R410A refrigeration system self-adapting adjustment type expansion valve

Abstract

A R410A refrigerating system self-adaptive control type expanding valve, belongs to the field of the refrigeration technology, wherein a cylinder is arranged on the left of the valve body, and an air inlet pipe fitting is arranged on the right end of the valve body; the cylinder is divided into a left side high pressure chamber and a right side low pressure chamber, wherein the high pressure chamber communicates with an air inlet through the high pressure chamber inlet passage, and the low pressure chamber directly communicates with an air outlet; a high pressure chamber air inlet adjustable bolt is arranged in the high pressure chamber inlet passage; a pretension adjustable bolt is arranged in the cylinder sealing nut; a pretension spring is arranged in the location slot at the lower part of the pretension adjustable bolt. The opening of the expanding valve is controlled by the condensing pressure and the evaporating pressure of the refrigerating system, the manometrical change of the high and low pressure sides make the cylinder piston in the cylinder move left and right with the valve rod and the spherical valve head, thereby adjusting the flow area of the expanding valve throat, and changing the superheat degree of the export of the evaporator through adjusting the flux of the refrigerant.

Description

technical field [0001] The invention relates to a throttling mechanism of a refrigerating system, in particular to an R410A refrigerating system self-adaptive regulating expansion valve, which belongs to the technical field of refrigerating. Background technique [0002] With the gradual introduction and implementation of domestic and foreign environmental protection laws and regulations, the traditional Freon refrigerant R22 used in household air conditioners is being rapidly replaced by the new environmentally friendly refrigerant R410A. In addition to its environmental protection advantages, R410A has a major feature of high pressure. In the R410A refrigeration system, the operating pressure of the high pressure side can reach up to 4.6MPa, which is 2 to 4 times higher than the pressure of other commonly used refrigerants. This makes the R410A refrigeration system use The expansion valve can be controlled and adjusted by the system's own differential pressure drive. [0...

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Problems solved by technology

[0005] So far, there has not been an expansion valve suitable for the R410A system, which is completely driven by the system pressure difference and does not require additional power supply or temperature-sensitive power head drive.

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