CN203068769U - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN203068769U CN203068769U CN 201220604687 CN201220604687U CN203068769U CN 203068769 U CN203068769 U CN 203068769U CN 201220604687 CN201220604687 CN 201220604687 CN 201220604687 U CN201220604687 U CN 201220604687U CN 203068769 U CN203068769 U CN 203068769U
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- valve
- heat exchanger
- conditioning system
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Abstract
The utility model discloses an air conditioning system which comprises an outdoor unit and one or a plurality of indoor units which are in parallel connection. The outdoor unit comprises a compressor, a gas-liquid separator, an oil separator, a four-way valve, an outdoor heat exchanger, an outdoor throttling element and a first stop valve. Each indoor unit comprises an indoor heat exchanger. The first stop valve is in parallel connection with the outdoor throttling element. The air conditioning system further comprises a thermal storage heat exchanger which is provided with a heat absorption heat exchange pipe, a heat release heat exchange pipe, a regulating valve and a second stop valve. The heat absorption heat exchange pipe is in series connection with the regulating valve to form a series connection pipeline, the series connection pipeline is in parallel connection with the indoor units, the heat release heat exchange pipe is in parallel connection with the second stop valve to form a parallel connection pipeline, and the parallel connection pipeline is in series connection on a pipeline between the gas-liquid separator and the four-way valve. According to the air conditioning system, the thermal storage heat exchanger is flexible in arrangement, fast in defrosting speed, high in comfort level, and capable of effectively avoiding a liquid impact situation in heating and defrosting operation.
Description
Technical field
The utility model relates to air-conditioning technical field, particularly relates to a kind of air-conditioning system.
Background technology
At present, heat pump type air corditioning system commonly used (comprise multi-joint machine system) all is to increase a cross valve on single cold air conditioning system basis, commutates to realize refrigeration and heats conversion by cross valve.Because unit is at heating operation after a period of time, the situation of frosting can appear in the outdoor heat exchanger surface, particularly with the reduction of outdoor environment temperature, and the increase of humidity, the frosting situation can be more and more serious, directly has influence on heating effect and comfortableness.Usually, in order to recover the heating effect of unit, unit need be converted to refrigerating operaton and defrost, and at this moment indoor set can't heat, and temperature reduces.When the defrosting end transformation of ownership is hot, because the indoor set air-out is low, be difficult to reach the effect that heats fast in addition.Above-mentioned factor all will badly influence and heat the comfortableness effect.
In order to address the above problem, a kind of scheme of the prior art is to utilize phase change heat storage material to realize heating continuously, and its system diagram as shown in Figure 6, among this figure, 1 is compressor, and 2 is oil eliminator, 3 is cross valve, and 4 is indoor heat exchanger, and 5 is indoor electric expansion valve, 6 is reservoir, and 7 is subcooler, and 8 is phase change heat accumulator, 9 is outdoor electric expansion valve, 10 is outdoor heat exchanger, and 11 is gas-liquid separator, and 12,13,14,15,16,17,24 is magnetic valve.There is following defective in this scheme:
1, because regenerative heat exchanger can only be arranged on the off-premises station, and structural design is dumb, it is bigger to take up space, and causes outer machine size big.
2, since this scheme be utilize condensed through indoor set in warm high-pressure refrigerant carry out accumulation of heat, therefore employed phase change heat storage material phase transformation temperature points will inevitably be lower, heat-storing material heat absorption and heat release speed can be slower, thereby make defrosting speed slower, prolong the defrost time, influence heating effect and comfort level equally.
3, in addition, defrost when the regenerative heat exchanger amount of stored heat is not enough, the cold-producing medium that can cause can not evaporating Wan in a large number enters compressor, thereby the reliability of compressor is caused fatal threat.
Summary of the invention
At above-mentioned prior art present situation, technical problem to be solved in the utility model is, a kind of air-conditioning system is provided, the regenerative heat exchanger of this air-conditioning system arranges flexibly, defrosting speed is fast, the comfort level height, and can effectively avoid the heating and defrosting liquid hammer situation in when operation.
In order to solve the problems of the technologies described above, a kind of air-conditioning system provided by the utility model comprises outdoor unit and one or more indoor unit that is in parallel, described outdoor unit comprises compressor, gas-liquid separator, oil eliminator, cross valve, outdoor heat exchanger, outdoor restricting element and first stop valve, described indoor unit comprises indoor heat exchanger, described compressor, described gas-liquid separator, described oil eliminator, described cross valve, described outdoor heat exchanger, described outdoor restricting element and described indoor heat exchanger connect to form refrigerant circulation loop by pipeline, and described first stop valve and described outdoor restricting element are connected in parallel; Described air-conditioning system also comprises regenerative heat exchanger, this regenerative heat exchanger has heat absorption heat exchanger tube, heat release heat exchanger tube, control valve and second stop valve, described heat absorption heat exchanger tube and the described control valve composition series pipe that is connected in series, this series pipe and described indoor unit are connected in parallel, described heat release heat exchanger tube and described second stop valve composition parallel pipeline that is connected in parallel, this parallel pipeline are connected in series on the pipeline between described gas-liquid separator and the described cross valve.
Among embodiment, described regenerative heat exchanger also comprises capillary therein, and an end of this capillary and the described heat release heat exchanger tube back that is connected in series is connected in parallel with described second stop valve.
Among embodiment, described regenerative heat exchanger also has assisted heating device therein.
Among embodiment, described assisted heating device is electric heater or hot water heat exchanger tube therein.
Therein among embodiment, described regenerative heat exchanger and described outdoor unit and the separate setting of described indoor unit.
Therein among embodiment, described outdoor unit also comprises first valve, second valve, the 3rd valve and the 4th valve, described first valve is connected with the air inlet of described gas-liquid separator, the gas outlet of described gas-liquid separator is connected with the air entry of described compressor, the exhaust outlet of described compressor is connected with first port of described cross valve through described oil eliminator, second port of described cross valve is communicated with described second valve, the 3rd port of described cross valve is connected with described the 3rd valve with described outdoor restricting element through described outdoor heat exchanger, and the 4th port of described cross valve is connected with described the 4th valve; Described indoor unit also comprises second joint that matches with described second valve and the 3rd joint that matches with described the 3rd valve; Described regenerative heat exchanger also comprises first joint that matches with described first valve and the 4th joint that matches with described the 4th valve.
Among embodiment, described air-conditioning system also comprises the short circuit tube connector therein, and the two ends of this short circuit tube connector have the 5th joint and the 6th joint that matches with described first valve and described the 4th valve respectively.
Among embodiment, described regenerative heat exchanger is arranged in described indoor unit or the described outdoor unit therein.
Among embodiment, described indoor unit also comprises indoor restricting element therein, and an end of this indoor restricting element and described indoor heat exchanger is connected in series.
Compared with prior art, air-conditioning system provided by the utility model has following beneficial effect:
1, the regenerative heat exchanger of air-conditioning system provided by the utility model arranges flexibly, both can be arranged in outdoor unit or the indoor unit in, also can independently arrange, reduce the size of outer machine.
2, the high temperature refrigerant that utilizes compressor directly to discharge of air-conditioning system provided by the utility model carries out accumulation of heat, therefore can adopt the higher phase change heat storage material of phase transformation temperature points, like this, when defrosting, the temperature difference of phase change heat storage material and cold-producing medium strengthens, the heat release speed of phase change heat storage material is fast, and corresponding defrosting speed also can be accelerated.
3, in addition, during defrosting, interior machine is also heating synchronously, and is therefore little for the fluctuations in indoor temperature influence, the comfortableness height.
Description of drawings
Fig. 1 is the system flow chart of air-conditioning system when refrigerating operaton among one of them embodiment of the utility model;
Fig. 2 is the system flow chart of air-conditioning system shown in Figure 1 when heating operation;
Fig. 3 is the system flow chart of air-conditioning system shown in Figure 1 when heating regenerative operation;
Fig. 4 is the system flow chart of air-conditioning system shown in Figure 1 when heating and defrosting moves;
Fig. 5 is the system flow chart of air-conditioning system shown in Figure 1 when no regenerative heat exchanger;
Fig. 6 is the system diagram that utilizes the air-conditioner that phase change heat storage material realizes and heating continuously of the prior art.
Among Fig. 1 to Fig. 5, the 10-outdoor unit; The 11-compressor; The 12-oil eliminator; The 13-cross valve; The 14-outdoor heat exchanger; The outdoor restricting element of 15-; 16-first stop valve; The 17-gas-liquid separator; 18a-first valve; 18b-second valve; 18c-the 3rd valve; 18d-the 4th valve; The 20-indoor unit; The 21-indoor heat exchanger; The indoor restricting element of 22-; 30-regenerative heat exchanger unit; The 31-heat exchanger tube that absorbs heat; 32-heat release heat exchanger tube; The 33-control valve; 34-second stop valve; The 35-capillary; 40-short circuit tube connector.
The specific embodiment
Also in conjunction with the embodiments the utility model is elaborated below with reference to accompanying drawing.Need to prove, under the situation of not conflicting, below feature among each embodiment and the embodiment can make up mutually.
As shown in Figure 1, the air-conditioning system among one of them embodiment of the utility model comprises outdoor unit 10, one or more indoor unit that is in parallel 20 and regenerative heat exchanger 30.
Wherein, described outdoor unit 10 comprises compressor 11, gas-liquid separator 17, oil eliminator 12, cross valve 13, outdoor heat exchanger 14, outdoor restricting element 15, first stop valve 16, the first valve 18a, the second valve 18b, the 3rd valve 18c and the 4th valve 18d, the described first valve 18a is connected with the air inlet of described gas-liquid separator 17, the gas outlet of described gas-liquid separator 17 is connected with the air entry of described compressor 11, the exhaust outlet of described compressor 11 is connected with first port of described cross valve 13 through described oil eliminator 12, second port of described cross valve 13 is communicated with the described second valve 18b, the 3rd port of described cross valve 13 is connected with described the 3rd valve 18c with described outdoor restricting element 15 through described outdoor heat exchanger 14, and the 4th port of described cross valve 13 is connected with described the 4th valve 18d.
Described indoor unit 20 comprises indoor heat exchanger 21, indoor restricting element 22, second joint that matches with the described second valve 18b and the 3rd joint that matches with described the 3rd valve 18c, and indoor restricting element 22, indoor heat exchanger 21, second joint and the 3rd joint are connected in series.
The 4th joint and phase change heat storage material that described regenerative heat exchanger 30 has heat absorption heat exchanger tube 31, control valve 33, heat release heat exchanger tube 32, second stop valve 34, first joint that matches with the described first valve 18a, matches with described the 4th valve 18d, described heat absorption heat exchanger tube 31 and the described control valve 33 composition series pipe that is connected in series, this series pipe and described indoor unit 20 are connected in parallel, described heat release heat exchanger tube 32 and the described second stop valve 34 composition parallel pipeline that is connected in parallel, the two ends of this parallel pipeline connect first joint and second joint respectively.Preferably, described regenerative heat exchanger also comprises capillary 35, is connected in parallel with described second stop valve 34 after an end of this capillary 35 and described heat release heat exchanger tube 32 is connected in series.When heating accumulation of heat, phase change heat storage material is by heat absorption heat exchanger tube 31 and cold-producing medium heat exchange, the phase change heat storage material heat absorption, and during heating and defrosting, phase change heat storage material is by heat release heat exchanger tube 32 and cold-producing medium heat exchange, phase change heat storage material heat release.Preferably, described regenerative heat exchanger also has assisted heating device, and this assisted heating device is electric heater or hot water heat exchanger tube or other thermal source.
Regenerative heat exchanger arranges flexibly, both can with described outdoor unit and the separate setting of described indoor unit, also can be arranged in described indoor unit or the described outdoor unit.
The operation principle of the air-conditioning system of the utility model embodiment is as follows:
1, during refrigerating operaton
As shown in Figure 1, the air-conditioning system of present embodiment is the same with the common air-conditioning system when refrigerating operaton, and control valve 33 cuts out, and first stop valve 16 and second stop valve 34 are opened.The outer machine heat exchanger of inlet chamber carries out condensation after the high-temperature gas passes oil eliminator 12 that compressor 11 is discharged, the cross valve 13 becomes liquid, then through first stop valve 16 (outdoor restricting element 15 is closed), enter indoor set, after indoor restricting element 22 throttlings of interior machine process, become the liquid of low-temp low-pressure, cold-producing medium carries out the heat exchange evaporation with indoor environment in indoor heat exchanger 21, the indoor cold that provides is provided.Pass through cross valve 13, second stop valve 34 again after the cold-producing medium evaporation, enter in the gas-liquid separator 17, turn back at last in the compressor 11.
2, during heating operation
Systemic circulation was the same with the circulation of ordinary hot heat pump heating when as shown in Figure 2, the air-conditioning system of present embodiment heated.First stop valve 16 is closed, and control valve 33 cuts out, and second stop valve 34 is opened.When heating, cross valve 13 electric, the exhaust of compressor 11 enters into indoor heat exchanger 21 and carries out heat exchange through oil eliminator 12, cross valve 13 respectively, carries out the heat supply heat release to indoor, refrigerant gas obtains condensation simultaneously.Then cold-producing medium evaporates through inlet chamber external heat exchanger 14 after indoor restricting element 22 and 15 throttlings of outdoor restricting element respectively, and refrigerant gas enters gas-liquid separator 17 by cross valve 13, second stop valve 34 subsequently, gets back to compressor 11 at last again.
When 3, heating regenerative operation
As shown in Figure 3, during accumulation of heat, first stop valve 16 is closed, and second stop valve 34 is opened, and control valve 33 is opened, cross valve 13.The exhaust of compressor 11 enters into branch pipe through cross valve 13, one the road flows into indoor heat exchanger 21 and indoor restricting element 22, another road enters in the heat absorption heat exchanger tube 31 of regenerative heat exchanger carries out heat exchange with phase change heat storage material, the phase change heat storage material heat absorption also undergoes phase transition, heat is stored, before flowing to outdoor restricting element 15 through control valve 33 then, converge with coming the cold-producing medium since indoor heat exchanger 21, pass through outdoor restricting element 15, cross valve 13, second stop valve 34 and gas-liquid separator 17 then successively, finally return compressor 11.
When 4, heating and defrosting moves
As shown in Figure 4, under the heating operation pattern, if when detecting outdoor heat exchanger 14 and needing defrosting, system's control then enters the heating and defrosting operation, realize heating continuously, and defrosting simultaneously.At this moment, first stop valve 16 is opened, and second stop valve 34 is closed, and control valve 33 cuts out.The exhaust of compressor 11 enters indoor heat exchanger 21 by oil eliminator 12, cross valve 13 respectively, and to carry out hot heat exchange be the indoor heating heat release, and indoor fan transfers low wind shelves to simultaneously; Middle temperature high pressure refrigeration machine after being condensed then passes through indoor restricting element 22, first stop valve, 16 inlet chamber external heat exchangers 14 respectively, to its defrost (this moment, outdoor fan was closed).The cold-producing medium of condenser after defrosting obtained further condensation, become refrigerant liquid, by cross valve 13, enter in the heat release heat exchanger tube 32 of regenerative heat exchanger then.Refrigerant liquid is become the cold-producing medium of low-temp low-pressure by capillary 35 throttlings in regenerative heat exchanger, then carry out heat exchange with the phase change heat storage material that holds full heat, the phase change heat storage material heat release, and cold-producing medium evaporation heat absorption, phase change heat storage material undergoes phase transition heat release.Last cold-producing medium has so just been realized the heating and defrosting operation circulation that heats continuously in gas-liquid separator 17 turns back to compressor 11.
5, regenerative heat exchanger short circuit
As shown in Figure 5, when not matching regenerative heat exchanger, only need utilize a short circuit tube connector 40 (two ends of short circuit tube connector 40 have the 5th joint and the 6th joint that matches with the described first valve 18a and described the 4th valve 18d respectively) that the corresponding first valve 18a of outdoor unit 10 and the 4th valve 18d are carried out short circuit and get final product.At this moment, unit just changes common air-conditioning unit into.
This shows that the air-conditioning system of the utility model embodiment has following beneficial effect:
1, the regenerative heat exchanger of the air-conditioning system that provides of the utility model embodiment arranges flexibly, both can be arranged in outdoor unit or the indoor unit in, also can independently arrange, reduce the size of outer machine.
2, the high temperature refrigerant that utilizes compressor directly to discharge of the air-conditioning system that provides of the utility model embodiment carries out accumulation of heat, therefore can adopt the higher phase change heat storage material of phase transformation temperature points, like this, when defrosting, the temperature difference of phase change heat storage material and cold-producing medium strengthens, the heat release speed of phase change heat storage material is fast, and corresponding defrosting speed also can be accelerated.
3, in addition, during defrosting, interior machine is also heating synchronously, and is therefore little for the fluctuations in indoor temperature influence, the comfortableness height.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (9)
1. air-conditioning system, comprise outdoor unit and one or more indoor unit that is in parallel, described outdoor unit comprises compressor, gas-liquid separator, oil eliminator, cross valve, outdoor heat exchanger, outdoor restricting element and first stop valve, described indoor unit comprises indoor heat exchanger, described compressor, described gas-liquid separator, described oil eliminator, described cross valve, described outdoor heat exchanger, described outdoor restricting element and described indoor heat exchanger connect to form refrigerant circulation loop by pipeline, and described first stop valve and described outdoor restricting element are connected in parallel; It is characterized in that, described air-conditioning system also comprises regenerative heat exchanger, this regenerative heat exchanger has heat absorption heat exchanger tube, heat release heat exchanger tube, control valve and second stop valve, described heat absorption heat exchanger tube and the described control valve composition series pipe that is connected in series, this series pipe and described indoor unit are connected in parallel, described heat release heat exchanger tube and described second stop valve composition parallel pipeline that is connected in parallel, this parallel pipeline are connected in series on the pipeline between described gas-liquid separator and the described cross valve.
2. air-conditioning system according to claim 1 is characterized in that, described regenerative heat exchanger also comprises capillary, is connected in parallel with described second stop valve after an end of this capillary and described heat release heat exchanger tube is connected in series.
3. air-conditioning system according to claim 1 is characterized in that, described regenerative heat exchanger also has assisted heating device.
4. air-conditioning system according to claim 3 is characterized in that, described assisted heating device is electric heater or hot water heat exchanger tube.
5. according to any described air-conditioning system in the claim 1 to 4, it is characterized in that described regenerative heat exchanger and described outdoor unit and the separate setting of described indoor unit.
6. air-conditioning system according to claim 5, it is characterized in that, described outdoor unit also comprises first valve, second valve, the 3rd valve and the 4th valve, described first valve is connected with the air inlet of described gas-liquid separator, the gas outlet of described gas-liquid separator is connected with the air entry of described compressor, the exhaust outlet of described compressor is connected with first port of described cross valve through described oil eliminator, second port of described cross valve is communicated with described second valve, the 3rd port of described cross valve is connected with described the 3rd valve with described outdoor restricting element through described outdoor heat exchanger, and the 4th port of described cross valve is connected with described the 4th valve; Described indoor unit also comprises second joint that matches with described second valve and the 3rd joint that matches with described the 3rd valve; Described regenerative heat exchanger also comprises first joint that matches with described first valve and the 4th joint that matches with described the 4th valve.
7. air-conditioning system according to claim 6 is characterized in that, described air-conditioning system also comprises the short circuit tube connector, and the two ends of this short circuit tube connector have the 5th joint and the 6th joint that matches with described first valve and described the 4th valve respectively.
8. according to any described air-conditioning system in the claim 1 to 4, it is characterized in that described regenerative heat exchanger is arranged in described indoor unit or the described outdoor unit.
9. air-conditioning system according to claim 1 is characterized in that, described indoor unit also comprises indoor restricting element, and an end of this indoor restricting element and described indoor heat exchanger is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220604687 CN203068769U (en) | 2012-11-14 | 2012-11-14 | Air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220604687 CN203068769U (en) | 2012-11-14 | 2012-11-14 | Air conditioning system |
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| CN203068769U true CN203068769U (en) | 2013-07-17 |
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| CN 201220604687 Withdrawn - After Issue CN203068769U (en) | 2012-11-14 | 2012-11-14 | Air conditioning system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103807997A (en) * | 2012-11-14 | 2014-05-21 | 珠海格力电器股份有限公司 | Air conditioner system and control method thereof |
| CN104515210A (en) * | 2013-09-30 | 2015-04-15 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN104748464A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Multiple on-line defrosting method and device of air conditioning system and air conditioner |
| CN105509384A (en) * | 2015-12-17 | 2016-04-20 | 珠海格力电器股份有限公司 | Defrosting method of multi-split air conditioning system and multi-split air conditioning system |
| CN105571193A (en) * | 2016-02-27 | 2016-05-11 | 李建华 | Heat pump application and energy storage system |
| CN105783332A (en) * | 2016-05-13 | 2016-07-20 | 李建华 | Heat pump system capable of achieving green-state community |
| CN106225290A (en) * | 2016-07-15 | 2016-12-14 | 珠海格力电器股份有限公司 | Air-conditioning and control method thereof |
| CN106839286A (en) * | 2017-01-10 | 2017-06-13 | 美的集团武汉制冷设备有限公司 | Defrosting control method, defrosting control system and air-conditioner |
| CN107655233A (en) * | 2017-08-08 | 2018-02-02 | 珠海格力电器股份有限公司 | Air-conditioner system and there is its air conditioner |
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2012
- 2012-11-14 CN CN 201220604687 patent/CN203068769U/en not_active Withdrawn - After Issue
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103807997B (en) * | 2012-11-14 | 2016-05-04 | 珠海格力电器股份有限公司 | Air-conditioning system and control method thereof |
| CN103807997A (en) * | 2012-11-14 | 2014-05-21 | 珠海格力电器股份有限公司 | Air conditioner system and control method thereof |
| CN104515210A (en) * | 2013-09-30 | 2015-04-15 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN104515210B (en) * | 2013-09-30 | 2017-08-29 | 珠海格力电器股份有限公司 | Air-conditioning system |
| CN104748464A (en) * | 2013-12-25 | 2015-07-01 | 珠海格力电器股份有限公司 | Multiple on-line defrosting method and device of air conditioning system and air conditioner |
| CN105509384B (en) * | 2015-12-17 | 2017-12-29 | 珠海格力电器股份有限公司 | The Defrost method and air conditioning multi-couple machine system of air conditioning multi-couple machine system |
| CN105509384A (en) * | 2015-12-17 | 2016-04-20 | 珠海格力电器股份有限公司 | Defrosting method of multi-split air conditioning system and multi-split air conditioning system |
| CN105571193A (en) * | 2016-02-27 | 2016-05-11 | 李建华 | Heat pump application and energy storage system |
| CN105571193B (en) * | 2016-02-27 | 2017-12-19 | 李建华 | A kind of heat pump application and energy storing system |
| CN105783332A (en) * | 2016-05-13 | 2016-07-20 | 李建华 | Heat pump system capable of achieving green-state community |
| CN106225290A (en) * | 2016-07-15 | 2016-12-14 | 珠海格力电器股份有限公司 | Air-conditioning and control method thereof |
| CN106839286A (en) * | 2017-01-10 | 2017-06-13 | 美的集团武汉制冷设备有限公司 | Defrosting control method, defrosting control system and air-conditioner |
| CN106839286B (en) * | 2017-01-10 | 2019-08-23 | 美的集团武汉制冷设备有限公司 | Defrosting control method, defrosting control system and air conditioner |
| CN107655233A (en) * | 2017-08-08 | 2018-02-02 | 珠海格力电器股份有限公司 | Air-conditioner system and there is its air conditioner |
| WO2019029233A1 (en) * | 2017-08-08 | 2019-02-14 | 格力电器（武汉）有限公司 | Air conditioning system and air conditioner having the same |
| CN107655233B (en) * | 2017-08-08 | 2020-07-31 | 珠海格力电器股份有限公司 | Air conditioner system and air conditioner with same |
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