CN101813357B - Method for protecting compressor of air conditioning unit - Google Patents
Method for protecting compressor of air conditioning unit Download PDFInfo
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- CN101813357B CN101813357B CN2010101416355A CN201010141635A CN101813357B CN 101813357 B CN101813357 B CN 101813357B CN 2010101416355 A CN2010101416355 A CN 2010101416355A CN 201010141635 A CN201010141635 A CN 201010141635A CN 101813357 B CN101813357 B CN 101813357B
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Abstract
The invention relates to a method for protecting a compressor of an air conditioning unit, which is characterized by comprising the following steps: 1) starting up and refrigerating: starting to count N=0 by a counter in the air conditioning unit, and executing step 2); 2) operating and executing step 3); 3) detecting return air temperature T1 of the air conditioning unit and coil temperature T2 of an evaporator and executing step 4); 4) recording operation time t, and executing step 5) and step 10); and 5) judging whether t is larger than or equal to 3min and (T1-T2) is smaller than 5 DEG C, executing step 6) if the above conditions are meet simultaneously, otherwise executing step 2). In the invention, only the control software part is required to change, so that the compressor of the air conditioning unit can avoid from being burnout in an abnormal condition, thus achieving the purpose of protecting the compressor under the premise of not changing the current air conditioning unit system; and the method has the characteristics of flexible operation, high safety degree and wide application range.
Description
Technical field
The present invention relates to a kind of guard method of cooler compressor.
Background technology
Compressor is the core component of air-conditioner, after system goes wrong, if protect bad; Then can burn out compressor, such as when system's refrigerant seriously leaks, when leakage rate reaches more than 50% of charging amount; When still switching on, tend to burn out compressor to compressor.
In present domestic air conditioner design, majority has been considered the protection of system under the normal condition, like the evaporimeter low-temperature protection, sees accompanying drawing 1, and existing method of operating may further comprise the steps: the first step, and next the start refrigeration carried out for second step; In second step, next operation carried out for the 3rd step; In the 3rd step, survey the coil temperature T2 that examines evaporimeter; Next carried out for the 4th step; In the 4th step, whether the coil temperature T2 that judges evaporimeter is less than 2 ℃, if " denying " then carried out for second step, if " being " carried out for the 5th step; In the 5th step, the evaporimeter low-temperature protection is shut down, and next carries out for the 6th step; In the 6th step, next the waiting system balance carried out for second step.In this existing method of operating, the protection for abnormal conditions lower compression machine had not been arranged, if air-conditioning system because of coolant leakage, the electric control gear of this air-conditioner still can be supplied power to compressor; But because of load is very little, electric current is very little; The OLP protector that compressor carries can not reach operation condition; After long-time, the compressor oil severe exacerbation finally causes the motor of compressor to be burnt out.
Summary of the invention
The object of the invention aims to provide the guard method of the cooler compressor of a kind of simple and reasonable, flexible operation, air-conditioner that safe coefficient is high, applied widely, to overcome weak point of the prior art.
Press the guard method of a kind of cooler compressor of this purpose design, it is characterized in that comprising following operating procedure:
The first step, the start refrigeration begins to count N=0 through the counter in the air-conditioner; Next carried out for second step;
Second step, operation; Next carried out for the 3rd step;
The 3rd step, detect the return air temperature T1 of air-conditioner and the coil temperature T2 of evaporimeter, next carried out for the 4th step;
The 4th step, record t running time;
After executing the 3rd step and the 4th step, next carried out for the 5th step and the tenth step simultaneously;
The 5th step, whether judge t more than or equal to 3 minutes, and whether T1-T2 is less than 5 ℃, just carried out for the 6th step if satisfy simultaneously, just do not carry out second and go on foot if do not satisfy simultaneously;
The 6th step, rolling counters forward N=N+1; Next carried out for the 7th step;
In the 7th step, the coolant leakage protection is shut down; Next carried out for the 8th step;
The 8th step, the waiting system balance; Next carried out for the 9th step;
The 9th step, whether judge N less than 2, if " denying " just carried out for the 13 step, if " being " then carried out second and gone on foot after three minutes after shutdown;
In the tenth step, whether judge T2 less than 2 ℃, if " denying " just carried out for second step, if " being " just carried out for the 11 step;
In the 11 step, the evaporimeter low-temperature protection is shut down; Next carried out for the 12 step;
In the 12 step, next the waiting system balance carried out for second step;
The 13 step, shut down, show fault, wait for maintenance.
Said the 3rd step and the exchange each other of the 4th step.
The present invention is under the prerequisite that need not change existing air-conditioner system; Only need change control software section; Just can protect cooler compressor under abnormal conditions, to be unlikely burns out; Thereby reach the purpose of protection compressor, it has flexible operation, high, the advantage of wide range of application of safe coefficient.
Description of drawings
Fig. 1 is an operational flowchart of the prior art.
Fig. 2 is the operational flowchart of one embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Be that example describes only below with the air-conditioner of certain 1HP.
Referring to Fig. 2, under refrigeration mode, air-conditioner is started shooting, begin to count N=0 through the counter in the air-conditioner; After the compressor start of air-conditioner moved t minute, generally speaking, t chose more than or equal to 3 minutes; Be preferably 5 minutes, detect evaporator coil temperature T2 and air-conditioner return air temperature T1, if the difference of T1-T2 is bigger; Generally be more than or equal to 5 ℃; The temperature that evaporimeter is described is lower, and air-conditioner can normally freeze, and can continue refrigeration; If the difference of T1-T2 is smaller, generally be less than 5 ℃, explain that then the air-conditioner coolant amount leaked too much, can not normally freeze, need carry out the coolant leakage protection, then stop to shut down to the compressor power supply; The waiting system balance.In the process of waiting system balance, rolling counters forward N=N+1; And got into for the 9th step: judge that whether N is less than 2.
If judged result is " being ", promptly show it is the coolant leakage protection to occur for the first time and shut down, this moment N=1, then after three minutes after shutdown; To the compressor energising, restart to carry out operation, once more if it is still smaller to occur the difference of above-mentioned situation: T1-T2 again, less than 5 ℃; At this moment, carry out rolling counters forward N=N+1 once more, and the N=2 of this moment; Judged result for the 9th step is a "No", then gets into for the 13 step: air-conditioner no longer to the compressor energising, is shut down; Show the compressor fault code, cannot recover automatically that expression needs repairing;
If judged result is " denying ", promptly show not to be to occur for the first time the coolant leakage protection, then got into for the 13 step, directly shut down, show compressor fault, wait for maintenance.
, carry out simultaneously then in the difference process of above-mentioned judgement T1-T2 for the evaporimeter low-temperature protection.When evaporator coil temperature T2 less than 2 ℃, just belong to the evaporimeter low-temperature protection, need to shut down, and the waiting system balance.This part is identical with prior art.
Claims (2)
1. the guard method of a cooler compressor is characterized in that comprising following operating procedure:
The first step, the start refrigeration begins to count N=0 through the counter in the air-conditioner; Next carried out for second step;
Second step, operation; Next carried out for the 3rd step;
The 3rd step, detect the return air temperature T1 of air-conditioner and the coil temperature T2 of evaporimeter, next carried out for the 4th step;
The 4th step, record t running time;
After executing the 3rd step and the 4th step, next carried out for the 5th step and the tenth step simultaneously;
The 5th step, whether judge t more than or equal to 3 minutes, and whether T1-T2 is less than 5 ℃, just carried out for the 6th step if satisfy simultaneously, just do not carry out second and go on foot if do not satisfy simultaneously;
The 6th step, rolling counters forward N=N+1; Next carried out for the 7th step;
In the 7th step, the coolant leakage protection is shut down; Next carried out for the 8th step;
The 8th step, the waiting system balance; Next carried out for the 9th step;
The 9th step, whether judge N less than 2, if " denying " just carried out for the 13 step, if " being " then carried out second and gone on foot after three minutes after shutdown;
In the tenth step, whether judge T2 less than 2 ℃, if " denying " just carried out for second step, if " being " just carried out for the 11 step;
In the 11 step, the evaporimeter low-temperature protection is shut down; Next carried out for the 12 step;
In the 12 step, next the waiting system balance carried out for second step;
The 13 step, shut down, show fault, wait for maintenance.
2. the guard method of cooler compressor according to claim 1 is characterized in that said the 3rd step and the exchange each other of the 4th step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101416355A CN101813357B (en) | 2010-04-01 | 2010-04-01 | Method for protecting compressor of air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101416355A CN101813357B (en) | 2010-04-01 | 2010-04-01 | Method for protecting compressor of air conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101813357A CN101813357A (en) | 2010-08-25 |
| CN101813357B true CN101813357B (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101416355A Active CN101813357B (en) | 2010-04-01 | 2010-04-01 | Method for protecting compressor of air conditioning unit |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062458A (en) * | 2010-11-29 | 2011-05-18 | 青岛海信日立空调系统有限公司 | Method for carrying out fault judgment and shutdown control on air conditioning compressor |
| JP5310911B1 (en) * | 2012-06-13 | 2013-10-09 | ダイキン工業株式会社 | Refrigeration equipment |
| CN104566771A (en) * | 2013-10-23 | 2015-04-29 | 珠海格力电器股份有限公司 | Method and device for controlling refrigerant of dehumidifier |
| CN103884480B (en) * | 2014-03-14 | 2016-07-06 | 广东美的制冷设备有限公司 | Coolant leakage detection method, refrigerant leakage detecting system and air-conditioner |
| CN104655365A (en) * | 2014-12-30 | 2015-05-27 | 海信科龙电器股份有限公司 | Method for detecting refrigerant leakage and air conditioner |
| CN104949266B (en) * | 2015-06-04 | 2017-11-10 | 广东美的制冷设备有限公司 | The secondary refrigerant leakage detection method of air conditioner and air conditioner |
| CN105202712B (en) * | 2015-10-26 | 2018-05-15 | 珠海格力电器股份有限公司 | The method and apparatus for detecting compressor operating state |
| CN107314519B (en) * | 2017-06-14 | 2020-05-22 | 海信家电集团股份有限公司 | Method and device for judging refrigerant leakage of air conditioner |
| CN111878915A (en) * | 2020-07-16 | 2020-11-03 | 海信（广东）空调有限公司 | Dehumidifier and refrigerant leakage control method thereof |
| CN112240623B (en) * | 2020-09-30 | 2022-05-31 | 重庆海尔空调器有限公司 | Control method of air conditioner and air conditioner |
| CN116872685B (en) * | 2023-09-05 | 2023-11-21 | 徐州徐工挖掘机械有限公司 | Remote diagnosis method, system, platform and storage medium for vehicle air conditioning system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201382520Y (en) * | 2009-03-25 | 2010-01-13 | 宁波奥克斯空调有限公司 | Compressor protecting device for air conditioner in short of fluoride |
| CN101526259A (en) * | 2009-03-31 | 2009-09-09 | 宁波海诚电器有限公司 | Detection and protection method of lack of fluorine of air-conditioners |
| CN101566517B (en) * | 2009-05-26 | 2010-11-17 | 宁波奥克斯电气有限公司 | Method for judging refrigerant leakage of air-conditioner |
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| CN101813357A (en) | 2010-08-25 |
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Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131216 |
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Effective date of registration: 20131216 Address after: B, district 26-28, beautiful avenue, No. 6, beautiful avenue, Beijiao Town, Foshan District, Shunde, China Patentee after: Midea Group Co., Ltd. Address before: 528300 Penglai Road, Beijiao Town, Shunde District, Guangdong, Foshan Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |