CN112761999B - Double-fan control circuit and air conditioner - Google Patents
Double-fan control circuit and air conditioner Download PDFInfo
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- CN112761999B CN112761999B CN202110033953.8A CN202110033953A CN112761999B CN 112761999 B CN112761999 B CN 112761999B CN 202110033953 A CN202110033953 A CN 202110033953A CN 112761999 B CN112761999 B CN 112761999B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application provides a double-fan control circuit and an air conditioner, and relates to the technical field of air conditioners. The utility model provides a two fan control circuit utilizes an opto-coupler and a switch tube to realize the feedback signal selection of first fan, second fan, only can realize the switching of first fan with second fan feedback signal according to a fan selection signal, has alleviated current air conditioner IO port resource shortage scheduling problem, has reduced the application of opto-coupler in the system simultaneously, utilizes the switch tube to replace the opto-coupler, has reduced the system cost, has improved the reliability of system.
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
In the aspect of air conditioner control, an isolation controller mode circuit of the driving plate for controlling the double fans is complex, isolation and transmission of control signals are achieved through the multiple optical couplers, up to 5 optical couplers are used in the circuit of the whole control system, the cost is not advantageous, the optical couplers are easy to damage, and the reliability is not high.
Disclosure of Invention
The problem that this application was solved reduces the quantity of opto-coupler among the double fan control circuit, reduce cost improves system reliability.
In order to solve the above problems, the technical scheme adopted by the application is as follows:
in a first aspect, the invention provides a dual fan control circuit, which includes a driving controller, a first diode, a second diode, a first optocoupler and a first switch tube;
the driving controller comprises a fan selection end, a feedback receiving end, a first diode, a second diode, a first fan feedback end, a second fan feedback end, a first fan feedback end, a second fan feedback end and a second fan feedback end, wherein the anode of the first diode is connected with the first fan feedback end, the anode of the second diode is connected with the second fan feedback end, the driving controller comprises a fan selection end and a feedback receiving end, and the cathode of the first diode and the cathode of the second diode are both connected with the feedback receiving end;
the positive electrode of the transmitting end of the first optical coupler is connected with a first direct current power supply, the negative electrode of the transmitting end of the first optical coupler is connected with the fan selecting end of the driving controller, the emitter of the receiving end of the first optical coupler is grounded, and the collector of the receiving end of the first optical coupler is connected with the anode of the first diode;
the control end of the first switch tube is connected with the collector of the receiving end of the first optocoupler, the second end of the first switch tube is grounded, and the first end of the first switch tube is connected with the anode of the second diode;
the fan selection end is used for outputting fan selection signals, the fan selection signals comprise first fan selection signals and second fan selection signals, when the fan selection signals are the first fan selection signals, the first optocoupler is switched off, the first switch tube is switched on, the second diode is switched off, the first diode is switched on, and feedback signals output by the first fan feedback end are output to the feedback receiving end through the first diode, so that feedback control of the first fan is realized;
when the fan selection signal is the second fan selection signal, the first optocoupler is connected, the first switch tube is cut off, the first diode is disconnected, the second diode is connected, and a feedback signal output by the feedback end of the second fan is output to the feedback receiving end through the second diode, so that feedback control of the second fan is realized.
The scheme that this application provided utilizes the feedback signal switching of first opto-coupler and first switch Guan Shixian first fan and second fan, utilizes first switch tube to replace the opto-coupler, has reduced the application of opto-coupler, has reduced system cost, improves the reliability of system.
In an optional embodiment, the first fan includes a first feedback signal terminal, and an anode of the first diode and the first feedback signal terminal are connected through a first resistor.
In an alternative embodiment, a first terminal of the first resistor is connected to the first feedback signal terminal of the first fan, a second terminal of the first resistor is connected to the anode of the first diode, and a second terminal of the R65 is further connected to ground through a first capacitor.
In an optional embodiment, the second fan includes a second feedback signal terminal, and an anode of the second diode is connected to the second feedback signal terminal through a second resistor.
In an optional implementation manner, a first end of the second resistor is connected to a second feedback signal end of the second fan, a second end of the second resistor is connected to an anode of the second diode, and a second end of the second resistor is further grounded through a second capacitor.
In an optional embodiment, the first fan selection signal is in a state opposite to a level state of the second fan selection signal, the first fan selection signal is a high level signal, and the second fan selection signal is a low level signal.
In an optional embodiment, the double-fan control circuit comprises a feedback isolation module, and the feedback isolation module comprises a second switch tube and a second optical coupler;
the control end of the second switch tube is connected with the cathode of the first diode and the cathode of the second diode;
the first end of the second switch tube is connected with the cathode of the transmitting end of the second optocoupler, and the second end of the second switch tube is grounded;
the positive electrode of the transmitting end of the second optocoupler is connected with a second direct-current power supply, the collector of the receiving end of the second optocoupler is connected with a first direct-current power supply, and the emitter of the receiving end of the second optocoupler is connected with the feedback receiving end;
when a feedback signal of the first fan is transmitted to the control end of the second switch tube, the second switch tube is conducted, the second optocoupler is conducted, and the feedback receiving end detects the feedback signal of the first fan;
when the feedback signal of the second fan is transmitted to the control end of the second switch tube, the second switch tube is conducted, the second optocoupler is conducted, and the feedback receiving end detects the feedback signal of the second fan.
In an optional embodiment, a positive electrode of an emitting end of the first optocoupler and a positive electrode of an emitting end of the second optocoupler are both provided with a protection resistor.
In an optional embodiment, the second switch tube and the first switch tube each include one of a triode, a field effect transistor, or an insulated gate bipolar transistor.
In a second aspect, the present invention provides an air conditioner, including the double fan control circuit according to any one of the foregoing embodiments.
Drawings
FIG. 1 is a schematic diagram of a conventional dual-fan control circuit;
fig. 2 is a schematic diagram of a double fan control circuit provided in this embodiment.
Description of reference numerals:
d1-a first diode; d2-a second diode; PC 1-first optocoupler; PC 2-second optocoupler; q1-a first switch tube; p1-a first switching tube control end; p2-a first end of a first switch tube; p3-a second end of the first switch tube; q2-a second switching tube; p4-a second switching tube control end; p5-the first end of the second switch tube; p6-the second end of the second switch tube; r1-a first resistor; r2-a second resistor; r3-a third resistor; r4-a fourth resistor; c1-a first capacitor; c2-second capacitance.
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.
It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
In air conditioner control, an isolation controller mode circuit of a driving plate controlling a double fan is complex, and isolation and transmission of control signals are achieved by using a plurality of optocouplers, for example, please refer to fig. 1, fig. 1 shows a schematic diagram of an existing double-fan control circuit, when a fan 1 is driven and controlled, a DCFAN _ SPD _ select fan selection port outputs a high level, an optocoupler PC7 is turned off, a feedback signal of a 6 th pin of the fan 1 passes through a resistor R65, a diode D11 and a driving triode Q3 are turned on, a driving optocoupler PC6 is turned on, a DCFAN _ SPD _ CAP chip port detects a feedback signal of the fan 1, an optocoupler PC8 is turned on when the DCFAN _ SPD _ select fan selection port outputs a high level, and a feedback signal of the fan 2 flows to a DGND through a resistor R66. Thus, the feedback signal of the fan 1 can be detected, and the driving control of the fan 1 is realized.
When drive control fan 2, DCFAN _ SPD _ SELECTE fan select gate output low level, opto-coupler PC8 cuts off, fan 2 the 6 th feedback signal of foot passes through resistance R66, diode D12, drive triode Q3 switches on, drive opto-coupler PC6 switches on, DCFAN _ SPD _ CAP chip mouth detects fan 2's feedback signal, opto-coupler PC7 switches on when DCFAN _ SPD _ SELECTE fan select gate output low level, fan 1's feedback signal passes through resistance R65 flow direction DGND. In this way, a feedback signal of the fan 2 can be detected. The drive control of the fan 2 is realized. The double-fan control circuit realizes that the feedback of the double fans is obtained by only one I/O port to drive and control the double fans, but the existing double-fan control circuit uses up to 5 optocouplers in the whole control system circuit, has higher cost and no advantage in cost, and the optocouplers are easy to damage and have low reliability.
In order to solve the above problem, the present embodiment provides a novel dual fan control circuit, please refer to fig. 2, the dual fan control circuit provided in the present embodiment includes a driving controller (not shown), a first diode D1, a second diode D2, a first optocoupler PC1 and a first switch Q1, and is configured to implement feedback control on the first fan and the second fan.
The first fan comprises a first fan feedback end and is used for outputting a feedback signal of the first fan; the second fan comprises a second fan feedback end used for outputting a feedback signal of the second fan.
The positive pole of first diode D1 is used for connecting first fan feedback end, and the positive pole of second diode D2 is used for connecting second fan feedback end, and drive controller includes fan select end and feedback receiving terminal, and the negative pole of first diode D1 and the negative pole of second diode D2 all are connected with the feedback receiving terminal electricity, and in this embodiment, the negative pole of first diode D1 all is connected with the feedback receiving terminal electricity through feedback isolation module with the negative pole of second diode D2.
It can understand ground, when first diode D1 switches on, second diode D2 switches off, the feedback signal transmission of first fan to drive controller's feedback receiving terminal to can carry out feedback control to first fan, when first diode D1 switches off, second diode D2 switches on, the feedback signal transmission of second fan to drive controller's feedback receiving terminal, thereby can carry out feedback control to first fan.
The scheme that this application embodiment provided through the circuit improvement, and the triode replacement opto-coupler of ingenious use reduces the use quantity of opto-coupler, reduces system cost, improves the reliability of system simultaneously.
Referring to fig. 2, the first optocoupler PC1 includes an emitting end anode a, an emitting end cathode K, a receiving end emitter E, and a receiving end collector C, and when the level of the emitting end anode a is higher than the level of the emitting end cathode K, the light emitting diode is turned on to emit light, and the receiving end senses light to generate current, so that the receiving end emitter E is turned on with the receiving end collector C. In this embodiment, the positive electrode a of the transmitting end of the first optocoupler PC1 is connected to the first dc power supply, the negative electrode K of the transmitting end of the first optocoupler PC1 is connected to the fan selecting end of the driving controller, the emitter E of the receiving end of the first optocoupler PC1 is grounded, and the collector C of the receiving end of the first optocoupler PC1 is connected to the anode of the first diode D1.
The first switch tube Q1 includes a first switch tube control end P1, a first switch tube first end P2 and a first switch tube second end P3. The control end P1 of the first switch tube is connected with the collector C of the receiving end of the first optocoupler PC1, the second end P3 of the first switch tube is grounded, and the first end P2 of the first switch tube is connected with the anode of the second diode D2.
In an optional embodiment, the first fan includes a first feedback signal terminal, the anode of the first diode D1 is connected to the first feedback signal terminal through a first resistor R1, and the anode of the first diode D1 is further connected to the second dc power supply through a third resistor R3, so as to increase the level state.
In this embodiment, the first dc power source is a 3.3V dc power source, and the second dc power source is a 15V dc power source, but the invention is not limited thereto, and may be a dc power source with other amplitudes.
In an alternative embodiment, a first end of the first resistor R1 is connected to the first feedback signal end of the first fan, a second end of the first resistor R1 is connected to the anode of the first diode D1, and in order to reduce interference of a large current, the second end of the first resistor R1 is further grounded through the first capacitor C1.
Similarly, the second fan comprises a second feedback signal end, and the anode of the second diode D2 is connected with the second feedback signal end through the second resistor R2. The anode of the second diode D2 is also connected to the second dc power supply through a fourth resistor R4 to raise the level state.
In an alternative embodiment, the first end of the second resistor R2 is connected to the second feedback signal end of the second fan, the second end of the second resistor R2 is connected to the anode of the second diode D2, and in order to reduce interference of a large current, the second end of the second resistor R2 is further grounded through the second capacitor C2.
The fan selection end is used for outputting fan selection signals, and the fan selection signals comprise first fan selection signals and second fan selection signals. In an alternative embodiment, the first fan selection signal is opposite in level to the second fan selection signal, for example, the first fan selection signal is a high level signal, and the second fan selection signal is a low level signal.
When the fan selection signal is a first fan selection signal, namely a high-level signal, the negative electrode K of the transmitting end of the first optical coupler PC1 is at a high level, the transmitting end of the first optical coupler PC1 is not conducted, no current is generated at the receiving end of the first optical coupler PC1, and the receiving end of the first optical coupler PC1 is in a cut-off state, so that the first optical coupler PC1 is in a cut-off state. At the moment, the second direct-current power supply is connected to the first switch tube control end P1 through the third resistor R3, so that the first switch tube first end P2 is conducted with the first switch tube second end P3, under the condition, the anode of the second diode D2 is grounded through the first switch tube Q1, the level of the anode of the second diode D2 is pulled down to be in a turn-off state, the feedback signal of the second fan is grounded through the second resistor R2, and the feedback receiving end cannot receive the feedback signal of the second fan. And under the condition that first opto-coupler PC1 is the off-state, the positive pole of first diode D1 is the high level, and first diode D1 switches on, and the feedback signal of first fan feedback end output passes through first diode D1 and exports to the feedback receiving terminal, realizes the feedback control of first fan.
Similarly, when the fan selection signal is the second fan selection signal, i.e. the low level signal, the negative pole K of the transmitting terminal of the first optical coupler PC1 is at the low level, the transmitting terminal of the first optical coupler PC1 is turned on, the receiving terminal of the first optical coupler PC1 has current to generate, and is also in a turned-on state, so that the first optical coupler PC1 is in a turned-on state. At this time, the anode level of the first diode D1 is pulled down by the first optical coupler PC1, the first diode D1 is not conducted, the feedback signal of the first fan is grounded through the first resistor R1 and the first optical coupler PC1, and the feedback receiving end cannot receive the feedback signal of the first fan.
And under the condition that first opto-coupler PC1 switches on, the receiving terminal collecting electrode C of first opto-coupler PC1 is the low level, and first switch tube control end P1 is the low level promptly, and first switch tube Q1 ends this moment, and the positive pole level of second diode D2 is the high level, therefore second diode D2 switches on, and the feedback signal of second fan feedback end output is exported to the feedback receiving terminal through second diode D2, realizes the feedback control of second fan.
This application embodiment is through setting up first opto-coupler PC1 and first switch tube Q1 ingeniously, utilize first switch tube Q1 to replace the opto-coupler, realize the feedback control of first fan and second fan, only need to change the level state that fan selection end output can switch the feedback signal of first fan and second fan, the problem that chip IO mouth resource allocation is not enough often appears in the air conditioner has been improved, reduce the reliability that opto-coupler quantity can improve the system simultaneously, the system cost is reduced.
In an optional embodiment, the double-fan control circuit includes a feedback isolation module, the feedback isolation module includes a second switch tube Q2 and a second optocoupler PC2, wherein a second switch tube control end P4 is connected to a cathode of the first diode D1 and a cathode of the second diode D2, and when the first diode D1 or the second diode D2 is turned on, and the second switch tube control end P4 receives a high-level signal, the second switch tube first end P5 is turned on with the second switch tube second end P6.
In an optional implementation manner, a first end P5 of the second switch tube is connected with a cathode K of an emitting end of the second optocoupler PC2, and a second end P6 of the second switch tube is grounded; the emitting end anode A of the second optical coupler PC2 is connected with a second direct current power supply, the receiving end collector C of the second optical coupler PC2 is connected with the first direct current power supply, and the receiving end emitter E of the second optical coupler PC2 is connected with the feedback receiving end of the driving controller.
When the feedback signal of first fan transmitted to second switch tube control end P4, second switch tube control end P4 was the high level, and second switch tube Q2 switched on, and the transmitting terminal negative pole K ground connection of second opto-coupler PC2 was the low level this moment, and the transmitting terminal anodal A of second opto-coupler PC2 connects the second DC power supply and is the high level, therefore second opto-coupler PC2 switches on, and the feedback receiving terminal detects the feedback signal of first fan.
When the feedback signal transmission of second fan was to second switch tube control end P4, second switch tube control end P4 was the high level, and second switch tube Q2 switched on, and the transmitting terminal negative pole K ground connection of second opto-coupler PC2 was the low level this moment, and the transmitting terminal anodal A of second opto-coupler PC2 connects the second DC power supply and is the high level, therefore second opto-coupler PC2 switches on, and the feedback receiving terminal detects the feedback signal of first fan.
In an optional implementation mode, a transmitting end anode A of the first optical coupler PC1 and a transmitting end anode A of the second optical coupler PC2 are both provided with protective resistors, so that the situation that the optical couplers are damaged due to overhigh voltage of a direct-current power supply connected by the optical couplers is avoided.
In an optional embodiment, the first switch tube Q1 and the second switch tube Q2 each include one of a triode, a field effect transistor, or an insulated gate bipolar transistor, for example, in this embodiment, the second switch tube Q2 and the first switch tube Q1 may both use a triode, where the second switch tube control end P4 is a base, the second switch tube first end P5 is a collector, and the second switch tube second end P6 is an emitter. Similarly, when the first switch tube Q1 is a triode, the control end P1 of the first switch tube is a base, the first end P2 of the first switch tube is a collector, and the second end P3 of the first switch tube is an emitter.
The application also provides an air conditioner, which comprises a first fan, a second fan and the double-fan control circuit provided in the implementation mode.
To sum up, the application provides a double fan control circuit and air conditioner, the double fan control circuit who provides in application utilizes an opto-coupler and a switch tube to realize the feedback signal selection of first fan, second fan, only can realize the switching of first fan and second fan feedback signal according to a fan selection signal, the current air conditioner IO port resource shortage scheduling problem has been alleviated, the application of opto-coupler in the system has been reduced simultaneously, utilize the switch tube to replace the opto-coupler, the system cost is reduced, the reliability of system is improved.
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 (10)
1. A double-fan control circuit is characterized by comprising a drive controller, a first diode (D1), a second diode (D2), a first optical coupler (PC 1) and a first switch tube (Q1);
the anode of the first diode (D1) is used for being connected with a first feedback signal end, the anode of the second diode (D2) is used for being connected with a second feedback signal end, the driving controller comprises a fan selection end and a feedback receiving end, and the cathode of the first diode (D1) and the cathode of the second diode (D2) are both connected with the feedback receiving end;
the emitting end anode (A) of the first optocoupler (PC 1) is connected with a first direct current power supply, the emitting end cathode (K) of the first optocoupler (PC 1) is connected with the fan selecting end of the driving controller, the receiving end emitter (E) of the first optocoupler (PC 1) is grounded, and the receiving end collector (C) of the first optocoupler (PC 1) is connected with the anode of the first diode (D1);
a first switch tube control end (P1) is connected with a collector (C) of a receiving end of the first optocoupler (PC 1), a second end (P3) of the first switch tube is grounded, and a first end (P2) of the first switch tube is connected with an anode of the second diode (D2);
the fan selection end is used for outputting fan selection signals, the fan selection signals comprise first fan selection signals and second fan selection signals, when the fan selection signals are the first fan selection signals, the first optical coupler (PC 1) is switched off, the first switch tube (Q1) is switched on, the second diode (D2) is switched off, the first diode (D1) is switched on, and feedback signals output by the first feedback signal end are output to the feedback receiving end through the first diode (D1) to realize feedback control of the first fan;
when the fan selection signal is the second fan selection signal, the first optical coupler (PC 1) is switched on, the first switch tube (Q1) is cut off, the first diode (D1) is switched off, the second diode (D2) is switched on, and a feedback signal output by the second feedback signal end is output to the feedback receiving end through the second diode (D2), so that the feedback control of the second fan is realized.
2. The twin fan control circuit as defined in claim 1 wherein the first fan includes the first feedback signal terminal, and wherein the anode of the first diode (D1) is electrically connected to the first feedback signal terminal through a first resistor (R1).
3. The double fan control circuit according to claim 2, wherein a first terminal of the first resistor (R1) is connected to a first feedback signal terminal of the first fan, a second terminal of the first resistor (R1) is connected to an anode of the first diode (D1), and a second terminal of the first resistor (R1) is further connected to ground through a first capacitor (C1).
4. The twin fan control circuit as defined in claim 1 wherein the second fan includes the second feedback signal terminal, and the anode of the second diode (D2) is electrically connected to the second feedback signal terminal through a second resistor (R2).
5. The dual fan control circuit of claim 4, wherein a first terminal of the second resistor (R2) is connected to a second feedback signal terminal of the second fan, a second terminal of the second resistor (R2) is connected to an anode of the second diode (D2), and a second terminal of the second resistor (R2) is further connected to ground through a second capacitor (C2).
6. The dual fan control circuit of claim 1, wherein the first fan selection signal is in an opposite level state to the second fan selection signal, the first fan selection signal being a high level signal, and the second fan selection signal being a low level signal.
7. The dual fan control circuit of claim 1, wherein the dual fan control circuit comprises a feedback isolation module comprising a second switching tube (Q2), a second optocoupler (PC 2);
the control end (P4) of the second switching tube is connected with the cathode of the first diode (D1) and the cathode of the second diode (D2);
a first end (P5) of a second switch tube is connected with a cathode (K) of an emitting end of the second optocoupler (PC 2), and a second end (P6) of the second switch tube is grounded;
the emitting end anode (A) of the second optical coupler (PC 2) is connected with a second direct current power supply, the receiving end collector (C) of the second optical coupler (PC 2) is connected with a first direct current power supply, and the receiving end emitter (E) of the second optical coupler (PC 2) is connected with the feedback receiving end;
when the feedback signal of the first fan is transmitted to the control end of the second switch tube (Q2), the second switch tube (Q2) is conducted, the second optical coupler (PC 2) is conducted, and the feedback receiving end detects the feedback signal of the first fan;
when the feedback signal of the second fan is transmitted to the second switch tube control end (P4), the second switch tube (Q2) is conducted, the second optical coupler (PC 2) is conducted, and the feedback receiving end detects the feedback signal of the second fan.
8. The double-fan control circuit according to claim 7, wherein a transmitting end anode (A) of the first optical coupler (PC 1) and a transmitting end anode (A) of the second optical coupler (PC 2) are provided with protective resistors.
9. The dual fan control circuit of claim 7, wherein the second switch transistor (Q2) and the first switch transistor (Q1) each comprise one of a triode, a field effect transistor, or an insulated gate bipolar transistor.
10. An air conditioner, characterized in that the air conditioner comprises a double fan control circuit according to any one of claims 1~9.
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| 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 |
| CN205070777U (en) * | 2015-11-12 | 2016-03-02 | 温州亿科电子有限公司 | Switching power supply circuit |
| 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 |
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|---|---|
| CN112761999A (en) | 2021-05-07 |
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Effective date of registration: 20230516 Address after: 315000 No.1166 Mingguang North Road, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Address before: 519080 202, 2nd floor, building B, headquarters base, No.2 Qianwan 2nd Road, Tangjiawan Town, high tech Zone, Zhuhai City, Guangdong Province Patentee before: ZHUHAI TUOXIN TECHNOLOGY Co.,Ltd. Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. |
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