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Expansion valve

An expansion valve and valve core technology, applied in the field of expansion valves, can solve the problems of low flow control accuracy of the expansion valve, and achieve the effects of high flow control accuracy and small flow change.

Pending Publication Date: 2018-04-13
WENLING HENGFA AIRCONDITION COMPONENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned problems in the existing technology, and propose an expansion valve, which is used to solve the problem of low flow control accuracy of the existing expansion valve

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0052] Such as figure 1 As shown, a two-way expansion valve includes a tubular valve body 1. A valve core 1 2 and a valve core 2 3 are slid inside the valve body 1. There are through holes 51 along the axial direction on the columns 5, and there are limit steps on the outer peripheral wall of the limit column 5. The spool one 2 and the spool two 3 are all located between the two limit columns 5, and the spool one 2 and A spring one 6 is arranged between a limit post 5, and one end of the spring one 6 leans against the spool one 2, and the other end leans against the limit step of the limit post 5, and the spool two 3 and the other limit A spring 2 7 is arranged between the position posts 5 , and one end of the spring 2 7 leans against the valve core 2 3 , and the other end leans against the limit step of another limit post 5 . combine figure 2 As shown, the spool one 2 has a through orifice 21 along the axial direction, the spool two 3 is columnar, and there is a columnar p...

Embodiment 2

[0056] The structure of the expansion valve is basically the same as that of Embodiment 1, the difference is that Figure 9 , Figure 10 As shown, there are three throttling walls 321, three straight cylindrical surfaces 22, and the throttling part 32 extending to the end surface of the valve core 23 has two throttling walls 321, and the two throttling walls 321 are conical surfaces, and One end with a larger diameter of one throttling wall 321 is connected to the other end with a smaller diameter of the other throttling wall 321, and among the two conical throttling walls 321, the end of the throttling wall 321 near the end surface of the valve core 23 The taper is smaller than that of the other throttling wall 321 , and when the first valve core 2 and the second valve core 3 abut against each other, the two conical throttling walls 321 are opposite to the straight cylindrical surface 22 with the largest diameter.

[0057] When the passage of refrigerant is small or does not...

Embodiment 3

[0059] The structure of the expansion valve is basically the same as that of Embodiment 1, the difference is that Figure 16 , Figure 17 As shown, there are four throttling walls 321, there are two straight cylindrical surfaces 22, and the throttling part 32 extending to the end surface of the valve core 23 has two throttling walls 321, and the two throttling walls 321 are conical surfaces. , and one end of a throttling wall 321 with a larger diameter is connected to the other end of a throttling wall 321 with a smaller diameter, and among the two conical throttling walls 321, the throttling wall near the end surface of the valve core 23 The taper of 321 is smaller than that of the other throttling wall 321, and the other two throttling walls 321 are cylindrical surfaces. The largest straight cylindrical surface 22 is opposite, and the cylindrical throttle wall 321 with a larger diameter is opposite to the smaller diameter straight cylindrical surface 22. The cylindrical thr...

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Abstract

The invention provides an expansion valve, belongs to the technical field of valves and solves the problem of low control accuracy of the existing expansion valve. The expansion valve comprises a valve element I and a cylindrical valve element II, wherein the valve element I is provided with a run-through throttling hole; a cylinder insertion head which can be inserted into the throttling hole isarranged on the end surface of the valve element II; the outer diameter of the insertion head is smaller than that of the valve element II; at least two straight cylinder surfaces with different diameters are arranged on the inner wall of the throttling hole from the hole opening to the inside; at least two ring-shaped throttling walls with different diameters are arranged on the outer wall of theinsertion head; when the insertion head is inserted into the throttling hole, the throttling walls are opposite to the straight cylinder surfaces and form throttling channels. The expansion valve ishigher in flow control accuracy.

Description

technical field [0001] The invention belongs to the technical field of valves and relates to an expansion valve. Background technique [0002] The compressor, condenser, expansion valve, and evaporator constitute the refrigeration system. The expansion valve is an important part of the refrigeration system. It is generally installed between the condenser and the evaporator. The expansion valve can make the evaporator evaporate The gas is pressurized by the compressor and liquefied to a high-temperature and high-pressure liquid refrigerant, and throttled by its orifice to become a low-temperature and low-pressure mist liquid refrigerant. Then the refrigerant absorbs heat in the evaporator to achieve cooling effect, and the expansion valve passes through The change of the superheat at the end of the evaporator is used to control the flow rate of the valve to prevent the occurrence of liquid impact caused by inhalation of the refrigerant into the compressor due to insufficient ...

Claims

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Application Information

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IPC IPC(8): F25B41/06F25B41/31
CPCF25B41/34F25B41/31Y02B30/70
Inventor 金耿阮义兵
Owner WENLING HENGFA AIRCONDITION COMPONENTS
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