Detection Circuit, Gas Stove System, Control Method and Control Device of Gas Stove

Abstract

The present invention relates to a detection circuit for a gas stove, a gas stove system, a control method and a control device. The detection circuit of the gas stove includes: a test chip; a first voltage-dividing element, whose first end is connected to a power supply, and the second end is connected to a first port of the test chip; a second voltage-dividing element, whose first end is connected to the second end of the first voltage-dividing element, and the second end of the second voltage-dividing element is grounded, and the first port is a voltage detection port; a first contact, which is connected to the second end of the first voltage-dividing element; a second contact, which is connected to the second end of the second voltage-dividing element. The detection circuit of the gas stove of the present invention can overcome the defect that in the prior art, the gas stove is prone to gas waste or even dry burning when the user takes away the cooking utensil and forgets to turn off the fire, thereby reducing gas waste and reducing the risk of fire caused by dry burning.

Description

Technical Field

[0001] The present invention relates to the technical field of gas stoves, and particularly to a detection circuit for a gas stove, a gas stove system, a control method and a control device. Background Art

[0002] Gas stoves are highly favored by people due to their convenience of being turned on and used immediately, and are widely used in people's lives. During the process of using a traditional gas stove for cooking, gas safety is the primary concern. It often happens that users lift the cookware and forget to turn off the fire, resulting in dry burning. This not only easily causes gas waste but also easily leads to fires. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that gas waste or even dry burning may occur when the user lifts the cookware and forgets to turn off the fire in the prior art, so as to provide a detection circuit for a gas stove, a gas stove system, a control method and a control device.

[0004] To solve the above problems, a first aspect of the present invention provides a detection circuit for a gas stove, including: a test chip; a first voltage-dividing element, whose first end is connected to a power supply, and the second end is connected to a first port of the test chip; a second voltage-dividing element, whose first end is connected to the second end of the first voltage-dividing element, and the second end of the second voltage-dividing element is grounded, and the first port is a voltage detection port; a first contact, which is connected to the second end of the first voltage-dividing element, and the first contact is adapted to contact a point on the bottom of the pot when there is a pot on the gas stove; a second contact, which is connected to the second end of the second voltage-dividing element, and the second contact is adapted to contact another point on the bottom of the pot when there is a pot on the gas stove.

[0005] Further, the detection circuit further includes a current-limiting voltage-dividing element, whose first end is connected to the second end of the first voltage-dividing element, and the second end is connected to the first port of the test chip.

[0006] Further, the detection circuit further includes a temperature sensor connected to the second end of the second voltage-dividing element, the temperature sensor is connected to a second port of the test chip, and the second contact is formed on the temperature sensor.

[0007] Further, the temperature sensor is a thermocouple.

[0008] Further, the detection circuit further includes an operational amplifier, and the operational amplifier is connected between the thermocouple and the second port of the test chip.

[0009] Further, the hot end of the thermocouple is connected to the non-inverting input terminal of the operational amplifier, the cold end of the thermocouple is grounded, the inverting input terminal of the operational amplifier is grounded, and the output terminal of the operational amplifier is connected to the second port of the test chip.

[0010] Further, the detection circuit further includes a pressing member connected to the second end of the first voltage dividing element, and the first contact is formed on the pressing member.

[0011] Further, the detection circuit further includes a first elastic member and a second elastic member. The first elastic member is disposed between the thermocouple and the operational amplifier, and the second elastic member is disposed between the pressing member and the current limiting voltage dividing element.

[0012] The second aspect of the present invention relates to a gas stove system, including a burner head and the detection circuit of the gas stove as described in the first aspect of the present invention.

[0013] The third aspect of the present invention relates to a control method for a gas stove system, which is applied to the gas stove system described in the second aspect of the present invention. The control method includes the following steps:

[0014] Obtain the voltage signal detected by the test chip;

[0015] When the voltage signal measured by the test chip reaches a preset first threshold, it is determined that there is no pot on the gas stove.

[0016] Further, after determining that there is no pot on the gas stove, it further includes:

[0017] Obtain the duration of no pot on the gas stove;

[0018] Judge whether the duration of no pot on the gas stove is greater than a first preset time;

[0019] When the duration of no pot on the gas stove is greater than the first preset time, judge whether the duration of no pot on the gas stove is less than a second preset time, and the second preset time is greater than the first preset time;

[0020] When the duration of no pot on the gas stove is less than the second preset time, control the gas valve of the gas stove system to reduce the opening degree;

[0021] When the duration of no pot on the gas stove is greater than or equal to the second preset time, close the gas valve.

[0022] The fourth aspect of the present invention relates to a control device for a gas stove system, which is applied to the gas stove system described in the second aspect of the present invention. The control device includes:

[0023] An acquisition module, configured to acquire the voltage signal detected by the test chip;

[0024] A judgment module, configured to determine that there is no pot on the gas stove when the voltage signal measured by the test chip reaches a preset first threshold.

[0025] The present invention has the following advantages:

[0026] 1. As can be seen from the above technical solution, the gas stove detection circuit in the first aspect of the present invention mainly includes a test chip, a first voltage-dividing element, a second voltage-dividing element, a first contact and a second contact. When there is no pot on the gas stove, the first voltage-dividing element and the second voltage-dividing element can be connected in series with each other. The first port is connected to the second end of the second voltage-dividing element, and the test chip can detect the voltage divided by the second voltage-dividing element through the first port. When there is a pot on the gas stove, the first contact and the second contact can respectively contact different positions of the bottom of the pot, so that the bottom of the pot between the first contact and the second contact can be connected in parallel with the second voltage-dividing element. Since the resistance of the bottom of the pot is extremely small, the second voltage-dividing element can be short-circuited by the bottom of the pot, so it cannot divide the voltage, and the test chip can detect that the voltage divided by the second voltage-dividing element is zero through the first port. Therefore, the detection circuit of the gas stove of the present invention can judge whether there is a pot on the gas stove according to the change state of the measured voltage, and allows the gas stove to be set to: automatically turn off the fire when the pot is away for a long time, reducing the safety hazard of forgetting to turn off the fire; when the pot is away for a short time, the firepower can be reduced, and the firepower can be restored when the pot is placed, reducing the risk of scalding when the pot is away and saving gas. It can overcome the defect that the gas stove in the prior art is prone to gas waste or even dry burning due to the user taking away the pot and forgetting to turn off the fire, thereby reducing gas waste and reducing the risk of fire caused by dry burning.

[0027] 2. The gas stove detection circuit further includes a current-limiting voltage-dividing element. The first end of the current-limiting voltage-dividing element is connected to the second end of the first voltage-dividing element, and the second end of the current-limiting voltage-dividing element is connected to the first port of the test chip. The current-limiting voltage-dividing element can play a role in voltage division, thereby protecting the test chip.

[0028] 3. The detection circuit further includes a temperature sensor connected to the second end of the second voltage-dividing element. The temperature sensor is connected to the second port of the test chip. The second contact is formed on the temperature sensor. This enables the same temperature sensor to not only play a role in connecting with the bottom of the pot, but also play a role in detecting the flame temperature of the stove. By obtaining the flame temperature at the first contact, it can assist in adjusting the opening degree of the gas valve of the gas stove, making the temperature adjustment of the gas stove more accurate. In order to improve the accuracy of temperature detection, the detection circuit of the gas stove preferably further includes an operational amplifier, and the operational amplifier is connected between the thermocouple and the first port of the test chip. The operational amplifier can amplify the electric potential generated after the thermocouple is heated and convert it into a signal that can be used for sampling to judge the size of the flame temperature. The second port can judge the flame temperature of the gas stove according to the signal output by the operational amplifier.

[0029] 4. The detection circuit preferably further includes a pressing member connected to the second end of the first voltage dividing element. The first contact is formed on the pressing member. The pressing member is preferably but not limited to structures such as a thimble that can be pressed tightly against the bottom of the pot. The detection circuit further includes a first elastic member and a second elastic member. Among them, the first elastic member is arranged between the thermocouple and the operational amplifier. The first elastic member can be compressed by the bottom of the pot when the pot is placed on the gas stove, so as to ensure reliable conduction between the thermocouple and the bottom of the pot, and at the same time prevent the bottom of the pot from being damaged. The second elastic member is arranged between the metal thimble and the current limiting voltage dividing element. The second elastic member can be compressed by the bottom of the pot when the pot is placed on the gas stove, so as to ensure reliable conduction between the thimble and another point on the bottom of the pot, and at the same time prevent the bottom of the pot from being damaged.

[0030] 5. The second aspect of the present invention relates to a gas stove system, including a burner head and the detection circuit of the above-mentioned gas stove. This gas stove system can overcome the defect in the prior art that gas will be wasted or even dry burned when the user takes the cookware away and forgets to turn off the fire, thereby reducing the waste of the gas stove and improving the safety of the gas stove.

[0031] 6. The third aspect of the present invention relates to a control method for a gas stove system. This control method can obtain the voltage signal detected by the test chip, and when the voltage signal measured by the test chip reaches a preset first threshold, it is determined that there is no pot on the gas stove. It allows the gas stove to be set to: automatically turn off the fire when the cookware is away for a long time, reducing the safety hazard of forgetting to turn off the fire; turn down the firepower when the cookware is away for a short time and restore the firepower when the pot is placed, reducing the risk of scalding when the cookware is away and saving gas. It can overcome the defect in the prior art that the gas stove is prone to gas waste or even dry burning when the user takes the cookware away and forgets to turn off the fire, thus reducing gas waste and reducing the risk of fire caused by dry burning.

[0032] 7. The fourth aspect of the present invention relates to a control device for a gas stove system. This control device can obtain the voltage signal detected by the test chip, and when the voltage signal measured by the test chip reaches a preset first threshold, it is determined that there is no pot on the gas stove. It allows the gas stove to be set to: automatically turn off the fire when the cookware is away for a long time, reducing the safety hazard of forgetting to turn off the fire; turn down the firepower when the cookware is away for a short time and restore the firepower when the pot is placed, reducing the risk of scalding when the cookware is away and saving gas. It can overcome the defect in the prior art that the gas stove is prone to gas waste or even dry burning when the user takes the cookware away and forgets to turn off the fire, thus reducing gas waste and reducing the risk of fire caused by dry burning. Description of the Drawings

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 Shows the first contact and the second contact of the gas stove detection circuit according to Embodiment 1 of the present invention;

[0035] Figure 2 Is the circuit diagram of the gas stove detection circuit according to Embodiment 1 of the present invention;

[0036] Figure 3 Is the schematic diagram of the gas stove detection circuit according to Embodiment 1 of the present invention in the use state;

[0037] Figure 4 Is the flowchart of the control method of the gas stove system according to Embodiment 3 of the present invention.

[0038] Explanation of reference numerals:

[0039] 100, detection circuit; MCU, test chip; VCC, power supply; IO2, first port; IO1, second port; R1, first voltage dividing element; R2, second voltage dividing element; 1, first contact; 2, second contact; R3, current limiting and voltage dividing element; 3, thermocouple; 4, operational amplifier; 5, pressing member; 61, first elastic member; 62, second elastic member. Specific embodiments

[0040] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Embodiment 1

[0045] Figure 1 The first contact and the second contact of the gas stove detection circuit according to Embodiment 1 of the present invention are shown. Figure 2 This is the circuit diagram of the gas stove detection circuit according to Embodiment 1 of the present invention. As Figure 1 and Figure 2 shown, Embodiment 1 of the present invention relates to a detection circuit 100 of a gas stove, including a test chip MCU, a first voltage dividing element R1, a second voltage dividing element R2, a first contact 1, and a second contact 2. The first end of the first voltage dividing element R1 is connected to the power supply VCC, and the second end is connected to the first port IO2 of the test chip MCU. The first end of the second voltage dividing element R2 is connected to the second end of the first voltage dividing element R1. The second end of the second voltage dividing element R2 is grounded. The first port IO2 is a voltage detection port. The first contact 1 is connected to the second end of the first voltage dividing element R1. The first contact 1 is adapted to contact a point on the bottom of the pot when there is a pot on the gas stove. The second contact 2 is connected to the second end of the second voltage dividing element R2. The second contact 2 is adapted to contact another point on the bottom of the pot when there is a pot on the gas stove. The second voltage dividing element R2 can be selected as a resistor, or can also be selected as an alloy with a relatively high resistivity made of materials such as constantan, nickel-chromium, nickel-chromium-iron, and iron-chromium-aluminum.

[0046] As can be seen from the above technical solution, the gas stove detection circuit 100 of this embodiment mainly includes a test chip MCU, a first voltage dividing element R1, a second voltage dividing element R2, a first contact 1 and a second contact 2. When there is no pot on the gas stove, the first voltage dividing element R1 and the second voltage dividing element R2 can be connected in series with each other. The first port IO2 is connected to the second end of the second voltage dividing element R2, and the test chip MCU can detect the voltage divided by the second voltage dividing element R2 through the first port IO2. When there is a pot on the gas stove, the first contact 1 and the second contact 2 can respectively contact different positions of the bottom of the pot, so that the bottom of the pot between the first contact 1 and the second contact 2 can be connected in parallel with the second voltage dividing element R2. Since the resistance of the bottom of the pot is extremely small, the second voltage dividing element R2 can be short-circuited by the bottom of the pot, so it cannot divide the voltage, and the test chip MCU can detect that the voltage divided by the second voltage dividing element R2 is zero through the first port IO2. Therefore, the detection circuit 100 of the gas stove of the present invention can judge whether there is a pot on the gas stove according to the change state of the measured voltage, and allows the gas stove to be set to: automatically turn off the fire when the pot is away for a long time, reducing the safety hazard of forgetting to turn off the fire; when the pot is away for a short time, the firepower can be reduced, and the firepower can be restored when the pot is placed on the stove, reducing the risk of scalding when the pot is away and saving gas. It can overcome the defect that the gas stove in the prior art is prone to gas waste or even dry burning due to the user taking away the pot and forgetting to turn off the fire, thus reducing gas waste and reducing the risk of fire caused by dry burning. At the same time, the gas stove detection circuit 100 of the embodiment of the present invention has a simple structure, a low implementation cost, and a high detection efficiency.

[0047] In this embodiment, the gas stove detection circuit 100 further includes a current limiting and voltage dividing element R3. The first end of the current limiting and voltage dividing element R3 is connected to the second end of the first voltage dividing element R1, and the second end of the current limiting and voltage dividing element R3 is connected to the first port IO2 of the test chip MCU. The current limiting and voltage dividing element R3 can play a role in voltage division, thereby protecting the test chip MCU. The first voltage dividing element R1 and the current limiting and voltage dividing element R3 are preferably but not limited to fixed resistors.

[0048] In this embodiment, the detection circuit 100 further includes a temperature sensor connected to the second end of the component R2. The temperature sensor is connected to the second port IO1 of the test chip MCU. The second contact 22 is formed on the temperature sensor. This enables the same temperature sensor to not only function as a connection to the bottom of the pot but also detect the flame temperature of the stove. By obtaining the flame temperature at the first contact 1, it can assist in adjusting the opening degree of the gas valve of the gas stove, making the temperature adjustment of the gas stove more precise. Among them, the temperature sensor can be selected from type 3 thermocouple sensors or thermistor sensors. For example, in this embodiment, the temperature sensor is selected as thermocouple 3. To improve the accuracy of temperature detection, the detection circuit 100 of the gas stove preferably further includes an operational amplifier 4, and the operational amplifier 4 is connected between the thermocouple 3 and the second port IO1 of the test chip MCU. The operational amplifier 4 can amplify the electromotive force generated after the thermocouple 3 is heated and convert it into a signal that can be used for sampling to judge the size of the flame temperature. The second port IO1 can judge the flame temperature of the gas stove according to the signal output by the operational amplifier 4. Specifically, the hot end of the thermocouple 3 is connected to the non-inverting input terminal of the operational amplifier 4. The cold end of the thermocouple 3 is grounded, the inverting input terminal of the operational amplifier 4 is grounded, and the output terminal of the operational amplifier 4 is connected to the second port IO1 of the test chip MCU.

[0049] As Figure 3 shown, in this embodiment, the detection circuit 100 preferably further includes a pressing member 5 connected to the second end of the first voltage-dividing element R1. The first contact 1 is formed on the pressing member 5. The pressing member 5 is preferably but not limited to a structure such as a thimble that can be pressed tightly on the bottom of the pot. Preferably, the detection circuit 100 of this embodiment further includes a first elastic member 61 and a second elastic member 62. Among them, the first elastic member 61 is arranged between the thermocouple 3 and the operational amplifier 4. The first elastic member 61 can be compressed by the bottom of the pot when the pot is placed on the gas stove, so as to ensure reliable conduction between the thermocouple 3 and the bottom of the pot, and at the same time prevent the bottom of the pot from being damaged. The second elastic member 62 is arranged between the metal thimble and the current-limiting voltage-dividing element R3. The second elastic member 62 can be compressed by the bottom of the pot when the pot is placed on the gas stove, so as to ensure reliable conduction between the thimble and another point on the bottom of the pot, and at the same time prevent the bottom of the pot from being damaged. The test chip MCU is preferably but not limited to an MCU chip. The first elastic member 61 and the second elastic member 62 are preferably but not limited to springs, etc.

[0050] Embodiment 2

[0051] Embodiment 2 relates to a gas stove system, including a burner head and the detection circuit 100 of the above-mentioned gas stove. This gas stove system can overcome the defect that gas will be wasted or even dry-burned when the user takes the cookware away and forgets to turn off the fire in the prior art, thereby reducing the waste of the gas stove and improving the safety of the gas stove.

[0052] Embodiment 3

[0053] Embodiment 3 relates to a control method for a gas stove system. As Figure 4 shown, the control method of the gas stove system in Embodiment 3 is applied to the gas stove system in Embodiment 2. The control method mainly includes Step S1 and Step S2. Among them,

[0054] Step S1 includes obtaining the voltage signal detected by the test chip MCU.

[0055] Step S2 includes determining that there is no pot on the gas stove when the voltage signal measured by the test chip MCU reaches a preset first threshold.

[0056] Among them, the value of the first threshold can be obtained according to the voltage of the power supply VCC, the models of the first voltage dividing element R1 and the second voltage dividing element R2. Specifically, since the test chip MCU can measure the voltage divided by the second voltage dividing element R2, the value of the first threshold can be selected as V1 = VCC * R2 / (R1 + R2), or any value less than V1 and greater than zero.

[0057] Among them, VCC refers to the output voltage of the power supply VCC; R2 refers to the resistance value of the second voltage dividing element R2; R1 refers to the resistance value of the first voltage dividing element R1. When there is no pot on the gas stove, the second voltage dividing element R2 can be connected in series with the first voltage dividing element R1 and divide the voltage V1. When there is a pot on the gas stove, the second voltage dividing element R2 can be short-circuited, so that the test result of the test chip MCU is zero.

[0058] In this embodiment, after determining that there is no pot on the gas stove, it further includes Step (1), Step (2), Step (3), Step (4) and Step (5).

[0059] Step (1) includes obtaining the duration of no pot on the gas stove;

[0060] Step (2) includes determining whether the duration of no pot on the gas stove is greater than a first preset time.

[0061] Step (3) includes, when the duration of no pot on the gas stove is greater than the first preset time, determining whether the duration of no pot on the gas stove is less than a second preset time, and the second preset time is greater than the first preset time.

[0062] Step (4) includes, when the duration of no pot on the gas stove is less than the second preset time, controlling the gas valve of the gas stove system to reduce the opening degree.

[0063] Step (5) includes closing the gas valve when the duration of no pot on the gas stove is greater than or equal to the second preset time.

[0064] The duration of no pot on the gas stove is preferably but not limited to obtained by a timer. The first preset time is preferably but not limited to any value within 3 - 5 minutes, which enables the gas stove system to control the gas valve to reduce the opening degree when the pot briefly leaves the gas stove, thus playing a role in saving gas. The second preset value is preferably but not limited to any value within 10 - 30 minutes, which enables the gas stove system to close the gas valve after the pot has been away from the gas stove for a long time, avoiding potential safety hazards caused by dry burning.

[0065] Embodiment 4

[0066] Embodiment 4 relates to a control device for a gas stove system. This control device can acquire the voltage signal detected by a test chip and determine that there is no pot on the gas stove when the voltage signal measured by the test chip reaches a preset first threshold. It allows the gas stove to be set such that it can automatically turn off when the cookware is away for a long time, reducing the safety hazard of forgetting to turn off the fire; when the cookware is away for a short time, it can turn down the firepower and restore the firepower when the pot is placed back, reducing the risk of scalding when the pot is away and saving gas. It can overcome the defect in the prior art that the gas stove is prone to gas waste or even dry burning when the user takes the pot away and forgets to turn off the fire, thus reducing gas waste and the risk of fire caused by dry burning.

[0067] Obviously, the above - mentioned embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of this invention.

Claims

1. A detection circuit for a gas stove, characterized in that, it includes: a test chip (MCU); a first voltage-dividing element (R1), whose first end is connected to a power supply (VCC), and whose second end is connected to a first port (IO2) of the test chip (MCU); a second voltage-dividing element (R2), whose first end is connected to the second end of the first voltage-dividing element (R1), and whose second end is grounded, and the first port (IO2) is a voltage detection port; a first contact (1), which is connected to the second end of the first voltage-dividing element (R1), and the first contact (1) is adapted to contact a point on the bottom of the pot when there is a pot on the gas stove; a second contact (2), which is connected to the second end of the second voltage-dividing element (R2), and the second contact (2) is adapted to contact another point on the bottom of the pot when there is a pot on the gas stove.

2. The detection circuit according to claim 1, characterized in that, it further includes a current-limiting voltage-dividing element (R3), whose first end is connected to the second end of the first voltage-dividing element (R1), and whose second end is connected to the first port (IO2) of the test chip (MCU).

3. The detection circuit according to claim 1 or 2, characterized in that, it further includes a temperature sensor connected to the second end of the second voltage-dividing element (R2), the temperature sensor is connected to a second port (IO1) of the test chip (MCU), and the second contact (2) is formed on the temperature sensor.

4. The detection circuit according to claim 3, characterized in that, the temperature sensor is a thermocouple (3).

5. The detection circuit according to claim 4, characterized in that, it further includes an operational amplifier (4), and the operational amplifier (4) is connected between the thermocouple (3) and the second port (IO1) of the test chip (MCU).

6. The detection circuit according to claim 5, characterized in that, the hot end of the thermocouple (3) is connected to the non-inverting input terminal of the operational amplifier (4), the cold end of the thermocouple (3) is grounded, the inverting input terminal of the operational amplifier (4) is grounded, and the output terminal of the operational amplifier (4) is connected to the second port (IO1) of the test chip (MCU).

7. The detection circuit according to claim 6, characterized in that, it further includes a pressing member (5) connected to the second end of the first voltage-dividing element (R1), and the first contact (1) is formed on the pressing member (5).

8. The detection circuit according to claim 7, characterized in that, it further includes a first elastic member (61) and a second elastic member (62), the first elastic member (61) is arranged between the thermocouple (3) and the operational amplifier (4), and the second elastic member (62) is arranged between the pressing member (5) and the current-limiting voltage-dividing element (R3).

9. A gas stove system, characterized in that, it includes a burner and a detection circuit (100) of the gas stove according to any one of claims 1-8.

10. A control method for a gas stove system, applied to the gas stove system described in claim 9, characterized in that, the control method includes the following steps: Obtain the voltage signal detected by the test chip (MCU); When the voltage signal measured by the test chip (MCU) reaches a preset first threshold, it is determined that there is no pot on the gas stove.

11. According to the control method for the gas stove system described in claim 10, characterized in that, after determining that there is no pot on the gas stove, it further includes: Obtain the duration of no pot on the gas stove; Judge whether the duration of no pot on the gas stove is greater than a first preset time; When the duration of no pot on the gas stove is greater than the first preset time, judge whether the duration of no pot on the gas stove is less than a second preset time, and the second preset time is greater than the first preset time; When the duration of no pot on the gas stove is less than the second preset time, control the gas valve of the gas stove system to reduce the opening; After the duration of no pot on the gas stove is greater than or equal to the second preset time, close the gas valve.

12. A control device for a gas stove system, applied to the gas stove system described in claim 9, characterized in that, the control device includes: An acquisition module, configured to acquire the voltage signal detected by the test chip (MCU); A judgment module, configured to determine that there is no pot on the gas stove when the voltage signal measured by the test chip (MCU) reaches a preset first threshold.

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