A fan controller circuit

Abstract

The present invention discloses a fan controller circuit, comprising an MCU control chip and a key / display circuit respectively connected to the MCU control chip, at least one linkage input circuit, a fire linkage circuit, a relay output circuit, a fire sound and alarm circuit, and a voltage and current monitoring circuit. The fan controller circuit also includes a working power supply circuit, which is electrically connected to the MCU control chip, the key / display circuit, each of the linkage input circuits, the fire linkage circuit, the relay output circuit, the fire sound and alarm circuit, and the voltage and current monitoring circuit, and provides operating voltage for each circuit in the fan controller circuit. The present invention has strong anti-interference capability, improves the operating stability of the fan controller, and reduces the probability of damage to the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuits, and in particular to a fan controller circuit. Background Art

[0002] Fans are common products on the market, primarily used for ventilation and temperature regulation. Fan controllers control the fan's operating status, such as starting and stopping the fan and controlling its output power. However, existing fan controllers have limited functionality and are unable to monitor the fan's operating status, such as operating current and voltage, or issue prompt alarms when the fan is operating abnormally. Furthermore, existing fan controllers have simple internal circuit structures and poor anti-interference capabilities, resulting in poor operating stability and increasing the probability of damage to the fan during operation. Summary of the Invention

[0003] The object of the present invention is to provide a fan controller circuit to solve the above technical problems.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] Provided is a fan controller circuit, encapsulated in a fan controller, for controlling and detecting the working status of the fan. The fan controller circuit includes an MCU control chip and a key / display circuit respectively connected to the MCU control chip, at least one linkage input circuit, a fire linkage circuit, a relay output circuit, a fire sound and alarm sound circuit, and a voltage and current monitoring circuit.

[0006] The fan controller circuit also includes a working power supply circuit, which is electrically connected to the MCU control chip, the button / display circuit, each linkage input circuit, the fire linkage circuit, the relay output circuit, the fire sound and alarm sound circuit and the voltage and current monitoring circuit to provide working voltage for each circuit in the fan controller circuit.

[0007] As a preferred solution of the present invention, the model of the MCU control chip is STC8A8K64S4A12_LQFP64.

[0008] As a preferred solution of the present invention, the key / display circuit includes a first control chip and a key circuit and a display circuit connected to the first control chip.

[0009] The key circuit includes a plurality of key combinations, each of which includes a physical key and a diode. One end of the physical keys in each key combination is connected to each other, and the other end of the physical keys in each key combination is individually connected to any one of the fifth to twelfth pins of the first control chip via a reverse diode.

[0010] The display circuit includes a digital tube, wherein the eleventh pin of the digital tube is connected to the fifth pin of the first control chip; the seventh pin of the digital tube is connected to the sixth pin of the first control chip; the fourth pin of the digital tube is connected to the seventh pin of the first control chip; the second pin of the digital tube is connected to the eighth pin of the first control chip; the first pin of the digital tube is connected to the ninth pin of the first control chip; the tenth pin of the digital tube is connected to the tenth pin of the first control chip; the fifth pin of the digital tube is connected to the eleventh pin of the first control chip; the third pin of the digital tube is connected to the twelfth pin of the first control chip; the twelfth pin of the digital tube is connected to the twenty-fourth pin of the first control chip; the ninth pin of the digital tube is connected to the twenty-third pin of the first control chip; the eighth pin of the digital tube is connected to the twenty-second pin of the first control chip; and the sixth pin of the digital tube is connected to the twenty-first pin of the first control chip.

[0011] The display circuit also includes at least one light-emitting diode circuit, which includes multiple light-emitting diodes, and the cathodes of each of the light-emitting diodes are connected to the nineteenth pin or the twentieth pin of the first control chip after being interconnected; the anodes of each of the light-emitting diodes are individually connected to any one of the fifth to twelfth pins of the first control chip.

[0012] As a preferred solution of the present invention, the specific model of the first control chip is TM1638.

[0013] As a preferred solution of the present invention, each of the linkage input circuits includes an optocoupler G10, a first end of the optocoupler G10 is connected to a power supply VCC, a second end of the optocoupler G10 is connected in series with a forward diode D13, a resistor R61, and a resistor R62, and then connected to the third end of the optocoupler G10, a capacitor C42 is connected between the second and third ends of the optocoupler G10, and the third end of the optocoupler G10 is grounded; the fourth end of the optocoupler G10 is connected to an RC circuit and then grounded, and the fourth end of the optocoupler G10 is separately connected to any one of the fifth to fourteenth pins of the MCU control chip.

[0014] As a preferred embodiment of the present invention, the fire linkage circuit includes an optocoupler G11, a first end of the optocoupler G11 is connected to a power supply VCC, a second end of the optocoupler G11 is connected in series with a forward diode D14, a resistor R65 and a rectifier and then grounded; a resistor R64 is connected in series between the first end XF1 and the second end XF2 of the rectifier;

[0015] A capacitor C44 is also connected between the second end of the optocoupler G11 and the third end of the optocoupler G11, and the third end of the optocoupler G11 is grounded; the fourth end of the optocoupler G11 is connected to an RC circuit and then grounded, and the fourth end of the optocoupler G11 is connected to the fourth pin of the MCU control chip.

[0016] As a preferred solution of the present invention, the relay output circuit includes a relay driver chip and a plurality of relays connected to the relay driver chip;

[0017] The first end of each relay is connected to the ninth pin of the relay driver chip;

[0018] The second end of each relay is individually connected to any one of the tenth to sixteenth pins of the relay driver chip;

[0019] The third terminal and the fourth terminal of each relay are connected to the device controlled by the relay;

[0020] Each of the first to eighth pins of the relay driver chip is individually connected to any corresponding pin of the thirty-fifth to forty-first pins of the MCU control chip.

[0021] As a preferred solution of the present invention, the model of the relay driver chip is ULN2003L.

[0022] As a preferred solution of the present invention, the fire sound and alarm sound circuit includes a music piece and a speaker, the first pin of the music piece is connected to the power supply VCC, and the second pin of the music piece is connected to the 20th pin of the MCU control chip;

[0023] The third pin of the music sheet is connected to the base of a first transistor, the collector of the first transistor is connected to the second pin of the speaker, and the first pin of the speaker is connected to the power supply VCC;

[0024] The emitter of the first transistor is connected to the collector of a second transistor, the base of the second transistor is connected in series with a resistor and then connected to the twenty-second pin or the twenty-third pin of the MCU control chip; the emitter of the second transistor is grounded.

[0025] As a preferred solution of the present invention, the voltage and current monitoring circuit includes a control circuit and a voltage detection circuit and a current detection circuit connected to the control circuit for collecting the working voltage of the wind turbine;

[0026] The control circuit includes a second control chip, the output end of the voltage detection circuit is connected to the eleventh pin of the second control chip, and the input end of the voltage detection circuit is connected to the voltage detection point of the wind turbine;

[0027] The output end of the current detection circuit is connected to the eleventh pin of the second control chip, and the input end of the current detection circuit is connected to the current detection point of the wind turbine;

[0028] The 38th pin of the second control chip is connected to the 55th pin of the MCU control chip;

[0029] The thirty-seventh pin of the second control chip is connected to the fifty-sixth pin of the MCU control chip;

[0030] The 36th pin of the second control chip is connected to the 57th pin of the MCU control chip;

[0031] The 35th pin of the second control chip is connected to the 58th pin of the MCU control chip;

[0032] The thirty-fourth pin of the second control chip is connected to a power source VCC.

[0033] As a preferred solution of the present invention, the model of the second control chip is ATT7022C.

[0034] As a preferred embodiment of the present invention, the working power supply circuit includes a first working power supply circuit and a second working power supply circuit, the first working power supply circuit includes a first step-down chip and a second step-down chip, the input terminal Vin of the first step-down chip is connected to a 24V working voltage VCC; a capacitor C1 is connected between the input terminal Vin of the first step-down chip and the ground terminal GND of the first step-down chip, an electrolytic capacitor CB1 is connected in parallel at both ends of the capacitor C1, and a common-mode inductor L2 is connected in parallel at both ends of the electrolytic capacitor CB1; the ground terminal GND of the first step-down chip is grounded;

[0035] The output terminal Vout of the first buck chip is connected in series with a forward diode D1 and then connected to the input terminal Vin of the second buck chip. Both ends of the diode D1 are connected in parallel with a diode D2 in the same direction as the diode D1.

[0036] A capacitor C2 is connected between the input terminal Vin of the second buck chip and the ground terminal GND of the second buck chip, an electrolytic capacitor CB2 is connected in parallel at both ends of the capacitor C2, and the ground terminal GND of the second buck chip is grounded;

[0037] The output terminal Vout of the second step-down chip outputs a supply voltage to power each circuit in the fan controller circuit;

[0038] An electrolytic capacitor CB3 is connected between the output terminal Vout of the second buck chip and the ground terminal GND of the second buck chip, and a capacitor C3 is connected in parallel at both ends of the electrolytic capacitor CB3.

[0039] As a preferred embodiment of the present invention, the second working power supply circuit includes a third step-down chip, wherein the seventh pin of the third step-down chip is connected to a resistor RD and then to a 24V voltage VCC, and one end of the resistor RD connected to the 24V voltage VCC is simultaneously connected in series with an electrolytic capacitor CR4 and then to ground;

[0040] The sixth pin of the third step-down chip is connected to the intersection A of the resistor RD and the electrolytic capacitor CR4;

[0041] The fifth pin of the third step-down chip is connected to the resistor RC2 and then grounded;

[0042] The second pin of the third step-down chip is connected to the first end of an inductor L1. The second end of the inductor L1 serves as the output end of the second working power supply circuit and is connected to the voltage input end of each circuit in the fan controller circuit to provide power to each circuit. The second end of the inductor L1 is connected in series with an electrolytic capacitor CR2 and then grounded. The two ends of the electrolytic capacitor CR2 are connected in parallel with a capacitor CR5.

[0043] A point B where the electrolytic capacitor CR2 intersects the second end of the inductor L1 is connected to a resistor RC1 and then to the fifth pin of the third buck chip;

[0044] The second pin of the third step-down chip is further connected to a reverse diode D3 and then grounded;

[0045] The third pin of the third step-down chip is connected to a capacitor CR1 and then grounded;

[0046] The fourth pin of the third step-down chip is grounded;

[0047] The first pin and the eighth pin of the third buck chip are short-circuited and then connected to a connection point C between the seventh pin of the third buck chip and the resistor RD.

[0048] The fan controller circuit provided by the present invention has strong anti-interference capabilities, improving the fan controller's operational stability and reducing the probability of fan damage. It also enables real-time monitoring of the fan's operating current and voltage, providing prompt alarms when the fan operates abnormally. Furthermore, the present invention utilizes multiple power supplies to provide the required rated operating voltage for each circuit in the fan controller circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0050] Figure 1 1 is a schematic diagram of the circuit structure of a key / display circuit in a fan controller circuit according to an embodiment of the present invention;

[0051] Figure 2 is a circuit structure diagram of a linkage input circuit in the fan controller circuit;

[0052] Figure 3 It is a circuit structure diagram of the fire linkage circuit in the fan controller circuit;

[0053] Figure 4 is a circuit structure diagram of the relay output circuit in the fan controller circuit;

[0054] Figure 5 It is a circuit structure diagram of the fire sound and alarm sound circuit in the fan controller circuit;

[0055] Figure 6 is a circuit structure diagram of the control circuit in the voltage and current monitoring circuit;

[0056] Figure 7 is a circuit structure diagram of a voltage detection circuit in the voltage and current monitoring circuit;

[0057] Figure 8 is a circuit structure diagram of the power detection circuit in the voltage and current monitoring circuit;

[0058] Figure 9 is a circuit structure diagram of a working power supply circuit in the fan controller circuit;

[0059] Figure 10 It is a structural diagram of the MCU controller chip. DETAILED DESCRIPTION

[0060] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0061] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0062] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0063] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0064] Please refer to Figure 8 A fan controller circuit provided by one embodiment of the present invention is encapsulated in a fan controller and is used to control and detect the operating status of the fan. The fan controller circuit includes an MCU control chip U1 and a key / display circuit respectively connected to the MCU control chip U1, at least one linkage input circuit, a fire linkage circuit, a relay output circuit, a fire sound and alarm sound circuit, and a voltage and current monitoring circuit.

[0065] The fan controller circuit also includes a working power supply circuit, which is electrically connected to the MCU control chip U1, the key / display circuit, each linkage input circuit, the fire linkage circuit, the relay output circuit, the fire sound and alarm sound circuit and the voltage and current monitoring circuit to provide working voltage for each circuit in the fan controller circuit.

[0066] The MCU control chip U1 is preferably an MCU chip of model STC8A8K64S4A12_LQFP64 produced by ST.

[0067] Figure 1 Figure 2 shows a schematic diagram of the circuit structure of the key / display circuit. Figure 1 As shown, Figure 1 Figure a in FIG is the first control chip in the key / display circuit, and the model of the first control chip is preferably TM1638. The TM1638 chip is connected to a key circuit ( Figure 1 Figure b) and display circuit ( Figure 1 Figures c, d, and e in the figure). The key / display circuit uses the TM1638 chip to detect the key and drive the digital tube (the digital tube model is preferably 5641AS) and the light-emitting diode. The TM1638 chip has strong anti-interference capabilities, which can ensure the stable operation of the key / display circuit. In addition, the TM1638 chip has a built-in RC oscillation circuit ( Figure 1 (Figure f) in the figure shows high key scanning and display refresh efficiency. The TM1638 chip also features an 8-level brightness adjustment function, which can dim the LEDs in the display circuit to meet the brightness requirements of different environments.

[0068] For details, please refer to Figure 1 In Figures a and b, the key circuit includes multiple key combinations, each key combination includes a physical key (AN1 to AN6 in Figure b) and a diode (D15 to D20 in Figure b), one end of the physical keys in each key combination is connected to each other, and the other end of the physical key in each key combination is individually connected to any one of the fifth to twelfth pins of the first control chip via a reverse diode;

[0069] Please refer to Figure 1 In Figure c, the display circuit includes a digital tube, the eleventh pin of the digital tube is connected to the fifth pin of the first control chip; the seventh pin of the digital tube is connected to the sixth pin of the first control chip; the fourth pin of the digital tube is connected to the seventh pin of the first control chip; the second pin of the digital tube is connected to the eighth pin of the first control chip; the first pin of the digital tube is connected to the ninth pin of the first control chip; the tenth pin of the digital tube is connected to the tenth pin of the first control chip; the fifth pin of the digital tube is connected to the eleventh pin of the first control chip; the third pin of the digital tube is connected to the twelfth pin of the first control chip; the twelfth pin of the digital tube is connected to the twenty-fourth pin of the first control chip; the ninth pin of the digital tube is connected to the twenty-third pin of the first control chip; the eighth pin of the digital tube is connected to the twenty-second pin of the first control chip; and the sixth pin of the digital tube is connected to the twenty-first pin of the first control chip.

[0070] Please refer to Figure 1 In Figures d and e, the display circuit also includes at least one light-emitting diode circuit (Figure d is one type of light-emitting diode circuit, and Figure e is another type of light-emitting diode circuit). The light-emitting diode circuit includes multiple light-emitting diodes, and the cathodes of each light-emitting diode are connected to the nineteenth pin or the twentieth pin of the first control chip after being connected to each other; the anode of each light-emitting diode is individually connected to any one of the fifth pin to the twelfth pin of the first control chip.

[0071] Figure 2 The circuit structure diagram of the linkage input circuit is shown in FIG. Figure 2 and Figure 10 Each linkage input circuit includes an optocoupler G10, wherein a first end G101 of the optocoupler G10 is connected to a power supply VCC, a second end G101 of the optocoupler G10 is connected in series with a forward diode D13, a resistor R61, and a resistor R62, and then connected to a third end G103 of the optocoupler G10, a capacitor C42 is connected between the second end G102 and the third end G103 of the optocoupler G10, and the third end G103 of the optocoupler G10 is grounded; a fourth end G104 of the optocoupler G10 is connected to an RC circuit and then to ground, and the fourth end G104 of the optocoupler G10 is independently connected to any one of the fifth to fourteenth pins of the MCU control chip U1.

[0072] The working principle and characteristics of the linkage input circuit are briefly described as follows:

[0073] Please refer to Figure 2 When the linkage input circuit's IN1 port is not connected, the voltage is 0V. Therefore, the optocoupler G10 is inoperative. At this time, the output voltage of the input port, that is, the fourth terminal G104 of the optocoupler G10, is 0V. When the IN1 port is connected to a 24V voltage (external linkage signal), the optocoupler G10 operates. At this time, the output voltage of the input port is the input voltage VCC of the optocoupler G10. The MCU control chip U1 determines whether an external linkage signal has been input based on the voltage of the input port.

[0074] An RC circuit is connected to input 1. The pull-down resistor R63 in the RC circuit pulls the voltage level of input 1 down to a low level when the optocoupler G10 is not working. The capacitor C43 in the RC circuit filters the output voltage of the optocoupler G10, increasing the stability of the output voltage of input 1.

[0075] The diode D13 is a 15.1V voltage stabilizing diode. The function of the voltage stabilizing diode D13 is to shield the optocoupler G10 from operating due to voltage levels below 15.1V, thereby increasing the anti-interference capability of the linkage input circuit.

[0076] Figure 3Shows the circuit structure diagram of the fire linkage circuit. Figure 3 and Figure 10 The fire linkage circuit includes an optocoupler G11, a first end G111 of the optocoupler G11 is connected to a power supply VCC, a second end G112 of the optocoupler G11 is connected in series with a forward diode D14, a resistor R65 and a rectifier, and then grounded; a resistor R64 is connected in series between the first end XF1 and the second end XF2 of the rectifier;

[0077] A capacitor C44 is also connected between the second end G112 and the third end G113 of the optocoupler G11. The third end G113 of the optocoupler G11 is grounded. The fourth end G114 of the optocoupler G11 is connected to an RC circuit and then grounded. The fourth end G114 of the optocoupler G11 is connected to the fourth pin of the MCU control chip U1.

[0078] The rectifier model is preferably MB6S.

[0079] Please refer to Figure 3 The working principle of the fire linkage circuit is briefly described as follows:

[0080] When the voltage between the first terminal XF1 and the second terminal XF2 of the rectifier is 24V (i.e., the connected fire linkage voltage is 24V), the optocoupler G11 is activated. At this time, the input11 port in the fire linkage circuit (i.e., the voltage output port of the fourth terminal G114 of the optocoupler G11) outputs a high level. When the voltage between the first terminal XF1 and the second terminal XF2 is 0V (i.e., no fire linkage voltage is connected), the optocoupler G11 does not operate. At this time, the input11 port is at a low level. The MCU control chip U1 only needs to collect the high and low levels of the input11 port to know whether there is a fire linkage signal input.

[0081] The function of the rectifier is to prevent the fan controller from malfunctioning or being damaged due to incorrect connection of the positive and negative poles of the fire linkage input.

[0082] Figure 4 Shows the circuit structure diagram of the relay output circuit. Figure 4 and Figure 10 , the relay output circuit includes a relay driver chip U5 ( Figure 4 Figure a) and multiple relays kn connected to the relay driver chip U5 ( Figure 4 Figure b) in the figure;

[0083] The first terminal kn1 of each relay kn is connected to the ninth pin of the relay driver chip U5;

[0084] The second end kn2 of each relay kn is individually connected to any one of the tenth to sixteenth pins of the relay driver chip U5;

[0085] The third terminal kn3 and the fourth terminal kn4 of each relay kn are connected to the device controlled by the relay kn;

[0086] Each of the first to eighth pins of the relay driver chip U5 is individually connected to any corresponding pin of the thirty-fifth to forty-first pins of the MCU control chip U1 .

[0087] Preferably, the model of the relay driver chip U5 is ULN2003L.

[0088] The working principle of the relay output circuit is briefly described as follows:

[0089] When the MCU control chip U1 inputs a high level to the input pin of the relay driver chip U5 (any one of U5's 1st to 8th pins), the output pin corresponding to that input pin (any one of U5's 10th to 16th pins corresponding to that input pin) outputs a low level, and the relay kn connected to that output pin is closed. Conversely, when the MCU control chip U1 outputs a low level to the input pin of the relay driver chip U5, the corresponding relay kn loses power and opens.

[0090] Figure 5 The circuit diagram of the fire alarm sound circuit is shown in Figure 2. Figure 5 and Figure 8 The fire sound and alarm sound circuit includes a music chip KD9561 and a speaker F1. The first pin of the music chip KD9561 is connected to the power supply VCC, and the second pin of the music chip KD9561 is connected to the 20th pin of the MCU control chip U1.

[0091] The third pin of the music chip KD9561 is connected to the base of a first transistor Q1 (the first transistor can be replaced by a MOS transistor, such as a MOS transistor of model J112G). The collector of the first transistor Q1 is connected to the second pin of the speaker F1. The first pin of the speaker F1 is connected to the power supply VCC.

[0092] The emitter of the first transistor Q1 is connected to the collector of a second transistor Q13 . The base of the second transistor Q13 is connected in series with a resistor and then connected to the 22nd pin or the 23rd pin of the MCU control chip U1 . The emitter of the second transistor Q13 is grounded.

[0093] KD9561 is the preferred model for music discs.

[0094] Please refer to Figure 5 and Figure 10 The working principle of the fire sound and alarm sound circuit is briefly described as follows:

[0095] When the MCU control chip U1 gives a high level to the FM1 end in the fire sound and alarm sound circuit, and at the same time the MCU control chip U1 gives a high level to the FMQ end in the fire sound and alarm sound circuit (that is, the second pin of the music piece KD9561), the speaker F1 will sound a siren, indicating that there is an abnormality in the fan operation; when the MCU control chip U1 gives a low level to the FM1 end, the speaker F1 will stop sounding the siren.

[0096] When the MCU control chip U1 gives a high level to the FM1 terminal and a low level to the FM1 terminal at the same time, the speaker F1 will emit a fire alarm sound, indicating that the fan operating temperature is too high. When the MCU control chip U1 gives a low level to the FM1 terminal, the speaker F1 stops the alarm.

[0097] The KD9561 music disc has 4 types of audio, and the MCU control chip U1 can control the music disc to make different sounds.

[0098] Figure 6 The circuit structure diagram of the control circuit in the voltage and current monitoring circuit is shown in FIG. Figure 6 and Figure 10 The voltage and current monitoring circuit includes a control circuit and a voltage detection circuit and a current detection circuit connected to the control circuit for collecting the working voltage of the fan. For the circuit structure of the voltage detection circuit, please refer to Figure 7 The voltage detection circuit can be an existing voltage transformer, so the specific circuit structure of the voltage detection circuit is not described here. For the circuit structure of the current detection circuit, please refer to Figure 8 The current detection circuit can be an existing three-phase current transformer, so the specific circuit structure of the current detection circuit is not described here.

[0099] Please refer to Figure 6 and Figure 10 The control circuit includes a second control chip U3 (preferably an ATT7022C chip), the output terminal REFO1 of the voltage detection circuit is connected to the eleventh pin of the second control chip U3, and the input terminal of the voltage detection circuit is connected to the voltage detection point of the fan;

[0100] The output terminal REFO2 of the current detection circuit is connected to the eleventh pin of the second control chip U3, and the input terminal of the current detection circuit is connected to the current detection point of the fan;

[0101] The 38th pin of the second control chip U3 is connected to the 55th pin of the MCU control chip U1;

[0102] The 37th pin of the second control chip U3 is connected to the 56th pin of the MCU control chip U1;

[0103] The 36th pin of the second control chip U3 is connected to the 57th pin of the MCU control chip U1;

[0104] The 35th pin of the second control chip U3 is connected to the 58th pin of the MCU control chip U1;

[0105] The thirty-fourth pin of the second control chip U3 is connected to a power source VCC.

[0106] The working principle of the voltage and power monitoring circuit is briefly described as follows:

[0107] The second control chip U3 detects the voltage and / or current at the fan detection point by controlling the voltage detection circuit or the current detection circuit, and sends the detected voltage / current value to the MCU control chip U1. The MCU control chip U1 analyzes whether the fan is in an abnormal condition such as overvoltage, undervoltage, overcurrent, etc. based on the received detection data.

[0108] Figure 9 The circuit diagram of the working power supply circuit is shown in FIG. Figure 9 , the working power supply circuit includes a first working power supply circuit ( Figure 9 Figure a) and the second working power supply circuit ( Figure 9 In Figure b), the first working power supply circuit includes a first buck chip DC1 (preferably LM7818) and a second buck chip DC2 (preferably LM7812). The input terminal Vin of the first buck chip DC1 is connected to the 24V working voltage VCC; a capacitor C1 is connected between the input terminal Vin of the first buck chip DC1 and the ground terminal GND of the first buck chip DC1, and an electrolytic capacitor CB1 is connected in parallel at both ends of the capacitor C1. A common-mode inductor L2 is connected in parallel at both ends of the electrolytic capacitor CB1; the ground terminal GND of the first buck chip DC1 is grounded;

[0109] The output terminal Vout of the first buck chip DC1 is connected in series with a forward diode D1 and then connected to the input terminal Vin of the second buck chip DC2. The two ends of the diode D1 are connected in parallel with a diode D2 in the same direction as the diode D1.

[0110] A capacitor C2 is connected between the input terminal Vin of the second buck chip DC2 and the ground terminal GND of the second buck chip DC2. An electrolytic capacitor CB2 is connected in parallel to both ends of the capacitor C2. The ground terminal GND of the second buck chip DC2 is grounded.

[0111] The output terminal Vout of the second step-down chip DC2 outputs a supply voltage to power various circuits in the fan controller circuit;

[0112] An electrolytic capacitor CB3 is connected between the output terminal Vout of the second buck chip DC2 and the ground terminal GND of the second buck chip DC2 , and a capacitor C3 is connected in parallel at both ends of the electrolytic capacitor CB3 .

[0113] Please refer to Figure 9 In Figure a, the working principle of the first working power supply circuit is briefly described as follows:

[0114] The 24V DC voltage input by VCC is reduced to 18V by the first step-down chip DC1 and output to the second step-down chip DC2. The second step-down chip DC2 then reduces the 18V voltage to 12V to provide working voltage for the relay kn and relay driver chip U5 in the relay output circuit.

[0115] The purpose of adding the first buck chip DC1 before the second buck chip DC2 is to reduce the voltage drop between the input terminal VIN and the output terminal Vout of the second buck chip DC2, thereby solving the problem of chip heating caused by excessive voltage drop when using only the second buck chip DC2. The function of the power-mode inductor L2 is to enhance the common-mode interference resistance of the first working power circuit.

[0116] Please refer to Figure 9 In Figure b, the second working power supply circuit includes a third step-down chip U2 (preferably MC34063). The seventh pin of the third step-down chip U2 is connected to a resistor RD and then to a 24V voltage VCC. The end of the resistor RD connected to the 24V voltage VCC is also connected in series with an electrolytic capacitor CR4 and then to ground.

[0117] The sixth pin of the third step-down chip U2 is connected to the intersection point A of the resistor RD and the electrolytic capacitor CR4;

[0118] The fifth pin of the third step-down chip U2 is connected to the resistor RC2 and then grounded;

[0119] The second pin of the third step-down chip U2 is connected to the first end of an inductor L1. The second end L11 of the inductor L1 serves as the output end of the second working power supply circuit and is connected to the voltage input end of each circuit in the fan controller circuit to provide power to each circuit. The second end L12 of the inductor L1 is connected in series with an electrolytic capacitor CR2 and then grounded. The two ends of the electrolytic capacitor CR2 are connected in parallel with a capacitor CR5.

[0120] A point B where the electrolytic capacitor CR2 intersects the second end L12 of the inductor L1 is connected to a resistor RC1 and then to the fifth pin of the third step-down chip;

[0121] The second pin of the third step-down chip U2 is also connected to a reverse diode D3 and then grounded;

[0122] The third pin of the third step-down chip U2 is connected to a capacitor CR1 and then grounded;

[0123] The fourth pin of the third step-down chip U2 is grounded;

[0124] The first pin and the eighth pin of the third buck chip U2 are short-circuited and then connected to a connection point C between the seventh pin of the third buck chip U2 and the resistor RD.

[0125] The second working power supply circuit outputs a 5V voltage, which is mainly used to power chips and circuits with a working voltage of 5V, such as the MCU control chip U1.

[0126] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting and are provided solely for ease of description.

Claims

1. A fan controller circuit, encapsulated in a fan controller, for controlling and detecting the working state of the fan, characterized in that: It includes an MCU control chip and a key / display circuit respectively connected to the MCU control chip, at least one linkage input circuit, a fire linkage circuit, a relay output circuit, a fire sound and alarm sound circuit and a voltage and current monitoring circuit. The fan controller circuit also includes a working power supply circuit, which is electrically connected to the MCU control chip, the button / display circuit, each linkage input circuit, the fire linkage circuit, the relay output circuit, the fire sound and alarm sound circuit and the voltage and current monitoring circuit to provide a working voltage for each circuit in the fan controller circuit; The fire sound and alarm sound circuit includes a music piece and a speaker, the first pin of the music piece is connected to the power supply VCC, and the second pin of the music piece is connected to the 20th pin of the MCU control chip; The third pin of the music sheet is connected to the base of a first transistor, the collector of the first transistor is connected to the second pin of the speaker, and the first pin of the speaker is connected to the power supply VCC; The emitter of the first transistor is connected to the collector of a second transistor, the base of the second transistor is connected in series with a resistor and then connected to the 22nd pin or the 23rd pin of the MCU control chip; the emitter of the second transistor is grounded; The working power supply circuit includes a first working power supply circuit and a second working power supply circuit. The first working power supply circuit includes a first buck chip and a second buck chip. The input terminal Vin of the first buck chip is connected to a 24V working voltage VCC. A capacitor C1 is connected between the input terminal Vin of the first buck chip and the ground terminal GND of the first buck chip. An electrolytic capacitor CB1 is connected in parallel at both ends of the capacitor C1. A common-mode inductor L2 is connected in parallel at both ends of the electrolytic capacitor CB1. The ground terminal GND of the first buck chip is grounded. The output terminal Vout of the first buck chip is connected in series with a forward diode D1 and then connected to the input terminal Vin of the second buck chip. Both ends of the diode D1 are connected in parallel with a diode D2 in the same direction as the diode D1. A capacitor C2 is connected between the input terminal Vin of the second buck chip and the ground terminal GND of the second buck chip, an electrolytic capacitor CB2 is connected in parallel at both ends of the capacitor C2, and the ground terminal GND of the second buck chip is grounded; The output terminal Vout of the second step-down chip outputs a supply voltage to power each circuit in the fan controller circuit; An electrolytic capacitor CB3 is connected between the output terminal Vout of the second buck chip and the ground terminal GND of the second buck chip, and a capacitor C3 is connected in parallel at both ends of the electrolytic capacitor CB3.

2. The fan controller circuit according to claim 1, characterized in that: The key / display circuit includes a first control chip and a key circuit and a display circuit connected to the first control chip. The key circuit includes a plurality of key combinations, each of which includes a physical key and a diode. One end of the physical keys in each key combination is connected to each other, and the other end of the physical keys in each key combination is individually connected to any one of the fifth to twelfth pins of the first control chip via a reverse diode. The display circuit includes a digital tube, wherein the eleventh pin of the digital tube is connected to the fifth pin of the first control chip; the seventh pin of the digital tube is connected to the sixth pin of the first control chip; the fourth pin of the digital tube is connected to the seventh pin of the first control chip; the second pin of the digital tube is connected to the eighth pin of the first control chip; the first pin of the digital tube is connected to the ninth pin of the first control chip; the tenth pin of the digital tube is connected to the tenth pin of the first control chip; the fifth pin of the digital tube is connected to the eleventh pin of the first control chip; the third pin of the digital tube is connected to the twelfth pin of the first control chip; the twelfth pin of the digital tube is connected to the twenty-fourth pin of the first control chip; the ninth pin of the digital tube is connected to the twenty-third pin of the first control chip; the eighth pin of the digital tube is connected to the twenty-second pin of the first control chip; and the sixth pin of the digital tube is connected to the twenty-first pin of the first control chip. The display circuit also includes at least one light-emitting diode circuit, which includes multiple light-emitting diodes, and the cathodes of each of the light-emitting diodes are connected to the nineteenth pin or the twentieth pin of the first control chip after being interconnected; the anodes of each of the light-emitting diodes are individually connected to any one of the fifth to twelfth pins of the first control chip.

3. The fan controller circuit according to claim 1, characterized in that: Each of the linkage input circuits includes an optocoupler G10, a first end of the optocoupler G10 is connected to a power supply VCC, a second end of the optocoupler G10 is connected in series with a forward diode D13, a resistor R61, and a resistor R62, and then connected to a third end of the optocoupler G10, a capacitor C42 is connected between the second and third ends of the optocoupler G10, and the third end of the optocoupler G10 is grounded; a fourth end of the optocoupler G10 is connected to an RC circuit and then to ground, and the fourth end of the optocoupler G10 is separately connected to any one of the fifth to fourteenth pins of the MCU control chip.

4. The fan controller circuit according to claim 1, characterized in that: The fire linkage circuit includes an optocoupler G11, a first end of which is connected to a power supply VCC, and a second end of which is connected in series with a forward diode D14, a resistor R65, and a rectifier, and then grounded; a resistor R64 is connected in series between the first end XF1 and the second end XF2 of the rectifier; A capacitor C44 is also connected between the second end of the optocoupler G11 and the third end of the optocoupler G11, and the third end of the optocoupler G11 is grounded; the fourth end of the optocoupler G11 is connected to an RC circuit and then grounded, and the fourth end of the optocoupler G11 is connected to the fourth pin of the MCU control chip.

5. The fan controller circuit according to claim 1, characterized in that: The relay output circuit includes a relay driver chip and a plurality of relays connected to the relay driver chip; The first end of each relay is connected to the ninth pin of the relay driver chip; The second end of each relay is individually connected to any one of the tenth to sixteenth pins of the relay driver chip; The third terminal and the fourth terminal of each relay are connected to the device controlled by the relay; Each of the first to eighth pins of the relay driver chip is individually connected to any corresponding pin of the thirty-fifth to forty-first pins of the MCU control chip.

6. The fan controller circuit according to claim 5, characterized in that: The model of the relay driver chip is ULN2003L.

7. The fan controller circuit according to claim 1, characterized in that: The voltage and current monitoring circuit includes a control circuit and a voltage detection circuit and a current detection circuit connected to the control circuit for collecting the working voltage of the fan; The control circuit includes a second control chip, the output end of the voltage detection circuit is connected to the eleventh pin of the second control chip, and the input end of the voltage detection circuit is connected to the voltage detection point of the wind turbine; The output end of the current detection circuit is connected to the eleventh pin of the second control chip, and the input end of the current detection circuit is connected to the current detection point of the wind turbine; The 38th pin of the second control chip is connected to the 55th pin of the MCU control chip; The thirty-seventh pin of the second control chip is connected to the fifty-sixth pin of the MCU control chip; The 36th pin of the second control chip is connected to the 57th pin of the MCU control chip; The 35th pin of the second control chip is connected to the 58th pin of the MCU control chip; The thirty-fourth pin of the second control chip is connected to a power source VCC.

8. The fan controller circuit according to claim 1, characterized in that: The second working power supply circuit includes a third step-down chip, wherein the seventh pin of the third step-down chip is connected to a resistor RD and then to a 24V voltage VCC, and one end of the resistor RD connected to the 24V voltage VCC is simultaneously connected in series with an electrolytic capacitor CR4 and then to ground; The sixth pin of the third step-down chip is connected to the intersection A of the resistor RD and the electrolytic capacitor CR4; The fifth pin of the third step-down chip is connected to the resistor RC2 and then grounded; The second pin of the third step-down chip is connected to the first end of an inductor L1. The second end of the inductor L1 serves as the output end of the second working power supply circuit and is connected to the voltage input end of each circuit in the fan controller circuit to provide power to each circuit. The second end of the inductor L1 is connected in series with an electrolytic capacitor CR2 and then grounded. The two ends of the electrolytic capacitor CR2 are connected in parallel with a capacitor CR5. A point B where the electrolytic capacitor CR2 intersects the second end of the inductor L1 is connected to a resistor RC1 and then to the fifth pin of the third buck chip; The second pin of the third step-down chip is further connected to a reverse diode D3 and then grounded; The third pin of the third step-down chip is connected to a capacitor CR1 and then grounded; The fourth pin of the third step-down chip is grounded; The first pin and the eighth pin of the third buck chip are short-circuited and then connected to a connection point C between the seventh pin of the third buck chip and the resistor RD.

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