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Method for evaluating fatigue reliability of piping of inverter air conditioner

A frequency conversion air conditioner, reliability technology, applied in the direction of instruments, scientific instruments, strength characteristics, etc., can solve problems such as misjudgment

Active Publication Date: 2013-07-31
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most enterprises usually use the method of fatigue reliability evaluation of fixed-frequency air conditioner piping, which often causes "wrong judgment" and "missing judgment" in engineering practice

Method used

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  • Method for evaluating fatigue reliability of piping of inverter air conditioner
  • Method for evaluating fatigue reliability of piping of inverter air conditioner

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Experimental program
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Embodiment Construction

[0030] see figure 1 , The piping system of the inverter air conditioner compressor involves the compressor body 1, the liquid storage tank 2, the exhaust port 4 located on the top of the compressor body 1, the air return port 3 located on the top of the liquid storage tank 2, the exhaust pipe 5 and the exhaust port 4-phase connection, the return air pipe 6 is connected to the return air port 3, and there is a four-way valve 7, and a valved condenser connecting pipe 8 is connected between the four-way valve 7 and the condensation valve connecting pipe 11, and the low-pressure valve connecting pipe 9 is connected to Between the four-way valve 7 and the low pressure valve 10.

[0031] The piping is one of the most important structures of the inverter air conditioner, and the objective evaluation of its fatigue reliability is the key to avoiding the fatigue failure of the piping due to the alternating load during the operation of the inverter air conditioner. The fatigue reliabil...

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Abstract

The invention discloses a method for evaluating the fatigue reliability of a piping of an inverter air conditioner. The method is characterized by comprising the following steps of: according to the stress test of the piping of the inverter air conditioner, obtaining the stress value of the piping when a compressor runs under different working frequencies; computing the allowable stress when the piping of the inverter air conditioner has unlimited service life corresponding to the working frequencies according to the working frequency of a fixed frequency air conditioner and the allowable stress when the piping of the fixed frequency air conditioner has unlimited service life; and according to the obtained stress value, the probability that the compressor of the inverter air conditioner runs under different frequencies, and the allowable stress when the piping has unlimited service life corresponding to the different frequencies, computing to obtain the fatigue reliability evaluation index of the piping of the inverter air conditioner. The method in the invention can be used for instructing engineering technical personnel to objectively and scientifically evaluate the fatigue reliability of the piping according to the stress test result of the piping of the inverter air conditioner, so that the technical reference can be provided for the design and the rectification of the piping.

Description

technical field [0001] The invention relates to a method for evaluating the fatigue reliability of the piping of an inverter air conditioner, which is mainly used for evaluating the fatigue reliability of the piping of the inverter air conditioner according to the stress test results of the piping of the inverter air conditioner. Background technique [0002] The air conditioner piping stress test is a method to test the stress value of the piping of the air conditioner under various operating conditions, so as to evaluate the fatigue reliability of the piping. After years of accumulation, a relatively mature method system has been formed in the aspects of stress testing and fatigue reliability evaluation of fixed-frequency air conditioner piping. During the operation of the inverter air conditioner, due to the variable working conditions of the compressor, the stress test and fatigue reliability evaluation of its piping are quite different from those of the fixed frequency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/00
Inventor 卢剑伟杨磊胡辰许生孙晓明洪杰韩全史沛瑶陈渊峰张智刘宁
Owner HEFEI UNIV OF TECH
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