JPS6325677Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a microwave oven in which a stirrer that stirs microwaves is rotated by the driving force of a blower that cools electrical components.

A conventional microwave oven of this type is as shown in FIGS. 1 and 2, and 1 is a microwave oven main body, 2 is a door, 3 is an operating section, 4 is an exterior plate that covers the top surface and both sides of the main body 1, 5 is the exterior rear panel, 6 is the heating chamber,
Reference numerals 7 and 8 refer to the upper wall and right side wall of the heating chamber, 9 an upper space formed on the upper part of the upper wall of the heating chamber, 10 an electrical equipment room formed on the right side of the heating chamber 6, and 11 an upper end of which is the exterior casing. The upper space 9 and the electrical equipment room 1 are in contact with the plate 4.
This is a partition plate that separates the

In the electrical equipment room 10, 12 is a magnetron that supplies microwaves into the heating chamber 6 from an opening (not shown) formed in the upper wall 7 of the heating chamber through a waveguide 13, and 14 is driven by a motor 15. When the blower is driven, cooling air is drawn into the electrical equipment room 10 from an intake port (not shown) formed in the exterior bottom plate, and this cooling air passes through the blower 14 and cools the magnetron 12. Rear duct 1
6 into the upper space 9 from a ventilation hole (not shown) formed in the partition plate 11.
Thereafter, the cooling air is sent to the exhaust port 17 formed in the exterior rear panel 5 while cooling the heating chamber upper wall 7, and is exhausted to the outside from the exhaust port. Sending the cooling air to the upper space 9 in this way to cool the heating chamber upper wall 7 is as follows.
This is to prevent the upper space 9 from becoming undesirably high in temperature due to the high heat generated from the food during microwave heating (although this does not occur frequently).

Reference numeral 18 denotes a rotating shaft 19 passing through the upper wall 7 of the heating chamber.
A stirrer 20 for stirring microwaves in the heating chamber 6 is connected to the motor 1 through an opening 21 formed in the partition plate 11 to rotate the stirrer.
5 is a transmission means for transmitting the driving force of the motor 15 to the upper end of the rotation shaft 19;
It consists of a blower pulley 22 fixed to the drive shaft of the rotating shaft 19, a stirrer pulley 23 fixed to the upper end of the rotating shaft 19, and a belt 24 stretched between the pulleys 22 and 23.

Here, if the opening 21 is formed in the partition plate 11 as described above, a part of the cooling air sent to the upper space 9 passes through the opening 21 and reaches the blower 14 in the electrical equipment room 10 as indicated by the arrow A. The air is sucked in and circulated between the blower 14 and the upper space 9. Then,
The cooling air sent to the upper space 9 is sent to the magnetron 12
The magnetron 1 is already at a fairly high temperature due to cooling, so if the cooling air circulates like this, the magnetron 1
There is a disadvantage that the magnetron 12, etc. cannot be cooled sufficiently, and the life of the magnetron 12, etc. is shortened.

The present invention has been devised in view of these points, and embodiments of the present invention will be described in detail below with reference to FIGS. 3 and 4. Note that the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals, and the explanation thereof will be omitted.

Reference numeral 25 denotes a surrounding body that surrounds the part of the transmission means 20 on the electrical equipment room 10 side, that is, the part of the belt 24 on the electrical equipment room 10 side and the blower pulley 22 together with the exterior plate 4, and the surrounding space 26 is located in the opening 21. is connected to. Reference numeral 27 denotes a pulley opening formed on the bottom surface 28 of the enclosure 25 through which the blower pulley 22 is inserted, and 29 a pulley opening formed on the bottom surface 28 of the enclosure 25, and 29 a pulley opening formed on the bottom surface 28 of the enclosure 25 to prevent a gap from forming between the exterior plate 4 and the enclosure 25 when the exterior plate 4 is attached. 25 is a foam cushion attached to the upper end.

Therefore, even if the opening 21 is formed in the partition plate 11, the opening 21 is substantially closed by the surrounding body 25, so that the cooling air sent to the upper space 9 is not directed to the blower. 14 is rarely attracted.

Thus, according to the present invention, the cooling air from the blower does not circulate between the upper space outside the heating chamber and the electrical equipment room, and therefore electrical equipment such as the microwave supply means can be efficiently cooled. Shortening of lifespan can be significantly suppressed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional microwave oven, Fig. 2 is an enlarged perspective view of section a in Fig. 1 with the exterior plate removed, and Fig. 3 corresponds to Fig. 2 of the microwave oven according to the present invention. FIG. 4 is a perspective view of the same essential parts. 6... Heating chamber, 9... Upper space, 10... Electrical equipment room, 11... Partition plate, 12... Magnetron, 1
4... Blower, 16... Duct, 18... Stirrer, 19... Rotating shaft, 21... Opening, 20... Transmission means, 25... Surrounding body, 26... Surrounding space.

Claims (1)

[Scope of utility model registration request] a heating chamber, a microwave supply means for supplying microwaves into the heating chamber, a stirrer having a rotating shaft passing through the upper wall of the heating chamber and stirring the microwaves within the heating chamber, and an electrical equipment room on the outside of the heating chamber. a blower disposed in the microwave supply means that generates cooling air for cooling electrical components such as the microwave supply means; a duct that guides the cooling air generated by the blower and after cooling the electrical components to an upper part outside the heating chamber; A partition plate that partitions an upper part outside the heating chamber and an electrical equipment room, an opening formed in the partition plate, a transmission means for transmitting the driving force of the blower to the upper end of the rotating shaft of the stirrer through the opening, and the transmission means. A microwave oven characterized by comprising a surrounding body that surrounds a portion of the microwave oven on the side of the electrical equipment room and communicates the surrounded space with the opening.