CN105805994B - The control method and control device of a kind of expansion valve for compressor - Google Patents
The control method and control device of a kind of expansion valve for compressor Download PDFInfo
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- CN105805994B CN105805994B CN201610260715.XA CN201610260715A CN105805994B CN 105805994 B CN105805994 B CN 105805994B CN 201610260715 A CN201610260715 A CN 201610260715A CN 105805994 B CN105805994 B CN 105805994B
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- expansion valve
- case
- aperture
- compressor
- controls
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to appliance fields, disclose a kind of control method and control device of the expansion valve for compressor, and the wherein control method includes：In the case where the compressor stops, the reason of compressor stops is obtained；And the reason of being stopped according to the compressor, controls the aperture of the expansion valve.It can so reduce the number that expansion valve is reset in the case where ensureing electric appliance normal operation, extend the service life of expansion valve.
Description
Technical field
The present invention relates to appliance fields, and in particular, to a kind of control method of expansion valve for compressor and control
Device.
Background technology
In the prior art, when compressor (for example, compressor of air conditioner) stops, expansion valve is (for example, electronic expansion
Valve) control be to change from the aperture before shutdown to cleared condition, reset and indicate electronic expansion valve controls being in off state,
In order to ensure electric expansion valve is closed, electric expansion valve can be controlled under normal conditions and is changed to ﹣ Y steps.However frequent clearing is again
Position is easy to increase the abrasion of electric expansion valve, causes electric expansion valve stuck, to shorten the use of electric expansion valve significantly
Service life.
Invention content
The object of the present invention is to provide a kind of control method and control device of the expansion valve for compressor, the controlling parties
Method and control device can be reduced the number that expansion valve is reset, extend expansion valve in the case where ensureing electric appliance normal operation
Service life.
To achieve the goals above, the present invention provides a kind of control method of the expansion valve for compressor, the controlling party
Method includes：In the case where the compressor stops, the reason of compressor stops is obtained；And stopped according to the compressor
Only the reason of, controls the aperture of the expansion valve.
Preferably, in the case of reaching set temperature the reason of the compressor stops for temperature, according to the compression
The reason of machine stops include the aperture that controls the expansion valve：It is more than the first pre- timing in the compressor continuous operating time
Between in the case of, control the expansion valve and change to standby aperture；And it is not more than institute in the compressor continuous operating time
In the case of stating for the first predetermined time, controls the expansion valve and change to default aperture, the default aperture is less than described standby
Aperture.
Preferably, the temperature is water temperature and/or environment temperature.
Preferably, in the case of shutdown for high pressure and/or exhaust protection the reason of the compressor stops, according to described
The reason of compressor stops include the aperture that controls the expansion valve：In the case where high pressure and/or exhaust protection are restored, control
The expansion valve is made to change to standby aperture.
Preferably, in the case where high pressure and/or exhaust protection are restored, the control method includes：Judge pre- second
Fix time the interior expansion valve clearing number whether be more than preset times；It is more than described pre- in the clearing number of the expansion valve
If in the case of number, controlling the expansion valve and changing to standby aperture；And it is less than in the clearing number of the expansion valve
In the case of the preset times, controls after the expansion valve is reset and change again to standby aperture.
Preferably, the control method further includes at least one of following：When high pressure and/or exhaust protection are shut down,
The expansion valve is controlled to change to maximum opening；And when after high pressure and/or exhaust protection are restored by the third predetermined time,
Judge whether the clearing number of the expansion valve within second predetermined time is more than the preset times.
Preferably, it is not that temperature reaches set temperature and high pressure and/or exhaust protection the reason of the compressor stops
In the case of shutdown, the aperture that the reason of being stopped according to the compressor controls the expansion valve includes：Control the expansion
Valve changes to standby aperture.
Preferably, it controls the expansion valve and changes to standby aperture and include：Judge the expansion within second scheduled time
Whether the clearing number of valve is more than preset times；In the case where the clearing number of the expansion valve is more than the preset times,
The expansion valve is controlled to change to standby aperture；And it is less than the feelings of the preset times in the clearing number of the expansion valve
Under condition, controls after the expansion valve is reset and change again to standby aperture.
Preferably, the control method further includes：In the case where the expansion valve is cleared, control counter adds 1；With
And in the case where complete machine run time reaches second predetermined time, control the counter O reset.
Correspondingly, the present invention also provides a kind of control device of the expansion valve for compressor, which includes：It obtains
Modulus block obtains the reason of compressor stops in the case where the compressor stops；And control module, it is used for root
The reason of stopping according to the compressor controls the aperture of the expansion valve.
Preferably, in the case of reaching set temperature the reason of the compressor stops for temperature, the control module
The reason of being stopped according to the compressor include come the aperture for controlling the expansion valve：It is big in the compressor continuous operating time
In the case of the first predetermined time, controls the expansion valve and change to standby aperture；And in the compressor continuous operation
In the case that time is not more than first predetermined time, controls the expansion valve and change to default aperture, the default aperture
Less than the standby aperture.
Preferably, in the case of shutdown for high pressure and/or exhaust protection the reason of the compressor stops, the control
The reason of module stops according to the compressor include come the aperture for controlling the expansion valve：It is extensive in high pressure and/or exhaust protection
In the case of multiple, control the expansion valve and change to standby aperture.
Preferably, in the case where high pressure and/or exhaust protection are restored, the control module is used for：Judge pre- second
Fix time the interior expansion valve clearing number whether be more than preset times；It is more than described pre- in the clearing number of the expansion valve
If in the case of number, controlling the expansion valve and changing to standby aperture；And it is less than in the clearing number of the expansion valve
In the case of the preset times, controls after the expansion valve is reset and change again to standby aperture.
Preferably, the control module is additionally operable to execute at least one of following：It is shut down in high pressure and/or exhaust protection
When, it controls the expansion valve and changes to maximum opening；And by the third predetermined time after high pressure and/or exhaust protection are restored
When, judge whether the clearing number of the expansion valve within second predetermined time is more than the preset times.
Preferably, it is not that temperature reaches set temperature and high pressure and/or exhaust protection the reason of the compressor stops
In the case of shutdown, the aperture that the reason of control module stops according to the compressor controls the expansion valve includes：
The expansion valve is controlled to change to standby aperture.
Preferably, the control module control expansion valve, which changes to standby aperture, includes：Judge in the second pre- timing
Whether the clearing number of the interior expansion valve is more than preset times；It it is more than described default time in the clearing number of the expansion valve
In the case of number, controls the expansion valve and change to standby aperture；And described in being less than in the clearing number of the expansion valve
In the case of preset times, controls after the expansion valve is reset and change again to standby aperture.
Preferably, the control device further includes counter, and the control module is additionally operable to：It is cleared in the expansion valve
In the case of, it controls the counter and adds 1；And in the case where complete machine run time reaches second predetermined time, control
Make the counter O reset.
Through the above technical solutions, the reason of being stopped according to the compressor controls the aperture of the expansion valve, it can
In the case where ensureing electric appliance normal operation, the number that expansion valve is reset is reduced, the service life of expansion valve is extended.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart according to the control method of the expansion valve provided by the present invention for compressor；
Fig. 2 is the flow of the control method of the expansion valve for compressor provided according to one embodiment of the present invention
Figure；And
Fig. 3 is the structural schematic diagram according to the control device of the expansion valve provided by the present invention for compressor.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Fig. 1 is flow chart of the basis provided by the present invention for the control method of the expansion valve of compressor, as shown in Figure 1,
Control method provided by the present invention for the expansion valve of compressor may include：At step 10, stop in the compressor
In the case of, obtain the reason of compressor stops；And at step 11, the reason of being stopped according to the compressor, is controlled
Make the aperture of the expansion valve.It can so reduce the number that expansion valve is reset in the case where ensureing electric appliance normal operation, prolong
The service life of expansion valve is grown.
The reason of compressor stops can be divided into：Temperature reaches set temperature, and the temperature can be water temperature and/or environment
Temperature；High pressure and/or exhaust protection are shut down；Other (such as artificial shutdown).Different controlling parties is taken for different reasons
Formula, to reduce the number of expansion valve clearing, to extend its service life.
In the case of reaching set temperature the reason of the compressor stops for temperature, it is contemplated that in compressor operating one
The lubricating oil of system is flow to after fixing time can just flow back into compressor, and it is predetermined to be more than first in the compressor continuous operating time
The feelings of time (first predetermined time can be arranged according to actual conditions, to ensure that lubricating oil can flow back into compressor substantially)
Under condition, controls the expansion valve and change to standby aperture；And it is not more than described first in the compressor continuous operating time
In the case of predetermined time, since parts of lubricating oil still remains in system, in order to which the liquid refrigerants when being again started up will be compared with
Few lubrication is brought into system, can be controlled the expansion valve and be changed to default aperture, and the default aperture is made to be less than institute
State standby aperture.
In the case of shutdown for high pressure and/or exhaust protection the reason of the compressor stops, in order to avoid system pressure
Power is higher and generates greater impact to expansion valve, and in the case where high pressure and/or exhaust protection are restored, it is relatively low that system is in pressure
State when control the expansion valve again and change to standby aperture.
In a period of time, if the clearing number of expansion valve is excessive, it will cause greatly to damage to expansion valve.Therefore exist
In the case that high pressure and/or exhaust protection restore, judge whether the clearing number of the expansion valve within second scheduled time surpasses
Cross preset times；In the case where the clearing number of the expansion valve is more than the preset times, controls the expansion valve and change
To standby aperture；And in the case where the clearing number of the expansion valve is less than the preset times, control the expansion
Valve changes again after resetting to standby aperture.
When high pressure and/or exhaust protection are shut down, the control method further includes at least one of following：It can control
The expansion valve changes to maximum opening, to accelerate system decompression；And in order to ensure when expansion valve is reset system be in it is low
Pressure condition judges the institute within second predetermined time when after high pressure and/or exhaust protection are restored by the third predetermined time
Whether the clearing number for stating expansion valve is more than the preset times.
It is not that temperature reaches set temperature and high pressure and/or the feelings of exhaust protection shutdown the reason of the compressor stops
Under condition, the aperture that the reason of being stopped according to the compressor controls the expansion valve may include：The expansion valve is controlled to change
Fade to standby aperture.In a period of time, if the clearing number of expansion valve is excessive, it will cause greatly to damage to expansion valve.
Therefore it may determine that whether the clearing number of the expansion valve within second scheduled time is more than preset times；In the expansion valve
Clearing number be more than the preset times in the case of, control the expansion valve and change to standby aperture；And described swollen
In the case that the clearing number of swollen valve is less than the preset times, controls to change again to standby after the expansion valve is reset and open
Degree.
The control method further includes：In the case where the expansion valve is cleared, control counter adds 1；And whole
In the case that machine run time reaches second predetermined time, the counter O reset is controlled, to ensure expansion valve pre-
Excessive clearing number is not will produce in section of fixing time.Second predetermined time can also be the time that complete machine runs and do not run
With.
The present invention is described in detail below with reference to Fig. 2, it is to be noted however that the present invention is not restricted to
This.
As shown in Fig. 2, during compressor operating, at step 201, whether detection compressor stops；Detecting pressure
After contracting machine stops, at step 202, judge whether shut down is caused by temperature reaches set temperature；If it is,
Step 203 place, judges whether the time of compressor continuous operation is more than A minutes；If the time of compressor continuous operation is more than A
Minute, then at step 205, control expansion valve changes from current aperture to standby aperture；If compressor continuous operation when
Between be not more than A minute, then at step 204, control expansion valve change from current aperture to default aperture, this preset opening ratio wait for
The small X steps of machine aperture, X can be configured as the case may be.
Be not due to temperature if shut down and reach caused by set temperature, at step 206, judge to shut down whether be
High pressure and/or exhaust protection are shut down；If it is, at step 207, control expansion valve, which changes from current aperture to maximum, to be opened
Degree；Then at step 208, judge whether high pressure and/or exhaust protection have been restored and passed through B minutes；If high pressure and/or row
Gas shielded has restored and has passed through B minutes, then at step 209, judges that expansion valve resets whether number is more than n times in C hours；Such as
It is more than n times that expansion valve, which resets number, in fruit C hours, then at step 210, control expansion valve changes from current aperture (maximum opening)
Standby aperture is faded to, is not reset therebetween；If expansion valve resets number and is less than n times in C hours, at step 211, control
Expansion valve changes after resetting to standby aperture；Then at step 212, counter adds 1；At step 213, the time reaches C
Hour, counter O reset.
It is shut down if shutdown is not high pressure and/or exhaust protection, goes to step 209 place, judge that expansion valve is clear in C hours
Whether zero degree number is more than n times；If in C hours expansion valve reset number be more than n times, at step 210, control expansion valve from
Current aperture changes to standby aperture, does not reset therebetween；If expansion valve resets number and is less than n times in C hours, in step
At 211, control expansion valve changes after resetting to standby aperture；Then at step 212, counter adds 1；At step 213,
Time reaches C hours, counter O reset.
Correspondingly, the present invention also provides a kind of control devices of the expansion valve for compressor, as shown in figure 3, of the invention
The control device of offer may include：Acquisition module 31 obtains the compressor and stops in the case where the compressor stops
The reason of；And control module 31, the aperture of the expansion valve is controlled the reason of for stopping according to the compressor.So
It can reduce the number that expansion valve is reset in the case where ensureing electric appliance normal operation, extend the service life of expansion valve.
In the case of reaching set temperature the reason of the compressor stops for temperature, it is contemplated that in compressor operating one
The lubricating oil of system is flow to after fixing time can just flow back into compressor, and the control module 32 is in the compressor continuous operation
Between be more than the first predetermined time in the case of, control the expansion valve and change to standby aperture；And it is continuous in the compressor
Run time be not more than first predetermined time in the case of, since parts of lubricating oil still remains in system, in order to
Liquid refrigerants brings less lubrication into system into when being again started up, and the control module 32 can control the expansion valve and change
To default aperture, the default aperture is less than the standby aperture.
In the case of shutdown for high pressure and/or exhaust protection the reason of the compressor stops, in order to avoid system pressure
Power is higher and generates greater impact to expansion valve, and in the case where high pressure and/or exhaust protection are restored, the control module 32 can
Changed to standby aperture with controlling the expansion valve.
In a period of time, if the clearing number of expansion valve is excessive, it will cause greatly to damage to expansion valve.Therefore exist
In the case that high pressure and/or exhaust protection restore, the control module 32 can be used for：Judge described within second scheduled time
Whether the clearing number of expansion valve is more than preset times；The case where the clearing number of the expansion valve is more than the preset times
Under, the control module 32 can control the expansion valve and change to standby aperture；And the clearing number in the expansion valve
In the case of being less than the preset times, the control module 32, which can control after the expansion valve is reset, to be changed again to standby
Aperture.
When high pressure and/or exhaust protection are shut down, the control module 32 is additionally operable to execute at least one of following：
When high pressure and/or exhaust protection are shut down, controls the expansion valve and change to maximum opening, to accelerate system decompression；And it is
Ensure that system be in low-pressure state when expansion valve is reset, by the third predetermined time after high pressure and/or exhaust protection recovery
When, judge whether the clearing number of the expansion valve within second predetermined time is more than the preset times.
It is not that temperature reaches set temperature and high pressure and/or the feelings of exhaust protection shutdown the reason of the compressor stops
Under condition, the aperture that the reason of control module 32 stops according to the compressor controls the expansion valve includes：Control institute
Expansion valve is stated to change to standby aperture.In a period of time, if the clearing number of expansion valve is excessive, it will cause pole to expansion valve
Big damage.Therefore the control module 32 may determine that whether the clearing number of the expansion valve within second scheduled time surpasses
Cross preset times；In the case where the clearing number of the expansion valve is more than the preset times, the control module 32 can be with
The expansion valve is controlled to change to standby aperture；And it is less than the feelings of the preset times in the clearing number of the expansion valve
Under condition, the control module 32, which can control after the expansion valve is reset, to be changed again to standby aperture.
The control device further includes counter, and the control module 32 can be also used for：It is cleared in the expansion valve
In the case of, it controls the counter and adds 1；And in the case where complete machine run time reaches second predetermined time, control
The counter O reset is made, to ensure that expansion valve not will produce excessive clearing number within a predetermined period of time.This is second pre-
Fix time can also be complete machine operation and time for not running and.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (15)
1. a kind of control method of expansion valve for compressor, which is characterized in that the control method includes：
In the case where the compressor stops, the reason of compressor stops is obtained；And
The reason of being stopped according to the compressor controls the aperture of the expansion valve,
Wherein, in the case of reaching set temperature the reason of the compressor stops for temperature, stopped according to the compressor
The reason of come the aperture that controls the expansion valve include：
In the case where the compressor continuous operating time was more than for the first predetermined time, controls the expansion valve and change to standby
Aperture；And
In the case where the compressor continuous operating time is not more than first predetermined time, controls the expansion valve and change
To default aperture, the default aperture is less than the standby aperture.
2. control method according to claim 1, which is characterized in that the temperature is water temperature and/or environment temperature.
3. control method according to claim 1, which is characterized in that the reason of the compressor stops for high pressure and/
Or in the case that exhaust protection is shut down, the aperture that the reason of being stopped according to the compressor controls the expansion valve includes：
In the case where high pressure and/or exhaust protection are restored, controls the expansion valve and change to standby aperture.
4. control method according to claim 3, which is characterized in that in the case where high pressure and/or exhaust protection are restored,
The control method includes：
Judge whether the clearing number of the expansion valve within second scheduled time is more than preset times；
In the case where the clearing number of the expansion valve is more than the preset times, controls the expansion valve and change to standby and open
Degree；And
In the case where the clearing number of the expansion valve is less than the preset times, controls after the expansion valve is reset and change again
Fade to standby aperture.
5. control method according to claim 4, which is characterized in that the control method further include it is following at least one
Person：
When high pressure and/or exhaust protection are shut down, controls the expansion valve and change to maximum opening；And
When after high pressure and/or exhaust protection are restored by the third predetermined time, judge described within second predetermined time
Whether the clearing number of expansion valve is more than the preset times.
6. control method according to claim 1, which is characterized in that the reason of the compressor stops be not that temperature reaches
The reason of protecting to set temperature and high pressure and/or exhaust in the case of shutting down, being stopped according to the compressor is described to control
The aperture of expansion valve includes：The expansion valve is controlled to change to standby aperture.
7. control method according to claim 6, which is characterized in that control the expansion valve and change to standby aperture packet
It includes：
Judge whether the clearing number of the expansion valve within second scheduled time is more than preset times；
In the case where the clearing number of the expansion valve is more than the preset times, controls the expansion valve and change to standby and open
Degree；And
In the case where the clearing number of the expansion valve is less than the preset times, controls after the expansion valve is reset and change again
Fade to standby aperture.
8. the control method according to claim 4 or 7, which is characterized in that the control method further includes：
In the case where the expansion valve is cleared, control counter adds 1；And
In the case where complete machine run time reaches second predetermined time, the counter O reset is controlled.
9. a kind of control device of expansion valve for compressor, which is characterized in that the control device includes：
Acquisition module obtains the reason of compressor stops in the case where the compressor stops；And
Control module controls the aperture of the expansion valve the reason of for stopping according to the compressor,
Wherein, in the case of reaching set temperature the reason of the compressor stops for temperature, the control module is according to institute
State the reason of compressor stops includes the aperture that controls the expansion valve：
In the case where the compressor continuous operating time was more than for the first predetermined time, controls the expansion valve and change to standby
Aperture；And
In the case where the compressor continuous operating time is not more than first predetermined time, controls the expansion valve and change
To default aperture, the default aperture is less than the standby aperture.
10. control device according to claim 9, which is characterized in that the reason of the compressor stops for high pressure and/
Or in the case that exhaust protection is shut down, the reason of control module stops according to the compressor, controls the expansion valve
Aperture includes：
In the case where high pressure and/or exhaust protection are restored, controls the expansion valve and change to standby aperture.
11. control device according to claim 10, which is characterized in that the case where high pressure and/or exhaust protection are restored
Under, the control module is used for：
Judge whether the clearing number of the expansion valve within second scheduled time is more than preset times；
In the case where the clearing number of the expansion valve is more than the preset times, controls the expansion valve and change to standby and open
Degree；And
In the case where the clearing number of the expansion valve is less than the preset times, controls after the expansion valve is reset and change again
Fade to standby aperture.
12. control device according to claim 11, which is characterized in that the control module is additionally operable in execution or less
At least one：
When high pressure and/or exhaust protection are shut down, controls the expansion valve and change to maximum opening；And
When after high pressure and/or exhaust protection are restored by the third predetermined time, judge described within second predetermined time
Whether the clearing number of expansion valve is more than the preset times.
13. control device according to claim 9, which is characterized in that the reason of the compressor stops be not temperature
In the case of reaching set temperature and high pressure and/or exhaust protection shutdown, the control module stops according to the compressor
Reason includes come the aperture for controlling the expansion valve：The expansion valve is controlled to change to standby aperture.
14. control device according to claim 13, which is characterized in that the control module controls the expansion valve and changes
Include to standby aperture：
Judge whether the clearing number of the expansion valve within second scheduled time is more than preset times；
In the case where the clearing number of the expansion valve is more than the preset times, controls the expansion valve and change to standby and open
Degree；And
In the case where the clearing number of the expansion valve is less than the preset times, controls after the expansion valve is reset and change again
Fade to standby aperture.
15. the control device according to claim 11 or 14, which is characterized in that the control device further includes counter,
The control module is additionally operable to：
In the case where the expansion valve is cleared, controls the counter and add 1；And
In the case where complete machine run time reaches second predetermined time, the counter O reset is controlled.
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| CN201610260715.XA CN105805994B (en) | 2016-04-25 | 2016-04-25 | The control method and control device of a kind of expansion valve for compressor |
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| CN201610260715.XA CN105805994B (en) | 2016-04-25 | 2016-04-25 | The control method and control device of a kind of expansion valve for compressor |
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| CN105805994B true CN105805994B (en) | 2018-09-07 |
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| CN106705512B (en) * | 2016-12-29 | 2019-04-23 | 青岛海尔空调器有限总公司 | A kind of control method of refrigeration system and the control method of air-conditioning |
| CN108507246A (en) * | 2018-03-30 | 2018-09-07 | 北京新能源汽车股份有限公司 | Control method and device of heat pump air conditioning system and electronic equipment |
| CN112443883B (en) * | 2019-08-28 | 2022-04-22 | 青岛海尔新能源电器有限公司 | Electronic expansion valve control method and device and heat pump unit |
| CN110542237B (en) * | 2019-09-12 | 2021-03-30 | 广东美的制冷设备有限公司 | Air conditioner, operation control method and device thereof and computer readable storage medium |
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