CN2713230Y

CN2713230Y - Normally open direct current solenoid valve

Info

Publication number: CN2713230Y
Application number: CN 200420022989
Authority: CN
Inventors: 袁泽; 严卫林
Original assignee: Zhejiang Sanhua Co Ltd
Current assignee: Zhejiang Sanhua Co Ltd
Priority date: 2004-05-19
Filing date: 2004-05-19
Publication date: 2005-07-27
Anticipated expiration: 2014-05-19

Abstract

The utility model relates to a normally open direct current solenoid valve for air conditioner. The present solenoid valve commonly requires connection in parallel with a capillary, which is usually provided with a circuit welding on the solenoid valve to connect the capillary in series in the circuit. The reliability of the solenoid valve is effected by the capillary and the circuit . The utility model comprises a valve body and a coil sheathed on the valve body. The valve body comprises a valve seat, a valve port, and a casing arranged on the valve seat. The upper part of the casing extends into the coil and in the casing a core iron is provided. The utility model is characterized in that the lower part of the core iron connects with a valve handle which is sheathed with an attractor fixed to the internal wall of the casing. The lower part of the valve handle is sheathed with a sealed head which can move up and down with the valve handle. The lower end of the sealed head matches with the caliber of the valve port. Between the valve handle and the sealed head a throttling passage for the coolant flowing across is provided when the solenoid valve is closed. The utility model is provided with the same function of throttling and voltage reduction as the capillary, which increases the reliability of the solenoid valve.

Description

The novel DC electromagnetic valve of often opening

[technical field]

The utility model relates to the solenoid valve of idle call, and what have the throttling buck functionality during specifically a kind of closing often opens DC electromagnetic valve.

[background technique]

DC electromagnetic valve (as Fig. 1) is often opened in existing idle call, mainly form by coil 2 ' and valve body 1 ', valve body 1 ' comprises valve seat 1a ' and places sleeve pipe 5 ' on the valve seat, coil 2 ' inside is stretched on the top of sleeve pipe 5 ', be provided with an end socket 4 ' in the sleeve pipe 5 ', paste mutually with magnet case 3 ' one interior edge face its exterior edge face, be provided with core iron parts in the sleeve pipe 5 ', these core iron parts are by core iron 6 ', sealing head 10 ', spring 8 ', attractor 9 ' is formed, sealing head 10 ' one side is passed the attractor 9 ' and the spring 8 ' of ring-type, stretch into core iron 6 ' inside, be connected as a single entity by riveted joint and core iron 6 ', spring 8 ' is between core iron 6 ' and the attractor 9 '; Be provided with a magnetism resistent ring 7 ' between core iron 6 ' and end socket 4 '; End socket, attractor, core iron adopt soft magnetic material.When coil electricity, the core iron pressure spring moves down, and sealing head is closed valve port 11 ', and solenoid valve is in closed condition; When coil blackout, under the effect of spring force, core iron moves up, and sealing head breaks away from valve port, and solenoid valve is in opening state.This solenoid valve generally all needs and capillary paralleling in use, and when solenoid valve is in opening state (as Fig. 2), refrigerant mainly circulates through solenoid valve; When closed electromagnetic valve (as Fig. 3), refrigerant circulates through capillary tube, makes refrigerant obtain the throttling step-down.And capillary tube and solenoid valve in parallel need be established a pipeline that is welded on the solenoid valve usually, capillary tube is serially connected in this pipeline the manufacture cost height.In addition, the reliability of solenoid valve, stability are subjected to the influence of capillary tube and pipeline thereof.

[model utility content]

The technical assignment of technical problem to be solved in the utility model and proposition is the defective that overcomes above-mentioned prior art, provide a kind of have a throttling buck functionality often open DC electromagnetic valve, the throttling passage that its refrigerant when offering a closed electromagnetic valve on solenoid valve is flowed through, do not need parallel capillary tube again, to reduce the reliability of manufacture cost and raising solenoid valve.

The technological scheme that the utility model adopted is such: the novel DC electromagnetic valve of often opening, comprise valve body and the coil that is enclosed within on the valve body, valve body comprises valve seat, valve port and the sleeve pipe that places on the valve seat, coil inside is stretched on the top of sleeve pipe, core iron is arranged in the sleeve pipe, the bottom that it is characterized in that core iron connects a valve rod, be with an attractor that is fixed on the internal surface of sleeve pipe on the valve rod, the bottom of valve rod is with one with on it, mobile down sealing head, the lower end of sealing head cooperates with the bore of valve port, the throttling passage that refrigerant is flowed through when being provided with a closed electromagnetic valve between valve rod and sealing head.The utility model is offered a throttling passage between valve rod and sealing head, make solenoid valve still can keep certain flow down in off position, plays the throttling buck functionality the same with capillary tube, does not need parallel capillary tube again.

The described novel DC electromagnetic valve of often opening, the passage that throttling passage forms for the spacing that is existed by valve rod outer wall and sealing head inwall, spacing is 0.05～0.6mm.

The described novel DC electromagnetic valve of often opening, throttling passage be located at the passage that forms between groove on the valve rod outer wall and sealing head inwall, be located at the passage that forms between groove on the sealing head inwall and valve outer wall or be located at groove on the valve rod outer wall and the groove on the sealing head inwall between the passage that forms, the degree of depth of groove is 0.05～0.6mm, and the shape of groove is in the shape of the letter V, semicircle or rectangle.The throttling passage of this mode of groove is offered in employing, and the circulation path of refrigerant is longer relatively, and the noise when refrigerant flows is low.

The described novel DC electromagnetic valve of often opening, the bottom of valve body is with a valve stem casing, is provided with a step that cooperates with valve stem casing in the sealing head.

The utility model is offered a throttling passage between valve rod and sealing head, make solenoid valve still can keep certain flow down in off position, played the throttling buck functionality the same, reduced the soldering point of refrigeration system with capillary tube, reduce manufacture cost, improved the reliability of solenoid valve.

Below in conjunction with specification drawings and specific embodiments the utility model is further described.

[description of drawings]

Fig. 1 is the existing structural representation of often opening DC electromagnetic valve.

Opening state figure when Fig. 2 is existing solenoid valve and capillary paralleling.

Closed condition figure when Fig. 3 is existing solenoid valve and capillary paralleling.

Fig. 4 is that the utility model embodiment 1 is in the structural representation under the opening state.

Fig. 5 is that the utility model embodiment 1 is in the structural representation under the closed condition.

Fig. 6 is the structural drawing of sealing head among the utility model embodiment 1.

Fig. 7 is the plan view of Fig. 6.

Fig. 8 is that the utility model embodiment 2 is in the structural representation under the closed condition.

Fig. 9 is the structural drawing of sealing head among the utility model embodiment 2.

[embodiment]

Embodiment 1

Shown in Fig. 4～7, often open DC electromagnetic valve, comprise valve body 1 and the coil 2 that is enclosed within on the valve body, valve body 1 comprises valve seat 1a, valve port 12 and the sleeve pipe 5 that places on the valve seat, coil 2 inside are stretched on the top of sleeve pipe 5, be provided with end socket 4 in the sleeve pipe 5, paste mutually with magnet case 3 inboards end socket 4 ends, there are the core iron parts sleeve pipe 5 inside, these core iron parts are by core iron 6, valve rod 10a, sealing head 10b, spring 8, attractor 9 is formed, the bottom of core iron 6 connects a valve rod 10a, be with the attractor 9 that is fixed on sleeve pipe 5 inwalls on the valve rod 10a, the bottom of valve rod 10a is with one with on it, mobile down sealing head 10b, the lower end of sealing head 10b cooperates with the bore of valve port 12, the throttling passage that refrigerant is flowed through when being provided with a closed electromagnetic valve between valve rod 10a and sealing head 10b, the two ends of valve rod 10a combine as a whole by riveted joint and core iron 6.Spring 8 is between core iron 6 and the attractor 9, and attractor 9 is between spring 8 and the sealing head 10b; Be provided with magnetism resistent ring 7 between core iron 6 and the end socket 4; End socket 4, core iron 6, attractor 9 adopt soft magnetic material to make.Be located at and form above-mentioned throttling passage between groove 15 on the sealing head 10b inwall and valve body 1 outer wall, the degree of depth of groove 15 is 0.15mm, and the shape of groove is in the shape of the letter V, and has 4, is circumference uniform distribution, sees Fig. 7.The bottom of valve body 1 is with a valve stem casing 14, is provided with a step 16 that cooperates with valve stem casing 14 in the sealing head 10b.

When coil blackout, under the effect of spring force, core iron moves upward, and valve rod breaks away from sealing head, sealing head breaks away from valve port, and valve body is in opening state, and the flow path of refrigerant is seen the curve of band arrow among Fig. 4.

When coil electricity, the core iron pressure spring moves downward, and valve rod is closed on the sealing head, valve port is closed in the sealing head lower end, and solenoid valve is in closed condition; The refrigerant throttling passage between valve rod and sealing head of flowing through, the flow path of refrigerant are seen the curve of band arrow among Fig. 5, and this passage has increased the circulation path of refrigerant, has reduced refrigerant flow noise.

Embodiment 2

Shown in Fig. 8～9, be with embodiment 1 difference: described throttling passage is formed by the spacing that valve rod outer wall and sealing head inwall exist, and spacing is 0.2mm.During closed electromagnetic valve, the flow path of refrigerant is seen the curve of band arrow among Fig. 8.

Claims

1, the novel DC electromagnetic valve of often opening, comprise valve body (1) and be enclosed within coil (2) on the valve body, valve body (1) comprises valve seat (1a), valve port (12) and place sleeve pipe (5) on the valve seat, coil (2) inside is stretched on the top of sleeve pipe (5), core iron (6) is arranged in the sleeve pipe (5), the bottom that it is characterized in that core iron (6) connects a valve rod (10a), be with an attractor (9) that is fixed on sleeve pipe (5) inwall on the valve rod (10a), the bottom of valve rod (10a) is with one with on it, mobile down sealing head (10b), the lower end of sealing head (10b) cooperates with the bore of valve port (12), the throttling passage that refrigerant is flowed through when being provided with a closed electromagnetic valve between valve rod (10a) and sealing head (10b).

2, the novel DC electromagnetic valve of often opening according to claim 1 is characterized in that the passage that described throttling passage forms for the spacing that is existed by valve rod (10a) outer wall and sealing head (10b) inwall, and spacing is 0.05～0.6mm.

3, the novel DC electromagnetic valve of often opening according to claim 1, it is characterized in that described throttling passage be located at the passage that forms between groove on the valve rod outer wall and sealing head inwall, be located at the passage that forms between groove (15) on the sealing head inwall and valve outer wall or be located at groove on the valve rod outer wall and the groove on the sealing head inwall between the passage that forms, the degree of depth of groove is 0.05～0.6mm, and the shape of groove is in the shape of the letter V, semicircle or rectangle.

4, according to claim 2 or the 3 described novel DC electromagnetic valve of often opening, it is characterized in that valve body (10a) bottom is with a valve stem casing (14), establish a step (16) that cooperates with valve stem casing (14) in the sealing head (10b).