KR20010096941A - Heating apparatus for microwave oven - Google Patents

Abstract

The present invention relates to a heating apparatus of a microwave oven, and the present invention provides a heater for supplying heat toward the inside of the cooking chamber to cook food provided in the cooking chamber, and radiant energy installed around the heater to radiate from the heater to the cooking chamber. Reflecting means for reflecting so as to supply all toward the, the reflecting means is a reflecting plate which is installed around the heater and formed with a plurality of holes for passing air to one side thereof, and fixing means for fixing the reflecting plate to the cooking chamber wall surface It is possible to maximize the use efficiency of the heat energy generated from the heater, that is, convection energy and radiant energy to increase the heat efficiency of the heater, and consequently to improve the cooking quality and cooking speed of the food to improve the cooking performance of the microwave oven. It is.

Description

HEATING APPARATUS FOR MICROWAVE OVEN}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly, to a heating apparatus of a microwave oven that is installed in a microwave oven and supplies heat to a cooking chamber.

In general, the microwave oven is a cooker using the principle that the water molecules of the food provided in the metal box to generate heat by its molecular movement using the electromagnetic wave of 2,450MHz.

1 is a perspective view showing a structure of a microwave oven according to the prior art, Figure 2 is a side cross-sectional view of the main portion of the microwave oven is shown a heating apparatus of the microwave oven according to the prior art.

1 and 2, the microwave oven is divided into a main body 10, which is divided into a cooking chamber CR in which food is cooked, and an electric equipment chamber ER in which various electric appliances are installed, and the main body 10. It is installed on the front of the) consists of a door 20 for opening and closing the cooking chamber (CR).

Here, the electric chamber ER is provided with a magnetron 11 for oscillating high frequency and a high voltage transformer 12 and a high voltage capacitor 13 for applying a high voltage to the magnetron 11.

In addition, a rear surface of the electric chamber ER is provided with a heat radiating fan 14 for sucking external air to cool the electric appliance and a driving motor for driving the heat radiating fan 14.

In addition, the cooking chamber CR is provided with a tray 15 on which food is seated, and the transparent window 21 is provided in the door 20 so that the inside of the cooking chamber CR can be seen even when the door 20 is closed. Is fitted.

In addition, a heater 16 and a heater 16 capable of heating food by supplying heat into the cooking chamber CR during cooking of food between the outer rear surface of the cooking chamber CR and the case 10 ′ from the outside. Heater housing 17 for protection is installed.

In addition, the rear of the cooking chamber CR has a plurality of discharge holes 18a for introducing the heat of the heater 16 into the cooking chamber CR, and the air A inside the cooking chamber CR where cooking of food is finished. A plurality of suction holes 18b for suctioning back to the heater 16 side are formed.

In addition, a blower fan 19 for forcibly flowing the air A to the heater housing 17 so that the air A continues to circulate through the discharge hole 18a and the suction hole 18b of the rear side of the cooking chamber CR. ) And a driving motor for driving the blower fan 19.

The heating apparatus of the microwave oven configured as described above is operated as follows.

First, when the blowing fan 19 is operated when cooking food using the heater 16, the air inside the cooking chamber CR is sucked through the suction hole 18b by the rotational force of the blowing fan 19. Flows into the side.

Thereafter, the air A introduced into the heater housing 17 is heated through heat exchange with the heater 16 while passing through the heater 16 and then again inside the cooking chamber CR through the plurality of discharge holes 18a. Is discharged.

The air A discharged into the cooking chamber CR as described above transfers its heat to food to heat the food, and is then introduced into the heater housing 17 through the suction hole 18b to perform the above process. Will be repeated.

In the heating apparatus of the microwave oven constructed and operated as described above, the sum of the heat energy generated from the heater 16 is the sum of the convective energy and the radiant energy. Therefore, in order to improve the cooking quality and the cooking speed of the food, the convection energy and the radiant energy from the heater 16 must be appropriately balanced.

However, the microwave heating apparatus according to the prior art as described above does not have any structure for efficiently using the heat energy generated from the heater 16, so that the utilization efficiency for both convective energy and radiant energy is inferior. The efficiency of the heater 16 is lowered, and as a result, there is a problem that the cooking performance of the microwave is deteriorated.

The object of the present invention devised in view of the problems described above, by providing a structure that can maximize the utilization efficiency of the heat energy, that is, convection energy and radiant energy generated from the heater, the heat efficiency of the heater is increased to improve the cooking quality and It is to provide a heating apparatus of the microwave oven to improve the cooking speed.

1 is a perspective view showing the structure of a microwave oven according to the prior art,

2 is a side sectional view of a main portion of a microwave oven, in which a heating apparatus of a microwave oven according to the prior art is shown;

3 is a main sectional side view of the microwave oven in which the heating device of the microwave oven according to the present invention is shown;

4 is a perspective view showing the structure of a reflecting plate according to the present invention.

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

50: cooking chamber 51: heater

53a: discharge hole 53b: suction port

55: circulation duct 57: blowing fan

60: reflecting means 61: reflecting plate

61a: hole

In order to achieve the object of the present invention as described above, a heater for supplying heat toward the interior of the cooking chamber to cook food provided in the cooking chamber, and radiant energy installed around the heater and radiated from the heater toward the cooking chamber. There is provided a heating apparatus for a microwave, including a reflecting means for reflecting to supply all.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a side cross-sectional view of a main portion of a microwave oven in which the heating apparatus of the microwave oven according to the present invention is shown, and FIG.

The heating apparatus of the microwave oven according to the present invention, as shown in Figure 3, the heater 51 for cooking the food (F) provided in the cooking chamber 50 by supplying heat toward the interior of the cooking chamber 50, and It is configured to include a reflecting means 60 is installed around the heater 51 and reflects the radiant energy emitted from the heater 51 to be supplied all toward the cooking chamber 50.

Here, the heater 51 is installed on the upper side of the cooking chamber 50, and a plurality of heat injecting the heat of the heater 51 toward the cooking chamber 50 on the upper surface of the cooking chamber 50 corresponding to the heater 51. Discharge holes 53a are formed in a mesh structure.

In addition, a suction port 53b is formed at a rear surface of the cooking chamber 50 to suck air A ′ inside the cooking chamber 50 after the cooking of the food F to the heater 51. 53b) and the discharge hole 53a are connected by the circulation duct 55 provided above and behind the cooking chamber 50. As shown in FIG.

In addition, the circulation duct 55 is a blowing air forcibly flowing the air (A ') so that the air (A') in the cooking chamber 50 is continuously circulated through the inlet (53b) and the discharge hole (53a) A fan 57 and a drive motor for driving the blower fan 57 are installed.

In this case, a cross flow fan is generally used as the blower fan 57.

In addition, the reflecting means 60 is composed of a reflecting plate 61 provided around the heater 51, and a fixing means 63 for fixing the reflecting plate 61, the reflecting plate 61 is an arc-shaped cross section Although not formed or shown in the drawings may be formed to have a rectangular or trapezoidal cross section.

In addition, the reflecting plate 61 has a plurality of holes 61a for passing air A 'which is moved to the heater 51 side by the blowing fan 57 so that the efficiency of convective energy emitted from the heater 51 is improved. ) Is formed.

Here, the holes 61a are located in the direction in which the air A 'is supplied by the blower fan 57 considering both the reflectance of the radiant energy by the reflecting plate 61 and the passage rate of the air A'. It is preferably formed only in the half portion of the blowing fan 57 side.

In addition, a fixing screw for fastening the reflecting plate 61 to the wall surface of the cooking chamber 50 is mainly used for the fixing means 63, and fastening holes 61b to which the fixing screw is fastened to both lower ends of the reflecting plate 61. Is formed.

In the above description, reference numeral 58 denotes a door installed at the front of the cooking chamber 50 to open and close the cooking chamber 50, and reference numeral 59 is installed inside the cooking chamber 50 to allow food F to be seated. Represents a tray.

In the heating apparatus of the microwave oven according to the present invention configured as described above, the radiant energy emitted from the heater 51 when cooking food using the heater 51 through the discharge hole 53a of the upper surface of the cooking chamber 50. 50 is supplied to the inside to cook the food (F) provided in the cooking chamber (50).

At this time, the energy emitted above the heater 51 of the radiant energy emitted from the heater 51 is reflected by the reflecting plate 61 is supplied toward the food (F) in the cooking chamber 50.

While the food F is cooked by the radiant energy of the heater 51 as described above, the food F is also cooked by the convective energy emitted from the heater 51.

That is, the food F inside the cooking chamber 50 is also heated by the convection energy of the heater 51 and circulated through the discharge hole 53a, the suction port 53b, and the circulation duct 55. ) Is heated.

Specifically, first, when the blowing fan 57 in the circulation duct 55 is operated, the air inside the cooking chamber 50 is circulated through the suction port 53b of the rear side of the cooking chamber 50 by the rotational force of the blowing fan 57. It flows into the duct 55 side.

Thereafter, the air A 'introduced into the circulation duct 55 passes through the holes 61a of the reflecting plate 61 to the heater 51 and thus the air A' moved to the heater 51. Is heated by receiving convective energy of the heater 51.

As described above, the air A 'heated through the heat transfer with the heater 51 is supplied into the cooking chamber 50 through the discharge hole 53a to transfer its heat to the food F, thereby heating the heater 51. The food (F) is cooked together with the radiant energy emitted from.

Subsequently, the air A 'having its heat deprived for cooking the food F again flows into the circulation duct 55 through the suction port 53b to repeat the above process.

At this time, the air A 'supplied to the heater 51 through the holes 61a of the reflecting plate 61 is heat exchanged with the heater 51 using the wind speed provided by the blowing fan 57, that is, the heater. Air A 'around the heater 51 heated by convective heat transfer from 51 induces a good inflow into the cooking chamber 50.

In addition, the air A 'passing through the reflecting plate 61 also serves to cool the reflecting plate 61 while passing through the holes 61a of the reflecting plate 61.

That is, the reflecting plate 61 reflects the radiant energy emitted from the heater 51 and absorbs a part of the reflecting plate 61 so that it is easy to be overheated. As the air A 'passes through the heat of the reflecting plate 61, It takes away and cools the said reflecting plate 61.

Therefore, even if the microwave oven is used for a long time, the cooling of the reflecting plate 61 is naturally performed by the air A ', thereby maintaining the reflection characteristics of the reflecting plate 61 without a separate cooling device, and at the same time, reflecting plate 61 due to overheating ) Is also prevented.

The heating apparatus of the microwave oven constructed and operated as described above is suitable for a structure in which radiant energy is mainly used among the heat energy emitted from the heater 51 for cooking food F. As the heater 51, a halogen tube, It is recommended to use a type in which radiant energy occupies about 70% of the total energy and convective energy occupies the remaining 30%, such as a heater using a ceramic tube, a quartz tube, or a micron heater.

As described above, the heating apparatus of the microwave oven according to the present invention can maximize the use efficiency of heat energy generated from the heater 51, that is, radiant energy and convection energy, thereby increasing the thermal efficiency of the heater 51, Therefore, the cooking quality and cooking speed of the food is improved, there is an advantage that the cooking performance of the microwave is improved.

Claims (3)

And a heater for supplying heat toward the inside of the cooking chamber to cook food provided in the cooking chamber, and reflecting means installed around the heater to reflect all radiant energy emitted from the heater toward the cooking chamber. Microwave heating device. The heating apparatus according to claim 1, wherein the reflecting means comprises a reflecting plate installed around the heater and fixing means for fixing the reflecting plate to the wall surface of the cooking chamber. The heating apparatus according to claim 2, wherein a plurality of holes are formed in the reflecting plate to allow air to pass therethrough.