Anti-overflow device of electric cooker and electric cooker

Abstract

The utility model relates to an electric rice cooker anti-overflow device and an electric rice cooker, the anti-overflow device comprises a temperature detection circuit used for detecting the top temperature of an inner pot of the electric rice cooker and generating a periodic driving signal after the top temperature reaches a second preset temperature; the driving circuit is used for generating periodic pot detection current under the action of the periodic driving signal; the resonance circuit is used for generating a periodic instant electromagnetic pulse under the periodic pot detection current; wherein the periodic pot detection current and the periodic instant electromagnetic pulse are used for enabling the inner pot of the electric rice cooker to generate vibration, so that bubbles in the inner pot of the electric rice cooker are broken. According to the utility model, the risk of overflow can be reduced, and the temperature of the inner pot can be more uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of household appliances, especially to an electric rice cooker anti-overflow device and an electric rice cooker. BACKGROUND

[0002] An electric rice cooker is a common kitchen appliance, which makes rice fully absorb moisture and starch gelatinization through heating, so as to achieve the purpose of cooking. The heating control technology of the electric rice cooker is to ensure the cooking effect of rice by controlling the heating power and heating time of the electric rice cooker.

[0003] During the heating process of the electric rice cooker, the rice may not be evenly cooked or may overflow. In the prior art, in order to solve the problems of long cooking time and uneven cooking, the method of increasing the heating power is usually adopted. However, simply increasing the heating power may cause the overflow problem of the electric rice cooker to be more serious.

[0004] It can be seen that the method in the prior art still cannot solve the overflow problem of the electric rice cooker while ensuring the cooking effect of the electric rice cooker. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides an electric rice cooker anti-overflow method, device and electric rice cooker.

[0006] In a first aspect, the utility model provides an electric rice cooker anti-overflow device, which comprises:

[0007] A temperature detection circuit is configured to detect the temperature of the top of the inner pot of the electric rice cooker and generate a periodic driving signal when the temperature of the top reaches a second preset temperature.

[0008] A driving circuit is configured to generate a periodic pot detection current under the action of the periodic driving signal.

[0009] A resonance circuit is configured to generate a periodic instantaneous electromagnetic pulse under the action of the periodic pot detection current.

[0010] The periodic pot detection current and the periodic instantaneous electromagnetic pulse are configured to make the inner pot of the electric rice cooker vibrate to break the bubbles in the inner pot of the electric rice cooker.

[0011] Optionally, the periodic pot detection current and the periodic instantaneous electromagnetic pulse are also configured to heat the food in the inner pot of the electric rice cooker.

[0012] Optionally, the resonance circuit comprises:

[0013] An inductor coil is connected to the driving circuit and configured to receive the periodic pot detection current.

[0014] a resonance capacitor, a first end of which is connected to the first end of the inductor coil, and a second end of which is connected to the second end of the inductor coil;

[0015] The inductor coil and the resonance capacitor form a resonance circuit, and the resonance circuit is configured to generate the periodic transient electromagnetic pulse according to the periodic detection current.

[0016] Optionally, the inductor coil comprises a bottom coil and a side coil, and the length of the bottom coil is greater than the length of the side coil.

[0017] The bottom coil is a multi-layer wire component, each layer of the wire component is formed by winding a wire multiple times, and the multi-layer wire components are sequentially connected, and each layer of the wire component generates electromagnetic pulses in the same direction.

[0018] Optionally, the inner pot of the electric rice cooker is a multi-layer composite pot, and the outer layer or the inner layer of the multi-layer composite pot is a magnetic conductor.

[0019] Optionally, the inner pot of the electric rice cooker is a multi-layer composite pot, and the outer layer of the multi-layer composite pot is a stainless steel layer, and the inner layer is an aluminum pot body.

[0020] Optionally, the driving circuit comprises:

[0021] a first resistor, a first end of which is connected to the temperature detection circuit;

[0022] a second resistor, a second end of which is connected to the first end of the first resistor;

[0023] a first transistor, a base of which is connected to the second end of the first resistor, and an emitter of which is grounded;

[0024] a third resistor, a first end of which is connected to the base of the first transistor, and a second end of which is grounded;

[0025] a second transistor, a base of which is connected to the collector of the first transistor, and a collector of which is grounded;

[0026] a first capacitor, a first end of which is connected to the base of the second transistor, and a second end of which is grounded;

[0027] a fourth resistor, a first end of which is connected to the emitter of the second transistor;

[0028] a third transistor, a base of which is connected to the base of the second transistor;

[0029] a first diode, a negative electrode of which is connected to the collector of the third transistor, and a positive electrode of which is connected to the emitter of the third transistor;

[0030] a fifth resistor, a first end of which is connected to the emitter of the third transistor, and a second end of which is connected to the second end of the fourth resistor;

[0031] a sixth resistor, a first end of which is connected to the first end of the second resistor, and a second end of which is connected to the base of the third transistor;

[0032] a seventh resistor, a first end of which is connected to the collector of the third transistor, and a second end of which is connected to a power supply;

[0033] a second capacitor, a first end of which is connected to ground, and a second end of which is connected to the first end of the sixth resistor;

[0034] a third capacitor, a positive end of which is connected to the first end of the sixth resistor, and a negative end of which is connected to ground;

[0035] wherein the third capacitor is an electrolytic capacitor.

[0036] Optionally, the device further comprises:

[0037] a protection circuit, configured to protect the driving circuit;

[0038] a filter circuit, configured to filter out noise.

[0039] Optionally, the protection circuit comprises:

[0040] a voltage stabilizing diode, a negative end of which is connected to the second end of the fourth resistor in the driving circuit, and a positive end of which is connected to ground;

[0041] an eighth resistor, a first end of which is connected to the negative end of the voltage stabilizing diode, and a second end of which is connected to the positive end of the voltage stabilizing diode;

[0042] an insulated gate bipolar transistor, a base of which is connected to the negative end of the voltage stabilizing diode, an emitter of which is connected to the positive end of the voltage stabilizing diode, and a collector of which is connected to the inductor.

[0043] In a second aspect, an electric rice cooker is provided, comprising the device as described above.

[0044] The utility model relates to a kind of electric rice cooker anti-overflow device and electric rice cooker, and the anti-overflow device includes: temperature detection circuit, for detecting the temperature of the top of electric rice cooker inner pot, after the top temperature reaches second preset temperature, periodic driving signal is generated;Driving circuit is used to generate periodic pot detection current under the action of the periodic driving signal;Resonant circuit is used to generate periodic transient electromagnetic pulse under the periodic pot detection current;Wherein, the periodic pot detection current and the periodic transient electromagnetic pulse are used to make the electric rice cooker inner pot produce vibration, to make the bubble in the electric rice cooker inner pot break down.The utility model can reduce the risk of overflow, also can make the temperature of inner pot more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 The diagram shown is a schematic diagram of a rice cooker according to an embodiment of the present invention;

[0048] Figure 2 The diagram shown is a structural schematic of the rice cooker anti-overflow device according to an embodiment of this utility model.

[0049] Figure 3 The diagram shown is a circuit diagram of the rice cooker anti-overflow device according to an embodiment of this utility model.

[0050] Figure 4 The image shown is a cross-sectional schematic diagram of a rice cooker according to an embodiment of this utility model. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] Figure 1 The diagram shown is a schematic representation of a rice cooker according to an embodiment of the present invention. Figure 1 As shown, the rice cooker includes an outer pot 110 and an inner pot 120. The inner pot 120 is usually detached from the outer pot 110 and can be removed; that is, there is a certain gap between the inner pot 120 and the outer pot 110.

[0053] The circuitry and other components in this embodiment are located inside the outer pot 110.

[0054] This utility model relates to an anti-overflow device for rice cookers, which is applied to... Figure 1 The rice cooker shown is an example. However, the device in this embodiment is not limited to... Figure 1 The rice cooker shown can also be used in other household appliances for cooking rice and porridge.

[0055] Figure 2 As shown in a schematic view of a rice cooker anti-overflow device according to an embodiment of the present application, the device comprises: Figure 2

[0056] A temperature detection circuit 210 is configured to detect the temperature of the top of the inner pot of the rice cooker, and generate a periodic driving signal when the temperature reaches a second preset temperature.

[0057] A driving circuit 220 is configured to generate a periodic pot detection current under the action of the periodic driving signal.

[0058] A resonance circuit 230 is configured to generate a periodic instantaneous electromagnetic pulse under the action of the periodic pot detection current.

[0059] The periodic pot detection current and the periodic instantaneous electromagnetic pulse are configured to cause the inner pot of the rice cooker to vibrate, so as to break the bubbles in the inner pot of the rice cooker.

[0060] In an embodiment of the present application, the periodic pot detection current and the periodic instantaneous electromagnetic pulse are also configured to heat the food in the inner pot of the rice cooker.

[0061] In an embodiment of the present application, the second preset temperature can be 100 degrees, or the second preset temperature can be the boiling point of water. Since the boiling point of water varies at different pressures and altitudes, the specific value of the second preset temperature may vary slightly depending on the actual situation.

[0062] The rice cooker needs to add water when it is working, i.e., when the rice cooker is cooking rice or when the rice cooker is cooking porridge. When the temperature of the food in the rice cooker reaches about 100 degrees, water will produce bubbles due to boiling. These bubbles will drive solids to form larger bubbles, and these large bubbles are the main cause of the overflow of the liquid and solid-liquid mixture inside the rice cooker. The overflow of the rice cooker will reduce the temperature in the pot, waste energy, and increase the difficulty of cleaning the rice cooker.

[0063] In an embodiment of the present application, the periodic pot detection current and the periodic instantaneous electromagnetic pulse are configured to cause the inner pot of the rice cooker to vibrate, which can break the bubbles in the inner pot through physical action, thereby reducing the overflow of the rice cooker.

[0064] The rice cooker according to an embodiment of the present application can be divided into multiple stages when cooking rice, and each stage is a periodic heating.

[0065] After the rice cooker is started, it enters the first stage, and usually switches to the second stage when the temperature reaches 60 degrees. In the first stage, it can be heated for 4 seconds, stopped for 16 seconds, then heated for 4 seconds, and stopped for 16 seconds.

[0066] ​The first stage is the beginning of the cooking process, the heating time is short, and the stopping time is long, so that the food in the electric cooker can be fully soaked in the liquid at a high temperature, and the taste of the finished product can be improved.

[0067] In the second stage, it can be heated for 14 seconds, stopped for 16 seconds, then heated for 14 seconds, and stopped for 16 seconds.

[0068] In the second stage, the temperature reaches 80 degrees, and this stage prolongs the heating time, which can quickly heat the liquid to boiling and reduce the cooking time.

[0069] The third stage is a fixed time, which can be set according to the power of the electric cooker, the cooking mode, etc., and can usually be set to 6 minutes. In the third stage, the electric cooker is heated from 80 degrees to 100 degrees, and continues to heat at about 100 degrees, and in this stage, the liquid boils and a large amount of bubbles are generated. In the third stage, it can be heated for 1 second, stopped for 1 second, heated for 1 second, and stopped for 1 second.

[0070] The rapid switching of heating and stopping can make the temperature of the inner pot more uniform, and the alternating heating and stopping also helps to control the size of the bubbles in the pot, which helps to reduce overflow.

[0071] The fourth stage can be heated for 3 seconds, stopped for 16 seconds, heated for 3 seconds, and stopped for 16 seconds.

[0072] In the utility model embodiment, after the fourth stage, the electric cooker does not heat any more, but can still be in a heat preservation state.

[0073] Figure 3 As shown in the structure schematic diagram of the resonant circuit and the circuit of the utility model, reference Figure 3 As shown, the resonant circuit comprises:

[0074] The inductor coil L is connected with the driving circuit and is used for receiving the periodic pot detection current;

[0075] The resonant capacitor C5 is connected with the first end of the inductor coil L and the second end of the inductor coil L;

[0076] The resonant circuit generates periodic instantaneous electromagnetic pulses under the periodic pot detection current;

[0077] The inductor coil L and the resonant capacitor C5 form a resonant loop, and the resonant loop is used for generating the periodic instantaneous electromagnetic pulses according to the periodic pot detection current.

[0078] The periodic driving signal generated by the driving circuit is high and low level alternately changed, and the periodic detection pot current is also large current and small current alternately, or large current and no current alternately changed.

[0079] The inductance coil L and the resonance capacitor C5 form a resonance circuit, under the periodic detection pot current, the resonance capacitor C5 is periodically charged and discharged, according to the electromagnetic induction principle, the periodic detection pot current generates a periodically changed electric field, the changed electric field generates a changed magnetic field, since the periodic detection pot current is also large current and small current alternately, or large current and no current alternately changed, therefore the generated magnetic field is also large magnetic field and small magnetic field, or large magnetic field and no magnetic field alternately changed, that is, the generated magnetic field can be regarded as a periodic transient electromagnetic pulse.

[0080] Under the joint action of the periodic detection pot current and the periodic transient electromagnetic pulse, when the container containing the magnetic conductive material is placed in the magnetic field, the magnetic force line cutting on the surface of the container will generate eddy current in the metal part at the bottom of the container, the eddy current makes the carrier in the metal move at high speed in a random manner, and collides and rubs with atoms, so that heat energy is generated.

[0081] At the same time, the periodic detection pot current of the inductance coil L generates a periodic transient electromagnetic pulse, the periodic transient electromagnetic pulse makes the electric rice cooker inner pot generate a periodic eddy current, the eddy current of the electric rice cooker inner pot generates a magnetic field in the opposite direction, the periodic transient electromagnetic pulse of the inductance coil L and the electromagnetic field of the electric rice cooker inner pot interact with each other, so that the electric rice cooker inner pot generates vibration. The vibration of the electric rice cooker inner pot can break the domestic bubbles through physical action, so as to reduce the overflow of the electric rice cooker.

[0082] As shown in Figure 3 , the driving circuit comprises:

[0083] A first resistor R1, a first end of which is connected with the temperature detection circuit;

[0084] A second resistor R2, a second end of which is connected with the first end of the first resistor R1;

[0085] A first triode Q1, a base of which is connected with the second end of the first resistor R1, and an emitter of which is grounded;

[0086] A third resistor R3, a first end of which is connected with the base of the first triode Q1, and a second end of which is grounded;

[0087] A second triode Q2, a base of which is connected with the collector of the first triode Q1, and a collector of which is grounded;

[0088] A first capacitor C1, a first end of which is connected with the base of the second triode Q2, and a second end of which is grounded;

[0089] A fourth resistor R4, a first end of which is connected to an emitter of the second transistor Q2;

[0090] A third transistor Q3, a base of which is connected to a base of the second transistor;

[0091] A first diode D1, a negative electrode of which is connected to a collector of the third transistor Q3, and a positive electrode of which is connected to an emitter of the third transistor Q3;

[0092] A fifth resistor R5, a first end of which is connected to the emitter of the third transistor Q3, and a second end of which is connected to a second end of the fourth resistor R4;

[0093] A sixth resistor R6, a first end of which is connected to the first end of the second resistor R2, and a second end of which is connected to the base of the third transistor Q3;

[0094] A seventh resistor R7, a first end of which is connected to the collector of the third transistor Q3, and a second end of which is connected to a power supply VC;

[0095] A second capacitor C2, a first end of which is grounded, and a second end of which is connected to the first end of the sixth resistor R6;

[0096] A third capacitor C3, a positive electrode of which is connected to the first end of the sixth resistor R6, and a negative electrode of which is grounded.

[0097] The third capacitor C3 is an electrolytic capacitor.

[0098] As shown in Figure 2 , Figure 3 the device further comprises:

[0099] A protection circuit 240 for protecting the driving circuit;

[0100] A filter circuit 250 for filtering out noise.

[0101] As shown in Figure 2 , Figure 3 the protection circuit comprises:

[0102] A voltage stabilizing diode ZD1, a negative electrode of which is connected to the second end of the fourth resistor in the driving circuit, and a positive electrode of which is grounded;

[0103] An eighth resistor R8, a first end of which is connected to the negative electrode of the voltage stabilizing diode ZD1, and a second end of which is connected to the positive electrode of the voltage stabilizing diode ZD1;

[0104] An insulated gate bipolar transistor Q4, a base of which is connected to the negative electrode of the voltage stabilizing diode ZD1, an emitter of which is connected to the positive electrode of the voltage stabilizing diode ZD1, and a collector of which is connected to the inductor L;

[0105] The driving circuit is connected with the temperature detection circuit, and the temperature detection circuit outputs a periodic driving signal in the third stage.

[0106] The filter circuit 250 comprises a fourth capacitor C4, a first end of the fourth capacitor C4 being connected with a first end of the fifth capacitor, and a second end being grounded.

[0107] In the driving circuit, when the periodic driving signal is low, the first transistor Q1 and the second transistor Q2 are closed, the third transistor Q3 is opened, and the second end of the fourth resistor R4 outputs a voltage of 18V; when the periodic driving signal is high, the first transistor Q1 and the second transistor Q2 are opened, the third transistor Q3 is closed, and the second end of the fourth resistor R4 outputs a voltage of 0V.

[0108] The voltage stabilizing diode ZD1 and the eighth resistor R8 can constitute a protection unit for limiting the input voltage of the insulated gate bipolar transistor Q4, so as to protect the insulated gate bipolar transistor Q4 and the whole circuit.

[0109] When the gate input voltage of the insulated gate bipolar transistor Q4 is 18V, the insulated gate bipolar transistor Q4 is opened; when the gate input voltage of the insulated gate bipolar transistor Q4 is 0V, the insulated gate bipolar transistor Q4 is closed. The periodic detection current is output through the insulated gate bipolar transistor Q4.

[0110] Figure 4 As shown in the cross-sectional view of the electric rice cooker of the embodiment of the present application, as shown in the cross-sectional view of the electric rice cooker of the embodiment of the present application, Figure 4 The inductor coil comprises a bottom coil 410 and a side coil 420, and the length of the bottom coil 410 is greater than the length of the side coil 420.

[0111] The bottom coil 410 is a multi-layer wire component, each layer of the wire component is composed of a wire winding multiple turns, and the multi-layer wire components are sequentially connected, and the electromagnetic pulse directions generated by each layer of the wire component are the same.

[0112] Figure 4 In the embodiment shown, the bottom coil 410 comprises three layers of wire components.

[0113] The inductor coil is concentrated at the bottom, which can make the vibration of the inner pot of the electric rice cooker more obvious, can make the bubbles break as soon as possible through a physical way, and reduce the risk of overflow of the electric rice cooker.

[0114] In the embodiment of the present application, the inner pot of the electric rice cooker is a multi-layer composite pot, and the outer layer or the inner layer of the multi-layer composite pot is a magnetic conductor.

[0115] The inner pot of the electric rice cooker is a multi-layer composite pot, the outer layer of the multi-layer composite pot is a stainless steel layer, and the inner layer is an aluminum pot body.

[0116] The outer layer is a stainless steel layer, which can prevent the inner pot of the electric rice cooker from rusting, and the stainless steel can achieve the effects of heating and magnetic conduction.

[0117] The stainless steel layer can also have other coating layers for preventing sticking, which will not be described here.

[0118] The embodiment of the utility model provides a kind of electric rice cooker, including the device as described above.

[0119] In the embodiment of the utility model, in the process of cooking, the inner pot vibrates, which can make the bubbles in the inner pot break, reducing the risk of overflow.

[0120] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments. Any reference to memory, storage, database or other medium used in the embodiments provided by the utility model can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM) and memory bus dynamic RAM (RDRAM), etc.

[0121] It is to be noted that, in the present document, relational terms such as "first" and "second", and the like can be used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0122] The foregoing is merely illustrative of the principles of the application and various modifications can be made by persons skilled in the art without departing from the scope and nature of the teachings herein. Accordingly, while the present application is shown embodied in the environments and processes described herein, it is understood that the application is not limited to the embodiments disclosed, but is intended to cover all changes, modifications, and equivalents falling within the true spirit and scope of the application.

Claims

1. An anti-overflow device for a rice cooker, characterized in that, The device comprises: a temperature detection circuit for detecting the temperature of the top of the inner pot of the electric rice cooker, and generating a periodic driving signal after the temperature reaches a second preset temperature; a driving circuit for generating a periodic pot detection current under the action of the periodic driving signal; a resonance circuit for generating a periodic instantaneous electromagnetic pulse under the periodic pot detection current; wherein the periodic pot detection current and the periodic instantaneous electromagnetic pulse are used to make the inner pot of the electric rice cooker vibrate to break the bubbles in the inner pot of the electric rice cooker.

2. The apparatus of claim 1, wherein, The periodic pot detection current and the periodic instantaneous electromagnetic pulse are also used to heat the food in the inner pot of the electric rice cooker.

3. The apparatus of claim 1, wherein, The resonance circuit comprises: an inductor coil connected to the driving circuit for receiving the periodic pot detection current; a resonance capacitor with a first end connected to a first end of the inductor coil and a second end connected to a second end of the inductor coil; wherein the inductor coil and the resonance capacitor form a resonance circuit for generating the periodic instantaneous electromagnetic pulse according to the periodic pot detection current.

4. The apparatus of claim 3, wherein, The inductor coil comprises a bottom coil and a side coil, and the length of the bottom coil is greater than the length of the side coil; The bottom coil is a multi-layer wire component, each layer of the wire component is composed of a wire wound multiple times, and the multi-layer wire components are sequentially connected, and each layer of the wire component generates electromagnetic pulses in the same direction.

5. The apparatus of claim 1, wherein, The inner pot of the electric rice cooker is a multi-layer composite pot, and the outer layer or the inner layer of the multi-layer composite pot is a magnetic conductor.

6. The apparatus of claim 1, wherein, The inner pot of the electric rice cooker is a multi-layer composite pot, and the outer layer of the multi-layer composite pot is a stainless steel layer and the inner layer is an aluminum pot body.

7. The apparatus of claim 4, wherein, The driving circuit comprises: a first resistor with a first end connected to the temperature detection circuit; a second resistor with a second end connected to the first end of the first resistor; a first transistor with a base connected to the second end of the first resistor and an emitter connected to ground; a third resistor with a first end connected to the base of the first transistor and a second end connected to ground; a second transistor with a base connected to the collector of the first transistor and a collector connected to ground; a first capacitor with a first end connected to the base of the second transistor and a second end connected to ground; a fourth resistor with a first end connected to the emitter of the second transistor; a third transistor with a base connected to the base of the second transistor; a first diode with a negative electrode connected to the collector of the third transistor and a positive electrode connected to the emitter of the third transistor; a fifth resistor with a first end connected to the emitter of the third transistor and a second end connected to the second end of the fourth resistor; a sixth resistor with a first end connected to the first end of the second resistor and a second end connected to the base of the third transistor; a seventh resistor with a first end connected to the collector of the third transistor and a second end connected to a power supply; a second capacitor with a first end connected to ground and a second end connected to the first end of the sixth resistor; a third capacitor with a positive electrode connected to the first end of the sixth resistor and a negative electrode connected to ground; wherein the third capacitor is an electrolytic capacitor.

8. The apparatus of claim 7, wherein, The device further comprises: a protection circuit for protecting the driving circuit; Filter circuit for filtering out noise.

9. The apparatus of claim 8, wherein, The protection circuit comprises: A Zener diode, the negative electrode of which is connected to the second end of the fourth resistor in the driving circuit, and the positive electrode of which is grounded; An eighth resistor, the first end of which is connected to the negative electrode of the Zener diode, and the second end of which is connected to the positive electrode of the Zener diode; An insulated gate bipolar transistor, the base electrode of which is connected to the negative electrode of the Zener diode, the emitter electrode of which is connected to the positive electrode of the Zener diode, and the collector electrode of which is connected to the inductor coil.

10. An electric rice cooker, characterized by comprising: A device as claimed in any one of claims 1 to 9.

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