KR101687184B1 - Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven - Google Patents

Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven Download PDF

Info

Publication number
KR101687184B1
KR101687184B1 KR1020150122865A KR20150122865A KR101687184B1 KR 101687184 B1 KR101687184 B1 KR 101687184B1 KR 1020150122865 A KR1020150122865 A KR 1020150122865A KR 20150122865 A KR20150122865 A KR 20150122865A KR 101687184 B1 KR101687184 B1 KR 101687184B1
Authority
KR
South Korea
Prior art keywords
water
heat exchanger
temperature
supply pipe
motor
Prior art date
Application number
KR1020150122865A
Other languages
Korean (ko)
Inventor
김태준
박문영
손윤기
Original Assignee
린나이코리아 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 린나이코리아 주식회사 filed Critical 린나이코리아 주식회사
Priority to KR1020150122865A priority Critical patent/KR101687184B1/en
Application granted granted Critical
Publication of KR101687184B1 publication Critical patent/KR101687184B1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C13/00—Stoves or ranges with additional provisions for heating water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/006—Arrangements for circulation of cooling air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cookers (AREA)

Abstract

Disclosed are a device for preventing overheat of a motor and reducing thermal deformation of a steam oven and a method for the same. According to the present invention, the steam oven includes: a heat exchanger attached to a driving motor driving a blower in a cooking chamber; a direct injection supply pipe supplying water heated by passing through the heat exchanger to an injection in the cooking chamber; a water electromagnetic valve controlling a water supply pipe A and a water supply pipe B supplying the water to the heat exchanger; and a control unit controlling the water electromagnetic valve in accordance with a condition of the cooking chamber sensed by a temperature sensor. The driving motor is cooled by the heat exchanger, and the water heat-exchanged is supplied into the cooking chamber. So, temperature difference of the water supplied and the inside of the cooking chamber is reduced, and thermal impact and the thermal deformation of a component in the cooking chamber are minimized.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a steam oven for reducing thermal deformation of a steam oven,

The present invention relates to an apparatus and method for preventing thermal deformation of a steam oven and an overheating of a motor, and more particularly, to a steam oven having a heat exchanger for cooling a motor of a steam oven, The present invention relates to a device for preventing thermal deformation of a steam oven and a method of preventing overheating of a motor, which minimizes thermal shock and thermal deformation of parts in a cooking chamber by reducing the temperature difference between the feed water and the inside of the cooking chamber.

Generally, a steam oven is a cooking appliance for cooking food using water vapor supplied to a cooking chamber, and a direct injection steam oven provides water vapor by spraying water directly into a hot cooking chamber.

FIG. 1 is a sectional side view showing a schematic configuration of a conventional direct injection steam oven. The water supply device includes a water inlet 2 directly connected to the water supply pipe 1 and a direct injection supply pipe 3, And the steam generated is diffused into the interior of the cooking chamber 7 by the blower 6 driven by the driving motor 5 will be.

However, in the conventional steam oven, the hot air in the cooking chamber directly contacts the inside of the cooking chamber, and the heat is conducted through the motor shaft by the installed blower, thereby increasing the temperature of the driving motor for driving the blower.

In addition, in order to drive the blower, a problem arises that the durability of the motor is deteriorated due to overheating at a high temperature in association with an increase in the winding temperature of the drive motor itself generated by the operation of the drive motor.

Therefore, overheating temperature is also transferred to the electric components around the motor, thereby deteriorating the endurance performance of the electric component.

In addition, in the direct injection oven, there is a problem that the internal components of the cooking chamber are thermally deformed by injecting cold water into the blower inside the hot cooking chamber heated to a high temperature.

That is, the cold water of the water pipe supplied to the injector through the direct injection supply pipe is injected into the blower of the hot cooking chamber, and a thermal shock is applied due to the difference in thermal expansion due to the temperature difference between the water- There is a problem in that it is thermally deformed.

Patent Document 1. Korean Patent Application No. 10-2010-0115669 Patent Document 2: Korean Patent Application No. 10-2013-0075767

It is an object of the present invention to provide a steam oven which is provided with a heat exchanger provided closely to a drive motor so as to prevent a temperature of a motor and an electric motor near the motor from being increased to overheat, And an apparatus and method for preventing overheating of the motor.

It is another object of the present invention to provide a direct injection oven capable of reducing the thermal deformation of a steam oven by minimizing thermal shock and thermal deformation in a cooking chamber by supplying water heated by the heat exchanger to a hot- An apparatus for preventing overheating of a motor and a method thereof.

It is another object of the present invention to provide a steam generator which is capable of preventing a drive motor from being overheated by supplying cold water to a separate cooling line by way of a water pipe, An apparatus for preventing thermal deformation of an oven and an overheating of a motor, and a method thereof.

According to an aspect of the present invention, there is provided a steam oven comprising: a heat exchanger provided closely to a driving motor for driving a blower in a cooking chamber; A direct injection supply pipe for supplying heated water passing through the heat exchanger to the injector in the cooking cavity; A water column for interrupting the water supply pipe A and the water supply pipe B supplied to the heat exchanger; And a control unit for controlling the water valve according to conditions of the cooking chamber sensed by the temperature sensor. .

According to the embodiment of the present invention, the heat exchanger is constituted by forming a direct water pipe inside or outside the case of the drive motor.

According to the embodiment of the present invention, the heat exchanger is characterized by being formed in a hollow shape, a tank shape, or a pipe shape.

According to the embodiment of the present invention, the heat exchanger is provided with a water supply pipe B having a water flow switch connected from the water inlet to check the supply of the cooling water, and a cooling water discharge pipe for discharging the cooling water.

According to an embodiment of the present invention, the control unit controls the water level of the water supply pipe B in accordance with a signal from a temperature sensor A that senses the temperature of water passing through the heat exchanger.

In the embodiment of the present invention, the thermal deformation of the steam oven and the prevention of overheating of the motor are performed by supplying the water supplied by the water supply pipe A to the heat exchanger provided in the drive motor to supply the heat- A first stage cooling process; And a second-stage cooling process in which the cooling water supplied through the water supply pipe B is passed through a heat exchanger provided in the driving motor to perform heat exchange, and then the cooling water is discharged through the cooling water discharge pipe.

In the embodiment of the present invention, the second step cooling step may include: a feed water temperature measuring step of supplying the heat exchanged feed water to the heat exchanger through the water feed pipe A to the injector, and measuring the temperature of the feed water; A temperature comparing step of comparing the measured temperature from the supplying water temperature measuring step with a preset temperature of the predetermined steam oven; A coolant supply step of supplying coolant water by controlling the water inlet of the water supply pipe B when it is determined that the temperature of the heat-exchanged water in the temperature comparison step is over the set temperature; And a control unit.

The present invention prevents overheating by supplying cold water to the heat exchanger provided around the case of the driving motor, thereby improving the durability of the motor and preventing overheating of electrical parts around the motor, thereby improving the quality of the steam oven .

In addition, since the primary heated water passing through the heat exchanger is injected into the hot cooking chamber, the temperature difference is minimized, thereby minimizing the thermal impact of the internal components of the cooking chamber, and reducing the thermal deformation, thereby enhancing the reliability of the product.

1 is a side cross-sectional view showing a schematic configuration of a conventional direct injection steam oven;
2 is a side cross-sectional view showing a schematic configuration of a direct injection steam oven according to an embodiment of the present invention;
3 is a control block diagram of a steam oven according to an embodiment of the present invention.
4 is a flowchart illustrating a drive motor cooling operation path according to an embodiment of the present invention.

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

FIG. 2 is a side cross-sectional view showing a schematic configuration of a direct injection steam oven according to an embodiment of the present invention, FIG. 3 is a block diagram of a controller of a steam oven according to an embodiment of the present invention, 2 is a flowchart showing a drive motor cooling operation path.

The steam oven according to the embodiment of the present invention improves the channel of the water supply device for supplying the steam to the cooking chamber 100 to prevent the drive motor 110 from being overheated by the heat exchanger 200, The heated supply water is supplied to the cooking chamber 100 to prevent thermal deformation of the components inside the cooking chamber.

A blower 120 is installed in the cooking chamber 100 and a driving motor 110 for driving the blower 120 is installed outside the cooking chamber 100.

A heater (150) and a temperature sensor (310) are installed in the cooking chamber (100).

The blower 120 uniformly distributes water vapor inside the cooking chamber 100 so that water vapor is uniformly penetrated into the food to uniformly cook the food, and the blower 120 is installed under very hot temperature conditions.

Accordingly, when the steam oven is operated, the blower 120 is exposed to high temperature to maintain a high temperature. Since the blower 120 is directly connected to the driving motor 110 by the motor shaft, heat is transferred by the heat conduction through the motor shaft, The temperature of the motor 110 rises.

The heat exchanger 200 installed in close contact with the case of the driving motor 110 for lowering the temperature of the driving motor 110 and performing heat exchange is provided in the embodiment of the present invention.

The heat exchanger 200 is formed by forming a direct water pipe inside or outside the case of the driving motor 110.

The heat exchanger 200 is installed to surround the outer surface of the case of the driving motor 110 and has a hollow shape so that heat exchange can be sufficiently performed.

As another embodiment of the present invention, the heat exchanger 200 may be configured as a tank type surrounding the case of the driving motor 110, or may be constructed as a pipe type which is piped in close contact with the case of the driving motor 110 It is possible.

Meanwhile, the water in the water pipe 130 is supplied to the heat exchanger 200 through the water supply pipe A 230, and the water heated by the heat exchange is supplied to the inside of the cooking chamber 100 through the direct injection pipe 220. And is supplied to the injector 210.

A temperature sensor A (320) is installed on the duct of the direct injection supply pipe (220) to measure the temperature of the water flowing therein and to apply a signal to the controller (300).

A water valve 260 is provided between the water supply pipe A 230 for supplying water to the heat exchanger 200 and the water pipe 130.

In addition, a water supply pipe B 240 and a cooling water discharge pipe 250 are additionally installed in the heat exchanger 200 as a separate pipe.

The water supply pipe B 240 connected to the water level switch 260 for supplying the cooling water is provided with a water flow switch 270 for sensing a pipe line and a cooling water discharge pipe 250 for discharging water passing through the heat exchanger 200 ).

3 is a block diagram of a controller of a steam oven according to an embodiment of the present invention.

The water supply pipe A 230 for supplying water to the heat exchanger 200 and the water supply pipe B 240 are controlled by the control of the control unit 300 so that the supply of water is interrupted by the water valve 260, Whether to supply is determined.

The control unit 300 controls the water valve 260 according to the condition of the cooking chamber 100 sensed by the temperature sensor 310 installed in the cooking chamber 100 to supply the water supply pipe A 230 Thereby supplying water and generating water vapor.

A water supply pipe B 240 provided with a water flow switch 270 as a separate conduit and a cooling water discharge pipe 250 are installed in the heat exchanger 200 to perform a second stage cooling process when the drive motor 110 is overheated Respectively.

In the embodiment of the present invention configured as described above, the water heated by heat exchange while being supplied to the cooking chamber 100 by the heat exchanger 200 while cooling the driving motor 110 is sprayed to decrease the temperature difference, Minimize thermal shock, and minimize thermal deformation.

The operating state of the steam oven according to the embodiment of the present invention will be described more specifically.

A method for reducing thermal deformation of a steam oven and preventing overheating of a motor according to the present invention includes a first stage cooling process by a water supply pipe A (230); And a second stage cooling process by the water supply pipe B 240 to prevent the motor from overheating and reduce the thermal deformation.

In the first step cooling process, the feed water supplied by the water supply pipe A 230 is passed through the heat exchanger 200 provided in the drive motor 110 to supply the heat-exchanged feed water into the cooking chamber 100 .

The temperature of the supply water supplied through the first-stage cooling process is increased so that the temperature difference between the internal components of the cooking chamber 100 and the water to be sprayed is reduced, thereby minimizing the thermal shock and thermal deformation.

That is, in normal operation, the supply water supplied through the water supply pipe A 230 is heat-exchanged through the heat exchanger 200 and is supplied in an elevated state to reduce thermal deformation of the internal parts of the cooking chamber, Is cooled by the heat exchanger (200).

However, when the temperature of the driving motor 110 is gradually increased due to the long use or other circumstances, the second stage cooling process is performed by the water supply pipe B 240 as a separate cooling pipe.

In the second step cooling process, the cooling water supplied through the water supply pipe B 240 is passed through the heat exchanger 200 provided in the driving motor 110 to perform heat exchange, and then the cooling water is discharged through the cooling water discharge pipe 250 .

The temperature of the water supplied to the injector 210 in the cooking chamber 100 through the direct injection supply pipe 220 is lower than the set temperature And is a separate cooling line for cooling the heat exchanger 200 when the temperature is high.

The control unit 300 determines whether or not cooling water is supplied according to a signal from a temperature sensor A 320 that senses the temperature of the water passing through the heat exchanger 200 and controls the water flow switch 270 of the water supply pipe B 240, It is determined whether or not the water supply pipe B 240 is supplied with the cooling water.

When the temperature sensor A 320 measures the temperature of the water flowing in the direct injection supply pipe 220 and applies a signal to the control unit 300, Compare the temperature and the measured temperature.

When the measured temperature is higher than the set temperature as a result of the comparison by the controller 300, the microcomputer 350 controls the water supply pipe B 240 through the water supply pipe B 240 according to the sensing signal of the water- The temperature of the heat exchanger 200 and the driving motor 110 is lowered by discharging the hot water exchanged through the cooling water discharge pipe 250 to the heat exchanger 200.

On the other hand, the water supply pipe B 240 for supplying cooling water from the water level switch 260 is provided with a water flow switch 270 for sensing water supply. When supplying the cooling water through the water supply pipe B 240, The control unit 300 controls the sensing signal of the water flow switch 270.

That is, the controller 300 controls the water valve 260 according to a sensing signal of the water-valve drive circuit 360 and the water flow switch 270 in response to a command from the microcomputer 350.

Preferably, the water valve 260 is a 3-way solenoid valve for interlocking the water supply pipe A 230 and the water supply pipe B 240 supplied to the heat exchanger 200 together.

Therefore, the second stage cooling process by the water supply pipe B 240 is performed only when the driving motor 110 is not sufficiently cooled by the water supply pipe A 230, so that the heat exchanger 200 are compared with the preset temperature stored in the storage unit 320 to determine whether the water is supplied or not.

FIG. 4 is a flowchart illustrating a driving motor cooling operation path according to an embodiment of the present invention. In the second step cooling process, the thermal deformation of the steam oven and the overheat prevention of the motor are measured (S 10 , A temperature comparison step S20 (S50), and a cooling water supply step S30.

First, it is determined whether or not the steam oven is operated. In operation, a temperature measurement step (S10) is performed.

The temperature measurement step S10 is a step of measuring the temperature of the supplied water supplied through the water supply pipe A 230 and heated through the heat exchange in the heat exchanger 200 and then supplied through the direct injection pipe 220.

In the supply water temperature measuring step, the temperature value of the supply water measured by the temperature sensor A 320 is sent to the controller 300, and the measured temperature value and the predetermined temperature value are compared with each other.

The temperature comparison step S20 compares the temperature value measured in step S 10 with the set temperature value of the steam oven previously stored in the control unit 300.

Therefore, it is determined whether or not to perform the cooling process by the water supply pipe B (240) by the temperature comparison step (S20).

When the measured temperature value of the water is lower than the predetermined temperature value, the supply water is supplied to the heat exchanger 200 through only the water supply pipe A 230 to perform the cooling function of the drive motor 110 and the heating water supply function .

However, when the measured temperature value of the water is higher than the preset temperature value, the water valve 260 is opened and the direct water is supplied to the heat exchanger 200 through the supply pipe B 240 to cool the driving motor 110 .

That is, when it is determined that the temperature of the heat-exchanged water is overheated in the temperature comparison step S20, the water temperature of the water supply pipe B 240 is controlled to supply the cooling water (S30)

The cooling water supply step S30 is performed through the water supply pipe B 240 so that the temperature of the driving motor 110 is lowered by the cooling action by the heat exchanger 200. [

After the elapse of a predetermined time, the driving motor 110 is cooled and the temperature of the supplied water is also lowered, so that the temperature of the supplied water is measured (S40)

The temperature of the feed water is periodically measured through the temperature measurement step S40 to determine whether the drive motor 110 is overheated.

In the present invention, since the heated water supplied through the heat exchanger is supplied to the cooking chamber, a temperature difference between the heated cooking water and the components of the cooking chamber is reduced, so that normal steam ovens can be operated while reducing thermal deformation of components inside the cooking chamber.

As described above, according to the embodiment of the present invention, direct water is supplied through a heat exchanger provided in a case of a driving motor for driving a blower in a cooking chamber of a steam oven to thereby prevent overheating of the motor, The feed water is supplied to the inside of the cooking chamber to minimize thermal shock and thermal deformation, thereby achieving a dual effect by the heat exchanger.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

100: Cooking room
110: drive motor 120: blower
130: Water pipe 140: Hand shower
150: heater
200: heat exchanger
210: Injector 220: Direct injection supply pipe
230: Water supply pipe A 240: Water supply pipe B
250: Cooling water discharge pipe 260:
270: Water flow switch
300:
310: Temperature sensor 320: Temperature sensor A
330: storage unit 340: input unit
350: Microcomputer 360: Electrode driving circuit

Claims (7)

An apparatus for preventing thermal deformation of a steam oven and preventing overheating of a motor,
A heat exchanger (200) provided in close contact with a driving motor (110) for driving a blower (120) in a cooking chamber (100); A direct injection supply pipe 220 for supplying heated water passing through the heat exchanger 200 to the injector 210 in the cooking chamber 100; A water supply pipe A 230 for supplying water to the heat exchanger 200 and a water valve 260 for interrupting the water supply pipe B 240; And a control unit (300) for controlling the water valve (260) according to the condition of the cooking chamber (100) sensed by the temperature sensor,
A water supply pipe B 240 provided with a water flow switch 270 and a cooling water discharge pipe 250 for discharging cooling water are connected to the heat exchanger, Device to prevent oven heat distortion and overheating of motor. The method according to claim 1,
The heat exchanger (200)
And a direct water duct is formed on the inside or the outside of the case of the drive motor (110) to prevent thermal deformation of the steam oven and overheating of the motor.
3. The method according to claim 1 or 2,
The heat exchanger (200)
Wherein the steam oven has a hollow shape, a tank shape, or a pipe shape.
delete The method according to claim 1,
The method according to claim 1,
Wherein the control unit controls the water valve (260) of the water supply pipe (B) (240) according to a signal from a temperature sensor (A) (320) sensing the temperature of the water passing through the heat exchanger Device to prevent motor overheating.
As a method for reducing thermal deformation of a steam oven and preventing overheating of a motor,
A first stage cooling process for supplying the supply water supplied by the water supply pipe A 230 to the heat exchanger 200 provided in the drive motor 110 to supply the heat-exchanged supply water into the cooking chamber 100; And a second stage cooling process in which the cooling water supplied through the water supply pipe B 240 is passed through the heat exchanger 200 provided in the driving motor 110 to perform heat exchange and then the cooling water is discharged through the cooling water discharge pipe 250 Lt; / RTI >
The second step cooling step may include: a feed water temperature measurement step of supplying the heat exchanged feed water to the heat exchanger through the water feed pipe A to the injector and measuring the temperature of the feed water; A temperature comparing step of comparing the temperature measured from the supplying water temperature measuring step with the preset temperature of the predetermined steam oven; And a cooling water supplying step of supplying water to the water supply pipe B by controlling the water side of the water supply pipe B when it is determined that the temperature of the water heat exchanged in the temperature comparison step is over the set temperature, A method for preventing overheating. delete
KR1020150122865A 2015-08-31 2015-08-31 Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven KR101687184B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150122865A KR101687184B1 (en) 2015-08-31 2015-08-31 Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150122865A KR101687184B1 (en) 2015-08-31 2015-08-31 Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven

Publications (1)

Publication Number Publication Date
KR101687184B1 true KR101687184B1 (en) 2016-12-16

Family

ID=57735630

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150122865A KR101687184B1 (en) 2015-08-31 2015-08-31 Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven

Country Status (1)

Country Link
KR (1) KR101687184B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940007452A (en) * 1992-09-02 1994-04-27 이헌조 Microwave steam generator and its control method
JP2003102147A (en) * 2001-09-26 2003-04-04 Nissan Motor Co Ltd Cooling device for motor
KR20100115669A (en) 2009-04-20 2010-10-28 (주)전통아이엔지 Block having protruding lining mark and an interlocking block and manufacturing method of the same
KR20120073596A (en) * 2010-12-27 2012-07-05 주식회사 대우일렉트로닉스 Cooler for micro wave oven
KR20130075767A (en) 2011-08-12 2013-07-05 리서치 인 모션 리미티드 Portable electronic device and method of controlling same
KR101489333B1 (en) * 2013-08-30 2015-02-04 린나이코리아 주식회사 Draining and exhaust cooling system of combination steam oven and control method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940007452A (en) * 1992-09-02 1994-04-27 이헌조 Microwave steam generator and its control method
JP2003102147A (en) * 2001-09-26 2003-04-04 Nissan Motor Co Ltd Cooling device for motor
KR20100115669A (en) 2009-04-20 2010-10-28 (주)전통아이엔지 Block having protruding lining mark and an interlocking block and manufacturing method of the same
KR20120073596A (en) * 2010-12-27 2012-07-05 주식회사 대우일렉트로닉스 Cooler for micro wave oven
KR20130075767A (en) 2011-08-12 2013-07-05 리서치 인 모션 리미티드 Portable electronic device and method of controlling same
KR101489333B1 (en) * 2013-08-30 2015-02-04 린나이코리아 주식회사 Draining and exhaust cooling system of combination steam oven and control method

Similar Documents

Publication Publication Date Title
JP3781759B2 (en) Steam cooker
JP4589825B2 (en) Cooking equipment
CN108851969A (en) Cooking method and electric pressure cooker using same
CN103784003B (en) Steam cooking control method, steam cooking control system and steam cooking apparatus
KR20060133463A (en) Heating cooker
JP2019020014A (en) Heating cooker
KR20110076019A (en) Method for continuous cooking in electric rice-cooker
KR101687184B1 (en) Apparatus and method for thermal protection of the motor and reducing the thermal deformation of the steam oven
KR100812177B1 (en) Apparatus and method for controlling heat of electric cooker
KR101671805B1 (en) Induction heating cooker
US8694167B2 (en) Method for controlling vacuum pumps in an industrial furnace complex
JP5741912B2 (en) Combustion device
KR101458511B1 (en) Co-generation system and a method of the same
JP6037462B2 (en) Heating system
KR101466861B1 (en) Method for Control of Convection Fan of Steam Oven
JP2011236905A (en) Method for cold-staring steam turbine
JP4732309B2 (en) Burn-in equipment
KR100667203B1 (en) A steam cooking apparatus and method to control the heater thereof
KR101735000B1 (en) Heating furnace
JP2006308199A (en) Cooker
KR101189386B1 (en) A control method of cooking appliance
KR101086101B1 (en) Steam oven and method for controlling the same
KR100351941B1 (en) A controlling method of cavity temperature in microwave oven
KR20210126801A (en) Electric boiler
KR20060118660A (en) A steam cooking apparatus and method to alarm the high temperature door thereof

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20191202

Year of fee payment: 6