CN102331067A - Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner - Google Patents
Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner Download PDFInfo
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- CN102331067A CN102331067A CN201110145121A CN201110145121A CN102331067A CN 102331067 A CN102331067 A CN 102331067A CN 201110145121 A CN201110145121 A CN 201110145121A CN 201110145121 A CN201110145121 A CN 201110145121A CN 102331067 A CN102331067 A CN 102331067A
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Abstract
The invention discloses a control method for the protection of a compressor during the refrigeration cycle of a direct-current frequency-conversion air conditioner, comprising the following steps of: a, normally running the air conditioner; b, detecting a suction temperature T of a suction inlet of the compressor; c, judging whether the suction temperature T is equal to or greater than To; if so, returning to the step b; and if not, turning to the next step; d, running an outdoor fan in a low wind shift, running an indoor fan in a high wind shift, reducing the opening degree of an electronic expansion valve, and running the compressor with a reduced frequency; e, repeating the step b; and f, judging whether the suction temperature T is equal to or greater than Tr; if so, returning to the step a; and if not, returning to the step d. Through the control method, the compressor can be prevented from being slugged at low temperature.
Description
Technical field
The present invention relates to field of air conditioning, is the control method of compressor protection during kind of refrigeration cycle in a kind of direct current varied-frequency air conditioner specifically.
Background technology
The operation principle of direct current varied-frequency air conditioner kind of refrigeration cycle is following: cold-producing medium becomes high pressure, high temperature vapor through compressor compresses, and refrigerant vapour heat release in the condenser of outdoor unit is passed to outdoor air with heat; And refrigerant vapour is condensed into the liquid of high pressure; Pass through throttling arrangement such as electric expansion valve throttling again, become the gas-liquid two-phase of low-temp low-pressure, become the gas of low pressure again through the evaporimeter of indoor units and the heat that absorbs room air; Get into compressor again, so repeatedly; Thereby outdoor fan orders about outdoor air and around the fin of condenser, flows and promote the cold-producing medium heat exchange in outdoor air and the condenser, and room air is mobile around the fin of evaporimeter to impel the cold-producing medium heat exchange in room air and the evaporimeter thereby indoor fan orders about.
When the direct current varied-frequency air conditioner kind of refrigeration cycle of prior art was normally moved, all with high wind shelves operation, the electrical equipment expansion valve was with the operation of 350 steps for indoor fan and outdoor fan, and compressor also moves with normal frequency.
And at present, often need air-conditioner to continue the stability that refrigeration guarantees product in the low temperature indoor environment in industries such as medical treatment, food.But under low temperature environment; Often low excessively during the air-conditioning unit operation owing to indoor temperature; It is not enough to make that cold-producing medium in the evaporimeter of indoor units absorbs heat from room air, causes the cold-producing medium evaporation capacity not enough, and then it is too much to cause being inhaled into the liquid refrigerant of compressor; Hydraulic pressure in the compressor is excessive, finally causes compressor damage.
Summary of the invention
The technical problem that the present invention will solve is, provides a kind of compressor that under low temperature environment, prevents by the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner of liquid hammer.
Technical solution of the present invention is, the control method of compressor protection when kind of refrigeration cycle in a kind of direct current varied-frequency air conditioner is provided, and it comprises the steps:
A, normal operating air conditioner;
The suction temperature T of b, detection compressor suction;
C, whether judge suction temperature T more than or equal to To, if then return step b; If otherwise carry out next step;
D, low wind shelves operation outdoor fan, high wind shelves move indoor fan, reduce the aperture of electric expansion valve, frequency reducing operation compressor;
E, repeating step b;
F, whether judge suction temperature T more than or equal to Tr, if then return step a; If, then do not return steps d.
In the direct current varied-frequency air conditioner of the present invention during kind of refrigeration cycle the control method of compressor protection compared with prior art have following remarkable advantage and beneficial effect:
When air-conditioner in low temperature environment during refrigerating operaton, if suction temperature is lower than To, at this moment; High wind shelves operation indoor fan; Make the cold-producing medium and the space air of process indoor units carry out maximum exchange heat, and then the evaporation capacity of the cold-producing medium in the evaporimeter of increasing indoor units, the feasible liquid state that is inhaled into the cold-producing medium of compressor reduces, gaseous state increases; Lower the compression internal hydraulic, the protection compressor; And low wind shelves operation outdoor fan; Then be in order farthest to reduce through the cold-producing medium of outdoor unit and the heat of outdoor air; Reduce the condensation number of the cold-producing medium in the condenser, and then make the liquid refrigerant in the whole system reduce, gaseous refrigerant increases; The same compression internal hydraulic that reduces, the protection compressor; And frequency reducing operation compressor; On the one hand be in order to reduce the speed of service of cold-producing medium in pipeline, make the evaporation of in pipeline, absorb heat of more liquid refrigerants, so the feasible cold-producing medium liquid state that is inhaled into compressor still less, gaseous state is more; Thereby reduction hydraulic pressure, the protection compressor; And turn down electric expansion valve, also be in order to strengthen the evaporation capacity of cold-producing medium, make the cold-producing medium that is inhaled into compressor liquid state still less.
As improvement, the described To of step c is meant 2～4.8 ℃, when the temperature that experiment showed, To repeatedly is in this scope, the liquid refrigerant that gets into compressor still less, to the protection better effects if of compressor.
As improving again, preferred 4 ℃ of the described To of step c, when experiment showed, that repeatedly To is 4 ℃, the liquid refrigerant that gets into compressor is minimum, and is best to the protection effect of compressor.
As also improving, the described aperture that reduces electric expansion valve of steps d is meant, the aperture of expansion valve was adjusted into for 100～125 steps; Through experiment proof repeatedly; The aperture of expansion valve is in this scope the time, the liquid refrigerant that gets into compressor still less, to the protection better effects if of compressor.
As also improving, the described aperture that reduces electric expansion valve of steps d is meant again, the aperture of expansion valve was adjusted into for 120 steps; Through experiment proof repeatedly; When the aperture of expansion valve was 120 steps, the liquid refrigerant that gets into compressor is minimum, and was best to the protection effect of compressor.
As further improvement, the described frequency reducing of steps d operation compressor is meant, compressor is with the quick frequency reducing of the acceleration of 1Hz/S, and is when repeatedly experiment showed, compressor with this speed frequency reducing, the most desirable to the protection effect of compressor.
As also further improving, the Tr described in the step f is meant 4～6.8 ℃, crosses the temperature in this scope time that experiment showed, Tr repeatedly, the liquid refrigerant that gets into compressor still less, to the protection better effects if of compressor.
As further improving again, preferred 6 ℃ of Tr, when experiment showed, that repeatedly Tr is 6 ℃, the liquid refrigerant that gets into compressor is minimum, and is best to the protection effect of compressor.
Description of drawings
Accompanying drawing is the schematic flow sheet of the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner of the present invention.
The specific embodiment
To the control method further explain of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner of the present invention, but the present invention not only is confined to following specific embodiment below in conjunction with accompanying drawing and specific embodiment.
Shown in accompanying drawing, a kind of embodiment of the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner of the present invention, it may further comprise the steps:
A, normal operating air conditioner;
The suction temperature T of b, detection compressor suction, described suction temperature is meant the temperature through the cold-producing medium of compressor suction, custom is referred to as suction temperature in the industry;
C, whether judge suction temperature T more than or equal to To, if then return step b; If otherwise carried out next step, To would be meant 4 ℃;
D, low wind shelves operation outdoor fan, high wind shelves move indoor fan, reduce the aperture of electric expansion valve; The aperture of expansion valve was adjusted into for 120 steps; Frequency reducing operation compressor, compressor is 40HZ like compressor first second frequency with the quick frequency reducing of the acceleration of 1Hz/S; Second second frequency is 39HZ, and frequency was 38HZ etc. in the 3rd second;
E, repeating step b;
F, whether judge suction temperature T more than or equal to Tr, if then return step a; If not, then return steps d, Tr is meant 6 ℃.
Control method of the present invention need not the air-conditioning unit of prior art is reequiped; In other words; Control method of the present invention just can be able to implement by the air-conditioner unit of prior art fully; In particular, control method of the present invention is just can implement by the master controller that is electrically connected with outdoor fan, indoor fan, expansion valve, compressor respectively in the air-conditioning unit of prior art.
Claims (8)
1. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner, it is characterized in that: it may further comprise the steps:
A, normal operating air conditioner;
The suction temperature T of b, detection compressor suction;
C, whether judge suction temperature T more than or equal to To, if then return step b; If otherwise carry out next step;
D, low wind shelves operation outdoor fan, high wind shelves move indoor fan, reduce the aperture of electric expansion valve, frequency reducing operation compressor;
E, repeating step b;
F, whether judge suction temperature T more than or equal to Tr, if then return step a; If, then do not return steps d.
2. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 1, it is characterized in that: the described To of step c is meant 2～4.8 ℃.
3. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 2, it is characterized in that: the described To of step c is meant 4 ℃.
4. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 1 is characterized in that: the described aperture that reduces electric expansion valve of steps d is meant, the aperture of expansion valve was adjusted into for 100～125 steps.
5. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 4 is characterized in that: the described aperture that reduces electric expansion valve of steps d is meant, the aperture of expansion valve was adjusted into for 120 steps.
6. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 1 is characterized in that: the described frequency reducing operation of steps d compressor is meant that compressor is with the quick frequency reducing of the acceleration of 1Hz/S.
7. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 1, it is characterized in that: the Tr described in the step f is meant 4～6.8 ℃.
8. the control method of compressor protection during kind of refrigeration cycle in the direct current varied-frequency air conditioner according to claim 7, it is characterized in that: the Tr described in the step f is meant 6 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110145121A CN102331067A (en) | 2011-05-24 | 2011-05-24 | Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110145121A CN102331067A (en) | 2011-05-24 | 2011-05-24 | Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner |
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| CN102331067A true CN102331067A (en) | 2012-01-25 |
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| CN201110145121A Pending CN102331067A (en) | 2011-05-24 | 2011-05-24 | Control method for protection of compressor during refrigeration cycle of direct-current frequency-conversion air conditioner |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104334981A (en) * | 2012-06-13 | 2015-02-04 | 大金工业株式会社 | Refrigeration device |
| CN104481881A (en) * | 2014-10-27 | 2015-04-01 | 珠海格力电器股份有限公司 | Air-conditioning unit compressor liquid impact determination method and system and air-conditioning unit |
| CN105794646A (en) * | 2016-04-08 | 2016-07-27 | 佛山市融信通企业咨询服务有限公司 | Double-layer tissue culture room |
| CN106052025A (en) * | 2016-06-01 | 2016-10-26 | 青岛海信日立空调系统有限公司 | Air conditioner control method and device |
| CN106196455A (en) * | 2016-07-15 | 2016-12-07 | 珠海格力电器股份有限公司 | Motor control method and system and air-conditioner |
| CN106440236A (en) * | 2016-10-24 | 2017-02-22 | 邯郸美的制冷设备有限公司 | Control method and control system for returned liquid protection function, and air conditioner |
| CN106801972A (en) * | 2016-12-27 | 2017-06-06 | 青岛海尔空调器有限总公司 | A kind of transducer air conditioning protects control method and transducer air conditioning |
| WO2018068531A1 (en) * | 2016-10-10 | 2018-04-19 | 芜湖美智空调设备有限公司 | Method and device for controlling stopping of air conditioner, and air conditioner |
| CN107940844A (en) * | 2017-11-22 | 2018-04-20 | 珠海格力电器股份有限公司 | Judge method of the compressor air suction with liquid and the control method of coolant circulating system |
| CN108317667A (en) * | 2018-01-22 | 2018-07-24 | 青岛海尔空调器有限总公司 | A kind of air-conditioning internal machine freezing detection method and device |
| CN108731290A (en) * | 2017-04-24 | 2018-11-02 | 富士电机株式会社 | Refrigerant return device |
| CN111473499A (en) * | 2020-04-29 | 2020-07-31 | 广东美的暖通设备有限公司 | Air conditioning system, control method and device thereof and storage medium |
| CN112781290A (en) * | 2020-04-10 | 2021-05-11 | 青岛海尔新能源电器有限公司 | Heat pump system control method and heat pump system |
| CN113465114A (en) * | 2021-05-21 | 2021-10-01 | 宁波奥克斯电气股份有限公司 | Control method and device for preventing low-voltage error protection and air conditioner |
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| CN101089500A (en) * | 2006-06-16 | 2007-12-19 | 乐金电子(天津)电器有限公司 | Duplex air governor and its control method |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104334981A (en) * | 2012-06-13 | 2015-02-04 | 大金工业株式会社 | Refrigeration device |
| CN104481881A (en) * | 2014-10-27 | 2015-04-01 | 珠海格力电器股份有限公司 | Air-conditioning unit compressor liquid impact determination method and system and air-conditioning unit |
| CN105794646A (en) * | 2016-04-08 | 2016-07-27 | 佛山市融信通企业咨询服务有限公司 | Double-layer tissue culture room |
| CN106052025A (en) * | 2016-06-01 | 2016-10-26 | 青岛海信日立空调系统有限公司 | Air conditioner control method and device |
| CN106052025B (en) * | 2016-06-01 | 2019-02-15 | 青岛海信日立空调系统有限公司 | A kind of air conditioning control method and control device |
| CN106196455A (en) * | 2016-07-15 | 2016-12-07 | 珠海格力电器股份有限公司 | Motor control method and system and air-conditioner |
| WO2018068531A1 (en) * | 2016-10-10 | 2018-04-19 | 芜湖美智空调设备有限公司 | Method and device for controlling stopping of air conditioner, and air conditioner |
| CN106440236B (en) * | 2016-10-24 | 2019-02-22 | 邯郸美的制冷设备有限公司 | Return control method, control system and the air conditioner of liquid defencive function |
| CN106440236A (en) * | 2016-10-24 | 2017-02-22 | 邯郸美的制冷设备有限公司 | Control method and control system for returned liquid protection function, and air conditioner |
| CN106801972A (en) * | 2016-12-27 | 2017-06-06 | 青岛海尔空调器有限总公司 | A kind of transducer air conditioning protects control method and transducer air conditioning |
| CN106801972B (en) * | 2016-12-27 | 2019-10-01 | 青岛海尔空调器有限总公司 | A kind of transducer air conditioning protection control method and transducer air conditioning |
| CN108731290A (en) * | 2017-04-24 | 2018-11-02 | 富士电机株式会社 | Refrigerant return device |
| CN107940844A (en) * | 2017-11-22 | 2018-04-20 | 珠海格力电器股份有限公司 | Judge method of the compressor air suction with liquid and the control method of coolant circulating system |
| CN107940844B (en) * | 2017-11-22 | 2019-09-20 | 珠海格力电器股份有限公司 | Judge the control method of method of the compressor air suction with liquid and coolant circulating system |
| CN108317667A (en) * | 2018-01-22 | 2018-07-24 | 青岛海尔空调器有限总公司 | A kind of air-conditioning internal machine freezing detection method and device |
| CN108317667B (en) * | 2018-01-22 | 2020-12-29 | 青岛海尔空调器有限总公司 | Method and device for detecting icing of air conditioner indoor unit |
| CN112781290A (en) * | 2020-04-10 | 2021-05-11 | 青岛海尔新能源电器有限公司 | Heat pump system control method and heat pump system |
| CN111473499A (en) * | 2020-04-29 | 2020-07-31 | 广东美的暖通设备有限公司 | Air conditioning system, control method and device thereof and storage medium |
| CN113465114A (en) * | 2021-05-21 | 2021-10-01 | 宁波奥克斯电气股份有限公司 | Control method and device for preventing low-voltage error protection and air conditioner |
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Application publication date: 20120125 |