KR20020001241A - Microwave oven with improved cooling function - Google Patents

Abstract

PURPOSE: A microwave oven with improved cooling efficiency is provided to prevent a rise in temperature of heating products such as a magnetron or a high-pressure trans by inhaling air efficiently by a ventilator and to reduce intake noises caused by intake resistance by inhaling air smoothly. CONSTITUTION: A microwave oven with improved cooling efficiency comprises an oscillator generating microwave, an electric supply unit for supplying high-pressure power to the oscillator, a cooling device composed of a ventilator(40) for cooling heat generated from the oscillator and the electric supply unit and a driving motor(42) for driving the ventilator(40), and an outer case(10) provided with an intake port for the aspiration by the ventilator(40), wherein the intake port is composed of many vent holes(10b) distributed circularly in width exceeding the turning radius of the ventilator(40).

Description

Microwave oven with improved cooling function

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to a microwave oven having a structure in which an air inlet of a blower fan for cooling heating elements such as a magnetron and a high voltage transformer reduces intake resistance and intake noise.

A microwave oven is a cooking utensil for heating food using microwave, which is a kind of electromagnetic wave, and is usually attached to the outer case 10 of the product and one side of the outer case 10 as shown in FIG. 1. A door 12 for opening and closing the cooking compartment, an oscillation device for scanning microwaves into the cooking compartment, a power supply for supplying high voltage power to the oscillation device, and cooling the heat generated by the oscillation device and the power supply device. It consists of a battle room with a cooling device to make it.

The oscillation device comprises a magnetron (20) for generating microwaves, and a waveguide (dopa tube) (not shown) for guiding the microwaves generated in the magnetron (20) to the cooking chamber, the power supply is a general household power supply It is composed of a rectifier (not shown) for rectifying a high-voltage transformer (30) for transforming to a high-voltage of thousands of volts to the magnetron (20) and rectifying the household AC power applied to the high-voltage transformer (30) with a DC power, Is composed of a blowing fan 40 to suck the air outside the electronic room by the rotation operation blows to the magnetron 20 and the high-pressure transformer 30 side, and a driving motor 42 for driving the blowing fan 40. (See Figure 2).

According to the microwave oven as described above, the magnetron 20 receives the boosted current through the rectifier and the high-voltage transformer 30 to generate microwaves, and the generated microwaves are injected into the cooking chamber through the waveguide to prevent food from being cooked. Heated and cooked.

In addition, when the microwave oven is operated, the blower fan 40 is rotated by the driving motor 42 so that air outside the product (microwave oven) is sucked into the so-called magnetron 20 and the high pressure transformer 30. The heat generated by the heat generating device is cooled by passing through the heat generating device, and a part of the sucked air passes through the inside of the cooking room through the air duct 44 configured inside the cooking chamber casing 60, and then is discharged to ventilate and cool the cooking chamber. The action is also performed at the same time.

The blower fan 40 constituting the cooling device in the microwave oven as described above is usually mounted on the inner rear side of the electric compartment as shown in FIG. 3 as an axial fan type, and on the rear portion 101 of the product (microwave oven). A rectangular vent panel 14 having a plurality of vent holes 14a distributed at regular intervals is attached to the inlet port due to the combination of the vent holes 14a.

Here, the reason for attaching the ventilation panel 14 is to secure a ventilation area of a predetermined size or more through a plurality of small-diameter ventilation holes 14a formed separately, and at the same time to form a ventilation opening having a large opening shape, Through this, foreign matters are introduced into the outer case 10, or the user is to prevent a problem such as inadvertently injuring his hand.

However, according to the prior art as described above, since the distribution range of the ventilation holes 14a is limited to an area corresponding to the ventilation panel 14 of a specific shape (rectangular shape), the left and right ends of the blowing fan 40 are vent holes. The formation area of 14a is exceeded, so that the so-called effective intake area where the blowing fan 40 and the ventilation hole 14a overlap is reduced than the so-called possible intake area formed by the area of the blowing fan 40.

Therefore, according to the related art, the intake resistance is generated in the intake port structure, so that the cooling action for each of the heating parts is not properly performed, and the intake noise is generated, resulting in a decrease in the operational stability and the commercial property of the microwave oven. Triggered.

The present invention has been made to solve the above-mentioned conventional problems, in line with the intake area of the blower fan, the intake efficiency is improved and the intake noise is reduced to reduce the intake noise is provided microwave oven that improves the operating stability and productability For the purpose of providing

1 is a perspective view showing the appearance of a typical microwave oven.

2 is a perspective view showing the internal structure of a microwave oven according to the prior art.

Figure 3 is a rear view showing the structure of the intake port of the microwave oven according to the prior art.

Figure 4 is a rear view showing the intake structure of the microwave oven according to the embodiment of the present invention.

Figure 5 is a side view showing the intake structure of the microwave oven according to the embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: outer case 10a: vent hole

10b: vent hole 101: rear part

102: side 12: door

14: Ventilation panel 14a: Ventilation hole

20: magnetron 30: high voltage transformer

40: blower fan 42: drive motor

44: air duct 46: rotation guide

60: galley casing

Microwave oven provided to achieve the above object is a blower as cooling the heat generated from the oscillation device for generating a microwave, a power supply for supplying a high voltage power to the oscillation device, and the oscillation device and the power supply device A cooling device comprising a drive motor for driving a fan and a blower fan, and an outer case in which each of the above devices is installed and an inlet is formed on one side thereof to allow intake of the blower fan; The intake port is characterized in that the plurality of vent holes are circularly distributed in an area exceeding the rotation radius of the blowing fan.

In addition, the other side of the outer case is characterized in that the auxiliary intake port of the plurality of ventilation holes are further formed so that the intake action from the side of the blowing fan is possible.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 4 and 5, and the same reference numerals will be given to the same parts as those in the prior art.

In the outer case of the microwave oven according to the embodiment of the present invention is formed an inlet for allowing the intake of the blower fan, as shown in Figure 4 the inlet is usually close to the blower fan 40 and the blower fan 40 It is formed on the rear portion 101 of the outer case to match the intake direction of.

The intake port is a plurality of vent holes (10a) is made of a circular distribution with an area exceeding the rotation radius of the blowing fan 40, the vent holes 10a are radially extended from the rotation center of the blowing fan 40 Sorted in the form.

In addition, the ventilation hole 10a is not formed within a predetermined range (diameter of the blower fan hub) in which suction is not performed based on the rotational center of the blower fan 40.

As shown in FIG. 5, an auxiliary air inlet having a plurality of vent holes 10b is further formed in the side surface 102 of the outer case 10 to allow intake from the side of the blowing fan 40.

Ventilation holes 10b constituting the auxiliary intake port are tangent to the side portion 102 of the outer case 10 and the suction guide 46 from the corners at which the rear portion 101 and the side portion 102 of the outer case 10 contact. It is only formed in sections within the site.

According to the embodiment of the present invention as described above, the ventilation holes (10a) constituting the intake port is distributed in the same circular shape as the shape of the blowing fan 40, the distribution range is made by the diameter of the blowing fan 40 Since the effective intake area is made wider, the effective intake area is maintained at the same level as the possible intake area.

Therefore, the intake resistance is reduced during the intake action, the intake noise is also reduced as the intake resistance is reduced.

In addition, the intake resistance of the blower fan 40 is further reduced because the intake action is also performed through the auxiliary intake hole formed on the side of the blower fan 40. The vent hole 10b constituting the auxiliary intake hole is as described above. Since it is limited only to the front portion of the suction guide 46, the air introduced into the outer case 10 through the auxiliary intake port is prevented from being discharged immediately without passing through the suction guide 46 and then undergoing a proper circulation process.

That is, according to the microwave oven according to the embodiment of the present invention because the intake action of the blower fan 40 is efficiently performed, as a result, the temperature rise of the heat generating products such as the magnetron 20 or the high-pressure transformer 30 is prevented, Moreover, as the smooth intake is performed, the intake noise generated due to the intake resistance is also significantly reduced.

As described above, the microwave oven according to the present invention has an advantage that the intake action of the blower fan is effectively performed, and thus the intake noise is also reduced, so that the operational stability and the commercial property are high.

Claims (2)

An oscillator for generating microwaves, A power supply device for supplying high voltage power to the oscillation device; A cooling device comprising a driving fan for driving a blower fan and a blower fan to cool heat generated from the oscillation device and a power supply device; Each of the above devices is installed and an outer case having an air inlet for intake of the blower fan on one side thereof. In a microwave oven comprising; The intake port is a microwave oven, characterized in that the plurality of vent holes are circularly distributed in an area exceeding the rotation radius of the blowing fan. According to claim 1, wherein the other side of the outer case A microwave oven, characterized in that an auxiliary air inlet of a plurality of ventilation holes is further distributed to allow the air intake from the side of the blowing fan.