CN117215239A - Input-output logic control circuit and fan - Google Patents

Abstract

The invention discloses an input-output logic control circuit and a fan, wherein the input-output logic control circuit comprises a multi-stage switch circuit; the switch circuit comprises a switch input end, a switch output end, a control module and a switch module; in the switching circuit of the same stage, the input end of the switching module and the control module are electrically connected with the input end of the switch; the output end of the switch module is electrically connected with the switch output end; in any two adjacent switching circuits, the switching input end of the switching circuit of the next stage is electrically connected with the switching output end of the switching circuit of the previous stage; the switch input end of the first-stage switch circuit is electrically connected with a first power supply; in the same-stage switching circuit, the control module is used for controlling the on or off of the switching module. The technical scheme of the invention realizes the priority control of a plurality of input signals by arranging the multistage switch circuit, and is beneficial to simplifying the structure of the logic control circuit.

Description

Input-output logic control circuit and fan

Technical Field

The present invention relates to the field of electronic circuits, and in particular, to an input/output logic control circuit and a fan.

Background

The input/output logic control circuit can realize conversion of input/output signals, and is generally used for industrial control, such as control of starting and stopping of a fan or a damper.

However, the conventional input/output logic control circuit can only convert a single input/output signal, and cannot realize priority control of a plurality of input signals, so that the function is single. In addition, the input/output logic control circuit capable of realizing priority control of a plurality of input signals generally needs to be provided with a micro control unit (Microcontroller Unit, MCU), and input logic identification is realized by MUC, so that corresponding control actions are output, and the structure is complex and the cost is high.

Disclosure of Invention

The invention provides an input/output logic control circuit and a fan, which are used for solving the defects in the prior art, realizing priority control of a plurality of input signals, facilitating the simplification of the structure of the logic control circuit and reducing the cost.

In a first aspect, the present invention provides an input-output logic control circuit comprising: a multi-stage switching circuit; the switch circuit comprises a switch input end, a switch output end, a control module and a switch module;

in the switching circuit of the same stage, the input end of the switching module and the control module are electrically connected with the input end of the switch; the output end of the switch module is electrically connected with the switch output end;

in any two adjacent stages of the switching circuits, the switching input end of the switching circuit of the next stage is electrically connected with the switching output end of the switching circuit of the previous stage;

the switch input end of the switch circuit of the first stage is electrically connected with a first power supply;

in the same stage of the switch circuit, the control module is used for controlling the on/off of the switch module.

Optionally, the input/output logic control circuit further includes: an output circuit; the output circuit comprises an output control end;

and the switch output end of at least the last stage of the switch circuit is electrically connected with the output control end.

Optionally, the control module includes a first control unit and a second control unit; the switch module comprises a first switch unit and a second switch unit;

in the switching circuit of the same stage, the input end of the first switching unit, the first control unit and the second control unit are electrically connected with the switch input end; the output end of the first switch unit is electrically connected with the input end of the second switch unit; the output end of the second switch unit is electrically connected with the switch output end;

in the switching circuit of the same stage, the first control unit is used for controlling the on/off of the first switching unit; the second control unit is used for controlling the on-off state of the second switch unit.

Optionally, the switching circuit further includes a first relay and a second relay; the first relay comprises a first relay coil, a first movable contact, a first normally open contact and a first normally closed contact; the second relay comprises a second relay coil, a second movable contact, a second normally open contact and a second normally closed contact;

the first control unit comprises the first relay coil and a first input switch; the first input switch and the first relay coil are connected in series between the switch input end and the grounding end;

the second control unit comprises the second relay coil and a second input switch; the second input switch and the second relay coil are connected in series between the switch input end and the grounding end;

the first switch unit comprises the first movable contact, the first normally-open contact and the first normally-closed contact; the second switch unit comprises the second movable contact, the second normally-open contact and the second normally-closed contact;

the first movable contact is electrically connected with the switch input end, the first normally-closed contact is electrically connected with the second movable contact, and the second normally-closed contact is electrically connected with the switch output end; the first normally open contact and/or the second normally open contact are/is arranged in a suspending way.

Optionally, when the input/output logic control circuit further includes the output circuit, the second normally open contact of each stage of the switch circuit is electrically connected to the output control terminal.

Optionally, the output circuit includes at least one output control unit and at least one output switch unit corresponding to at least one output control unit;

the output control unit is electrically connected with the output control end; the output switch unit is electrically connected between the second power supply and the load;

the output control unit is used for correspondingly controlling the on or off of the output switch unit.

Optionally, the output circuit includes at least one third relay corresponding to at least one of the output control units; the third relay comprises a third relay coil, at least one third movable contact and at least one third stationary contact;

the output control unit includes the third relay coil; the output switch unit comprises the third movable contact and the third stationary contact;

the third relay coil is electrically connected between the output control end and the grounding end;

one of the third movable contact and the third stationary contact is electrically connected with the second power supply, and the other is electrically connected with the load.

Optionally, the output circuit includes at least one third relay corresponding to at least one of the output control units; the third relay comprises a third relay coil, at least one third movable contact and at least one third stationary contact;

at least one of the third relays includes a directional control relay;

the direction control relay comprises two third movable contacts and four third fixed contacts; the two third movable contacts are respectively and electrically connected with two power input ends of the load; the four third stationary contacts are respectively a first forward contact, a second forward contact, a first reverse contact and a second reverse contact; the first forward contact and the first reverse contact are electrically connected with the second power supply, and the second forward contact and the second reverse contact are electrically connected with a grounding end;

when the third relay coil is electrified, the two third movable contacts are respectively connected with the first forward contact and the second forward contact; when the third relay coil is powered off, the two third movable contacts are respectively connected with the first reverse contact and the second reverse contact.

Optionally, the input/output logic control circuit further comprises a status indication module;

the state indicating module is electrically connected with at least the switch output end of the switch circuit of the last stage.

In a second aspect, the present invention also provides a fan, including: the air exhaust device, the motor, the power module and the input-output logic control circuit are arranged in the air exhaust device;

the power supply module comprises a power supply output end; the power supply output end at least comprises a first power supply output end and a second power supply output end;

the input-output logic control circuit is electrically connected between the power supply output end and the exhaust device and the motor.

According to the technical scheme, in any two adjacent switching circuits, the switching input end of a next-stage switching circuit is electrically connected with the switching output end of a previous-stage switching circuit, the switching input end of a first-stage switching circuit is electrically connected with a first power supply, in the switching circuit of the same stage, the input end of a switching module and a control module are both electrically connected with the switching input end, the output end of the switching module is electrically connected with the switching output end, and the control module controls the switching module to be conducted or disconnected, so that the control module in the previous-stage switching circuit can control a transmission path of an electric signal received by the switching input end of the previous-stage switching circuit to the switching input end of the next-stage switching circuit, the conduction priority of the previous-stage switching circuit is higher than that of the next-stage switching circuit, and when a load electrically connected with the input-output logic control circuit is controlled by a plurality of input signals is operated, the priority control of the input signals can be realized according to the priority sequence of the switching circuits of each stage; in addition, by arranging the multi-stage switch circuit, the control module in the switch circuit of the same stage controls the on or off of the switch module, which is beneficial to simplifying the structure of the logic control circuit, thereby reducing the cost of the input/output logic control circuit.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an input/output logic control circuit according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another input/output logic control circuit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an input/output logic control circuit according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fan according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic structural diagram of an input/output logic control circuit according to an embodiment of the present invention, and referring to fig. 1, an input/output logic control circuit 1 according to an embodiment of the present invention includes: a multi-stage switching circuit 10; the switching circuit 10 comprises a switching input 11, a switching output 12, a control module 13 and a switching module 14; in the switching circuit 10 of the same stage, the input end of the switching module 14 and the control module 13 are electrically connected with the switching input end 11; the output 14 of the switch module 14 is electrically connected to the switch output 12; in any adjacent two-stage switch circuit 10, a switch input end 11 of the switch circuit 10 of the next stage is electrically connected with a switch output end 12 of the switch circuit 10 of the previous stage; the switch input end 11 of the first-stage switch circuit 101 is electrically connected with a first power supply V1; in the same-stage switching circuit 10, the control module 13 is used for controlling on or off of the switching module 14.

The multi-stage switch circuit 10 may include, but is not limited to, a two-stage switch circuit, a three-stage switch circuit, a four-stage switch circuit, etc., fig. 1 only illustrates a connection manner of the two-stage switch circuit 10, and for other multi-stage switch circuits 10, the switch input terminal 11 of the next-stage switch circuit 10 may be electrically connected to the switch output terminal 12 of the previous-stage switch circuit 10. In this embodiment, the number of stages of the switch circuit 10 can be set according to the requirements of specific application, and the input/output logic control circuit 1 is specifically set with several stages of switch circuits 10 in this embodiment without limitation.

Specifically, the switch input 11 of the first stage switch circuit 101 is electrically connected to the first power supply V1, where the first power supply V1 may be, but is not limited to, a low voltage power supply, the first power supply V1 is configured to provide an electrical signal to the first stage switch circuit 101, and when the control module 13 of the first stage switch circuit 101 controls the switch module 14 thereof to be turned on, the first power supply V1 is transmitted to the switch input 11 of the second stage switch circuit 102 through the switch module 14 of the first stage switch circuit 101 to provide an electrical signal to the second stage switch circuit 102; when both the switching module 14 of the first stage switching circuit 101 and the switching module 14 of the second stage switching circuit 102 are turned on, the first power supply V1 can be sequentially transmitted to the switching output 12 of the second stage switching circuit 102 through the switching module 14 of the first stage switching circuit 101 and the switching module 14 of the second stage switching circuit 102 to provide an electrical signal to the next stage switching circuit 10 or the load electrically connected to the switching output 12 of the second stage switching circuit 102, or the like.

When the control module 13 in the first-stage switching circuit 101 controls the switch module 14 to be turned on and the control module 13 in the second-stage switching circuit 102 controls the switch module 14 to be turned off, the first power supply V1 transmits an electrical signal to the switch input end 11 of the second-stage switching circuit 102 through the switch module of the first-stage switching circuit 101, and since the switch module of the second-stage switching circuit is turned off, the electrical signal provided by the first power supply V1 cannot be transmitted to the switch output end 12 of the second-stage switching circuit 102 through the switch module 14 of the second-stage switching circuit 102, so that the electrical signal cannot be provided to the next-stage switching circuit 10 or the load electrically connected to the switch output end 12 of the second-stage switching circuit 102.

When the control module 13 in the first-stage switch circuit 101 controls the switch module 14 to be turned off, the electrical signal provided by the first power supply V1 cannot be transmitted to the switch input end 11 of the second-stage switch circuit 102 through the switch module 14 of the first-stage switch circuit 101, and no matter the control module 13 in the second-stage switch circuit 102 controls the switch module 14 to be turned on or off, the electrical signal provided by the first power supply V1 cannot be transmitted to the switch output end 12 of the second-stage switch circuit 102, so that the first-stage switch circuit 101 can control the second-stage switch circuit 102, and the conduction priority of the first-stage switch circuit 101 is greater than that of the second-stage switch circuit 102.

In this embodiment, in any two adjacent switching circuits, the switch input end of the next switching circuit is electrically connected to the switch output end of the previous switching circuit, the switch input end of the first switching circuit is electrically connected to the first power supply, in the switching circuit of the same stage, the input end and the control module of the switch module are both electrically connected to the switch input end, the output end of the switch module is electrically connected to the switch output end, and the control module controls the on or off of the switch module, so that the control module in the previous switching circuit can control the transmission path of the electric signal received by the switch input end of the previous switching circuit to the switch input end of the next switching circuit, so that the previous switching circuit can control the next switching circuit, the conduction priority of the previous switching circuit is greater than the conduction priority of the next switching circuit, and when the load electrically connected to the input/output logic control circuit is controlled by adopting a plurality of input signals, the priority control of a plurality of input signals can be realized according to the priority order of the switching circuits of each stage; in addition, by arranging the multi-stage switch circuit, the control module in the switch circuit of the same stage controls the on or off of the switch module, which is beneficial to simplifying the structure of the logic control circuit, thereby reducing the cost of the input/output logic control circuit.

Optionally, fig. 2 is a schematic structural diagram of another input/output logic control circuit according to an embodiment of the present invention, and referring to fig. 2, the input/output logic control circuit 1 further includes an output circuit 20; the output circuit 20 includes an output control terminal 21; at least the switch output 12 of the last stage of switching circuit 10 is electrically connected to an output control 21.

The output circuit 20 may also be electrically connected to a load for controlling the operating state of the load. The electrical connection between the switch output 12 and the output control 21 of the switching circuit 10 of at least the last stage is: the output control terminal 21 of the output circuit 20 is electrically connected to only the switch output terminal 12 of the last stage switch circuit 10, or the output control terminal 21 of the output circuit 20 is electrically connected to other switch circuits 10 in addition to the switch output terminal 12 of the last stage switch circuit 10, which is not particularly limited in the embodiment of the present invention.

In an exemplary embodiment, when only the switch output terminal 12 of the last stage of the switch circuit 10 is electrically connected to the output control terminal 21, only the switch module 14 of each stage of the switch circuit 10 is in a conducting state, the electric signal provided by the first power supply V1 can be transmitted to the output circuit 20 to supply power to the output circuit 20, so that the output circuit can control the running state of the load; when the switch module 14 of the certain stage of switch circuit 10 is in the off state, the electrical signal provided by the first power supply V1 cannot be transmitted to the output circuit 20, so that the output circuit cannot control the running state of the load.

In other exemplary embodiments, the output control terminal 21 may be further electrically connected to the switch output terminal of each stage of the switch circuit 10, where the control of the transmission path of the electric signal of the first power supply V1 provided to the output circuit 20 can be achieved by correspondingly controlling the switching of the running state of the switch module 14 in the control module 13 of each stage of the switch circuit 10.

Optionally, fig. 3 is a schematic structural diagram of another input/output logic control circuit according to an embodiment of the present invention, and referring to fig. 3, the control module 13 includes a first control unit 131 and a second control unit 132; the switching module 14 includes a first switching unit 141 and a second switching unit 142; in the same-stage switching circuit 10, the input terminal of the first switching unit 141, the first control unit 131 and the second control unit 132 are all electrically connected to the switching input terminal 11; the output end of the first switching unit 141 is electrically connected with the input end of the second switching unit 142; the output terminal of the second switching unit 142 is electrically connected to the switching output terminal 12; in the same-stage switching circuit 10, the first control unit 131 is configured to control on or off of the first switching unit 141; the second control unit 132 is used for controlling the on or off of the second switch unit 142.

Specifically, in the same level of switching circuit 10, the first control unit 131 is configured to control on or off of the first switching unit 141, the second control unit 132 is configured to control on or off of the second switching unit 142, and since the input end of the first switching unit 141 is electrically connected to the switch input end 11, the output end of the first switching unit 141 is electrically connected to the input end of the second switching unit 142, when the first control unit 131 controls on of the first switching unit 141, the electrical signal of the switch input end 11 can be transmitted to the second switching unit 142 through the first switching unit 141, and at this time, if the second control unit 132 controls on of the second switching unit 142, the electrical signal of the switch input end 11 can be transmitted to the switch output end 12 through the first switching unit 141 and the second switching unit 142, i.e. when the first control unit 131 controls on of the first switching unit 141, and the second control unit 132 controls on of the second switching unit 142, the electrical signal of the switch input end 11 of the switching circuit 10 can be transmitted to the switch output end 12, so that in each level of switching circuit 10, two-stage control can be implemented, such that the first control unit 131 has a higher priority than the second control unit 132.

Optionally, with continued reference to fig. 3, the switching circuit further includes a first relay 15 and a second relay 16; the first relay 15 includes a first relay coil 151, a first movable contact D1, a first normally open contact E11, and a first normally closed contact E12; the second relay 16 includes a second relay coil 161, a second movable contact D2, a second normally open contact E21, and a second normally closed contact E22; the first control unit 131 includes a first relay coil 151 and a first input switch 1311; the first input switch 1311 and the first relay coil 151 are connected in series between the switch input terminal 11 and the ground terminal; the second control unit 132 includes a second relay coil 161 and a second input switch 1321; the second input switch 1321 and the second relay coil 161 are connected in series between the switch input terminal 11 and the ground terminal; the first switching unit 141 includes a first movable contact D1, a first normally open contact E11, and a first normally closed contact E12; the second switching unit 142 includes a second movable contact D2, a second normally open contact E21, and a second normally closed contact E22; the first movable contact D1 is electrically connected with the second movable contact D2, the first normally closed contact E12 is electrically connected with the switch input end 11, and the second normally closed contact E22 is electrically connected with the switch output end 12; the first and/or second normally open contacts E11, E21 are arranged in a floating manner.

The first input switch 1311 is configured to receive a first input signal, the second input switch 1321 is configured to receive a second input signal, when the first input signal and the second input signal are electrical signals, the first input switch 1311 and the second input switch 1321 may be electrical control switches, and when the first input signal and the second input signal are manual signals, the first input switch 1311 and the second input switch 1321 may be mechanical switches.

Specifically, since the first input switch 1311 and the first relay coil 151 are connected in series between the switch input terminal 11 and the ground terminal, when the first input switch 1311 receives the first input signal, the first input switch 1311 is closed, so that a current passes through the first relay coil 151, and thus the first relay coil 151 can attract the armature of the first relay 15, so that the first movable contact D1 is in contact electrical connection with the first normally open contact E11, that is, the first switch unit 141 is electrically disconnected from the switch input terminal 11. Since the second input switch 1321 and the second relay coil 161 are connected in series between the switch input terminal 11 and the ground terminal, when the second input switch 1321 receives the second input signal, the second input switch 1321 is closed, so that the current in the second relay coil 161 passes, and thus the second relay coil 161 can attract the armature of the second relay 16, so that the second movable contact D2 is in contact electrical connection with the second normally open contact E21, that is, the second switch unit 142 is in contact electrical disconnection with the switch output terminal 12.

It is understood that the first normally open contact E11 and/or the second normally open contact E21 are/is arranged in a floating manner, that is, the first normally open contact E11 is arranged in a floating manner, or the second normally open contact E21 is arranged in a floating manner, or both the first normally open contact E11 and the second normally open contact E21 are arranged in a floating manner. When the input-output logic control circuit 1 further includes the output circuit 20, the second normally open contact E21 may also be electrically connected to the output control terminal 21.

Alternatively, as shown in fig. 3, when the input-output logic control circuit 1 further includes the output circuit 20, the second normally open contact E21 of each stage of the switch circuit is electrically connected to the output control terminal 21.

Specifically, taking the input-output logic control circuit 1 as an example, when the first input switch 1311 in the first stage switch circuit 101 is closed, a current passes through the first relay coil 151, so that the first relay coil 151 attracts the armature of the first relay 15, and thus the first movable contact D1 in the first stage switch circuit 101 is electrically connected with the first normally open contact E11, and due to the suspension arrangement of the first normally open contact E11, the first switch unit 141 is disconnected from the switch input end 11, i.e. the first switch unit 141 is disconnected from the first power supply V1, at this time, whether the second switch unit 142 of the first stage switch circuit 101 and the second switch circuit 102 are turned on or off, i.e. whether the second input switch 1321 in the first stage switch circuit 101, the first input switch 1311 in the second stage switch circuit 102 and the second input switch 1321 in the second stage switch circuit 102 receive corresponding input signals, the switch output end 12 of the second stage switch circuit 102 cannot be electrically connected with the first power supply V1.

When the first input switch 1311 in the first stage switch circuit 101 does not receive the first input signal, that is, the first input switch 1311 in the first stage switch circuit 101 is not closed, no current passes through the first relay coil 151 in the first stage switch circuit 101, the first relay 15 does not act, that is, the first movable contact D1 is kept electrically connected with the first normally-closed contact E12, and since the first normally-closed contact E12 is electrically connected with the switch input 11, the switch input 11 of the first stage switch circuit 101 is electrically connected with the first power supply V1, so that the input end of the second switch unit 142 of the first stage switch circuit 101 can be electrically connected with the first power supply V1 through the first stage switch circuit 101, at this time, if the second input switch 1321 in the first stage switch circuit 101 receives the second input signal, that is, the second input switch 1321 is closed, so that the second relay coil 161 attracts, the second movable contact D2 is electrically connected with the second normally-open contact E21, and since the second normally-open contact E21 is electrically connected with the output control end 21, the first power supply V1 can provide the electrical signal through the first power supply V1 and the first switch unit 141 can provide the electrical signal to the first power supply voltage to the control state under control of the first power supply voltage, and the output state can be controlled by the control of the first power supply voltage unit 20; at this time, no matter the second-stage switch circuit 102 is turned on or off, that is, no matter whether the first input switch 1311 in the second-stage switch circuit 102 and the second input switch 1321 in the second-stage switch circuit 102 receive corresponding input signals, the switch output 12 of the second-stage switch circuit 102 cannot be electrically connected to the first power supply V1.

In this way, when the first input switch 1311 and the second input switch 1321 in the first stage switch circuit 101 do not receive the corresponding input signals, the case that whether the first input switch 1311 and/or the second output switch in the second stage switch circuit 102 receive the corresponding input signals is similar to the case that whether the first input switch 1311 and/or the second output switch in the first stage switch circuit 101 receive the corresponding input signals is not described herein again.

Optionally, with continued reference to fig. 3, the output circuit 20 includes at least one output control unit 22, and at least one output switch unit 23 in one-to-one correspondence with the at least one output control unit 22; the output control unit 22 is electrically connected with the output control end 21; the output switch unit 23 is electrically connected between the second power supply V2 and the load; the output control unit 22 is used for correspondingly controlling the on or off of the output switch unit 23.

The second power supply V2 may include, but is not limited to, an ac power supply and/or a dc power supply, as long as a power supply corresponding to a load can be provided. In an exemplary embodiment, the second power supply V2 may be the same power supply as the first power supply V1; in another exemplary embodiment, the second power supply V2 is a different power supply than the first power supply V1.

It should be noted that fig. 3 only illustrates a case where the output circuit includes two output control units 22 and two output switch units 23 corresponding to the two output control units 22 one by one, and the configuration of the output circuit 20 is not limited, and in this embodiment, the output circuit 20 may further include one output control unit 22 and one output switch unit 23 corresponding to the output control unit 22, or the output circuit 20 may include a plurality of output control units 22 and a plurality of output switch units 23 corresponding to the plurality of output control units 22 one by one.

Specifically, taking the input-output logic control circuit 1 as an example, when the first input switch 1311 in the first stage switch circuit 101 is closed, the first relay coil 151 in the first stage switch circuit 101 attracts the armature, so that the first movable contact D1 in the first stage switch circuit 101 is electrically connected to the first normally open contact E11, and because the first normally open contact E11 is in a floating arrangement, the first switch unit 141 is disconnected from the switch input end 11, i.e. the first switch unit 141 is disconnected from the first power supply V1, at this time, whether the second switch unit 142 of the first stage switch circuit 101 and the second stage switch circuit 102 are turned on or off, i.e. whether the second input switch 1321 in the first stage switch circuit 101, the first input switch 1311 in the second stage switch circuit 102 and the second input switch 1321 in the second stage switch circuit 102 receive corresponding input signals, the switch output end 12 of the second stage switch circuit 102 cannot be electrically connected to the first power supply V1, so that the output control unit 22 cannot control the turn on or off of the output switch unit 23; accordingly, when the first input switch 1311 in the first stage switching circuit 101 is not closed, and the second input switch 1321 in the first stage switching circuit 101 is closed, no current passes through the first relay coil 151 in the first stage switching circuit 101, and the first relay 15 does not act, that is, the first movable contact D1 is kept electrically connected to the first normally-closed contact E12, the second relay coil 161 in the first stage switching circuit 101 attracts the armature, the second movable contact D2 is electrically connected to the second normally-open contact E21, and since the second normally-open contact E21 is electrically connected to the output control terminal 21, the electric signal provided by the first power supply V1 can be transmitted to the output control terminal 21 through the first switching unit 141 and the second switching unit 142, so that the output control unit 22 can correspondingly control the output switching unit 23 to be turned on.

By the above way, when the first input switch 1311 and the second input switch 1321 in the first stage switch circuit 101 do not receive the corresponding input signals, if the first input switch 1311 in the second stage switch circuit 102 receives the corresponding input signals, the first relay coil 151 in the second stage switch circuit 102 attracts the armature, the first switch unit 141 in the second stage switch circuit 102 is disconnected from the first power supply V1, and at this time, whether the second input switch 1321 in the second stage switch circuit 102 receives the corresponding input signals or not, the switch output end 12 of the second stage switch circuit 102 is not electrically connected with the first power supply V1, so that the output control unit 22 cannot control the on or off of the output switch unit 23; only when the first input switch 1311 and the second input switch 1321 in the first stage switch circuit 101 and the first input switch 1311 in the second stage switch circuit 102 do not receive the corresponding input signals, the corresponding input signals received by the second input switch 1321 in the second stage switch circuit 102 can enable the output control unit 22 to correspondingly control the output switch unit 23 to be turned on, so that the input/output logic control circuit realizes priority control of a plurality of input signals.

Optionally, with continued reference to fig. 3, the output circuit 20 includes at least one third relay 24 in one-to-one correspondence with at least one output control unit 22; the third relay 24 includes a third relay coil 241, at least one third movable contact D3, and at least one third stationary contact E3; the output control unit 22 includes a third relay coil 241; the output switch unit 23 includes a third movable contact D3 and a third stationary contact E3; the third relay coil 241 is electrically connected between the output control terminal 21 and the ground terminal; one of the third movable contact D3 and the third stationary contact E3 is electrically connected to the second power supply V2, and the other is electrically connected to the load, so that when the output control terminal 21 receives an electrical signal of the first power supply V1, the third relay coil 241 can attract the armature to control the third movable contact D3 and the third stationary contact E3 to be electrically connected, so that the second power supply V2 can supply power to the load, thereby further simplifying the structure of the input-output logic control circuit.

Optionally, with continued reference to fig. 3, the output circuit 20 includes at least one third relay 24 in one-to-one correspondence with at least one output control unit 22; the third relay 24 includes a third relay coil 241, at least one third movable contact D3, and at least one third stationary contact E3; the output control unit 22 includes a third relay coil 241; the at least one third relay 24 comprises a directional control relay; the direction control relay comprises two third movable contacts D3 and four third fixed contacts E3; the two third movable contacts D3 are electrically connected to the two power input terminals of the load 30, respectively; the four third stationary contacts E3 are a first forward contact E31, a second forward contact E32, a first reverse contact E33 and a second reverse contact E34, respectively; the first forward contact E31 and the first reverse contact E33 are electrically connected with the second power supply V2, and the second forward contact E32 and the second reverse contact E34 are electrically connected with the grounding terminal; when the third relay coil 241 is energized, the two third movable contacts D3 are connected to the first and second forward contacts E31 and E32, respectively; when the third relay coil 241 is powered off, the two third movable contacts D3 are respectively connected with the first reverse contact E33 and the second reverse contact E34, so that when the third relay coil 241 is powered on and powered off, the switching of the power supply direction of the load is realized, and the forward and reverse movement of the load 30 can be realized.

Optionally, with continued reference to fig. 3, the input-output logic control circuit 1 further includes a status indication module 40; the status indication module 40 is at least electrically connected to the switch output 12 of the last stage switch circuit 10, and illustratively, the status indication module 40 may be an indicator light, so that the status indication module 40 can indicate whether the switch output 12 of the last stage switch circuit 10 receives the electrical signal provided by the first power supply V1, thereby implementing the indication of the status of the load 30.

Based on the same inventive concept, the embodiment of the present invention further provides a fan, fig. 4 is a schematic structural diagram of the fan provided by the embodiment of the present invention, and referring to fig. 4, the fan includes an exhaust device 2, a motor 3, a power module 4, and an input/output logic control circuit 1 provided by any of the foregoing embodiments; the power module 4 comprises a power supply output end; the power supply output end at least comprises a first power supply V1 output end and a second power supply V2 output end; the input/output logic control circuit 1 is electrically connected between the output end of the power supply 4 and the exhaust device 2 and the motor 3.

The fan has the corresponding structure and characteristics of the input/output logic control circuit provided by any embodiment of the invention, can achieve the beneficial effects of the input/output logic control circuit provided by the embodiment of the invention, and the same points can be described with reference to the above.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. An input-output logic control circuit, comprising: a multi-stage switching circuit; the switch circuit comprises a switch input end, a switch output end, a control module and a switch module;

in the switching circuit of the same stage, the input end of the switching module and the control module are electrically connected with the input end of the switch; the output end of the switch module is electrically connected with the switch output end;

in any two adjacent stages of the switching circuits, the switching input end of the switching circuit of the next stage is electrically connected with the switching output end of the switching circuit of the previous stage;

the switch input end of the switch circuit of the first stage is electrically connected with a first power supply;

in the same stage of the switch circuit, the control module is used for controlling the on/off of the switch module.

2. The input-output logic control circuit of claim 1, further comprising: an output circuit; the output circuit comprises an output control end;

and the switch output end of at least the last stage of the switch circuit is electrically connected with the output control end.

3. The input-output logic control circuit according to claim 1 or 2, wherein the control module comprises a first control unit and a second control unit; the switch module comprises a first switch unit and a second switch unit;

in the switching circuit of the same stage, the input end of the first switching unit, the first control unit and the second control unit are electrically connected with the switch input end; the output end of the first switch unit is electrically connected with the input end of the second switch unit; the output end of the second switch unit is electrically connected with the switch output end;

in the switching circuit of the same stage, the first control unit is used for controlling the on/off of the first switching unit; the second control unit is used for controlling the on-off state of the second switch unit.

4. The input-output logic control circuit of claim 3, wherein the switching circuit further comprises a first relay and a second relay; the first relay comprises a first relay coil, a first movable contact, a first normally open contact and a first normally closed contact; the second relay comprises a second relay coil, a second movable contact, a second normally open contact and a second normally closed contact;

the first control unit comprises the first relay coil and a first input switch; the first input switch and the first relay coil are connected in series between the switch input end and the grounding end;

the second control unit comprises the second relay coil and a second input switch; the second input switch and the second relay coil are connected in series between the switch input end and the grounding end;

the first switch unit comprises the first movable contact, the first normally-open contact and the first normally-closed contact; the second switch unit comprises the second movable contact, the second normally-open contact and the second normally-closed contact;

the first movable contact is electrically connected with the second movable contact, the first normally-closed contact is electrically connected with the switch input end, and the second normally-closed contact is electrically connected with the switch output end; the first normally open contact and/or the second normally open contact are/is arranged in a suspending way.

5. The input-output logic control circuit of claim 4, wherein the second normally open contact of each stage of the switching circuit is electrically connected to the output control terminal when the input-output logic control circuit further comprises the output circuit.

6. The input-output logic control circuit according to claim 2, wherein the output circuit comprises at least one output control unit and at least one output switch unit in one-to-one correspondence with at least one of the output control units;

the output control unit is electrically connected with the output control end; the output switch unit is electrically connected between the second power supply and the load;

the output control unit is used for correspondingly controlling the on or off of the output switch unit.

7. The input-output logic control circuit according to claim 6, wherein the output circuit includes at least one third relay in one-to-one correspondence with at least one of the output control units; the third relay comprises a third relay coil, at least one third movable contact and at least one third stationary contact;

the output control unit includes the third relay coil; the output switch unit comprises the third movable contact and the third stationary contact;

the third relay coil is electrically connected between the output control end and the grounding end;

one of the third movable contact and the third stationary contact is electrically connected with the second power supply, and the other is electrically connected with the load.

8. The input-output logic control circuit according to claim 6, wherein the output circuit includes at least one third relay in one-to-one correspondence with at least one of the output control units; the third relay comprises a third relay coil, at least one third movable contact and at least one third stationary contact;

at least one of the third relays includes a directional control relay;

the direction control relay comprises two third movable contacts and four third fixed contacts; the two third movable contacts are respectively and electrically connected with two power input ends of the load; the four third stationary contacts are respectively a first forward contact, a second forward contact, a first reverse contact and a second reverse contact; the first forward contact and the first reverse contact are electrically connected with the second power supply, and the second forward contact and the second reverse contact are electrically connected with a grounding end;

when the third relay coil is electrified, the two third movable contacts are respectively connected with the first forward contact and the second forward contact; when the third relay coil is powered off, the two third movable contacts are respectively connected with the first reverse contact and the second reverse contact.

9. The input-output logic control circuit of claim 1, further comprising a status indication module;

the state indicating module is electrically connected with at least the switch output end of the switch circuit of the last stage.

10. A blower, comprising: an exhaust device, a motor, a power module and the input-output logic control circuit of any one of claims 1-9;

the power supply module comprises a power supply output end; the power supply output end at least comprises a first power supply output end and a second power supply output end;

the input-output logic control circuit is electrically connected between the power supply output end and the exhaust device and the motor.