JP2011141054A - Shutoff device for electrical equipment and cooker including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shutoff device of electrical equipment enhanced in safety. <P>SOLUTION: When a temperature attributable to an upper heater 109 or a lower heater 137 exceeds a first set temperature, a first thermostat 171 shuts off current carrying to a steam generation heater 24, the upper heater 109 and the lower heater 137. When a temperature of the steam generation heater 24 exceeds a second set temperature, a second thermostat 172 shuts off current carrying to the steam generation heater 24, the upper heater 109 and the lower heater 137. When a signal to turn on an upper heater relay 156 and a lower heater relay 157 is not output, if a control device 100 determines that an interior temperature detected by a first thermistor 151 increases, the control device 100 turns on a steam generation heater relay 155 to make the second thermostat 172 perform shutoff operation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrical device shut-off device used for an electrical device such as a heating cooker, a copying apparatus, a toilet seat device, and an electric carpet.

  Conventionally, as an electric device, there is an electric carpet disclosed in Japanese Unexamined Patent Publication No. 1-131829 (Patent Document 1). The electric carpet includes a plurality of heaters that can be controlled independently, and a shut-off device that cuts off power to the plurality of heaters. A switch for controlling on / off of each heater is connected to one end of each heater.

  When detecting the welding state of the switch, the breaker blows a fuse between the other end of each heater and the power source. This prevents the plurality of heaters from being overheated.

  However, the conventional breaker described above has a problem that the time from when the switch is welded to when the fuse is blown is not sufficiently short, and safety is not high.

Japanese Patent Laid-Open No. 1-131829

  Then, the subject of this invention is providing the interruption | blocking device of the electric equipment which can make safety high.

  Moreover, the other subject of this invention is providing the heating cooker provided with the interruption | blocking apparatus of the said electric equipment.

In order to solve the above-described problem, the electrical device shut-off device of the present invention includes:
A plurality of switches connected to the plurality of heat sources so as to turn on and off the plurality of heat sources respectively;
A control device for controlling on / off of the plurality of switches;
When the temperature caused by the first heat source that is one of the plurality of heat sources is equal to or higher than the first set temperature, a first energization interruption unit that interrupts energization of all the heat sources;
When the temperature caused by the second heat source that is the other one of the plurality of heat sources is equal to or higher than the second set temperature, a second energization interrupting unit that interrupts energization to all the heat sources;
A temperature sensor for detecting a temperature caused by the first heat source,
When the control device determines that the temperature due to the first heat source detected by the temperature sensor is rising when a signal for turning on the switch of the first heat source is not output. The switch of the second heat source is turned on to cause the second energization cutoff unit to perform a cutoff operation.

  According to the electrical apparatus shut-off device having the above-described configuration, when the control device does not output a signal for turning on the switch of the first heat source, the temperature caused by the first heat source detected by the temperature sensor is low. When it is determined that it is rising, the second heat source switch is turned on and the second energization interruption unit is made to perform the interruption operation. Therefore, before the first energization interruption unit interrupts the energization to all the heat sources, A 2nd electricity supply interruption | blocking part interrupts | blocks the electricity supply to all the heat sources rapidly.

  Therefore, even if the first heat source generates heat due to the welding of the switch, the energization to all the heat sources can be cut off in a short time from the heat generation, thereby improving safety.

In the electrical apparatus shut-off device of one embodiment,
The second set temperature is lower than the first set temperature.

  According to the electrical apparatus cutoff device of the embodiment, since the second set temperature is lower than the first set temperature, it is possible to shorten the time required for the second energization cutoff unit to perform the cutoff operation.

In the electrical device shut-off device of one embodiment,
When the control device does not output a signal for turning on the switch of the first heat source immediately after the electric device is turned on, the temperature caused by the first heat source detected by the temperature sensor is When it is determined that the temperature has risen, the switch of the second heat source is turned on to cause the second energization cutoff unit to perform a cutoff operation.

  According to the electrical device shut-off device of the embodiment, the control device detects the temperature sensor when it does not output a signal for turning on the switch of the first heat source immediately after turning on the electrical device. When it is determined that the temperature due to the first heat source is rising, the second heat source is turned on to cause the second energization interrupting section to shut off, so that the safety after turning on the power is increased. Can do.

In the electrical device shut-off device of one embodiment,
When the control device determines that the temperature caused by the first heat source detected by the temperature sensor is rising when the signal for turning on the switch of the first heat source is not output, The switches of all the other heat sources as well as the switches of the second heat source were turned on to cause the second energization cut-off section to cut off.

  According to the electrical apparatus shut-off device of the above embodiment, when the control device does not output a signal for turning on the switch of the first heat source, the temperature caused by the first heat source detected by the temperature sensor is low. If it is determined that it has risen, all the other heat source switches are turned on together with the second heat source switch so that the second energization interrupting unit is operated to shut off. It is possible to shorten the time required for.

  The heating cooker of the present invention is characterized by including the electrical device shut-off device of the present invention.

  According to the cooking device of the said structure, since the interruption | blocking apparatus of the said electric equipment is provided, a user can be provided with a sense of security.

  In the electrical apparatus shut-off device according to the present invention, when the control device does not output a signal for turning on the switch of the first heat source, the temperature caused by the first heat source detected by the temperature sensor increases. If it is determined that the second heat source is turned on, the second energization cut-off unit causes the second energization cut-off unit to perform the cut-off operation. Therefore, before the first energization cut-off unit cuts off the energization to all the heat sources, The shut-off unit can shut off energization to all the heat sources.

  Therefore, even if the first heat source generates heat due to the welding of the switch, the energization to all the heat sources can be cut off in a short time from the heat generation, thereby improving safety.

  Since the heating cooker of the present invention includes the above-described electrical device shut-off device, it can give the user a sense of security.

FIG. 1 is a schematic front view of a heating cooker according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of the heating cooker as viewed from the front and obliquely above. FIG. 3 is a schematic perspective view of the heating cooker as viewed from the rear and obliquely above. FIG. 4 is a schematic perspective view of the heating cooker viewed from the side. FIG. 5 is a schematic perspective view of the heating cooker as viewed from the front and obliquely above. 6 is a schematic cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a control block diagram of the cooking device. FIG. 8 is a circuit diagram of the main part of the cooking device. FIG. 9 is a flowchart for explaining the control operation of the control device for the heating cooker. FIG. 10 is a flowchart for explaining another control operation of the heating cooker control apparatus.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electrical device shut-off device according to the present invention will be described in detail with reference to the illustrated embodiments. In the following description, the opening 8a side of the heating chamber 8 is referred to as “front side”, and the side opposite to the opening 8a side is referred to as “rear side”.

  FIG. 1 is a schematic front view of a heating cooker according to an embodiment of the present invention.

  The cooking device includes a casing 1 and a sliding door 2 with a handle that is attached to the front side of the casing 1. An operation panel 3 is provided on the front side of the casing 1 so as to be adjacent to the door 2 with a handle when closed. A dew receiver 4 is disposed below the operation panel 3.

  The door 2 with a handle is provided so as to be movable in the front-rear direction with respect to a heating chamber 8 described later. A handle portion 51 is integrally attached to the front surface of the door 2 with the handle. And the transparent heat-resistant glass 52 is attached to the front surface of the door 2 with a handle so that it may be located above the handle part 51.

  A dial 5 is rotatably attached to the operation panel 3. Further, the operation panel 3 has a liquid crystal display unit 7, and the liquid crystal display unit 7 performs display according to the operation of the dial 5.

  The dew receptacle 4 is a container that can be attached to and detached from the two front legs 6 and 6. The front legs 6 and 6 are provided on the front side of the bottom of the casing 1. When the dew receptacle 4 is attached to the front legs 6, 6, a part of the dew receptacle 4 is positioned below the rear surface (surface on the casing 1 side) of the door 2 with a handle when closed.

  FIG. 2 is a schematic perspective view of the heating cooker from which the top and both sides of the casing 1 are removed as viewed from the front obliquely upward. Moreover, FIG. 3 is the schematic perspective view which looked at the heating cooker of FIG. 2 from back diagonally upward.

  In the casing 1, as shown in FIGS. 2 and 3, a heating chamber 8 that houses an object to be heated such as fish or meat is installed. In the casing 1, a space on the side of the heating chamber 8 and behind the operation panel 3 is an electrical component chamber 9, and a space behind the heating chamber 8 and behind the electrical component chamber 9 is an intake space 10. That is, the electrical component chamber 9 is provided on one side of the casing 1, while the intake space 10 is provided on the rear side of the casing 1. Further, on the rear surface of the casing 1, opaque containers 101A and 101B having a substantially container shape are detachably attached. The height of the spacer 101 </ b> A with respect to the rear surface of the casing 1 is substantially the same as the height of the spacer 101 </ b> B with respect to the rear surface of the casing 1.

  The heating chamber 8 has an opening 8a (see FIG. 5) on the front side, and the door 2 with a handle opens and closes the opening 8a. The object to be heated is placed on a tray 40 which will be described later, and passes through the opening 8a of the heating chamber 8 together with the tray. Further, heat shield plates 11, 11,... Are arranged above, below, behind and on both sides of the heating chamber 8. That is, the heat shield plates 11, 11,... Are arranged around the heating chamber 8 except for the opening 8 a. Although not shown, the space between the heat shield plate 11 and the heating chamber 8 is filled with a heat insulating material. The gas in the heating chamber 8 is guided to the front side of the casing 1 through the exhaust path 12 and is exhausted from the front side of the casing 1 to the outside of the casing 1.

  In the electrical component chamber 9, a steam generator 13 for generating saturated steam, a water supply pump 14 connected to the steam generator 13 via a water supply tube 20, and a front of the water supply pump 14 are arranged. There is a tank storage section 15. When the object to be heated is heated, air from the cooling fan 16 flows through the electrical component chamber 9 so that electrical components such as the water supply pump 14 can be cooled.

  The intake space 10 is a space through which air around the rear side of the casing 1 flows from the four intake ports 17A, 17B, 17C, and 17D when the cooling fan 16 is driven. The air in the intake space 10 is sucked into the cooling fan 16 and blown out into the electrical component chamber 9. The intake ports 17A, 17B, 17C, and 17D are each configured by a plurality of slits provided at the rear portion of the casing 1.

  The exhaust path 12 includes a flexible synthetic resin exhaust tube 18 and a non-flexible synthetic resin exhaust duct 19 disposed on the side of the tank housing 15.

  The exhaust tube 18 is installed so as to extend from the upper rear side to the lower front side of the electrical component chamber 9. The rear end portion of the exhaust tube 18 is connected to the rear portion of the heating chamber 8, while the front end portion of the exhaust tube 18 is connected to the exhaust duct 19.

  The rear end of the exhaust duct 19 is open so that air from the cooling fan 16 flows into the exhaust duct 19. The gas from the inside of the heating chamber 8 is mixed with the air from the cooling fan 16 and the temperature is lowered.

  2 and 3 denotes a partition wall that partitions the electrical component chamber 9 and the intake space 10. A cooling fan 16 is attached to the partition wall 21.

  FIG. 4 is a schematic view of the cooking device of FIG. 2 as viewed from the side.

  An exhaust / drain port 22 is provided at the bottom of the front side of the exhaust duct 19. The exhaust / drain port 22 passes through the bottom of the casing 1 and faces the dew receiver 4. Further, the exhaust duct 19 has a front end portion of the exhaust tube 18, and the opening of the front end portion of the exhaust tube 18 faces the exhaust and drain port 22 side. Condensed water generated in the exhaust tube 18 and the exhaust duct 19 can be drained to the dew receptacle 4 through the exhaust / drain port 22.

  FIG. 5 is a schematic perspective view showing a state where the handle-equipped door 2 is pulled out in FIG.

  The tank storage unit 15 stores a water supply tank 23. When the door 2 with the handle is pulled out, the front end of the water supply tank 23 is exposed, so that the user can take out the water supply tank 23 from the tank storage unit 15. Further, when the door with handle 2 is pulled out, the tray 40 is also pulled out from the heating chamber 8.

  The water in the water supply tank 23 is supplied to the steam generator 13 through the water supply tube 20 by driving the water supply pump 14. The steam generator 13 heats water from the feed water pump 14 with a steam generating heater 24 (see FIG. 4) to generate saturated steam. The steam generating heater 24 is an example of a second heat source.

  When viewed from the electrical component room 9 side, the steam generating heater 24 has a shape in which a U-shape is rotated 90 degrees clockwise. Most of the steam generating heater 24 is embedded in the wall portion of the steam generating device 13.

  Below the tray 40 is a tray holder 44 that detachably holds the tray 40. The tray holder 44 is formed by bending a metal wire into a predetermined shape. And the front-end part of the tray holder 44 is attached to the rear surface of the door 2 with a handle so that attachment or detachment is possible. Thereby, the tray 40 can move in the front-rear direction together with the door 2 with the handle.

  The handle-equipped door 2 slides in the front-rear direction by a pair of rail units 112A and 112B (only the rail unit 112A appears in FIG. 5), and opens and closes the opening 8a of the heating chamber 8.

  FIG. 6 is a schematic cross-sectional view taken along line VI-VI in FIG. In FIG. 6, illustration of some members and devices in the casing 1 is omitted.

  On the heating chamber 8, there is provided an upper heater housing portion 108 for heating the inside of the heating chamber 8 from the upper side and generating superheated steam. On the other hand, a lower heater storage 136 for heating the inside of the heating chamber 8 from below is provided under the heating chamber 8.

  In the upper heater storage section 108, an upper heater 109 made of, for example, a sheathed heater is stored. The saturated water vapor generated by the steam generator 13 is blown into the upper heater housing portion 108 through the steam supply pipe 106 and is heated by the upper heater 109 to become superheated water vapor. This superheated steam is jetted downward into the heating chamber 8 from a plurality of steam outlets 111 provided on the top panel 110 of the heating chamber 8 to heat the objects to be heated on the tray 40. When the saturated steam from the steam generator 13 is not heated by the upper heater 109, the saturated steam heats the object to be heated. Further, the object to be heated can be heated by the radiant heat of the upper heater 109. Here, the said superheated steam means the steam heated to the overheated state of 100 degreeC or more. The upper heater 109 is an example of a first heat source.

  The top panel 110 functions as a partition wall that separates the space in the upper heater housing portion 108 from the space in the heating chamber 8, and radiates heat to the object to be heated in the heating chamber 8 by being heated by the upper heater 109. It also functions as a radiation plate that irradiates.

  A lower heater 137 made of, for example, a sheathed heater is accommodated in the lower heater accommodating portion 136. The lower heater 137 is completely covered with the bottom panel 138 of the heating chamber 8 and is not exposed to the space in the heating chamber 8. Thereby, even if the oil etc. which came out of the said to-be-heated material dripped, the oil etc. do not adhere to the lower heater 137, and can prevent the smoke generation and the ignition resulting from the adhesion. Further, the lower heater 137 can be prevented from being contaminated with the oil or the like. The lower heater 137 is an example of a first heat source.

  The bottom panel 138 functions as a partition wall that separates the space in the lower heater housing portion 136 from the space in the heating chamber 8, and is heated by the lower heater 137 to radiate heat to an object to be heated in the heating chamber 8. It also functions as a radiation plate for irradiation.

  The rail units 112A and 112B are connected to each other by a plate-like member 47. In a state where the tray 40 is placed in the heating chamber 8, that is, in a state where the opening 8 a of the heating chamber 8 is closed, the plate-like member 47 faces the lower heater storage portion 136.

  FIG. 7 is a control block diagram of the cooking device.

  The cooking device includes a control device 100 including a microcomputer and an input / output circuit. The control device 100 is a liquid crystal display based on an operation input signal from the operation panel 3 and detection signals from the tank water level sensor 149, the door opening / closing sensor 150, the first thermistor 151, the second thermistor 152, and the third thermistor 153. The display unit 7, the steam generating heater relay 155, the upper heater relay 156, the lower heater relay 157, the water supply pump relay 158, the cooling fan relay 159, and the power saving relay 160 are controlled on and off. The first thermistor 151 is an example of a temperature sensor. Steam generating heater relay 155, upper heater relay 156, and lower heater relay 157 are examples of switches.

  The first thermistor 151 is attached to the heating chamber 8 and detects the internal temperature. That is, the first thermistor 151 indirectly detects the upper heater 109 and the lower heater 137. The second thermistor 152 detects the temperature of the steam generating heater 24, and the third thermistor 153 detects the temperature of the cooling fan 16. Detection signals indicating these temperatures are input to the control device 100.

  When the power saving relay 160 is turned off, the microcomputer of the control device 100 stops.

  FIG. 8 is a circuit diagram of the main part of the cooking device.

  The cooking device includes a relay board 154, a first thermostat 171 and a second thermostat 172. In addition, the 1st thermostat 171 is an example of a 1st electricity supply interruption | blocking part, and the 2nd thermostat 172 is an example of a 2nd electricity supply interruption | blocking part.

  The relay board 154 is provided with a steam generating heater relay 155, an upper heater relay 156, a lower heater relay 157, a water supply pump relay 158, a fan relay 159, a power saving relay 160, a first current fuse 161 and a second current fuse 162. It has been. The tank water level sensor 149, the first thermistor 151, the second thermistor 152, the third thermistor 153, and the door switch 163 are connected to the control device 100 via the relay board 154.

  One end of the steam generating heater relay 155, the upper heater relay 156, and the lower heater relay 157 is connected to one end of the steam generating heater 24, the upper heater 109, and the lower heater 137. The other ends of the steam generating heater 24, the upper heater 109, and the lower heater 137 are connected to one end of the first thermostat 171. On the other hand, the other end of the heater relay 155 for steam generation is connectable between one end of the power saving relay 160 and one end of the first current fuse 161 via a door switch 166. The other ends of the upper heater relay 156 and the lower heater relay 157 are connected between one end of the power saving relay 160 and one end of the first current fuse 161. Further, between one end of the power saving relay 160 and one end of the first current fuse 161 is connected to one end of the first thermostat 171 via the second current fuse 162. The other end of the power saving relay 160 is connected to one end of the second thermostat 172.

  One ends of the water supply pump relay 158 and the cooling fan relay 159 are connected to the water supply pump 14 and the cooling fan 16. The water supply pump 14 and the cooling fan 16 are also connected between one end of the power saving relay 160 and one end of the first current fuse 161. On the other hand, the other ends of the lower heater relay 157 and the water supply pump relay 158 are connected to one end of the first thermostat 171.

  The door switch 166 is switched according to the opening / closing of the door 2 with a handle. More specifically, the door switch 166 connects the other end of the steam generating heater relay 155 between one end of the power saving relay 160 and one end of the first current fuse 161 when the door 2 with a handle is opened. On the other hand, when the door 2 with the handle is closed, the other end of the steam generating heater relay 155 is connected between one end of the power saving relay 160 and one end of the first current fuse 161.

  When the internal temperature detected by the first thermistor 151 becomes equal to or higher than a preset first set temperature (for example, 220 ° C.), the first thermostat 171 moves to the steam generating heater 24, the upper heater 109, and the lower heater 137. It is designed to cut off the power supply. The other end of the first thermostat 171 is connected to the power plug 173.

  When the internal temperature detected by the first thermistor 151 becomes equal to or higher than a preset second temperature (for example, 120 ° C. lower than the first set temperature), the second thermostat 172 The power supply to the heater 109 and the lower heater 137 is cut off. The other end of the second thermostat 172 is connected to the power plug 173.

  FIG. 9 is a flowchart for explaining the control operation of the control device 100. The control operation of the control device 100 will be described below with reference to FIG.

  In the control operation of the control device 100, first, in step S101, it is determined whether or not the steam generation heater relay 155, the upper heater relay 156, and the lower heater relay 157 are turned off to finish heating the object to be heated. . This step S101 is repeated until it is determined that the heating of the object to be heated has been completed.

  Next, in step S102, the first thermistor 151 detects the internal temperature TH0 and starts measuring elapsed time.

  Next, in step S103, it is determined whether the door 2 with a handle is opened. This step S103 is repeated until it is determined that the door 2 with the handle is opened.

  Next, in step S104, it is determined whether the door 2 with a handle is closed. Similar to step S103, step S104 is also repeated until it is determined that the door 2 with handle is closed.

Next, in step S105, when the elapsed time from the detection of the internal temperature TH0 is T1, the internal temperature TH1 is detected by the first thermistor 151. Here, the elapsed time T1 is obtained by the following equation.
T1 (seconds) = [door opening / closing time (seconds)] × 2 + 30 (seconds)
Door opening and closing time: Time from when the door 2 with handle is opened until it is closed

  Next, in step S106, it is determined whether the internal temperature TH1 is lower than the internal temperature TH0. When this determination is made, a signal for turning on the upper heater relay 156 and the lower heater relay 157 is not output. Then, if the internal temperature TH1 is lower than the internal temperature TH0, the possibility that the upper heater relay 156 or the lower heater relay 157 is welded is low, but if the internal temperature TH1 is not lower than the internal temperature TH0, The possibility that the heater relay 156 or the lower heater relay 157 is welded is high. Therefore, when it is determined in step S106 that the internal temperature TH1 is lower than the internal temperature TH0, the process proceeds to step S107, and the control operation at the time of non-welding of the upper heater relay 156 and the lower heater relay 157 is performed. On the other hand, if it is determined in step S106 that the internal temperature TH1 is not lower than the internal temperature TH0, the process proceeds to step S111, and the control operation during welding of the upper heater relay 156 and the lower heater relay 157 is performed.

  When the process proceeds to step S107, it is determined from step S106 whether a preset elapsed time T2 has elapsed. This step S107 is repeated until it is determined that the elapsed time T2 has elapsed.

  Next, in step S108, the power saving relay 160 is turned off, and the control operation ends.

  On the other hand, when it progresses to said step S111, the cooling fan relay 159 is turned off. If the cooling fan relay 159 has already been turned off when performing this step 111, the cooling fan relay 159 is prevented from being turned on.

  Next, in step S112, the steam generating heater relay 155 is turned on, and the control operation ends.

  As described above, when the control device 100 does not output a signal for turning on the upper heater relay 156 and the lower heater relay 157, the internal temperature detected by the first thermistor 151 is increased. When the determination is made, the steam relay heater 155 is turned on to cause the second thermostat 172 to perform the shut-off operation, so that the shut-off operation of the second thermostat 172 is obtained before the shut-off operation of the first thermostat 171.

  Therefore, even if the upper heater 109 and the lower heater 137 generate heat by welding the upper heater relay 156 and the lower heater relay 157, the steam generating heater 24, the upper heater 109, and the lower heater 137 are heated in a short time from the generated heat. It is possible to increase the safety by shutting off the power supply to the.

  In addition, since the second set temperature is lower than the first set temperature, the time required for the second thermostat 172 to perform the shut-off operation can be shortened.

  Further, when the possibility of welding of the upper heater relay 156 or the lower heater relay 157 is high, the cooling fan relay 159 is prevented from being turned on in step S111, so that the temperature increase rate of the steam generating heater 24 is increased. .

  Therefore, the shut-off operation of the second thermostat 172 can be made faster than performing step S112 with the cooling fan relay 159 turned on.

  In the above embodiment, it is determined whether the upper heater relay 156 or the lower heater relay 157 is welded after the heated object is finished. However, this determination may be performed immediately after the heating cooker is turned on. . The power of the cooking device is turned on when the door 2 with the handle is opened after the power plug 173 is inserted into the outlet.

  When determining whether or not the upper heater relay 156 or the lower heater relay 157 is welded immediately after the heating cooker is turned on, first, in step S201, the first thermistor 151 stores the container as shown in FIG. While detecting the internal temperature TH0, the measurement of elapsed time is started.

  Next, in step S202, it is determined whether the door 2 with a handle is closed. This step S202 is repeated until it is determined that the handle-equipped door 2 is closed.

Next, in step S203, when the elapsed time from the detection of the internal temperature TH0 is T1, the internal temperature TH1 is detected by the first thermistor 151. Here, the time T1 is obtained by the following equation.
T1 (seconds) = [door opening / closing time (seconds)] × 2 + 30 (seconds)
Door opening and closing time: Time from when the door 2 with handle is opened until it is closed

  Next, in step S204, it is determined whether the internal temperature TH1 is lower than the internal temperature TH0. When this determination is made, a signal for turning on the upper heater relay 156 and the lower heater relay 157 is not output. Then, if the internal temperature TH1 is lower than the internal temperature TH0, the possibility that the upper heater relay 156 or the lower heater relay 157 is welded is low, but if the internal temperature TH1 is not lower than the internal temperature TH0, The possibility that the heater relay 156 or the lower heater relay 157 is welded is high. Therefore, if it is determined in step S204 that the internal temperature TH1 is lower than the internal temperature TH0, the process proceeds to step S205, and the control operation when the upper heater relay 156 and the lower heater relay 157 are not welded is performed. On the other hand, if it is determined in step S204 that the internal temperature TH1 is not lower than the internal temperature TH0, the process proceeds to step S211, and the control operation during welding of the upper heater relay 156 and the lower heater relay 157 is performed.

  When the process proceeds to step S205, it is determined from step S204 whether a preset elapsed time T2 has elapsed. This step S205 is repeated until it is determined that the elapsed time T2 has elapsed.

  Next, in step S206, the power saving relay 160 is turned off and the control operation ends.

  On the other hand, when the process proceeds to step S211, the cooling fan relay 159 is turned off. If the cooling fan relay 159 has already been turned off when performing this step 211, the cooling fan relay 159 is prevented from being turned on.

  Next, in step S212, the steam generating heater relay 155 is turned on, and the control operation ends.

  By such a control operation, even if the upper heater relay 156 or the lower heater relay 157 is welded immediately after the power is turned on, the steam generating heater 24, the upper heater 109, and the By energizing the lower heater 137, the safety immediately after the power is turned on can be increased.

  In the above embodiment, when it is determined that the possibility of welding the upper heater relay 156 or the lower heater relay 157 is high, only the steam generating heater relay 155 is turned on, but the steam generating heater relay 155, the upper heater relay 155 All of 156 and lower heater relay 157 may be turned on. In this case, the time required for the second thermostat 172 to perform the shut-off operation can be shortened.

  In the above embodiment, a heat source other than the steam generating heater 24, the upper heater 109, and the lower heater 137 may be provided in the casing 1. If it is determined that the possibility of welding the upper heater relay 156 or the lower heater relay 157 is high, the relay of the heat source may be turned on together with the upper heater relay 156 and the lower heater relay 157. Also in this case, the time required for the second thermostat 172 to perform the shut-off operation can be shortened.

  In the above embodiment, the second set temperature is lower than the first set temperature. However, the second set temperature is the same temperature as the first set temperature, or the second set temperature is higher than the first set temperature. It may be at temperature.

  Examples of the heating cooker of the present invention include not only an oven that uses superheated steam, but also an oven that does not use superheated steam, an oven range that uses superheated steam, and an oven range that does not use superheated steam.

  In the cooking device of the present invention, healthy cooking is performed by using superheated steam or saturated steam in cooking heaters (including those using an electric stove or gas stove such as an IH heater or electric heater) or a microwave oven. Can do. For example, in the cooking device of the present invention, superheated steam or saturated steam having a temperature of 100 ° C. or higher is supplied to the food surface, and the superheated steam or saturated steam adhered to the food surface is condensed to give a large amount of condensation latent heat to the food. So it can efficiently transfer heat to food. Moreover, when condensed water adheres to the food surface and salt and oil are dropped together with condensed water, salt and oil in the food can be reduced. Further, the inside of the heating chamber is filled with superheated steam or saturated steam, and becomes anoxic state, thereby enabling cooking while suppressing oxidation of food.

  In addition to the heating cooker, the electrical device shut-off device of the present invention can also be used in, for example, electrical devices such as a copying machine, a toilet seat device, and an electric carpet.

24 Steam Generation Heater 100 Control Device 109 Upper Heater 137 Lower Heater 151 First Thermistor 155 Steam Generation Heater Relay 156 Upper Heater Relay 157 Lower Heater Relay 171 First Thermostat 172 Second Thermostat

Claims (5)

A plurality of switches connected to the plurality of heat sources so as to turn on and off the plurality of heat sources respectively;
A control device for controlling on / off of the plurality of switches;
When the temperature caused by the first heat source that is one of the plurality of heat sources is equal to or higher than the first set temperature, a first energization interruption unit that interrupts energization of all the heat sources;
When the temperature caused by the second heat source that is the other one of the plurality of heat sources is equal to or higher than the second set temperature, a second energization interrupting unit that interrupts energization to all the heat sources;
A temperature sensor for detecting a temperature caused by the first heat source,
When the control device determines that the temperature due to the first heat source detected by the temperature sensor is rising when a signal for turning on the switch of the first heat source is not output. An electrical device shut-off device, wherein the switch of the second heat source is turned on to cause the second energization shut-off section to shut off. In the electrical equipment cutoff device according to claim 1,
The electrical equipment shut-off device, wherein the second preset temperature is lower than the first preset temperature. In the electrical equipment cutoff device according to claim 1 or 2,
When the control device does not output a signal for turning on the switch of the first heat source immediately after the electric device is turned on, the temperature caused by the first heat source detected by the temperature sensor is When it is determined that the electric power has risen, the switch of the second heat source is turned on to cause the second energization cut-off section to perform a cut-off operation. In the interruption | blocking device of the electric equipment as described in any one of Claim 1 to 3,
When the control device determines that the temperature caused by the first heat source detected by the temperature sensor is rising when the signal for turning on the switch of the first heat source is not output, The switch for electrical equipment is characterized in that the switch for all other heat sources is turned on together with the switch for the second heat source to cause the second energization blocker to perform a blocking operation.   A cooking device comprising the electrical device shut-off device according to any one of claims 1 to 4.

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