CN105047473A - Automatic control differential pressure switch - Google Patents
Automatic control differential pressure switch Download PDFInfo
- Publication number
- CN105047473A CN105047473A CN201510448754.8A CN201510448754A CN105047473A CN 105047473 A CN105047473 A CN 105047473A CN 201510448754 A CN201510448754 A CN 201510448754A CN 105047473 A CN105047473 A CN 105047473A
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- China
- Prior art keywords
- cover
- hole
- automatic control
- spring
- adjustable cap
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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 invention discloses an automatic control differential pressure switch, which comprises an upper cover, a lower cover, a microswitch, a silicone cover, a push block and a spring, wherein a first accommodating cavity is formed in the upper end of the upper cover; the microswitch is arranged in the first accommodating cavity; a second accommodating cavity is formed in the lower cover; the lower end of the upper cover is arranged in the second accommodating cavity; an air pressure hole is formed in the side part of the lower cover; the silicone cover is in a housing form, is arranged at the lower end of the upper cover, and is located above the air pressure hole; a through hole is formed in the silicone cover; the push block is arranged in the through hole in a penetrating manner; blocking parts are respectively arranged at two ends of the push block, and are baffled on the outer edge of the through hole; the top part of the push block is propped against the microswitch in a floating manner; the upper end of the spring is propped against the lower part of the push block; and the lower end of the spring is propped against the lower cover. Therefore, the silicone cover is prompted to ascend and descend by negative pressure and the spring; automatic control on circuit connection and disconnection of the microswitch is realized; the differential pressure range can be accurately controlled; the bad phenomenon caused by an overlarge or oversmall differential pressure range is avoided; and the automatic control differential pressure switch is low in cost and small in size.
Description
Technical field
The present invention relates to power on/off switching device art, refer in particular to a kind of automatic control type pressure difference switch.
Background technology
The pressure difference switch that tradition controls to use in vacuum crisper automatically uses conductive pin to contact with conducting strip, stable not during work, and pressure differential range is difficult to control.Bad phenomenon is closed when small pressure difference scope is because holding when pressure reduction too little (as about 0.1kpa) can frequently occur; Large pressure differential range can reduce fresh-keeping effect because of pressure reduction too large (as about 10kpa).Also some control pressurer system then uses the action of control circui automatic switch, can increase cost and small product size like this.Therefore, tackle existing pressure difference switch and improve, to solve the problem.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide a kind of automatic control type pressure difference switch, impel silica gel to cover by utilizing negative pressure and spring rise and decline, realize the automatic control of sensitive switch connecting and disconnecting of the circuit, and accurately can control pressure differential range, avoid the excessive or too small bad phenomenon that causes of pressure differential range to occur, and cost is low, volume is little.
For achieving the above object, the present invention adopts following technical scheme:
A kind of automatic control type pressure difference switch, it includes upper cover, lower cover, sensitive switch, silica gel lid, pushing block and spring, and this upper cover upper end has the first containing cavity, and this sensitive switch is installed in the first containing cavity; This lower cover has the second containing cavity, and upper cover lower end is installed in the second containing cavity, and offers one in lower cover sidepiece and to be communicated with pressure hole for connecting negative pressure of vacuum with the second containing cavity; This silica gel lid is case shape, and it elastic floating formula can be installed on upper cover lower end, and is positioned at above pressure hole, in the middle part of this silica gel lid, be provided with a through hole; This pushing block is arranged in through hole, is respectively arranged with a holding section departed from by through hole for anti-thrust block in the upper and lower two ends of pushing block, and this holding section is blocked on through hole outer, and pushing block top elastic floating formula is butted on above-mentioned sensitive switch; This spring upper end is butted on below pushing block, and lower end is butted on down and covers; Negative pressure of vacuum enters in the second containing cavity by pressure hole, and the suction that negative pressure produces makes silica gel lid toward bottom offset, and silica gel cover strip is moved pushing block and moved down, and leaves sensitive switch after pushing block moves down, and in sensitive switch, circuit disconnects; When negative pressure of vacuum reduces, the suction that negative pressure produces weakens, and pushing block contacts toward top offset with sensitive switch under the action of the spring, circuit ON in sensitive switch.
As a kind of preferred version: described lower cover bottom interior wall is provided with a projection, and above-mentioned lower spring end is placed on this projection.
As a kind of preferred version: cover under described and be provided with one for the governor motion of regulating spring decrement.
As a kind of preferred version: described governor motion comprises and is arranged at screwed hole bottom lower cover, can be combined on the adjustable cap in screwed hole and be installed on to seal up the sealing ring in gap between adjustable cap and screwed hole on adjustable cap outer wall, and above-mentioned lower spring end is butted on this adjustable cap.
As a kind of preferred version: described adjustable cap upper end is provided with a projection, and above-mentioned lower spring end is placed on this projection.
As a kind of preferred version: be provided with the adjustment hole for manual rotation bottom described adjustable cap.
As a kind of preferred version: described governor motion comprises the adjustable cap and sealing ring that are arranged in the second containing cavity and the screwed hole be arranged at bottom lower cover and set screw, sealing circle is installed on adjustable cap outer wall, above-mentioned lower spring end is butted on this adjustable cap, this set screw is installed in screwed hole, and set screw upper end is butted on below adjustable cap.
As a kind of preferred version: described adjustable cap upper end is provided with a projection, and above-mentioned lower spring end is placed on this projection.
As a kind of preferred version: described pushing block has a cavity, above-mentioned spring top is butted on this cavity top.
As a kind of preferred version: cover the alignment pin be provided with for fixing sensitive switch on described.
The present invention compared with prior art has obvious advantage and beneficial effect, specifically, as shown from the above technical solution, the suction produced by utilizing negative pressure makes silica gel lid move down, utilize the elastic force of spring that silica gel lid is popped up, the rising of silica gel lid and decline realize the Kick type working method of sensitive switch, thus, realize the automatic control of sensitive switch connecting and disconnecting of the circuit, this sensitive switch accurately can control pressure differential range, avoid the excessive or too small bad phenomenon that causes of pressure differential range to occur, and, this sensitive switch is lower relative to control circui automatic switch production cost, volume is less, there is the wide market space.
For more clearly setting forth architectural feature of the present invention and effect, be described in detail below in conjunction with accompanying drawing and specific embodiment.
Accompanying drawing explanation
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 cross-sectional schematic not arranging governor motion of the present invention;
Fig. 4 is the pressure difference switch decomposing schematic representation not arranging governor motion of the present invention;
Fig. 5 is the pressure difference switch cross-sectional schematic that second embodiment of the present invention has governor motion;
Fig. 6 is the pressure difference switch decomposing schematic representation that second embodiment of the present invention has governor motion;
Fig. 7 is the pressure difference switch cross-sectional schematic that the 3rd embodiment of the present invention has governor motion;
Fig. 8 is the pressure difference switch decomposing schematic representation that the 3rd embodiment of the present invention has governor motion.
accompanying drawing identifier declaration:
10, upper cover 11, first containing cavity
12, alignment pin 20, lower cover
21, the second containing cavity 22, pressure hole
23, projection 30, sensitive switch
40, silica gel lid 41, through hole
50, pushing block 51, cavity
52, holding section 60, spring
70, governor motion 71, screwed hole
72, adjustable cap 721, projection
722, adjustment hole 73, sealing ring
74, set screw.
Embodiment
As shown in Figures 1 to 4, a kind of automatic control type pressure difference switch, includes upper cover 10, lower cover 20, sensitive switch 30, silica gel lid 40, pushing block 50 and spring 60 in the present invention, wherein:
This upper cover 10 upper end has the first containing cavity 11, and above-mentioned sensitive switch 30 is installed in this first containing cavity 11, and is provided with the alignment pin 12 for fixing sensitive switch 30 on this upper cover 10, and sensitive switch 30 is fixed in the first containing cavity 11 by this alignment pin 12.
This lower cover 20 has the second containing cavity 21, and upper cover 10 lower end is installed in this second containing cavity 21, and offers one in this lower cover 20 sidepiece and to be communicated with pressure hole 22 for connecting negative pressure of vacuum with the second containing cavity 21; One is provided with for the projection 23 of fixing spring 60 in lower cover 20 bottom interior wall.
This silica gel lid 40 is in case shape, and it elastic floating formula can be installed on upper cover 10 lower end, and is positioned at above above-mentioned pressure hole 22, is provided with a through hole 41 in the middle part of this silica gel lid 40.
This pushing block 50 is arranged in the through hole 41 of silica gel lid 40, it has a cavity 51, and be respectively arranged with a holding section 52 departed from by through hole 41 for anti-thrust block 50 in pushing block about 50 two ends, this holding section 52 is blocked on through hole 41 outer, and pushing block 50 top elastic floating formula is butted on above-mentioned sensitive switch 30.
This spring 60 upper end is butted on cavity 51 top of 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, on lower cover 20, one is provided with for the governor motion 70 of regulating spring 60 decrement; This governor motion 70 comprises and is arranged at screwed hole 71 bottom lower cover 20, can be combined on the adjustable cap 72 in screwed hole 71 and be installed on this adjustable cap 72 outer wall to seal up the sealing ring 73 in gap between adjustable cap 72 and screwed hole 71, this adjustable cap 72 upper end is provided with a projection 721, above-mentioned spring 60 lower end is placed on this projection 721, and bottom this adjustable cap 72, be provided with the adjustment hole 722 for manual rotation; During regulating spring 60 decrement, by adjustment hole 722 hand Screw or unscrew adjustable cap 72, adjustable cap 72 can be made to advance in screwed hole 71 or retreat, thus, reach the object of adjustment spring 60 decrement.
As the third embodiment of the present invention, as shown in Figure 7,8, on lower cover 20, one is provided with for the governor motion 70 of regulating spring 60 decrement; This governor motion 70 comprises the adjustable cap 72 and sealing ring 73 that are arranged in the second containing cavity 21 and the screwed hole 71 be arranged at bottom lower cover 20 and set screw 74, sealing circle 73 is installed on adjustable cap 72 outer wall, adjustable cap 72 upper end is provided with a projection 721, and above-mentioned spring 60 lower end is placed on this projection 721; This set screw 74 is installed in screwed hole 71, and set screw 74 upper end is butted on below adjustable cap 72; During regulating spring 60 decrement, by rotating set screw 74, advancing in can making adjustable cap 72 in the second containing cavity 21 or retreating, thus, reach the object of adjustment spring 60 decrement.
Operation principle of the present invention is as follows: negative pressure of vacuum is connected to pressure hole 22, enter in the second containing cavity 21, the suction that negative pressure produces makes silica gel lid 40 toward bottom offset, silica gel lid 40 drives pushing block 50 to move down, the contact of sensitive switch 30 can be left after pushing block 50 moves down, now just can disconnect the circuit in sensitive switch 30, make system stalls; If when contrary negative pressure of vacuum reduces, the suction that its negative pressure produces then weakens, pushing block 50 toward top offset, makes pushing block 50 and the contact of sensitive switch 30, now just can connect the circuit in sensitive switch 30, make system automatically open work under spring 60 acts on.
First embodiment is non-adjustable scheme, because the size of each part or hardness tolerance add up, makes vacuum degree tolerance larger, but can apply to the not high product of vacuum degree tolerance, cost-saved and reduced volume.
Second, third embodiment adjusts the upper-lower position of adjustable cap 72 by adjustment hole 722 or set screw 74, change spring 60 decrement and obtain different dynamics, thus the negative-pressure sucking changed needed for pushing block 50, such about 10% or 1 ~ 3kpa that pressure differential range can be made to control in total negative pressure, there will not be job insecurity or frequent time close bad phenomenon when opening, in the less situation of the pressure loss, automatic opening system work can keep vacuum pressure again.
Design focal point of the present invention is, the suction produced by utilizing negative pressure makes silica gel lid move down, utilize the elastic force of spring that silica gel lid is popped up, the rising of silica gel lid and decline realize the Kick type working method of sensitive switch, thus, realize the automatic control of sensitive switch connecting and disconnecting of the circuit, this sensitive switch accurately can control pressure differential range, avoid the excessive or too small bad phenomenon that causes of pressure differential range to occur, and, this sensitive switch is lower relative to control circui automatic switch production cost, and volume is less, has the wide market space.
The above, it is only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, thus every according to technical spirit of the present invention to any trickle amendment made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. an automatic control type pressure difference switch, is characterized in that: include upper cover, lower cover, sensitive switch, silica gel lid, pushing block and spring, and this upper cover upper end has the first containing cavity, and this sensitive switch is installed in the first containing cavity; This lower cover has the second containing cavity, and upper cover lower end is installed in the second containing cavity, and offers one in lower cover sidepiece and to be communicated with pressure hole for connecting negative pressure of vacuum with the second containing cavity; This silica gel lid is case shape, and it elastic floating formula can be installed on upper cover lower end, and is positioned at above pressure hole, in the middle part of this silica gel lid, be provided with a through hole; This pushing block is arranged in through hole, is respectively arranged with a holding section departed from by through hole for anti-thrust block in the upper and lower two ends of pushing block, and this holding section is blocked on through hole outer, and pushing block top elastic floating formula is butted on above-mentioned sensitive switch; This spring upper end is butted on below pushing block, and lower end is butted on down and covers; Negative pressure of vacuum enters in the second containing cavity by pressure hole, and the suction that negative pressure produces makes silica gel lid toward bottom offset, and silica gel cover strip is moved pushing block and moved down, and leaves sensitive switch after pushing block moves down, and in sensitive switch, circuit disconnects; When negative pressure of vacuum reduces, the suction that negative pressure produces weakens, and pushing block contacts toward top offset with sensitive switch under the action of the spring, circuit ON in sensitive switch.
2. automatic control type pressure difference switch according to claim 1, is characterized in that: described lower cover bottom interior wall is provided with a projection, and above-mentioned lower spring end is placed on this projection.
3. automatic control type pressure difference switch according to claim 1, is characterized in that: cover under described and be provided with one for the governor motion of regulating spring decrement.
4. automatic control type pressure difference switch according to claim 3, it is characterized in that: described governor motion comprises and is arranged at screwed hole bottom lower cover, can be combined on the adjustable cap in screwed hole and be installed on to seal up the sealing ring in gap between adjustable cap and screwed hole on adjustable cap outer wall, and above-mentioned lower spring end is butted on this adjustable cap.
5. automatic control type pressure difference switch according to claim 4, is characterized in that: described adjustable cap upper end is provided with a projection, and above-mentioned lower spring end is placed on this projection.
6. automatic control type pressure difference switch according to claim 4, is characterized in that: be provided with the adjustment hole for manual rotation bottom described adjustable cap.
7. automatic control type pressure difference switch according to claim 3, it is characterized in that: described governor motion comprises the adjustable cap and sealing ring that are arranged in the second containing cavity and the screwed hole be arranged at bottom lower cover and set screw, sealing circle is installed on adjustable cap outer wall, above-mentioned lower spring end is butted on this adjustable cap, this set screw is installed in screwed hole, and set screw upper end is butted on below adjustable cap.
8. automatic control type pressure difference switch according to claim 7, is characterized in that: described adjustable cap upper end is provided with a projection, and above-mentioned lower spring end is placed on this projection.
9. automatic control type pressure difference switch according to claim 1, it is characterized in that: described pushing block has a cavity, above-mentioned spring top is butted on this cavity top.
10. automatic control type pressure difference switch according to claim 1, is characterized in that: cover the alignment pin be provided with for fixing sensitive switch on described.
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 true CN105047473A (en) | 2015-11-11 |
| CN105047473B CN105047473B (en) | 2017-08-11 |
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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 |
|---|---|
| CN105047473B (en) | 2017-08-11 |
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