CN2517929Y

CN2517929Y - Improved double steady-state two-position three-way pulse electromagnetic valve

Info

Publication number: CN2517929Y
Application number: CN 01272794
Authority: CN
Inventors: 谈岳明; 黄富坤; 朱立中; 芮志明
Original assignee: Sitong Plastic Powder Co ltd Y
Current assignee: Sitong Plastic Powder Co ltd Y
Priority date: 2001-12-11
Filing date: 2001-12-11
Publication date: 2002-10-23
Anticipated expiration: 2011-12-11

Abstract

The utility model relates to an improvement for a bistable two-position three-way electromagnetic valve. The utility model has the main improvement that three refrigerant channels are arranged in parallel along a valve pipe, a magnetic latching type valve body which forms the bistability is arranged in the annular hole of an annular excitation line, and a valve seat and a valve core at the both ends of the valve pipe are made from ferromagnetic materials. The utility model not only leads to valve components to be decreased greatly, the structure to be simple, and the volume to be smaller, but also effectively isolates from the magnetoconductive material outside because of arranging the permanent magnet inside, the decaying of the magnetic performance is weaker, and the false action is not caused because of the external magnetic field interference. The valve seat and the valve core adopt the magnetoconductive material, thereby improving the reliability of the closedown hold state and the motion of the valve core, and ensuring the stability and the reliability of the motion of the valve core.

Description

A kind of improved bistable state two-position three way magnetic valve

Technical field

Model utility relates to a kind of improved refrigerator two-position three way magnetic valve, relates in particular to the bistable state two-position three way magnetic valve.

Background technique

Common refrigerator two-position three way magnetic valve, as described in Chinese patent 96208235, its structure is that the extreme and diplopore extreme (general designation valve seat) of single hole is set respectively at non-magnetizer tubular valve body two ends, but and at the spool of the controlled move left and right of two valve base chambers, one circular excitation coil is sheathed on outside the tubular valve body, the move left and right of control spool.The two-position three way magnetic valve constituent elements of this structure (especially valve hole part) is more, not only manufacture cost is big, and volume also expands relatively, especially the spool attracting state is kept the long-term energising that needs by field coil magnetic field is provided, therefore not only use power consumption big, and the long-term energising of field coil is easy to generate electromagnetic noise and coil scaling loss.

For simplifying valve arrangement, reducing the operation power consumption, Chinese patent 00246524 discloses the reciprocating type refrigerator two-position three way magnetic valve of a kind of magnetic freeze mode bistable state.It is at the tubular valve body two ends and the middle part is respectively arranged with three coolant channels that are the setting of T type, and a pair of permanent magnet is set in the tubular valve body both sides, producing magnetic field by permanent magnet causes spool adhesive stable state, valve body and both sides permanent magnet are external outside field coil, field coil is passed to the different direction electric current, make it to form with the reverse electromagnetic field driving of permanent magnetic field core and oppositely move, outage still has magnetic field of permanent magnet to keep stable state.The bistable state two-position three way magnetic valve of this structure, though make valve arrangement obtain simplifying, constituent elements reduces, and has greatly reduced power consumption.But still exist some deficiency: as three coolant channels of the setting of T type on the valve pipe, the field coil that makes the control spool move need adopt outlet structure, and need increase the coil yoke, parts are still more, affect the reduction of manufacture cost, and field coil external structure volume is still relatively large; External in addition permanent magnet is subjected to external magnetic interference easily and produces misoperation; Secondly, the middle part refrigerant inlet pipe of T type setting is made cumbersome; And the spool that simply adopts two ends band steel ball, close performance for guaranteeing valve, require spool and valve sleeve that narrow tolerance is arranged, this work in-process is comparatively difficult, and high machining accuracy makes yield rate reduce, and manufacture cost improves; Besides, this patent does not particularly point out spool and/or the two ends valve port adopts magnet case, makes the work unreliability increase, and therefore still having is worth improved place.

Summary of the invention

The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provides a kind of improved structure and making more simple, and can reduce volume greatly, is significantly reduced to this, the bistable state two-position three way magnetic valve that functional reliability is good.

The model utility purpose realizes that main the improvement is that three coolant channels are be arranged in parallel along the valve pipe, and will form bistable magnetic freeze mode valve body and be built in the circular excitation wire loop hole, and employing ferromagnetic material valve seat and spool.According to aforementioned concepts, model utility bistable state two-position three way magnetic valve, comprise the hollow ring field coil, non-magnetic conduction tubular valve body, be arranged on the valve body two ends and bring the valve seat of outlet passage into, and the spool that two valve base chambers can move back and forth in the valve body, permanent magnet on valve body both sides, middle part and/or the spool, it is characterized in that said three coolant channels are divided into one and two and be arranged in parallel along the valve pipe, there is one to be normal opening structure in two passages that wherein are set up in parallel, said tubular valve body and permanent magnet are built in the circular excitation coil hole, said valve seat, spool is made by ferromagnetic material.The permanent magnet that is provided with on valve body both sides, model utility spool place and/or the spool, with the magnet case spool, and the magnet case valve seat at two ends constitute magnetic loop jointly, cause effective adhesive and the maintenance of spool to valve seat, make spool keep stable attracting state with a certain valve seat, and under the acting in conjunction of refrigerant fluid pressure, realize " not having electric self-locking ".When the reverse travelling backwards of needs spool, pass to transient current for the control field coil, make the field coil two ends produce the reverse high magnetic fields of polar flux that produces with permanent magnet, drive the spool travelling backwards.Control magnetic flux dead electricity disappears, the polar flux stable state that spool produces according to permanent magnet, thus realize that magnetic keeps bistable state.By the control field coil being provided with the electric current of different direction, the control magnetic flux that the field coil energising is produced is opposite with permanent magnet polarization magnetic flux, drive spool in valve body two valve base chamber move left and right, reach and seal a certain coolant channel respectively, thus the various flows that changes refrigerant to.The instantaneous electric current that passes to different direction of field coil, can by electronic circuit realize or by electronic circuit alternately to the coil realization of powering end to end.

The said spool of model utility, its structural type can be to be provided with steel ball or pointed cone portion as spherical spool, spool two ends, have the tapering of protrusion or cambered surface magnet case spool to help reducing the magnetic circuit magnetic resistance like this; Reach the flexible plugging material two big classes of corrosion resistant such as end band rubber.The valve that is communicated with coolant channel on the valve seat of two ends is chewed corresponding coupling with the spool end seal, forms good sealing shutoff.For improving effective sealing that moving valve core is chewed valve, spool preferably adopts surperficial tape spool concave chute or cambered surface polygon structure, can guarantee that like this spool only has micro-gap and can not produce radial-play in valve body, thereby can guarantee that tapering or cambered surface enclosed construction are to effectively closing that valve is chewed.The normal open walk structure of said refrigerant is meant that this channel valve is chewed not closed by spool to be closed, still to keep normal open form formula that wherein a kind of comparatively easy way is that this valve is chewed indentation or the concave inward structure form be arranged to.Permanent magnet on valve body both sides, middle part or the spool, it can be permanent-magnetic clamp, also can be two separately is oppositely arranged, wherein be arranged on two permanent magnets of both sides, valve body middle part, a kind of better mode adopts a watt shape arc homopolarity to be oppositely arranged (two permanent magnet opposing side magnetic polarities are identical, all are the N utmost point or the S utmost point).Effectively control the spool migration for improving the control field coil, preferably add the magnet case material on the field coil ring core, the electromagnetic field that can make the field coil energising produce is strengthened at the valve seat place, thereby strengthen the magnetic force of inducting to valve seat, make it on valve seat to produce drive spool the magnetic field of inducting much larger than induct magnetic field and the valve fluid pressure that produce by valve body both sides or spool permanent magnet, thereby guarantee that effectively spool is oppositely moving of attracting state.

The model utility two-position three way magnetic valve, because will constitute the bistable valve body of magnetic freeze mode moves in the field coil annular distance, it is simple to make that not only valve member significantly reduces, structure becomes, it is littler that volume can become, manufacture cost descends, and because permanent magnet is built-in, effectively isolates with extraneous permeability magnetic material, the magnetic property decay is less, also is not subject to external magnetic interference and produces misoperation.Valve seat, spool adopt permeability magnetic material, improve spool and closed the reliability of hold mode and action, promptly not only help spool " self-locking " location under the field coil power failure state, and improved the reliability that the energising back valve core oppositely moves under attracting state, thereby guaranteed the stable and reliable of spool action.

Below in conjunction with the embodiment of several indefinitenesses and the description of accompanying drawing, further specify the model utility structure.

Description of drawings

Fig. 1 is the model utility first example structure schematic representation.

Fig. 2 is Fig. 1 I-I sectional structure schematic representation.

Fig. 3 is the model utility second example structure schematic representation.

Fig. 4 is model utility the 3rd an example structure schematic representation.

Fig. 5,9,10,11 is a model utility spool different structure schematic representation.

Fig. 6,7,8 is the different cross section schematic representation of model utility spool.

Figure 12 is model utility the 4th an example structure schematic representation.

Figure 13 is Figure 12 I-I sectional structure schematic representation.

Figure 14,15,16 is the another type valve core different structure of a model utility schematic representation.

Embodiment

Embodiment 1: referring to Fig. 1,2, and the reciprocating type two-position three way magnetic valve of bistable state, by circular excitation coil 10, the built-in bistable state two-position three way valve assembly that is interspersed in ring in the coil.Bistable state two-position three way valve assembly, non-magnetizer (copper pipe) the valve pipe 6 that comprises inferior bell type, internal surface vertically has some the refrigerant circulation grooves 12 that outwards protrude, two enlarged head are sealed with band single channel T type magnet case valve seat 5 and the band Twin channel T type magnet case valve seat 7 that cooperates with the valve pipe respectively, its passage respectively with three refrigerant

runner connecting tubes

1 and 8,9 are connected, the valve that wherein connects outer tube 9 is chewed the valve that connects outer tube 8 and is chewed indentation, constitute normal open walk, the thin portion of valve Guan Yaling place is provided with the relative watt shape permanent magnet 3 of a pair of homopolarity, watt shape permanent magnet is fixed on semicircle plastic card 4 internal surfaces, and two valve base chambers have magnet case steel ball spool 2.The T type projection of band Twin channel valve seat is little than the valve pipe, reserves and often opens coolant channel 11.

Embodiment 2: referring to Fig. 3, as embodiment 1, for improving the spool reliable in action, the circular excitation coil rack is provided with magnetic conductor excitation pipe 14, to strengthen the induction field intensity of two ends valve seat when switching on.

The model utility spool can also be as Fig. 5, Fig. 9, Figure 10, Figure 11 structure except that adopting steel ball, as fixing or be processed with

ball sealer

18,19 and pointed cone 22 at magnet case spool 19 two ends, or magnet case spool 19 in filling flexibility plugging material 21.The spool cross section can be as structures such as Fig. 6, Fig. 7, Fig. 8, has both guaranteed that spool and valve pipe had less clearance, guarantees the closed performance of band pointed cone or cambered surface spool, makes things convenient for refrigerant to pass through again.

Embodiment 3: referring to Fig. 4, as embodiment 1, thick straight tube-like such as tubular valve body employing, valve pipe outside stable state is arranged in the field coil skeleton 13 with permanent magnet 3, two

ends valve seat

14,17 adopts the cylindrical structural that is complementary with the valve pipe, the valve of

connection adapter

1,8 is chewed and is slightly protruded valve seat, the valve that connects adapter 9 is chewed be normal opening structure, the Cylindrical object that spool 16 adopts magnet case to make, surface Machining has the axial notch of some circulation refrigerant or adopts polygonal cross-section such as Fig. 6, Fig. 7, Fig. 8 structure, and its two ends are embedded with the flexible block 15 that the shutoff valve is chewed.

Embodiment 4: referring to Figure 12,13, and embodiment as described above, the bistable state two-position three way magnetic valve, the stable state of spool can also be taked to be provided with on spool or directly adopt permanent magnet 23 to constitute.Cause the magnetic decay for the minimizing spool moves the bump valve seat, permanent magnet spool two ends are provided with the anti-collision block of flexible sealing.

Magnet structure is set on the spool, can also have such as some kinds of forms such as Figure 14, Figure 15, Figure 16, as axially being symmetrically arranged with permanent magnet 24 or permanent-magnetic clamp, also can be flexible seals 21 that the shutoff valve chews to be arranged or sealed steel ball 25 is set at the spool two ends in the 26 both ends of the surface gluings of permanent magnet spool at magnet case spool 19.

According to model utility design, the model utility embodiment is not limited to the described concrete structure of the foregoing description, is not departing from the present invention's design, and some unsubstantialities of being done are equal to improvement, still truely uses novel protected scope.

For convenience of description, the said ferromagnetic material of model utility, magnet case are synonym.

Claims

1, a kind of bistable state two-position three way magnetic valve, comprise the hollow ring field coil, non-magnetic conduction tubular valve body, be arranged on the valve body two ends and bring the valve seat of outlet passage into, and the spool that two valve base chambers can move back and forth in the valve body, permanent magnet on valve body both sides, middle part and/or the spool, it is characterized in that said three coolant channels are divided into one and two and be arranged in parallel along the valve pipe, there is one to be normal opening structure in two passages that wherein are set up in parallel, said tubular valve body and permanent magnet are built in the circular excitation coil hole, and said valve seat, spool are made by ferromagnetic material.

2, according to the described bistable state two-position three way magnetic valve of claim 1, it is characterized in that said tubular valve body is inferior bell type, permanent magnet is arranged on the thin shank of inferior bell.

3,, it is characterized in that the permanent magnet homopolarity of both sides, said valve body middle part is oppositely arranged according to claim 1 or 2 described bistable state two-position three way magnetic valves.

4, according to the described bistable state two-position three way magnetic valve of claim 3, it is characterized in that said permanent magnet is a watt shape, be embedded in semicircle plastic card internal surface.

5, according to the described bistable state two-position three way magnetic valve of claim 1, it is characterized in that said spool is a column, the cross section is the cambered surface polygonal.

6,, it is characterized in that said cylindrical spool two ends have spherical or the pointed cone closure part according to the described bistable state two-position three way magnetic valve of claim 5.

7,, it is characterized in that there is flexible closure part at said cylindrical spool two ends according to the described bistable state two-position three way magnetic valve of claim 5.

8,, it is characterized in that said field coil ring core has the magnet case tube core according to the described bistable state two-position three way magnetic valve of claim 1.

9,, it is characterized in that said spool is a steel ball according to claim 1,2 or 8 described bistable state two-position three way magnetic valves.

10,, it is characterized in that said tubular valve body inner surface axial has the refrigerant chute according to the described bistable state two-position three way magnetic valve of claim 9.