CN2575384Y

CN2575384Y - Check valve for liquefied petroleum gas cylinder

Info

Publication number: CN2575384Y
Application number: CN 02264783
Authority: CN
Inventors: 芮志明; 谢作为
Original assignee: YIXING CITY SITONG HOUSEHOLD APPLIANCE COMPLEMENT FACTORY
Current assignee: YIXING CITY SITONG HOUSEHOLD APPLIANCE COMPLEMENT FACTORY
Priority date: 2002-09-28
Filing date: 2002-09-28
Publication date: 2003-09-24
Anticipated expiration: 2012-09-28

Abstract

The utility model relates to the improvement of a check valve for a bistable two-position three-way electromagnetic valve for a refrigerator. The utility model is characterized in that three coolant channels are arranged along a valve pipe in parallel, and a formed bistable magnetic hold type valve body is arranged in an annular hole of an annular excitation wire; a valve seat and a valve core which are made up of ferromagnetic materials are used, the valve core is lengthened is not smaller than the length of a permanent magnet, and both end surfaces of the valve core are provided with flexible plugging elements. Not only the volume of the valve body is further reduced, but also the dead suction of the valve core easily caused by the prior art can be avoided. The reliability of back drive is raised, the stabilization and the reliability of the action of the valve core can be ensured, and the utility model is more suitable for operating under low pressure. The flexible plugging elements on the end surfaces of the valve core can effectively raise the sealing ability, and thus the inner leakage of the valve is reduced, and high requirement that the 0.4MPa inner leakage is less than 10 ml/ min can be obtained.

Description

Refrigerator bistable state two-position three way magnetic valve

Technical field

Model utility is about to the improvement of refrigerator with two-position three way magnetic valve, relates in particular to the bistable state two-position three way magnetic valve.

Background technique

Chinese patent 00220268,00246524 all discloses a kind of simple in structure, and the power consumptive province refrigerator keeps reciprocating type bistable state two-position three way magnetic valve with magnetic, makes the two-position three way magnetic valve structure obtain simplifying, and constituent elements reduces, volume-diminished, and reduced power consumption.Yet above-mentioned solenoid valve still has its deficiency, as being three coolant channels that the T type is arranged on the valve pipe, making, assembles more complicated, and field coil can only adopt outlet structure, is unfavorable for that volume further dwindles; The simple cylindric spool that adopts two ends band steel ball, directly do not have the buffering hard hit and hit valve port, very stiff and demanding sealing, not only valve port hardness is had relatively high expectations, and be difficult to guarantee sealing effect, secondly, linear sealing easily makes to leak in the valve and increases, and is difficult to reach the interior leakage index of leaking in refrigerator high request such as the 0.4Mpa smaller or equal to 10ml/min, and valve gold machining and matching requirements are higher, the effectively fixing difficulty of seal spool steel ball, require spool external diameter and valve tube cavity to guarantee minimum radial clearance, effectively seal otherwise spool end stationary balls is difficult to chew formation over against valve, manufacture difficulty is big, product percent of pass is low, makes manufacture cost improve; Especially illustrate poppet shaft to being shorter in length than the permanent magnet that bilateral symmetry is provided with, the magnetic line of force that permanent magnet is produced almost all passes through spool end, easily cause spool " inhale dead " commutation difficulty, the commutation of especially working under low voltage of short spool is more difficult, thereby needs the increasing field coil.These all influence the action message and the little interior high request that leaks of solenoid valve.

Secondly, said structure is used as two to advance once going out and can not being suitable for when valve changes, can exist refrigerant pressure this moment because of shutdown side, stable state magnetic attraction opposing refrigerant pressure is not enough, the one, cause valve pressurize difficulty, leakage quantity increases in easily causing, and seriously can cause spool to be washed open by refrigerant, does not have closing function; The 2nd, spool commutation is subjected to high cryogen pressures, and commutation is unstable, can not guarantee that all valve effectively works.

Summary of the invention

The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provides a kind of improved commutation reliable, stable performance, the refrigerator of valve good reliability bistable state two-position three way magnetic valve.

The model utility purpose realizes, the main improvement is that three coolant channels with the bistable state two position three-way valve be arranged in parallel along the valve pipe, thereby the bistable magnetic freeze mode valve body of composition is built in the circular excitation wire loop hole, and employing ferromagnetic material valve seat and spool, lengthening spool length, change rigid line and be sealed into the flexible face sealing, improve the reliability of valve work.According to aforementioned concepts, model utility refrigerator 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, the permanent magnet that both sides, valve body middle part are oppositely arranged, it is characterized in that said spool, valve seat is the Cylindrical object that permeability magnetic material is made, said three coolant channels be divided into one with two or two groups of parallel being oppositely arranged, be separately fixed on the cylindrical valve seat of both sides, have one not closed by spool to be normal open walk in two passages that wherein are set up in parallel, the said permanent magnet homopolarity that is oppositely arranged is relative, and the permanent magnet of said tubular valve body and both sides is built in the circular excitation coil annular distance, said spool axial length is more than or equal to valve body both sides permanent magnet length, and its both ends of the surface have flexible closeouts.

Model utility is further to improve valve service behaviour and convenient the manufacturing, and valve body better adopts inferior bell tubular structure, and permanent magnet is arranged on the thin shank of inferior bell valve body; Valve pipe two ends endoporus enlarges, and the magnet case valve seat adopts T type structure, and normal open walk is arranged on the step of T type valve seat indentation; And the magnet case tube core is set at the field coil ring core, two ends are provided with and strengthen magnetic force magnet case framework, the electromagnetic field that can make field coil energising produce is strengthened at the valve seat place, strengthens the magnetic force of inducting to valve seat, effectively guarantees the reliability that spool oppositely moves at attracting state.

The flexible closeouts of the said spool end of model utility, be meant that valve core sealed cover and valve are non-very stiff and demanding sealing between chewing, in poppet shaft to slight telescopic resilience is arranged, main effect is spool to be chewed valve carry out effective shutoff, and reduce spool and valve and chew the very stiff and demanding defective that causes that contact, and reduction manufacture difficulty.Its structural type can be rubber or other macromolecular materials that is inlaid with anti-refrigerant in metal magnetic conducting body spool both ends of the surface, wherein a kind of better mode is to wearing sky with poppet shaft, pressure injection rubber or other macromolecular material cylinders within it, for preventing that effectively the macromolecular material long period of soaking from producing swelling in refrigerant, poppet shaft is the thick inferior bell structure in thin two ends in the middle of the macromolecule cylinder of pressure injection better adopts; Also can be with poppet shaft to wearing sky, be placed with the spacing ball sealer of both ends of the spring within it, the sealing ball can be a steel ball, also can be pottery or macromolecular material ball, forms flexible shutoff by damping spring between two balls is flexible.

Being communicated with spool both sides drain, can be to surface Machining indent intake chute (for example adopting the cross section is the polygon structure spool) to be arranged in poppet shaft, also can be to be processed with intake chute at valve interior surface.

Said normal open walk 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 on the step that is arranged on the indentation of T type.

Model utility refrigerator bistable state two-position three way magnetic valve, be arranged in parallel owing to import and export to adopt, thereby the stable state valve body can be moved in the field coil annular distance, volume is further dwindled, and because permanent magnet is built-in, effectively isolate with extraneous permeability magnetic material, the magnetic property decay is also little, is not subject to external magnetic interference and produces misoperation.Valve seat, spool adopt permeability magnetic material, and the field coil magnet case is set, improve spool and closed the reliability that keeps and oppositely move, promptly not only help spool and under the field coil power failure state, rely on permanent magnet " self-locking " location, and improved the reliability that the energising back valve core oppositely moves under attracting state, thereby guaranteed the stable and reliable of spool action.The lengthening spool has effectively avoided spool " to inhale extremely " phenomenon, has improved the reliability of reverse direction actuation, makes it to be more suitable for to work under the low voltage, and field coil is required also to reduce.The flexible closeouts of spool end effectively improves sealing ability, and the valve internal leakage is reduced greatly, can reach to leak in the 0.4Mpa to be not more than the 10ml/min high request.And flexible sealing also can suitably reduce valve pipe and spool Spielpassung, reaches valve and chews the hardness requirement, and manufacture difficulty is reduced greatly.The model utility two position three-way valve, the pressurize ability is strong, not only can be used for " one-in-and-two-out " working state usually, but also can be used for some specific (special) requirements " two advance goes out " working state.

Below in conjunction with the embodiment of four 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 the model utility second example structure schematic representation.

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

Fig. 4 is the model utility perspective view.

Embodiment

Embodiment 1: referring to Fig. 1, and the bistable state two-position three way magnetic valve, by circular excitation coil 7, built-in bistable state two-position three way valve assembly and the magnet case framework 9 (Fig. 4) that is interspersed in annular distance in the coil formed.Bistable state two-position three way valve assembly, non-magnetizer (copper pipe) valve body 6 that comprises inferior bell type, valve body two end part endoporus enlarges, relative fixed has band single channel valve T type magnet case valve seat of chewing 2.2 and the T type magnet case valve seat 2.1 of being with the Twin channel valve to chew, wherein the Twin channel end valve is chewed on the indentation step that is located at T type valve seat, constitute normal open walk, three valves are chewed respectively and are connected with 1,10 with three refrigerant pipeline connecting tubes 11, and three import and export of valve are set in parallel.The thin position of the inferior bell handle of valve body periphery installs slightly short than the spool relatively watt shape permanent magnet 3.1 and 3.2 of a pair of homopolarity, for effectively making the permanent magnet location, watt shape permanent magnet is fixed on the plastic card internal surface that two semicircles are filled the span of a man's arms, and two semicircle plastics are filled the span of a man's arms in the thin portion of the inferior bell of valve body by end face bayonet socket (not providing among the figure).The cylindric spool 4 of two valve base chamber magnet cases, side face axially is processed with intake chute 8 (also can be vertically to process some drain grooves at valve interior surface), the center spool pressure injection has the rubber seal core of being used to lead to 5, the rubber seal core also is inferior bell structure, the middle tiny rubber core swelling in use that effectively reduces.

Embodiment 2: referring to Fig. 2, as embodiment 1, wherein spool is for to be provided with spring 13 in hollow magnetic conduction cylinder, and there are limited ball sealer 12.1 and 12.2 in two end part.

Embodiment 3: referring to Fig. 3, as described above, be provided with another normal open walk 1.2 on the indentation step of single hole end T type magnet case valve seat 2.2, constitute two and advance the two two-position three way bistable electromagnetic valves that go out.Two advance the two spool axial lengths that go out valve can also can be shorter than its length greater than both sides permanent magnet length.

Embodiment 4: as described above, for strengthening the magnetic force of field coil to valve seat, be provided with magnet case tube core (not providing among the figure) in the field coil ring core.

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.

Claims

1, a kind of refrigerator 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, the permanent magnet that both sides, valve body middle part are oppositely arranged, it is characterized in that said spool, valve seat is the Cylindrical object that permeability magnetic material is made, said three coolant channels be divided into one with two or two groups of parallel being oppositely arranged, be separately fixed on the cylindrical valve seat of both sides, there is one not closed by spool to be normal open walk in two passages that wherein are set up in parallel, the said permanent magnet homopolarity that is oppositely arranged is relative, the permanent magnet of said tubular valve body and both sides is built in the circular excitation coil annular distance, and said spool axial length is more than or equal to valve body both sides permanent magnet length, and its both ends of the surface have flexible closeouts.

2, according to the described refrigerator of claim 1 bistable state two-position three way magnetic valve, it is characterized in that said permanent magnet is a watt shape, be embedded in semicircle plastics location card internal surface.

3, according to claim 1 or 2 described refrigerator bistable state two-position three way magnetic valves, it is characterized in that said valve body is inferior bell tubular structure, the permanent magnet symmetry that is oppositely arranged is embedded in the thin shank of inferior bell valve body.

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

5,, it is characterized in that there is the magnet case framework at said field coil two ends according to the described refrigerator of claim 1 bistable state two-position three way magnetic valve.

6,, it is characterized in that said cylindrical valve seat is the T type according to the described refrigerator of claim 1 bistable state two-position three way magnetic valve.

7, according to the described refrigerator of claim 1 bistable state two-position three way magnetic valve, the flexible closeouts that it is characterized in that said spool both ends of the surface be used to logical poppet shaft to the macromolecular material column-shape strip.

8,, it is characterized in that said poppet shaft is inferior bell structure to the macromolecular material column-shape strip according to the described refrigerator of claim 7 bistable state two-position three way magnetic valve.

9, according to the described refrigerator of claim 1 bistable state two-position three way magnetic valve, the flexible closeouts that it is characterized in that said spool both ends of the surface be used to logical poppet shaft to middle part spring and end ball sealer.

10,, it is characterized in that said single hole end valve seat is provided with another the normal open walk that not closed by spool according to the described refrigerator of claim 1 bistable state two-position three way magnetic valve.