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Automobile air conditioner refrigerant charge quantity calibration method

A calibration method, the technology of automobile air conditioner, applied in the direction of measuring device, vehicle test, instrument, etc., can solve the problems of low, complex and accurate calibration method of refrigerant charging amount, etc., and achieve the goal of improving accuracy and shortening the calibration cycle Effect

Inactive Publication Date: 2016-12-07
HENAN NORMAL UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for calibrating the refrigerant charge of an automobile air conditioner with a short calibration period, high accuracy and a simple method in order to solve the defects of the existing refrigerant charge calibration method which is complicated and not high in accuracy

Method used

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  • Automobile air conditioner refrigerant charge quantity calibration method
  • Automobile air conditioner refrigerant charge quantity calibration method

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Experimental program
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Effect test

Embodiment

[0017] 1. Test preparation stage

[0018] It provides an accurate environmental simulation chamber for simulating the actual operating state of the vehicle, a refrigerant recovery charging machine for recovery and charging of refrigerant, and a data acquisition instrument for collecting temperature and pressure.

[0019] The precise environment simulation chamber is a closed chamber, which is equipped with a temperature and humidity control system, a fresh air system, a dynamometer system, an exhaust emission system, a sunlight simulation system and a data acquisition system, wherein the temperature and humidity control system is used to control the temperature and humidity of the closed chamber. The fresh air system is used to control the air supply and exhaust in the closed warehouse. The head-on fan is installed opposite the front of the vehicle to be tested to provide the head-on wind speed when the vehicle is actually running. The dynamometer system is installed at the bot...

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Abstract

The invention discloses an automobile air conditioner refrigerant charge quantity calibration method. First of all, an accurate environment simulation chamber used for simulating an actual operation state of a vehicle, a refrigerant recovery charge machine used for recovering and charging a refrigerant and a data acquisition instrument used for acquiring temperature and pressure data are provided; the vehicle is fixed in the accurate environment simulation chamber, the vehicle is enabled to run under a preset working condition, a fixed quantity of the refrigerant is charged every preset time, and condenser outlet pressure, condense outlet temperature, each air outlet temperature of a blowing surface in the vehicle and an external circulation inlet temperature are respectively acquired through the data acquisition instrument; and a relation curve between a condenser outlet subcooling degree and the condenser outlet pressure and a refrigerant charge quantity is drafted, and then, an optimal refrigerant charge quantity of an air conditioner system is obtained through calculation. The automobile air conditioner refrigerant charge quantity calibration method can obviously shorten the calibration period and improves the accuracy of refrigeration calibration to a quite large degree.

Description

technical field [0001] The invention belongs to the technical field of a test method for refrigerant charging amount of an automobile air-conditioning system, and in particular relates to a method for calibrating the refrigerant charging amount of an automobile air-conditioning system. Background technique [0002] The determination of the refrigerant charge of the automotive air-conditioning system mainly includes system simulation calculation methods, bench test methods, and vehicle test methods. The first two are only for research and analysis, and the final charge amount must be determined through the vehicle test. As for how to determine the optimal charge amount of refrigerant for automobile air conditioners, domestic automobile and air conditioner manufacturers do not have a unified test standard at present, and there are various judgments on the final results. With the wide application of subcooled condensers in automotive air-conditioning systems, relevant practitio...

Claims

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Application Information

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IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 陈得军李耀伟辛庆庆
Owner HENAN NORMAL UNIV
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