CN106224608B - The constant-current device and fluid switch of fluid switch - Google Patents

Abstract

The present invention relates to the constant-current device of fluid switch and fluid switch.Constant-current device includes: shell, with fluid inlet portion and fluid outlet portion；And constant current spool, installation is in the housing, comprising: valve seat has the import being connected to fluid inlet portion, the outlet and inner cavity being connected to fluid outlet portion；And galvanostat, it is mounted in the inner cavity and forms the access for being connected to inlet and outlet fluid, wherein, the galvanostat is configured to the section for reducing the section of the access with Fluid pressure increase in a fluid pressure range and increasing the access with Fluid pressure reduction, to keep the fluid flow substantially constant in the exit in the fluid pressure range.The present invention can be such that discharge keeps constant within the scope of certain change in fluid pressure.

Description

The constant-current device and fluid switch of fluid switch

Technical field

The present invention relates to fluid control technology field more particularly to the constant-current devices and fluid switch of fluid switch.

Background technique

Fluid switch such as tap is built-in with switching valve generally to control the discharge of fluid, such as large and small two grades of stream Amount switching etc..

Such as Publication No. CN201666407U, publication date be on December 8th, 2010 Chinese patent disclose it is a kind of by The water-saving tap of button switching water discharging, be equipped with one big flow hole of band and a small metering orifice crosses water body, and crossing installation in water body can slide Dynamic water distribution component, water distribution component can cover big flow hole under action of reset spring, to realize two grades of runoff investigations.

In another example the Chinese patent that Publication No. CN2603132, publication date are on 2 11st, 2004 discloses two grades of one kind Delay flushing valve is arranged two physics position-limiting units, and button is enclosed on valve operation end pipe diameter or in button There is certain deflection around valve rod, the size of amount of flush water is controlled by the length of control button stroke, allows user can With freely regulating capacity according to actual needs.

Above two tap can realize the size variation of discharge.It has a disadvantage in that, when being connected to water inlet When generating a certain range of change in fluid pressure in supply line, even if this variation keeps being in a certain switching in switching valve Discharge can still be had an impact under state, that is, discharge increases when Fluid pressure becomes larger, discharge when Fluid pressure becomes smaller Reduce.Thus it will cause the discharge variation in the constant situation of switching valve state.

Therefore, there is the demands that fluid switch improves in industry, are generated with improving because of change in fluid pressure Discharge problem fluctuated.

Summary of the invention

The present invention is intended to provide a kind of constant-current device of fluid switch, can make within the scope of certain change in fluid pressure Discharge is kept constant.

The present invention is also directed to a kind of fluid switch using above-mentioned improved constant-current device.

According to an aspect of the invention, there is provided a kind of constant-current device of fluid switch, comprising: shell has stream Body inlet portion and fluid outlet portion；And constant current spool, installation is in the housing, comprising: valve seat has to enter with fluid The import of oral area connection, the outlet and inner cavity being connected to fluid outlet portion；And galvanostat, it is mounted in the inner cavity and shape At make inlet and outlet fluid be connected to access, wherein the galvanostat be configured in a fluid pressure range with Fluid pressure increases and reduces the section of the access and increase the section of the access with Fluid pressure reduction, thus The fluid flow substantially constant in the exit is kept in the fluid pressure range.

In this way, being reduced the section of fluid passage when Fluid pressure becomes larger by means of galvanostat and when Fluid pressure reduces Increase the section of fluid passage, so that the flow for ensuring to flow out within the scope of certain pressure is constant.

In one preferred embodiment, the galvanostat includes: ontology, has the hole for suitably forming the access Mouthful；And elastic component, it is mounted at the aperture and is configured in the fluid pressure range as Fluid pressure increases Add and deforms increase and deform and reduce as Fluid pressure is reduced.Provide in this way it is a kind of simple, keep flow constant Galvanostat deforms increase in pressure increase by means of being mounted on the elastic component at aperture to block the larger of fluid passage Deformation reduces to block the small cross sections of fluid passage and realize when section and pressure are reduced.

Preferably, the ontology has backwards to the open concave surface in outlet, and the aperture extends from concave surface and penetrate through this Body, the concave surface top are equipped with stopper section, and the elastic component is between concave surface and stopper section.It is easily installed elastic component in this way.

In one preferred embodiment, the constant current spool further includes the actuation part for being connected to the ontology, energy Enough driving ontologies are moved between the first position and the second position to change the access for being connected to inlet and outlet fluid.This Sample can be realized adjustment of the constant-current device between two gears to adjust the size of discharge.Wherein, under any gear, The constant of discharge can be realized by means of galvanostat.

Preferably, the inner wall of valve seat is equipped with the circumferential narrowing portion being located at below import, when being in first position, ontology Periphery connects with circumferential narrowing portion and the aperture of ontology forms the access for being connected to inlet and outlet fluid, is being in the second position When, at least part of ontology and circumferential narrowed portion from and the interval between the aperture of ontology and ontology and valve base inner wall is common Form the access for being connected to inlet and outlet fluid.

Preferably, galvanostat includes two ontologies and two elastic components, wherein first ontology, which has, is connected to its aperture simultaneously First ontology is divided into the peripheral recess of upper and bottom section, second ontology is axially adjacent to below first ontology And the aperture of two ontologies is in fluid communication, and first elastic component is located at part on the top surface of second ontology, and second Elastic component is located on the top surface towards the lower part of second ontology.

Preferably, when being in first position, the periphery of the lower part of first ontology connects and circumferential direction with circumferential narrowing portion Recess portion is connected to the import of valve seat, when being in the second position, the periphery of the upper part of first ontology connect with circumferential direction narrowing portion and The top surface of upper part and the import of valve seat are substantially aligned.

Preferably, the section of the peripheral recess is along tapered from the direction of the periphery of the first ontology heart thereto.In this way, Convenient for fluid is introduced into aperture from import.

Preferably, the actuation part includes: bar, is axially movable inserted into the valve seat, wherein the ontology with It is set on bar dynamicly；First actuating core, is set on bar and is mounted in valve seat, and the top of the first actuating core has Multiple first inclined-planes circumferentially；Second actuating core, is set on bar servo-actuatedly and is at least partially disposed in valve seat, described The part of second actuating core being located in valve seat has circumferentially arranged with multiple convex blocks, the bottom side of convex block corresponding to the first inclined-plane Second inclined-plane；And spring part, it is drivingly connected the bar；Wherein, the internal perisporium of valve seat has circumferentially spaced multiple Fin and the groove being formed between fin, when entering in the groove under the action of power of the convex block in spring part, ontology In the first position, when being resisted against on fin under the action of power of the convex block in spring part, ontology is in the second It sets.

Preferably, the actuation part further includes being connected to the actuation button of the bar, the spring part be resisted against actuation button with Between valve seat.

Preferably, the valve seat includes: First body portion, wherein the inlet and outlet is formed in first pedestal On part；Second pedestal part is detachably mounted on the First body portion, wherein the inner cavity is by the first pedestal portion Divide and the second pedestal part limits jointly, the first actuating core is supported on the second pedestal part on the face of inner cavity；With And third pedestal part, it is detachably mounted on second pedestal part, wherein the fin and groove are formed in third On pedestal part, in the second actuating core insertion third pedestal part.

According to another aspect of the present invention, a kind of fluid switch, including constant-current device above-mentioned are provided.

It is obvious after reading the application that a part of other features and advantages of the present invention will be those skilled in the art , another part will be described in conjunction with the accompanying in specific embodiment below.

Detailed description of the invention

Hereinafter, carrying out the embodiment that the present invention will be described in detail in conjunction with attached drawing, in which:

Fig. 1 is the schematic diagram of constant current spool according to first embodiment of the invention；

Fig. 2 is the decomposition diagram of constant current spool according to first embodiment of the invention；

Fig. 3 is the schematic diagram that constant current spool according to first embodiment of the invention is in the first gear；

Fig. 4 is the schematic diagram that constant current spool according to first embodiment of the invention is in the second gear；

Fig. 5 is the schematic diagram of constant current spool according to first embodiment of the invention, wherein eliminating actuation button and Three valve seat parts；

Fig. 6 is the schematic diagram of the third pedestal part of constant current spool according to first embodiment of the invention；

Fig. 7 is the third pedestal part schematic view from the bottom of Fig. 6；

Fig. 8 is the schematic diagram of first ontology of constant current spool according to first embodiment of the invention；

Fig. 9 is the schematic diagram of second ontology of constant current spool according to first embodiment of the invention；

Figure 10 is the schematic diagram of the constant-current device with constant current spool according to first embodiment of the invention, wherein permanent Flow valve core is in the first gear；

Figure 11 is the schematic diagram of the constant-current device with constant current spool according to first embodiment of the invention, wherein permanent Flow valve core is in the second gear；

Figure 12 is the schematic diagram of the constant current spool of second embodiment according to the present invention.

In the present invention, the same or similar appended drawing reference indicates the same or similar feature.

Description of symbols:

10. constant-current device；11. shell；111. fluid inlet portion 111；112. fluid outlet portion；12. bubbler；13. lid Part；14. sleeve；15. buckle structure；20. constant current spool；30. valve seat；31. import；32. outlet；33. inner cavity；34. First Body portion；341. circumferential narrowing portions；342. peripheral flange；343. annular groove；344. sealing ring；35. the second pedestal part；351. all To flange；352. sealing ring；353. projection；354. dimpling；355. boss；356. washer；36. third pedestal part；360. Axial fin；361. fin；362. groove；363. overhang；364. opening；365. through-hole；366. recess portion；367. indent knots Structure；368. wall；369. center protrusion；40. galvanostat；41. first ontology；410. first apertures；411. first concave surfaces； 412. peripheral recess；Part on 413.；414. lower parts；415. through hole；42. second ontology；420. second apertures；421. Second concave surface；422. through hole；43. first elastic component；44. second elastic component；45. an ontology；450. aperture； 46. an elastic component；50. actuation part；51. bar；52. the first actuating core；521. first inclined-planes；522. raised；523. first is perpendicular To face；53. the second actuating core；531. convex block；532. second inclined-planes；533. third inclined-planes；534. second vertical faces；54. spring Part；55. actuation button；551. axial groove；552. convex buckle；553. cantilever.

Specific embodiment

Description, the signal of the constant-current device and its constant current spool of the present invention will be described in detail disclosed fluid switch Property scheme.Although providing attached drawing is in order to which some embodiments of the present invention are presented, attached drawing need not be by specific embodiment Size is drawn, and certain features can be amplified, remove or office is cutd open to be better shown and explain the disclosure.It is attached Partial component in figure can carry out according to actual needs position adjustment under the premise of not influence technique effect.Go out in the description Existing phrase " in the accompanying drawings " or similar term need not refer to all attached drawings or example.

Hereinafter be used to describe certain directional terminologies of attached drawing, for example, "inner", "outside", " top ", " lower section " and Other directional terminologies, it will accordingly be understood that for its normal meaning and criticize often see attached drawing when related those directions.It removes Otherwise indicated, directional terminology described in this specification is substantially according to conventional direction understood by one of ordinary skill in the art.

Term " first " used in the present invention, " first ", " second ", " second " and its similar terms, at this Any sequence, quantity or importance are not offered as in invention, but for distinguishing a component with other components.

Referring to Fig. 1 to Fig. 9, constant current spool 20 according to first embodiment of the invention, including valve are illustrated Seat 30, actuation part 50 and galvanostat 40.Actuation part 50 includes axially movable being inserted into the bar 51 of valve seat 30 and being mounted on bar 51 On actuating core 52,53.Galvanostat 40 is located in the inner cavity 33 of valve seat 30 and is mounted on bar 51, can be in actuation part 50 It is moved between the first position and the second position under driving, to realize the adjusting of two grades of waters.In the feelings for being in any gear Under condition, even if the Fluid pressure in supply line generates certain variation, galvanostat 40 can guarantee the final fluid flowed out through it Flow constant.

The specific structure of valve seat 30 is shown in Fig. 2 into Fig. 4, including the First body portion being detachably connected between each other 34, the second pedestal part 35 and third pedestal part 36.As shown in Figure 3 and Figure 4, First body portion 34, which is formed, is similar to tubular Hollow structure, and there is the import 31 that be connected to hollow part and export 32.The inner wall of First body portion 34 is formed with week To narrowing portion 341, the galvanostat 40 for will be described in detail later is cooperated to realize the switching between two grades of waters.Week It is located at the lower section of import 31 to narrowing portion 341.The top of First body portion 34 is formed with external thread section and is located at external screw thread The peripheral flange 342 of section lower section.The lower, outer perimeter of First body portion 34 is formed with annular groove 343, for example close for embedding sealing part Seal 344 etc..

Second pedestal part 35 is mounted on First body portion 34, and is limited jointly with First body portion 34 aforementioned Inner cavity 33.Second pedestal part 35 is formed with internal screw thread, engages for screwing with the external screw thread of First body portion 34.Another In one unshowned embodiment, the second pedestal and the first pedestal are melting engagement, gluing, ultrasonic bonding or clamping etc..? The periphery of second pedestal part 35 is formed with dimpling 354 and the peripheral flange 351 positioned at 354 lower section of dimpling.Under engagement state, The peripheral flange 342 of the peripheral flange 351 of second pedestal part 35 and First body portion 34 separately to be embedded in wherein Sealing element such as sealing ring 352 etc..For the ease of the movement of guiding bar 51, it is equipped with preferably on the second pedestal part 35 to inner cavity 33 The projection 353 of extension, bar 51 enter in inner cavity 33 after passing through the projection 353.

Third pedestal part 36 is mounted on the second pedestal part 35, and by means of the second pedestal part 35 and 33 phase of inner cavity Interval.The lower part of third pedestal part 36 is formed with overhang 363, is equipped in overhang 363 micro- with the second pedestal part 35 Convex 354 corresponding opening 364.In the engaged condition, the dimpling 354 of the second pedestal part 35 is caught in third pedestal part 36 In opening 364, prevent the second pedestal part 35 and third pedestal part 36 from disengaging.In another unshowned embodiment, the Two pedestal parts 35 and third pedestal part 36 are to be threadedly engaged, melt engagement, gluing or ultrasonic bonding etc..In conjunction with referring to figure 6 and Fig. 7, the top of third pedestal part 36 form through-hole 365 for insertion rod 51 and actuating core 52,53.Around through-hole 365 It is circumferentially spaced to be equipped with axially extending multiple fins 361, groove 362 is formed between fin 361.The fin 361 and groove 362 with actuating core 52,53 for matching so that galvanostat 40 can be located in first position or the second position.Preferably, The bottom side of fin 361 goes out concave inward structure 367 by two planes bounds, for actuating core to be oriented to and positioned.

Although showing split type dismountable valve seat 30 in figure, in another unshowned embodiment, valve seat 30 can be integral type.

The structure of actuation part 50 is shown in Fig. 3 into Fig. 5, including bar 51, first activates core 52, second and activates core 53 and bullet Spring part 54.Wherein bar 51 is inserted into valve seat 30 and protrudes into inner cavity 33, can be along its axial movement.Activate the first actuating core of core 52 are set on bar 51 and are supported on the face of inner cavity 33 backwards of the second pedestal part 35, by means of activating core 52 for first Axial and circumferential are realized in the corresponding recess portion 366 that protrusion 522 on periphery is caught in 36 inner circumferential of third pedestal part Positioning.Preferably, boss 355 is equipped at the top of the second pedestal part 35 to be embedded in the jack of the first actuating core 52, convex Bolster such as washer 356 is equipped between platform 355 and the first actuating core 52.As shown in figure 5, along week on the top surface of the first actuating core 52 To the first vertical face 523 for being equipped at intervals with multiple first inclined-planes 521 and being connected between two neighboring first inclined-plane 521, they It is respectively used to be oriented to and position the second actuating core 53 of actuating core.

With continued reference to Fig. 5, the second actuating core 53 is set on bar 51 and can move with bar 51.It is preferred that being equipped on bar 51 The snap ring being contained in card slot activates core 53 to axially position second.A part insertion third pedestal of second actuating core 53 In part 36, periphery in this section is equipped with multiple convex blocks 531 of circumferentially spaced arrangement.The bottom side of the convex block 531 formed with Corresponding second inclined-plane 532 in the first inclined-plane 521 of first actuating core 52, forms and the second inclined-plane 532 in the top side of convex block 531 The third inclined-plane 533 of intersection, and the second vertical face 534 is connected between the second inclined-plane 532 and third inclined-plane 533.

Spring part 54 is axially moved for drive rod 51.In Fig. 1 and embodiment shown in Fig. 2,54 sets of spring part It is located on third pedestal part 36, the end of the stretching valve seat 30 of bar 51 is connected with actuation button 55, and spring part 54 is connected to third With drive rod 51 between pedestal part 36 and actuation button 55.Preferably, as shown in Figure 3 and Figure 4, third pedestal part 36 is formed with Wall 368 and center protrusion 369 separately, and 54 sets of spring part on center protrusion 369.Actuation button 55 is inserted into wall 368 In interval between center protrusion 369.It is further preferred that the inner peripheral surface of wall 368 and the outer peripheral surface of actuation button 55 are formed The guide frame of male-female engagement is such as equipped with axial fin 360 in the inner peripheral surface of wall 368, and the outer peripheral surface of actuation button 55 is equipped with Axial groove 551.

Galvanostat 40 can be moved with the movement of bar 51, and specific structure is shown in Fig. 3 to Fig. 4 and Fig. 8 into Fig. 9. In an illustrated embodiment, galvanostat 40 includes first ontology 41 being set on bar 51, is adjacent to the first noumenon 41 axially Second ontology 42 of lower section and two elastic components being separately mounted on the two ontologies 41,42.

As shown in figure 8, the periphery of first ontology 41 is formed with peripheral recess 412, to first ontology 41 be divided being Along two axial parts, i.e., upper part 413 and lower part 414.The middle part of first ontology 41 forms through hole 415 to be inserted into Bar 51.Around circumferentially spaced multiple first apertures 410 of arrangement of the through hole 415, these first apertures 410 run through this first Ontology 41 is simultaneously connected to peripheral recess 412.First elastic component 43 be placed in the upper part 413 of first ontology 41 backwards to second On the top surface of a ontology 42 and it is located at the first aperture 410, such as covers a part in the first aperture 410.Do not show at another In embodiment out, at least part insertion aperture of elastic component.Preferably, which is spacious backwards to the outlet 32 of valve seat 30 The concave surface 411 opened, convenient for accommodating first elastic component 43.Additionally, it is preferred that in the top of concave surface 411, in the corresponding position of bar 51 Carry out first elastic component 43 of axial stop as stopper section equipped with the snap ring being contained in card slot.The top of first ontology 41 Points 413 and the periphery of lower part 414 and the circumferential narrowing portion 341 of valve seat 30 it is corresponding.

As shown in figure 9, the middle part of second ontology 42 forms through hole 422 with insertion rod 51.Around 422 edge of through hole It is circumferentially-spaced to arrange that multiple second apertures 420 corresponding with multiple first apertures 410, these second apertures 420 run through second A ontology 42.Second elastic component 44 be placed in second ontology 42 towards on the top surface of the lower part 414 of first ontology 41 simultaneously At the second aperture 420, such as cover a part in the second aperture 420.In another unshowned embodiment, elastic component At least part insertion aperture in.Preferably, which is backwards to the open concave surface 421 in outlet 32 of valve seat 30, convenient for holding Receive second elastic component 44.Axially stop additionally, it is preferred that forming stopper protrusion in the downside of first ontology 41 as stopper section Keep off second elastic component 44.

The principle of constant current spool 20 is illustrated with reference to the accompanying drawing.

Referring to Fig. 3, thus it is shown that constant current spool 20 is in schematic diagram when the first gear.The second actuating core 53 is convex at this time Block 531 is withstood on by spring part 54 in the groove 362 of third pedestal part 36, and two ontologies are in its first position, i.e., first The upper part 413 of ontology 41 is separated with the circumferential narrowing portion 341 of First body portion 34, and the peripheral recess of first ontology 41 The import 31 of 412 connection valve seats 30, the periphery of the lower part 414 of first ontology 41 connect with circumferential narrowing portion 341.It is preferred that The two sides up and down on ground, circumferential narrowing portion 341 are inclined-plane, in order to guide fluid.In addition, its preferred section of peripheral recess 412 Direction along the outer circumferential center from first ontology 41 is tapered, can also play the role of guiding fluid.At this point, fluid is from valve After the import 31 of seat 30 flows into, enter the first aperture 410 of first ontology 41 through peripheral recess 412 along direction shown in arrow. Since the periphery of first ontology 41 and the second ontology connects, fluid is only capable of flowing into second ontology from the first aperture 410 42 the second aperture 420 is simultaneously finally flowed out from the outlet of valve seat 30 32, without from first ontology 41 and second ontology 42 Between flow out, i.e. the first aperture 410 and the second aperture 420 limits the import 31 for valve seat 30 of sening as an envoy to jointly and outlet 32 is in fluid communication Access.Once the supply line fluid pressure for being connected to the import 31 of valve seat 30 changes, such as Fluid pressure becomes larger When, second elastic component 44 on the top surface of second ontology 42, which deforms, to be increased, to more greatly block the second hole The section of mouth 420, has more fluids to flow through the second aperture 420 to avoid the Fluid pressure with increase.Correspondingly, if stream Body pressure becomes smaller, and the deformation of second elastic component 44 reduces, to block the section in the second aperture 420, less to avoid stream Amount reduces with reduced Fluid pressure.The different deformations generated by second elastic component 44 with pressure size are come different The section in the second aperture 420 is blocked to degree, to guarantee the flow substantially constant from 32 outflow of the outlet of valve seat 30.

When needing to switch gear, actuation button 55 is pressed downwards, drives the second actuating core 53 to move downward by bar 51.The The convex block 531 of two actuating cores 53 is detached from 362/ fin 361 of groove of third pedestal part 36 and continues to move downward until convex block First inclined-plane 521 of 531 lowermost end contact the first actuating core 52, and rotated by a small margin under the guiding on the first inclined-plane 521, directly 523 backstop of the first vertical face for activating core 52 by first to the second vertical face 534 of convex block 531.Actuation button 55 is unclamped later, Under the action of the power of spring part 54, actuation button 55 is popped up, and drives the second actuating core 53 to move upwards by bar 51, until The fin 361 of 531 top of the convex block contact third pedestal part 36 of second actuating core 53, and in the concave inward structure of fin 361 It is rotated by a small margin under 367 guiding, until reaching the most vertex of concave inward structure 367.At this point, constant current spool 20 switches to Fig. 4 institute The second gear shown.

As shown in figure 4, the convex block 531 of the second actuating core 53 is abutted against in the lower of effect of spring force in the second gear On the fin 361 of third pedestal part 36, two ontologies are in its second position, i.e., the upper part 413 of first ontology 41 Periphery connect with the circumferential narrowing portion 341 of First body portion 34, the top surface (concave surface) of the upper part 413 of first ontology 41 It is substantially concordant with the downside of import 31, and the periphery of the lower part 414 of first ontology 41 is separated with circumferential 341 phase of narrowing portion. At this point, fluid enters the first hole after the import 31 of valve seat 30 inflow, along the top surface of direction first shown in arrow ontology 41 Mouth 410.Fluid can flow to the outlet 32 of valve seat 30 through the gap between 30 inner wall of first ontology 41 and valve seat later, can also Enter second aperture 420 of second ontology 42 to pass through the first aperture 410 to flow to the outlet 32 of valve seat 30.That is the first hole Mouth 410 and the second aperture 420 combine, and being collectively formed together with the gap between 30 inner wall of first ontology 41 and valve seat makes valve seat The access that 30 import 31 and outlet 32 is in fluid communication.Once being connected to the supply line fluid pressure of the import 31 of valve seat 30 It changing, such as when Fluid pressure becomes larger, first elastic component 43 on the top surface of first ontology 41, which deforms, to be increased, To more greatly block the section in the first aperture 410, there are more fluids to flow into avoid the Fluid pressure with increase First aperture 410.Correspondingly, if Fluid pressure becomes smaller, the deformation of first elastic component 43 reduces, to less block the The section in one aperture 410, reduces to avoid flow with reduced Fluid pressure.By first elastic component 43 with pressure size And the different of generation deform to block the section in the first aperture 410 to some extent, to guarantee from 32 stream of the outlet of valve seat 30 Flow substantially constant out.

When needing to switch to the first gear, actuation button 55 is pressed, drives the second actuating core 53 to move downward by bar 51 And it is detached from the fin 361 of third pedestal part 36.Second actuating core 53, which moves to, makes the lowermost end of its convex block 531 contact the first cause First inclined-plane 521 of dynamic core 52 simultaneously rotates under the guiding on first inclined-plane 521 by a small margin, until the second of convex block 531 is vertical Face 534 is by 523 backstop of the first vertical face of the first actuating core 52.Then actuating core is unclamped, activates core under the promotion of spring force It moves upwards, drives the second actuating core 53 to move synchronously by bar 51, until the convex block 531 of the second actuating core 53 is headed into adjacent Groove 362 in, so that first ontology 41 and second ontology 42 return to first position shown in Fig. 3.

Although the constant current spool 20 of two grades of adjustings is shown in figure, it will be appreciated by a person skilled in the art that this is not Restriction to protection scope because the number of gear does not influence final constant current, as long as elastic component with Fluid pressure and Change the section for blocking fluid passage, so that it may play the role of keeping keeping constant current in a certain range.For example, not at one In the embodiment shown, constant current spool 20 only have a fixed gear, an ontology be fixed in the inner cavity 33 of valve seat 30 and with The inner wall of valve seat 30 connects, and is equipped with concave surface in the top surface of the ontology to accommodate elastic component and have the hole for running through ontology from concave surface Mouthful.When change in fluid pressure, elastic component deforms to block the section in aperture in various degree, and 32 stream of outlet equally may be implemented The constant of amount.

Figure 10 to Figure 11 shows the constant-current device 10 using above-mentioned constant current spool 20.The constant-current device 10 is, for example, water Faucet.As shown, constant current spool 20 is installed in in fluid inlet portion 111 and the shell in fluid outlet portion 112 11, and The import 31 of valve seat 30 is connected to fluid inlet portion 111, and the outlet 32 of valve seat 30 is connected to fluid outlet portion 112.Shell 11 Fluid outlet portion 112 preferably screw and be connected with bubbler 12.The sleeve 14 to play a protective role is disposed around constant current spool 20 It stretches out on the end of shell 11 and is screwed with shell 11 and is connect.Cover piece 13 is fixed in actuation button 55 and covers on sleeve 14, and Cover piece 13 and shell 11 are separately.Preferably, buckle structure 15 is formed between cover piece 13 and actuation button 55 to help axially position. Such as actuation button 55 is equipped with cantilever 553 of the top with convex buckle 552, and cover piece 13 has corresponding bayonet/recess.

Referring to Figure 12, the constant current spool 20 of second embodiment according to the present invention is illustrated, is had and the The similar valve seat 30 of one embodiment and actuation part 50, difference, which is galvanostat 40 only, to be had an ontology 45 and is mounted on this An elastic component 46 on the concave surface of one ontology 45.When constant current spool 20 is in the first gear state, an ontology 45 Periphery connect with the circumferential narrowing portion 341 of valve seat 30 and the concave surface of ontology 45 and the import 31 of valve seat 30 are corresponding, to flow Body is only capable of flowing to the outlet 32 of valve seat 30 by the aperture 450 on an ontology 45 after the import 31 of valve seat 30 inflow.And One elastic component 46 is mounted on the concave surface of an ontology 45, and different degrees of change is generated in change in fluid pressure Shape, thus the section in different degrees of closure aperture 450, principle is similar with one embodiment, herein for a saving piece It will not go into details for the purpose of width.

When pressing actuation part 50 makes constant current spool 20 similarly switch to the second gear with one embodiment, this Ontology 45 is all separated with the circumferential narrowing portion 341 of valve seat 30, thus the fluid a part warp flowed into from the import 31 of valve seat 30 The aperture 450 of one ontology 45 flow to the outlet 32 of valve seat 30, inner wall of the another part through an ontology 45 and valve seat 30 Between gap flow to the outlet 32 of valve seat 30.Therefore, in second gear, constant current spool 20 can not be played in Fluid pressure The effect for making the fluid at the outlet of valve seat 30 32 keep flow constant under variable condition.

Although not each embodiment only includes one it should be appreciated that this specification describes according to various embodiments A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say As a whole, the technical solutions in the various embodiments may also be suitably combined for bright book, and forming those skilled in the art can be with The other embodiment of understanding.

The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any Those skilled in the art, made equivalent variations, modification and combination under the premise of not departing from design and the principle of the present invention, It should belong to the scope of protection of the invention.

Claims (9)

1. a kind of constant-current device of fluid switch (10) characterized by comprising shell (11), with fluid inlet portion (111) and fluid outlet portion (112)；And constant current spool (20), it is mounted in the shell (11), comprising:

Valve seat (30), have be connected to fluid inlet portion (111) import (31), be connected to fluid outlet portion (112) out Mouth (32) and inner cavity (33)；And

Galvanostat (40), is mounted in the inner cavity (33) and formation makes import (31) and exports the logical of (32) fluid communication Road, wherein the galvanostat (40) is configured in a fluid pressure range with Fluid pressure increase and described in reducing The section of access and the section for increasing the access with Fluid pressure reduction, to be kept in the fluid pressure range Fluid flow substantially constant at the outlet (32)；

The galvanostat (40) includes: ontology (41,42,45), have suitably form the access aperture (410,420, 450)；And

Elastic component (43,44,46) is mounted at the aperture (410,420,450) and is configured in the Fluid pressure It deforms as Fluid pressure increases and increases and deform and reduce as Fluid pressure is reduced in range, the ontology (41,42, 45) have backwards to outlet (32) the open concave surface (411,421), the aperture (410,420,450) from concave surface (411, 421) extend and penetrate through ontology (41,42,45), be equipped with stopper section above the concave surface (411,421), the elastic component (43, 44,46) between concave surface (411,421) and stopper section；

The constant current spool (20) further includes the actuation part (50) for being connected to the ontology (41,42,45), can drive ontology (41,42,45) it moves between the first position and the second position to change the institute for making import (31) and exporting (32) fluid communication State access.

2. the constant-current device (10) of fluid switch according to claim 1, which is characterized in that the inner wall of valve seat (30) is equipped with Circumferential narrowing portion (341) below import (31), when being in first position, the periphery of ontology (41,42,45) and circumferential direction Narrowing portion (341) connects and the formation of the aperture (410,420,450) of ontology makes import (31) and exports the logical of (32) fluid communication Road, be in the second position when, at least part of ontology (41,42,45) separated with circumferential narrowing portion (341) and ontology (41, 42,45) interval between aperture (410,420,450) and ontology (41,42,45) and valve seat (30) inner wall be collectively formed make into The access that mouth (31) and outlet (32) are in fluid communication.

3. the constant-current device (10) of fluid switch according to claim 2, which is characterized in that galvanostat (40) includes two Ontology (41,42) and two elastic components (43,44), wherein first ontology (41) have be connected to its aperture (410) and by this One ontology (41) is divided into the peripheral recess (412) of part (413) and lower part (414), and second ontology (42) is axial adjacent It is connected to below first ontology (41) and the aperture (410,420) of two ontologies (41,42) is in fluid communication, first elastic component (43) part (413) are located on the top surface of second ontology (42), second elastic component (44) is located at second ontology (42) towards on the top surface of the lower part (414).

4. the constant-current device (10) of fluid switch according to claim 3, which is characterized in that when being in first position, the The periphery of the lower part (414) of one ontology (41) connects and peripheral recess (412) connection valve seat with circumferential narrowing portion (341) (30) import (31), when being in the second position, the periphery of the upper part (413) of first ontology (41) and circumferential narrowing portion (341) connect and the top surface of upper part (413) and the import (31) of valve seat (30) are substantially aligned.

5. the constant-current device (10) of fluid switch according to claim 3, which is characterized in that the peripheral recess (412) Section along tapered from the direction of the periphery of first ontology (41) heart thereto.

6. the constant-current device (10) of fluid switch according to claim 1, which is characterized in that actuation part (50) packet Include: bar (51) is axially movable inserted into the valve seat (30), wherein the ontology (41,42,45) is set in servo-actuatedly On bar (51)；First actuating core (52) is set on bar (51) and is mounted in valve seat (30), first actuating core (52) Top there are multiple first inclined-planes (521) circumferentially；Second actuating core (53), be set on bar (51) servo-actuatedly and It is at least partially disposed in valve seat (30), the part of second actuating core (53) being located in valve seat (30) is circumferentially arranged with multiple Convex block (531), the bottom side of convex block (531) have the second inclined-plane (532) corresponding to the first inclined-plane (521)；And

Spring part (54) is drivingly connected the bar (51)；Wherein, the internal perisporium of valve seat (30) has circumferentially spaced more A fin (361) and the groove (362) being formed between fin (361), when convex block (531) is in the work of the power of spring part (54) When in the lower entrance groove (362), ontology (41,42,45) is in the first position, when convex block (531) is in spring part (54) when be resisted against on fin (361) under the action of power, ontology (41,42,45) is in the second position.

7. the constant-current device (10) of fluid switch according to claim 6, which is characterized in that the actuation part (50) is also wrapped The actuation button (55) for being connected to the bar (51) is included, the spring part (54) is resisted against between actuation button (55) and valve seat (30).

8. the constant-current device (10) of fluid switch according to claim 6, which is characterized in that the valve seat (30) includes: First body portion (34), wherein the import (31) and outlet (32) are formed on the First body portion (34)；

Second pedestal part (35) is detachably mounted on the First body portion (34), wherein the inner cavity (33) by First body portion (34) and the second pedestal part (35) limit jointly, and first actuating core (52) is supported on the second pedestal Partially (35) are on the face of inner cavity (33)；And

Third pedestal part (36) is detachably mounted on second pedestal part (35), wherein the fin (361) and Groove (362) is formed on third pedestal part (36), in the second actuating core (53) insertion third pedestal part (36).

9. a kind of fluid switch, which is characterized in that including constant-current device described in any item of the claim 1 to 8 (10).