Electrically operated valve
An electrically operated valve is provided with a valve main body in which a valve chamber is defined in an inner portion and a first opening and a second opening are formed in a side portion and a bottom portion, a valve seat member which has an valve port open to the valve chamber and a valve seat and is provided in the second opening of the valve main body, a valve body which is arranged in the valve chamber so as to be movable up and down, and an elevation drive portion which moves up and down the valve body in relation to the valve seat, and a porous body 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. Accordingly, an abnormal noise can be reduced.
1. An electrically operated valve comprising:
a valve main body with a tubular base body in which a valve chamber is defined in an inner portion and a first opening and a second opening are formed in a side portion and a bottom portion, respectively;
a valve seat member which has a valve port open to said valve chamber and a valve seat and is provided in said second opening of said valve main body;
an axially symmetric valve body which is arranged in said valve chamber so as to be movable up and down; and
an elevation drive portion which moves up and down said valve body in relation to said valve seat,
wherein a porous body is arranged along a portion which is positioned in a side portion of said valve port along an inner wall surface of said valve main body, and
wherein said porous body is formed into a C-shaped cross section arranged coaxially to the tubular base body of the valve main body and to the valve body, wherein the porous body is cut out in a portion between ends of the C-shaped cross section to form an opening between the ends of the C-shaped cross section in a way such that a fluid is able to pass through the opening so as to not inhibit flow of the fluid between said side portion and the valve port, and
wherein the opening of the porous body faces said first opening over a whole in an elevating direction of said valve body to provide said C-shaped cross section defined by a section plane orthogonal to the elevating direction of the valve body.
2. The electrically operated valve according to claim 1 , wherein a portion in an opposite side to said first opening protrudes toward said valve port side.
3. The electrically operated valve according to claim 1 , wherein said porous body is formed into a wavy shape in a peripheral direction.
4. The electrically operated valve according to claim 1 , wherein said porous body is constructed by at least one of a foam member, a mesh member obtained by weaving a wire rod like mesh, a laminated body obtained by laminating a plurality of said mesh members, and a plate-like member in which a plurality of openings are formed.
5. The electrically operated valve according to claim 1 , wherein an upper portion of said porous body is fitted to a concave fitting portion of the tubular base body and a lower end portion is inserted between an outer peripheral surface of the valve seat member and an inner wall surface of the tubular base body.
6. The electrically operated valve according to claim 1 , wherein the electrically operated valve is configured as a two-direction distribution electrically operated valve having a flow path in which a fluid is able to flow in two directions.
7. An electrically operated valve comprising:
a valve main body with a tubular base body in which a valve chamber is defined in an inner portion and a first opening and a second opening are formed in a side portion and a bottom portion, respectively;
a valve seat member which has a valve port open to said valve chamber and a valve seat and is provided in said second opening of said valve main body;
an axially symmetric valve body which is arranged in said valve chamber so as to be movable up and down; and
an elevation drive portion which moves up and down said valve body in relation to said valve seat,
wherein a porous body is arranged along a portion which is positioned in a side portion of said valve port along an inner wall surface of said valve main body, and
wherein said porous body is formed into a C-shaped cross section arranged coaxially to the tubular base body of the valve main body and to the valve body, wherein a space is cut out in a portion of the porous body between ends of the C-shaped cross section to form an opening through which a fluid passes in a way such that the opening does not inhibit flow of the fluid between said side portion and the valve port, and
wherein the space of the porous body faces said first opening over a whole in an elevating direction of said valve body to provide said C-shaped cross section defined by a section plane orthogonal to the elevating direction of the valve body.