JP2005300114A - Fire protection interlock method for fire alarm, electromagnetic-induced heating cooker, exhaust device such as range hood, and all-time ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire protection interlock method for a fire alarm, an electromagnetic-induced heating cooker, an exhaust device such as a range hood, and an all-time ventilator. <P>SOLUTION: A fire detecting unit 3 having a top plate 1a of the electromagnetic-induced heating cooker and its vicinity as a fire detection range 7, and a control unit 4 are attached to be connected each other via a signal line 9, in the exhaust device 2 such as the range hood positioned in an upper side of the electromagnetic-induced heating cooker, detect an ultraviolet ray emitted from a flame 15, or an infrared ray 15a therefrom, sound an acoustic device 5b of a fire alarm unit 5 when an accumulation time exceeds a fixed time (for example, 10 seconds), light a fire lamp 5a on, and transmit an output signal to the electromagnetic-induced heating cooker 1, the exhaust device 2 such as the range hood, and safety devices 10, 10a of the all-time ventilator 8 connected via the control unit 4 and the signal line 9, to interrupt electrification. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a technique of a method in which a fire alarm, an electromagnetic induction heating cooker, an exhaust device such as a range hood, and a continuous ventilation device are interlocked with fire prevention.

In Japan, the number of senior citizens is increasing, and the proportion of senior citizens who die late due to fire is increasing, which is a social problem. Known electromagnetic induction heaters are attracting attention as safe cooking utensils without using fire, but consumers feel that they are composed of unknown techniques compared to the handling of known gas heaters. Manufacturers are demanding that consumers read and understand the instruction manuals and displays before handling known induction heaters. However, if you forget to operate the switch, such as selecting the strength of the heating power according to the cooking content, or if you use a small amount of cooking oil, the temperature of the cooking oil will rise suddenly, causing smoke and ignition There was a possibility. Known electromagnetic induction heaters have a built-in safety stop function, a power stop function, etc. when an abnormal temperature rises as a conventional safety device. However, when the conventional safety device does not operate properly and becomes a source of fire, there has been a need for a method of reducing damage while ensuring life safety from a fire.
It is considered that the known technique closest to the present invention is the interlocking with the disaster prevention system described in the invention of the kitchen ventilation fan having the thermal image detecting means disclosed in Japanese Patent Publication No. 5-10561. This means that the fan rotation speed of the ventilation fan is varied by a thermal image detection means comprising a pyroelectric detection element group with respect to the gas stove, and the situation of the fire is judged from a two-dimensional thermal image of the kitchen space and linked to a fire alarm or the like. This is a known invention.
JP-A-5-10561

The known electromagnetic induction heater (1) has a mechanism for detecting and controlling the temperature of a heated object such as a pan using a temperature sensor or the like. When heat is applied to a heated object such as a pan (16) containing a small amount of cooking oil (16a) by this known electromagnetic induction heater (1), heating control or a conventional safety device is activated due to a rapid temperature rise. Prior to cooking, edible oil has traditionally caused smoke and fire. Therefore, the present invention activates the safety device (10a) for notifying the surroundings of the occurrence of fire by stopping the energization of the electromagnetic induction heater (1) by attaching a flame detector and a fire alarm when ignition occurs. Stop the heating and operate the exhaust device (2) such as the range hood and the safety device (10) of the regular ventilation device (8) to stop the energization and prevent the fire from becoming stronger. It is an object to invent a method to deal with initial fire fighting or evacuation.

In order to solve the above-mentioned problem as in FIG. 1 and FIG. 2 according to claim 1, the present invention assumes a case where an electromagnetic induction superheater (1) that does not emit fire in a normal use state becomes a source of fire. I studied the installation of the flame detector with the top plate (1a) of the electromagnetic induction heater and its vicinity as the fire detection range (7) and the fire alarm on the exhaust device (2) such as a range hood. . This is the most suitable mounting position for the electromagnetic induction superheater (1) and its vicinity as the fire detection range (7), but on the other hand, it is necessary to consider the usage environment of the flame detector and fire alarm was there. Sunlight and lighting fixtures do not malfunction due to the effects of ultraviolet rays or infrared rays emitted daily, and electronic components are exposed to hot air, oil smoke, and dust every time they are cooked. In order to attach a flame detector and a fire alarm to the exhaust system (2) such as a range hood so as not to cause a failure by spraying the detergent directly on the top, we first studied earnestly from its structure. As a result, as shown in FIG. 3, the flame detector and the fire alarm are divided into a fire detection unit (3), a control unit (4), and a fire alarm unit (5) and connected by a signal line (9). It came to.
3 and 4, when the fire detection unit (3) transmits a fire signal to the control unit (4) via the signal line (9), the control unit (4) accumulates the fire signal in time. The storage lamp (5d) is lit or flashed by operating the unit, but if the storage time does not reach a certain time (for example, 10 seconds), the storage time is returned to the initial state (for example, 0 seconds) and controlled. The unit does not transmit an output signal. However, when the accumulation time reaches a certain time (for example, 10 seconds), the control unit (4) transmits an output signal via the signal line (9), and the sound device (5b) of the fire alarm unit (5). And the fire light (5a) is turned on to notify the occurrence of a fire to the surroundings, and an exhaust device (2) such as a range hood provided with a safety device (10), a constant ventilation device (8), The control unit (4) transmits an output signal via the signal line (9) to the electromagnetic induction heater (1) having the safety device (10a) to operate the safety device (10) (10a). To stop energization.

Until the restoration switch (5c) (5e) is further pressed, the lighting of the fire light (5a) of the fire alarm unit (5) and the sound of the acoustic device (5b) are continued, and the electromagnetic induction heater (1) and the range The exhaust device (2) such as a hood and the continuous ventilation device (8) remain stopped.

In addition, when there is a distance between the ceiling (6) and the top part (2a) of the exhaust device such as a range hood, the exhaust duct (2d) is exposed, so as shown in FIGS. A decorative board may be prepared and a partition may be attached. When attaching a decorative panel to an exhaust device (2) such as a range hood linked to fire prevention, the control unit (4) can be inspected, repaired, or replaced, and the power plug (13) can be removed from the power outlet (12). The decorative board (11), which has a structure in which a part of the decorative board is opened by caulking (14) with silicon or the like, or a part of the decorative board is open after being fixed, is used as a cabinet. Etc. can be stored.

The present invention has the following effects. According to the invention of claim 1 in consideration of the actual use environment, the electronic circuits of the fire detection unit (3) and the control unit (4) are less likely to fail. And if a fire breaks out during cooking in the electromagnetic induction heater (1), the electromagnetic induction heater (1), the exhaust device (2) such as a range hood, and the continuous ventilation device (8) are stopped in conjunction with each other. Can not increase the momentum of flame (15). Moreover, since the fire light (5a) is turned on and the sound device (5b) sounds to notify the surroundings of the occurrence of the fire, the possibility of initial fire fighting will increase, and if it is not possible to take the initial fire fighting, the evacuation posture Can be taken.

According to the invention described in claim 2, as long as the restoration switch (5c) (5e) is not pressed, the sounding of the sound device (5b) and the lighting of the fire light (5a) are continued, and the known electromagnetic Since the induction heater (1), the exhaust device (2) such as a range hood, and the continuous ventilation device (8) continue to be stopped, the reliability of the fire prevention interlock is enhanced.

According to the invention of the decorative plate (11) having a partly open structure described in claim 3, the maintenance and inspection work of the control unit (4) and the work of inserting and removing the power plug (13) from the power outlet (12) This makes it easy to store maintenance and inspection parts as a cabinet.

As a result of earnest research, the flame detector and the fire alarm are divided into a fire detection unit (3), a control unit (4), and a fire alarm unit (5). It came to connect with. When the fire detection unit (3) is attached to the exhaust device (2) such as a range hood located above the electromagnetic induction heater (1) as shown in FIGS. The fire detection range (7) is limited to the top plate (1a) of the electromagnetic induction heater and its vicinity so that ultraviolet rays or infrared rays (15a) emitted from (15) are incident on the fire detection unit (3). The top position (2a) of the top plate (2a) of the exhaust system (2) such as a range hood that is not exposed to oily smoke, moisture or dust generated during cooking is most suitable for the control unit (4). I found out. The power lamp (4a) is turned on when power is supplied to the control unit, and the fire alarm unit (5) may be configured by incorporating a recovery switch (5c) and a power lamp (4a). In addition to being attached to an exhaust device (2) such as a range hood, the mounting position is considered to be easy to handle, and if the signal line (9) is extended, the vertical height is 0.8 m or more and 1.5 m or less from the floor surface. Although it can be mounted on a wall, it is necessary to select a place that is not exposed to oily smoke, moisture or dust. As the length of the signal line (9) connecting the fire detection unit (3) and the control unit (4) becomes shorter, the influence of electronic noise tends to be reduced, and the type of signal line (9) to be used Can be said to be suitable for those molded with an exterior that is not easily affected by a magnetic field.

The operating principle conforms to the Fire Service Act and is a well-known technique, so it will be briefly described. First, the flame detector (3a) used in the fire detection unit (3) includes an ultraviolet type and an infrared type, and either of them may be used in the present invention. In the case of using the ultraviolet ray type, a general tube sealed with a special gas is used for the ultraviolet ray detection tube using an external photoelectric effect called UVtron, and it is configured as shown in FIG. Ultraviolet light (15a) (wavelength of 0.18 μm to 0.3 μm) contained in the flame is detected and a fire signal is transmitted to the control unit (4). Next, when the infrared type is used, a general CO ₂ resonance type infrared sensor is used, and a fire is determined by detecting an infrared radiation spectrum peculiar to carbon dioxide gas generated when an object burns. Since it is known that there is a peak in the vicinity of the wavelength of 4.4 μm of the emission spectrum, this peak is often used. As an example of how to use the infrared type, the fire detection unit (3) incorporates an optical filter and an infrared sensor instead of the UV tron used in the ultraviolet type, and further uses the electrical signal captured by the infrared sensor. A processing unit that extracts and amplifies only the frequency band required for fire detection and calculates infrared intensity or flame flickering with time fluctuation is incorporated, and this processing unit transmits a fire signal to the control unit (4). . In this way, when the infrared flame detector is used, only the components constituting the fire detection unit (3) are compared with the fire prevention interlocking configuration diagram when the ultraviolet flame detector shown in FIG. 3 is used. It is different.

The control unit (4) has a function of accumulating a fire signal from the fire detection unit (3) for a certain period of time. This is called accumulation time (exceeding 5 seconds and within 60 seconds) and plays a role in preventing false alarms associated with fire prevention of the present invention. Next, when the control unit (4) starts accumulating, the accumulating lamp (5d) lights up or blinks. However, the accumulating time is constant (for example, the fire signal from the fire detecting unit (3) is not continuously input). If it has not reached 10 seconds, the control unit returns the accumulation time to the initial state (for example, 0 seconds) without transmitting an output signal. However, when a fire signal is continuously input from the fire detection unit (3) and the accumulation time reaches a certain time (for example, 10 seconds), the control unit transmits an output signal to the fire alarm unit (5) to send an audio device ( Ring 5b) and turn on the fire light (5a). For this operation principle, a known technique according to the Fire Service Act is used.

The fire prevention interlocking of the control unit (4), the fire alarm unit (5), the exhaust device (2) such as a range hood, the electromagnetic induction heater (1), and the constant ventilation device (8) is as shown in FIG. Connected by a signal line (9). In addition to the control unit (4), the exhaust device (2) such as a range hood and the electromagnetic induction heater (1) are connected to the signal line connection terminal and the safety device (10) (10a) ) Is provided. If the signal line (9) is connected to this connection terminal, the safety device (10) (10a) is electrically wired so that it can be operated. When the safety device is activated, the power source is disconnected from the electromagnetic induction heater (1), the exhaust device (2) such as the range hood, and the constant ventilation device (8) and is not energized until the recovery switch is pressed. However, since the safety device of the electromagnetic induction heater cuts off the power supply under the highest load condition, it is better to use a breaker that can reliably cut off. For this reason, since the safety device (10a) of the electromagnetic induction heater is distinguished from the exhaust device such as a range hood and the safety device (10) of the continuous ventilation device, the safety device of the electromagnetic induction heater is added to the recovery switch (5c). Is equipped with a dedicated recovery switch (5e).

In addition, although FIG. 1, FIG. 2, and FIG. 3 show an example of the installation in which the safety device (10a) is built in the electromagnetic induction heater, the already installed electromagnetic induction heater and the range hood The fire detection unit (3) of the present invention, the control unit (4), the fire alarm unit (5), and the safety device (10) (10a) are later installed on the exhaust device such as In the case of mounting and interlocking with fire prevention, the safety device (10a) may not be incorporated in the electromagnetic induction heater.

In addition, since the quality assurance promotion law enforced in 2003 requires manufacturers or contractors to display ventilation performance in general houses, there are an increasing number of properties equipped with a constant ventilation device (8). If outside air is taken in when a fire breaks out, the momentum of the fire will be strengthened. Therefore, it is necessary to stop the operation at the time of a fire by linking this constant ventilation device (8) with fire prevention. This constant ventilation device (8) is provided with a connection terminal and a safety device (10) for interlocking with fire prevention of the present invention. If the signal line (9) is connected to this connection terminal, the safety device (10) can be operated.

Unless the restoration switch (5c) (5e) is pressed, only the sound of the sound device (5b) and the lighting of the fire light (5a) are continuously output, and the electromagnetic induction heater (1) and the exhaust of the range hood, etc. Since the device (2) and the constant ventilation device (8) continue to be stopped, the initial fire extinguishing response or the evacuation response can be taken without increasing the momentum of the fire.

1 and 2 in which the structure of an exhaust device such as a range hood is described, the decorative board may be fixed by caulking (14) with silicon or the like at the time of construction, or with screws or the like. For this reason, it is necessary to use a decorative plate that is partially open during maintenance inspection. The decorative board (11) having a partially open structure shown in FIGS. 1 and 2 is an example. As a result, the power plug (13) can be removed from the power outlet (12) and work can be performed with the power stopped, and it also serves as a cabinet for storing spare parts and lightweight tools for maintaining performance. It is.

The present invention needs to satisfy the certification system stipulated in the Fire Service Law, or provide the above-mentioned method for interlocking with fire as a simple structure at a low cost and with certain specifications. If this certification system is satisfied, the construction and maintenance inspection work may be the exclusive work of qualified persons as stipulated by law. The known electromagnetic induction heater has a built-in safety stop function and a power stop function when an abnormal temperature rises as a conventional safety device, but these functions do not work and the fire prevention interlock of the present invention is not provided. The fire situation is shown in FIGS.

The ventilator such as a range hood used for fire prevention interlocking of the present invention spreads the fire column (15b) rolled up in the direction of exhaust fan rotation of the exhaust device such as the range hood through the duct as shown in FIGS. The fire damper (2C) is closed at the same time as the energization of the exhaust device such as a range hood is stopped.

Front view of an example of mounting fire prevention interlocking components Right-side view of an example with fire prevention interlocking components installed Configuration diagram of fire protection when using an ultraviolet flame detector Flow chart to interlock with fire prevention Front view of the fire situation when the conventional safety device of the electromagnetic induction heater does not operate and there is no fire prevention interlock Side view of the fire situation when the conventional safety device of an electromagnetic induction heater does not work and there is no fire prevention interlock

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic induction heater 1a Top plate of electromagnetic induction heater 2 Exhaust device such as range hood 2a Top plate 2b of exhaust device such as range hood Exhaust device control circuit 2c such as range hood Fire prevention of exhaust device such as range hood Damper 2d Exhaust duct of exhaust device such as range hood (φ150)
2e Exhaust fan casing of exhaust device such as range hood 2f Exhaust fan rotation direction of exhaust device such as range hood 2g Flame passing through duct of exhaust device such as range hood 2h Exhaust device filter such as range hood 3 Fire detection unit 3a Flame detector 4 Control unit 4a Control unit power light 5 Fire alarm unit 5a Fire light 5b Acoustic device 5c Restoration switch 5d Accumulation light 5e Electromagnetic induction heater restoration switch 6 Ceiling 6a Wall 6b Floor 7 Fire detection range 8 Regular ventilation device DESCRIPTION OF SYMBOLS 9 Signal line 10 Safety device 10a for stopping energization Safety device 11 for stopping energization of electromagnetic induction heater 11 Decorative plate 12 having a partially open structure Power outlet 12a for control unit Power supply line 13 for control unit Power plug 14 for unit Caulking to decorative board with silicon etc. 15 Flame 1 5a Ultraviolet rays emitted from flames or infrared rays 15b Fire pillar 16 rolled up in the exhaust fan rotation direction of an exhaust device such as a range hood Pan 16a Edible oil 16b Dispersed ignited edible oil

Claims (3)

Assuming that the electromagnetic induction heater (1) is the source of the fire, the induction device (2) such as a range hood located above the electromagnetic induction heater as shown in FIGS. A fire detection unit (3) incorporating a flame detector having a fire detection range (7) in the vicinity of the top plate (1a) and a control unit (4) are attached. When the fire detection unit (3) transmits a fire signal to the control unit (4) via the signal line (9), the control unit (4) activates and accumulates the accumulation unit that accumulates the fire signal over time. Turn on or blink the light (5d)
If the accumulation time does not reach a certain time (for example, 10 seconds), the control unit does not transmit an output signal by returning the accumulation time to the initial state (for example, 0 seconds).
When the accumulation time reaches a certain time (for example, 10 seconds), the control unit (4) transmits an output signal via the signal line (9) and rings the sound device (5b) of the fire alarm unit (5). And let the fire light (5a) turn on to inform the surroundings of the fire,
For the exhaust device (2) such as a range hood having the safety device (10), the constant ventilation device (8), and the electromagnetic induction heater (1) having the safety device (10a), a control unit ( 4) A fire-interlocking method in which an output signal is transmitted via the signal line (9), and the safety devices (10) and (10a) are operated to stop energization.   The fire-protection interlocking method according to claim 1, wherein when the control unit (4) activates the fire-protection interlock according to claim 1, the energization is stopped unless the recovery switches (5c) and (5e) are pressed.   Easy maintenance and inspection of the control unit (4) and insertion / removal of the power plug (13) even after fixing the periphery of the decorative board with silicon (14) or screws, etc. during construction of exhaust devices such as range hoods An exhaust device (2) such as a range hood having a decorative plate (11) having a partly open structure that allows a maintenance inspection part or the like to be stored as a cabinet, and the fire prevention of claim 1 Interlocking method.

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