CN110966719B - Refrigerant quantity detection method of air conditioner and computer readable storage medium - Google Patents
Refrigerant quantity detection method of air conditioner and computer readable storage medium Download PDFInfo
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- CN110966719B CN110966719B CN201911131478.7A CN201911131478A CN110966719B CN 110966719 B CN110966719 B CN 110966719B CN 201911131478 A CN201911131478 A CN 201911131478A CN 110966719 B CN110966719 B CN 110966719B
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 100
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000004378 air conditioning Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 22
- 238000004590 computer program Methods 0.000 claims description 12
- 230000007812 deficiency Effects 0.000 claims description 5
- 125000000962 organic group Chemical group 0.000 claims description 4
- 238000010977 unit operation Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000002950 deficient Effects 0.000 claims 2
- 238000012423 maintenance Methods 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F25B45/00—Arrangements for charging or discharging refrigerant
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner, a refrigerant quantity detection method of the air conditioner and a computer readable storage medium, wherein the air conditioner comprises an air conditioner external unit, a weight measuring device for detecting the weight of the air conditioner external unit is fixed on a base pin at the lower end of the air conditioner external unit, and the weight measuring device is arranged at the lower end of the air conditioner external unit, so that the total mass change of the air conditioner external unit can be effectively detected to judge whether the refrigerant quantity in an air conditioning system has deviation or not, the refrigerant in the air conditioning system does not need to be emptied, the refrigerant is directly replenished according to the refrigerant missing amount, the residual refrigerant is prevented from being discharged into the air, the pollution and the potential safety hazard are avoided, and.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to an air conditioner, a method for detecting a refrigerant amount of the air conditioner, and a computer-readable storage medium.
Background
The existing air-conditioning system requires accurate amount of refrigerant to be filled, and the performance and the use effect of the air conditioner can be influenced by too much or too little amount of refrigerant, and parts of the air-conditioning system can be damaged in severe cases. When the air conditioner leaks the refrigerant condition after sale maintenance, especially commercial unit, the refrigerant perfusion volume is usually more, generally must be according to the handling of recharging of the perfusion volume of unit data plate mark, need to put down original whole refrigerant to have very big pollution to the environment in the air on the one hand, and some refrigerants are poisonous or flammable on the one hand, have very big potential safety hazard, and the refrigerant price is higher moreover, and the vain is put down and is leaded to after sale maintenance cost too high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the air conditioner which can effectively detect the total mass change of an air conditioner external unit to judge whether the refrigerant quantity in the air conditioning system has deviation or not, does not need to evacuate the refrigerant in the air conditioning system, directly supplements the refrigerant according to the refrigerant missing quantity, avoids the residual refrigerant from being discharged into the air, avoids causing pollution and potential safety hazard, and reduces the maintenance cost.
The embodiment of the invention provides an air conditioner, which comprises an air conditioner outdoor unit, wherein a weight measuring device for detecting the weight of the air conditioner outdoor unit is fixed on a base pin at the lower end of the air conditioner outdoor unit.
Furthermore, the weight measuring device comprises a strain gauge, a controller and a display panel, the strain gauge is fixed at the lower end of the air conditioner outdoor unit, the controller is electrically connected to one end of the strain gauge and used for converting resistance change on the strain gauge into weight change, and the display panel is electrically connected to one end of the controller and used for displaying the weight of the air conditioner outdoor unit.
The embodiment also provides a method for detecting the amount of refrigerant of the air conditioner, the method includes the steps of obtaining an initial weight of an air conditioner external unit before the air conditioner system is started, obtaining an operation weight of the air conditioner external unit after the air conditioner system operates for a period of time, calculating and recording weight difference values of the real-time weight and the initial weight and the operation weight respectively by detecting the real-time weight of the air conditioner external unit in the subsequent operation process of the air conditioner system, and judging the loss of the amount of refrigerant corresponding to the air conditioner according to the weight difference values.
Further, acquiring the initial weight of the air conditioner external unit before starting the air conditioning system specifically comprises: all the refrigerants are in the air conditioner external unit, and the initial weight of the air conditioner external unit at the moment is Mo through the weight measuring device.
Further, the operation weight of the air conditioner external unit obtained after the air conditioning system operates for a period of time is specifically as follows: and starting the air conditioning system, then discharging the refrigerant by the outdoor unit, normally operating for a period of time, and then stopping the air conditioning system, wherein the refrigerant exists in the whole air conditioning system at the same time, and the operating weight of the outdoor unit of the air conditioner is M1 at the moment through the weight measuring device.
Further, the calculating and recording the difference between the real-time weight and the initial weight and the running weight respectively specifically comprises: and detecting the real-time weight of the air conditioner external unit in the subsequent operation of the air conditioning system through a detection mode, wherein the detection mode comprises organic group operation detection and manual detection, the difference value between the real-time weight and the operation weight of the air conditioner external unit is detected under the condition of the organic group operation detection, and the difference value between the real-time weight and the initial weight of the air conditioner external unit is detected under the condition of the manual detection.
Further, when the detection mode is unit operation detection, the judgment of the lack of the corresponding air conditioner refrigerant quantity through the weight difference is specifically that if the weight difference M1-M meets M1-M being not more than Δ n, the unit refrigerant quantity is normal at the moment, the unit continues to operate, and if the weight difference M1-M meets M1-M being greater than Δ n, the unit refrigerant quantity is missing at the moment, wherein M1 is the operation weight of an air conditioner outdoor unit, M is the real-time weight of the air conditioner outdoor unit, and the weight of deviation of Δ n is allowed.
Further, when the detection mode is manual detection, the judgment of the absence of the corresponding air conditioner refrigerant quantity through the weight difference is specifically that if the weight difference M0-M meets M0-M and is not more than Δ M, the unit refrigerant quantity is normal at the moment, the unit continues to operate, if the weight difference M0-M meets M0-M & gt Δ M, the unit refrigerant quantity is absent at the moment, and refrigerants can be quantitatively added according to the refrigerant absence quantity, wherein M0 is the initial weight of an air conditioner outdoor unit, M is the real-time weight of the air conditioner outdoor unit, and Δ M is the weight of allowable deviation.
A computer-readable storage medium storing a computer program for performing any one of the above methods of detecting an amount of air conditioning refrigerant when the computer program is called by a processor.
The air conditioner, the refrigerant quantity detection method of the air conditioner and the computer readable storage medium have the advantages that: the weight measuring device is arranged, so that the total mass change of the air conditioner external unit can be effectively detected to judge whether the refrigerant quantity in the air conditioning system has deviation or not, the refrigerant in the air conditioning system does not need to be emptied, the refrigerant is directly supplemented according to the refrigerant missing amount, the residual refrigerant is prevented from being discharged into the air, the pollution and potential safety hazard are avoided, and the maintenance cost is reduced.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic view of an overall structure of an air conditioner according to the present invention.
FIG. 2 is a schematic flow chart of example 1 of the present invention.
FIG. 3 is a schematic flow chart of example 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1
As shown in fig. 1-2, the present embodiment provides an air conditioner, including an air conditioner external unit 1, a weight measuring device 2 for detecting the weight of the air conditioner external unit 1 is fixed to a base pin 11 at the lower end of the air conditioner external unit 1, and since the weight measuring device 2 is provided, the refrigerant quantity deviation of the air conditioner system can be effectively detected, the refrigerant in the air conditioner system does not need to be evacuated, the refrigerant is directly replenished according to the refrigerant deficiency, the residual refrigerant is prevented from being discharged into the air, the pollution and the potential safety hazard are avoided, and the maintenance cost is reduced.
In a preferred embodiment, the weight measuring device 2 includes a strain gauge 21, a controller 22 and a display panel 23, the strain gauge 21 is fixed at the lower end of the outdoor unit 1, the controller 22 is electrically connected to one end of the strain gauge 21 and is configured to convert a resistance change on the strain gauge 21 into a weight change, and the display panel 23 is electrically connected to one end of the controller 22 and is configured to display the weight of the outdoor unit 1, where two strain gauges 21 are respectively fixed at two ends of the outdoor unit 1, and the weight change of the outdoor unit 1 can be fed back after being processed by the controller 22 according to a resistance change of the two strain gauges 21 after being stressed, and the weight of the outdoor unit 1 is recorded in an air conditioning program and displayed by the display panel to help to calculate a refrigerant loss amount subsequently.
The embodiment also discloses a refrigerant quantity detection method of an air conditioner, which comprises the following steps:
the method comprises the following steps: firstly, recording the weight of an outdoor unit 1 of an air conditioner when the normal refrigerant filling amount is recorded during the installation of the air conditioner, and after the outdoor unit 1 of the air conditioner is placed on a bracket, before a copper pipe is connected between the outdoor unit 1 of the air conditioner and an indoor unit, firstly connecting an indoor unit communication line and the outdoor unit with electricity, so that the unit can normally detect the weight of the outdoor unit 1 of the air conditioner by electrifying; all the refrigerants are in the air conditioner external unit 1 at this time, and the air conditioner program records that the weight of the air conditioner external unit 1 is Mo at this time.
Step two: the air conditioning system is started, so that the air conditioner outdoor unit 1 releases the refrigerant, the air conditioner outdoor unit is stopped after normally running for a period of time, the refrigerant exists in the whole air conditioning system (including the air conditioner outdoor unit 1, the refrigerant pipe and the indoor unit) at the same time, and the running weight of the air conditioner outdoor unit 1 is M1 at the moment through the weight measuring device 2.
Step three: the method comprises the steps of adopting unit operation detection, setting the weight allowable deviation of the air conditioner external unit 1 to be delta n (delta n is more available in specific air conditioner models), detecting the weight of the air conditioner external unit to be M when the unit automatically operates and detecting the unit operation that the weight of the air conditioner external unit is M when the air conditioner stops every time, if the weight difference M1-M meets M1-M is less than or equal to delta n, the refrigerant quantity of the unit is normal at the moment, the unit continuously operates, and if the weight difference M1-M meets M1-M > delta n, the refrigerant quantity of the unit is lost at the moment, wherein M1 is the operation weight of the air conditioner external unit 1, M is the real-time weight of the air conditioner external unit 1.
In a preferred embodiment, the air conditioner further includes a processor and a memory, where the memory is used to store a computer program, and the computer program realizes the method for detecting the amount of refrigerant in the air conditioner of embodiment 1 when the computer program is called by the processor.
Example 2
As shown in fig. 1 and 3, the embodiment provides an air conditioner, which includes an air conditioner external unit 1, a weight measuring device 2 for detecting the weight of the air conditioner external unit 1 is fixed on a footing 11 at the lower end of the air conditioner external unit 1, and the weight measuring device 2 is arranged, so that the refrigerant quantity deviation of an air conditioning system can be effectively detected, refrigerants in the air conditioning system do not need to be emptied, the refrigerant quantity deviation can be directly supplemented according to the refrigerant deficiency, the residual refrigerants are prevented from being discharged into the air, pollution and potential safety hazards are avoided, and the maintenance cost is reduced.
In a preferred embodiment, the weight measuring device 2 includes a strain gauge 21, a controller 22 and a display panel 23, the strain gauge 21 is fixed at the lower end of the outdoor unit 1, the controller 22 is electrically connected to one end of the strain gauge 21 and is configured to convert a resistance change on the strain gauge 21 into a weight change, and the display panel 23 is electrically connected to one end of the controller 22 and is configured to display the weight of the outdoor unit 1, where two strain gauges 21 are respectively fixed at two ends of the outdoor unit 1, and the weight change of the outdoor unit 1 can be fed back after being processed by the controller 22 according to a resistance change of the two strain gauges 21 after being stressed, and the weight of the outdoor unit 1 is recorded in an air conditioning program and displayed by the display panel to help to calculate a refrigerant loss amount subsequently.
The embodiment also discloses a refrigerant quantity detection method of an air conditioner, which comprises the following steps:
the method comprises the following steps: firstly, recording the weight of an outdoor unit 1 of an air conditioner when the normal refrigerant filling amount is recorded during the installation of the air conditioner, and after the outdoor unit 1 of the air conditioner is placed on a bracket, before a copper pipe is connected between the outdoor unit 1 of the air conditioner and an indoor unit, firstly connecting an indoor unit communication line and the outdoor unit with electricity, so that the unit can normally detect the weight of the outdoor unit 1 of the air conditioner by electrifying; all the refrigerants are in the air conditioner external unit 1 at this time, and the air conditioner program records that the weight of the air conditioner external unit 1 is Mo at this time.
Step two: the air conditioning system is started, so that the air conditioner outdoor unit 1 releases the refrigerant, the air conditioner outdoor unit is stopped after normally running for a period of time, the refrigerant exists in the whole air conditioning system (including the air conditioner outdoor unit 1, the refrigerant pipe and the indoor unit) at the same time, and the running weight of the air conditioner outdoor unit 1 is M1 at the moment through the weight measuring device 2.
Step three: the method comprises the steps of setting the weight allowable deviation of an air conditioner external unit 1 to be delta M (the delta M is more specific air conditioner models can be obtained) by adopting manual detection, recovering refrigerants of the air conditioner system when the refrigerant quantity of the air conditioner system is insufficient, detecting the weight of the air conditioner external unit 1 at the moment after all the refrigerants are recovered in the air conditioner external unit 1, detecting the weight of the external unit to be M, if the weight difference M0-M meets the condition that the M0-M is less than or equal to the delta M, the refrigerant quantity of the unit is normal at the moment, the unit continues to operate, if the weight difference M0-M meets the condition that the M0-M is greater than the delta M, the refrigerant quantity of the unit is lost at the moment, and quantitatively adding the refrigerants according to the refrigerant loss quantity, wherein M0 is the initial weight of the air conditioner external unit 1, M is the real-time weight of.
In a preferred embodiment, the air conditioner further includes a processor and a memory, where the memory is used to store a computer program, and the computer program realizes the method for detecting the amount of refrigerant in the air conditioner of embodiment 1 when the computer program is called by the processor.
Example 3
A computer-readable storage medium storing a computer program that implements the method for detecting the amount of air-conditioning refrigerant described in embodiments 1 and 2 when the computer program is called by a processor.
The air conditioner, the refrigerant quantity detection method of the air conditioner and the computer readable storage medium have the advantages that: the weight measuring device is arranged, so that the refrigerant quantity deviation of the air-conditioning system can be effectively detected, refrigerants in the air-conditioning system do not need to be emptied, the refrigerants are directly replenished according to the refrigerant missing amount, the residual refrigerants are prevented from being discharged into the air, pollution and potential safety hazards are avoided, and the maintenance cost is reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The method for detecting the amount of the refrigerant of the air conditioner comprises the air conditioner, wherein the air conditioner comprises an air conditioner external unit, and the method is characterized in that: a weight measuring device for detecting the weight of the air conditioner outdoor unit is fixed on a base pin at the lower end of the air conditioner outdoor unit; the weight measuring device comprises a strain gauge, a controller and a display panel, the strain gauge is fixed at the lower end of the air conditioner outdoor unit, the controller is electrically connected to one end of the strain gauge and used for converting resistance change on the strain gauge into weight change, and the display panel is electrically connected to one end of the controller and used for displaying the weight of the air conditioner outdoor unit; the method comprises the steps that an initial weight of an air conditioner external unit is obtained before the air conditioner system is started, the running weight of the air conditioner external unit is obtained after the air conditioner system runs for a period of time, in the running process of a subsequent air conditioner system, the real-time weight of the air conditioner external unit is detected, the weight difference value between the real-time weight and the initial weight and the running weight is calculated and recorded, and the loss of the corresponding air conditioner refrigerant quantity is judged through the weight difference value; the calculating and recording the difference value between the real-time weight and the initial weight and the running weight respectively is specifically as follows: detecting the real-time weight of an air conditioner external unit in the subsequent operation of an air conditioning system through a detection mode, wherein the detection mode comprises organic group operation detection and manual detection, the difference value between the real-time weight and the operation weight of the air conditioner external unit is detected under the condition of the organic group operation detection, and the difference value between the real-time weight and the initial weight of the air conditioner external unit is detected under the condition of the manual detection; when the detection mode is unit operation detection, the deficiency of the corresponding air conditioner refrigerant quantity is judged according to the weight difference, specifically, if the weight difference M1-M meets M1-M being not more than delta n, the unit refrigerant quantity is normal at the moment, the unit continues to operate, and if the weight difference M1-M meets M1-M being greater than delta n, the unit refrigerant quantity is deficient at the moment, wherein M1 is the operation weight of an air conditioner outdoor unit, M is the real-time weight of the air conditioner outdoor unit, and delta n is the allowable deviation weight. .
2. The method for detecting the amount of refrigerant in an air conditioner as claimed in claim 1, wherein: the method for acquiring the initial weight of the air conditioner external unit before the air conditioning system is started comprises the following steps: all the refrigerants are in the air conditioner external unit, and the initial weight of the air conditioner external unit at the moment is Mo through the weight measuring device.
3. The method for detecting the amount of refrigerant in an air conditioner as claimed in claim 1, wherein: the method for acquiring the running weight of the air conditioner external unit after the air conditioning system runs for a period of time specifically comprises the following steps: and starting the air conditioning system, then discharging the refrigerant by the outdoor unit, normally operating for a period of time, and then stopping the air conditioning system, wherein the refrigerant exists in the whole air conditioning system at the same time, and the operating weight of the outdoor unit of the air conditioner is M1 at the moment through the weight measuring device.
4. The method for detecting the amount of refrigerant in an air conditioner as claimed in claim 1, wherein: when the detection mode is manual detection, the deficiency of the corresponding air conditioner refrigerant quantity is judged by the weight difference, specifically, if the weight difference M0-M meets M0-M and is less than or equal to Δ M, the refrigerant quantity of the unit is normal at the moment, the unit continues to operate, if the weight difference M0-M meets M0-M & gt Δ M, the refrigerant quantity of the unit is deficient at the moment, and the refrigerant can be quantitatively added according to the refrigerant deficiency, wherein M0 is the initial weight of an air conditioner outdoor unit, M is the real-time weight of the air conditioner outdoor unit, and Δ M is the weight of allowable deviation.
5. A computer-readable storage medium storing a computer program, characterized in that: the computer program is used for realizing the method for detecting the air conditioner refrigerant quantity according to any one of claims 1 to 4 when being called by a processor.
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| CN201911131478.7A CN110966719B (en) | 2019-11-19 | 2019-11-19 | Refrigerant quantity detection method of air conditioner and computer readable storage medium |
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| CN201911131478.7A CN110966719B (en) | 2019-11-19 | 2019-11-19 | Refrigerant quantity detection method of air conditioner and computer readable storage medium |
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| CN115076865A (en) * | 2022-05-17 | 2022-09-20 | 青岛海尔空调器有限总公司 | Refrigerant filling method, electronic equipment, readable storage medium and air conditioner thereof |
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| JP4271459B2 (en) * | 2002-05-15 | 2009-06-03 | サンデン株式会社 | Air conditioner |
| JP5035022B2 (en) * | 2008-02-29 | 2012-09-26 | ダイキン工業株式会社 | Air conditioner and refrigerant quantity determination method |
| KR20150137878A (en) * | 2014-05-30 | 2015-12-09 | 엘지전자 주식회사 | Refrigerant charging kit, air conditioner, and controlling method for charging of refrigerant |
| CN105372084B (en) * | 2015-10-26 | 2018-05-01 | 广东美的暖通设备有限公司 | A kind of heat pump performance detection method and Standard Machine weighing method |
| CN105277261A (en) * | 2015-11-19 | 2016-01-27 | 南京信息工程大学 | High-precision automatic refrigerant weighing system and control method thereof |
| CN107356030A (en) * | 2017-08-28 | 2017-11-17 | 珠海格力电器股份有限公司 | Automatic refrigerant filling device and method |
| CN108692790A (en) * | 2018-05-23 | 2018-10-23 | 夏文才 | A kind of new-energy automotive air-conditioning refrigerant detection device |
| CN108800430B (en) * | 2018-07-02 | 2020-07-24 | 珠海格力电器股份有限公司 | Air conditioning system, and method and device for measuring weight of refrigerant of air conditioning system |
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