A smoke machine control system based on high-speed motor

Abstract

The utility model discloses a kind of hood control system based on high-speed motor, it is related to range hood field, the hood control system based on high-speed motor includes: power module, for introducing commercial voltage, obtains 310V direct current after rectification filtering, and obtains 15V direct current by step-down;Main control MCU module, for receiving the PWM signal of host computer, to output control signal to motor control module;Motor control module, for receiving control signal, the conduction state of six switch tubes is controlled based on control signal, to control motor operating state, and feedback current signal to main control MCU module, compared with prior art, the beneficial effects of the utility model are: the utility model motor can be placed in the position far from kitchen, so that the noise generated when kitchen is not motor running, but only some wind sound, very quiet;Motor does not directly contact with oil dirt smoke dust, convenient to clean, service life is doubled.

Description

Technical Field

[0001] This utility model relates to the field of range hoods, specifically a range hood control system based on a high-speed motor. Background Technology

[0002] Kitchen range hoods efficiently extract and exhaust fumes using high-speed centrifugal fans and intelligent wind pressure regulation technology. Top-mounted and side-mounted designs are available to suit different kitchen spaces.

[0003] In daily household life, kitchen range hoods are relatively difficult to clean and maintain, specifically due to issues such as short motor lifespan, difficulty in cleaning motor grease, and high noise levels, all of which require improvement. Utility Model Content

[0004] The purpose of this invention is to provide a smoke hood control system based on a high-speed motor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A smoke hood control system based on a high-speed motor includes:

[0007] The power module is used to introduce the mains voltage, which is rectified and filtered to obtain 310V DC power, and then stepped down to obtain 15V DC power.

[0008] The main control MCU module is used to receive PWM signals from the host computer and output control signals to the motor control module.

[0009] The motor control module receives control signals, controls the conduction state of six switching transistors based on the control signals to control the motor's operating state, and feeds back current signals to the main control MCU module, which then adjusts the control signals accordingly.

[0010] The gear control module is used to transmit electrical signals to the main control MCU module via buttons, and the main control MCU module controls whether the motor works and adjusts the motor speed when the motor is working.

[0011] The display indicator module is used to indicate the motor's operating status via LED lights;

[0012] The power module is connected to the main control MCU module and the motor control module, and the main control MCU module is connected to the motor control module, the gear control module, and the display indicator module.

[0013] The motor is installed inside the air duct. An air inlet is provided on the first side of the motor, an oil fume inlet is provided below the second side of the motor, and an oil fume outlet is provided above the second side of the motor.

[0014] As a further improvement of this utility model: the main control MCU module includes chip U1, the model of chip U1 is LCP067CC36EU8, pins 19, 27, 28, 29, 32, 35 and 38 of chip U1 are connected to the motor control module, pin 18 of chip U1 is connected to the gear control module, and pins 4, 5 and 24 of chip U1 are connected to the display indicator module.

[0015] As a further embodiment of this utility model: the motor control module includes MOSFETs M1, M2, M3, M4, M5, and M6. The drain of MOSFET M1 is connected to the drains of MOSFETs M3 and M5, and a 310V voltage. The source of MOSFET M1 is connected to the drain of MOSFET M2 and the first terminal of the three-phase common-mode inductor L3. The source of MOSFET M3 is connected to the drain of MOSFET M4 and the second terminal of the three-phase common-mode inductor L3. The source of MOSFET M5 is connected to the drain of MOSFET M6 and the third terminal of the three-phase common-mode inductor L3. The fourth, fifth, and sixth terminals of the three-phase common-mode inductor L3 are connected to the motor via interface CN2. The source of MOSFET M2 is connected to one end of resistor RS3. The source of MOSFET M4 is connected to one end of resistor RS2. The source of MOSFET M6 is connected to the other end of resistor RS3, the other end of resistor RS2, and one end of resistor RS1. The other end of resistor RS1 is grounded.

[0016] The gate of MOSFET M1 is connected to one end of resistor R12 and one end of resistor R28. The other end of resistor R12 is connected to the cathode of diode D11 and the main control MCU module. The anode of diode D11 is connected to the other end of resistor R28.

[0017] The gate of MOSFET M2 is connected to one end of resistor R16 and one end of resistor R42. The other end of resistor R16 is connected to the cathode of diode D14 and the main control MCU module. The anode of diode D14 is connected to the other end of resistor R42.

[0018] The gate of MOSFET M3 is connected to one end of resistor R19 and one end of resistor R31. The other end of resistor R19 is connected to the negative terminal of diode D12 and the main control MCU module. The positive terminal of diode D12 is connected to the other end of resistor R31.

[0019] The gate of MOSFET M4 is connected to one end of resistor R23 and one end of resistor R43. The other end of resistor R23 is connected to the cathode of diode D15 and the main control MCU module. The anode of diode D15 is connected to the other end of resistor R43.

[0020] The gate of MOSFET M5 is connected to one end of resistor R26 and one end of resistor R32. The other end of resistor R26 is connected to the cathode of diode D13 and the main control MCU module. The anode of diode D13 is connected to the other end of resistor R32.

[0021] The gate of MOSFET M6 is connected to one end of resistor R29 and one end of resistor R52. The other end of resistor R29 is connected to the negative terminal of diode D16 and the main control MCU module. The positive terminal of diode D16 is connected to the other end of resistor R52.

[0022] As a further embodiment of this utility model: the gear control module includes resistor R54, resistor R39, capacitor C22, and switch SW1. One end of resistor R54 is connected to a 5V voltage, and the other end of resistor R54 is connected to one end of resistor R39 and one end of switch SW1. The other end of switch SW1 is grounded. The other end of resistor R39 is connected to one end of capacitor C22 and the main control MCU module. The other end of capacitor C22 is grounded.

[0023] As a further embodiment of this utility model: the display indicator module includes LED1, LED2, and LED3. The positive terminal of LED1 is connected to a 5V voltage through resistor R25. The negative terminal of LED1 is connected to the collector of transistor Q2. The emitter of transistor Q2 is grounded. The base of transistor Q2 is connected to the main control MCU module through resistor R56. The positive terminal of LED2 is connected to a 5V voltage through resistor R58. The negative terminal of LED2 is connected to the collector of transistor Q3. The emitter of transistor Q3 is grounded. The base of transistor Q3 is connected to the main control MCU module through resistor R60. The positive terminal of LED3 is connected to a 5V voltage through resistor R59. The negative terminal of LED3 is connected to the collector of transistor Q4. The emitter of transistor Q4 is grounded. The base of transistor Q4 is connected to the main control MCU module through resistor R61.

[0024] As a further embodiment of this utility model: the smoke hood control system based on a high-speed motor also includes an input voltage detection module. The input voltage detection module includes resistors R38, R7, R9, and R11, capacitor C9, and diode D10. One end of resistor R38 is connected to 310V. Resistor R38 is connected in sequence through resistors R7 and R9 to one end of resistor R11, the positive terminal of diode D19, one end of capacitor C9, and the main control MCU module. The other end of resistor R11 is grounded, the other end of capacitor C9 is grounded, and the negative terminal of diode D10 is connected to 5V.

[0025] As a further improvement of this utility model: the smoke hood control system based on a high-speed motor also includes an on-board temperature detection module, which includes a resistor R51, a thermistor RT, and a capacitor C10. One end of the resistor R51 is connected to a 5V voltage, and the other end of the resistor R51 is connected to one end of the thermistor RT, one end of the capacitor C10, and the main control MCU module. The other end of the thermistor RT is grounded, and the other end of the capacitor C10 is grounded.

[0026] Compared with the prior art, the beneficial effects of this utility model are: the motor of this utility model can be placed far away from the kitchen, so that there is no noise generated by the motor running in the kitchen, only some wind noise, which is very quiet; the motor does not come into direct contact with oil and fumes, making it easy to clean and extending its service life many times over. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a smoke hood control system based on a high-speed motor.

[0028] Figure 2 This is the circuit diagram of the first part of the power supply module.

[0029] Figure 3 This is the circuit diagram for the second part of the power supply module.

[0030] Figure 4 This is the circuit diagram of the main control MCU module.

[0031] Figure 5 This is the circuit diagram of the motor control module.

[0032] Figure 6 This is the circuit diagram of the gear control module.

[0033] Figure 7 The circuit diagram is for displaying the indicator module.

[0034] Figure 8 This is the circuit diagram for the input voltage detection module.

[0035] Figure 9 This is the circuit diagram of the temperature detection module on the board.

[0036] In the diagram: 1-Air inlet, 2-Motor, 3-Air duct, 4-Fume inlet, 5-Fume outlet. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1 to 7 A smoke hood control system based on a high-speed motor includes:

[0039] The power module is used to introduce the mains voltage, which is rectified and filtered to obtain 310V DC power, and then stepped down to obtain 15V DC power.

[0040] The main control MCU module is used to receive PWM signals from the host computer and output control signals to the motor control module.

[0041] The motor control module is used to receive control signals, control the conduction state of six switching transistors based on the control signals to control the working state of motor 2, and feed back current signals to the main control MCU module, which then adjusts the control signals accordingly.

[0042] The gear control module is used to transmit electrical signals to the main control MCU module via buttons, and the main control MCU module controls whether the motor 2 works and adjusts the speed of the motor 2 when the motor 2 is working.

[0043] The display indicator module is used to indicate the working status of motor 2 via LED lights;

[0044] The power module is connected to the main control MCU module and the motor control module, and the main control MCU module is connected to the motor control module, the gear control module, and the display indicator module.

[0045] The motor 2 is installed inside the air duct 3. An air inlet 1 is provided on the first side of the motor 2, an oil fume inlet 4 is provided below the second side of the motor 2, and an oil fume outlet 5 is provided above the second side of the motor 2.

[0046] In a specific embodiment: Please refer to Figure 1 When the motor 2 is working, it draws in air through the air inlet 1, and drives the oil fumes from the oil fume inlet 4 to be discharged from the oil fume outlet 5. The oil fume inlet 4 can be equipped with an air guide device, and the oil fume outlet 5 can be equipped with a device to prevent oil fume backflow.

[0047] Please see Figure 2The mains voltage is introduced through the live wire (L) and neutral wire (N), passing through fuse (FUSE1), varistor (ZR1), multiple capacitors, common-mode inductor (L1), etc., before being input to rectifier (DB1) to become DC. This DC voltage then passes through capacitors (CX3 and E2) to become a stable 310V DC. CN1 is the power interface for connecting to AC power. FUSE1 protects against short circuits in downstream loads. ZR1 varistor monitors pulse and surge interference from the mains grid; it activates immediately when the grid voltage is abnormal to prevent high-voltage interference from damaging internal components of the controller, thus improving its reliability. Capacitors CX1 and CX2 are X2 capacitors, used to filter voltage interference flowing from the grid into the controller, preventing voltage-type interference from the grid from harming internal components. They also filter high-frequency interference generated by the controller, preventing it from being transmitted back to the grid. Capacitors CY1, CY2, CY3, and CY4 are Y capacitors, primarily used to filter common-mode interference in the circuit, suppressing EMI and improving equipment safety. Common-mode inductor L1 is used to filter common-mode interference, suppress EMI, and improve signal quality and stability. Resistors R1, R2, and R3 are bleeder resistors, providing a discharge path for capacitor X2 when the controller plug is unplugged, ensuring that the voltage across the plug drops below 34V within one second. DB1 is a rectifier bridge, converting AC power from the mains into DC power. High-voltage aluminum electrolytic capacitor E2 is a power capacitor, filtering the pulsating DC power from rectifier bridge DB1 to make it smooth DC power. When the AC input is disconnected, capacitor E2 provides brief power support to the circuit, preventing circuit failure due to momentary power loss. CX3 is a CBB capacitor, which filters high-frequency interference generated by the operation of the power circuit.

[0048] Please see Figure 3The 310V DC power supply is protected by a 500V TVS diode Z5. A step-down chip (RF7324 power supply chip) then reduces the 310V to 15V for subsequent circuits. TVS diode Z5 and resistor R53 form a hardware voltage protection circuit. When the input voltage exceeds 500V, this circuit activates, ensuring the input voltage does not exceed 500V, providing sufficient voltage margin for subsequent circuits and protecting them from overvoltage damage. Chip U2 is a BUCK chip, providing a stable low-voltage DC power supply to the subsequent stages. Capacitor C21 is a high-frequency decoupling capacitor for the chip's power supply port; resistor R48 is the chip's bias resistor; resistors R50 and R49 are feedback resistors. Chip U2 adjusts its switching based on the voltage across resistor R49, ensuring stable output; capacitor E1 is the chip's power supply aluminum electrolytic capacitor, providing energy for normal chip operation. Inductor L2 is magnetized when the MOSFET in chip U2 is turned on, and releases its magnetic energy when the MOSFET is turned off. Diode D1 conducts forward when inductor L2 releases its magnetic energy, charging capacitor E1. D2 is a freewheeling diode; when inductor L2 releases its magnetic energy, the current direction in inductor L2 remains unchanged, flowing through capacitor E3, then forward through diode D2, and finally returning to the other end of inductor L2. E3 is a load energy storage and filtering capacitor, used in conjunction with other parts of the circuit to provide a stable and smooth DC voltage at the load end. C3 is a high-frequency filter capacitor at the load end, filtering out high-frequency switching noise from the switching chip. Resistor R45 simulates the load in the power supply circuit, ensuring that the power module is not truly unloaded even when the downstream circuit is not fully open, protecting the downstream circuitry.

[0049] In this embodiment: Please refer to Figure 4 The main control MCU module includes chip U1, model LCP067CC36EU8. Pins 19, 27, 28, 29, 32, 35, and 38 of chip U1 are connected to the motor control module, pin 18 of chip U1 is connected to the gear control module, and pins 4, 5, and 24 of chip U1 are connected to the display indicator module.

[0050] Chip U1 uses the Leadcore LCP067CC36EU8, a 32-bit MCU with a maximum operating frequency of 108MHz, 64KB Flash / 10KB RAM, 16 fast I / Os, 7 timers, 4 communication interfaces, LIN support, 1 ADC, 2 comparators, 3 operational amplifiers, and also integrates 1 LDO (voltage regulator) and high voltage pre-driver. It is a dedicated chip for motor drive 2.

[0051] Resistor R40, diode D7, and capacitor C2 form the power-on reset circuit. TVS diode Z3 is the internal LDO input protection TVS diode; it activates when the voltage is too high, protecting the downstream MCU from damage. Capacitors C15 and C25 are the input capacitors for the chip's built-in LDO, also serving to filter high-frequency interference and decouple the circuit. Pin 30 of the MCU is the input pin of the chip's internal LDO, and pin 2 is the output pin of the LDO. Capacitor C4 is the output load filter capacitor for the LDO. TVS diode Z4 is the LDO output protection TVS diode, protecting the VDD5 network from excessive voltage and maximizing MCU protection. Capacitors C19 and C23 are the input capacitors for the chip's power supply pins (with the same function as capacitors C15 and C25), serving to filter voltage interference and decouple the circuit. Resistor R41 is the chip's functional bias resistor. Capacitors C1, C5, and C14 are the input capacitors for the chip's three built-in operational amplifiers, used to filter high-frequency interference. Resistors R46 and R47 are the programming port protection resistors. Pin 19 of the MCU (chip U1) is the output port of operational amplifier 0. Resistor R44 and capacitor C18 form an integrating circuit, allowing pin 20 of the MCU to reflect the current magnitude. Pin 10 of the MCU, network OVP, is the voltage monitoring port. When the input voltage is outside the set value, the controller automatically enters voltage protection mode; when the port voltage falls within the set value range, the controller operates normally. Pin 9 of the MCU, network PWM, is used to receive PWM signals from the host computer. Based on the product's functional requirements, it calculates the target rotation speed of motor 2 under the current duty cycle and then controls the motor control module to adjust the speed of motor 2 to reach the target speed. Network NRST is the MCU's reset pin, used with a reset circuit to perform a reset action upon power-up. Networks OPA0_P and OPA0_N are the non-inverting and inverting inputs of operational amplifier 0 inside the chip, respectively, used together to measure the current magnitude in the circuit. OPA1_P and OPA1_N are the non-inverting and inverting inputs of the first operational amplifier inside the chip, respectively, used together to calculate the current magnitude in the circuit. OPA2_P and OPA2_N are the non-inverting and inverting inputs of the second operational amplifier inside the chip, respectively. Used together, they can calculate the current in the circuit. The NTC network is the MCU's MOSFET temperature monitoring port; when the MOSFET temperature is too high, the temperature protection function is triggered. The LED network is the MCU display port; this port displays the current operating status of the controller via flashing LEDs.Network LOU is the U-phase lower bridge driver, and this network is the low-side driver pre-driven within the MCU; Network LOV is the V-phase lower bridge driver, and this network is the low-side driver pre-driven within the MCU; Network LOW is the W-phase lower bridge driver, and this network is the low-side driver pre-driven within the MCU; Network U is the U-phase voltage access point; Network V is the V-phase voltage access point; Network W is the W-phase voltage access point; Network HOU is the U-phase upper bridge driver output port, and this network is the high-side driver pre-driven within the MCU's U-phase; Network HOV is the V-phase upper bridge driver output port, and this network is the high-side driver pre-driven within the MCU's V-phase; Network HOW is the W-phase upper bridge driver output port, and this network is the high-side driver pre-driven within the MCU's W-phase; Network VBU is the U-phase bootstrap capacitor interface. After connecting an external bootstrap capacitor to the U port, the U-phase high-side power transistor is driven through the HOU port. Network VBV is the V-phase bootstrap capacitor interface. After connecting an external bootstrap capacitor to the V port, the V-phase high-side power transistor is driven through the HOV port. The network VBW is the W-phase bootstrap capacitor interface. After connecting the bootstrap capacitor to the W port externally, the high-side power transistor of the W phase is driven through the HOW port.

[0052] In this embodiment: Please refer to Figure 5 The motor control module includes MOSFETs M1, M2, M3, M4, M5, and M6. The drain of MOSFET M1 is connected to the drains of MOSFETs M3 and M5, and a 310V voltage. The source of MOSFET M1 is connected to the drain of MOSFET M2 and the first terminal of the three-phase common-mode inductor L3. The source of MOSFET M3 is connected to the drain of MOSFET M4 and the second terminal of the three-phase common-mode inductor L3. The source of MOSFET M5 is connected to the drain of MOSFET M6 and the third terminal of the three-phase common-mode inductor L3. The fourth, fifth, and sixth terminals of the three-phase common-mode inductor L3 are connected to motor 2 via interface CN2. The source of MOSFET M2 is connected to one end of resistor RS3. The source of MOSFET M4 is connected to one end of resistor RS2. The source of MOSFET M6 is connected to the other end of resistor RS3, the other end of resistor RS2, and one end of resistor RS1. The other end of resistor RS1 is grounded.

[0053] The gate of MOSFET M1 is connected to one end of resistor R12 and one end of resistor R28. The other end of resistor R12 is connected to the cathode of diode D11 and the main control MCU module. The anode of diode D11 is connected to the other end of resistor R28.

[0054] The gate of MOSFET M2 is connected to one end of resistor R16 and one end of resistor R42. The other end of resistor R16 is connected to the cathode of diode D14 and the main control MCU module. The anode of diode D14 is connected to the other end of resistor R42.

[0055] The gate of MOSFET M3 is connected to one end of resistor R19 and one end of resistor R31. The other end of resistor R19 is connected to the negative terminal of diode D12 and the main control MCU module. The positive terminal of diode D12 is connected to the other end of resistor R31.

[0056] The gate of MOSFET M4 is connected to one end of resistor R23 and one end of resistor R43. The other end of resistor R23 is connected to the cathode of diode D15 and the main control MCU module. The anode of diode D15 is connected to the other end of resistor R43.

[0057] The gate of MOSFET M5 is connected to one end of resistor R26 and one end of resistor R32. The other end of resistor R26 is connected to the cathode of diode D13 and the main control MCU module. The anode of diode D13 is connected to the other end of resistor R32.

[0058] The gate of MOSFET M6 is connected to one end of resistor R29 and one end of resistor R52. The other end of resistor R29 is connected to the negative terminal of diode D16 and the main control MCU module. The positive terminal of diode D16 is connected to the other end of resistor R52.

[0059] The motor control module consists of three parts: a power circuit, a bootstrap circuit, and a current detection circuit. The power circuit amplifies the signal from the MCU, controls the operating states of MOSFETs M1 to M6, and controls the current to motor 2, causing it to rotate in a predetermined direction. Resistor R12 is the U-phase upper bridge drive resistor, used to transmit the drive signal to the upper bridge MOSFET M1; resistor R13 is the U-phase upper bridge gate-side protection resistor, used to protect the U-phase upper bridge MOSFET from damage due to induced charge; diode D11 is the U-phase upper bridge acceleration turn-off diode. When the U-phase upper bridge is turned off, this diode conducts forward, and the gate charge of the U-phase upper bridge flows through resistor R28 and diode D11 for rapid release, thus achieving rapid turn-off of the MOSFET; resistor R28 is the fast turn-off resistor, and its value directly affects the turn-off time. If the resistance is too large, it will not accelerate the turn-off of the MOSFET; if the resistance is too small, it will cause circuit self-oscillation. The functions of the components at the other five MOSFETs are similar and will not be described further. Resistor RS3 is the U-phase current monitoring resistor, connected to the MCU's internal operational amplifier OPA2, used to monitor the real-time current of motor 2's U-phase; resistor RS2 is the V-phase current monitoring resistor, connected to the MCU's internal operational amplifier OPA1, used to monitor the real-time current of motor 2's V-phase; resistor RS1 is the total current monitoring resistor, connected to the MCU's internal operational amplifier OPA0, used to monitor the real-time current of the entire power circuit; these three sets of current monitoring, together with software, can monitor various abnormal states of motor 2, such as motor 2 phase loss, motor 2 inter-turn short circuit, etc.

[0060] Bootstrap circuit: The bootstrap circuit provides the conditions for the upper bridge MOSFETs M1, M3, and M5 to turn on.

[0061] Current detection circuit: Collects the current on resistors RS1, RS2, and RS3 respectively and sends it back to the MCU (chip U1) to provide a current reference for the control logic in the next instant.

[0062] In this embodiment: Please refer to Figure 6 The gear control module includes resistor R54, resistor R39, capacitor C22, and switch SW1. One end of resistor R54 is connected to 5V voltage, and the other end of resistor R54 is connected to one end of resistor R39 and one end of switch SW1. The other end of switch SW1 is grounded. The other end of resistor R39 is connected to one end of capacitor C22 and the main control MCU module. The other end of capacitor C22 is grounded.

[0063] The four modes of operation—low fan speed, medium fan speed, high fan speed, and off—are cycled through by operating the push-button switch SW1. Each press sends a low-level signal to the MCU, which in turn controls the motor control module to control the working state of motor 2.

[0064] In this embodiment: Please refer to Figure 7 The display indicator module includes LED1, LED2, and LED3. The positive terminal of LED1 is connected to a 5V voltage through resistor R25. The negative terminal of LED1 is connected to the collector of transistor Q2. The emitter of transistor Q2 is grounded. The base of transistor Q2 is connected to the main control MCU module through resistor R56. The positive terminal of LED2 is connected to a 5V voltage through resistor R58. The negative terminal of LED2 is connected to the collector of transistor Q3. The emitter of transistor Q3 is grounded. The base of transistor Q3 is connected to the main control MCU module through resistor R60. The positive terminal of LED3 is connected to a 5V voltage through resistor R59. The negative terminal of LED3 is connected to the collector of transistor Q4. The emitter of transistor Q4 is grounded. The base of transistor Q4 is connected to the main control MCU module through resistor R61.

[0065] When the entire machine is off, LED1, LED2, and LED3 are all off. When the user presses switch SW1 for the first time, LED1 is lit, and motor 2 adjusts to low speed. When the user presses switch SW1 for the second time, LED1 and LED2 are lit, and motor 2 adjusts to medium speed. When the user presses switch SW1 for the third time, LED1, LED2, and LED3 are lit, and motor 2 adjusts to high speed. When the user presses switch SW1 for the fourth time, LED1, LED2, and LED3 are off, motor 2 stops, and the entire machine enters the off state.

[0066] In this embodiment: Please refer to Figure 8The smoke machine control system based on the high-speed motor 2 also includes an input voltage detection module. The input voltage detection module includes resistors R38, R7, R9, and R11, capacitor C9, and diode D10. One end of resistor R38 is connected to 310V. Resistor R38 is connected to one end of resistor R11, the positive terminal of diode D19, one end of capacitor C9, and the main control MCU module in sequence through resistors R7 and R9. The other end of resistor R11 is grounded, the other end of capacitor C9 is grounded, and the negative terminal of diode D10 is connected to 5V.

[0067] The 310V voltage is divided by resistors R38, R7, R9, and R11. Resistor R11 serves as a sampling resistor, feeding back the voltage signal to the main control MCU module. Diode D10 is used to limit the output voltage to prevent excessive voltage from damaging the main control MCU module.

[0068] In this embodiment: Please refer to Figure 9 The smoke hood control system based on the high-speed motor 2 also includes an on-board temperature detection module. The on-board temperature detection module includes a resistor R51, a thermistor RT, and a capacitor C10. One end of the resistor R51 is connected to a 5V voltage, and the other end of the resistor R51 is connected to one end of the thermistor RT, one end of the capacitor C10, and the main control MCU module. The other end of the thermistor RT is grounded, and the other end of the capacitor C10 is grounded.

[0069] The on-board temperature detection module is used to detect the input voltage and on-board temperature. The thermistor RT is a negative temperature coefficient (NTC) temperature monitoring resistor. When the ambient temperature rises, the resistance of the thermistor RT decreases accordingly. Combined with the bias resistor R51, this causes the voltage at the NCT network port to change with the ambient temperature of the NCT at different temperatures. The MCU uses the voltage detected at the port to look up the current ambient temperature in a table. During board layout, the module should be placed as close as possible to the areas of heat generation so that the MCU can accurately monitor the current temperature of the heat-generating components and make corresponding adjustments.

[0070] The working principle of this utility model is as follows: the power supply module is used to introduce the mains voltage, which is rectified and filtered to obtain 310V DC power, and then stepped down to obtain 15V DC power; the main control MCU module is used to receive the PWM signal from the host computer to output control signals to the motor control module; the motor control module is used to receive the control signal, control the conduction state of the six switching transistors based on the control signal to control the working state of the motor 2, and feed back the current signal to the main control MCU module, which adjusts the control signal accordingly; the gear control module is used to transmit electrical signals to the main control MCU module through the buttons, which controls whether the motor 2 is working and adjusts the speed of the motor 2 when it is working; the display indicator module is used to indicate the working state of the motor 2 through LED lights.

[0071] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smoke hood control system based on a high-speed motor, characterized in that, The high-speed motor-based range hood control system includes: The power module is used to introduce the mains voltage, which is rectified and filtered to obtain 310V DC power, and then stepped down to obtain 15V DC power. The main control MCU module is used to receive PWM signals from the host computer and output control signals to the motor control module. The motor control module receives control signals, controls the conduction state of six switching transistors based on the control signals to control the motor's operating state, and feeds back current signals to the main control MCU module, which then adjusts the control signals accordingly. The gear control module is used to transmit electrical signals to the main control MCU module via buttons, and the main control MCU module controls whether the motor works and adjusts the motor speed when the motor is working. The display indicator module is used to indicate the motor's operating status via LED lights; The power module is connected to the main control MCU module and the motor control module, and the main control MCU module is connected to the motor control module, the gear control module, and the display indicator module. The motor is installed inside the air duct. An air inlet is provided on the first side of the motor, an oil fume inlet is provided below the second side of the motor, and an oil fume outlet is provided above the second side of the motor.

2. The high speed motor based range hood control system of claim 1, wherein, The main control MCU module includes chip U1, model number LCP067CC36EU8. Pins 19, 27, 28, 29, 32, 35, and 38 of chip U1 are connected to the motor control module, pin 18 of chip U1 is connected to the gear control module, and pins 4, 5, and 24 of chip U1 are connected to the display indicator module.

3. The high speed motor based range hood control system of claim 2, wherein, The motor control module includes MOSFETs M1, M2, M3, M4, M5, and M6. The drain (D) of MOSFET M1 is connected to the drains of MOSFETs M3 and M5, and a 310V voltage. The source (S) of MOSFET M1 is connected to the drain of MOSFET M2 and the first terminal of the three-phase common-mode inductor L3. The source (S) of MOSFET M3 is connected to the drain of MOSFET M4 and the second terminal of the three-phase common-mode inductor L3. The source (S) of MOSFET M5 is connected to the drain of MOSFET M6 and the third terminal of the three-phase common-mode inductor L3. The fourth, fifth, and sixth terminals of the three-phase common-mode inductor L3 are connected to the motor via interface CN2. The source (S) of MOSFET M2 is connected to one end of resistor RS3. The source (S) of MOSFET M4 is connected to one end of resistor RS2. The source (S) of MOSFET M6 is connected to the other end of resistor RS3, the other end of resistor RS2, and one end of resistor RS1. The other end of resistor RS1 is grounded. The gate of MOSFET M1 is connected to one end of resistor R12 and one end of resistor R28. The other end of resistor R12 is connected to the cathode of diode D11 and the main control MCU module. The anode of diode D11 is connected to the other end of resistor R28. The gate of MOSFET M2 is connected to one end of resistor R16 and one end of resistor R42. The other end of resistor R16 is connected to the cathode of diode D14 and the main control MCU module. The anode of diode D14 is connected to the other end of resistor R42. The gate of MOSFET M3 is connected to one end of resistor R19 and one end of resistor R31. The other end of resistor R19 is connected to the negative terminal of diode D12 and the main control MCU module. The positive terminal of diode D12 is connected to the other end of resistor R31. The gate of MOSFET M4 is connected to one end of resistor R23 and one end of resistor R43. The other end of resistor R23 is connected to the cathode of diode D15 and the main control MCU module. The anode of diode D15 is connected to the other end of resistor R43. The gate of MOSFET M5 is connected to one end of resistor R26 and one end of resistor R32. The other end of resistor R26 is connected to the cathode of diode D13 and the main control MCU module. The anode of diode D13 is connected to the other end of resistor R32. The gate of MOSFET M6 is connected to one end of resistor R29 and one end of resistor R52. The other end of resistor R29 is connected to the negative terminal of diode D16 and the main control MCU module. The positive terminal of diode D16 is connected to the other end of resistor R52.

4. The high speed motor based range hood control system of claim 2, wherein, The gear control module includes resistor R54, resistor R39, capacitor C22, and switch SW1. One end of resistor R54 is connected to 5V voltage, and the other end of resistor R54 is connected to one end of resistor R39 and one end of switch SW1. The other end of switch SW1 is grounded. The other end of resistor R39 is connected to one end of capacitor C22 and the main control MCU module. The other end of capacitor C22 is grounded.

5. The smoke hood control system based on a high-speed motor according to claim 2, characterized in that, The display indicator module includes LED1, LED2, and LED3. The positive terminal of LED1 is connected to a 5V voltage through resistor R25. The negative terminal of LED1 is connected to the collector of transistor Q2. The emitter of transistor Q2 is grounded. The base of transistor Q2 is connected to the main control MCU module through resistor R56. The positive terminal of LED2 is connected to a 5V voltage through resistor R58. The negative terminal of LED2 is connected to the collector of transistor Q3. The emitter of transistor Q3 is grounded. The base of transistor Q3 is connected to the main control MCU module through resistor R60. The positive terminal of LED3 is connected to a 5V voltage through resistor R59. The negative terminal of LED3 is connected to the collector of transistor Q4. The emitter of transistor Q4 is grounded. The base of transistor Q4 is connected to the main control MCU module through resistor R61.

6. The smoke hood control system based on a high-speed motor according to any one of claims 1 to 5, characterized in that, The smoke hood control system based on a high-speed motor also includes an input voltage detection module. The input voltage detection module includes resistors R38, R7, R9, and R11, capacitor C9, and diode D10. One end of resistor R38 is connected to 310V. Resistor R38 is connected in sequence through resistors R7 and R9 to one end of resistor R11, the positive terminal of diode D19, one end of capacitor C9, and the main control MCU module. The other end of resistor R11 is grounded, the other end of capacitor C9 is grounded, and the negative terminal of diode D10 is connected to 5V.

7. The smoke hood control system based on a high-speed motor according to any one of claims 1 to 5, characterized in that, The smoke hood control system based on a high-speed motor also includes an on-board temperature detection module, which includes a resistor R51, a thermistor RT, and a capacitor C10. One end of the resistor R51 is connected to a 5V voltage, and the other end of the resistor R51 is connected to one end of the thermistor RT, one end of the capacitor C10, and the main control MCU module. The other end of the thermistor RT is grounded, and the other end of the capacitor C10 is grounded.

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