CN103673428A

CN103673428A - Combination valve

Info

Publication number: CN103673428A
Application number: CN201310351335.3A
Authority: CN
Inventors: 佐伯真司; 熊仓孝尚; 金子毅
Original assignee: TGK Co Ltd
Current assignee: TGK Co Ltd
Priority date: 2012-09-24
Filing date: 2013-08-13
Publication date: 2014-03-26
Also published as: JP2014066377A; JP6040374B2; KR20140040039A

Abstract

The invention provides an expansion valve ensuring excellent assembling property of a combination valve enabling two valve portions to be linked; the expansion valve (1) comprises: a valve body (2), and a valve hole (18) is formed in a deep portion of a mounting hole (32) with a side opening; a valve seat forming member (40) inserted and fixed in the valve body (2) through the opening portion of the mounting hole (32), and a valve hole (22) coaxial with the valve hole (18) is formed in penetration; a valve core (38) configured in a valve box (28) formed between the valve hole (18) and the valve seat forming member (40), and the valve core (38) can connect with/disconnect from the valve hole (18) so as to open/close a first valve portion; a valve core (44) configured on a valve box (30), formed opposite to the valve box (28), of the valve seat forming member (40), and the valve core (44) can connect with/disconnect from the valve hole (22) so as to open/close a second valve portion, and the valve core (44) is provided with a shaft portion (46) penetrating the valve hole (22), extending and abutting against the valve core (38); a spring (52) giving potential energy to the valve core (44) in a valve-closing direction; and an anti-dropping mechanism capable of preventing the valve core (44) from dropping to the opening portion of the mounting hole (32) when the spring (52) is assembled in middle front side of the valve body (2).

Description

Combination valve

Technical field

The present invention relates to combination valve, relate in particular to the combination valve that 2 valve portions open and close in linkage.

Background technology

In the kind of refrigeration cycle of Vehicular air conditioner, be generally provided with: compressor, the refrigerant of compression cycle; Condenser, makes the refrigerant after compressed condensing; Liquid reservoir, carries out vapor-liquid separation by the refrigerant by after condensing; Expansion valve, makes the liquid refrigerants throttling expansion being separated nebulize and send; And evaporimeter, make this vaporific refrigerant evaporation, utilize its evaporation latent heat to carry out the indoor air of cooling vehicle.As expansion valve, for making the refrigerant of deriving from evaporimeter there is the appropriate degree of superheat, for example, adopt temperature and the pressure ground open and close valve portion of the refrigerant of sensing evaporator outlet, and control the temperature-type expansion valve of the cold medium flux that passes out to evaporimeter.

In such kind of refrigeration cycle, in the process of the pipe arrangement by evaporimeter, can there is the pressure loss in refrigerant, therefore this pipe arrangement is longer, its running efficiency more declines.Therefore, proposed to configure concurrently shorter 2 the slim evaporimeters of pipe arrangement, made them carry out respectively the structure (for example, with reference to patent documentation 1) of heat exchange.By such formation, the pressure loss in the time of reducing refrigerant by each evaporimeter, the running efficiency of raising kind of refrigeration cycle.

Technical literature formerly

Patent documentation

(patent documentation 1) TOHKEMY 2010-38455 communique

Summary of the invention

Invent problem to be solved

As the expansion valve that is applicable to such kind of refrigeration cycle, in this documents, disclose and be provided with concurrently and 22 valve portions that evaporimeters difference is corresponding, and in these 2 valve portions, made respectively the expansion valve of refrigerant adiabatic expansion.This expansion valve is constituted as the combination valve that 2 valve portions are linked and controlled, and the temperature of the refrigerant that converges in the downstream of 2 evaporimeters of sensing and pressure open and close these valve portions.

But the combination valve that makes like this 2 valve portions link, because its structure is more complicated, therefore need to guarantee in the fabrication stage the efficient assembleability of these 2 valve portions.In addition, such problem is not limited to above-mentioned expansion valve, such as existing too having serially other combination valve of 2 valve portions such as two check-valves.

The present invention researches and develops in view of such problem, and its object is, in making the combination valve of 2 valve portion interlocks, to guarantee the assembleability that it is good.

For solving the means of problem

For solving above-mentioned problem, the combination valve of a scheme of the present invention comprises: valve body, forms a part for fluid passage, and in the depths of this installing hole, be formed with the 1st valve opening at the installing hole of a lateral opening; Valve seat forms member, inserts and is fixed on valve body, and be formed through the 2nd valve opening with the coaxial shape of the 1st valve opening from the peristome of installing hole; The 1st spool, is configured at the 1st valve opening and valve seat and forms the 1st clack box forming between member, and engaged/disengaged opens and closes the 1st valve portion in the 1st valve opening; The 2nd spool, be configured at valve seat, form member with formed the 2nd clack box of the 1st clack box opposition side, engaged/disengaged opens and closes the 2nd valve portion in the 2nd valve opening, and has the axial region that runs through the 2nd valve opening and extend and be connected to the 1st spool; Give potential energy member, to closing valve direction, to the 2nd spool, give potential energy; And the anti-locking mechanism that comes off, give potential energy member be assembled into valve body in before state under, also can prevent the 2nd spool coming off to the peristome side of installing hole.

According to this scheme, to being located at the installing hole of valve body, from depths, insert successively assembling the 1st spool, valve seat formation member, the 2nd spool, give potential energy member, assemble thus combination valve.Now, in the mode that runs through the 2nd valve opening of valve seat formation member with axial region, assembled under the state of the 2nd spool, by the anti-locking mechanism that comes off, can prevent that the 2nd spool from coming off.Therefore, can, after this cautiously inserting and give potential energy member, can improve its assembleability.

Invention effect

By the present invention, can in the combination valve that makes 2 valve portion interlocks, guarantee the assembleability that it is good.

Accompanying drawing explanation

Fig. 1 is the profilograph of the expansion valve of embodiment.

Fig. 2 is the profile that the A-A direction of arrow of Fig. 1 is seen.

Fig. 3 means the key diagram of the formation of valve portion periphery.

Fig. 4 means the part enlarged drawing of valve portion peripheral structure of the expansion valve of variation.

Fig. 5 means the key diagram of valve portion peripheral structure of the expansion valve of another variation.

Fig. 6 means the key diagram of valve portion peripheral structure of the expansion valve of another variation.

Fig. 7 means the part enlarged drawing of valve portion peripheral structure of the expansion valve of another variation.

Fig. 8 means the key diagram of valve portion peripheral structure of the expansion valve of another variation.

The specific embodiment

Explain with reference to the accompanying drawings embodiments of the present invention.In addition, in the following description, for facility, sometimes take illustrated state as benchmark express each structure position relationship.

Present embodiment is embodied as combination valve of the present invention the temperature-type expansion valve (being called for short " expansion valve ") of the kind of refrigeration cycle that is applicable to Vehicular air conditioner.In this kind of refrigeration cycle, be provided with compressor, condenser, liquid reservoir, expansion valve, evaporimeter.As evaporimeter, between liquid reservoir and compressor, dispose concurrently the 1st evaporimeter and the 2nd evaporimeter, they carry out respectively heat exchange.By keeping cooling capacities by 2 evaporimeters, and it is slim that each evaporimeter is configured to, suppress refrigerant by time the pressure loss, improve the running efficiency of kind of refrigeration cycle.Along with 2 evaporimeters are set like this concurrently, expansion valve has corresponding to the 1st valve portion of the 1st evaporimeter with corresponding to the 2nd valve portion of the 2nd evaporimeter.

Fig. 1 is the profilograph of the expansion valve of embodiment.Fig. 2 is the profile that the A-A direction of arrow of Fig. 1 is seen.As shown in Figure 1, expansion valve 1 has valve body 2, and this valve body 2 is by forming impose predetermined machining as lower member, and this member is to obtain by the raw material consisting of aluminium alloy is carried out to extrusion molding.This valve body 2 is prism-shaped, and portion is provided with 2 valve portions of the throttling expansion of carrying out refrigerant within it.In the end of the length direction of valve body 2, be provided with the dynamical element 3 playing a role as temperature-sensitive portion and from outside, cover its cover 4.By this extrusion molding, the bottom of valve body 2 forms narrowly.

As shown in Figures 1 and 2, the sidepiece at valve body 2, is provided with: entrance 6, from the liquid refrigerants of liquid reservoir side (as the condenser side of " external heat exchanger ") importing high temperature, high pressure; The 1st export mouth 7, derives the low-temp low-pressure refrigerant after throttling expansion in the 1st valve portion to the 1st evaporimeter; The 2nd export mouth 8, derives the low-temp low-pressure refrigerant after throttling expansion in the 2nd valve portion to the 2nd evaporimeter; Introducing port 9, after importing is evaporated in the 1st evaporimeter and the 2nd evaporimeter, the refrigerant converging in their downstream; And outlet 10, the refrigerant by after expansion valve 1 is derived to compressor side.

That is, as shown in Figure 1, the bottom in the 1st side of valve body 2, entrance 6 openings, on top, outlet 10 openings.Between entrance 6 and outlet 10, be provided with screwed hole 12.In addition, as shown in Figure 2, at the central portion of the 2nd side of valve body 2, opening has the 1st export mouth 7, in lower openings, has the 2nd export mouth 8, at upper opening, has introducing port 9.In addition,, between the 1st export mouth 7 and introducing port 9, be penetrated with concurrently a pair of installing hole 13(with reference to Fig. 1).Between the 1st export mouth 7 and the 2nd export mouth 8, be also penetrated with an installing hole 13(with reference to Fig. 1).

At valve body 2, by being communicated in the 1st passage 14 of entrance 6, the valve opening 18(that is communicated in the 2nd passage 16 of the 1st export mouth 7 and connects them is equivalent to " the 1st valve opening ") form the 1st refrigerant passage.That is, it is that turning point is crooked squarely that the 1st refrigerant passage be take the 1st set valve portion of portion therebetween, the refrigerant importing is nebulized in the throttling expansion of the 1st valve portion, and derive to the 1st evaporimeter from the 1st export mouth 7 from entrance 6.

At valve body 2, by the 1st passage 14, the valve opening 22(that is communicated in the 3rd passage 20 of the 2nd export mouth 8 and connects them, be equivalent to " the 2nd valve opening ") form the 2nd refrigerant passage.That is, it is that turning point is crooked squarely that the 2nd refrigerant passage be take set the 2nd valve portion in intermediate portion, the refrigerant importing is nebulized in the throttling expansion of the 2nd valve portion, and derive to the 2nd evaporimeter from the 2nd export mouth 8 from entrance 6.

In addition, be communicated in the 4th passage 24 of introducing port 9 and be communicated in the 5th passage 26 formation the 3rd refrigerant passages (being equivalent to " low-pressure channel ") that export 10.That is, the 3rd refrigerant passage is crooked squarely at the connecting portion of the 4th passage 24 and the 5th passage 26, imports refrigerant, and it is derived to compressor from exporting 10 from introducing port 9.

That is, at the pars intermedia of the 1st refrigerant passage, be provided with valve opening 18, at the pars intermedia of the 2nd refrigerant passage, be provided with valve opening 22.Between valve opening 18 and valve opening 22, be provided with clack box 28(and be equivalent to " the 1st clack box ").Opposition side at the clack box 28 of valve opening 22, is provided with clack box 30(and is equivalent to " the 2nd clack box ").Clack box 28 becomes the bifurcation point of the 1st refrigerant passage and the 2nd refrigerant passage.Clack box 28 and clack box 30 be located at lower surface (being equivalent to " side ") opening at valve body 2, and extend through always valve opening 18 under the inner side of installing hole 32.The He Qi of each mechanism periphery mechanism that forms the 1st valve portion and the 2nd valve portion is inserted and is assembled in valve body 2 by the peristome from installing hole 32.

By the upstream side open end of valve opening 18, formed valve seat 34(and be equivalent to " the 1st valve seat ").At clack box 28, the spool 38(that is equipped with one heart resinous guiding elements 36 and stainless steel is equivalent to " the 1st spool ").Guiding elements 36 is ladder barrel shape, is pressed into the depths of installing hole 32.Spool 38 is round-ended cylinder shape, inserts in the inner side of guiding elements 36.Spool 38 is adjusted the aperture of the 1st valve portion in valve seat 34 by engaged/disengaged.That is, by spool 38 and valve seat 34, form the 1st valve portion.

In the centre position of installing hole 32, be pressed into discoideus valve seat and form member 40.By this valve seat, form member 40 and mark off clack box 28 and clack box 30.Run through valve seat form member 40 centre be formed with valve opening 22.Valve opening 18 and valve opening 22 are configured on same axis.By the downstream open end of valve opening 22, form valve seat 42(and be equivalent to " the 2nd valve seat ").At clack box 30, the spool 44(that is equipped with stainless steel is equivalent to " the 2nd spool ").Spool 44 is adjusted the aperture of the 2nd valve portion in valve seat 42 by engaged/disengaged.That is, by spool 44 and valve seat 42, form the 2nd valve portion.

Spool 44 has end from it and plays the axial region 46 extending along axis direction.Axial region 46 runs through valve opening 22 and extends to spool 38 inner sides, and its front end face is connected to spool 38 bottoms.Thus, spool 38 is connected with spool 44, can action integratedly on axis direction.In addition the details that, each valve portion and periphery thereof form can be described below.

Be screwed with and adjust screw 48 to the bottom of sealing installing hole 32.Spool 44 is supported member 50 from below supporting, to closing valve direction gives potential energy spring 52(to spool 44, as " giving potential energy member ", plays a role) be loaded between this supporting member 50 and adjustment screw 48.By be screwed into the amount of being screwed into of valve body 2 to adjusting screw 48, adjust, can adjust the load of spring 52.For preventing that the O ring 54 that refrigerant is sewed is loaded between adjustment screw 48 and valve body 2.

In addition, in the upper end of valve body 2, make the inside and outside intercommunicating pore 60 being communicated be formed with the 3rd refrigerant passage quadrature, seal these intercommunicating pore 60 ground and be screwed with dynamical element 3.Dynamical element 3 is loaded between upper casing 62 and lower casing 64 to clip the mode of the film 66 consisting of sheet metal, and disposes dish (disc) 68 in these lower casing 64 sides.At the confined space being surrounded by upper casing 62 and film 66, enclose and have temperature-sensitive gas.O ring 70 for preventing that refrigerant from sewing is housed between dynamical element 3 and valve body 2.The pressure of the refrigerant by the 3rd refrigerant passage and temperature are by intercommunicating pore 60 and be located at behind the Bu Huo gap, hole of dish 68, are sent to below film 66.

At the central portion of valve body 2, be provided with the shoulder hole 72 that connects the 1st refrigerant passage and the 3rd refrigerant passage, the working beam 74 of strip inserts in the minor diameter part of this shoulder hole 72 slidably.Working beam 74 is loaded between dish 68 and spool 38.Working beam 74, spool 38, spool 44 and spring 52 are provided on same axis.Thus, the driving force that the displacement of film 66 produces can be situated between and is sent to spool 38 and then is sent to spool 44 by dish 68 and working beam 74, and the 1st valve portion and the 2nd valve portion are opened and closed.At the large-diameter portion of shoulder hole 72, insert in the O ring 76 that working beam 74 ground dispose sealing use outward, prevent that the refrigerant between the 1st refrigerant passage and the 3rd refrigerant passage from sewing.

In the first half of working beam 74, insert in the support cylindraceous 78 that crosses the 2nd refrigerant passage and configure.The bottom of support 78 is pressed in the large-diameter portion of shoulder hole 72, and encircles 76 movement by its underpart end face restriction O.The upper end butt of working beam 74 also inserts in dish 68 set recess below, and the bottom of working beam 74 inserts in valve opening 18, and is connected to spool 38.Working beam 74 is given and the spring 80 of predetermined lateral load is loaded between support 78 and working beam 74.By this lateral load, can suppress the vibration of the working beam 74 that the change of refrigerant pressure causes.

Fig. 3 means the key diagram of valve portion peripheral structure.(A) be the B portion enlarged drawing of Fig. 2, (B) be the stereogram of guiding elements.

Guiding elements 36 is by having been used integrally formed (injection molded) of predetermined mold, resin material to obtain.As shown in Fig. 3 (B), guiding elements 36 has main body 82 cylindraceous, and spool 38 penetratingly inserts in this main body 82 formed through holes 83 in inner side.In upper end and the bottom of main body 82, along radial direction, be outwards equipped with 3 foots 84 respectively.Guiding elements 36 is fixed in the mode that these foots 84 are pressed into the inner peripheral surface of installing hole 32.3 foots 84, are by by the upper end of main body 82 cylindraceous and bottom hole enlargement, and this wide diameter portion 3 places are in a circumferential direction carried out to nubbin after otch forms, and its outer peripheral face separately becomes along the curved surface of installing hole 32 inner peripheral surfaces.

In addition, as illustrated, 3 foots 84 of upside and 3 foots 84 of downside have in a circumferential direction nested each other position relationship.Such formation makes to be easily shaped with the mould of cutting apart up and down.The leading section of each foot is the cone-shaped towards inner side inclination, so that guiding elements 36 is easily inserted in installing hole 32.In addition, guiding elements 36 is configured and has with respect to the point-symmetric shape of its center of gravity, makes to insert with making no distinction of rank.In addition, as illustrated, guiding elements 36 is that front end engaging by upside foot 84 wall in the end, depths of installing hole 32 is positioned.

Like this, by making the external diameter of main body 82 be less than the external diameter of a circle of

foot

84,84 of Bing Ge foots arrange notch, and having guaranteed has larger flow path area between the installing hole 32 at clack box 28 places and guiding elements 36.That is, become the structure that can fully guarantee from the flow of the refrigerant that the 1st passage 14 imports to clack box 28, also Jie is exported by valve opening 18 or valve opening 22.

Spool 38 be at upside, there is bottom have a round-ended cylinder shape.The upper end of spool 38 becomes towards the cone-shaped of top path, and with its conical surface engaged/disengaged in valve seat 34.Spool 38 is set with the radial direction clearance size of guiding elements 36, makes the spool 38 can automatic aligning (alignment) during in valve seat 34 in dropping place.In other words, the external diameter of spool 38 is formed than the little predetermined amount of the internal diameter of main body 82, so that can realize this automatic aligning.That is, guiding elements 36 supporting spools 38, not equal to it plays a role along the limiting member of the displacement of radial direction as restriction spool 38.In addition, by such formation, from figure, can clearly see, the section of circulation passage that is formed at guiding elements 36 outsides is more much larger with the clearance of guiding elements 36 than spool 38.

Spool 38 has the accepting hole 86 towards the desired depth of lower opening, and the axial region 46 of spool 44 is inserted into wherein from its lower ending opening portion.Axial region 46 is bonded with the form of extending upward from spool 44, its front end face is connected to spool 38 bottoms.The size of the radial direction clearance of axial region 46 and spool 38 is set and makes spool 44 dropping places energy automatic aligning when valve seat 42.In other words, the external diameter of axial region 46 is formed than the little predetermined amount of the internal diameter of accepting hole 86, so that can realize this automatic aligning.That is, spool 38 plays a role as limiting the limiting member of the displacement of axial region 46 on radial direction.

By such formation, can realize dropping place simultaneously, this while dropping place can realize state and spool 44 dropping places that spool 38 dropping places close the 1st valve portion in valve seat 34 simultaneously and in valve seat 42, close the state of the 2nd valve portion, and can automatic aligning when spool 38 and spool 44 each comfortable dropping place.In addition, axial region 46 is set to such an extent that be deeper than the position of centre of gravity of spool 38 with respect to the insertion depth of spool 38, to keep the stable connecting state of spool 38 and axial region 46.By such formation, the Distance Shortened between the upper and lower fulcrum of spool 38, moment is difficult to act on spool 38, can make its having stable behavior.

In addition, the bottom of spool 38 is by hole enlargement, and small-sized helical spring 90(plays a role as " elastomer ") be loaded between this wide diameter portion 88 and axial region 46.Helical spring 90 is stairstepping, that is, distolaterally have large-diameter portion 92, at another, distolaterally have minor diameter part 94, and insert in wide diameter portion 88 at one of its axis direction, also inserts in the axial region of axial region 46.Helical spring 90 with the outer peripheral face of large-diameter portion 92 be connected to spool 38 inner peripheral surface, with the inner peripheral surface of minor diameter part 94, be connected to the outer peripheral face of axial region 46, by this large-diameter portion 92 along radial direction to internal strain, minor diameter part 94 is outwards out of shape along radial direction, generates the elastic reactance of radial direction.Helical spring 90 links spool 38 and axial region 46 by this elastic reactance.

That is,, when assembled valve portion and periphery mechanism thereof, to installing hole 32, from depths, insert successively spool 38 and guiding elements 36, valve seat formation member 40, spool 44, supporting member 50 and spring 52 and assemble.In the present embodiment, first, guiding elements 36 is pressed into the end of installing hole 32.Now, also valve body 2 is not installed to dynamical element 3.Then, for confirm spool 38 dropping places when the valve seat 34 to the insertion depth in installing hole 32, spool 38 is inserted in guiding elements 36, until touch valve seat 34, and confirm that working beam 74 is now apart from the projecting height of valve body 2.

Then, insert this valve seat and form member 40, it is pressed into than locating slightly on the lower its regular position that is pressed into temporarily.Now, spool 38 is formed member 40 by valve seat and supports from its rear, therefore can not come off from installing hole 32.Under this state, insert spool 44, and its axial region 46 is inserted in spool 38.Now, spool 38 is supported to be connected to the state of axial region 46 front end faces.Then, under this state, spool 44 is touched after valve seat 42, be further pressed into valve seat and form member 40, at working beam 74 during in projecting height mentioned above, in spool 38 dropping places, during in valve seat 34, fixed valve base forms the position of member 40.Dropping place when thus, can realize spool 38 and spool 44.

Then, the assembly after assembling supporting member 50, spring 52 and adjustment screw 48 is inserted in installing hole 32.In the meantime, because spool 44 is hung by spool 38, therefore spool 44 can not come off from installing hole 32.That is the mechanism that, links spool 38 and axial region 46 by helical spring 90 plays a role as " anti-locking mechanism comes off ".Like this, by the anti-locking mechanism that comes off, prevent coming off of spool 44, therefore can cautiously insert helical spring 90 after this, can improve its assembleability.

In addition, in the present embodiment, the butt mutually owing to making spool 44 and supporting member 50 become Different Individual, therefore even if supporting member 50 produces lateral load because of the effect of spring 52, also less on the impact of spool 44.Especially be formed smooth differently above from supporting member 50, the bearing surface with supporting member 50 of spool 44 is R shape, therefore axial region 46 is almost a state contacting with the butt state of supporting member 50, is difficult to be subject to the impact of such lateral load.Such formation and above-mentioned increasing axial region 46 are worked in coordination to the formation of the insertion depth of spool 38, can make the having stable behavior of spool 44.

In the expansion valve 1 forming as described above, dynamical element 3 senses pressure and the temperature of returning to the refrigerant coming from the 1st evaporimeter and the 2nd evaporimeter, its film 66 displacements.The displacement of this film 66 becomes driving force, is situated between and is transferred to spool 38 and spool 44 by dish 68 and working beam 74, opens and closes the 1st valve portion and the 2nd valve portion.In addition, the liquid refrigerants of supplying with from liquid reservoir is imported from entrance 6, and along with, being become after the vaporific refrigerant of low temperature, low pressure by throttling expansion by the 1st valve portion, is fed in the 1st evaporimeter.In addition,, also along with by the 2nd valve portion and by throttling expansion, be fed into the 2nd evaporimeter after becoming the vaporific refrigerant of low temperature, low pressure.

The preferred embodiment of the present invention has more than been described, but the present invention is not limited to this specific embodiment, certainly can in the scope of technological thought of the present invention, carries out various distortion.

［ variation 1 ］

Fig. 4 means the part enlarged drawing of valve portion peripheral structure of the expansion valve of variation.In the above-described embodiment, represented to make the smooth of supporting member 50 above, and made the lower surface of spool 44 become the example of R shape.In variation, as shown in Fig. 4 (A), what make supporting member 250 becomes R shape above, makes the lower surface of spool 244 smooth.By such formation, also can make spool 244 and the butt state of supporting member 250 almost become and contact, can obtain the effect the same with above-mentioned embodiment.Or, can as shown in Fig. 4 (B), make the lower surface of spool 245 become R shape, the recess 253 of inverted cone shape is set on supporting member 255.By such formation, compare with the formation of Fig. 4 (A), can limit relatively moving of spool 245 and supporting member 255, but the lower surface of spool 245 is R shape, therefore how much can relax this restriction.

［ variation 2 ］

Fig. 5 means the key diagram of valve portion peripheral structure of the expansion valve of another variation.(A) meaning the part enlarged drawing of this valve portion peripheral structure, is (B) to form the elastomeric plane of anti-locking mechanism that comes off, and is (C) profile that the C-C direction of arrow of (B) is seen.That is, in the above-described embodiment, represented that employing helical spring 90 is as elastomeric example.In this variation, as elastomer, adopt as shown in Fig. 5 (A)～(C), as the stop nut (push nut) 290 of spring material.

This stop nut 290 be at one of its axis direction distolaterally there is large-diameter portion 292, in another distolateral shape with minor diameter part 294, passed through the wide diameter portion 88 of inserting spool 38, and passed through the axial region of inserting axial region 46.Large-diameter portion 292 is cylindric, plays the crooked part in taper ground to the inside form minor diameter part 294 by end from it.As Fig. 5 (B) and (C), minor diameter part 294 is by forming by being along the circumferential direction formed with a plurality of (being 8 in illustrated example) spring leaf 296 that a plurality of otch that expand towards its front end obtain.Stop nut 290 is connected to the inner peripheral surface of spool 38 with the outer peripheral face of large-diameter portion 292, with a plurality of spring leafs 296 of minor diameter part 294, be connected to the outer peripheral face of axial region 46, but pass through this large-diameter portion 292 along radial direction to internal strain, each spring leaf 296 is outwards out of shape along radial direction, generates the elastic reactance of radial direction.Stop nut 290 links spool 38 and axial region 46 by this elastic reactance.In addition, although at this exemplified with stop nut, also can adopt other leaf spring.

［ variation 3 ］

Fig. 6 means the key diagram of formation of valve portion periphery of the expansion valve of another variation.(A) meaning the part enlarged drawing of the formation of this valve portion periphery, is (B) to form the elastomeric plane of anti-locking mechanism that comes off, and is (C) profile that the C-C direction of arrow of (B) is seen.In this variation, as elastomer, adopt the rubber 390 as shown in Fig. 6 (A)～(C).

This rubber 390 is at one of its axis direction and distolaterally has large-diameter portion 392, at another, distolaterally has the cylindric of minor diameter part 394, by passed through insert spool 38 wide diameter portion 88, and passed through the axial region of inserting axial region 46.4 ridges 396 that rubber 390 equally spaced arranges with the outer peripheral face at large-diameter portion 392 are connected to the inner peripheral surface of

spool

38, and 4 ridges 398 that equally spaced arrange with the inner peripheral surface at minor diameter part 294 are connected to the outer peripheral face of axial region 46, by each ridge, along radial direction, be out of shape, can generate elastic reactance.Rubber 390 links spool 38 and axial region 46 by this elastic reactance.In addition,, at this, represented an example of the shape of rubber 390, but also can adopt other shape.

［ variation 4 ］

Fig. 7 means the part enlarged drawing of valve portion peripheral structure of the expansion valve of another variation.In this variation, as the anti-locking mechanism that comes off, adopt the displacement limit structure based on back-up ring.That is, at spool 238, do not configure elastomer as embodiment described above, but play a role as " engaged portion " at the axial region 246 assembling back-up ring 251(of spool 44).In the precalculated position of axial region 246, engaging is used for the fixedly embeded slot 248 of back-up ring 251.By such structure, although axial region 246 is not fixed in spool 238, embeded slot 248 is engaged above valve seat formation member 40 (playing a role as " engaging portion "), therefore can prevent that spool 44 from coming off.By back-up ring 251, can also limit spool 44 to the displacement of valve opening position.In addition,, as back-up ring 251, can suitably adopt so-called E type circle, C type back-up ring, CA circle, check ring or stop nut etc.

［ variation 5 ］

Fig. 8 means the key diagram of valve portion peripheral structure of the expansion valve of another variation.(A) meaning the part enlarged drawing of the formation of this valve portion periphery, is (B) plane that forms the fixator of the anti-locking mechanism that comes off.And (D) mean the plane of another variation of fixator (C).In this variation, as the anti-locking mechanism that comes off, adopt the displacement limit structure based on fixture structural unit.That is, as shown in Fig. 8 (A), be provided with the axial region 348 extending along axis direction downwards from spool 344, its lower surface is connected to supporting member 50.At valve seat, form the Lower Half of member 340, be pressed into the fixture structural unit 350 of ring-type.

As shown in Fig. 8 (B), fixture structural unit 350 is provided with the through hole 352 for axial region 348 is run through from its centre, and is provided with a plurality of (being 3 in this variation) intercommunicating pore 354 around at it.Spool 344 is configured between valve seat 42 and fixture structural unit 350.By such formation, although axial region 246 is not fixed in spool 238, because spool 344 is engaged, above fixture structural unit 350, (as " engaging portion ", play a role), therefore can prevent that spool 344 from coming off.That is,, in this variation, spool 344 plays a role as " engaged portion ".In this forms, axial region 348 can limit spool 344 to the displacement of radial direction with the clearance of through hole 352, and can carry out automatic aligning.That is, the size of the clearance of the radial direction of axial region 348 and through hole 352 is set and makes spool 344 dropping places energy automatic aligning when valve seat 42.

In addition, in this variation, as shown in Fig. 8 (B), make the profile of fixture structural unit 350 become toroidal, but also can the fixture structural unit 360 shown in Fig. 8 (C), make the outer polygon that forms.By such formation, in the time of in the circular hole that fixture structural unit 360 is pressed into valve seat formation member 340 Lower Halves, can reduce the outer peripheral face of fixture structural unit 360 and the contact area that valve seat forms the inner peripheral surface of member 340, and in this is pressed into, can reduce to be pressed into the required load of fixture structural unit 360 (being pressed into load).Or, also can the fixture structural unit 370 shown in Fig. 8 (D), form through hole and intercommunicating pore.

In addition, in above-mentioned embodiment and variation, represented combination valve of the present invention to be configured to the example of expansion valve, but such as two check-valves that also can be constituted as arranged in series etc., there is other combination valve of 2 valve portions.In addition, represented combination valve to be used in the example of the kind of refrigeration cycle of Vehicular air conditioner, but certainly can it be used in to other device with 2 valve portions in order to control flowing of working fluid.

Label declaration

1 expansion valve, 2 valve bodies, 3 dynamical elements, 6 entrances, 18,22 valve openings, 28,30 clack boxes, 32 installing holes, 36 guiding elements, 38 spools, 40 valve seats form member, 44 spools, 46 axial regions, 50 supporting members, 52 springs, 74 working beams, 86 accepting holes, 90 helical springs, 238,244 spools, 246 axial regions, 250 supporting members, 251 back-up rings, 290 stop nuts, 340 valve seats formation members, 344 spools, 348 axial regions, 350 fixture structural units, 390 rubber.

Claims

1. a combination valve, is characterized in that, comprising:

Valve body, forms a part for fluid passage, and in the depths of this installing hole, is formed with the 1st valve opening at the installing hole of a lateral opening,

Valve seat forms member, and from the peristome of above-mentioned installing hole, insert and be fixed on above-mentioned valve body, and being formed through the 2nd valve opening with the coaxial shape of above-mentioned the 1st valve opening,

The 1st spool, is configured at above-mentioned the 1st valve opening and above-mentioned valve seat and forms the 1st clack box forming between member, and engaged/disengaged opens and closes the 1st valve portion in above-mentioned the 1st valve opening,

The 2nd spool, be configured at above-mentioned valve seat, form member with formed the 2nd clack box of above-mentioned the 1st clack box opposition side, engaged/disengaged opens and closes the 2nd valve portion in above-mentioned the 2nd valve opening, and has the axial region that runs through above-mentioned the 2nd valve opening and extend and be connected to above-mentioned the 1st spool

Give potential energy member, to closing valve direction, to above-mentioned the 2nd spool, give potential energy, and

The anti-locking mechanism that comes off, above-mentioned give potential energy member be assembled into above-mentioned valve body in before state under, also can prevent above-mentioned the 2nd spool coming off to the peristome side of above-mentioned installing hole.

2. combination valve as claimed in claim 1, is characterized in that,

The above-mentioned anti-locking mechanism that comes off consists of the elastomer being loaded between above-mentioned the 1st spool and above-mentioned axial region, and the elastic reactance producing by this elastomeric distortion, links above-mentioned the 1st spool and above-mentioned axial region.

3. combination valve as claimed in claim 2, is characterized in that,

Above-mentioned the 1st spool has the main body that has bottom tube-like of the accepting hole on axis direction with desired depth, with its bottom, opens and closes above-mentioned the 1st valve opening, in addition, from its peristome, inserts above-mentioned axial region;

Above-mentioned elastomer distolaterally has large-diameter portion, at another, distolaterally has minor diameter part at one of axis direction, and be installed into the outer peripheral face of its large-diameter portion be connected to above-mentioned the 1st spool inner peripheral surface, with the inner peripheral surface of minor diameter part, be connected to the outer peripheral face of above-mentioned axial region.

4. combination valve as claimed in claim 3, is characterized in that,

Above-mentioned elastomer is by distolaterally having large-diameter portion, form at another distolateral helical spring with the stairstepping of minor diameter part at one of axis direction, is inserted near the peristome of above-mentioned the 1st spool and passes through to plug the axial region of stating the 2nd spool.

5. combination valve as claimed in claim 1, is characterized in that,

The above-mentioned anti-locking mechanism that comes off consists of limit structure, and the engaging that described limit structure forms the engaging portion of member and is located at the engaged portion of above-mentioned the 2nd spool by being located at above-mentioned valve seat, limits above-mentioned the 2nd spool to the displacement of valve opening position.

6. combination valve as claimed in claim 5, is characterized in that,

At above-mentioned the 2nd spool, at the opposition side of the 1st axial region as above-mentioned axial region, extend and be provided with the 2nd axial region;

At above-mentioned valve seat, form member, be provided with fixture structural unit, this fixture structural unit has the through hole that above-mentioned the 2nd axial region is run through;

Face above-mentioned the 2nd spool and above-mentioned the 2nd valve opening opposition side forms above-mentioned engaged portion;

The opposed faces with above-mentioned the 2nd spool of above-mentioned fixture structural unit forms above-mentioned engaging portion;

The size of the clearance of the radial direction of above-mentioned the 2nd axial region and above-mentioned through hole is set the automatic aligning that makes to promote above-mentioned the 2nd spool.

7. the combination valve as described in claim 5 or 6, is characterized in that,

Above-mentioned the 1st spool has the main body that has bottom tube-like on axis direction with desired depth accepting hole, with its bottom, opens and closes above-mentioned the 1st valve opening, in addition, from its peristome, inserts above-mentioned axial region.

8. the combination valve as described in claim 3 or 7, is characterized in that,

Can carry out while dropping place, this while dropping place is to realize above-mentioned the 1st spool dropping place in the 1st set valve seat of the open end of above-mentioned the 1st valve opening, the state of closing above-mentioned the 1st valve portion simultaneously, and above-mentioned the 2nd spool dropping place is in the 2nd set valve seat of the open end of above-mentioned the 2nd valve opening, the state of closing above-mentioned the 2nd valve portion; The size of the clearance of the radial direction of the axial region of above-mentioned the 2nd spool and above-mentioned the 1st spool is set and makes above-mentioned the 1st spool and above-mentioned the 2nd spool can automatic aligning when dropping place separately.

9. combination valve as claimed in claim 8, is characterized in that,

Above-mentioned axial region is set to such an extent that be deeper than the position of centre of gravity of above-mentioned the 1st spool with respect to the insertion depth of above-mentioned the 1st spool.

10. combination valve as claimed in claim 8 or 9, is characterized in that,

The above-mentioned potential energy member of giving is by forming with respect to the fixing spring of above-mentioned valve body and the supporting member that is installed in the end of this spring, and is configured to make to be situated between and to above-mentioned the 2nd spool, gives potential energy by this supporting member;

The bearing surface of at least one of above-mentioned the 2nd spool and above-mentioned supporting member is R shape.

11. combination valves as described in any one of claim 1 to 10, is characterized in that,

Be constituted as expansion valve, this expansion valve is located in kind of refrigeration cycle, make the refrigerant flowing into via external heat exchanger by each inner valve portion, make it to be thus supplied to the 1st evaporimeter and the 2nd evaporimeter after throttling expansion, the pressure and temperature that sensing returns to from each evaporimeter the refrigerant coming is controlled the aperture of each valve portion, and this refrigerant is derived to compressor;

This combination valve comprises:

The 1st passage, for the refrigerant from said external heat exchanger being imported to above-mentioned the 1st clack box,

The 2nd passage, is situated between and is connected with above-mentioned the 1st clack box by above-mentioned the 1st valve opening, for the refrigerant through above-mentioned the 1st valve portion is exported to above-mentioned the 1st evaporimeter,

The 3rd passage, is connected in above-mentioned the 2nd clack box, for the refrigerant through above-mentioned the 2nd valve portion is exported to above-mentioned the 2nd evaporimeter,

The 4th passage, for importing the refrigerant returning from above-mentioned the 1st evaporimeter and above-mentioned the 2nd evaporimeter;

The 5th passage, is connected with above-mentioned the 4th passage and forms low-pressure channel, for derive refrigerant to above-mentioned compressor, and

Dynamical element, be located at above-mentioned valve body, senses flow cross above-mentioned low-pressure channel refrigerant temperature and pressure move, and be situated between and move and to be linked to above-mentioned the 1st spool by crossing the working beam of above-mentioned low-pressure channel, adjust the aperture of above-mentioned the 1st valve portion and above-mentioned the 2nd valve portion;

Wherein, above-mentioned working beam, above-mentioned the 1st spool, above-mentioned the 2nd spool and the above-mentioned potential energy member of giving are provided on same axis, make above-mentioned the 1st spool remain between above-mentioned working beam and above-mentioned axial region.