Energy storage air conditioning system

Abstract

The utility model provides an energy storage air conditioning system. The energy storage air conditioning system comprises an outdoor unit module, an energy storage module, an indoor unit module, a liquid side header pipe, an air side header pipe and a low-pressure air pipe. The on-off state between the energy storage module and the pipeline is controlled, all functions of the energy storage module can still be achieved under the condition that only the liquid side header pipe, the gas side header pipe and the low-pressure gas pipe are arranged, the liquid side header pipe, the gas side header pipe and the low-pressure gas pipe are pipelines originally needed by a common outdoor unit, and therefore the energy storage module can still be used for energy storage. The outdoor unit does not need to be transformed, and the universality of the energy storage air conditioner is improved.

Description

Technical Field

[0001] The utility model relates to the field of energy storage air conditioning, in particular to an energy storage air conditioning system. Background Art

[0002] In order to achieve various operating modes, existing energy storage air conditioners generally need to connect the energy accumulator to the outdoor unit through 4 pipes. However, the number of pipes originally set in a general outdoor unit does not reach 4, so the outdoor unit needs to be modified. The versatility of the energy accumulator is low. In some methods, the number of pipes that need to be connected to the outdoor unit is reduced too much, resulting in the accumulator being unable to achieve all functions. Therefore, how to improve the versatility of the energy accumulator while ensuring its full functions is a problem that needs to be solved. Utility Model Content

[0003] The main purpose of the utility model is to provide an energy storage air conditioning system, aiming to solve the problem in the prior art of how to improve the versatility of the energy accumulator while ensuring all functions of the energy accumulator.

[0004] To achieve the above object, the utility model provides an energy storage air conditioning system, which includes an outdoor unit module, an energy storage module, an indoor unit module, a liquid side main pipe, a gas side main pipe and a low-pressure gas pipe; wherein:

[0005] The first end of the outdoor unit module is connected to the first end of the indoor unit module through the liquid side main pipe, and the second end of the outdoor unit module is connected to the second end of the indoor unit module through the gas side main pipe;

[0006] The first end of the energy storage module can be connected to the first end of the outdoor unit module through the liquid side main pipe, and the first end of the energy storage module can be connected to the second end of the outdoor unit module through the gas side main pipe;

[0007] The first end of the energy storage module is connected to the low-pressure end of the outdoor unit module through the low-pressure air pipe in an on-off manner;

[0008] The second end of the energy storage module can be connected to the first end of the outdoor unit module through the liquid side main pipe, and the second end of the energy storage module can be connected to the first end of the indoor unit module through the liquid side main pipe.

[0009] Optionally, the energy storage module includes an energy accumulator, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit and a heat release switch unit; wherein:

[0010] The first end of the accumulator is connected to the first end of the outdoor unit module through the first switch unit and the liquid side main pipe in sequence, and the first end of the accumulator is connected to the second end of the outdoor unit module through the second switch unit and the gas side main pipe in sequence;

[0011] The second end of the accumulator is connected to the first end of the outdoor unit module through the third switch unit and the liquid side main pipe in sequence, and the second end of the accumulator is connected to the first end of the indoor unit module through the fourth switch unit and the liquid side main pipe in sequence;

[0012] The first end of the accumulator is also connected to the low-pressure end of the outdoor unit module through the heat release switch unit and the low-pressure air pipe in sequence.

[0013] Optionally, the first switch unit includes a first solenoid valve and a first one-way valve, wherein:

[0014] The input end of the first one-way valve is connected to the first end of the outdoor unit module through the liquid side main pipe, and the output end of the first one-way valve is connected to the first end of the accumulator through the first solenoid valve.

[0015] Optionally, the second switch unit comprises a second solenoid valve, wherein:

[0016] The first end of the second solenoid valve is connected to the first end of the accumulator, and the second end of the second solenoid valve is connected to the second end of the outdoor unit module through the gas side main pipe.

[0017] Optionally, the heat release switch unit includes a heat release solenoid valve; a first end of the heat release solenoid valve is connected to a first end of the accumulator, and a second end of the heat release solenoid valve is connected to a low-pressure end of the outdoor unit module through the low-pressure gas pipe.

[0018] Optionally, the third switch unit includes a first electronic expansion valve, wherein:

[0019] The first end of the first electronic expansion valve is connected to the second end of the accumulator, and the second end of the first electronic expansion valve is connected to the first end of the outdoor unit module through the liquid side main pipe.

[0020] Optionally, a plurality of refrigerant pipes are provided in the accumulator, and the third switch unit includes a plurality of first electronic expansion valves, the number of the first electronic expansion valves is consistent with the number of the refrigerant pipes, and the first electronic expansion valves are connected to the refrigerant pipes in a one-to-one correspondence; wherein:

[0021] The first ends of the refrigerant pipes are connected to each other as the first ends of the accumulator;

[0022] The second end of each refrigerant pipe is connected to the first end of the corresponding first electronic expansion valve, and the second end of the first electronic expansion valve is connected to the first end of the outdoor unit module through the liquid side main pipe;

[0023] The second end of each of the refrigerant pipes is also connected to the first end of the indoor unit module through the fourth switch unit and the liquid side main pipe in sequence.

[0024] Optionally, the fourth switch unit includes a third solenoid valve and a second one-way valve, wherein:

[0025] The input end of the second one-way valve is connected to the second end of the accumulator, the output end of the second one-way valve is connected to the first end of the third solenoid valve, and the second end of the third solenoid valve is connected to the first end of the indoor unit module through the liquid side main pipe.

[0026] Optionally, the outdoor unit module includes a compressor, a vapor-liquid separator, a four-way valve, an outdoor heat exchanger, a subcooler, a second electronic expansion valve and a third electronic expansion valve; wherein:

[0027] The exhaust end of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to the first end through the outdoor heat exchanger, the second end of the outdoor heat exchanger is connected to the first end of the second electronic expansion valve, the second end of the second electronic expansion valve is connected to the first end of the first side of the subcooler through the third electronic expansion valve, the second end of the first side of the subcooler is connected to the third end of the four-way valve, and the first end of the second side of the subcooler is connected to the second end of the third electronic expansion valve; the third end of the four-way valve is also connected to the intake end of the compressor through the vapor-liquid separator;

[0028] The second end of the second side of the subcooler serves as the first end of the outdoor unit module, the fourth end of the four-way valve serves as the second end of the outdoor unit module, and the third end of the four-way valve serves as the low-pressure end of the outdoor unit module.

[0029] Optionally, the outdoor unit module further includes a low-pressure capillary tube and a low-pressure expansion valve; wherein:

[0030] The first end of the low-pressure capillary tube serves as the low-pressure end of the outdoor unit module, the second end of the low-pressure capillary tube is connected to the third end of the four-way valve, and the low-pressure expansion valve is connected in parallel with the low-pressure capillary tube.

[0031] Optionally, the indoor unit module includes an indoor heat exchanger and a fourth electronic expansion valve, characterized in that:

[0032] The first end of the fourth electronic expansion valve serves as the first end of the indoor unit module, the second end of the fourth electronic expansion valve is connected to the first end of the indoor heat exchanger, and the second end of the indoor heat exchanger serves as the second end of the indoor unit module.

[0033] Optionally, the energy storage air conditioning system further includes a bypass solenoid valve; wherein:

[0034] The bypass solenoid valve is arranged on the liquid side main pipe, and the first end of the bypass solenoid valve is respectively connected to the first end of the outdoor unit module, the first end of the energy storage module, and the second end of the energy storage module, and the second end of the bypass solenoid valve is respectively connected to the first end of the indoor unit module and the second end of the energy storage module.

[0035] The utility model proposes an energy storage air-conditioning system, which comprises an outdoor unit module, an energy storage module, an indoor unit module, a liquid side main pipe, a gas side main pipe and a low-pressure gas pipe; wherein: the first end of the outdoor unit module is connected to the first end of the indoor unit module through the liquid side main pipe, and the second end of the outdoor unit module is connected to the second end of the indoor unit module through the gas side main pipe; the first end of the energy storage module can be connected to the first end of the outdoor unit module through the liquid side main pipe, and the first end of the energy storage module can be connected to the second end of the outdoor unit module through the gas side main pipe; the first end of the energy storage module can be connected to the low-pressure end of the outdoor unit module through the low-pressure gas pipe; the second end of the energy storage module can be connected to the first end of the outdoor unit module through the liquid side main pipe, and the second end of the energy storage module can be connected to the first end of the indoor unit module through the liquid side main pipe. By controlling the on-off state between the energy storage module and the pipeline, all the functions of the energy storage module can still be realized when only the liquid side main pipe, the gas side main pipe and the low-pressure gas pipe are set. The liquid side main pipe, the gas side main pipe and the low-pressure gas pipe are pipes that need to be set up in a general outdoor unit. Therefore, there is no need to modify the outdoor unit, which improves the versatility of the energy storage air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 This is a functional module diagram of an embodiment of the energy storage air conditioning system of the utility model;

[0038] Figure 2 The utility model energy storage air conditioning system is applied in Figure 1 Specific structural diagram in the embodiment;

[0039] Figure 3 This is the internal structure diagram of the energy storage device in the energy storage air conditioning system of the utility model;

[0040] Figure 4 The internal structure diagram of the energy storage air conditioning system of the utility model in which the energy storage device is provided with a plurality of refrigerant pipes 202;

[0041] Figure 5 The overall structure diagram of the energy storage air conditioning system of the utility model is provided with a plurality of refrigerant pipes 202 for the energy storage device;

[0042] Figure 6 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the cooling mode;

[0043] Figure 7 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the cold storage mode;

[0044] Figure 8 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the cooling + cold storage mode;

[0045] Fig. 9 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the supercooling and cooling release mode;

[0046] Fig.10 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the heating mode;

[0047] Fig.11 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the heat storage mode;

[0048] Fig.12 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the heating + heat storage mode;

[0049] Fig.13 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the heat release defrosting mode;

[0050] Fig.14 It is a schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the first heat release heating mode;

[0051] Fig.15 Schematic diagram of the refrigerant path of the energy storage air conditioning system of the utility model in the second heat release heating mode.

[0052] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0053] Description of Figure Numbers:

[0054]

[0055] DETAILED DESCRIPTION

[0056] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0057] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0058] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0060] The utility model provides an energy storage air conditioning system, see Figure 1 , Figure 1 This is a functional module diagram of an embodiment of the energy storage air conditioning system of the utility model. In this embodiment, the energy storage air conditioning system includes an outdoor unit module 1, an energy storage module 2, an indoor unit module 5, a liquid side main pipe 3, a gas side main pipe 4 and a low-pressure gas pipe 6; wherein:

[0061] The first end of the outdoor unit module 1 is connected to the first end of the indoor unit module 5 through the liquid side main pipe 3, and the second end of the outdoor unit module 1 is connected to the second end of the indoor unit module 5 through the gas side main pipe 4;

[0062] The first end 201b of the energy storage module 2 can be connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3, and the first end 201b of the energy storage module 2 can be connected to the second end of the outdoor unit module 1 through the gas side main pipe 4;

[0063] The first end of the energy storage module 2 is connected to the low-pressure end of the outdoor unit module 1 through the low-pressure air pipe 6 in an on-off manner;

[0064] The second end 201α of the energy storage module 2 can be connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3, and the second end 201α of the energy storage module 2 can be connected to the first end of the indoor unit module 5 through the liquid side main pipe 3.

[0065] The outdoor unit module 1 is used for heat exchange with the external environment to achieve cooling or heating; the indoor unit module 5 is used for heat exchange with the indoor environment to achieve control of the indoor temperature.

[0066] Refrigerant circulation is achieved between the outdoor unit module 1 and the indoor unit module 5 through the liquid side main pipe 3 and the gas side main pipe 4, thereby achieving heat transfer.

[0067] The liquid side main pipe 3 is used to transmit liquid refrigerant; the gas side main pipe 4 is used to transmit gaseous refrigerant; the low-pressure gas pipe 6 is used for low-pressure measurement; it can be understood that in the cooling mode, the low-temperature liquid refrigerant is transmitted from the outdoor unit module 1 to the indoor unit module 5 through the liquid side main pipe 3 for heat exchange to obtain a high-temperature gaseous refrigerant, and the high-temperature gaseous refrigerant is transmitted from the indoor unit module 5 to the outdoor unit module 1 through the gas side main pipe 4 for heat exchange, thereby realizing a refrigeration cycle; in the heating mode, the high-temperature gaseous refrigerant is transmitted from the outdoor unit module 1 to the indoor unit module 5 through the gas side main pipe 4 for heat exchange to obtain a low-temperature liquid refrigerant, and the low-temperature liquid refrigerant is transmitted from the indoor unit module 5 to the outdoor unit module 1 through the liquid side main pipe 3 for heat exchange, thereby realizing a heating cycle.

[0068] It can be understood that the liquid side main pipe 3, the gas side main pipe 4 and the low-pressure gas pipe 6 are generally required to be set up in the air-conditioning system. On this basis, the present embodiment adjusts the specific connection method of the energy storage module 2 to achieve the connection needs of the energy storage module 2 without adding additional pipeline settings on the basis of the liquid side main pipe 3, the gas side main pipe 4 and the low-pressure gas pipe 6.

[0069] The energy storage module 2 is used to store cooling capacity or heating capacity, and release the stored energy when needed to assist in temperature regulation; for example, during cooling, the refrigerant flows through the energy storage module 2 to store cold. When the energy storage module 2 is needed to assist in cooling, the energy storage module 2 outputs the stored cooling capacity to the indoor unit module 5, thereby assisted cooling, so that it can take on part of the cooling output, reduce the output demand of the outdoor unit, and reduce the operating frequency of the outdoor unit's compressor 101, thereby reducing the system operating costs.

[0070] It can be understood that the refrigerant flows through the energy storage module 2 to realize energy storage and energy release. Therefore, by controlling the on-off of the refrigerant flow channel of the energy storage module 2, it is possible to control the specific state of the energy storage module 2 under different energy storage and energy release needs; therefore, in this embodiment, the specific connection relationship between the two ends of the energy storage module 2 and the liquid side main pipe 3, the gas side main pipe 4 and the low-pressure gas pipe 6 is determined.

[0071] The first end 201b of the energy storage module 2 can be connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3 in an on-off manner, so that the liquid refrigerant flowing out from the first end of the outdoor unit module 1 or flowing into the outdoor unit module 1 can flow into the first end 201b of the energy storage module 2 in a controllable manner; the first end 201b of the energy storage module 2 can be connected to the second end of the outdoor unit module 1 through the gas side main pipe 4 in an on-off manner, so that the gaseous refrigerant flowing out from the second end of the outdoor unit module 1 or flowing into the outdoor unit module 1 can flow into the first end 201b of the energy storage module 2 in a controllable manner.

[0072] The second end 201α of the energy storage module 2 can be connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3 in a switchable manner. Therefore, the liquid refrigerant flowing out from the first end of the outdoor unit module 1 or flowing into the outdoor unit module 1 can flow into the second end 201α of the energy storage module 2 in a controllable manner; the second end 201α of the energy storage module 2 can be connected to the first end of the indoor unit module 5 through the liquid side main pipe 3 in a switchable manner. Therefore, the gaseous refrigerant flowing out from the first end of the indoor unit module 5 or flowing into the outdoor unit module 1 can flow into the second end 201α of the energy storage module 2 in a controllable manner.

[0073] The first end 201b of the energy storage module 2 can be connected to the low-pressure end of the outdoor unit module 1 through the low-pressure air pipe 6 in an on-off manner. Therefore, the refrigerant flowing out from the first end 201b of the energy storage module 2 can flow into the low-pressure end of the outdoor unit module 1 through the low-pressure air pipe 6 in a controllable manner.

[0074] Therefore, by controlling the on and off states of the two ends of the energy storage module 2, different transmission paths of the refrigerant can be realized. When the refrigerant flows through the energy storage module 2, the energy storage module 2 can store energy through the refrigerant, or release energy to the refrigerant to assist in temperature control; therefore, in this embodiment, the function of the energy storage module 2 is realized based on the liquid side main pipe 3, the gas side main pipe 4 and the low-pressure gas pipe 6; there is no need to modify the outdoor unit structure, and it can be applied to general air-conditioning systems.

[0075] This embodiment controls the on-off state between the energy storage module 2 and the pipeline, so that all functions of the energy storage module 2 can be realized when only the liquid side main pipe 3, the gas side main pipe 4 and the low-pressure gas pipe 6 are set. The liquid side main pipe 3, the gas side main pipe 4 and the low-pressure gas pipe 6 are pipelines that need to be set in a general outdoor unit. Therefore, there is no need to modify the outdoor unit, which improves the versatility of the energy storage air conditioner.

[0076] Further, see also Figure 2 The energy storage module 2 includes an energy storage device 201, a first switch unit 21, a second switch unit 22, a third switch unit 23, a fourth switch unit 24 and a heat release switch unit 25; wherein:

[0077] The first end of the accumulator 201 is connected to the first end of the outdoor unit module 1 through the first switch unit 21 and the liquid side main pipe 3 in sequence, and the first end of the accumulator 201 is connected to the second end of the outdoor unit module 1 through the second switch unit 22 and the gas side main pipe 4 in sequence;

[0078] The second end of the accumulator 201 is connected to the first end of the outdoor unit module 1 through the third switch unit 23 and the liquid side main pipe 3 in sequence, and the second end of the accumulator 201 is connected to the first end of the indoor unit module 5 through the fourth switch unit 24 and the liquid side main pipe 3 in sequence;

[0079] The first end of the accumulator 201 is also connected to the low-pressure end of the outdoor unit module 1 through the heat release switch unit 25 and the low-pressure air pipe 6 in sequence.

[0080] The accumulator 201 is provided with energy storage materials and a refrigerant pipe 202; wherein, the two ports of the refrigerant pipe 202 serve as the first end and the second end of the accumulator 201 respectively, and the refrigerant can flow into the accumulator 201 from one end, exchange heat with the energy storage material, and flow out from the other end; the energy storage material stores or releases energy by exchanging heat with the refrigerant in the refrigerant pipe 202; for the interior of the accumulator 201, the specific setting of the energy storage material can be selected based on actual needs.

[0081] The first switch unit 21, the second switch unit 22, the third switch unit 23, the fourth switch unit 24, and the heat release switch unit 25 are used to control the on / off state of both ends of the accumulator 201; when the first switch unit 21, the second switch unit 22, the third switch unit 23, the fourth switch unit 24, and the heat release switch unit 25 are all disconnected, the accumulator 201 is not connected to the circulation, and the indoor unit and the outdoor unit operate in a general operating mode. At this time, if cooling is performed, it is a cooling mode, and if heating is performed, it is a heating mode.

[0082] It is understandable that when the accumulator 201 needs to be connected to the circulation, both ends of the accumulator 201 need to be turned on so that the refrigerant has a complete circulation channel in the accumulator 201. Therefore, at least one corresponding switch unit is turned on at each end of the accumulator 201.

[0083] Specifically, in this embodiment, in addition to the cooling mode and heating mode in which the accumulator 201 is not connected to the cycle, a cold storage mode, a heat storage mode, a cooling + cold storage mode, a heating + heat storage mode, a supercooling release mode, a heat release defrosting mode, and a heat release heating mode can also be set.

[0084] In the cold storage mode, the indoor unit module 5 does not work and the outdoor unit module 1 is in cooling mode; the second switch unit 22 is connected to the third switch unit 23, and the first switch unit 21, the fourth switch unit 24 and the heat release switch unit 25 are disconnected; at this time, the low-temperature liquid refrigerant output by the outdoor unit module 1 is output through the liquid side main pipe 3, and flows into the refrigerant pipe 202 of the accumulator 201 through the third switch unit 23, and the energy storage material of the accumulator 201 exchanges heat with the liquid refrigerant in the refrigerant pipe 202 to realize cold storage. After the liquid refrigerant is converted into a gaseous refrigerant, it is output to the gas side main pipe 4 through the second switch unit 22 and returns to the outdoor unit module 1 to complete the cycle.

[0085] In the heat storage mode, the indoor unit module 5 does not work and the outdoor unit module 1 is heating; the second switch unit 22 and the third switch unit 23 are turned on, the first switch unit 21, the fourth switch unit 24 and the heat release switch unit 25 are turned off; at this time, the high-temperature gaseous refrigerant output by the outdoor unit module 1 is output through the gas side main pipe 4, and flows into the refrigerant pipe 202 of the accumulator 201 through the second switch unit 22, the energy storage material of the accumulator 201 exchanges heat with the high-temperature gaseous refrigerant in the refrigerant pipe 202 to achieve heat storage, and the gaseous refrigerant is converted into liquid refrigerant and output to the liquid side main pipe 3 through the third switch unit 23, and returns to the outdoor unit module 1 to complete the cycle.

[0086] In the cooling + cold storage mode, the outdoor unit module 1 and the indoor unit module 5 implement the cooling process. At the same time, the second switch unit 22 and the third switch unit 23 are turned on, and the first switch unit 21, the fourth switch unit 24 and the heat release switch unit 25 are turned off; at this time, the low-temperature liquid refrigerant output by the outdoor unit 1 is output through the liquid side main pipe 3, a part of the refrigerant is output to the indoor unit module 5, and a part of the refrigerant flows into the refrigerant pipe 202 of the accumulator 201 through the third switch unit 23. The energy storage material of the accumulator 201 exchanges heat with the liquid refrigerant in the refrigerant pipe 202 to realize cold storage. After the liquid refrigerant is converted into a gaseous refrigerant, it is output to the gas side main pipe 4 through the second switch unit 22, and returns to the outdoor unit module 1 together with the gaseous refrigerant output by the indoor unit module 5 to complete the cycle.

[0087] In the heating + heat storage mode, the outdoor unit module 1 and the indoor unit module 5 realize the heating process. At the same time, the second switch unit 22 and the third switch unit 23 are turned on, and the first switch unit 21, the fourth switch unit 24 and the heat release switch unit 25 are turned off; at this time, the high-temperature gaseous refrigerant output by the outdoor unit 1 is output through the gas side main pipe 4, a part of the refrigerant is output to the indoor unit module 5, and a part of the refrigerant flows into the refrigerant pipe 202 of the accumulator 201 through the second switch unit 22. The energy storage material of the accumulator 201 exchanges heat with the high-temperature gaseous refrigerant in the refrigerant pipe 202 to realize heat storage. After the gaseous refrigerant is converted into liquid refrigerant, it is output to the liquid side main pipe 3 through the third switch unit 23, and returns to the outdoor unit module 1 together with the liquid refrigerant output by the indoor unit module 5 to complete the cycle.

[0088] In the supercooling release mode, the outdoor unit module 1 and the indoor unit module 5 realize the refrigeration process. At the same time, the first switch unit 21 and the fourth switch unit 24 are turned on, and the second switch unit 22, the third switch unit 23 and the heat release switch unit 25 are turned off; at this time, the low-temperature liquid refrigerant output by the outdoor unit 1 is output through the liquid side main pipe 3, and flows into the refrigerant pipe 202 of the accumulator 201 through the first switch unit 21. The energy storage material of the accumulator 201 exchanges heat with the liquid refrigerant in the refrigerant pipe 202 to realize cold storage, and outputs the liquid refrigerant to the liquid side main pipe 3 through the fourth switch unit 24 to output the liquid refrigerant to the indoor unit module 5. After the indoor unit module 5 realizes refrigeration based on the liquid refrigerant, it outputs the gaseous refrigerant to the gas side main pipe 4, and the gaseous refrigerant returns to the outdoor unit module 1 to complete the cycle.

[0089] In the heat release defrost mode, the indoor unit module 5 does not work, and the outdoor unit module 1 cools to achieve defrosting of the heat exchanger in the outdoor unit module 1; at the same time, the second switch unit 22 and the third switch unit 23 are turned on, and the first switch unit 21, the fourth switch unit 24 and the heat release switch unit 25 are turned off; the low-temperature liquid refrigerant output by the outdoor unit 1 is output through the liquid side main pipe 3, and flows into the refrigerant pipe 202 of the accumulator 201 through the third switch unit 23, and the energy storage material of the accumulator 201 exchanges heat with the liquid refrigerant in the refrigerant pipe 202 to achieve cold storage. After the liquid refrigerant is converted into a gaseous refrigerant, it is output to the gas side main pipe 4 through the second switch unit 22, and returns to the outdoor unit module 1 to complete the cycle.

[0090] In the heat release heating mode, the outdoor unit module 1 implements the heating process. At the same time, the first switch unit 21, the second switch unit 22, and the fourth switch unit 24 are disconnected, and the third switch unit 23 and the heat release switch unit 25 are turned on. At this time, the high-temperature gaseous refrigerant output by the outdoor unit module 1 is output to the indoor unit module 5 through the gas side main pipe 4 for heat exchange. The indoor unit module 5 outputs the low-temperature liquid refrigerant to the accumulator 201 through the liquid side main pipe 3 and the third switch unit 23. The accumulator 201 performs heat exchange on the liquid refrigerant, and outputs the obtained high-temperature gaseous refrigerant to the outdoor unit module 1 through the heat release switch unit 25 to complete the cycle.

[0091] In this embodiment, matching with different modes can be achieved by on-off control based on the first switch unit 21 , the second switch unit 22 , the third switch unit 23 , and the fourth switch unit 24 .

[0092] Furthermore, the first switch unit 21 includes a first solenoid valve 212 and a first check valve 216, wherein:

[0093] The input end of the first one-way valve 216 is connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3 , and the output end of the first one-way valve 216 is connected to the first end of the accumulator 201 through the first solenoid valve 212 .

[0094] It can be seen from the above description of different modes that the first switch unit 21 is turned on in the supercooling release mode and turned off in other modes. Therefore, the flow direction of the refrigerant in the first switch unit 21 only needs to be set from the liquid side main pipe 3 to the first end of the accumulator 201. Therefore, in order to ensure the flow direction of the refrigerant and maintain the normal operation of the system, a first one-way valve 216 is set, and the direction of the first one-way valve 216 is set to flow from the liquid side main pipe 3 to the first end of the accumulator 201; the first solenoid valve 212 is used to control the on-off state of the channel between the liquid side main pipe 3 and the first end of the accumulator 201. When the first solenoid valve 212 is opened, the refrigerant can flow from the liquid side main pipe 3 to the first end of the accumulator 201. When the first solenoid valve 212 is closed, the refrigerant cannot flow in through this channel.

[0095] Furthermore, the second switch unit 22 includes a second solenoid valve 210, wherein:

[0096] A first end of the second solenoid valve 210 is connected to a first end of the accumulator 201 , and a second end of the second solenoid valve 210 is connected to a second end of the outdoor unit module 1 through the gas-side main pipe 4 .

[0097] It can be seen from the above descriptions of different modes that the second switch unit 22 is turned on in the cold storage mode, heat storage mode, refrigeration + cold storage mode, heating + heat storage mode, and heat release and defrost mode, and is turned off in other modes; at the same time, in the cold storage mode, refrigeration + cold storage mode, and heat release and defrost mode, the refrigerant flows from the first end of the heat accumulator to the gas side main pipe 4, and in the heat storage mode and heating + heat storage mode, the refrigerant flows from the gas side main pipe 4 to the first end of the heat accumulator; that is, there is a demand for different flow directions in the second switch unit 22, so there is no need to set a one-way valve; and the second solenoid valve 210 is used to control the on-off state of the channel between the gas side main pipe 4 and the first end of the accumulator 201. When the second solenoid valve 210 is opened, the refrigerant can flow between the gas side main pipe 4 and the first end of the accumulator 201, and when the second solenoid valve 210 is closed, the refrigerant cannot flow through this channel.

[0098] Furthermore, the heat release switch unit 25 includes a heat release solenoid valve 217; a first end of the heat release solenoid valve 217 is connected to a first end of the accumulator 201, and a second end of the heat release solenoid valve 217 is connected to a low-pressure end of the outdoor unit module 1 through the low-pressure air pipe 6.

[0099] It can be seen from the above description of different modes that the heat release switch unit 25 is turned on in the heat release heating mode and turned off in other modes; the heat release solenoid valve 217 is set to control the on-off state of the first end of the accumulator 201 and the low-pressure end of the outdoor unit module 1. When the heat release solenoid valve 217 is opened, the refrigerant can flow between the first end of the accumulator 201 and the low-pressure end of the outdoor unit module 1. When the heat release solenoid valve 217 is closed, the refrigerant cannot flow through this channel.

[0100] Further, the third switch unit 23 includes a first electronic expansion valve 206, wherein:

[0101] The first end of the first electronic expansion valve 206 is connected to the second end of the accumulator 201 , and the second end of the first electronic expansion valve 206 is connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3 .

[0102] It can be seen from the above description of different modes that the third switch unit 23 is turned on in the cold storage mode, heat storage mode, refrigeration + cold storage mode, heating + heat storage mode, and heat release and defrost mode, and is turned off in other modes; at the same time, in the cold storage mode, refrigeration + cold storage mode, and heat release and defrost mode, the refrigerant flows from the liquid side main pipe 3 to the second end of the heat accumulator, and in the heat storage mode and heating + heat storage mode, the refrigerant flows from the second end of the heat accumulator to the liquid side main pipe 3; that is, there is a demand for different flow directions in the third switch unit 23, so there is no need to set a one-way valve; and the first electronic expansion valve 206 is used to control the on-off state of the channel between the liquid side main pipe 3 and the second end of the accumulator 201 and the refrigerant flow rate. When the first electronic expansion valve 206 is opened, the refrigerant can flow between the liquid side main pipe 3 and the second end of the accumulator 201, and when the first electronic expansion valve 206 is closed, the refrigerant cannot flow through this channel.

[0103] Further, a plurality of refrigerant pipes 202 are provided in the accumulator 201, and the third switch unit 23 includes a plurality of first electronic expansion valves 206, the number of the first electronic expansion valves 206 is consistent with the number of the refrigerant pipes 202, and the first electronic expansion valves 206 are connected to the refrigerant pipes 202 in a one-to-one correspondence; wherein:

[0104] The first ends of the refrigerant pipes 202 are connected to each other as the first end of the accumulator 201;

[0105] The second end of each refrigerant pipe 202 is connected to the first end of the corresponding first electronic expansion valve 206, and the second end of the first electronic expansion valve 206 is connected to the first end of the outdoor unit module 1 through the liquid side main pipe 3;

[0106] The second end of each of the refrigerant pipes 202 is also connected to the first end of the indoor unit module 5 through the fourth switch unit 24 and the liquid side main pipe 3 in sequence.

[0107] In actual applications, if the accumulator 201 is large, the refrigerant pipe 202 inside the accumulator 201 is too long, and the resistance to the refrigerant circulation is too large, resulting in the refrigerant being unable to be smoothly discharged from the accumulator 201 in the cooling release, heat release and defrosting modes, resulting in shortcomings such as a small improvement in cooling energy efficiency and a slow defrosting speed.

[0108] In this embodiment, a plurality of refrigerant pipes 202 are arranged in the accumulator 201 based on actual needs; the specific number of the refrigerant pipes 202 can be set based on actual needs, such as one or more; for example, when the accumulator 201 is large, the number of the refrigerant pipes 202 is set to be large to alleviate the problem of excessive resistance, and when the accumulator 201 is small, the number of the refrigerant pipes 202 is set to be small to reduce costs.

[0109] In addition, the second end of the accumulator 201 is connected to the first electronic expansion valve 206 via a liquid separation device 214 .

[0110] See also Figure 3 , Figure 3 FIG. 2 shows a method of setting a refrigerant pipe 202 in the accumulator 201; Figure 3 It can be seen that there is only one refrigerant pipe 202 in the accumulator 201, one end of the refrigerant pipe 202 serves as the first end of the accumulator 201, and the other end serves as the second end of the accumulator 201. After the refrigerant enters, it needs to flow from one end of the refrigerant pipe 202 to the other end. When the accumulator 201 is large, the refrigerant pipe 202 is too long; however, since there is only one refrigerant pipe 202, only one first electronic expansion valve 206 needs to be set.

[0111] See also Figure 4 , 5 , Figure 4 , 5The figure shows a method of setting a plurality of refrigerant pipes 202 in the accumulator 201. Specifically, the number of refrigerant pipes 202 is 4 as an example for explanation; the refrigerant pipes 202 are set separately, and each refrigerant pipe 202 includes two ends. Therefore, each refrigerant pipe 202 can realize the input and output of the refrigerant; therefore, it is necessary to set a first electronic expansion valve 206 for each refrigerant pipe 202 to realize the control of the corresponding refrigerant pipe 202; it can be understood that the specific switching states of the plurality of first electronic expansion valves 206 are the same when controlled; the switching logic of the first electronic expansion valve 206 is the same as the logic of the aforementioned electronic expansion valve, which will not be repeated here; it can be understood that compared with the method of setting a refrigerant pipe 202, setting a plurality of refrigerant pipes 202 can reduce the length of a single refrigerant pipe 202, while increasing the total flow area of ​​the refrigerant pipe 202, greatly reducing the flow resistance, so that the refrigerant can pass through the refrigerant pipe 202 smoothly.

[0112] At the same time, a first electronic expansion valve 206 is provided for each refrigerant pipe 202, so that different first electronic expansion valves 206 can be controlled to control the amount of refrigerant in different refrigerant pipes 202, thereby more evenly controlling the heat exchange conditions of different areas inside the accumulator 201.

[0113] From the above description, it can be seen that using fewer refrigerant pipes 202 can have lower costs, but the flow resistance will become larger. Using more refrigerant pipes 202 requires higher costs, but can reduce flow resistance and more accurately control the heat exchange conditions inside the accumulator 201. Therefore, in actual applications, the number of refrigerant pipes 202 inside the accumulator 201 can be set based on actual needs.

[0114] Further, the fourth switch unit 24 includes a third solenoid valve 209 and a second one-way valve 215, wherein:

[0115] The input end of the second one-way valve 215 is connected to the second end of the accumulator 201, the output end of the second one-way valve 215 is connected to the first end of the third solenoid valve 209, and the second end of the third solenoid valve 209 is connected to the first end of the indoor unit module 5 through the liquid side main pipe 3.

[0116] It can be seen from the above descriptions of different modes that the fourth switch unit 24 is turned on in the supercooling release mode and turned off in other modes. Therefore, the flow direction of the refrigerant in the fourth switch unit 24 only needs to be set from the second end of the accumulator 201 to the liquid side main pipe 3. Therefore, in order to ensure the flow direction of the refrigerant and maintain the normal operation of the system, a second one-way valve 215 is set, and the direction of the second one-way valve 215 is set to flow from the second end of the accumulator 201 to the liquid side main pipe 3; the third solenoid valve 209 is used to control the on-off state of the channel between the liquid side main pipe 3 and the second end of the accumulator 201. When the third solenoid valve 209 is opened, the refrigerant can flow from the second end of the accumulator 201 to the liquid side main pipe 3. When the third solenoid valve 209 is closed, the refrigerant cannot flow out through this channel.

[0117] Furthermore, the outdoor unit module 1 includes a compressor 101, a vapor-liquid separator 102, a four-way valve 104, an outdoor heat exchanger 105, a subcooler 103, a second electronic expansion valve 106 and a third electronic expansion valve 107; wherein:

[0118] The exhaust end of the compressor 101 is connected to the first end of the four-way valve 104, the second end of the four-way valve 104 is connected to the first end through the outdoor heat exchanger 105, the second end of the outdoor heat exchanger 105 is connected to the first end of the second electronic expansion valve 106, the second end of the second electronic expansion valve 106 is connected to the first end of the first side of the subcooler 103 through the third electronic expansion valve 107, the second end of the first side of the subcooler 103 is connected to the third end of the four-way valve 104, the first end of the second side of the subcooler 103 is connected to the second end of the third electronic expansion valve 107; the third end of the four-way valve 104 is also connected to the intake end of the compressor 101 through the vapor-liquid separator 102;

[0119] The second end of the second side of the subcooler 103 serves as the first end of the outdoor unit module 1 , the fourth end of the four-way valve 104 serves as the second end of the outdoor unit module 1 , and the third end of the four-way valve 104 serves as the low-pressure end of the outdoor unit module 1 .

[0120] During refrigeration, the first end of the four-way valve 104 is connected to the second end, and the third end is connected to the fourth end. The refrigerant output from the exhaust end of the compressor 101 passes through the first end and the second end of the four-way valve 104 to reach the indoor heat exchanger 5011 for heat exchange to obtain a low-temperature liquid refrigerant. The low-temperature liquid refrigerant is further cooled by the subcooler 103 and then output to the liquid side main pipe 3; the gas side main pipe 4 returns the high-temperature gaseous refrigerant, and the high-temperature gaseous refrigerant passes through the fourth end and the third end of the four-way valve 104 in turn to reach the gas-liquid separator 102 for gas-liquid separation, and then is output to the air intake end of the compressor 101 to realize circulation.

[0121] During heating, the first end of the four-way valve 104 is connected to the fourth end, and the second end is connected to the third end. The exhaust end of the compressor 101 outputs high-temperature gaseous refrigerant to the gas side main pipe 4; the liquid side main pipe 3 returns the low-temperature liquid refrigerant. After the low-temperature liquid refrigerant reaches the subcooler 103, a part of it passes through the second electronic expansion valve 106 to reach the indoor heat exchanger 5011 for heat exchange, and then passes through the second end and the third end of the four-way valve 104 in turn to reach the vapor-liquid separator 102, and the other part passes through the third expansion valve to reach the vapor-liquid separator 102. After gas-liquid separation in the vapor-liquid separator 102, it is output to the air intake end of the compressor 101 to realize circulation.

[0122] Furthermore, the outdoor unit module further includes a low-pressure capillary tube 108 and a low-pressure expansion valve 109; wherein:

[0123] The first end of the low-pressure capillary tube 108 serves as the low-pressure end of the outdoor unit module 1 , the second end of the low-pressure capillary tube 108 is connected to the third end of the four-way valve 104 , and the low-pressure expansion valve 109 is connected in parallel with the low-pressure capillary tube 108 .

[0124] It can be understood that in a general outdoor unit, the low-pressure end is connected to the third end of the four-way valve 104 through a low-pressure capillary 108. Therefore, in this embodiment, by connecting the low-pressure end to the first end of the accumulator through the low-pressure air pipe 6, there is no need to perform additional modifications to the outdoor unit. On this basis, in order to further improve the availability of the system, a low-pressure expansion valve 109 is connected in parallel to the low-pressure capillary 108 in this embodiment, thereby expanding the flow area of ​​the low-pressure end and reducing the flow resistance, and the opening degree can be adjusted.

[0125] Furthermore, the indoor unit module 5 includes an indoor heat exchanger 5011 and a fourth electronic expansion valve 5012, characterized in that:

[0126] The first end of the fourth electronic expansion valve 5012 serves as the first end of the indoor unit module 5 , the second end of the fourth electronic expansion valve 5012 is connected to the first end of the indoor heat exchanger 5011 , and the second end of the indoor heat exchanger 5011 serves as the second end of the indoor unit module 5 .

[0127] The number of the indoor heat exchanger 5011 and the fourth electronic expansion valve 5012 may be one or more, and the indoor heat exchanger 5011 and the fourth electronic expansion valve 5012 are arranged in a one-to-one correspondence.

[0128] The fourth electronic expansion valve 5012 is used to control the refrigerant flow through the corresponding indoor heat exchanger 5011; when the corresponding indoor heat exchanger 5011 needs heating or cooling, the corresponding fourth electronic expansion valve 5012 opens and adjusts the opening based on the heating / cooling demand; when all fourth electronic expansion valves 5012 are closed, the indoor unit module 5 does not work.

[0129] During cooling, low-temperature liquid refrigerant is input through the liquid side main pipe 3, passes through the fourth electronic expansion valve 5012, and reaches the indoor heat exchanger 5011 for heat exchange to obtain high-temperature gaseous refrigerant, which is then output to the gas side main pipe 4;

[0130] During heating, high-temperature gaseous refrigerant is input through the gas-side main pipe 4, and after heat exchange in the indoor heat exchanger 5011, low-temperature liquid refrigerant is obtained and output to the liquid-side main pipe 3 through the fourth electronic expansion valve 5012.

[0131] Furthermore, the energy storage air conditioning system further includes a bypass solenoid valve 211; wherein:

[0132] The bypass solenoid valve 211 is arranged on the liquid side main pipe 3, and the first end of the bypass solenoid valve 211 is respectively connected to the first end of the outdoor unit module 1, the first end 201b of the energy storage module 2, and the second end 201α of the energy storage module 2, and the second end of the bypass solenoid valve 211 is respectively connected to the first end of the indoor unit module 5 and the second end 201α of the energy storage module 2.

[0133] The bypass solenoid valve 211 is used to control the circulation of refrigerant on the liquid side main pipe 3; when the bypass solenoid valve 211 is opened, the refrigerant can be directly transmitted between the indoor unit module 5 and the outdoor unit module 1; when the bypass solenoid valve 211 is closed, the refrigerant cannot be directly transmitted between the indoor unit module 5 and the outdoor unit module 1, but can be transmitted through the energy storage module 2.

[0134] The overall implementation of this application is described below.

[0135]

[0136] The above table shows the status of each component in different modes; when the outdoor machine is in cooling mode, it includes four modes: cooling, cold storage, cooling + cold storage, and supercooling cold release; when the outdoor machine is in heating mode, it includes four modes: heating, heat storage, heating + heat storage, heat release defrosting, and heat release heating. Among them, the heat release heating mode is further divided into a first heat release heating mode and a second heat release heating mode; when the four-way valve 104 is powered off, the first end is connected to the second end, and the third end is connected to the fourth end; when the four-way valve 104 is powered on, the first end is connected to the fourth end, and the second end is connected to the third end; specifically:

[0137] See also Figure 6 In the cooling mode, the four-way valve 104 is powered off, the bypass solenoid valve 211 is opened, the first solenoid valve 212, the second solenoid valve 210, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the first electronic expansion valve 206 is closed, and the second electronic expansion valve 106 is opened; the accumulator 201 does not work;

[0138] After the refrigerant output from the exhaust end of the compressor 101 undergoes heat exchange in the outdoor heat exchanger 105, it enters the indoor heat exchanger 5011 through the liquid side main pipe 3 for heat exchange, and the obtained gaseous refrigerant returns to the air inlet end of the compressor 101 through the gas side main pipe 4 and the gas-liquid separator 102, realizing the refrigeration cycle; at this time, the outdoor heat exchanger 105 acts as a condenser and the indoor heat exchanger 5011 acts as an evaporator.

[0139] See also Figure 7 In the cold storage mode, the four-way valve 104 is powered off, the bypass solenoid valve 211 is closed, the first solenoid valve 212, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the second solenoid valve 210 is opened, the first electronic expansion valve 206, and the second electronic expansion valve 106 are opened; the indoor unit does not work;

[0140] The refrigerant output from the exhaust end of the compressor 101 is heat exchanged in the outdoor heat exchanger 105, then output through the liquid side main pipe 3, and after throttling through the first electronic expansion valve 206, enters the accumulator 201 for heat exchange, storing the cold energy in the accumulator 201. The obtained gaseous refrigerant is returned to the air inlet end of the compressor 101 through the gas side main pipe 4 and the gas-liquid separator 102, realizing the cold storage cycle; at this time, the outdoor heat exchanger 105 acts as a condenser and the accumulator 201 acts as an evaporator, and the degree of cold storage in the accumulator 201 can be adjusted by controlling the opening of the first electronic expansion valve 206.

[0141] See also Figure 8 , in the cooling + cold storage mode, the four-way valve 104 is powered off, the bypass solenoid valve 211 is opened, the first solenoid valve 212, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the second solenoid valve 210 is opened, and the first electronic expansion valve 206 and the second electronic expansion valve 106 are opened;

[0142] The refrigerant output from the exhaust end of the compressor 101 is subjected to heat exchange in the outdoor heat exchanger 105 and then output through the liquid side main pipe 3. A part of the refrigerant enters the indoor heat exchanger 5011 for heat exchange, and the obtained gaseous refrigerant returns to the air inlet end of the compressor 101 through the gas side main pipe 4 and the vapor-liquid separator 102; the other part enters the accumulator 201 for heat exchange after being throttled by the first electronic expansion valve 206, and the cold energy is stored in the accumulator 201. The obtained gaseous refrigerant returns to the air inlet end of the compressor 101 through the gas side main pipe 4 and the vapor-liquid separator 102, thereby realizing a refrigeration cycle; the two-way flow distribution can be adjusted by controlling the opening of the first electronic expansion valve 206; at this time, the outdoor heat exchanger 105 acts as a condenser, the indoor heat exchanger 5011 and the accumulator 201 act as evaporators, the accumulator 201 stores cold, and the indoor heat exchanger 5011 provides cold energy to the indoor room.

[0143] See also Fig. 9In the supercooling release mode, the four-way valve 104 is powered off, the bypass solenoid valve 211 is closed, the first solenoid valve 212 and the third solenoid valve 209 are opened, the second solenoid valve 210 and the heat release solenoid valve 217 are closed, the first electronic expansion valve 206 is closed, and the second electronic expansion valve 106 is opened;

[0144] After the refrigerant output from the exhaust end of the compressor 101 undergoes heat exchange in the outdoor heat exchanger 105, it enters the accumulator 201 through the liquid side main pipe 3 for further cooling. The output low-temperature liquid refrigerant passes through the third solenoid valve 209 and the liquid side main pipe 3 and enters the indoor heat exchanger 5011 for heat exchange. The obtained gaseous refrigerant returns to the air inlet end of the compressor 101 through the gas side main pipe 4 and the gas-liquid separator 102 to realize the refrigeration cycle. At this time, the outdoor heat exchanger 105 acts as a condenser, the indoor heat exchanger 5011 acts as an evaporator, and the accumulator 201 acts as a subcooler 103. The accumulator 201 releases cold air to the refrigerant in the condensed state, further improving its supercooling degree and increasing its refrigeration capacity.

[0145] See also Fig.10 In the heating mode, the four-way valve 104 is energized, the bypass solenoid valve 211 is opened, the first solenoid valve 212, the second solenoid valve 210, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the first electronic expansion valve 206 is closed, and the second electronic expansion valve 106 is opened; the accumulator 201 does not work;

[0146] The refrigerant output from the exhaust end of the compressor 101 enters the indoor heat exchanger 5011 through the gas side main pipe 4 for heat exchange. The obtained liquid refrigerant reaches the outdoor heat exchanger 105 through the liquid side main pipe 3 for heat exchange, and then returns to the air inlet end of the compressor 101 through the gas-liquid separator 102 to realize the heating cycle; at this time, the outdoor heat exchanger 105 acts as an evaporator and the indoor heat exchanger 5011 acts as a condenser.

[0147] See also Fig.11 In the heat storage mode, the four-way valve 104 is energized, the bypass solenoid valve 211 is closed, the first solenoid valve 212, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the second solenoid valve 210 is opened, the first electronic expansion valve 206, and the second electronic expansion valve 106 are opened; the indoor unit does not work;

[0148] The refrigerant output from the exhaust end of the compressor 101 enters the accumulator 201 through the gas side main pipe 4 for heat exchange to store heat. The obtained liquid refrigerant reaches the outdoor heat exchanger 105 through the liquid side main pipe 3 for heat exchange, and then returns to the air inlet end of the compressor 101 through the gas-liquid separator 102 to realize the heat storage cycle. At this time, the outdoor heat exchanger 105 acts as an evaporator and the accumulator 201 acts as a condenser. The condensation process of the accumulator 201 can be adjusted by controlling the opening of the first electronic expansion valve 206.

[0149] See also Fig.12 In the heating + heat storage mode, the four-way valve 104 is energized, the bypass solenoid valve 211 is opened, the first solenoid valve 212, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the second solenoid valve 210 is opened, and the first electronic expansion valve 206 and the second electronic expansion valve 106 are opened;

[0150] The refrigerant output from the exhaust end of the compressor 101 is output through the gas side main pipe 4, and a part of it enters the indoor heat exchanger 5011 for heat exchange. The obtained liquid refrigerant reaches the outdoor heat exchanger 105 through the liquid side main pipe 3 for heat exchange, and then returns to the air inlet end of the compressor 101 through the vapor-liquid separator 102. The other part enters the accumulator 201 for heat exchange. The accumulator 201 stores heat, and the obtained liquid refrigerant reaches the outdoor heat exchanger 105 through the liquid side main pipe 3 for heat exchange, and then returns to the air inlet end of the compressor 101 through the vapor-liquid separator 102, thereby realizing a heating cycle. The two-way flow distribution can be adjusted by controlling the opening of the first electronic expansion valve 206. At this time, the outdoor heat exchanger 105 serves as an evaporator, and the indoor heat exchanger 5011 and the accumulator 201 serve as condensers. The condensation process of the accumulator 201 can be adjusted by controlling the opening of the first electronic expansion valve 206.

[0151] See also Fig.13 In the heat release defrosting mode, the four-way valve 104 is powered off, the bypass solenoid valve 211 is closed, the first solenoid valve 212, the third solenoid valve 209, and the heat release solenoid valve 217 are closed, the second solenoid valve 210 is opened, the first electronic expansion valve 206 is opened, the second electronic expansion valve 106 is opened, and the indoor unit does not work;

[0152] The refrigerant output from the exhaust end of the compressor 101 is subjected to heat exchange in the outdoor heat exchanger 105 to melt the frost layer on the outdoor heat exchanger 105, and the refrigerant enters the accumulator 201 through the liquid side main pipe 3 for heat exchange, and the obtained gaseous refrigerant is returned to the air inlet end of the compressor 101 through the gas side main pipe 4 and the gas-liquid separator 102 to realize circulation; at this time, the outdoor heat exchanger 105 acts as a condenser and the accumulator 201 acts as an evaporator.

[0153] See also Fig.14 In the first heat-release heating mode, the four-way valve 104 is energized, the bypass solenoid valve 211 and the heat-release solenoid valve 217 are opened, the first solenoid valve 212, the second solenoid valve 210, the third solenoid valve 209, and the heat-release solenoid valve 217 are closed, the first electronic expansion valve 206 is opened, the second electronic expansion valve 106 is closed, and the low-pressure expansion valve 109 can be opened or closed based on actual needs;

[0154] The refrigerant output from the exhaust end of the compressor 101 enters the indoor heat exchanger 5011 through the gas side main pipe 4 for heat exchange, and the obtained liquid refrigerant reaches the first electronic expansion valve 206 through the liquid side main pipe 3 for throttling and is then input into the accumulator 201 for evaporation to obtain a high-temperature gaseous refrigerant. The high-temperature gaseous refrigerant returns to the air inlet end of the compressor 101 through the low-pressure air pipe 6 to realize the heating cycle; at this time, the outdoor heat exchanger 105 does not work, the accumulator 201 acts as an evaporator, and the indoor heat exchanger 5011 acts as a condenser; at this time, the accumulator 201 bears all evaporation loads.

[0155] See also Fig.15 In the second heat-release heating mode, the four-way valve 104 is energized, the bypass solenoid valve 211 and the heat-release solenoid valve 217 are opened, the first solenoid valve 212, the second solenoid valve 210, the third solenoid valve 209, and the heat-release solenoid valve 217 are closed, the first electronic expansion valve 206 and the second electronic expansion valve 106 are opened, and the low-pressure expansion valve 109 can be opened or closed based on actual needs;

[0156] The refrigerant output from the exhaust end of the compressor 101 enters the indoor heat exchanger 5011 through the gas side main pipe 4 for heat exchange, and the obtained liquid refrigerant passes through the liquid side main pipe 3, and a part of it is evaporated through the outdoor heat exchanger 105 to obtain a high-temperature gaseous refrigerant, and the high-temperature gaseous refrigerant returns to the air inlet end of the compressor 101; the other part reaches the first electronic expansion valve 206 for throttling and is input into the accumulator 201 for evaporation to obtain a high-temperature gaseous refrigerant, and the high-temperature gaseous refrigerant returns to the air inlet end of the compressor 101 through the low-pressure air pipe 6 to realize the heating cycle; at this time, the outdoor heat exchanger 105 and the accumulator 201 act as evaporators, and the indoor heat exchanger 5011 acts as a condenser; at this time, the outdoor heat exchanger 105 and the accumulator 201 bear the evaporation load at the same time.

[0157] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the presence of other identical elements in the process, method, article or system including the element. The serial numbers of the above-mentioned embodiments of the utility model are for description only and do not represent the advantages and disadvantages of the embodiments.

[0158] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An energy storage air conditioning system, characterized in that: The energy storage air conditioning system comprises an outdoor unit module, an energy storage module, an indoor unit module, a liquid side main pipe, a gas side main pipe and a low-pressure gas pipe; wherein: the first end of the outdoor unit module is connected to the first end of the indoor unit module through the liquid side main pipe, and the second end of the outdoor unit module is connected to the second end of the indoor unit module through the gas side main pipe; The first end of the energy storage module can be connected to the first end of the outdoor unit module through the liquid side main pipe, and the first end of the energy storage module can be connected to the second end of the outdoor unit module through the gas side main pipe; The first end of the energy storage module is connected to the low-pressure end of the outdoor unit module through the low-pressure air pipe in an on-off manner; The second end of the energy storage module can be connected to the first end of the outdoor unit module through the liquid side main pipe, and the second end of the energy storage module can be connected to the first end of the indoor unit module through the liquid side main pipe.

2. The energy storage air conditioning system according to claim 1, characterized in that: The energy storage module includes an energy storage device, a first switch unit, a second switch unit, a third switch unit, a fourth switch unit and a heat release switch unit; wherein: The first end of the accumulator is connected to the first end of the outdoor unit module through the first switch unit and the liquid side main pipe in sequence, and the first end of the accumulator is connected to the second end of the outdoor unit module through the second switch unit and the gas side main pipe in sequence; The second end of the accumulator is connected to the first end of the outdoor unit module through the third switch unit and the liquid side main pipe in sequence, and the second end of the accumulator is connected to the first end of the indoor unit module through the fourth switch unit and the liquid side main pipe in sequence; The first end of the accumulator is also connected to the low-pressure end of the outdoor unit module through the heat release switch unit and the low-pressure air pipe in sequence.

3. The energy storage air conditioning system according to claim 2, characterized in that: The first switch unit includes a first solenoid valve and a first one-way valve, wherein: The input end of the first one-way valve is connected to the first end of the outdoor unit module through the liquid side main pipe, and the output end of the first one-way valve is connected to the first end of the accumulator through the first solenoid valve.

4. The energy storage air conditioning system according to claim 2, characterized in that: The second switch unit includes a second solenoid valve, wherein: The first end of the second solenoid valve is connected to the first end of the accumulator, and the second end of the second solenoid valve is connected to the second end of the outdoor unit module through the gas side main pipe.

5. The energy storage air conditioning system according to claim 2, characterized in that: The heat release switch unit includes a heat release solenoid valve; a first end of the heat release solenoid valve is connected to a first end of the accumulator, and a second end of the heat release solenoid valve is connected to a low-pressure end of the outdoor unit module through the low-pressure gas pipe.

6. The energy storage air conditioning system according to claim 2, characterized in that: The third switch unit includes a first electronic expansion valve, wherein: The first end of the first electronic expansion valve is connected to the second end of the accumulator, and the second end of the first electronic expansion valve is connected to the first end of the outdoor unit module through the liquid side main pipe.

7. The energy storage air conditioning system according to claim 2, characterized in that: The accumulator is provided with a plurality of refrigerant pipelines, the third switch unit includes a plurality of first electronic expansion valves, the number of the first electronic expansion valves is consistent with the number of the refrigerant pipelines, and the first electronic expansion valves are connected to the refrigerant pipelines in a one-to-one correspondence; wherein: The first ends of the refrigerant pipes are connected to each other as the first ends of the accumulator; The second end of each refrigerant pipe is connected to the first end of the corresponding first electronic expansion valve, and the second end of the first electronic expansion valve is connected to the first end of the outdoor unit module through the liquid side main pipe; The second end of each of the refrigerant pipes is also connected to the first end of the indoor unit module through the fourth switch unit and the liquid side main pipe in sequence.

8. The energy storage air conditioning system according to claim 2, characterized in that: The fourth switch unit includes a third solenoid valve and a second one-way valve, wherein: The input end of the second one-way valve is connected to the second end of the accumulator, the output end of the second one-way valve is connected to the first end of the third solenoid valve, and the second end of the third solenoid valve is connected to the first end of the indoor unit module through the liquid side main pipe.

9. The energy storage air conditioning system according to claim 1, characterized in that: The outdoor unit module includes a compressor, a vapor-liquid separator, a four-way valve, an outdoor heat exchanger, a subcooler, a second electronic expansion valve and a third electronic expansion valve; wherein: The exhaust end of the compressor is connected to the first end of the four-way valve, the second end of the four-way valve is connected to the first end through the outdoor heat exchanger, the second end of the outdoor heat exchanger is connected to the first end of the second electronic expansion valve, the second end of the second electronic expansion valve is connected to the first end of the first side of the subcooler through the third electronic expansion valve, the second end of the first side of the subcooler is connected to the third end of the four-way valve, and the first end of the second side of the subcooler is connected to the second end of the third electronic expansion valve; the third end of the four-way valve is also connected to the intake end of the compressor through the vapor-liquid separator; The second end of the second side of the subcooler serves as the first end of the outdoor unit module, the fourth end of the four-way valve serves as the second end of the outdoor unit module, and the third end of the four-way valve serves as the low-pressure end of the outdoor unit module.

10. The energy storage air conditioning system according to claim 9, characterized in that: The outdoor unit module also includes a low-pressure capillary tube and a low-pressure expansion valve; wherein: The first end of the low-pressure capillary tube serves as the low-pressure end of the outdoor unit module, the second end of the low-pressure capillary tube is connected to the third end of the four-way valve, and the low-pressure expansion valve is connected in parallel with the low-pressure capillary tube.

11. The energy storage air conditioning system according to claim 1, characterized in that: The indoor unit module includes an indoor heat exchanger and a fourth electronic expansion valve, and is characterized in that: The first end of the fourth electronic expansion valve serves as the first end of the indoor unit module, the second end of the fourth electronic expansion valve is connected to the first end of the indoor heat exchanger, and the second end of the indoor heat exchanger serves as the second end of the indoor unit module.

12. The energy storage air conditioning system according to claim 1, characterized in that: The energy storage air conditioning system also includes a bypass solenoid valve; wherein: The bypass solenoid valve is arranged on the liquid side main pipe, and the first end of the bypass solenoid valve is respectively connected to the first end of the outdoor unit module, the first end of the energy storage module, and the second end of the energy storage module, and the second end of the bypass solenoid valve is respectively connected to the first end of the indoor unit module and the second end of the energy storage module.

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