CN113093616A - Switching circuit, intelligent switch and control system - Google Patents
Switching circuit, intelligent switch and control system Download PDFInfo
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- CN113093616A CN113093616A CN202110365189.4A CN202110365189A CN113093616A CN 113093616 A CN113093616 A CN 113093616A CN 202110365189 A CN202110365189 A CN 202110365189A CN 113093616 A CN113093616 A CN 113093616A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The present disclosure relates to a switching circuit, an intelligent switch and a control system, the switching circuit includes: the main control switch unit is connected with the load; the auxiliary control switch unit is connected with the main control switch unit in parallel to form a switch group and controls the on-off of the load together with the main control switch unit; the master switch unit includes: a power supply unit; a pull-up resistor connected to the power supply unit; the control unit is respectively connected with the power supply unit and the pull-up resistor; the main control switch is respectively connected with the control unit and the pull-up resistor; the control unit responds to the state of the main control switch or the auxiliary control switch unit and controls the on-off of the load. The auxiliary control switch units included in the circuit are not limited in type and can be connected to the main control switch unit in a parallel connection mode to form a switch group, so that the circuit layout is simplified, and the on-off of a load is controlled in a multi-control switch mode. Meanwhile, the load is controlled by the main control switch unit, the auxiliary control switch unit is added, and the power consumption in the switch circuit cannot be improved.
Description
Technical Field
The disclosure relates to the technical field of intelligent switches, in particular to a switch circuit, an intelligent switch and a control system.
Background
With the development of the smart home industry, the smart electrical appliances gradually enter the daily life of people. The user can realize remote control of the electrical appliance, such as controlling on and off of the electrical appliance, adjusting parameter state and the like, through third-party software or an intelligent switch arranged in the terminal equipment.
Different electrical appliances have different application scenes, for example, when the electrical appliances are lamps, switches need to be arranged at different positions to control the same electrical appliance, and the use requirements of users are met.
However, the intelligent switch usually adopts a third-party software mode to realize a control program, and the wiring mode of the intelligent switch has no compatibility and cannot be used in combination with other types of switches.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a switching circuit, an intelligent switch, and a control system.
According to a first aspect of embodiments of the present disclosure, there is provided a switching circuit, the switching circuit including:
the main control switch unit is connected with the load;
the auxiliary control switch unit is connected to the main control switch unit in parallel to form a switch group and controls the on-off of the load together with the main control switch unit;
the main control switch unit includes:
a power supply unit;
a pull-up resistor connected to the power supply unit;
the control unit is respectively connected with the power supply unit and the pull-up resistor;
the main control switch is respectively connected with the control unit and the pull-up resistor;
the control unit responds to the state of the main control switch or the auxiliary control switch unit and controls the on-off of the load.
In some embodiments, the current input terminal of the main control switch unit is connected to the live wire, and the load is connected to the current output terminal of the main control switch unit and the neutral wire, respectively.
In some embodiments, the secondary control switch unit includes a first type of switch connected in parallel with the main control switch.
In some embodiments, the secondary switch unit includes a first type of switch, and the first type of switch is connected to the live line and connected in parallel between the current input terminal of the main switch unit and the main switch.
In some embodiments, the master switch unit includes:
the protection circuit is arranged between the control unit and the main control switch;
the protection circuit is used for adjusting the current value or the voltage value flowing to the main control switch from the control unit.
In some embodiments, the protection circuit includes:
the first-stage protection unit is respectively connected with the main control switch and the pull-up resistor;
the first-stage protection unit and the main control switch are grounded together.
In some embodiments, the first level protection unit comprises:
the thermistor is connected to a public port of the control unit;
and the bidirectional conducting piece is arranged between the thermistor and the main control switch so as to limit the voltage value input by the common port of the control unit.
In some embodiments, the protection circuit further comprises:
the isolation unit is respectively connected with the main control switch and the pull-up resistor;
wherein, the isolation unit and the main control switch are grounded together.
In some embodiments, the isolation unit comprises:
the first one-way conduction piece is respectively connected with the pull-up resistor piece and the power supply unit and used for preventing the current output by the public port of the control unit from flowing to the power supply unit;
the first resistor is connected into the power supply unit;
and the triode switch is respectively connected with the first resistor and the main control switch.
In some embodiments, the protection circuit further comprises:
and the second-stage protection unit is connected to the isolation unit, and the second-stage protection unit and the isolation unit are grounded together.
In some embodiments, the second-level protection unit further comprises:
the second resistor is arranged between the isolation unit and the first port of the control unit;
and the second one-way conduction piece is connected between the second resistor and the first port of the control unit.
In some embodiments, the secondary switch unit comprises a second type of switch connected in parallel with the main switch to the load.
In some embodiments, the second type of switch comprises:
a secondary power supply unit;
a sub control unit connected to the sub power supply unit;
the auxiliary control switch is respectively connected with the auxiliary control unit and the auxiliary power supply unit, and the auxiliary control unit and the auxiliary control switch are grounded together;
the auxiliary control switch is connected to the main control switch in a parallel mode.
In some embodiments, the switching circuit further comprises:
the switching circuit is arranged between the current output end of the main control switch unit and the current output end of the second-type switch, so that the current output end of the main control switch unit is connected to the load; or the current output end of the second type switch is connected to the load.
According to a second aspect of embodiments of the present disclosure, there is provided an intelligent switch comprising the switching circuit of any one of the above mentioned.
According to a third aspect of embodiments of the present disclosure, there is provided a control system including:
the intelligent switch mentioned above is connected with a live wire;
the load is respectively connected with the zero line and the intelligent switch; and
and the terminal is connected with the intelligent switch in a wireless network and is used for controlling the on-off of the intelligent switch.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the auxiliary control switch units included in the circuit are not limited in type and can be connected to the main control switch unit in a parallel connection mode to form a switch group, so that the circuit layout is simplified, and the on-off of a load is controlled in a multi-control switch mode. Meanwhile, the load is controlled by the main control switch unit, the auxiliary control switch unit is added, and the power consumption in the switch circuit cannot be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram illustrating a switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 2 is a block diagram illustrating another switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 3 is a schematic diagram illustrating a switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 4 is a schematic diagram illustrating another switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 5 is a schematic diagram illustrating yet another switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 6 is a schematic diagram illustrating yet another switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 7 is a schematic diagram illustrating a switching circuit control according to an exemplary embodiment of the present disclosure.
Fig. 8 is a schematic diagram illustrating a protection circuit according to an exemplary embodiment of the present disclosure.
Fig. 9 is a schematic diagram illustrating a switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 10 is a schematic diagram illustrating yet another switching circuit according to an exemplary embodiment of the present disclosure.
Fig. 11 is a schematic diagram illustrating another switchable primary and secondary switch cell circuit according to an exemplary embodiment of the present disclosure.
Fig. 12 is a schematic diagram illustrating yet another switching circuit according to an exemplary embodiment of the present disclosure.
FIG. 13 is a schematic diagram illustrating a control system according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
In the related art, the intelligent switch mainly includes a single-fire switch form and a zero-fire switch form. In order to control the load at any time, the switching circuit needs to be constantly connected. For the electric appliance in the non-working state, the power consumption of the switch circuit needs to be lower than a preset value, so that the electric appliance can not flicker.
Under the multi-control switch mode, along with the increase of the number of the intelligent switches, the power consumption of the switch circuit cannot be guaranteed to be lower than a preset value, and the accurate control of the switch circuit on the electric appliance may be influenced.
Meanwhile, in the existing user family, the wiring is usually arranged in the wall to improve the aesthetic property. However, the switch circuit structure of the intelligent switch is complex, and the intelligent switch cannot be changed at will, cannot be adapted to switches of different types, and is not beneficial to replacing switches of other types in the later period.
The present disclosure provides a switching circuit, which includes a main control switch unit connected to a load. The switch circuit also comprises at least one auxiliary control switch unit which is connected with the main control switch unit in parallel to form a switch group, and the at least one auxiliary control switch unit and the main control switch unit jointly control the on-off of the load. The main control switch unit comprises a power supply unit, a pull-up resistor and a control unit, the pull-up resistor is connected to the power supply unit, and the control unit is connected with the power supply unit and the pull-up resistor respectively. The main control switch unit further comprises a main control switch, and the main control switch is connected with the control unit and the pull-up resistor respectively. The control unit responds to the state of the main control switch or the auxiliary control switch unit and controls the on-off of the load. The auxiliary control switch units included in the circuit are not limited in type and can be connected to the main control switch unit in a parallel connection mode to form a switch group, so that the circuit layout is simplified, and the on-off of a load is controlled in a multi-control switch mode. Meanwhile, the load is controlled by the main control switch unit, the auxiliary control switch unit is added, and the power consumption in the switch circuit cannot be improved.
In an exemplary embodiment, as shown in fig. 1-12, a switching circuit includes a load 1, a main control switching unit 2, and at least one sub-control switching unit 3.
The main control switch unit 2 is connected to the load 1, the current input end of the main control switch unit 2 can be connected with the live wire 4, and the load 1 is respectively connected with the current output end of the main control switch unit 2 and the zero line 5, so that the live wire 4, the main control switch unit 2, the load 1 and the zero line 5 form a power-on loop.
The load 1 comprises an electrical appliance and a connecting wire, and the electrical appliance is respectively communicated with the zero line 5 and the main control switch unit 2 through the connecting wire. The electrical appliance can be a lamp, an air conditioner or a water heater and other equipment.
Wherein, the main control switch unit 2 may be provided with a first terminal 21 and a second terminal 22.
The first terminal 21 may be a current input terminal of the main control switch unit 2, and the live wire 4 is connected to the first terminal 21 to connect the main control switch unit 2 and the live wire 4.
The second terminal 22 may be a current output terminal of the main control switch unit 2, and a connection wire of the electrical appliance is connected to the second terminal 22 to connect the main control switch unit 2 and the electrical appliance.
At least one auxiliary control switch unit 3 is connected with the main control switch unit 2 in parallel, the at least one auxiliary control switch unit 3 and the main control switch unit 2 form a switch group and jointly control the on-off of the load 1, the double-control switch mode or the multi-control switch mode of the switch circuit is realized, and the control of the load under different scenes is met.
In the present embodiment, the main control switch unit 2 includes a pull-up resistor 27, a power supply unit 23, a control unit 24, and a main control switch 25. The main control switch 25 is, for example, a button type mechanical switch or a rocker type mechanical switch, and a user can apply an external force to the main control switch 25 to control the load 1.
The control unit 24 is connected to the power supply unit 23 and the pull-up resistor 27, respectively, and the main control switch 25 is connected to the control unit 24 and the pull-up resistor 27, respectively. Wherein the control unit 24 controls the on-off of the load 1 in response to the states of the main control switch 25 and the sub-control switch unit 3.
The control Unit 24 may be a Micro Controller Unit (MCU) or a Single Chip Microcomputer (Single Chip Microcomputer), and the control Unit 24 may operate an embedded program, perform signal detection, control a switch circuit, and perform wireless communication.
The control unit 24 is connected with a load control circuit 241, so that the control unit 24 can control the on/off of the load 1 through the load control circuit 241 to turn on or off the load.
The control unit 24 further includes a General-purpose input/output (GPIO), and the main control switch 25 is connected to the control unit 24 through the GPIO. The first end of the main control switch 25 is connected to the GPIO, and the second end of the main control switch 25 is grounded together with the control unit 24.
The power supply unit 23 includes a power taking circuit 231 and a power supply 232, the power taking circuit 231 is connected to the control unit 24 and the power supply 232, and the power supply 232 is disposed between the main control switch 25 and the power taking circuit 231.
When the external force of the user acts on the main control switch 25, the control unit 24 recognizes the state of the main control switch 25 by detecting the change of the level state of the GPIO, and then controls the load 1 to turn on or off the load in response to the state of the main control switch 25.
In some examples, the master switch 25 may be a push button type mechanical switch. In the initial state, the main control switch 25 is turned off, so that the GPIO and the ground are kept in the off state, and a high-level signal is output by the GPIO. When the user manually presses the main control switch 25, the main control switch 25 is closed, and the control unit 24 detects that the signal output by the GPIO is converted from a high-level signal to a low-level signal at this stage. When the user releases the main control switch 25, the control unit 24 detects that the signal output by the GPIO is converted from a low level signal to a high level signal at this stage, and the control unit 24 recognizes the change of the signal of the GPIO level, turns over the switch circuit to a corresponding state, and connects or disconnects the switch circuit.
The change in the signal of the GPIO level is recognized by the control unit 24 in this example to determine the user's action instruction to the master switch 25. The control unit 24 switches the on-off state of the load control circuit 241 according to the transition process between the high level signal and the low level signal by the control unit 24. When the control unit 24 obtains that the level signal of the GPIO is converted from the high level signal to the low level signal and then back to the high level signal, the switch circuit is switched to a state opposite to the current state of the switch circuit, and the switching operation is completed.
In other examples, the master switch 25 may be a rocker-type mechanical switch. When the main control switch 25 is in an off state, the GPIO and the ground are also in an off state, and a high-level signal is output by the GPIO. When the control unit 24 acquires the high level signal, it indicates that the key is not pressed.
When the main control switch 25 is in a closed state, the GPIO is grounded through the main control switch 25, and a low-level signal is output from the GPIO. The control unit 24 acquires the low level signal indicating that the key is pressed.
When the control unit 24 in this example acquires the high level signal, it indicates that the main control switch 25 is in the off state, and the control unit 24 controls the load control circuit 241 to be turned off, so that the load 1 is in the non-operating state; when the control unit 24 acquires the low level signal, it indicates that the main control switch 25 is in the closed state, and the control unit 24 controls the load control circuit 241 to be connected, so that the load 1 is in the working state, and further, the control of the load 1 is realized.
In some exemplary embodiments, as shown in fig. 1 and 3, the sub-control switch unit 3 includes a first type switch 31, and the first type switch 31 may be a button type mechanical switch or a rocker type mechanical switch. The first switch 31 is connected in parallel with the main control switch 25, the connection mode is simple, the connection relation between the main control switch unit 2 and the load 1 is not affected, and only the two ends of the first switch 31 are respectively connected to the two ends of the main control switch 25.
Referring to fig. 1 and 3, when a plurality of secondary switch units 3 are provided, after the plurality of secondary switch units 3 are respectively connected in parallel, one end of each secondary switch unit is connected to the general connection port 311 and is connected to the first end of the main switch 25 through the general connection port 311, and the other end of each secondary switch unit is connected to the ground reference port 312 and is connected to the other end of the main switch 25 through the ground reference port 312.
In some examples, the first type of switch 31 may be a push button type mechanical switch and the master switch may be a push button type mechanical switch. In the initial state, the main control switch 25 is turned off, and the first type switch 31 is turned off, so that the GPIO keeps the off state with the ground and the GPIO outputs a high-level signal. When the user manually presses the main control switch 25 or any one of the first type switches 31, the control unit 24 acquires the change of the signal of the GPIO, and turns over the switch circuit to the state opposite to the current state.
In other examples, the first type of switch 31 may be a rocker-type mechanical switch and the master switch 25 may also be a rocker-type mechanical switch. In the initial state, all the first type switches 31 and the main control switch 25 are in the off state, the GPIO and the ground are also in the off state, and a high-level signal is output by the GPIO. When the user acts on the main control switch 25 or any one of the first type switches 31, the GPIO is grounded through the closed switch, and a low-level signal is output by the GPIO. The control unit 24 controls the on/off of the load control circuit 241 according to the change of the signal of the level of the GPIO, so as to complete the switching of the switch circuit, thereby realizing the control of the load 1.
Here, it should be noted that the principle of the control unit 24 recognizing the switch change of the key type mechanical switch or the rocker type mechanical switch is the same as the manner in the above-mentioned embodiment, and the description thereof is omitted. Of course, the key type mechanical switch and the rocker type mechanical switch can be freely combined, and the identification manner is the same as that of the above embodiment. The switch circuit in this disclosure has a simple overall structure, sets up a plurality of secondary control switch units 3, also can not increase the consumption among the switch circuit, through the level state of the control unit 24 discernment GPIO to confirm the user to the expectation state of load, and carry out in this state, promote user's use and experience.
In some exemplary embodiments, as shown in fig. 2, 4-6, the secondary control switch unit 3 includes a first type switch 31, the first type switch 31 is connected to the live line 4 and is connected between the current input terminal of the main control switch unit 2 and the main control switch 25 in parallel, the current input terminal of the main control switch unit 2 is connected to the control unit 24 of the main control switch unit 2, and the control unit 24 is always kept in a ground state.
In some examples, as shown in fig. 2, 4, the first type of switch 31 may comprise a rocker type mechanical switch. The first end of the first switch 31 is connected with the live wire 4 and is located between the current input end of the main control switch unit 2 and the live wire 4, and the second end of the first switch 31 is connected with the first end of the main control switch 25, so that a single-way double-control switch mode of the switch is realized.
When a plurality of secondary control switch units 3 are arranged, the plurality of secondary control switch units 3 are respectively connected in parallel and then connected to the first connection port 313, and are connected with the first end of the main control switch 25 through the first connection port 313, so that a multi-control switch mode of the switch circuit is realized, and the switch circuit is suitable for different scenes. For example, a plurality of sub-control switch units may be respectively disposed on different wall surfaces of a bedroom scene, different positions of a living room scene, different positions of a bathroom scene, and the like.
In other examples, as shown in fig. 2 and 5, the first type of switch 31 may include a push button type mechanical switch. The connection mode and the achieved effect of the type are the same as those of the rocker-type mechanical switch, and the description is not repeated here.
When the plurality of secondary control switch units 3 are arranged, the plurality of secondary control switch units 3 are respectively connected in parallel and then connected to the second connection port 314, and are connected with the first end of the main control switch 25 through the second connection port 314, so that a multi-control switch mode of the switch circuit is realized.
In other examples, as shown in fig. 2 and 6, the first type of switch 31 may include a rocker type mechanical switch and a push button type mechanical switch, and the first type of switch 31 and the main control switch 25 together form a three-control switch mode of the switch circuit.
The first end of the key type mechanical switch is connected with the live wire 4 and is located between the current input end of the main control switch unit 2 and the live wire 4, and the second end of the key type mechanical switch is connected to the first connection port 313 and is connected with the first end of the main control switch 25 through the first connection port 313. The control unit 24 includes GPIO1, and the second terminals of the key-type mechanical switches are respectively connected to the GPIO1 of the power supply unit 2 and the control unit 24.
The first end of rocker type mechanical switch is connected with live wire 4 and is located between main control switch unit 2's current input end and live wire 4, and rocker type mechanical switch's second end inserts to second connection port 314 to be connected with main control switch 25's first end through second connection port 314. Wherein the control unit 24 comprises a GPIO2, and the second terminals of the rocker-type mechanical switches are respectively connected with the GPIO2 of the power supply unit 2 and the control unit 24.
Of course, it is understood that the above-mentioned settings regarding the types and number of the sub-control switch units 3 are only for explaining the present embodiment, and do not limit the present application. The sub-control switch unit 3 may include a plurality of button-type mechanical switches and a seesaw-type mechanical switch in combination with the main control switch 25 to form a multi-control switch mode. The sub-control switch unit 3 may further include a plurality of rocker-type mechanical switches and a key-type mechanical switch combined with the main control switch 25 to form a multi-control switch mode. The key type mechanical switch and the rocker type mechanical switch can be freely combined in any number, and only the mechanical switches of the same type are connected in parallel and then connected into the corresponding connecting ports.
In this embodiment, referring to fig. 7, the power-taking circuit 231 may include a first power supply circuit 2311, a first end of the first power supply circuit 2311 is connected to the live wire 4, a second end of the first power supply circuit 2311 is an electrode end, the second end of the first power supply circuit 2311 is connected between the live wire 4 and the relay 2312, the relay 2312 is connected to the control unit 24, and the control unit 24 is connected to a third end of the first power supply circuit 2311. A first terminal of the first power supply circuit 2311 is commonly grounded with the control unit 24. The first power supply circuit 2311 may include a Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) power supply circuit, which is referred to as a MOSFET power supply circuit for short.
The power-taking circuit 231 further comprises a second power supply circuit 2313, a first end of the second power supply circuit 2313 is connected with the control unit 24, a second end of the second power supply circuit 2313 is connected between the load 1 and the relay 2312, and the load 1 is connected with the zero line 5. The third terminal of the second power supply circuit 2313 is commonly grounded with the control unit 24. The second power supply circuit 2313 may be an AC-DC power supply circuit for storing electrical energy, among other things.
The power supply circuit 231 further includes a diode 2314, for example, and the diode 2314 is connected between the live wire 4 and the relay 2312. Of course, it is understood that the diode 2314 is designed according to actual conditions, and the diode 2314 can be eliminated as appropriate. The specific design is case by case and is not set forth herein in detail.
When the control unit 24 detects that the main control switch 25 or the sub-control switch unit 3 is in the closed state, the control unit 24 controls the relay 2312 to switch the state of the load 1.
When the electrical appliance is in a working state, the first power supply circuit 2311 in the switch circuit supplies power to the control unit 24, so that the control unit 24 is ensured to be in the working state, and the control of a user on the switch circuit is supported.
When the electrical appliance is in a non-working state, the second power supply circuit 2313 in the switch circuit supplies power to the control unit 24, so that the control unit 24 is ensured to be in a working state.
In some exemplary embodiments, as shown in fig. 8, the main control switch unit 2 further includes a protection circuit 26, and the protection circuit 26 is disposed between the control unit 24 and the main control switch 25. The protection circuit 26 is used to adjust a current value or a voltage value flowing from the control unit 24 to the main control switch 25, and protect the switch circuit.
In this embodiment, referring to fig. 8, the protection circuit 26 includes a first-stage protection unit 261 connected to the main control switch 25 and the pull-up resistor 27, respectively, and the first-stage protection unit 261 and the main control switch 25 are commonly grounded. The first-stage protection unit 26 limits the current value and the voltage value input from the common port 242 of the control unit 24 to protect the common port 242 of the control unit 24.
The first-stage protection unit 261 includes a thermistor 2611 and a bidirectional conducting piece 2612.
The first end of the thermistor 2611 is connected to the common port 242 of the control unit 24, and when the current is too large, the thermistor 2611 generates heat, so that the resistance value is increased, the common port 242 of the control unit 24 is limited, and the control unit 24 is further protected.
The first terminal of the bidirectional conducting device 2612 is connected to the second terminal of the thermistor 2611 to limit the voltage value output from the common port 242 of the control unit 24, and the second terminal of the bidirectional conducting device 2612 and the main control switch 25 are commonly grounded.
The bidirectional conductive device 2612 is, for example, a bidirectional voltage regulator tube, and in an initial state, the bidirectional conductive device 2612 is in a non-conductive state. When the voltage flowing through the bidirectional conducting piece 2612 is higher than the preset value in a certain direction, the bidirectional conducting piece 2612 is in a conducting state, and therefore the voltage value in the circuit is prevented from being too high, and the circuit is protected.
In this embodiment, referring to fig. 8, the protection circuit 26 further includes an isolation unit 263, and the isolation unit 263 is connected to the main control switch 25 and the pull-up resistor 27, respectively. The isolation unit 263 is used to isolate the first port of the control unit 24 to protect the control unit 24. The isolation unit 263 and the main switch 25 are commonly grounded.
The isolation unit 263 isolates the first port 243 of the control unit 24, and when the voltage value output by the power supply unit 23 through the power supply voltage port 233 is 0V, the current output by the common port 242 of the control unit 24 does not flow into the first port 243 of the control unit 24, so as to further protect the main control switch unit 2 of the switch circuit.
In this embodiment, referring to fig. 8, the isolation unit 263 includes a first unidirectional conducting element 2631, a first resistor 2632, and a triode switch 2633.
The first one-way conductive element 2631 is respectively connected to the pull-up resistor 27 and the power supply unit 23, and the first one-way conductive element 2631 is used for preventing the current input from the common port 242 of the control unit 24 from flowing to the power supply unit 23. A first end of the first unidirectional conducting element 2631 may be connected to a first end of the pull-up resistor 27, and a second end of the first unidirectional conducting element 2631 is connected to the supply voltage port 233 of the power supply unit 23.
A first end of the first resistor 2632 is connected to a second end of the first unidirectional conducting element 2631 and is connected to the power supply voltage port 233.
The triode switch 2633 is connected to the first resistor 2632 and the main control switch 25, respectively. A first end of the transistor switch 2633 is connected to the second end of the first resistor 2632, a second end of the transistor switch 2633 is connected to the second end of the main control switch 25 and then grounded, and a third end of the transistor switch 2633 is connected to the first end of the main control switch 25.
It should be noted that the first terminal of the transistor 2633, the second terminal of the transistor 2633, and the third terminal of the transistor 2633 may be electrode terminals, and a specific electrode connection relationship is not specifically stated herein.
In this embodiment, referring to fig. 8, the protection circuit 26 further includes a second-stage protection unit 262, the second-stage protection unit 262 is connected to the isolation unit 263, and the second-stage protection unit 262 and the isolation unit 263 are commonly grounded. The second-stage protection unit 262 plays a role in limiting current and voltage for the first port 243 of the control unit 24, and further protects the first port 243 of the control unit 24, and the first port 243 of the control unit 24 may be a GPIO port.
The second-stage protection unit 262 further includes a second resistor 2621 and a second one-way conductive element 2622. The second resistor 2621 plays a role of voltage limiting, and protects the first port 243 of the control unit. The second unidirectional conductive element 2622 plays a role of current limiting, and protects the first port 243 of the control unit together with the second resistor 2621.
The second resistor 2621 is disposed between the isolation unit 263 and the first port 243 of the control unit 24. A first end of the second resistor 2621 is connected between the triode switch 2633 and the first resistor 2632, and a second end of the second resistor 2621 is connected to the first port 243 of the control unit 24.
The second unidirectional conductive element 2622 is connected between the second resistor 2621 and the first port 243 of the control unit 24. A first end of the second unidirectional conducting element 2622 is connected to a second end of the second resistor 2621 and commonly connected to the first port 243 of the control unit 24, and a second end of the second unidirectional conducting element 2622 is connected to the second end of the triode switch 2633 and then grounded. Wherein the second one-way conduction element 2622 points to the first port 243 of the control unit 24.
In this embodiment, the main control switch unit 2 and the auxiliary control switch unit 3 are connected to the live wire 4 in parallel, which belongs to a system of mixing strong current and weak current. When a user installs the switch circuit, a wrong connection may occur, for example, a strong current circuit is directly introduced into a weak current circuit, so that the control unit 24 in the main control switch unit 2 is burnt. Therefore, the protection circuit 26 is additionally arranged at the front stage of the first port 243 of the control unit 24 to protect the control unit 24, so that the safety of the switch circuit is further improved, and the potential safety hazard is reduced.
In an exemplary embodiment, as shown in fig. 2, 9-12, the secondary control switch unit 3 further comprises a second type switch 32, and the second type switch 32 may be a smart switch. The second type of switch 32 is connected in parallel with the main control switch 25 to the current conductor circuit 1. Wherein, the control unit 24 of the main control switch unit 2 is connected with the current input end of the main control switch unit 2, and the control unit 24 is always kept in the grounding state.
Referring to fig. 2, 10 and 12, the sub-control switch unit 3 includes a second type switch 32 and is connected to the main control switch 25. The main control switch 25 is used as a main control switch for controlling the on/off of the load 1. The second type switch 32 is a secondary switch, and can be connected in parallel with the main switch 25 through the universal connection port 311 and the live line 4. Based on the switch parallel principle, the double-control circuit formed by two single-fire switches is realized.
In the connection mode in this example, the main control switch 25 is used as a main switch, the second type switch 32 is used as an auxiliary switch, and once the switch installation is completed, the main and auxiliary roles in the switch circuit are determined, and the roles are to be modified, which can be realized only by changing the connection lines.
In practical application scenarios, a user may want to freely switch the main and auxiliary angles in the switch circuit according to practical use conditions. The switching circuit may for example also comprise a switching circuit 6.
As shown in fig. 9, the switching circuit 6 is disposed between the current output terminal of the main control switch unit 2 and the current input terminal of the main control switch unit 2, so that the current output terminal of the main control switch unit 2 is connected to the load 1. Alternatively, the current output terminal of the second type switch 32 of the secondary control switch unit 3 is connected to the load 1.
Referring to fig. 9, Lin is a current input terminal of the main control switch unit 2 and the sub control switch unit 3, respectively, and Lout is a current output terminal of the main control switch unit 2 and the sub control switch unit 3, respectively. A switch S2 is additionally provided between Lin of the main control switch unit 2 and Lout of the main control switch unit 2 or between Lin of the sub control switch unit 3 and Lout of the sub control switch unit 2, and is used for powering off the switch circuit.
When a user needs to replace or maintain the load 1, the physical power-off of the switch circuit can be realized by disconnecting any one switch S2, and the defect of the double-control switch mode in the prior art is overcome. In a double-control switch mode in the related technology, if an electric appliance is damaged, a user cannot judge whether a switch circuit can be physically powered off or not. In this embodiment, the power supply can be completely cut off by additionally providing the S2.
Meanwhile, a switch S3 is added between the switches S2 and Lout. The switch S3 may be a single-pole double-throw switch, the switch S3 is used to switch the main and auxiliary role switches in the switch circuit, when the switch S3 is connected to the first end, the auxiliary control switch unit 3 is in the main role, and the power supply unit 2 of the main control switch unit 2 is disconnected. When the S3 is connected to the second terminal, the main control switch unit 2 is the main role, and the power supply unit 2 is connected to the switch circuit.
The primary and secondary role switching between the primary switch unit 2 and the secondary switch unit 3 is realized by the switching circuit 6, and the schematic diagram of the dual-control circuit shown in fig. 11 can be realized by the switching circuit 6. The user can be according to actual need, main, vice control relation between the free change over switch to guarantee to have a main switch and a secondary switch in the switching circuit all the time, for switching circuit service, promote user's use and experience. In addition, the main switch and the auxiliary switch are in a symmetrical rotating state, so that a circuit can be simplified and the replacement, the maintenance and the like are convenient.
It is of course understood that the secondary switching unit 3 may comprise one, two or more switches 32 of the second type to implement a multi-controlled switching mode of the switching circuit. The number of the secondary control switch units 3 is not limited, and the secondary control switch units can be connected in parallel with the main control switch 25 through the universal connection port 311 and the live wire 4. For example, refer to the three control switch mode diagram shown in FIG. 10. When the number of the secondary control switch units 3 is plural, the connection mode is the same as the connection mode of the three-control switch mode, and the detailed description thereof is omitted here.
In the present embodiment, the second type switch 32 includes a sub power supply unit 321, a sub control unit 322, and a sub control switch 323. The sub-control unit 322 is connected to the sub-power supply unit 321, the sub-control switch 323 is connected to the sub-control unit 322 and the sub-power supply unit 321, respectively, and the sub-control unit 322 and the sub-control switch 323 are grounded in common. The sub-control switch 323 is connected to the main control switch 25 in parallel.
The internal connection relationship of the second type switch 32 is the same as that of the main control switch unit 2, and will not be described again. The sub-control unit 322 of the second type switch 32 is connected to the current input terminal of the sub-control switch unit 3, and the sub-control unit 322 is always kept at the ground state. The main control switch 25 of the main control switch unit 2 and the sub control switch 323 of the sub control switch unit 3 are connected to a general connection port 311, respectively.
The switching circuit that this disclosure provided, circuit layout is simple, and the current input end and the live wire of master switch unit are connected, and the current output end and the load of master switch unit are connected. Through the main control switch unit, realize the intelligent control to switch circuit. Meanwhile, the auxiliary control switch unit is connected in parallel based on the main control switch unit to realize a double-control switch mode, a three-control switch mode or a multi-control switch mode and the like of the switch circuit, so that the use requirements of users are met, and the user experience is improved. Besides the main control switch unit, the auxiliary control switch unit is not limited by types and can be suitable for mechanical switches or intelligent switches and the like. The complexity of circuit layout and switch connection is simplified as much as possible, the number of the auxiliary control switch units of wiring complexity is increased, the total power consumption of the switch circuit is not increased, the market demand is met, and the market competitiveness of the switch circuit is improved. And a protection circuit, a pull-up resistor and the like are arranged, so that the control unit can be effectively prevented from being burnt out due to reverse injection of a voltage signal, and the safety of the switch circuit is improved.
In addition, the control unit can adjust the detection strategy of the level change of the GPIO, and the switching circuit can be turned over. Utilize the live wire for a plurality of switches are grounded jointly, compatible multiple form promotes the diversification in the use.
The present disclosure also provides an intelligent switch, which includes the switch circuit in any of the above embodiments.
The disclosure also provides a control system, which comprises an intelligent switch, a load and a terminal. Wherein, intelligence switch and live wire are connected, and the load is connected with zero line and intelligence switch respectively to form the circular telegram return circuit. The terminal is connected with the intelligent switch in a wireless network and used for controlling the on-off of the intelligent switch, the requirements of intelligent home life of a user are met, and the intelligent switch can be remotely controlled at any time and any place.
In one exemplary embodiment, as shown in fig. 13, a control system includes a smart switch 7, a load 1, and a terminal 8. The load can be household appliances such as a water heater, a lamp and an air conditioner. The terminal can be a mobile phone, a tablet computer, a portable wearable device and the like, and can also be an APP end built in the terminal.
The intelligent switch 7 is connected with the live wire 4, and the load 1 is respectively connected with the zero line 5 and the intelligent switch 7 to form a loop. And the terminal 8 is in wireless network connection with the intelligent switch 7 and is used for controlling the on-off of the intelligent switch 7. Wherein, the terminal 8 can establish wireless communication connection with the intelligent switch 7 through modes such as wireless WIFI, internet of things, bluetooth, etc. so that the user can execute close-range control or remote control.
In an example, when the terminal 8 is connected to the intelligent switch 7 in a wireless network in the internet of things manner, if the terminal 8 is loaded with third-party software, the user may add the intelligent switch 7 to the third-party software, and control the intelligent switch 7 through the third-party software interface to turn on or off the load 1 and the fire wire 4, so as to switch the operating state of the load 1.
Here, it should be noted that the terminal 8 is not limited to the remote connection type control of the smart switch 7. The terminal 8 may also control the intelligent switch 7 in a short distance in a bluetooth or WIFI manner, which is not specifically stated herein.
Of course, it is understood that the intelligent switch 7 is not limited to being displayed on the terminal 8 by way of third party software, but the above is for illustrative purposes only. The intelligent switch 7 may also be an electrical device of the same manufacturer as the terminal 8, a floating navigation bar for controlling the intelligent switch 7 may be directly displayed in an interface of the terminal 8, and the on-off state of the intelligent switch 7 may be adjusted by touching an option of the floating navigation bar. The expression of the specific intelligent switch 7 is subject to the actual design, and is not specifically stated herein.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (16)
1. A switching circuit, comprising:
the main control switch unit is connected with the load;
the auxiliary control switch unit is connected to the main control switch unit in parallel to form a switch group and controls the on-off of the load together with the main control switch unit;
the main control switch unit includes:
a power supply unit;
a pull-up resistor connected to the power supply unit;
the control unit is respectively connected with the power supply unit and the pull-up resistor;
the main control switch is respectively connected with the control unit and the pull-up resistor;
the control unit responds to the state of the main control switch or the auxiliary control switch unit and controls the on-off of the load.
2. The switch circuit of claim 1, wherein the current input terminal of the main control switch unit is connected to a live line, and the load is connected to the current output terminal of the main control switch unit and a neutral line, respectively.
3. The switch circuit according to claim 2, wherein the secondary control switch unit comprises a first type of switch connected in parallel with the main control switch.
4. The switch circuit of claim 2, wherein the secondary switch unit comprises a first type of switch connected to the hot line and coupled in parallel between the current input of the main switch unit and the main switch.
5. The switch circuit of claim 1, wherein the master switch unit comprises:
the protection circuit is arranged between the control unit and the main control switch;
the protection circuit is used for adjusting the current value or the voltage value flowing to the main control switch from the control unit.
6. The switching circuit of claim 5, wherein the protection circuit comprises:
the first-stage protection unit is respectively connected with the main control switch and the pull-up resistor;
the first-stage protection unit and the main control switch are grounded together.
7. The switching circuit according to claim 6, wherein the first stage protection unit comprises:
the thermistor is connected to a public port of the control unit;
and the bidirectional conducting piece is arranged between the thermistor and the main control switch so as to limit the voltage value input by the common port of the control unit.
8. The switching circuit of claim 5, wherein the protection circuit further comprises:
the isolation unit is respectively connected with the main control switch and the pull-up resistor;
wherein, the isolation unit and the main control switch are grounded together.
9. The switching circuit according to claim 8, wherein the isolation unit comprises:
the first unidirectional conducting piece is respectively connected with the pull-up resistor piece and the power supply unit and used for preventing the current input by the public port of the control unit from flowing to the power supply unit;
the first resistor is connected into the power supply unit;
and the triode switch is respectively connected with the first resistor and the main control switch.
10. The switching circuit of claim 8, wherein the protection circuit further comprises:
and the second-stage protection unit is connected to the isolation unit, and the second-stage protection unit and the isolation unit are grounded together.
11. The switching circuit of claim 10, wherein the second stage protection unit further comprises:
the second resistor is arranged between the isolation unit and the first port of the control unit;
and the second one-way conduction piece is connected between the second resistor and the first port of the control unit.
12. The switch circuit of claim 1, wherein the secondary switch unit comprises a second type of switch connected in parallel with the primary switch to the load.
13. The switching circuit of claim 12, wherein the second type of switch comprises:
a secondary power supply unit;
a sub control unit connected to the sub power supply unit;
the auxiliary control switch is respectively connected with the auxiliary control unit and the auxiliary power supply unit, and the auxiliary control unit and the auxiliary control switch are grounded together;
the auxiliary control switch is connected to the main control switch in a parallel mode.
14. The switching circuit of claim 12, further comprising:
the switching circuit is arranged between the current output end of the main control switch unit and the current output end of the second-type switch, so that the current output end of the main control switch unit is connected to the load; or the current output end of the second type switch is connected to the load.
15. An intelligent switch, characterized in that it comprises a switching circuit according to any one of claims 1-14.
16. A control system, characterized in that the control system comprises:
the intelligent switch of claim 15, connected to a fire line;
the load is respectively connected with the zero line and the intelligent switch; and
and the terminal is connected with the intelligent switch in a wireless network and is used for controlling the on-off of the intelligent switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365189.4A CN113093616A (en) | 2021-04-02 | 2021-04-02 | Switching circuit, intelligent switch and control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365189.4A CN113093616A (en) | 2021-04-02 | 2021-04-02 | Switching circuit, intelligent switch and control system |
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| CN113093616A true CN113093616A (en) | 2021-07-09 |
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| CN202110365189.4A Pending CN113093616A (en) | 2021-04-02 | 2021-04-02 | Switching circuit, intelligent switch and control system |
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| CN101149412A (en) * | 2006-09-18 | 2008-03-26 | 上海电动工具研究所 | Programmable controller digital-control type cycle voltage falling emulation generator |
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