Defogging and dehumidifying circuit of waterproof lamp

Abstract

The utility model relates to the field of waterproof lamps, and particularly discloses a demisting and dehumidifying circuit of a waterproof lamp, which comprises a temperature and humidity detection circuit, a master control MCU (Microprogrammed Control Unit), an electronic ventilation valve control circuit and an electronic ventilation valve, the input end of the temperature and humidity detection circuit detects the temperature and humidity in the waterproof lamp in real time, and the output end of the temperature and humidity detection circuit is electrically connected with the communication data input end of the main control MCU and transmits the detected temperature and humidity data to the main control MCU; the output end of the main control MCU is electrically connected with the input end of the electronic ventilation valve control circuit, the main control MCU receives temperature and humidity data through the input end, and the output end outputs high and low levels to control the on and off of the electronic ventilation valve control circuit; the electronic ventilation valve control circuit comprises a triode and a field effect transistor, the base electrode of the triode is electrically connected with the main control MCU, the emitter electrode is grounded, and the collector electrode is electrically connected with the grid electrode of the field effect transistor; the source electrode of the field effect transistor is electrically connected with the power supply, and the drain electrode is electrically connected with the electronic ventilation valve.

Description

Technical Field

[0001] The utility model relates to the field of waterproof lamps, in particular to a demisting and dehumidifying circuit for waterproof lamps. Background Art

[0002] Outdoor products are often exposed to rain, fog, ice and snow, sandstorms, and the alternating temperature between day and night. Therefore, it is particularly necessary for temperature-sensitive outdoor products to be able to adapt to various weather changes. Such problems have always troubled engineering designers. After realizing the problem, various design solutions have been adopted to achieve reliable protection for waterproof lamps, but the following four problems cannot be overcome satisfactorily: 1. The pressure difference between the inside and outside of the lamp is unbalanced. 2. The air tightness is good, and the local heat generation is too high. 3. Water vapor, fogging, etc. 4. Short service life.

[0003] With the emergence of waterproof breathable membranes and waterproof breathable valves, after years of lighting applications, they have proven to be durable and always maintain optimal performance in harsh environments. Their advantages are: 1. They are durable, oil-proof, waterproof, dust-proof and other pollution for outdoor lighting. 2. They extend the service life of outdoor lighting and reduce the shell stress on the applied seals. 3. Breathable products can be installed manually or automatically, are easy to assemble, and have reduced maintenance costs. Waterproof breathable valves are mainly used to make products waterproof and breathable and balance the pressure difference between the inside and outside of the product. The waterproof breathable membrane with high air permeability of the waterproof breathable valve can achieve the purpose of waterproof and breathable, which can well balance the pressure difference.

[0004] However, with the continuous advancement of modern technology, consumers' requirements are getting higher and higher, and the requirements for product dust and water resistance are also constantly increasing, from the initial IP54 waterproof level to the current IP68 waterproof level. In such an environment, waterproof lamps using traditional waterproof breathable valves also begin to have more or less water vapor, fogging and other phenomena. Waterproof lamps with water vapor, fogging and other phenomena can only be quickly dried by disassembling the outer shell, which is not convenient for waterproof lamps fixed in special scenes. At the same time, the entry of water vapor will affect the life of the internal components of the waterproof lamps, thereby shortening the service life of the waterproof lamps. Utility Model Content

[0005] The utility model aims to provide a demisting and dehumidifying circuit for a waterproof lamp with better demisting and dehumidifying performance, so as to prolong the service life of the waterproof lamp.

[0006] The demisting and dehumidifying circuit of the waterproof lamp described in the utility model comprises a temperature and humidity detection circuit, a main control MCU, an electronic ventilation valve control circuit, and an electronic ventilation valve;

[0007] The input end of the temperature and humidity detection circuit detects the temperature and humidity inside the waterproof lamp in real time, and the output end is electrically connected to the communication data input end of the main control MCU, and transmits the detected temperature and humidity data to the main control MCU;

[0008] The output end of the main control MCU is electrically connected to the input end of the electronic ventilation valve control circuit. The main control MCU receives temperature and humidity data from the input end, and the output end outputs high and low levels to control the conduction and cutoff of the electronic ventilation valve control circuit.

[0009] The electronic ventilation valve control circuit comprises a triode and a field effect tube, wherein the base of the triode is electrically connected to the main control MCU, the emitter is grounded, and the collector is electrically connected to the gate of the field effect tube; the source of the field effect tube is electrically connected to the power supply, and the drain is electrically connected to the electronic ventilation valve.

[0010] In the demisting and dehumidifying circuit of the waterproof lamp described in the utility model, the main control MCU detects the temperature and humidity inside the waterproof lamp in real time according to the temperature and humidity detection circuit, controls the electrical level of its output end, and outputs a high electrical level when the humidity inside the waterproof lamp exceeds the standard, drives the triode to conduct, thereby making the field effect tube conduct, connects the power supply of the electronic breathable valve, and starts the demisting and dehumidifying function; when the humidity inside the waterproof lamp is qualified, outputs high and low electrical levels, the triode and the field effect tube are cut off, disconnects the power supply of the electronic breathable valve, and turns off the demisting and dehumidifying function, which can effectively demist and dehumidify the inside of the waterproof lamp, so as to achieve the effect of extending the service life of the waterproof lamp.

[0011] As a preferred solution of the utility model, an I2C bus is set between the temperature and humidity detection circuit and the main control MCU, one end of the I2C bus is electrically connected to the output end of the temperature and humidity detection circuit, and the other end is electrically connected to the input end of the main control MCU.

[0012] As a preferred solution of the utility model, an RS485 bus is set between the temperature and humidity detection circuit and the main control MCU, one end of the RS485 bus is electrically connected to the output end of the temperature and humidity detection circuit, and the other end is electrically connected to the input end of the main control MCU.

[0013] As a preferred solution of the present utility model, the temperature and humidity detection circuit includes a temperature and humidity detection IC, and the SDA pin, ALERT pin, and SCL pin of the temperature and humidity detection IC are electrically connected to the main control MCU respectively.

[0014] As a preferred solution of the utility model, the SDA pin of the temperature and humidity detection IC is connected to a first resistor, one end of the first resistor is electrically connected to the SDA pin, and the other end is electrically connected to the power supply; the ALERT pin of the temperature and humidity detection IC is connected to a second resistor, one end of the second resistor is electrically connected to the ALERT pin, and the other end is electrically connected to the power supply; the SCL pin of the temperature and humidity detection IC is connected to a third resistor, one end of the third resistor is electrically connected to the SCL pin, and the other end is electrically connected to the power supply.

[0015] As a preferred solution of the utility model, the VCC pin on the temperature and humidity detection IC is electrically connected to the power supply and the third resistor, one end of the first filter capacitor is connected to the connection point between the VCC pin, the power supply and the third resistor, and the other end of the first filter capacitor is grounded.

[0016] As a preferred solution of the present invention, the PB7 pin, PB6 pin, and PB5 pin of the main control MCU are electrically connected to the SDA pin, SCL pin, and ALERT pin of the temperature and humidity detection IC respectively; the PD1 pin of the main control MCU is electrically connected to the input end of the electronic ventilation valve control circuit.

[0017] As a preferred solution of the utility model, the VSS-1 pin and the VSS-2 pin of the main control MCU are electrically connected to one end of the second filter capacitor and the third filter capacitor respectively, and the other ends of the second filter capacitor and the third filter capacitor are grounded.

[0018] As a preferred solution of the utility model, a voltage stabilizing diode, a current limiting resistor, a fourth filter capacitor and a first filter resistor are provided at the connection between the base of the transistor and the main control MCU; one end of the voltage stabilizing diode is electrically connected to one end of the current limiting resistor, and the other end is electrically connected to the main control MCU; the other end of the current limiting resistor is electrically connected to the base of the transistor; the fourth filter capacitor and the first filter resistor (R5) are connected in parallel, one end of the parallel node is grounded, and the other end is electrically connected to the base of the transistor.

[0019] As a preferred solution of the utility model, a pull-up resistor is arranged between the gate and the source of the field effect tube, one end of the pull-up resistor is electrically connected to the gate of the field effect tube, and the other end is electrically connected to the source; a fifth filter capacitor and a second filter resistor are arranged at the drain of the field effect tube, the fifth filter capacitor and the second filter resistor are connected in parallel, one end of the parallel node is grounded, and the other end is electrically connected to the drain of the field effect tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a circuit diagram of the demisting and dehumidifying circuit of the waterproof lamp. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the present utility model, it needs to be explained that if there are directional indications involved in the embodiments of the present utility model (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] This embodiment provides a demisting and dehumidifying circuit for a waterproof lamp, such as Figure 1 As shown, it includes a temperature and humidity detection circuit, a main control MCUU1, an electronic ventilation valve control circuit, and an electronic ventilation valve F; the input end of the temperature and humidity detection circuit detects the temperature and humidity in the waterproof lamp in real time, and the output end is electrically connected to the communication data input end of the main control MCU, and transmits the detected temperature and humidity data to the main control MCU; the output end of the main control MCU is electrically connected to the input end of the electronic ventilation valve control circuit, the main control MCU receives the temperature and humidity data from the input end, and the output end outputs high and low levels to control the conduction and cutoff of the electronic ventilation valve control circuit; the electronic ventilation valve control circuit includes a transistor Q1 and a field effect transistor Q2, the base of the transistor Q1 is electrically connected to the main control MCU, the emitter is grounded, and the collector is electrically connected to the gate of the field effect transistor Q2; the source of the field effect transistor Q2 is electrically connected to the power supply, and the drain is electrically connected to the electronic ventilation valve F.

[0024] In another embodiment, an I2C bus is set between the temperature and humidity detection circuit and the main control MCU, one end of the I2C bus is electrically connected to the output end of the temperature and humidity detection circuit, and the other end is electrically connected to the input end of the main control MCU. An RS485 bus can also be set between the temperature and humidity detection circuit and the main control MCU, one end of the RS485 bus is electrically connected to the output end of the temperature and humidity detection circuit, and the other end is electrically connected to the input end of the main control MCU. The temperature and humidity detection circuit can communicate with the main control MCU via I2C or RS485.

[0025] The temperature and humidity detection circuit includes a temperature and humidity detection ICU2. The SDA pin, ALERT pin, and SCL pin of the temperature and humidity detection IC are electrically connected to the main control MCU. The temperature and humidity detection IC can use the CHT8310 temperature and humidity detection IC, and the main control MCU can use the LX32F407RGT7 main control MCU.

[0026] The SDA pin of the temperature and humidity detection IC is connected to a first resistor R1, one end of the first resistor R1 is electrically connected to the SDA pin, and the other end is electrically connected to the power supply, and the first resistor R1 can play a role in voltage stabilization and filtering. In addition, the ALERT pin of the temperature and humidity detection IC is connected to a second resistor R2, one end of the second resistor R2 is electrically connected to the ALERT pin, and the other end is electrically connected to the power supply, and the second resistor R2 can also play a role in voltage stabilization and filtering. In addition, the SCL pin of the temperature and humidity detection IC is connected to a third resistor R3, one end of the third resistor R3 is electrically connected to the SCL pin, and the other end is electrically connected to the power supply. The third resistor R3 can also play a role in voltage stabilization and filtering, and the resistance values ​​of the first resistor R1, the second resistor R2 and the third resistor R3 can all adopt 4K7.

[0027] The VCC pin on the temperature and humidity detection IC is electrically connected to the power supply and the third resistor R3. One end of the first filter capacitor C1 is connected to the connection point between the VCC pin, the power supply and the third resistor R3. The other end of the first filter capacitor C1 is grounded. The circuit can be effectively filtered by the first filter capacitor C1. The capacitance value of the first filter capacitor C1 can be 104 capacitors.

[0028] The PB7 pin, PB6 pin, and PB5 pin of the main control MCU are electrically connected to the SDA pin, SCL pin, and ALERT pin of the temperature and humidity detection IC respectively; the PD1 pin of the main control MCU is electrically connected to the input end of the electronic ventilation valve control circuit. The VSS-1 pin and VSS-2 pin of the main control MCU are electrically connected to one end of the second filter capacitor C2 and the third filter capacitor C3 respectively, and the other ends of the second filter capacitor C2 and the third filter capacitor C3 are grounded. The second filter capacitor C2 and the third filter capacitor C3 can play a role in filtering the main control MCU to the ground. The second filter capacitor C2 and the third filter capacitor C3 can use 0805 capacitors with a capacitance of 225.

[0029] The transistor Q1 can be a SS8050 transistor. A voltage stabilizing diode D1, a current limiting resistor R4, a fourth filter capacitor C4 and a first filter resistor R5 are provided at the connection between the base of the transistor Q1 and the main control MCU. One end of the voltage stabilizing diode D1 is electrically connected to one end of the current limiting resistor R4, and the other end is electrically connected to the main control MCU. The voltage stabilizing diode D1 can be used. The high-voltage diode D1 can be a LL4148 voltage diode, and the resistance value of the current limiting resistor R4 can be 1K. The fourth filter capacitor C4 and the first filter resistor R5 are connected in parallel, one end of the parallel node is grounded, and the other end is electrically connected to the base of the transistor Q1. The filter circuit in which the fourth filter capacitor C4 and the first filter resistor R5 are connected in parallel can effectively filter the circuit. The capacitance value of the fourth filter capacitor C4 can be 106 capacitors, and the resistance value of the first filter resistor R5 can be 10K.

[0030] The field effect tube Q2 can be a field effect tube of model NCE2309. A pull-up resistor R6 is provided between the gate and source of the field effect tube Q2. One end of the pull-up resistor R6 is electrically connected to the gate of the field effect tube Q2, and the other end is electrically connected to the source. The resistance value of the pull-up resistor R6 can be 10K. A fifth filter capacitor C5 and a second filter resistor R7 are provided at the drain of the field effect tube Q2. The fifth filter capacitor C5 and the second filter resistor R7 are connected in parallel. One end of the parallel node is grounded, and the other end is electrically connected to the drain of the field effect tube Q2. The circuit can also be effectively filtered through the circuit in which the fifth filter capacitor C5 and the second filter resistor R7 are connected in parallel. The capacitance value of the fifth filter capacitor C5 can be 104 capacitors, and the resistance value of the second filter resistor R7 can be 4K7. The electronic vent valve F and the field effect tube Q2 can be electrically connected by a plug-in socket 2P to facilitate disassembly and assembly.

[0031] The main control MCUU1 detects the temperature and humidity inside the waterproof lamp in real time according to the temperature and humidity detection ICU2, and controls the level of its output end. If the humidity inside the waterproof lamp exceeds the standard, it outputs a high level to drive the transistor Q1 to conduct, thereby turning on the field effect tube Q2, connecting the power supply of the electronic breathable valve, and starting the defogger and dehumidification function; if the humidity inside the waterproof lamp is qualified, it outputs high and low levels, the transistor Q1 and the field effect tube Q2 are cut off, the power supply of the electronic breathable valve is disconnected, and the defogger and dehumidification function is turned off, which can effectively defog and dehumidify the inside of the waterproof lamp to achieve the effect of extending the service life of the waterproof lamp.

[0032] The above embodiments are only used to illustrate the detailed scheme of the utility model. The utility model is not limited to the above detailed scheme, that is, it does not mean that the utility model must rely on the above detailed scheme to be implemented. Those skilled in the art should understand that any improvement to the utility model, equivalent replacement of various raw materials of the utility model product, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the utility model.

Claims

1. A demisting and dehumidifying circuit for a waterproof lamp, characterized in that: Including temperature and humidity detection circuit, main control MCU (U1), electronic ventilation valve control circuit, electronic ventilation valve; The input end of the temperature and humidity detection circuit detects the temperature and humidity inside the waterproof lamp in real time, and the output end is electrically connected to the communication data input end of the main control MCU, and transmits the detected temperature and humidity data to the main control MCU; The output end of the main control MCU is electrically connected to the input end of the electronic ventilation valve control circuit. The main control MCU receives temperature and humidity data from the input end, and the output end outputs high and low levels to control the conduction and cutoff of the electronic ventilation valve control circuit. The electronic ventilation valve control circuit comprises a triode (Q1) and a field effect tube (Q2); the base of the triode (Q1) is electrically connected to a main control MCU, the emitter is grounded, and the collector is electrically connected to the gate of the field effect tube (Q2); the source of the field effect tube (Q2) is electrically connected to a power supply, and the drain is electrically connected to the electronic ventilation valve.

2. The demisting and dehumidifying circuit of the waterproof lamp according to claim 1, characterized in that: An I2C bus is set between the temperature and humidity detection circuit and the main control MCU, one end of the I2C bus is electrically connected to the output end of the temperature and humidity detection circuit, and the other end is electrically connected to the input end of the main control MCU.

3. The demisting and dehumidifying circuit of the waterproof lamp according to claim 1, characterized in that: An RS485 bus is set between the temperature and humidity detection circuit and the main control MCU, one end of the RS485 bus is electrically connected to the output end of the temperature and humidity detection circuit, and the other end is electrically connected to the input end of the main control MCU.

4. The demisting and dehumidifying circuit of the waterproof lamp according to claim 1, characterized in that: The temperature and humidity detection circuit comprises a temperature and humidity detection IC (U2), and the SDA pin, ALERT pin and SCL pin of the temperature and humidity detection IC are electrically connected to the main control MCU respectively.

5. The demisting and dehumidifying circuit of the waterproof lamp according to claim 4, characterized in that: The SDA pin of the temperature and humidity detection IC is connected to a first resistor (R1), one end of the first resistor (R1) is electrically connected to the SDA pin, and the other end is electrically connected to a power supply; the ALERT pin of the temperature and humidity detection IC is connected to a second resistor (R2), one end of the second resistor (R2) is electrically connected to the ALERT pin, and the other end is electrically connected to the power supply; the SCL pin of the temperature and humidity detection IC is connected to a third resistor (R3), one end of the third resistor (R3) is electrically connected to the SCL pin, and the other end is electrically connected to the power supply.

6. The demisting and dehumidifying circuit of the waterproof lamp according to claim 5, characterized in that: The VCC pin on the temperature and humidity detection IC is electrically connected to a power supply and a third resistor (R3), one end of a first filter capacitor (C1) is connected to a connection point where the VCC pin is electrically connected to the power supply and the third resistor (R3), and the other end of the first filter capacitor (C1) is grounded.

7. The demisting and dehumidifying circuit of the waterproof lamp according to claim 4, characterized in that: The PB7 pin, PB6 pin, and PB5 pin of the main control MCU (U1) are electrically connected to the SDA pin, SCL pin, and ALERT pin of the temperature and humidity detection IC respectively; the PD1 pin of the main control MCU (U1) is electrically connected to the input end of the electronic ventilation valve control circuit.

8. The demisting and dehumidifying circuit of the waterproof lamp according to claim 7, characterized in that: The VSS-1 pin and the VSS-2 pin of the main control MCU are electrically connected to one end of the second filter capacitor (C2) and the third filter capacitor (C3), respectively, and the other ends of the second filter capacitor (C2) and the third filter capacitor (C3) are grounded.

9. The demisting and dehumidifying circuit of the waterproof lamp according to claim 1, characterized in that: A voltage stabilizing diode (D1), a current limiting resistor (R4), a fourth filter capacitor (C4) and a first filter resistor (R5) are provided at the connection point between the base of the triode (Q1) and the main control MCU; one end of the voltage stabilizing diode (D1) is electrically connected to one end of the current limiting resistor (R4), and the other end is electrically connected to the main control MCU; the other end of the current limiting resistor (R4) is electrically connected to the base of the triode (Q1); the fourth filter capacitor (C4) and the first filter resistor (R5) are connected in parallel, one end of the parallel node is grounded, and the other end is electrically connected to the base of the triode (Q1).

10. The demisting and dehumidifying circuit of the waterproof lamp according to claim 1, characterized in that: A pull-up resistor (R6) is arranged between the gate and source of the field effect tube (Q2), one end of the pull-up resistor (R6) is electrically connected to the gate of the field effect tube (Q2), and the other end is electrically connected to the source; a fifth filter capacitor (C5) and a second filter resistor (R7) are arranged at the drain of the field effect tube (Q2), the fifth filter capacitor (C5) and the second filter resistor (R7) are connected in parallel, one end of the parallel node is grounded, and the other end is electrically connected to the drain of the field effect tube (Q2).

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