Air conditioning system

Abstract

The utility model provides a kind of air conditioning system, including outer machine module, energy storage module, inner machine module, liquid side main pipe, gas side main pipe and pump body structure;The first end of energy storage module is selectively connected or disconnected with the first end of outer machine module through liquid side main pipe, the first end of energy storage module is selectively connected or disconnected with the first end of inner machine module through liquid side main pipe;The second end of energy storage module is selectively connected or disconnected with the second end of outer machine module through gas side main pipe, the second end of energy storage module is selectively connected or disconnected with the second end of inner machine module through gas side main pipe;The first end of pump body structure is selectively connected or disconnected with one end of energy storage module through liquid side main pipe, the second end of pump body structure is selectively connected or disconnected with the first end of inner machine module through liquid side main pipe.The technical scheme provided by the utility model can solve the technical problem of high power consumption of the air conditioning system in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning system technology, and more specifically, to an air conditioning system. Background Technology

[0002] In existing technologies, energy storage air conditioning systems, as an effective means of electricity load transfer, aim to optimize energy utilization by taking advantage of electricity price differences at different times through energy storage and release processes. A typical energy storage air conditioning system usually includes an outdoor unit module, one or more indoor unit modules, and an energy storage device. The energy storage device stores cooling or heating energy when electricity prices are low, and releases this cooling or heating energy to meet indoor demand during peak electricity price periods.

[0003] However, in the cooling (or heating) mode, existing energy storage air conditioning systems still require the compressor to run to maintain the refrigerant circulation, even though the energy storage device can provide some cooling (or heating). This results in high overall power consumption during peak electricity price periods, failing to fully realize the energy-saving potential of peak shaving and valley filling.

[0004] Especially in the cool-release mode, the accumulator is used only as a subcooler to further cool the medium-temperature, medium-pressure refrigerant liquid exiting the condenser, while the compressor operation is still necessary to ensure refrigerant circulation. However, the compressor consumes significant energy during operation; therefore, existing energy storage air conditioning systems have limited cost savings during peak electricity prices and fail to effectively reduce electricity expenses. Utility Model Content

[0005] The main objective of this invention is to provide an air conditioning system to solve the technical problem of high power consumption in existing air conditioning systems.

[0006] To achieve the above objectives, this utility model provides an energy storage air conditioning system, including an outdoor unit module, an energy storage module, an indoor unit module, a liquid-side main pipe, a gas-side main pipe, and a pump body structure;

[0007] The first end of the outdoor unit module can be selectively connected to or disconnected from the first end of the indoor unit module via the liquid-side main pipe, and the second end of the outdoor unit module can be selectively connected to or disconnected from the second end of the indoor unit module via the gas-side main pipe;

[0008] The first end of the energy storage module can be selectively connected to or disconnected from 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 selectively connected to or disconnected from the first end of the indoor unit module through the liquid-side main pipe;

[0009] The second end of the energy storage module can be selectively connected to or disconnected from the second end of the outdoor unit module via the gas-side main pipe, and the second end of the energy storage module can be selectively connected to or disconnected from the second end of the indoor unit module via the gas-side main pipe;

[0010] The first end of the pump body structure can be selectively connected to or disconnected from one end of the energy storage module via the liquid-side main pipe, and the second end of the pump body structure can be selectively connected to or disconnected from the first end of the indoor unit module via the liquid-side main pipe.

[0011] Furthermore, the outdoor unit module includes a compressor;

[0012] When the compressor is turned off, at least a portion of the pump body structure is activated to perform pumping.

[0013] When the compressor is turned on, the pump body structure is in the closed state.

[0014] Furthermore, the pump body structure includes a first fluorine pump, the pumping direction of the first fluorine pump being from the first end of the liquid-side main pipe to the first end of the indoor unit module;

[0015] The air conditioning system has a full ice storage and release cooling mode. When the air conditioning system is in the full ice storage and release cooling mode, the first refrigerant pump is turned on and the compressor is turned off. The first end of the first refrigerant pump is connected to one end of the energy storage module through the liquid-side main pipe. The second end of the first refrigerant pump is connected to the first end of the indoor unit module through the liquid-side main pipe. The first end of the outdoor unit module is disconnected from the first end of the indoor unit module. The second end of the outdoor unit module is disconnected from the second end of the indoor unit module. The first end of the energy storage module is connected to the first end of the indoor unit module through the liquid-side main pipe. The second end of the energy storage module is connected to the second end of the indoor unit module through the gas-side main pipe.

[0016] Furthermore, the air conditioning system also has a subcooling release mode; when the air conditioning system is in the subcooling release mode, the first refrigerant pump is turned off and the compressor is turned on; 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 is connected or disconnected from the first end of the indoor unit module through the liquid-side main pipe, and the second end of the energy storage module is selectively connected or disconnected from the second end of the outdoor unit module through the gas-side main pipe; the air conditioning system also includes a control module, which is configured as follows:

[0017] When the air conditioning system is in the full ice storage and cooling mode, if the temperature of the energy storage module is lower than the first preset temperature, the air conditioning system continues to be in the full ice storage and cooling mode.

[0018] When the air conditioning system is in the full ice storage and cooling mode, if the temperature of the energy storage module is greater than or equal to the first preset temperature, the air conditioning system will continue to switch to the subcooling and cooling mode.

[0019] Furthermore, the air conditioning system also has a conventional cooling mode; when the air conditioning system is in the conventional cooling mode, the first refrigerant pump is turned off and the compressor is turned on; 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 is disconnected from the outdoor unit module via the liquid-side main pipe, and the second end of the energy storage module is disconnected from the gas-side main pipe; the control module is configured as follows:

[0020] When the air conditioning system is in the subcooling release mode, if the temperature of the energy storage module is lower than the second preset temperature, the air conditioning system continues to be in the subcooling release mode.

[0021] When the air conditioning system is in the subcooling release mode, if the temperature of the energy storage module is greater than or equal to the second preset temperature, the air conditioning system will continue to switch to the normal cooling mode.

[0022] The second preset temperature is greater than the first preset temperature.

[0023] Furthermore, the air conditioning system also includes a control module, which is configured as follows:

[0024] When the electricity price for the air conditioning system is at its peak, the air conditioning system is controlled to enter the full ice storage and cooling mode.

[0025] When electricity prices are at their lowest, the air conditioning system is controlled to operate, and the energy storage module is made to store cold energy.

[0026] Furthermore, the pump body structure includes a second fluorine pump, the pumping direction of the second fluorine pump being from the first end of the indoor unit module to the first end of the liquid side main pipe;

[0027] The air conditioning system has an energy storage and heat release mode. When the air conditioning system is in the energy storage and heat release mode, the second refrigerant pump is turned on, the compressor is turned off, the first end of the outdoor unit module is disconnected from the liquid-side main pipe, and the second end of the outdoor unit module is disconnected from the second end of the gas-side main pipe. The first end of the energy storage module is connected to the first end of the indoor unit module through the liquid-side main pipe, and the second end of the energy storage module is connected to the second end of the indoor unit module through the gas-side main pipe. The first end of the second refrigerant pump is connected to one end of the energy storage module through the liquid-side main pipe, and the second end of the pump body structure is connected to the first end of the indoor unit module through the liquid-side main pipe.

[0028] Furthermore, the air conditioning system also has a conventional heating mode; when the air conditioning system is in the conventional heating mode, the second refrigerant pump is turned off and the compressor is turned on; 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 is disconnected from the outdoor unit module via the liquid-side main pipe, and the second end of the energy storage module is disconnected from the gas-side main pipe; the air conditioning system also includes a control module, which is configured as follows:

[0029] When the air conditioning system is in the energy storage and heat release mode, if the temperature of the energy storage module is greater than the third preset temperature, the air conditioning system will continue to be in the energy storage and heat release mode.

[0030] When the air conditioning system is in the energy storage and heat release mode, if the temperature of the energy storage module is less than or equal to the third preset temperature, the air conditioning system will continue to switch to the conventional heating mode.

[0031] Furthermore, the control module is also configured to:

[0032] When the air conditioning system is in the conventional heating mode, and the defrosting conditions are met, the air conditioning system is controlled to enter the defrosting mode; and / or,

[0033] When the electricity price for the air conditioning system is at its peak, the air conditioning system is controlled to enter the energy storage and heat release mode.

[0034] When electricity prices are at their lowest, the air conditioning system is controlled to operate, and the energy storage module is made to store heat energy.

[0035] Furthermore, the connection point between the first end of the energy storage module and the liquid-side main pipe is the first connection end; the energy storage air conditioning system also includes:

[0036] A diversion branch is provided, one end of which is connected to the portion of the liquid-side main pipe located between the first connection end and the first end of the indoor unit module, and the other end of which is connected to the portion of the liquid-side main pipe located between one end of the diversion branch and the indoor unit module. At least a portion of the pump body structure is provided on the diversion branch, and at least a portion of the pump body structure has a pumping state for pumping fluid and a shut-off state for stopping operation.

[0037] A switching unit is disposed on the liquid-side main pipe. The switching unit is located between one end of the liquid-side main pipe connected to one end of the branch line and the other end of the liquid-side main pipe connected to the other end of the branch line. The switching unit is configured to be on and off.

[0038] Furthermore, the diversion branch is singular, and the pump body structure includes a first fluorine pump, which is disposed on the diversion branch. The first fluorine pump has a first fluorine pumping state and a first closed state; wherein, when the first fluorine pump is in the first fluorine pumping state, the fluid in the diversion branch flows from one end of the diversion branch to the other end of the diversion branch; or,

[0039] The diversion branch is singular, and the pump body structure includes a second fluorine pump, which is disposed on the diversion branch. The second fluorine pump has a second fluorine pumping state and a second off state; wherein, when the second fluorine pump is in the second fluorine pumping state, the fluid in the diversion branch flows from the other end of the diversion branch to one end of the diversion branch; or...

[0040] The flow branch is divided into two sections. The pump body structure includes a first fluorine pump and a second fluorine pump. The first fluorine pump is disposed on one of the flow branch sections and has a first fluorine pumping state and a first closed state. When the first fluorine pump is in the first fluorine pumping state, the fluid in the flow branch flows from one end of the flow branch to the other end. The second fluorine pump is disposed on the other flow branch section and has a second fluorine pumping state and a second closed state. When the second fluorine pump is in the second fluorine pumping state, the fluid in the flow branch flows from the other end of the flow branch to one end of the flow branch.

[0041] By applying the technical solution of this utility model, the energy storage air conditioning system of this application, through the introduction of a pump structure and intelligent control module, achieves flexible switching between multiple operating modes under different electricity prices and temperature conditions, including full ice storage cooling, subcooling cooling, conventional cooling, energy storage heat release, and conventional heating, thereby significantly reducing the operating cost of the air conditioning system. During peak electricity prices, the system can automatically switch to energy storage cooling or heat release mode, effectively utilizing the energy stored in the energy storage module and avoiding compressor operation during high electricity price periods, significantly reducing electricity costs. Simultaneously, by controlling the temperature of the energy storage module, the system can intelligently determine when to switch from energy storage mode to conventional mode, ensuring efficient system operation and comfort. Furthermore, the introduction of the pump structure not only reduces energy consumption but also improves system reliability, reduces compressor wear, and extends the service life of the air conditioning system. This system is particularly suitable for commercial and industrial air conditioning applications, automatically adjusting its operating strategy according to changes in power load and energy storage module temperature, achieving a dual improvement in energy saving, emission reduction, and economic benefits. Attached Figure Description

[0042] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0043] Figure 1 A schematic diagram of an air conditioning system according to an embodiment of the present invention is shown;

[0044] Figure 2 A schematic diagram of an air conditioning system in conventional cooling mode according to an embodiment of the present invention is shown.

[0045] Figure 3 A schematic diagram of an air conditioning system in full ice storage and cooling mode according to an embodiment of the present invention is shown.

[0046] Figure 4 A schematic diagram of an air conditioning system in full cooling release mode according to an embodiment of the present invention is shown.

[0047] Figure 5 A schematic diagram of an air conditioning system in cooling and heat storage mode according to an embodiment of the present invention is shown.

[0048] Figure 6 A schematic diagram of an air conditioning system in a cooling release / subcooling mode according to an embodiment of the present invention is shown.

[0049] Figure 7 A schematic diagram of an air conditioning system in conventional heating mode according to an embodiment of the present invention is shown.

[0050] Figure 8 A schematic diagram of an air conditioning system in full heat storage mode according to an embodiment of the present invention is shown.

[0051] Figure 9 A schematic diagram of an air conditioning system in cooling and heat storage mode according to an embodiment of the present invention is shown.

[0052] Figure 10 A schematic diagram of an air conditioning system in heat release defrosting mode according to an embodiment of the present invention is shown.

[0053] Figure 11 A schematic diagram of an air conditioning system with a dual-fluorine pump according to an embodiment of the present invention is shown;

[0054] Figure 12 A schematic diagram of a dual-fluorine pump air conditioning system in heating and heat storage mode according to an embodiment of the present invention is shown.

[0055] Figure 13 A schematic diagram of an air conditioning system employing a three-tube compressor, according to an embodiment of the present invention, is shown.

[0056] Figure 14 A schematic diagram of the control flow of an air conditioning system during cooling, according to an embodiment of the present invention, is shown.

[0057] Figure 15 A schematic diagram of the control flow of an air conditioning system in heating mode according to an embodiment of the present invention is shown.

[0058] The above figures include the following reference numerals:

[0059] 1. Outdoor unit; 2. Energy storage equipment; 3. Liquid-side main pipe; 4. Gas-side main pipe; 5. Indoor unit; 6. Low-pressure gas pipe; 7. Mode converter;

[0060] 101. Compressor; 102. Four-way valve; 103. Outdoor heat exchanger; 104. Heating electronic expansion valve; 105. Subcooler electronic expansion valve; 106. Subcooler; 107. Gas-liquid separator; 108. Separator; 109. Heating four-way valve;

[0061] 201, Accumulator; 201a, First end; 201b, Second end; 202, First gas pipe; 203, First liquid pipe; 204, Second liquid pipe; 205, Accumulation electronic expansion valve; 206, First cold release solenoid valve; 207, Cold storage solenoid valve; 208, Liquid pipe bypass solenoid valve; 209, Second cold release solenoid valve; 210, Third cold release solenoid valve; 211, Refrigerant pump; 212, Heating refrigerant pump; 215, Gas pipe bypass solenoid valve; 216, Third liquid pipe; 5011, First indoor unit heat exchanger; 5012, First indoor unit electronic expansion valve; 5021, Second indoor unit heat exchanger; 5022, Second indoor unit electronic expansion valve; 5031, Third indoor unit heat exchanger; 5032, Third indoor unit electronic expansion valve; 5041, Fourth indoor unit heat exchanger; 5042, Fourth indoor unit electronic expansion valve. Detailed Implementation

[0062] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0063] like Figures 1 to 13 As shown, an embodiment of this utility model provides an air conditioning system, which can also be called an energy storage air conditioning system, including an outdoor unit module, an energy storage module, an indoor unit module, a liquid-side main pipe 3, a gas-side main pipe 4, and a pump body structure; the first end 201a of the outdoor unit module can be selectively connected or disconnected from the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the second end 201b of the outdoor unit module can be selectively connected or disconnected from the second end 201b of the indoor unit module through the gas-side main pipe 4; the first end 201a of the energy storage module can be selectively connected or disconnected from the first end 201a of the outdoor unit module through the liquid-side main pipe 3, and the first end 201a of the energy storage module... Terminal 201a can be selectively connected or disconnected from the first terminal 201a of the indoor unit module via the liquid-side main pipe 3; the second terminal 201b of the energy storage module can be selectively connected or disconnected from the second terminal 201b of the outdoor unit module via the gas-side main pipe 4, and the second terminal 201b of the energy storage module can be selectively connected or disconnected from the second terminal 201b of the indoor unit module via the gas-side main pipe 4; the first terminal 201a of the pump body structure can be selectively connected or disconnected from one end of the energy storage module via the liquid-side main pipe 3, and the second terminal 201b of the pump body structure can be selectively connected or disconnected from the first terminal 201a of the indoor unit module via the liquid-side main pipe 3.

[0064] This system, through flexible connection methods, can adjust the refrigerant flow path according to different operating modes, achieving energy storage and release functions. In principle, by controlling the on / off switching of the solenoid valve and electronic expansion valve, the system can achieve refrigerant circulation between the accumulator 201, outdoor unit 1, and indoor unit 5, thereby achieving cooling, heating, or energy storage in different modes. In terms of effectiveness, the technical solution in this embodiment, by optimizing the refrigerant circulation path, enables the utilization of the cooling or heating capacity of the accumulator 201 during peak electricity prices, significantly reducing operating costs. In other embodiments, the system's energy storage capacity and efficiency can be further improved by adding more energy storage devices 2 or adjusting the pump structure. Furthermore, the pump structure configuration allows the pump to provide the power for refrigerant circulation, thus enabling the compressor 101 to remain inactive under certain conditions, effectively reducing system energy consumption.

[0065] Specifically, by replacing the compressor 101 with a refrigerant pump in the energy storage system, the power consumption of the compressor 101 can be effectively reduced. Multiple modes can be switched in combination for cooling / heating. Furthermore, a method using peak electricity prices as the criterion for mode switching can be combined. Additionally, a method and reason for mode switching based on the temperature of the energy storage unit 201 can also be used.

[0066] Specifically, the outdoor unit module can also be called outdoor unit 1, the indoor unit module can also be called indoor unit 5, and the energy storage module can also be called energy storage device 2.

[0067] In this embodiment, the outdoor unit module includes a compressor 101; wherein, when the compressor 101 is off, at least a portion of the pump structure is activated to pump; when the compressor 101 is on, the pump structure is off. Through the alternating operation of the compressor 101 and the pump structure, the system can provide circulating power in different modes. The compressor 101 operates in conventional cooling or heating mode, while the pump structure provides power in energy storage and release mode, replacing the compressor 101. In principle, the pump structure activates when the compressor 101 is off, ensuring the circulation of refrigerant in the system, thereby realizing the release of cold or heat from the energy storage 201. In terms of effectiveness, the technical solution in this embodiment significantly reduces the system's energy consumption and operating costs by reducing the operating time of the compressor 101. In other embodiments, different types of pump structures, such as a dual-fluorine pump system, can be used to further optimize the operating mode and energy consumption.

[0068] Specifically, the pump structure includes a first refrigerant pump, the pumping direction of which is from the first end 201a of the liquid-side main pipe 3 to the first end 201a of the indoor unit module; the air conditioning system has a full ice storage and release cooling mode; when the air conditioning system is in the full ice storage and release cooling mode, the first refrigerant pump is turned on and the compressor 101 is turned off, the first end 201a of the first refrigerant pump is connected to one end of the energy storage module through the liquid-side main pipe 3, the second end of the first refrigerant pump is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3, the first end 201a of the outdoor unit module is disconnected from the first end 201a of the indoor unit module, the second end 201b of the outdoor unit module is disconnected from the second end 201b of the indoor unit module, the first end 201a of the energy storage module is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the second end 201b of the energy storage module is connected to the second end 201b of the indoor unit module through the gas-side main pipe 4. In this mode, the first refrigerant pump replaces the compressor 101, providing circulating power for the system in full ice storage and heat release mode, enabling the utilization of the cooling capacity stored in the accumulator 201 during peak electricity prices. In principle, the operating direction of the first refrigerant pump ensures that the refrigerant flows from the accumulator 201 to the indoor unit 5 for heat release. In terms of effectiveness, the technical solution in this embodiment significantly reduces operating costs while ensuring the system's cooling performance by operating the first refrigerant pump in full ice storage and heat release mode. Specifically, the first refrigerant pump can be a refrigerant pump 211.

[0069] In other embodiments, different operating modes and functions can be achieved by adjusting the pumping direction of the first fluorine pump or by adding a second fluorine pump.

[0070] In this embodiment, the air conditioning system also has a subcooling release mode; when the air conditioning system is in the subcooling release mode, the first refrigerant pump is turned off and the compressor 101 is turned on; the first end 201a of the outdoor unit module is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the second end 201b of the outdoor unit module is connected to the second end 201b of the indoor unit module through the gas-side main pipe 4; the first end 201a of the energy storage module is connected or disconnected from the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the first end 201a of the energy storage module is connected to or disconnected from the first end 201a of the indoor unit module through the liquid-side main pipe 3. The second terminal 201b can be selectively connected or disconnected from the second terminal 201b of the outdoor unit module via the gas-side main pipe 4. The air conditioning system also includes a control module, which is configured to: when the air conditioning system is in the full ice storage and release mode, if the temperature of the energy storage module is lower than a first preset temperature, keep the air conditioning system in the full ice storage and release mode; when the temperature of the energy storage module is greater than or equal to the first preset temperature, switch the air conditioning system to the subcooling and release mode. The subcooling and release mode, through the operation of the compressor 101 and the connection status of the energy storage module, enables the compressor 101 to subcool the refrigerant when the cooling capacity of the energy storage 201 is insufficient to meet the demand, thereby improving the cooling effect. In principle, the control module automatically switches the operating mode according to the temperature change of the energy storage module, ensuring efficient operation of the system under different electricity prices and load conditions. In terms of effect, the technical solution in this embodiment improves the cooling capacity of the system by operating the compressor 101 in the subcooling and release mode, and optimizes the operating cost by switching modes. In other embodiments, mode switching can be controlled more precisely by introducing additional temperature sensors or adjusting preset temperatures, thereby improving system response speed and energy efficiency.

[0071] Specifically, the air conditioning system also has a conventional cooling mode; when the air conditioning system is in the conventional cooling mode, the first refrigerant pump is turned off and the compressor 101 is turned on; the first end 201a of the outdoor unit module is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the second end 201b of the outdoor unit module is connected to the second end 201b of the indoor unit module through the gas-side main pipe 4; the first end 201a of the energy storage module is disconnected from the outdoor unit module through the liquid-side main pipe 3, and the second end 201b of the energy storage module is disconnected from the gas-side main pipe 4; the control module is configured to: when the air conditioning system is in the subcooling release mode, if the temperature of the energy storage module is less than the second preset temperature, keep the air conditioning system in the subcooling release mode; when the air conditioning system is in the subcooling release mode, if the temperature of the energy storage module is greater than or equal to the second preset temperature, switch the air conditioning system back to the conventional cooling mode; the second preset temperature is greater than the first preset temperature. In the conventional cooling mode, the refrigerant circulates between the outdoor unit 1 and the indoor unit 5 through the direct operation of compressor 101, providing a cooling effect. In principle, the control module automatically determines when to switch from the subcooling release mode to the conventional cooling mode based on the temperature changes of the energy storage module, ensuring that the system can immediately restore its cooling capacity when the energy storage 201's cooling capacity is depleted. In terms of effectiveness, the technical solution in this embodiment provides a stable cooling effect by operating compressor 101 in conventional cooling mode, while optimizing operating costs through mode switching. In other embodiments, the system can adapt to different operating environments and needs by adjusting the preset temperature or introducing additional control logic, thereby improving system flexibility and energy efficiency.

[0072] In this embodiment, the air conditioning system further includes a control module, which is configured to: control the air conditioning system to be in the full ice storage and cooling mode when the electricity price is at its peak; and / or, control the air conditioning system to operate and enable the energy storage module to store cold energy when the electricity price is at its low point.

[0073] When electricity prices are at their peak, the system enters a full-storage ice-release cooling mode, utilizing the cold energy stored in the energy storage modules for cooling, thus avoiding energy consumption during periods of high electricity prices. When electricity prices are at their lowest, the system operates and stores cold energy to provide a reserve for subsequent periods of high electricity prices. In terms of effectiveness, the technical solution in this embodiment significantly reduces operating costs while ensuring the system's cooling performance through monitoring electricity price signals and mode switching. In other embodiments, the system's operating strategy can be further optimized by introducing additional electricity price prediction algorithms or adjusting the capacity of the energy storage modules, thereby improving the peak-shaving and valley-filling effect.

[0074] Specifically, the pump body structure includes a second refrigerant pump, the pumping direction of which is from the first end 201a of the indoor unit module to the first end 201a of the liquid-side main pipe 3; the air conditioning system has an energy storage and heat release mode; when the air conditioning system is in the energy storage and heat release mode, the second refrigerant pump is turned on, the compressor 101 is turned off, the first end 201a of the outdoor unit module is disconnected from the liquid-side main pipe 3, and the second end 201b of the outdoor unit module is disconnected from the second end 201b of the gas-side main pipe 4; the first end 201a of the energy storage module is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the second end 201b of the energy storage module is connected to the second end 201b of the indoor unit module through the gas-side main pipe 4; the first end 201a of the second refrigerant pump is connected to one end of the energy storage module through the liquid-side main pipe 3, and the second end 201b of the pump body structure is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3. In this mode, the second refrigerant pump replaces the compressor 101, providing circulating power for the system in the energy storage and heat release mode, enabling the utilization of heat stored in the accumulator 201 during peak electricity prices. In principle, the operating direction of the second refrigerant pump ensures that the refrigerant flows from the indoor unit 5 to the accumulator 201 for heat release. In terms of effectiveness, the technical solution in this embodiment significantly reduces operating costs while ensuring the system's heating performance by operating the second refrigerant pump in the energy storage and heat release mode. Specifically, the second refrigerant pump can be a heating refrigerant pump.

[0075] In other embodiments, different operating modes and functions can be achieved by adjusting the pumping direction of the second fluorine pump or by adding additional pump body structures.

[0076] In this embodiment, the air conditioning system also has a conventional heating mode; when the air conditioning system is in the conventional heating mode, the second refrigerant pump is turned off and the compressor 101 is turned on; the first end 201a of the outdoor unit module is connected to the first end 201a of the indoor unit module through the liquid-side main pipe 3, and the second end 201b of the outdoor unit module is connected to the second end 201b of the indoor unit module through the gas-side main pipe 4; the first end 201a of the energy storage module is disconnected from the outdoor unit module through the liquid-side main pipe 3, and the second end 201b of the energy storage module is disconnected from the gas-side main pipe 4; the air conditioning system also includes a control module, which is configured to: when the air conditioning system is in the energy storage and heat release mode, if the temperature of the energy storage module is greater than a third preset temperature, keep the air conditioning system in the energy storage and heat release mode; when the air conditioning system is in the energy storage and heat release mode, if the temperature of the energy storage module is less than or equal to the third preset temperature, switch the air conditioning system back to the conventional heating mode. In the conventional heating mode, the refrigerant circulates between the outdoor unit 1 and the indoor unit 5 through the direct operation of compressor 101, providing heating. In principle, the control module automatically determines when to switch from the energy storage and heat release mode to the conventional heating mode based on the temperature changes of the energy storage module, ensuring that the system can immediately restore heating capacity when the heat in the energy storage module 201 is depleted. In terms of effectiveness, the technical solution in this embodiment provides a stable heating effect by operating compressor 101 in conventional heating mode, while optimizing operating costs through mode switching. In other embodiments, the system can adapt to different operating environments and needs by adjusting the preset temperature or introducing additional control logic, thereby improving system flexibility and energy efficiency.

[0077] Specifically, the control module is further configured to: when the air conditioning system is in the conventional heating mode, control the air conditioning system to enter the defrosting mode when the defrosting conditions are met; and / or, when the electricity price at which the air conditioning system is operating is at its peak, control the air conditioning system to enter the energy storage and heat release mode; and / or, when the electricity price is at its low point, control the air conditioning system to operate and enable the energy storage module to store heat.

[0078] Specifically, the control module automatically adjusts the air conditioning system's operating mode by monitoring defrosting conditions and electricity price signals to achieve defrosting and peak shaving / valley filling effects. In principle, when defrosting conditions are met, the system enters defrosting mode, using the heat generated by the compressor 101 to defrost the outdoor heat exchanger 103. When electricity prices are at their peak, the system enters energy storage and heat release mode, using the heat stored in the energy storage module for heating, avoiding energy consumption during periods of high electricity prices. When electricity prices are at their lowest, the system operates and stores heat, providing a heat reserve for subsequent periods of high electricity prices. In terms of effectiveness, the technical solution in this embodiment significantly reduces operating costs through monitoring defrosting conditions and electricity price signals and mode switching, while ensuring the system's heating effect and defrosting capability. In other embodiments, the system's operating strategy can be further optimized by introducing additional defrosting algorithms or adjusting the capacity of the energy storage module, thereby improving the peak shaving / valley filling and defrosting effects.

[0079] In this embodiment, the connection point between the first end 201a of the energy storage module and the liquid-side main pipe 3 is the first connection end. The energy storage air conditioning system further includes a branch circuit and a switching unit. One end of the branch circuit is connected to the portion of the liquid-side main pipe 3 located between the first connection end and the first end 201a of the indoor unit module. The other end of the branch circuit is connected to the portion of the liquid-side main pipe 3 located between one end of the branch circuit and the indoor unit module. At least a portion of the pump structure is disposed on the branch circuit, and the at least portion of the pump structure has a pumping state for pumping fluid and a shut-off state for stopping operation. The switching unit is disposed on the branch circuit and can be switched on and off. The setting of the branch circuit and the control of the pump structure realize the flexible distribution of refrigerant between the energy storage module and the indoor unit module, improving the operating efficiency and flexibility of the system. In principle, the on / off control of the switching unit can selectively open or close the pump structure according to different operating modes to ensure the correct flow direction of the refrigerant. In terms of effectiveness, the technical solution in this embodiment achieves efficient utilization of refrigerant in different modes by setting up branch circuits and controlling the pump structure, thereby improving the system's energy efficiency and optimizing operating costs. In other embodiments, the system's flexibility and energy efficiency can be further improved by adjusting the number of branch circuits or the type of pump structure.

[0080] In one embodiment, there is one diversion branch, and the pump body structure includes a first fluorine pump, which is disposed on the diversion branch. The first fluorine pump has a first fluorine pumping state and a first shut-off state. When the first fluorine pump is in the first fluorine pumping state, the fluid in the diversion branch flows from one end of the diversion branch to the other end of the diversion branch.

[0081] In another embodiment, the diversion branch is a single branch, and the pump body structure includes a second fluorine pump disposed on the diversion branch. The second fluorine pump has a second fluorine pumping state and a second shut-off state. When the second fluorine pump is in the second fluorine pumping state, the fluid in the diversion branch flows from the other end of the diversion branch to one end of the diversion branch.

[0082] In another embodiment, there are two flow branches, and the pump body structure includes a first fluorine pump and a second fluorine pump. The first fluorine pump is disposed on one of the flow branches and has a first fluorine pumping state and a first closed state. When the first fluorine pump is in the first fluorine pumping state, the fluid in the flow branch flows from one end of the flow branch to the other end of the flow branch. The second fluorine pump is disposed on the other flow branch and has a second fluorine pumping state and a second closed state. When the second fluorine pump is in the second fluorine pumping state, the fluid in the flow branch flows from the other end of the flow branch to one end of the flow branch.

[0083] By setting up one or two branch lines and configuring different refrigerant pumps on each branch line, the system can flexibly control the refrigerant flow direction according to different operating modes, improving the system's operating efficiency and flexibility. In principle, the pumping and shut-off states of the first and second refrigerant pumps ensure the correct flow of refrigerant between the energy storage module and the indoor unit module, thereby achieving functions such as energy storage, energy release, cooling, and heating. In terms of effectiveness, the technical solution in this embodiment achieves efficient refrigerant utilization by setting up branch lines and controlling the refrigerant pumps, improving the system's energy efficiency and optimizing operating costs. In other embodiments, the system's flexibility and energy efficiency can be further improved by adjusting the number or type of refrigerant pumps and the layout of the branch lines.

[0084] This invention proposes a multifunctional air conditioning system capable of providing energy storage and release services for various power load transfer scenarios. The air conditioning system includes a refrigerant pump 211. One end of the refrigerant pump 211 is connected to the first end 201a of an energy accumulator via a liquid-side main pipe 3 and a third liquid pipe 216, and to the second end 201b of the energy accumulator via the liquid-side main pipe 3 and a first gas pipe 202. The system is also connected to the outdoor unit 5 via the liquid-side main pipe 3. The other end of the refrigerant pump 211 is connected to the indoor unit. During peak electricity prices in the cooling season, the refrigerant pump 211 can replace the compressor to provide system circulation power for a certain period. During this period, the energy storage device 2 undertakes all the system's load demands, achieving the effect of saving operating costs.

[0085] The first refrigerant pump can be a refrigerant pump 211, the corresponding outdoor unit is the outdoor unit module, and the energy storage module can also be called an energy storage device or energy storage equipment.

[0086] The air conditioning system includes an energy storage device 2. The first end 201a of the energy storage device 2 is connected to the liquid-side main pipe 3 via a first liquid pipe 203 and a third liquid pipe 216. The second end 201b of the energy storage device is connected to the first liquid pipe 203 via a second liquid pipe 204 and a first gas pipe 202. An energy storage electronic expansion valve 205 is arranged on the first liquid pipe 203, a first cold release solenoid valve 206 is arranged on the third liquid pipe 216, a second cold release solenoid valve 209 is arranged on the second liquid pipe 204, and a cold storage solenoid valve 207 is arranged on the first gas pipe 202. A liquid pipe bypass solenoid valve 208 is also arranged between the junction of the first liquid pipe 203 and the liquid-side main pipe 3 and between the junction of the third liquid pipe 216 and the liquid-side main pipe 3.

[0087] The energy storage device 2 is filled with energy storage material and equipped with refrigerant pipes. The refrigerant flows in the pipes and exchanges heat fully with the energy storage material, which can both store and release cold or store and release heat.

[0088] By switching valves, nine functions can be achieved, including conventional cooling, complete cold storage, simultaneous cooling and cold storage, subcooling release, full ice storage release, conventional heating, complete heat storage, simultaneous heating and heat storage, and defrosting upon heat release. During the cooling season, when electricity prices are low, the energy storage device stores cold; when electricity prices are at their peak, it releases full ice. Since the refrigerant pump 211 cannot have any gas passing through, otherwise it will be damaged, the full ice storage release time ends when the temperature of the energy storage device 2 rises to T1 (at this time, the temperature of the accumulator water tank should be sufficient to cool the low-temperature, low-pressure refrigerant gas from the indoor unit to a subcooled refrigerant liquid with a certain degree of subcooling Δt). In this mode, the accumulator can handle all the cooling output, and the system does not need to start the compressor; only the refrigerant pump is turned on for cooling. Because the refrigerant pump consumes far less energy than the compressor, it can significantly reduce power consumption. When the accumulator temperature rises to T1, the refrigerant pump 211 cannot guarantee that the refrigerant flowing through it is in a liquid state, but some cold energy in the accumulator has not been fully released. The system enters the subcooling release mode to continue releasing the cold energy stored in the accumulator. At this time, the outdoor unit compressor needs to be turned on, which can reduce power consumption to some extent. When the accumulator temperature rises to T2, it can be considered that the cold energy in the accumulator has been fully released, and the system can enter the normal cooling mode. If the electricity price is not at its peak, the full ice storage release mode is skipped, and the system directly enters the subcooling release mode. The specific control method is as follows. Figure 14 .

[0089] Overall, this multi-functional energy storage air conditioning system can effectively reduce operating costs and improve comfort for various application scenarios. The specific valve opening and closing settings are shown in the table below:

[0090]

[0091] Normal cooling mode:

[0092] The four-way valve 102 is de-energized. The liquid bypass solenoid valve 208, the third cold release solenoid valve 210, and the heating electronic expansion valve 104 open; the first cold release solenoid valve 206, the cold storage solenoid valve 207, the second cold release solenoid valve 209, and the first cold release solenoid valve 206 close; the refrigerant pump 211 shuts off; and the compressor 101 starts. The refrigerant discharged from the compressor 101 condenses in the outdoor heat exchanger 103 and enters the indoor unit 5 through the liquid-side main pipe 3 for evaporative cooling. It then returns to the suction side of the compressor 101 through the gas-side main pipe 4 and the gas-liquid separator 107. At this time, the energy storage device 2 is not used; only the conventional cooling function is achieved. The indoor unit 5 can also be called the indoor unit module.

[0093] Full cooling mode:

[0094] The four-way valve 102 is de-energized. The energy storage electronic expansion valve 205 and the heating electronic expansion valve 104 open, the first cold release solenoid valve 206, the second cold release solenoid valve 209, and the third cold release solenoid valve 210 close, the cold storage solenoid valve 207 opens, the refrigerant pump 211 closes, and the compressor starts. The refrigerant discharged by the compressor 101 condenses in the outdoor heat exchanger 103 and enters the liquid-side main pipe 3. After being throttled at the cold storage solenoid valve 207 via the first liquid pipe 203, it enters the energy storage device 2 for evaporation, storing the cooling capacity in the energy storage device 2. Then, it returns to the gas-liquid separator 107 and the suction side of the compressor 101 via the gas-side main pipe 4. In this mode, the energy storage device 2 acts as the evaporator, and the outdoor heat exchanger 103 acts as the condenser.

[0095] Cooling and cold storage mode:

[0096] The four-way valve 102 is de-energized. The liquid bypass solenoid valve 208, cold storage solenoid valve 207, third cold release solenoid valve 210, heating electronic expansion valve 104, and energy storage electronic expansion valve 205 open; the first cold release solenoid valve 206 and the second cold release solenoid valve 209 close; the refrigerant pump 211 shuts off; and the compressor starts. The refrigerant discharged by the compressor 101 condenses in the outdoor heat exchanger 103 and enters the liquid-side main pipe 3, splitting into two paths. One path flows through the first liquid pipe 203 and the energy storage electronic expansion valve 205 into the energy storage device 2 for evaporation, storing the cold energy in the energy storage device 2, and then flows into the first gas pipe 202. The other path enters the indoor unit 5 for evaporation and cooling. The two paths converge at the gas-side main pipe 4 and return to the gas-liquid separator 107 and the suction side of the compressor 101. The energy storage device 2 and the indoor unit 5 simultaneously act as evaporators; the energy storage device 2 stores cold energy, and the indoor unit 5 provides cooling to the room.

[0097] Supercooling and release mode:

[0098] The four-way valve 102 is de-energized. The heating electronic expansion valve 104, the first cold-releasing solenoid valve 206, the second cold-releasing solenoid valve 209, and the third cold-releasing solenoid valve 210 open; the cold storage solenoid valve 207, the liquid pipe bypass solenoid valve 208, and the energy storage electronic expansion valve 205 close; the refrigerant pump 211 closes; and the compressor starts. The refrigerant discharged from the compressor 101 condenses in the outdoor heat exchanger 103, enters the energy storage device 2 through the liquid-side main pipe 3 and the second liquid pipe 204, undergoes subcooling, flows through the third liquid pipe 216 and the liquid-side main pipe 3, flows into the indoor unit 5, evaporates, and then returns to the suction side of the compressor 101 through the gas-side main pipe 4 and the gas-liquid separator 107. The energy storage device 2 acts as a subcooler, releasing cold energy to the condensed refrigerant, further increasing its subcooling degree and enhancing its cooling capacity.

[0099] Full-storage ice release cooling mode:

[0100] The four-way valve 102 is de-energized. The first cold release solenoid valve 206 and the cold storage solenoid valve 207 open, while the liquid bypass solenoid valve 208, the second cold release solenoid valve 209, the third cold release solenoid valve 210, and the energy storage electronic expansion valve 205 close. The refrigerant pump 211 starts, and the compressor 101 stops. The refrigerant delivered by the refrigerant pump 211 flows into the indoor unit through the liquid side main pipe 3 for evaporation, then enters the energy storage device 2 through the gas side main pipe 4 and the first gas pipe 202. After condensation and heat exchange, it flows through the third liquid pipe 216 and back to the refrigerant pump 211. The refrigerant pump 211 replaces the compressor, providing circulating power to the system. Since the energy consumption of the refrigerant pump is much lower than that of the compressor, operating costs are saved. The energy storage device 2 acts as a condenser, releasing cooling energy to the gaseous refrigerant after evaporation and heat exchange, thus bearing the entire load demand of the system.

[0101] Standard heating mode:

[0102] The four-way valve 102 is energized. The first cold release solenoid valve 206, the cold storage solenoid valve 207, the second cold release solenoid valve 209, and the energy storage electronic expansion valve 205 are closed. The liquid bypass solenoid valve 208, the third cold release solenoid valve 210, and the heating electronic expansion valve 104 are opened. The refrigerant pump 211 is closed, and the compressor is turned on. The refrigerant discharged by the compressor 101 flows into the indoor unit through the gas side main pipe 4. After condensing and heating, it enters the outdoor heat exchanger 103 through the liquid side main pipe 3 for evaporation, and returns to the suction side of the compressor 101 through the gas-liquid separator 107. At this time, the energy storage device 2 is not used, and only the conventional heating cycle function is realized.

[0103] Full heat storage mode:

[0104] The four-way valve 102 is energized. The cold storage solenoid valve 207, the heating electronic expansion valve 104, and the energy storage electronic expansion valve 205 open; the first cold release solenoid valve 206, the liquid pipe bypass solenoid valve 208, the second cold release solenoid valve 209, and the third cold release solenoid valve 210 close; the refrigerant pump 211 closes; and the compressor starts. The refrigerant discharged from the compressor 101 enters the energy storage device 2 via the gas-side main pipe 4 for condensation, thus storing heat. It then enters the liquid-side main pipe 3 through the energy storage electronic expansion valve 205 and the first liquid pipe 203, and then enters the outdoor heat exchanger 103 for evaporation, returning to the gas-liquid separator 107 and the suction side of the compressor 101. In this mode, the energy storage device 2 acts as a condenser, and the outdoor heat exchanger 103 acts as an evaporator. The condensation process in the energy storage device 2 can be adjusted by controlling the opening degree of the energy storage electronic expansion valve 205.

[0105] Heating and heat storage mode:

[0106] The four-way valve 102 is energized. The first and second cold-releasing solenoid valves 206 and 209 are closed, while the cold storage solenoid valve 207, the liquid bypass solenoid valve 208, the heating electronic expansion valve 104, and the energy storage electronic expansion valve 205 are opened. The refrigerant pump 211 is closed, and the compressor is started. The refrigerant discharged from the compressor 101 is divided into two paths in the gas-side main pipe 4. One path enters the energy storage device 2 through the first gas pipe 202 for condensation, thereby storing heat. Then, it enters the liquid-side main pipe 3 through the energy storage electronic expansion valve 205 and the first liquid pipe 203. The other path enters the indoor unit 5 for condensation and heating, then enters the liquid-side main pipe 3 to merge with the first path of refrigerant. It then enters the outdoor heat exchanger 103 for evaporation and returns to the suction side of the compressor 101 via the gas-liquid separator 107. The energy storage device 2 and the indoor heat exchanger both act as condensers. The energy storage device 2 stores heat, and the indoor heat exchanger provides heat to the room. The refrigerant distribution between the two circuits can be adjusted by controlling the opening degree of the energy storage electronic expansion valve 205, and the condensation process in the energy storage device 2 can also be regulated.

[0107] Heat release and defrosting:

[0108] The four-way valve 102 is de-energized. The first refrigerant release solenoid valve 206, the liquid pipe bypass solenoid valve 208, the second refrigerant release solenoid valve 209, and the third refrigerant release solenoid valve 210 are closed. The energy storage electronic expansion valve 205 and the cold storage solenoid valve 207 are opened. The refrigerant pump 211 is closed, and the compressor 101 is turned on. The refrigerant discharged by the compressor 101 condenses in the outdoor heat exchanger 103, releasing heat to melt the frost layer on the outdoor heat exchanger 103. Then it enters the liquid-side main pipe 3, and after being throttled at the energy storage electronic expansion valve 205 through the first liquid pipe 203, it enters the energy storage device 2 for evaporation. Then it returns to the gas-liquid separator 107 and the suction side of the compressor 101 through the gas-side main pipe 4. In this mode, the energy storage device 2 acts as the evaporator, and the outdoor heat exchanger 103 acts as the condenser.

[0109] Specifically, when using a dual-fluorine pump structure: the system diagram is as follows. Figure 12 As shown: A heating refrigerant pump 212 is added to the single refrigerant pump system. The two refrigerant pumps are connected in parallel. The inlet of the heating refrigerant pump 212 is connected to the outlet of the refrigerant pump 211, and the outlet of the heating refrigerant pump 212 is connected to the inlet of the refrigerant pump 211. The dual-refrigerant pump system, in addition to possessing all the operating modes of the single-refrigerant pump, adds an energy storage and heat release mode. Figure 12 As shown. Specifically, the first fluorine pump is a refrigeration fluorine pump 211, and the second fluorine pump is a heating fluorine pump 212.

[0110] During the heating season, when electricity prices are low, the energy storage device can store heat. When electricity prices are high, it releases heat through hot water. In this process, the energy storage unit handles all the load demand without needing to start the compressor. The refrigerant pump consumes far less energy than the compressor, thus reducing operating costs. When the energy storage temperature is below T3, it exits the energy storage and heat release mode and enters the regular heating mode. Furthermore, if electricity prices are not at their peak, it directly enters the regular heating mode, with the control logic as follows: Figure 15 As shown.

[0111] Energy storage and heat release mode:

[0112] The four-way valve 102 is energized. The first cold-releasing solenoid valve 206 and the cold-storage solenoid valve 207 open, while the liquid bypass solenoid valve 208, the second cold-releasing solenoid valve 209, and the third cold-releasing solenoid valve 210 close, and the heating electronic expansion valve 104 and the energy storage electronic expansion valve 205 close. The refrigerant pump 211 and the compressor 101 close, and the heating refrigerant pump 212 opens. The heating refrigerant pump 212 transports the refrigerant flowing from the indoor unit to the energy storage device 2 for condensation and heat exchange via the third liquid pipe 216, and then flows into the indoor unit via the first gas pipe 202 and the gas-side main pipe 4. In this mode, the heating refrigerant pump 212 replaces the compressor, providing circulating power to the system. Since the energy consumption of the heating refrigerant pump is much lower than that of the compressor, operating costs are saved. The energy storage device 2 acts as an evaporator, providing heat to the liquid refrigerant after condensation and heat exchange, and undertaking the entire load demand of the system. The remaining functions of the dual-refrigerant pump system are the same as those of the single-refrigerant pump system.

[0113] Specifically, the energy storage air conditioning system in this embodiment also includes a subcooler electronic expansion valve 105 and a subcooler 106.

[0114] like Figure 11 As shown, the energy storage air conditioning system also includes a gas pipe bypass solenoid valve 215, a third liquid pipe 216, a first indoor unit heat exchanger 5011, a first indoor unit electronic expansion valve 5012, a second indoor unit heat exchanger 5021, a second indoor unit electronic expansion valve 5022, a third indoor unit heat exchanger 5031, a third indoor unit electronic expansion valve 5032, a fourth indoor unit heat exchanger 5041, and a fourth indoor unit electronic expansion valve 5042.

[0115] The air conditioning system in this embodiment is also compatible with three-pipe systems. The energy storage device uses a refrigerant pump, making it suitable not only for two-pipe air conditioning systems but also for three-pipe systems. Figure 13 As shown in the diagram. The outdoor unit of the three-pipe air conditioning system differs from the system structure shown in the main text in that it includes a liquid-side main pipe 3, a gas-side main pipe 4, a low-pressure gas pipe 6, a four-way valve 102 (used for cooling in the three-pipe system), and a heating four-way valve 109. The outdoor unit 1 and indoor unit 5 are connected via a mode converter 7 to achieve simultaneous cooling and heating on the indoor side. Based on this air conditioning system structure, an energy storage device 2 is connected between the liquid-side main pipe 3 and the low-pressure gas pipe 6. This energy storage device includes a refrigerant pump 211, connected in the same way as shown in the main text. The control of the refrigerant pump 211 is the same as shown in the previous embodiment. Furthermore, the three-pipe system in this embodiment also includes a separator 108 and a mode converter 7. The separator 108 in this embodiment is also used for gas-liquid separation.

[0116] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: In the technical solution of this application, the working process of the energy storage air conditioning system is to achieve automatic switching of different operating modes by controlling the solenoid valve, electronic expansion valve and pump body structure through the control module. In the normal cooling mode, the compressor is turned on, and the refrigerant condenses in the outdoor unit and enters the indoor unit through the liquid side main pipe for evaporative cooling, and then returns to the compressor through the gas side main pipe. In the full ice storage and heat release mode, the compressor is turned off, the first refrigerant pump is turned on, and the refrigerant flows from the accumulator to the indoor unit for evaporative cooling. At this time, the accumulator acts as a condenser, and the first refrigerant pump replaces the compressor to provide circulation power. In the subcooling and heat release mode, the compressor is turned on, the first refrigerant pump is turned off, the refrigerant condenses in the outdoor unit and is subcooled through the accumulator, and then enters the indoor unit for evaporative cooling. In the normal heating mode, the compressor is turned on, the refrigerant condenses and heats in the indoor unit, enters the outdoor unit through the liquid side main pipe for evaporation, and then returns to the compressor. In energy storage and heat release mode, the second refrigerant pump starts, the compressor stops, and the refrigerant flows from the indoor unit to the accumulator for condensation and heat exchange, then returns to the indoor unit via the second refrigerant pump. In defrost mode, the compressor starts, the refrigerant condenses in the outdoor unit, releasing heat to melt the frost on the outdoor heat exchanger, and then enters the indoor unit for evaporative cooling. During peak electricity prices, the system automatically switches to either full ice storage and heat release mode or energy storage and heat release mode, utilizing the stored cold or heat in the accumulator for cooling or heating, avoiding energy consumption during periods of high electricity prices. During off-peak electricity prices, the system automatically operates to store cold or heat, providing a reserve of cold or heat for subsequent periods of high electricity prices. Through this automatic switching of modes, the system can optimize operating costs under different electricity price and load conditions while ensuring cooling and heating performance. This solution addresses the drawback of previous energy storage systems that still required compressor operation in the cold release mode, resulting in high power consumption. It improves the peak shaving and valley filling effect of the energy storage system and enhances the versatility of energy storage applications. Based on a heat pump air conditioning system, this solution designs an energy storage air conditioning system that utilizes the energy storage system to achieve nine functions, including cold storage and cold release. By designing a refrigerant pump cold release system loop, it replaces the high-energy-consumption operation of the compressor, reducing operating costs. It also includes a control method for combined cooling with multiple mode switching.

[0117] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0118] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0119] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0120] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0121] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0122] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air conditioning system, characterized in that, It 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 pump body structure; The first end of the outdoor unit module can be selectively connected to or disconnected from the first end of the indoor unit module via the liquid-side main pipe, and the second end of the outdoor unit module can be selectively connected to or disconnected from the second end of the indoor unit module via the gas-side main pipe; The first end of the energy storage module can be selectively connected to or disconnected from 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 selectively connected to or disconnected from the first end of the indoor unit module through the liquid-side main pipe; The second end of the energy storage module can be selectively connected to or disconnected from the second end of the outdoor unit module via the gas-side main pipe, and the second end of the energy storage module can be selectively connected to or disconnected from the second end of the indoor unit module via the gas-side main pipe; The first end of the pump body structure can be selectively connected to or disconnected from one end of the energy storage module via the liquid-side main pipe, and the second end of the pump body structure can be selectively connected to or disconnected from the first end of the indoor unit module via the liquid-side main pipe.

2. The air conditioning system according to claim 1, characterized in that, The outdoor unit module includes a compressor; When the compressor is turned off, at least a portion of the pump body structure is activated to perform pumping. When the compressor is turned on, the pump body structure is in the closed state.

3. The air conditioning system according to claim 2, characterized in that, The pump body structure includes a first fluorine pump, and the pumping direction of the first fluorine pump is from the first end of the liquid-side main pipe to the first end of the indoor unit module; The air conditioning system has a full ice storage and release cooling mode. When the air conditioning system is in the full ice storage and release cooling mode, the first refrigerant pump is turned on and the compressor is turned off. The first end of the first refrigerant pump is connected to one end of the energy storage module through the liquid-side main pipe. The second end of the first refrigerant pump is connected to the first end of the indoor unit module through the liquid-side main pipe. The first end of the outdoor unit module is disconnected from the first end of the indoor unit module. The second end of the outdoor unit module is disconnected from the second end of the indoor unit module. The first end of the energy storage module is connected to the first end of the indoor unit module through the liquid-side main pipe. The second end of the energy storage module is connected to the second end of the indoor unit module through the gas-side main pipe.

4. The air conditioning system according to claim 3, characterized in that, The air conditioning system also has a subcooling release mode; when the air conditioning system is in the subcooling release mode, the first refrigerant pump is turned off and the compressor is turned on; 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 is connected or disconnected from the first end of the indoor unit module through the liquid-side main pipe, and the second end of the energy storage module is selectively connected or disconnected from the second end of the outdoor unit module through the gas-side main pipe; the air conditioning system also includes a control module, which is configured as follows: When the air conditioning system is in the full ice storage and cooling mode, if the temperature of the energy storage module is lower than the first preset temperature, the air conditioning system continues to be in the full ice storage and cooling mode. When the air conditioning system is in the full ice storage and cooling mode, if the temperature of the energy storage module is greater than or equal to the first preset temperature, the air conditioning system will continue to switch to the subcooling and cooling mode.

5. The air conditioning system according to claim 4, characterized in that, The air conditioning system also has a conventional cooling mode; when the air conditioning system is in the conventional cooling mode, the first refrigerant pump is turned off and the compressor is turned on; 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 is disconnected from the outdoor unit module via the liquid-side main pipe, and the second end of the energy storage module is disconnected from the gas-side main pipe; the control module is configured as follows: When the air conditioning system is in the subcooling release mode, if the temperature of the energy storage module is lower than the second preset temperature, the air conditioning system continues to be in the subcooling release mode. When the air conditioning system is in the subcooling release mode, if the temperature of the energy storage module is greater than or equal to the second preset temperature, the air conditioning system will continue to switch to the normal cooling mode. The second preset temperature is greater than the first preset temperature.

6. The air conditioning system according to claim 3, characterized in that, The air conditioning system also includes a control module, which is configured as follows: When the electricity price for the air conditioning system is at its peak, the air conditioning system is controlled to enter the full ice storage and cooling mode; and / or, When electricity prices are at their lowest, the air conditioning system is controlled to operate, and the energy storage module is made to store cold energy.

7. The air conditioning system according to claim 2, characterized in that, The pump body structure includes a second fluorine pump, and the pumping direction of the second fluorine pump is from the first end of the indoor unit module to the first end of the liquid side main pipe; The air conditioning system has an energy storage and heat release mode. When the air conditioning system is in the energy storage and heat release mode, the second refrigerant pump is turned on, the compressor is turned off, the first end of the outdoor unit module is disconnected from the liquid-side main pipe, and the second end of the outdoor unit module is disconnected from the second end of the gas-side main pipe. The first end of the energy storage module is connected to the first end of the indoor unit module through the liquid-side main pipe, and the second end of the energy storage module is connected to the second end of the indoor unit module through the gas-side main pipe. The first end of the second refrigerant pump is connected to one end of the energy storage module through the liquid-side main pipe, and the second end of the pump body structure is connected to the first end of the indoor unit module through the liquid-side main pipe.

8. The air conditioning system according to claim 7, characterized in that, The air conditioning system also has a conventional heating mode; when the air conditioning system is in the conventional heating mode, the second refrigerant pump is turned off and the compressor is turned on; 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 is disconnected from the outdoor unit module via the liquid-side main pipe, and the second end of the energy storage module is disconnected from the gas-side main pipe; the air conditioning system also includes a control module, which is configured as follows: When the air conditioning system is in the energy storage and heat release mode, if the temperature of the energy storage module is greater than the third preset temperature, the air conditioning system will continue to be in the energy storage and heat release mode. When the air conditioning system is in the energy storage and heat release mode, if the temperature of the energy storage module is less than or equal to the third preset temperature, the air conditioning system will continue to switch to the conventional heating mode.

9. The air conditioning system according to claim 8, characterized in that, The control module is also configured to: When the air conditioning system is in the conventional heating mode, and the defrosting conditions are met, the air conditioning system is controlled to enter the defrosting mode; and / or, When the electricity price for which the air conditioning system is operating is at its peak, the air conditioning system is controlled to enter the energy storage and heat release mode; and / or, When electricity prices are at their lowest, the air conditioning system is controlled to operate, and the energy storage module is made to store heat energy.

10. The air conditioning system according to claim 1, characterized in that, The connection point between the first end of the energy storage module and the liquid-side main pipe is the first connection end; the air conditioning system also includes: A diversion branch is provided, one end of which is connected to the portion of the liquid-side main pipe located between the first connection end and the first end of the indoor unit module, and the other end of which is connected to the portion of the liquid-side main pipe located between one end of the diversion branch and the indoor unit module. At least a portion of the pump body structure is provided on the diversion branch, and at least a portion of the pump body structure has a pumping state for pumping fluid and a shut-off state for stopping operation. A switching unit is disposed on the branch line, and the switching unit is configured to be switched on and off.

11. The air conditioning system according to claim 10, characterized in that, The diversion branch is singular, and the pump body structure includes a first fluorine pump, which is disposed on the diversion branch. The first fluorine pump has a first fluorine pumping state and a first shut-off state; wherein, when the first fluorine pump is in the first fluorine pumping state, the fluid in the diversion branch flows from one end of the diversion branch to the other end of the diversion branch; or... The diversion branch is singular, and the pump body structure includes a second fluorine pump, which is disposed on the diversion branch. The second fluorine pump has a second fluorine pumping state and a second off state; wherein, when the second fluorine pump is in the second fluorine pumping state, the fluid in the diversion branch flows from the other end of the diversion branch to one end of the diversion branch; or... The flow branch is divided into two sections. The pump body structure includes a first fluorine pump and a second fluorine pump. The first fluorine pump is disposed on one of the flow branch sections and has a first fluorine pumping state and a first closed state. When the first fluorine pump is in the first fluorine pumping state, the fluid in the flow branch flows from one end of the flow branch to the other end. The second fluorine pump is disposed on the other flow branch section and has a second fluorine pumping state and a second closed state. When the second fluorine pump is in the second fluorine pumping state, the fluid in the flow branch flows from the other end of the flow branch to one end of the flow branch.

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