CN114263978A - Indoor unit, air conditioning unit and control method thereof - Google Patents
Indoor unit, air conditioning unit and control method thereof Download PDFInfo
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- CN114263978A CN114263978A CN202210027018.5A CN202210027018A CN114263978A CN 114263978 A CN114263978 A CN 114263978A CN 202210027018 A CN202210027018 A CN 202210027018A CN 114263978 A CN114263978 A CN 114263978A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000010257 thawing Methods 0.000 claims abstract description 142
- 238000010438 heat treatment Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 abstract description 9
- 238000007664 blowing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 238000005057 refrigeration Methods 0.000 description 1
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Abstract
The invention discloses an indoor unit, an air conditioning unit and a control method thereof, wherein the indoor unit comprises: indoor fan, air supply outlet, return air inlet; the defrosting bypass air pipe is connected with the air supply outlet at the first end and the air return inlet at the second end and used for guiding the air outlet of the air supply outlet into the air return inlet in a defrosting mode; wherein, indoor fan keeps the on-state when changing the white mode. The invention solves the problems of low defrosting efficiency caused by the fact that an indoor fan is closed when the air conditioner defrosts in the prior art, and improves defrosting efficiency and defrosting effect.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an indoor unit, an air conditioning unit and a control method of the indoor unit and the air conditioning unit.
Background
The problem of frosting of an outdoor heat exchanger is generally encountered in the air-cooled heat pump direct air supply unit during heating in winter. When the surface temperature of the outdoor heat exchanger is lower than the dew point temperature of air, frosting begins, the heat transfer efficiency of the outdoor heat exchanger is reduced along with the thickening of a frost layer, the heating capacity of the unit is also greatly reduced, the using effect is influenced, and at the moment, the unit needs to enter a defrosting mode to operate to defrost.
The currently applied mainstream defrosting technology adopts a four-way reversing valve to reverse and circulate to defrost. The unit is changed from a heating state to a cooling state to run by reversing through the four-way valve, the functions of the outdoor heat exchanger and the indoor heat exchanger are interchanged, and therefore the purpose of defrosting is achieved.
When the air supply fan stops running, forced convection between air and the fins is avoided, and the heat exchange efficiency is extremely low. Energy conservation is followed, the heat of defrosting of the outdoor heat exchanger basically comes from the compressor, the efficiency is extremely low, the defrosting time is long, and even defrosting is incomplete.
Aiming at the problems of low defrosting efficiency caused by the fact that an indoor fan is closed during defrosting in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides an indoor unit, an air conditioning unit and a control method thereof, which at least solve the problems of low defrosting efficiency caused by the fact that an indoor fan is closed when an air conditioner defrosts in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an indoor unit including:
indoor fan, air supply outlet, return air inlet;
the defrosting bypass air pipe is connected with the air supply outlet at the first end and the air return inlet at the second end and used for guiding the air outlet of the air supply outlet into the air return inlet in a defrosting mode; wherein, indoor fan keeps the on-state when changing the white mode.
Further, still include: the defrosting air valve is positioned on the defrosting bypass air pipe and used for controlling the on-off of the defrosting bypass air pipe; wherein, under the mode of defrosting, the blast gate that defrosts switches on.
Further, still include: one end of the air supply duct is connected with the air supply outlet, and the other end of the air supply duct is connected with an indoor air inlet; one end of the return air pipe is connected with the indoor air outlet, and the other end of the return air pipe is connected with the return air inlet; the second end of the defrosting bypass air pipe is also connected with the indoor air outlet; the air supply air valve is positioned on the air supply air pipe and used for controlling the on-off of the air supply air pipe; wherein, under the defrosting mode, the blast air valve is closed.
Further, the defrosting bypass air pipe is located on the outer side of the indoor unit shell.
Further, still include: an indoor heat exchanger; and the air supply temperature sensor is positioned at the air supply outlet and used for detecting the air supply temperature.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit including: an outdoor unit, such as the indoor unit described above.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit, including:
detecting whether the air conditioning unit meets defrosting entry conditions or not;
when the air conditioning unit meets defrosting entry conditions, controlling the operation mode of the air conditioning unit and the operation of an indoor unit;
otherwise, the current running state of the air conditioning unit is maintained.
Further, controlling the operation mode of the air conditioning unit and the operation of the indoor unit comprises: controlling the air conditioning unit to enter a defrosting mode, and controlling a defrosting air valve of the indoor unit to be opened and an air supply air valve of the indoor unit to be closed; maintaining a current operating state of the air conditioning unit, comprising: and controlling the air supply air valve to maintain an open state, and controlling the defrosting air valve to maintain a closed state.
Further, after controlling the operation mode of the air conditioning unit and the operation of the indoor unit, the method further comprises the following steps: detecting whether the air conditioning unit meets a defrosting exit condition or not; when the air conditioning unit meets the defrosting exit condition, controlling the air conditioning unit to exit the defrosting mode and enter the heating mode; and detecting the air supply temperature of the indoor unit, and controlling the operation of the indoor unit according to the air supply temperature.
Further, the operation of the indoor unit is controlled according to the supply air temperature, and the method comprises the following steps: judging whether the air supply temperature is greater than or equal to a preset air supply temperature or not; if the air supply temperature is greater than or equal to the preset air supply temperature, the defrosting air valve is controlled to be closed, and the air supply air valve is controlled to be opened; otherwise, the defrosting air valve is controlled to be kept in an open state, and the air supply air valve is controlled to be kept in a closed state.
In the invention, an air conditioning scheme for effectively improving defrosting efficiency is provided, a defrosting bypass air pipe is arranged between an indoor air supply outlet and an indoor air return inlet, and an indoor fan keeps a starting state in a defrosting mode and guides outlet air of the air supply outlet into the indoor air return inlet. The air conditioning unit does not have the air heat exchange of the indoor heat exchanger during defrosting, but has the air flow, so that the heat exchange efficiency is improved, fins of the outdoor heat exchanger obtain more heat to defrost, the defrosting effect is improved, and the defrosting is cleaner.
Drawings
Fig. 1 is an alternative structure diagram of an indoor unit according to an embodiment of the present invention;
FIG. 2 is an alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention;
fig. 3 is another alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an indoor unit of an air conditioning unit is provided, and specifically, fig. 1 shows an alternative structural schematic diagram of the indoor unit, and as shown in fig. 1, the indoor unit includes:
an indoor fan 1, an air supply outlet 2 and an air return inlet 3; the air supply outlet and the air return inlet refer to an air supply outlet and an air return inlet of an indoor unit;
a defrosting bypass air pipe 4, a first end of which is connected with the air supply outlet 2 and a second end of which is connected with the air return opening 3, and which is used for guiding the air outlet of the air supply outlet 2 into the air return opening 3 in a defrosting mode; wherein, indoor fan 1 keeps the on-state when changing the white mode. And the second end of the defrosting bypass air pipe 4 is also connected with the indoor air outlet.
In the above embodiment, an air conditioning scheme for effectively improving defrosting efficiency is provided, wherein a defrosting bypass air pipe is arranged between an indoor air supply outlet and an air return inlet, and when in a defrosting mode, an indoor fan keeps a starting state and guides outlet air of the air supply outlet into the air return inlet. The air conditioning unit does not have the air heat exchange of the indoor heat exchanger during defrosting, but has the air flow, so that the heat exchange efficiency is improved, fins of the outdoor heat exchanger obtain more heat to defrost, the defrosting effect is improved, and the defrosting is cleaner.
Except promoting the white efficiency of changing, the aforesaid sets up the low-pressure that can also promote the white in-process compressor that changes, has improved the running load of compressor machine in the white operating mode of changing, reduces the fault rate of compressor, promotes the reliability of complete machine.
As shown in fig. 1, a defrosting air valve 5 is further arranged on the defrosting bypass air pipe 4 and used for controlling the on-off of the defrosting bypass air pipe 4; wherein, in the defrosting mode, the defrosting air valve 5 is conducted. When the defrosting air valve 5 is switched on, the outlet air of the air supply outlet 2 is guided into the air return inlet 3, so that the air conditioning unit does not have air heat exchange of the indoor heat exchanger 9 during defrosting but has air flowing through, and the heat exchange efficiency is improved. According to the measurement and calculation, through the arrangement, the defrosting time can be shortened by 50%, the heating operation time of the compressor of the unit is prolonged, the heating quantity in winter is improved, and the comfort of users is improved.
An air inlet and an air outlet are arranged in the room. This air conditioning unit still includes: one end of the air supply duct 6 is connected with the air supply outlet 2, and the other end is connected with an indoor air inlet; one end of the return air pipe 7 is connected with an indoor air outlet, and the other end of the return air pipe is connected with the return air inlet 3; the air supply air valve 8 is positioned on the air supply air pipe 6 and used for controlling the on-off of the air supply air pipe 6; wherein, in the defrosting mode, the air supply air valve 8 is closed. In the defrosting mode, the air supply air valve 8 is closed, namely the air supply mode during heating is closed, the defrosting air valve 5 is switched on, and the defrosting bypass air pipe 4 guides the outlet air of the air supply outlet 2 into the air return inlet 3. The cold wind of indoor heat exchanger 9 can not insufflate indoor, and indoor heat exchanger 9 has wind forced convection circulation simultaneously, promotes heat exchange efficiency, and the defrosting heat that obtains of outdoor heat exchanger compares greatly increased when stopping supplying air and defrosting, and the defrosting is with higher speed. And because the indoor heat exchanger 9 has forced convection circulation of wind, the suction pressure of the compressor is greatly increased when the air supply is stopped for defrosting in the defrosting process of the compressor. The suction pressure is an important parameter influencing the reliability of the compressor, and the higher suction pressure greatly improves the defrosting operation condition of the compressor, has higher reliability and longer service life of the whole compressor.
Preferably, the defrosting bypass air duct 4 is located outside the indoor unit, i.e. outside the casing of the indoor unit, and does not occupy the inner space of the indoor unit.
Further, a blowing air temperature sensor 10 is provided at the blowing port 2 for detecting the blowing air temperature. And after the air supply temperature is determined, controlling to enter defrosting or exit defrosting according to the air supply temperature.
Example 2
Based on the air conditioning control device provided in the above embodiment 1, there is also provided in a preferred embodiment 2 of the present invention an air conditioning unit including: an outdoor unit, such as the indoor unit described above.
In the above embodiment, an air conditioning scheme for effectively improving defrosting efficiency is provided, wherein a defrosting bypass air pipe is arranged between an indoor air supply outlet and an air return inlet, and when in a defrosting mode, an indoor fan keeps a starting state and guides outlet air of the air supply outlet into the air return inlet. The air conditioning unit does not have the air heat exchange of the indoor heat exchanger during defrosting, but has the air flow, so that the heat exchange efficiency is improved, fins of the outdoor heat exchanger obtain more heat to defrost, the defrosting effect is improved, and the defrosting is cleaner.
Example 3
In a preferred embodiment 3 of the present invention, there is provided an air conditioning unit control method applied to the air conditioning unit in the above embodiment 2. In particular, fig. 2 shows an alternative flow chart of the method, which, as shown in fig. 2, comprises the following steps S202-S206:
s202: detecting whether the air conditioning unit meets defrosting entry conditions or not;
s204: when the air conditioning unit meets defrosting entry conditions, controlling the operation mode of the air conditioning unit and the operation of an indoor unit;
s206: otherwise, the current running state of the air conditioning unit is maintained.
In the above embodiment, an air conditioning scheme for effectively improving defrosting efficiency is provided, wherein a defrosting bypass air pipe is arranged between an indoor air supply outlet and an air return inlet, and when in a defrosting mode, an indoor fan keeps a starting state and guides outlet air of the air supply outlet into the air return inlet. The air conditioning unit does not have the air heat exchange of the indoor heat exchanger during defrosting, but has the air flow, so that the heat exchange efficiency is improved, fins of the outdoor heat exchanger obtain more heat to defrost, the defrosting effect is improved, and the defrosting is cleaner.
Controlling the operation mode of the air conditioning unit and the operation of the indoor unit, comprising: controlling the air conditioning unit to enter a defrosting mode, and controlling a defrosting air valve of the indoor unit to be opened and an air supply air valve of the indoor unit to be closed; maintaining a current operating state of the air conditioning unit, comprising: and controlling the air supply air valve to maintain an open state, and controlling the defrosting air valve to maintain a closed state. In the defrosting mode, the air supply air valve is closed, namely the air supply mode during heating is closed, the defrosting air valve is switched on, and the defrosting bypass air pipe guides the air outlet of the air supply outlet into the air return inlet.
After controlling the operation mode of the air conditioning unit and the operation of the indoor unit, the method further comprises the following steps: detecting whether the air conditioning unit meets a defrosting exit condition or not; when the air conditioning unit meets the defrosting exit condition, controlling the air conditioning unit to exit the defrosting mode and enter the heating mode; and detecting the air supply temperature of the indoor unit, and controlling the operation of the indoor unit according to the air supply temperature. Controlling the operation of the indoor unit according to the temperature of the supplied air, comprising: judging whether the air supply temperature is greater than or equal to a preset air supply temperature or not; if the air supply temperature is greater than or equal to the preset air supply temperature, the defrosting air valve is controlled to be closed, and the air supply air valve is controlled to be opened; otherwise, the defrosting air valve is controlled to be kept in an open state, and the air supply air valve is controlled to be kept in a closed state.
After the defrosting finish condition is achieved, the electric control module of the air conditioner host switches the air conditioner host into a heating mode, only when the air supply temperature is detected to be higher than a preset threshold value (the air supply temperature is guaranteed to have a heating effect), a command is sent, meanwhile, the air supply air valve is opened, the defrosting air valve is closed, normal heating is recovered, and the comfort of a user is guaranteed.
In a preferred embodiment 2 of the present invention, another air conditioning unit control method is further provided, and specifically, fig. 3 shows an optional flowchart of the method, and as shown in fig. 3, the method includes the following steps S301 to S310:
s301: whether the air conditioner main machine reaches a defrosting condition or not; if yes, the step S303 is executed, otherwise, the step S302 is executed;
s302: the air supply air valve is kept open, and the defrosting air valve is kept closed;
s303: fully opening the defrosting air valve;
s304: synchronously switching to defrosting operation, and closing an air supply air valve; when an electric control module of the air conditioner host judges that the host needs to enter defrosting operation at present, the electric control module sends an action instruction to open a defrosting air valve, and after the defrosting air valve is opened in place, the air conditioner is immediately switched to a defrosting operation mode (refrigeration) and simultaneously closes an air supply air valve;
s305: whether the defrosting ending condition is met or not; if yes, go to step S307, otherwise, go to step S306;
s306: the air supply air valve is kept closed, and the defrosting air valve is kept open;
s307: the defrosting operation is quitted, and the heating mode operation is switched; after the defrosting ending condition is met, the electric control module of the air conditioner main machine switches the air conditioner main machine into a heating mode;
s308: whether T is equal to or greater than a preset value is met; if yes, go to step S310, otherwise, go to step S309; after the heating mode is switched to operate, the heating is not tense immediately, because the air outlet is possibly cooler. Only when the air supply temperature is detected to be greater than a preset threshold value (the air supply temperature is ensured to have a heating effect), an air supply air valve opening command and a defrosting air valve closing command are sent;
s309: the air supply air valve is kept closed, and the defrosting air valve is kept open;
s310: the air supply air valve is opened, and the defrosting air valve is closed; after that, the process returns to step S301. And an air supply air valve is opened, a defrosting air valve is closed, normal heating is recovered, and the comfort of a user is ensured.
According to the invention, a frost bypass air pipe (with an air valve) is introduced between the air supply pipe and the air return pipe of the air conditioner main machine, the air supply air valve is additionally arranged on the air supply air pipe, and meanwhile, the air supply temperature detection device is additionally arranged, so that the air conditioner unit does not have air (air) heat exchange defrosting of the indoor heat exchanger but has air (air) flowing during defrosting, the heat exchange efficiency is improved, fins of the outdoor heat exchanger obtain more heat to remove defrosting, and defrosting is cleaner and quicker.
Example 4
Based on the air conditioning unit control method provided in embodiment 1 above, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the above embodiment, an air conditioning scheme for effectively improving defrosting efficiency is provided, wherein a defrosting bypass air pipe is arranged between an indoor air supply outlet and an air return inlet, and when in a defrosting mode, an indoor fan keeps a starting state and guides outlet air of the air supply outlet into the air return inlet. The air conditioning unit does not have the air heat exchange of the indoor heat exchanger during defrosting, but has the air flow, so that the heat exchange efficiency is improved, fins of the outdoor heat exchanger obtain more heat to defrost, the defrosting effect is improved, and the defrosting is cleaner.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. An indoor unit, comprising:
an indoor fan (1), an air supply outlet (2) and an air return inlet (3);
a defrosting bypass air pipe (4), the first end of which is connected with the air supply outlet (2), and the second end of which is connected with the air return opening (3), and is used for guiding the outlet air of the air supply outlet (2) into the air return opening (3) in a defrosting mode; and the indoor fan (1) is kept in a starting state in the defrosting mode.
2. The indoor unit according to claim 1, further comprising:
the defrosting air valve (5) is positioned on the defrosting bypass air pipe (4) and used for controlling the on-off of the defrosting bypass air pipe (4); wherein, in the defrosting mode, the defrosting air valve (5) is conducted.
3. The indoor unit according to claim 1, further comprising:
one end of the air supply duct (6) is connected with the air supply outlet (2), and the other end of the air supply duct is connected with an indoor air inlet (11);
one end of the return air pipe (7) is connected with the indoor air outlet (12), and the other end of the return air pipe is connected with the return air inlet (3); the second end of the defrosting bypass air pipe (4) is also connected with the indoor air outlet (12);
the air supply air valve (8) is positioned on the air supply air pipe (6) and is used for controlling the on-off of the air supply air pipe (6); wherein, in the defrosting mode, the air supply air valve (8) is closed.
4. Indoor unit according to claim 1, characterized in that the defrost bypass air duct (4) is located outside the indoor unit casing.
5. The indoor unit according to claim 1, further comprising:
an indoor heat exchanger (9);
and the air supply temperature sensor (10) is positioned at the air supply outlet (2) and is used for detecting the air supply temperature.
6. An air conditioning assembly, comprising: outdoor unit, indoor unit according to any one of claims 1 to 5.
7. An air conditioning unit control method applied to the air conditioning unit as set forth in claim 6, characterized by comprising:
detecting whether the air conditioning unit meets defrosting entry conditions or not;
when the air conditioning unit meets the defrosting entry condition, controlling the operation mode of the air conditioning unit and the operation of an indoor unit;
otherwise, maintaining the current running state of the air conditioning unit.
8. The method of claim 7, wherein controlling the operating mode of the air conditioning unit and the operation of the indoor unit comprises: controlling the air conditioning unit to enter a defrosting mode, and controlling a defrosting air valve of the indoor unit to be opened and an air supply air valve of the indoor unit to be closed;
maintaining a current operating state of the air conditioning unit, including: and controlling the air supply air valve to maintain an opening state, and controlling the defrosting air valve to maintain a closing state.
9. The method of claim 8, further comprising, after controlling the operation mode of the air conditioning unit and the operation of the indoor unit:
detecting whether the air conditioning unit meets a defrosting exit condition or not;
when the air conditioning unit meets the defrosting exit condition, controlling the air conditioning unit to exit the defrosting mode and enter a heating mode;
and detecting the air supply temperature of the indoor unit, and controlling the operation of the indoor unit according to the air supply temperature.
10. The method of claim 9, wherein controlling operation of the indoor unit based on the supply air temperature comprises:
judging whether the air supply temperature is greater than or equal to a preset air supply temperature;
if the air supply temperature is greater than or equal to the preset air supply temperature, the defrosting air valve is controlled to be closed, and the air supply air valve is opened;
otherwise, controlling the defrosting air valve to maintain an opening state, and controlling the air supply air valve to maintain a closing state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210027018.5A CN114263978A (en) | 2022-01-11 | 2022-01-11 | Indoor unit, air conditioning unit and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210027018.5A CN114263978A (en) | 2022-01-11 | 2022-01-11 | Indoor unit, air conditioning unit and control method thereof |
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| CN101738054A (en) * | 2009-12-30 | 2010-06-16 | 天津大学 | Method for defrosting based on by-pass circulating defrosting structure of refrigerator |
| CN106403205A (en) * | 2016-11-29 | 2017-02-15 | 广东美的制冷设备有限公司 | Air-conditioner defrosting system and defrosting control method |
| CN106871341A (en) * | 2017-01-24 | 2017-06-20 | 青岛海尔空调器有限总公司 | Air-conditioner defrosting control method and device |
| CN110081559A (en) * | 2019-05-07 | 2019-08-02 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioner defrosting control method and air conditioner |
| CN111678206A (en) * | 2020-06-17 | 2020-09-18 | 珠海格力电器股份有限公司 | Air conditioning unit and control method thereof |
| CN217031367U (en) * | 2022-01-11 | 2022-07-22 | 珠海格力电器股份有限公司 | Indoor unit and air conditioning unit |
-
2022
- 2022-01-11 CN CN202210027018.5A patent/CN114263978A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000012499A (en) * | 1999-12-08 | 2000-03-06 | 이재환 | An air conditioning system |
| CN101738054A (en) * | 2009-12-30 | 2010-06-16 | 天津大学 | Method for defrosting based on by-pass circulating defrosting structure of refrigerator |
| CN106403205A (en) * | 2016-11-29 | 2017-02-15 | 广东美的制冷设备有限公司 | Air-conditioner defrosting system and defrosting control method |
| CN106871341A (en) * | 2017-01-24 | 2017-06-20 | 青岛海尔空调器有限总公司 | Air-conditioner defrosting control method and device |
| CN110081559A (en) * | 2019-05-07 | 2019-08-02 | 宁波奥克斯电气股份有限公司 | A kind of air-conditioner defrosting control method and air conditioner |
| CN111678206A (en) * | 2020-06-17 | 2020-09-18 | 珠海格力电器股份有限公司 | Air conditioning unit and control method thereof |
| CN217031367U (en) * | 2022-01-11 | 2022-07-22 | 珠海格力电器股份有限公司 | Indoor unit and air conditioning unit |
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