CN201084248Y - A linear-type temperature sensing fire detector - Google Patents
A linear-type temperature sensing fire detector Download PDFInfo
- Publication number
- CN201084248Y CN201084248Y CNU2007200999711U CN200720099971U CN201084248Y CN 201084248 Y CN201084248 Y CN 201084248Y CN U2007200999711 U CNU2007200999711 U CN U2007200999711U CN 200720099971 U CN200720099971 U CN 200720099971U CN 201084248 Y CN201084248 Y CN 201084248Y
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- resistance
- linear temperature
- temperature sensor
- type heat
- line
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Abstract
The utility model discloses a linear fire temperature-sensing detector, which comprises a linear temperature-sensing element, a converter box connected with one end of the linear temperature-sensing element, a terminal resistance connected with the other end of the linear temperature-sensing element, wherein, the linear temperature-sensing element comprises two detecting conductors arranged in parallel, a plurality of thermosensitive barrier layers arranged between the detecting conductors in parallel, a normally open switch and a resistance which are connected in series and then are connected between two signal input terminals of the converter box in parallel. The utility model is characterized in that a normally open switch and a resistance are connected in parallel between the two signal input terminals of the converter box, when the terminal resistance is disconnected, the converter box can alarm fire normally. The utility model has the advantages of simple circuit, easy control and improved alarm reliability.
Description
Technical field
The present invention relates to a kind of fire detector, particularly a kind of line-type heat detector.
Background technology
Line-type heat detector commonly used at present is a kind of broad-spectrum fire detector.Fig. 1 is a kind of line-type heat detector structural representation of prior art.As shown in Figure 1, the line-type heat detector of this prior art comprises linear temperature sensor 1; Be connected an end of linear temperature sensor 1, can be in real time the warning electrical quantity of linear temperature sensor 1 be detected, and when the electrical quantity that detects surpasses setting value, send the boxcar 2 of fire alarm signal; With the other end that is connected linear temperature sensor 1, has the terminal resistance 3 of the supervision effect of opening circuit; Wherein linear temperature sensor 1 comprises detecting conductor 4,5 and parallel sensitive characteristic (NTC, PTC or CTR characteristic) the material barrier layer 6 that is arranged between the detecting conductor 4,5 that two parallel (coaxial, stranded or parallel) are provided with.But, there is following point in the line-type heat detector of this prior art: after the terminal resistance 3 that is connected linear temperature sensor 1 one ends goes offline, the problem that alarm temperature raises will appear in this fire detector, thereby causes alarm temperature not accurate enough.In order to address this problem, the researchist has worked out a kind ofly is replaced by the line-type heat detector of electronic switch 7 with terminal resistance 3, and its structure is seen Fig. 2.At this moment, boxcar 2 alternately detects open circuit fault and fire alarm information by the disconnection and the closure of control electronic switch 7.But, owing to have the line capacitance effect between the detecting conductor 4,5 of linear temperature sensor 1 on this fire detector, so the switching cycle of electronic switch 7 is long, will influence the alarm time of fire detector like this.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of terminal resistance to go offline after, boxcar still can normally carry out the line-type heat detector of fire alarm.
In order to achieve the above object, line-type heat detector provided by the invention comprises linear temperature sensor; Be connected an end of linear temperature sensor, can be in real time the warning electrical quantity of linear temperature sensor be detected, and when the electrical quantity that detects surpasses setting value, send the boxcar of fire alarm signal; With the other end that is connected linear temperature sensor, has the terminal resistance of the supervision effect of opening circuit; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and the parallel sensitive characteristic material barrier layer that is arranged between the detecting conductor; Described line-type heat detector also comprises and being attempted by between two signal input terminals of boxcar, and a normal open switch and a resistor of being serially connected mutually.
The resistance of described resistor equates with the resistance of terminal resistance or is unequal.
Line-type heat detector provided by the invention is between two signal input terminals of boxcar and connects a normal open switch and a resistor, like this after terminal resistance goes offline, boxcar still can normally carry out fire alarm, therefore can improve the warning reliability of fire detector.In addition, this fire detector also has circuit and simply reaches control advantage such as easy.
Description of drawings
Fig. 1 is a kind of line-type heat detector structural representation of prior art.
Fig. 2 is the line-type heat detector structural representation of another kind of prior art.
Fig. 3 is a line-type heat detector structural representation provided by the invention.
Embodiment
Below in conjunction with drawings and the specific embodiments line-type heat detector provided by the invention is elaborated.The parts identical with prior art adopt identical drawing reference numeral, and omit its detailed description of carrying out.
As shown in Figure 3, line-type heat detector provided by the invention comprises linear temperature sensor 1; Be connected an end of linear temperature sensor 1, can be in real time the warning electrical quantity of linear temperature sensor 1 be detected, and when the electrical quantity that detects surpasses setting value, send the boxcar 2 of fire alarm signal; With the other end that is connected linear temperature sensor 1, has the terminal resistance 3 of the supervision effect of opening circuit; Wherein linear temperature sensor 1 comprises detecting conductor 4,5 and parallel sensitive characteristic (NTC, PTC or CTR characteristic) the material barrier layer 6 that is arranged between the detecting conductor 4,5 that two parallel (coaxial, stranded or parallel) are provided with; Described line-type heat detector also comprises and being attempted by between 2 two signal input terminals of boxcar, and a normal open switch 8 and a resistor 9 of being serially connected mutually.
The resistance of described resistor 9 equates with the resistance of terminal resistance 3 or is unequal.
When the resistance of described resistor 9 equated with the resistance of terminal resistance 3, the alarming threshold value of fire detector did not need to adjust.
When the resistance of the resistance of described resistor 9 and terminal resistance 3 was unequal, the alarming threshold value of fire detector needed correspondingly to adjust.
Under normal circumstances, normal open switch 8 is in off-state, so resistor 9 is inoperative.After going offline appears in terminal resistance 3, boxcar 2 will be controlled normal open switch 8 closures, thereby resistor 9 is incorporated in the linear temperature sensor 1, and boxcar 2 still can carry out fire alarm according to the electrical quantity of linear temperature sensor 1 like this.In case after the fault of terminal resistance 3 is eliminated, can artificially or automatically normal open switch 8 be disconnected, thereby make this fire detector recover normal.
Claims (3)
1. line-type heat detector, it comprises linear temperature sensor (1); Be connected an end of linear temperature sensor (1), can be in real time the warning electrical quantity of linear temperature sensor (1) be detected, and when the electrical quantity that detects surpasses setting value, send the boxcar (2) of fire alarm signal; With the other end that is connected linear temperature sensor (1), has the terminal resistance (3) of the supervision effect of opening circuit; Wherein linear temperature sensor (1) comprises two parallel detecting conductors (4,5) that are provided with and the parallel sensitive characteristic material barrier layer (6) that is arranged between the detecting conductor (4,5); It is characterized in that: described line-type heat detector also comprises and being attempted by between (2) two signal input terminals of boxcar, and a normal open switch (8) that is serially connected mutually and a resistor (9).
2. line-type heat detector according to claim 1 is characterized in that: the resistance of described resistor (9) equates with the resistance of terminal resistance (3).
3. line-type heat detector according to claim 1 is characterized in that: the resistance of the resistance of described resistor (9) and terminal resistance (3) is unequal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200999711U CN201084248Y (en) | 2007-10-17 | 2007-10-17 | A linear-type temperature sensing fire detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200999711U CN201084248Y (en) | 2007-10-17 | 2007-10-17 | A linear-type temperature sensing fire detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201084248Y true CN201084248Y (en) | 2008-07-09 |
Family
ID=39626720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200999711U Expired - Lifetime CN201084248Y (en) | 2007-10-17 | 2007-10-17 | A linear-type temperature sensing fire detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201084248Y (en) |
-
2007
- 2007-10-17 CN CNU2007200999711U patent/CN201084248Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071017 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |