Heat recovery heat pump system

Abstract

The utility model provides a heat recovery heat pump system, a four-way valve is respectively connected with a compressor, a plate heat exchanger and a first electromagnetic valve, the plate heat exchanger is respectively connected with a heating tail end and a living water tank through a second electromagnetic valve, and a heat recovery heat exchanger is respectively connected with the plate heat exchanger, the living water tank and the first electromagnetic valve. When the heat recovery heat pump system operates according to the refrigeration mode in a heat recovery mode, the first electromagnetic valve is controlled, and the refrigerant path is switched to the heat recovery heat exchanger, so that waste heat exchanges heat between the heat recovery heat exchanger and the domestic water tank, waste heat recovery is achieved, and the heat utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat recovery heat pump system. Background Art

[0002] As an efficient energy-saving device that makes full use of low-grade heat energy, a heat pump has the functions of air conditioning (including refrigeration function and heating function) and hot water production in practical applications, meeting the user's hot water production demand and air conditioning demand. However, when a conventional heat pump system operates in refrigeration or heating mode, the waste heat generated by the heat pump main unit (or the outdoor unit of the heat pump) is directly discharged. For example, the hot air blown out during refrigeration is directly discharged, which not only causes waste of the heat in the hot air but also causes environmental pollution. Therefore, how to recover the waste heat of the heat pump system is an urgent problem to be solved. Summary of the Utility Model

[0003] In view of this, the purpose of the present utility model is to provide a heat recovery heat pump system to alleviate the above problems.

[0004] In a first aspect, an embodiment of the present utility model provides a heat recovery heat pump system, which includes: a compressor, a four-way valve, a plate heat exchanger, a heating terminal, a domestic water tank, a heat recovery heat exchanger, a first solenoid valve, and a second solenoid valve; wherein, the four-way valve is respectively connected to the compressor, the plate heat exchanger, and the first solenoid valve, the plate heat exchanger is further respectively connected to the heating terminal and the domestic water tank through the second solenoid valve, and the heat recovery heat exchanger is respectively connected to the plate heat exchanger, the domestic water tank, and the first solenoid valve.

[0005] For the above heat recovery heat pump system, when operating in the refrigeration mode with heat recovery, control the first solenoid valve to switch the refrigerant path to the heat recovery heat exchanger, so that the waste heat exchanges heat with the domestic water tank in the heat recovery heat exchanger, realizing waste heat recovery and improving the heat utilization rate.

[0006] Preferably, the above system further includes a solar collector panel; wherein, the solar collector panel is connected between the heat recovery heat exchanger and the domestic water tank.

[0007] Preferably, the above system further includes a first water pump; wherein, one end of the first water pump is connected to the heat recovery heat exchanger, and the other end is respectively connected to the solar collector panel and the domestic water tank.

[0008] Preferably, the above system further includes a fin heat exchanger; wherein, the first end of the first solenoid valve is connected to the heat recovery heat exchanger, the second end is connected to the fin heat exchanger, and the third end is connected to the four-way valve.

[0009] Preferably, the above system further includes a throttle valve; wherein, one end of the throttle valve is connected to the plate heat exchanger, and the other end is respectively connected to the fin heat exchanger and the heat recovery heat exchanger.

[0010] Preferably, the first end of the second solenoid valve is connected to the plate heat exchanger, the second end is connected to the heating terminal, and the third end is connected to the domestic water tank.

[0011] Preferably, the above system further includes a second water pump; wherein, one end of the second water pump is connected to the plate heat exchanger, and the other end is connected to the first end of the second solenoid valve.

[0012] Preferably, the heating terminal includes at least one of the following: fan coil unit, radiator group and floor heating coil.

[0013] Preferably, the above system further includes a first temperature detection device; wherein, the first temperature detection device is arranged in the domestic water tank for detecting the temperature of the domestic water tank.

[0014] Preferably, the above system further includes a second temperature detection device; wherein, the second temperature detection device is arranged on the solar collector for detecting the temperature of the solar collector.

[0015] In a second aspect, an embodiment of the present invention further provides a control method for a heat recovery heat pump system, which is applied to the heat recovery heat pump system in the first aspect. The method includes:

[0016] When the heat recovery heat pump system operates according to the user-set mode, temperature parameters are acquired; wherein, the user-set mode includes a heating mode and a cooling mode, and the temperature parameters include: a first temperature corresponding to the domestic water tank and a second temperature corresponding to the solar collector.

[0017] According to the temperature parameters and the preset temperature threshold, the first solenoid valve is controlled so that the heat recovery heat pump system operates in a heat recovery manner according to the user-set mode.

[0018] Preferably, the preset temperature threshold includes a first temperature threshold; when the user-set mode is the heating mode, the step of controlling the first solenoid valve according to the temperature parameters and the preset temperature threshold includes: if the second temperature is greater than the first temperature threshold, controlling the first end and the third end of the first solenoid valve to be connected so that the heat recovery heat pump system operates in a heat recovery manner in the heating mode.

[0019] Preferably, the preset temperature threshold includes a second temperature threshold; when the user-set mode is the cooling mode, the step of controlling the first solenoid valve according to the temperature parameters and the preset temperature threshold includes: if the first temperature is less than the second temperature threshold, controlling the first end and the third end of the first solenoid valve to be connected so that the heat recovery heat pump system operates in a heat recovery manner in the cooling mode.

[0020] The embodiments of the present invention bring the following beneficial effects:

[0021] The embodiment of the present utility model provides a heat recovery heat pump system. When the heat recovery heat pump system operates in the heat recovery mode in the refrigeration mode, the first solenoid valve is controlled to switch the refrigerant path to the heat recovery heat exchanger, so that the waste heat is exchanged in the heat recovery heat exchanger and the domestic water tank, realizing waste heat recovery and improving the heat utilization rate.

[0022] Other features and advantages of the present utility model will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0023] To make the above objectives, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a refrigerant schematic diagram when a heat recovery heat pump system provided by an embodiment of the present utility model operates in the heat recovery mode in the refrigeration mode;

[0026] Figure 2 It is a refrigerant schematic diagram when a heat recovery heat pump system provided by an embodiment of the present utility model operates normally in the refrigeration mode;

[0027] Figure 3 It is a refrigerant schematic diagram when a heat recovery heat pump system provided by an embodiment of the present utility model operates in the heat recovery mode in the heating mode;

[0028] Figure 4 It is a refrigerant schematic diagram when a heat recovery heat pump system provided by an embodiment of the present utility model operates normally in the heating mode;

[0029] Figure 5 It is a refrigerant schematic diagram when a heat recovery heat pump system provided by an embodiment of the present utility model operates normally in the hot water heating mode;

[0030] Figure 6 It is a control method flow chart of a heat recovery heat pump system provided by an embodiment of the present utility model. Detailed Embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0032] For ease of understanding of this embodiment, the embodiments of the present utility model will be introduced in detail below.

[0033] Embodiment 1

[0034] The embodiment of the present utility model provides a heat recovery heat pump system, as Figure 1 shown. The system includes: a compressor 11, a four-way valve 12, a plate heat exchanger 13, a heating terminal 14, a domestic water tank 15, a heat recovery heat exchanger 16, a first solenoid valve SV1, and a second solenoid valve SV2. Among them, the four-way valve 12 is respectively connected to the compressor 11, the plate heat exchanger 13, and the first solenoid valve SV1. The plate heat exchanger 13 is also respectively connected to the heating terminal 14 and the domestic water tank 15 via the second solenoid valve SV2. The heat recovery heat exchanger 16 is respectively connected to the plate heat exchanger 13, the domestic water tank 15, and the first solenoid valve SV1. It should be noted that in actual applications, the heating terminal 14 includes at least one of the following: fan coil units, radiator groups, and floor heating coils, etc., and can be specifically set according to actual situations.

[0035] Furthermore, the above system further includes a fin heat exchanger 17. Among them, the first end (i.e., end A) of the first solenoid valve SV1 is connected to the heat recovery heat exchanger 16, the second end (i.e., end B) is connected to the fin heat exchanger 17, and the third end (i.e., end C) is connected to the four-way valve 12. In addition, the above system further includes a throttle valve 18. Among them, one end of the throttle valve 18 is connected to the plate heat exchanger 13, and the other end is respectively connected to the fin heat exchanger 17 and the heat recovery heat exchanger 16.

[0036] In addition, the above system further includes a solar collector 19 and a first water pump P1. Among them, the solar collector 19 is connected between the heat recovery heat exchanger 16 and the domestic water tank 15. One end of the first water pump P1 is connected to the heat recovery heat exchanger 16, and the other end is respectively connected to the solar collector 19 and the domestic water tank 15. In actual applications, the heat generated by the solar collector 19 can be used to meet the domestic hot water demand of users.

[0037] Moreover, the first end (i.e., the A end) of the second solenoid valve SV2 is connected to the plate heat exchanger 13, the second end (i.e., the B end) is connected to the heating terminal 14, and the third end (i.e., the C end) is connected to the domestic water tank 15. In addition, the system further includes a second water pump P2; wherein, one end of the second water pump P2 is connected to the plate heat exchanger 13, and the other end is connected to the first end (i.e., the A end) of the second solenoid valve SV2.

[0038] In practical applications, by controlling the connection between the first end and the second end of the second solenoid valve SV2, heat exchange between the heating terminal 14 and the plate heat exchanger 13 can be achieved. After heat exchange, the heating terminal 14 can heat or cool the external environment to meet the user's heating or cooling requirements. By controlling the connection between the first end and the third end of the second solenoid valve SV2, heat exchange between the domestic water tank 15 and the plate heat exchanger 13 can be achieved, meeting the user's hot water production requirement. Therefore, by controlling the second solenoid valve SV2, the user's heating, cooling, and hot water production requirements can be achieved.

[0039] Optionally, the above system further includes a first temperature detection device and a second temperature detection device; wherein, the first temperature detection device is arranged in the domestic water tank 15 for detecting the temperature T1 of the domestic water tank 15. The second temperature detection device is arranged on the solar collector 19 for detecting the temperature T2 of the solar collector. In practical applications, the first temperature detection device and the second temperature detection device can use temperature sensors or thermosensitive packages. In addition, the second temperature detection device can also be arranged at the output end of the solar collector 19, which can be specifically set according to actual situations.

[0040] For the above heat recovery heat pump system, when operating in the heat recovery mode in the cooling mode, as Figure 1 shown, control the connection between the first end and the third end of the first solenoid valve SV1, that is, the A end and the C end are connected. At this time, the refrigerant operation path is as follows: compressor 11 → four-way valve 12 → first solenoid valve SV1 → heat recovery heat exchanger 16 → throttle valve 18 → plate heat exchanger 13 → four-way valve 12 → compressor 11; In addition, for the water side, the second water pump P2 operates, and the first end and the second end of the second solenoid valve SV2 are connected, that is, the A end and the B end are connected, and the heating terminal 14 exchanges heat with the plate heat exchanger 13 to achieve a cooling effect. At the same time, the first water pump P1 operates, and the domestic water tank 15 exchanges heat with the heat recovery heat exchanger 16 to heat the water in the domestic water tank 15 using the waste heat generated in the cooling mode to achieve a hot water production effect.

[0041] In addition, when the heat recovery heat pump system operates normally in the cooling mode, as Figure 2As shown, the second end and the third end of the first solenoid valve SV1 are connected, that is, the B end and the C end are connected. At this time, the refrigerant operation path is as follows: compressor 11 → four-way valve 12 → first solenoid valve SV1 → fin heat exchanger 17 → throttle valve 18 → plate heat exchanger 13 → four-way valve 12 → compressor 11; In addition, for the water side, the second water pump P2 operates, and the first end and the second end of the second solenoid valve SV2 are connected, that is, the A end and the B end are connected. The heating terminal 14 exchanges heat with the plate heat exchanger 13 to achieve the refrigeration effect.

[0042] Therefore, compared with the normal operation of the refrigeration mode, the above heat recovery heat pump system controls the first solenoid valve SV1 to switch the refrigerant path from the fin heat exchanger 17 to the heat recovery heat exchanger 16, so that the waste heat exchanges heat with the domestic water tank 15 in the heat recovery heat exchanger 16, realizing waste heat recovery, that is, converting the low-grade waste heat generated by refrigeration into the high-grade heat required for domestic hot water, reducing the system power consumption, improving the heat utilization rate, not only improving the refrigeration effect, but also ensuring the domestic hot water demand of users.

[0043] Similarly, for the above heat recovery heat pump system, when operating in the heat recovery mode in the heating mode, as Figure 3 shown, control the first end and the third end of the first solenoid valve SV1 to be connected, that is, the A end and the C end are connected. At this time, the refrigerant operation path is as follows: compressor 11 → four-way valve 12 → plate heat exchanger 13 → throttle valve 18 → heat recovery heat exchanger 16 → first solenoid valve SV1 → four-way valve 12 → compressor 11; In addition, for the water side, the second water pump P2 operates, and the first end and the second end of the second solenoid valve SV2 are connected, that is, the A end and the B end are connected. The heating terminal 14 exchanges heat with the plate heat exchanger 13 to achieve the heating effect.

[0044] At the same time, the first water pump P1 operates, and the solar collector 19 heats the water in the domestic water tank 15, and the domestic water tank 15 exchanges heat with the heat recovery heat exchanger 16. Therefore, for the case of severe attenuation of the heating capacity in the low-temperature environment in winter, it not only realizes the domestic hot water production effect, but also maximally utilizes the heat generated by the solar collector 19, ensuring the heating effect and domestic hot water production effect required by users. At the same time, it also reduces the power consumption of the heat recovery heat pump system, achieving energy conservation and environmental protection.

[0045] In addition, when the heat recovery heat pump system operates normally in the heating mode, as Figure 4As shown in the figure, the second end and the third end of the first solenoid valve SV1 are connected, that is, the B end and the C end are connected. At this time, the refrigerant operation path is as follows: compressor 11 → four-way valve 12 → plate heat exchanger 13 → throttle valve 18 → fin heat exchanger 17 → first solenoid valve SV1 → four-way valve 12 → compressor 11; in addition, for the water side, the second water pump P2 operates, and the first end and the second end of the second solenoid valve SV2 are connected, that is, the A end and the B end are connected. The heating terminal 14 exchanges heat with the plate heat exchanger 13 to achieve the heating effect.

[0046] Therefore, compared with the normal operation of the heating mode, the above heat recovery heat pump system controls the first solenoid valve SV1 to switch the refrigerant path from the fin heat exchanger 17 to the heat recovery heat exchanger 16, so as to maximize the utilization of the energy generated by the solar collector 19, reduce the power consumption of the system, and achieve energy conservation and environmental protection.

[0047] Furthermore, for the above heat recovery heat pump system, when operating in the hot water heating mode, as Figure 5 shown, the second end and the third end of the first solenoid valve SV1 are connected, that is, the B end and the C end are connected. At this time, the refrigerant operation path is as follows: compressor 11 → four-way valve 12 → plate heat exchanger 13 → throttle valve 18 → fin heat exchanger 17 → first solenoid valve SV1 → four-way valve 12 → compressor 11; in addition, for the water side, the second water pump P2 operates, and the first end and the third end of the second solenoid valve SV2 are connected, that is, the A end and the C end are connected. The domestic water tank 15 exchanges heat with the plate heat exchanger 13 to achieve the hot water heating effect.

[0048] In summary, the heat recovery heat pump system provided by the embodiment of the present invention not only recovers the waste heat generated during the refrigeration operation and exchanges heat with the domestic water tank to improve the energy utilization rate, but also maximally utilizes the heat generated by the solar collector in the case of severe attenuation of the heating capacity in the low-temperature environment in winter, ensuring the heating effect and the hot water heating effect required by users, reducing the power consumption of the heat recovery heat pump system, and achieving energy conservation and environmental protection.

[0049] Embodiment 2

[0050] Based on the above heat recovery heat pump system, the embodiment of the present invention further provides a control method for the heat recovery heat pump system, as Figure 6 shown, the method includes the following steps:

[0051] Step S602, when the heat recovery heat pump system operates according to the user-set mode, obtain the temperature parameter;

[0052] Among them, the user-set modes include the heating mode and the cooling mode, and the temperature parameters include: the first temperature T1 corresponding to the domestic water tank and the second temperature T2 corresponding to the solar collector panel; in practical applications, the controller of the heat recovery heat pump system can obtain the temperature parameters in real time or at preset intervals; and, when the heat recovery heat pump system operates in the cooling mode, in order to utilize the waste heat generated by cooling to exchange heat with the domestic water tank, it is necessary to obtain the first temperature T1; when the heat recovery heat pump system operates in the heating mode, in order to make the most of the heat generated by the solar collector panel, it is necessary to obtain the second temperature T2.

[0053] Step S604, control the first solenoid valve according to the temperature parameters and the preset temperature threshold, so that the heat recovery heat pump system operates in heat recovery according to the user-set mode.

[0054] Specifically, the control processes of the first solenoid valve in the cooling mode and the heating mode are described as follows:

[0055] (1) When operating in the cooling mode, the preset temperature thresholds include the second temperature threshold X2 and the fourth temperature threshold X4; among them, the second temperature threshold X2 is preferably 30°C, and the fourth temperature threshold X4 is preferably 45°C. Specifically, the values of X2 and X4 can be adjusted adaptively according to the actual situation.

[0056] ① If the first temperature is less than the second temperature threshold, that is, when T1 < X2, control the first end and the third end of the first solenoid valve to be connected, that is, the A end and the C end are connected, so that the heat recovery heat pump system operates in heat recovery according to the cooling mode. At this time, the refrigerant path switches from the fin heat exchanger to the heat recovery heat exchanger, and control the first water pump to operate, so that the waste heat exchanges heat between the heat recovery heat exchanger and the domestic water tank, realizing waste heat recovery, reducing the system power consumption, and improving the heat utilization rate. Specifically, reference can be made to the foregoing embodiments, and the embodiments of the present invention will not be elaborated in detail herein.

[0057] ② If the first temperature is greater than the fourth temperature threshold, that is, when T1 > X4, at this time, control the second end and the third end of the first solenoid valve to be connected, that is, the B end and the C end are connected, and the refrigerant exchanges heat through the fin heat exchanger, and the heat recovery heat pump system operates in the normal cooling mode.

[0058] ③ When X2 ≤ T1 ≤ X4, the state of the first solenoid valve maintains the previous state, that is, maintains the state when entering ③. For example, if the previous state is that the A end and the C end are connected, at this time, the A end and the C end in the first solenoid valve are still connected; or, if the previous state is that the B end and the C end are connected, at this time, the B end and the C end in the first solenoid valve are still connected, and control the heat recovery heat pump system to operate according to the corresponding mode. The embodiments of the present invention will not be elaborated in detail herein.

[0059] (2) When operating in the heating mode, the preset temperature thresholds include a first temperature threshold X1 and a third temperature threshold X3; among them, the first temperature threshold X1 is preferably 25 °C, and the third temperature threshold X3 is preferably 5 °C. Specifically, the values of X1 and X3 can be adaptively adjusted according to the actual situation.

[0060] ① If the second temperature is greater than the first temperature threshold, that is, when T2 > X1, control the first end and the third end of the first solenoid valve to be connected, that is, the A end and the C end are connected, so that the heat recovery heat pump system operates in the heat recovery mode in the heating mode. At this time, the refrigerant path is switched from the fin heat exchanger to the heat recovery heat exchanger, and control the first water pump to operate to maximize the use of the energy generated by the solar collector panel, reduce the power consumption of the system, and achieve energy conservation and environmental protection. Specifically, reference can be made to the foregoing embodiments, and the embodiments of the present invention will not be elaborated in detail herein.

[0061] ② If the second temperature is less than the third temperature threshold, that is, when T2 < X3, at this time, the temperature of the solar collector panel is relatively low, and the heat generated by it cannot be utilized. Therefore, control the second end and the third end of the first solenoid valve to be connected, that is, the B end and the C end are connected, and the refrigerant exchanges heat through the fin heat exchanger, and the heat recovery heat pump system operates in the normal heating mode.

[0062] ③ When X3 ≤ T2 ≤ X1, the state of the first solenoid valve maintains the previous state, that is, maintains the state when entering ③. For example, if the previous state is that the A end and the C end are connected, at this time, the A end and the C end in the first solenoid valve are still connected; or, if the previous state is that the B end and the C end are connected, at this time, the B end and the C end in the first solenoid valve are still connected, and control the heat recovery heat pump system to operate according to the corresponding mode. The embodiments of the present invention will not be elaborated in detail herein.

[0063] The control method of the heat recovery heat pump system provided by the embodiments of the present invention controls the first solenoid valve according to the temperature parameters. On the one hand, it can utilize waste heat to exchange heat with the domestic water tank during the refrigeration operation, improving the energy utilization rate; on the other hand, during the heating operation, it maximally utilizes the heat generated by the solar collector panel, ensuring the heating effect and hot water production effect required by users, reducing the power consumption of the heat recovery heat pump system, and achieving energy conservation and environmental protection.

[0064] The control method of the heat recovery heat pump system provided by the embodiments of the present invention has the same technical features as the heat recovery heat pump system provided by the above embodiments, so it can also solve the same technical problems and achieve the same technical effects.

[0065] The embodiments of the present invention further provide a controller, including a processor and a memory. The memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement the control method of the above heat recovery heat pump system.

[0066] This embodiment also provides a machine-readable storage medium storing machine-executable instructions, which, when called and executed by a processor, cause the processor to implement the control method of the above heat recovery heat pump system.

[0067] A computer program product of the heat recovery heat pump system and its control method provided by the embodiments of the present invention includes a computer-readable storage medium storing program codes. The instructions included in the program codes can be used to execute the methods described in the foregoing method embodiments. For specific implementation, reference can be made to the method embodiments, which will not be elaborated herein.

[0068] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the above-described systems and devices can refer to the corresponding processes in the foregoing method embodiments, which will not be elaborated herein.

[0069] In addition, in the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0070] If the above functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs.

[0071] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0072] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present utility model, which are used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions described in the foregoing embodiments or can easily conceive of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the protection scope of the claims.

Claims

1. A heat recovery heat pump system, characterized in that: The system comprises: a compressor, a four-way valve, a plate heat exchanger, a heating terminal, a domestic water tank, a heat recovery heat exchanger, a first solenoid valve and a second solenoid valve; Among them, the four-way valve is respectively connected to the compressor, the plate heat exchanger and the first solenoid valve, the plate heat exchanger is also respectively connected to the heating terminal and the domestic water tank via the second solenoid valve, and the heat recovery heat exchanger is respectively connected to the plate heat exchanger, the domestic water tank and the first solenoid valve.

2. The heat recovery heat pump system according to claim 1, characterized in that: The system further comprises a solar thermal collector panel, wherein the solar thermal collector panel is connected between the heat recovery heat exchanger and the domestic water tank.

3. The heat recovery heat pump system according to claim 2, characterized in that: The system further comprises a first water pump; wherein one end of the first water pump is connected to the heat recovery heat exchanger, and the other end of the first water pump is respectively connected to the solar thermal collector panel and the domestic water tank.

4. The heat recovery heat pump system according to claim 1, characterized in that: The system further comprises a fin heat exchanger; wherein the first end of the first solenoid valve is connected to the heat recovery heat exchanger, the second end is connected to the fin heat exchanger, and the third end is connected to the four-way valve.

5. The heat recovery heat pump system according to claim 4, characterized in that: The system further comprises a throttle valve, wherein one end of the throttle valve is connected to the plate heat exchanger, and the other end of the throttle valve is respectively connected to the fin heat exchanger and the heat recovery heat exchanger.

6. The heat recovery heat pump system according to claim 1, characterized in that: The first end of the second solenoid valve is connected to the plate heat exchanger, the second end is connected to the heating terminal, and the third end is connected to the domestic water tank.

7. The heat recovery heat pump system according to claim 6, characterized in that: The system further comprises a second water pump; wherein one end of the second water pump is connected to the plate heat exchanger, and the other end of the second water pump is connected to the first end of the second solenoid valve.

8. The heat recovery heat pump system according to claim 1, characterized in that: The heating terminal includes at least one of the following: a fan coil, a radiator group and a floor heating coil.

9. The heat recovery heat pump system according to claim 1, characterized in that: The system further comprises a first temperature detection device; wherein the first temperature detection device is arranged in the domestic water tank and is used to detect the temperature of the domestic water tank.

10. The heat recovery heat pump system according to claim 2, characterized in that: The system further comprises a second temperature detection device, wherein the second temperature detection device is arranged on the solar thermal collector plate and is used to detect the temperature of the solar thermal collector plate.

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