Heat pump and heat storage integrated unit and heat supply system

Abstract

The utility model relates to the technical field of unit equipment, and provides a heat pump and heat storage integrated unit and a heat supply system.The heat pump and heat storage integrated unit comprises a heat pump circulation loop, a chilled water conveying pipeline and an electric heat storage system.The heat pump circulation loop is provided with a first heat exchanger, and the chilled water conveying pipeline communicates with the first heat exchanger; a second heat exchanger is arranged on the chilled water conveying pipeline in a communicating mode, and the second heat exchanger is located behind the first heat exchanger in the conveying direction of chilled water. The electric heat storage system comprises an electric heat storage block, and heat interaction is formed between the second heat exchanger and the electric heat storage block. According to the scheme, through operation of the heat pump circulation loop and the electric heat storage system, the chilled water in the chilled water conveying pipeline can be heated, and then the application benefits of the unit and the system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of unit equipment, and in particular to a heat pump and heat storage integrated unit and a heating system. Background Art

[0002] At present, the operating performance of most heat pump units is not very stable when the ambient temperature is low. The heating capacity is greatly affected by the ambient temperature. The lower the ambient temperature, the less heating capacity there is. In addition, it is difficult to achieve a high outlet water temperature, which affects the user experience. In order to achieve the preset heating capacity, it is usually necessary to increase energy consumption, but this also results in higher operating costs. Utility Model Content

[0003] In order to overcome at least one disadvantage of the above-mentioned prior art, the purpose of the present application is to provide a heat pump and heat storage integrated unit and a heating system.

[0004] The technical means adopted by this application to solve the above technical problems are:

[0005] On the one hand, the embodiment of the present application provides a heat pump and heat storage integrated unit, including:

[0006] A heat pump circulation loop, wherein a first heat exchanger is provided on the heat pump circulation loop;

[0007] A chilled water delivery pipeline, the chilled water delivery pipeline is in communication with the first heat exchanger, a second heat exchanger is provided in communication with the chilled water delivery pipeline, and the second heat exchanger is located behind the first heat exchanger along the delivery direction of the chilled water;

[0008] The electric heat storage system comprises an electric heat storage block, and thermal interaction is formed between the second heat exchanger and the electric heat storage block.

[0009] In the embodiment scheme of the present application, by setting up the first heat exchanger, it is possible to facilitate thermal interaction between the chilled water delivery pipeline and the heat pump circulation loop, so that the chilled water in the chilled water delivery pipeline can be cooled or heated through the operation of the heat pump circulation loop; by setting up the second heat exchanger, it is possible to facilitate thermal interaction between the chilled water delivery pipeline and the electric heat storage system, so that peak and valley electricity prices can be better utilized for heat storage, thereby improving the heating effect of the chilled water in the chilled water delivery pipeline, and thus improving the application benefits.

[0010] In some embodiments, a first branch pipeline is provided between an input end and an output end of the chilled water delivery pipeline communicating with the second heat exchanger, and a first control valve is provided on the first branch pipeline.

[0011] In the embodiment of the present application, the delivery direction of the chilled water in the chilled water delivery pipeline can be controlled by providing the first branch pipeline and the first control valve.

[0012] In some embodiments, a second branch pipeline is provided between the input end and the output end of the chilled water delivery pipeline communicating with the first heat exchanger, and a second control valve is provided on the second branch pipeline.

[0013] In the embodiment of the present application, the second branch pipeline and the second control valve can also be used to control the delivery direction of the chilled water in the chilled water delivery pipeline.

[0014] In some embodiments, the electric heat storage system includes a heat exchange chamber, and the electric heat storage block and the second heat exchanger are arranged in the heat exchange chamber;

[0015] A hot air blower is arranged in the heat exchange cavity.

[0016] In the embodiment of the present application, the heat exchange chamber and the hot air blower are provided to improve the thermal interaction efficiency between the second heat exchanger and the electric heat storage block.

[0017] In some embodiments, the heat pump circulation loop is further connected with a compressor, a four-way valve and a condenser, and the four-way valve includes a first connection mode and a second connection mode;

[0018] When in the first connection mode, the refrigerant flows through the compressor, the four-way valve, the condenser, the first heat exchanger, the four-way valve, and the compressor in sequence;

[0019] When in the second connection mode, the refrigerant flows through the compressor, the four-way valve, the first heat exchanger, the condenser, the four-way valve, and the compressor in sequence.

[0020] In the embodiment of the present application, by forming the first connection mode and the second connection mode on the heat pump circulation loop, it is possible to facilitate the application effects of cooling and heating in the heat pump circulation loop.

[0021] In some embodiments, an oil separator is provided between the output end of the compressor and the four-way valve.

[0022] In the embodiment of the present application, the oil separator is provided to separate the oil from the gaseous refrigerant discharged from the compressor end, thereby improving the safety of system operation.

[0023] In some embodiments, a gas-liquid separator is provided between the input end of the compressor and the four-way valve.

[0024] In the embodiment of the present application, by providing the gas-liquid separator, it is possible to separate the pure gaseous refrigerant, thereby improving the protection of the compressor.

[0025] In some embodiments, the heat pump circulation loop is further provided with a circulation branch, and the circulation branch is sequentially connected with a liquid reservoir and an expansion valve;

[0026] The input end of the circulation branch is respectively connected to the first heat exchanger and the condenser;

[0027] The output end of the circulation branch is communicated with the first heat exchanger and the condenser respectively.

[0028] In the embodiment of the present application, by setting the circulation branch, it is easy to adapt to the first connection mode and the second connection mode, so as to realize the cooling function and the heating function.

[0029] In some embodiments, a first communication branch and a second communication branch are provided between the first heat exchanger and the condenser;

[0030] The first connecting branch is provided with a first one-way valve and a second one-way valve, and the input end of the circulation branch is connected and arranged between the first one-way valve and the second one-way valve;

[0031] The second connecting branch is provided with a third one-way valve and a fourth one-way valve, and the output end of the circulation branch is connected and arranged between the third one-way valve and the fourth one-way valve.

[0032] In the embodiment of the present application, by controlling the first one-way valve, the second one-way valve, the third one-way valve and the fourth one-way valve, it is possible to easily control the flow direction of the refrigerant in the heat pump circulation loop.

[0033] On the other hand, an embodiment of the present application provides a heating system, which is provided with the heat pump and heat storage integrated unit as described above.

[0034] In the embodiment scheme of the present application, by applying the heat pump and heat storage integrated unit as described above in the heating system, the heating system can have a refrigeration function; moreover, when performing heating operations in a low-temperature environment, the application stability of the system can be better, and it can also be convenient to utilize peak and valley electricity prices, reduce operating costs, and heat the chilled water through the stored thermal energy to increase the outlet water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a circuit diagram of a heat pump and heat storage integrated unit according to one example of the present application.

[0037] Figure 2 This is a schematic diagram of the unit circuit in the cooling mode of this application.

[0038] Figure 3 This is a schematic diagram of the unit circuit in the heating + heat storage mode of this application.

[0039] Figure 4 This is a schematic diagram of the unit circuit in the heating + heat release mode of this application.

[0040] Marking Description:

[0041] 1-heat pump circulation loop, 11-first heat exchanger, 12-compressor, 13-four-way valve, 14-condenser, 15-oil separator, 16-gas-liquid separator, 17-circulation branch, 171-liquid reservoir, 172-expansion valve, 18-first communication branch, 181-first check valve, 182-second check valve, 19-second communication branch, 191-third check valve, 192-fourth check valve;

[0042] 2-chilled water delivery pipeline, 21-second heat exchanger, 22-first branch pipeline, 221-first control valve, 23-second branch pipeline, 231-second control valve;

[0043] 3-electric heat storage system, 31-electric heat storage block, 32-heat exchange chamber, 33-hot air blower. DETAILED DESCRIPTION

[0044] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present invention.

[0045] It should be noted that: unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] like Figure 1-4 As shown, the present embodiment provides a heat pump and heat storage integrated unit, including a heat pump circulation loop 1, a chilled water delivery pipeline 2 and an electric heat storage system 3; wherein the heat pump circulation loop 1 can be used for a cooling or heating cycle of a refrigerant or other refrigerant, the chilled water delivery pipeline 2 can be used for the circulation and delivery of chilled water, and the electric heat storage system 3 can be used to convert electrical energy into thermal energy and store the thermal energy.

[0047] In some embodiments, a first heat exchanger 11 is provided on the heat pump circulation loop 1, and the chilled water delivery pipeline 2 is connected to the first heat exchanger 11, so that thermal interaction between the chilled water in the chilled water delivery pipeline 2 and the refrigerant in the heat pump circulation loop 1 can be achieved in the first heat exchanger 11.

[0048] In some embodiments, the first heat exchanger 11 can be configured as a tubular heat exchanger.

[0049] In some embodiments, a second heat exchanger 21 is provided on the chilled water delivery pipeline 2, the electric heat storage system 3 includes an electric heat storage block 31, and thermal interaction is formed between the second heat exchanger 21 and the electric heat storage block 31; and, along the delivery direction of the chilled water in the chilled water delivery pipeline 2, the second heat exchanger 21 is located behind the first heat exchanger 11.

[0050] In some embodiments, the second heat exchanger 21 can be configured as a water-to-air heat exchanger.

[0051] By setting the first heat exchanger 11, it is possible to facilitate thermal interaction between the chilled water delivery pipeline 2 and the heat pump circulation loop 1, so that the chilled water in the chilled water delivery pipeline 2 can be cooled or heated through the operation of the heat pump circulation loop 1.

[0052] By setting up the second heat exchanger 21, it is easy to realize thermal interaction between the chilled water delivery pipeline 2 and the electric heat storage system 3; when in use, the electrical energy can be converted into thermal energy when the electricity price is low at night, and the stored thermal energy can be used to heat the chilled water. The method of using the peak and valley electricity prices to store heat and heat the chilled water can effectively reduce the operating cost of the system and improve the heating effect of the chilled water in the chilled water delivery pipeline 2 to achieve a higher water outlet temperature, improve user satisfaction, and thus improve the application benefits of the unit and the system.

[0053] As one application example, a first branch pipeline 22 is provided between the input end and the output end of the chilled water delivery pipeline 2 communicating with the second heat exchanger 21 , and a first control valve 221 is provided on the first branch pipeline 22 .

[0054] In some embodiments, the first control valve 221 can be configured as an electric butterfly valve.

[0055] The first branch line 22 and the first control valve 221 can be used to control the delivery direction of the chilled water in the chilled water delivery pipeline 2. For example, when the first control valve 221 is in a closed state, the chilled water enters from the input end of the chilled water delivery pipeline 2, and after flowing through the second heat exchanger 21, is output from the output end of the chilled water delivery pipeline; and when the first control valve 221 is in an open state, the chilled water does not pass through the second heat exchanger 21, but directly flows in the chilled water delivery pipeline 2.

[0056] As one application example, a second branch pipeline 23 is provided between the input end and the output end of the chilled water delivery pipeline 2 communicating with the first heat exchanger 11 , and a second control valve 231 is provided on the second branch pipeline 23 .

[0057] In some embodiments, the second control valve 231 may also be configured as an electric butterfly valve.

[0058] The second branch line 23 and the second control valve 231 can be used to control the delivery direction of the chilled water in the chilled water delivery pipeline 2. For example, when the second control valve 231 is in a closed state, the chilled water enters from the input end of the chilled water delivery pipeline 2 and is output after passing through the first heat exchanger 11; and when the second control valve 231 is in an open state, the chilled water does not pass through the first heat exchanger 11, but directly flows in the chilled water delivery pipeline 2.

[0059] By jointly controlling the first control valve 221 and the second control valve 231, the delivery direction of the chilled water in the chilled water delivery pipeline 2 can be better controlled; for example:

[0060] When the first control valve 221 and the second control valve 231 are both in the open state, the chilled water enters from the input end of the chilled water delivery pipeline 2 and is directly output from the output end;

[0061] When the first control valve 221 is in an open state and the second control valve 231 is in a closed state, the chilled water enters from the input end of the chilled water delivery pipeline 2, and after flowing through the first heat exchanger 11, is directly output from the output end of the chilled water delivery pipeline 2;

[0062] When the first control valve 221 is in a closed state and the second control valve 231 is in an open state, the chilled water enters from the input end of the chilled water delivery pipeline 2, does not flow through the first heat exchanger 11, but flows through the second heat exchanger 21, and then is output from the output end of the chilled water delivery pipeline 2;

[0063] When the first control valve 221 and the second control valve 231 are both in the closed state, the chilled water enters from the input end of the chilled water delivery pipeline 2, and flows through the first heat exchanger 11 and the second heat exchanger 21 in sequence, and then is output from the output end of the chilled water delivery pipeline 2.

[0064] As one application example, the electric heat storage system 3 further includes a heat exchange chamber 32 , the electric heat storage block 31 and the second heat exchanger 21 are arranged in the heat exchange chamber 32 , and a hot air blower 33 is also arranged in the heat exchange chamber 32 .

[0065] By setting the electric heat storage block 31, it is convenient to utilize electric energy to generate heat and store the thermal energy; and by setting the heat exchange chamber 32, it can be used to provide a thermal interaction space so as to realize the thermal interaction between the second heat exchanger 21 and the electric heat storage block 31; and by setting the hot air blower 33, it can be used to promote the circulation of heat in the heat exchange chamber 32 so as to improve the thermal interaction efficiency between the second heat exchanger 21 and the electric heat storage block 31.

[0066] As an application example, a compressor 12, a four-way valve 13 and a condenser 14 are also connected to the heat pump circulation loop 1, and the four-way valve 13 includes a first connection mode and a second connection mode in application.

[0067] In some embodiments, when the four-way valve 13 is in the first connection mode, the refrigerant flows through the compressor 12, the four-way valve 13, the condenser 14, the first heat exchanger 11, the four-way valve 13, and the compressor 12 in sequence, thereby forming a cycle.

[0068] In some embodiments, when the four-way valve 13 is in the second connection mode, the refrigerant flows through the compressor 12, the four-way valve 13, the first heat exchanger 11, the condenser 14, the four-way valve 13, and the compressor 12 in sequence, thereby forming a cycle.

[0069] In some embodiments, an oil separator 15 is provided between the output end of the compressor 12 and the four-way valve 13. The oil separator 15 can be used to separate the oil from the gaseous refrigerant discharged from the compressor 12, thereby facilitating improving the safety of system operation.

[0070] In some embodiments, a gas-liquid separator 16 is provided between the input end of the compressor 12 and the four-way valve 13 . The gas-liquid separator 16 can be used to separate pure gaseous refrigerant, thereby improving the protection of the compressor 12 .

[0071] As one application example, a circulation branch 17 is also provided on the heat pump circulation loop 1, and a liquid reservoir 171 and an expansion valve 172 are sequentially connected to the circulation branch 17; and, the input end of the circulation branch 17 is respectively connected to the first heat exchanger 11 and the condenser 14, and the output end of the circulation branch 17 is also respectively connected to the first heat exchanger 11 and the condenser 14.

[0072] In some embodiments, a first connecting branch 18 and a second connecting branch 19 are provided between the first heat exchanger 11 and the condenser 14 ; a first one-way valve 181 and a second one-way valve 182 are provided on the first connecting branch 18 , and a third one-way valve 191 and a fourth one-way valve 192 are provided on the second connecting branch 19 .

[0073] The output end of the first one-way valve 181 is connected to the output end of the second one-way valve 182, and the input end of the circulation branch 17 is connected and arranged between the first one-way valve 181 and the second one-way valve 182. The input end of the third one-way valve 191 is connected to the input end of the fourth one-way valve 192, and the output end of the circulation branch 17 is connected and arranged between the third one-way valve 191 and the fourth one-way valve 192.

[0074] By controlling the first one-way valve 181 , the second one-way valve 182 , the third one-way valve 191 and the fourth one-way valve 192 , it is possible to easily control the flow direction of the refrigerant in the heat pump circulation loop 1 .

[0075] At this point, there are three operating modes in the unit: cooling mode, heating + heat storage mode, and heating + heat release mode:

[0076] When in cooling mode, in the heat pump circulation loop 1, high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, enters the four-way valve 13 after passing through the oil separator 15, and then condenses into high-temperature and high-pressure liquid refrigerant in the condenser 14 after passing through the four-way valve 13, and then becomes low-temperature and low-pressure liquid refrigerant after passing through the first one-way valve 181, the liquid storage tank 171, and the expansion valve 172. The low-temperature and low-pressure liquid refrigerant passes through the fourth one-way valve 192 and enters the first heat exchanger 11 to absorb heat and become a gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant passes through the four-way valve 13 and the gas-liquid separator 16, and finally returns to the compressor 12 to complete a cycle. At this time, the high-temperature chilled water becomes low-temperature chilled water after passing through the first heat exchanger 11. At this time, the first control valve 221 is in an open state, and the electric heat storage system 3 does not work. Figure 2 As shown;

[0077] When in the heating + heat storage mode, in the heat pump circulation loop 1, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, passes through the oil separator 15, and then passes through the four-way valve 13, and is condensed into a high-temperature and high-pressure liquid refrigerant in the first heat exchanger 11, and then passes through the second one-way valve 182, the liquid storage tank 171, and the expansion valve 172 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant passes through the third one-way valve 191 to the condenser 14 to absorb heat and become a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant passes through the four-way valve 13 and the gas-liquid separator 16, and finally returns to the compressor 12 to complete a cycle. The low-temperature chilled water passes through the first heat exchanger 11 to become high-temperature chilled water. At this time, the first control valve 221 is in an open state, and in the electric heat storage system 3, the electric heat storage block 31 is heated to a high temperature of 600-800°C by the electric heating principle, while the second heat exchanger 21 and the hot air blower 33 are in an inoperative state. Figure 3 As shown;

[0078] When in the heating + heat release mode, in the heat pump circulation loop 1, the high-temperature and high-pressure gaseous refrigerant is discharged from the compressor 12, passes through the oil separator 15, and then passes through the four-way valve 13 to be condensed into a high-temperature and high-pressure liquid refrigerant in the first heat exchanger 11, and then passes through the second one-way valve 182, the liquid storage tank 171, and the expansion valve 172 to become a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant passes through the third one-way valve 191 to the condenser 14 to absorb heat and become a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant passes through the four-way valve 13 and the gas-liquid separator 16, and finally returns to the compressor 12 to complete a cycle. At this time, the low-temperature chilled water passes through the first heat exchanger 11 and becomes medium-temperature chilled water; the first control valve 221 is in a closed state, and in the electric heat storage system 3, the hot air blower 33 is started, and the pressurized air passes through the electric heat storage block 31 and is heated to a high temperature. The high-temperature air passes through the second heat exchanger 21 and heats the medium-temperature chilled water to high-temperature chilled water, and the maximum temperature can reach 80°C (the specific temperature can be set according to demand). Figure 4 shown.

[0079] On the other hand, the present embodiment also provides a heating system, in which the heat pump and heat storage integrated unit as described above are arranged.

[0080] By applying the heat pump and heat storage integrated unit as described above in the heating system, the heating system can have a refrigeration function; moreover, when performing heating operations in a low-temperature environment, the application stability of the system can be better, and it can also be convenient to utilize peak and valley electricity prices to reduce operating costs. By heating the chilled water through the stored heat energy, the outlet water temperature can be increased.

[0081] The above description is only a specific implementation mode of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should also be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

[0082] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A heat pump and heat storage integrated unit, characterized in that: include: A heat pump circulation loop, wherein a first heat exchanger is provided on the heat pump circulation loop; A chilled water delivery pipeline, the chilled water delivery pipeline is in communication with the first heat exchanger, a second heat exchanger is provided in communication with the chilled water delivery pipeline, and the second heat exchanger is located behind the first heat exchanger along the delivery direction of the chilled water; The electric heat storage system comprises an electric heat storage block, and thermal interaction is formed between the second heat exchanger and the electric heat storage block.

2. The heat pump and heat storage integrated unit according to claim 1, characterized in that: A first branch pipeline is arranged between the input end and the output end of the chilled water delivery pipeline communicating with the second heat exchanger, and a first control valve is arranged on the first branch pipeline.

3. The heat pump and heat storage integrated unit according to claim 2, characterized in that: A second branch pipeline is provided between the input end and the output end of the chilled water delivery pipeline communicating with the first heat exchanger, and a second control valve is provided on the second branch pipeline.

4. The heat pump and heat storage integrated unit according to any one of claims 1 to 3, characterized in that: The electric heat storage system comprises a heat exchange chamber, and the electric heat storage block and the second heat exchanger are arranged in the heat exchange chamber; A hot air blower is arranged in the heat exchange cavity.

5. The heat pump and heat storage integrated unit according to claim 4, characterized in that: The heat pump circulation loop is also connected with a compressor, a four-way valve and a condenser, and the four-way valve includes a first connection mode and a second connection mode; When in the first connection mode, the refrigerant flows through the compressor, the four-way valve, the condenser, the first heat exchanger, the four-way valve, and the compressor in sequence; When in the second connection mode, the refrigerant flows through the compressor, the four-way valve, the first heat exchanger, the condenser, the four-way valve, and the compressor in sequence.

6. The heat pump and heat storage integrated unit according to claim 5, characterized in that: An oil separator is provided between the output end of the compressor and the four-way valve.

7. The heat pump and heat storage integrated unit according to claim 6, characterized in that: A gas-liquid separator is provided between the input end of the compressor and the four-way valve.

8. The heat pump and heat storage integrated unit according to any one of claims 5 to 7, characterized in that: The heat pump circulation loop is also provided with a circulation branch, and the circulation branch is connected with a liquid storage device and an expansion valve in sequence; The input end of the circulation branch is respectively connected to the first heat exchanger and the condenser; The output end of the circulation branch is communicated with the first heat exchanger and the condenser respectively.

9. The heat pump and heat storage integrated unit according to claim 8, characterized in that: A first connecting branch and a second connecting branch are provided between the first heat exchanger and the condenser; The first connecting branch is provided with a first one-way valve and a second one-way valve, and the input end of the circulation branch is connected and arranged between the first one-way valve and the second one-way valve; The second connecting branch is provided with a third one-way valve and a fourth one-way valve, and the output end of the circulation branch is connected and arranged between the third one-way valve and the fourth one-way valve.

10. A heating system, characterized in that: A heat pump and heat storage integrated unit as described in any one of claims 1 to 9 is arranged therein.

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