Multi-heat-source heat pump system

Abstract

The utility model provides a multi-heat-source heat pump system which comprises a compressor and a first heat exchanger, the compressor is connected with the first heat exchanger, and the first heat exchanger is used for exchanging heat with outdoor air; the solar circulation loop is used for absorbing heat of the sun; the solar circulation loop is in heat exchange connection with the storage circulation loop; the storage circulation loop is used for storing the heat subjected to heat exchange with the solar circulation loop in the stratum or releasing the heat; the first end of the first heat exchange branch is connected with the compressor, and the second end of the first heat exchange branch is connected with one end of the first heat exchanger in an on-off mode; the first heat exchange branch is in heat exchange connection with the storage circulation loop. The multi-heat-source heat pump system can effectively solve the technical problem that an air source heat pump system in the prior art is prone to frosting during heating in winter.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump technical field, concretely relates to a kind of multi-heat source type heat pump system. BACKGROUND

[0002] Under the double impetus of demand driving and policy support, the application range of heat pump technology in China is continuously expanding, and the formulation of double carbon target injects strong impetus for its development. At present, from the economic and environmental protection point of view, the development of air source heat pump system is increasingly valued.

[0003] In heating mode, the condenser of air source heat pump system is converted into evaporator, thereby absorbing outdoor heat and reducing refrigerant temperature. However, in cold regions, air source heat pump system has certain limitations. Due to the low outdoor temperature in winter, the condenser is prone to frost formation when absorbing outdoor air heat, which will affect the working efficiency of heat pump system and cause unstable operation.

[0004] Therefore, the prior art still needs further development. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above technical deficiencies, and provides a kind of multi-heat source type heat pump system to solve the technical problems that air source heat pump system of prior art is prone to frost formation when heating in winter.

[0006] To achieve the above technical purpose, according to one aspect of the utility model: a kind of multi-heat source type heat pump system is provided, comprising: compressor and first heat exchanger, compressor is connected with first heat exchanger, and first heat exchanger is used to exchange heat with outdoor air;Solar circulation loop and storage circulation loop, solar circulation loop is used to absorb the heat of sun;Solar circulation loop and storage circulation loop are heat exchange connected;Storage circulation loop is used to store heat in stratum or release heat after heat exchange with solar circulation loop;First heat exchange branch, the first end of first heat exchange branch is connected with compressor, and the second end of first heat exchange branch is connected with one end of first heat exchanger in the form of on-off;First heat exchange branch and storage circulation loop are heat exchange connected;When heat pump system is heating mode, and outdoor temperature is less than first preset temperature value, solar radiation value is less than first preset radiation value, the second end of first heat exchange branch is connected with one end of first heat exchanger, storage circulation loop releases heat, and storage circulation loop exchanges heat with refrigerant in first heat exchange branch, so that refrigerant in first heat exchange branch absorbs the heat released by storage circulation loop;After absorbing heat, the refrigerant in first heat exchange branch flows to first heat exchanger through the second end of first heat exchange branch.

[0007] Further, the heat pump system further comprises: an enthalpy increasing branch connected with the exhaust port of the compressor and the medium pressure cavity of the compressor; the second end of the first heat exchange branch is connected with the enthalpy increasing branch in an on-off manner; when the heat pump system is in the heating mode, the outdoor temperature is greater than or equal to a first preset temperature value and less than a second preset temperature value, and the solar radiation value is greater than or equal to a first preset radiation value and less than a second preset radiation value, the second end of the first heat exchange branch is disconnected from the one end of the first heat exchanger, the second end of the first heat exchange branch is connected with the enthalpy increasing branch, the storage circulation loop releases heat, and the storage circulation loop exchanges heat with the refrigerant in the first heat exchange branch, so that the refrigerant in the first heat exchange branch absorbs the heat released by the storage circulation loop; the refrigerant in the first heat exchange branch after absorbing heat flows to the enthalpy increasing branch through the second end of the first heat exchange branch; the first preset temperature value is less than the second preset temperature value, and the first preset radiation value is less than the second preset radiation value.

[0008] Further, the heat pump system further comprises: a first three-way reversing valve connected with the second end of the first heat exchange branch, the one end of the first heat exchanger close to the second end of the first heat exchange branch, and the enthalpy increasing branch; the first three-way reversing valve is used to control the flow path of the refrigerant in the first heat exchange branch; wherein, when the heat pump system is in the heating mode, and the outdoor temperature is less than the first preset temperature value, and the solar radiation value is less than the first preset radiation value, the first three-way reversing valve connects the second end of the first heat exchange branch with the one end of the first heat exchanger, so that the refrigerant in the first heat exchange branch flows into the first heat exchanger; when the heat pump system is in the heating mode, the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value, the first three-way reversing valve connects the second end of the first heat exchange branch with the enthalpy increasing branch, so that the refrigerant in the first heat exchange branch flows into the enthalpy increasing branch.

[0009] Further, the heat pump system further comprises: a main pipeline, a first end of the main pipeline is connected with the compressor, and a second end of the main pipeline is connected with the one end of the first heat exchanger close to the first heat exchange branch; the main pipeline is connected with the first heat exchange branch in parallel; a four-way reversing valve, a first end A of the four-way reversing valve is connected with the exhaust port of the compressor, a second end B of the four-way reversing valve is connected with the one end of the first heat exchanger away from the first heat exchange branch, a third end C of the four-way reversing valve is connected with the suction port of the compressor, and a fourth end D of the four-way reversing valve is connected with the first end of the main pipeline and the first end of the first heat exchange branch respectively; when the heat pump system is in the heating mode, the exhaust port of the compressor is connected with the first end of the main pipeline and the first end of the first heat exchange branch through the four-way reversing valve, so that the refrigerant output from the exhaust port of the compressor flows to the first heat exchange branch and the main pipeline respectively.

[0010] Further, the heat pump system further comprises: a second heat exchanger, a first end of the second heat exchanger is connected with the fourth end D of the four-way reversing valve, and a second end of the second heat exchanger is connected with the first end of the main pipeline and the first end of the first heat exchange branch respectively; the second heat exchanger is used for heat exchange with the user end.

[0011] Further, the heat pump system further comprises: an economizer, a first end of the economizer is connected with the second end of the second heat exchanger, a second end of the economizer is connected with the first end of the main pipeline and the first end of the first heat exchange branch respectively; an enthalpy-increasing branch, a first end of the enthalpy-increasing branch is connected with a third end of the economizer, and a second end of the enthalpy-increasing branch is connected with the middle-pressure cavity of the compressor; a first control valve, the first control valve is arranged on the economizer, and the first control valve is used for controlling the on-off of the economizer and the enthalpy-increasing branch; when the heat pump system performs the enthalpy-increasing control, the first control valve is opened, so that the refrigerant flowing out of the second heat exchanger flows out of the second end of the economizer and the third end of the economizer respectively.

[0012] Further, the heat pump system further comprises: a second three-way reversing valve, the second three-way reversing valve is arranged on the first heat exchange branch, and the second three-way reversing valve is located at one end of the first heat exchange branch close to the first heat exchanger; a first end of the second three-way reversing valve and a second end of the second three-way reversing valve are connected with the first heat exchange branch respectively; a second heat exchange branch, a first end of the second heat exchange branch is connected with the second end B of the four-way reversing valve in an on-off manner, and a second end of the second heat exchange branch is connected with a third end of the second three-way reversing valve; when the heat pump system is in the refrigeration mode, the outdoor temperature is greater than a third preset temperature value, and the solar radiation value is greater than a third preset radiation value, the first end of the second heat exchange branch is connected with the second end B of the four-way reversing valve, and the second three-way reversing valve is used for connecting the second end of the second heat exchange branch with the first heat exchange branch; so that at least part of the refrigerant flowing out of the exhaust port of the compressor flows to the first heat exchanger through the four-way reversing valve and the second heat exchange branch, the refrigerant flowing into the first heat exchanger exchanges heat with the storage circulation loop, and the refrigerant in the first heat exchanger transmits heat to the storage circulation loop; the first preset temperature value is less than the third preset temperature value, and the first preset radiation value is less than the third preset radiation value.

[0013] Further, the heat pump system further comprises: a third three-way reversing valve, the third three-way reversing valve is arranged on the first heat exchange branch, the third three-way reversing valve is located between the second three-way reversing valve and the first end of the first heat exchange branch; the first end of the third three-way reversing valve and the second end of the third three-way reversing valve are connected with the first heat exchange branch respectively; a first pipeline, one end of the first pipeline is connected with the third end of the third three-way reversing valve, the other end of the first pipeline is connected with the main pipeline; when the heat pump system is in the refrigeration mode, the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value, the third three-way reversing valve is used to communicate the first heat exchange branch and the first pipeline, and the refrigerant in the first heat exchange branch after heat exchange flows to the main pipeline through the first pipeline.

[0014] Further, the heat pump system further comprises: a second control valve, the second control valve is connected with the first end of the second heat exchange branch and the second end B of the four-way reversing valve respectively, and the second control valve is used to control the on-off between the first end of the second heat exchange branch and the second end B of the four-way reversing valve; the second control valve is arranged in parallel with the first heat exchanger; when the heat pump system is in the refrigeration mode, the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value, the second control valve is used to connect the first end of the second heat exchange branch and the second end B of the four-way reversing valve.

[0015] Further, the storage circulation loop comprises: a buried pipe, the buried pipe is arranged in the stratum, and the buried pipe is used to store or release heat in the stratum; a water tank, the water outlet end of the water tank is connected with the water inlet end of the buried pipe through a second pipeline, and the water return end of the water tank is connected with the water outlet end of the buried pipe through a third pipeline; the water flowing out of the water tank is used to exchange heat with the solar circulation loop, and the water after absorbing heat flows into the buried pipe; the buried pipe is used to absorb the heat of the water or release heat to heat the water, and the water after being processed by the buried pipe flows out through the water outlet end of the buried pipe; when the storage circulation loop has a storage state and a release state, when the storage circulation loop is in the storage state, the water after heat exchange between the storage circulation loop and the solar circulation loop flows into the buried pipe, and the buried pipe absorbs the heat of the water to store the absorbed heat in the stratum; when the storage circulation loop is in the release state, the water after heat exchange between the storage circulation loop and the solar circulation loop flows into the buried pipe, and the buried pipe releases heat to heat the water, and the heated water flows out of the buried pipe.

[0016] Further, the heat pump system further comprises: a first heat exchanger, the first heat exchange branch and the third pipeline are connected through the first heat exchanger; the third pipeline is connected with the first heat exchange branch through the first heat exchanger in heat exchange mode; and / or the storage circulation loop further comprises: a first circulating pump, the first circulating pump is connected with the water outlet end of the buried pipe and the third pipeline respectively.

[0017] Advantages:

[0018] The utility model discloses a technical scheme, the utility model provides multi -heat source formula's heat pump system, including compressor, first heat exchanger, solar circulation loop, storage circulation loop and first heat exchange branch, the compressor of this system is used for compressing refrigerant, and the compressor is connected with first heat exchanger, and first heat exchanger is used for heat exchange with outdoor air. At the same time, the heat transfer medium with circulating flow is in solar circulation loop, and solar circulation loop is used for absorbing the heat of sun and is given to heat transfer medium. Solar circulation loop and storage circulation loop heat exchange connection, and storage circulation loop is used for absorbing the heat that solar circulation loop absorbs, that is, absorbing the heat that the heat transfer medium in solar circulation loop carries, and the heat after absorbing is stored in the stratum, that is, the heat after heat exchange with solar circulation loop is stored in the stratum, and storage circulation loop also has the function of releasing heat. In addition, the first end of first heat exchange branch is connected with compressor, and the second end of first heat exchange branch is connected with one end of first heat exchanger and can be connected or disconnected, and first heat exchange branch is used for refrigerant flow. First heat exchange branch and storage circulation loop heat exchange connection. When the heat pump system is heating mode, and outdoor temperature is less than first preset temperature value, and solar radiation value is less than first preset radiation value, the second end of first heat exchange branch is connected with one end of first heat exchanger, and storage circulation loop releases heat. At least part of the refrigerant that flows out of compressor flows into first heat exchange branch, then, storage circulation loop and the refrigerant in first heat exchange branch heat exchange, so that the refrigerant in first heat exchange branch absorbs the heat released by storage circulation loop. The refrigerant in first heat exchange branch after absorbing heat flows to first heat exchanger through the second end of first heat exchange branch. Adopt such structural setting, by setting solar circulation loop and storage circulation loop, realize the heat that solar circulation loop absorbs the heat of sun is stored in the stratum soil through heat exchange with storage circulation loop. Because the heat in the stratum can be stored for a long time, even in the case of no solar radiation, stable heat source can be provided, thereby improving the energy utilization efficiency of the system. At the same time, when the heat pump system is heating mode, and outdoor temperature is less than first preset temperature value, and solar radiation value is less than first preset radiation value, storage circulation loop releases heat, and the refrigerant in first heat exchange branch is preheated by the heat in the stratum. This process reduces the risk of frost and ice formation in first heat exchanger, thereby improving the reliability and efficiency of the system at low temperature. In addition, releasing the heat in the stratum can effectively ensure the stable operation of the system. In addition, the system makes full use of solar energy, heat in the stratum and air, reduces the dependence on fossil fuels, and significantly reduces carbon emissions. And the system can automatically adjust the operation mode according to outdoor temperature and solar radiation value, ensure efficient operation under different environmental conditions, optimize multi -heat source coupling, thereby improving the energy efficiency and flexibility of the heat pump system. The multi -heat source formula's heat pump system of the utility model can effectively solve the technical problem that the air source heat pump system of prior art is prone to frost in winter heating. Attached Figure Description

[0019] Figure 1 A schematic diagram of an embodiment of the multi-heat-source heat pump system of this utility model is shown.

[0020] The above figures include the following reference numerals:

[0021] 1. Compressor; 2. First heat exchanger; 3. Solar circulation loop; 31. Solar collector; 32. Fourth pipeline; 33. Second circulation pump; 4. Storage circulation loop; 41. Buried pipe; 42. Water tank; 43. Second pipeline; 44. Third pipeline; 45. First circulation pump; 5. First heat exchange branch; 6. Enthalpy-increasing branch; 7. First three-way reversing valve; 8. Main pipeline; 9. Four-way reversing valve; 10. Second heat exchanger; 11. Economizer; 12. First control valve; 13. Second three-way reversing valve; 14. Second heat exchange branch; 15. Third three-way reversing valve; 16. First pipeline; 17. Second control valve; 18. First heat exchanger; 19. Third control valve; 20. Oil separator; 21. Fourth control valve; 22. Second heat exchanger; 23. Gas-liquid separator. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0023] Please see Figure 1As shown, according to the embodiment of the utility model, the utility model provides a kind of multi-heat source type heat pump system, the multi-heat source type heat pump system includes: compressor 1, first heat exchanger 2, solar circulation loop 3, storage circulation loop 4 and first heat exchange branch 5, compressor 1 is connected with first heat exchanger 2, and first heat exchanger 2 is used to carry out heat exchange with outdoor air;Solar circulation loop 3 is used to absorb the heat of sun;Solar circulation loop 3 is connected with storage circulation loop 4 heat exchange;Storage circulation loop 4 is used to store heat exchange after solar circulation loop 3 in stratum or release heat;The first end of first heat exchange branch 5 is connected with compressor 1, and the second end of first heat exchange branch 5 is connected with one end of first heat exchanger 2 can be connected and disconnected;First heat exchange branch 5 is connected with storage circulation loop 4 heat exchange;When heat pump system is heating mode, and outdoor temperature is less than first preset temperature value, solar radiation value is less than first preset radiation value, the second end of first heat exchange branch 5 is connected with one end of first heat exchanger 2, storage circulation loop 4 releases heat, and storage circulation loop 4 and refrigerant in first heat exchange branch 5 heat exchange, to make the refrigerant in first heat exchange branch 5 absorb the heat released by storage circulation loop 4;The refrigerant in first heat exchange branch 5 after heat absorption flows to first heat exchanger 2 by the second end of first heat exchange branch 5.

[0024] It can be seen that the multi-heat source heat pump system provided by the utility model, including compressor 1, first heat exchanger 2, solar circulation loop 3, storage circulation loop 4 and first heat exchange branch 5, the compressor 1 of the system is used for compressing refrigerant, the compressor 1 is connected with the first heat exchanger 2, and the first heat exchanger 2 is used for heat exchange with outdoor air. At the same time, the heat transfer medium circulates in the solar circulation loop 3, and the solar circulation loop 3 is used to absorb the heat of the sun and transfer to the heat transfer medium. The solar circulation loop 3 is heat exchange connected with the storage circulation loop 4, and the storage circulation loop 4 is used to absorb the heat absorbed by the solar circulation loop 3 (that is, the heat carried by the heat transfer medium in the solar circulation loop 3), and store the heat absorbed in the stratum (that is, store the heat exchanged with the solar circulation loop 3 in the stratum), and the storage circulation loop 4 also has the function of releasing heat. In addition, the first end of the first heat exchange branch 5 is connected with the compressor 1, the second end of the first heat exchange branch 5 is connected with one end of the first heat exchanger 2 in an on-off manner, and the first heat exchange branch is used for refrigerant flow; the first heat exchange branch 5 is heat exchange connected with the storage circulation loop 4. When the heat pump system is in heating mode, and the outdoor temperature is less than the first preset temperature value, and the solar radiation value is less than the first preset radiation value, the second end of the first heat exchange branch 5 is connected with one end of the first heat exchanger 2, and the storage circulation loop 4 releases heat; at least part of the refrigerant flowing out of the compressor 1 flows into the first heat exchange branch 5, then the storage circulation loop 4 and the refrigerant in the first heat exchange branch 5 are heat exchanged, so that the refrigerant in the first heat exchange branch 5 absorbs the heat released by the storage circulation loop 4; the refrigerant in the first heat exchange branch 5 after absorbing heat flows to the first heat exchanger 2 through the second end of the first heat exchange branch 5. By adopting such structure, by setting the solar circulation loop 3 and the storage circulation loop 4, the heat absorbed by the solar circulation loop 3 from the sun is stored in the stratum (soil) by heat exchange with the storage circulation loop 4. Because the heat in the stratum can be stored for a long time, even in the absence of solar radiation, a stable heat source can be provided, thereby improving the energy utilization efficiency of the system. At the same time, when the heat pump system is in heating mode, and the outdoor temperature is less than the first preset temperature value, and the solar radiation value is less than the first preset radiation value, the storage circulation loop 4 releases heat, and the refrigerant in the first heat exchange branch 5 is preheated by the heat in the stratum. This process reduces the risk of frosting and icing of the first heat exchanger 2, thereby improving the reliability and efficiency of the system at low temperature. In addition, releasing the heat in the stratum can effectively ensure the stable operation of the system. In addition, the system makes full use of solar energy, heat in the stratum and air, reduces dependence on fossil fuels, and significantly reduces carbon emissions. And the system can automatically adjust the operation mode according to the outdoor temperature and the solar radiation value, ensure efficient operation under different environmental conditions, optimize multi-heat source coupling, thereby improving the energy efficiency and flexibility of the heat pump system.The multi-heat source heat pump system can effectively solve the technical problem of frost formation of the air source heat pump system in the prior art during winter heating.

[0025] When the outdoor temperature is less than the first preset temperature value and the solar radiation value is less than the first preset radiation value, it indicates that the outdoor environment is low in temperature and radiation, which usually means that the weather is cold and the sunlight is insufficient, and the first heat exchanger 2 in the heat pump system is prone to frost and ice formation.

[0026] Optionally, the first heat exchanger 2 is a fin heat exchanger.

[0027] Optionally, the fin heat exchanger can be a water-cooled shell and tube type, a water-cooled plate and shell type, a water evaporation type, or a fan fin coil air cooling type.

[0028] Optionally, when the heat pump system is in the heating mode, and the outdoor temperature is less than the first preset temperature value and the solar radiation value is less than the first preset radiation value, the storage circulation loop 4 releases heat, and the second end of the first heat exchanger branch 5 is connected to one end of the first heat exchanger 2; after the refrigerant discharged from the exhaust port of the compressor 1 exchanges heat with the user end, at least part of the refrigerant flows into the first heat exchanger branch 5, the refrigerant flowing into the first heat exchanger branch 5 absorbs the heat released by the storage circulation loop 4, thereby increasing the temperature of the refrigerant, and the refrigerant with increased temperature flows into the first heat exchanger 2 through the second end of the first heat exchanger branch 5 and one end of the first heat exchanger 2, thereby increasing the surface temperature of the first heat exchanger 2, thereby effectively reducing the risk of frost and ice formation of the first heat exchanger 2 and improving the heat exchange efficiency of the first heat exchanger 2. After the refrigerant entering the first heat exchanger 2 completes heat exchange, it flows out from the other end of the first heat exchanger 2 away from the first heat exchanger branch 5 and flows to the suction port of the compressor 1.

[0029] Further, the heat pump system comprises a temperature sensor and a solar radiation sensor, the temperature sensor is used to detect the temperature of the outdoor environment, and the solar radiation sensor is used to detect the intensity of the solar radiation of the outdoor environment.

[0030] Further, the solar energy circulation loop 3 comprises a solar energy collector 31 and a fourth pipeline 32, the solar energy collector 31 is used for absorbing the heat of the sun and converting it into heat energy; two ends of the fourth pipeline 32 are connected with the input end and the output end of the solar energy collector 31 respectively, and the fourth pipeline 32 is used for the flow of the heat transfer medium. The heat transfer medium enters into the solar energy collector 31 through the input end of the solar energy collector 31, exchanges heat with the solar energy collector 31, the solar energy collector 31 transmits the heat converted from the solar radiation to the heat transfer medium, the heat transfer medium carrying the heat flows out through the output end of the solar energy collector 31 and flows into the fourth pipeline 32, then in the fourth pipeline 32, the heat transfer medium carrying the heat exchanges heat with the storage circulation loop 4, transmits the heat carried by the heat transfer medium to the storage circulation loop 4, and then stores the heat in the stratum through the storage circulation loop 4.

[0031] Further, the solar energy circulation loop 3 further comprises a second circulation pump 33, the second circulation pump 33 is arranged on the fourth pipeline 32, and the second circulation pump 33 is located at the output end of the solar energy collector 31. The second circulation pump 33 is used for continuously flowing the heat transfer medium in the solar energy circulation loop 3, and ensures that the heat can be effectively transferred from the solar energy collector 31 to the storage circulation loop 4.

[0032] Optionally, the heat transfer medium is water.

[0033] Specifically, as Figure 1As shown, the heat pump system further comprises: an enthalpy increasing branch 6 connected with the exhaust port of the compressor 1 and the medium pressure cavity of the compressor 1 respectively; the second end of the first heat exchange branch 5 is connected with the enthalpy increasing branch 6 in an on-off manner; when the heat pump system is in the heating mode, the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value, the second end of the first heat exchange branch 5 is disconnected from one end of the first heat exchanger 2, and the second end of the first heat exchange branch 5 is connected with the enthalpy increasing branch 6, the storage circulation loop 4 releases heat, and the storage circulation loop 4 exchanges heat with the refrigerant in the first heat exchange branch 5, so that the refrigerant in the first heat exchange branch 5 absorbs the heat released by the storage circulation loop 4; the refrigerant in the first heat exchange branch 5 after absorbing heat flows into the enthalpy increasing branch 6 through the second end of the first heat exchange branch 5; the first preset temperature value is less than the second preset temperature value, and the first preset radiation value is less than the second preset radiation value. By adopting such a structure, by arranging the enthalpy increasing branch 6, a part of high-temperature and high-pressure refrigerant gas can be introduced into the medium pressure cavity of the compressor, and this part of gas is mixed with the main refrigerant in the medium pressure cavity, so that the intermediate pressure is improved. By improving the intermediate pressure, the power consumption required by the compressor 1 in the compression process is reduced, thereby improving the overall efficiency of the compressor 1. At the same time, the second end of the first heat exchange branch 5 is connected with the enthalpy increasing branch 6 in an on-off manner, so that when the heat pump system is in the heating mode, the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value, the heat released by the storage circulation loop 4 can be transmitted to the medium pressure cavity of the compressor 1 through the enthalpy increasing branch 6, thereby further improving the enthalpy temperature and the efficiency of the compressor, and improving the energy efficiency of the whole system.

[0034] When the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value, it means that the outdoor environment is in a medium temperature and medium radiation environment. This means that the temperature and radiation level of the outdoor environment are generally comfortable at this time, neither too cold nor too hot. In addition, the load of the heat pump system is generally low, so that the heat can be more efficiently absorbed. In order to maintain the temperature at the user end at a comfortable level, it is necessary to further improve the enthalpy temperature, so that more heat can be released to the user end during the heat exchange process of the heat pump system, to meet the heating demand.

[0035] Specifically, as shown in FIG. 1, the heat pump system comprises: a compressor 1, a first heat exchanger 2, a first heat exchange branch 5, a storage circulation loop 4, and a second heat exchanger 3. Figure 1As shown, the heat pump system further comprises: a first three-way reversing valve 7, the first three-way reversing valve 7 is connected with the second end of the first heat exchange branch 5, one end of the first heat exchanger 2 close to the second end of the first heat exchange branch 5 and the enthalpy increasing branch 6 respectively; the first three-way reversing valve 7 is used to control the flow path of the refrigerant in the first heat exchange branch 5; wherein, when the heat pump system is in the heating mode, and the outdoor temperature is less than the first preset temperature value, and the solar radiation value is less than the first preset radiation value, the first three-way reversing valve 7 connects the second end of the first heat exchange branch 5 with one end of the first heat exchanger 2, so that the refrigerant in the first heat exchange branch 5 flows into the first heat exchanger 2; when the heat pump system is in the heating mode, the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value, the first three-way reversing valve 7 connects the second end of the first heat exchange branch 5 with the enthalpy increasing branch 6, so that the refrigerant in the first heat exchange branch 5 flows into the enthalpy increasing branch 6. By adopting such a structure, by arranging the first three-way reversing valve 7, the flow path of the refrigerant in the first heat exchange branch 5 can be flexibly controlled according to the operation mode of the heat pump system, different outdoor temperatures and solar radiation conditions, so as to optimize the operation efficiency and stability of the system, and improve the overall energy efficiency of the system.

[0036] Specifically, as shown in the figure, Figure 1 As shown, the heat pump system further comprises: a main pipeline 8 and a four-way reversing valve 9, the first end of the main pipeline 8 is connected with the compressor 1, and the second end of the main pipeline 8 is connected with one end of the first heat exchanger 2 close to the first heat exchange branch 5; the main pipeline 8 is arranged in parallel with the first heat exchange branch 5; the first end A of the four-way reversing valve 9 is connected with the exhaust port of the compressor 1, the second end B of the four-way reversing valve 9 is connected with one end of the first heat exchanger 2 away from the first heat exchange branch 5, the third end C of the four-way reversing valve 9 is connected with the suction port of the compressor 1, and the fourth end D of the four-way reversing valve 9 is connected with the first end of the main pipeline 8 and the first end of the first heat exchange branch 5 respectively; when the heat pump system is in the heating mode, the exhaust port of the compressor 1 is connected with the first end of the main pipeline 8 and the first end of the first heat exchange branch 5 through the four-way reversing valve 9, so that the refrigerant output from the exhaust port of the compressor 1 flows to the first heat exchange branch 5 and the main pipeline 8 respectively. By adopting such a structure, by arranging the four-way reversing valve 9, the flow direction of the refrigerant can be changed, so that the heat pump system realizes the switching between the heating mode and the cooling mode.

[0037] Further, as shown in the figure, Figure 1 As shown, the heat pump system further comprises: a third control valve 19, the third control valve 19 is arranged on the main pipeline 8, and the third control valve 19 is located close to the first end of the main pipeline 8. The third control valve 19 is used to control the on-off of the main pipeline 8. The third control valve 19 is in the normally open state.

[0038] Optionally, the third control valve 19 is a main valve.

[0039] Further, as shown in Figure 1 the heat pump system further comprises an oil separator 20, the oil separator 20 is connected with the first end A of the four-way reversing valve 9 and the exhaust port of the compressor 1 respectively, and the first end A of the four-way reversing valve 9 is connected with the exhaust port of the compressor 1 through the oil separator 20.

[0040] Specifically, the heat pump system further comprises a second heat exchanger 10, the first end of the second heat exchanger 10 is connected with the fourth end D of the four-way reversing valve 9, and the second end of the second heat exchanger 10 is connected with the first end of the main pipeline 8 and the first end of the first heat exchange branch 5 respectively; the second heat exchanger 10 is used for heat exchange with the user end. By adopting such a structural arrangement, by arranging the second heat exchanger 10, the refrigerant flowing into the second heat exchanger 10 can be exchanged with the user end, so that more efficient heat exchange can be realized, thereby ensuring that the user end can quickly obtain the required heat.

[0041] Among them, the user end refers to the terminal equipment or space that needs heating or refrigeration.

[0042] Optionally, the second heat exchanger 10 is a plate heat exchanger. When the heat pump system is in a heating mode, the second heat exchanger 10 serves as an evaporator, and when the heat pump system is in a refrigeration mode, the second heat exchanger 10 serves as a condenser.

[0043] Specifically, the heat pump system further comprises an economizer 11 and a first control valve 12, the first end of the economizer 11 is connected with the second end of the second heat exchanger 10, the second end of the economizer 11 is connected with the first end of the main pipeline 8 and the first end of the first heat exchange branch 5 respectively, the first end of the enthalpy increasing branch 6 is connected with the third end of the economizer 11, and the second end of the enthalpy increasing branch 6 is connected with the medium-pressure cavity of the compressor 1; the first control valve 12 is arranged on the economizer 11, and the first control valve 12 is used for controlling the on-off of the economizer 11 and the enthalpy increasing branch 6; wherein when the heat pump system performs enthalpy increasing control, the first control valve 12 is opened to make the refrigerant flowing out of the second heat exchanger 10 flow out of the second end of the economizer 11 and the third end of the economizer 11 respectively. By adopting such a structural arrangement, by arranging the economizer 11, the pressure of the refrigerant entering the enthalpy increasing branch 6 can be increased when the heat pump system performs enthalpy increasing control, thereby improving the heating or refrigeration capacity of the heat pump system. At the same time, by arranging the first control valve 12, the flow direction of the refrigerant can be flexibly controlled according to the system demand, so as to ensure that the refrigerant can flow efficiently in different operating modes, thereby improving the operating efficiency of the system.

[0044] Optionally, the first control valve 12 is an auxiliary valve.

[0045] Optionally, the economizer 11 can also be replaced by a flash evaporator.

[0046] Specifically, the heat pump system further comprises: a second three-way reversing valve 13 and a second heat exchange branch 14, the second three-way reversing valve 13 is arranged on the first heat exchange branch 5, and the second three-way reversing valve 13 is located at one end of the first heat exchange branch 5 close to the first heat exchanger 2; the first end of the second three-way reversing valve 13 and the second end of the second three-way reversing valve 13 are respectively connected with the first heat exchange branch 5; the first end of the second heat exchange branch 14 is connected with the second end B of the four-way reversing valve 9 in an on-off manner, and the second end of the second heat exchange branch 14 is connected with the third end of the second three-way reversing valve 13; wherein, when the heat pump system is in a cooling mode, the outdoor temperature is greater than a third preset temperature value, and the solar radiation value is greater than a third preset radiation value, the first end of the second heat exchange branch 14 is connected with the second end B of the four-way reversing valve 9, and the second three-way reversing valve 13 is used to communicate the second end of the second heat exchange branch 14 with the first heat exchange branch 5; so that at least part of the refrigerant flowing out of the exhaust port of the compressor 1 flows to the first heat exchanger 2 through the four-way reversing valve 9 and the second heat exchange branch 14, the refrigerant flowing into the first heat exchanger 2 exchanges heat with the storage circulation loop 4, and the refrigerant in the first heat exchanger 2 transmits heat to the storage circulation loop 4. When the heat pump system is in a heating mode, and the outdoor temperature is less than a first preset temperature value, and the solar radiation value is less than a first preset radiation value, the second three-way reversing valve 13 is used to communicate the first end of the first heat exchange branch 5 with the second end of the first heat exchange branch 5, and the first end of the second heat exchange branch 14 is disconnected with the second end B of the four-way reversing valve 9. The first preset temperature value is less than the third preset temperature value, and the first preset radiation value is less than the third preset radiation value. By adopting such a structure, by arranging the second three-way reversing valve 13 and the second heat exchange branch 14, when the heat pump system is in a cooling mode, the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 1 flows into the second heat exchange branch 14 and the first heat exchanger 2 respectively, and then flows into the first heat exchange branch 5 through the second heat exchange branch 14, so as to exchange heat between the refrigerant carrying heat and the storage circulation loop 4, to transmit the heat carried by the refrigerant to the storage circulation loop 4, and then store it in the stratum, thereby further improving the utilization rate of the system. At the same time, the temperature of the refrigerant can be reduced, thereby improving the refrigeration effect of the system.

[0047] When the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value, it means that the outdoor environment is high in ambient temperature and strong in radiation. At this time, the heat release effect of the refrigerant entering the first heat exchanger 2 is poor, and heat is also wasted. By flowing part of the refrigerant into the first heat exchange branch 5 for heat exchange, the heat can be recovered and the temperature of the refrigerant can be reduced, thereby improving the refrigeration effect of the system.

[0048] Optionally, the second preset temperature value is less than the third preset temperature value, and the third preset radiation value is greater than the second preset radiation value.

[0049] Specifically, the heat pump system further comprises a third three-way reversing valve 15 and a first pipeline 16, the third three-way reversing valve 15 is arranged on the first heat exchange branch 5, and the third three-way reversing valve 15 is located between the second three-way reversing valve 13 and the first end of the first heat exchange branch 5; a first end of the third three-way reversing valve 15 and a second end of the third three-way reversing valve 15 are connected with the first heat exchange branch 5 respectively; one end of the first pipeline 16 is connected with a third end of the third three-way reversing valve 15, and the other end of the first pipeline 16 is connected with the main pipeline 8; when the heat pump system is in the refrigeration mode, the outdoor temperature is greater than a third preset temperature value, and the solar radiation value is greater than a third preset radiation value, the third three-way reversing valve 15 is used to communicate the first heat exchange branch 5 and the first pipeline 16, and the refrigerant in the first heat exchange branch 5 after heat exchange flows to the main pipeline 8 through the first pipeline 16. By adopting the structure, the third three-way reversing valve 15 and the first pipeline 16 are arranged, the refrigerant in the first heat exchange branch 5 after heat exchange can flow to the main pipeline 8 when the heat pump system is in the refrigeration mode, so that the refrigerant in the first heat exchange branch 5 and the refrigerant in the main pipeline 8 are mixed, and the temperature of the refrigerant is effectively reduced. In addition, the third three-way reversing valve 15 is arranged, so that the system can flexibly switch the flow path of the refrigerant in different operation modes.

[0050] Optionally, the third control valve 19 is located between the first end of the main pipeline 8 and the first pipeline 16.

[0051] Further, the heat pump system further comprises a fourth control valve 21, the fourth control valve 21 is arranged on the first pipeline 16, and the fourth control valve 21 is used to control the opening and closing of the first pipeline 16.

[0052] Optionally, the heat pump system further comprises a confluence valve, the confluence valve is arranged on the main pipeline 8, and the confluence valve is located between the third control valve 19 and the first heat exchanger 2; the confluence valve is connected with one end of the first pipeline 16 away from the third three-way reversing valve 15, the first end of the main pipeline 8 and the second end of the main pipeline 8 respectively; when the heat pump system is in the refrigeration mode, the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value, the confluence valve is used to collect the refrigerant flowing out of the first pipeline 16 and the refrigerant flowing out of the first heat exchanger 2, and then the collected refrigerant flows to the first end of the main pipeline 8.

[0053] In addition, the confluence valve also has the function of balancing the refrigerant pressure of each branch.

[0054] Specifically, the heat pump system further comprises: a second control valve 17, the second control valve 17 is connected with the first end of the second heat exchange branch 14 and the second end B of the four-way reversing valve 9 respectively, and the second control valve 17 is used for controlling the on-off between the first end of the second heat exchange branch 14 and the second end B of the four-way reversing valve 9; the second control valve 17 is arranged in parallel with the first heat exchanger 2; wherein, when the heat pump system is in the cooling mode, the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value, the second control valve 17 is connected with the first end of the second heat exchange branch 14 and the second end B of the four-way reversing valve 9. By adopting such a structure, the second control valve 17 can be flexibly controlled according to the system requirements, so that the flow direction of the refrigerant can be controlled, and the refrigerant can flow efficiently in different operating modes, thereby improving the operating efficiency of the system.

[0055] Specifically, the storage circulation loop 4 comprises: a buried pipe 41 and a water tank 42, the buried pipe 41 is arranged in the stratum, and the buried pipe 41 is used for storing or releasing heat in the stratum; the water outlet end of the water tank 42 is connected with the water inlet end of the buried pipe 41 through the second pipeline 43, and the water return end of the water tank 42 is connected with the water outlet end of the buried pipe 41 through the third pipeline 44; the water flowing out of the water tank 42 is used for heat exchange with the solar circulation loop 3, and the water after absorbing heat flows into the buried pipe 41; the buried pipe 41 is used for absorbing the heat of the water or releasing heat to heat the water, and the treated water of the buried pipe 41 flows out through the water outlet end of the buried pipe 41; wherein, the storage circulation loop 4 has a storage state and a release state, when the storage circulation loop 4 is in the storage state, the water after heat exchange between the storage circulation loop 4 and the solar circulation loop 3 flows into the buried pipe 41, and the buried pipe 41 absorbs the heat of the water to store the absorbed heat in the stratum; when the storage circulation loop 4 is in the release state, the water after heat exchange between the storage circulation loop 4 and the solar circulation loop 3 flows into the buried pipe 41, and the buried pipe 41 releases heat to heat the water, and the heated water flows out of the buried pipe 41. By arranging the buried pipe 41 in the stratum, the heat can be effectively stored in the stratum. In addition, according to the actual demand of the heat pump system, the buried pipe 41 can release heat from the stratum. At the same time, by arranging the water tank 42, a heat transfer medium can be provided, the water can be heat exchanged with the solar circulation loop 3, and then heat can be provided for the buried pipe 41. In addition, by arranging the water tank, the remaining waste heat after heat exchange with the buried pipe 41 can be used to heat the water in the water tank 42, so as to provide the heated water in the water tank 42 for users to use, thereby improving the energy utilization rate. In addition, by taking the stratum as a heat storage medium, the storage circulation loop 4 can more efficiently utilize solar hot water and reduce the dependence on external energy. In the case of need, the stored heat can be released to the water to heat or meet other heat demands.

[0056] Specifically, the heat pump system further comprises: a first heat exchanger 18, the first heat exchange branch 5 and the third pipeline 44 all pass through the first heat exchanger 18; the third pipeline 44 is in heat exchange connection with the first heat exchange branch 5 through the first heat exchanger 18. With such a structure, the water in the third pipeline 44 can effectively exchange heat with the refrigerant in the first heat exchange branch 5 through the first heat exchanger 18, ensuring efficient transfer of heat energy and maximizing the heat exchange efficiency of the system.

[0057] Specifically, the storage circulation loop 4 further comprises: a first circulation pump 45, the first circulation pump 45 is connected with the water outlet end of the buried pipe 41 and the third pipeline 44 respectively. With such a structure, the water can continuously flow in the storage circulation loop 4 through the first circulation pump 45.

[0058] Further, the heat pump system further comprises: a second heat exchanger 22, the second pipeline 43 and the fourth pipeline 32 all pass through the second heat exchanger 22; the second pipeline 43 is in heat exchange connection with the fourth pipeline 32 through the second heat exchanger 22.

[0059] Further, the heat pump system further comprises: a gas-liquid separator 23, the third end C of the four-way reversing valve 9 is connected with the suction port of the compressor 1 through the gas-liquid separator 23.

[0060] Optionally, the operation process of the heat pump system is as follows:

[0061] The first operation mode: when the heat pump system executes the refrigeration mode and no refrigerant flows into the second heat exchange branch 14, the second control valve 17 is in the open state, the second heat exchange branch 14 is disconnected with the second end B of the four-way reversing valve 9; the first control valve 12 is in the open state, the fourth control valve 21 is in the open state, and the third four-way reversing valve 15 connects the first end of the first heat exchange branch 5 with the first pipeline 16. The refrigerant flowing out of the exhaust port of the compressor 1 flows to the first heat exchanger 2 through the oil separator 20, the first end A of the four-way reversing valve 9 and the second end B of the four-way reversing valve 9, and then flows to the second heat exchanger 10 through the second end of the main pipeline 8 and the economizer 11 after releasing heat in the first heat exchanger 2. The refrigerant entering the second heat exchanger 10 exchanges heat with the user end, and then flows to the gas-liquid separator 23 through the fourth end D of the four-way reversing valve 9 and the third end C of the four-way reversing valve 9. The refrigerant processed by the gas-liquid separator 23 flows to the suction port of the compressor 1.

[0062] Meanwhile, the solar collector 31 absorbs solar radiation and transfers the heat converted from the solar radiation to the heat transfer medium, the heat-carrying heat transfer medium flows out of the solar collector 31 through the output end and flows into the fourth pipeline 32, the heat-carrying heat transfer medium exchanges heat with the water in the second pipeline 43 through the second heat exchanger 22, the water in the second pipeline 43 absorbs heat and flows into the ground pipe 41, and then the ground pipe 41 absorbs the heat carried by the water and stores the absorbed heat in the stratum. The water absorbed by the ground pipe 41 flows into the water tank 42 through the third pipeline 44. The water absorbed by the ground pipe 41 will have residual heat, which will heat the water in the water tank 42.

[0063] In addition, when it is necessary to heat the water in the water tank to a preset temperature, the ground pipe 41 releases heat to quickly heat the water in the water tank 42.

[0064] The second operating mode: when the heat pump system executes the heating mode and does not need to execute the enthalpy increasing control and does not need to increase the temperature of the refrigerant, the first control valve 12 is in the open state, the second control valve 17 is in the open state, the fourth control valve 21 is in the open state, and the third three-way reversing valve 15 connects the first end of the first heat exchange branch 5 with the first pipeline 16. The refrigerant flowing out of the exhaust port of the compressor 1 flows through the oil separator 20, the first end A of the four-way reversing valve 9 and the fourth end D of the four-way reversing valve 9 to the second heat exchanger 10, the refrigerant entering the second heat exchanger 10 exchanges heat with the user end, the exchanged refrigerant passes through the economizer 11, and then the refrigerant sequentially flows through the main pipeline 8 and the third control valve 19 to the first heat exchanger 2, then sequentially flows through the first heat exchanger 2, the second end B of the four-way reversing valve 9 and the third end C of the four-way reversing valve 9 to the gas-liquid separator 23, and then the refrigerant processed by the gas-liquid separator 23 flows to the suction port of the compressor 1.

[0065] The working process of the solar circulation loop and the storage circulation loop is the same as that in the first operating mode, which will not be described here.

[0066] The third operation mode: when the heat pump system executes the heating mode, and executes the enthalpy-increasing control and does not need to increase the temperature of the refrigerant, the first control valve 12 is in the connected state, the second control valve 17 is in the disconnected state, the fourth control valve 21 is in the disconnected state, and the third three-way reversing valve 15 connects the first end of the first heat exchange branch 5 with the first pipeline 16. The refrigerant flowing out of the exhaust port of the compressor 1 flows to the second heat exchanger 10 through the oil separator 20, the first end A of the four-way reversing valve 9 and the fourth end D of the four-way reversing valve 9, the refrigerant entering the second heat exchanger 10 exchanges heat with the user end, and after the exchanged refrigerant enters the economizer 11, part of the refrigerant sequentially passes through the first control valve 12 and the enthalpy-increasing branch 6, and enters the medium-pressure cavity of the compressor 1. Another part of the refrigerant sequentially passes through the main pipeline 8 and the third control valve 19 to flow to the first heat exchanger 2, and then sequentially flows to the second end B of the four-way reversing valve 9 and the third end C of the four-way reversing valve 9 to flow to the gas-liquid separator 23, and then the refrigerant treated by the gas-liquid separator 23 flows to the suction port of the compressor 1.

[0067] The working process of the solar circulation loop and the storage circulation loop is the same as the first operation mode, which will not be described here.

[0068] The fourth operation mode: when the heat pump system is in the heating mode, and the outdoor temperature is less than the first preset temperature value, and the solar radiation value is less than the first preset radiation value (i.e. the outdoor is in the condition of low ambient temperature and low radiation), the first control valve 12 is in the disconnected state, the second control valve 17 is in the disconnected state, and the fourth control valve 21 is in the disconnected state. And the solar collector 31 absorbs solar radiation, and transfers the heat converted by the solar radiation to the heat transfer medium, the heat-carrying heat transfer medium flows out through the output end of the solar collector 31 and flows into the fourth pipeline 32, the heat-carrying heat transfer medium exchanges heat with the water in the second pipeline 43 through the second heat exchanger 22, the water in the second pipeline 43 absorbs heat and flows into the ground heat exchanger 41, and then the ground heat exchanger 41 releases heat to further heat the water. The water heated by the ground heat exchanger 41 flows into the third pipeline 44.

[0069] Meanwhile, the refrigerant flowing out of the discharge port of the compressor 1 flows to the second heat exchanger 10 through the oil separator 20, the first end A of the four-way reversing valve 9 and the fourth end D of the four-way reversing valve 9, and the refrigerant entering the second heat exchanger 10 exchanges heat with the user end, and the exchanged refrigerant flows to the first end of the first heat exchange branch 5 and the first end of the main pipeline 8 after passing through the economizer 11. The refrigerant entering the first heat exchange branch 5 flows to the first heat exchanger 18 along the first heat exchange branch 5 through the third three-way reversing valve, and the water heated by the ground buried pipe 41 exchanges heat with the refrigerant in the first heat exchange branch 5 through the first heat exchanger 18 to transfer heat to the refrigerant in the first heat exchange branch 5 to increase the temperature of the refrigerant in the first heat exchange branch 5. The heated refrigerant flows to the first three-way reversing valve 7 through the second three-way reversing valve 13, and then flows to the first heat exchanger 2 through the first three-way reversing valve 7; at the same time, the refrigerant entering the main pipeline 8 flows to the first heat exchanger 2 through the third control valve 19, and then the refrigerant passing through the first heat exchanger 2 flows to the second end B of the four-way reversing valve 9 and the third end C of the four-way reversing valve 9 in turn to flow to the gas-liquid separator 23, and then the refrigerant processed by the gas-liquid separator 23 flows to the suction port of the compressor 1. Among them, the water in the third pipeline 44 after heat exchange will have residual temperature, which will heat the water in the water tank 42.

[0070] The fifth operating mode: when the heat pump system is in heating mode, the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value (i.e. the outdoor is in the condition of medium radiation in medium temperature), the first control valve 12 is in the connected state, the second control valve 17 is in the disconnected state, and the fourth control valve 21 is in the disconnected state. And the solar energy collector 31 absorbs solar radiation, and the heat converted by the solar radiation is transferred to the heat transfer medium, the heat transfer medium carrying heat flows out through the output end of the solar energy collector 31 and flows into the fourth pipeline 32, and the heat transfer medium carrying heat exchanges heat with the water in the second pipeline 43 through the second heat exchanger 22. The water in the second pipeline 43 absorbs heat and flows into the ground buried pipe 41, and then the ground buried pipe 41 releases heat to further heat the water. The water heated by the ground buried pipe 41 flows into the third pipeline 44.

[0071] Meanwhile, the refrigerant flowing out of the discharge port of the compressor 1 flows through the oil separator 20, the first end A of the four-way reversing valve 9 and the fourth end D of the four-way reversing valve 9 to the second heat exchanger 10, the refrigerant entering the second heat exchanger 10 exchanges heat with the user end, and the exchanged refrigerant enters the economizer 11, part of the refrigerant sequentially passes through the first control valve 12 and the enthalpy increasing branch 6, and enters the medium pressure cavity of the compressor 1. Another part of the refrigerant flows to the first end of the first heat exchange branch 5 and the first end of the main pipeline 8 respectively; the refrigerant entering the first heat exchange branch 5 flows along the first heat exchange branch 5 through the third three-way reversing valve to the first heat exchanger 18, and the water heated by the buried pipe 41 exchanges heat with the refrigerant in the first heat exchange branch 5 through the first heat exchanger 18, so as to transfer heat to the refrigerant in the first heat exchange branch 5, so as to increase the temperature of the refrigerant in the first heat exchange branch 5. The heated refrigerant flows to the first three-way reversing valve 7 through the second three-way reversing valve 13, and then flows to the enthalpy increasing branch 6 and the medium pressure cavity of the compressor 1 through the first three-way reversing valve 7 in sequence. At the same time, the refrigerant entering the main pipeline 8 flows to the first heat exchanger 2 through the third control valve 19, and then the refrigerant passing through the first heat exchanger 2 flows to the second end B of the four-way reversing valve 9 and the third end C of the four-way reversing valve 9 to the gas-liquid separator 23, and then the refrigerant processed by the gas-liquid separator 23 flows to the suction port of the compressor 1. Among them, the water in the third pipeline 44 after heat exchange will have residual temperature, which will heat the water in the water tank 42.

[0072] The sixth operating mode: when the heat pump system is in the cooling mode, the outdoor temperature is greater than the third preset temperature value, and the solar radiation value is greater than the third preset radiation value (that is, the outdoor is in the condition of high ambient temperature and strong radiation), the first control valve 12 is in the open state, the second control valve 17 is in the connected state, and the fourth control valve 21 is in the connected state.

[0073] The refrigerant flowing out of the discharge port of the compressor 1 flows through the oil separator 20, the first end A of the four-way reversing valve 9 and the second end B of the four-way reversing valve 9 to the first heat exchanger 2 and the second control valve 17 respectively.

[0074] The refrigerant entering into the first heat exchanger 2 releases heat in the first heat exchanger 2, and then flows to the second end of the main pipeline 8 through the first heat exchanger 2. At the same time, the refrigerant entering into the second heat exchange branch 14 flows to the first heat exchange branch 5 through the second three-way valve 13, and then flows to the first heat exchanger 18 through the first heat exchange branch 5. At this time, the water in the third pipeline 44 exchanges heat with the refrigerant in the first heat exchange branch 5 through the first heat exchanger 18, the refrigerant in the first heat exchange branch 5 transfers heat to the water in the third pipeline 44, and the water in the third pipeline 44 is heated and then flows to the water tank 42. The water in the water tank 42 is heated and can be provided to the user for use. The refrigerant in the first heat exchange branch 5 flows into the main pipeline 8 through the third three-way valve 15 and the fourth control valve 21 in sequence after heat exchange, and then mixes with the refrigerant flowing out of the first heat exchanger 2. The mixed refrigerant flows to the second heat exchanger 10 through the third control valve 19, the second end of the main pipeline 8 and the economizer 11 in sequence. The refrigerant entering into the second heat exchanger 10 exchanges heat with the user end, and then flows to the gas-liquid separator 23 through the fourth end D of the four-way valve 9 and the third end C of the four-way valve 9. The refrigerant processed by the gas-liquid separator 23 flows to the suction port of the compressor 1.

[0075] At the same time, the solar collector 31 absorbs solar radiation and transfers the heat converted from the solar radiation to the heat transfer medium. The heat-carrying heat transfer medium flows out of the solar collector 31 through the output end and then flows into the fourth pipeline 32. The heat-carrying heat transfer medium exchanges heat with the water in the second pipeline 43 through the second heat exchanger 22. At this time, the water in the second pipeline 43 is heated in the first heat exchanger 18. The water in the second pipeline 43 absorbs heat and then flows into the ground heat exchanger 41. The ground heat exchanger 41 absorbs the heat carried by the water and stores the absorbed heat in the stratum. The water absorbing heat in the ground heat exchanger 41 flows into the water tank 42 through the third pipeline 44.

[0076] It should be noted that the terms "first", "second", and the like in the description and claims of the application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged, so that the embodiments of the application described herein can be implemented in other than the order depicted or described herein. Furthermore, the terms "comprise" and "have", and any variations thereof, are intended to cover not exclusively containing, for example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to the clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0077] Optionally, the specific examples in the embodiments can refer to the examples described in the above embodiments, and the embodiments will not be described here again.

[0078] The serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0079] In the above embodiments of the present application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0080] The above is only the preferred embodiment of the present application, and it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A multi-heat source heat pump system, comprising: The compressor (1) and the first heat exchanger (2), the compressor (1) is connected with the first heat exchanger (2), and the first heat exchanger (2) is used for heat exchange with outdoor air, characterized in that the heat pump system further comprises: The solar circulation loop (3) and the storage circulation loop (4), the solar circulation loop (3) is used for absorbing the heat of the sun, the solar circulation loop (3) is heat exchange connected with the storage circulation loop (4), and the storage circulation loop (4) is used for storing heat exchanged with the solar circulation loop (3) in the stratum or releasing heat; The first heat exchange branch (5), the first end of the first heat exchange branch (5) is connected with the compressor (1), the second end of the first heat exchange branch (5) is connected with one end of the first heat exchanger (2) in an openable and closable manner, and the first heat exchange branch (5) is heat exchange connected with the storage circulation loop (4); When the heat pump system is in a heating mode, and the outdoor temperature is less than a first preset temperature value, and the solar radiation value is less than a first preset radiation value, the second end of the first heat exchange branch (5) is connected with one end of the first heat exchanger (2), the storage circulation loop (4) releases heat, and the storage circulation loop (4) exchanges heat with refrigerant in the first heat exchange branch (5), so that the refrigerant in the first heat exchange branch (5) absorbs the heat released by the storage circulation loop (4); the heat-absorbed refrigerant in the first heat exchange branch (5) flows to the first heat exchanger (2) through the second end of the first heat exchange branch (5).

2. The heat pump system of claim 1, wherein, The heat pump system further comprises: The enthalpy increasing branch (6), the enthalpy increasing branch (6) is connected with the exhaust port of the compressor (1) and the medium-pressure cavity of the compressor (1) respectively, and the second end of the first heat exchange branch (5) is connected with the enthalpy increasing branch (6) in an openable and closable manner; When the heat pump system is in a heating mode, the outdoor temperature is greater than or equal to a first preset temperature value and less than a second preset temperature value, and the solar radiation value is greater than or equal to a first preset radiation value and less than a second preset radiation value, the second end of the first heat exchange branch (5) is disconnected with one end of the first heat exchanger (2), the second end of the first heat exchange branch (5) is connected with the enthalpy increasing branch (6), the storage circulation loop (4) releases heat, and the storage circulation loop (4) exchanges heat with refrigerant in the first heat exchange branch (5), so that the refrigerant in the first heat exchange branch (5) absorbs the heat released by the storage circulation loop (4); the heat-absorbed refrigerant in the first heat exchange branch (5) flows to the enthalpy increasing branch (6) through the second end of the first heat exchange branch (5); the first preset temperature value is less than the second preset temperature value, and the first preset radiation value is less than the second preset radiation value.

3. The heat pump system of claim 2, wherein, The heat pump system further comprises: a first three-way reversing valve (7) connected with the second end of the first heat exchange branch (5), one end of the first heat exchanger (2) close to the second end of the first heat exchange branch (5) and the enthalpy increasing branch (6) respectively; the first three-way reversing valve (7) is used for controlling the flow path of the refrigerant in the first heat exchange branch (5); When the heat pump system is in the heating mode, and the outdoor temperature is less than the first preset temperature value, and the solar radiation value is less than the first preset radiation value, the first three-way reversing valve (7) connects the second end of the first heat exchange branch (5) with one end of the first heat exchanger (2), so that the refrigerant in the first heat exchange branch (5) flows into the first heat exchanger (2); when the heat pump system is in the heating mode, the outdoor temperature is greater than or equal to the first preset temperature value and less than the second preset temperature value, and the solar radiation value is greater than or equal to the first preset radiation value and less than the second preset radiation value, the first three-way reversing valve (7) connects the second end of the first heat exchange branch (5) with the enthalpy increasing branch (6), so that the refrigerant in the first heat exchange branch (5) flows into the enthalpy increasing branch (6).

4. The heat pump system of claim 1, wherein, The heat pump system further comprises: A main pipeline (8) connected with the first end of the compressor (1), and connected with one end of the first heat exchanger (2) close to the first heat exchange branch (5); the main pipeline (8) is arranged in parallel with the first heat exchange branch (5); A four-way reversing valve (9) connected with the exhaust port of the compressor (1) through the first end A, connected with one end of the first heat exchanger (2) away from the first heat exchange branch (5) through the second end B, connected with the suction port of the compressor (1) through the third end C, and connected with the first end of the main pipeline (8) and the first end of the first heat exchange branch (5) through the fourth end D; When the heat pump system is in the heating mode, the exhaust port of the compressor (1) is connected with the first end of the main pipeline (8) and the first end of the first heat exchange branch (5) through the four-way reversing valve (9), so that the refrigerant output from the exhaust port of the compressor (1) flows into the first heat exchange branch (5) and the main pipeline (8) respectively.

5. The heat pump system of claim 4, wherein, The heat pump system further comprises: a second heat exchanger (10) connected with the fourth end D of the four-way reversing valve (9) through the first end, and connected with the first end of the main pipeline (8) and the first end of the first heat exchange branch (5) through the second end; the second heat exchanger (10) is used for heat exchange with the user end.

6. The heat pump system of claim 5, wherein, The heat pump system further comprises: An economizer (11), a first end of the economizer (11) is connected with a second end of the second heat exchanger (10), a second end of the economizer (11) is connected with a first end of the main pipeline (8) and a first end of the first heat exchange branch (5) respectively; An enthalpy increasing branch (6), a first end of the enthalpy increasing branch (6) is connected with a third end of the economizer (11), a second end of the enthalpy increasing branch (6) is connected with a medium pressure cavity of the compressor (1); A first control valve (12), the first control valve (12) is arranged on the economizer (11), the first control valve (12) is used for controlling the on-off of the economizer (11) and the enthalpy increasing branch (6); When the heat pump system performs the enthalpy increasing control, the first control valve (12) is opened, so that the refrigerant flowing out of the second heat exchanger (10) flows out of the second end of the economizer (11) and the third end of the economizer (11) respectively.

7. The heat pump system of claim 4, wherein, The heat pump system further comprises: A second three-way reversing valve (13), the second three-way reversing valve (13) is arranged on the first heat exchange branch (5), and the second three-way reversing valve (13) is located at one end of the first heat exchange branch (5) close to the first heat exchanger (2); a first end of the second three-way reversing valve (13) and a second end of the second three-way reversing valve (13) are connected with the first heat exchange branch (5) respectively; A second heat exchange branch (14), a first end of the second heat exchange branch (14) is connected with a second end B of the four-way reversing valve (9) in an on-off manner, a second end of the second heat exchange branch (14) is connected with a third end of the second three-way reversing valve (13); When the heat pump system is in the refrigeration mode, the outdoor temperature is greater than a third preset temperature value, and the solar radiation value is greater than a third preset radiation value, the first end of the second heat exchange branch (14) is connected with the second end B of the four-way reversing valve (9), the second three-way reversing valve (13) is used for connecting the second end of the second heat exchange branch (14) with the first heat exchange branch (5); at least part of the refrigerant flowing out of the exhaust port of the compressor (1) flows to the first heat exchanger (2) through the four-way reversing valve (9) and the second heat exchange branch (14), the refrigerant flowing into the first heat exchanger (2) exchanges heat with the storage circulation loop (4), and the refrigerant in the first heat exchanger (2) transmits heat to the storage circulation loop (4); the first preset temperature value is less than the third preset temperature value, and the first preset radiation value is less than the third preset radiation value.

8. The heat pump system of claim 7, wherein, The heat pump system further comprises: A third three-way reversing valve (15) is arranged on the first heat exchange branch (5), and the third three-way reversing valve (15) is located between the second three-way reversing valve (13) and the first end of the first heat exchange branch (5); the first end of the third three-way reversing valve (15) and the second end of the third three-way reversing valve (15) are connected with the first heat exchange branch (5) respectively; A first pipeline (16) is connected with the third end of the third three-way reversing valve (15) at one end, and connected with the main pipeline (8) at the other end; When the heat pump system is in the refrigeration mode, the outdoor temperature is greater than a third preset temperature value, and the solar radiation value is greater than a third preset radiation value, the third three-way reversing valve (15) is used to communicate the first heat exchange branch (5) with the first pipeline (16), and the refrigerant after heat exchange in the first heat exchange branch (5) flows to the main pipeline (8) through the first pipeline (16).

9. The heat pump system of claim 7, wherein, The heat pump system further comprises a second control valve (17) connected with the first end of the second heat exchange branch (14) and the second end B of the four-way reversing valve (9) respectively, and the second control valve (17) is used to control the on-off between the first end of the second heat exchange branch (14) and the second end B of the four-way reversing valve (9); the second control valve (17) is arranged in parallel with the first heat exchanger (2); When the heat pump system is in the refrigeration mode, the outdoor temperature is greater than a third preset temperature value, and the solar radiation value is greater than a third preset radiation value, the second control valve (17) is used to connect the first end of the second heat exchange branch (14) with the second end B of the four-way reversing valve (9).

10. The heat pump system of claim 1, wherein, The storage circulation loop (4) comprises: A ground heat exchanger (41) arranged in the ground layer, and used to store or release heat in the ground layer; A water tank (42) with a water outlet connected with the water inlet of the ground heat exchanger (41) through a second pipeline (43), and a water return connected with the water outlet of the ground heat exchanger (41) through a third pipeline (44); the water flowing out of the water tank (42) is used for heat exchange with the solar circulation loop (3), and the water after absorbing heat flows into the ground heat exchanger (41), the ground heat exchanger (41) is used to absorb the heat of the water or release heat to heat the water, and the processed water of the ground heat exchanger (41) flows out through the water outlet of the ground heat exchanger (41); When the storage circulation loop (4) has a storage state and a release state, when the storage circulation loop (4) is in the storage state, after the water, which is heat-exchanged by the storage circulation loop (4) and the solar circulation loop (3), flows into the ground pipe (41), the ground pipe (41) absorbs the heat of the water to store the absorbed heat in the stratum; when the storage circulation loop (4) is in the release state, after the water, which is heat-exchanged by the storage circulation loop (4) and the solar circulation loop (3), flows into the ground pipe (41), the ground pipe (41) releases heat to heat the water, and the heated water flows out of the ground pipe (41).

11. The heat pump system according to claim 10, wherein, The heat pump system further comprises a first heat exchanger (18), the first heat exchange branch (5) and the third pipeline (44) both pass through the first heat exchanger (18); the third pipeline (44) is connected in heat exchange with the first heat exchange branch (5) through the first heat exchanger (18); and / or, The storage circulation loop (4) further comprises a first circulation pump (45), the first circulation pump (45) is connected with the water outlet end of the ground pipe (41) and the third pipeline (44) respectively.

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