CN102519119A - Air conditioner with fault self-diagnosis function and fault self-diagnosis method thereof - Google Patents
Air conditioner with fault self-diagnosis function and fault self-diagnosis method thereof Download PDFInfo
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- CN102519119A CN102519119A CN201110396472XA CN201110396472A CN102519119A CN 102519119 A CN102519119 A CN 102519119A CN 201110396472X A CN201110396472X A CN 201110396472XA CN 201110396472 A CN201110396472 A CN 201110396472A CN 102519119 A CN102519119 A CN 102519119A
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- 238000004092 self-diagnosis Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 8
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000006870 function Effects 0.000 claims description 13
- 238000005057 refrigeration Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 8
- 239000003507 refrigerant Substances 0.000 abstract description 5
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 238000004378 air conditioning Methods 0.000 description 10
- 238000007689 inspection Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses an air conditioner with a fault self-diagnosis function, which comprises a processor and a refrigerating system, wherein the refrigerating system comprises a compressor, a four-way valve, a condenser, a throttling device and an evaporator. The air conditioner with the fault self-diagnosis function also comprises a return air detection assembly and an exhaust detection assembly. The return air detection assembly and the exhaust detection assembly are in communication connection with the processor. The processor also comprises a comparison unit and a display unit, wherein the comparison unit is used for comparing the data of the return air detection assembly with the data of the exhaust detection assembly so as to judge whether the working condition of the air conditioner is normal or not, and the display unit is used for displaying a comparison result. In the scheme, detection assemblies formed by sensors are additionally arranged so as to detect the changes of the temperature and the pressure of a refrigerant in the air conditioner, so that the air conditioner is capable of achieving the goal of performing fault self diagnosis on the refrigerating system, accurate fault self-diagnosis information is provided for users and maintenance, and the detection and the maintenance are convenient. Four sensors connected with an original processor of the air conditioner are additionally arranged in the air conditioner in the prior art, and corresponding programmable processing is added to achieve the fault self-diagnosis function. The air conditioner with the fault self-diagnosis function disclosed by the invention is simple and feasible and is low in improvement cost.
Description
Technical field
The present invention relates to refrigeration technology field, more particularly, relate to a kind of air-conditioner and fault self-diagnosis method thereof of tape jam self-diagnostic function.
Background technology
The fault that air-conditioning often occurs comprises lack of refrigerant, excessive discharge temperature, pipeline blockage etc.Excessive discharge temperature makes cold-producing medium and lubricating oil generation thermal decomposition, produces the impurity block system, makes accidents such as compressor copper facing, card cylinder, burning machine.Under the situation of lack of refrigerant or system jams, few through the cold-producing medium of condenser, heat exchange efficiency is on the low side, and leaving air temp is higher.
The technical staff need carry out a plurality of steps when diagnosis air-conditioning fault, as: the scope of inspection voltage; Whether the inspection screen pack cleans; Whether indoor and outdoor air inlet, air outlet be unobstructed; Whether the setup parameter of seeing air-conditioning is correct; Whether whether inspection off-premises station heat exchange situation is good, whether receives the sunlight direct projection, receive other outdoor machine of air-conditioner to blow out the influence etc. of wind, finally could really find out the place of fault.This is undoubtedly the ten minutes poor efficiency, and for the user, the difficulty of maintenance is too big.For the higher fault of some occurrence frequencies, if can realize the self diagnosis of air-conditioning, with the maintenance that makes things convenient for technical staff and user to the air-conditioning most common failure greatly.
Application number is that scheme that 200610138400.4 domestic patent " a kind of air conditioner malfunction detection method and system " is described is the fault that the difference of temperature and delivery temperature through detecting cross valve is diagnosed air-conditioner; But in this technical scheme, the air-conditioner refrigerating system fault can not be diagnosed by air-conditioner itself voluntarily.
Summary of the invention
The object of the invention is in order to overcome the deficiency that above-mentioned prior art exists, provide a kind of breakdown of refrigeration system can be low by air-conditioning detection system self diagnosis, improvement cost, simple possible, make things convenient for the air-conditioner and the fault self-diagnosis method thereof of the tape jam self-diagnostic function of user and technical staff's maintenance.
The technical scheme that the present invention adopts is: a kind of air-conditioner of tape jam self-diagnostic function; Comprise processor and the refrigeration system of forming by compressor, cross valve, condenser, throttling arrangement and evaporimeter; Also comprise return-air detection components and exhaust detection components; Said return-air detection components and exhaust detection components are connected with processor communication, thereby said processor also comprises and is used for the contrast of the data of return-air detection components and exhaust detection components is judged the comparing unit that whether normal the duty of air-conditioner is and is used for the display unit with comparison result shows.
Described return-air detection components comprises the suction temperature sensor that is used to detect suction temperature, and the back pressure sensor that is used to detect back pressure.
Described exhaust detection components comprises the exhaust gas temperature sensor that is used to detect delivery temperature, and the back pressure transducer that is used to detect pressure at expulsion.
Described return-air detection components is installed in the compressor return air oral-lateral.
Described exhaust detection components is installed in the compressor air-discharging oral-lateral.
The return-air detection components and the exhaust detection components that are connected with processor communication in the refrigeration system setting; Said return-air detection components and exhaust detection components are used to detect the temperature and pressure of compressor air-discharging and return-air, and said processor is the diagnostic system fault according to the following steps:
S1) detect compressor exhaust temperature, pressure at expulsion, suction temperature, back pressure;
S2) with step S1) numerical value that detects gained contrasts with the number range of first tabulation of processor memory, draws comparison result;
S3) search second tabulation by comparison result, as meet, then export and show and as not meeting item, then return step S1 by corresponding state code).
Compared with prior art, the present invention has the following advantages:
1, adds detection components that sensor forms to detect the variation of air-conditioner inner refrigerant temperature and pressure, make it to be able to, for user and maintenance provide the fault self-diagnosis information of preparation, the convenient detection and maintenance to the breakdown of refrigeration system self diagnosis;
2, this programme adds four sensors that connect the original processors of air-conditioner in the air-conditioner of prior art, and adds that corresponding programmed process realizes self-diagnostic function, and simple possible, improvement cost are low.
Description of drawings
Fig. 1 is the structural representation of the air-conditioner of a kind of tape jam self-diagnostic function of the present invention;
Fig. 2 is a fault self-diagnosis schematic flow sheet of the present invention.
The parts that each label is represented in the accompanying drawing are following:
1 compressor, 2 cross valves, 3 condensers, 4 throttling arrangements, 5 evaporimeters, 6 exhaust gas temperature sensors, 7 back pressure transducers, 8 suction temperature sensors, 9 back pressure sensors.
The specific embodiment
The present invention is a kind of air-conditioner of tape jam self-diagnostic function; On the basis of the air-conditioner of prior art; Exhaust outlet at compressor 1 is provided with exhaust gas temperature sensor 6 and back pressure transducer 7, at the return-air mouth suction temperature sensor 8 and back pressure sensor 9 is set, and the data that processor returns according to each sensor are judged the working condition of air-conditioning, the fault of diagnosis air-conditioning.
Cold-producing medium moves in the kind of refrigeration cycle of air-conditioner, and neither endothermic nor exothermic in the gas-liquid two-phase conversion is to reach the effect of heat exchange refrigeration.When air-conditioning stable operation, kind of refrigeration cycle inner refrigerant temperature and pressure in cyclic process changes with certain rules.As shown in Figure 1, be example with the refrigeration mode, the cold-producing medium of high-temperature low-pressure gets into compressor 1; Become HTHP through overcompression,, get into condenser 3 radiating and coolings again by cross valve 2 water conservancy diversion; Cold-producing medium becomes the cryogenic high pressure state, and the cold-producing medium of cryogenic high pressure gets into evaporimeter 5 through throttling arrangement 4, and heat absorption is vaporizated into high-temperature low-pressure; Get into compressor 1 once more, get into the circulation of next round.Air-conditioner is under the situation of operate as normal; The delivery temperature of compressor 1 is below 100 ℃; Suction temperature between 8 ℃ to 20 degrees centigrade, the pressure at expulsion of the situation lower compression machine 1 that cold-producing medium is sufficient should 16KG between the 22KG, back pressure should be at 3KG between the 7KG.
The air-conditioner of a kind of tape jam self-diagnostic function of the present invention; Exhaust gas temperature sensor 6 and back pressure transducer 7 in the setting of compressor 1 exhaust outlet; Exhaust gas temperature sensor 6 detects the delivery temperature of compressor, and back pressure transducer 7 detects the pressure at expulsion of compressor.
Suction temperature sensor 8 and back pressure sensor 9 that compressor 1 return-air mouth is provided with, suction temperature sensor 8 detects the suction temperature of compressor 1, and back pressure sensor 9 detects the back pressure of compressor 1.
More than the detection data in real time of four sensors feed back to the processor of air-conditioner, processor calls the fault type that corresponding fault diagnostic program is judged air-conditioning, flow process is as shown in Figure 2.
Referring to table 1-2, as follows:
Table 1: first tabulation
| Delivery temperature | ≤100℃ | ＞100℃ | |
| Pressure at expulsion | ＜16KG | ≥16KG，≤22KG | ＞22KG |
| Suction temperature | ＜8℃ | ≥8℃，≤20℃ | ＞20℃ |
| Back pressure | ＜3KG | ≥3KG，≤7KG | ＞7KG |
| Diagnostic result | Low | Normally | High |
Table 2: second tabulation
Fault diagnostic program the rule as follows:
When delivery temperature is less than or equal to 100 ℃, judge that delivery temperature is normal; When delivery temperature is higher than 100 ℃, judge that delivery temperature is too high;
When pressure at expulsion is lower than 16KG, judge that pressure at expulsion is low for excessively; When pressure at expulsion is higher than 16KG and is lower than 22KG, judge that pressure at expulsion is normal; When pressure at expulsion is higher than 22KG, judge that pressure at expulsion is too high;
When suction temperature is lower than 8 ℃, judge that suction temperature is low for excessively; Suction temperature is higher than 8 ℃ and when being lower than 20 ℃, judges that suction temperature is normal; When suction temperature is higher than 20 ℃, judge that suction temperature is too high;
When back pressure is lower than 3KG, judge that back pressure is low for excessively; When back pressure is higher than 3KG and is lower than 7KG, judge that back pressure is normal; When back pressure is higher than 7KG, judge that back pressure is too high.
When detecting excessive discharge temperature, but pressure at expulsion, suction temperature and back pressure are all just often, and system shows that failure code is E1, the too high fault of expression system exhaust temperature;
When detecting excessive discharge temperature or normal, pressure at expulsion is high, but suction temperature and back pressure are all just often, and system shows that failure code is E2, expression system operating pressure fault;
When detecting excessive discharge temperature, pressure at expulsion is low excessively, and suction temperature is too high, and back pressure is crossed when hanging down, the few fluorine fault of expression refrigeration system, and system shows that failure code is E 3;
When detecting excessive discharge temperature, pressure at expulsion is too high, and return air temperature is spent low, and back pressure is crossed when hanging down, expression system throttling arrangement plugging fault, and system shows that failure code is E4.
The present invention is according to technical staff's the experience and the result of test; The fault frequent species or the reason of system have been summed up; And the number range of definite its judgement; Maintenance personal or testing crew can fast and effeciently take appropriate measures according to the demonstration of processor, can effectively avoid the generation of the system failure.
Claims (6)
1. the air-conditioner of a tape jam self-diagnostic function; Comprise processor and the refrigeration system of forming by compressor, cross valve, condenser, throttling arrangement and evaporimeter; It is characterized in that: also comprise return-air detection components and exhaust detection components; Said return-air detection components and exhaust detection components are connected with processor communication, thereby said processor also comprises and is used for the contrast of the data of return-air detection components and exhaust detection components is judged the comparing unit that whether normal the duty of air-conditioner is and is used for the display unit with comparison result shows.
2. the air-conditioner of tape jam self-diagnostic function according to claim 1 is characterized in that: described return-air detection components comprises the suction temperature sensor that is used to detect suction temperature, and the back pressure sensor that is used to detect back pressure.
3. the air-conditioner of tape jam self-diagnostic function according to claim 1 is characterized in that: described exhaust detection components comprises the exhaust gas temperature sensor that is used to detect delivery temperature, and the back pressure transducer that is used to detect pressure at expulsion.
4. according to the air-conditioner of claim 1 or 2 or 3 described tape jam self-diagnostic functions, it is characterized in that: described return-air detection components is installed in the compressor return air oral-lateral.
5. according to the air-conditioner of claim 1 or 2 or 3 described tape jam self-diagnostic functions, it is characterized in that: described exhaust detection components is installed in the compressor air-discharging oral-lateral.
6. the fault self-diagnosis method of an air-conditioner; It is characterized in that: the return-air detection components and the exhaust detection components that are connected with processor communication in the refrigeration system setting; Said return-air detection components and exhaust detection components are used to detect the temperature and pressure of compressor air-discharging and return-air, and said processor is the diagnostic system fault according to the following steps:
S1) detect compressor exhaust temperature, pressure at expulsion, suction temperature, back pressure;
S2) with step S1) numerical value that detects gained contrasts with the number range of first tabulation of processor memory, draws comparison result;
S3) search second tabulation by comparison result, as meet, then export and show and as not meeting item, then return step S1 by corresponding state code).
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| CN110398115A (en) * | 2019-07-13 | 2019-11-01 | 深圳市穗深冷气设备有限公司 | A kind of separating refrigerating interlocking set |
| CN111207484B (en) * | 2019-12-13 | 2021-01-19 | 浙江大学 | Central air-conditioning system fault diagnosis method based on object-oriented Bayesian network |
| CN111207484A (en) * | 2019-12-13 | 2020-05-29 | 浙江大学 | Central air-conditioning system fault diagnosis method based on object-oriented Bayesian network |
| CN112393463A (en) * | 2020-11-18 | 2021-02-23 | 广东纽恩泰新能源科技发展有限公司 | Self-adaptive adjustment method for temperature probe fault of air source heat pump system |
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Application publication date: 20120627 |