KR20170100810A - overheating prevent system of gas range - Google Patents

overheating prevent system of gas range Download PDF

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Publication number
KR20170100810A
KR20170100810A KR1020160023149A KR20160023149A KR20170100810A KR 20170100810 A KR20170100810 A KR 20170100810A KR 1020160023149 A KR1020160023149 A KR 1020160023149A KR 20160023149 A KR20160023149 A KR 20160023149A KR 20170100810 A KR20170100810 A KR 20170100810A
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KR
South Korea
Prior art keywords
terminal
bimetal
gas
bimetal device
cover
Prior art date
Application number
KR1020160023149A
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Korean (ko)
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KR101850283B1 (en
Inventor
권태완
Original Assignee
주식회사 하츠
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Priority to KR1020160023149A priority Critical patent/KR101850283B1/en
Publication of KR20170100810A publication Critical patent/KR20170100810A/en
Application granted granted Critical
Publication of KR101850283B1 publication Critical patent/KR101850283B1/en

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    • 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/247—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using mechanical means
    • 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/02—Stoves or ranges for gaseous fuels with heat produced solely by flame
    • F24C3/027—Ranges
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • F23N2025/16—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2900/00—Special features of, or arrangements for controlling combustion
    • F23N2900/05005—Mounting arrangements for sensing, detecting or measuring devices

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Combustion (AREA)

Abstract

The present invention relates to an overheating prevention system of a gas range, including a bimetal device installed in the gas range and detecting an overheat state, and arranging the bimetal device disposed on the center of a burner head and protruding through a through-hole formed in a burner cover so as to allow the bimetal device to be in contact with the bottom surface of a cooking vessel; thus detecting a conductive heat of the heated cooking vessel. According to the present invention, the bimetal device comprises: a circular case; a buffering spring embedded in the case; a terminal box supported by the buffering spring; moving and fixated terminals arranged in the terminal box; a terminal cover installed on the upper surface of the terminal box; a bimetal disk installed in the inside of the upper surface of the terminal cover; an operation pin linked with the moving terminal; an inner cap installed in the upper part of the terminal cover to cover the bimetal disk; and an outer cap disposed on the upper side of the inner cap. Accordingly, the bimetal device is directly in contact with the cooking vessel, thus being able to correctly determine a temperature rise of the cooking vessel.

Description

An overheating prevent system of gas range

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas range overheat prevention system for preventing overheating of a gas range, thereby enhancing safety in use.

Generally, the gas range is a simple operation because the gas fuel is mixed with the air to perform the spark ignition, thereby causing a safety accident due to gas leakage or overheating due to carelessness of the user.

Therefore, in order to prevent such safety accidents, an overheat prevention system through a safety device is mandatory in the gas range.

Illustratively, according to the KS standard, it is specified that the safety device is operated at a maximum oil temperature of 300 ° C or lower so that the gas passage to the burner is closed and not automatically opened again.

The overheat protection system applied to the gas range can be roughly divided into two types, a thermistor type and a bimetal type.

In the thermistor type, the temperature of the bottom of the cooking vessel is read as a resistance value through a thermistor and sent to the control PCB of the gas range. In the control PCB, when the temperature measured by the thermistor corresponds to the high cut temperature, Gas supply is interrupted.

The bimetal system includes a bimetal device 6 connected in series to any one of a plurality of lines connecting the MPU and the thermocouple and spaced apart from the digestion thermocouple 4 at one side of the burner head 2 (See Fig. 1)

According to the conventional bimetal type overheat prevention system, when the cooking vessel is overheated and the radiant heat emitted from the cooking vessel exceeds a predetermined temperature, the bimetal device senses it and is switched off, thereby blocking gas supply from the MPU.

On the other hand, in such a conventional overheat prevention system, since a thermistor type requires expensive parts such as a control PCB, a consumer burden due to purchase of a gas range product is increased, and a problem such as a malfunction due to a failure of a control PCB have.

In the bimetal system, since the bimetallic device is disposed apart from the cooking vessel, the temperature of the cooking vessel is influenced by not only the radiant heat transmitted from the cooking vessel but also the temperature of the gas flame. do.

Illustratively, when a bimetal device having a high cut temperature of 180 DEG C is used and fried cooking is carried out at a temperature of 200 to 300 DEG C using edible oil, before the temperature of the contents contained in the cooking container reaches 300 DEG C, Was 180 ° C or more, and the bimetal device was off-switched to prevent overheating of the gas range.

However, when cooking is performed using water, the sensing temperature reaches the high cut temperature even before the temperature of the contents reaches the boiling point of water according to the shape of the cooking vessel, and the bimetal device is switched off, The operation of the range was stopped.

As described above, according to the conventional bimetal method, the sensing temperature of the bimetal device is determined based on the radiation emitted from the cooking container and the ignition flame, so that the temperature can not be measured accurately according to the requirements such as the shape of the cooking container There has been a problem that it is difficult to use the gas range effectively and precisely.

In order to solve such a problem, it is possible to consider a configuration in which the bimetal device is brought into direct contact with the cooking container. However, since the conventional bimetal device is not a heat resistant structure, There is a possibility that problems may occur due to thermal deformation or the like.

That is, in the case of a cooking vessel having a very high thermal conductivity, such as a pot, the amount of moisture contained therein evaporates, and the superheating speed becomes very high, and the high-cut temperature is rapidly exceeded.

In this case, the operation of the gas range is stopped by the bimetal device, but the cooking vessel has already reached a considerable overheating condition and consequently a thermal deformation of the components of the bimetal device is likely to occur.

If the conventional bimetal device causes a problem due to thermal deformation, even if the immediate shut-off operation is performed, the safety is not very low due to the use of the gas range because the re-operation is not normally performed .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a cooking apparatus and a cooking apparatus capable of accurately determining the temperature of the cooking vessel without being affected by the shape and material of the cooking vessel, The present invention also provides a bimetal device for preventing overheating of a gas range.

According to an aspect of the present invention, there is provided a system for preventing overheating of a gas range, the system including a bimetal device provided in a gas range for detecting an overheating state, the bimetal device being disposed at a center of the burner head, And is arranged to protrude through a through hole formed in the burner cover and to be in contact with the bottom surface of the cooking container, thereby sensing the conductive heat of the cooking container being heated.

The bimetal device includes a cylindrical case, a buffer spring incorporated in the case, a terminal passage supported by the buffer spring, a movable terminal and a fixed terminal disposed in the terminal tube, and a terminal A bimetal disk provided inside the upper surface of the terminal cover, an operating pin provided in a form vertically movable up and down through the terminal cover and interlocked with the movable terminal, An inner cap covering the bimetal disc, and an outer cap disposed above the inner cap.

The terminal-passing operation pin of the bimetallic device is made of a ceramic material having high heat resistance, and the movable terminal and the fixed terminal are made of brass (C2680R) material having good heat resistance and conductivity.

The movable terminal and the fixed terminal of the bimetal device are respectively provided with a movable contact and a fixed contact which are detachably in contact with each other, and the movable contact and the fixed contact are made of an Ag-alloy material.

The inner cap is made of an aluminum material and the outer cap is made of a stainless steel material.

As described above, according to the system for preventing overheating of the gas range according to the present invention, since the bimetal device directly contacts with the cooking container, it is possible to accurately judge the temperature rise of the cooking container and the main components of the bimetal device are heat resistant material The problem of thermal deformation is extremely low, which is advantageous in improving convenience and safety in use of the gas range.

1 shows a configuration of a gas range to which a conventional bimetal type overheat prevention system is applied
2 is a schematic diagram showing a configuration of a system for preventing overheating of a gas range according to the present invention
3 is an exploded perspective view showing a structure of a bimetal device applied to a system for preventing overheating of a gas range according to the present invention;
4 is a cross-sectional view showing a structure of a bimetal device applied to a system for preventing overheating of a gas range according to the present invention
5A and 5B are views showing an operating state of the bimetal device applied to the overheat prevention system of the gas range according to the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to FIGS. 2 to 5B.

2, the system for preventing overheating of the gas range includes a bimetal device 10 provided in a gas range for sensing an overheating state. The bimetal device 10 includes a burner head 2, And is disposed so as to protrude through a through hole formed in the burner cover 3 so as to be in contact with the bottom surface of the cooking container C.

3 and 4, the bimetal device 10 includes a cylindrical case 12, a cushion spring 14 built in the case 12, and a cushion spring 14 supported by the cushion spring 14. [ A movable terminal 18 and a fixed terminal 19 disposed in the terminal case 16; a terminal cover 20 provided on an upper surface of the terminal case 16; An inner cap 26 provided on the top of the terminal cover 20 to cover the bimetal disc 22 and a bimetal disc 22 mounted on the bimetal disc 22, And an outer cap 28 disposed above the inner cap 26. The operation cap 24 is mounted on the operation cap 24 to move up and down.

The terminal cylinder 16 and the operation pin 24 of the bimetal device 10 are made of a ceramic material having high heat resistance.

The movable terminal 18 and the fixed terminal 19 of the bimetal device 10 are made of brass (C2680R) material having good heat resistance and conductivity.

The movable contact 181 and the fixed contact 19 of the bimetal device 10 are provided with a movable contact 181 and a fixed contact 191 which are detachably in contact with each other, (191) is made of an Ag-alloy material.

The movable terminal 18 has the same shape as a leaf spring and has a structure that can be elastically deformed by the pressing of the operation pin 24 as described later.

The terminal cover 20 is coupled to the terminal cylinder 16 so that the movable terminal 18 and the fixed terminal 19 are not exposed to the outside. The upper surface of the terminal cover 20 is supported by the end of the bimetal disk 22 A jaw portion 201 is formed.

Also, the inner cap 26 is made of an aluminum material, and the outer cap 28 is made of a stainless steel material.

The operation of the overheat prevention system of the gas range according to the present invention will now be described.

The bimetal device 10 is disposed at the center of the burner head 2 and protrudes through the through holes formed in the burner cover 3 so that when the cooking container C is seated in the cooking position, The outer cap 28 of the bimetal device 10 and the bottom surface of the cooking container C are brought into direct contact with each other. At this time, the impact of the contact between the cooking container C and the outer cap 28 is alleviated by the buffer spring 14.

The change in temperature of the cooking container C is transmitted to the bimetal device 10 in a precise manner because the bottom surface of the cooking container C and the outer cap 28 are in direct contact with each other. Off switching operation is performed according to whether or not the high cut temperature of the temperature transmitted from the microcomputer C is exceeded. The switching operation of the bimetal device 10 is performed according to the following principle.

5A, when the conductive heat transmitted from the bottom surface of the cooking container C to the outer cap 28 does not exceed the high cut temperature, the movable contact 181 of the movable terminal 18 and the fixed terminal The fixed contacts 191 of the switch 19 maintain the ON state in contact with each other, and the MPU also maintains the open state, thereby continuing the gas supply.

  At this time, the bimetal disc 22 is kept convex upward, and the actuating pin 24 is disposed upwardly and spaced apart from the movable terminal 18.

When the conduction heat transmitted from the cooking container C exceeds the high cut temperature, the bimetal disc 22 is deformed as shown in FIG. 5B and is converted into a downwardly convexly curved state, Is moved downwardly by the bimetal disc 22 to push the movable terminal 18 downward.

When the movable terminal 18 is pushed down by the operation pin 24, the movable contact 181 and the fixed contact 191 are short-circuited to be switched off, thereby switching the MPU to the closed state, The supply is interrupted.

 When the temperature of the cooking container C becomes lower than the high cut temperature, the bimetal disk 22 is again deformed to be convex upward upward and the shape of the movable contact 181 is resiliently restored, The pressing state of the pin is released and the movable contact 181 and the fixed contact 191 are switched to the ON state in which they are in contact again.

The MPU which is once switched to the closed state maintains the closed state irrespective of the on switching operation of the bimetal device 10 and is switched to the open state to supply the gas only when the user operates the ignition valve.

According to the present invention, as described above, since the high cut temperature of the bimetal device 10 is determined by the radiation heat due to the fact that the cooking container C and the bimetal device 10 are separated from each other as described above, The bimetal device 10 directly measures the temperature of the cooking container C in direct contact with the cooking container C so that the accuracy of the bimetal device 10 is improved. .

According to the present invention, as described above, the terminal cylinder 16 and the operation pin 24 constituting the bimetal device 10 are made of a ceramic material having high heat resistance, and the movable terminal 18 and the fixed terminal 19 Is made of a brass (C2680R) material having good heat resistance and conductivity and the movable contact 181 and the fixed contact 191 are made of an Ag-alloy material, so that the electrical operation stability do.

That is, according to the present invention, even when the cooking container C is excessively heated due to evaporation of water or the like, the bimetal device 10 is damaged due to thermal deformation , There is little risk of a stable and continuous re-operation.

10: Bimetal device 12: Case
14: spring 16:
18: movable terminal 19: fixed terminal
20: Terminal cover 201:
22: Bimetal disc 24: Operation pin
26: inner cap 28: outer cap

Claims (7)

And a bimetal device provided in the gas range for detecting an overheated state, the system comprising:
The bimetal device is disposed at the center of the burner head and is configured to detect the heat of conduction of the cooking container being heated by being protruded through the through hole formed in the burner cover so as to be in contact with the bottom surface of the cooking container
Wherein the gas is heated by the heating means.
2. The bimetal device according to claim 1,
Cylindrical case
The buffer spring
The terminal springs supported by the buffer springs
And a movable terminal and a fixed terminal
A terminal cover provided on an upper surface of the terminal box,
A bimetal disk provided inside the top surface of the terminal cover,
A terminal cover which is vertically movable up and down through the terminal cover,
An inner cap provided on the terminal cover to cover the bimetal disc,
An outer cap disposed above the inner cap,
And an overheating prevention system for the gas range.
2. The bimetal device according to claim 1,
The terminal-passing operation pin is made of a ceramic material having high heat resistance
Wherein the gas is heated by the heating means.
2. The bimetal device according to claim 1,
The movable and fixed terminals
Made of brass (C2680R) material with good heat resistance and conductivity
Wherein the gas is heated by the heating means.
2. The bimetal device according to claim 1,
The movable terminal and the fixed terminal are respectively provided with a movable contact and a fixed contact which are detachably in contact with each other
Wherein the gas is heated by the heating means.
6. The method of claim 5,
Wherein the movable contact and the fixed contact are made of an Ag-alloy material
Wherein the gas is heated by the heating means.
The method according to claim 1,
The inner cap is made of an aluminum material and the outer cap is made of a stainless steel material
Wherein the gas is heated by the heating means.
KR1020160023149A 2016-02-26 2016-02-26 overheating prevent system of gas range KR101850283B1 (en)

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KR1020160023149A KR101850283B1 (en) 2016-02-26 2016-02-26 overheating prevent system of gas range

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KR1020160023149A KR101850283B1 (en) 2016-02-26 2016-02-26 overheating prevent system of gas range

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KR101850283B1 KR101850283B1 (en) 2018-05-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102022675B1 (en) * 2018-04-19 2019-09-18 최현용 Automatic gas pressure regulator with hot water temperature sensing function

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000260276A (en) * 1999-03-10 2000-09-22 Hitachi Hometec Ltd Overheat protection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102022675B1 (en) * 2018-04-19 2019-09-18 최현용 Automatic gas pressure regulator with hot water temperature sensing function

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KR101850283B1 (en) 2018-05-30

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X701 Decision to grant (after re-examination)