KR100577481B1 - A mounting structure of heater for Electric oven - Google Patents

Abstract

The present invention relates to a heater mounting structure of an electric oven provided with a halogen heater and a ceramic heater provided in the electrical equipment room. The heater mounting structure of the electric oven according to the present invention includes a heater plate 340 which forms an upper surface of the cooking chamber 100 in which food is cooked and a lower surface of the electric chamber 300 in which a plurality of parts are provided; A halogen heater 320 installed at one side of the electric chamber 300 to generate radiant heat; A ceramic heater 330 installed at one side of the electric chamber 300 to generate conductive heat transferred into the cooking chamber 100; A heater porous part 342 formed on one surface of the heater plate 340 to allow the radiant heat to pass therethrough; A heater base 350 protruding upward from an edge of the heater plate 340; It is coupled to the upper surface of the heater base 350, characterized in that it comprises a heater cover (322, 332) surrounding the halogen heater 320 and the ceramic heater 330. According to the present invention as described above, the enameling operation is easily made to the lower coupling portion of the heater base, there is an advantage that the thermal efficiency of radiation or conduction heat is improved.

Electric oven, electric room, halogen / ceramic heater, heater base, heater hole

Description

A mounting structure of heater for Electric oven

1 is a side cross-sectional view of a conventional electric oven.

Figure 2 is a cross-sectional view showing a state of installation of a halogen heater of a conventional electric oven.

Figure 3 is a side cross-sectional view of the electric oven according to a preferred embodiment of the present invention.

4 is a cross-sectional view showing a state in which a halogen heater of the electric oven is installed according to a preferred embodiment of the present invention.

Figure 5 is a partial perspective view showing a heater porous portion of the electric oven according to a preferred embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100. ..... galley 120. ..... door

140. ..... Tray 160. ..... Lower Heater

200. ..... Heater chamber 220. ..... Convection fan

240. ..... Motor 250. ..... Shaft

260. ..... Convection Heater 270. ..... Backplate

280. ..... Chamber cover 282. ..... Air inlet 300. ..... Electric room 310. ..... Upper heater 312. ..... ... Halogen heater 322, 332. ..... Heater cover 330. ..... Ceramic heater 340. ..... Heater plate 342. ..... Heater heater 350. .... Heater base 352. ..... Joint 360. ..... Blow fan 380. .....

The present invention relates to an electric oven, and more particularly, to a heater mounting structure of an electric oven installed to increase the transmittance of radiant or conductive heat transferred into a cooking chamber and to maintain the strength of the pores enameled.

Electric oven is a cooker product that can cook a variety of food by increasing the output by using various types of heating sources to cook a large amount of food quickly and evenly.

1 is a side cross-sectional view of a conventional convection type electric oven.

Referring to FIG. 1, the front door 11 of the cooking chamber 10 in which food is cooked is selectively opened and closed from above and downward, and a door 11 having a window for viewing the inside of the cooking chamber 10 is installed. At the rear of 10), a heater chamber 30 is installed to suck air in the cooking chamber 10 and discharge it into the cooking chamber 10.

A control panel (not shown) formed with a plurality of operation buttons (not shown) for operating an electric oven by an external operation is installed at the upper end of the front side of the cooking chamber 10, and the blow pan 54 will be described below. An exhaust port (not shown) for discharging the heat exhausted by the outside is formed.

In addition, the heater chamber 30 includes a motor 20 for driving the convection fan 40 to be described below, and a convection fan 40 coupled to the rotating shaft 21 of the motor 20 to generate air circulation. And a convection heater 32 positioned around the convection pan 40 to generate heat, and forward to the back plate 34 that forms the rear of the cooking chamber 10, that is, the rear surface of the cooking chamber 10. A chamber cover 42 is installed to secure a space of the heater chamber 30.

In the center of the chamber cover 42 is formed a circular air access hole (42a) for sucking the air in the cooking chamber 10 by the convection fan 40, the air heated in the heater chamber 30 The convection pan 40 is discharged back into the cooking chamber 10.

The tray 12 in which the workpiece is located is installed below the cooking chamber 10, and a lower heater 80 is generated to generate heat by applying power. In addition, an upper heater 60 having the same function as the lower heater 80 is installed in an upper portion of the cooking chamber 10, that is, the electrical equipment chamber 50, and heat generated by the upper heater 60 is stored in the cooking chamber ( 10) The stirrer fan 61 to be transferred to the inside is further installed.

The electric chamber 50 includes a high voltage transformer (not shown) for generating a high voltage according to the supply of power, a high voltage capacitor (not shown) for charging a high voltage from the high voltage transformer (not shown), and the high voltage capacitor. A magnetron (not shown) for generating electromagnetic waves in response to a voltage supply from the apparatus 10 and supplying them to the cooking chamber 10, an upper fan 70 for discharging the gas in the cooking chamber 10, and the electric chamber 50. Blow fan 54 for dissipating heat to the outside is installed.

In addition, the surface of the food cooked with the microwave generated from the magnetron is brown, and the halogen heater 62 and the conduction heat transfer to the radiant heat to the inside of the cooking chamber 10 so that the cooking is made quickly. The ceramic heater 63 is installed.

Heater covers 62 'and 63' are installed on the halogen heater 62 and the ceramic heater 63 to protect the halogen heater 62 and the ceramic heater 63. The heater covers 62 'and 63 are provided. ') Is further formed with a reflector (not shown) reflecting the heat generated by the halogen heater 62 and the ceramic heater 63.

In addition, one side of an upper surface of the heater plate 64 forming an upper end of the cooking chamber 10 and forming a lower end of the electric compartment 50, more specifically, the lower portion of the halogen heater 62 and the ceramic heater 63. Blocks electromagnetic waves penetrating into the halogen heater 62 and the ceramic heater 63 from the cooking chamber 10, and radiates heat and conduction heat generated by the halogen heater 62 and the ceramic heater 63 into the cooking chamber 10. A heater porous portion 64a for permeation is formed, and the heater cover is nut-coupled to all sides of the heater porous portion 64a, and the heater base 66 surrounding the heater porous portion 64a protrudes upward.

On the other hand, looking at the operating state of the electric oven having the configuration as described above, the high frequency is radiated from the magnetron (not shown) to the cooking chamber 10 by the application of power, the upper heater 60 and the lower heater ( The heat generated from 80, the radiant heat of the halogen heater 62, and the conductive heat of the ceramic heater 63 are transferred to the cooking chamber 10.

In addition, the convection fan 40 inside the heater chamber 30 rotates by the motor 20 to suck the air in the cooking chamber 10, and is heated by the convection heater 32 and then again into the cooking chamber ( 10) Perform hot air circulation to discharge inside.

To this end, the air inside the cooking chamber 10 is sucked through the air access hole 42a processed in the rear wall of the cooking chamber 10, that is, the center of the chamber cover 42, and inside the heater chamber 30. The hot air is formed by the convection fan 40 connected by the motor 20 and the rotary shaft 21 and the convection heater 32 installed around the convection fan 40. That is, the motor 20 rotates the convection fan 40 together with the operation of the electric oven, and at the same time, the convection heater 32 operates to generate heat for heating ambient air.

The convection fan 40 sucks the surrounding air into the heater chamber 30 through the air access hole 42a in the center of the chamber cover 42 and blows the air into the cooking chamber 10. Therefore, the ambient air heated by the heat generated by the convection heater 32 circularly installed around the convection fan 40 forms the hot air forcedly circulated by the convection fan 40.

The hot air is blown back into the cooking chamber 10 by the convection fan 40 through the rear wall of the cooking chamber 10, that is, through the air access hole 42a formed in the chamber cover 42, and thus, You will experience forced convection, which supplies the heat energy needed for cooking.

In addition, the heat of the plurality of components provided in the electrical equipment room 10, that is, the electric oven is operated to form the exterior of the electrical equipment room 50 in a heated state such as the magnetron, the high pressure transformer, and the high pressure capacitor. Outside air is sucked and cooled through an intake port (not shown) formed in a plate (not shown), and an exhaust port (not shown) of the upper surface of the front of the electric compartment 50 is blown by the blow fan 54. Discharged through water).

However, the above conventional technologies have the following problems.

During operation of the electric oven, the cooking chamber 10 has a high temperature of 350 degrees or more, and recently, an enameled heater that can withstand the high temperature well by coating a glass glaze on the surface of the heater plate 64, which is the upper surface of the cooking chamber 10. I use a plate. Therefore, when the enameling operation uses an electrostatic spray method, the coupling part where the lower end of the heater plate 64 and the heater base 66 meet has a problem that enamel is hard to enamel.

In addition, self-cleaning is performed at a high temperature after the electric oven is operated. At this time, the distance between the halogen heater 62 and the ceramic heater 63 and the enameled heater pores becomes a very important factor. If too close, the thermal efficiency of radiation or conduction into the cooking chamber 10 is improved, but there is a problem that the enamel is broken due to cracks in the enameled surface of the heater porous portion.

In addition, microwaves have a wavelength of 12 cm, and energy is passed through holes smaller than that, but the amount is legally determined. Therefore, there is also a problem in that a hole size and an inter-hole distance suitable for passing the heater energy while maintaining the UL regulation value (5 mmW / cm 2) and maintaining the intrinsic properties of the enamel are required.

An object of the present invention for solving the above problems, to facilitate the enamel work on the heater base lower coupling portion, to increase the transmittance of radiant or conductive heat transmitted to the inside of the cooking chamber, the enameled heater porous portion It is to provide a heater mounting structure of the electric oven is installed to maintain the durability.

Another object of the present invention is to provide a heater mounting structure of an electric oven which is installed to properly maintain the hole size and the distance between holes of the heater porous part to prevent microwave penetration and to efficiently pass heater energy. will be.

The heater mounting structure of the electric oven according to the present invention for achieving the object as described above comprises a heater plate for forming the upper surface of the cooking chamber in which food is cooked and the lower surface of the electric compartment equipped with a plurality of parts; A halogen heater installed at one side of the electric room and generating radiant heat; A ceramic heater installed at one side of the electric field chamber and generating conductive heat transferred into the cooking chamber; A heater porous part formed on one surface of the heater plate to allow the radiant heat to pass therethrough; A heater base protruding upward from an edge of the heater plate; Coupled with the upper surface of the heater base, characterized in that it comprises a heater cover surrounding the halogen heater and the ceramic heater.

The coupling portion of the lower side of the heater base and the heater plate is characterized in that the curvature is formed.

The radius of curvature is characterized in that 2 ~ 8 mm.

The upward protrusion height of the heater base is characterized in that 6 ~ 16 mm.

And, the diameter of the heater porous portion is 6.2 ~ 7.2 mm, characterized in that the interval between each hole is 6 ~ 12 mm.

According to the present invention having such a configuration, there is an advantage that the enameling operation is easily made in the lower engaging portion of the heater base, the surface of the heater porous portion is not damaged, and the microwaves do not penetrate into the halogen and ceramic heaters.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above will be described in detail.

Figure 3 is a side cross-sectional view of the electric oven according to a preferred embodiment of the present invention, Figure 4 is a cross-sectional view showing a state in which the halogen heater of the electric oven according to the preferred embodiment of the present invention is installed. And, Figure 5 is a partial perspective view showing the heater porous portion of the electric oven according to a preferred embodiment of the present invention.

As shown in these drawings, the electric oven according to the present invention may be selectively opened and closed from the top to the front of the cooking chamber 100 where food is cooked, and a window having a window to view the inside of the cooking chamber 100 ( 120 is installed, and a heater chamber 200 is installed at the rear of the cooking chamber 100 to suck air in the cooking chamber 100 and discharge it into the cooking chamber 10.

The control panel (not shown) formed with a plurality of operation buttons (not shown) for operating the electric oven by an external operation is installed at the upper end of the front side of the cooking chamber 100, and by the blow fan 360 which will be described below. An exhaust port (not shown) for discharging the heat to be exhausted to the outside is formed.

The heater chamber 200 has a motor 240 for driving the convection fan 220 to be described below, and a convection fan 220 coupled to the rotating shaft 250 of the motor 240 to generate air circulation and the The convection heater 260 is positioned around the convection fan 220 to generate heat.

In addition, a chamber cover 280 is installed at the rear of the cooking chamber 100 to secure a space of the heater chamber 200. In more detail, a space of the heater chamber 200 is secured to the back plate 270 that forms the rear surface of the cooking chamber 100 and protrudes forward to partition the heater chamber 200 and the cooking chamber 100. Is formed.

In the center of the chamber cover 280 is formed an air access hole 282 that sucks the air in the cooking chamber 100 by the convection fan 220 in a circular shape, the air heated in the heater chamber 200 The convection pan 220 is discharged back into the cooking chamber 100.

The tray 140 in which the workpiece is located is installed below the cooking chamber 100, and a lower heater 160 is generated to generate heat by applying power. In addition, an upper heater 310 having the same function as the lower heater 160 is installed in the upper part of the cooking chamber 100, that is, the electric chamber 300, and the heat generated from the upper heater 310 is stored in the cooking chamber ( 100) the stirrer fan 312 to be delivered to the inside is further installed.

The electric field chamber 300 includes a high voltage transformer (not shown) for generating a high voltage according to the supply of power, a high voltage capacitor (not shown) for charging a high voltage from the high voltage transformer (not shown), and the high voltage capacitor. A magnetron (not shown) for generating electromagnetic waves in response to the voltage supply from the apparatus and supplying them to the cooking chamber 100, an upper fan 380 for discharging the gas in the cooking chamber 100, and the electric chamber 300. Blow fan 360 for discharging the heat to the outside is installed.

In addition, the surface of the food to be cooked with the microwave generated from the magnetron is brown, and the halogen heater 320 and conduction heat to transfer the radiant heat to the interior of the cooking chamber 100 so that the cooking is made quickly. The ceramic heater 330 is installed.

Heater covers 322 and 332 which protect the halogen heater 320 and the ceramic heater 330 are installed on the halogen heater 320 and the ceramic heater 330. On both sides of the heater covers 322 and 332 and an upper surface of the heater base 350 to be described below, a plurality of screwing fastening holes (not shown) are formed, and the inner side of the heater covers 322 and 332. In the halogen heater 320 and the ceramic heater 330 is further formed a reflector (not shown) reflecting the heat generated.

In addition, one side of an upper surface of the heater plate 340, which forms an upper end of the cooking chamber 100 and forms a lower end of the electric compartment 300, and more specifically, a lower portion of the halogen heater 320 and the ceramic heater 330. In the cooking chamber 100 to block the electromagnetic waves penetrated into the halogen heater 320 and the ceramic heater 330, radiant heat and conductive heat generated from the halogen heater 320 and the ceramic heater 330 inside the cooking chamber 100 Heater porous portion 342 is formed to pass through, the heater cover 322, 332 is nut-coupled to the four sides of the heater porous portion 342 and the heater base 350 surrounding the heater porous portion 342 is It is formed to protrude upward.

The coupling part 352 where the lower end of the heater base 350 and the heater plate 340 meet is formed to be round so that the enamel (to coat the glass glaze on the surface) may be buried during enameling. The larger the radius of the coupling portion 352, the larger the radius, the easier the enameling operation, but in view of the difficulty of injection molding, an appropriate value is required. The experimentally examined value is 5 ± 3 mm, that is, 2 to 8 mm ( It is preferable to assume the numerical value as the range of R).

In addition, radiation and conduction heat of the halogen heater 320 and the ceramic heater 330 are well transmitted to the cooking chamber 100, and the cooking chamber 100 is formed on an enameled surface of the heater porous part 342 which has been enameled. In order to prevent cracking at high temperature (temperature of self cleaning operation: 350 degrees), the height of the heater base 350 is experimentally assumed to be within a range of 11 ± 5 mm, that is, 6 to 16 mm (h). It is desirable to maintain.

The heater porous part 342 blocks the microwaves penetrating from the cooking chamber 100, increases the transmittance of heat radiated or conducted by the halogen heater 320 and the ceramic heater 330, and the heater porous part. To increase the strength of 342, and to maintain the intrinsic properties of the enamel, the diameter of each hole is maintained at 6.7 ± 0.5 mm, that is, 6.2 ~ 7.2 mm (Ф) and the distance between each hole is 9 ± 3 mm, that is, 6 ~ It is more preferable to keep it at 12 mm (d).

If the diameter? Is too large, the heat transmittance is good, but the distance d between each hole of the heater porous part 342 is too close, and the overall strength of the heater porous part 342 is weakened. Too small is the overall strength of the heater porous portion 342, but the transmittance of heat radiated or conducted to each hole is lowered, so that it is recognized as experimental data to maintain within the numerical range.

On the other hand, looking at the operating state of the electric oven having the configuration as described above, the high frequency is radiated from the magnetron (not shown) to the cooking chamber 10 by the application of the power, the upper heater 310 and the lower heater 160 Heat generated from the heat transfer, radiant heat of the halogen heater 320 and conduction heat of the ceramic heater 330 are transferred to the cooking chamber 100.

In addition, the convection fan 220 inside the heater chamber 200 rotates by the motor 240 to suck air in the cooking chamber 100, and is heated by the heater 260, and then again the cooking chamber 100. ) Perform hot air circulation to discharge inside.

To this end, the air inside the cooking chamber 100 is sucked through the air access hole 282 processed in the rear wall of the cooking chamber 100, that is, the center of the chamber cover 280, and inside the heater chamber 200. The hot air is formed by the convection fan 220 connected by the motor 240 and the rotary shaft 250 and the convection heater 260 installed around the convection fan 220. That is, the motor 240 rotates the convection fan 220 together with the operation of the electric oven, and at the same time, the convection heater 260 operates to generate heat for heating ambient air.

The convection fan 220 sucks air around the inside of the heater chamber 200 through the air access hole 282 in the center of the chamber cover 280 and blows the air into the cooking chamber 100. Therefore, the ambient air heated by the heat generated by the convection heater 260 circularly installed around the convection fan 220 forms hot air forcedly circulated by the convection fan 220.

The hot air is blown back into the cooking chamber 100 through the air access hole 282 formed in the rear wall of the cooking chamber 100, that is, the chamber cover 280 by the convection fan 220, You will experience forced convection, which supplies the heat energy needed for cooking.

In addition, the heat of the plurality of components provided in the electrical equipment room 100, that is, the electric oven is operated to form the exterior of the electrical equipment room 300 in a heated state such as the magnetron, the high pressure transformer and the high pressure capacitor. Outside air is sucked and cooled through an intake port (not shown) formed in a plate (not shown), and an exhaust port (not shown) of the upper surface of the front of the electric compartment 300 is blown by the blower fan 360. Discharged through water).

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention may be made by those skilled in the art within the above technical scope.

Heater mounting structure of the electric oven according to the present invention as described in detail above, round the bottom coupling portion of the heater base to form a radius of 2 to 8 mm, and the upper protrusion height of the heater base 6 to 16 mm The size of each hole and the distance between each hole of the heater porous part were maintained at Ф6.2 to 7.2 mm and 6 to 12 mm.

Therefore, the enamel can be well adhered to the coupling portion of the heater base when the electrostatic spray method is used, it is possible to increase the thermal efficiency of thermal energy radiated or conducted from the halogen heater and the ceramic heater into the cooking chamber. In addition, while blocking microwaves penetrating into the halogen heater and the ceramic heater in the cooking chamber, the transmittance of the thermal energy radiated or conducted can be increased, the strength of the heater pores can be increased, and the unique properties of the enamel can be maintained. The effect is expected.

As a result, the consumer's confidence in the product is expected to increase the desire to buy products.

Claims (5)

delete A heater plate which forms an upper surface of the cooking chamber in which food is cooked and a lower surface of the electric compartment including a plurality of parts; A halogen heater installed at one side of the electric room and generating radiant heat; A ceramic heater installed at one side of the electric field chamber and generating conductive heat transferred into the cooking chamber; A heater porous part formed on one surface of the heater plate to allow the radiant heat to pass therethrough; A heater base protruding upward from an edge of the heater plate; A coupling part formed to be rounded at a position where the lower side of the heater base and the heater plate meet each other; Combined with the upper surface of the heater base, the heater mounting structure of the electric oven comprising a heater cover surrounding the halogen heater and the ceramic heater. According to claim 2, The radius of curvature of the coupling portion, Heater mounting structure of electric oven, characterized in that 2 ~ 8 mm. The upward protrusion height of the heater base according to claim 2, Heater mounting structure of electric oven, characterized in that 6 ~ 16 mm. The diameter of the heater porous portion is 6.2 to 7.2 mm, Heater mounting structure of the electric oven, characterized in that the interval between each hole is 6 ~ 12 mm.

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