CN107289599A - A kind of apparatus and method for detecting air conditioner coolant amount of leakage - Google Patents
A kind of apparatus and method for detecting air conditioner coolant amount of leakage Download PDFInfo
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- CN107289599A CN107289599A CN201710681481.0A CN201710681481A CN107289599A CN 107289599 A CN107289599 A CN 107289599A CN 201710681481 A CN201710681481 A CN 201710681481A CN 107289599 A CN107289599 A CN 107289599A
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- Prior art keywords
- degree
- leakage
- air conditioner
- superheat
- compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
- F25B2700/21171—Temperatures of an evaporator of the fluid cooled by the evaporator
- F25B2700/21172—Temperatures of an evaporator of the fluid cooled by the evaporator at the inlet
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of leakage rate X=F (TW, f, T, L, the T of the method, wherein refrigerant for detecting air conditioner coolant amount of leakageZY) function, wherein TW be outdoor temperature, f be compressor operating frequency, T be compressor operation duration, L is length of pipe, TZYThe temperature difference produced for evaporator outlet temperature sensor to compressor inlet temperature sensor.The present invention also provides a kind of device for detecting air conditioner coolant amount of leakage.The shell of air-conditioning need not be opened the invention provides a kind of, the method with regard to coolant leakage can be judged, or even the leakage quantity of refrigerant can also be judged.So not only can conveniently it repair, moreover it is possible to reduce the workload of maintenance.
Description
Technical field
The present invention relates to a kind of detection of air-conditioning control method, and in particular to a kind of device of detection air conditioner coolant amount of leakage and
Method, belongs to air conditioner controlling technology field.
Background technology
Air-conditioning has become a part for people's life, really improves people as refrigeration or heating equipment
The comfortableness of life.
It is generally swollen using the method regulation air-conditioning equipment internal electron of the control compressor air suction degree of superheat in air-conditioning equipment
Swollen valve is opened or closed, so that equipment can normally be run.
Typically when actual suction superheat is more than target suction superheat, the aperture increase of electric expansion valve；It is actual to inhale
When the gas degree of superheat is less than target suction superheat, the aperture of electric expansion valve reduces；Actual suction superheat is equal to target air-breathing
During the degree of superheat, the aperture of electric expansion valve is constant.
In order to which control is better achieved, air-conditioning needs detection temperature, and the function of air-conditioning is realized by this variable of temperature.
The biography for detecting the degree of superheat and degree of supercooling is equipped with if the technical scheme that Patent No. CN200910203600.7 is provided
The injection expansion valve of the sensor refrigerant amount sprayed with that can adjust, thus refrigerating operaton time control refrigeration condenser outlet side
Degree of supercooling, and the degree of superheat of sprayed refrigerant is controlled during heating operation, so as to be sprayed in refrigerating operaton and heating operation
Most suitable refrigerant amount, so as to can ensure that the reliability of system under any cooling and warming service condition.
Such as, the technical scheme that Patent No. CN200710112061.7 is provided is a kind of method of electric expansion valve, prison
The open degree of electric expansion valve is controlled, while adjusting the degree of superheat by the open degree for changing electric expansion valve；When electric expansion valve
When open degree is by abnormal change, modification determines the open degree calculation formula of open degree size；Calculated with according to the open degree of modification
Formula, adjusts the open degree of electric expansion valve.
And for example, the technical scheme that Patent No. CN200510015731.4 is provided is a kind of control of compressor exhaust temperature
Method processed, passes through the stage for perceiving exhaust outlet of compressor temperature and being judged according to sensing results and being controlled.Perceive compressor
Exhaust port temperatures and the stage judged according to sensing results, have and judge whether exhaust outlet of compressor temperature is more than design temperature
Stage, when more than when, increase linear expansion valve aperture stage.The technical scheme is that indoor set is exported at existing
On the basis of refrigerant pipe temperature is controlled, the control to exhaust outlet of compressor temperature is added.That is, when in exhaust port temperatures
In the case of too high, the preferential linear expansion valve control logic for carrying out reduction exhaust port temperatures.Avoid " degree of superheat is met, but
Overall aperture is too small " un-reasonable phenomenon, make air-conditioning whole system operation more rationalize.
It can be seen that, temperature it is whether accurate, directly influence the normal operation of air-conditioning.But above-mentioned technical scheme, substantially
Employ the technical scheme of degree of supercooling or the degree of superheat to control the normal operation of air-conditioning, use common temperature sensor,
The precision of detection is 1 degree.A kind of technical scheme can be used, existing temperature accuracy is further improved, passes through accurate temperature controlling
Technology to control the aperture of electric expansion valve, reach the purpose more saved.The present invention exactly uses a kind of new technical side
Case, solves the technical problem of energy-conservation and comfortableness.
But, the air-conditioning of longtime running, in outside environment, the insulating barrier of indoor set and outdoor machines holds
It is vulnerable to destruction or damages.If the insulating barrier of the connecting line is easily destroyed or damaged, the waste of the energy is necessarily caused.
The air-conditioning of longtime running, it may occur that leakage refrigerant, causes the compressor damage or refrigeration of air-conditioning undesirable.How to find
A kind of efficiently method, detects the refrigerant of air-conditioning, and whether such as freon refrigerant have leaked, and without opening the outer of air-conditioning
Shell, this is open question in the prior art.
The content of the invention
It is an object of the invention to overcome the defect of prior art there is provided it is a kind of can quick detection secondary refrigerant leakage, and can sentence
The method of the detection air conditioner coolant amount of leakage of disconnected secondary refrigerant leakage quantity.
What the present invention was realized in：
A kind of method for detecting air conditioner coolant amount of leakage, leakage rate X=F (TW, f, T, L, the T of refrigerantZY) function, wherein
TW is outdoor temperature, and f is the operating frequency of compressor, and T is the duration of compressor operation, and L is length of pipe, TZYGo out for evaporator
The temperature difference that mouth temperature sensor is produced to compressor inlet temperature sensor.
Further scheme is：
Work as TZYFor 6 to 10 degree, f=20 to 50hz, T=1~3 minute, compressor of air conditioner is instructed with 30Hz operating frequency
Operation 1 to 3 minutes, TZYSubstantially it is unchanged, represent that refrigerant has lacked.
Further scheme is：
Work as TZYFor 6 to 10 degree, f=20 to 50hz, T=3~5 minute, compressor of air conditioner is instructed with 30Hz operating frequency
Run 3 to 5 minutes, TZYSubstantially it is unchanged, represent that refrigerant lacks more than 50%.
Further scheme is：
Work as TZYFor 6 to 10 degree, f=20 to 50hz, T=5~10 minute, compressor of air conditioner is instructed with 30Hz operating frequency
Run 5 to 10 minutes, TZYSubstantially it is unchanged, represent that refrigerant is revealed completely.
Further scheme is：
The method for detecting air conditioner coolant amount of leakage, specifically includes following steps：
Step 1: output squeezing machine operation instruction, and tune up or turn down the aperture of electric expansion valve；
Step 2: recording real-time super heat value；
Step 3: being compared according to real-time 3rd degree of superheat calculated with the default degree of superheat；
Step 4: when the 3rd degree of superheat does not change or changes excessive；The feedback control of the 3rd degree of superheat is carried out, is sentenced
The result whether disconnected refrigerant is revealed.
Further scheme is：
3rd degree of superheat does not change, and refers to the change of the 3rd degree of superheat at 0 degree to 1 degree.
Further scheme is：
The change of 3rd degree of superheat is excessive, when referring to turn down, changes more than 4 degree.
Further scheme is：
When judging that refrigerant lacks, the protection of machine is compressed.
Another object of the present invention, which is also resided in, provides a kind of device for detecting air conditioner coolant amount of leakage, including degree of superheat control
Unit processed, CPU, 2 temperature sensors are set in the air inlet position of the export compressor of evaporator respectively；Temperature
The temperature sampling cycle for spending sensor is 0.1~1 second, and CPU is passed according to 2 temperature on evaporator and/or compressor
The temperature gap of sensor, calculates the degree of superheat or degree of supercooling and rate temperature change and direction, after operation a period of time, utilizes
Claim 1 to 8 any claim methods described judges the quantity of refrigerant, and result is notified into user.
Further scheme is：
The temperature sensor uses temperature sensors of high precision, and measurement accuracy is 0.1 DEG C~3 DEG C.
The shell of air-conditioning need not be opened the invention provides a kind of, the method with regard to coolant leakage can be judged, or even also
The leakage quantity of refrigerant can be judged.So not only can conveniently it repair, moreover it is possible to reduce the workload of maintenance.
Brief description of the drawings
Fig. 1 detects the method flow diagram of air conditioner coolant amount of leakage for the present invention.
Embodiment
Technical scheme is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the method for detecting air conditioner coolant amount of leakage, specifically using following steps：
Step 1: output squeezing machine operation instruction, and tune up or turn down the aperture of electric expansion valve；
Step 2: recording real-time super heat value；
Step 3: being compared according to real-time 3rd degree of superheat calculated with the default degree of superheat；
Step 4: when the 3rd degree of superheat does not change (1 degree or 0 degree or so) or changes excessive (when turning down, more than 10
Degree)；The feedback control of the 3rd degree of superheat is carried out, the result whether refrigerant is revealed is judged.
In step 4, the feedback control of the 3rd degree of superheat is carried out, the result whether refrigerant is revealed is judged, be specially：
Set leakage rate X=F (TW, f, T, L, the T of refrigerantZY) function, wherein TW is outdoor temperature, and f is compressor
Operating frequency, T is the duration of compressor operation, and L is length of pipe, TZYFor evaporator outlet temperature sensor to compressor air inlet
The temperature difference that mouth temperature sensor is produced,
Work as TZYFor 6 to 10 degree, f=20 to 50hz, T=1~3 minute, compressor of air conditioner is instructed with 30Hz operating frequency
Operation 1 to 3 minutes, TZYChange is there is no, illustrates that refrigerant has lacked.
Work as TZYFor 6 to 10 degree, f=20 to 50hz, T=3~5 minute, compressor of air conditioner is instructed with 30Hz operating frequency
Run 3 to 5 minutes, TZYChange is there is no, illustrates that refrigerant lacks more than 50%.
Work as TZYFor 6 to 10 degree, f=20 to 50hz, T=5~10 minute, compressor of air conditioner is instructed with 30Hz operating frequency
Run 5 to 10 minutes, TZYChange is there is no, illustrates that refrigerant has substantially been revealed and is over.
Further scheme is：
When judging that refrigerant lacks, the protection of machine is compressed.
It is another object of the present invention to provide a kind of device for detecting air conditioner coolant amount of leakage, including degree of superheat control
Unit, CPU, 2 temperature sensors are set in the air inlet position of the export compressor of evaporator respectively；Temperature
The temperature sampling cycle of sensor is 0.1~1 second, and CPU is according to 2 TEMPs on evaporator and/or compressor
The temperature gap of device, calculates the degree of superheat or degree of supercooling and rate temperature change and direction, after operation a period of time, utilizes this
The method of invention judges the quantity of refrigerant, and result is notified into user.
Further scheme is：
Temperature sensor uses temperature sensors of high precision, and measurement accuracy is 0.1 DEG C~3 DEG C.
The present invention is in specific implementation, under certain ambient temperature, between such as 25 degree to 35 degree, runs air-conditioning, makes air-conditioning
In refrigerating state, the operation instruction certain to air-conditioning, such as 30Hz operation instruction, now, the indoor set and outdoor unit of air-conditioning
Connecting line be it is certain, generally 4 meters, along with one section of pipeline before compressor inlet, typically not over 6
Rice (under normal circumstances), in the case of the basic thermal insulation of connecting line, and in the case of load necessarily, evaporator outlet now
Temperature sensor can change over time to the temperature difference that compressor inlet temperature sensor is produced, this
Temperature difference can progressively diminish, until whereabouts is in zero.If under normal circumstances, this TZYSpent for 6 to 10, if air-conditioning is according to 30Hz
Operation instruction run 1 to 3 minutes, the TZYIt there is no change, it may be said that bright refrigerant has lacked.
Further, if under normal circumstances, this TZYSpent for 6 to 10, if air-conditioning is run according to 30Hz operation instruction
3~5 minutes, the TZYIt there is no change, it may be said that bright refrigerant is estimated to lack more than 50%.
Further, if under normal circumstances, this TZYSpent for 6 to 10, if air-conditioning is run according to 30Hz operation instruction
5 to 10 minutes, the TZYIt there is no change, it may be said that estimated substantially revealed of bright refrigerant is over.
The control method of the degree of superheat, to solve the technical problem of above-mentioned suitable control cold medium flux.In refrigeration, air-conditioning
The air inlet of compressor one temperature sensor is set, on the basis of original double degrees of superheat are controlled, be further added by a mistake
Temperature is controlled, i.e., the 3rd degree of superheat, and the 3rd degree of superheat has temperature sensor and the indoor set gas outlet of compressor inlet
The temperature gap of temperature.
If the insulating barrier on the air conditioner connecting pipe road is easily destroyed or damaged, the waste of the energy is necessarily caused.This hair
Bright embodiment, can also be solved in outside environment, the insulating barriers of indoor set and outdoor machines easily by
Destruction damages the problem of causing energy waste.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferably embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modification and embodiment, and these modifications and embodiment will fall in principle disclosed in the present application
Within scope and spirit.
Claims (10)
1. a kind of method for detecting air conditioner coolant amount of leakage, it is characterised in that：
Leakage rate X=F (TW, f, T, L, the T of refrigerantZY) function, wherein TW be outdoor temperature, f be compressor operating frequency,
T is the duration of compressor operation, and L is length of pipe, TZYPassed for evaporator outlet temperature sensor to compressor inlet temperature
The temperature difference that sensor is produced.
2. the method for air conditioner coolant amount of leakage is detected according to claim 1, it is characterised in that：
Work as TZYSpent for 6 to 10, f=20 to 50hz, T=1~3 minute, compressor of air conditioner is with 30Hz operating frequency instruction operation 1
To 3 minutes, TZYSubstantially it is unchanged, represent that refrigerant has lacked.
3. the method for air conditioner coolant amount of leakage is detected according to claim 1, it is characterised in that：
Work as TZYSpent for 6 to 10, f=20 to 50hz, T=3~5 minute, compressor of air conditioner is with 30Hz operating frequency instruction operation
3 to 5 minutes, TZYSubstantially it is unchanged, represent that refrigerant lacks more than 50%.
4. the method for air conditioner coolant amount of leakage is detected according to claim 1, it is characterised in that：
Work as TZYSpent for 6 to 10, f=20 to 50hz, T=5~10 minute, compressor of air conditioner is with 30Hz operating frequency instruction operation
5 to 10 minutes, TZYSubstantially it is unchanged, represent that refrigerant is revealed completely.
5. the method for air conditioner coolant amount of leakage is detected according to Claims 1-4 any claim, it is characterised in that：
Specifically include following steps：
Step 1: output squeezing machine operation instruction, and tune up or turn down the aperture of electric expansion valve；
Step 2: recording real-time super heat value；
Step 3: being compared according to real-time 3rd degree of superheat calculated with the default degree of superheat；
Step 4: when the 3rd degree of superheat does not change or changes excessive；The feedback control of the 3rd degree of superheat is carried out, judges cold
The result whether matchmaker reveals.
6. the method for air conditioner coolant amount of leakage is detected according to claim 5, it is characterised in that：
3rd degree of superheat does not change, and refers to the change of the 3rd degree of superheat at 0 degree to 1 degree.
7. the method for air conditioner coolant amount of leakage is detected according to claim 5, it is characterised in that：
The change of 3rd degree of superheat is excessive, when referring to turn down, changes more than 4 degree.
8. the method for air conditioner coolant amount of leakage is detected according to claim 5, it is characterised in that：
When judging that refrigerant lacks, the protection of machine is compressed.
9. a kind of device for detecting air conditioner coolant amount of leakage, it is characterised in that：It is single including degree of superheat control unit, center processing
Member, 2 temperature sensors are set in the air inlet position of the export compressor of evaporator respectively；The temperature sampling of temperature sensor
Cycle is 0.1~1 second, and CPU is according to the temperature gap of 2 temperature sensors on evaporator and/or compressor, meter
The degree of superheat or degree of supercooling and rate temperature change and direction are calculated, it is any using claim 1 to 8 after operation a period of time
Claim methods described judges the quantity of refrigerant, and result is notified into user.
10. the device of air conditioner coolant amount of leakage is detected according to claim 9, it is characterised in that：
The temperature sensor uses temperature sensors of high precision, and measurement accuracy is 0.1 DEG C~3 DEG C.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109539458A (en) * | 2018-10-29 | 2019-03-29 | 珠海格力电器股份有限公司 | A kind of lack of fluorine of air-conditioners detection method, detection device and air-conditioning |
| CN109764490A (en) * | 2019-01-21 | 2019-05-17 | 宁波奥克斯电气股份有限公司 | Air conditioner coolant supply state detection method, device and air-conditioning and storage medium |
| CN110068103A (en) * | 2019-04-29 | 2019-07-30 | 宁波奥克斯电气股份有限公司 | Coolant quantity judgment method and control method |
| CN110195910A (en) * | 2019-05-31 | 2019-09-03 | 四川长虹电器股份有限公司 | Refrigerating system coolant stock detection method |
| EP3553424A1 (en) * | 2018-04-13 | 2019-10-16 | Carrier Corporation | Detection apparatus and method for refrigerant leakage of air source cooling only system |
| EP3553423A1 (en) * | 2018-04-13 | 2019-10-16 | Carrier Corporation | Detection apparatus and method for detecting refrigerant leakage of air source heat pump system |
| CN110715396A (en) * | 2019-10-17 | 2020-01-21 | 广东美的制冷设备有限公司 | Refrigerant leakage detection method and device, air conditioner and electronic equipment |
| CN110887167A (en) * | 2018-09-10 | 2020-03-17 | 奥克斯空调股份有限公司 | Air conditioner refrigerant leakage detection method and air conditioner |
| CN111795468A (en) * | 2020-07-14 | 2020-10-20 | 南京天加环境科技有限公司 | Refrigeration control method for indoor unit electronic expansion valve |
| CN114543259A (en) * | 2022-03-08 | 2022-05-27 | 青岛海信日立空调系统有限公司 | Air conditioner |
| WO2024060784A1 (en) * | 2022-09-22 | 2024-03-28 | 青岛海尔空调器有限总公司 | Refrigerant detection method and apparatus, electronic device, and storage medium |
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| EP3553423A1 (en) * | 2018-04-13 | 2019-10-16 | Carrier Corporation | Detection apparatus and method for detecting refrigerant leakage of air source heat pump system |
| US11732939B2 (en) | 2018-04-13 | 2023-08-22 | Carrier Corporation | Detection apparatus and method for refrigerant leakage of air source heat pump system |
| CN110375467B (en) * | 2018-04-13 | 2022-07-05 | 开利公司 | Device and method for detecting refrigerant leakage of air source single refrigeration system |
| CN110375467A (en) * | 2018-04-13 | 2019-10-25 | 开利公司 | The detection device and method of leakage of refrigerant for air-source list refrigeration system |
| EP3553424A1 (en) * | 2018-04-13 | 2019-10-16 | Carrier Corporation | Detection apparatus and method for refrigerant leakage of air source cooling only system |
| CN110887167A (en) * | 2018-09-10 | 2020-03-17 | 奥克斯空调股份有限公司 | Air conditioner refrigerant leakage detection method and air conditioner |
| CN109539458A (en) * | 2018-10-29 | 2019-03-29 | 珠海格力电器股份有限公司 | A kind of lack of fluorine of air-conditioners detection method, detection device and air-conditioning |
| CN109764490A (en) * | 2019-01-21 | 2019-05-17 | 宁波奥克斯电气股份有限公司 | Air conditioner coolant supply state detection method, device and air-conditioning and storage medium |
| CN110068103A (en) * | 2019-04-29 | 2019-07-30 | 宁波奥克斯电气股份有限公司 | Coolant quantity judgment method and control method |
| CN110195910A (en) * | 2019-05-31 | 2019-09-03 | 四川长虹电器股份有限公司 | Refrigerating system coolant stock detection method |
| CN110715396A (en) * | 2019-10-17 | 2020-01-21 | 广东美的制冷设备有限公司 | Refrigerant leakage detection method and device, air conditioner and electronic equipment |
| CN110715396B (en) * | 2019-10-17 | 2021-11-19 | 广东美的制冷设备有限公司 | Refrigerant leakage detection method and device, air conditioner and electronic equipment |
| CN111795468A (en) * | 2020-07-14 | 2020-10-20 | 南京天加环境科技有限公司 | Refrigeration control method for indoor unit electronic expansion valve |
| CN111795468B (en) * | 2020-07-14 | 2021-06-08 | 南京天加环境科技有限公司 | Refrigeration control method for indoor unit electronic expansion valve |
| CN114543259A (en) * | 2022-03-08 | 2022-05-27 | 青岛海信日立空调系统有限公司 | Air conditioner |
| CN114543259B (en) * | 2022-03-08 | 2023-10-17 | 青岛海信日立空调系统有限公司 | Air conditioner |
| WO2024060784A1 (en) * | 2022-09-22 | 2024-03-28 | 青岛海尔空调器有限总公司 | Refrigerant detection method and apparatus, electronic device, and storage medium |
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| CN107289599B (en) | 2020-03-17 |
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