CN105744687A - Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp - Google Patents
Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp Download PDFInfo
- Publication number
- CN105744687A CN105744687A CN201610260041.3A CN201610260041A CN105744687A CN 105744687 A CN105744687 A CN 105744687A CN 201610260041 A CN201610260041 A CN 201610260041A CN 105744687 A CN105744687 A CN 105744687A
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- Prior art keywords
- power supply
- constant current
- intrinsicallysafecircuit
- safe type
- switching power
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention provides an intrinsic safety constant current power supply. The intrinsic safety constant current power supply comprises a switching power supply and an intrinsic safety circuit, wherein the intrinsic safety circuit comprises an overcurrent protector, a safety barrier and a constant current circuit which are sequentially connected, the overcurrent protector is connected with the output end of the switching power supply, the output end of the constant current circuit is connected with a load, and the intrinsic safety circuit is arranged in an anti-explosion shell. Stabilized voltage of the switching power supply of the intrinsic safety constant current power supply is output to the overcurrent protector, the current is limited by the overcurrent protector and then is output through the constant current circuit, and electric spark is prevented from being generated by the output due to excessive large voltage and current; and moreover, the intrinsic safety circuit and an outside environment are isolated by the anti-explosion shell, and an explosive and inflammable substance outside the anti-explosion shell cannot be ignited even the electric spark is generated. The invention also provides an intrinsic safety light emitting diode (LED) lamp, a plurality of LED light sources are driven by the intrinsic safety constant current power supply, and the intrinsic safety LED lamp is compatible with the advantages of safety lighting and high-power lighting.
Description
Technical field
The present invention relates to the driving power technique fields of LED, particularly relate to a kind of essential safe type constant current source and essential safe type LED.
Background technology
Explosion-proof lighting lamp is with the advantage such as light efficiency height, life-span length, low consumption safety, energy-conserving and environment-protective, maintenance-free, it is used widely at inflammable and explosive Code in Hazardous Special Locations such as oil exploitation, oil refining, oiling, chemical industry, chemical fertilizer, light industry, food, colliery, gold mine, underground mineral, military project, metallurgy, medicine, weaving, wine brewing, railway, fire-fighting, municipal administration, security personnel, it is ensured that safety in production.
Explosion-proof lighting lamp mainly adopts the type of explosion proof construc tion such as flame-proof type, INCREASEDSAFETY, essential safe type.
Flame-proof type explosion-proof pattern lighting, its shell can be born and do not damaged at internal explosion by the explosive mixture on any composition surface of shell or structure interval entrance enclosure, and will not cause lighting of extraneous explosion gaseous environment.Therefore the structure of luminaire housings faying face of this type of explosion proof construc tion, machined surface require high, structure complexity, and difficulty of processing is high, and cost is high.
INCREASEDSAFETY type of explosion proof construc tion lighting, except having explosion-resistant enclosure, also electrical equipment is taked some addition thereto, to improve its safe coefficient, preventing from producing the probability of dangerous temperature, electric arc and spark under abnormal condition that is properly functioning or that specify, its manufacturing cost is still significantly high.
Inbeing safe explosion prevention pattern is the security reliability type of explosion proof construc tion of lighting, it by internal or be exposed to potential explosive atmosphere connect the issuable electric spark of wire or heat effect energy is limited in the level that can not produce to light.That is: all without producing danger under any condition, explosion prevention function, safety, reliability height, application places is extensive.
If publication number is the Chinese patent of CN102710151A, propose a kind of mining intrinsic safety type Switching Power Supply, including switch transformer, one end of described switch transformer is connected with input filter circuit by full bridge rectifier, the other end is connected with switching tube by output rectifier and filter, voltage stabilizing current-limiting control circuit, and switch transformer is also directly connected with switch.The program can play certain voltage stabilizing, overcurrent protection, but degree of protection is limited.
And due to the inbeing safe explosion prevention safety of pattern requirement own, such energy is just subject to extremely strict restriction, so powerful lighting can not be made, therefore it is badly in need of the high-power explosion-proof light fixture solving to meet inbeing safe explosion prevention requirement, meets the inflammable and explosive Code in Hazardous Special Locations application demands such as oil, petrochemical industry, offshore platform, boats and ships.
Therefore, if the strong intrinsically safe power supply of a kind of security performance can be proposed and can support the safety LED of high-power illumination, the safety in production of the specialities such as oil will there be is vital meaning.
Summary of the invention
The technical problem to be solved is: provides a kind of essential safe type constant current source and a kind of high-power, essential safe type LED, can either improve security performance, be capable of again high-power illumination.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of essential safe type constant current source, including: Switching Power Supply and intrinsicallysafecircuit；Described intrinsicallysafecircuit includes the overcurrent protector, guard grating and the constant-current circuit that are sequentially connected with；Described overcurrent protector connects the outfan of described Switching Power Supply；The outfan of described constant-current circuit connects load；Described intrinsicallysafecircuit is arranged in an explosion-proof casing.
Another technical scheme provided by the invention is:
A kind of essential safe type LED, including essential safe type constant current source and the LED light source that is connected with essential safe type constant current source, described essential safe type constant current source includes: Switching Power Supply and intrinsicallysafecircuit；Described intrinsicallysafecircuit includes the overcurrent protector, guard grating and the constant-current circuit that are sequentially connected with；Described overcurrent protector connects the outfan of described Switching Power Supply；The outfan of described constant-current circuit connects at least two LED light source；Described intrinsicallysafecircuit is arranged in an explosion-proof casing.
The beneficial effects of the present invention is:
(1) the essential safe type constant current source of the present invention, Switching Power Supply output burning voltage, and carry out overcurrent protection through overcurrent protector, it is to avoid high electric current enters next stage circuit；Constant-current circuit is accessed, it is ensured that the essential safety performance of whole circuit again through guard grating；It is load supplying that last constant-current circuit exports stable electric current.The essential safe type constant current source of the present invention, is limited in voltage and current in safe scope, it is to avoid too high voltage and current causes that electric spark produces；And by intrinsicallysafecircuit setting and explosion-proof casing, even if thus electric spark occurs inside explosion-proof casing, also cannot out ignite the flammable and explosive substance outside explosion-proof casing；There is double shield.
(2) the essential safe type LED of the present invention, LED light source is connected with essential safe type constant current source, it is ensured that the voltage and current accessing LED light source will not be excessive, it is possible to effectively prevents too high voltage and current from causing that electric spark produces；The outfan of essential safe type constant current source connects multiple LED light sources, and multiple LED light sources work simultaneously；More than the output two-way of essential safe type constant current source or two-way separate safe current, drives the LED light source group that multichannel is separate, it is achieved high-power illumination.The essential safe type LED of the present invention, meets essential safety and high-power illumination simultaneously, it is possible to be widely used in inflammable and explosive scene.
Accompanying drawing explanation
Fig. 1 is the structural representation of the essential safe type constant current source of the embodiment of the present invention；
Fig. 2 is the structural representation of the essential safe type constant current source of the embodiment of the present invention one；
Fig. 3 is the structural representation of the essential safe type LED of the embodiment of the present invention two；
Fig. 4 is the structural representation of the essential safe type LED of the embodiment of the present invention three；
Fig. 5 is the structural representation of the essential safe type LED of the embodiment of the present invention four.
Label declaration:
1, Switching Power Supply；2, intrinsicallysafecircuit；21, overcurrent protector；22, guard grating；23, constant-current circuit；3, explosion-proof casing.
Detailed description of the invention
By describing the technology contents of the present invention in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained.
The design of most critical of the present invention is in that: setting includes the intrinsicallysafecircuit of the overcurrent protector, guard grating and the constant-current circuit that are sequentially connected with；The output of intrinsicallysafecircuit connects multiple LED light sources.
Refer to Fig. 1, the present invention provides
A kind of essential safe type constant current source, including: Switching Power Supply 1 and intrinsicallysafecircuit 2；Described intrinsicallysafecircuit 2 includes the overcurrent protector 21, guard grating 22 and the constant-current circuit 23 that are sequentially connected with；Described overcurrent protector 21 connects the outfan of described Switching Power Supply 1；The outfan of described constant-current circuit 23 connects load；Described intrinsicallysafecircuit 2 is arranged in an explosion-proof casing 3.
From the above it can be seen that the having the beneficial effects that of essential safe type constant current source of the present invention: the voltage and current of output to load is limited in safety range by intrinsicallysafecircuit 2, from without producing electric spark；And intrinsicallysafecircuit 2 is arranged in explosion-proof casing 3, it is possible to avoid the electric spark produced in explosion-proof casing 3 out to ignite the flammable and explosive substance outside explosion-proof casing 3, there is double shield；Meanwhile, explosion-proof casing 3 also has the effect of heat radiation.
Further, described guard grating 22 is formed in parallel by the Zener diode that two electrical quantitys are identical.
From the above it can be seen that adopt two diodes in parallel as guard grating 22, simple in construction；And the parameter of two diodes is identical, meets international standard, it is adaptable to the product of major part specification, practicality is wide.
Further, described constant-current circuit 23 includes constant current integrated circuit.
From the above it can be seen that the constant current integrated circuit adopting volume little, powerful realizes constant current output, multiple constant-current circuit 23 can be set in limited space as far as possible such that it is able to for more load supplying.
Further, described constant-current circuit 23 includes a current-limiting resistance or the current-limiting resistance of at least two series connection.
From the above it can be seen that adopt current-limiting resistance to realize constant current output, simple in construction, cost is low.
Further, the outfan of described constant-current circuit 23 connects load by wire, and described wire is encapsulated with epoxide-resin glue.
From the above it can be seen that epoxide-resin glue can by wire and external environment isolation, it is to avoid wire ignites extraneous flammable and explosive substance when producing electric spark.
Refer to Fig. 3, another technical scheme of the present invention is:
A kind of essential safe type LED, including essential safe type constant current source and the LED light source that is connected with essential safe type constant current source, described essential safe type constant current source includes: Switching Power Supply and intrinsicallysafecircuit；Described intrinsicallysafecircuit includes the overcurrent protector, guard grating and the constant-current circuit that are sequentially connected with；Described overcurrent protector connects the outfan of described Switching Power Supply；The outfan of described constant-current circuit connects at least two LED light source；Described intrinsicallysafecircuit is arranged in an explosion-proof casing.
Known from the above, having the beneficial effects that of the essential safe type LED of the present invention: the constant-current source after the output pressure limiting of essential safe type constant current source and current limliting is to connecting multiple LED light source, multiple LED light sources work simultaneously, realize emergency lighting and high-power illumination simultaneously.
Further, described Switching Power Supply includes at least two outfan, and each outfan connects a described intrinsicallysafecircuit, and each described intrinsicallysafecircuit connects at least two LED light source.
From the above it can be seen that switching voltage has the output of multichannel independence, the output of every road drives multiple LED light sources to work simultaneously, thus realizing high-power illumination.
Further, described Switching Power Supply includes an isolating transformer and at least two winding, described isolating transformer is connected with described winding respectively, and each winding connects a described intrinsicallysafecircuit, and each described intrinsicallysafecircuit connects at least two LED light source.
From the above it can be seen that switching voltage connects multiple regulated power supplys to multiple intrinsicallysafecircuits by multiple windings, produce multiple-channel output and drive multiple LED light sources to work simultaneously, thus realizing high-power illumination.
Further, the quantity of described Switching Power Supply is at least two, and the outfan of each Switching Power Supply connects a described intrinsicallysafecircuit, and each intrinsicallysafecircuit connects at least two LED light source.
From the above it can be seen that pass through to arrange multiple Switching Power Supply, and each Switching Power Supply connects an intrinsicallysafecircuit and realizes multiple-channel output, finally realizes high-power illumination.
Refer to Fig. 2, embodiments of the invention one are:
A kind of essential safe type constant current source, including Switching Power Supply 1 and intrinsicallysafecircuit 2；Described intrinsicallysafecircuit 2 includes the overcurrent protector 21, guard grating 22 and the constant-current circuit 23 that are sequentially connected with；Described overcurrent protector 21 connects the outfan of described Switching Power Supply 1；The outfan of described constant-current circuit 23 connects load by output lead；Described output lead is encapsulated with epoxide-resin glue；Described Switching Power Supply 1 and intrinsicallysafecircuit 2 are arranged in an explosion-proof casing 3, can fill glue envelope or other materials in explosion-proof casing 3.Concrete, described overcurrent protector 21 is the self-recoverage overcurrent protector of positive temperature coefficient；Described guard grating 22 is semiconductor voltage-stabilizing diode D1 that electrical quantity the is identical and semiconductor voltage-stabilizing diode D2 diode safety barrier composed in parallel；Described constant-current circuit 23 is in series by constant current integration module IC1 and IC2.
Above-mentioned Switching Power Supply 1 may also be arranged on intrinsicallysafecircuit 2 in two different explosion-proof casings, connects by being encapsulated with the wire of epoxide-resin glue.
Above-mentioned constant-current circuit 23 can also by being arbitrarily capable of current limliting, the circuit of constant current output forms, for instance be made up of audion and corresponding build-out resistor；Or it is made up of field effect transistor and corresponding build-out resistor；Or it is made up of current regulator diode circuit and voltage stabilization and current stabilization circuit；Or directly it is in series by a current-limiting resistance or multiple current-limiting resistance.
Refer to Fig. 2, embodiments of the invention two are:
A kind of essential safe type LED, including essential safe type constant current source and multiple LED light source of above-described embodiment one, described essential safe type constant current source is connected with multiple LED light sources.
Refer to Fig. 3, embodiments of the invention three are:
A kind of essential safe type LED, including essential safe type constant current source and LED light source；Described essential safe type constant-current circuit includes the self-recoverage overcurrent protector of positive temperature coefficient, diode safety barrier and the constant current integrated circuit that are sequentially connected with, and described constant current integrated circuit is made up of multiple constant current integration modules (IC1, IC2, IC2, IC3, IC4, IC5, IC6)；Described constant-current circuit is that described Switching Power Supply includes multiple outfan, and described intrinsicallysafecircuit is also multiple, and the one group of LED group being made up of multiple LED light sources that is driven to that each outfan of Switching Power Supply forms a road independence with circuit below is powered；Concrete, the outfan of each Switching Power Supply connects the self-recoverage overcurrent protector of the positive temperature coefficient of an intrinsicallysafecircuit by wire；The self-recoverage overcurrent protector of each positive temperature coefficient connects the constant current integration module (as connected constant current integration module IC1 and the IC2 of series connection after Fig. 3 Zener diode D1 and Zener diode D2 diode safety barrier composed in parallel) of two series connection by a guard grating, and the output of constant current integration module connects multiple LED light source again.Wherein, described Switching Power Supply had the safety protection functions such as stream, overvoltage, excess temperature, short circuit, open circuit, and had anti-lightning strike, capacity of resisting disturbance；Electric clearance between the intrinsicallysafecircuit of every road, insulating safety distances, reptile distance arrange and meet the requirement that international standard specifies；Switching Power Supply and intrinsicallysafecircuit are arranged in an explosion-proof casing；It is in the connection wire outside explosion-proof casing and is all encapsulated with epoxide-resin glue.
In a preferred embodiment, Switching Power Supply includes an isolating transformer with multiple secondary windings, and each independent secondary windings connects a road intrinsicallysafecircuit, as shown in Figure 4.The insulation of described isolating transformer meets national standard requirement.
The operation principle of the essential safe type LED of above-described embodiment two is as follows:
Switching Power Supply exports the stable voltage self-recoverage overcurrent protector to positive temperature coefficient；When circuit is in normal operating conditions, namely flowing through the electric current of self-recoverage overcurrent protector of this positive temperature coefficient less than its maximum non-operating current, the self-recoverage overcurrent protector of described positive temperature coefficient is in low resistance state, does not affect the normal operation of intrinsicallysafecircuit；When occurring that electric current is excessive or during abnormal conditions, the overcurrent protector of described positive temperature coefficient presents rapidly high-impedance state, it is to avoid excessive current enters next stage circuit；Normal electric current enters constant-current circuit through diode safety barrier, and when inputting the change of the fluctuation of DC voltage of constant-current circuit or load voltage, constant-current circuit is exportable stable circuit also, drives LED light source to light.
Refer to Fig. 5, embodiments of the invention three are:
A kind of essential safe type LED, including essential safe type constant current source and LED light source；Described essential safe type constant current source includes 3 Switching Power Supplies, 3 diode safety barriers and 3 current-limiting resistances, each Switching Power Supply connects a diode safety barrier, each diode safety barrier anode connects a current-limiting resistance again, forming the driving of three tunnel independences, every road drives and connects multiple LED light source again.
Above-mentioned Switching Power Supply, diode safety barrier, current-limiting resistance quantity be not limited only to 3, the present embodiment is by way of example only.
In sum, essential safe type constant current source provided by the invention, the output of Switching Power Supply is load supplying through overcurrent protector current limliting and the constant-current circuit stable current limit of output of intrinsicallysafecircuit, it is to avoid the excessive generation electric spark of voltage and current of output；And Switching Power Supply and essential safety are protected circuit arrange and in an explosion-proof casing, electric spark occurs without the flammable and explosive substance ignited outside explosion-proof casing in instant explosion-proof casing, there is double shield.The essential safe type LED of the present invention, by arranging the separate Switching Power Supply output of multichannel and intrinsicallysafecircuit, the LED light source that is driven to that formation multichannel is independent of each other is powered, the advantage having emergency lighting and high-power illumination concurrently.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing description of the present invention and accompanying drawing content to make, or directly or indirectly it is used in relevant technical field, all in like manner include in the scope of patent protection of the present invention.
Claims (9)
1. an essential safe type constant current source, it is characterised in that including: Switching Power Supply and intrinsicallysafecircuit；Described intrinsicallysafecircuit includes the overcurrent protector, guard grating and the constant-current circuit that are sequentially connected with；Described overcurrent protector connects the outfan of described Switching Power Supply；The outfan of described constant-current circuit connects load；Described intrinsicallysafecircuit is arranged in an explosion-proof casing.
2. essential safe type constant current source according to claim 1, it is characterised in that described guard grating is formed in parallel by the Zener diode that two electrical quantitys are identical.
3. essential safe type constant current source according to claim 1, it is characterised in that described constant-current circuit includes constant current integrated circuit.
4. essential safe type constant current source according to claim 1, it is characterised in that described constant-current circuit includes a current-limiting resistance or the current-limiting resistance of at least two series connection.
5. essential safe type constant current source according to claim 1, it is characterised in that the outfan of described constant-current circuit connects load by wire, and described wire is encapsulated with epoxide-resin glue.
6. an essential safe type LED, it is characterised in that including essential safe type constant current source and the LED light source being connected with essential safe type constant current source, described essential safe type constant current source includes: Switching Power Supply and intrinsicallysafecircuit；Described intrinsicallysafecircuit includes the overcurrent protector, guard grating and the constant-current circuit that are sequentially connected with；Described overcurrent protector connects the outfan of described Switching Power Supply；The outfan of described constant-current circuit connects at least two LED light source；Described intrinsicallysafecircuit is arranged in an explosion-proof casing.
7. essential safe type LED according to claim 6, it is characterised in that described Switching Power Supply includes at least two outfan, each outfan connects a described intrinsicallysafecircuit, and each described intrinsicallysafecircuit connects at least two LED light source.
8. essential safe type LED according to claim 6, it is characterized in that, described Switching Power Supply includes an isolating transformer and at least two winding, described isolating transformer is connected with described winding respectively, each winding connects a described intrinsicallysafecircuit, and each described intrinsicallysafecircuit connects at least two LED light source.
9. essential safe type LED according to claim 6, it is characterised in that the quantity of described Switching Power Supply is at least two, the outfan of each Switching Power Supply connects a described intrinsicallysafecircuit, and each intrinsicallysafecircuit connects at least two LED light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610260041.3A CN105744687A (en) | 2016-04-25 | 2016-04-25 | Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610260041.3A CN105744687A (en) | 2016-04-25 | 2016-04-25 | Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp |
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| CN105744687A true CN105744687A (en) | 2016-07-06 |
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| CN201610260041.3A Pending CN105744687A (en) | 2016-04-25 | 2016-04-25 | Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106200711A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of heating temperature control circuit matching servo packing machine circuit |
| CN109348565A (en) * | 2018-05-14 | 2019-02-15 | 梁爽 | A kind of encapsulation intrinsic safety type safety cap lamp |
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| CN204650108U (en) * | 2015-05-12 | 2015-09-16 | 丁国军 | Hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp |
| CN205657878U (en) * | 2016-04-25 | 2016-10-19 | 中山天外天防爆照明有限公司 | Safe type constant current power supply of essence and essential safe type LED lamp |
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| CN2904552Y (en) * | 2006-03-31 | 2007-05-23 | 淮南市启迪电子有限公司 | Explosion isolation safety LED coalmine illuminating lamp |
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| CN109348565A (en) * | 2018-05-14 | 2019-02-15 | 梁爽 | A kind of encapsulation intrinsic safety type safety cap lamp |
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