WO2024017619A1 - Gas cooktop and ignition device for cooktop - Google Patents

Gas cooktop and ignition device for cooktop Download PDF

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Publication number
WO2024017619A1
WO2024017619A1 PCT/EP2023/068349 EP2023068349W WO2024017619A1 WO 2024017619 A1 WO2024017619 A1 WO 2024017619A1 EP 2023068349 W EP2023068349 W EP 2023068349W WO 2024017619 A1 WO2024017619 A1 WO 2024017619A1
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WO
WIPO (PCT)
Prior art keywords
ignition
thermocouple
discharge terminal
burner
cooktop
Prior art date
Application number
PCT/EP2023/068349
Other languages
French (fr)
Inventor
Qiongqiong XI
Huihui HOU
Original Assignee
BSH Hausgeräte GmbH
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 BSH Hausgeräte GmbH filed Critical BSH Hausgeräte GmbH
Publication of WO2024017619A1 publication Critical patent/WO2024017619A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/008—Structurally associated with fluid-fuel burners
    • 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
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices

Definitions

  • This application relates to the field of gas cooktops, and in particular, to a gas cooktop and an ignition device for a gas cooktop.
  • the invention belongs to the technical field of gas cooktop devices and specifically relates to a gas cooktop, and includes a housing, a burner head, and an ignition module.
  • the burner head is arranged on the housing.
  • the ignition module includes a switch valve, a battery box, a pulser, and an ignition pin.
  • the battery box, the switch valve, and the ignition pin are all electrically connected to the pulser.
  • the ignition module is arranged on a lower end surface of the housing, and the ignition pin is arranged close to the burner head.
  • the ignition module in the cooktop is of modular design. When repairing the cooktop, a user only needs to remove the damaged ignition module from the housing for repair or replacement, without a need to disassemble the entire cooktop, so that the maintenance of the cooktop is more convenient.
  • An objective of embodiments of the invention is to provide an improved gas cooktop and an improved ignition device for a gas cooktop.
  • an aspect of the embodiments of the utility model relates to a cooktop, including a burner and an ignition pin and a thermocouple located near the burner.
  • the ignition pin has a discharge terminal.
  • the ignition terminal is configured to ignite gas emitted from the burner.
  • the thermocouple is used as a receiving terminal during discharging of the ignition pin. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner.
  • the discharge terminal of the ignition pin performs discharging toward the thermocouple, so that during ignition, a stable ignition circuit is formed among the ignition pin, the thermocouple, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner, which improves the ignition efficiency and achieves rapid ignition.
  • an ignition circuit is formed among the inner-ring fire cap, a fire cap base, a burner head, the ignition pin, and a valve body after the switch knob is pressed. Since many contacts exist in the ignition circuit, and the fire cap, the fire cap base, and the burner head are all connected movably, poor connection at a contact or use of a component with an insulating coating will bring a risk of non-conductivity to the discharge circuit, and even missing ignition may occur in the ignition circuit, which will result in an ignition failure. In the solution in the embodiments, few contacts exist in the ignition circuit, and different components are connected fixedly and stably, so that the ignition circuit is stable and reliable, and energy consumption is reduced, thereby improving the ignition efficiency and a success rate.
  • the burner includes an inner-ring fire cap and an outer-ring fire cap arranged around the inner-ring fire cap.
  • a distance from the discharge terminal to the thermocouple is less than a distance from the ignition terminal to the inner-ring fire cap. Therefore, when the discharge terminal of the ignition pin performs discharging, the thermocouple closer to the discharge terminal serves as the receiving terminal, and the discharge terminal performs discharging toward the thermocouple, so that electric sparks are generated between the discharge terminal and the thermocouple, thereby achieving rapid and stable ignition.
  • the ignition pin and the thermocouple are located between the inner-ring fire cap and the outer-ring fire cap.
  • a distance between the discharge terminal and the thermocouple is in a range of [2 mm, 5 mm].
  • the distance between the discharge terminal and the thermocouple is 4 mm. In this way, the discharge terminal achieves sufficient discharging, and the electric sparks and electric arcs are sufficient, which facilitates successful ignition.
  • the ignition pin includes an ignition electrode and an insulating housing wrapped around outside of the ignition electrode.
  • the ignition electrode includes the discharge terminal exposed from the housing. This helps prolong a life of the ignition pin.
  • the discharge terminal is inclined toward the thermocouple. This facilitates discharging of the discharge terminal toward the thermocouple, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
  • thermocouple is inclined toward the discharge terminal. This shortens the distance between the thermocouple and the discharge terminal, and facilitates discharging of the discharge terminal toward the thermocouple, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
  • the cooktop further includes a metal attachment sleeved on the thermocouple.
  • the metal attachment extends toward the discharge terminal of the ignition pin, and a distance between the metal attachment and the thermocouple is less than a distance between the ignition pin and the thermocouple. This facilitates discharging of the discharge terminal toward the thermocouple, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
  • the cooktop further includes a gas valve for gas control.
  • the thermocouple is connected to a casing of the gas valve, the thermocouple is grounded, and the thermocouple is used as a grounding terminal during the discharging of the ignition pin.
  • thermocouple is grounded by connecting to the casing of the gas valve.
  • an ignition device for a cooktop including a burner and an ignition pin and a thermocouple located near the burner.
  • the ignition pin has a discharge terminal.
  • the ignition terminal is configured to ignite gas emitted from the burner.
  • the thermocouple is used as a receiving terminal during discharging of the ignition pin. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner.
  • the discharge terminal of the ignition pin performs discharging toward the thermocouple, so that during ignition, a stable ignition circuit is formed among the ignition pin, the thermocouple, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner, which improves the ignition efficiency and achieves rapid ignition.
  • an ignition circuit is formed among the inner-ring fire cap, a fire cap base, a burner head, and the ignition pin after the switch knob is pressed. Since many contacts exist in the ignition circuit, and the fire cap, the fire cap base, and the burner head are all connected movably, poor connection at a contact or use of a component with an insulating coating will bring a risk of non-conductivity to the discharge circuit, and even missing ignition may occur in the ignition circuit, which will result in an ignition failure. In the solution in the embodiments, few contacts exist in the ignition circuit, and different components are connected fixedly and stably, so that the ignition circuit is stable and reliable, and energy consumption is reduced, thereby improving the ignition efficiency and a success rate.
  • the burner includes an inner-ring fire cap and an outer-ring fire cap arranged around the inner-ring fire cap. A distance from the discharge terminal to the thermocouple is less than a distance from the discharge terminal to the inner-ring fire cap.
  • FIG. l is a schematic diagram of a burner according to an embodiment of the utility model.
  • FIG. 2 is a partial perspective view of the burner before assembly according to an embodiment of the utility model.
  • FIG. 3 is a partial perspective view of the burner before assembly according to a second embodiment of the utility model.
  • FIG. 4 is a partial perspective view of the burner before assembly according to a third embodiment of the utility model.
  • FIG. 5 is a partial perspective view of the burner before assembly according to a fourth embodiment of the utility model.
  • Burner 1 Ignition pin 2 Thermocouple 3 Discharge terminal 4
  • Inner-ring fire cap 5 Outer-ring fire cap 6 Ignition electrode 7 Insulating housing 8
  • a cooktop includes a burner 1 and an ignition pin 2 and a thermocouple 3 located near the burner 1.
  • the ignition pin 2 has a discharge terminal 4.
  • the discharge terminal 4 is configured to ignite gas emitted from the burner 1.
  • thermocouple 3 is used as a receiving terminal during discharging of the ignition pin 2. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal 4 and the thermocouple 3 to ignite the gas emitted from the burner 1.
  • the discharge terminal 4 of the ignition pin 2 performs discharging toward the thermocouple 3, so that during ignition, a stable ignition circuit is formed among the ignition pin 2, the thermocouple 3, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal 4 and the thermocouple 3 to ignite the gas emitted from the burner 1, which improves the ignition efficiency and achieves rapid ignition.
  • an ignition circuit is formed among the inner-ring fire cap 5, a fire cap base, a burner head, the ignition pin 2, and a valve body after the switch knob is pressed. Since many contacts exist in the ignition circuit, and the fire cap, the fire cap base, and the burner head are all connected movably, poor connection at a contact or use of a component with an insulating coating will bring a risk of non-conductivity to the discharge circuit, and even missing ignition may occur in the ignition circuit, which will result in an ignition failure. In the solution in the embodiments, few contacts exist in the ignition circuit, and different components are connected fixedly and stably, so that the ignition circuit is stable and reliable, and energy consumption is reduced, thereby improving the ignition efficiency and a success rate.
  • the ignition pin 2 includes an ignition electrode 7 and an insulating housing 8 wrapped around outside of the ignition electrode 7.
  • the insulating housing 8 is made of a ceramic material. An end of the ignition electrode 7 is exposed from the housing.
  • the ignition electrode includes the discharge terminal 4 exposed from the housing, and the discharge terminal 4 is located at the end of the ignition electrode exposed from the housing.
  • the cooktop further includes a gas valve (not shown) configured to control gas.
  • the gas valve is configured to adjust a flow of gas supplied to the burner 1.
  • the thermocouple 3 is made of copper and other special metal materials.
  • the thermocouple 3 is fixedly connected to a casing of the gas valve.
  • the thermocouple 3 is grounded.
  • the thermocouple 3 is used as a grounding terminal during the discharging of the ignition pin 2, and is used as the receiving terminal during the ignition of the ignition pin 2.
  • thermocouple 3 is the receiving terminal, and the receiving terminal is grounded, so that a voltage difference is generated between discharge terminal 4 and the thermocouple 3.
  • continuous electric arcs are generated between the discharge terminal 4 and the thermocouple 3, thereby achieving rapid and stable ignition.
  • thermocouple 3 is further used for flameout protection for a cooktop. After a flame burns to the thermocouple 3, the thermocouple may generate an induced electromotive force as a signal for controlling opening of a gas source. When the flame extinguishes, the electromotive force rapidly decreases, and the gas source is closed. Before ignition, the thermocouple 3 is not burned by the flame, and the induced electromotive force is zero, and therefore may be used as a grounding structure for ignition.
  • the burner 1 includes an inner-ring fire cap 5 and an outer-ring fire cap 6 arranged around the inner-ring fire cap 5.
  • the ignition pin 2 and the thermocouple 3 are located between the inner-ring fire cap 5 and the outer-ring fire cap 6.
  • thermocouple 3 A distance from the discharge terminal 4 to the thermocouple 3 is less than a distance from the discharge terminal 4 to the inner-ring fire cap 5.
  • a distance between the discharge terminal 4 and the thermocouple 3 is in a range of [2 mm, 5 mm]. In a preferred embodiment, the distance between the discharge terminal 4 and the thermocouple is 4 mm.
  • the discharge terminal 4 is inclined toward the thermocouple 3.
  • the thermocouple 3 is inclined toward the discharge terminal 4. This not only shortens the distance between the thermocouple 3 and the discharge terminal 4, but also facilitates discharging of the discharge terminal 4 toward the thermocouple 3, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
  • the cooktop further includes a metal attachment 9 sleeved on the thermocouple.
  • the metal attachment 9 extends toward the discharge terminal 4 of the ignition pin 2, and a distance between the metal attachment 9 and the thermocouple 3 is less than a distance between the ignition pin 2 and the thermocouple 3. This not only further shortens the ignition distance, so that the spark energy is more concentrated, but also enables the discharge direction of the ignition pin 2 to be more stable, which helps achieve rapid ignition.
  • an ignition device for a cooktop including a burner 1 and an ignition pin 2 and a thermocouple located near the burner 1.
  • the ignition pin 2 has a discharge terminal 4, the ignition terminal is configured to ignite gas emitted from the burner 1, and the thermocouple 3 is used as a receiving terminal during discharging of the ignition pin 2.
  • electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple 3 to ignite the gas emitted from the burner 1.

Abstract

Embodiments of the present invention relate to a cooktop and an ignition device for a cooktop. The cooktop includes a burner and an ignition pin and a thermocouple located near the burner. The ignition pin has a discharge terminal. The ignition terminal is configured to ignite gas emitted from the burner. The thermocouple is used as a receiving terminal during discharging of the ignition pin. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner. The discharge terminal of the ignition pin performs discharging toward the thermocouple, so that during ignition, a stable ignition circuit is formed among the ignition pin, the thermocouple, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner, which improves the ignition efficiency and achieves rapid ignition.

Description

GAS COOKTOP AND IGNITION DEVICE FOR COOKTOP
TECHNICAL FIELD
This application relates to the field of gas cooktops, and in particular, to a gas cooktop and an ignition device for a gas cooktop.
BACKGROUND
The invention belongs to the technical field of gas cooktop devices and specifically relates to a gas cooktop, and includes a housing, a burner head, and an ignition module. The burner head is arranged on the housing. The ignition module includes a switch valve, a battery box, a pulser, and an ignition pin. The battery box, the switch valve, and the ignition pin are all electrically connected to the pulser. The ignition module is arranged on a lower end surface of the housing, and the ignition pin is arranged close to the burner head. The ignition module in the cooktop is of modular design. When repairing the cooktop, a user only needs to remove the damaged ignition module from the housing for repair or replacement, without a need to disassemble the entire cooktop, so that the maintenance of the cooktop is more convenient.
SUMMARY
An objective of embodiments of the invention is to provide an improved gas cooktop and an improved ignition device for a gas cooktop.
In order to achieve the above objective, an aspect of the embodiments of the utility model relates to a cooktop, including a burner and an ignition pin and a thermocouple located near the burner. The ignition pin has a discharge terminal. The ignition terminal is configured to ignite gas emitted from the burner. The thermocouple is used as a receiving terminal during discharging of the ignition pin. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner.
In the structure, the discharge terminal of the ignition pin performs discharging toward the thermocouple, so that during ignition, a stable ignition circuit is formed among the ignition pin, the thermocouple, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner, which improves the ignition efficiency and achieves rapid ignition.
If the ignition pin performs discharging toward the inner-ring fire cap, during ignition, an ignition circuit is formed among the inner-ring fire cap, a fire cap base, a burner head, the ignition pin, and a valve body after the switch knob is pressed. Since many contacts exist in the ignition circuit, and the fire cap, the fire cap base, and the burner head are all connected movably, poor connection at a contact or use of a component with an insulating coating will bring a risk of non-conductivity to the discharge circuit, and even missing ignition may occur in the ignition circuit, which will result in an ignition failure. In the solution in the embodiments, few contacts exist in the ignition circuit, and different components are connected fixedly and stably, so that the ignition circuit is stable and reliable, and energy consumption is reduced, thereby improving the ignition efficiency and a success rate.
In a possible embodiment, the burner includes an inner-ring fire cap and an outer-ring fire cap arranged around the inner-ring fire cap. A distance from the discharge terminal to the thermocouple is less than a distance from the ignition terminal to the inner-ring fire cap. Therefore, when the discharge terminal of the ignition pin performs discharging, the thermocouple closer to the discharge terminal serves as the receiving terminal, and the discharge terminal performs discharging toward the thermocouple, so that electric sparks are generated between the discharge terminal and the thermocouple, thereby achieving rapid and stable ignition.
In a possible embodiment, the ignition pin and the thermocouple are located between the inner-ring fire cap and the outer-ring fire cap.
In a possible embodiment, a distance between the discharge terminal and the thermocouple is in a range of [2 mm, 5 mm].
If an ignition distance is excessively large, the electric arcs between the discharge terminal and the thermocouple are likely to become unstable, the discharge direction of the discharge terminal is unlikely to always direct at the thermocouple, and the spark energy is not concentrated. As a result, it is difficult to achieve rapid ignition. When the distance between the discharge terminal and the thermocouple falls within the range of [2 mm, 5 mm], the electric arcs are stable, the discharge direction is fixed, and the spark energy is more concentrated, thereby achieving rapid ignition more easily.
In a possible embodiment, the distance between the discharge terminal and the thermocouple is 4 mm. In this way, the discharge terminal achieves sufficient discharging, and the electric sparks and electric arcs are sufficient, which facilitates successful ignition.
In a possible embodiment, the ignition pin includes an ignition electrode and an insulating housing wrapped around outside of the ignition electrode. The ignition electrode includes the discharge terminal exposed from the housing. This helps prolong a life of the ignition pin. In a possible embodiment, the discharge terminal is inclined toward the thermocouple. This facilitates discharging of the discharge terminal toward the thermocouple, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
In a possible embodiment, the thermocouple is inclined toward the discharge terminal. This shortens the distance between the thermocouple and the discharge terminal, and facilitates discharging of the discharge terminal toward the thermocouple, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
In a possible embodiment, the cooktop further includes a metal attachment sleeved on the thermocouple. The metal attachment extends toward the discharge terminal of the ignition pin, and a distance between the metal attachment and the thermocouple is less than a distance between the ignition pin and the thermocouple. This facilitates discharging of the discharge terminal toward the thermocouple, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
In a possible embodiment, the cooktop further includes a gas valve for gas control. The thermocouple is connected to a casing of the gas valve, the thermocouple is grounded, and the thermocouple is used as a grounding terminal during the discharging of the ignition pin.
Therefore, in order to achieve the discharging of the ignition pin, a voltage at the discharge terminal needs to be higher than a voltage at the receiving terminal, to create a voltage difference between the two terminals, thereby achieving discharge between the two terminals. The receiving terminal may be grounded. In this solution, the thermocouple is grounded by connecting to the casing of the gas valve.
Another aspect of the embodiments of the utility model relates to an ignition device for a cooktop, including a burner and an ignition pin and a thermocouple located near the burner. The ignition pin has a discharge terminal. The ignition terminal is configured to ignite gas emitted from the burner. The thermocouple is used as a receiving terminal during discharging of the ignition pin. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner.
In the structure, the discharge terminal of the ignition pin performs discharging toward the thermocouple, so that during ignition, a stable ignition circuit is formed among the ignition pin, the thermocouple, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple to ignite the gas emitted from the burner, which improves the ignition efficiency and achieves rapid ignition.
If the ignition pin performs discharging toward the inner-ring fire cap, during ignition, an ignition circuit is formed among the inner-ring fire cap, a fire cap base, a burner head, and the ignition pin after the switch knob is pressed. Since many contacts exist in the ignition circuit, and the fire cap, the fire cap base, and the burner head are all connected movably, poor connection at a contact or use of a component with an insulating coating will bring a risk of non-conductivity to the discharge circuit, and even missing ignition may occur in the ignition circuit, which will result in an ignition failure. In the solution in the embodiments, few contacts exist in the ignition circuit, and different components are connected fixedly and stably, so that the ignition circuit is stable and reliable, and energy consumption is reduced, thereby improving the ignition efficiency and a success rate.
In a possible embodiment, the burner includes an inner-ring fire cap and an outer-ring fire cap arranged around the inner-ring fire cap. A distance from the discharge terminal to the thermocouple is less than a distance from the discharge terminal to the inner-ring fire cap.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. l is a schematic diagram of a burner according to an embodiment of the utility model.
FIG. 2 is a partial perspective view of the burner before assembly according to an embodiment of the utility model.
FIG. 3 is a partial perspective view of the burner before assembly according to a second embodiment of the utility model.
FIG. 4 is a partial perspective view of the burner before assembly according to a third embodiment of the utility model.
FIG. 5 is a partial perspective view of the burner before assembly according to a fourth embodiment of the utility model.
Reference Numerals:
Burner 1 Ignition pin 2 Thermocouple 3 Discharge terminal 4
Inner-ring fire cap 5 Outer-ring fire cap 6 Ignition electrode 7 Insulating housing 8
Metal attachment 9
DETAILED DESCRIPTION
In order to enable a further understanding of the objective, the structure, the features, and the functions of this application, a detailed description is provided below by using embodiments. As shown in FIG. 1 and FIG. 2, a cooktop includes a burner 1 and an ignition pin 2 and a thermocouple 3 located near the burner 1. The ignition pin 2 has a discharge terminal 4. The discharge terminal 4 is configured to ignite gas emitted from the burner 1.
The thermocouple 3 is used as a receiving terminal during discharging of the ignition pin 2. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal 4 and the thermocouple 3 to ignite the gas emitted from the burner 1.
The discharge terminal 4 of the ignition pin 2 performs discharging toward the thermocouple 3, so that during ignition, a stable ignition circuit is formed among the ignition pin 2, the thermocouple 3, and a valve after a switch knob is pressed, and electric sparks or continuous electric arcs are generated between the discharge terminal 4 and the thermocouple 3 to ignite the gas emitted from the burner 1, which improves the ignition efficiency and achieves rapid ignition.
If the ignition pin 2 performs discharging toward an inner-ring fire cap 5, during ignition, an ignition circuit is formed among the inner-ring fire cap 5, a fire cap base, a burner head, the ignition pin 2, and a valve body after the switch knob is pressed. Since many contacts exist in the ignition circuit, and the fire cap, the fire cap base, and the burner head are all connected movably, poor connection at a contact or use of a component with an insulating coating will bring a risk of non-conductivity to the discharge circuit, and even missing ignition may occur in the ignition circuit, which will result in an ignition failure. In the solution in the embodiments, few contacts exist in the ignition circuit, and different components are connected fixedly and stably, so that the ignition circuit is stable and reliable, and energy consumption is reduced, thereby improving the ignition efficiency and a success rate.
The ignition pin 2 includes an ignition electrode 7 and an insulating housing 8 wrapped around outside of the ignition electrode 7. The insulating housing 8 is made of a ceramic material. An end of the ignition electrode 7 is exposed from the housing. The ignition electrode includes the discharge terminal 4 exposed from the housing, and the discharge terminal 4 is located at the end of the ignition electrode exposed from the housing.
The cooktop further includes a gas valve (not shown) configured to control gas. The gas valve is configured to adjust a flow of gas supplied to the burner 1.
The thermocouple 3 is made of copper and other special metal materials. The thermocouple 3 is fixedly connected to a casing of the gas valve. The thermocouple 3 is grounded. The thermocouple 3 is used as a grounding terminal during the discharging of the ignition pin 2, and is used as the receiving terminal during the ignition of the ignition pin 2.
In order to achieve the discharging of the ignition pin 2, a voltage at the discharge terminal 4 needs to be higher than a voltage at the receiving terminal, to create a voltage difference between the two terminals, thereby achieving discharge between the two terminals. In this embodiment, the thermocouple 3 is the receiving terminal, and the receiving terminal is grounded, so that a voltage difference is generated between discharge terminal 4 and the thermocouple 3. During the ignition of the ignition pin 2, continuous electric arcs are generated between the discharge terminal 4 and the thermocouple 3, thereby achieving rapid and stable ignition.
The thermocouple 3 is further used for flameout protection for a cooktop. After a flame burns to the thermocouple 3, the thermocouple may generate an induced electromotive force as a signal for controlling opening of a gas source. When the flame extinguishes, the electromotive force rapidly decreases, and the gas source is closed. Before ignition, the thermocouple 3 is not burned by the flame, and the induced electromotive force is zero, and therefore may be used as a grounding structure for ignition.
The burner 1 includes an inner-ring fire cap 5 and an outer-ring fire cap 6 arranged around the inner-ring fire cap 5. The ignition pin 2 and the thermocouple 3 are located between the inner-ring fire cap 5 and the outer-ring fire cap 6.
A distance from the discharge terminal 4 to the thermocouple 3 is less than a distance from the discharge terminal 4 to the inner-ring fire cap 5. When the discharge terminal 4 of the ignition pin 2 performs discharging, the thermocouple 3 closer to the discharge terminal 4 serves as the receiving terminal, and the discharge terminal 4 performs discharging toward the thermocouple 3, so that electric sparks are generated between the discharge terminal 4 and the thermocouple 3, thereby achieving rapid and stable ignition.
A distance between the discharge terminal 4 and the thermocouple 3 is in a range of [2 mm, 5 mm]. In a preferred embodiment, the distance between the discharge terminal 4 and the thermocouple is 4 mm.
If an ignition distance is excessively large, the electric arcs between the discharge terminal 4 and the thermocouple 3 are likely to become unstable, the discharge direction of the discharge terminal 4 is unlikely to always direct at the thermocouple 3, and the spark energy is not concentrated. As a result, it is difficult to achieve rapid ignition. When the distance between the discharge terminal 4 and the thermocouple 3 falls within the range of [2 mm, 5 mm], the electric arcs are stable, the discharge direction is fixed, and the spark energy is more concentrated, thereby achieving rapid ignition more easily.
In an embodiment, as shown in FIG. 4, the discharge terminal 4 is inclined toward the thermocouple 3. In an alternative embodiment, as shown in FIG. 5, the thermocouple 3 is inclined toward the discharge terminal 4. This not only shortens the distance between the thermocouple 3 and the discharge terminal 4, but also facilitates discharging of the discharge terminal 4 toward the thermocouple 3, so that the discharge direction is stable, and the spark energy is more concentrated, thereby facilitating quick ignition.
In another embodiment, as shown in FIG. 3, the cooktop further includes a metal attachment 9 sleeved on the thermocouple. The metal attachment 9 extends toward the discharge terminal 4 of the ignition pin 2, and a distance between the metal attachment 9 and the thermocouple 3 is less than a distance between the ignition pin 2 and the thermocouple 3. This not only further shortens the ignition distance, so that the spark energy is more concentrated, but also enables the discharge direction of the ignition pin 2 to be more stable, which helps achieve rapid ignition.
Another aspect of the utility model provides to an ignition device for a cooktop, including a burner 1 and an ignition pin 2 and a thermocouple located near the burner 1. The ignition pin 2 has a discharge terminal 4, the ignition terminal is configured to ignite gas emitted from the burner 1, and the thermocouple 3 is used as a receiving terminal during discharging of the ignition pin 2. During ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple 3 to ignite the gas emitted from the burner 1.
The various embodiments illustrated with reference to FIG. 1 to FIG. 5 may be combined with each other in any given manner to achieve the advantages of the utility model. In addition, the utility model is not limited to the embodiments that are shown. Generally, other means other than those shown may also be used, as long as these means can achieve the same effect.
This application has been described by using the above related embodiments, but the above embodiments are merely examples of implementing this application. It should be noted that the disclosed embodiments do not limit the scope of this application. On the contrary, changes and refinements made without departing from the spirit and scope of this application all fall within the protection scope of the claims of this application.

Claims

CLAIMS What is claimed is:
1. A cooktop, characterized by comprising a burner (1) and an ignition pin (2) and a thermocouple (3) located near the burner (1), wherein the ignition pin (2) has a discharge terminal (4), the discharge terminal (4) is configured to ignite gas emitted from the burner (1), the thermocouple (3) is used as a receiving terminal during discharging of the ignition pin (2), and during ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple (3) to ignite the gas emitted from the burner (1).
2. The cooktop according to claim 1, characterized in that the burner (1) comprises an inner-ring fire cap (5) and an outer-ring fire cap (6) arranged around the inner-ring fire cap (5), wherein a distance from the discharge terminal (4) to the thermocouple (3) is less than a distance from the discharge terminal (4) to the inner-ring fire cap (5).
3. The cooktop according to claim 2, characterized in that the ignition pin (2) and the thermocouple (3) are located between the inner-ring fire cap (5) and the outer-ring fire cap (6).
4. The cooktop according to claim 1, characterized in that a distance between the discharge terminal (4) and the thermocouple (3) is in a range of [2 mm, 5 mm],
5. The cooktop according to claim 4, characterized in that the distance between the discharge terminal (4) and the thermocouple is 4 mm.
6. The cooktop according to claim 1, characterized in that the ignition pin (2) comprises an ignition electrode (7) and an insulating housing (8) wrapped around outside of the ignition electrode (7), wherein the ignition electrode (7) comprises the discharge terminal (4) exposed from the housing.
7. The cooktop according to claim 1, characterized in that the discharge terminal (4) is inclined toward the thermocouple (3).
8. The cooktop according to claim 1, characterized in that the thermocouple (3) is inclined toward the discharge terminal (4).
9. The cooktop according to claim 1, characterized by further comprising a metal attachment (9) sleeved on the thermocouple (3), wherein the metal attachment (9) extends toward the discharge terminal (4) of the ignition pin (2), and a distance between the metal attachment (9) and the thermocouple (3) is less than a distance between the ignition pin (2) and the thermocouple (3).
10. The cooktop according to claim 1, characterized by further comprising a gas valve for gas control, wherein the thermocouple (3) is connected to a casing of the gas valve, the thermocouple (3) is grounded, and the thermocouple (3) is used as a grounding terminal during the discharging of the ignition pin (2).
11. An ignition device for a cooktop, characterized by comprising a burner (1) and an ignition pin (2) and a thermocouple located near the burner (1), wherein the ignition pin (2) has a discharge terminal (4), the ignition pin is configured to ignite gas emitted from the burner
(1), the thermocouple (3) is used as a receiving terminal during discharging of the ignition pin
(2), and during ignition, electric sparks or continuous electric arcs are generated between the discharge terminal and the thermocouple (3) to ignite the gas emitted from the burner (1).
12. The ignition device for a cooktop according to claim 11, characterized in that the burner (1) comprises an inner-ring fire cap (5) and an outer-ring fire cap (6) arranged around the inner-ring fire cap (5), wherein a distance from the discharge terminal (4) to the thermocouple (3) is less than a distance from the discharge terminal (4) to the inner-ring fire cap (5).
PCT/EP2023/068349 2022-07-19 2023-07-04 Gas cooktop and ignition device for cooktop WO2024017619A1 (en)

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Application Number Priority Date Filing Date Title
CN202221860285.2U CN219367699U (en) 2022-07-19 2022-07-19 Gas stove and ignition device thereof
CN202221860285.2 2022-07-19

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WO (1) WO2024017619A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1855404U (en) * 1956-04-19 1962-07-26 Burger Eisenwerke Ag IGNITION HEAD WITH THERMOCOUPLE ON GAS APPLIANCES.
US20100236538A1 (en) * 2007-07-17 2010-09-23 Aktiebolaget Electrolux Burner ignition system and method of ignition
CN203605284U (en) * 2013-10-23 2014-05-21 宁波方太厨具有限公司 Discharge structure of ignition needle of gas stove
CN104235890A (en) * 2013-06-13 2014-12-24 博西华电器（江苏）有限公司 Gas stove
WO2021058362A1 (en) * 2019-09-24 2021-04-01 BSH Hausgeräte GmbH Ignition device of gas cooktop and gas cooktop

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1855404U (en) * 1956-04-19 1962-07-26 Burger Eisenwerke Ag IGNITION HEAD WITH THERMOCOUPLE ON GAS APPLIANCES.
US20100236538A1 (en) * 2007-07-17 2010-09-23 Aktiebolaget Electrolux Burner ignition system and method of ignition
CN104235890A (en) * 2013-06-13 2014-12-24 博西华电器（江苏）有限公司 Gas stove
CN203605284U (en) * 2013-10-23 2014-05-21 宁波方太厨具有限公司 Discharge structure of ignition needle of gas stove
WO2021058362A1 (en) * 2019-09-24 2021-04-01 BSH Hausgeräte GmbH Ignition device of gas cooktop and gas cooktop

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