KR20000003792U - Heater Cooling Structure of Microwave Oven - Google Patents

Abstract

The present invention relates to a cooling structure for efficiently cooling a heater in a microwave oven using a high temperature heater.

Cooling structure according to the present invention, the heater 40 for generating a high temperature heat, the reflector 30 is installed to surround the outer surface of the heater to reflect the light from the heater into the cavity, for cooling toward the heater It is configured to include a cooling fan unit for generating an air flow, and a louver ring 32 installed in the reflector to guide the air flow generated from the air flow generating means to the inside of the reflector. The louvering is composed of an intake louver for guiding the air flow inwards and an exhaust louver for guiding the inner air to the outside, and the intake louver and the exhaust louver are provided on both sides of the reflecting plate, respectively.

Description

Heater Cooling Structure of Microwave Oven

The present invention relates to a cooling structure of a heater used in a microwave oven, and more particularly, to a structure of a reflector for cooling the heater that can effectively cool the heater installed on the upper and lower surfaces of the microwave cavity.

Various kinds of apparatuses have been proposed to date as heating apparatuses for heating foods. The most primitive heating mechanism is a container of a predetermined shape in direct contact with a heat source, and the contents to be cooked are placed in such a container, and the desired cooking is performed by applying heat.

In addition, many types of cooking apparatuses have been developed that use electric energy directly or indirectly. As an example, a microwave oven using microwaves as a heating source may be cited. A microwave oven is a cooking apparatus in which microwaves are generated using electricity, and the microwaves penetrate the object to be cooked, causing molecular motion inside the object, and thereby heating. Such microwave ovens are widely used for simple heating, for example, a thawing process for dissolving frozen food or a device for heating food such as milk to a predetermined temperature due to its simple configuration and ease of use. It is used.

However, the microwave oven cannot be said to be suitable for heating various objects due to the disadvantages in use due to the heating method and the limitation of its output. That is, the conventional microwave oven using only microwaves as a heating source is pointed out that there is a problem in that it is not possible to provide fast and high-quality cooking because of the unity of the heating method by the microwave and its output. . For example, when heated by microwave, the object is heated both inside and outside together, but this advantage is a significant disadvantage depending on the cooking object. When cooking pizza as described later, it is judged that heating by microwaves is not suitable due to the properties of the object. In addition, it is also pointed out that in the case of heating by a microwave oven, too much moisture is removed from the object.

For these current microwave ovens, various types of microwave ovens using different heat sources have been developed and commercialized. For example, a microwave oven capable of performing appropriate heating on various cooking objects may be mentioned by attaching a convection heater, which can be said to be another heat source, separately from the microwave. In this way, however, even in a microwave oven in which the heater is built, it is true that such a heater does not have various functions as a whole because it only serves as another heat source.

In conclusion, when heating by the conventional microwave only, the limitation of the heating method of the single method of heating by the microwave, the disadvantages of the output, and various disadvantages due to the evaporation of water have been pointed out. Even in the case of installation, the above-mentioned disadvantages cannot be sufficiently solved.

In order to solve the above-mentioned problems of the conventional microwave oven, a microwave oven using light waves as a heating source has been proposed. That is, by using a lamp having a wavelength of at least 90% of the radiant energy of 1 μm or less as a heating source, by appropriately using the visible light and infrared rays emitted from such a lamp, the characteristics of the surface and the inside of the heating object can be adjusted. It is to be able to perform heating while keeping enough power.

As such a heating source, the heater which generate | occur | produces a high temperature is mentioned, As a specific example, a halogen lamp is mentioned.

For example, the difference between the wavelength of the infrared lamp and the visible light is represented by the difference in the heating method by the different wavelengths applied to the object, and by the difference, the outside and the inside of the object are heated in different forms. Using such a heater, for example, in the case of a pizza, it is possible to obtain a cooking state in which the outside has a crunchy heating degree and the inside is sufficiently heated and softly heated with a predetermined moisture.

1 shows a microwave oven using such a heater as another heating source. As shown, the heater 12 is provided in the upper surface 10 of the cavity 2 of the microwave oven.

The reflection plate 14 is installed above the heater 12 to reflect the light waves generated upward from the heater 12 into the lower cavity 2. A plurality of transmission holes 16 are formed on the upper surface of the cavity 2 in which the halogen lamp 12 is provided. In addition, although both sides of the heater 12 are shown in an open state for convenience of illustration, in reality, the microwave 12 is blocked to prevent leakage of the microwave flowing into the heater 12 through the through hole 16.

Next, the cooling structure of the conventional heater 12 will be described with reference to FIG. 2. Since the heater 12 emits a large amount of light wave energy, it must be sufficiently cooled. In fact, it is known that the sealing part of the heater 12 and the reflecting plate 14 are heated to 1000 ° C or more.

Therefore, as shown in the drawing, the cooling fan unit 20 is installed in an adjacent state in order to cool the portion of the heater 12. The cooling fan unit 20 generates airflow for cooling toward the reflecting plate 14 as shown. In FIG. 2, the heater 12 is shown to be visible from the front of the reflector 14 for convenience of illustration, but when viewed from the cooling fan unit 20 side, the heater 12 is sealed to be invisible. This sealing structure is to prevent leakage of microwaves in the microwave oven.

However, according to the conventional structure as described above, since the air flow generated in the cooling fan unit 20 passes through the reflecting plate 14 for cooling, substantially cooling of the portion inside the reflecting plate 14 is performed efficiently. The shortcomings are pointed out.

That is, the conventional airflow cooling structure cools only the upper portion of the reflecting plate surrounding the heater 12 while passing through it, and thus does not sufficiently cool the inside of the reflecting plate such as the surface of the heater and the sealing part of the heater. This is to be pointed out. This becomes a more serious problem considering that the portion inside the reflector is substantially heated to a higher temperature. Failure to cool the heater sufficiently will substantially shorten the life of the lamp, resulting in lower product reliability.

The present invention is to solve the above problems, by configuring the air flow for cooling to be easily introduced into the inside of the reflecting plate, the cooling device that can more efficiently cool the halogen heater inside the reflecting plate The purpose is to provide.

The object of the present invention is achieved by guiding the airflow for cooling in the cooling fan unit to be introduced into the reflection plate of the heater and configured to exhaust the airflow introduced into the outside. Can be.

1 is a schematic configuration diagram of a microwave oven to which a heater is applied.

2 is an explanatory view showing a cooling structure of a conventional heater.

3 is an exemplary view showing a cooling structure of a heater according to the present invention.

Figure 4 is a plan view showing a cooling structure of the heater according to the present invention.

5 is an exemplary view of louvering of the present invention.

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a cross-sectional view taken along the line B-B in FIG. 4.

Explanation of symbols on the main parts of the drawings

30 ..... Reflectors 30a, 30b ..... Side

32 ..... louvering 32a ..... exhaust louvering

32b ..... intake louver 40 ..... heater

50 ..... Cavity Top

According to a specific embodiment of the present invention, a cooling structure includes a heater for generating high temperature heat; A reflector installed to surround an outer surface of the heater to reflect light from the heater into the cavity; Air flow generating means for generating a cooling air flow directed to the heater; And a louver ring installed at the reflector to guide the airflow generated by the airflow generating means to the inside of the reflector.

According to another embodiment of the present invention, the louver is composed of an intake louver for inducing air flow inwards and an exhaust louver for inducing air from the inside, and the intake louver and exhaust louver are respectively It is provided on both sides of the reflecting plate.

According to the present invention, by the louvering which guides the cooling airflow to the inside of the reflector and exhausts it to the outside, smooth cooling of the heater located in the inside of the reflector will be possible.

Next, the cooling structure according to the present invention will be described in more detail with reference to FIGS. 3 to 5.

First, as shown in FIG. 3, a heater (not shown) is installed inside the reflector 30 according to the present invention. In addition, the arrow A means the cooling airflow generated by the cooling fan unit (not shown).

A plurality of louver rings 32 are formed on the outer surface of the reflecting plate 30. As shown in FIG. 5, the louver ring 32 cuts a part of one side wall 31 of the reflector 30 and has an inlet 32m facing one side, and the inlet 32m is a support wall. It is supported by 32n. The louver ring 32 formed by cutting the side wall 31 of the portion substantially corresponding to the inlet 32m and pressing outward more reliably prevents the airflow flowing in the direction of the arrow D shown. It has a structure that can be introduced. In addition, the airflow in the opposite direction to the arrow D is relatively small.

Referring to FIG. 3 again, a plurality of louver rings 32a and 32b are formed on both side surfaces 30a and 30b of the reflecting plate 30, respectively. The louver rings 32a and 32b respectively guide the airflow B for introducing the cooling airflow A from the cooling fan unit into the reflection plate, and discharge the airflow introduced to the outside. It is configured to form a flow (C).

It will be described in more detail with reference to Fig. 4 and Fig. 6 and Fig. 7 which are cross-sectional views taken along line A-A and line B-B of Fig. 4, respectively. The cooling airflow A generated in the cooling fan unit flows through the upper and both side surfaces 30a and 30b of the reflecting plate 30. At this time, the airflow B flowing through the right surface 30b on the drawing flows into the reflection plate 30 through the louver ring 30b. Therefore, by the louver ring 30b, a cooling airflow flows into the inside of the reflector 30 from the outside of the reflector 30 to cool the heater 40.

In addition, the airflow introduced into the reflection plate 30 is configured to easily escape to the outside through the louver ring 32a formed on the right side surface 30a of the drawing. Therefore, through the louver rings 32a and 32b formed on both side surfaces 30a and 30b, the inside and the outside of the reflecting plate 30 communicate with each other to form a smooth flow of air, thereby sufficiently cooling the heater 40. It will be possible.

That is, it can be seen that the louver ring 30b acts as an intake louver for introducing the cooling airflow and the louver ring 30a acts as an exhaust louver for discharging air inside the reflector 30 to the outside.

As shown in Figs. 6 and 7, the louver rings 32a and 32b of the reflector 30 according to the present invention are provided in opposite directions, respectively, so that one side receives the inflow of the cooling airflow and the other. The side is configured to be more suitable for the discharge of the introduced airflow.

Louver ring 32 according to the present invention is not limited to each formed in the opposite direction. By installing the louver rings 32 on both sides in the same direction, even if the airflow for cooling flows from both sides, the reflective plate 30 and the cavity upper surface 50 (see FIG. 3) on which the reflecting plate is installed are completely sealed. Since it is not, the introduced airflow can be sufficiently exhausted to the outside. In particular, in order to allow the light waves of the heater 40 installed inside the reflector 30 to be incident into the cavity of the microwave oven, in consideration of the fact that a plurality of transmission holes (see FIG. 1) are formed in the corresponding portion, It will be fully understood.

In the illustrated embodiment, however, by providing the louver rings 32 in opposite directions, the circulation of air in the horizontal direction through the louver is more smoothly performed.

In the illustrated embodiment, the louver ring 32 is illustrated and described as being molded on both side surfaces 30a and 30b of the reflecting plate 30, but is not limited thereto. For example, it may be possible to mold on any one of the upper surface 30c (see FIG. 5) and both side surfaces of the reflecting plate 30.

In addition, in the present exemplary embodiment, the reflective plate 30 is exemplarily described through being installed on the cavity upper surface 50, but is not limited thereto. For example, the same may also be applied to the case installed on the bottom or side of the microwave oven.

The present invention described above uses a heater such as a halogen lamp and can be applied to any structure having a reflector that reflects heat from such a heater into the cavity. Naturally, it is also possible to use various heaters other than halogen lamps. It is possible.

As described above, according to the present invention, by forming a louver for guiding the inflow of air to both sides of the reflecting plate surrounding the surface of the heater, it is possible to more efficiently cool the heater to an acceptable temperature range. You can expect

Such efficient cooling of the heater can substantially protect the heater at a high temperature, which results in prolonging its life, and can further enhance the reliability of the product of the microwave oven with the heater. There will be.

Claims (3)

A heater generating a high temperature; A reflector installed to surround an outer surface of the heater to reflect light from the heater into the cavity; Air flow generating means for generating a cooling air flow directed to the heater; And Cooling structure of the heater for a microwave oven provided on the reflecting plate and comprises a louver to guide the air flow generated in the air flow generating means to the inside of the reflecting plate. The cooling structure of a heater for a microwave oven according to claim 1, wherein the louver comprises an intake louver for inducing air flow inward and an exhaust louver for inducing air inside. The cooling structure of a heater for a microwave oven according to claim 2, wherein the intake louver and the exhaust louver are respectively provided on both side surfaces of the reflecting plate.