KR20090101428A - Apparatus for preventing fire in temperature controller - Google Patents

Abstract

PURPOSE: A fire prevention apparatus of the temperature controller is provided, which can prevent burn caused by overheat and fire by disconnecting a fuse compulsorily. CONSTITUTION: A fire prevention apparatus of the temperature controller includes a thermochromic heating line, an overheating detection part, and a fuse disconnection part. The thermochromic heating line includes a first heating line(11), a second heating line(13), and a thermistor. The overheating detection part outputs the fuse single line signal by detecting overheat of the thermochromic heating line. The fuse disconnection part disconnects a fuse by receiving the fuse single line signal. The fuse disconnection part includes an exothermic resistance and a relay.

Description

Fire protection device of thermostat {APPARATUS FOR PREVENTING FIRE IN TEMPERATURE CONTROLLER}

The present invention relates to a temperature control device, and more particularly, to a fire protection device of a temperature control device for preventing the occurrence of a fire by disconnecting the fuse or blocking the power supply when the temperature of the induction heating wire rises above a certain temperature.

In general, sleep is a very important factor for a person's health. Also, even if you sleep, you need a good night's sleep. In human sleep, bedside conditions such as temperature and humidity are important requirements. In general households, in order to maintain the temperature of the bed properly, electric bedding, electric bedding, and electric steamers such as electric steamers are used a lot. The heat transfer bedding and the heater are built with a heating wire therein, and heat is generated when power is supplied to the heating wire. In general, such electrothermal bedding, a heater is a mandatory temperature controller for sensing the temperature around the heating wire to control the power supply correspondingly to generate heat of the user desired temperature.

The conventional bedding heating wire has shorted one end of two metal heating wires arranged in parallel, and is equipped with a separate temperature sensing sensor separated from the heating wire to detect temperature. However, the method of separating the temperature sensor and the heating wire has a problem that not only does not detect the temperature of the entire heating wire caused by a short circuit inside the heating wire, but also does not detect local overheating at an arbitrary position. Therefore, when the heating wire is locally overheated or short-circuit and disconnection, there is a problem that a fire and an electric shock may occur.

As another conventional method, a method of detecting a temperature with a third electric wire by adding a separate temperature sensor to an outer circumferential surface or an inner center surface of which two ends are short-circuited among two metal heating wires arranged in parallel is used. However, since the temperature sensor layer and the third metal layer are added to the heating wire without the separation from the heating wire, the thickness of the non-magnetic heating wire is increased so that it cannot be used for thin bedding, and the heating wire is produced. There are problems such as complicated process and rising production cost. In addition, all of the above-mentioned prior arts have a problem in controlling the temperature of the heating wire, or the thickness of the heating wire has a problem that it is not practical, or does not block harmful electromagnetic waves due to voltage and current.

On the other hand, with respect to the heating wire, general non-magnetic heating wire used as a heating element in electric heating bed, electric heating bed such as electric mat or electric mat or heating pad, a heater, generally, a ventricle made of polyester thread or glass wool, spirally to the ventricles A heater coil to be wound, an inner insulator coated on the heater coil of the outer circumferential surface of the ventricle for insulation, a shield wired and grounded in the form of a conductor or a net on the outer circumferential surface of the inner insulator, and an outer insulator coated on the shield Etc. In the above configuration, the heater coil and the shield are electrically connected in series with each end connected to each other, and each of the leading ends thereof is a power input terminal respectively connected to the (+) (-) terminal of the power source.

Such a general magnetic field-free heating wire has a disadvantage that the thickness is very thick due to its internal insulator and weak in flexibility. That is, in the conventional bedding-type non-magnetic heating wire, because the internal insulation is softened due to the high heat of the heater coil during heat generation, the insulation is sharply dropped, so the thickness of the internal insulation has to be thick to prevent the short circuit between the heater coil and the shield. Is very thick (at least 6 mm), when applied to electric mats, etc., is blown over the epidermis and exhausted to the user's body, and it is almost impossible to apply to thin beddings such as electric mattresses, blankets, and sheets because of thickness and stretchability. It was impossible.

In order to solve this problem, the applicant has devised a sensitive heating wire as disclosed in Korean Patent Laid-Open Publication No. 2004-87853 (hereinafter referred to as "prior patent 1"). The improved heat sensitive wire reduces the thickness of the inner insulator by using a heating wire coated with an enamel layer, and at the same time, the lead wire is wound in a spiral structure on the outer surface of the inner insulator so that the performance does not deteriorate even when repeatedly subjected to bending stress. It was to have. This makes it possible to completely solve the conventional problem that the thickness becomes too thick and the flexibility is poor.

However, the improved heating wire could not perform the function of detecting local overheating and controlling energization accordingly. If a heating line of several tens of meters is locally overheated at a certain position or exceeds the reference temperature, there is a risk of burns, and thus the power supply must be shut off. For this purpose, a separate temperature detector must be provided. In other words, in order to detect the temperature of the long heating wire, there is a cumbersome point in that a plurality of temperature detection devices must be additionally provided at an arbitrary position. There is a problem that the temperature detection device can not be attached to the bedding.

In order to solve this problem, the present applicant has registered the patent No. 10-0553815 (hereinafter referred to as "prior patent 2") which is a temperature controller using a U-turn diode method and a patent application No. 2009-14386 (hereinafter referred to as "prior patent"). Temperature controllers such as those disclosed in 3 ").

Prior patent 2 uses two diodes to provide a current in one direction from the first heating line to the second heating line to detect the temperature of the sensitive heating line at both power sources of the AC input power, and detects the temperature according to the current. The negative power of the AC input power supplies the current in the other direction so as to pass the first heating wire from the second heating wire to heat the sensitive heating wire. Because of this configuration, the prior patent 2 can detect not only the temperature of the entire heating wire caused by a short circuit of the heating wire, but also local overheating at an arbitrary position, grounding the surface electric field of the heating wire to zero potential, and generating an induction magnetic field. Has the effect of preventing.

The prior patent 3 operates in the same manner as the prior patent 2 when the temperature is detected, and is configured such that the first heating line and the second heating line of the sensitive heating line are connected in parallel by a plurality of diodes when heated, so that the first heating line and the second heating line are respectively. Heating to provide parallel heating. Since it is configured as described above, even when one heating line of the first heating line and the second heating line is disconnected, the heating operation can be performed by the other heating line.

As described above, the preceding patents have various effects, but the temperature can be detected when the temperature of the heating element increases rapidly due to a short circuit of the heating element or the failure of another circuit. There was a problem that can not cope in advance.

Accordingly, an object of the present invention is to provide a fire protection device of a temperature control device for preventing the occurrence of a fire by forcibly disconnecting the fuse when the temperature of the induction heating wire rises above a certain temperature.

Another object of the present invention to provide a fire protection device of the temperature control device to prevent the occurrence of fire by cutting off the power provided to the temperature control device when the temperature of the induction heating wire rises above a certain temperature.

Fire prevention device of the temperature control device of the present invention for achieving the above object; A temperature detecting device having a power supply unit and a temperature fuse connected in series with the power supply unit, the temperature detecting device including a first heating wire, a second heating wire, and a thermistor, and outputting a fuse disconnection signal by detecting overheating of the thermal heating wire; And an overheat detection unit and a fuse disconnection unit receiving the fuse disconnection signal and disconnecting the fuse, wherein the fuse disconnection unit generates a magnetic field when the fuse disconnection signal is input and is turned on by the generated magnetic field. And a heat generating resistor disposed adjacent to the temperature fuse, one end of which is connected to the fuse and the other end of which is connected to the relay to generate heat by being supplied with power from the power supply unit when the relay is turned on. Characterized by including

The overheat detection unit is characterized in that the microcomputer.

Another fire protection device of the temperature control device of the present invention for achieving the above object; A temperature detecting device having a power supply unit and a temperature fuse connected in series with the power supply unit, the temperature detecting device including a first heating wire, a second heating wire, and a thermistor and detecting an overheating of the thermal heating wire and outputting a power cutoff signal And an overheat detection unit and a relay connected in series with the power supply unit and turned off when the power off signal is input.

The overheat detection unit is characterized in that the microcomputer.

The present invention has the effect of preventing burns and fire due to overheating by forcibly disconnecting the fuse when the temperature of the sensitive heating wire reaches a temperature that may cause a fire.

1 is a view showing a part of the configuration of the temperature controller using the u-turn diode method to which the present invention is applied

2 shows an equivalent circuit diagram of FIG. 1 at both power sources.

3 is a view showing a part of the configuration of a thermostat using a conventional parallel heating method

4 is a diagram illustrating an equivalent circuit of FIG. 3.

5 is a view for explaining a temperature detection point in the equivalent circuit of FIG.

6 is a view showing waveforms of an AC input power source for explaining the basic operation of temperature detection and heating;

7 is a circuit diagram illustrating an application example to which the u-turn diode method of the present invention is applied.

8 is a circuit diagram showing an application example to which the parallel heating method of the present invention is applied.

9 is a diagram illustrating an impedance graph of a thermistor which may be applied to the present invention.

FIG. 10 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device according to a first embodiment of the present invention is applied to a first temperature detection point.

FIG. 11 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device according to a first embodiment of the present invention is applied to a second temperature detection point.

12 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device according to a first embodiment of the present invention is applied to a third temperature detection point.

FIG. 13 is a circuit diagram illustrating a configuration of a parallel heating type temperature control device in which an analog fire protection device according to a first embodiment of the present invention is applied to a first temperature detection point.

14 is a circuit diagram showing the configuration of a temperature control apparatus of a parallel heating method in which an analog fire protection device according to a first embodiment of the present invention is applied to a second temperature detection point.

15 is a circuit diagram showing the configuration of a temperature control device of a parallel heating method in which an analog fire protection device according to a first embodiment of the present invention is applied to a third temperature detection point.

FIG. 16 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device according to a second embodiment of the present invention is applied to a first temperature detection point.

17 is a circuit diagram showing the configuration of a temperature control device of a parallel heating method in which an analog fire protection device according to a second embodiment of the present invention is applied to a first temperature detection point.

FIG. 18 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which a digital fire protection device according to a third embodiment of the present invention is applied to a third temperature detection point.

FIG. 19 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which a digital fire protection device according to a third embodiment of the present invention is applied to a second temperature detection point.

20 is a circuit diagram showing the configuration of a temperature control device of a parallel heating method in which a digital fire protection device according to a third embodiment of the present invention is applied to a third temperature detection point.

21 is a circuit diagram showing the configuration of a temperature control device of a parallel heating method in which a digital fire protection device according to a third embodiment of the present invention is applied to a second temperature detection point.

FIG. 22 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which a digital fire protection device according to a fourth embodiment of the present invention is applied to a third temperature detection point.

FIG. 23 is a circuit diagram illustrating a configuration of a parallel heating type temperature control device in which a digital fire protection device according to a fourth embodiment of the present invention is applied to a third temperature detection point.

24 is a view showing the configuration of the fuse disconnection of the digital fire protection device using a heating resistance according to a fifth embodiment of the present invention

FIG. 25 is a view illustrating a configuration of a fuse disconnection unit of a digital fire protection device when the metal heating element and the heating line short detection unit for detecting the heating line short are provided according to the sixth embodiment of the present disclosure.

FIG. 26 is a view showing a case in which a fuse disconnection part is formed of a relay according to a sixth embodiment of the present invention; FIG.

FIG. 27 is a view showing a case in which a fuse disconnection part is formed of a heating resistor and a relay according to a seventh embodiment of the present invention; FIG.

FIG. 28 is a view illustrating a case where a fire protection device is configured as a power supply blocking unit instead of a fuse disconnection unit according to an eighth embodiment of the present invention; FIG.

※ Explanation of codes for main parts of drawing

110: overheat detection unit 120: fuse disconnection

130: temperature control unit 140: overheat detection unit (microcomputer)

141 and 200: photocoupler 180: heat generating portion

Hereinafter, the configuration and operation of a temperature control device having a fire protection function according to the present invention will be described with reference to the drawings. In the following description of the present invention, it should be noted that detailed descriptions and reference numerals will be omitted for the same components as the prior patents 1 to 3.

1 is a view showing a part of the configuration of the thermostat using a conventional U-turn diode method, Figure 2 is a view showing the equivalent circuit diagram of the Figure 1 in both power sources, Figure 3 is a part of the thermostat using a conventional parallel heating method. 4 is a diagram illustrating an equivalent circuit of FIG. 3, FIG. 5 is a diagram for explaining a temperature detection point in the equivalent circuit of FIG. 3, and FIG. 6 is a basic operation of temperature detection and heating. The waveform of the AC input power for demonstrating this is shown.

1 to 6, the temperature control device according to the present invention performs a temperature detection operation on a positive (+) power source of an AC input power source, and a heating operation on a negative (-) power source, as shown in FIG. 6. do. Therefore, the current direction should be changed according to the temperature detection and heating operation. In this way, a current direction converting section 20 for changing the current direction in accordance with the AC input power for the temperature detection operation and the heating operation is provided.

In the case of the U-turn diode type as shown in FIGS. 1 and 2, the current direction conversion unit 20 has a cathode connected to one end C of the first heating line 11 and an anode at the other end D ″ of the second heating line 13. The second diode is connected to the first diode 21 and the other end (C ") of the first heating wire 11 is connected to the second diode of the anode is connected to one end (D) of the second heating wire 13 connected to the ground (22), a trigger input unit 23 for receiving a trigger from a trigger output unit (not shown), an anode connected to one end C of the first heating line 11, and a cathode connected to the input unit 1, The thyristor 24 has a gate connected to the trigger input unit 23.

In the temperature detection operation, as shown in FIG. 2, the first diode 21 is equivalently opened, and the current direction is the power supply section 1 → resistance 2 → first heating line 11 → thyristor 12 → second heating line ( 13) → flows to the power supply unit (2).

The points capable of measuring the temperature of the sensitive heating wire 10 in the current direction conversion unit 20 configured as described above are provided at both ends of the resistor 2 connected in parallel with the thyristor 24 (hereinafter referred to as “first temperature detection point”). And both ends of the anode and ground terminals of the thyristor 24 (hereinafter referred to as "second temperature detection point") and both ends of the second diode 22 (hereinafter referred to as "third temperature detection point"). Can be.

As shown in FIGS. 4 and 5, in the parallel heating type current direction converter 20, a cathode is connected to the other end C ″ of the first heating line 11 and the other end D ″ of the second heating line 13. An anode is connected to one end C of the second diode 22 and the first heating line 11 to which the anode is connected, a cathode is connected to the power supply unit 1, and a trigger is input from the trigger input unit 24. It consists of the thyristor 24 comprised. At this time, one end D of the second heating line 13 is grounded. 4 and 6, the current direction is the same as that of the U-turn diode method, and the temperature detection point is the same as that of the U-turn diode method.

7 is a circuit diagram showing an application example to which the u-turn diode method of the present invention is applied, and FIG. 8 is a circuit diagram showing an application example to which the parallel heating method of the present invention is applied.

7 and 8 illustrate the configuration of controlling the temperature of the response heating line 10 by the variable resistor (R2) 132 for each of the U-turn diode method and the parallel variable method, and the trigger input unit 23 has two resistors. It is shown a case consisting of and a capacitor.

9 is a graph showing an impedance according to the temperature of the thyristor (SCR) applied to the present invention, showing the overheating impedance operating region according to the present invention.

As shown in FIG. 9, an overheating threshold temperature at which a person may be burned or a fire may be defined, and an overheating impedance operation area is defined as an overheating impedance value for the overheating threshold temperature. In FIG. 9, the minimum temperature is defined as about 120 degrees, and an area of 20 Hz or less with respect to 120 degrees is defined as an overheating impedance operating region. In FIG. 9, an overheating impedance operating region is defined as about 120 degrees, but is not limited thereto. The temperature defining the overheating impedance operating region may be variously applied to 90 degrees and 100 degrees.

10 to 17 illustrate a case where the fire protection device 200 according to the present invention is applied to the application examples of FIGS. 7 and 8. Therefore, it should be noted that the description of the configuration not related to the present invention is omitted.

The fire protection device 200 according to the present invention includes an overheat detection unit 110 and a fuse disconnection unit 120. A description with reference to FIGS. 9 to 15 is as follows.

FIG. 10 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device according to a first embodiment of the present invention is applied to a first temperature detection point, and FIG. 11 is a first embodiment of the present invention. FIG. 12 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device applied to a second temperature detection point. FIG. 12 is a view illustrating an analog fire protection device according to a first embodiment of the present invention. 3 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device applied to a temperature detection point, and FIG. 13 illustrates a parallel heating method in which an analog fire protection device according to a first embodiment of the present invention is applied to a first temperature detection point. FIG. 14 is a circuit diagram illustrating a configuration of a temperature control device. FIG. 14 is a view illustrating a second fire protection device of an analog type according to a first embodiment of the present invention. FIG. 15 is a circuit diagram illustrating a configuration of a parallel heating type temperature regulating device applied to a detection point, and FIG. 15 is a temperature regulation using a parallel heating type applied to an analog fire protection device according to a first embodiment of the present invention to a third temperature detection point. A circuit diagram showing the configuration of the device.

10 to 17, the fire protection device 200 according to the first embodiment of the present invention includes a fuse 2, a thermal heating line 10, and an overheat detection unit 110 connected in series to an AC power source 1. ) And a fuse disconnection unit 120.

The thermal heating wire 10 surrounds the first heating wire 11 and the first heating wire 11 and the thermistor 12 whose impedance changes with temperature, and the second heating wire 13 wound around the thermistor 12. It outputs a temperature signal according to the impedance of the temperature change of the thermistor 12 by the temperature detection current and the heating current.

The overheat detection unit 110 is connected to the first heating wire 11 to receive a temperature signal when the impedance of the thermistor 12 is in the overheat impedance operating region and outputs a fuse disconnection signal.

The fuse disconnection unit 120 receives the fuse disconnection signal and forcibly disconnects the fuse 2.

The overheat detection unit 110 according to the first embodiment of the present invention is a first resistor (R1) connected in parallel to the power supply unit 1 and the fuse (2), and is connected in series with the first resistor (R1) A second resistor R2, a collector connected between the first resistor R1 and a second resistor R2, an emitter connected to a ground terminal of the power supply unit, and a base connected to the first heating wire. And a transistor Tr that receives the temperature signal when the thermistor's impedance is in the overheat impedance operating region and outputs the fuse disconnection signal to the collector. The transistor Tr uses an NPN transistor.

A power source, that is, a temperature signal, is divided into a base of the transistor by a resistance value of the temperature controller 130 and an impedance of the thermistor, that is, a resistance value according to the temperature of the thermistor. The transistor Tr is turned on according to the temperature signal to output a fuse short signal through the collector. The transistor may further include a third resistor R3 which is a voltage drop resistor, and a capacitor C1 connected to the collector and the base of the transistor Tr and outputting a stable fuse disconnection signal. .

11, 12, 14, and 15, the fire protection device 20 includes a zener diode ZD that outputs a temperature signal to the base only at a breakdown voltage or more at the base end of the transistor Tr. It may further include.

The fuse disconnection unit 120 is turned on to receive the fuse disconnection signal and short-circuits the power supply unit 1 to forcibly disconnect the fuse 2. The fuse disconnection unit 120 may be a thyristor (SCR) including an anode connected to the fuse 2, a cathode connected to a ground terminal, and a gate connected to a collector of the transistor Tr. And a second transistor (not shown) including a collector connected to 2), an emitter connected to ground, and a base connected to the collector of the transistor Tr.

FIG. 16 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device according to a second embodiment of the present invention is applied to a first temperature detection point, and FIG. 17 is a second embodiment of the present invention. Is a circuit diagram showing a configuration of a temperature control device of a parallel heating method in which an analog fire protection device according to the present invention is applied to a first temperature detection point.

16 and 17 show a fire protection device in the case of using a PNP type transistor, the overheat detection unit 110 of the fire protection device 200 is a transistor and the transistor of the transistor as the PNP type transistor Tr is used. And a second resistor R2 having one end connected in series to the first resistor R1 and the other end being grounded. The fuse disconnection unit 120 is connected between the first resistor R1 and the second resistor R2. In detail, a thyristor gate is connected between the first resistor R1 and the second resistor R2 to distribute the power distributed by the first resistor R1 and the second resistor R2, that is, a fuse disconnection signal. The thyristor is turned on.

10 to 17, the analog fire protection device has been described. Hereinafter, a digital fire protection device will be described.

FIG. 18 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which a digital fire protection device according to a third embodiment of the present invention is applied to a third temperature detection point, and FIG. 19 is a third embodiment of the present invention. Is a circuit diagram showing a configuration of a U-turn diode type temperature control device applied to the second temperature detection point is a digital fire protection device. FIG. 20 is a circuit diagram illustrating a configuration of a parallel heating type temperature control device in which a digital fire protection device according to a third embodiment of the present invention is applied to a third temperature detection point, and FIG. 21 is a third embodiment of the present invention. Is a circuit diagram showing the configuration of a parallel heating type temperature controller applied to a second type of fire protection device.

The fire protection device according to the third embodiment of the present invention is composed of an overheat detection unit 140 including a fuse disconnection unit 120 and a micom.

The fuse disconnection unit 120 is formed of a thyristor in the same manner as in the analog method.

The microcomputer stores the overheating threshold temperature value and / or the critical impedance for the overheating impedance operation section as shown in FIG. 9 in order to perform the overheating prevention operation according to the present invention as well as the temperature detection operation of the temperature control device. Measure temperature or impedance, and output a fuse disconnection signal to the fuse disconnection unit 120 when the measured temperature or impedance value is smaller than the threshold temperature value or the critical impedance to forcibly short the power supply unit 1. The fuse 2 is disconnected.

FIG. 22 is a circuit diagram illustrating a configuration of a U-turn diode type temperature control device in which an analog fire protection device is applied to a third temperature detection point in a digital temperature control device according to a fourth embodiment of the present invention. 4 is a circuit diagram illustrating a configuration of a parallel heating type temperature control device in which an analog fire protection device is applied to a third temperature detection point in a digital temperature control device according to a fourth embodiment of the present invention.

In the fourth embodiment, a fire protection device is configured using the photo coupler 141. Specifically, the fire protection device of the fourth embodiment is connected between the impedance resistor (R2) of the first resistor (R1) and thermistor 12 and the first resistor (R1) and impedance resistor (R2) to the impedance resistor ( When R2) is less than or equal to the threshold impedance, the light emitting unit 41-1 emitting light and the light generated by the light emitting unit 41-1 are turned on to receive a fuse disconnection signal by the power of the DC power supply unit 42. The overheat detection unit 110 including the photocoupler 41 including the light receiving unit 41-2 and the fuse disconnection signal are turned on to short-circuit the AC power supply unit 1 to short-circuit the fuse 2. It consists of the fuse disconnection part 110 which is a thyristor to disconnect. A photo thyristor may be used instead of the photo coupler 141.

FIG. 24 is a view illustrating a digital fire protection device using a heating resistance according to a fifth embodiment of the present invention, and shows only a configuration of a fuse disconnection unit.

Referring to FIG. 24, the fuse disconnection unit 160 of the fire protection device according to the fifth embodiment of the present invention may include a disconnection unit 161 and a short circuit unit in which a fuse 162 and a heat generating resistor 163 are integrally formed. 164 and the trigger input unit 165.

The heat generating resistor 163 is disposed adjacent to the fuse 162 and dissipates heat during operation to apply heat to the adjacent fuse 162 to disconnect the fuse 162.

The short circuit unit 164 may be configured as a thyristor (SCR), a relay, or a transistor. When the fuse disconnection signal is input from a microcomputer (not shown), the short circuit unit 164 is turned on to supply the current generated by the AC power supply unit 1 to the heating resistance ( 163 to heat the heat generating resistor 163.

The trigger input unit 165 is connected between the microcomputer and the thyristor (SCR) to stably provide the fuse disconnection signal, that is, the trigger pulse to the gate of the thyristor (SCR), and includes a resistor (R1), a resistor (R2), and a capacitor. (C).

FIG. 25 is a diagram illustrating a fuse disconnection part of a digital fire protection device using a metal heating element according to a sixth embodiment of the present invention, showing a fire protection device without a thermistor.

The fire protection device according to the sixth embodiment of the present invention is connected to the power supply unit 1 and the power supply unit in series, and connected in parallel to the power supply unit 1 and the fuse 2, so that the microcomputer A fuse disconnection unit 170 that receives a fuse disconnection signal, that is, a second trigger signal, and short-circuits and disconnects the fuse 2, and one end of the fuse disconnection unit 170 is connected to the power supply unit 1. Heating unit 180 for outputting a heating current that changes according to a temperature coefficient in a temperature region higher than a using temperature, and one end of which is connected to the other end of the heating unit 180 and the other end is grounded to generate the heating current. A heating current detection resistor 191 for outputting a temperature signal according to the change of the heating current output from the unit 180 to the microcomputer, and connected between the heating unit 180 and the heating current detection resistor 191 to turn from the microcomputer. Turned on by receiving an on-signal Includes a switch unit 190. The switch unit 190 receives an anode connected to the other end of the heating unit 180, a cathode connected to the heating current detection resistor 191, and a turn-on signal, that is, a first trigger pulse from a microcomputer. Receiving a turn-on signal from the micom and the emitter connected between the thyristor 190 configured as a gate and the collector connected to the other end of the heating unit 180 and the heating current detection resistor 191 (Rct). It may be composed of a transistor composed of a gate.

The heating unit 180 includes a first heating line 181, a second heating line 182, a first diode D, and a second diode D2. In FIG. 25, it is noted that the second diode D2 is not shown, since the equivalent circuit is shown at the time of temperature detection, that is, the positive power of the AC power output from the power supply unit 1. The first heating wire 181 and the second heating wire 182 are metal heating elements having a high temperature coefficient, and the impedance is changed in a region higher than the use temperature. The fuse disconnection unit 170 may be a thyristor or a transistor which is turned on by receiving a fuse disconnection signal from a microcomputer as shown in FIGS. 10 to 23, and uses a heating resistor 163 as shown in FIG. 24. Can be applied.

In operation, when the turn-on signal is input from the microcomputer to the thyristor 190, the thyristor is turned on. At this time, if the heating unit 180 is operating in a region higher than the use temperature, that is, the temperature region where the impedance of the metal heating element changes, the power value of the heating current detection resistor 191, that is, heating by the impedance change of the heating unit 180 The value of the current changes, and the microcomputer detects this and outputs a fuse disconnection signal to the fuse disconnection unit 170 to disconnect the fuse 2.

The fire protection device further includes a heating line short detection unit 200 which detects a short, that is, a short circuit between the primary heating line 181 and the secondary heating line 182 of the heating unit 180 and outputs the heating line short signal to the microcomputer 1400. do.

The heating line short detection unit 200 is connected to the first heating line 181 and the second heating line 182 of the heating unit 180 in parallel, that is, in parallel to the U-turn diode 183 is turned on during normal operation to light up A light emitting unit 201 which emits light and turns off when the first heating line 181 and the second heating line 182 are short-circuited, and detects the light emitting line short signal when the light emitting unit 201 is turned off, and generates a short circuit of a heating line. It consists of a light receiving unit for outputting.

At this time, the microcomputer 140 outputs the fuse disconnection signal to the fuse disconnection unit 170 to disconnect the fuse 163.

FIG. 26 is a diagram illustrating a fuse disconnection unit configured as a relay according to the sixth embodiment of the present invention.

The relay according to the sixth embodiment of the present invention is composed of a switch and a coil, one contact of the switch is connected in parallel to the fuse (2) connected in series to one end of the power supply unit 1, the other end is connected to ground, One end of the coil receives a turn-on signal and the other end is grounded, so that the switch is turned on by a magnetic field generated by the coil when the turn-on signal is input to the coil. When the relay 165 is turned on, the power is shorted and the fuse 2 is disconnected.

 FIG. 27 is a view illustrating a case in which a fuse disconnection part is formed of a heating resistor and a relay according to a seventh embodiment of the present invention.

The fuse disconnection unit according to the seventh embodiment includes a heating resistor 163 and a relay 165.

27, one end of the heating resistor 163 is connected in parallel to the fuse 162 connected in series to one end of the power supply unit 1, and the other end thereof is connected to one contact of the switch of the relay.

As described above, the relay 165 has one contact point connected to the other end of the heating resistor 163, the other contact point being grounded, one end of the coil connected to a microcomputer, etc. to receive a turn-on signal, and the other end being grounded. .

When the turn-on signal is input to one end of the relay coil, a magnetic field is formed in the coil, and the switch is turned on by the magnetic field. When the switch is turned on, a current by the power of the power supply unit 1 flows to the heat generating resistor 163 and the heat generating resistor 163 generates heat to release heat, and the fuse 162 is disconnected by the heat. The heat generating resistor 163 and the fuse 2 may be integrally formed, or may be formed separately, but may be integrally formed to improve the disconnection effect of the fuse 162 due to the heat generated by the heat generating resistor 163. desirable.

1 to 27 illustrate a fire protection device that prevents a fire by disconnecting a fuse when overheating a temperature control device such as a thermal mat.

Hereinafter, a case in which a fire is prevented by cutting off a power supply without breaking a fuse during overheating will be described.

FIG. 28 is a diagram illustrating a case where a fire protection device is configured as a power supply blocking unit instead of a fuse disconnection unit according to an eighth embodiment of the present invention.

The fire protection device to which the power supply cutoff unit according to the eighth embodiment of the present invention is applied includes a power supply unit, a thermal heating line 10, an overheat detection unit 110 and 140, and a power supply cutoff unit 50. The overheat detection unit 110 or 140 detects the temperature of the heating element heating line 10 through the thermistor included in the heating element heating line 10, and if the detected temperature of the heating element heating line 10 is equal to or higher than the reference set temperature, the power-off signal Output to the power supply cut-off unit 50.

The power supply cutoff unit 50 is connected in series with the power supply unit and is turned off when the power cutoff signal is input to cut off the power provided from the power supply unit to the thermal heating element 10. The power supply cutoff unit 50 has one contact point connected to the power supply unit, the other contact point connected to the thermal heating element 10 input terminal, and the turn-on state in which the one contact point and the other contact point are normally connected, and the power cutoff In the signal history, a relay that is turned off by disconnecting the one contact point and the other contact point may be used.

The overheat detection unit may be configured as an analog overheat detection circuit as shown in FIG. 12, or may be a microcomputer as shown in FIGS. 18 to 24.

On the other hand, the present invention is not limited to the above-described typical preferred embodiment, it can be carried out in various ways without departing from the gist of the present invention various modifications, changes, substitutions or additions in the art Anyone who has this can easily understand it. If the implementation by such improvement, change, replacement or addition falls within the scope of the appended claims, the technical idea should also be regarded as belonging to the present invention.

Claims (6)

A temperature detection device having a power supply and a temperature fuse connected in series with the power supply, A heating element including a first heating element, a second heating element, and a thermistor; An overheat detection unit for detecting an overheat of the thermal heating element and outputting a fuse break signal; A fuse disconnection unit receiving the fuse disconnection signal and disconnecting the fuse; The fuse disconnection unit, A relay which generates a magnetic field upon input of the fuse disconnection signal and is turned on by the generated magnetic field; It is disposed adjacent to the temperature fuse, one end is connected to the fuse and the other end is connected to the relay includes a heat generating resistor for disconnecting the temperature fuse by generating heat by receiving power from the power supply unit when the relay is turned on Fire protection device of the temperature detection device, characterized in that. The method of claim 1, And the overheat detection unit is a microcomputer. The method of claim 1, The overheat detection unit, A first resistor connected to the power supply unit and the fuse in parallel; A second resistor connected in series with the first resistor; And a collector connected between the first resistor and the second resistor, an emitter connected to the ground terminal of the power supply unit, and a base connected to the first heating wire, wherein the impedance of the thermistor is in an overheating impedance operating region. And a transistor configured to receive a temperature signal and output the fuse disconnection signal to the collector. A temperature detection device having a power supply and a temperature fuse connected in series with the power supply, A heating element including a first heating element, a second heating element, and a thermistor; An overheat detector for detecting an overheat of the thermosensitive heating wire and outputting a power cutoff signal; And a relay which is connected in series with the power supply and turned off when the power-off signal is input. The method of claim 4, wherein And the overheat detection unit is a microcomputer. The method of claim 4, wherein The overheat detection unit, A first resistor connected to the power supply unit and the fuse in parallel; A second resistor connected in series with the first resistor; And a collector connected between the first resistor and the second resistor, an emitter connected to the ground terminal of the power supply unit, and a base connected to the first heating wire, wherein the impedance of the thermistor is in an overheating impedance operating region. And a transistor configured to receive a temperature signal and output the fuse disconnection signal to the collector.