KR20010057090A - Built-in type microwave oven - Google Patents

Abstract

PURPOSE: A built-in microwave oven is provided to sufficiently cool heating components in a microwave oven and to prevent the overheat of an outer case of the microwave oven. CONSTITUTION: A built-in microwave oven comprises: an air intake grill(10) at the front upper part of a microwave oven; a ventilation grill(20) at the front lower part of the microwave oven; an air flow generating unit flowing the intake air sucked via the air intake grill through a cavity of the microwave oven and discharging the air via the ventilation grill; and a partition(60) for separating the lower portion of the cavity from the lower portion of an electric equipment chamber(40). According to the partition, inflow of heat discharged via the ventilation grill to the electric equipment chamber is prevented. Therefore, heat radiating air flows are formed in the microwave oven.

Description

Built-in type microwave oven {Built-in type microwave oven}

The present invention relates to a microwave oven, and more particularly, to a microwave oven having a passage for efficiently cooling an internal heater in a built-in microwave oven configured to be built-in within a storage space of a furniture in a kitchen. will be.

A microwave oven is a device that generates a microwave by supplying a current, and heats the heating object by irradiating the microwave to the heating object. Such a microwave oven can be roughly divided into a general microwave oven, which is usually placed on a table, and a hood-use microwave oven provided on the upper wall of the gas oven range and having an exhaust function.

In recent years, however, many kitchen products such as gas ovens or kimchi refrigerators are being designed in a built-in type. By being built in the built-in type, kitchen appliances and kitchen furniture is in harmony, as well as there is an advantage that can provide their sense of unity.

In the conventional microwave oven, a heating method by supplying microwaves into a cavity and irradiating a heating object is most basic. In addition, since the microwave heating method has only a single heating characteristic by microwaves, recent microwave ovens include a heater as another heating source therein. That is, recent microwave ovens are designed to utilize the heat of a heater in order to give more various heating methods and heating conditions to the heating method by microwaves.

A typical example of such a heater is a quartz tube heater, and convection heating is performed by convection of heat from the quartz tube heater to the inside of the cavity, which may have characteristics such as heating food at a higher temperature. Will be.

Also, in recent years, halogen lamps and the like may be incorporated to provide higher temperature heat and to impart browning characteristics of food surfaces. Halogen lamps are usually provided on the upper and lower surfaces of the inside of the cavity in which the food is located, and have a characteristic of heating food more quickly by injecting heat energy and light energy generated therein into the cavity. When the halogen lamp is built in this way, since high heat is generated from the halogen lamp, a heat dissipation device capable of sufficiently cooling the halogen lamp and its surroundings must be added.

As a result of the recent built-in trend of kitchen furniture, there is a demand for a built-in type in a microwave oven. Also in this built-in microwave oven, in order to impart more various heating characteristics, it is preferable to incorporate a separate heater such as a halogen lamp as described above.

And when the microwave oven is built-in type, only the front of the microwave oven will actually be installed with the front of the kitchen furniture exposed. Therefore, when a high temperature heater is incorporated, the flow of air entering and exiting through the front of the microwave is bound to be formed.

While the microwave oven is running, it is natural that components such as magnetrons and high-voltage transformers, which are installed in the electrical equipment room of the microwave oven, also generate heat. As described above, when the microwave oven is driven, the heaters must be cooled together as well as the heat generating parts installed in the electrical equipment room.

In order to cool such a heater and a heat generating part, the cooling airflow which enters the inside and the outside of a microwave oven cannot but use the whole surface in a built-in type microwave oven. Actually, the airflow of the microwave oven which passes out only the front of the microwave oven is completely different from the conventional airflow, and thus it is impossible to apply a configuration for forming the conventional airflow.

SUMMARY OF THE INVENTION An object of the present invention is to provide a built-in type microwave oven that can be built in to a kitchen furniture, and a cooling structure that can be sufficiently applied to the heat generating parts thereof.

Another object of the present invention is to provide a microwave oven configured to achieve smooth cooling of the heating heater in a microwave oven incorporating a heater that generates heat at a high temperature, and to prevent the outer case of the microwave from becoming hot.

1 is a top perspective view of a microwave oven according to the present invention;

Figure 2 is a bottom perspective view of the microwave oven according to the present invention.

3 is a sectional view seen from the front of a microwave oven according to the present invention;

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

5 is a plan view of a microwave oven according to the present invention;

Explanation of symbols on the main parts of the drawings

2 ..... Cavity 3 ..... Control panel

6 ..... Cavity inlet 10 ...... Suction grill

12 ..... Supporting surface 12a ..... Supporting side wall

14 ..... Cavity top 18a ..... Upper heater cooling passage

18b ..... Inner side passage 20 ..... Exhaust grill

22 ..... Exhaust motor 22a ..... Outer side passage

24 ..... Upper heater cooling fan 26 ..... Electric room cooling fan

28 ..... Lower Heater Cooling Fan 32a ..... Upper Heater

32b ..... lower heater 40 ..... battlefield

44 ..... Magnetron 46 ...... High voltage transformer

48 ..... Air duct 50 ..... Lower duct plate

Microwave oven according to the present invention for achieving the above object,

Next, the present invention will be described in more detail with reference to the embodiments shown in the drawings.

As shown in Fig. 1, a suction grill 10 and an exhaust grill 20 are provided on the front surface of the built-in microwave oven (hereinafter, simply referred to as a microwave oven) according to the present invention. The suction grill 10 is installed at the upper part of the front part to suck air for cooling the heating element installed inside the microwave oven, and the exhaust grill 20 is installed at the lower part of the front part of the microwave oven. It is a part which exhausts the air after cooling a heat generating component via the process.

The suction grill 10 and the exhaust grill 20 are formed in the upper and lower portions of the door 30 of the microwave oven, so that the air sucked through the suction grill 10 is substantially introduced through the upper portion of the cavity, and exhaust Air exhausted through the grille 20 will exhaust through the bottom of the cavity.

1 to 4, the overall configuration and the flow of air will be described. As shown, a part of the suction force for sucking air through the suction grill 10 is provided by the exhaust motor 22 provided on the support upper surface 12.

The exhaust motor 22 is installed on the right side of the drawing on the upper side of the support upper surface 12, that is, on the opposite side of the electric chamber 40, and sucks air through the suction grill 10 by its driving. Since the exhaust motor 22 has a predetermined distance from the front and rear surfaces of the outer case, the exhaust motor 22 can sufficiently suck air through the suction grill 10.

The air introduced into the exhaust motor 22 moves downward along the side wall outer passage 22a formed inside the side wall 1c of the outer case. Then, the air flow moved downwards to the front of the microwave oven through the exhaust grill 20 shown in FIG. 1 via a passage between the bottom face 2a of the cavity 2 and the bottom face 1d of the outer case. Exhausted.

Next, based on FIG. 3, the structure of the battlefield and the air flow formed in the battlefield will be described. The upper heater 32a is provided in the upper surface 2b of the cavity, and the lower heater 32b is provided in the lower surface 2a of the cavity 2. Each of the heaters 32a and 32b has a function as another heating source for heating food in the cavity 2.

An upper heater cooling fan 24 for cooling the upper heater 32a is provided on the upper side of the electric compartment 40. The airflow generated in the upper heater cooling fan 24 is sucked in the interior of the electric compartment 40 and is provided through the upper heater cooling passage 18a formed between the cavity upper surface 2b and the support upper surface 12. Will flow. The upper heater 32a installed in the upper heater cooling passage 18a will cool the heat generated by being exposed to such airflow.

4 clearly shows the configuration of the periphery of the upper heater 32a. As shown in the drawing, a reflecting plate 31a is provided above the upper heater 32a, and the reflecting plate 31a has a role of reflecting heat generated from the upper heater 32a into the cavity C. . A blocking duct 31b is formed on the reflective plate 31a to form a separate air duct. The blocking duct 31b is provided inside the upper heater cooling passage 18a so that the airflow formed by the upper heater cooling fan 24 can flow inward along the direction in which it is installed. . Therefore, when the upper heater cooling fan 24 is operated, an airflow flowing inside the blocking duct 31b and an upper heater cooling passage at the upper portion of the blocking duct 31b are disposed on the upper heater 32a. 18a) It has a double heat shield structure by airflow flowing inside. Therefore, even when the upper heater 32a generates heat, it is possible to sufficiently prevent such heat from being transferred to the upper surface of the microwave oven, and it is possible to conduct heat to the cabinet portion where the built-in microwave oven of the present invention is installed. It can be prevented enough.

The upper heater cooling passage 18a is substantially provided between the cavity upper surface 2b and the support upper surface 12. The upper heater cooling passage 18a extends to the side surface (left side in the drawing) of the cavity 2 and communicates with the side wall inner passage 18b shown in FIG. 3. That is, since the support side wall 12a which is formed at the left end of the support upper surface 12 at regular intervals from the left surface 2c of the cavity 2 and extends downward along it is integrally molded, Between the support side wall 12a and the cavity side surface 2c, the side wall inner passage 18b is formed.

Therefore, the airflow formed by the upper heater cooling fan 24 is supplied through the upper heater cooling passage 18a to cool the upper heater 32a, and then downwards through the side wall inner passage 18b. Will flow. The side wall inner passage 18b extends to the lower portion of the bottom surface 2a of the cavity 2 so that the air discharged therethrough can be exhausted through the lower grill 20 on the front surface. That is, the airflow which cooled the upper heater 32a flows downward through the side wall inner passage 18b, and flows out along the lower passage 18c formed in a horizontal state. The lower passage 18c is formed by a lower duct plate 50 extending horizontally from the lower end of the support side wall 12, and the sidewall inner passage 18b communicates with the lower passage 18c. Therefore, the air exiting the lower passage 18c is exhausted forward through the exhaust grill 20.

In addition, a lower heater cooling fan 28 for cooling the lower heater 32b is provided below the electric compartment 40. The lower heater cooling fan 28 sucks airflow from the upper electric compartment 40 and cools the lower heater 32b provided on the bottom of the cavity.

The airflow generated in the lower heater cooling fan 28 flows through the lower heater cooling passage 28a provided below the cavity bottom surface 2a. Here, the lower heater 32b is molded in the cavity surface 2a at a position corresponding to the inside of the lower heater cooling passage 28a, and is cooled by an air flow generated in the lower heater cooling fan 28. Will be.

The lower heater cooling passage 28a also communicates with the lower passage 18c as shown in FIG. That is, since the bottom surface of the lower heater cooling passage 28a is connected to the lower duct plate 50, the air cooled by the lower heater cooling passage 28a also substantially exits through the lower passage 18c, and the exhaust grill Will be exhausted through 20.

And according to the present invention, as shown in Figure 2, the separation wall 60 is provided in the portion corresponding to the lower portion of the electric chamber 40. The separation wall 60 includes air exhausted to the exhaust grill 20 through the side wall outer passage 22a and air exhausted to the exhaust grill 20 through the lower passage 18c. It prevents the inflow to the side.

Since the airflow that cools the upper and lower heaters 32a and 32b and the components inside the electric compartment (such as magnetron and high voltage transformer) while circulating substantially inside the microwave oven is a high temperature state, such high-temperature air is supplied to the electric compartment. It is undesirable to enter 40. Therefore, by installing the separation wall 60 at the lower end of the electrical compartment 40, the hot air exhausted to the front through the exhaust grill 20 is prevented from flowing back into the electrical compartment 40 through the lower portion. Done.

Next, another air flow will be described with reference to FIGS. 3 and 4. As shown in the drawing, the magnetron 44 for generating microwaves and the high-voltage transformer 46 for applying high pressure to the magnetron 44 are provided inside the electric chamber 40. When the microwave oven is driven, the magnetron 44 and the high voltage transformer 46 generate heat. An electric chamber cooling fan 26 for cooling the heat generating parts is installed in the electric chamber.

The electric compartment cooling fan 26 is installed in a vertical state to the internal frame 42 of the electric compartment so as to generate a forward air flow in the electric compartment 40 to cool the magnetron 44 and the like. have. Alternatively, the inner frame 42 may be installed to have a predetermined inclination so as to generate an airflow that cools the magnetron 44 and the high pressure transformer 46. In addition, in the illustrated embodiment, the example is provided in the inner frame 42, but is not limited to this configuration is obvious.

The electric room cooling fan 26 according to the present invention is within a range capable of generating an air flow for cooling the heat generating parts such as the magnetron 44 and the high pressure transformer 46 installed inside the electric room chamber 40. Of course, many other variations are possible.

The air flow generated in the electric compartment cooling fan 26 is cooled while passing through the magnetron 44 and then introduced into the cavity 2 through the air duct 48. And the air introduced into the cavity 2 will be exhausted to the outside of the cavity, along the path inside, to be completely exhausted to the outside of the microwave oven. As shown in FIG. 5, the connection passage 12d is formed on the upper portion of the support upper surface 12 as illustrated in FIG. 5. Since the connecting passage 12d is shaped to communicate with the interior of the cavity 2 substantially, air in the cavity 2 will be exhausted to the outside via the above-described sidewall outer passage 22a. . Alternatively, as another embodiment for exhausting the air inside the cavity 2 to the outside, it is also possible to form an exhaust part composed of a plurality of ventilation holes on the upper surface 2b of the cavity 2 as in a conventional microwave oven. In this case, when the exhaust part composed of a plurality of vent holes is formed on the cavity upper surface 2b, the exhaust gas is exhausted through the cavity upper surface 2b and flows along the side wall inner passage 18b, and then, the exhaust grill 20 is used. Will be exhausted to the outside.

As described above, three fans are installed on the battlefield side. That is, the upper heater cooling fan 24 for cooling the upper heater, the electric chamber cooling fan 26 for cooling the magnetron 44, the high-pressure transformer 46, and the lower heater for cooling the lower heater. The cooling fan 28 is provided. The cooling fans, through the suction grill 10, generates a flow of air from the outside to the inside of the electric compartment 40, respectively, inside the cavity, the upper heater cooling passage (18a) and the lower heater cooling passage (28a) To generate a flow of air.

As shown in FIG. 1, a part of the air sucked through the suction grill 10 flows through the side wall outer passage 22a formed at the side surface by the exhaust motor 22, and the other part of the air flows through the electric compartment. It is supplied to the battlefield chamber 40 through the inflow passage (6). As described above, the flow of the air supplied to the electric chamber 40 is formed by the upper heater cooling fan 24, the electric chamber cooling fan 26, and the lower heater cooling fan 28. It is natural.

Next will be described with respect to the operation process and the flow of air flow using a heater in the microwave oven according to the present invention configured as described above.

First, when the microwave oven according to the present invention is operated, microwaves are supplied into the cavity 2 while high pressure is applied to the magnetron 44. In addition, the upper heater 32a and the lower heater 32b are selectively heated to generate heat, and the heat generated in this way will be supplied to the inside of the cavity 2.

In addition, as the microwave oven is driven, the upper and lower heaters 32a and 32b and the magnetron 42 start to generate heat, and an air flow for cooling them should be formed. Accordingly, the exhaust motor 22, the upper and lower cooling fans 24 and 28, and the electric chamber cooling fan 26 operate. When the four fans are operated, the air flow toward the inside of the microwave oven will be formed in the suction grill 10.

In this way, a part of the airflow sucked inwardly through the suction grille 10 is connected to the inside of the electric compartment 40 through the connection passage 6, and the other part of the airflow is sidewalled by the exhaust motor 22. It flows to the outer passage 22a.

First, in the airflow supplied to the electric compartment 40, the airflow formed by the upper heater cooling fan 24 flows along the upper heater cooling passage 18a in the electric compartment 40. And as it flows, it cools it while passing through the upper heater 32a provided in the cavity upper surface 2b. The airflow which cooled the upper heater 32a flows downward through the side wall inner passage 18b shape | molded at the outer side of the cavity side surface 2c. The lower end portion of the sidewall inner passage 18b flows out along the lower passage 18c formed horizontally along the cavity bottom surface 2a. Air from the lower passage 18a which is formed by the lower duct plate 50 only in the left part of the cavity bottom surface 2a is exhausted forward through the exhaust grill 20.

The airflow generated by the electric compartment cooling fan 26 cools the magnetron 44 and the high pressure transformer 46 while flowing inside the electric compartment. This airflow is supplied into the cavity 2 through the air duct 48 (see FIG. 3). The airflow supplied into the cavity 2 is exhausted from the cavity 2, such as water vapor generated by the food being heated.

That is, for example, the upper part of the support upper surface 12 is exhausted to the upper part of the support upper surface 12 through a connection passage 12d connected to the upper part of the support upper surface 12 in the cavity 2. It is sucked to the side of the exhaust motor 22, and then flows downward along the side wall outer passage 22a.

The flow of air flowing downward along the side wall outer passage 22a will reach the cavity bottom surface 2a and then be exhausted through the exhaust grill 20 to the front of the microwave oven.

In addition, the lower heater cooling fan 28 provided on the lower side of the electric compartment 40 also sucks air in the upper electric compartment and forms a flow of air flowing inside the lower heater cooling passage 28a. . The air flowing therein by the lower heater cooling passage 28a cools it while passing through the lower heater 32b.

The lower heater cooling passage 28a is shaped to substantially cool the lower heater 32b. In the embodiment shown in FIG. 2, the lower heater cooling passage 28a is the upper heater 32a. It can be seen that it is molded to merge with the side wall inner passage 18b through which the cooled air flows. That is, the air combined in the lower left of the cavity bottom surface 2a in the drawing will exit the lower passage 18c and then be exhausted through the exhaust grill 20 on the front side.

The combined air exits the lower passage 18c immediately before the turntable motor 8. Therefore, the air exiting the lower passage 18c is exhausted through the exhaust grill 20 while cooling the turntable motor 8.

Herein, the air exhausted through the exhaust grill 20 is never introduced into the lower side of the electric compartment 40 by the partition wall 60 according to the present invention. Therefore, the hot air exhausted through the exhaust grill 20 is exhausted only through the exhaust grill 20 and does not flow into the interior of the electric compartment 40 through the lower side, so that the heat generating parts inside the electrical compartment are heated to a high temperature. You can prevent exposure.

As described above, in the present invention, in the built-in microwave oven as described above, by forming a separating wall at the lower part of the electric compartment, it is basic to configure the hot air exhausted through the exhaust grill to not enter the electric compartment. It can be seen that the technical idea.

Within the scope of the basic technical spirit of the present invention, of course, many other modifications are possible to those skilled in the art. That is, of course, many other modifications are possible within the technical scope of the present invention as follows.

The microwave oven according to the present invention as described above is configured to allow the cooling air to flow in and out substantially through its front surface, thereby to optimize the built-in type microwave oven and the internal heating parts of the microwave oven. It can be seen that airflow can be provided.

When the air sucked through the suction grill 10 radiates upper and lower heaters, magnetrons, and high-pressure transformers that generate heat at a high temperature while circulating the inside of the microwave oven, the air is introduced into the lower part of the electric chamber through the lower side again. This prevents the components from being exposed to the high temperature heat in the interior of the electrical compartment. Therefore, it is possible to expect the advantage that it is possible to sufficiently heat the internal parts of the electrical equipment room.

Claims (1)

A suction grill installed at an upper portion of the front surface of the microwave oven; An exhaust grill installed at a lower portion of the front surface of the microwave oven; Airflow forming means for exhausting the air sucked through the suction grill via the inside of the microwave oven and exhausting the air through the exhaust grill; And The rear side of the exhaust grill, it characterized in that it comprises a partition wall provided to block the lower part of the cavity and the lower part of the electric compartment.