CN108800430B - Air conditioning system, and method and device for measuring weight of refrigerant of air conditioning system - Google Patents
Air conditioning system, and method and device for measuring weight of refrigerant of air conditioning system Download PDFInfo
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- CN108800430B CN108800430B CN201810709601.8A CN201810709601A CN108800430B CN 108800430 B CN108800430 B CN 108800430B CN 201810709601 A CN201810709601 A CN 201810709601A CN 108800430 B CN108800430 B CN 108800430B
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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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Abstract
The invention discloses an air conditioning system, and a method and a device for measuring the weight of a refrigerant of the air conditioning system, wherein the method for measuring the weight of the refrigerant of the air conditioning system specifically comprises the steps of controlling a compressor and an electromagnetic valve to enable the refrigerant to be completely stored in an outdoor unit or an indoor unit and to be completely discharged to the outdoor unit or the indoor unit; respectively measuring and calculating the weight of the outdoor unit or the indoor unit in the two states; the weight of the refrigerant is obtained by the weight difference between the outdoor unit and the indoor unit in the two states. The invention can measure the weight of the refrigerant of the air-conditioning system, and is beneficial to analyzing and solving various after-sale problems related to the refrigerant.
Description
Technical Field
The invention relates to a split air-conditioning system, in particular to a method and a device for measuring the weight of a refrigerant of an air-conditioning system and the air-conditioning system adopting the device.
Background
The weight of the refrigerant in the air conditioning system closely influences the use effect of the air conditioner, and many after-sale problems in the air conditioning industry are caused by abnormal refrigerant.
In the prior art, because the installation structure of the air conditioning system is complex, the weight calculation of the refrigerant in the industry still stays in an evaluation stage, namely, an engineer estimates whether the refrigerant is too much or too little according to the personal engineering experience and by referring to parameters such as system pressure, operation frequency, supercooling degree and the like, the estimation result obtained by the method is fuzzy and cannot be quantized, and more detailed support and help cannot be provided for analyzing and solving various sales problems caused by abnormal refrigerant.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a method for measuring the weight of a refrigerant in an air conditioning system, comprising:
controlling the compressor and the electromagnetic valve to enable all the refrigerants to be stored in the outdoor unit or the indoor unit and to be discharged to the outdoor unit or the indoor unit;
respectively measuring and calculating the weight of the outdoor unit or the indoor unit in the two states;
the weight of the refrigerant is obtained by the weight difference between the outdoor unit and the indoor unit in the two states.
Preferably, the weight difference is multiplied by an error correction value to obtain the weight of the refrigerant.
In one embodiment, the weight of the outdoor unit or the indoor unit in the two states is obtained by measuring the deformation in the two states when the outdoor unit or the indoor unit is supported and then calculating according to the deformation stress analysis. Whether the two states are achieved is judged by measuring whether the pressure in the pipeline of the air conditioning system reaches a corresponding critical value and continuing for a certain time.
The invention also provides a device for measuring the weight of the refrigerant of the air-conditioning system, wherein the air-conditioning system comprises a compressor, a first electromagnetic valve connected to the inlet of the pipeline of the outdoor unit or the indoor unit, and a second electromagnetic valve connected to the outlet of the pipeline of the outdoor unit or the indoor unit; the device comprises: the pressure sensor module is used for detecting the pressure in a pipeline of the air conditioning system; the control module receives the detection result of the pressure sensor module, controls the first electromagnetic valve, the second electromagnetic valve and the compressor, and enables all refrigerants to be stored in the outdoor unit or the indoor unit and to be discharged to the outdoor unit or the indoor unit; and the measuring module is used for weighing the weight of the outdoor unit or the indoor unit under the two states and obtaining the weight of the refrigerant through the weight difference.
Further, the pressure sensor module comprises a low pressure sensor for detecting the pipeline pressure of the low pressure part of the air conditioning system and/or a high pressure sensor for detecting the pipeline pressure of the high pressure part of the air conditioning system.
Further, the control module opens the first electromagnetic valve, closes the second electromagnetic valve, operates the compressor, closes the compressor and the first electromagnetic valve after the value detected by the pressure sensor module reaches a critical value for a certain time, and the measuring module weighs and calculates the weight of the outdoor unit or the indoor unit when all the refrigerant is stored in the outdoor unit or the indoor unit.
Further, the control module opens the second solenoid valve, closes the first solenoid valve, operates the compressor, closes the compressor and the second solenoid valve when the value detected by the pressure sensor module reaches a critical value, and measures and calculates the weight of the outdoor unit or the indoor unit when all the refrigerant is discharged to the outdoor unit or the indoor unit.
Furthermore, the measuring module comprises a supporting column for supporting the outdoor unit or the indoor unit in the vertical direction, a stress sheet arranged on the supporting column for measuring the deformation generated by the supporting column, and an operation unit for obtaining the weight of the refrigerant by utilizing deformation stress analysis and calculation.
The invention also provides an air conditioning system which adopts the device in the technical scheme to calculate the weight of the refrigerant.
The invention has smart structure and simple calculation, can measure and calculate the weight of the refrigerant without increasing large cost, realizes the specific quantification of the weight of the refrigerant, and has great propulsion effect on analyzing, solving and preventing various after-sale problems.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
fig. 1 is a schematic structural diagram of an outdoor unit according to an embodiment of the present invention.
Fig. 2 is an installation diagram of an outdoor unit according to an embodiment of the present invention.
Fig. 3 is a side schematic view of the mounting post of the present invention.
Fig. 4 is a block diagram of the architecture of the present invention.
Detailed Description
Fig. 1 to 3 show an embodiment of the present invention, which calculates the weight of the refrigerant by weighing the weight difference of the outdoor unit 100 of the air conditioning system.
As shown in fig. 1, the outdoor unit 100 of the air conditioning system of the present invention is provided with a first solenoid valve 1, a compressor 2, a heat exchanger 3, and a second solenoid valve 4, which are connected in sequence, wherein the first solenoid valve 1 is disposed at an inlet of an outdoor unit pipe 5, and the second solenoid valve 4 is disposed at an outlet of the outdoor unit pipe 5.
As shown in fig. 2, in this embodiment, the outdoor unit 100 is connected to a fixing base 9 fixed to the ground by bolts through a support column 8.
As shown in fig. 3, the stress sheet 10 is attached to the supporting column 8, the outdoor unit 100 is supported by the supporting column 8, and the supporting column 8 is slightly deformed when being stressed by the pressure of the outdoor unit 100, and the deformation and the stress satisfy hooke's law within a certain range. The deformation of the support columns is detected through the strain gauges 10 attached to the support columns 8, and then the stress of all the support columns 8 in the vertical direction can be calculated according to the function relation corresponding to Hooke's law.
As shown in fig. 4, the apparatus for measuring the weight of the refrigerant in the air conditioning system according to the embodiment of the present invention mainly includes three modules, namely, a pressure sensor module, a control module and a measurement module.
The pipeline of any air conditioning system has a high pressure part and a low pressure part, and the pressure sensor module comprises a low pressure sensor 6 for detecting the pipeline pressure of the low pressure part of the air conditioning system and/or a high pressure sensor 7 for detecting the pipeline pressure of the high pressure part of the air conditioning system. The pressure sensor module is used for detecting the pressure in a pipeline of the air conditioning system.
The control module receives the detection result of the pressure sensor module and controls the first solenoid valve 1, the second solenoid valve 4 and the compressor 2.
The measuring module comprises a supporting column 8, a stress sheet 10 and an operation unit for calculating the weight of the refrigerant by using the deformation size and the combination function relationship.
Specifically, the control module opens the first solenoid valve 1, closes the second solenoid valve 4, operates the compressor 2, stores all the refrigerants in the outdoor unit 100 as far as possible, closes the compressor 2 and the first solenoid valve 1 when the high pressure value detected by the high pressure sensor or the low pressure value detected by the low pressure sensor reaches a critical value, and records the force F1 in the vertical direction converted from the supporting column deformation quantity (hooke's law function) at this time; the control module closes the first solenoid valve 1, opens the second solenoid valve 4, operates the compressor 2, and when the low pressure value detected by the high pressure sensor or the high pressure value detected by the low pressure sensor reaches a critical value, the compressor is stopped and the second solenoid valve is closed, so that all the refrigerant is discharged to the outdoor unit 100 as much as possible. After the state is stabilized for a while, the mass m of the refrigerant recording the force F2 of the outdoor unit 100 in the vertical direction may be preliminarily obtained by m = (F1-F2)/g.
However, since the refrigerant always remains in each component through which the air conditioner flows during operation and cannot be completely transferred cleanly, the mass m of the refrigerant has some error, and is preferably multiplied by an error correction value x to estimate the residual refrigerant on the indoor side and the pipeline, so that the mass m of the refrigerant = [ (F1-F2) × x ]/g, which can be determined by one skilled in the art according to specific situations, and in the present embodiment, the value of the error correction value x ranges from 1.05 to 1.1.
The above embodiments only show the weight difference of the outdoor unit to calculate the weight of the refrigerant, and accordingly, those skilled in the art can adopt the same method to measure the weight difference of the indoor unit to obtain the weight of the refrigerant. When the weight difference of the indoor unit is measured, the expansion valve of the indoor unit can be used as a first electromagnetic valve, and then a second electromagnetic valve is additionally arranged at the outlet of the pipeline.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A method of measuring the weight of a refrigerant in an air conditioning system, comprising:
controlling the compressor and the electromagnetic valve to enable all the refrigerants to be stored in the outdoor unit or the indoor unit and to be discharged to the outdoor unit or the indoor unit;
respectively measuring and calculating the weight of the outdoor unit or the indoor unit in the two states;
obtaining the weight of the refrigerant through the weight difference of the outdoor unit or the indoor unit in the two states;
measuring deformation generated when the outdoor unit or the indoor unit is supported in two states, and analyzing and calculating the weight of the outdoor unit or the indoor unit in the two states according to deformation stress;
whether the two states are achieved is judged by measuring whether the pressure in the pipeline of the air conditioning system reaches a corresponding critical value and continuing for a certain time.
2. A method of measuring the weight of a refrigerant in an air conditioning system as set forth in claim 1, wherein the weight difference is multiplied by an error correction value to obtain the weight of the refrigerant.
3. An apparatus for measuring a weight of a refrigerant of an air conditioning system including a compressor, a first solenoid valve connected to an inlet of a pipe of an outdoor unit or an indoor unit, and a second solenoid valve connected to an outlet of the pipe of the outdoor unit or the indoor unit, the apparatus comprising:
the pressure sensor module is used for detecting the pressure in a pipeline of the air conditioning system;
the control module receives the detection result of the pressure sensor module, controls the first electromagnetic valve, the second electromagnetic valve and the compressor, and enables all refrigerants to be stored in the outdoor unit or the indoor unit and to be discharged to the outdoor unit or the indoor unit;
the measuring module is used for weighing the weight of the outdoor unit or the indoor unit under the two states and obtaining the weight of the refrigerant through the weight difference;
the measurement module comprises a support column for supporting the outdoor unit or the indoor unit in the vertical direction, a stress sheet arranged on the support column for measuring the deformation generated by the support column, and an operation unit for analyzing and calculating the weight of the refrigerant by utilizing the deformation stress;
the control module opens the first electromagnetic valve, closes the second electromagnetic valve, operates the compressor, closes the compressor and the first electromagnetic valve after the value detected by the pressure sensor module reaches a critical value for a certain time, and the measuring module weighs and calculates the weight of the outdoor unit or the indoor unit when all the refrigerants are stored in the outdoor unit or the indoor unit.
4. The apparatus of claim 3, wherein the pressure sensor module comprises a low pressure sensor for detecting a line pressure of a low pressure part of the air conditioning system and/or a high pressure sensor for detecting a line pressure of a high pressure part of the air conditioning system.
5. The apparatus of claim 3, wherein the control module opens the second solenoid valve, closes the first solenoid valve, operates the compressor, closes the compressor and the second solenoid valve when the value detected by the pressure sensor module reaches a critical value, and measures and calculates the weight of the outdoor unit or the indoor unit when the refrigerant is completely discharged to the outdoor unit or the indoor unit.
6. The apparatus as claimed in claim 3, wherein the first solenoid valve connected at the inlet of the indoor unit pipe is an expansion valve.
7. An air conditioning system using the apparatus of any one of claims 3 to 6 to calculate the weight of refrigerant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810709601.8A CN108800430B (en) | 2018-07-02 | 2018-07-02 | Air conditioning system, and method and device for measuring weight of refrigerant of air conditioning system |
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| CN201810709601.8A CN108800430B (en) | 2018-07-02 | 2018-07-02 | Air conditioning system, and method and device for measuring weight of refrigerant of air conditioning system |
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| US5046322A (en) * | 1989-05-08 | 1991-09-10 | Kent-Moore Corporation | Electronic refrigerant transfer scale |
| CN1587925A (en) * | 2004-07-08 | 2005-03-02 | 上海交通大学 | Measuring device and its measuring method for measuring refrigerating agent weight in air conditioning heat exchanger |
| CN1936520B (en) * | 2006-10-13 | 2011-08-31 | 北京东方瑞威科技发展有限公司 | Data processing method of optical-fiber sensing type railroad track scale |
| KR101921538B1 (en) * | 2012-02-23 | 2018-11-23 | 엘지전자 주식회사 | Air conditioner and Control method of the same |
| US10429110B2 (en) * | 2014-12-30 | 2019-10-01 | Bosch Automotive Service Solutions Inc. | System and method for recovering refrigerant |
| CN107883619A (en) * | 2017-10-30 | 2018-04-06 | 重庆工业职业技术学院 | A kind of small refrigerant recycling machine TT＆C system and method |
| CN107990501B (en) * | 2017-11-27 | 2020-05-05 | 宁波奥克斯电气股份有限公司 | Refrigerant recovery method and air conditioner |
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