CN1146003A - Apparatus of air conditioner and control method thereof - Google Patents
Apparatus of air conditioner and control method thereof Download PDFInfo
- Publication number
- CN1146003A CN1146003A CN96102367A CN96102367A CN1146003A CN 1146003 A CN1146003 A CN 1146003A CN 96102367 A CN96102367 A CN 96102367A CN 96102367 A CN96102367 A CN 96102367A CN 1146003 A CN1146003 A CN 1146003A
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- indoor
- heat exchanger
- mentioned
- air conditioner
- temperature
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- 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
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention is a defrosting device and control means of the air-conditioning, An air conditioner comprises a room temperature sensing means for sensing a room temperature changing during a cooling operation, a control means for judging whether an indoor heat exchanger freezes or not from the room temperature sensed by the room temperature sensing means and controlling a cooling operation from the result of the decision, a compressor driving means for controlling a compressor to be driven to carry out a defrosting operation under the control of the control means and an indoor fan motor driving means for controlling an indoor fan to be driven to carry out a defrosting operation.
Description
The present invention relates to when the cooling operation of air conditioner, judge that according to the indoor temperature that changes whether indoor heat exchanger freezes, and is controlled the defroster and the control method thereof of the air conditioner of cooling operation by judged result.
Usually, the air conditioner of both cooling and heating heat running the time, shown in the dotted line (→) of Fig. 1, open and close under the state of directions adjusting cross valve 51 by not shown control device, make cold-producing medium according to compressor 61 → cross valve 51 → indoor heat exchanger 52 → expansion valve 53 → heat sequential loop with expansion valve 54 → indoor heat exchanger 55 → cross valve 51 → compressor 61.
On the other hand, when cooling operation, shown in the solid line (→) of Fig. 1, make the sequential loop of cold-producing medium according to compressor 61 → cross valve 51 → outdoor heat exchanger 55 → check valve 56 → expansion valve 53 → indoor heat exchanger 52 → cross valve 51 → compressor 61.
As mentioned above, when air conditioner carries out cooling operation, be sent to indoor air by the driving of indoor fan 81 and carried out heat exchange by evaporation latent heat with the cold-producing medium of indoor heat exchanger 52, be cooled back row to indoor, but this moment, therefore cold air and frosting on above-mentioned indoor heat exchanger 52, owing to the frost of forming like this along with the increase of time is thickeied, thereby the grand low heat-exchange capacity of above-mentioned indoor heat exchanger 52, the problem of consumption have again both been existed because the reduction of this refrigerating efficiency increases electric power.
In addition, owing on above-mentioned indoor heat exchanger 52, tied frost, thereby exist indoor heat exchanger 52 appearance to freeze phenomenon and cause the problem that machine damages.
Thereby, in air conditioner in the past, for head it off, when the cooling operation of above-mentioned air conditioner, if the pipe arrangement temperature of the indoor heat exchanger 52 that changes is continuing 6 minutes below 0 ℃, then above-mentioned control device is judging above-mentioned indoor heat exchanger 52 to produce ice-formation conditions when stopping cooling operation, changes at control cross valve 51 under the state of refrigerant flow paths air conditioner switched to heat running.
Thus, make cold-producing medium according to compressor 61 → cross valve 51 → indoor heat converter 52 → expansion valve 53 → heat freeze cycle by formation, be used as the defrosting drive manner of the frost of removing on the indoor heat exchanger 52 with the sequential loop of expansion valve 54 → outdoor heat exchanger 55 → cross valve 51 → compressor 61.
As concrete technical application, the aircondition of the open clear 62-11684 of the communique number record of Japan Patent is arranged.
Above-mentioned aircondition is being detected the pipe arrangement temperature by the temperature sensor on the pipe arrangement that is installed on outdoor heat exchanger, and when control device transmits this detected value, is heated and elapsed time when defrosting by timer accumulative total.Under state like this, judge whether from heating after running switching to defrosting running according to pipe arrangement temperature and defrosting maximum duration by control device, produce when switching according to its judged result again, according to the indoor temperature before the defrosting with the variation decision defrosting intermission of the indoor temperature after beginning to defrost several minutes with control signal.
But, in above-mentioned defrosting drive manner in the past, when the pipe arrangement temperature sensor of the pipe arrangement temperature that detects indoor heat exchanger or outdoor heat exchanger is substandard products or has under the unusual situation, owing to can not correctly detect the pipe arrangement temperature, thereby have and to grasp the problem whether indoor heat exchanger or outdoor heat exchanger freeze.
In addition, not only exist and be difficult to above-mentioned pipe arrangement temperature sensor is installed on indoor heat exchanger or the outdoor heat exchanger, but also exist because the problem that use pipe arrangement temperature sensor increases manufacturing price.
The present invention proposes in order to solve above-mentioned variety of problems, the object of the present invention is to provide a kind of when the cooling operation of air conditioner, judge that according to the indoor temperature that changes whether indoor heat exchanger freezes, and controls the defroster and the control method thereof of the air conditioner of cooling operation according to its result.
To achieve these goals, be characterised in that in air conditioner according to the defroster of air conditioner of the present invention and be provided with: the indoor temperature checkout gear that detects the indoor temperature of change detected when cooling operation; According to judging that by the detected indoor temperature of above-mentioned indoor temperature checkout gear whether indoor heat exchanger freezes, judged result is controlled the control device of cooling operation thus; According to the control of this control device, the compressor drive apparatus that control drive compression machine defrosts and turns round; According to the control of this control device, the indoor fan motor drive unit that control drive chamber internal fan defrosts and turns round.
In addition, the defrosting control method according to air conditioner of the present invention is characterised in that to have following steps: the indoor temperature of the indoor temperature of change detected detects step when cooling operation; Judge the defrosting determining step whether indoor heat exchanger freezes according to above-mentioned detected indoor temperature; In this defrosting discriminating step, when the defrosting running step of differentiating under the icing situation of indoor heat exchanger, remove the defrosting running of tying the frost on above-mentioned indoor heat exchanger; When above-mentioned defrosting running, the indoor temperature of change detected judges that the defrosting whether frost of above-mentioned indoor heat exchanger knot is removed removes discriminating step; Remove in the discriminating step in this defrosting,, then carry out the cooling operation step of cooling operation once more if the frosting of differentiating on indoor heat exchanger is removed.
Fig. 1 is the cold circular chart that heats of general air conditioner.
Fig. 2 is the controlling party block diagram of the defroster of air conditioner according to an embodiment of the invention.
Fig. 3 A, 3B are the flow charts according to the defrosting control action order of air conditioner of the present invention.
Below, describe one embodiment of the invention in detail according to accompanying drawing.
As shown in Figure 1, when air conditioner heats, the cold-producing medium that is compressed into the gaseous state of high pressure in compressor 61 flow in the indoor heat converter 52 by cross valve 51, in above-mentioned indoor heat converter 52, to become warm wind by the air heat exchange that indoor net fan 81 is carried, at this moment, this temperature wind is blown into indoor heating.
Afterwards, the cold-producing medium limit that has been liquefied in above-mentioned indoor heat exchanger 52 is by expansion valve 53 and heat and flow into outdoor heat exchanger 55 after being decompressed to the cold-producing medium of low-temp low-pressure with expansion valve 54 limits.
Thereby, in above-mentioned indoor heat exchanger 55, the cold-producing medium of above-mentioned low-temp low-pressure is after carrying out heat exchange and convert the gas refrigerant of low-temp low-pressure to the air of being carried by outdoor fan 71, flow into once more in the above-mentioned compressor 61 by cross valve 51, shown in the dotted line (→) of Fig. 1, the freeze cycle that forms is repeatedly carried out indoor heating.
On the contrary, when the refrigeration of air conditioner, flow into outdoor heat exchanger 55 if in compressor 61, be compressed into the cold-producing medium of the gaseous state of HTHP by cross valve 51, then in outdoor heat exchanger 55, the gas refrigerant of above-mentioned HTHP carries out forced condensation with the air of being carried by outdoor fan 71 and liquefies.
So the liquid refrigerant limit of the low-temp low-pressure after the above-mentioned liquefaction flows into indoor heat exchanger 52 be depressurized to the atomized refrigerant of low-temp low-pressure by expansion valve 53 limits through check valve 56 after.
Thereby, in indoor heat exchanger 52, the evaporation gasification of the vaporific attitude cold-producing medium limit of above-mentioned low-temp low-pressure, limit are captured heat and made the room air cooling from the air of being carried by indoor net fan 81 after, this cooled air (cold wind) is transported to the indoor room cooling of carrying out.At this moment, the gas refrigerant of the low-temp low-pressure after being cooled in indoor heat exchanger 52 is sucked compressor 61 once more, and shown in the solid line (→) of Fig. 1, indoor cooling is carried out on the freeze cycle limit that the limit forms repeatedly.
Narrate the cold device that heats is carried out in control by such freeze cycle block diagram below with reference to Fig. 2.
As shown in Figure 2, convert above-mentioned air conditioner behind the commercial ac voltage that the never illustrated ac power input end of continuous-current plant 10 input provides to and move the DC voltage of needed regulation.
In addition, temperature T r and output to control device 30 in indoor temperature checkout gear 40 sensing chamber is so that the result of the indoor temperature comparison of design temperature Ts that sets by running operation device 20 according to the user and control device 30 controls operation of air conditioner.At this moment, indoor temperature Tr is the temperature value that flow into the room air in the body by the not shown air inlet of air conditioner.
Control drives cross valve 51 to cross valve drive unit 50 according to the control signal of control device 30, so that change the circulation stream of cold-producing medium adaptably with the operating condition of user by 20 inputs of running operation device (freeze or heat).
In addition, compressor drive apparatus 60 is according to the control signal control drive compression machine 61 of the control device 30 of the difference generation of following above-mentioned design temperature Ts and above-mentioned indoor temperature Tr.
Outdoor fan motor drive unit 70 drives outdoor fan motor and delivers to outdoor through outdoor heat exchanger 55 heat exchange air, its basis is by the control signal of the control device 30 of the difference generation of design temperature Ts and indoor temperature Tr, control room external fan rotating speed of motor, thereby control drive chamber external fan 71.
Have again, in the drawings, indoor fan motor drive unit 80 is exactly to drive indoor fan motor will deliver to indoor device with the air (cold wind or hot blast) that above-mentioned indoor heat converter 52 carries out heat exchange, its is according to the control signal that is accompanied by the control device 30 that air quantity that the user sets by running operation device 20 produces, control room internal fan rotating speed of motor, thereby control drive chamber internal fan 81.
Below, the relevant action of the defrosting operation controlling method of the defroster of the air conditioner of formation as mentioned above that utilizes is described.
Fig. 3 A, 3B are the flow charts of showing according to the defrosting control action order of air conditioner of the present invention.S among Fig. 3 A, the 3B represents step.
At first, after power supply adds air conditioner, in continuous-current plant 10, not shown commercial ac power source voltage transitions from the ac power input end input become the desired DC voltage of driving of above-mentioned air conditioner after, output to separately drive circuit and control device 30 respectively.
Therefore, in step S1, control device 30 makes the air conditioner initialization by the DC voltage action of importing from continuous-current plant 10, in step S2, the user sets operating condition (freeze, heat, defrost, clean and the running etc. of blowing) and the design temperature Ts and the indoor air output of air conditioner by running operation device 20.
At this moment, control device 30 transmits control signals to display unit 90, with operating condition and the design temperature Ts etc. of explicit user by 20 inputs of running operation device.
Then, in step S3, judge that the user operates the whether on of running switch of running operation device 20, not have to connect under the situation of (during NO), keep above-mentioned air conditioner in stand-by state during to connection until the running switch at the running switch.
When the judged result of step S3 be the running switch be in on-position situation under (during YES), enter step S4, whether control device 30 is differentiated operating condition is " refrigeration, dehumidifying running ", when its result is not under the situation of " refrigeration, dehumidifying running " (during NO), enter step S41, the running limit of blowing, above-mentioned air conditioner limit turns back to the action of step S4 repeating step S4.
When the judged result among the above-mentioned steps S4 is that operating condition is under the situation of " refrigeration, dehumidifying running " (during YES), the stream of cold-producing medium is changed to be adapted to cooling operation and just should control cross valve 51, thereby carrying out step S5, control device 30 is used to control the control signal of cross valve 51 to 50 outputs of cross valve drive unit.
Thereby in cross valve drive unit 50, by adjust the switching direction of cross valve 51 according to the control signal of control device 30, just can make the sequential loop of cold-producing medium according to compressor 61 → cross valve 51 → outdoor heat exchanger 55 → check valve 56 → expansion valve 53 → indoor heat exchanger 52 → cross valve 51 → compressor 61.
Afterwards, in step S6, control device 30 is to the control signal of indoor fan motor drive unit 80 output drive chamber internal fans 81.
Thereby, in above-mentioned indoor fan motor drive unit 80, according to the control signal of the control device 30 that is produced based on the setting air quantity of user by running operation device 20 input, control room internal fan rotating speed of motor, drive chamber's internal fan 81.
If indoor fan 81 is driven, then begin room air to be drawn in the above-mentioned air conditioner body by not shown suction inlet.Then in step S7, detect the indoor air temperature Tr that sucks by above-mentioned suction inlet, to control device 30 these detected values of output by indoor temperature checkout gear 40.
Then in step S8, differentiate above-mentioned indoor temperature Tr whether than being set in advance in icing occurrence temperature Ta in the control device 30 low (being the indoor temperature that the frosting phenomenon takes place on the indoor heat exchanger when the cooling operation).
When the judged result among the above-mentioned steps S8 begins under the low situation of temperature T a (during YES) for indoor temperature Tr than freezing, be judged to be the state of indoor switch 52 for freezing, enter step S9, control device 30 is when stopping drive compression machine 61, respectively to compressor drive apparatus 60 and indoor fan motor drive unit 80 output control signals, so that with the weak state-driven indoor fan 81 of rotating speed minimum.
Thus, by in compressor drive apparatus 60, compressor being shut down, control room internal fan 81 in indoor fan motor drive unit 80.
Thus, by in compressor drive apparatus 60, compressor being shut down, control room internal fan rotating speed of motor in indoor fan motor drive unit 80 turns round indoor fan 81 under " weak " state, just can remove the defrosting running of the frost of knot on indoor heat exchanger 52.
As mentioned above, as if the running that defrosts at official hour, then in the frost on removing indoor heat exchanger 52, indoor temperature Tr rises gradually, therefore in step S10, indoor temperature checkout gear 40 detects the indoor temperature Tr of above-mentioned rising, and this detected value is outputed to control device 30.
In step S11, differentiate above-mentioned indoor temperature Tr whether than being set in advance in icing releasing temperature T b in the control device 30 (being to remove the indoor temperature of tying the frost on indoor heat exchanger fully when the cooling operation) height.
Be not higher than for indoor temperature Tr under the situation of removing temperature T b of freezing (during NO) in the differentiation result of step S11, be judged to be the state of tying the frost on indoor heat exchanger of not removing fully, thereby turn back to step S9 and repeat the following action of step S9.Otherwise,, be judged to be and remove the state that finishes the frost on indoor heat exchanger 52 fully when indoor temperature Tr removes under the high situation of temperature T b (during YS) than freezing.Thereby enter step S12, whether control device 30 carries out normal cooling operation in order to make above-mentioned air conditioner, judge by indoor temperature checkout gear 40 detected indoor temperature Tr than design temperature Ts height.
On the other hand, when the result of determination among the step S12 is under the indoor temperature Tr situation higher than design temperature Ts (during YES), owing to should proceed indoor cooling, therefore in step S13, control device 30 will output to compressor drive apparatus 60 with the control signal of the operating frequency drive compression machine 61 after determining thus according to the operating frequency of the difference decision compressor 61 of indoor temperature Tr and design temperature Ts.
Thus, in above-mentioned compressor drive unit 60, the operating frequency drive compression machine 61 determined of control device 30 thus.Afterwards, in step S14, control device 30 is determined the rotating speed of outdoor fan motor according to the difference of indoor temperature Tr and design temperature Ts, the control signal of the rotating speed drive chamber external fan 71 after 70 outputs of outdoor fan motor drive unit are determined with this.
Thereby, in above-mentioned outdoor fan motor drive unit 70, with the rotating speed drive chamber external fan of determining by control device 30 71.In step S15, control device 30 is set by the user the control signal that air quantity comes drive chamber's internal fan 81 to 80 outputs of indoor fan motor drive unit.
Thus, in indoor fan motor drive unit 80, come drive chamber's internal fan 81 according to the air quantity control room internal fan rotating speed of motor that the user sets.
As mentioned above, if make compressor 61, outdoor fan 71 and indoor fan 81 runnings, then in step S16, make the cold-producing medium that is compressed into the gas of HTHP by compressor 61 flow into outdoor heat exchanger 55 by cross valve 51, in outdoor heat exchanger 55, the force air cooling back liquefaction that above-mentioned high-temperature high-pressure gas refrigerant is carried by outdoor fan 71.
The liquid refrigerant that is liquefied as low-temp low-pressure in outdoor heat exchanger 55 passes through expansion valve 53 through check valve on one side, flow into indoor heat exchanger 52 Yi Bian be depressurized to the atomized refrigerant of low-temp low-pressure.
In indoor heat exchanger 52, the atomized refrigerant limit evaporation gasification of above-mentioned low-temp low-pressure, the limit seizes heat from the air of being sent into by indoor fan 81, make room air cooling, and this room air (cold wind) that has been cooled is sent into the indoor room cooling of carrying out by indoor fan 81.Afterwards, the gaseous refrigerant of the low-temp low-pressure that has been cooled in above-mentioned indoor heat exchanger 52 is inhaled into compressor 61 once more, shown in Fig. 1 solid line (→), carry out indoor refrigeration limit by the freeze cycle limit that repeats and return action below the above-mentioned steps S7 repeating step S7.
On the other hand, when the judged result among the above-mentioned steps S8 is under the indoor temperature Tr situation low unlike the occurrence temperature Ta that freezes (during NO), be judged to be indoor heat exchanger 52 and be not in icing state, enter step S12, the action that repeating step S12 is following makes air conditioner carry out normal cooling operation.
As mentioned above, if adopt defroster and controlling party thereof according to air conditioner of the present invention Method is then owing to by when cooling operation, judge indoor heat exchanger according to the indoor temperature that changes Whether freeze, control aptly cooling operation by result of determination, thereby have the Indoor Thermal of preventing exchange Machine freezes, and improves the advantage of refrigeration.
Claims (7)
1. the defroster of an air conditioner is characterized in that having in air conditioner:
The indoor temperature checkout gear of the indoor temperature that detection changes when cooling operation; Judge according to the detected indoor temperature of above-mentioned indoor temperature checkout gear whether indoor heat exchanger freezes, thus the control device of judged result control cooling operation; By the compressor drive apparatus of this control device control, the running that defrosts of its control drive compression machine; By the indoor fan motor drive unit of above-mentioned control device control, the running that defrosts of its control drive chamber internal fan.
2. as the defroster of the air conditioner of claim 1 record, it is characterized in that: in above-mentioned control device, storing with from the detected indoor temperature comparison of indoor temperature checkout gear, be used to differentiate the icing generation temperature whether indoor heat exchanger freezes.
3. as the defroster of the air conditioner of claim 1 record, it is characterized in that: in above-mentioned control device, storing with from the detected indoor temperature of indoor temperature checkout gear relatively, be used to differentiate the icing elimination temperature of freezing and whether eliminating of indoor heat exchanger.
4. the defrosting control method of an air conditioner is characterized in that having following steps:
The indoor temperature of the indoor temperature of change detected detects step when cooling operation; Differentiate the defrosting discriminating step whether indoor heat exchanger freezes according to above-mentioned detected indoor temperature; In this discriminating step, when differentiating under the icing situation of indoor heat exchanger, the running that defrosts is to remove the defrosting running step of tying the frost on indoor heat exchanger; When above-mentioned defrosting was turned round, the indoor temperature of change detected was differentiated and whether has been eliminated the defrosting releasing discriminating step of tying the frost on indoor heat exchanger; Remove in the discriminating step in this defrosting,, then carry out the cooling operation step of cooling operation once more if differentiate the frost of having removed on the indoor heat exchanger.
5. as the Defrost method of the air conditioner of claim 4 record, it is characterized in that: in above-mentioned defrosting running step, when indoor temperature being set in icing occurrence temperature in the control device when following, then judge frosting on above-mentioned indoor heat exchanger.
6. as the Defrost method of the air conditioner of claim 4 record, it is characterized in that: in above-mentioned defrosting running step, when the control by above-mentioned control device shuts down compressor, indoor fan is turned round under " weak " state, remove the frost of tying on indoor heat exchanger.
7. as the Defrost method of the air conditioner of claim 4 record, it is characterized in that: remove in the discriminating step in above-mentioned defrosting, when indoor temperature is higher than the icing releasing temperature that is set in above-mentioned control device, then differentiate for having eliminated the frost of tying on above-mentioned indoor heat exchanger.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR21109/95 | 1995-07-18 | ||
| KR1019950021109A KR100187220B1 (en) | 1995-07-18 | 1995-07-18 | Defroster of air conditioner and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1146003A true CN1146003A (en) | 1997-03-26 |
Family
ID=19420864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96102367A Pending CN1146003A (en) | 1995-07-18 | 1996-07-17 | Apparatus of air conditioner and control method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0933146A (en) |
| KR (1) | KR100187220B1 (en) |
| CN (1) | CN1146003A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501353A (en) * | 2014-12-01 | 2015-04-08 | 广东美的制冷设备有限公司 | Dehumidifier, and control method and control device thereof |
| CN106766007A (en) * | 2017-02-21 | 2017-05-31 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and the method for improving air-conditioner defrosting process comfort level |
| CN107208917A (en) * | 2014-11-26 | 2017-09-26 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN109579384A (en) * | 2018-11-23 | 2019-04-05 | 广东日出东方空气能有限公司 | The Defrost method of air friction drag |
| CN113531783A (en) * | 2021-07-21 | 2021-10-22 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016457A2 (en) * | 2002-08-16 | 2004-02-26 | Imperial Sheet Metal Ltd. | Proportional control system for a motor |
| JP4566845B2 (en) * | 2005-07-08 | 2010-10-20 | 三菱電機株式会社 | Air conditioner |
| KR100723945B1 (en) * | 2005-12-30 | 2007-05-31 | 위니아만도 주식회사 | Method for preventing freezing of air-conditioner |
| JP6825336B2 (en) * | 2016-11-30 | 2021-02-03 | ダイキン工業株式会社 | Refrigeration equipment |
| CN107894062B (en) * | 2017-11-10 | 2020-09-25 | 广东美的制冷设备有限公司 | Control method of mobile air conditioner and mobile air conditioner |
| KR102106830B1 (en) * | 2019-10-25 | 2020-05-06 | 주식회사대원단조 | Heat treatment system of large spindle using non-normalized steel |
| CN114061106B (en) * | 2021-11-24 | 2023-06-30 | 美的集团武汉制冷设备有限公司 | Control method, device, equipment and storage medium of air conditioning system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5952331B2 (en) * | 1980-02-13 | 1984-12-19 | 松下電器産業株式会社 | Reevaporation detection device for cooling equipment |
| JPH02213636A (en) * | 1989-02-15 | 1990-08-24 | Hitachi Ltd | Hot water utilizing air conditioner |
| JPH0399157A (en) * | 1989-09-13 | 1991-04-24 | Sanyo Electric Co Ltd | Remote controller for air conditioner |
| JPH04217763A (en) * | 1990-12-18 | 1992-08-07 | Daikin Ind Ltd | Freezing device |
| JPH07103548A (en) * | 1993-10-04 | 1995-04-18 | Fujitsu General Ltd | Defrost controller for air-conditioner |
-
1995
- 1995-07-18 KR KR1019950021109A patent/KR100187220B1/en not_active IP Right Cessation
-
1996
- 1996-07-17 CN CN96102367A patent/CN1146003A/en active Pending
- 1996-07-17 JP JP8187225A patent/JPH0933146A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107208917A (en) * | 2014-11-26 | 2017-09-26 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN107208917B (en) * | 2014-11-26 | 2019-08-09 | 日立江森自控空调有限公司 | Air conditioner |
| CN104501353A (en) * | 2014-12-01 | 2015-04-08 | 广东美的制冷设备有限公司 | Dehumidifier, and control method and control device thereof |
| CN104501353B (en) * | 2014-12-01 | 2017-06-06 | 广东美的制冷设备有限公司 | The control method and control device of dehumidifier and dehumidifier |
| CN106766007A (en) * | 2017-02-21 | 2017-05-31 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and the method for improving air-conditioner defrosting process comfort level |
| CN106766007B (en) * | 2017-02-21 | 2020-02-21 | 青岛海尔空调器有限总公司 | Air conditioner and method for improving comfort degree of air conditioner in defrosting process |
| CN109579384A (en) * | 2018-11-23 | 2019-04-05 | 广东日出东方空气能有限公司 | The Defrost method of air friction drag |
| CN109579384B (en) * | 2018-11-23 | 2020-07-10 | 广东日出东方空气能有限公司 | Defrosting method of air source heat pump hot water unit |
| CN113531783A (en) * | 2021-07-21 | 2021-10-22 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
| CN113531783B (en) * | 2021-07-21 | 2022-06-28 | 四川虹美智能科技有限公司 | Refrigeration anti-freezing control method and device of multi-connected air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100187220B1 (en) | 1999-05-01 |
| KR970007147A (en) | 1997-02-21 |
| JPH0933146A (en) | 1997-02-07 |
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