KR100420319B1 - Machine Room Cooling Device and Air Flow System in Cavity for Ventillation Hooded Microwave Oven - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven for hood, and more particularly, to a microwave oven electric compartment cooling structure and a cooking chamber airflow structure for cooling an electric compartment heating part using an exhaust motor and forming an airflow in a cooking chamber. will be.

The electric component cooling structure according to the present invention includes an exhaust motor (64) forcibly sucking external air, an electric field chamber (44) serving as a flow path of air sucked from the outside by the exhaust motor (64), and the electric field. The upper and lower portions of the seal 44 include a suction port 60 and a suction unit 70 through which external air is sucked by the suction force of the exhaust motor 64, respectively. In addition, the cooking chamber air flow structure according to the present invention includes a cooking chamber (S) for cooking food, an exhaust motor (64) for sucking and discharging air in the cooking chamber, and air in the cooking chamber (42). It includes a high internal exhaust mechanism (72, 72 ') discharged to the outside, and a high internal suction port 70 for transmitting the outside air to the interior of the cooking chamber. According to the configuration as described above, it is possible to remove the steam by cooling the electric heating room heat generating parts by forming a simple structure without the need for a separate part, by forming an airflow in the furnace.

Description

Machine Room Cooling Device and Air Flow System in Cavity for Ventillation Hooded Microwave Oven}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven for a hood, and more particularly, to an electric appliance for a microwave oven for cooling the electrical parts of a hooded microwave oven by using an exhaust motor and removing steam in the cooking chamber generated during cooking. It relates to a cooling structure and a cooking chamber airflow structure.

In general, the hood-only microwave oven has an exhaust function for exhausting heat and smoke generated in the gas oven range in addition to the cooking function which is a function of the microwave oven.

Hooded microwave ovens tend to be increasingly used due to the efficiency of space utilization of gas ovens and microwave ovens and the comfort of the environment.

Based on the accompanying drawings, FIGS. 1 to 4, a general structure of a hood-use microwave oven (hereinafter, simply referred to as a “microwave oven”) will be described.

As shown in FIG. 1, the microwave oven 1 includes a cavity 2 forming an exterior, a cooking chamber S formed in the cavity 2 to heat and cook food, and It is configured to include a full-length chamber 4 located on the side of the cooking chamber (S).

The electric compartment 4 has built-in parts for supplying microwaves, which are heating sources for heating food. That is, the electric chamber 4 includes a magnetron 22 for oscillating microwaves, and a high voltage transformer 24 for raising the voltage to apply a high voltage to the magnetron 22.

In addition, when the microwave is oscillated and the microwave oven is operated, high temperature heat is generated in the electrical components such as the magnetron 22 and the high voltage transformer 24. As described above, the heat dissipation of the magnetron 22 and the high-voltage transformer 24, etc., adversely affects the reliability of the parts, and thus, it is necessary to cool the electric compartment heating parts in order to prevent them.

Meanwhile, steam is generated as a result of cooking of food in the cooking chamber S. When the water vapor as described above is formed in the microwave oven door (not shown), there is a problem that can not look inside the cooking chamber (S). Therefore, there is a need to remove the steam generated in the cooking chamber (S) as described above, which forms by removing the air flow in the cooking chamber (S).

Next, a description will be given of the related art related to the electric heating element cooling structure and the cooking chamber air flow structure as described above.

First, as shown in FIG. 2, a side wall 2a is formed to partition the cooking chamber S and the electric compartment 4, and a magnetron 22 for oscillating microwaves is installed on the side wall 2a. In the lower portion of the magnetron 22, a bar plate 10 for forming the bottom of the electric compartment 4 is installed on the top of the base plate 12 for forming the bottom of the microwave oven. On the bar plate 10, a high voltage transformer 24 for boosting the voltage applied to the magnetron 22 is installed.

In addition, a cooling fan 20 for forcibly sucking external cold air to cool the magnetron 22 and the high voltage transformer 24 is installed above the magnetron 22. In addition, the cooling fan 20 forcibly blows the sucked air so as to face directly downward from the upper end of the electric chamber (4). In addition, a fan motor 18 for driving the cooling fan 20 is connected to the upper portion of the cooling fan 20.

In addition, the suction port 26, which is an inlet through which the external cold air is sucked into the electrical equipment room by the rotation of the cooling fan 20, is installed at one side of the grill 25 in the upper part of the microwave oven.

On the one side of the electric compartment 4, an exhaust duct 15 serving as a passage of exhaust gas generated in a gas oven range (not shown) under the microwave oven 1 is located. An air guide 16 partitions the exhaust duct 15 and the electrical compartment 4 so that the exhaust gas of the exhaust duct 15 does not flow into the electrical compartment 4. An air duct 17 for guiding the outside air sucked through the suction port 26 to the lower part of the electric compartment 4 is installed above the electric compartment 4.

An exhaust port 28 through which the air sucked by the rotation of the cooling fan 20 is exhausted to the outside is provided in a space formed by the base plate 12, the bar plate 10, and the cooking chamber S.

In addition, a high intake port 30 serving as an inlet for introducing the air sucked by the rotation of the cooling fan 20 into the cooking chamber S is provided near the inlet port 26 on one side of the side wall 2a. In addition, the high exhaust pipe 32, which is an outlet through which the air sucked through the high suction port 30 passes through the cooking chamber S and is discharged to the outside of the cavity 2, has a cavity 2 opposite to the high suction port 30. It is installed on the upper surface of). An exhaust port air duct 34 for discharging the air flow path exiting the cooking chamber S through the high exhaust pipe 32 to the outside of the microwave oven is installed on the upper surface of the cavity 2.

In addition, the arrow shown in FIG. 2 represents an air flow for cooling the electric component 4 of the electrical equipment chamber 4, and the arrow shown in FIG. 3 and FIG. 4 represents an air flow for removing water vapor in the cooking chamber S. It is displaying.

Next, a description will be given of a microwave electronic component cooling process and the operation of the airflow in the refrigerator according to the prior art having the configuration as described above.

The cooling fan 20 is rotated by the driving of the fan motor 18 to radiate heat generated during the operation of the magnetron 22 and the high voltage transformer 24. When the cooling fan 20 rotates, the air outside the microwave oven is sucked into the electric compartment through the suction port 26.

The outside air sucked through the suction port 26 flows to the cooling fan 20 under the guidance of the air duct 17 on the upper part of the electric compartment 4, and is directly downward by the rotation of the cooling fan 20. It is forcibly blown.

The external air forcedly blown to the front of the cooling fan 20 cools the high temperature magnetron 22 positioned below the cooling fan 20. A part of the air flow cooling the magnetron 22 is introduced into the cooking chamber S through the high intake port 30.

And, another part of the airflow is cooled outside the microwave oven through the exhaust port 28 formed by the bottom plate 10, the base plate 12 and the bottom of the cooking chamber (S) after cooling the high-voltage transformer (24). To be discharged.

That is, when the exhaust motor (not shown) is operated, the airflow passing through the exhaust port 28 is exhausted along the space formed by the bar plate 10 and the base plate 12 and the exhaust duct 15. The motor (not shown) is forced out of the microwave oven.

The outside air sucked into the electrical equipment room and forcedly blown to the lower part of the electrical equipment room through the above operation process cools the heating equipment heat generating parts such as the magnetron 22 and the high-pressure transformer 24, and then, through the exhaust port 28. Exhaust to the outside of the microwave oven, the remaining portion is introduced into the cooking chamber (S) through the high intake port (30).

On the other hand, the outside air introduced into the cooking chamber (S) through the high suction port 30 forms an air flow inside the cavity (2). The airflow formed inside the cooking chamber S removes water vapor generated in the refrigerator as described above. In particular, in order to remove water vapor formed in the door (not shown), the high inflow inlet 30 is installed near the door of the side wall 2a of the cooking chamber S.

As described above, the outside air, which flows into the cooking chamber S and forms an airflow, removes water vapor in the refrigerator and exits the cooking chamber S through the high exhaust pipe 32. The outside air exiting the cooking chamber S through the high exhaust port 32 is discharged to the front of the microwave oven through the exhaust air duct 34.

However, the conventional electric compartment cooling structure and the cooking chamber airflow structure acting as the configuration and operation as described above pose the following problems.

The structure of forming the electric compartment 4 cooling structure and the cooking chamber airflow according to the prior art requires a separate fan motor 18 and a cooling fan 20 to forcibly blow external air. Separate air ducts 17 and air guides 16 are required to guide external air to the heat generating parts by forced air blowing.

Therefore, a problem arises that the number of parts increases and the product cost rises.

In addition, since the cooling fan 20 generates a lot of noise as the axial flow fan, as a result of inputting less power in order to reduce noise, the cooling efficiency of the electric compartment 4 decreases, and the flow of the airflow in the air is not smooth. Occurs.

An object of the present invention, by cooling the heating element heating parts using the exhaust motor mounted in the conventional microwave oven for the hood, to cool the heating element heating parts without the need for a separate fan motor, cooling fan and air guide, The present invention provides a hood-use microwave oven that can remove air vapor by forming an airflow.

1 is a perspective view showing the appearance of a hood-use microwave oven.

Fig. 2 is a perspective view showing the electric compartment cooling structure of the hood-use microwave oven according to the prior art.

3 is a front view showing a cooking chamber airflow structure of a hood-use microwave oven according to the prior art;

Fig. 4 is a right side view showing the cooking chamber airflow structure of the hood-use microwave oven according to the prior art.

Fig. 5 is a perspective view showing one embodiment of the hood-use microwave electric compartment cooling structure according to the present invention.

Fig. 6 is a perspective view showing still another embodiment of the magnetron cooling structure of the hood-use microwave oven according to the present invention.

Fig. 7 is a front view showing an embodiment of a cooking chamber airflow structure of the hood-use microwave oven according to the present invention.

Fig. 8 is a right side view showing one embodiment of a cooking chamber airflow structure of the hood-use microwave oven according to the present invention.

* Explanation of symbols for main parts of the drawings

1 ........ Microwave oven with hood 2,42 ....... Cavity

2a, 42a ... side wall 3,43 ....... cavity top

4,44 ..... battlefield 10 ......... bar plate

12,52 .... Base plate 14,54 ... back plate

15 ....... Exhaust duct 16 ......... Air guide

17 ....... Air duct 18 ......... Fan motor

20 ....... Cooling fan 22,56 ...... Magnetron

24,58 .... high voltage transformer 25,61 ...... grill

26,60 .... Intake port 28 ......... Exhaust port

30,70 .... High air intake 32,72,72 ′ .. High air exhaust

34 ....... exhaust air duct 45 .........

55 ....... Front Plate 59 ......... Magnetron Air Duct

62 ....... Suction unit 64 ......... Exhaust motor

The microwave electric component cooling structure according to the present invention comprises a suction drive source which simultaneously performs a hood function and an intake function of external air, and an electric flow path of air sucked from the outside by the suction drive source, and various electric parts are installed. A first suction part for sucking the outside air by the suction force of the suction driving source to the upper portion of the electric chamber, and a second suction part for sucking the outside air by the suction force of the suction driving source to the lower part of the electric battle chamber And a cooling duct for communicating the magnetron among the components installed in the electrical equipment room with the suction driving source so that the outside air sucked by the suction driving source cools the magnetron.

According to the above configuration, it is possible to cool the microwave electric compartment heating element by a simple structure without a separate component, in particular it is possible to more effectively cool the magnetron of the microwave electric compartment parts.

The microwave electric component cooling structure is characterized in that the suction drive source is an exhaust motor performing a hood function.

According to the configuration as described above, since the use of the exhaust motor that is conventionally mounted without using a separate component there is an effect of reducing the number of parts and cost.

The microwave electric component cooling structure is characterized in that the first suction part is formed on one side of the front upper grill of the microwave oven, and the second suction part is formed on the bottom surface of the microwave oven.

According to the configuration as described above, it is easy to suck the outside air can effectively cool the electrical components.

The microwave cooking chamber air flow structure according to the present invention includes a cooking chamber which is formed inside the cavity and proceeds with cooking of the food, and is installed on one side of the cavity to suck and discharge air in the cooking chamber, and the suction driving source. A high internal exhaust port formed at a rear side of the upper surface and a rear side of the right side of the cavity to discharge the air inside the cooking chamber to the outside of the cavity; It is configured to include a high intake port for transmitting the outside air into the interior of the cooking chamber.

According to the configuration as described above, the steam generated in the interior can be removed by a simple configuration, thereby reducing the number of parts and reducing the cost, and since the high exhaust port is located close to the suction driving source, the air flow in the cooking chamber is reduced. There is an advantage that the exhaust is smooth.

The microwave cooking chamber air flow structure is characterized in that the intake driving source is an exhaust motor performing a hood function.

According to the configuration as described above, since there is no need for a separate cooling fan to use the existing exhaust motor there is an effect of reducing the number of parts and cost.

The microwave cooking chamber airflow structure is characterized in that the high intake port is formed at one front end of the cavity so that the cooking chamber and the electrical equipment chamber communicate with each other.

According to the configuration as described above, since the high intake port is located adjacent to the suction unit where the outside air is forcibly sucked, there is an advantage that the outside air can be smoothly sucked into the cooking chamber.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

As shown in FIG. 5, the magnetron 56 is installed on the side wall 42a that divides the cooking chamber S and the electric chamber 44. A base plate 52 is formed to form the bottom of the microwave oven, and the back plate 54 is installed at right angles to the base plate 52 to form the rear surface of the microwave oven at right angles to the base plate 52. And, 55 is a front plate forming the front of the microwave oven.

The front plate 55 is provided with a control unit 45 that forms the front of the electrical equipment room (44). Then, a transformer 58 is installed on the base plate 52.

In addition, an exhaust motor 64 is installed above the microwave cavity 42. The exhaust motor 64 forcibly sucks exhaust gas exhausted from a gas oven range (not shown) located in the lower part of the microwave oven into the microwave oven and exhausts it to the atmosphere, and cool air outside the microwave oven in the electrical equipment room 44. After forced intake into the inside, forced out again to the outside of the microwave oven.

An inlet 60, which serves as an inlet for external air to be forced into the electric compartment 44 by the exhaust motor 64, is provided at one side of the upper grill 61 of the microwave front plate 55. In addition, a space formed by the base plate 52 and the lower surface of the cooking chamber S is provided with another suction part 62 that sucks external air for cooling the heating element 44 of the electrical equipment room 44 together with the suction port 60. To be prepared.

And, according to another embodiment of the present invention as shown in Figure 6, the magnetron air duct 59 is connected to the exhaust motor 64 from the upper portion of the magnetron 56. The magnetron air duct 59 allows the outside air sucked through the suction port 60 and the suction part 62 to be concentrated on the magnetron 56, and then exhausted to the exhaust motor 64.

In addition, another embodiment of the present invention shown in FIG. 6 is the same as the configuration of the embodiment shown in FIG. 5 except that the magnetron air duct 59 is added.

A high intake port 70 is provided at one side near the door (not shown) of the side wall 42a of the cooking chamber S. The high inflow inlet 70 is formed by a plurality of vent holes to communicate the cooking chamber (S) and the electric chamber 44, and the air sucked from the outside is an inlet to be sucked into the cooking chamber (S).

Then, the outside air sucked through the high intake port 70 forms an air flow and flows through the inside of the cooking chamber (S), and the high exhaust pipe (72, 72 ') which is an exit from the cooking chamber is the upper surface of the cavity (43). And one side of each of the side walls 42a.

More preferably, the high exhaust pipes 72 and 72 'are formed on the upper surface 43 and the side wall 42a of the cavity adjacent to the exhaust motor 64 for smooth exhaust. The high exhaust pipes 72 and 72 'are also formed of a plurality of through holes.

The arrows shown in FIGS. 5 and 6 indicate an air flow for cooling the electric components in the electric chamber 44, and the arrows shown in FIGS. 7 and 8 remove the steam inside the cooking chamber S. FIG. Airflow for the same.

Next will be described in detail with respect to the operation of the present invention having the configuration as described above.

First, a description will be given of the electrical component cooling structure of the electrical equipment chamber acting by the above configuration.

When the air in the electric chamber 44 is forced into the exhaust motor 64 by the operation of the exhaust motor 64, the suction port 60 and the suction unit 62 in which the electric chamber 44 is communicated with the outside. External air is forcibly sucked into the electric chamber 44 through the.

The outside air introduced through the suction port 60 and the suction part 62 is guided by the base plate 52, the back plate 54, the side wall 42a of the cooking chamber S, and the control unit 45. The magnetron 56 and the high voltage transformer 58 are cooled.

First, when the magnetron air duct 59 according to one embodiment of the present invention is not installed, the external air forcedly sucked into the electric chamber 44 through the suction port 60 may generate heat generating parts of the control unit 45. After cooling, some are introduced into the interior through the high inflow opening 70, and the rest is sucked into the exhaust motor 64 without being lowered to the lower portion of the electric chamber 44, and discharged to the upper portion of the microwave oven.

In addition, the external air introduced through the suction unit 62 flows to the upper part of the electric chamber 44 to cool the heat generating parts such as the transformer 58 and the magnetron 56. Since the outside air sucked through the suction unit 62 includes exhaust gas exhausted from a gas oven range (not shown) below the microwave oven, the outside air is relatively hotter than the outside air sucked through the suction port 60. However, since the temperature of the heat generating parts such as the magnetron 56 and the transformer 58 is much higher than the air sucked through the suction part 62, the external air sucked through the suction part 62 is the magnetron ( 56 and the heat generating parts such as the transformer 58 can be cooled.

Therefore, when the magnetron air duct 59 is not installed, the cold air sucked through the suction port 60 and the external air sucked through the suction part 62 are mixed with each other, and the heat generating parts of the electric chamber 44 are all. Cool down.

In addition, when the magnetron air duct 60, which is another embodiment of the present invention shown in FIG. 6, is installed between the magnetron 56 and the exhaust motor 64, when the exhaust motor 64 is driven, the exhaust motor ( Most of the air inside the electric chamber 44, which is sucked into 64, is sucked along the magnetron air duct 59. Accordingly, most of the outside air is sucked toward the inlet of the magnetron 56 of the magnetron air duct 59.

Therefore, the magnetron 56 is intensively cooled among the heat generating parts of the electric compartment 44. As shown in FIG. 6, a part of the external air sucked through the suction part 62 passes through a heat generating component such as a transformer 58 without directly passing through the magnetron air duct 59. Is inhaled.

In the present embodiment, the magnetron air duct 59 is bent at a right angle at the corner formed by the cavity upper surface 43 and the side wall 42a. More preferably, the magnetron air duct 59 is formed in the communication structure. With less resistance, the flow to the cooling channel will be smoother.

Therefore, the magnetron air duct 59 is not installed to uniformly cool the entire heating element heating part, and the magnetron air duct is used to intensively cool only the magnetron 56 of the electric compartment. 59 is preferably provided between the magnetron 59 and the exhaust motor 64.

In the heating chamber 44 of the heating component cooling structure according to the present invention, the heating chamber 44 is cooled using only the exhaust motor 64 existing in the gas range for the hood without installing a separate cooling fan. It takes the structure to say.

That is, the exhaust motor 64 is used as a suction driving source for forcibly sucking the external air into the electric compartment 44, and then the external air is sucked into the electric compartment 44, and then the external air sucked into the electric compartment 44 generates heat. The heat generating parts of the electrical chamber 44 are cooled by forming a cooling flow path for cooling the electric chamber.

In addition, the cooling flow path is formed in the electric chamber by the forced suction of the exhaust motor 64, rather than forming the cooling flow path by the forced air blowing of the fan motor, so that the cooling efficiency of the heat generating parts is also excellent.

Because, as described above, the forced air blown by the fan motor has a low cooling efficiency, whereas the exhaust motor 64 forcibly sucking the exhaust gas exhausted from the gas oven range (not shown) in the lower portion of the microwave oven has a high performance. Since it has a fan, its suction power and earth output are excellent. Therefore, the flow of the external air generated inside the electrical equipment room 44 is smoothly formed, thereby increasing the cooling efficiency of the electrical equipment.

In addition, the cooling flow path that the forcibly sucked external air is formed in the electric compartment 44, the base plate 52, the back plate 54, the side wall 42a of the cavity and the control unit 45 without a separate air guide It is formed by to cool the heat generating parts of the electric chamber 44.

Secondly, the airflow structure in the air according to the present invention having the above configuration will be described.

When the exhaust motor 64 is operated, external air is forcedly suctioned through the suction port 60 and the suction part 62. As described above, a part of the external cold air forcedly sucked through the suction port 60 cools the heat generating parts of the electric chamber 44 and the other is sucked into the cooking chamber S through the internal suction port 70.

The outside air sucked into the cooking chamber S through the high suction port 70 flows through the inside of the cooking chamber S via an inner surface of a door (not shown). As described above, while the outside air flows through the cooking chamber S, water vapor present in the cooking chamber S, particularly inside the door (not shown) is removed.

The outside air having an air flow formed inside the cooking chamber S is provided through the high exhaust pipe 72 formed on the upper surface 43 of the cavity 43 and the high exhaust pipe 72 'formed on the other side of the cavity side wall 42a. Exits.

As described above, the outside air that has exited the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the oven is discharged to the outside of the microwave oven.

That is, the two high exhaust pipes 72 and 72 'are lowered in pressure due to forced air suction of the exhaust motor 64, so that the air in the air flows out into the two high exhaust pipes 72 and 72'. Exit, the outside air is forced to be suctioned through the high intake port 70 again to the empty space.

That is, the two high exhaust pipes 72 and 72 'are located at a position relatively closer to the exhaust motor 64 than the high air suction port 70. Therefore, when the exhaust motor 64 operates, air in the vicinity of the two high exhaust pipes 72 and 72 'is forcibly sucked into the exhaust motor 64. As a result, the high exhaust pipes 72 and 72 are internally discharged. The pressure is relatively lower than the suction port 70. Therefore, an air flow is formed in the refrigerator by the pressure difference according to the suction driving of the exhaust motor 64 as described above.

Therefore, when the exhaust motor 64 is driven even without a separate fan motor and air guide, an air flow is formed inside the cooking chamber S to remove water vapor in the refrigerator.

In addition, as described above, since the air flow is formed by the suction drive of the exhaust motor 64, which is superior in suction force and earth output, rather than the formation of air flow due to the blowing of the fan motor, more smooth air flow is formed.

The above embodiments of the present invention are merely one embodiment of the technical idea of the present invention, and of course, other modifications are possible within the technical idea of the present invention.

Effects of the present invention by the configuration and operation as described above are as follows.

By eliminating the conventional cooling fan, cooling motor and air guide, and cooling the heat generating parts in the microwave electric cabinet of the hood by using the exhaust motor that is already installed, cost reduction, assembly efficiency and quality improvement according to the number of parts are reduced. The effect occurs.

In addition, by eliminating the use of a separate cooling fan, cooling motor, air guide, etc., by using the existing exhaust motor, airflow is formed in the air to remove water vapor, thus reducing the cost and assembly performance. And quality improvement effects are expected.

In addition, by using an exhaust motor having excellent suction power and earth output as a suction driving source of external air, the cooling efficiency of electrical components is increased, and the flow of air in the air is more smoothly generated.

In addition, according to the reduction of the number of parts as described above, the product structure is simplified, and the product becomes lighter, so that the installation of the product is also easy.

Claims (8)

A suction drive source which simultaneously performs a hood function and a suction function of external air; An electric equipment chamber which serves as a flow path of air sucked from the outside by the suction driving source and is installed with various electric components; A first suction unit configured to suck external air by the suction force of the suction drive source to an upper portion of the electric compartment; A second suction unit configured to suck external air into the lower portion of the electric compartment by suction force of the suction driving source; And And a cooling duct for communicating the magnetron among the components installed in the electrical equipment room with the suction driving source so that the outside air sucked by the suction driving source cools the magnetron. The microwave electronic component cooling structure of claim 1, wherein the suction driving source is an exhaust motor that performs a hood function. The microwave electronic component cooling structure according to claim 1 or 2, wherein the first suction part is formed at one side of the front upper grill of the microwave oven, and the second suction part is formed at the bottom of the microwave oven. delete A cooking chamber formed in the cavity and configured to cook the food; A suction driving source installed at one outside of the cavity and sucking and discharging air in the cooking chamber; A high internal exhaust vent formed on the rear side of the upper surface and the rear side of the right side of the cavity to discharge the air in the cooking chamber to the outside of the cavity by the suction driving source; Microwave cooking chamber air flow structure comprising a high intake port for transmitting the outside air to the inside of the cooking chamber. The microwave cooking chamber air flow structure according to claim 5, wherein the suction driving source is an exhaust motor performing a hood function. delete The microwave cooking chamber air flow structure of claim 6, wherein the high suction port is formed at one end of the cavity to communicate with the cooking chamber and the electric chamber.