CN210573318U - Signal transmission circuit and electrical equipment - Google Patents
Signal transmission circuit and electrical equipment Download PDFInfo
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- CN210573318U CN210573318U CN201921916393.5U CN201921916393U CN210573318U CN 210573318 U CN210573318 U CN 210573318U CN 201921916393 U CN201921916393 U CN 201921916393U CN 210573318 U CN210573318 U CN 210573318U
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Abstract
The utility model discloses a signal transmission circuit and electrical equipment, wherein signal transmission circuit includes at least: the first switch circuit is provided with an input end connected with a first control signal, and is switched on or switched off under the action of the first control signal; and the second switch circuit is provided with two input ends, one input end is connected with the output end of the first switch circuit, the other input end is connected with a second control signal, and the second switch circuit is switched on or switched off under the action of the second control signal. Adopt the utility model discloses a signal transmission circuit makes one of them control signal when breaking down always effective, if want to make the gas valve be in the off-state this moment, then can make it be in the invalid state through controlling another one controllable control signal, and then makes the disconnection of signal transmission circuit, and the gas valve is in the off-state.
Description
Technical Field
The utility model relates to the technical field of household appliances, concretely relates to signal transmission circuit and electrical equipment.
Background
In the prior art, a valve control circuit of a conventional gas heating water heater adopts a control signal to control a gas valve, so that when a fault occurs and the control signal is in an effective state all the time, the gas valve is in a valve opening state all the time, and potential safety hazards are generated.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art when control signal breaks down always effectively, the gas valve is in the defect of the open valve state always to a signal transmission circuit and electrical equipment are provided.
According to a first aspect, an embodiment of the present invention provides a signal transmission circuit, including at least:
the first switch circuit is provided with an input end connected with a first control signal, and the first switch circuit is switched on or switched off under the action of the first control signal;
and the second switch circuit is provided with two input ends, one input end is connected with the output end of the first switch circuit, the other input end is connected with a second control signal, and the second switch circuit is switched on or switched off under the action of the second control signal.
In the signal transmission circuit provided by the embodiment of the present invention, when the first control signal is valid, the first switch circuit is in the on state; when the second control signal is active, the second switch circuit is in an on state. When the first switch circuit and the second switch circuit are simultaneously effective, the output signal of the first switch circuit can be transmitted through the second switch circuit, and the signal transmission circuit is in a switch-on state. When the first control signal is invalid but the second control signal is valid, the first switch circuit is in an off state due to the invalidity of the first control signal, and the output signal cannot be generated. When the first control signal is valid but the second control signal is invalid, the second switch circuit is in an off state at the moment, and although the first switch circuit can output signals, the signal transmission circuit is also in an off state at the moment because the second switch circuit is in the off state and can not transmit the output signals of the first switch circuit. Meanwhile, it can be understood that when both the first control signal and the second control signal are inactive, the signal transmission circuit is also in the off state. It can be seen that the signal transmission circuit is in the off state when any one of the first control signal and the second control signal is inactive. Adopt the utility model discloses a signal transmission circuit makes one of them control signal when breaking down always effective, if want to make the gas valve be in the off-state this moment, then can make it be in the invalid state through controlling another one controllable control signal, and then makes the disconnection of signal transmission circuit, and the gas valve is in the off-state.
With reference to the first aspect, in a first implementation manner of the first aspect, the signal transmission circuit further includes at least one third switch circuit, where the third switch circuit has two input terminals, one of the input terminals is connected to the output terminal of the previous switch circuit, and the other input terminal is connected to a control signal corresponding to the third switch circuit, and the third switch circuit is turned on or off by the control signal corresponding to the third switch circuit.
With reference to the first aspect or the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the first switch circuit or/and the second switch circuit or/and the third switch circuit includes:
the first electronic switch is provided with a control end and an output end, and the control end of the first electronic switch is connected with the control signal receiving end of the switch circuit;
and the control end of the second electronic switch is connected with the output end of the first electronic switch, and the output end of the second electronic switch is the output end of the switching circuit.
With reference to the second embodiment of the first aspect, in a third embodiment of the first aspect, the first electronic switch or/and the second electronic switch is a triode.
With reference to the third implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the first electronic switch is an NPN transistor, and the second electronic switch is a PNP transistor.
With reference to the second embodiment of the first aspect, in a fifth embodiment of the first aspect, the current limiter further includes a first current limiting element and a second current limiting element:
the first current limiting element is arranged between a control signal receiving end of the switch circuit and a control end of the first electronic switch;
the second current limiting element is arranged between the output end of the first electronic switch and the control end of the second electronic switch.
With reference to the fifth embodiment of the first aspect, in the sixth embodiment of the first aspect, the first current limiting element or/and the second current limiting element is/are a current limiting resistor.
With reference to the second implementation manner of the first aspect, in a seventh implementation manner of the first aspect, the apparatus further includes a pull-up resistor, and the pull-up resistor is connected in parallel with the second electronic switch.
According to a second aspect, the embodiment of the present invention further provides an electrical apparatus, including:
a controller for generating a control signal;
in the signal transmission circuit according to any one of the embodiments of the first aspect and the first aspect, an input end of each switch circuit in the signal transmission circuit is connected to the controller;
and the control circuit is connected with the output end of the last switching circuit of the signal transmission circuit.
With reference to the second aspect, in the first embodiment of the second aspect, the number of control signals generated by the controller is the same as the number of switching circuits in the signal transmission circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a signal transmission circuit according to embodiment 1 of the present invention;
fig. 2 is a schematic circuit structure diagram of the electrical equipment in embodiment 2 of the present invention.
Description of reference numerals:
1. a first switching circuit; 2. a second switching circuit; 11. an input terminal of a first switching circuit; 12. an output terminal of the first switching circuit; 21. an input terminal of the second switching circuit; 22. the other input end of the second switch circuit; 23. an output terminal of the second switching circuit; 3. a control circuit.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the module or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The signal transmission circuit shown in fig. 1 at least comprises a first switch circuit 1, having an input terminal 11 connected with a first control signal, wherein the first switch circuit 1 is switched on or off under the action of the first control signal; and a second switch circuit 2 having two input terminals, wherein one input terminal 22 is connected to the output terminal 12 of the first switch circuit, and the other input terminal 21 is connected to a second control signal, and the second switch circuit 2 is switched on or off by the second control signal.
In the signal transmission circuit provided by the embodiment of the present invention, when the first control signal is valid, the first switch circuit is in the on state; when the second control signal is active, the second switch circuit is in an on state. When the first switch circuit and the second switch circuit are simultaneously effective, the output signal of the first switch circuit can be transmitted through the second switch circuit, and the signal transmission circuit is in a switch-on state. When the first control signal is invalid but the second control signal is valid, the first switch circuit is in an off state due to the invalidity of the first control signal, and the output signal cannot be generated. When the first control signal is valid but the second control signal is invalid, the second switch circuit is in an off state at the moment, and although the first switch circuit can output signals, the signal transmission circuit is also in an off state at the moment because the second switch circuit is in the off state and can not transmit the output signals of the first switch circuit. Meanwhile, it can be understood that when both the first control signal and the second control signal are inactive, the signal transmission circuit is also in the off state. It can be seen that the signal transmission circuit is in the off state when any one of the first control signal and the second control signal is inactive. Adopt the utility model discloses a signal transmission circuit makes one of them control signal when breaking down always effective, if want to make the gas valve be in the off-state this moment, then can make it be in the invalid state through controlling another one controllable control signal, and then makes the disconnection of signal transmission circuit, and the gas valve is in the off-state.
As a specific implementation manner, the signal transmission circuit of embodiment 1 of the present invention includes only the first switch circuit 1 and the second switch circuit 2.
As a specific implementation, in addition to the first switch circuit 1 and the second switch circuit 2, the signal transmission circuit in embodiment 1 of the present invention further includes at least one third switch circuit having two input terminals, one of the input terminals is connected to the output terminal of the previous switch circuit, and the other input terminal is connected to a control signal corresponding to the third switch circuit, and the third switch circuit is turned on or off by the control signal corresponding to the third switch circuit. It can be seen that, in embodiment 1 of the present invention, the third switch circuit has the same structure as the second switch circuit, and is different in that the input terminal receives a different signal. As a specific embodiment, the second switch circuit and the third switch circuit may have the same structure.
Illustratively, two third switch circuits are included in addition to the first switch circuit 1 and the second switch circuit 2. The first third switch circuit has two input ends, one of the input ends is connected with the output end of the second switch circuit, the other input end is connected with a third control signal, and the first third switch circuit is switched on or switched off under the action of the third control signal. The second third switching circuit has two input terminals, one of which is connected to the output terminal of the first third switching circuit, and the other of which is connected to the fourth control signal, and is turned on or off by the fourth control signal. It can be seen that, in embodiment 1 of the present invention, if there are a plurality of third switching circuits, the plurality of third switching circuits perform the same function, but differ in that the input terminal receives a different signal. As a specific embodiment, the plurality of third switch circuits may have the same structure.
It can be understood that, when the signal transmission circuit according to embodiment 1 of the present invention further includes at least one third switch circuit in addition to the first switch circuit 1 and the second switch circuit 2, the opening and closing of the gas valve can be controlled by multiple control signals (the number of the control signals is the same as that of the switch circuits), so as to ensure that the gas valve can be closed by controlling the controllable signals even if some of the control signals are out of control.
As a specific implementation, the first switch circuit or/and the second switch circuit or/and the third switch circuit includes: the first electronic switch is provided with a control end and an output end, and the control end of the first electronic switch is connected with a control signal receiving end of the switch circuit; and the control end of the second electronic switch is connected with the output end of the first electronic switch, and the output end of the second electronic switch is the output end of the switching circuit.
In a more specific embodiment, the first electronic switch or/and the second electronic switch may be a transistor.
Example 2
Fig. 2 is a schematic circuit structure diagram of the electrical equipment in embodiment 2 of the present invention. Meanwhile, fig. 2 shows a specific implementation manner of the signal transmission circuit.
As shown in fig. 2, the first switch circuit and the second switch circuit of the signal transmission circuit adopt the same configuration. Illustratively, as shown in fig. 2, the signal transmission circuit includes a first switching circuit and a second switching circuit. The PNP triode Q6, the resistor R91, the resistor R92, the NPN triode Q8 and the resistor R95 form a first switch circuit; the PNP transistor Q7, the resistor R93, the resistor R94, the NPN transistor Q9, and the resistor R96 form a second switch circuit.
In the first switch circuit, Q8 is a first electronic switch and Q6 is a second electronic switch. The base of Q8 is connected to the first control signal MCU _ SWITCH1, the emitter is grounded, and the collector is connected to the base of Q6. The base of Q8 corresponds to the control terminal and the collector corresponds to the output terminal. The base of Q6 is connected to the collector of Q8, the emitter is connected to the power supply, and the collector is the output of the first switch circuit. The base of Q6 corresponds to the control terminal and the collector corresponds to the output terminal. In the first SWITCH circuit, the input terminal of the first control signal MCU _ SWITCH1 is the base of Q8.
In the second switching circuit, Q9 is a first electronic switch and Q7 is a second electronic switch. The base of Q9 is connected to the second control signal MCU _ SWITCH2, the emitter is grounded, and the collector is connected to the base of Q7. The base of Q9 corresponds to the control terminal and the collector corresponds to the output terminal. The base of Q7 is connected with the collector of Q9; the emitter is connected with the output end of the first switch circuit, namely the collector of the Q6; the collector of Q7 serves as the output of the second switching circuit. The base of Q7 corresponds to the control terminal and the collector corresponds to the output terminal. In the second switch circuit, two input ends are provided, wherein one input end is an emitter of Q7 and is connected with an output end of the first switch circuit, namely a collector of Q6; the other input end is the base of Q9 and is connected with a second control signal MCU _ SWITCH 2.
Further, as shown in fig. 2, in the signal transmission circuit shown in fig. 2, a pull-up resistor R91 connected in parallel with Q6 is further provided in the first switch circuit; a pull-up resistor R93 is also provided in parallel with Q7 in the second switch circuit.
Further, in the signal transmission circuit shown in fig. 2, in the first SWITCH circuit, a current limiting resistor R95 is further provided between Q8 and the receiving end of the first control signal MCU _ SWITCH1, and a current limiting resistor R92 is further provided between the base of Q6 and the collector of Q8. In the second SWITCH circuit, a current limiting resistor R96 is further provided between Q9 and the receiving end of the second control signal MCU _ SWITCH2, and a current limiting resistor R94 is further provided between the base of Q7 and the collector of Q9.
In the gas valve shown in fig. 2, a controller (not shown in fig. 2) and a control circuit 3 are included in addition to the signal transmission circuit. The controller is used for generating control signals MCU _ SWITCH1 and MCU _ SWITCH 2. The control circuit 3 is connected to the output terminal of the second switching circuit of the signal transmission circuit, i.e., the collector of Q7. The other end of the control circuit 3 is grounded. As a specific embodiment, the control circuit 3 may be a gas valve control circuit. The gas valve control circuit can control the opening and closing of the gas valve.
In embodiment 2 of the present invention, one controller may generate the control signals MCU _ SWITCH1 and MCU _ SWITCH2 at the same time; the MCU _ SWITCH1 may be generated by one controller and the MCU _ SWITCH2 may be generated by another controller. When there is only one controller in the gas valve, the number of control signals generated by the controller needs to be the same as the number of switching circuits in the signal transmission circuit.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A signal transmission circuit, comprising at least:
a first switch circuit (1) having an input terminal (11) connected to a first control signal, said first switch circuit (1) being switched on or off by said first control signal;
and the second switch circuit (2) is provided with two input ends, one input end (22) is connected with the output end (12) of the first switch circuit (1), the other input end (21) is connected with a second control signal, and the second switch circuit (2) is switched on or switched off under the action of the second control signal.
2. The signal transmission circuit according to claim 1, further comprising at least a third switching circuit having two input terminals, one of which is connected to an output terminal of a previous switching circuit and the other of which is connected to a control signal corresponding to the third switching circuit, the third switching circuit being turned on or off by the control signal corresponding to the third switching circuit.
3. The signal transmission circuit according to claim 1 or 2, wherein the first switch circuit or/and the second switch circuit or/and the third switch circuit comprises:
the first electronic switch is provided with a control end and an output end, and the control end of the first electronic switch is connected with a control signal receiving end of the switch circuit;
and the control end of the second electronic switch is connected with the output end of the first electronic switch, and the output end of the second electronic switch is the output end of the switching circuit.
4. The signal transmission circuit of claim 3, wherein the first electronic switch or/and the second electronic switch is a triode.
5. The signal transmission circuit of claim 4, wherein the first electronic switch is an NPN transistor and the second electronic switch is a PNP transistor.
6. The signal transmission circuit of claim 3, further comprising a first current limiting element and a second current limiting element:
the first current limiting element is arranged between a control signal receiving end of the switch circuit and a control end of the first electronic switch;
the second current limiting element is arranged between the output end of the first electronic switch and the control end of the second electronic switch.
7. The signal transmission circuit of claim 6, wherein the first current limiting element or/and the second current limiting element is/are a current limiting resistor.
8. The signal transmission circuit of claim 3, further comprising a pull-up resistor connected in parallel with the second electronic switch.
9. An electrical device, comprising:
a controller for generating a control signal;
the signal transmission circuit according to any one of claims 1 to 8, wherein an input terminal of each switch circuit in the signal transmission circuit is connected to the controller;
and the control circuit (3) is connected with the output end of the last switching circuit of the signal transmission circuit.
10. The electrical apparatus of claim 9, wherein the controller generates the same number of control signals as the number of switching circuits in the signal transmission circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921916393.5U CN210573318U (en) | 2019-11-07 | 2019-11-07 | Signal transmission circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921916393.5U CN210573318U (en) | 2019-11-07 | 2019-11-07 | Signal transmission circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210573318U true CN210573318U (en) | 2020-05-19 |
Family
ID=70660442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921916393.5U Active CN210573318U (en) | 2019-11-07 | 2019-11-07 | Signal transmission circuit and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210573318U (en) |
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2019
- 2019-11-07 CN CN201921916393.5U patent/CN210573318U/en active Active
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