A power supply control circuit for gas stove and gas stove

Abstract

The present invention provides a power supply control circuit and a gas stove applied to a gas stove, the power supply control circuit applied to the gas stove comprises: a first controlled switch, a first output end of the first controlled switch is externally connected to a power supply, and a second output end is connected to a power port of a built-in control chip of the gas stove; an ignition detection circuit, an input end of the ignition detection circuit is externally connected to a first signal, the first signal is a temperature signal at a burner of the gas stove, and the output end is connected to a control end of the first controlled switch. Thus, the burner temperature of the gas stove is detected by the ignition detection circuit, and the first controlled switch is controlled to be turned on only when a flame is detected on the burner, and power is supplied to the built-in control chip of the gas stove, ensuring that the gas stove is powered only when the user is using the gas stove, solving the problem of battery power consumption when the gas stove is not in use, saving energy and protecting the environment, and improving the battery life. It also has the advantages of simple circuit structure, low cost, and easy product implementation.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a power supply control circuit applied to a gas stove and a gas stove. Background Art

[0002] With the development of science and technology and the continuous improvement of people's living standards, the gas stove industry is also developing in the direction of environmental protection, energy saving, safety and low price. At the same time, as a necessary daily necessities in the kitchen, the gas stove has higher and higher requirements in terms of practicality, safety and multi-function.

[0003] Due to safety issues, most gas stoves on the market are now powered by dry batteries. Due to the diversification of gas stove functions, the power consumption of its power supply battery has increased significantly, which in turn affects the service life of the battery in the gas stove. In particular, the existing gas stoves will also consume battery power during the standby process. Therefore, how to effectively solve the power consumption problem of gas stoves during the standby process is of great significance to improving the service life of the battery and energy saving and environmental protection. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a power supply control circuit and a gas stove applied to a gas stove, so as to overcome the problem in the prior art that the gas stove consumes power during standby mode, thereby affecting the service life of the battery.

[0005] According to a first aspect, an embodiment of the present invention provides a power supply control circuit for a gas stove, comprising: a first controlled switch, wherein a first output end of the first controlled switch is externally connected to a power supply, and a second output end is connected to a power port of a built-in control chip of the gas stove; an ignition detection circuit, wherein an input end of the ignition detection circuit is externally connected to a first signal, the first signal is a temperature signal at a burner of the gas stove, and an output end is connected to a control end of the first controlled switch.

[0006] Optionally, the power supply control circuit applied to the gas stove also includes: a second controlled switch, the control end of the second controlled switch is connected to the output end of the ignition detection circuit, the first output end is connected to the control end of the first controlled switch, and the second output end is grounded.

[0007] Optionally, the power supply control circuit applied to the gas stove also includes: an ignition switch, and two ends of the ignition switch are respectively connected to the first output end and the second output end of the first controlled switch, or connected to the first output end and the second output end of the second controlled switch.

[0008] Optionally, the ignition detection circuit includes: a temperature sensor, which is arranged at the burner of the gas stove; a comparator, wherein the first input end of the comparator is externally connected to a level signal, the second input end is connected to the temperature sensor, and the output end is connected to the control end of the first controlled switch.

[0009] Optionally, the power supply control circuit applied to the gas stove further includes: a first resistor, one end of the first resistor is connected to the control end of the first controlled switch, and the other end of the first resistor is connected to the output end of the ignition detection circuit.

[0010] Optionally, the power supply control circuit applied to the gas stove also includes: a second resistor, one end of the second resistor is connected to the control end of the second controlled switch, and the other end is connected to the output end of the ignition detection circuit; a third resistor, one end of the third resistor is connected to the second output end of the second controlled switch, and the other end is grounded.

[0011] Optionally, the burners of the gas stove include: a left burner and a right burner; the ignition switch includes: a first ignition switch and a second ignition switch connected in parallel, the first ignition switch controls the ignition of the left burner, and the second ignition switch controls the ignition of the right burner; the temperature sensor includes: a first thermocouple and a second thermocouple connected in parallel, the first thermocouple is arranged at the left burner, and the second thermocouple is arranged at the right burner.

[0012] Optionally, the first controlled switch and the second controlled switch are transistors.

[0013] Optionally, the first controlled switch is a PNP transistor, and the second controlled switch is an NPN transistor.

[0014] According to the second aspect, an embodiment of the present invention further provides a gas stove, comprising: a power supply, a control chip, and a power supply control circuit applied to the gas stove according to the first aspect and any one of the optional embodiments of the first aspect, wherein the input end of the power supply control circuit applied to the gas stove is connected to the power supply, and the output end is connected to the power port of the control chip.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. The power supply control circuit for gas stoves provided in the embodiment of the present invention comprises: a first controlled switch, a first output end of the first controlled switch is externally connected to a power supply, and a second output end is connected to a power port of a built-in control chip of the gas stove; an ignition detection circuit, an input end of the ignition detection circuit is externally connected to a first signal, the first signal is a temperature signal at the burner of the gas stove, and the output end is connected to a control end of the first controlled switch. Thus, the burner temperature of the gas stove is detected by the ignition detection circuit, and the first controlled switch is controlled to be turned on only when a flame is detected on the burner, so as to supply power to the built-in control chip of the gas stove, thereby ensuring that the gas stove is powered only when the user is using the gas stove, and the power supply is cut off when the user turns off the gas stove or the gas stove is abnormally extinguished, thereby solving the problem of battery power consumption when the gas stove is not in use, saving energy and protecting the environment, and improving the battery life. In addition, the power supply control circuit for gas stoves provided in the embodiment of the present invention has the advantages of simple circuit structure and low cost, and is easy to implement in products.

[0017] 2. The gas stove provided in an embodiment of the present invention comprises: a power supply, a control chip and a power supply control circuit applied to the gas stove provided in another embodiment of the present invention, wherein the input end of the power supply control circuit applied to the gas stove is connected to the power supply, and the output end is connected to the power port of the control chip. Thus, through the design of the power supply control circuit, it is ensured that the gas stove is powered only when the user is using the gas stove, and the power supply is cut off when the user turns off the gas stove or the gas stove is abnormally extinguished, thereby solving the problem of battery power consumption when the gas stove is not in use, saving energy and protecting the environment, and increasing the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a power supply control circuit applied to a gas stove according to an embodiment of the present invention;

[0020] Figure 2 Another structural schematic diagram of a power supply control circuit applied to a gas stove according to an embodiment of the present invention;

[0021] Figure 3 Another structural schematic diagram of a power supply control circuit applied to a gas stove according to an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the structure of a gas stove according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] The technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Figure 1 The schematic diagram of the structure of the power supply control circuit applied to the gas stove is shown in FIG. Figure 1 As shown, the power supply control circuit includes: a first controlled switch Q1, a first output end of the first controlled switch Q1 is externally connected to a power supply VCC, and a second output end is connected to a power port of a built-in control chip MCU of a gas stove; an ignition detection circuit 1, an input end of the ignition detection circuit 1 is externally connected to a first signal, the first signal is a temperature signal at the burner of the gas stove, and an output end is connected to a control end of the first controlled switch Q1. In practical applications, the ignition detection circuit 1 is used to detect the temperature signal at the burner, and convert the temperature signal into a level signal to control the on or off of the first controlled switch Q1, thereby controlling the power supply or power off of the built-in control chip MCU of the gas stove. It should be noted that in the embodiment of the present invention, the power supply VCC is described as a dry battery as an example. In practical applications, the power supply VCC can also be other power supplies VCC commonly used in gas stoves, such as: batteries, etc., and the present invention is not limited thereto.

[0026] Specifically, in one embodiment, if Figure 1As shown, the above-mentioned ignition detection circuit 1 includes: a temperature sensor 11, which is arranged at the burner of the gas stove; a comparator U1, a first input end of the comparator U1 is externally connected to a level signal, a second input end is connected to the temperature sensor 11, and an output end is connected to the control end of the first controlled switch Q1. In actual application, the temperature sensor 11 detects the temperature signal at the burner of the gas stove, and converts the temperature signal into a voltage signal and inputs it into the second input terminal of the comparator U1. The level signal externally connected to the first input terminal of the comparator U1 is a preset voltage signal. The received voltage signal and the preset voltage signal are compared by the comparator U1. In an embodiment of the present invention, when the voltage signal is greater than the preset voltage signal, it is determined that there is a flame on the burner, that is, the gas stove is in use. At this time, the comparator U1 outputs a low-level signal to control the first controlled switch Q1 to be turned on, and power is supplied to the control chip MCU built into the gas stove; and when the voltage signal is less than the preset voltage signal, it is determined that there is no flame on the burner, that is, the gas stove is not in use or is in an abnormal flameout state. At this time, the comparator U1 outputs a high-level signal to control the first controlled switch Q1 to be turned off, thereby cutting off the power supply VCC of the control chip MCU built into the gas stove. It should be noted that the level signal and the preset voltage signal output by the comparator U1 after comparing the received voltage signal with the preset voltage signal can be adjusted and set according to the actual needs of the circuit. For example, after the gas stove is actually ignited, the size of the voltage signal detected by the thermocouple corresponding to the different degrees of flame controlled by the knob switch can be experimented, and the size of the preset voltage signal can be reasonably set according to the variation range of the obtained voltage signal. The present invention is not limited to this.

[0027] Specifically, in one embodiment, if Figure 2 As shown, the power supply control circuit applied to the gas stove also includes: a second controlled switch Q2, the control end of the second controlled switch Q2 is connected to the output end of the ignition detection circuit 1, the first output end is connected to the control end of the first controlled switch Q1, and the second output end is grounded.

[0028] Specifically, in one embodiment, if Figure 2As shown, the ignition detection circuit 1 includes: a temperature sensor 11, which is arranged at the burner of the gas stove; a comparator U1, wherein the first input terminal of the comparator U1 is externally connected to a level signal, the second input terminal is connected to the temperature sensor 11, and the output terminal is connected to the control terminal of the first controlled switch Q1. In practical applications, the temperature sensor 11 detects the temperature signal at the burner of the gas stove, and converts the temperature signal into a voltage signal and inputs it into the second input terminal of the comparator U1. The level signal externally connected to the first input terminal of the comparator U1 is a preset voltage signal. The received voltage signal and the preset voltage signal are compared by the comparator U1. When the voltage signal is greater than the preset voltage signal, it is determined that there is a flame on the burner, that is, the gas stove is in use. At this time, a low-level signal is output to control the first controlled switch Q1 to turn on, and power is supplied to the control chip MCU built into the gas stove; and when the voltage signal is less than the preset voltage signal, it is determined that there is no flame on the burner, that is, the gas stove is not in use or is in an abnormal flameout state. At this time, a high-level signal is output to control the first controlled switch Q1 to turn off, thereby cutting off the power supply VCC of the control chip MCU built into the gas stove. It should be noted that the above-mentioned preset voltage signal can be set according to actual needs, and the present invention is not limited thereto.

[0029] Specifically, in one embodiment, if Figure 2 As shown, the power supply control circuit applied to the gas stove also includes: an ignition switch 2, and the two ends of the ignition switch 2 are respectively connected to the first output end and the second output end of the first controlled switch Q1. In practical applications, the burners of the gas stove include: a left burner and a right burner; the ignition switch includes: a first ignition switch K1 and a second ignition switch K2 connected in parallel, the first ignition switch K1 controls the ignition of the left burner, and the second ignition switch K2 controls the ignition of the right burner; the temperature sensor 11 includes: a first thermocouple 111 and a second thermocouple 112 connected in parallel, the first thermocouple 111 is arranged at the left burner, and the second thermocouple 112 is arranged at the right burner. Specifically, the first ignition switch K1 and the second ignition switch K2 are both knob switches, and the first thermocouple 111 and the second thermocouple 112 are temperature sensing elements that can directly measure the temperature and convert the temperature signal into an electromotive force signal. Therefore, when the corresponding burner of the gas stove is ignited successfully and there is a flame, the thermocouple arranged on the burner can detect the temperature and convert it into a voltage signal.

[0030] Specifically, in one embodiment, if Figure 3As shown, the power supply control circuit applied to the gas stove also includes: an ignition switch 2, wherein the two ends of the ignition switch 2 are respectively connected to the first output end and the second output end of the second controlled switch Q2; a first resistor R1, wherein one end of the first resistor R1 is connected to the control end of the first controlled switch Q1, and the other end is connected to the output end of the ignition detection circuit 1; a second resistor R2, wherein one end of the second resistor R2 is connected to the control end of the second controlled switch Q2, and the other end is connected to the output end of the ignition detection circuit 1; and a third resistor R3, wherein one end of the third resistor R3 is connected to the second output end of the second controlled switch Q2, and the other end is grounded. In actual application, the burners of the above-mentioned gas stove include: a left burner and a right burner; the ignition switch 2 includes: a first ignition switch K1 and a second ignition switch K2 connected in parallel, the first ignition switch K1 controls the ignition of the left burner, and the second ignition switch K2 controls the ignition of the right burner; the temperature sensor 11 includes: a first thermocouple 111 and a second thermocouple 112 connected in parallel, the first thermocouple 111 is arranged at the left burner, and the second thermocouple 112 is arranged at the right burner. In an embodiment of the present invention, the power supply control circuit applied to the gas stove also includes: a first capacitor C1 and a second capacitor C2 connected in parallel, one end of the first capacitor C1 is connected to one end of the second capacitor C2 and then connected to the second output end of the first controlled switch Q1, the other end of the first capacitor C1 is connected to the other end of the second capacitor C2 and then connected to the ground end of the control chip MCU and then grounded. In the embodiment of the present invention, the above-mentioned first capacitor C1 is an electrolytic capacitor, and the second capacitor C2 is an ordinary capacitor. The first capacitor C1 and the second capacitor C2 play a filtering role on the input voltage of the control chip MCU.

[0031] In practical applications, the first controlled switch Q1 and the second controlled switch Q2 are transistors. It should be noted that in the embodiment of the present invention, the first controlled switch Q1 is a PNP transistor and the second controlled switch Q2 is an NPN transistor. In practical applications, other switch devices can also be used as long as they can achieve the same function as the above-mentioned transistors. The present invention is not limited to this.

[0032] In practical applications, in order to further simplify the circuit structure, such as Figure 2 and Figure 3In the power supply control circuit shown for the gas stove, a gas stove built-in control chip MCU with a built-in comparator can also be selected to replace the comparator U1 in the above-mentioned ignition detection circuit 1, so that the voltage signal converted by the above-mentioned temperature sensor 11 from the detected temperature signal is directly input into the control chip MCU by means of the built-in comparator of the control chip MCU, and the above-mentioned first controlled switch Q1 or the second controlled switch Q2 is controlled on and off by comparing the preset voltage signal in the control chip MCU with the received voltage signal and outputting the corresponding level signal through the output pin of the control chip MCU, thereby realizing low-power power supply to the control chip MCU, solving the problem of battery power consumption when the gas stove is not in use, and improving the battery life.

[0033] The working principle and working process of the power supply control circuit applied to the gas stove provided by the embodiment of the present invention will be described in detail below in conjunction with specific application examples.

[0034] like Figure 1 In the power supply control circuit shown for the gas stove, when the gas stove is in standby mode, the transistor Q1 is cut off, and the control chip MCU built into the gas stove is not powered, so the gas stove does not consume power. When the user presses the button switch corresponding to the two burners of the gas stove, the control chip MCU is powered and starts working. At this time, if the user successfully ignites, the thermocouple corresponding to the ignition burner detects the temperature signal and converts it into a voltage signal and inputs it into the comparator U1. The comparator U1 compares the voltage signal with the preset voltage signal. Since the voltage signal is greater than the preset voltage signal, the comparator U1 outputs a low level and the transistor Q1 is turned on. At this time, even if the user releases the knob switch, the transistor Q1 will be turned on, so the control chip MCU can continue to work. Because the user may not be able to ignite successfully after pressing the knob, or the gas stove flame may go out during normal use after successful ignition (blown out by wind, water or soup, etc.). At this time, since the thermocouple does not detect the temperature of the flame, the converted voltage signal is less than the preset voltage signal, the comparator U1 outputs a high level, the transistor Q1 is cut off, the control chip MCU has no power supply voltage and stops working, and the battery does not consume power at this time.

[0035] like Figure 2 or Figure 3In the power supply control circuit shown for the gas stove, when the gas stove is in standby mode, the transistor Q1 is cut off, and the control chip MCU built into the gas stove is not powered, and the gas stove does not consume power. When the user presses the button switch corresponding to the two burners of the gas stove, the transistor Q1 is turned on, the control chip MCU is powered, and starts working. At this time, if the user successfully ignites, the thermocouple corresponding to the ignition burner detects the temperature signal and converts it into a voltage signal and inputs it into the comparator U1. The comparator U1 compares the voltage signal with the preset voltage signal. Since the voltage signal is greater than the preset voltage signal, the comparator U1 outputs a high level, and the transistor Q2 is turned on. At this time, even if the user releases the knob switch, the transistor Q1 will be turned on, so the control chip MCU can continue to work. Because the user may not be able to ignite successfully after pressing the knob, or the gas stove flame may go out during normal use after successful ignition (blown out by wind, water or soup, etc.). At this time, since the thermocouple does not detect the temperature of the flame, the converted voltage signal is less than the preset voltage signal, the comparator U1 outputs a low level, the transistor Q2 is cut off, the Q1 transistor is also cut off, the control chip MCU has no power supply voltage and stops working, and the battery does not consume power at this time.

[0036] Through the coordinated cooperation of the above-mentioned components, the power supply control circuit applied to the gas stove provided by the embodiment of the present invention detects the temperature of the gas stove burner through the ignition detection circuit, and controls the first controlled switch to be turned on only when a flame is detected on the burner, so as to supply power to the built-in control chip of the gas stove, thereby ensuring that the gas stove is powered only when the user is using the gas stove, and the power supply is cut off when the user turns off the gas stove or the gas stove is abnormally extinguished, thereby solving the problem of battery power consumption when the gas stove is not in use, saving energy and protecting the environment, and improving the battery life. In addition, the power supply control circuit applied to the gas stove provided by the embodiment of the present invention has the advantages of simple circuit structure and low cost, and is easy to implement in products.

[0037] The embodiment of the present invention also provides a gas stove, such as Figure 4 As shown, the gas stove includes: a power supply VCC, a control chip MCU and a power supply control circuit 3 applied to the gas stove in another embodiment of the present invention, wherein the input end of the power supply control circuit 3 is connected to the power supply VCC, and the output end is connected to the power port of the control chip MCU. The detailed description of the power supply control circuit 3 refers to the relevant description of another embodiment of the present invention, which will not be repeated here.

[0038] Through the coordinated cooperation of the above-mentioned components, the gas stove provided in the embodiment of the present invention, through the design of the power supply control circuit, ensures that the gas stove is powered only when the user is using the gas stove. The power supply is cut off when the user turns off the gas stove or the gas stove is abnormally extinguished, thereby solving the problem of battery power consumption when the gas stove is not in use, saving energy and protecting the environment, and improving the battery life.

[0039] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A power supply control circuit applied to a gas stove, characterized in that: include: a first controlled switch, wherein a first output end of the first controlled switch is externally connected to a power supply, and a second output end of the first controlled switch is connected to a power port of a built-in control chip of the gas stove; an ignition detection circuit, wherein an input end of the ignition detection circuit is externally connected to a first signal, wherein the first signal is a temperature signal at a burner of the gas stove, and an output end of the ignition detection circuit is connected to a control end of the first controlled switch; The ignition detection circuit comprises: A temperature sensor is arranged at the burner of the gas stove, the temperature sensor detects a temperature signal at the burner of the gas stove, and converts the temperature signal into a voltage signal and inputs it into the second input terminal of the comparator; A comparator, wherein a first input terminal of the comparator is connected to an external level signal, a second input terminal is connected to the temperature sensor, and an output terminal is connected to a control terminal of the first controlled switch; The level signal externally connected to the first input terminal of the comparator is a preset voltage signal. The received voltage signal and the preset voltage signal are compared by the comparator. When the voltage signal is greater than the preset voltage signal, it is determined that there is a flame on the burner, and a low-level signal is output to control the first controlled switch to be turned on to supply power to the control chip built into the gas stove; when the voltage signal is less than the preset voltage signal, it is determined that there is no flame on the burner, and a high-level signal is output to control the first controlled switch to be turned off to cut off the power supply of the control chip built into the gas stove.

2. The power supply control circuit for a gas stove according to claim 1, characterized in that: Also includes: A second controlled switch, wherein the control end of the second controlled switch is connected to the output end of the ignition detection circuit, the first output end is connected to the control end of the first controlled switch, and the second output end is grounded.

3. The power supply control circuit for a gas stove according to claim 2, characterized in that: Also includes: An ignition switch, wherein two ends of the ignition switch are respectively connected to the first output end and the second output end of the first controlled switch, or are connected to the first output end and the second output end of the second controlled switch.

4. The power supply control circuit for a gas stove according to claim 1, characterized in that: Also includes: A first resistor, one end of the first resistor is connected to the control end of the first controlled switch, and the other end of the first resistor is connected to the output end of the ignition detection circuit.

5. The power supply control circuit for a gas stove according to claim 2, characterized in that: Also includes: a second resistor, one end of the second resistor being connected to the control end of the second controlled switch, and the other end of the second resistor being connected to the output end of the ignition detection circuit; A third resistor, one end of the third resistor is connected to the second output end of the second controlled switch, and the other end of the third resistor is grounded.

6. The power supply control circuit for a gas stove according to claim 3, characterized in that: The burners of the gas stove include: a left burner and a right burner; The ignition switch comprises: a first ignition switch and a second ignition switch connected in parallel, the first ignition switch controls the ignition of the left stove burner, and the second ignition switch controls the ignition of the right stove burner; The temperature sensor includes: a first thermocouple and a second thermocouple connected in parallel, wherein the first thermocouple is arranged at the left stove burner, and the second thermocouple is arranged at the right stove burner.

7. The power supply control circuit for a gas stove according to claim 2, characterized in that: The first controlled switch and the second controlled switch are transistors.

8. The power supply control circuit for a gas stove according to claim 7, characterized in that: The first controlled switch is a PNP transistor, and the second controlled switch is an NPN transistor.

9. A gas stove, characterized in that: include: A power supply, a control chip, and a power supply control circuit applied to a gas stove as described in any one of claims 1 to 8, wherein the input end of the power supply control circuit applied to the gas stove is connected to the power supply, and the output end is connected to the power port of the control chip.

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