CN218544698U

CN218544698U - Air conditioning system

Info

Publication number: CN218544698U
Application number: CN202223030528.2U
Authority: CN
Inventors: 张仕强; 袁帆; 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: 2023-02-28
Anticipated expiration: 2032-11-15

Abstract

The utility model relates to an air conditioning system, including compressor, outdoor heat exchanger, indoor heat exchanger, storage container and valve member, storage container and compressor, outdoor heat exchanger and indoor heat exchanger fluid intercommunication, valve member and compressor, outdoor heat exchanger, indoor heat exchanger and storage container are connected, the valve member is configured to the flow direction of control refrigerant and/or connecting line's break-make, with the state of adjusting storage container, and realize the switching between the different work pattern, storage container's state is including closed condition, storage refrigerant state and release refrigerant state. The utility model discloses a to the operation of valve member, can adjust storage container's state to realize the switching of air conditioning system between a plurality of different working modes, satisfy user's diversified demand, promote user's use and experience.

Description

Air conditioning system

Technical Field

The utility model relates to an air conditioning technology field especially relates to an air conditioning system.

Background

The heating defrosting of the multi-split air conditioner is a ubiquitous problem in the air conditioning industry, the frequent defrosting of the air conditioner can cause the poor heating effect of the whole body, the indoor temperature is reduced in the defrosting process, and the use comfort of a user is poor.

In order to solve the problem of air conditioning heating defrosting, a plurality of coping measures are available at present, wherein a defrosting system combining a heat storage module is gradually raised in the air conditioning industry, namely heat storage is carried out during heating operation, and heat release is carried out during defrosting, so that fluctuation of indoor temperature is reduced. However, the operation mode of the heat storage module is single, the diversified requirements of users cannot be met, the pipeline design is complex, and bad experience is caused to the users.

It is noted that the information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention, and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an air conditioning system solves the problem that air conditioning system among the correlation technique can't satisfy the diversified demand of user.

According to an aspect of the present invention, there is provided an air conditioning system, comprising:

a compressor;

an outdoor heat exchanger;

an indoor heat exchanger;

a storage vessel in fluid communication with the compressor, the outdoor heat exchanger, and the indoor heat exchanger; and

the valve assembly is connected with the compressor, the outdoor heat exchanger, the indoor heat exchanger and the storage container, and is configured to control the flow direction of the refrigerant and/or the on-off of a connecting pipeline so as to adjust the state of the storage container and realize the switching of the air conditioning system among different working modes, and the state of the storage container comprises a closing state, a refrigerant storage state and a refrigerant releasing state.

In some embodiments, the air conditioning system further comprises an accumulator, a first end of the accumulator is respectively communicated with the air outlets of the outdoor heat exchanger and the compressor, a second end of the accumulator is respectively communicated with the air inlets of the indoor heat exchanger and the compressor, and a valve assembly is connected with the accumulator to adjust the state of the accumulator, wherein the state of the accumulator comprises a non-working state, a cold storage state, a cold release state, a heat storage state and a heat release state.

In some embodiments, the valve assembly includes a first control valve and a first throttling element connected in parallel between the first end of the accumulator and the outdoor heat exchanger.

In some embodiments, the valve assembly includes a second control valve disposed on a connection line between the indoor heat exchanger and a first connection point located on a line connecting the outdoor heat exchanger with the first control valve and the first throttling member.

In some embodiments, the valve assembly includes a third control valve disposed on the connecting line between the first end of the accumulator and the discharge port of the compressor.

In some embodiments, the valve assembly includes a fourth control valve disposed on the connecting line between the second end of the accumulator and the inlet of the compressor.

In some embodiments, the valve assembly includes a second flow restriction, a first end of the second flow restriction communicating with the second end of the accumulator, and a second end of the second flow restriction communicating with the indoor heat exchanger and the outdoor heat exchanger, respectively.

In some embodiments, the valve assembly includes a third orifice member disposed on the connection line between the outdoor heat exchanger and the indoor heat exchanger.

In some embodiments, the valve assembly comprises a four-way valve comprising a first port in communication with the discharge port of the compressor, a second port in communication with the outdoor heat exchanger, a third port in communication with the intake port of the compressor, and a fourth port in communication with the indoor heat exchanger.

In some embodiments, the air conditioning system further includes a subcooler disposed between the outdoor heat exchanger and the indoor heat exchanger, and the subcooler is in communication with an air intake of the compressor.

In some embodiments, the valve assembly includes a fifth control valve connected between the first connection line and the third communication port of the storage tank, the first connection line being a line through which the outdoor heat exchanger communicates with the indoor heat exchanger and the accumulator, respectively, a sixth control valve connected between the connection line between the discharge port of the compressor and the first end of the accumulator and the second communication port of the storage tank, a seventh control valve connected between the connection line between the second end of the accumulator and the intake port of the compressor and the first communication port of the storage tank, and an eighth control valve connected between the connection line between the second end of the accumulator and the intake port of the compressor and the second communication port of the storage tank.

In some embodiments, the valve assembly further comprises a fourth orifice connected between the seventh control valve and the first communication port of the storage container, and a fifth orifice connected between the eighth control valve and the second communication port of the storage container.

In some embodiments, the valve assembly includes a tenth control valve, a seventh throttle and an eleventh control valve, the tenth control valve is connected between a first connecting line and the fourth communication port of the storage container, the first connecting line is a line through which the outdoor heat exchanger communicates with the indoor heat exchanger and the accumulator, respectively, the eleventh control valve is connected between a connecting line between the second end of the accumulator and the air inlet of the compressor and the fifth communication port of the storage container, and the seventh throttle is connected between the eleventh control valve and the fifth communication port of the storage container.

In some embodiments, the valve assembly includes a first control valve, a second control valve, a third control valve, a fourth control valve, a first throttle, a second throttle, a third throttle and a four-way valve, the first control valve and the first throttle are connected in parallel between a first end of the accumulator and a first connection point, the first connection point is communicated with the outdoor heat exchanger, the second control valve is disposed on a connection line between the first connection point and the indoor heat exchanger, the third control valve is disposed on a connection line between the first end of the accumulator and an exhaust port of the compressor, the fourth control valve is disposed on a connection line between a second end of the accumulator and an air inlet of the compressor, the first end of the second throttle is communicated with a second end of the accumulator, the second end of the second throttle is communicated with the indoor heat exchanger and the outdoor heat exchanger, the third throttle is disposed on a connection line between the outdoor heat exchanger and the first connection point, the four-way valve includes a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with an exhaust port of the compressor, the second interface is communicated with the outdoor heat exchanger, the third interface is communicated with the indoor heat exchanger, and the four-way valve includes a gas inlet of the compressor.

Based on the technical scheme, the embodiment of the utility model can change the flow direction of the refrigerant and/or adjust the on-off of the connecting pipeline through the operation of the valve component so as to adjust the state of the storage container and realize the switching of the air conditioning system among a plurality of different working modes; moreover, the storage container can be closed, can also store the refrigerant, and can also release the stored refrigerant, so that the diversified demands of the user can be met to a higher degree, and the use experience of the user is improved.

Drawings

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

fig. 1 is a schematic structural diagram of some embodiments of the air conditioning system of the present invention.

Fig. 2 is a schematic diagram illustrating refrigerant flow of some embodiments of the air conditioning system of the present invention in a conventional refrigerant storage mode.

Fig. 3 is a schematic diagram illustrating refrigerant flow in a conventional refrigerant release mode according to some embodiments of the air conditioning system of the present invention.

Fig. 4 is a schematic diagram of the refrigerant flow of some embodiments of the air conditioning system of the present invention in the complete cold storage and refrigerant storage mode.

Fig. 5 is a schematic view of the refrigerant flow of some embodiments of the air conditioning system of the present invention in the complete cold accumulation and refrigerant release mode.

Fig. 6 is a schematic view of the refrigerant flow in the refrigerant storage mode according to some embodiments of the air conditioning system of the present invention.

Fig. 7 is a schematic view of the refrigerant flow in the cooling/cold storage/refrigerant release mode according to some embodiments of the air conditioning system of the present invention.

Fig. 8 is a schematic view of refrigerant flow in the sub-cooling and cooling storage refrigerant mode according to some embodiments of the present invention.

Fig. 9 is a schematic view of refrigerant flow in the sub-cooling, cool-releasing and refrigerant-releasing mode according to some embodiments of the present invention.

Fig. 10 is a schematic view of the flow of refrigerant in the condensing, cooling and storing mode according to some embodiments of the present invention.

Fig. 11 is a schematic view of refrigerant flow in a condensing, cooling and releasing mode according to some embodiments of the present invention.

Fig. 12 is a refrigerant flow diagram illustrating a parallel refrigerant-storage mode of the air conditioning system according to some embodiments of the present invention.

Fig. 13 is a refrigerant flow diagram illustrating a parallel refrigerant-releasing mode of an air conditioning system according to some embodiments of the present invention.

Fig. 14 is a schematic diagram of refrigerant flow in a conventional refrigerant heating and storage mode according to some embodiments of the air conditioning system of the present invention.

Fig. 15 is a schematic view of refrigerant flow in a conventional heating and refrigerant releasing mode according to some embodiments of the air conditioning system of the present invention.

Fig. 16 is a schematic diagram of refrigerant flow in the complete heat storage refrigerant storage mode according to some embodiments of the present invention.

Fig. 17 is a schematic diagram of the flow of the refrigerant in the complete heat storage and refrigerant release mode according to some embodiments of the present invention.

Fig. 18 is a schematic view of the refrigerant flow in the mode of heating, storing and storing the refrigerant according to some embodiments of the air conditioning system of the present invention.

Fig. 19 is a schematic diagram of the flow of refrigerant in the heating, heat-storage, and refrigerant-releasing mode according to some embodiments of the air conditioning system of the present invention.

Fig. 20 is a schematic view of the flow of refrigerant in the mixed heat-releasing storage refrigerant mode according to some embodiments of the present invention.

Fig. 21 is a schematic view of refrigerant flow in a mixed heat-releasing refrigerant mode according to some embodiments of the present invention.

Fig. 22 is a schematic view of refrigerant flow in an independent heat-releasing refrigerant storage mode according to some embodiments of the present invention.

Fig. 23 is a schematic view of refrigerant flow in an independent heat releasing refrigerant mode according to some embodiments of the present invention.

Fig. 24 is a schematic structural view of other embodiments of the air conditioning system of the present invention.

In the figure:

1. an outdoor unit; 2. an energy storage device; 3. a liquid side main pipe; 4. a gas side main pipe;

101. a compressor; 102. an oil separator; 103. a one-way valve; 104. a four-way valve; 105. an outdoor heat exchanger; 106. a third throttling element; 107. a sixth orifice; 108. a ninth control valve; 109. a subcooler; 110. a gas-liquid separator;

201. an accumulator; 202. a first air pipe; 203. a second air pipe; 204. a first liquid pipe; 205. a second liquid pipe; 206. a first orifice member; 207. a first control valve; 208. a third control valve; 209. a second orifice member; 210. a fourth control valve; 211. a second control valve;

220. a storage container; 220a, a third communication port; 220b, a second communication port; 220c, a first communication port; 221. a fifth control valve; 222. a sixth control valve; 223. a seventh control valve; 224. an eighth control valve; 225. a fourth orifice; 226. a fifth orifice member;

220d and a fourth communication port; 220e, a fifth communication port; 227. a tenth control valve; 228. a seventh throttling element; 229. an eleventh control valve;

301. an indoor heat exchanger.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.

As shown in fig. 1, in some embodiments of the air conditioning system provided in the present invention, the air conditioning system includes a compressor 101, an outdoor heat exchanger 105, an indoor heat exchanger 301, a storage container 220 and a valve assembly, the storage container 220 is connected to the compressor 101, the outdoor heat exchanger 105 and the indoor heat exchanger 301, the valve assembly is connected to the compressor 101, the outdoor heat exchanger 105, the indoor heat exchanger 301 and the storage container 220, the valve assembly is configured to control the flow direction of the refrigerant and/or the connection pipeline to adjust the state of the storage container 220, and to realize the switching between different working modes of the air conditioning system, the state of the storage container 220 includes a closed state, a state of storing the refrigerant and a state of releasing the refrigerant.

In the above embodiment, by operating the valve assembly, the flow direction of the refrigerant can be changed and/or the on/off of the connecting pipeline can be adjusted, so as to adjust the state of the storage container 220 and realize the switching of the air conditioning system among a plurality of different working modes; moreover, the storage container 220 can be closed, can also store the refrigerant, and can also release the stored refrigerant, so that the diversified requirements of the user can be met to a higher degree, and the use experience of the user is improved.

In other embodiments of the air conditioning system provided by the present invention, the air conditioning system includes a compressor 101, an outdoor heat exchanger 105, an indoor heat exchanger 301, an accumulator 201, a storage container 220 and a valve assembly, a first end of the accumulator 201 communicates with an exhaust port of the outdoor heat exchanger 105 and an exhaust port of the compressor 101, respectively, a second end of the accumulator 201 communicates with an air inlet of the indoor heat exchanger 301 and an air inlet of the compressor 101, respectively, the storage container 220 is connected to the compressor 101, the outdoor heat exchanger 105, the indoor heat exchanger 301 and the accumulator 201, the valve assembly is connected to the compressor 101, the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201 and the storage container 220, and the valve assembly is configured to control a flow direction of a refrigerant and/or an on/off state of a connecting pipeline, so as to adjust a state of the accumulator 201 and a state of the storage container 220, and to realize switching between different working modes of the refrigerant conditioning system, a state of the accumulator 201 includes a non-working state, a cold storage state, a heat storage state and a cold release state, and a cold storage state.

In the above embodiment, by operating the valve assembly, the flow direction of the refrigerant can be changed and/or the on/off of the connecting pipeline can be adjusted, so as to adjust the states of the accumulator 201 and the storage container 220, and realize the switching of the air conditioning system between a plurality of different working modes; moreover, the energy accumulator 201 has a non-working state, a cold storage state, a cold release state, a heat storage state and a heat release state, that is, the energy accumulator 201 may or may not participate in the work; when the device participates in work, the device can store cold and release cold; can not only store heat, but also release heat; the storage container 220 can be closed, can also store the refrigerant, and can release the stored refrigerant, so that the diversified requirements of the user can be met to a higher degree, and the use experience of the user is improved.

The embodiment of the utility model provides a can solve the bad problem of heat transfer that leads to because of the refrigerant demand is inconsistent under different operational mode. The refrigerant quantity under different operation modes is controlled by storing and releasing the refrigerant by the storage container, so that the system circulation refrigerant quantity is consistent with the refrigerant demand quantity of the different operation modes, and the optimal heat exchange effect is exerted.

As shown in fig. 1, in some embodiments, the valve assembly includes a first control valve 207 and a first throttling member 206, and the first control valve 207 and the first throttling member 206 are connected in parallel between the first end of the accumulator 201 and the outdoor heat exchanger 105.

Two connection modes between the first ends of the outdoor heat exchanger 105 and the energy accumulator 201 can be realized by arranging the first control valve 207 and the first throttling element 206 which are connected in parallel, when the first ends of the outdoor heat exchanger 105 and the energy accumulator 201 are communicated through the first control valve 207, the refrigerant flowing out of the outdoor heat exchanger 105 can directly enter the energy accumulator 201 in an outflow state, and the refrigerant can be further supercooled in the energy accumulator 201; when the outdoor heat exchanger 105 is communicated with the first end of the energy accumulator 201 through the first throttling element 206, the refrigerant flowing out of the outdoor heat exchanger 105 can flow into the energy accumulator 201 after being throttled, so that the purpose of cold accumulation is achieved.

In some embodiments, the valve assembly includes a second control valve 211, and the second control valve 211 is disposed on a connection line between the indoor heat exchanger 301 and a first connection point on a line connecting the outdoor heat exchanger 105 with the first control valve 207 and the first throttle member 206.

By providing the second control valve 211, the connection between the indoor heat exchanger 301 and the first connection point can be made, and the first connection point is communicated with the outdoor heat exchanger 105, so that the connection between the indoor heat exchanger 301 and the outdoor heat exchanger 105 and the connection between the indoor heat exchanger 301 and the energy accumulator 201 can be made.

In some embodiments, the valve assembly comprises a third control valve 208, the third control valve 208 being arranged on a connection line between the first end of the accumulator 201 and the exhaust of the compressor 101.

By providing the third control valve 208, the connection line between the first end of the accumulator 201 and the exhaust port of the compressor 101 can be opened and closed. When the first end of the accumulator 201 is communicated with the exhaust port of the compressor 101, the exhaust gas of the compressor 101 can directly enter the accumulator 201, so that the heat storage function of the accumulator 201 is realized.

In some embodiments, the valve assembly comprises a fourth control valve 210, the fourth control valve 210 being arranged on the connection line between the second end of the accumulator 201 and the air inlet of the compressor 101.

By providing the fourth control valve 210, the connection between the second end of the accumulator 201 and the air inlet of the compressor 101 can be switched on and off. When the second end of the accumulator 201 is communicated with the air inlet of the compressor 101, the refrigerant flowing out of the second end of the accumulator 201 can flow back to the compressor 101, and the cycle after cold accumulation or heat release is completed.

In some embodiments, the valve assembly comprises a second orifice 209, a first end of the second orifice 209 communicates with a second end of the accumulator 201, and a second end of the second orifice 209 communicates with the indoor heat exchanger 301 and the outdoor heat exchanger 105, respectively.

By providing the second throttling element 209, the connection pipeline between the second end of the accumulator 201 and the indoor heat exchanger 301 or the outdoor heat exchanger 105 can be switched on or off. When the second end of the energy accumulator 201 is communicated with the indoor heat exchanger 301, the refrigerant in the energy accumulator 201 may flow to the indoor heat exchanger 301 for heat absorption and evaporation; when the second end of the accumulator 201 is communicated with the outdoor heat exchanger 105, the refrigerant in the accumulator 201 can flow to the outdoor heat exchanger 105, thereby realizing the heat storage function.

In some embodiments, the valve assembly includes a third orifice 106, and the third orifice 106 is disposed on a connection line between the outdoor heat exchanger 105 and the indoor heat exchanger 301.

By providing the third throttling part 106, it is possible to achieve a throttling effect in the heating mode or to intercept a connection pipe between the accumulator 201 and the outdoor heat exchanger 105 in the condensation heat-release mode or the independent heat-release mode.

In some embodiments, the valve assembly comprises a four-way valve 104, the four-way valve 104 comprises a first port, a second port, a third port and a fourth port, the first port is communicated with the exhaust port of the compressor 101, the second port is communicated with the outdoor heat exchanger 105, the third port is communicated with the air inlet of the compressor 101, and the fourth port is communicated with the indoor heat exchanger 301.

By arranging the four-way valve 104, switching between connecting pipelines can be realized, and support is provided for realizing different working modes of the air-conditioning system.

In some embodiments, the valve assembly includes a fifth control valve 221, a sixth control valve 222, a seventh control valve 223, and an eighth control valve 224, the fifth control valve 221 is connected between a first connection line and the third communication port 220a of the storage container 220, the first connection line is a line through which the outdoor heat exchanger 105 communicates with the indoor heat exchanger 301 and the accumulator 201, respectively, the sixth control valve 222 is connected between a connection line between the discharge port of the compressor 101 and the first end of the accumulator 201 and the second communication port 220b of the storage container 220, the seventh control valve 223 is connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the first communication port 220c of the storage container 220, and the eighth control valve 224 is connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the second communication port 220b of the storage container 220.

By providing the fifth control valve 221, the sixth control valve 222, the seventh control valve 223, and the eighth control valve 224, switching of the storage container 220 between the storage state and the release state can be achieved.

In some embodiments, the valve assembly further includes a fourth orifice 225 and a fifth orifice 226, the fourth orifice 225 being connected between the seventh control valve 223 and the first communication port 220c of the storage container 220, and the fifth orifice 226 being connected between the eighth control valve 224 and the second communication port 220b of the storage container 220.

The fourth throttle 225 and the fifth throttle 226 may employ throttle elements such as electronic expansion valves or capillary tubes.

As shown in fig. 1, the storage container 220 is provided with a first communication port 220c, a second communication port 220b, and a third communication port 220a. The first communication port 220c is provided at a lower portion of the storage container 220, and the second and

third communication ports

220b and 220a are provided at an upper portion of the storage container 220. Wherein the third communication port 220a is connected as an inlet to the fifth control valve 221; the second communication port 220b may be connected to the sixth control valve 222 as an inlet or connected to the eighth control valve 224 as an outlet; the first communication port 220c is connected as an outlet to the seventh control valve 223.

In other embodiments, the storage container 220 may be provided with four communication ports, which are connected to the fifth control valve 221, the sixth control valve 222, the seventh control valve 223, and the eighth control valve 224, respectively.

In still other embodiments, the valve assembly includes a tenth control valve 227 and an eleventh control valve 229, the tenth control valve 227 is connected between a first connection line, which is a line through which the outdoor heat exchanger 105 communicates with the indoor heat exchanger 301 and the accumulator 201, respectively, and the fourth communication port 220d of the storage container 220, and the eleventh control valve 229 is connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the fifth communication port 220e of the storage container 220.

By providing the tenth control valve 227 and the eleventh control valve 229, switching of the storage container 220 between the storage state and the release state can be achieved.

In some embodiments, the valve assembly further comprises a seventh orifice 228, the seventh orifice 228 being connected between the eleventh control valve 229 and the fifth communication port 220e of the storage container 220.

The seventh throttling element 228 may be an electronic expansion valve or a capillary tube.

As shown in fig. 24, the storage container 220 is provided with a fourth communication port 220d and a fifth communication port 220e. The fourth communication port 220d is provided at the lower portion of the storage container 220, and the fifth communication port 220e is provided at the upper portion of the storage container 220. The fourth communication port 220d is connected as an inlet to the tenth control valve 227, and the fifth communication port 220e is connected as an outlet to the eleventh control valve 229.

In some embodiments, the air conditioning system further includes a subcooler 109 disposed between the outdoor heat exchanger 105 and the indoor heat exchanger 301, and the subcooler 109 is in communication with an air intake of the compressor 101. By providing the subcooler 109, the cooling capacity of the air conditioning system can be increased.

In some embodiments, the air conditioning system further includes a sixth throttling member 107, the third throttling member 106 is disposed on a connection pipe between the outdoor heat exchanger 105 and the subcooler 109, and the sixth throttling member 107 is disposed on a connection pipe between the third throttling member 106 and a port of the subcooler 109 communicating with an air inlet of the compressor 101.

In some embodiments, the air conditioning system further includes a ninth control valve 108, the ninth control valve 108 being connected between the subcooler 109 and a second connection point, the second connection point being in communication with the third port of the four-way valve 104 and the air inlet of the compressor 101, respectively.

In some embodiments, the air conditioning system further includes a gas-liquid separator 110 in communication with the air intake of the compressor 101. Alternatively, the components communicated with the air inlet of the compressor 101 are communicated with the inlet of the gas-liquid separator 110, and then are separated by the gas-liquid separator 110 and then communicated with the air inlet of the compressor 101.

By providing the gas-liquid separator 110, the liquid entering the compressor 101 can be reduced, and the occurrence of liquid hammer can be prevented.

In some embodiments, the air conditioning system further comprises an oil separator 102 in communication with the discharge port of the compressor 101, and the discharge port of the compressor 101 is separated by the oil separator 102 before communicating with other components in communication with the discharge port of the compressor 101.

By arranging the oil separator 102, lubricating oil in the exhaust gas of the compressor 101 can be separated in time, so that the refrigerant in subsequent circulation still contains impurities such as lubricating oil and the like, and the recycling of the lubricating oil can be realized.

In some embodiments, the air conditioning system further comprises a check valve 103 in communication with the exhaust port of the compressor 101, an inlet of the check valve 103 is in communication with the exhaust port of the compressor 101, and an outlet of the check valve 103 is in communication with a first end of the accumulator 201 and a first port of the four-way valve 104, respectively.

By providing the check valve 103, the refrigerant can be prevented from flowing backward.

In some embodiments, the inlet of the check valve 103 communicates with the outlet of the oil separator 102.

In some embodiments, the connection between the exhaust port of the compressor 101 and the first end of the accumulator 201 is a first gas pipe 202, the connection between the second end of the accumulator 201 and the intake port of the compressor 101 is a second gas pipe 203, the first end of the accumulator 201 is connected with a first liquid pipe 204, and the second end of the accumulator 201 is connected with a second liquid pipe 205.

In some embodiments, the valve assembly comprises a first control valve 207, a second control valve 211, a third control valve 208, a fourth control valve 210, a first throttle 206, a second throttle 209, a third throttle 106, and a four-way valve 104, the first control valve 207 and the first throttle 206 are connected in parallel between a first end of the accumulator 201 and a first connection point, the first connection point is in communication with the outdoor heat exchanger 105, the second control valve 211 is disposed on a connection line between the first connection point and the indoor heat exchanger 301, the third control valve 208 is disposed on a connection line between a first end of the accumulator 201 and an exhaust port of the compressor 101, the fourth control valve 210 is disposed on a connection line between a second end of the accumulator 201 and an air inlet of the compressor 101, the first end of the second throttle 209 is in communication with a second end of the accumulator 201, the second end of the second throttle 209 is in communication with the indoor heat exchanger 301 and the outdoor heat exchanger 105, respectively, the third throttle 106 is disposed on a connection line between the outdoor heat exchanger 105 and the first connection point, the four-way valve 104 comprises a first interface, a second interface and a fourth interface, the fourth interface is in communication with the outdoor heat exchanger 101, the outdoor interface is in communication with the outdoor heat exchanger 105, the fourth interface is in communication with the outdoor heat exchanger 101, the fourth interface is in communication with the outdoor interface, and the fourth interface is in communication with the outdoor heat exchanger 101.

As shown in fig. 1, in some embodiments, the valve assembly includes a first control valve 207, a second control valve 211, a third control valve 208, a fourth control valve 210, a fifth control valve 221, a sixth control valve 222, a seventh control valve 223, an eighth control valve 224, a first throttle 206, a second throttle 209, a third throttle 106, a fifth throttle 225, a sixth throttle 226, and a four-way valve 104, the first control valve 207 and the first throttle 206 are connected in parallel between a first end of the accumulator 201 and a first connection point, the first connection point is communicated with the outdoor heat exchanger 105, the second control valve 211 is disposed on a connection line between the first connection point and the indoor heat exchanger 301, the third control valve 208 is disposed on a connection line between the first end of the accumulator 201 and the discharge port of the compressor 101, the fourth control valve 210 is disposed on a connection line between the second end of the accumulator 201 and the intake port of the compressor 101, a first end of the second throttling element 209 is communicated with a second end of the accumulator 201, a second end of the second throttling element 209 is respectively communicated with the indoor heat exchanger 301 and the outdoor heat exchanger 105, the third throttling element 106 is arranged on a connecting pipeline between the outdoor heat exchanger 105 and a first connecting point, the four-way valve 104 comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with an exhaust port of the compressor 101, the second interface is communicated with the outdoor heat exchanger 105, the third interface is communicated with an air inlet of the compressor 101, the fourth interface is communicated with the indoor heat exchanger 301, the fifth control valve 221 is connected between the first connecting pipeline and a third communicating port 220a of the storage container 220, the first connecting pipeline is a pipeline through which the outdoor heat exchanger 105 is respectively communicated with the indoor heat exchanger 301 and the accumulator 201, the sixth control valve 222 is connected between a connecting pipeline through which the exhaust port of the compressor 101 and the first end of the accumulator 201 and a second communicating port 220b of the storage container 220 The seventh control valve 223 is connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the first communication port 220c of the storage tank 220, the eighth control valve 224 is connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the second communication port 220b of the storage tank 220, the fourth orifice 225 is connected between the seventh control valve 223 and the first communication port 220c of the storage tank 220, and the fifth orifice 226 is connected between the eighth control valve 224 and the second communication port 220b of the storage tank 220.

An end of the fifth control valve 221 remote from the storage container 220 is connected to a connection line between the first connection point and the outdoor heat exchanger 105. An end of the sixth control valve 222 remote from the storage container 220 is connected to a connection line between the third control valve 208 and the discharge port of the compressor 101. An end of the seventh control valve 223 remote from the storage container 220 is connected to a connection line between the fourth control valve 210 and the air inlet of the compressor 101. An end of the eighth control valve 224 remote from the storage container 220 is connected to a connection line between the fourth control valve 210 and the air inlet of the compressor 101.

As shown in fig. 24, in some embodiments, the valve assembly includes a first control valve 207, a second control valve 211, a third control valve 208, a fourth control valve 210, a tenth control valve 227, an eleventh control valve 229, a first throttle 206, a second throttle 209, a third throttle 106, a seventh throttle 228, and a four-way valve 104, the first control valve 207 and the first throttle 206 are connected in parallel between a first end of the accumulator 201 and a first connection point, the first connection point being communicated with the outdoor heat exchanger 105, the second control valve 211 is disposed on a connection line between the first connection point and the indoor heat exchanger 301, the third control valve 208 is disposed on a connection line between a first end of the accumulator 201 and a discharge port of the compressor 101, the fourth control valve 210 is disposed on a connection line between a second end of the accumulator 201 and an intake port of the compressor 101, a first end of the second throttle 209 is communicated with a second end of the accumulator 201, a second end of the second throttling element 209 is respectively communicated with the indoor heat exchanger 301 and the outdoor heat exchanger 105, the third throttling element 106 is arranged on a connecting pipeline between the outdoor heat exchanger 105 and the first connecting point, the four-way valve 104 comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with an exhaust port of the compressor 101, the second interface is communicated with the outdoor heat exchanger 105, the third interface is communicated with an air inlet of the compressor 101, the fourth interface is communicated with the indoor heat exchanger 301, the tenth control valve 227 is connected between the first connecting pipeline and the fourth communicating port 220d of the storage container 220, the first connecting pipeline is a pipeline through which the outdoor heat exchanger 105 is respectively communicated with the indoor heat exchanger 301 and the accumulator 201, the eleventh control valve 229 is connected between a connecting pipeline between the second end of the accumulator 201 and the air inlet of the compressor 101 and the fifth communicating port 220e of the storage container 220, the seventh orifice 228 is connected between the eleventh control valve 229 and the fifth communication port 220e of the storage container 220.

An end of the tenth control valve 227 remote from the storage container 220 is connected to a connection line between the first connection point and the outdoor heat exchanger 105. An end of the eleventh control valve 229 remote from the storage container 220 is connected to a connection line between the fourth control valve 210 and the air inlet of the compressor 101.

In some embodiments of the air conditioning system provided by the present invention, the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the fifth control valve 221, the sixth control valve 222, the seventh control valve 223, the eighth control valve 224, the ninth control valve 108, the tenth control valve 227, and the eleventh control valve 229 may be implemented by an on-off valve, a proportional valve, or the like.

In some embodiments of the air conditioning system provided by the present invention, the first throttle 206, the second throttle 209, the third throttle 106, and the sixth throttle 107 may be electronic expansion valves, etc.

In some embodiments of the air conditioning system provided by the present invention, the storage container 220 may be a container having the ability to store and release the refrigerant, such as a liquid storage tank.

The storage container 220 is used to solve the problem of different demands for the amount of the circulating refrigerant in each working mode of the air conditioning system. When the demand of the quantity of the circulating refrigerant is low, the circulating refrigerant can be stored through a storage container; when the demand of the circulating refrigerant quantity is high, the refrigerant stored in the storage container can be released for supplement.

When unconventional refrigeration and unconventional heating are carried out, the energy accumulator itself serves as an evaporator or a condenser and needs to exchange heat with a circulating refrigerant; during normal refrigeration and normal heating, the circulating refrigerant does not pass through the accumulator, and the accumulator can store part of the refrigerant. Moreover, the main function of the energy accumulator is heat exchange, the designed volume of the energy accumulator is related to the heat exchange requirement of the energy accumulator, the volume is limited, and the internal structures of the energy accumulator are refrigerant pipes, so that the quantity of refrigerants stored and released by the energy accumulator is limited. And the storage container (such as a liquid storage tank) can design the capacity volume according to the difference value of the maximum required circulation volume and the minimum required circulation volume of the air conditioning system, has more advantages than an energy accumulator, can realize the adjustment of refrigerant quantities with different requirements through liquid inlet and liquid discharge control, and is simpler and easier to operate.

The utility model provides an air conditioning system passes through the state of adjusting valve subassembly, can realize conventional refrigeration, complete cold-storage, the refrigeration cold-storage, the subcooling is released cold, the condensation is released cold, parallelly connected release cold, conventional heating, complete heat accumulation, mix 11 kinds of at least working modes such as heat release and independent heat release, and, storage container 220 can all have the closed condition in every working mode, storage refrigerant state or release refrigerant state to satisfy user's different demands, air conditioning system's application range has been widened simultaneously, air conditioning system's the rate of utilization has been improved greatly. Moreover, the utility model discloses an air conditioning system's pipeline is retrencied, and the cost is lower.

In some embodiments, the present invention provides an air conditioning system, comprising:

determining the working mode of the air conditioning system;

the operation of the valve assembly and the state of the storage container 220 in the air conditioning system are controlled according to a preset control strategy and based on the operation mode.

determining the working mode of the air conditioning system;

the actuation of the valve assembly in the air conditioning system, the state of the accumulator 201 and the state of the storage container 220 are controlled according to a preset control strategy and based on the operating mode.

At present, in order to save power resources, time-of-use electricity price policies are adopted in many cities, for example, in the peak period of electricity utilization, the electricity price is higher, so that the awareness of saving electricity of people is improved through the improvement of cost; in the time period of the power utilization valley, the electricity price is lower, people are guided to use the power resource in a staggered mode, and the situation that the power supply system is stressed is avoided.

Therefore, in the control flow of the air conditioning system provided by the utility model, the work mode of determining the air conditioning system includes:

in a period when the power supply system has a high electricity price, determining that the working mode of the air conditioning system is a mode corresponding to the state that the energy accumulator 201 is in a non-working state, a cold quantity releasing state or a heat quantity releasing state;

in a period when the power supply system is at a low electricity price, the working mode of the air conditioning system is determined to be a mode corresponding to the state that the energy accumulator 201 is in a non-working state, a cold storage state or a heat storage state.

The working mode of the air conditioning system is determined according to the electricity price of the power supply system, the cold or heat can be stored through the energy accumulator 201 in a low electricity price period, and the air conditioning system is set to be in a mode corresponding to the non-working state, the cold releasing state or the heat releasing state of the energy accumulator 201 in a high electricity price period, so that the purpose of refrigeration or heating is mainly or auxiliarily realized by utilizing the heat or the cold stored in advance by the energy accumulator 201, the working frequency of the compressor 101 is reduced, the power consumption of the air conditioning system in a high electricity price period is reduced, and the economic pressure of a user is reduced; the method is also favorable for realizing peak shifting power utilization and reducing the power supply pressure of a power supply system.

In some embodiments, the air conditioning system may determine the operation mode of the air conditioning system according to the current demand of the user, or may automatically determine the operation mode of the air conditioning system according to a pre-stored charging standard of the power supply system.

In some embodiments, determining the operating mode of the air conditioning system comprises:

detecting whether energy is stored in the energy accumulator 201;

and determining the working mode of the air conditioning system according to the detection result.

In some embodiments, determining the operation mode of the air conditioning system according to the detection result includes:

when detecting that there is no energy in the energy accumulator 201, determining that the operating mode of the air conditioning system is a mode corresponding to the energy accumulator 201 being in a non-operating state, a heat storage state or a cold storage state.

When detecting that energy is stored in the energy accumulator 201, it may be determined according to the requirement that the operating mode of the air conditioning system is a mode corresponding to the energy accumulator 201 being in a non-operating state, a heat storage state, a cold storage state, a heat release state, or a cold release state.

When the energy in the accumulator 201 is used, the energy remaining amount in the accumulator 201 is detected in real time, and when it is detected that the energy remaining amount is close to zero, the use of the energy in the accumulator 201 is stopped.

Similarly, the same operations may be employed for the storage vessel 220 as for the accumulator 201, such as:

when it is detected that there is no refrigerant in the storage container 220, determining that the storage container 220 is in a closed state and a refrigerant storage state;

when the refrigerant is detected to be stored in the storage container 220, the state of the storage container 220 may be determined to be a closed state, a refrigerant storage state, or a refrigerant release state according to a requirement.

When the storage container 220 is in a refrigerant releasing state, the refrigerant remaining amount in the storage container 220 is detected in real time, and when the refrigerant remaining amount is detected to be close to zero, the refrigerant releasing is stopped.

determining the working mode of the air conditioning system;

the actions of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttle 206, the second throttle 209, the third throttle 106 and the four-way valve 104 in the air conditioning system and the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201 and the storage container 220 are controlled according to a preset control strategy and based on the operation mode.

In some embodiments, controlling the actions of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttle 206, the second throttle 209, the third throttle 106, and the four-way valve 104 in the air conditioning system and the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 according to a preset control strategy and based on the operation mode includes:

when the working mode is a conventional refrigeration mode, the four-way valve 104 is controlled to be powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface;

controlling the second control valve 211 to be opened, and closing the first control valve 207, the third control valve 208 and the fourth control valve 210;

the first throttling element 206 and the second throttling element 209 are controlled to be in a closed state, and the third throttling element 106 is controlled to be in an open state, and the opening size is adjustable; and

controlling the storage container 220 to be in a closed state, a refrigerant storage state or a refrigerant release state;

wherein the indoor heat exchanger 301 functions as an evaporator, the outdoor heat exchanger 105 functions as a condenser, and the accumulator 201 is turned off.

when the working mode is the complete cold accumulation mode, the four-way valve 104 is controlled to be powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface;

controlling the fourth control valve 210 to open, and closing the first control valve 207, the third control valve 208 and the second control valve 211;

the first throttling element 206 is controlled to be in an opening state and the opening size is adjustable, the second throttling element 209 is controlled to be in a closing state, and the third throttling element 106 is controlled to be in an opening state and the opening size is adjustable; and

wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 functions as a condenser, and the accumulator 201 functions as an evaporator.

In some embodiments, controlling the actions of the first control valve 207, the second control valve 211, the third control valve 208, the fourth control valve 210, the first throttle 206, the second throttle 209, the third throttle 106, and the four-way valve 104, and the states of the outdoor heat exchanger 105, the indoor heat exchanger 301, the accumulator 201, and the storage container 220 in the air conditioning system according to a preset control strategy and based on the operation mode includes:

when the working mode is a refrigeration and cold accumulation mode, the four-way valve 104 is controlled to be powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface;

the fourth control valve 210 and the second control valve 211 are controlled to be opened, and the first control valve 207 and the third control valve 208 are controlled to be closed;

among them, the indoor heat exchanger 301 serves as an evaporator, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as an evaporator.

when the working mode is the supercooling cold release mode, controlling the four-way valve 104 to be powered off, wherein the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface;

controlling the first control valve 207 to be opened, and the third control valve 208, the fourth control valve 210 and the second control valve 211 to be closed;

controlling the first throttling element 206 to be in a closed state, the second throttling element 209 to be in an open state, and the third throttling element 106 to be in an open state, wherein the opening size is adjustable; and

among them, the indoor heat exchanger 301 serves as an evaporator, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as a subcooler.

when the working mode is a condensing and cooling mode, the four-way valve 104 is controlled to be powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface;

the third control valve 208 is controlled to be opened, and the first control valve 207, the fourth control valve 210 and the second control valve 211 are closed;

the first throttling element 206 and the third throttling element 106 are controlled to be in a closed state, and the second throttling element 209 is controlled to be in an open state; and

wherein the indoor heat exchanger 301 functions as an evaporator, the outdoor heat exchanger 105 is turned off, and the accumulator 201 functions as a condenser.

when the working mode is the parallel cold release mode, the four-way valve 104 is controlled to be powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface;

controlling the third control valve 208 and the second control valve 211 to be opened, and the first control valve 207 and the fourth control valve 210 to be closed; and

the first throttling element 206 is controlled to be in a closed state, the second throttling element 209 and the third throttling element 106 are both in an open state, and the opening size is adjustable; and

among them, the indoor heat exchanger 301 serves as an evaporator, and the outdoor heat exchanger 105 and the accumulator 201 each serve as a condenser.

when the working mode is the conventional heating mode, the four-way valve 104 is controlled to be powered on, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface;

the second control valve 211 is controlled to be opened, and the first control valve 207, the third control valve 208 and the fourth control valve 210 are controlled to be closed;

the first throttling element 206 and the second throttling element 209 are controlled to be in a closed state, the third throttling element 106 is controlled to be in an open state, and the opening size is adjustable; and

wherein the indoor heat exchanger 301 functions as a condenser, the outdoor heat exchanger 105 functions as an evaporator, and the accumulator 201 is turned off.

when the working mode is the complete heat storage mode, the four-way valve 104 is controlled to be powered on, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface;

controlling the third control valve 208 and the second control valve 211 to be opened, and the first control valve 207 and the fourth control valve 210 to be closed;

wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 functions as an evaporator, and the accumulator 201 functions as a condenser.

when the working mode is a heating and heat storage mode, the four-way valve 104 is controlled to be powered on, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface;

the third control valve 208 and the second control valve 211 are controlled to be opened, and the first control valve 207 and the fourth control valve 210 are controlled to be closed;

among them, the indoor heat exchanger 301 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the accumulator 201 serves as a condenser.

when the working mode is the mixed heat release mode, the four-way valve 104 is controlled to be powered on, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface;

the first throttling element 206 and the third throttling element 106 are controlled to be in an opening state, the opening size is adjustable, and the second throttling element 209 is controlled to be in a closing state; and

among them, the indoor heat exchanger 301 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the accumulator 201 serves as an evaporator.

when the working mode is the independent heat release mode, the four-way valve 104 is controlled to be powered on, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface;

the first throttling element 206 is controlled to be in an opening state, the opening size is adjustable, and the second throttling element 209 and the third throttling element 106 are both in a closing state; and

wherein the indoor heat exchanger 301 functions as a condenser, the outdoor heat exchanger 105 is turned off, and the accumulator 201 functions as an evaporator.

In some embodiments, controlling the storage container 220 to be in a closed state, a refrigerant storage state or a refrigerant release state includes:

providing a valve assembly including a fifth control valve 221, a sixth control valve 222, a seventh control valve 223, and an eighth control valve 224, the fifth control valve 221 being connected between a first connection line and the third communication port 220a of the storage container 220, the first connection line being a line through which the outdoor heat exchanger 105 communicates with the indoor heat exchanger 301 and the accumulator 201, respectively, the sixth control valve 222 being connected between a connection line between the discharge port of the compressor 101 and the first end of the accumulator 201 and the second communication port 220b of the storage container 220, the seventh control valve 223 being connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the first communication port 220c of the storage container 220, the eighth control valve 224 being connected between a connection line between the second end of the accumulator 201 and the intake port of the compressor 101 and the second communication port 220b of the storage container 220;

the fifth control valve 221, the sixth control valve 222, the seventh control valve 223, and the eighth control valve 224 are controlled to close to bring the storage container 220 into a closed state;

the fifth control valve 221 and the eighth control valve 224 are controlled to be opened, and the sixth control valve 222 and the seventh control valve 223 are controlled to be closed, so that the storage container 220 enters a refrigerant storage state; or

The sixth control valve 222 and the seventh control valve 223 are controlled to be opened, and the fifth control valve 221 and the eighth control valve 224 are controlled to be closed, so that the storage container 220 enters a refrigerant releasing state.

providing a valve assembly including a tenth control valve 227 and an eleventh control valve 229, the tenth control valve 227 being connected between a first connecting line and the fourth communication port 220d of the storage container 220, the first connecting line being a line through which the outdoor heat exchanger 105 communicates with the indoor heat exchanger 301 and the accumulator 201, respectively, and the eleventh control valve 229 being connected between a connecting line between the second end of the accumulator 201 and the air inlet of the compressor 101 and the fifth communication port 220e of the storage container 220;

the tenth control valve 227 and the eleventh control valve 229 are controlled to be closed to bring the storage container 220 into a closed state;

the tenth control valve 227 and the eleventh control valve 229 are controlled to be opened, so that the storage container 220 enters a refrigerant storage state; or

The tenth control valve 227 is controlled to be closed, and the eleventh control valve 229 is controlled to be opened, so that the storage container 220 is brought into a refrigerant releasing state.

The operation of the air conditioning system provided by the present invention is described below with reference to fig. 1 to 24:

as shown in fig. 1, the air conditioning system includes an outdoor unit 1, an energy storage device 2, and an indoor unit.

An oil separator 102, a check valve 103, and a four-way valve 104 are connected in this order to the outlet of the compressor 101 of the outdoor unit 1. The four-way valve 104 can be communicated with an outdoor heat exchanger 105, the outdoor heat exchanger 105 is communicated with a third throttling element 106, one path of the third throttling element 106 is connected to the energy storage device 2 through a cooler 109, the other path of the third throttling element 106 is communicated with a gas-liquid separator 110 through a sixth throttling element 107, a subcooler 109 and a ninth control valve 108, and the outlet of the gas-liquid separator 110 is communicated with the gas inlet of the compressor 101.

The energy storage device 2 is connected with the outdoor unit 1 through 4 pipelines including a first gas pipe 202, a second gas pipe 203, a liquid side header pipe 3 and a gas side header pipe 4. The energy storage equipment 2 is connected with the indoor unit through 2 pipelines including a liquid side header pipe 3 and a gas side header pipe 4. The energy storage device 2 comprises an energy storage 201 and a storage container 220.

One end of the liquid side header pipe 3 is connected to the indoor unit, the other end is provided with 3 branches, the first branch is connected with a third communicating port 220a of the storage container 220 through a fifth control valve 221, the second branch is connected with one port of the energy accumulator 201 through a first liquid pipe 204, and the third branch is connected with the second liquid pipe 205 and the other port of the energy accumulator 201 through a second throttling element 209.

One end of the first air pipe 202 is connected to the exhaust port of the compressor 101, and the other end is divided into 2 branches, the first branch is connected to the second communication port 220b of the storage container 220 through the sixth control valve 222, and the second branch is connected to one port of the accumulator 201 through the third control valve 208.

One end of the second gas pipe 203 is connected to the inlet of the gas-liquid separator 110, the other end is divided into 3 branches, the first branch is connected to the other port of the accumulator 201 through the fourth control valve 210 and the second liquid pipe 205, the second branch is connected to the pipeline between the second communicating port 220b and the sixth control valve 222 of the storage container 220 through the eighth control valve 224 and the fifth throttling element 226, and the third branch is connected to the first communicating port 220c of the storage container 220 through the seventh control valve 223 and the fourth throttling element 225. One end of the air side header pipe 4 is connected to the indoor unit, and the other end is connected to the four-way valve 104.

The first end of the accumulator 201 is connected with the exhaust pipeline of the compressor 101 through a first gas pipe 202 and is connected with the liquid side header pipe 3 through a first liquid pipe 204; a second end of the accumulator 201 is connected to the inlet pipe of the gas-liquid separator 110 via a second gas pipe 203, and is connected to the liquid-side header pipe 3 via a second liquid pipe 205. In order to realize the switching of the functions, a third control valve 208 is arranged on the first gas pipe 202 of the accumulator 201, and a first throttling element 206 and a first control valve 207 are arranged on the first liquid pipe 204 and are in parallel connection; a fourth control valve 210 is disposed on the second air pipe 203, and a second orifice 209 is disposed on the second liquid pipe 205. The liquid side manifold 3 is provided with a second control valve 211 between a connection to the first liquid pipe 204 and a connection to the second liquid pipe 205. The liquid side header pipe 3 and the air side header pipe 4 are connected to both sides of the indoor heat exchanger 301 of the indoor unit, respectively.

The first control valve 207 is a cool release valve, the second control valve 211 is a bypass valve, the third control valve 208 is a high pressure gas valve, and the fourth control valve 210 is a heat release valve. The fifth control valve 221 is a liquid inlet valve, the sixth control valve 222 is a pressure valve, the seventh control valve 223 is a liquid outlet valve, and the eighth control valve 224 is a gas balance valve. The first throttle 206 and the second throttle 209 may be energy storage electronic expansion valves, the third throttle 106 may be a heating electronic expansion valve, the sixth throttle 107 may be a supercooling electronic expansion valve, and the ninth control valve 108 may be a supercooling valve.

The embodiment provides a multifunctional energy storage air conditioning system which can provide energy storage and release services for various different power load transfer scenes.

The energy accumulator 201 is filled with energy storage materials, such as organic phase change materials such as ice water and paraffin, and inorganic phase change materials such as mirabilite. The energy accumulator 201 is provided with a refrigerant pipeline, and the refrigerant flows in the pipeline and fully exchanges heat with the energy storage material, so that the cold and heat can be stored and released.

Through the switching of the valve components, various functions such as conventional refrigeration, complete cold accumulation, refrigeration cold accumulation, supercooling cold release, condensation cold release, conventional heating, complete heat accumulation, heating and heat accumulation, mixed heat release, independent heat release, defrosting and the like can be realized.

Referring to table 1, a table is shown for each operating mode and the state of each component in the valve assembly and the state of the heat exchanger.

TABLE 1 correspondence table of operating modes and valve states

As shown in fig. 2, in the normal refrigeration storage refrigerant mode:

the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, and the first control valve 207, the third control valve 208, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are all closed; the first throttling element 206 and the second throttling element 209 are both in a closed state, and the third throttling element 106 is in an open state and has an adjustable opening size; wherein the indoor heat exchanger 301 functions as an evaporator, the outdoor heat exchanger 105 functions as a condenser, and the accumulator 201 is turned off.

The refrigerant discharged from the compressor 101 passes through the outdoor heat exchanger 105, enters the indoor unit through the liquid-side header pipe 3, evaporates in the indoor unit, and returns to the suction side of the compressor 101 through the gas-side header pipe 4 and the gas-liquid separator 110. The accumulator 201 is not used at this time, and only the normal refrigeration cycle function is realized.

In addition, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure enters the storage container through the fifth control valve 221, so that the refrigerant storage function in the conventional refrigeration cycle is realized.

As shown in fig. 3, in the normal cooling/refrigerant releasing mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, and the first control valve 207, the third control valve 208, the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are all closed; the first throttling element 206 and the second throttling element 209 are both in a closed state, and the third throttling element 106 is in an open state and has an adjustable opening size; wherein the indoor heat exchanger 301 functions as an evaporator, the outdoor heat exchanger 105 functions as a condenser, and the accumulator 201 is turned off.

The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, enters the indoor unit through the liquid side header pipe 3, evaporates in the indoor unit, and returns to the suction side of the compressor 101 through the gas side header pipe 4 and the gas-liquid separator 110. The accumulator 201 is not used at this time, and only the normal refrigeration cycle function is realized.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 by the high pressure, thereby implementing the refrigerant release function in the conventional refrigeration cycle.

As shown in fig. 4, in the full cold storage refrigerant storage mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the fourth control valve 210, the fifth control valve 221, and the eighth control valve 224 are opened, and the first control valve 207, the third control valve 208, and the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are all closed; the first throttling element 206 is in an open state and the opening size is adjustable, the second throttling element 209 is in a closed state, and the third throttling element 106 is in an open state and the opening size is adjustable; wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as an evaporator.

The refrigerant discharged from the compressor 101 passes through the outdoor heat exchanger 105, enters the accumulator 201 through the liquid-side header pipe 3 and the first throttle 206, evaporates, and returns to the suction side of the compressor 101 through the second gas pipe 203 and the gas-liquid separator 110. The refrigerant is evaporated in the accumulator 201 without flowing through the indoor unit, and the cooling energy is stored in the accumulator 201.

In addition, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, thereby realizing a refrigerant storage function during a complete cold storage cycle.

As shown in fig. 5, in the full cold accumulation and release refrigerant mode:

the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the fourth control valve 210, the sixth control valve 222 and the seventh control valve 223 are opened, and the first control valve 207, the third control valve 208 and the second control valve 211, the fifth control valve 221 and the eighth control valve 224 are closed; the first throttling element 206 is in an open state and the opening size is adjustable, the second throttling element 209 is in a closed state, and the third throttling element 106 is in an open state and the opening size is adjustable; wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 functions as a condenser, and the accumulator 201 functions as an evaporator.

The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, enters the accumulator 201 through the liquid side header pipe 3 and the first throttle 206, evaporates, and returns to the suction side of the compressor 101 through the second gas pipe 203 and the gas-liquid separator 110. The refrigerant is evaporated in the accumulator 201 without flowing through the indoor unit, and the cooling energy is stored in the accumulator 201.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 by the high pressure, thereby implementing the refrigerant release function during the complete cold storage cycle.

As shown in fig. 6, in the cooling cold storage refrigerant storage mode:

the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, and the first control valve 207, the third control valve 208, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttle 206 is in an open state and the opening size is adjustable, the second throttle 209 is in a closed state, and the third throttle 106 is in an open state and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as an evaporator, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as an evaporator.

The refrigerant discharged from the compressor 101 passes through the outdoor heat exchanger 105 and is divided into two paths by the liquid side header pipe 3, one path enters the accumulator 201 through the first throttling element 206, flows into the second air pipe 203 after being evaporated, the other path enters the indoor heat exchanger 301 for evaporation, and the two paths are converged at the inlet of the gas-liquid separator 110 and return to the suction side of the compressor 101. At this time, the energy accumulator 201 and the indoor heat exchanger simultaneously serve as evaporators, the energy accumulator 201 stores cold, and the indoor heat exchanger 301 provides cold energy to the indoor space.

In addition, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, thereby realizing the refrigerant storage function during the refrigeration and cold accumulation cycle.

As shown in fig. 7, in the cooling cold storage refrigerant release mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, and the first control valve 207, the third control valve 208, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttle 206 is in an open state and the opening size is adjustable, the second throttle 209 is in a closed state, and the third throttle 106 is in an open state and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as an evaporator, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as an evaporator.

The refrigerant discharged from the compressor 101 passes through the outdoor heat exchanger 105 and is divided into two paths by the liquid side header pipe 3, one path enters the accumulator 201 through the first throttle member 206, flows into the second air pipe 203 after being evaporated, the other path enters the indoor heat exchanger for evaporation, and the two paths are converged at the inlet of the gas-liquid separator 110 and return to the suction side of the compressor 101. At this time, the energy accumulator 201 and the indoor heat exchanger are simultaneously used as evaporators, the energy accumulator 201 stores cold, and the indoor heat exchanger provides cold for the indoor.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 by the high pressure, thereby performing a refrigerant release function during the cooling and cold accumulation cycle.

As shown in fig. 8, in the supercooled refrigerant release storage refrigerant mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the first control valve 207, the fifth control valve 221, and the eighth control valve 224 are opened, and the third control valve 208, the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 is in a closed state, the second throttling element 209 is in an open state, the third throttling element 106 is in an open state, and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as an evaporator, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as a subcooler.

The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, enters the accumulator 201 through the liquid-side header pipe 3 and the first control valve 207, is subcooled, enters the liquid-side header pipe 3 through the second liquid pipe 205 and the second throttle 209, is evaporated in the indoor heat exchanger 301, and then returns to the suction side of the compressor 101 through the gas-side header pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 serves as a subcooler, and releases cold energy to the refrigerant condensed in the outdoor heat exchanger 105, so that the subcooled refrigerant is further increased and flows into the indoor unit for evaporation, and the refrigerating capacity of the refrigerant is improved.

And, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, the second control valve 211 is opened, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, thereby realizing the refrigerant storage function during the refrigeration and supercooling release cycle.

As shown in fig. 9, in the supercooled refrigerant release and refrigerant release mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the first control valve 207, the sixth control valve 222, and the seventh control valve 223 are opened, and the third control valve 208, the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 is in a closed state, the second throttling element 209 is in an open state, the third throttling element 106 is in an open state, and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as an evaporator, the outdoor heat exchanger 105 serves as a condenser, and the accumulator 201 serves as a subcooler.

The refrigerant discharged from the compressor 101 flows through the outdoor heat exchanger 105, enters the accumulator 201 through the liquid-side header pipe 3 and the first control valve 207, is supercooled, then enters the liquid-side header pipe 3 through the second liquid pipe 205 and the second throttle 209, is evaporated in the indoor heat exchanger, and then returns to the suction side of the compressor 101 through the gas-side header pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 serves as a subcooler, and releases cold energy to the refrigerant condensed in the outdoor heat exchanger 105, so that the subcooled refrigerant is further increased and flows into the indoor unit for evaporation, and the refrigerating capacity of the refrigerant is improved.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 by a high pressure, thereby implementing a refrigerant release function in a cooling and supercooling release cycle.

As shown in fig. 10, in the condensing and cooling storage refrigerant mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the third, second, fifth and

eighth control valves

208, 211, 221 and 224 are opened, and the first, fourth, sixth and

seventh control valves

207, 210, 222 and 223 are closed; the first and

third throttling elements

206, 106 are in a closed state, the second throttling element 209 is in an open state; wherein the indoor heat exchanger 301 functions as an evaporator, the outdoor heat exchanger 105 is turned off, and the accumulator 201 functions as a condenser.

The refrigerant discharged from the compressor 101 flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208, is condensed, then flows into the liquid side header pipe 3 through the second liquid pipe 205 and the second throttle 209, is evaporated in the indoor heat exchanger, and then returns to the suction side of the compressor 101 through the gas side header pipe 4 and the gas-liquid separator 110. Instead of using the outdoor heat exchanger 105, the accumulator 201 is used as a condenser to provide cooling energy for the refrigeration cycle. Because the temperature of the cold storage material in the energy accumulator 201 is far lower than the outdoor ambient temperature, the refrigeration cycle can be operated under the condition of low pressure ratio, and the load of the compressor 101 is greatly reduced.

And, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, the second control valve 211 is opened, and the refrigerant at the middle pressure section enters the storage container through the fifth control valve 221, thereby realizing the refrigerant storage function during the refrigeration and condensation cooling-release cycle.

As shown in fig. 11, in the condensing, cooling and refrigerant releasing mode:

when the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the third, sixth and

seventh control valves

208, 222 and 223 are opened, and the first, fourth, second, fifth and

eighth control valves

207, 210, 211, 221 and 224 are closed; the first and

third throttling elements

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 under the high pressure, thereby performing a refrigerant discharge function during a cooling and condensing discharge cycle.

As shown in fig. 12, in the parallel cooling storage refrigerant mode:

the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the third control valve 208 and the second control valve 211 are opened, and the first throttle 206, the first control valve 207, and the fourth control valve 210 are closed; the second throttling element 209 and the third throttling element 106 are both in an open state and have adjustable opening sizes; among them, the indoor heat exchanger 301 serves as an evaporator, and the outdoor heat exchanger 105 and the accumulator 201 each serve as a condenser.

The refrigerant discharged from the compressor 101 is divided into two paths, and the first path flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208 to be condensed, and then enters the liquid side header pipe 3 through the second liquid pipe 205 and the second throttling element 209; the other path is condensed by the outdoor heat exchanger 105, passes through the liquid side header pipe 3 and the second control valve 211, then is merged with the first path, enters the indoor heat exchanger 301 for evaporation, passes through the gas side header pipe 4 and the gas-liquid separator 110, and returns to the suction side of the compressor 101. At this time, the accumulator 201 and the outdoor heat exchanger 105 are used together for condensation. Because the energy accumulator 201 and the outdoor heat exchanger 105 are used as condensing equipment at the same time, larger condensing capacity can be provided, and the requirement of high-load operation of the unit is met.

In addition, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, the second control valve 211 is opened, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, thereby realizing the refrigerant storage function in the parallel cooling release cycle.

As shown in fig. 13, in the parallel-refrigerant-releasing/releasing mode:

the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the third control valve 208 and the second control valve 211 are opened, and the first throttle 206, the first control valve 207, and the fourth control valve 210 are closed; the second throttling element 209 and the third throttling element 106 are both in an opening state, and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as an evaporator, and the outdoor heat exchanger 105 and the accumulator 201 each serve as a condenser.

The refrigerant discharged from the compressor 101 is divided into two paths, and the first path flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208 to be condensed, and then enters the liquid side header pipe 3 through the second liquid pipe 205 and the second throttling element 209; the other path is condensed by the outdoor heat exchanger 105, then passes through the liquid side header pipe 3 and the second control valve 211, then is merged with the first path, enters the indoor heat exchanger 301 for evaporation, and then returns to the suction side of the compressor 101 through the gas side header pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 and the outdoor heat exchanger 105 are used together for condensation. Because the energy accumulator 201 and the outdoor heat exchanger 105 are used as condensing equipment at the same time, a larger condensing amount can be provided, and the requirement of high-load operation of the unit is met.

As shown in fig. 14, in the normal heating storage refrigerant mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, and the first control valve 207, the third control valve 208, the fourth control valve 210, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 and the second throttling element 209 are in a closed state, the third throttling element 106 is in an open state, and the opening size is adjustable; wherein the indoor heat exchanger 301 functions as a condenser, the outdoor heat exchanger 105 functions as an evaporator, and the accumulator 201 is turned off.

The refrigerant discharged from the compressor 101 flows into the indoor heat exchanger through the gas-side header pipe 4 to be condensed, flows into the outdoor heat exchanger 105 through the liquid-side header pipe 3 to be evaporated, and returns to the suction side of the compressor 101 through the gas-liquid separator 110. At this point, no accumulator is used, only the conventional heating cycle is used.

Moreover, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, so that the refrigerant storage function during the conventional heating cycle is realized.

As shown in fig. 15, in the normal heating and refrigerant releasing mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the second, sixth and

seventh control valves

211, 222 and 223 are opened, and the first, third, fourth, fifth and

eighth control valves

207, 208, 210, 221 and 224 are closed; the first throttling element 206 and the second throttling element 209 are in a closed state, the third throttling element 106 is in an open state, and the opening size is adjustable; wherein the indoor heat exchanger 301 functions as a condenser, the outdoor heat exchanger 105 functions as an evaporator, and the accumulator 201 is turned off.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 under the high pressure, thereby implementing the refrigerant release function in the conventional heating cycle.

As shown in fig. 16, in the complete heat storage refrigerant storage mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the third, second, fifth and

eighth control valves

208, 211, 221 and 224 are opened, and the first, fourth, sixth and

seventh control valves

207, 210, 222 and 223 are closed; the first throttling element 206 is in a closed state, the second throttling element 209 is in an open state, the third throttling element 106 is in an open state, and the opening size is adjustable; wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 functions as an evaporator, and the accumulator 201 functions as a condenser.

The refrigerant discharged from the compressor flows into the accumulator 201 through the first gas pipe 202 and the third control valve 208, is condensed, then flows into the liquid-side header pipe 3 through the second liquid pipe 205 and the second orifice 209, flows into the outdoor heat exchanger 105 through the second control valve 211, is evaporated in the outdoor heat exchanger 105, and then returns to the suction side of the compressor 101 through the four-way valve 104, the gas-side header pipe 4, and the gas-liquid separator 110. At this time, the refrigerant is condensed in the accumulator 201, and heat is stored in the accumulator 201 and evaporated in the outdoor heat exchanger 105.

In addition, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, thereby realizing a refrigerant storage function during a complete heat storage cycle.

As shown in fig. 17, in the complete heat storage and refrigerant release mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the third, second, sixth and

seventh control valves

208, 211, 222 and 223 are opened, and the first, fourth, fifth and

eighth control valves

207, 210, 221 and 224 are closed; the first throttling element 206 is in a closed state, the second throttling element 209 is in an open state, the third throttling element 106 is in an open state, and the opening size is adjustable; wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 functions as an evaporator, and the accumulator 201 functions as a condenser.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 by the high pressure, thereby performing a refrigerant release function during the complete heat storage cycle.

As shown in fig. 18, in the heat storage and heating storage refrigerant mode:

eighth control valves

208, 211, 221 and 224 are opened, and the first, fourth, sixth and

seventh control valves

207, 210, 222 and 223 are closed; the first throttling element 206 is in a closed state, the second throttling element 209 is in an open state, the third throttling element 106 is in an open state, and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the accumulator 201 serves as a condenser.

Refrigerant discharged by the compressor is divided into two paths, wherein one path of refrigerant flows into the energy accumulator 201 through the first air pipe 202 and the third control valve 208 to be condensed and then enters the liquid side header pipe 3 through the second liquid pipe 205 and the second throttling element 209, the other path of refrigerant enters the indoor heat exchanger through the four-way valve 104, the condensed refrigerant enters the liquid side header pipe 3 to be merged with the first path of refrigerant, then flows into the outdoor heat exchanger 105 through the second control valve 211 to be evaporated, and then returns to the suction side of the compressor 101 through the four-way valve 104, the gas side header pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 and the indoor heat exchanger simultaneously function as a condenser, heat is generated while storing heat, and the outdoor heat exchanger 105 functions as an evaporator.

The eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, thereby realizing a refrigerant storage function during heating and heat storage cycles.

As shown in fig. 19, in the heat storage and heat release refrigerant mode:

seventh control valves

208, 211, 222 and 223 are opened, and the first, fourth, fifth and

eighth control valves

207, 210, 221 and 224 are closed; the first throttling element 206 is in a closed state, the second throttling element 209 is in an open state, the third throttling element 106 is in an open state, and the opening size is adjustable; among them, the indoor heat exchanger 301 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the accumulator 201 serves as a condenser.

The refrigerant discharged from the compressor is divided into two paths, wherein one path of refrigerant flows into the energy accumulator 201 through the first gas pipe 202 and the third control valve 208 to be condensed and then enters the liquid side header pipe 3 through the second liquid pipe 205 and the second throttling element 209, the other path of refrigerant enters the indoor heat exchanger through the four-way valve 104, and after being condensed and then enters the liquid side header pipe 3 to be merged with the first path of refrigerant, the condensed refrigerant flows into the outdoor heat exchanger 105 through the second control valve 211 to be evaporated, and then the condensed refrigerant returns to the suction side of the compressor 101 through the four-way valve 104, the gas side header pipe 4 and the gas-liquid separator 110. At this time, the accumulator 201 and the indoor heat exchanger simultaneously function as a condenser, heat is generated while storing heat, and the outdoor heat exchanger 105 functions as an evaporator.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 by the high pressure, thereby performing a refrigerant release function during the heating and heat storage cycle.

As shown in fig. 20, in the mixed heat-release storage refrigerant mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, and the first control valve 207, the third control valve 208, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 and the third throttling element 106 are both in an open state, the opening size is adjustable, and the second throttling element 209 is in a closed state; among them, the indoor heat exchanger 301 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the accumulator 201 serves as an evaporator.

The refrigerant discharged from the compressor 101 flows into the indoor heat exchanger 301 through the gas-side header pipe 4 to be condensed, and then is divided after passing through the second control valve 211, one path of the refrigerant enters the energy accumulator 201 through the first liquid pipe 204 and the first throttle 206 to be evaporated, and then flows into the second gas pipe 203 and the fourth control valve 210, the other path of the refrigerant flows into the outdoor heat exchanger 105 through the liquid-side header pipe 3 to be evaporated, and the two paths of the refrigerant are converged at the inlet section of the gas-liquid separator 110 and return to the suction side of the compressor 101. At this time, the accumulator 201 takes a part of the evaporation load, and increases the suction pressure.

In addition, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the middle pressure stage enters the storage container through the fifth control valve 221, so that the refrigerant storage function during the heating and mixed heat release cycle is realized.

As shown in fig. 21, in the mixed heat release refrigerant mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, and the first control valve 207, the third control valve 208, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 and the third throttling element 106 are both in an open state, the opening size is adjustable, and the second throttling element 209 is in a closed state; among them, the indoor heat exchanger 301 serves as a condenser, the outdoor heat exchanger 105 serves as an evaporator, and the accumulator 201 serves as an evaporator.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 is introduced into the gas-liquid separator 110 through the opened seventh control valve 223 under a high pressure, thereby performing a refrigerant release function during a heating and mixed heat release cycle.

As shown in fig. 22, in the independent heat release storage refrigerant mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the fourth control valve 210, the second control valve 211, the fifth control valve 221, and the eighth control valve 224 are opened, and the first control valve 207, the third control valve 208, the sixth control valve 222, and the seventh control valve 223 are closed; the first throttling element 206 is in an open state and the opening size is adjustable, and the second throttling element 209 and the third throttling element 106 are both in a closed state; wherein the indoor heat exchanger 301 functions as a condenser, the outdoor heat exchanger 105 is turned off, and the accumulator 201 functions as an evaporator.

The refrigerant discharged from the compressor 101 flows into the indoor heat exchanger through the gas-side header 4 to be condensed, passes through the second control valve 211, then enters the accumulator 201 through the first liquid pipe 204 and the first throttle 206 to be evaporated, then flows into the gas-liquid separator 110 through the second gas pipe 203, and returns to the suction side of the compressor 101. The accumulator 201 now carries the full evaporation load.

Furthermore, the eighth control valve 224 is opened, the storage container 220 is at a low pressure, and the refrigerant at the intermediate pressure enters the storage container through the fifth control valve 221, so that the refrigerant storage function during the heating and independent heat release cycles is realized.

As shown in fig. 23, in the independent heat release refrigerant mode:

the four-way valve 104 is electrified, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface; the fourth control valve 210, the second control valve 211, the sixth control valve 222, and the seventh control valve 223 are opened, and the first control valve 207, the third control valve 208, the fifth control valve 221, and the eighth control valve 224 are closed; the first throttling element 206 is in an open state, the opening size is adjustable, and the second throttling element 209 and the third throttling element 106 are both in a closed state; wherein the indoor heat exchanger 301 functions as a condenser, the outdoor heat exchanger 105 is turned off, and the accumulator 201 functions as an evaporator.

The refrigerant discharged from the compressor 101 flows into the indoor heat exchanger through the gas-side header 4 to be condensed, passes through the second control valve 211, then enters the accumulator 201 through the first liquid pipe 204 and the first throttle 206 to be evaporated, then flows into the gas-liquid separator 110 through the second gas pipe 203, and returns to the suction side of the compressor 101. The accumulator 201 now takes the full evaporation load.

The sixth control valve 222 is opened, and the refrigerant in the storage container 220 enters the gas-liquid separator 110 through the opened seventh control valve 223 under the high pressure, thereby implementing the refrigerant release function during the heating and independent heat release cycles.

As shown in fig. 24, it is a schematic structural diagram of another embodiment of the air conditioning system provided by the present invention. In this embodiment, it is different from the embodiment shown in fig. 1 mainly in the position and the number of the communication ports provided to the storage container 220.

In this embodiment, the storage container 220 is provided with two communication ports, a fourth communication port 220d located at the lower portion and a fifth communication port 220e located at the upper portion, respectively. The fourth communication port 220d communicates with the tenth control valve 227, and one end of the tenth control valve 227, which is remote from the fourth communication port 220d, is connected to a connection line between the first connection point and the outdoor heat exchanger 105. The fifth communication port 220e communicates with a seventh throttle 228, the seventh throttle 228 communicates with an eleventh control valve 229, and an end of the eleventh control valve 229 remote from the seventh throttle 228 is connected to a connection line between the fourth control valve 210 and the intake port of the compressor 101.

In this embodiment, the manner of controlling the storage container 220 to enter the closed state, the refrigerant storage state, and the refrigerant release state is also different from the embodiment shown in fig. 1. The method specifically comprises the following steps:

when the storage container 220 is in the closed state, both the tenth control valve 227 and the eleventh control valve 229 are closed;

when the storage container 220 is in a state of storing the refrigerant, both the tenth control valve 227 and the eleventh control valve 229 are opened;

when the accumulator 220 is in a refrigerant-released state, the tenth control valve 227 is closed, and the eleventh control valve 229 is opened.

In this embodiment, when the air conditioning system is in each operating mode, except that the control manners of the tenth control valve 227, the seventh throttling element 228 and the eleventh control valve 229 are different from the embodiment shown in fig. 1, the control manners of the other control valves and throttling elements are the same as the embodiment shown in fig. 1, and are not described again here.

The utility model provides an air conditioning system embodiment still has the mode of changing frost, under this mode:

the four-way valve 104 is powered off, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface; the fourth control valve 210 is opened, and the first control valve 207, the third control valve 208 and the second control valve 211 are all closed; the first throttling element 206 is in an open state and the opening size is adjustable, the second throttling element 209 is in a closed state, and the third throttling element 106 is in an open state and the opening size is adjustable; wherein the indoor heat exchanger 301 is turned off, the outdoor heat exchanger 105 functions as a condenser, and the accumulator 201 functions as an evaporator.

The refrigerant discharged from the compressor 101 passes through the outdoor heat exchanger 105 and is condensed, and then enters the accumulator 201 through the liquid-side header pipe 3 and the first throttle 206, and after being evaporated, the refrigerant returns to the suction side of the compressor 101 through the fourth control valve 210, the second gas pipe 203, and the gas-liquid separator 110. The refrigerant evaporates in the accumulator 201 without flowing through the indoor unit, and the stored heat is used to defrost the outdoor heat exchanger 105.

In the defrosting mode, if there is heat in the storage container 220, the sixth control valve 222 and the seventh control valve 223 may be opened, so that the refrigerant in the storage container 220 enters the gas-liquid separator 110 through the opened seventh control valve 223 under the action of high pressure, thereby releasing the refrigerant. If there is no heat in the storage container 220, the storage container 220 may be closed.

When the electricity price is low, the energy storage equipment 2 is used for storing energy; when the electricity price is in a peak, the energy storage equipment 2 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, the running cost is reduced, the peak clipping and valley filling of the electric power are realized, and the running cost of the air conditioner is reduced.

When defrosting is performed by the energy storage device 2, the evaporation load of the system can be borne, and compared with a reverse cycle defrosting scheme adopted by a non-energy-storage air conditioner, heat does not need to be absorbed from the indoor space, so that the indoor comfort is kept. 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.

The user can generally determine from the real-time electricity rates and power consumption: when the electricity price is at the peak value or the refrigeration requirement of the air conditioner is large, the low energy consumption requirement and the ultra-low energy consumption requirement can be set according to the actual situation.

When the air conditioning system only has refrigeration requirements, the pipeline is switched to a 'conventional refrigeration' mode, and the energy accumulator 201 is not used; when detecting that the system only has a cold accumulation requirement, switching to a 'complete cold accumulation' mode without using an indoor unit; when the system is detected to have cold accumulation requirements and refrigeration requirements at the same time, the system is switched to a refrigeration and cold accumulation simultaneous mode, and the flow of the refrigerant distributed to the energy accumulator 201 is adjusted through the opening degree of the first throttling element 206; when the system has low energy consumption and high condensation refrigeration requirements and the energy accumulator 201 stores cold energy, the system is switched to a parallel cold release mode, and in the mode, the stored cold energy is utilized to supercool the refrigerant, so that extra cold energy is provided, and the purpose of reducing energy consumption can be realized; when the system has low energy consumption and low condensation capacity refrigeration requirements and the energy accumulator 201 stores cold energy, the system is switched to a 'supercooling cold releasing' mode, and in the mode, the stored cold energy is utilized to supercool the refrigerant, so that extra cold energy is provided, and the purpose of reducing energy consumption can be realized; when the system has the requirement of ultra-low energy consumption for cooling and refrigeration and the energy accumulator 201 stores cold, the system is switched to a 'condensing and cooling' mode, the energy accumulator 201 serves as a condenser, and an indoor unit serves as an evaporator to achieve refrigeration circulation.

When the air conditioning system only has heating requirements, switching the pipeline to a 'conventional heating' mode; when the system only needs heat storage, the system is switched to a 'complete heat storage' mode; when the system has the requirement of heating and heat storage, switching to a heating and heat storage mode; when the system has low energy consumption heat release and heating requirements and heat is stored in the energy accumulator 201, the system is switched to a 'mixed heat release' mode, and at the moment, the energy accumulator 201 and the outdoor heat exchanger 105 are simultaneously used as evaporators, so that the suction pressure of the compressor 101 is improved, the discharge capacity of the compressor 101 and the refrigerating capacity of the system are improved, the running frequency of the compressor 101 is reduced, and the purpose of reducing energy consumption is achieved; when the system has the requirement of heat release and heating with ultralow energy consumption and heat is stored in the energy accumulator 201, the mode is switched to the independent heat release mode, and at the moment, the energy accumulator 201 is used as an independent heat source and has higher heat exchange temperature, so that the heating capacity of the refrigerant can be greatly improved, and the energy consumption of the system is reduced; when the system is detected to have a defrosting requirement and heat is stored in the energy accumulator 201, the four-way valve is reversed and switched to a defrosting mode, and the heat stored in the energy accumulator 201 is released to provide heat for defrosting of the outdoor heat exchanger 105.

In the cooling mode, when there is a demand for a large reduction in power consumption in a short time, a condensing and cooling function may be used, that is, a refrigeration cycle may be performed by using an accumulator alone as a condenser without using an outdoor heat exchanger as the condenser. 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. Under the heating mode, the energy accumulator can be independently used as an evaporator to form a refrigeration cycle with the indoor heat exchanger, so that the energy consumption is reduced, and the efficiency is improved.

The utility model discloses air conditioning system embodiment can be under the situation of this 11 kinds of functions of conventional refrigeration, complete cold-storage, refrigeration cold-storage, supercooling cold release, condensation cold release, parallelly connected cold release, conventional heating, complete heat accumulation, heating heat accumulation, mixed heat release, independent heat release, realize the storage and the release of refrigerant through storage container, the user demand of the refrigerant volume under the different operational modes of being convenient for. The specific characteristics of the refrigerant storage and release are as follows:

when it is determined that the storage refrigerant needs to be started in the current operation mode, the fifth control valve 221 and the eighth control valve 224 are opened, and the sixth control valve 222 and the seventh control valve 223 are closed. The eighth control valve 224 is opened to make the pressure of the storage container 220a low pressure body, and the fifth control valve 221 is opened to make the refrigerant inlet pipe of the storage container 220a middle pressure section, and the refrigerant enters the storage container 220 under the action of pressure difference.

When it is determined that the current operation mode requires the refrigerant tank to be activated to discharge the refrigerant, the fifth control valve 221 and the eighth control valve 224 are closed, and the sixth control valve 222 and the seventh control valve 223 are opened. The seventh control valve 223 is opened to make the outlet end of the storage container 220 in a low pressure state, the sixth control valve 222 is opened to make the pressure of the storage container 220 in a high pressure state, and the refrigerant in the storage container 220 is discharged out of the storage container 220 under the action of gravity and pressure difference and enters the pipeline circulation.

By storing and releasing the refrigerant of the storage container, the problem of poor heat exchange caused by inconsistent refrigerant requirements of a combined system of the energy storage equipment, an air conditioner outdoor unit and an indoor unit in different operation modes can be solved.

The volume of the storage container 220 can be set according to the difference between the maximum required circulation volume and the minimum required circulation volume of the system, and the adjustment of different required refrigerant volumes is realized through liquid inlet and liquid outlet control.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the utility model discloses a do not deviate from under the prerequisite of the principle, still can be right the utility model discloses a specific embodiment modifies or carries out the equivalent replacement to some technical features, and these are modified and should be covered with the equivalent replacement in the middle of the technical scheme scope of the utility model.

Claims

1. An air conditioning system, comprising:

a compressor (101);

an outdoor heat exchanger (105);

an indoor heat exchanger (301);

a storage vessel (220) in fluid communication with the compressor (101), the outdoor heat exchanger (105) and the indoor heat exchanger (301); and

the valve assembly is connected with the compressor (101), the outdoor heat exchanger (105), the indoor heat exchanger (301) and the storage container (220), the valve assembly is configured to control the flow direction of a refrigerant and/or the on-off of a connecting pipeline so as to adjust the state of the storage container (220) and realize the switching of the air conditioning system among different working modes, and the state of the storage container (220) comprises a closing state, a refrigerant storage state and a refrigerant releasing state.

2. The air conditioning system as claimed in claim 1, further comprising an accumulator (201), wherein a first end of the accumulator (201) is respectively communicated with the exhaust ports of the outdoor heat exchanger (105) and the compressor (101), a second end of the accumulator (201) is respectively communicated with the intake ports of the indoor heat exchanger (301) and the compressor (101), and the valve assembly is connected with the accumulator (201) to adjust the state of the accumulator (201), wherein the state of the accumulator (201) comprises a non-working state, a cold accumulation state, a cold release state, a heat accumulation state and a heat release state.

3. Air conditioning system according to claim 2, characterized in that the valve assembly comprises a first control valve (207) and a first throttle (206), the first control valve (207) and the first throttle (206) being connected in parallel between the first end of the accumulator (201) and the outdoor heat exchanger (105).

4. Air conditioning system according to claim 3, wherein the valve assembly comprises a second control valve (211), the second control valve (211) being arranged on a connection line between the indoor heat exchanger (301) and a first connection point on a line connecting the outdoor heat exchanger (105) with the first control valve (207) and the first throttle (206).

5. Air conditioning system according to claim 2, wherein the valve assembly comprises a third control valve (208), the third control valve (208) being arranged on a connection line between the first end of the accumulator (201) and the discharge of the compressor (101).

6. Air conditioning system according to claim 2, wherein the valve assembly comprises a fourth control valve (210), the fourth control valve (210) being arranged on a connection line between the second end of the accumulator (201) and the inlet of the compressor (101).

7. Air conditioning system according to claim 2, wherein the valve assembly comprises a second throttle member (209), the first end of the second throttle member (209) communicating with the second end of the accumulator (201), the second end of the second throttle member (209) communicating with the indoor heat exchanger (301) and the outdoor heat exchanger (105), respectively.

8. Air conditioning system according to claim 1, wherein the valve assembly comprises a third throttle member (106), the third throttle member (106) being arranged on the connection line between the outdoor heat exchanger (105) and the indoor heat exchanger (301).

9. The air conditioning system of claim 1, wherein the valve assembly comprises a four-way valve (104), the four-way valve (104) comprising a first port in communication with a discharge port of the compressor (101), a second port in communication with the outdoor heat exchanger (105), a third port in communication with an intake port of the compressor (101), and a fourth port in communication with the indoor heat exchanger (301).

10. The air conditioning system of claim 1, further comprising a subcooler (109) disposed between the outdoor heat exchanger (105) and the indoor heat exchanger (301), and the subcooler (109) is in communication with an air intake of the compressor (101).

11. Air conditioning system according to any of claims 2 to 7, characterized in that the valve assembly comprises a fifth control valve (221), a sixth control valve (222), a seventh control valve (223) and an eighth control valve (224), the fifth control valve (221) being connected between a first connection line and the third communication port (220 a) of the storage vessel (220), the first connection line being a line through which the outdoor heat exchanger (105) communicates with the indoor heat exchanger (301) and the accumulator (201), respectively, the sixth control valve (222) being connected between a connection line between the discharge port of the compressor (101) and the first end of the accumulator (201) and the second communication port (220 b) of the storage vessel (220), the seventh control valve (223) being connected between a connection line between the second end of the accumulator (201) and the inlet port of the compressor (101) and the first connection (220 c) of the storage vessel (220), the eighth control valve (224) being connected between the connection line between the second end of the accumulator (101) and the inlet port of the storage vessel (220).

12. The air conditioning system according to claim 11, wherein the valve assembly further comprises a fourth throttle member (225) and a fifth throttle member (226), the fourth throttle member (225) being connected between the seventh control valve (223) and the first communication port (220 c) of the storage container (220), the fifth throttle member (226) being connected between the eighth control valve (224) and the second communication port (220 b) of the storage container (220).

13. The air conditioning system as claimed in any one of claims 2 to 7, wherein the valve assembly includes a tenth control valve (227), a seventh throttle (228), and an eleventh control valve (229), the tenth control valve (227) being connected between a first connection line and a fourth communication port (220 d) of the storage container (220), the first connection line being a line through which the outdoor heat exchanger (105) communicates with the indoor heat exchanger (301) and the accumulator (201), respectively, the eleventh control valve (229) being connected between a connection line between the second end of the accumulator (201) and the air inlet of the compressor (101) and a fifth communication port (220 e) of the storage container (220), the seventh throttle (228) being connected between the eleventh control valve (229) and the fifth communication port (220 e) of the storage container (220).

14. Air conditioning system according to claim 2, wherein the valve assembly comprises a first control valve (207), a second control valve (211), a third control valve (208), a fourth control valve (210), a first throttle (206), a second throttle (209), a third throttle (106) and a four-way valve (104), the first control valve (207) and the first throttle (206) being connected in parallel between a first end of the accumulator (201) and a first connection point communicating with the outdoor heat exchanger (105), the second control valve (211) being arranged on a connection line between the first connection point and the indoor heat exchanger (301), the third control valve (208) being arranged on a connection line between the first end of the accumulator (201) and an exhaust port of the compressor (101), the fourth control valve (210) being arranged on a connection line between a second end of the accumulator (201) and an intake port of the compressor (101), the second throttle (209) being arranged on a connection line between the second end of the accumulator (201) and the intake port of the compressor (101), the second throttle (209) being arranged on a connection line between the first end of the accumulator (201) and the second connection point of the outdoor heat exchanger (105), the third control valve (106) being arranged on a connection line between the second connection point and the outdoor heat exchanger (105) and the connection point of the outdoor heat exchanger (301), the four-way valve (104) comprises a first interface, a second interface, a third interface and a fourth interface, the first interface is communicated with an exhaust port of the compressor (101), the second interface is communicated with the outdoor heat exchanger (105), the third interface is communicated with an air inlet of the compressor (101), and the fourth interface is communicated with the indoor heat exchanger (301).