JPH0121516Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a wall-mounted microwave oven.

<Prior art> A wall-mounted microwave oven is usually installed above a cooking table with a gas stove inside and a gas stove on top, and is fixed to the wall like an indoor unit such as an air conditioner. In order to make effective use of this space, it is purposely installed above the gas stove where hot air is generated. Therefore, this type of microwave oven often has a built-in exhaust means for efficiently exhausting hot air generated from a gas stove or the like to the outside. Normally, the temperature of hot air from gas stoves, etc. is considerably higher than the temperature generated by electrical components such as the microwave oven's magnetron and high-voltage transformer, and the temperature of the indoor air. It had the disadvantage that it could break down.

Also, containers containing water, etc. are sometimes placed on top of the microwave oven, but if such a container is accidentally knocked over,
There was a drawback that the water and the like flowed into the microwave oven from the intake port and damaged the internal electronic circuit components.

<Purpose> The present invention has been made in view of the above-mentioned points, and aims to prevent the temperature rise of electronic circuit components with a simple structure and provide waterproofing.

<Structure> In order to achieve the above-mentioned purpose, the present invention provides an operating section with a printed circuit board on the back side on the front of the main body, and forms an intake port for cooling air at the top of this operating section. A protective cover is provided to cover the printed circuit board along the flow. The protective cover is characterized in that the top surface is inclined downward from the air intake port, and the bottom surface is open.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

Fig. 1 is a schematic side view showing the installed state of a microwave oven showing an embodiment of the present invention, Fig. 2 is a schematic front view of the microwave oven in Fig. 1, and Fig. 3 a.
4 is a perspective view showing the back side of the operating section of the microwave oven, FIG. 4b is a perspective view of a protective cover showing an embodiment of the present invention, and FIG. FIG.

In the figure, reference numeral 1 designates a wall-mounted microwave oven that is attached to a wall surface 6 at the upper part of a cooking table 5, which has a gas oven 2, etc. installed therein, and a gas stove 3 and a pot 4 arranged on the upper surface. 1 is a tray placed in the heating chamber 8, 9 is a magnetron, 10 is a high-voltage transformer, and 11 is a magnetron 9 or a high-voltage transformer 10.
Although not shown, the cooled air is introduced into the heating chamber 8. 1
2 is the microwave oven 1 from indoors as shown by arrow A.
13 is a magnetron exhaust port for discharging air after cooling the magnetron 9, etc.; 14 is an oven exhaust port for discharging gas components such as smoke and steam generated from the food to be heated in the heating chamber 8; 15 is an exhaust port that cools the hot air generated from the gas stove 3, etc. to a certain extent and then discharges it to the indoor side. Reference numeral 16 denotes the operating section of the microwave oven 1, and on the back side there is a printed circuit board 1 on which electronic circuit components are mounted (not shown).
7 is installed. Reference numeral 18 denotes a cover that covers the printed circuit board 17, and has an approximately rectangular parallelepiped appearance.
), and the top surface 19 is inclined downward from the air intake port 12 . Further, the bottom surface 20 is opened so that air around the printed circuit board 17 does not stagnate inside the protective cover 18.

The slope of the protective cover top surface 19 allows intake air to be sent downward smoothly to effectively cool the protective cover 18, and also to allow water flowing in from the intake port 12 to flow downward without accumulating on the top surface 19. It also plays the role of

In addition, the above-mentioned intake port 12, magnetron exhaust port 1
3. Although not shown, integrally formed louvers are provided on the front surfaces of the oven exhaust port 14 and the exhaust port 15.

By attaching the protective cover 18 to the surface side of the printed circuit board 17 in this manner, the air flowing in from the air intake port 12 smoothly descends along the sloped surface of the protective cover 18, so that the protective cover 18 is Cooled efficiently. Therefore, the temperature rise due to hot air from a gas stove or the like disposed at the lower part of the wall-mounted microwave oven can be alleviated, and heat is not directly transmitted to the electronic circuit components mounted on the printed circuit board 17. Furthermore, even if water or the like flows into the microwave oven from the air intake port 12, the electronic circuit components will not get wet because of the protective cover 18.Furthermore, since the top surface 19 of the cover has a sloped part, the water will not flow into the microwave oven. Water does not accumulate on the top surface 19.

<Effects> As explained above, the present invention provides a protective cover that is attached to the back side of the operating section of the microwave oven and covers the printed circuit board on which electronic circuit components are mounted, along the flow of intake air. First, the protective cover is efficiently cooled by the external air sucked through the intake port. Therefore, it is possible to prevent the electronic circuit components covered by the protective cover from increasing in temperature due to hot air from a gas stove or the like disposed below the microwave oven. In particular, since the top surface of the protective cover is sloped downward from the air inlet, the cooling air descends smoothly along the slope, allowing for more efficient cooling.

In addition, the live parts of the printed circuit board can be protected from water droplets and the like, and water that has flowed in can be prevented from accumulating on the top surface. Furthermore, since the bottom surface of the protective cover is open, an excellent effect can be obtained in that hot air can be prevented from stagnation inside the protective cover.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing the installed state of a microwave oven showing an embodiment of the present invention, Fig. 2 is a schematic view of Fig. 1 seen from the front, and Fig. 3a is an operating section of the microwave oven. Fig. 4b is a perspective view of the protective cover, and Fig. 4 is a perspective view showing the protective cover attached to the back side of the operating section. 1...Wall-mounted microwave oven, 2...Gas oven, 3...Gas stove, 5...Cooking table, 11...
...Fan motor, 12...Intake port, 16...Operation unit, 17...Printed circuit board, 18...Protection cover.

Claims (1)

[Scope of Claim for Utility Model Registration] In a wall-mounted microwave oven that is equipped with a fan for cooling a magnetron, etc. and is installed above a cooking table that has a heat source, an operation part that has a printed circuit board on the back side is A protective cover is provided on the front of the range main body, and a cooling air intake port is formed in the upper part of the operating section, and a protective cover is provided to cover the printed circuit board along the flow of air from the intake port toward the cooling fan. A wall-mounted microwave oven characterized by a protective cover whose top surface slopes downward from the air intake port and whose bottom surface is open.