CN112947170A - Double-fan control circuit and air conditioner - Google Patents
Double-fan control circuit and air conditioner Download PDFInfo
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- CN112947170A CN112947170A CN202110145806.XA CN202110145806A CN112947170A CN 112947170 A CN112947170 A CN 112947170A CN 202110145806 A CN202110145806 A CN 202110145806A CN 112947170 A CN112947170 A CN 112947170A
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- 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
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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
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Abstract
The invention provides a double-fan control circuit and an air conditioner, and relates to the technical field of air conditioners. The double fan control circuit includes: the control chip is provided with a selection end and a receiving end, one end of the selection unit is connected with the selection end, the selection unit is respectively and electrically connected with the selection end, a first feedback end of the first fan and a second feedback end of the second fan, and the conduction unit is respectively and electrically connected with the receiving end, the first feedback end of the first fan and the second feedback end of the second fan; when the selection end outputs different control signals, the receiving end can receive different feedback signals, when the selection end outputs a first control signal, the receiving end receives a first feedback signal of the first fan, and when the selection end outputs a second control signal, the receiving end receives a second feedback signal of the second fan, so that the first feedback signal of the first fan and the second feedback signal of the second fan can be controlled and received by one receiving end, and the waste of chip resources is reduced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a double-fan control circuit and an air conditioner.
Background
The double-fan control mode is widely applied to the air conditioner, the first fan and the second fan need to be respectively sent with driving signals, and feedback signals of the first fan and the second fan need to be received to realize control over the first fan and the second fan. The dual-fan control circuit provided by the invention can receive the feedback signals of the first fan and the second fan through the same receiving end, so that the waste of chip resources is reduced.
Disclosure of Invention
The invention solves the problem of reducing the waste of chip resources.
In order to solve the problems, the invention provides a double-fan control circuit and an air conditioner.
In a first aspect, an embodiment of the present invention provides a dual fan control circuit, configured to control a first fan and a second fan, where the dual fan control circuit includes: the control chip is provided with a selection end and a receiving end, one end of the selection unit is connected with the selection end, the selection unit is respectively and electrically connected with the selection end, a first feedback end of the first fan and a second feedback end of the second fan, and the conduction unit is respectively and electrically connected with the receiving end, the first feedback end of the first fan and the second feedback end of the second fan;
under the state that the selection end outputs a first control signal, the selection unit outputs a first conduction signal to enable the first feedback end to be conducted with the conduction unit, the second feedback end is cut off with the conduction unit, and the receiving end receives the first feedback signal of the first fan output by the conduction unit;
and under the condition that the selection end outputs a second control signal, the selection unit outputs a second conduction signal to enable the second feedback end to be conducted with the conduction unit, the first feedback end is cut off from the conduction unit, and the receiving end receives the second feedback signal of the second fan output by the conduction unit.
In the embodiment of the invention, when the selection end outputs different control signals, the receiving end can receive different feedback signals, when the selection end outputs a first control signal, the receiving end receives a first feedback signal of the first fan, and when the selection end outputs a second control signal, the receiving end receives a second feedback signal of the second fan, so that the first feedback signal of the first fan and the second feedback signal of the second fan can be controlled and received by one receiving end, and the waste of chip resources is reduced.
In an alternative embodiment of the present invention, the selection unit includes a first switch and a second switch, the first switch is connected in series between the selection terminal and the first feedback terminal, and the second switch is connected in series between the selection terminal and the second feedback terminal;
when the selection end outputs a first control signal, the first switch is turned off, the second switch is turned on, so that the first feedback end is turned on with the conducting unit, and the second feedback end is turned off with the conducting unit;
and when the selection end outputs a second control signal, the second switch is switched off, the first switch is switched on, so that the second feedback end is switched on with the switching-on unit, and the first feedback end is switched off with the switching-on unit.
In an optional embodiment of the present invention, the first switch is an optocoupler switch, an anode of a light emitting diode of the first switch is electrically connected to a driving power supply, a cathode of the light emitting diode of the first switch is electrically connected to the selection terminal, a collector of a light receiving transistor of the first switch is electrically connected to the first feedback terminal, and an emitter of the light receiving transistor of the first switch is grounded.
In an optional embodiment of the present invention, the second switch is an optocoupler switch, an anode of a light emitting diode of the second switch is electrically connected to the selection terminal, a cathode of the light emitting diode of the second switch is grounded, a collector of a light receiving triode of the second switch is electrically connected to the second feedback terminal, and an emitter of the light receiving triode of the second switch is grounded.
In an optional embodiment of the present invention, the conducting unit includes a trigger switch and a conducting switch connected in series, the trigger switch is electrically connected to the first feedback end and the second feedback end, and the conducting switch is electrically connected to the receiving end;
under the state that the selection end outputs a first control signal, a first feedback signal output by the first feedback end triggers the trigger switch to be conducted, and the trigger switch triggers the conduction switch to be conducted, so that the receiving end receives an electric signal, wherein the electric signal is the first feedback signal;
and under the state that the selection end outputs a second control signal, a second feedback signal output by the second feedback end triggers the trigger switch to be conducted, and the trigger switch triggers the conduction switch to be conducted, so that the receiving end receives an electric signal, wherein the electric signal is the second feedback signal.
In an optional embodiment of the present invention, the trigger switch is a triode, a collector of the trigger switch is electrically connected to the conducting switch, an emitter of the trigger switch is grounded, and a base of the trigger switch is electrically connected to the first feedback end and the second feedback end.
In an optional embodiment of the present invention, the conducting switch is an optocoupler switch, a cathode of the light emitting diode of the conducting switch is electrically connected to the trigger switch, an anode of the light emitting diode of the conducting switch is electrically connected to a conducting power supply, a collector of the light receiving transistor of the conducting switch is electrically connected to a driving power supply, and an emitter of the light receiving transistor of the conducting switch is electrically connected to the receiving terminal.
In an optional embodiment of the present invention, the control chip further includes a first driving end, the dual fan control circuit further includes a first isolation switch, the first driving end is connected in series between the first driving end and a first start end of the first fan, and the first driving end is configured to send a first driving signal to turn on the first isolation switch, so that the first start end receives a first start signal output by the first isolation switch, so as to start the first fan.
In an optional embodiment of the present invention, the first isolation switch is an optocoupler switch, an anode of a light emitting diode of the first isolation switch is electrically connected to a driving power supply, a cathode of the light emitting diode of the first isolation switch is electrically connected to the first driving end, a collector of a light receiving triode of the first isolation switch is electrically connected to a conduction power supply, and an emitter of the light receiving triode of the first isolation switch is electrically connected to the first starting end of the first fan.
In an optional embodiment of the present invention, the control chip further includes a second driving end, the dual fan control circuit further includes a second isolation switch, the second driving end is connected in series between the second driving end and a second start end of the second fan, and the second driving end is configured to send a second driving signal to turn on the second isolation switch, so that the second start end receives a second start signal output by the second isolation switch, so as to start the second fan.
In an optional embodiment of the present invention, the second isolation switch is an optocoupler switch, an anode of a light emitting diode of the second isolation switch is electrically connected to a driving power supply, a cathode of the light emitting diode of the second isolation switch is electrically connected to the second driving end, a collector of a light receiving triode of the second isolation switch is electrically connected to a conduction power supply, and an emitter of the light receiving triode of the second isolation switch is electrically connected to the second starting end of the second fan.
In a second aspect, an embodiment of the present invention provides an air conditioner, where the air conditioner includes the double-fan control circuit provided in the first aspect.
Drawings
Fig. 1 is a block diagram of a dual-fan control circuit connected to a first fan and a second fan according to a first embodiment of the present invention.
Fig. 2 is a circuit diagram of a dual-fan control circuit connected to a first fan and a second fan according to a first embodiment of the present invention.
Fig. 3 is a circuit diagram of a selection unit of a dual fan control circuit according to a first embodiment of the present invention.
Fig. 4 is a circuit diagram of a conducting unit of a dual-fan control circuit according to a first embodiment of the present invention.
Fig. 5 is a circuit diagram of the connection between the first isolation switch and the first fan of the dual-fan control circuit according to the first embodiment of the present invention.
Fig. 6 is a circuit diagram of the connection between the second isolation switch and the second fan of the dual-fan control circuit according to the first embodiment of the present invention.
Description of reference numerals:
100-double fan control circuit; 110-a control chip; 112-a selection terminal; 114-a receiving end; 116-a first drive end; 118-a second drive end; 120-a selection unit; PC1 — first switch; a1 — anode of the light emitting diode of the first switch; k1 — negative pole of light emitting diode of first switch; c1 — collector of photo transistor of first switch; e1-emitter of photo transistor of the first switch; PC2 — second switch; a2 — anode of the light emitting diode of the second switch; k2 — negative pole of light emitting diode of second switch; c2 — collector of photo transistor of second switch; e2 — the emitter of the photo transistor of the second switch; 130-conducting unit; q1-trigger switch; CQ-collector of trigger switch; EQ-emitter of trigger switch; BQ-base of the trigger switch; PC 3-on switch; a3 — anode of the light emitting diode of the conducting switch; k3-negative pole of light emitting diode turning on switch; c3-collector of photo transistor of conducting switch; e3-emitter of light receiving triode of conducting switch; d1 — first diode; r1 — first resistance; r2 — second resistance; d12 — second diode; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; c11 — first capacitance; c12 — second capacitance; c13 — third capacitance; PC 4-first isolation switch; a4 — positive pole of light emitting diode of first isolating switch; k4 — negative pole of light emitting diode of first isolating switch; c4-collector of light receiving triode of first isolating switch; e4-the emitter of the photo transistor of the first isolating switch; r7 — seventh resistor; PC 5-second isolation switch; a5-the anode of the light emitting diode of the second isolating switch; k5-cathode of LED of second isolating switch; c5-collector of light receiving triode of second isolating switch; e5-the emitter of the photo transistor of the second isolator; r8 — eighth resistance; r9 — ninth resistor; r10 — tenth resistance; r11 — eleventh resistor; r12 — twelfth resistor; r13 — thirteenth resistor; r14-fourteenth resistance; r15-fifteenth resistance; r16 — sixteenth resistance; 200-a first fan; 210-a first feedback terminal; 220-a first enable terminal; 300-a second fan; 310-a second feedback terminal; 320-second enable terminal.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
First embodiment
Referring to fig. 1 and fig. 2, the present embodiment provides a dual fan control circuit 100, and the dual fan control circuit 100 provided in the present embodiment mainly controls a first fan 200 and a second fan 300 of an air conditioner, so that the first fan 200 and the second fan 300 can be simultaneously controlled, and waste of chip resources is reduced.
The dual fans are widely applied to the air conditioner, and the dual fan control method needs to respectively send driving signals to the first fan 200 and the second fan 300 and needs to receive feedback signals of the first fan 200 and the second fan 300 to control the first fan 200 and the second fan 300. The currently adopted mode is that the chip has different ports to receive the feedback signals of the first fan 200 and the second fan 300, which causes chip resource waste, and the dual fan control circuit 100 provided by the invention can receive the feedback signals of the first fan 200 and the second fan 300 through the same receiving end 114, thereby reducing chip resource waste.
In this embodiment, the dual fan control circuit 100 includes: the control device comprises a control chip 110, a selection unit 120 and a conduction unit 130, wherein the control chip 110 is provided with a selection end 112 and a receiving end 114, one end of the selection unit 120 is connected with the selection end 112, the selection unit 120 is respectively and electrically connected with the selection end 112, a first feedback end 210 of a first fan 200 and a second feedback end 310 of a second fan 300, and the conduction unit 130 is respectively and electrically connected with the receiving end 114, the first feedback end 210 of the first fan 200 and the second feedback end 310 of the second fan 300;
in a state where the selection terminal 112 outputs the first control signal, the selection unit 120 outputs the first on signal to enable the first feedback terminal 210 to be connected to the connection unit 130, the second feedback terminal 310 to be disconnected from the connection unit 130, and the receiving terminal 114 receives the first feedback signal of the first fan 200 output by the connection unit 130;
in a state where the selection terminal 112 outputs the second control signal, the selection unit 120 outputs the second on signal to turn on the second feedback terminal 310 and the turn-on unit 130, turn off the first feedback terminal 210 and the turn-on unit 130, and the receiving terminal 114 receives the second feedback signal of the second fan 300 output by the turn-on unit 130.
In this embodiment, when the selection unit 120 receives the first control signal output by the selection terminal 112, the first feedback terminal 210 is connected to the connection unit 130, the second feedback terminal 310 is disconnected from the connection unit 130, the connection unit 130 is connected under the action of the first feedback signal output by the first feedback terminal 210, and outputs the first feedback signal, so that the receiving terminal 114 receives the first feedback signal of the first fan 200. When the selection unit 120 receives the second control signal of the selection terminal 112, the second feedback terminal 310 is connected to the connection unit 130, the first feedback terminal 210 is disconnected from the connection unit 130, the connection unit 130 is connected under the action of the second feedback signal output by the second feedback terminal 310, and outputs the first feedback signal, so that the receiving terminal 114 receives the second feedback signal of the second fan 300. In this embodiment, when the selection terminal 112 outputs different control signals, the receiving terminal 114 can receive different feedback signals, when the selection terminal 112 outputs a first control signal, the receiving terminal 114 receives a first feedback signal of the first fan 200, and when the selection terminal 112 outputs a second control signal, the receiving terminal 114 receives a second feedback signal of the second fan 300, so that the receiving of the first feedback signal of the first fan 200 and the second feedback signal of the second fan 300 by one receiving terminal 114 may be controlled, and waste of chip resources is reduced.
Referring to fig. 2 and 3, in the present embodiment, the selection unit 120 includes a first switch PC1 and a second switch PC2, the first switch PC1 is connected in series between the selection terminal 112 and the first feedback terminal 210, and the second switch PC2 is connected in series between the selection terminal 112 and the second feedback terminal 310; in a state where the selection terminal 112 outputs the first control signal, the first switch PC1 is turned off, the second switch PC2 is turned on, so that the first feedback terminal 210 and the conducting unit 130 are turned on, and the second feedback terminal 310 and the conducting unit 130 are turned off; in a state where the second control signal is output from the selection terminal 112, the second switch PC2 is turned off, the first switch PC1 is turned on, the second feedback terminal 310 and the conducting unit 130 are turned on, and the first feedback terminal 210 and the conducting unit 130 are turned off.
In this embodiment, when the selection terminal 112 outputs the first control signal, the first control signal is at a high level, so that the second switch PC2 is turned on and the first switch PC1 is turned off, after the second switch PC2 is turned on, the second feedback terminal 310 is grounded, the second feedback signal is grounded, the connection between the first feedback terminal 210 and the first switch PC1 is at a high level, the first feedback signal output by the first feedback terminal 210 flows to the conducting unit 130, so that the conducting unit 130 is turned on, and the receiving terminal 114 receives the first feedback signal of the first fan 200.
Similarly, when the second control signal is outputted from the selection terminal 112, the second control signal is at a low level, and at this time, the first switch PC1 is turned on and the second switch PC2 is turned off, the first switch PC1 is turned on to ground the first feedback terminal 210, and the first feedback signal outputted from the first feedback terminal 210 is grounded through the first switch PC 1. The connection point of the second feedback terminal 310 and the second switch PC2 is at a high level, and the second feedback signal output by the second feedback terminal 310 flows to the conducting unit 130, so that the conducting unit 130 is conducted, and the receiving terminal 114 receives the second feedback signal of the second fan 300.
It is easy to understand that when the selection terminal 112 outputs the first control signal, the receiving terminal 114 receives the first feedback signal, and when the selection terminal 112 outputs the second control signal, the receiving terminal 114 receives the second feedback signal.
In this embodiment, the first switch PC1 is an optical coupling switch, the anode a1 of the light emitting diode of the first switch is electrically connected to a driving power source, the cathode K1 of the light emitting diode of the first switch is electrically connected to the selection terminal 112, the collector C1 of the photo transistor of the first switch is electrically connected to the first feedback terminal 210, and the emitter E1 of the photo transistor of the first switch is grounded.
When the selection terminal 112 outputs the first control signal, i.e. outputs a high level, the anode a1 of the led of the first switch and the cathode K1 of the led of the first switch are both at a high level, the led of the first switch PC1 is turned off, the photo-transistor of the first switch PC1 is further turned off, and the first feedback signal output by the first feedback terminal 210 flows to the turn-on unit 130, so that the receiving terminal 114 can receive the first feedback signal.
When the selection terminal 112 outputs the second control signal, that is, outputs a low level, the cathode K1 of the led of the first switch is grounded, a potential difference exists between the anode a1 and the cathode of the led of the first switch, the led of the first switch PC1 is turned on to emit light, the light receiving transistor of the first switch PC1 is turned on after receiving the light from the led of the first switch PC1, so that the first feedback terminal 210 is grounded, and the first feedback signal output by the first feedback terminal 210 is grounded.
In this embodiment, the driving power supply is a 3.3V power supply, and the first switch PC1 can be damaged by strong current by adopting a weak current control strong current mode, so that the service life of the whole double-fan control circuit 100 is prolonged.
In this embodiment, a first resistor R1 is connected in series between the anode a1 of the led of the first switch and the driving power supply, and the first resistor R1 can protect the anode a1 of the led of the first switch, so as to prevent the voltage of the driving power supply from increasing suddenly or becoming unstable and breaking down the led of the first switch PC 1.
In this embodiment, a conduction power source is connected in parallel between the first feedback end 210 and the conduction unit 130, in other words, the first feedback end 210 is connected in parallel with the conduction power source and then electrically connected to the conduction unit 130, when the conduction unit 130 receives the first feedback signal output by the first feedback end 210, the conduction unit 130 may not be conducted due to a smaller current value of the first feedback signal, and the conduction power source can provide a partial voltage to enable the conduction unit 130 to be conducted smoothly while receiving the first feedback signal. The on power supply is also connected in series with a ninth resistor R9.
In this embodiment, a first diode D1 is further connected in series between the first feedback end 210 and the conducting unit 130, the anode of the first diode D1 is electrically connected to the first feedback end 210, the cathode of the first diode D1 is electrically connected to the conducting unit 130, and the first diode D1 can protect the first feedback end 210 when the conducting unit 130 is damaged, so as to prevent the current from flowing back to the first feedback end 210.
In this embodiment, the second switch PC2 is an optical coupling switch, the anode a2 of the light emitting diode of the second switch is electrically connected to the selection terminal 112, the cathode K2 of the light emitting diode of the second switch is grounded, the collector C2 of the light receiving transistor of the second switch is electrically connected to the second feedback terminal 310, and the emitter E2 of the light receiving transistor of the second switch is grounded.
Meanwhile, since the first control signal output by the selection terminal 112 is at a high level, a potential difference exists between two ends of the light emitting diode of the second switch PC2, the light emitting diode of the second switch PC2 is turned on, the light receiving transistor of the second switch PC2 is turned on after receiving the light emitted by the light emitting diode of the second switch PC2, so that the second feedback terminal 310 is grounded, and the second feedback signal sent by the second feedback terminal 310 is grounded.
When the selection terminal 112 outputs the second control signal, i.e. outputs a low level, both ends of the light emitting diode of the second switch PC2 are grounded, the light emitting diode of the second switch PC2 is turned off, the photo-transistor of the second switch PC2 is turned off, and the second feedback signal output by the second feedback terminal 310 flows to the conducting unit 130, so that the receiving terminal 114 receives the second feedback signal.
In this embodiment, a conducting power source is connected in parallel between the second feedback terminal 310 and the conducting unit 130, in other words, the second feedback terminal 310 is connected in parallel with the conducting power source and then electrically connected to the conducting unit 130, when the conducting unit 130 receives the second feedback signal output by the second feedback terminal 310, the conducting unit 130 may not be conducted due to a smaller current value of the second feedback signal, and the conducting power source can provide a partial voltage to enable the conducting unit 130 to be conducted smoothly while receiving the second feedback signal. The on power supply is also connected in series with a tenth resistor R10.
It is easily understood that, in the present embodiment, when the selection terminal 112 outputs the first control signal, i.e., outputs a high level, the first switch PC1 turns off the second switch PC2 to be turned on, the first feedback signal flows to the turn-on unit 130, and the second feedback signal is grounded. When the selection terminal 112 outputs the second control signal, i.e., outputs a low level, the first switch PC1 turns on the second switch PC2 and turns off, and the first feedback signal is grounded and the second feedback signal flows to the turn-on unit 130. That is, during operation, the receiving end 114 receives the first feedback signal or the second feedback signal independently, and does not receive the first feedback signal and the second feedback signal at the same time, and the receiving end 114 can receive the first feedback signal and the second feedback signal alternately through the alternate control of the first control signal and the second control signal.
A second resistor R2 is connected in series between the negative electrode K2 of the light emitting diode of the second switch and the ground, and when the selection terminal 112 outputs a high level, the second resistor R2 can generate a potential difference between the light emitting diodes of the second switch PC2, and can turn on the light emitting diode of the second switch PC 2.
Similarly, a second diode D12 is connected in series between the second feedback terminal 310 and the conducting unit 130, the anode of the second diode D12 is electrically connected to the second feedback terminal 310, and the cathode of the second diode D12 is electrically connected to the conducting unit 130, so that the second diode can protect the second feedback terminal 310 when the conducting unit 130 is damaged, and prevent the current from flowing back to the first feedback terminal 210.
Referring to fig. 2 and 4, in the present embodiment, the conducting unit 130 includes a trigger switch Q1 and a conducting switch PC3 connected in series, the trigger switch Q1 is electrically connected to the first feedback terminal 210 and the second feedback terminal 310, and the conducting switch PC3 is electrically connected to the receiving terminal 114.
Under the condition that the selection terminal 112 outputs the first control signal, the first feedback signal output by the first feedback terminal 210 triggers the trigger switch Q1 to be turned on, and the trigger switch Q1 triggers the on-switch PC3 to be turned on, so that the receiving terminal 114 receives an electrical signal, which is the first feedback signal.
Under the condition that the second control signal is output from the selection terminal 112, the second feedback signal output from the second feedback terminal 310 triggers the trigger switch Q1 to be turned on, and the trigger switch Q1 triggers the on-switch PC3 to be turned on, so that the receiving terminal 114 receives an electrical signal, which is the second feedback signal.
In this embodiment, when the trigger switch Q1 is turned on, the trigger conducting switch PC3 is turned on, so that the conducting switch PC3 outputs an electrical signal to the receiving terminal 114. When the selection terminal 112 outputs the first control signal, the electrical signal received by the receiving terminal 114 is a first feedback signal, and when the selection terminal 112 outputs the second control signal, the electrical signal received by the receiving terminal 114 is a second feedback signal.
In this embodiment, the trigger switch Q1 is a triode, the collector CQ of the trigger switch is electrically connected to the conducting switch PC3, the emitter EQ of the trigger switch is grounded, and the base BQ of the trigger switch is electrically connected to the first feedback terminal 210 and the second feedback terminal 310.
In this embodiment, when the base BQ of the trigger switch receives the first feedback signal or the second feedback signal, the collector CQ and the emitter of the trigger switch are turned on, so that the turn-on unit 130 can output an electrical signal.
In this embodiment, the conducting switch PC3 is an optocoupler switch, the negative electrode K3 of the light emitting diode of the conducting switch is electrically connected to the trigger switch Q1, the positive electrode A3 of the light emitting diode of the conducting switch is electrically connected to a conducting power supply, the collector C3 of the light receiving transistor of the conducting switch is electrically connected to a driving power supply, and the emitter E3 of the light receiving transistor of the conducting switch is electrically connected to the receiving terminal 114.
In this embodiment, the driving power is a 3.3V power, and the on power is a 15V power. The strong current and the weak point are isolated by the optical coupling switch, so that the control chip 110 is prevented from being damaged by overlarge currents of the first feedback signal and the second feedback signal.
In this embodiment, a third resistor R3 is connected in series between the anode A3 of the led of the on-switch and the power supply, and similarly, the third resistor R3 can protect the anode A3 of the led of the on-switch, so as to prevent the led from being broken down due to an excessive power supply or an unstable power supply.
And a fourth resistor R4 is connected in series between the emitter E3 of the light receiving triode of the conducting switch and the ground, and the fourth resistor R4 can protect the light emitting triode conducting the light, so that the conducting switch PC3 is prevented from being damaged due to the same potential difference between the collector and the emitter of the light emitting triode.
The emitter E3 of the light receiving transistor of the conducting switch is connected in series with the receiving terminal 114 through the fifth resistor R5, the receiving terminal 114 is connected in series with the ground through the first capacitor C11, and the fifth resistor R5 and the first capacitor C11 form a filtering unit, which can filter the electric signal received by the receiving terminal 114.
Referring to fig. 2 and fig. 5, in the present embodiment, the control chip 110 further includes a first driving end 116, the dual fan control circuit 100 further includes a first isolation switch PC4, the first isolation switch PC4 is connected in series between the first driving end 116 and the first start end 220 of the first fan 200, and the first driving end 116 is configured to send a first driving signal to turn on the first isolation switch PC4, so that the first start end 220 receives the first start signal output by the first isolation switch PC4 to start the first fan 200.
In this embodiment, the first isolating switch PC4 isolates the control chip 110 from the first fan 200, so that a short circuit caused by the common ground of the three-phase power ground and the single-phase power ground of the first fan 200 can be avoided, and the problem that the three-phase power control chip 110 cannot directly control the single-phase power first fan 200 is solved ingeniously.
In this embodiment, the first isolation switch PC4 is an optical coupler switch, the anode of the light emitting diode of the first isolation switch PC4 is electrically connected to a driving power supply, the cathode K4 of the light emitting diode of the first isolation switch is electrically connected to the first driving end 116, the collector C4 of the light receiving triode of the first isolation switch is electrically connected to a conducting power supply, and the emitter E4 of the light receiving triode of the first isolation switch is electrically connected to the first starting end 220 of the first fan 200.
When the first driving terminal 116 outputs the first driving signal, the first driving signal is at a low level, a potential difference exists between the anode a4 and the cathode of the light emitting diode of the first isolating switch, the light emitting diode is turned on, the light receiving transistor of the first isolating switch PC4 is turned on, the emitter of the light receiving transistor for isolating light outputs the first start signal, and the first fan 200 is started after receiving the first start signal.
In this embodiment, a seventh resistor R7 is connected in series between the first driving terminal 116 and the cathode K4 of the led of the first isolation switch, and the seventh resistor R7 enables a certain potential difference to exist between the anode and the cathode of the led, thereby preventing the led from being broken down.
An eleventh resistor R11 is connected between the emitter E4 of the light receiving triode of the first isolating switch and the ground in series, and the eleventh resistor R11 can protect the light emitting triode of the first isolating switch PC4 and prevent the switch PC3 from being damaged due to the same potential difference between the collector and the emitter of the light emitting triode.
A twelfth resistor R12 is connected in series between the emitter E4 of the light receiving transistor of the first isolating switch and the receiving terminal 114, a second capacitor C12 is connected in series between the receiving terminal 114 and the ground, and the twelfth resistor R12 and the second capacitor C12 form a filtering unit, which can filter the electrical signal received by the receiving terminal 114.
The twelfth resistor R12 is connected in parallel with the eleventh resistor R11, and then a thirteenth resistor R13 is connected in series between the twelfth resistor R12 and the emitter E4 of the light receiving triode of the first isolating switch.
Referring to fig. 2 and fig. 6, in the present embodiment, the control chip 110 further includes a second driving end 118, the dual fan control circuit 100 further includes a second isolation switch PC5, the second driving end 118 is connected in series between the second driving end 118 and a second start end 320 of the second fan 300, the second driving end 118 is configured to send a second driving signal to turn on the second isolation switch PC5, so that the second start end 320 receives a second start signal output by the second isolation switch PC5 to start the second fan 300.
In this embodiment, the second isolating switch PC5 isolates the control chip 110 from the second fan 300, so that a short circuit caused by the common ground of the three-phase power ground and the single-phase power ground of the second fan 300 can be avoided, and the problem that the control chip 110 of the three-phase power cannot directly control the single-phase power second fan 300 is solved ingeniously.
In this embodiment, the second isolation switch PC5 is an optical coupler switch, the anode of the light emitting diode of the second isolation switch PC5 is electrically connected to a driving power supply, the cathode K5 of the light emitting diode of the second isolation switch is electrically connected to the second driving terminal 118, the collector C5 of the light receiving triode of the second isolation switch is electrically connected to a conducting power supply, and the emitter E5 of the light receiving triode of the second isolation switch is electrically connected to the second starting terminal 320 of the second fan 300.
When the second driving terminal 118 outputs the second driving signal, the second driving signal is at a low level, a potential difference exists between the anode a5 and the cathode of the light emitting diode of the second isolating switch, the light emitting diode is turned on, the light receiving transistor of the second isolating switch PC5 is turned on, the emitter of the light receiving transistor for isolating light outputs the second start signal, and the second fan 300 is started after receiving the second start signal.
In this embodiment, an eighth resistor R8 is connected in series between the second driving terminal 118 and the cathode K5 of the led of the second isolation switch, and the eighth resistor R8 enables a certain potential difference to exist between the anode and the cathode of the led, thereby preventing the led from being broken down.
A fourteenth resistor R14 is connected in series between the emitter E5 of the light receiving triode of the second isolating switch and the ground, and the fourteenth resistor R14 can protect the light emitting triode of the second isolating switch PC5, so as to prevent the conducting switch PC3 from being damaged by the same potential difference between the collector and the emitter of the light emitting triode.
A fifteenth resistor R15 is connected in series between the emitter E5 of the light receiving transistor of the second isolation switch and the receiving terminal 114, a third capacitor C13 is connected in series between the receiving terminal 114 and the ground, and the fifteenth resistor R15 and the third capacitor C13 form a filtering unit, which can filter the electrical signal received by the receiving terminal 114.
The fourteenth resistor R14 is connected in parallel with the fifteenth resistor R15, and then a sixteenth resistor R16 is connected in series between the fourteenth resistor R14 and the emitter E5 of the light receiving triode of the second isolating switch.
In summary, in the dual fan control circuit 100 provided in this embodiment, when the selection unit 120 receives the first control signal output by the selection terminal 112, the first feedback terminal 210 is turned on with the conducting unit 130, the second feedback terminal 310 is turned off with the conducting unit 130, the conducting unit 130 is turned on under the action of the first feedback signal output by the first feedback terminal 210, and outputs the first feedback signal, so that the receiving terminal 114 receives the first feedback signal of the first fan 200. When the selection unit 120 receives the second control signal of the selection terminal 112, the second feedback terminal 310 is connected to the connection unit 130, the first feedback terminal 210 is disconnected from the connection unit 130, the connection unit 130 is connected under the action of the second feedback signal output by the second feedback terminal 310, and outputs the first feedback signal, so that the receiving terminal 114 receives the second feedback signal of the second fan 300. In this embodiment, when the selection terminal 112 outputs different control signals, the receiving terminal 114 can receive different feedback signals, when the selection terminal 112 outputs a first control signal, the receiving terminal 114 receives a first feedback signal of the first fan 200, and when the selection terminal 112 outputs a second control signal, the receiving terminal 114 receives a second feedback signal of the second fan 300, so that the receiving of the first feedback signal of the first fan 200 and the second feedback signal of the second fan 300 by one receiving terminal 114 may be controlled, and waste of chip resources is reduced.
Second embodiment
The embodiment provides an air conditioner, and the air conditioner provided by the embodiment can reduce waste of chip resources.
In this embodiment, the air conditioner includes a first fan 200, a second fan 300 and the dual fan control circuit 100 provided in the first embodiment.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A dual fan control circuit for controlling a first fan (200) and a second fan (300), the dual fan control circuit (100) comprising: the fan control system comprises a control chip (110), a selection unit (120) and a conduction unit (130), wherein the control chip (110) is provided with a selection end (112) and a receiving end (114), one end of the selection unit (120) is connected with the selection end (112), the selection unit (120) is respectively and electrically connected with the selection end (112), a first feedback end (210) of a first fan (200) and a second feedback end (310) of a second fan (300), and the conduction unit (130) is respectively and electrically connected with the receiving end (114), the first feedback end (210) of the first fan (200) and the second feedback end (310) of the second fan (300);
under the condition that the selection end (112) outputs a first control signal, the selection unit (120) outputs a first conduction signal to enable the first feedback end (210) to be conducted with the conduction unit (130), the second feedback end (310) is cut off from the conduction unit (130), and the receiving end (114) receives the first feedback signal of the first fan (200) output by the conduction unit (130);
in a state that the selection terminal (112) outputs a second control signal, the selection unit (120) outputs a second on signal to enable the second feedback terminal (310) to be connected with the connection unit (130), the first feedback terminal (210) is disconnected with the connection unit (130), and the receiving terminal (114) receives the second feedback signal of the second fan (300) output by the connection unit (130).
2. The twin fan control circuit of claim 1, wherein the selection unit (120) comprises a first switch (PC1) and a second switch (PC2), the first switch (PC1) being connected in series between the selection terminal (112) and the first feedback terminal (210), the second switch (PC2) being connected in series between the selection terminal (112) and the second feedback terminal (310);
in a state where the selection terminal (112) outputs a first control signal, the first switch (PC1) is turned off, the second switch (PC2) is turned on, the first feedback terminal (210) and the turn-on unit (130) are turned on, and the second feedback terminal (310) and the turn-on unit (130) are turned off;
in a state where the selection terminal (112) outputs a second control signal, the second switch (PC2) is turned off, the first switch (PC1) is turned on, the second feedback terminal (310) and the turn-on unit (130) are turned on, and the first feedback terminal (210) and the turn-on unit (130) are turned off.
3. The twin fan control circuit as claimed in claim 2, wherein the first switch (PC1) is a photo-coupler switch, the anode (a1) of the light emitting diode of the first switch is electrically connected to a driving power source, the cathode (K1) of the light emitting diode of the first switch is electrically connected to the selection terminal (112), the collector (C1) of the photo transistor of the first switch is electrically connected to the first feedback terminal (210), and the emitter (E1) of the photo transistor of the first switch is grounded.
4. The twin fan control circuit as claimed in claim 2, wherein the second switch (PC2) is an optocoupler switch, the anode of the light emitting diode of the second switch (PC2) is electrically connected to the selection terminal (112), the cathode (K2) of the light emitting diode of the second switch is grounded, the collector (C2) of the photo transistor of the second switch is electrically connected to the second feedback terminal (310), and the emitter (E2) of the photo transistor of the second switch is grounded.
5. The twin fan control circuit of claim 1, wherein the conducting unit (130) comprises a trigger switch (Q1) and a conducting switch (PC3) connected in series, the trigger switch (Q1) is electrically connected to the first feedback terminal (210) and the second feedback terminal (310), and the conducting switch (PC3) is electrically connected to the receiving terminal (114);
under the condition that the selection terminal (112) outputs a first control signal, a first feedback signal output by the first feedback terminal (210) triggers the trigger switch (Q1) to be turned on, the trigger switch (Q1) triggers the turn-on switch (PC3) to be turned on, so that the receiving terminal (114) receives an electric signal, wherein the electric signal is the first feedback signal;
under the condition that the selection terminal (112) outputs a second control signal, the second feedback signal output by the second feedback terminal (310) triggers the trigger switch (Q1) to be turned on, the trigger switch (Q1) triggers the on-switch (PC3) to be turned on, so that the receiving terminal (114) receives an electrical signal, wherein the electrical signal is the second feedback signal.
6. The twin fan control circuit as recited in claim 5 wherein the trigger switch (Q1) is a triode, the Collector (CQ) of the trigger switch is electrically connected to the conducting switch (PC3), the Emitter (EQ) of the trigger switch is grounded, and the Base (BQ) of the trigger switch is electrically connected to the first feedback terminal (210) and the second feedback terminal (310).
7. The dual fan control circuit according to claim 5, wherein the conducting switch (PC3) is an optocoupler switch, a cathode (K3) of the light emitting diode of the conducting switch is electrically connected to the trigger switch (Q1), an anode (A3) of the light emitting diode of the conducting switch is electrically connected to a conducting power supply, a collector (C3) of the light receiving transistor of the conducting switch is electrically connected to a driving power supply, and an emitter (E3) of the light receiving transistor of the conducting switch is electrically connected to the receiving terminal (114).
8. The dual fan control circuit according to claim 1, wherein the control chip (110) further includes a first driving terminal (116), the dual fan control circuit (100) further includes a first isolation switch (PC4), the first isolation switch (PC4) is connected in series between the first driving terminal (116) and a first start terminal (220) of the first fan (200), and the first driving terminal (116) is configured to send a first driving signal to turn on the first isolation switch (PC4) so that the first start terminal (220) receives the first start signal output by the first isolation switch (PC4) to start the first fan (200).
9. The dual fan control circuit according to claim 8, wherein the first isolation switch (PC4) is an optical coupler switch, an anode of the light emitting diode of the first isolation switch (PC4) is electrically connected to a driving power supply, a cathode (K4) of the light emitting diode of the first isolation switch is electrically connected to the first driving terminal (116), a collector (C4) of the light receiving transistor of the first isolation switch is electrically connected to a conducting power supply, and an emitter (E4) of the light receiving transistor of the first isolation switch is electrically connected to the first starting terminal (220) of the first fan (200).
10. The dual fan control circuit according to claim 1, wherein the control chip (110) further includes a second driving terminal (118), the dual fan control circuit (100) further includes a second isolation switch (PC5), the second isolation switch (PC5) is connected in series between the second driving terminal (118) and a second start terminal (320) of the second fan (300), and the second driving terminal (118) is configured to send a second driving signal to turn on the second isolation switch (PC5) so that the second start terminal (320) receives a second start signal output by the second isolation switch (PC5) to start the second fan (300).
11. The twin fan control circuit as claimed in claim 10, wherein the second isolation switch (PC5) is an optocoupler switch, the anode of the light emitting diode of the second isolation switch (PC5) is electrically connected to a driving power supply, the cathode (K5) of the light emitting diode of the second isolation switch is electrically connected to the second driving terminal (118), the collector (C5) of the light receiving transistor of the second isolation switch is electrically connected to a conducting power supply, and the emitter (E5) of the light receiving transistor of the second isolation switch is electrically connected to the second starting terminal (320) of the second fan (300).
12. An air conditioner, characterized in that it comprises a double fan control circuit (100) according to any of claims 1-11.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201583822U (en) * | 2009-11-27 | 2010-09-15 | 成都前锋电子电器集团股份有限公司 | Single-path PWM bivalve time-sharing-driving control circuit |
| US20120212251A1 (en) * | 2009-11-05 | 2012-08-23 | Rohm Co., Ltd. | Signal transmission circuit device, semiconductor device, method and apparatus for inspecting semiconductor device, signal transmission device, and motor drive apparatus using signal transmission device |
| CN103375887A (en) * | 2012-04-18 | 2013-10-30 | 珠海格力电器股份有限公司 | Control circuit and control method of air conditioner and air conditioner |
| CN205173019U (en) * | 2015-10-19 | 2016-04-20 | 珠海格力电器股份有限公司 | Centralized double-fan control system |
| CN107367985A (en) * | 2017-07-27 | 2017-11-21 | 安徽工程大学 | A kind of Multichannel Real-time Data Acguisition System |
| US20180245813A1 (en) * | 2017-02-27 | 2018-08-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Air conditioner control method and device |
| CN208419110U (en) * | 2018-04-19 | 2019-01-22 | 奥克斯空调股份有限公司 | A kind of communicating circuit and air conditioner of multi-split air conditioner |
| CN109253103A (en) * | 2018-09-13 | 2019-01-22 | 奥克斯空调股份有限公司 | A kind of fan drive circuit, fan drive device and air conditioner |
| CN208846638U (en) * | 2018-09-27 | 2019-05-10 | 奥克斯空调股份有限公司 | A kind of communication control circuit and air conditioner |
| CN208849699U (en) * | 2018-09-19 | 2019-05-10 | 宁波奥克斯电气股份有限公司 | A kind of bi-motor feedback control circuit, motor control assembly and air conditioner |
| CN209313811U (en) * | 2019-03-01 | 2019-08-27 | 奥克斯空调股份有限公司 | A kind of switching control and air conditioner |
| US20190305689A1 (en) * | 2016-07-01 | 2019-10-03 | Rohm Co., Ltd. | Semiconductor device |
-
2021
- 2021-02-02 CN CN202110145806.XA patent/CN112947170B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120212251A1 (en) * | 2009-11-05 | 2012-08-23 | Rohm Co., Ltd. | Signal transmission circuit device, semiconductor device, method and apparatus for inspecting semiconductor device, signal transmission device, and motor drive apparatus using signal transmission device |
| CN201583822U (en) * | 2009-11-27 | 2010-09-15 | 成都前锋电子电器集团股份有限公司 | Single-path PWM bivalve time-sharing-driving control circuit |
| CN103375887A (en) * | 2012-04-18 | 2013-10-30 | 珠海格力电器股份有限公司 | Control circuit and control method of air conditioner and air conditioner |
| CN205173019U (en) * | 2015-10-19 | 2016-04-20 | 珠海格力电器股份有限公司 | Centralized double-fan control system |
| US20190305689A1 (en) * | 2016-07-01 | 2019-10-03 | Rohm Co., Ltd. | Semiconductor device |
| US20180245813A1 (en) * | 2017-02-27 | 2018-08-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Air conditioner control method and device |
| CN107367985A (en) * | 2017-07-27 | 2017-11-21 | 安徽工程大学 | A kind of Multichannel Real-time Data Acguisition System |
| CN208419110U (en) * | 2018-04-19 | 2019-01-22 | 奥克斯空调股份有限公司 | A kind of communicating circuit and air conditioner of multi-split air conditioner |
| CN109253103A (en) * | 2018-09-13 | 2019-01-22 | 奥克斯空调股份有限公司 | A kind of fan drive circuit, fan drive device and air conditioner |
| CN208849699U (en) * | 2018-09-19 | 2019-05-10 | 宁波奥克斯电气股份有限公司 | A kind of bi-motor feedback control circuit, motor control assembly and air conditioner |
| CN208846638U (en) * | 2018-09-27 | 2019-05-10 | 奥克斯空调股份有限公司 | A kind of communication control circuit and air conditioner |
| CN209313811U (en) * | 2019-03-01 | 2019-08-27 | 奥克斯空调股份有限公司 | A kind of switching control and air conditioner |
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