Agricultural dual-mode conversion lamp circuit

Abstract

The utility model discloses an agricultural dual-mode conversion lamp circuit, which relates to the technical field of agricultural lighting, aims to solve the problem of lamp installation cost in agricultural places needing special lighting, and comprises a driving module, the driving module comprises a rectifying unit and a voltage reduction unit, and the rectifying unit is connected with the voltage reduction unit. The input end of the rectification unit is connected with a power supply, and the output end of the rectification unit is connected with the input end of the step-down unit which is connected with the input end of the integrated chip U2. The output end of the driving module is connected with a control module, the control module comprises an integrated chip U2 and an MOS tube connected with the integrated chip U2, and the MOS tube is connected with a light-emitting unit. According to the utility model, the lighting mode can be switched between normal lighting and special lighting through the switch, so that the installation cost of the lamp is effectively reduced, and the purpose that one lamp has multiple purposes and is adjusted as required is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural lighting, and particularly relates to a circuit of an agricultural dual-mode conversion lamp. Background Technique

[0002] At present, various special lamps are installed in many special places such as agricultural sites, such as plant lighting, ultraviolet sterilization, and other special LED lighting. When people enter the place, the lighting mode needs to be changed to adapt to the needs of the human eye. To solve this problem, two kinds of LED lamps need to be installed, but this will cause the installation cost to increase geometrically. The dual-mode conversion lamp can switch between two modes, which can reduce various costs, meet the requirements of "one lamp with multiple functions and adjustable according to needs", significantly save the installation cost, and better fit the use scenario.

[0003] For example, a Chinese patent with the publication number of CN108662471A relates to a high-pressure sodium lamp for an intelligent plant cultivation greenhouse, which is composed of a high-pressure sodium lamp tube 1, a reflector 2, a heat insulation and heat conduction plate 3, an arch plate 4, a ballast 5, a pressing plate 6, a hook 7 and a wiring seat 8. The high-pressure sodium lamp tube is an agricultural high-pressure sodium lamp tube with a power of 1000W and a PAR value of 2020 μmol / S at a wavelength of 400-700nm, and is installed on the wiring seat 8; the reflector 2 is a double-layer structure, and the inner reflective layer is made of a bean-patterned mirror thin aluminum plate and is installed inside the arch plate 4; the heat insulation and heat conduction plate 3 adopts a two-step inclined plane design and is installed above the reflector 2; the arch plate 4, the top wedge is inserted into the ballast 5, a quick-insert terminal is installed in the upper wiring box, and wiring seats 8 are installed at both ends; the ballast 5 is a numerically controlled dimming electronic ballast with a power of 1000w, and a hook 7 is installed at the top; the hook 7 adopts a non-directional opening design, so that the lamp has excellent performance, is easy to install, has a long service life, and is safe and reliable. However, this patent cannot simultaneously achieve normal lighting that meets the needs of the human eye, so additional normal lighting lamps need to be installed separately in the greenhouse, resulting in a high installation cost. Content of the Utility Model

[0004] In order to solve the problem of high installation cost, the utility model provides a circuit of an agricultural dual-mode conversion lamp, which can switch the lighting mode between normal lighting and special lighting through a switch, effectively reducing the installation cost of the lamp and realizing "one lamp with multiple functions and adjustable according to needs".

[0005] To achieve the above object, the utility model adopts the following technical scheme: A circuit of an agricultural dual-mode conversion lamp includes a driving module, the driving module includes a rectifying unit and a step-down unit, the input end of the rectifying unit is connected to a power supply, the output end of the rectifying unit is connected to the input end of the step-down unit, and the output end of the step-down unit is connected to the input end of an integrated chip U2;

[0006] The output end of the driving module is connected to a control module. The control module includes an integrated chip U2 and a MOS transistor connected to the integrated chip U2. The MOS transistor is connected to a lighting unit.

[0007] In this technical solution, the AC mains is converted into a high-voltage DC power supply via a rectifying unit, and then output as a stable low-voltage power supply via a bucking unit while maintaining a constant current output. The constant-current power supply output by the driving module is connected to the VCC input pin 1 of the control module to supply power to the control module. The control module includes an integrated chip U2, and a detection module is provided inside the integrated chip U2 for detecting the switch state. The switch state signal can be input by a wall switch, Bluetooth, or WIFI.

[0008] The present utility model is further configured as: the output end of the integrated chip U2 is connected to the gate of the MOS transistor, and the drain of the MOS transistor is connected to a lighting unit.

[0009] In this technical solution, the switch state signal drives the MOS transistor to control different lighting units.

[0010] The present utility model is further configured as: the rectifying unit includes a bridge rectifier circuit, and the bridge rectifier circuit is also connected to a filtering circuit; the bucking unit includes an integrated chip U1.

[0011] In this technical solution, the rectifying unit can convert alternating current into stable direct current. The rectifying unit includes a bridge rectifier circuit, which consists of a transformer and four diodes. The four diodes are connected in pairs to form a bridge, and a filtering circuit is connected in parallel between pin 2 and pin 4. The filtering circuit plays a voltage stabilizing role.

[0012] The present utility model is further configured as: the lighting unit includes a first lighting unit and a second lighting unit, and the first lighting unit and the second lighting unit are respectively connected to the output end of the control module.

[0013] In this technical solution, the lighting unit can be any lighting device such as a lamp bead or an LED module. The control module controls the lighting and extinguishing of the lighting unit according to the switch state signal to achieve the switching of different lighting modes.

[0014] The present utility model is further configured as: a protection module is connected to the front end of the driving module, and the protection module is specifically a protection device F1.

[0015] In this technical solution, F1 ensures disconnection when the driving module fails, protecting the circuit before the mains input.

[0016] The present utility model is further configured as: a capacitor module is connected in parallel across the power supply, and the capacitor module is capacitor C7.

[0017] In this technical solution, a capacitor C7 is connected in parallel across the power supply terminals to reduce the impact of noise and interference on the circuit and smooth out voltage mutations.

[0018] The present utility model is further configured as: The integrated chip U1 is a step-down type LED constant current driving chip.

[0019] In this technical solution, the integrated chip U1 is internally provided with a high-precision current sampling circuit and adopts a patented constant current control technology to achieve high-precision LED constant current output and excellent line voltage regulation rate. The chip operates in the critical mode of inductor current, and the output current does not change with the change of the inductance value and the LED operating voltage, achieving excellent load regulation rate. The chip also has multiple protection functions, including LED short-circuit protection, under-voltage protection of the chip power supply, external OVP, chip overheat regulation, etc.

[0020] The present utility model is further configured as: The integrated chip U2 is a switchable color temperature controller with memory function.

[0021] In this technical solution, the integrated chip U2 has a memory function. Its internal set state switching window time (Tsw) is such that when the light-off time is less than the state switching window time and the light is turned on, it switches to the next lighting mode; when the light-off time is greater than the state switching window time, the chip remembers the state before the light was turned off, and directly presents the state before the last light-off when the light is turned on next time.

[0022] The present utility model is further configured as: The integrated chip U2 is internally provided with a switch signal detection module.

[0023] In this technical solution, the integrated chip U2 obtains the switch state signal through the switch signal detection module, and then controls the level state of the output terminal.

[0024] The beneficial effects of the present utility model are:

[0025] It is possible to use one switch to control the light-emitting units of two different lighting modes, realizing multiple lighting modes for one lamp, and the lighting mode can also be adjusted as needed, without the need to install multiple lamps with different lighting modes, greatly saving the installation cost. Description of the Drawings

[0026] Figure 1 It is the schematic diagram of the circuit driving module of the agricultural dual-mode conversion lamp of the present utility model.

[0027] Figure 2 It is the schematic diagram of the circuit control module of the agricultural dual-mode conversion lamp of the present utility model. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific implementation manners described herein are only the best embodiments of the present utility model, which are only used to explain the present utility model and do not limit the protection scope of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0029] Embodiment 1

[0030] This embodiment provides a dual-mode conversion lamp circuit applied in agricultural sites, which can control the lighting mode to switch between normal lighting and ultraviolet sterilization lighting through a wall switch.

[0031] Preferably, the wall switch is a single-control push-button switch.

[0032] In some other implementation manners, the wall switch can be a multi-switch single-control push-button switch, etc.

[0033] The agricultural dual-mode conversion lamp circuit includes a driving module and a control module. The output end of the driving module is connected to the input end of the control module. As Figure 1-2 shown, A1+, A2+, and A3+ are respectively connected to A1-, A2-, and A3-.

[0034] As Figure 1 shown, the driving module includes a rectifying unit and a buck unit. The input end of the rectifying unit is connected to the power supply. Preferably, the input end of the rectifying unit is connected to the mains input line, and the power supply is controlled to be turned on and off by the wall switch.

[0035] The rectifying unit includes a bridge rectifier circuit and a filtering circuit. The bridge rectifier circuit consists of a transformer and four diodes. The four diodes are connected in pairs to form a bridge. A filtering circuit is connected in parallel between pin 2 and pin 4. The filtering circuit plays a voltage stabilizing role, and the rectifying unit converts alternating current into stable direct current.

[0036] The output end of the rectifying unit is connected to the input end of the buck unit. The buck unit includes an integrated chip U1. Preferably, the integrated chip U1 is selected as a buck-type LED constant current driving chip. Specifically, the chip BP2866XJ can be selected.

[0037] This chip is an external OVP buck-type LED constant current driving chip. The chip operates in the critical continuous mode of inductor current and is suitable for non-isolated buck-type LED constant current power supplies with an input voltage range of 85Vac to 265Vac. The ROVP pin of the chip has an Enable function and is suitable for switch color mixing and induction lamp applications.

[0038] The chip integrates a 500V power switch internally, adopts patented demagnetization detection technology and high-voltage JFET power supply technology, eliminating the need for VCC capacitors and startup resistors, making its peripheral devices simpler and saving on peripheral costs and volume.

[0039] The chip is built with a high-precision current sampling circuit and also adopts patented constant current control technology to achieve high-precision LED constant current output and excellent line voltage regulation rate. The chip operates in the critical mode of inductor current, and the output current does not change with the change of inductance and LED operating voltage, achieving excellent load regulation rate.

[0040] The chip also has multiple protection functions, including LED short-circuit protection, chip power supply undervoltage protection, external OVP, chip overheat regulation, etc.

[0041] The chip has 7 pins. Pin 1 is grounded, pin 2 is OVP, there is a resistor R1 connected between pin 2 and pin 1, and a capacitor C6 is also connected in parallel with resistor R1. Pin 4 is connected to the high-voltage direct current output by the rectification unit; there are resistors R2 and R3 connected in parallel between pin 1 and pin 7. Pins 5 and 6 are both DRAIN. There is a capacitor C8 connected between pin 6 and pin 7. There is a diode connected between pin 6 and pin 4, and a capacitor C4 and a resistor R6 are connected in parallel with the diode. C4 and R6 are connected in series. Pin 4 is connected to the power input terminal VCC of the control module through a series resistor R9, and pin 5 is connected to the clock input port CLK of the control module through a series resistor R10.

[0042] The buck unit can achieve buck and current stabilization functions, converting the high-voltage direct current output by the rectification unit into low-voltage stable direct current and maintaining a constant current output at the same time.

[0043] Such as Figure 2 As shown, the control module includes an integrated chip U2 and a MOS transistor. The output terminal of the buck unit is connected to the input terminal of the integrated chip U2. The output terminal of the integrated chip U2 is connected to the gate of the MOS transistor, and the drain of the MOS transistor is connected to a light-emitting unit.

[0044] Preferably, the integrated chip U2 is a switchable color temperature controller with memory function. Specifically, the S4120MB chip is selected.

[0045] The chip determines the on / off state by detecting the wall switch input signal, ensuring the logical consistency when multiple power supplies are applied simultaneously, and can be compatible with multiple LED driving schemes such as Flyback, Buck-Boost, Buck, and linear.

[0046] The chip has a memory function. The internal set state switching window time (Tsw) is 6.4 seconds. If the light-off time is less than the state switching window time and the light is turned on, it will switch to the next lighting mode; if the light-off time is greater than the state switching window time, the chip will remember the state before the light was turned off, and directly present the state before the last light-off when the light is turned on next time.

[0047] In some other embodiments, other integrated chips U2 can also be selected, and the state switching window time (Tsw) can also be different, and can be set to any time from 0.5 seconds to 10 seconds.

[0048] Preferably, the light-emitting unit includes a first light-emitting unit and a second light-emitting unit, and the first light-emitting unit and the second light-emitting unit are respectively connected to the output end of the control module. In this embodiment, the first light-emitting unit LED1 is an ultraviolet lamp bead, and the second light-emitting unit LED2 is a normal lamp bead.

[0049] In some other embodiments, the light-emitting unit can be any light-emitting device such as a lamp bead or an LED module.

[0050] In some other embodiments, other integrated chips U2 can be selected and connected to multiple light-emitting units.

[0051] A protection module is connected to the front end of the drive module. In this embodiment, the protection module is specifically a protection device F1, which ensures disconnection when the drive module fails and protects the circuit before the mains input.

[0052] A capacitor module is connected in parallel across the power supply. In this embodiment, the capacitor module includes a capacitor C7, which can reduce the influence of noise and interference on the circuit and smooth the voltage mutation.

[0053] The working principle and process of the dual-mode conversion lamp circuit in this embodiment will be described below.

[0054] The AC mains is converted into a high-voltage DC power supply via the rectification unit, and then output into a stable low-voltage power supply via the buck unit, while maintaining a constant current output; the constant-current power supply output by the drive module is connected to the VCC input pin 1 of the control module to supply power to the control module; the control module includes an integrated chip U2, and a detection module is provided inside the integrated chip U2 to detect the switch state. The switch state signal can be controlled by a wall switch, and the switch state signal drives the MOS transistor to control the states of different light-emitting units.

[0055] Whether the drive module works or not is controlled by the wall switch. When the switch controls the drive module to work, the CLK pin is at a high level, and when the switch controls the drive module to stop working, the CLK pin is at a low level.

[0056] In the initial state, when the wall switch is used for the first time to turn on the light, the CLK pin is at a high level. The high level of D1 turns on Q1, and LED1 lights up. The low level of D2 turns off Q2, and LED2 remains off. The lamp uses ultraviolet lighting. Press the wall switch again, and the lamp turns off.

[0057] If the wall switch is pressed again to turn on the light within the state switching window time (TSW) of 6.4 s, the level of the CLK pin experiences a change from high to low to high, which causes the integrated chip U2 to control the output terminal D1 to become low, turning off Q1 and LED1, and D2 to become high, turning on Q2 and LED2, completing the switching of the rear-end LEDs, and the lamp changes to normal lighting.

[0058] That is to say, when a person enters the place, the lamp is still in the ultraviolet lighting state. The lighting mode can be directly changed by turning off the light and then turning it on again to adapt to the needs of the human eye. If the person intends to leave the place and wants to continue with ultraviolet sterilization, the lighting mode can be changed back to ultraviolet lighting by turning off the light and then turning it on again.

[0059] If the wall switch is pressed again to turn on the light after the light-off time exceeds the state switching window time (TSW) of 6.4 s, the integrated chip U2 will remember the state before turning off the light, and the control output terminal D1 remains at the high level before the last light-off, turning on Q1 and keeping LED1 lit. D2 remains at the low level before the last light-off, turning off Q2 and keeping LED2 off. The lamp still uses the ultraviolet lighting mode.

[0060] That is to say, if ultraviolet sterilization is no longer needed, when a person enters the place and the lamp is still in the ultraviolet lighting state, the lighting mode can be changed back to normal lighting by turning off the light and then turning it on again to adapt to the needs of the human eye. After the person finishes working and presses the wall switch to turn off the light when leaving the place, the lamp turns off. After a period of time, when returning to the place again and pressing the wall switch to turn on the light, since the light-off time has exceeded the state switching window time (TSW), the lamp directly shows the normal lighting state before turning off the light, making it more convenient to use. If the person hopes to turn on ultraviolet sterilization when leaving, the lighting mode can be changed by turning off the light and then turning it on again before leaving.

[0061] Embodiment 2

[0062] This embodiment provides a dual-mode conversion lamp circuit applied in an agricultural place, which can control the lighting mode to switch between normal lighting, plant light supplement, and ultraviolet sterilization through Bluetooth.

[0063] The agricultural dual-mode conversion lamp circuit includes a driving module and a control module. The output terminal of the driving module is connected to the input terminal of the control module.

[0064] The driving module includes a rectifying unit and a buck unit. The input end of the rectifying unit is connected to a power supply. Preferably, the input end of the rectifying unit is connected to the mains input line.

[0065] The rectifying unit includes a bridge rectifier circuit and a filtering circuit. The bridge rectifier circuit consists of a transformer and four diodes. The four diodes are connected in pairs to form a bridge. A filtering circuit is connected in parallel between pin 2 and pin 4. The filtering circuit plays a voltage stabilizing role. The rectifying unit converts alternating current into stable direct current.

[0066] The output end of the rectifying unit is connected to the input end of the buck unit. The buck unit includes an integrated chip U1. Preferably, the integrated chip U1 is selected as a buck-type LED constant current driving chip.

[0067] The buck unit can realize the functions of bucking and current stabilizing, converting the high-voltage direct current output by the rectifying unit into low-voltage stable direct current and simultaneously maintaining a constant current output.

[0068] The control module includes an integrated chip U2 and a MOS transistor. The output end of the buck unit is connected to the input end of the integrated chip U2. The output end of the integrated chip U2 is connected to the gate of the MOS transistor. The drain of the MOS transistor is connected to a light-emitting unit.

[0069] Preferably, the integrated chip U2 is a switchable color temperature controller with memory function.

[0070] In this embodiment, the state switching window time (Tsw) set inside the integrated chip U2 is 2 s. The light-emitting unit includes a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. The first light-emitting unit is a plant growth supplementary light LED module, the second light-emitting unit is an LED module for ultraviolet illumination, and the third light-emitting unit is an LED module for normal illumination.

[0071] The integrated chip U2 of the control module is connected to a mobile phone via Bluetooth, and the state of the light-emitting unit is controlled through a mobile phone APP. The user can select the working light-emitting unit through the mobile phone APP.

[0072] Embodiment III

[0073] This embodiment provides a dual-mode conversion lamp circuit applied in an agricultural site, which can switch the lighting mode between normal lighting and plant lighting through WIFI control.

[0074] The agricultural dual-mode conversion lamp circuit includes a driving module and a control module. The output end of the driving module is connected to the input end of the control module.

[0075] The driving module includes a rectifying unit and a buck unit. The input end of the rectifying unit is connected to a power supply. Preferably, the input end of the rectifying unit is connected to the mains input line.

[0076] The rectifying unit includes a bridge rectifier circuit and a filtering circuit. The bridge rectifier circuit consists of a transformer and four diodes. The four diodes are connected in pairs to form a bridge. A filtering circuit is connected in parallel between pin 2 and pin 4. The filtering circuit plays a voltage stabilizing role. The rectifying unit converts alternating current into stable direct current.

[0077] The output end of the rectifying unit is connected to the input end of the bucking unit. The bucking unit includes an integrated chip U1. Preferably, the integrated chip U1 is selected as a buck-type LED constant current driving chip.

[0078] The bucking unit can realize the functions of bucking and current stabilizing, convert the high-voltage direct current output by the rectifying unit into low-voltage stable direct current, and simultaneously maintain a constant current output.

[0079] The control module includes an integrated chip U2 and a MOS transistor. The output end of the bucking unit is connected to the input end of the integrated chip U2. The output end of the integrated chip U2 is connected to the gate of the MOS transistor. The drain of the MOS transistor is connected to a lighting unit.

[0080] Preferably, the integrated chip U2 is a switchable color temperature controller with memory function.

[0081] In this embodiment, the state switching window time (Tsw) set inside the integrated chip U2 is 0.5 s. The lighting unit includes a first lighting unit LED1 and a second lighting unit LED2. The first lighting unit LED1 is an LED module for plant lighting, and the second lighting unit LED2 is an LED module for normal lighting.

[0082] The integrated chip U2 of the control module is connected to a mobile phone via WIFI, and the state of the lighting unit is controlled through a mobile phone APP. The user can select the working lighting unit through the mobile phone APP.

Claims

1. An agricultural dual-mode conversion lamp circuit, characterized in that: It includes a driving module, the driving module includes a rectifier unit and a buck unit, the input end of the rectifier unit is connected to the power supply, the output end of the rectifier unit is connected to the input end of the buck unit, and the output end of the buck unit is connected to the input end of the integrated chip U2; The output end of the driving module is connected to a control module, and the control module includes an integrated chip U2 and a MOS tube connected to the integrated chip U2, and the MOS tube is connected to a light-emitting unit.

2. The agricultural dual-mode conversion lamp circuit according to claim 1 is characterized in that: The output end of the integrated chip U2 is connected to the gate of the MOS tube, and the drain of the MOS tube is connected to the light-emitting unit.

3. The agricultural dual-mode conversion lamp circuit according to claim 1 is characterized in that: The rectifying unit comprises a bridge rectifying circuit, and the bridge rectifying circuit is also connected to a filtering circuit.

4. The agricultural dual-mode conversion lamp circuit according to claim 1 is characterized in that: The voltage reduction unit includes an integrated chip U1, the integrated chip U1 is connected to a plurality of resistors, and the integrated chip U1 is connected to a plurality of capacitors.

5. The agricultural dual-mode conversion lamp circuit according to claim 1, characterized in that: The light-emitting unit includes a first light-emitting unit and a second light-emitting unit, and the first light-emitting unit and the second light-emitting unit are respectively connected to the output end of the control module.

6. The agricultural dual-mode conversion lamp circuit according to claim 1, characterized in that: A protection module is connected to the front end of the driving module, and the protection module is specifically a protection device F1.

7. The agricultural dual-mode conversion lamp circuit according to claim 1, characterized in that: A capacitor module is connected in parallel at both ends of the power supply, and the capacitor module is capacitor C7.

8. An agricultural dual-mode conversion lamp circuit according to claim 1 or 4, characterized in that: The integrated chip U1 is a buck-type LED constant current driver chip.

9. The agricultural dual-mode conversion lamp circuit according to claim 1 or 2, characterized in that: The integrated chip U2 is a switch color temperature controller with a memory function.

10. An agricultural dual-mode conversion lamp circuit according to any one of claims 1 to 5, characterized in that: The integrated chip U2 is provided with a switch signal detection module.

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