CN218523696U

CN218523696U - Air conditioning system

Info

Publication number: CN218523696U
Application number: CN202223028438.XU
Authority: CN
Inventors: 袁帆; 熊建国; 张仕强; 陈敏
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-02-24
Anticipated expiration: 2032-11-15

Abstract

An air conditioning system is disclosed. The air conditioning system comprises a compressor, an outdoor heat exchanger, a liquid side header pipe, a gas side header pipe, an indoor heat exchanger, a four-way valve, an energy accumulator and a control valve assembly, wherein the energy accumulator is provided with a first port and a second port, the first port is respectively connected with the outdoor heat exchanger and the liquid side header pipe, and the second port is respectively connected with an air suction port of the compressor, the outdoor heat exchanger and an air exhaust port of the compressor. The four-way valve and the control valve component act to control the flow direction of the refrigerant and the on-off of the connecting pipeline so as to adjust the working states of the energy accumulator, the outdoor heat exchanger and the indoor heat exchanger and enable the air conditioning system to be switched among different working modes, the energy accumulator is in a first working state, and the refrigerant enters the energy accumulator from the first port and flows out through the second port; in the second working state, the refrigerant enters the energy accumulator from the second port and flows out from the first port. The air conditioning system meets diversified requirements of users.

Description

Air conditioning system

Technical Field

The present application relates to an air conditioning system.

Background

In order to relieve the discomfort caused by hot weather, people usually use an air conditioning system to reduce the indoor temperature and improve the comfort level of the indoor temperature.

At present, although the structure of the refrigerating machine is various, some air conditioning units also adopt the cold accumulation module, the working mode of the cold accumulation module is single, and the diversified requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

The application provides an air conditioning system to satisfy more demands of users.

The application provides an air conditioning system, which comprises a compressor, an outdoor heat exchanger, a liquid side header pipe, a gas side header pipe, an indoor heat exchanger, a four-way valve, an energy accumulator and a control valve assembly, wherein the indoor heat exchanger is connected with the liquid side header pipe and the gas side header pipe; the four-way valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with an exhaust port of the compressor, the second valve port is connected with the outdoor heat exchanger, the third valve port is connected with an air suction port of the compressor, and the fourth valve port is connected with an air side header pipe; the accumulator is provided with a first port and a second port, the first port is respectively connected with the outdoor heat exchanger and the liquid side main pipe in a switching mode, and the second port is respectively connected with the air suction port of the compressor, the outdoor heat exchanger and the air exhaust port of the compressor in a switching mode. The four-way valve and the control valve component act to adjust the working states of the energy accumulator, the outdoor heat exchanger and the indoor heat exchanger and enable the air conditioning system to be switched among different working modes, the energy accumulator has a first working state and a second working state, and in the first working state, a refrigerant enters the energy accumulator from the first port and flows out from the second port; in the second working state, the refrigerant enters the energy accumulator from the second port and flows out from the first port.

In some embodiments, a liquid separating device is disposed at the first port, and the refrigerant enters the accumulator through the liquid separating device.

In some embodiments, the air conditioning system includes a first pipe connected to the discharge port of the compressor, a first end of the second pipe connected to the first port of the accumulator, a second end of the second pipe connected to the outdoor heat exchanger, the second pipe connected to the first pipe at a first connection point, the first pipe being on-off disposable, and the second pipe being on-off disposable.

In some embodiments, the control valve assembly includes a first control valve disposed on the first tube, the first control valve configured to control the opening and closing of the first tube.

In some embodiments, the control valve assembly includes an energy storing throttling element disposed between the first connection point of the second tube and the first end thereof.

In some embodiments, the control valve assembly includes a second control valve disposed between the first connection point of the second pipe and the second end thereof, the second control valve configured to control the make and break of the line.

In some embodiments, the second port is connected to the second tube by a third tube, the second tube and the third tube are connected at a second connection point, and the second control valve is disposed between the second connection point and the second end of the second tube.

In some embodiments, the control valve assembly further comprises a third control valve disposed on the third tube, the third control valve configured to control the opening and closing of the third tube.

In some embodiments, the control valve assembly further comprises a throttling element connected in parallel across the third control valve, the opening of the throttling element being adjustably set.

In some embodiments, the air conditioning system further comprises a fourth pipe, the first port is connected with the liquid side main pipe through the fourth pipe, and the fourth pipe can be connected and disconnected.

In some embodiments, the control valve assembly further comprises a fourth control valve disposed on the fourth pipe, the fourth control valve being configured to control the opening and closing of the fourth pipe.

In some embodiments, the air conditioning system comprises a second pipe and a bypass pipe, a first end of the second pipe is connected with the first port, a second end of the second pipe is connected with the outdoor heat exchanger, a fourth pipe is connected with a second end of the second pipe through the bypass pipe, and the control valve assembly further comprises a bypass valve arranged on the bypass pipe and used for controlling the on-off of the bypass pipe.

In some embodiments, the air conditioning system further includes a fifth pipe, the control valve assembly further includes a fifth control valve disposed on the fifth pipe, the second port is connected to the suction port of the compressor through the fifth pipe, and the fifth control valve is configured to control on/off of the fifth pipe.

In some embodiments, the air conditioning system includes a first pipe, a second pipe, a third pipe, a fourth pipe, a fifth pipe and a bypass pipe, the control valve assembly includes a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, a bypass valve, an energy storage throttling element and an outdoor throttling element connected with the exhaust port of the compressor, the first control valve is disposed on the first pipe and configured to control the on-off of the first pipe, a first end of the second pipe is connected with the first port, a second end of the second pipe is connected with the outdoor heat exchanger, the second pipe is connected with the first pipe at a first connection point, the energy storage throttling element is disposed between the first connection point of the second pipe and the first end thereof, the second control valve is arranged between the first connecting point and the second end of the second pipe and is configured to control the on-off of the pipeline, the third control valve is arranged on the third pipe and is configured to control the on-off of the third pipe, the first port is connected with the liquid side header pipe through the fourth pipe, the fourth control valve is arranged on the fourth pipe and is configured to control the on-off of the fourth pipe, the fourth pipe is connected with the second end of the second pipe through the bypass pipe, the bypass valve is arranged on the bypass pipe and is configured to control the on-off of the bypass pipe, the second port is connected with the suction port of the compressor through the fifth pipe, the fifth control valve is arranged on the fifth pipe and is configured to control the on-off of the fifth pipe, the first end of the outdoor heat exchanger is connected with the second port of the four-way valve, and the second end of the outdoor heat exchanger is connected with the outdoor throttling element.

In some embodiments, the air conditioning system includes a first pipe connected to the fourth port of the four-way valve and a second pipe through which the first port is connected to the first pipe.

In some embodiments, the air conditioning system further includes a liquid storage tank having a first port connected to the liquid side manifold and a second port connected to the suction port of the compressor, the liquid storage tank having an off state, a refrigerant storage state, and a refrigerant release state.

In some embodiments, the air conditioning system further comprises an air balance valve disposed between the first port and the outdoor heat exchanger and a drain valve disposed between the second port and the suction port of the compressor, the air balance valve and the drain valve both being closed in the closed state; in the state of storing the refrigerant, the gas balance valve and the liquid discharge valve are both opened; in the state of releasing the refrigerant, the air balance valve is closed, and the liquid discharge valve is opened.

Based on the technical scheme that this application provided, air conditioning system can change the flow direction of refrigerant and/or the break-make of connecting line through operating four-way valve and control valve subassembly, with adjust outdoor heat exchanger, the state of indoor heat exchanger and energy storage ware, wherein, the energy storage ware has first operating condition and second operating condition, at first operating condition, the refrigerant gets into and flows out from the second port from first port, at second operating condition, the refrigerant gets into and flows out from first port from the second port, just so make the air conditioning system of this embodiment can switch between different working modes, and then satisfy user's diversified demand, promote user's use and experience.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a refrigerant flow path of the air conditioning system shown in fig. 1 in a normal cooling mode.

Fig. 3 is a schematic view of a refrigerant flow path in the air conditioning system shown in fig. 1 in the full cold storage mode.

Fig. 4 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in a cooling-while-storing mode.

Fig. 5 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in the supercooling cooling mode.

Fig. 6 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in a condensing and cooling mode.

Fig. 7 is a schematic diagram of refrigerant flow paths when the air conditioning system shown in fig. 1 is in the parallel cooling mode.

Fig. 8 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in a normal heating mode.

Fig. 9 is a schematic view of a refrigerant flow path in the air conditioning system shown in fig. 1 in the complete heat storage mode.

Fig. 10 is a schematic view of a refrigerant flow path in the air conditioning system shown in fig. 1 in the simultaneous heating and heat storage mode.

Fig. 11 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in a mixed heat release mode.

Fig. 12 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in the independent heat release mode.

Fig. 13 is a schematic view of a refrigerant flow path of the air conditioning system shown in fig. 1 in a defrosting mode.

Fig. 14 is a schematic structural diagram of an air conditioning system according to a first alternative embodiment of the present application.

Fig. 15 is a schematic structural view of an air conditioning system according to a second alternative embodiment of the present application.

Fig. 16 is a schematic structural view of an air conditioning system according to a third alternative embodiment of the present application.

Fig. 17 is a schematic structural view of an air conditioning system according to a fourth alternative embodiment of the present application.

Fig. 18 is a schematic structural view of an air conditioning system according to a fifth alternative embodiment of the present application.

Fig. 19 is a schematic view of the accumulator of fig. 18 in a refrigerant storage state.

Fig. 20 is a schematic view of the receiver of fig. 18 in a refrigerant relief state.

Fig. 21 is a schematic structural view of an air conditioning system according to a sixth alternative embodiment of the present application.

Fig. 22 is a schematic view of the receiver tank of fig. 21 in a state of storing refrigerant.

Fig. 23 is a schematic view of the accumulator shown in fig. 21 in a refrigerant releasing state.

Fig. 24 is a schematic structural view of an accumulator according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously positioned and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1, the air conditioning system of the embodiment of the present application includes a compressor 101, an outdoor heat exchanger 105, a liquid side manifold 3, a gas side manifold 4, an indoor heat exchanger, a four-way valve 104, an accumulator 201, and a control valve assembly.

Wherein, the indoor heat exchanger is connected with the liquid side manifold 3 and the gas side manifold 4. Four-way valve 104 has a first port, a second port, a third port, and a fourth port. The first valve port is connected with the exhaust port of the compressor 101, the second valve port is connected with the outdoor heat exchanger 105, the third valve port is connected with the suction port of the compressor 101, and the fourth valve port is connected with the air side header pipe 4.

The accumulator 201 has a first port 201a and a second port 201b. The first port 201a is connected to the outdoor heat exchanger 105 and the liquid-side header pipe 3 so as to be opened and closed, and the second port 201b is connected to the suction port of the compressor 101, the outdoor heat exchanger 105, and the discharge port of the compressor 101 so as to be opened and closed.

The four-way valve 104 and control valve assembly act to regulate the operating state of the accumulator 201, outdoor heat exchanger 105 and indoor heat exchanger and to switch the air conditioning system between different operating modes. The energy accumulator 201 has a first working state and a second working state, and in the first working state, the refrigerant enters the energy accumulator 201 from the first port 201a and flows out through the second port 201 b; in the second operating state, the refrigerant enters the accumulator 201 from the second port 201b and flows out through the first port 201b.

The air conditioning system of this application embodiment can change the flow direction of refrigerant and/or the break-make of connecting line through operating four-way valve 104 and control valve subassembly, with adjust outdoor heat exchanger 105, the state of indoor heat exchanger and energy storage 201, wherein, energy storage 201 has first operating condition and second operating condition, at first operating condition, the refrigerant gets into and flows out from second port 201b from first port 201a, at second operating condition, the refrigerant gets into and flows out from first port 201a from second port 201b, just so make the air conditioning system of this embodiment can switch between different mode, and then satisfy user's diversified demand, promote user's use and experience.

The accumulator 201 is filled with an energy storage material and is provided with a refrigerant pipeline. The refrigerant flows in the pipeline and fully exchanges heat with the energy storage material to realize energy storage or energy release. In this embodiment, the four-way valve 104 can switch between a cooling mode and a heating mode, and when the air conditioning system is in the cooling mode, the accumulator can store or release cold, and when the air conditioning system is in the heating mode, the accumulator can store or release heat.

As shown in fig. 24, the accumulator 201 includes an accumulator tank 2011 and a refrigerant coil 2012 provided inside the accumulator tank 2011. Refrigerant coil 2012 has first port 201a and second port 201b, and the air conditioning system of this application embodiment makes the refrigerant both can get into through first end 201a through the action of cross valve 104 and control valve group, also can get into through second end 201b, has realized the two-way refrigerant that advances of energy storage 201. Specifically, during cold accumulation and cold release, the flow direction of the refrigerant in the accumulator is opposite. Specifically, when cold accumulation is performed, the temperature of the refrigerant gradually rises along the flow, so that the temperature of the energy storage material in the energy accumulator is distributed from low to high when the cold accumulation is finished. When the refrigerant is released, the high-temperature refrigerant flows into the energy accumulator from the other end, and the flow direction is opposite. At the moment, along with the heat exchange with the energy storage material with the temperature distribution from high to low, the heat exchange can be more sufficient, the temperature of the obtained refrigerant is lower, and the effect is better.

Four-way valve 104 has a first port, a second port, a third port, and a fourth port. When the four-way valve 104 is powered off, the first valve port and the second valve port are communicated, and the third valve port and the fourth valve port are communicated. When the four-way valve 104 is energized, the first port is communicated with the fourth port, and the second port is communicated with the third port.

In some embodiments, referring to fig. 1, a dispensing device 214 is disposed at the first port 201 a. The refrigerant enters the accumulator 201 through the liquid separating device 214. The liquid separating device 214 is arranged at the first port 201a, so that uniform liquid separation can be ensured when liquid refrigerant enters the accumulator. Further, the accumulator of the present embodiment can realize bidirectional refrigerant feeding, such that the gaseous refrigerant enters the accumulator from the second port 201b without the liquid separating device, thereby reducing the pressure loss when the gaseous refrigerant enters the accumulator.

In some embodiments, the air conditioning system includes a first tube 202 and a second tube 204. The first pipe 202 is connected to the discharge port of the compressor 101. A first end of the second pipe 204 is connected to a first port of the accumulator 201, a second end of the second pipe 204 is connected to the outdoor heat exchanger 105, the second pipe 204 is connected to the first pipe 202 at a first connection point, the first pipe 202 is provided to be switchable, and the second pipe 204 is provided to be switchable. The high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 101 can flow to the second port 201b through the first pipe 202 and the second pipe 204, and then enter the accumulator 201 from the second port 201b, so that the accumulator of the present application realizes a heat storage function. And the gaseous refrigerant enters the accumulator 201 from the second port 201b to avoid a pressure loss caused by the entrance through the first port 201 a.

In some embodiments, the control valve assembly includes a first control valve 208 disposed on the first tube 202. The first control valve 208 is configured to control the opening and closing of the first pipe 202. When the gaseous refrigerant does not need to be introduced into the second port 201b, the first control valve 208 can be controlled to be closed; when the gaseous refrigerant needs to be introduced into the second port 201b, the first control valve 208 can be controlled to be opened.

In some embodiments, a first end of the second pipe 204 is connected to the first port 201a, and a second end of the second pipe 204 is connected to the outdoor heat exchanger 105. The second tube 204 is connected to the first tube 202 at a first connection point and the control valve assembly includes an energy charging restriction element 206 disposed between the first connection point of the second tube 204 and a first end thereof. The refrigerant flowing out of the outdoor heat exchanger 105 can be pressure-transformed by the energy storage throttling element 206 and then enters the energy accumulator 201.

In some embodiments, a first end of the second pipe 204 is connected to the first port 201a, and a second end of the second pipe 204 is connected to the outdoor heat exchanger 105. The second tube 204 is connected to the first tube 202 at a first connection point. The control valve assembly comprises a second control valve 207 arranged between the first connection point of the second pipe 204 and its second end, the second control valve 207 being configured to control the switching of the line. The second control valve 207 is provided to control whether the refrigerant flowing out of the outdoor heat exchanger 105 enters the accumulator 201 through the second pipe 204 and the energy storage throttling element 206. For example, when the second control valve 207 is opened, the refrigerant flowing out of the outdoor heat exchanger 105 may enter the accumulator 201 through the second pipe 204 and flow out of the second port 201b of the accumulator 201 to return to the compressor, where the accumulator may be used as an evaporator to implement a full cold storage mode, or the accumulator and the indoor heat exchanger may be used as an evaporator to implement a cooling and cold storage mode.

Specifically, the second control valve 207 may be a check valve as shown in fig. 1, in which case an inlet of the check valve is connected to the outdoor heat exchanger 105 and an outlet of the check valve is connected to the first connection point. The second control valve 207 may be a solenoid valve as shown in fig. 15, and the solenoid valve may be an on-off valve, which can more precisely control the on-off state between the second end of the second pipe 204 and the first connection point.

In some embodiments, the second port 201b is connected to the second pipe 204 through a third pipe 205, the second pipe 204 and the third pipe 205 are connected at a second connection point, and a second control valve 207 is disposed between the second connection point and the second end of the second pipe 204. Thus, the refrigerant flowing out of the outdoor heat exchanger 105 can reach the second port 201b of the accumulator through the second pipe 204 and the third pipe 205, and then enter the accumulator 201 through the second port 201b, at this time, the accumulator 201 can be used as a subcooler, the refrigerant condensed in the outdoor heat exchanger 105 releases cold, the supercooling degree of the refrigerant is further improved, and then the refrigerant flows into the indoor heat exchanger to be evaporated, the refrigerating capacity of the refrigerant is improved, and at this time, the air conditioning system enters a supercooling cold release mode.

In some embodiments, the control valve assembly further includes a third control valve 212 disposed on the third tube 205. The third control valve 212 is configured to control the on/off of the third pipe 205. The third control valve 212 may be a solenoid valve to facilitate control by the controller.

Referring to FIG. 16, in some embodiments, the control valve assembly further includes a throttling element 215 connected in parallel across the third control valve 212. The opening of the throttling element 215 is adjustably set. The throttling element 215 may be an electronic expansion valve. When the system is in the heat storage and heating mode or the parallel cooling mode, the flow rate of the refrigerant flowing to the accumulator and the indoor heat exchanger can be distributed by adjusting the opening degree of the throttling element 215.

In some embodiments, the air conditioning system further includes a fourth pipe 213, and the first port 201a is connected to the liquid-side manifold 3 through the fourth pipe 213. The fourth pipe 213 connects the first port 201a and the liquid-side header pipe 3, so that the refrigerant flows out of the first port 201a and flows into the interior heat exchanger through the liquid-side header pipe 3 when entering from the second port 201b.

In some embodiments, the control valve assembly further comprises a fourth control valve 209 disposed on the fourth pipe 213, the fourth control valve 209 being configured to control the opening and closing of the fourth pipe 213. The fourth control valve 209 may be a check valve or a solenoid valve, and specifically, as shown in fig. 1, the fourth control valve 209 is a check valve, an inlet of which is connected to the first port 201a and an outlet of which is connected to the liquid-side manifold 3. As shown in fig. 14, the fourth control valve 209 is an electromagnetic valve, and the electromagnetic valve is an on-off valve to control the on-off of the fourth pipe 213 more preferably.

In some embodiments, the air conditioning system includes a second duct 204 and a bypass duct. A first end of the second pipe 204 is connected to the first port 201a, a second end of the second pipe 204 is connected to the outdoor heat exchanger 105, and a fourth pipe 213 is connected to a second end of the second pipe 204 through a bypass pipe. The control valve assembly further comprises a bypass valve 211 arranged on the bypass pipe, and the bypass valve 211 is used for controlling the on-off of the bypass pipe. When the bypass valve 211 is opened, the refrigerant flowing out of the outdoor heat exchanger 105 may flow to the liquid-side header pipe 3 through the bypass pipe and enter the indoor heat exchanger, thereby implementing the normal cooling mode. When the bypass valve 211 is turned off, the refrigerant flowing out of the outdoor heat exchanger 105 cannot flow to the indoor side through the bypass valve 211, and at this time, the refrigerant can enter the accumulator through the second pipe 204 to realize complete cold storage. When the bypass valve 211 is opened and the second control valve 207 is opened, the refrigerant flowing out of the outdoor heat exchanger 105 may enter the indoor side through the bypass pipe, or may enter the accumulator through the second pipe 204 to perform cold storage and cooling.

In some embodiments, the air conditioning system further comprises a fifth pipe 203. The control valve assembly further includes a fifth control valve 210 disposed on the fifth pipe, the second port 201b is connected to the suction port of the compressor 101 through the fifth pipe 203, and the fifth control valve 210 is configured to control the on/off of the fifth pipe 203. The fifth pipe 203 realizes the connection between the second port 201b of the accumulator 201 and the suction port of the compressor 101, so that the refrigerant flowing out of the indoor heat exchanger 105 enters the accumulator 201 and flows out of the second port 201b thereof as shown in fig. 3, and then directly flows back to the suction port of the compressor 101 through the fifth pipe, thereby realizing a complete cold accumulation mode as shown in fig. 3, a cold accumulation and simultaneous cooling mode as shown in fig. 4, a mixed heat release mode as shown in fig. 11, an independent heat release mode as shown in fig. 12, and a defrosting mode as shown in fig. 13.

In some embodiments, as shown in fig. 1, the air conditioning system includes a first pipe 202, a second pipe 204, a third pipe 205, a fourth pipe 213, a fifth pipe, and a bypass pipe, the control valve assembly includes a first control valve 208, a second control valve 207, a third control valve 212, a fourth control valve 209, a fifth control valve 210, a bypass valve 211, an energy storage throttling element 206, and an outdoor throttling element 106, the first pipe 202 is connected to the discharge port of the compressor 101, the first control valve 208 is disposed on the first pipe 202 and configured to control on-off of the first pipe 202, a first end of the second pipe 204 is connected to the first port 201a, a second end of the second pipe 204 is connected to the outdoor heat exchanger 105, the second pipe 204 is connected to the first pipe 202 at a first connection point, the energy storage throttling element 206 is disposed between a first connection point of the second pipe 204 and a first end thereof, a second control valve 207 is provided between the first connection point and the second end of the second pipe 204 and configured to control opening and closing of the line, a third control valve 212 is provided on the third pipe 205 and configured to control opening and closing of the third pipe 205, a first port 201a is connected to the liquid-side header pipe 3 through a fourth pipe 213, a fourth control valve 209 is provided on the fourth pipe 213 and configured to control opening and closing of the fourth pipe 213, the fourth pipe 213 is connected to the second end of the second pipe 204 through a bypass pipe, a bypass valve 211 is provided on the bypass pipe and configured to control opening and closing of the bypass pipe, a second port 201b is connected to the suction port of the compressor 101 through a fifth pipe, a fifth control valve 210 is provided on the fifth pipe and configured to control opening and closing of the fifth pipe, a first end of the outdoor heat exchanger 105 is connected to the second port of the four-way valve 104, and a second end of the outdoor heat exchanger 105 is connected to the outdoor throttle element 106.

The throttling element of the various embodiments of the present application may be an electronic expansion valve.

The air conditioning system of the present embodiment can switch the twelve modes by controlling the operations of the four-way valve 104 and the control valves, and the control method of each mode will be described in detail below.

In the present embodiment, the operation modes of the air conditioning system include conventional refrigeration, complete cold accumulation, cold accumulation and simultaneous refrigeration, supercooling cold release, condensation cold release, parallel cold release, conventional heating, complete heat accumulation, heat accumulation and simultaneous heating, mixed heat release, independent heat release and defrosting.

Specifically, for the twelve modes, the actions of each valve are as follows:

the operation of the twelve modes of the air conditioning system will be described in detail below with reference to fig. 2 to 13 in conjunction with the above table.

As shown in fig. 2, when the air conditioning system is in the normal cooling mode,

with the four-way valve 104 de-energized, the bypass valve 211 and the outdoor throttling element 106 are opened, and the first control valve 208, the second control valve 207, the third control valve 212, the fifth control valve 210, the fourth control valve 209 and the charging throttling element 206 are closed. The refrigerant discharged from the discharge port of the compressor 101 passes through the outdoor heat exchanger 105 and the bypass pipe, enters the indoor unit through the liquid-side header pipe 3, evaporates in the indoor unit, and returns to the suction port of the compressor 101 through the gas-side header pipe 4 and the gas-liquid separator 102. At this time, the accumulator 201 does not operate, and only a normal refrigeration cycle function is realized.

As shown in fig. 3, when the air conditioning system is in the full cold storage mode,

with the four-way valve 104 de-energized, the second control valve 207, the fifth control valve 210, the charging restriction element 206, and the outdoor restriction element 106 are opened, and the bypass valve 211, the first control valve 208, the third control valve 212, and the fourth control valve 209 are closed. The refrigerant discharged from the compressor 101 is condensed in the outdoor heat exchanger 105, throttled in the energy storage throttle element 206 by the first liquid pipe 204, enters the energy storage 201, evaporated, and then returned to the gas-liquid separator 102 and the suction side of the compressor 101 through the fifth pipe 203. In this mode, the accumulator 201 acts as an evaporator, the outdoor heat exchanger 105 acts as a condenser, and the indoor heat exchanger does not operate. At this time, the two-phase refrigerant enters from the first end 201a of the accumulator 201 through the liquid separating device 214, and the evaporated gaseous refrigerant flows out from the second end 201b of the accumulator 201.

As shown in fig. 4, when the air conditioning system is in the cooling-while-cold storage mode,

four-way valve 104 is powered down. The bypass valve 211, second control valve 207, fifth control valve 210 and charge restriction element 206 are open and the outdoor restriction element 106 is open, and the first control valve 208, third control valve 212 and fourth control valve 209 are closed. The refrigerant discharged by the compressor 101 is condensed by the outdoor heat exchanger 105 and then divided into two paths, wherein one path enters the liquid side header pipe 3 and returns to the suction side of the compressor through the gas side header pipe 4 after being evaporated; the other path enters the accumulator 201 through the second pipe 204 and the energy storage throttling element 206, and flows into the fifth pipe 203 after being evaporated, and returns to the suction side of the compressor 101. In this mode, the accumulator 201 and the indoor heat exchanger simultaneously function as an evaporator, the accumulator 201 stores cold, and the indoor heat exchanger provides cold to the indoor. At this time, the two-phase refrigerant enters from the first end 201a of the accumulator 201 through the liquid separating device 214, and the evaporated gaseous refrigerant flows out from the second end 201b of the accumulator 201.

As shown in fig. 5, when the air conditioning system is in the supercooling cold release mode,

four-way valve 104 is powered down. The outdoor throttling element 106, the second control valve 207, the fourth control valve 209, and the third control valve 212 are open, and the bypass valve 211, the fifth control valve 210, the first control valve 208, and the charging throttling element 206 are closed. The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, passes through the second pipe 204 and the third pipe 205, enters the accumulator 201 through the second port 201b, is supercooled, then flows into the indoor heat exchanger through the fourth pipe 213 and the liquid-side header pipe 3, and is evaporated. After the evaporation, the refrigerant passes through the gas-side header pipe 4 and the gas-liquid separator 102 and returns to the suction side of the compressor 101. In this mode, the accumulator 201 serves as a subcooler, and releases cold to the refrigerant condensed in the outdoor heat exchanger 105, so that the refrigerant is further increased in supercooling degree and then flows into the indoor unit to be evaporated, thereby improving the refrigerating capacity of the refrigerant. At this time, the liquid refrigerant enters from the second end 201b of the accumulator 201, and the supercooled liquid refrigerant flows out from the first end 201a through the liquid separating device 214.

As shown in fig. 6, when the air conditioning system is in the condensing and cooling mode,

four-way valve 104 is powered down. The first control valve 208, the third control valve 212, and the fourth control valve 209 are open, and the outdoor throttling element 106, the bypass valve 211, the charging throttling element 206, the second control valve 207, and the fifth control valve 210 are closed. The refrigerant discharged from the compressor 101 enters the accumulator 201 through the first pipe 202, the second pipe 204, and the third pipe 205, is condensed, flows into the indoor unit through the fourth pipe 213 and the liquid-side header pipe 3, is evaporated, and returns to the suction side of the compressor 101 through the gas-side header pipe 4 and the gas-liquid separator 102. This mode does not use the outdoor heat exchanger 105 but uses the accumulator 201 as a condenser to provide cooling for the refrigeration cycle. Since the temperature of the cold storage material in the energy accumulator 201 is much lower than the outdoor ambient temperature, the refrigeration cycle can be operated under a low pressure ratio condition, and the load of the compressor 101 is greatly reduced. At this time, the gaseous refrigerant enters from the second end 201b of the accumulator 201, and the condensed liquid refrigerant flows out from the first end 201a through the liquid separator 214.

When the demand of greatly reducing the power consumption exists in a short time, the condensing and cooling function can be used, namely, the outdoor heat exchanger is not used as a condenser, but the energy accumulator is used as the outdoor heat exchanger. Because the temperature of the energy storage material in the energy accumulator after storing the cold energy is lower and is far lower than the outdoor environment temperature, the compressor does not need to provide overhigh pressure, the system can operate under the condition of low compression ratio, and the energy consumption of the system is greatly reduced. Meanwhile, the heat conduction between the low-temperature energy storage material and the refrigerant is utilized to replace the air cooling heat exchange of the outdoor heat exchanger, so that the heat exchange efficiency is improved.

As shown in fig. 7, when the air conditioning system is in the parallel cooling release mode,

four-way valve 104 is powered down. The outdoor throttling element 106, bypass valve 211, first control valve 208, third control valve 212, and fourth control valve 209 are open, and the charging throttling element 206, second control valve 207, and fifth control valve 210 are closed. The refrigerant discharged from the compressor 101 is divided into two paths, the first path enters the accumulator 201 through the first pipe 202, the second pipe 204 and the third pipe 205 for condensation, flows into the liquid side header pipe 3 through the fourth pipe 213, the other path is condensed in the outdoor heat exchanger 105, joins with the first path through the liquid side header pipe 3, and flows into the indoor unit for evaporation. After the evaporation, the refrigerant passes through the gas-side header pipe 4 and the gas-liquid separator 102 and returns to the suction side of the compressor 101. In this mode, both the outdoor heat exchanger 105 and the accumulator 201 function as condensers, and the indoor unit functions as an evaporator. At this time, the gaseous refrigerant enters from the second end 201b of the accumulator 201, and the condensed liquid refrigerant flows out from the first end 201a through the liquid separator 214.

As shown in fig. 8, when the air conditioning system is in the normal heating mode,

four-way valve 104 is energized. The bypass valve 211 is opened, the outdoor throttling element 106 is opened, and the first control valve 208, the second control valve 207, the fourth control valve 209, the fifth control valve 210, the third control valve 212, and the charging throttling element 206 are closed. The refrigerant discharged from the compressor 101 flows into the indoor unit through the gas-side header 4, is condensed and then enters the outdoor heat exchanger 105 through the liquid-side header 3 to be evaporated, and returns to the suction side of the compressor 101 through the gas-liquid separator 102. The accumulator 201 is not used at this time, and only the conventional heating cycle function is realized.

As shown in fig. 9, when the air conditioning system is in the full heat storage mode,

four-way valve 104 is energized. The outdoor throttling element 106, bypass valve 211, first control valve 208, third control valve 212, and fourth control valve 209 are open, and the charging throttling element 206, second control valve 207, and fifth control valve 210 are closed. The refrigerant discharged from the compressor 101 enters the accumulator 201 through the first pipe 202, the second pipe 204, and the third pipe 205, condenses, flows out of the fourth pipe 213, enters the liquid-side header pipe 3, flows into the outdoor heat exchanger 105, evaporates, and returns to the gas-liquid separator 102 and the suction side of the compressor 101. In this mode, the accumulator 201 acts as a condenser and the outdoor heat exchanger 105 acts as an evaporator. At this time, the gaseous refrigerant enters from the second end 201b of the accumulator 201, and the condensed liquid refrigerant flows out from the first end 201a of the accumulator 201.

As shown in fig. 10, when the air conditioning system is in a mode of heating while storing heat,

four-way valve 104 is energized. The bypass valve 211, first control valve 208, third control valve 212, and fourth control valve 209 are open, the fifth control valve 210 and the charging restriction element 206 are closed, and the outdoor restriction element 106 is open. One path of refrigerant discharged by the compressor 101 enters the accumulator 201 through the first pipe 202 and the third pipe 205 for condensation, enters the liquid side header pipe 3 from the fourth pipe 213, enters the indoor unit from the gas side header pipe 4 for condensation, enters the liquid side header pipe 3 to join with the first path of refrigerant, enters the outdoor heat exchanger 105 for evaporation, and returns to the suction side of the compressor 101 through the gas-liquid separator 102. The energy accumulator 201 and the indoor heat exchanger are used as a condenser at the same time, the energy accumulator 201 stores heat, and the indoor heat exchanger provides heat for the indoor. At this time, the refrigerant gas enters from the second end 201b of the accumulator 201, and the refrigerant liquid after condensation flows out from the first end 201a of the accumulator 201.

As shown in fig. 11, when the air conditioning system is in the mixed heat release mode,

four-way valve 104 is energized. The fifth control valve 210, bypass valve 211, second control valve 207, and charging restriction 206 are open, the first control valve 208, third control valve 212, and fourth control valve 209 are closed, and the outdoor restriction 106 is open. The refrigerant discharged from the compressor 101 enters the indoor unit from the gas side header pipe 4 for condensation, enters the liquid side header pipe 3, is divided into two paths, one path of refrigerant enters the energy accumulator 201 for evaporation after being throttled at the energy storage throttling element 206 by the second pipe 204, and is discharged by the fifth pipe 203, and the other path of refrigerant enters the outdoor heat exchanger 105 for evaporation by the liquid side header pipe 3, then joins with the first path at the inlet of the gas-liquid separator 102, and then returns to the suction side of the compressor 101. The accumulator 201 and the outdoor heat exchanger 105 simultaneously function as an evaporator to thereby enhance the evaporation capacity, and the indoor unit functions as a condenser. At this time, the two-phase refrigerant enters from the first end 201a of the accumulator 201, and the evaporated gaseous refrigerant flows out from the second end 201b.

As shown in fig. 12, when the air conditioning system is in the independent heat release mode,

four-way valve 104 is energized. The fifth control valve 210, the second control valve 207, and the bypass valve 211 are opened, the first control valve 208, the outdoor throttling element 106, and the third control valve 212 are closed, and the charging throttling element 206 is opened. The refrigerant discharged from the compressor 101 enters the indoor unit from the gas-side header pipe 4 to be condensed, enters the liquid-side header pipe 3, is throttled at the energy storage throttling element 206 by the second pipe 204, enters the energy storage 201 to be evaporated, is discharged to the gas-liquid separator 102 by the fifth pipe 203, and returns to the suction side of the compressor 101. The accumulator 201 serves as an evaporator and the indoor unit serves as a condenser. At this time, the two-phase refrigerant enters from the first end 201a of the accumulator 201, and the evaporated gaseous refrigerant flows out from the second end 201b.

As shown in fig. 13, when the air conditioning system is in the defrosting mode,

four-way valve 104 is powered down. The fifth control valve 210 and the outdoor throttling element 106 are open, the bypass valve 211, the first control valve 208 and the third control valve 212 are closed, and the charging throttling element 206 is open. The refrigerant discharged from the compressor 101 is condensed by the outdoor heat exchanger 105, enters the liquid-side header pipe 3, is throttled by the first pipe 204 at the energy storage throttling element 206, enters the energy storage 201 to be evaporated, and then returns to the gas-liquid separator 102 and the suction side of the compressor 101 through the fifth pipe 203. The mode accumulator 201 acts as an evaporator and the outdoor heat exchanger 105 acts as a condenser. At this time, the two-phase refrigerant enters from the first end 201a of the accumulator 201 through the liquid separating device 214, and the evaporated gaseous refrigerant flows out from the second end 201b of the accumulator 201.

In summary, the air conditioning system of the embodiment can utilize the energy accumulator to realize energy storage during both cooling and heating, so that the energy accumulator stores energy when the electricity price is low; when the electricity price is in a peak, the energy accumulator is used for cooling or heating, so that energy can be provided for the system, the running frequency of the compressor is reduced, the power consumption is reduced, and the running cost is reduced. When the energy accumulator is used for defrosting, the evaporator can bear the evaporation load of the system, and compared with a reverse circulation defrosting indoor heat exchanger used as an evaporator and an outdoor heat exchanger used as a condenser in a non-energy-storage air conditioner, the evaporator does not need to absorb heat from the indoor space, and is beneficial to keeping indoor comfort. On the whole, the multifunctional energy storage air conditioning system can effectively achieve the purpose of reducing the operation cost aiming at various application scenes.

Referring to FIG. 17, in some embodiments, an air conditioning system includes a first tube 202 and a second tube 204, with first tube 202 connected to the fourth port of four-way valve 104. The second pipe 204 connects the first port 201a and the second port 201b of the accumulator 201 and is connected with the first pipe 202. Compared with the embodiment shown in fig. 1, the modes of conventional refrigeration, complete cold accumulation, cold accumulation and simultaneous refrigeration, supercooling cold release, conventional heating, complete heat accumulation and simultaneous heating, mixed heat release, independent heat release, defrosting and the like can be realized.

Referring to fig. 18-23, in some embodiments, the air conditioning system further includes a reservoir 220. The liquid storage tank 220 has a first port and a second port, the first port is connected with the liquid side manifold 3, the second port is connected with the suction port of the compressor 101, and the liquid storage tank 220 has a closed state, a refrigerant storage state and a refrigerant release state. The liquid storage tank 220 is used for storing and releasing the refrigerant, and controlling the refrigerant quantity in different operation modes, so that the circulating refrigerant quantity of the system is the same as the refrigerant demand quantity in different operation modes, and the optimal heat exchange effect is exerted.

In some embodiments, the air conditioning system further includes an air balance valve 224 disposed between the first port and the outdoor heat exchanger 105 and a drain valve 223 disposed between the second port and the suction port of the compressor 101, and in a closed state, both the air balance valve 224 and the drain valve 223 are closed; in the state of storing the refrigerant, the air balance valve 224 and the liquid discharge valve 223 are both opened; in the refrigerant release state, the air balance valve 224 is closed, and the drain valve 223 is opened.

Specifically, as shown in FIG. 18, in this embodiment, the reservoir 220 has three ports including a first inlet port 220a, a second inlet port 220b, and an outlet port 220c. The first inlet 220a is connected to the liquid-side manifold 3 via a liquid inlet valve 221, the second inlet 220b is connected to the first pipe 202 via a pressure increasing valve 222, and to the fifth pipe 203 via a capillary 225 and a gas balance valve 224, and the outlet 220c is connected to the fifth pipe 203 via a capillary 225 and a liquid outlet valve 223.

As shown in FIGS. 19 and 20, reservoir 220 has three states: the refrigeration system does not work, stores the refrigerant and releases the refrigerant, and the three states can be used under the conditions of conventional refrigeration, complete cold accumulation and the like of different system modes. When not in operation, the liquid inlet valve 221, the pressurization valve 222, the liquid outlet valve 223 and the air balance valve 224 are all closed. When the current operation mode needs to start the storage refrigerant, the liquid inlet valve 221 and the gas balance valve 224 are opened, and the pressurizing valve 222 and the liquid outlet valve 223 are closed. The air balance valve 224 is opened to keep the pressure in the tank body of the liquid storage tank 220 at a low pressure state, the liquid inlet valve 221 is opened to keep the refrigerant inlet pipe of the liquid storage tank 220 at a medium pressure section, and the refrigerant enters the refrigerant tank 220 under the action of pressure difference. When the current operation mode needs to start the refrigerant tank to release the refrigerant, the liquid inlet valve 221 and the gas balance valve 224 are closed, and the pressurizing valve 222 and the liquid outlet valve 223 are opened. The drain valve 223 is opened to make the outlet end of the liquid storage tank 220 in a low pressure state, the pressure valve 222 is opened to make the pressure of the tank body of the liquid storage tank 220 in a high pressure state, and the refrigerant in the tank body is discharged out of the tank body under the action of gravity and pressure difference and enters the pipeline circulation.

As shown in FIG. 21, the present embodiment provides an alternative reservoir form having only two ports, including an inlet port 220a and an outlet port 220c. The inlet 220a is connected to the liquid-side manifold 3 via a gas balance valve 224, and the outlet 220c is connected to the fifth pipe 203 via a drain valve 223 and a capillary tube 225.

As shown in FIGS. 22 and 23, the reservoir 220 has three states: the refrigeration system does not work, stores the refrigerant and releases the refrigerant, and the three states can be used under the conditions of conventional refrigeration, complete cold accumulation and the like of different system modes. When not operating, the drain valve 223 and the air balance valve 224 are both closed. When the current operation mode needs to be started to store the refrigerant, the drain valve 223 and the air balance valve 224 are both opened, and the refrigerant enters the refrigerant tank 220 under the action of pressure difference. When the current operation mode needs to be started to release the refrigerant, the air balance valve 224 is closed, the liquid discharge valve 223 is opened, and the refrigerant in the tank body is discharged out of the tank body under the action of gravity and pressure difference and enters the pipeline circulation.

The embodiment of the application provides a control method of an air conditioning system based on the above embodiments, which includes the following steps:

determining the working mode of the air conditioning system;

and controlling the four-way valve and the control valve assembly to act according to a preset control strategy and based on the working mode so as to adjust the states of the outdoor heat exchanger 105, the indoor heat exchanger and the accumulator 201.

In some embodiments, controlling the four-way valve and control valve assembly actions to adjust the state of the outdoor heat exchanger 105, indoor heat exchanger, and accumulator 201 according to a preset control strategy and based on the operating mode includes:

in the period of time when the power supply system is at low electricity price, the four-way valve and the control valve component are controlled to act based on the working mode so that the energy accumulator 201 can accumulate energy;

during periods when the power supply system is at high electricity prices, the four-way valve and the control valve assembly are controlled to act based on the working mode so that the accumulator 201 releases energy.

In some embodiments, the modes of operation of the air conditioning system include conventional refrigeration, full cold storage, cold storage with simultaneous refrigeration, sub-cool cold release, condensation cold release, parallel cold release, conventional heating, full heat storage, heat storage with simultaneous heating, mixed heat release, independent heat release, and defrosting.

The embodiment of the application also provides a control method based on the air conditioning system, which comprises the following steps:

determining the working mode of the air conditioning system;

the actions of the four-way valve 104, the first control valve 208, the second control valve 207, the third control valve 212, the fourth control valve 209, the fifth control valve 210, the bypass valve 211, the charge throttling element 206 and the outdoor throttling element 106 are controlled according to a preset control strategy and based on the operating mode to change the states of the outdoor heat exchanger 105, the indoor heat exchanger and the accumulator 201.

In some embodiments, when the operation mode is the normal cooling mode, the four-way valve 104 is controlled to be powered off, the bypass valve 211 and the outdoor throttling element 106 are opened, and the first control valve 208, the second control valve 207, the third control valve 212, the fourth control valve 209, the fifth control valve 210 and the energy storage throttling element 206 are closed;

in which the outdoor heat exchanger 105 serves as a condenser, the indoor heat exchanger serves as an evaporator, and the accumulator 201 does not operate.

In some embodiments, when the operation mode is the full cold storage mode, the four-way valve 104 is controlled to be powered off, the fifth control valve 210, the second control valve 207, the outdoor throttling element 106 and the energy storage throttling element 206 are opened, and the bypass valve 211, the first control valve 208, the fourth control valve 209 and the third control valve 212 are closed;

here, the outdoor heat exchanger 105 functions as a condenser, the accumulator 201 functions as an evaporator, and the refrigerant enters from the first port 201a of the accumulator 201 and flows out from the second port 201b of the accumulator 201.

In some embodiments, when the operation mode is the cooling-while-cold storage mode, the four-way valve 104 is controlled to be powered off, the bypass valve 211, the second control valve 207, the fifth control valve 210, the outdoor throttling element 106 and the energy storage throttling element 206 are controlled to be opened, and the first control valve 208 and the third control valve 212 are controlled to be closed;

here, the outdoor heat exchanger 105 serves as a condenser, the accumulator 201 and the indoor heat exchanger serve as evaporators at the same time, and the refrigerant enters from the first port 201a of the accumulator 201 and flows out from the second port 201b of the accumulator 201.

In some embodiments, when the operation mode is the sub-cooling and cooling mode, the four-way valve 104 is controlled to be powered down, the outdoor throttling element 106, the second control valve 207, the third control valve 212 and the fourth control valve 209 are controlled to be opened, and the bypass valve 211, the fifth control valve 210, the first control valve 208 and the energy storage throttling element 206 are controlled to be closed;

the outdoor heat exchanger 105 serves as a condenser, the accumulator 201 serves as a subcooler, and the refrigerant enters from the second port 201b of the accumulator 201 and flows out from the first port 201a of the accumulator 201.

In some embodiments, when the operation mode is the condensing and cooling mode, the four-way valve 104 is controlled to be powered off, the first control valve 208, the third control valve 212 and the fourth control valve 209 are controlled to be opened, and the bypass valve 211, the fifth control valve 210, the outdoor throttling element 106 and the energy storage throttling element 206 are controlled to be closed;

here, the outdoor heat exchanger 105 does not operate, the accumulator 201 functions as a condenser, and the refrigerant enters from the second port 201b of the accumulator 201 and flows out from the first port 201a of the accumulator 201.

In some embodiments, when the operating mode is the parallel cooling mode, the four-way valve 104 is controlled to be powered down, the outdoor throttling element 106, the bypass valve 211, the third control valve 212, the fourth control valve 209 and the first control valve 208 are controlled to be opened, and the energy storage throttling element 206, the second control valve 207 and the fifth control valve 210 are controlled to be closed;

the outdoor heat exchanger 105 serves as a condenser, the accumulator 201 serves as a condenser, and the refrigerant enters from the second port 201b of the accumulator 201 and flows out from the first port 201a of the accumulator 201.

In some embodiments, when the operation mode is the normal heating mode, the four-way valve 104 is controlled to be energized, the bypass valve 211 and the outdoor throttling element 106 are opened, and the first control valve 208, the second control valve 207, the third control valve 212, the fourth control valve 209, the fifth control valve 210 and the energy storage throttling element 206 are closed;

in which the outdoor heat exchanger 105 functions as an evaporator and the accumulator 201 does not operate.

In some embodiments, when the operation mode is the full heat storage mode, the four-way valve 104 is controlled to be energized, the bypass valve 211, the first control valve 208, the third control valve 212, the fourth control valve 209 and the outdoor throttling element 106 are opened, and the charging throttling element 206, the second control valve 207 and the fifth control valve 210 are closed;

the accumulator 201 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the refrigerant enters from the second port 201b of the accumulator 201 and flows out from the first port 201a of the accumulator 201.

In some embodiments, when the operation mode is the heating while heat storage mode, the four-way valve 104 is controlled to be powered on, the bypass valve 211, the first control valve 208, the third control valve 212, the fourth control valve 209 and the outdoor throttling element 106 are opened, and the second control valve 207, the fifth control valve 210 and the energy storage throttling element 206 are closed;

In some embodiments, when the operating mode is the mixed heat release mode, the four-way valve 104 is controlled to be energized, the fifth control valve 210, the charge throttling element 206, the outdoor throttling element 106 and the bypass valve 211 are opened, and the first control valve 208, the third control valve 212 and the fourth control valve 209 are closed;

the accumulator 201 and the outdoor heat exchanger 105 serve as evaporators, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port 201a of the accumulator 201 and flows out from the second port 201b of the accumulator 201.

In some embodiments, when the operation mode is the independent heat release mode, the four-way valve 104 is controlled to be powered on, the fifth control valve 210, the bypass valve 211, the second control valve 207 and the energy storage throttling element 206 are opened, and the first control valve 208, the outdoor throttling element 106, the third control valve 212 and the fourth control valve 209 are closed;

here, the outdoor heat exchanger 105 does not operate, the accumulator 201 serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port 201a of the accumulator 201 and flows out from the second port 201b of the accumulator 201.

In some embodiments, when the operating mode is the defrost mode, the four-way valve 104 is controlled to be de-energized, the second control valve 207, the fifth control valve 210, the outdoor throttling element 106, and the charging throttling element 206 are opened, and the bypass valve 211, the first control valve 208, and the third control valve 212 are closed;

the indoor heat exchanger does not work, the accumulator 201 serves as an evaporator, the indoor heat exchanger serves as a condenser, and the refrigerant enters from the first port 201a of the accumulator 201 and flows out from the second port 201b of the accumulator 201.

An embodiment of the present application further provides a control device of an air conditioning system, including:

a memory configured to store instructions;

and a processor coupled to the memory, the processor configured to implement the above-described control method based on instructions stored by the memory.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions, when executed by a processor, implement the control method.

The present application provides an air conditioning system. The air conditioning system can provide energy storage and energy release services aiming at various different power load transfer scenes.

As shown in fig. 1, the air conditioning system according to the embodiment of the present invention includes an outdoor unit 1, an energy storage device 2, a liquid-side header pipe 3, and a gas-side header pipe 4. The liquid side main pipe 3 and the gas side main pipe 4 are connected with the indoor heat exchanger

The outdoor unit 1 includes a compressor 101, a gas-liquid separator 102, a subcooler 103, a four-way valve 104, an outdoor heat exchanger 105, an outdoor throttling element 106, and a subcooling throttling element 107.

Four-way valve 104 has a first port, a second port, a third port, and a fourth port. When the four-way valve 104 is powered off, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port. When the four-way valve 104 is energized, the first port is communicated with the fourth port, and the second port is communicated with the third port.

A first port of the four-way valve 104 is connected to an exhaust port of the compressor 101, a second port of the four-way valve 104 is connected to the outdoor heat exchanger 105, a third port of the four-way valve 104 is connected to the gas-liquid separator 102, and a fourth port of the four-way valve 104 is connected to the gas-side header pipe 4.

A first end of the outdoor heat exchanger 105 is connected to a second valve port of the four-way valve 104, and a second end of the outdoor heat exchanger 105 is connected to the outdoor throttling element 106 and to the subcooler 103 through the outdoor throttling element 106.

The energy storage apparatus 2 includes an accumulator 201, a first pipe 202, a second pipe 204, a third pipe 205, a fourth pipe 213, a fifth pipe 203, a bypass pipe, and a control valve assembly. The control valve assembly includes a first control valve 208, a second control valve 207, a third control valve 212, a fourth control valve 209, a fifth control valve 210, a bypass valve 211, and an energy storing throttling element 206. The first pipe 202 and the fifth pipe 203 are used for connecting the energy storage device 2 and the outdoor unit 1.

The first end 201a of the accumulator 201 is connected to the discharge line of the compressor 101 via the second pipe 204 and the first pipe 202, to the liquid-side header pipe 3 via the second pipe 204 and the bypass pipe, and to the liquid-side header pipe 3 via the fourth pipe 213.

The second end 201b of the accumulator 201 is connected to the second pipe 204 via the third pipe 205 and to the gas-liquid separator 102 via the fifth pipe 203.

At a first end of the energy accumulator 201, a liquid separating device 214 and an energy accumulating throttle element 206 are arranged, a first control valve 208 is arranged at the first line 202, a second control valve 207 is arranged at the second line 204, a fourth control valve 209 is arranged at the fourth line 213, a third control valve 212 is arranged at the third line 205, a fifth control valve 210 is arranged at the fifth line 203, and a bypass valve 211 is arranged between a second end of the second line 204 and the fluid-side manifold 3.

The accumulator 201 is filled with an energy storage material and is provided with a refrigerant pipeline. The refrigerant flows in the pipeline and fully exchanges heat with the energy storage material to realize cold accumulation and cold release.

Through the switching of the valves, twelve modes such as conventional refrigeration, complete cold accumulation, simultaneous cold accumulation of refrigeration, supercooling cold release, condensation cold release, parallel cold release, conventional heating, complete heat accumulation, simultaneous heat accumulation of heating, mixed heat release, independent heat release, defrosting and the like can be realized. The twelve modes of control methods can refer to the descriptions of fig. 2 to fig. 13, and are not described herein again.

As shown in fig. 14, in the first alternative embodiment, unlike the embodiment shown in fig. 1, the fourth control valve 209 is replaced with an electromagnetic valve to more strictly control the opening and closing of the fourth pipe 213.

In this embodiment, to switch the twelve modes, the operation of each valve is as shown in the following table.

In a second alternative embodiment, as shown in fig. 15, unlike the embodiment shown in fig. 1, the second control valve 207 is replaced with an electromagnetic valve to ensure tighter control of the opening and closing of the flow path, and the control method is as follows:

as shown in fig. 16, in the third alternative embodiment, different from the embodiment shown in fig. 1, a throttling element 215 is connected in parallel to both ends of a third control valve 212, and when the heat storage simultaneous heating mode or the parallel cooling mode is performed, the flow rate of the refrigerant flowing to the accumulator and the indoor unit can be distributed by adjusting the opening degree of the throttling element 215. The control method at this time is as follows:

in a fourth alternative embodiment, shown in figure 17, unlike the embodiment shown in figure 1, the first tubes 202 are connected to the gas-side manifold 4. Most functions of the embodiment shown in fig. 1 can be realized, and only two of condensation and parallel cold release can not be carried out during refrigeration. The valve opening and closing and the refrigerant flow path are exactly the same as those in the embodiment shown in fig. 1. During heating, when heat is completely stored and simultaneously heated, the high-temperature and high-pressure gaseous refrigerant still enters the accumulator through the first gas pipe 202, and the opening and closing of the valve and the refrigerant flow path are consistent with those of the embodiment shown in fig. 1. When defrosted, the same is true as the embodiment shown in fig. 1.

As shown in fig. 18, in the fifth alternative embodiment, a liquid storage tank 220 is additionally arranged on the basis of the energy storage system, and the refrigerant quantity in different operation modes is controlled by storing and releasing the refrigerant in the liquid storage tank 220, so that the circulating refrigerant quantity of the system is consistent with the refrigerant demand in different operation modes, and the optimal heat exchange effect is exerted.

As shown in FIGS. 19 and 20, the reservoir 220 has three ports. The first inlet 220a is connected to the liquid side manifold 3 via an inlet valve 221, the second inlet 220b is connected to the first pipe 202 via a pressurizing valve 222, the fifth pipe 203 via a capillary 225 and a gas balance valve 224, and the outlet 220c is connected to the fifth pipe 203 via a capillary 225 and a drain valve 223.

As shown in fig. 21, in the sixth alternative embodiment, a liquid storage tank 220 is additionally arranged on the basis of the energy storage system, and the refrigerant quantity in different operation modes is controlled by storing and releasing the refrigerant in the liquid storage tank 220, so that the circulating refrigerant quantity of the system is consistent with the refrigerant demand in different operation modes, and the optimal heat exchange effect is exerted.

Unlike the construction of the reservoir 220 of the embodiment illustrated in FIG. 18, the reservoir 220 has two ports.

In conclusion, the air conditioning system provided by the embodiment of the application stores energy in the off-peak electricity price period and releases energy in the peak electricity price period, so that the power consumption of the air conditioner is reduced. The peak clipping and valley filling of the electric power are realized, and the operation cost of the air conditioner is reduced. In addition, through the switching of the four-way valve and the control valve group, the air conditioning system can realize twelve functions of cold accumulation, cold release and the like, the application range of the energy storage system is widened, and the availability of the energy storage system is improved. In addition, the energy accumulator of the embodiment of the application can feed the refrigerant in two directions, can ensure uniform liquid separation when the liquid refrigerant enters the energy accumulator, and can also reduce pressure loss when the gaseous refrigerant enters the energy accumulator. In the process of two-way refrigerant feeding, namely cold accumulation and cold release, the flowing directions of the refrigerants in the accumulator are opposite. Specifically, when cold accumulation is performed, the temperature of the refrigerant gradually rises along the flow, so that the temperature of the energy storage material in the energy accumulator is distributed from low to high when the cold accumulation is finished. When the refrigerant is released, the high-temperature refrigerant flows into the energy accumulator from the other end, and the flow direction is opposite. At the moment, along with the heat exchange with the energy storage material with the temperature distribution from high to low, the heat exchange (counter-flow heat exchange) can be more sufficient, the temperature of the obtained refrigerant is lower, and the effect is better.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the application or equivalent replacements of some of the technical features may still be made; all of which are intended to be encompassed within the scope of the claims appended hereto without departing from the spirit and scope of the present disclosure.

Claims

1. An air conditioning system, comprising:

a compressor (101);

an outdoor heat exchanger (105);

a liquid side header pipe (3);

a gas-side header pipe (4);

the indoor heat exchanger is connected with the liquid side header pipe (3) and the gas side header pipe (4);

a four-way valve (104), wherein the four-way valve (104) is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected with an exhaust port of the compressor (101), the second valve port is connected with the outdoor heat exchanger (105), the third valve port is connected with an air suction port of the compressor (101), and the fourth valve port is connected with the air side header pipe (4);

an accumulator (201) having a first port (201 a) and a second port (201 b), the first port (201 a) being openably and closably connected to the outdoor heat exchanger (105) and the liquid-side header pipe (3), respectively, and the second port (201 b) being openably and closably connected to a discharge port of the compressor (101), a suction port of the compressor (101), and the outdoor heat exchanger (105), respectively; and

the four-way valve (104) and the control valve assembly act to adjust working states of the energy accumulator (201), the outdoor heat exchanger (105) and the indoor heat exchanger and enable the air conditioning system to be switched among different working modes, the energy accumulator (201) has a first working state and a second working state, and in the first working state, refrigerant enters the energy accumulator (201) from the first port (201 a) and flows out from the second port (201 b); in a second working state, refrigerant enters the accumulator (201) from the second port (201 b) and flows out through the first port (201 a).

2. Air conditioning system according to claim 1, wherein a liquid separating device (214) is arranged at the first port (201 a), and the refrigerant enters the accumulator (201) through the liquid separating device (214).

3. Air conditioning system according to claim 1, characterized in that it comprises a first pipe (202) and a second pipe (204), said first pipe (202) being connected to the discharge of said compressor (101), said second pipe (204) being connected at a first end to a first port (201 a) of said accumulator (201), said second pipe (204) being connected at a second end to said outdoor heat exchanger (105), said second pipe (204) being connected to said first pipe (202) at a first connection point, said first pipe (202) being arranged to be openable and closable, said second pipe (204) being arranged to be openable and closable.

4. The air conditioning system of claim 3, wherein the control valve assembly comprises a first control valve (208) disposed on the first pipe (202), the first control valve (208) configured to control the opening and closing of the first pipe (202).

5. Air conditioning system according to claim 3, characterized in that the control valve assembly comprises an energy storing throttling element (206) arranged between the first connection point of the second pipe (204) and the first end thereof.

6. Air conditioning system according to claim 3, wherein the control valve assembly comprises a second control valve (207) arranged between the first connection point of the second pipe (204) and its second end, the second control valve (207) being configured to control the switching of the line.

7. Air conditioning system according to claim 6, wherein the second port (201 b) is connected to the second pipe (204) by a third pipe (205), the second pipe (204) and the third pipe (205) being connected at a second connection point, the second control valve (207) being arranged between the second connection point and the second end of the second pipe (204).

8. The air conditioning system of claim 7, wherein the control valve assembly further comprises a third control valve (212) disposed on the third pipe (205), the third control valve (212) configured to control the opening and closing of the third pipe (205).

9. The air conditioning system of claim 8, wherein the control valve assembly further comprises a throttling element (215) connected in parallel across the third control valve (212), an opening degree of the throttling element (215) being adjustably set.

10. Air conditioning system according to claim 1, characterized in that it further comprises a fourth pipe (213), said first port (201 a) being connected to said liquid side manifold (3) by means of the fourth pipe (213), said fourth pipe (213) being openably and closably arranged.

11. Air conditioning system according to claim 10, wherein the control valve assembly further comprises a fourth control valve (209) arranged on the fourth pipe (213), the fourth control valve (209) being adapted to control the switching of the fourth pipe (213).

12. Air conditioning system according to claim 10, characterized in that it comprises a second pipe (204) and a bypass pipe, the first end of the second pipe (204) being connected to the first port (201 a), the second end of the second pipe (204) being connected to the outdoor heat exchanger (105), the fourth pipe (213) being connected to the second end of the second pipe (204) through the bypass pipe, the control valve assembly further comprising a bypass valve (211) arranged on the bypass pipe, the bypass valve (211) being adapted to control the opening and closing of the bypass pipe.

13. The air conditioning system of claim 1, further comprising a fifth pipe, wherein the control valve assembly further comprises a fifth control valve (210) disposed on the fifth pipe, wherein the second port (201 b) is connected to a suction port of the compressor (101) through the fifth pipe, and wherein the fifth control valve (210) is configured to control on/off of the fifth pipe.

14. Air conditioning system according to claim 1, characterized in that it comprises a first pipe (202), a second pipe (204), a third pipe (205), a fourth pipe (213), a fifth pipe and a bypass pipe, the control valve assembly comprising a first control valve (208), a second control valve (207), a third control valve (212), a fourth control valve (209), a fifth control valve (210), a bypass valve (211), an accumulation throttling element (206) and an outdoor throttling element (106), the first pipe (202) being connected to the discharge of the compressor (101), the first control valve (208) being arranged on the first pipe (202) and being configured to control the switching of the first pipe (202), a first end of the second pipe (204) being connected to the first port (201 a), a second end of the second pipe (204) being connected to the outdoor heat exchanger (105), the second pipe (204) being connected to the first pipe (202), the second pipe (206) being arranged at a first connection point with the first pipe (202), the second throttling element (206) being arranged between the second connection point of the third pipe (204) and the third connection point of the accumulation throttling element (204), and the bypass pipe (207) being configured to control the switching of the third connection point (204), the first port (201 a) is connected to the liquid side header pipe (3) through a fourth pipe (213), the fourth control valve (209) is disposed on the fourth pipe (213) and configured to control opening and closing of the fourth pipe (213), the fourth pipe (213) is connected to the second end of the second pipe (204) through the bypass pipe, the bypass valve (211) is disposed on the bypass pipe and configured to control opening and closing of the bypass pipe, the second port (201 b) is connected to the suction port of the compressor (101) through the fifth pipe, the fifth control valve (210) is disposed on the fifth pipe and configured to control opening and closing of the fifth pipe, the first end of the outdoor heat exchanger (105) is connected to the second port of the four-way valve (104), and the second end of the outdoor heat exchanger (105) is connected to the outdoor throttle element (106).

15. The air conditioning system of claim 1, comprising a first pipe (202) and a second pipe (204), the first pipe (202) being connected to a fourth port of the four-way valve (104), the first port (201 a) being connected to the first pipe (202) through the second pipe (204).

16. Air conditioning system according to any of claims 1 to 15, further comprising a liquid reservoir (220), wherein the liquid reservoir (220) has a first connection and a second connection, the first connection being connected to the liquid side manifold (3), the second connection being connected to the suction port of the compressor (101), and wherein the liquid reservoir (220) has a closed state, a refrigerant storage state and a refrigerant release state.

17. Air conditioning system according to claim 16, further comprising an air balance valve (224) arranged between the first connection and the outdoor heat exchanger (105) and a drain valve (223) arranged between the second connection and a suction of the compressor (101), the air balance valve (224) and the drain valve (223) both being closed in a closed state; in the state of storing the refrigerant, the gas balance valve (224) and the liquid discharge valve (223) are both opened; in the refrigerant release state, the air balance valve (224) is closed, and the drain valve (223) is opened.