KR20070108298A - Cooking device - Google Patents

Abstract

A cooking device is provided to cool an upper surface of an oven door by installing an upper cover having an external air inlet for allowing cold external air to meet with heated air flow discharged from an exhaust duct. A cooking device comprises an oven body, an oven door(200), an exhaust duct(330) and an upper cover(240.) The oven door is coupled to the oven body to open/close the oven body. The exhaust duct exhausts the air which is heated while flowing in the oven body. The upper cover is provided at an upper part of the oven door and has an external air inlet(245) that allows the external air to be introduced toward the heated air current by a pressure difference the external air and the heated air. The exhaust duct has a diffusion part having a variable sectional width and a linear part having a uniform sectional width.

Description

       Cooking Device

1 is a plan view schematically showing an installation state of a cooking appliance according to the prior art.

2 is a cross-sectional view of an embodiment of a cooking appliance according to the present invention.

Figure 3 is a partial perspective view showing the top of the cooking appliance according to the invention.

Figure 4 is a state diagram schematically showing the flow of air discharged from the cooking appliance according to the invention.

5 is a perspective view showing another embodiment of the upper cover provided in the cooking appliance according to the present invention.

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

100: oven body 110: lower housing

170: cooking space 180: main body housing

200: oven door 240: top cover

243: diffusion preventing member 245: air inlet

300: upper housing 310: blowing fan

320: intake duct 330: exhaust duct

350: front panel

The present invention relates to a cooking appliance, and more particularly, to a cooking appliance capable of cooling the oven door more efficiently.

In general, there are a variety of products, such as oven, microwave oven. A microwave oven is a device that includes only a magnetron or cooks food using a magnetron and a heater. In addition, the oven is a cooking utensil designed to cook food by drying and sealing the cooking material after heating.

The oven includes a cooking apparatus using electricity as a heat source for supplying heat to food and a gas oven using gas fuel as a heat source.

The cooking apparatus is a device configured to heat various foods in the oven by using a heater that generates electricity by electricity (for example, a ceramic heater, a grill grill or a halogen heater, etc.). .

In particular, the cooking appliance has fast response speed, high thermal efficiency, and does not generate flame, which is much safer from the fire than the gas oven, and has gained much response from consumers.

Referring to Figure 1, a conventional cooking appliance will be briefly described.

The cooking appliance may be used in a form in which the whole is exposed to the outside, or may be used in the form of a built-in type installed in the inner wall of a building.

The cooking apparatus includes an oven body (2) for forming a cooking space therein, a oven door (8) for opening and closing the oven body, and a blowing fan (3) for discharging air through the inside of the oven body. It includes. When the cooking appliance is installed inside the closet 1 forming a predetermined space, the oven door 8 is installed to face the front.

In addition, the upper part of the oven body 7 is provided with an electric equipment compartment 7 is installed. An exhaust duct 4 is formed inside the electric compartment to guide the flow of air discharged from the oven body. Of course, one side of the exhaust duct (4) is connected to the blowing fan (3), the other side is formed with a discharge port (6) connected to the outside. In addition, both sides of the discharge port 6 is provided with a connecting member 5 for connecting the oven door 8 and the electric chamber 7.

The cross-sectional width of the exhaust duct 4 is formed to increase toward the oven door 8 in the blowing fan. Therefore, the exhaust duct 4 continuously diffuses air from the blowing fan toward the oven door.

The heated air discharged from the exhaust duct 4 is discharged to the outside while maintaining the flow direction of air as it is. At this time, the heated air directly hits the closet or indirectly heats the closet 1. Then, a problem occurs that the closet 1 is warped by the heat of the heated air.

In addition, since the heated air discharged from the exhaust duct 4 is discharged to the outside via the upper surface of the oven door 8, the oven door is heated.

The present invention is to solve the above-described problems, an object of the present invention is to provide a cooking apparatus capable of cooling the oven door efficiently.

Another object of the present invention is to provide a cooking apparatus capable of preventing damage to a closet in which a cooking apparatus is housed in a cooking apparatus used in a built-in form.

Another object of the present invention is to provide a cooking device capable of reducing the flow resistance of the air flowing inside the cooking appliance.

In order to achieve the above object, the present invention is combined with the oven body to form a cooking space for cooking food, the oven body, the oven door for opening and closing the oven body, while passing through the interior of the oven body An exhaust duct for discharging the heated air and an outside air inlet for allowing the outside air to be sucked into the air stream of the heated air due to a pressure difference between the heated air and the outside air, and an upper cover provided at an upper portion of the oven door It provides a cooking appliance comprising a.

The exhaust duct may be installed above the oven door, and the exhaust duct may include a diffuser having a variable cross-sectional width and a straight portion having a constant cross-sectional width.

The cross-sectional height of the diffusion portion is preferably smaller toward the direction in which the heated air is discharged.

The upper cover is formed to be stepped with the diffusion preventing member and the diffusion preventing member to prevent the air discharged from the exhaust duct to the left and right sides of the oven door to form a part of the discharge port through which the air is discharged May contain more panels.

The outside air inlet may be provided in a groove shape on an upper surface of the diffusion preventing member to communicate with the outlet.

In addition, the outside air inlet may include ribs protruding from the upper surface of the diffusion preventing member to form a predetermined air flow path.

The cooking appliance may further include an intake duct separately installed with the exhaust duct while having a predetermined distance from the exhaust duct.

Hereinafter, with reference to the accompanying drawings, it will be described in detail preferred embodiments of the cooking apparatus according to the present invention.

Referring to Figures 2 and 3, the cooking apparatus according to an embodiment of the present invention will be described.

The cooking apparatus includes an oven body 100 having a cooking space 170 for cooking food, an oven door 200 for opening and closing the oven body, and an upper housing in which various parts for controlling the cooking appliance are installed. 300.

The oven door 200 is hinged to the oven body 100 is installed on the front of the oven body. In addition, the upper housing 300 is installed on the upper portion of the oven body, the front surface of the upper housing is located above the oven door 200.

In order to install the cooking appliance in a built-in type, the oven main body 100 is typically housed in a closet, and the front of the oven door 200 and the upper housing are exposed to the outside.

The oven body 100 includes a main body housing 180 that forms a cooking space 170, a lower housing 110 formed below the main housing 180, and a heater that emits radiant heat to cook the food. 120, 150).

Thermal energy generated by the heater is transferred to the food by convection or radiation. The heaters include a first heater 150 installed at an upper portion of the cooking space 170 and a second heater 120 installed at a lower portion of the cooking space.

The first heater 150 emits infrared rays to heat the food and is mainly used to bake food. The first heater 150 is preferably fixed to the upper portion of the cooking space. Of course, the first heater may be installed to be movable in the upper portion of the cooking space. The second heater 120 is installed in the lower housing 110, and auxiliary heat supply to the food placed in the cooking space 170.

In addition, the oven body is provided with a fan 130 for evenly distributing the heated air in the cooking space 170. Specifically, the pan 130 is located on the opposite side (right side of the drawing) of the oven door 200 with respect to the cooking space 170.

In addition, a driving device 140 for driving the fan is installed at one side of the fan 130. Specifically, the driving device 140 is installed in the rear space of the oven body partitioned from the cooking space 170.

The oven door 200 includes a door frame 220 forming an outer edge, a door glass installed inside the door frame, and a door handle 230 provided in an outward direction of the door frame 220. In addition, a hinge 257 is installed below the oven door to allow the oven door 200 to be rotatable at the bottom of the oven body.

The door glass is made of a transparent material so that a user can check the inside of the cabinet. The door glass may include an outer glass 210 forming an outer surface of the oven door 200, an inner glass 251 forming an inner surface, and at least one intermediate portion between the outer glass 210 and the inner glass 251. Glasses 252 and 253.

In the present embodiment, the glass 2 is installed in the middle glass 252, 253, the glass is installed in close proximity to the outer glass 210 of the middle glass (252, 253) is the first intermediate glass 253, The glass that is installed close to the inner glass 251 is called a second intermediate glass 252. Meanwhile, in the present embodiment, a total of four glasses are installed, including two pieces of intermediate glasses 252 and 253, but the number of glasses to be installed is not limited thereto.

In addition, an opening 255 is formed at the bottom of the oven door 200 to allow outside air to flow into the oven door 200, and inside the oven door 200, the outside air introduced from the bottom of the oven door 200. The outside air suction passages A, B, and C flowing through the oven door 200 are formed.

Hereinafter, a flow path formed between the first external air suction flow path A (that is, between the outer glass 210 and the first intermediate glass 253) in order from the outside of the oven door 200 in the order in which the door glass is installed. ), The second external air suction flow path (B), and the third external air suction flow path (C).

In addition, the first and second external air suction passages A and B communicate with the intake duct 320 provided in the upper housing at the upper end of the oven door 200. Therefore, the cold outside air introduced from the lower portion of the oven door 200 flows to the upper end of the oven door 200 along the first and second outside air suction passages A and B and flows into the intake duct 320.

Here, the outside air suction passages (A, B, C) is not formed separately, it is preferable to utilize the space inside the oven door 200, that is, the space between the door glass. Although the oven door 200 and the door glass are heated by heat transfer from the cooking space 170, the door glass may be cooled while cold outside air flows along the outside air suction passages A, B, and C. This is to eliminate the risk of the user getting burned.

In addition, an opening and closing member 161 for selectively opening and closing the third outside air suction passage C is installed at an upper end of the third outside air suction passage C. One side of the opening and closing member 161 is provided with an opening and closing member control device 160 for opening and closing the opening and closing member 161.

When the opening and closing member 161 closes the third suction passage C, the third outside air suction passage C forms a closed space. At this time, the third outside air suction flow path (C) is formed between the second intermediate glass 252 and the inner glass 251 as a completely insulated space to effectively block the heat transmitted from the cooking space 170. Thus, the heat loss in the cooking space 170 is minimized.

In addition, although not shown, a gasket (not shown) may be installed at the front edge of the cooking space 170 which is in contact with the oven door 200. When the gasket closes the oven door 200, the oven door 200 is in close contact with the edge of the cooking space 170, thereby preventing the heat inside the cooking space 170 from leaking to the outside.

In addition, a cover panel 241 is installed at the upper portion of the door glass to guide the outside air guided through the outside air suction passages to the intake duct 320. The lower surface of the cover panel is a surface in direct contact with external air, and is inclined at a predetermined angle so that the air is less resistant. Of course, the bottom surface of the cover panel may be formed in a curved surface to smoothly connect the outside air intake passages (A, B, C) and the intake duct (320).

On the other hand, the upper housing 300 is a front panel 350 positioned on the top of the oven door, a top plate 361 coupled to the front panel, a back plate 363 to form the upper housing together with the top plate and A base plate 327. In addition, the inside of the upper housing 300, the blowing fan 310 for the circulation of air flowing in the cooking apparatus, the intake duct 320 and the exhaust duct 330 connected to the blowing fan 310, the cooking The control device 340 for controlling the overall function of the device is installed.

In addition, a control panel 353 having buttons for controlling the cooker is installed on the front surface of the front panel 350. The lower surface of the front panel together with the upper surface of the cover panel forms an outlet 335 through which the air inside the upper housing is discharged to the outside.

In addition, the blowing fan 310 supplies the outside air introduced through the intake duct 320 into the upper housing 300, and various electrical appliances installed in the upper housing 300 and the upper housing 300 (not shown). C) is cooled, and the air inside the upper housing 300 is guided to the exhaust duct 330 to be forced out.

A double suction centrifugal fan may be used as the blower fan 310 to be connected to the intake duct 320 and the exhaust duct 330 to force air. Of course, the sirocco fan 130 may be used as the blowing fan 310.

A slot (not shown) into which outside air is introduced is formed at a portion where the top plate 361 and the front panel 350 are coupled to each other. In addition, a slot (not shown) of a predetermined shape is formed at a portion where the top plate 361 and the back plate 363 are coupled to each other. Therefore, when the blower fan 310 is operated, external air is introduced into the upper housing 300 while passing through the slots by the suction force of the blower fan 310.

Of course, the outside air may be sucked into the upper housing 300 by forming a plurality of holes on the top surface or the outer surface of the back plate of the top plate. The outside air introduced through the slots cools the electronic devices installed inside the upper housing more effectively.

On the other hand, the exhaust duct 330 includes a diffusion portion 331 having a variable cross-sectional width and a straight portion 333 having a constant cross-sectional width. The diffusion part 331 communicates with the blowing fan 310, and the straight part 333 communicates with an outlet 335 through which heating air is discharged to the outside.

The cross-sectional height of the diffusion portion is formed to be smaller toward the direction of the straight portion 333, the cross-sectional width of the diffusion portion is formed to be larger toward the direction of the straight portion 333. do. In addition, the cross-sectional width of the straight portion has a width substantially the same as the width of the outlet. This is to allow the air flowing in the straight portion to be discharged to the outside while maintaining the flow direction.

Of course, the exhaust duct may have a diffusion portion having an increased cross-sectional width, a straight portion having a constant cross-sectional width, and a converging portion having a reduced cross-sectional width. In this case, the diffusion part communicates with the blowing fan, the convergence part communicates with the discharge port, and the straight line part may be installed at a portion connecting the diffusion part and the convergence part.

In addition, the intake duct 320 also has substantially the same shape as the exhaust duct 330 having a diffusion portion and a straight portion. Of course, the intake duct 320 may have a different shape from the exhaust duct. Here, the shapes of the intake duct and the exhaust duct may be differently determined depending on the type of the blowing fan, the size of the blowing fan, the position at which the blowing fan is installed, the shape of the discharge port and the outside air inflow passage.

In addition, the intake duct 320 and the intake duct 320 may be installed adjacent to each other, but may be separated and installed at a predetermined interval. If the intake duct and the exhaust duct are installed adjacently with one separator, they will be installed with substantially the same shape. Of course, when the exhaust duct 330 and the intake duct 320 are separately formed, a separate air flow path may be formed to form different cross-sectional areas of the exhaust duct and the intake duct. For example, if the cross-sectional area of the exhaust duct through which a relatively large amount of air flows is formed larger than the cross-sectional area of the intake duct, the flow of the discharged air will be smooth.

On the other hand, the upper cover 240 is provided on the upper surface of the oven door having a cover panel 241 which partially forms the outlet of the air discharged from the upper housing. The upper cover 240 is external due to a pressure difference between the diffusion preventing member 243 and the heating air and the external air to prevent the air discharged from the exhaust duct 330 is diffused to the left and right sides of the oven door. It further includes an outside air inlet 245 for allowing air to be sucked into the air stream of the heated air. The diffusion preventing member 243 is prevented from being diffused to the left and right sides of the oven door when the heated air is discharged to the outside through the outlet 335 to prevent the closet on which the cooker is installed is heated. will be.

The diffusion preventing member 243 is installed at both ends of the cover panel 241, and is provided to be stepped with the cover panel 241. Preferably, the diffusion barrier member 243 and the cover panel 241 are integrally molded. This is because, if a gap exists between the diffusion preventing member 243 and the cover panel 241, the heated air may be discharged between the gap to directly hit the closet.

The outside air inlet 245 is provided in a groove shape on an upper surface of the diffusion member. The outside air inlet 245 communicates with the outside and serves as a passage for allowing the outside air to move to the air stream of the heating air.

Referring to Figure 4, the flow of the air discharged through the exhaust duct of the cooking appliance according to the present invention will be described.

As described above, the exhaust duct 330 includes a diffusion part 331 communicating with the blowing fan and a straight part 333 communicating with the outlet 335. In addition, both ends of the discharge port is provided with a diffusion preventing member 243, the upper portion of the diffusion preventing member 243 is an outside air inlet 245 that serves as a passage for inhaling the external air present around the oven door It is provided.

The heated air discharged to the outside through the exhaust duct 330 first passes through the diffusion part 331 and then passes through the straight part 333 extended with the diffusion part. When the heated air is discharged to the outside while passing through the straight portion 333, the heated air has a predetermined speed. On the other hand, the outside air existing outside the diffusion preventing member 243, that is around the oven door is in a stopped state.

At this time, the heating air and the external air passing through the straight portion 333 has a speed difference, which causes a pressure difference of air. That is, the outside air in a stationary state has a high pressure, the outside air is sucked into the air flow of the heated air through the outside air inlet 245.

The mixed air mixed with the heated air and the outside air is lowered in temperature, and the air having a lower temperature transmits a smaller amount of heat to the closet surrounding the cooker and cools the upper surface of the oven door. Will be.

2 to 4, the process of cooling the cooking appliance according to the present invention will be described.

When the blower fan is driven to cool the cooker, the outside air is introduced into the cooker by the suction force of the blower fan. Specifically, the outside air is introduced into the cooking appliance through the openings 255 formed in the oven door, the slots formed in the upper housing and the lower housing.

The outside air introduced through the opening 255 is introduced into the intake air duct 320 via the outside air suction flow path (). At the same time, outside air flows into the upper housing through slots formed between the top plate and the front panel or between the top plate 361 and the back plate 363. In addition, the air introduced through the slot formed in the lower housing is introduced into the upper housing via the space formed on the rear portion of the cooking space.

The outside air introduced into the outside air intake passages A, B, and C is heated while cooling the door glass, and the outside air introduced through the slot of the lower housing is heated while cooling the driving device 140. In addition, the external air introduced through the slot formed in the upper housing 300 is heated while cooling the components installed in the upper housing.

Thereafter, the heated air heated while passing through the inside of the cooking appliance is discharged to the outside through the exhaust duct. Specifically, the heated air discharged to the outside through the exhaust duct 330 first passes through the diffusion portion 331 of the exhaust duct connected to the blowing fan, and passes through the diffusion portion and the straight portion 333 extended. do.

At this time, the heated air passing through the straight portion 333 and the external air existing outside the diffusion preventing member have a speed difference, which causes a pressure difference of air. As a result, the outside air having a pressure higher than the heating air is sucked into the airflow of the heating air through the outside air inlet 245 to cool the upper surface of the oven door.

Referring to Figure 5, another embodiment of the upper cover provided in the cooking appliance according to the present invention will be described.

Like the upper cover used in the embodiment of the cooking appliance described above, the upper cover 24000 according to the present embodiment is installed on the upper portion of the oven door (see 200 of FIG. 2). However, unlike the above-described embodiment, the upper cover according to the present embodiment includes a rib 2450 forming a separate flow path to allow the outside air to be sucked.

Specifically, the upper cover 2400 is a cover panel 2410 forming a part of the outlet for discharging the heating air, the diffusion preventing member 2430 provided at both ends of the cover panel 2410, and the diffusion prevention It includes a plurality of ribs 2450 protruding from the upper surface of the member (2430).

The upper end of the rib comes into contact with the front panel of the upper housing (see 350 in FIG. 3), and a predetermined air flow path 2251 is formed by the ribs and the front panel. Of course, the air passage 2251 is in communication with an outlet (see 335 of FIG. 2) through which heated air is discharged.

Accordingly, when heated air is discharged from the exhaust duct outlet, the cold air stopped outside the oven door is sucked through the air passage 2251 and mixed with the heated air. As a result, the temperature of the air passing through the upper surface of the oven door is lower than the heating air, thereby cooling the upper surface of the oven door. In addition, the heat energy transmitted to the closet through the side of the oven door is also reduced.

Meanwhile, an inclined portion 2431 having a predetermined slope is formed at a portion where the cover panel and the diffusion preventing member 2430 are connected to each other. The inclined portion 2431 serves to prevent vortex generation that may occur when external air introduced through the air flow passage 2451 and air discharged from the exhaust duct meet.

In addition, the present invention is not limited to the above-described embodiment, and the shapes of the inclined portion and the diffusion preventing member may be variously modified. For example, the shape of the diffusion preventing member may be formed so that the width is narrowed while drawing a curved surface in the air discharge direction. Specifically, the width of the second side of the diffusion member located in the opposite direction of the exhaust duct may be longer than the width of the first side of the diffusion preventing member facing the exhaust duct so that the width of the discharge port is reduced. have.

On the other hand, both ends of the upper cover is provided with a coupling member 2470 for coupling with the oven door. The coupling member 2470 includes a first extension portion 2471 and a second extension portion 2473 and a coupling hole 2471a and 2471b formed in the first extension portion 2471 extending under the diffusion preventing member. It includes.

The first extension part 2471 and the second extension part 2473 are formed at both ends of both ends of the diffusion barrier member 243 and between the first extension part 2471 and the second extension part 2473. The upper edge (not shown) of the oven door is located. The second extension part is hooked with the oven door, and the coupling holes 2471a and 2471b formed at the first extension part are screwed with the oven door. Of course, the first extension may also be hooked with the oven door.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications without departing from the spirit of the present invention, and such modifications are within the scope of the present invention.

The effects on the cooking appliance according to the present invention are as follows.

First, according to the present invention, there is an advantage that the upper surface of the oven door can be cooled by installing an upper cover having an outside air inlet to allow external cool air to flow into the air flow of the heated air discharged from the exhaust duct.

Second, according to the present invention, by providing an exhaust duct having a diffusion portion having a variable cross-sectional width and a straight portion having a constant cross-sectional width, it is possible to prevent the heating air from directly hitting the closet.

Third, according to the present invention, there is an advantage in that the flow path resistance can be reduced by installing an exhaust duct in which the cross-sectional height of the diffusion portion having the variable cross-sectional width decreases in the direction in which the heated air is discharged, thereby reducing the change in the actual flow cross-sectional area.

Claims (7)

An oven body forming a cooking space for cooking food; An oven door coupled to the oven body and configured to open and close the oven body; An exhaust duct through which the heated air is discharged while passing through the oven body; And, And an external air inlet for allowing the external air to be sucked into the airflow of the heated air due to the pressure difference between the heated air and the external air, and comprising an upper cover provided above the oven door. The method of claim 1, The exhaust duct is installed on the upper portion of the oven door, the exhaust duct comprises a diffuser having a variable cross-sectional width and a straight portion having a constant cross-sectional width. The method of claim 2, The height of the cross-section of the diffusion portion becomes smaller toward the direction in which the heating air is discharged. The method according to any one of claims 1 to 3, The upper cover is formed to be stepped with the diffusion preventing member and the diffusion preventing member to prevent the air discharged from the exhaust duct to the left and right sides of the oven door to form a part of the discharge port through which the air is discharged A cooking appliance further comprising a panel. The method of claim 4, wherein The outside air inlet is provided in the groove shape on the upper surface of the diffusion preventing member is in communication with the outlet. The method of claim 4, wherein The outside air inlet comprises a rib protruding from the upper surface of the diffusion preventing member to form a predetermined air flow path. The method of claim 4, wherein And an intake duct separate from the exhaust duct and having a predetermined distance from the exhaust duct.

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