CN201513598U

CN201513598U - Two-position three-way electromagnetic valve

Info

Publication number: CN201513598U
Application number: CN2009202088613U
Authority: CN
Inventors: 杨又初; 汪昌东
Original assignee: Shanghai Fengshen Refrigeration Controls Co Ltd
Current assignee: Shanghai Shen refrigeration controller Limited by Share Ltd
Priority date: 2009-09-17
Filing date: 2009-09-17
Publication date: 2010-06-23
Anticipated expiration: 2019-09-17

Abstract

The utility model discloses a two-position three-way electromagnetic valve which comprises a valve body, a bushing seat matched with the upper part of the valve body, a bushing fixed in the center hole of the bushing seat, and a coil component fixed outside the bushing, wherein the upper side of the interior of the bushing is fixed with a static core iron and the lower side thereof is movably matched with a movable core iron; the lower part of the static core iron is fixed with a return spring which passes through the movable core iron to be matched with a valve port cushion; the valve body is provided with an inlet, a public port and an outlet; the inlet and the public port are communicated through a pipe and a first valve port is arranged between the inlet and the public port; the public port and the outlet are communicated through a pipe and a second valve port is arranged between the public port and the outlet; the first valve port is provided with a valve core which is matched with a valve core spring; the upper part of the valve core is connected with a valve rod; the upper part of the valve rod is connected with the movable core iron; and the valve port cushion is arranged on the second valve port. The two-position three-way electromagnetic valve has the benefits of simple structure, capability of being produced at home, and lower cost.

Description

A kind of two-position three way magnetic valve

Technical field

The utility model relates to refrigeration and air-conditioning technical field, is mainly a kind of two-position three way magnetic valve that is used for refrigeration compressor load Unloading Control.

Background technique

Refrigeration compressor producer uses the two-bit triplet solenoid valve with following structure mostly at present: this solenoid valve comprises valve body 800, valve body is provided with import A, common port B and outlet C, be provided with import valve seat 801 between the pipeline of import A and common port B in the valve body 800, cooperate inlet spool 802 on the import valve seat, be provided with outlet valve seat 803 between the pipeline of import common port B and outlet C in the valve body, cooperate outlet spool 804 on the outlet valve seat, the valve body top is combined with sleeve pipe 805, sleeve pipe top is fixed with quiet core iron 806, quiet core iron bottom is provided with Returnning spring 807, this Returnning spring matches with a moving core iron 808, to such an extent as to when energising, quiet core iron and moving core iron adsorb mutually, and during outage, moving core iron resets under the promotion of Returnning spring.This has two plectrums the bottom of moving core iron, match respectively at inlet spool 802 and outlet spool 804, under the effect of plectrum, inlet spool and outlet spool are joined and are not opened, thereby the UNICOM that realizes import A and common port B carries out fluid injection, and common port B unloads with the UNICOM that exports C.

Yet there are three shortcomings in this valve: at first owing to only depend on the end of moving core iron to cooperate rate of fault height during Unloading Control with spool; Next valve core structure complexity, cost is higher.

Summary of the invention

The utility model structure mainly addresses the above problem, and a kind of reliability height is provided, and the low two-bit triplet solenoid valve of cost.

For achieving the above object, the utility model provides a kind of two-bit triplet solenoid valve, it comprise valve body, with the casing seat that matches in valve body top, be fixed in the sleeve pipe in the casing seat center hole, and be fixed on the outer coil block of sleeve pipe;

The inside pipe casing upside is fixed with quiet core iron, the downside activity be combined with moving core iron, the bottom of quiet core iron is fixed with Returnning spring, this Returnning spring passes moving core iron and matches with a valve port cushion;

Valve body is provided with import, common port and outlet, import and common port communicate by pipeline and between be provided with first valve port, common port and the outlet by pipeline communicate and between be provided with second valve port, the first valve port place is provided with a spool, this spool matches with a valve core spring, and spool top connects a valve rod, and valve rod top connects moving core iron;

The valve port cushion is arranged on second valve port.

Preferably, moving core iron bottom is provided with recess, and described valve port cushion to small part is arranged in this recess.

Preferably, be step hole at first valve port, the spool correspondence is arranged on the position of this step hole, and valve core spring is arranged on this step hole bottom and matches with the bottom surface of spool.

Preferably, the valve body top is provided with circular groove, and this circular groove communicates with the pipeline of common port, has sharp mouth shape projection to form second valve port in the middle of the circular groove, and this point mouth shape projection is positioned at the below of valve port cushion and communicates with outlet.

The operating principle and the process of two-position three way magnetic valve of the present utility model are as follows: when the electromagnetic coil of solenoid valve cuts off the power supply, quiet core iron does not have suction, Returnning spring is in compressive state, Returnning spring power enough will be moved core iron and push away downwards, the valve port cushion is closed second valve port, and overcome valve core spring simultaneously and try hard to recommend movable valve plug, first valve port is opened, second valve port is in closed condition, and first valve port is in open mode; When electromagnetic coil is switched on, electromagnetic coil suction overcomes Returnning spring power, to move core iron and upwards inhale, and make the valve port cushion leave second valve port, simultaneously, because moving core iron electromagnetic coil suction moves up, the valve core spring that is in compressive state is tried hard to recommend movable valve plug, first valve port is closed, at this moment, first valve port is in closed condition, and second valve port is in open mode.

The beneficial effects of the utility model are, adopt the valve port cushion, so rate of fault is low during Unloading Control, the reliability height, and experiment shows in 0.7Mpa air pressure difference situation lower valve port leakage rate less than 200ml; This product structure is simple in addition, can produce at home, and cost is lower.

Description of drawings

Fig. 1 is the structural representation of two-position three way magnetic valve of the prior art.

Fig. 2 is the structure sectional view according to two position three-way valve of the present utility model.

Fig. 3 is in the schematic representation of first working state for expression two position three-way valve of the present utility model.

Fig. 4 is in the schematic representation of second working state for expression two position three-way valve of the present utility model.

Embodiment

The utility model relates to a kind of novel two-position three way magnetic valve, switches in order to realize the liquid road between import, common port and outlet.

With reference to Fig. 2, two-bit triplet solenoid valve 100 according to a kind of embodiment of the present utility model, it comprise valve body 10, with the casing seat 20 that matches in valve body 10 tops, be fixed in the sleeve pipe 30 in casing seat 20 center holes, and be fixed on the outer coil block 40 of sleeve pipe 30; Sleeve pipe 30 is tubular, and its upper inside is fixed with quiet core iron 31, and core iron 32 is moved in being combined with of downside activity, and the bottom of quiet core iron 31 is fixed with Returnning spring 33, and this Returnning spring 33 passes moving core iron 32 and matches with a valve port cushion 34.Quiet core iron is positioned within the coil block 40, like this, when coil block 40 when electric, produce the aroused in interest iron 32 of magnetic attraction.

Valve body 10 is provided with import A, common port B and outlet C, import A and common port B communicate by pipeline and between be provided with the first valve port AB, common port B and the outlet C communicate by pipeline and between be provided with the second valve port BC, the first valve port AB place is provided with a spool 11, this spool 11 matches with a valve core spring 13, and spool 11 tops connect a valve rod 12, and valve rod top connects moving core iron 32; The first valve port AB can be a step hole, and spool 11 correspondences are arranged on the position of this step hole, and it has the part of tapering can seal or remove the step part of step hole, and valve core spring 13 is arranged on this step hole bottom and matches with the bottom surface of spool 11.

Moving core iron 32 bottoms can be provided with recess, described valve port cushion 34 all or part of being arranged in this recess, the valve port cushion is arranged on second valve port top, valve body 10 tops are provided with circular groove 15, this circular groove 15 communicates with the pipeline of common port B, have sharp mouth shape 16 projections to form the second valve port BC in the middle of the circular groove, this point mouth shape projection 16 is positioned at the below of valve port cushion and communicates with outlet C.Like this, moving up and down of valve port cushion can be realized closing and opening the second valve port BC.

The utility model can be used for a kind of refrigeration compressor cylinder body, when compressor operating just often, electromagnetic coil of the present utility model is in off-position, the valve port between import and the common port is opened, the BC valve port is closed, carry out normal feed flow work this moment; When the compressor operating load was excessive, with electromagnetic coil "on" position of the present utility model, the AB valve port was closed by other controller (as pressure switch), and the BC valve port is opened and closed, and carried out unloaded operation this moment;

Two-bit triplet solenoid valve of the present utility model can also be used for a kind of testing apparatus, by the utility model compression cylinder is carried out tonifying Qi or venting, reaches the action that promotes cylinder push-rod.

When the electromagnetic coil assembly 40 of solenoid valve cuts off the power supply, quiet core iron 31 does not have suction, and Returnning spring 33 is in compressive state, and the elastic force of Returnning spring 33 enough will move core iron 32 and push away downwards, valve port cushion 34 is closed the second valve port BC, and overcome valve core spring power 13 promotion spools 11 simultaneously, the first valve port AB is opened, as shown in Figure 3, second valve port is in closed condition, first valve port is in open mode, and solenoid valve is in first state, and flow of fluid is shown in arrow among the figure; When electromagnetic coil assembly 40 energisings, electromagnetic coil suction overcomes Returnning spring power, will move core iron 32 and upwards inhale, make valve port cushion 34 leave the second valve port BC, simultaneously, because moving core iron 32 electromagnetic coil suction move up, the elastic force that is in the valve core spring 13 of compressive state promotes spool 11, the first valve port AB is closed, at this moment, first valve port is in closed condition, and second valve port is in open mode, solenoid valve is in second state, and media flow is shown in arrow among Fig. 4.

Claims

1. two-bit triplet solenoid valve is characterized in that: comprise valve body, with the casing seat that matches in valve body top, be fixed in the sleeve pipe in the casing seat center hole, and be fixed on the outer coil block of sleeve pipe;

Valve body is provided with import, common port and outlet, import and common port communicate by pipeline and between be provided with first valve port, common port and the outlet by pipeline communicate and between be provided with second valve port, the first valve port place is provided with a spool, this spool matches with a valve core spring, and spool top connects a valve rod, and valve rod top connects moving core iron; And the valve port cushion is arranged on second valve port.

2. two-bit triplet solenoid valve according to claim 1 is characterized in that: at first valve port is step hole, and the spool correspondence is arranged on the position of this step hole, and valve core spring is arranged on this step hole bottom and matches with the bottom surface of spool.

3. two-bit triplet solenoid valve according to claim 1 and 2, it is characterized in that: the valve body top is provided with circular groove, this circular groove communicates with the pipeline of common port, has sharp mouth shape projection to form second valve port in the middle of the circular groove, and this point mouth shape projection is positioned at the below of valve port cushion and communicates with outlet.

4. two-bit triplet solenoid valve according to claim 3 is characterized in that: moving core iron bottom is provided with recess, and described valve port cushion to small part is arranged in this recess.