CN101566517B - Method for judging refrigerant leakage of air-conditioner - Google Patents
Method for judging refrigerant leakage of air-conditioner Download PDFInfo
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- CN101566517B CN101566517B CN2009100992379A CN200910099237A CN101566517B CN 101566517 B CN101566517 B CN 101566517B CN 2009100992379 A CN2009100992379 A CN 2009100992379A CN 200910099237 A CN200910099237 A CN 200910099237A CN 101566517 B CN101566517 B CN 101566517B
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Abstract
The invention discloses a method for judging the refrigerant leakage of an air-conditioner, comprising following steps of: a. recording the temperature T of an indoor pipe coil before starting a compressor; b. judging whether the compressor is started or not, if so, conducting the next step, if not, returning to the step a; c. judging whether the compressor keeps running for x minutes, if so, conducting the next step, if not, returning to the step b; d. recording the temperature T' of the indoor pipe coil when the compressor keeps running for x minutes and recording indoor temperature Tr simultaneously; e. calculating temperature difference between the temperature T' of the indoor pipe coil when the compressor keeps running for x minutes and the temperature T of the indoor pipe coil beforestarting the compressor, calculating the temperature difference between the temperature T' of the indoor pipe coil when the compressor keeps running for x minutes and the indoor temperature Tr recorded simultaneously, to see whether the two temperature differences are less than y, if so, conducting step f, if not, then clearing the running time of the compressor and returning to the step b; and f. shutting down to report faults. The method for judging refrigerant leakage in the air-conditioner has high accuracy.
Description
Technical field
The present invention relates to the determination methods of freezing medium leakage in a kind of air conditioner.
Background technology
Cold-producing medium in the air conditioner (machine) is owing to reasons such as installation, welding, vibration cause a large amount of leakages easily.When cold-producing medium leaks (referring generally to system's inner refrigerant leaks above 40%) in a large number; in case fault can not in time be shut down and report to air conditioner, but under the situation that lacks cold-producing medium, continue long-time running, will cause motor overheating in the compressor; final damage compressor, even cause security incident.
The determination methods of freezing medium leakage generally is the air pressure that detects in the compressor return air pipe in traditional air conditioner, and when force value was lower than alarm setting value, compressor shutdown was also reported fault.But there is very big defective in said method: the muffler internal gas pressure of compressor is very low during the heat pump air conditioner heating mode; when normally moving, heating mode reports fault by mistake for avoiding air-conditioning; minimum pressure value (1bar) in the muffler of unit operate as normal when alarm setting value must be lower than heating mode; so alarm setting value is generally 0.5bar; but the muffler internal gas pressure of compressor very high (the highest 8bar during refrigeration mode) during refrigeration mode; like this; this alarm setting value is on the low side; only just may reach this alarm pressure value after unit has leaked the cold-producing medium more than 80%, system then can't provide protection to freezing medium leakage 80% with interior situation.
Publication number is the determination methods that the instructions of CN1755341A discloses a kind of freezing medium leakage on the website of State Intellectual Property Office, and it is to judge according to the coil temperature whether indoor coil pipe under refrigeration mode is higher than setting whether the unit refrigerant leaks.But this method only is applicable to refrigeration mode, and inapplicable heating mode; And this method only detects a temperature value, and deviation appears in the temperature sensor of detection indoor coil pipe easily in the practical operation, and then causes wrong report or fail to report fault, so the accuracy of this method is lower.
Summary of the invention
The technical problem to be solved in the present invention is that the determination methods of freezing medium leakage in the high air conditioner of a kind of accuracy is provided.
Technical solution of the present invention is, the determination methods of freezing medium leakage in a kind of air conditioner is provided, and it comprises the steps:
Indoor coil pipe T before a, recording compressed machine start;
Whether b, judgement compressor start, if then carry out next step, if otherwise return step a;
C, judged compressor whether continuous service x minute, if then carry out next step, if otherwise return step b;
D, the indoor coil pipe T ' of recording compressed machine continuous service in the time of x minute and indoor temperature Tr meanwhile;
E, calculate the temperature difference between the preceding indoor coil pipe T of the indoor coil pipe T ' of compressor continuous service in the time of x minute and compressor start, calculate the compressor continuous service in the time of x minute indoor coil pipe T ' and the temperature difference between the indoor temperature Tr meanwhile, and judge that whether above-mentioned two temperature difference are less than y, if then enter step f, if otherwise will return step b after the compressor operating time zero clearing;
F, compressor shutdown are also reported fault.
The determination methods of freezing medium leakage compared with prior art has following remarkable advantage and beneficial effect in the air conditioner of the present invention:
With respect to traditional determination methods, the determination methods of freezing medium leakage is highly sensitive in the air conditioner of the present invention, just can shut down the newspaper fault under the situation of air conditioner refrigerating device leakage 40%.Disclosed determination methods on the website with respect to State Intellectual Property Office, the determination methods of freezing medium leakage is to judge whether to leak according to the indoor coil pipe T ' and the temperature difference between the indoor coil pipe T before the compressor start of compressor continuous service in the time of x minute in the air conditioner of the present invention, and the temperature sensor of measuring these two temperature is same temperature sensor, so even deviation (higher or on the low side) appears in the temperature value that this temperature sensor is measured, but the temperature difference between above-mentioned two temperature deviation can not occur, the probability that so just effectively reduces wrong report or fail to report, the accuracy of judgement is higher; And this method both had been applicable to refrigeration, dehumidification mode, was applicable to heating mode, wide adaptability again.Again because the temperature difference that the determination methods of freezing medium leakage must satisfy between the different indoor coil pipe constantly simultaneously in the air conditioner of the present invention is just shut down the newspaper fault less than the temperature difference between setting value y and indoor coil pipe and the indoor environment temperature less than setting value y; the probability of wrong report of the present invention like this is lower, and the accuracy rate of judgement is better.And the determination methods of freezing medium leakage will be upgraded the one-time detection result whenever compressor moves x minute continuously in the air conditioner of the present invention, and historical facts or anecdotes has showed real-time guard to air-conditioning system, dynamically updated.
Description of drawings
Fig. 1 is the determination flow synoptic diagram of determination methods when refrigeration or dehumidification mode of freezing medium leakage in the air conditioner of the present invention.
Fig. 2 is the determination flow synoptic diagram of determination methods when heating mode of freezing medium leakage in the air conditioner of the present invention.
Embodiment
Be described in further detail below in conjunction with the determination methods of the drawings and specific embodiments, but the present invention not only is confined to following specific embodiment freezing medium leakage in the air conditioner of the present invention.
As shown in Figure 1, a kind of embodiment of the determination methods of freezing medium leakage when refrigeration or dehumidification mode in the air conditioner of the present invention, it may further comprise the steps:
Indoor coil pipe T before a, recording compressed machine start;
Whether b, judgement compressor start, if then carry out next step, if otherwise return step a;
C, judge whether continuous service 8 minutes of compressor, if then carry out next step, if otherwise return step b;
D, the indoor coil pipe T ' of recording compressed machine continuous service in the time of 8 minutes and indoor temperature Tr meanwhile;
E, calculate the temperature difference between the preceding indoor coil pipe T of the indoor coil pipe T ' of compressor continuous service in the time of 8 minutes and compressor start, calculate the compressor continuous service in the time of 8 minutes indoor coil pipe T ' and the temperature difference between the indoor temperature Tr meanwhile, and judge that whether above-mentioned two temperature difference are less than 5 ℃, if then enter step f, if otherwise will return step b after the compressor operating time zero clearing;
F, compressor shutdown are also reported fault.
As shown in Figure 2, a kind of embodiment of the determination methods of freezing medium leakage when heating mode in the air conditioner of the present invention, it may further comprise the steps:
Indoor coil pipe T before a, recording compressed machine start;
Whether b, judgement compressor start, if then carry out next step, if otherwise return step a;
C, judge whether continuous service 8 minutes of compressor, if otherwise return step b; If need also then to judge whether unit defrosts, if then finish the deterministic process of freezing medium leakage in the whole air conditioner, if otherwise continue to enter steps d.
D, the indoor coil pipe T ' of recording compressed machine continuous service in the time of 8 minutes and indoor temperature Tr meanwhile;
E, calculate the temperature difference between the preceding indoor coil pipe T of the indoor coil pipe T ' of compressor continuous service in the time of 8 minutes and compressor start, calculate the compressor continuous service in the time of 8 minutes indoor coil pipe T ' and the temperature difference between the indoor temperature Tr meanwhile, and judge that whether above-mentioned two temperature difference are less than 8 ℃, if then enter step f, if otherwise will return step b after the compressor operating time zero clearing;
F, compressor shutdown are also reported fault.
Claims (6)
1. the determination methods of freezing medium leakage in the air conditioner, it may further comprise the steps:
Indoor coil pipe T before a, recording compressed machine start;
Whether b, judgement compressor start, if then carry out next step, if otherwise return step a;
C, judged compressor whether continuous service x minute, if then carry out next step, if otherwise return step b;
D, the indoor coil pipe T ' of recording compressed machine continuous service in the time of x minute and indoor temperature T meanwhile
r
E, calculate the temperature difference between the indoor coil pipe T before the indoor coil pipe T ' of compressor continuous service in the time of x minute and the compressor start, the calculating indoor coil pipe T ' of compressor continuous service in the time of x minute and indoor temperature T meanwhile
rBetween the temperature difference, and whether judge above-mentioned two temperature difference less than y, if then enter step f, if otherwise will return step b after the compressor operating time zero clearing;
F, compressor shutdown are also reported fault.
2. the determination methods of freezing medium leakage in the air conditioner according to claim 1 is characterized in that: be meant 5～10 minutes in the described x of step c minute.
3. the determination methods of freezing medium leakage in the air conditioner according to claim 2 is characterized in that: be meant 8 minutes in the described x of step c minute.
4. the determination methods of freezing medium leakage in the air conditioner according to claim 1 is characterized in that: the described y of step e is meant 3～8 ℃ when refrigeration or dehumidification mode, be meant 5～10 ℃ when heating mode.
5. the determination methods of freezing medium leakage in the air conditioner according to claim 4 is characterized in that: the described y of step e is meant 5 ℃ when refrigeration or dehumidification mode, be meant 8 ℃ when heating mode.
6. the determination methods of freezing medium leakage in the air conditioner according to claim 1 is characterized in that: when heating mode, step c is, judges compressor whether continuous service x minute, if otherwise return step b; If need also then to judge whether unit defrosts, if then finish the deterministic process of freezing medium leakage in the whole air conditioner, if otherwise continue to enter steps d.
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| CN2009100992379A CN101566517B (en) | 2009-05-26 | 2009-05-26 | Method for judging refrigerant leakage of air-conditioner |
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| CN2009100992379A CN101566517B (en) | 2009-05-26 | 2009-05-26 | Method for judging refrigerant leakage of air-conditioner |
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| CN101566517B true CN101566517B (en) | 2010-11-17 |
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| CN101813357B (en) * | 2010-04-01 | 2012-07-11 | 广东美的电器股份有限公司 | Method for protecting compressor of air conditioning unit |
| CN103388883B (en) * | 2013-07-31 | 2015-12-02 | 美的集团武汉制冷设备有限公司 | The decision method of refrigrant leakage and transducer air conditioning in transducer air conditioning |
| CN104566771A (en) * | 2013-10-23 | 2015-04-29 | 珠海格力电器股份有限公司 | Refrigerant control method and device of dehumidifier |
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| CN104677551A (en) * | 2013-11-26 | 2015-06-03 | 美的集团股份有限公司 | Refrigerant leakage detection method for air conditioning system |
| CN103940560B (en) * | 2014-04-10 | 2016-08-17 | 广东美的制冷设备有限公司 | Coolant leakage detection method, refrigerant leakage detecting system and air-conditioner |
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| US10094736B2 (en) * | 2015-07-16 | 2018-10-09 | Schneider Electric USA, Inc. | Method for detecting compressed air system leakage |
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| CN110762743B (en) * | 2018-07-26 | 2021-05-18 | 奥克斯空调股份有限公司 | Air conditioner and air conditioner refrigerant leakage detection method |
| CN110895026B (en) * | 2018-09-12 | 2021-03-12 | 奥克斯空调股份有限公司 | Air conditioner refrigerant leakage detection method and air conditioner using same |
| CN110274730B (en) * | 2019-07-02 | 2020-06-12 | 浙江国祥股份有限公司 | Air-conditioner air tightness testing device |
| CN110398022B (en) * | 2019-08-02 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Air conditioner overload protection judgment method and device and air conditioner |
| CN113970163A (en) * | 2020-07-24 | 2022-01-25 | 广东美的制冷设备有限公司 | Air conditioner and refrigerant leakage detection method and device thereof, and readable storage medium |
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Inventor after: Zheng Jianjiang Inventor after: Jiang Jianjun Inventor before: Jiang Jianjun |
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Address after: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee after: NINGBO AUX ELECTRIC CO., LTD. Address before: 315191 Zhejiang city of Ningbo province Jiangshan town Yinzhou District Mingguang Road No. 1166 Patentee before: Ningbo AUX Electric Co., Ltd. |