CN1081770C

CN1081770C - Electromagnetic valve

Info

Publication number: CN1081770C
Application number: CN99106434A
Authority: CN
Inventors: 今久保贤治
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1998-04-28
Filing date: 1999-04-28
Publication date: 2002-03-27
Anticipated expiration: 2019-04-28
Also published as: CN1233721A; JP3493133B2; JPH11311361A; TW397908B; KR19990083304A; KR100313169B1

Abstract

The present invention provides a electromagnetic valve to minimize the sound generated when the valve body hits the aspirating unit. First and second coil springs 28, 29 are interposed between the valve body 27 equipped within the valve chamber 16 and the first and second aspirating units 14, 15. When valve body 27 moves toward the first aspirating unit 14 and a positive voltage is applied to the solenoid 17, if the immediate voltage rising time is about 5 seconds, then the valve body 27 can be gradually moved against the spring force of the coil springs 28, 29. The impact sound for the valve body 27 and the first aspirating unit 14 is reduced. When the valve body 27 moves toward to the second aspirating unit 15 and a negative voltage is applied to the solenoid 17, if the immediate voltage rising time is about 5 seconds, then the valve body 27 can be gradually moved. The impact sound for the valve body 27 and the second aspirating unit 15 is reduced.

Description

Solenoid valve

The magnetic field that the present invention relates to utilize solenoid to produce moves valve body and solenoid valve fluid flowing path is open or that cut off.

As everyone knows, when solenoid valve is switched at solenoid, because the suction that described solenoid produces, valve body overcome application of force means the power that applies and to attracting the part side shifting, when described solenoid no electric circuit, because the power that applies of application of force means, described valve body moves to the direction opposite with attracting part.Open and close the stream of fluid therefrom, or the flow direction of switch fluids.For example in the freeze cycle of refrigerator, for the stream that opens and closes refrigeration agent or switch flow direction, also be provided with such solenoid valve in the part midway of pipe for flowing of refrigerant.

Above-mentioned solenoid valve is by applying certain setting voltage to solenoid, valve body just is attracted in moment.Therefore, valve body as old boots collides with attracting part, for example from solenoid valve 5cm place, can produce 80-90dB (A) bigger collision sound like this.Especially be configured in indoor device like this for refrigerator, the collision sound of valve body is very ear-piercing, wishes quietization.

Therefore, the objective of the invention is to, provide a kind of the sound that valve body produces when attracting the part collision can be fallen very low solenoid valve.

The solenoid valve of claim 1 of the present invention comprises: valve body; Leaving the compartment of terrain vertically is located in this valve body to form the 1st and the 2nd attraction part of valve chamber; Be located in the described valve chamber, attract the part side shifting fluid flowing path to be opened wide, attract the part side shifting and valve body that fluid flowing path is cut off by application of force means to the described the 2nd to the described the 1st; Producing magnetic field makes described valve body overcome the power that applies of described application of force means and mobile solenoid; The voltage that described solenoid is applied voltage applies means; And, put on described solenoidal voltage and rise to the control device that the rise time till the setting voltage controls apply means by this voltage, and, when described solenoid being applied arbitrarily voltage, the power that applies that acts on described valve body moves the variance ratio of generation and attracts the magnetic force between part and the described valve body big with the variance ratio that described valve body moves generation than acting on the described the 1st with described valve body.

The power that applies that acts on valve body attracts the part side along with valve body near the 1st and increases.To this, the magnetic force that acts on valve body attracts part along with valve body near the 1st and increases, and, then increase if improve the solenoidal voltage that applies.Like this, along with moving of valve body, the ratio that the power of applying changes is bigger than the ratio that magnetic force changes, and by solenoid being applied voltage arbitrarily, just can make the power of applying and magnetic balanced valve body position generation variation arbitrarily.Specifically be, increase that magnetic force just attracts the part side near the 1st with the position of the valve body that applies equilibrium of forces if apply voltage.Therefore,, apply rise time of voltage, just the speed that moves of control valve body at random by control at random if adopt above-mentioned formation.

In addition, the solenoid valve of claim 2 of the present invention comprises: valve body; Leaving the compartment of terrain vertically is located in this valve body to form the 1st and the 2nd attraction part of valve chamber; By application of force means be located in the described valve chamber, to the described the 1st attract the part side shifting and the fluid flowing path of a side is cut off and the fluid flowing path of opposite side is opened wide, to the described the 2nd valve body that attracts the part side shifting that the fluid flowing path of one side is opened wide and the fluid flowing path of opposite side is cut off; Producing magnetic field makes described valve body overcome the power that applies of described application of force means and mobile solenoid; The voltage that described solenoid is applied voltage applies means; And, put on described solenoidal voltage and rise to the control device that the rise time till the setting voltage controls apply means by this voltage, and, when voltage put on described solenoid arbitrarily, the power that applies that acts on described valve body moved the variance ratio of generation and attracts the magnetic force between part and the described valve body big with the variance ratio that described valve body moves generation than acting on the described the 1st with described valve body.

At this moment, require 1 invention the same with aforesaid right, apply rise time of voltage, at random the speed that moves of control valve body by control at random.

In addition, under the situation of above-mentioned formation, also can be constructed as follows: attract the 1st and the 2nd application of force means between the part to constitute described application of force means by being located at valve body and the 1st and the 2nd, and be provided with permanent magnet, this magnet forms the magnetic circuit by the 1st and the 2nd attraction part, keep described valve body to be resisted against the described the 1st and attract the state of part, and keep valve body be resisted against the described the 2nd state (invention of claim 3) that attracts part,

If adopt such formation, with the 1st or the 2nd attract part against valve body utilize the magnetic force of permanent magnet can be held against state, therefore, as long as when valve body is moved to described solenoid energising, can save electric power.

In addition, in the solenoid valve of above-mentioned formation, described control device also can be controlled voltage and apply means, makes rise time of applying voltage be the long time, makes valve body overcome the applying power of application of force means gradually and moves (invention of claim 4).

If adopt such formation, because valve body is moved more lentamente, so can suppress the solenoid valve action time, the sound of valve body and attraction part collision generation.

Have again, if the pipeline of communication of fluid stream and valve chamber and the movement direction of valve body are located at valve body orthogonally, compare during with the axial end portion that pipeline is connected valve body, can dwindle structure, realization miniaturization (invention of claim 5).

Brief description.

Fig. 1 illustrates the 1st embodiment of solenoid valve of the present invention, is the longitudinal section along the solenoid valve of the X-X line among Fig. 2.

Fig. 2 is the plan view of solenoid valve.

Fig. 3 is for illustrating the figure of the electric formation of refrigerator with the function block compound mode.

Fig. 4 is the performance plot that the relation of valve body position and spring force and magnetic force is shown.

Fig. 5 is the oscillogram that puts on solenoidal voltage.

Fig. 6 is the figure of explanation solenoid valve action usefulness.

Fig. 7 is the freeze cycle pie graph.

Fig. 8 illustrates figure solenoid valve the 2nd embodiment of the present invention, suitable with Fig. 1 (along the longitudinal section of the Y-Y line among Fig. 9).

Fig. 9 is the figure suitable with Fig. 2.

Figure 10 is the figure suitable with Fig. 4.

Figure 11 is the figure suitable with Fig. 6.

Figure 12 illustrates figure solenoid valve the 3rd embodiment of the present invention, suitable with Fig. 1 (along the longitudinal section of the Z-Z line among Figure 13).

Figure 13 is the figure suitable with Fig. 2.

In the drawings, 9 is pipe for flowing of refrigerant (fluid flowing path), and 11 are bypass pipe for flowing of refrigerant (fluid flowing path), 12,50,61 is solenoid valve, 13 is valve body, and 14 is the 1st attraction part, and 15 is the 2nd attraction part, 16 is valve chamber, 17 is solenoid, and 22 is inlet duct, and 23 is the 1st outer pipe, 24 is the 2nd outer pipe, 27 is valve body, and 28 is the 1st helical spring (application of force means), and 29 is the 2nd helical spring (application of force means), 32 are spherical valve core helical spring (application of force means), 34 is permanent magnet, and 35 is control gear (control device), and 42 for driving loop (voltage applies means), 51 is outer pipe, and 62 is helical spring (application of force means).

Followingly the 1st embodiment of the present invention is described with reference to Fig. 1-Fig. 7.Present embodiment is applicable to the freeze cycle of refrigerator, and the formation of freeze cycle at first is described with reference to Fig. 7.

As shown in Figure 7, in the refrigerator of present embodiment, the compressor 2 in the freeze cycle 1, condenser 3, exsiccator 4, capillary tube 5, cold storage room are that pipe for flowing of refrigerant 9 be connected with vaporizer (to call the F vaporizer in the following text) 7 and gas receiver 8 by fluid flowing path with vaporizer (to call the R vaporizer in the following text) 6, refrigerating chamber.

In described freeze cycle 1, described relatively capillary tube 5 and R vaporizer 6 are provided with bypass pipe for flowing of refrigerant 10 and capillary tube 11 as fluid flowing path side by side.And the component of the pipe for flowing of refrigerant of using in described pipe for flowing of refrigerant 10 and bypass 11, be provided with solenoid valve 12 of the present invention.Below see figures.1.and.2, the concrete formation of solenoid valve 12 is described.

Fig. 1 is the longitudinal section of solenoid valve 12, and Fig. 2 is a plan view.At first as shown in Figure 1, be nonmagnetic material cylindraceous for example the axial two end part of the valve body 13 made of brass be pressed into magnetic for example iron make the 1st and the 2nd attract part 14 and 15.Thus, at the valve body 13 inner valve chambers 16 that form.In addition, attract to be positioned on the part on valve body 13 tops in the part 14, be with pipeline 18, on the outer peripheral portion of this pipeline 18,, solenoid 17 is housed by coil rack 17a the described the 1st.

In addition, on valve body 13, leave the compartment of terrain vertically and be formed with 3 19-21 of hole portion.The hole portion 20 of the centre among these 3 19-21 of hole portion is connected with valve chamber 16, and corresponding with this hole portion 20, inlet duct 22 is connected on the outer circumferential face of valve body 13.The hole portion 19 that is positioned at the top attracts the path 14a of part 14 to be connected with described valve chamber 16 by being formed at the 1st, with described hole portion 19 accordingly, on the outer circumferential face of valve body 13, connecting the 1st outer pipe 23.The hole portion 21 that is positioned at the below attracts the path 15a of part 15 to be connected with described valve chamber 13 by being formed at the 2nd, and is corresponding with described hole portion 21, connecting the 2nd outer pipe 24 on the outer circumferential face of valve body 13.

As shown in Figure 7, inlet duct 22 is connected towards the end of the pipe for flowing of refrigerant 9 of exsiccator 4.In addition, the 1st outer pipe 23 is connected the end of bypass with pipe for flowing of refrigerant 10, and the 2nd outer pipe 24 is connected towards the end of the pipe for flowing of refrigerant 9 of R vaporizer 6.

And for example shown in Figure 1, the 1st attracts valve chamber 16 side ends of part 14 to be convex, at the edge of opening place of the described path 14a of this end, is fixed with for example valve seat 25 made of brass of nonmagnetic material.Also have, the 2nd attracts valve chamber 16 side ends of part 15 to be convex, at the edge of opening place of the described path 15a of this end, is fixed with for example valve seat 26 made of brass of nonmagnetic material.

On the other hand, in described valve chamber 16, (in Fig. 1, be above-below direction) vertically and be provided with magnetic valve body 27 for example made of iron movably.Attract between the

part

14 and 15 at this valve body 27 and the 1st and the 2nd, be respectively equipped with the 1st and the 2nd helical spring 28 and 29 as application of force means, utilize the spring force (applying power) of the 1st and the 2nd helical spring 28 and 29, valve body 27 is applied in upwards and about equally active force downwards.

Can understand that by the Action Specification that the back is detailed in case with the power of the spring force of described helical spring 28 and 29 antagonism, push valve body 27 the to 1st and attract the power of part 14 sides to work, valve body 27 promptly moves to the 1st and attracts part 14 sides, 14a closes with path.In addition, in case with the power of the spring force of described helical spring 28 and 29 antagonism, push valve body 27 the to 2nd and attract the power of part 15 sides to work, then described valve body 27 moves to the 2nd and attracts part 15 sides, and 15a closes with path.

By the way, the section shape of valve body 27 for example is hexagon, makes between itself and the valve body 13 gapped.Therefore, the refrigeration agent that flows into from inlet duct 22 flows in the valve chamber 16 by this gap.

In addition, be provided with spherical valve core 30 for example made of iron and 31 at the axial two end part of described valve body 27.Between these spherical valve cores 30,31, be provided with spherical valve core helical spring 32 as application of force means, when elastic force owing to this helical spring 32, valve body 27 and the 1st and the 2nd attract

part

14 and 15 against the time, spherical valve core 30,31 and valve seat 25,26 against, path 14a, 15a tightness are closed.

And for example shown in Figure 2 around valve body 13 and solenoid 17, be provided with the iron housing 33 of roughly rectangular frame shape.This housing 33 is made of the tabular component 33b that U character form component 33a is connected with end with this U character form component 33a.And, connecting the 1st upper end portion that attracts part 14 in the substantial middle part of the top of described housing 33 one, and connecting the 2nd underpart that attracts part 15 in the substantial middle portion of the following portion of described housing 33.

Also have, on described housing 33, fixing 2

permanent magnets

34,34 of described valve body 13 configurations of sandwich, the end that this

permanent magnet

34,34 is configured to housing 33 sides is the N utmost point, and the end of valve body 13 sides is the S utmost point.Form the magnetic circuit that attracts part 14, valve body 27, permanent magnet 34 to constitute by permanent magnet 34, housing the 33, the 1st thus and reach the magnetic circuit that attracts part 15, valve body 27, permanent magnet 34 to constitute by permanent magnet 34, housing the 33, the 2nd.

At this moment, the magnetic force of described permanent magnet 34 is set at when valve body 27 and is resisted against the 1st or the 2nd when attracting on the

part

14 or 15, can overcome the elastic force of the 1st and the 2nd helical spring 28 and 29 and keeps this against state.

Yet described permanent magnet 34 is configured in from the distance of permanent magnet 34 till housing 33 to the 2nd attracts part 15 than the short position of distance that attracts part 14 from permanent magnet 34 through housing 33 to the 1st.Therefore, when housing 33 is made of a member, will occurs the 2nd and attract the magnetic pole strong phenomenon of the magnetic pole of part 15 than the 1st attraction part 14.But, in the present embodiment, constitute housing 33, and the connection part of this two

member

33a, 33b attracted between the part 15 at permanent magnet 34 and the 2nd by U character form component 33a and tabular component 33b.Therefore make and attract

part

14 and 15 pole strengths that produce about equally by the 1st and the 2nd.

Fig. 3 has made diagram with the electric formation of the refrigerator that present embodiment relates to the form of function block combination.In this Fig. 3, for example by being that main circuit constitutes with the microcomputer, connecting R temperature transducer 36 that detects temperature of refrigerating chamber and the F temperature transducer 37 that detects freezer temperature as the control gear 35 of control device.In addition, on the described control gear 35, connecting the F vaporizer temperature transducer 39 that the R vaporizer that detects R vaporizer 6 temperature is used temperature transducer 38 and detected F vaporizer 7 temperature.

Have again, on the described control gear 35, also connecting compressor 2, R vaporizer 6 usefulness cooling fan motor 40, F vaporizer 7 usefulness cooling fan motor 41 and solenoid valves 12 by driving loop 42.Described each mechanism is by being stored in the control program in the described control gear 35 and controlling from the input signal of described each temperature transducer 36-39.

At this moment, when described control gear 35 applies voltage at the solenoid 17 that drives the 42 pairs of solenoid valves 12 in loop, make this voltage reach that rise time T1 is the long period till certain setting voltage, be specially about 5 seconds.Therefore, described driving loop 42 is played voltage and is applied means.At this moment, T1 of above-mentioned rise time sets according to following thinking methods.

Fig. 4 is the performance plot that the relation of the position of valve body 27 of solenoid valve 12 of above-mentioned formation and spring force and magnetic force is shown.In the position of this so-called valve body 27 is to attract the distance of part to valve body 27 from the 1st.Specifically be that when " 0.45mm ", valve body 27 is positioned at from the 1st and attracts part and the 2nd to attract the position (to call the neutral position in the following text) of

part

14,15 equidistances.In addition, the spherical valve core 30 of " 0.4mm " expression valve body 27 and valve seat 26 against state, when " 0.4mm-0mm ", spherical valve core 30 falls in the valve body 27 gradually, valve body 27 attracts parts 14 near the 1st.When " 0mm ", valve body 27 and the 1st attracts part 14 to fit tightly substantially fully again.

In addition, spring force is the synthetic spring force that the 1st, the 2nd helical spring 28 and 29, spherical valve core are used helical spring 32, and A represents with straight line.In addition, described magnetic force is to act on the synthetic magnetic force that is attracted between part 14 and the valve body 27 by permanent magnet 34 and solenoid 17 the magnetized the 1st, and 1-B7 represents with curve B.Again, curve B 1-B7 represent respectively when described solenoid 17 apply that voltage is 0,2,4,6,8,10, synthetic magnetic force during 12V.In the present embodiment, as shown in Figure 4, the inclination of straight line A that adopts the sort of its spring force of expression is than the also big helical spring 28,29 of inclination of curve B 1-B7 of expression magnetic force.

As mentioned above, valve body 27 is maintained a neutral position by the 1st and the 2nd helical spring 28 and 29.Therefore, in case valve body 27 moves (that is, in case the position of valve body 27 is near " 0 ") along the direction near the 1st attraction part 14, promptly produce a power that valve body 27 is retracted the neutral position with its amount of movement with being directly proportional.Therefore, along with the position close " 0 " of valve body 27, spring force increases.

On the other hand, act on the 1st square being inversely proportional to of distance that attracts magnetic force and the 1st attraction part 14 and valve body 27 between part 14 and the valve body 27.In addition, acting on the 1st attracts the magnetic force between part 14 and the valve body 27 to increase with the voltage swing that puts on solenoid 17.At this moment, because represent that the inclination of straight line A of above-mentioned spring force is bigger, as shown in Figure 4 described than the inclination of curve B 1-B7 of expression magnetic force, straight line A and curve B 1-B7 intersect.Its intersection point (in Fig. 4, illustrating) expression spring force and magnetic balanced with C1-C7.For example when applying voltage and be 8V, valve body 27 is positioned at when the 1st attracts the distance of part 14 to be 0.2mm, magnetic force and spring force balance.

In addition, making valve body 27 and the 1st attract part 14 is that setting voltage is 12V as can be seen from Figure 4 against the necessary voltage that applies.But if will apply voltage in moment is increased to 12V, then attract part 14 because valve body 27 moves to the 1st quickly, so valve body 27 dashes attract part 14 collisions with the 1st puredee, the result produces bigger sound.

In contrast, if at first solenoid 17 is applied the voltage of 2V, then valve body 27 moves to the position that magnetic force surpasses the intersection point C2 of spring force.In case and valve body 27 arrives the position of intersection point C2, then because of magnetic force and spring force balance, so valve body 27 keeps these positions.Then, if solenoid 17 is applied voltage is increased to 4V, then because magnetic force surpasses spring force once more, so valve body 27 moves to the position of the intersection point C3 of straight line A and curve B 3.Below similarly will apply voltage and be increased to 12V successively, and just can make valve body 27 move to next intersection point, last valve body 27 and the 1st attraction part 14 against.

Promptly, gradually improve the voltage that applies of solenoid 17 according to the position, make magnetic force surpass the spring force that acts on valve body 27 slightly, in other words, prolong the rise time T1 apply till voltage reaches 12V, valve body 27 just gradually the limit overcome the spring force limit and move to the 1st and attract part 14 sides.

On the other hand, if rise time T1 is oversize, then exist consume that electric power increases, solenoid 17 heatings and shortcoming that temperature rises.Therefore in the present embodiment, above-mentioned rise time T1 is set at about 5 seconds.According to the inventor's investigation, when rise time T1 was 5 seconds, the sound that valve body 27 and the 1st sends when attracting part 14 collisions was having the 5cm place to be about 50-60db (A) from solenoid valve 12, compare and can reduce with existing 80-90db (A).

In addition, at this valve body 27 is moved to the 1st and attract the situation of part 14 to be illustrated, the situation when moving to the 2nd attraction part 15 sides is also identical.

The effect of above-mentioned formation then is described with reference to Fig. 6.At first, be set under the A-stage, shown in Fig. 6 (a), valve body 27 and the 2nd attract part 15 against.At this moment, solenoid 17 is not applied voltage, but utilize the magnetic force of permanent magnet 34 keep the 2nd attract part 15 and valve body 27 against state.In addition, the magnetic field of permanent magnet 34 generations is represented with arrow P 1 and P2.

Suppose that present compressor 2 is turning round, because valve body 27 and the 2nd attracts part 15 to abut against, supply with pipe for flowing of refrigerant 10 supply capillary tube 11 and F vaporizers 7 in the valve chambers 16, that use through bypass from the 1st outer pipe 23 from the refrigeration agent of condenser 3 through inlet duct 22.

Under this state, if the R vaporizer uses the detected temperatures of temperature transducer 38 to surpass setting temperature, then control gear 35 controlling and driving loops 42 apply voltage to solenoid 17.At this moment, flow through the electric current that is oriented meeting generation direction magnetic field shown in Fig. 6 (b) arrow Q1 in the solenoid 17, for example apply the voltage of such waveform shown in Fig. 5 (a).Therefore, among magnetic field P1, the P2 that produces by permanent magnet shown in Fig. 6 (a) 34, attract the magnetic field P1 of part 14 to be reinforced by the 1st, attract the magnetic field P2 of part 15 to be weakened by the 2nd.As a result, valve body 27 attracts part 14 side shiftings to the 1st.

At this moment, be set at about 5 seconds, so valve body 27 attracts part 14 side shiftings to the 1st gradually because will apply the rise time T1 that voltage rises to 12V.So, when applying voltage and reach 12V, valve body 27 and the 1st attract part 14 against.In addition, applying voltage keeps disconnecting after about 1 second under the state of 12V.

So the arrow P 1 that is produced by permanent magnet 34, the magnetic field of P2 direction take place in solenoid valve 12 once more, shown in Fig. 6 (c), valve body 27 keep with the 1st attract part 14 against state.So the 1st attracts the path 14a of part 14 to be cut off, the refrigeration agent in the valve chamber 16 is supplied with R vaporizer 6 and F vaporizer 7 from the 2nd outer pipe 24 through pipe for flowing of refrigerant 9.

If the R vaporizer is lower than setting temperature with the detected temperatures of temperature transducer 38, then control gear 35 controlling and driving loops 42 apply voltage to solenoid 17.At this moment, solenoid 17 is applied and makes valve body 27 opposite voltage when the 1st attracts part 14 side shiftings, that is, apply shown in Fig. 5 (b) voltage of waveform like that.Therefore, shown in Fig. 6 (d), produce the magnetic field of direction shown in the arrow Q2.So, among the magnetic field P1, the P2 that produce by permanent magnet 34, attract the magnetic field P1 of part 14 to be weakened by the 1st, attract the magnetic field P2 of part 15 to be reinforced by the 2nd.So valve body 27 attracts part 15 side shiftings to the 2nd.

This moment, the rise time T1 of voltage also was set at about 5 seconds, and therefore, valve body 27 attracts part 15 side shiftings to the 2nd gradually.And, when solenoid 17 apply voltage reach 12V, valve body 27 and the 2nd attract part 15 against the time, this voltage keeps disconnecting after about 1 second.

If adopt aforesaid present embodiment, because the rise time T1 that applies voltage of solenoid 17 is set at 5 seconds, make valve body 27 move to the 1st and the 2nd more lentamente and attract

part

14,15 sides, so, the bruit de froissement that valve body 27 and the 1st or the 2nd attracts

part

14 or 15 can be suppressed.

And in the present embodiment, utilize the magnetic field that produces by permanent magnet 34, even solenoid 17 is not applied voltage, valve body 27 also can keep with the 1st, the 2nd attract

part

14,15 against state.Therefore,, that is,, solenoid 17 is applied voltage get final product, can save electric power as long as when valve body 27 is moved as long as when switching the flow direction of refrigeration agent.

Yet, if being arranged at the 1st and the 2nd,

outer pipe

23,24 attract

part

14,15 and the edge direction identical to extend with the movement direction of valve body 27, the axial dimension of whole solenoid valve 12 can increase.The the 1st, the 2nd

outer pipe

23,24 is located at valve body 13 outer circumferential faces and is made it and the movement direction quadrature of valve body 27, so can reduce the structure of solenoid valve 12, makes its small compact but in the present embodiment.

Fig. 8-Figure 11 shows the 2nd embodiment of the present invention, in this explanation and above-mentioned the 1st embodiment's difference.The part identical with the 1st embodiment put on identical symbol.At first, the freeze cycle of present embodiment constitutes as shown in figure 11.That is, solenoid valve 50 by be located at pipe for flowing of refrigerant 9 midway the Twoway valves at position constitute.Specifically, on valve body 13, be provided with the hole portion that is communicated with valve chamber 16, on the outer circumferential face of valve body 13, be connected inlet duct 22 accordingly with this hole portion as Fig. 8 and shown in Figure 9.This inlet duct 22 is connected in the end of the pipe for flowing of refrigerant 9 that communicates with the outlet side of exsiccator 4.In addition, attract to be provided with the path 15a that extends vertically towards valve chamber 16 in the part 15 the 2nd, 15a is corresponding with this path, attracts the end face portion of part 15 to be provided with outer pipe 51 the 2nd.The end that is connecting the pipe for flowing of refrigerant 9 that communicates with the inlet side of capillary tube 5 on this outer pipe 51.

To such structure, spherical valve core 52 is being fixed in the end of the 2nd attraction part 15 sides among the axial two end part of valve body 27.This occasion, described spherical valve core 52 is disposed in the penetration hole 27a that runs through vertically within the described valve body 27, and is pressed into the fixedly sealing component 27b of spherical valve core 52 usefulness in described penetration hole 27a.

The relation of position, magnetic force and the spring force of the valve body 27 of the solenoid valve 50 of above-mentioned formation as shown in figure 10.In addition, basic identical because other constitutes with the 1st embodiment's solenoid valve 12, so omit explanation.

In the present embodiment, in case attract part 14 sides because valve body 27 moves to the 1st, the 2nd attracts the path 15a of part 15 just open, so the refrigeration agent in the valve chamber 16 is just supplied with capillary tube 5, R vaporizer 6, F vaporizer 7 through outer pipe 51.On the other hand, if valve body 27 to the 2nd valve seat 26 that attracts part 15 side shiftings, spherical valve core 52 and the 2nd attraction part 15 against, then path 15a is closed.Therefore, outer pipe 51 is cut off with the circulation of inlet duct 22, supplies with capillary tube 11 and F vaporizer 7 from the pipe for flowing of refrigerant 10 that the refrigeration agent of condenser 3 is used through bypass.

Therefore, the present embodiment of this spline structure also can obtain the identical action effect with above-mentioned the 1st embodiment.In addition in the present embodiment, outer pipe 51 is located at the 2nd and is attracted part 15, but the same with above-mentioned the 1st embodiment, the structure that outer pipe 51 is connected in the outer circumferential face of valve body 13 also is good structure.This occasion also can shorten the axial dimension of whole solenoid valve 50.

In addition, in the above-mentioned the 1st and the 2nd embodiment, even also can not utilize permanent magnet 34 to keep valve body 27 and the 1st and the 2nd to attract

part

14,15 to be illustrated against self-maintenance solenoid valve state, so-called to solenoid 17 not being applied voltage.But as Figure 12 and the 3rd embodiment shown in Figure 13, do not establish the oneself and keep solenoid valve 61, can reduce the bruit de froissement of valve body 27 yet with permanent magnet.

That is, in above-mentioned solenoid valve 61, only attract to be provided as between the part 14 helical spring 62 of application of force means at valve body 27 and the 1st.Such solenoid valve 61, when solenoid 17 energisings, valve body 27 overcomes the spring force of described helical spring 62 and is attracted by the 1st attraction part 14, makes path 15a open.On the other hand, when solenoid 17 no electric circuits because the spring force of helical spring 62, valve body 27 bounce-backs and with the 2nd attract part 15 against, 15a closes with path.That is, in the described path 15a operating period, described solenoid 17 is leading to.

Therefore, present embodiment is the same with the above-mentioned the 1st and the 2nd embodiment, is extended for about 5 seconds by the rise time T1 that makes the voltage that puts on solenoid 17, also can make valve body 27 move to the 1st gradually and attract part 14 sides.By the way, when solenoid 17 outage, apply voltage and drop to " 0 " in moment even make, owing to residue in the 1st effect that attracts the remaining magnetic of part 14, valve body 27 can not move to the 2nd quickly yet and attract part 15 sides.But this occasion, if make fall time of applying voltage than in the past prolongation, the sound in the time of also reducing valve body 27 and collide with the 2nd attraction part 15.

In addition in the present embodiment, the solenoid valve that Twoway valves is constituted is illustrated, but during with three-way valve too.In above-mentioned the 3rd embodiment, also can omit housing 33 in addition.

Have again, in the above-mentioned the 1st and the 2nd embodiment, utilize permanent magnet 34 to make the 1st and the 2nd to attract pole strength that

part

14,15 produces about equally.But, even the 1st and the 2nd attract the intensity of the magnetic pole that

part

14,15 produces unequal, apply the size of voltage by adjusting, valve body 27 is moved.Also have, the end that permanent magnet 34 also can be configured to housing 33 sides is the S utmost point, and the end of valve body 13 sides is the N utmost point.

In addition, the present invention is not restricted to the described embodiments, and for example is not limited to freeze cycle, can be widely used in being located at the solenoid valve of other fluid flowing path etc. yet, in the scope that does not break away from main points of the present invention, can do allly to implement after changing.

As seen from the above description, solenoid valve of the present invention is provided with and puts on solenoidal voltage and rise to the control device that the rise time till the setting voltage controls applied means by voltage, and, when described solenoid being applied arbitrarily voltage, the power that applies that acts on described valve body moves the variance ratio of generation and attracts the magnetic force between part and the valve body big with the variance ratio that described valve body moves generation than acting on the 1st with described valve body.So can receive good like this effect: by make the rise time that applies voltage long, make valve body move to the 1st gradually to attract part or the 2nd to attract the part side sound of generation in the time of just reducing valve body and the 1st and attract part or the 2nd to attract part to collide.

Claims

1. solenoid valve is characterized in that comprising:

Valve body;

Leaving the compartment of terrain vertically is located in this valve body to form the 1st and the 2nd attraction part of valve chamber;

Be located in the described valve chamber, attract the part side shifting fluid flowing path open, to be attracted the part side shifting and with the valve body of fluid flowing path cut-out by application of force means to the described the 2nd to the described the 1st;

Producing magnetic field makes described valve body overcome the power that applies of described application of force means and mobile solenoid;

The voltage that described solenoid is applied voltage applies means; And,

Put on described solenoidal voltage and rise to the control device that the rise time till the setting voltage controls apply means by this voltage, and,

When described solenoid being applied arbitrarily voltage, the power that applies that acts on described valve body moves the variance ratio of generation and attracts the magnetic force between part and the described valve body big with the variance ratio that described valve body moves generation than acting on the described the 1st with described valve body.

2. solenoid valve is characterized in that comprising:

Valve body;

Be located in the described valve chamber, attract the part side shifting and the fluid flowing path of a side is cut off and the fluid flowing path of opposite side open, is attracted the part side shifting that the fluid flowing path of one side is opened and with the valve body of the fluid flowing path cut-out of opposite side by application of force means to the described the 2nd to the described the 1st;

The voltage that described solenoid is applied voltage applies means; And,

3. solenoid valve according to claim 1 and 2 is characterized in that,

Attract the 1st and the 2nd application of force means between the part to constitute described application of force means by being located at valve body and the 1st and the 2nd,

And be provided with permanent magnet, this magnet forms the magnetic circuit that attracts part by the 1st and the 2nd, keep described valve body and the described the 1st attract part against state, and keep valve body and described the 2nd attraction part against state,

4. solenoid valve according to claim 1 and 2 is characterized in that, described control device control voltage applies means, makes the rise time that applies voltage be the long time, makes valve body overcome the applying power of application of force means gradually and moves.

5. solenoid valve according to claim 1 and 2 is characterized in that, the pipeline of communication of fluid stream and valve chamber and the movement direction of valve body are located at valve body orthogonally.