KR20080002111A - Heating wire structure of microwave heater - Google Patents

Abstract

Disclosed is a hot wire structure of a heater for a microwave oven. The disclosed invention is characterized in that it comprises a cooking chamber provided inside the inner case, and a heating wire which is installed on the inner wall of the cooking chamber and directly connected to a plurality of radiators to radiate heat inside the cooking chamber.

According to the present invention, unlike the conventional invention, it is possible to improve the cooking performance by irradiating radiant heat evenly inside the cooking chamber, and to obtain the effect of preventing the recording of the heating wire and the coupling wire of the hot wire and the cutting of the terminal.

Description

Heat wire structure of heater for microwave oven {HEAT RAYS IN MICROWAVE OVEN}

1 is an exploded perspective view showing a microwave oven having a heater according to the prior art.

2 is a cross-sectional view showing a heating wire structure of a heater for a microwave oven according to the prior art.

3 is a cross-sectional view showing a preferred embodiment of the heating wire structure of the heater for a microwave oven according to the present invention.

4 is a plan view of FIG.

Explanation of symbols on the main parts of the drawings

110: outer case 110a: cooking chamber

111: inner case 120: battlefield

150: upper plate 170: heater

180: heating wire (structure) 190: heater protector

The present invention relates to a microwave oven, and more particularly, to a hot wire structure of a heater for a microwave oven.

In general, a microwave oven is a cooking apparatus capable of cooking food using microwaves in a short time, and microwaves generated from a magnetron to which high voltage is applied are irradiated into the food inside the cooking chamber through a waveguide. By vibrating the water molecules contained in the food to generate heat energy, the food is heated and cooked therein.

Such microwave ovens can cook various foods in various ways by appropriately adjusting the microwave output and the time that the microwave is irradiated to the food, and also to heat the already cooked food or to melt the frozen food. Can be used.

In the recently developed microwave oven, the electric heater using the resistance heat of the heating wire is installed inside the cooking chamber, so that the radiant heat is irradiated directly to the surface of the food together with the cooking function by the ultra-high frequency as in a conventional microwave oven. It has a function to enable the cooking of foods requiring proper browning of the surface such as bread or fish.

1 is an exploded perspective view showing a microwave oven having a heater according to the prior art, Figure 2 is a cross-sectional view showing a hot wire structure of a heater for a microwave oven according to the prior art.

1 and 2, a cooking chamber 110a is provided inside the inner case 111 of the microwave oven, and an electrical equipment chamber 120 is provided on one side of the inner case 111. The heater 30 is embedded in the heater cover 31 mounted on the upper plate 150 forming the upper surface of the cooking chamber 110a, and an insulation cover (not shown) is installed on the heater cover 31. The heater cover 31 to which the heater 30 is coupled is coupled to a plurality of screws in a state where the upper surface is in close contact with the inner surface of the heat insulation cover (not shown).

Meanwhile, as shown in FIG. 2, the heater 30 has a heating wire 40 in which heat is generated by the application of power therein, and a heating wire inside the heater 30 is formed at both ends of the heater 30. The contact 35 is provided to electrically connect the 40 with an external power source.

In addition, both ends of the heater 30 form a structure shielded by the insulator 34 made of an insulating material, and the insulators 34 are fitted into fitting holes 36 formed on the sidewalls of the heater cover 31, respectively. Both ends of the heater 30 sandwiched by the fitting holes 36 are fixed by the heater bracket 38.

In the case where food is to be cooked by the heater 30 configured as described above, when power is applied, the radiant heat is generated while the heating wire 40 of the heater is heated, and the radiant heat is directly irradiated onto the cooking object to cook the food.

However, conventionally, when using a single heater in accordance with the heater structure, the food does not evenly cook, there is a problem that intensively cook only a specific part, in the case of connecting two heating wires in series using wires High power is concentrated at the connections, causing the wires to withstand high temperatures, resulting in problems such as terminal breakdown or melted wires.

Therefore, there is a need for improvement.

The present invention has been made by the necessity as described above, an object of the present invention to provide a heating wire structure of a heater that can improve the cooking performance by providing a smooth power supply inside the cooking chamber and a microwave oven having the same.

In addition, an object of the present invention is to provide a heating wire structure of the heater that can prevent the recording of the wire of the coupling portion of the heating wire and the heating wire or the cutting of the terminal.

The heating wire structure of the heater for a microwave oven according to the present invention includes: a cooking chamber provided inside the inner case; It is installed on the inner wall of the cooking chamber is characterized in that it comprises a heating wire for directly irradiating radiant heat to the inside of the plurality of cooking chambers.

In addition, the plurality of hot wires are preferably connected in an elliptical shape.

In addition, the heating wire is preferably formed such that the number of windings is reduced than both ends of the center portion is combined with the other heating wire on the basis of each heating wire before being combined.

The heating wire structure of the microwave heater as described above can be directly connected to a plurality of heating wires inside the cooking chamber, evenly radiate heat evenly inside the cooking chamber to improve the cooking performance, the recording of the connection wires or terminals of the heating wire and the heating wire It is possible to obtain an effect that can prevent cuts.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the heating wire structure of the heater for a microwave oven according to the present invention. For convenience of description, the heating wire structure of the microwave oven heater will be described as an example. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

3 is a cross-sectional view showing a preferred embodiment of the heating wire structure of the heater for a microwave oven according to the present invention, Figure 4 is a plan view of FIG.

1, 3, and 4, the heating wire structure 180 of the heater 170 for a microwave oven according to the present invention includes a cooking chamber 110a and an cooking chamber 110a provided inside the inner case 111. Is installed on the inner wall of the plurality is directly connected to the heating wire 180 for irradiating radiant heat inside the cooking chamber (110a).

The hot wire structure 180 of the microwave heater 170 is preferably installed above the microwave cooking chamber 110a.

In addition, the plurality of heating wires 180 are preferably connected in an oval shape, and thus, the heating wires 180 have a structure in which the heating wires 180 are directly connected, and radiant heat is uniformly radiated to the inside of the cooking chamber 110a so that the food inside the cooking chamber 110a is provided. Allow to cook evenly. As such, by directly connecting the heating wires 180, the high power is concentrated on the wires when the wires are connected, thereby overcoming a problem that may cause frequent failures.

As the number of turns of the heating wire 180 increases, radiant heat increases. Since the food is placed on a tray (not shown) in the center of the cooking chamber 110a and cooked, when the heating wire 180 is installed to have a large number of turns at both ends of the food, the cooking performance is high. Can improve.

Therefore, it is preferable that the heating wire 180 is formed such that the number of windings is reduced than both ends of the center portion coupled with the other heating wire 180 on the basis of each heating wire 180 before the coupling.

In one embodiment of the ratio of the number of turns, it is preferable that the number of turns of both sides is about 1.2 to 1.4 times the number of turns of the center portion.

As a material of the heating wire 180, a quartz tube heater using quartz is preferably used.

The quartz tube heater uses radiant heat, which is faster than other heaters in rapid quenching or quenching time. It is often used with reflectors such as conveyor lines and tunnel lines such as textiles, leather and resins. . It is widely used as a heat source for heating in various industries, has high heat resistance and is excellent in heat resistance. In addition, since the expansion rate is low, there are few accidents due to heat and cooling.

However, the bar 170 may be deteriorated due to other foreign matter, dust, etc. during cooking, and it is preferable to protect the outside of the heater 170 with the heater protector 190 made of glass.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the microwave oven having a heating wire structure 180 of the heater 170 for a microwave oven according to an embodiment of the present invention.

The user may use the heater 170 provided in the upper part of the cooking chamber when cooking the food, or may use a magnetron (not shown) provided in the electric chamber 120, and may use them simultaneously.

The heating wire structure 180 of the heater 170 according to the present invention provided above the cooking chamber 110a has an elliptical structure, and the heating wire 180 is a heating wire having a different central portion based on each heating wire 180 before being combined. It is formed to reduce the number of winding than both ends coupled to 180, it is possible to irradiate radiant heat evenly to the food on the tray (not shown) installed in the center of the lower portion of the cooking chamber (110a).

In addition, since the heating wire 180 uses a quartz tube heater, the heat wire 180 is excellent in heat resistance and heat resistance, and rapid heating and quenching are possible.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

As described above, the heating wire structure of the microwave oven heater according to the present invention can improve the cooking performance by irradiating the radiant heat evenly inside the cooking chamber unlike the conventional invention.

In addition, the present invention can obtain the effect of preventing the recording of the wire of the hot wire and the coupling wire of the hot wire and the cutting of the terminal.

Claims (3)

A cooking chamber provided inside the inner case; And The heating wire structure of the heater for a microwave oven, which is installed on an inner wall of the cooking chamber and includes a plurality of heating wires directly connected to radiate heat into the cooking chamber. The method of claim 1, The heating wire structure of the heater for a microwave oven, characterized in that the plurality of heating wires are connected in an elliptical shape. The method of claim 2, The heating wire is a heating element structure of a heater for a microwave oven, characterized in that the winding number is reduced than both ends of the center portion is coupled to the other heating wire on the basis of each heating wire before being coupled.

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