CN110360779B - Liquid impact prevention protection control method for air-cooled refrigerator compressor - Google Patents
Liquid impact prevention protection control method for air-cooled refrigerator compressor Download PDFInfo
- Publication number
- CN110360779B CN110360779B CN201910632704.3A CN201910632704A CN110360779B CN 110360779 B CN110360779 B CN 110360779B CN 201910632704 A CN201910632704 A CN 201910632704A CN 110360779 B CN110360779 B CN 110360779B
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- compressor
- temperature
- cooling chamber
- refrigerator
- fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
Abstract
The invention discloses a liquid impact prevention protection control method for an air-cooled refrigerator compressor, which comprises the following steps that when a defrosting temperature sensor is lower than-35 ℃, the compressor is forced to stop, but a fan continues to operate until the temperature sensor in a cooling chamber reaches the stop point temperature of the set temperature in the cooling chamber, and the fan stops operating; if the compressor is stopped and the running time of the fan reaches 30min, the temperature sensor in the cooling chamber still does not reach the temperature of the stop point of the set temperature in the cooling chamber, at the moment, the compressor is restarted, the fan also continues to run, and the refrigerator runs back to the normal running state of the normal mode.
Description
The technical field is as follows:
the invention relates to a liquid impact prevention protection control method for an air-cooled refrigerator compressor, and belongs to the technical field of refrigerators.
Background art:
the computer temperature controlled air cooling refrigerator includes cooling chamber, fan, control system and refrigerating system. A sensor for sensing the temperature in the cooling chamber is arranged in the cooling chamber; the refrigerating system comprises a compressor, a cooler, a muffler and a refrigerant, wherein the cooler is provided with a defrosting temperature sensor for sensing the temperature of the cooler; the refrigeration principle of the refrigerator is as follows: the refrigerator control system senses whether a temperature sensor in the cooling chamber reaches the temperature of the start-stop point of the compressor or not to control the start-stop of the compressor; the start and stop of the fan are controlled by the start and stop of the compressor, the start and stop of the compressor are synchronous, when the temperature of the cooling chamber temperature sensor rises to the temperature of the start point of the compressor, the compressor is started, the refrigerating system runs, the cooler starts to cool, the fan starts to run, and the cold energy on the cooler is brought into the cooling chamber to achieve the refrigerating effect of the refrigerator; after the compressor and the fan operate for a period of time, when the temperature sensor of the cooling chamber reduces to the temperature of the shutdown point of the compressor, the compressor stops, the fan stops operating, and the temperatures of the cooler and the cooling chamber start to rise back; when the temperature sensor of the cooling chamber rises to the starting point temperature of the compressor, the refrigerator starts to refrigerate and cool again, and the process is circulated, so that the cooling chamber of the refrigerator is always maintained in a stable low-temperature state, and the refrigeration function of the refrigerator is achieved.
The refrigerator is under the refrigeration principle steady operation state that the above-mentioned describes, when the refrigerator is in high ambient temperature, the cold volume demand in the cooling chamber needs to be satisfied to the cold volume on the refrigerator cooler, because high ambient temperature, the cooling chamber is great with external environment temperature difference in temperature, cold volume loss is very fast, when compressor and fan operation, cold volume on the cooler can be brought to the cooling chamber fast, even compressor and fan operation is longer, the temperature on the cooler also can be maintained at a high temperature, the refrigerant in the cooler is leaving behind the cooler this moment, mostly is the gas-liquid mixture state, through the intensification of muffler, the refrigerant has all become the gaseous state that the compressor can normally inhale when arriving the compressor induction port, because the refrigerator will satisfy the cold volume demand of cooling chamber when high ambient temperature. When the refrigerator is at low ambient temperature, the temperature difference between the cooling chamber and the external ambient temperature is small, the loss of cold energy is slow, the refrigerating capacity provided by the refrigerator cooler is far higher than the demand of the cooling chamber when the compressor and the fan are operated, before the temperature of the cooling chamber sensor is reduced to the temperature of the stop point of the compressor, the compressor only runs for a short time, a large amount of cold energy stays on the cooler, so that the temperature on the cooler is quickly reduced, and is maintained in a very low temperature state, at the moment, the refrigerant in the cooler is basically in a low-temperature liquid state after leaving the cooler, even through the heating of muffler, still can have partial liquid refrigerant can't volatilize completely when the refrigerant reachs the compressor suction port, and liquid refrigerant can be inhaled by the compressor suction port this moment, causes the liquid hammer phenomenon of compressor, and the compressor is hit after many times of liquid, will seriously influence the life of compressor.
The invention content is as follows:
the invention provides a liquid impact prevention protection control method for an air-cooled refrigerator compressor, which aims to solve the problems in the prior art.
The technical scheme adopted by the invention is as follows: a liquid impact prevention protection control method for an air-cooled refrigerator compressor comprises the following steps:
(1) when the temperature sensed by the temperature sensor in the cooling chamber actually rises to the temperature of the starting point of the compressor giving the refrigeration request by the cooling chamber of the refrigerator, the refrigerator starts to refrigerate and cool again, and at the moment, the compressor is started and the fan runs;
(2) if the temperature actually sensed by the temperature sensor in the cooling chamber does not reach the shutdown point temperature of the compressor giving a refrigeration stopping request by the cooling chamber of the refrigerator, judging whether to forcibly shut down the compressor or not by detecting whether the temperature actually sensed by the defrosting temperature sensor on the cooler is lower than the liquid impact risk temperature value of minus 35 ℃, if detecting that the temperature actually sensed by the defrosting temperature sensor on the cooler is lower than the liquid impact risk temperature value of minus 35 ℃, forcibly shutting down the compressor, stopping the compressor at the moment, and continuing to operate the fan;
(3) if the compressor is stopped and the fan runs for 30min, the temperature actually sensed by the temperature sensor in the cooling chamber still does not reach the temperature of the stop point of the compressor giving the refrigeration stop request by the cooling chamber of the refrigerator, at the moment, the compressor of the refrigerator restarts running, and the fan returns to the normal running mode and runs synchronously with the compressor; the refrigerator is operated back to the normal operation state of the normal mode.
The invention has the following beneficial effects: the liquid impact prevention protection control method for the air-cooled refrigerator compressor can prevent the liquid impact problem of the compressor caused by the existence of liquid refrigerant when the refrigerant reaches the air suction port of the compressor under the condition that the computer temperature-controlled air-cooled refrigerator meets the requirement of high ambient temperature refrigerating capacity and the refrigerator is normally refrigerated in the low ambient temperature cooling chamber due to overlong running time of the refrigerator compressor (the longer the running time of the compressor is, the lower the temperature of the cooler is), thereby prolonging the service life of the compressor.
Description of the drawings:
FIG. 1 is a flow chart of the liquid impact prevention protection control method for the air-cooled refrigerator compressor.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
When the temperature of the cooler is reduced to-35 ℃, the compressor still continues to operate, the cooler is continuously cooled, a liquid refrigerant begins to appear at an air suction port of the compressor, and liquid impact risk is caused to the compressor.
(1) When the temperature (Tfcc) actually sensed by the temperature sensor in the cooling chamber rises back to the starting point temperature (Tfck) of the compressor giving a refrigeration request by the cooling chamber of the refrigerator, the refrigerator starts to refrigerate and cool again, and at the moment, the compressor is started and the fan runs;
(2) if the temperature (Tfcc) actually sensed by the temperature sensor in the cooling chamber does not reach the compressor stopping point temperature (Tfct) of the refrigerator cooling chamber for giving a request of stopping refrigeration, judging whether to forcibly stop the compressor or not by detecting whether the temperature (Tdef) actually sensed by the defrosting temperature sensor on the cooler is lower than a liquid impact risk temperature value of-35 ℃, if the temperature (Tdef) actually sensed by the defrosting temperature sensor on the cooler is lower than a liquid impact risk temperature value of-35 ℃, forcibly stopping the compressor, because a large amount of cold energy is remained on the cooler, the fan does not synchronously stop along with the compressor at the moment, the fan continues to run, the residual cold energy on the cooler is brought into the cooling chamber to achieve the purpose of refrigerating the cooling chamber, and meanwhile, the residual cold energy on the cooler is fully utilized, the energy consumption of the refrigerator is reduced;
(3) if the compressor stops and the fan runs for 30min, the temperature (Tfcc) actually sensed by the temperature sensor in the cooling chamber still does not reach the shutdown point temperature (Tfct) of the compressor giving the refrigeration stopping request by the cooling chamber of the refrigerator, and the residual cold quantity on the cooler is judged to be incapable of meeting the cold quantity required by the cooling chamber reaching the set temperature, at the moment, the compressor of the refrigerator restarts running, and the fan returns to the normal running mode and runs synchronously with the compressor; the refrigerator is operated back to the normal operation state of the normal mode.
When the temperature (Tdef) actually sensed by a defrosting temperature sensor on the cooler is lower than-35 ℃, the compressor is forced to stop at the moment, but the fan still continues to operate, the temperature (Tfcc) actually sensed by the temperature sensor in the cooling chamber reaches the shutdown point temperature (Tfct) of the compressor giving a refrigeration stopping request by the cooling chamber of the refrigerator, and the fan also stops operating at the moment; if the compressor is stopped and the running time of the fan reaches 30min, the temperature (Tfcc) actually sensed by the temperature sensor in the cooling chamber does not reach the temperature (Tfct) of the stop point of the compressor giving the refrigeration stop request by the cooling chamber of the refrigerator, at the moment, the compressor is restarted, the fan also continues to run, and the refrigerator returns to the normal running state of the normal mode.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (1)
1. A liquid impact prevention protection control method for an air-cooled refrigerator compressor comprises the following steps of (1): when the temperature sensed by the temperature sensor in the cooling chamber actually rises to the temperature of the starting point of the compressor giving the refrigeration request by the cooling chamber of the refrigerator, the refrigerator starts to refrigerate and cool again, and at the moment, the compressor is started and the fan runs; the method is characterized in that: also comprises the following steps:
if the temperature actually sensed by the temperature sensor in the cooling chamber does not reach the shutdown point temperature of the compressor giving a refrigeration stopping request by the cooling chamber of the refrigerator, judging whether to forcibly shut down the compressor or not by detecting whether the temperature actually sensed by the defrosting temperature sensor on the cooler is lower than the liquid impact risk temperature value of-35 ℃, if so, forcibly shutting down the compressor, and at the moment, stopping the compressor and continuing to operate the fan;
if the compressor is stopped and the fan runs for 30min, the temperature actually sensed by the temperature sensor in the cooling chamber still does not reach the temperature of the stop point of the compressor giving the refrigeration stop request by the cooling chamber of the refrigerator, at the moment, the compressor of the refrigerator restarts running, and the fan returns to the normal running mode and runs synchronously with the compressor; the refrigerator is operated back to the normal operation state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632704.3A CN110360779B (en) | 2019-07-14 | 2019-07-14 | Liquid impact prevention protection control method for air-cooled refrigerator compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910632704.3A CN110360779B (en) | 2019-07-14 | 2019-07-14 | Liquid impact prevention protection control method for air-cooled refrigerator compressor |
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| Publication Number | Publication Date |
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| CN110360779A CN110360779A (en) | 2019-10-22 |
| CN110360779B true CN110360779B (en) | 2021-07-06 |
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| CN201910632704.3A Active CN110360779B (en) | 2019-07-14 | 2019-07-14 | Liquid impact prevention protection control method for air-cooled refrigerator compressor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201488138U (en) * | 2009-08-28 | 2010-05-26 | 海信科龙电器股份有限公司 | Air conditioner suitable for refrigeration under low-temperature environment |
| CN104132423A (en) * | 2014-07-14 | 2014-11-05 | 美的集团股份有限公司 | Control method and control device for liquid impact prevention for air conditioning system and air conditioning system |
| CN105605875A (en) * | 2016-02-01 | 2016-05-25 | 合肥美的电冰箱有限公司 | Control method and system of electronic freezing refrigerator |
| CN106288638A (en) * | 2016-08-17 | 2017-01-04 | 合肥华凌股份有限公司 | A kind of control method of refrigerator |
| CN106766479A (en) * | 2016-12-09 | 2017-05-31 | 青岛海尔股份有限公司 | The simple gate refrigerator and its control method of a kind of temperature-changeable |
| CN108507247A (en) * | 2018-05-09 | 2018-09-07 | 中山市实力仕商用设备制造有限公司 | A kind of commercial display cases prevent the control system and its control method of compressor liquid hammer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10408513B2 (en) * | 2015-02-18 | 2019-09-10 | Heatcraft Refrigeration Products, Inc. | Oil line control system |
-
2019
- 2019-07-14 CN CN201910632704.3A patent/CN110360779B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201488138U (en) * | 2009-08-28 | 2010-05-26 | 海信科龙电器股份有限公司 | Air conditioner suitable for refrigeration under low-temperature environment |
| CN104132423A (en) * | 2014-07-14 | 2014-11-05 | 美的集团股份有限公司 | Control method and control device for liquid impact prevention for air conditioning system and air conditioning system |
| CN105605875A (en) * | 2016-02-01 | 2016-05-25 | 合肥美的电冰箱有限公司 | Control method and system of electronic freezing refrigerator |
| CN106288638A (en) * | 2016-08-17 | 2017-01-04 | 合肥华凌股份有限公司 | A kind of control method of refrigerator |
| CN106766479A (en) * | 2016-12-09 | 2017-05-31 | 青岛海尔股份有限公司 | The simple gate refrigerator and its control method of a kind of temperature-changeable |
| CN108507247A (en) * | 2018-05-09 | 2018-09-07 | 中山市实力仕商用设备制造有限公司 | A kind of commercial display cases prevent the control system and its control method of compressor liquid hammer |
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| CN110360779A (en) | 2019-10-22 |
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Address after: 211200 Skyworth electric appliance (Nanjing) Industrial Park, Lishui Economic Development Zone, Nanjing, Jiangsu Province Patentee after: SKYWORTH Electric Co.,Ltd. Address before: SKYWORTH (Nanjing) Industrial Park, 96 Binhuai Avenue, Lishui Economic Development Zone, Nanjing, Jiangsu, 211200 Patentee before: NANJING CHUANGWEI HOUSEHOLD ELECTRONIC APPLIANCES Ltd. |
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