WO2021098870A1

WO2021098870A1 - Household appliance

Info

Publication number: WO2021098870A1
Application number: PCT/CN2020/130713
Authority: WO
Inventors: 邝继伍
Original assignee: 邝继伍
Priority date: 2019-11-24
Filing date: 2020-11-22
Publication date: 2021-05-27
Also published as: CN112833616A

Abstract

A household appliance, comprising a housing, a main control board (2), and a live control circuit (1). A live wire port (31), a zero wire port (32), the main control board (2), and the live control circuit (1) are provided in the housing; the live control circuit (1) is provided with a test terminal (11) and a sensing terminal (133); the test terminal (11) of the live control circuit (1) is electrically connected to a metal part (5) of the housing or a conductive part which can be touched by a human body; the main control board (2) is electrically connected to a power supply port (3), and a circuit breaker control circuit (21) is provided on the main control board (2); the circuit breaker control circuit (21) controls on and off of an electric control switch (22); the live control circuit (1) is electrically connected to the main control board (2). By means of the household appliance, the technical effects of live warning of a metal housing of a household appliance without a ground wire and automatic power off are achieved; potential safety hazards caused by disconnection of a ground wire bus of a household power grid of a household appliance with a ground wire are also avoided, so that a user obtains better safety guarantee.

Description

A household appliance

Technical field

The invention relates to the technical field of household appliances, in particular to a household appliance with warning and protection functions and a control method thereof.

Background technique

At present, some household appliances do not have a grounding wire, and their shells are made of metal materials. When the live wire or neutral wire touches the metal shell, the shell is charged, which may cause safety hazards to users. As well as some old buildings in cities and some buildings in rural areas, the home power grid is not equipped with a ground wire, and the ground wire of the building is installed due to the aging of the ground wire, causing the home power grid grounding bus to be disconnected. When the live wire or neutral wire of the household appliance touches it Connect the metal shell of the ground wire port, the household appliance will not disconnect the input power at this time, which may cause safety hazards during the use of the household appliance. At the same time, its leakage will also be connected to the ground wire of the home power grid, causing safety hazards in other home appliances that have ground wires in the home power grid.

Technical solutions

The first technical problem to be solved by the present invention is: how to make household appliances without ground wire, when the live wire or neutral wire touches its metal shell, the input power can be disconnected to ensure the safe use of household appliances . In order to solve the above technical problems, in the household appliance of the present invention, the test terminal of the charged control circuit is electrically connected to its metal shell, or a conductive component that can be touched by the human body; the sensing terminal of the charged control circuit is connected to the neutral wire and the live wire through the sensing component Close to the combination and insulated from each other; or the sensing end is electrically connected to the neutral wire and the live wire through the element, and the live control circuit is electrically connected to the main control, and the main control board controls the electric control switch to disconnect the live wire disconnect switch and the neutral wire disconnect switch. Therefore, whether the live wire or the neutral wire touches the metal shell of the household appliance, the household appliance will disconnect its input power.

The second technical problem to be solved by the present invention is: how to make the household electrical appliance disconnect when its metal shell touches the live wire or the neutral line of other power ports when the ground wire bus of the home power grid is disconnected Input power to prevent the metal housing of household appliances from being charged, causing the ground wire port to be charged, causing the metal housing of other electrical equipment connected to the home grid to be connected to the ground wire also being charged, which will affect the safety of other electrical equipment. In order to solve the above technical problems, in the household appliance of the present invention, the test terminal of the charged control circuit is electrically connected to the ground terminal; the sensing terminal of the charged control circuit is combined with the neutral wire and the live wire through the sensing component, or the sensing terminal The components are electrically connected with the neutral wire and the live wire. And the electric control switch of the household appliance is provided with a ground disconnect switch, so that when the metal shell of the household appliance of the present invention touches the live wire or the neutral line, the ground disconnect switch can be disconnected, thereby avoiding the metal shell of the household appliance. The body is electrified, causing the ground wire port of other power ports in the home power grid to become electrified, thereby reducing the potential safety hazards of personnel using electrical equipment.

The third technical problem to be solved by the present invention is how to make the household appliance detect whether the warning function of the household appliance is normal when the metal shell of the household appliance is energized under normal working conditions without affecting the use and safety of the household appliance. For example: Refrigerators usually use compressors for refrigeration, and their metal shell is connected to the ground port. Since the compressor cannot be turned on and off frequently, it will be easily damaged. Without disconnecting the input power of the refrigerator, when testing that the refrigerator shell is live, check whether the warning effect of the leakage protection switch is normal, and at the same time, the user cannot be injured by the leakage. In order to solve the above technical problems, the test terminal of the charged control circuit of the household appliance of the present invention is electrically connected to the ground terminal via the component, and the sensing terminal of the charged control circuit is combined with the neutral wire and the live wire through the sensing component, or the sensing terminal is close to the neutral wire and the live wire. The measuring terminal is electrically connected with the neutral wire and the live wire through the component. For example: the test end of the live control circuit is equipped with test switch A, resistance A, and resistance D, and the sensing end is equipped with resistance D and resistance E; connect to the test switch A, at this time, the neutral port and the live wire port pass through the resistance D and the resistance respectively. E. Then connect the test switch A to the test terminal, isolate the live wire port and the neutral wire port to the metal shell of the household appliance through high impedance resistance. At this time, the leakage current is very small, and it can be used in 220V city power. Set at 0.01mA and below, it reminds the user that the housing of the household appliance is live, and its warning function is normal; it will neither cause harm to the user, nor cause the operation of the external leakage protection switch connected in series, disconnect the power supply, and affect the home appliance. Normal use.

The fourth technical problem to be solved by the present invention is: how to make the household electrical appliance have a ground wire in the home power grid, or there is no ground wire, when the live wire or the neutral wire touches the metal shell of the household electrical appliance, they must be disconnected. Open its circuit breaker parts to better ensure the safety of household appliances. In order to solve the above technical problems, the household appliance of the present invention is equipped with a ground wire detection circuit and a control switch. When it is detected that the ground wire is connected normally, the neutral wire and the live wire can be applied when the current is unbalanced. Circuit breaker component; when the ground wire is disconnected, the charged control circuit of the present invention can be used to realize that when the metal shell of the household appliance touches the neutral wire or the live wire, the input power of the household appliance is disconnected to better ensure the household The safety of electrical appliances.

The fifth technical problem to be solved by the present invention is: how to disconnect the input power when the metal shell of the household appliance touches the live line or the neutral line, so as to ensure the safety of the household appliance and at the same time ensure that the household appliance is in use In the safety regulation test, its high voltage will not cause adverse effects on the live control device and cause damage to the household appliances. For example: some household appliances have to withstand the test of withstand voltage above 1000V between the shell and the live wire and the neutral wire. In order to solve the above technical problems, the test terminal of the charging control circuit of the household appliance of the present invention is electrically connected to the ground terminal via a high-impedance resistor or a capacitor, which not only fulfills the requirements of safety regulation test, but also realizes that the housing of the household appliance is charged. The technical effect of power-off control.

Summary of the invention

The household appliance provided by the present invention can prompt the user in time when the housing or the ground wire of the household appliance is electrified, or disconnect the input power source, thereby achieving the effect of safety protection.

The household appliance provided by the present invention includes a housing, a main control board, and a charging control circuit. The shell is provided with a live wire port, a neutral port, a main control board, and a live control circuit; the live control circuit is provided with a test terminal and a sensing terminal; the test terminal of the live control circuit and the metal parts of the shell or The conductive parts that can be touched by the human body are electrically connected; the main control board is electrically connected to the power port, and the main control board is provided with a circuit breaker control circuit; the power off control circuit controls the on and off of the electric control switch; the electrification control circuit is connected with The main control board is electrically connected. The main control board and the charging control circuit can be integrated together, or can be set separately.

A ground wire port is provided on the power port, and the ground wire port is electrically connected with the metal part of the casing, or the ground wire port is electrically connected with a conductive part that can be touched by the human body.

An electric control switch is provided, one end of the electric control switch is electrically connected with the power port, and the other end of the electric control switch is electrically connected with the electrical component. The electric control switch is provided with a live wire disconnect switch and a neutral wire disconnect switch; or the electric control switch is provided with a live wire disconnect switch, a neutral wire disconnect switch, and a ground wire disconnect switch.

The neutral wire and the sensing component are provided close to the combination and insulated from each other; or the neutral wire, the live wire and the sensing component are provided close to the combination and are insulated from each other.

There is a warning component, and the warning component is set as a light warning; or set as an audio warning; or set as a combination of light and audio warning.

The sensing end of the live control circuit is electrically connected with the live wire port and the neutral port through the component; the test end of the live control circuit is electrically connected with the ground wire port through the component.

The sensing end of the live control circuit is electrically connected to the live wire port via a resistor D, or the sensing end of the live control circuit is electrically connected to the live wire port via a capacitor A; the sensing end of the live control circuit is electrically connected to the neutral port via a resistor E, Or the sensing end of the charged control circuit is electrically connected to the neutral port via the capacitor B.

The test end of the live control circuit is provided with a resistor F to be electrically connected to the ground wire port, or the test end of the live control circuit is provided with a capacitor D to be electrically connected to the ground wire port.

A capacitor C is provided and connected to the sensing end and the test end of the live control circuit; the open circuit control circuit is provided with a current transformer.

A control switch is provided, which is connected in series between the test terminal and the ground wire port; a ground wire detection circuit is provided, and the ground wire detection circuit detects the connection and disconnection of the ground wire; and a switch control circuit is provided. The switch control circuit is electrically connected to the ground detection circuit.

When the ground wire detection circuit outputs a control signal, the switch control circuit controls the control switch to be connected; when the ground wire detection circuit does not output a control signal, the switch control circuit controls the control switch to turn off; or when the ground wire detection circuit outputs a control signal, The switch control circuit controls the control switch to turn off; when the ground wire detection circuit does not output a control signal, the switch control circuit controls the control switch to connect.

A test switch A is provided, one end of the test switch A is electrically connected to the test end of the charged control circuit, and the other end of the test switch A is electrically connected to the live wire disconnect switch.

A test switch A is provided, one end of the test switch A is electrically connected to the test terminal of the charged control circuit, and the other end of the test switch A is electrically connected to the input terminal of the live wire disconnect switch.

A test switch B is provided, one end of the test switch B is electrically connected to the test end of the live control circuit, and the other end of the test switch B is electrically connected to the output end of the live wire disconnect switch.

A test switch C is provided, one end of the test switch C is electrically connected to the test end of the charged control circuit, and the other end of the test switch C is electrically connected to the neutral port.

A resistor A is provided, one end of the resistor A is electrically connected to the live wire port, the other end of the resistor A is electrically connected to the test terminal of the charged control circuit, or the other end of the resistor A is electrically connected to the test terminal of the charged control circuit through the test switch A Connection; provided with a resistor B, one end of the resistor B is electrically connected to the neutral port, the other end of the resistor B is electrically connected to the test end of the live control circuit, or the other end of the resistor B is connected to the live control circuit through the test switch C The test terminal is electrically connected; a resistor C is provided, one end of the resistor C is electrically connected to the output terminal of the live wire disconnect switch, the other end of the resistor C is electrically connected to the test terminal of the live control circuit, or the other end of the resistor C is through the test switch B It is electrically connected to the test terminal of the live control circuit.

When the grounding component of the household appliance of the present invention is in contact with the live wire or the neutral line, the input power can be cut off, avoiding that when the grounding component of the electrical appliance is charged, when there is no ground wire, the current passes through the human body and other conductors to generate leakage current before it is disconnected. Open the disconnect switch.

It can be seen from the above technical solutions that a household appliance of the present invention includes a housing, a main control board, and a live control circuit; the housing is provided with a live wire port, a neutral port, a main control board, and a live control circuit. The test terminal of the charging control circuit is electrically connected with the metal part of the shell or the conductive part that can be touched by the human body; the charging control circuit is provided with sensing parts and warning parts. The main control board is electrically connected to the power port, the main control board is provided with a circuit breaker control circuit; an electric control switch is provided, one end of the electric control switch is electrically connected to the power port, and the other end of the electric control switch is electrically connected to the electrical component connection. The power-off control circuit controls the on and off of the electric control switch; and the charging control circuit is electrically connected with the main control board. It has realized the technical effect of live warning and automatic power-off of the metal shell of non-grounded household appliances; it has also realized the potential safety hazards caused by the disconnection of the grounding bus of the home power grid for household appliances with grounding, so that users can get better Security guarantee.

Description of the drawings

Fig. 1 is a working principle diagram of embodiment 1 and embodiment 2 of the present invention.

Fig. 2 is a working principle diagram of embodiment 3 of the present invention.

Fig. 3 is a working principle diagram of embodiment 4 of the present invention.

Fig. 4 is a working principle diagram of embodiment 5 of the present invention.

Fig. 5 is a working principle diagram of embodiment 6 of the present invention.

Fig. 6 is the working principle diagram 1 of the charging control circuit of the present invention.

Fig. 7 is the working principle diagram 2 of the charging control circuit of the present invention.

Fig. 8 is a working principle diagram 3 of the charging control circuit of the present invention.

Fig. 9 is a working principle diagram 4 of the charging control circuit of the present invention.

Fig. 10 is the working principle diagram 5 of the charging control circuit of the present invention.

Figure 11 is a schematic diagram of the combined structure of the sensing component and the neutral line of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be further described below in conjunction with the drawings in the present invention:

Embodiment 1 and Embodiment 2 of a household appliance of the present invention, as shown in Figure 1, Figure 6, Figure 7, and Figure 11, include a housing, a main control board 2, and a live control circuit 1; the housing is provided with a live wire Port 31, neutral port 32 main control board 2, charging control circuit 1; the test terminal of the charging control circuit 1 is electrically connected to the shell metal part 5 or a conductive part that can be touched by the human body; the charging control circuit 1 is provided with There are a sensing component 13 and a warning component 12.

The main control board 2 is electrically connected to the power port 3. The main control board 2 is provided with a circuit breaker control circuit 21; an electric control switch 22 is provided. One end of the electric control switch 22 is electrically connected to the power port 3, and the other of the electric control switch 22 One end is electrically connected to the electrical component 4; the circuit control circuit 21 controls the on and off of the electric control switch 22; the electrification control circuit 1 is electrically connected to the main control board 2. The electronically controlled switch 22 may be set as an electronic switch, or may be set as a mechanical switch. The embodiment of the present invention is set as an electronic switch, which is controlled by a thyristor.

When the household appliance has a ground wire, a ground wire port 33 is provided on the power port 3, and the ground wire port 33 is electrically connected to the metal part 5 of the housing, or the ground wire port 33 is electrically connected to a conductive part that is accessible to the human body.

The electric control switch 22 is provided with a live wire disconnect switch 312 and a neutral disconnect switch 322; or the electric control switch 22 is provided with a live disconnect switch 312, a neutral disconnect switch 322, and a ground disconnect switch 332. The electric control switch 22 is provided with a ground wire disconnect switch 332, which can prevent the household power grid from being connected to the household appliances due to the ground wire being charged, which may cause safety hazards to users.

The warning component 12 is set as a light warning; or as an audio warning; or as a combination of light and audio warning.

In order to make the warning effect of the warning component 12 and the control effect of the charging control circuit 1 better, a neutral line 321 and the sensing component 13 are arranged close to the combination and insulated from each other.

In the first and second embodiments of the present invention, the sensing component 13 uses a metal iron pipe with a length of 50-60 mm and a diameter of 8-10 mm; the neutral line 321 uses a length of 1-1.2 meters and a wire diameter of 0.25 -0.5 square millimeters of surface-insulated wire.

The sensing component 13 is configured as a conductive body, which can be configured in different shapes and sizes according to actual applications; the neutral line 321 and the sensing component 13 form a circuit loop through the test terminal of the charged control circuit 1 and the ground line. When the local line is live, the warning component 12 on the charging control circuit 1 issues a warning. The charging control component 1 can also provide a control voltage or signal to the main control board 2 to make the circuit breaker control circuit 21 work and turn off the electric control switch twenty two. The main control board 2 circuit is powered by the live wire 311 and the neutral wire 321, and the charged control circuit 1 is powered by the ground wire or the induced live wire 311 voltage. The circuit of the present invention is simple and practical, and its safety prompt and stability are better.

A neutral wire 321, a live wire 311, and the sensing component 13 are arranged close to each other and insulated from each other. The voltage detected by the test terminal on the charging control circuit 1 forms a loop with the neutral wire 321 and the live wire 311 through the sensing component 13 on the charging control circuit 1. The home appliance is provided with a neutral wire 321, a live wire 311, and a sensing component 13 that are closely combined and insulated from each other, which can make the present invention work more stably in the home power grid line without a ground wire, and the live wire 311 and the neutral wire 321 of the power port 3 are connected in phase. On the contrary, or use an isolation transformer for power supply, which is less affected by the environment. When the phase of the live wire 311 and the neutral wire 321 are reversed, the induced voltage on the live wire 311 passes through the sensing component 13 to the test terminal on the charged control circuit 1 to form a loop with the ground wire port 33.

In order to be able to determine whether the charging control circuit 1 is working normally, a test switch A112 and a resistance A111 are provided; one end of the test switch A112 and the resistance A111 is electrically connected to the test terminal of the charging control circuit 1, and the other end of the test switch A112 is connected to the electric control The live wire input end of the switch 22 is electrically connected, and the other end of the resistor A111 is electrically connected to the ground wire port 33. The resistor A111 can block the short circuit between the test terminal of the charged control circuit 1 and the live wire 311, so that when the test switch A112 is connected, it can detect whether the charged control circuit 1 is working normally, and will not affect or harm the power grid. The resistance value of the resistor A111 is set according to actual applications. In the embodiment of the present invention, the resistance value of the resistor A111 is 1-1.5 MΩ.

The sensing component 13 is wound on the neutral wire 321, or the neutral wire 321 is wound on the sensing component 13, or the sensing components 13 are arranged side by side close to the neutral wire 321; the sensing component 13 is wound on the neutral wire 321, the live wire On 311, either the neutral wire 321 and the live wire 311 are wound on the sensing component 13; or the sensing component 13 is arranged close to the neutral wire 321 and the live wire 311 side by side; or other combinations are adopted. The size and shape of the neutral wire 321 and the live wire 311 used in combination with the sensing component 13 are set according to actual applications. The present invention can also realize the improvement of the warning effect of the ground wire charging control device 1 when the isolation transformer is used for power supply and the working power grid is not installed with a ground wire.

A test switch B113 is provided, one end of the test switch B113 is electrically connected to the test end of the charged control circuit 1, and the other end of the test switch B113 is electrically connected to the live wire output end of the electric control switch 22. When the present invention is used to connect electrical components, the test switch B113 is connected to detect whether the main control board 2 and the charged control circuit 1 work normally.

The working principle of embodiment 1 and embodiment 2 of the present invention: the ground port 33 of the household appliance is electrically connected to the point C of the rectifying component 101, the point D of the rectifying component 101 is electrically connected to the sensing component 13; the point A of the rectifying component 101 is electrically connected to One end of the thyristor 104 is electrically connected, the other end of the thyristor 104 is electrically connected to the positive electrode of the LED lamp 105, and the negative electrode of the LED lamp 105 is electrically connected to the B end of the rectifying component 101; A capacitor 102 is provided at the end; the A end of the rectifying component 101 is also provided with a bidirectional diode 103 that is electrically connected to the control electrode of the thyristor 104; the point C is the test end, and the point D is the sensing end 133.

The bidirectional diode 103 can be set to one or more than one in series, and the present invention is set to three in series. The capacitor 102 can also be set as a ceramic piezoelectric sheet, in which case the ceramic piezoelectric sheet can be used as a charging component or a sounding component. The capacity of the capacitor can be set according to actual applications. The charging component in the embodiment of the present invention is set as the capacitor 102, and the capacity is set to 2-10 nF.

Embodiment 3 and Embodiment 4 of the present invention: the charging control circuit 1 is identified as the charging control device 1, the main control board 2 is identified as the power-off control circuit 2, and the power-off control circuit 21 is identified as the disconnection control component 21. As shown in Figure 3, Figure 4, Figure 8, Figure 9, Figure 10, the household appliance is provided with a live wire port 31, a neutral wire port 32, a ground wire port 33, a circuit breaker control circuit 2, and a live control device 1; The disconnection control circuit 2 is provided with a disconnection control component 21, a live disconnection switch 312, and a neutral disconnection switch 322; the ground port 33 is electrically connected to the test terminal of the charging control device 1; the charging control device 1 is connected to the disconnection control The circuit 2 is electrically connected or connected with an electrical signal; the D terminal of the charging control device 1 is connected to the live wire port 31 and the neutral wire port 32 through components, respectively; the C terminal of the charging control device 1 is provided with an electric component and a ground wire port 33 phase connection. In electrical equipment without a ground wire, the ground port 33 is represented as a conductive part that is accessible to the human body in the electrical equipment, for example, the metal shell of household appliances and electrical equipment. The disconnect switch can be set as a mechanical switch or an electronic switch according to actual applications.

The D end of the charged control device 1 is electrically connected to the live wire port 31 via a resistor D314, or the D end of the charged control device 1 is electrically connected to the live wire port 31 via a capacitor A313; the D end of the charged control device 1 is electrically connected to the neutral port 32 via a resistor E324 It is electrically connected, or the D terminal of the charging control device 1 is electrically connected to the neutral port 32 via the capacitor B323.

A resistor F334 is provided at the end C of the charging control device 1 to be electrically connected to the ground port 33, or a capacitor D333 is provided at the end C of the charging control device 1 to be electrically connected to the ground port 33.

A capacitor C115 is provided and connected to the D and C terminals of the charging control device 1. The capacitor C can reduce the intrusion of external interference signals into the circuit of the charging control device, and can avoid or reduce the malfunction of the charging control device due to external interference signals. .

The charging control device 1 is provided with a warning component 12; the disconnection control circuit 2 is provided with a current transformer 23.

The charged control device 1 is set as a micro current control, and its micro current is set as a safe current, which will not cause harm to the human body, and can be set according to actual application requirements and safety regulations. In the absence of a ground wire, when using household appliances, you can conduct safety tests on the conductive parts of the housing of the household appliances or electrical equipment, and test whether the conductive parts of the housing are in contact with the live wire 311 and the neutral wire 321. It will not cause a disconnect switch. Disconnect, it will not affect the normal use of household appliances, making the use of household appliances safer and more convenient. At the same time, it also realizes the micro-current leakage warning effect of the household appliance of the present invention when there is a ground wire, and avoids the potential safety hazard of the electric appliance's micro-current leakage.

In order to use the present invention more safely and practically, a ground wire disconnect switch 332 is provided. The ground wire disconnect switch 332 is set in linkage with the live wire disconnect switch 312 and the neutral wire disconnect switch 322, or the ground wire disconnect switch 332 and the live wire disconnect switch 312 , The neutral line disconnect switch 322 is controlled separately.

In order to be able to determine whether the charging control device 1 is working normally, a test switch A112 and a resistance F334 are provided; one end of the test switch A112 and the resistance F334 is electrically connected to the test terminal of the charging control device 1, and the other end of the test switch A112 is connected to the live port 31 is electrically connected, or the other end of the test switch A112 is electrically connected to the live port 31 through the resistor A111; the other end of the resistor F334 is electrically connected to the ground port 33.

A test switch B113 is provided. One end of the test switch B113 is electrically connected to the test terminal of the live control device 1, and the other end of the test switch B113 is electrically connected to the output terminal of the live wire disconnect switch 312; or the other end of the test switch B113 is connected to the output terminal of the live wire disconnect switch 312 through a resistor C131. The output terminal of the live wire disconnect switch 312 is electrically connected.

A test switch C122 is provided, one end of the test switch C122 is electrically connected to the test terminal of the charged control device 1, the other end of the test switch C122 is electrically connected to the neutral port 32, or the other end of the test switch C122 is connected to the neutral port via a resistor B121 32 electrical connections. The two ends of the test switch A112 and the test switch C122 can be connected in parallel.

The test switch G51 is also provided, and the test switch G51 and the resistor G52 are connected in series on both ends of the live wire disconnect switch 312 and the neutral wire disconnect switch 322. When the test switch G51 is connected, the current transformer 23 senses the current and transmits it to the disconnection control circuit 2 to control the disconnection control component 21 to operate, so that the live line disconnection switch 312 and the neutral line disconnection switch 322 are turned off.

The resistance value of the resistor and the capacity of the capacitor in the embodiment 3 and embodiment 4 of the present invention can be flexibly set according to actual application requirements and safety regulations. In the embodiment of the present invention, resistor A111, resistor B121, resistor C131, and resistor D314 The resistor E324 uses a 470KΩ resistor; the resistor F334 uses a 1MΩ resistor, the capacitor A313 and the capacitor B323 use a 820PF capacitor; the capacitor C115 uses a 470PF capacitor. The resistor A111, the resistor B121, the resistor C131, the resistor D314, and the resistor E324 play the role of isolated power supply for the charging control device 1; the resistor F334, the capacitor D333, the resistor D314, the resistor E324, the capacitor A313, and the capacitor B323 form a circuit loop. At the same time, the ground wire port 33 and the neutral wire port 32, and the ground wire port 33 and the live wire port 31 are safely isolated.

Working principle of embodiment 3 and embodiment 4 of the present invention: working principle of the present invention: the ground wire port 33 is electrically connected to the C terminal of the rectifying component 101 through a resistor F334, and the D terminal of the rectifying component 101 is connected to the live wire port through a resistor D314 and a resistor E324, respectively 31. The neutral port 32 is electrically connected; the A end of the rectifying component 101 is electrically connected to one end of the thyristor 104, the other end of the thyristor 104 is electrically connected to the positive electrode of the LED lamp 105, and the negative electrode of the LED lamp 105 is electrically connected to the rectifying component 101 The B terminal of the rectifying component 101 is electrically connected; the A terminal and the B terminal of the rectifying component 101 are provided with a capacitor 102; the A terminal of the rectifying component 101 is also provided with a bidirectional diode 103 that is electrically connected to the control electrode of the thyristor 104; The C terminal and D terminal of the charging control device 1 form a circuit loop. The test terminal 11 is the C terminal. In electrical equipment without a ground wire, the ground port 33 is shown as a conductive component that can be touched with the human body, such as a metal shell of a household appliance or electrical device.

The bidirectional diode 103 can be set to one or more in series, and the embodiment of the present invention is set to four in series. The capacity of the capacitor 102 can be set according to actual applications. The charging component of the embodiment of the present invention is set as the capacitor 102, and the capacity is set to 2-10 nF.

Embodiment 5 and Embodiment 6 of the present invention: the main control board 2 is identified as the power-off control circuit 2, and the power-off control circuit 21 is identified as the circuit-breaking control component 21. As shown in Figure 5, Figure 6, Figure 8, Figure 9, Figure 10, the charging control circuit 1 is provided with a test terminal 11 and a sensing terminal 133; the test terminal 11 is electrically connected to the ground port 33; The sensing terminal 133 is electrically connected to the live wire port 31 and the neutral wire port 32 through components; a control switch 61 is provided, and the control switch 61 is serially connected between the test terminal 11 and the ground wire port 33; the live control circuit 1 is electrically connected to the open circuit control circuit 2 or connected with an electrical signal. The control switch 61 can be set as an electronic control switch 61, or can be set as a manual control switch 61.

The disconnection control circuit 2 is provided with a disconnection control component 21, a live disconnection switch 312, a neutral disconnection switch 322, and a ground disconnection switch 332; the disconnection control circuit 2 can control the live disconnection switch 312, the neutral disconnection switch 322, and the ground. The line disconnect switch 332 is turned off.

A ground detection circuit 6 is provided, and the ground detection circuit 6 detects the connection and disconnection of the ground; a switch control circuit 62 is provided, and the switch control circuit 62 is electrically connected to the ground detection circuit 6. The switch control circuit 62 controls the connection and disconnection of the control switch 61 according to the signal output by the ground detection circuit 6.

When the switch control circuit 62 receives the control signal output by the ground detection circuit 6, the switch control circuit 62 controls the control switch 61 to be connected; when the ground detection circuit 6 does not output a control signal, the switch control circuit 62 controls the control switch 61 to turn off open.

The control scheme of the home appliance can also be set as follows: when the switch control circuit 62 receives the ground wire detection circuit 6 output control signal, the switch control circuit 62 controls the control switch 61 to turn off; when the switch control circuit 62 does not receive the ground wire When the control signal output by the detection circuit 6 is detected, the switch control circuit 62 controls the control switch 61 to be connected, so that when the ground detection circuit 6 fails and no control signal is output, the household electrical appliances have double leakage protection, which has a better protection effect.

The sensing terminal 133 of the charged control circuit 1 is electrically connected to the live wire port 31 through a resistor D314, or the sensing terminal 133 of the charged control circuit 1 is electrically connected to the live wire port 31 through a capacitor A313; the sensing terminal 133 of the charged control circuit 1 is electrically connected through a resistor E324 is electrically connected to the neutral port 32, or the sensing terminal 133 of the charging control circuit 1 is electrically connected to the neutral port 32 via a capacitor B323.

The test terminal 11 of the charging control circuit 1 is provided with a resistor F334 to be electrically connected to the ground port 33, or the test terminal 11 of the charging control circuit 1 is provided with a capacitor D333 to be electrically connected to the ground port 33.

A capacitor C115 is provided and connected to the sensing terminal 133 and the testing terminal 11 of the charging control circuit 1. The capacitor C can have the technical effect of reducing external interference.

A warning component 12 is provided on the household appliance, and the warning component 12 can be arranged on the charging control circuit 1 or on other circuits. The present invention is arranged on the charging control circuit 1. The disconnection control circuit 2 is provided with a current transformer 23; when the current transformer 23 is unbalanced between the neutral line 321 and the live line 311, it can output a control signal to the disconnection control circuit 2 to disconnect the disconnection switch.

A test switch A112 is provided, one end of the test switch A112 is electrically connected to the test terminal 11 of the charged control circuit 1, and the other end of the test switch A112 is electrically connected to the live wire port 31 and the neutral wire port 32 through components. The component can be a resistor, a capacitor, or other components that can achieve the above-mentioned technical effects. The embodiment of the present invention is a resistor.

The present invention limits and reduces the voltage of the circuit through components, and changes the voltage and current into safe voltage and current. In the absence of a ground wire, when using household appliances, you can conduct safety tests on the conductive parts of the housing of the household appliances or electrical equipment, and test whether the conductive parts of the housing are in contact with the live wire 311 and the neutral wire 321. It will not cause a disconnect switch. Disconnect, it will not affect the normal use of the electrical appliance, making the use of the electrical appliance safer and more convenient. At the same time, it also realizes the electric appliance's micro-current leakage warning effect when there is a ground wire, and avoids the safety hazard of the electric appliance's micro-current leakage.

In order to be able to determine whether the charging control circuit 1 is working normally, a test switch A112 and a resistance F334 are provided; one end of the test switch A112 and the resistance F334 is electrically connected to the test terminal 11 of the charging control circuit 1, and the other end of the test switch A112 is connected to the live wire The port 31 is electrically connected, or the other end of the test switch A112 is electrically connected to the live port 31 via a resistor A111, and is electrically connected to the neutral port 32 via a resistor B121; the other end of the resistor F334 is electrically connected to the ground port 33.

A test switch B113 is provided. One end of the test switch B113 is electrically connected to the test terminal 11 of the charged control circuit 1, and the other end of the test switch B113 is electrically connected to the output terminal of the live wire disconnect switch 312; or the other end of the test switch B113 is connected through a resistor C131 It is electrically connected to the output terminal of the live wire disconnect switch 312.

A test switch C122 is provided. One end of the test switch C122 is electrically connected to the test terminal 11 of the charged control circuit 1, and the other end of the test switch C122 is electrically connected to the neutral line port 32, or the other end of the test switch C122 is connected to the neutral line via a resistor B121 Port 32 is electrically connected. The two ends of the test switch A112 and the test switch C122 can be connected in parallel.

The resistance value of the resistor and the capacitance of the capacitor in the fifth and sixth embodiments of the present invention can be flexibly set according to the actual application to ensure the normal operation of the circuit and the requirements of safety regulations. The resistor B121, the resistor C131, the resistor D314, the resistor E324, and the resistor F334 use a 510KΩ resistor; the capacitor A313 and the capacitor B323 use a capacitor of 820PF; and the capacitor C115 uses a capacitor of 470PF. The resistor A111, the resistor B121, the resistor C131, the resistor D314, and the resistor E324 play the role of isolated power supply for the charging control circuit 1; the resistor F334, the capacitor D333, the resistor D314, the resistor E324, the capacitor A313, and the capacitor B323 form a circuit loop. At the same time, the ground wire port 33 and the neutral wire port 32, and the ground wire port 33 and the live wire port 31 are safely isolated.

The working principle of embodiment 5 and embodiment 6 of the present invention: the ground wire port 33 is electrically connected to the C terminal of the rectifying component 101 through a resistor F334, and the D terminal of the rectifying component 101 is respectively connected to the live wire port 31 and the neutral wire port through a resistor D314 and a resistor E324. 32 is electrically connected; the A end of the rectifier component 101 is electrically connected to one end of the thyristor 104, the other end of the thyristor 104 is electrically connected to the positive electrode of the LED lamp 105, and the negative electrode of the LED lamp 105 is electrically connected to the B end of the rectifier component 101 The A terminal and B terminal of the rectifying component 101 are provided with capacitors 102; the A terminal of the rectifying component 101 is also provided with a bidirectional diode 103 that is electrically connected to the control electrode of the thyristor 104; C terminal and D terminal form a circuit loop. The test terminal 11 is the C terminal, and the sensing terminal 133 is the D terminal. In electrical equipment without a ground wire, the ground port 33 is represented as a conductive component that can be touched by the human body, such as a metal shell of a household appliance or electrical device. The output control signal can be set at the output terminal of the silicon controlled silicon 104.

The bidirectional diode 103 can be set as one or more than one in series, and the capacity of the capacitor 102 can be set according to actual applications. The charging component in the embodiment of the present invention is set as the capacitor 102, and the capacity is set to 100 nF. The technical solution of the present invention adopts the above circuit to realize circuit control, and other circuits can also be used to realize the effect of the above technical solution. The charging control circuit 1 of the present invention can also be applied as a ground detection circuit 6.

The output terminal of the charged control circuit 1 can also be isolated by a photocoupler, so that the control signal sampling circuit is electrically isolated from the control circuit. The size of the capacitance of the capacitor 102 can be adjusted to the frequency of conducting the thyristor and the size of the output current. When the control switch 61 is set to automatic control, the ground wire detection circuit 6 can be set to automatically self-check the interval time to further ensure the safety of electricity consumption of the electrical equipment connected to the output port 4 of the present invention.

The working process of Embodiment 1 of the present invention; as shown in Figure 1 and Figure 6:

1. Connect the power to the power port 3 of the household appliance.

2. When the home power grid is abnormal and the ground wire port 33 is live, the charging control circuit 1 controls the warning component 12 to issue a warning to remind the user that the home power grid is leaking and the power supply cannot be used.

3. When the household power grid is normal and the ground wire is not energized, the ground wire port 33 is energized when the household appliance leaks, or the metal part 5 of the household appliance housing is energized, and the live control circuit 1 outputs the control voltage or signal to the main control board 2. The control board 2 controls the disconnection control circuit 21 to turn off the control switch 22, prompting the user of the leakage of the household appliance and taking measures in time.

The working process of Embodiment 2 of the present invention; as shown in Figure 1 and Figure 7:

1. Connect the power to the power port 3 of the household appliance.

2. When the home power grid is abnormal and the ground wire port 33 is live, the charging control device 1 controls the warning component 12 to issue a warning to remind the user that the home power grid is leaking and the power supply cannot be used.

3. When the home power grid is normal and the ground wire port 33 is not live, the test switch A112 is connected, and the warning component 12 issues a warning, indicating that the live control circuit 1 is working normally.

4. When the household appliance is working normally, the test switch B113 or the test switch A112 is connected, the charged control circuit 1 outputs a control voltage or signal to the main control board 2, and the main control board 2 controls the circuit breaker control circuit 21 to turn off the electric control switch 22.

5. When the home appliance leaks, the ground port 33 is charged, or the metal part of the housing 5 and the live parts that can be touched by the human body are charged, the control circuit 1 outputs the control voltage or signal to the main control board 2, and the main control board 2 controls the circuit breaker control circuit 21 Turn off the electric control switch 22 to remind the user that electrical equipment is leaking, and take measures in time.

The working process of Embodiment 3 of the present invention; as shown in Figure 3 and Figure 9:

1. Connect the power to the input terminal of the household appliance.

2. When the home power grid is abnormal and the ground wire port 33 touches the live wire 311 or the neutral wire 321 is live, the charging control device 1 controls the warning component 12 to issue a warning to remind the user that the home power grid is leaking and the power supply cannot be used.

3. When the home power grid is normal and the ground wire port 33 is not live, the test switch A112 is connected, and the warning component 12 issues a warning, indicating that the live control device 1 is working normally.

4. Turn on the circuit breaker. When the electrical equipment is working normally, connect the test switch B113 or the test switch A112, the charging control device 1 outputs the control voltage or signal to the circuit breaker control circuit 2, and the circuit breaker control circuit 2 controls the circuit breaker control part 21 to open Disconnect switch.

5. Turn on the circuit breaker. When the electrical equipment leaks, the ground wire port 33 is electrified. The electrification control device 1 outputs a control voltage or signal to the circuit breaker control circuit 2. The circuit breaker control circuit 2 controls the circuit breaker control component 21 to turn off the circuit breaker, prompting the user of the electrical appliance If the equipment leaks electricity, take measures in time.

The working process of Embodiment 4 of the present invention; as shown in Figure 4 and Figure 9:

1. Connect the power to the input terminal of the household appliance.

4. Turn on the disconnect switch, when the electrical equipment is normal, connect the test switch B113 or the test switch A112, the charging control device 1 outputs a control voltage or signal to the disconnect control circuit 2, and the disconnect control circuit 2 controls the disconnect control component 21 to disconnect the disconnect switch .

5. Turn on the disconnect switch. When the electrical equipment is normal, connect the test switch C51, the current transformer 23 outputs the control voltage to the disconnect control circuit 2, and the disconnect control circuit 2 controls the disconnect control component 21 to turn off the disconnect switch.

6. Turn on the circuit breaker. When the electrical equipment leaks, the ground wire port 33 is electrified, and the electrification control device 1 outputs a control voltage or signal to the circuit breaker control circuit 2. The circuit breaker control circuit 2 controls the circuit breaker control component 21 to turn off the circuit breaker, prompting the user of the electrical appliance If the equipment leaks electricity, take measures in time.

7. Turn on the circuit breaker. When the electrical equipment leaks and the currents of the neutral line 321 and the live line 311 are unbalanced, the current transformer 23 outputs the control voltage to the circuit breaker control circuit 2, and the circuit breaker control circuit 2 controls the circuit breaker control component 21 to switch off the circuit breaker , Prompt the user of electrical equipment leakage and take measures in time.

The working process of Embodiment 5 of the present invention; as shown in Figure 5 and Figure 9:

1. Connect the power to the input terminal of the household appliance.

2. When the home power grid is abnormal and the ground wire port 33 touches the live wire 311 or the neutral wire 321 is live, the charging control circuit 1 controls the warning component 12 to issue a warning to remind the user that the home power grid is leaking and the power supply cannot be used.

4. Turn on the disconnect switch. When the electrical equipment is normal, connect the test switch B113 or the test switch A112, the charging control circuit 1 outputs the control voltage or signal to the disconnect control circuit 2, and the disconnect control circuit 2 controls the disconnect control component 21 to disconnect the disconnect switch .

6. Turn on the circuit breaker. When the electrical equipment leaks, the ground wire port 33 is electrified. The electrification control circuit 1 outputs a control voltage or signal to the circuit breaker control circuit 2, and the circuit breaker control circuit 2 controls the circuit breaker control component 21 to turn off the circuit breaker to remind the user of the electrical appliances. If the equipment leaks electricity, take measures in time.

The working process of Embodiment 6 of the present invention; as shown in Fig. 6 and Fig. 9:

1. The input terminal of the household appliance is connected to the mains.

2. The household appliance performs self-check. When the ground wire is detected to be disconnected, the control switch 61 is connected; when the ground wire is detected to be connected, the control switch 61 is disconnected.

3. Turn on the disconnect switch. When the ground wire of the household power grid is disconnected, the control circuit 62 controls the control switch 61 to be connected; when the ground wire port 33 of the electrical equipment connected to the household appliance touches the live wire or the neutral wire, it is electrified The control circuit 1 outputs a control voltage or signal to the disconnection control circuit 2, and the disconnection control circuit 2 controls the disconnection control component 21 to turn off the disconnection switch.

4. Turn on the disconnect switch. When the home power grid ground wire is connected, the control circuit 62 controls the control switch 61 to turn off; when the ground wire port 33 of the electrical equipment connected to the household appliance touches the live wire or the neutral wire, The current transformer 23 outputs a control signal to the circuit breaker control circuit 2, and the circuit breaker control circuit 2 controls the circuit breaker control component 21 to turn off the circuit breaker switch, prompting the user of electrical equipment leakage, and taking measures in time.

The above gives a further introduction to a household appliance in the embodiment of the present invention. In this article, specific embodiments are applied to explain the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the core of the principle of the present invention. Ideas: For those of ordinary skill in the art, according to the ideas of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as limiting the present invention.

Claims

A household appliance, comprising a housing, a main control board (2), and a live control circuit (1); it is characterized in that: a live wire port (31), a neutral wire port (32), and a main control board (2) are provided in the housing 1. Charge control circuit (1); The charge control circuit (1) is provided with a test terminal (11) and a sensing terminal (133); the test terminal (11) of the charge control circuit (1) and the metal shell The component (5) or the conductive component that can be touched by the human body is electrically connected; the main control board (2) is electrically connected to the power port (3), and the main control board (2) is provided with a disconnection control circuit (21); the disconnection The electric control circuit (21) controls the on and off of the electric control switch (22); the electrification control circuit (1) is electrically connected with the main control board (2).
The household appliance according to claim 1, characterized in that: the power port (3) is provided with a ground wire port (33), and the ground wire port (33) is electrically connected to the metal part (5) of the housing, or The ground wire port (33) is electrically connected with conductive parts that can be touched by the human body.
The household appliance according to claim 1, characterized in that: a neutral wire (321) and a sensing component (13) are provided in close combination and insulated from each other; or a neutral wire (321), a live wire (311) and The sensing parts (13) are close to the combination and insulated from each other.
The household appliance according to claim 1, characterized in that: the sensing end (133) of the charging control circuit (1) is electrically connected to the live port (31) and the neutral port (32) via components; the charging control circuit The test terminal (11) of (1) is electrically connected with the ground wire port (33) through the component.
The household appliance according to claim 1, characterized in that: the sensing end (133) of the charging control circuit (1) is electrically connected to the live wire port (31) via a resistor D (314), or the charging control circuit (1) The sensing end (133) is electrically connected to the live port (31) via the capacitor A (313); the sensing end (133) of the charged control circuit (1) is electrically connected to the neutral port (32) via the resistor E (324) , Or the sensing end (133) of the live control circuit (1) is electrically connected to the neutral port (32) via the capacitor B (323); the test end (11) of the live control circuit (1) is provided with a resistance F (334) It is electrically connected to the ground wire port (33), or the test terminal (11) of the charging control circuit (1) is provided with a capacitor D (333) and is electrically connected to the ground wire port (33).
The household appliance according to claim 1, characterized in that: the electric control switch (22) is provided with a live wire disconnect switch (312), a neutral wire disconnect switch (322), or the electric control switch (22) is provided with Live wire disconnect switch (312), neutral wire disconnect switch (322), ground wire disconnect switch (332).
The household appliance according to claim 1, characterized in that: a capacitor C (115) is provided and connected to the sensing terminal (133) and the test terminal (11) of the charging control circuit (1); the household appliance is provided with A warning component (12); a current transformer (23) is arranged on the open circuit control circuit (2).
The household appliance according to claim 1, characterized in that: a control switch (61) is provided, and the control switch (61) is connected in series between the test terminal (11) and the ground port (33); Ground detection circuit (6), the ground detection circuit (6) detects the connection and disconnection of the ground; there is a switch control circuit (62), the switch control circuit (62) and the ground detection circuit (6) ) Electrical connection.
The household appliance according to claim 1, characterized in that: when the ground wire detection circuit (6) outputs a control signal, the switch control circuit (62) controls the control switch (61) to be connected, and the ground wire detection circuit (6) When no control signal is output, the switch control circuit (62) controls the control switch (61) to turn off; or when the ground wire detection circuit (6) outputs a control signal, the switch control circuit (62) controls the control switch (61) to turn off When the ground detection circuit (6) does not output a control signal, the switch control circuit (62) controls the control switch (61) to be connected.
The household appliance according to claim 1, characterized in that: a test switch A (112) is provided, one end of the test switch A (112) is electrically connected to the test terminal (11) of the charged control circuit (1), The other end of the test switch A (112) is electrically connected to the live wire disconnect switch (312); or a test switch A (112) is provided, and one end of the test switch A (112) is connected to the test terminal ( 11) Electrical connection, the other end of the test switch A (112) is electrically connected to the input end of the live wire disconnect switch (312), a test switch B (113) is provided, and one end of the test switch B (113) is connected to the live control circuit (1) The test terminal (11) of the test switch B (113) is electrically connected, and the other end of the test switch B (113) is electrically connected to the output terminal of the live wire disconnect switch (312); or a resistor A (111) is provided, and one end of the resistor A (111) is connected to The live wire port (31) is electrically connected, and the other end of the resistor A is electrically connected to the test terminal of the charged control circuit (1), or the other end of the resistor A is electrically connected to the test terminal of the charged control circuit (1) through the test switch A (112). Connected with a resistor B (121), one end of the resistor B (121) is electrically connected to the neutral port (32), and the other end of the resistor B is electrically connected to the test terminal of the charged control circuit (1), or resistor B The other end is electrically connected to the test end of the live control circuit (1) via the test switch C, and is provided with a resistor C (131). One end of the resistor C (131) is electrically connected to the output end of the live wire disconnect switch (312). The other end of C (131) is electrically connected to the test end of the charging control circuit (1), or the other end of the resistor C (131) is electrically connected to the test end of the charging control circuit (1) via the test switch B.