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General control method and standard refrigeration equipment based on refrigerant identification

A general control and refrigeration equipment technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of unable to automatically identify refrigerants, human factors are greatly affected, invalid tests, etc., to achieve reasonable and credible test results, Improve calibration efficiency and avoid the effect of invalid testing

Active Publication Date: 2021-11-30
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the standard refrigeration equipment used to calibrate the test capacity of the air-conditioning capacity test bench is greatly affected by human factors. Often only a certain type of refrigerant can be used and matched with the corresponding control method and operating parameters, and the requirements for test uncertainty are also fixed. , when the refrigerant used in the standard refrigeration equipment does not match the control method due to human factors, it is impossible to automatically identify the refrigerant used and adjust the control parameters, and it is also impossible to identify the non-azeotropic refrigerant due to the complexity of the phase change process, resulting in the uncertainty of the capability test High problems, abnormalities cannot be corrected quickly, and invalid tests are likely to occur

Method used

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  • General control method and standard refrigeration equipment based on refrigerant identification

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Effect test

Embodiment 1

[0031] see figure 1 , the general control method based on refrigerant identification of the present invention comprises the following steps:

[0032] After the standard machine starts the test, determine the candidate refrigerant sequence (because the pressure and temperature of the refrigerant in the two-phase area correspond one-to-one, under the same pressure, the refrigerant sequence with high saturation temperature is in the front, and the refrigerant sequence with low saturation temperature is in the rear ), select the refrigerant and set the maximum internal fan speed to ensure that the evaporator outlet refrigerant is in a superheated state, collect the evaporator outlet pressure Po and temperature To, calculate the evaporator outlet superheat Tsh and determine whether its absolute value is acceptable Within the range, dTmax is the absolute value of the maximum acceptable superheat. If the requirements are not met, the internal fan speed w will be reduced. If the requi...

Embodiment 2

[0036] The general control method based on refrigerant identification of the present invention is described below with specific cases:

[0037] The standard machine enters the test mode, determines the refrigerant sequence such as [R290, R22, R410A, R32...], and after running for a period of time under the rated cooling conditions (inside 27 / 19, outside 35 / 24), the controller starts to collect and run Data, dTmax=0.5°C, dmax=0.05:

[0038] Suppose the refrigerant used is R290, the outlet pressure of the collection evaporator is 0.5Mpa, the corresponding saturation temperature is 8.09°C, and the outlet temperature is 8.3°C, then the degree of superheat |Tsh|=|8.3-8.09|=0.21°C<0.5°C, superheat If the heat meets the requirements, enter the next step. If the superheat does not meet the requirements, reduce the speed w of the internal fan and cycle this process;

[0039] The inlet temperature of the collection evaporator is Ti=9.8°C, the inlet pressure is Pi=0.53Mpa,

[0040] The...

Embodiment 3

[0046] The general control method based on refrigerant identification in the standard refrigeration equipment application embodiment of the present invention.

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Abstract

The invention discloses a general control method based on refrigerant identification and standard refrigeration equipment. The method is: after the standard refrigeration equipment starts testing, determine the candidate refrigerant sequence; select the refrigerant and set the maximum internal fan speed w; Collect the evaporator outlet pressure Po and inlet temperature To and calculate the evaporator outlet superheat Tsh; determine the evaporator outlet superheat |Tsh|

Description

technical field [0001] The invention relates to an air conditioner detection device and a detection method, in particular to a general control method based on refrigerant identification and standard refrigeration equipment. Background technique [0002] At present, the standard refrigeration equipment used to calibrate the test capacity of the air-conditioning capacity test bench is greatly affected by human factors. Often only a certain type of refrigerant can be used and matched with the corresponding control method and operating parameters, and the requirements for test uncertainty are also fixed. , when the refrigerant used in the standard refrigeration equipment does not match the control method due to human factors, it is impossible to automatically identify the refrigerant used and adjust the control parameters, and it is also impossible to identify the non-azeotropic refrigerant due to the complexity of the phase change process, resulting in the uncertainty of the cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00F25B49/00
CPCF25B49/00G01M99/002G01M99/005
Inventor 张晨旭于桥林张世强黄允棋
Owner GREE ELECTRIC APPLIANCES INC