CN1443985A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN1443985A CN1443985A CN 02104057 CN02104057A CN1443985A CN 1443985 A CN1443985 A CN 1443985A CN 02104057 CN02104057 CN 02104057 CN 02104057 A CN02104057 A CN 02104057A CN 1443985 A CN1443985 A CN 1443985A
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- compressor
- refrigerant
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- condenser
- evaporimeter
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Abstract
The present invention discloses a control method for preventing refrigerant liquor from feeding into compressor, and is characterized by that the temp. of refrigerant fed into compressor is always retained above overheat temp. and this control process utilizes expansion device to control flow of refrigerant so as to regulate the temperature of refrigerant fed into the compressor, specially control the flow of refrigerant fed into compressor after the mode conversion so as to prevent the refrigerant liquor from feeding into compressor.
Description
Technical field
The invention relates to air-conditioner, or rather, is about preventing that air-conditioner coolant liquid from entering compressor, particularly preventing that when the air-conditioner operating mode changes refrigerant liquid from entering the control method of compressor.
Background technology
Air-conditioner is the conditioner that room air is maintained optimum state.For example, freeze summer, and heat winter, and can regulate indoor humidity, keeps IAQ.
In general, air-conditioner comprises compressor, condenser, expansion gear, evaporimeter and is connected the refrigerant comb of these parts.By the variation of refrigerant in circulatory system internal state, carry out heat exchange with indoor air, through the process of heat release or heat absorption, reach the purpose of regulating indoor air temperature.
Figure one is temperature in the cooling cycle system-pressure dependence figure.
--liquefaction--expansion---vaporization etc. are the process of circulation constantly in the air-conditioner cooling cycle system, to have the compression of refrigerant.
Compressor absorbs the overheated cold media gas of evaporator evaporation, makes its hypersaturated state with high temperature, high pressure be sent to condenser.Enter gas release heat in air of condenser, become the subcooled liquid of hypersaturated state after the refrigerant cooling.
Subcooled liquid becomes the state of easy evaporation being depressurized through in the expansion gear.When it constantly heats up owing to absorbed airborne heat during by evaporimeter, and then evaporation.So refrigerant becomes gaseous state again in evaporimeter, and when entering compressor, become oversaturated overheated gas by evaporimeter.A among the figure one is the supercooling temperature district, and B is the overtemperature district.
Overheated and cold excessively state variation has taken place in refrigerant in the circulatory system, and should gas completely when entering and discharge compressor, but this only is theoretic saying, in fact inevitably the difference that exists, in kind of refrigeration cycle, when if the refrigerant that flows is too much or more very few than the amount of the refrigerant that carries out heat exchange, just can not state variation completely take place in each process.So refrigerant when entering compressor by evaporimeter, owing to there is incomplete state variation, makes a part of liquid coolant enter compressor, therefore caused the noise of compressor, also reduced the operating efficiency of compressor.When being transformed into heating mode when particularly being transformed into defrosting mode from heating mode and from defrosting mode, the possibility that liquid coolant enters compressor is bigger, and this is because original running changes condenser into for the heat exchanger of evaporimeter; And original running changes the cause of evaporimeter into for the heat exchanger of condenser.
Air-conditioner in the past is provided with takes any liquid of refrigerant that prevents to enter the effective measures of compressor, thereby has reduced the serviceability of compressor.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide a kind of and be used to prevent that air-conditioner coolant liquid from entering compressor, particularly preventing that when the air-conditioner operating mode changes refrigerant liquid from entering the control method of compressor, thereby reduce the noise of air-conditioner, improve efficiency of air conditioner and serviceability thereof.
Control method of the present invention comprises following content.
1. the control method of an air-conditioner, described air-conditioner comprises condenser, evaporimeter, compressor and expansion gear; Finish the heat exchanging process of the refrigerant that comes out from compressor by condenser and evaporimeter; Coolant quantity between evaporimeter and the condenser is controlled by expansion gear; It is characterized in that, may further comprise the steps:
(1) checks the temperature that refrigerant enters compressor;
(2) judge whether the temperature that refrigerant enters compressor reaches overtemperature;
When (3) confirming that temperature that refrigerant enters compressor reaches overtemperature, the port of control expansion gear is discharged between the temperature of compressor and the condenser refrigerant and is had certain temperature difference;
(4) if when the temperature that refrigerant enters compressor is lower than overtemperature, the port of control expansion gear, the temperature that makes refrigerant enter compressor reaches overtemperature.
2. the control method of an air-conditioner, described air-conditioner comprises condenser, evaporimeter, expansion gear and switching valve, is finished the heat exchanging process of the refrigerant that comes out from compressor by condenser and evaporimeter; Coolant quantity between evaporimeter and the condenser is controlled by expansion gear; Changing of the operating mode of air-conditioner by switching valve; It is characterized in that, may further comprise the steps:
(1) conversion time between judgement heating mode and the defrosting mode;
When (2) arriving conversion time between heating mode and the defrosting mode, keeps original operating state, and handle is in the side that refrigerant on the condenser is transferred to evaporimeter;
(3) by switching valve conversion operation pattern;
(4) refrigerant that reaches compressor one side of the port by the control expansion gear reaches overtemperature.
3. the pattern conversion in the described control method 2 (1) is to be transformed into defrosting mode from heating mode.
4. the refrigerant in the described control method 2 (2) is to be in the state that stops at compressor, and move in the expansion gear limiting time of fully opening.
5. the compressor in the described control method 2 (4) operates with highest frequency, and outdoor fan keeps closing state.
The present invention's usefulness compared to prior art is, prevented that effectively air-conditioner coolant liquid from entering compressor, particularly when the air-conditioner operating mode changes, thereby reduced the noise of air-conditioner, improved efficiency of air conditioner and serviceability thereof.
Description of drawings
Fig. 1 is temperature in the cooling cycle system-pressure dependence figure;
Fig. 2 is that the present invention prevents that refrigerant liquid from entering the control flow chart of compressor;
Fig. 3 is a control structure block diagram of the present invention;
Fig. 4 prevents that refrigerant liquid from entering the control flow chart of compressor when being transition operation pattern of the present invention;
Fig. 5 is the control method flow chart of air-conditioner of the present invention.
Description of reference numerals among the figure:
10---compressor 15---condenser
20---expansion gear 25---evaporimeter
300---controllers 303---defrosting finishes inductor
306---temperature sensors 309---defrosting inductor
312---timer 315---signal loader
321---outdoor fan 324---switching valve
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
By among Fig. 3 and Fig. 2 as can be seen, compressor 10, expansion gear 20, switching valve 324 are controlled by control part 300, and control part 300 is operation frequency and the port of expansion gear 20 and conversion operations of switching valve 324 that control method designed according to this invention is controlled compressor 10.The execution ON/OFF of control part 300 same control room external fans 321 is to promote the heat convection of outdoor heat converter.
Because the process need regular hour of pattern conversion changes the position transfer of refrigerant in the air-conditioner running, timer 312 aims at the needed time of position transfer of calculating refrigerant, and the result of calculation of timer 312 is added their confirmation by control part 300.
In addition, air-conditioner also is provided with defrosting inductor 309, defrosting finishes inductor 303, temperature sensor 306.Defrosting inductor 309 is that air-conditioner comes into operation when heating mode is converted to defrosting mode, it is that the defrosting running comes into operation when finishing that defrosting finishes inductor 303, and temperature sensor 306 is to be provided with for the temperature that detects the cold media gas that compressor 10 sucks.Signal loader 315 can be imported relevant instruction to controller 300, as heats operation, defrost operation and out of Memory instruction.
In control air-conditioner operation, it is as follows to prevent that liquid coolant from entering the operating process of compressor.
Heating be along with the user by signal loader 315 input or along with temperature auto control comes into operation.The controller 300 of this moment is detecting the temperature of the suction cold media gas of compressor 10 all the time, and controller 300 is to judge that by the testing result of the temperature sensor 306 that is arranged on compressor 10 air entry fronts compressor sucks the temperature of cold media gas.Entered for 100 stages this moment.
In 100 stages, if detected compressor 10 sucks the temperature of cold media gas during greater than the overtemperature set, and it is no problem that cold media gas enters compressor 10.If but detected compressor 10 sucks the temperature of cold media gas during less than the overtemperature set, and it is unallowed that cold media gas enters compressor 10.
In 130 stages, controller 300 reduces the flow of refrigerant by the port of control expansion gear 20, thereby improves the temperature of refrigerant.Owing to reducing of the flow that enters the evaporimeter refrigerant from expansion gear 20, make fewer refrigerant on evaporimeter, fully carry out heat exchange, thereby heat up rapidly with surrounding air, be overheated gas naturally so enter the refrigerant of compressor 10.
If the temperature that compressor 10 sucks cold media gas is during greater than the overtemperature set, the cold media gas of this moment is the overheated gas of sufficient state variation.So this moment is the flow-control of refrigerant certain temperature difference of maintenance between the discharge temperature of compressor and condenser.Entered for 120 stages.The control of the flow of refrigerant also is to realize by the port of control expansion gear 20, is to make many refrigerants enter into evaporimeter by the port that enlarges expansion gear 20.
When heating running normally, controlling the flow of refrigerant by the temperature difference between compressor 10 and the condenser, but still the temperature of the suction cold media gas of needs moment monitors compressor 10, when the temperature of compressor suction cold media gas is lower than design temperature, will improve its temperature by the flow of control refrigerant.
Below in conjunction with Fig. 4 and Fig. 5, air-conditioner is prevented that in the transition operation pattern process that liquid coolant enters compressor is described.
The user heats signal by the 315 input startups of signal loader, is received and enforcement by controller 300.Exactly the frequency of compressor 10 is increased to operation frequency gradually by zero, outdoor fan 321 is opened, switching valve 324 is transformed into the state that heats running, the port of expansion gear 20 is opened to the normal operation state gradually.Enter 200 stages and 203 stages this moment.
Meanwhile, indoor heat exchanger is with the running of condenser state, and outdoor heat exchanger operates with evaporator stage; Heat exchanger indoor in defrosting mode operates with evaporator stage, and outdoor heat exchanger then operates with the condenser state.
Heating after circulation continues for some time, can frosting on outdoor heat exchanger, so controller 300 begins to start defrosting mode, the initial point of defrost operation is to be decided by factors such as the time of setting, temperature.The inductor 309 that defrosts this moment comes into operation and information is passed to controller 300.Entered for 206 stages.
Refrigerant during kind of refrigeration cycle is to flow to compressor 10 from evaporimeter 25, flows to condenser 15 from compressor 10 again.When switching to defrosting mode by heating mode, condenser will become evaporimeter, so the refrigerant that accumulates on the indoor heat converter should in time enter compressor.During heating mode, on indoor heat converter, there are 80% of whole refrigerants, so should transfer to the running that begins to control defrosting mode after the outdoor heat converter again to these refrigerants when heating mode will be transformed into defrosting mode.Controller 300 remains on the state that heats circulation time in order to shift refrigerant with switching valve 324, and the port of expansion gear 20 is fully opened, and the frequency of compressor 10 is reduced to 30hz or shutdown, close chamber's external fan 321.Entered for 209 stages.
In 212 stages, will keep setting-up time 10-15 second, the refrigerant on the indoor heat converter is transferred on the outdoor heat converter.
312 pairs 212 stages of timer are carried out Time Calculation, communicate information to controller 300 again.In case wait to arrive the time of setting, controller 300 is transformed into defrosting mode with switching valve 324, carry out defrost operation this moment, compressor 10 is with the highest frequency running, and outdoor fan 321 is still closed, thereby removes the frosting on outdoor heat converter.Entered for 215 stages.
Method of the present invention is before air-conditioner is converted to defrosting mode from heating mode, the refrigerant of indoor heat converter is transferred on the outdoor heat converter, so running is very a spot of for the refrigerant that the indoor heat converter of evaporimeter enters compressor after the pattern conversion, and be to obtain sufficient heat exchange and reached superheat state.
In 215 stages, the temperature of heat exchanger reaches a timing defrosting end inductor 303 and comes into operation.Entered for 218 stages, 218 stages were stages that induction defrosting running finishes.In general the defrosting mode end point is whether to reach set point of temperature according to the temperature on the refrigerant comb of evaporimeter to decide.When arriving the end point of defrosting mode, controller 300 begins defrosting mode is converted to heating mode, also will prevent that certainly liquid coolant from entering compressor this time.
When being converted to heating mode by defrosting mode, outdoor condenser will become evaporimeter, so the refrigerant that accumulates on the outdoor heat converter should in time enter compressor.
On outdoor heat converter, there are 80% of whole refrigerants during defrosting mode, begin to control the running of heating mode again after when defrosting mode is transformed into heating mode, should transferring to indoor heat converter to these refrigerants, because in the pattern conversion, be easy to cause that liquid coolant enters the phenomenon of compressor.
Controller 300 is in order to shift refrigerant; switching valve 324 is remained on the state of defrost operation, the port of expansion gear 20 is fully opened, the frequency of compressor 10 is reduced to 30hz or shutdown; close chamber's external fan 321 makes the refrigerant of outdoor heat converter transfer to indoor heat converter.Entered for 221 stages.
In 224 stages, will keep setting-up time 10-15 second, the refrigerant on the outdoor heat converter is transferred on the indoor heat converter.
312 pairs 224 stages of timer are carried out Time Calculation, communicate information to controller 300 again.In case wait to arrive the time of setting, controller 300 is transformed into heating mode with switching valve 324, heat operation this moment, compressor 10 begins to operate by normal frequency gradually from zero, expansion gear 20 reverts to the normal operation state from zero gradually with port, opening chamber's external fan 321, thus original heat exchange running recovered.Entered for 227 stages.
Method of the present invention is before air-conditioner is converted to heating mode from defrosting mode, the refrigerant of outdoor heat converter is transferred on the indoor heat converter, so running is very a spot of for the refrigerant that the outdoor heat converter of evaporimeter enters compressor after the pattern conversion, and be to obtain sufficient heat exchange and reached superheat state.
Method of the present invention is in the running of control air-conditioner, remain enter compressor refrigerant temperature more than overtemperature, thereby this control procedure is the temperature of regulating the refrigerant that enters compressor by the flow of expansion gear 20 control refrigerants, enter the flow of the refrigerant of compressor after the pattern that particularly is controlled at is changed, prevented the phenomenon that refrigerant liquid enters compressor.
Claims (5)
1. the control method of an air-conditioner, described air-conditioner comprises condenser, evaporimeter, compressor and expansion gear; Finish the heat exchanging process of the refrigerant that comes out from compressor by condenser and evaporimeter; Coolant quantity between evaporimeter and the condenser is controlled by expansion gear: it is characterized in that, may further comprise the steps:
(1) detects the temperature that cold media gas enters compressor;
(2) judge whether the temperature that cold media gas enters compressor reaches overtemperature;
When (3) confirming that temperature that cold media gas enters compressor reaches overtemperature, the port of control expansion gear is discharged between the temperature of compressor and the condenser cold media gas and is had certain temperature difference;
(4) if when the temperature that cold media gas enters compressor is lower than overtemperature, the port of control expansion gear, the temperature that makes cold media gas enter compressor reaches overtemperature.
2. the control method of an air-conditioner, described air-conditioner comprises condenser, evaporimeter, compressor, expansion gear and switching valve, condenser and evaporimeter are finished the heat exchanging process of the refrigerant that comes out from compressor; Coolant quantity between evaporimeter and the condenser is controlled by expansion gear; Changing of the operating mode of air-conditioner by switching valve; It is characterized in that, may further comprise the steps:
(1) conversion time between judgement heating mode and the defrosting mode;
When (2) arriving conversion time between heating mode and the defrosting mode, keeps original operating state, and handle is in the side that refrigerant on the condenser is transferred to evaporimeter;
(3) by switching valve conversion operation pattern;
(4) refrigerant that reaches compressor one side of the port by the control expansion gear reaches overtemperature.
3. control method according to claim 2 is characterized in that, the pattern conversion of described step (1) is to be transformed into defrosting mode from heating mode.
4. control method according to claim 2 is characterized in that, the refrigerant of described step (2) is to be in the state that stops at compressor, and expansion gear fully open with limiting time in shift.
5. control method according to claim 2 is characterized in that, the compressor of described step (4) operates with highest frequency, and outdoor fan keeps closing state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104057 CN1265150C (en) | 2002-03-08 | 2002-03-08 | Control method of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104057 CN1265150C (en) | 2002-03-08 | 2002-03-08 | Control method of air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1443985A true CN1443985A (en) | 2003-09-24 |
| CN1265150C CN1265150C (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02104057 Expired - Fee Related CN1265150C (en) | 2002-03-08 | 2002-03-08 | Control method of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1265150C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412455C (en) * | 2005-01-26 | 2008-08-20 | 海尔集团公司 | Sub air conditioner heating starting and controlling method for concatenate air conditioner |
| CN103162384A (en) * | 2013-03-04 | 2013-06-19 | 约克（无锡）空调冷冻设备有限公司 | Draught fan control method of heat pump operation |
| CN107166594A (en) * | 2017-06-19 | 2017-09-15 | 青岛海尔空调器有限总公司 | A kind of air conditioner, control method and control device |
| CN107860098A (en) * | 2017-11-03 | 2018-03-30 | 宁波奥克斯电气股份有限公司 | A kind of refrigerant transfer method and device |
| CN108826612A (en) * | 2018-04-28 | 2018-11-16 | 四川长虹空调有限公司 | Air-conditioner defrosting four-way valve method for handover control and air-conditioning |
| CN111512098A (en) * | 2018-01-24 | 2020-08-07 | 东芝开利株式会社 | Refrigeration cycle device |
-
2002
- 2002-03-08 CN CN 02104057 patent/CN1265150C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412455C (en) * | 2005-01-26 | 2008-08-20 | 海尔集团公司 | Sub air conditioner heating starting and controlling method for concatenate air conditioner |
| CN103162384A (en) * | 2013-03-04 | 2013-06-19 | 约克（无锡）空调冷冻设备有限公司 | Draught fan control method of heat pump operation |
| CN103162384B (en) * | 2013-03-04 | 2016-01-13 | 约克（无锡）空调冷冻设备有限公司 | The blower control method of operation of heat pump |
| CN107166594A (en) * | 2017-06-19 | 2017-09-15 | 青岛海尔空调器有限总公司 | A kind of air conditioner, control method and control device |
| CN107860098A (en) * | 2017-11-03 | 2018-03-30 | 宁波奥克斯电气股份有限公司 | A kind of refrigerant transfer method and device |
| CN107860098B (en) * | 2017-11-03 | 2019-10-11 | 宁波奥克斯电气股份有限公司 | A kind of refrigerant transfer method and device |
| CN111512098A (en) * | 2018-01-24 | 2020-08-07 | 东芝开利株式会社 | Refrigeration cycle device |
| CN111512098B (en) * | 2018-01-24 | 2022-04-29 | 东芝开利株式会社 | Refrigeration cycle device |
| CN108826612A (en) * | 2018-04-28 | 2018-11-16 | 四川长虹空调有限公司 | Air-conditioner defrosting four-way valve method for handover control and air-conditioning |
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| Publication number | Publication date |
|---|---|
| CN1265150C (en) | 2006-07-19 |
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Granted publication date: 20060719 Termination date: 20130308 |