KR960002804B1 - Heating apparatus - Google Patents

Abstract

No content.

Description

Cooker

1 is a perspective view of a heating cooker showing a first embodiment of the present invention.

2 is a cross-sectional view of the entire cooker.

3 is an enlarged cross-sectional view of the main part of the cooking heater.

4 is a longitudinal sectional view showing a part placement chamber portion.

5 is a cross sectional view taken along line 5-5 of FIG.

6 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

7 is a longitudinal cross-sectional view of the periphery of the duct.

8 is an enlarged horizontal cross-sectional view of the spray prevention fan arrangement.

9 is an enlarged perspective view of a portion of the duct.

* Explanation of symbols for main parts of the drawings

1: cooker body 2: outer box

3: inner box 4: heating cooker

5: Arrangement Room 6: Magnetron

7: fan 8: blowing wing

9: motor 10: heater

12: Moon 13: Window

15 light emitting element 19 duct

20: cylinder

The present invention relates to a heating cooker having a microwave heating cooking function for heating food disposed in the cooking chamber by microwaves and a heater heating cooking function for heating by an electric heater, and in particular, a window of a door for opening and closing a front opening of the heating cooking chamber. A heating cooker having a spraying prevention means.

An outer box, an inner box disposed in the outer box and having a heating cooking chamber formed therein; a magnetron disposed in a component placement chamber formed between an inner side of the outer box and an outer side of the inner box; and a front surface of the heating cooking chamber. In a conventional heating cooker comprising a door having a glass window arranged to open and close a side opening, a heater installed to heat food disposed in the heating cooking chamber, and a cooling fan arranged to blow toward the magnetron in the component placement chamber. Microwave heating cooking operates the magnetron, and the food is placed in the heating cooking chamber by applying microwaves to heat the food.Heating heating, such as oven cooking and grill cooking, is energized by an electric heater and generates heat to heat the food. It is cooking to heat food.

In the microwave heating cooking, a cooling fan is driven to cool the magnetron that generates heat at a high temperature, and to prevent the magnetron and the electric parts of the component placement chamber from being heated by the hot gas of the hot gas in the cooking chamber.

Moreover, in this kind of cooking heater, it is provided with the spraying prevention means in order to prevent the door glass window from being sprayed by the steam which generate | occur | produced in food during the micro heating cooking operation. This sprinkling preventing means includes a gas passage member for guiding the gas so as to blow a portion of the gas from the cooling fan along the inner surface of the heating cooking chamber of the glass window, and the passage member has a gas for preventing spraying when the heater is cooked. In order to prevent the gas from being discharged to the heating cooking chamber, a shutter for closing the gas passage member is provided. However, even if the shutter is closed while the heater is being heated, the gas pressure in the booth arrangement chamber is increased by the operation of the cooling fan, so that the cooled wind inevitably leaks into the heating cooking chamber due to the pressure difference. It hindered the temperature rise.

It is a first object of the present invention to provide a heating cooker which can prevent a window made of a transparent material of a door disposed in the front opening of a heating cooking chamber from being sprinkled during microwave heating cooking.

A second object of the present invention is to provide a heating cooker which prevents the cooling air from the cooling fan from leaking into the heating cooking chamber during the heating of the heater, thereby preventing the temperature of the heating cooking chamber from being leaked by the leaked cooling wind. have.

The improved heating cooker provided by the present invention is an outer box, a partition wall member disposed in the outer box for forming a heating cooking chamber therein, and a part formed between the inner side of the outer box and the outer side of the partition wall member. A door having a magnetron disposed in an arrangement chamber, a door made of a transparent material arranged to open and close the front side opening of the heating cooking chamber, a heater installed to heat food disposed in the heating cooking chamber, and the In the heating cooker comprising a cooling fan arranged to blow toward the magnetron, the heating cooker is arranged to communicate between the inside of the heating cooking chamber and the outside of the outer box, one end is opened into the heating cooking chamber through the partition wall member, A duct whose other end is open to the outside of the outer box, and is disposed in this duct and driven at the time of microwave cooking And toward the window, a contact with the transparent material, it has a sprinkling becomes prevention fan for blowing to prevent the sprinkling becomes.

According to this heating cooker, since the cooking chamber communicates with the outside of the outer box through the duct, the inside of the cooking chamber is kept in a good blocking state against the cooling wind from the cooling fan, and during the microwave cooking, the anti-spraying fan The outside air is blown through the duct into the transparent window of the door as a gas to prevent sprinkling. When the heater is heated and cooked, the anti-spreading fan is kept at a standstill in the heating cooking chamber so that there is no intrusion of outside air, which impedes temperature rise, and no intrusion of cooling air.

In the first preferred configuration of the present invention, in order that the heat in the heating cooking chamber does not proceed to the spray prevention fan in the duct, the communication position with respect to the heating cooking chamber in one end side is smaller than the arrangement position of the spray prevention fan in the duct. It is located on the top.

In the second preferred configuration of the present invention, in order to bring the pressure in the duct close to the pressure in the component placement chamber, a venting means is provided for communicating the interior of the duct into the component placement chamber, so that the pressure in the duct is slightly higher than that of the heating cooking chamber. In addition, smoke in the cooking chamber is prevented from dissipating out of the outer box through the duct.

In the third preferred configuration of the present invention, the anti-spreading fan is a motor having a rotating shaft disposed outside the duct so that the rotating shaft passes through the lower side wall of the duct upwardly, and an impeller disposed in the duct communicating with the duct of the rotating shaft. Is done.

In a fourth preferred constitution of the present invention, it has a bank that is formed in the heating cooking chamber and protrudes upward into the duct from near the lower edge of the opening connected to one end of the duct.

In these configurations, since the circuit shaft of the motor is directed upward, the flow of the lubricating oil for the rotating shaft is prevented, and the embankment prevents the water droplets attached to the inner surface of the cooking chamber from entering the duct.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 to 5. First, in FIG. 2 and FIG. 3, the cooker main body 1 is comprised by installing the inner box 3 inside the outer box 2, and the inside of the inner box 3 turns into the heating cooking chamber 4. As shown in FIG. The component placement chamber 5 is formed between the inner box 3 and the outer box 2. Therefore, the inner wall of the inner box can be used as a partition wall member that divides the heating cooking chamber 4 and the component placement chamber 5. The magnetron 6 is provided in this component arrangement room 5, and the 1st fan 7 is provided as a cooling fan. This 1st fan 7 is comprised from the discharge blade 8 and the motor 9 which drives this rotation.

In addition, a heater 10 and an auxiliary fan 11 for generating hot air are provided on the rear surface side of the back plate 4a of the heating cooking chamber 4. Moreover, the front opening part of this heating cooking chamber 4 is opened and closed by the door 12, and the door 12 is provided with the window 13 which consists of a punching metal and the glass plate which is a transparent material.

In the inner box 3, the side wall 3a on the side of the component placement chamber 5 is located at a predetermined position, and a plurality of optical sensor through-holes 14 are formed. As shown in FIG. 4 and FIG. 5, the light-emitting element 15 which comprises a part of an optical sensor is provided in the board | substrate 16 so that each optical sensor passage hole 14 may face from the component placement chamber 5 side. In addition, a plurality is provided through the mounting member 17. A light receiving element (not shown) constituting an optical sensor separately together with each light emitting sensor 15 is provided on the side wall 3b opposite to the side wall 3a.

This optical sensor is used in the heating cooking chamber 4 to detect the presence or absence of food which is a heated cooking object. The light apertures 18 for the light receiving elements are formed as shown in FIG.

2, 3 and 4, the component placement chamber 5 is provided with a cylindrical body 20 constituting the duct 19, and this cylindrical body 20 One end is tightly connected around the inner vent 21 formed of a plurality of small holes formed in the side wall 3a of the heating cooking chamber 5, and the other end is the outer vent 22 formed on the side plate of the outer box 2. ), And the duct 19 communicates with the inside of the cooking chamber 5 and the outer box 2, and the parts arrangement chamber 5 has a structure in which air is not separated.

On the lower side wall of this duct 19, the 2nd fan 23 is provided as a spraying prevention fan. The second fan 23 has a centrifugal blade 24 and a motor 26 for rotating the centrifugal blade 24.

The partition plate 25 is comprised so that the inside of the duct 19 may be divided into upper and lower sides, and the claw 25a formed in the lower end part is inserted into the engagement hole (not shown) of the lower side wall of the duct 19, and the upper end part The formed installation operation part 25b is attached to the upper wall of the duct by screwing it. An inlet port 25c is formed in the center of the partition plate 25. The motor 26 is installed outside the lower side wall of the duct 19, and the rotary shaft 26 penetrates the lower side wall to protrude into the duct 19. The centrifugal blade 24 is attached to this protruding end, which is in a position reaching the intake port 25c.

In addition, the partition plate 25 can obtain the necessary wind pressure generating action with a simple configuration, unlike the so-called vortex winding casing.

In addition, the lower side wall of the duct 19 has a plate member having an embankment portion 27 which inclines and inclines from the lower edge portion (lower edge portion of the small hole forming area) of the inner vent 21 into the duct 19. (28) is provided. In FIG. 2, an alcohol sensor 30a and a steam sensor 30b are provided in the exhaust passage 29 formed outside the inner box 3 so as to communicate with the heating cooking chamber 4.

The heating cooker of this embodiment configured as described above has a heating function, and includes a microwave heating cooking function and a heater heating cooking function.

The microwave heating function outputs microwaves by heating the magnetron 6 and heat-cooks food. At this time, the first fan 7 is driven and the second fan 23 is driven.

Then, when the first fan 7 is driven, the electrical components such as the magnetron 6 and the light emitting element 15 in the component placement chamber 5 are cooled by the cooling wind according to the blowing action. . In addition, the outside air is introduced into the cooking chamber 4 through the duct 19 by the driving of the second fan 23 to prevent it from being sprayed on the inner surface of the window 13 of the door 12.

On the other hand, the heater heating function is to drive the hot air generating heater 10 and the auxiliary fan 11, to form a circulating hot air in the heating cooking chamber 4, and to heat food cooking. At this time, the first fan 7 is driven to stop the second fan 23.

And even when this heater is heated, the electrical component in the component placement room 5 is protected from the radiant heat in the inner box side by the cooling goods produced | generated by the drive of the 1st fan 7. However, since the second fan 23 is stopped, the blowing of the outside air into the heating cooking chamber 4 is stopped. In this case, since the air flow, which is hot air, is formed in the heating cooking chamber 4, it does not cause spraying on the inner surface of the window 13 of the door 12 accordingly.

In this heater heating, the cooling fan in the first fan 7 flows into the heating cooking chamber 4 so that the air inside the duct 19 is separated from the component placement chamber 5. It doesn't happen because Therefore, there is no inflow of a cooling fan into the heating cooking chamber 4, and the temperature in this heating cooking chamber 4 does not fall.

In addition, when the heater is heated, the hot air in the heating cooking chamber 4 flows out of the optical sensor through-hole 14 to the component placement chamber 5, so that the internal pressure of the component placement chamber 5 is increased by the first fan 7. It does not occur because it is slightly higher by the driving of). Therefore, the light emitting element 15 of the optical sensor does not come into contact with hot air, and therefore, the light emitting element 15 does not weaken.

Moreover, although the air may flow into the heating cooking chamber 4 through the optical sensor through-hole 14 from the component placement chamber 5 side, the pressure difference between both chambers 4 and 5 is small, and a hole ( Since 14) is a small diameter, the inflow is small and does not lower the temperature of the heating cooking chamber 4.

Moreover, since the motor 26 of the 2nd fan 23 is arrange | positioned in the lower side wall of the duct 19, since the rotating shaft 26a of the motor 26 faces upwards, the lubricating oil in the motor 26 will be front-end | tip of a rotating shaft. Leakage into the duct 19 does not occur. Moreover, since the dike part 27 which inclines ascending inside the duct 19 is arrange | positioned from the lower edge of the inner side vent 21, the dew condensed on the inner wall of the heating cooking chamber 4 generate | occur | produces, or when water to be taken in and out of a heated cooking object. Even if it adheres, the water is prevented from intruding into the duct 19 by the banks 27. As a result, it can be reliably prevented that the electrical equipment in the second fan 23 and the component placement chamber 5 has been wetted with water from the heating cooking chamber 4.

A second embodiment of the present invention will be described with reference to FIGS. 6 to 9, which are denoted by the same reference numerals as in FIGS. 1 to 5. The duct 31 is connected between the inner side vent 21 formed in the inner box 3 and the outer side vent 22 formed in the outer box 2 similarly to the duct 19 of the first embodiment, and In the vicinity of the connection of the duct 31 to the outer vent 22, the side facing the inside of the component placement chamber 5, as shown in Figs. A hole, that is, a gas introduction hole 32 is formed, and a spray preventing fan 33 due to the outer vent 22 side in the duct 31 is disposed, and the fan 33 is a motor 34. And it consists of a propeller type infeller 35.

In the structure of this second embodiment, the prevention fan 33 is driven in the microwave heating function state as in the case of the first embodiment, and is stopped in the heater heating function state.

When the gas in the heating cooking chamber 4 is in the heater heating function state in which the gas is heated by the heater 10, the smoke generated from the food in the heating cooking chamber 4 does not leak out of the outer box 2 through the duct 31. . The reason for this is that a gas of relatively high pressure by the cooling fan 7 during operation is introduced into the duct 31 through the gas introduction hole 32, but as a result, the gas pressure in the duct near the gas introduction hole 32 is reduced. A state slightly higher than that of the heating cooking chamber 4 is provided, and the difference in gas pressure prevents the smoke in the heating cooking chamber 4 from passing through the duct 31 toward the outer vent 22. .

As can be seen from the above description, according to the present invention, the window made of the transparent material of the door disposed in the front opening of the heating cooking chamber can be prevented from being sputtered during the microwave heating cooking, and the electrical equipment is cooled during the heating cooking. Alternatively, it is possible to prevent leakage of lubricant oil of the motor rotating the spraying prevention fan and to prevent water from entering and getting wet.

The present invention is not limited to the above embodiments and can be practiced with various modifications without departing from the gist of the invention.

Claims (6)

A partition wall member disposed in the outer box, the partition wall member for forming a heating cooking chamber therein, a magnetron disposed between the inner side of the outer box and the outer part of the partition wall member; A door having a window made of a transparent material arranged to open and close a front side opening of the heating cooking chamber, a heater installed to heat food disposed in the heating cooking chamber, and a cooling fan arranged to blow toward the magnetron in the component placement chamber. In the heating cooker consisting of: arranged so as to communicate between the inside of the heating cooking chamber and the outside of the outer box, one end is opened into the heating cooking chamber through the partition wall member, the other end is opened to the outside of the outer box. Ducts arranged in the ducts and driven during microwave heating and directed to transparent windows of the doors Heating cooker characterized in that it has a spraying prevention fan for blowing to prevent the spraying. The heating cooker according to claim 1, wherein the communication position with respect to the heating cooking chamber at one end of the duct is higher than the arrangement position of the spray preventing fan in the duct. The heating cooker according to claim 1, having a relatively small venting means for communicating the inside of the duct into the parts placement chamber so as to bring the pressure in the ducts closer to the pressure in the parts placement chamber. 2. An impeller according to claim 1, wherein the anti-spreading fan is disposed outside of the duct, the motor having a rotating shaft passing through the lower side wall of the duct upwardly, and an impeller disposed in the duct and connected to a through end in the duct of the rotating shaft. Heating cooker, characterized in that consisting of. The heating cooker according to claim 1, further comprising a bank formed in the cooking chamber and rising into the duct near a lower edge of the opening connected to one end of the duct. The heating cooker according to claim 4, wherein the cooking cooker is formed in the heating cooking chamber and has a bank that rises into the duct near the lower edge of the opening connected to one end of the duct.