CN108692425A - Air conditioner defrosting control method - Google Patents
Air conditioner defrosting control method Download PDFInfo
- Publication number
- CN108692425A CN108692425A CN201810558876.6A CN201810558876A CN108692425A CN 108692425 A CN108692425 A CN 108692425A CN 201810558876 A CN201810558876 A CN 201810558876A CN 108692425 A CN108692425 A CN 108692425A
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- Prior art keywords
- air conditioner
- defrosting
- consumption power
- control method
- accumulative
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- 238000010257 thawing Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to air conditioner technical fields, and in particular to a kind of air conditioner defrosting control method.Room temperature fluctuation is excessive when defrosting in order to prevent, and defrosting control method of the invention includes the following steps:Since air conditioner booting after for the first time into defrosting mode, in real time calculate air conditioner accumulated consumption power WIt is accumulative;Compare the accumulated consumption power WIt is accumulativeWith default consumption power W, judged whether that air conditioner is made to be again introduced into defrosting mode according to comparison result.The present invention can more accurately judge that air conditioner enters the opportunity of defrosting mode by regarding default consumption power W as benchmark, avoid the phenomenon that frequently defrosts.And the influence to indoor temperature during defrosting can be reduced to the full extent according to the accumulated consumption power of air conditioner, make the fluctuation that indoor temperature is not in larger.
Description
Technical field
The invention belongs to air conditioner technical fields, and in particular to a kind of air conditioner defrosting control method.
Background technology
Air conditioner as a kind of equipment that can adjust indoor environment temperature, its working principle is that:It is being followed by refrigerant
Between endless tube road by the state of high voltage/low voltage/gaseous state/liquid convert make indoor environment temperature reduce or increase, i.e., from
From the perspective of indoor unit, air conditioner is in refrigeration or heating condition.When air conditioner heat-production is run, in certain humidity item
If outdoor coil temperature is too low to lead to frosting situation under part, and outdoor coil pipe used frosting can cause the heat exchange of outdoor heat exchanger to be imitated
Rate reduces, and influences the heating effect of air conditioner, reduces the comfort of indoor environment, influence user experience.Therefore, at air conditioner
In the case of heating condition, the outdoor coil pipe used progress to air conditioner is needed effectively to defrost in time.
Existing domestic air conditioner is in running heating operations, if outside humidity is larger, reaches the condition of frosting, outdoor
Chance frosting, and frosting directly affects be exactly air conditioner operation power, i.e., when outer machine is there are when frosting, the operation of air conditioner
Power reduces, and causes indoor heating amount to reduce, directly affects indoor temperature.Existing air conditioner is usually to utilize run time
+ outdoor coil temperature goes to judge whether to enter defrosting, but this mode can not directly embody the variation of indoor temperature, very
Active influence user impression is indoor temperature.
Based on this, spy proposes the present invention.
Invention content
In order to solve the above problem in the prior art, room temperature fluctuation is excessive when defrosting in order to prevent, and the present invention carries
A kind of air conditioner defrosting control method is gone out, the defrosting control method includes the following steps:After air conditioner booting for the first time
Start into defrosting mode, calculates the accumulated consumption power W of air conditioner in real timeIt is accumulative;Compare the accumulated consumption power WIt is accumulativeWith it is pre-
If consuming power W, judged whether that air conditioner is made to be again introduced into defrosting mode according to comparison result.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " the accumulated consumption power WIt is accumulativeWith it is pre-
If consumption power W, judged whether that air conditioner is made to be again introduced into defrosting mode according to comparison result " the step of include:If 0.9W
≤WIt is accumulative< W then reduce compressor operating frequency, continue heating operation.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, if 0.9W≤WIt is accumulative< W, then by compressor
Running frequency reduces by 20%.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " the accumulated consumption power W it is accumulative with
Default consumption power W, judges whether that air conditioner is made to be again introduced into defrosting mode according to comparison result " the step of include:If WIt is accumulative
>=W, then make air conditioner be again introduced into defrosting mode.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the default consumption power W passes through with lower section
Formula determines:It is set into the Rule of judgment of defrosting;When meeting the Rule of judgment, air conditioner is made to enter defrosting mode;It calculates
Air conditioner is in the adjacent accumulated consumption power W entered twice between defrosting moden;Calculate multiple accumulated consumption power WnBe averaged
Value W, using the W as default consumption power.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the step of " Rule of judgment for being set into defrosting "
Suddenly include:The condition for making air conditioner enter defrosting mode is set according to the temperature of outdoor unit coil pipe.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " multiple accumulated consumption power W are being calculatedn's
In the step of average value W, using the W as default consumption power ", " multiple accumulated consumption power Wn" include at least W1,
W2,W3。
In the preferred embodiment of above-mentioned air conditioner defrosting control method, " enters for the first time after air conditioner booting and remove
White pattern starts, and calculates the accumulated consumption power W of air conditioner in real timeIt is accumulative" the step of in, air conditioner booting after first enter defrosting
The time of pattern is preset time.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the preset time is true according to the following steps
It is fixed:Obtain the ambient temperature and humidity value of the type and the air conditioner application scenarios of air conditioner;According to the machine of air conditioner
Type, the ambient temperature of application scenarios and humidity value enter defrosting mode for the first time after obtaining air conditioner booting by experiment
Time.
In the preferred embodiment of above-mentioned air conditioner defrosting control method, the defrosting control method further includes:When full
When foot enters the condition of defrosting mode, defrosted by four-way valve commutation;Wherein, the time of each run defrosting mode is pre-
The set time first set
The accumulated consumption power W that the present invention passes through calculating air conditionerIt is accumulative, and be compared with default consumption power W, to
Judge the accumulated consumption power W of air conditionerIt is accumulativeWhether the degree that needs again defrost is reached.Using default consumption power W as
Benchmark can more accurately judge that air conditioner enters the opportunity of defrosting mode, avoid the phenomenon that frequently defrosts.And according to air-conditioning
The accumulated consumption power of device can reduce influence to indoor temperature during defrosting to the full extent, make indoor temperature will not
There is larger fluctuation.
Description of the drawings
Fig. 1 is the broad flow diagram of the air conditioner defrosting control method of the present invention.
Specific implementation mode
To keep the embodiment of the present invention, technical solution and advantage more obvious, below in conjunction with attached drawing to the skill of the present invention
Art scheme is clearly and completely described, it is clear that and the embodiment described is a part of the embodiment of the present invention, rather than all
Embodiment.It will be apparent to a skilled person that these embodiments are used only for explaining the technical principle of the present invention, and
It is not intended to be limiting protection scope of the present invention.
As shown in Figure 1, the air conditioner defrosting control method of the present invention includes the following steps:S110, from air conditioner booting after
Start for the first time into defrosting mode, calculates the accumulated consumption power W of air conditioner in real timeIt is accumulative;S120, compare accumulated consumption power
WIt is accumulativeWith default consumption power W, judged whether that air conditioner is made to be again introduced into defrosting mode according to comparison result.People in the art
For member, it is understood that air conditioner is from defrosting is entered to defrosting is entered back into next time as a cycle of operation, which includes removing
Frost operation and heating operation, if air conditioner defrosts on appropriate opportunity every time, in a cycle of operation of air conditioner
Accumulated consumption power may be considered fixed, i.e., accumulated consumption power of the air conditioner in a cycle of operation is default consumption work(
Rate W.Therefore, since air conditioner booting after for the first time into defrosting mode, pass through calculate air conditioner accumulated consumption power
WIt is accumulative, compare WIt is accumulativeWith the value of W can accurately judge whether that air conditioner is made to be again introduced into defrosting mode.
As an example, can be determined in the following manner about default consumption power W:It is set into the judgement of defrosting first
Condition such as sets the condition for making air conditioner enter defrosting mode according to the temperature of outdoor unit coil pipe.When meeting Rule of judgment,
So that air conditioner is entered defrosting mode, then calculates the accumulated consumption power W of air conditionern, when meeting Rule of judgment again, will work as
The accumulated consumption power W of preceding calculatingnSave as W1;Then since air conditioner enters defrosting mode, the tired of air conditioner is recalculated
Meter consumption power Wn, when meeting Rule of judgment again, the accumulated consumption power W that will currently calculatenSave as W2;Class successively
Air conditioner can be calculated in the adjacent accumulated consumption power W entered twice between defrosting mode by pushing away1,W2,W3…Wn;Then it calculates
Accumulated consumption power W1,W2,W3…WnAverage value W, average value Q is default consumption power.
It will be appreciated to those of skill in the art that the accumulated consumption power of air conditioner can by way of integral meter
It calculates, no longer detailed calculation is illustrated herein.Obtain multigroup air conditioner in each cycle of operation (air-conditioning by experiment
Device is to enter defrosting to defrosting is entered back into next time be a cycle of operation) accumulated consumption power, the data tested get over
At most default consumption power W is more accurate.In addition, the Rule of judgment about the defrosting set during the test can be selected neatly
With arbitrary rational Rule of judgment, these are without departure from protection scope of the present invention.
In the step s 120, as 0.9W≤WIt is accumulativeWhen < W, compressor operating frequency can be reduced at this time, continue heating fortune
Row, such as compressor operating frequency is reduced by 20%, the time into defrosting can be delayed.Work as WIt is accumulative>=W, illustrates air conditioner
Accumulated consumption power has reached default consumption power W, you can to defrost, so that air conditioner is again introduced into defrosting mode at this time.
It should be noted that in step s 110, entering the time of defrosting mode after air conditioner booting for the first time can be
Preset time.Such as by designer according to the type of air conditioner and the ambient temperature and humidity of air conditioner application scenarios
Then value obtains the time for entering defrosting mode after air conditioner is switched on for the first time by experiment.For example, air conditioner is made to run
In target environment, the frosting situation of air conditioner is observed, then record enters the time of defrosting and the type of corresponding air conditioner
Number, the data of ambient temperature and humidity value, can finally determine that air conditioner exists by carrying out the data that multigroup experiment obtains
Enter the time of defrosting after booting for the first time.Those skilled in the art can also neatly select other rational test methods with
Enter the time defrosted for the first time after obtaining air conditioner booting, is no longer described in detail herein.
As an example, the air conditioner defrosting control method of the present invention, which uses, shuts down Defrost mode, i.e., when satisfaction enters defrosting
When the condition of pattern, defrosted by four-way valve commutation.The time defrosted every time is set as the set time.Due in the defrosting
Under pattern, for air conditioner without heating, air conditioner does not consume power at this time, therefore can be after first time defrosting mode again
Start the accumulated consumption power W of calculating air conditionerIt is accumulative.It will be readily appreciated by those skilled in the art that in this mode, due to removing
Accumulated consumption power under white pattern is 0, therefore even if the accumulative consumption work(of air conditioner is just calculated since entering defrosting mode
Rate QIt is accumulative, judging result will not be influenced.
As an example, if the air conditioner defrosting control method of the present invention using not shutting down Defrost mode, i.e., ought meet into
When entering the condition of defrosting mode, opens bypass line and defrost, is i.e. air conditioner utilizes side while being heated to interior
It defrosts to outdoor unit on siphunculus road.At this time due in the air conditioner still heating capacity of some in defrost mode, i.e., can
A part of power is consumed, therefore the accumulated consumption power W of air conditioner can be calculated when first time defrosting mode startsIt is accumulative.Ability
Field technique personnel are not it is understood that if consider air conditioner consumption under defrosting mode when determining default consumption power W
Power can also start calculating the accumulative of air conditioner again after defrosting mode and disappear then when using Defrost mode is not shut down
Wasted work rate WIt is accumulative。
In conclusion accumulated consumption power W of the present invention by calculating air conditionerIt is accumulative, and carried out with default consumption power W
Compare, to judge the accumulated consumption power W of air conditionerIt is accumulativeWhether the degree that needs again defrost is reached.By default consumption
Power W can more accurately judge that air conditioner enters the opportunity of defrosting mode as benchmark, avoid the phenomenon that frequently defrosts.And
The influence to indoor temperature during defrosting can be reduced to the full extent according to the accumulated consumption power of air conditioner, make interior
Temperature is not in larger fluctuation.
So far, it has been combined preferred embodiment shown in the drawings and describes technical scheme of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific implementation modes.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make the relevant technologies feature equivalent change or replacement, these
Technical solution after change or replacement is fallen within protection scope of the present invention.
Claims (10)
1. a kind of air conditioner defrosting control method, which is characterized in that the defrosting control method includes the following steps:
Since air conditioner booting after for the first time into defrosting mode, in real time calculate air conditioner accumulated consumption power WIt is accumulative;
Compare the accumulated consumption power WIt is accumulativeWith default consumption power W, according to comparison result judge whether to make air conditioner again into
Enter defrosting mode.
2. air conditioner defrosting control method according to claim 1, which is characterized in that " the accumulated consumption power
WIt is accumulativeWith default consumption power W, judged whether that air conditioner is made to be again introduced into defrosting mode according to comparison result " the step of include:
If 0.9W≤WIt is accumulative< W then reduce compressor operating frequency, continue heating operation.
3. according to the air conditioner defrosting control method described in claim 2, which is characterized in that if 0.9W≤WIt is accumulative< W, then will pressure
Contracting machine running frequency reduces by 20%.
4. air conditioner defrosting control method according to claim 1, which is characterized in that " the accumulated consumption power
WIt is accumulativeWith default consumption power W, judged whether that air conditioner is made to be again introduced into defrosting mode according to comparison result " the step of include:
If WIt is accumulative>=W, then make air conditioner be again introduced into defrosting mode.
5. air conditioner defrosting control method according to claim 1, which is characterized in that the default consumption power W passes through
Following manner determines:
It is set into the Rule of judgment of defrosting;
When meeting the Rule of judgment, air conditioner is made to enter defrosting mode;
Air conditioner is calculated in the adjacent accumulated consumption power W entered twice between defrosting moden;
Calculate multiple accumulated consumption power WnAverage value W, using the W as default consumption power.
6. air conditioner defrosting control method according to claim 5, which is characterized in that " be set into the judgement item of defrosting
The step of part " includes:
The condition for making air conditioner enter defrosting mode is set according to the temperature of outdoor unit coil pipe.
7. air conditioner defrosting control method according to claim 5, which is characterized in that " calculating multiple accumulative consumption work(
Rate WnAverage value W, using the W as default consumption power " the step of in, " multiple accumulated consumption power Wn" at least wrap
Include W1,W2,W3。
8. air conditioner defrosting control method according to claim 1, which is characterized in that " after air conditioner booting for the first time
Start into defrosting mode, calculates the accumulated consumption power W of air conditioner in real timeIt is accumulative" the step of in, air conditioner booting after first into
The time for entering defrosting mode is preset time.
9. air conditioner defrosting control method according to claim 8, which is characterized in that the preset time is according to following step
It is rapid to determine:
Obtain the ambient temperature and humidity value of the type and the air conditioner application scenarios of air conditioner;
It is obtained the after air conditioner booting by experiment according to the type of air conditioner, the ambient temperature of application scenarios and humidity value
The primary time for entering defrosting mode.
10. air conditioner defrosting control method according to any one of claim 1 to 9, which is characterized in that the defrosting control
Method processed further includes:
When meeting into the condition of defrosting mode, defrosted by four-way valve commutation;
Wherein, the time of each run defrosting mode is the preset set time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810558876.6A CN108692425B (en) | 2018-06-01 | 2018-06-01 | Defrosting control method for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810558876.6A CN108692425B (en) | 2018-06-01 | 2018-06-01 | Defrosting control method for air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108692425A true CN108692425A (en) | 2018-10-23 |
| CN108692425B CN108692425B (en) | 2020-11-27 |
Family
ID=63849471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810558876.6A Active CN108692425B (en) | 2018-06-01 | 2018-06-01 | Defrosting control method for air conditioner |
Country Status (1)
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| CN (1) | CN108692425B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736219A (en) * | 2019-09-20 | 2020-01-31 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
| WO2020224502A1 (en) * | 2019-05-06 | 2020-11-12 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner defrosting, and air conditioner |
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| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
| CN108168028A (en) * | 2018-01-04 | 2018-06-15 | 芜湖美智空调设备有限公司 | Method, mobile air conditioner and the storage medium of mobile air conditioner refrigeration defrosting |
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| JPS60138348A (en) * | 1983-12-26 | 1985-07-23 | Matsushita Electric Ind Co Ltd | Method of controlling defrosting of air conditioner |
| US6047554A (en) * | 1998-11-20 | 2000-04-11 | Lg Electronics Inc. | Optimum defrosting cycle control method for inverter refrigerator |
| CN101520272A (en) * | 2008-02-29 | 2009-09-02 | 三洋电机株式会社 | Equipment control system, control device and control program |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020224502A1 (en) * | 2019-05-06 | 2020-11-12 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner defrosting, and air conditioner |
| CN110736219A (en) * | 2019-09-20 | 2020-01-31 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
| CN110736219B (en) * | 2019-09-20 | 2022-04-19 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108692425B (en) | 2020-11-27 |
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