CN102734881B - Heat pump air conditioning system and method for rapidly draining liquid accumulated in gas-liquid separator - Google Patents
Heat pump air conditioning system and method for rapidly draining liquid accumulated in gas-liquid separator Download PDFInfo
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- CN102734881B CN102734881B CN201110091494.5A CN201110091494A CN102734881B CN 102734881 B CN102734881 B CN 102734881B CN 201110091494 A CN201110091494 A CN 201110091494A CN 102734881 B CN102734881 B CN 102734881B
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- 239000007788 liquid Substances 0.000 title claims abstract description 141
- 238000004378 air conditioning Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 61
- 238000005086 pumping Methods 0.000 claims description 39
- 230000000694 effects Effects 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 abstract description 19
- 238000005057 refrigeration Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- Other Air-Conditioning Systems (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to a heat pump air conditioning system and a method for rapidly draining liquid accumulated in a gas-liquid separator. The heat pump air conditioning system at least comprises a compressor, the gas-liquid separator and a liquid storage tank; a gas inlet of the liquid storage tank is respectively communicated with a gas outlet of the compressor and a gas inlet of the gas-liquid separator; and a check valve is arranged between the gas inlet of the liquid storage tank and the gas inlet of the gas-liquid separator. When the gas pressure in the liquid storage tank is low, gas in the liquid storage tank can be leaked into the gas-liquid separator by the check valve, and thus, a communicating vessel is formed by the liquid storage tank and the gas-liquid separator, so that residual refrigerant liquid in the gas-liquid separator is drained into the liquid storage tank; and then high pressure refrigerant gas in the compressor enters the liquid storage tank by controlling the valve and the liquid storage tank is connected with an indoor heat exchanger, so that the refrigerant liquid in the liquid storage tank can be pressed into the indoor heat exchanger. According to the invention, the utilization efficiency of a refrigerant in a heat pump air conditioning outdoor unit circulating system can be improved and the operating cost of an air conditioner is reduced.
Description
Technical field
The present invention relates to field of air conditioning, heat pump type air conditioning system and the method for the liquid particularly accumulating in a kind of quick drainage gas-liquid separator.
Background technology
Air-conditioning can be divided into single cold type and pump type heat etc. according to function.Single cold type air-conditioning can only freeze, and can not heat, and is applicable to not need winter the southern area of heating.Heat pump type air conditioner can freeze, heat, and is applicable to China's overwhelming majority area.Wherein, heat pump air conditioner is adopted by users with the feature that it not only can freeze but also can heat, the scope of application is wider.As shown in Figure 1, heat pump type air conditioning system is comprised of off-premises station 100 and indoor set 200, and off-premises station 100 main composition parts comprise compressor 110, gas-liquid separator 120, four-way change-over valve 130, outdoor heat exchanger 140 and throttling arrangement 150 etc.After starting initial stage of air-conditioning or defrost and finishing, more cold-producing medium is gathered in the interior meeting of gas-liquid separator 120, and the time that these cold-producing mediums need to be longer could be drawn into and in refrigeration system, participate in kind of refrigeration cycle by compressor.Therefore, within the longer time, the cold-producing medium that participating in refrigeration system circulates turns is less, and when serious, the phenomenon of fluorine will appear lacking in refrigeration system, and the efficiency of air-conditioning reduces, and even low-pressure failure alarm may occur.
At present, in order to solve the ubiquitous problem of above-mentioned heat pump air conditioner, the general method that increases refrigerant charge that adopts is processed in the industry, but this will increase use cost, and can not improve the efficiency of air-conditioning.
Therefore, be necessary to propose a kind of heat pump type air conditioning system structure, the cold-producing medium accumulating in drainage gas-liquid separator fast, avoids the low voltage failure causing due to scarce fluorine in refrigeration system.
Summary of the invention
In summary of the invention part, introduced the concept of a series of reduced forms, this will further describe in specific embodiment part.Summary of the invention part of the present invention does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain of attempting to determine technical scheme required for protection.
The heat pump type air conditioning system of the liquid accumulating in a kind of quick drainage gas-liquid separator, comprise off-premises station (100), the indoor heat exchanger (200) being connected with described off-premises station (100), described off-premises station (100) comprises compressor (110), gas-liquid separator (120), four-way change-over valve (130), outdoor heat exchanger (140) and throttling arrangement (150), it is characterized in that, the bottom of described gas-liquid separator (120) is provided with liquid outlet (123), described heat pump type air conditioning system also comprises auxiliary pumping equipment (160), described auxiliary pumping equipment (160) connects respectively the gas outlet (111) of described compressor (110), first port (201) of described indoor heat exchanger (200) and the liquid outlet (123) of described gas-liquid separator (120), liquid in described gas-liquid separator (120) enters described auxiliary pumping equipment (160) via liquid outlet (123), and described liquid enters described indoor heat exchanger (200) via described the first port (201) under the effect of the Compressed Gas of the gas outlet from described compressor (110) (111).
According to another aspect of the present invention, described auxiliary pumping equipment (160) comprises fluid reservoir (161), on described fluid reservoir (161), be provided with air inlet (1611), inlet (1612) and liquid outlet (1613), the air inlet of described fluid reservoir (1611) connects respectively the gas outlet (111) of described compressor (110) and the air inlet (121) of described gas-liquid separator (120), the inlet (1612) of described fluid reservoir (161) connects the liquid outlet (123) of described gas-liquid separator (120), the liquid outlet (1613) of described fluid reservoir (161) connects first port (201) of described indoor heat exchanger (200).
According to another aspect of the present invention, between the air inlet (1611) of described fluid reservoir (161) and the gas outlet (111) of compressor (110), be provided with the first valve (162).
According to another aspect of the present invention, between the air inlet (1611) of described fluid reservoir (161) and the air inlet (121) of gas-liquid separator (120), be provided with check valve (163) so that described gas-liquid separator (120) to fluid reservoir (161) is one-way conduction state.
According to another aspect of the present invention, between the liquid outlet (123) of described gas-liquid separator (120) and the inlet (1612) of fluid reservoir (161), be provided with the second valve (164).
According to another aspect of the present invention, between the liquid outlet (1613) of described fluid reservoir (161) and first port (201) of indoor heat exchanger (200), be provided with check valve (165) so that described fluid reservoir (161) to indoor heat exchanger (200) is one-way conduction state.
According to another aspect of the present invention, between the air inlet (1611) of described fluid reservoir (161) and the gas outlet (111) of compressor (110), be provided with capillary (166).
According to another aspect of the present invention, described the first valve (162) and the second valve (164) are magnetic valve or motor-driven valve.
A method of utilizing the liquid accumulating in the heat pump type air conditioning system drainage gas-liquid separator as described in above any one, is characterized in that comprising:
The first step, make to be conducting state between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110), make to be cut-off state between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160), continue 3～5 minutes;
Second step, make to be cut-off state between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110), make to be conducting state between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160), continue 3～5 minutes;
The 3rd step, repeat the first step and second step, until the degree of superheat of described compressor (110) suction temperature is greater than five degree, make to be cut-off state between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110), make to be cut-off state between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160).
According to another aspect of the present invention, make to be conducting between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110) or cut-off state realizes by opening or close the first valve.
According to another aspect of the present invention, make to be conducting between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160) or cut-off state realizes by opening or close the second valve.
Accompanying drawing explanation
Following accompanying drawing of the present invention is used for understanding the present invention in this as a part of the present invention.Shown in the drawings of embodiments of the invention and description thereof, be used for explaining principle of the present invention.In the accompanying drawings,
Fig. 1 is the schematic diagram of existing heat pump type air conditioning system structure;
Fig. 2 is the first schematic diagram according to heat pump type air conditioning system structure of the present invention;
Fig. 3 is the second schematic diagram according to heat pump type air conditioning system structure of the present invention.
The specific embodiment
In the following description, a large amount of concrete details have been provided to more thorough understanding of the invention is provided.Yet, it will be apparent to one skilled in the art that the present invention can be implemented without one or more these details.In other example, for fear of obscuring with the present invention, for technical characterictics more well known in the art, be not described.
Below by embodiment also by reference to the accompanying drawings, technical scheme of the present invention is illustrated.
As shown in Figure 2, the indoor heat exchanger 200 that heat pump type air conditioning system according to the present invention comprises off-premises station 100 and is connected by pipeline with off-premises station.
Off-premises station 100 comprises compressor 110, gas-liquid separator 120, four-way change-over valve 130, outdoor heat exchanger 140, throttling arrangement 150 and auxiliary pumping equipment 160, wherein, four-way change-over valve 130 the first port respect to one another is connected respectively the second port 202 of indoor heat exchanger 200 and the input of outdoor heat exchanger 140 with the second port, the output of outdoor heat exchanger 140 connects the input of throttling arrangement 150, and the output of throttling arrangement 150 connects the first port 201 of indoor heat exchanger 200.In addition, four-way change-over valve 130 the 3rd port respect to one another is connected respectively the gas outlet 111 of compressor 110 and the air inlet 121 of gas-liquid separator 120 with the 4th port, and the gas outlet 122 of gas-liquid separator 120 connects the air inlet 112 of compressor 110.The bottom of gas-liquid separator 120 is provided with liquid outlet 123.
As shown in Figure 3, auxiliary pumping equipment 160 comprises fluid reservoir 161, and the top of fluid reservoir 161 is provided with air inlet 1611, and bottom is provided with inlet 1612 and liquid outlet 1613.The air inlet 1611 of fluid reservoir 161 connects the gas outlet 111 of compressor 110 and the air inlet 121 of gas-liquid separator 120 by pipeline respectively, between the air inlet 1611 of fluid reservoir 161 and the gas outlet 111 of compressor 110, be provided with the first valve 162, between the air inlet 1611 of fluid reservoir 161 and the air inlet 121 of gas-liquid separator 120, be provided with check valve 163, so that be one-way conduction state from gas-liquid separator 120 to fluid reservoir 161, that is to say, when fluid reservoir 161 is enough large to the pressure reduction of gas-liquid separator 120 directions, fluid reservoir 161 to gas-liquid separator 130 is cut-off state.When fluid reservoir 161 to the pressure reduction of gas-liquid separator 120 directions hour, fluid reservoir 161 to gas-liquid separator 120 can micro-leakage.It is the disclosed one-way valve structures of utility model patent of " ZL 200820140042.5 " that check valve 163 can adopt the patent No., on valve block due to the disclosed check valve of above-mentioned utility model patent, be provided with at least one through hole, therefore the gas in fluid reservoir 161 can leak in gas-liquid separator 120 gradually by through hole, or can also adopt ball check valve, the present invention is not construed as limiting the concrete structure of check valve 123, it will be appreciated by persons skilled in the art that the one-way valve structures that can also adopt other.
The inlet 1612 of fluid reservoir 161 connects the liquid outlet 123 of gas-liquid separator 120 by discharging tube, and is provided with the second valve 164 between liquid outlet 123 and the inlet 1612 of fluid reservoir 161.The first port 201 of the liquid outlet 1613 junction chamber external heat exchangers 200 of fluid reservoir 161, and be provided with check valve 165 between liquid outlet 1613 and the first port 201, so that the direction from fluid reservoir 161 to outdoor heat exchanger 200 is one-way conduction state, that is to say, when indoor heat exchanger 200 is enough large to the pressure reduction of fluid reservoir 161, indoor heat exchanger 200 to fluid reservoir 161 is cut-off state.
Further, between the air inlet 1611 of fluid reservoir 161 and the gas outlet 111 of compressor 110, be also provided with capillary 166.Because the pressure that comes from the refrigerant gas in compressor is higher than the liquid in fluid reservoir 161 being pressed into needed pressure in indoor heat exchanger 200, therefore adopt capillary 166 can reduce the pressure of the refrigerant gas that enters fluid reservoir 161.
Further, described the first valve 162 and the second valve 164 all can adopt magnetic valve or motor-driven valve.
The present invention is not construed as limiting the specific embodiment of auxiliary pumping equipment, it will be understood by those skilled in the art that, as long as can make the liquid accumulating in gas-liquid separator enter in auxiliary pumping equipment, can enter in refrigeration system just passable under the effect of the Compressed Gas that then this liquid is discharged in compressor.
Embodiment two
Utilize the method step of cold-producing medium in the heat pump air conditioner outdoor unit structure drainage gas-liquid separator of describing in embodiment one as follows:
The first step, makes to be conducting state between described auxiliary pumping equipment 160 and the gas outlet 111 of described compressor 110, makes the liquid outlet 123 of described gas-liquid separator 120 be cut-off state between described auxiliary pumping equipment 160, continues this state 3～5 minutes.Owing to being conducting state between the liquid outlet 123 of gas-liquid separator 120 bottoms and the inlet 1612 of fluid reservoir 161 bottoms, that is to say, now fluid reservoir 161 and gas-liquid separator 120 form linker, so the refrigerant liquid in gas-liquid separator 120 will flow in fluid reservoir 161.
Second step, makes to be cut-off state between described auxiliary pumping equipment 160 and the gas outlet 111 of described compressor 110, makes the liquid outlet 123 of described gas-liquid separator 120 be conducting state between described auxiliary pumping equipment 160, continues this state 3～5 minutes.Higher pressure refrigerant gas in compressor 110 enters in fluid reservoir 161 by the air inlet 1611 on fluid reservoir 161, and under the effect of higher pressure refrigerant gas, the refrigerant liquid in fluid reservoir 161 flows in indoor heat exchanger 200 by check valve 165.
The 3rd step, repeat the first step and second step, until the degree of superheat of the suction temperature of compressor 110 is greater than five degree, make to be cut-off state between described auxiliary pumping equipment 160 and the gas outlet 111 of described compressor 110, make the liquid outlet 123 of described gas-liquid separator 120 be cut-off state between described auxiliary pumping equipment 160.
In said method, make to be conducting between described auxiliary pumping equipment 160 and the gas outlet 111 of described compressor 110 or cut-off state can realize by opening or close the first valve, when structure that auxiliary pumping equipment 160 adopts described in embodiment one, described the first valve is the first valve 162.
In said method, the liquid outlet 123 of described gas-liquid separator 120 can be realized by opening or close the second valve to being conducting or cut-off state between described auxiliary pumping equipment 160, when structure that auxiliary pumping equipment 160 adopts described in embodiment one, described the second valve is the second valve 164.
In the 3rd step of said method, the measuring method of the degree of superheat of described compressor 110 suction temperatures is: utilize temperature sensor to detect the temperature (Ts) that is connected to the tube connector between compressor 110 and the gas outlet 122 of gas-liquid separator 120, simultaneously, by pressure sensor, detect the pressure (Ps) of this tube connector, by physical properties formula, can calculate the saturation temperature (Te) that this pressure (Ps) is corresponding, the degree of superheat is Ts-Te.
When the first valve 162 is opened, when the second valve 164 is closed, higher pressure refrigerant gas in compressor 110 enters fluid reservoir 161, refrigerant liquid in fluid reservoir 161 is pressed in indoor heat exchanger 200, and now check valve 163 can avoid the refrigerant liquid in fluid reservoir 161 to enter in a large number in gas-liquid separator 120 at short notice.When the first valve 162 is closed, when the second valve 164 is opened, in fluid reservoir 161, be full of refrigerant gas, this gas can leak in gas-liquid separator 120 gradually by check valve 163, thereby make gas-liquid separator 120 and fluid reservoir 161 form linker, so that while again opening the second valve 164, the refrigerant liquid in gas-liquid separator 120 can flow in fluid reservoir 161.
The present invention has added the auxiliary pumping equipment with fluid reservoir in existing heat pump air conditioner off-premises station, and fluid reservoir is connected with compressor, gas-liquid separator and indoor heat exchanger, make the refrigerant liquid accumulating in gas-liquid separator can flow in fluid reservoir, and the higher pressure refrigerant gas diffusing out in compressor is filled with to fluid reservoir, refrigerant liquid in fluid reservoir flows in refrigeration system under the effect of pressure, cold-producing medium in air conditioner circulating system is fully utilized, improve the utilization ratio of cold-producing medium, reduced the operating cost of air-conditioning.
The present invention is illustrated by above-described embodiment, but should be understood that, above-described embodiment is the object for giving an example and illustrating just, but not is intended to the present invention to be limited in described scope of embodiments.In addition it will be appreciated by persons skilled in the art that the present invention is not limited to above-described embodiment, according to instruction of the present invention, can also make more kinds of variants and modifications, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by the appended claims and equivalent scope thereof.
Claims (5)
1. the heat pump type air conditioning system of the liquid accumulating in a quick drainage gas-liquid separator, comprise off-premises station (100), the indoor heat exchanger (200) being connected with described off-premises station (100), described off-premises station (100) comprises compressor (110), gas-liquid separator (120), four-way change-over valve (130), outdoor heat exchanger (140) and throttling arrangement (150), it is characterized in that, the bottom of described gas-liquid separator (120) is provided with liquid outlet (123), described heat pump type air conditioning system also comprises auxiliary pumping equipment (160), described auxiliary pumping equipment (160) connects respectively the gas outlet (111) of described compressor (110), first port (201) of described indoor heat exchanger (200) and the liquid outlet (123) of described gas-liquid separator (120), liquid in described gas-liquid separator (120) enters described auxiliary pumping equipment (160) via liquid outlet (123), and described liquid enters described indoor heat exchanger (200) via described the first port (201) under the effect of the Compressed Gas of the gas outlet from described compressor (110) (111), described auxiliary pumping equipment (160) comprises fluid reservoir (161), on described fluid reservoir (161), be provided with air inlet (1611), inlet (1612) and liquid outlet (1613), the air inlet of described fluid reservoir (1611) connects respectively the gas outlet (111) of described compressor (110) and the air inlet (121) of described gas-liquid separator (120), the inlet (1612) of described fluid reservoir (161) connects the liquid outlet (123) of described gas-liquid separator (120), the liquid outlet (1613) of described fluid reservoir (161) connects first port (201) of described indoor heat exchanger (200), between the air inlet (1611) of described fluid reservoir (161) and the gas outlet (111) of compressor (110), be provided with the first valve (162), between the air inlet (1611) of described fluid reservoir (161) and the air inlet (121) of gas-liquid separator (120), be provided with check valve (163) so that described gas-liquid separator (120) to fluid reservoir (161) is one-way conduction state, between the liquid outlet (123) of described gas-liquid separator (120) and the inlet (1612) of fluid reservoir (161), be provided with the second valve (164), between the liquid outlet (1613) of described fluid reservoir (161) and first port (201) of indoor heat exchanger (200), be provided with check valve (165) so that described fluid reservoir (161) to indoor heat exchanger (200) is one-way conduction state, between the air inlet (1611) of described fluid reservoir (161) and the gas outlet (111) of compressor (110), be provided with capillary (166).
2. heat pump type air conditioning system as claimed in claim 1, is characterized in that, described the first valve (162) and the second valve (164) are magnetic valve or motor-driven valve.
3. a method of utilizing the liquid accumulating in heat pump type air conditioning system drainage gas-liquid separator as claimed in claim 1 or 2, is characterized in that comprising:
The first step, make to be conducting state between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110), make to be cut-off state between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160), continue 3～5 minutes;
Second step, make to be cut-off state between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110), make to be conducting state between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160), continue 3～5 minutes;
The 3rd step, repeat the first step and second step, until the degree of superheat of described compressor (110) suction temperature is greater than five degree, make to be cut-off state between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110), make to be cut-off state between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160).
4. method as claimed in claim 3, is characterized in that, makes to be conducting between described auxiliary pumping equipment (160) and the gas outlet (111) of described compressor (110) or cut-off state realizes by opening or close the first valve.
5. method as claimed in claim 3, is characterized in that, makes to be conducting between the liquid outlet (123) of described gas-liquid separator (120) and described auxiliary pumping equipment (160) or cut-off state realizes by opening or close the second valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110091494.5A CN102734881B (en) | 2011-04-08 | 2011-04-08 | Heat pump air conditioning system and method for rapidly draining liquid accumulated in gas-liquid separator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110091494.5A CN102734881B (en) | 2011-04-08 | 2011-04-08 | Heat pump air conditioning system and method for rapidly draining liquid accumulated in gas-liquid separator |
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| CN102734881A CN102734881A (en) | 2012-10-17 |
| CN102734881B true CN102734881B (en) | 2014-07-16 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968602B (en) * | 2013-01-29 | 2016-06-29 | 约克（无锡）空调冷冻设备有限公司 | Air source heat pump system |
| CN105698320A (en) * | 2016-04-20 | 2016-06-22 | 广东美的制冷设备有限公司 | Air-conditioning system |
| CN109028451B (en) * | 2018-05-24 | 2019-09-17 | 珠海格力电器股份有限公司 | Method, device, computer equipment and storage medium for gas-liquid separation |
| CN109210630A (en) * | 2018-09-29 | 2019-01-15 | 珠海格力电器股份有限公司 | Convection and radiation combined heat exchange system, heat exchange equipment and control method |
| CN111271892B (en) * | 2018-12-05 | 2021-11-05 | 约克广州空调冷冻设备有限公司 | Refrigeration system |
| CN112361669B (en) * | 2020-11-26 | 2023-07-28 | 珠海格力电器股份有限公司 | Multi-split system and control method thereof |
| CN115899851B (en) * | 2022-10-11 | 2024-09-03 | 珠海格力电器股份有限公司 | Outdoor unit of water source multi-split air conditioner, water source multi-split air conditioner system and control method of water source multi-split air conditioner system |
| CN116592537A (en) * | 2023-05-16 | 2023-08-15 | 珠海格力电器股份有限公司 | A fluorine pump compression refrigeration system and its control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030037905A1 (en) * | 2001-08-22 | 2003-02-27 | Kuo-Liang Weng | Air conditioning system performing composite heat transfer through change of water two phases (liquid vapor) |
| JP2003202135A (en) * | 2002-01-10 | 2003-07-18 | Sanyo Electric Co Ltd | Regenerative air-conditioning device |
| CN201476397U (en) * | 2009-08-04 | 2010-05-19 | 南京五洲制冷集团有限公司 | Temperature-adjusting dehumidifier of water source heat pump |
| CN201652663U (en) * | 2010-04-29 | 2010-11-24 | 四川长虹空调有限公司 | Heat recovery heat pump air conditioning system |
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Address after: Tokyo, Japan Patentee after: HITACHI-JOHNSON CONTROLS AIR CONDITIONING, Inc. Address before: Tokyo, Japan Patentee before: Hitachi Johnson Automatic Air Conditioning Co.,Ltd. |
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Effective date of registration: 20181227 Address after: Tokyo, Japan Patentee after: Hitachi Johnson Automatic Air Conditioning Co.,Ltd. Address before: 511685 Xuetian Management Zone, Longshan Town, Fogang County, Qingyuan City, Guangdong Province Patentee before: YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION Co.,Ltd. Effective date of registration: 20181227 Address after: Longtian Town, Fogang County, Qingyuan, Guangdong Patentee after: YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION Co.,Ltd. Address before: 511685 Xuetian Management Zone, Longshan Town, Fogang County, Qingyuan City, Guangdong Province Co-patentee before: JOHNSON CONTROLS TECHNOLOGY Co. Patentee before: YORK GUANGZHOU AIR CONDITIONING AND REFRIGERATION Co.,Ltd. |
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