CN108463662A - Electromagnetic switching valve - Google Patents
Electromagnetic switching valve Download PDFInfo
- Publication number
- CN108463662A CN108463662A CN201780007002.5A CN201780007002A CN108463662A CN 108463662 A CN108463662 A CN 108463662A CN 201780007002 A CN201780007002 A CN 201780007002A CN 108463662 A CN108463662 A CN 108463662A
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- China
- Prior art keywords
- plunger
- spool
- mentioned
- attractor
- mouthful
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
In electromagnetic switching valve, it is consistent at the time of i.e. kick action start time becomes very big with the mutual attraction for being formed in attractor (24) and plunger (28) at the time of plunger (28) and connecting rod (20) move preset distance in the case where attractor (24) is excited.
Description
Technical field
The present invention relates to electromagnetic switching valves.
Background technology
Solenoid valve is configured to, for example, as shown in patent document 1 to 4, including valve body portion and electromagnetic coil assembly are as master
The element wanted.The cylindrical portion in the valve body portion in this solenoid valve has attractor and plunger unit mechanism in inside
Portion.Plunger unit mechanism part has plunger, is pressed set on the spool of the front end of plunger and along the valve seat towards valve body portion
The helical spring that the direction of spool exerts a force to plunger.Plunger is with spool in a manner of it can mutually move predetermined amount in the axial direction
Connection.
In this motor-driven valve, it is proposed that following scheme：As shown in Fig. 1 in patent document 1, with formed for plunger
Linking part is inserted into and the protrusion of the linking part of the connected part and the plunger being inserted into of the inner peripheral surface of the guide groove of the spool of engaging
Scheduled gap is formed between the peripheral surface in portion.By forming this scheduled gap, it is excited in attractor and plunger is close
In the case of attractor, first, only plunger overcomes the active force of plunger spring and approaches the suction detached with the valve seat in valve body portion
Introduction.As a result, when the attraction being formed between plunger and attractor becomes much larger, the above-mentioned lug boss of the linking part of plunger
Peripheral surface be connected to the part that is connected of inner peripheral surface for the guide groove for forming spool, the movement of adjoint plunger, spool it is needle-shaped
The mouth that portion lifts off a seat so that above-mentioned scheduled gap becomes zero.As disclosed in patent document 1 to 4, generally by this
The linking part of kind of plunger it is mobile and engage with spool so that above-mentioned scheduled gap as after zero, to the needle-like portion for making spool
The a series of actions for the mouth lifted off a seat is known as kick action.For the action of this kick, rushing when plunger engages with spool
It hits power and is used in spool leaving from the mouth of valve seat, in addition, at the time of plunger becomes much larger close to attractor and attraction, valve
The needle-like portion of core is left from the mouth of valve seat, therefore can minimize the solenoid valve including electromagnetic coil.
In addition, for example, as shown in patent document 5, it is proposed that following scheme：In the preliminary work that electromagnetic coil is energized,
In order to improve the thrust for making plunger action, by the front end of the cross sectional shape of the front end of the protruding portion of plunger and the protruding portion of attractor
Cross sectional shape be formed as acute angle, so as to the state very close in plunger and attractor (being known as core in patent document 4)
Under make flux concentrating.
Also, for example, in the slidingtype electromagnetic switching valve (guiding valve) as shown in patent document 6, there is also pass through
The case where above-mentioned kick acts is carried out with the connecting rod and spool of plunger connection.
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2013-137094 bulletins
Patent document 2：Japanese Unexamined Patent Publication 2001-41340 bulletins
Patent document 3：Japanese Unexamined Patent Publication 2003-301962 bulletins
Patent document 4：Japanese Patent Publication 6-16174 bulletins
Patent document 5：No. 5427210 bulletins of Japanese Patent No.
Patent document 6：Japanese Unexamined Patent Publication 2015-110993 bulletins
Invention content
In solenoid valve as described above, need with shape corresponding with the action of desired kick and the lifting capacity of plunger
It is that best mode sets plunger unit mechanism part and electromagnetic coil, but is supplying at the attraction between plunger and attractor
To in the solenoid valve of relatively high pressure, bigger attraction is needed in order to make spool be left from the mouth of valve seat.Generate ratio
The plunger unit mechanism part of larger attraction and electromagnetic coil etc. include solenoid unit since appearance and size becomes larger
Solenoid valve inside integrally becomes enlargement.In addition, it is assumed that being managed not in the size for constituting each component of plunger unit mechanism part
In the case of appropriate, the lifting capacity of plunger generates deviation, when there are becoming great relative to attraction at the time of kick action
Carve the possibility for generating deviation.Therefore, the size management for constituting each component of plunger unit mechanism part requires relatively high precision.
In this case, there is a possibility that manufacturing cost is raised.
Problem more than consideration, the purpose of the present invention is to provide a kind of electromagnetic switching valves, in electromagnetic switching valve, i.e.,
Make in the electromagnetic switching valve for supplying relatively high pressure, the miniaturization of electromagnetic switching valve can be also realized, moreover, not being configured
The precision of the size management of each component of plunger unit mechanism part is driven, corresponding at the time of capable of being acted with kick to attract
Power control is best.
To achieve the goals above, electromagnetic switching valve of the invention is characterized in that having：Spool receiving portion, has
The first being connect with the first access and second mouthful connect with alternate path, the spool receiving portion will have via connecting rod and
It is accommodated with the plunger unit of the plunger of spool connection as that can move, which is connected to first and second mouthful and to second mouthful
Control is opened and closed；And plunger unit driving mechanism, so that plunger unit is carried out the action that control is opened and closed to second mouthful,
In the case where plunger unit driving mechanism does not work, it is formed in the inner peripheral and spool of the spool guide portion of the opening of connecting rod
Peripheral surface between the predetermined gap of the moving direction along plunger be dimensioned to and apart from equal, which is edge below
The corner of the cylindrical portion of the plunger of the moving direction of plunger and constitute plunger unit driving mechanism attractor end with
The mutual distance in the corner that the corner of the cylindrical portion of plunger faces.
In addition, the electromagnetic switching valve of the present invention is characterized in that having：Spool receiving portion has and connects with the first access
First, second mouthful connect with alternate path and the third mouth being connect with third path connect, the spool receiving portion will have
There is the plunger unit of the plunger linked with spool via connecting rod to accommodate can to move, the spool and first, second mouthful
And the connection of third mouth, and either one for making in second mouthful and third mouth is selectively communicated with first；And plunger list
First driving mechanism, the action for making plunger unit be controlled in the following manner：Make times in second mouthful and third mouth
One side selectively communicates with first, in the case where plunger unit driving mechanism does not work, is formed in the opening of connecting rod
The inner peripheral of spool guide portion and the peripheral surface of spool between the size of predetermined gap of the moving direction along the plunger set
It is set to below apart from equal, which is the corner of the cylindrical portion of the plunger of the moving direction along plunger and constitutes plunger list
The corner of the end of the attractor of first driving mechanism faced with the corner of the cylindrical portion of plunger it is mutual at a distance from.
Also, the electromagnetic switching valve of the present invention is characterized in that having：Spool receiving portion has and connects with the first access
It the first that connects, connect with alternate path second mouthful, the third mouth being connect with third path and is connect with fourth passage
4th mouthful, which accommodates the plunger unit with the plunger linked with spool via connecting rod to move
Dynamic, which is connected to first, second mouthful, third mouth and the 4th mouthful, and makes either one in second mouthful and the 4th mouthful
Mouth selectively communicated with first, and make second mouthful third mouth is connected to or made with third mouth and be connected to the 4th mouthful；And
Plunger unit driving mechanism, the action for making plunger unit be controlled in the following manner：Make second mouthful and the 4th mouthful
In the mouth of either one selectively communicated with first, and make second mouthful third mouth and the 4th mouthful are connected to or made with third mouth
Connection, in the case where plunger unit driving mechanism does not work, is formed in the inner peripheral of the spool guide portion of the opening of connecting rod
The predetermined gap of the moving direction along plunger between the peripheral surface of spool be dimensioned to below apart from equal, should be away from
The corner of cylindrical portion from the plunger for being moving direction along plunger and constitute plunger unit driving mechanism attractor end
The corner faced with the corner of the cylindrical portion of plunger in portion it is mutual at a distance from.
In addition, attractor can also have shaded-pole coil in the end of the cylindrical portion in face of plunger.
Electromagnetic switching valve according to the present invention is formed in connecting rod in the case where plunger unit driving mechanism does not work
Opening the inner peripheral of spool guide portion and the peripheral surface of spool between the moving direction along plunger predetermined gap ruler
It is very little to be set as, the attraction with the corner and composition plunger unit driving mechanism of the cylindrical portion of the plunger of the moving direction along plunger
The mutual spacing in the corner in the corner of the cylindrical portion in face of plunger of the end of son is from equal, as a result, in composition plunger unit
When the attractor work of driving mechanism, driven along the corner of the cylindrical portion of the plunger of the moving direction of plunger with plunger unit is constituted
The corner in the corner of the cylindrical portion in face of plunger of the end of the attractor of motivation structure is closest and in common plane,
Therefore being formed in attractor and the mutual attraction of plunger becomes very big, therefore, attracts force efficiency to act on well prominent
Bounce is made, as a result, even if can realize the small-sized of electromagnetic switching valve if in the electromagnetic switching valve for supplying relatively high pressure
Change, and the precision for not being configured the size management of each component of plunger unit mechanism part is driven, and can will be acted with kick
At the time of the control of corresponding attraction be best.
Description of the drawings
Fig. 1 is the broken section of the major part of the first embodiment for the electromagnetic switching valve that partial enlargement indicates the present invention
Figure.
Fig. 2 is the sectional view of the structure for the first embodiment that outlined the electromagnetic switching valve of the present invention.
Fig. 3 A are the partial sectional views for the action specification in first embodiment shown in Fig. 2.
Fig. 3 B are the partial sectional views for the action specification in first embodiment shown in Fig. 2.
Fig. 4 be in the example shown in Fig. 2 attractor and plunger be excited in the state of illustrate kick act
Partial sectional view.
Fig. 5 be in the example shown in Fig. 2 attractor and plunger be excited in the state of illustrate kick act
Partial sectional view.
Fig. 6 is the characteristic line for the characteristic for illustrating that attraction corresponding with the cone angle of the end of plunger and attractor
Performance plot.
Fig. 7 A are the partial sectional views of the plunger and attractor that indicate comparative example 1.
Fig. 7 B are the partial sectional views of the plunger and attractor that indicate comparative example 2.
Fig. 8 is the performance plot of the characteristic line of the characteristic for the attraction for illustrating that plunger and attractor shown in Fig. 2.
Fig. 9 is another partial sectional view for indicating plunger and attractor.
Figure 10 is indicate attractor and plunger used in the first embodiment of the electromagnetic switching valve of the present invention another
The partial sectional view of example.
Figure 11 is the characteristic line for the characteristic for illustrating that attraction corresponding with the cone angle of the end of plunger and attractor
Performance plot.
Figure 12 A are indicate attractor and plunger used in the first embodiment of the electromagnetic switching valve of the present invention another
The partial sectional view of example.
Figure 12 B are indicate attractor and plunger used in the first embodiment of the electromagnetic switching valve of the present invention another
The partial sectional view of example.
Figure 13 A are the variation i.e. AC system electromagnetic switching valve institutes for the first embodiment for indicating the electromagnetic switching valve of the present invention
The partial sectional view of an example of the attractor and plunger that use.
Figure 13 B are the variation i.e. AC system electromagnetic switching valve institutes for the first embodiment for indicating the electromagnetic switching valve of the present invention
The partial sectional view of an example of the attractor and plunger that use.
Figure 13 C are the variation i.e. AC system electromagnetic switching valve institutes for the first embodiment for indicating the electromagnetic switching valve of the present invention
The partial sectional view of an example of the attractor and plunger that use.
Figure 14 is the sectional view of the structure for the second embodiment that outlined the electromagnetic switching valve of the present invention.
Figure 15 is the sectional view of the structure for the 3rd embodiment that outlined the electromagnetic switching valve of the present invention.
Figure 16 is the sectional view of the structure for the fourth embodiment that outlined the electromagnetic switching valve of the present invention.
Specific implementation mode
Fig. 2 outlined the structure of the first embodiment of the electromagnetic switching valve of the present invention together with effective pipe.
In fig. 2, electromagnetic switching valve is, for example, four-way electromagnetic switching valve (guiding valve), and the refrigerant being configured in air conditioner returns
In the piping on road.Electromagnetic switching valve includes that following portion is constituted as main inscape, that is, has connecting rod 20 and energy
Enough plungers 28 being movably configured in plunger tube 26；With scheduled movable fit in the cunning in the opening portion 20a of connecting rod 20
The spool 22 of dynamic formula；The valve body portion 10 combined with one end of plunger tube 26；Close the attractor 24 of one end of plunger tube 26；With
And it is configured at the peripheral part of plunger tube 26 and selectively carries out the solenoid unit of excitation to plunger 28 and attractor 24.
Solenoid unit is constituted with following each portion for main element, that is, is configured at the peripheral part of plunger tube 26
Coil part 15；And the shell 16 that the magnetic substance of coil part 15 is constituted is accommodated by covering coil part 15 and in inside.
Coil part 15 is electrically connected via lead LW with the drive control part that the illustration is omitted.Screw 18 is via shell 16
Mounting hole and screw in the internal thread hole of attractor 24, thus solenoid unit is fixed on attractor 24.
In the case where attractor 24 is by 15 excitation of coil part, aftermentioned plunger 28 is pulled because of magnetic force to attractor
24.As shown in amplification in Fig. 3 A, in attractor 24 in face of the end of plunger 28, the cross section with general cylindrical shape is formed
Recess portion 24R.
In the open end of the recess portion 24R of attractor 24, it is formed with and forms orthogonal cricoid of the inner peripheral surface of recess portion 24R
Flat surface 24fe.Therefore, in the part that the inner peripheral surface of flat surface 24fe and recess portion 24R intersects, cricoid intersection 24Cd is formed.
As shown in Fig. 2, the end of attractor 24 of the plunger 28 in plunger tube 26 and the valve in aftermentioned valve body portion 10
It can be movably arranged between the plunger tube support portion 10E of core receiving portion 10A with attractor 24 in the heart.Plunger 28 is by being inserted into
Small diameter portion in the recess portion 24R of above-mentioned attractor 24 and the large-diameter portion that can be slidably guided in plunger tube 26 are constituted.
Plunger 28 has access 28b and 28a along center axis in the inside of small diameter portion and large-diameter portion.Access
The internal diameter of 28b is set as bigger than the internal diameter of access 28a.As shown in amplification in Fig. 3 A, plunger 28 large-diameter portion in face of upper
The end for the attractor 24 stated is formed with cylindrical portion 28te.In the end face of cylindrical portion 28te, opening has access 28b's
One end.
Stage portion between the access 28b and access 28a in face of the end of attractor 24, accepts and accommodates spiral shell
Revolve one end of spring 30.The other end of helical spring 30 is abutted with the inner peripheral surface of the bottom of the formation recess portion 24R of attractor 24.By
This, helical spring 30 towards the direction detached relative to attractor 24, i.e. valve body portion 10 plunger tube support portion 10E to plunger
28 forces.It is connected in the other end of access 28a and the recess portion 28c of the lower end of plunger 28.It is configured in recess portion 28c and plunger
The connecting rod 20 of the plate of 28 connections and one end of leaf spring 34.
One end of metal leaf spring 34 is linked using connecting piece 20K with one end of connecting rod 20.In addition, connecting rod 20
And one end of leaf spring 34 is combined by riveting with plunger 28 using the lower end periphery of recess portion 28c.Leaf spring 34 is by following
Portion is formed, that is, utilizes the fixed fixed parts of connecting piece 20K；With the protrusion abutted with the peripheral surface of aftermentioned spool 22
Abutting part；And the bullet for linking fixed part and abutting part and being exerted a force towards the peripheral surface of spool 22 to abutting part with scheduled pressure
Property displacement portion.Elastic displacement portion becomes scheduled angle of inclination relative to fixed part and abutting part.
In the opening portion 20a of connecting rod 20, it can relatively movably be fitted into the spool 22 for having resin.Such as office in Fig. 1
Shown in amplifying to portion, the moving direction along plunger 28 of the periphery of opening portion 20a is dimensioned to than corresponding spool 22
Size is slightly larger.As a result, in the case where coil part 15 is not excited, and company is connected in a square end face of the peripheral surface of spool 22
In the state of the periphery for tying the opening portion 20a of bar 20, in the periphery and the peripheral surface of spool 22 of the opening portion 20a of connecting rod 20
Scheduled clearance delta ED is formed between another party end face.Clearance delta ED is corresponding with the idling stopping distance of plunger 28 and connecting rod 20.
Spool 22 has slot 22G in a square end portion of the sliding contact surface 32a in face of valve seat 32.Slot 22G makes aftermentioned valve
Adjacent two mouths connection of seat 32.In Fig. 1, indicate that slot 22G makes the third mouth 32P2 of valve seat 32 be connected to the 4th mouthful of 32P3
State.
In addition, in the case where coil part 15 is not excited, as shown in Figure 3A, cylindrical portion 28te and the attraction of plunger 28
The recess portion 24R separation of son 24.At this point, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned attractor 24
The mutual distance, delta D of the moving direction along plunger 28 of intersection 24Cd is set as and above-mentioned predetermined gap Δ ED (referring to Fig.1)
It is roughly the same.
On the other hand, in the case where attractor 24 is excited, as shown in Figure 3B, cylindrical portion 28te is inserted into attractor
In 24 recess portion 24R, until forming the inner surface of the bottom surface sections of recess portion 24R.
As a result, in the case where attractor 24 is excited, as shown in figure 5, being moved in plunger 28 and connecting rod 20 pre-
At the time of set a distance Δ ED, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd such as Fig. 4 institutes
Show like that closest to and on the common plane PL, therefore the small diameter portion that is formed in attractor 24 and plunger 28 is mutual
Attraction becomes very big.Therefore, at the time of plunger 28 moves preset distance Δ ED, so-called kick action start time with formed
It is consistent at the time of the mutual attraction of the small diameter portion of attractor 24 and plunger 28 becomes very big.
Valve body portion 10 is made by metal material, such as brass, stainless steel, aluminium alloy, has in inside and accommodates plunger
28 connecting rod 20, the spool receiving portion 10A of spool 22 and valve seat 32.As shown in Fig. 2, in spool receiving portion 10A, and with
One end connection with effective pipe 12 for being provided as the first access is formed on the substantially orthogonal axis of the central axis of plunger 28
First (not shown).
In addition, as shown in Figure 1, in the valve seat 32 being configured in spool receiving portion 10A, and in the central axis with plunger 28
It is formed with second mouthful of 32P1 of one end connection with effective pipe 14 for being provided as alternate path on substantially orthogonal axis, is provided as
The third mouth 32P2 of one end connection with effective pipe 16 of third path, the one end with effective pipe 18 for being provided as fourth passage connect
The 4th mouthful of 32P3 connect.
In the sliding contact surface 32a for the valve seat 32 that above-mentioned spool 22 is slided along the moving direction of plunger 28, with scheduled pressure
Power abuts the sealing surface 22TS for having spool 22.Pass through the slot of the spool 22 in the sliding contact surface 32a according to valve seat 32 as a result,
The position of 22G makes two mouths in three adjacent mouths of valve seat 32 selectively communicate with, to switch the flowing side of fluid
To.For example, in the case where coil part 15 is not excited, as shown in Figure 1, third mouth 32P2 and the 4th mouthful of 32P3 is via spool 22
Slot 22G and be connected to, to fluid from effective pipe 18 flow direction match effective pipe 16, and from effective pipe 12 flow direction match effective pipe
14.On the other hand, in the case where coil part 15 is excited, second mouthful of 32P1 and third mouth 32P2 via spool 22 slot 22G
And be connected to, to which fluid matches effective pipe 18 from the flow direction of effective pipe 14 with effective pipe 16, and from the flow direction of effective pipe 12.
Driving mechanism including plunger unit made of plunger 28, connecting rod 20 and spool 22 is configured to include electromagnetic wire
Coil unit, attractor 24 and helical spring 30.
In this configuration, in the case where attractor 24, plunger 28 be not by 15 excitation of coil part, as shown in Figure 1, spool 22
Slot 22G position (initial position) across third mouth 32P2 and the 4th mouthful of 32P3 of valve seat 32.Fluid is from effective pipe as a result,
18 flow directions match effective pipe 16, and match effective pipe 14 from the flow direction of effective pipe 12.
On the other hand, in the case where attractor 24, plunger 28 are by 15 excitation of coil part, first, the connecting rod of plunger 28
20 are pulled up, as shown in figure 5, the periphery of the opening portion 20a of connecting rod 20 from another party end face in the peripheral surface of spool 22 from
It opens, and mobile preset distance Δ ED, until the periphery of opening portion 20a of connecting rod 20 and the side in the peripheral surface of spool 22
End face abuts.Then, when plunger 28 is further up with spool 22, the slot 22G of spool 22 in valve seat 32 second
Mouthful 32P1 and third mouth 32P2 and position.Therefore, fluid matches effective pipe 16 from the flow direction of effective pipe 14, and from effective pipe 12
Flow direction matches effective pipe 18.Then, in the case where attractor 24, plunger 28 are not excited, due to the active force of helical spring 30,
Plunger 28 and connecting rod 20 leave attractor 24, spool 22 by the periphery of the opening portion 20a of connecting rod 20 downward by
Pressing, the slot 22G of spool 22 return to above-mentioned initial position.In addition, as described above, according to the active force of helical spring 30, column
When plug 28 and connecting rod 20 leave attractor 24, kick action is also carried out.
Referring to comparative example 1 shown in above-mentioned 24 variform Fig. 7 A and 7B of plunger 28 and attractor and
Comparative example 2 illustrates the cross sectional shape of the end of attractor and plunger, mutual spacing to mutual in attractor and plunger
Influence caused by the attraction of generation.
In Fig. 6, if the longitudinal axis is to be formed in attractor and the mutual attraction F (N) of plunger, if horizontal axis is carrying for plunger
L (mm) is set in raise-position, illustrate that the variation of the attraction corresponding with the raised position of plunger of scheduled cone angle characteristic line Qs,
Qt and characteristic line Qf.Characteristic line Qf shows what such, attractor 4 as comparative example 1 and plunger 8 shown in Fig. 7 A combined
In the case of attraction F corresponding with raised position variation, such, conduct is shown respectively shown in Fig. 7 B in characteristic line Qs, Qt
The variation of attraction F corresponding with raised position in the case of attractor 2 and plunger 6 combination of comparative example 2.In addition, with
The raised position for plunger is left from origin O and is become larger, and the mutual spacing of attractor and plunger is from also becoming larger.I.e., the area of A is promoted
The mutual spacing of attractor and plunger in domain is smaller from compared with the region for promoting B and promotion C.
The opposed facing end face 4a and 8a of attractor 4 and plunger 8 in comparative example 1 is formed as flat surface.
The end face portion 6a in face of attractor 2 of plunger 6 in comparative example 2 has the circular cone shape with scheduled cone angle beta
Section be formed with for the shallower recess portion 2R of the chimeric ratios of the end face portion 6a of plunger 6 in the square end face of attractor 2.Recessed
The inner peripheral surface of portion 2R is formed with the conical surface 2a of the end face abutting for the circular cone shape of plunger 6.In addition, characteristic line Qs in Fig. 6
(cone angle b) is set as cone angle beta (the cone angle a) of the end face portion 6a of the plunger 6 of ratio characteristic line Qt to the cone angle beta of the end face portion 6a of plunger 6
It is small.
In comparative example 2, from characteristic line Qs, Qt in Fig. 6 it is found that as the cone angle beta of the end face portion 6a of plunger 6 becomes smaller,
The gradient of characteristic line Qs becomes smaller relative to the gradient of characteristic line Qt, and characteristic line Qs becomes gentle curve.
In addition, in the case of the promotion regions C of scheduled raised position Lb or more, the value of attraction F is in characteristic line Qs
In the case of become maximum.I.e., in the case where promoting the regions C, the value of attraction F is in the suction that characteristic line Qs, Qt, Qf can be obtained
In the combination of introduction 4 and plunger 8, attractor 2 and plunger 6, the form of cone angle beta minimum becomes maximum.
Also, below raised position Lb and in the case of the promotion B area of raised position La or more, the value of attraction F
Become maximum in the case of characteristic line Qt.I.e., B area is being promoted, the value of attraction F is in the suction that characteristic line Qs, Qt can be obtained
In the combination of introduction 2 and plunger 6, the form that the cone angle beta of the end face portion 6a of plunger 6 is larger becomes larger.
Also, in the case of the promotion a-quadrant less than raised position La, the value of attraction F is the characteristic line Qf the case where
Under become maximum.I.e., in the case where promoting a-quadrant, attraction F is in attractor 4 and the opposed facing end face 4a of plunger 8
And 8a becomes maximum when being flat surface.
In this way, promoted a-quadrant, promoted B area, promoted C regions it is each in, the cone angle beta of greatest attraction forces can be obtained
It changes.Cone angle beta is set based on this reason, to obtain greatest attraction forces in desired raised position.
I.e., for example when plunger is larger at a distance from attractor, in the case where needing larger attraction, selection has
The plunger of end face portion with minimum cone angle (with reference to comparative example 2).On the other hand, smaller at a distance from attractor in plunger
When, in the case where needing larger attraction, selection has the plunger of the end face portion with 180 ° of cone angle (with reference to comparative example
1)。
In Fig. 8, if the longitudinal axis is to be formed in attractor and the mutual attraction F (N) of plunger, if horizontal axis is carrying for plunger
L (mm) is set in raise-position, illustrates that the characteristic line Qd and characteristic line Qe of the variation of attraction corresponding with the raised position of plunger.
In addition, as the raised position of plunger is left from origin O and becomes larger, the mutual spacing of attractor and plunger is from also becoming larger.
Characteristic line Qe show the attractor 4 for being applicable to the first embodiment of the switching valve of the present invention shown in Fig. 9 and
The variation of attraction corresponding with raised position in the case of the combination of plunger 8 '.In fig.9, attractor 4 and plunger 8 '
Opposed facing end face 4a and 8 ' a are formed as flat surface.In addition, having with scheduled depth in 8 ' a of the end face of plunger 8 ' openings
8 ' the H of recess portion of degree.
Characteristic line Qd show as shown in Figure 2, attractor 24 in the first embodiment of switching valve of the invention and
The variation of attraction corresponding with raised position in the case of the combination of plunger 28.
In a series of kicks action in the case where attractor 24, plunger 28 are by 15 excitation of coil part, in plunger 28
In the case that the periphery of the opening portion 20a of connecting rod 20 moves preset distance Δ ED relative to spool 22 as shown in Figure 5,
In fig. 8, plunger 28 is moved to the raised position that the opening portion 20a peripheries of connecting rod 22 are abutted from the square end face with spool 22
L3 has left the raised position Lo of preset distance Δ ED.In raised position Lo (hereinafter also referred to kick position), such as Fig. 5 institutes
Show, the periphery of above-mentioned opening portion 20a is abutted with facing another party end face of spool 22.
As described above, for attraction F corresponding with kick position Lo in characteristic line Qd, due to the major diameter of plunger 28
The intersection 24Cd of the corner 28Cd of the cylindrical portion 28te in portion and above-mentioned attractor 24 is closest and is in common plane PL
On, therefore attractor 24 and the mutual attraction F of plunger 28 reach scheduled maximum F1.Therefore, reach in attraction F
When scheduled maximum F1, kick action can be carried out, thus attractor 24 and plunger 28 it is mutual attraction F efficiency it is good
Kick action is acted on well, as a result, the miniaturization of electromagnetic switching valve can be achieved.
In addition, kick position Lo for example under raised position L2 unanimous circumstances, along the moving direction of above-mentioned plunger 28
Plunger 28 large-diameter portion cylindrical portion 28te corner 28Cd and above-mentioned attractor 24 intersection 24Cd mutual spacing from
Δ D is set as identical as above-mentioned clearance delta ED.Raised position L2 becomes for example along the big of the plunger 28 of the moving direction of plunger 28
The corner 28Cd of the cylindrical portion 28te in diameter portion and the immediate positions intersection 24Cd of above-mentioned attractor 24.
In addition, even if in kick position Lo from raised position L1 to raised position L2's due tos foozle of component etc.
In the case that deviation occurs in range, according to from raised position L1 to the gentle curve of the range of raised position L2 i.e. spy
Line Qd is it is found that attraction F is being also maintained near maximum F1 property from raised position L1 to the range of raised position L2, therefore is carried
The deviation for supplying the attraction of kick position is less.
Also, as shown in Figure 10, attractor 3 used in the first embodiment of electromagnetic switching valve of the invention with
And in the combination of plunger 5, in the case where the cone angle of the conical surface of the end 5TE of plunger 5 is less than 180 °, as shown in figure 11, attract
The characteristic of power F has the tendency as gentle curve, that is, characteristic line Qb, the Qc of ratio characteristic line Qa.
In Fig. 10, in the open end of the recess portion 3R of attractor 3, it is connected with the coniform section with conical surface 3be
End 3BE.Form the cricoid intersection 3Cd that the open end of conical surface 3be and recess portion 3R intersects.Conical surface 3be be set as with it is aftermentioned
The identical scheduled cone angle of cone angle of the conical surface of the end 5TE of plunger 5.Plunger 5 small diameter portion face above-mentioned attractor 3
End, be formed with end have corner 5Cd cylindrical portion 5te.In the end face of cylindrical portion 5te, opening has recess portion 5b
One end.In the case where attractor 3 is excited, cylindrical portion 5te and corner 5Cd are inserted into recess portion 3R, until and shape
It is abutted at the inner surface of the bottom of recess portion 3R.The lower end of cylindrical portion 5te is connected with the end in the coniform section with the conical surface
Portion 5TE.Conical surface 3bes of the end 5TE in face of the end 3BE of attractor 3.The conical surface of end 5TE is set as scheduled cone angle, example
Such as 45 ° or more and 180 ° of angles below.
In Figure 11, if the longitudinal axis is to be formed in attractor and the mutual attraction F (N) of plunger, if horizontal axis is plunger
Raised position L (mm) illustrates that characteristic line Qa, Qb, Yi Jite of the variation of attraction corresponding with the raised position of plunger
Property line Qc.In addition, as the raised position of plunger is left from origin O and becomes larger, the mutual spacing of attractor and plunger is from also becoming
Greatly.Characteristic line Qa show as shown in Figure 2, it is corresponding to raised position in the case where attractor 24 and plunger 28 combine
Attraction F variation.I.e., the facing end face of attractor 24 and plunger 28 becomes the shape for not forming any conical surface.
Characteristic line Qb, Qc be shown respectively as shown in Figure 10, in the case that above-mentioned attractor 3 and plunger 5 combine
The variation of attraction corresponding with raised position.At this point, (cone angle a) is set as the cone angle of the end of plunger 5 in characteristic line Qb
(cone angle b) is big for the cone angle of the end of plunger 5 in ratio characteristic line Qc.From characteristic line Qb, Qc it is found that with plunger 5 end
Cone angle becomes smaller, near the raised position Lk as scheduled kick position by characteristic line become flat.
Therefore, in the first embodiment of the electromagnetic switching valve of the present invention, by attract force characteristic close to flat position
It sets and carries out valve opening action, the deviation of attraction caused by the deviation to lifting capacity becomes smaller, and operability is stablized, therefore can compare
The dimensional tolerance of the earth set parts.
In addition, the present invention electromagnetic switching valve first embodiment used in supply voltage direct current attractor and
Plunger is not limited to the above example, such as can also be such attractor and plunger shown in Figure 12 A and Figure 12 B.
In Figure 12 A and Figure 12 B, same symbol is marked for inscape identical with the inscape in example shown in Fig. 2, and
Omit its repeated explanation.
In fig. 12, in the end face of attractor 44, the recess portion 48b of columned protrusion 44P towards plunger 48 is protruded in advance
Fixed length.The diameter of protrusion 44P is set as more slightly smaller than the internal diameter of recess portion 48b.The front end face of protrusion 44P is formed as flat
It is smooth.Cricoid flat surface is formed with around protrusion 44P.In plunger 48 in face of the end of above-mentioned attractor 44, opening
There is one end of the recess portion 48b with circular cross-section.It is formed with flat surface around the open end of recess portion 48b.In attractor 44
In the case of being excited, protrusion 44P is inserted into recess portion 48b, until the periphery of the open end of the recess portion 48b of plunger 48 and suction
The cricoid flat surface of introduction 44 abuts.
In this configuration, it is set as, in the case where attractor 44 is excited, is moved in plunger 48 and connecting rod pre-
At the time of set a distance Δ ED, the front end face of flat surface and protrusion 44P around the open end of the recess portion 48b of plunger 48 most connects
Closely and on common plane PL.Being formed in attractor 44 and the mutual attraction of plunger 48 as a result, becomes very big.Cause
This, at the time of plunger 48 moves preset distance Δ ED, the action of so-called kick start time and be formed in attractor 44 and column
It is consistent at the time of becoming very big to fill in 48 mutual attractions.
In Figure 12 B, in the open end of the recess portion 42R of attractor 42, it is connected with coniform section with conical surface 42be
The end 42BE in face.It is formed with the cricoid intersection 42Cd that the open end of conical surface 42be and recess portion 42R intersects.Conical surface 42be settings
For scheduled cone angle identical with the cone angle of the conical surface of end 46TE of aftermentioned plunger 46.In the face of the small diameter portion of plunger 46
To the end of above-mentioned attractor 42, it is formed with cylindrical portion 46te.In the end face of cylindrical portion 46te, opening has the one of recess portion 46b
End.In the case where attractor 42 is excited, cylindrical portion 46te is inserted into recess portion 42R, until the bottom with formation recess portion 42R
The inner surface in portion abuts.The lower end of cylindrical portion 46te is connected with the end 46TE in the coniform section with the conical surface.End
Conical surface 42bes of the 46TE in face of the end 42BE of attractor 42.The conical surface of end 46TE is set as scheduled cone angle, such as 45 °
Above and 180 ° of angles below.
In this configuration, it is set as, in the case where attractor 42 is excited, is moved in plunger 46 and connecting rod pre-
At the time of set a distance Δ ED, the corner 46Cd of the cylindrical portion 46te of the small diameter portion of plunger 46 and above-mentioned intersection 42Cd it is closest and
On common plane PL.Being formed in the mutual attraction of small diameter portion of attractor 42 and plunger 46 as a result, becomes pole
Greatly.Therefore, at the time of plunger 46 moves preset distance Δ ED, so-called kick action start time and be formed in attractor 42 with
And the mutual attraction of plunger 46 is consistent at the time of become very big.
Also, Figure 13 A to Figure 13 C outlined the change of the first embodiment of the electromagnetic switching valve as the present invention respectively
The major part of attractor and plunger used in the four-way electromagnetic switching valve (guiding valve) of shape example.In addition, in Figure 13 A, Figure 13 B
It is pair identical with example shown in Fig. 2, Figure 12 A and Figure 12 B inscapes in the illustrated example respectively and in Figure 13 C
Inscape marks same symbol, and omits its repeated explanation.
In figure 13a, in the open end of 24 ' R of the recess portion of attractor 24 ', it is formed with the inner circumferential with 24 ' R of formation recess portion
Orthogonal 24 ' the fe of cricoid flat surface in face.Therefore, it in the part that the inner peripheral surface of 24 ' fe of flat surface and 24 ' R of recess portion intersects, is formed
There is 24 ' Cd of cricoid intersection.In addition, the flat inner surface in the bottom for forming 24 ' R of recess portion, exposing is pressed into attractor
A part for the cricoid shaded-pole coil 27 of 24 ' inside.
In this configuration, it is set as, in the case where attractor 24 ' is excited, is moved in plunger 28 and connecting rod
At the time of preset distance Δ ED, the corner 28Cd and 24 ' Cd of intersection of the cylindrical portion 28te of the small diameter portion of plunger 28 it is closest and
On common plane PL.Being formed in the mutual attraction of small diameter portion of attractor 24 ' and plunger 28 as a result, becomes pole
Greatly.Therefore, at the time of plunger 28 moves preset distance Δ ED, the action of so-called kick start time and be formed in attractor 24 '
And the mutual attraction of small diameter portion of plunger 28 is consistent at the time of become very big.
In Figure 13 B, in the end face of attractor 44 ', the recess portion 48b of 44 ' P of columned protrusion towards plunger 48 is protruded
Scheduled length.The diameter of 44 ' P of protrusion is set as more slightly smaller than the internal diameter of recess portion 48b.The front end face of 44 ' P of protrusion is formed as
It is flat.It is formed with cricoid flat surface around 44 ' P of protrusion.In cricoid flat surface, exposing is pressed into attractor
A part for the cricoid shaded-pole coil 27 of 44 ' inside.
In this configuration, it is set as, in the case where attractor 44 ' is excited, is moved in plunger 48 and connecting rod
At the time of preset distance Δ ED, the front end face of flat surface and 44 ' P of protrusion around the open end of the recess portion 48b of plunger 48
Closest to and on the common plane PL.Being formed in attractor 44 ' and the mutual attraction of plunger 48 as a result, becomes pole
Greatly.Therefore, at the time of plunger 48 moves preset distance Δ ED, the action of so-called kick start time and be formed in attractor 44 '
And the mutual attraction of plunger 48 is consistent at the time of become very big.
In Figure 13 C, in the open end of the 42 ' R of recess portion of attractor 42 ', it is connected with the coniform of 42 ' be of the conical surface
42 ' the BE of end in section.It is formed with the 42 ' Cd of cricoid intersection that the open end of 42 ' be of the conical surface and 42 ' R of recess portion intersects.Taper surface
42 ' be are set as scheduled cone angle identical with the cone angle of the conical surface of end 46TE of aftermentioned plunger 46.
In this configuration, it is set as, in the case where attractor 42 ' is excited, is moved in plunger 46 and connecting rod
At the time of preset distance Δ ED, the corner 46Cd and 42 ' Cd of above-mentioned intersection of the cylindrical portion 46te of the small diameter portion of plunger 46 most connect
Closely and on common plane PL.The mutual attraction of small diameter portion for being formed in attractor 42 ' and plunger 46 as a result, becomes
It obtains greatly.Therefore, at the time of plunger 46 moves preset distance Δ ED, the action of so-called kick start time and be formed in attractor
42 ' and the mutual attraction of plunger 46 it is consistent at the time of become very big.
In addition, attractor 24 by by shaded-pole coil 27 be embedded in attractor 24, so as to AC supply voltage
(AC) corresponding.Direct current power source voltage (DC) can be not limited to that whether there is or not 27 ground of shaded-pole coil to be corresponded to.
Figure 14 outlined the structure of the major part of the second embodiment of the electromagnetic switching valve of the present invention.
In addition, in fig. 14, same symbol is marked for inscape identical with the inscape in example shown in Fig. 2
Number, and omit its repeated explanation.
Electromagnetic switching valve is, for example, four-way electromagnetic switching valve (guiding valve), is configured at the piping of the refrigerant circuit in air conditioner
In.Electromagnetic switching valve includes that following portion is constituted as main element, that is, has connecting rod 20 and can movably configure
In the plunger 28 in plunger tube 36；Include with scheduled movable fit in the valve of the slidingtype in the opening portion 20a of connecting rod 20
Core 52 and constitute and be configured at plunger tube 36 inner peripheral portion the other end valve port switching mechanism portion；To one end of plunger tube 36 into
Capable closed attractor 24；And it is configured at the peripheral part of plunger tube 36 and plunger 28 and attractor 24 is selectively carried out
The solenoid unit of excitation.
The first 36P with the connection of effective pipe for being provided as the first access is formed in the other end of plunger tube 36.In column
It fills in and is formed with spool receiving portion 36A on the inside of the other end of pipe 36.
In the opening portion 20a of connecting rod 20, it can relatively movably be fitted into the spool 52 for having resin.Opening portion 20a
Periphery the moving direction along plunger 28 be dimensioned to it is more slightly larger than the size of corresponding spool 52.As a result, such as Figure 14 institutes
Show, in the case where coil part 15 is not excited, the opening of connecting rod 20 is connected in a square end face of the peripheral surface of spool 52
In the state of the periphery of portion 20a, periphery and the spool 52 of the opening portion 20a of connecting rod 20 peripheral surface another party end face it
Between be formed with scheduled clearance delta ED.Clearance delta ED is corresponding with the idling stopping distance of plunger 28 and connecting rod 20.
The spool 52 of the part in aftermentioned valve port switching mechanism portion is constituted the sliding contact surface 54a's in face of valve seat 54
One square end portion has slot 52G.Slot 52G makes two adjacent mouths of valve seat 54 selectively communicate with.In fig. 14, slot 52G is indicated
The state for making the third mouth 54P2 of valve seat 54 be connected to the 4th mouthful of 54P3.
In addition, in the case where coil part 15 is not excited, the recess portion of the cylindrical portion 28te and attractor 24 of plunger 28
24R is detached.At this point, the corner 28Cd along the cylindrical portion 28te of the small diameter portion of the plunger 28 of the moving direction of plunger 28 and attraction
The mutual distance, delta D of the intersection 24Cd of son 24 is set as roughly the same with above-mentioned scheduled clearance delta ED.
On the other hand, in the case where attractor 24 is excited, cylindrical portion 28te is inserted into the recess portion 24R of attractor 24
It is interior, until being abutted with the inner surface for the bottom surface sections for forming recess portion 24R.
As a result, in the case where attractor 24 is excited, preset distance Δ ED is moved in plunger 28 and connecting rod 20
At the time of, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd is closest and is in jointly
On plane PL, therefore the mutual attraction of the small diameter portion that is formed in attractor 24 and plunger 28 becomes very big.Therefore, plunger
28 at the time of move preset distance Δ ED, so-called kick action start time be formed in the small of attractor 24 and plunger 28
The mutual attraction in diameter portion is consistent at the time of becoming very big.
Valve port switching mechanism portion is configured to：Valve seat 54；The sliding contact surface 54a of valve seat 54 can be slidably configured at
Spool 52；And the sliding contact surface 54a relative to valve seat 54 presses the leaf spring 34 of spool 52 with scheduled pressure.Valve seat 54
It is made by metal material, such as brass, stainless steel, aluminium alloy, and is combined with the inner peripheral surface of plunger tube 36.In plunger tube 36
Following location directly in plunger 28, the spool for being formed with the connecting rod 20 for accommodating plunger 28, spool 52 and valve seat 54 hold
Receive portion 36A.In spool receiving portion 36A, and on the straight line common with the central axis of plunger 28, it is logical that opening is provided as first
The first 36P of one end connection with effective pipe on road.
In addition, in valve seat 54, and be formed on the axis substantially orthogonal with the central axis of plunger 28 and be provided as second
Second mouthful of 54P1 of one end connection with effective pipe of access, it is provided as the third that one end with effective pipe of third path connects
The 4th mouthful of 54P3 that mouth 54P2 and the one end with effective pipe for being provided as fourth passage connect.
In the sliding contact surface 54a for the valve seat 54 that above-mentioned spool 52 is slided along the moving direction of plunger 28, with scheduled pressure
Power abuts the sealing surface 52TS for having spool 52.Pass through the slot of the spool 52 in the sliding contact surface 54a according to valve seat 54 as a result,
The position of 52G makes two mouths in three adjacent mouths of valve seat 54 selectively communicate with, to switch the flowing side of fluid
To.For example, in the case where coil part 15 is not excited, as shown in figure 14, third mouth 54P2 and the 4th mouthful of 54P3 is via spool
52 slot 52G and be connected to, flow to the 4th mouthful of 54P3 from third mouth 54P2 to fluid, and second mouthful is flowed to from first 36P
54P1.On the other hand, in the case where coil part 15 is excited, second mouthful of 54P1 and third mouth 54P2 via spool 52 slot
52G and be connected to, flow to third mouth 54P2 from second mouthful of 54P1 to fluid, and the 4th mouthful of 54P3 is flowed to from first 36P.
Even if in this configuration, in the case where attractor 24 is excited, moved in plunger 28 and connecting rod 20 pre-
At the time of set a distance Δ ED, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd are also closest
And on the common plane PL, therefore the mutual attraction of the small diameter portion that is formed in attractor 24 and plunger 28 becomes pole
Greatly.Therefore, at the time of plunger 28 moves preset distance Δ ED, so-called kick action start time and be formed in attractor 24 with
And the mutual attraction of small diameter portion of plunger 28 is consistent at the time of become very big.
Figure 15 outlined the structure of the major part of the 3rd embodiment of the electromagnetic switching valve of the present invention.
In addition, in fig.15, same symbol is marked for inscape identical with the inscape in example shown in Fig. 2
Number, and omit its repeated explanation.
Electromagnetic switching valve is, for example, threeway electromagnetic switching valve (guiding valve), is configured at the piping of the refrigerant circuit in air conditioner
In.Electromagnetic switching valve includes that following portion is constituted as main element, that is, has connecting rod 20 and can movably configure
In with the plunger 28 in plunger tube 26；With scheduled movable fit in the spool of the slidingtype in the opening portion 20a of connecting rod 20
62；The valve body portion 10 combined with one end of plunger tube 26；Closed attractor 24 is carried out to one end of plunger tube 26；And match
It is placed in the peripheral part of plunger tube 26 and selectively carries out the solenoid unit of excitation to plunger 28 and attractor 24.
In the opening portion 20a of connecting rod 20, it can relatively movably be fitted into the spool 62 for having resin.Opening portion 20a
Periphery the moving direction along plunger 28 be dimensioned to it is more slightly larger than the size of corresponding spool 62.As a result, in coil part
In the case that 15 are not excited, the periphery of the opening portion 20a of connecting rod 20 is connected in a square end face of the peripheral surface of spool 62
In the state of, it is formed between another party end face of the peripheral surface of the periphery and spool 62 of the opening portion 20a of connecting rod 20 pre-
Fixed clearance delta ED.Clearance delta ED is corresponding with the idling stopping distance of plunger 28 and connecting rod 20.
Spool 62 has bossed abutting part 62T in a square end portion of the sliding contact surface 64a in face of valve seat 64.Abutting part
62T closes a mouth of aftermentioned valve seat 64.In fig.15, second mouthful 64P2s of the abutting part 62T to valve seat 64 is indicated
Carry out closed state.
In addition, in the case where coil part 15 is not excited, the recess portion of the cylindrical portion 28te and attractor 24 of plunger 28
24R is detached.At this point, the corner 28Cd along the cylindrical portion 28te of the small diameter portion of the plunger 28 of the moving direction of plunger 28 and attraction
The mutual distance, delta D of the intersection 24Cd of son 24 is set as roughly the same with above-mentioned scheduled clearance delta ED.
On the other hand, in the case where attractor 24 is excited, cylindrical portion 28te is inserted into the recess portion 24R of attractor 24
It is interior, until being abutted with the inner surface for the bottom surface sections for forming recess portion 24R.
As a result, in the case where attractor 24 is excited, preset distance Δ ED is moved in plunger 28 and connecting rod 20
At the time of, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd is closest and is in jointly
On plane PL, therefore the mutual attraction of the small diameter portion that is formed in attractor 24 and plunger 28 becomes very big.Therefore, plunger
28 at the time of move preset distance Δ ED, so-called kick action start time be formed in the small of attractor 24 and plunger 28
The mutual attraction in diameter portion is consistent at the time of becoming very big.
Valve body portion 10 is made by metal material, such as brass, stainless steel, aluminium alloy, has in inside and accommodates plunger
28 connecting rod 20, the spool receiving portion 10A of spool 62 and valve seat 64.In spool receiving portion 10A, and in plunger 28
On the substantially orthogonal axis of mandrel line, the mouth for being formed with one end connection with effective pipe 12 for being provided as the first access (is not schemed
Show).
In addition, in the valve seat 64 being configured in spool receiving portion 10A, and substantially orthogonal with the central axis of plunger 28
It is formed with the mouth 64P1 for one end connection with effective pipe 56 for being provided as alternate path on axis and is provided as third path
The mouth 64P2 of one end connection with effective pipe 58.
In the sliding contact surface 64a for the valve seat 64 that above-mentioned spool 62 is slided along the moving direction of plunger 28, with scheduled pressure
Power abuts the sealing surface for the abutting part 62T for having spool 62.Pass through the spool in the sliding contact surface 64a according to valve seat 64 as a result,
The position of 62 abutting part 62T makes a mouth in two adjacent mouths of valve seat 64 selectively connect in spool receiving portion 10A
It is logical, to switch the flow direction of fluid.For example, in the case where coil part 15 is not excited, as shown in figure 15, pass through spool
The sealing surface counterpart 64P2 of 62 abutting part 62T is closed, to which fluid matches effective pipe 56 from the flow direction of effective pipe 12.It is another
Aspect is closed in the case where coil part 15 is excited by the sealing surface counterpart 64P1 of the abutting part 62T of spool 62,
To which fluid matches effective pipe 58 from the flow direction of effective pipe 12.
Driving mechanism including plunger unit made of plunger 28, connecting rod 20 and spool 62 is configured to include electromagnetic wire
Coil unit, attractor 24 and helical spring 30.
Even if in this configuration, in the case where attractor 24 is excited, moved in plunger 28 and connecting rod 20 pre-
At the time of set a distance Δ ED, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd it is closest and
On common plane PL, therefore the mutual attraction of the small diameter portion that is formed in attractor 24 and plunger 28 becomes pole
Greatly.Therefore, at the time of plunger 28 moves preset distance Δ ED, so-called kick action start time and be formed in attractor 24 with
And the mutual attraction of small diameter portion of plunger 28 is consistent at the time of become very big.
Figure 16 outlined the structure of the major part of the fourth embodiment of the electromagnetic switching valve of the present invention.
In addition, in figure 16, same symbol is marked for inscape identical with the inscape in example shown in Fig. 2
Number, and omit its repeated explanation.
Electromagnetic switching valve is, for example, two-way electromagnetic switching valve (guiding valve), is configured at the piping of the refrigerant circuit in air conditioner
In.Electromagnetic switching valve includes that following portion is constituted as main element, that is, has connecting rod 20 and can movably configure
In the plunger 28 in plunger tube 26；With scheduled movable fit in the spool 66 of the slidingtype in the opening portion 20a of connecting rod 20；
The valve body portion 10 combined with one end of plunger tube 26；Closed attractor 24 is carried out to one end of plunger tube 26；And configuration
In plunger tube 26 peripheral part and the solenoid unit of excitation is selectively carried out to plunger 28 and attractor 24.
In the opening portion 20a of connecting rod 20, it can relatively movably be fitted into the spool 66 for having resin.Opening portion 20a
Periphery the moving direction along plunger 28 be dimensioned to it is more slightly larger than the size of corresponding spool 66.As a result, in coil part
In the case that 15 are not excited, the periphery of the opening portion 20a of connecting rod 20 is connected in a square end face of the peripheral surface of spool 66
In the state of, it is formed between another party end face of the peripheral surface of the periphery and spool 66 of the opening portion 20a of connecting rod 20 pre-
Fixed clearance delta ED.Clearance delta ED is corresponding with the idling stopping distance of plunger 28 and connecting rod 20.
Spool 66 has bossed abutting part 66T in a square end portion of the sliding contact surface 68a in face of valve seat 68.Abutting part
66T closes a mouth 68P of aftermentioned valve seat 68.In figure 16, indicate the sealing surface of abutting part 66T to valve seat 68
Mouth 68P has carried out closed state.
In addition, in the case where coil part 15 is not excited, the recess portion of the cylindrical portion 28te and attractor 24 of plunger 28
24R is detached.At this point, the corner 28Cd along the cylindrical portion 28te of the small diameter portion of the plunger 28 of the moving direction of plunger 28 and attraction
The mutual distance, delta D of the intersection 24Cd of son 24 is set as roughly the same with above-mentioned scheduled clearance delta ED.
On the other hand, in the case where attractor 24 is excited, cylindrical portion 28te is inserted into the recess portion 24R of attractor 24
It is interior, until being abutted with the inner surface for the bottom surface sections for forming recess portion 24R.
As a result, in the case where attractor 24 is excited, preset distance Δ ED is moved in plunger 28 and connecting rod 20
At the time of, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd is closest and is in jointly
On plane PL, therefore the mutual attraction of the small diameter portion that is formed in attractor 24 and plunger 28 becomes very big.Therefore, plunger
28 at the time of move preset distance Δ ED, so-called kick action start time be formed in the small of attractor 24 and plunger 28
The mutual attraction in diameter portion is consistent at the time of becoming very big.
Valve body portion 10 is made by metal material, such as brass, stainless steel, aluminium alloy, has in inside and accommodates plunger
28 connecting rod 20, the spool receiving portion 10A of spool 66 and valve seat 68.In spool receiving portion 10A, and in plunger 28
On the substantially orthogonal axis of mandrel line, the mouth for being formed with one end connection with effective pipe 12 for being provided as the first access (is not schemed
Show).
In addition, in the valve seat 68 being configured in spool receiving portion 10A, and substantially orthogonal with the central axis of plunger 28
On axis, it is formed with the mouth 68P for one end connection with effective pipe 60 for being provided as alternate path.
The sliding contact surface 68a for sliding valve seat 68 along the moving direction of plunger 28 in above-mentioned spool 66, with scheduled pressure
Abut the sealing surface for the abutting part 66T for having spool 66.Supporting according to the spool 66 in the sliding contact surface 68a of valve seat 68 as a result,
The position of socket part 66T selectively closes off a mouth 68P of valve seat 68.As a result, from spool receiving portion 10A towards with effective pipe
The flowing of 60 fluid is cut off.For example, in the case where coil part 15 is not excited, as shown in figure 16, pass through spool 66
The sealing surface counterpart 68P of abutting part 66T is closed, to which cut-out is from spool receiving portion 10A towards the flowing with effective pipe 60.
On the other hand, in the case where coil part 15 is excited, mouthful 68P is made to open wide by the sealing surface of the abutting part 66T of spool 66, from
And fluid is flowed to from spool receiving portion 10A is flowed through with effective pipe 12 with effective pipe 60.
Driving mechanism including plunger unit made of plunger 28, connecting rod 20 and spool 66 is configured to include electromagnetic wire
Coil unit, attractor 24 and helical spring 30.
Even if in this configuration, in the case where attractor 24 is excited, moved in plunger 28 and connecting rod 20 pre-
At the time of set a distance Δ ED, the corner 28Cd of the cylindrical portion 28te of the small diameter portion of plunger 28 and above-mentioned intersection 24Cd it is closest and
On common plane PL, therefore the mutual attraction of the small diameter portion that is formed in attractor 24 and plunger 28 becomes pole
Greatly.Therefore, at the time of plunger 28 moves preset distance Δ ED, so-called kick action start time and be formed in attractor 24 with
And the mutual attraction of small diameter portion of plunger 28 is consistent at the time of become very big.
Claims (4)
1. a kind of electromagnetic switching valve, which is characterized in that have：
There is spool receiving portion the first being connect with the first access and second mouthful connect with alternate path, the spool to hold
Receiving portion will accommodate with the plunger unit of the plunger linked with spool via connecting rod can to move, the spool with this first
Mouthful and this second mouthful connection and control is opened and closed to this second mouthful；And
Plunger unit driving mechanism makes above-mentioned plunger unit carry out to above-mentioned second mouthful of action that control is opened and closed,
In the case where above-mentioned plunger unit driving mechanism does not work, it is formed in the spool guide portion of the opening of above-mentioned connecting rod
The predetermined gap of the moving direction along the plunger between inner peripheral and the peripheral surface of above-mentioned spool be dimensioned to it is following
Apart from equal, which is along the corner of the cylindrical portion of the plunger of the moving direction of above-mentioned plunger and to constitute above-mentioned plunger list
The corner of the end of the attractor of first driving mechanism faced with the corner of the cylindrical portion of above-mentioned plunger it is mutual at a distance from.
2. a kind of electromagnetic switching valve, which is characterized in that have：
Spool receiving portion has the first being connect with the first access, second mouthful and and third being connect with alternate path
The third mouth of access connection, the spool receiving portion accommodate the plunger unit with the plunger linked with spool via connecting rod
For that can move, which is connected to the first, this second mouthful and the third mouth, and makes this second mouthful and the third mouth
In either one selectively communicated with the first；And
Plunger unit driving mechanism, the action for making above-mentioned plunger unit be controlled in the following manner：Make this second mouthful
And either one in the third mouth is selectively communicated with the first,
In the case where above-mentioned plunger unit driving mechanism does not work, it is formed in the spool guide portion of the opening of above-mentioned connecting rod
The predetermined gap of the moving direction along the plunger between inner peripheral and the peripheral surface of above-mentioned spool be dimensioned to it is following
Apart from equal, which is along the corner of the cylindrical portion of the plunger of the moving direction of above-mentioned plunger and to constitute above-mentioned plunger list
The corner of the end of the attractor of first driving mechanism faced with the corner of the cylindrical portion of above-mentioned plunger it is mutual at a distance from.
3. a kind of electromagnetic switching valve, which is characterized in that have：
Spool receiving portion has the first being connect with the first access, second mouthful and third path being connect with alternate path
The third mouth of connection and connect with fourth passage the 4th mouthful, the spool receiving portion will have via connecting rod and and spool
The plunger unit of the plunger of connection accommodates to move, the spool and the first, this second mouthful, the third mouth and this
Four mouthfuls of connections, and the mouth of either one in this second mouthful and the 4th mouthful is made to be selectively communicated with the first, and make
This second mouthful is connected to the third mouth or the third mouth is made to be connected to the 4th mouthful；And
Plunger unit driving mechanism, the action for making above-mentioned plunger unit be controlled in the following manner：Make above-mentioned second
Mouthful and it is 4th mouthful above-mentioned in the mouth of either one selectively communicated with above-mentioned first, and make above-mentioned second mouthful with it is above-mentioned
Third mouth is connected to or the third mouth is made to be connected to the 4th mouthful,
In the case where above-mentioned plunger unit driving mechanism does not work, it is formed in the spool guide portion of the opening of above-mentioned connecting rod
The predetermined gap of the moving direction along the plunger between inner peripheral and the peripheral surface of above-mentioned spool be dimensioned to it is following
Apart from equal, which is along the corner of the cylindrical portion of the plunger of the moving direction of above-mentioned plunger and to constitute above-mentioned plunger list
The corner of the end of the attractor of first driving mechanism faced with the corner of the cylindrical portion of above-mentioned plunger it is mutual at a distance from.
4. electromagnetic switching valve described in any one of claim 1 to 3, which is characterized in that
Above-mentioned attractor has shaded-pole coil in the end of the cylindrical portion in face of above-mentioned plunger.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016015860A JP6404246B2 (en) | 2016-01-29 | 2016-01-29 | Solenoid switching valve |
| JP2016-015860 | 2016-01-29 | ||
| PCT/JP2017/002869 WO2017131135A1 (en) | 2016-01-29 | 2017-01-27 | Electromagnetic switching valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108463662A true CN108463662A (en) | 2018-08-28 |
| CN108463662B CN108463662B (en) | 2019-10-15 |
Family
ID=59398479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780007002.5A Active CN108463662B (en) | 2016-01-29 | 2017-01-27 | Electromagnetic switching valve |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6404246B2 (en) |
| CN (1) | CN108463662B (en) |
| WO (1) | WO2017131135A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765269B (en) * | 2019-04-01 | 2021-08-24 | 浙江盾安禾田金属有限公司 | Switching valve and refrigerating system with same |
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2016
- 2016-01-29 JP JP2016015860A patent/JP6404246B2/en active Active
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- 2017-01-27 WO PCT/JP2017/002869 patent/WO2017131135A1/en active Application Filing
- 2017-01-27 CN CN201780007002.5A patent/CN108463662B/en active Active
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|---|---|---|---|---|
| EP0132030B1 (en) * | 1983-06-20 | 1989-08-30 | Borg-Warner Corporation | Proportional solenoid valve |
| JPH10246342A (en) * | 1997-03-06 | 1998-09-14 | Kawasaki Heavy Ind Ltd | Pilot valve |
| CN1270289A (en) * | 1999-04-14 | 2000-10-18 | Smc株式会社 | Directional control valve |
| CN1314558A (en) * | 2000-03-17 | 2001-09-26 | Smc株式会社 | Electromagnetic valve |
| CN1432746A (en) * | 2001-11-01 | 2003-07-30 | 株式会社不二工机 | Solenoid valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2017131135A1 (en) | 2017-08-03 |
| JP6404246B2 (en) | 2018-10-10 |
| CN108463662B (en) | 2019-10-15 |
| JP2017133663A (en) | 2017-08-03 |
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