the inverter 20 in the heat dissipation pipes to exit from the first outlet 22 and then return to the hot water tank 30 via the second inlet 31. Therefore, the connection between the inverter 20 heat dissipation pipes and the hot water tank 30 in this manner enables the flow of domestic hot water between the hot water tank 30 and the heat dissipation pipes, effectively dissipating heat from the inverter 20 while simultaneously recovering and utilizing the heat from the inverter 20. When the heat dissipation pipes are installed in the inverter 20, these pipes can be integrally formed within the outer casing or can be a pipe structure attached to the outer wall or interior of the inverter 20. After water enters the heat dissipation pipes, it can absorb the heat of the inverter 20 through the pipe walls. Compared with air cooling, this method can improve the heat dissipation effect of the inverter 20. Moreover, compared with refrigerant cooling, using domestic hot water from the hot water tank 30 to dissipate heat from the inverter 20 will not cause condensation on the inverter 20, which greatly reduces the difficulty of heat dissipation control.

[0041] Inverter 20 typically operates at a temperature below 60℃, but its temperature will rise after a period of operation, for example, usually reaching 70℃. At this point, cooling measures are necessary. Generally, the target temperature set for heating domestic hot water in a heat pump system is 55℃, which is significantly lower than the elevated temperature of inverter 20 (e.g., 70℃). Therefore, even if the domestic hot water temperature reaches the target temperature of 55℃, it can still be used to cool inverter 20, achieving effective heat dissipation. Furthermore, when the domestic hot water in the hot water tank 30 has not reached the target temperature or has reached the target temperature but then decreased, the domestic hot water can quickly reach or recover to the target temperature after absorbing heat from inverter 20, achieving effective heat recovery and utilization from inverter 20.

[0042] In this embodiment, the inverter 20 of the heat pump system is equipped with a heat dissipation pipe, and the hot water tank 30 is equipped with a second inlet 31 and a second outlet 32. The first inlet 21 of the heat dissipation pipe is connected to the second outlet 32, and the first outlet 22 of the heat dissipation pipe is connected to the second inlet 31, which is used to realize the flow of domestic hot water between the hot water tank 30 and the heat dissipation pipe. When the temperature of the inverter 20 is high, the water in the hot water tank 30 can flow into the heat dissipation pipe of the inverter 20 to dissipate heat from the inverter 20, with good heat dissipation effect. The water that has absorbed heat from the inverter 20 in the heat dissipation pipe flows back to the hot water tank 30, realizing the recovery and utilization of the heat from the inverter 20. Therefore, the heat pump system provided in this embodiment can not only dissipate heat from the inverter 20, but also use the heat generated by the inverter 20 to circulate and reheat the cooled water in the hot water tank 30.

[0043] In some embodiments, the heat pump system further includes a fluid distribution assembly 50. A first inlet 21 has a first state connected to a tap water supply device 80 and a second state connected to a second outlet 32. The first inlet 21 is selectively connected to both the tap water supply device 80 and the second outlet 32 ​​via the fluid distribution assembly 50. The fluid distribution assembly 50 is configured to switch the first inlet 21 between the first and second states. Under specific operating conditions of the heat pump system, when the hot water tank 30 releases hot water to the user terminal, the fluid distribution assembly 50 can connect the first inlet 21 to the tap water supply device 80, while cutting off the passage between the first inlet 21 and the second outlet 32. As a result, tap water from the tap water supply device 80 enters the heat dissipation pipes of the inverter 20, using the tap water to dissipate heat from the inverter 20. Tap water is preheated by inverter 20 and then injected into hot water tank 30. This allows the cold tap water to simultaneously dissipate heat from the inverter 20 and preheat the cold water, thus recovering heat from the inverter 20. Furthermore, it prevents the hot water in hot water tank 30 from exceeding its capacity, making the overall operation safer and more reliable. In this embodiment, water terminals may include shower heads in bathrooms and shower rooms, as well as faucets in toilets, kitchens, and other daily washing and cleaning areas.

[0044] When the fluid distribution component 50 switches the first inlet 21 to the second state, water in the hot water tank 30 can flow into the inverter 20 to dissipate heat from the inverter 20. In some embodiments, the hot water tank 30 in this embodiment may include a microchannel water tank, which is a water tank with refrigerant piping 100 wound around it. The refrigerant piping 100 may be a pipe structure wound around the outer peripheral wall of the hot water tank 30, a channel structure disposed within the wall of the hot water tank 30, or a pipe structure disposed on the inner wall of the hot water tank 30, etc. The connection method between the refrigerant piping 100 and the water tank is not limited here. The refrigerant piping 100 is configured to transfer the heat of the refrigerant to the domestic hot water when refrigerant is introduced, thereby achieving the heating of the domestic hot water.

[0045] For example, such as Figure 1 As shown, when the heat pump system includes a triple-heat pump unit 90 and no domestic hot water heat exchanger 40 is installed, the refrigerant pipe 100 from the triple-heat pump unit 90 can be wound around the hot water tank 30 so that the refrigerant pipe 100 wound around the hot water tank 30 can directly exchange heat with the water in the hot water tank 30. At this time, the water in the hot water tank 30 only flows between the hot water tank 30 and the heat dissipation pipes of the inverter 20.

[0046] like Figure 1 As shown, when the hot water tank 30 includes a microchannel water tank, the fluid distribution assembly 50 may include a third diversion element 54, which includes a fifth outlet 541, a first inlet 542, and a second inlet 543. The fifth outlet 541 is connected to the first inlet 21, the first inlet 542 is connected to the second outlet 32, and the second inlet 543 is connected to the tap water supply device 80. When the first inlet 21 is in the first state, the fifth outlet 541 and the second inlet 543 are connected, while the first inlet 542 is closed, allowing cold water to enter the heat dissipation pipes of the inverter 20. When the first inlet 21 is in the second state, the fifth outlet 541 and the first inlet 542 are connected, while the second inlet 543 is closed, allowing water from the hot water tank 30 to enter the inverter 20 for heat dissipation. Thus, by using a third diversion element 54, the connection or disconnection between the first inlet 21 and the hot water tank 30 or the tap water supply device 80 can be achieved. When the heat pump system also includes a controller 60, the third diversion element 54 is electrically connected to the controller 60 so that the controller 60 can control the operating state of the third diversion element 54. The third diversion element 54 may include a three-way valve, the three valve ports of which are respectively used as a fifth outlet 541, a first inlet 542, and a second inlet 543.

[0047] In some embodiments, when the hot water tank 30 includes a microchannel tank, the fluid distribution assembly 50 may further include a water pump 52 connected between the first inlet 542 and the second outlet 32 ​​to pump water from the hot water tank 30 into the inverter 20 by turning on the water pump 52.

[0048] like Figure 2 As shown, the hot water tank 30 is also equipped with a first inlet 33, and the heat pump system also includes a domestic hot water heat exchanger 40. The domestic hot water heat exchanger 40 is configured to transfer refrigerant heat to domestic hot water when the heat pump system is in hot water production mode. The domestic hot water heat exchanger 40 includes a first refrigerant inlet, a first refrigerant outlet, a third inlet 41, and a third outlet 42. The first refrigerant inlet and the first refrigerant outlet are used to connect to the refrigerant pipeline 100 of the heat pump system. The third outlet 42 is connected to the first inlet 33. The third inlet 41 is connected to the second outlet 32.

[0049] The water entering the domestic hot water heat exchanger 40 absorbs heat from the refrigerant, producing domestic hot water which is then stored in the hot water tank 30 for user use. In other words, in hot water production mode, the heat pump system transfers heat from the refrigerant to the domestic hot water through the domestic hot water heat exchanger 40, and then the produced domestic hot water flows to the hot water tank 30 for storage. When the inverter 20 needs to dissipate heat, the domestic hot water in the hot water tank 30 can also flow to the inverter 20 for heat dissipation, and the heat from the inverter 20 is recovered and reused, ensuring that the domestic hot water in the hot water tank 30 does not decrease in temperature due to prolonged storage, and ensuring that the temperature of the domestic hot water meets the user's needs.

[0050] The heat pump system in this embodiment also includes a fluid distribution component 50. The hot water tank 30 is selectively connected to the third inlet 41 and the first inlet 21 via the fluid distribution component 50, enabling the water in the hot water tank 30 to switch between flowing to the domestic hot water heat exchanger 40 and flowing to the inverter 20, or to distribute the flow of water in the hot water tank 30 between the domestic hot water heat exchanger 40 and flowing to the inverter 20. Therefore, in this embodiment, the hot water tank 30 is selectively connected to the third inlet 41 and the first inlet 21, enabling the selective connection of the heat dissipation pipes of the hot water tank 30, the domestic hot water heat exchanger 40, and the inverter 20. When the heat pump system is in hot water production mode, the domestic hot water heat exchanger 40 is connected to the hot water tank 30 via the fluid distribution component 50. When the inverter 20 is detected to be at a high temperature, the hot water tank 30 and the first inlet 21 of the heat dissipation pipe are connected through the fluid distribution component 50 so that the water in the hot water tank 30 can enter the heat dissipation pipe to absorb the heat of the inverter 20. The water that has absorbed the heat will flow back to the hot water tank 30, thus realizing the recovery and utilization of the heat of the inverter 20.

[0051] In some embodiments, the first inlet 21 of the heat dissipation pipe of the inverter 20 has a first state connected to the tap water supply device 80 and a second state connected to the second outlet 32 ​​of the hot water tank 30. The first inlet 21 is selectively connected to the tap water supply device 80 and the second outlet 32 ​​respectively via a fluid distribution assembly 50, which is configured to switch the first inlet 21 between the first state and the second state.

[0052] Under the specific operating conditions of the heat pump system, when the hot water tank 30 releases hot water to the water terminal, the fluid distribution component 50 can connect the first inlet 21 and the tap water supply device 80, while cutting off the passage between the first inlet 21 and the second outlet 32. As a result, the tap water from the tap water supply device 80 enters the heat dissipation pipes of the inverter 20, using the tap water to dissipate heat from the inverter 20. The tap water, after being preheated by the inverter 20, is injected into the hot water tank 30, achieving the simultaneous cooling of the inverter 20 with cold tap water and preheating of cold water, thus recovering heat from the inverter 20. This prevents the hot water in the hot water tank 30 from exceeding its capacity, making the overall operation safer and more reliable. The water terminals in this embodiment may include shower heads in bathrooms and shower rooms, as well as faucets in toilets, kitchens, and other daily washing and cleaning areas.

[0053] Furthermore, when the hot water tank 30 is not releasing hot water to the water terminal, and the inverter 20's heating temperature is higher than a preset temperature (e.g., 70°C), the fluid distribution component 50 can connect the first inlet 21 and the second outlet 32 ​​of the hot water tank 30, while cutting off the passage between the first inlet 21 and the tap water supply device 80. Therefore, the domestic hot water in the hot water tank 30 can flow to the inverter 20's heat dissipation pipes. By circulating the domestic hot water between the inverter 20 and the hot water tank 30, heat dissipation and cooling of the inverter 20, as well as heat recovery, are achieved.

[0054] The heat pump system in this embodiment also includes a controller 60 and a first temperature detector. The controller 60 is electrically connected to the fluid distribution assembly 50 to control the fluid distribution assembly 50 to selectively connect the hot water tank 30, the third inlet 41, and the first inlet 21, and to enable the fluid distribution assembly 50 to control the switching of the first inlet 21 between a first state and a second state.

[0055] A first temperature detector is located on the inverter 20 and electrically connected to the controller 60. The first temperature detector is used to transmit the detected first temperature of the inverter 20 to the controller 60. The first temperature detector may include a thermistor, an infrared temperature measuring element, a thermocouple temperature sensor, etc.

[0056] The controller 60 is configured to switch the first inlet 21 to a second state when the first temperature is higher than the first preset temperature. The first preset temperature may be no less than 67°C, such as 67°C, 68°C, 69°C, 70°C, 71°C, 72°C, 73°C, etc. Therefore, in this embodiment, when the first temperature of the inverter 20 is higher than the first preset temperature, the controller 60 controls the fluid distribution component 50 to switch the first inlet 21 to the second state, so that the heat pump system can use the domestic hot water in the hot water tank 30 to effectively dissipate heat and cool the inverter 20, and then re-inject the domestic hot water that has absorbed heat from the inverter 20 into the hot water tank 30.

[0057] In this embodiment, the fluid distribution assembly 50 includes a first diversion element 51, which includes a fourth inlet 511, a first diversion port 512, and a second diversion port 513. The fourth inlet 511 is connected to the second outlet 32, the first diversion port 512 is connected to the first inlet 21, and the second diversion port 513 is connected to the third inlet 41. Therefore, in this embodiment, the heat dissipation pipes of the domestic hot water heat exchanger 40 and the inverter 20 are connected to the hot water tank 30 through a single first diversion element 51, which reduces the complexity of the heat pump system piping connections and lowers the assembly difficulty of the heat pump system.

[0058] The fluid distribution assembly 50 in this embodiment also includes a water pump 52, which is connected between the first diversion element 51 and the second outlet 32. Specifically, the water pump 52 is connected between the fourth inlet 511 and the second outlet 32 ​​of the first diversion element 51. Therefore, whether it is necessary to pump water from the hot water tank 30 into the inverter 20 or the domestic hot water heat exchanger 40, only one water pump 52 is required, reducing the number of water pumps used and lowering the cost of the heat pump system.

[0059] The first diversion element 51 may include a three-way valve, whose three ports are used as the fourth inlet 511, the first diversion port 512, and the second diversion port 513, respectively. The heat pump system can flexibly adjust the opening of the three-way valve according to the water temperature of the hot water tank 30 and the temperature of the inverter 20, thereby guiding an appropriate amount of water to the inverter 20 or the domestic hot water heat exchanger 40. Especially when cooling the inverter 20, it can ensure that enough water flows through the inverter 20, effectively improving the heat dissipation effect.

[0060] The fluid distribution assembly 50 in this embodiment also includes a switching valve 53, which is disposed in the passage between the tap water supply device 80 and the first inlet 21. Thus, the heat pump system can control the switching valve 53 to open or close the cooling pipes between the tap water supply device 80 and the inverter 20.

[0061] In some implementations, such as Figure 3 As shown, in this embodiment, the second inlet 31 is connected to both the third outlet 42 of the domestic hot water heat exchanger 40 and the first outlet 22. The hot water tank 30 also has a second inlet 34, which can be used only to supply tap water flowing through the inverter 20 into the hot water tank 30 when the first inlet 21 is in the first state.

[0062] When the first inlet 21 is in the second state, the domestic hot water flowing from the second outlet 32 ​​of the hot water tank 30 can return to the hot water tank 30 through the second inlet 31 instead of entering the hot water tank 30 through the second inlet 34 after passing through the inverter 20. At this time, the heat pump system may also include a second diversion element 70. The second diversion element 70 includes a fourth outlet 71, a third diversion port 72, and a fourth diversion port 73. The fourth outlet 71 is connected to the second inlet 34, the first outlet 22 is connected to the third diversion port 72, and the third outlet 42 and the second inlet 31 are connected to the fourth diversion port 73. The second diversion element 70 is configured such that when the first inlet 21 is in the first state, the fourth outlet 71 and the third diversion port 72 are connected, so that water from the tap water supply device flows through the inverter 20 and enters the hot water tank 30 through the second inlet 34; and when the first inlet 21 is in the second state, the third diversion port 72 and the fourth diversion port 73 are connected.

[0063] Therefore, when the first inlet 21 is in the first state, the second diversion element 70 allows the tap water flowing through the inverter 20 to flow into the hot water tank 30 through the second inlet 34. When the first inlet 21 is in the second state, the second diversion element 70 allows the domestic hot water flowing through the inverter 20 and the domestic hot water from the domestic hot water heat exchanger 40 to return to the hot water tank 30 and ultimately be used by the user terminal. The second diversion element 70 may also include a three-way valve, with its three ports serving as the fourth outlet 71, the third diversion port 72, and the fourth diversion port 73, respectively. The three-way valve is easy to control, and the water flow rate into the hot water tank 30 can be adjusted by controlling the opening degree of each of its ports.

[0064] In this embodiment, the first diversion element 51, water pump 52, switching valve 53, and second diversion element 70 can all be electrically connected to the controller 60 so that the controller 60 can control each device.

[0065] In this embodiment, the controller 60 is further configured to control the fluid distribution component 50 to switch the first inlet 21 to the first state or to shut down the fluid distribution component 50 when the first temperature is not higher than the second preset temperature. The second preset temperature may be a temperature with a temperature difference of not less than 5°C from the target temperature of domestic hot water (e.g., 55°C), such as 60°C, 61°C, 62°C, etc.

[0066] Therefore, after the inverter 20's first temperature drops to a second preset temperature (e.g., 60°C), the controller 60 can control the fluid distribution component 50 to stop directing water from the hot water tank 30 to the inverter 20, thus preventing ineffective cooling of the inverter 20. Specifically, during the release of hot water from the hot water tank 30 to the water user, the controller 60 can control the fluid distribution component 50 to connect the first inlet 21 to the tap water supply device 80, thereby further cooling the inverter 20 through tap water. Alternatively, if the inverter 20's temperature is already low, the fluid distribution component 50 can be directly shut off, ceasing further cooling of the inverter 20.

[0067] The heat pump system in this embodiment also includes a second temperature detector, which is disposed in the hot water tank 30 and electrically connected to the controller 60. The second temperature detector is used to detect the second temperature of the water in the hot water tank 30.

[0068] The controller 60 is also configured to switch the first inlet 21 to a second state when the temperature difference between the first temperature and the second temperature is greater than a third preset temperature. The third preset temperature may be one of 50°C, 51°C, or 51.5°C. At this time, regardless of whether the first temperature is higher than the first preset temperature, the controller 60 can control the fluid distribution component 50 to circulate water from the hot water tank 30 into the inverter 20, effectively cooling the inverter 20 and simultaneously recovering heat from it. When the temperature difference between the first temperature and the second temperature is greater than the third preset temperature (e.g., 50°C), the heat exchange efficiency between the inverter 20 and the domestic hot water is high, and the electrical energy consumed by the operating water pump 52 is much less than the energy consumed by heat recovery, effectively improving the energy efficiency of the heat pump system.

[0069] The controller 60 is also configured to cut off the circuit between the first inlet 21 and the second outlet 32 ​​when the temperature difference between the first temperature and the second temperature is not greater than a fourth preset temperature. The fourth preset temperature is one of 30°C, 31°C, or 32°C. Therefore, when the temperature difference is not greater than the fourth preset temperature, the controller 60 controls the fluid distribution component 50 to stop supplying water from the hot water tank 30 to the inverter 20, avoiding ineffective heat dissipation and reducing energy consumption caused by the operation of the water pump 52.

[0070] In this embodiment, the power supply component 10 includes at least one of a power grid system, a photovoltaic power generation system 11, and an energy storage battery. When the power supply component 10 includes the photovoltaic power generation system 11, the photovoltaic power generation system 11 may include solar panels 111, a photovoltaic control board 112, etc. The solar panels 111 are electrically connected to the photovoltaic control board 112 and the inverter 20. The inverter 20 can convert the direct current output from the solar cells into alternating current for use by the heat pump system. The photovoltaic control board 112 is used for overall control of the photovoltaic power generation system 11, such as charging management and protection, load control, system status monitoring and display, etc.

[0071] In some embodiments, the heat pump system as a whole may include the aforementioned power supply component 10 (such as a photovoltaic power generation system 11), a main unit, an indoor terminal unit (such as a ducted air conditioner), a hot water tank 30, etc. The main unit may specifically be a triple-heat pump main unit 90 that integrates a compressor, a domestic hot water heat exchanger 40, an expansion valve, a refrigerant pipeline 100, etc. The triple-heat pump main unit 90 has at least three functional modes: cooling mode, heating mode, and hot water mode.

[0072] When the triple-heat pump unit 90 is in hot water production mode, it can produce domestic hot water by exchanging heat between the water in the hot water tank 30 and the refrigerant in the domestic hot water heat exchanger 40. The hot water tank 30 and the inverter 20 can also be integrated inside the triple-heat pump unit 90 to improve the compactness of the overall heat pump system architecture.

[0073] Inverter 20 is used to convert direct current (DC) to alternating current (AC) to drive the compressor. The DC power can be generated by the photovoltaic power generation system 11, or it can be DC power generated from the power grid (such as mains power) after AC / DC (alternating current to direct current) conversion. Inverter 20 generates a large amount of heat during operation, requiring heat dissipation. The water pump 52 of the fluid distribution assembly 50 is located between the second outlet 32 ​​of the hot water tank 30 and the first diversion element 51 (such as a three-way valve). This ensures that only one water pump 52 is needed whether pumping water from the hot water tank 30 into the domestic hot water heat exchanger 40 or the inverter 20.

[0074] In addition, a tap water supply device 80 that can improve the cold water (tap water) can also be connected to the first inlet 21 of the inverter 20.

[0075] When the heat pump system is in operation, when the hot water tank 30 releases hot water to the water terminal, the tap water supplied by the tap water supply device 80 will be preheated through the heat dissipation pipe of the inverter 20 and then injected into the hot water tank 30. The cold water is used to efficiently dissipate heat from the inverter 20, while preheating the cold water to achieve heat recovery.

[0076] This embodiment combines the existing triple-heat pump unit 90 with the photovoltaic power generation system 11, and organically integrates the domestic hot water in the heat pump system with the inverter 20, eliminating the need for additional heat dissipation devices for the inverter 20 and reducing equipment costs. Simultaneously, it achieves heat recovery and utilization from the inverter 20, improving the energy efficiency of the heat pump system and reducing user operating costs.

[0077] Secondly, to address the problems of poor heat dissipation and inability to recover and utilize the heat generated by the inverter 20 in the background art, the second embodiment of the present invention also provides a heat dissipation method for the inverter 20, wherein the inverter 20 is installed in a heat pump system. The heat pump system can be the heat pump system provided in the first embodiment above. The heat pump system includes a hot water tank 30, which is configured to store domestic hot water produced in the hot water production mode of the heat pump system. The inverter 20 is provided with heat dissipation pipes, and the hot water tank 30 is connected to the heat dissipation pipes.

[0078] like Figure 4 As shown, the heat dissipation method for the inverter 20 provided in this embodiment includes the following steps:

[0079] Step S11: Real-time detection of the first temperature of inverter 20. This first temperature can be obtained by the first temperature detector mentioned above.

[0080] Step S12: When the first temperature meets the first preset condition, control the water in the hot water tank 30 to be sent into the heat dissipation pipe so that the water in the heat dissipation pipe absorbs the heat of the inverter 20 and the water after absorbing the heat is sent back to the hot water tank 30.

[0081] Therefore, the heat dissipation method for the inverter 20 provided in this embodiment detects the first temperature of the inverter 20 in real time. When the first temperature meets the first preset condition, water in the hot water tank 30 is controlled to be sent into the heat dissipation pipe, so that the water in the heat dissipation pipe absorbs the heat of the inverter 20, and the water after absorbing heat is sent back to the hot water tank 30. It can be seen that the heat dissipation method provided in this embodiment not only dissipates heat from the inverter 20, but also uses the heat generated by the inverter 20 to circulate and reheat the cooled water in the hot water tank 30.

[0082] The first preset condition includes a first temperature higher than a first preset temperature. The first preset temperature may be no less than 67℃, such as 67℃, 68℃, 69℃, 70℃, 71℃, 72℃, 73℃, etc. In this case, even if the temperature of the domestic hot water reaches the target temperature of 55℃, the domestic hot water can still effectively cool the inverter 20.

[0083] Therefore, in this embodiment, when the first temperature of the inverter 20 is higher than the first preset temperature, the water in the hot water tank 30 is controlled to be sent into the heat dissipation pipe so that the heat pump system can use the domestic hot water in the hot water tank 30 to dissipate heat and cool down the inverter 20, and the domestic hot water that has absorbed the heat of the inverter 20 is injected back into the hot water tank 30 to achieve the purpose of recovering the heat of the inverter 20.

[0084] In this embodiment, the heat dissipation pipe of the inverter 20 is also connected to the tap water supply device 80 so that the cold water provided by the tap water supply device 80 can also enter the heat dissipation pipe to efficiently dissipate heat from the inverter 20.

[0085] The heat dissipation method provided in this embodiment further includes the following steps:

[0086] During the process of discharging domestic hot water from the hot water tank 30 to the water terminal, the cold water supplied by the tap water supply device 80 is sent into the heat dissipation pipe so that the water in the heat dissipation pipe absorbs the heat of the inverter 20 and the water after absorbing the heat is sent to the hot water tank 30.

[0087] This allows the hot water tank 30 to release hot water while simultaneously using cold water supplied by the tap water supply device 80 to efficiently cool the inverter 20. Furthermore, the cold water, after passing through the inverter 20, becomes hot water at a higher temperature and is recycled back to the hot water tank 30. This achieves heat recovery from the inverter 20 while preventing the hot water tank 30 from overflowing or causing other accidents due to excessive capacity, thus improving the reliability and safety of the heat pump system when cooling the inverter 20.

[0088] In step S12, the step of controlling the water in the hot water tank 30 to be sent into the heat dissipation pipe includes:

[0089] Water at a second temperature in the control box 30 is fed into the cooling pipes, where the second temperature is lower than the first temperature. Therefore, regardless of the water temperature in the hot water box 30, as long as the second temperature is lower than the first temperature of the inverter 20, water from the control box can be fed into the cooling pipes to dissipate heat from the inverter 20.

[0090] After the water at a second temperature in the hot water tank 30 is fed into the heat dissipation pipe, the method provided in this embodiment of the invention further includes the following steps:

[0091] When the first temperature is not higher than the second preset temperature, the water in the hot water tank 30 is stopped from being sent into the heat dissipation pipe. The second preset temperature is higher than the second temperature but lower than the first preset temperature.

[0092] Therefore, once the inverter 20 is cooled by the water in the hot water tank 30 and its temperature gradually decreases to the second preset temperature (e.g., 60°C), it is no longer necessary to use the water in the hot water tank 30 to cool the inverter 20. This is because the heat exchange efficiency between the domestic hot water in the hot water tank 30 and the inverter 20 is low at this point. If domestic hot water is continued to be used to cool the inverter 20, it will not only fail to effectively lower the temperature of the inverter 20, but will also increase energy consumption due to the operation of the water pump 52.

[0093] The steps for controlling the water in the hot water tank 30 to stop being supplied to the heat dissipation pipes include:

[0094] Turn off the water pump 52 that connects the heat dissipation pipes and the hot water tank 30. This avoids energy consumption caused by the water pump 52 operating during this period.

[0095] In this embodiment, the second preset temperature must be higher than the second temperature of the domestic hot water (e.g., the target temperature of 55°C). This is because if the current domestic hot water temperature is the target temperature of 55°C, the temperature of the inverter 20 will never fall below the target temperature of 55°C, regardless of how long the water pump 52 runs. If the second preset temperature for shutting off the water pump 52 (e.g., 60°C) is set below the target temperature of 55°C, the water pump 52 will not stop running, and the temperature of the inverter 20 will not be able to decrease further. Continuing to run the water pump 52 will waste electrical energy and provide almost no cooling effect.

[0096] In this embodiment, the step of controlling the water in the hot water tank 30 to be sent into the heat dissipation pipe includes:

[0097] The water pump 52, connected between the heat dissipation pipes and the hot water tank 30, is started and controlled to run for a first preset duration. Thus, this embodiment avoids excessive energy consumption due to prolonged operation of the water pump 52 by limiting its operation to a first preset duration (e.g., 2 minutes, 3 minutes, 4 minutes, etc.), thereby reducing the energy consumption of the heat pump system and saving user operating costs. For example, the water pump 52 can be designed to run for only 3 minutes after each startup, after which it stops pumping water from the hot water tank 30 into the inverter 20. This avoids additional energy consumption caused by prolonged operation of the water pump 52.

[0098] The heat dissipation method provided in this embodiment also includes the following steps:

[0099] When the water in the hot water tank 30 has a second temperature, the first preset condition includes the condition that the temperature difference between the first temperature and the second temperature is greater than the third preset temperature.

[0100] The third preset temperature is one of 50℃, 51℃, or 51.5℃. At this point, regardless of whether the first temperature is higher than the first preset temperature, water from the hot water tank 30 can be controlled to flow into the cooling pipes to cool the inverter 20. For example, the controller 60 can control the fluid distribution component 50 to circulate water from the hot water tank 30 into the inverter 20, effectively cooling the inverter 20 and simultaneously recovering heat from it. When the temperature difference between the first and second temperatures is greater than the third preset temperature (e.g., 50℃), the heat exchange efficiency between the inverter 20 and the domestic hot water is high, and the electrical energy consumed by the operating water pump 52 is much less than the energy consumed by heat recovery, effectively improving the energy efficiency of the heat pump system.

[0101] In addition, such as Figure 5 As shown, the heat dissipation method provided in this embodiment further includes the following steps:

[0102] Step S21: Obtain the second temperature of the water in the hot water tank 30. The second temperature can be obtained by detecting the second temperature detector mentioned above.

[0103] Step S22: When the temperature difference between the first temperature and the second temperature is no greater than the fourth preset temperature, control the hot water in the hot water tank 30 to stop being supplied to the heat dissipation pipe. In other words, when the temperature difference between the inverter 20 and the hot water is small, stop supplying water from the hot water tank 30 to the inverter 20 to avoid ineffective heat dissipation and reduce energy consumption from running the water pump 52. The fourth preset temperature is one of 30℃, 31℃, or 32℃.

[0104] For example, when the temperature difference between the second temperature of the domestic hot water and the first temperature of the inverter 20 gradually decreases to 30°C, the pumping of water from the hot water tank 30 into the inverter 20 is stopped.

[0105] In summary, this embodiment achieves the function of cooling the inverter 20 using domestic hot water from the heat pump system through the above-described heat dissipation method, eliminating the need for an additional cooling device for the inverter 20 and reducing the cost of the heat pump system. Simultaneously, it also achieves heat recovery and utilization from the inverter 20, improving energy efficiency and reducing user operating costs.

[0106] Furthermore, a third embodiment of the present invention provides a heat pump system, which includes an inverter 20. The inverter 20 dissipates heat through a heat dissipation method. For details of the heat dissipation method of the inverter 20, please refer to the content provided in the second embodiment of the present invention. The specific structure of the heat pump system can be found in the content provided in the first embodiment of the present invention, and will not be repeated here.

[0107] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0108] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0109] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat dissipation method for an inverter, characterized in that, The inverter (20) is installed in a heat pump system, which includes a hot water tank (30). The hot water tank (30) is configured to store domestic hot water produced by the heat pump system in hot water production mode. The inverter (20) is provided with a heat dissipation pipe, and the hot water tank (30) is connected to the heat dissipation pipe. The heat dissipation method includes: The first temperature of the inverter (20) is monitored in real time; When the first temperature meets the first preset condition, the water in the hot water tank (30) is controlled to be sent into the heat dissipation pipe so that the water in the heat dissipation pipe absorbs the heat of the inverter (20) and the water after absorbing the heat is sent back to the hot water tank (30).

2. The heat dissipation method for the inverter according to claim 1, characterized in that, The first preset condition includes the condition that the first temperature is higher than the first preset temperature.

3. The heat dissipation method for the inverter according to claim 1 or 2, characterized in that, The heat dissipation pipe is also connected to a tap water supply device, and the heat dissipation method further includes: During the process of discharging domestic hot water from the hot water tank (30) to the water terminal, the cold water supplied by the tap water supply device is controlled to be sent into the heat dissipation pipe so that the water in the heat dissipation pipe absorbs the heat of the inverter (20) and the water after absorbing the heat is sent to the hot water tank (30).

4. The heat dissipation method for the inverter according to claim 2, characterized in that, The step of controlling the water in the hot water tank (30) to be sent into the heat dissipation pipe includes: Water at a second temperature in the hot water tank (30) is fed into the heat dissipation pipe, wherein the second temperature is lower than the first temperature.

5. The heat dissipation method for the inverter according to claim 4, characterized in that, After water at a second temperature in the hot water tank (30) is fed into the heat dissipation pipe, the method further includes: When the first temperature is not higher than the second preset temperature, the water in the hot water tank (30) is stopped from being sent into the heat dissipation pipe, wherein the second preset temperature is higher than the second temperature and lower than the first preset temperature.

6. The heat dissipation method for an inverter according to claim 5, characterized in that, The steps of controlling the water in the hot water tank (30) to stop being supplied to the heat dissipation pipe include: Turn off the water pump (52) connecting the heat dissipation pipe and the hot water tank (30).

7. The heat dissipation method for an inverter according to claim 1, characterized in that, The steps of controlling the water in the hot water tank (30) to be delivered to the heat dissipation pipe include: Start the water pump (52) connected between the heat dissipation pipe and the hot water tank (30), and control the water pump (52) to run for a first preset time.

8. The heat dissipation method for an inverter according to claim 1, characterized in that, The heat dissipation method further includes: When the water in the hot water tank (30) has a second temperature, the first preset condition includes the condition that the temperature difference between the first temperature and the second temperature is greater than a third preset temperature.

9. The heat dissipation method for an inverter according to claim 1, characterized in that, The method further includes: To obtain a second temperature of the water in the hot water tank (30); When the temperature difference between the first temperature and the second temperature is not greater than the fourth preset temperature, the domestic hot water in the hot water tank (30) is stopped from being sent into the heat dissipation pipe.

10. A heat pump system, characterized in that, The heat pump system includes an inverter (20), which dissipates heat using the heat dissipation method of the inverter according to any one of claims 1 to 9.

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