JP2007016958A - Motor-operated valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce refrigerant passing sound in a motor-operated valve for controlling the flow of a refrigerant. <P>SOLUTION: A valve body 10 of the motor-operated valve 1 has an orifice 12, a valve chamber 14 and a refrigerant passage 16. An output shaft 60 of a motor unit 50 turns a driver 62, and a screw shaft 64 moves in an axial direction. A valve stem 80 allows a valve element 82 to contact and separate from the orifice 12. Flow straightening members 100 are provided between piping 20, 22 and the valve chamber 14. The flow straightening member 100 has a plurality of flow straightening holes with small diameters to prevent large bubbles from flowing into the valve chamber while subdividing bubbles. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motor-operated valve that is disposed in a refrigeration cycle and controls the flow rate of a refrigerant.

In the electric valve that controls the flow rate of the refrigerant, a flow noise is generated when the refrigerant passes through the valve chamber.
The following patent document discloses a motor-operated valve that reduces this flow noise.
JP 2005-3336 A

In the refrigerant flowing into the valve chamber equipped with the valve body, a state occurs in which the gas-phase refrigerant is mixed in the liquid-phase refrigerant as foam.
When this foam grows into large bubbles, a collision sound is generated when passing through the valve chamber, causing noise.
An object of the present invention is to provide a motor-operated valve that reduces noise generated by bubbles.

  In order to achieve the above object, an electric valve of the present invention includes a valve body having an orifice formed in the axial direction of the valve chamber and the valve chamber, a valve body disposed in the valve chamber, and the valve body as an orifice. Electric means that are separated from and connected to each other, a refrigerant passage provided in a direction orthogonal to the axis of the valve chamber, a pair of pipes communicating with the refrigerant path and the orifice, and between the pair of pipes and the valve body A refrigerant flow straightening member is provided.

  The rectifying member includes a first rectifying hole arranged in the center and a plurality of second rectifying holes arranged around the first rectifying hole, and the diameter dimension of the second rectifying hole is It has a size smaller than the diameter size of one straightening hole.

  By providing the above means, the present invention can reduce a collision sound generated by large bubbles in the refrigerant flowing into the valve chamber.

FIG. 1 is an explanatory diagram showing the overall configuration of the motor-operated valve of the present invention.
The motor-operated valve indicated as a whole by reference numeral 1 has a valve body 10 made of brass or the like. The valve body 10 includes a valve chamber 14 into which the valve body is inserted, an orifice 12, and a refrigerant passage 16 provided in a direction perpendicular to the axis of the valve chamber. 22 is fixed.

A bearing 52 of a motor unit 50 is attached to the valve body 10 via a nut member 30.
The motor unit 50 includes a motor 54 and a speed reduction device 56, and the reduced output is transmitted to the driver 62 via the output shaft 60.

  A screw shaft 64 is screwed into the central portion of the bearing 52, and the screw shaft 64 is rotationally driven by the driver 62 to move in the axial direction. The movement of the screw shaft 64 is transmitted to the valve shaft 80 via the ball 70 and the receiving member 72. A valve body 82 is attached to the tip of the valve shaft 80, and the flow rate of the refrigerant passing therethrough is controlled by the lift amount from the orifice 12.

  A bellows 92 is disposed on the outer peripheral portion of the valve shaft 80 and is fixed to the valve body 10 by a ring member 90. The bellows 92 seals between the valve chamber 14 side and the motor unit 50.

2A and 2B show details of the valve body 10 and the internal structure thereof. FIG. 2A is a sectional view, FIG. 2B is a left side view of FIG. 2A, and FIG.
A refrigerant passage 16 is provided between the first pipe 20 and the valve chamber 14. A refrigerant flow regulating member 100 is inserted into the refrigerant passage.
Similarly, the refrigerant rectifying member 100 is inserted facing the orifice 12 to which the second pipe 22 is fixed.

FIG. 3 shows details of the rectifying member 100.
The flow regulating member 100 is a cup-shaped member and has a mounting flange 102. The rectifying member 100 is fixed to the opening of the valve body 10 by pressing the flange 102 with the pipes 20 and 22.
The rectifying member 100 has a plurality of rectifying holes for rectifying the refrigerant flowing into and out of the valve chamber 14. The rectifying hole is configured by a first rectifying hole 110 provided at the center and a plurality of second rectifying holes 120 arranged around the first rectifying hole 110.
The rectifying member 100 can also be manufactured by pressing using a punching plate as a material.

The refrigerant that is about to flow into the valve chamber 14 from the first pipe 20 or the second pipe 22 is rectified while passing through the rectifying member 100.
By this action, the passing sound of the refrigerant passing through the valve chamber is reduced.
Further, the diameter dimensions of the rectifying holes 110 and 120 are set to be smaller than the diameter dimension of the refrigerant passage formed in the valve body 10.
Further, the diameter dimension of the second rectifying hole 120 is set smaller than the diameter dimension of the first rectifying hole 110.

Therefore, large bubbles among the bubbles mixed in the refrigerant cannot pass through the rectifying hole, and noise generated when the large bubbles flow into the valve chamber is prevented.
Further, the rectifying hole has a function of subdividing large bubbles. By this action, the bubbles are subdivided and contribute to the reduction of refrigerant passing sound.

Explanatory drawing which shows the whole structure of the motor operated valve of this invention. Explanatory drawing of a valve main body. Explanatory drawing of a baffle member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motorized valve 10 Valve main body 12 Orifice 14 Valve chamber 16 Refrigerant passage 20,22 Piping 50 Motor unit 62 Driver 64 Screw shaft 80 Valve shaft 82 Valve body 100 Rectification member

Claims (3)

A valve body having an orifice formed in the axial direction of the valve chamber and the valve chamber, a valve body disposed in the valve chamber, electric means for separating and contacting the valve body with respect to the orifice, and orthogonal to the axis of the valve chamber An electrically operated valve comprising a refrigerant passage provided in a direction and a pair of pipes communicated with the refrigerant passage and the orifice,
A motor-operated valve comprising a refrigerant rectifying member disposed between a pair of pipes and a valve body.   The motor-driven valve according to claim 1, wherein the rectifying member includes a first rectifying hole disposed in the center and a plurality of second rectifying holes disposed around the first rectifying hole. The motor-operated valve according to claim 2, wherein a diameter dimension of the second rectifying hole is smaller than a diameter dimension of the first rectifying hole.

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