KR20050009631A - Apparatus for pyrolyzing of micro wave oven and method thereof - Google Patents

Abstract

PURPOSE: A pyrolysis device of a cooker and a method thereof are provided to reduce the time for cleaning by making the surface temperature of a cavity reach 450 degrees centigrade through simultaneous use of all heaters and making the surface temperature quickly lowered by a cooling fan. CONSTITUTION: A pyrolysis device of a cooker includes a microcomputer(33) and a cooling fan(38a) making the surface of a cavity quickly cooled for the unlocking of an oven door. If a user selects a pyrolysis cleaning function key through a key operation part(22), the control part executes control to make the surface temperature of the cavity quickly reach 450 degrees centigrade by simultaneously using all of a grille inside heater(27a), a grille outside heater(27b), and a bottom heater(27c) within a range of a predetermined current value and to make the oven door automatically locked for safety if the surface temperature reaches 300 degrees centigrade.

Description

Pyrolysis device of cooking equipment and its method {APPARATUS FOR PYROLYZING OF MICRO WAVE OVEN AND METHOD THEREOF}

The present invention relates to a cooking apparatus, and more particularly, to a pyrolysis apparatus and a method of a cooking apparatus capable of shortening the total pyrolysis time in a pyrolysis function which is a function for improving the cleaning property of the cooking apparatus.

A general electric oven is an electric product capable of cooking various foods by heating food by a heater with a microwave of about 2450 MHz generated by applying high pressure electricity to a magnetron, which is a high frequency oscillation tube.

1 is a perspective view of a general electric oven.

As shown in FIG. 1, the electric oven 10 has a cavity 14, which is largely externally placed on which food can be placed as an internal space for cooking food, and is installed on the front of the cavity 14 and is equipped with a magnetron. The door 12 which can shield the electromagnetic waves by is provided.

In addition, a variety of key selection for cooking of the user is possible in the upper part of the front of the electric oven, and a control panel 13 in which a microcomputer for controlling each component of the electric oven is installed therein, and a heater in the rear of the cavity 14. A chamber (not shown) is installed.

In addition, a shelf 11 is formed at a central portion of the rear wall between the cavity 10 and the heater chamber (not shown), and an upper / lower portion to support a food to be cooked in the cavity.

In addition, two grill heaters are installed at an upper portion of the cavity 10, and a bottom heater is installed at a lower portion thereof.

In addition, an oven lamp (not shown) is provided on the inner surface of the cavity 10 to illuminate the inside of the cavity. The oven lamp is turned on when the door 12 is opened and during cooking. The circuit is controlled to turn off automatically.

2 is a functional block diagram showing the configuration of a general electric oven.

Referring to FIG. 2, an electric oven typically includes a key operation unit 22 for various cooking control key inputs, a sensor unit 21 for detecting humidity or temperature of food, an automatic cooking control program, and household cooking data. The microcomputer 23 stores the electric oven by controlling the entire electric oven according to the key signal of the key manipulation unit 22 and the detection signal of the sensor unit 21, and the micom 23. The display unit 24 for displaying various types required by the magnetron and the magnetron 26, the grill internal heaters, the grill external heaters 27a and 27b, the bottom heater 27c, and the cooling fan 28a under the control of the microcomputer 23. And a load driver 25 for driving various loads.

In particular, the recent multi-functional electric oven, in addition to the magnetron 26 for generating microwaves to heat food in the cavity, the grill internal heater and grill external heaters 27a and 27b that perform the grill function, and the bottom located on the bottom surface A heater 27c is further included, and a cooling fan 28a for cooling the heated magnetron 26, the grill heaters 27a and 27b, and the bottom heater 27c is included.

In particular, the electric oven thus configured has a disadvantage that is typically very troublesome and difficult to clean.

The pyrolysis function is applied to alleviate this inconvenience, but it is common to maintain the temperature in the cavity at about 450 ° C. for at least about 1 hour and 30 minutes.

However, the conventional pyrolysis function of the electric oven has a problem of safety due to a long time use of the heater for at least 1 hour 30 minutes or a cost increase due to high temperature maintenance.

The present invention has been made to solve the above problems, using all the heaters of the cooking appliance at the same time within the 22A range to reach the surface temperature of the cavity to 450 degrees early and using a separate cooling fan to quickly surface temperature It is an object of the present invention to provide a pyrolysis apparatus and a method of cooking apparatus, which can reduce the overall cleaning time by making it fall.

In addition, since it is not the center temperature in the cavity but the surface temperature that is important for pyrolysis, the pyrolysis apparatus and method of the cooking apparatus capable of reducing the overall cleaning time by controlling the center temperature in the cavity to 400 degrees instead of the surface temperature of 450 degrees can be reduced. The purpose is to provide.

1 is a perspective view of a general electric oven.

2 is a functional block diagram showing the configuration of a general electric oven.

3 is a functional block diagram showing the configuration of an electric oven according to an embodiment of the present invention.

Figure 4 is a pyrolysis graph of the electric oven according to the prior art and the embodiment of the present invention.

5 is a pyrolysis graph of an electric oven according to the prior art and another embodiment of the present invention.

<Description of Major Symbols in Drawing>

21: key operation unit 22: sensor unit

23, 33: microcomputer 24: display unit

25: load driving unit 26: magnetron

27a: grill internal heater 27b: grill external heater

27c: bottom heater 28a: cooling fan 1

38a: cooling fan 2

In order to achieve the above object, according to an aspect of the present invention,

A cooking apparatus comprising a key operating portion for inputting various cooking control keys and a control portion for controlling cooking by controlling the whole by a key signal of the key operating portion, wherein the user applies a pyrolytic cleaning function key through the key operating portion. When selected, all heaters in the grill internal heater, grill external heater and bottom heater are used simultaneously within the specified current range to ensure that the cavity surface temperature reaches 450 ° C early and the oven door automatically opens for safety when 300 ° C is reached. A control unit for controlling to lock; Provided is a pyrolysis apparatus of a cooking apparatus including a separate cooling fan to cool the surface early for unlocking by the control unit.

The controller may reduce the thermal decomposition cleaning time by early reaching the center temperature in the cavity to 400 ° C or more.

According to another aspect of the invention,

In the method for cleaning the residue of the cavity using the pyrolysis function of the cooking apparatus,

(a) reaching the cavity surface temperature of 450 [deg.] C. by simultaneously using all heaters in the device within a predetermined range of current values;

(b) in the step (a), the oven door is automatically locked for safety when the cavity surface temperature reaches 300 ℃,

(c) to release the lock in the step (b) provides a pyrolysis method of the cooking appliance comprising the step of cooling the surface temperature using a separate cooling fan.

Here, the current value of the predetermined range is 22A, and in the step (a), it is possible to reach the center temperature in the cavity to 400 ° C or higher rather than reaching the cavity surface temperature of 450 ° C.

Another preferred embodiment is a method of cleaning the residue of a cavity by using the pyrolysis function of the cooking apparatus, wherein the pyrolysis period in which the pyrolysis is achieved by maintaining the center temperature in the cavity of the cooking apparatus at only 400 ° C maintains the entire cleaning time. Provided is a method of pyrolysis of a shortening cooker.

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

3 is a functional block diagram showing the configuration of an electric oven according to an embodiment of the present invention.

Referring to FIG. 3, the present invention provides a key operation unit 22 for inputting various cooking control keys of an electric oven, a sensor unit 21 for detecting humidity or temperature of food, and the like, and an automatic cooking control program. And a microcomputer 33 for controlling cooking of the entire electric oven by storing key cooking data in advance and controlling the whole electric oven by the key signal of the key manipulation unit 22 and the detection signal of the sensor unit 21, and the microcomputer ( 33, a display unit 24 for displaying various kinds of necessary displays under the control of 33, the magnetron 26, the grill internal heaters and the grill external heaters 27a and 27b, the bottom heater 27c, It comprises a cooling fan 28a and a load driver 25 for driving various loads.

However, in the electric oven according to the present invention, when the user selects the cleaning function key using the pyrolysis function through the key manipulation unit 22, the microcomputer 33 is the grill internal heater 27a and the grill exterior within the current value range of 22A. All heaters of the heater 27b and the bottom heater 27c are used at the same time to control the cavity surface temperature to reach 450 degrees early and to control the oven door to automatically lock upon reaching 300 degrees.

In addition, the microcomputer 33 can reduce the overall cleaning time by controlling the center temperature in the cavity to reach 400 degrees rather than the surface temperature of 450 degrees because the surface temperature is important rather than the center temperature in the cavity. .

In addition, the electric oven according to the present invention includes a separate cooling fan 38a in order to quickly lower the surface temperature since it is necessary to cool the surface early for unlocking.

Figure 4 is a pyrolysis graph of the electric oven according to the prior art and the embodiment of the present invention.

Referring to FIG. 4, in the conventional electric oven, the central temperature in the cavity reaches 450 degrees and takes about 1 hour and 30 minutes to cool down for the pyrolysis function.

That is, it takes about 33 minutes for the temperature rise to reach the central temperature in the cavity of the electric oven at 450 degrees. In addition, about 95% of the residues are decomposed and turned into ash only when the temperature at which the residues of the food in the electric oven are decomposed is maintained at 450 degrees, that is, the saturation is normally maintained for 15 minutes or more.

Thereafter, the electric oven, which goes through the saturator, goes through the cool down by the cooling fan for about 27 minutes.

On the other hand, the pyrolysis method of the electric oven according to an embodiment of the present invention is a method of shortening the overall cleaning time by using two heaters on the top of the electric oven and one heater on the bottom.

Table 1 is a table showing a control process when applying a conventional heater and the heater of the current value 22A (22 amps) according to the present invention.

Table 1

Applied heater Watt (W) Ampere (A) Conventional (16A Heater Mode) The present invention (22A heater mode) Grill Heater 1700 7.5 On On off On Grill external heater 1100 5 On off On On Bottom heater 1800 8.0 Off On off On Ampere (A) 12.5 15.5 5 20.5

As shown in Table 1, when the conventional heater is applied, the cleaning operation using the pyrolysis function was performed by controlling the heater on / off within the maximum current value of 16A.

However, the thermal decomposition method of the electric oven according to an embodiment of the present invention, since the current value is 22A during the operation of the electric oven product having a function of the current microwave, the grill internal heater, grill external heater, bottom heater, etc. within the 22A range Using all the heaters at the same time allows the temperature of the cavity surface to reach 450 ° C early.

In addition, when the surface temperature reaches 300 degrees, the oven door is automatically locked for safety, and the surface temperature needs to be cooled down early for unlocking. To reduce the overall cleaning time.

Accordingly, the thermal decomposition method of the electric oven according to an embodiment of the present invention in FIG. 4 takes about 20 minutes to reach the temperature rise until the center temperature in the cavity of the electric oven reaches 450 degrees. do. In addition, the time maintained at 450 degrees, the temperature at which food residues in the oven are decomposed, that is, the saturation is maintained for 15 minutes or more, and a cool down by a separate cooling fan is passed for about 21 minutes. .

Therefore, while maintaining the saturator to be pyrolyzed as in the prior art, the riser is reduced by about 13 minutes, the cooler is reduced by about 6 minutes to reduce the cleaning time as a whole 20 minutes.

5 is a pyrolysis graph of an electric oven according to the prior art and another embodiment of the present invention.

Referring to FIG. 5, in the conventional electric oven, the central temperature in the cavity reaches 450 degrees for the pyrolysis function and it takes about 1 hour and 30 minutes to cool down.

That is, it takes about 33 minutes for the temperature rise to reach the central temperature in the cavity of the electric oven at 450 degrees. In addition, about 95% of the residues are decomposed and turned into ash only when the temperature at which the residues of the food in the electric oven are decomposed is maintained at 450 degrees, that is, the saturation is normally maintained for 15 minutes or more.

Thereafter, the electric oven, which goes through the saturator, goes through the cool down by the cooling fan for about 27 minutes.

On the other hand, in the method of pyrolysis of an electric oven according to another embodiment of the present invention, when the center temperature in the cavity of the electric oven reaches 400 degrees (° C.), the surface temperature in the cavity reaches 450 degrees (° C.) in advance. Saturation or pyrolysis, in which pyrolysis is achieved by reaching only 400 degrees rather than reaching the center temperature of 450 degrees, is a method of shortening the overall cleaning time while maintaining the same.

That is, the test result shows that the food residue in the cavity starts pyrolysis at 450 degrees, which is important according to the surface temperature in the cavity, not the center temperature in the cavity.

Therefore, the surface of the oven to which the residue is attached must be operated for at least 450 degrees for at least 15 minutes so that about 95% of the residue is decomposed and turned into ash.

Also. When the center temperature in the cavity reaches 400 degrees, the oven surface near the heater reaches 450 degrees before 10 to 15 minutes, so that pyrolysis occurs even if the heater is turned off after the center temperature in the cavity reaches 400 degrees.

As shown in FIG. 5, the pyrolysis method of an electric oven according to another embodiment of the present invention is characterized in that the temperature riser (ie, riser) is reached until the center temperature in the cavity of the electric oven reaches 400 degrees (surface temperature in the cavity is 450 degrees). Temperature rise takes about 22 minutes. In addition, the time at which the temperature at which food remains in the oven are decomposed is maintained at 450 degrees, that is, the saturation is maintained for 15 minutes or more, and the cool down by a separate cooling fan is about 24 minutes. Rough

Therefore, while maintaining the saturator to be pyrolyzed as in the prior art, the riser is reduced by about 10 to 15 minutes, the cooler is reduced by about 2 to 3 minutes, the overall cleaning time can be reduced by about 15 minutes.

In addition, the present invention has been described with respect to the pyrolysis apparatus and method of the electric oven, but is not limited to this, it can be applied to a general cooking apparatus such as a microwave oven using a microwave or a heat heater.

As described above, the pyrolysis apparatus and method of the electric oven according to the present invention, by using all the heaters of the electric oven at the same time within 22A range to reach the cavity surface temperature early 450 degrees and using a separate cooling fan This allows the surface temperature to drop quickly, reducing the overall cleaning time.

In addition, it is important for pyrolysis that the surface temperature is not the center temperature in the cavity, so that the overall cleaning time can be reduced by controlling the center temperature in the cavity to 400 degrees rather than the surface temperature of 450 degrees.

Claims (6)

A cooking apparatus comprising a key operating portion for inputting various cooking control keys and a control portion for controlling cooking by controlling the whole by a key signal of the key operating portion, wherein the user applies a pyrolytic cleaning function key through the key operating portion. When selected, all heaters in the grill internal heater, grill external heater and bottom heater are used simultaneously within the specified current range to ensure that the cavity surface temperature reaches 450 ° C early and the oven door automatically opens for safety when 300 ° C is reached. A control unit for controlling to lock; And a separate cooling fan to cool the surface early for unlocking by the control unit. The method of claim 1, The control unit is a pyrolysis apparatus of the cooking apparatus, characterized in that to reach the center temperature in the cavity early to 400 ℃ or more to reduce the pyrolysis cleaning time. In the method for cleaning the residue of the cavity using the pyrolysis function of the cooking apparatus, (a) reaching the cavity surface temperature of 450 [deg.] C. by simultaneously using all heaters in the device within a predetermined range of current values; (b) in the step (a), the oven door is automatically locked for safety when the cavity surface temperature reaches 300 ℃, (C) the pyrolysis method of the cooking apparatus comprising the step of cooling the surface temperature using a separate cooling fan to unlock the lock in the step (b). The method of claim 3, wherein And the current value of the predetermined range is 22 A. The method of claim 3, wherein In the step (a), instead of reaching the cavity surface temperature of 450 ℃, the pyrolysis method of the cooking appliance, characterized in that to reach the center temperature in the cavity to 400 ℃ or more. In the method for cleaning the residue of the cavity using the pyrolysis function of the cooking apparatus, A method of pyrolysis of a cooker, characterized by shortening the overall cleaning time while maintaining the same pyrolysis period in which the pyrolysis takes place by reaching the center temperature in the cavity of the electric oven at only 400 ° C.