Ceiling fan light control circuit with overload and overheat protection

Abstract

This utility model discloses a ceiling fan light control circuit with dual overload and overheat protection, including an overload circuit, an overheat circuit, a current overload protection circuit, and a temperature overload protection circuit. The overload circuit includes transistors VT1, VT2, VD8, and VT4, resistors R5 and VT6, three sets of resistors R1, R2, R3, R4, R6, R7, R8, and R9, capacitor C1, LED, resistor R6, transistor VT5, diode VD7, and transistor VT3. This ceiling fan light control circuit with dual overload and overheat protection embeds a current overload protection circuit in the control circuit. When the current exceeds the threshold, it triggers a bimetallic strip deformation cutoff circuit. After the current returns to normal, the power supply is automatically restored. A temperature sensor is integrated into the control circuit coil to adjust the fan speed, avoid continuous high-temperature operation, and extend the service life of the ceiling fan light.

Description

Technical Field

[0001] This utility model relates to the field of ceiling fan light technology, specifically a ceiling fan light control circuit with dual overload and overheat protection. Background Technology

[0002] Ceiling fan lights are more energy-efficient than air conditioners under the same usage conditions. Using them in conjunction with air conditioning can reduce energy consumption and electricity bills. Their larger airflow accelerates air circulation, improving indoor comfort. Installed on the ceiling, they don't take up floor space, making them suitable for areas like dining rooms and living rooms that require both lighting and ventilation, especially suitable for small apartments. With global warming and the trend towards environmental protection and energy conservation, the use of high-power appliances like air conditioners is increasingly restricted. One air conditioner consumes the equivalent power of 20 ceiling fans. When the temperature doesn't exceed 30 degrees Celsius, a fan is perfectly adequate for cooling. Among all types of fans—table fans, standing fans, and ceiling fans—only ceiling fans produce the largest airflow with the same amount of power. Furthermore, using a ceiling fan in conjunction with air conditioning reduces the load on the air conditioner, prevents temperature fluctuations indoors, and reduces the risk of catching a cold, resulting in excellent comfort.

[0003] However, traditional ceiling fan lights have the following drawbacks:

[0004] Traditional ceiling fan light overload protection mechanisms are simplistic, relying solely on fuses or temperature control switches. These mechanisms are slow to respond and cannot actively adjust the load, leading to damage to the ceiling fan light. Utility Model Content

[0005] The purpose of this invention is to provide a ceiling fan light control circuit with dual overload and overheat protection, in order to solve the problem mentioned in the background art that the traditional ceiling fan light overload protection mechanism is singular, relying only on fuses or temperature control switches, with slow response speed and inability to actively adjust the load, resulting in the damage of the ceiling fan light.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ceiling fan light control circuit with dual overload and overheat protection, including an overload circuit, an overheat circuit, a current overload protection circuit, and a temperature overload protection circuit. The overload circuit includes transistors VT1 and VT2, diode VD8, transistor VT4, resistor R5, transistor VT6, three sets of resistors R1, R2, R3, R4, R6, R7, R8, and R9, capacitor C1, an LED, resistor R6, transistor VT5, diode VD7, and transistor VT3. The overheat protection circuit includes integrated circuit U1, transistors Q1 and Q2, resistors R10, R11, R12, and R13, capacitor C2, transistor OT1, resistors R14 and R15, transistor Q3, capacitor C3, diode D1, inductor T1B, inductor T1A, diode D1, and resistor R16. The current overload protection circuit includes resistors R17, R18, and R19, diode D2, transistors Q4 and Q5. The temperature overload protection circuit includes control chip U103, resistor R24, diode U8, and capacitor C139.

[0007] Preferably, one end of transistor VT3 is connected to one end of diode VD7, the other end of diode VD7 is connected to one end of transistor VT1, and the other end of transistor VT1 is connected to one end of transistor VT2, one end of resistor R1, one end of resistor R2, one end of resistor R3, one end of resistor R4, one end of resistor R8, one end of resistor R9, and one end of capacitor C1. The other end of transistor VT2 is connected to one end of diode VD8, and the surface of transistor VT1 is connected to the other end of resistor R1, the other end of resistor R3, one end of resistor R6, one end of transistor VT5, and one end of transistor VD7. One end of T3 is connected, the other end of diode VD7 is connected to the other end of transistor VT3, the other end of transistor VT5 is connected to the other ends of resistor R6 and resistor R8 respectively, the surface of transistor VT2 is connected to the other ends of resistor R2, resistor R4, one end of transistor VT4 and the other end of resistor R7 respectively, the other end of resistor R7 is connected to the other end of resistor R9 and one end of transistor VT6 respectively, the other ends of transistor VT4 and the other ends of transistor VT6 are both connected to one end of resistor R5, and the other end of capacitor C1 is connected to one end of light-emitting diode LED.

[0008] Preferably, pin 1 of integrated circuit U1 is connected to one end of resistor R13 and one end of transistor OT1, pin 3 of integrated circuit U1 is connected to one end of resistor R12 and one end of resistor R14, the other end of resistor R12 is connected to one end of transistor Q2, the other end of transistor Q2 is connected to one end of transistor Q1 and one end of resistor R11, the other end of transistor Q1 is connected to one end of resistor R10, and the other end of resistor R10 is connected to one end of resistor R13. The other end is connected to one end of capacitor C2. Pin 6 of integrated circuit U1 is connected to one end of transistor Q3. The other end of transistor Q3 is connected to one end of inductor T1B and one end of inductor T1A. The other end of inductor T1B is connected to one end of diode D1. The other end of diode D1 is connected to one end of capacitor C3 and one end of resistor R16. The other end of transistor Q3 is connected to one end of resistor R15. Pin 2 of integrated circuit U1 and the other end of resistor R15 are both grounded.

[0009] Preferably, one end of transistor Q4 is connected to one end of diode D2, one end of resistor R19, and one end of resistor R17, respectively. The other end of resistor R19 is connected to one end of transistor Q5. The other ends of transistor Q5, resistor R19, diode D2, and transistor Q4 are all connected to one end of resistor R18, and the other end of resistor R18 is grounded.

[0010] Preferably, one end of the control chip U103 is connected to one end of the resistor R24 ​​and one end of the diode U8, and the other end of the control chip U103 is connected to one end of the capacitor C139. The other ends of the capacitor C139 and the diode U8 are both grounded.

[0011] Compared with the prior art, the beneficial effects of this utility model are: an overload protection circuit is embedded in the control circuit, which triggers the bimetallic strip deformation cutoff circuit when the current exceeds the threshold, and automatically restores power supply after the current returns to normal; a temperature sensor is integrated in the control circuit coil to adjust the fan speed, avoid continuous high-temperature operation, and extend the service life of the ceiling fan light. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the architecture of this utility model;

[0013] Figure 2 This is the circuit diagram of the overload circuit of this utility model;

[0014] Figure 3 This is a circuit diagram of the overheating circuit of this utility model;

[0015] Figure 4This is a circuit diagram of the current overload protection circuit of this utility model;

[0016] Figure 5 This is the circuit diagram of the temperature overload protection circuit of this utility model. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Please see Figure 1-5 This utility model provides a ceiling fan light control circuit with dual overload and overheat protection, including an overload circuit, an overheat circuit, a current overload protection circuit, and a temperature overload protection circuit. The overload circuit includes transistors VT1 and VT2, diode VD8 and VT4, resistors R5 and VT6, three sets of resistors R1, R2, R3, R4, R6, R7, R8, and R9, capacitor C1, LED, resistor R6, transistor VT5, diode VD7, and transistor VT3. The overheat protection circuit includes... The circuit includes integrated circuit U1, transistors Q1 and Q2, resistors R10, R11, R12, and R13, capacitor C2, transistor OT1, resistors R14 and R15, transistor Q3, capacitor C3, diode D1, inductor T1B and T1A, diode D1, and resistor R16. The current overload protection circuit includes resistors R17, R18, and R19, diode D2, transistors Q4 and Q5. The temperature overload protection circuit includes control chip U103, resistor R24, diode U8, and capacitor C139.

[0019] One end of transistor VT3 is connected to one end of diode VD7. The other end of diode VD7 is connected to one end of transistor VT1. The other end of transistor VT1 is connected to one end of transistor VT2, one end of resistor R1, one end of resistor R2, one end of resistor R3, one end of resistor R4, one end of resistor R8, one end of resistor R9, and one end of capacitor C1. The other end of transistor VT2 is connected to one end of diode VD8. The surface of transistor VT1 is connected to the other end of resistor R1, the other end of resistor R3, one end of resistor R6, one end of transistor VT5, and one end of transistor VT6. One end of capacitor C1 is connected to the LED. The other end of diode VD7 is connected to the other end of transistor VT3. The other end of transistor VT5 is connected to the other ends of resistor R6 and resistor R8 respectively. The surface of transistor VT2 is connected to the other ends of resistor R2, resistor R4, one end of transistor VT4, and resistor R7 respectively. The other end of resistor R7 is connected to the other end of resistor R9 and one end of transistor VT6 respectively. The other ends of transistor VT4 and transistor VT6 are both connected to one end of resistor R5. The other end of capacitor C1 is connected to one end of LED.

[0020] Pin 1 of integrated circuit U1 is connected to one end of resistor R13 and one end of transistor OT1. Pin 3 of integrated circuit U1 is connected to one end of resistor R12 and one end of resistor R14. The other end of resistor R12 is connected to one end of transistor Q2. The other end of transistor Q2 is connected to one end of transistor Q1 and one end of resistor R11. The other end of transistor Q1 is connected to one end of resistor R10. The other end of resistor R10 is connected to the other end of resistor R13 and one end of capacitor C2. Pin 6 of integrated circuit U1 is connected to one end of transistor Q3. The other end of transistor Q3 is connected to one end of inductor T1B and one end of inductor T1A. The other end of inductor T1B is connected to one end of diode D1. The other end of diode D1 is connected to one end of capacitor C3 and one end of resistor R16. The other end of transistor Q3 is connected to one end of resistor R15. Pin 2 of integrated circuit U1 and the other end of resistor R15 are both grounded.

[0021] One end of transistor Q4 is connected to one end of diode D2, one end of resistor R19, and one end of resistor R17. The other end of resistor R19 is connected to one end of transistor Q5. The other ends of transistor Q5, resistor R19, diode D2, and transistor Q4 are all connected to one end of resistor R18. The other end of resistor R18 is grounded.

[0022] One end of the control chip U103 is connected to one end of the resistor R24 ​​and one end of the diode U8, respectively. The other end of the control chip U103 is connected to one end of the capacitor C139. The other ends of the capacitor C139 and the diode U8 are both grounded.

[0023] In this embodiment, VT3-VT6 form a composite complementary symmetrical power amplifier output stage circuit, and VD7, VD8, and Rs form an overload protection circuit. R and R9 are sampling resistors with very small resistance values. The current overload protection circuit connects a sampling resistor in series with the source S of the PMOS at the power input terminal. This sampling resistor will have a voltage difference, and the be of the transistor is connected in parallel to this resistor. When the voltage difference is greater than Vbe, Vgs becomes 0, the PMOS turns off, and overcurrent protection is achieved. The temperature overload protection circuit provides a 5V voltage to U103MAX6501 through the Zener diode. When the temperature is normal, pin 5 of U103 outputs a high level. When the temperature exceeds the protection point, pin 5 of U103 outputs a low level. When the temperature recovers, pin 5 of U103 outputs a high level.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ceiling fan light control circuit with dual overload and overheat protection, including an overload circuit, an overheat circuit, a current overload protection circuit, and a temperature overload protection circuit, characterized in that: The overload circuit includes transistors VT1 and VT2, diodes VD8 and VT4, resistors R5 and VT6, three sets of resistors R1, R2, R3, R4, R7, R8, and R9, capacitor C1, LED, resistor R6, transistor VT5, diode VD7, and transistor VT3. The overheating circuit includes integrated circuit U1, transistors Q1 and Q2, resistors R10, R11, R12, and R13, capacitor C2, transistor OT1, resistors R14 and R15, transistor Q3, capacitor C3, diode D1, inductors T1B and T1A, diode D1, and resistor R16. The current overload protection circuit... The circuit includes resistors R17, R18, and R19, diode D2, transistor Q4, and transistor Q5. The temperature overload protection circuit includes a control chip U103, resistor R24, diode U8, and capacitor C139. One end of transistor VT3 is connected to one end of diode VD7. The other end of diode VD7 is connected to one end of transistor VT1. The other end of transistor VT1 is connected to one end of transistor VT2, one end of resistors R1, R2, R3, R4, R8, and R9, and one end of capacitor C1. The other end of transistor VT2 is connected to one end of diode VD8. The surface of transistor VT1 is respectively connected to… The other ends of resistors R1, R3, and R6, one end of transistor VT5, and one end of transistor VT3 are connected. The other end of diode VD7 is connected to the other end of transistor VT3. The other end of transistor VT5 is connected to the other ends of resistors R6 and R8. The surface of transistor VT2 is connected to the other ends of resistors R2, R4, VT4, and R7. The other end of resistor R7 is connected to the other end of resistor R9 and one end of transistor VT6. The other ends of transistors VT4 and VT6 are both connected to one end of resistor R5. The other end of capacitor C1 is connected to LED LE. One end of D is connected. Pin 1 of integrated circuit U1 is connected to one end of resistor R13 and one end of transistor OT1. Pin 3 of integrated circuit U1 is connected to one end of resistor R12 and one end of resistor R14. The other end of resistor R12 is connected to one end of transistor Q2. The other end of transistor Q2 is connected to one end of transistor Q1 and one end of resistor R11. The other end of transistor Q1 is connected to one end of resistor R10. The other end of resistor R10 is connected to the other end of resistor R13 and one end of capacitor C2. Pin 6 of integrated circuit U1 is connected to one end of transistor Q3. The other end of transistor Q3 is connected to one end of inductor T1B and one end of inductor T1A.The other end of inductor T1B is connected to one end of diode D1. The other end of diode D1 is connected to one end of capacitor C3 and one end of resistor R16. The other end of transistor Q3 is connected to one end of resistor R15. Pin 2 of integrated circuit U1 and the other end of resistor R15 are both grounded.

2. The ceiling fan light control circuit with overload and overheat protection according to claim 1, characterized in that: One end of transistor Q4 is connected to one end of diode D2, one end of resistor R19, and one end of resistor R17. The other end of resistor R19 is connected to one end of transistor Q5. The other ends of transistor Q5, resistor R19, diode D2, and transistor Q4 are all connected to one end of resistor R18. The other end of resistor R18 is grounded.

3. The ceiling fan light control circuit with overload and overheat protection according to claim 1, characterized in that: One end of the control chip U103 is connected to one end of the resistor R24 ​​and one end of the diode U8, respectively. The other end of the control chip U103 is connected to one end of the capacitor C139. The other end of the capacitor C139 and the other end of the diode U8 are both grounded.

Images