CN104074995A - Bidirectional electromagnetic valve - Google Patents
Bidirectional electromagnetic valve Download PDFInfo
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- CN104074995A CN104074995A CN201310106642.5A CN201310106642A CN104074995A CN 104074995 A CN104074995 A CN 104074995A CN 201310106642 A CN201310106642 A CN 201310106642A CN 104074995 A CN104074995 A CN 104074995A
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- valve body
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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
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/24—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an electromagnetically-operated valve, e.g. for washing machines
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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
- F16K27/00—Construction of housing; Use of materials therefor
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a bidirectional electromagnetic valve. A piston is arranged in a valve cavity; a first connector and a second connector are arranged on a main valve body; the bidirectional electromagnetic valve is provided with a first flowing channel and a second flowing channel which are respectively connected with the first connector and the second connector, so that refrigerant can flow out of a piston cavity; the first flowing channel and the second flowing channel are arranged on the main valve body; the main valve body is provided with a pilot valve flowing channel; the piston cavity is connected with a pilot valve opening in a pilot valve body through the pilot valve flowing channel; and a pilot valve head of the pilot valve body moves to open or close the pilot valve opening, so that the first flowing channel and the second flowing channel are connected with or disconnected from the piston cavity. The stroke of a piston of the electromagnetic valve can be separated from the stroke of the pilot valve head, the valve opening capability of the valve body is not affected, the height of the electromagnetic valve is not required to be increased, and on that basis, a coil is not required to be enlarged. The state of the main valve body is stable, the pilot valve head and the main valve body are not easily misplaced, complicated guiding pieces are not required to be arranged on the main valve body or the pilot valve head, the structure is simplified obviously, and the machining difficulty and the cost of an assembly process are low.
Description
Technical field
The present invention relates to valve body technical field, particularly a kind of bidirectional electromagnetic valve.
Background technique
General solenoid valve, due to the restriction of structure, can only one-way flow, cut-off; In conventional system, many times need to be used in conjunction with one-way valve.And in heat pump, refrigerant is contrary in the flow direction of freezing, heat process, two the single-pass solenoid valves that need to be installed in series are realized twocouese circulation, cause system architecture complexity, and reliability is lower, and cost is also higher, for this reason, need to design bidirectional electromagnetic valve.
Please refer to Fig. 1-2, Fig. 1 is a kind of typical bidirectional electromagnetic valve structural representation, and Fig. 2 is the structural representation of bidirectional electromagnetic valve pilot valve head and moving iron core in Fig. 1.
This bidirectional electromagnetic valve is straight line type solenoid valve, and it comprises main valve body setting up and down 1 and pilot valve body, is provided with coil 70, the static iron core matching and moving iron core 40 in pilot valve body, and with the fixing pilot valve head 50 of moving iron core 40; In the valve pocket of main valve body 1, be provided with piston 30, the upside at piston 30 after assembling piston 30 forms piston cavity; Main valve body 1 is also provided with first interface 20a and the second interface 20b, connects respectively first interface pipe, the second mouthpiece.As shown in Figure 1, while moving on piston 30, leave valve port 1b, make first interface 20a and the second interface 20b conducting.Pilot valve head 50 connects as one with moving iron core 40, and in the time that the coil 70 of bidirectional electromagnetic valve is switched on, moving iron core 40 drives and on pilot valve head 50, moves away piston 30 under magnetic force; When power-off, spring 90 resets, and moving iron core 40 promotes pilot valve head 50 and moves down and push against piston 30, with close port 1b.
Piston 30 is provided with first piston runner 30k and the second piston runner 30d, and first piston runner 30k is communicated with first interface 20a by the inlet channel 30b arranging on piston 30, and the second piston runner 30d is communicated with the second interface 20b by one-way valve 30g.Pilot valve head 50 is provided with the first check valve 30e and the second check valve 30f, and as shown in Figure 1, the first check valve core 30a and the second check valve core 30c are inserted in the jack of pilot valve head 50, blocks first piston runner 30k and the second piston runner 30d to aim at respectively.The working principle of this bidirectional electromagnetic valve is as follows:
A, in the time that refrigerant enters from first interface 20a
Coil 70 power-off:
Pilot valve head 50 is in the position shown in Fig. 1, and now, pilot valve head 50 is pushed against valve port 1b place by piston 30 under spring 90 effects, and first interface 20a cannot directly be communicated with the second interface 20b; Refrigerant path is now: first interface 20a-inlet channel 30b-first piston runner 30k-backs down the piston cavity of the first check valve 30e-piston 30 upsides.Now, under the effect of high pressure refrigerant, the second check valve 30f closes, and refrigerant cannot flow to the second interface 2b through the second piston runner 30d.First interface 20a and the second interface 20b disconnect, and bidirectional electromagnetic valve is closed.
Coil 70 is switched on:
The interior generation of coil 70 magnetic field, moving iron core 40 pulls pilot valve head 50 near static iron core, and the first check valve 30e and the second check valve 30f depart from first piston runner 30k, the second piston runner 30d.Refrigerant path is now: first interface 20a-inlet channel 30b-first piston runner 30k-the second piston runner 30d-backs down one-way valve 30g-the second interface 20b.Because the sectional area of inlet channel 30b is less than the second piston runner 30d sectional area, the refrigerant volume that flows into piston 30 upside piston cavity is less than the refrigerant volume of outflow, and the refrigerant pressure of piston 30 upsides is reduced.So, under the differential pressure action that piston 30 forms at upper and lower sides, moving upward and depart from valve port 1b, first interface 20a and the second interface 20b are directly communicated with, and bidirectional electromagnetic valve is opened.
B, in the time that refrigerant enters from the second interface 20b
Coil 70 power-off:
Now the path of refrigerant is: the import aperture-the second piston runner 30d-in the second interface 20b-one-way valve 30g backs down the piston cavity of the second check valve 30f-piston 30 upsides.Now, under the effect of high pressure refrigerant, the first check valve 30e closes, and refrigerant cannot flow to first interface 2a through first piston runner 30k.First interface 20a and the second interface 20b disconnect, and bidirectional electromagnetic valve is closed.
Coil 70 is switched on:
As mentioned above, on pilot valve head 50, move, now the path of refrigerant is: the import aperture-the second piston runner 30d-first piston runner 30k-inlet channel 30b-first interface 20a of the second interface 20b-one-way valve 30g.Because import aperture sectional area is less than inlet channel 30b sectional area, the refrigerant volume that flows into piston 30 upsides is few, and the refrigerant volume of outflow is large, and the refrigerant pressure of piston 30 upsides is reduced.So, under the differential pressure action that piston 30 forms at upper and lower sides, moving upward and depart from valve port 1b, first interface 20a and the second interface 20b are directly communicated with, and bidirectional electromagnetic valve is opened.
From the working principle of above-mentioned bidirectional electromagnetic valve, when design, need to make the sectional area of the import aperture (refrigerant enters) of passage (refrigerant goes out), the one-way valve 30g at inlet channel 30b (refrigerant into and out of), two piston runners, one-way valve 30g place meet a certain size relation, ensure that pressure reduction can form.In fact, in Fig. 1, the first piston runner 30k flowing out for refrigerant with the inlet channel 30b flowing into for refrigerant in same stream, the second piston runner 30d flowing out for refrigerant with the import aperture of the one-way valve 30g entering for refrigerant also in same stream.
There is following technological deficiency in above-mentioned bidirectional electromagnetic valve:
The first, in the time that solenoid valve has larger traffic demand, its valve port 1b can increase, and correspondingly, piston 30 strokes need to increase, pilot valve head 50 strokes need synchronous increasing, correspondingly, the stroke of moving iron core 40 also needs to increase, and along with moving the increase of iron core 40 strokes, 70 the suction-combining forces that can provide of coil reduce, the valve ability of opening of valve body 1 sharply declines, and in addition, the height of solenoid valve also can increase; If coil 70 strengthens, can bring again the series of problems such as power is large, temperature rise is high, the volume of solenoid valve also can increase.
The second, in the twocouese switching process of solenoid valve, the first check valve core 30a and the second check valve core 30c must aim at first piston runner 30k and the second piston runner 30d all the time, can not produce radial displacement, otherwise, the sealing function of two check valve cores lost efficacy, and caused bidirectional electromagnetic valve normally to close or to open.For avoiding this problem, on pilot valve head 50, be provided with two guide rods 60, piston 30 is provided with pilot hole corresponding to position, can understand in conjunction with Fig. 2, and guide rod 60 can be inserted in pilot hole all the time, to ensure that check valve spool aims at corresponding piston runner all the time.This causes the structure of pilot valve head 50 comparatively complicated, and difficulty of processing is large, and assembly technology cost is higher, and nonetheless, control accuracy is also still not ideal.
In view of this, how opening valve ability, do not change under the prerequisite of size of stitch not affecting solenoid valve, meet the large traffic demand of bidirectional electromagnetic valve, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
For solving the problems of the technologies described above, object of the present invention is for providing a kind of linear bidirectional electromagnetic valve, this solenoid valve makes the stroke of piston separate with the stroke of pilot valve head, therefore open valve ability, do not change under the prerequisite of size of stitch not affecting solenoid valve, has met large traffic demand.
Bidirectional electromagnetic valve provided by the invention, has main valve body, pilot valve body, in the valve pocket that described main valve body forms, is provided with piston and forms piston cavity, and described main valve body is provided with by the first interface of described piston control break-make and the second interface; Described bidirectional electromagnetic valve also has first flow and the second runner, and the two is communicated with respectively described first interface, described the second interface, flow out for refrigerant,
Described first flow and described the second runner are all located on described main valve body;
And described main valve body is provided with pilot valve runner, described piston cavity is communicated with the pilot valve mouth on described pilot valve body by described pilot valve runner;
The pilot valve head of described pilot valve body moves and opens and closes described pilot valve mouth, to be switched on or switched off described first flow, described the second runner with described piston cavity.
This solenoid valve is communicated with first flow, second runner of the same first interface of piston cavity, the second interface while unlatching, be arranged on main valve body, correspondingly, pilot valve head only need coordinate with main valve body, and no longer coordinate with piston, the stroke of piston is separated with the stroke of pilot valve head.Therefore, the solenoid valve of this structure has following technological merit:
The first, in the time that solenoid valve has larger traffic demand, valve port increases, the stroke of piston increases, but the stroke of moving iron core is without increase, therefore can not affect the valve ability of holding of valve body, the height of solenoid valve is also without increase, based on this, also just without strengthen coil, thereby overcome the existing technological deficiency of technological scheme in background technique.
Because pilot valve head separates with piston, no longer need between pilot valve head and moving iron core, design cavity and the spring that is arranged in cavity as shown in Figure 1, make the structure of pilot valve head comparatively simple.
The second, pilot valve head and main valve body cooperating, main valve body is fixed component, in stable condition, in the twocouese switching process of solenoid valve, pilot valve head and main valve body are difficult for misplacing, and compared to background technique, the performance of closing of pilot valve mouth is not vulnerable to dislocation impact.Therefore, on main valve body and pilot valve head, do not need loaded down with trivial details guiding element is set, compared to background technique, it is lower that obvious structure is able to simplification, difficulty of processing and assembly technology cost, and control accuracy can meet the demands.
Preferably, described pilot valve runner is built in described main valve body.
When pilot valve runner is built in main valve body, can reduce main valve body volume on the one hand, on the other hand, also improve two-way valve resistance to shock.
Preferably, bidirectional electromagnetic valve has pilot valve chamber, and described piston cavity is communicated with described pilot valve chamber by described pilot valve runner; When described pilot valve mouth is opened, described first flow and described the second runner are communicated with described piston cavity by described pilot valve chamber.
Arrange behind pilot valve chamber, the annexation of pilot valve runner and two runners and pilot valve mouth is easier to realize, and is convenient to actual processing.
Preferably, described first flow is the outer pipeline of being located at the externally connected pipe on described main valve body.
When first flow is externally connected pipe pipeline, only need built-in second runner on main valve body, in order to avoid add man-hour, two runners are interfered mutually, thereby reduce difficulty of processing.
Preferably, described first interface is located at the sidewall of described main valve body, and described the second interface is located at one end that valve port is set on described main valve body.
First interface and the second interface so design, and are convenient to piston control break-make.
Preferably, described pilot valve body is arranged at the sidewall of described main valve body, and corresponding to the position of described the second interface.
So, the second shorter runner can be communicated with pilot valve chamber and the second interface.
Preferably, described pilot valve runner is along longitudinal setting of described main valve body.
The pilot valve runner longitudinally arranging and piston cavity to be connected stroke the shortest, while driving valve, make the high pressure refrigerant that enters piston cavity can enter rapidly pilot valve chamber, the stepping of going forward side by side enters first flow or the second runner, raising solenoid valve speed of response.
Preferably, bidirectional electromagnetic valve has a described pilot valve mouth; And in described first flow and described the second runner, be equipped with one-way valve, with extremely extremely described the second interface of described first interface, described pilot valve mouth of pilot valve mouth described in difference conducting.
By the break-make of pilot valve mouth control first flow, the second runner and a piston cavity, be easy to control, and structure is simplified.
Preferably, the moving iron core arranging in described pilot valve body is described pilot valve head.
Moving iron core serves as pilot valve head, makes the structure of whole pilot valve body very simple, and shared volume is also less.
Preferably, described main valve body comprises the valve seat of tubular setting and is positioned in the valve gap of described valve seat one end.
The upper valve body of end cap shape takies less volume, only need possess the volume that two upper runners are set, and is convenient to install; And, mainly form piston cavity by lower valve body, be convenient to grasp effective assembling of piston.Sealing between piston and valve wall also can be guaranteed.
Brief description of the drawings
Fig. 1 is a kind of typical bidirectional electromagnetic valve structural representation;
Fig. 2 is the structural representation of bidirectional electromagnetic valve pilot valve head and moving iron core in Fig. 1;
Fig. 3 is bidirectional electromagnetic valve that invention provides the first embodiment's axial sectional view;
Fig. 4 is the perspective view of Fig. 3, not shown pilot valve body;
Fig. 5 is the partial sectional view of Fig. 4, analyses and observe externally connected pipe, and pilot valve body is also shown;
Fig. 6 is that the A-A of Fig. 3 is to sectional view.
In Fig. 1-2:
1 valve body, 1b valve port, 20b the second interface, 20a first interface, 30 pistons, 30b inlet channel, 30e the first check valve, 30f the second check valve, 30a the first check valve core, 30c the second check valve core, 30k first piston runner, 30d the second piston runner, 30g one-way valve, 40 moving iron cores, 50 pilot valve heads, 60 guide rods, 70 coils, 90 springs
In Fig. 3-6: valve chamber, 216 first one-way valves, 215 second one-way valves, 22 valve gaps, 3 pistons, 3a import equalizing orifice, 3b import one-way valve, 4 piston cavity, 5 externally connected pipe before 1 pilot valve body, 11 pilot valve heads, 111 steel balls, 11a pilot valve chamber, 12 coils, 13 static iron cores, 14 pilot valve springs, 2 main valve bodies, 2-1 first flow, 2-2 the second runner, 2a first interface, 2b the second interface, 21 valve seats, 21d pilot valve runner, 2f
Embodiment
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 3-6, Fig. 3 is bidirectional electromagnetic valve that invention provides the first embodiment's axial sectional view; Fig. 4 is the perspective view of Fig. 3, not shown pilot valve body; Fig. 5 is the partial sectional view of Fig. 4, analyses and observe externally connected pipe, and pilot valve body is also shown; Fig. 6 is that the A-A of Fig. 3 is to sectional view.
This bidirectional electromagnetic valve, has main valve body 2, pilot valve body 11, is provided with piston 3 in the valve pocket that main valve body 2 forms, and forms piston cavity 4.Main valve body 2 is provided with first interface 2a and the second interface 2b, and two interfaces are by the surge motion control break-make of piston 3, as shown in Figure 3, after piston 3 moves to right, first interface 2a and the second directly conducting of interface 2b.Taking Fig. 3 as visual angle, piston cavity 4 is the cavity on piston 3 right sides equally, and in the time that refrigerant is positioned at piston cavity 4, piston 3 is subject to High Pressure and closes; In piston cavity 4, be also provided with spring, the reposition force of spring makes piston 3 in the time not being subject to other external force, push against the valve port 2c of bidirectional electromagnetic valve.
The static iron core 13 that be provided with coil 12 in pilot valve body 1, matches and moving iron core, the moving iron core in this embodiment is pilot valve head 11.When coil 12 is switched on, static iron core 13 and the 11 phase adhesives of pilot valve head, when power-off, under pilot valve spring 14 reset responses, the two is separated.
In order to realize two-way on-off function, this solenoid valve has the first flow 2-1 (Fig. 5) and the second runner 2-2 (Fig. 3) that flow out piston cavity 4 for refrigerant.
First flow 2-1 and the second runner 2-2 are communicated with respectively piston cavity 4 with first interface 2a, the second interface 2b in the time that pilot valve mouth is opened, can understand with reference to background technique, in the time of opens solenoid valve, pilot valve head 11 moves under coil 12 magnetic forces, pilot valve mouth is opened, thereby make piston cavity 4 be communicated with first interface 2a, the second interface 2b by first flow 2-1 or the second runner 2-2, to both sides form pressure reduction at piston Shang Xia 3, open valve port 2c.Can expect, in the time that design refrigerant enters runner, should make the sectional area size that enters runner that enters piston cavity 4 for refrigerant coordinate the rear demand that forms pressure reduction that meets with first flow 2-1, the second runner 2-2, can understand with reference to background technique and following each embodiment.
In the present embodiment, on solenoid valve, be all located on main valve body 2 for first flow 2-1 and the second runner 2-2 of refrigerant outflow piston cavity 4, two runners can be built in main valve body 2, are located at the entity inside of main valve body 2, also can be placed on main valve body 2, be connected in the outside of main valve body 2." built-in " as herein described implication is identical, is all the entity inside that is arranged at main valve body 2.
In addition, be also provided with pilot valve runner 21d on main valve body 2, in like manner, pilot valve runner 21d can be built in main valve body 2 or be located at its outside.Piston cavity 4 is communicated with the pilot valve chamber 11a of bidirectional electromagnetic valve by pilot valve runner 21d, pilot valve chamber 11a and piston cavity 4 keep being communicated with, and in this embodiment, pilot valve chamber 11a is the cavity forming after pilot valve body 1 and main valve body 2 combine.Pilot valve head 11 moves the pilot valve mouth that can open and close pilot valve chamber 11a, as shown in Figure 3, when coil 12 is switched on, moves and open pilot valve mouth on pilot valve head 11; When power-off, pilot valve head 11 is blocked pilot valve mouth.For the sealing that ensures that pilot valve mouth is closed, the end of pilot valve head 11 can adopt the steel ball 111 shown in figure, certainly, by the end of pilot valve head 11 be designed to taper, cone table shape is also fine.
When pilot valve mouth is opened, pilot valve chamber 11a and first flow 2-1, the second runner 2-2 can be connected, when pilot valve mouth is closed, pilot valve chamber 11a and first flow 2-1, the second runner 2-2 can be disconnected.Because pilot valve chamber 11a communicates with piston cavity 4, correspondingly, the keying of pilot valve mouth has also just realized the break-make of piston cavity 4 with first flow 2-1, the second runner 2-2.
In this embodiment, first flow 2-1, the second runner 2-2 of piston cavity 4 with first interface 2a, the second interface 2b will in the time that opening, solenoid valve be communicated with, be arranged on main valve body 2, correspondingly, 11, pilot valve head need coordinate with main valve body 2, and no longer coordinate with piston 3, the stroke of piston 3 is separated with the stroke of pilot valve head 11.Therefore, the solenoid valve of this structure has following technological merit:
The first, in the time that solenoid valve has larger traffic demand, valve port 2c increases, the stroke of piston 3 increases, but the stroke of moving iron core (the i.e. moving iron core of pilot valve head 11 in Fig. 3) is without increase, therefore can not affect the valve ability of holding of valve body, the height of solenoid valve is also without increase, based on this, also just without strengthen coil 12, thereby overcome the existing technological deficiency of technological scheme in background technique.
Can expect, because pilot valve head 11 separates with piston 3, no longer need between pilot valve head 11 and moving iron core, design cavity and the spring 9 that is arranged in cavity as shown in Figure 1, make the structure of pilot valve head 11 comparatively simple.And as shown in Figure 3, the moving iron core now coordinating with coil 12, static iron core 13 can serve as pilot valve head 11, make the structure of whole pilot valve body 1 very simple, shared volume is also less.Certainly, moving iron core and pilot valve head 11 being set respectively is also fine.
The second, pilot valve head 11 and main valve body 2 cooperatings, main valve body 2 is fixed component, in stable condition, in the twocouese switching process of solenoid valve, pilot valve head 11 and main valve body 2 are difficult for misplacing, and compared to background technique, the performance of closing of pilot valve mouth is not vulnerable to dislocation impact.Therefore, on main valve body 2 and pilot valve head 11, do not need loaded down with trivial details guiding element is set, compared to background technique, it is lower that obvious structure is able to simplification, difficulty of processing and assembly technology cost, and control accuracy can meet the demands.
Compared with background technique, pilot valve mouth separates with piston 3, be arranged on main valve body 2, in order to ensure that the keying of pilot valve mouth can control piston chamber 4 and the break-make of first flow 2-1, the second runner 2-2, be provided with pilot valve runner 21d, further also be provided with pilot valve chamber 11a, pilot valve chamber 11a is as the center-aisle of piston cavity 4 and two runners.In fact, pilot valve chamber 11a is not set and is also fine, pilot valve runner 21d and two runners are all connected to pilot valve mouth place and can realize equally object of the present invention.Just arrange after the 11a of pilot valve chamber, the annexation of pilot valve runner 21d and two runners and pilot valve mouth is easier to realize, and is convenient to actual processing.
From the working principle of bidirectional electromagnetic valve, when coil 12 is switched on, first flow 2-1 and the second runner 2-2 need conducting piston cavity 4 with first interface 2a, the second interface 2b, accordingly, can make multiple design to first flow 2-1, the second runner 2-2, two interfaces and pilot valve mouth etc.
Please continue to refer to Fig. 3-6, in this embodiment, first flow 2-1 is the pipeline that is placed on the externally connected pipe 5 of main valve body 2, and the second runner 2-2 is built in main valve body 2, and two runner difference one-way conduction pilot valve mouths are to first interface 2a, pilot valve mouth to the second interface 2b.Can find out, in first flow 2-1, be provided with the first one-way valve 216 (Fig. 5), between the second runner 2-2 and pilot valve mouth, be provided with the second one-way valve 215, make refrigerant only can flow to first flow 2-1 and the second runner 2-2 by self-conductance valve port.
Now, the entering runner and still can be arranged on piston 3 of refrigerant, in Fig. 3, the import one-way valve 3b of one-way conduction the second interface 2b to piston cavity 4 is set on piston 3, the import equalizing orifice 3a that is communicated with piston cavity 4 and first interface 2a is also set on piston 3, and import equalizing orifice 3a, import one-way valve 3b are corresponding with the setting position of first interface 2a, the second interface 2b respectively.As shown in Figure 3.Can be communicated with first interface 2a and piston cavity 4 in order to ensure import equalizing orifice 3a, piston 3 is near forming circular groove between one end of valve port 2c and main valve body 2 inwalls, valve chamber 2f before, import equalizing orifice 3a is located at the circumferential arbitrary position of piston 3 front ends, all can realize the connection of piston cavity 4 and first interface 3a.
The working principle of this bidirectional electromagnetic valve is:
A1, refrigerant enter from first interface 2a
Coil 12 power-off:
Pilot valve head 11 is in position shown in Fig. 3, i.e. the steel ball 111 shutoff pilot valve mouths of pilot valve head 11, cannot enter the second runner 2-2 through pilot valve mouth through the high pressure refrigerant of pilot valve runner 21d inflow pilot valve chamber 11a, and piston cavity 4 and the second interface 2b disconnect.Refrigerant path is now: valve chamber 2f-import equalizing orifice 3a-piston cavity 4-pilot valve runner 21d-pilot valve chamber 11a before first interface 2a-.Another one refrigerant path is that refrigerant blocks up in the first one-way valve 216 places after first flow 2-1.Piston 3 cannot move under piston cavity 4 high pressure refrigerant effects, and first interface 2a, the second interface 2b disconnect, closed electromagnetic valve;
Coil 12 is switched on:
Pilot valve head 11 moves under magnetic force from position shown in Fig. 3, and the steel ball 111 of pilot valve head 11 departs from pilot valve mouth, and high pressure refrigerant can flow to the second runner 2-2, thereby opens the second one-way valve 215, is communicated with the second interface 2b.Refrigerant path is now: valve chamber 2f-import equalizing orifice 3a-piston cavity 4-pilot valve runner 21d-pilot valve chamber 11a-the second runner 2-2 (pushing the second one-way valve 215 open) the-second interface 2b before first interface 2a-.When design, make the sectional area of import equalizing orifice 3a be less than the sectional area of the second runner 2-2, flow into the volume that refrigerant volume in piston cavity 4 is less than outflow, piston produces pressure reduction in both sides Shang Xia 3, piston 3 moves to right, solenoid valve valve port 2c opens, and first interface 2a and the second interface 2b are directly communicated with, and solenoid valve is opened.
B1, refrigerant enter from the second interface 2b
Coil 12 power-off:
Pilot valve head 11 is in position shown in Fig. 3, as mentioned above, pilot valve mouth is closed, high pressure refrigerant cannot enter externally connected pipe 5 (entering first flow 2-1) through pilot valve mouth, be that piston cavity 4 disconnects with first interface 2a, in fact, piston cavity 4 still has certain flow with first interface 2a, flows out a certain amount of refrigerant to first interface 2a by import equalizing orifice 3a.Refrigerant path is now: the second interface 2b-import one-way valve 3b-piston cavity 4-pilot valve runner 21d-pilot valve chamber 11a.Another one refrigerant path is that refrigerant blocks up in the second one-way valve 215 places after the second interface 2b enters the second runner 2-2.Piston 3 cannot move under piston cavity 4 high pressure refrigerant effects, and first interface 2a, the second interface 2b disconnect, closed electromagnetic valve;
Coil 12 is switched on:
Pilot valve head 11 moves under magnetic force from position shown in Fig. 3, and the steel ball 111 of pilot valve head 11 departs from pilot valve mouth, and the high pressure refrigerant in the 11a of pilot valve chamber can flow to first flow 2-1 through pilot valve mouth, thereby opens the first one-way valve 216, is communicated with first interface 2a.Refrigerant path is now: the second interface 2b-piston cavity 4-pilot valve runner 21d-pilot valve chamber 11a-externally connected pipe 5 (first flow 2-1 pushes the first one-way valve 216 open)-first interface 2a.When design, make the sectional area of import one-way valve 3b runner be less than the sectional area of first flow 2-1, flow into the volume that refrigerant volume in piston cavity 4 is less than outflow, piston produces pressure reduction in both sides Shang Xia 3, piston 3 moves to left, the valve port 2c of solenoid valve opens, and first interface 2a and the second interface 2b are directly communicated with, and solenoid valve is opened.
In above-described embodiment, the one-way valve of one-way conduction first interface 2a and piston cavity 4 also can be set at import equalizing orifice 3a place, so that refrigerant is in the time that the second interface 2b enters, refrigerant can not flow to first interface 2a through import equalizing orifice 3a.Certainly, in actual applications, for current bidirectional electromagnetic valve specification, the bore of import equalizing orifice 3a is very little can reach user demand, such as 0.5mm left and right, now, relative circulation area is less, when the second interface 2b enters refrigerant, the refrigerant that is flowed directly to first interface 2a by import equalizing orifice 3a can be ignored, do not affect the start-stop performance of solenoid valve, now, in import equalizing orifice 3a, one-way valve is not set and also can.
Using designing on piston 3 as the import equalizing orifice 3a and the import one-way valve 3b that enter runner, it should be noted that above, will enter runner design and also be fine on main valve body 2.Enter runner and can be separately set on main valve body 2, also can be with the outflow runner design of refrigerant on same stream.Such as, the second runner 2-2 is designed to branch's runner, lead to piston cavity 4, this branch's runner can directly be arranged at the upper end of main valve body 2, and the one-way valve of one-way conduction the second interface 2b to piston cavity 4 is set in branch's runner; In like manner, also first flow 2-1 can be designed to branch's runner, be communicated with piston cavity 4, substitute above-mentioned import equalizing orifice 3a, certainly, in the time that first flow 2-1 is the pipeline of externally connected pipe 5, enters runner and correspondingly can be located at lateral.This type of design all can realize the object of two-way keying solenoid valve, certainly, enters runner design in the time of piston 3, makes refrigerant can flow to rapidly piston cavity 4, improves the speed of response that solenoid valve opens and closes.
Above-mentioned solenoid valve, the first interface 2a on its main valve body 2 can be located at sidewall, and the second interface 2b is located at end, and correspondingly, pilot valve body 1 is connected in the other end.First interface 2a and the second interface 2b so design, and are convenient to piston 3 and control the break-make of two interfaces.
For above-described embodiment, main valve body 2 specifically can comprise valve seat 21 and valve gap 22, as shown in Figure 3.Now, the second runner 2-2 can be arranged on valve seat 21.Pilot valve body 1 is arranged at the sidewall of main valve body 2, can be arranged at the sidewall of valve seat 21, and in Fig. 3, pilot valve body 1 is arranged at the position corresponding to the second interface 2b on valve seat 21, and now, pilot valve body 1 is arranged at the front end side wall of main valve body 2.In this embodiment, pilot valve body 1 is basically perpendicular to the sidewall of main valve body 2, forms L-type bidirectional electromagnetic valve, can expect, vertical setting is convenient to processing, and can reduce the pressure loss of corresponding runner, and certainly, out of plumb setting is also feasible.
Pilot valve body 1 is in the time of sidewall locations corresponding to the second interface 2b, and the second shorter runner 2-2 can be communicated with pilot valve chamber 11a and the second interface 2b, as shown in Figure 3.Visible, the processing of the second runner 2-2 is more simple.Be appreciated that in the time that the second runner 2-2 is set to externally connected pipe pipeline configuration, pilot valve body 1 can, in the sidewall locations corresponding to first interface 2a, so that the length of first flow 2-1 can be shortened, reduce difficulty of processing.
Now, pilot valve runner 21d can longitudinally arrange, and longitudinally arranges and can guarantee that the length of pilot valve runner 21d is the shortest, to shorten the stroke of refrigerant in pilot valve runner 21d, so that refrigerant promptly enters pilot valve chamber 11a from piston cavity 4.
Pilot valve body 1 also can be arranged at one end sidewall away from valve port 2c on main valve body 2, and now, the length of pilot valve runner 21d can shorten, and reduces the difficulty of processing of pilot valve runner 21d.
Main valve body 2 is set to valve seat 21 and the valve gap 22 of split, is convenient to assemble the parts such as the spring in piston 3, piston cavity 4; And split-type design is convenient to process required the second runner 2-2.In fact, integrated main valve body 2 is also feasible, can connect pilot valve body 1 at sidewall, one end assembling internals, and now the simplification of processing, assembly technology can be inferior to split-type design.
In above-described embodiment, by the break-make of same pilot valve mouth control first flow 2-1, the second runner 2-2 and pilot valve chamber 11a.So, break-make is easy to control, and structure can be simplified.Specifically realize like this, as shown in Figure 6, one end of externally connected pipe 5 is connected directly to the second runner 2-2, obviously, this end of externally connected pipe 5 is connected in the position between upper pilot valve mouth to the second one-way valve 215 of the second runner 2-2, be equivalent to the total part of the second runner 2-2 and first flow 2-1, to be jointly connected to pilot valve mouth, realize by same pilot valve mouth control break-make.Certainly, externally connected pipe 5 is connected directly to pilot valve mouth place and is also fine, and just, is connected to the second runner 2-2 and is easy to being equipped with of pilot valve mouth and pilot valve head 11.
It should be noted that, first flow 2-1 and the second runner 2-2 one-way conduction pilot valve mouth and first interface 2a, the second interface 2b in above-described embodiment, be during due to break-make by same pilot valve mouth control first flow 2-1, the second runner 2-2 and pilot valve chamber 11a, prevent that first flow 2-1 and the second runner 2-2 are directly communicated with.When pilot valve chamber 11a has two respectively when the pilot valve mouth corresponding with first flow 2-1, the second runner 2-2, first flow 2-1 and the second runner 2-2 are not connected, now, the first above-mentioned one-way valve 215 and the second one-way valve 216 are not set and are also fine.
In above-described embodiment, first flow 2-1 is designed to be arranged at externally connected pipe 5 pipelines on main valve body 2 outer walls, so, only needs a built-in second runner 2-2 on main valve body 2, in order to avoid add man-hour, two runners are interfered mutually, thereby reduce difficulty of processing.Can expect, it is also feasible that the second runner 2-2 is designed to externally connected pipe, and working principle is same as described above, repeats no more herein.When the second runner 2-2 is designed to externally connected pipe structure, pilot valve body 1 can preferably arrange near first interface 2a, so that the first flow 2-1 being built in valve seat 21 can arrange shorter length.In fact, first flow 2-1 and the second runner 2-2 all can be made as externally connected pipe, and just the set-up mode of an external externally connected pipe, a built-in runner makes solenoid valve possess better resistance to shock.Similarly, the pilot valve runner 21d in above-described embodiment also can take externally connected pipe structure, when pilot valve runner 21d is built in main valve body 2, can reduce main valve body 2 volumes on the one hand, on the other hand, also improves two-way valve resistance to shock.
For the various embodiments described above, pilot valve body 1, main valve body 2, first interface 2a, the second interface 2b can be positioned at same axial section, now, pilot valve body 1 is oppositely arranged with the first interface 2a that is arranged at main valve body 21 sidewalls, so, the design of solenoid valve is relatively well-balanced, and stability is better.
Above a kind of bidirectional electromagnetic valve provided by the present invention is described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.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 improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a bidirectional electromagnetic valve, there is main valve body (2), pilot valve body (1), in the valve pocket that described main valve body (2) forms, be provided with piston (3) and form piston cavity (4), described main valve body (2) is provided with first interface (2a) and the second interface (2b) of being controlled break-make by described piston (3); Described bidirectional electromagnetic valve also has first flow (2-1) and the second runner (2-2), and the two is communicated with respectively described first interface (2a), described the second interface (2b), flows out for refrigerant, it is characterized in that,
Described first flow (2-1) and described the second runner (2-2) are all located on described main valve body (2);
And described main valve body (2) is provided with pilot valve runner (2d), described piston cavity (4) is communicated with the pilot valve mouth on described pilot valve body (1) by described pilot valve runner (2d);
The described pilot valve mouth of the mobile keying of pilot valve head (11) of described pilot valve body (1), to be switched on or switched off described first flow (2-1), described the second runner (2-2) with described piston cavity (4).
2. bidirectional electromagnetic valve as claimed in claim 1, it is characterized in that, described main valve body (2) is built-in with pilot valve runner (21d), and described piston cavity (4) is communicated with the pilot valve mouth on described pilot valve body (1) by described pilot valve runner (21d).
3. bidirectional electromagnetic valve as claimed in claim 2, is characterized in that, bidirectional electromagnetic valve has pilot valve chamber (11a), and described piston cavity (4) is communicated with described pilot valve chamber (11a) by described pilot valve runner (21d); When described pilot valve mouth is opened, described first flow (2-1) and described the second runner (2-2) are communicated with described piston cavity (4) by described pilot valve chamber (11a).
4. bidirectional electromagnetic valve as claimed in claim 1, is characterized in that, described first flow (2-1) is for being located at the pipeline of the externally connected pipe (5) on described main valve body (2) outward.
5. bidirectional electromagnetic valve as claimed in claim 4, it is characterized in that, described first interface (2a) is located at the sidewall of described main valve body (2), and described the second interface (2b) is located at one end that valve port is set on described main valve body (2).
6. bidirectional electromagnetic valve as claimed in claim 5, is characterized in that, described pilot valve body (1) is arranged at the sidewall of described main valve body (2), and corresponding to the position of described the second interface (2a).
7. bidirectional electromagnetic valve as claimed in claim 6, is characterized in that, described pilot valve runner (21d) is along longitudinal setting of described main valve body (2).
8. bidirectional electromagnetic valve as claimed in claim 1, is characterized in that, bidirectional electromagnetic valve has a described pilot valve mouth; And in described first flow (2-1) and described the second runner (2-2), be equipped with one-way valve, with extremely extremely described the second interface (2b) of described first interface (2a), described pilot valve mouth of pilot valve mouth described in difference conducting.
9. the bidirectional electromagnetic valve as described in claim 1-8 any one, is characterized in that, the moving iron core arranging in described pilot valve body (1) is described pilot valve head (11).
10. the bidirectional electromagnetic valve as described in claim 1-8 any one, is characterized in that, described main valve body (2) comprises the valve seat (21) that tubular arranges and is positioned at the valve gap (22) of described valve seat (21) one end.
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| CN201310106642.5A CN104074995B (en) | 2013-03-28 | 2013-03-28 | Bidirectional electromagnetic valve |
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| CN201310106642.5A CN104074995B (en) | 2013-03-28 | 2013-03-28 | Bidirectional electromagnetic valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107289174A (en) * | 2016-04-01 | 2017-10-24 | 浙江盾安机械有限公司 | Magnetic valve |
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| CN101761651A (en) * | 2008-12-22 | 2010-06-30 | 印科瓦技术股份有限公司 | Poppet valve operated by an electrohydraulic poppet pilot valve |
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Effective date of registration: 20170120 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Applicant after: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Applicant before: ZHEJIANG SANHUA Co.,Ltd. |
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Effective date of registration: 20220816 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: Xia Li Quan, Chengguan Town, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |