CN210568650U - Cooking utensil - Google Patents

Abstract

An embodiment of the utility model provides a cooking utensil, including the casing not only is provided with heating device, still is provided with induction system and extinguishing device on fire. The fire sensing device can sense the fire of the cooking appliance and send a fire extinguishing signal to the fire extinguishing device when the cooking appliance fires; extinguishing device can release fire extinguishing material according to the signal of putting out a fire of receiving to when cooking utensil is on fire, extinguishing device senses cooking utensil and goes on fire according to the induction system that goes on fire and sends the signal of putting out a fire to it, and release fire extinguishing material is in time put out a fire to cooking utensil, avoids the emergence of serious accidents such as conflagration.

Description

Cooking utensil

Technical Field

The embodiment of the utility model provides a relate to domestic appliance technical field, especially relate to a cooking utensil.

Background

At present, an induction cooker as a kitchen utensil has been introduced into thousands of households and gradually becomes a necessity of the families, and the working principle of the induction cooker is to convert electric energy into heat energy by utilizing the phenomenon of electromagnetic induction so as to heat a pot.

However, most of the materials used for manufacturing the induction cooker are non-flame retardant materials, and even if the induction cooker is made of flame retardant materials, due to the defect of strength, when the internal temperature of the induction cooker is too high or components are broken down, the induction cooker is easy to be ignited, so that the service time of the induction cooker is influenced, and even serious accidents such as fire disasters are caused.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a cooking utensil, when this cooking utensil is on fire, release fire extinguishing material makes the fire extinguish, avoids causing serious accidents such as conflagration.

The embodiment of the utility model provides a cooking appliance, which comprises a shell, wherein a heating device is arranged in the shell, and the cooking appliance is characterized in that a fire induction device and a fire extinguishing device are also arranged in the shell;

the fire sensing device is used for sensing the fire of the cooking appliance when the cooking appliance fires and sending a fire extinguishing signal to the fire extinguishing device;

and the fire extinguishing device is used for releasing fire extinguishing materials after receiving the fire extinguishing signal so as to extinguish the fire of the cooking appliance.

In some embodiments, the fire sensing device comprises: the fire extinguishing device comprises a fire sensing circuit and a main control chip, wherein the fire sensing circuit is connected with the main control chip, and the main control chip is connected with the fire extinguishing device;

the ignition induction circuit is used for inducing the ignition of the cooking utensil and sending an alarm signal to the main control chip when the cooking utensil is ignited;

and the main control chip is used for providing a fire extinguishing signal for the fire extinguishing device according to the alarm signal after receiving the alarm signal.

In some embodiments, the fire sensing circuit comprises: the first end of the induction signal generating circuit is connected with a power supply of the cooking utensil, the second end of the induction signal generating circuit is grounded, the first end of the induction circuit is connected with the power supply of the cooking utensil, and the second end of the induction circuit is connected with the main control chip and grounded;

the induction signal generating circuit is used for sending out an induction signal so that the induction signal is induced by the induction circuit;

the sensing circuit is used for sending an alarm signal to the main control chip according to the sensed sensing signal.

In some embodiments, the sensing signal comprises an optical signal, and the sensing signal generating circuit comprises: the first end of the light-emitting component is connected with a power supply of the cooking utensil, and the second end of the light-emitting component is grounded;

the sensing circuit includes: the first end of the photosensitive component is connected with the power supply of the cooking utensil, and the second end of the photosensitive component is connected with the main control chip and grounded;

the light-emitting component is used for emitting an optical signal so that the light-sensitive component can sense the optical signal;

and the photosensitive component is used for sending an alarm signal to the main control chip when the sensed intensity of the optical signal is smaller than the preset intensity.

In some embodiments, the fire suppression apparatus comprises: the sealing box is divided into a first sub-sealing space and a second sub-sealing space by the partition plate; a first substance is placed in the first sub-sealed space, and a second substance is placed in the second sub-sealed space;

the first end of the isolation plate is connected with the main control chip, and the second end of the isolation plate is grounded;

the isolation plate is used for deforming when receiving a fire extinguishing signal so as to enable the first sub-sealed space and the second sub-sealed space to be communicated, so that a chemical reaction is generated between the first substance and the second substance to generate the fire extinguishing material, and the sealed box is expanded to be opened to release the fire extinguishing material.

In some embodiments, the first substance is a basic chemical and the second substance is an acidic chemical.

In some embodiments, a cut-off control device is further arranged in the shell and is connected with the heating device;

the fire induction device is also used for sending a control signal to the cut-off control device when the fire of the cooking appliance is induced;

and the cut-off control device is used for cutting off a power supply circuit in the heating device after receiving the control signal.

In some embodiments, the shut-off control device includes: the ignition induction device comprises a conduction control circuit and a cut-off circuit, wherein the conduction control circuit is connected with the ignition induction device and the cut-off circuit, and the cut-off circuit is also connected with the heating device;

the conduction control circuit is used for converting a disconnection state into a conduction state according to the control signal;

and the cutting-off circuit is used for cutting off the power supply circuit in the heating device after the conduction control circuit is conducted.

In some embodiments, the conduction control circuit includes: a controllable element connected to the fire sensing device and the disconnect circuit;

and the controllable element is used for converting the off state into the on state after receiving the control signal.

In some embodiments, the cutoff circuit comprises: a relay connected between the controllable element and a power supply circuit in the heating device;

and the relay is used for cutting off a power supply circuit in the heating device when the conduction control circuit is conducted.

The embodiment of the utility model provides a cooking utensil, through setting up on fire induction system and extinguishing device in the casing of cooking utensil, wherein, on fire induction system can sense cooking utensil on fire, and send the fire extinguishing signal to the extinguishing device when cooking utensil on fire; extinguishing device can release fire extinguishing material according to the signal of putting out a fire of receiving to when cooking utensil is on fire, extinguishing device senses cooking utensil and goes on fire according to the induction system that goes on fire and sends the signal of putting out a fire to it, and release fire extinguishing material is in time put out a fire to cooking utensil, avoids the emergence of serious accidents such as conflagration.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a cooking appliance according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a fire extinguishing apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a cooking appliance according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cooking appliance according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In addition, in the present invention, unless otherwise explicitly specified or limited, the terms "connected" and the like are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection; the term "connected" refers to a direct connection or an indirect connection through an intermediate medium, and refers to a connection between two elements or an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present invention is understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic structural diagram of a cooking appliance according to an embodiment of the present invention. It should be noted that the embodiments of the present invention do not limit the type of the cooking appliance, for example, an induction cooker, an electric cooker, and the like. As shown in fig. 1, the present embodiment provides a cooking appliance including a case in which not only a heating device but also a fire sensing device 100 and a fire extinguishing device 200 are provided. Wherein,

the fire sensing device 100 is used for sensing that the cooking utensil is on fire when the cooking utensil is on fire, and sending a fire extinguishing signal to the fire extinguishing device 200;

the fire extinguishing device 200 is used for releasing fire extinguishing materials after receiving the fire extinguishing signal so as to extinguish the fire of the cooking appliance.

In this embodiment, the sensing device 100 and the fire extinguishing device 200 are disposed in the housing of the cooking appliance, and therefore, the sensing device 100 can sense the fire of the cooking appliance when the cooking appliance fires due to a short circuit or an excessive temperature, thereby generating a fire extinguishing signal capable of controlling the fire extinguishing device 200 and transmitting the fire extinguishing signal to the fire extinguishing device 200. After receiving the fire extinguishing signal, the fire extinguishing device 200 releases the fire extinguishing material according to the fire extinguishing signal, thereby extinguishing the fire of the cooking appliance. For example, the sensing device 100 may be a temperature sensor for detecting the temperature inside the housing, and the temperature sensor converts the temperature into an electrical signal (i.e., a fire extinguishing signal) when the temperature rises to a preset temperature due to a fire in the cooking appliance, or the sensing device 100 may be a smoke alarm for emitting an electrical signal when the smoke concentration inside the housing reaches a preset concentration. The fire extinguishing apparatus 200 is a sealed case controlled by an electric signal, and the sealed case is opened when the fire extinguishing apparatus 200 has the electric signal. When cooking utensil is on fire, the temperature in the casing risees, and when the temperature rose to preset temperature, temperature sensor sent extinguishing device 100 with temperature conversion signal to signal of telecommunication (promptly the signal of putting out a fire), and extinguishing device 100 is after receiving the signal of telecommunication, and sealed casing is opened to release inside fire extinguishing material. As another example, the sensing device 100 is coupled between the fire suppression device 200 and a power source in an unconnected relationship to at least one of the fire suppression device 200 and the power source. Wherein, this power is used for providing the electric energy for extinguishing device 200, distinguishes in the power that provides the electric energy for heating device, the embodiment of the utility model provides an in, will be called first power with the power the same for extinguishing device 200 provides the power of electric energy, mark as the VCC, first power and all pass through cooking utensil's power circular telegram for heating device provides the power of electric energy. The sensing device 100 is made of a conductive material with the property of volume increase along with temperature rise, when the temperature in the shell rises due to fire of the cooking appliance, the volume of the sensing device 100 is increased, so that a loop can be formed with the fire extinguishing device 200 and a power supply, and after the fire extinguishing device 100 receives an electric signal, the sealed shell is opened to release the internal fire extinguishing material.

In this embodiment, at least one fire extinguishing device 200 may be provided, and the fire extinguishing devices 200 may be connected in parallel, for example, so that each fire extinguishing device 200 releases the fire extinguishing material therein when the cooking appliance is on fire, thereby increasing the speed of fire extinguishing.

In the embodiment, the fire induction device and the fire extinguishing device are arranged in the shell of the cooking appliance, wherein the fire induction device can induce the fire of the cooking appliance and send a fire extinguishing signal to the fire extinguishing device when the cooking appliance fires; extinguishing device can release fire extinguishing material according to the signal of putting out a fire of receiving to when cooking utensil is on fire, extinguishing device senses cooking utensil and goes on fire according to the induction system that goes on fire and sends the signal of putting out a fire to it, and release fire extinguishing material is in time put out a fire to cooking utensil, avoids the emergence of serious accidents such as conflagration.

In some embodiments, with continued reference to fig. 1, a shut-off control device 300 is also disposed within the housing, the shut-off control device 300 being coupled to the heating device.

The fire induction device 100 is further configured to send a control signal to the cut-off control device when a fire is induced in the cooking appliance;

the cutting control device 300 is configured to cut off the power supply circuit a0 in the heating device after receiving the control signal, so as to stop heating the cooking appliance.

In the present embodiment, the cut-off control device 300 is provided in the case, and the cut-off control device 300 is connected to the heating device of the cooking appliance, specifically, the cut-off control device 300 is connected to the power supply circuit a0 of the heating device, so that when the cooking appliance is on fire, the cut-off control device 300 controls the power supply circuit a0 of the heating device to stop heating of the heating device.

In the embodiment, on the basis that the fire induction device and the fire extinguishing device are arranged in the shell of the cooking appliance, the cut-off control device is arranged and is controlled by the fire induction device, namely, the fire induction device induces the fire of the cooking appliance and sends a control signal to the fire induction device, and the cut-off control device cuts off the power supply circuit A0 in the heating device according to the control signal, so that the safety of the cooking appliance is improved.

In some embodiments, as shown in fig. 1, the fire sensing device 100 includes: the fire extinguishing device comprises a fire sensing circuit 110 and a main control chip 120, wherein the fire sensing circuit 110 is connected with the main control chip 120, and the main control chip 120 is connected with the fire extinguishing device 200.

The fire sensing circuit 110 is configured to sense that a cooking appliance is on fire, and send an alarm signal to the main control chip 120 when the cooking appliance is on fire;

the main control chip 120 is configured to provide a fire extinguishing signal to the fire extinguishing apparatus 200 according to the alarm signal after receiving the alarm signal.

In this embodiment, the power supply of the fire sensing circuit 110 is a first power supply, and the fire sensing circuit 110 is connected to the first pin of the main control chip 120, the second pin of the main control chip 120 is connected to the fire extinguishing device 200, and the fire sensing circuit 110 can sense whether the cooking utensil is on fire or not, and send an alarm signal to the main control chip 120 when sensing the cooking utensil. After the first pin of the main control chip 120 receives the alarm signal, the main control chip 120 provides a fire extinguishing signal to the fire extinguishing apparatus 200 through the second pin according to the alarm signal. For example, the alarm signal is a high level signal, under a normal condition, the first pin of the fire sensing circuit 110 and the first pin of the main control chip 120 are in a normally off state, the first pin of the main control chip 120 is a low level signal, when the cooking appliance fires, the fire sensing circuit 110 is conducted with the first pin of the main control chip 120, the fire sensing circuit 110 sends the high level signal to the first pin of the main control chip 120, and the main control chip 120 provides the fire extinguishing signal to the fire extinguishing device 200 according to the high level signal. Or, the alarm signal is a low level signal, under a normal condition, the fire sensing circuit 110 is connected to the first pin of the main control chip 120, the first pin of the main control chip 120 is a high level signal, when the cooking appliance fires, the fire sensing circuit 110 is disconnected from the first pin of the main control chip 120, at this time, the first pin of the main control chip 120 becomes a low level signal, and the main control chip 120 provides the fire extinguishing signal to the fire extinguishing device 200 according to the low level signal.

It should be noted that, at least one fire sensing circuit 110 may be disposed in the fire sensing device 100, when more than two fire sensing circuits 110 are disposed, each fire sensing circuit 110 is connected to the main control chip 120 through, for example, different pins of the main control chip 120, and as long as one pin receives an alarm signal, it indicates that the cooking appliance is on fire, so that the main control chip 120 controls the fire extinguishing device 200 to extinguish the fire and the cut-off control device 300 cuts off the power supply circuit a0 in the heating device.

This embodiment, through setting up induction system on fire to induction circuit on fire and main control chip, make main control chip be connected with induction circuit on fire, extinguishing device respectively, whether response cooking utensil is on fire through induction circuit on fire to send alarm signal to main control chip when cooking utensil is on fire, thereby make main control chip provide fire extinguishing signal to extinguishing device 200. Can in time sense cooking utensil when cooking utensil is on fire and on fire to in time put out a fire, avoid the conflagration to take place, improve cooking utensil's security performance.

In some embodiments, as shown in fig. 2, the fire suppression apparatus 200 includes: a partition plate 210 and a sealed box 220, wherein the partition plate 210 partitions the sealed box into a first sub-sealed space 221 and a second sub-sealed space 222; a first substance M1 is placed in the first sub-sealed space 221, and a second substance M2 is placed in the second sub-sealed space 222;

a first end of the isolation plate 210 is connected to the main control chip 120, and a second end of the isolation plate 210 is grounded;

the isolation plate 210 is configured to deform when receiving a fire extinguishing signal to make the first sub-sealed space 221 and the second sub-sealed space 222 communicate, so that a chemical reaction occurs between the first substance M1 and the second substance M2 to generate the fire extinguishing material and to expand the sealed box 220 to be opened, and the fire extinguishing material is released.

In the fire extinguishing apparatus 200 of the present embodiment, the sealing box 220 is partitioned by the partition plate 210 into two non-penetrating sub-sealed spaces, i.e., the first sealed space 221 and the second sealed space 222, the first substance M1 is placed in the first sealed space 221, and the second substance M2 is placed in the second sealed space 222. The first substance M1 and the second substance M2 may be, for example, substances that react chemically to generate a fire extinguishing material and generate a gas when they are contacted with each other. One end of the isolation board 210 may be connected to a second pin of the main control chip 120 through a wire L, and the other end is grounded. Therefore, the main control chip 120 may send a fire extinguishing signal to the isolation board 210 through the second pin, and after receiving the fire extinguishing signal, the isolation board 210 deforms, for example, reduces in volume, so that the first sealed space 221 and the second sub-sealed space 222 are communicated, and thus the first substance M1 and the second substance M2 respectively placed in the first sealed space 221 and the second sub-sealed space 222 are in contact with each other to perform a chemical reaction, so as to generate a fire extinguishing material. Also, the first substance M1 and the second substance M2 chemically react to generate gas, so that the capsule 220 is opened by the increase of the internal pressure, thereby releasing the fire extinguishing material. Wherein the generated gas may also be a fire extinguishing material, e.g. carbon dioxide gas. It is understood that the purpose of opening the sealed box 220 is to release the fire extinguishing material, and therefore, it is within the scope of the present invention to adopt other opening methods for the sealed box 220 to release the fire extinguishing material, for example, the sealed box 220 may release the fire extinguishing material when a small explosion occurs. In some embodiments, for example, the first substance M1 is a basic chemical and the second substance is an acidic chemical. After the alkaline chemical and the acidic chemical are chemically reacted, water and salt, or water, salt and gas, for example, are generated according to the alkaline chemical and the acidic chemical. The first substance M1 and the second substance M2 in this embodiment are substances that can generate fire extinguishing materials, for example, the first substance M1 is sodium bicarbonate, the second substance M2 is acetic acid, and the two substances react to generate water, carbon dioxide gas and sodium acetate. The carbon dioxide gas is expanded and opened by the sealing box, and water and the carbon dioxide gas are released to extinguish the fire.

In the present embodiment, the isolation plate 210 may be made of a material having properties similar to those of a material for making a fuse, for example, and may itself melt to cut off current when the current thereof rises to a certain height and heat. Therefore, when there is no fire, no current flows through the isolation board 210, i.e., the voltage of the second pin of the main control chip 120 is 0; when cooking utensil is on fire, the sensing circuit 110 on fire sends alarm signal to main control chip 120, and main control chip 120 makes voltage have on the second pin according to alarm signal to provide the signal of putting out a fire for division board 210 through the second pin, at this moment, this signal of putting out a fire is high level signal. Since the isolation board 210 is grounded, the main control chip 120 and the isolation board 210 form a loop, and the isolation board 210 is fused to penetrate the first sealed space 221 and the second sealed space 222.

It should be noted that fig. 2 only shows one structure of the fire extinguishing apparatus 200, and in practical use, the fire extinguishing apparatus 200 may be designed according to practical needs, which is not limited by the embodiment of the present invention. For example, the sealed cartridge 220 of the fire suppression apparatus 200 may be other shapes, such as circular. For example, the two isolation plates 210 can be used to isolate the sealing box 220 into 3 sub-sealed spaces for respectively containing 3 substances, and when the cooking appliance is on fire, the two isolation plates 210 deform to make the 3 substances contact and react chemically, thereby extinguishing the fire.

This embodiment, through being designed fire extinguishing apparatus for division board and seal box, utilize the division board to keep apart the seal box and be first sub-confined space and second sub-confined space, and make the division board can take place deformation after receiving the signal of putting out a fire, thereby make the first material M1 and the second material M2 contact of placing respectively in first confined space and second sub-confined space take place chemical reaction, produce fire extinguishing material and make the seal box inflation open, release fire extinguishing material, thereby extinguish fire, avoid taking place accidents such as conflagration, improve cooking utensil's security.

Fig. 3 is a schematic structural diagram of a cooking appliance according to another embodiment of the present invention. As shown in fig. 3, the fire sensing circuit 110 includes: the first end of the sensing signal generating circuit 111 is connected with the power supply of the cooking appliance, the second end of the sensing signal generating circuit 111 is grounded, the first end of the sensing circuit 112 is connected with the power supply of the cooking appliance, and the second end of the sensing circuit 112 is connected with the main control chip 120 and grounded;

the sensing signal generating circuit 111 is configured to send a sensing signal, so that the sensing circuit 112 senses the sensing signal;

the sensing circuit 112 is configured to send an alarm signal to the main control chip 120 according to the sensed sensing signal.

In this embodiment, the sensing signal generating circuit 111 and the sensing circuit 112 may be connected or not connected. For example, the first end of the sensing signal generating circuit 111 is connected to a first power supply in the cooking appliance, when the cooking appliance is not on fire, the sensing signal generating circuit 111 and the sensing circuit 112 are always connected, the first power supply supplies power to the sensing circuit 112 through the sensing signal generating circuit 111, and at this time, the first pin of the main control chip 120 is at a high level; when the cooking appliance is on fire, the sensing signal generating circuit 111 and the sensing circuit 112 are disconnected, that is, the sensing signal generating circuit 111 sends out a sensing signal, and since the second end of the sensing signal generating circuit 111 is grounded, the first power supply, the sensing signal generating circuit 111 and the ground form a loop, at this time, the sensing circuit 112 is not powered on, and the first pin of the control chip 120 is changed from a high level to a low level (i.e., an alarm signal). For another example, when the cooking appliance is not on fire, the sensing signal generating circuit 111 and the sensing circuit 112 are not connected, the sensing signal generating circuit 111 and the sensing circuit 112 are respectively powered by the first power supply and are not turned on, and at this time, the first pin of the main control chip 120 is at a low level; when the cooking appliance is on fire, the sensing signal generating circuit 111 is conducted to generate a magnetic field, and the sensing circuit 112 is conducted under the action of the magnetic field, so that the first pin of the main control chip 120 has a low level and is converted into a high level (namely, an alarm signal), and at the moment, the sensing signal is a magnetic signal.

This embodiment, set up sensing signal production circuit and sensing circuit in the induction circuit that fires, it fires to produce circuit response cooking utensil through sensing signal, and when cooking utensil is on fire, send sensing signal, behind the sensing signal that sensing circuit sensed, send alarm signal to main control chip, so that main control chip sends the signal of putting out a fire to extinguishing device according to alarm signal, and send control signal to cutting off control device, thereby put out a fire and in order to cut off heating device's supply circuit A0, avoid causing serious accidents such as conflagration.

In some embodiments, with continued reference to fig. 3, the cut-off control apparatus 300 includes: a conduction control circuit 310 and a cutoff circuit 320, wherein the conduction control circuit 310 is connected with the fire induction device 100 and the cutoff circuit 320, and the cutoff circuit 320 is also connected with the heating device;

the on-control circuit 310 is configured to switch from an off state to an on state according to the control signal;

the disconnection circuit 320 is configured to disconnect the power supply circuit a0 in the heating apparatus after the conduction control circuit is turned on.

In this embodiment, the cut-off control device 300 includes a conduction control circuit 310 and a cut-off circuit 320, the conduction control circuit 310 is powered by a first power source, and the conduction control circuit 310 is connected to the fire sensing device 100, so that the fire sensing device 100 provides a control signal, and more specifically, the conduction control circuit 310 is connected to a third pin of the main control chip 120. The on control circuit 310 is also connected to the disconnecting circuit 320, and the disconnecting circuit 320 is connected to the power supply circuit a0 in the heating apparatus, so that when the on control circuit 310 is turned on in response to a control signal, the disconnecting circuit 320 can disconnect the power supply circuit a0 in the heating apparatus. For example, the cut-off circuit 320 includes an air switch, the air switch is connected in series to the power supply circuit a0 in the heating device, when the cooking appliance is not on fire, the air switch is turned on, and the heating device is normally heated; when the cooking appliance is on fire and the on control circuit 310 is turned on, the first power supply supplies power to the off circuit 320, so that the current flowing through the air switch is increased, the air switch is turned off, and the power supply circuit a0 in the heating device is turned off.

In this embodiment, the cutoff control device includes an on control circuit and a cutoff circuit, and the on control circuit is connected to the ignition sensing device and the cutoff circuit, and the cutoff circuit is also connected to the heating device, so that when the cooking utensil is ignited, the on control circuit is turned on by a control signal transmitted from the ignition sensing device, and the cutoff circuit cuts off the power supply circuit a0 in the heating device. Thereby, when the cooking appliance is on fire, the power supply circuit A0 for heating is cut off in time, and more serious accidents, such as explosion and fire, are avoided.

Fig. 4 is a schematic structural diagram of a cooking appliance according to another embodiment of the present invention. In this embodiment, the sensing signal generated by the sensing signal generating circuit 111 is taken as an example of an optical signal. As shown in fig. 4, fig. 4 is a specific embodiment, when the sensing signal is an optical signal, based on the above embodiment, the sensing signal generating circuit 111 includes: a light-emitting component 1111, wherein a first end of the light-emitting component 1111 is connected with a power supply of the cooking utensil, and a second end of the light-emitting component 1111 is grounded;

accordingly, the sensing circuit 112 includes: a light sensing component 1121, wherein a first end of the light sensing component 1121 is connected with a power supply of the cooking appliance, and a second end of the light sensing component 1121 is connected with the main control chip 120 and is grounded;

the light emitting component 1111 is configured to emit an optical signal, so that the light sensing component 1121 senses the optical signal;

the photosensitive component 1121 is configured to send an alarm signal to the main control chip 120 when the sensed intensity of the optical signal is smaller than a preset intensity.

In this embodiment, when the sensing signal is an optical signal, the photosensitive component 1121 is installed at a position where the photosensitive component 1111 can sense the optical signal emitted by the light-emitting component 1111, and at this time, the sensing signal generating circuit 111 and the sensing circuit 112 may be independent circuits. In the sensing signal generating circuit 111, one end of the light emitting element 1111 is connected to a first power supply in the cooking appliance through the resistor R1, the other end is grounded, and the sensing signal generating circuit 111 is in a normally on state, so that the light emitting element 1111 can always emit a light signal. In the sensing circuit 112, one end of the photosensitive component 1121 is connected to the first power supply through the resistor R2, and the other end of the photosensitive component 1121 is not only connected to the first pin of the main control chip 120, but also grounded through the resistor R3, when the cooking appliance is not on fire, the light signal sensed by the photosensitive component 1121 is slightly greater than or equal to the preset intensity, and at this time, the photosensitive component 1121 is in a conducting state, so that the first pin of the main control chip 120 is at a high level. When cooking utensil is on fire, because can produce smog after on fire, lead to the light signal intensity that photosensitive components 1121 sensed to reduce, when the light signal intensity that photosensitive components 1121 sensed is less than predetermineeing intensity, photosensitive components 1121 ends, because the one end that photosensitive components 1121 and main control chip 120's first pin are connected still ground connection, at this moment, main control chip 120's first pin has the high level to become the low level, sends alarm signal to main control chip 120 through first pin promptly.

After the first pin of the main control chip 120 receives the alarm signal, the fire extinguishing signal is sent to the fire extinguishing apparatus 200 through the second pin, so that the fire extinguishing apparatus 200 releases the fire extinguishing material. Further, a control signal may be transmitted to the disconnection control device 300 through the third pin, so that the disconnection control device 300 disconnects the power supply circuit a0 in the heating device. So that the fire extinguishing apparatus 200 can extinguish a fire in time and cut off the power supply circuit a0 in the heating apparatus when the cooking appliance is on fire.

This embodiment, through set up light emitting component in the sensing signal production circuit and set up sensitization components and parts at sensing circuit, can in time sense cooking utensil when on fire, and the cooking utensil is on fire and sends alarm signal to main control chip to make main control chip control extinguishing device in time put out a fire, and the control cuts off the power supply circuit among the controlling means in time cuts off heating device, avoids the intensity of a fire to add the weight, improves cooking utensil's security.

In some embodiments, with continued reference to fig. 4, the conduction control circuit 310 includes: a controllable element 311, the controllable element 311 being connected to the fire sensing device 100 and the cut-off circuit 320;

the controllable element 311 is configured to switch from an off state to an on state after receiving the control signal.

In this embodiment, the turn-on control circuit 310 includes a controllable element 311, and the turn-on and turn-off of the turn-on control circuit 310 are controlled by the controllable element 311, wherein a control terminal of the controllable element 311 is connected to the fire sensing device 100, specifically, the control terminal of the controllable element 311 is connected to the third pin of the main control chip 120, and an output terminal of the controllable element 311 is connected to the cut-off circuit 320, so that the cut-off circuit 320 cuts off the power supply circuit a0 in the heating device after the turn-on control circuit 310 is turned on. Specifically, the present embodiment is described by taking the controllable element 311 as an NPN transistor Q1 as an example.

When the base of the Q1 is connected to the third pin of the main control chip 120 through the resistor R4, the collector is connected to the first power source, and the emitter is connected to the cut-off circuit 320, the main control chip 120 can send a control signal to the base of the Q1 through the third pin, wherein in this embodiment, the control signal is a high level signal. When the base of Q1 receives the control signal, Q1 turns from off to on, and the current flows through the cutoff circuit 320, thereby cutting off the power supply circuit a0 in the heating device.

In this embodiment, the controllable element controls the on/off of the on control circuit, and the controllable element is connected to the main control chip, so that after the main control chip receives the alarm signal, the on/off of the controllable element can be controlled, and the on/off of the on control circuit is further controlled. When the on control circuit is turned on, the current flows through the cutoff circuit 320, and therefore, the cutoff circuit 320 can cut off the power supply circuit a0 in the heating apparatus. Therefore, when the cooking appliance is on fire, the controllable element is controlled through the main control chip, so that the fire can be extinguished in time, the power supply circuit A0 in the heating device can be cut off in time, and the safety performance of the cooking appliance is improved.

In some embodiments, with continued reference to fig. 4, the cutoff circuit 320 includes: a relay 321, said relay 321 being connected between said controllable element 311 and a supply circuit a0 in said heating device;

the relay 321 is configured to disconnect the power supply circuit a0 in the heating apparatus when the conduction control circuit is turned on.

In the present embodiment, the relay 321 is included in the disconnection circuit 320, and as shown in fig. 4, one end of the electromagnetic conversion module of the relay 321 is connected to the emitter of Q1, and the other end is grounded through the resistor R5; the switch K1 of the relay 321 has a first end fixedly connected to the first contact a, and a second end respectively connected to the second contact b and the third contact c, wherein the first contact a and the second contact b are connected to the power supply circuit a0 in the heating device, and the third contact c is, for example, in a floating state. When the cooking appliance is not on fire, i.e., when Q1 is not conducting, the cut-off circuit 320 is not energized, and at this time, the second terminal of the switch K1 is connected to the second contact b, so that the first contact a and the second contact b are in a conducting state. Therefore, the power supply circuit a0 in the heating device can be normally heated when the cooking appliance is not on fire. When the cooking appliance is on fire, the Q1 is switched on, the first power supply supplies power to the cut-off circuit 320, the electromagnetic conversion module of the relay 321 generates magnetic force, the second end of the K1 is switched from being connected with the second contact b to being connected with the third contact c, and therefore the first contact a and the second contact b are disconnected, and the purpose of cutting off the power supply circuit A0 in the heating device is achieved.

In the embodiment shown in fig. 4, the values of the resistor R1, the resistor R2, the resistor R3, the resistor R4, and the resistor R5 may be values according to actual situations, and the embodiment is not limited to this.

It should be noted that, as shown in fig. 4, AN IGBT is disposed in the power supply circuit a0 in the heating device, wherein a base of the IGBT is connected to the fourth pin of the main control chip 120 (i.e., the S1 terminal of the power supply circuit a0 in the heating device in fig. 4 is connected to the pin "PA 0/AN 0" on the main control chip 120). When the cooking appliance is not on fire, the main control chip 120 switches to output high and low levels through the pin 'PA 0/AN 0' to enable the IGBT to be switched on or off; when the cooking appliance is on fire, after the main control chip 120 receives the alarm signal, the pin 'PA 0/AN 0' continuously outputs low level, so that the IGBT is in a cut-off state, and the power supply circuit a0 in the heating device is disconnected. In practical use, the main control chip 120 may, for example, send a control signal to the on-control circuit 310, so that the cut-off circuit 320 cuts off the power supply circuit a0 in the heating device, and/or continuously outputs a low level through the pin "PA 0/AN 0" to make the IGBT in AN off state, thereby disconnecting the power supply circuit a0 in the heating device.

It should be noted that, the circuit structure of the power supply circuit a0 and the main control chip 120 in the heating device shown in fig. 4 may also adopt other structures, which is not limited in the embodiment of the present invention.

In the present embodiment, the relay is used in the cutoff circuit to normally heat the heating device when the cooking appliance is not on fire, and the power supply circuit a0 in the heating device is automatically cut off when the cooking appliance is on fire. Therefore, when the cooking appliance is on fire, the power supply circuit A0 in the heating device is cut off in time, more serious accidents are prevented, and the safety is improved.

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

Claims (10)

1. A cooking appliance, comprising a shell, wherein a heating device is arranged in the shell, and is characterized in that a fire induction device (100) and a fire extinguishing device (200) are also arranged in the shell;

the fire sensing device (100) is used for sensing the fire of the cooking appliance when the cooking appliance fires and sending a fire extinguishing signal to the fire extinguishing device (200);

the fire extinguishing device (200) is used for releasing fire extinguishing materials after receiving the fire extinguishing signal so as to extinguish the fire of the cooking appliance.

2. The cooking appliance according to claim 1, wherein the fire sensing device (100) comprises: the fire extinguishing device comprises a fire induction circuit (110) and a main control chip (120), wherein the fire induction circuit (110) is connected with the main control chip (120), and the main control chip (120) is connected with the fire extinguishing device (200);

the ignition induction circuit (110) is used for inducing the ignition of a cooking appliance and sending an alarm signal to the main control chip when the cooking appliance is ignited;

and the main control chip (120) is used for providing a fire extinguishing signal for the fire extinguishing device according to the alarm signal after receiving the alarm signal.

3. The cooking appliance according to claim 2, wherein the fire sensing circuit (110) comprises: the induction signal generating circuit (111) and the induction circuit (112), wherein a first end of the induction signal generating circuit (111) is connected with a power supply of the cooking appliance, a second end of the induction signal generating circuit (111) is grounded, a first end of the induction circuit (112) is connected with the power supply of the cooking appliance, and a second end of the induction circuit (112) is connected with the main control chip (120) and grounded;

the sensing signal generating circuit (111) is used for sending out a sensing signal so that the sensing circuit (112) senses the sensing signal;

the sensing circuit (112) is used for sending an alarm signal to the main control chip (120) according to the sensed sensing signal.

4. The cooking appliance according to claim 3, wherein the sensing signal comprises a light signal, and the sensing signal generating circuit (111) comprises: a light-emitting component (1111), wherein a first end of the light-emitting component (1111) is connected with a power supply of the cooking utensil, and a second end of the light-emitting component (1111) is grounded;

the sensing circuit (112) comprises: a first end of the photosensitive component (1121) is connected with a power supply of the cooking utensil, and a second end of the photosensitive component (1121) is connected with the main control chip (120) and is grounded;

the light-emitting component (1111) is used for emitting an optical signal so that the light-sensing component (1121) senses the optical signal;

the photosensitive component (1121) is used for sending an alarm signal to the main control chip (120) when the sensed intensity of the optical signal is smaller than a preset intensity.

5. The cooking appliance according to claim 3, wherein the fire extinguishing device (200) comprises: a partition plate (210) and a sealing box (220), wherein the partition plate (210) partitions the sealing box (220) into a first sub-sealed space (221) and a second sub-sealed space (222); a first substance (M1) is placed in the first sub-sealed space (221), and a second substance (M2) is placed in the second sub-sealed space (222);

the first end of the isolation plate (210) is connected with the main control chip (120), and the second end of the isolation plate (210) is grounded;

the isolation plate (210) is used for being deformed when receiving a fire extinguishing signal so as to enable the first sub-sealed space (221) and the second sub-sealed space (222) to be communicated, so that a chemical reaction is generated between the first substance (M1) and the second substance (M2) to generate the fire extinguishing material, and the sealed box (220) is expanded and opened to release the fire extinguishing material.

6. The cooking appliance according to claim 5, wherein the first substance (M1) is an alkaline chemical and the second substance (M2) is an acidic chemical.

7. The cooking appliance according to any one of claims 1 to 6, wherein a cut-off control device (300) is further provided in the housing, the cut-off control device (300) being connected to the heating device;

the fire induction device (100) is also used for sending a control signal to the cut-off control device (300) when the fire of the cooking utensil is induced;

the cut-off control device (300) is used for cutting off a power supply circuit (A0) in the heating device after receiving the control signal.

8. The cooking appliance according to claim 7, wherein the cut-off control means (300) comprises: a conduction control circuit (310) and a cut-off circuit (320), wherein the conduction control circuit (310) is connected with the fire induction device (100) and the cut-off circuit (320), and the cut-off circuit (320) is also connected with the heating device;

the conduction control circuit (310) is used for converting from an off state to an on state according to the control signal;

the disconnection circuit (320) is configured to disconnect a power supply circuit (A0) in the heating device after the conduction control circuit (310) is turned on.

9. The cooking appliance according to claim 8, wherein the conduction control circuit (310) comprises: a controllable element (311), the controllable element (311) being connected to the fire sensing device (100) and the cut-off circuit (320);

the controllable element (311) is used for being switched from an off state to an on state after receiving the control signal.

10. The cooking appliance according to claim 9, wherein the cut-off circuit (320) comprises: a relay (321), the relay (321) being connected between the controllable element (311) and a power supply circuit (A0) in the heating device;

the relay (321) is used for cutting off a power supply circuit (A0) in the heating device when the conduction control circuit (310) is conducted.

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