CN107036331A - Air conditioning system and method for controlling heating of oil sump of compressor of air conditioning system - Google Patents
Air conditioning system and method for controlling heating of oil sump of compressor of air conditioning system Download PDFInfo
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- CN107036331A CN107036331A CN201510414961.1A CN201510414961A CN107036331A CN 107036331 A CN107036331 A CN 107036331A CN 201510414961 A CN201510414961 A CN 201510414961A CN 107036331 A CN107036331 A CN 107036331A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 137
- 238000004378 air conditioning Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003921 oil Substances 0.000 claims description 105
- 239000010687 lubricating oil Substances 0.000 claims description 22
- 230000004044 response Effects 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 claims description 4
- 230000009711 regulatory function Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 16
- 238000012986 modification Methods 0.000 description 16
- 230000037452 priming Effects 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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Abstract
The invention discloses an air conditioning system and a method for controlling heating of an oil sump of a compressor of the air conditioning system. In one embodiment, the condition that the power input line of the air conditioning system is connected with the power supply and the heating starting temperature difference condition is met serves as a trigger condition for heating the oil pool of the air conditioning system. In one embodiment, the condition that the power input line and the power supply of the air conditioning system are connected, the control unit receives the starting signal and meets the heating starting temperature difference condition is used as a trigger condition for heating the oil pool of the air conditioning system. The beneficial technical effects of the invention are as follows: the electric energy is saved and the safety of the compressor of the air conditioning system is ensured.
Description
Technical field
The present invention relates to the oil sump of air-conditioning system technical field, more particularly to heating air-conditioning system.
Background technology
As shown in fig. 1, air-conditioning system 110 include power input line 111, control unit 112 with
And compressor 113, wherein power input line 111 and power supply 120 connect.Power supply can be utility grid
Network.Compressor 113 includes stator 1131 and oil sump 1132.There is lubricating oil in oil sump 1132.It is empty
Refrigerant in the pipeloop of adjusting system 110 is circulating through compressor 113.If compressor 113
For the part that temperature in air-conditioning system 110 is minimum, then refrigerant tends to the shape at compressor 113
Into liquid refrigerant.When liquid refrigerant is deposited in lubricating oil, meeting dilute lubricating oil causes compression
When machine starts to rotate, because the bearing lubrication of compressor is not good and impaired.
The content of the invention
The present invention provides air-conditioning system and controls the side of the heating of the oil sump of the compressor of air-conditioning system
Method.The method have the benefit that：Save electric energy and ensure the compressor peace of air-conditioning system
Quan Xing.
In one embodiment, air-conditioning system includes：Compressor, it, which has, accommodates lubricating oil
Oil sump；Power input line；And control unit, control unit be configured to according to and compression
The related temperature Tor and outdoor environment temperature Ta of the temperature of lubricating oil in the oil sump of machine it
Between difference heating starting temperature difference condition is met to control the heating to oil sump, to meet compressor work
Make condition, wherein, control unit is configured in response to power input line and power supply
Connect and heat oil sump.
In one embodiment, air-conditioning system, including：Compressor, it, which has to accommodate, lubricates
The oil sump of oil；Power input line；And control unit, control unit be configured to according to and pressure
The related temperature Tor and outdoor environment temperature Ta of the temperature of lubricating oil in the oil sump of contracting machine
Between difference heating starting temperature difference condition is met to control the heating to oil sump, to meet compressor
Condition of work, wherein, control unit is configured in response to power input line and power supply
Connection and control unit receive starting-up signal and heat oil sump.
In one embodiment, the method for the heating of the oil sump of the compressor of control air-conditioning system
Including：Profit in the oil sump that the control unit of air-conditioning system determines with the compressor of air-conditioning system
Difference between the related temperature Tor and outdoor environment temperature Ta of the temperature of lubricating oil meets heating
When starting temperature difference condition, heated in response to the connection of the power input line and power supply of air-conditioning system
Oil sump.
In one embodiment, the method for the heating of the oil sump of the compressor of control air-conditioning system
Including：Profit in the oil sump that the control unit of air-conditioning system determines with the compressor of air-conditioning system
Difference between the related temperature Tor and outdoor environment temperature Ta of the temperature of lubricating oil meets heating
When starting temperature difference condition, in response to the connection and control of the power input line and power supply of air-conditioning system
Unit processed receives starting-up signal and heats oil sump.
In the present invention, the power input line of air-conditioning system is connected with power supply makes whole air-conditioner set
Occur from the state change down to energization.
In the present invention, starting-up signal refers to the signal for indicating temp regulating function in priming chamber.
It should be understood that term " comprising " refers to feature, one integral piece, step or component when being used herein
In the presence of, but it is not precluded from the presence or attached of one or more further features, one integral piece, step or component
Plus.
With reference to explanation hereinafter and accompanying drawing, only certain exemplary embodiments of this invention is disclose in detail, is specified
The principle of the present invention can be in adopted mode.It should be understood that embodiments of the present invention are in scope
Therefore it is not restricted.Within the scope of the appended claims, embodiments of the present invention include
Many changes, modifications and equivalent.
The feature for describing and/or showing for a kind of embodiment can be existed in same or similar mode
Used in one or more other embodiments, it is combined with feature in other embodiment, or
Substitute the feature in other embodiment.
Brief description of the drawings
Referring to the drawings, embodiment of the present invention is illustrated below, this will be helpful to be more readily understood that this
The above and other objects, features and advantages of invention.Unit need not be drawn out according to ratio in the accompanying drawings
Size and relative position.In the accompanying drawings：
Fig. 1 is the block diagram of the structure of air-conditioning system；
Fig. 2 is the oil sump of the compressor of the control air-conditioning system according to an embodiment of the invention
Heating method flow chart；And
Fig. 3 is the oil of the compressor of control air-conditioning system according to another implementation of the invention
The flow chart of the method for the heating in pond.
Embodiment
Illustrate embodiments of the present invention with reference to the accompanying drawings.It should be noted that the invention is not restricted to
Embodiments described herein.Such embodiment is described herein to be for illustration purposes only.
Based on the other embodiment of the teaching being contained herein to the skill in one or more association areas
It will be apparent for art personnel.It should be noted that for clarity, omitting in the accompanying drawings and the description
On well known to a person skilled in the art but with these incoherent parts of the present invention and processing mode
Expression and description.
<Embodiment one and its modification>
The control logic of control unit 112 of air-conditioning system 110 in Fig. 1 is improved there is provided
The method and the sky using this method of a kind of heating of the oil sump of the compressor of control air-conditioning system
Adjusting system.Specifically the method for heating oil sump 1132 is controlled to be improved control unit 112.
In embodiment one and its modification, it is connected using power line input line with power supply, receives start letter
Number and meet heating starting temperature difference condition as heating oil sump trigger condition.That is, control unit quilt
It is configured to according to the temperature Tor related to the temperature of the lubricating oil in the oil sump of compressor and outdoor
Difference between environment temperature Ta meets heating starting temperature difference condition to control the heating to oil sump, with full
Sufficient compressor operating condition, wherein, control unit be configured in response to power input line with
The connection of power supply and control unit receives starting-up signal and heats oil sump.
As shown in fig. 1, air-conditioning system 110 include power input line 111, control unit 112 with
And compressor 113, wherein power input line 111 and power supply 120 connect.Power supply can be utility grid
Network.Compressor 113 includes stator 1131 and oil sump 1132.There is lubricating oil in oil sump 1132.It is empty
Refrigerant in the pipeloop of adjusting system 110 is circulating through compressor 113.Implement in this implementation
And its in the technical scheme of modification, control unit 112 has improved control logic.
Heat a kind of flow of illustrative methods 200 of oil sump 1132 as shown in Figure 2.In step
At 201, the power input line of air-conditioning system is connected with power supply.At step 203, judge whether to receive
To starting-up signal, if judged result is no, continue to monitor whether to receive starting-up signal, if judging knot
Fruit is yes, then performs step 205.At step 205, the lubrication in the oil sump with compressor is judged
Whether the difference between the related temperature Tor and outdoor environment temperature Ta of the temperature of oil, which meets heating, is opened
Dynamic temperature difference condition, if the determination result is YES, then performs step 207, if judged result is no, holds
Row step 213.At step 207, oil sump is begun to warm up.The stator or pressure of compressor can be used
Oil sump is heated as heater in heating tape outside the housing of contracting machine., it is necessary to sentence during oil sump is heated
It is disconnected whether to meet stopping heating condition.At step 209, judge whether to meet stopping heating condition,
If the determination result is YES, then step 211 is performed, if judged result is no, step 215 is performed.
At step 211, stop heating oil sump.At step 213, temp regulating function in priming chamber.
At step 215, continuation heating instructions are sent, and return to step 209.
Starting-up signal can be inputted by terminal user by remote control or control panel etc..
Related temperature Tor can be：The temperature of the housing of compressor, the temperature of the fluid in oil sump,
At least 2 in temperature, the motor temperature of compressor or the aforementioned temperature of the discharge gas of air-conditioning system
The temperature represented by combination planted.
Heating starting temperature difference condition can be：Tor-Ta is less than Tthon, wherein, Tthon is heating
Start temperature difference threshold；Heating starting temperature difference condition can also be：Tor-Ta is not more than Tthon.
When heating oil sump, heating power is preferably greater than 100W heating power, such as 100W, 300W
Or 500W.
Stopping heating condition can be：Tor-Ta is more than Tthoff, wherein, Tthoff stops for heating
Temperature difference threshold.Stopping heating condition can also be：Tor-Ta is not less than Tthoff.Stop heating condition
Can also be：The total time for heating oil sump is more than heat time threshold value.Tthon and Tthoff can not
It is equal.
During oil sump is heated, in order to ensure that the temperature and/or the temperature of compressor of final lubricating oil can
Control, is such as no more than predetermined temperature, can adjust the power of heating, for example, in the heating at heating initial stage
Heating power of the power higher than heating latter stage.Heating power can be adjusted according to Tor-Ta, for example,
When Tor-Ta is close to Tthoff, reduces heating power, for example, be reduced to 40W.Heat the oil sump phase
Between, heating power can be adjusted according to Tor, when Tor is more than or equal to the first temperature threshold of compressor
During value, the power of adjustment heating oil sump；When Tor is more than or equal to the second temperature threshold value of compressor,
Stop heating oil sump.Heating power is adjusted, can prevent that the temperature of the motor of compressor is too high and damages
Bad inner member, is also beneficial to extend the service life of compressor inner member.
Aforesaid operations can be realized by control unit.As control unit is configured as：Work as control unit
Receive after the indication signal that power line is connected with power supply, control unit starts to monitor whether to receive start letter
Number, when not receiving starting-up signal, control unit can be monitored whether to receive and held with certain rule circulation
Machine signal, after control unit receives starting-up signal, control unit can judge whether Tor-Tr meets
Heating starting temperature difference condition, if being unsatisfactory for heating starting temperature difference condition, control unit can send priming chamber
The instruction of interior temp regulating function, if meeting heating starting temperature difference condition, control unit can send beginning
The instruction of oil sump is heated, during oil sump is heated, control unit, which can monitor whether to meet, stops fire-bar
Part, if it is not satisfied, then send the instruction for continuing to heat and continue to monitor whether to meet to stop heating condition,
If meeting, the instruction for stopping heating oil sump, and temp regulating function in priming chamber are sent.
Certainly in above-mentioned control logic, appropriate adjustment or modification can also be made according to actual needs.
Such as during oil sump is heated, it can also monitor whether to receive off signal, if receiving off signal,
Control unit sends the instruction for stopping heating oil sump, and sends the instruction for returning to step 203.
Embodiment one and its advantageous effects of modification include：(1) by before compressor is started
Heat oil sump to suppress the lubricating oil that liquefied refrigerant is mixed into compressor, it is ensured that the safety of compressor
Property；(2) heating power is adjustable, can prevent overheat of compressor, it is ensured that the security of compressor,
Also the service life of compressor is extended, heating power is adjustable to also improve the standard that lubricating oil temperature is controlled
Exactness；(3) heat, heated using stator relative to using external heating tape, it is only necessary to modification control
Logic, the increase of no hardware, has saved cost；(4) it is connected relative in power input line with power supply
In the case of compressor shutdown be maintained for heat oil sump scheme, electric energy can be saved.
<Embodiment two and its modification>
The control logic of control unit 112 of air-conditioning system 110 in Fig. 1 is improved there is provided
The method of the heating of the oil sump of the compressor of another control air-conditioning system and using this method
Air-conditioning system.Specifically the method for heating oil sump 1132 is controlled to change control unit 112
Enter.In embodiment two and its modification, be connected using power line input line with power supply and meet plus
Thermal starting temperature difference condition is used as the trigger condition for heating oil sump.That is, control unit be configured to according to
The related temperature Tor and outdoor environment temperature Ta of the temperature of lubricating oil in the oil sump of compressor it
Between difference heating starting temperature difference condition is met to control the heating to oil sump, to meet compressor operating bar
Part, wherein, control unit is configured to the connection in response to power input line and power supply and added
Deep fat pond.
Heat a kind of flow of illustrative methods 300 of oil sump 1132 as shown in Figure 3.In step
At 301, the power input line of air-conditioning system is connected with power supply.At step 303, judge and compression
Between the related temperature Tor and outdoor environment temperature Ta of the temperature of lubricating oil in the oil sump of machine
Whether difference meets heating starting temperature difference condition, if the determination result is YES, then step 305 is performed, if sentencing
Disconnected result is no, then performs step 311.At step 305, oil sump is begun to warm up.It can use
Oil sump is heated as heater in heating tape outside the stator of compressor or the housing of compressor.In heating
Stop heating condition, it is necessary to judge whether to meet during oil sump.At step 307, judge whether full
Foot stops heating condition, if the determination result is YES, then performs step 309, if judged result is no,
Then perform step 315.At step 309, stop heating oil sump.At step 311, judgement is
It is no to receive starting-up signal, if judged result is no, step 303 is returned to, if judged result is
It is then to perform step 313.At step 313, temp regulating function in priming chamber.In step 315
Place, sends continuation heating instructions, and return to step 315.
Starting-up signal can be inputted by terminal user by remote control or control panel etc..
Related temperature Tor can be：The temperature of the housing of compressor, the temperature of the fluid in oil sump,
At least 2 in temperature, the motor temperature of compressor or the aforementioned temperature of the discharge gas of air-conditioning system
The temperature represented by combination planted.
Heating starting temperature difference condition can be：Tor-Ta is less than Tthon, wherein, Tthon is heating
Start temperature difference threshold；Heating starting temperature difference condition can also be：Tor-Ta is not more than Tthon.
When heating oil sump, heating power is preferably greater than 100W heating power, such as 300W or
500W。
Stopping heating condition can be：Tor-Ta is more than Tthoff, wherein, Tthoff stops for heating
Temperature difference threshold.Stopping heating condition can also be：Tor-Ta is not less than Tthoff.Stop heating condition
Can also be：The total time for heating oil sump is more than heat time threshold value.Tthon and Tthoff can not
It is equal.
During oil sump is heated, in order to ensure that the temperature and/or the temperature of compressor of final lubricating oil can
Control, is such as no more than predetermined temperature, can adjust the power of heating, for example, in the heating at heating initial stage
Heating power of the power higher than heating latter stage.Heating power can be adjusted according to Tor-Ta, for example,
When Tor-Ta is close to Tthoff, reduces heating power, for example, be reduced to 40W.Heat the oil sump phase
Between, heating power can be adjusted according to Tor, when Tor is more than or equal to the first temperature threshold of compressor
During value, the power of adjustment heating oil sump；When Tor is more than or equal to the second temperature threshold value of compressor,
Stop heating oil sump.Heating power is adjusted, can prevent that the temperature of the motor of compressor is too high and damages
Bad inner member, is also beneficial to extend the service life of compressor inner member.
Aforesaid operations can be realized by control unit.As control unit is configured as：Work as control unit
Receive after the indication signal that power line is connected with power supply, control unit can judge whether Tor-Tr meets
Heating starting temperature difference condition, if being unsatisfactory for heating starting temperature difference condition, control unit, which can send monitoring, is
No to receive the instruction of starting-up signal, if meeting heating starting temperature difference condition, control unit, which can be sent, to be added
The instruction in deep fat pond, during oil sump is heated, control unit, which can monitor whether to meet, stops heating condition,
If it is not satisfied, then send the instruction for continuing to heat and continue whether meet stopping heating condition, if meeting,
The instruction for stopping heating oil sump is then sent, and control unit starts to monitor whether to receive starting-up signal,
When not receiving starting-up signal, control unit, which can be returned to, judges whether Tor-Tr meets heating and open
The step of dynamic temperature difference condition, temperature adjustment work(after control unit receives starting-up signal and in priming chamber
Energy.
Certainly in above-mentioned control logic, appropriate adjustment or modification can also be made according to actual needs.
Such as during oil sump is heated, it can also monitor whether to receive starting-up signal, if receiving starting-up signal,
Control unit is by workflow setting into the temp regulating function in priming chamber after heating oil sump is stopped.Such as
During oil sump is heated, it can also monitor whether to receive off signal, if receiving off signal, control
Unit processed by workflow setting into：Continue to heat, and stop after heating oil sump, perform step
303。
Embodiment two and its advantageous effects of modification include：(1) by before compressor is started
Heat oil sump to suppress the lubricating oil that liquefied refrigerant is mixed into compressor, it is ensured that the safety of compressor
Property；(2) heating power is adjustable, can prevent overheat of compressor, it is ensured that the security of compressor,
Also the service life of compressor is extended, heating power is adjustable to also improve the standard that lubricating oil temperature is controlled
Exactness；(3) heat, heated using stator relative to using external heating tape, it is only necessary to modification control
Logic, the increase of no hardware, has saved cost；(4) it is connected relative in power input line with power supply
In the case of compressor shutdown be maintained for heat oil sump scheme, electric energy can be saved；(5) relative to
Embodiment one and its modification, embodiment two and its modification are after the power-off of air-conditioning system complete machine is powered again
Judge whether to need at once to heat oil sump, so as to shorten temp regulating function in priming chamber when
Between.
Above in association with specific embodiment, invention has been described, but people in the art
Member will be apparent to the skilled artisan that these descriptions are all exemplary, be not the limit to the scope of the present invention
System.Those skilled in the art can make various according to spirit and principles of the present invention to the present invention
Variants and modifications, these variants and modifications are also within the scope of the invention.
Claims (21)
1. a kind of air-conditioning system, including：
Compressor, it has the oil sump for accommodating lubricating oil；
Power input line；And
Control unit, described control unit is configured to basis and the lubrication in the oil sump of the compressor
Difference between the related temperature Tor and outdoor environment temperature Ta of the temperature of oil meets heating starting temperature
Poor condition controls the heating to the oil sump, to meet compressor operating condition,
Wherein, described control unit is configured in response to the power input line and power supply
Connect and heat the oil sump.
2. a kind of air-conditioning system, including：
Compressor, it has the oil sump for accommodating lubricating oil；
Power input line；And
Control unit, described control unit is configured to basis and the lubrication in the oil sump of the compressor
Difference between the related temperature Tor and outdoor environment temperature Ta of the temperature of oil meets heating starting temperature
Poor condition controls the heating to the oil sump, to meet compressor operating condition,
Wherein, described control unit is configured in response to the power input line and power supply
Connect and described control unit receives starting-up signal and heats the oil sump.
3. air-conditioning system according to claim 1 or 2, wherein, the heating starting temperature difference
Condition is：The difference is less than Tthon, wherein, Tthon is heating starting temperature difference threshold.
4. air-conditioning system according to claim 1 or 2, wherein, the heating starting temperature difference
Condition is：The difference is not more than Tthon, wherein, Tthon is heating starting temperature difference threshold.
5. air-conditioning system according to claim 1 or 2, wherein, the related temperature Tor
For：The temperature of the housing of the compressor, temperature, the air-conditioning system of fluid in the oil sump
Discharge gas temperature, the motor temperature of the compressor or aforementioned temperature in it is at least two kinds of
The represented temperature of combination.
6. air-conditioning system according to claim 1 or 2, wherein, use the compressor
The oil sump is heated as heater in heating tape outside the housing of stator or the compressor.
7. a kind of method of the heating of the oil sump of the compressor of control air-conditioning system, including：
When the control unit of the air-conditioning system is determined in the oil sump with the compressor of the air-conditioning system
Lubricating oil temperature related temperature Tor and outdoor environment temperature Ta between difference meet heating
When starting temperature difference condition, heated in response to the connection of the power input line and power supply of the air-conditioning system
The oil sump.
8. a kind of method of the heating of the oil sump of the compressor of control air-conditioning system, including：
When the control unit of the air-conditioning system is determined in the oil sump with the compressor of the air-conditioning system
Lubricating oil temperature related temperature Tor and outdoor environment temperature Ta between difference meet heating
When starting temperature difference condition, connection and institute in response to the power input line and power supply of the air-conditioning system
Control unit is stated to receive starting-up signal and heat the oil sump.
9. the method according to claim 7 or 8, wherein, the heating starting temperature difference condition
For：The difference is less than Tthon, wherein, Tthon is heating starting temperature difference threshold.
10. the method according to claim 7 or 8, wherein, the heating starting temperature difference condition
For：The difference is not more than Tthon, wherein, Tthon is heating starting temperature difference threshold.
11. the method according to claim 7 or 8, wherein, during being heated to the oil sump,
After described control unit determines that the difference meets heating stop condition, stop the heating oil sump.
12. method according to claim 11, wherein, described control unit receives start
After signal, only after the heating oil sump is stopped, just starting the indoor temperature of the air-conditioning system
Regulatory function.
13. method according to claim 11, wherein, the heating stop condition is：Institute
State difference and be more than Tthoff, wherein, Tthoff stops temperature difference threshold for heating.
14. method according to claim 11, wherein, the heating stop condition is：Institute
State difference and be not less than Tthoff, wherein, Tthoff stops temperature difference threshold for heating.
15. method according to claim 11, wherein, the heating stop condition is：Plus
The total time of the heat oil sump is more than heat time threshold value.
16. the method according to claim 7 or 8, wherein, the power for heating the oil sump is big
In 300W.
17. the method according to claim 7 or 8, wherein, the related temperature Tor is：
The temperature of the housing of the compressor, the temperature of fluid in the oil sump, the row of the air-conditioning system
At least two kinds of combinations gone out in temperature, the motor temperature of the compressor or the aforementioned temperature of gas
Represented temperature.
18. the method according to claim 7 or 8, wherein, adjusted during the oil sump is heated
The power of whole heating.
19. the method described in claim 18, wherein, the work(of the heating is adjusted according to the difference
Rate.
20. the method according to claim 7 or 8, wherein, during the oil sump is heated,
When the related temperature Tor is more than or equal to the first temperature threshold of the compressor, adjustment adds
The power of the heat oil sump, when Tor is more than or equal to the second temperature threshold value of the compressor, stops
Only heat the oil sump.
21. the method according to claim 7 or 8, wherein, use the stator of the compressor
Or the heating tape outside the housing of the compressor heats the oil sump as heater.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109140720A (en) * | 2018-07-25 | 2019-01-04 | 南京天加环境科技有限公司 | A kind of control method of multi-connected machine crankshaft heating band |
| CN109612023A (en) * | 2018-12-12 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of compressor heating tape control method and air conditioner |
| CN112682929A (en) * | 2021-01-20 | 2021-04-20 | 青岛海信日立空调系统有限公司 | Air conditioner |
| CN113531803A (en) * | 2021-06-22 | 2021-10-22 | 青岛海尔空调器有限总公司 | Method and device for preheating heat insulation cotton of air conditioner, air conditioner and air conditioning system |
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Application publication date: 20170811 |