CN101737546A - Electromagnetic valve and preparing method - Google Patents
Electromagnetic valve and preparing method Download PDFInfo
- Publication number
- CN101737546A CN101737546A CN200810177599A CN200810177599A CN101737546A CN 101737546 A CN101737546 A CN 101737546A CN 200810177599 A CN200810177599 A CN 200810177599A CN 200810177599 A CN200810177599 A CN 200810177599A CN 101737546 A CN101737546 A CN 101737546A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic coil
- solenoid valve
- magnetic component
- conducting magnetic
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention provides an electromagnetic valve which comprises an electromagnetic coil and a valve core, wherein the valve core is arranged in the electromagnetic coil. Under the function of the electromagnetic coil, the valve core moves to enable the electromagnetic valve to conduct or close. A conducting magnetic component made of conducting magnetic material is arranged outside the electromagnetic coil, and comprises a top component, a bottom component and a side component, wherein the top component and the bottom component are arranged at both ends of the electromagnetic coil; the side component is connected with the top component and the bottom component. The electromagnetic valve also comprises an outer casing made of non-magnetic material. As the magnetic resistance of a magnetic conductor is far smaller than the magnetic resistance of air, the magnetic line generated by the electromagnetic coil can effectively return into the electromagnetic coil, and the attraction force of the electromagnetic valve on the vale core is enhanced, thereby decreasing the power of the electromagnetic valve, reducing the heat generation, delaying the aging of the insulation material, and effectively prolonging the service life of the electromagnetic valve.
Description
Technical field
The present invention relates to a kind of valve, relate in particular to a kind of solenoid valve and preparation method.
Background technique
Solenoid valve is widely used in hydraulic pressure, vacuum, combustion gas transmission and the refrigeration system, and important effect is being brought into play in the automatic control that realizes pipeline.
With employed solenoid valve in the refrigeration system is example, and Chinese patent literature CN1904427A, CN2814064Y and CN2636011Y disclose a kind of two-position three way bistable electromagnetic valve respectively.This solenoid valve comprises the shell that a non-magnet material is made, electromagnetic coil is housed in the enclosure, spool is contained in the electromagnetic coil, stretch out valve pipe from the electromagnetic coil two ends, second outer pipe that described valve pipe body is included in first inlet tube that electromagnetic coil one end stretches out and first outer pipe and stretches out from the other end of electromagnetic coil for the refrigeration agent circulation.When solenoid valve is worked, after the electromagnetic coil energising, the electromagnetic force that impulsive current produces produces suction to spool, spool changes in the position of electromagnetic coil, be communicated with first inlet tube and first outer pipe, close second outer pipe, refrigeration agent flows to first outer pipe from first inlet tube, and this moment, solenoid valve was in closed condition; After the electromagnetic coil outage, motion in the opposite direction in electromagnetic coil under the effect of the permanent magnet that spool is installed in electromagnetic coil, be communicated with first inlet tube and second outer pipe, close first outer pipe, refrigeration agent flows to second outer pipe from first inlet tube, and this moment, solenoid valve was in open mode.Because this solenoid valve is with the on off state of impulsive current control valve, do not need to keep electric current and just can stablize the maintenance solenoid valve in arbitrary working state, compare with traditional solenoid valve, improved the life-span and the reliability of solenoid valve with electric current hold mode control switch.
Though this solenoid valve is compared the life-span of having improved solenoid valve with traditional solenoid valve, the shortcoming of himself is arranged also.In this solenoid valve, the magnetic line of force that electromagnetic coil produces is that medium conducts with the air in the electromagnetic coil outside, that is to say, the magnetic line of force flows to the other end of electromagnetic coil from an end of electromagnetic coil through the outside air of electromagnetic coil, converges in the inner conduction through magnetic core of electromagnetic coil then to form the magnetic line of force of closing to spool generation effect again.Because the magnetic resistance of air is far longer than magnet case, so the circulation of the magnetic line of force is subjected to very big inhibition, reduced the suction of electromagnetic coil to spool.
In order to satisfy the performance requirement of solenoid valve, make coil provide enough electromagnetic attractions for spool, need significantly increase the power of solenoid valve.Yet coil power can cause the electromagnetic coil temperature rise too high after increasing; And the leakage field problem of this electromagnetic coil is serious, makes to significantly reduce through the magnetic flux of electromagnetic coil external reflux to electromagnetic coil inside, and the Environmental Conditions that this also can further worsen electromagnetic coil causes coil temperature further to raise.If coil temperature is too high, not only can reduce the reliability of electromagnetic coil greatly, also can shorten the working life of coil greatly.
Therefore, need a kind of solenoid valve that helps magnetic line of force conduction.
Summary of the invention
The technical problem that the present invention solves is, a kind of solenoid valve that helps magnetic line of force conduction is provided.
In order to solve above technical problem, the invention provides a kind of solenoid valve, comprise electromagnetic coil, be installed in the spool in the electromagnetic coil, described spool moves under the effect of electromagnetic coil and makes solenoid valve conduction or close, described electromagnetic coil has a conducting magnetic component of being made by permeability magnetic material outward, described conducting magnetic component comprises two overhead structures that are arranged on the electromagnetic coil two ends and bottom member, is connected the side member of described overhead structure and bottom member, and described solenoid valve also comprises the shell of being made by nonmagnetic substance.
Preferably, described overhead structure comprises the roof that is fitted in electromagnetic coil one end, and described bottom member comprises the diapire that is fitted in the electromagnetic coil the other end.
Preferably, described side member comprises that the sidewall or the described side member that connect roof and diapire comprise many parallel ribs that are connected roof and diapire.
Preferably, described overhead structure comprises a top-support that converges the electromagnetic coil magnetic line of force, reaches the many ribs that the end face from described top-support along electromagnetic coil extends to its outer end, and the rib of described overhead structure is connected with side member.
Preferably, described bottom member comprises a bottom bracket that converges the magnetic line of force of electromagnetic coil, and many ribs extending to its outer end of end face from described bottom bracket along electromagnetic coil, the rib of described bottom member is corresponding one by one with the rib of overhead structure and be connected with side member.
Preferably, described side member comprises many ribs, and the rib of described side member connects the rib of overhead structure and the rib of bottom member.
Preferably, it is interior or in the enclosure built-in that described conducting magnetic component is embedded in shell.
Preferably, described shell is that heat-resisting plastics are made.
The present invention also provides a kind of method for preparing solenoid valve, comprising:
A), make the conducting magnetic component that comprises roof, diapire, connects the sidewall of this diapire and diapire with permeability magnetic material plate bending forming;
B) described conducting magnetic component is embedded in the shell that nonmagnetic substance makes;
C) form solenoid valve in the conducting magnetic component with being installed in after electromagnetic coil and the spool assembling.
The present invention also provides a kind of method for preparing solenoid valve, comprising:
A), make the conducting magnetic component that comprises roof, diapire, connects the sidewall of this roof and diapire with permeability magnetic material plate bending forming;
B) form the shell that is wrapped in the nonmagnetic substance outside this conducting magnetic component surface at described conducting magnetic component surface plastic spraying or molding and forming;
C) form solenoid valve with being installed in the shell of making in the step b) after solenoid valve and the spool assembling.
The invention provides a kind of solenoid valve.The present invention is on the basis of original solenoid valve, do not increase the volume of solenoid valve, conducting magnetic component for magnetic line of force conduction is provided between electromagnetic coil and shell, the magnetic line of force that electromagnetic coil is produced conducts through described magnetic conduction construction outside electromagnetic coil, and the conduction through spool converges in electromagnetic coil inside then.Because the magnetic resistance of magnet case is far smaller than the magnetic resistance of air, so the magnetic line of force that electromagnetic coil produces can be back to electromagnetic coil inside efficiently, improved the attraction force to spool of electromagnetic coil, promptly improved the performance of solenoid valve.
Compare with existing solenoid valve, solenoid valve provided by the invention can reduce the power of solenoid valve, reduces heat release, delays the aging of insulating material, the working life of effectively improving solenoid valve.In addition, it is interior or in the enclosure built-in that conducting magnetic component is embedded in shell, can also further improve the mechanical strength of shell.
Description of drawings
Fig. 1 is the schematic representation of solenoid valve provided by the invention;
Fig. 2 is a conducting magnetic component provided by the invention schematic representation in the enclosure;
Fig. 3 is the schematic representation of first kind of embodiment of conducting magnetic component provided by the invention;
Fig. 4 is the schematic representation of second kind of embodiment of conducting magnetic component provided by the invention;
Fig. 5 is the schematic representation of the third embodiment of conducting magnetic component provided by the invention.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just to further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
See also Fig. 1, Fig. 2 and Fig. 3, be the electromagnetic valve structure schematic representation of first kind of embodiment of the present invention.Fig. 1 is the stereogram of solenoid valve provided by the invention, and solenoid valve 1 comprises electromagnetic coil 12, and spool and permanent magnet (not shown) are housed in the electromagnetic coil.In electromagnetic coil 12, stretch out many valve pipes (121,122,123) to its two ends, described valve pipe body comprises first inlet tube 121 and first outer pipe 122 that stretches out from an end 12a of electromagnetic coil, stretches out second outer pipe 123 at the other end 12b of electromagnetic coil.During solenoid valve work, after the electromagnetic coil energising, spool is communicated with first inlet tube 121 and first outer pipe 122 under the effect of impulsive current, close second outer pipe 123, and refrigeration agent flows to first outer pipe from first inlet tube, and this moment, solenoid valve was in closed condition; After the solenoid valve outage, motion in the opposite direction is communicated with first inlet tube 121 and second outer pipe 123 under the effect of spool permanent magnet in solenoid valve, closes first outer pipe 121, refrigeration agent flows to second outer pipe 123 from first inlet tube 121, and this moment, solenoid valve was in open mode.
Outside at electromagnetic coil 12, the invention provides the conducting magnetic component 13 that a st12 steel plate is made, in the shell 11 that conducting magnetic component 13 is embedded in or interior plant non-magnet material is made, electromagnetic coil is shown for convenience, in the structure of Fig. 1, the lid of the shell 11 that do not draw and conducting magnetic component 13.
Please conducting magnetic component be shown for convenience simultaneously referring to Fig. 2, the electromagnetic coil 12 that do not draw in Fig. 2, Fig. 2 are the position view of conducting magnetic component 13 in shell 11, and shell 11 also comprises two fixed plate 11a that have aperture that are used for fixing solenoid valve.
See also Fig. 3, be the schematic representation of conducting magnetic component 13 provided by the invention.Described conducting magnetic component comprises roof 131 and the diapire 132 (electromagnetic coil does not draw among the figure) that is fitted in the electromagnetic coil two ends, have a groove 131a that first inlet tube 121 and first outer pipe 122 are passed on the described roof 131, have a groove 132a that second outer pipe is passed on the described diapire 132.Conducting magnetic component also comprises the first side wall 133 that connects described roof 131 and diapire 132, second sidewall 134 relative with the first side wall 133, on the position shown in Fig. 3, the first side wall 133 and second sidewall are fitted in respectively on the sidewall of shell 11 or are built-in in the sidewall of shell 11.Roof 131, the first side wall 133, diapire 132, second sidewall 134 fuse and are quadrilateral, and described conducting magnetic component becomes the hull shape similar to shell shape.
In first kind of embodiment, the magnetic line of force that electromagnetic coil produces is compiled by roof earlier, flow to diapire through several sidewalls then, close in electromagnetic coil inside at last, the magnetic line of force that forms sealing produces suction to spool, because the magnetic resistance of conducting magnetic component is far smaller than the magnetic resistance of air, therefore make the magnetic line of force more effectively conduct, when electromagnetic coil being reached same big magnetic force, need littler electromagnetic power, can reduce heat radiation, reduce the operating temperature of electromagnetic coil, it is aging to delay insulating material, improves the life-span of solenoid valve.
In addition, conducting magnetic component also plays good supporting effect to shell, improves the intensity of shell effectively, overcomes bigger external impacts, effectively inner coil and the valve body of protection.
In first kind of embodiment, conducting magnetic component can also comprise and is fitted in the 3rd sidewall on the outer housing cover or is fitted in the 4th sidewall on the outer shell bottom wall, makes conducting magnetic component become an almost housing of sealing.
Preparation method for conducting magnetic component, the present invention is also without particular limitation, the st12 or the st14 steel plate that for example can be 0.2mm～0.8mm with thickness adopt the blanking die blanking, adopt shaping die flanging, brake forming to make the shape of conducting magnetic component shown in Figure 3 then.
For the preparation method of solenoid valve, can will be placed in the shell after conducting magnetic component and the electromagnetic coil assembling.Perhaps, the conducting magnetic component after the moulding is put into outer casing mold, through molding and forming, built-in portion in the enclosure, pack in the enclosure then electromagnetic coil and spool form solenoid valve.Perhaps, the conducting magnetic component surface after moulding is carried out plastic-blasting processing formation and is wrapped in the shell that the nonmagnetic substance outside this conducting magnetic component surface is made, and pack in the enclosure then electromagnetic coil and spool form solenoid valve.Because conducting magnetic component can be embedded in the shell or built-in portion in the enclosure, not only can strengthen the intensity of shell, also effectively utilized the solenoid valve space, can not make existing solenoid valve after conducting magnetic component has been installed, increase volume in addition.
Can the structure of above-mentioned conducting magnetic component be further improved.
Referring to Fig. 4, be the schematic representation of second kind of embodiment of conducting magnetic component 13 provided by the invention.In this embodiment, conducting magnetic component has the roof 131 and with roof relative diapire 132 identical with conducting magnetic component shape in first kind of embodiment.In order to improve the heat dispersion of solenoid valve, in second kind of embodiment, provide with first kind of mode of execution in the different side member of a plurality of sidewall shape, as shown in Figure 4, side member comprises the tabular rib 133a of many connection roofs 131 that are parallel to each other and diapire 132, and rib is fitted on the sidewall of shell.For the quantity of rib, the present invention and without particular limitation, the shape of rib can be Any shape such as bar-shaped, strip.
For the sidepiece conducting magnetic component, it is the key factor of decision conducting magnetic component magnetic force line conduction ability in the size perpendicular to the cross-section area of electromagnetic coil direction, that is to say that the cross-section area of side member is big more, and the magnetic force line conduction ability is strong more.Compare with first kind of embodiment, because side member is made up of many parallel ribs, the space between the rib helps the heat radiation of electromagnetic coil more, therefore can slow down wearing out of insulating material.In addition, the form of rib also helps increasing the intensity of shell more than the form of sidewall.After making sidewall the form of rib into, for the cross-section area that prevents side member reduces, can thicken the thickness of rib, this also can further increase the intensity of shell.
For the assembling of conducting magnetic component and shell, conducting magnetic component can be placed in the outer casing mold molding and forming.
In addition, also first kind of concrete mode and second kind of embodiment can be combined the formation conducting magnetic component, for example in first kind of embodiment, can be respectively the first side wall or second sidewall be made the form of rib.For the side member on outer housing cover or the diapire, also can make the form of rib, these can both realize purpose of the present invention.
Conducting magnetic component provided by the invention can also have other form.
Referring to Fig. 5, be the schematic representation of the third embodiment of conducting magnetic component provided by the invention.As shown in Figure 5, conducting magnetic component comprises the overhead structure and the bottom member at electromagnetic coil two ends, described overhead structure comprises the top-support 131a that has groove, groove is used to make first inlet tube and second inlet tube to pass, upward be extended with a plurality of column rib 131b to its outer end from described top-support 131a along the end face of electromagnetic coil, described bottom member has the structure identical with overhead structure, also comprise a bottom bracket 132a who has a groove and with the corresponding many column rib 132b in overhead structure position, side member then is made of the many column rib 133a that connect overhead structures and bottom member.Rib also can be strip, other shape such as tabular.
In the third embodiment, overhead structure, bottom member and side member include the shape of column rib.After the electromagnetic coil energising, the magnetic line of force of its generation compiles through overhead structure, flow through successively column rib, the bottom member of column rib, the side member of overhead structure column rib, bottom member compile parts, flow back to electromagnetic coil inside at last and close, spool is produced sucking action.Because the magnetic resistance of the material of conducting magnetic component is far smaller than the magnetic resistance of air, so the magnetic line of force all can improve the circulation effect of the magnetic line of force along the conducting magnetic component circulation of magnetic resistance minimum, reduced the power of solenoid valve, reduces temperature rise.
With conducting magnetic component and shell assembling the time, conducting magnetic component is placed in the outer casing mold molding and forming earlier.Compare with first kind of concrete mode, the built-in portion in the enclosure of conducting magnetic component of rib strip shaped is arranged, shell is played better supporting effect, help improving the mechanical strength of shell.In order to guarantee the cross-section area of conducting magnetic component, can thicken rib, make long-pending the remaining unchanged of entire cross section of conducting magnetic component.
The third embodiment and second kind of embodiment can be combined, be about to the form that overhead structure and bottom member are made rib, and the form that side member is made sidewall also can be reached purpose of the present invention.
The present invention is enclosed in the electromagnetic coil outside with conducting magnetic component and is contained in later in the shell that non-magnet material makes.For the material of permeability magnetic material, as long as can reach the purpose of magnetic conduction, can be the alloy of various metals such as various iron, copper, aluminium, preferred, be ferro-alloy, as the steel plates such as st12, st14 of Anshan iron and steel plant production.For the material of sheathing material, preferred as long as be can be polyethylene, polypropylene, polybutylene by non-magnet material, sheathing material is selected heat-resisting polypropylene.
Solenoid valve of the present invention can be used solenoid valve in hydraulic pressure, vacuum, combustion gas transmission and the refrigeration system.Preferably, solenoid valve of the present invention refers to be used for to control the solenoid valve of cold medium flux of the temperature in chiller plant different temperatures district, as is used in the cold storage room of refrigerator and the 2/2-way solenoid valve or the two-bit triplet solenoid valve of refrigerating chamber.
More than solenoid valve provided by the present invention is described in detail.Used specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. solenoid valve, comprise electromagnetic coil, be installed in the spool in the electromagnetic coil, described spool moves under the effect of electromagnetic coil and makes solenoid valve conduction or close, it is characterized in that described electromagnetic coil has a conducting magnetic component of being made by permeability magnetic material outward, described conducting magnetic component comprises the overhead structure that is arranged on the electromagnetic coil two ends and bottom member, is connected the side member of described overhead structure and bottom member, and described solenoid valve also comprises the shell of being made by nonmagnetic substance.
2. solenoid valve according to claim 1 is characterized in that described overhead structure comprises the roof that is fitted in electromagnetic coil one end, and described bottom member comprises the diapire that is fitted in the electromagnetic coil the other end.
3. solenoid valve according to claim 2 is characterized in that described side member comprises that the sidewall or the described side member that connect roof and diapire comprise many parallel ribs that are connected roof and diapire.
4. solenoid valve according to claim 1, it is characterized in that described overhead structure comprises a top-support that converges the magnetic line of force of electromagnetic coil, reach the many ribs that the end face from described top-support along electromagnetic coil extends to its outer end, the rib of described overhead structure is connected with side member.
5. solenoid valve according to claim 4, it is characterized in that described bottom member comprises a bottom bracket that converges the magnetic line of force of electromagnetic coil, and many ribs extending to its outer end of end face from described bottom bracket along electromagnetic coil, the rib of described bottom member is corresponding one by one with the rib of overhead structure and be connected with side member.
6. solenoid valve according to claim 5 is characterized in that described side member comprises many ribs, and the rib of described side member connects the rib of described overhead structure and the rib of bottom member.
7. according to each described solenoid valve of claim 1 to 6, it is characterized in that described conducting magnetic component is embedded in the shell or in the enclosure built-in.
8. solenoid valve according to claim 7 is characterized in that described shell is that heat-resisting plastics are made.
9. method for preparing solenoid valve comprises:
A), make the conducting magnetic component that comprises roof, diapire, connects the sidewall of this roof and diapire with permeability magnetic material plate bending forming;
B) described conducting magnetic component is embedded in the shell that nonmagnetic substance makes;
C) form solenoid valve in the conducting magnetic component with being installed in after electromagnetic coil and the spool assembling.
10. method for preparing solenoid valve comprises:
A), make the conducting magnetic component that comprises roof, diapire, connects the sidewall of this roof and diapire with permeability magnetic material plate bending forming:
B) form the shell that is wrapped in the nonmagnetic substance outside this conducting magnetic component surface at described conducting magnetic component surface plastic spraying or molding and forming;
C) form solenoid valve with being installed in the shell of making in the step b) after electromagnetic coil and the spool assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810177599A CN101737546A (en) | 2008-11-25 | 2008-11-25 | Electromagnetic valve and preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810177599A CN101737546A (en) | 2008-11-25 | 2008-11-25 | Electromagnetic valve and preparing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101737546A true CN101737546A (en) | 2010-06-16 |
Family
ID=42461420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810177599A Pending CN101737546A (en) | 2008-11-25 | 2008-11-25 | Electromagnetic valve and preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101737546A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100756A (en) * | 2013-04-03 | 2014-10-15 | 波凯特有限公司 | Solenoid valve, battery of solenoid valves, method of manufacturing a solenoid valve, and mold |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201126040Y (en) * | 2007-06-21 | 2008-10-01 | 宜兴市四通家电配套厂 | Low noise bistable two position three way electromagnetic valve |
-
2008
- 2008-11-25 CN CN200810177599A patent/CN101737546A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201126040Y (en) * | 2007-06-21 | 2008-10-01 | 宜兴市四通家电配套厂 | Low noise bistable two position three way electromagnetic valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100756A (en) * | 2013-04-03 | 2014-10-15 | 波凯特有限公司 | Solenoid valve, battery of solenoid valves, method of manufacturing a solenoid valve, and mold |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8193887B2 (en) | Monostable permanent magnetic actuator using laminated steel core | |
| TWI268322B (en) | Electromagnetic valve | |
| JP5041052B2 (en) | Cooling structure of reactor with magnet | |
| EP2420762A3 (en) | Cooling system of an electromagnet assembly | |
| CN102338231A (en) | Two-position three-way electromagnetic valve | |
| ATE331169T1 (en) | BISTABLE ELECTROMAGNETIC VALVE | |
| CN106329808A (en) | Heat pipe type winding enhanced heat motor | |
| CN103052998A (en) | Solenoid valve with a two-part core | |
| CN101737546A (en) | Electromagnetic valve and preparing method | |
| CN101741218B (en) | Electromagnetic pump for driving conductive fluid and manufacturing method thereof | |
| JP5948841B2 (en) | Refrigerant circuit unit | |
| CN102438420A (en) | Clamping mechanism | |
| CN201000805Y (en) | Highly-effective large capacity open ventilation dry type transformer | |
| CN202417882U (en) | Variable discharge capacity compressor and air conditioner therewith | |
| CN216590197U (en) | Electromagnetic structure of electromagnetic valve for pilot control | |
| CN209962961U (en) | DC contactor with detachable starting electromagnetic coil | |
| CN217874185U (en) | Automatic valve device that puts of refrigerant | |
| CN101651005B (en) | Electromagnet and switch valve using same | |
| CN201441946U (en) | Large-scale circulating water cooling electric magnetic iron remover | |
| CN204358216U (en) | The gas electromagnetic valve that a kind of hand is opened, power-off is closed | |
| WO2020090263A1 (en) | Relay | |
| KR100739828B1 (en) | a solenoid valve | |
| CN210073530U (en) | Novel electromagnetic coil structure | |
| CN210142632U (en) | Closing electromagnetic structure of circuit breaker | |
| TWI841223B (en) | Relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100616 |