KR100265633B1 - Structure for circulating air of a microwave oven - Google Patents

Abstract

PURPOSE: A structure for circulating air in a microwave oven is provided to prevent discharged air of high temperature from being re-inhaled into the microwave oven to be installed in a sealed space, thereby preventing the decrease of the durability of main parts of the microwave oven. CONSTITUTION: A structure for circulating air in a microwave oven includes a discharge duct(20) detachably mounted on a rear plate(21) to accommodate all discharge holes(14) of the rear plate and having a flow channel for guiding air discharged from the discharge hole to a lower plate, and fixing elements(22) to be secured in elongated holes(20a) formed at both sides of the discharge duct and fixed on the rear plate for applying elastic force, wherein the discharge duct is formed in the shape of "L" for contacting with the rear plate and a bottom plate simultaneously and forming a single opening(20b), the fixing element is formed with protrusions at end parts to be detachably inserted in the elongated holes.

Description

Air circulation structure of microwave oven

The present invention relates to a microwave oven, and more particularly, to an air circulation structure of a microwave oven for preventing durability of main functional parts by preventing re-suction of high-temperature exhaust air in a built-in microwave oven installed in a closed space. will be.

Referring to the perspective view of FIG. 1 showing the configuration of the main part by partially cutting a conventional microwave oven, the inside of the microwave oven main body 10 includes a turntable, a shelf (not shown) for seating food, and forms a cooking chamber. The cabinet 12 is mounted, and main functions such as the magnetron 16 and the high pressure transformer 17 and the blower 15 are installed on the side of the cabinet 12. The magnetron 16, which is a heating source, receives a high voltage from a power supply composed of a high voltage transformer 17, a voltage capacitor, a voltage diode, and the like, generates microwaves, induces vibration of molecules in food, and is heated by frictional heat.

At this time, the blower 15 sucks air into the inlet 13 formed in the back plate 11 to cool the heat generating parts such as the magnetron 16 and the high pressure transformer 17, and then discharges the outlet 14 through the cabinet 12. Cooling and ventilation of the cabinet 12 is also performed while sending air to the.

However, according to the air circulation structure of the conventional microwave oven as described above, when the microwave oven is inserted into the closet, both the air outlet 14 and the air inlet 13 are fixed to the wall surface, so that the air outlet 14 The discharged high heat is sucked back into the suction port 13, and high heat is not easily discharged to the outside, thereby lowering cooling and ventilation functions and causing deterioration of high temperature heating parts such as a heating source part and a power supply part.

Therefore, the technical problem to be achieved by the present invention, that is, the object of the present invention is to solve the above problems of the air circulation structure of the conventional microwave oven, the hot exhaust air is not re-suctioned in the microwave oven is installed in a closed space. It is to provide an air circulation structure of the built-in microwave oven to prevent degradation of durability of the main functional parts.

1 is a perspective view showing the structure of a main part by partially cutting a conventional microwave oven.

Figure 2 is a perspective view showing the main configuration by partially expanding and cutting the back portion of the microwave oven according to the present invention.

3 is a side configuration diagram showing the air circulation of the microwave oven according to the present invention.

* Explanation of symbols for main parts of the drawings

10: body 11, 21: back plate

12 cabinet 13 suction port

14 outlet 15 blower

16: magnetron 17: high pressure transformer

18: cabinet 20: exhaust duct

20a: long hole 20b: opening

22: fixing member

In order to achieve the above object, the present invention provides a microwave oven in which a leg of a predetermined height is fixed to a bottom plate, an inlet for sucking air for cooling and ventilation of the cabinet, and an outlet for discharging air sucked into the cabinet is formed on the back plate. The discharge duct may include: a discharge duct detachably mounted on the rear plate with a flow path for receiving the outlet of the back plate as a whole and guiding air discharged from the outlet to the bottom plate; And it is provided in the air circulation structure of the built-in microwave oven comprising a fixing member which is fixed to the back plate to be seated in the long hole formed on both sides of the discharge duct to act an elastic force.

At this time, the discharge duct is in contact with the back plate and the bottom plate and formed into an “L” shape to form an opening.

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

2 is a perspective view partially enlarged and cut off the rear portion of the microwave oven according to the present invention, and FIG. 3 is a side view illustrating the air circulation of the microwave oven according to the present invention.

As shown, the present invention applies to a microwave oven in which the air intake and exhaust ports for cooling and ventilation are formed in the back plate 21. As described in FIG. 1, the flow of air for cooling and ventilation proceeds to the inlet 13, the blower 15, the high temperature heating unit, the interior of the cabinet 12, and the outlet 14. The configuration is the same as the conventional one, but the external configuration including the back plate 21 is changed and added.

In FIG. 2, according to the present invention, the outlet 14 of the back plate 21 is generally received and the air discharged from the outlet 14 is blocked from the inlet 13 for sucking outside air. A discharge duct 20 having a flow path extending toward the bottom plate side is detachably mounted on the back plate 21. The discharge duct 20 may be formed of sheet metal by sheet metal work, or may be injection molded into heat-resistant plastic.

Since a leg of a predetermined height is fixed to the bottom plate of the microwave oven and has a space portion having a bottom surface and a predetermined height, air discharged from the discharge duct 20 is discharged through the space portion on the bottom plate side.

At this time, the discharge duct 20 is in contact with the back plate 21 and the bottom plate at the same time is formed in the "L" (character) type to form one opening (20b). In addition, it is also possible to interpose the packing in the shape of the letter "L" (shape) so that no gap is formed in the molded part other than the one opening 20b. In addition, the flow path cross-sectional area of the discharge duct 20 is slightly larger than the flow path cross-sectional area of the entire discharge port 14 so that the back pressure due to the air discharge is not greatly increased. If the back pressure is excessively increased, the flow rate decreases, so that proper cooling and ventilation functions are difficult to perform. The opening 20b is preferably disposed away from the inlet 13 to block the inflow of hot air.

In addition, according to the present invention, the fixing member 22 is installed on both sides of the back plate 21 so as to be seated in the long hole 20a formed on both sides of the discharge duct 20 and to act an elastic force. The fixing member 22 is molded using a plastic material having a large elastic force and fixed at the same interval as the width of the discharge duct 20. The length of the long hole 20a of the discharge duct 20 or the length of the fixing member 22 is sufficiently long in order to prevent the discharge duct 20 from being detached by vibration during operation of the microwave oven.

At this time, the fixing member 22 has a projection of a triangular cross-section so that it is easy to attach and detach to the long hole (20a). When the discharge duct 20 is pushed between the fixing members 22, the discharge duct 20 slides a triangular cross section and the fixing member 22 is opened. As the projection of the fixing member 22 is seated in the long hole 20a, the mounting of the discharge duct 20 is completed. However, since the long hole 20a is sealed by the fixing member 22, airtightness is also maintained.

Figure 3 is a side configuration diagram showing the air circulation of the microwave oven according to the present invention will be described a case where the microwave oven is installed in the decorative cabinet 18 is sealed on all sides except the front. When food is put into the cabinet 12 and the microwave oven is operated, air is sucked in the direction of the sign A, flowed into the cabinet 12 through the inlet 13, and the sign B through the opening 20b of the discharge duct 20. The circulation path is separated because it is discharged in the direction of. Air in the direction B is not easily re-intake because of high flow velocity. When the microwave oven is moved to the open position again, the discharge duct 20 may be removed.

At this time, since the microwave resistance in which the exhaust duct 20 of the present invention is installed inevitably increases the pipe resistance, the air volume of the blower 15 required for cooling and ventilation is considered based on the state in which the exhaust duct 20 is mounted.

In addition, in order to prevent the hot exhaust air from being heated inside as it comes into contact with the main body 10, in some cases, reinforce the heat insulating material embedded in the main body 10 or install a separate heat insulating material on the open surface of the discharge duct 20. It is also possible.

The air circulation structure of the built-in microwave oven of the present invention according to the above configuration and action can prevent the re-suction of hot exhaust air into the intake port in the built-in microwave oven installed in a closed space, thereby reducing the durability of the main functional unit It is effective to prevent.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (3)

In a microwave oven, in which a leg of a predetermined height is fixed to a bottom plate, and an inlet for sucking air for cooling and ventilation of the cabinet and an outlet for discharging air sucked into the cabinet are formed in the back plate, the outlet of the back plate is generally A discharge duct detachably mounted on the back plate and having a flow path for guiding air discharged from the discharge port toward the bottom plate side; And a fixing member seated on the long hole formed at both sides of the discharge duct and fixed on the back plate to act on an elastic force. The air circulation structure of a built-in microwave oven according to claim 1, wherein the discharge duct is simultaneously formed in contact with the back plate and the bottom plate and formed into an “L” shape to form an opening. The air circulation structure of a built-in microwave oven according to claim 1, wherein the fixing member has a protrusion at an end thereof so as to be easily attached to and detached from the long hole.

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