Heat pump system

Abstract

The utility model discloses a heat pump system, which is characterized in that a heat storage device is added, is connected with a second outdoor pipeline of an outdoor heat exchanger through a second circulating device, can exchange energy with the outdoor heat exchanger and store heat released by the outdoor heat exchanger, and is connected with a first water tank through a third circulating device; the heat storage device can exchange heat with the first water tank, and therefore heat recycling of the outdoor heat exchanger is achieved through the heat storage device.

Description

Technical Field

[0001] This utility model relates to the field of heat pump system technology, and in particular to a heat pump system with heat storage function. Background Technology

[0002] A heat pump system consists of a refrigerant circulation system comprising a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger.

[0003] The outdoor heat exchanger is equipped with an outdoor fan, which is used to regulate the temperature of the outdoor heat exchanger. When the heat pump system is heating, the outdoor heat exchanger is cooled by air, and the heat generated by the outdoor heat exchanger is wasted by blowing it into the air.

[0004] Existing technologies fail to effectively utilize the heat released by outdoor heat exchangers, resulting in energy waste.

[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0006] This invention proposes a heat pump system that solves the technical problem of heat waste generated by the outdoor heat exchanger in existing heat pump systems.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] A heat pump system, comprising:

[0009] The refrigerant circulation system includes: a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and a first heat exchanger;

[0010] First water tank;

[0011] Thermal storage devices;

[0012] The outdoor heat exchanger includes a first outdoor pipe and a second outdoor pipe, wherein the first outdoor pipe is connected to the refrigerant circulation system.

[0013] The first heat exchanger includes a first pipeline and a second pipeline, wherein the first pipeline is connected to a refrigerant circulation system;

[0014] The heat pump system includes:

[0015] A first circulation device, wherein the first water tank is connected to a second pipeline through the first circulation device;

[0016] The second circulation device is connected to the second outdoor pipeline through the heat storage device.

[0017] The third circulation device is connected to the first water tank through the heat storage device.

[0018] The above technical solution has the following advantages or beneficial effects: The heat pump system adds a heat storage device, which is connected to the second outdoor pipeline of the outdoor heat exchanger through a second circulation device. The heat storage device can exchange energy with the outdoor heat exchanger and store the heat released by the outdoor heat exchanger. The heat storage device is connected to the first water tank through a third circulation device, and can exchange heat with the first water tank. The heat storage device can also provide defrosting heat for the outdoor heat exchanger. Therefore, the heat recovery and utilization of the outdoor heat exchanger is realized through the heat storage device.

[0019] In some embodiments, when the four-way valve is in the first open state, the first heat exchanger heats and the outdoor heat exchanger cools; when the first circulation device is working, the heat from the first heat exchanger is transferred to the first water tank.

[0020] When the four-way valve is in the second open state, the first heat exchanger cools and the outdoor heat exchanger heats; when the second circulation device is working, the heat from the outdoor heat exchanger is transferred to the heat storage device; when the third circulation device is working, the heat from the heat storage device is transferred to the first water tank.

[0021] The above technical solution has the following advantages or beneficial effects: When the heat pump system is in cooling mode, the heat storage device collects and stores the heat generated by the outdoor heat exchanger and heats the first water tank; when in heating mode, the heat generated by the first heat exchanger heats the first water tank.

[0022] In some embodiments, the four-way valve is switched to a second open state and / or the second circulation device is operated to defrost the outdoor heat exchanger.

[0023] The above-mentioned technical solution has the following advantages or beneficial effects: it can defrost the outdoor heat exchanger using the heat stored in the heat pump system itself and / or the heat storage device; defrosting the outdoor heat exchanger using the heat stored in the heat storage device can also reduce the adverse effects of the defrosting process on the heating performance of the heat pump system. When both methods are used for defrosting simultaneously, the defrosting efficiency can be improved and the defrosting time can be reduced.

[0024] In some embodiments, when the third circulation device is in operation, the heat from the first water tank is transferred to the heat storage device.

[0025] The above technical solution has the following advantages or beneficial effects: during defrosting, the heat of the first water tank can be transferred to the heat storage device to increase the heat of the heat storage device.

[0026] In some embodiments, the outdoor heat exchanger is equipped with an outdoor fan.

[0027] The above technical solution has the following advantages or beneficial effects: it accelerates the heat transfer of the outdoor heat exchanger by using an outdoor fan.

[0028] In some embodiments, the heat pump system includes:

[0029] The second water tank is connected to the second pipeline via the fourth circulation device.

[0030] The above technical solution has the following advantages or beneficial effects: it expands the function of the heat pump system by adding a second water tank.

[0031] In some embodiments, a first switching device is provided between the first water tank and the second pipeline;

[0032] A second switch device is installed between the second water tank and the second pipeline.

[0033] The above technical solution has the following advantages or beneficial effects: by setting the first switch device and the second switch device, the first water tank and the second water tank can be controlled to exchange heat with the first heat exchanger as needed.

[0034] In some embodiments, the first water tank is connected to a first branch pipe, and the first switch device is located on the first branch pipe;

[0035] The second water tank is connected to a second branch pipe, and the second switch device is located on the second branch pipe;

[0036] The second pipeline is connected to a main pipe, and the first and second branch pipes are both connected to the main pipe. The main pipe is equipped with a third switch device.

[0037] The above technical solution has the following advantages or beneficial effects: the on / off state of the main pipe can be controlled by setting a third switching device.

[0038] In some embodiments, when the first and second switching devices are turned on and the third switching device is turned off, the first circulation device and / or the fourth circulation device operate to transfer heat between the second water tank and the first water tank.

[0039] The above technical solution has the following advantages or beneficial effects: it realizes the transfer of heat between the first water tank and the second water tank.

[0040] In some embodiments, the first water tank is a domestic hot water tank, and the second water tank is a buffer water tank.

[0041] The above technical solution has the following advantages or beneficial effects: hot water for domestic use is achieved through a domestic hot water tank, and room cooling and heating are achieved through a buffer tank.

[0042] In some embodiments, the heat pump system includes a room heat exchanger, which is connected to the buffer tank via a fifth circulation device.

[0043] The buffer tank is equipped with a water level monitoring device and a water replenishment device.

[0044] The above technical solution has the following advantages or beneficial effects: the room heat exchanger is connected to the buffer water tank through the fifth circulation device to realize the energy exchange between the room heat exchanger and the buffer water tank; the buffer water tank is equipped with a water level monitoring device and a water replenishment device to realize the water level monitoring and water replenishment of the buffer water tank.

[0045] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of a heat pump system according to an embodiment.

[0048] Figure 2 This is a schematic diagram of a heat pump system according to another embodiment.

[0049] Figure 3 This is a schematic diagram of a heat pump system according to another embodiment.

[0050] Figure 4 This is a schematic diagram of a heat pump system for domestic hot water circulation according to another embodiment.

[0051] Figure 5 This is a schematic diagram of a heat pump room heating cycle according to another embodiment.

[0052] Figure 6 This is a schematic diagram of a domestic hot water room heating circulation system according to another embodiment.

[0053] Figure 7 This is a schematic diagram of a heat pump cooling energy storage cycle according to another embodiment.

[0054] Figure 8 This is a schematic diagram of a domestic hot water circulation system based on another embodiment of an energy storage system.

[0055] Figure 9 This is a schematic diagram of a heat pump defrosting cycle according to another embodiment.

[0056] Figure 10 This is a schematic diagram of an energy storage defrosting cycle according to another embodiment.

[0057] Figure 11 This is a schematic diagram of a heat pump and energy storage defrosting cycle according to another embodiment.

[0058] Figure 12 This is a schematic diagram of the energy conversion cycle between domestic hot water and a thermal storage device, according to another embodiment.

[0059] In the picture:

[0060] 11. Compressor; 12. Four-way valve; 13. Outdoor heat exchanger; 131. First outdoor pipeline; 132. Second outdoor pipeline; 14. Throttling device; 15. First heat exchanger; 151. First pipeline; 152. Second pipeline;

[0061] 101. First water tank; 102. First circulation device; 103. Water replenishment device; 104. Switch valve; 105. Water pump; 106. First switching device;

[0062] 201. Second water tank; 202. Second switching device; 204. Fourth circulation device;

[0063] 3. Thermal storage device; 302. Secondary circulation device; 303. Thirdary circulation device

[0064] 4. Room heat exchanger; 5. Fifth circulation device;

[0065] 6. Third switching device. Detailed Implementation

[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0067] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0069] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal conduction of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0071] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes or the use of other materials.

[0072] A heat pump system includes a refrigerant circulation system and a water circulation system.

[0073] A refrigerant cycle system executes a refrigeration cycle using a compressor, condenser, throttling device, and evaporator. The refrigeration cycle involves a series of processes, including compression, condensation, expansion, and evaporation, to cool or heat an indoor space.

[0074] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0075] The throttling device expands the high-temperature, high-pressure liquid refrigerant that condenses in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the throttling device and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled.

[0076] A water circulation system can include devices for heating or cooling a room. The water circulation system can exchange heat with a condenser or evaporator, indirectly heating or cooling the room. In this case, the water circulation system can include underfloor heating, radiators, etc.

[0077] A water circulation system may include domestic water supply devices, and the system may exchange heat with a condenser to obtain domestic hot water. The water circulation system may also include a domestic water tank.

[0078] exist Figure 1 In this example, the heat pump system includes a refrigerant circulation system, a first water tank, and a heat storage device. The heat storage device collects and stores the heat generated by the outdoor heat exchanger of the refrigerant circulation system, enabling the recovery and reuse of heat from the outdoor heat exchanger.

[0079] The refrigerant circulation system includes: compressor 11, four-way valve 12, outdoor heat exchanger 13, throttling device 14, and first heat exchanger 15.

[0080] Compressor 11, four-way valve 12, outdoor heat exchanger 13, throttling device 14, first heat exchanger 15, four-way valve 12 and compressor 11 are connected in sequence to form a refrigerant circulation loop.

[0081] The first water tank 101 is used to hold water.

[0082] The heat storage device 3 is used to store heat.

[0083] The outdoor heat exchanger 13 includes a first outdoor pipe 131 and a second outdoor pipe 132. The first outdoor pipe 131 is connected to the refrigerant circulation system, and the second outdoor pipe 132 is connected to the heat storage device 3.

[0084] The first heat exchanger 15 includes a first pipe 151 and a second pipe 152. The first pipe 151 is connected to the refrigerant circulation system, and the second pipe 152 is connected to the first water tank 101.

[0085] The heat pump system includes a first circulation device 102, a second circulation device 302, and a third circulation device 303.

[0086] The first water tank 101 is connected to the second pipeline 152 through the first circulation device 102.

[0087] The heat storage device 3 is connected to the second outdoor pipeline 132 through the second circulation device 302, and the heat storage device 3 is connected to the first water tank 101 through the third circulation device 303.

[0088] A heat storage device 3 is added to the heat pump system. The heat storage device 3 is connected to the second outdoor pipe 132 of the outdoor heat exchanger 13 through the second circulation device 302 and to the first water tank 101 through the third circulation device 303. The heat storage device 3 can exchange energy with the outdoor heat exchanger 13 and store the heat released by the outdoor heat exchanger 13. The heat storage device 3 can also exchange heat with the first water tank 101. After collecting and storing the heat generated by the outdoor heat exchanger 13, it can heat the first water tank 101. The heat storage device 3 can also provide defrosting heat for the outdoor heat exchanger 13. Therefore, the heat recovery and utilization of the outdoor heat exchanger 13 is realized through the heat storage device 3.

[0089] In some embodiments, the number of first water tanks 101 is at least one.

[0090] In some embodiments, the outdoor heat exchanger 13 further includes fins, and the outdoor heat exchanger 13 is configured with an outdoor fan.

[0091] The fins can dissipate heat from the outdoor heat exchanger 13, and can improve the heat dissipation effect of the outdoor heat exchanger 13 when the outdoor fan is started.

[0092] In some embodiments, when the four-way valve 12 is in a first open state, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. When the four-way valve 12 is in a second open state, the first heat exchanger 15 cools and the outdoor heat exchanger 13 heats.

[0093] When the four-way valve 12 is in the first open state, the first circulation device 102 operates to transfer the heat of the first heat exchanger 15 to the first water tank 101.

[0094] When the four-way valve 12 is in the first conducting state, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools, and the first circulation device 102 works to transfer the heat of the first heat exchanger 15 to the first water tank 101, thereby achieving the heating of the first water tank 101, that is, the heat generated by the heat pump system heats the first water tank 101.

[0095] When the four-way valve 12 is in the second open state, the second circulation device 302 works to transfer the heat from the outdoor heat exchanger 13 to the heat storage device 3, where the heat is collected and stored.

[0096] In some embodiments, the third circulation device 303 operates to transfer heat from the heat storage device 3 to the first water tank 101.

[0097] When the four-way valve 12 is in the second open state, the first heat exchanger 15 cools and the outdoor heat exchanger 13 heats. The second circulation device 302 operates to transfer the heat from the outdoor heat exchanger 13 to the heat storage device 3, where the heat is collected and stored. The third circulation device 303 operates to transfer the heat from the heat storage device 3 to the first water tank 101, thus heating the first water tank 101. In other words, the heat generated by the heat storage device 3 heats the first water tank 101.

[0098] When the heat pump system is in cooling mode, the heat storage device 3 collects and stores the heat generated by the outdoor heat exchanger 13 and heats the first water tank 101; when the heat pump system is in heating mode, the heat generated by the first heat exchanger 15 heats the first water tank 101.

[0099] In some embodiments, the four-way valve 12 is switched to the second open state, so that the outdoor heat exchanger 13 heats up and the heat pump itself defrosts the outdoor heat exchanger 13.

[0100] In some embodiments, the second circulation device 302 operates to transfer heat from the heat storage device 3 to the outdoor heat exchanger 13 for defrosting. This method does not require switching the state of the four-way valve 12 and does not affect the current heating effect of the heat pump system.

[0101] In some embodiments, the four-way valve 12 is switched to the second open state, so that the outdoor heat exchanger 13 heats up and the outdoor heat exchanger 13 is defrosted by the heat pump itself. The second circulation device 302 works to transfer the heat from the heat storage device 3 to the outdoor heat exchanger 13 and defrost the outdoor heat exchanger 13.

[0102] In some embodiments, the second circulation device 302 is preferably used to transfer the heat from the heat storage device 3 to the outdoor heat exchanger 13 for defrosting.

[0103] The outdoor heat exchanger 13 is defrosted using the heat stored in the heat pump system itself and / or the heat storage device 3. Defrosting the outdoor heat exchanger 13 using the heat stored in the heat storage device 3 can also reduce the adverse effects of the defrosting process on the heating performance of the heat pump system.

[0104] When the four-way valve 12 is in the first open state, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. In winter, when the outdoor temperature is low, the outdoor heat exchanger 13 will frost up, so it needs to be defrosted. Switching the four-way valve 12 to the second open state allows the outdoor heat exchanger 13 to heat, and the heat pump itself defrosts the outdoor heat exchanger 13; and / or, the second circulation device 302 operates to transfer the heat from the heat storage device 3 to the outdoor heat exchanger 13 to defrost it.

[0105] In some embodiments, the third circulation device 303 operates to transfer heat from the first water tank 101 to the heat storage device 3.

[0106] During defrosting, the heat from the first water tank 101 can be transferred to the heat storage device 3 to increase the heat of the heat storage device 3, thereby increasing the defrosting capacity of the heat storage device 3.

[0107] Therefore, the heat pump system can realize the following modes: the heat pump system heating the first water tank, the outdoor heat exchanger supplying heat storage to the heat storage device, the heat storage device supplying heat to the first water tank, the heat pump system defrosting the outdoor heat exchanger, the heat storage device defrosting the outdoor heat exchanger, the heat pump system and the heat storage device defrosting the outdoor heat exchanger, and the first water tank supplying heat storage to the heat storage device.

[0108] (1) Heating mode of the heat pump system for the first water tank: When the four-way valve 12 is in the first conducting state and the compressor 11 is running, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. Control the first circulation device 102 to work so that the heat of the first heat exchanger 15 is transferred to the first water tank 101, thereby realizing the heating of the first water tank 101.

[0109] The compressor 11 compresses the high-temperature gaseous refrigerant, which passes through the four-way valve 12 and exchanges heat with water in the first heat exchanger 15. Then, it passes through the throttling device 14 and vaporizes and absorbs heat in the outdoor heat exchanger 13. Finally, it returns to the compressor 11 through the four-way valve 12, and the cycle continues.

[0110] The first circulation device 102 operates, delivering the circulating water that has absorbed heat in the first heat exchanger 15 to the first water tank 101 to heat the water in the first water tank 101, and so on.

[0111] (2) Outdoor heat exchanger to heat storage device mode: When the four-way valve 12 is in the second open state and the compressor 11 is running, the first heat exchanger 15 cools and the outdoor heat exchanger 13 heats. Control the second circulation device 302 to transfer the heat of the outdoor heat exchanger 13 to the heat storage device 3, and collect and store the heat generated by the outdoor heat exchanger 13 through the heat storage device 3.

[0112] The compressor 11 compresses the high-temperature gaseous refrigerant, which passes through the four-way valve 12 and exchanges heat with water in the outdoor heat exchanger 13. Then, it passes through the throttling device 14 and vaporizes and absorbs heat in the first heat exchanger 15. Finally, it returns to the compressor 11 through the four-way valve 12, and the cycle continues.

[0113] The second circulation device 302 operates, and the circulating water absorbs the heat from the outdoor heat exchanger 13 and then transports it to the heat storage device 3 to heat the phase change medium in the heat storage device 3. As the phase change medium gradually absorbs heat, it will change from a solid to a liquid state, absorbing a large amount of potential heat and storing it in the heat storage device 3. This cycle is repeated to achieve heat recovery.

[0114] When the heat storage device 3 is full of heat, the second circulation device 302 stops, the outdoor fan runs, and heat is exchanged with the outdoor heat exchanger 13 through air cooling.

[0115] (3) Heating mode of the heat storage device for the first water tank: control the third circulation device 303 to work so that the heat of the heat storage device 3 is transferred to the first water tank 101 to achieve the heating of the first water tank 101.

[0116] The third circulation device 303 is in operation. The circulating water absorbs heat in the heat storage device 3. After the heat storage device 3 absorbs heat and stores energy, the phase change medium in it is liquid. As the heat is gradually absorbed and transferred away, it will change from liquid to solid and release a large amount of latent heat energy to heat the circulating water. The heated circulating water is transported to the first water tank 101 to heat the first water tank 101, and so on.

[0117] In winter, when temperatures are low, the four-way valve 12 is in the first open state. When the compressor 11 is running, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. After running for a period of time, the outdoor heat exchanger 13 frosts up and needs to be defrosted. This includes defrosting modes for the outdoor heat exchanger by the heat pump system, defrosting modes for the outdoor heat exchanger by the thermal storage device, or defrosting modes for the outdoor heat exchanger by both the heat pump system and the thermal storage device.

[0118] (4) Defrosting mode of outdoor heat exchanger by heat pump system: Defrosting of outdoor heat exchanger by heat pump system. Switch four-way valve 12 to the second conduction state, compressor 11 runs, first heat exchanger 15 cools, outdoor heat exchanger 13 heats, and the heat generated by outdoor heat exchanger 13 is used for defrosting.

[0119] The compressor 11 compresses the high-temperature gaseous refrigerant through the four-way valve 12 to the outdoor heat exchanger 13 to defrost the outdoor heat exchanger 13. Then, it is throttled by the throttling device 14 and vaporized and absorbed heat in the first heat exchanger 15. It then returns to the compressor 11 through the four-way valve 12, and so on.

[0120] (5) Defrosting mode of outdoor heat exchanger by heat storage device: The outdoor heat exchanger 13 is defrosted by the heat stored in heat storage device 3. Four-way valve 12 is kept in the first open state, and second circulation device 302 is working to transfer the heat of heat storage device 3 to outdoor heat exchanger 13 to defrost outdoor heat exchanger 13.

[0121] The second circulation device 302 is in operation. The circulating water absorbs heat in the heat storage device 3. After the heat storage device 3 absorbs heat and stores energy, the phase change medium in it is in a liquid state. As the heat is gradually absorbed and transferred away, it will change from a liquid state to a solid state and release a large amount of latent heat energy to heat the circulating water. The heated circulating water is transported to the outdoor heat exchanger 13 for defrosting, and so on.

[0122] (6) Defrosting mode of outdoor heat exchanger by heat pump system and heat storage device: When the four-way valve 12 is switched to the second open state, the compressor 11 runs, the first heat exchanger 15 cools, the outdoor heat exchanger 13 heats, and the heat generated by the outdoor heat exchanger 13 is used for defrosting. The second circulation device 302 works to transfer the heat of the heat storage device 3 to the outdoor heat exchanger 13 for defrosting.

[0123] The compressor 11 compresses the high-temperature gaseous refrigerant through the four-way valve 12 to the outdoor heat exchanger 13 to defrost the outdoor heat exchanger 13. Then, it is throttled by the throttling device 14 and vaporized and absorbed heat in the first heat exchanger 15. It then returns to the compressor 11 through the four-way valve 12, and so on.

[0124] The second circulation device 302 is in operation. The circulating water absorbs heat in the heat storage device 3. After the heat storage device 3 absorbs heat and stores energy, the phase change medium in it is in a liquid state. As the heat is gradually absorbed and transferred away, it will change from a liquid state to a solid state and release a large amount of latent heat energy to heat the circulating water. The heated circulating water is transported to the outdoor heat exchanger 13 for defrosting, and so on.

[0125] The outdoor heat exchanger 13 is defrosted simultaneously by the heat pump system and the heat storage device 3, thus shortening the defrosting time.

[0126] (7) The first water tank provides heat storage mode to the heat storage device: control the third circulation device 303 to work, transfer the heat of the first water tank 101 to the heat storage device 3, and realize the heat storage of the heat storage device.

[0127] When the heat storage in the phase change heat storage device 3 is insufficient in winter, heat can be stored in the heat storage device 3 through the first water tank 101.

[0128] The third circulation device 303 operates, and the circulating water absorbs the heat from the first water tank 101 and then transports it to the heat storage device 3 to heat the phase change medium in the heat storage device 3. As the phase change medium gradually absorbs heat, it will change from solid to liquid and absorb a large amount of potential heat, which is stored in the heat storage device 3. This cycle is repeated to achieve heat storage in the heat storage device 3.

[0129] exist Figure 2 In one example, the heat pump system includes a second water tank 201.

[0130] The second water tank 201 is connected to the second pipeline 152 via the fourth circulation device 204.

[0131] The functionality of the heat pump system is expanded by adding a second water tank 201.

[0132] In some embodiments, the first water tank 101 is a domestic hot water tank, and the second water tank 201 is a buffer water tank.

[0133] Hot water for domestic use is provided through a domestic hot water tank, while room cooling and heating are provided through a buffer tank.

[0134] In some embodiments, the heat pump system includes a room heat exchanger 4, which is connected to a buffer tank via a fifth circulation device 5.

[0135] The room heat exchanger 4 is connected to the buffer water tank through the fifth circulation device 5 to realize energy exchange between the room heat exchanger 4 and the buffer water tank.

[0136] In some embodiments, the inlet pipe of the buffer tank is provided with a water replenishment device 103, and the outlet pipe is provided with an outlet pump 105 and a switch valve 104.

[0137] In some embodiments, a first switch device 106 is provided between the first water tank 101 and the second pipeline 152; a second switch device 202 is provided between the second water tank 201 and the second pipeline 152.

[0138] By setting the first switch device 106 and the second switch device 202, it is possible to control whether the first water tank 101 and the second water tank 201 exchange heat with the first heat exchanger 15 as needed.

[0139] exist Figure 3 In the example, the first water tank 101 is connected to the first branch pipe, and the first switch device 106 is located on the first branch pipe; the second water tank 201 is connected to the second branch pipe, and the second switch device 202 is located on the second branch pipe; the second pipeline 152 is connected to the main pipe, and both the first branch pipe and the second branch pipe are connected to the main pipe, and the main pipe is equipped with a third switch device 6.

[0140] The on / off state of the main pipe can be controlled by setting a third switch device 6.

[0141] In some embodiments, when the first switching device 106 and the second switching device 202 are turned on and the third switching device 6 is turned off, the first circulation device 102 and / or the fourth circulation device 204 operate to transfer heat between the second water tank 201 and the first water tank 101.

[0142] It can achieve the transfer of heat between the first water tank 101 and the second water tank 201.

[0143] Therefore, the heat pump system can realize the following modes: heat pump system heating mode for the first water tank, heat pump room heating mode, domestic hot water room heating mode, outdoor heat exchanger to heat storage device mode, heat storage device to the first water tank mode, heat pump system to defrost outdoor heat exchanger mode, heat storage device to defrost outdoor heat exchanger mode, heat pump system and heat storage device to defrost outdoor heat exchanger mode, and first water tank to heat storage device mode.

[0144] (1) Heating mode of the heat pump system for the first water tank: Figure 4 In this example, the four-way valve 12 is in the first open state. When the compressor 11 is running, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. The first circulation device 102 is controlled to work so that the heat from the first heat exchanger 15 is transferred to the first water tank 101, thereby achieving heating of the first water tank 101.

[0145] The compressor 11 compresses the high-temperature gaseous refrigerant, which passes through the four-way valve 12 and exchanges heat with water in the first heat exchanger 15. Then, it passes through the throttling device 14 and vaporizes and absorbs heat in the outdoor heat exchanger 13. Finally, it returns to the compressor 11 through the four-way valve 12, and the cycle continues.

[0146] When the third switch device 6 and the first switch device 106 are turned on, and the second switch device 202 is turned off, the first circulation device 102 is activated, which transports the circulating water that has absorbed heat in the first heat exchanger 15 to the first water tank 101 to heat the water in the first water tank 101, and so on.

[0147] (2) Heat pump room heating mode: In Figure 5 In this example, the four-way valve 12 is in the first open state. When the compressor 11 is running, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. The fourth circulation device 204 is controlled to work so that the heat from the first heat exchanger 15 is transferred to the second water tank 201, thereby enabling the second water tank 201 to heat.

[0148] The compressor 11 compresses the high-temperature gaseous refrigerant, which passes through the four-way valve 12 and exchanges heat with water in the first heat exchanger 15. Then, it passes through the throttling device 14 and vaporizes and absorbs heat in the outdoor heat exchanger 13. Finally, it returns to the compressor 11 through the four-way valve 12, and the cycle continues.

[0149] When the third switch 6 and the second switch 202 are turned on, the first switch 106 is turned off, and the fourth circulation device 204 operates, transporting the circulating water that has absorbed heat in the first heat exchanger 15 to the second water tank 201 to heat the water in the second water tank 201, and so on. The fifth circulation device 5 operates, transporting the hot water in the second water tank 201 to the heat exchangers 4 in each room to provide heating for the rooms.

[0150] (3) Domestic hot water room heating mode: In Figure 6 In the example, when the first switching device 106 and the second switching device 202 are turned on and the third switching device 6 is turned off, the first circulation device 102 and / or the fourth circulation device 204 operate to transfer heat between the second water tank 201 and the first water tank 101.

[0151] The heat from the first water tank 101 is transferred to the second water tank 201. The fifth circulation device 5 operates, delivering the hot water from the second water tank 201 to the room heat exchangers 4 in each room to provide heating for the rooms.

[0152] (4) Outdoor heat exchanger to heat storage device heat storage mode: in Figure 7 In this example, the four-way valve 12 is in the second open state. When the compressor 11 is running, the first heat exchanger 15 cools and the outdoor heat exchanger 13 heats. The second circulation device 302 is controlled to work so that the heat from the outdoor heat exchanger 13 is transferred to the heat storage device 3, and the heat generated by the outdoor heat exchanger 13 is collected and stored through the heat storage device 3.

[0153] The compressor 11 compresses the high-temperature gaseous refrigerant, which passes through the four-way valve 12 and exchanges heat with water in the outdoor heat exchanger 13. Then, it passes through the throttling device 14 and vaporizes and absorbs heat in the first heat exchanger 15. Finally, it returns to the compressor 11 through the four-way valve 12, and the cycle continues.

[0154] When the third switching device 6 and the second switching device 202 are connected and the first switching device 106 is disconnected, the fourth circulation device 204 operates, transporting the circulating water cooled in the first heat exchanger 15 to the second water tank 201 to cool the water in the second water tank 201, and so on. The fifth circulation device 5 operates, transporting the cold water in the second water tank 201 to the room heat exchangers 4 in each room to cool the rooms.

[0155] The second circulation device 302 operates, and the circulating water absorbs the heat from the outdoor heat exchanger 13 and then transports it to the heat storage device 3 to heat the phase change medium in the heat storage device 3. As the phase change medium gradually absorbs heat, it will change from a solid to a liquid state, absorbing a large amount of potential heat and storing it in the heat storage device 3. This cycle is repeated to achieve heat recovery.

[0156] When the heat storage device 3 is full of heat, the second circulation device 302 stops, the outdoor fan runs, and the outdoor heat exchanger 13 is cooled by air.

[0157] (5) Heating mode of the thermal storage device for the first water tank: Figure 8 In the example, the third circulation device 303 is controlled to work so that the heat from the heat storage device 3 is transferred to the first water tank 101, thereby achieving the heating of the first water tank 101.

[0158] The third circulation device 303 is in operation. The circulating water absorbs heat in the heat storage device 3. After the heat storage device 3 absorbs heat and stores energy, the phase change medium in it is liquid. As the heat is gradually absorbed and transferred away, it will change from liquid to solid and release a large amount of latent heat energy to heat the circulating water. The heated circulating water is transported to the first water tank 101 to heat the first water tank 101, and so on.

[0159] In winter, when temperatures are low, the four-way valve 12 is in the first open state. When the compressor 11 is running, the first heat exchanger 15 heats and the outdoor heat exchanger 13 cools. After running for a period of time, the outdoor heat exchanger 13 frosts up and needs to be defrosted. Defrosting modes include: defrosting mode of the heat pump system for the outdoor heat exchanger, defrosting mode of the heat storage device for the outdoor heat exchanger, or defrosting mode of both the heat pump system and the heat storage device for the outdoor heat exchanger.

[0160] (6) Defrosting mode of outdoor heat exchanger in heat pump system: Figure 9 In this example, the outdoor heat exchanger is defrosted using a heat pump system. Switching the four-way valve 12 to the second open state activates the compressor 11, causing the first heat exchanger 15 to cool and the outdoor heat exchanger 13 to heat. The heat generated by the outdoor heat exchanger 13 is used for defrosting.

[0161] The compressor 11 compresses the high-temperature gaseous refrigerant through the four-way valve 12 to the outdoor heat exchanger 13 to defrost the outdoor heat exchanger 13. Then, it is throttled by the throttling device 14 and vaporized and absorbed heat in the first heat exchanger 15. It then returns to the compressor 11 through the four-way valve 12, and so on.

[0162] (7) Defrosting mode of outdoor heat exchanger by heat storage device: In Figure 10 In this example, the heat stored in the heat storage device 3 is used to defrost the outdoor heat exchanger 13. The four-way valve 12 remains in the first open state, and the second circulation device 302 operates to transfer the heat from the heat storage device 3 to the outdoor heat exchanger 13 to defrost it.

[0163] The second circulation device 302 is in operation. The circulating water absorbs heat in the heat storage device 3. After the heat storage device 3 absorbs heat and stores energy, the phase change medium in it is in a liquid state. As the heat is gradually absorbed and transferred away, it will change from a liquid state to a solid state and release a large amount of latent heat energy to heat the circulating water. The heated circulating water is transported to the outdoor heat exchanger 13 for defrosting, and so on.

[0164] (8) Defrosting mode of outdoor heat exchanger for heat pump system and heat storage device: In Figure 11 In this example, the four-way valve 12 is switched to the second open state, the compressor 11 runs, the first heat exchanger 15 cools, the outdoor heat exchanger 13 heats, and the heat generated by the outdoor heat exchanger 13 is used for defrosting. The second circulation device 302 operates to transfer the heat from the heat storage device 3 to the outdoor heat exchanger 13 for defrosting.

[0165] The compressor 11 compresses the high-temperature gaseous refrigerant through the four-way valve 12 to the outdoor heat exchanger 13 to defrost the outdoor heat exchanger 13. Then, it is throttled by the throttling device 14 and vaporized and absorbed heat in the first heat exchanger 15. It then returns to the compressor 11 through the four-way valve 12, and so on.

[0166] The second circulation device 302 is in operation. The circulating water absorbs heat in the heat storage device 3. After the heat storage device 3 absorbs heat and stores energy, the phase change medium in it is in a liquid state. As the heat is gradually absorbed and transferred away, it will change from a liquid state to a solid state and release a large amount of latent heat energy to heat the circulating water. The heated circulating water is transported to the outdoor heat exchanger 13 for defrosting, and so on.

[0167] The outdoor heat exchanger 13 is defrosted simultaneously by the heat pump system and the heat storage device 3, thus shortening the defrosting time.

[0168] (9) The first water tank supplies heat storage to the heat storage device in the following mode: Figure 12 In the example, the third circulation device 303 is controlled to work, transferring the heat from the first water tank 101 to the heat storage device 3, thereby realizing the heat storage of the heat storage device.

[0169] When the heat storage in the phase change heat storage device 3 is insufficient in winter, heat can be stored in the heat storage device 3 through the first water tank 101.

[0170] The third circulation device 303 operates, and the circulating water absorbs the heat from the first water tank 101 and then transports it to the heat storage device 3 to heat the phase change medium in the heat storage device 3. As the phase change medium gradually absorbs heat, it will change from solid to liquid and absorb a large amount of potential heat, which is stored in the heat storage device 3. This cycle is repeated to achieve heat storage in the heat storage device 3.

[0171] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0172] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A heat pump system, comprising: The refrigerant circulation system includes: a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and a first heat exchanger; First water tank; Thermal storage devices; Its features are, The outdoor heat exchanger includes a first outdoor pipe and a second outdoor pipe, wherein the first outdoor pipe is connected to the refrigerant circulation system. The first heat exchanger includes a first pipeline and a second pipeline, wherein the first pipeline is connected to a refrigerant circulation system; The heat pump system includes: A first circulation device, wherein the first water tank is connected to a second pipeline through the first circulation device; The second circulation device is connected to the second outdoor pipeline through the heat storage device. The third circulation device is connected to the first water tank through the heat storage device.

2. The heat pump system according to claim 1, characterized in that, When the four-way valve is in the first open state, the first heat exchanger heats and the outdoor heat exchanger cools; when the first circulation device is working, the heat from the first heat exchanger is transferred to the first water tank. When the four-way valve is in the second open state, the first heat exchanger cools and the outdoor heat exchanger heats. When the second circulation device is working, the heat from the outdoor heat exchanger is transferred to the heat storage device; When the third circulation device is working, the heat from the heat storage device is transferred to the first water tank.

3. The heat pump system according to claim 2, characterized in that, Switch the four-way valve to the second open state and / or operate the second circulation device to defrost the outdoor heat exchanger.

4. The heat pump system according to claim 3, characterized in that, When the third circulation device is working, the heat from the first water tank is transferred to the heat storage device.

5. The heat pump system according to claim 3, characterized in that, The outdoor heat exchanger is equipped with an outdoor fan.

6. The heat pump system according to any one of claims 1-5, characterized in that, The heat pump system includes: The second water tank is connected to the second pipeline via the fourth circulation device.

7. The heat pump system according to claim 6, characterized in that, A first switch device is installed between the first water tank and the second pipeline; A second switch device is installed between the second water tank and the second pipeline.

8. The heat pump system according to claim 7, characterized in that, The first water tank is connected to a first branch pipe, and the first switch device is located on the first branch pipe; The second water tank is connected to a second branch pipe, and the second switch device is located on the second branch pipe; The second pipeline is connected to a main pipe, and the first and second branch pipes are both connected to the main pipe. The main pipe is equipped with a third switch device.

9. The heat pump system according to claim 8, characterized in that, When the first and second switching devices are turned on and the third switching device is turned off, the first circulation device and / or the fourth circulation device operate to transfer heat between the second water tank and the first water tank.

10. The heat pump system according to claim 6, characterized in that, The first water tank is a domestic hot water tank, and the second water tank is a buffer water tank.

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