CN114326413B

CN114326413B - Detection circuit for household electrical appliance, control method for household electrical appliance, and storage medium

Info

Publication number: CN114326413B
Application number: CN202011063713.4A
Authority: CN
Inventors: 谢丽芳; 郭远久; 杜祖静; 乔维君; 谢远发; 舒满怀
Original assignee: Guangdong Midea Consumer Electric Manufacturing Co Ltd
Current assignee: Guangdong Midea Consumer Electric Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2023-08-11
Anticipated expiration: 2040-09-30
Also published as: CN114326413A

Abstract

The invention provides a detection circuit of household electrical appliance, a control method thereof and a storage medium. Wherein, the tame electric installation includes movable device, and tame electric installation's detection circuitry includes: and the signal detection circuit is configured to detect a voltage signal of the household appliance and determine the opening and closing state of the movable device according to the voltage signal. According to the embodiment of the invention, the movable device is judged to be in the closed state or the open state according to the voltage signal of the household electrical appliance detected by the signal detection circuit, so that the open-close state of the movable device can be accurately detected, further the work of the household electrical appliance is controlled according to the state of the movable device, the occurrence of control error is avoided, and the use safety of the household electrical appliance is improved.

Description

Detection circuit for household electrical appliance, control method for household electrical appliance, and storage medium

Technical Field

The present invention relates to the field of circuit technologies, and in particular, to a detection circuit of a home appliance, a detection method of a home appliance, and a readable storage medium.

Background

The household electrical appliance is provided with movable devices, such as a door body, a cover body, a fryer and the like, and the operation of the household electrical appliance can be controlled according to the state (opening or closing) of the movable devices in the related art, for example, the operation of the air fryer is automatically controlled when the fryer is closed, and the operation of the air fryer is automatically controlled when the fryer is extracted. If the state of the movable device is not accurately judged, the control of the home appliance is affected, so how to accurately detect the state of the movable device of the home appliance is a problem to be solved.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, an aspect of the present invention proposes a detection circuit for a home appliance.

Another aspect of the present invention is to provide an electric home appliance.

Still another aspect of the present invention is to provide a method for detecting a home appliance.

Yet another aspect of the present invention is to provide a readable storage medium.

In view of this, according to one aspect of the present invention, there is provided a detection circuit of an electric home appliance including a movable device, the detection circuit of the electric home appliance including: and the signal detection circuit is configured to detect a voltage signal of the household appliance and determine the opening and closing state of the movable device according to the voltage signal.

In the technical scheme, the signal detection circuit is arranged to judge the opening and closing states of the movable device of the household appliance, wherein the opening and closing states comprise a closed state and an open state. Specifically, whether the movable device is in the closed state or the open state is determined according to the voltage signal of the home appliance detected by the signal detection circuit. According to the embodiment of the invention, the open-close state of the movable device can be accurately detected, so that the work of the household electrical appliance can be controlled according to the state of the movable device, the occurrence of control errors is avoided, and the use safety of the household electrical appliance is improved.

The detection circuit of the household electrical appliance according to the present invention may further have the following technical characteristics:

in the above technical scheme, the household electrical appliances still include first switch circuit, power supply unit and heating device, and first switch circuit's first end is connected with power supply unit, and first switch circuit's second end is connected with heating device, and signal detection circuit includes: the first end of the first detection circuit is connected with the second end of the first switch circuit, and the first detection circuit is used for detecting a zero crossing signal of the first switch circuit; and the control circuit is connected with the second end of the first detection circuit and the power supply device, and determines that the movable device is in a closed state based on the fact that the first detection circuit detects the zero crossing signal.

In this embodiment, the home appliance has a general microswitch, namely a first switching circuit, which is used to control the switching on and off of the heating device. The first switching circuit is open when the movable device is in an open state and closed when the movable device is in a closed state. The first detection circuit is a zero-crossing detection circuit, one end of the first detection circuit is connected to the input end of a relay for controlling the heating device, and the other end of the first detection circuit is connected with the control circuit.

When the movable device is closed, the first switch circuit is closed, and then the connection paths of the power supply device, the first switch circuit and the heating device are conducted. At the moment, the first detection circuit can detect a zero-crossing signal, and the control circuit determines that the movable device is closed after receiving the zero-crossing signal; in contrast, when the movable device is not closed, the first switch circuit is opened, the connection paths of the power supply device, the first switch circuit and the heating device are in an opened state, and no zero crossing signal occurs. According to the embodiment of the invention, the state of the movable device can be accurately judged through the zero crossing signal of the first switch circuit.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, when the movable device is moved out, the two switching devices are opened, and after the two switching devices are opened, the whole household electrical appliance is powered off. Compared with the scheme of judging whether the movable device is moved or not by utilizing two switch devices in the related art, the technical scheme of the embodiment of the invention is that one switch circuit (namely the first switch circuit) is arranged, and whether the movable device is moved or not is judged by detecting the zero crossing signal of the switch circuit, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused.

In any of the above technical solutions, the home appliance further includes a first switch circuit, a power supply device, and a heating device, a first end of the first switch circuit is connected with the power supply device, a second end of the first switch circuit is connected with the heating device, and the signal detection circuit includes: the first end of the second detection circuit is connected with the second end of the first switch circuit, and the second detection circuit is used for detecting a voltage signal of the first switch circuit; and the control circuit is connected with the second end of the second detection circuit and the power supply device, and determines that the movable device is in a closed state based on the voltage signal detected by the second detection circuit.

In this embodiment, the home appliance has a general microswitch, namely a first switching circuit, which is used to control the switching on and off of the heating device. The first switching circuit is open when the movable device is in an open state and closed when the movable device is in a closed state. The second detection circuit is an alternating voltage detection circuit, one end of the second detection circuit is connected to the input end of the relay for controlling the heating device, and the other end of the second detection circuit is connected with the control circuit.

When the movable device is closed, the first switch circuit is closed, and then the connection paths of the power supply device, the first switch circuit and the heating device are conducted. At this time, the second detection circuit can detect a voltage signal (alternating current voltage signal), and the control circuit determines that the movable device is closed after receiving the voltage signal; in contrast, when the movable device is not closed, the first switch circuit is opened, the connection paths of the power supply device, the first switch circuit and the heating device are opened, and no voltage signal occurs. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage signal of the first switch circuit.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, when the movable device is moved out, the two switching devices are opened, and after the two switching devices are opened, the whole household electrical appliance is powered off. Compared with the scheme of judging whether the movable device is moved or not by utilizing two switch devices in the related art, the technical scheme of the embodiment of the invention is that one switch circuit (namely the first switch circuit) is arranged, and whether the movable device is moved or not is judged by detecting the voltage signal of the switch circuit, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused.

In any of the above technical solutions, the home appliance further includes a temperature detection device, a first end of the temperature detection device is connected to a power supply end or a ground end, and the signal detection circuit includes: a control circuit; the third detection circuit is respectively connected with the power supply end, the second end of the temperature detection device, the control circuit and the ground end; the second switch circuit is connected between the first end of the temperature detection device and the power supply end or between the first end of the temperature detection device and the ground end or between the second end of the temperature detection device and the third detection circuit or between the third detection circuit and the control circuit, wherein the second switch circuit is closed when the movable device is in a closed state, the second switch circuit is opened when the movable device is in an open state, the third detection circuit is used for detecting the voltage of the temperature detection device, and the control circuit determines that the movable device is in the closed state or the open state according to the voltage of the temperature detection device.

In this technical solution, in addition to a general microswitch, a low-voltage microswitch, i.e. a second switching circuit, is also provided in the household appliance. The second switch circuit is used for controlling the on and off of the temperature detection device. The second switching circuit is open when the movable device is in an open state and closed when the movable device is in a closed state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage of the temperature detection device.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, when the movable device is moved out, the two switching devices are opened, and after the two switching devices are opened, the whole household electrical appliance is powered off. Compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, the technical scheme of the embodiment of the invention is that one switch circuit (namely the second switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the voltage signal of the temperature detection device, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional detection switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused; in still another aspect, the analog-digital signal interface of the control circuit for receiving the voltage of the temperature detection device is an interface for receiving the temperature measurement data of the temperature detection device, so that the use of a chip interface can be reduced, the use of resources of a chip can be reduced, and the cost of the chip can be reduced.

In any of the above embodiments, the third detection circuit includes: the first end of the first resistor is connected with the power supply end; the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is connected with the ground end; the first end of the third resistor is connected with the second end of the first resistor and the first end of the second resistor, and the second end of the third resistor is connected with the control circuit; and the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is connected with the second end of the second resistor.

In the technical scheme, the third detection circuit comprises a first resistor, a second resistor, a third resistor and a first capacitor, and the voltage of the temperature detection device is detected through the third detection circuit, so that the opening and closing state of the movable device is judged.

In any of the above technical solutions, the home appliance further includes a first switch circuit and a power supply device, a first end of the first switch circuit is connected with the power supply device, and the signal detection circuit includes: and the control circuit is connected with the second end of the first switching circuit, wherein the first switching circuit is closed when the movable device is in a closed state, the first switching circuit is opened when the movable device is in an open state, and the control circuit determines that the movable device is in the closed state or the open state according to the voltage of the power supply device.

In this embodiment, the home appliance has a general microswitch, i.e. a first switching circuit. When the movable device is in an open state, the first switch circuit is disconnected, the connection paths of the power supply device, the first switch circuit and the control circuit are in a disconnected state, and the control circuit can acquire the voltage of the power supply device; when the movable device is in a closed state, the first switch circuit is closed, the connecting paths of the power supply device, the first switch circuit and the control circuit are conducted, and the control circuit cannot acquire the voltage of the power supply device. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage of the power supply device.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, and when the movable device is moved out, the two switching devices are opened. Compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, the technical scheme of the embodiment of the invention is that one switch circuit (namely the first switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the voltage of the power supply device, so that the open-close state of the movable device is accurately detected without adding an additional detection switch circuit, and the detection cost can be reduced.

In any of the above solutions, the signal detection circuit further includes: and the power-down memory circuit is connected with the second end of the control circuit, and the control circuit controls the household electrical appliance to work according to the voltage of the power-down memory circuit.

In the technical scheme, a storage unit is arranged in the control circuit and used for storing the operation parameters of the household electrical appliance. The control circuit compares the voltage of the power-down memory circuit with a second voltage threshold, when the voltage of the power-down memory circuit is smaller than the second voltage threshold, the power-down time of the household appliance is longer, and after the control circuit detects the voltage of the power supply device (namely, the movable device is closed), the household appliance is not controlled to work according to the operation parameters stored by the storage unit before power failure; when the voltage of the power-down memory circuit is larger than or equal to the second voltage threshold, the power-down time of the household electrical appliance is short, and after the control circuit detects the voltage of the power supply device (namely, the movable device is closed), the household electrical appliance is controlled to work according to the operation parameters stored in the storage unit before the power-down. By the embodiment of the invention, the work of the household electrical appliance can be adaptively controlled, the operation of a user is reduced, and the work intelligence of the household electrical appliance is improved.

In any of the above technical solutions, the power-down memory circuit includes: a fourth resistor; the first diode is connected with the fourth resistor in parallel to form a parallel circuit, and the first end of the parallel circuit is connected with the control circuit; and the first end of the second capacitor is connected with the ground end, and the second end of the second capacitor is connected with the second end of the parallel circuit.

In the technical scheme, the power-down memory circuit comprises a fourth resistor, a first diode and a second capacitor, and the work of the household electrical appliance can be adaptively controlled through the voltage of the power-down memory circuit, so that the user operation is reduced, and the work intelligence of the household electrical appliance is improved.

According to another aspect of the present invention, there is provided an electric home appliance, comprising: a movable device; the detection circuit of the home appliance according to any one of the above embodiments is used for detecting an open/close state of the movable device.

In this technical scheme, the home appliance includes the movable device and the detection circuit of the home appliance, so the home appliance includes all the beneficial effects of the detection circuit of the home appliance in any embodiment described above, and will not be described herein again.

In the above technical solution, the movable device at least includes one of the following: door body, lid, fry basket, overware.

According to still another aspect of the present invention, there is provided a detection method for a home appliance, for a home appliance according to any one of the above-mentioned aspects, the detection method including: and determining the opening and closing states of the movable device according to the voltage signals of the household electrical appliance.

In the technical scheme, whether the movable device is in a closed state or an open state is judged according to a voltage signal of the household electrical appliance. According to the embodiment of the invention, the open-close state of the movable device can be accurately detected, so that the work of the household electrical appliance can be controlled according to the state of the movable device, the occurrence of control errors is avoided, and the use safety of the household electrical appliance is improved.

The detection method of the household electrical appliance according to the invention can also have the following technical characteristics:

in the above technical solution, the step of determining the open-close state of the movable device according to the voltage signal of the home appliance includes: based on detecting the zero crossing signal of the first switching circuit, it is determined that the movable device is in a closed state.

In the technical scheme, the voltage signal comprises a zero crossing signal of a first switch circuit of the household appliance, the household appliance is provided with a general micro switch, namely the first switch circuit, the first switch circuit is connected with a power supply device and a heating device of the household appliance, and the first switch circuit is used for controlling the on and off of the heating device. Specifically, based on detecting a zero crossing signal of the first switching circuit, determining that the movable device is in a closed state; based on the zero crossing signal of the first switching circuit not being detected, it is determined that the movable device is in an open state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the zero crossing signal of the first switch circuit.

In addition, compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the first switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the zero-crossing signal of the switch circuit, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused.

In any of the above solutions, the step of determining the open-close state of the movable device according to the voltage signal of the home appliance includes: based on detecting the voltage signal of the first switching circuit, it is determined that the movable device is in a closed state.

In the technical scheme, the voltage signal comprises a voltage signal of a first switch circuit of the household appliance, the household appliance is provided with a general micro switch, namely the first switch circuit, the first switch circuit is connected with a power supply device and a heating device of the household appliance, and the first switch circuit is used for controlling the on and off of the heating device. Specifically, based on detecting the voltage signal of the first switching circuit, determining that the movable apparatus is in a closed state; based on the voltage signal of the first switching circuit not being detected, it is determined that the movable device is in an open state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage signal of the first switch circuit.

In addition, compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the first switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the voltage signal of the switch circuit, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused.

In any of the above technical solutions, the step of determining the open-close state of the movable device according to the voltage signal of the home appliance includes: determining that the movable device is in a closed state based on the voltage of the temperature detection device being a varying voltage; or determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being greater than or equal to a first voltage threshold, wherein the first voltage threshold is greater than 0; or determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being less than or equal to a second voltage threshold, wherein the second voltage threshold is greater than 0; or determining that the movable device is in the closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being greater than 0.

In this technical solution, the voltage signal includes a voltage of a temperature detecting device of the home appliance, and in particular, in a case where a first end of the temperature detecting device is connected to the power supply end, the second switching circuit may be connected between the first end of the temperature detecting device and the power supply end. In the case that the first end of the temperature detecting device is connected to the ground, the second switch circuit may be connected between the first end of the temperature detecting device and the ground. In the two connection modes of the second switch circuit, the voltage of the temperature detection device detected by the third detection circuit is obtained, and the movable device is determined to be closed when the voltage is a variable voltage, or the movable device is determined to be closed when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (when the first end of the temperature detection device is connected with a power supply end) or the fixed voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold (when the first end of the temperature detection device is grounded); the movable device is determined to be not closed when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold for a period of time (when the first end of the temperature detection device is connected to the power supply end) or when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (when the first end of the temperature detection device is grounded).

The second switch circuit can be connected between the second end of the temperature detection device and the third detection circuit. Acquiring the voltage of the temperature detection device detected by the third detection circuit when the second switch circuit is arranged between the second end of the temperature detection device and the third detection circuit, and determining that the movable device is closed when the voltage is a variable voltage, or determining that the movable device is closed when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (when the first end of the temperature detection device is connected with the power supply end) or when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold (when the first end of the temperature detection device is grounded); the movable device is determined to be not closed when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold for a period of time (when the first end of the temperature detection device is connected to the power supply end) or when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (when the first end of the temperature detection device is grounded).

The second switch circuit may be connected between the third detection circuit and the control circuit of the home appliance. The method comprises the steps that no matter a first end of a temperature detection device is connected with a power supply end or a ground end, when a second switch circuit is arranged between a third detection circuit and a control circuit, the voltage of the temperature detection device detected by the third detection circuit is obtained, and when the voltage is a variable voltage or a fixed voltage, the movable device is determined to be closed; and determining that the movable device is not closed when the voltage of the temperature detection device detected by the third detection circuit is not acquired, namely, the voltage of the temperature detection device is not detected by the third detection circuit.

According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage of the temperature detection device. In addition, compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the second switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the voltage signal of the temperature detection device, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional detection switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused.

In any of the above embodiments, the step of determining the open-close state of the movable device according to the voltage signal of the home appliance includes: based on detecting the voltage of the power supply device, it is determined that the movable device is in a closed state.

In the technical scheme, the voltage signal comprises the voltage of a power supply device of the household appliance, and the household appliance is provided with a general micro switch, namely a first switch circuit, wherein the first switch circuit is connected with the power supply device of the household appliance, and when the movable device is closed, the first switch circuit is closed, and the voltage of the power supply device can be detected at the moment, so that the movable device is determined to be in a closed state; the first switching circuit is opened when the movable device is opened, at which time the voltage of the power supply device cannot be detected, thereby determining that the movable device is in an open state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage of the power supply device.

In addition, compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the first switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the voltage of the power supply device, so that the open-close state of the movable device is accurately detected without adding an additional detection switch circuit, and the detection cost can be reduced.

In any of the above technical solutions, the method further includes: acquiring the voltage of a power-down memory circuit of the household appliance; and controlling the household electrical appliance to work based on the fact that the voltage of the power-down memory circuit is larger than or equal to a third voltage threshold value.

In the technical scheme, a storage unit is arranged in the household electrical appliance and used for storing operation parameters of the household electrical appliance. Comparing the voltage of the power-down memory circuit with a third voltage threshold, and when the voltage of the power-down memory circuit is smaller than the third voltage threshold, indicating that the power-down time of the household appliance is longer, and after the voltage of the power supply device (namely, the movable device is closed) is detected, controlling the household appliance to work according to the operation parameters stored by the storage unit before power failure; when the voltage of the power-down memory circuit is larger than or equal to a third voltage threshold, the power-down time of the household electrical appliance is short, and after the voltage of the power supply device (namely, the movable device is closed) is detected, the household electrical appliance is controlled to work according to the operation parameters stored in the storage unit before the power-down. By the embodiment of the invention, the work of the household electrical appliance can be adaptively controlled, the operation of a user is reduced, and the work intelligence of the household electrical appliance is improved.

According to still another aspect of the present invention, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement a method for detecting a home appliance according to any of the above aspects.

The computer readable storage medium provided by the invention realizes the steps of the detection method of the household electrical appliance according to any one of the above technical schemes when the computer program is executed by the processor, so the computer readable storage medium comprises all the beneficial effects of the detection method of the household electrical appliance according to any one of the above technical schemes.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 shows one of circuit diagrams of a detection circuit of an electric home appliance according to an embodiment of the present invention;

FIG. 2 shows one of the schematic diagrams of the input signals of the control circuit according to an embodiment of the present invention;

FIG. 3 shows one of the circuit diagrams of the first detection circuit of the embodiment of the present invention;

FIG. 4 shows a second circuit diagram of the first detection circuit according to the embodiment of the invention;

FIG. 5 shows a second circuit diagram of a detection circuit of a home device according to an embodiment of the present invention;

FIG. 6 shows a second schematic diagram of the input signal of the control circuit according to the embodiment of the invention;

FIG. 7 shows a circuit diagram of a second detection circuit of an embodiment of the present invention;

fig. 8 shows a third circuit diagram of a detection circuit of the home appliance according to the embodiment of the present invention;

fig. 9 shows a fourth circuit diagram of a detection circuit of a home appliance according to an embodiment of the present invention;

fig. 10 shows a fifth circuit diagram of a detection circuit of the home appliance according to the embodiment of the present invention;

FIG. 11 is a third schematic diagram of the input signal of the control circuit according to the embodiment of the invention;

fig. 12 shows a sixth circuit diagram of a detection circuit of the home appliance according to the embodiment of the present invention;

FIG. 13 shows a circuit diagram of a power down memory circuit in accordance with an embodiment of the present invention;

FIG. 14 shows a fourth schematic diagram of the input signal of the control circuit according to an embodiment of the present invention;

fig. 15 shows one of flow diagrams of a detection method of a home appliance according to an embodiment of the present invention;

fig. 16 shows a second flowchart of a control method of a home appliance according to an embodiment of the invention;

fig. 17 shows a third flowchart of a control method of a home appliance according to an embodiment of the present invention;

fig. 18 shows a fourth flow chart of a control method of the home appliance according to the embodiment of the present invention;

fig. 19 shows a fifth flowchart of a control method of a home appliance according to an embodiment of the present invention.

The correspondence between the reference numerals and the component names in fig. 1 to 14 is:

100 mobile devices, 102 first switch circuits, 104 power supply devices, 106 heating devices, 108 temperature detection devices, 110 relays, 112 driving circuits, 114EMC suppression circuits, 116 rectifying and filtering circuits, 118 voltage regulation circuits, 200 signal detection circuits, 202 first detection circuits, 204 control circuits, 206 second detection circuits, 208 third detection circuits, 210 second switch circuits, and 212 power-down memory circuits.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

Some embodiments of the present invention are described below with reference to fig. 1 to 19.

Example 1

In this embodiment, the home appliance comprises a movable device 100, and the detection circuit of the home appliance comprises:

the signal detection circuit 200, the signal detection circuit 200 is configured to detect a voltage signal of the home appliance, and determine the open-close state of the movable apparatus 100 according to the voltage signal.

In this embodiment, the signal detection circuit 200 is provided to determine the open/close state of the movable apparatus 100 of the home appliance, and the open/close state includes a closed state and an open state. Specifically, it is determined whether the movable apparatus 100 is in the closed state or the open state based on the voltage signal of the home electric device detected by the signal detection circuit 200. According to the embodiment of the invention, the opening and closing state of the movable device 100 can be accurately detected, so that the operation of the household electrical appliance can be controlled according to the state of the movable device 100, the occurrence of control errors is avoided, and the use safety of the household electrical appliance is improved.

It should be noted that, the home appliances may include air fryers, washing machines, electric rice cookers, microwave ovens, and the movable apparatus 100 may be a door, a cover, a frying basket, a baking tray, and the like. For example, by detecting the air fryer voltage signal, it is determined whether the basket is in the air fryer (closed state) or not (open state). Or, by detecting the voltage signal of the microwave oven, whether the door body of the microwave oven is in an open state or a closed state is judged.

Example two

As shown in fig. 1, the home appliance includes a movable device 100, a first switch circuit 102, a power supply device 104, and a heating device 106, a first end of the first switch circuit 102 is connected to the power supply device 104, a second end of the first switch circuit 102 is connected to the heating device 106, and the signal detection circuit 200 includes:

The first detection circuit 202, a first end of the first detection circuit 202 is connected with a second end of the first switch circuit 102, and the first detection circuit 202 is used for detecting a zero crossing signal of the first switch circuit 102;

the control circuit 204, the control circuit 204 is connected with the second end of the first detection circuit 202 and the power supply device 104, and the control circuit 204 determines that the movable device is in the closed state based on the first detection circuit 202 detecting the zero-crossing signal.

In this embodiment, there is a general micro switch in the home appliance, i.e. the first switch circuit 102, and the first switch circuit 102 is used to control the on and off of the heating device 106. The first switching circuit 102 is open when the movable apparatus 100 is in the open state, and the first switching circuit 102 is closed when the movable apparatus 100 is in the closed state. The first detection circuit 202 is a zero-crossing detection circuit, one end of which is connected to the input terminal of the relay 110 controlling the heating device 106, and the other end of which is connected to the control circuit 204.

When the movable apparatus 100 is closed, the first switching circuit 102 is closed, and the connection paths of the power supply apparatus 104, the first switching circuit 102, and the heating apparatus 106 are turned on. At this time, the first detection circuit 202 can detect a zero-crossing signal, and the control circuit 204 determines that the movable apparatus 100 is closed after receiving the zero-crossing signal; in contrast, when the movable apparatus 100 is not closed, the first switching circuit 102 is opened, and the connection paths of the power supply apparatus 104, the first switching circuit 102, and the heating apparatus 106 are in an opened state, zero-crossing signals do not occur.

As shown in fig. 2, specifically, the first detection circuit 202 is connected to the interrupt command interface of the control circuit 204, and when the interrupt command interface of the control circuit 204 detects a zero crossing signal, it is determined that the movable apparatus 100 is closed; when the zero crossing signal is not detected by the interrupt instruction interface of the control circuit 204, it is determined that the movable apparatus 100 is not closed.

According to the embodiment of the invention, the state of the movable device 100 can be accurately judged by the zero crossing signal of the first switch circuit 102.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, when the movable device is moved out, the two switching devices are opened, and after the two switching devices are opened, the whole household electrical appliance is powered off. Compared with the scheme of judging whether the movable device is moved or not by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the first switch circuit) is arranged, and whether the movable device 100 is moved or not is judged by detecting the zero crossing signal of the switch circuit, on one hand, the open and close state of the movable device 100 is accurately detected under the condition that no additional switch circuit is added, and the detection cost can be reduced; on the other hand, when the mobile device 100 is removed, the main control chip of the home appliance is kept uninterrupted, so that partial functions (such as a display function of the home appliance) are not available after the complete machine is powered off, and the need for restarting the home appliance when the home appliance is reused is avoided.

The zero-crossing signal may be detected by a zero-crossing square wave signal in addition to the detection level. That is, in the case of closing the movable apparatus 100, there is a square wave signal output; in the case of withdrawing the movable apparatus 100, no square wave signal is outputted.

The control circuit 204 may be a separate chip or a main control chip of the home appliance, and is not limited thereto.

As shown in fig. 3, the first detection circuit 202 specifically includes:

the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the second diode D2, the third diode D3, and the third capacitor C3 are sequentially connected in series, and the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, and the eighth resistor R8 are further connected to the first switch circuit 102, and the eighth resistor R8 is further connected to the control circuit 204. The cathode of the second diode D2 is connected with the power supply end VCC, the anode of the second diode D2 is connected with the control circuit 204, one end of the cathode of the third diode D3 and one end of the third capacitor C3 are connected with the control circuit 204, and the anode of the third diode D3 and the other end of the third capacitor C3 are grounded. With the first detection circuit 202 detecting the zero crossing signal of the first switching circuit 102, the control circuit 204 determines that the movable apparatus 100 is closed after the first detection circuit 202 detects the zero crossing signal.

As shown in fig. 4, the first detection circuit specifically includes:

the ninth resistor R9, the tenth resistor R10, the eleventh resistor R11, the twelfth resistor R12, the thirteenth resistor R13, the fourteenth resistor R14, the triode Q1, the fourth capacitor C4 and the fifth capacitor C5 are sequentially connected in series, the ninth resistor R9, the tenth resistor R10 and the eleventh resistor R11 are further connected with the first switching circuit 102, and the eleventh resistor R11 is further connected with the base electrode of the triode Q1. The collector of the triode Q1 is connected to the power supply end VCC through a thirteenth resistor R13, the collector of the triode Q1 is connected to the control circuit 204 through a fourteenth resistor R14, and the emitter of the triode Q1 is grounded. One end of the twelfth resistor R12 is connected with the eleventh resistor R11, the other end of the twelfth resistor R12 is grounded, one end of the fourth capacitor C4 is connected with the eleventh resistor R11, the other end of the fourth capacitor C4 is grounded, one end of the fifth capacitor C5 is connected with the control circuit 204, and the other end of the fifth capacitor C5 is grounded. With the first detection circuit 202 detecting the zero crossing signal of the first switching circuit 102, the control circuit 204 determines that the movable apparatus 100 is closed after the first detection circuit 202 detects the zero crossing signal.

In a specific embodiment, a micro-switch (i.e., first switching circuit 102) is provided in the air fryer to control the turning on and off of the heat pipe (i.e., heating device 106). The micro-switch is closed when the basket of the air fryer is in. The zero-crossing detection circuit (namely the first detection circuit 202) is connected to the input end of a relay for controlling the heating tube, and when the zero-crossing detection circuit detects a zero-crossing signal, the frying basket is determined to be put into the air frying pan; when the zero crossing signal is not detected by the zero crossing detection circuit, it is determined that the fry basket is not placed in the air fryer.

Example III

As shown in fig. 5, the home appliance includes a movable device 100, a first switch circuit 102, a power supply device 104, and a heating device 106, a first end of the first switch circuit 102 is connected to the power supply device 104, a second end of the first switch circuit 102 is connected to the heating device 106, and the signal detection circuit 200 includes:

the second detection circuit 206, a first end of the second detection circuit 206 is connected to the second end of the first switch circuit 102, and the second detection circuit 206 is used for detecting a voltage signal of the first switch circuit 102;

the control circuit 204, the control circuit 204 is connected to the second end of the second detection circuit 206 and the power device 104, and the control circuit 204 determines that the movable device is in the closed state based on the voltage signal detected by the second detection circuit 206.

In this embodiment, there is a general micro switch in the home appliance, i.e. the first switch circuit 102, and the first switch circuit 102 is used to control the on and off of the heating device 106. The first switching circuit 102 is open when the movable apparatus 100 is in the open state, and the first switching circuit 102 is closed when the movable apparatus 100 is in the closed state. The second detection circuit 206 is an ac voltage detection circuit, one end of which is connected to the input terminal of the relay 110 that controls the heating device 106, and the other end of which is connected to the control circuit 204.

When the movable apparatus 100 is closed, the first switching circuit 102 is closed, and the connection paths of the power supply apparatus 104, the first switching circuit 102, and the heating apparatus 106 are turned on. At this time, the second detection circuit 206 can detect a voltage signal (an ac voltage signal), and the control circuit 204 determines that the movable apparatus 100 is closed after receiving the voltage signal; in contrast, when the movable apparatus 100 is not closed, the first switch circuit 102 is opened, and the connection paths of the power supply apparatus 104, the first switch circuit 102, and the heating apparatus 106 are opened, no voltage signal occurs.

As shown in fig. 6, specifically, the second detection circuit 206 is connected to the analog-digital signal interface of the control circuit 204, and when the analog-digital signal interface of the control circuit 204 detects a voltage signal, it is determined that the movable apparatus 100 is closed; when the analog-to-digital signal interface of the control circuit 204 does not detect a voltage signal, then it is determined that the mobile device 100 is not closed.

In the embodiment of the invention, the state of the movable device 100 can be accurately determined by the voltage signal of the first switch circuit 102.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, when the movable device is moved out, the two switching devices are opened, and after the two switching devices are opened, the whole household electrical appliance is powered off. Compared with the scheme of judging whether the movable device is moved or not by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the first switch circuit) is arranged, and whether the movable device 100 is moved or not is judged by detecting the voltage signal of the switch circuit, on one hand, the open and close state of the movable device 100 is accurately detected under the condition that no additional switch circuit is added, and the detection cost can be reduced; on the other hand, when the mobile device 100 is removed, the main control chip of the home appliance is kept uninterrupted, so that partial functions (such as a display function of the home appliance) are not available after the complete machine is powered off, and the need for restarting the home appliance when the home appliance is reused is avoided.

The control circuit 204 may be a separate chip or a main control chip of the home appliance, which is not limited herein.

As shown in fig. 7, the second detection circuit 206 specifically includes:

the fifteenth resistor R15, the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18, the nineteenth resistor R19, the sixth capacitor C6 and the seventh capacitor C7 are sequentially connected in series, the fifteenth resistor R15, the sixteenth resistor R16 and the seventeenth resistor R17 are further connected with the first switch circuit 102, the seventeenth resistor R17 is further connected with the first end of the nineteenth resistor R19, and the second end of the nineteenth resistor R19 is connected with the control circuit 204. One end of the eighteenth resistor R18 is connected with the first end of the nineteenth resistor R19, the other end of the eighteenth resistor R18 is grounded, one end of the sixth capacitor C6 is connected with the first end of the nineteenth resistor R19, the other end of the sixth capacitor C6 is grounded, one end of the seventh capacitor C7 is connected with the second end of the nineteenth resistor R19, and the other end of the seventh capacitor C7 is grounded. The voltage signal of the first switch circuit 102 is detected by the second detection circuit 206, and the control circuit 204 determines that the movable apparatus 100 is closed after the second detection circuit 206 detects the voltage signal.

In a specific embodiment, a micro-switch (i.e., first switching circuit 102) is provided in the air fryer to control the turning on and off of the heat pipe (i.e., heating device 106). The micro-switch is closed when the basket of the air fryer is in. The alternating voltage detection circuit (namely the second detection circuit 206) is connected to the input end of the relay for controlling the heating tube, and when the alternating voltage detection circuit detects a voltage signal, the frying basket is determined to be put into the air frying pan; when the alternating voltage detection circuit does not detect the voltage signal, the basket is determined not to be placed in the air fryer.

Example IV

As shown in fig. 8, the home appliance includes a movable device 100 and a temperature detecting device 108, wherein a first end of the temperature detecting device 108 is connected to a power supply end VCC or a ground end GND. As shown in fig. 9, the first end of the temperature detecting device 108 is connected to the power supply terminal VCC, and as shown in fig. 10, the first end of the temperature detecting device 108 is connected to the ground terminal GND. Wherein the signal detection circuit 200 includes:

a control circuit 204;

the third detection circuit 208, the third detection circuit 208 is connected to the power supply terminal VCC, the second terminal of the temperature detection device 108, the control circuit 204, and the ground GND, respectively;

the second switch circuit 210, the second switch circuit 210 being closed when the movable apparatus 100 is in the closed state, the second switch circuit 210 being open when the movable apparatus 100 is in the open state, the third detection circuit 208 being configured to detect the voltage of the temperature detection apparatus 108, the control circuit 204 determining that the movable apparatus 100 is in the closed state or the open state based on the voltage of the temperature detection apparatus 108.

The connection position of the second switch circuit 210 may include the following three cases:

(1) In the case that the first terminal of the temperature detecting device 108 is connected to the power supply terminal VCC, the second switch circuit 210 may be connected between the first terminal of the temperature detecting device 108 and the power supply terminal VCC, i.e. the a position. In the case that the first end of the temperature detecting device 108 is connected to the ground GND, the second switch circuit 210 may be connected between the first end of the temperature detecting device 108 and the ground GND, i.e. the B position. When the second switch circuit 210 is disposed at the a position or the B position, the control circuit 204 obtains the voltage of the temperature detecting device 108 detected by the third detecting circuit 208, determines that the movable device 100 is closed when the voltage is a varying voltage, or determines that the movable device 100 is closed when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (the first end of the temperature detecting device 108 is connected to the power supply end) or when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold (the first end of the temperature detecting device 108 is grounded); the movable apparatus 100 is determined to be not closed when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold for a period of time (the first terminal of the temperature detection apparatus 108 is connected to the power supply terminal) or when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (the first terminal of the temperature detection apparatus 108 is grounded).

For example, when the movable apparatus 100 is a fry basket of an air fryer, the temperature of the fry basket will change when the fry basket is closed and the air fryer is cooking, so the voltage of the temperature detecting apparatus 108 is a changing voltage, and when the fry basket is closed and the air fryer is not cooking, the voltage of the temperature detecting apparatus 108 is a fixed voltage and greater than or equal to a first voltage threshold (the first end of the temperature detecting apparatus 108 is connected to the power supply end) or when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold (the first end of the temperature detecting apparatus 108 is grounded).

(2) The second switch circuit 210 may be connected between the second end of the temperature detecting device 108 and the third detecting circuit 208, i.e. the C position. Whether the first end of the temperature detecting device 108 is connected to the power supply end VCC or the ground end GND, when the second switch circuit 210 is set at the C position, the control circuit 204 acquires the voltage of the temperature detecting device 108 detected by the third switch circuit 208, determines that the movable device 100 is closed when the voltage is a variable voltage, or determines that the movable device 100 is closed when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (the first end of the temperature detecting device 108 is connected to the power supply end) or when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold (the first end of the temperature detecting device 108 is grounded); the movable apparatus 100 is determined to be not closed when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold for a period of time (the first terminal of the temperature detection apparatus 108 is connected to the power supply terminal) or when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (the first terminal of the temperature detection apparatus 108 is grounded).

(3) The second switch circuit 210 may be connected between the third detection circuit 208 and the control circuit 204, i.e., the D position. Whether the first end of the temperature detecting device 108 is connected to the power supply end VCC or the ground end GND, when the second switch circuit 210 is set at the D position, the control circuit 204 obtains the voltage of the temperature detecting device 108 detected by the third detecting circuit 208, and determines that the movable device 100 is closed when the voltage is a variable voltage or a fixed voltage; the movable apparatus 100 is determined to be not closed when the control circuit 204 does not acquire the voltage of the temperature detection apparatus 108 detected by the third detection circuit 208, that is, the voltage of the temperature detection apparatus 108 is not detected by the third detection circuit 208.

For example, when the movable apparatus 100 is a fry basket of an air fryer, the temperature of the fry basket will change when the fry basket is closed and the air fryer is cooking, so the voltage of the temperature sensing device 108 is a changing voltage, and when the fry basket is closed and the air fryer is not cooking, the voltage of the temperature sensing device 108 is a fixed voltage.

In this embodiment, in addition to a general microswitch, a low-voltage microswitch, i.e. a second switching circuit 210, is also provided in the household appliance. The second switch circuit 210 is used to control the on and off of the temperature detection device 108. The second switching circuit 210 is opened when the movable apparatus 100 is in the open state, and the second switching circuit 210 is closed when the movable apparatus 100 is in the closed state. The third detection circuit 208 detects the voltage of the temperature detection device 108 to determine the open/close state of the movable device 100.

As shown in fig. 11, specifically, the third detecting circuit 208 is connected to an analog-digital signal interface of the control circuit 204, and the analog-digital signal interface of the control circuit 204 is configured to receive the voltage of the temperature detecting device 108, and further determine the open-close state of the movable device 100 according to the voltage of the temperature detecting device 108.

In the embodiment of the invention, the state of the movable device 100 can be accurately judged by the voltage of the temperature detection device 108.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, when the movable device is moved out, the two switching devices are opened, and after the two switching devices are opened, the whole household electrical appliance is powered off. Compared with the scheme of judging whether the movable device is moved by using two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the second switch circuit) is arranged, and whether the movable device 100 is moved is judged by detecting the voltage signal of the temperature detection device 108, on one hand, the open-close state of the movable device 100 is accurately detected without adding an additional detection switch circuit, so that the detection cost can be reduced; on the other hand, when the mobile device 100 is removed, the main control chip of the home appliance is kept uninterrupted, so that partial functions (such as a display function of the home appliance) are prevented from being unavailable after the complete machine is powered off, and the need for restarting the power-on operation when the home appliance is reused is avoided; in another aspect, the analog-digital signal interface of the control circuit 204 that receives the voltage of the temperature detecting device 108 is an interface that receives the temperature measurement data of the temperature detecting device 108, so that the chip interface usage can be reduced, and thus the chip usage resources and the chip cost can be reduced.

Further, as shown in fig. 9 and 10, the third detection circuit 208 includes:

the first end of the first resistor R1 is connected with the power supply end;

the first end of the second resistor R2 is connected with the second end of the first resistor R1, and the second end of the second resistor R2 is connected with the ground;

the first end of the third resistor R3 is connected with the second end of the first resistor R1 and the first end of the second resistor R2, and the second end of the third resistor R3 is connected with the control circuit;

the first end of the first capacitor C1 is connected with the second end of the third resistor R3, and the second end of the first capacitor C1 is connected with the second end of the second resistor R2.

In this embodiment, the third detection circuit 208 includes a first resistor R1, a second resistor R2, a third resistor R3, and a first capacitor C1, and the voltage of the temperature detection device 108 is detected by the third detection circuit 208, so as to determine the open/close state of the movable device 100.

Example five

As shown in fig. 12, the home appliance includes a movable device 100, a first switch circuit 102, and a power supply device 104, a first end of the first switch circuit 102 is connected to the power supply device 104, and a signal detection circuit 200 includes:

The control circuit 204, the first end of the control circuit 204 is connected with the second end of the first switch circuit 102, wherein the first switch circuit 102 is closed when the movable apparatus 100 is in the closed state, the first switch circuit 102 is opened when the movable apparatus 100 is in the open state, and the control circuit 204 determines that the movable apparatus 100 is in the closed state or the open state according to the voltage of the power supply apparatus 104.

In this embodiment, there is one general micro switch, i.e. the first switching circuit 102, in the home appliance. When the movable apparatus 100 is in the open state, the first switch circuit 102 is turned off, the connection paths of the power supply apparatus 104, the first switch circuit 102 and the control circuit 204 are in the open state, and the control circuit 204 can acquire the voltage of the power supply apparatus 104; when the movable apparatus 100 is in the closed state, the first switch circuit 102 is closed, the connection paths of the power supply apparatus 104, the first switch circuit 102, and the control circuit 204 are turned on, and the control circuit 204 cannot acquire the voltage of the power supply apparatus 104.

In the embodiment of the invention, the state of the movable device 100 can be accurately judged by the voltage of the power supply device 104.

In addition, in the household electrical appliance in the related art, the switching devices are respectively connected in series on the zero line and the live line, when the movable device is placed in, the two switching devices are closed, and when the movable device is moved out, the two switching devices are opened. Compared with the scheme of judging whether the movable device is moved by using two switch devices in the related art, in the technical scheme of the embodiment of the invention, one of the switch circuits (i.e. the first switch circuit) is provided, and whether the movable device 100 is moved is judged by detecting the voltage of the power supply device 104, so that the open and close state of the movable device 100 can be accurately detected without adding an additional detection switch circuit, and the detection cost can be reduced.

In the above embodiment, the signal detection circuit 200 further includes:

the power-down memory circuit 212 is connected to the second end of the control circuit 204, and the control circuit 204 controls the home appliance to work according to the voltage of the power-down memory circuit 212.

In this embodiment, a storage unit is provided in the control circuit 204 for storing operating parameters of the home appliance. The control circuit 204 compares the voltage of the power-down memory circuit 212 with the second voltage threshold, when the voltage of the power-down memory circuit 212 is smaller than the second voltage threshold, the power-down time of the household appliance is longer, and after the control circuit 204 detects the voltage of the power supply device 104 (i.e. the mobile device 100 is closed), the household appliance is not controlled to work according to the operation parameters stored by the storage unit before power failure; when the voltage of the power-down memory circuit 212 is greater than or equal to the second voltage threshold, which indicates that the power-down time of the home appliance is shorter, after the control circuit 204 detects the voltage of the power supply device 104 (i.e. the mobile device 100 is closed), the home appliance is controlled to operate according to the operation parameters stored in the storage unit before the power-down. By the embodiment of the invention, the work of the household electrical appliance can be adaptively controlled, the operation of a user is reduced, and the work intelligence of the household electrical appliance is improved.

As shown in fig. 13, the power down memory circuit 212 includes:

a fourth resistor R4;

the first diode D1 is connected with the fourth resistor R4 in parallel to form a parallel circuit, and the first end of the parallel circuit is connected with the control circuit;

and the first end of the second capacitor C2 is connected with the ground, and the second end of the second capacitor C2 is connected with the second end of the parallel circuit.

In this embodiment, the power-down memory circuit 212 includes a fourth resistor R4, a first diode D1 and a second capacitor C2, and the voltage of the power-down memory circuit 212 can adaptively control the operation of the home appliance, reduce the operation of the user, and improve the working intelligence of the home appliance.

As shown in fig. 14, specifically, the power-down memory circuit 212 is connected to an analog-digital signal interface of the control circuit 204, and the analog-digital signal interface of the control circuit 204 is configured to receive the voltage of the power-down memory circuit 212, so as to control the operation of the home appliance according to the voltage of the power-down memory circuit 212.

Example six

As shown in fig. 1, 5, 8 and 12, the home appliance according to the embodiment of the present invention includes:

A movable device 100;

the detection circuit of the home appliance according to any of the embodiments is used for detecting the open/close state of the movable apparatus 100.

The home appliance provided by the invention comprises the movable device 100 and the detection circuit of the home appliance, so that the home appliance has all the beneficial effects of the detection circuit of the home appliance in any embodiment, and the description is omitted herein.

The home appliances may include air fryers, washing machines, electric cookers, microwave ovens, etc., and the movable apparatus 100 may be a door, a cover, a basket, a baking tray, etc. For example, by detecting the air fryer voltage signal, it is determined whether the basket is in the air fryer (closed state) or not (open state). Or, by detecting the voltage signal of the microwave oven, whether the door body of the microwave oven is in an open state or a closed state is judged.

In one embodiment, the home device further comprises:

a power supply device 104;

a heating device 106;

the first switch circuit 102, a first end of the first switch circuit 102 is connected to the power supply device 104, and a second end of the first switch circuit 102 is connected to the heating device 106.

In this embodiment, it is determined that the movable apparatus is in the closed state after detecting the zero-crossing signal of the first switching circuit 102 or the voltage signal of the first switching circuit 102; after the zero-crossing signal of the first switching circuit 102 or the voltage signal of the first switching circuit 102 is not detected, it is determined that the movable apparatus is in the open state.

In another embodiment, the home device further comprises:

a temperature detection device 108 for detecting the temperature of the movable apparatus 100.

In this embodiment, the movable device is determined to be in a closed state or an open state based on the voltage of the temperature detection device 108.

In yet another embodiment, the home device further comprises:

a power supply device 104;

the first switch circuit 102, a first end of the first switch circuit 102 is connected to the power supply device 104, and a second end of the first switch circuit 102 is connected to the control circuit 204.

In this embodiment, upon detecting the voltage signal of the power supply device 104, it is determined that the movable device is in the closed state; after the voltage signal of the power supply device 104 is not detected, it is determined that the movable device is in the on state.

In the above embodiment, the home appliance further includes:

a relay 110 for controlling the heating device 106 to be turned on or off;

A driving circuit 112 for driving the relay 110 according to the control signal;

EMC (Electro Magnetic Compatibility, electromagnetic compatibility detection) suppression circuit 114 for filtering electromagnetic interference in the circuitry of the home device to avoid affecting the operation of the home device;

the rectifying and filtering circuit 116 is configured to convert an ac voltage into a dc voltage and perform filtering, so as to supply power to a dc load of the home appliance;

the voltage regulating circuit 118 is used for reducing or increasing the voltage so as to supply power to the load.

In one embodiment, the home device further comprises:

and the display device is connected with the control circuit 204 and is used for displaying working information of the household appliance, such as prompt information that the movable device 100 is closed and the movable device 100 is opened.

Example seven

The embodiment of the invention provides a detection method of a home appliance, as shown in fig. 15, the detection method of the home appliance comprises the following steps:

in step 1502, the open/close state of the movable device is determined according to the voltage signal of the home appliance.

In the above embodiment, it is determined whether the movable apparatus is in the closed state or the open state according to the voltage signal of the home electric device. According to the embodiment of the invention, the open-close state of the movable device can be accurately detected, so that the work of the household electrical appliance can be controlled according to the state of the movable device, the occurrence of control errors is avoided, and the use safety of the household electrical appliance is improved.

It should be noted that the home appliances may include air fryers, washing machines, electric cookers, microwave ovens, and the movable devices may be door bodies, frying baskets, baking trays, and the like. For example, by detecting the air fryer voltage signal, it is determined whether the basket is in the air fryer (closed state) or not (open state). Or, by detecting the voltage signal of the microwave oven, whether the door body of the microwave oven is in an open state or a closed state is judged.

Example eight

In this embodiment, the voltage signal includes a zero crossing signal of a first switching circuit of the home appliance, and there is a general micro switch in the home appliance, i.e. the first switching circuit, which is connected to a power supply device and a heating device of the home appliance, and the first switching circuit is used to control the on and off of the heating device. Specifically, based on detecting a zero crossing signal of the first switching circuit, determining that the movable device is in a closed state; based on the zero crossing signal of the first switching circuit not being detected, it is determined that the movable device is in an open state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the zero crossing signal of the first switch circuit.

Further, the operation of the home appliance can be controlled according to the state of the movable device, as shown in fig. 16, and the control method of the home appliance includes:

step 1602, detecting a zero crossing signal of a first switching circuit;

step 1604, judging whether a zero crossing signal is detected, if yes, proceeding to step 1606, otherwise proceeding to step 1610;

step 1606, determining that the movable device is in a closed state;

step 1608, the home appliance works normally;

Step 1610, determining that the movable device is in an open state;

in step 1612, the home device stops operating.

In this embodiment, based on detecting the zero crossing signal of the first switching circuit, it is determined that the movable apparatus is in the closed state, thereby automatically controlling the operation of the home appliance; and on the basis of the fact that the zero crossing signal of the first switching circuit is not detected, the movable device is determined to be in an open state, and the household appliance is automatically controlled to stop working. The embodiment of the invention realizes the control of the work of the household electrical appliance by combining the state of the movable device, avoids the idle running of the household electrical appliance and improves the use safety of the household electrical appliance.

Example nine

In this embodiment, the voltage signal includes a voltage signal of a first switching circuit of the home appliance, and there is a general micro switch in the home appliance, that is, the first switching circuit, which is connected to a power supply device and a heating device of the home appliance, and the first switching circuit is used to control the on and off of the heating device. Specifically, based on detecting the voltage signal of the first switching circuit, determining that the movable apparatus is in a closed state; based on the voltage signal of the first switching circuit not being detected, it is determined that the movable device is in an open state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage signal of the first switch circuit.

Further, the operation of the home appliance can be controlled according to the state of the movable device, as shown in fig. 17, and the control method of the home appliance includes:

step 1702, detecting an alternating voltage;

step 1704, judging whether an alternating voltage is detected, if yes, entering step 1706, otherwise, entering step 1710;

step 1706, determining that the movable device is in a closed state;

step 1708, the home appliance works normally;

Step 1710, determining that the movable apparatus is in an open state;

in step 1712, the home device stops operating.

In this embodiment, based on detecting the voltage signal of the first switch circuit, it is determined that the movable device is in a closed state, so as to automatically control the home appliance to operate; and on the basis of the fact that the voltage signal of the first switch circuit is not detected, the movable device is determined to be in an open state, and the household appliance is automatically controlled to stop working. The embodiment of the invention realizes the control of the work of the household electrical appliance by combining the state of the movable device, avoids the idle running of the household electrical appliance and improves the use safety of the household electrical appliance.

Examples ten

In this embodiment, the voltage signal comprises a voltage of a temperature detection device of the home appliance, in particular, based on the voltage of the temperature detection device being a varying voltage, it is determined that the movable device is in a closed state; or determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being greater than or equal to a first voltage threshold, wherein the first voltage threshold is greater than 0; or determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being less than or equal to a second voltage threshold, wherein the second voltage threshold is greater than 0; or determining that the movable device is in the closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being greater than 0.

Specifically, as in the fourth embodiment, the first end of the temperature detecting device is connected to the power supply end or the ground end.

In the case that the first end of the temperature detecting device is connected to the power supply end, the second switch circuit may be connected between the first end of the temperature detecting device and the power supply end. In the case that the first end of the temperature detecting device is connected to the ground, the second switch circuit may be connected between the first end of the temperature detecting device and the ground. In the two connection modes of the second switch circuit, the voltage of the temperature detection device detected by the third detection circuit is obtained, and the movable device is determined to be closed when the voltage is a variable voltage, or the movable device is determined to be closed when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (when the first end of the temperature detection device is connected with a power supply end) or the fixed voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold (when the first end of the temperature detection device is grounded); the movable device is determined to be not closed when the voltage is a fixed voltage and the fixed voltage is less than or equal to a second voltage threshold for a period of time (when the first end of the temperature detection device is connected to the power supply end) or when the voltage is a fixed voltage and the fixed voltage is greater than or equal to a first voltage threshold (when the first end of the temperature detection device is grounded). For example, when the movable device is a basket of an air fryer, the temperature of the basket will change when the basket is closed and the air fryer is cooking, so the voltage of the temperature detecting device will be a changing voltage, and when the basket is closed and the air fryer is not cooking, the voltage of the temperature detecting device will be a fixed voltage and greater than or equal to a preset voltage.

For example, when the movable device is a fry basket of an air fryer, the temperature of the fry basket will change when the fry basket is closed and the air fryer is cooking, so the voltage of the temperature sensing device is a changing voltage, and when the fry basket is closed and the air fryer is not cooking, the voltage of the temperature sensing device is a fixed voltage.

According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage of the temperature detection device.

In addition, compared with the scheme of judging whether the movable device is moved away by utilizing two switch devices in the related art, in the technical scheme of the embodiment of the invention, one switch circuit (namely the second switch circuit) is arranged, and whether the movable device is moved away is judged by detecting the voltage signal of the temperature detection device, on one hand, the open-close state of the movable device is accurately detected under the condition that no additional detection switch circuit is added, and the detection cost can be reduced; on the other hand, when the movable device is removed, the main control chip of the household appliance is kept uninterrupted, so that partial functions (such as the display function of the household appliance) are prevented from being unavailable after the whole appliance is powered off, and the startup operation is prevented from being needed again when the household appliance is reused.

Further, the operation of the home appliance can be controlled according to the state of the movable device, as shown in fig. 18, the control method of the home appliance includes:

step 1802, detecting a voltage of a temperature detecting device;

step 1804, judging whether the temperature detection device is open according to the voltage of the temperature detection device, if not, proceeding to step 1806, if yes, proceeding to step 1810;

step 1806, determining that the movable apparatus is in a closed state;

step 1808, the home appliance works normally;

step 1810, determining that the movable apparatus is in an open state;

in step 1812, the home device stops operating.

The embodiment of the invention realizes the control of the work of the household electrical appliance by combining the state of the movable device, avoids the idle running of the household electrical appliance and improves the use safety of the household electrical appliance.

Example eleven

In this embodiment, the voltage signal includes the voltage of the power supply device of the home appliance, and there is a general micro switch, i.e. a first switch circuit, in the home appliance, and the first switch circuit is connected to the power supply device of the home appliance, and when the movable device is closed, the first switch circuit is closed, and at this time, the voltage of the power supply device can be detected, so as to determine that the movable device is in a closed state; the first switching circuit is opened when the movable device is opened, at which time the voltage of the power supply device cannot be detected, thereby determining that the movable device is in an open state. According to the embodiment of the invention, the state of the movable device can be accurately judged through the voltage of the power supply device.

Further, the operation of the home appliance can be controlled according to the state of the movable device, as shown in fig. 19, and the control method of the home appliance includes:

step 1902, detecting a voltage of a power supply device;

step 1904, judging whether the voltage of the power supply device is detected, if yes, proceeding to step 1906, otherwise proceeding to step 1910;

step 1906, determining that the movable device is in a closed state;

step 1908, the home appliance works normally;

step 1910, determining that the movable device is in an open state;

in step 1912, the home device stops operating.

In the above embodiment, the control method of the home appliance further includes: acquiring the voltage of a power-down memory circuit of the household appliance; and controlling the household electrical appliance to work based on the fact that the voltage of the power-down memory circuit is larger than or equal to a third voltage threshold value.

In this embodiment, a storage unit is provided in the home appliance for storing the operation parameters of the home appliance. Comparing the voltage of the power-down memory circuit with a third voltage threshold, and when the voltage of the power-down memory circuit is smaller than the third voltage threshold, indicating that the power-down time of the household appliance is longer, and after the voltage of the power supply device (namely, the movable device is closed) is detected, controlling the household appliance to work according to the operation parameters stored by the storage unit before power failure; when the voltage of the power-down memory circuit is larger than or equal to a third voltage threshold, the power-down time of the household electrical appliance is short, and after the voltage of the power supply device (namely, the movable device is closed) is detected, the household electrical appliance is controlled to work according to the operation parameters stored in the storage unit before the power-down. By the embodiment of the invention, the work of the household electrical appliance can be adaptively controlled, the operation of a user is reduced, and the work intelligence of the household electrical appliance is improved.

Example twelve

According to an embodiment of the present invention, a readable storage medium is provided, on which a program or an instruction is stored, which when executed by a processor, implements a method for detecting an electric home appliance according to any of the above-mentioned aspects. Among them, the computer-readable storage medium includes a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, an optical disk, or the like.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection circuit for an electrical home appliance, the electrical home appliance comprising a movable device, the detection circuit comprising:

A signal detection circuit configured to detect a voltage signal of the home appliance and determine an open-close state of the movable device according to the voltage signal;

the household electrical appliances still include temperature-detecting device, power supply end or ground terminal are connected to temperature-detecting device's first end, signal detection circuit includes:

a control circuit;

the third detection circuit is respectively connected with the power supply end, the second end of the temperature detection device, the control circuit and the ground end;

a second switch circuit connected between the first end of the temperature detection device and the power supply end or between the first end of the temperature detection device and the ground end or between the second end of the temperature detection device and the third detection circuit or between the third detection circuit and the control circuit,

the second switch circuit is closed when the movable device is in a closed state, the second switch circuit is opened when the movable device is in an open state, the third detection circuit is used for detecting the voltage of the temperature detection device, and the control circuit determines that the movable device is in the closed state or the open state according to the voltage of the temperature detection device.

2. The detection circuit of the home appliance according to claim 1, wherein the third detection circuit comprises:

the first end of the first resistor is connected with the power supply end;

the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is connected with the ground end;

the first end of the third resistor is connected with the second end of the first resistor and the first end of the second resistor, and the second end of the third resistor is connected with the control circuit;

and the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is connected with the second end of the second resistor.

3. The detection circuit of a home appliance of claim 1, wherein the signal detection circuit further comprises:

and the power-down memory circuit is connected with the second end of the control circuit, and the control circuit controls the household appliance to work based on the voltage of the power-down memory circuit.

4. The detection circuit of a home appliance according to claim 3, wherein the power-down memory circuit comprises:

A fourth resistor;

the first diode is connected with the fourth resistor in parallel to form a parallel circuit, and the first end of the parallel circuit is connected with the control circuit;

and the first end of the second capacitor is connected with the ground end, and the second end of the second capacitor is connected with the second end of the parallel circuit.

5. An electrical home appliance, comprising:

a movable device;

the detection circuit of any one of claims 1 to 4, wherein the detection circuit is configured to detect an open/close state of the movable device.

6. The home appliance of claim 5, wherein the plurality of home appliances,

the movable device comprises at least one of the following: door body, lid, fry basket, overware.

7. A method for detecting an electrical home appliance according to claim 5 or 6, comprising:

determining the opening and closing state of the movable device according to the voltage signal of the household electrical appliance;

the step of determining the opening and closing state of the movable device according to the voltage signal of the home appliance specifically includes:

Determining that the movable device is in a closed state based on the voltage of the temperature detection device being a varying voltage; or alternatively

Determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being greater than or equal to a first voltage threshold, wherein the first voltage threshold is greater than 0; or alternatively

Determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being less than or equal to a second voltage threshold, wherein the second voltage threshold is greater than 0; or alternatively

And determining that the movable device is in a closed state based on the voltage of the temperature detection device being a fixed voltage and the voltage of the temperature detection device being greater than 0.

8. The method for detecting a home appliance according to claim 7, further comprising:

acquiring the voltage of a power-down memory circuit of the household appliance;

and controlling the household electrical appliance to work based on the fact that the voltage of the power-down memory circuit is larger than or equal to a third voltage threshold.

9. A readable storage medium having stored thereon a program or instructions which, when executed by a processor, implement the method of detecting a home appliance according to claim 7 or 8.