CN218998329U - Explosion-proof LED banks control circuit and device and explosion-proof LED banks thereof - Google Patents

Abstract

The utility model discloses an explosion-proof LED control circuit and a device thereof and an LED lamp group, wherein the explosion-proof LED control circuit comprises an LED lamp bead, a rectifier bridge circuit and an LED constant current driving control chip, an alternating current input port of the explosion-proof LED control circuit is connected with an output end of the rectifier bridge circuit in a bridging way, a negative electrode of the LED lamp bead is connected with an output end of the rectifier bridge circuit, a pin of a high-voltage power supply end of the LED constant current driving control chip is connected with a positive electrode of the LED lamp bead, and a pin of a drain electrode of the LED constant current driving control chip is connected with a negative electrode of the LED lamp bead. The utility model adopts the rectifier bridge circuit and the LED constant current driving control chip, can provide stable constant current when controlling the LED lamp group, solves the stroboscopic problem of all LED lamp beads in the circuit by arranging the inductor in the control circuit, avoids arranging the inductor for each LED lamp bead independently, and prevents the frequent charge and discharge of the electrolytic capacitor from shortening the life cycle of the whole product.

Description

Explosion-proof LED banks control circuit and device and explosion-proof LED banks thereof

Technical Field

The utility model relates to a control circuit and a device thereof and an LED lamp set, in particular to an anti-explosion LED lamp set control circuit and a device thereof and an anti-explosion LED lamp set.

Background

The explosion-proof lamp is used in dangerous place where flammable gas and dust exist, and can prevent electric arc, spark and high temperature possibly generated inside the lamp from igniting the flammable gas and dust in the surrounding environment, thereby meeting the explosion-proof requirement, and is also called as an explosion-proof lamp and an explosion-proof illuminating lamp.

LED lighting systems applied in public places such as subway stations, airports, large markets and the like are divided into a linear scheme and a constant current scheme. The linear scheme (without inductance) can be divided into electrolytic capacitor and electroless capacitor, the power supply range is 200-240V, the linear scheme (without electrolytic capacitor) can generate stroboscopic problem in the use process manuscript, therefore, the linear scheme generally adopts the electrolytic capacitor to solve the stroboscopic technical problem, the power factor of the whole lighting system is reduced after the electrolytic capacitor is increased, the loss is increased, the temperature of a power supply line is increased, and the product cannot be explosion-proof, because the life cycle of the whole product is shortened due to frequent charging and discharging of the electrolytic capacitor, each LED lamp strip needs to be increased with the electrolytic capacitor, the production procedure links and materials are increased, the product cost is increased, and the requirements of people cannot be met.

Disclosure of Invention

The utility model aims to provide an explosion-proof LED lamp set control circuit, an explosion-proof LED lamp set control device and an explosion-proof LED lamp set, so that the LED lamp set has an explosion-proof function, an electrolytic capacitor is not used, the power factor can be improved, stable control current can be provided, and the defect existing in the prior art is overcome.

The utility model provides the following scheme:

the utility model provides an explosion-proof LED control circuit, includes the LED lamp pearl, still includes a rectifier bridge circuit and an LED constant current drive control chip, and explosion-proof LED control circuit's alternating current input port cross-over connection is in the output of rectifier bridge circuit, the negative pole of LED lamp pearl links to each other with the output of rectifier bridge circuit, the high voltage power supply end pin of LED constant current drive control chip links to each other with the anodal of LED lamp pearl, and the drain electrode pin of LED constant current drive control chip links to each other with the negative pole of LED lamp pearl.

Further, the rectifier bridge circuit comprises a first diode, a second diode, a third diode and a fourth diode, wherein the anode of the first diode is connected with the cathode of the third diode, the cathode of the first diode is connected with the cathode of the second diode and then is connected with the anode of the LED lamp bead, the cathode of the fourth diode is connected with the anode of the second diode, and the anode of the third diode is connected with the anode of the fourth diode and then is connected with the anode of the LED lamp bead.

Further, the LED lamp further comprises a first capacitor and a second capacitor, wherein the first capacitor is connected across the two ends of the second diode and the fourth diode, and the second capacitor is connected across the two ends of the LED lamp bead.

Further, the LED constant current driving control chip further comprises a first inductor, one end of the first inductor is connected to the negative electrode of the LED lamp bead, and the other end of the first inductor is connected with the drain electrode pin of the LED constant current driving control chip.

Further, the LED constant current driving control circuit also comprises a sampling resistor, wherein one end of the sampling resistor is connected with a current sampling pin of the LED constant current driving control chip, and the other end of the sampling resistor is grounded.

Further, a fuse is installed at an ac input of the explosion-proof LED control circuit.

Further, the LED lamp bead comprises a first LED lamp bead and a second LED lamp bead, the anode of the first LED lamp bead is connected with the output end of the rectifier bridge circuit, the cathode of the first LED lamp bead is connected with the anode of the second LED lamp bead, and the cathode of the second LED lamp bead is connected with the drain electrode pin of the LED constant current driving control chip.

An explosion-proof LED control device is provided with an explosion-proof LED control circuit.

An anti-explosion LED lamp set is provided with an anti-explosion LED control circuit and an anti-explosion LED control device.

Compared with the prior art, the utility model has the following advantages:

according to the LED lamp group control circuit, the rectifier bridge circuit and the LED constant current driving control chip are adopted in the control circuit, stable constant current can be provided when the LED lamp group is controlled, the problem of stroboscopic effect of all LED lamp beads in the circuit is solved by arranging one inductor in the control circuit, the problem that each LED lamp bead is independently provided with the inductor is avoided, and the reduction of the life cycle of the whole product caused by frequent charging and discharging of the electrolytic capacitor is prevented.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic circuit diagram of an explosion-proof LED lamp set control circuit of the present utility model.

Fig. 2 is a schematic block diagram of the explosion-proof LED lamp control device of the present utility model connected to three-phase four-wire industrial electricity.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The circuit schematic diagram of the explosion-proof LED lamp set control circuit shown in fig. 1 comprises an LED lamp bead, and further comprises a rectifier bridge circuit and an LED constant current driving control chip U1, wherein an alternating current input port Ac input of the explosion-proof LED control circuit is bridged at the output end of the rectifier bridge circuit, the negative electrode of the LED lamp bead is connected with the output end of the rectifier bridge circuit, a high-voltage power supply end pin of the LED constant current driving control chip is connected with the positive electrode of the LED lamp bead, and a drain electrode pin of the LED constant current driving control chip is connected with the negative electrode of the LED lamp bead.

The model of the LED constant current driving control chip U1 is SDH771X.

Specifically, the rectifier bridge circuit (rectifier bridge pile D) includes a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4, where the anode of the first diode D1 is connected to the cathode of the third diode D3, the cathode of the first diode D1 is connected to the anode of the LED lamp bead after being connected to the cathode of the second diode D2, the cathode of the fourth diode D4 is connected to the anode of the second diode D2, and the anode of the third diode D3 is connected to the anode of the LED lamp bead after being connected to the cathode of the fourth diode D4.

Specifically, the LED lamp further comprises a first capacitor C1 and a second capacitor C2, wherein the first capacitor C1 is connected across the two ends of the second diode D2 and the fourth diode D4, and the second capacitor C2 is connected across the two ends of the LED lamp bead.

Specifically, the LED constant current driving control chip also comprises a first inductor L1, one end of the first inductor L1 is connected to the negative electrode of the LED lamp bead, and the other end of the first inductor L1 is connected with the drain electrode pin of the LED constant current driving control chip.

Specifically, the LED constant current driving control chip also comprises a sampling resistor RCS, one end of the sampling resistor RCS is connected with a current sampling pin CS of the LED constant current driving control chip U1, and the other end of the sampling resistor RCS is grounded.

Specifically, a fuse is installed at the ac input of the explosion-proof LED control circuit.

Specifically, the LED lamp bead comprises a first LED lamp bead and a second LED lamp bead, the anode of the first LED lamp bead is connected with the output end of the rectifier bridge circuit, the cathode of the first LED lamp bead is connected with the anode of the second LED lamp bead, and the cathode of the second LED lamp bead is connected with the drain electrode pin of the LED constant current driving control chip.

As the implementation of the utility model in a specific application scene, an LED constant current driving control chip U1 with the chip model SDH771X is selected, a high-voltage power supply pin HV of the LED constant current driving control chip U1 is connected to the positive electrode of a first LED lamp bead, a drain electrode pin HV of the LED constant current driving control chip U1 is connected to one end of a first inductor L1, the other end of the first inductor L1 is connected with the negative electrode of a second LED lamp bead, a current sampling pin CS of the LED constant current driving control chip U1 is connected with one end of a sampling resistor RCS, the other end of the sampling resistor RCS is grounded, and a grounding pin of the LED constant current driving control chip U1 is connected with the ground. The circuit structure of the utility model can be seen that the circuit structure of the utility model is simple, the functions of voltage reduction and constant current driving can be realized by only few components, the utility model has quicker response to load transient, has higher rejection ratio to input voltage and has higher working frequency. The utility model can be applied to various fields of construction, industry, environmental illumination, automobile illumination and the like, and has wider application range.

The utility model also discloses a control device corresponding to the explosion-proof LED control circuit and an explosion-proof LED lamp set, wherein the explosion-proof LED control circuit is arranged in the explosion-proof LED control device, the explosion-proof LED control circuit is arranged in the explosion-proof LED lamp set, and the explosion-proof LED control device is arranged in the explosion-proof LED lamp set. According to the LED lamp group control circuit, the rectifier bridge circuit and the LED constant current driving control chip are adopted in the control circuit, stable constant current can be provided when the LED lamp group is controlled, the problem of stroboscopic of all LED lamp beads in the circuit is solved by arranging one inductor in the control circuit, the problem that each LED lamp bead is independently provided with the inductor is avoided, and the reduction of the life cycle of the whole product caused by frequent charging and discharging of the electrolytic capacitor is prevented.

As shown in FIG. 2, the utility model can also be applied to an explosion-proof LED lamp set in urban brightening engineering, and has an explosion-proof function which is not possessed by a common LED lamp set, because in the prior art, the LED lamp set is basically driven by a DC-DC voltage reduction circuit, the high-voltage end of the LED lamp set adopts a single-phase rectification filter circuit, the part of an electrolytic capacitor cannot be avoided, the electrolytic capacitor does not possess the explosion-proof function, and when the LED lamp set is used in huge quantity (the power is more than 5 kilowatts), a power supply circuit can generate strong surge current, so that the power supply circuit abnormally heats, and the hidden danger of fire is caused. The utility model is directly applied to industrial electricity of three-phase four-wire, and is combined with a rectifier bridge circuit in an LED lamp group control circuit to directly convert the alternating current of the three-phase four-wire into smooth direct current. As shown IN the figure, an input switch sw_in is arranged at the inlet end of the three-phase four-wire circuit, a rectifier bridge D and a power inductor L are arranged between an output switch sw_a and an output switch sw_b and between the input switch sw_in, and the power inductor L plays a role IN passive power factor correction. According to the utility model, the electrolytic capacitor can be removed from the LED drive circuit, and then the passive power factor correction device is added to improve the power factor (for example, the power factor can be improved from about 0.5 to about 0.8), so that the LED lamp set has an explosion-proof function, the heating value of an electric wire can be reduced, the safety coefficient of a power grid is improved, and the effects of energy conservation and emission reduction are realized.

The core parts of the utility model are a three-phase rectifier bridge and a power inductor, the principle of the circuit is that three-phase alternating current is converted into relatively smooth direct current through the rectifier bridge (so that the dependence of LED driving on an electrolytic capacitor can be eliminated), then an inductance filter structure is formed through the power inductor, the output current is further smoothed, and the surge current at the moment of power-on can be restrained (the LED driver which still uses the electrolytic capacitor can be compatible). The zero line is connected to divide the output voltage of the rectifier bridge into positive and negative voltage groups, so that the lamp powered by 220 alternating current can be matched. The LED light source is used on a large scale, the power consumption is impossible to use single-phase power, harmonic interference (zero line overheat) and unbalance of three-phase power cannot be avoided by using three-phase power, the problems can be easily solved through the intervention of the control box formed by the LED lamp set control circuit, and the used parts are quite firm and durable, so that the LED light source is an ideal scheme for solving the problem of large-scale LED illumination popularization.

It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that certain terms are used throughout the description and claims to refer to particular elements. It will be appreciated by those of ordinary skill in the art that different manufacturers, manufacturers may refer to a component by different names. The description and claims do not differ by the way in which they distinguish between components, but rather differ by the way in which they function.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example: any of the embodiments claimed in the claims may be used in any combination of the utility model.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

In addition, functional modules in the embodiments of the present utility model may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps. Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise. Like reference numerals refer to like elements throughout the specification.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including the corresponding claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including the corresponding claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (9)

1. The utility model provides an explosion-proof LED control circuit, includes the LED lamp pearl, its characterized in that still includes a rectifier bridge circuit and an LED constant current drive control chip, and the AC input port of explosion-proof LED control circuit is spanned in the output of rectifier bridge circuit, the negative pole of LED lamp pearl links to each other with the output of rectifier bridge circuit, the high voltage power supply end pin of LED constant current drive control chip links to each other with the positive pole of LED lamp pearl, and the drain electrode pin of LED constant current drive control chip links to each other with the negative pole of LED lamp pearl.

2. The explosion-proof LED control circuit of claim 1, wherein the rectifier bridge circuit comprises a first diode, a second diode, a third diode and a fourth diode, wherein the anode of the first diode is connected with the cathode of the third diode, the cathode of the first diode is connected with the cathode of the second diode and then is connected with the anode of the LED lamp bead, the cathode of the fourth diode is connected with the anode of the second diode, and the anode of the third diode is connected with the anode of the fourth diode and then is connected with the anode of the LED lamp bead.

3. The explosion-proof LED control circuit of claim 1, further comprising a first capacitor and a second capacitor, wherein the first capacitor is connected across the second and fourth diodes, and the second capacitor is connected across the LED beads.

4. The explosion-proof LED control circuit of claim 1, further comprising a first inductor, wherein one end of the first inductor is connected to the cathode of the LED lamp bead, and the other end of the first inductor is connected to the drain pin of the LED constant current driving control chip.

5. The explosion-proof LED control circuit of claim 1, further comprising a sampling resistor, wherein one end of the sampling resistor is connected to a current sampling pin of the LED constant current driving control chip, and the other end of the sampling resistor is grounded.

6. The explosion-proof LED control circuit of claim 1, wherein a fuse is mounted at an ac input of the explosion-proof LED control circuit.

7. The explosion-proof LED control circuit according to any one of claims 1 to 6, wherein the LED lamp beads comprise a first LED lamp bead and a second LED lamp bead, the anode of the first LED lamp bead is connected to the output end of the rectifier bridge circuit, the cathode of the first LED lamp bead is connected to the anode of the second LED lamp bead, and the cathode of the second LED lamp bead is connected to the drain pin of the LED constant current driving control chip.

8. An explosion-proof LED control device, characterized in that an explosion-proof LED control circuit according to any one of claims 1 to 6 is provided in the explosion-proof LED control device.

9. An explosion-proof LED lamp set, characterized in that an explosion-proof LED control circuit according to claims 1 to 7 and an explosion-proof LED control device according to claim 8 are provided in the explosion-proof LED lamp set.

Images