CN202119019U - Air-conditioner capable of using flammable refrigeration agent - Google Patents
Air-conditioner capable of using flammable refrigeration agent Download PDFInfo
- Publication number
- CN202119019U CN202119019U CN2011201720302U CN201120172030U CN202119019U CN 202119019 U CN202119019 U CN 202119019U CN 2011201720302 U CN2011201720302 U CN 2011201720302U CN 201120172030 U CN201120172030 U CN 201120172030U CN 202119019 U CN202119019 U CN 202119019U
- Authority
- CN
- China
- Prior art keywords
- premises station
- valve
- magnetic valve
- heat exchanger
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
An air-conditioner capable of using flammable refrigeration agent comprises an outdoor machine and an indoor machine. More than one concentration detectors used for detecting concentration of the flammable refrigeration agent are arranged inside or vicinity of the outdoor machine. In according to safety requirements of a split air-conditioner using the flammable refrigeration agent, concentration detectors used for detecting the concentration of the flammable refrigeration agent are arranged at a plurality of positions of the outdoor machine, solenoid valves are arranged at a plurality of pipes of the outdoor machine, corresponding valves are adjusted through monitoring of refrigeration agent concentration of relative parts of the outdoor machine. When leakage occurs, leakage amount of refrigerant is minimized, safety of the outdoor machine is guaranteed. The air-conditioner capable of using the flammable refrigeration agent is simple and reasonable in structure, and safe and realizable in usage.
Description
Technical field
The utility model relate to a kind of with inflammable substance as cold-producing medium (R32, R290, split-type air conditioner R161), particularly a kind of air-conditioner that uses combustible refrigerant.
Background technology
Employed cold-producing medium is R22 or R410A mostly in the air-conditioning now; But weigh from the index of ODP and GWP; The two has greater environmental impacts, and is increasingly high along with energy-conservation and environmental protection requirement, and the cold-producing medium of how selecting to have fewer environmental impacts becomes the key of research.Under this background, the combustible refrigerant of low GWP value gets into sight line, like R290 (propane), and R32 (difluoromethane), R161 (fluoroethane) etc.But because such cold-producing medium has combustibility, the leakage of controlling such cold-producing medium is just extremely important.Research shows that in SPLIT AIR-CONDITIONING SYSTEM, the cold-producing medium in the off-premises station heat exchanger accounts for more than 60% of system refrigerant total amount, and the cold-producing medium in the compressor accounts for more than 25% of cold-producing medium total amount; So the problem safe in utilization of off-premises station can not be ignored.
Chinese patent document number CN201582948U discloses a kind of air-conditioner on September 15th, 2010; Comprise the refrigerating/heat pump air-conditioning system that compressor, control assembly, cross valve, indoor heat converter, throttle mechanism, off-premises station heat exchanger are formed; Be respectively arranged with air conditioner connecting pipe liquid valve and air conditioner connecting pipe air valve at the two ends of heat exchanger indoor unit; The tube connector of off-premises station heat exchanger and indoor set heat exchanger is provided with the valve of control piper break-make, and this valve and control assembly are electrically connected.This structure is only considered indoor safety, and has ignored the problem that the off-premises station refrigerant is revealed, and remains further perfect.
The utility model content
The purpose of the utility model aims to provide a kind of air-conditioner of simple and reasonable, safe and reliable use combustible refrigerant, to overcome weak point of the prior art.
A kind of air-conditioner that uses combustible refrigerant by the design of this purpose comprises off-premises station and indoor set, its architectural feature be off-premises station inner or near be provided with the concentration detector that is used to detect combustible refrigerant concentration more than.
Said off-premises station comprises compressor, off-premises station heat exchanger, outdoor motor and off-premises station control assembly; The blast pipe of compressor is connected with cross valve respectively with muffler; The other two ends of cross valve respectively with an end of off-premises station heat exchanger and indoor set in an end of indoor set heat exchanger be connected, the other end of off-premises station heat exchanger is connected with the other end of indoor set heat exchanger through throttle part; Wherein, between said cross valve and the said blast pipe, be connected with first magnetic valve, second magnetic valve and the 3rd magnetic valve between the said muffler and between the end of said off-premises station heat exchanger respectively.Closing and open by control assembly of each magnetic valve provides signal according to the ruuning situation of air-conditioning, closes during outage, opens during energising.
Said concentration detector is provided with three; Wherein, the first concentration detector configuration near compressor return air pipe and blast pipe, the second concentration detector configuration near cross valve, near the 3rd concentration detector configuration being connected the pipeline between off-premises station heat exchanger and throttle part.Each concentration detector is connected with the off-premises station control assembly through holding wire.
The pipeline that said indoor set heat exchanger is connected with cross valve is provided with first stop valve; Said throttle part comprises electric expansion valve and capillary.Electric expansion valve is regulated flow as throttle device; The pipeline that said throttle part is connected with the indoor set heat exchanger is provided with second stop valve.
A kind of control method of using the air-conditioner of combustible refrigerant; It is characterized in that the combustible refrigerant concentration of basis at the detected correspondence position of concentration detector of diverse location; This concentration signal is delivered to the off-premises station control assembly, and the off-premises station control assembly is controlled each magnetic valve, electric expansion valve, outdoor motor and compressor according to concentration signal; Wherein, before the setting off-premises station powered on, first magnetic valve, second magnetic valve, the 3rd magnetic valve and electric expansion valve were in closed condition; Flammable refrigerant concentration parameter is N0 in the setting off-premises station control assembly; The concentration value that the first concentration detector records is N1, and the concentration value that the second concentration detector records is N2, and the concentration value that the 3rd concentration detector records is N3.Above-mentioned after off-premises station powers on, outdoor motor brings into operation with maximum speed immediately, mainly is for fear of the interference of foreign gas to the concentration detector.
In the off-premises station start-up course: after off-premises station powered on, outdoor motor brought into operation with maximum speed; Simultaneously, three concentration detectors are opened, electric expansion valve and each magnetic valve state that keeps shut.As outdoor motor operation t1 after second, if N1＜N0 and N2＜N0 and N3＜N0, then each parts of off-premises station are normally carried out dependent instruction.When outdoor motor moves t1 after second,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning, compressor does not start, first magnetic valve, second magnetic valve and the equal no power of the 3rd magnetic valve, and the state that keeps shut, simultaneously, electric expansion valve increases S step on former basis closes, and outdoor motor continues with the maximum speed continuous service; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In the off-premises station running, if N1＜N0 and N2＜N0 and N3＜N0, then each parts of off-premises station are normally carried out dependent instruction; Wherein, first magnetic valve, second magnetic valve and the 3rd magnetic valve all are in opening, and electric expansion valve is regulated by control program.
In air-conditioner ventilation running,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning, compressor does not start, first magnetic valve, second magnetic valve and the equal no power of the 3rd magnetic valve, and the state that keeps shut, simultaneously, electric expansion valve increases S step on former basis closes, and outdoor motor continues with the maximum speed continuous service; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In air-conditioner refrigerating operaton process,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning; The off-premises station control assembly sends instruction to compressor, electric expansion valve, outdoor motor, second magnetic valve, the 3rd magnetic valve simultaneously, make compressor shutdown, electric expansion valve on former basis, increase the S step close, outdoor motor with maximum speed operation, the outage of second magnetic valve close, the 3rd magnetic valve cuts off the power supply and cuts out; T2 is after second, and the off-premises station control assembly sends instruction to first magnetic valve closes its outage; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In the air conditioner heat-production running,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning; The off-premises station control assembly sends instruction to compressor, electric expansion valve, outdoor motor, cross valve, second magnetic valve, the 3rd magnetic valve simultaneously, make compressor shutdown, electric expansion valve on former basis, increase the S step close, outdoor motor with maximum speed operation, cross valve outage, the outage of second magnetic valve close, the 3rd magnetic valve cuts off the power supply and cuts out; T2 is after second, and the off-premises station control assembly sends instruction to first magnetic valve closes its outage; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In air-conditioner dehumidifying or heating and defrosting running,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning; The off-premises station control assembly sends instruction to compressor, electric expansion valve, outdoor motor, second magnetic valve, the 3rd magnetic valve simultaneously, make compressor shutdown, electric expansion valve on former basis, increase the S step close, outdoor motor with maximum speed operation, the outage of second magnetic valve close, the 3rd magnetic valve cuts off the power supply and cuts out; T2 is after second, and the off-premises station control assembly sends instruction to first magnetic valve closes its outage; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In addition, in the standby of air-conditioning system, startup, operation, stopping process, off-premises station is if the situation of N1＜N0 and N2＜N0 and N3＜N0 occurs satisfying, sends behind the alarm command action scheme override of off-premises station associated components and carries out.If the action scheme of off-premises station associated components conflicts with the action scheme of other instructions behind the alarm command if send, be as the criterion with alarm command.
The utility model is to the security needs of combustible refrigerant split-type air conditioner; Be provided with the concentration detector that is used to detect combustible refrigerant concentration in the many places of off-premises station, and on the pipeline of off-premises station many places, magnetic valve be set, through the refrigerant concentration of monitoring off-premises station relevant portion; Corresponding valve is regulated; When taking place to leak, reduce the leakage rate of refrigerant, to guarantee the safety of off-premises station as far as possible.It is simple and reasonable, safe and reliable.
Description of drawings
Fig. 1 is the utility model one example structure sketch map.
Fig. 2 is the flow chart of the utility model start-up course.
Fig. 3 is the flow chart in the utility model running.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Referring to Fig. 1, the air-conditioner of this use combustible refrigerant comprises off-premises station 13 and indoor set, off-premises station 13 inner or near be provided with the concentration detector that is used to detect combustible refrigerant concentration more than.Off-premises station 13 comprises compressor 1, off-premises station heat exchanger 3, outdoor motor and off-premises station control assembly; The blast pipe of compressor 1 is connected with cross valve 2 respectively with muffler; Cross valve 2 other two ends respectively with an end of off-premises station heat exchanger 3 and indoor set in an end of indoor set heat exchanger be connected, the other end of off-premises station heat exchanger 3 is connected with the other end of indoor set heat exchanger through throttle part; Wherein, between said cross valve 2 and the said blast pipe, be connected with first magnetic valve 5, second magnetic valve 6 and the 3rd magnetic valve 7 between the said muffler and between the end of said off-premises station heat exchanger 3 respectively; Said concentration detector is provided with three; Wherein, the first concentration detector 8 is configured near compressor 1 muffler and the blast pipe, and the second concentration detector 9 is configured near the cross valve 2, and the 3rd concentration detector 10 is configured near being connected the pipeline between off-premises station heat exchanger 3 and the throttle part.The pipeline that the indoor set heat exchanger is connected with cross valve 2 is provided with first stop valve 11; Throttle part comprises electric expansion valve 4 and capillary; The pipeline that said throttle part is connected with the indoor set heat exchanger is provided with second stop valve 12.
Above-mentioned indoor set, indoor set heat exchanger, outdoor motor and off-premises station control assembly are not shown.
A kind of control method of using the air-conditioner of combustible refrigerant; According to combustible refrigerant concentration at the detected correspondence position of concentration detector of diverse location; This concentration signal is delivered to the off-premises station control assembly, and the off-premises station control assembly is controlled each magnetic valve, electric expansion valve 4, outdoor motor and compressor 1 according to concentration signal; Wherein, set before off-premises station powers on, first magnetic valve 5, second magnetic valve 6, the 3rd magnetic valve 7 and electric expansion valve 4 are in closed condition; Flammable refrigerant concentration parameter is N0 in the setting off-premises station control assembly; The concentration value that the first concentration detector 8 records is N1, and the concentration value that the second concentration detector 9 records is N2, and the concentration value that the 3rd concentration detector 10 records is N3.
Above-mentioned concentration value is the percent value of the concentration absolute value that records and flammable cold-producing medium burning least concentration value LFL, is 100% like this value, means that then flammable cold-producing medium is in the state of can lighting, and low more meaning is safe more.N0 is set at 15%.
Referring to Fig. 2, in off-premises station 13 start-up courses: after off-premises station 13 powered on, outdoor motor brought into operation with maximum speed; Simultaneously, three concentration detectors are opened, electric expansion valve 4 and each magnetic valve state that keeps shut.As outdoor motor operation t1 after second, if N1＜N0 and N2＜N0 and N3＜N0, then off-premises station 13 each parts are normally carried out dependent instruction.When outdoor motor moves t1 after second,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning, compressor 1 does not start, first magnetic valve 5, second magnetic valve 6 and the 3rd magnetic valve 7 equal no powers, and the state that keeps shut, simultaneously, electric expansion valve 4 increases the S step on former basis closes, and outdoor motor continues with the maximum speed continuous service; Outdoor motor is out of service after satisfying N1＜N0 and N2＜N0 and N3＜N0.
Above-mentioned t1 is 90, and S is 50; Suppose that the valve step of electric expansion valve before warning was 150 steps, the back electric expansion valve of then reporting to the police closed for 200 steps, closed fully extremely to guarantee it.
Referring to Fig. 3, in off-premises station 13 runnings, if N1＜N0 and N2＜N0 and N3＜N0, then off-premises station 13 each parts are normally carried out dependent instruction; Wherein, first magnetic valve 5, second magnetic valve 6 and the 3rd magnetic valve 7 all are in opening, and electric expansion valve 4 is regulated by control program.
In air-conditioner ventilation running, (be N1 >=N0 and/or N2 >=N0 and/or N3 >=N0), then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning, compressor 1 does not start, first magnetic valve 5, second magnetic valve 6 and the 3rd magnetic valve 7 equal no powers, and the state that keeps shut, simultaneously, electric expansion valve 4 increases the S step on former basis closes, and outdoor motor continues with the maximum speed continuous service; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In air-conditioner refrigerating operaton process,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning; The off-premises station control assembly sends instruction to compressor 1, electric expansion valve 4, outdoor motor, second magnetic valve 6, the 3rd magnetic valve 7 simultaneously, make compressor shutdown, electric expansion valve on former basis, increase the S step close, outdoor motor with maximum speed operation, the outage of second magnetic valve close, the 3rd magnetic valve cuts off the power supply and cuts out; T2 is after second, and the off-premises station control assembly sends instruction to first magnetic valve 5 closes its outage; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
In the air conditioner heat-production running,, then report to the police immediately if can not satisfy N1＜N0 and N2＜N0 and N3＜N0; During warning; The off-premises station control assembly sends instruction to compressor 1, electric expansion valve 4, outdoor motor, cross valve 2, second magnetic valve 6, the 3rd magnetic valve 7 simultaneously, make that compressor 1 is shut down, electric expansion valve 4 on former basis, increase the S step close, outdoor motor with maximum speed operation, cross valve 2 outages, 6 outages of second magnetic valve close, the 3rd magnetic valve 7 cuts off the power supply and cuts out; T2 is after second, and the off-premises station control assembly sends instruction to first magnetic valve 5 closes its outage; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.Above-mentioned t2 is 3.
In air-conditioner dehumidifying or heating and defrosting running, then report to the police immediately; During warning; The off-premises station control assembly sends instruction to compressor 1, electric expansion valve 4, outdoor motor, second magnetic valve 6, the 3rd magnetic valve 7 simultaneously, make compressor shutdown, electric expansion valve on former basis, increase the S step close, outdoor motor with maximum speed operation, the outage of second magnetic valve close, the 3rd magnetic valve cuts off the power supply and cuts out; T2 is after second, and the off-premises station control assembly sends instruction to first magnetic valve 5 closes its outage; After satisfying N1＜N0 and N2＜N0 and N3＜N0, outdoor motor is out of service.
Claims (3)
1. an air-conditioner that uses combustible refrigerant comprises off-premises station (13) and indoor set, it is characterized in that off-premises station (13) inner or near be provided with the concentration detector that is used to detect combustible refrigerant concentration more than.
2. according to the air-conditioner of the said use combustible refrigerant of claim 1, it is characterized in that said off-premises station (13) comprises compressor (1), off-premises station heat exchanger (3), outdoor motor and off-premises station control assembly; The blast pipe of compressor (1) is connected with cross valve (2) respectively with muffler; Cross valve (2) in addition two ends respectively with an end of off-premises station heat exchanger (3) and indoor set in an end of indoor set heat exchanger be connected, the other end of off-premises station heat exchanger (3) passes through throttle part and is connected with the other end of indoor set heat exchanger; Wherein, between said cross valve (2) and the said blast pipe, be connected with first magnetic valve (5), second magnetic valve (6) and the 3rd magnetic valve (7) between the said muffler and between the end of said off-premises station heat exchanger (3) respectively;
Said concentration detector is provided with three; Wherein, The first concentration detector (8) is configured near compressor (1) muffler and the blast pipe; The second concentration detector (9) is configured near the cross valve (2), and the 3rd concentration detector (10) is configured near being connected the pipeline between off-premises station heat exchanger (3) and the throttle part.
3. according to the air-conditioner of the said use combustible refrigerant of claim 2, it is characterized in that the pipeline that said indoor set heat exchanger is connected with cross valve (2) is provided with first stop valve (11); Said throttle part comprises electric expansion valve (4) and capillary; The pipeline that said throttle part is connected with the indoor set heat exchanger is provided with second stop valve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201720302U CN202119019U (en) | 2011-05-26 | 2011-05-26 | Air-conditioner capable of using flammable refrigeration agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201720302U CN202119019U (en) | 2011-05-26 | 2011-05-26 | Air-conditioner capable of using flammable refrigeration agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119019U true CN202119019U (en) | 2012-01-18 |
Family
ID=45460080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201720302U Expired - Lifetime CN202119019U (en) | 2011-05-26 | 2011-05-26 | Air-conditioner capable of using flammable refrigeration agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202119019U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226550A (en) * | 2011-05-26 | 2011-10-26 | 广东美的电器股份有限公司 | Air-conditioner for using flammable refrigeration agent and control method thereof |
| CN104101066A (en) * | 2014-07-04 | 2014-10-15 | 珠海格力电器股份有限公司 | Air conditioner protection system, control method thereof and air conditioner |
| CN104566864A (en) * | 2014-12-31 | 2015-04-29 | 广东美的制冷设备有限公司 | Air conditioner using combustible refrigerants and control method |
| CN104633976A (en) * | 2013-11-08 | 2015-05-20 | 三菱电机株式会社 | Refrigeration cycle apparatus,and production method and installation method therefor |
| US20160327303A1 (en) * | 2014-03-03 | 2016-11-10 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
-
2011
- 2011-05-26 CN CN2011201720302U patent/CN202119019U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226550A (en) * | 2011-05-26 | 2011-10-26 | 广东美的电器股份有限公司 | Air-conditioner for using flammable refrigeration agent and control method thereof |
| CN102226550B (en) * | 2011-05-26 | 2013-08-28 | 广东美的电器股份有限公司 | Air-conditioner for using flammable refrigeration agent and control method thereof |
| CN104633976A (en) * | 2013-11-08 | 2015-05-20 | 三菱电机株式会社 | Refrigeration cycle apparatus,and production method and installation method therefor |
| US10281182B2 (en) | 2013-11-08 | 2019-05-07 | Mitsubishi Electric Corporation | Refrigeration cycle apparatus, method of manufacturing the same, and method of installing the same |
| US20160327303A1 (en) * | 2014-03-03 | 2016-11-10 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
| US10422548B2 (en) * | 2014-03-03 | 2019-09-24 | Mitsubishi Electric Corporation | Air-conditioning apparatus with operability based on flammable refrigerant concentration information in outdoor unit |
| CN104101066A (en) * | 2014-07-04 | 2014-10-15 | 珠海格力电器股份有限公司 | Air conditioner protection system, control method thereof and air conditioner |
| CN104101066B (en) * | 2014-07-04 | 2017-01-04 | 珠海格力电器股份有限公司 | Air-conditioning protection system and control method, air-conditioner |
| CN104566864A (en) * | 2014-12-31 | 2015-04-29 | 广东美的制冷设备有限公司 | Air conditioner using combustible refrigerants and control method |
| CN104566864B (en) * | 2014-12-31 | 2017-12-12 | 广东美的制冷设备有限公司 | Use the air conditioner and control method of combustible refrigerant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102226550B (en) | Air-conditioner for using flammable refrigeration agent and control method thereof | |
| CN102269447B (en) | Air conditioner using combustible refrigerant, and control method of air conditioner | |
| CN102721115B (en) | Air conditioner and control method thereof | |
| CN202133041U (en) | Air conditioner system | |
| CN101737878B (en) | Air conditioner using combustible refrigerant and control method thereof | |
| CN103322641B (en) | Use the method for controlling security of flammable coolant air-conditioner | |
| CN202119019U (en) | Air-conditioner capable of using flammable refrigeration agent | |
| CN102213463B (en) | Air conditioner using combustible refrigerant and control method thereof | |
| CN202792404U (en) | Air conditioner and outdoor unit thereof | |
| EP2631570A2 (en) | Safe operation of space conditioning systems using flammable refrigerants | |
| CN104566864A (en) | Air conditioner using combustible refrigerants and control method | |
| CN203629162U (en) | Refrigerant-automatic-recovery type air-conditioning system | |
| CN102788404B (en) | Control method for preventing direct current variable frequency air conditioner from accidentally shutting down due to low voltage | |
| CN204730502U (en) | A kind of cryogenic refrigeration machine room air-conditioner | |
| CN103940157A (en) | Air-conditioning outdoor unit, air-conditioning system and shutdown method of air-conditioning system | |
| CN105485856A (en) | Air conditioning system and detection method of abnormity of air conditioning system in heating state | |
| CN104990173A (en) | Air conditioner, and fireproof control method, controller and air conditioner system thereof | |
| CN110486885B (en) | Air conditioner control method and system and air conditioner | |
| CN107062560A (en) | The coolant leakage protection device and method of air conditioner and air conditioner | |
| CN104329836A (en) | Refrigerant automatic recycling air conditioner system and control method thereof | |
| CN103940158A (en) | Air-conditioning outdoor unit, air-conditioning system and operation method of air-conditioning system | |
| CN203385088U (en) | Energy-saving yearly refrigeration air conditioner | |
| CN202188563U (en) | Air conditioner using a flammable secondary refrigerant | |
| CN204421288U (en) | Use the air-conditioner of combustible refrigerant | |
| CN203132194U (en) | Air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131209 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131209 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: Midea Group Co., Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120118 |
|
| CX01 | Expiry of patent term |