CN104344016A - Four-way reversing valve - Google Patents
Four-way reversing valve Download PDFInfo
- Publication number
- CN104344016A CN104344016A CN201310330835.9A CN201310330835A CN104344016A CN 104344016 A CN104344016 A CN 104344016A CN 201310330835 A CN201310330835 A CN 201310330835A CN 104344016 A CN104344016 A CN 104344016A
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- China
- Prior art keywords
- slide block
- plane
- boss
- connecting rod
- way change
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a four-way reversing valve experiencing small friction during reversing and higher in switching reliability. The four-way reversing valve comprises a slider press-fitted to a valve seat and a link used for pushing the slider; the link has a carrier structure; the slider has a bearing structure matching with the carrier structure; when the link pushes the slider to slide, the carrier structure applies an upward component force, perpendicular to a sliding face of the slider, to the bearing structure. When the link applies a push force to the slider, the link produces a push force perpendicular to contact faces of the link and the slider; the push force can decompose the upward component force perpendicular to the sliding face; thus, a supporting force is provided for the slider, positive pressure of the slider upon the valve seat is shared, frictional resistance borne by the slider during reversing is reduced, smooth reversing of the four-way reversing valve is guaranteed, shake and noise occurring in the reversing process are reduced, and switching reliability is improved.
Description
Technical field
The present invention relates to valve body technical field, particularly relate to a kind of four-way change-over valve.
Background technique
The feature of existing frequency converting air conditioner unit is that range of working pressure is wider, and this just requires that the four-way change-over valve matched reliably can realize the switching of freezing, heating, and can not produce abnormal noise in the process switched simultaneously.
Please refer to Fig. 1-Fig. 3, Fig. 1 is the perspective view of a kind of set-up mode of slide block of four-way change-over valve in prior art; Fig. 2 is the perspective view of a kind of set-up mode of connecting rod of four-way change-over valve in prior art; Fig. 3 is the cross-sectional view of a kind of set-up mode of existing four-way change-over valve.
Four-way change-over valve of the prior art comprises slide block 1 ', connecting rod 2 ' and valve seat 3 ', valve seat 3 ' offers E, S, C tri-working holes, valve body is provided with the high-pressure mouth D be communicated with hyperbaric chamber, under the effect of hyperbaric chamber, slide block 1 ' is fitted on valve seat 3 ' hermetically, as shown in Figure 3; Connecting rod 2 ' offers bayonet socket 21 ', slide block 1 ' stretches in described bayonet socket 21 ' with its two side ends, so that the promotion of connecting rod 2 ' can be with movable slider 1 ' to slide, just achieve the commutation of four-way change-over valve when slide block 1 ' is from the OFF Slideslip of valve seat to ON side or from ON Slideslip to OFF side.
As shown in Figure 3, definition slide block 1 ' is front end near one end of ON side, is rear end near one end of OFF side, then promote slide block 1 ' at connecting rod 2 ' and be switched to the process of ON side from OFF side, connecting rod 2 ' contacts with the ear end face of slide block 1 ' and coordinates, and is in separated state with the front-end face of slide block 1 '; Otherwise promote slide block 1 ' at connecting rod 2 ' and be switched to the process of OFF side from ON side, connecting rod 2 ' contacts with the front-end face of slide block 1 ' and coordinates, and is in separated state with the ear end face of slide block 1 '.
In the commutation process of four-way change-over valve, slide block 1 ' is subject to all the time from the horizontal forward of connecting rod 2 ' or thrust F ' backward, and its force bearing point is positioned at the horizontal position that connecting rod 2 ' contacts with slide block 1 '; Meanwhile, under the effect of hyperbaric chamber, slide block 1 ' also can produce surface friction drag f ' at the surface of contact with valve seat 3 ', and its Impact direction is contrary with pushing direction, acts on the horizontal position of valve seat 3 ' and slide block 1 ' surface of contact, as shown in Figure 3.
Although hyperbaric chamber can ensure the sealing reliability of slide block 1 ' and valve seat 3 ' to slide block 1 ' applied pressure, in the process that this pressure slides at slide block 1 ', larger surface friction drag f ' can be produced; When surface friction drag f ' is larger, shake and noise in commutation process, can be produced, simultaneously also can due to the switching reliability of the obstruction reduction four-way change-over valve of surface friction drag f '.
Therefore, how arranging a kind of four-way change-over valve, to reduce the surface friction drag produced in commutation process, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of four-way change-over valve, the frictional force in its commutation process is less, switches reliability higher.
For solving the problems of the technologies described above, the invention provides a kind of four-way change-over valve, comprise and be pressed on the slide block on valve seat and the connecting rod for promoting described slide block, described connecting rod has holder and carries structure, described slide block have to carry with described holder that structure matches bear structure, promote in the process of described skid at described connecting rod, described holder is carried structure and is produced the slip surface perpendicular to described slide block and component upwards to described structure of bearing.
Four-way change-over valve of the present invention, connecting rod and slide block are provided with the holder cooperatively interacted and carry structure and bear structure, when commutating, connecting rod applies in the process of Driving force to slide block, a Driving force perpendicular to both surface of contact can be produced to slide block, this Driving force can decompose the component produced perpendicular to slip surface and upwards, to provide the support force to slide block, thus share slide block and act on positive pressure on valve seat, and then the surface friction drag that reduction slide block is subject in commutation process, ensure that four-way change-over valve completes commutation smoothly; In addition, the reduction of surface friction drag can also alleviate the shake and noise that produce in commutation process effectively, improves the switching reliability of four-way change-over valve.
Preferably, it is the carrying inclined-plane be obliquely installed upward relative to described slip surface that structure is carried in described holder, described bearing structure be obliquely installed down and can fit with corresponding described carrying inclined-plane bear inclined-plane.
Described holder is carried structure and is born the ramp structure that structure can be set to cooperatively interact, promote in the process of skid at connecting rod, described carrying inclined-plane with bear inclined-plane and can mutually closely fit together, then the Driving force of connecting rod to slide block acts on whole bearing on inclined-plane, stably to promote skid; On the other hand, this Driving force decompose generation support force be comparatively evenly distributed in described in bear corresponding to inclined-plane one section of slip surface on, the support of continuous and effective can be produced to slide block.
Preferably, described carrying inclined-plane and the described inclined-plane that bears all are arranged between 45 degree ~ 80 degree relative to the angle of inclination of described slip surface.
Described carrying inclined-plane and the angle of inclination of bearing inclined-plane can be arranged between 45 degree ~ 80 degree, and the setting of this angle can produce enough support forces to slide block, thus the surface friction drag be subject to when effectively reducing slide block commutation; Meanwhile, the setting of this angle can not make the support force of connecting rod to slide block excessive, affects the sealing reliability of slide block and valve seat, also can not reduce the Driving force for commutating too much, in order to avoid impact commutation.
Preferably, the left and right sides of described slide block is equipped with described boss, and the left and right sides of described connecting rod is equipped with the receiving cavity of fore-and-aft direction size slightly larger than described boss; Front and back two inwall of described receiving cavity is formed described in two and carries inclined-plane, and front and back two outer wall of described boss is formed described in corresponding two and bears inclined-plane.
Slide block and connecting rod can arrange the boss and receiving cavity that cooperatively interact, then both junction surfaces are set to inclined-plane, inclined-plane and carrying inclined-plane is born described in being formed respectively, anteroposterior dimension due to boss is slightly less than described receiving cavity, then when connecting rod promotes skid, receiving cavity is supported to be in the carrying inclined-plane on rear side of it and is born inclined-plane on rear side of boss, thus promotes slide block forward slip; Meanwhile, the carrying inclined-plane of front side and the inclined-plane that bears of front side are separated, and to avoid boss stuck in receiving cavity, prevent from affecting the sealing of slide block and valve seat because of stuck rear being maked somebody a mere figurehead by connecting rod of boss.
Preferably, the top of described boss is not more than the size of lower ending opening at fore-and-aft direction of described receiving cavity in the size of fore-and-aft direction.
Front and back inwall due to receiving cavity forms described carrying inclined-plane, carry inclined-plane described in two to be all obliquely installed upward relative to slip surface, therefore the anteroposterior dimension of the lower ending opening of described receiving cavity is minimum, in like manner, the anteroposterior dimension of the top of boss is maximum, and when the anteroposterior dimension of the top of boss is not more than the lower ending opening of described receiving cavity, boss can embed in described receiving cavity from the lower end of receiving cavity, to complete the installation of slide block and connecting rod, and be convenient to dismantle.
Preferably, the upper end open of described receiving cavity and the inwall at lower ending opening place are all outwards bent to form chamfering.
The setting of chamfering is convenient to boss and is pushed in receiving cavity, improves the dismounting convenience of connecting rod and slide block.
Preferably, the left and right sides of described slide block is equipped with the boss of at least two front and back distributions, and correspondingly, the left and right sides of described connecting rod is equipped with identical number and the described receiving cavity of front and back distribution.
Slide block can arrange at least two boss in compartment of terrain along the longitudinal direction, to improve slide block harmony stressed in the longitudinal direction, avoid slide block to tilt forward and back because of unbalance stress in commutation process, while improving connection reliability, improve the sealing reliability of whole valve body.
Preferably, described slide block is provided with boss described in even number, and boss described in even number is symmetrically distributed in its fore-and-aft direction about the center line of described slide block.
On this basis, boss can also be symmetrical about the center line of slide block, then the support force that is subject in the longitudinal direction of slide block is comparatively balanced, not only can improve the reliability of connection, also make the reversing force of different direction equal, to improve the stationarity of commutation.
Accompanying drawing explanation
Fig. 1 is the perspective view of a kind of set-up mode of slide block of four-way change-over valve in prior art;
Fig. 2 is the perspective view of a kind of set-up mode of connecting rod of four-way change-over valve in prior art;
Fig. 3 is the cross-sectional view of a kind of set-up mode of existing four-way change-over valve;
Fig. 4 is the cross-sectional view of four-way change-over valve provided by the present invention in a kind of embodiment;
Fig. 5 is the perspective view of a kind of set-up mode of connecting rod provided by the present invention;
Fig. 6 is the side view of connecting rod shown in Fig. 5;
Fig. 7 is the plan view of connecting rod shown in Fig. 5;
Fig. 8 is the perspective view of a kind of set-up mode of slide block provided by the present invention;
Fig. 9 is the plan view of slide block shown in Fig. 8;
Figure 10 is the side view of slide block shown in Fig. 8;
Figure 11 is the contrast schematic diagram of four-way change-over valve suffered surface friction drag in commutation process of four-way change-over valve of the present invention and prior art.
In Fig. 1-3:
1 ' slide block, 2 ' connecting rod, 21 ' bayonet socket, 3 ' valve seat
In Fig. 4-11:
1 slide block, 11 boss, 2 connecting rods, 21 receiving cavities, 211 chamferings, 22 side levers, 23 cavitys, 3 valve seats
Embodiment
Core of the present invention is to provide a kind of four-way change-over valve, and the frictional force in its commutation process is less, switches reliability higher.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 4, Fig. 4 is the cross-sectional view of four-way change-over valve provided by the present invention in a kind of embodiment.
Four-way change-over valve of the present invention comprises slide block 1, connecting rod 2 and valve seat 3, valve seat 3 offers E, S, C tri-working holes, valve body is provided with the high-pressure mouth D be communicated with hyperbaric chamber, under the effect of hyperbaric chamber, slide block 1 compresses hermetically and is fitted on valve seat 3, the two end part of slide block 1 respectively with the unlatching (ON) of four-way change-over valve and close (OFF) corresponding; Connecting rod 2 slidably reciprocates between opening end and shutdown side for promoting slide block 1, to realize the commutation of four-way change-over valve.
It should be noted that, upper and lower, left and right herein and front and back position word are with slide block 1 for reference, and the glide direction of definition slide block 1 is described fore-and-aft direction, holds a corresponding side to be front with unlatching (ON), correspondingly, a corresponding side is held to be rear with closedown (OFF); The direction vertical with the slip surface of slide block 1 is described above-below direction, and the slip surface of described slide block 1 is the surface of contact of slide block 1 and valve seat 3, and the direction being pointed to slide block 1 by valve seat 3 is top, and the direction contrary with described top is below; In described slip surface or in the plane parallel with described slip surface, the direction perpendicular with described fore-and-aft direction is described left and right directions.
Described connecting rod 2 has holder and carries a structure, and slide block 1 has and bears structure, and structure is carried in described holder and described structure of bearing cooperatively interacts; Promote in the process of slide block 1 slip at connecting rod 2, structure is carried in described holder can bear the component of structure generation for supporting slider 1 to described, this component perpendicular to slide block 1 slip surface upwards, to reduce the positive pressure that slide block 1 acts on valve seat 3, and then the surface friction drag f that reduction slide block 1 is subject in sliding process.
Can expect, because slide block 1 is pressed on valve seat 3 under the pressure effect of hyperbaric chamber, according to the interaction principle of power, valve seat 3 pairs of slide blocks 1 have certain support force, for reducing the support force of valve seat 3 pairs of slide blocks 1, the present invention arranges corresponding holder and carries structure and bear structure on slide block 1 and connecting rod 2, when connecting rod 2 pairs of slide blocks 1 promote, described holder is carried structure and can be produced perpendicular to slip surface component upwards bearing structure, thus partial offset slide block 1 is applied to the pressure on valve seat 3, the surface friction drag that final reduction slide block 1 is subject in sliding process, the noise produced in the shake of effective alleviation slide block 1 and sliding process, improve reliability and the stationarity of commutation.
In a kind of embodiment, the carrying inclined-plane that structure can be set to be obliquely installed relative to slip surface is carried in described holder, described bear that structure can be set to be obliquely installed down bear inclined-plane, and described in bear inclined-plane and can fit with corresponding described carrying inclined-plane, then when connecting rod 2 promote slide block 1 slide time, described carrying inclined-plane is supported and corresponding with it is born inclined-plane, connecting rod 2 pairs of slide blocks 1 produce and bear inclined-plane directed force F obliquely perpendicular to described, directed force F can decomposite the support force to slide block 1, to reach the effect reducing surface friction drag f suffered by slide block 1.
In this kind of mode of execution, slide block 1 can bear inclined-plane and carries inclined-plane with connecting rod 2 forward-and-rearward and abut respectively by its forward-and-rearward, and both can cooperatively interact better, the reliability that both raisings connect, and slide so that connecting rod 2 promotes slide block 1 reposefully; On the other hand, wholely bear on inclined-plane because connecting rod 2 and the point of contact of slide block 1 are comparatively evenly distributed in, then the support force of connecting rod 2 pairs of slide blocks 1 and Driving force distribution comparatively even, the sliding stability to slide block 1 can be coordinated preferably, effectively prevent shake and noise.
Those skilled in the art should expect, described holder is carried structure and is born structure and is not limited in above-mentioned carrying inclined-plane and bears inclined-plane, such as, structure is carried in described holder can be set to curved end or sphere curved surface, this curved end or sphere curved surface projecting upward relative to described slip surface, described structure of bearing is can form with described curved end or sphere curved surface the arbitrary shape structure that point cantact, linear contact lay or face contact, then connecting rod 2 contact described holder carry structure function in slide block 1 time, all can produce perpendicular to described slip surface component upwards; In like manner, structure is carried in described holder can also be set to other irregular connecting end surfaces, as long as this connecting end surface entirety has the trend upwards extended relative to described slip surface, just can produce perpendicular to described slip surface component upwards.
Can expect, described holder is carried in structure and bearing structure, and at least one is set to the structure tilted relative to slip surface, and the point of contact due to both is in the structure of this inclination, will inevitably produce perpendicular to slip surface component upwards; That is, described holder is carried structure and born at least one in structure has the structure tilted relative to slip surface, and the structure of another one can arbitrarily be arranged; Certainly, the reliability of connection can be improved when both being set to leaning structure bonded to each other, but this and not necessarily, every can make to hold in the palm carry structure and produce structure perpendicular to slip surface component upwards to bearing structure, all belong to protection scope of the present invention.
On the basis of the above, described carrying inclined-plane and the described inclined-plane that bears all can be arranged between 45 degree ~ 80 degree relative to the angle of inclination of described slip surface.
The setting of above-mentioned angle can take into account promotion and the support demand of connecting rod 2 pairs of slide blocks 1 preferably, while guarantee effectively promotes slide block 1, increases as much as possible perpendicular to slip surface component upwards.
Please refer to Fig. 5-Figure 10, Fig. 5 is the perspective view of a kind of set-up mode of connecting rod provided by the present invention; Fig. 6 is the side view of connecting rod shown in Fig. 5; Fig. 7 is the plan view of connecting rod shown in Fig. 5; Fig. 8 is the perspective view of a kind of set-up mode of slide block provided by the present invention; Fig. 9 is the plan view of slide block shown in Fig. 8; Figure 10 is the side view of slide block shown in Fig. 8.
Particularly, the left and right sides of slide block 1 can all arrange boss 11, and the left and right sides of connecting rod 2 arranges receiving cavity 21 accordingly, and the anteroposterior dimension of receiving cavity 21 is slightly larger than boss 11; Front and back two inwall of receiving cavity 21 is formed described in two and carries inclined-plane, front and back two outer wall of boss 11 is formed described in corresponding two and bears inclined-plane, as shown in figs, boss 11 carries inclined-plane with the rear side bearing inclined-plane and receiving cavity 21 on rear side of it and is fitted and connected, and forms the four-way change-over valve shown in Fig. 4.
The anteroposterior dimension of boss 11 is slightly less than the receiving cavity 21 corresponding with it, when connecting rod 2 promote slide block 1 slide time, boss 11 be in rear side bear inclined-plane or be in front side bear inclined-plane be in receiving cavity 21 respectively rear side carrying inclined-plane or be in front side carrying inclined-plane lean, and the end face that both are in front side is separated, can effectively prevent boss 11 stuck in receiving cavity 21, avoid causing whole slide block 1 to be maked somebody a mere figurehead on valve seat 3 because boss 11 is stuck, to ensure the sealing reliability of valve seat 3 and slide block 1; Simultaneously, because slide block 1 is adopted made of plastic usually, and four-way change-over valve may be subject to the interference of external environment in the process used, cause slide block 1 to produce heat to rise distortion, boss 11 and the difference in size of receiving cavity 21 can also give boss 11 certain deformation space, prevent boss 11 excessive deformation from impacting connecting rod 2 and valve seat 3.
Wherein, the comparison of the anteroposterior dimension of receiving cavity 21 and the anteroposterior dimension of boss 11 take same plane as reference, described plane parallel is in described slip surface, if the length being in above-below direction to be assumed to height, then the comparison of the anteroposterior dimension of receiving cavity 21 and boss 11 refers to the comparison of the anteroposterior dimension be on sustained height.
On the basis of the above, the size of the upper edge fore-and-aft direction of boss 11 can be less than or equal to the lower ending opening of receiving cavity 21.Bear inclined-plane described in the front and back two outer wall formation of boss 11, and two bear inclined-plane relative to described slip surface towards having a down dip, then the top of boss 11 is its longest edge, it is below its most minor face, accordingly, the bore of the lower ending opening of receiving cavity 21 is minimum, and the bore of upper end open is maximum; When the top of boss 11 is not more than the lower ending opening of receiving cavity 21, boss 11 can be pushed to receiving cavity 21 from the lower end of receiving cavity 21, thus realizes the connection of connecting rod 2 and slide block 1; When connection removed by needs, only boss 11 need be released receiving cavity 21 from top to bottom, the process of whole installation and removal is comparatively simple.
Meanwhile, the upper end open of receiving cavity 21 and the inwall at lower ending opening place all outwards can bend setting, to form chamfering 211; The setting of chamfering 211 can reduce the resistance be subject to when boss 11 pushes or release receiving cavity 21, reduces the damage to both.
One more preferred embodiment in, the left and right sides of slide block 1 all can arrange the boss 11 of at least two front and back distributions, and correspondingly, the left and right sides of connecting rod 2 arranges the same number of receiving cavity 21, and each receiving cavity 21 also distributes along the longitudinal direction, as shown in Figure 5-10.
At fore-and-aft direction distribution boss 11 and receiving cavity 21 respectively at described slide block 1 and connecting rod 2, the reliability that both connect at fore-and-aft direction can be improved; What is more important, in the process that slide block 1 commutates at slide anteroposterior, before and after it, both sides all can effectively be located, so that slide block 1 tilts forward and back in the process of commutation.
More preferably, slide block 1 can arrange even number boss 11, even number boss 11 can be symmetrically distributed in fore-and-aft direction about the center line P of slide block 1, as shown in Figure 9, then with center line P for boundary, slide block 1 glide direction is divided into former and later two parts, and two parts are provided with boss 11 on a 50-50 basis, to ensure the stability of slide block 1 at sliding process and the connection reliability of slide block 1 and valve seat 3.
Four-way change-over valve of the present invention mentioned above can be further improved.
Can expect, receiving cavity 21 can be set to symplex structure, and its carrying inclined-plane being in fore-and-aft direction can be symmetrical arranged about the medial axis M of receiving cavity 21 at fore-and-aft direction, as shown in Figure 6; Correspondingly, boss 11 also can be set to symplex structure, as shown in Figure 10, boss 11 with the medial axis O on its fore-and-aft direction for axle, be set to front and back symplex structure, namely the angle of inclination of bearing inclined-plane of boss 11 fore-and-aft direction is identical, true dip direction contrary, and the cross section of boss 11 can be arranged in inverted isosceles trapezoid; Certainly, receiving cavity 21 and boss 11 also can be set to non-symmetry structure, and according to the needs of commutation, both can arrange different angles of inclination at fore-and-aft direction.
Wherein, form angle theta between the inwall of both sides and slip surface before and after receiving cavity 21, as shown in Figure 6, form angle α between the front and back outer wall of boss 11 and slip surface, angle α and angle theta all can be arranged on 45 degree ~ 80 degree; Obviously, identical or different values can be got in the front inner wall of receiving cavity 21 and the angle of inclination of rear side inwall in above-mentioned angular range, in like manner, the front side outer wall of boss 11 and the angle of inclination of rear side outer wall also can be identical or different, but receiving cavity 21 and the corresponding side wall surface of boss 11 should adopt identical angle of inclination to arrange.
As shown in figure 5 and figure 7, connecting rod 2 can comprise about two side levers be oppositely arranged 22, side lever 22 is for being connected with slide block 1, two side levers 22 are oppositely arranged formation one cavity 23, to be connected with corresponding side lever 22 with its left and right sides wall after slide block 1 stretches into cavity 23, form the four-way change-over valve shown in Fig. 4.
Please refer to Figure 11 and composition graphs 3 and Figure 10, Figure 11 are the contrast schematic diagram of the four-way change-over valve of four-way change-over valve of the present invention and prior art suffered surface friction drag in commutation process.
As shown in Figure 10, when the carrying inclined-plane on rear side of receiving cavity 21 and the carrying inclined-plane on rear side of boss 11 against time, both forming surface contacts, connecting rod 2 pairs of slide blocks 1 produce the surface of contact directed force F obliquely perpendicular to both, and this directed force F can be decomposed into perpendicular to slip surface support force the F1 upwards and slip surface thrust F2 being forward parallel to slide block 1; Generation due to support force F1 counteracts the overall positive pressure acted on by slide block 1 on valve seat 3 of four-way change-over valve, also just correspondingly reduces the surface friction drag f be subject in slide block 1 sliding process; When surface friction drag f reduces, under the effect of thrust F2, four-way change-over valve successfully can be switched to opening state by closed condition by slide block 1, as shown in Figure 4, or is switched to closed condition by opening state.
When described carrying inclined-plane with bear inclined-plane abut fit time, the contact of both forming surfaces, then the directed force F of connecting rod 2 pairs of slide blocks 1 is comparatively evenly distributed in and wholely bears on inclined-plane, and directed force F is comparatively stable at the component F1 of glide direction, thus promote slide block 1 steadily movement, complete commutation smoothly; Simultaneously, directed force F also can decompose generation perpendicular to slip surface support force F1 upwards, this support force F1 is distributed in and wholely bears on inclined-plane, the support of continuous and effective can be produced to slide block 1, thus reduce the positive pressure that slide block 1 acts on valve seat 3 largely, to reduce the surface friction drag f that it is subject to, avoid producing shake and noise.
With slide block 1 in commutation process suffered surface friction drag f for y coordinate, with slide block 1 movement travel s for abscissa draws Figure 11; Wherein, solid line represents the surface friction drag curve of slide block 1 of the present invention, the surface friction drag curve of slide block 1 ' in represented by dotted arrows prior art.
Slide block 1 of the present invention is subject to from connecting rod 2 directed force F obliquely when commutating; and this directed force F decomposites perpendicular to slip surface support force F1 upwards; and in prior art; the reversing force that connecting rod 2 ' acts on slide block 1 ' is parallel to its slip surface; the positive pressure that slide block 1 ' acts on valve seat 3 ' cannot be shared; therefore the surface friction drag f suffered by slide block 1 of the present invention is less than the surface friction drag f ' in prior art suffered by slide block 1 ', as shown in figure 11.
Therefore, four-way change-over valve of the present invention has and switches the advantage such as non-jitter, noise in higher, the commutation process of reliability.
Above four-way change-over valve provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (8)
1. a four-way change-over valve, comprise and be pressed on the slide block (1) on valve seat (3) and the connecting rod (2) for promoting described slide block (1), it is characterized in that, described connecting rod (2) has holder and carries structure, described slide block (1) have to carry with described holder that structure matches bear structure, promote in the process that described slide block (1) slides at described connecting rod (2), described holder is carried structure and is produced the slip surface perpendicular to described slide block (1) and component upwards to described structure of bearing.
2. four-way change-over valve as claimed in claim 1, it is characterized in that, it is the carrying inclined-plane be obliquely installed upward relative to described slip surface that structure is carried in described holder, described bearing structure be obliquely installed down and can fit with corresponding described carrying inclined-plane bear inclined-plane.
3. four-way change-over valve as claimed in claim 2, it is characterized in that, described carrying inclined-plane and the described inclined-plane that bears all are arranged between 45 degree ~ 80 degree relative to the angle of inclination of described slip surface.
4. four-way change-over valve as claimed in claim 2, it is characterized in that, the left and right sides of described slide block (1) is equipped with described boss (11), and the left and right sides of described connecting rod (2) is equipped with the receiving cavity (21) of fore-and-aft direction size slightly larger than described boss (11); Front and back two inwall of described receiving cavity (21) is formed described in two and carries inclined-plane, and front and back two outer wall of described boss (11) is formed described in corresponding two and bears inclined-plane.
5. four-way change-over valve as claimed in claim 4, it is characterized in that, the top of described boss (11) is not more than the size of lower ending opening at fore-and-aft direction of described receiving cavity (21) in the size of fore-and-aft direction.
6. four-way change-over valve as claimed in claim 5, it is characterized in that, the upper end open of described receiving cavity (21) and the inwall at lower ending opening place are all outwards bent to form chamfering (211).
7. the four-way change-over valve as described in any one of claim 4-6, it is characterized in that, the left and right sides of described slide block (1) is equipped with the boss (11) of at least two front and back distributions, correspondingly, the left and right sides of described connecting rod (2) is equipped with identical number and the described receiving cavity (21) of front and back distribution.
8. four-way change-over valve as claimed in claim 7, it is characterized in that, described slide block (1) is provided with boss described in even number (11), and boss described in even number (11) is symmetrically distributed in its fore-and-aft direction about the center line of described slide block (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310330835.9A CN104344016B (en) | 2013-07-31 | 2013-07-31 | Four-way change-over valve |
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| CN201310330835.9A CN104344016B (en) | 2013-07-31 | 2013-07-31 | Four-way change-over valve |
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| CN104344016A true CN104344016A (en) | 2015-02-11 |
| CN104344016B CN104344016B (en) | 2016-08-10 |
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| CN201310330835.9A Active CN104344016B (en) | 2013-07-31 | 2013-07-31 | Four-way change-over valve |
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| CN106609865A (en) * | 2015-10-26 | 2017-05-03 | 浙江三花制冷集团有限公司 | Switching valve and pilot type switching valve provided with same |
| CN114542757A (en) * | 2020-11-24 | 2022-05-27 | 盾安环境技术有限公司 | Reversing valve and refrigerating system |
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| CN114542757B (en) * | 2020-11-24 | 2024-03-22 | 盾安环境技术有限公司 | Reversing valve and refrigerating system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104344016B (en) | 2016-08-10 |
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Effective date of registration: 20220822 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: 312500 xialiquan village, Qixing street, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |