CN111336728A - Refrigerant transmission method and device and refrigerant treatment equipment - Google Patents
Refrigerant transmission method and device and refrigerant treatment equipment Download PDFInfo
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- CN111336728A CN111336728A CN202010182796.2A CN202010182796A CN111336728A CN 111336728 A CN111336728 A CN 111336728A CN 202010182796 A CN202010182796 A CN 202010182796A CN 111336728 A CN111336728 A CN 111336728A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 328
- 238000000034 method Methods 0.000 title claims abstract description 67
- 230000005540 biological transmission Effects 0.000 title claims abstract description 59
- 238000012545 processing Methods 0.000 claims abstract description 83
- 230000000694 effects Effects 0.000 claims abstract description 53
- 238000005057 refrigeration Methods 0.000 claims abstract description 47
- 230000008859 change Effects 0.000 claims abstract description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 24
- 238000001704 evaporation Methods 0.000 claims description 21
- 230000008020 evaporation Effects 0.000 claims description 21
- 238000004364 calculation method Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 239000002274 desiccant Substances 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000002716 delivery method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005429 filling process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F25B45/00—Arrangements for charging or discharging refrigerant
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/003—Control issues for charging or collecting refrigerant to or from a cycle
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The embodiment of the invention relates to the technical field of automobile intelligent control, and discloses a refrigerant transmission method which is applied to refrigerant treatment equipment, the method first controls the refrigerant to be transmitted between the vehicle air conditioner and the refrigerant processing equipment through the first pipeline, measures the weight change of the refrigerant in the refrigerant processing equipment, switching the refrigerant to the second pipeline for transmission when the weight change of the refrigerant reaches a first threshold value, and then obtaining the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner, and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
Description
Technical Field
The invention relates to the technical field of automobile intelligent control, in particular to a refrigerant transmission method, a refrigerant transmission device and refrigerant treatment equipment.
Background
The refrigerant, also called refrigerant, is generally applied to air conditioning systems, such as automobile air conditioners, because of its characteristics of being easy to absorb heat and change into gas and easy to release heat and change into liquid, before maintenance of the automobile air conditioners, the refrigerant in the air conditioners generally needs to be recovered by using refrigerant recovery equipment to prevent the refrigerant from leaking and causing environmental pollution, and after the maintenance is completed, the refrigerant filling equipment is used to fill the refrigerant into the automobile air conditioners to enable the automobile air conditioners to realize refrigeration.
In implementing the present invention, the inventors found that at least the following problems exist in the above related art: the storage tank for storing the refrigerant is heavy, usually in the order of kilograms, and the transmission precision of the refrigerant is in the order of tens of grams, and the existing refrigerant processing equipment can not ensure the high precision in the range, and simultaneously improve the transmission efficiency of the refrigerant.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, an object of the present invention is to provide a refrigerant conveying method, a refrigerant conveying device and a refrigerant processing apparatus with good conveying precision and high conveying efficiency.
The purpose of the invention is realized by the following technical scheme:
in order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a refrigerant transmission method applied to a refrigerant processing device, where the refrigerant processing device is respectively connected to an automotive air conditioner through a first pipeline and a second pipeline, and a pipe diameter of the first pipeline is greater than a pipe diameter of the second pipeline, the method including:
controlling refrigerant to be transferred between the vehicle air conditioner and the refrigerant processing device through the first pipeline, and measuring weight change of the refrigerant in the refrigerant processing device;
when the weight change of the refrigerant reaches a first threshold value, switching the refrigerant to the second pipeline for transmission;
acquiring the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner;
and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
In some embodiments, the first threshold is determined based on a total weight of refrigerant contained by the vehicle air conditioner.
In some embodiments, the step of obtaining the ambient heat temperature in the vehicle air conditioner further comprises:
detecting a first pressure of a low pressure line of the refrigerant treatment device;
determining an evaporation temperature of the refrigerant at the first pressure based on the first pressure;
detecting the gas temperature of gas formed after the refrigerant in the automobile air conditioner is evaporated by the evaporator;
and calculating the ambient heat temperature in the automobile air conditioner according to the evaporation temperature and the gas temperature.
In some embodiments, the calculation formula for calculating the ambient heat temperature in the vehicle air conditioner is as follows:
SH＝Tsat-Tboing
where SH represents the ambient heat temperature, Tsat represents the gas temperature, and tboring represents the evaporation temperature.
In some embodiments, the step of obtaining the ambient heat temperature in the vehicle air conditioner further comprises:
detecting a second pressure of a high pressure line of the refrigerant processing device;
determining a condensing temperature of the refrigerant at the second pressure based on the second pressure;
detecting the liquid temperature of liquid formed after a refrigerant in the automobile air conditioner is condensed by a condenser;
and calculating the ambient heat temperature in the automobile air conditioner according to the condensation temperature and the liquid temperature.
In some embodiments, the calculation formula for calculating the ambient heat temperature in the vehicle air conditioner is as follows:
SC＝Tliq-Tcooling
where SC represents the ambient heat temperature, Tliq represents the liquid temperature, and Tcooling represents the condensing temperature.
In some embodiments, the refrigerant treatment device further comprises: a first temperature and humidity sensor used for being arranged at a copper disc air inlet arranged inside the evaporator, a second temperature and humidity sensor used for being arranged at a copper disc air inlet arranged outside the evaporator,
the step of obtaining the refrigeration effect temperature in the automobile air conditioner further includes:
acquiring the indoor wet bulb temperature of the automobile air conditioner through the first temperature and humidity sensor;
acquiring the outdoor dry bulb temperature of the automobile air conditioner through the second temperature and humidity sensor;
and calculating the refrigeration effect temperature of the refrigerant in the automobile air conditioner according to the indoor wet bulb temperature and the outdoor dry bulb temperature.
In some embodiments, the calculation formula for calculating the cooling effect temperature in the vehicle air conditioner is as follows:
wherein, TSH represents the refrigeration effect temperature, IDWB represents the indoor wet bulb temperature, and ODDB represents the outdoor dry bulb temperature.
In some embodiments, the step of controlling the transfer amount of the refrigerant between the vehicle air conditioner and the refrigerant processing device according to the comparison result between the ambient heat temperature and the cooling effect temperature further includes:
and controlling the transmission quantity of the refrigerant for multiple times according to the difference value between the environment heat temperature and the refrigeration effect temperature until the difference value between the environment heat temperature and the refrigeration effect temperature is within a preset range.
In some embodiments, the amount of transmission is proportional to the difference.
In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides a refrigerant conveying device applied to a refrigerant processing device, where the refrigerant processing device is respectively connected to an automotive air conditioner through a first pipeline and a second pipeline, and a pipe diameter of the first pipeline is greater than a pipe diameter of the second pipeline, the device including:
the first control module is used for controlling refrigerant to be transmitted between the automobile air conditioner and the refrigerant processing equipment through the first pipeline and measuring weight change of the refrigerant in the refrigerant processing equipment;
the switching module is used for switching the refrigerant to the second pipeline for transmission when the weight change of the refrigerant reaches a first threshold value;
the acquisition module is used for acquiring the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner;
and the second control module is used for controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
In order to solve the above technical problem, in a third aspect, an embodiment of the present invention provides a refrigerant treatment apparatus, including:
one end of the low-pressure pipeline is used for being connected with a low-pressure pipe service port of the automobile air conditioner;
one end of the high-pressure pipeline is used for being connected with a high-pressure pipe service port of the automobile air conditioner;
a storage tank for storing a refrigerant;
the electronic scale is used for weighing the weight of the storage tank;
a first pipeline, one end of which is connected with the storage tank and the other end of which is connected with the other end of the low-pressure pipeline or the other end of the high-pressure pipeline;
one end of the second pipeline is connected with the storage tank, the other end of the second pipeline is connected with the other end of the low-pressure pipeline or the other end of the high-pressure pipeline, and the pipe diameter of the first pipeline is larger than that of the second pipeline;
the first electromagnetic valve is used for controlling the on-off of the first pipeline;
the second electromagnetic valve is used for controlling the on-off of the second pipeline;
the first air pressure sensor is arranged at one end of the low-pressure pipeline close to the first electromagnetic valve and the second electromagnetic valve;
the second air pressure sensor is arranged at one end of the high-pressure pipeline close to the first electromagnetic valve and the second electromagnetic valve;
the first temperature sensor is used for being installed between an evaporator and a compressor of the automobile air conditioner and is close to the low-pressure pipe service port;
the second temperature sensor is used for being arranged between a compressor and a drying agent of the automobile air conditioner and is close to the high-pressure pipe service port;
the first temperature and humidity sensor is used for being installed at a copper disc air inlet inside the evaporator;
the second temperature and humidity sensor is used for being installed at a copper disc air inlet outside the evaporator;
at least one processor connected to the electronic scale, the first solenoid valve, the second solenoid valve, the first barometric pressure sensor, the second barometric pressure sensor, the first temperature sensor, the second temperature sensor, the first temperature and humidity sensor, and the second temperature and humidity sensor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect as described above.
In order to solve the above technical problem, in a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method according to the first aspect.
In order to solve the above technical problem, in a fifth aspect, the present invention further provides a computer program product, which includes a computer program stored on a computer-readable storage medium, the computer program including program instructions, which, when executed by a computer, cause the computer to execute the method according to the first aspect.
Compared with the prior art, the invention has the beneficial effects that: in contrast to the prior art, embodiments of the present invention provide a refrigerant transfer method, applied to a refrigerant processing device, the method first controls the refrigerant to be transmitted between the vehicle air conditioner and the refrigerant processing equipment through the first pipeline, measures the weight change of the refrigerant in the refrigerant processing equipment, switching the refrigerant to the second pipeline for transmission when the weight change of the refrigerant reaches a first threshold value, and then obtaining the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner, and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic diagram of an application scenario of a refrigerant transfer method provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of another application scenario of the refrigerant transmission method provided by the embodiment of the invention;
FIG. 3 is a flow chart of a method of refrigerant delivery according to an embodiment of the present invention;
FIG. 4 is a sub-flowchart of step 120 of the method of FIG. 3;
FIG. 5 is another sub-flow diagram of step 120 of the method of FIG. 3;
FIG. 6 is a sub-flowchart of step 130 of the method of FIG. 3;
fig. 7 is a schematic structural diagram of a refrigerant transfer device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a hardware structure of a refrigerant processing apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that, if not conflicted, the various features of the embodiments of the invention may be combined with each other within the scope of protection of the present application. Additionally, while functional block divisions are performed in apparatus schematics, with logical sequences shown in flowcharts, in some cases, steps shown or described may be performed in sequences other than block divisions in apparatus or flowcharts. Further, the terms "first," "second," "third," and the like, as used herein, do not limit the data and the execution order, but merely distinguish the same items or similar items having substantially the same functions and actions.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
According to SAE specification requirements, the filling accuracy of the refrigerant of the automobile air conditioner needs to be within +/-15 grams, the refrigerant is stored in a storage tank of the refrigerant treatment equipment before the refrigerant is filled, the total weight is dozens of kilograms, the weighing accuracy of the few grams is difficult to control in the range of the amount of the current sensor technology, and part of the refrigerant is remained on a pipeline used for conveying the refrigerant between the refrigerant treatment equipment and the automobile air conditioner and the filling accuracy is also influenced.
In order to solve the problems of poor filling accuracy and low transmission efficiency of the existing refrigerant processing equipment, an embodiment of the present invention provides a refrigerant transmission method, which is applied to the refrigerant processing equipment, the refrigerant processing equipment is connected with an automotive air conditioner, please refer to fig. 1, which shows a schematic diagram of one application environment of the refrigerant transmission method provided by the embodiment of the present invention, and the application environment includes: the refrigerant treatment device 10 and the automobile air conditioner 20 are connected, and the refrigerant treatment device 10 and the automobile air conditioner 20 are connected through a low-pressure pipeline 11 a. The application scenario shown in fig. 1 is applied to the case where the refrigerant processing device 10 fills the vehicle air conditioner 20 with the refrigerant.
The refrigerant processing device 10 is a device, apparatus or machine capable of charging a vehicle air conditioner 20 with refrigerant. The refrigerant processing device 10 further includes a storage tank 12, an electronic scale 13, a first solenoid valve 14, and a second solenoid valve 15. The storage tank 12 is used for storing the refrigerant, and the electronic scale 13 is used for weighing the storage tank 12 to determine the residual amount of the refrigerant in the storage tank 12. Alternatively, the electronic scale 13 may be replaced with a measuring instrument or device such as a liquid meter for detecting a mass or a change in the mass.
The refrigerant processing equipment 10 is further provided with a first pipeline 16 and a second pipeline 17, one end of each of the first pipeline 16 and the second pipeline 17 is connected with the storage tank 12, the other end of each of the first pipeline 16 and the second pipeline 17 is connected with the low-pressure pipe 11a, and only the first pipeline 16 or the second pipeline 17 is communicated with the low-pressure pipe 11a during operation.
The first electromagnetic valve 14 is used for controlling the on-off of the first pipeline 16, and when the first electromagnetic valve 14 is opened, the refrigerant processing device 10 fills the refrigerant into the vehicle air conditioner 20 through the first pipeline 16; the second electromagnetic valve 15 is used for controlling on-off of the second pipeline 17, and when the second electromagnetic valve 15 is opened, the refrigerant processing device 10 fills the refrigerant into the vehicle air conditioner 20 through the second pipeline 17. The filling efficiency of the first line 16 is higher than the filling efficiency of the second line 17, for example, the radius of the first line 16 is larger than the radius of the second line 17. The first line 16 is intended to be opened when the vehicle air conditioner 20 requires a large filling of refrigerant, and at the same time the second line 17 needs to be closed. The second line 17 is used to open when the vehicle air conditioner 20 needs to control the filling amount of the refrigerant with high accuracy, and at the same time the first line 16 needs to be closed.
The refrigerant treatment device 10 further includes a first air pressure sensor P1, the first air pressure sensor P1 being disposed at one end of the low pressure line 11a near the first solenoid valve 14 and the second solenoid valve 15, for detecting the air pressure level of the refrigerant output from the tank 12 in the low pressure line 11 a. Preferably, the first pressure sensor P1 is disposed in the low pressure pipeline 11a to obtain more accurate pressure data.
In the embodiment of the present invention, the refrigerant treatment device 10 can also be used to recover refrigerant in the vehicle air conditioner 20. Specifically, referring to fig. 2 together, an application scenario of the refrigerant processing device 10 for recovering the refrigerant in the vehicle air conditioner 20 is shown, which is different from the application scenario shown in fig. 1, in that when the refrigerant processing device 10 is connected to the high-pressure pipe service port 22 of the vehicle air conditioner 20 through the high-pressure pipe 11b, the refrigerant processing device 10 recovers the refrigerant from the vehicle air conditioner 20. The high-pressure line 11b and the low-pressure line 11a may be the same line, or may be two lines provided separately and independently. When the high pressure line 11b is not the same as the low pressure line 11a, the high pressure line 11b should be the same as the low pressure line 11a, and a recovery line, an electromagnetic valve, and a second pressure sensor P2 corresponding to the first line 16 and the second line 17 are provided for controlling and monitoring the efficiency of recovering the refrigerant.
The vehicle air conditioner 20 includes, in addition to the low-pressure pipe service port 21 and the high-pressure pipe service port 22 described above: evaporator 23, condenser 24, expansion valve 25, compressor 26 and desiccant 27. The evaporator 23 is used for exchanging heat between liquid refrigerant and air inside the automobile to vaporize the refrigerant, so as to achieve the purpose of refrigerating the inside of the automobile; the condenser 24 is configured to heat-exchange a gaseous refrigerant with air outside the vehicle to liquefy the refrigerant, so that the liquefied refrigerant can be circulated and used in the vehicle air conditioner 20. The expansion valve 25 is installed between the evaporator 23 and the condenser 24 and adjacent to the evaporator 23, and serves to adjust the flow rate of the refrigerant into the evaporator 23 so that the refrigerant can be sufficiently vaporized in the evaporator 23. The compressor 26 is disposed between the condenser 24 and the expansion valve 25, and is configured to pressurize the refrigerant vaporized by the evaporator 23, so that the refrigerant can obtain power and circulate in the vehicle air conditioner 20. The low-pressure pipe service port 21 is provided on a pipe between the expansion valve 25 and the compressor 26, and is close to the expansion valve 25. The desiccant 27 serves to absorb moisture and impurities in the refrigerant. The high-pressure pipe service port 22 is provided on a pipe between the expansion valve 25 and the desiccant 27, and is close to the expansion valve 25. The evaporator 23 is internally provided with a copper plate formed by coiling a copper pipe, the copper plate is partially arranged inside the evaporator 23, and partially arranged outside the evaporator 23, and the copper plate arranged outside the evaporator 23 is used for carrying out heat exchange by contacting with air inside an automobile.
The refrigerant processing device 10 is further provided with a first temperature sensor T1, a second temperature sensor T2, a first temperature and humidity sensor IDWB and a second temperature and humidity sensor ODDB. The first temperature sensor T1 is installed between the evaporator 23 and the compressor 26 near the low pressure pipe service port 21, and is used for measuring the gas temperature of the refrigerant after passing through the evaporator 23. The first temperature and humidity sensor IDWB is installed on the copper plate inside the evaporator 23, is close to an air inlet of the copper plate, and is used for measuring the indoor wet bulb temperature of the automobile air conditioner 20. The second temperature and humidity sensor ODDB is installed on the copper plate outside the evaporator 23, and is close to the air inlet of the copper plate, and is used for measuring the outdoor dry bulb temperature of the vehicle air conditioner 20. Preferably, the second temperature and humidity sensor ODDB is installed at one foot of the copper disc air inlet, and is placed in the shade where the second temperature and humidity sensor ODDB needs to keep away from sunlight.
In some embodiments, when the refrigerant treatment device 10 is used for recovering refrigerant, the refrigerant treatment device 10 should be further provided with a second temperature sensor T2, and the second temperature sensor T2 should be provided between the expansion valve 25 and the desiccant 27 and near the high-pressure pipe service port 22 for measuring the condensation temperature of the refrigerant after being condensed by the condenser 24.
In the embodiment of the present invention, when the refrigerant processing device 10 fills the refrigerant, the first electromagnetic valve 14 is first opened, the refrigerant quickly fills the refrigerant into the vehicle air conditioner 20 through the first pipeline 16, when the filling amount is reached, the first electromagnetic valve 14 is closed and the second electromagnetic valve 15 is opened, and the refrigerant slowly fills the refrigerant through the second pipeline 17, so as to achieve high-precision filling. After the refrigerant is filled into the vehicle air conditioner 20 through the low-pressure pipe service port 21, the refrigerant passes through the compressor 26, the condenser 27, the desiccant 27, the expansion valve 25, the evaporator 23, and the expansion valve 25, and then passes through the compressor 26 again, thereby forming a refrigeration cycle.
In the embodiment of the present invention, when the refrigerant processing device 10 recovers the refrigerant, the high-pressure line 11b is connected to the high-pressure service port 22, the first electromagnetic valve 14 is opened, and the refrigerant is rapidly recovered from the vehicle air conditioner 20 through the first line 16, or the second electromagnetic valve 15 is opened, and the refrigerant is slowly recovered through the second line 17, so as to achieve the recovery of the refrigerant.
It should be noted that the refrigerant treatment device 10 may perform only one of the filling and the recovery. The refrigerant transmission method provided by the embodiment of the invention is generally performed by the refrigerant processing device 10 described above, and accordingly, the refrigerant transmission device is generally provided on the refrigerant processing device 10.
Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.
An embodiment of the present invention provides a refrigerant transmission method, which can be performed by the above-mentioned refrigerant processing device 10, where the refrigerant processing device is respectively connected to an automotive air conditioner through the above-mentioned first pipeline and second pipeline, and the pipe diameter of the first pipeline is larger than that of the second pipeline, please refer to fig. 3, which shows a flowchart of a refrigerant transmission method provided by an embodiment of the present invention, and the method includes, but is not limited to, the following steps:
step 110: controlling refrigerant to be transferred between the vehicle air conditioner and the refrigerant processing device through the first line, and measuring a weight change of the refrigerant in the refrigerant processing device.
In the embodiment of the present invention, first, the refrigerant treatment device 10 may be activated by the first electromagnetic valve 14 as described above, so that the refrigerant treatment device 10 quickly fills the vehicle air conditioner with the refrigerant through the low pressure line 11a and the low pressure pipe service port 21, or quickly recovers the refrigerant from the vehicle air conditioner through the high pressure line 11b and the high pressure pipe service port 22. Further, the compressor 26 in the vehicle air conditioner is started, so that the refrigerant starts to circulate and refrigerate in the vehicle air conditioner, and the refrigerant can be uniformly filled into the vehicle air conditioner or can be fully recycled.
Meanwhile, the weight change of the refrigerant in the storage tank can be measured by a weight measuring instrument such as the electronic scale 13 as described above. Specifically, the value of the weight weighed by the electronic scale before and after the refrigerant is transferred is subtracted to obtain the value of the weight change.
Step 120: when the weight change of the refrigerant reaches a first threshold value, the refrigerant is switched to the second pipeline for transmission.
After the start of the cycle in the vehicle air conditioner for a certain time, the weight change of the refrigerant reaches a first threshold value, for example, when the refrigerant is filled, the refrigerant in the storage tank is lowered to the first threshold value, or when the refrigerant in the storage tank is raised to the first threshold value when the refrigerant is recovered, the first solenoid valve 14 is closed and the second solenoid valve 15 is opened, so that the refrigerant is switched to the second pipeline 17 for slow transmission.
Wherein the first threshold value is determined according to the total weight of the refrigerant accommodated by the automobile air conditioner. For example, when the total weight of the refrigerant contained in the vehicle air conditioner is 550 grams, the first threshold value may be set to 500 grams. Specifically, the vehicle type of a part of the vehicles may know the total weight of the refrigerant contained in the vehicle air conditioner, for example, the value of the total weight is marked at the vehicle air conditioner and its surroundings, and may be seen by a refrigeration processing operator, or may be stored in an electronic control device of the vehicle and may be read by a refrigerant processing device, or the refrigerant processing device may pre-store a corresponding relationship between the vehicle type and the total weight of the refrigerant, and may determine the corresponding total weight according to the vehicle type, and may determine the first threshold value according to the obtained total weight, for example, the first threshold value is 95% of the total weight; the total weight of the refrigerant contained in the air conditioner of some vehicle types cannot be known, and the refrigerant processing device can estimate the first threshold value, such as according to the vehicle size or the known air conditioner size, or setting the first threshold value as a constant value, or calculating the first threshold value according to the corresponding relation between the pre-stored vehicle type and the total weight of the refrigerant. Before the transmission amount of the refrigerant reaches the first threshold value, the refrigerant is transmitted by adopting a pipeline with a large pipe diameter, so that the high-efficiency transmission of the refrigerant can be ensured, and after the transmission amount of the refrigerant reaches the first threshold value, the refrigerant is transmitted by adopting a light path with a small pipe diameter, so that the high-precision filling or recovery of the refrigerant can be ensured.
Step 130: and acquiring the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner.
Further, the ambient heat temperature of the vehicle air conditioner in the current working state and working environment and the refrigeration effect temperature of the vehicle air conditioner under the current refrigeration cycle are obtained. The working state refers to a working state that the current automobile air conditioner is in refrigeration, the working environment refers to the current ambient temperature inside and outside the automobile air conditioner, the working state can be specifically determined by measuring the temperature of copper pipes of the evaporator arranged inside and outside the automobile air conditioner, and the temperature outside the automobile air conditioner specifically refers to the temperature inside the automobile.
Step 140: and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
Specifically, the transmission amount may be adjusted and controlled for multiple times according to the comparison result between the ambient heat temperature and the refrigeration effect temperature until the ambient heat temperature is substantially the same as the refrigeration effect temperature, where substantially the same means that the difference between the ambient heat temperature and the refrigeration effect is zero or the difference is within a preset error range, and the preset range of the difference means substantially the same range. The transfer amount may be determined in proportion to the difference, where the difference may be a positive value or a negative value, where a positive value of the difference indicates that the vehicle air conditioner needs to be refilled, and a negative value of the difference indicates that the vehicle air conditioner needs to be recycled.
It should be noted that, in the fine adjustment process of the refrigerant processing device, only one operation of filling or recycling can be realized, that is, when the refrigerant processing device performs the operation of filling the refrigerant to the vehicle air conditioner, it is required to ensure that the difference value is always a positive value, which indicates that the vehicle air conditioner has not been filled, and if the difference value is a negative value in the filling process, it indicates that the vehicle air conditioner has been filled, and the refrigerant processing device cannot perform the operation of filling again to prevent the vehicle air conditioner from being damaged. The refrigerant processing equipment needs to control the transmission amount (filling amount) of the refrigerant in the filling process so as to ensure that the difference value obtained next time does not have a negative value; and if the difference value acquired next time is within the preset range or the negative value of the difference value is within the error allowable range, finishing the charging operation of the refrigerant treatment equipment and stopping charging. Similarly, when the refrigerant processing equipment recovers the refrigerant for the automobile air conditioner, the difference value is required to be a negative value or zero all the time, and the difference value is a positive value and is required to be within an error allowable range. The operation method is the same as the filling process, and is not described herein.
After the ambient heat temperature and the refrigeration effect temperature are obtained, whether the ambient heat temperature is consistent with the refrigeration effect temperature or not is judged, and if the ambient heat temperature is not consistent with the refrigeration effect temperature, a difference value between the ambient heat temperature and the refrigeration effect temperature is determined so as to determine whether the refrigerant reaches the total weight of the refrigerant accommodated by the automobile air conditioner during filling, namely whether the refrigerant in the automobile air conditioner reaches dynamic balance or not, or whether the refrigerant is completely recycled or not is determined.
The embodiment of the invention provides a refrigerant transmission method, which is applied to refrigerant processing equipment, and the method comprises the steps of firstly controlling a refrigerant to be transmitted between an automobile air conditioner and the refrigerant processing equipment through a first pipeline, measuring the weight change of the refrigerant in the refrigerant processing equipment, switching the refrigerant to a second pipeline for transmission when the weight change of the refrigerant reaches a first threshold value, then obtaining the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner, and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
In some embodiments, the ambient heat temperature in the vehicle air conditioner may be determined by the heat temperature (SH) taken from the evaporator by the refrigerant, see fig. 4, which shows a sub-flowchart of step 120 of the method shown in fig. 3, based on the method shown in fig. 3, the step 120 further includes:
step 121 a: a first pressure of a low pressure line of the refrigerant processing device is detected.
In an embodiment of the present invention, a first pressure sensor P1, as shown in the above application scenario, may be used to detect a first pressure of a low pressure line for communication with a vehicle air conditioner. Preferably, the first pressure sensor P1 is disposed in a pipeline.
Step 122 a: based on the first pressure, an evaporation temperature of the refrigerant at the first pressure is determined.
Since the evaporation of the substance has corresponding evaporation characteristics, the evaporation pressure corresponds to the evaporation temperature, and after the first pressure is obtained, the evaporation temperature of the refrigerant at the first pressure can be determined according to the low-pressure. Specifically, a relational table or a relational expression between the evaporation pressure and the evaporation temperature of the refrigerant needs to be determined according to the chemical composition of the refrigerant, so that the evaporation temperature of the refrigerant at the first pressure can be obtained through query after the first pressure is determined.
Step 123 a: and detecting the gas temperature of the gas formed after the refrigerant in the automobile air conditioner is evaporated by the evaporator.
Further, the gas temperature of the gas formed after the refrigerant is evaporated by the evaporator is determined by the first temperature sensor T1 as described in the above application scenario. Preferably, the first temperature sensor T1 is disposed in the pipeline.
Step 124 a: and calculating the ambient heat temperature in the automobile air conditioner according to the evaporation temperature and the gas temperature.
After the evaporation temperature and the gas temperature are determined, the temperature of heat transferred to the environment when the refrigerant passes through the evaporator and is converted from liquid to gas can be determined, wherein the calculation formula for calculating the temperature of heat taken away by the refrigerant in the automobile air conditioner after passing through the evaporator of the automobile air conditioner is as follows:
SH＝Tsat-Tboing
where SH represents the ambient heat temperature, Tsat represents the gas temperature, and tboring represents the evaporation temperature.
In some embodiments, the ambient heat temperature in the air conditioner of the vehicle may also be determined by the temperature of heat (SC) taken from the condenser by the refrigerant, see fig. 5, which shows another sub-flowchart of step 120 in the method shown in fig. 3, based on the method shown in fig. 3, where the step 120 further includes:
step 121 b: detecting a second pressure of a high pressure line of the refrigerant processing device.
In the embodiment of the present invention, the second pressure sensor P2, as shown in the above application scenario, may be used to detect the second pressure of the high-pressure line for connection to the vehicle air conditioner. Preferably, the second pressure sensor P2 is disposed in the conduit.
Step 122 b: determining a condensing temperature of the refrigerant at the second pressure based on the second pressure.
Since substance condensation has corresponding condensation characteristics, and the condensation pressure and the condensation temperature are in corresponding relation, after the second pressure is obtained, the condensation temperature of the refrigerant at the second pressure can be determined according to the second pressure. Specifically, a relation table or a relation between the condensing pressure and the condensing temperature of the refrigerant needs to be determined according to the chemical composition of the refrigerant, so that the condensing temperature of the refrigerant at the second pressure can be obtained through query after the second pressure is determined.
Step 123 b: and detecting the liquid temperature of liquid formed after the refrigerant in the automobile air conditioner is condensed by the condenser.
Further, the liquid temperature of the liquid formed after the refrigerant is condensed by the condenser is determined by the second temperature sensor T2 as described in the above application scenario. Preferably, the second temperature sensor T2 is disposed in the pipeline.
Step 124 b: and calculating the ambient heat temperature in the automobile air conditioner according to the condensation temperature and the liquid temperature.
After the condensation temperature and the liquid temperature are determined, the heat temperature in the environment absorbed when the refrigerant passes through the condenser and is converted from gas to liquid can be determined, wherein the calculation formula for calculating the environment heat temperature in the automobile air conditioner is as follows:
SC＝Tliq-Tcooling
where SC represents the ambient heat temperature, Tliq represents the liquid temperature, and Tcooling represents the condensing temperature.
In some embodiments, the refrigerant treatment device further comprises: referring to fig. 6 together, which shows a sub-flowchart of step 130 in the method shown in fig. 3, based on the method shown in fig. 3, the step 130 further includes:
step 131: and acquiring the indoor wet bulb temperature of the automobile air conditioner through the first temperature and humidity sensor.
Step 132: and acquiring the outdoor dry bulb temperature of the automobile air conditioner through the second temperature and humidity sensor.
Step 133: and calculating the refrigeration effect temperature of the refrigerant in the automobile air conditioner according to the indoor wet bulb temperature and the outdoor dry bulb temperature.
In the embodiment of the invention, in order to obtain the refrigeration effect temperature of the refrigerant in the automobile air conditioner, the refrigeration effect temperature can be determined by detecting the temperature of the internal environment and the external environment of the evaporator, and in order to ensure the detection precision, preferably, the temperature of the air inlet of the copper disc arranged inside the evaporator is detected as the indoor wet bulb temperature, and the temperature of the air inlet of the copper disc arranged outside the evaporator (also in time inside the automobile) is detected as the outdoor dry bulb temperature. Further, according to the indoor wet bulb temperature and the outdoor dry bulb temperature, the refrigerating effect temperature can be several, and the calculation formula for calculating the refrigerating effect temperature in the automobile air conditioner is as follows:
wherein, TSH represents the refrigeration effect temperature, IDWB represents the indoor wet bulb temperature, and ODDB represents the outdoor dry bulb temperature.
The present invention provides an embodiment of a refrigerant transmission device, please refer to fig. 7 together, which is a schematic structural diagram of a refrigerant transmission device according to an embodiment of the present invention, the refrigerant transmission device 200 is applied to a refrigerant processing apparatus, the refrigerant processing apparatus is respectively connected to an automotive air conditioner through a first pipeline and a second pipeline, a pipe diameter of the first pipeline is greater than a pipe diameter of the second pipeline, the refrigerant transmission device 200 includes: a first control module 210, a switching module 220, an acquisition module 230, and a second control module 240.
The first control module 210 is configured to control the transmission of the refrigerant between the vehicle air conditioner and the refrigerant processing device through the first pipeline, and measure the weight change of the refrigerant in the refrigerant processing device;
the switching module 220 is configured to switch the refrigerant to the second pipeline for transmission when the weight change of the refrigerant reaches a first threshold;
the obtaining module 230 is configured to obtain an ambient heat temperature and a cooling effect temperature in the automobile air conditioner;
the second control module 240 is configured to control a transmission amount of the refrigerant between the vehicle air conditioner and the refrigerant processing device according to a comparison result between the ambient heat temperature and the cooling effect temperature.
In some embodiments, the first threshold is determined based on a total weight of refrigerant contained by the vehicle air conditioner.
In some embodiments, the obtaining module 230 is further configured to detect a first pressure of a low pressure line of the refrigerant treatment device;
determining an evaporation temperature of the refrigerant at the first pressure based on the first pressure;
detecting the gas temperature of gas formed after the refrigerant in the automobile air conditioner is evaporated by the evaporator;
and calculating the ambient heat temperature in the automobile air conditioner according to the evaporation temperature and the gas temperature.
In some embodiments, the calculation formula for calculating the ambient heat temperature in the vehicle air conditioner is as follows:
SH＝Tsat-Tboing
where SH represents the ambient heat temperature, Tsat represents the gas temperature, and tboring represents the evaporation temperature.
In some embodiments, the obtaining module 230 is further configured to detect a second pressure of a high pressure line of the refrigerant processing device;
determining a condensing temperature of the refrigerant at the second pressure based on the second pressure;
detecting the liquid temperature of liquid formed after a refrigerant in the automobile air conditioner is condensed by a condenser;
and calculating the ambient heat temperature in the automobile air conditioner according to the condensation temperature and the liquid temperature.
In some embodiments, the calculation formula for calculating the ambient heat temperature in the vehicle air conditioner is as follows:
SC＝Tliq-Tcooling
where SC represents the ambient heat temperature, Tliq represents the liquid temperature, and Tcooling represents the condensing temperature.
In some embodiments, the refrigerant treatment device further comprises: a first temperature and humidity sensor used for being arranged at a copper disc air inlet arranged inside the evaporator, a second temperature and humidity sensor used for being arranged at a copper disc air inlet arranged outside the evaporator,
the obtaining module 230 is further configured to obtain an indoor wet bulb temperature of the vehicle air conditioner through the first temperature and humidity sensor;
acquiring the outdoor dry bulb temperature of the automobile air conditioner through the second temperature and humidity sensor;
and calculating the refrigeration effect temperature of the refrigerant in the automobile air conditioner according to the indoor wet bulb temperature and the outdoor dry bulb temperature.
In some embodiments, the formula for calculating the cooling effect temperature in the vehicle air conditioner is as follows:
wherein, TSH represents the refrigeration effect temperature, IDWB represents the indoor wet bulb temperature, and ODDB represents the outdoor dry bulb temperature.
In some embodiments, the second control module 240 is further configured to control the transmission amount of the refrigerant according to the difference between the ambient heat temperature and the cooling effect temperature for a plurality of times until the difference between the ambient heat temperature and the cooling effect temperature is within a preset range.
In some embodiments, the amount of transmission is proportional to the difference.
It should be noted that, since the refrigerant transfer device in the present embodiment is based on the same inventive concept as the method embodiment described above, the corresponding content in the method embodiment is also applicable to the device embodiment, and is not described in detail herein.
Further, referring to fig. 8 together, a refrigerant processing device according to an embodiment of the present invention is shown in a hardware structure of a refrigerant processing device capable of performing the refrigerant transmission method described in fig. 3 to fig. 6. The refrigerant treatment device 10 may be the refrigerant treatment device shown in fig. 1 and/or fig. 2.
The refrigerant treatment device 10 includes:
a low pressure pipeline 11a, one end of which is used for connecting with a low pressure pipe service port of an automobile air conditioner;
one end of the high-pressure pipeline 11b is used for being connected with a high-pressure pipe service port of the automobile air conditioner;
a storage tank 12 for storing a refrigerant;
an electronic scale 13 for weighing the weight of the storage tank;
a first pipe 16 having one end connected to the storage tank and the other end connected to the other end of the low pressure pipe or the other end of the high pressure pipe;
a second pipeline 17, one end of which is connected to the storage tank, the other end of which is connected to the other end of the low pressure pipeline or the other end of the high pressure pipeline, and the pipe diameter of the first pipeline is larger than that of the second pipeline;
the first electromagnetic valve 14 is used for controlling the on-off of the first pipeline;
the second electromagnetic valve 15 is used for controlling the on-off of the second pipeline;
the first air pressure sensor P1 is arranged at one end of the low-pressure pipeline close to the first electromagnetic valve and the second electromagnetic valve;
the second air pressure sensor P2 is arranged at one end of the high-pressure pipeline close to the first electromagnetic valve and the second electromagnetic valve;
a first temperature sensor T1 for being installed between an evaporator and a compressor of the car air conditioner and near the low pressure pipe service port;
a second temperature sensor T2 for being installed between the compressor and the desiccant of the vehicle air conditioner and close to the high-pressure pipe service port;
the first temperature and humidity sensor IDWB is used for being installed at a copper plate air inlet inside the evaporator;
the second temperature and humidity sensor ODDB is used for being installed at a copper disc air inlet outside the evaporator;
at least one processor 101 connected to the electronic scale 13, the first solenoid valve 14, the second solenoid valve 15, the first barometric pressure sensor P1, the second barometric pressure sensor P2, the first temperature sensor T1, the second temperature sensor T2, the first temperature/humidity sensor IDWB, and the second temperature/humidity sensor ODDB; and a memory 102 communicatively coupled to the at least one processor 101, which is exemplified by one processor 101 in fig. 8.
It should be noted that the low-pressure pipeline, the high-pressure pipeline, the storage tank, the electronic scale, the first pipeline, the second pipeline, the first electromagnetic valve, the second electromagnetic valve, the first air pressure sensor, the second air pressure sensor, the first temperature sensor, the second temperature sensor, the first temperature and humidity sensor, the second temperature and humidity sensor, and the like may be the devices shown in the application scenarios and the embodiments shown in fig. 1 and/or fig. 2, and detailed description thereof is omitted.
The memory 102 stores instructions executable by the at least one processor 101 to enable the at least one processor 101 to perform the refrigerant delivery method described above with reference to fig. 3-6. The processor 101 and the memory 102 may be connected by a bus or other means, and fig. 8 illustrates the connection by a bus as an example.
The memory 102, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the refrigerant delivery method in the embodiments of the present application, for example, the respective modules shown in fig. 7. The processor 101 executes various functional applications and data processing of the refrigerant processing device by executing nonvolatile software programs, instructions and modules stored in the memory 102, that is, implements the refrigerant transmission method shown in the above-described method embodiment.
The memory 102 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the refrigerant transfer device, and the like. Further, the memory 102 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 102 may optionally include memory located remotely from the processor 101, which may be connected to the refrigerant transport device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 102 and, when executed by the one or more processors 101, perform the refrigerant delivery method of any of the method embodiments described above, e.g., performing the method steps of fig. 3-6 described above, implementing the functions of the modules and units of fig. 7.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in the embodiments of the present application.
Embodiments of the present application also provide a non-transitory computer-readable storage medium storing computer-executable instructions for execution by one or more processors, for example, to perform the method steps of fig. 3-6 described above to implement the functions of the modules in fig. 7.
Embodiments of the present application also provide a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform a refrigerant delivery method in any of the above-described method embodiments, e.g., to perform the method steps of fig. 3-6 described above, to implement the functions of the various modules in fig. 7.
The embodiment of the invention provides a refrigerant transmission method, which is applied to refrigerant processing equipment, and the method comprises the steps of firstly controlling a refrigerant to be transmitted between an automobile air conditioner and the refrigerant processing equipment through a first pipeline, measuring the weight change of the refrigerant in the refrigerant processing equipment, switching the refrigerant to a second pipeline for transmission when the weight change of the refrigerant reaches a first threshold value, then obtaining the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner, and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a general hardware platform, and certainly can also be implemented by hardware. It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (13)
1. A refrigerant transmission method is characterized by being applied to refrigerant treatment equipment, wherein the refrigerant treatment equipment is respectively connected with an automobile air conditioner through a first pipeline and a second pipeline, the pipe diameter of the first pipeline is larger than that of the second pipeline, and the method comprises the following steps:
controlling refrigerant to be transferred between the vehicle air conditioner and the refrigerant processing device through the first pipeline, and measuring weight change of the refrigerant in the refrigerant processing device;
when the weight change of the refrigerant reaches a first threshold value, switching the refrigerant to the second pipeline for transmission;
acquiring the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner;
and controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
2. The method of claim 1,
the first threshold value is determined according to the total weight of the refrigerant accommodated by the automobile air conditioner.
3. The method of claim 1, wherein the step of obtaining the ambient heat temperature in the vehicle air conditioner further comprises:
detecting a first pressure of a low pressure line of the refrigerant treatment device;
determining an evaporation temperature of the refrigerant at the first pressure based on the first pressure;
detecting the gas temperature of gas formed after a refrigerant in the automobile air conditioner is evaporated by an evaporator;
and calculating the ambient heat temperature in the automobile air conditioner according to the evaporation temperature and the gas temperature.
4. The method according to claim 3, wherein the calculation formula for calculating the ambient heat temperature in the vehicle air conditioner is as follows:
SH＝Tsat-Tboing
where SH represents the ambient heat temperature, Tsat represents the gas temperature, and tboring represents the evaporation temperature.
5. The method of claim 1, wherein the step of obtaining the ambient heat temperature in the vehicle air conditioner further comprises:
detecting a second pressure of a high pressure line of the refrigerant processing device;
determining a condensing temperature of the refrigerant at the second pressure based on the second pressure;
detecting the liquid temperature of liquid formed after a refrigerant in the automobile air conditioner is condensed by a condenser;
and calculating the ambient heat temperature in the automobile air conditioner according to the condensation temperature and the liquid temperature.
6. The method according to claim 5, wherein the calculation formula for calculating the ambient heat temperature in the vehicle air conditioner is as follows:
SC＝Tliq-Tcooling
where SC represents the ambient heat temperature, Tliq represents the liquid temperature, and Tcooling represents the condensing temperature.
7. The method of claim 1, wherein the refrigerant processing device further comprises: a first temperature and humidity sensor used for being arranged at a copper disc air inlet arranged inside the evaporator, a second temperature and humidity sensor used for being arranged at a copper disc air inlet arranged outside the evaporator,
the step of obtaining the refrigeration effect temperature in the automobile air conditioner further includes:
acquiring the indoor wet bulb temperature of the automobile air conditioner through the first temperature and humidity sensor;
acquiring the outdoor dry bulb temperature of the automobile air conditioner through the second temperature and humidity sensor;
and calculating the refrigeration effect temperature of the refrigerant in the automobile air conditioner according to the indoor wet bulb temperature and the outdoor dry bulb temperature.
8. The method according to claim 7, wherein the calculation formula for calculating the cooling effect temperature in the vehicle air conditioner is as follows:
wherein, TSH represents the refrigeration effect temperature, IDWB represents the indoor wet bulb temperature, and ODDB represents the outdoor dry bulb temperature.
9. The method as set forth in claim 1, wherein said step of controlling the amount of refrigerant transferred between said vehicle air conditioner and said refrigerant treatment device according to the result of comparing said ambient heat temperature with said cooling effect temperature further comprises:
and controlling the transmission quantity of the refrigerant for multiple times according to the difference value between the environment heat temperature and the refrigeration effect temperature until the difference value between the environment heat temperature and the refrigeration effect temperature is within a preset range.
10. The method of claim 9, wherein the amount of transmission is proportional to the difference.
11. A refrigerant transmission device is characterized by being applied to refrigerant processing equipment, wherein the refrigerant processing equipment is respectively connected with an automobile air conditioner through a first pipeline and a second pipeline, the pipe diameter of the first pipeline is larger than that of the second pipeline, and the device comprises:
the first control module is used for controlling refrigerant to be transmitted between the automobile air conditioner and the refrigerant processing equipment through the first pipeline and measuring weight change of the refrigerant in the refrigerant processing equipment;
the switching module is used for switching the refrigerant to the second pipeline for transmission when the weight change of the refrigerant reaches a first threshold value;
the acquisition module is used for acquiring the ambient heat temperature and the refrigeration effect temperature in the automobile air conditioner;
and the second control module is used for controlling the transmission quantity of the refrigerant between the automobile air conditioner and the refrigerant processing equipment according to the comparison result of the ambient heat temperature and the refrigeration effect temperature.
12. A refrigerant treatment apparatus, comprising:
one end of the low-pressure pipeline is used for being connected with a low-pressure pipe service port of the automobile air conditioner;
one end of the high-pressure pipeline is used for being connected with a high-pressure pipe service port of the automobile air conditioner;
a storage tank for storing a refrigerant;
the electronic scale is used for weighing the weight of the storage tank;
a first pipeline, one end of which is connected with the storage tank and the other end of which is connected with the other end of the low-pressure pipeline or the other end of the high-pressure pipeline;
one end of the second pipeline is connected with the storage tank, the other end of the second pipeline is connected with the other end of the low-pressure pipeline or the other end of the high-pressure pipeline, and the pipe diameter of the first pipeline is larger than that of the second pipeline;
the first electromagnetic valve is used for controlling the on-off of the first pipeline;
the second electromagnetic valve is used for controlling the on-off of the second pipeline;
the first air pressure sensor is arranged at one end of the low-pressure pipeline close to the first electromagnetic valve and the second electromagnetic valve;
the second air pressure sensor is arranged at one end of the high-pressure pipeline close to the first electromagnetic valve and the second electromagnetic valve;
the first temperature sensor is used for being installed between an evaporator and a compressor of the automobile air conditioner and is close to the low-pressure pipe service port;
the second temperature sensor is used for being arranged between a compressor and a drying agent of the automobile air conditioner and is close to the high-pressure pipe service port;
the first temperature and humidity sensor is used for being installed at a copper disc air inlet inside the evaporator;
the second temperature and humidity sensor is used for being installed at a copper disc air inlet outside the evaporator;
at least one processor connected to the electronic scale, the first solenoid valve, the second solenoid valve, the first barometric pressure sensor, the second barometric pressure sensor, the first temperature sensor, the second temperature sensor, the first temperature and humidity sensor, and the second temperature and humidity sensor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-10.
13. A computer program product, characterized in that the computer program product comprises a computer program stored on a computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to carry out the method according to any one of claims 1-10.
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| CN202010182796.2A CN111336728B (en) | 2020-03-16 | 2020-03-16 | Refrigerant transmission method and device and refrigerant treatment equipment |
| PCT/CN2021/079165 WO2021185095A1 (en) | 2020-03-16 | 2021-03-04 | Refrigerant conveying method and apparatus, and refrigerant processing device |
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| CN202010182796.2A CN111336728B (en) | 2020-03-16 | 2020-03-16 | Refrigerant transmission method and device and refrigerant treatment equipment |
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| WO2021185095A1 (en) | 2021-09-23 |
| CN111336728B (en) | 2021-12-10 |
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