CN212644695U - Gas kitchen ranges - Google Patents

Abstract

The present disclosure relates to a gas range, including: the burner comprises an outer ring fire cover and an inner ring fire cover; a micro fire air cavity which is independently separated from the inner ring air cavity is formed in the inner ring fire cover, and a micro fire hole is formed in the side wall of the inner ring fire cover corresponding to the position of the micro fire air cavity; the gas transmission pipeline comprises: the outer annular air pipe and the outer jet orifice, the inner annular air pipe and the inner jet orifice, the tiny fire air pipe and the tiny jet orifice; the diameter of the micro jet orifice is smaller than that of the inner jet orifice; the control device includes: the device comprises a stop valve, an outer ring air valve, an inner ring air valve, a micro fire air valve and a flameout protection device; the flameout protection device is used for monitoring whether the flame of the tiny fire hole is extinguished. The technical scheme can reduce the gas consumption in unit time, is energy-saving and environment-friendly, also reduces the use cost of users, has great freedom degree for temperature adjustment, and is convenient for the users to operate and use.

Description

Gas kitchen ranges

Technical Field

The utility model relates to an intelligence kitchen utensils and appliances field especially relates to gas-cooker.

Background

When the minimum firepower is adjusted, the existing gas stove can close the outer ring fire and only keep the inner ring fire to burn. However, because the number of the inner ring fire holes is large and the volume of the air cavity in the inner fire cover is large, if the air quantity adjusted by the air valve is too low, the combustion is unstable, and the tempering phenomenon occurs, and in order to prevent the tempering, the air valve needs to be adjusted to a certain air quantity, so that the combustion power of the gas stove is about 400W when the minimum fire power is adjusted. Therefore, on one hand, when a user does not want to switch on and off fire frequently when holding dishes or brushing a pot and keeps the minimum firepower working state of the gas stove, the waste of gas is excessive, and the energy is not saved and the environment is protected; on the other hand, in some scenes (70-80 ℃) needing low-temperature cooking, the state of about 400W of the lowest power is difficult to realize, the operation is realized by continuously shutting off and firing the fire in the midway of the user, the intelligence is insufficient, and the use experience is poor.

Disclosure of Invention

The disclosed embodiment provides a gas stove. The technical scheme is as follows:

according to a first aspect of embodiments of the present disclosure, there is provided a gas range including: a cooking surface, a pot frame, a furnace end, a gas transmission pipeline, a control device and an ignition needle,

the furnace end includes: an outer ring fire cover and an inner ring fire cover; wherein, an outer ring air cavity is formed in the outer ring fire cover, and an outer ring fire hole is arranged on the side wall of the outer ring fire cover; an inner ring air cavity and a micro fire air cavity which is independently separated from the inner ring air cavity are formed in the inner ring fire cover, an inner ring fire hole is formed in the position, corresponding to the inner ring air cavity, of the side wall of the inner ring fire cover, and a micro fire hole is formed in the position, corresponding to the micro fire air cavity, of the side wall of the inner ring fire cover;

the gas transmission pipeline comprises: the outer annular air pipe and the outer jet orifice, the inner annular air pipe and the inner jet orifice, the tiny fire air pipe and the tiny jet orifice; the outer air pipe is used for outputting fuel gas of a main gas circuit to the outer jet orifice and jetting the fuel gas to the outer ring air cavity through the outer jet orifice; the inner ring air pipe is used for outputting fuel gas of a main gas circuit to the inner jet orifice and jetting the fuel gas to the inner ring air cavity through the inner jet orifice; the micro gas pipe is used for outputting the fuel gas of the main gas circuit to the micro jet orifice and jetting the fuel gas to the micro gas cavity through the micro jet orifice; the diameter of the micro jet orifice is smaller than that of the inner jet orifice;

the control device includes: the device comprises a stop valve, an outer ring air valve, an inner ring air valve, a micro fire air valve and a flameout protection device; the stop valve is arranged in the main gas path and used for controlling the on-off of gas in the main gas path; the outer annular air valve is arranged on the outer annular air pipe and used for controlling the gas flow of the outer annular air pipe; the inner annular air valve is arranged on the inner annular air pipe and used for controlling the gas flow of the inner annular air pipe; the micro gas valve is arranged on the micro gas pipe and used for controlling the gas flow of the micro gas pipe; the flameout protection device is located between the inner ring fire cover and the outer ring fire cover, is opposite to the small fire hole, is smaller than a preset threshold value in distance from the small fire hole, and is used for monitoring whether flames of the small fire hole are extinguished.

In one embodiment, the number of the micro fire holes ranges from 1 to 5.

In one embodiment, the diameter of the minute jet ports ranges from 0.1mm to 0.5 mm.

In one embodiment, the combustion power of the micro fire holes when the micro fire holes fire independently is less than or equal to 100W.

In one embodiment, the tiny fire air chambers are separated from the inner ring air chamber by isolation baffles.

In one embodiment, the control device further comprises:

and the controller is connected with the inner ring air valve, the outer ring air valve, the micro fire air valve and the stop valve and is used for controlling the firepower of the gas stove by controlling the inner ring air valve, the outer ring air valve, the micro fire air valve and the stop valve.

In one embodiment, the type of the inner ring air valve, the outer ring air valve, the micro fire air valve and the stop valve is any one of the following types: proportional valves, solenoid valves or plug valves.

In one embodiment, the misfire protection device comprises a thermocouple or an ion-sensitive pin.

In one embodiment, the gas range further comprises a temperature controller;

the temperature controller is located in the middle of the furnace end, is connected with the controller and is used for monitoring the pot bottom temperature of a pot on the gas stove and transmitting the pot bottom temperature to the controller, so that the controller controls the firepower of the gas stove according to the pot bottom temperature.

The gas stove provided by the embodiment is provided with the micro fire pipe, the micro jet orifice, the micro gas valve and the micro fire air cavity, so that micro fire which is smaller than the fire power of the inner ring fire is formed in the micro fire air cavity, the micro jet orifice is smaller than the inner jet orifice, when the single micro fire burns, the gas consumption in unit time is far lower than the gas flow when the single inner ring fire burns, and the combustion power of the gas stove is far lower than the combustion power when the single inner ring fire burns; therefore, for some users, when the users are used to dislike frequent switch ignition between continuous cooking, the users can adjust to separate micro fire for combustion when dishes are contained in the middle and the pots are washed, so that the consumption of gas in unit time can be reduced, the energy is saved, the environment is protected, and the use cost of the users is also reduced; in addition, in a scene (70-80 ℃) needing low-temperature cooking, even if the traditional gas stove is in a minimum fire state, the combustion power is as same as the original 400-500W, and when the temperature in the pot needs to be rapidly reduced, a user is required to take the pot away from a fire source due to long waiting time or the situation is not easy; for the gas stove structure of the embodiment, the gas stove only needs to be adjusted to be burnt by single tiny fire, so that the gas stove has great freedom degree for temperature adjustment and is convenient for a user to operate and use.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic view illustrating a structure of a gas range according to an exemplary embodiment.

FIG. 2 is a schematic diagram illustrating the construction of an inner ring fire cover according to an exemplary embodiment.

Fig. 3 is a schematic sectional view illustrating a partial structure of a gas range according to an exemplary embodiment.

Fig. 4 is a graph illustrating temperature and fire control during automatic cooking according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The embodiment provides a gas stove which comprises a stove surface, a pot frame, a stove head, a gas transmission pipeline, a control device and an ignition needle. At least one furnace end can be arranged on the cooking surface, a pot frame is arranged on each furnace end, and the pot frame is used for placing a cooking pot. The gas transmission pipeline can output gas to the furnace end and is ignited by the ignition needle, and the control device can control the burning fire to properly heat the cooking pot on the pot frame.

Fig. 1 is a schematic structural view illustrating a gas range according to an exemplary embodiment, and as shown in fig. 1, a burner of the gas range 1 includes: an outer ring fire cover 10 and an inner ring fire cover 20; wherein, an outer ring air cavity (not shown in the figure) is formed in the outer ring fire cover 10, and an outer ring fire hole 101 is arranged on the side wall of the outer ring fire cover 10. Fig. 2 is a schematic structural view illustrating an inner ring fire cover according to an exemplary embodiment, and as shown in fig. 2, the inner ring fire cover 20 includes an upper cover 200 and a side wall, an inner ring air chamber 201 is formed in the inner ring fire cover 20, and a minute fire air chamber 202 independently spaced from the inner ring air chamber 201, the minute fire air chamber 202 being smaller than the inner ring air chamber 201, the minute fire air chamber may be smaller than 1/2 of the inner ring air chamber, and the example minute fire chamber may be 1/10 of the inner ring air chamber. An inner ring fire hole 203 is formed in the side wall of the inner ring fire cover 20 at a position corresponding to the inner ring air cavity 201, and a micro fire hole 204 is formed in the side wall of the inner ring fire cover 20 at a position corresponding to the micro fire air cavity 202. The number of the micro fire holes 204 may be smaller than that of the inner ring fire holes 203.

As shown in fig. 1, the gas transmission pipeline includes: an outer air pipe 11 and an outer jet port (not shown), an inner air pipe 21 and an inner jet port (not shown), a minute air pipe 31 and a minute jet port (not shown); the outer annular gas pipe 11 is used for outputting gas of a main gas circuit to the outer jet orifice and jetting the gas to the outer annular gas cavity through the outer jet orifice; fig. 3 is a cross-sectional view of a gas range part structure according to an exemplary embodiment, as shown in fig. 3, the inner ring gas pipe 21 is used for outputting gas of a main gas path to the inner injection port, and the gas is injected to the inner ring gas cavity 201 from the inner injection port, and after the gas in the inner ring gas cavity 201 is ignited, fire will be emitted from the inner ring fire hole 203; the micro gas pipe 31 is used for outputting the gas in the main gas path to the micro jet orifice, and the gas is jetted to the micro gas chamber 202 through the micro jet orifice; after the gas in the tiny fire air cavity 202 is ignited, fire can be emitted from the tiny fire holes 204; the diameter of the minute ejection opening is smaller than that of the inner ejection opening.

As shown in fig. 1, the control device includes: a stop valve 40, an outer ring air valve 12, an inner ring air valve 22, a tiny fire air valve 32 and a flameout protection device 41; the stop valve 40 is arranged in the main gas path and used for controlling the on-off of the gas in the main gas path; the outer annular air valve 12 is arranged on the outer annular air pipe 11 and used for controlling the gas flow of the outer annular air pipe 11; the inner annular gas valve 22 is arranged on the inner annular gas pipe 21 and used for controlling the gas flow of the inner annular gas pipe 21; the micro gas valve 32 is arranged on the micro gas pipe 31 and used for controlling the gas flow of the micro gas pipe 31; the flameout protection device 41 is located between the inner ring fire cover 20 and the outer ring fire cover 10, is opposite to the tiny fire hole 204, and is located at a distance from the tiny fire hole 204 smaller than a preset threshold value, and is used for monitoring whether the flame of the tiny fire hole 204 is extinguished. Here, the flame extinction of the tiny fire hole 204 indicates that the flame of the entire gas stove is extinguished, and when the gas stove is extinguished by accident (for example, when boiling water overflows to extinguish the fire during cooking), the flameout protection device 41 can detect that the tiny fire is extinguished, and at this time, the gas stove can control the stop valve 40 to close, so that the gas stops flowing out, and the safety of the user is ensured.

Here, a mechanical knob or an operation key is disposed on a cooktop of the gas cooker, and a user may control the gas cooker to operate by operating the mechanical knob or the operation key. For example, the present embodiment may provide a method for using the gas stove, and the method for using the gas stove may include the following steps S11 to S14:

s11: a user starts up and ignites through a mechanical knob or an operation key to start the gas stove to start combustion; in the initial state, the default micro fire, the inner ring fire and the outer ring fire are synchronously opened and synchronously combusted.

In this step, the gas stove may open the stop valve 40 to let the gas in the main gas path flow out, and may open the outer ring gas valve 12, the inner ring gas valve 22, and the small fire gas valve 32 to let the gas flowing out from the main gas path be respectively injected from the outer injection port to the outer ring gas chamber via the outer ring gas pipe 11, from the inner injection port to the inner ring gas chamber 201 via the inner ring gas pipe 21, and from the small injection port to the small fire gas chamber 202 via the small fire gas pipe 31. Meanwhile, the ignition needle 43 (usually, the ignition needle is located at a position close to the inner ring fire hole) is controlled to ignite the gas in the inner ring air cavity 201, and further, the gas in the outer ring air cavity and the gas in the small fire cavity 202 are ignited, so that the flame is respectively ejected from the inner ring fire hole 203, the outer ring fire hole 101 and the small fire hole 204 to heat the cooking pot on the pot rack 44. It should be noted that, as shown in fig. 1, an ignition slot 102 may be disposed on the outer ring fire cover 10 of the gas range, and the gas in the outer ring gas cavity is ignited through the ignition slot 102.

S12: the user cooks the in-process and carries out the firepower according to culinary art actual state and adjusts, and the biggest firepower state is the state that little fire + interior ring fire + outer ring fire opened, and through mechanical knob or operation button changeable in proper order be interior ring fire + little fire, little fire state alone, little fire is the minimum firepower state of controllable alone, and gas-cooker combustion power reduces in proper order.

In this step, when the user adjusts the fire power of the gas stove to be the inner ring fire + the small fire, the gas stove can control the outer ring gas valve 12 to close, so that no gas exists in the outer ring gas cavity, and the outer ring fire is stopped; when the user adjusts the firepower of the gas stove to be single tiny fire, the gas stove can control the inner ring air valve 22 and the outer ring air valve 12 to be closed, so that no gas exists in the outer ring air cavity and the inner ring air cavity 201, and the inner ring fire and the outer ring fire are stopped. It should be noted here that the diameter of the minute injection port is smaller than that of the inner injection port, so that the amount of gas consumed per unit time is much lower than that of gas consumed in the combustion of the inner ring flame alone, and the combustion power of the minute flame alone is much lower than that of the inner ring flame alone.

S13: the user carries out the operation of holding vegetables or washing the pot during the period that the cooking of the next pot is not started after the cooking of the previous pot is finished, and manually sets the gas stove to a micro-fire combustion state, thereby reducing unnecessary energy consumption.

S14: and (5) finishing all cooking works, and performing shutdown operation by the user through a knob or an operation key.

In this step, the gas range can control the outer ring gas valve 12, the inner ring gas valve 22 and the small fire gas valve 32 to be closed, so that the outer ring fire, the inner ring fire and the small fire stop burning.

In the embodiment, when the single micro fire burns, the burning power of the micro fire is far lower than that of the single inner ring fire, and the gas quantity consumed in unit time is also far lower than that of the single inner ring fire; therefore, for some users, when the users are used to dislike frequent switch ignition between continuous cooking, the users can adjust to separate micro fire for combustion when dishes are contained in the middle and the pots are washed, so that the consumption of gas in unit time can be reduced, the energy is saved, the environment is protected, and the use cost of the users is also reduced; in addition, in a scene (70-80 ℃) needing low-temperature cooking, even if the traditional gas stove is in a minimum fire state, the combustion power is as same as the original 400-500W, and when the temperature in the pot needs to be rapidly reduced, a user is required to take the pot away from a fire source due to long waiting time or the situation is not easy; for the gas stove structure of the embodiment, the gas stove only needs to be adjusted to be burnt by single tiny fire, so that the gas stove has great freedom degree for temperature adjustment and is convenient for a user to operate and use.

In a possible embodiment, the number of the micro fire holes 204 ranges from 1 to 5.

Here, this little fire air cavity 202 is located inner ring air cavity 201, and is little than traditional inner ring air cavity 201, and the number of little fire hole 204 is 1 ~ 5, and like this, the airflow of little fire valve 32 can be lower, and the unstable tempering phenomenon that leads to of burning can not appear.

In one possible embodiment, the diameter range of the minute jet opening includes 0.1mm to 0.5 mm.

Here, the inner jet port of the gas range is generally about 1.0mm, and the diameter range of the minute jet port of the present embodiment includes 0.1mm to 0.5mm, which is smaller than the diameter of the inner jet port. The micro gas valve can control the gas flow sprayed out of the inner jet orifice by controlling the gas flow of the micro gas pipe, and further control the fire outlet size of the micro fire hole 204.

In one possible embodiment, the combustion power of the tiny fire holes 204 discharged separately is less than or equal to 100W.

Therefore, when the gas stove is burnt by single tiny fire, the burning power of the gas stove is less than 100W and is far lower than the minimum firepower state of the inner ring fire, and the gas stove has great freedom degree for temperature adjustment and is convenient for users to operate and use.

In one possible embodiment, as shown in fig. 2, the minute fire air chamber 202 is separated from the inner ring air chamber 201 by an isolation baffle 205. Thus, the minute fire air chamber 202 becomes an independent chamber independent from the inner ring air chamber 201.

In one possible embodiment, the control device further comprises: and a controller 45.

The controller 45 is connected to the inner ring air valve 22, the outer ring air valve 12, the small fire air valve 32 and the stop valve 40, and is configured to control the fire of the gas cooker by controlling the inner ring air valve 22, the outer ring air valve 12, the small fire air valve 32 and the stop valve 40.

Here, the controller 45 may receive an operation for a mechanical knob or an operation button on the cooktop, and when the operation is a firing operation, the controller 45 may open the inner ring gas valve 22, the outer ring gas valve 12, the minute fire gas valve 32, and the cut-off valve 40, and simultaneously activate the ignition needle to ignite the inner ring fire, the outer ring fire, and the minute fire. When the received operation is to reduce the fire power to the inner ring fire plus the small fire, the controller 45 may close the outer ring air valve 12 and close the outer ring fire; when the received operation is to reduce the fire to a small fire, the controller 45 may close the outer ring air valve 12 and the inner ring air valve 22, and close the outer ring fire and the inner ring fire; when the operation is a fire-off operation, the controller 45 may close the inner ring air valve 22, the outer ring air valve 12, the minute air valve 32, and the stop valve 40.

In a possible embodiment, the type of the inner ring air valve 22, the outer ring air valve 12, the micro fire valve 32 and the stop valve 40 is any one of the following: proportional valves, solenoid valves or plug valves.

Here, the valve port of the proportional valve, the solenoid valve or the plug valve may be opened by a corresponding opening degree according to a control command, thereby controlling the gas output quantity passing through the valve port per unit time.

In one possible embodiment, the quenching protection device 41 comprises a thermocouple or an ion-sensitive needle.

The thermocouple can adopt two kinds of different heat-sensitive metal to constitute, when small fire burning, the temperature that this thermocouple is close to the one end of small fire hole 204 is very high, the temperature of the other end is low, the temperature difference at both ends leads to forming the voltage difference at both ends, utilize this voltage difference to produce electric current and can maintain stop valve 40 and open, when small fire extinguishes, the temperature that this thermocouple is close to the one end of small fire hole 204 reduces, be less than when predetermineeing the temperature like 150 degrees, stop the power supply and make stop valve 40 fall back and close the gas passageway because of the difference in temperature reduces, in time stop the gas supply, the security improves.

The ion induction needle is protected against flame-out by means of the electric conductivity of fire. When the ion induction needle is burnt by fire, the ion induction needle is electrically conducted by fire, the ion induction needle is connected to the controller, and after the controller detects that the ion induction needle is electrically conducted, the stop valve is kept open, gas circulates, and the gas stove burns normally. When flame is accidentally extinguished, the ion induction needle on the gas stove is not conductive, and the controller cannot obtain a conductive signal and can automatically cut off the maintaining current to the stop valve to cause the stop valve to be closed, so that a gas channel is cut off, the gas supply is stopped in time, and the safety is improved.

In a possible embodiment, the gas burner further comprises a thermostat 46;

the temperature controller 46 is located in the middle of the burner, connected to the controller 45, and configured to monitor a pot bottom temperature of a pot on the gas cooker, and transmit the pot bottom temperature to the controller 45, so that the controller 45 controls the fire of the gas cooker according to the pot bottom temperature.

It should be noted that the thermostat 46 can be telescopically located in the middle of the stove head, the thermostat 46 can protrude out of the plane of the pot rack, and when a cookware is placed on the pot rack, the thermostat 46 moves downward under the pressure of the cookware, so that the thermostat 46 can be ensured to contact the bottom of the cookware, and the temperature of the bottom of the cookware can be monitored. The gas stove comprises a plurality of burner, and the temperature controller 46 can be arranged on at least one burner, as shown in fig. 1, the gas stove 1 comprises two burners, and the temperature controller 46 is arranged on only one burner.

For example, the present embodiment may provide a method for using the gas stove, and the method for using the gas stove may include the following steps S21 to S24:

s21: a user starts up and ignites through a mechanical knob or an operation key to start the gas stove to start combustion; in the initial state, the default micro fire, the inner ring fire and the outer ring fire are synchronously opened and synchronously combusted.

The specific control process may refer to the description in step S11.

S22: and the user selects a locally preset cooking menu through the gas stove operation interface or selects the menu through an external intelligent terminal and sends the menu to the gas stove locally for cooking.

The step S21 and the step S22 have no sequence, and the step S21 may be performed first, and then the step S22 is performed to issue the menu; the step S22 may be performed first to issue the recipe, and the step S21 may be performed to ignite, which is not limited herein.

S23: the gas stove automatically cooks according to a preset cooking menu selected by a user, relevant cooking parameters such as temperature, firepower and time are set in the preset menu, and when the temperature of the pot bottom detected by the temperature controller 46 is lower than the preset value, the controller 45 can gradually increase the combustion power in a mode of gradually opening the inner ring fire and opening the outer ring fire; when the temperature of the bottom of the pan detected by the temperature controller 46 is higher than a preset value, the controller 45 may gradually decrease the combustion power by gradually turning off the outer ring fire and the inner ring fire in sequence.

When the temperature of the pot bottom needs to be rapidly reduced, the controller 45 can control the outer ring fire and the inner ring fire to be turned off, and the single small fire burns, so that the burning power is lower than 100W and is far lower than the minimum firepower state of the inner ring fire, the temperature in the pot does not need to be reduced by turning off the fire, the degree of freedom is high for temperature adjustment, and the pot bottom is convenient for a user to operate and use.

For example, fig. 4 is a graph illustrating temperature and power control during automatic cooking according to an exemplary embodiment. As shown in fig. 4, the temperature control curve and the fire control curve, the automatic cooking includes five stages, in the first stage, when the gas range is initially fired, the minute fire, the inner ring fire and the outer ring fire are simultaneously burned, the fire is P1 at the maximum, the temperature is rapidly increased, and when the temperature is increased to T1, the second stage is entered; the second stage is a heat preservation stage, the controller can control the outer ring fire to be closed firstly, the inner ring fire and the tiny fire are reserved, the firepower is kept at P2, and the temperature is kept at about T1; after the second stage is carried out for the first preset time, the third stage is carried out, the controller can control the inner ring fire to be turned off in the third stage, only the tiny fire is reserved, the firepower is kept at P3, and the temperature is kept at about T1; after the third stage is kept warm for the second preset time, the fourth stage is entered, in the fourth stage, the controller can turn on the inner ring fire, the firepower is kept at P4, the fifth stage is entered when the temperature rise is detected to be slow, in the fifth stage, the controller can further adjust the firepower to P5 to enable the temperature to rise, the controller can turn on the outer ring fire, the firepower is kept at P5, the cooking is completed after the temperature rises to T3, and the temperature drops.

S24: and (5) finishing cooking, and performing shutdown operation by the user through a knob or an operation key.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (9)

1. A gas stove comprises a stove surface, a pot frame, a stove head, a gas transmission pipeline, a control device and an ignition needle, and is characterized in that,

the furnace end includes: an outer ring fire cover and an inner ring fire cover; wherein, an outer ring air cavity is formed in the outer ring fire cover, and an outer ring fire hole is arranged on the side wall of the outer ring fire cover; an inner ring air cavity and a micro air cavity which is independently separated from the inner ring air cavity are formed in the inner ring fire cover, and the micro air cavity is smaller than the inner ring air cavity; an inner ring fire hole is formed in the side wall of the inner ring fire cover corresponding to the inner ring air cavity, and a micro fire hole is formed in the side wall of the inner ring fire cover corresponding to the micro fire air cavity;

the gas transmission pipeline comprises: the outer annular air pipe and the outer jet orifice, the inner annular air pipe and the inner jet orifice, the tiny fire air pipe and the tiny jet orifice; the outer air pipe is used for outputting fuel gas of a main gas circuit to the outer jet orifice and jetting the fuel gas to the outer ring air cavity through the outer jet orifice; the inner ring air pipe is used for outputting fuel gas of a main gas circuit to the inner jet orifice and jetting the fuel gas to the inner ring air cavity through the inner jet orifice; the micro gas pipe is used for outputting the fuel gas of the main gas circuit to the micro jet orifice and jetting the fuel gas to the micro gas cavity through the micro jet orifice; the diameter of the micro jet orifice is smaller than that of the inner jet orifice;

the control device includes: the device comprises a stop valve, an outer ring air valve, an inner ring air valve, a micro fire air valve and a flameout protection device; the stop valve is arranged in the main gas path and used for controlling the on-off of gas in the main gas path; the outer annular air valve is arranged on the outer annular air pipe and used for controlling the gas flow of the outer annular air pipe; the inner annular air valve is arranged on the inner annular air pipe and used for controlling the gas flow of the inner annular air pipe; the micro gas valve is arranged on the micro gas pipe and used for controlling the gas flow of the micro gas pipe; the flameout protection device is located between the inner ring fire cover and the outer ring fire cover, is opposite to the small fire hole, is smaller than a preset threshold value in distance from the small fire hole, and is used for monitoring whether flames of the small fire hole are extinguished.

2. The gas stove as claimed in claim 1, wherein the number of the minute fire holes ranges from 1 to 5.

3. The gas range of claim 1, wherein the diameter of the minute injection port ranges from 0.1mm to 0.5 mm.

4. The gas range of claim 1, wherein the combustion power of the minute fire holes when fired alone is 100W or less.

5. The gas range of claim 1, wherein the minute fire air chamber is separated from the inner ring air chamber by an isolation baffle.

6. The gas range of claim 1, wherein the control means further comprises:

and the controller is connected with the inner ring air valve, the outer ring air valve, the micro fire air valve and the stop valve and is used for controlling the firepower of the gas stove by controlling the inner ring air valve, the outer ring air valve, the micro fire air valve and the stop valve.

7. The gas range of claim 1, wherein the type of the inner ring gas valve, the outer ring gas valve, the minute fire gas valve, and the shutoff valve is any one of: proportional valves, solenoid valves or plug valves.

8. The gas range of claim 1, wherein the flame-out protection device comprises a thermocouple or an ion-sensitive needle.

9. The gas range of claim 6, further comprising a temperature controller;

the temperature controller is located in the middle of the furnace end, is connected with the controller and is used for monitoring the pot bottom temperature of a pot on the gas stove and transmitting the pot bottom temperature to the controller, so that the controller controls the firepower of the gas stove according to the pot bottom temperature.

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