JPH02180216A - Electric cooking apparatus - Google Patents

Abstract

PURPOSE:To enable the quick recovering of an oil temperature to the predetermined level even if the temperature drops due to throwing a material in oil by applying the constitution wherein the surface temperature of a heating container is detected with an infrared thermal sensor. CONSTITUTION:An exothermic body 1 is placed around the bottom edges of a heating container 2 and a thin wall part 3 is formed approximately at the intermediate part of the bottom of the heating container 2. In addition, the bottom of the heating container 2 is covered with a heat insulation plate 4 having a through-hole 5 at a position corresponding to the thin wall part 3 of the exothermic body 1. Then, an infrared thermal sensor 6 is so placed that infrared radiation R from the thin wall part 3 of the heating container 2 is received via the through-hole 5. In addition, the thermal sensor 6 and a control part 8 for controlling power supply to the exothermic body 1 depending upon the output of the sensor 6 are so constituted as to be heat insulated with the aforesaid plate 4. According to the aforesaid construction, as temperature detected with the sensor 6 is almost for heat transmission from oil, it is possible to control power supply to the exothermic body 1 while detecting oil temperature almost faithfully. Also, it is possible to prevent the possible reliability drop of the sensor 6 and the control part 8 due to a temperature rise, with the heat insulation plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric cooking device such as an electric deep fryer.

2. Description of the Related Art A conventional electric cooking device of this type has a structure as shown in FIG. 3, for example. That is, the heat receiving part 10 is provided with the heat receiving part 103 in the heating container 102 equipped with the heating element 1o1.
At the same time, attach the thermostat (thermostat) 104 to handle 1.
The heating container 102 was supported by a body 109 having legs 10 and legs 111.

Problems to be Solved by the Invention In such a conventional configuration, the thermostat 104, which detects the temperature of the oil 108 contained in the heating container 102 and controls the energization to the heating element 101, is connected to a heat receiving part located near the heating element. 103, the thermostat 104 is equipped with oil 1.
08 and the heating element 101, and in particular,
As shown in Fig. 4, when the material is put into the oil 108 (
At point A), the oil temperature drops from the set temperature T2 to T1, so the thermostat 104 turns on and the heating element 101 turns on.
However, since heat transfer from the heating element 101 is acting, the temperature of the thermostat 104 rises and turns off before the oil temperature reaches T2 (point B in FIG. 4). Thereafter, while repeating this ON/OFF operation for a period t of tempura cooking, the oil temperature setting value T2 is reached (the fourth
Figures e, D, and E points).

In this way, it takes a long time for the oil temperature to recover to the set temperature T2 from the time the ingredients are added until the tempura cooking is completed, so the finished tempura may be sticky due to too much oil getting into the ingredients, making it difficult to properly prepare the tempura. It was impossible to cook.

The present invention solves these problems and aims to provide an electric cooker that can quickly recover the oil temperature to the set temperature even if the oil temperature drops due to material input. It is.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a heat shield plate that covers the heat generating part of a heating container equipped with a heat generating element and has a through hole, so that the An infrared temperature sensor that detects infrared rays emitted from the heating container and a control section that controls energization to the heating element are shielded from heat by the heat shield plate.

Effect According to the above configuration, the temperature detected by the infrared temperature sensor is the temperature of the heating container, and the majority of the heat is transferred from the oil, so the temperature detected by the infrared temperature sensor is mostly the heat transferred from the oil to the heating element while accurately detecting the oil temperature. In addition to being able to control the energization of the
By shielding the heat from the heat generating section, it is possible to prevent a decrease in reliability due to a rise in temperature of the infrared temperature sensor and the control section.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIG. 1, reference numeral 2 denotes a heating container, and a heating element 1 is disposed around the bottom of the container.

A thin wall portion 3 is formed at approximately the center of the bottom of the heating container 2, and a lower portion of the heating container 2 is covered by a heat shield plate 4 having through holes 5 at positions corresponding to the thin wall portion of the heating container 2. The infrared temperature sensor 6 is arranged to receive the infrared rays R emitted from the thin wall portion 3 of the heating container 2 through the through hole 5,
This infrared temperature sensor 6 and a control section 8 that controls the energization of the heating element 1 based on the output of the infrared temperature sensor 6 are shielded from heat by the heat shield plate 4. 9 in the diagram
is a body, 10 is a handle, and 11 is a leg.

Note that the thin wall portion 3 is less affected by heat transfer from the heat generating portion 3 and emits infrared rays at a temperature approximately equal to the temperature of the oil 7.

Effects of the Invention As is clear from the configuration of the above embodiment, the present invention has a configuration in which the surface temperature of the heating container is detected by an infrared temperature sensor, so that the heat transferred from the heating element is extremely small and changes in oil temperature can be accurately detected. This will be shown below.

Therefore, as shown in Figure 2, material input (point A)
Even if the oil temperature suddenly drops below the set temperature T2, the control section turns ON based on the output of the infrared temperature sensor, energizing the heating element, and the oil temperature quickly recovers from T1 to T2 (point E), at an appropriate temperature. You can eat tempura at
Proper tempura cooking is possible, and since the heat shield plate blocks the heat from the heating element, the temperature of the infrared temperature sensor and control unit is kept low, preventing functional deterioration due to high temperatures and increasing reliability. It can be secured.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an electric cooker showing an embodiment of the present invention;
FIG. 2 is a diagram showing the temperature characteristics of the electric cooker, FIG. 3 is a sectional view of the conventional electric cooker, and FIG. 4 is a diagram showing the temperature characteristics of the electric cooker. 1... Heating element, 2... Heating container, 4.
...Heat shield plate, 6...Through hole, 6...
...Infrared temperature sensor, 8...Control section. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (2)

[Claims] (1) A heat container equipped with a heating element, a heat shield plate that covers the heat generating part of the heating container, and an infrared temperature sensor that detects infrared rays emitted from the heating container through a through hole provided in the heat shield plate. An electric cooking device comprising: an infrared temperature sensor and a control section for controlling energization of the heating element, which are thermally shielded by the heat shield plate. (2) The heating container has a heating element around the bottom and a thin wall part at the center of the bottom, and an infrared temperature sensor detects the infrared rays emitted from the thin wall through the through hole of the heat shield plate. The electric cooker according to claim 1, wherein the electric cooker is configured as follows.