JPH0359318A - Cooking appliance - Google Patents

Abstract

PURPOSE:To make it possible to reduce an output of a first heater and also to eliminate nonuniformity in heating of a matter to be cooked, by surrounding the upper-side part of the first heater by a heat reflecting plate and by disposing a second heater outside the sphere of heat reflection of the heat reflecting plate. CONSTITUTION:A first heater 6 is a glass tube heater or a ceramic tube heater and it is employed mainly for conducting surface heating by making a radiant heat act on a matter to be cooked and for raising a temperature in a cooking chamber 2. A heat reflecting plate 7 surrounds the upper-side part of the first heater 6. A second heater 8 which is a heater other than the glass tube heater and the ceramic tube heater is employed mainly for whole heating and a control of the temperature in the cooking chamber 2 and it is disposed at a portion outside the sphere of heat reflection of the heat reflecting plate 7. The radiant heat from the heater 6 is directed downward by the heat reflecting plate 7 and thereby an efficiency of heat irradiation to the matter to be cooked is improved. Accordingly, sufficient heating can be attained even with an output of the first heater 6 lowered. The radiant heat of the first heater 6 is not interrupted by the second heater 8 and thus nonuniformity in heating is eliminated.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a first heater consisting of a glass tube heater or a ceramic tube heater, and a heater consisting of a heater other than the glass tube heater or the ceramic tube heater. The present invention relates to a cooking device including a second heater.

(Prior Art) Conventionally, in a cooking device such as an oven range with a toaster function, a first heater consisting of a glass tube heater or a ceramic tube heater is provided in the upper part of the cooking chamber, and a heater other than the glass tube heater or the ceramic tube heater, for example. Some are equipped with a second heater made of a stainless steel pipe heater. In this device, the first heater is mainly used to heat the surface of the food such as bread by applying radiant heat, and the second heater is used mainly to heat the entire cooking chamber and control the temperature. I am using it.

(Problems to be Solved by the Invention) However, this method has a disadvantage in that the heat irradiation efficiency of the first heater to the food to be cooked is poor, and the heater output must be increased.

Furthermore, the radiant heat of the first heater is blocked by the second heater, resulting in uneven heating, resulting in poor surface heating of the food to be cooked.

The present invention has been made in view of the above circumstances, and its purpose is to reduce the output of the first heater in a device equipped with a first heater for surface heating and a second heater for overall heating. In addition, it is an object of the present invention to provide a cooking device that can eliminate uneven heating of objects to be cooked.

[Structure of the Invention] (Means for Solving the Problems) The present invention includes a first heater consisting of a glass tube heater or a ceramic tube heater, and a heater other than the glass tube heater or the ceramic tube heater in the upper part of the heating chamber. A second heater is provided, in which an upper portion of the first heater is surrounded by a heat reflecting plate, and the second heater is disposed at a location outside the heat reflecting range of the heat reflecting plate. It is characterized by its structure.

(Function) Since the upper part of the first heater is surrounded by the heat reflecting plate, the radiant heat from the heater is irradiated downward without being diffused, thereby improving the heat irradiation efficiency to the food to be cooked. Furthermore, since the second heater is located outside the heat reflection range of the reflector, the radiant heat of the first heater is transferred to the second heater.
It is not blocked by the heater, and there is no uneven heating of the food to be cooked.

(Example) Hereinafter, an example in which the present invention is applied to a microwave oven with a toaster function will be described with reference to the drawings.

FIG. 1 shows the main parts of a microwave oven with a toaster function, where 1 is an inner casing that constitutes a heating chamber 2;
Its front opening is opened and closed by a door 3. A turntable motor 4 is provided at the outer bottom of the inner casing 1, and a planar heater 5 is attached thereto.

6 is the first heater, which consists of a glass tube heater with a nichrome wire passed inside a glass tube or a ceramic tube heater with a nichrome wire passed inside a ceramic tube. It is used to apply radiant heat to the food to be cooked, such as bread, to heat its surface and to raise the temperature in the cooking chamber 2. Reference numeral 7 denotes a heat reflecting plate which is relatively long in the left-right direction, has a trapezoidal cross section with an open bottom surface, and is made of a material with a glossy surface and high heat reflectivity. This heat reflecting plate 7 is provided outside the top plate portion 1a of the inner casing 1, and its open portion is located outside the top plate portion 1a of the inner housing 1.
The inside is faced from an opening 1b formed in a. As shown in FIG. 2, the first heater 6 is located within the heat reflecting plate 7 and is supported and fixed thereto.
Thus, the heat reflecting plate 7 surrounds the upper portion of the first heater 6.

In this case, the first heater 6 is located at a position recessed above the cooking chamber 2 because the heat reflecting plate 7 projects further to the outside than the upper surface plate portion 1a of the cooking chamber 2. Reference numeral 8 denotes a second heater other than a glass tube heater or a ceramic tube heater, such as a stainless steel tube heater in which a nichrome wire heater is passed through a stainless steel tube and filled with an insulating material.
This second heater 8 is mainly used for heating the entire interior of the cooking chamber 2 and controlling the temperature. As shown in FIGS. 2 and 3, the second heater 8 is arranged in a frame shape located in the upper part of the cooking chamber 2 and around the outer periphery of the heat reflecting plate 7. Thermal reflection range (dotted chain line A in Figures 1 and 2).

It is arranged so that it is located outside of the inner part of A). In this case, since the second heater 8 is a stainless steel pipe heater, it can be easily bent to obtain a rod-like shape.

In the above configuration, when baking bread, a cooking plate (not shown) is placed on the rotating shaft of the turntable motor 4, the bread is appropriately placed on the cooking plate, and the sheet heater 5. The first heater 6 and the second heater 8 are energized. In this case, since the upper part of the first heater 6 is surrounded by the heat reflecting plate 7, the radiant heat from the heater 6 is irradiated downward without being diffused, thereby increasing the efficiency of heat irradiation to the bread that is the food to be cooked. will improve. Therefore, even if the output of the first heater 6 is lowered, sufficient heating can be performed. Also the second
Since the heater 8 is located outside the heat reflection range of the heat reflection plate 7, the radiant heat of the first heater 6 is not blocked by the second heater 8, and the surface of the bread is exposed to the shadow of the heater 8. There is no remaining part of the bread that is less well-done, which eliminates uneven heating of the bread.

In particular, since the first heater 6 is located in a deep part of the cooking chamber 2, when used as a microwave oven, the microwaves reflected from the surface of the second heater 8 are less likely to irradiate the first heater 6. , the first heater 6 will not reach an abnormally high temperature. As a result, even if the first heater 6 is a glass tube heater, the glass tube will not reach an abnormally high temperature.

[Effects of the Invention] The present invention provides a first heater made of a glass tube heater or a ceramic tube heater, and a second heater made of a heater other than the glass tube heater or the ceramic tube heater, in the upper part of the heating chamber. An upper part of the first heater is surrounded by a heat reflecting plate, and the second heater is arranged outside the heat reflecting range of the heat reflecting plate. With this, it is possible to improve the heat irradiation efficiency of the first heater to the food to be cooked, and the output of the first heater can be reduced, and the radiant heat of the first heater is transferred to the second heater. This has an excellent effect of eliminating uneven heating of the food to be cooked without being interrupted by the other heater.

[Brief explanation of drawings]

FIG. 3 is a plan view seen from the direction of the arrow ■ in FIG. 2. In the figure, 2 is a cooking chamber, 6 is a first heater, 7 is a heat reflecting plate,
8 is a second heater.

Claims (1)

[Claims] 1. A first heater consisting of a glass tube heater or a ceramic tube heater and a second heater consisting of a heater other than the glass tube heater or the ceramic tube heater are provided in the upper part of the heating chamber, in which the first heater A cooking appliance characterized in that an upper portion of the heater is surrounded by a heat reflecting plate, and a second heater is disposed outside the heat reflecting range of the heat reflecting plate.