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Electric valve

A technology of electric valve and valve port, which is applied in the direction of lifting valve, valve details, valve device, etc., which can solve the problems of noise generation and achieve the effect of reducing noise

Active Publication Date: 2012-05-09
SAGINOMIYA SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even in the electric valve of Patent Document 1, the shape of the valve port is different from the above-mentioned Figure 10 Likewise, the same noise

Method used

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Embodiment Construction

[0028] Next, embodiments of an electric valve according to the present invention will be described with reference to the drawings. figure 1 is a longitudinal sectional view of the electric valve of the first embodiment, figure 2 It is an enlarged vertical cross-sectional view of a main part in the vicinity of a valve seat in the electric valve of the first embodiment, image 3 It is a figure explaining the function of the valve seat part in the electric valve of 1st Embodiment, Figure 4 is a longitudinal sectional view of an electric valve according to a second embodiment, Figure 5 is a longitudinal sectional view of an electric valve according to a third embodiment, Figure 6 It is a figure which shows an example of the air conditioner which used the electric valve which concerns on embodiment. In addition, in the second embodiment and the third embodiment, the same reference numerals are attached to the same and corresponding elements as those of the first embodiment,...

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Abstract

The present invention relates to an electric valve. In the electric valve in which flow of refrigerant is controlled through a needle valve opening / closing valve opening, flowing of the refrigerant at the valve opening is stabilized for reducing noise. A valve seat (1) is provided with a first valve opening (11) which has a circular cross section and has an inner diameter D1 and a second valve opening (12) with an inner diameter D2. D1, D2 and an inner diameter D3 of a secondary joint pipe (42) satisfy a formula: D1<D2<D3. A conical part (13) is provided between the first valve opening and the second valve opening. An angle (alpha1) of an inner surface of the conical part is set in a range of 5 DEG<=alpha1<=30 DEG. The inner surface of the second valve opening is manufactured to a straight cylinder for aiming at the conical part. The flow speed of the refrigerant which passes through the clearance to a needle valve (51) is reduced in the second valve opening before arriving at the secondary joint pipe. Furthermore through setting the straight second valve opening, free shearing surface on the refrigerant at the secondary joint pipe side is restricted, and the flow is stabilized before the refrigerant arrives at the secondary joint pipe.

Description

technical field [0001] The present invention relates to a needle-type electric valve for controlling the flow rate of refrigerant in an air conditioner, and more particularly to an electric valve with an improved seat-to-needle port shape. Background technique [0002] Conventionally, in the refrigerating cycle, the noise accompanying the passage of the fluid generated from the electric valve controlling the flow rate of the refrigerant has often been a problem. As an electric valve for implementing such noise countermeasures, there is, for example, a technology disclosed in JP 2008-232290 A (Patent Document 1). [0003] In addition, as an existing electric valve, there are, for example, Figure 9 Electric valve shown. This electric valve has a valve case 4 forming a valve chamber 4A, a primary joint pipe 41 is attached to a side of the valve case 4, and a secondary joint pipe 42 is attached to one end of the valve chamber 4A in the axis L direction. In addition, a valve s...

Claims

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Application Information

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IPC IPC(8): F16K31/04F16K1/42F16K47/02
Inventor 中川大树中野诚一石黑元康
Owner SAGINOMIYA SEISAKUSHO CO LTD