JPH057753Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields The present invention relates to a microwave oven.

(b) Prior Art As shown in FIGS. 5 and 6, a typical microwave oven has a heating chamber 23 formed inside the main body and into which high frequency waves generated by a magnetron 22 are introduced via a waveguide 21. It is divided into an upper stirrer chamber 25 and a lower food chamber 26 by a dielectric cover 24,
A metal stirrer 27 is rotatably provided in the stirrer chamber 25. Further, the magnetron 22 is cooled by the cooling air A generated by the blower 28, and the cooling air after cooling the magnetron 22 is passed through the air guide 29 to the stirrer chamber 25 and the food compartment 26.
will be introduced to The cooling air B introduced into the stirrer chamber 25 is blown onto the stirrer 27 to rotate the stirrer, and the cooling air C introduced into the food compartment 26 is used for ventilation within the food compartment 26. 25a and 26a are a stirrer room intake hole and a food room intake hole provided on the sides of the stirrer room 25 and the food room 26, respectively.

The cover 24 is placed as high as possible in order to increase the volume of the food compartment 26, and the stirrer compartment 25 is made to have the minimum necessary size, so the stirrer compartment 25 is much narrower than the food compartment 26. Therefore,
Even if as many stirrer chamber intake holes 25a are formed in the stirrer chamber 25 as possible, the number is limited, so the amount of cooling air C guided to the food compartment 26 increases, and the amount of cooling air B guided to the stirrer chamber 25 decreases. is no longer sufficient. At this time Stara 27
becomes difficult to rotate, making it impossible to prevent uneven heating.

(c) Problems that the invention aims to solve This invention was created in view of the above-mentioned circumstances.
The purpose is to adjust the amount of air introduced into the heating chamber and the amount of air introduced into the stirrer chamber to a suitable state.

(d) Means for solving the problem The microwave oven of the present invention includes a heating chamber for storing food, a high-frequency supply means for supplying high-frequency waves to the heating chamber, and a cooling air for cooling the high-frequency supply means. an air blower, an integrated cover that divides the heating chamber into a stirrer room and a food compartment, an air guide that guides the cooling air after cooling the high-frequency supply means to the stirrer room and the food compartment, and an air guide provided in the air guide that includes a stirrer. It is characterized by having an air volume adjusting means for adjusting the air volume introduced into the food compartment and the air volume introduced into the food compartment, and a high-frequency stirring stirrer provided in the stirrer room and rotated by the cooling air guided to the stirrer room. do.

(e) Effect By configuring the microwave oven as described above, the cooling air introduced into the heating chamber and the stirrer chamber can be adjusted to a suitable air volume.

(F) Embodiments The embodiments of the microwave oven of the present invention shown in FIGS. 1 to 4 will be described below. 1 is a main body of the microwave oven, 2 is a heating chamber formed within the main body, 3 is a door for opening and closing the front opening of the heating chamber, and 4 is an operation panel provided on the front surface of the main body 1. Reference numeral 5 denotes an electrical equipment room located adjacent to the heating chamber 2 in the main body 1, and the electrical equipment room includes a magnetron 7 that supplies high frequency waves to the heating chamber 2 via a waveguide 6, and a high voltage that is supplied to the magnetron. The high-voltage transformer 8 and a blowing means 9 for generating cooling air for cooling the magnetron 7 and the high-voltage transformer 8 are built in. The blowing means 9 includes a propeller fan 10 and a drive motor 11, and is connected to the cooling air inlet 7 of the heat dissipating section 7a of the magnetron 7.
It is installed on the rear wall 1a of the main body 1 opposite to the rear wall 1a of the main body 1. 16 is a dielectric cover that divides the heating chamber 2 into the food compartment 2a and the stirrer chamber 15; 17 is a stirrer provided in the stirrer chamber 15; and 14 is an air guide attached to the cooling air outlet 7c side of the magnetron 7. The food compartment intake hole 2a formed on the side of the food compartment 2c
and the stirrer chamber intake hole 1 formed on the side of the stirrer chamber 15.
It is provided so as to cover 5a. Furthermore, a wind direction plate 18 is provided at the lower side of the intake side opening 14a of the air guide 14, and the lower side extends inward of the air guide 14 and is bent upward to function as an air volume adjusting means.

While the microwave oven is in use, the magnetron 7 is activated to supply high frequency waves to the heating chamber 2 to perform cooking. At the same time, the blowing means 9 is driven to suck in outside air through the air intake holes 12 formed in the rear wall 1a of the main body 1 to generate cooling air. A part of the generated cooling air is exhausted through the exhaust hole 13 formed in the bottom wall 1b of the main body 1 after cooling the high voltage transformer 8, and the other part is exhausted through the cooling air inlet 7b of the magnetron 7.
The magnetron 7 enters and passes through the heat dissipation section 7a
cooling. The cooling air after cooling the magnetron 7 enters the air guide 14 from the cooling air outlet 7c of the magnetron 7, and is guided by the air guide to the food compartment 2.
c and is introduced into the Stara chamber 2.

In the air guide 14, the cooling air flowing near the air guide plate 18 is directed by the air guide 14.
It easily flows to the upper part of the air guide 14, that is, to the stirrer chamber intake hole 15a side, and to the lower part of the air guide 14, that is, to the heating chamber intake hole 2.
It is difficult for the air to flow to the a side, so the pressure inside the air guide 14 is high at the top and low at the bottom. Therefore, the amount of cooling air B guided to the stirrer chamber 15 is increased compared to the conventional example shown in FIG. 5, and it is possible to prevent the stirrer 17 from becoming difficult to rotate due to an insufficient amount of cooling air B. In addition, the air that cannot enter the stirrer chamber 15 and accumulates at high pressure in the upper part of the air guide 14 and overflows flows through the lower pressure lower part to the food compartment 2c, so that the heating chamber 2 can be sufficiently ventilated. . The shape and dimensions of this wind direction plate may be appropriately designed depending on the air volume required by the stirrer room 15 and the food compartment 2c.

Cooling air B with rotating starrer 17 and food compartment 2
The cooling air c that has been ventilated is exhausted to the exhaust passage 19 in the main body 1 from the stirrer room exhaust hole 15b formed on the side of the stirrer chamber 15 and the heating chamber exhaust hole 2b formed on the side of the food compartment 2, respectively, and then The air is exhausted to the outside of the main body 1 through an exhaust hole 20 formed in 1b.

(g) Effects of the invention According to the microwave oven of the invention, since the air guide that guides the cooling air to the heating chamber and the stirrer chamber is provided with an air volume adjustment means, the air volume guided to each chamber can be adjusted to a suitable state. , the star in the star chamber does not become difficult to rotate.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an embodiment of the microwave oven of the present invention, Fig. 2 is a sectional view of the same, Fig. 3 is a side sectional view of the same, Fig. 4 is a partially cutaway side view of the same main part, and Fig. 4 is a partially cutaway side view of the same. 5
The figure is a sectional view showing a conventional example, and FIG. 6 is a partially cutaway side view of the same essential part. 1...Main body, 2...Heating chamber, 2c...Food chamber,
7... Magnetron, 9... Air blowing means, 10...
Propeller fan, 11... Drive motor, 14...
Air guide, 15... star chamber, 16... cover, 17... starer, 18... wind direction board.

Claims (1)

[Scope of utility model registration request] A heating chamber for storing food, a high-frequency supply means for supplying high-frequency waves to the heating chamber, a blower means for generating cooling air for cooling the high-frequency supply means, and a cover that divides the heating chamber into a stirrer chamber and a food chamber. an air guide that guides the cooling air after cooling the high-frequency supply means to the stirrer room and the food compartment; and an air volume adjustment provided on the air guide to adjust the air volume that is guided to the stirrer room and the air volume that is guided to the food compartment. and a high-frequency stirring stirrer provided in the stirrer chamber and rotated by cooling air guided to the stirrer chamber.