CN204332823U - Novel contactless blast switch - Google Patents
Novel contactless blast switch Download PDFInfo
- Publication number
- CN204332823U CN204332823U CN201520016981.9U CN201520016981U CN204332823U CN 204332823 U CN204332823 U CN 204332823U CN 201520016981 U CN201520016981 U CN 201520016981U CN 204332823 U CN204332823 U CN 204332823U
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- fore shell
- back cover
- circuit board
- negative pressure
- flexible sheet
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Abstract
The utility model discloses novel contactless blast switch, comprise fore shell, back cover, clamp flexible diaphragm between described fore shell, back cover, flexible sheet will be divided into negative pressure cavity and malleation chamber in fore shell and back casing, negative pressure cavity is in fore shell portion, and malleation chamber is in back cover portion; Described fore shell and back cover are equipped with blast connection; It is characterized in that: described back cover inwall is provided with metal clips, and metal clips tail end is connected with fixed leg, the flexible sheet that fixed leg is connected to face, malleation chamber is middle fixing; Magnet is fixed with in the middle of the flexible sheet in described negative pressure cavity face; Be fixed with a circuit board in the middle of outside described fore shell, circuit board weld Hall element, Hall element and magnet is close turn-on power when producing magnetic field effect, away from time deenergization; Described circuit board is connected with binding post.The wind pressure value of this product when the spring, summer, autumn and winter is the same, can not produce leeway because of weather or variations in temperature, the advantages such as durable in use, pressure measurement is accurate.
Description
Technical field
The utility model relates to blast switch device, specifically novel contactless blast switch.
Background technology
Existing blast switch is a kind of mechanical type step switch, in actual use, there is a lot of problem, below with regard to blast switch in actual use produced problem simply analyze, wall-hung boiler difficulty in starting majority is because blast switch causes, the reason of the inefficacy of blast switch is caused to have: 1, because the kinetic energy of blast is very little, manufacturer is when design wind pressure switch, the triggering moment of sensitive switch must be reduced, if and to reduce trigger moment, then must reduce in sensitive switch, the gauge of moving plate and sheet of energy, only in this way could reduce to trigger moment, blast switch is normally worked, and the reduction of moving plate and sheet of energy thickness, bring moving plate and sheet of energy to be easily out of shape and to cause blast switch to lose efficacy, opening and closing value is unstable, 2, due to the microswitch structure impact in blast switch, the unlatching triggering moment of sensitive switch is different with closedown triggering moment, create opening and closing pressure reduction, and the startup of pressure reduction to wall-hung boiler is disadvantageous, just should starts as long as wall-hung boiler blast exceedes protection value, 3, the reason of structure causes blast switch easily by the impact of external force, and blast switch keying value is changed, and cause blast switch to lose efficacy, falling of such as blast switch is touched, vibrations, 4, long-term use, makes sensitive switch contact oxidation that sensitive switch was lost efficacy.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of waterproof, reliable, with low cost, the life-span long, realized the novel contactless blast switch of break-make power supply by Hall switch sensor.
The scheme solved the problems of the technologies described above is:
A kind of novel contactless blast switch, comprise fore shell (1), back cover (2), flexible diaphragm (3) is clamped between described fore shell (1), back cover (2), flexible sheet (3) is divided into negative pressure cavity (4) and malleation chamber (5) by fore shell (1) and back cover (2) body, negative pressure cavity (4) is in fore shell (1) portion, and malleation chamber (5) are in back cover (2) portion; Described fore shell (1) and back cover (2) are equipped with blast connection (6); Described back cover (2) inwall is provided with metal clips (21), metal clips (21) tail end is connected with fixed leg (22), and the flexible sheet (3) that fixed leg (22) is connected to malleation chamber (5) face is middle fixing; Described negative pressure cavity (4) face flexible sheet (3) in the middle of be fixed with magnet (7); A circuit board (8) is fixed with in the middle of described fore shell (1) outside, circuit board (8) is welded with Hall switch sensor (81), Hall switch sensor (81) and magnet (7) close to turn-on power when producing magnetic field effect, away from time deenergization; Described circuit board (8) is connected with binding post (9).
Advantage of the present utility model is:
The circuit board of this product and Hall element are installed on the outside of housing, can not affect the short circuit of circuit, so play waterproof action because of having condensed water in positive/negative-pressure chamber; Fore shell, back cover are plastics manufacture, although Hall element has separating of fore shell, but plastic housing can't demagnetization, so energy turn-on power, leaves rear powered-down when magnet is near Hall element, fundamentally solve the disadvantage of original blast switch, unlatching value and close value synchronously, not by temperature Change, through-flow wind effect, adopt blast to be set in same wind pressure value and close or start wall-hung boiler power supply; Wind pressure value when the spring, summer, autumn and winter is the same, can not produce leeway because of weather or variations in temperature, the advantages such as durable in use, pressure measurement is accurate.
Accompanying drawing explanation
Fig. 1 is the cutaway view under non operating state of the present utility model;
Fig. 2 is the cutaway view under operating state of the present utility model;
Fig. 3 is the amplification view at A place on the right side of Fig. 1;
Fig. 4 is the fundamental diagram of this practical Hall switch sensor.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows: a kind of novel contactless blast switch, comprise fore shell 1, back cover 2, flexible diaphragm 3 is clamped between described fore shell 1, back cover 2, flexible sheet 3 is divided into negative pressure cavity 4 and malleation chamber 5 by fore shell 1 and back cover 2 body, negative pressure cavity 4 is in fore shell 1, and malleation chamber 5 is in back cover 2; Described fore shell 1 and back cover 2 are equipped with blast connection 6; It is characterized in that: described back cover 2 inwall is provided with metal clips 21, and metal clips 21 tail end is connected with fixed leg 22, the flexible sheet 3 that fixed leg 22 is connected to 5, malleation chamber is middle fixing; Described negative pressure cavity 4 flexible sheet 3 in the middle of be fixed with magnet 7; A circuit board 8 is fixed with in the middle of outside described fore shell 1, circuit board 8 is welded with Hall element 81, Hall element 81 and magnet 7 are close to turn-on power when producing magnetic field effect, away from time deenergization, Hall conducting and disconnection drive operational amplifier in order to control the startup and shutdown of wall-hung boiler main control board; Described circuit board 8 is connected with binding post 9.
Hall element 81 is line style Hall element or Hall switch sensor.
This practical product is mounted in the top of wall-hung boiler, the blast connection 6 of fore shell 1 is connected by the air channel of exhaust column and wall-hung boiler blower fan, in use, when after fan starting exhausting, when air draught is produced to the negative pressure cavity 4 of fore shell 1, flexible sheet 3 pressurized and shrinking, while shrinking, magnet 7 in the middle of flexible sheet 3 is close to Hall element 81, when the magnetic force of magnet 7 reaches Hall element 81 voltage turn-on value, Hall element 81 turn-on power, operational amplifier in Hall conducting driver circuit plate is in order to control the start of wall-hung boiler main control board, then wall-hung boiler igniting is started, open gas valve, enter wall-hung boiler fired state, when blower fan exhausting is lower than wind pressure value, metal clips 21 by self reseting elasticity the magnet 7 be fixed in the middle of flexible sheet 3 away from Hall element 81, when the magnetic force that Hall element 81 obtains is lower than voltage turn-on value, become power-off, thus make wall-hung boiler auto extinguishing, closing gas valve, ensure the fail safe using product, this product structure does not affect work by the spring, summer, autumn and winter because of weather or variations in temperature.
Above embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that the common engineers and technicians in this area make the technical solution of the utility model and improvement, all should fall in protection range that claims of the present utility model determine.
Claims (1)
1. novel contactless blast switch, comprise fore shell (1), back cover (2), flexible diaphragm (3) is clamped between described fore shell (1), back cover (2), flexible sheet (3) is divided into negative pressure cavity (4) and malleation chamber (5) by fore shell (1) and back cover (2) body, negative pressure cavity (4) is in fore shell (1) portion, and malleation chamber (5) are in back cover (2) portion; Described fore shell (1) and back cover (2) are equipped with blast connection (6); It is characterized in that: described back cover (2) inwall is provided with metal clips (21), metal clips (21) tail end is connected with fixed leg (22), and the flexible sheet (3) that fixed leg (22) is connected to malleation chamber (5) face is middle fixing; Magnet (7) is fixed with in the middle of the flexible sheet (3) in described negative pressure cavity (4) face; A circuit board (8) is fixed with in the middle of described fore shell (1) outside, circuit board (8) welds Hall element (81), Hall element (81) and magnet (7) close to turn-on power when producing magnetic field effect, away from time deenergization; Described circuit board (8) is connected with binding post (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520016981.9U CN204332823U (en) | 2015-01-09 | 2015-01-09 | Novel contactless blast switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520016981.9U CN204332823U (en) | 2015-01-09 | 2015-01-09 | Novel contactless blast switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204332823U true CN204332823U (en) | 2015-05-13 |
Family
ID=53169149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520016981.9U Active CN204332823U (en) | 2015-01-09 | 2015-01-09 | Novel contactless blast switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204332823U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298361A (en) * | 2016-10-10 | 2017-01-04 | 黄思亮 | A kind of blast switch of vertical movement |
-
2015
- 2015-01-09 CN CN201520016981.9U patent/CN204332823U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298361A (en) * | 2016-10-10 | 2017-01-04 | 黄思亮 | A kind of blast switch of vertical movement |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |