JPH05228065A - Controller of oven toaster - Google Patents

Abstract

PURPOSE:To prevent food from smoking and catching fire by reducing the power supply to a heater to keep a constant temperature even when cooking time is too long. CONSTITUTION:A controller consists of a motor timer having a contact 3which turns on and off heaters 1 and 2, a temperature controller 6 which is brought in action in response to inputs of a temperature sensor 5, and a relay 7 which is brought in action by outputs of the temperature controller 6. Power supply is reduced by turning on and off the relay 7 when the temperature becomes the set temperature of the temperature controller 6 or higher.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oven / toaster used in general households.

[0002]

2. Description of the Related Art Conventionally, a motor timer and a CR timer have been used as control means for setting the cooking time in an oven or toaster. Then, when the cooking time is short, such as toast, the CR timer is used to set the cooking time, and when the cooking time is relatively long, the motor
I used a timer.

[0003]

In such a conventional oven-toaster configuration, when the time switch is used, if the motor timer is set beyond the time determined by the type of material to be cooked, the material burns. There was a significant smoke emission. In addition, depending on the material, there is a problem that the material is ignited within the settable range of the motor timer.

The present invention solves the above problems, and an object of the present invention is to provide a control device for an oven / toaster that does not ignite or smoke even if the cooking time is set to be longer by mistake. ..

[0005]

In order to achieve the above-mentioned object, a control device for an oven / toaster according to the present invention has a first means, a heater, a timer means having a contact for turning on / off the heater, and a temperature sensor. And a temperature control unit that operates by the input of the temperature sensor, and a relay that operates by the output of the temperature control unit, so that power is reduced by turning on and off the relay above the temperature detected by the temperature control unit. It will be configured.

The second means is a heater, a timer means having a contact for turning on / off the heater, a smoke sensor, an energization control means operated by an input of the smoke sensor, and an output of the energization control means. An operating relay is provided, and the relay is turned off by the output of the smoke sensor to stop energizing the heater.

[0007]

According to the present invention, by the structure of the first means described above, even if the cooking time set by the motor / timer is too long for the material, the temperature sensor detects the temperature in the oven / toaster to detect the temperature control means. When the temperature is higher than or equal to the temperature, the heater is turned on / off to reduce the electric power supplied to the heater, so that the temperature can be prevented from rising too much.

Further, according to the structure of the second means, the smoke sensor provided in the oven / toaster stops the energization when the material emits smoke, so that the material emits smoke.
Ignition can be prevented.

[0009]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

In the figure, 1 and 2 are heaters for heating and 3
Is a contact of a motor timer for turning on / off the heaters 1 and 2, 4 is a motor timer for setting the energization time of the heaters 1 and 2, and 5 is a temperature inside the oven / toaster including a negative characteristic thermistor. Is a temperature sensor for operating the output of the temperature sensor 5, and is a temperature control means for turning off the relay contact 7 at a constant temperature.

Heaters 1 and 2 for heating are provided inside the main body 8 so that the cooking plate 10 can be efficiently heated by the reflection plate 9. A motor / timer 4 is attached to the front surface of the main body 8, and the knob 11
You can set the cooking time by turning.

The temperature sensor 5 is attached to the reflection plate 9 and is connected to the temperature control means 6.

In the above structure, when the cooked food 10 is put in the main body 8 and the cooking time is set by the motor / timer 4 and the heaters 1 and 2 are energized to heat the cooked food 10, the main body 8 is heated.
The temperature inside rises and cooking takes place. At this time, even if the cooking time is mistakenly set to be longer, the temperature inside the main body 8 is detected by the temperature sensor 5, and when the temperature exceeds the set temperature of the temperature control means 6, the relay 7 is turned off and the heaters 1 and 2 are connected.
Energization is stopped. Then, when the temperature drops, the relay 7 is activated to energize the heaters 1 and 2, and the temperature inside the main body 8 is prevented from becoming an abnormal temperature even within the time set by the timer.

As an outline of the operation of the present invention, as shown in the temperature characteristic diagram of FIG. 3, when the temperature reaches θ, the contact 7 of the relay is turned off and the temperature becomes stable at θ. By this operation, even if the cooking time is set to be long, it is possible to prevent smoke or ignition from the material.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, the smoke sensor 12 is provided corresponding to the opening 13 formed in the upper portion of the reflector 9, and the energization control means 14 which operates by the input of the smoke sensor 12,
A relay (not shown) that operates by the output of the energization control means 14 is provided, and the relay is turned off by the output of the smoke sensor 12 to stop the energization of the heaters 1 and 2.

In the above structure, even if the setting of the cooking time is lengthened and the material starts to emit smoke, the smoke sensor 12 detects the smoke and prevents the heaters 1 and 2 from being de-energized and ignited. You will be able to do it.

[0018]

As is apparent from the above embodiments, according to the present invention, the timer means for turning on and off the heater, the control means operated by the input of the temperature sensor or the smoke sensor, and the output of this control means are operated. Equipped with a relay to set the cooking time set by the timer means even if the cooking time exceeds the time specified by the material to be cooked.
Since the temperature and smoke in the toaster are detected to control the energization of the heater, it is possible to provide an oven / toaster that can prevent the cooking material from smoking or igniting.

[Brief description of drawings]

FIG. 1 is a block diagram of a circuit of an oven toaster according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an oven / toaster according to the first embodiment.

FIG. 3 (a) is a temperature characteristic diagram of an oven / toaster according to the same first embodiment; and (b) is a duty ratio characteristic diagram of an oven / toaster according to the first embodiment.

FIG. 4 is a sectional view of an oven toaster according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 2 heaters 3 contacts for motor timer 4 motor timer 5 temperature sensor 6 temperature control means 7 relay contact 12 smoke sensor 14 energization control means

Claims (2)

[Claims] 1. A heater for heating food in a main body of an oven / toaster, a timer means having a contact for turning on / off the heater, a temperature sensor for detecting a temperature in the main body, and an input of the temperature sensor. An operating temperature control means and a relay provided in the electric circuit of the heater that operates by the output of the temperature control means are provided, and the electric power supplied to the heater is turned on and off when the temperature is equal to or higher than the set temperature of the temperature control means. Oven and toaster control device configured to reduce by. 2. A heater for heating food in a main body of an oven / toaster, a timer means having a contact for turning on / off the heater, a smoke sensor for detecting smoke in the main body, and an input of the smoke sensor. A configuration in which an energization control unit that operates and a relay provided in the electric circuit of the heater that operates by the output of the energization control unit are provided, and the relay is turned off when the output of the smoke sensor reaches a predetermined level or more. Control device for oven and toaster.