Explosion-proof lamp having color temperature adjustment function

Abstract

An explosion-proof lamp having a color temperature adjustment function. The explosion-proof lamp comprises a housing main body, an LED dual-color-temperature light board and a control circuit, wherein the LED dual-color-temperature light board is provided with a first LED lamp group having a high color temperature and a second LED lamp group having a low color temperature, and the control circuit controls the operation of the first LED lamp group and the second LED lamp group; the control circuit comprises an LED driving power source and a color temperature adjustment control unit, and an input end and an output end of the LED dual-color-temperature light board are respectively connected to an output end of the LED driving power source and an input end of the color temperature adjustment control unit; and the color temperature adjustment control unit further comprises a color temperature DIP-switch adjustment unit, a color temperature intrinsic-safety-barrier control unit, a voltage sampling unit, a control power supply unit, a control center unit, a shunting control unit and an interface unit, and the control center unit controls the operation of the shunting control unit on the basis of a sampled voltage of the voltage sampling unit, so as to control the connection and disconnection of circuits of the first LED lamp group and the second LED lamp group. Therefore, users can perform color temperature adjustment on the basis of their own usage requirements. The overall structure is flexible, and the practicability is high.

Description

Explosion-proof lamp with color temperature adjustment function

[0001] This application claims priority to the invention entitled "Explosion-proof lamp with color temperature adjustment function", filed with the Chinese Patent Office on July 31, 2025, application number 202521624515.9. Technical Field

[0002] This application relates to a lighting fixture, and more particularly to an explosion-proof lamp with color temperature adjustment function. Background Technology

[0003] With the increasing maturity and stability of LED technology, LED lighting fixtures have been widely used in various places where human activities take place, and explosion-proof lights are a type of LED lighting fixture. Explosion-proof lights are lighting devices specifically designed for flammable and explosive hazardous locations, capable of preventing internal electrical sparks or high temperatures from igniting flammable gases, dust, or vapors in the surrounding environment.

[0004] Traditional explosion-proof lights have the following defects in use and production:

[0005] (1) Since ordinary explosion-proof lights can only be made into one color temperature after leaving the factory, for example, if the explosion-proof light is made into a 4000K color temperature power after leaving the factory, if the customer finds that a 6000K color temperature explosion-proof light is needed during the use after installation, then the customer will have to buy it again, which will result in a waste of money and time.

[0006] (2) The explosion-proof lamps produced by the manufacturer can only be made in one color temperature. In order to meet the needs of different customer groups, it is necessary to produce explosion-proof lamps with different color temperatures. Accordingly, the manufacturer needs to stock explosion-proof lamps with different color temperatures, which will result in an additional increase in the stock quantity, inventory backlog, etc., which will ultimately affect the manufacturer's product cycle, capital recovery, etc.

[0007] Application content

[0008] Therefore, it is necessary to provide an explosion-proof lamp with color temperature adjustment function to address the shortcomings of traditional technologies.

[0009] An explosion-proof lamp with color temperature adjustment function includes a housing body, an LED dual-color temperature lamp board, and a control circuit. The LED dual-color temperature lamp board is provided with a first LED lamp group with a high color temperature and a second LED lamp group with a low color temperature. The control circuit controls the operation of the first LED lamp group and the second LED lamp group. The control circuit includes an LED driver power supply and a color temperature adjustment control unit. The input and output terminals of the LED dual-color temperature lamp board are respectively connected to the output terminal of the LED driver power supply and the input terminal of the color temperature adjustment control unit.

[0010] The color temperature control unit further includes a color temperature DIP switch adjustment unit, a color temperature safety barrier control unit, a voltage sampling unit, a control power supply unit, a control center unit, a shunt control unit, and an interface unit. The LED driver power supply is connected to the input terminal of the control power supply unit, the input terminal of the first LED group, and the input terminal of the low color temperature second LED group. The output terminals of the first LED group and the second LED group are connected to the shunt control unit. The current after being regulated by the control power supply unit flows through the color temperature DIP switch adjustment unit, the color temperature safety barrier control unit, and the voltage sampling unit. The control center unit controls the operation of the shunt control unit according to the sampling voltage of the voltage sampling unit.

[0011] The beneficial effects of the explosion-proof lamp with color temperature adjustment function in this application are as follows: By setting a color temperature adjustment control unit and setting a first LED group with a high color temperature and a second LED group with a low color temperature on the LED dual color temperature lamp board, the color temperature adjustment control unit further includes a color temperature dial adjustment unit, a color temperature safety barrier control unit, a voltage sampling unit, a control power supply unit, a control center unit, a shunt control unit, and an interface unit. The control center unit controls the shunt control unit to work according to the sampling voltage of the voltage sampling unit, thereby controlling the circuit switching of the first LED group and the second LED group, so that the entire LED dual color temperature lamp board is in one of the high color temperature state, intermediate color temperature state, or low color temperature state, so that the user can adjust the color temperature according to their own usage needs. The overall structure is flexible and highly practical. Attached Figure Description

[0012] Figure 1 is a schematic diagram showing the connection of each module in this application;

[0013] Figure 2 is an application block diagram of this application;

[0014] Figure 3 is a schematic diagram of the seal being opened according to this application, wherein the seal is a plug;

[0015] Figure 4 is a schematic diagram of the seal being opened according to this application, wherein the seal is a cover;

[0016] Figure 5 is a schematic diagram showing the connection of each module of the power control unit and color temperature control unit in this application.

[0017] Figure 6 shows the circuit diagram of the color temperature control unit in this application;

[0018] Figure 7 is a circuit diagram of the power control unit in this application. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0020] Please refer to Figures 1 to 7. This application provides an explosion-proof lamp with color temperature adjustment function, including a housing body 40, an LED dual-color temperature lamp board 10, a control circuit 20, and a sealing element 30. The LED dual-color temperature lamp board 10 and the control circuit 20 are disposed inside the housing body 40. The LED dual-color temperature lamp board 10 is provided with a first LED lamp group 11 with a high color temperature and a second LED lamp group 12 with a low color temperature. The control circuit 20 controls the first LED lamp group 11 and the second LED lamp group 12 to work.

[0021] The shell body 40 is provided with a positioning hole 41. The sealing element 30 is installed on the shell body 40 and seals the positioning hole 41. In this embodiment, the positioning hole 41 has an internal thread on its wall and the outer peripheral surface of the sealing element 30 has an external thread. The sealing element 30 and the positioning hole 41 are installed by screw engagement. In addition, the sealing element 30 can be in the form of a plug (as shown in Figure 3) or a cap (as shown in Figure 4).

[0022] The control circuit 20 includes an LED driver power supply 21, a power adjustment control unit 23, and a color temperature adjustment control unit 22. Both the power adjustment control unit 23 and the color temperature adjustment control unit 22 are electrically connected to the LED driver power supply 21. The power adjustment control unit 23 adjusts the output power of the LED driver power supply 21. The LED driver power supply 21 supplies power to the color temperature adjustment control unit 22 and the LED dual-color temperature lamp board 10. The input and output terminals of the LED dual-color temperature lamp board 10 are respectively connected to the output terminal of the LED driver power supply 21 and the input terminal of the color temperature adjustment control unit 22. The color temperature adjustment control unit 22 controls the on / off state of the circuits of the first LED lamp group 11 and the second LED lamp group 12 to achieve color temperature adjustment.

[0023] The color temperature control unit 22 further includes a color temperature dial adjustment unit 221, a color temperature safety barrier control unit 222, a voltage sampling unit 223, a control power supply unit 226, a control center unit 224, a current shunt control unit 225, and an interface unit 227. The LED driver power supply 21 is connected to the input terminal of the control power supply unit 226, the input terminal of the first LED group 11, and the input terminal of the low color temperature second LED group 12. The output terminals of the first LED group 11 and the second LED group 12 are connected to the current shunt control unit 225. The current after being regulated by the control power supply unit 226 flows through the color temperature dial adjustment unit 221, the color temperature safety barrier control unit 222, and the voltage sampling unit 223. The control center unit 224 controls the current shunt control unit 225 to work according to the sampling voltage of the voltage sampling unit 223, thereby controlling the circuit switching of the first LED group 11 and the second LED group 12, so that the entire LED dual color temperature light board 10 is in one of the high color temperature state, the intermediate color temperature state, or the low color temperature state.

[0024] Specifically, the interface unit 227 includes a first port 2271, a second port 2272, and a third port 2273. The first port 2271 is connected to the output terminal of the LED driver power supply 21, the second port 2272 is connected to the output terminal of the first LED lamp group 11, and the third port 2273 is connected to the output terminal of the second LED lamp group 12.

[0025] The control power supply unit 226 is connected to the first port 2271 of the interface unit 227. The control power supply unit 226 is equipped with a voltage regulator U2 and a fuse F3. The voltage regulator U2 regulates the current flowing out of the control power supply unit 226. When the current flowing through the control power supply unit 226 is too large, the temperature of the fuse rises and the fuse F3 is disconnected.

[0026] The control center unit 224 includes a control chip U1, which has an A / D port, a PWM1 port, a PWM2 port, and a VCC port. The VCC port of the control chip U1 is connected to the output terminal of the control power supply unit 226. The LED driver unit supplies power to the control chip U1 through the control power supply unit 226.

[0027] The input terminal of the voltage sampling unit 223 is connected to the output terminal of the control power supply unit 226. The output terminal of the voltage sampling unit 223 is grounded. A sampling point Vin is provided on the voltage sampling unit 223. Sampling resistors R14 and R15 are provided between the sampling point Vin and the output terminal of the voltage sampling unit 223.

[0028] The main circuit of the color temperature safety barrier control unit 222 is equipped with a fuse F2 and a current-limiting resistor R9. The two ends of the main circuit of the color temperature safety barrier control circuit 20 are respectively connected to the sampling point Vin of the voltage sampling unit 223 and the color temperature dial adjustment unit 221. The color temperature safety barrier control circuit 20 is also equipped with a Zener diode ZD3. One end of the Zener diode ZD3 is connected in parallel in the circuit between the main circuit of the color temperature safety barrier control circuit 20 and the color temperature dial adjustment unit 221, and the other end of the Zener diode ZD3 is grounded.

[0029] The color temperature DIP switch unit 221 includes a first DIP switch 229 and several voltage-regulating resistors. The first DIP switch 229 can switch states to connect one or more voltage-regulating resistors to the circuit for voltage division. In this embodiment, the voltage-regulating resistors are divided into two paths. One path consists of resistors R6 and R5 connected in series, and the other path consists of resistors R7 and R8 connected in series. The first DIP switch 229 can be adjusted to three states. When the first DIP switch 229 is adjusted to the first state, the voltage-regulating resistor composed of resistors R6 and R5 connected in series is connected to the circuit, and the other voltage-regulating resistor composed of resistors R7 and R8 is inactive. When the first DIP switch 229 is adjusted to the second state, the voltage-regulating resistor composed of resistors R6 and R5 is inactive, and the other voltage-regulating resistor composed of resistors R7 and R8 is connected to the circuit. When the first DIP switch 229 is adjusted to the third state, both voltage-regulating resistors are connected to the circuit.

[0030] The current shunt control unit 225 further includes a first current shunt circuit and a second current shunt circuit. The first current shunt circuit is equipped with a PMOS transistor Q1, the drain of which is connected to the output terminal of the first LED lamp group 11, the source of which is grounded, and the gate of which is connected to the PWM1 port of the control chip U1 through a resistor R17. The second current shunt circuit is equipped with a PMOS transistor M1, the drain of which is connected to the output terminal of the second LED lamp group 12, the source of which is grounded, and the gate of which is connected to the PWM2 port of the control chip U1 through a resistor R18.

[0031] During operation, by adjusting the state of the first DIP switch 229, one or more voltage regulating resistors are connected to the circuit for voltage division, thereby adjusting the voltage at the sampling point Vin on the voltage sampling unit 223. The control chip U1 detects the magnitude of the voltage at the sampling point Vin through the A / D port and controls the voltages of the PWM1 and PWM2 ports according to the magnitude of the voltage at the sampling point Vin, thereby controlling the conduction state of PMOS transistors Q1 and M1, so that one or both of the first LED group 11 and the second LED group 12 are in working state. Specifically:

[0032] (1) When Vin > Va, PWM1 outputs a high level continuously. At this time, MOSFET Q1 is turned on, and the first LED group 11 with high color temperature is lit. PWM2 outputs a low level continuously. At this time, MOSFET M1 is turned off, and the second LED group 12 with low color temperature is turned off. The entire LED dual color temperature light board 10 presents a high color temperature state.

[0033] (2) When (Vb+Vth)<Vin<(Va-Vth), both PWM1 and PWM2 ports output a high level continuously. At this time, MOSFET Q1 and MOSFET M1 are turned on, and the first LED group 11 with high color temperature and the second LED group 12 with low color temperature are lit. The entire LED dual color temperature light board 10 presents an intermediate color temperature state.

[0034] (3) When Vin < Vb, PWM1 outputs a low level and PWM2 outputs a high level. At this time, MOSFET Q1 is cut off and the first LED group 11 with high color temperature is turned off. PWM2 outputs a low level and MOSFET M1 is turned on. The second LED group 12 with low color temperature is lit and the entire LED dual color temperature LED dual color temperature light board 10 presents a low color temperature state.

[0035] Wherein, Vin is the voltage magnitude of the sampling point Vin. The voltage values ​​of Va, Vb and Vth are set according to actual needs. Among them, Va > Vb and (Va-Vb) > Vth*2. Vth is preferably set to be greater than 0.3V. Vth is a hysteresis voltage value set according to the error of the electronic components themselves to avoid circuit malfunctions and thus ensure accurate and interference-free state switching.

[0036] In addition, the control circuit 20 further includes a silicone potting layer 228 on the color temperature control unit 22. This silicone potting layer 228 seals and wraps around the color temperature safety barrier control unit 222, voltage sampling unit 223, control power supply unit 226, control center unit 224, and shunt control unit 225. The color temperature DIP switch adjustment unit 221 and interface unit 227 are exposed outside the silicone potting layer 228. This effectively prevents the color temperature safety barrier control unit 222, voltage sampling unit 223, control power supply unit 226, control center unit 224, and shunt control unit 225 from generating sparks during operation, thus avoiding potential installation hazards. For the color temperature DIP switch adjustment unit 221, voltage and current are limited by a Zener diode ZD3, current-limiting resistor R9, and fuse F2, ensuring that the color temperature DIP switch adjustment unit 221 meets the requirement of not generating sparks and that the DIP switch adjustment circuit meets the requirements of a safety circuit. In this embodiment, to facilitate the adjustment of the first DIP switch 229, the first DIP switch 229 is disposed inside the housing body 40, and the first DIP switch 229 and the sealing member 30 are arranged opposite each other in the vertical direction.

[0037] In this embodiment, a dimmer 50 is also included. An external power supply is connected to the power control unit 23 via the dimmer 50. By setting the power control unit 23 on the circuit, and the power control unit 23 is equipped with a second DIP switch 234, the client can toggle the second DIP switch 234 to the corresponding position according to the LED lighting power required by the application scenario. When the switch is turned on, it will form a current loop with other devices, which can control the voltage values ​​of Driver DIM+ and Driver DIM- at the dimming port of the LED driver power supply 21 to change, thereby changing the output current of the LED driver power supply 21 and thus changing the power of the LED lighting.

[0038] Specifically, the power control unit 23 includes a power DIP switch adjustment unit 231 and a power safety barrier circuit unit 232. The main circuit of the power safety barrier circuit unit 232 is equipped with a fuse F1 and a current limiting resistor R3. The color temperature safety barrier control unit 222 is also equipped with a Zener diode ZD1. One end of the Zener diode ZD1 is connected in parallel in the circuit between the main circuit of the power safety barrier circuit unit 232 and the power DIP switch adjustment unit 231, and the other end of the Zener diode ZD1 is grounded.

[0039] The power DIP switch adjustment unit 231 includes a second DIP switch 234 and several voltage regulating resistors. The second DIP switch 234 can switch states to connect one or more voltage regulating resistors to the circuit for voltage division.

[0040] In addition, the control circuit 20 further includes a silicone potting layer 233 on the power control unit 23. The silicone potting layer 233 seals and wraps around the outside of the power safety barrier circuit unit 232, while the power DIP switch adjustment unit 231 and the interface unit 227 are exposed outside the silicone potting layer 233. This effectively prevents the power safety barrier circuit unit 232 from generating sparks during operation, thus avoiding potential installation hazards. For the power DIP switch adjustment unit 231, voltage and current limiting are achieved using a Zener diode ZD1, a current-limiting resistor R3, and a fuse F1, ensuring that the color temperature DIP switch adjustment unit 221 meets the requirement of not generating sparks. In this embodiment, to facilitate adjustment of the second DIP switch 234, the second DIP switch 234 is located inside the housing body 40, and the second DIP switch 234 and the sealing member 30 are vertically opposite each other.

[0041] The beneficial effects of the explosion-proof lamp with color temperature adjustment function in this application are as follows: by setting a color temperature adjustment control unit 22, and setting a first LED group 11 with high color temperature and a second LED group 12 with low color temperature on the LED dual color temperature lamp board 10, the color temperature adjustment control unit 22 further includes a color temperature dial adjustment unit 221, a color temperature safety barrier control unit 222, a voltage sampling unit 223, a control power supply unit 226, a control center unit 224, a shunt control unit 225 and an interface unit 227. The control center unit 224 controls the shunt control unit 225 to work according to the sampling voltage of the voltage sampling unit 223, thereby controlling the circuit switching of the first LED group 11 and the second LED group 12, so that the entire LED dual color temperature lamp board 10 is in a high color temperature state, a medium color temperature state, or a low color temperature state, so that the user can adjust the color temperature according to their own usage needs. The overall structure is flexible and highly practical.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An explosion-proof lamp with color temperature adjustment function, wherein, The device includes a housing, an LED dual-color temperature lamp board, and a control circuit. The LED dual-color temperature lamp board is equipped with a first LED lamp group with a high color temperature and a second LED lamp group with a low color temperature. The control circuit controls the operation of the first LED lamp group and the second LED lamp group. The control circuit includes an LED driver power supply and a color temperature adjustment control unit. The input and output terminals of the LED dual-color temperature lamp board are respectively connected to the output terminal of the LED driver power supply and the input terminal of the color temperature adjustment control unit. The color temperature control unit further includes a color temperature DIP switch adjustment unit, a color temperature safety barrier control unit, a voltage sampling unit, a control power supply unit, a control center unit, a shunt control unit, and an interface unit. The LED driver power supply is connected to the input terminal of the control power supply unit, the input terminal of the first LED group, and the input terminal of the low color temperature second LED group. The output terminals of the first LED group and the second LED group are connected to the shunt control unit. The current after being regulated by the control power supply unit flows through the color temperature DIP switch adjustment unit, the color temperature safety barrier control unit, and the voltage sampling unit. The control center unit controls the operation of the shunt control unit according to the sampling voltage of the voltage sampling unit.

2. The explosion-proof lamp with color temperature adjustment function according to claim 1, wherein, It also includes a sealing element. The LED dual-color temperature lamp board and control circuit are located inside the shell body. The shell body is provided with a positioning hole. The sealing element is installed on the shell body and seals the positioning hole.

3. The explosion-proof lamp with color temperature adjustment function according to claim 2, wherein, The color temperature adjustment unit includes a first DIP switch, which is located inside the housing body and is positioned opposite to the sealing element in the vertical direction.

4. The explosion-proof lamp with color temperature adjustment function according to claim 3, wherein, The sealing element is a plug or a cap.

5. The explosion-proof lamp with color temperature adjustment function according to claim 3, wherein, The color temperature DIP switch adjustment unit also includes several voltage regulating resistors. The first DIP switch can switch states to connect one or more voltage regulating resistors to the circuit for voltage division.

6. The explosion-proof lamp with color temperature adjustment function according to claim 1, wherein, The control circuit further includes a silicone potting layer on the color temperature control unit. The silicone potting layer seals and wraps around the outside of the color temperature safety barrier control unit, voltage sampling unit, control power supply unit, control center unit, and shunt control unit, while the color temperature dial switch adjustment unit and interface unit are exposed outside the silicone potting layer.

7. The explosion-proof lamp with color temperature adjustment function according to claim 6, wherein, The control power supply unit is equipped with a voltage regulator U2 and a fuse F3. The main circuit of the color temperature safety barrier control unit is equipped with a fuse F2 and a current limiting resistor R9. The two ends of the main circuit of the color temperature safety barrier control circuit unit are respectively connected to the voltage sampling unit and the color temperature DIP switch adjustment unit. The color temperature safety barrier control circuit unit is also equipped with a Zener diode ZD3. One end of the Zener diode ZD3 is connected in parallel in the circuit between the main circuit of the color temperature safety barrier control circuit unit and the color temperature DIP switch adjustment unit 221, and the other end of the Zener diode ZD3 is grounded.

8. The explosion-proof lamp with color temperature adjustment function according to claim 1, wherein, The control center unit is equipped with a control chip U1, which has an A / D port, a PWM1 port, and a PWM2 port. The control chip U1 detects the sampled voltage of the voltage sampling unit 223 through the A / D port. The current shunt control unit further includes a first current shunt circuit and a second current shunt circuit. The first current shunt circuit is equipped with a PMOS transistor Q1, the drain of which is connected to the output terminal of the first LED group, the source of which is grounded, and the gate of which is connected to the PWM1 port of the control chip U1 through a resistor R17. The second current shunt circuit is equipped with a PMOS transistor M1, the drain of which is connected to the output terminal of the second LED group, the source of which is grounded, and the gate of which is connected to the PWM2 port of the control chip U1 through a resistor R18.

9. The explosion-proof lamp with color temperature adjustment function according to claim 2, wherein, The control circuit also includes a power control unit, which adjusts the output power of the LED driver power supply. The power control unit includes a power DIP switch adjustment unit and a power safety barrier circuit unit. The main circuit of the power safety barrier circuit unit is equipped with a fuse F1 and a current-limiting resistor R3. The color temperature safety barrier control unit is also equipped with a Zener diode ZD1. One end of the Zener diode ZD1 is connected in parallel in the circuit between the main circuit of the power safety barrier circuit unit and the power DIP switch adjustment unit, and the other end of the Zener diode ZD1 is grounded.

10. The explosion-proof lamp with color temperature adjustment function according to claim 9, wherein, The control circuit further includes a silicone potting layer on the power control unit. The silicone potting layer seals and wraps around the outside of the power safety barrier circuit unit, while the power DIP switch adjustment unit and the interface unit are exposed outside the silicone potting layer.

11. The explosion-proof lamp with color temperature adjustment function according to claim 9, wherein, The power DIP switch adjustment unit includes a second DIP switch and several voltage regulating resistors. The second DIP switch can switch states to connect one or more voltage regulating resistors to the circuit for voltage division.

12. The explosion-proof lamp with color temperature adjustment function according to claim 11, wherein, The second DIP switch is located inside the housing body, and the second DIP switch and the seal are arranged opposite each other in the vertical direction.

Images