CN113864828A

CN113864828A - Gas stove and control method thereof

Info

Publication number: CN113864828A
Application number: CN202111101415.4A
Authority: CN
Inventors: 王运发; 王光汉; 周文通; 段聪聪; 刘梦茹; 刘书兴
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2021-12-31

Abstract

The application relates to a gas stove and a control method thereof. This gas-cooker includes: the stove comprises a stove body, a burner, a first temperature sensor, a second temperature sensor, a control valve and a controller. The burner comprises a burner head and a fire cover arranged on the burner head, the burner head is arranged on the stove body and is provided with a mixing cavity communicated with the fire cover, and the control valve is connected with the burner head and an air source and is controlled to respectively switch on or switch off the mixing cavity and the air source when being opened or closed. The first temperature sensor is used for sensing the temperature at the fire cover, and the second temperature sensor is used for sensing the temperature of the mixing cavity. The controller is in communication connection with the control valve, the first temperature sensor and the second temperature sensor. The controller is used for controlling the temperature of the second temperature sensor to sense the temperature of the mixing cavity when the normal combustion of flame at the fire cover is determined according to the sensing value of the first temperature sensor. And the control valve is controlled to be closed when the existence of the backfire in the mixing cavity is determined according to the sensing value of the second temperature sensor. The application can avoid the safety problem caused by tempering.

Description

Gas stove and control method thereof

Technical Field

The application relates to the technical field of gas stoves, in particular to a gas stove and a control method thereof.

Background

Accidents caused by abnormal combustion of the gas stove occur, for example, when the gas stove is tempered, if the gas source cannot be cut off in time, the gas stove will be burnt or damaged, if the tempering time is too long, fire accidents can also occur, and the life safety of users is seriously threatened. However, almost all gas cooker products on the market have no backfire safety protection function.

Disclosure of Invention

The application aims at solving the problem that potential safety hazards are caused by tempering in the existing gas stove, and provides the gas stove and the control method thereof.

A gas stove comprises a stove body, a burner, a first temperature sensor, a second temperature sensor, a control valve and a controller; the burner comprises a burner head and a fire cover arranged on the burner head, the burner head is arranged on the stove body and is provided with a mixing cavity communicated with the fire cover, and the control valve is connected with the burner head and an air source and is controlled to respectively switch on or switch off the mixing cavity and the air source when being opened or closed; the first temperature sensor is used for sensing the temperature at the fire cover, and the second temperature sensor is used for sensing the temperature of the mixing cavity; the controller is in communication connection with the control valve, the first temperature sensor and the second temperature sensor;

the controller is used for controlling the second temperature sensor to sense the temperature of the mixing cavity when the normal combustion of the flame at the fire cover is determined according to the sensing value of the first temperature sensor; the controller is also used for controlling the control valve to be closed when the back fire in the mixing cavity is determined according to the sensing value of the second temperature sensor.

In one embodiment, the controller is further used for controlling the control valve to close when the abnormal combustion of the flame at the fire cover is determined according to the sensing value of the first temperature sensor.

In one embodiment, the controller is configured to determine that the flame at the fire cover is normally combusted when the sensing values of the first temperature sensor acquired within a preset time period are within a first temperature range.

In one embodiment, the controller is further configured to control the control valve to close when the sensed value of the second temperature sensor is in a second temperature interval; when the induction value of the second temperature sensor is in a third temperature range, controlling the control valve to be opened; the temperature value of the second temperature interval is greater than the temperature value of the third temperature interval.

In one embodiment, the second temperature sensor is located within the mixing chamber.

In one embodiment, the fire cover comprises an outer ring fire cover and a central fire cover which are arranged on the furnace end, the outer ring fire cover is arranged around the central fire cover, the mixing cavity is communicated with the outer ring fire cover and the central fire cover, and the first temperature sensor is arranged between the outer ring fire cover and the central fire cover.

A control method of a gas stove comprises the following steps:

acquiring an induction value of a first temperature sensor for sensing the temperature at the fire cover;

determining whether the flame at the fire cover is normally combusted according to the induction value of the first temperature sensor;

if so, controlling the second temperature sensor to sense the temperature in the mixing cavity in the furnace end;

judging whether tempering exists in the mixing cavity or not according to the induction value of the second temperature inductor;

if yes, the control valve is controlled to be closed.

In one embodiment, after the step of determining whether the flame at the fire cover is normally combusted according to the sensing value of the first temperature sensor, the method further comprises the following steps:

if not, the control valve is controlled to be closed.

In one embodiment, the step of determining whether the flame at the fire cover is normally burnt according to the sensing value of the first temperature sensor comprises the following steps:

judging whether the induction values of the first temperature inductor acquired within a preset time are all in a first temperature range;

if so, determining that the flame at the fire cover is normally combusted;

if not, determining that the flame at the fire cover is abnormally combusted.

In one embodiment, the step of determining whether a back fire exists in the mixing chamber according to the sensing value of the second temperature sensor includes:

when the induction value of the second temperature sensor is in a second temperature range, judging that tempering exists in the mixing cavity;

and when the induction value of the second temperature sensor is in a third temperature range, judging that tempering exists in the mixing cavity, wherein the temperature value in the second temperature range is greater than that in the third temperature range.

According to the gas stove, the second temperature sensor is used for sensing the temperature in the mixing cavity to determine whether tempering exists in the mixing cavity, the control valve is closed when the tempering exists in the mixing cavity, the gas is cut off in time, the tempering is avoided, and further potential safety hazards caused by the tempering and the damage problem of the gas stove are avoided. Simultaneously, combine together second temperature-sensing ware and first temperature-sensing ware, only when first temperature-sensing ware detects the flame normal combustion of fire lid department, the temperature in the mixing chamber still can be responded to the second temperature-sensing ware, and the data that reducible control part handled reduce the processing cost of control part.

Drawings

Fig. 1 is a schematic structural view of a gas range according to an embodiment of the present application;

fig. 2 is a schematic view illustrating an internal structure of the gas range shown in fig. 1;

fig. 3 is a sectional view of the gas range shown in fig. 1;

FIG. 4 is a logic control diagram of a gas burner according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a control method of a gas range according to an embodiment of the present application.

Description of reference numerals:

100. a gas range; 110. a stove body; 111. a bottom case; 112. a panel; 120. a burner; 121. a furnace end; 122. a fire cover; 1221. an outer ring fire cover; 1222. a central fire cover; 130. a first temperature sensor;

140. a second temperature sensor; 150. a control valve; 160. a controller; 170. an air tube; 180. an ignition needle; 190. a control panel.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and 2, in an embodiment of the present invention, a gas range 100 is provided, which includes a range body 110, a burner 120, a first temperature sensor 130, a second temperature sensor 140, a control valve 150, and a controller 160. The burner 120 comprises a burner 121 and a fire cover 122 arranged on the burner 121, the burner 121 is arranged on the stove body 110 and has a mixing chamber communicated with the fire cover 122, and the control valve 150 is connected with the burner 121 and the gas source and is controlled to respectively turn on or off the mixing chamber and the gas source when being opened or closed. The first temperature sensor 130 is used to sense the temperature at the fire lid 122, and the second temperature sensor 140 is used to sense the temperature of the mixing chamber. The controller 160 is communicatively coupled to the control valve 150, the first temperature sensor 130, and the second temperature sensor 140. Wherein, the controller 160 is used for controlling the second temperature sensor 140 to sense the temperature of the mixing chamber when it is determined that the flame at the fire cover 122 is normally burned according to the sensing value of the first temperature sensor 130. And also for controlling the control valve 150 to be closed when it is determined that a flashback exists in the mixing chamber based on the sensed value of the second temperature sensor 140.

In the gas stove 100, when a user performs an ignition operation, the control valve 150 is opened, and the gas from the gas source reaches the fire cover 122 through the mixing chamber and flows out through the fire cover 122. Meanwhile, the ignition needle 180 at the fire cover 122 releases high voltage pulses to ignite the gas flowing out through the fire cover 122, forming flames. The first temperature sensor 130 senses the temperature of the flame. The controller 160 determines whether the flame at the fire cover 122 is normally burned according to the sensing value of the first temperature sensor 130. The controller 160 controls the second temperature sensor 140 to sense the temperature of the mixing chamber when it is determined that the flame at the fire cover 122 is normally burned. The controller 160 determines whether or not a back fire exists in the mixing chamber according to the sensing value of the second temperature sensor 140 after acquiring the sensing value of the second temperature sensor 140. When it is determined that a flashback exists in the mixing chamber, the controller 160 controls the control valve 150 to close to switch the gas supply and the flame at the flame cap 122 to extinguish.

Compared with the prior art, the second temperature sensor 140 is used for sensing the temperature in the mixing cavity to determine whether tempering exists in the mixing cavity, the control valve 150 is closed when the tempering exists in the mixing cavity, the fuel gas is cut off in time, the tempering is avoided, and the potential safety hazard and the damage problem of the gas stove 100 caused by the tempering are further avoided. Meanwhile, the second temperature sensor 140 is combined with the first temperature sensor 130, and only when the first temperature sensor 130 detects that the flame at the fire cover 122 is normally combusted, the second temperature sensor 140 can sense the temperature in the mixing cavity, so that the data processed by the control part can be reduced, and the processing cost of the control part can be reduced.

The first temperature sensor 130 and the second temperature sensor 140 may be, but not limited to, a bimetal thermometer, a glass liquid thermometer, a pressure thermometer, a resistance thermometer, a thermistor, a thermocouple, and the like. The control valve 150 may be a solenoid valve.

In specific embodiments, the controller 160 is further configured to control the control valve 150 to close when it is determined that the flame at the fire cover 122 is abnormally combusted according to the sensing value of the first temperature sensor.

In actual operation, after the user ignites, the flame at the fire cover 122 is extinguished, or the gas is intermittently combusted due to insufficient gas supply, or the flame is extinguished due to external force, or the flame cannot be smoothly ignited due to insufficient electric quantity of the pulse igniter, and thus insufficient flame temperature, unstable flame, or extinguished flame may occur. At this time, the value of the sensing value of the first temperature sensor is unstable or the sensing value is very small and does not meet the setting requirement, and the controller 160 determines that the flame at the fire cover 122 is abnormally combusted.

In this embodiment, when the flame is abnormally combusted, the control valve 150 is controlled to close, so as to avoid safety problems caused by the abnormal combustion of the flame (such as carbon monoxide poisoning caused by the release of unburned gas into the environment).

When the control valve 150 is closed, it is naturally not necessary that the second temperature sensor 140 continuously senses the temperature in the mixing chamber since flame cannot be generated. After the control valve 150 is closed, the user needs to perform the ignition operation again to ignite.

In a specific further embodiment, the controller 160 is configured to determine that the flame at the fire cover 122 is normally combusted when the sensed values of the first temperature sensor 130 obtained within the preset time are all within the first temperature range.

In actual operation, after the user performs the ignition operation, the controller 160 obtains a plurality of sensing values of the first temperature sensor 130 for a continuous period of time. When the obtained plurality of sensed values are all in the first temperature range, it indicates that the first temperature sensor 130 continuously senses the temperature of the flame, that is, the flame is normally burned. Meanwhile, it can be understood that when one or more of the sensed values is not in the first temperature range (which is generally smaller than the temperature value in the first temperature range), it indicates that the flame is unstable or the flame is extinguished, that is, the flame is abnormally combusted.

Wherein the first temperature interval may be 1000 ℃ to 1300 ℃. Of course, other interval values are possible.

Of course, in other embodiments, the controller 160 may determine whether the flame is burning properly based on other rules. For example, when the temperature values obtained within a period of time are all higher than the high-temperature threshold value, it is determined that the flame is normally combusted, otherwise, the flame is not normally combusted.

In a specific further embodiment, the controller 160 is further configured to control the control valve 150 to close when the sensed value of the second temperature sensor 140 is in the second temperature range. And controls the control valve 150 to open when the sensed value of the second temperature sensing is in the third temperature interval. The temperature value of the second temperature interval is greater than that of the third temperature interval.

In this embodiment, the temperature in the mixing chamber increases dramatically when a flashback exists in the mixing chamber. At this time, the value of the sensing value of the second temperature sensor 140 is larger and is within the second temperature range. When no backfire exists in the mixing cavity, the temperature in the mixing cavity is increased mainly due to the heat radiation of flame at the fire cover 122, and at the moment, the temperature in the mixing cavity is lower and is positioned in a third temperature interval. When the controller 160 detects that the value sensed by the second temperature sensor 140 is in the second temperature range, which indicates that a flashback exists in the mixing chamber, the control valve 150 is controlled to close. When the controller 160 detects that the value sensed by the second temperature sensor 140 is in the third temperature range, which indicates that there is no flashback in the mixing chamber, the control valve 150 is maintained in the open state.

Wherein, the second temperature interval can be 1000 ℃ to 1300 ℃, and can also be other interval values. The third temperature interval may be 50 ℃ to 150 ℃, although other values may be used.

Of course, in other embodiments, the controller 160 may determine whether flashback exists in the mixing chamber based on other rules. For example, when the sensing value of the second temperature sensor 140 is greater than the high temperature threshold, it is determined that the back fire exists in the mixing chamber, otherwise, the back fire does not exist in the mixing chamber.

In some embodiments, referring to fig. 3, the second temperature sensor 140 is located in the mixing chamber. At this moment, the mixing chamber that is located second temperature-sensing ware 140 can play the vortex effect to the gas in the mixing chamber for the gas mixing in the mixing chamber is more abundant, improves the combustion efficiency of gas.

Of course, in other embodiments, the second temperature sensor 140 may be disposed outside the mixing chamber. For example, by attaching to the outer wall of the mixing chamber, the temperature in the mixing chamber is sensed by heat conduction.

It will be appreciated that the mixing chamber has a primary air inlet communicating with the outside and a gas inlet communicating with the control valve 150, and that the primary air and gas mix within the mixing chamber before entering the fire lid 122.

In some embodiments, referring to fig. 1 to 3, the gas range 100 further includes a gas pipe 170 for communicating gas, and the control valve 150 is used to connect the mixing chamber through the gas pipe 170. Further, the fire cover 122 includes an outer ring fire cover 1221 and a center fire cover 1222 installed on the burner 121, the outer ring fire cover 1221 is installed around the center fire cover 1222, the mixing chamber is communicated with both the outer ring fire cover 1221 and the center fire cover 1222, and the first temperature sensor 130 is installed between the outer ring fire cover 1221 and the center fire cover 1222. At this time, the first temperature sensor 130 is disposed near the center of the fire cover 122, and the sensed temperature is more accurate and stable. Further, the gas range 100 further includes an ignition needle 180, and the ignition needle 180 is disposed between the outer ring fire cover 1221 and the central fire cover 1222, and is used for igniting the gas flowing out through the outer ring fire cover 1221 and the inner ring fire cover 122. When a user performs an ignition operation, the ignition needle 180 discharges a high voltage pulse to ignite gas.

The specific components of the outer fire cover 1221, the central fire cover 1222, the burner 121, and the ignition needle 180 are not limited in the embodiments of the present application, and may be in the existing configuration.

Furthermore, the range body 110 includes a bottom case 111 and a panel 112, the bottom case 111 has an inner cavity with an opening at one side, the panel 112 covers the opening, the panel 112 has a cooking range, the fire cover 122 is disposed at the cooking range, and the burner 121, the controller 160, and the control valve 150 are all located in the inner cavity. In addition, the gas range 100 further includes a control panel 190, the control panel 190 is disposed on the panel 112, the control panel 190 is electrically connected to the controller 160, and the control panel 190 is configured to respond to a control command triggered by a user through the control panel 190. In operation, a user activates a control command when acting on an ignition button on the control panel 190, and the controller 160 controls the ignition needle 180 to discharge and opens the control valve 150 for gas supply in response to the control command.

Please refer to fig. 4, which is a diagram illustrating a logic control diagram of the gas stove 100 according to an embodiment of the present application, and a detailed process thereof is omitted.

In the gas stove 100, the second temperature sensor 140 senses the temperature in the mixing chamber to determine whether a back fire exists in the mixing chamber, and the control valve 150 is closed when the back fire exists in the mixing chamber, and the gas is cut off in time, so that the back fire is avoided, and the potential safety hazard caused by the back fire and the damage problem of the gas stove 100 are avoided. Meanwhile, the second temperature sensor 140 is combined with the first temperature sensor 130, and only when the first temperature sensor 130 detects that the flame at the fire cover 122 is normally combusted, the second temperature sensor 140 can sense the temperature in the mixing cavity, so that the data processed by the control part can be reduced, and the processing cost of the control part can be reduced.

Based on the same inventive concept, please refer to fig. 5, an embodiment of the present application further provides a control method of a gas stove, including the following steps:

s1, acquiring a sensing value of the first temperature sensor 130 for sensing the temperature at the fire cover 122;

s2, determining whether the flame at the fire cover 122 burns normally according to the sensing value of the first temperature sensor 130;

s3, if yes, controlling the second temperature sensor 140 to sense the temperature in the mixing cavity of the burner 121;

s4, judging whether tempering exists in the mixing cavity or not according to the induction value of the second temperature inductor 140;

s5, if yes, control valve 150 is closed.

The gas range 100 in this embodiment includes a range body 110, a burner 120, a first temperature sensor 130, a second temperature sensor 140, a control valve 150, and a controller 160. The burner 120 comprises a burner 121 and a fire cover 122 arranged on the burner 121, the burner 121 is arranged on the stove body 110 and has a mixing chamber communicated with the fire cover 122, and the control valve 150 is connected with the burner 121 and the gas source and is controlled to respectively turn on or off the mixing chamber and the gas source when being opened or closed. The first temperature sensor 130 is used to sense the temperature at the fire lid 122, and the second temperature sensor 140 is used to sense the temperature of the mixing chamber. The controller 160 is communicatively coupled to the control valve 150, the first temperature sensor 130, and the second temperature sensor 140. Wherein the controller 160 performs the steps of the above-mentioned control method for controlling the second temperature sensor 140 to sense the temperature of the mixing chamber when it is determined that the flame at the fire cover 122 is normally burned based on the sensed value of the first temperature sensor 130. And also for controlling the control valve 150 to be closed when it is determined that a flashback exists in the mixing chamber based on the sensed value of the second temperature sensor 140.

In actual operation, when the user performs the ignition operation, the control valve 150 is opened, and the gas from the gas source reaches the fire cover 122 through the mixing chamber and flows out through the fire cover 122. Meanwhile, the ignition needle 180 at the fire cover 122 releases high voltage pulses to ignite the gas flowing out through the fire cover 122, forming flames. The first temperature sensor 130 senses the temperature of the flame. The controller 160 determines whether the flame at the fire cover 122 is normally burned according to the sensing value of the first temperature sensor 130. The controller 160 controls the second temperature sensor 140 to sense the temperature of the mixing chamber when it is determined that the flame at the fire cover 122 is normally burned. The controller 160 determines whether or not a back fire exists in the mixing chamber according to the sensing value of the second temperature sensor 140 after acquiring the sensing value of the second temperature sensor 140. When it is determined that a flashback exists in the mixing chamber, the controller 160 controls the control valve 150 to close to switch the gas supply and the flame at the flame cap 122 to extinguish.

After the step S4, the method further includes a step S6: if not, the control valve 150 is maintained open. That is, when the backfire does not occur, the gas supply state is maintained for the user to use.

In a specific further embodiment, after step S2, the method further includes the steps of: if not, the control valve 150 is controlled to close.

In a specific further embodiment, step S2 specifically includes:

s21, judging whether the induction values of the first temperature sensor 130 acquired within the preset time are all in a first temperature interval;

s22, if yes, determining that the flame at the fire cover 122 is normally combusted;

and S23, if not, determining that the flame at the fire cover 122 is abnormally combusted.

In a specific further embodiment, step S4 specifically includes:

s41, judging that tempering exists in the mixing cavity when the induction value of the second temperature sensor 140 is in a second temperature range;

and S42, when the induction value of the second temperature sensor 140 is in a third temperature range, judging that a backfire exists in the mixing cavity, wherein the temperature value of the second temperature range is greater than that of the third temperature range.

In the control method of the gas stove, the second temperature sensor 140 is used for sensing the temperature in the mixing cavity to determine whether tempering exists in the mixing cavity, the control valve 150 is closed when the tempering exists in the mixing cavity, and the gas is cut off in time, so that the generation of tempering is avoided, and further, the potential safety hazard caused by tempering and the damage problem of the gas stove 100 are avoided. Meanwhile, the second temperature sensor 140 is combined with the first temperature sensor 130, and only when the first temperature sensor 130 detects that the flame at the fire cover 122 is normally combusted, the second temperature sensor 140 can sense the temperature in the mixing cavity, so that the data processed by the control part can be reduced, and the processing cost of the control part can be reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A gas stove is characterized by comprising a stove body (110), a burner (120), a first temperature sensor (130), a second temperature sensor (140), a control valve (150) and a controller (160);

the burner (120) comprises a burner (121) and a fire cover (122) arranged on the burner (121), the burner (121) is arranged on the stove body (110) and is provided with a mixing cavity communicated with the fire cover (122), and the control valve (150) is connected with the burner (121) and an air source and is controlled to respectively switch on or off the mixing cavity and the air source when being opened or closed; the first temperature sensor (130) is used for sensing the temperature at the fire cover (122), and the second temperature sensor (140) is used for sensing the temperature of the mixing cavity; the controller (160) is in communication connection with the control valve (150), the first temperature sensor (130) and the second temperature sensor (140);

wherein the controller (160) is used for controlling the second temperature sensor (140) to sense the temperature of the mixing cavity when the normal combustion of the flame at the fire cover (122) is determined according to the sensing value of the first temperature sensor (130); the controller (160) is also used for controlling the control valve (150) to be closed when the existence of the backfire in the mixing cavity is determined according to the sensing value of the second temperature sensor (140).

2. The gas range as set forth in claim 1, wherein the controller (160) is further configured to control the control valve (150) to close when the abnormal combustion of the flame at the fire cover (122) is determined based on the value sensed by the first temperature sensor (130).

3. The gas range as claimed in claim 1, wherein the controller (160) is configured to determine that the flame at the fire cover (122) is normally combusted when the sensed values of the first temperature sensor (130) obtained within a preset time period are within a first temperature range.

4. The gas range according to claim 1, wherein the controller (160) is further configured to control the control valve (150) to close when the sensed value of the second temperature sensor (140) is in a second temperature interval; when the sensing value of the second temperature sensor (140) is in a third temperature interval, controlling the control valve (150) to be opened; the temperature value of the second temperature interval is greater than the temperature value of the third temperature interval.

5. Gas burner according to claim 1, characterized in that said second temperature sensor (140) is located inside said mixing chamber.

6. The gas range of claim 1, wherein the fire lid (122) comprises an outer ring fire lid (1221) and a central fire lid (1222) both disposed at the burner head (121), the outer ring fire lid (1221) is disposed around the central fire lid (1222), the mixing chamber is communicated with both the outer ring fire lid (1221) and the central fire lid (1222), and the first temperature sensor (130) is disposed between the outer ring fire lid (1221) and the central fire lid (1222).

7. A control method of a gas range, comprising:

acquiring a sensing value of a first temperature sensor (130) for sensing the temperature at the fire cover (122);

determining whether the flame at the fire cover (122) is normally burnt according to the sensing value of the first temperature sensor (130);

if yes, controlling a second temperature sensor (140) to sense the temperature in a mixing cavity in the furnace end (121);

judging whether tempering exists in the mixing cavity or not according to the induction value of the second temperature inductor (140);

if yes, the control valve (150) is controlled to be closed.

8. The control method according to claim 7, wherein after the step of determining whether the flame at the fire cover (122) is normally burned according to the sensing value of the first temperature sensor (130), further comprising:

if not, the control valve (150) is controlled to close.

9. The control method according to claim 8, wherein the step of determining whether the flame at the fire cover (122) is normally burned according to the sensing value of the first temperature sensor (130) comprises:

judging whether the induction values of the first temperature sensor (130) acquired within a preset time are all in a first temperature interval;

if yes, determining that the flame at the fire cover (122) is normally combusted;

if not, the abnormal combustion of the flame at the fire cover (122) is determined.

10. The control method according to claim 7, wherein the step of determining whether or not a flashback exists in the mixing chamber according to the sensing value of the second temperature sensor (140) comprises:

when the induction value of the second temperature sensor (140) is in a second temperature range, judging that tempering exists in the mixing cavity;

and when the induction value of the second temperature sensor (140) is in a third temperature interval, judging that tempering exists in the mixing cavity, wherein the temperature value of the second temperature interval is greater than that of the third temperature interval.