CN109855229A - It is segmented the method for controlling oil return and multi-line system of oil return - Google Patents
It is segmented the method for controlling oil return and multi-line system of oil return Download PDFInfo
- Publication number
- CN109855229A CN109855229A CN201910157206.8A CN201910157206A CN109855229A CN 109855229 A CN109855229 A CN 109855229A CN 201910157206 A CN201910157206 A CN 201910157206A CN 109855229 A CN109855229 A CN 109855229A
- Authority
- CN
- China
- Prior art keywords
- oil return
- working group
- line system
- indoor unit
- group
- 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.)
- Pending
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses the method for controlling oil return and multi-line system of segmentation oil return, method for controlling oil return includes: that the indoor unit in multi-line system is divided at least two working groups, it include at least one indoor unit in each working group, multi-line system individually controls each working group in oil return mode and carries out oil return.The present invention can effectively improve the oil return reliability of distal end indoor unit in multi-line system.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly to the method for controlling oil return and multi-line system of segmentation oil return.
Background technique
Lubricating oil in refrigeration system can be melted into refrigerant, in unit running process, as the circulation portions of refrigerant are shared in the benefit
Lubricating oil can be discharged in system pipeline together with refrigerant.Multi-line system is since its connecting line is longer, long-play
A large amount of lubricating oil can be stored in system pipeline in the process, if this parts of lubricating oil can not be in time back to meeting in compressor
Lead to compressor and is worn because of operation oil starvation.
Common multi-connected machine oil return control is relatively simple, i.e., enters oil return operation control after unit operation a period of time, lead to
Overcompression machine forces raising frequency to oil return running frequency, and refrigerant circulation and circulation rate in raising system will be by this method
Lubricating oil in system is brought back in oil or compressor.But this control method is for the refrigeration system of long union, high drop
The problem of oil return of system can not be fully solved, due to long union, the system of high drop due to its connecting line it is longer, in oil return
The lubricating oil of end unit is relatively difficult to that lubricating oil is brought back to oil or compression with current circuit in operational process
In machine.
Therefore, how to design the method for controlling oil return for improving oil return reliability and multi-line system is that industry is urgently to be resolved
Technical problem.
Summary of the invention
In order to solve the prior art there are the undesirable defect of distal end indoor unit oil return, the present invention proposes the oil return of segmentation oil return
Control method and multi-line system.
The technical solution adopted by the present invention is that design method for controlling oil return, comprising: draw the indoor unit in multi-line system
It is divided at least two working groups, includes at least one indoor unit in each working group, multi-line system is independent in oil return mode
It controls each working group and carries out oil return.
Preferably, the indoor unit in multi-line system is divided at least two working groups by mounting distance from far near, more
On-line system successively opens oil return since farthest working group in oil return mode.
Preferably, each indoor unit is equipped with the throttle valve for adjusting cold medium flux；It, should when oil return is opened by working group
The throttle valve of indoor unit is opened to maximum opening in working group；And/or when working group stops oil return, indoor unit in the working group
Throttle valve close to cold medium flux be 0.
Preferably, throttle valve is electric expansion valve.
Preferably, when oil return is opened by closer working group in two neighboring working group, farther away working group stops oil return.
Preferably, when oil return is opened by closer working group in two neighboring working group, farther away working group continues oil return.
Preferably, farther away working group is provided with preset interval time in two neighboring working group, and farther away working group is returned
Oil opens closer working group's progress oil return after running to preset interval time.
Preferably, working group remoter in all working group is provided with longer preset interval time.
Preferably, each indoor unit connects the main control module in multi-line system, the distance of mounting distance by connection
Judged according to the current signal strength in connection.
Preferably, each indoor unit connects the outdoor unit in multi-line system, the distance of mounting distance by connecting line
Judged according to the length of connecting line.
When nearest working group's oil return runs to preset time, the multi-line system exits oil return mode.
The invention also provides multi-line systems, use above-mentioned method for controlling oil return.
Specifically, multi-line system includes: main control module, outdoor unit, at least two indoor units connecting with outdoor unit.
Outdoor unit is equipped with refrigerant flowing supervisor, and each indoor unit flows branch pipe by refrigerant and is connected on refrigerant flowing supervisor.
Preferably, refrigerant flowing supervisor is equipped with the radiating module for cooling down to main control module.
Preferably, refrigerant flowing supervisor is equipped with the bending section of bending setting, and bending section is radiating module.
Preferably, the throttle part being also in series on refrigerant flowing supervisor between working group and outdoor unit.
Compared with prior art, the indoor unit in multi-line system is divided into multiple working groups by the present invention, and system is being returned
Each working group is individually controlled when oily mode and carries out oil return, even if system pipeline length can also be with Discrete control, for each working group
Suitable circuit is set, the reliability of indoor unit lubricating oil return in distal end in system is effectively improved.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Fig. 1 is the connection schematic diagram of multi-line system in the present invention.
Specific embodiment
As shown in Figure 1, method for controlling oil return proposed by the present invention is suitable for multi-line system, multi-line system has master control
Module, outdoor unit and at least two indoor units 8 connecting with outdoor unit, each indoor unit 8 connect outdoor unit by connecting line,
Outdoor unit includes compressor 1, oil eliminator 2, gas-liquid separator 3, outdoor heat exchanger 4 etc., and each indoor unit 8 is connected by connection
Connect main control module.The embodiments possible of connecting line are as follows: outdoor unit is equipped with refrigerant flowing supervisor, and each indoor unit 8 is equipped with
Refrigerant flows branch pipe, and refrigerant flowing branch pipe is connected on refrigerant flowing supervisor.
Specifically, method for controlling oil return includes that the indoor unit 8 in multi-line system is divided at least two working groups,
It include at least one indoor unit 8 in each working group, multi-line system individually controls each working group in oil return mode and carries out
Oil return, grouping carry out the bad problem of indoor unit oil return that oil return advantageously accounts in multi-line system different installation sites, mention
The reliability of high system oil return.
In a preferred embodiment, the indoor unit 8 in multi-line system is divided at least two by mounting distance from far near
Working group, multi-line system successively open oil return since farthest working group in oil return mode, realize distal end indoor unit
High-efficiency oil-return, guarantee the reliability of unit.Wherein, the distance of mounting distance is sentenced according to the current signal strength in connection
Disconnected, the intensity of current signal can receive the speed of current signal by main control module to calculate, and the more fast then intensity of speed is higher,
The more strong then indoor unit mounting distance of current signal is closer, and the more slow then intensity of on the contrary then speed is lower, and the current signal the weak then indoor
Machine mounting distance is remoter.Mounting distance distance can also be judged according to the length of connecting line, the more long then room of connecting line
Interior machine mounting distance is remoter, and the more short then indoor unit mounting distance of connecting line is closer.
There are two types of feasible programs for the executive mode of oil return, and one is closer working groups in two neighboring working group to open back
When oily, farther away working group stops oil return, i.e., is then turned on its closer working group after the completion of farther away working group's oil return, every time only
There is a working group in oil return operation, when nearest working group's oil return runs to preset time, in entire multi-line system
Indoor unit completes oil return, and multi-line system exits oil return mode；Another kind is closer working group in two neighboring working group
When opening oil return, farther away working group continues oil return, i.e., farther away working group can continue oil return operation, nearest work after opening
All working group is in oil return operation when group opens oil return, entire multi-joint when nearest work oil return runs to preset time
Indoor unit in machine system completes oil return.Preferably, farther away working group is provided with preset interval in two neighboring working group
Time, farther away working group's oil return open closer working group's progress oil return, all working group after running to preset interval time
In remoter working group be provided with longer preset interval time so that the indoor unit oil return of distal end is more filled in multi-line system
Point.
In a preferred embodiment, it is that each indoor unit 8 is equipped with adjusting refrigerant stream that the mode of oil return is opened or stopped in control
The throttle valve 7 of amount, refrigerant of indoor unit 8 flows on branch pipe where throttle valve 7 is connected on it, should when oil return is opened by working group
The throttle valve 7 of indoor unit 8 is opened to maximum opening in working group；When working group stops oil return, indoor unit 8 in the working group
It is 0 that throttle valve 7, which is closed to cold medium flux,.Throttle valve 7 is preferably electric expansion valve, can also have flow restriction control function using other
Valve member.
Illustrate oil return control mode in order to clearer, with the total installation n+1 platform of indoor unit 8, n-th is farthest interior
Machine, mounting distance are gradually reduced from n-th to the 1st, and the 1st is nearest indoor unit, three embodiments described in detail below.
Embodiment one
In system oil return operation, the indoor unit n-th of distal end, (n+1)th are divided into first working group, the 1st of proximal end is extremely
3rd divides the second working group into.The electric expansion valve 7 of indoor unit in the first working group is opened to maximum opening first, second
The electric expansion valve 7 of indoor unit is closed to 0pls in working group, and oil return runs about a1After minute, open indoor in the second working group
The electric expansion valve 7 of machine to maximum opening, oil return runs about b1After minute, system exits oil return operation control, and system is total at this time
Oil return runing time be a1+b 1, a1> b1> 0.
Embodiment two
In system oil return operation, the indoor unit n-th of distal end, (n+1)th are divided into first working group, the 1st of proximal end is extremely
3rd divides the second working group into.The electric expansion valve 7 of indoor unit in the first working group is opened to maximum opening first, second
The electric expansion valve 7 of indoor unit is closed to 0pls in working group, and oil return runs about a2After minute, close indoor in the first working group
The electric expansion valve 7 of machine in first farther out working group while electronic expansion valve of indoor unit, opens the second working group to 0pls
Middle electronic expansion valve of indoor unit 7 to maximum opening, oil return runs about b2After minute, system exits oil return operation control, is at this time
The oil return runing time for uniting total is a2+b 2, a2> b2> 0.
Embodiment three
In system oil return operation, the first working group is divided by indoor unit (n+1)th of distal end, n-th divides the second working group into,
The 1st to the 3rd of proximal end divides third working group into.The electric expansion valve 7 of indoor unit in the first working group is opened extremely first
The electric expansion valve 7 of indoor unit is closed to 0pls in maximum opening, the second working group and third working group, and oil return runs about a3Point
Zhong Hou；The electric expansion valve 7 of indoor unit in the first working group is closed to 0pls, while opening the electricity of indoor unit in the second working group
Sub- expansion valve 7 maintains electronic expansion valve of indoor unit 7 in third working group constant to 0pls, oil return runs about b to maximum opening3
After minute；The electric expansion valve 7 of indoor unit in the second working group is closed to 0pls, while opening indoor unit in third working group
Electric expansion valve 7 runs about c to maximum opening3After minute, system exits oil return operation control, at this time the total oil return fortune of system
The row time is a3+b 3+c3, a3> b3> c3> 0.
It should be noted that the value of above-mentioned a, b, c can design according to actual needs.
Further, multi-line system of the invention also has radiating module 5, by radiating module 5 in main control module
Frequency converter radiating and cooling, with the continual and steady operation of multi-line system, and effectively prolong the service life.In preferred embodiment
In, radiating module 5 is the bending section that setting is bent on refrigerant flowing supervisor, frequency converter of the bending section close to main control module, low temperature
Refrigerant, to the environment temperature reduction around frequency converter, effectively prevent frequency converter to overheat by bending section, also connects on refrigerant flowing supervisor
There is the throttle part 6 between working group and outdoor unit, to be depressured to the coolant throttle in refrigerant flowing supervisor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (16)
1. a kind of method for controlling oil return characterized by comprising the indoor unit in multi-line system is divided at least two works
Make group, includes at least one described indoor unit in each working group, the multi-line system is individually controlled in oil return mode
It makes each working group and carries out oil return.
2. method for controlling oil return as described in claim 1, which is characterized in that the indoor unit in the multi-line system is by installation
Distance is divided at least two working groups from far near, and the multi-line system is in oil return mode from farthest working group
Start successively to open oil return.
3. method for controlling oil return as claimed in claim 2, which is characterized in that each indoor unit, which is equipped with, adjusts refrigerant stream
The throttle valve of amount；
When oil return is opened by the working group, the throttle valve of indoor unit is opened to maximum opening in the working group；And/or when described
It is 0 that the throttle valve of indoor unit, which is closed to cold medium flux, when working group stops oil return, in the working group.
4. method for controlling oil return as claimed in claim 3, which is characterized in that the throttle valve is electric expansion valve.
5. method for controlling oil return as claimed in claim 2, which is characterized in that closer work in the two neighboring working group
When group opens oil return, farther away working group stops oil return.
6. method for controlling oil return as claimed in claim 2, which is characterized in that closer work in the two neighboring working group
When group opens oil return, farther away working group continues oil return.
7. method for controlling oil return as claimed in claim 2, which is characterized in that farther away work in the two neighboring working group
Group is provided with preset interval time, and farther away working group's oil return opens closer working group after running to the preset interval time
Carry out oil return.
8. method for controlling oil return as claimed in claim 7, which is characterized in that remoter working group is provided in all working group
Longer preset interval time.
9. method for controlling oil return as claimed in claim 2, which is characterized in that each indoor unit connects institute by connection
The main control module in multi-line system is stated, the distance of the mounting distance is sentenced according to the current signal strength in the connection
It is disconnected.
10. method for controlling oil return as claimed in claim 2, which is characterized in that each indoor unit is connected by connecting line
The outdoor unit in the multi-line system is connect, the distance of the mounting distance judges according to the length of the connecting line.
11. such as the described in any item method for controlling oil return of claim 2 to 9, which is characterized in that nearest working group's oil return operation
When to preset time, the multi-line system exits oil return mode.
12. a kind of multi-line system, which is characterized in that use method for controlling oil return as described in any one of claim 1 to 11.
13. multi-line system as claimed in claim 12 characterized by comprising main control module, outdoor unit and the room
At least two indoor units of outer machine connection；The outdoor unit is equipped with refrigerant flowing supervisor, and each indoor unit passes through refrigerant stream
Dynamic branch pipe is connected on the refrigerant flowing supervisor.
14. multi-line system as claimed in claim 13, which is characterized in that the refrigerant flowing supervisor is equipped with for institute
State the radiating module of main control module cooling.
15. multi-line system as claimed in claim 14, which is characterized in that the refrigerant flowing supervisor is equipped with bending setting
Bending section, the bending section be the radiating module.
16. multi-line system as claimed in claim 15, which is characterized in that be also in series with and be located on the refrigerant flowing supervisor
Throttle part between the working group and the outdoor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910157206.8A CN109855229A (en) | 2019-03-01 | 2019-03-01 | It is segmented the method for controlling oil return and multi-line system of oil return |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910157206.8A CN109855229A (en) | 2019-03-01 | 2019-03-01 | It is segmented the method for controlling oil return and multi-line system of oil return |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109855229A true CN109855229A (en) | 2019-06-07 |
Family
ID=66899586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910157206.8A Pending CN109855229A (en) | 2019-03-01 | 2019-03-01 | It is segmented the method for controlling oil return and multi-line system of oil return |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109855229A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887109A (en) * | 2019-12-04 | 2020-03-17 | 珠海格力电器股份有限公司 | Air conditioning system with variable scale and operation method thereof |
| CN110986257A (en) * | 2019-12-17 | 2020-04-10 | 珠海格力电器股份有限公司 | Multi-split system cleaning method and device and air conditioning equipment |
| CN111854112A (en) * | 2020-07-17 | 2020-10-30 | 广东美的暖通设备有限公司 | Air conditioning system, control method, and computer-readable storage medium |
| CN112361537A (en) * | 2020-11-23 | 2021-02-12 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
| CN113108419A (en) * | 2021-03-15 | 2021-07-13 | 珠海格力电器股份有限公司 | Control method of multi-split air conditioning system |
| CN113108445A (en) * | 2021-04-26 | 2021-07-13 | 广东美的暖通设备有限公司 | Oil return control method and device of multi-split air conditioning system |
| CN113623840A (en) * | 2021-08-12 | 2021-11-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07127930A (en) * | 1993-11-04 | 1995-05-19 | Kubota Corp | Heat pump device |
| JPH10288410A (en) * | 1997-04-14 | 1998-10-27 | Daikin Ind Ltd | Refrigerator |
| JP2006125762A (en) * | 2004-10-29 | 2006-05-18 | Mitsubishi Heavy Ind Ltd | Indoor unit, air conditioning device comprising the same, and its operating method |
| JP2006183979A (en) * | 2004-12-28 | 2006-07-13 | Mitsubishi Heavy Ind Ltd | Detection system of refrigerant pipe length and detection method of refrigerant pipe length |
| CN1808000A (en) * | 2006-02-17 | 2006-07-26 | 清华大学 | Multi-connected air conditioning unit with liquid pump to supply refrigerant |
| CN101162104A (en) * | 2006-10-11 | 2008-04-16 | 三菱重工业株式会社 | Air-conditioning apparatus |
| CN104748254A (en) * | 2015-03-31 | 2015-07-01 | 广东美的制冷设备有限公司 | Air conditioner, electric control box assembly thereof and assembly method for air conditioner outdoor unit |
| CN204902069U (en) * | 2015-07-21 | 2015-12-23 | Tcl空调器(中山)有限公司 | Dehumidifier |
| CN106247686A (en) * | 2016-08-16 | 2016-12-21 | 广东美的暖通设备有限公司 | The method for controlling oil return of air-conditioner, oil return control device and air-conditioner |
| CN107192043A (en) * | 2017-06-21 | 2017-09-22 | 青岛海信日立空调系统有限公司 | Frequency-variable air conditioner outdoor machine and its frequency-variable module cooling means and device, convertible frequency air-conditioner |
| CN108650789A (en) * | 2018-07-19 | 2018-10-12 | 珠海格力电器股份有限公司 | Circuit board assemblies, controller and electrical installation |
| CN109195414A (en) * | 2018-10-17 | 2019-01-11 | 珠海格力电器股份有限公司 | Air conditioner, electrical appliance kit and electrical appliance kit radiator |
| JP2019020080A (en) * | 2017-07-20 | 2019-02-07 | 三菱重工サーマルシステムズ株式会社 | Air conditioning device and operation method therefor |
| CN109357440A (en) * | 2018-10-26 | 2019-02-19 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine heating method for controlling oil return and multi-gang air-conditioner device |
-
2019
- 2019-03-01 CN CN201910157206.8A patent/CN109855229A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07127930A (en) * | 1993-11-04 | 1995-05-19 | Kubota Corp | Heat pump device |
| JPH10288410A (en) * | 1997-04-14 | 1998-10-27 | Daikin Ind Ltd | Refrigerator |
| JP2006125762A (en) * | 2004-10-29 | 2006-05-18 | Mitsubishi Heavy Ind Ltd | Indoor unit, air conditioning device comprising the same, and its operating method |
| JP2006183979A (en) * | 2004-12-28 | 2006-07-13 | Mitsubishi Heavy Ind Ltd | Detection system of refrigerant pipe length and detection method of refrigerant pipe length |
| CN1808000A (en) * | 2006-02-17 | 2006-07-26 | 清华大学 | Multi-connected air conditioning unit with liquid pump to supply refrigerant |
| CN101162104A (en) * | 2006-10-11 | 2008-04-16 | 三菱重工业株式会社 | Air-conditioning apparatus |
| CN104748254A (en) * | 2015-03-31 | 2015-07-01 | 广东美的制冷设备有限公司 | Air conditioner, electric control box assembly thereof and assembly method for air conditioner outdoor unit |
| CN204902069U (en) * | 2015-07-21 | 2015-12-23 | Tcl空调器(中山)有限公司 | Dehumidifier |
| CN106247686A (en) * | 2016-08-16 | 2016-12-21 | 广东美的暖通设备有限公司 | The method for controlling oil return of air-conditioner, oil return control device and air-conditioner |
| CN107192043A (en) * | 2017-06-21 | 2017-09-22 | 青岛海信日立空调系统有限公司 | Frequency-variable air conditioner outdoor machine and its frequency-variable module cooling means and device, convertible frequency air-conditioner |
| JP2019020080A (en) * | 2017-07-20 | 2019-02-07 | 三菱重工サーマルシステムズ株式会社 | Air conditioning device and operation method therefor |
| CN108650789A (en) * | 2018-07-19 | 2018-10-12 | 珠海格力电器股份有限公司 | Circuit board assemblies, controller and electrical installation |
| CN109195414A (en) * | 2018-10-17 | 2019-01-11 | 珠海格力电器股份有限公司 | Air conditioner, electrical appliance kit and electrical appliance kit radiator |
| CN109357440A (en) * | 2018-10-26 | 2019-02-19 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine heating method for controlling oil return and multi-gang air-conditioner device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887109A (en) * | 2019-12-04 | 2020-03-17 | 珠海格力电器股份有限公司 | Air conditioning system with variable scale and operation method thereof |
| CN110986257A (en) * | 2019-12-17 | 2020-04-10 | 珠海格力电器股份有限公司 | Multi-split system cleaning method and device and air conditioning equipment |
| CN111854112A (en) * | 2020-07-17 | 2020-10-30 | 广东美的暖通设备有限公司 | Air conditioning system, control method, and computer-readable storage medium |
| CN112361537A (en) * | 2020-11-23 | 2021-02-12 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
| CN112361537B (en) * | 2020-11-23 | 2021-10-15 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
| CN113108419A (en) * | 2021-03-15 | 2021-07-13 | 珠海格力电器股份有限公司 | Control method of multi-split air conditioning system |
| CN113108419B (en) * | 2021-03-15 | 2022-06-17 | 珠海格力电器股份有限公司 | Control method of multi-split air conditioning system |
| CN113108445A (en) * | 2021-04-26 | 2021-07-13 | 广东美的暖通设备有限公司 | Oil return control method and device of multi-split air conditioning system |
| CN113623840A (en) * | 2021-08-12 | 2021-11-09 | 珠海格力节能环保制冷技术研究中心有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109855229A (en) | It is segmented the method for controlling oil return and multi-line system of oil return | |
| EP3006845B1 (en) | Oil return method for multiple air conditioning unit in heating | |
| CN1201126C (en) | Cooler system with variable speed driver | |
| CN103293010B (en) | Method and device and system for detecting air conditioner coolants | |
| JP4013261B2 (en) | Refrigeration equipment | |
| EP1443286B1 (en) | Refrigerating equipment | |
| CN104676944A (en) | Air conditioning system and cold media adjusting method thereof | |
| EP2105686A2 (en) | Chiller unit, refrigeration system having chiller unit and air conditioner having chiller unit | |
| CN110857809A (en) | Air conditioner and oil return control method thereof | |
| KR100694915B1 (en) | Refrigeration cycle apparatus | |
| EP2233862A2 (en) | Air conditioner and energy equipment | |
| CN103807979A (en) | Multi-union variable frequency air conditioner based on micro-channel heat exchanger and control method thereof | |
| CN105588362A (en) | Multi-split air-conditioning system and control method thereof | |
| CN108954712A (en) | The control method and control system and air conditioner of air conditioner | |
| EP3358276A2 (en) | Air conditioning system | |
| CN103776119A (en) | Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof | |
| CN108006909A (en) | Control method for electronic expansion valve under multi-line system and its heating mode | |
| CN105157127A (en) | Cooling system and method for electric control unit of air conditioner | |
| CN105588223B (en) | A kind of outdoor unit, defrosting control system and method | |
| CN1566826A (en) | Air-conditioner with one outdoor set and multiple indoor sets and its control method | |
| CN104676856A (en) | Air conditioner and refrigeration control method thereof | |
| CN107621058A (en) | Indoor-unit cooling-medium control device and its control method, indoor set and air-conditioning system | |
| CN107120305A (en) | Air-conditioning equipment, cold oil system and its control method | |
| CN105546890A (en) | Air conditioner energy output regulating method and air conditioner | |
| CN107906790B (en) | Air conditioner oil return system and method and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210309 Address after: 519070 Building 9 (Science and technology building), 789 Jinji Road, Qianshan, Shenzhen, Guangdong Province Applicant after: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI Address before: 519000 Qianshan Golden Chicken West Road in Zhuhai, Guangdong Applicant before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
|
| TA01 | Transfer of patent application right | ||
| CB02 | Change of applicant information |
Address after: 519070 9 Building (Science and technology building) 789 Jinji Road, Qianshan, Zhuhai, Guangdong Applicant after: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI Address before: 519070 Building 9 (Science and technology building), 789 Jinji Road, Qianshan, Shenzhen, Guangdong Province Applicant before: GREE GREEN REFRIGERATION TECHNOLOGY CENTER Co.,Ltd. OF ZHUHAI |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190607 |
|
| RJ01 | Rejection of invention patent application after publication |