CN105047473B - Automatic control type pressure difference switch - Google Patents
Automatic control type pressure difference switch Download PDFInfo
- Publication number
- CN105047473B CN105047473B CN201510448754.8A CN201510448754A CN105047473B CN 105047473 B CN105047473 B CN 105047473B CN 201510448754 A CN201510448754 A CN 201510448754A CN 105047473 B CN105047473 B CN 105047473B
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- Prior art keywords
- lid
- pushing block
- hole
- microswitch
- regulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/245—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by the deformation of a body of elastic material
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
The present invention discloses a kind of automatic control type pressure difference switch, including upper lid, lower cover, microswitch, silica gel lid, pushing block and spring, and end has the first accommodating cavity on lid on this, and the microswitch is installed in the first accommodating cavity；The lower cover has the second accommodating cavity, and upper lid lower end is installed in the second accommodating cavity, and is provided with pressure hole in lower cover sidepiece；The silica gel lid is in case shape, and it is installed on lid lower end, and above pressure hole, is covered in the silica gel provided with a through hole；The pushing block is arranged in through hole, and holding section is respectively equipped with pushing block two ends, and the holding section is blocked on through hole outer, and pushing block top float formula is butted on microswitch；The spring upper end is butted on below pushing block, and lower end is butted on lower lid.Thereby, promote silica gel lid raising and lowering by using negative pressure and spring, realize automatically controlling for microswitch connecting and disconnecting of the circuit, and accurately control pressure differential range, it is to avoid bad phenomenon occurs caused by pressure differential range is excessive or too small, and cost is low, small volume.
Description
Technical field
The present invention relates to break-make electric switch device art, a kind of automatic control type pressure difference switch is referred in particular to.
Background technology
Tradition automatically controls the pressure difference switch used in vacuum crisper and uses conductive pin to be contacted with conducting strip, during work not
Enough stable, pressure differential range is difficult control.Small pressure difference scope is normally on and normally off because pressure difference too small (such as 0.1kpa or so) can be frequently occurred
Bad phenomenon；Big pressure differential range can reduce fresh-keeping effect because of pressure difference too big (such as 10kpa or so).Also some control pressurer systems
Then acted using circuit control automatic switch, can so increase cost and small product size.Therefore, existing pressure difference switch should be carried out
Improve, to solve the above problems.
The content of the invention
In view of this, in view of the existing deficiencies of the prior art, its main purpose is to provide a kind of automatic control type to the present invention
Pressure difference switch, silica gel lid raising and lowering is promoted by using negative pressure and spring, realizes the automatic control of microswitch connecting and disconnecting of the circuit
System, and accurately control pressure differential range, it is to avoid bad phenomenon occurs caused by pressure differential range is excessive or too small, and cost is low, body
Product is small.
To achieve the above object, the present invention is using following technical scheme：
A kind of automatic control type pressure difference switch, it includes lid, lower cover, microswitch, silica gel lid, pushing block and spring,
End has the first accommodating cavity on lid on this, and the microswitch is installed in the first accommodating cavity；The lower cover has the second accommodating cavity, on
Lid lower end is installed in the second accommodating cavity, and in lower cover sidepiece offer one connected with the second accommodating cavity for connect vacuum bear
The pressure hole of pressure；The silica gel lid is in case shape, its can elastic floating formula be installed on lid lower end, and above pressure hole, in
A through hole is provided with the middle part of the silica gel lid；The pushing block is arranged in through hole, and being respectively arranged with one in pushing block upper and lower ends is used to prevent
The holding section that thrust block is departed from by through hole, the holding section is blocked on through hole outer, and elastic floating formula is butted on above-mentioned micro- at the top of pushing block
On dynamic switch；The spring upper end is butted on below pushing block, and lower end is butted on lower lid；Negative pressure of vacuum enters the second accommodating cavity by pressure hole
In, the suction that negative pressure is produced makes silica gel lid toward bottom offset, and silica gel cover strip is moved pushing block and moved down, and pushing block leaves micro- after moving down
Circuit disconnects in dynamic switch, microswitch；When negative pressure of vacuum is reduced, the suction that negative pressure is produced weakens, and pushing block is under the action of the spring
It is in contact toward top offset with microswitch, circuit is connected in microswitch.
It is used as a kind of preferred scheme：A projection is provided with the lower cover bottom interior wall, it is convex that above-mentioned lower spring end is placed on this
On post.
It is used as a kind of preferred scheme：A governor motion for being used to adjust amount of spring compression is provided with the lower lid.
It is used as a kind of preferred scheme：The governor motion includes being arranged at the screwed hole of lower cover bottom, can be combined on screw thread
Regulation in hole covers and is installed on regulation cover outer wall to seal up the sealing ring in gap between regulation lid and screwed hole, above-mentioned bullet
Spring lower end is butted on the regulation and covered.
It is used as a kind of preferred scheme：The regulation covers end and is provided with a projection, and above-mentioned lower spring end is placed on the projection.
It is used as a kind of preferred scheme：Regulation base portion is provided with the adjustment hole for manual rotation.
It is used as a kind of preferred scheme：The governor motion includes the regulation lid and sealing ring being located in the second accommodating cavity and set
The screwed hole and set screw of lower cover bottom are placed in, the sealing ring is installed on regulation cover outer wall, and above-mentioned lower spring end is butted on this
Regulation is covered, and the set screw is installed in screwed hole, and set screw upper end is butted on regulation lid lower section.
It is used as a kind of preferred scheme：The regulation covers end and is provided with a projection, and above-mentioned lower spring end is placed on the projection.
It is used as a kind of preferred scheme：Cavity during the pushing block has one, above-mentioned spring top is butted on cavity top in this.
It is used as a kind of preferred scheme：The alignment pin for fixing microswitch is provided with the upper lid.
The present invention has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technical proposal
Understand, the suction produced by using negative pressure moves down silica gel lid, pops up silica gel lid using the elastic force of spring, silicon
Jiao Gai raising and lowering realizes the Kick type working method of microswitch, so that, realize the automatic of microswitch connecting and disconnecting of the circuit
Control, the microswitch accurately controls pressure differential range, it is to avoid bad phenomenon occurs caused by pressure differential range is excessive or too small,
Also, the microswitch is lower relative to circuit control automatic switch production cost, volume is smaller, empty with wide market
Between.
More clearly to illustrate the architectural feature and effect of the present invention, it is entered with specific embodiment below in conjunction with the accompanying drawings
Row is described in detail.
Brief description of the drawings
Fig. 1 is the pressure difference switch schematic top plan view of the present invention；
Fig. 2 is the pressure difference switch side schematic view of the present invention；
Fig. 3 is the pressure difference switch schematic cross-sectional view for being not provided with governor motion of the present invention；
Fig. 4 is the pressure difference switch decomposing schematic representation for being not provided with governor motion of the present invention；
Fig. 5 has the pressure difference switch schematic cross-sectional view of governor motion for the second embodiment of the present invention；
Fig. 6 has the pressure difference switch decomposing schematic representation of governor motion for the second embodiment of the present invention；
Fig. 7 has the pressure difference switch schematic cross-sectional view of governor motion for the 3rd embodiment of the present invention；
Fig. 8 has the pressure difference switch decomposing schematic representation of governor motion for the 3rd embodiment of the present invention.
Accompanying drawing identifier declaration：
10th, upper lid 11, the first accommodating cavity
12nd, alignment pin 20, lower cover
21st, the second accommodating cavity 22, pressure hole
23rd, projection 30, microswitch
40th, silica gel lid 41, through hole
50th, pushing block 51, middle cavity
52nd, holding section 60, spring
70th, governor motion 71, screwed hole
72nd, regulation lid 721, projection
722nd, adjustment hole 73, sealing ring
74th, set screw.
Embodiment
As shown in Figures 1 to 4, a kind of automatic control type pressure difference switch includes lid 10, lower cover 20, fine motion to the present invention
Switch 30, silica gel lid 40, pushing block 50 and spring 60, wherein：
Upper end of lid 10 has the first accommodating cavity 11 on this, and above-mentioned microswitch 30 is installed in first accommodating cavity 11, and
In being provided with the alignment pin 12 for fixing microswitch 30 on lid on this 10, microswitch 30 is fixed on by the alignment pin 12
In one accommodating cavity 11.
The lower cover 20 has the second accommodating cavity 21, and the upper lower end of lid 10 is installed in second accommodating cavity 21, and in the lower cover
20 sidepieces offer one and connect to connect the pressure hole 22 of negative pressure of vacuum with the second accommodating cavity 21；In the bottom interior wall of lower cover 20
On be provided with one and be used to fix the projection 23 of spring 60.
The silica gel lid 40 is in case shape, its can elastic floating formula be installed on the lower end of lid 10, and positioned at above-mentioned pressure hole 22
Top, a through hole 41 is provided with the middle part of silica gel lid 40.
The pushing block 50 is arranged in the through hole 41 of silica gel lid 40, cavity 51 during it has one, and in the upper and lower ends of pushing block 50
Being respectively arranged with one is used for the holding section 52 that anti-thrust block 50 is departed from by through hole 41, and the holding section 52 is blocked on the outer of through hole 41,
The top elastic floating formula of pushing block 50 is butted on above-mentioned microswitch 30.
The upper end of spring 60 is butted on the top of cavity 51 among pushing block 50, and lower end is placed on the projection 23 of lower cover 20.
As the second embodiment of the present invention, as shown in Figure 5,6, pressed in being provided with one on lower cover 20 for adjusting spring 60
The governor motion 70 of contracting amount；The governor motion 70 includes being arranged at the screwed hole 71 of the bottom of lower cover 20, can be combined on screwed hole 71
Interior regulation lid 72 and it is installed on the outer wall of regulation lid 72 to seal up the sealing in gap between regulation lid 72 and screwed hole 71
Circle 73, the upper end of regulation lid 72 is provided with a projection 721, and the above-mentioned lower end of spring 60 is placed on the projection 721, and in the regulation lid
72 bottoms are provided with the adjustment hole 722 for manual rotation；When adjusting 60 decrement of spring, by the hand Screw of adjustment hole 722 or
Unscrew regulation lid 72, you can regulation lid 72 is advanced or is retreated in screwed hole 71, so that, reach the adjustment decrement of spring 60
Purpose.
As the third embodiment of the present invention, as shown in Figure 7,8, pressed in being provided with one on lower cover 20 for adjusting spring 60
The governor motion 70 of contracting amount；The governor motion 70 includes the regulation lid 72 and sealing ring 73 being located in the second accommodating cavity 21 and set
Screwed hole 71 and set screw 74 in the bottom of lower cover 20, the sealing ring 73 are installed on the regulation outer wall of lid 72, in regulation lid 72
Upper end is provided with a projection 721, and the above-mentioned lower end of spring 60 is placed on the projection 721；The set screw 74 is installed on screwed hole 71
In, and the upper end of set screw 74 is butted on the lower section of regulation lid 72；When adjusting 60 decrement of spring, by rotating set screw 74, i.e.,
Advance or retreat during regulation lid 72 can be made in the second accommodating cavity 21, so that, reach the purpose of the adjustment decrement of spring 60.
The operation principle of the present invention is as follows：Negative pressure of vacuum is connected to pressure hole 22, into the second accommodating cavity 21, negative pressure production
Raw suction makes silica gel lid 40 toward bottom offset, and silica gel lid 40 drives pushing block 50 to move down, can be from after pushing block 50 is moved down
The contact of microswitch 30 is opened, the circuit in microswitch 30 just can be now disconnected, make system stalls；If opposite vacuum is born
When pressure is reduced, the suction that its negative pressure is produced then weakens, and pushing block 50 is then toward top offset under the effect of spring 60 so that pushing block 50 with it is micro-
The contact of dynamic switch 30, the circuit that just can now connect in microswitch 30 makes system automatic opening work.
First embodiment is non-adjustable scheme, because the size or hardness tolerance of each part add up so that vacuum tolerance
Than larger, but it can operate with the not high product of vacuum tolerance, it is cost-saved and reduce volume.
Second, third embodiment can adjust the upper-lower position of lid 72 by adjustment hole 722 or the adjustment of set screw 74, change
The decrement of spring 60 and obtain different dynamics, so as to change the negative-pressure sucking needed for pushing block 50, can so make pressure differential range control
10% or so or 1 ~ 3kpa in total negative pressure is made, is not in job insecurity or frequent normally on and normally off bad phenomenon, can press again
Automatic opening system work keeps vacuum pressure in the case of power loss is less.
The design focal point of the present invention is that the suction produced by using negative pressure moves down silica gel lid, utilizes spring
Elastic force pop up silica gel lid, the raising and lowering of silica gel lid realizes the Kick type working method of microswitch so that, it is real
Existing microswitch connecting and disconnecting of the circuit is automatically controlled, the microswitch accurately controls pressure differential range, it is to avoid pressure differential range is excessive
Or too small caused bad phenomenon occurs, also, the microswitch is lower relative to circuit control automatic switch production cost, body
Product is smaller, with the wide market space.
The above described is only a preferred embodiment of the present invention, be not intended to limit the scope of the present invention,
Therefore every technical spirit according to the present invention is to any subtle modifications, equivalent variations and modifications made for any of the above embodiments, still
Belong in the range of technical solution of the present invention.
Claims (10)
1. a kind of automatic control type pressure difference switch, it is characterised in that：Include lid, lower cover, microswitch, silica gel lid, pushing block
And spring, end has the first accommodating cavity on lid on this, and the microswitch is installed in the first accommodating cavity；The lower cover has second to hold
Chamber is put, upper lid lower end is installed in the second accommodating cavity, and one is offered in lower cover sidepiece and connected with the second accommodating cavity for connecing
The pressure hole of logical negative pressure of vacuum；The silica gel lid is in case shape, its can elastic floating formula be installed on lid lower end, and positioned at pressure hole
Top, a through hole is provided with the middle part of the silica gel lid；The pushing block is arranged in through hole, and one is respectively arranged with pushing block upper and lower ends
The holding section departed from for anti-thrust block by through hole, the holding section is blocked on through hole outer, and elastic floating formula is butted at the top of pushing block
On above-mentioned microswitch；The spring upper end is butted on below pushing block, and lower end is butted on lower lid；Negative pressure of vacuum enters second by pressure hole
In accommodating cavity, the suction that negative pressure is produced makes silica gel lid toward bottom offset, and silica gel cover strip is moved pushing block and moved down, after pushing block is moved down
Circuit in microswitch, microswitch is left to disconnect；When negative pressure of vacuum is reduced, the suction that negative pressure is produced weakens, and pushing block is in spring
Effect is lower to be in contact toward top offset with microswitch, and circuit is connected in microswitch.
2. automatic control type pressure difference switch according to claim 1, it is characterised in that：It is provided with the lower cover bottom interior wall
One projection, above-mentioned lower spring end is placed on the projection.
3. automatic control type pressure difference switch according to claim 1, it is characterised in that：One is provided with the lower lid is used to adjust
Save the governor motion of amount of spring compression.
4. automatic control type pressure difference switch according to claim 3, it is characterised in that：The governor motion includes being arranged at down
The screwed hole in base portion, the regulation lid that can be combined in screwed hole and be installed on regulation cover outer wall on seal up regulation lid and spiral shell
The sealing ring in gap between pit, above-mentioned lower spring end is butted on the regulation and covered.
5. automatic control type pressure difference switch according to claim 4, it is characterised in that：The regulation covers end, and to be provided with one convex
Post, above-mentioned lower spring end is placed on the projection.
6. automatic control type pressure difference switch according to claim 4, it is characterised in that：Regulation base portion, which is provided with, supplies hand
The adjustment hole of dynamic rotation.
7. automatic control type pressure difference switch according to claim 3, it is characterised in that：The governor motion includes being located at second
Regulation lid and sealing ring and the screwed hole and set screw that are arranged at lower cover bottom in accommodating cavity, the sealing ring are installed on regulation
On cover outer wall, above-mentioned lower spring end is butted on the regulation and covered, and the set screw is installed in screwed hole, and set screw upper end is supported
In regulation lid lower section.
8. automatic control type pressure difference switch according to claim 7, it is characterised in that：The regulation covers end, and to be provided with one convex
Post, above-mentioned lower spring end is placed on the projection.
9. automatic control type pressure difference switch according to claim 1, it is characterised in that：Cavity during the pushing block has one, on
State spring top and be butted on cavity top in this.
10. automatic control type pressure difference switch according to claim 1, it is characterised in that：It is provided with the upper lid for solid
Determine the alignment pin of microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448754.8A CN105047473B (en) | 2015-07-28 | 2015-07-28 | Automatic control type pressure difference switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510448754.8A CN105047473B (en) | 2015-07-28 | 2015-07-28 | Automatic control type pressure difference switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105047473A CN105047473A (en) | 2015-11-11 |
| CN105047473B true CN105047473B (en) | 2017-08-11 |
Family
ID=54453934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510448754.8A Active CN105047473B (en) | 2015-07-28 | 2015-07-28 | Automatic control type pressure difference switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105047473B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5369233A (en) * | 1992-01-24 | 1994-11-29 | Gallone; Cesare | Safety pressure sensor, in particular for microswitches |
| CN2392252Y (en) * | 1999-09-17 | 2000-08-16 | 常州高钧电器有限公司 | Negative pressure type wind pressure switch |
| CN2646854Y (en) * | 2003-08-29 | 2004-10-06 | 惠州惠达电子有限公司 | A wind pressure switch |
| CN201038057Y (en) * | 2007-03-29 | 2008-03-19 | 杨克庆 | Low-voltage switch with leak-proof self-protection function |
| CN202796731U (en) * | 2012-09-12 | 2013-03-13 | 浙江华地电子有限公司 | Wind pressure switch |
| CN202905598U (en) * | 2012-12-07 | 2013-04-24 | 温州九和电器科技有限公司 | Wind pressure switch |
| CN204155835U (en) * | 2014-11-03 | 2015-02-11 | 广东裕祥环保科技有限公司 | A kind of blast switch for gas heater or wall-hung boiler |
| CN204204742U (en) * | 2014-10-29 | 2015-03-11 | 余姚市嘉荣电子电器有限公司 | Blast switch |
| CN204348611U (en) * | 2014-11-06 | 2015-05-20 | 东莞市托圣斯电子科技有限公司 | Blast switch |
-
2015
- 2015-07-28 CN CN201510448754.8A patent/CN105047473B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5369233A (en) * | 1992-01-24 | 1994-11-29 | Gallone; Cesare | Safety pressure sensor, in particular for microswitches |
| CN2392252Y (en) * | 1999-09-17 | 2000-08-16 | 常州高钧电器有限公司 | Negative pressure type wind pressure switch |
| CN2646854Y (en) * | 2003-08-29 | 2004-10-06 | 惠州惠达电子有限公司 | A wind pressure switch |
| CN201038057Y (en) * | 2007-03-29 | 2008-03-19 | 杨克庆 | Low-voltage switch with leak-proof self-protection function |
| CN202796731U (en) * | 2012-09-12 | 2013-03-13 | 浙江华地电子有限公司 | Wind pressure switch |
| CN202905598U (en) * | 2012-12-07 | 2013-04-24 | 温州九和电器科技有限公司 | Wind pressure switch |
| CN204204742U (en) * | 2014-10-29 | 2015-03-11 | 余姚市嘉荣电子电器有限公司 | Blast switch |
| CN204155835U (en) * | 2014-11-03 | 2015-02-11 | 广东裕祥环保科技有限公司 | A kind of blast switch for gas heater or wall-hung boiler |
| CN204348611U (en) * | 2014-11-06 | 2015-05-20 | 东莞市托圣斯电子科技有限公司 | Blast switch |
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| Publication number | Publication date |
|---|---|
| CN105047473A (en) | 2015-11-11 |
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