CN110645601A - Key detection device of gas stove and gas stove - Google Patents
Key detection device of gas stove and gas stove Download PDFInfo
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- CN110645601A CN110645601A CN201911029748.3A CN201911029748A CN110645601A CN 110645601 A CN110645601 A CN 110645601A CN 201911029748 A CN201911029748 A CN 201911029748A CN 110645601 A CN110645601 A CN 110645601A
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- 238000001514 detection method Methods 0.000 title claims abstract description 85
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
Abstract
The application relates to a button detection device and gas-cooker of gas-cooker, button detection device button state detection circuit and power supply control circuit, button state detection circuit is used for connecting the power supply battery and the key switch of gas-cooker, and power supply control circuit connects case state detection circuit, still is used for connecting the controller of power supply battery and gas-cooker. The key state detection circuit is used for detecting the state of the key switch and outputting the level of the corresponding type to the power supply control circuit, so that the power supply control circuit stops supplying power to the controller of the gas stove when the key switch is in an open state, and the voltage output by the power supply battery is accessed to supply power to the controller when the key switch is in a closed state, thereby ensuring that the controller can normally work. Therefore, when the gas stove is in a standby state and the key switch is in an open state, the power supply control circuit enables the controller not to be powered on, so that the controller does not consume power in the standby state of the gas stove, the power consumption of the gas stove is reduced, and the service life of a power supply battery is prolonged.
Description
Technical Field
The application relates to the technical field of electrical equipment, in particular to a key detection device of a gas stove and the gas stove.
Background
With the development of science and technology and the continuous improvement of the living standard of people, intelligent household electrical appliances have been advanced to the lives of people. As a necessary daily use article for a kitchen, a traditional mechanical cooker cannot meet the pursuit of people, and an intelligent cooker becomes a sale hotspot.
Because of the problem of safety, most of gas stoves on the market are powered by dry batteries. Due to diversification of functions of the gas stove, power consumption of the battery is obviously increased, the service life of the battery is shortened, and how to reduce power consumption of the gas stove and prolong the service life of the battery is a problem to be solved urgently.
Disclosure of Invention
In view of the above, it is necessary to provide a key detection device for a gas cooker and a gas cooker, which can reduce power consumption of the gas cooker and prolong the service life of a battery, in order to solve the problem of reduction of the service life of the battery of the gas cooker.
A key detection device of a gas stove comprises: the gas stove comprises a key state detection circuit and a power supply control circuit, wherein the key state detection circuit is used for connecting a power supply battery and a key switch of the gas stove, and the power supply control circuit is connected with the key state detection circuit and is also used for connecting the power supply battery and a controller of the gas stove;
the key state detection circuit is used for detecting the state of the key switch, outputting a first type level to the power supply control circuit when the key switch is in an open state, and outputting a second type level to the power supply control circuit when the key switch is in a closed state; the power supply control circuit is used for being switched off when receiving a first type level and being switched on when receiving a second type level, and the power supply control circuit is switched on to supply power to the controller by voltage output by the power supply battery.
In one embodiment, the key switch comprises a first key switch and a second key switch, and the key state detection circuit comprises a first resistor, a second resistor and a third resistor;
one end of the first resistor is connected with the power supply battery, the other end of the first resistor is connected with the first end of the first key switch and the first end of the second key switch, and the other end of the first resistor is also connected with the power supply control circuit;
one end of the second resistor is connected with the second end of the first key switch, and the other end of the second resistor is grounded; one end of the third resistor is connected with the second end of the second key switch, and the other end of the third resistor is grounded.
In one embodiment, the power supply control circuit includes a first switch tube and a voltage boost circuit, an input end of the first switch tube is connected to the power supply battery, an output end of the first switch tube is connected to an input end of the voltage boost circuit, a control end of the first switch tube is connected to the key state detection circuit, and an output end of the voltage boost circuit is connected to the controller.
In one embodiment, the power supply control circuit further includes a second switch tube, a fourth resistor, and a fifth resistor, an input end of the second switch tube is connected to the control end of the first switch tube through the fourth resistor, the control end of the second switch tube is connected to the controller through the fifth resistor, and an output end of the second switch tube is grounded.
In one embodiment, the key detection device further comprises a signal processing circuit, the signal processing circuit is connected with the common terminal of the key switch and the key state detection circuit, and the signal processing circuit is further used for being connected with the controller;
the signal processing circuit is used for outputting a first type level to the controller when the level flowing through the key switch after being closed is greater than or equal to a preset level threshold value, and outputting a second type level to the controller when the level flowing through the key switch after being closed is less than the preset level threshold value.
In one embodiment, the key switches comprise a first key switch and a second key switch, and the signal processing circuit comprises a first comparison circuit and a second comparison circuit;
the first comparison circuit is connected with the first key switch and the public end of the key state detection circuit, the first comparison circuit is also used for being connected with the controller, the second comparison circuit is connected with the second key switch and the public end of the key state detection circuit, and the second comparison circuit is also used for being connected with the controller.
In one embodiment, the first comparison circuit comprises a first comparator, a fifth resistor, a sixth resistor and a seventh resistor, wherein the fifth resistor and the sixth resistor are connected in series, a common end of the fifth resistor and the sixth resistor is connected with an inverting input end of the first comparator, the other end of the fifth resistor is connected with the power supply control circuit, and the other end of the sixth resistor is grounded; the non-inverting input end of the first comparator is connected with the first key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the seventh resistor.
In one embodiment, the first comparison circuit comprises a first comparator, a fifth resistor, a sixth resistor and a seventh resistor, wherein the fifth resistor and the sixth resistor are connected in series, a common end of the fifth resistor and the sixth resistor is connected with an inverting input end of the first comparator, the other end of the fifth resistor is grounded, and the other end of the sixth resistor is connected with an output end of the first comparator; the non-inverting input end of the first comparator is connected with the first key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the seventh resistor.
In one embodiment, the second comparison circuit comprises a second comparator, an eighth resistor, a ninth resistor and a tenth resistor, wherein the eighth resistor and the ninth resistor are connected in series, a common end of the eighth resistor and the ninth resistor is connected with an inverting input end of the second comparator, the other end of the eighth resistor is connected with the power supply control circuit, and the other end of the ninth resistor is grounded; the non-inverting input end of the second comparator is connected with the second key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the tenth resistor.
In one embodiment, the second comparison circuit comprises a second comparator, an eighth resistor, a ninth resistor and a tenth resistor, wherein the eighth resistor and the ninth resistor are connected in series, a common end of the eighth resistor and the ninth resistor is connected with an inverting input end of the second comparator, the other end of the eighth resistor is grounded, and the other end of the ninth resistor is connected with an output end of the second comparator; the non-inverting input end of the second comparator is connected with the second key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the tenth resistor.
A gas stove comprises a key switch, a power supply battery, a controller and the key detection device.
According to the key detection device of the gas stove and the gas stove, the key state detection circuit is used for detecting the state of the key switch and outputting the level of the corresponding type to the power supply control circuit, so that the power supply control circuit stops supplying power to the controller of the gas stove when the key switch is in the open state, and the voltage output by the power supply battery is accessed to supply power to the controller when the key switch is in the closed state, so that the controller can work normally. Therefore, when the gas stove is in a standby state and the key switch is in an open state, the power supply control circuit enables the controller not to be powered on, so that the controller does not consume power in the standby state of the gas stove, the power consumption of the gas stove is reduced, and the service life of a power supply battery is prolonged.
Drawings
Fig. 1 is a block diagram illustrating a structure of a key detection device of a gas range according to an embodiment;
FIG. 2 is a schematic diagram of a key detection device of a gas range according to an embodiment;
fig. 3 is a schematic structural diagram of a key detection device of a gas stove in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, there is provided a key detection apparatus of a gas range, as shown in fig. 1, including: the gas stove comprises a key state detection circuit 110 and a power supply control circuit 120, wherein the key state detection circuit 110 is used for being connected with a key switch 210 and a power supply battery 220 of the gas stove, and the power supply control circuit 120 is connected with the key state detection circuit 110 and is also used for being connected with the power supply battery 220 and a controller 230 of the gas stove.
The key state detection circuit 110 is configured to detect a state of the key switch 210, output a first type of level to the power supply control circuit 120 when the key switch 210 is in an open state, and output a second type of level to the power supply control circuit 120 when the key switch 210 is in a closed state; the power supply control circuit 120 is configured to turn off when receiving the first type level, turn on when receiving the second type level, and switch in the voltage output by the power supply battery 220 to supply power to the controller 230 when the power supply control circuit 120 is turned on.
Specifically, the key switch 210 serves to ignite and control ventilation of the burner of the gas range. The number of the key switches 210 is not exclusive and may be one or two. For convenience of description, the number of the key switches 210 is two, and the two key switches 210 may be referred to as left/right key switches, and respectively control the left/right burner of the gas stove. The key state detection circuit 110 monitors states of the left and right key switches 210 of the gas cooker and generates corresponding levels to the power supply control circuit 120.
The specific types of the first type level and the second type level are not unique, the first type level may be a high level/a low level, and the second type level corresponds to a low level/a high level. In this embodiment, the first type level is a high level, and the second type level is a low level. The specific voltage amplitudes of the high level and the low level are not unique, and only the requirement that the voltage amplitude of the high level is higher than that of the low level is met, the high level can control the power supply control circuit 120 to be switched off, and the low level can control the power supply control circuit 120 to be switched on.
When the gas range is in the standby state, the left and right key switches 210 are in the on state. When the key state detection circuit 110 detects that the key switch 210 is in the on state, it outputs a high level to the power supply control circuit 120 to turn off the power supply control circuit 120, so that the controller 230 does not consume power in the standby state of the gas stove. When a user presses the left/right key switch, the key state detection circuit 110 detects that the key switch is closed, and outputs a low level to the power supply control circuit 120, so that the power supply control circuit 120 is turned on, and the voltage output by the power supply battery 220 is connected to supply power to the controller 230. At this time, the controller 230 controls the operation of the burner corresponding to the gas range according to the actually closed left/right key switch.
The key detection device of the gas stove detects the state of the key switch 210 by using the key state detection circuit 110 and outputs the level of the corresponding type to the power supply control circuit 120, so that the power supply control circuit 120 stops supplying power to the controller 230 of the gas stove when the key switch 210 is in an open state, and the voltage output by the power supply battery 220 is accessed to supply power to the controller 230 when the key switch 210 is in a closed state, thereby ensuring that the controller 230 can normally work. Thus, when the gas stove is in a standby state and the key switch 210 is in an open state, the power supply control circuit 120 enables the controller 230 not to be powered on, so that the controller 230 does not consume power in the standby state of the gas stove, the power consumption of the gas stove is reduced, and the service life of the power supply battery 220 is prolonged.
The specific structure of the key status detecting circuit 110 will also correspond to different numbers of the key switches 210. In one embodiment, as shown in fig. 2, the key switch 210 includes a first key switch K1 and a second key switch K2, and the key state detection circuit 110 includes a first resistor R70, a second resistor R1 and a third resistor R2. One end of the first resistor R70 is connected to the power supply battery 220 for accessing battery voltage, the other end of the first resistor R70 is connected to the first end of the first key switch K1 and the first end of the second key switch K2, and the other end of the first resistor R70 is further connected to the power supply control circuit 120. One end of the second resistor R1 is connected with the second end of the first key switch K1, and the other end of the second resistor R1 is grounded; one end of the third resistor R2 is connected to the second end of the second key switch K2, and the other end of the third resistor R2 is grounded.
Specifically, the first key switch K1 and the second key switch K2 are left/right key switches of the gas range, respectively. When the gas stove is in a standby state, the left/right key switch is in an on state, and the voltage of the accessed battery passes through the first resistor R70 and then outputs a high level to the power supply control circuit 120, so that the power supply control circuit 120 is in an off state. When the user presses the left/right key switch, the first key switch K1 or the second key switch K2 is turned on, and a low level is output to the power supply control circuit 120 through the voltage division of the first resistor R70, the second resistor R1 and the third resistor R2, so that the power supply control circuit 120 is in a conducting state, and the battery voltage is accessed to supply power to the controller 230.
In this embodiment, the key state detection circuit 110 composed of the first resistor R70, the second resistor R1 and the third resistor R2 is used to detect the state of the key switch 210, which is simple, fast and low in cost.
Further, in an embodiment, with reference to fig. 2 continuously, the power supply control circuit 120 includes a first switch tube U7 and a voltage boost circuit 122, an input terminal of the first switch tube U7 is connected to the power supply battery 220, an output terminal of the first switch tube U7 is connected to an input terminal of the voltage boost circuit 122, a control terminal of the first switch tube U7 is connected to the key state detection circuit 110, specifically, to an end of the first resistor R70 in the key state detection circuit 110 away from the power supply battery 220, and an output terminal of the voltage boost circuit 122 is connected to the controller 230. In this embodiment, the first switching tube U7 may be a MOS tube or a triode, and the first switching tube U7 is a P-channel MOS tube, and has a gate as a control end, a source as an input end, and a drain as an output end. In other embodiments, the first switch tube U7 may also be a PNP transistor. The boost circuit 122 may specifically employ a DC-DC boost circuit.
The corresponding level is output according to the state of the key switch 210 detected by the key state detection circuit 110 to control the on-off of the first switch tube U7, the boost circuit 122 boosts the voltage of the accessed battery when the first switch tube U7 is switched on and then supplies power to the controller 230, the situation that insufficient power is supplied to the controller 230 due to the fact that the power of the power supply battery 220 is too low is avoided, and the use reliability of the gas stove is improved.
Further, in an embodiment, the power supply control circuit 120 further includes a second switch Q14, a fourth resistor R49, and a fifth resistor R59, an input terminal of the second switch Q14 is connected to the control terminal of the first switch U7 through the fourth resistor R49, a control terminal of the second switch Q14 is connected to the controller 230 through the fifth resistor R59, and an output terminal of the second switch Q14 is grounded. In this embodiment, the second switching tube Q14 may also be an MOS tube or an audion, and the second switching tube Q14 is an NPN audion, with a base as a control end, a collector as an input end, and an emitter as an output end. In other embodiments, the second switching transistor Q14 may also be a MOS transistor.
Specifically, the voltage boost circuit 122 is connected to a power supply terminal VCC of the controller 230, the control terminal of the second switching tube Q14 is connected to an I/0 port of the controller 230 through the fifth resistor R59, the controller 230 outputs a high level through the I/O port after being powered on, and the second switching tube Q14 is controlled to be turned on, so that the first switching tube U7 is continuously turned on, the controller 230 is self-locked and normally powered on to work all the time, and the use reliability of the gas stove is also improved. In addition, when the user needs to control the gas stove to enter the standby state again, after the left/right key switch is turned off, a standby command may be sent to the controller 230 through the standby button, and the controller 230 controls the second switching tube Q14 to be turned off, so that the first switching tube U7 is turned off, thereby stopping power supply to the controller 230.
In one embodiment, as shown in fig. 2, the key detection apparatus further includes a signal processing circuit 130, the signal processing circuit 130 is connected to a common terminal of the key switch 210 and the key state detection circuit 110, and the signal processing circuit 130 is further connected to the controller 230. The signal processing circuit 130 is configured to output a first type level to the controller 230 when the level flowing through the key switch 210 after being turned on is greater than or equal to a preset level threshold, and output a second type level to the controller 230 when the level flowing through the key switch 210 after being turned on is less than the preset level threshold.
The specific value of the preset level threshold is not unique, and can be adjusted by changing device parameters in the signal processing circuit 130 according to actual requirements. Similarly, for example, when the key switch 210 is turned on, the first type level is a high level, and the second type level is a low level, the corresponding level is output to the controller 230 according to the actual magnitude of the level flowing through the key switch 210, so as to avoid the problem that the controller 230 cannot detect the state of the key switch 210 due to the too small level flowing through the key switch 210 when the power supply of the power supply battery 220 is insufficient. The controller 230 can accurately detect the state of the key switch 210 according to the level signal sent by the signal processing circuit 130, thereby controlling the burner and improving the control reliability of the gas stove.
Correspondingly, also taking the example that the key switches 210 include the first key switch K1 and the second key switch K2, the signal processing circuit 130 includes the first comparison circuit 132 and the second comparison circuit 134. The first comparison circuit 132 is connected to the common terminal of the first key switch K1 and the key state detection circuit 110, the first comparison circuit 132 is further connected to the controller 230, the second comparison circuit 134 is connected to the common terminal of the second key switch K2 and the key state detection circuit 110, and the second comparison circuit 134 is further connected to the controller 230.
The first comparing circuit 132 is configured to detect a level flowing through the first key switch K1 and output a corresponding level signal to the controller 230, the second comparing circuit 134 is configured to detect a level flowing through the second key switch K2 and output a corresponding level signal to the controller 230, and the first comparing circuit 132 and the second comparing circuit 134 are configured to detect levels flowing through the first key switch K1 and the second key switch K2 and output corresponding level signals to the controller 230, so that the controller 230 can accurately identify states of the first key switch K1 and the second key switch K2, and the detection accuracy is high.
The specific structures of the first comparison circuit 132 and the second comparison circuit 134 are not exclusive, and in one embodiment, as shown in fig. 2, the first comparison circuit 132 includes a first comparator U1-a, a fifth resistor R3, a sixth resistor R4 and a seventh resistor R7, a common terminal of the fifth resistor R3 and the sixth resistor R4 is connected in series to an inverting input terminal of the first comparator U1-a, the other terminal of the fifth resistor R3 is connected to the power supply control circuit 120, specifically to the output terminal of the voltage boost circuit 122 in the power supply control circuit 120, and the other terminal of the sixth resistor R4 is grounded. The non-inverting input terminal of the first comparator U1-A is connected to the common terminal of the first key switch K1 and the key state detecting circuit 110, and the output terminal of the first comparator U1-A is connected to the controller 230 through a seventh resistor R7.
Specifically, taking the first key switch K1 as an example of a left key switch of a gas stove, the non-inverting input terminal of the first comparator U1-a is connected to the common terminal of the first key switch K1 and the second resistor R1, and the output terminal of the first comparator U1-a is connected to the left switch detection port of the controller 230 through the seventh resistor R7. The value of the preset level threshold can be adjusted by setting the resistance values of the fifth resistor R3 and the sixth resistor R4, and if the detected voltage flowing through the first key switch K1 is smaller than the preset level threshold, the output end of the first comparator U1-A outputs a low level; otherwise, the output of the first comparator U1-A outputs a high level.
Correspondingly, in one embodiment, the second comparing circuit 134 includes a second comparator U1-B, an eighth resistor R6, a ninth resistor R5 and a tenth resistor R8, the eighth resistor R6 and the ninth resistor R5 are connected in series and then connected in common to the inverting input terminal of the second comparator U1-B, the other end of the eighth resistor R6 is connected to the power supply control circuit 120, specifically to the output terminal of the voltage boosting circuit 122 in the power supply control circuit 120, and the other end of the ninth resistor R5 is grounded. The non-inverting input terminal of the second comparator U1-B is connected to the common terminal of the second key switch K2 and the key status detecting circuit 110, and the output terminal of the first comparator U1-B is connected to the controller 230 through the tenth resistor R8.
Specifically, taking the second key switch K2 as an example of a right key switch of a gas stove, the non-inverting input terminal of the second comparator U1-B is connected to the common terminal of the second key switch K2 and the third resistor R2, and the output terminal of the first comparator U1-B is connected to the right switch detection port of the controller 230 through the tenth resistor R8. The value of the preset level threshold can be adjusted by setting the resistance values of the eighth resistor R6 and the ninth resistor R5, and if the detected voltage flowing through the second key switch K2 is smaller than the preset level threshold, the output end of the second comparator U1-B outputs a low level; otherwise, the output terminal of the second comparator U1-B outputs a high level.
In another embodiment, as shown in fig. 3, the key switch 210 includes a first key switch K3 and a second key switch K4, the key state detection circuit 110 includes a first resistor R9, a second resistor R12 and a third resistor R13, and the power supply control circuit 120 includes a first switch tube U2, a voltage boost circuit 122, a second switch tube Q1, a fourth resistor R10 and a fifth resistor R11. The specific connection relationship between the components in the key state detection circuit 110 and the power supply control circuit 120 is the same as that described above, and is not described herein again.
Specifically, the first comparison circuit 132 comprises a first comparator U4-A, a fifth resistor R66, a sixth resistor R67 and a seventh resistor R18, wherein the common end of the fifth resistor R66 and the sixth resistor R67 after being connected in series is connected with the inverting input end of the first comparator U4-A, the other end of the fifth resistor R66 is grounded, and the other end of the sixth resistor R67 is connected with the output end of the first comparator U4-A; the non-inverting input terminal of the first comparator U4-A is connected to the common terminal of the first key switch K3 and the key state detection circuit 110, and is specifically connected to the common terminal of the first key switch K3 and the second resistor R12. The output terminal of the first comparator U4-A is connected to the controller 230 through a seventh resistor R18, and specifically to the left switch detection port of the controller 230.
Further, in one embodiment, the second comparing circuit 134 includes a second comparator U4-B, an eighth resistor R57, a ninth resistor R58 and a tenth resistor R19, the eighth resistor R57 and the ninth resistor R58 are connected in series, and then the common end of the eighth resistor R57 and the ninth resistor R58 is connected to the inverting input end of the second comparator U4-B, the other end of the eighth resistor R57 is grounded, and the other end of the ninth resistor R58 is connected to the output end of the second comparator U4-B; the non-inverting input terminal of the second comparator U4-B is connected to the common terminal of the second key switch K4 and the key state detection circuit 110, and is specifically connected to the common terminal of the second key switch K4 and the third resistor R13. The output terminal of the first comparator U4-B is connected to the controller 230, and more particularly to the right switch detection port of the controller 230, through a tenth resistor R19.
In order to better understand the key detecting device of the gas range, the following detailed explanation is made with reference to specific embodiments.
The working principle of the gas stove is that ignition and ventilation of a left burner and a right burner of the gas stove are respectively and correspondingly controlled through a left button switch and a right button switch, heat generated by gas combustion generates electromotive force through a thermocouple, a current loop is formed with an inner coil of an electromagnetic valve, the electromagnetic valve is kept open to ventilate, and the gas stove works normally. Taking the key detection device shown in fig. 2 as an example, wherein K1 and K2 are key switches of left and right burners of a gas stove; the switch tube U7 is a P-channel MOS tube, and can be replaced by a PNP triode. U1-A, U1-B is a signal comparator, and the switching tube Q14 is an NPN triode and can be replaced by an MOS tube.
When the gas stove is in a standby state, the left/right key switch is in an open state, the switch tube U7 is not conducted, and the controller 230 is not electrified, so that the controller 230 does not consume power in the standby state of the gas stove, and the service life of a battery is prolonged.
When a user presses the left/right key switch, the key switch K1/K2 is closed, the voltage is divided by the resistors R70 and R1/R2 to enable the switch tube U7 to be conducted, the I/O port outputs high level after the controller 230 is powered on, the switch tube Q14 is conducted, and the controller 230 is self-locked and always works normally in a powered-on mode. Meanwhile, the controller 230 determines the actual operation of the user to control the operation of the corresponding burner of the gas stove by detecting the level of the left/right key switch node.
When the battery power is too low, the level V0 divided by the resistors R70, R1/R2 is too low after the left/right key switch is closed, and the detection range of the controller 230 cannot be satisfied. By adding a comparator, the level V0 is compared with a comparator threshold voltage Vref (i.e., a preset level threshold), which can be adjusted by a resistor R3(R5), a resistor R4 (R6). If the level V0 is less than the preset level threshold Vref, the comparator outputs a low level of 0, and if the level V0 is greater than the preset level threshold Vref, the comparator outputs a high level. The controller 230 accurately detects the key state through the left/right detection port to realize the control of the left/right burner.
Through the key detection device, the gas stove cuts off the power supply under the normal standby state, the controller 230 does not consume power, and the controller 230 starts to work after the left/right switch of the gas stove is closed. Under the condition of low voltage of the battery, the controller 230 can accurately detect the states of the left and right key switches, control the left and right burner of the gas stove to work, and avoid the phenomenon that the controller does not work after the left/right key switches of the gas stove act under the low voltage of the battery.
In one embodiment, a gas stove is further provided, and the gas stove comprises a key switch, a power supply battery, a controller and the key detection device. The controller may be an MCU (Micro Control Unit).
According to the gas stove, the state of the key switch is detected by the key state detection circuit, the level of the corresponding type is output to the power supply control circuit, the power supply control circuit stops supplying power to the controller of the gas stove when the key switch is in the open state, and the voltage output by the power supply battery is accessed to supply power to the controller when the key switch is in the closed state, so that the controller can work normally. Therefore, when the gas stove is in a standby state and the key switch is in an open state, the power supply control circuit enables the controller not to be powered on, so that the controller does not consume power in the standby state of the gas stove, the power consumption of the gas stove is reduced, and the service life of a power supply battery is prolonged.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A key detection device of a gas stove is characterized by comprising: the gas stove comprises a key state detection circuit and a power supply control circuit, wherein the key state detection circuit is used for connecting a power supply battery and a key switch of the gas stove, and the power supply control circuit is connected with the key state detection circuit and is also used for connecting the power supply battery and a controller of the gas stove;
the key state detection circuit is used for detecting the state of the key switch, outputting a first type level to the power supply control circuit when the key switch is in an open state, and outputting a second type level to the power supply control circuit when the key switch is in a closed state; the power supply control circuit is used for being switched off when receiving a first type level and being switched on when receiving a second type level, and the power supply control circuit is switched on to supply power to the controller by voltage output by the power supply battery.
2. The apparatus of claim 1, wherein the key switch comprises a first key switch and a second key switch, and the key state detection circuit comprises a first resistor, a second resistor and a third resistor;
one end of the first resistor is connected with the power supply battery, the other end of the first resistor is connected with the first end of the first key switch and the first end of the second key switch, and the other end of the first resistor is also connected with the power supply control circuit;
one end of the second resistor is connected with the second end of the first key switch, and the other end of the second resistor is grounded; one end of the third resistor is connected with the second end of the second key switch, and the other end of the third resistor is grounded.
3. The device according to claim 1, wherein the power supply control circuit includes a first switch tube and a voltage boost circuit, an input terminal of the first switch tube is connected to the power supply battery, an output terminal of the first switch tube is connected to an input terminal of the voltage boost circuit, a control terminal of the first switch tube is connected to the key state detection circuit, and an output terminal of the voltage boost circuit is connected to the controller.
4. The key detection device of claim 3, wherein the power supply control circuit further comprises a second switch tube, a fourth resistor and a fifth resistor, the input terminal of the second switch tube is connected to the control terminal of the first switch tube through the fourth resistor, the control terminal of the second switch tube is connected to the controller through the fifth resistor, and the output terminal of the second switch tube is grounded.
5. The key detection device of claim 1, further comprising a signal processing circuit, wherein the signal processing circuit is connected to a common terminal of the key switch and the key state detection circuit, and the signal processing circuit is further connected to the controller;
the signal processing circuit is used for outputting a first type level to the controller when the level flowing through the key switch after being closed is greater than or equal to a preset level threshold value, and outputting a second type level to the controller when the level flowing through the key switch after being closed is less than the preset level threshold value.
6. The apparatus of claim 5, wherein the key switch comprises a first key switch and a second key switch, and the signal processing circuit comprises a first comparison circuit and a second comparison circuit;
the first comparison circuit is connected with the first key switch and the public end of the key state detection circuit, the first comparison circuit is also used for being connected with the controller, the second comparison circuit is connected with the second key switch and the public end of the key state detection circuit, and the second comparison circuit is also used for being connected with the controller.
7. The key detection device according to claim 6, wherein the first comparison circuit comprises a first comparator, a fifth resistor, a sixth resistor and a seventh resistor, the fifth resistor and the sixth resistor are connected in series, a common end of the fifth resistor and the sixth resistor is connected to an inverting input end of the first comparator, the other end of the fifth resistor is connected to the power supply control circuit, and the other end of the sixth resistor is grounded; the non-inverting input end of the first comparator is connected with the first key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the seventh resistor.
8. The key detection device according to claim 6, wherein the first comparison circuit comprises a first comparator, a fifth resistor, a sixth resistor and a seventh resistor, the fifth resistor and the sixth resistor are connected in series, and then the common terminal is connected to the inverting input terminal of the first comparator, the other terminal of the fifth resistor is grounded, and the other terminal of the sixth resistor is connected to the output terminal of the first comparator; the non-inverting input end of the first comparator is connected with the first key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the seventh resistor.
9. The key detection device of claim 6, wherein the second comparison circuit comprises a second comparator, an eighth resistor, a ninth resistor and a tenth resistor, the eighth resistor and the ninth resistor are connected in series and then connected in common to the inverting input terminal of the second comparator, the other end of the eighth resistor is connected to the power supply control circuit, and the other end of the ninth resistor is grounded; the non-inverting input end of the second comparator is connected with the second key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the tenth resistor.
10. The apparatus according to claim 6, wherein the second comparing circuit comprises a second comparator, an eighth resistor, a ninth resistor and a tenth resistor, the eighth resistor and the ninth resistor are connected in series and then connected in common to the inverting input terminal of the second comparator, the other end of the eighth resistor is grounded, and the other end of the ninth resistor is connected to the output terminal of the second comparator; the non-inverting input end of the second comparator is connected with the second key switch and the common end of the key state detection circuit, and the output end of the first comparator is connected with the controller through the tenth resistor.
11. A gas range comprising a key switch, a power supply battery, a controller and a key detection device as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029748.3A CN110645601A (en) | 2019-10-28 | 2019-10-28 | Key detection device of gas stove and gas stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911029748.3A CN110645601A (en) | 2019-10-28 | 2019-10-28 | Key detection device of gas stove and gas stove |
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| CN110645601A true CN110645601A (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911029748.3A Pending CN110645601A (en) | 2019-10-28 | 2019-10-28 | Key detection device of gas stove and gas stove |
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