CN101814717A - Compressor protection method for air conditioner - Google Patents
Compressor protection method for air conditioner Download PDFInfo
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- CN101814717A CN101814717A CN201010141657A CN201010141657A CN101814717A CN 101814717 A CN101814717 A CN 101814717A CN 201010141657 A CN201010141657 A CN 201010141657A CN 201010141657 A CN201010141657 A CN 201010141657A CN 101814717 A CN101814717 A CN 101814717A
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Abstract
The invention discloses a compressor protection method for an air conditioner, which is characterized by comprising the following operating steps of: 1, starting up, and beginning to count through a counter in the air conditioner, wherein N is equal to 0; 2, running; 3, switching on a compressor relay by using an electric control device of the air conditioner, and beginning to detect the current of the whole machine after t seconds, wherein the value range of the t is 1 to 100 seconds, and steps 4 and 7 are to be executed simultaneously; and 4, judging whether the current is smaller than a safety value I2, if so, entering a step 5, otherwise returning to the step 2. The conventional air conditioner system is not needed to be modified, and a software control part is needed to be modified only, so the compressor of the air conditioner can be ensured not to be burnt out under the abnormal condition and the aim of protecting the compressor is achieved; and the compressor has the advantages of simple and reasonable structure, flexible operation, high safety degree and wide application range.
Description
Technical field
The present invention relates to the compressor protection method of a kind of compressor protection method, particularly a kind of air conditioner.
Background technology
Compressor is the core component of domestic air conditioner, after system goes wrong, if protect badly, will burn out compressor, for example, at system's coolant leakage, exist under the situations such as card cylinder or foreign matter, when still switching on, tend to burn out compressor to compressor.
In the present domestic air conditioner design, considered the protection of system under the normal condition, still, but do not set for the protection of abnormal conditions lower compression machine.In existing design, see accompanying drawing 2, at first being start, operation, then is to detect the complete machine electric current, if there is the card cylinder in compressor because of a variety of causes, but electric control gear is still switched on to compressor, then current anomaly is big, when electric current occurring greater than safety value I1, and the OLP protector action that compressor carries, shut down this moment, and the waiting system balance; After OLP protector action, recover in the certain hour, energising more afterwards, it is big to occur current anomaly heavily again, and when electric current during once more greater than safety value I1, the OLP protector that compressor carries moves once more, and so repeatedly, then the motor of compressor is burnt out.
The automatically controlled design of existing air conditioner as shown in Figure 1, comprises indoor and outside.The main current loop of compressor is provided with current transformer 12; can detect the current value of compressor; also be provided with a compressor OLP protector 11 on the main current loop of compressor; this OLP protector 11 is mechanical protection devices; when excessive and temperature is higher when electric current; the bimetal leaf of OLP protector 11 opens circuit, and compressor quits work.
When compressor card cylinder; the electric control gear compressor relay 4 that closes; compressor 6 gets electric, but because of the card cylinder, compressor 6 fails normally to move; immediate current is very big; greater than safety value I1,11 actions of compressor OLP protector, but this time; the memory of master chip in the electric control gear be still the compressor opening; compressor relay 4 is still switched on, and after 11 actions of OLP protector, waits for a period of time; close once more; this stand-by period is relevant with ambient temperature, and when closing once more, OLP protector 11 is action once more; so go down, the motor of compressor can be burnt out.
Summary of the invention
Purpose of the present invention aims to provide the compressor protection method of a kind of simple and reasonable, flexible operation, safe coefficient height, air conditioner applied widely, to overcome weak point of the prior art.
Press the compressor protection method of a kind of air conditioner of this purpose design, it is characterized in that comprising following operating procedure:
The first step, start begins to count N=0 by the counter in the air conditioner; Next carried out for second step;
Second step, operation; Next carried out for the 3rd step;
In the 3rd step, the electric control gear of the air conditioner compressor relay that closes begins to detect the complete machine electric current at t subsequently after second; The span of t is 1～100 second; Next carried out for the 4th step and the 7th step;
In the 4th step, whether judge electric current less than safety value I2, if "No" then returned for second step, if "Yes" then entered for the 5th step; The span of safety value I2 is-0.5～0.5A;
In the 5th step, judge whether supply relay closes, if "No" then returned for second step, if "Yes" then entered for the 6th step;
The 6th step, rolling counters forward: N=N+1; Next carried out for the 8th step;
In the 7th step, whether judge electric current greater than safety value I1, if "No" then returned for second step, if "Yes" then entered for the 8th step; The span of safety value I1 is 6～50A;
In the 8th step, shut down; Next carried out for the 9th step;
The 9th step, the waiting system balance; Next carried out for the tenth step;
In the tenth step, whether judge N in the counter less than 2, if "Yes" then, is returned second and gone on foot, if "No" then entered for the 11 step after the time at T; T was more than or equal to three minutes;
The 11 step, shut down, show fault, wait for maintenance.
The span of described t is 3～10 seconds.
The present invention does not need to change existing air-conditioner system; only need the change software control part; the compressor that just can guarantee air conditioner is unlikely under abnormal conditions and burns out; thereby reach the purpose of protection compressor, it has simple and reasonable, flexible operation, safe coefficient height, advantage of wide range of application.
Description of drawings
Fig. 1 is the system line connection layout of existing air conditioner.
Fig. 2 is the control flow chart of existing air conditioner.
The control flow chart of Fig. 3 one embodiment of the invention.
Among the figure: 1 is power supply; 2 is the outdoor fan relay, and 3 is the solenoid operated four-way valve relay, and 4 is compressor relay; 5 is solenoid operated four-way valve; 6 is compressor, and 7 is compressor electric capacity, and 8 is outdoor fan; 9 is blower fan electric capacity; 10 is the outdoor machine wire connection seat, and 11 is compressor OLP protector, and 12 is current transformer.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 3, when the electric control gear of air conditioner detects when needing to start compressor, the counter that is used to remember the compressor state in the electric control gear is for opening, and electric control gear closes after the compressor relay, and t begins to detect the electric current of compressor after second.The span of t is 1～100 second.In the ordinary course of things, the span of t is 3～10 seconds.
If compressor is in normal operation at this moment, then its current value is certain to greater than certain numerical value so, just greater than safety value I2.If the electric current of finding compressor is less than safety value I2, and the state that counter write down of band memory in the electric control gear is that compressor is opened, and it is unusual to think that then compressor occurs, and thinks that compressor OLP protector moves, the compressor that then breaks at once.
Safety value I2 is a kind of current value of abnormal conditions, is 0 in theory, but because electric control gear accuracy of detection problem, generally can only reach positive and negative 0.5A, gets one on engineering is used and approaches 0 numerical value and represent.
When the motor of the compressor of air conditioner ran well, the current value of little one compressor all can be greater than 1A, and the 1A of this moment is greater than safety value I2.Air conditioner with 1HP is an example again, and when the motor of its compressor ran well, its current value also can be greater than 2A, and 2A is also greater than safety value I2.
Except considering above-mentioned safety value I2, when compressor normally moves, also have an overcurrent protection value, just the current value of safety value I1 needs and compressor compares.Safety value I1 is relevant in the rated current under the rated voltage with compressor, this safety value I1 is comparatively reasonable with about 2 times settings of load current value usually, air conditioner with little 1HP is an example, load current value is generally about 3.5A, look the Energy Efficiency Ratio height, have certain deviation, its safety value I1 is provided with should be greater than 6A, number is high more, and its safety value I1 is provided with just big more.The span of the safety value I1 of domestic air conditioning is generally 6～50A.
Air-conditioning with certain 2HP is an example: when the electric control gear of air conditioner detects needs startup compressor; the electric control gear compressor relay that closes; begin to detect the electric current of compressor subsequently after second at t=5; if the electric current of finding compressor is less than safety value I2; can be provided with safety value I2 this moment is 0.5A; it is unusual to think that then compressor occurs, and compressor OLP protector begins action, the power supply of the compressor that breaks at once.Because the air conditioner of 2HP is normally freezing or heating under the situation, its compressor current all can not show that less than 0.5A compressor does not move less than 0.5A.Because the precision problem of current transformer is got 0.5A as judgment value.
T=3 divides after the clock time, and once more to the compressor energising, if occur above-mentioned situation once more, then air conditioner is no longer to the compressor energising, and newspaper compressor fault code cannot recover automatically.Expression needs repairing.
Claims (2)
1. the compressor protection method of an air conditioner is characterized in that comprising following operating procedure:
The first step, start begins to count N=0 by the counter in the air conditioner; Next carried out for second step;
Second step, operation; Next carried out for the 3rd step;
In the 3rd step, the electric control gear of the air conditioner compressor relay that closes begins to detect the complete machine electric current at t subsequently after second; The span of t is 1～100 second; Next carried out for the 4th step and the 7th step;
In the 4th step, whether judge electric current less than safety value I2, if "No" then returned for second step, if "Yes" then entered for the 5th step; The span of safety value I2 is-0.5～0.5A;
In the 5th step, judge whether supply relay closes, if "No" then returned for second step, if "Yes" then entered for the 6th step;
The 6th step, rolling counters forward: N=N+1; Next carried out for the 8th step;
In the 7th step, whether judge electric current greater than safety value I1, if "No" then returned for second step, if "Yes" then entered for the 8th step; The span of safety value I1 is 6～50A;
In the 8th step, shut down; Next carried out for the 9th step;
The 9th step, the waiting system balance; Next carried out for the tenth step;
In the tenth step, whether judge N in the counter less than 2, if "Yes" then, is returned second and gone on foot, if "No" then entered for the 11 step after the time at T; T was more than or equal to three minutes;
The 11 step, shut down, show fault, wait for maintenance.
2. the compressor protection method of air conditioner according to claim 1, the span that it is characterized in that described t is 3～10 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010141657A CN101814717A (en) | 2010-04-01 | 2010-04-01 | Compressor protection method for air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010141657A CN101814717A (en) | 2010-04-01 | 2010-04-01 | Compressor protection method for air conditioner |
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| CN101814717A true CN101814717A (en) | 2010-08-25 |
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| CN201010141657A Pending CN101814717A (en) | 2010-04-01 | 2010-04-01 | Compressor protection method for air conditioner |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761103A (en) * | 2012-02-24 | 2012-10-31 | 珠海格力电器股份有限公司 | Compressor demagnetization protection circuit and demagnetization protection method and air conditioner |
| CN104617554A (en) * | 2011-11-18 | 2015-05-13 | 广东美芝制冷设备有限公司 | Protection method for preventing inverter compressor against demagnetization |
| CN104638616A (en) * | 2014-12-29 | 2015-05-20 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and voltage-surge-proof protection method and device for variable-frequency air conditioner |
| CN104764164A (en) * | 2015-04-09 | 2015-07-08 | 宁波奥克斯电气有限公司 | Method for judging whether alternating-current contactor of air conditioner is adhered or not |
| CN106019065A (en) * | 2016-05-04 | 2016-10-12 | 广东美的暖通设备有限公司 | Air conditioner compressor contactor adhesion detection method, system and device and air conditioner |
| CN106257161A (en) * | 2016-07-27 | 2016-12-28 | 海信（山东）空调有限公司 | Cooler compressor Anti-burnout control method and air-conditioner |
| CN107477773A (en) * | 2017-07-25 | 2017-12-15 | 广东美的制冷设备有限公司 | Air conditioner and its control method and control device |
| CN108050663A (en) * | 2017-12-01 | 2018-05-18 | 广东美的制冷设备有限公司 | Control method and device, air-conditioning and the storage medium of compressor self-shield |
| WO2022134871A1 (en) * | 2020-12-22 | 2022-06-30 | 珠海格力电器股份有限公司 | Air conditioner operation control method and apparatus, and air conditioner and computer-readable storage medium |
-
2010
- 2010-04-01 CN CN201010141657A patent/CN101814717A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617554A (en) * | 2011-11-18 | 2015-05-13 | 广东美芝制冷设备有限公司 | Protection method for preventing inverter compressor against demagnetization |
| CN102761103B (en) * | 2012-02-24 | 2013-05-29 | 珠海格力电器股份有限公司 | Compressor demagnetization protection circuit and demagnetization protection method and air conditioner |
| CN102761103A (en) * | 2012-02-24 | 2012-10-31 | 珠海格力电器股份有限公司 | Compressor demagnetization protection circuit and demagnetization protection method and air conditioner |
| CN104638616A (en) * | 2014-12-29 | 2015-05-20 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and voltage-surge-proof protection method and device for variable-frequency air conditioner |
| CN104638616B (en) * | 2014-12-29 | 2017-06-27 | 广东美的制冷设备有限公司 | Anti- voltage surge protection method, the device of transducer air conditioning and transducer air conditioning |
| CN104764164B (en) * | 2015-04-09 | 2017-08-15 | 宁波奥克斯电气股份有限公司 | Judge the method for the whether viscous connection of A.C. contactor of air conditioner |
| CN104764164A (en) * | 2015-04-09 | 2015-07-08 | 宁波奥克斯电气有限公司 | Method for judging whether alternating-current contactor of air conditioner is adhered or not |
| CN106019065A (en) * | 2016-05-04 | 2016-10-12 | 广东美的暖通设备有限公司 | Air conditioner compressor contactor adhesion detection method, system and device and air conditioner |
| CN106257161A (en) * | 2016-07-27 | 2016-12-28 | 海信（山东）空调有限公司 | Cooler compressor Anti-burnout control method and air-conditioner |
| CN106257161B (en) * | 2016-07-27 | 2019-09-10 | 海信（山东）空调有限公司 | Cooler compressor Anti-burnout control method and air conditioner |
| CN107477773A (en) * | 2017-07-25 | 2017-12-15 | 广东美的制冷设备有限公司 | Air conditioner and its control method and control device |
| CN108050663A (en) * | 2017-12-01 | 2018-05-18 | 广东美的制冷设备有限公司 | Control method and device, air-conditioning and the storage medium of compressor self-shield |
| CN108050663B (en) * | 2017-12-01 | 2021-04-09 | 广东美的制冷设备有限公司 | Control method and device for self-protection of compressor, air conditioner and storage medium |
| WO2022134871A1 (en) * | 2020-12-22 | 2022-06-30 | 珠海格力电器股份有限公司 | Air conditioner operation control method and apparatus, and air conditioner and computer-readable storage medium |
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Application publication date: 20100825 |