CN104075008A - Linear bidirectional electromagnetic valve - Google Patents
Linear bidirectional electromagnetic valve Download PDFInfo
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- CN104075008A CN104075008A CN201310106726.9A CN201310106726A CN104075008A CN 104075008 A CN104075008 A CN 104075008A CN 201310106726 A CN201310106726 A CN 201310106726A CN 104075008 A CN104075008 A CN 104075008A
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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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- 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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- Engineering & Computer Science (AREA)
- 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 linear bidirectional electromagnetic valve. A first port and a second port whose connection and disconnection are controlled by a piston are arranged on a main valve body, the linear bidirectional electromagnetic valve is provided with a first runner and a second runner which are communicated with the first port and the second port respectively to enable a refrigerant to flow out of a piston cavity, the first runner and the second runner are arranged on the main valve body internally, a guide valve runner is arranged on the main valve body internally, the piston cavity is communicated with a guide valve port on a guide valve body through the guide valve runner, and a guide valve head of the guide valve body moves to open and close the guide valve port to connect or disconnect the first upper runner and the second upper runner with the piston cavity. The guide valve head and the piston of the electromagnetic valve are separated, so that when the electromagnetic valve has great flow demand, increasing of stroke of a movable iron core is not needed;the guide valve head and the main valve body are less prone to malposition; arranging of guide members which are troublesome is not needed, so that compared with the background technology, structure of the electromagnetic valve is simplified obviously, the electromagnetic valve is low in processing difficulty and assembly process cost, and control accuracy can meet requirements.
Description
Technical field
The present invention relates to valve body technical field, particularly a kind of straight line type 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 straight line type 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.
Straight line type 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 straight line type 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 built on described main valve body;
And on described main valve body, be built-in 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.
First flow, second runner of the same first interface of piston cavity, the second interface will in the time that opening, solenoid valve be communicated with, be built 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 this solenoid valve has following beneficial effect:
The first, in the time that solenoid valve has larger traffic demand, valve port increases, the stroke of piston increases, but the stroke of pilot valve head, 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.
And, 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, 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, described main valve body comprises upper valve body and lower valve body; Described first flow comprises and being interconnected, and is built in the first upper runner of described upper valve body and is built in the first lower flow channel of described lower valve body; Described the second runner comprises and being interconnected, and is built in the second upper runner of described upper valve body and is built in the second lower flow channel of described lower valve body; Described pilot valve runner is built in described upper valve body.
Main valve body is set to upper valve body and the lower valve body of split, is convenient to assemble the parts such as the spring in piston, piston cavity; And split-type design is convenient to process required first flow, the second runner therein.
Preferably, described first interface is located at described lower body wall, and described the second interface is located at the end of described lower valve body; Described the first lower flow channel longitudinally arranges; Described the second lower flow channel comprises the longitudinal lower flow channel longitudinally arranging, and is communicated with the transition lower flow channel of described longitudinal lower flow channel and described the second interface.
First interface and the second interface so design, and are convenient to piston control break-make.Now, first flow longitudinally arranges, and refrigerant is the shortest along the stroke of first flow, can improve speed of response, and also directly punching press forms, and is convenient to processing.The second runner longitudinally arranges and can reach equally this effect.
Preferably, described first flow and described the second runner are positioned at same axial section.
So design, first flow is located at both sides relative on main valve body with the second runner, makes the structure of main valve body approach symmetry, improves stability.
Preferably, described the first upper runner and described the second upper runner include the transversely runner and the longitudinal upper runner that are connected.
When refrigerant flows into by longitudinal runner, flow resistance perpendicular to the transversely runner that longitudinally runner arranges is relatively large, opening valve moment at pilot valve body, longitudinally runner exit place pressure changes less, open the suffered pressure reduction in pilot valve mouth plugging part two ends, valve front and back less, unlatching resistance is little, thereby is conducive to the valve of opening of pilot valve body.
Preferably, the transversely runner of described the first upper runner and described the second upper runner is in same cross section.
So, the processing of the transversely runner of two upper runners is more convenient, and the distribution of runner on upper valve body is comparatively symmetrical, contributes to improve the stability of upper valve body.
Preferably, described the first upper runner and described the second upper runner have same longitudinal upper runner.
Adopt same longitudinal upper runner to be convenient to processing, be also convenient to the break-make control of two runners and same pilot valve mouth, and this structure is easier to processing.
Preferably, the runner that enters that supplies refrigerant to flow into described piston cavity is arranged on described piston.
Enter runner design in the time of piston, make refrigerant can flow to rapidly piston cavity, improve the speed of response that solenoid valve opens and closes.
What preferably, be communicated with described first interface enters on the sidewall that runner is arranged at described piston; The end that enters runner and be arranged at described piston being communicated with described the second interface, and this enters the import one-way valve that is provided with the second interface and described piston cavity described in one-way conduction in runner.
When first interface, the second interface are arranged at respectively the sidewall of valve body and end, so design enters runner, corresponding with the position of two interfaces, is easy to realize refrigerant and flows into piston cavity.
Preferably, described upper valve body is provided with downward step surface, has with described lower valve body the upwards step surface coordinating with it; And described upper valve body and described lower valve body are equipped with bolt hole, and the two is fixed by the bolt that inserts described bolt hole.
Step surface coordinates and makes upper valve body and lower valve body in conjunction with more tight, then is equipped with bolt and makes the assembling of the two comparatively reliable.
Preferably, described lower valve body is tubular, and described upper valve body is end cap shape, to block the end that is placed on described upper valve body.
The upper valve body of end cap shape takies less volume, only need possess the volume of built-in two upper runners, 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.
Preferably, straight line type 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 can be communicated with described piston cavity by described pilot valve chamber.
Arrange behind pilot valve chamber, the annexation of pilot valve runner, first flow, the second runner and pilot valve mouth is easier to realize, and is convenient to actual processing.
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 pilot valve runner longitudinally arranges.
So arrange, pilot valve runner 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.
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 provides straight line type bidirectional electromagnetic valve the first embodiment's axial sectional view for invention;
Fig. 4 is the local enlarged diagram at C position in Fig. 3;
Fig. 5 is that the A-A of Fig. 3 is to sectional view;
Fig. 6 is the structural representation of upper valve body in Fig. 3;
Fig. 7 is the structural representation of upper valve body in Fig. 5;
Fig. 8 is the three-dimensional structure diagram of upper valve body in Fig. 3;
Fig. 9 is straight line type bidirectional electromagnetic valve the second embodiment's provided by the present invention axial sectional view;
Figure 10 is that the B-B of Fig. 9 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. 3-9: 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, 2a first interface, 2b the second interface, 21 upper valve bodies, 2-1 first flow, 2-2 the second runner, the longitudinal upper runner of 21a, transversely runner of 21c first, transversely runner of 21b second, 21d pilot valve runner, 211 first seal rings, 212 second seal rings, 213 the 3rd seal rings, 214 bolts, 216 first one-way valves, 215 second one-way valves, 217 grooves, 22 times valve bodies, 22c the first lower flow channel, the longitudinal lower flow channel of 22a, 22b transition lower flow channel, 22d the second lower flow channel, 3 pistons, 3a import equalizing orifice, 3b import one-way valve, 4 piston cavity
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. 3-8, Fig. 3 provides straight line type bidirectional electromagnetic valve the first embodiment's axial sectional view for invention; Fig. 4 is the local enlarged diagram at C position in Fig. 3; Fig. 5 is that the A-A of Fig. 3 is to sectional view; Fig. 6 is the structural representation of upper valve body in Fig. 3; Fig. 7 is the structural representation of upper valve body in Fig. 5; Fig. 8 is the three-dimensional structure diagram of upper valve body in Fig. 3.
This straight line type 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 moving on piston 3, first interface 2a and the second directly conducting of interface 2b.Taking Fig. 3 as visual angle, piston cavity 4 is the cavity of piston 3 upsides 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 and the second runner 2-2 that flow out piston cavity 4 for refrigerant, can understand with reference to figure 4, and two runners in Fig. 3 are shown as black part by Fig. 4, is convenient to check.In addition, in this embodiment, the total part in the upper end of first flow 2-1 and the second runner 2-2 will describe in detail in subsequent content.
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, 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 built in main valve body 2 for first flow 2-1 and the second runner 2-2 of refrigerant outflow piston cavity 4, be arranged at the entity inside 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 Fig. 3, main valve body 2 is equivalent to electromagnetism valve housing, and now, first flow 2-1 and the second runner 2-2 are built in housing.
In addition, on main valve body 2, be built-in with pilot valve runner 21d, piston cavity 4 is communicated with the pilot valve chamber 11a of bidirectional electromagnetic valve by pilot valve runner 21d, and pilot valve chamber 11a and piston cavity 4 keep being communicated with, 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 built 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 built 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 are also fine, and just arrange after the 11a of pilot valve chamber, the annexation of pilot valve runner 21d, 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. 3-5, in this embodiment, first flow 2-1 and the second runner 2-2, one-way conduction pilot valve mouth is to first interface 2a, pilot valve mouth to the second interface 2b respectively.Can find out, between first flow 2-1 and pilot valve mouth, be provided with between the first one-way valve 216, the second runner 2-2 and pilot valve mouth and 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.In addition, the front end of piston 3 can set out step, so that form circular groove between step wall and main valve body 2 inwalls, valve chamber before forming, the setting of front valve chamber is convenient to arrange import equalizing orifice 3a, so that import equalizing orifice 3a is in 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 straight line type 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, and pilot valve chamber 11a and two runners disconnect, and high pressure refrigerant cannot enter the second runner 2-2, i.e. piston cavity 4 and the second interface 2b disconnection.Refrigerant path is now: first interface 2a-import equalizing orifice 3a-piston cavity 4-pilot valve runner 21d-pilot valve chamber 11a.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: first interface 2a-import equalizing orifice 3a-piston cavity 4-pilot valve runner 21d-pilot valve chamber 11a-second runner 2-2-the second interface 2b.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, on piston 3, move, 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 chamber 11a and two runners disconnect, high pressure refrigerant cannot enter first flow 2-1, 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 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 that enters pilot valve chamber 11a 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-first flow 2-1-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, on piston 3, move, solenoid valve valve port 2c 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 built in 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.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.
For above-described embodiment, main valve body 2 specifically can comprise upper valve body 21 and lower valve body 22, as shown in Fig. 3-7.Now, first flow 2-1 can comprise and being interconnected, and is built in the first upper runner of upper valve body 21 and is built in the first lower flow channel 22d of lower valve body 22; The second runner 2-2 comprises and being interconnected, and is built in the second upper runner of upper valve body 21 and is built in the second lower flow channel 22c of lower valve body 22; Pilot valve head 11 is built-in is placed in one end relative with valve port 2c on main valve body 2, and pilot valve runner 21d can be built in upper valve body 21.Main valve body 2 is set to upper valve body 21 and the lower valve body 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 first flow 2-1, the second runner 2-2.Certainly, it is also feasible designing integrated main valve body 2, can connect pilot valve head 11 in its one end, the other end assembling internals, and now the simplification of processing, assembly technology can be inferior to split-type design.
While being designed to split type main valve body 2 and lower valve body 22, the first interface 2a of main valve body 2 can be located at lower valve body 22 sidewalls, and the second interface 2b is located at the end of lower valve body 22, and correspondingly, pilot valve head 11 is connected in the other end.First interface 2a and the second interface 2b so design, and are convenient to piston 3 and control break-make.
Now, the first lower flow channel 22d can longitudinally arrange, and the second lower flow channel 22c can comprise the longitudinal lower flow channel 22a longitudinally arranging, and is communicated with the transition lower flow channel 22b of longitudinal lower flow channel 22a and the second interface 2b, as shown in Figure 3, longitudinally with the direction of main valve body 2 parallel to an axiss.First interface 2a is located at lower valve body 22 sidewalls, and when first flow 2-1 longitudinally arranges, refrigerant is the shortest along the stroke of first flow 2-1, improves speed of response, and also directly punching press forms, and is convenient to processing.The second runner 2-2 comprises that the advantage of longitudinal lower flow channel 22a is identical with first flow 2-1 principle, and because the second interface 2b is positioned at end, longitudinally lower flow channel 22a need be realized and being communicated with by transition lower flow channel 22b and the second interface 2b.
Further, first flow 2-1 and the second runner 2-2 can be positioned at same axial section, as shown in Figure 3.So design, first flow 2-1 is located at both sides relative on main valve body 2 with the second runner 2-2, makes the structure of main valve body 2 approach symmetry, improves stability.
In addition, the first upper runner and the second upper runner can include the transversely runner and the longitudinal upper runner 21a that are connected, the first transversely runner 21b of runner 21c and second transversely as shown in Figure 3, so be easy to processing, and be convenient to realize the break-make of simultaneously being controlled pilot valve chamber 11a and first flow 2-1, the second runner 2-2 by a pilot valve mouth.In addition, when refrigerant flows into by longitudinal runner 21a, flow to the first runner 21c or second transversely when runner 21b transversely, flow resistance perpendicular to the transversely runner that longitudinally runner 21a arranges is relatively large, the opening valve moment of pilot valve body 1, longitudinally runner 21a outlet pressure changes littlely, opens the suffered pressure reduction in steel ball 111 two ends before and after valve less, the unlatching resistance of steel ball 111 is little, thereby is conducive to out valve.Certainly, the first upper runner is obliquely installed also and is fine with relative main valve body 2 axis of the second upper runner.
On this basis, the first upper runner and the second upper runner can have same longitudinal upper runner 21a, as shown in Figure 4, and the first one-way valve 216 and the second one-way valve 215 are located at respectively the first runner 21c and second transversely in runner 21b transversely, so design, is convenient to one-way valve to be fitted in upper valve body 21.Adopt same longitudinal upper runner 21a to be convenient to processing, be also convenient to the break-make control of two runners and same pilot valve mouth.Be appreciated that, pilot valve chamber 11a arranges two pilot valve mouths, two runners are connected with a pilot valve mouth separately, two corresponding steel balls 111 for shutoff two pilot valve mouths or other plugging parts are set on pilot valve head 11, also be fine, now, first flow 2-1 and the second runner 2-2 no longer have total part (longitudinally upper runner 21a).But obviously, the structure of the present embodiment is more simplified, be convenient to processing.
Be appreciated 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, 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, can expect, for reaching this object, it is also feasible two one-way valves being arranged at respectively in two lower flow channel of lower valve body 22.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.
Please continue to refer to Fig. 9-10, Fig. 9 is straight line type bidirectional electromagnetic valve the second embodiment's provided by the present invention axial sectional view; Figure 10 is that the B-B of Fig. 9 is to sectional view.
When the first upper runner and the second upper runner have common longitudinal upper runner 21a, the transversely runner of the two can also be in same cross section, as shown in Figure 9, first transversely runner 21c and second transversely runner 21b in same straight line.Now, the processing of the transversely runner of two upper runners is more convenient, and the distribution of runner on upper valve body 21 is comparatively symmetrical, contributes to improve the stability of main valve body 2.
In addition, as shown in Fig. 3,9, pilot valve runner 21d can also longitudinally arrange, so arrange, pilot valve runner 21d and piston cavity 4 to be connected stroke the shortest, while driving valve, make the high pressure refrigerant that enters piston cavity 4 can enter rapidly pilot valve chamber 11a, the stepping of going forward side by side enters first flow 2-1 or the second runner 2-2, improves solenoid valve speed of response.
Split type main valve body 2 specifically can connect into entirety in the following manner: at upper valve body 21, downward step surface is set, lower valve body 22 has the upwards step surface coordinating with it; And upper valve body 21 and lower valve body 22 are equipped with bolt hole, the two is fixing by the bolt 214 in inserting bolt hole.Step surface coordinates and makes upper valve body 21 and lower valve body 22 in conjunction with more tight, then is equipped with bolt 214 and makes the assembling of the two comparatively reliable.Can also on the surface of contact of the two, seal ring be installed, enhanced leaktightness effect, avoids the leakage of refrigerant, as shown in Fig. 3,5,6, upper valve body 21 and lower valve body 22 coordinate by three grades of step surfaces, and three steps arrange respectively the first seal ring 211, the second seal ring 212, the 3rd seal ring 213.
When main valve body split-type design, can towards the end of pilot valve body 1, groove 217 be set at upper valve body 21, pilot valve mouth is also arranged in groove 217, the pilot valve head 11 of pilot valve body 1 inserts after groove 217, form pilot valve chamber 11a, as shown in Fig. 3,6-7, so, realize easily the design of pilot valve chamber 11a, pilot valve mouth.
Particularly, lower valve body 22 can be tubular, and upper valve body 21 is end cap shape, to block the end that is placed on lower valve body 22.As shown in Fig. 3-6, the upper valve body 21 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 4 by lower valve body 22, be convenient to grasp effective assembling of piston 3.Sealing between piston 3 and valve wall also can be guaranteed.
Above a kind of straight line type 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 (15)
1. a straight line type 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 straight line type bidirectional electromagnetic valve also has first flow (2-1) and the second runner (2-2), 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 built on described main valve body (2);
And on described main valve body (2), be built-in 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. straight line type bidirectional electromagnetic valve as claimed in claim 1, is characterized in that, straight line type 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.
3. straight line type bidirectional electromagnetic valve as claimed in claim 1, is characterized in that, described main valve body (2) comprises upper valve body (21) and lower valve body (22); Described first flow (2-1) comprises and being interconnected, and is built in the first upper runner of described upper valve body (21) and is built in first lower flow channel (22c) of described lower valve body (22); Described the second runner (2-2) comprises and being interconnected, and is built in the second upper runner of described upper valve body (21) and is built in second lower flow channel (22d) of described lower valve body (21); Described pilot valve runner (2d) is built in described upper valve body (21).
4. straight line type bidirectional electromagnetic valve as claimed in claim 3, it is characterized in that, described first interface (2a) is located at described lower valve body (22) sidewall, and described the second interface (2b) is located at the end of described lower valve body (22); Described the first lower flow channel (22c) longitudinally arranges; Described the second lower flow channel (2d) comprises the longitudinal lower flow channel (22a) longitudinally arranging, and is communicated with the transition lower flow channel (22b) of described longitudinal lower flow channel (22a) and described the second interface (2b).
5. straight line type bidirectional electromagnetic valve as claimed in claim 4, is characterized in that, described first flow (2-1) and described the second runner (2-2) are positioned at same axial section.
6. straight line type bidirectional electromagnetic valve as claimed in claim 5, is characterized in that, described the first upper runner and described the second upper runner include the transversely runner and the longitudinal upper runner (21a) that are connected.
7. straight line type bidirectional electromagnetic valve as claimed in claim 6, is characterized in that, the transversely runner of described the first upper runner and described the second upper runner is in same cross section.
8. straight line type bidirectional electromagnetic valve as claimed in claim 6, is characterized in that, described the first upper runner and described the second upper runner have same longitudinal upper runner (21a).
9. straight line type bidirectional electromagnetic valve as claimed in claim 4, is characterized in that, the runner that enters that flows into described piston cavity (4) for refrigerant is arranged on described piston (3).
10. straight line type bidirectional electromagnetic valve as claimed in claim 9, is characterized in that, what be communicated with described first interface (2a) enters on the sidewall that runner is arranged at described piston (3); The end that enters runner and be arranged at described piston (3) being communicated with described the second interface (2b), and this enters the import one-way valve (3b) that is provided with the second interface (2b) and described piston cavity (4) described in one-way conduction in runner.
11. straight line type bidirectional electromagnetic valves as claimed in claim 3, is characterized in that, described upper valve body (21) is provided with downward step surface, have with described lower valve body (22) the upwards step surface coordinating with it; And described upper valve body (21) and described lower valve body (22) are equipped with bolt hole, the two is fixed by the bolt (214) that inserts described bolt hole.
12. straight line type bidirectional electromagnetic valves as claimed in claim 11, is characterized in that, described lower valve body (22) is tubular, and described upper valve body (21) is end cap shape, to block the end that is placed on described upper valve body (21).
13. straight line type bidirectional electromagnetic valves as described in claim 1-12 any one, it is characterized in that, straight line type 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 (2d); When described pilot valve mouth is opened, described first flow (2-1) and described the second runner (2-2) can be communicated with described piston cavity (4) by described pilot valve chamber (11a).
14. straight line type bidirectional electromagnetic valves as described in claim 1-12 any one, is characterized in that, the moving iron core arranging in described pilot valve body (1) is described pilot valve head (11).
15. straight line type bidirectional electromagnetic valves as described in claim 1-12 any one, is characterized in that, described pilot valve runner (2d) longitudinally arranges.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106726.9A CN104075008A (en) | 2013-03-28 | 2013-03-28 | Linear bidirectional electromagnetic valve |
| EP14773584.9A EP2937608B1 (en) | 2013-03-28 | 2014-02-21 | Linear bidirectional electromagnetic valve |
| PCT/CN2014/072351 WO2014154070A1 (en) | 2013-03-28 | 2014-02-21 | Linear bidirectional electromagnetic valve |
| JP2015551979A JP6099226B2 (en) | 2013-03-28 | 2014-02-21 | Two-way solenoid valve |
| KR1020157017509A KR101718437B1 (en) | 2013-03-28 | 2014-02-21 | Linear bidirectional electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106726.9A CN104075008A (en) | 2013-03-28 | 2013-03-28 | Linear bidirectional electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104075008A true CN104075008A (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310106726.9A Pending CN104075008A (en) | 2013-03-28 | 2013-03-28 | Linear bidirectional electromagnetic valve |
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| JP4252395B2 (en) * | 2003-08-01 | 2009-04-08 | 株式会社不二工機 | Electric expansion valve |
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| CN102032382A (en) * | 2009-10-08 | 2011-04-27 | 浙江三花制冷集团有限公司 | Bidirectional solenoid valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US2470470A (en) * | 1945-04-10 | 1949-05-17 | Parker Appliance Co | Valve operating mechanism |
| US5072752A (en) * | 1991-03-14 | 1991-12-17 | Sterling Hydraulics, Inc. | Bidirectional cartridge valve |
| JPH058153U (en) * | 1991-07-11 | 1993-02-05 | 日本ランコ株式会社 | Reversible valve |
| US20040195532A1 (en) * | 2003-04-04 | 2004-10-07 | Barber Dennis R | Hydraulic poppet valve with force feedback |
| JP4252395B2 (en) * | 2003-08-01 | 2009-04-08 | 株式会社不二工機 | Electric expansion 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: Sanhua Refrigeration Group Co., Ltd., Zhejiang Address before: 312500 Xinchang, Zhejiang province Qixing street under the village of Liquan Applicant before: Zhejiang Sanhua Co., Ltd. |
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Application publication date: 20141001 |