CN112032769A - Gas stove and control method and control device thereof - Google Patents

Abstract

The invention discloses a gas stove, a control method and a control device of the gas stove, wherein the control method comprises the following steps: acquiring an electric signal of the thermocouple sensing device; when the electric signal is smaller than a preset threshold value, acquiring a detection signal of the flame detection device; judging whether flame exists in the gas stove or not according to the detection signal; and when flame exists in the gas stove, providing a valve maintenance signal for maintaining the opening state for the electromagnetic valve. So set up for the gas can let in the fire hole through the solenoid valve, guarantees the normal work of gas-cooker, and then can prevent that the gas solenoid valve from putting out a fire because of the accident. The flame detection capability of the flame-out protection device of the gas stove is improved, the sensitivity is improved, and the use experience of a user is improved.

Description

Gas stove and control method and control device thereof

Technical Field

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

Background

Along with the improvement of living standard of people, many intelligent household appliances gradually enter the lives of people. At present, most people use gas cookers to cook, when the gas cookers work, gas enters the cookers from the gas inlet pipe, enters the base through the adjustment of the gas electromagnetic valve, and mixes a part of air, and the mixed gas is sprayed out from the fire holes of the distributor and is ignited by the ignition device to form flames which are used for heating cookers on the support.

At present, a gas stove is generally provided with a thermocouple sensing needle, and the thermocouple sensing needle is positioned at a fire hole and used for sensing whether flame exists at the fire hole. When flame exists at the fire hole, current for maintaining the opening of the gas electromagnetic valve is generated; when no flame exists at the fire hole, the current is not enough to maintain the opening of the gas electromagnetic valve, and the gas passage is disconnected for the conventional flameout protection function.

However, in daily life, when a user cooks with a gas stove, if wind blows to a fire hole at a position where a thermocouple sensing needle is installed first, flames of a few fire holes near the thermocouple sensing needle are often extinguished or deviated, so that the thermocouple sensing needle cannot sense the flames, current is continuously reduced, and a gas electromagnetic valve is closed and is accidentally extinguished.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is that the flameout detection capability of the flameout protection device of the gas stove in the prior art is poor and insensitive, and the user experience is seriously influenced. Thereby providing a gas stove, a control method and a control device of the gas stove.

In order to achieve the above object, an embodiment of the present invention provides a gas range, including: an electromagnetic valve; the controller is electrically connected with the electromagnetic valve; the thermocouple sensing device is arranged on a burner of the gas stove and is electrically connected with the electromagnetic valve; and the flame detection device is electrically connected with the controller.

Optionally, the burner comprises a base, a central fire cover and an outer ring fire cover; the thermocouple sensing device is arranged on the base, and the head of the thermocouple sensing device is close to the fire outlet hole of the central fire cover; the flame detection device is arranged below the outer ring fire cover.

Optionally, the gas stove further comprises an ignition needle, and the ignition needle is arranged on the base and connected with the controller.

Optionally, the flame detection device is a light sensitive sensor.

Optionally, the flame detection device is disposed on the burner opposite the thermocouple sensing device.

The embodiment of the invention also provides a control method of the gas stove, the gas stove comprises a thermocouple sensing device, a flame detection device, an electromagnetic valve and a controller, and the controller is connected with the electromagnetic valve; the thermocouple sensing device is arranged on a burner of the gas stove and is connected with the electromagnetic valve; the flame detection device is arranged on a burner of the gas stove and connected with the controller;

the control method comprises the following steps: acquiring an electric signal of the thermocouple sensing device; when the electric signal is smaller than a preset threshold value, acquiring a detection signal of the flame detection device; judging whether flame exists in the gas stove or not according to the detection signal; and when flame exists in the gas stove, providing a valve maintenance signal for maintaining the opening state for the electromagnetic valve.

Optionally, after providing the maintenance valve signal for maintaining the open state for the solenoid valve, the method further comprises: judging whether the electric signal of the thermocouple sensing device is recovered to be normal within a first preset time; if yes, stopping providing the dimensional valve signal; if not, the electromagnetic valve is controlled to be closed.

Optionally, when the gas stove further comprises an ignition needle disposed on the burner and connected to the controller, the control method of the gas stove further comprises: and when no flame exists in the gas stove, controlling the ignition needle to ignite again.

Optionally, after controlling the ignition needle to ignite again, the method includes: and when the ignition is not successful within the preset ignition frequency/second preset time, controlling the electromagnetic valve to be closed.

Optionally, after controlling the electromagnetic valve to close, the method further includes: and sending an alarm prompt message.

The embodiment of the invention also provides a control device of the gas stove, which comprises the following components: the first acquisition module is used for acquiring an electric signal of the thermocouple sensing device; the second acquisition module is used for acquiring a detection signal of the flame detection device when the electric signal is smaller than a preset threshold value; the processing module is used for judging whether flame exists in the gas stove or not according to the detection signal; the first control module is used for providing a valve maintenance signal for maintaining an opening state for the electromagnetic valve when flame exists in the gas stove.

The embodiment of the invention provides a computer-readable storage medium, wherein computer instructions are stored in the computer-readable storage medium and used for enabling a computer to execute a control method of a gas stove in any one embodiment.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the embodiment of the invention provides a control method of a gas stove, which comprises the following steps: acquiring an electric signal of the thermocouple sensing device; when the electric signal is smaller than a preset threshold value, acquiring a detection signal of the flame detection device; judging whether flame exists in the gas stove or not according to the detection signal; and when flame exists in the gas stove, providing a valve maintenance signal for maintaining the opening state for the electromagnetic valve.

So set up, can blow earlier when the fire hole to installation thermocouple induction system position department at wind for near a small number of fire hole flames in thermocouple induction system extinguish or skew appear, accessible flame detection device detects whether other fire holes have flame, when other fire holes have flame, normally opens through controller control solenoid valve, thereby makes the gas let in the fire hole through the solenoid valve, guarantees the normal work of gas-cooker, and then can prevent that the gas solenoid valve from extinguishing out because of the accident. The flame detection capability of the flame-out protection device of the gas stove is improved, the sensitivity is improved, and the use experience of a user is improved.

2. According to the embodiment of the invention, whether the electric signal of the thermocouple sensing device is normal within the preset time is judged, when the electric signal is normal, the flame is normally burnt, and the voltage and the current provided by the thermocouple sensing device are enough to ensure the normal work of the electromagnetic valve, so that the maintenance valve signal provided by the controller can be stopped at the moment. If the electric signal still can't resume normal in the preset time, it is great to explain wind-force, can't make flame normally burn, so the controller stops to provide the dimension valve signal for the solenoid valve, and the control solenoid valve closes completely, avoids because of the long-term wind blows can't resume burning and lead to the gas to gather and produce danger.

3. According to the embodiment of the invention, when the flame is detected not to exist in the gas stove, the ignition needle is controlled to be ignited again, so that the gas stove can work normally again, manual repeated ignition is avoided, and the burden of a user is reduced.

4. According to the embodiment of the invention, when the ignition is not successful within the preset ignition frequency/preset time, the electromagnetic valve is controlled to be closed, so that the danger caused by the fact that the combustion cannot be recovered due to long-term wind blowing is avoided.

5. According to the embodiment of the invention, by sending the alarm prompt message, after the user knows the alarm prompt message, the window can be opened for ventilation, and the switch knob of the gas stove is closed, so that the danger caused by gas accumulation due to the fact that the combustion cannot be recovered due to long-term blowing is avoided, and the safety coefficient of the gas stove is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for a worker of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a gas range according to an embodiment of the present invention;

fig. 2 is a flowchart of a control method of a gas range according to an embodiment of the present invention.

Reference numerals:

1-a base; 2-central fire cover; 3-outer ring fire cover; 4-thermocouple sensing means; 5-a photosensitive sensor; 6-a controller; 7-electromagnetic valve.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a worker skilled in the art without creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should 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; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases by a worker of ordinary skill in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

At present, a gas stove is generally provided with a thermocouple sensing needle, and the thermocouple sensing needle is positioned at a fire hole and used for sensing whether flame exists at the fire hole. When flame exists at the fire hole, current for maintaining the opening of the gas electromagnetic valve 7 is generated; when no flame exists at the fire hole, the current is not enough to maintain the opening of the gas electromagnetic valve 7, and the gas passage is disconnected for the conventional flameout protection function. However, in daily life, when a user cooks with a gas stove, if wind blows to the fire hole where the thermocouple sensing needle is installed first, flame in a few fire holes near the thermocouple sensing needle is often extinguished or deviated, so that the thermocouple sensing needle cannot sense flame, current is continuously reduced, and the gas solenoid valve 7 is closed and is accidentally extinguished.

Example 1

As shown in fig. 1, an embodiment of the present invention provides a gas range including a solenoid valve 7, a controller 6, a thermocouple sensing device 4, and a flame detection device.

In the embodiment of the present invention, the controller 6 is electrically connected to the solenoid valve 7, and the thermocouple sensing device 4 is disposed on the burner of the gas range and electrically connected to the solenoid valve 7. The flame detection device is also provided on the burner of the gas range and is electrically connected to the controller 6.

The burner comprises a base 1, a central fire cover 2 and an outer ring fire cover 3. The thermocouple sensing device 4 is arranged on the base 1, and the head of the thermocouple sensing device 4 is close to the fire outlet hole of the central fire cover 2. The flame detection means may be a photosensor 5, the photosensor 5 is oppositely disposed on the burner, and the photosensor 5 may be disposed below the outer ring fire cover 3. Because the photosensitive sensor 5 is arranged below the outer ring fire cover 3, the influence of external illumination on the photosensitive sensor 5 is small.

So set up, can blow earlier when the fire hole to installation thermocouple induction system 4 position department at wind for near thermocouple induction system 4 a small number of fire hole flames extinguish or skew appear, accessible flame detection device detects whether there is flame in other fire holes, when there is flame in other fire holes, normally open through controller 6 control solenoid valve 7, thereby make the gas let in the fire hole through solenoid valve 7, guarantee the normal work of gas-cooker, and then can prevent that gas solenoid valve 7 from extinguishing because of the accident. The flame detection capability of the flame-out protection device of the gas stove is improved, the sensitivity is improved, and the use experience of a user is improved.

As an alternative, the flame detection device may be other devices for detecting flames, such as thermocouple sensing devices, fire detection needles, etc. Compared with other flame detection devices, the photosensitive sensor can enlarge the detection range, namely, the number of the detection fire holes can be increased, and the detection sensitivity can be further improved.

Example 2

As shown in fig. 2, an embodiment of the present invention provides a control method of a gas stove, which is applied to the gas stove of any of the above embodiments, and the gas stove specifically includes the following control steps:

s1, acquiring an electric signal of the thermocouple sensing device 4;

the thermocouple induction device 4 is composed of two different metals, forms a loop with corresponding leads, burns the induction head by flame to generate temperature difference between the two metals, then generates electromotive force and current, thereby maintaining the opening of an electromagnetic valve 7 connected with the thermocouple induction device, and the electromagnetic valve 7 is arranged on a gas pipeline of the gas stove and used for controlling the opening and closing of the gas pipeline. The higher the temperature, the higher the voltage, the higher the current. When the flame disappears or is small to a certain degree, the temperature of the thermocouple sensing device 4 will slowly decrease, and when the voltage drops to a certain value, the voltage can not maintain the opening of the electromagnetic valve 7.

Therefore, when the gas stove normally generates flame, the thermocouple induction device 4 can maintain the electromagnetic valve 7 in an open state through the electromotive force generated by the thermocouple induction device, so that the gas pipeline can continuously supply gas to the gas stove.

Therefore, it is necessary to obtain an electrical signal of the thermocouple sensing device 4, which may be a voltage signal or a current signal.

When wind blows to the fire hole at the position where the thermocouple sensing device 4 is installed, flame of a few fire holes near the thermocouple sensing device 4 is often extinguished or deviated, so that the thermocouple sensing needle cannot sense the flame, the temperature of the thermocouple sensing device 4 is reduced, and the voltage and the current are continuously reduced.

In the present embodiment, only the voltage signal is illustrated.

S2, when the electric signal is smaller than a preset threshold value, acquiring a detection signal of the flame detection device;

and when the voltage of the thermocouple sensing device 4 continuously drops to a preset value, acquiring a detection signal of the flame detection device. In this embodiment, the flame detection device may be the photosensor 5, so that the current signal emitted from the photosensor 5 is acquired.

Since the photosensitive sensor 5 is disposed on the burner, when there is a flame in the fire hole at another position, the photosensitive sensor 5 can detect the light emitted from the flame, and the current in the photosensitive sensor 5 is large. When the fire hole at other position has no flame, a small current, which is the minimum current, passes through the photosensitive sensor 5 due to the influence of the external light.

S3, judging whether flame exists in the gas stove or not according to the detection signal;

and judging whether flames exist in fire holes at other positions or not according to the detected current signal. When the flame is in other positions, the obtained current is larger than the minimum current, and when the flame is not in other positions, the obtained current is the minimum current.

And S4, when flame exists in the gas stove, providing a valve maintenance signal for maintaining the opening state for the electromagnetic valve 7.

When the detected current is large, i.e. when there is a flame in the gas range, a voltage is supplied to the solenoid valve 7, so that the solenoid valve 7 can be in an open state, which may be referred to as a wife valve signal, i.e. a signal to maintain the solenoid valve 7 open.

So set up, can make the gas let in the fire hole through solenoid valve 7, guarantee the normal work of gas-cooker, and then can prevent that gas solenoid valve 7 from putting out a fire because of accident. The flame detection capability of the flame-out protection device of the gas stove is improved, the sensitivity is improved, and the use experience of a user is improved.

Optionally, in an embodiment of the present invention, after step S4, the method further includes the following steps:

s5, judging whether the electric signal of the thermocouple sensing device 4 is recovered to be normal within a first preset time;

s6, if yes, stopping providing the dimensional valve signal;

s7, if not, controlling the electromagnetic valve 7 to close.

Specifically, by acquiring an electric signal of the thermocouple sensing device 4, it can be known whether the flame of the fire hole is normal. When the electric signal of the thermocouple sensing device 4 is normal, it can be determined that the flame of the fire hole is also in a normal state at the time. Similarly, if the electrical signal is abnormal, it indicates that the flame of the fire hole is abnormal.

If the flame of the fire hole can be recovered to the normal state within the first preset time, for example, ten seconds or twenty seconds, which indicates that no wind exists, the voltage generated by the thermocouple sensing device 4 can ensure that the electromagnetic valve 7 is in the open state, so that the valve maintenance signal needs to be stopped from being provided for the electromagnetic valve 7 at this time.

If the flame of the fire hole can not be recovered to the normal state within the first preset time, the wind power is larger at the moment, the gas stove can not work normally, the electromagnetic valve 7 needs to be controlled to be closed completely, and the danger caused by gas accumulation due to the fact that the combustion can not be recovered due to long-term wind blowing is avoided.

Optionally, in this embodiment of the present invention, the control method further includes:

s8, when flame does not exist in the gas stove, controlling the ignition needle to ignite again; and when the ignition is not successful within the preset ignition frequency/second preset time, controlling the electromagnetic valve 7 to be closed.

The gas stove is provided with an ignition needle, and when the fact that flame does not exist in the gas stove is detected, the ignition needle is controlled to ignite again. And the number of ignitions of the ignition needle or the elapsed time of ignition is calculated.

When the ignition is not successfully completed yet after a preset number of times of ignition has passed, for example, ten times, fifteen times, or after a second preset time, for example, ten seconds, twenty seconds, the control solenoid valve 7 is fully closed. Avoid because of the unable recovery burning of long-term wind-blowing and lead to the gas to gather and produce danger.

Alternatively, in the embodiment of the present invention, after the control solenoid valve 7 of steps S7 and S8 is closed, the control method further includes:

and S9, sending out alarm prompt information.

Specifically, the prompt may be performed by a buzzer or other alarm device, or by a voice prompt device. So set up, after the user knows warning prompt message, can open the window and ventilate to close the switch knob of gas-cooker, avoid blowing for a long time and can't resume burning and lead to the gas to gather and produce danger, improved the factor of safety of gas-cooker.

Example 3

The embodiment of the invention also provides a control device of the gas stove, which comprises the following components:

the first acquisition module is used for acquiring the electric signal of the thermocouple sensing device 4; for details, refer to step S1 of the above embodiment, which is not described again in this embodiment;

the second acquisition module is used for acquiring a detection signal of the flame detection device when the electric signal is smaller than a preset threshold value; for details, refer to step S2 of the above embodiment, which is not described again in this embodiment;

the processing module is used for judging whether flame exists in the gas stove or not according to the detection signal; for details, refer to step S3 of the above embodiment, which is not described again in this embodiment;

a first control module for providing a maintenance valve signal for maintaining an open state for the solenoid valve 7 when a flame exists in the gas range; for details, refer to step S4 of the above embodiment, which is not repeated herein.

Has the advantages that: can make the gas let in the fire hole through solenoid valve 7, guarantee the normal work of gas-cooker, and then can prevent that gas solenoid valve 7 from putting out fire because of accident. The flame detection capability of the flame-out protection device of the gas stove is improved, the sensitivity is improved, and the use experience of a user is improved.

Example 4

The embodiment of the invention also provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are used for enabling the computer to execute the control method of the gas stove in any embodiment.

The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Variations and modifications in other variations may occur to those skilled in the art based upon the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (12)

1. A gas range, comprising:

an electromagnetic valve;

the controller is electrically connected with the electromagnetic valve;

the thermocouple sensing device is arranged on a burner of the gas stove and is electrically connected with the electromagnetic valve;

and the flame detection device is arranged on the burner of the gas stove and is electrically connected with the controller.

2. The gas range of claim 1, wherein the burner comprises a base, a central fire cover and an outer ring fire cover; the thermocouple sensing device is arranged on the base, and the head of the thermocouple sensing device is close to the fire outlet hole of the central fire cover; the flame detection device is arranged below the outer ring fire cover.

3. The gas range of claim 2, further comprising an ignition needle disposed on the base and connected to the controller.

4. Gas burner according to any of the claims 1 to 3, characterized in that the flame detection means is a light-sensitive sensor.

5. The gas range as set forth in any one of claims 1 to 3, wherein the flame detection means is provided on the burner opposite to the thermocouple sensing means.

6. The control method of the gas stove is characterized in that the gas stove comprises a thermocouple sensing device, a flame detection device, an electromagnetic valve and a controller, wherein the controller is connected with the electromagnetic valve; the thermocouple sensing device is arranged on a burner of the gas stove and is connected with the electromagnetic valve; the flame detection device is arranged on a burner of the gas stove and connected with the controller; the control method comprises the following steps:

acquiring an electric signal of the thermocouple sensing device;

when the electric signal is smaller than a preset threshold value, acquiring a detection signal of the flame detection device;

judging whether flame exists in the gas stove or not according to the detection signal;

and when flame exists in the gas stove, providing a valve maintenance signal for maintaining the opening state for the electromagnetic valve.

7. The method of claim 6, further comprising, after providing the wife valve signal to maintain the open state for the solenoid valve:

judging whether the electric signal of the thermocouple sensing device is recovered to be normal within a first preset time;

if yes, stopping providing the dimensional valve signal;

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

8. The method as claimed in claim 6, wherein when the gas range further includes an ignition needle provided on the burner and connected to the controller, the control method of the gas range further includes:

and when no flame exists in the gas stove, controlling the ignition needle to ignite again.

9. The control method according to claim 8, characterized by, after controlling the ignition needle to re-ignite, comprising:

and when the ignition is not successful within the preset ignition frequency/second preset time, controlling the electromagnetic valve to be closed.

10. The control method according to claim 6 or 8, characterized by further comprising, after controlling the electromagnetic valve to close:

and sending an alarm prompt message.

11. A control device of a gas range, comprising:

the first acquisition module is used for acquiring an electric signal of the thermocouple sensing device;

the second acquisition module is used for acquiring a detection signal of the flame detection device when the electric signal is smaller than a preset threshold value;

the processing module is used for judging whether flame exists in the gas stove or not according to the detection signal;

the first control module is used for providing a valve maintenance signal for maintaining an opening state for the electromagnetic valve when flame exists in the gas stove.

12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions for causing the computer to execute a control method of a gas range according to any one of claims 6 to 10.

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