KR20160015750A - cooking apparatus and control method of the same - Google Patents

Abstract

The present invention relates to a cooking apparatus and a control method thereof, and more particularly, to a cooking apparatus including a filter capable of efficiently collecting gas and soot generated during pyro-cleaning and a control method thereof.
According to an embodiment of the present invention, there is provided a cooking device comprising: a body having a cooking chamber formed therein; a vent portion for discharging the gas inside the cooking chamber to the outside of the cooking cavity; and at least one of a cooking chamber and a vent portion, Filter, and the filter includes a metal sheet.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooker,

The present invention relates to a cooking apparatus and a control method thereof, and more particularly to a cooking apparatus having a metal foam or a filter and a control method thereof.

A cooking appliance is a household appliance that heats the food inside the cooking chamber using gas or electricity. There are various products such as an oven and a microwave oven, and the oven is divided into a gas oven and an electric oven depending on the type of heat source.

Such a cooking appliance cooks food while heating and operating at a time set by the user. Due to the nature of the cooking, the food is heated, and combustion oxides and oil mist are generated along with steam on the surface, which causes an unpleasant smell during cooking . In addition, the oil mist generated in the range of 100 to 150 ° C remains in the inner wall of the cooking device, which is a major cause of the inner wall pollution and odor during long-term use.

In order to periodically remove the pollution of the inner wall, pyro-cleaning is mainly used to carry out the combustion combustion at a temperature within the range of 400 to 500 ° C. However, due to the characteristic of the combustion by the high temperature heating, a large amount of noxious gas and soot .

DISCLOSURE OF THE INVENTION The present invention is intended to solve the problems described above, and it is an object of the present invention to provide a cooking apparatus including a metal foam provided to collect and disassemble cooking gas.

The present invention also provides a cooking apparatus including a filter for collecting combustion gas or soot and a control method thereof.

In addition, it is intended to provide a cooking appliance having a deodorizing mode for deodorizing the odor generated from the cooking gas.

According to one aspect of the present invention, there is provided a cooking apparatus comprising: a body having a cooking chamber formed therein; a vent portion for discharging the gas inside the cooking chamber to the outside of the cooking chamber; and at least one of a cooking chamber and a vent portion, A filter for collecting the soot, and the filter includes a metal sheet.

Further, the filter may include a metal sheet wound around the central axis of the upper and lower open cylindrical members and the cylindrical member.

The metal sheet may include a plurality of corrugations and a corrugated sheet having the corrugated pattern, and the corrugated sheet may have a structure in which the corrugated sheet is wound in a spiral shape with respect to the central axis of the cylindrical member.

The floor and the valleys of the corrugated sheet may have a height difference of 1 mm or more and 5 mm or less.

Further, the gravel sheet may be characterized in that the gap from the first floor to the second floor of the floor or the first to second bones of the bones is larger than the difference in height between the floor and the bones.

The corrugated sheet may have a structure in which the corrugated sheet is wound so as to have a helix angle of 50 DEG or more and less than 90 DEG with respect to the central axis of the cylindrical member.

Further, the metal sheet may further include a flat sheet joined to the corrugated sheet, and the corrugated sheet and the flat sheet may have a structure in which they are joined to each other and wound in a spiral shape with respect to the central axis of the cylindrical member.

Further, the metal sheet may include a catalyst sheet comprising at least one platinum group metal element selected from the group including platinum (Pt), rubidium (Rd), and rhodium (Rh).

The metal sheet may also include a metal oxide sheet containing at least one metal oxide selected from the group consisting of aluminum oxide (Al2O3), magnesium oxide (MgO) and copper oxide (CuO).

Further, in the cylindrical member, the height of the cylindrical member may be larger than the diameter of the cylindrical member.

Further, the cylindrical member may include at least one member selected from the group including metals and ceramics.

Further, the gas may include at least one selected from the group including a combustion gas and a cooking gas.

Further, the cooking chamber may include a fixing portion provided so that a filter can be detached.

Further, the fixing portion can be provided at a higher position than at least one tray mounting rail mounted in the cooking chamber.

The apparatus may further include a suction hole formed at one side of the cooking chamber so that gas in the cooking chamber flows into the vent portion, and the filter may be fixed around the suction hole.

The filter may also include at least one temperature sensor that senses clogging of the filter.

In addition, it may further include a metal foam for trapping and decomposing gas inside the cooking chamber.

The control unit may further include a heating unit for heating the cooking chamber and a control unit for controlling the heating source so that the temperature of the cooking chamber is gradually raised.

The control unit may control the heating source so that the temperature of the cooking chamber is maintained for a first time preset to a first predetermined temperature and the temperature of the cooking chamber is maintained for a second predetermined time set at a predetermined second temperature higher than the first temperature. Can be controlled.

Next, a method of controlling a cooking appliance according to an aspect includes the steps of: controlling the temperature of the cooking chamber to be maintained at a preset first temperature for a first predetermined time, and controlling the temperature of the cooking chamber to a predetermined second temperature And a second predetermined period of time to be maintained for a second predetermined time.

Further, the first time and the second time may be five minutes or more.

Also, the first temperature may have a range within a range of 250 to 300 占 폚.

Also, the second temperature may have a range within a range of 420 to 450 ° C.

Further, the heating source may further include a final step of operating so that the temperature of the cooking chamber is maintained for a third predetermined time set at a predetermined third temperature higher than the second temperature.

Also, the third time may be 30 minutes or more.

Next, the cooking device according to one aspect is installed around a convection fluid portion including a body having a cooking chamber therein, a convection heater for heating air inside the cooking chamber, and a convection fan for circulating air inside the cooking chamber, and around the convection fluid portion And a metal foam for collecting and decomposing the cooking gas contained in the air inside the cooking chamber.

The metal foams are formed of a metal member containing at least one metal element selected from the group consisting of nickel (Ni), chrome (Cr) and iron (Fe) And a metal catalyst layer comprising at least one platinum group metal element selected from the group consisting of rubidium (Rh) and rhodium (Rh).

In addition, a metal oxide layer containing at least one metal oxide selected from the group consisting of aluminum oxide (Al2O3), magnesium oxide (MgO) and copper oxide (CuO) may be further interposed between the metal member and the metal catalyst layer.

Further, the metal foam can be formed into a porous form having a plurality of bubbles therein.

In addition, the bubbles may have a size ranging from 10 to 3000 micrometers.

Also, the metal foam may have the activity of the catalyst at a high temperature in the range of 100-1000 占 폚.

Also, at least one of the body, the convection heater, or the convection fan includes a support member, and the metal foam may have a mounting structure to be fixed to the support member.

The circumference of the convection fluid portion may include the edge portion of the convection heater.

Also, a convection heater and a convection fan may be installed on the rear plate of the main body, and the circumference of the convection fluid may be between the back plate of the main body and the convection heater and the convection fan.

Further, the periphery of the convection fluid portion may include a back plate of the main body.

In addition, the periphery of the convection fluid section may include a convection fan surface.

The control unit may further include a controller for controlling the convection heater and the convection fan so as to determine the degree of contamination inside the cooking chamber and proceed with the deodorization mode according to the determination.

The controller may further include a first sensing sensor for sensing contaminants contained in the cooking gas, and when the degree of contamination inside the cooking chamber is greater than a predetermined level as a result of detection by the first sensing sensor, Heater and convection fan can be done.

The controller may further include a second sensing sensor for sensing whether the cooking object is accommodated in the cooking chamber. When the control unit determines that the cooking object is accommodated in the cooking chamber as a result of sensing by the second sensing sensor, Convection fans can be controlled.

The apparatus may further include a door locking device, and the door of the cooking appliance may be closed by the door locking device while the deodorization mode is being performed by the control part.

Next, the cooking device according to one aspect includes a convection flow part including a body having a cooking chamber formed therein, a convection heater for heating air inside the cooking chamber, and a convection fan for circulating air inside the cooking chamber, And is formed into a metal foam which collects and decomposes the cooking gas contained in the air.

Next, the cooking apparatus according to one aspect of the present invention includes a main body having a cooking chamber formed therein, a convection heater including a convection heater for heating the air inside the cooking chamber, and a convection fan for circulating air inside the cooking chamber, And is then formed into a metal foam for trapping and decomposing the cooking gas contained in the air of the cooking cavity.

According to the cooking apparatus of the present invention configured as described above, the following effects can be expected.

First, the cooking apparatus of the present invention is capable of decomposing not only a gas but also a liquid-phase oil mist by mounting a metal foam as a gas processing system in a convection fluid portion having a high fluidity in a high state.

In addition, the surface of the metal foam is coated with a high-temperature catalyst so that the gas mist and the liquid phase oil mist can be decomposed in real time even in a high temperature environment.

1 is a perspective view showing an appearance of a cooking apparatus according to an embodiment of the present invention.
Fig. 2 is a configuration diagram showing the configuration of the cooking apparatus shown in Fig. 1. Fig.
FIG. 3 is a view showing a control block diagram of the cooking apparatus shown in FIG. 1. FIG.
Fig. 4 is an enlarged view of the filter of Fig. 2. Fig.
Fig. 5 is an enlarged view of a cross section of the metal member of Fig. 4;
6 is a view showing an example of a filter in which a corrugated sheet has a helical angle of 60 DEG C with respect to a central axis of a cylindrical member.
7 is a view showing an example of a filter including only a corrugated sheet.
8 is a view showing an example of a filter further comprising a catalyst sheet in addition to a corrugated sheet and a flat sheet.
9 is a view showing an example of a filter further comprising a metal oxide sheet in addition to a corrugated sheet and a flat sheet.
10 is a view showing an example of a filter including both a corrugated sheet, a flat sheet, a catalyst sheet and a metal oxide sheet.
11 is a view showing the configuration of a cooking appliance including a filter having a clogging detection structure.
Fig. 12 is an enlarged view of the filter of Fig. 11. Fig.
13 is a control block diagram of the cooking apparatus according to Fig.
FIG. 14 is a control block diagram of a cooking apparatus further including an alarm unit in addition to the temperature sensor.
15 is a view showing an example in which a filter is installed inside the cooking chamber.
16 is a view showing an example in which the filter is installed inside the vent portion and inside the cooking chamber, respectively.
17 is a control flowchart showing a control method of the cooking apparatus according to an embodiment.
18 is a graph showing the concentration of the combustion gas generated during the cleaning process of the conventional cooking apparatus.
19 is a graph showing the concentration of the combustion gas generated in the cleaning process according to an embodiment.
20 is a control flowchart showing a control method of a cooking apparatus in which the combustion temperature is controlled in three steps.
FIG. 21 is a control flowchart showing a control method of a cooking device in which the combustion temperature is controlled in four steps.
22 is a control flowchart showing a process of detecting a driving state of a filter of a cooking appliance including a filter provided with a temperature sensor.
Fig. 23 is a configuration diagram showing a configuration of a cooking device including a metal foam.
24 is an enlarged view of the surface of the metal foam.
25 and 26 are enlarged views of the structure of the metal foam.
FIG. 27 is a view showing a control block diagram of the cooking appliance according to FIG. 23. FIG.
FIG. 28 is a view showing a control process of the cooking apparatus according to FIG. 23. FIG.
Fig. 29 is a view showing an effect of reducing the contamination of the cooking appliance shown in Fig. 23. Fig.
30 is a view showing a configuration of a cooking appliance in which a metal foam is mounted between a heater and a rear plate of a main body.
31 is a view showing a configuration of a cooking appliance in which a metal foam is mounted on a rear plate of a main body.
32 is a view showing a configuration of a cooking device in which a rear plate of a main body is formed of a metal foam.
FIG. 33 is a view showing a configuration of a cooking device in which a metal foam is attached to the surface of a convection fan.
34 is a view showing a configuration of a cooking device in which a convection fan is formed by a metal foam.
Fig. 35 is a configuration diagram showing a configuration of a cooking device including both a filter and a metal foam.

The embodiments described herein and the configurations shown in the drawings are merely exemplary embodiments of the present invention, and various modifications may be made at the time of filing of the present application to replace the embodiments and drawings of the present specification. In this regard, the cooking device of the present specification should be widely understood as a concept including an oven and a microwave oven.

The terms including ordinals such as "first "," second ", and the like can be used to describe various elements, but the elements are not limited by these terms and terms may be used to refer to a component from another component It is used only for the purpose of discrimination.

During cooking of food in a cooking device, cooking gas such as steam, combustion oxides, and particles such as oil mist may be generated. In the present specification, water vapor, combustion oxides, etc. discharged in the form of gas are defined as "cooking gas ".

Particles such as oil mist can be stuck to the inner wall of the cooking chamber of the cooking appliance to contaminate the inner wall of the cooking chamber. Hereinafter, particles such as oil mist adhered to the inner wall of the cooking chamber are defined as "contaminants ".

In addition, various forms of combustion products may be generated during the pollutant scavenging process (e.g. pyrolysis process). In the present specification, a combustion product such as carbon monoxide discharged in a gaseous form is defined as a "combustion gas ", and a combustion product such as carbon particles discharged in particle form is defined as" soot ".

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, a cooking device including a filter will be described. Next, a cooking device including a metal foam will be described. Finally, a cooking device including both a filter and a metal foam will be described.

First, a cooking device including a filter and a control method thereof will be described.

FIG. 1 is a perspective view showing the appearance of a cooking appliance 1 according to an embodiment, and FIG. 2 is a configuration diagram showing the configuration of the cooking appliance 1 shown in FIG.

1 and 2, the cooking apparatus 1 includes an oven 10 provided to be able to cook and heat the food in a sealed state, an oven 10 to be cooked by placing the cooking vessel thereon, A cooktop 60 provided at an upper portion of the oven 10 and a drawer 70 provided at the lower side of the oven 10 to perform a storage function or a simple cooking function.

The oven 10 is installed at the bottom of the cooktop 60 to cook food by heat convection. The oven 10 includes a main body 11 having a cooking cavity 18 formed therein, a heating source for heating air inside the cooking cavity 18 of the main body 11, And a filter 50 installed in at least one of the cooking chamber 18 and the vent portion 40 and collecting the gas generated in the cooking chamber 18. [

A control panel 15 for controlling the operation of the oven 10 may be provided on the main body 11 of the oven 10. The control panel 15 receives an operation command of the oven 10 from a user and can display operation information of the oven 10 to the user and includes an input unit 16 for receiving a user's operation command, And a display unit 17 for displaying operation information. In more detail, the input unit 16 includes a driving mode input unit for receiving an operation command of the oven 10, a cleaning mode input unit for receiving a cleaning execution command of the oven 10, And a filter inspection mode input unit for inspecting the oven 10. The display unit 17 may include an operation information display unit for displaying operation information related to the operation of the oven 10, And a filter state information display unit for displaying a result of the inspection of the state of the filter 50 of the oven 10.

The input unit 16 may employ a pressure switch or a touch pad. The display unit 17 may employ a liquid crystal display (LCD) panel or a light emitting diode (LED) panel.

Although the control panel 15 shown in FIGS. 1 and 2 is provided separately from the input unit 16 and the display unit 17, the embodiment of the control panel 15 is not limited thereto. The control unit 15 includes an input unit 16 and a display unit 17 A touch screen panel (TSP) may be employed.

The main body 11 may have an outer appearance formed by the top plate 12, the bottom plate 13, both side plates (not shown) and the rear plate 14, and a cooking chamber 18 may be formed therein. The front surface of the main body 11 may be provided with a door 20 for opening and closing a front surface of the cooking chamber 18.

When the cooking chamber 18 is opened, the food can be put into and taken out of the cooking chamber 18, and the food can be cooked according to predetermined values when the cooking chamber 18 is closed. Accordingly, the front surface of the door 20 may be provided with a sight window 21 for checking the receipt and payment status of the food and the cooking condition of the food.

A tray 19 may be detachably mounted on the cooking chamber 18 so that food to be cooked can be placed thereon. A tray mounting rail (not shown) is provided on both sides of the cooking chamber 18 to support the tray 19 Can be installed. The tray 19 may be formed as a plurality as shown in FIG. 2, and the tray mounting rails (not shown) may be formed of at least one pair. In particular, the tray mounting rails (not shown) may be configured as a plurality of pairs at various heights so as to adjust various mounting heights of the trays 19.

The heating source is a device for supplying heat to the inside of the cooking chamber 18 so that food is cooked. The heating source may include a heater module 32 for directly heating the food by applying radiant heat, and a convection module 35 for circulating the heated air to allow the food to be cooked.

The heater module 32 may include at least one heater 34 and the convection module 35 may include at least one convection fan 36. For example, a fan cover 33 may be coupled to the outside of the rear plate 14 of the cooking chamber 18, and a heater 34 and a convection fan 36 may be installed on the rear surface of the fan cover 33. The convection fan 36 can be driven by the first fan motor 37 provided at the rear of the fan cover 33. In this case, have.

The vent portion 40 is a space for discharging gas or particles generated inside the cooking chamber 18 to the outside and the fan cover 41 may be coupled to the outside of the upper plate 12 of the cooking chamber 18. An exhaust fan 42 for exhausting the air in the cooking chamber 18 by generating an air flow may be incorporated in the vent portion 40. The exhaust fan 42 is provided at the rear of the exhaust fan 42, Two fan motors 43 may be installed.

At least one suction hole 44 may be formed in the upper plate 12 facing the exhaust fan 42 to allow air in the cooking chamber 18 to be sucked in. 40 can be mixed with the external cold air by the air flow formed by the rotation of the exhaust fan 42 and can be discharged to the outside.

The filter 50 is a device for collecting the combustion gas and soot generated in the cooking chamber 18. In the cooking device 1 according to the embodiment, the filter 50 can be installed in the vent portion 40 have. In more detail, the filter 50 may be installed around the suction hole 44 formed in the upper surface plate 12 of the main body 11. 14 shows an example in which the inlet of the filter 50 is fixed so as to face the direction of the cooking chamber 18, but the installation example of the filter 50 is not limited thereto. The structure and installation position of the filter 50 will be described later in the related section.

The cooktop 60 is provided on the upper side of the oven 10 and includes a case (not shown), a cooking table 61 and a cooktop 60 heating source.

The case (not shown) accommodates various parts and electric components constituting the cooktop 60, including the cooktop 60 heating source.

The cooking utensil 61 may be disposed on an upper portion of a case (not shown) and may be provided in a flat plate shape so that the cooking utensil can be placed thereon. The countertop 61 may be made of tempered glass so that it is not easily broken or scratched.

A cooking tower heating source 62 is installed under the cooking table 61 to heat the cooking vessel placed on the cooking table 61. The cooking tower heating source 62 may include at least one working coil.

The drawer (70) forms a separate cooking space. A separate heating source may be installed inside the drawer 70 to heat the cooked food or to allow simple cooking.

FIG. 3 is a view showing a control block diagram of the cooking apparatus 1 according to an embodiment.

3, the cooking apparatus 1 according to an embodiment may include a control panel 15, a temperature sensor 80, a storage unit 82, a driving unit 84, and a control unit 86.

As described above, the input unit 16 of the control panel 15 receives various commands for cooking from the user, and the display unit 17 displays various cooking information to the user. For example, the input unit 16 may include an operation mode input unit and a cleaning mode input unit, and the display unit 17 may include an operation mode display unit and a cleaning information display unit.

The user can set the cleaning temperature or the cleaning time of the contaminants on the inner wall of the cooking chamber 18 through the cleaning mode input unit and confirm the cleaning temperature or the cleaning time set through the display unit 17. [ The control panel 15 according to the present embodiment is substantially the same as that described with reference to FIGS. 1 and 2, and a duplicate description will be omitted.

The temperature sensor 80 detects the temperature of the inside of the cooking chamber 18 which is provided in the cooking chamber 18 and changes according to on / off of the heater 34. The temperature sensor 80 may be installed in at least one of the top plate 12, bottom plate 13, both side plates (not shown) and the back plate 14 of the main body 11, The temperature inside the cooking chamber 18 can be sensed periodically until the completion of the cleaning mode.

The temperature sensed by the temperature sensor 80 is transmitted to the control unit 86 and the control unit 86 controls the on / off point of the heater 34 based on the temperature data collected from the temperature sensor 80 . The temperature sensing of the temperature sensor 80 and the role of the control unit 86 based on the temperature sensing will be described later.

The temperature sensor 80 may be implemented as a contact temperature sensor or a non-contact temperature sensor. Specifically, the temperature sensor 80 includes a temperature-measuring resistor (RTD) temperature sensor that uses the resistance change of the metal according to the temperature change, a thermistor temperature sensor that uses a change in the semiconductor resistance according to the temperature change, a junction point of two types of metal wires A thermocouple temperature sensor using an electromotive force generated at both ends, an IC temperature sensor using a voltage across the transistor that varies with temperature, or a current voltage characteristic of a PN junction. However, the present invention is not limited to this, and it is also possible to implement other types of sensors other than those described above as long as the temperature inside the cooking chamber 18 can be sensed.

The storage unit 82 may store various data, programs, or applications for driving and controlling the cooking appliance 1. [ For example, the storage unit 82 stores data on the detection period of the temperature sensor 80, the driving temperature and driving time of the heater 34 in the cooking mode, the driving temperature of the heater 34 in the cleaning mode, And can store a control program for controlling the cooking appliance 1, a dedicated application first provided by the manufacturer, or a general purpose application downloaded from the outside.

The storage unit 82 may be a nonvolatile memory device such as a ROM (Read Only Memory), a PROM (Programmable Read Only Memory), an EPROM (Programmable Read Only Memory), or a flash memory, Or an access memory (RAM), or a storage device such as a hard disk or an optical disk. However, the present invention is not limited thereto, and may include changes within a range that can be easily conceived by a person skilled in the art.

The driving unit 84 outputs a driving signal to each component of the cooking appliance 1. The driving unit 84 may include a first fan motor 37 for driving the convection fan 36 and a second fan motor 43 for driving the exhaust fan 42.

The control unit 86 controls the overall operation of the cooking appliance 1 and the signal flow between the internal components of the cooking appliance 1 and processes the data. The control unit 86 may execute an operating system (OS) and various applications stored in the storage unit 82 when the input of the user or predetermined conditions are satisfied.

The control unit 86 can control the heater 34 and the convection fan 36 so that the food stored in the cooking chamber 18 can be cooked when the operation mode of the cooking apparatus 1 is inputted from the user. When the cleaning mode of the cooking appliance 1 is inputted from the user, the heater 34, the convection fan 36 and the like can be controlled so that the cooking chamber 18 is cleaned. In particular, the cleaning mode may be performed according to a manual operation of the user, or may be performed through execution of an application previously stored in the storage unit 82 or the like.

In the cooking chamber 18 of the cooking appliance 1 having the above-described structure, combustion oxides, oil mist, and the like may be generated together with steam in the cooking process due to the characteristics of the heating cooking. Part of the oil mist generated at the normal cooking temperature, (18) may remain as a main cause of contamination of the inner wall of the cooking chamber (18) and odor when used for a long time. Therefore, it is preferable that a process of periodically cleaning the contaminants is performed so that the cooking chamber 18 can be kept clean.

The cooking apparatus 1 according to an embodiment of the present invention is applied to a pyro cleaning method for removing contaminants by applying heat at a high temperature. In the combustion process of pollutants through the pyrolytic cleaning method, a large amount of soot such as carbon monoxide (CO) -containing combustion gas and carbon particles is generated due to the characteristic of combustion of pollutants through high temperature heating, and combustion gas and soot And it causes inconvenience to the user.

Accordingly, it is possible to reduce the amount of the combustion gas and soot discharged into the room by installing the filter 50 in the cooking device 1, and by controlling the temperature and the operation time of the heater 34 in the pyro cleaning process, The amount of the combustion gas and the amount of soot generated can be adjusted stepwise. Hereinafter, the structure of the filter 50 installed in the cooking apparatus 1 and various modified applications will be described, and then a control method of the cooking apparatus for performing cleaning by the pyro cleaning method will be described.

First, the structure of the filter 50 will be described.

Fig. 4 is an enlarged view of the filter 50 of Fig. 2, Fig. 5 is an enlarged sectional view of the metal member of Fig. 4, Fig. 6 is an enlarged view of the center axis 55 of the cylindrical member 51 And the corrugated sheet 53 is wound so as to have a helix angle of 60 ° C.

4 and 5, the filter 50 according to an embodiment includes the upper and lower open cylindrical members 51 and the metal sheet 52 wound around the central axis 55 of the cylindrical member 51 do.

The cylindrical member 51 supports the winding structure of the metal sheet 52 and forms the appearance of the filter 50. The height H of the cylindrical member 51 may be larger than the diameter L of the cylindrical member 51. [ Further, the cylindrical member 51 may include at least one component selected from the group including metals and ceramics.

The metal sheet 52 may include a flat sheet 54 and a corrugated sheet 53, each of which is made of a metal material. More specifically, it may include a corrugated sheet 53 which is joined to the flat sheet 54 and the flat sheet 54 and has a plurality of corrugated and corrugated patterns.

The floor and the valley formed on the golf course sheet 53 may have a repeated pattern in which the floor and the valley having the same amplitude are periodically formed. For example, referring to FIG. 5, the corrugated sheet 53 according to an embodiment includes a plurality of corrugated sheets 53 in the order of a first floor P1, a first corrugation V1, a second floor P2 and a second corrugation V2. And a pattern in which the bones are repeatedly formed.

The height difference A between the floor and the valley of the valley sheet 53 can be formed within a range of 1 mm or more and 5 mm or less and the interval lambda 1 from the first floor P1 to the second floor P2 The interval? 2 from the first valley V1 to the second valley V2 can be formed larger than the height difference A between the floor and the valley.

The thus formed metal sheet 52 has a structure in which the metal sheet 52 is wound around the central axis 55 of the cylindrical member 51. At this time, the corrugated sheet 53 may have a structure in which the corrugated sheet 53 is wound in a spiral shape with respect to the central axis 55 of the cylindrical member 51. More specifically, the corrugated sheet 53 may have a structure in which the corrugated sheet 53 is wound so as to have a helix angle of 50 DEG or more and less than 90 DEG with respect to the central axis 55 of the cylindrical member 51. [

The helix angle is defined as an angle formed by the floor pattern or the valley pattern of the valley 53 having the structure in which the central axis 55 of the cylindrical member 51 and the central axis 55 of the cylindrical member 51 are wound around . For example, as shown in FIG. 6, the angle formed by the central axis 55 of the cylindrical member 51 and the valley pattern can be defined as a helix angle S.

Referring to FIG. 6, the corrugated sheet 53 may have a coiled structure with a helical angle S of 60 degrees in the clockwise direction with respect to the direction of the central axis 55 of the cylindrical member 51. 6 is a view showing an example of a structure in which the ribbed sheet 53 is wound so as to have a helix angle S with respect to the central axis 55 of the cylindrical member 51, The structure is not limited to the example of Fig.

The metal sheet 52 may be modified in various forms in addition to the configurations shown in Figs. 4 to 6, and various modifications of the filter 50 will be described below.

7 is a view showing an example of a filter 50a including only a corrugated sheet 53a and FIG. 8 is a view showing an example of a filter 50b including a corrugated sheet 53b and a flat sheet 54b in addition to a catalyst sheet 56b 9 is a view showing an example of a filter 50c further including a metal oxide sheet 57c in addition to a corrugated sheet 53c and a flat sheet 54c and FIG. And shows an example of the filter 50d including the sheet 53d, the flat sheet 54d, the catalyst sheet 56d, and the metal oxide sheet 57d.

Referring to FIG. 7, the metal sheet 52a may include only a corrugated sheet 53a having a plurality of floor and corrugated patterns. The size and shape of the bone sheet 53a according to the present embodiment are substantially the same as those described with reference to Figs. 4 to 6. Hereinafter, duplicate description will be omitted.

When the metal sheet 52a includes only the corrugated sheet 53a, it is preferable that the rolled structure of the filter 50a is formed such that the valleys and the floor are in contact with each other. When the bones and the valleys are formed to be in contact with each other, a space for collecting gas between the metal sheets 52a is formed narrowly.

8, the metal sheet 52b may further include a catalyst sheet 56b in addition to the flat sheet 54b and the corrugated sheet 53b. The flat sheet 54b and the rib sheet 53b according to the present embodiment are substantially the same as those described with reference to Figs. 4 to 6, respectively.

The catalyst sheet 56b may be joined to one surface of the flat sheet 54b or one surface of the goal sheet 53b. That is, the metal sheet 52b has a structure formed in the order of the catalyst sheet 56b / the flat sheet 54b / the corrugated sheet 53b, or the flat sheet 54b / the catalyst sheet 56b / 8) and a structure formed in the order of the flat sheet 54b / the core sheet 53b / the catalyst sheet 56b in this order.

The catalyst sheet 56b is preferably formed so as to have a large surface area by being bonded to the bar stock 53b provided so that the combustion gas can be collected better on the metal sheet 52b, (Rd), and rhodium (Rh).

9, the metal sheet 52c may further include a metal oxide sheet 57c in addition to the flat sheet 54c and the ribbed sheet 53c. The flat sheet 54c and the corrugated sheet 53c according to the present embodiment are substantially the same as those described with reference to Figs. 4 to 6, respectively.

The metal oxide sheet 57c may be bonded to one surface of the flat sheet 54c or one surface of the rib sheet 53c. That is, the metal sheet 52c has a structure in which the metal oxide sheet 57c / the flat sheet 54c / the corrugated sheet 53c are formed in this order, or the flat sheet 54c / the metal oxide sheet 57c / And a structure formed in the order of the flat sheet 54c, the corrugated sheet 53c, and the metal oxide sheet 57c, as shown in Fig.

It is more preferable that the metal oxide sheet 57c is formed so as to have a large surface area by being bonded to the bar stock sheet 53c which is provided so that the combustion gas can be better captured in the metal sheet 52c. In addition, the metal oxide sheet 57c may include at least one metal oxide selected from the group consisting of aluminum oxide (Al2O3), magnesium oxide (MgO), and copper oxide (CuO).

Referring to Fig. 10, the metal sheet 52d may include both the catalyst sheet 56d and the metal oxide sheet 57d in addition to the flat sheet 54d and the ribbed sheet 53d. The flat sheet 54d, the ribbed sheet 53d, the catalyst sheet 56d and the metal oxide sheet 57d according to the present embodiment are substantially the same as those described with reference to Figs. 16 to 21, respectively, .

Various modifications (50a, 50b, 50c, 50d) of the filter 50 included in the cooking apparatus 1 and the cooking apparatus 1 according to the embodiment have been described above. Next, a cooking apparatus 1 according to another embodiment including a filter having a clogging detection structure will be described.

FIG. 11 is a diagram showing the configuration of the cooking appliance 1 including the filter 50e having the clogging detection structure, and FIG. 12 is an enlarged view of the filter 50e of FIG. 11, the configuration of the cooking appliance 1 except for the filter 50e is the same as that shown in Figs. 1 and 2, and a description overlapping with Figs. 1 and 2 will be omitted.

Referring to Fig. 12, the cooking appliance 1 includes a filter 50e having a clogging detection structure. If the filter 50 is repeatedly used, particulate matter such as soot may be adsorbed in the filter 50 to reduce the performance of the filter 50. If it is determined that the filter 50 is clogged after a certain period of time has elapsed The filter 50 needs to be cleaned or replaced. Accordingly, the cooking apparatus 1 according to the present embodiment employs a filter 50e having a clogging detection structure so that the user can check the replacement timing of the filter.

As an example of the clogging detection structure, a temperature sensor 81 may be employed. The temperature sensor 81 may be installed around the discharge portion 58 of the filter 50 to collect the temperature of the gas that has passed through the filter 50 and the temperature data of the collected discharge portion 58 may be supplied to the controller 86 So that it can be provided for detection of whether or not the filter 50 is clogged.

For example, if the filter 50 operates normally without clogging, there is no temperature difference between the inlet 59 and the outlet 58 of the filter 50 or the temperature of the inlet 59 is greater than the temperature of the outlet 58 It is slightly higher than the temperature. However, when the filter 50 is clogged with a certain amount of particles, the temperature difference between the air discharged through the discharge portion 58 and the combustion gas heated in the cooking chamber 18 increases.

That is, if the temperature difference between the both ends of the filter 50 is equal to or less than the preset reference value, it is determined that the filter 50 is normally operated. If the temperature difference between the both ends of the filter 50 is equal to or greater than the predetermined reference value, Is applied.

The cooking appliance 1 may further include an alarm unit 90. When it is determined that the filter 50 is blocked, an alarm for notifying the user of the replacement time or the cleaning time of the filter 50 through the alarm unit 90 You can give.

13 is a control block diagram of the cooking apparatus 1 including the filter 50 provided with the temperature sensor 81 in the discharge portion 58. Fig. 1 is a control block diagram of a cooking apparatus 1 according to an embodiment.

Referring to FIG. 13, the cooking apparatus 1 according to an exemplary embodiment may further include a temperature sensor 81 provided in a discharge portion 58 of the filter 50, in addition to the configuration of FIG. A temperature sensor provided inside the cooking chamber 18 is defined as a first temperature sensor 80 for distinguishing the temperature sensor 80 from the temperature sensor 80 shown in FIG. 3, and a temperature sensor provided in the discharge portion 58 of the filter 50 And is defined as a second temperature sensor 81.

A first temperature sensor 80, a storage section 82, a driving section 84, and a control section 86. The input section 16, the display section 17, the heater 34, the convection fan 36, the exhaust fan 42, Are substantially the same as those described with reference to FIG. 3, and redundant explanations are omitted.

The second temperature sensor 81 collects the temperature of the air passing through the filter 50 and outputs it to the control unit 86. The second temperature sensor 81 may be implemented by a contact type temperature sensor or a non-contact type temperature sensor in the same manner as the first temperature sensor 80.

If it is determined that the temperature difference detected by the first temperature sensor 80 and the second temperature sensor 81 is equal to or lower than a predetermined temperature difference, a message indicating that the filter 50 is normally operating may be output to the filter status information display section , If the temperature difference detected by the first temperature sensor 80 and the second temperature sensor 81 is determined to be equal to or greater than a predetermined temperature difference, a message indicating clogging or failure of the filter 50 may be output to the filter state information display section .

Referring to FIG. 14, the cooking apparatus 1 according to an embodiment may further include an alarm unit 90. A first temperature sensor 80, a second temperature sensor 81, a storage unit 82, a driving unit 72, a display unit 17, a heater 34, a convection fan 36, an exhaust fan 42, The control unit 84 and the control unit 86 are substantially the same as those described with reference to FIG.

The controller 86 determines that the temperature difference between the first temperature sensor 80 and the second temperature sensor 81 is equal to or greater than a predetermined temperature difference and the filter 50 is blocked, Lt; / RTI > For example, an alarm message indicating the replacement or cleaning timing of the filter 50 may be output to the display unit 17 or output in the form of a voice.

As described above, the cooking apparatus 1 including the filter 50 provided with the temperature sensor as the clogging detection structure has been described.

Next, various embodiments related to the installation position of the filter 50 in the cooking apparatus 1 will be described.

The filter 50 may be installed on a path through which the combustion gas inside the cooking chamber 18 is discharged to the outside. More specifically, it can be installed inside the cooking chamber 18 or inside the vent portion 40. 2 and 11 illustrate the case where the filter 50 is installed inside the vent portion 40. When the filter 50 is installed inside the cooking chamber 18, the inside of the cooking chamber 18 and the vent portion 40, respectively.

15 is a view showing an example in which the filter 50 is installed inside the cooking chamber 18 and Fig. 16 is a view showing an example in which the filter 50 is installed inside the vent portion 40 and inside the cooking chamber 18, respectively to be.

Referring to FIG. 15, the filter 50 may be installed inside the cooking chamber 18. The filter 50 is fixed to the inside of the cooking chamber 18 by a fixing portion (not shown) provided in the cooking chamber 18, As shown in FIG. The fixing part (not shown) may have a "C" shape so that the filter 50 can be attached and detached, and a plurality of fixing parts (not shown) may be installed so that the filter 50 can be stably fixed.

The filter 50 can be installed at a higher position than the tray mounting rails (not shown) provided in the cooking chamber 18. [ This is to allow the combustion gas to be discharged more easily. However, the installation position of the filter 50 is not limited thereto.

The filter 50 can be installed such that the inlet 59 and the outlet 58 are disposed in parallel with the bottom plate 13 or the top plate 12 respectively and the purified air is connected to the cooking chamber 18 And can be discharged through the discharge portion 58 of the filter 50 connected to the separate flow path. The filter 50 may be installed such that the inlet 59 and the outlet 58 are disposed in parallel with both side plates (not shown), and the rear plate 14 and the closed door 20, But may be arranged so as to be arranged in parallel.

16, the filter 50 may be installed inside the cooking chamber 18 and inside the vent portion 40, respectively. In the case where the filter 50 is provided inside the cooking chamber 18, the same description will be omitted.

The vent portion 40 has a structure connected to the cooking chamber 18 through a suction hole 44 formed in the upper plate 12, as described above. The cooking appliance 1 can fix the filter 50 so that the inflow portion 59 of the filter 50 faces the inside of the cooking chamber 18 by a fixing portion (not shown) provided at the upper end of the suction hole 44 .

The upper panel 12 may be provided with a door opening / closing structure so that the filter 50 can be attached to / detached from the inside of the cooking chamber 18. The user can conveniently perform the replacement operation of the filter 50 from the inside of the cooking chamber 18. [ And so on.

As described above, the installation position of the filter 50 according to one embodiment has been described.

Next, the effect of removing the soot particles of the filter 50 according to one embodiment will be described.

In order to test the effect of removing the soot particles of the filter 50, aerosol particles having various sizes were respectively passed through the ceramic filter and the filter 50 of Fig. Hereinafter, for convenience of explanation, the ceramic filter is defined as the first filter F1, and the filter 50 of Fig. 4 is defined as the second filter F2.

Particle size
(μm) 4 5 6 7 8 9 10 The first filter (F1) 2.6 x 10 ^ 7 1.9x10 ^ 7 1.4x10 ^ 7 1.8 x 10 ^ 6 1.8x10 ^ 5 4.4 × 10 ^ 4 5.5x10 ^ 3 The second filter (F2) 2.4x10 ^ 7 1.0x10 ^ 7 6.0x10 ^ 5 2.7 × 10 ^ 5 3.2x10 ^ 3 0 0 Removal rate
(%) 8.1 46 96 99 98 100 100

[Table 1] shows the results of the reduction effect of the particles of the filter 50 by the sizes of the aerosol particles.

As shown in Table 1, it was confirmed that the second filter (F2) showed a particle removal rate of 8.1% higher than that of the first filter (F1) for particles having a size of 4 μm, The particle removal efficiency was improved by 46% compared to the first filter F1 and the particle removal efficiency was improved by 96 to 100% compared to the first filter F1 for particles having a size of 6 to 10 μm.

As a result of the experiment, it was confirmed that the second filter (F2) exhibits a high particle removal rate with respect to the aerosol particles having a relatively large size. In comparison with the soot removal rate having carbon as the main component, the combustion gas It can be seen that the soot particles having a size of about 6 μm or more can be effectively removed by the filter 50 according to the present embodiment.

Thus, the cooking appliance 1 including the filter 50 has been described. As described above, the soot particles having a relatively large size, which are generated during pyro cleaning, can be effectively removed by the filter 50.

However, in the combustion process, as well as the large-sized soot particles, the combustion gas such as carbon monoxide is also discharged, which may cause inconvenience to the user. Hereinafter, in order to efficiently control the emission amount of the combustion gas, Will be described.

FIG. 17 is a control flowchart showing a control method of the cooking apparatus 1 according to an embodiment. FIG. 18 is a graph showing the concentration of the combustion gas generated in the cleaning process of the cooking apparatus 1 according to the related art And FIG. 19 is a graph showing the concentration of the combustion gas generated in the cleaning process according to one embodiment. 18 and 19 illustrate the concentration of the combustion gas generated in the cleaning process by taking carbon monoxide, which is a combustion gas mainly generated in the pyrolysis process, as an example for convenience of explanation. However, the concentration of the combustion gas containing carbon monoxide changes carbon particles And can be proportional to the amount of the soot particles contained.

Referring to FIG. 17, an operation signal for selecting a cleaning mode is input to a cleaning mode input unit (110).

When the operation signal for selecting the cleaning mode is input, the heating source is operated so that the temperature of the cooking chamber 18 is raised to the first predetermined temperature (112). The contaminants adsorbed on the inner wall of the cooking chamber 18 can be burned in a state where the heating source is operated and the temperature of the cooking chamber 18 is maintained at the first temperature.

The first temperature may be a temperature at which the combustion of the pollutant proceeds first, a temperature of about 300 ° C or less may be set to the first temperature, more preferably a temperature within the range of about 250 to 300 ° C may be set to the first temperature Can be set.

When the heating source is operated and the contaminant adsorbed on the inner wall of the cooking chamber 18 starts to be decomposed, the temperature sensor 80 detects the temperature inside the cooking chamber 18 (114).

When it is determined that the temperature inside the cooking cavity 18 has not reached the first temperature as a result of the detection of the temperature sensor 80, the heating source is continuously operated so that the temperature of the cooking chamber 18 reaches the first temperature (112, 116).

If it is determined that the temperature inside the cooking chamber 18 has reached the first temperature as a result of the detection of the temperature sensor 80, the process of decomposing the contaminants in the cooking chamber 18 while maintaining the first temperature for the first time .

The first time is preferably set to 5 minutes or more because the decomposition rate of the pollutant can be increased as the first time is longer, but the first time can be appropriately adjusted considering the efficiency of the cleaning process (116, 118 ).

If it is determined that the first time has not elapsed, the contaminant in the cooking chamber 18 is continuously burned to the first temperature. If it is determined that the first time has elapsed, the temperature of the cooking chamber 18 is raised to the predetermined second temperature So that the heating source is operated (118, 120).

The second temperature may be a temperature at which the combustion of the pollutant proceeds secondarily, and a temperature higher than the first temperature. It may be set within a range of about 300 to 450 ° C, and is preferably set within a range of 430 to 450 ° C.

When the temperature of the cooking chamber 18 is raised to the second temperature, contaminants on the inner wall of the cooking chamber 18 that have not yet been burned at the first temperature can be burned in stages.

When the contaminant adsorbed on the inner wall of the cooking chamber 18 starts to be secondarily decomposed, the temperature sensor 80 detects the temperature inside the cooking chamber 18 (122).

If it is determined that the temperature inside the cooking chamber 18 has reached the second temperature as a result of the detection by the temperature sensor 80, the process of decomposing the contaminant in the cooking chamber 18 while maintaining the second temperature for the second time . The second time may be set to 5 minutes or more, but the second time may be set to 30 minutes or more since the decomposition rate of the pollutant increases as the second time is longer. (124, 126).

If it is determined that the second time has elapsed while the temperature of the cooking chamber 18 is maintained at the second temperature, the heating source is stopped and the cleaning process of the cooking appliance 1 is terminated.

18 shows the time (min), the left y-axis shows the temperature (占 폚), the right y-axis shows the concentration of carbon monoxide (ppm), the graph 1 (G1) shows the temperature inside the cooking chamber 18, Graph 2 (G2) shows the concentration of carbon monoxide. 19 shows the time (min), the left y-axis shows the temperature (占 폚), the right y-axis shows the concentration of carbon monoxide (ppm), the graph 3 (G3) shows the temperature inside the cooking chamber 18, Graph 4 (G4) shows the concentration of carbon monoxide.

Referring to FIG. 18, in the cleaning process of the cooking apparatus according to the related art, the temperature control for the combustion of the contaminants in the cooking chamber 18 is performed in one step, and the combustion gases such as carbon monoxide Resulting in inconvenience to the user. However, in the cleaning process according to the present embodiment, as shown in FIG. 19, the temperature is stepwise adjusted so that the amount of carbon monoxide discharged during the cleaning process is stepwise adjusted to ensure the comfort of the room.

The cleaning process of the cooking appliance 1, in which the combustion temperature is controlled in two steps, has been described above. 17 and 19, the cleaning process of the cooking device 1 in which the combustion temperature is controlled in two steps has been described as an example. However, the cleaning process of the cooking device 1 is not limited thereto. That is, the cleaning process of the cooking appliance 1 may be controlled in three or four stages.

20 is a control flowchart showing the control method of the cooking apparatus 1 in which the combustion temperature is controlled in three steps, and FIG. 21 shows a control method of the cooking apparatus 1 in which the combustion temperature is controlled in four steps FIG.

Referring to FIG. 20, when the combustion temperature is adjusted over three steps, the control process of the cooking appliance 1 is performed in the same manner as the control process shown in FIGS. 17 and 19 except that the temperature of the cooking chamber 18 is higher than the second temperature And a final step of operating to maintain the preset third temperature for a predetermined third time.

More specifically, steps 110 to 126 may be substantially the same as those of FIG. However, the first temperature may be set within the range of 250 to 300 占 폚, and one hour may be set to 5 minutes or more. Also, the second temperature may be set within the range of 300 to 430 占 폚, and the second time may be set to 5 minutes or more.

If it is determined that the second time has elapsed, the heating source is operated so that the temperature of the cooking chamber 18 is raised to the third predetermined temperature. The third temperature may be a temperature at which the combustion of the pollutant proceeds tertiary, a temperature higher than the second temperature, and may be set within a range of about 430 to 450 ° C (128).

When the temperature of the cooking chamber 18 is raised to the third temperature, contaminants on the inner wall of the cooking chamber 18 that have not yet been burned at the first temperature and the second temperature can be burned step by step.

When the contaminants adsorbed on the inner wall of the cooking chamber 18 begin to be decomposed thirdarily, the temperature sensor 80 detects the temperature inside the cooking chamber 18 (130).

If it is determined that the temperature inside the cooking chamber 18 has reached the third temperature as a result of the detection of the temperature sensor 80, . The third time may be set to 5 minutes or more, but the third time may be set to 30 minutes or more since the decomposition rate of the pollutant increases as the third time is longer.

If it is determined that the third time has elapsed while the temperature of the cooking chamber 18 is maintained at the third temperature, the heating source is stopped and the cleaning process of the cooking appliance 1 is terminated.

Referring to FIG. 21, when the combustion temperature is controlled through four steps, the control process of the cooking appliance 1 is performed by controlling the temperature of the cooking chamber 18 to a fourth temperature higher than the third temperature And a final step of operating so as to be maintained for a preset fourth time period.

More specifically, steps 110 to 134 may be substantially the same as those of FIG. However, the first temperature may be set within the range of 250 to 300 占 폚, and one hour may be set to 5 minutes or more. Also, the second temperature may be set within the range of 300 to 350 占 폚, and the second time may be set to 5 minutes or more. Also, the third temperature may be set within the range of 350 to 420 DEG C, and the third time may be set to 5 minutes or more.

If it is determined that the third time has elapsed, the heating source is operated so that the temperature of the cooking chamber 18 is raised to the fourth predetermined temperature. The fourth temperature may be a temperature at which the combustion of the pollutant proceeds quadratically and a temperature higher than the third temperature, and may be set within a range of about 430 to 450 ° C (136).

When the temperature of the cooking chamber 18 is raised to the fourth temperature, contaminants on the inner wall of the cooking chamber 18 which have not yet been burned at the first temperature to the third temperature can be burned in stages.

When the contaminants adsorbed on the inner wall of the cooking chamber 18 begin to be quadratically decomposed, the temperature sensor 80 detects the temperature inside the cooking chamber 18 (138).

If it is determined that the temperature inside the cooking chamber 18 has reached the fourth temperature as a result of the detection of the temperature sensor 80, . The fourth time may be set to 5 minutes or more, but the fourth time may be set to 30 minutes or more since the decomposition rate of the pollutant increases as the fourth time is longer (140, 142).

If it is determined that the fourth time has elapsed while the temperature of the cooking chamber 18 is maintained at the fourth temperature, the heating source is stopped and the cleaning process of the cooking appliance 1 is terminated.

Next, a control process of the cooking appliance 1 including the filter 50e provided with the temperature sensor 81 will be described. 22 is a control flowchart showing the process of detecting the operating state of the filter 50e of the cooking appliance 1 including the filter 50e provided with the temperature sensor 81. [

Referring to FIG. 22, an operation signal for selecting a filter inspection mode is input to a filter inspection mode input unit (144). 22 shows an example in which a filter check mode is performed when a command for performing a filter check mode is input from a user. However, the determination of whether or not the filter 50e is clogged is not limited to this, It can be automatically performed.

When the filter state detection mode is performed, the first temperature sensor 80 and the second temperature sensor 81 detect the temperature inside the cooking chamber 18 and the temperature of the filter discharge portion 58, respectively (146).

If it is determined that the temperature difference between the first temperature sensor 80 and the second temperature sensor 81 is equal to or lower than the preset fifth temperature, it is determined that the filter 50 is operating normally and the detection mode is ended (148).

If it is determined that the temperature difference between the first temperature sensor 80 and the second temperature sensor 81 is larger than the preset fifth temperature, it is determined that the filter 50 is not operating normally and an alarm is output to the user. (150).

Thus, the cooking apparatus 1 including the filter 50 and the control method thereof have been described. Next, the cooking apparatus 1 including the metal foam (MF) and the control method thereof will be described.

Fig. 23 is a configuration diagram showing the configuration of the cooking apparatus 1 including the metal foam MF.

As shown in FIG. 23, the cooking apparatus 1 includes an oven 10, which is provided so as to be heated and cooked in a state in which foods are hermetically sealed, and an oven 10 on the upper portion of the oven 10, And a drawer 70 provided under the oven 10 to perform a storage function or a simple cooking function. The cooktop 60 and the drawer 70 are substantially the same as the constitution of FIG. 1, and a duplicate description will be omitted.

The oven 10 is installed at the bottom of the cooktop 60 to cook food by heat convection.

The oven 10 includes a main body 11 having a cooking chamber 18 formed therein, a heating source for heating air inside the cooking chamber 18 of the main body 11, And a metal foam MF for collecting and disassembling the metal foam MF.

A control panel 15 for controlling the operation of the oven 10 may be provided on the main body 11 of the oven 10. The control panel 15 receives an operation command of the oven 10 from a user and can display operation information of the oven 10 to the user. The control panel 15 includes an input unit 16 for receiving a user's operation command, And a display unit 17 for displaying operation information. In more detail, the input unit 16 may include an operation mode input unit for receiving an operation command of the oven 10 and a deodorization mode input unit for receiving a user command related to a deodorization operation in the oven 10, The display unit 17 may include an operation information display unit for displaying operation information related to operation of the oven 10 and a deodorization information display unit for displaying operation information related to a deodorization operation in the oven 10. [ Hereinafter, for the sake of convenience of description, the description of the input section 16 and the display section 17 of the control panel 15 will be omitted.

The main body 11 of the oven 10 is formed with an outer tube by a top plate 12, a bottom plate 13, two side plates (not shown) and a rear plate 14 and a cooking chamber 18 is formed therein . The front surface of the main body 11 may be provided with a door 20 for opening and closing the front of the cooking chamber 18.

The fan cover 41 may be coupled to the outer side of the top plate 12 and the fan cover 41 may be provided with an exhaust fan 42 for generating air flow to discharge the air in the cooking chamber 18. [ A second fan motor 43 for driving the exhaust fan 42 may be installed behind the exhaust fan 42.

A plurality of suction holes 44 are formed in the upper plate 12 facing the exhaust fan 42 so that the air in the cooking chamber 18 can be sucked in. It can be mixed with air and discharged to the outside.

A plurality of suction holes 22 are formed in the vicinity of the center of the rear plate 14 so as to suck air in the cooking chamber 18 and a plurality of suction holes 22 are formed at the edge of the rear plate 14 to supply heat into the cooking chamber 18. [ The discharge hole 23 is formed.

A convection flow including a heater 34 and a convection fan 36 is installed in a space provided between the fan cover 33 and the rear plate 14, An additional portion may be formed. In addition, a first fan motor 37 for driving the convection fan 36 may be installed behind the fan cover 33.

At least one metal foam (MF) may be installed around the convection flow part. More specifically, a heater 34 may be installed on the outer circumference of the convection fan 36 provided on the rear surface of the fan cover 33, and a metal foam MF of a circumferential shape may be installed on the surface of the heater 34 . A detailed description of the metal foam (MF) will be described later in the related section.

The heater 34 is sucked through the suction hole 22 to heat the air discharged into the cooking chamber 18 through the discharge hole 23. More specifically, the heater 34 may be installed on the flow path of the air sucked through the suction hole 22 and discharged through the discharge hole 23 to heat air circulating through the convection flow part.

Although not shown in FIG. 23, the cooking apparatus 1 according to the embodiment may further include a heating source for cooking the object to be cooked, in addition to the heater 34 shown in FIG. An auxiliary heater for heating a cooking object accommodated in the cooking chamber 18 may be additionally provided on the upper plate 12 or the bottom plate 13 of the cooking chamber 18. [

Hereinafter, the metal foam (MF) will be described in more detail.

The metal foam (MF) collects and decomposes the cooking gas contained in the air inside the cooking chamber (18). Fig. 24 is an enlarged view of the surface of the metal foam MF, and Figs. 25 and 26 are enlarged views of an example of a metal foam (MF) structure.

Referring to FIG. 24, the metal foam MF is molded into a porous form having a plurality of bubbles therein. Since the metal foam (MF) has a porous form, it can have a large surface area, and therefore it is possible to widen the contact area with contaminants such as gas and oil mist generated during cooking. In addition, the bubbles can have various sizes within the range of 10-3000 micrometers.

Further, the metal foam (MF) is heat resistant so as not to be corroded by the heat output from the heater (34), and more specifically, can have the activity of the catalyst at a high temperature in the range of 100-1000 占 폚.

25, the metal foam MF includes a metal member S containing at least one metal element selected from the group consisting of nickel (Ni), chromium (Cr), and iron (Fe) And a metal catalyst layer M1 formed on the surface of the metal member S. The metal catalyst layer M1 may include at least one platinum group metal element selected from the group consisting of ruthenium (Ru), rhodium (Rh), and rhodium (Rh)

The metal member S forms the structure of the metal foam MF. That is, the porous structure of the metal foam MF can be formed by the metal member S. The metal foam MF may further include a mounting structure for mounting around the main body 11 of the cooking appliance 1, the heater 34, or the convection fan 36, The main body 11, the heater 34, or the convection fan 36 may be provided with a supporting member for mounting the mounting structure.

The platinum group metal element is applied to the surface of the metal member (S) and can function as a catalyst under high temperature conditions. More specifically, contaminants such as gas and oil mist trapped in the bubbles of the metal foam (MF) can be more easily decomposed even in a high temperature environment of 100-1000 ° C.

The platinum group metal element serving as the catalyst may be formed on the surface of the metal member S by at least one of dipping method, plating method, sputtering method and atomization method.

Referring to FIG. 26, the metal foam MF includes at least one member selected from the group consisting of aluminum oxide (Al 2 O 3), magnesium oxide (MgO) and copper oxide (CuO) between the metal member S and the metal catalyst layer M 1. And a metal oxide layer (M2) containing a metal oxide.

The metal oxide layer (M2) may be selectively provided to apply the metal catalyst layer (M1) to the surface of the metal member (S). More specifically, when the metal catalyst layer M 1 is coated on the metal member S by a dipping method or a spraying method, the metal oxide layer M 2 serving as a support is coated on the metal member, and then the metal catalyst layer M 1 ) Is preferably formed. When the metal catalyst layer M1 is coated on the metal member S by a plating method or a sputtering method, the metal oxide layer M2 may be selectively included.

25 and 26, it goes without saying that the metal oxide layer may be formed solely on the surface of the metal member.

27 is a view showing a control block diagram of the cooking apparatus 1 according to an embodiment.

27, the cooking apparatus 1 according to an embodiment includes a control panel 15, a heater 34, a convection fan 36, an exhaust fan 42, a first sensor 91, A driver 92, a driver 84, and a controller 86. The first sensor 91 and the second sensor 92 may be optionally included as needed.

As described above, the input unit 16 of the control panel 15 receives various commands for the operation of the cooking appliance 1 from the user, and the display unit 17 displays various operation information to the user. For example, the input unit 16 may include an operation mode input unit and a deodorization mode input unit, and the display unit 17 may include an operation information display unit and a deodorization information display unit.

The first sensor 91 senses contaminants contained in the cooking gas. The cooking gas may include water vapor, combustion oxides, oil mist, etc. The first sensor 91 may sense the concentrations thereof and sense contaminants contained in the cooking gas.

The second sensor (92) senses whether or not the object to be cooked is received in the cooking chamber (18). The second sensor 92 may be a temperature sensor or an optical sensor.

Although not shown in FIG. 27, in the case where the cleaning mode of FIG. 17 is applied to the cooking apparatus 1 according to the present embodiment, a temperature sensor 80 for sensing the temperature inside the cooking chamber 18 can be employed Of course.

Information sensed by the first sensor 91 and the second sensor 92 is transmitted to the control unit 86 and the control unit 86 transmits the data collected from the first sensor 91 and the second sensor 92 It is possible to control the time when the deodorizing mode is performed based on the result.

The driving unit 84 outputs a driving signal to each component of the cooking appliance 1. The driving unit 84 may include a first fan motor 37 for driving the convection fan 36 and a second fan motor 43 for driving the exhaust fan 42.

The control unit 86 controls the overall operation of the cooking appliance 1 and the signal flow between the internal components of the cooking appliance 1 and processes the data. The control unit 86 may execute an operating system (OS) and various applications stored in the storage unit 82 when the input of the user or predetermined conditions are satisfied.

The control unit 86 can control the heater 34 and the convection fan 36 so that the food stored in the cooking chamber 18 can be cooked when the operation mode of the cooking apparatus 1 is inputted from the user. Also, when the deodorization mode of the cooking appliance 1 is inputted from the user, the heater 34, the convection fan 36 and the like can be controlled so that the deodorization mode is performed.

In the cooking chamber 18 of the cooking appliance 1 having the above-described structure, the cooking gas such as water vapor and combustion oxide may be generated in the cooking process due to the characteristic of the heating cooking. The cooking gas is introduced into the room, . Thus, if the air inside the cooking chamber 18 of the oven 10 is contaminated by the cooking appliance 1 several times, the contaminated air inside the cooking chamber 18 is decomposed and the odor is removed.

The cooking device 1 according to the present embodiment can be controlled so that odor of the cooking gas generated during cooking is effectively removed by operating the deodorization mode when the air inside the cooking chamber 18 is contaminated, So that the combustion gas can be effectively decomposed through the metal foam MF. The process of cleaning the cooking appliance 1 according to the present embodiment can be applied to the same process as that of FIG. 17, so that the description overlapping with FIG. 17 is omitted.

Hereinafter, a deodorization mode control process of the cooking appliance 1 according to an embodiment will be described.

28 is a view showing a control process of the cooking apparatus 1 according to an embodiment.

When the user operates the deodorizing mode through the input unit 16 of the cooking apparatus 1 control panel 15, the degree of contamination inside the cooking chamber 18 is determined, and the heater 34 and the convection fan 36 are controlled. More specifically, if the contamination inside the cooking chamber 18 is sensed through the first sensor 91 and the degree of contamination inside the cooking chamber 18 as a result of the detection of the first sensor 91 is determined to be equal to or higher than a predetermined level, The heater 34 and the convection fan 36 are controlled so that the deodorizing mode proceeds. At this time, as the first sensor 91, a gas sensor can be used.

28, when the operation of the deodorization mode is started, the convection fan 36 is rotated by the first fan motor 37 and the cooking gas in the cooking chamber 18 is sucked into the convection fluid portion through the suction hole 22 And the sucked cooking gas is heated by the heater 34 formed at the outer periphery of the convection fan 36. [ The air heated by the heater 34 is collected in the metal foam MF while being in contact with the metal foam MF mounted on the surface of the heater 34 in the circumferential direction and is supplied to the high temperature catalyst coated on the surface of the metal foam MF In real time.

Since the temperature of the catalyst varies depending on the kind of the catalyst, the temperature of the heater 34 can be controlled according to the kind of the high temperature catalyst contained in the metal foam (MF). In addition, since the catalyst itself does not change during the reaction and promotes the reaction, the metal foam (MF) according to one embodiment includes a platinum-based catalyst on the surface thereof to semi-permanently decompose the pollutant.

When the cooking appliance 1 includes the second sensor 92, it is possible to detect whether the cooking object is accommodated in the cooking chamber 18 before the deodorizing mode is performed after the contamination degree determination process.

The operation of the heater 34 and the convection fan 36 can be controlled so that the deodorization mode does not proceed if it is determined that the cooking object is accommodated in the cooking chamber 18 as a result of the detection of the second sensor 92. [

The cooking device 1 may further include a door locking device and the door 20 of the cooking appliance 1 may be closed using the door locking device while the deodorization mode is being performed by the control device 86 .

FIG. 29 is a view showing an effect of reducing the contamination of the cooking appliance 1 according to an embodiment. FIG. 29 (a) is a view showing a change in concentration of carbon monoxide according to time during pyro cleaning. FIG. 29 (b) is a graph showing changes in the concentration of carbon monoxide during cooking when the mackerel is cooked by the cooking device 1 according to the embodiment FIG. 2 is a view showing the decomposition effect of the cooking gas.

The horizontal axis of FIG. 29 (a) represents time, and the vertical axis represents the concentration of carbon monoxide. The carbon monoxide is a toxic gas generated by the incomplete combustion of a cooking object during the cooking process. Referring to FIG. 29, compared with the conventional cooking device 1 in which the metal foam MF is not mounted, In the case of the device (1), it was confirmed that the amount of carbon monoxide measured on the surface area was reduced to more than half.

The horizontal axis of FIG. 29 (b) indicates the type of cooking gas generated according to the cooking time of the mackerel by the cooking apparatus 1, and the vertical axis indicates the amount of the cooking gas generated in accordance with the cooking interval it means. Further, the four peaks are respectively labeled with benzaldehyde (P1), nonanal (P2), 2-decanal, (E) -, (2-Decanal, (E) (2-Undecanal, P4).

Referring to FIG. 29 (b), the cooking apparatus 1 according to the embodiment has the benzaldehyde 99% as compared with the conventional cooking apparatus 1 without the metal foam MF , 99% for 2-decanal, (E) -, (2-Decanal, (E) -), 75% for Nonanal, 99% for 2-Undecanal, And the size of the sample was decreased. In other words, it was confirmed that the cause of the odor generated when the mackerel was roasted was adsorbed on the metal foam (MF) or decomposed and decreased.

Next, various applications of the metal foam MF in the cooking appliance 1 according to the embodiment will be described.

30 is a view showing the configuration of the cooking apparatus 1 in which the metal foam MF is mounted between the heater 34 and the rear plate 14 of the main body 11. [

Referring to Fig. 30, in the cooking apparatus 1, the metal foam MF is positioned between the heater 34 and the rear plate 14 of the main body 11, unlike Fig. When the metal foam (MF) is mounted in the arrangement as shown in Fig. 30, direct contact between the object to be cooked and the metal foam (MF) can be avoided. Further, the metal foam (MF) is prevented from being directly damaged by contact with the heater (34), and heat transfer efficiency can be improved.

31 is a view showing a configuration of the cooking apparatus 1 in which the metal foam MF is mounted on the rear plate 14 of the main body 11. Fig.

31, at least one metal foam MF may be provided around the suction hole 22 and the discharge hole 23 of the rear plate 14 of the main body 11. [ 31, when the metal foam MF is mounted, most of the contaminants contained in the cooking gas flowing toward the convection fan 36 can be adsorbed and decomposed, thereby increasing the contamination throughput.

32 is a view showing a configuration of the cooking apparatus 1 in which the rear plate 14 of the main body 11 is formed of a metal foam MF.

Referring to FIG. 32, unlike FIG. 31, the entire rear plate 14 of the cooking apparatus 1 can be formed into a metal foam MF. As shown in FIG. 32, when the rear plate 14 is formed of the metal foam MF, the surface area of the reaction in which contaminants contained in the cooking gas are adsorbed and decomposed can be maximized, thereby maximizing the contamination throughput. In addition, the decomposition reaction can be induced in both the suction hole 22 and the discharge hole 23, so that the decomposition efficiency can be maximized.

33 is a view showing the configuration of the cooking device 1 having the metal foam MF attached to the surface of the convection fan 36. Fig. 34 is a view showing the configuration of the cooking device 1 formed by molding the convection fan 36 with the metal foam MF (1) according to an embodiment of the present invention.

33 and 34, the convection system has a structure in which a circular heater 34 surrounds the periphery of the convection fan 36. When the metal foam MF is attached to the surface of the convection fan 36, Even when the fan 36 itself is formed of a metal foam MF, an effect similar to that of the cooking appliance 1 shown in Fig. 24 in which a cylindrical metal foam MF is directly mounted on the surface of the heater 34 can be expected. However, in the case of FIGS. 33 and 34, there is an advantage that direct contact between the heater 34 and the metal foam MF can be avoided.

Thus, the cooking apparatus 1 including the metal foam MF and the control method thereof have been described. Next, the cooking apparatus 1 including both the filter 50 and the metal foam MF and a control method thereof will be described.

Fig. 35 is a configuration diagram showing the configuration of the cooking apparatus 1 including both the filter 50 and the metal foam MF.

35, the cooking apparatus 1 may be configured to include an oven 10, a cooktop 60, and a drawer 70. The cooktop 60 and the drawer 70 are substantially the same as the constitutions of Figs. 2 and 24, and the description thereof is omitted.

The oven 10 is installed at the bottom of the cooktop 60 to cook food by heat convection.

The oven 10 includes a main body 11 having a cooking cavity 18 formed therein, a heating source for heating air inside the cooking cavity 18 of the main body 11, A filter 50 installed in at least one of the cooking chamber 18 and the vent 40 and collecting the gas generated in the cooking chamber 18; And a metal foam (MF) for collecting and decomposing the cooking gas generated in the process. The description of the main body 11, the heating source, the vent portion 40, the filter 50 and the metal foam MF can be similarly applied to the embodiments described above, and a repeated description thereof will be omitted.

The cooking device 1 according to the present embodiment includes the filter 50 and the metal foam MF at the same time so that the gas or the particles generated during the cooking process and the cleaning process can be simultaneously collected or disassembled.

In addition, it is also possible to perform the stepwise temperature control cleaning process illustrated in FIGS. 17, 20, and 21, the process of detecting whether the filter 50 is blocked as shown in FIG. 22, Or the like can be individually or simultaneously performed so that the gas and / or the particles generated in the cooking process and the cleaning process can be effectively captured and / or disassembled. In this regard, a description overlapping with the above description is omitted.

The cooking appliance 1 and the control method thereof have been described above. It is to be understood that the technical idea of the invention is not limited to the above-described embodiments, but is to be broadly construed as a concept including modifications within a range that can be easily conceived by those skilled in the art.

1: Cooking appliance 10: oven
11: main body 12: upper plate
13: bottom plate 14: rear plate
15: Control panel 16: Input section
17: Display section 18:
19: Tray 20: Door
21: viewing window 30: heating source
32: heater module 33: fan cover
34: heater 35: convection module
36: Convection fan 37: First fan motor
40: Vent section 41: Fan cover
42: exhaust fan 43: second fan motor
44: suction hole 50: filter
51: cylindrical member 52: metal sheet
53: corrugated sheet 54: flat sheet
56b, 56d: catalyst sheet 57c, 57d: metal oxide sheet
60: Cooktop 70: Drawer
80: first temperature sensor 81: second temperature sensor
82: storage unit 90: alarm unit
MF: Metal Foam M1: Metal catalyst layer
M2: metal oxide layer

Claims (25)

A body having a cooking chamber formed therein;
A vent portion for discharging the gas inside the cooking chamber to the outside of the main body; And
And a filter installed in at least one of the cooking chamber and the vent and collecting gas or soot generated in the cooking chamber,
Wherein the filter comprises a metal sheet. The method according to claim 1,
The filter includes:
Upper and lower open cylindrical members; And
And a metal sheet wound around the center axis of the cylindrical member. 3. The method of claim 2,
The metal sheet may include:
A golf club comprising: a plurality of floorboards;
The above-
Wherein the cylindrical member is wound in a spiral shape with respect to a center axis of the cylindrical member. The method of claim 3,
The floor of the corrugated sheet and the corrugation are,
A cooking appliance having a height difference of 1 mm or more and 5 mm or less. The method of claim 3,
The above-
Wherein a distance from a first floor to a second floor of the floor or a distance from a first point to a second point of the valley is greater than a height difference between the floor and the valley. The method of claim 3,
The above-
Wherein the cylindrical member is wound so as to have a helical angle of at least 50 DEG and less than 90 DEG with respect to the central axis of the cylindrical member. 3. The method of claim 2,
The metal sheet may include:
And a flat sheet joined to the corrugated sheet,
The golf club head according to claim 1,
Wherein the cylindrical member has a structure that is joined to each other and wound in a spiral shape with respect to the central axis of the cylindrical member. 3. The method of claim 2,
The metal sheet may include:
And a catalytic sheet comprising at least one platinum group metal element selected from the group consisting of platinum (Pt), rubidium (Rd) and rhodium (Rh). 3. The method of claim 2,
The metal sheet may include:
Wherein the metal oxide sheet comprises at least one metal oxide selected from the group consisting of aluminum oxide (Al2O3), magnesium oxide (MgO), and copper oxide (CuO). 3. The method of claim 2,
Wherein the cylindrical member comprises:
And the height of the cylindrical member is larger than the diameter of the cylindrical member. 3. The method of claim 2,
Wherein the cylindrical member comprises:
And at least one selected from the group consisting of a metal, a ceramic, and a ceramic. The method according to claim 1,
Preferably,
And at least one selected from the group consisting of steam, flue gas, and cooking gas. The method according to claim 1,
The cooking chamber includes:
Wherein the filter is detachable. 14. The method of claim 13,
The fixing unit includes:
Wherein the cooking chamber is provided at a position higher than at least one tray mounting rail mounted in the cooking chamber. The method according to claim 1,
And a suction hole formed at one side of the cooking chamber so that gas in the cooking chamber flows into the vent portion,
The filter includes:
And is fixed around the suction hole. The method according to claim 1,
The filter includes:
And at least one temperature sensor for detecting clogging of the filter. The method according to claim 1,
And a metal foam for collecting and disassembling the gas inside the cooking chamber. The method according to claim 1,
A heating source for heating the cooking chamber; And
And a control unit for controlling the heating source so that the temperature of the cooking chamber is gradually raised. 19. The method of claim 18,
Wherein,
The heating source is controlled so that the temperature of the cooking chamber is maintained for a first time preset to a first predetermined temperature and the temperature of the cooking chamber is maintained for a second predetermined time set at a predetermined second temperature higher than the first temperature Cooking appliances. Controlling the temperature of the cooking chamber to be maintained at a predetermined first temperature for a first predetermined time; And
And controlling the temperature of the cooking chamber to be maintained for a second predetermined time that is a preset second temperature higher than the first temperature. 21. The method of claim 20,
Wherein the first time and the second time are time-
Wherein the cooking time is 5 minutes or longer. 21. The method of claim 20,
The first temperature may be, for example,
Wherein the temperature is in the range of 250 to 300 占 폚. 21. The method of claim 20,
The second temperature may be,
Wherein the temperature is in the range of 420 to 450 占 폚. 21. The method of claim 20,
And a final stage in which the heating source is operated so that the temperature of the cooking chamber is maintained for a third predetermined time set at a predetermined third temperature higher than the second temperature. 25. The method of claim 24,
The third time,
Wherein the cooking time is at least 30 minutes.

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