CN101271607A - Parallel connection thermosensitive temperature-sensing combined switch - Google Patents
Parallel connection thermosensitive temperature-sensing combined switch Download PDFInfo
- Publication number
- CN101271607A CN101271607A CNA2008100240809A CN200810024080A CN101271607A CN 101271607 A CN101271607 A CN 101271607A CN A2008100240809 A CNA2008100240809 A CN A2008100240809A CN 200810024080 A CN200810024080 A CN 200810024080A CN 101271607 A CN101271607 A CN 101271607A
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- shell
- silver
- bimetallic element
- fixed terminal
- outer cover
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Abstract
The invention discloses a temperature sensitive combination switch parallel connection with simple and rational structure, convenient use, high sensitivity and good reliability in the technical field of a temperature sensitive switch; an outer cover is provided with a cavity; some fixed terminals stretch into the cavity of the outer cover from an end of the outer cover; the other fixed terminals are arranged outside the outer cover; a bimetallic element is fixedly arranged in the cavity of the outer cover; one end of the bimetallic element is connected electrically with the fixed terminal in the cavity of the outer cover; a silver contact is arranged on a lower side face or an upper side face of another end of the bimetallic element; a silver contact piece is correspondingly arranged above or under the bimetallic element; one end of the silver contact piece is detached from the silver contact; a pin of a thermal resistor is connected electrically with another end of the silver contact piece; another pin of the thermal resistor is connected electrically with the fixed terminal; one end of a welding terminal is connected electrically with the silver contact piece; and another end of the welding terminal stretches out from another end of the outer cover and is arranged outside the outer cover.
Description
Technical field
The invention belongs to thermosensitive temperature-sensing switching technique field, relate in particular to a kind of single control and often open parallel circuit type thermosensitive temperature-sensing combined switch.
Background technology
Existing beyond retrievable temperature sensing cable adopts the form of twisted-pair feeder or concentric cable mostly, its skin is surrounded by the temperature-sensitive insulating material respectively, be high-impedance state between two leads of normal monitoring state, when the environment temperature rising meets or exceeds predetermined value, the lead short circuit is low resistive state, thereby sends fire alarm signal.This class detector adopts switching signal, thus be not subjected to electromagnetic interference effect substantially, but there are the following problems: the principle of beyond retrievable temperature sensing cable has determined it in case report to the police, and just must change, and has increased use cost.The existing temperature sensing cable that recovers is made up of the four-core copper conductor, and every current carrying conductor is covered with the insulating material that one deck has negative temperature coefficient feature, four leads evenly strand together, when forming system end in twos short circuit become two relatively monitoring circuits mutually.Variation of ambient temperature passes to the control interface module by temperature sensing cable, because the anti-electromagnetic interference capability of temperature sensing cable is poor, causes wrong report easily.
Summary of the invention
Technical matters to be solved by this invention provides a kind of simple and reasonable, and is easy to use, highly sensitive, the parallel connection thermosensitive temperature-sensing combined switch of good reliability.
The present invention includes shell, fixed terminal, bimetallic element, silver-colored contact, thermistor and solder terminal; Described shell is provided with an inner chamber; Part fixed terminal extend into the shell inner cavity from an end of shell, and a part of in addition fixed terminal is in outside the shell; Bimetallic element fixedly places the inner chamber of shell, and an end of bimetallic element is electrically connected mutually with the fixed terminal in being in shell inner cavity; On the downside of the other end of described bimetallic element or upper side, a silver contact is set; The silver contact is arranged in the below or the top of bimetallic element accordingly, and an end and the silver contact of silver-colored contact are separated; One pin of thermistor is electrically connected mutually with the other end of silver-colored contact, and another pin of thermistor is electrically connected with fixed terminal; One end of solder terminal is electrically connected mutually with silver-colored contact, and the other end of solder terminal stretches out from the other end of shell, is in outside the shell.
As improvement of the present invention, in the inner chamber of described shell, arrange a holder, the fixed terminal and the silver-colored contact that are in the shell inner cavity are embedded on the holder.
As improvement of the present invention, also comprise a tie, an end of described tie is connected electrically on the fixed terminal, and the other end of tie is connected electrically on another pin of thermistor.
Improve as of the present invention, other comprises a plate again, and described plate is embedded on the holder, and another pin of thermistor is fixedly connected in the plate.
As improvement of the present invention, epoxy sealing is passed through at the two ends of shell.
The course of work of the present invention is as follows: fixed terminal and solder terminal are inserted in the electric loop, and electric current is imported by fixed terminal, and the thermistor of flowing through is exported by solder terminal.Because of the resistance of application thermistor is directly proportional with temperature, so along with ambient temperature raises, the resistance between two-terminal also increases accordingly.When ambient temperature reaches certain temperature, the bimetallic element counteragent, silver contact contacts with silver-colored contact, and electric current is from fixed terminal input process bimetallic element, silver-colored contact, export from solder terminal at last, thereby the resistance between two-terminal can sharply reduce suddenly.Can judge the action of this combined switch this moment on monitoring instrument, this temperature occurs unusual, reaches the purpose of warning.After fault was got rid of, ambient temperature reduced, the bimetallic element action, and silver contact separates with silver-colored contact, and electric current is again from the fixed terminal input, and the thermistor of flowing through is exported from solder terminal, and this combined switch continues the temperature of this point is monitored.
The amount of parts that the present invention uses is few, simple and reasonable; Switch work realizes by bimetallic element temperature distortion principle, thereby it is highly sensitive that the present invention is had, and the temperature-sensitive effect is obvious, reliable in action, the characteristics that temperature-sensitive point is stable.And the present invention is used to be installed in temperature sensing cable, and it is strong, reusable to have an antijamming capability, the advantage that maintenance cost is low.
Holder is used for fixing each parts of installing in the inner chamber of the present invention.
Tie can be convenient to being electrically connected of thermistor and fixed terminal.
Plate is thermistor firmly.
Shell two ends epoxy sealing may effectively stop moisture, moisture to enter enclosure interior, has prolonged serviceable life of the present invention greatly.
Description of drawings
Fig. 1 is a kind of side-looking structural representation of the present invention.
Fig. 2 is a kind of plan structure synoptic diagram of the present invention.
Embodiment
As shown in Figure 1, an end of shell 1 is opened an osculum, the complete opening of the other end, and described shell 1 is provided with an inner chamber.In the inner chamber of above-mentioned shell 1, arrange a holder 2, filling epoxy resin between the surface of internal cavity of holder 2 and shell 1, thus holder 2 is encapsulated in the inner chamber of shell 1.
Part fixed terminal 3 extend into the inner chamber of shell 1 from the osculum end of an end setting of shell 1, is embedded on the described holder 2 sealing epoxy resin between the blind end of described fixed terminal 3 and shell 1; A part of in addition fixed terminal 3 is in outside the shell 1.
Arrange a bimetallic element 4 in the inner chamber of described shell 1, described bimetallic element 4 is embedded on the holder 2, and an end of bimetallic element 4 is welded on the fixed terminal 3 that is in shell 1 inner chamber.
Welding one silver contact 5 on the downside of the other end of described bimetallic element 4.Arranged beneath one silver medal contact 6 at described bimetallic element 4, the upper surface and the silver contact 5 of one end of described silver-colored contact 6 are separated from each other, one pin 7-1 of the other end of described silver-colored contact 6 and thermistor 7 is welded to each other, and silver-colored contact 6 also is embedded on the holder 2.Welding one solder terminal 8 on silver-colored contact 6, a part of solder terminal 8 stretches out from the openend of shell 1 and is in outside the shell 1.
Another pin 7-2 of described thermistor 7 is electrically connected with an end of a tie 9, and the other end of tie 9 is electrically connected with fixed terminal 3.
At the open end encapsulating epoxy resin of described shell 1, thereby thermistor 7, solder terminal 8, plate 10 are welded to each other continuous assembly seals.Part thermistor 7 also is in outside the shell 1.
Claims (5)
1, a kind of parallel connection thermosensitive temperature-sensing combined switch is characterized in that: comprise shell, fixed terminal, bimetallic element, silver-colored contact, thermistor and solder terminal; Described shell is provided with an inner chamber; Part fixed terminal extend into the shell inner cavity from an end of shell, and a part of in addition fixed terminal is in outside the shell; Bimetallic element fixedly places the inner chamber of shell, and an end of bimetallic element is electrically connected mutually with the fixed terminal in being in shell inner cavity; On the downside of the other end of described bimetallic element or upper side, a silver contact is set; The silver contact is arranged in the below or the top of bimetallic element accordingly, and an end and the silver contact of silver-colored contact are separated; One pin of thermistor is electrically connected mutually with the other end of silver-colored contact, and another pin of thermistor is electrically connected with fixed terminal; One end of solder terminal is electrically connected mutually with silver-colored contact, and the other end of solder terminal stretches out from the other end of shell, is in outside the shell.
2, a kind of parallel connection thermosensitive temperature-sensing combined switch as claimed in claim 1 is characterized in that: arrange a holder in the inner chamber of described shell, the fixed terminal and the silver-colored contact that are in the shell inner cavity are embedded on the holder.
3, a kind of parallel connection thermosensitive temperature-sensing combined switch as claimed in claim 1 is characterized in that: also comprise a tie, an end of described tie is connected electrically on the fixed terminal, and the other end of tie is connected electrically on another pin of thermistor.
4, as claim 2 or 3 described a kind of parallel connection thermosensitive temperature-sensing combined switch, it is characterized in that: other comprises a plate, and described plate is embedded on the holder, and another pin of thermistor is fixedly connected in the plate.
5, as claim 1 or 2 or 3 described a kind of parallel connection thermosensitive temperature-sensing combined switch, it is characterized in that: epoxy sealing is passed through at the two ends of shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100240809A CN101271607B (en) | 2008-04-28 | 2008-04-28 | Parallel connection thermosensitive temperature-sensing combined switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100240809A CN101271607B (en) | 2008-04-28 | 2008-04-28 | Parallel connection thermosensitive temperature-sensing combined switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101271607A true CN101271607A (en) | 2008-09-24 |
| CN101271607B CN101271607B (en) | 2012-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100240809A Active CN101271607B (en) | 2008-04-28 | 2008-04-28 | Parallel connection thermosensitive temperature-sensing combined switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101271607B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819905A (en) * | 2010-04-09 | 2010-09-01 | 扬州精创汽摩配件有限公司 | Built-in protector for electric heating tube |
| CN102568958A (en) * | 2011-12-31 | 2012-07-11 | 上海长园维安电子线路保护股份有限公司 | Self-hold over-current protection device |
-
2008
- 2008-04-28 CN CN2008100240809A patent/CN101271607B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819905A (en) * | 2010-04-09 | 2010-09-01 | 扬州精创汽摩配件有限公司 | Built-in protector for electric heating tube |
| CN101819905B (en) * | 2010-04-09 | 2012-09-26 | 扬州宝珠电器有限公司 | Built-in protector for electric heating tube |
| CN102568958A (en) * | 2011-12-31 | 2012-07-11 | 上海长园维安电子线路保护股份有限公司 | Self-hold over-current protection device |
| CN102568958B (en) * | 2011-12-31 | 2016-09-28 | 上海长园维安电子线路保护有限公司 | Self-hold over-current protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101271607B (en) | 2012-05-09 |
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