CN1047154A - Increasing temperature warning device - Google Patents
Increasing temperature warning device Download PDFInfo
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- CN1047154A CN1047154A CN 89103249 CN89103249A CN1047154A CN 1047154 A CN1047154 A CN 1047154A CN 89103249 CN89103249 CN 89103249 CN 89103249 A CN89103249 A CN 89103249A CN 1047154 A CN1047154 A CN 1047154A
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Abstract
The invention provides a kind of increasing temperature warning device of protecting object to avoid high temperature or fire hazard, comprise and a reference voltage source and the controllable silicon that connects.Sound equipment or visible light warning device and this controllable silicon serial connection; when the controllable silicon temperature surpasses a particular value; the controllable silicon conducting; the warning device action; a diode and a resistance serial connection back are connected in parallel with the silicon controlled control utmost point; and making reference voltage become the function of the environment temperature of protected device, a diode that is connected in series with controllable silicon is powered to increasing temperature warning device by AC power and two micro-fuses, makes warning device avoid overcurrent.
Description
The present invention relates to a temperature-sensitive device, relate in particular to a kind of like this device, when a controllable silicon in this device detected object temperature near temperature-sensitive device and rises, this sensor was just warned.
There have been a lot of devices to be applied in the relevant electric safety device field, as fuse, circuit breaker and loop protection device; when producing big electric current in a main electric wiring, it works; equally, a lot of smoke detectors are arranged, in case the sound that just can give a warning when producing flue dust.The present invention includes a little and inexpensive semiconductor circuit, it can be placed on an object, as an electric switch, and socket or plug next door.When this element branch now heats up, the present invention just warns, thereby real or other dangerous being avoided of feasible fire.
In existing technology, just use the high-temperature impedance factor of some semiconductor materials, thereby produced the switchgear that depends on temperature.For example be presented to the United States Patent (USP) 3,343,004 that is entitled as " thermo-responsive control system " of Ao Weixinsiji, disclosed a current control device that comprises a responsive to temperature semiconductor element that is connected in series with pull-up resistor on September 19th, 1967.When the temperature rising occurring, the blocked resistance value of semiconductor element descends, and makes electric current flow in the loop.
Equally, the give a warning system of sound of the rising of having reported temperature is arranged in the prior art.Wherein representational example comprises, the United States Patent (USP) 4 that October 29, the exercise question with " fire detection system " was presented to Ji Mula in 1985,550,313, it discloses a general circuit, when the output of a sensor surpasses reference voltage, this circuit utilizes a comparer to send a caution signal, the United States Patent (USP) that is entitled as " fire detector " 4 that is presented to Ji Mula on August 27th, 1985,538,137 have disclosed a kind of circuit, in this circuit, the output voltage of sensor triggers a voltage stabilizing diode and a controllable silicon that changes frequency successively, capacitor discharge this moment.
Be presented to Denis's United States Patent (USP) 4 with the exercise question of " chimney fire fire detector " in February 9 nineteen eighty-two, 315,256, it has disclosed a temperature sensing circuit, wherein sensor comprises a pair of lead of linking the silicon controlled insulation winding that is connected in series with an alarm, the insulation of lead has been melted in the rising of temperature, make lead contact, thereby connected circuit, is the United States Patent (USP) 3 that exercise question is presented to people such as Miyamoto on April 17th, 1973 with " utilizing the positive pole of pairing and the temperature buzzer of negative pole coefficient resistance ", 728,702, it has disclosed and has utilized the thermistor that is connected in series and produce a signal that makes Schmidt circuit work.
Prior art does not disclose any circuit of making early warning can dangerous temperature occur in an object element time.
Therefore, an object of the present invention is to provide a kind of easy, inexpensive increasing temperature warning device of before fire takes place, warning.
Another object of the present invention provides a kind of increasing temperature warning device that can be applied on the various objects.
A further object of the present invention provides a kind of device, and it can easily proofread and correct the normal working temperature of adhering to object with compensation.
Briefly, a preferred embodiment of the present invention comprises a controllable silicon that is connected in series with the warning element, one first resistance, one first diode rectifier and a pair of thin-line-shaped safety element.Controllable silicon plays the effect of thermal sensor and switch, and it puts to such an extent that abut against and want protected object (as an electric switch, socket mouth, plug or circuit-breaker).The second and the 3rd resistance is in parallel with controllable silicon, so that a reference voltage to be provided, when the silicon controlled temperature surpasses a fixed value with respect to environment temperature, the silicon controlled starting voltage will drop to below the reference voltage, make electric current flow through the warning element and first resistance, thereby triggered the warning element.Particularly, connect the common working temperature height of the rising of silicon controlled temperature, but specific energy causes that the temperature of fire is low than protected object.So, before fire takes place, just warned.
Second diode and the 4th resistance and the 3rd resistance are in parallel so that play the effect of the reference voltage of environment temperature.The first thin wire safety element is placed between the end and controllable silicon of power supply.To prevent the internal short-circuit danger of increasing temperature warning device, same, second thin wire is placed between the other end and controllable silicon of power supply as fuse.
An advantage of the present invention is that this increasing temperature warning device takes place to start owing to heating up with regard to preceding energy at fire.
Another advantage of the present invention is that the simple and size of this device makes it to be attached on various objects.
Another advantage of the present invention is that it is cheap for manufacturing cost.
An advantage more of the present invention is that this device is can be easily accurate and compensate to the common operating temperature of object attached to it.
These and other purpose of the present invention and advantage will be indubitable and conspicuous the one of ordinary skilled in the art to those after the detail specifications of having read the preferred embodiments that is described in conjunction with the accompanying drawings.
Fig. 1 is the electrical schematic diagram according to an increasing temperature warning device of the present invention;
Fig. 2 is the temperature variant curve map of some element voltages in the circuit shown in Figure 1;
Fig. 3 A is the front view of 120 volts of AC outlet of standard;
Fig. 3 B is the rear view of Fig. 3 A socket, and the increasing temperature warning device of socket is linked in expression;
Fig. 4 is first kind of circuit block diagram that changes example of the present invention;
Fig. 5 is second kind of circuit block diagram that changes example of the present invention;
Fig. 1 is electrical schematic diagrams forming increasing temperature warning device of the present invention by reference number 10 expressions.Device 10 comprises a sensor 14, and it is placed on and nestles up protected object 18 places, and as an electric switch, socket, output terminal, plug or circuit-breaker, these do not belong to part of the present invention.Generally, other element of sensor 14 and device 10 separates a distance ' ' d ' ', under normal circumstances, object 18 is under normal temperature or the environment temperature, a warning element 20, a coupling components 21, a resistance 24, a diode 26 and a fuse 28 are serially connected between the end 31 of a sensor 14 and a power supply 32, in preferred embodiment, sensor 14 comprises a rectifier that contains the controllable silicon 34 semiconductors control of an anode 38, the one control utmost points 40 and a negative electrode 42.Warning element 20 can be any alarm features, sound part for example, and just as loudspeaker, buzzer and warning horn, or a kind of display unit, as flashlamp.In addition, several different warning elements can be connected in series mutually so that produce several caution signals simultaneously, and power supply 32 is not a part of the present invention, and it is 110 volts of AC power normally.Fuse 43 is serially connected between the other end 44 of negative electrode 42 and power supply 32.Fuse 28 and 43 can be an one metal wire, and it just blows when the electric current that flows through device 10 is excessive.Coupling components 21 can be a relay coil or optics connector, and it is an optional feature of the present invention.
Fig. 2 represents to vary with temperature the voltage response curves figure of each circuit component in device 10, straight line 74 representatives vary with temperature the threshold voltage variations of controllable silicon 34, straight line 76 representatives are with the forward voltage drop of temperature rising diode 64 under a setting current value, and dot-and-dash line 78 is variations of line 76 when resistance 66 and diode 65 serial connections.Resistance 50 and 52 family curve are horizontal lines 80, and curve 82 flows through the electric current of diode 64 and the relation of diode forward pressure drop when being illustrated in a design temperature.Put the intersection of P online 74 and 80, fixed temperature T
1It is temperature corresponding to the P place.Line 74 and 76 is parallel (identical slope is promptly arranged), therefore, all equates with line 74 and 76 many temperature difference Δ Ts that record when different magnitude of voltage.On the contrary, line 74 and 76 is uneven, and online 74 and 76 many temperature difference Δ Ts that record are unequal when different magnitude of voltage so.
Fig. 3 A represents a reference power supply socket 84, as one 110 volts or 220 volts of sockets.A pair of supply terminals 86(only draws one) be placed on a side of supply socket 84, electric power incoming line device as socket 84, Fig. 3 B represents the typical usage of increasing temperature warning device 10, and in Fig. 3 B, device 10 is installed to the rear side of the drawn socket of Fig. 3 A 84.Therefore, socket 84 is equal to the object 18 shown in Fig. 1, and lead 68 and 70 is linked in the supply terminals 86 respectively, gets the power supply of auto levelizer 10 thus.Device 10 maximum element is a warning element 20, and promptly the diameter shown in Fig. 3 B is D, highly is the cylindrical buzzer 87 of h.Generally, diameter D is approximately 1 inch, and height h is about 2/10ths inches (0.2 inches).One outshot 88 is outstanding and be arranged near the terminal of terminals 86 from buzzer 87, and other element of device 10 can be placed on the inside of buzzer 87 shells easily.The shell of buzzer 87 plays non-flammable case 73.
Fig. 4 is an another embodiment of the present invention, and its expression is by a high temperature warning device of reference number 90 representatives.The element of the device 90 identical with device 10 element is by same numeric character but add " ' " and represent.
Thermistor 92 has replaced installing 10 resistance 52 in device 90.In this structure, thermistor 92 is a thermal sensor, resistance 92 will be placed on protected object 18 ' near.Lead 93 with resistance 92 link node 54 ', lead 94 with resistance 92 link node 48 '.Switch 95 replaces the sensor 14 of device 10.Switch 95 can be a controllable silicon 34, or it can be that different circuit component is as a controllable silicon or pair of transistor.
Fig. 5 is another variation example of the present invention, and its expression is by the increasing temperature warning device of a plurality of sensors of reference number 96 representatives.The device 96 with the device 10 components identical by the same numbers symbol but add " " " represent.
In Fig. 5, a plurality of sensors 14 " are connected in parallel to replace single-sensor shown in Figure 1 14.As " when comprising a controllable silicon, a plurality of control utmost points 40 " are linked lead 56 " when sensor 14.
Referring to Fig. 1, the action description of device 10 is as follows.Diode 26 will become half-wave voltage and feedway 10 from the alternating current of power supply 32. Resistance 50 and 52 is as voltage distribution reference power supply 49.(annotate: resistance 50 and 52 can be replaced by any suitable voltage distribution standard apparatus, for example with a semiconductor element as be connected in series one resistance of a diode.) device 10 places that need temperature control that are positioned near protected object 18.The d that adjusts the distance selects, and environmental criteria temperature source 62 remains on the environment temperature in the time of reacting the temperature of object 18 with convenient sensor 14.If like this, increase lead 71 and 72 and the length of the control utmost point 40 leads, so that sensor is placed on the outside of shell 73, the special place that need carry out temperature control.Under the situation of normally being heated, because node 48 and 54 s' voltage is lower than the starting voltage of controllable silicon 34, electric current can flows through sensor 14.Yet when the temperature of protected object 18 and sensor 14 raise, the starting voltage of controllable silicon 34 had reduced, and when it drops to when being lower than resistance 52 two ends reference voltages, electric current is with flows through sensor 14, and it just makes 20 actions of warning element.When 20 actions of warning element, resistance 24 restriction electric currents.When the component value of selecting arrangement 10, these values are selected to such an extent that be enough to make the rising of the temperature of warning element 20 actions than causing that the temperature that protected object 18 or the structure that links to each other with it are caught fire is low.Therefore, warning element 20 action before fire takes place.
Utilization comprises the environment temperature reference source 62 of diode 64 and resistance 66, makes the coefficient of the reference voltage at resistance 50 and 52 two ends as the environment temperature of protected object 18.In other words, utilize environment temperature reference source 62 to make device 10 when the temperature of object 18 surpasses environment temperature uniform temperature difference, warn.With the change in resistance of resistance 52, the value of temperature T as shown in Figure 2 also changes.This just provides the method for the environment temperature that setting device 10 allowed.The resistance of resistance 52 is low more, and the environment temperature that does not make 20 actions of warning element again that is allowed by device 10 is just high more.Should be noted that environment temperature reference source 62 can be installed in 10 and be removed, the result warns element 20 to move under a fixed temperature of being set by resistance 52.
Fig. 2 has further described the effect of various circuit components in device 10.Horizontal line 80 representatives are by resistance 50 and the 52 fixed reference voltages of determining.Reference voltage is not subjected to influence of temperature change, as long as the reference voltage at resistance 52 two ends is littler than the threshold voltage of controllable silicon 34, warning element 20 just can not move.Otherwise, the temperature variant situation of starting voltage of straight line 74 expression controllable silicons 34.For standard semiconductor, this variation is 2.5mv/ ℃.Represented as line 76; diode 64 temperature variant family curves and controllable silicon 34 are about the same; therefore; line 74 and 76 be result parallel, that line 74 is parallel with 76 be when temperature when the environment temperature of protected object 18 or normal temperature rise to fixed value Δ Ts, warning element 20 will move.Line 78 expressions comprise that the environment temperature reference source 62 of diode 64 and resistance 66 is used in the situation among Fig. 1.Line 74 and 78 is not parallel, therefore warns element will move when non-constant temperature rising Δ Tx occurring.The slope of line 78 can change by the resistance that changes resistance 66.So, the value of regulating resistance 66, warning element 20 can be set in by temperature increments different more than the resistance 52 determined environment temperatures and start down, therefore, device 10 can describe first in these three kinds of situations, as environment temperature reference source 62 need not, one surpasses fixed temperature T
1, device 10 just produces a caution signal.The second, comprise diode 64 as environment temperature reference source 62 but do not comprise resistance 66 that device 10 produces a caution signal during a constant temperature difference Ts on the environment temperature of object 18.The 3rd, when environment temperature reference source 62 comprise diode 64 and resistance 66 both the time, device 10 just produces caution signal during a variable temperature difference Tx on the environment temperature of object 18.
In Fig. 1, not flammable shell 73 encased except that stretching out from shell 73 in case with part lead 68 and 70 that power supply 32 links to each other all circuit components of device 10.The d that adjusts the distance selects other circuit component with convenient device, and when especially environment temperature reference source 62 remains on the environment of device 10, sensor 14 will detect the temperature rise in object 18 interior selected positions.Comprise undesirable heat conductor such as plastics as shell 73, then just can be little to several millimeters apart from d.Install then 10 and sensor 14 just be placed near the object 18 that maybe will carry out temperature control the object 18 certain a bit near.Raise as temperature on object 18, occurring, just detect the rising of this temperature by sensor 14.Because sensor 14 and 62 standoff distance d of reference source and shell 73 are poor conductors, can survey this temperature at environment temperature reference source 62 places and raise.In addition, by increase lead 71 and 72 and the length of the control utmost point 40 leads sensor 14 can be put into shell 73 outsides, be put into protected object 18 near.Warning element 20 also can be put into the outside of shell 73 so that warning element 20 is observed.
In some applications, when detecting dangerous situation, wish that use device 10 automatically cuts off protected device 18.This can finish by go to open a switch (not drawing among the figure) that can cut off protected object 18 with Connection Element 21.When in device 10, having electric current, 20 actions of warning element, Connection Element 21 also moves.
In Fig. 3 A and 3 B, socket 84 is 110 volts of standards or 220 volts of AC Power supply socket.When abnormal heat occurring in socket, just starting of warning device 10 sends warning signal before fire takes place.Sensor 14 is placed on the inside of outshot 88 and sees Fig. 1 to increase environment temperature reference source 62 and sensor 14 spacing d().Outshot 88 be placed on socket 84 the insides that need temperature control supply terminals 86 near.Following any situation all can cause abnormal heat in terminals 86, as in socket 84, not connecting, have excessive electric current, or short circuit etc.Device other setting of 10 comprises and being placed near AC Power supply socket, isolating switch, at the wheel shaft that wheel equipment such as train or automobile are arranged, or near other element that the abnormal temperature situation may occur.
Limit when above in the maximum temperature of semiconductor element when temperature, adopt device 90 as shown in Figure 4, in this figure, the length by increasing lead 93 and 94 thermistor 92 is placed on shell 73 outside, object 18 near.Therefore, have only resistance 92 is exposed in the abnormal temperature zone, the semiconductor element of switch 95 just exempts from destruction.When temperature raise, thermistor 92 resistances increased, and when resistance 92 both end voltage surpassed the starting voltage of voltage cut-out 95, electric current just flow through switch 95 and warning element 20 is started.
Though invention has been described according to preferred embodiment, it will be appreciated that, should not be confined in the described context.Undoubtedly, those one skilled in the art will carry out various changes and improvements to it after reading above-mentioned described content.Therefore, our intention is: attached claim should be believed to comprise all and belong to the content of the changes and improvements of essential scope of the present invention.
Claims (23)
1, a kind of increasing temperature warning device comprises:
First device that detecting temperature changes,
The usefulness that gives a warning and and the warning device that links to each other of first device of detecting temperature variation, when measuring the predetermined value temperature variation, the indication that just gives a warning of this warning device; And
Link to each other with first device that detecting temperature changes, and a voltage distribution standard apparatus corresponding to the reference voltage of described predetermined value can be provided.
2, increasing temperature warning device as claimed in claim 1 is characterized in that: warning device comprises an acoustic signal emitter.
3, increasing temperature warning device as claimed in claim 1 is characterized in that: warning device comprises a visible signal emitter.
4, increasing temperature warning device as claimed in claim 1 is characterized in that: the voltage distribution standard apparatus comprises two resistance at least.
5, increasing temperature warning device as claimed in claim 1 is characterized in that: the voltage distribution standard apparatus comprises a resistance that is connected in series with semiconductor element.
6, increasing temperature warning device as claimed in claim 5 is characterized in that: semiconductor element comprises a diode.
7, increasing temperature warning device as claimed in claim 1 is characterized in that: first device that detecting temperature changes comprises a controllable silicon.
8, increasing temperature warning device as claimed in claim 1 is characterized in that: the voltage distribution standard apparatus comprises a temperature-sensing element (device), so that reference voltage is a function of environment temperature.
9, increasing temperature warning device as claimed in claim 8 is characterized in that: temperature-sensing element (device) comprises a diode.
10, increasing temperature warning device as claimed in claim 9 is characterized in that: also comprise the resistance that at least one is connected in series with this diode.
11, increasing temperature warning device as claimed in claim 1 is characterized in that: it also comprises a kind of device of the half-wave voltage pulse being supplied with the device of detecting temperature variation.
12, increasing temperature warning device as claimed in claim 11 is characterized in that: provide the device of half-wave voltage pulse to comprise a diode rectifier.
13, increasing temperature warning device as claimed in claim 1 is characterized in that: also comprise and a kind ofly protect described warning device to make it the device of avoiding overcurrent to flow through.
14, increasing temperature warning device as claimed in claim 13 is characterized in that: the device of protecting described warning device to avoid super-high-current to flow through comprises a thin wire with the device serial connection that produces warning at least.
15, increasing temperature warning device as claimed in claim 1 is characterized in that: second device that also comprises the detecting temperature variation that first device that changes with detecting temperature is connected in parallel.
16, increasing temperature warning device as claimed in claim 15 is characterized in that: second device that detecting temperature changes comprises a controllable silicon.
17, increasing temperature warning device as claimed in claim 1 is characterized in that: comprise that also one makes warning device and avoids the device that protected object is coupled that high temperature damages.
18, increasing temperature warning device as claimed in claim 17 is characterized in that: coupling device comprises an optical coupling element with the device serial connection that produces warning.
19, increasing temperature warning device as claimed in claim 17 is characterized in that: coupling device comprises a relay coil with the device serial connection that produces warning.
20, a kind of increasing temperature warning device comprises:
The thermistor that detecting temperature changes;
A contact maker in parallel with this thermistor;
The warning device of a generation warning that is connected in series with contact maker;
The resistance that at least one is connected in series with thermistor; And
Electric current flows through this switchgear when the temperature of resistance surpasses certain value.
21, increasing temperature warning device as claimed in claim 20 is characterized in that: this contact maker comprises a controllable silicon.
22, increasing temperature warning device as claimed in claim 20 is characterized in that: this contact maker comprises at least one transistor.
23, increasing temperature warning device as claimed in claim 20 is characterized in that: warning device comprises that a visible signal sends diode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 89103249 CN1047154A (en) | 1989-05-12 | 1989-05-12 | Increasing temperature warning device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN 89103249 CN1047154A (en) | 1989-05-12 | 1989-05-12 | Increasing temperature warning device |
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CN1047154A true CN1047154A (en) | 1990-11-21 |
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CN 89103249 Pending CN1047154A (en) | 1989-05-12 | 1989-05-12 | Increasing temperature warning device |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102693609A (en) * | 2011-03-22 | 2012-09-26 | 鸿富锦精密工业(深圳)有限公司 | Electronic device with high temperature alarm function |
CN107945448A (en) * | 2017-11-20 | 2018-04-20 | 浙江工业大学 | A kind of fire early-warning system |
-
1989
- 1989-05-12 CN CN 89103249 patent/CN1047154A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102693609A (en) * | 2011-03-22 | 2012-09-26 | 鸿富锦精密工业(深圳)有限公司 | Electronic device with high temperature alarm function |
CN107945448A (en) * | 2017-11-20 | 2018-04-20 | 浙江工业大学 | A kind of fire early-warning system |
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