JPH1130425A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker, permitting the easy switching between a temperature conditioning mode and a normal mode and capable of preventing the failure of cooking due to the mistaken recognition of the modes. SOLUTION: A heating cooker is provided with a heating means H1, a temperature sensor 11, a connecting means 8 for connecting the temperature sensor 11 to a heating cooker main body, a temperature conditioning control means 30, regulating the heating amount of the heating means H1 so that the temperature of foods to be cooked, which is detected by the temperature sensor 11, coincides with a predetermined temperature, and a mode switching means 5, switching a temperature conditioning mode for effecting the control of temperature conditioning into a normal mode, in which the control of temperature conditioning is not effected and the food to be cooked is heated by the heating amount set by a user. In such a heating cooker, a heating stopping means 3, stopping the heating by the heating means H1 when the detecting temperature of the temperature sensor 11 has risen to a value higher than a predetermined temperature or the detecting temperature has risen by a given temperature or more under a condition that the temperature sensor 11 is connected and heating operation is effected under the normal mode, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker having a function of immersing a temperature sensor in a food and controlling a heating amount of the food so that the temperature of the food becomes a predetermined temperature. About.

[0002]

2. Description of the Related Art Conventionally, in addition to a normal mode in which food is heated with a predetermined heating amount, a heating cooking mode having a temperature control mode in which the amount of heating is adjusted so that the temperature of the food is maintained at a predetermined temperature. Vessels are known. This temperature control mode is used when cooking tempura or the like. For example, in the case of an electric stove, when a user sets a target temperature with a temperature switch and turns on a heater switch, the temperature control mode is used. Temperature control is started, so that the target temperature matches the actual temperature of the food detected by the temperature sensor,
The heating amount of the electric heater is adjusted.

[0003] In a glass-top type electric stove, a temperature sensor is immersed in the food to directly detect the temperature of the food in order to accurately detect the temperature of the food. Further, in the heating cooker in which the temperature sensor is immersed in the food as described above, by making the heating cooker main body and the temperature sensor detachable, the temperature sensor can be washed alone, In the normal mode in which the temperature control is not performed, the temperature sensor is detached and stored.

If the temperature sensor is detachable from the heating cooker main body, the temperature sensor may be disconnected during the cooking in the temperature control mode, or the cooking in the temperature control mode may be performed without forgetting the connection of the temperature sensor. Could be done.

Therefore, a connection state detecting means for detecting whether or not the temperature sensor is connected to the heating cooker main body is provided, and when the temperature control mode is set, the temperature sensor is connected to the heating cooker main body. It is known that when it is detected that the heating operation is not performed, the heating operation by the electric heater is prohibited.

On the other hand, for example, when a user attempts to cook tempura in the temperature control mode, a temperature sensor is immersed in oil placed in a cooking container, and heating is started at a high heating amount. If the normal mode is set by mistake, the following inconveniences occur. That is, in the normal mode, since the cooking is heated without performing the temperature control, the temperature of the oil is continuously increased by the heating, and the oil temperature is considered to be controlled to the predetermined temperature. There was a disadvantage that the oil became hot and the tempura cooking failed, contrary to the wishes of the person.

Therefore, in order to solve this inconvenience, when the connection state detecting means detects that the temperature sensor is connected to the heating cooker main body while the normal mode is set, the user is instructed. There has been proposed a device in which the cooking device is erroneously recognized as being set to the temperature control mode, is determined to be using the heating cooker, and is not heated. As a result, cooking failure as described above can be prevented.

However, in this case, when cooking in the normal mode, there is an inconvenience that the temperature sensor must be removed from the heating cooker body. For example,
During cooking in the temperature control mode, the temperature sensor must be removed even when the user wants to suspend the temperature control mode and temporarily switch to the normal mode for cooking. In order to switch to the temperature control mode after the end, the temperature sensor must be connected again, which is inconvenient to use.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned disadvantages, makes it possible to easily switch between the temperature control mode and the normal mode, and to prevent cooking failure due to misrecognition of the mode. It is intended to provide a cooker.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a heating means for heating food, a temperature sensor immersed in the food and used to detect the temperature of the food,
Connecting means for detachably connecting the temperature sensor and the heating cooker main body; and temperature control for adjusting a heating amount of the heating means so that the temperature of the food detected by the temperature sensor coincides with a predetermined temperature. And a temperature control mode for performing temperature control by the temperature control device when the temperature sensor is connected to the heating cooker main body, and the temperature sensor is connected to the heating cooker main body. Irrespective of whether the temperature control is performed or not, the mode control means for switching between a normal mode for heating the food with a heating amount set by the user without performing the temperature adjustment control, In a state where the sensor is connected to the heating cooker main body, when the heating operation in the normal mode is being performed, when the temperature detected by the temperature sensor exceeds a predetermined limit temperature, or has increased by a certain temperature or more. sometimes, Characterized in that a heating stopping means for stopping the heating by the serial heating means.

According to the present invention, when the user actually sets the normal mode, the user mistakenly recognizes that the temperature control mode has been set, and the temperature connected to the heating cooker main body. When the sensor is immersed in the food and heating cooking is started, when the temperature detected by the temperature sensor exceeds the limit temperature during heating cooking, or when the temperature detected by the temperature sensor rises above a certain temperature, The heating operation of the heating means is stopped by the stop control means.

Therefore, even if the user cooks in the wrong setting mode, the cooked food is not overheated, and it is possible to prevent cooking failure such as scorching of the cooked food.

[0013] Further, as long as the temperature detected by the temperature sensor does not exceed the limit temperature, or as long as the temperature detected by the temperature sensor does not rise above the predetermined temperature, cooking in the normal mode can be performed. Therefore, without removing the temperature sensor from the cooking device main body, if the temperature sensor is left in a place away from the cooked food and the heating means, the temperature sensor is connected to the heating cooking device main body and the normal Cooking can be performed in the mode, which is convenient.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external view of a glass-top type electric stove, which is a cooking device of the present embodiment, and FIG.
FIG. 2 is a circuit diagram of the electric stove shown in FIG. 1.

Referring to FIG. 1A, an electric stove body 1 according to the present embodiment includes a right heater H1 and a left heater H2 provided below glass 2 as heating means, and is provided in a grill chamber 3 (not shown). And a grill heater H3. When the user operates the heating amount adjustment knobs 4a, 4b, 4c, the heating operation of the right heater H1, the left heater H2, the grill heater H3 is started and stopped, and the heating amount is adjusted.

The right heater H1 has a temperature control function, and the temperature control target temperature of the user is set by the temperature setting device 5. The temperature setting device 5 sets the temperature adjustment target temperature to 160, as shown in FIG.
A temperature switch 6 for setting the temperature in three stages of ° C, 180 ° C, and 200 ° C, and mode switching means for switching the heating control mode of the right heater H1 between a temperature control mode for performing temperature control and a normal mode for not performing temperature control. A mode changeover switch 7. The right heater H <b> 1 includes two circular electric heaters (not shown) (inside and outside), and the user can switch use / non-use of the outside electric heater by operating the double zone changeover switch 13.

The thermistor 11, which is a temperature sensor, has a jack 8 provided on the electric stove main body 1, a plug 9 inserted and connected to the jack 8, one end connected to the plug 9, and the other end connected to the thermistor 11. Connection cable 1
0 and is connected to the electric stove main body 1 by the connection means 14 constituted by 0. The thermistor 11 is used by being immersed in the food B placed in the cooking container A, and detects the temperature of the food B.

The electronic unit 12 provided in the electric stove main body 1 is configured such that when the mode switch 7 is set to the temperature control mode and the user operates the heating amount adjustment knob from the heating stop position to the heating position, The temperature control of the right heater H1 is started, and the heating amount of the right heater H1 is adjusted so that the target temperature set by the temperature switch 6 and the temperature of the food B detected by the thermistor 11 match.

When the mode switch 7 is set to the normal mode, the temperature control of the right heater H1 is not performed. In this case, the left heater H having no temperature control function
2, the heating is performed with the heating amount set by the heating amount adjustment knob 4a.

Next, the operation of the electric stove body 1 will be described with reference to FIG. FIG. 2 is a circuit diagram of the electric stove main body 1.
2. The grill heater H3 is controlled.

The right heater H1 has circular heating elements 21a and 21b which are arranged inside and outside doubly. The inner heating element 21a generates heat by electric power of 1KW, and the outer heating element 21b generates 1.2KW. Generates heat by electric power. A right heater H1 and a left heater H2 are provided between the heating element 21a and the heating element 21b.
And an operating contact 22 of a relay R4 for turning off (opening) when the total power consumption of the grill heater H3 is equal to or more than a predetermined value to cut off power supply to the outer heating element 21b; Contact 23 for shutting off power supply to the outer heating element 21b in conjunction with the operation of the double zone switch 13
Is provided.

The heating element 2 provided in the left heater H2
1c generates heat by 1.8 KW of electric power, and the heating element 21d provided in the grill heater H3 generates heat by 1.3 KW of electric power.

The heating elements 21a, 21b, 2
An overheat prevention switch 24 is connected to 1c and 21d,
When the heating value of each heating element becomes equal to or more than a predetermined value, the overheat prevention switch 24 connected to each heating element is turned off (open), and the power supply to each heating element is cut off.

Heating amount adjusting switches 25a, 25b, 25
c are heating amount adjusting knobs 4a and 4a shown in FIG.
4b, 4c, the three contacts 26,
27 and 28 and a bimetal heater 29.

When the user sets the heating amount adjustment knob 4a from the heating stop position to the heating position, the contacts 26, 27, and 28 of the heating amount adjustment switch 25a are turned on (closed). When the contacts 27 and 28 are turned on, power is supplied to the heating elements 21a and 21b. When the contacts 26 are turned on, the electronic unit 12 recognizes that the user has operated the heating amount adjustment knob 4a.

The setting of the operation position of the bimetal of the bimetal heater 29 (the position where the contact 28 is turned off due to the deformation of the bimetal) is changed in accordance with the rotation setting position of the heating amount adjusting knob 4a. Since the amount of deformation of the bimetal increases with an increase in the temperature of the bimetal, by changing the operating position of the bimetal of the bimetal heater 29, the energization rate (the energization time per predetermined time) to the heating elements 21a and 21b can be reduced. Can be changed.

The configuration and operation of the heating amount adjusting switches 25b and 25c are the same as those of the heating amount adjusting switches 25a, and the heating amount adjusting switches 25a and 25b are respectively operated according to the operation of the heating amount adjusting knobs 4a and 4b. Operate.

The electronic unit 12 includes a temperature control unit 30.
, Stop control means 31, relays R1 to R4, buzzer 32, and connection state detection means 47. Relay R
1, R2 and R3 are a right heater H1 and a left heater H, respectively.
2. It is for switching ON / OFF of the power supply to the grill heater H3. That is, when the coil of the relay R1 is energized, the operating contact 33 of the relay R1 is turned on.
(Closed), power is supplied to the right heater H1 and the relay R1
When the energization of the coil is cut off, the operating contact 33 of the relay R1 is turned off (open) and the power supply to the right heater H1 is cut off.

Similarly, for the relays R2 and R3, the relays R2 and R3 are switched in accordance with the energization of the coil of the relay R2 and the interruption of energization.
2 and the operating contact 35 of the relay R3 are turned ON / OFF respectively, and the left heater H2 and the grill heater H3 are turned ON / OFF.
Power is supplied / cut off.

The power lamp 36 connected to the electronic unit 12 is turned on when the power switch 22 is in the ON state, and the right heater lamp 37, the left heater lamp 38, and the grill heater lamp 39 are controlled by the heating amount adjustment switch 25a, 25
Lights up when the contacts 26 of b and 25c are ON (closed). The buzzer 32 informs the user of an abnormality by a warning sound.

The temperature control means 30 is for controlling the temperature of the right heater H1. The target temperature set by the user with the temperature switch 6 provided in the temperature setting device 5 and the detection by the thermistor 11 are performed. Power is supplied to and cut off from the heating elements 21a and 21b of the right heater H1 so that the temperatures match. That is, when the temperature detected by the thermistor 11 is equal to or lower than the target temperature, the coil of the relay R1 is energized to turn on (close) the operating contact 33, and the thermistor 11
When the detected temperature exceeds the target temperature, the power supply to the coil of the relay R1 is cut off and the operating contact 33 is turned off.
F (open).

The heating stop means 31 is provided when the detected temperature rise by the thermistor 11 is not detected even after a predetermined time has elapsed after the start of the temperature control of the right heater H1 by the temperature control control means 30. Is determined to be an installation error that is not correctly immersed in the food B, and the relay R
The first operating contact 33 is turned off (opened) and the heating elements 21a, 2
The power supply to 1b is cut off. This prevents the food B from becoming hot.

The connection state detecting means 47 is connected to the thermistor 11
Whether the plug 9 connected to the electric stove body 1 via the connection cable 10 is inserted into the jack 8 provided on the electric stove main body 1 is determined whether or not the plug 9 is provided.
By detecting the open / close state of a jack switch (not shown) that opens / closes in response to non-insertion, it is determined whether or not the thermistor 11 is in a state of being connected to the electric stove body 1.

A high-temperature caution lamp unit 40 is provided in the electric stove main body 1 to alert the user that the glass top 2 is hot due to heat generated by the right heater H1 and the left heater H2. Contact 41 due to heat generated by heater H1
Is turned on, the lamp 42 of the high-temperature caution lamp unit 40 is turned on, the contact 43 is turned on by the heat generated by the left heater H2, and the lamp 44 of the high-temperature caution lamp unit 40 is turned on.

Next, the operation of the heating stop means 31 in accordance with the switching of the heating control mode by the mode switch 7 will be described.

When the heating control mode is set to the temperature control mode by the mode changeover switch 7,
The temperature control control means 30 performs temperature control so that the detected temperature of the food B by the thermistor 11 matches the target temperature by the temperature switch 6, but when the thermistor 11 is not connected to the heating cooker main body, Temperature control cannot be performed.

Therefore, the heating stop means 31 recognizes that the thermistor 11 is not connected by the connection state detecting means 47 when the user operates the heating amount adjusting knob 4a to the heating position in the temperature control mode. Then, the power supply to the coil of the relay R1 is cut off, and the heating by the right heater H1 is stopped. Then, the buzzer 32 notifies the user that the thermistor 11 is not connected (first notification).

On the other hand, when the heating control mode is set to the normal mode, the temperature control is not performed by the temperature control means 30, so that it is not necessary to connect the thermistor 11 to the cooking device body 1. However, when the user interrupts cooking in the temperature control mode and temporarily performs cooking by switching the heating cooking mode to the normal mode, cooking is performed while the thermistor 11 is connected to the heating cooker main body 1. Mode take-off switch 7
Thus, it is more convenient to switch to the normal mode. Therefore, in the present embodiment, it is possible to switch from the temperature control mode to the normal mode regardless of whether the thermistor 11 is connected to the heating cooker main body 1 or not.

When the user erroneously recognizes that the temperature control mode is set when the user is actually set to the normal mode, the thermistor 11 is connected to the heating cooker main body 1, and It is conceivable to operate the heating amount adjusting knob 4a to the heating position.

Therefore, the heating stop means 31 monitors the detected temperature of the food B even in the normal mode, and when the detected temperature exceeds a predetermined limit temperature (for example, 50 ° C.), the relay R1 Then, the power supply to the coil is interrupted, and the heating by the right heater H1 is stopped. In addition, the buzzer 32 notifies the user of the fact that the temperature of the food is high by using a buzzer sound different from the first notification (second notification).

Thus, it is possible to prevent the food B from being heated beyond the high temperature limit temperature, and to distinguish the user from setting the heating control mode incorrectly from the first notification. Can be recognized.

In the present embodiment, the lower limit temperature to be compared with the detected temperature of the thermistor 11 is 50.
° C., when the user mistakenly uses the thermistor 11 to be set to the temperature control mode in spite of the fact that the user is actually set to the normal mode,
Although the example in which the heating of the food B by the right heater H1 is stopped immediately is shown, the limit temperature is set to, for example, 150 ° C.,
The heating of the food B by the right heater H1 may be permitted within a temperature range where cooking does not fail.

Further, in the present embodiment, in the normal mode, when the detected temperature of the thermistor 11 exceeds the limit temperature, the heating stop means 31 stops heating the food B by the right heater H1. After the heating of the food B by the right heater H1 is started, the heating of the food B by the right heater H1 may be stopped when the detected temperature of the thermistor 11 rises by a certain temperature (for example, 10 ° C.) or more.

Further, in this embodiment, a glass-top stove has been described as a heating cooker, but it may be another type of stove or a gas stove.

[Brief description of the drawings]

FIG. 1 is an external view of a glass-top type electric stove, which is a cooking device according to the present invention.

FIG. 2 is a circuit diagram of the electric stove shown in FIG.

[Explanation of symbols]

1. Electric stove, 2. Glass, 3. Grill, 4a, 4
b, 4c: heating amount adjustment knob, 5: temperature setting device, 6: temperature switch, 7: mode changeover switch, 8: jack,
9: plug, 10: connection cable, 11: thermistor,
12 electronic unit, 13 double zone changeover switch, 14 connecting means, H1 right heater, H2 left heater, H3 grill heater, 21a, 21b, 21c, 2
1d: heating element, 25a, 25b, 25c: heating amount adjustment switch, 30: temperature control means, 31: heating stop means, 4
7. Connection state detecting means

Claims (1)

[Claims] A heating means for heating the food; a temperature sensor immersed in the food and used to detect the temperature of the food;
Connecting means for detachably connecting the temperature sensor and the heating cooker main body; and temperature control for adjusting a heating amount of the heating means so that the temperature of the food detected by the temperature sensor coincides with a predetermined temperature. And a temperature control mode for performing temperature control by the temperature control device when the temperature sensor is connected to the heating cooker main body, and the temperature sensor is connected to the heating cooker main body. Irrespective of whether the temperature control is performed or not, without performing the temperature adjustment control, a mode switching means for switching between a normal mode for heating the food with a heating amount set by the user, and a heating cooker comprising: With the sensor connected to the cooking device,
When the heating operation in the normal mode is performed, when the temperature detected by the temperature sensor exceeds a predetermined limit temperature, or when the temperature rises by a certain temperature or more, the heating by the heating unit is stopped. A cooking device characterized by comprising means.