JPH04115482A - Temperature alarm device for heating cooker - Google Patents

Abstract

PURPOSE:To light an indicating lamp until the temperature in a heater, etc., falls to a safety temperature even if a power supply is disconnected, by feeding power to a light emitting element from an electric double layer condenser when disconnection to the heater is detected by current-flow detecting means. CONSTITUTION:When a switch AS1 is closed, a heater, etc., 1 are electrified to be heated. At the same time, a switch BS2 closes and a switch CS3 closes a terminal t1. Subsequently, an alternating current from a power supply 2 is converted into a directly current with an AC/DC converter 3, and it is stored in an electric double layer condenser 4. Next, after finishing cooking, the switch AS1 is opened to stop energizing the heater, etc., 1 followed by the opening of the switch BS2 and closing a contact t2 in a switch CS3 so as to stop charging the condenser 4, so that power is supplied to the light emitting element 5 from the condenser 4. Here the capacitance of the condenser 4 is made up enough to supply power to the light emitting element 5 for a period longer than the time necessary for heater, etc., 1 to fall its temperature low enough to prevent a risk of burn.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to an alarm device for preventing burns when the heater of a cooking appliance or the top plate heated by the heater is at a high temperature even if it is not red hot. As kitchen electrification progresses, cooking appliances such as electric stoves that have multiple heating parts are becoming more widespread.The heating parts of these types of cooking appliances are heated with sheathed heaters or halogen lamps, etc. Even if the heater is made of a ceramic top plate (hereinafter referred to as a heater, etc.), it emits red heat or brilliance when the power is on, making it visible that it is at a high temperature. If you accidentally touch your hands, you may get burned. In order to solve this problem, Japanese Utility Model Application No. 58-21993 was published.
Alternatively, although an alarm device as shown in Japanese Patent Application Laid-open No. 73879/1983 has been proposed, all of these conventional alarm devices use temperature detection means such as a thermostat to lower the temperature of the heater to a safe temperature that will not cause burns. Problems to be Solved by the Invention The present invention aims to solve the following problems: In a temperature alarm device for a heating cooker using such a conventional temperature detection means, temperature detection means It is difficult to attach the alarm directly to a heater, etc., and it is attached to a part that is correlated to the temperature of the heater, etc., so it is uncertain in terms of the meaning of the alarm. = In this type of heating cooker (Part 1: Safety Aspects) Power outages are often performed using a so-called double-off switch that switches the power line.b~ When the power is cut off in this way, the indicator lamp goes out. Therefore, from this point of view, the alarm is uncertain.9 The present invention solves the above problem, and the indicator lamp is turned on until the power is cut off and the temperature of the L heater, etc. falls to a safe temperature. In order to achieve the above object, the present invention provides a first means for achieving the above object. Alternatively, a top plate heated by a heater, an energization detection means for detecting energization/disconnection of the heater, an electric double layer capacitor that stores electricity when the heater is energized, and light is emitted by supplying power from the electric double layer capacitor. and a light emitting element, and is configured to supply power from the electric double layer capacitor to the light emitting element when the electricity supply detection means detects a disconnection of electricity to the heater.The second means is heated by a heater or a heater. a top plate, and a cooking container detecting means for detecting detachment of the heater or the cooking container placed on the top plate; Consisting of two electric double layer capacitors that store electricity and two light emitting elements that emit light when supplied with power from the electric double layer capacitors,
When the cooking container detecting means detects detachment of the cooking container while the heater is energized, power is supplied to one of the light emitting elements from one of the electric double layer capacitors for the predetermined period of time.
After the predetermined time has elapsed, power is supplied to the other one of the light emitting elements from another one of the electric double layer capacitors.Third Means 41: Supplying power from the electric double layer capacitor to the light emitting element. (Companion) The electric double layer capacitor is configured so that power is supplied until the total amount of charge is discharged and for a predetermined alarm time. By detecting electricity, it is possible to supply electricity from the electric double layer capacitor to the light emitting element until the total amount of electricity is discharged or for a predetermined alarm time.Also, the cooking container detection means detects detachment of the cooking container while the heater, etc. is energized. Then, power is supplied to one of the light emitting elements from one of the electric double layer capacitors for a predetermined period of time, and after the elapse of a predetermined period of time, the entire stored power is discharged from the other one of the electric double layer capacitors to the other one of the light emitting elements. until
It is also possible to supply power for a predetermined alarm time.In supplying power from this electric double layer capacitor to the light emitting element,
Electric double layer capacitors have a large amount of electricity stored per volume and can supply power for a long time to the light emitting current of the light emitting element.
Even after the power to the heater, etc. is cut off or the power is cut off, power is continued to be supplied to the light emitting element until the temperature of the heater, etc. drops to a safe temperature, and the light emitting element can be turned on. An embodiment of the invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows an embodiment of the first means, and as shown in the figure, the heater, etc. 1 is connected via the switch AS+. Even if the AC/DC converter 3 is connected to the power source 2 via the switch BS2 in parallel with the heater etc. 1, the AC/DC converter 3 is connected to the electric double layer via the terminal t1 of the switch C83. Even if the capacitor (hereinafter referred to as a capacitor) 4 is connected, even if the light emitting element 5 is connected to the capacitor 4 via the terminal t2 of the switch C83, the switch As+l*, the switch BS2, and the switch CSs are linked, and the switch AS+ When is open, switch B
Aiming at S2, the switch C8s operates so that the terminal t2 is closed, and when the switch AS+ is closed, the switch BS2 is turned on, and the switch C8s is interlocked so that the terminal t1 is closed.Then, the switch AS+, switch BS2, and switch C3s are activated. Even if the energization detection means is configured, in the above configuration, when the switch AS+ is closed, the heater etc. 1 is energized and ripened.
S2 and switch C3s are interlocked, so switch BS2
Switch C88 closes terminal 1+.As a result, AC from power source 2 is converted to DC by AC/DC converter 3 and stored in capacitor 4.When cooking by heater etc. 1 is finished, switch AS+ is opened. When power is turned off to heater etc. 1, switch B interlocks with switch A S +.
S2 is an open ridge. Switch C3s closes terminal t2. As a result, current to capacitor 4 is stopped, and power is supplied from capacitor 4 to light emitting element 5, causing light emitting element 5 to emit light.
Here, the storage capacity of the capacitor 4 is set to a capacity that can supply power to the light-emitting element 5 for at least the time required for the heater, etc. 1 to drop from its highest temperature to a temperature that will not cause burns if touched. The electric double layer capacitor is the most suitable capacitor with this E'
w As soon as the power to the heater etc. 1 is stopped, the light emitting element 5
emits light to warn the user that if he touches the heater, etc. 1 while it is in a scorching state, he will get burned.Then, when the entire charge in the capacitor 4 is discharged and the light emitting element 5 stops emitting light, the cAL heater A temperature of 1 indicates that the temperature has fallen to a level that will not cause burns if touched, so the reliability of safety is high.4 Switch C
Between the terminal t2 of 83 and the light emitting element 5, a timer means 6 is interposed to supply power from the capacitor 4 to the light emitting element 5 for a predetermined alarm time, and after stopping power supply to the heater etc. 1, light is emitted from the capacitor 4 for a predetermined alarm time. It is also possible to supply power to the element 5. This predetermined alarm time (i.e., the time required for the heater, etc. 1 to drop from its highest temperature to a temperature that will not cause burns if touched, taking into account the season, installation conditions, etc.) Next, an embodiment of the second means is shown in Fig. 2.The same parts as those shown in Fig. 1 are given the same reference numerals and their explanations are omitted. As shown, terminal t3 of switch DS4 is connected between AC/DC converter 3 and switch C32.
Even if the first capacitor 7 is connected to the first capacitor 7 via the terminal t4 of the switch DS4, the first light emitting element 8 is connected to the first capacitor 7 via the terminal t4 of the switch DS4. etc. 1, so that when a cooking container is detected, the terminal ts is closed, and when no cooking container is detected, the terminal t4 is closed. Interlocking I! to the first capacitor 7! Even if a voltage detection sensor 10 for detecting the voltage of the first capacitor 7 is interposed, this voltage detection sensor 10 interlocks the switch AS+ so that the voltage of the first capacitor 7 becomes necessary for the first light emitting element 8 to emit light. When the voltage drops below the voltage, the switch AS+ is opened. In this embodiment, the voltage detection sensor 10 and the cooking container detection sensor 9 may constitute a cooking container detection means.
to the second capacitor 4, and the light emitting element 5 to the second light emitting element 5.
In the above configuration, when a cooking container is placed on heater etc. 1 and switch ASI is closed, heater etc. 1 is energized and ripens.At this time, switch AS+, switch BSa, and switch C3a are interlocked, so The switch BS2 is closed, and the switch C3t closes the terminal t1. This causes the AC from the power source 2 to be converted to DC by the AC/DC converter 3 and stored in the second capacitor 4. At the same time, the cooking container detection sensor 9 When the cooking container placed on the heater etc. 1 is detected, the switch DS closes the terminal t3. As a result, the first capacitor 7 is also charged.
When cooking is finished and the cooking container is removed from the heater etc. 1 while it is closed due to forgetting to turn off the switch AS+, the cooking container detection sensor 9 detects the removal of the cooking container and closes the terminal t4 of the switch DS4. The storage of electricity in the first capacitor 7 is stopped, and power is supplied from the first capacitor 7 to the first light emitting element 8, which causes the first light emitting element 8 to emit light. The switch AS+ is set to a capacity that can supply power to the first light emitting element 8 for a predetermined period of time to automatically open the switch AS+ after a predetermined period of time.
When the first capacitor 7 supplies power to the first light emitting element 8 and its voltage drops below the light emitting voltage of the first light emitting element 8, the voltage detection sensor 10 detects the voltage and switches the switch A.
Open S+. As a result, the power supply to the heater etc. 1 is stopped, and an alarm to prevent burns is displayed from the first light emitting element 8 during that time. Similarly, an alarm is displayed by the light emission of the second light emitting element 4. In this way, the temperature alarm device for the heating cooker according to the embodiment of the present invention
When the electricity detection means detects a power cut to the heater, etc. 1, power is supplied from the capacitor 4 to the light emitting element 5, and an alarm is displayed by the light emitted from the light emitting element 5, which has the effect of preventing burns. The container detection means is a heater etc. 1
When the detachment of the cooking container is detected while the current is being energized, power is supplied from the first capacitor 7 to the first light emitting element 8 for a predetermined time, and power to the heater etc. 1 is stopped.After a predetermined time has elapsed, the second capacitor 7
Power is supplied from the capacitor 4 to the second light emitting element 5.
Since the second light emitting element 8.5 emits light to display an alarm, the present invention has the effect that burns can be prevented. Power can be supplied until the entire amount of stored power is discharged from the electric double layer capacitor to the light emitting element by detecting a power cut to the heater, etc. of the power supply detection means, or for a predetermined alarm time a
If the cooking container detecting means detects that the cooking container is removed while the heater, etc. is energized, power is supplied to one of the light emitting elements from one of the electric double layer capacitors for a predetermined period of time. After a predetermined period of time has elapsed, power can be supplied to the other one of the light-emitting elements from the other electric double-layer capacitor until the entire charge is discharged, or for a predetermined alarm time. When supplying power to light-emitting elements, electric double-layer capacitors have a large amount of electricity stored per volume, and can supply power for a long time to the light-emitting current of the light-emitting element. Since the light-emitting element continues to be supplied with power until the temperature of the heater, etc. drops to a safe temperature, the light-emitting element can emit light, making it possible to provide a highly safe and reliable temperature warning device for cooking appliances

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of a temperature alarm device for a heating cooker according to a first embodiment of the present invention. FIG. 2 is a block circuit diagram of a temperature alarm device for a heating cooker according to a second embodiment of the present invention. ... Heater capacitor 4, 7 ... Electric double layer capacitor, 5, 8 ... Light emitting element, 6 ... Timer handshake 9 ... Cooking container detection sensor (cooking container detection means) ), 10...Voltage detection sensor (cooking container detection means), Sl...Switch A (current detection means), S2...
... Switch B (energization detection means), Ss... Switch C (energization detection means).

Claims (3)

[Claims] (1) A heater or a top plate heated by the heater, an energization detection means for detecting energization/de-energization of the heater, an electric double layer capacitor that stores electricity when the heater is energized, and a top plate heated by the heater; A temperature alarm device for a heating cooker, comprising a light emitting element that emits light when supplied with electricity, and supplying power from the electric double layer capacitor to the light emitting element when the electricity supply detection means detects a power failure to the heater. (2) A heater or a top plate heated by the heater, and a cooking container that detects detachment of the cooking container placed on the heater or top plate and shuts off power to the heater after a predetermined time from the time of detachment of the cooking container. It consists of a detection means, two electric double-layer capacitors that store electricity when the heater is energized, and two light-emitting elements that emit light when powered by the electric double-layer capacitor, and the cooking container detection means is configured to detect when the heater is energized. When detachment of the cooking container is detected, power is supplied to one of the light emitting elements from one of the electric double layer capacitors for the predetermined time, and after the elapse of the predetermined time, the electricity is supplied to the other one of the light emitting elements. A temperature alarm device for a heating cooker that is powered by another one of the double layer capacitors. (3) Power supply from the electric double layer capacitor to the light emitting element is as follows:
3. The temperature alarm device for a heating cooker according to claim 1, wherein power is supplied until the total amount of electricity stored in the electric double layer capacitor is discharged or for a predetermined alarm time.