CN101650865A - Linear temperature sensing fire detector with point-shaped temperature sensing element and alarm method thereof - Google Patents
Linear temperature sensing fire detector with point-shaped temperature sensing element and alarm method thereof Download PDFInfo
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- CN101650865A CN101650865A CN200910070364A CN200910070364A CN101650865A CN 101650865 A CN101650865 A CN 101650865A CN 200910070364 A CN200910070364 A CN 200910070364A CN 200910070364 A CN200910070364 A CN 200910070364A CN 101650865 A CN101650865 A CN 101650865A
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Abstract
The invention relates to a linear temperature sensing fire detector with a point-shaped temperature sensing element and an alarm method thereof. The fire detector comprises a linear temperature sensing element, a converting box, a terminal resistor and a point-shaped temperature sensing element, wherein the point-shaped temperature sensing element is installed at the position of a cable joint andconnected with the converting box by two conductors. The linear temperature sensing fire detector and the alarm method adds the point-shaped temperature sensing element installed at the position of the cable joint on the linear temperature sensing fire detector in the prior art, and the electric parameters of the linear and point-shaped temperature sensing elements are alternately detected by theconverting box; once the cable joint position generates abnormal high temperature, the point-shaped temperature sensing element can transfer a sensing signal to the converting box immediately; accordingly, even if the temperature of the linear temperature sensing element does not reach an alarm threshold value, the converting box can also decide whether a fire alarm signal is transmitted or not according to the condition of the point-shaped temperature sensing element, and a detecting blind area can be eliminated, thereby improving the alarm reliability and the sensitivity of the fire detector.
Description
Technical field
The present invention relates to a kind of line-type heat detector and alarm method, particularly relate to a kind of line-type heat detector and alarm method that has the point-shaped temperature induction element.
Background technology
Line-type heat detector is a kind of broad-spectrum fire detector, its mainly by linear temperature sensor with NTC characteristic, be connected an end of linear temperature sensor, can be in real time the temperature or the warning electrical quantity (or sampled value) of linear temperature sensor be detected, and send the boxcar of fire alarm signal and be connected the other end of linear temperature sensor according to the size of temperature or warning electrical quantity (or sampled value), the terminal resistance that linear temperature sensor is worked the supervision effect of opening circuit constitutes.Linear temperature sensor at present commonly used comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC (negative temperature coefficient) characteristic barrier layers between the detecting conductor, or two parallel detecting conductors that are provided with and parallelly be arranged on two NTC characteristic barrier layer and fused insulating layers between the detecting conductor.Structural representation when Fig. 1 is laid on cable testing bridge or the cable pallet for the line-type heat detector of prior art with the form of sine wave.The structural representation when line-type heat detector that Fig. 2 has a place of coincidence for linear temperature sensor on shown in Fig. 1 its and cable splice is laid on cable testing bridge or the cable pallet.Fig. 3 is linear temperature sensor on shown in Fig. 1 its and cable splice structural representation when the line-type heat detector at the place of coincidence is not laid on cable testing bridge or the cable pallet.As shown in Figure 1, linear temperature sensor 1 on the line-type heat detector of this prior art is that the form with sine wave is laid on the cable testing bridge or cable pallet A2 that is equipped with power cable A1, is connected to the boxcar 2 at linear temperature sensor 1 two ends and terminal resistance 3 and then is arranged on cable testing bridge or cable pallet A2 one side or near the body of wall.But, there is following point in the line-type heat detector of above-mentioned this prior art: as Fig. 2, shown in Figure 3, be laid on a certain cable splice B that may have the problem of being prone among the power cable A1 on cable testing bridge or the cable pallet A2, this cable splice B might coincide with certain of linear temperature sensor 1, also may not coincide with linear temperature sensor 1 fully.In the previous case, the Normal Alarm temperature of supposing line-type heat detector is 85 ℃, if abnormal high temperature appears in cable splice B place, because the contact area of linear temperature sensor 1 and cable splice B is limited, therefore the heat on the cable splice B can not promptly pass to linear temperature sensor 1, so just can't detecting the temperature or the warning electrical quantity of linear temperature sensor 1, boxcar 2 changes, line-type heat detector just can not normally be reported a fire in the time of 85 ℃ like this, just can report a fire when the temperature at cable splice B place reaches 120 ℃ by the time and have only, so just might incur loss through delay time of fire alarming, thereby cause occurring the fire failure that causes because of cable splice B; And under latter event, because linear temperature sensor 1 and cable splice B do not contact, therefore the heat on the cable splice B just can't in time pass to linear temperature sensor 1, so also just can't detecting the temperature or the warning electrical quantity of linear temperature sensor 1, boxcar 2 changes, line-type heat detector just can not Normal Alarm in the time of 85 ℃ like this, even can not report a fire when the temperature at cable splice B place reaches 120 ℃, the fire failure that the blast because of cable splice B causes so just might occur, thereby cause serious casualties or equipment loss.Therefore, the line-type heat detector of this prior art can't detect the temperature at cable splice B place, promptly exists and detects the blind area, and the warning reliability of line-type heat detector and sensitivity are descended.
Summary of the invention
In order to address the above problem, to the object of the present invention is to provide a kind of can the elimination to detect the blind area, thereby can improve the line-type heat detector that has the point-shaped temperature induction element and the alarm method of warning reliability and sensitivity.
In order to achieve the above object, the line-type heat detector that has the point-shaped temperature induction element provided by the invention comprises linear temperature sensor and is connected to the boxcar at linear temperature sensor two ends and works the terminal resistance of the supervision effect of opening circuit; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC characteristic barrier layers between the detecting conductor; The described line-type heat detector that has the point-shaped temperature induction element also comprises and is installed in the cable splice place, and by two point-shaped temperature induction elements that conductor links to each other with boxcar, boxcar detects the temperature or the warning electrical quantity of linear temperature sensor and point-shaped temperature induction element in real time.
The line-type heat detector that has the point-shaped temperature induction element provided by the invention comprises linear temperature sensor and is connected to the boxcar and the terminal resistance that works the supervision effect of opening circuit at linear temperature sensor two ends; Wherein linear temperature sensor comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC characteristic barrier layer and fused insulating layers between the detecting conductor, and in two detecting conductors at least one be elastic conductor or memory alloy wire; The described line-type heat detector that has the point-shaped temperature induction element also comprises and is installed in the cable splice place, and by two point-shaped temperature induction elements that conductor links to each other with boxcar, boxcar detects the temperature or the warning electrical quantity of linear temperature sensor and point-shaped temperature induction element in real time.
Described point-shaped temperature induction element is a kind of in thermistor, the thermoelectric occasionally thermoswitch.
One on the described linear temperature sensor in two detecting conductors is adopted the thermocouple wire material to make, constitutes interim thermopair with another root.
The alarm method that has the line-type heat detector of point-shaped temperature induction element provided by the invention comprises the following step that carries out in order:
1) boxcar replaces the resistance value of check point type temperature sensing element and linear temperature sensor;
2) when boxcar detected in the resistance value of the resistance value of linear temperature sensor or point-shaped temperature induction element any and surpasses separately corresponding alarm threshold value, boxcar sent fire alarm signal immediately.
Line-type heat detector and the alarm method that has the point-shaped temperature induction element provided by the invention is to have increased a point-shaped temperature induction element that is installed in the cable splice place on the line-type heat detector of prior art, and utilize boxcar alternately the electrical quantity of line style and point-shaped temperature induction element to be detected, in case abnormal high temperature appears in the cable splice place like this, the point-shaped temperature induction element can pass to boxcar with the signal of responding to immediately, even therefore the temperature of linear temperature sensor does not reach its alarming threshold value, whether boxcar also can send fire alarm signal according to the situation decision of point-shaped temperature induction element, so just can eliminate and detect blind area, the warning reliability and the sensitivity that can improve fire detector thus.
Description of drawings
Structural representation when Fig. 1 is laid on cable testing bridge or the cable pallet for the line-type heat detector of prior art with the form of sine wave.
The structural representation when line-type heat detector that Fig. 2 has a place of coincidence for linear temperature sensor on shown in Fig. 1 its and cable splice is laid on cable testing bridge or the cable pallet.
Fig. 3 is linear temperature sensor on shown in Fig. 1 its and cable splice structural representation when the line-type heat detector at the place of coincidence is not laid on cable testing bridge or the cable pallet.
Structural representation when Fig. 4 is laid on cable testing bridge or the cable pallet for the line-type heat detector that has a point-shaped temperature induction element provided by the invention with the form of sine wave.
Embodiment
Below in conjunction with drawings and the specific embodiments line-type heat detector and the alarm method that has the point-shaped temperature induction element 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.
Embodiment 1:
As shown in Figure 4, the line-type heat detector that has the point-shaped temperature induction element that present embodiment provides comprises linear temperature sensor 1 and is connected to the boxcar 2 and the terminal resistance 3 that works the supervision effect of opening circuit at linear temperature sensor 1 two ends; Wherein linear temperature sensor 1 comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC characteristic barrier layers between the detecting conductor; The described line-type heat detector that has the point-shaped temperature induction element also comprises and is installed in cable splice B place, and by two point-shaped temperature induction elements 7 that conductor 8 links to each other with boxcar 2, boxcar 2 detects the temperature or the warning electrical quantity (or sampled value) of linear temperature sensor 1 and point-shaped temperature induction element 7 in real time.
In addition, cable splice B of every existence just is provided with a point-shaped temperature induction element 7 at this place, and links to each other with boxcar 2 by two conductors 8.
Utilize the above-mentioned alarm method that has the line-type heat detector of point-shaped temperature induction element to comprise the following step that carries out in order:
1) boxcar 2 replaces the resistance value of check point type temperature sensing element 7 and linear temperature sensor 1;
2) when boxcar 2 detected in the resistance value of the resistance value of linear temperature sensor 1 or point-shaped temperature induction element 7 any and surpasses separately corresponding alarm threshold value, boxcar 2 sent fire alarm signal immediately.
Embodiment 2:
As shown in Figure 4, the line-type heat detector that has the point-shaped temperature induction element that present embodiment provides comprises linear temperature sensor 1 and is connected to the boxcar 2 and the terminal resistance 3 that works the supervision effect of opening circuit at linear temperature sensor 1 two ends; Wherein linear temperature sensor 1 comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC characteristic barrier layer and fused insulating layers between the detecting conductor, and in two detecting conductors at least one be elastic conductor or memory alloy wire; The described line-type heat detector that has the point-shaped temperature induction element also comprises and is installed in cable splice B place, and by two point-shaped temperature induction elements 7 that conductor 8 links to each other with boxcar 2, boxcar 2 detects the temperature or the warning electrical quantity (or sampled value) of linear temperature sensor 1 and point-shaped temperature induction element 7 in real time.The line-type heat detector that has the point-shaped temperature induction element that present embodiment provides is except that the structure of linear temperature sensor 1 is different with a last embodiment, and other structure and warning principle of work are identical with a last embodiment.
Embodiment 3:
Present embodiment is to adopt the thermocouple wire material to make with one in two detecting conductors on the linear temperature sensor 1 among embodiment 1 and the embodiment 2, constitute interim thermopair with another root, thereby form the linear temperature sensor with thermocouple characteristic, other structure and principle of work are then identical with above-mentioned two embodiment.
Described point-shaped temperature induction element 7 is a kind of in thermistor, the thermoelectric occasionally thermoswitch.
Claims (7)
1, a kind of line-type heat detector that has the point-shaped temperature induction element, the terminal resistance (3) that it comprises linear temperature sensor (1) and is connected to the boxcar (2) at linear temperature sensor (1) two ends and works the supervision effect of opening circuit; Wherein linear temperature sensor (1) comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC characteristic barrier layers between the detecting conductor; It is characterized in that: the described line-type heat detector that has the point-shaped temperature induction element also comprises and is installed in cable splice B place, and by the point-shaped temperature induction element (7) that two conductors (8) link to each other with boxcar (2), boxcar (2) detects the temperature or the warning electrical quantity of linear temperature sensor (1) and point-shaped temperature induction element (7) in real time.
2, the line-type heat detector that has the point-shaped temperature induction element according to claim 1 is characterized in that: described point-shaped temperature induction element (7) is a kind of in thermistor, the thermoelectric occasionally thermoswitch.
3, the line-type heat detector that has the point-shaped temperature induction element according to claim 1, it is characterized in that: one in last two detecting conductors of described linear temperature sensor (1) is adopted the thermocouple wire material to make, constitutes interim thermopair with another root.
4, a kind of line-type heat detector that has the point-shaped temperature induction element, the terminal resistance (3) that it comprises linear temperature sensor (1) and is connected to the boxcar (2) at linear temperature sensor (1) two ends and works the supervision effect of opening circuit; Wherein linear temperature sensor (1) comprises two parallel detecting conductors that are provided with and parallelly is arranged on two NTC characteristic barrier layer and fused insulating layers between the detecting conductor, and in two detecting conductors at least one be elastic conductor or memory alloy wire; It is characterized in that: the described line-type heat detector that has the point-shaped temperature induction element also comprises and is installed in cable splice B place, and by the point-shaped temperature induction element (7) that two conductors (8) link to each other with boxcar (2), boxcar (2) detects the temperature or the warning electrical quantity of linear temperature sensor (1) and point-shaped temperature induction element (7) in real time.
5, the line-type heat detector that has the point-shaped temperature induction element according to claim 4 is characterized in that: described point-shaped temperature induction element (7) is a kind of in thermistor, the thermoelectric occasionally thermoswitch.
6, the line-type heat detector that has the point-shaped temperature induction element according to claim 4, it is characterized in that: one in last two detecting conductors of described linear temperature sensor (1) is adopted the thermocouple wire material to make, constitutes interim thermopair with another root.
7, a kind of claim 1 or 4 described alarm methods that have the line-type heat detector of point-shaped temperature induction element of utilizing, it is characterized in that: described alarm method comprises the following step that carries out in order:
1) boxcar (2) replaces the resistance value of check point type temperature sensing element (7) and linear temperature sensor (1);
2) when boxcar (2) detected in the resistance value of the resistance value of linear temperature sensor (1) or point-shaped temperature induction element (7) any and surpasses separately corresponding alarm threshold value, boxcar (2) sent fire alarm signal immediately.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070364A CN101650865A (en) | 2009-09-07 | 2009-09-07 | Linear temperature sensing fire detector with point-shaped temperature sensing element and alarm method thereof |
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| CN200910070364A CN101650865A (en) | 2009-09-07 | 2009-09-07 | Linear temperature sensing fire detector with point-shaped temperature sensing element and alarm method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105303752A (en) * | 2015-11-03 | 2016-02-03 | 河南瑞远物联网科技有限公司 | Electrical fire monitoring and early warning system based on point type temperature sensing elements |
| CN105509809A (en) * | 2015-12-20 | 2016-04-20 | 成都霍睦斯电气有限公司 | Temperature transmitter with detection function |
| CN106056825A (en) * | 2016-06-14 | 2016-10-26 | 北京小米移动软件有限公司 | Fire alarm method, device and system and household fan device |
-
2009
- 2009-09-07 CN CN200910070364A patent/CN101650865A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105303752A (en) * | 2015-11-03 | 2016-02-03 | 河南瑞远物联网科技有限公司 | Electrical fire monitoring and early warning system based on point type temperature sensing elements |
| CN105509809A (en) * | 2015-12-20 | 2016-04-20 | 成都霍睦斯电气有限公司 | Temperature transmitter with detection function |
| CN106056825A (en) * | 2016-06-14 | 2016-10-26 | 北京小米移动软件有限公司 | Fire alarm method, device and system and household fan device |
| CN106056825B (en) * | 2016-06-14 | 2018-07-31 | 北京小米移动软件有限公司 | Fire alarm method, device, domestic fan apparatus and system |
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Open date: 20100217 |