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Expansion valve

a technology of expansion valve and expansion valve, which is applied in the direction of fluid circulation arrangement, refrigerating machines, lighting and heating apparatus, etc., can solve the problems of abnormal noise and unstable operation achieve the effect of suppressing the vibration of the valve element, reducing the noise of refrigerant passing, and suppressing the deformation of the vibration isolation spring

Inactive Publication Date: 2019-06-13
FUJIKOKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The expansion valve described in this patent helps reduce the noise caused by the movement of the valve and the deformation of the valve's isolation spring. This results in a quieter refrigeration system, improving the overall performance and comfort of the system.

Problems solved by technology

Here, although the high-pressure refrigerant flowing from the inlet port passes through the valve chamber, there are also cases where pressure fluctuation may occur in the high-pressure refrigerant sent to the expansion valve on the upstream side in the refrigerant cycle, and if the pressure fluctuation is transmitted, a problem may occur in that operation of the valve element becomes unstable.
Such pressure fluctuation may cause vibration of the valve element, which leads to the occurrence of abnormal noise.

Method used

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Experimental program
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Effect test

first embodiment

[0028]FIG. 1 is a vertical cross-sectional view illustrating a first embodiment of an expansion valve according to the present invention. FIG. 2 is a vertical cross-sectional view of a relevant portion of an expansion valve according to a first embodiment.

[0029]As illustrated in FIG. 1, the expansion valve 10 includes a valve body 11, a power element 70, a valve element 40, a valve rod 60, an O ring 36, a support member 100, a vibration isolation spring 140, a coil spring 44 and an adjusting screw 120.

[0030]The valve body 11 is made of an aluminum alloy, for example, and can be obtained by subjecting an aluminum alloy or the like to extrusion molding with the X direction of FIG. 1 set as the extrusion direction, and then performing machining. The valve body 11 includes a power element mounting portion 12, which is an internal screw formed on an upper surface portion and engaged with an external screw 72a of the power element 70 to thereby fix the power element 70, an inlet port 20 t...

second embodiment

[0054]FIG. 6 is a plan view illustrating a vibration isolation spring according to a second embodiment. The second embodiment has a configuration in which the vibration isolation spring 140 of the first embodiment is replaced with a vibration isolation spring 240, and since the rest of the configuration is the same as that of the first embodiment, a description of the shared portions is omitted.

[0055]The vibration isolation spring 240 includes a base portion 241 and a leg portion 242. The vibration isolation spring 240 is formed by press-forming a plate member having elasticity, such as stainless steel or an alloy thereof, for example.

[0056]The base portion 241 is an annular plate-like member that forms the upper portion of the vibration isolation spring 240 and includes a mounting hole 141a formed at a center thereof, similar to the first embodiment.

[0057]A plurality of the leg portions 242 extend from an outer circumferential side of the base portion 241 in a direction perpendicul...

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Abstract

An expansion valve is provided with a valve body including an inlet hole through which a refrigerant flows into a valve chamber, and a valve hole through which the refrigerant flows out from the valve chamber; a valve element configured to adjust an amount of the refrigerant flowing through the valve hole; a power element that is mounted to the valve body and configured to drive the valve element through a valve rod; a support member configured to support the valve element; a coil spring configured to press the valve element in a valve-closing direction through the support member; and a vibration isolation spring configured to prevent vibration of the valve element, wherein the vibration isolation spring is provided with an annular base portion disposed between the support member and the coil spring, and a plurality of leg portions that extend radially from the base portion.

Description

TECHNICAL FIELD[0001]The present invention relates to an expansion valve having a built-in temperature sensitive mechanism for use in a refrigerating cycle.BACKGROUND ART[0002]Typically, thermal expansion valves having built-in temperature sensitive mechanisms capable of adjusting the amount of passing refrigerant based on temperature are used in the refrigerating cycles of air conditioners provided in automobiles and the like. A valve body of this type of expansion valve includes an inlet port through which a high-pressure refrigerant is introduced, a valve chamber that communicates with the inlet port, and a valve element driving mechanism referred to as a power element disposed on a top portion of the valve body.[0003]A spherical valve element disposed in the valve chamber is arranged opposing a valve seat of a valve hole formed in the valve chamber. The valve element is supported by a support member disposed in the valve chamber, and the valve element is pushed toward a directio...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B41/06
CPCF25B41/06F25B41/31F25B2341/063F25B2500/12F25B2500/13F25B41/335
Inventor KAMATA, NAOKIOKUTSU, KINYAMOGI, TAKASHIYAMASAKI, KURATOITO, SHIGEKI
Owner FUJIKOKI CORP