CN201351758Y

CN201351758Y - Bistable electromagnetic valve

Info

Publication number: CN201351758Y
Application number: CNU2008201844125U
Authority: CN
Inventors: 梁原忠
Original assignee: Zhejiang Sanhua Refrigeration Group Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-11-25
Anticipated expiration: 2018-12-26

Abstract

The utility model relates to a bistable electromagnetic valve, which comprises an excitation coil and a valve part, wherein the valve part is sheathed with the excitation coil, and a core iron part which can move axially is arranged in the valve part. The valve part comprises a large bushing and valve seats arranged at both ends, a small bushing coaxially configured with the large bushing is arranged in the large bushing, the core iron part can reciprocate in the small bushing, a permanent magnet is arranged between the large bushing and the small bushing, a fixed part is arranged respectively between both ends of the permanent magnet and the valve seats at the two ends, and one fixed part between the permanent magnet and the valve seat at one end is a spring. The utility model overcomes the problem of the prior art that heat generated when the valve seats and the large bushing are welded and fixed easily damages a fixed block close to the welding end of the valve seat to affect the reliability of the bistable electromagnetic valve, and the defect that the permanent magnet needing to be fixed is easily damaged because the pressing force of the fixed block is hard to control, and has the advantages of reducing damage possibility during work and improving the stability of the bistable electromagnetic valve.

Description

A kind of bistable electromagnetic valve

Technical field

The utility model relates to a kind of bistable electromagnetic valve, the bistable electromagnetic valve of the control refrigeration agent circulation path in especially a kind of refrigeration system, a kind of bistable state two-position three way magnetic valve of using as refrigerator.

Background technique

A kind of two-position three way magnetic valve of using with refrigerator describes below.Fig. 1 is the bistable state two-position three way magnetic valve structural representation of prior art.The bistable state two-position three way magnetic valve mainly is made up of field coil and valve body parts, and field coil is sleeved on the valve body parts excircle, and valve body parts comprises diplopore valve seat 1 and welding outer pipe 9, inlet tube 10 thereon; One end of big sleeve pipe 6 is welded on the diplopore valve seat 1, the port of the other end is connected with single hole valve seat 7, and single hole valve seat 7 is provided with step through-hole, and is welded with outer pipe 8 in the outlet port, small casing 3 is connected with the inboard of diplopore valve seat, is provided with permanent magnet between small casing 3 and the big sleeve pipe 6; Form cavity between diplopore valve seat 1, small casing 3 and the single hole valve seat 7, be provided with the core iron parts 4 that can horizontally slip in the cavity, the magnetic field that permanent magnet produces makes core iron parts 4 and a valve seat valve port of adhesive reach effective adhesive and maintenance, realizes " not having electric self-locking ".When needs change refrigerant flow direction, pass to instantaneous reverse impulse electric current to field coil, field coil is produced in valve pocket with permanent magnet make the reverse pulsed magnet field of mangetic core assembly polar flux, the actuating valve core assembly moves to opposite side, reach effective applying with the valve seat valve port of opposite side, magnetic flux and valve seat that the magnetic field diminishes of field coil, mangetic core assembly then rely on the permanent magnet of valve pocket both sides to produce keep stable state, realize the commutation of refrigeration agent circulation path.

The bistable electromagnetic valve of above structure in small casing 3 and big sleeve pipe 6 formed annular spaces, is provided with fixed block 2 at the two ends of permanent magnet, thereby permanent magnet is fixed.But this structure is owing to when single hole valve seat 7 welds fixedly with big sleeve pipe 6, and the heat that is produced makes fixed block 2 heat damage near single hole valve seat 7 one ends easily, thereby influences the reliability of bistable electromagnetic valve; And because the impacting force of fixed block 2 is difficult for control tightly, causing easily needs fixing permanent magnet to damage.

The model utility content

It is a kind of under existing welding condition that the purpose of this utility model is to provide, part of damage and finish welding not, and do not damage the bistable electromagnetic valve of fixing magnet steel.

For achieving the above object, bistable electromagnetic valve of the present utility model, comprise field coil, valve body parts, field coil is sleeved on the valve body parts outside, but valve body parts inside is provided with the core iron parts of an axial motion, described valve body parts comprises big sleeve pipe and is arranged on the valve seat at two ends, in described big sleeve pipe, have again one with the small casing of big sleeve pipe arranged coaxial, described core iron parts can move back and forth in small casing, permanent magnet is configured between big sleeve pipe and the small casing, and the valve base chamber at permanent magnet two ends and described two ends respectively is equipped with a fixed component; It is characterized in that one of them fixed component between the valve seat at described permanent magnet and described two ends is a spring.

Alternatively, another fixed component is a fixed block.

Preferably, described fixed block is plastic injection-mouldedly to form or adopt non-magnetic materials processings such as brass to form.

Preferably, described permanent magnet is the permanent-magnetic clamp of at least two fan shapes.

Alternatively, the valve seat at a described two ends wherein end is the diplopore valve seat, and the other end is the single hole valve seat.

Because above scheme has adopted spring as fixed component at the end near diplopore valve seat or single hole valve seat, when carrying out the welding of big sleeve pipe and valve seat, can not need to consider the heat damage of part.And make the retention force of permanent magnet controlled easily by elastic force control, reduce the damage possibility in the working procedure, thereby improve the stability of bistable electromagnetic valve spring.It is less relatively that the bistable electromagnetic valve that obtained like this consumes material, easily manufactured and performance is more reliable and more stable.

Description of drawings

Fig. 1 is the sectional view of the bistable electromagnetic valve of prior art;

Fig. 2 be bistable electromagnetic valve shown in Figure 1 A-A to sectional view;

Fig. 3 is a kind of embodiment's of the utility model bistable electromagnetic valve a longitudinal section;

Fig. 4 be among the utility model Fig. 3 embodiment B-B to sectional view;

Fig. 5 is the utility model second embodiment's a longitudinal section.

Embodiment

In order to make those skilled in the art better understand the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.For ease of explanation the utility model difference with the prior art, adopt same numbering to describe for the parts of not doing to change.

First embodiment

Fig. 3 is a kind of embodiment's of the utility model bistable electromagnetic valve a longitudinal section, it is made up of field coil I, valve body parts II, field coil I suit also is fixed on the valve body parts II excircle, valve body parts II constitutes a cylindrical seal body by big sleeve pipe 6 and two ends fixing diplopore valve seat 1, the single hole valve seat 7 of welding, in the cylindrical seal body, with big sleeve pipe 6 arranged coaxial one small casing 3 is arranged, the core iron parts 4 that are provided with in the inner chamber of small casing 3 can axially move back and forth.Be provided with two through holes in the diplopore valve seat 1 and be welded with discharge connection 9 and the entrance sleeve 10 that communicates with these two through holes, and be provided with a valve port with taking over 9 through holes that communicate at inner chamber place, with the intracavity inter-connection of taking over 10 through holes that communicate and small casing 3 with small casing 3; Single hole valve seat 7 is provided with a through hole and is welded with an adapter 8 that is communicated with this through hole.The through hole of single hole valve seat 7 is provided with a valve port at the inner chamber place of small casing 3.

Diplopore valve seat 1, single hole valve seat 7 process for the irony magnetic conductive material, because the bistable electromagnetic valve of illustrated embodiment is mounted in the refrigerator refrigeration system and uses, therefore, adapter 10 reality that diplopore valve seat 1 one ends of its valve body parts II are connected in parallel are for advancing the gas/liquid pipe, take over 9 actual be first to go out the gas/liquid pipe; The adapter 8 that single hole valve seat 7 one ends connect is second to go out the gas/liquid pipe, so that link with the refrigerator pipeline, being connected of diplopore valve seat 1, single hole valve seat 7 and

adapter

9,10,8 can be soldering, also can stablize to keep connecting reliably, to seal with welding such as energy storage weldings.In the present embodiment, diplopore valve seat 1 adopts silver brazing with the welding of taking over 9,10; Single hole valve seat 7 then adopts argon arc welding with the welding of taking over 8.

Big sleeve pipe 6 can be nonmagnetic Stainless Steel Tube, as SUS304 material steel pipe, with diplopore valve seat 1, the 7 usefulness argon arc weldings of single hole valve seat, silver brazing welded seal.In seal, with big sleeve pipe 30 arranged coaxial one small casing 3 is arranged, it is made by non-magnetic material such as Stainless Steel Tube, brass tube, and thickness can be less relatively, core iron parts 4 external cylindrical surfaces and small casing 3 internal diameter Spielpassung.

Core iron parts 4 have two working positions in small casing 3, when core iron parts 4 are near left end as shown in Figure 3, at this moment core iron parts 4 contact with the valve port of diplopore valve seat 1 and seal, and be maintained fixed under the magnetic force of the permanent-magnetic clamp outside small casing 3, at this moment the valve port of diplopore valve seat 1 is blocked and realizes sealing; Core iron parts 4 are moving under the electromagnetic force effect of field coil also near behind the right-hand member, the field coil outage, at this moment core iron parts 4 contact with the valve port of single hole valve seat 7 and seal, and be maintained fixed under the magnetic force of the permanent-magnetic clamp outside small casing 3, at this moment the valve port of single hole valve seat 7 is blocked and realizes sealing.

The working principle of this bistable electromagnetic valve in the refrigerator pipe-line system is such; Under normal circumstances, the magnetic field that permanent magnet produces makes core iron parts 4 and a valve seat valve port of adhesive such as the valve port of single hole valve seat 7 reach effective adhesive and maintenance, taking over 8 turn-offs, the gas/liquid fluid is from taking over 10 by core iron parts 4, the inner chamber of small casing 3 flows out adapter 9 from the valve port of diplopore valve seat 1, when needs change refrigerant flow direction, pass to instantaneous reverse dc pulse current for field coil I, field coil I is produced in small casing 3 with permanent-magnetic clamp make the reverse pulsed magnet field of core iron parts 4 polar fluxs, drive core iron parts 4 along in the small casing 3 radially double-ported valve seat 1 end move, valve port until core iron parts 4 and diplopore valve seat 1 reaches effective applying, field coil I dead electricity magnetic field disappears, magnetic flux and diplopore valve seat 10 that 4 of core iron parts rely on permanent-magnetic clamp to produce keep stable state, realize " not having electric self-locking ", at this moment, adapter 9 valve ports because of diplopore valve seat 1 are blocked sealing and turn-off, the gas/liquid fluid passes through the valve port inflow adapter 8 of the inner chamber and the single hole valve seat 7 of small casing 3 from taking over 10, thereby realizes the commutation of refrigeration agent circulation path.

In the present embodiment, the permanent magnet of configuration is a circular permanent-magnetic clamp between big sleeve pipe 6 and small casing 3, be the fixing lengthwise position of permanent-magnetic clamp on small casing 3, respectively be equipped with a fixed component of making by nonmagnetic substance at permanent-magnetic clamp two ends and

diplopore valve seat

1,7 of single hole valve seats, fixed component near diplopore valve seat 1 one ends is a circular fixed block 2 in the present embodiment, retaining ring 2 processes through injection moulding for nylon material, and its external diameter is slightly larger than the external diameter of permanent-magnetic clamp; Fixed component near single hole valve seat 7 one ends is a spring 5.

When assembling, will be pressed into single hole valve seat 7 again after the assemblings such as fixed block 2, permanent magnet 11, spring 5, make spring 5 compressions, the elastic force that spring 5 compressions are produced makes permanent magnet 11, fixed block 2 stressed fixing.After being pressed into single hole valve seat 7, single hole valve seat 7 welds with big sleeve pipe 6, makes valve inner form the cavity that is hedged off from the outer world.

Second embodiment

Fig. 5 is the utility model second embodiment's a longitudinal section.In the present embodiment, near the fixed component of single hole valve seat 7 one ends be fixed block 2 ', fixed block 2 ' process through injection moulding for nylon material, its external diameter is slightly larger than the external diameter of permanent-magnetic clamp; Near the fixed component of diplopore valve seat one end be spring 5 '.

In when assembling, with fixed block 2 ', permanent magnet 11, spring 5 ' etc. be pressed into diplopore valve seat 1 again after the assembling, make spring 5 ' compression, the elastic force that spring 5 ' compression is produced makes permanent magnet 11, fixed block 2 ' stressed fixing.After being pressed into diplopore valve seat 1, single hole valve seat 7 welds with big sleeve pipe 6, makes valve inner form the cavity that is hedged off from the outer world.

The remaining part of present embodiment is identical with embodiment, does not give unnecessary details one by one at this.

Compared with prior art, bistable electromagnetic valve provided by the invention owing to adopted spring as fixed component at the end near single hole valve seat 7, when carrying out the welding of big sleeve pipe and single hole valve seat, does not need to consider the heat damage of part.And make the retention force of permanent magnet controlled easily by elastic force control, reduce the damage possibility in the working procedure, thereby improve the stability of bistable electromagnetic valve spring.It is less relatively that the bistable electromagnetic valve that obtained like this consumes material, easily manufactured and performance is more reliable and more stable.

The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications; such as the position is set can exchanges or the like of diplopore valve seat and single hole valve seat, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1, a kind of bistable electromagnetic valve, comprise field coil, valve body parts, field coil is sleeved on the valve body parts outside, but valve body parts inside is provided with the core iron parts of an axial motion, described valve body parts comprises big sleeve pipe and is arranged on the valve seat at two ends, in described big sleeve pipe, have again one with the small casing of big sleeve pipe arranged coaxial, described core iron parts can move back and forth in small casing, permanent magnet is configured between big sleeve pipe and the small casing, and the valve base chamber at permanent magnet two ends and described two ends respectively is equipped with a fixed component; It is characterized in that one of them fixed component between the valve seat at described permanent magnet and described two ends is a spring.

2, bistable electromagnetic valve according to claim 1 is characterized in that another fixed component is a fixed block.

3, bistable electromagnetic valve according to claim 2 is characterized in that described fixed block is plastic injection-mouldedly to form or adopt non-magnetic materials processings such as brass to form.

4, bistable electromagnetic valve according to claim 1 is characterized in that described permanent magnet is the permanent-magnetic clamp of at least two fan shapes.

5, according to the described bistable electromagnetic valve of the arbitrary claim of claim 1-4, the valve seat that it is characterized in that a described two ends wherein end is the diplopore valve seat, and the other end is the single hole valve seat.