CN213841417U - Multi-split system - Google Patents
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- CN213841417U CN213841417U CN202022781162.7U CN202022781162U CN213841417U CN 213841417 U CN213841417 U CN 213841417U CN 202022781162 U CN202022781162 U CN 202022781162U CN 213841417 U CN213841417 U CN 213841417U
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Abstract
The application provides a multi-split system. The multi-split system comprises a compressor (1), an outdoor heat exchanger, a throttling device (5) and an indoor unit (6), wherein the outdoor heat exchanger comprises a micro-channel heat exchanger (3), the throttling device (5) is arranged on a pipeline between the micro-channel heat exchanger (3) and the indoor unit (6), a liquid storage tank (4) is arranged on the pipeline between the throttling device (5) and the micro-channel heat exchanger (3), the liquid storage tank (4) is connected with a first liquid pipe (8), a second liquid pipe (9) and a first air pipe (10), the first air pipe (10) is connected to an air suction port of the compressor (1), the first liquid pipe (8) is connected to the throttling device (5), and the second liquid pipe (9) is connected to the micro-channel heat exchanger (3). According to the multi-split system, the refrigerant distribution uniformity of the micro-channel heat exchanger can be improved, and the heat exchange efficiency of the heat exchanger is improved.
Description
Technical Field
The application relates to the technical field of air conditioning, in particular to a multi-split system.
Background
Compared with the common copper tube finned tube heat exchanger, the micro-channel heat exchanger has higher heat exchange coefficient and lower relative cost, is the best substitute for replacing a finned copper tube, and is widely applied to the fields of household air conditioners and water heaters. With the continuous popularization and upgrading of the aluminum microchannel heat exchanger technology, the microchannel heat exchanger begins to be used in the field of multi-split air conditioners and the like, and the operating power of the multi-split air conditioner is generally more than 5, so that the heat exchanger is required to be large in area, the number and the length of the total flat tubes of the microchannels are increased, a flow path of the microchannel heat exchanger is often formed by connecting and converging a plurality of flat tubes in parallel, and the uneven distribution phenomenon among the flat tubes can exist in the flow path.
In the heating operation process, the liquid refrigerant exists in a gas-liquid two-phase state after being throttled by the electronic expansion valve, so that the liquid refrigerant is influenced by gravity when reaching the inlet of a certain flow flat pipe, the gaseous refrigerant can move upwards, the liquid refrigerant can move downwards, the amount of the liquid refrigerant distributed by the upper flat pipe and the lower flat pipe is inconsistent, the flow distribution is uneven, and the temperature distribution of the heat exchanger is uneven, so that the heat exchange efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem that this application will be solved lies in providing a multi-split system, can improve microchannel heat exchanger's refrigerant distribution homogeneity, improves heat exchange efficiency of heat exchanger.
In order to solve the problem, the application provides a multi-split system, including the compressor, outdoor heat exchanger, throttling arrangement and indoor set, outdoor heat exchanger includes the microchannel heat exchanger, throttling arrangement is located the pipeline between microchannel heat exchanger and the indoor set, be provided with the liquid storage pot on the pipeline between throttling arrangement and the microchannel heat exchanger, the liquid storage pot is connected with first liquid pipe, second liquid pipe and first trachea, first trachea is connected to the induction port of compressor, first liquid union coupling is to throttling arrangement, the second liquid union coupling is to the microchannel heat exchanger.
Preferably, the first liquid pipe is provided with a first control valve, and the first gas pipe is provided with a second control valve.
Preferably, the liquid storage tank is further connected with a second air pipe, the second air pipe is connected to an exhaust port of the compressor, and a third control valve is arranged on the second air pipe.
Preferably, a bypass pipeline is further arranged between the throttling device and the micro-channel heat exchanger, the bypass pipeline is connected with the liquid storage tank in parallel, and a fourth control valve is arranged on the bypass pipeline.
Preferably, the fourth control valve is a one-way valve for controlling one-way communication of the fluid from the microchannel heat exchanger to the throttling device.
Preferably, the multi-split system further comprises a gas-liquid separator, the gas-liquid separator is arranged at the air suction end of the compressor, and the first gas pipe is connected to the gas-liquid separator.
Preferably, the multi-split system further comprises a four-way valve, and the four-way valve is connected with the compressor, the indoor unit and the outdoor heat exchanger.
Preferably, the first control valve, the second control valve and the third control valve are solenoid valves.
Preferably, the pipe orifice of the first air pipe is positioned at the top of the liquid storage tank, and the pipe orifices of the first liquid pipe and the second liquid pipe are positioned at the bottom of the liquid storage tank.
The utility model provides a many online systems, including compressor, outdoor heat exchanger, throttling arrangement and indoor set, outdoor heat exchanger includes the microchannel heat exchanger, throttling arrangement is located the pipeline between microchannel heat exchanger and the indoor set, be provided with the liquid storage pot on the pipeline between throttling arrangement and the microchannel heat exchanger, the liquid storage pot is connected with first liquid pipe, second liquid pipe and first trachea, first trachea is connected to the induction port of compressor, first liquid union coupling is to throttling arrangement, the second liquid union coupling is to the microchannel heat exchanger. When the multi-split air conditioner system is in a heating mode, the refrigerant flowing out of the indoor unit is throttled by the throttling device and enters the liquid storage tank through the first liquid pipe, the gaseous refrigerant in the liquid storage tank can enter an air suction port of the compressor through the first gas pipe, the liquid refrigerant in the liquid storage tank enters the micro-channel heat exchanger through the second liquid pipe, and the liquid refrigerant entering the micro-channel heat exchanger through the second liquid pipe is the liquid refrigerant and has consistent inlet states, so that when the liquid refrigerant enters each flow path flat pipe of the micro-channel heat exchanger through the paging head, the phenomenon of uneven distribution among the flat pipes in the same flow path due to gas-liquid mixing does not occur, and the uniform flow distribution of the refrigerant among all changes in the same flow path can be ensured, the refrigerant distribution uniformity of the micro-channel heat exchanger is improved, the heat exchange efficiency of the micro-channel heat exchanger is improved, and the temperature uniformity among the flat pipes is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a multi-split system according to an embodiment of the present application;
fig. 2 is a schematic diagram illustrating a refrigerant flow when the multi-split system according to the embodiment of the present disclosure is in a heating cycle mode;
fig. 3 is a schematic diagram illustrating a flow of a refrigerant when the multi-split system according to the embodiment of the present disclosure is in a refrigeration cycle mode;
fig. 4 is a schematic diagram illustrating a refrigerant flow when the multi-split system according to the embodiment of the present disclosure is in a refrigeration cycle liquid storage mode;
fig. 5 is a schematic diagram illustrating a flow of a refrigerant when the multi-split system according to the embodiment of the present disclosure is in a refrigeration cycle drainage mode.
The reference numerals are represented as:
1. a compressor; 2. a four-way valve; 3. a microchannel heat exchanger; 4. a liquid storage tank; 4a, a first control valve; 4b, a second control valve; 4c, a third control valve; 4d, a fourth control valve; 5. a throttling device; 6. an indoor unit; 7. a gas-liquid separator; 8. a first liquid pipe; 9. a second liquid pipe; 10. a first air pipe; 11. a second air pipe; 12. a bypass line.
Detailed Description
Referring to fig. 1 to 5 in combination, according to an embodiment of the present disclosure, a multi-split system includes a compressor 1, an outdoor heat exchanger, a throttling device 5, and an indoor unit 6, the outdoor heat exchanger includes a micro-channel heat exchanger 3, the throttling device 5 is located on a pipeline between the micro-channel heat exchanger 3 and the indoor unit 6, a liquid storage tank 4 is disposed on the pipeline between the throttling device 5 and the micro-channel heat exchanger 3, the liquid storage tank 4 is connected with a first liquid pipe 8, a second liquid pipe 9, and a first gas pipe 10, the first gas pipe 10 is connected to a suction port of the compressor 1, the first liquid pipe 8 is connected to the throttling device 5, and the second liquid pipe 9 is connected to the micro-channel heat exchanger 3.
When the multi-split air conditioner system is in a heating mode, refrigerant flowing out of an indoor unit is throttled by the throttling device 5 and enters the liquid storage tank through the first liquid pipe 8, gaseous refrigerant in the liquid storage tank can enter an air suction port of the compressor 1 through the first air pipe 10, liquid refrigerant in the liquid storage tank enters the micro-channel heat exchanger through the second liquid pipe 9, and all the refrigerant entering the micro-channel heat exchanger through the second liquid pipe 9 is liquid refrigerant and all the inlet states of the micro-channel heat exchanger are consistent, so that when the liquid refrigerant enters all the flat pipe flow paths of the micro-channel heat exchanger through the paging head, the phenomenon of uneven flow distribution among the flat pipes in the same flow path due to gas-liquid mixing cannot occur, the flow distribution of the refrigerant among all the changes of the same flow path can be ensured to be uniform, the refrigerant distribution uniformity of the micro-channel heat exchanger is improved, the heat exchange efficiency of the micro-channel heat exchanger is improved, and the temperature uniformity among the flat tubes is ensured.
The first liquid pipe 8 is provided with a first control valve 4a, and the first gas pipe 10 is provided with a second control valve 4 b. Through set up the control valve respectively on first liquid pipe 8 and first trachea 10, can utilize the break-make of the respective place pipeline of control valve control, and then make liquid storage pot 4 present different operating condition through the break-make combination of these pipelines, satisfy different control demands to satisfy the operation demand of multi-online system better.
The liquid storage tank 4 is also connected with a second air pipe 11, the second air pipe 11 is connected to an exhaust port of the compressor 1, and a third control valve 4c is arranged on the second air pipe 11. The second air pipe 11 enables the liquid storage tank 4 to be selectively communicated with the exhaust port of the compressor 1, so that when liquid refrigerant in the liquid storage tank 4 needs to be discharged out of the liquid storage tank 4, the refrigerant in the liquid storage tank 4 can be discharged out by utilizing the pressure brought by the high-pressure refrigerant at the exhaust port of the compressor 1, and the excessive storage of the refrigerant in the liquid storage tank 4 is avoided, and the amount of the refrigerant participating in heat exchange circulation is increased. Under the normal working state of the multi-split air-conditioning system, the communication of the second air pipe 11 can be cut off, the direct influence of the high-pressure refrigerant at the exhaust port of the compressor 1 on the pressure in the liquid storage tank 4 is avoided, and the liquid storage tank 4 can normally participate in heat exchange circulation.
A bypass pipeline 12 is further arranged between the throttling device 5 and the micro-channel heat exchanger 3, the bypass pipeline 12 is connected with the liquid storage tank 4 in parallel, and a fourth control valve 4d is arranged on the bypass pipeline 12. The bypass pipeline 12 has the effects that the refrigerant can directly participate in the circulating heat exchange flow without passing through the liquid storage tank 4, the normal operation of the multi-split air conditioning system can be realized under the condition that the liquid storage tank 4 does not participate, the liquid storage function of the liquid storage tank 4 can be realized through the mutual cooperation of the fourth control valve 4d on the bypass pipeline 12 and the first control valve 4a, the second control valve 4b and the third control valve 4c, and the amount of the refrigerant participating in the heat exchange is reasonably adjusted.
Through controlling first control valve 4a, second control valve 4b, the operating condition of third control valve 4c and fourth control valve 4d, can make many online systems demonstrate different operational modes, thereby make liquid storage pot 4 can realize the gas-liquid separation function, refrigeration stock solution function and refrigeration flowing back function, not only can solve the problem that the heat exchange efficiency that the heating operation in-process shunts between 3 inside flat pipes of microchannel heat exchanger reduces that the inequality leads to, but also can solve the many online systems that adopt microchannel heat exchanger 3 and make cold operation in-process refrigerant best perfusion volume difference big, the refrigerant piles up appears in the refrigeration operation easily, heat exchange efficiency is low, the problem that the efficiency is low.
In one embodiment, the fourth control valve 4d is a one-way valve controlling one-way communication of fluid from the microchannel heat exchanger 3 to the throttling device 5. The one-way valve is adopted, the on-off of the bypass pipeline 12 can be automatically controlled according to the flowing state of the refrigerant, so that the one-way valve does not need to be controlled by a controller and the like, and the control program is simpler.
The multiple on-line system further comprises a gas-liquid separator 7, the gas-liquid separator 7 is arranged at the air suction end of the compressor 1, and the first gas pipe 10 is connected to the gas-liquid separator 7.
The multi-split system also comprises a four-way valve 2, and the four-way valve 2 is connected with the compressor 1, the indoor unit 6 and the outdoor heat exchanger. Specifically, a first port of the four-way valve 2 is connected to an exhaust port of the compressor 1, a second port is connected to the microchannel heat exchanger 3, a third port is connected to the indoor unit 6, and a fourth port is connected to a suction port of the compressor 1, so that the operation state of the multi-split system can be conveniently switched using the four-way valve 2.
In one embodiment, the first control valve 4a, the second control valve 4b, and the third control valve 4c are solenoid valves, and the fourth control valve 4d is also solenoid valves, so that the control valves can be controlled by a controller, linkage control is realized, and adjustment and control of the operating state of the multi-split air-conditioning system are facilitated.
The mouth of pipe of first trachea 10 is located the top of liquid storage pot 4, and the mouth of pipe of first liquid pipe 8 and second liquid pipe 9 is located the bottom of liquid storage pot 4 to guarantee the regional intercommunication of the gaseous state refrigerant of the mouth of pipe of first trachea 10 and liquid storage pot 4, first liquid pipe 8 and second liquid pipe 9 and the regional intercommunication of the liquid refrigerant of liquid storage pot 4, guarantee that the refrigerant that flows out to first trachea 10 from liquid storage pot 4 is gaseous state refrigerant, the refrigerant that flows out to first liquid pipe 8 or second liquid pipe 9 from liquid storage pot 4 is liquid refrigerant. The orifice of the second air pipe 11 is positioned at the top of the liquid storage tank 4.
The gas pipe is a gaseous refrigerant when the refrigerant enters the gas pipe from the liquid storage tank 4, and the liquid pipe is a liquid refrigerant when the refrigerant enters the liquid pipe from the liquid storage tank 4.
The above-mentioned throttle device 5 is, for example, an electronic expansion valve.
According to an embodiment of the present application, the control method of the multi-split system includes: acquiring an operation mode of the multi-split system; and controlling the operation state of the liquid storage tank 4 according to the operation mode of the multi-split system.
By adjusting the operation state of the liquid storage tank 4, the liquid storage tank 4 can realize multiple functions of gas-liquid separation, refrigeration liquid storage, refrigeration liquid drainage and the like, and further the operation requirement of the multi-split system is met. The adjustment of various operating states of the liquid storage tank 4 is realized by the state combination of the control valves, and different specific functions of the liquid storage tank 4 can be realized by controlling the control valves to be in different working states.
The operation mode of the multi-split system is one of the following modes: a heating circulation mode, a refrigeration circulation liquid storage mode and a refrigeration circulation liquid drainage mode.
The controlling the operation state of the liquid storage tank 4 according to the operation mode of the multi-split air conditioning system includes: when the multi-split air-conditioning system is in a heating circulation mode, controlling a first control valve 4a and a second control valve 4b to be opened, a third control valve 4c to be closed and a fourth control valve 4d to be closed; after flowing out of the throttling device 5, the control refrigerant enters the liquid storage tank 4 through the first liquid pipe 8, the gaseous refrigerant enters the air suction port of the compressor 1 through the first air pipe 10, and the liquid refrigerant enters the microchannel heat exchanger 3 through the second liquid pipe 9 for heat exchange.
In the heating cycle mode, low-temperature and low-pressure gaseous refrigerant enters an air suction port of the compressor 1 from an outlet of the gas-liquid separator 7, is compressed into high-temperature and high-pressure gaseous refrigerant by the compressor 1, enters the indoor unit 6 through the four-way valve 2 for throttling evaporation, is condensed into high-pressure and high-temperature liquid refrigerant, forms gas-liquid two-phase refrigerant after being throttled by the electronic expansion valve, is subjected to gas-liquid separation by the liquid storage tank 4, is evaporated by the microchannel heat exchanger 3 and then returns to the gas-liquid separator 7 to complete a heating cycle, and the gaseous refrigerant subjected to gas-liquid separation by the liquid storage tank 4 directly enters the gas-liquid separator 7 to complete a heating cycle.
The controlling the operation state of the liquid storage tank 4 according to the operation mode of the multi-split air conditioning system includes: when the multi-split system is in a refrigeration cycle mode, controlling the first control valve 4a, the second control valve 4b and the third control valve 4c to be closed, and controlling the fourth control valve 4d to be opened; after flowing out of the micro-channel heat exchanger 3, the control refrigerant enters the throttling device 5 through the bypass pipeline 12 for throttling and then enters the indoor unit 6 for heat exchange.
In the refrigeration cycle mode, low-temperature and low-pressure gaseous refrigerant enters an air suction port of the compressor 1 from an outlet of the gas-liquid separator 7, is compressed into high-temperature and high-pressure gaseous refrigerant through the compressor 1, enters the microchannel heat exchanger 3 through the four-way valve 2, is condensed into high-pressure and high-temperature liquid refrigerant, flows through the one-way valve, passes through the electronic expansion valve, returns to the gas-liquid separator 7 after being throttled and evaporated by the indoor unit 6, and completes a refrigeration cycle, wherein the liquid storage tank 4 does not participate in work in the process.
The controlling the operation state of the liquid storage tank 4 according to the operation mode of the multi-split air conditioning system includes: when the multi-split system is in a refrigeration cycle liquid storage mode, the first control valve 4a and the third control valve 4c are controlled to be closed, and the second control valve 4b and the fourth control valve 4d are controlled to be opened; after flowing out of the microchannel heat exchanger 3, the control refrigerant is divided into two parts, one part enters the throttling device 5 through the bypass pipeline 12 for throttling and then enters the indoor unit 6 for heat exchange, the other part enters the liquid storage tank 4 through the second liquid pipe 9, then the gaseous refrigerant in the liquid storage tank 4 enters the air suction port of the compressor 1 through the first air pipe 10, and the liquid refrigerant is stored in the liquid storage tank 4.
In a refrigeration cycle liquid storage mode, a low-temperature and low-pressure gaseous refrigerant enters an air suction port of a compressor 1 from an outlet of a gas-liquid separator 7, is compressed into a high-temperature and high-pressure gaseous refrigerant through the compressor 1, enters a microchannel heat exchanger 3 through a four-way valve 2, is condensed into a high-pressure and high-temperature liquid refrigerant, and is throttled by an electronic expansion valve after a part of the refrigerant passes through a one-way valve, is throttled and evaporated by an indoor unit 6, and then returns to the gas-liquid separator 7 to complete a refrigeration cycle; the other part of liquid refrigerant enters the liquid storage tank 4 through the liquid inlet of the liquid storage tank 4 to be stored because the liquid storage tank 4 is in a low-pressure state, so that the adjustment of the amount of the refrigerant participating in heat exchange in the multi-split system is realized.
In the process, the liquid storage tank 4 has the liquid storage function, and redundant liquid refrigerants are stored in the liquid storage tank 4 in the refrigeration operation, so that the refrigerant quantity participating in heat exchange circulation is matched with the required filling quantity of the multi-split system, and the operation energy efficiency of the multi-split system is effectively improved.
The controlling the operation state of the liquid storage tank 4 according to the operation mode of the multi-split air conditioning system includes: when the multi-split system is in a refrigeration cycle liquid drainage mode, controlling the first control valve 4a to be closed, and controlling the second control valve 4b, the third control valve 4c and the fourth control valve 4d to be opened; the control refrigerant is divided into two parts after flowing out from an exhaust port of the compressor 1, one part enters the microchannel heat exchanger 3 through the four-way valve 2 for heat exchange, then enters the throttling device 5 for throttling through the bypass pipeline 12, then enters the indoor unit 6 for heat exchange, the other part enters the liquid storage tank 4 through the second air pipe 11, so that the liquid refrigerant in the liquid storage tank 4 is discharged through the first liquid pipe 8, enters the throttling device 5 for throttling, then enters the indoor unit 6 for heat exchange, and is discharged from the liquid storage tank 4 to participate in refrigeration cycle.
In a refrigeration cycle liquid discharge mode, a low-temperature and low-pressure gaseous refrigerant enters an air suction port of a compressor 1 from an outlet of a gas-liquid separator 7, is compressed into a high-temperature and high-pressure gaseous refrigerant through the compressor 1, enters a microchannel heat exchanger 3 through a four-way valve 2, is condensed into a high-pressure and high-temperature liquid refrigerant, then passes through a one-way valve, is throttled by an electronic expansion valve, is throttled and evaporated by an indoor unit 6, and then returns to the gas-liquid separator 7 to complete a refrigeration cycle; because the first control valve 4a and the third control valve 4c are in an open state, the liquid refrigerant in the liquid storage tank 4 is discharged by the high pressure formed by the high-pressure refrigerant at the exhaust port of the compressor, enters the electronic expansion valve for throttling, and the liquid discharge control is completed.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (9)
1. The utility model provides a multi-split system, its characterized in that, includes compressor (1), outdoor heat exchanger, throttling arrangement (5) and indoor set (6), outdoor heat exchanger includes microchannel heat exchanger (3), throttling arrangement (5) are located microchannel heat exchanger (3) with on the pipeline between indoor set (6), throttling arrangement (5) with be provided with liquid storage pot (4) on the pipeline between microchannel heat exchanger (3), liquid storage pot (4) are connected with first liquid pipe (8), second liquid pipe (9) and first trachea (10), first trachea (10) are connected to the induction port of compressor (1), first liquid pipe (8) are connected to throttling arrangement (5), second liquid pipe (9) are connected to microchannel heat exchanger (3).
2. A multi-split system as claimed in claim 1, wherein a first control valve (4a) is provided on the first liquid pipe (8), and a second control valve (4b) is provided on the first gas pipe (10).
3. A multi-split system as claimed in claim 2, wherein the liquid storage tank (4) is further connected with a second air pipe (11), the second air pipe (11) is connected to an exhaust port of the compressor (1), and a third control valve (4c) is arranged on the second air pipe (11).
4. A multi-split system as claimed in claim 2 or 3, wherein a bypass pipeline (12) is further arranged between the throttling device (5) and the microchannel heat exchanger (3), the bypass pipeline (12) is connected with the liquid storage tank (4) in parallel, and a fourth control valve (4d) is arranged on the bypass pipeline (12).
5. A multi-split system as claimed in claim 4, wherein the fourth control valve (4d) is a one-way valve controlling one-way communication of fluid from the microchannel heat exchanger (3) to the throttling device (5).
6. A multi-split system as claimed in claim 2, further comprising a gas-liquid separator (7), wherein the gas-liquid separator (7) is arranged at the suction end of the compressor (1), and the first gas pipe (10) is connected to the gas-liquid separator (7).
7. A multi-split system as claimed in claim 2, further comprising a four-way valve (2), wherein the four-way valve (2) is connected with the compressor (1), the indoor unit (6) and the outdoor heat exchanger.
8. A multi-split system as claimed in claim 3, wherein the first control valve (4a), the second control valve (4b) and the third control valve (4c) are solenoid valves.
9. A multi-split system as claimed in claim 2, wherein the orifice of the first air pipe (10) is located at the top of the liquid storage tank (4), and the orifices of the first liquid pipe (8) and the second liquid pipe (9) are located at the bottom of the liquid storage tank (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022781162.7U CN213841417U (en) | 2020-11-26 | 2020-11-26 | Multi-split system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022781162.7U CN213841417U (en) | 2020-11-26 | 2020-11-26 | Multi-split system |
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| CN213841417U true CN213841417U (en) | 2021-07-30 |
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| CN202022781162.7U Active CN213841417U (en) | 2020-11-26 | 2020-11-26 | Multi-split system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361669A (en) * | 2020-11-26 | 2021-02-12 | 珠海格力电器股份有限公司 | Multi-split system and control method thereof |
| CN115264620A (en) * | 2022-07-19 | 2022-11-01 | 青岛海信日立空调系统有限公司 | Multi-split air conditioning system |
| CN115289553A (en) * | 2022-07-19 | 2022-11-04 | 青岛海信日立空调系统有限公司 | Multi-split air conditioning system |
-
2020
- 2020-11-26 CN CN202022781162.7U patent/CN213841417U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361669A (en) * | 2020-11-26 | 2021-02-12 | 珠海格力电器股份有限公司 | Multi-split system and control method thereof |
| CN112361669B (en) * | 2020-11-26 | 2023-07-28 | 珠海格力电器股份有限公司 | Multi-split system and control method thereof |
| CN115264620A (en) * | 2022-07-19 | 2022-11-01 | 青岛海信日立空调系统有限公司 | Multi-split air conditioning system |
| CN115289553A (en) * | 2022-07-19 | 2022-11-04 | 青岛海信日立空调系统有限公司 | Multi-split air conditioning system |
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