CN216776765U - Gas oven - Google Patents

Abstract

The utility model discloses a gas oven, relates to the technical field of kitchen appliances, and can reduce the manufacturing cost of the gas oven while ensuring that the gas oven has the capability of automatically adjusting the internal temperature. This gas oven includes: an oven body; a cooking cavity arranged in the oven body for accommodating food; a gas pipeline; the stepping motor is used for adjusting the opening of the gas regulating valve so as to control the flow rate of the gas supplied to the combustor from the gas pipeline; a temperature sensor for detecting a temperature value inside the cooking cavity; a controller connected to the stepper motor and the temperature sensor, respectively, the controller configured to: according to the temperature value detected by the temperature sensor and the set temperature value, the step motor is controlled to work, so that the temperature difference value between the temperature value in the cooking cavity and the set temperature value is smaller than or equal to the preset threshold value.

Description

Gas oven

Technical Field

The application relates to the technical field of kitchen appliances, in particular to a gas oven.

Background

The gas oven is a closed kitchen appliance for baking food, and can be used by users to make snacks such as bread, cake and biscuit, and also can be used to make dishes such as roast chicken, roast duck and roast beefsteak. With the improvement of living standard of people, the use of the gas oven becomes wide gradually.

At present, a mechanical gas oven is provided with a capillary temperature controller to detect the temperature of a cooking cavity of the gas oven and a gas regulating valve to regulate the gas flow. The capillary temperature controller can push a valve rod of the gas regulating valve to rotate along with the change of the temperature of the cooking cavity, so that the temperature of the gas oven can be controlled. But the capillary temperature controller can not realize the accurate control to the inside temperature of gas oven, influences user's culinary art and experiences.

An existing electronic gas oven is provided with a gas proportional valve to automatically adjust gas flow, so that accurate control of temperature in the oven is achieved, and for example, the temperature inside the gas oven is kept constant. However, the price of the gas proportional valve is expensive, so that the cost of the electronic gas oven is high, and the user experience is affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gas oven which can reduce the manufacturing cost of the gas oven while ensuring that the gas oven has the capability of automatically adjusting the internal temperature.

In order to achieve the purpose, the technical scheme is as follows:

the application provides a gas oven, includes: the oven comprises an oven body, wherein a cooking cavity is arranged in the oven body;

a burner for heating the food material inside the cooking cavity;

the gas pipeline is communicated with the combustor;

the stepping motor is connected with the gas regulating valve and used for regulating the opening of the gas regulating valve so as to control the flow rate of gas supplied to the combustor from the gas pipeline;

the temperature sensor is used for detecting the temperature value in the cooking cavity;

a controller connected to the stepping motor and the temperature sensor, respectively, and configured to:

according to the temperature value detected by the temperature sensor and the set temperature value, the step motor is controlled to work, so that the temperature difference value between the temperature value in the cooking cavity and the set temperature value is smaller than or equal to the preset threshold value.

The application provides a gas oven replaces the comparatively expensive gas proportional valve that uses in present electronic type gas oven with comparatively cheap step motor and gas governing valve to reduce electronic type gas oven's manufacturing cost. And, the gas oven that this application provided, the controller can control the velocity of flow of the gas that the gas pipeline supplied to the combustor through the aperture of controlling step motor work in order to adjust the gas governing valve, and then has realized the automatic adjustment to the inside temperature of oven to make the inside temperature of oven can keep at the settlement temperature, experience in order to guarantee user's culinary art.

In some embodiments, the rotating shaft of the stepping motor is in transmission connection with the valve rod of the gas regulating valve.

In some embodiments, the controller is configured to: if the temperature value detected by the temperature sensor is greater than the set temperature value and the temperature difference value is greater than the preset threshold value, controlling the stepping motor to rotate for a first step number according to a first direction so as to reduce the current opening of the gas regulating valve to a first opening; alternatively, the first and second electrodes may be,

and if the temperature value detected by the temperature sensor is smaller than the set temperature value and the temperature difference value is larger than the preset threshold value, controlling the stepping motor to rotate for a second step number according to a second direction so as to increase the current opening degree of the gas regulating valve to a second opening degree.

In some embodiments, the first step is determined from the temperature difference; alternatively, the second step is determined based on the temperature difference.

In some embodiments, the first direction is clockwise and the second direction is counter-clockwise; alternatively, the first direction is counterclockwise and the second direction is clockwise.

In some embodiments, the controller is further configured to: receiving the adjustment operation of a user on a set temperature value; and responding to the adjustment operation, and controlling the stepping motor to work according to the adjusted set temperature value so that the temperature difference value between the temperature value in the cooking cavity and the adjusted set temperature value is smaller than or equal to a preset threshold value.

In some embodiments, the controller is further configured to: receiving an operation of turning off the burner by a user; and controlling the stepping motor to rotate in response to the operation of closing the burner by a user so that the opening degree of the gas regulating valve is the minimum opening degree.

In some embodiments, the controller is further configured to: receiving an operation of starting a burner by a user;

and controlling the stepping motor to rotate in response to the operation of opening the burner by the user so that the opening degree of the gas regulating valve is a third opening degree.

In some embodiments, the gas-fired oven further comprises a display coupled to the controller.

In some embodiments, the controller is further configured to: the control display displays the temperature value detected by the temperature sensor.

Therefore, the temperature value in the cooking cavity is accurately displayed through the display, so that feedback can be conveniently carried out on a user, and the user can regulate and control the set temperature value of the gas oven according to the temperature value displayed by the display in real time.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the example serve to explain the principles of the utility model and not to limit the utility model.

Fig. 1 is a schematic structural diagram of a gas oven provided in an embodiment of the present application;

fig. 2 is a block diagram of a hardware configuration of a gas oven provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a stepping motor according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a gas regulating valve provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a connection device according to an embodiment of the present disclosure.

Reference numerals: a gas oven 100; an oven body 101; an oven door 102; a display 103; a control panel 104; a controller 105; a temperature sensor 106; a stepping motor 107; a gas line 108; a burner 109; a gas regulating valve 110; a connecting device 111; control buttons 1041; a control button 1042; control buttons 1043.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present application.

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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As described in the background art, in a conventional electronic gas oven, a gas proportional valve is provided to control the flow rate of gas supplied from a gas pipe to a burner, thereby keeping a temperature value in the oven constant. However, the gas proportional valve is expensive, which results in high cost of the gas oven. The application provides a gas oven on the basis of current electronic type gas oven to the step motor and the gas proportional valve that the price is comparatively cheap replace the comparatively expensive gas proportional valve, have reduced the cost of gas oven. And the opening degree of the gas proportional valve is adjusted by controlling the work of the stepping motor, so that the automatic adjustment of the temperature of the gas oven is realized, the temperature inside the oven can be kept at the set temperature, and the user is guaranteed to have good cooking experience.

For further description of the solution of the present application, fig. 1 is a schematic structural diagram of a gas oven provided in an embodiment of the present application. As shown in fig. 1, the gas oven 100 includes an oven body 101, an oven door 102, a display 103, a control panel 104, and a controller 105 (not shown in fig. 1).

The oven body 101 is connected with the oven door 102 through a damper hinge device, and an attraction device for attracting the oven door 102 and a push rod device for opening the oven door 102 are arranged between the oven body 101 and the oven door 102.

The oven body 101 is internally provided with a cooking cavity (not shown in fig. 1) for containing food material.

In some embodiments, the display 103 may be a liquid crystal display, an organic light-emitting diode (OLED) display. The particular type, size, resolution, etc. of the display 103 is not limited, and those skilled in the art will appreciate that the display 103 may be modified in performance and configuration as desired. The display 103 is connected to the controller 105.

In some embodiments of the present application, the display 103 is configured to display a real-time temperature value inside the cooking cavity detected by the temperature sensor 106, so that a user can know a current temperature value inside the cooking cavity through the display 103, thereby implementing feedback to the user.

In some embodiments, control panel 104 can include a plurality of control buttons (e.g., control button 1041, control button 1042, and control button 1043). Each control button may have a different function, for example, control button 1041 may serve as an ignition button and may be used to turn on or off the burner 109 described below. Control button 1042 may be used as a time button for setting the time that gas oven 100 cooks food. Control button 1043 may be a temperature button, and a user may set a temperature value for baking food for gas oven 100 via control button 1043, or may change the set temperature value for the gas oven via control button 1043. A plurality of control buttons on the control panel 104 are each connected to the controller 105.

Fig. 2 is a block diagram schematically illustrating a hardware configuration of the gas oven 100 according to an embodiment of the present application. As shown in fig. 2, the gas oven 100 may also include one or more of the following: a temperature sensor 106, a stepping motor 107, a gas pipeline 108, a burner 109, a gas regulating valve 110, a connecting device 111 and the like.

In some embodiments, the temperature sensor 106 refers to a sensor that can detect temperature and can convert the detected temperature into a usable output signal, and the temperature sensor 106 is connected to the controller 105.

In some embodiments of the present application, the temperature sensor 106 is used to detect a temperature value in the cooking cavity.

Alternatively, the temperature sensor 106 may be an electronic temperature-sensitive probe. The temperature sensor 106 may be disposed at the top of the cooking cavity, or disposed at the middle of the cooking cavity, or disposed at the bottom of the cooking cavity, and the position of the temperature sensor 106 disposed in the cooking cavity is not limited in the embodiment of the present application.

In some embodiments, the controller 105 may periodically detect the temperature in the cooking cavity through the temperature sensor 106, and control the operation of the stepping motor 107 according to the temperature value detected by the temperature sensor 106 and the temperature value set by the user, so that the temperature difference between the temperature value in the cooking cavity and the set temperature value is less than or equal to the preset threshold value.

The detection period may be preset by the manufacturer of the gas oven 100, for example, the detection period is 5 minutes. The preset threshold may also be preset by the manufacturer of the gas oven 100, for example, the preset threshold is 8 degrees celsius.

In some embodiments, as shown in fig. 3, a schematic structural diagram of a stepping motor 107 provided in the embodiments of the present application is provided. The stepping motor 107 refers to an open-loop control element that converts an electric pulse signal into an angular displacement or a linear displacement. The stepping motor 107 is connected to the controller 105 and the gas control valve 110, respectively. It should be noted that the connection mode of the stepping motor 107 and the gas regulating valve 110 is that the rotating shaft end of the stepping motor 107 is in transmission connection with the valve rod of the gas regulating valve 110.

In some embodiments of the present application, the stepper motor 107 is used to adjust the opening of the gas regulating valve 110 to control the flow rate of the gas supplied by the gas line 108 to the burner 109.

In some embodiments, the gas pipeline 108 refers to a special pipeline for conveying combustible gas, and is a special metal gas pipe.

In some embodiments of the present application, the gas line 108 is used to deliver combustible gas to the burner 109. Wherein, the combustible gas comprises liquefied petroleum gas (liquid), artificial gas, natural gas and the like.

In some embodiments, the burner 109 is a direct-fired heating appliance using combustible gas fuel, and when the gas oven 100 is in operation, gas enters the burner 109 from the gas pipe 108 through the regulation of the gas regulating valve 110, and a part of air is mixed. The mixture is ejected from the flame path of the burner 109 and ignited by the ignition device to form flames, which are used to heat the cooking chamber.

In some embodiments, as shown in fig. 4, for a schematic structural diagram of a gas regulating valve 110 provided in the embodiments of the present application, a connection device 111 is provided at a rotating shaft end of the gas regulating valve 110, and the gas regulating valve 110 may be connected to the stepping motor 107 through the connection device 111.

Exemplarily, as shown in fig. 5, a schematic structural diagram of a connection device 111 according to an embodiment of the present application is provided.

The gas regulating valve 110 is disposed on the gas pipeline 108, and the gas regulating valve 110 is used for regulating the flow rate of the gas supplied from the gas pipeline 108 to the burner 109.

Alternatively, the gas regulating valve 110 may be a mechanical gas regulating valve.

Optionally, a stop valve and a thermocouple connected to the stop valve are disposed inside the gas regulating valve 110. Wherein the shutoff valve is used for controlling the gas in the gas pipeline 108 to enter the burner 109.

The thermocouple is a temperature sensing element, and when the thermocouple detects that the temperature value of the cooking cavity is greater than or equal to the threshold value of the thermocouple, the thermocouple can generate thermoelectromotive force to attract the stop valve, so that the smoothness of the gas pipeline 108 is kept, and the gas in the gas pipeline 108 can continuously enter the combustor 109. When the thermocouple detects that the temperature value of the cooking cavity is smaller than the threshold value of the thermocouple, the thermocouple stops generating the thermal electromotive force, the stop valve stops being closed, the valve of the stop valve resets, and therefore gas in the gas pipeline 108 cannot enter the combustor 109. The gas pipeline 108 can be kept smooth by the thermocouple when flame exists in the cooking cavity, and once the flame is extinguished, the gas pipeline 108 is blocked, so that gas leakage is avoided.

Although not shown in fig. 2, the gas oven 100 may further include a power supply device (such as a battery and a power management chip) for supplying power to each component, and the battery may be logically connected to the controller 105 through the power management chip, so as to implement functions such as power consumption management of the gas oven 100 through the power supply device.

It is to be understood that the illustrated construction of the embodiments of the utility model does not constitute a specific limitation on gas ovens. In other embodiments of the present application, the gas-fired oven may include more or fewer components than shown, or some components may be combined, or some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The operation of a gas oven provided in the embodiments of the present application will be described below.

When a user begins to cook food using gas oven 100, the user may sequentially rotate control buttons 1041, 1042, and 1043 on control panel 104 of gas oven 100 to begin operation of gas oven 100.

The burner 109 is turned on by turning the control button 1041, the baking time is set by turning the control button 1042, and the baking temperature is set by turning the control button 1043.

After receiving the operation of opening the burner 109 by the user, the controller 105 responds to the operation of opening the burner 109 by the user, and controls the stepping motor 107 to rotate by a corresponding number of steps according to the set temperature value, so that the opening of the gas regulating valve 110 is a third opening, and the temperature value in the cooking cavity reaches the set temperature value.

It can be understood that the temperature inside the cooking cavity is related to the flow rate of the gas supplied by the gas pipeline 108 to the burner 109, and the flow rate of the gas supplied by the gas pipeline 108 to the burner 109 is related to the opening degree of the gas regulating valve 110, i.e. the temperature inside the cooking cavity has a correlation with the opening degree of the gas regulating valve 110. The third opening of the gas control valve 110 is adjusted to quickly bring the temperature inside the cooking cavity to the set temperature value.

Assume that the number of steps available to the stepper motor 107 is 28 steps, each step corresponding to 10 degrees celsius. That is, every time the stepping motor 107 rotates one step, the temperature value in the cooking cavity changes by 10 degrees after the opening degree of the gas regulating valve 110 is adjusted in a linkage manner.

Assuming that the baking time set by the user is 1 hour, the baking temperature is 220 ℃, and the preset threshold is 8 ℃. The controller 105 controls the stepping motor 113 to rotate for 22 steps, so that the opening degree of the gas regulating valve 110 reaches the third opening degree, and the temperature value in the cooking cavity reaches the set temperature value of 220 ℃.

During operation of gas oven 100, controller 105 may periodically sense a temperature value inside the cooking cavity via temperature sensor 106.

In some embodiments, if the controller 105 detects that the temperature value inside the cooking cavity is greater than the set temperature value according to the temperature sensor 106 and the temperature difference between the detected temperature value and the set temperature value is greater than the preset threshold value in a certain detection period, the controller 105 controls the stepping motor 107 to rotate in the first direction for a first number of steps to reduce the gas regulating valve 110 from the current opening degree to the first opening degree. The gas regulating valve 110 is decreased from the current opening degree to the first opening degree in order to decrease the current temperature value inside the cooking cavity to the set temperature value.

Wherein the first number of steps is determined based on the temperature difference.

For example, it is assumed that the controller 105 detects the current temperature value inside the cooking cavity as 240 degrees celsius through the temperature sensor 106, and sets the temperature value as 220 degrees celsius and the temperature difference as 20 degrees celsius. The controller 105 may control the stepping motor 107 to rotate 2 steps in the first direction to decrease the gas regulating valve 110 from the current third opening degree to the first opening degree.

In some embodiments, if the controller 105 detects that the temperature value inside the cooking cavity detected by the temperature sensor 106 is smaller than the set temperature value and the temperature difference between the detected temperature value and the set temperature value is greater than the preset threshold value in a certain detection period, the controller 105 controls the stepping motor 107 to rotate in the second direction for a second number of steps to increase the gas regulating valve 110 from the current opening degree to the second opening degree. Increasing the gas adjustment valve 110 from the current opening degree to the second opening degree increases the current temperature value inside the cooking cavity to the set temperature value.

Wherein the second number of steps is determined based on the temperature difference.

For example, assume that the controller 105 temperature sensor 106 detects a current temperature value of 180 degrees celsius inside the cooking cavity, and sets the temperature value to 220 degrees celsius with a temperature difference of 40 degrees celsius. The controller may control the stepping motor 107 to rotate 4 steps in the second direction to increase the gas regulating valve 110 from the third opening degree to the second opening degree.

If the first direction is clockwise, the second direction is counterclockwise. Alternatively, if the first direction is counterclockwise, the second direction is clockwise. The embodiments of the present application do not limit this.

It can be understood that the controller controls the step motor to rotate corresponding steps according to the temperature difference value, so that the temperature value in the cooking cavity reaches a set temperature value, and the temperature compensation of the temperature in the gas oven is realized.

So, the controller is through the inside temperature value of periodic detection culinary art chamber, and then according to the temperature value and the temperature difference between the settlement temperature value, and control step motor rotates the aperture that corresponding step adjusted the gas governing valve and controls the velocity of flow of the gas pipeline to the gas of combustor supply, has realized the automatic adjustment to the inside temperature of oven, has also realized temperature compensation promptly to make the inside temperature of oven can keep setting for the temperature, experience in order to guarantee user's culinary art.

In some embodiments, if the controller 105 detects that the temperature difference between the temperature value inside the cooking cavity detected by the temperature sensor 106 and the set temperature value is less than or equal to the preset threshold value in a certain detection period, the controller 105 may not need to control the stepping motor 107 to rotate.

For example, assume that the controller 105 detects the current temperature value inside the cooking cavity as 212 degrees celsius to 228 degrees celsius via the temperature sensor 106, and sets the temperature value as 220 degrees celsius. Because the difference between the current temperature value inside the cooking cavity and the set temperature value is less than or equal to the preset threshold value of 8 ℃, the controller 105 does not need to control the stepping motor 107 to rotate, so that the gas regulating valve 110 keeps the current opening degree.

Further, in the process that the user uses the gas oven 100 to bake food, the user can check the current temperature value in the cooking cavity in real time through the display 103, and check the coloring degree of the food through the oven door 102, and then adjust the set temperature value.

It will be appreciated that the food may need to be set at different temperatures at different stages during the toasting process. The user can rotate the control button 1043 to adjust the set temperature value, so that the food can be cooked well.

After receiving the adjustment operation of the set temperature value by the user, the controller 105 responds to the adjustment operation, and controls the stepping motor to rotate by a corresponding step number according to the temperature difference value between the adjusted temperature value and the set temperature value, so that the temperature difference value between the temperature value in the cooking cavity and the adjusted set temperature value is smaller than or equal to a preset threshold value.

Assuming that the set temperature value adjusted by the user is 200 degrees celsius and the current temperature value inside the cooking cavity is 220 degrees celsius, the controller 105 controls the stepping motor 107 to rotate 2 steps in the first direction to decrease the current opening of the gas regulating valve 110.

Assuming that the set temperature value adjusted by the user is 240 degrees celsius and the current temperature value inside the cooking cavity is 220 degrees celsius, the controller 105 controls the stepping motor 107 to rotate 2 steps in the second direction to increase the current opening of the gas regulating valve 110.

After the gas-fired oven 100 finishes baking the food, the user may rotate the control button 1041 to perform an operation of turning off the burner 109.

The controller 105 receives an operation of closing the burner 109 by a user, and controls the stepping motor 107 to rotate in response to the operation of closing the burner 109 so that the opening degree of the gas adjusting valve 110 becomes the minimum opening degree.

For example, assuming that the current temperature value inside the cooking cavity is 180 degrees celsius, the controller 105 controls the stepping motor 107 to rotate 18 steps in the second direction, so that the opening degree of the gas regulating valve 110 is reduced to a minimum opening degree, for example, 0 degrees, so that the gas in the gas pipeline 108 cannot enter the burner 109, and the burner 109 stops working, thereby avoiding gas leakage.

It should be noted that, the algorithm flows used in the above embodiments all use existing algorithms, and the embodiments of the present application do not relate to improvement of existing algorithms.

In addition, the gas oven provided by the above embodiment can also be called as a gas oven.

The embodiment of the application provides a gas oven, on the one hand with comparatively cheap step motor and gas governing valve replace the comparatively expensive gas proportional valve that present electronic type gas oven used to reduce the manufacturing cost of gas oven. And, the gas oven that this application provided, the controller can be according to the temperature value that temperature sensor detected and set for the temperature value, and control step motor rotates corresponding step number in order to adjust the aperture of gas governing valve, comes to control the velocity of flow of the gas that the gas pipeline supplied to the combustor, and then has realized the automatic adjustment to culinary art intracavity temperature to make the inside temperature of oven can keep setting for the temperature, guaranteed user's culinary art and experienced.

On the other hand, the mechanical gas oven uses the combination of the capillary temperature controller and the gas regulating valve to control the temperature of the cooking cavity in the oven, so that the temperature compensation of the temperature in the cooking cavity can not be carried out under different working states. The gas oven provided by the embodiment of the application uses the combination of the stepping motor and the gas regulating valve, a temperature compensation program can be written in a chip of the controller in advance, and the controller controls the stepping motor to rotate in real time according to the temperature compensation program, so that the stability of temperature change in the cooking cavity is kept. Therefore, the gas oven provided by the embodiment of the application has the advantages that the temperature compensation is increased, the stability of the temperature can be kept under different working states, and the cooking experience of a user is guaranteed compared with a mechanical gas oven.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A gas-fired oven, comprising:

the oven comprises an oven body, wherein a cooking cavity is arranged inside the oven body;

a burner for heating food material inside the cooking cavity;

a gas line in communication with the burner;

the gas regulating valve is arranged on the gas pipeline;

the stepping motor is connected with the gas regulating valve and is used for regulating the opening of the gas regulating valve so as to control the flow rate of the gas supplied to the combustor by the gas pipeline;

a temperature sensor for detecting a temperature value inside the cooking cavity;

a controller connected to the stepper motor, the temperature sensor, and the controller configured to:

and controlling the stepping motor to work according to the temperature value detected by the temperature sensor and the set temperature value, so that the temperature difference value between the temperature value in the cooking cavity and the set temperature value is smaller than or equal to a preset threshold value.

2. The gas-fired oven of claim 1, wherein a rotary shaft end of said stepper motor is drivingly connected to a valve stem of said gas regulator valve.

3. The gas-fired oven of claim 2, wherein the control appliance is configured to:

if the temperature value detected by the temperature sensor is greater than the set temperature value and the temperature difference value is greater than the preset threshold value, controlling the stepping motor to rotate for a first step number according to a first direction so as to reduce the current opening degree of the gas regulating valve to a first opening degree; alternatively, the first and second liquid crystal display panels may be,

and if the temperature value detected by the temperature sensor is smaller than the set temperature value and the temperature difference value is larger than the preset threshold value, controlling the stepping motor to rotate for a second step number according to a second direction so as to increase the current opening degree of the gas regulating valve to a second opening degree.

4. A gas-fired oven as claimed in claim 3, characterised in that said first step is determined as a function of said temperature difference; alternatively, the second step is determined based on the temperature difference.

5. The gas-fired oven of claim 3, wherein said first direction is a clockwise direction and said second direction is a counter-clockwise direction; or, the first direction is a counterclockwise direction, and the second direction is a clockwise direction.

6. The gas-fired oven of any of claims 2 to 5, wherein the controller is further configured to:

receiving the adjustment operation of the set temperature value by a user;

and responding to the adjustment operation, and controlling the stepping motor to work according to the adjusted set temperature value so that the temperature difference value between the temperature value in the cooking cavity and the adjusted set temperature value is smaller than or equal to a preset threshold value.

7. The gas-fired oven of any of claims 2 to 5, wherein the controller is further configured to:

receiving an operation of turning off the burner by a user;

and controlling the stepping motor to rotate in response to the operation of closing the burner by the user so that the opening degree of the gas regulating valve is the minimum opening degree.

8. The gas-fired oven of any of claims 2 to 5, wherein the controller is further configured to:

receiving an operation of a user to start the burner;

and controlling the stepping motor to rotate in response to the operation of opening the burner by the user so that the opening degree of the gas regulating valve is a third opening degree.

9. The gas-fired oven of claim 1, further comprising a display connected to the controller.

10. The gas-fired oven of claim 9, wherein the controller is further configured to:

and controlling the display to display the temperature value detected by the temperature sensor.

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