Heat pump system

Abstract

The utility model belongs to the technical field of heat pumps, and discloses a heat pump system which is characterized in that a control valve group can selectively enable any one of a first heat exchange unit and a first heat exchange channel to be connected into a water return pipeline; when a user has no hot water using requirement and the tail end water using device has the heating requirement, the heat pump assembly does not work, the heat source device provides hot water for the tail end water using device, meanwhile, part of return water of the tail end water using device is fed into the first heat exchange unit, water in the inner container is preheated, and the water temperature in the inner container is made to be higher than the environment temperature; the heat energy is stored by water in the inner container; when a user suddenly needs to use hot water, the heat pump assembly is controlled to work, water in the inner container is heated through the heat pump assembly, the temperature of the water in the inner container is higher than the environment temperature due to the fact that heat energy is stored in the water, and the temperature difference between the water temperature needed by the user and the current water temperature of the inner container is reduced; therefore, the time for the heat pump assembly to lift the water in the inner container to the required water temperature is shortened, and energy consumption of a compressor of the heat pump assembly is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump technical field especially relates to a heat pump system. BACKGROUND

[0002] The existing heating, air conditioning and hot water integrated system, in winter, hot water prepared by the air source heat pump is sent to the floor heating coil pipe to heat the user, the return water of the floor heating coil pipe is sent to the evaporator of the water source heat pump to heat the water in the inner container by the water source heat pump, and the residual heat energy in the return water of the floor heating coil pipe is recovered to reduce the energy consumption of the water source heat pump.

[0003] When the user has no hot water use demand, the air source heat pump is mainly used to provide hot water for the floor heating coil pipe, and the water source heat pump stops working, so that when the user has hot water use demand, the water temperature in the inner container is low when the water source heat pump starts to work, even if the heat energy in the return water of the floor heating coil pipe can be recovered, but it still needs a long time to heat the water in the inner container to the required temperature, and the user experience is not high. INVENTION CONTENTS

[0004] One of the technical problems solved by the utility model is to provide a heat pump system which can improve the hot water heating efficiency in the inner container.

[0005] The above technical problem is solved by the following technical scheme:

[0006] A heat source device and an end water device, a water outlet of the heat source device and a water inlet of the end water device are communicated, a water outlet of the end water device is communicated with a return water inlet of the heat source device through a water use return water pipeline, and the heat source device and the end water device are communicated at the head and tail to form a heating circulation loop.

[0007] A heat pump device, comprising an inner container, a first heat exchange unit arranged in the inner container, a heat pump assembly and a control valve group arranged outside the inner container, the heat pump assembly comprising a compressor, a first heat exchanger, a throttling structure and a second heat exchanger, the first heat exchanger having a first heat exchange channel and a second heat exchange channel, the compressor, the second heat exchange channel, the throttling structure and the second heat exchanger being sequentially communicated at the head and tail to form a heating circulation loop, and the second heat exchanger being used for heating water in the inner container, and the control valve group being capable of selectively connecting any one of the first heat exchange unit and the first heat exchange channel to the water use return water pipeline.

[0008] The heat pump system has the beneficial effects compared with the background art:

[0009] When the user has no hot water demand but the terminal water device has heating needs, the heat pump assembly is not working. The control valve group connects the first heat exchange unit to the water return pipe. While the heat source device provides hot water to the terminal water device, it also sends a portion of the return water from the terminal water device into the first heat exchange unit to preheat the water in the inner tank, making the water temperature in the inner tank higher than the ambient temperature, thus utilizing the stored heat energy in the water in the inner tank. When the user has a hot water demand, the control valve group connects the first heat exchange channel to the water return pipe, controlling the heat pump assembly to work. The heat pump assembly absorbs heat from the water return pipe to heat the water in the inner tank. Because the water in the inner tank is higher than the ambient temperature due to stored heat energy, the temperature difference between the user's demand water temperature and the current water temperature in the inner tank is reduced, thereby shortening the time it takes for the heat pump assembly to raise the water in the inner tank to the demand water temperature and reducing the compressor energy consumption of the heat pump assembly.

[0010] In one embodiment, the water return pipeline has a first connection point and a second connection point, and a one-way valve is provided on the water return pipeline. The one-way valve is located between the first connection point and the second connection point, and the one-way valve only allows water to flow from the first connection point to the second connection point in the water return pipeline.

[0011] The first connection point is selectively connected to either the inlet of the first heat exchange unit or the inlet of the first heat exchange channel; the outlet of the first heat exchange unit and the outlet of the first heat exchange channel are both connected to the second connection point.

[0012] In one embodiment, the control valve group includes a heat pump three-way valve, the inlet of which is connected to the first connection point, the first outlet of which is connected to the inlet of the first heat exchange unit, the second outlet of which is connected to the inlet of the first heat exchange channel, and the inlet of which is selectively connected to either the first outlet or the second outlet of the heat pump three-way valve.

[0013] Alternatively, the control valve assembly includes:

[0014] The first switching valve connects the inlet of the first heat exchange unit to the first connection point.

[0015] The second switching valve connects the inlet of the first heat exchange channel to the first connection point.

[0016] In one embodiment, the inlet of the control valve assembly is connected to the first connection point via a first heat exchange pipeline, and the first heat exchange pipeline is selectively connected to the inlet of the first heat exchange channel or the inlet of the first heat exchange unit via the control valve assembly.

[0017] The outlet of the first heat exchange channel and the outlet of the first heat exchange unit merge and are connected to the second connection point through the second heat exchange pipeline;

[0018] A second circulation pump is installed on either the first heat exchange pipeline or the second heat exchange pipeline.

[0019] In one embodiment, the outlet of the heat source device is connected to the inlet of the terminal water device through a water supply pipeline. The heat pump system also includes a bypass pipeline and a heating control valve. The bypass pipeline is connected in parallel with the terminal water device between the water supply pipeline and the water return pipeline.

[0020] The heating control valve can control the bypass pipeline to selectively disconnect from the water supply pipeline and make the heating circulation loop open, or connect with the water supply pipeline to make the first heat exchange circulation loop formed by the end water device and the first heat exchange channel open.

[0021] In one embodiment, the heat pump system further includes a first circulation pump;

[0022] The first circulating pump is located on the water supply pipeline, and one end of the bypass pipeline is connected between the inlet of the first circulating pump and the outlet of the heat source device; or, the first circulating pump is located on the water return pipeline, and the first circulating pump is located between the outlet of the end water device and the first connection point.

[0023] In one embodiment, the heating control valve includes:

[0024] A heating three-way valve, wherein the first inlet of the heating three-way valve is connected to the bypass pipeline, and the second inlet and the outlet of the heating three-way valve are connected in series to the water supply pipeline;

[0025] Alternatively, the heating control valve may include:

[0026] The first heating switch valve is located in the water supply pipeline;

[0027] The second heating switch valve is located in the bypass pipeline, and one end of the bypass pipeline is connected to the water supply pipeline between the first heating switch valve and the water inlet of the terminal water device.

[0028] In one embodiment, the heat source device is an air source heat pump, a gas-fired water heater, or a boiler.

[0029] In one embodiment, the heat pump device further includes:

[0030] The second heat exchange unit is located inside the inner liner;

[0031] A heat exchange device is located outside the inner liner. The heat exchange device and the second heat exchange unit are connected to form a second heat exchange circulation loop. A third circulation pump is provided on the second heat exchange circulation loop.

[0032] In one embodiment, the heat exchange device is a cooling tower or an air heat exchange structure. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the heat pump system provided in this embodiment of the utility model;

[0034] Figure 2 This is a schematic diagram of a heat pump water heater provided in an embodiment of this utility model;

[0035] Figure 3 This is a state diagram of the heat pump system provided in this embodiment of the present invention when it is operating in the first winter working mode;

[0036] Figure 4 This is a state diagram of the heat pump system provided in this embodiment of the present invention when it is operating in the second winter working mode;

[0037] Figure 5 This is a state diagram of the heat pump system provided in this embodiment of the present invention when it is operating in the third winter working mode;

[0038] Figure 6 This utility model embodiment provides a state diagram of the heat pump system operating in the first summer working mode;

[0039] Figure 7 This utility model embodiment provides a state diagram of the heat pump system operating in the second summer working mode;

[0040] Figure 8 The present invention provides a state diagram of a heat pump system operating in the fourth winter working mode.

[0041] In the picture:

[0042] 1. Heat source device; 2. Terminal water supply device; 21. Manifold; 22. Underfloor heating coil; 3. First circulation pump; 4. Heating control valve; 5. Check valve;

[0043] 10. Heat pump unit; 101. Compressor; 102. First heat exchanger; 103. Throttling structure; 104. Second heat exchanger; 105. Four-way reversing valve; 106. First heat exchange unit; 107. Second heat exchange unit; 108. Second circulating pump; 109. Control valve assembly; 110. Inner liner; 111. Outer shell; 112. Heat exchange device; 113. Third circulating pump;

[0044] 100. Water supply pipeline; 200. Water return pipeline; 300. Bypass pipeline; 400. First heat exchange pipeline; 500. Second heat exchange pipeline. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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 connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] like Figure 1 and Figure 2As shown, an embodiment of this utility model provides a heat pump system, which includes a heat source device 1, a terminal water device 2, and a heat pump device 10. The outlet of the heat source device 1 and the inlet of the terminal water device 2 are connected. The outlet of the terminal water device 2 is connected to the return outlet of the heat source device 1 via a water return pipe 200. The heat source device 1 and the terminal water device 2 are connected end-to-end to form a heating circulation loop. For example, the heat source device 1 is a gas-fired boiler, and the terminal water device 2 is a heating device. The terminal water device 2 includes a manifold 21 and underfloor heating coils 22. The high-temperature water prepared by the heat source device 1 can be sent to the underfloor heating coils 22 through the manifold 21, and the water in the underfloor heating coils 22 can be returned to the inlet of the heat source device 1 through the manifold 21, realizing water circulation in the heating circulation loop.

[0050] In other embodiments, the heat source device 1 may also be an air source heat pump or a boiler, and the terminal water device 2 may also be a fan coil unit, or a combination of a fan coil unit and a floor heating coil 22. For example, the terminal water device 2 uses a floor heating coil 22 when heating and a fan coil unit when cooling.

[0051] Specifically, the outlet of the heat source device 1 is connected to the inlet of the terminal water device 2 through the water supply pipeline 100.

[0052] The heat pump device 10 includes an inner tank 110, a first heat exchange unit 106 disposed within the inner tank 110, and a heat pump assembly and a control valve group 109 disposed outside the inner tank 110. The heat pump assembly includes a compressor 101, a first heat exchanger 102, a throttling structure 103, and a second heat exchanger 104. The first heat exchanger 102 has a first heat exchange channel and a second heat exchange channel. The compressor 101, the second heat exchange channel, the throttling structure 103, and the second heat exchanger 104 are sequentially connected end-to-end to form a heating circulation loop. The second heat exchanger 104 is used to heat the water inside the inner tank 110. The control valve group 109 can selectively connect either the first heat exchange unit 106 or the first heat exchange channel to the water return pipe 200. The hot water in the inner tank 110 is mainly used as domestic hot water, such as for showering. For example, the throttling structure 103 is an electronic expansion valve.

[0053] like Figure 3 As shown, the heat pump system has a first winter working mode. When the user has no need for hot water and the heat energy generated by the heat source device 1 is just enough to meet the needs of the terminal water device 2, the heat pump system operates in the first winter working mode. The high-temperature water generated by the heat source device 1 is sent to the terminal water device 2 to be cooled and then returned to the heat source device 1. The terminal water device 2 absorbs the heat from the high-temperature water to raise the temperature of the surrounding environment.

[0054] like Figure 4As shown, the heat pump system has a second winter working mode. When the user has a hot water demand and the terminal water device 2 has a heating demand, the heat pump system operates in the second winter working mode. The high-temperature water prepared by the heat source device 1 is sent to the terminal water device 2 for cooling. The terminal water device 2 absorbs the heat from the high-temperature water to heat the room. At the same time, the control valve group 109 connects the first heat exchange channel to the water return pipe 200 and controls the heat pump device 10 to work. At least part of the return water from the terminal water device 2 is sent to the first heat exchange channel of the first heat exchanger 102 for cooling and then returns to the heat source device 1. The fluid in the heating circulation loop circulates. The fluid in the heating circulation loop absorbs the energy of the water in the first heat exchange channel and heats up. The fluid in the heating circulation loop releases heat when it reaches the first heat exchanger 102 to heat the water in the inner tank 110.

[0055] By recovering residual heat energy from the wastewater discharged by the end-use water device 2 through the heat pump device 10, and using it to heat the water in the inner tank 110, the power consumption of the compressor 101 in the heat pump device 10 can be reduced, thereby improving the energy efficiency of the heat pump device 10.

[0056] like Figure 5 As shown, the heat pump system has a third winter working mode. When the user has no hot water demand and the terminal water device 2 has heating demand, and the heat energy generated by the heat source device 1 is greater than the heat energy required by the terminal water device 2, the heat pump system operates in the third winter working mode. The high-temperature water generated by the heat source device 1 is sent to the terminal water device 2 for cooling. The terminal water device 2 absorbs the heat from the high-temperature water to heat the room. At the same time, the control valve group 109 connects the first heat exchange unit 106 to the water return pipe 200. At least part of the return water from the terminal water device 2 is sent to the first heat exchange unit 106 for cooling and then returns to the heat source device 1. The first heat exchange unit 106 absorbs the heat energy from the water in the terminal water device 2 to heat the water in the inner tank 110, so that the water temperature in the inner tank 110 is higher than the ambient temperature, thereby achieving the purpose of storing heat energy using the water in the inner tank 110.

[0057] If a user suddenly needs hot water while the heat pump system is operating in the third winter mode, the system will switch to the second winter mode. Since the water in the inner tank 110 is warmer than the ambient temperature due to stored heat, the temperature difference between the user's required water temperature and the current water temperature in the inner tank 110 is reduced. This shortens the time it takes for the heat pump component to raise the water in the inner tank 110 to the required temperature and reduces the energy consumption of the compressor 101 of the heat pump component.

[0058] By switching between the second and third winter working modes, the inner tank 110 can absorb excess heat energy from the water in the terminal water device 2 regardless of whether there is a need for hot water. This not only reduces the temperature fluctuation of the water delivered to the terminal water device 2, but also eliminates the need to frequently start and stop the heat source device 1 when the heat energy provided by the heat source device 1 exceeds the heat energy required by the terminal water device 2, thus improving the working stability of the heat source device 1.

[0059] In some embodiments, such as Figure 1 and Figure 2 As shown, the first heat exchange unit 106 is a heat exchange coil located inside the inner tank 110, which increases the contact area between the first heat exchange unit 106 and the water inside the inner tank 110, thereby improving the heat exchange efficiency between the first heat exchange unit 106 and the water inside the inner tank 110.

[0060] In some embodiments, such as Figure 1 and Figure 2 As shown, the water return pipe 200 has a first connection point and a second connection point. A one-way valve 5 is provided on the water return pipe 200. Along the water flow direction in the water return pipe 200, the one-way valve 5 is located between the first connection point and the second connection point. The one-way valve 5 only allows the water flow in the water return pipe 200 to flow from the first connection point to the second connection point. The first connection point is selectively connected to either the inlet of the first heat exchange unit 106 or the inlet of the first heat exchange channel. The outlet of the first heat exchange unit 106 and the outlet of the first heat exchange channel are both connected to the second connection point.

[0061] By setting a one-way valve 5, the water flowing from the first heat exchange channel to the second connection point will not flow back to the first connection point, ensuring that the heating return water flows unidirectionally in the water return pipe 200, thereby ensuring the heat exchange effect.

[0062] In some embodiments, the control valve assembly 109 includes a heat pump three-way valve. The inlet of the heat pump three-way valve is connected to the outlet of the second circulation pump 108, the first outlet of the heat pump three-way valve is connected to the inlet of the first heat exchange unit 106, and the second outlet of the heat pump three-way valve is connected to the inlet of the first heat exchange channel. Exemplarily, the heat pump three-way valve is a solenoid valve, electrically connected to the controller of the heat pump system, facilitating adjustment of the state of the heat pump three-way valve via the controller.

[0063] For ease of description, the inlet of the heat pump three-way valve is marked as port A1, the first outlet of the heat pump three-way valve is marked as port B1, and the second outlet of the heat pump three-way valve is marked as port C1.

[0064] like Figure 4 As shown, when the heat pump system operates in the second winter mode, ports A1 and C1 are connected, while port B1 is not connected to either port A1 or port C2. Figure 5As shown, when the heat pump system is operating in the third winter working mode, ports A1 and B1 are connected, while port C1 is not connected to either port A1 or port B1.

[0065] In some other embodiments, the control valve assembly 109 may also use two switching valves instead of the aforementioned heat pump three-way valve. For ease of description, the two switching valves are referred to as the first switching valve and the second switching valve, respectively. The inlet of the first heat exchange unit 106 is connected to the first connection point through the first switching valve, and the inlet of the first heat exchange channel is connected to the first connection point through the second switching valve. For ease of control, both the first switching valve and the second switching valve are solenoid valves.

[0066] In some embodiments, such as Figure 1 and Figure 2 As shown, the inlet of the control valve assembly 109 is connected to a first connection point via a first heat exchange pipeline 400. The first heat exchange pipeline 400 is selectively connected to the inlet of the first heat exchange channel or the inlet of the first heat exchange unit 106 via the control valve assembly 109. The outlet of the first heat exchange channel and the outlet of the first heat exchange unit 106 merge and are then connected to a second connection point via a second heat exchange pipeline 500. A second circulation pump 108 is provided in the first heat exchange pipeline 400. In other embodiments, the second circulation pump 108 may also be provided on the second heat exchange pipeline 500.

[0067] Whether the first heat exchange unit 106 is connected to the water return pipe 200 or the first heat exchange channel is connected to the water return pipe 200, the second circulation pump 108 can be used as power to extract a portion of the return water from the terminal water device 2 from the water return pipe 200 and send it to the first heat exchange unit 106 and the first heat exchange channel connected to the water return pipe 200, thereby reducing the number of parts and lowering costs.

[0068] In some embodiments, the second circulation pump 108 is a variable pump, so that the displacement of the second circulation pump 108 can be adjusted, thereby controlling the flow rate of the heating return water entering the first heat exchange channel and controlling the heat released by the heating return water at the first heat exchanger 102.

[0069] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat pump system also includes a bypass pipe 300 and a heating control valve 4. The bypass pipe 300 is connected in parallel with the terminal water device 2 between the water supply pipe 100 and the water return pipe 200. The heating control valve 4 can control the bypass pipe 300 to selectively disconnect from the water supply pipe 100 and make the heating circulation loop open, or connect with the water supply pipe 100 to make the first heat exchange circulation loop formed by connecting the terminal water device 2 and the first heat exchange channel end to end open.

[0070] Specifically, the heat pump system also includes a first circulation pump 3, which is installed on the water supply pipeline 100. One end of the bypass pipeline 300 is connected between the inlet of the first circulation pump 3 and the outlet of the heat source device 1. Since the resistance to the flow of heating water within the terminal water device 2 is relatively large, placing the first circulation pump 3 on the water supply pipeline 100 between the connection point of the bypass pipeline 300 and the water supply pipeline 100 and the inlet of the terminal water device 2 ensures smooth flow of heating water within the terminal water device 2. In other embodiments, the first circulation pump 3 can also be installed on the water return pipeline 200 between the first connection point and the outlet of the terminal water device 2.

[0071] like Figure 6 As shown, the heat pump system also has a first summer working mode. When the terminal water device 2 has a cooling demand and the user has a hot water demand, the heat source device 1 does not work. The heating control valve 4 is controlled to connect the water supply pipeline 100 with the bypass pipeline 300 to conduct the first heat exchange circulation loop formed by connecting the terminal water device 2 and the first heat exchange channel end to end. At the same time, the first circulation pump 3 and the second circulation pump 108 are both controlled to work. The heat pump three-way valve is controlled to connect port A1 and port C1, while port B1 is not connected to ports A1 and C1. Part of the return water from the terminal water device 2 is pumped by the second circulation pump 108 to the first heat exchange channel of the first heat exchanger 102 for cooling. After mixing with the other part of the return water from the terminal water device 2, it returns to the terminal water device 2, which plays a role in cooling the room. At the same time, the heat pump components are controlled to work. The second heat exchanger 104 absorbs the heat energy of the water sent to the first heat exchanger 102 and uses it to heat the water in the inner tank 110.

[0072] In summer, the heat pump device 10 can absorb heat from the underfloor heating coil 22 through the first heat exchanger 102 to heat the water in the inner tank 110. At the same time, it can cool the room through the terminal water device 2, avoiding the disadvantage of requiring a large amount of water and greatly improving the energy efficiency of the heat pump system.

[0073] In some embodiments, such as Figure 6 As shown, the heating control valve 4 includes a heating three-way valve. The first inlet of the heating three-way valve is connected to the bypass pipeline 300, and the second inlet and outlet of the heating three-way valve are connected in series to the water supply pipeline 100. For example, the heating three-way valve is a solenoid valve electrically connected to the controller, facilitating the adjustment of the heating three-way valve's state.

[0074] For ease of description, the first inlet of the heating three-way valve is marked as port A2, the second inlet of the heating three-way valve is marked as port B2, and the outlet of the heating three-way valve is marked as port C2.

[0075] When the heat pump system operates in any of the first, second, and third winter operating modes, ports A2 and C2 are connected, and neither port A2 nor C2 is connected to port B2. When the heat pump system operates in the first summer operating mode, ports B2 and C2 are connected, and port A2 is not connected to either port B2 or C2.

[0076] In other embodiments, the heating control valve 4 may also employ other methods, such as including a first heating switch valve and a second heating switch valve. The first heating switch valve is located in the water supply pipeline 100, and the second heating switch valve is located in the bypass pipeline 300. One end of the bypass pipeline 300 is connected to the water supply pipeline 100 between the first heating switch valve and the inlet of the terminal water device 2. For ease of control, both the first and second heating switch valves are solenoid valves.

[0077] In some embodiments, the heat pump system further includes a temperature detection unit for detecting the water temperature inside the inner tank 110. Exemplarily, the temperature detection unit includes a temperature sensor electrically connected to the controller.

[0078] When the heat pump system operates in the first summer working mode, if the water temperature inside the inner tank 110 reaches the user-set target temperature, the heat pump device 10 will stop working to prevent the temperature inside the inner tank 110 from becoming too high. Therefore, when the heat pump system operates in the second summer working mode, the terminal water device 2 can only provide cooling for a limited time.

[0079] When the heat pump system operates in the first summer working mode, it cannot meet the user's demand for long-term cooling of the terminal water device 2. In view of this, in some embodiments, the heat pump system also includes a second heat exchange unit 107 and a heat exchange device 112. The second heat exchange unit 107 is located inside the inner tank 110; the heat exchange device 112 is located outside the inner tank 110. The heat exchange device 112 and the second heat exchange unit 107 are connected to form a second heat exchange circulation loop. A third circulation pump 113 is provided on the second heat exchange circulation loop.

[0080] like Figure 7 As shown, the heat pump system also includes a second summer working mode. During the operation of the first summer working mode, if the water temperature inside the inner tank 110 reaches the preset temperature, the third circulation pump 113 is controlled to switch the heat pump system from the first summer working mode to the second summer working mode. The second heat exchange unit 107 absorbs the heat energy in the inner tank 110 and sends it to the heat exchange device 112 outside the inner tank 110. The heat exchange device 112 cools the water, thereby transferring the excess heat energy out of the inner tank 110. This prevents the water temperature inside the inner tank 110 from exceeding the preset temperature, which is beneficial for the long-term operation of the heat pump device 10 and enables the terminal water device 2 to achieve all-day cooling.

[0081] For example, the heat exchange device 112 is a cooling tower, the outlet of the cooling tower is connected to the heat exchange return water pipeline and the inlet of the second heat exchange unit 107, and the third circulation pump 113 is provided on the heat exchange return water pipeline.

[0082] In other embodiments, the heat exchange device 112 may also employ an existing air heat exchange structure, such as a structure in which heat exchange fins and a cooling fan are combined.

[0083] In some embodiments, the heat pump system further includes a housing 111, within which the heat pump assembly and the inner tank 110 are disposed. The housing 111 protects the heat pump assembly and the inner tank 110 from exposure.

[0084] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat pump assembly also includes a four-way reversing valve 105. The four-way reversing valve 105 has heating and cooling states. When the four-way reversing valve 105 is in heating state, the heating cycle loop is connected. When the four-way reversing valve 105 is in cooling state, the compressor 101, the second heat exchanger 104, the throttling structure 103, and the first heat exchanger 102 are sequentially connected to form a cooling cycle loop. It should be noted that the structure of the four-way reversing valve 105 and how it controls the switching between heating and cooling states are existing technologies in the art and will not be described in detail here.

[0085] like Figure 8 As shown, the heat pump system also includes a fourth winter working mode. When the terminal water device 2 has heating needs in winter and the user does not need hot water and the heat source device 1 is not working, if the heating demand is small, the heat pump system can be switched to the fourth winter working mode. The heating control valve 4 is controlled to connect the water supply pipeline 100 with the bypass pipeline 300, so that the first heat exchange circulation loop formed by the terminal water device 2 and the first heat exchange channel is connected end to end. The heat pump device 10 is working and the four-way reversing valve 105 is in the heating state. The first circulation pump 3 and the second circulation pump 108 are both working. The heat pump three-way valve is controlled to connect port A1 and port C1, and port B1 is not connected to either port A1 or port C1. Part of the return water from the terminal water device 2 is pumped by the second circulation pump 108 to the first heat exchange channel of the first heat exchanger 102 and heated. After being mixed with another part of the return water from the terminal water device 2, it is sent back to the terminal water device 2 by the first circulation pump 3, which plays the role of heating the room. Simultaneously, the heat pump device 10 is controlled to work, the four-way heat exchange valve is switched to the cooling state, the second heat exchanger 104 absorbs the heat energy in the inner tank 110, so that the water in the inner tank 110 is lower than the ambient temperature, and the third circulation pump 113 is controlled to work, using the heat exchange device 112 to absorb the heat energy in the air and send it through the second heat exchange unit 107 to the inner tank 110, so as to maintain the water temperature in the inner tank 110.

[0086] It should be noted that users can also select any of the following operating modes for the heat pump system via the control panel: First Winter Operating Mode, Second Winter Operating Mode, Third Winter Operating Mode, Fourth Winter Operating Mode, First Summer Operating Mode, and Second Summer Operating Mode. Except for the Fourth Winter Operating Mode, the four-way reversing valve 105 is in cooling mode; in all other operating modes, the four-way reversing valve 105 is in heating mode.

[0087] The heat pump system provided by this utility model combines a heat pump device 10, a terminal water device 2, a heat source device 1, and a heat exchange device 112, and switches between different modes using various valves. This enables the terminal water device 2 to have both heating and cooling functions for winter and summer, thus avoiding the limitation that the heat pump device 10 can only be used for heating, as well as the limitation that the heat source device 1 can only be used for heating when it is a heating furnace, thereby reducing costs.

[0088] In some embodiments, such as Figure 1 and Figure 2 As shown, the inner tank 110 is connected to a cold water connector and a hot water connector. The cold water connector extends out of the outer shell 111 and is used to connect to a water source, while the hot water connector extends out of the outer shell 111 and is used to connect to water-using equipment, such as a shower head or faucet.

[0089] In some embodiments, the first heat exchanger 102 is a fluorine-water heat exchanger, and the second heat exchanger 104 is a microchannel heat exchanger wound around the outer wall of the inner liner 110, thereby improving the heat exchange efficiency of the first heat exchanger 102 and the second heat exchanger 104. It should be noted that both fluorine-water heat exchangers and microchannel heat exchangers are commonly used heat exchangers in the art, and will not be described in detail here.

[0090] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0091] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat pump system, characterized by, The application relates to a heating system, which comprises a heat source device (1) and a terminal water device (2), a water outlet of the heat source device (1) is communicated with a water inlet of the terminal water device (2), a water outlet of the terminal water device (2) is communicated with a water return inlet of the heat source device (1) through a water return pipeline (200), and the heat source device (1) and the terminal water device (2) are communicated in series to form a heating circulation loop. The heat pump device (10) comprises an inner container (110), a first heat exchange unit (106) arranged in the inner container (110), a heat pump assembly and a control valve group (109) which are both arranged outside the inner container (110), the heat pump assembly comprises a compressor (101), a first heat exchanger (102), a throttling structure (103) and a second heat exchanger (104), the first heat exchanger (102) has a first heat exchange channel and a second heat exchange channel, the compressor (101), the second heat exchange channel, the throttling structure (103) and the second heat exchanger (104) are sequentially and communicatively connected in series to form a heating circulation loop, and the second heat exchanger (104) is used for heating water in the inner container (110); the control valve group (109) can selectively connect any one of the first heat exchange unit (106) and the first heat exchange channel to the water return pipeline (200). The water return pipeline (200) has a first communication point and a second communication point, a one-way valve (5) is arranged on the water return pipeline (200), the one-way valve (5) is arranged between the first communication point and the second communication point, and the one-way valve (5) only allows water flow in the water return pipeline (200) to flow from the first communication point to the second communication point.

2. The heat pump system of claim 1, wherein, The first communication point is selectively communicated with any one of an inlet of the first heat exchange unit (106) and an inlet of the first heat exchange channel; and outlets of the first heat exchange unit (106) and the first heat exchange channel are both communicated with the second communication point. The control valve group (109) comprises a heat pump three-way valve, an inlet of the heat pump three-way valve is communicated with the first communication point, a first outlet of the heat pump three-way valve is communicated with the inlet of the first heat exchange unit (106), a second outlet of the heat pump three-way valve is communicated with the inlet of the first heat exchange channel, and the inlet of the heat pump three-way valve is selectively communicated with the first outlet of the heat pump three-way valve or the second outlet of the heat pump three-way valve.

3. The heat pump system of claim 2, wherein, Alternatively, the control valve group (109) comprises: A first switch valve, the inlet of the first heat exchange unit (106) is communicated with the first communication point through the first switch valve; A second switch valve, the inlet of the first heat exchange channel is communicated with the first communication point through the second switch valve. An inlet of the control valve group (109) is communicated with the first communication point through a first heat exchange pipeline (400), and the first heat exchange pipeline (400) is selectively communicated with the inlet of the first heat exchange channel or the inlet of the first heat exchange unit (106) through the control valve group (109).

4. The heat pump system of claim 2, wherein, ​ The outlet of the first heat exchange channel and the outlet of the first heat exchange unit (106) are connected to the second communication point through a second heat exchange pipeline (500) after being merged; A second circulating pump (108) is arranged on the first heat exchange pipeline (400) or the second heat exchange pipeline (500).

5. The heat pump system according to any one of claims 2 to 4, characterized in that, The water outlet of the heat source device (1) is communicated with the water inlet of the terminal water device (2) through a water supply pipeline (100), and the heat pump system further comprises a bypass pipeline (300) and a heating control valve (4), the bypass pipeline (300) is connected in parallel between the water supply pipeline (100) and the water return pipeline (200) of the terminal water device (2); The heating control valve (4) can control the bypass pipeline (300) to be selectively disconnected from the water supply pipeline (100) and make the heating circulation loop conductive, or be communicated with the water supply pipeline (100) to make the first heat exchange circulation loop formed by the terminal water device (2) and the first heat exchange channel conductive.

6. The heat pump system of claim 5, wherein, The heat pump system further comprises a first circulating pump (3); The first circulating pump (3) is arranged on the water supply pipeline (100), and one end of the bypass pipeline (300) is communicated between the water inlet of the terminal water device (2) and the water outlet of the heat source device (1); or, the first circulating pump (3) is arranged on the water return pipeline (200), and the first circulating pump (3) is located between the water outlet of the terminal water device (2) and the first communication point.

7. The heat pump system of claim 5, wherein, The heating control valve (4) comprises: A heating three-way valve, a first inlet of the heating three-way valve being communicated with the bypass pipeline (300), a second inlet of the heating three-way valve and an outlet of the heating three-way valve being connected in series to the water supply pipeline (100); Or, the heating control valve (4) comprises: A first heating on-off valve, the first heating on-off valve being arranged on the water supply pipeline (100); A second heating on-off valve, the second heating on-off valve being arranged on the bypass pipeline (300), one end of the bypass pipeline (300) being communicated to the water supply pipeline (100) between the first heating on-off valve and the water inlet of the terminal water device (2).

8. The heat pump system according to any one of claims 1 to 4, characterized in that, The heat source device (1) is an air source heat pump, or a gas water heater, or a boiler.

9. The heat pump system according to any one of claims 1 to 4, characterized in that, The heat pump device (10) further comprises: A second heat exchange unit (107) located in the inner container (110); A heat exchange device (112) located outside the inner container (110), the heat exchange device (112) and the second heat exchange unit (107) being connected to form a second heat exchange circulation loop, and a third circulating pump (113) being arranged on the second heat exchange circulation loop.

10. The heat pump system of claim 9, wherein, The heat exchange device (112) is a cooling tower or an air heat exchange structure.

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