KR100350418B1 - Microwave oven - Google Patents

Abstract

The present invention has a main body in which a component chamber is formed, a cooling fan casing provided in the component chamber and having at least one discharge port, and a cooling fan installed in the cooling fan casing and blowing to the discharge port through a discharge passage. A microwave oven, comprising: a guide installed in the discharge passage and guiding discharge air; It characterized in that it comprises an angle adjusting means for adjusting the angle of the guide. As a result, a cooling fan casing that can be used in common regardless of the location of the device parts and various types of device models is provided, thereby providing a microwave oven capable of reducing manufacturing cost and improving productivity.

Description

Microwave oven {MICROWAVE OVEN}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, a main body in which a component chamber is formed, a cooling fan casing provided in the component chamber and having at least one discharge port, and a discharge flow path installed in the cooling fan casing. It relates to a microwave oven having a cooling fan blown through the discharge port through.

Figure 6 is an exploded perspective view of a conventional microwave oven, Figure 7 is a side cross-sectional view showing a coupling state of FIG. As shown in these figures, the conventional microwave oven 101 includes a main casing 103 in which a cooking chamber 107 and a component chamber 110 are formed, and an inverted " It has an outer casing 105 having a U ″ shape.

In front of the main body casing 103, a door 109 for rotating and opening the front opening of the cooking chamber 107 and an operation panel 108 for operating the microwave oven 101 are provided, and a rear region of the operation panel 108 is provided. In the main body casing 103 of the component chamber 110 is installed so that a plurality of components for the operation of the microwave oven 101 is formed to be isolated from the cooking chamber 107.

The component chamber 110 is provided with a magnetron 111 for outputting microwaves and supplying them to the cooking chamber 107, a high voltage transformer 113 and a high voltage capacitor 115 for applying a high voltage to the magnetron 111. The cooling fan assembly 120 is configured to suck external air through the air inlet hole 117 formed on the rear wall of the component chamber 110 and blow air toward the interior of the component chamber 110.

The cooling fan assembly 120 is installed in the cooling fan casing 121 mounted on the rear wall surface of the component chamber 110 in which the air inlet hole 117 is formed, and the cooling fan casing 121 is provided in the air inlet hole 117. The cooling fan 123 sucks the outside air and blows the air toward the inside of the component chamber 110.

The cooling fan casing 121 is recessed in a cylindrical shape from the plate portion of the flange portion 131 which contacts the rear wall surface of the component chamber 110 so as to surround the air inlet hole 117 of the component chamber 110. And a fan accommodating part 133 to form a predetermined accommodation space, the inlet 135 communicating with the air inlet hole 117 and the fan accommodating part 133 and from one inner peripheral surface of the fan accommodating part 133. The discharge passage 140 is formed to face a predetermined direction in the component chamber 110.

The inlet 135 is formed as an opening edge of the fan accommodating part 133 so as to surround the air inlet hole 117 of the component chamber 110, and the discharge passage 140 has the highest heat generation among the machine parts. An upper discharge passage 141 and a lower discharge passage 147 are formed in upper and lower regions of the cooling fan casing 121 so as to face the magnetron 111 and the high pressure transformer 113.

The discharge passages 141 and 147 respectively have upper and lower discharge ports 143 and 148 formed on the inner circumferential surface of the fan receiving portion 133 so as to face each other, and upper and lower discharge ports 143 and 148 above and below the cooling fan casing 21. And upper and lower discharge ports 145 and 149 formed to communicate with each other. At this time, the upper and lower discharge ports (145, 149) parallel to the rotation axis of the cross flow fan 125 from the fan receiving portion 133 toward the inside of the component chamber 110 from the blower air discharged radially from the cross flow fan 125, which will be described later. It is opened toward the front of the component chamber 110 so as to discharge it.

In addition, the cooling fan 123 is accommodated in the fan receiving portion 133 of the cooling fan casing 121, and the horizontal flow fan 125 that sucks air in the rotational axis direction and blows radially, and the cooling fan casing 121 It is mounted to the outside has a fan motor 127 for rotating the cross flow fan (125). The cross flow fan 125 is rotated by the rotational force of the fan motor 127, and sucks the outside air through the air inlet hole 117 through the upper and lower discharge passages 141 and 147 formed in the fan casing. (110) The air is blown toward the inside.

By such a configuration, when a predetermined time has elapsed since the operation of the microwave oven 101 is started, and device components such as the magnetron 111 and the high voltage transformer 113 are overheated, a predetermined program input to a microcomputer (not shown) The cooling fan 123 starts to operate. When the operation of the cooling fan 123 starts, the outside air is cooled through the air inlet hole 117 and the suction port 135 by the suction force of the cross flow fan 125 rotated by the fan motor 27 ( After being sucked into the fan accommodating part 133 inside the fan accommodating part 133 and discharged radially from the cross flow fan 125, the air blown radially in the fan accommodating part 133 is upper and lower parts of the fan accommodating part 133. Through the discharge passages 141 and 147, the magnetron 111 and the high pressure transformer 113 are concentrated to be discharged to cool the magnetron 111 and the high pressure transformer 113, respectively.

By the way, in such a conventional microwave oven, since the direction of the discharge flow path formed in the cooling fan casing is directed toward the front of the component chamber, the discharge angle and the discharge direction of the wind discharged to the discharge port are always constant.

Accordingly, when the installation location of the magnetron and the high-voltage transformer is changed, the corresponding cooling fan casing should be manufactured and used, thereby providing a factor of increase in production cost and productivity in terms of mold production and material management. have.

In addition, since different cooling fan casings must be used for different models of various microwave ovens, there is a problem in that parts of the cooling fan casing are not compatible.

Accordingly, an object of the present invention is to provide a microwave oven that can reduce the manufacturing cost and improve productivity by providing a cooling fan casing that can be used in common regardless of the location of the device parts and various types of device models. .

1 is an exploded perspective view of a microwave oven according to the present invention;

Figure 2 is an exploded perspective view of the cooling fan casing of Figure 1,

3 to 5 are side cross-sectional views showing the coupling state of FIG.

6 is an exploded perspective view of a conventional microwave oven,

Figure 7 is a side cross-sectional view showing a coupling state of FIG.

* Explanation of symbols for the main parts of the drawings

3: main body casing 10: parts chamber

11: magnetron 13: high voltage transformer

20: cooling fan assembly 21: cooling fan casing

23: cooling fan 33: fan housing

40: discharge passage 41: upper discharge passage

47: lower discharge passage 50: guide means

51: inclined groove 53: guide plate

The object is, according to the present invention, a main body in which a component chamber is formed, a cooling fan casing installed in the component chamber and having at least one discharge port, and installed in the cooling fan casing and blowing into the discharge port through a discharge passage. A microwave oven having a cooling fan, comprising: a guide installed in the discharge passage to guide discharge air; It is achieved by a microwave oven, characterized in that it comprises an angle adjusting means for adjusting the angle of the guide.

Here, the guide is formed in a plate shape; Preferably, the angle adjusting means is a plurality of pairs of inclined grooves formed to face each other on both inner wall surfaces of the discharge passage so as to have different inclination angles in which both edges of the guide slide.

In addition, the cooling fan is a cross flow fan for blowing in the radial direction, the discharge port is opened in parallel with the axis of rotation of the cross flow fan; The guide is effectively disposed in the bending passage of the discharge passage.

Hereinafter, with reference to the accompanying drawings will be described in detail for the subject innovation.

1 is an exploded perspective view of a microwave oven according to the present invention, FIG. 2 is an exploded perspective view of the cooling fan casing of FIG. 1, and FIG. 3 is a side cross-sectional view showing a coupling state of FIG. As shown in these figures, the microwave oven 1 according to the present invention is arranged to surround the main body casing 3 and the main body casing 3 in which the cooking chamber 7 and the parts chamber 10 are formed. It has an outer casing 5 of inverse "U" shape.

In front of the main body casing 3, a door 9 for rotating and opening the front opening of the cooking chamber 7 and an operation panel 8 for operating the microwave oven 1 are provided, and the rear region of the operation panel 8 is provided. In the main body casing 3 of the component chamber 10 is installed so that a plurality of components for the operation of the microwave oven 1 is isolated from the cooking chamber (7).

The component chamber 10 is provided with a magnetron 11 for outputting microwaves and supplying it to the cooking chamber 7, a high voltage transformer 13 for applying a high voltage to the magnetron 11, a high voltage capacitor 15, and the like. The cooling fan assembly 20 is provided to suck outside air through the air inlet hole 17 formed in the rear wall surface of the component chamber 10 and blow air toward the interior of the component chamber 10.

The cooling fan assembly 20 is installed in the cooling fan casing 21 mounted on the rear wall surface of the component chamber 10 in which the air inlet hole 17 is formed, and installed in the cooling fan casing 21 to provide the air inlet hole 17. It has a cooling fan 23 that sucks outside air and blows it toward the inside of the component chamber 10.

The cooling fan casing 21 is recessed in a cylindrical shape from a flange portion 31 contacting the rear wall surface of the component chamber 10 and the plate surface of the flange portion 31 so as to surround the air inlet hole 17 of the component chamber 10. And a fan accommodating part 33 forming a predetermined accommodating space, the inlet 35 communicating with the air inlet hole 17 and the fan accommodating part 33 and from one inner peripheral surface of the fan accommodating part 33. The discharge passage 40 is formed to face a predetermined direction in the component chamber 10.

The inlet 35 is formed as an opening edge of the fan accommodating portion 33 and is arranged to surround the air inlet hole 17 of the component chamber 10. The discharge passage 40 has the highest heat generation among the machine parts. The upper discharge passage 41 and the lower discharge passage 47 are formed in the upper and lower regions of the cooling fan casing 21 so as to face the magnetron 11 and the high pressure transformer 13.

The discharge passages 41 and 47 respectively have upper and lower discharge ports 43 and 48 formed on the inner circumferential surface of the fan receiving portion 33 so as to face each other, and upper and lower portions on the outer and lower sides of the cooling fan casing 21. The upper and lower discharge ports 45 and 49 are formed to communicate with the lower discharge ports 43 and 48. At this time, the upper and lower discharge ports 45, 49 are the rotary shafts of the cross flow fan 25 from the fan accommodating portion 33 toward the inside of the component chamber 10 by blowing air discharged radially from the cross flow fan 25 to be described later. It is opened toward the front of the component chamber 10 so as to discharge in parallel with the line.

The cooling fan 23 is accommodated in the fan receiving portion 33 of the cooling fan casing 21 and sucks air in the rotational axis direction to blow air in a radial direction, and the cooling fan casing 21 of the cooling fan casing 21. It is mounted on the outside and has a fan motor 27 for rotating the cross flow fan 25. The cross flow fan 25 is rotated by the rotational force of the fan motor 27, and sucks external air through the air inlet hole 17 through upper and lower discharge passages 41 and 47 formed in the fan casing. The air is blown toward the inside of the component chamber 10.

On the other hand, on the upper and lower discharge passages 41 and 47 of the cooling fan casing 21, guide means 50 for adjusting the discharge angle of the blower air blown toward the component parts of the component chamber 10 are provided. Since the guide means 50 is provided with the same configuration in the upper and lower discharge passages 41 and 47, the following description will be given with only the guide means 50 provided in the upper discharge passage 41.

The guide means 50 is selectively coupled to any one of the plurality of pairs of inclined grooves 51 and the plurality of pairs of inclined grooves 51 formed to face each other on the inner wall surfaces of both sides of the discharge port region of the upper discharge passage 41. It consists of a guide plate 53.

The plurality of pair of inclined grooves 51 have different inclination angles, respectively, and the guide plate 53 is engaged with any one of the inclined grooves 51 at both ends thereof. At this time, the guide plate 53 is selective to any one of the inclined grooves 51 so as to form an optimum discharge flow path in consideration of the size of the device component (magnetron 11), the installation position, and the model of the microwave oven 1. Combined with engagement.

For example, when the mounting position of the magnetron 11 installed in the upper region of the component chamber 10 is relatively high as shown in Fig. 3, the guide plate 53 is referred to as "51a" in the inclined groove 51. Engaged in the inclined groove is indicated by the direction of the discharged wind to the magnetron (11). On the other hand, when the position of the magnetron 11 is installed as shown in Figure 4, the guide plate 53 is engaged with the inclined groove indicated by the reference numeral "51b", as shown in FIG. And when the installation position of the magnetron 11 is as shown in Fig. 5, the guide plate 53 is engaged with the inclined groove indicated by the reference numeral "51c", as shown in FIG.

As a result, an optimum discharge flow path is formed in consideration of the size of the device component (magnetron), the installation position, and the model of the microwave oven 1. At this time, the guide means 50 provided in the lower discharge passage 47 also, like the guide means 50 provided in the upper discharge passage 41, according to the size, installation, etc. of the high-pressure transformer inclined groove ( 51 may be selectively combined with any one of them to form an optimum discharge passage.

By such a configuration, when a predetermined time elapses after the operation of the microwave oven 1 starts and the device parts such as the magnetron 11 and the high voltage transformer 13 are overheated, a predetermined program input to a microcomputer (not shown) The cooling fan 23 starts to operate. When the operation of the cooling fan 23 is started, the outside air is cooled through the air inlet hole 17 and the suction port 35 by the suction force of the cross flow fan 25 rotated by the fan motor 27 ( 21, the fan receiving portion 33 is sucked into the inside and discharged radially from the cross flow fan 25, the blowing air blown radially in the fan receiving portion 33, the upper and lower portions of the fan receiving portion 33 The magnetron 11 and the high pressure transformer 13 are concentrated and discharged toward the magnetron 11 and the high pressure transformer 13 through the optimum discharge path formed by the guide means 50 provided in the discharge passages 41 and 47, respectively. To cool.

Thus, by providing a guide means capable of angle conversion on the discharge flow path of the cooling fan casing, a single cooling fan casing is used irrespective of the size of the device parts (magnetron, high voltage transformer, etc.), installation location and microwave oven model. It is possible to form the optimal discharge flow path, and the common cooling fan casing can be made to reduce the manufacturing cost and improve the productivity.

In the foregoing and embodiments, the guide means is constituted by a plurality of pairs of inclined grooves formed at different inclination angles in the discharge port region, and a guide plate selectively engaged with any one of the inclined grooves. A guide plate may be provided in the discharge port area, and the guide means may be formed by various devices and structures for angle conversion of the guide plate.

As described above, according to the present invention, there is provided a cooling fan casing which can be used in common regardless of the position change of the device parts and various kinds of device models, thereby providing a microwave oven which can reduce manufacturing cost and improve productivity. .

Claims (3)

In a microwave oven having a main body in which a component chamber is formed, a cooling fan casing provided in the component chamber and having at least one discharge port, and a cooling fan installed in the cooling fan casing and blowing through the discharge passage to the discharge port. , A guide installed in the discharge passage to guide discharge air; Microwave oven comprising an angle adjusting means for adjusting the angle of the guide. The method of claim 1, The guide is formed in a plate shape; The angle adjusting means is a microwave oven, characterized in that a plurality of pairs of inclined grooves are formed opposite to each other inner wall surface in the discharge flow passage formed of different inclined angles each of which is the sliding edge of the guide. The method of claim 2, The cooling fan is a cross flow fan that blows in a radial direction, and the discharge port is opened in parallel with the rotation axis of the cross flow fan; And the guide is disposed in the bending passage of the discharge passage.