Electrically operated valve

Abstract

The invention provides an electrically operated valve which can reduce an abnormal noise generated in the case that a fluid is flows in a first flowing direction and a second flowing direction, while suppressing a flow rate loss of a fluid with a simple structure. An electrically operated valve is provided with a valve main body (5) in which a valve chamber (7) is defined in an inner portion and a first opening (11a) and a second opening (12a) are formed in a side portion and a bottom portion, a valve seat member (8) which has an valve port (9) open to the valve chamber (7) and a valve seat (8a) and is provided in the second opening (12a) of the valve main body (5), a valve body (20) which is arranged in the valve chamber (7) so as to be movable up and down, and an elevation drive portion (50) which moves up and down the valve body (20) in relation to the valve seat (8a), and a porous body (4) constructed by a foam metal is arranged along a portion which is positioned in a side portion of the valve port on the inner wall surface of the valve main body (5).

Description

technical field [0001] The invention relates to an electric valve, in particular to an electric valve used in heat pump cooling and heating systems. Background technique [0002] For a long time, we have continuously developed electric valves for the purpose of miniaturization, increase in capacity and energy saving. As an example of such a conventional electric valve, Patent Document 1 discloses a technique of reducing the force acting in the valve closing direction as much as possible so that a valve opening spring with a smaller spring load can be used. [0003] The electric valve disclosed in Patent Document 1 has: a valve main body having a valve chamber, a first lateral port opening to the valve chamber, a longitudinal valve port with a valve seat opening to the valve chamber, And the second inlet and outlet connected with the valve port; the valve core, the valve core is configured to be liftable in the valve chamber to open and close the valve port; the lifting driv...

AI Technical Summary

Problems solved by technology

[0011] However, in the conventional technology disclosed in Patent Document 2, the refrigerant flowing in from the first pipe flows back into the space formed by the main body and the rectifying member, and flows into the space having the valve body through the plurality of through holes formed in the rectifying member. , and flow to the second pipe through the throttle formed by the valve element and the valve seat, thereby suppressing the vibration of the valve element and the housing caused by the uneven state of the refrigerant and reducing noise However, there are also problems that the flow loss of the refrigerant becomes large, and the arrangement structure of the rectifying member becomes complicated.

[0012] In addition, in the conventional technology disclosed in Patent Document 3, the refrigerant is rectified when it passes through the porous body, and even when it flows into a gas-liquid two-phase flow in which the flow sound of the refrigerant is the most prominent, since the gas-liquid two-phase flow is uniform In this homogenized state, the pressure is decompressed, so the discontinuous sound is reduced and the noise reduction effect is obtained. However, the problem of increasing the flow loss of the refrigerant and the need for the porous body to act as a valve seat role problem

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