CN202796731U - Wind pressure switch - Google Patents
Wind pressure switch Download PDFInfo
- Publication number
- CN202796731U CN202796731U CN201220464035.7U CN201220464035U CN202796731U CN 202796731 U CN202796731 U CN 202796731U CN 201220464035 U CN201220464035 U CN 201220464035U CN 202796731 U CN202796731 U CN 202796731U
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- loam cake
- housing
- blast switch
- push pedal
- hole
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Abstract
The utility model discloses a wind pressure switch. The wind pressure switch comprises a shell body, an upper cover, a microswitch arranged on the upper cover and a membrane device, wherein the shell body and the upper cover form a sealing cavity, the upper cover is provided with a first through hole communicated with an inner cavity of the upper cover, a trigger end of the microswitch is correspondingly arranged with the first through hole, the membrane device is arranged between the shell body and the upper cover and divides the sealed cavity, the membrane device comprises a push plate and a frame membrane connected with the outer edge of the push plate, the outer edge of the frame membrane is clamped between the shell body and the upper cover, and the push plate is provided with a contact column which extends towards the upper cover and corresponds to the trigger end of the microswitch. The membrane device of the wind pressure switch comprises the push plate and the frame membrane connected with the outer edge of the push plate; a part close to the middle of the frame membrane is connected with the push plate; the push plate has certain hardness, is stable in structure, and not prone to be adhered to the upper cover and the shell body; accordingly the membrane device is not prone to be adhered to the upper cover and the shell body, failure of the wind pressure switch is effectively avoided, and performance stability of the wind pressure switch is improved.
Description
Technical field
The utility model relates to the switching technique field, particularly a kind of blast switch.
Background technology
Blast switch is a kind of detecting element, and being mainly used in needs to detect blast mechanically, and such as the electric equipment products of the use combustion gas classes such as pneumatic press, airoperated clipper, gas heater, it is to utilize the pressure promotion sensitive switch of gas to realize.
Blast switch is by housing, loam cake, the parts such as diaphragm and sensitive switch form, diaphragm is by loam cake and housing clamping, and the cavity of housing and loam cake composition is separated into plemum and negative pressure chamber, be provided with breather line on loam cake and the housing, plemum and negative pressure chamber are respectively by two breather lines and atmospheric pressure environment or operating air pressure environmental communication, on cover and be provided with through hole, the through hole is provided with tactile film, and should touch film by loam cake and be used for the fixedly support clamping of sensitive switch, tactile center membrane has the contact, end face of contact and the trigger end of sensitive switch are over against, the corresponding setting with diaphragm of another end face; Be provided with connecting pipe on the housing, connecting pipe is provided with internal thread away from an end of diaphragm, and is equipped with the adjustment screw, is set with spring in the connecting pipe, and an end of spring is provided with the liner that offsets with diaphragm, on the adjustment screw that the other end is against.Its operation principle is: the plemum of blast switch is connected the breather line of being connected with housing by loam cake and is connected with extraneous with negative pressure chamber, utilize separately malleation or negative pressure to control diaphragm deformation according to plemum or negative pressure chamber, also can control simultaneously in plemum and negative pressure chamber the deformed movement of diaphragm, diaphragm contacts with tactile film, and pass through the tactile film of extruding so that the contact of tactile film contacts with the trigger end of sensitive switch, thereby realize the open and close of sensitive switch.
Because blast switch is mainly used in containing a large amount of water vapours in the environment of the high temperature such as family expenses forced air ventilation gas heater burning, when cooling, the loam cake place easily produces water recovery, after making the steam that partly condenses enter the air chamber of blast switch, will condensation, be bonded at diaphragm, between loam cake and the housing, because the quality of diaphragm is soft, the phenomenon of diaphragm and loam cake or housing bonding very easily occurs, sometimes even can make between diaphragm and loam cake or the housing and form vacuum state, produce infinitely-great bonding force, so that diaphragm can't be adjusted the position according to the pressure of plemum and negative pressure chamber, can not finish the effect that drives the sensitive switch action by diaphragm deformation, make blast switch lose efficacy unstable properties.
Therefore, how to avoid diaphragm and loam cake or housing adhesion, become those skilled in the art's problem demanding prompt solution.
The utility model content
In view of this, the utility model provides a kind of blast switch, to avoid diaphragm and loam cake or housing adhesion.
For achieving the above object, the utility model provides following technical scheme:
A kind of blast switch comprises:
Housing;
Form the loam cake of closed cavity with described housing, cover on described and be provided with the first through hole that is communicated with its inner chamber;
Be arranged at the sensitive switch that covers on described, its trigger end and the corresponding setting of described the first through hole;
Be located between described housing and the described loam cake and cut apart the diaphragm device of described closed cavity;
Described diaphragm device comprises push pedal and the frame diaphragm that is connected with the outward flange of described push pedal; The outward flange of described frame diaphragm is located between described housing and the described loam cake; Be provided with in the described push pedal to described loam cake and extend and the contact post corresponding with the trigger end of described sensitive switch.
Preferably, described frame diaphragm is ring film, and described push pedal is the circular push pedal that is connected with the inner ring of described ring film.
Preferably, the inner ring of described ring film circumferentially is provided with the first annular boss, is provided with the first ring connected in star that matches with described the first annular boss on the outward flange of described circular push pedal;
The outer ring of described ring film circumferentially is provided with the second annular boss, covers on described and is provided with the second annular groove that matches with described the second annular boss.
Preferably, be provided with the convex annular looping on the groove bottom of described the second annular groove, be provided with on the described housing with described convex annular looping and cooperate the seal convexity circle that pushes described the second annular boss.
The contact of the tactile film that preferably, covers on described the first through hole and the corresponding setting of described contact post and described trigger end.
Preferably, the fine motion mount pad of described blast switch has for the mounting panel that is connected with described loam cake with for the fixed head of fixing described sensitive switch; Be provided with the convex annular looping that multiple tracks is used for compressing described tactile film on the described mounting panel.
Being provided with for the riveting post of fixing described sensitive switch and described riveting post and described fixed head on the described fixed head is the integral type structure.
Preferably, be provided with the second through hole of corresponding setting with described contact post on the described housing, be provided with the adjustment screw that covers described the second through hole on the housing face of described housing away from described loam cake, be provided with spring in described the second through hole, the two ends of described spring offset with described adjustment screw and described push pedal respectively.
Preferably, described loam cake comprises loam cake body and the support that is spirally connected with described loam cake body;
Be provided with a plurality of installation sites be used to described support is installed on the described loam cake body; Has angle between at least two installation sites.
Preferably, the outside of described housing evenly is provided with a plurality of snap fits, covers on described and is provided with the draw-in groove that is connected with described snap fit.
Preferably, the breather line of the breather line of described loam cake and described housing all is arranged with protective sleeve outward.
Preferably, described housing is plastic casing, and described loam cake is upper plastic cover.
Can find out from above-mentioned technical scheme, the blast switch that the utility model provides, diaphragm device comprises push pedal and the frame diaphragm that is connected with the outward flange of push pedal, cut apart by diaphragm device and to form two cavitys behind the closed cavity, and different by the pressure in two cavitys, realize the distortion of diaphragm device; Because in the deformation process of diaphragm device, distortion by the frame diaphragm is moved push pedal, because the frame diaphragm is located between loam cake and the housing, make it larger near middle partial dislocation, and the frame diaphragm is connected with push pedal near middle part, push pedal has certain degree of hardness, structure is more stable, is difficult for and loam cake and housing adhesion, thereby diaphragm device is difficult for and loam cake and housing adhesion, effectively avoid the situation that blast switch lost efficacy to occur, improved its stability.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the blast switch that Fig. 1 provides for the utility model embodiment;
The exploded perspective view of the blast switch that Fig. 2 provides for the utility model embodiment;
The first structural representation of the fine motion mount pad that Fig. 3 provides for the utility model embodiment;
The second structural representation of the fine motion mount pad that Fig. 4 provides for the utility model embodiment.
Embodiment
The utility model discloses a kind of blast switch, to avoid diaphragm and loam cake or housing adhesion.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1 and Fig. 2, the structural representation of the blast switch that Fig. 1 provides for the utility model embodiment; The exploded perspective view of the blast switch that Fig. 2 provides for the utility model embodiment.
The utility model embodiment provides a kind of blast switch, comprising: housing 1; Form the loam cake 2 of closed cavity with housing 1, on cover and be provided with the first through hole that is communicated with its inner chamber; Be arranged at the sensitive switch 5 on the loam cake 2, the corresponding setting with the first through hole of its trigger end; Be located between housing 1 and the loam cake 2 and cut apart the diaphragm device of closed cavity; Diaphragm device comprises push pedal 4 and the frame diaphragm 3 that is connected with the outward flange of push pedal 4; The outward flange of frame diaphragm 3 is located between housing 1 and the loam cake 2; Be provided with in the push pedal 4 to loam cake 2 and extend and the contact post corresponding with the trigger end of sensitive switch 5.
The blast switch that the utility model provides, diaphragm device comprises push pedal 4 and the frame diaphragm 3 that is connected with the outward flange of push pedal 4, cut apart by diaphragm device and to form two cavitys behind the closed cavity, and different by the pressure in two cavitys, realize the distortion of diaphragm device; Because in the deformation process of diaphragm device, distortion by the frame diaphragm is moved push pedal, because the frame diaphragm is located between loam cake and the housing, make it larger near middle partial dislocation, and the frame diaphragm is connected with push pedal near middle part, push pedal has certain degree of hardness, structure is more stable, is difficult for and loam cake and housing adhesion, thereby diaphragm device is difficult for and loam cake and housing adhesion, effectively avoid the situation that blast switch lost efficacy to occur, improved its stability.
Need to prove, cut apart two cavitys that form behind the closed cavity by diaphragm device and be respectively plemum and negative pressure chamber, plemum and negative pressure chamber respectively be arranged at housing 1 on breather line and the breather line that is arranged on the loam cake 2 be communicated with, plemum and negative pressure chamber are respectively by two breather lines and atmospheric pressure environment or operating air pressure environmental communication, pressure in two cavitys is different, realizes the distortion of diaphragm device.
In order to make the stressed even of diaphragm device, preferred frame diaphragm 3 is ring film, and push pedal 4 is the circular push pedal that is connected with the inner ring of ring film.Frame diaphragm 3 and push pedal 4 also can be set to other shapes according to the concrete structure of loam cake 2 and housing 1, such as Back Word frame diaphragm and square push pedal etc.
In the present embodiment, the inner ring of ring film circumferentially is provided with the first annular boss, is provided with the first ring connected in star that matches with the first annular boss on the outward flange of circular push pedal; The outer ring of ring film circumferentially is provided with the second annular boss, is provided with the second annular groove that matches with the second annular boss on the loam cake 2.By being connected of the first annular boss and first ring connected in star, Effective Raise the sealing of ring film and circular push pedal junction; By being connected of the second annular boss and the second annular groove, Effective Raise ring film cut apart mutual independence between two cavitys that form behind the closed cavity, the situations of having avoided two cavitys to be communicated with at the ring film place, Effective Raise the use accuracy of the blast switch that provides of the utility model embodiment.
For further raising, the sealing effectiveness of ring film between housing 1 and loam cake 2, preferably the groove bottom at the second annular groove is provided with the convex annular looping, is provided with on the housing 1 to cooperate the seal convexity circle that pushes the second annular boss with the convex annular looping.The second annular boss of ring film is fitted into the second annular groove, by the assembling of housing 1 with loam cake 2, make on the housing 1 the convex annular looping that arranges on the groove bottom of the seal convexity circle that arranges and the second annular groove mutually close, thereby reach the effect that the second annular boss is pushed in seal convexity circle and convex annular looping, and then improve the sealing effectiveness of ring film between housing 1 and loam cake 2.Also can be only the convex annular looping be set or only at housing 1 the seal convexity circle corresponding with the second annular groove be set in the groove bottom of the second annular groove, can reach equally the effect of the sealing effectiveness of raising ring film between housing 1 and loam cake 2.
The contact of the tactile film 6 that preferably, covers on the first through hole and the corresponding setting of contact post and trigger end.At the pressure of two cavitys not simultaneously, the diaphragm device distortion, when it is out of shape to sensitive switch 5, the contact post of its push pedal 4 is to sensitive switch 5 motions, by pushing the contact of touching film 6, make and touch the film distortion, and the contact of touching film 6 is contacted with the trigger end of sensitive switch 5, finish the unlatching of sensitive switch 5 or close.
Further, sensitive switch 5 is fixed on the loam cake 2 by fine motion mount pad 51.As shown in Figure 3 and Figure 4, fine motion mount pad 51 has for the mounting panel 511 that is connected with loam cake 2 and is used for the fixedly fixed head 512 of sensitive switch 5, touch the first through hole that arranges on the film 6 sealing loam cakes 2 in order to make, be provided with the groove that touches film 6 be used to holding on the loam cake 2, the first through hole is arranged on the groove bottom of groove, to touch film places in the groove and covers the first through hole, and mounting panel 511 is covered on the groove, in the space that the groove that makes tactile film 6 be located in mounting panel 511 and loam cake 2 forms, be provided with 4 riveting posts on the loam cake 2, be provided with the riveting post hole of matching with the riveting post that arranges on the loam cake 2 on the mounting panel 511, be connected with the rivet hot of riveting post by riveting post hole mounting panel 511 is connected with loam cake 2, and in the rivet hot connection procedure, push mounting panel 511 to loam cake 2 directions, reach the effect of touching film 6 that compresses, realize touching the first through hole that arranges on the film 6 sealing loam cakes 2.Also can be bolted mounting panel 511 to be connected with loam cake 2 and to compress and touch film 6, realize touching the first through hole that arranges on the film 6 sealing loam cakes 2.
As shown in Figure 3, compress effect in order to improve sealing, be provided with multiple tracks on the mounting panel 511 and be used for compressing the convex annular looping of touching film 6, mounting panel 511 is cooperated installation with loam cake 2 after, the convex annular looping that arranges on the mounting panel 511 compresses touches film 6, thereby tactile film 6 is pushed to the first through hole direction, thereby improved the effect of tactile film 6 sealings the first through hole.Preferably, the convex annular looping is 2, and the convex annular looping of other quantity also can be set, and introduces no longer one by one at this.
Evenly be provided with four reference columns around the first through hole of loam cake 2, be provided with the location hole that matches with reference column on the mounting panel 511.
Be provided with on the fixed head 512 for the fixing riveting post of sensitive switch 5, in order to simplify installation step, preferably riveting post and fixed head 512 be set to integral structure.
As shown in Figure 4, can also be provided for the fixedly buckle of sensitive switch 5 at fixed head 512, and preferably buckle and fixed head 512 are set to integral structure, can reach above-mentioned effect equally.
Need to prove that sensitive switch 5 can be fixed on the loam cake 2 by modes such as stickup or bindings, the concrete mounting means of sensitive switch 5 does not limit yet.
In order to improve the stability of diaphragm device in closed cavity, be provided with the second through hole of corresponding setting with the contact post on the housing 1, be provided with the adjustment screw 7 that covers the second through hole on the housing face of housing 1 away from loam cake 2, be provided with spring 8 in the second through hole, the two ends of spring 8 offset with adjustment screw 7 and push pedal 4 respectively.Adjust screw 7 by regulating, the power of regulating spring 8 extruding push pedals 4, and then starting point and the Burnout (being opening pressure and closing presure) of blast switch are regulated in realization.
In order to improve the sealing property of the second through hole, be provided with protective cover 9 at the second through hole away from a side of push pedal 4, and at the inwall and the gap-fill fluid sealant of adjusting screw 7 of the second through hole.
Present blast switch, be mounted on the installation site by the support that arranges thereon, and support and loam cake body adopt integral structure mostly, the angle that is the breather line of the installation site of blast switch and loam cake is certain, this mounting means very easily causes fixing but breather line is connected limited problem with extraneous pipeline with the installation site, can not be suitable for multiple installation requirements, for installation brings very large inconvenience.The loam cake 2 of the blast switch that the utility model embodiment provides comprises loam cake body 21 and the support 22 that is spirally connected with loam cake body 21; Be provided with a plurality of installation sites for mounting bracket 22 on the loam cake body 21; Has angle between at least two installation sites.By the installation site of support 22 on loam cake body 21 is different, adjust itself and the angle of the breather line of loam cake 2, and then be convenient to installation.
Need to prove, because loam cake body 21 is bolted with support 22, the installation site that namely is arranged on the loam cake body 21 is bolt hole, and an installation site can be a bolt hole, also can be a plurality of bolts hole, the concrete quantity of bolt hole be decided according to actual needs; The bolt hole that arranges at loam cake body 21 can be equally distributed, and by installation site of adjacent several bolts hole compositions, for example evenly be provided with 9 bolts hole on the loam cake body 21, per 3 bolts hole form an installation site that is used for mounting bracket 22, the installation site can be comprised of first, second, and third bolt hole, also can be that second, third and the 4th bolt hole form, namely the installation site of 9 bolt hole compositions is more than 3, and every adjacent 3 form an installation site in 9 bolts hole.
Preferably, snap fit 11 is for being inverted snap fit, and namely it colludes and gets end away from loam cake 2, loam cake 2 be coated on be inverted the snap fit outside and make it and the inwall of loam cake 2 on the draw-in groove 23 that arranges be connected.By snap fit 11 is set to be inverted snap fit, so that loam cake 2 needs button to be located at housing 1 outside and to cover snap fit 11, so that loam cake 2 is larger with the junction overlapping area of housing 1, improved bonding strength.
Impaired because of colliding with for fear of blast switch breather line of the breather line of loam cake 1 and housing 1 in carrying and fetching process, the air-tightness that reduction is connected with extraneous pipeline, the breather line of the breather line of loam cake 1 and housing 1 all is arranged with protective sleeve 10 outward.
Present blast switch, loam cake and housing adopt metal material to be made more, very easily get rusty, and normally use thereby affect blast switch.Preferably, the housing 1 of the blast switch among the utility model embodiment is plastic casing, and loam cake 2 is upper plastic cover.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (11)
1. blast switch comprises:
Housing (1);
Form the loam cake (2) of closed cavity with described housing (1), cover on described and be provided with the first through hole that is communicated with its inner chamber;
Be arranged at the sensitive switch (5) on the described loam cake (2), its trigger end and the corresponding setting of described the first through hole;
Be located between described housing (1) and the described loam cake (2) and cut apart the diaphragm device of described closed cavity;
It is characterized in that described diaphragm device comprises push pedal (4) and the frame diaphragm (3) that is connected with the outward flange of described push pedal (4); The outward flange of described frame diaphragm (3) is located between described housing (1) and the described loam cake (2); Be provided with in the described push pedal (4) to described loam cake (2) and extend and the contact post corresponding with the trigger end of described sensitive switch (5).
2. blast switch as claimed in claim 1 is characterized in that, described frame diaphragm (3) is ring film, and described push pedal (4) is the circular push pedal that is connected with the inner ring of described ring film.
3. blast switch as claimed in claim 2 is characterized in that, the inner ring of described ring film circumferentially is provided with the first annular boss, is provided with the first ring connected in star that matches with described the first annular boss on the outward flange of described circular push pedal;
The outer ring of described ring film circumferentially is provided with the second annular boss, is provided with the second annular groove that matches with described the second annular boss on the described loam cake (2).
4. blast switch as claimed in claim 3 is characterized in that, is provided with the convex annular looping on the groove bottom of described the second annular groove, is provided with on the described housing (1) with described convex annular looping to cooperate the seal convexity circle that pushes described the second annular boss.
5. blast switch as claimed in claim 1 is characterized in that, the contact of the tactile film (6) that covers on described the first through hole and the corresponding setting of described contact post and described trigger end.
6. blast switch as claimed in claim 1 is characterized in that, the fine motion mount pad (51) of described blast switch has for the mounting panel (511) that is connected with described loam cake (2) with for the fixed head (512) of fixing described sensitive switch (5); Be provided with the convex annular looping that multiple tracks is used for compressing described tactile film (6) on the described mounting panel (511).
7. blast switch as claimed in claim 6 is characterized in that, the riveting post and the described riveting post that are provided with on the described fixed head (512) for fixing described sensitive switch (5) are the integral type structure with described fixed head (512).
8. blast switch as claimed in claim 1, it is characterized in that, be provided with the second through hole of corresponding setting with described contact post on the described housing (1), be provided with the adjustment screw (7) that covers described the second through hole on the housing face of described housing (1) away from described loam cake (2), be provided with spring (8) in described the second through hole, the two ends of described spring (8) offset with described adjustment screw (7) and described push pedal (4) respectively.
9. blast switch as claimed in claim 1 is characterized in that, described loam cake (2) comprises loam cake body (21) and the support (22) that is spirally connected with described loam cake body (21);
Be provided with a plurality of installation sites be used to described support (22) are installed on the described loam cake body (21); Has angle between at least two installation sites.
10. blast switch as claimed in claim 1 is characterized in that, the outside of described housing (1) evenly is provided with a plurality of snap fits (11), is provided with the draw-in groove (23) that is connected with described snap fit (11) on the described loam cake (2).
11., it is characterized in that described housing (1) is plastic casing such as each described blast switch of claim 1-10, described loam cake (2) is upper plastic cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220464035.7U CN202796731U (en) | 2012-09-12 | 2012-09-12 | Wind pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220464035.7U CN202796731U (en) | 2012-09-12 | 2012-09-12 | Wind pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202796731U true CN202796731U (en) | 2013-03-13 |
Family
ID=47823937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220464035.7U Expired - Lifetime CN202796731U (en) | 2012-09-12 | 2012-09-12 | Wind pressure switch |
Country Status (1)
| Country | Link |
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| CN (1) | CN202796731U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604207A (en) * | 2013-11-08 | 2014-02-26 | 威能(无锡)供热设备有限公司 | Gas water heating equipment with reverse air resisting capability |
| CN104362038A (en) * | 2014-10-29 | 2015-02-18 | 余姚市嘉荣电子电器有限公司 | Wind pressure switch |
| CN105047473A (en) * | 2015-07-28 | 2015-11-11 | 东莞市康发特塑胶制品有限公司 | Automatic control differential pressure switch |
| CN112735908A (en) * | 2021-01-18 | 2021-04-30 | 段文博 | Wind pressure switch |
| CN114992666A (en) * | 2022-03-31 | 2022-09-02 | 重庆海尔热水器有限公司 | Device for reducing generation of wind pressure switch condensate water, gas heating equipment and control method thereof |
-
2012
- 2012-09-12 CN CN201220464035.7U patent/CN202796731U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604207A (en) * | 2013-11-08 | 2014-02-26 | 威能(无锡)供热设备有限公司 | Gas water heating equipment with reverse air resisting capability |
| CN103604207B (en) * | 2013-11-08 | 2016-08-24 | 威能(无锡)供热设备有限公司 | Possesses the gas and hot water equipment of degeneration-resistant wind energy power |
| CN104362038A (en) * | 2014-10-29 | 2015-02-18 | 余姚市嘉荣电子电器有限公司 | Wind pressure switch |
| CN105047473A (en) * | 2015-07-28 | 2015-11-11 | 东莞市康发特塑胶制品有限公司 | Automatic control differential pressure switch |
| CN105047473B (en) * | 2015-07-28 | 2017-08-11 | 东莞市康发特塑胶制品有限公司 | Automatic control type pressure difference switch |
| CN112735908A (en) * | 2021-01-18 | 2021-04-30 | 段文博 | Wind pressure switch |
| CN114992666A (en) * | 2022-03-31 | 2022-09-02 | 重庆海尔热水器有限公司 | Device for reducing generation of wind pressure switch condensate water, gas heating equipment and control method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20130313 |