Air-conditioning reversing valve and air-conditioning system

Abstract

The invention discloses an air-conditioning system and an air-conditioning reversing valve. The air-conditioning reversing valve comprises a valve body and a valve spool, the valve spool comprises a piston part, the piston part comprises a piston cup and an elastic plate, the piston cup comprises a base plate and a frustum-shaped cup body, and the elastic plate comprises an elastic base plate and a frustum-shaped ring formed by a plurality of elastic pieces. The ratio of the thickness of each elastic piece to the thickness of the wall of the cup body is not smaller than 0.15 and not larger than 0.30. When in free state, the ratio of the maximum diameter of the frustum-shaped ring to the diameter of the inner cavity of the valve body is not smaller than 0.99 and not larger than 1.07, and the ratio of the maximum diameter of the cup body to the diameter of the inner cavity of the valve body is not smaller than 1.02 and not larger than 1.09. When at low temperature, the piston cup can be kept to contact with the valve body by the air-conditioning reversing valve, and affection on the sealing performance between the valve spool and the valve body from the low temperature can be reduced. When at high temperature, acting force of the piston cup to the valve body can be kept within a proper range by the air-conditioning valve, and pressure difference of reversing of the air-conditioning reversing valve at high temperature can be reduced.

Description

technical field [0001] The invention relates to an air-conditioning system control technology, in particular to an air-conditioning reversing valve and an air-conditioning system including the air-conditioning reversing valve. Background technique [0002] With the internationalization of the market and the globalization of the market, the same air-conditioning system may be sold and used all over the world; due to the different environmental conditions in various places, the air-conditioning system is required to have greater adaptability to meet the needs of global sales. An important aspect of the adaptability of air conditioning systems is the ability to accommodate a greater range of ambient temperatures. For example: when used in a cold area, the components of the air conditioning system are required to work normally in an environment of -25°C, and when used in a hot area, the components of the air conditioning system are required to work normally in an environment of ...

AI Technical Summary

Problems solved by technology

[0011] However, depending on the temperature of the external environment, the shrinkage of the piston bowl 100 will also change accordingly.

Under the environment of +25°C, the shrinkage of the piston bowl 100 can meet the normal operation of the air conditioner reversing valve; under the environment of -25°C, due to the increase of the shrinkage of the piston bowl 100, it will affect the relationship between the valve core and the valve body. The sealing performance between the middle chamber and the left or right chamber will cause leakage between the middle chamber and the reversing valve of the air conditioner.

In the environment of -25°C, the shrinkage of the piston bowl 100 can meet the normal operation of the air conditioner reversing valve, and in the environment of +25°C, due to the reduction of the shrinkage of the piston bowl 100, it will increase the piston bowl 100 to the valve body. The force of the cavity increases the driving force required by the valve core, resulting in an increase in the reversing pressure at +25 degrees, and the action pressure difference of the reversing valve of the air conditioner is too large, which affects the smooth progress of the reversing

As a result, the air conditioning reversing valve cannot adapt to a wider range of ambient temperatures, making its adaptability unable to meet the current requirements for air conditioning systems

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