CN105972868B - Air-conditioning system, air conditioner system control method and air conditioner - Google Patents
Air-conditioning system, air conditioner system control method and air conditioner Download PDFInfo
- Publication number
- CN105972868B CN105972868B CN201610341994.2A CN201610341994A CN105972868B CN 105972868 B CN105972868 B CN 105972868B CN 201610341994 A CN201610341994 A CN 201610341994A CN 105972868 B CN105972868 B CN 105972868B
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- Prior art keywords
- oil return
- air
- oil
- conditioning system
- return line
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The present invention provides a kind of air-conditioning system, air conditioner system control method and air conditioner, air-conditioning system includes compressor；Oil return line, oil return line are connected with the oil revolving end of compressor；Pipeline is heated, at least part of heating pipeline is disposed adjacently with oil return line, and when introducing the refrigerant of preset temperature in heating pipeline, heating pipeline and oil return line carry out heat exchange to improve the returning-oil temperature of oil return line.The heating pipeline of heat exchange is carried out with oil return line by being arranged, refrigerant in air-conditioning system is introduced into heating pipeline, heat is provided to oil return line into the refrigerant in heating pipeline, so that returning-oil temperature is increased in oil return line, to reduce viscosity oily in oil return line, the oil return efficiency for increasing compressor, effectively extends the service life of compressor.
Description
Technical field
The present invention relates to air conditioner technical fields, in particular to a kind of air-conditioning system, air conditioner system control method
And air conditioner.
Background technique
The upper general scheme that an oil return capillary is utilized using a compressor of compressor oil return control in the prior art
To control oil return.The oil return capillary used cannot be too thick, although oil return ratio slightly can be promoted very much, will cause oil return performance drop
It is low.Oil return capillary can not be too thin, although unit performance can be promoted by attenuating, the oil return of oil return capillary can be made difficult,
Reliability reduces.One compressor using the circuit of a capillary in ultralow-temperature operation conditions (- 30 DEG C and less) operation,
Since the lubricating oil floccule in gs-oil separator increases, viscosity increases, this will lead to lubricating oil and passes through resistance when oil return capillary
Power increases, and then generates oil return difficulty, oil return deficiency, eventually leads to press oil starvation and makes compressor emergency shutdown, or even can be because of mill
Damage effectively causes compressor damage.
Summary of the invention
The main purpose of the present invention is to provide a kind of air-conditioning system, air conditioner system control method and air conditioners, to solve
The problem of compressor oil return difficulty in the prior art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of air-conditioning system, comprising: compressor；
Oil return line, oil return line are connected with the oil revolving end of compressor；Heat pipeline, at least part of heating pipeline and oil return line
It is disposed adjacently, when introducing the refrigerant of preset temperature in heating pipeline, heating pipeline carries out heat exchange with oil return line to improve
The returning-oil temperature of oil return line.
Further, air-conditioning system further include: gas exhaust piping, gas exhaust piping are connected with compressor, heat pipeline into
Mouth end and outlet end are connected with gas exhaust piping respectively.
Further, oil return line includes: oil return capillary tube segment, the first end of oil return capillary tube segment and the import of compressor
End is connected, and heating pipeline is disposed adjacently with oil return capillary tube segment.
Further, air-conditioning system further include: temperature detector is set on oil return capillary tube segment to monitor oil return hair
Returning-oil temperature in tubule section.
Further, air-conditioning system further includes gs-oil separator, and oil return line further includes the first oil return pipeline section, oil return capillary
The first end of pipeline section forms the first end of oil return line, the first end phase of the second end of oil return capillary tube segment and the first oil return pipeline section
Connection, the second end of the first oil return pipeline section are connected with the oil outlet of gs-oil separator, and the second end of the first oil return pipeline section is formed
The second end of oil return line, gas exhaust piping are connected with the air inlet of gs-oil separator.
Further, the caliber for heating pipeline is less than the caliber of gas exhaust piping.
Further, air-conditioning system further includes gs-oil separator, and gas exhaust piping includes: high pressure gas pipeline section, high pressure gas
One end of pipeline section is connected with the exhaust outlet of compressor, and the other end of high pressure gas pipeline section is connected with the air inlet of gs-oil separator
Logical, the inlet end and an outlet end for heating pipeline is connected with high pressure gas pipeline section respectively.
Further, air-conditioning system further include: temperature detector, temperature detector are arranged on oil return line.
Further, the coiling of heating pipeline is on oil return line.
Further, the heating pipeline of part is arranged in the inner cavity of oil return line or partial oil return line is worn
In the inner cavity of heating pipeline.
Further, heating tube road is provided with control valve.
Further, attemperator is provided on the adjacent heating pipeline and the oil return line.
According to another aspect of the present invention, a kind of air conditioner system control method is provided, for controlling air-conditioning system, air-conditioning
System is above-mentioned air-conditioning system, wherein method includes: that temperature detector is provided on oil return line, start-up temperature detector,
Detecting the returning-oil temperature in oil return line is T1；Returning-oil temperature T1 and preset temperature T2 are compared；If T1 < T2, is opened
It is set to the control valve of heating tube road.
Further, if T1 >=T2, control valve is closed.
Further, if T1 < T2, opening controlling valve, the time of opening controlling valve is at least 30 minutes.
In accordance with a further aspect of the present invention, a kind of air conditioner, including air-conditioning system are provided, air-conditioning system is above-mentioned sky
Adjusting system.
It applies the technical scheme of the present invention, which includes air-conditioning compressor, oil return line and heating pipeline.Oil return
Pipeline is connected with the oil revolving end of compressor.Pipeline is heated, at least part of heating pipeline is disposed adjacently with oil return line, adds
When introducing the refrigerant of preset temperature in pipe line, heating pipeline and oil return line carry out heat exchange to improve the oil return of oil return line
Temperature.Refrigerant in air-conditioning system is introduced into heating pipeline by the heating pipeline for carrying out heat exchange with oil return line by being arranged,
Heat is provided to oil return line into the refrigerant in heating pipeline, so that returning-oil temperature is increased in oil return line, to drop
Oily viscosity, increases the oil return efficiency of compressor, effectively extends the service life of compressor in low oil return line.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the embodiment of air-conditioning system according to the present invention.
Wherein, the above drawings include the following reference numerals:
10, compressor；20, oil return line；21, oil return capillary tube segment；22, the first oil return pipeline section；30, gas exhaust piping；31,
High pressure gas pipeline section；40, pipeline is heated；41, control valve；50, gs-oil separator；51, first exit end；52, second outlet end；
60, temperature detector；70, gas-liquid separator；80, heat exchanger.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a specific embodiment according to the present invention, provides a kind of air-conditioning system, which includes sky
Adjusting system compressor 10, oil return line 20 and heating pipeline 40.Oil return line 20 is connected with the oil revolving end of compressor 10.Heating
Pipeline 40, at least part of heating pipeline 40 are disposed adjacently with oil return line 20, introduce preset temperature in heating pipeline 40
When refrigerant, heating pipeline 40 and oil return line 20 carry out heat exchange to improve the returning-oil temperature of oil return line 20.
In the present embodiment, the heating pipeline 40 for carrying out heat exchange with oil return line 20 by being arranged, will be in air-conditioning system
The refrigerant with preset temperature be introduced into heating pipeline 40 in, into heating pipeline in refrigerant provide heat to oil return line 20
Amount, so that returning-oil temperature is increased in oil return line 20, i.e., the row of being incorporated to again after being heated by heat-conducting medium to oil return line 20
Air pipe 30 reduces viscosity oily in oil return line 20, increases the oil return efficiency of compressor 10, effectively extends compression
The service life of machine 10.Refrigerant as referred to herein with preset temperature refers to the refrigerant that temperature is greater than or equal to -30, can also be with
Refer to the refrigerant for enabling to the temperature of the oil in oil return line 20 to improve in the air-conditioning system, such as the high pressure in air-conditioning system
The refrigerant in refrigerant or middle pressure tracheae section in tracheae section.
Air-conditioning system further includes gas exhaust piping 30.Gas exhaust piping 30 is connected with compressor 10, heats the import of pipeline 40
End and outlet end are connected with gas exhaust piping 30 respectively.The refrigerant of high temperature and pressure is discharged compressor 10 from gas exhaust piping 30,
In the input end by heating pipeline 40, the refrigerant of part is entered in heating pipeline 40 by input end mentions heating pipeline 40
Heating load, the refrigerant into heating pipeline 40 are again introduced into gas exhaust piping 30 from the outlet end discharge of heating pipeline 40.
Wherein, oil return line 20 includes oil return capillary tube segment 21, first end and the compressor 10 of oil return capillary tube segment 21
Input end is connected, and heating pipeline 40 is disposed adjacently with oil return capillary tube segment 21.Using the High Temperature Gas being discharged from compressor 10
Body heats oil return capillary tube segment 21, reduces lubricating oil and generates floccule in low temperature environment and make oil return capillary tube segment
The speed that the oil viscosity of oil in 21 is got higher, reduces lubricating oil viscosity, so that lubricating oil smoothly returns in compressor.When
So, the form that oil return capillary tube segment 21 and heating pipeline 40 mutually coil can also be subjected to heat exchange.
As shown in Figure 1, air-conditioning system further includes temperature detector 60, it is set on oil return capillary tube segment 21 to monitor back
Returning-oil temperature in oily capillary tube segment 21.Wherein, temperature detector 60 can be temperature sensing package, be supervised in real time by temperature detector 60
The temperature of control detection oil return, guarantees that compressor 10 can be realized smoothly oil return.
It refer again to Fig. 1, air-conditioning system further includes the first oil return pipeline section 22, one end of the first oil return pipeline section 22 and oil return hair
The second end of tubule section 21 is connected, and the other end of the first oil return pipeline section 22 is connected with the first exit end 51 of gs-oil separator 50
Logical, the second outlet end 52 of gs-oil separator 50 is connected with heat exchanger 80 and gas-liquid separator 70 respectively.Wherein, temperature detection
Device 60 can also be set on the first oil return pipeline section 22, can also be set to oil return capillary tube segment 21 and the first oil return pipeline section simultaneously
On 22.In this way can by temperature detector 60 comprehensively monitoring returning-oil temperature variation, enable operating personnel timely
Corresponding safety measure is made to guarantee that compressor 10 normally operates.
The first oil return pipeline section 22 in oil return line 20, the first end of oil return capillary tube segment 21 form the of oil return line 20
One end, the second end of oil return capillary tube segment 21 are connected with the first end of the first oil return pipeline section 22, and the of the first oil return pipeline section 22
Two ends are connected with the oil outlet of gs-oil separator 50, and the second end of the first oil return pipeline section 22 forms the second of oil return line 20
End, gas exhaust piping 30 are connected with the air inlet of gs-oil separator 50.
It is please referred to shown in Fig. 1 again, gas exhaust piping 30 includes high pressure gas pipeline section 31.One end of high pressure gas pipeline section 31 and pressure
The exhaust outlet of contracting machine 10 is connected, and the other end of high pressure gas pipeline section 31 is connected with the air inlet of gs-oil separator 50, heating
The inlet end and an outlet end of pipeline 40 is connected with high pressure gas pipeline section 31 respectively.At least part of heating pipeline 40 and oil return pipe
Road 20 is disposed adjacently to improve the returning-oil temperature of oil return line 20.High temperature and high pressure gas can be firstly introduced by setting in this way adds
Heat is provided to oil return line 20 in pipe line 40, so that returning-oil temperature is increased in oil return line 20, that is, passes through thermally conductive Jie
Matter is incorporated to gas exhaust piping 30 after heating to oil return line 20 again, reduces viscosity oily in oil return line 20, increases compressor
10 oil return efficiency, effectively extends the service life of compressor 10.
For the efficient gas bring heat using in heating pipeline 40, the setting that pipeline 40 coils will be heated and existed
On oil return line 20, more effectively increase the heat exchanger effectiveness between heating pipeline 40 and oil return line 20 in this way.
Preferably, attemperator is provided on adjacent heating pipeline 40 and oil return line 20.Attemperator can be guarantor
Wen Mian is able to extend the high-temperature duration of oil return line 20 using heat-preservation cotton, further increases the oil return of compressor 10
Effect.
It certainly, can also be by part when guaranteeing that heating pipeline 40 and 20 junction of oil return line have enough leakproofness
Ground heating pipeline 40 is arranged in the inner cavity of oil return line 20, or partly oil return line 20 is arranged in heating pipeline 40
Heat exchange is carried out in inner cavity.
Preferably, the caliber for heating pipeline 40 is less than the caliber of gas exhaust piping 30.It is arranged in this way so that only need to be from exhaust pipe
The high pressure gas that fraction is introduced in road 30, which heats oil return line 20, can improve returning-oil temperature, and reaching reduces oil return wadding
The purpose of shape object, the amount i.e. oil return viscosity that setting can either reduce oil return floccule in this way can guarantee compressor 10 not because of setting again
Heating pipeline 40 and the overall compression performance for affecting compressor 10.
Preferably, it heats on pipeline 40 and is provided with control valve 41.Setting can be detected back by temperature detector 60 in this way
Oil temperature, the temperature by detecting oil return are made whether to open control valve 41 so that the high pressure gas pair being discharged out of compressor 10
Oil return line 20 is heated.
Air-conditioning system in above-described embodiment, control method are as follows:
Start the temperature detector 60 being set on oil return line 20, detecting the returning-oil temperature in oil return line 20 is T1.
Returning-oil temperature T1 is compared with preset temperature T2.If T1 < T2, the control valve 41 being set on heating pipeline 40 is opened.If
T1 >=T2 then closes control valve 41.
Returning-oil temperature is detected by oil return temperature sensing package, if it is this that returning-oil temperature, which is less than -30 DEG C, under unit open state
When T2=-30 DEG C, then opening controlling valve 41, so that the high temperature and high pressure gas of compressor separates a path and is passed into oil return capillary
Near section 21, and by heat-conducting medium, oil return capillary tube segment 21 is transferred heat to, and then increase returning-oil temperature, to subtract
Small lubricating oil generates floccule in low temperature environment and speed that oil viscosity is got higher, reduces lubricating oil viscosity, so that lubrication
It is oily smoothly to return to compressor.
In the present embodiment, if T1 >=-30 DEG C, close control valve 41, if < -30 DEG C of T1, opening controlling valve 41 is opened
The time for opening control valve 41 is at least 30 minutes.Setting can realize returning to oil return capillary tube segment 21 by control valve 41 in this way
Oil temperature is controlled, so that improving the controllability of the system.
Above-mentioned air-conditioning system may be also used in air conditioner setting technical field, i.e., according to another embodiment of the invention,
A kind of air conditioner, including air-conditioning system are improved, air-conditioning system is the air-conditioning system in above-described embodiment.
The air conditioner is mutually wound by the heating pipeline 40 for separating oil return capillary tube segment 21 and gas exhaust piping 30, is used in combination
Heat-preservation cotton package, when compressor 10 is run in ultra-low temperature surroundings, using the higher compressor air-discharging of temperature to oil return capillary
Pipeline section 21 is heated, so that oil is enable smoothly to return in compressor 10, it is this to add from compressor itself acquirement high temperature heat source
Hot returning-oil temperature effectively raises the reliability of air conditioner to promote oil temperature.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of air-conditioning system characterized by comprising
Compressor (10)；
Oil return line (20), the oil return line (20) are connected with the oil revolving end of the compressor (10)；
It heats pipeline (40), at least part of heating pipeline (40) is disposed adjacently with the oil return line (20), described
When heating the refrigerant for introducing preset temperature in pipeline (40), the heating pipeline (40) and the oil return line (20) carry out hot friendship
It changes to improve the returning-oil temperature of the oil return line (20)；
Gs-oil separator (50)；
Gas exhaust piping (30), the gas exhaust piping (30) are connected with the compressor (10), it is described heating pipeline (40) into
Mouth end and outlet end are connected with the gas exhaust piping (30) respectively, and the inlet end and an outlet end of heating pipeline (40) is located at
It is connected on the pipeline between the exhaust outlet of the compressor (10) and the air inlet of the gs-oil separator (50)；
The oil return line (20) includes:
The first end of oil return capillary tube segment (21), the oil return capillary tube segment (21) is connected with the input end of the compressor (10)
Logical, the heating pipeline (40) is disposed adjacently with the oil return capillary tube segment (21)；
Heating pipeline (40) coiling is on the oil return line (20).
2. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system further include:
Temperature detector (60) is set on the oil return capillary tube segment (21) to monitor in the oil return capillary tube segment (21)
Returning-oil temperature.
3. air-conditioning system according to claim 1, which is characterized in that the oil return line (20) further includes the first oil return pipe
Section (22), the first end of the oil return capillary tube segment (21) form the first end of the oil return line (20), the oil return capillary
The second end of pipeline section (21) is connected with the first end of the first oil return pipeline section (22), and the of the first oil return pipeline section (22)
Two ends are connected with the oil outlet of the gs-oil separator (50), and the second end of the first oil return pipeline section (22) forms described return
The second end of oil pipe line (20), the gas exhaust piping (30) are connected with the air inlet of the gs-oil separator (50).
4. air-conditioning system according to claim 1, which is characterized in that the caliber of heating pipeline (40) is less than the row
The caliber of air pipe (30).
5. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system further includes gs-oil separator
(50), the gas exhaust piping (30) includes:
One end of high pressure gas pipeline section (31), the high pressure gas pipeline section (31) is connected with the exhaust outlet of the compressor (10)
Logical, the other end of the high pressure gas pipeline section (31) is connected with the air inlet of the gs-oil separator (50), the heating tube
The inlet end and an outlet end on road (40) is connected with the high pressure gas pipeline section (31) respectively.
6. air-conditioning system according to claim 1, which is characterized in that the air-conditioning system further include:
Temperature detector (60), the temperature detector (60) are arranged on the oil return line (20).
7. air-conditioning system according to claim 1, which is characterized in that the heating pipeline (40) of part is arranged in described
In the inner cavity of oil return line (20) or the partial oil return line (20) is arranged in the inner cavity of heating pipeline (40)
In.
8. air-conditioning system according to claim 1, which is characterized in that be provided with control valve on the heating pipeline (40)
(41)。
9. air-conditioning system according to claim 1, which is characterized in that the adjacent heating pipeline (40) and the oil return
Pipeline is provided with attemperator on (20).
10. a kind of air conditioner system control method, for controlling air-conditioning system, which is characterized in that the air-conditioning system is wanted for right
Air-conditioning system described in asking any one of 1 to 9, wherein the described method includes:
Temperature detector (60) are provided on the oil return line (20), are started the temperature detector (60), oil return pipe is detected
Returning-oil temperature in road (20) is T1；
Returning-oil temperature T1 and preset temperature T2 are compared；
If T1 < T2, the control valve (41) being set on heating pipeline (40) is opened；
The time for opening the control valve (41) is at least 30 minutes.
11. air conditioner system control method according to claim 10, which is characterized in that if T1 >=T2, close the control
Valve (41) processed.
12. a kind of air conditioner, which is characterized in that including air-conditioning system, the air-conditioning system is any one of claims 1 to 9
The air-conditioning system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610341994.2A CN105972868B (en) | 2016-05-19 | 2016-05-19 | Air-conditioning system, air conditioner system control method and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610341994.2A CN105972868B (en) | 2016-05-19 | 2016-05-19 | Air-conditioning system, air conditioner system control method and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105972868A CN105972868A (en) | 2016-09-28 |
| CN105972868B true CN105972868B (en) | 2019-06-14 |
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ID=56955476
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610341994.2A Active CN105972868B (en) | 2016-05-19 | 2016-05-19 | Air-conditioning system, air conditioner system control method and air conditioner |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243062A (en) * | 2019-06-24 | 2019-09-17 | 广东志高暖通设备股份有限公司 | The heating means and air-conditioning press of air-conditioning press |
| CN114111090B (en) * | 2021-11-17 | 2022-11-25 | 珠海格力电器股份有限公司 | Frequency conversion device of air conditioning system, air conditioning system and control method of air conditioning system |
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| JPH10300246A (en) * | 1997-04-25 | 1998-11-13 | Mitsubishi Electric Corp | Refrigerating equipment |
| CN201917143U (en) * | 2010-12-30 | 2011-08-03 | 福建雪人股份有限公司 | Oil return heat exchange device |
| CN103032981A (en) * | 2011-09-30 | 2013-04-10 | 复盛股份有限公司 | Refrigerant compressor unit |
| CN204880905U (en) * | 2015-06-12 | 2015-12-16 | 珠海格力电器股份有限公司 | Oil separator subassembly and refrigerating system |
| CN205090686U (en) * | 2015-10-15 | 2016-03-16 | 珠海格力电器股份有限公司 | Oil return device |
| CN205783938U (en) * | 2016-05-19 | 2016-12-07 | 珠海格力电器股份有限公司 | Air conditioning system and there is its air-conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3498009B2 (en) * | 1999-06-02 | 2004-02-16 | 三菱電機ビルテクノサービス株式会社 | Refrigeration equipment |
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2016
- 2016-05-19 CN CN201610341994.2A patent/CN105972868B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10300246A (en) * | 1997-04-25 | 1998-11-13 | Mitsubishi Electric Corp | Refrigerating equipment |
| CN201917143U (en) * | 2010-12-30 | 2011-08-03 | 福建雪人股份有限公司 | Oil return heat exchange device |
| CN103032981A (en) * | 2011-09-30 | 2013-04-10 | 复盛股份有限公司 | Refrigerant compressor unit |
| CN204880905U (en) * | 2015-06-12 | 2015-12-16 | 珠海格力电器股份有限公司 | Oil separator subassembly and refrigerating system |
| CN205090686U (en) * | 2015-10-15 | 2016-03-16 | 珠海格力电器股份有限公司 | Oil return device |
| CN205783938U (en) * | 2016-05-19 | 2016-12-07 | 珠海格力电器股份有限公司 | Air conditioning system and there is its air-conditioner |
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| CN105972868A (en) | 2016-09-28 |
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