CN102288359A - Method for diagnosing air-conditioner pressure abnormal mode - Google Patents
Method for diagnosing air-conditioner pressure abnormal mode Download PDFInfo
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- CN102288359A CN102288359A CN2010102070528A CN201010207052A CN102288359A CN 102288359 A CN102288359 A CN 102288359A CN 2010102070528 A CN2010102070528 A CN 2010102070528A CN 201010207052 A CN201010207052 A CN 201010207052A CN 102288359 A CN102288359 A CN 102288359A
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- air
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- conditioner
- controller
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- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a method for diagnosing an air-conditioner pressure abnormal mode. Two pressure sensors are respectively installed at the high-pressure end and the low-pressure end of an air-conditioner pipeline; a pressure value is transmitted into a microprocessor of an air-conditioner controller by a line; the normal pressure change range of an air-conditioner system is stored into the microprocessor when a compressor is operated and not operated; a normal and faulted display sign is arranged on a display screen of the air-conditioner controller; once the air-conditioner controller is started, the controller carries out self-checking to as to avoid misoperation; after the compressor stops running for an hour or so, the pressure at the high-pressure end and the low-pressure end are basically same; if the pressure at the high-pressure end and the low-pressure end has a larger pressure difference, the air-conditioner part has blockage; if the condition occurs, the controller sends an alarm signal; and the invention reminds a vehicle owner to carry out air-conditioner overhaul in time, improves the air quality in the vehicle, reduces the failure maintenance time, saves energy and effectively prevents the damage of the air-conditioner compressor.
Description
Technical field
The present invention relates to vehicle electric field, especially a kind of diagnostic method that is used for air conditioning for automobiles.
Background technology
In the vehicle traveling process,, certainly will influence the refrigeration of air-conditioning system and increase energy consumption in case operation of air conditioner takes place unusually; At present, when air-conditioning broke down, air-conditioner controller can not remind the consumer to check timely, and the reference information that corresponding failure can not be provided is to the maintenance personal, and the personnel of needing repairing adopt special-purpose pressure test instrument to detect, not only time-consuming but also effort.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existence, a kind of diagnostic method of air conditioning pressure abnormal patterns is provided, monitoring air-conditioning system pressure changing condition informs the consumer more intuitively with the operation conditions and the failure message of air-conditioning.
The objective of the invention is to finish by following technical solution, a kind of diagnostic method of air conditioning pressure abnormal patterns, it includes following step:
A, the pressure transducer of the high and low pressure side of air-conditioning is connected with the microprocessor of air-conditioner controller, the alerting signal when on controller, different faults being set, and when start, carry out self check;
B, by demarcating, test out the air conditioning pressure variation range under engine speed 1500r/min～2000r/min situation, utilize the C language to program, be stored in the microprocessor of air-conditioner controller;
Whether C, startup air conditioning for automobiles detect air conditioning pressure and operate in the normal range;
In the described C step, when pressure changes just often, controller shows normal information; When the pressure variation exceeds normal range, compare by MCU, thereby judge corresponding fault, controller sends corresponding alerting signal.
The present invention utilizes the pressure of the high and low pressure side of automotive air-conditioning system to change the operational situation of judging air-conditioning system, is applicable to high-grade automobile, improves comfortableness, in time reminds the car owner to carry out the air-conditioning maintenance, improves air quality in the car; Reduce the time of breakdown maintenance; Save the energy; Effectively avoid the damage of compressor of air conditioner.
Description of drawings
Fig. 1 is a principle of work block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done detailed introduction: as shown in Figure 1: two pressure transducers are installed in high-pressure side, the low pressure end of air-conditioning duct respectively, pressure value are transferred in the microprocessor of air-conditioner controller by wire harness.
The normal pressure variation range of air-conditioning system is not stored in the microprocessor during with compressor operation and when not turning round, displaying symbol when normal and fault are set on the display screen of air-conditioner controller, in case air-conditioner controller is opened, controller should carry out self check, to avoid maloperation;
After compressor shut down about one hour, the pressure of high-pressure side, low pressure end should be basic identical; If the pressure of high-pressure side, low pressure end has big pressure reduction, the decidable air supply rate has obstruction; If the pressure of high-pressure side, low pressure end is basic identical, but the subnormal pressure scope illustrates that then there is leakage in air-conditioning; As above-mentioned condition takes place, controller sends alerting signal;
Compressor of air conditioner is opened, the rotating speed of engine is controlled at about 1500r/min～2000r/min, the normal pressure variation range of present air conditioning pressure and setting is compared, when the pressure variation exceeds the pressure limit of demarcation, compare by MCU, judge corresponding air-conditioning fault, send alerting signal to the display screen of controller, prompting the car owner check.
Claims (2)
1. the diagnostic method of an air conditioning pressure abnormal patterns is characterized in that it includes following step:
A, the pressure transducer of the high and low pressure side of air-conditioning is connected with the microprocessor of air-conditioner controller, the alerting signal when on controller, different faults being set, and when start, carry out self check;
B, by demarcating, test out the air conditioning pressure variation range under engine speed 1500r/min～2000r/min situation, utilize the C language to program, be stored in the microprocessor of air-conditioner controller;
Whether C, startup air conditioning for automobiles detect air conditioning pressure and operate in the normal range;
2. the diagnostic method of air conditioning pressure abnormal patterns according to claim 1 is characterized in that in the described C step, and when pressure changes just often, controller shows normal information; When the pressure variation exceeds normal range, compare by MCU, thereby judge corresponding fault, controller sends corresponding alerting signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102070528A CN102288359A (en) | 2010-06-18 | 2010-06-18 | Method for diagnosing air-conditioner pressure abnormal mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102070528A CN102288359A (en) | 2010-06-18 | 2010-06-18 | Method for diagnosing air-conditioner pressure abnormal mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102288359A true CN102288359A (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102070528A Pending CN102288359A (en) | 2010-06-18 | 2010-06-18 | Method for diagnosing air-conditioner pressure abnormal mode |
Country Status (1)
| Country | Link |
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| CN (1) | CN102288359A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748832A (en) * | 2012-06-07 | 2012-10-24 | 宁波奥克斯电气有限公司 | Air conditioning fault detection method |
| CN104090831A (en) * | 2014-07-04 | 2014-10-08 | 珠海格力电器股份有限公司 | Method for dehumidifier welding blocking self detecting |
| CN105806642A (en) * | 2016-05-23 | 2016-07-27 | 珠海格力电器股份有限公司 | Air conditioner unit detecting system and method |
| CN108648334A (en) * | 2018-04-11 | 2018-10-12 | 合肥美的智能科技有限公司 | Self-service cabinet and its abnormal method for controlling reporting, self-service system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008110711A (en) * | 2006-10-31 | 2008-05-15 | Toyota Motor Corp | Vehicle, and method for determining abnormality therein |
| CN201237409Y (en) * | 2008-06-05 | 2009-05-13 | 深圳市元征科技股份有限公司 | Coolant recovery and filling device with automobile air conditioner diagnosis function |
| CN101576441A (en) * | 2009-06-03 | 2009-11-11 | 奇瑞汽车股份有限公司 | Fault detection system of on-board air conditioner and detection method thereof |
-
2010
- 2010-06-18 CN CN2010102070528A patent/CN102288359A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008110711A (en) * | 2006-10-31 | 2008-05-15 | Toyota Motor Corp | Vehicle, and method for determining abnormality therein |
| CN201237409Y (en) * | 2008-06-05 | 2009-05-13 | 深圳市元征科技股份有限公司 | Coolant recovery and filling device with automobile air conditioner diagnosis function |
| CN101576441A (en) * | 2009-06-03 | 2009-11-11 | 奇瑞汽车股份有限公司 | Fault detection system of on-board air conditioner and detection method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748832A (en) * | 2012-06-07 | 2012-10-24 | 宁波奥克斯电气有限公司 | Air conditioning fault detection method |
| CN102748832B (en) * | 2012-06-07 | 2014-09-17 | 宁波奥克斯电气有限公司 | Air conditioning fault detection method |
| CN104090831A (en) * | 2014-07-04 | 2014-10-08 | 珠海格力电器股份有限公司 | Method for dehumidifier welding blocking self detecting |
| CN105806642A (en) * | 2016-05-23 | 2016-07-27 | 珠海格力电器股份有限公司 | Air conditioner unit detecting system and method |
| CN108648334A (en) * | 2018-04-11 | 2018-10-12 | 合肥美的智能科技有限公司 | Self-service cabinet and its abnormal method for controlling reporting, self-service system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111221 |