CN203744175U - High-power flat fluorescent lamp for outdoor lighting - Google Patents

Abstract

The utility model discloses a high-power flat fluorescent lamp for outdoor lighting. The lamp is mainly composed of a ballast, a lamp tube, a lamp body and mounting frames, the ballast is wholly packaged in a glue pouring mode, a field effect audion, an induction differential mode inductor and an output isolation transformer are used in a circuit, and the comprehensive performance of the ballast is obviously superior to that of a ballast of a traditional fluorescent lamp. The fluorescent lamp of a U-type flat grid structure is adopted by the lamp tube, the appearance of the lamp is designed to be a style similar to a mobile phone and a flat computer, and the rainwater preventing function is achieved. The ballast is arranged on a lamp outer chamber, the ballast, the lamp tube, the lamp body and the lower mounting frame are fixed through screws to form a lighting device body, the body is shown as a rigid whole part, the components are detachable, and the upper mounting frame is an accessory. The device is small in size, light, novel in structure, attractive, high in power, long in service life, safe and reliable in use, high in cost performance, capable of being widely applied to outdoor lighting fields of roads, places and the like and capable of being further widely applied to large indoor lighting places.

Description

A kind of outdoor lighting high-power flat fluorescent lamp

Technical field

The present invention relates to lighting field, be between version to conventional fluorescent fluorescent tube, supporting electric ballast, light fixture and three the one in system collocation comprehensively improve, innovation and perfect, make it combination property and more can meet a kind of utility unit of outdoor lighting application demand.

Background technology

In room lighting field, it is undisputable fact that fluorescent lamp occupies overlord's light source status, but in outdoor lighting field, HID light source (sodium vapor lamp, Metal halogen lamp) almost rules all the land; And in applications such as traffic lights, large-scale advertisement display screen, urban architecture nightscape lightings, LED lamp is leading, the figure of fluorescent lamp seldom can be seen in these fields, is an objective fact equally.

Fluorescent lamp is undoubtedly one of energy-saving light source, and in recent years, country advocates energetically and encourages people to use electricity-saving lamp (self-ballasted fluorescent lamp) is exactly an illustration.Compared with other two kinds of light sources (HID, LED), fluorescent lamp has unarguable advantage at the aspect such as uniformity and mildness and price of colour rendering index, illumination; In addition,, in the middle of three large energy-saving light sources, the colour temperature kind of fluorescent lamp is the abundantest (2700K-7000K), more can meet the different requirements of various occasions to colour temperature; Moreover the ratio of fluorescent lamp adapted electric ballast is far away higher than HID light source, relatively favourable to improving grid power factor, therefore, fluorescent lamp ought to be accomplished something in outdoor lighting field.But up to now, in objective fact, fluorescent lamp can not obtain due development in this field, this have to be regrettable.

On the one hand, as outdoor lighting, because space is relatively spacious, light source should have larger power and luminous flux; Secondly, lighting device should be able to rainproof waterproof; In addition,, because environment for use is severe, comparatively speaking, the quality to product, security performance, reliability requirements are higher.On the other hand, the comprehensive restriction of prior art aspect, makes fluorescence lamp lighting device aspect lamp tube structure form, ballast combination property and the never innovation and breaking through of the aspect such as the system collocation of fluorescent tube, ballast, light fixture.The reason of above two aspects combines, and makes existing various fluorescence lamp lighting device exist many defects that are unfavorable for outdoor lighting, to such an extent as to existing product pattern is all the time in being extremely unfavorable under the situation of outdoor lighting application.

In order to change this present situation, the present invention has carried out comprehensive improvement and innovation to existing fluorescence lamp lighting device.For the ease of the understanding to correlation technique behave, be necessary that technological deficiency and problem that existing fluorescence lamp lighting device is existed do objective analysis, due to the technological deficiency that will analyze, to relate to content more, and for simplicity, correlation analysis divides two parts to launch.

One, there is defect in conventional electronic ballast

Almost 100% adapted electric ballast of fluorescent lamp now, except the special applications such as light modulation, low-voltage DC supply requires, the traditional circuit shown in the common employing Fig. 1 without exception of more than 95% electric ballast in the market.The ballast volume of this circuit production is little, lightweight, price is low, proper with fluorescent tube matching and debugging, and the indexs such as its life-span, reliability, under indoor environment for use, can meet instructions for use completely, and cost performance is high.Just because of this, Fig. 1 circuit is regarded as classical popular scheme and is adopted by most producer.But for outdoor lighting, environment for use is badly many, it is harsh many that instructions for use is also wanted, if still continue to use this conventional electronic ballast, is in fact difficult to meet its instructions for use.

Compared with room lighting, the ballast that is applied to outdoor lighting at least following have more specifically aspect several require:

1, under outdoor occasion, wind, Exposure to Sunlight, drench with rain customaryly, winter temperature is unrare lower than-20 DEG C; The situation of summer temperature up to+40 DEG C is also of common occurrence, therefore, requires the ballast can high-and low-temperature resistance, again can sand-proof, drench with rain.

2, the current power for the reliable electronic ballast for fluoresent lamp of room lighting comparative maturity is substantially below 40W, although there is the product of relatively high power to exist on market, but the actual peak power output of single ballast is no more than 85W conventionally, and these so-called high-power products in fact, its reliability and life-span are also obviously not as good as the small-power product below 40W.And outdoor lighting power demand often reaches hundreds of watts, at least also want hectowatt magnitude; And conventionally all more than 10 hours, therefore, require ballast to have larger power output, longer service life and the reliability of Geng Gao continuous service time of every day.

1. the actual peak power output of single ballast is relevant with the caliber of joined fluorescent tube, and said 85W is for T5 caliber here, T2 if, and peak power output is no more than 25W conventionally.

2. the actual power of high-power fluorescent lamp only accounts for the 7-8 folding of nominal power conventionally, and this way has in fact become convention in the industry, and therefore, actual power is larger with nominal power phase difference.Here said 85W refers to actual power, but not nominal power.

3, for miniwatt energy-saving lamp; the price of high-power energy-saving lamp is obviously high; therefore; when fluorescent tube leaks air, squib or life-span end and after losing efficacy; ballast should not damage, and should make it continue normal work by changing fluorescent tube, for this reason; require ballast should there is basic defencive function, at least should possess open circuit, short-circuit protection function.In addition,, after changing the fluorescent tube of different manufacturers or different batches, should still can guarantee that the matching properties of ballast and fluorescent tube is unaffected.

4, in installation, maintenance process, convenient operation, meanwhile, in order ensuring personal safety, should to there is corresponding safety protection function.

Below in conjunction with these particular/special requirements, why can there is shortcoming if continue to use this traditional ballast for outdoor lighting, do further concrete analysis:

(1) can find out referring to Fig. 1, it is the principle of utilizing L, C series resonance that this kind of circuit implemented to start to fluorescent tube.Before starting, fluorescent tube is in open-circuit condition (capacity >>C9, the C10 of C7, L3 inductance value >>L2-3), L3 and C9//C10 form series resonance, the electric current that makes to flow through C9//C10, L3 is very large, so produce a very high voltage at C9//C10 bis-ends, thereby fluorescent tube started.After fluorescent tube starts, the voltage of C9//C10 bis-ends quickly falls to the pipe pressure value UD(of fluorescent tube arc discharge conventionally between 80-150 volt), make L3, the off resonance of C9//C10 series circuit, electric current declines to a great extent, so circuit enters normal duty.The time that this process maintains is very short, conventionally within several seconds, completes.

From the above analysis, the normal work of this circuit is to be based upon on the prerequisite that fluorescent tube do not allow long period open circuit, one there is chronic leakage, squib, loose contact and opens a way when fluorescent tube, or because aging, life-span close on end of a period, cause tube voltage to rise a lot and be difficult to start, all will cause start-up circuit always in series resonance state, the electric current that flows through L3, C9//C10 will be always very large, like this however how long, ballast must be gone bad undoubtedly; In addition, can be seen by Fig. 1, this circuit itself is without any open circuit protecting function, and this is undoubtedly a major defect for outdoor lighting.

(2), for Fig. 1 circuit, under normal operating conditions, the output current that flows through C9//C10, L3 should be

Io≈(Uo－U _D)／2πf?L， ┈┈①

In the time there is short circuit in load, UD=0, the short circuit current that flows through C9//C10, L3 should be

I _D≈U _O／2πf?L， ┈┈②

Here U, _ofor the output voltage of inverter, the operating frequency that f is inverter, U _dpress for fluorescent tube pipe, L is L3 inductance value.

Obviously, short circuit current can increase to some extent undoubtedly compared with running current, what degree does is problem to increase on earth?

Can use (I _d-Io) with Io recently reflect short circuit time load current increase multiple (with respect to Io): by formula 1., be 2. not difficult release

（I _D－Io）／Io=U _D／（U _O－U _D），

Set U _d/ U _o=K, so have

（I _D－Io）／Io=K／（1－K）， ┈┈③

3. can be found out by formula: the multiple that when short circuit, load current increases is directly proportional to K, namely with U _d/ U _ovalue is directly proportional, U _d/ U _obe worth greatlyr, the multiple that when short circuit, load current increases is just larger.

According to correlation theory, in order to ensure stable ballast characteristic, U _d/ U _ovalue is definitely less than 0.76, conventionally U _d/ U _ovalue should be no more than 0.56 and be advisable.But for Fig. 1 circuit, on the one hand, because the supply voltage Shi You city net 220V alternating voltage of inverter directly provides after over commutation, filtering, this has just determined the output voltage U of inverter _ovirtual value maximum also can only (calculate with peak value 308V square wave) in about 220V; On the other hand, pipe pressure UD is proportional to the length of fluorescent tube, is inversely proportional to the caliber of fluorescent tube, and outdoor lighting requires power to mean that compared with the Nature fluorescent tube is long, U _dbe worth highlyer, the reason of above two aspects makes U _dwith U _oratio can not littlely to which go.In fact, be greater than the T5 fluorescent tube of 85W and T2 fluorescent tube that power is greater than 25W as example taking power, U _d/ U _ovalue all will approach or exceed 0.6.

Even if U _d/ U _ovalue=0.6, is 1. not difficult to calculate by formula, and short circuit current will reach 2.5 times of running current, and obviously, long-time short circuit is very unfavorable to the reliability of circuit.

At least illustrate by above analysis: for Fig. 1 circuit, power is larger, pipe is pressed higher, U _dwith U _oratio is just larger, and the multiple that short circuit current increases is just larger, thereby more should not occur long short-circuit state; In addition, as seen from Figure 1, this circuit does not have any short-circuit protection function equally, and this can't but be a major defect for outdoor lighting.

(3) be it can also be seen that by Fig. 1, this circuit is a kind of typical " hot plate " circuit.So-called " hot plate " circuit refers between electricity consumption duplexure and urban network electricity source and do not pass through electrical isolation, make to exist between electricity consumption loop and power supply contacting of direct electricity, thereby over the ground, is " charged " all the time., as long as element, the output line etc. in its electricity consumption loop exist exposed or damaged possibility, just certainly will there is possible electric shock risk in sort circuit.

For integrated energy-saving lamp, because all circuit parts (comprising output line) are all placed in working of plastics, so this problem perhaps can not considered.But for outdoor lighting, if adopt integral structure mode, it is unfavorable to bring to Design of Luminaires, and adopts Split type structure mode certainly will have electric shock risk.

(4) also there is an open defect in circuit shown in Fig. 1:

If provide the producer of supporting fluorescent tube to change, or the fluorescent tube production batch difference that provides of same supporting producer, all to re-start comprehensive matching adjustment to ballast and fluorescent tube, this adjustment process is not only very important, and relatively complicated.

The final purpose of adjusting is to meet under the prerequisite of rated power index, make ballast under different cities net input voltages (low voltage, normal pressure, high voltage) and different temperatures (low temperature, normal temperature, high temperature) condition, guarantee all smaller and comparison balances of temperature rise of its loss and triode, otherwise life and reliability cannot be guaranteed.Relevant this point, engineer has an intimate knowledge invariably in the industry.

On the one hand, the fluorescent tube of different manufacturers, different batches, pipe is pressed and conventionally can be there are differences, and meets the required electric current of equal-wattage naturally different; On the other hand, different pipes is pressed, and the electric current that flows through C9, C10 can change to some extent, but also can exert an influence to the operating frequency of whole circuit; In addition, the common triode using in circuit under different output current, different input voltage, different temperatures, its U _bEvalue and foment thereof all can change, and all these change, and the perfect condition while causing unavoidably original dispatching from the factory is destroyed, and therefore must re-start comprehensive adjustment.Because this adjustment and R3, R4, R5, R6, C4, C9, C10, L2 turn ratio, L3 inductance value etc. have relation, and mutual association, pull one hair and move the whole body, therefore adjustment process is quite complicated.

With regard to outdoor lighting, when fluorescent tube leaks air, when the situation such as squib or life-span end of a period, ballast should not damage, and should make it continue normal work by changing fluorescent tube, and after changing the fluorescent tube of different manufacturers or different batches, still can guarantee that the overall characteristic of ballast is unaffected.Because this type of ballast must re-start comprehensive adjustment in the time changing fluorescent tube, and adjustment process is quite complicated, and non-specialized-technical absolutely not personnel can be competent at, and therefore, in outdoor lighting actual application, not have operability.

(5) due to cost factor, the L1 shown in Fig. 1 in circuit scarcely can be used, even if adopt, due to the restriction of the factors such as heating, volume, inductance value is often less than normal; On the other hand, because L1 is operated under power frequency 50Hz condition, Comparatively speaking, the induction reactance of L1 is also obviously less than normal, and the effect that suppresses electric current is very limited, and therefore, this circuit still belongs to voltage source type inverter in essence.

According to correlation theory, the voltage ratio that voltage source inverter bears while startup is higher, and transient current when startup than the large 5-10 of running current doubly; Voltage source inverter also obviously not as good as current source inverter, when power is larger, adopts voltage source type inverter scheme especially not too suitable to the fault adaptive capacity of load short circuits and open circuit, wants to carry out quite difficulty.

(6) with regard to single fluorescent lamp, power is larger, and the length of fluorescent tube is just longer, and pipe is pressed U _djust higher.U _dhigher, flowing through the heater current of C9 and flow through the branch current of C10 will be larger, and this electric current does not have any contribution for lamp luminescence power, bring more loss only can to whole ballast.Moreover, more seriously, at the low side (180V left and right) of input voltage, can decline to some extent during than normal input voltage due to lamp current, this will cause again fluorescent tube pipe to press further rise (due to the negative resistance charactertistic of fluorescent tube), and then making the temperature rise of circuit loss and triode too much and very easily depart from place of safety, the reliability of circuit can obviously decline.

Judge that the effective method of Fig. 1 circuit reliability is exactly to observe the loss of its circuit and the temperature rise of triode, and to this binomial Index Influence the most directly, the most responsive factor is no more than U _d.U _dwhen higher, wish is adjusted to this binomial index the poised state of relative ideal, difficulty that can be abnormal.In fact, this has become insider's widespread consensus, and so-called pipe is pressed high easily " plate bursting " in the industry, and the electricity-saving lamp power of T2 series fluorescent tube does not quite, etc. these sayings invariably relevant therewith.This also just why the reliability of high-power energy-saving lamp and life-span obviously not as good as a very important former therefore place of miniwatt energy-saving lamp.

(7), under indoor conditions, the excursion of environment temperature is conventionally relatively little; In addition, no matter be Frame lamp or electricity-saving lamp, due to without rainwater-proof, its ballast casing is all provided with passage, and this is conducive to heat radiation naturally, and this two service lifes for ballast and reliability are all favorable factor undoubtedly.But under outdoor application condition, sand-proof, to drench with rain be necessary, environment for use degenerates also inevitable.

In order to adapt to this variation and the demand of outdoor lighting, in the collocation of ballast and light fixture, only have two kinds of selections:

The one, retain ballast casing passage mode constant, ballast entirety is placed in to the light fixture of sealing.Although this kind of problem that way can solve sand-proof, drench with rain can be brought two problems: on the one hand, therefore and to some extent the volume of light fixture has to increase (defect of related structure, volume, profile aspect is separately discussed); On the other hand, ballast, in narrow space, adds the impact of fluorescent tube heating, and radiating effect certainly will be poor.In addition the unfavorable factor that, change range of outdoor environmental temperature is larger still exists.

Another kind of selection is that ballast is placed in outside light fixture, and the precondition of this way is ballast to be done separately to totally-enclosed rainwater-proof processing.Obviously, in the situation that not taking special measure, this totally-enclosed mode is very unfavorable undoubtedly for the heat radiation of ballast.In addition the unfavorable factor that, change range of outdoor environmental temperature is larger equally still exists.

As can be seen here, no matter do which kind of selection, the adverse effect that all cannot avoid large these two factors of weak heat-dissipating and variation of ambient temperature, this life-span for traditional ballast, reliability and power ability to pay are all a kind of negative challenge undoubtedly, thereby we must be considered as a kind of shortcoming it.

Two, there is defect at aspects such as volume, structure, profiles in existing fluorescence lamp lighting device

As outdoor lighting, whether the rainproof water-proof function of its lighting device, volume, structure, profile, installation and maintenance be convenient etc. is all the very important index of considering.Only, with regard to these indexs, obviously, under the prerequisite with rainproof water-proof function, the volume of lighting device should be not excessive, and profile should be too not clumsy, and should be convenient to installation and maintenance.But, for various reasons, in existing fluorescence lamp lighting device, do not have which kind of lighting device to accomplish relatively perfectly to unify aspect several above simultaneously.

The traditional structure form of existing fluorescent lamp tube with straight pipe type, cylindrical helical type, column is U-shaped or column lotus-shaped flower is the most common.

Straight pipe type is made Frame lamp conventionally, and the larger fluorescent tube of power is inevitable longer, and only, from waterproof, the aspect such as attractive in appearance, it is obviously improper that this type of lamp makees outdoor lighting.

U-shaped or column lotus-shaped flower the being made of one self-ballasted fluorescent lamp together with ballast conventionally of cylindrical helical type, column, the what is called " electricity-saving lamp " that namely people are familiar with very much.This version can be said almost Perfect for room lighting, but, if for outdoor lighting, owing to requiring power larger, volume potential must be larger, and such volume, such column structure consider from attractive in appearance, waterproof, secondary light-distribution equal angles, make the design of light fixture become very difficulty, think perfect almost impossible.However,, in some occasion, still can see once in a while that people directly install this kind of electricity-saving lamp and come for outdoor lighting in original HID light fixture.Because the ballast of electricity-saving lamp is together with integrated mode is done with fluorescent tube, shape is relatively bigger than normal, partially long, this just brings two problems: on the one hand, the electricity-saving lamp that the space of original HID light fixture can hold, only tens watts at most of its corresponding power, this may not meet the demand of outdoor lighting to brightness; On the other hand, because electric ballast and lamp one are in together in airtight light fixture, fluorescent tube heating nature makes the environment temperature of ballast higher, this must cause its life-span, reliability to be had a greatly reduced quality, therefore, in fact strict, this way is a kind of selection of having no way out, and is also professional, the extremely not irregular way of a kind of utmost point.

In the last few years, can also be at the fluorescent tube that is commercially available a kind of so-called " slab construction ", this class fluorescent tube mainly occurs with three kinds of forms at present: serpentine configuration, loop configuration and U-shaped grid structure.

At present, the lighting device of being made by this class fluorescent tube is applied to room lighting occasion with kitchen tools embedded mode or suction top mode conventionally.Due to embedded mode or inhale top mode and be conducive to hiding of ballast, in addition less in power, volume is little, and without waterproof, therefore aspect structure and moulding thereof aesthetic, have reasonable visual effect.But under outdoor lighting condition, this disposal skill is obviously lack scope for their abilities.

In addition, also have the floodlight of the U-shaped grid structure fluorescent tube of a kind of special use on market, this lighting device power is relatively large, and can rainproof waterproof.But, due to aspects such as ballasts, the volume of this lighting device is still obviously bigger than normal, moulding is relatively clumsy, and mounting means underaction is convenient, thereby, the scope of application is subject to larger restriction, only just can see their figure in floodlighting minority particular application.

Above As-Is analysis fully shows, from the angle of outdoor lighting, existing various fluorescence lamp lighting devices are difficult to accomplish relatively perfectly to unify at aspects such as volume, structure, profile, rainproof water-proof function, installation and maintenance really.Why like this, with the combination property of existing ballast, three factors of fitting structure design that between the version of fluorescent tube and ballast, fluorescent tube, light fixture three, collocation relation determines are relevant.Mutual association between three factors, restriction mutually, affect each other the other side, the final comprehensive present situation of one that forms, this comprehensive present situation is determining the combination property of existing fluorescence lamp lighting device at aspects such as volume, structure, profile, rainproof water-proof function, installation and maintenance.Because three factors are subject to the comprehensive restriction of prior art, make existing various fluorescence lamp lighting device being difficult to accomplish balance aspect above combination property and taking into account, always there is such or such defect.

Below to causing the main cause of these defects to do following concrete analysis:

(1) there is restriction in fitting structure design arrangement aspect

Still adapted conventional electronic ballast of existing various fluorescent lamp, because this ballast itself does not have rainproof water-proof function, in order to reach the object of rainproof waterproof, within having to that ballast and fluorescent tube are all placed in to light fixture, this must increase the interior space of light fixture; In addition, in order to reduce as far as possible the fluorescent tube adverse effect causing of generating heat, when design lamps, also must do isolation processing to fluorescent tube and ballast, this further increases the volume that causes light fixture again to some extent, therefore, this a kind of fitting structure design of having no way out of adopting because of the present circumstance arranges to cause beyond doubt lighting device volume obviously bigger than normal, one of most important reason that moulding is relatively clumsy.

(2) single the problem that ballast power fan-out capability deficiency is brought

As outdoor lighting, light source should have larger power and luminous flux,, and with regard to traditional ballast, the power output of single ballast is subject to larger restriction, so, can only realize by increasing the group number of fluorescent tube and the number of ballast the requirement of relatively high power, due within ballast is placed in light fixture, ballast number is more, the volume of light fixture is just larger, and this is obviously to cause lighting device volume bigger than normal, another major reason that moulding is relatively clumsy.

(3) problem that the aspect such as the version of existing fluorescent tube, combination, light efficiency exists

It is improper that interior illuminator is selected straight pipe type, cylindrical helical type, what the U-shaped class fluorescent tube of column do not have, but for outdoor illumination, select the fluorescent tube of this class formation form very unfavorable to the design of light fixture, attractive in appearance, waterproof etc., this point is the apparent fact.The fluorescent tube of selecting U-shaped grid structure in the middle of the fluorescent tube of existing various versions is perhaps more rational option, and comparatively speaking, the version of this being similar to " flat board " seems to have more imagination space, and it at least can make enough thin of the thickness of light fixture.But, only select the fluorescent tube of existing U-shaped grid structure still unsatisfactory, this be because: on the one hand, the larger fluorescent tube of power is naturally longer, and fluorescent tube cross long tube press certainly will be too high, because the restriction ratio that traditional ballast is pressed pipe is harsher, use single fluorescent tube, power does not quite, can not meet the power demand of outdoor lighting, and power can satisfy the demands, the quantity of ballast and fluorescent tube must increase simultaneously, and the volume of light fixture will increase exponentially again unavoidably; On the other hand, due to the needs of rainproof waterproof, outdoor illumination belongs to " band cover lamp " in essence, and power is larger, lamp temperatures is higher, and this not only can make traditional cold junction technical failure, use the effect of amalgam also will have a greatly reduced quality, the fluorescent tube of simply applying mechanically existing U-shaped grid structure will cause fluorescent tube light efficiency significantly to decline, and therefore, the problem of the aspects such as the version of fluorescent tube, combination and light efficiency is all to cause existing fluorescence lamp lighting device to be unfavorable for the major reason of outdoor lighting.

So far, existing defect and existing fluorescence lamp lighting device to exist defect to have comparatively comprehensively at aspects such as volume, structure, profiles to traditional ballast understands.Should say, just because of there are these defects, just cause fluorescent lamp existing product pattern all the time in being extremely unfavorable under the situation of outdoor lighting application; Also just because of there are these defects, fluorescent lamp just fails to accomplish something in outdoor lighting field always.Therefore, conventional fluorescent lamp ballast is implemented to improvement and bring new ideas; The aspect such as version, combination to fluorescent tube is carried out perfect; On this basis the design of light fixture is made every effort to novel, attractive in appearance; And innovation to some extent in the system collocation between three, make its combination property more press close to the application needs of outdoor lighting, for the present situation that changes existing outdoor lighting field, make this relatively ancient energy-saving light source of fluorescent lamp obtain due development, be of great practical significance undoubtedly.This is particular problem to be solved by this invention just also.

Summary of the invention

The object of the invention is to provide a kind of high-power flat fluorescence lamp lighting device, this device can effectively overcome the defect of existing fluorescence lamp lighting device in system collocation between fluorescent tube, ballast, light fixture and three, makes fluorescent lamp be widely used in outdoor lighting field and becomes a reality.

In order to achieve the above object, the technical solution used in the present invention is: a kind of outdoor lighting high-power flat fluorescent lamp, formed by ballast, fluorescent tube, light fixture, installing rack, it is characterized in that: the encapsulation of described ballast entirety encapsulating, has rainwater-proof function alone; Between the input rectifying filter circuit of described ballast and half-bridge inversion circuit, insert a differential mode inductance L2, make half-bridge inversion circuit become current mode half-bridge inverter; The output circuit of described ballast adopts the isolating transformer T1 coupling way of output, makes the electric mutual isolation of main circuit and output loading; Described fluorescent tube adopts the fluorescent lamp of U-shaped grid structure; Described light fixture is rainproof planar lamp; The input line of described ballast is connected with power line, and output line is connected with the filament of described fluorescent tube; Described ballast is installed on the mistress of described light fixture, and described fluorescent tube is installed on the interior chamber of described light fixture; Described ballast, fluorescent tube, light fixture, the each parts of installing rack are fixedly connected with, and are combined into a complete lighting device.

Above-mentioned plane fluorescent lamp, it is further characterized in that: in described current mode half-bridge inverter, adopt fet; Described fluorescent tube is the fluorescent tube of U-shaped grid structure that a synthetic N U-shaped light tube group two dimensional surface is distributed, then with electricity-saving lamp glue, one or two fluorescent tubes is fixed on a plastic base, forms one group of lamp tube unit; Described fluorescent tube uses stainless steel jump ring to clamp, and in two of one end semicircle of described jump ring, through substantially equating with the external diameter of described fluorescent tube, the other end of described jump ring is fixed by screw and lamp base; Described Design of Luminaires becomes to be similar to the pattern of " mobile phone " and " panel computer "; Described light fixture is made up of lamp casing, transparent glass, sealing ring, gland; Described installing rack is made up of two parts, upper installing rack and lower installing rack, and lower installing rack and light fixture are fixed, and upper installing rack and supporter are fixed; The input line of described ballast realizes detachable waterproof with urban network electricity source line by two power line special-purpose water-proof joints and is connected, output line is realized plug by one group of waterproof banana plug with the waterproof banana bin on light fixture and is connected, and banana bin is connected with the tube filament in light fixture; Described ballast, fluorescent tube, light fixture are fixed by screw, are combined into lighting device main body, and lighting device main body shows as a rigid unitary, have dismountable feature between each parts.

Compared with prior art, the advantage that apparatus of the present invention have and good effect are mainly manifested in following several aspect:

(1) this lighting device has effectively overcome the defect of existing various fluorescence lamp lighting device at aspects such as power output capacity, reliability, rainproof water-proof function and volume, structure, profile, installation and maintenance, fundamentally reverse existing various fluorescence lamp lighting device generally in being unfavorable for the passive situation of outdoor lighting application, made fluorescent lamp be widely used in outdoor lighting and become a reality.This lighting device not only can be widely used in the outdoor lighting fields such as road, square, station, harbour, park, community, building floodlight, can also be widely used in large-scale room lighting place, such as industrial and mineral, factory building, building site, various stadiums illuminations etc.In addition, also can give full play to one's skill in the special lighting such as greenhouse plants, bathroom occasion.Figure 17 is this lighting device effect schematic diagram.

(2) as previously mentioned, compared with other light sources, fluorescent lamp has unarguable advantage at the aspect such as uniformity and mildness, cost performance of colour rendering index, illumination, but all the time, because the fluorescent light fittings that is applicable to outdoor lighting is almost blank, these so-called advantages, its meaning is naturally limited.The appearance of this lighting device, makes these advantages fully be shown in outdoor lighting field undoubtedly, and it certainly will form unprecedented challenge to existing other two kinds of outdoor illuminations (HID, LED).

Said challenge is omnibearing above, the advantage of some aspect (such as: the uniformity of illumination and mildness) apparent, introduce one by one tentatively there is no need, but should introduce to some extent following several advantages:

The price of [price advantage is outstanding] this lighting device approximately only has 1/2 of HID lighting device, 1/4 of LED, and this advantage is very outstanding.It needs to be noted, China is in the fast-developing phase of urbanization at present, greatly develop samll cities and towns, walk to save the development of intensive utilization resource, become one of basic guiding principles of the Chinese government, the road of this Urbanization Progress tallying with the national condition provides vast potential for future development for this lighting device with outstanding price advantage.

[unique power savings advantages] lighting demand stems from the needs of mankind's social activities at night, and mankind's social activities at night has certain rule, and the first half of the night is relatively frequent, and obviously reduce the time after midnight.According to this objective law, people have proposed the concept of " becoming at times power illumination ".Here so-called " becoming at times power illumination " refers to: the first half of the night, brightness of illumination was higher, and the time after midnight, brightness of illumination reduced automatically.The sharpest edges that become at times power illumination are: can meet the lighting demand of different periods, and again can efficient economizing electric energy.

Although be not that all outdoor lighting occasions are all applicable to employing and become at times power illumination scheme, but not accommodating doubting, be applicable to adopting the application scenario of this scheme very extensive (such as: road, square, park, community etc.), therefore, having the lighting device that becomes at times power functions has broad application prospects undoubtedly.

At present, at outdoor lighting field (except nightscape lighting), HID light source is being played the part of most important role undoubtedly, but, for various reasons, it is exactly more difficult that the realization of HID lighting device becomes power control at times, and it is easily many that the realization of this lighting device becomes power control at times.

The fluorescent tube using in this lighting device can combine by organizing individual light pipe unit more, and each individual light pipe unit current supply circuit is coordination, realizes at times and controlling, and make all lamp tube units entirely bright, or part is bright, and part does not work, obviously than being easier to.

It is to be noted: this lighting device is generally complete bright pattern, become at times power illumination pattern and only need introduce a timing means.Because timing means correlation technique is simple and ripe, therefore this description does not do concrete introduction, but the power savings advantages of above said uniqueness is undoubtedly one of attribute that this lighting device has.

[the characteristic advantage having in road lighting field] road lighting is the illumination application that status is very illustrious, have great market scale, can accomplish something in this field, the development prospect of illumination apparatus, occupation rate of market have very important impact.

Road lighting is special to some extent, and it requires light source to have good Penetrating Fog performance.The Penetrating Fog performance of light source is better, more favourable to traffic safety, and therefore, mist transmitting index is that one of most important, prepreerence performance assessment criteria of light source is selected in road lighting.

Correlation theory research shows gold-tinted Penetrating Fog performance the best, and ruddiness takes second place.The sodium vapor lamp spectrum of 1950K-2400K colour temperature is substantially taking gold-tinted as main, this just at present the sodium vapor lamp in HID lamp can occupy in road lighting field one of most important reason of dominant position.

This lighting device colour temperature kind is very abundant, and wherein 2700K fluorescent lamp is compared with sodium vapor lamp light source, and not only gold-tinted composition is higher, and colour rendering index is more excellent; In addition, because HID electric ballast technical difficulty is large, the ratio of fluorescent lamp adapted electric ballast is far away higher than HID lamp, improve grid power factor aspect power savings advantages obvious, these characteristic advantages, not only, for this device is accomplished something vast potential for future development is provided in this special application field of road lighting, also provide possibility for breaking the current situation according to the bright field of road sodium vapor lamp dominance.

(3) this lighting device also has following features: aspect of performance, and power output is large, the life-span is long, use is safe, reliable; Volume, structure, profile aspect: volume is little, lightweight, novel structure, handsome in appearance; In addition, install simple, easy to maintenance.

(4) expanded function of more high-power demand: the peak power output of this lighting device is 250W, with reference to the actual conditions of current outdoor lighting occasion, this lighting device generally can meet the power demand of most of outdoor lighting occasions, but without disobeying speech, in the minority outdoor lighting occasion such as square, building site, this lighting device power output is obviously not enough to some extent.But, this lighting device is realized to power expansion, simple, Yi Hang very.

This device volume is little, compact conformation, special, unloads the lower installing rack in the lighting device main body shown in Fig. 3, replaces with the integrated installation part shown in Figure 15, just can realize the stiff assembly of many lighting devices, form " the fluorescent lamp wall " of a compact.Obviously, this " fluorescent lamp wall " not only can meet larger power demand, and has much style and intention.

Brief description of the drawings

Fig. 1 is fluorescent lamp conventional electronic ballast electrical schematic diagram.

Fig. 2 is the present invention's electric ballast electrical schematic diagram used.

Fig. 3 is this lighting device example structure figure.

In figure: installing rack, the upper installing rack of 4-, 5-light fixture, 6-fluorescent tube, 7-jump ring under 1-ballast, 2-power line special-purpose water-proof joint, 3-.

Fig. 4 is a kind of fluorescent tube parts 1 schematic diagram of the U-shaped grid structure being made up of single fluorescent tube.

Fig. 5 is a kind of fluorescent tube parts 2 schematic diagrames of the U-shaped grid structure being formed by two lighting tube combinations.

Fig. 6 is the part schematic diagram of jump ring.

Fig. 7 is light fixture general assembly schematic diagram.

In figure: 11-lamp casing, 12-sealing ring, 13-gland, 14-transparent glass.

Fig. 8 is lamp casing structural representation.

Fig. 9 is gland schematic diagram.

Figure 10 is transparent glass structural representation.

Figure 11 is sealing ring schematic diagram.

Figure 12 is lower installing rack structural representation.

Figure 13 is upper installing rack structural representation.

Figure 14 is another kind of upper installing rack structural representation.

Figure 15 is integrated installation shelf structure schematic diagram.

Figure 16 is power line special-purpose water-proof joint schematic diagram, and the left side is design of part schematic diagram, and the right is assembling schematic diagram.

In figure: the anti-hydraulic grade nut of 21-, 22-butted line threading solidus main body.

Figure 17 is lighting device effect schematic diagram.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.

Fig. 1 is fluorescent lamp conventional electronic ballast electrical schematic diagram.This is its most basic circuit, people can be according to different instructions for uses, to this basic circuit make a small amount of amendment or choice (such as: increase input filter circuit, insert pfc circuit, remove time delay thermistor R7, save capacitor C 5, C6, C8, C9, D7, D8, D9, D10 need not, etc.), but change ten thousand times without leaving the original aim or stand, its half-bridge inversion circuit, can there is not material alterations in fluorescent tube startup resonance circuit and ballast, the way of output etc.

Fig. 2 is the present invention's electric ballast electrical schematic diagram used.It is that Fig. 1 circuit in prior art is carried out to a kind of novel circuit after comprehensive Improvement and perfection, as Fig. 1, this is its most basic circuit, and people equally can be according to different instructions for uses, and this basic circuit is made to a small amount of amendment or choice (such as D5, D6 in pfc circuit, D7; R8, R9 in delayed startup circuit; Input filter circuit L1, C1; Or increase the number of output loading C9 in parallel, C10, L3, LAMP, realize one drag two, and drag the load of group more than three output in parallel, etc.), but change ten thousand times without leaving the original aim or stand, the insertion of its half-bridge inversion circuit, L2, the T1 isolating transformer way of output, N1, N2 are that fet cannot have material alterations.

Because this lighting device is a kind of series of products, power index difference, the size of light fixture is not quite similar, group number and the fluorescent tube arrangement mode of contained fluorescent tube are not quite similar, L2 in ballast circuit, T1, N1, the component parameters such as N2 are also not quite similar, but must be pointed out: no matter watt level how, for this lighting device of all power series, the overall structure relation of the basic circuit of ballast and lighting device does not have essence and changes, its embodiment, it is different that implementation principle and major technique behave do not have essence yet, Just because of this, be related to the detailed introduction of complex art behave of two aspects the present invention will be further described below by ballast and this lighting device overall structure, and using this as better case study on implementation of the present invention.

(1) one of complex art behave: solve the defect that traditional ballast exists

Two kinds of circuit shown in Fig. 1, Fig. 2 all belong to " half-bridge inversion circuit ", the citation form of circuit belongs to a class together, but Fig. 2 circuit is compared with Fig. 1 circuit, exist obvious difference at aspects such as output circuit, fluorescent tube startup, ballasting circuits, because radical change does not occur the citation form of circuit, so these differences can only be referred to as " Improvement and perfection ".All these " Improvement and perfections ", just in order to solve that circuit application shown in Fig. 1 exists many defects in outdoor lighting field and the concrete technical measures taked, therefore, in fact technique scheme is comprising the set of a series technique corrective measure.

Below by contrast, the comparison of Fig. 1, Fig. 2 circuit, these corrective measures are done respectively to concrete introduction and explanation.

1, between current rectifying and wave filtering circuit and inverter circuit, insert differential mode inductance L2

In Fig. 2, between input rectifying filter circuit and half-bridge inversion circuit, insert a differential mode inductance L2, make half-bridge inversion circuit become current mode half-bridge inverter.Between current rectifying and wave filtering circuit and half-bridge inversion circuit, insert after L2, due to compared with the 50Hz operating frequency of L1 in Fig. 1 circuit, the operating frequency of L2 much higher (identical with the frequency of inverter, be generally tens, KHZ even up to a hundred); And L2 adopts differential mode inductance pattern, and the reason of two aspects makes: even if adopt less magnetic core, also can accomplish that induction reactance is enough large, like this, be easy to realization voltage source inverter is transformed into current source inverter.Adopt significantly hoisting power fan-out capability of this kind of current source inverter, and be conducive to realize the parallel connection output of many groups load, created condition for this case adopts the lamp tube unit being formed by many fluorescent tube parallel combinations.

2, select fet to replace bipolar transistor

In " half-bridge inversion circuit ", N1, bis-triodes of N2 are very important core parts, and its integrated performance index and duty thereof are most important on the impact of ballast reliability.

Because bipolar transistor has the advantages such as the little and price of saturation voltage drop is low, thereby in electronic ballast for fluoresent lamp inverter circuit, be widely applied.But there is second breakdown characteristic in this triode, and temperature characterisitic is poor; Drive excitation to require relatively harsh; Comprehensive adjustment process complexity while changing different fluorescent tube, and exactly in these areas, fet has clear superiority than bipolar transistor.In this case, circuit shown in Fig. 2 selects fet to replace bipolar transistor.

It should be noted that, fet self temperature up to the condition of 100 DEG C under, electric current ability to pay is compared with 25 DEG C of normal temperature, and fall is no more than 35% conventionally, and this characteristic provides loose condition for whole ballast does the processing of totally-enclosed encapsulating rainwater-proof.

3, change the contravarianter voltage way of output

The output circuit of inverter adopts the isolating transformer T1 coupling way of output, makes the electric mutual isolation of main circuit and output loading.In circuit shown in Fig. 2, introduce isolating transformer T1, by the U of circuit shown in Fig. 1 _odirectly the way of output changes the transformer coupled way of output into, the U being produced by transformer secondary output T1-4 _o' power to the load.Here U, _o' magnitude of voltage size determines by the turn ratio of T1-3 and T1-4, value was guaranteed can reliably to be started to fixed load (fluorescent tube) according to Shi city net input voltage lower (180V left and right) time, according to the size of matched lamp tube power, U _o' be worth greatly between 800-1500V.

4, change the Starting mode of fluorescent tube

Circuit shown in Fig. 1 is by the series resonance of L3 and C9//C10, produces a sufficiently high voltage realize the startup to fluorescent tube at C9//C10 bis-ends.Have two kinds of Starting mode, retaining thermistor R7 is preheating delayed startup mode, and removing R7 is non-preheating instantaneous starting mode.

Fig. 2 circuit is to produce a sufficiently high open-circuit voltage U by T1 _o', then act on fluorescent tube two ends by C9, C10, L3 and realize the startup to fluorescent tube.The same with circuit shown in Fig. 1, there are preheating delayed startup and two kinds of modes of non-preheating instantaneous starting, preheating delayed startup mode retain use thermistor R9 and its breakdown voltage value of piezo-resistance R8(between 270V-470V), non-preheating instantaneous starting mode is removed R8, R9 need not.

When preheating delayed startup, U _o' act on fluorescent tube two ends by C9, C10, L3, because R9 cold-state resistance is very little, the breakdown voltage value of R8 is lower than fluorescent tube starting resistor value, so R8, the preferential conducting of R9 branch road implements preheating to filament.Now, fluorescent tube two terminal voltages are by clamper, and fluorescent tube can not be activated, and after time delay certain hour, R9 heating causes resistance value sharply to rise, and the voltage of fluorescent tube two ends also rises thereupon, and directly only fluorescent tube is activated.After entering normal arc discharge state, because modulating voltage is lower than the breakdown voltage value of R8, R8, R9 branch road are closed voluntarily, are approximately zero so flow through the electric current of filament.

When non-preheating instantaneous starting, U _o' pass through C9, C10, L3 independent role in fluorescent tube two ends, due to U _o' magnitude of voltage is enough high, causes electrode field emission and instantaneous starting.In such cases, no matter filament, without heating, is start-up course or arc discharge process, and heater current is always zero.

Non-preheating instantaneous starting is for preheating delayed startup, and after repeatedly starting, blackout phenomenon (due to the cathodic sputtering that ionic bombardment causes) easily early appears in lamp end undoubtedly, and this life-span for fluorescent tube and luminous efficiency are all disadvantageous.Therefore,, in the higher application scenario of the switch frequency, should adopt preheating delayed startup mode for well.But, for simplifying connection mode and being convenient to the needs of safeguarding, while adopting preheating delayed startup mode, this case requires R8, R9 and fluorescent tube and tube stand thereof to be made of one.

It needs to be noted: in outdoor lighting application, light fixture only needs switch once common every day, and the frequency of switch is very low.With work 8000 hours service life of fluorescent tube, every day 10 hours, every day switch once calculate, a fluorescent tube approximately can use 3 years, accumulative total on-off times approximately only has 1000 times, will reduce a lot compared with this switch number that conventionally need to be several times as much as this with home lighting.In such cases, the quality of lamp pipeline start up by preheating characteristic should be said affect the general situation (affecting very little), therefore, and at the lighting field the present invention relates to (comprising many public arenas), for reducing costs, reduce loss, raising the efficiency, can preferentially select non-preheating instantaneous starting mode.

5, change fluorescent tube ballast mode

Shown in Fig. 1 in circuit, inductance L 3 is carried out ballast to guarantee fluorescent tube steady operation to fluorescent tube, this ballast mode is referred to as inductance ballast mode, and circuit shown in Fig. 2 is to guarantee fluorescent tube steady operation by the ballast of C9, C10, L3, and it belongs to " inductor-capacitor " ballast mode.

It should be noted that, this case selects " inductor-capacitor " ballast mode to have some special considering and restrictive condition.

On the one hand: for circuit shown in Fig. 2, due to the U directly powering to the load _o' pipe pressure value U when the arc discharge of magnitude of voltage >> fluorescent tube _d, this means the voltage drop (U that ballast element carries _o'-U _d) larger, in such cases, consider from aspects such as volume, cost, heating, losses, select electric capacity ballast obviously more reasonable than selecting inductance ballast.If because other reasons is selected " inductor-capacitor " ballast mode, electric induction is as far as possible little.

On the other hand: in the time that city's net input voltage is lower (such as 180V left and right), U _o' always there is a critical value, lower than this critical value, fluorescent tube cannot be activated certainly, and only higher than critical value, fluorescent tube just can be activated.Problem is: under electric capacity ballast pattern, work as U _o' only in the situation a little more than critical value, although fluorescent tube finally may be by effectively start, abnormal glow discharge process that can a long period of experience in start-up course.Cross long abnormal glow discharge and be and cause lamp end one of the most important reason of turning black, it is far more than that for the negative effect of lamp tube service life, light efficiency filament causes the negative effect of the cathodic sputtering that Ions Bombardment produces without preheating far away.Therefore,, while considering ballast scheme, should avoid as far as possible the appearance of abnormal glow discharge phenomenon; Or it is inevitable to work as abnormal glow discharge, should shorten as far as possible the time of abnormal glow discharge, make fluorescent tube enter normal arc discharge by this stage rapidly.

According to the C-V characteristic of fluorescent lamp; when fluorescent tube is during in the abnormal glow discharge stage; if now can increase " artificially " a certain amount of voltage △ U; fluorescent tube just can be transformed into arc discharge state from abnormal glow discharge state immediately; in Fig. 2 circuit, in .C9, C10 loop, insert the improvement measure that inductance L 3 is taked based on this principle just.Insert after inductance L 3, when city's lower fluorescent tube of net input voltage is during in abnormal glow discharge, due to U _o' no longer increase, must there is stagflation in current potential, so inductance L 3 two ends will produce a resistance electromotive force △ U, need only △ U enough large, it and U _o' stack result just can impel fluorescent tube to be transformed into rapidly arc discharge state from abnormal glow discharge state.This ballast mode of inserting an appropriate inductance in ballast capacitor loop is referred to as " inductor-capacitor " ballast mode.

In fact, adopting " inductor-capacitor " ballast is not any innovation.But, with " inductor-capacitor " ballast in general sense different be, this case is in the time adopting this ballast scheme, for above analysis, ratio to its capacitive reactance and induction reactance between the two has more strict restrictive condition, and this is also to change behave for part likely to bring the one that new problem is taked to improve especially behave.

From improving the angle of fluorescent tube starting characteristic, because the size of △ U value is proportional to the inductance value of L3, obviously, inductance value is larger, improves effect just better; But, from the voltage drop of ballast element carrying | U _o'-U _d| large this angle is seen, selects electric capacity ballast more more reasonable than selecting inductance ballast, and this means again, if select " inductor-capacitor " ballast mode, the inductance value that inserts so inductance should be the smaller the better, based on the consideration of above two aspects, and requirement in this case

1:10>|X _L|:|X _C|>1:20，

Here, | X _l|, | X _c| be respectively the absolute value of induction reactance and capacitive reactance.

6, other explanations of the changes

(1) shown in Fig. 2 in circuit, between input rectification circuit and half-bridge inversion circuit, also inserted " a PPFC pfc circuit " being made up of elements such as D5, D6, D7, this behave can be brought up to the input power factor of ballast more than 0.9.In fact, circuit shown in Fig. 1 can insert this circuit equally, technical no problem, and only in the less situation of power, conventionally can save need not.Therefore, this change is not the technology behave that exists in this regard technological deficiency to take due to circuit shown in Fig. 1, and is only larger for outdoor lighting power, is necessary to consider power factor and of taking " supplements behave ".

It is to be noted, different clients, different use occasion, different regions, people may have different requirements to input power factor, lamp current crest coefficient, the total harmonic wave of input current, and this case can be selected different " supplementing behave " according to these different requirements.Between input rectification circuit and half-bridge inversion circuit, insert " passive power factor correcting circuit "; Insert " APFC "; Or not doing any relevant insertion is all one of alternative behave.

The row of the technology behave of not taking for the many technological deficiencies that solve circuit shown in Fig. 1 and exist in the present invention due to these different " supplementing behaves ", therefore seldom inquire at this.

(2) shown in Fig. 2 in circuit, N1, N2 use instead as fet, because the driving excitation of fet requires unlike bipolar transistor so harsh, and temperature characterisitic is better, therefore, as Fig. 1 circuit, do not use special magnet ring coupling energisation mode, but together with directly excitation coil T1-1, T1-2 being made in transformer T1.This has simplified circuit to a certain extent.

(3) " housing breather heat radiation " mode conventionally adopting from circuit shown in Fig. 1 is different, and in this case, for rainproof, waterproof, all elements in ballast casing adopt totally-enclosed encapsulating encapsulation.

Casting glue adopts novel " the black glue of electronics embedding " of Zhejiang The Orchid Pavilion China's light board, and this casting glue has fabulous waterproof, insulation and heat conductivility.

As everyone knows, boil water with " immersion heater ", if there is no the conductive force of water, " immersion heater " will soon damage.Based on principle of uniformity, the ballast under full closeding state, by means of the excellent heat conductivity performance of this casting glue, makes the radiating condition of all components and parts of rectifier be greatly improved undoubtedly.

The comprehensive supplementary notes of the technical problem that 7, the set of above all corrective measures can solve

In background technology, the technological deficiency that traditional ballast is applied to the existence of outdoor lighting field was done labor, can be these defect simplified summary: " waterproof heatproof ", " load open circuit ", " load short circuits ", " personal safety ", " lamp tube replacement and coupling ", " reliability of larger power output, longer service life and Geng Gao " 6 aspects.Because taked technical measures are aggregates, they often have comprehensive effect for the problem that solves these 6 aspects, therefore, in above-mentioned every monotechnics behave explanation, how some problem is resolved is difficult for can tell Chu, do again comprehensive supplementing in conjunction with the problem of these 6 aspects below.

(1) solution of waterproof heatproof problem

Can be found out by correlation analysis and explanation above, the solution of this problem adopts totally-enclosed encapsulating packaging technology with ballast and selects fet to replace the behave of bipolar transistor binomial technology relevant.Totally-enclosed encapsulating packaging technology is the direct behave addressing this problem, and fet replaces bipolar transistor for adopting totally-enclosed encapsulating packaging technology that loose condition is provided.

(2) solution of load open circuit problem

For circuit shown in Fig. 2, there is open circuit in so-called load, has two kinds of situations: a kind of situation is that the reason such as circuit, connector loose contact causes fluorescent tube, R8, R9 substantive open circuit simultaneously: obviously, while there is this kind of situation, load current will be always zero.

Another kind of situation is that fluorescent tube leaks air, inefficacy etc. is former thereby cannot start: while there is this kind of situation, due to the change of fluorescent tube Starting mode, the phenomenon of " series resonance " can not occur circuit, yet just can not produce and continue excessive overload current.At this moment,, if be non-preheating instantaneous starting mode (R8, R9 need not), load current will be always zero; If preheating delayed startup mode, initial start electric current when load initial current and original normal condition is suitable, subsequently, along with the rising of thermistor R9 resistance, it is little that load current becomes gradually, final, because thermistor heating seriously damages and form open circuit, load current will go to zero.

In sum, no matter occur the open circuit of which kind of form, load current can not exceed running current from start to finish, or is always zero, or levels off to very soon zero.So without any special protection measure, the safe operation for a long time of this improvement circuit is under load open circuit state.

It should be added that: under preheating delayed startup mode, once fluorescent tube damages or lost efficacy, thermistor certainly will be followed together and damage, and this is a kind of shortcoming seemingly.But in this case, together with R8, R9 and fluorescent tube and plastic base thereof do, when fluorescent tube lost efficacy, R8, R9 are also together replaced, therefore, this shortcoming has not also just become its problem.

The solution of technique problem is relevant with the change of the way of output, Starting mode and the comprehensive function of insertion L2 three technology behave.

(3) solution of load short circuits problem

Circuit can be found out as shown in Figure 2: under normal operating conditions, the operating current that flows through C9, C10, L3 is

Io=(U _O'－U _D)／（|X _C|－|X _L|），

Because of the induction reactance of the capacitive reactance >>L3 of C9, C10, X _lignore, so

Io≈(U _O'－U _D)／X _C， ┈┈④

In the time there is short circuit in load, U _d=0, the short circuit current that flows through C9, C10, L3 is

I _D≈U _O'／X _C， ┈┈⑤

Obviously, circuit is the same as shown in Figure 1, and compared with running current, short circuit current can increase equally to some extent.But, can prove, when negative value short circuit appears in circuit shown in Fig. 2, what the amplitude that short circuit current increases can be very is little.

Same with (I _d-Io) with Io recently reflect short circuit time load current increase multiple (with respect to Io):

4., be 5. not difficult to release by formula

（I _D－Io）／Io=U _D／（U _O'－U _D），

Set U _d/ U _o'=K, so

（I _D－Io）／Io=K／（1－K），

This formula be exactly in fact above-mentioned formula 3..But, it should be noted that: here, for difference to some extent, U _othe output voltage of representative graph 1 circuit inverter, U _o' the output voltage of representative graph 2 circuit inverters, so, set U _d/ U _o'=K and U _d/ U _othe physical significance of=K is identical.

3. can be found out by formula: the multiple that when short circuit, load current increases is directly proportional to K, namely with U _d/ U _o' value is directly proportional, U _d/ U _o' value is less, the multiple that when short circuit, load current increases is just less.

On the one hand, after improvement, the output voltage U of Fig. 2 circuit inverter _o' value (800-1500V) is far away higher than the output voltage U of Fig. 1 circuit inverter _ovalue (220V left and right); On the other hand, because Fig. 2 circuit is conducive to realize the parallel connection output of organizing fluorescent tubes more, under relatively high power index, can be by reduce the pipe pressure value U of list group fluorescent tube with the combination of many group fluorescent tubes _d, like this, guarantee U _o' >>U _dcondition be very easy to realize.

U _o' >>U _dmean U _d/ U _o'≤10%, that is to say K Zhi≤0.1.3. be not difficult to calculate by formula, short circuit current recruitment approximately only accounts for 10% of running current, the amplitude that short circuit current increases very little really.Therefore,, without other special protection measures, just can guarantee that the long-time safe operation of ballast is under the state of load short circuits.

The solution of technique problem is relevant with the change of the way of output, Starting mode, ballast mode and the comprehensive function of tetra-technology behaves of insertion L2.

(4) solution of personal safety problem

Ballast is taked " black glue " dosing technology and introduces the behave of isolating transformer T1 binomial technology effectively to prevent the possible person electric shock risk of contingency in installation, maintenance process:

Can find out from circuit shown in Fig. 2, circuit part and civil power before transformer T1 is elementary have contacting of direct electricity, are so-called charged " hot plates ", but because this partial circuit is all sealed by " black glue ", human body touch at all less than, so be safe.

Introduce isolating transformer T1, circuit part and civil power after T1 level of transformer are isolated completely, that is to say, with not contacting of direct electricity of civil power, so-called uncharged " cold drawing ", and the output line likely being touched by human body, dedicated connector and filament etc. all belong to a part for " cold drawing " circuit undoubtedly, so be safe equally.

(5) solution of lamp tube replacement and coupling relevant issues

Once spoke of above, for circuit shown in Fig. 1, while again changing fluorescent tube, performance in order to ensure ballast is unaffected, need to comprehensively adjust, because adjustment process is quite complicated again, therefore,, in actual application, not there is operability.

Change the way of output, Starting mode, ballast mode, meanwhile, N1, N2 use fet instead, and the comprehensive function of these four technology behaves can effectively solve this technical problem:

Identical with the solution principle of load short circuits problem, due to U _o' >>U _dso,, 3., 4., be 5. not difficult to reach a conclusion by formula: pipe is pressed U _dvariation should be less on the impact of Io.Because load short circuits is actually U _dthe extreme case changing.

On the one hand, the ballast after improvement has " constant-current characteristics ", the fluorescent tube that the different pipes of coupling are pressed, and output current Io remains unchanged substantially; On the other hand, the characteristic of fet is more good, so in the time changing the same specification fluorescent tube of different manufacturers or different batches, without comprehensively adjusting.

(6) realization of the reliability of larger power output, longer service life and Geng Gao

So-called " reliability of larger power output, longer service life and Geng Gao " is obviously a kind of qualitative form of presentation, on stricti jurise, says, these technical indicators should be by the conclusion of strict trace routine ability quantitative.Due to the restriction of objective condition, can only, by the comparison of Fig. 2 and bis-kinds of circuit of Fig. 1, taking relative theory analysis as foundation, prove that it is the logical inevitable outcome of taking after correlation technique measure that these technical indicators can significantly improve here:

On the one hand, in background technology one joint, exist relevant unfavorable factor aspect the service life of circuit shown in Fig. 1 under power output capacity, relatively high power condition and reliability, these unfavorable factors now can be summarized as follows:

Because its inverter circuit belongs to voltage source inverter in essence, in the larger situation of power, just there is in theory birth defect;

Owing to adopting " series resonance " Starting mode, definitely can not there is the open circuit of long period in load;

Due to U _dwith U _othe restriction of ratio, should not there is long short circuit in load;

In the larger situation of power, U _dinevitable higher, make the loss of circuit and the temperature rise of triode easily depart from place of safety, appearance what is called " plate bursting " phenomenon that can be many;

Under rainwater-proof full closeding state, components and parts radiating condition variation, the heat resistance of key element bipolar transistor faces further challenge.

Obviously, above every all can be brought disadvantageous negative effect to the service life under the power output capacity of circuit shown in Fig. 1, relatively high power condition and reliability.

On the other hand, Fig. 2 circuit relates to the relevant improvement behave of power output capacity, service life and reliability aspect and also did more detailed analysis, can be summarized as follows:

By introducing differential mode inductance L2, voltage source inverter is transformed into current source inverter;

By relevant improvement behave, make ballast safe operation for a long time under load short circuits and open-circuit condition;

By changing the comprehensive behave such as the way of output, Starting mode, ballast mode, while making ballast coupling difference manage the fluorescent tube of pressing, Io remains unchanged substantially, therefore, and U _dheight very little on the operating characteristic impact of circuit;

Use fet instead and adopt " black glue " dosing technology, heat radiation, heat resistance under ballast full closeding state are significantly improved.

Contrast and be not difficult to find, the problem that above correlation technique behave solves is exactly corresponding one by one with the problem that Fig. 1 circuit exists, as can be seen here, each technical measures has contribution to a certain degree for the power output capacity, service life and the reliability index that promote ballast, and the set of all technical measures can make these indexs be significantly improved undoubtedly.Therefore, for circuit shown in Fig. 1, circuit shown in Fig. 2 ought to have larger power output capacity, longer service life and the reliability of Geng Gao, and this should be logical inevitable outcome.

(2) two of complex art behave: solve the defect that existing lighting device exists at aspects such as volume, structure, profiles

Two of complex art behave relates to the aspects such as the collocation relation between fluorescent tube, light fixture and fluorescent tube, ballast, light fixture three, and it comprises the set of a series technique measure equally.The set of these technical measures is done to concrete introduction and explanation below.

1, between ballast, fluorescent tube, light fixture three, arrange in pairs or groups and be related to the innovation of aspect

According to the correlation analysis in background technology, collocation relation between ballast, fluorescent tube, light fixture three is determining the structural design scheme of light fixture, and the structural design scheme of light fixture is determining volume and the profile of lighting device, want effectively to overcome the defect that existing fluorescence lamp lighting device exists at aspects such as volume, structure, profiles, first must aspect the collocation relation between ballast, fluorescent tube, light fixture three, innovate to some extent.

This behave concrete scheme is: adopt and have the ballast of rainwater-proof function alone, within ballast is no longer placed in light fixture, and be placed on light fixture mistress; Fluorescent tube adopts the fluorescent lamp of U-shaped grid structure, makes enough " thin " of thickness of light fixture, on fluorescent tube caliber, is limited to T5, and with " small and exquisite " and " compactness " of guaranteeing that light fixture is enough, fluorescent tube is installed on chamber in light fixture; Design of Luminaires becomes to be similar to the pattern of " mobile phone " and " panel computer ", and ballast, fluorescent tube, light fixture are fixed by screw, are combined into lighting device main body, and lighting device main body shows as a rigid unitary, and each parts have dismountable feature.

In the embodiment shown in fig. 3, the encapsulation of ballast entirety encapsulating, as rainwater-proof parts independently, be fixed on light fixture mistress back by screw, ballast input line is connected with power line by power line special-purpose water-proof joint, and output line is connected with tube filament with socket by waterproof banana plug; Light fixture is planar lamp, and profile is similar to the pattern of " mobile phone " and " panel computer ", tool rainwater-proof function; Fluorescent tube adopts the fluorescent lamp of U-shaped grid structure, and fluorescent tube is installed on chamber in light fixture, and plastic stent one end of fluorescent tube parts is fixed in light fixture, in other end card people jump ring; Ballast, fluorescent tube, light fixture, the each parts of upper installing rack are fixed by screw, are combined into lighting device main body, and lighting device main body shows as a rigid unitary, have dismountable feature between each parts; Upper installing rack and lamp stand or body of wall one class supporter are fixed, installation between lighting device main body and supporter has fetched by the rigid connecting between upper and lower installing rack, its connected mode have can repeatedly dismantle again install, adjustable angle, the feature such as simple to operate, quick.

Implementing above behave has many composite requests, and it requires each parts to reach certain particular/special requirement by relevant behave is respectively prerequisite.The relevant behave of relevant ballast sees above, after the relevant behave of all the other each parts is asked for an interview.

2, fluorescent tube comprehensively improves behave

In this case, the version of fluorescent tube adopts U-shaped grid structure, and but, as previously mentioned, the fluorescent tube of only selecting existing U-shaped slab construction is inadequate, also must be perfect to some extent, and innovation to some extent.The fluorescent tube of this case U-shaped grid structure used is different with the fluorescent tube of the U-shaped grid structure of seeing in the market, and it is having some particular/special requirements aspect lighting tube combination mode; In addition,, due to the needs of rainproof waterproof, this lighting device belongs to " band cover lamp " in essence, in order to ensure the light efficiency of band cover lamp, also must take some special technique behaves.

Concrete behave is as follows:

(1) " small and exquisite ", " compactness " are the essential characteristics of this lighting device, and in order to meet this requirement, this case is selected on the caliber of fluorescent tube and is limited to T5, and according to watt level, the choice of diameter scope is T2-T5.

(2) change " connecing bridge " mode of the U-shaped structure fluorescent tube of traditional column, the fluorescent tube of the U-shaped grid structure that N the synthetic two dimensional surface of U-shaped light tube group distributed, then with electricity-saving lamp glue, one or two fluorescent tubes are fixed on a plastic base, form one group of lamp tube unit (referring to Fig. 4, Fig. 5, in Fig. 4, N is natural number, and in Fig. 5, N is even number).

Related description:

Different with the fluorescent tube of existing U-shaped grid structure, this case fluorescent tube used had both comprised the lamp tube unit (shown in Fig. 4) being made up of a fluorescent tube, also comprise the lamp tube unit (shown in Fig. 5) being formed by two lighting tube combinations, and do not need to produce cold junction by the means such as " connecing bridge ", " lengthening stem stem " or " glass-tube local crowning ".

In order to meet the extensive use demand of outdoor lighting, the power output of this lighting device can form a series (such as 45W, 65W, 85W, 100W, 150W, 200W, 250W series), this lighting device is under different capacity index, the combination of fluorescent tube used is not quite similar, power is less (such as T5 caliber, power is 100W), can select the lamp tube unit shown in a picture group 4, power is large (such as T5 caliber, power is 200W), can select the lamp tube unit shown in a picture group 5, also can select the lamp tube unit shown in two picture groups 4 to combine side by side.

Why this case fluorescent tube used has multiple combination mode, this be because:

On the one hand, the pipe of fluorescent lamp is pressed U _dbe directly proportional to the length of fluorescent tube, be inversely proportional to pipe diameter size, this means: 1., under certain power index, select caliber less, the pipe of this fluorescent tube is pressed just higher; 2. power index is larger, and the length of fluorescent tube is longer, and the pipe of this fluorescent tube is pressed just higher.

On the other hand, the U of traditional ballast to supporting fluorescent tube _dthere is ceiling restriction, although the ballast after improving is relatively loose to the pipe pressure request of supporting fluorescent tube, U _dceiling restriction exists undoubtedly equally, this means: under specific caliber, the power of single fluorescent tube and length will be restricted.

According to above analysis, using under the condition of single fluorescent tube, due to U _drestriction, relatively high power index be often difficult to realize.

Use many lighting tube combinations, can effectively reduce the pipe of every fluorescent tube and press, and ballast after improving can be realized the parallel connections output of many group fluorescent tubes, therefore, in the situation that power is larger, use many lighting tube combination modes can meet power requirement, be unlikely to again to increase the quantity of ballast.

(3) specially treated of fluorescent tube " cold junction " technology

In order to obtain the highest light efficiency, the mercury saturated vapour pressure in fluorescent lamp must maintain optimum value.Because mercury saturated vapour pressure is determined by fluorescent tube cold junction temperature, in order to reach the object of controlling mercury vapor pressure in lamp, people adopt cold junction technology conventionally.So-called cold junction technology, is exactly a temperature lowest part of artificial generation in fluorescent tube self system, and producing cold junction by the means such as " connecing bridge ", " lengthening stem stem " or " glass-tube local crowning " is comparatively common method.But for band cover lamp, in the cover (light fixture) of whole fluorescent tube in sealing, the method for above said generation cold junction is infeasible.In order to reach the object of controlling mercury saturated vapour pressure, this case fluorescent tube used adopts a kind of special cold junction processing mode:

This device uses a kind of stainless steel " jump ring " (referring to Fig. 6), and main points are made and installed to jump ring: 1. by the difference in size in design, jump ring is snapped in after fluorescent tube and form tension distortion, to guarantee having certain elastic force after the distortion of jump ring tension; 2. the interior warp of two semicircles of jump ring will equate substantially with the external diameter of joined fluorescent tube, to guarantee that jump ring and tube outer wall can comparatively closely contact under the effect of elastic force; 3. the other end of jump ring should be tight as far as possible by fixing between screw and lamp base, to guarantee that tube wall temperature can fast and effeciently conduct to light fixture by stainless steel jump ring.

Under duty, the temperature of tube wall is undoubtedly far above the temperature of light fixture, and by above measure, obviously, the temperature at the tube wall place contacting with jump ring can obviously reduce undoubtedly, and this has just artificially manufactured cold junction for fluorescent tube.In addition, the effect of support, fixed lamp tube is also played in the use of jump ring, makes the installation of fluorescent tube more reasonable.

(4) control cold junction temperature and use two kinds of methods of amalgam and use

Because this lighting device belongs to band cover lamp in essence, and power output is larger, although can take into full account the heat-dissipating space of fluorescent tube aspect Design of Luminaires, the temperature of tube wall temperature and light fixture unavoidably can be relatively higher.

The temperature of lamp temperatures relatively higher " cold junction " that naturally mean this case manufacturing is still relatively higher, in order to ensure the light efficiency of fluorescent tube, it is inadequate only using cold junction technology, also must make mercury vapor pressure optimum value move on to some extent, make mercury vapor pressure optimum value corresponding with the temperature of cold junction, could effectively control mercury vapor pressure like this and approach optimum value.For this reason, this case requires supporting fluorescent tube to use the amalgam higher than 50 DEG C.

Controlling cold junction temperature and using amalgam is two kinds of main method controlling at present mercury vapor pressure, and existing various fluorescent lamps use a kind of wherein method conventionally, and according to actual conditions, this case requires two kinds of methods and uses.

(5) other requirements

1. after fluorescent tube is fetched from making factory, as adopt preheating delayed startup mode, in the filament loop of every fluorescent tube, must seal in R8, R9(referring to Fig. 2), make R8, R9, fluorescent tube and plastic base thereof form one group of complete lamp tube unit (under non-preheating instantaneous starting mode, R8, R9 need not).

2. every group of lamp tube unit is all complete independently parts, and the plastic base of lamp tube unit is provided with two open hole, uses screw one end of every group of lamp tube unit can be fixed in light fixture by through hole, in the other end card people jump ring of lamp tube unit.

3. the fluorescent lamp using in this case, should be hot-cathode fluorescent lamp under preheating delayed startup mode; Under non-preheating instantaneous starting mode, can be both hot-cathode fluorescent lamp, can be also cold-cathode fluorescence lamp.

It should be explained that: so-called " cold-cathode fluorescence lamp " not refers to the glow discharge class cold-cathode fluorescence lamp of that superfine pipe diameter here, and refers to arc discharge class cold-cathode fluorescence lamp.This lamp is except using cold cathode (being similar to the negative electrode of Metal halogen lamp), technology, technique, characteristic, low pressure discharge mechanism etc. all aspect with hot-cathode fluorescent lamp without any difference.

In fact, hot-cathode fluorescent lamp is operated in (so-called " hard reboot " in the industry) under non-preheating instantaneous starting mode, be exactly in fact that hot-cathode fluorescent lamp is operated under cold cathode pattern, in this sense, in the not high public arena of the switch frequency, this lighting device adopt above " cold-cathode fluorescence lamp " defining should be more directly, more pragmatic selection.

3, the relevant behave of fitting structure design (containing installing rack)

(1) light fixture

The external mode of ballast, has effectively reduced the volume of light fixture; Fluorescent tube adopts U-shaped grid structure, makes enough thin of the thickness of light fixture; On fluorescent tube caliber, be limited to T5, guarantee " small and exquisite " and " compactness " that light fixture is enough, above behave is that relative new is designed in this case, attractive in appearance, small and exquisite, practical light fixture has been created advantage.

Light fixture is mainly made up of parts such as lamp casing, transparent glass, sealing ring, glands, and Fig. 7 is light fixture assembling schematic diagram, and Fig. 8, Fig. 9, Figure 10, Figure 11 are respectively lamp casing, gland, transparent glass, sealing ring part schematic diagram.

It is to be noted, because this lighting device is a kind of series of products, power index difference, the concrete specification of light fixture, size are not quite similar, the group number of contained fluorescent tube and respectively organize fluorescent tube install arrangement mode be also not quite similar, so, only provide a basic design concept and main method for designing here.

The pattern that light fixture configuration design becomes to be similar to " mobile phone " and " panel computer " is that this case fitting structure designs most important design concept, and light fixture relevant drawings provides a kind of basic method for designing for realizing this design concept, follow this design concept and relevant design method, under certain power index, according to the concrete size of ballast and fluorescent tube, Design of Luminaires size is specialized, and designing concrete case is not difficult matter.

Other related description: be applied to outdoor lighting, the making material of lamp casing and gland should be aluminium; Be applied to room lighting, the optional engineering plastics of using.Be approximately 16mm taking T5(caliber) be example, power is in 100W, and light fixture thickness is got 60mm, and 120W gets 80mm above, to guarantee that fluorescent tube has certain heat-dissipating space, makes lamp temperatures be unlikely to too high.Lamp casing inwall should have one deck light reflecting membrane, secondary reflection for light; In addition, lamp filament binding post, input port will be made corresponding arrangement, and all these less important design details are not added on embodiment in the accompanying drawings, need to be added on supplementary perfect in concrete case design process.

(2) installing rack

Here said installing rack, for lighting device being fixed on such as a kind of erecting device on lamp stand, body of wall one class supporter, this lighting device installing rack is made up of two parts, upper installing rack and lower installing rack, lower installing rack and light fixture are fixed, upper installing rack and supporter are fixed, and in order to meet the installation requirement of different supporters, this case provides two kinds of dissimilar upper installing racks.

Relevant installing rack structural design refers to Figure 12, Figure 13, Figure 14.

Installing rack shown in Figure 12 is the lower installing rack fixing with light fixture, installing rack shown in Figure 13 is a kind of for lighting device being fixed on to installing rack in the one on lamp stand, and installing rack shown in Figure 14 is a kind of for lighting device being fixed on such as the upper installing rack on body of wall one class supporter.

Fixing employing " routine " fixed form between fixing and lower installing rack lower end and lighting device main body between upper installing rack upper end and supporter, the installation between lighting device and supporter completes by " especially " fixed form between the upper and lower installing rack other end.Here, so-called " routine " fixed form refers to: while needing repairing in long-term use procedure (as changed fluorescent tube, ballast etc.), and the fixed form that does not need dismounting to install again; So-called " especially " fixed form refers to: when maintenance, can repeatedly dismantle the fixed form of installing again.

Because " special " fixed form between upper and lower installing rack is a kind of fixed form of installing of can repeatedly dismantling again, this just requires this fixed form must meet two conditions: 1. simple, convenient; 2. safety, reliable.In order to meet above requirement, this case has adopted a kind of comparatively special fixed form, is described below:

A protruding M6 or M8 stainless steel screw are contained in the lower end of upper installing rack, and this screw is together with upper installing rack integral cast; There is a slightly bigger through hole corresponding with screw the upper end of lower installing rack, and lower installing rack through hole can be realized to the close contact upper and lower installing rack through screw, then, is fixed with a stainless steel gasket and a wing nut.In addition, the close contact place between upper and lower installing rack is designed with respectively only miniature shaggy tooth of 8-10, like this, can prevent from producing and sliding around screw axis between upper and lower installing rack, can also regulate when mounted the irradiating angle of integral illumination device.

On the one hand, when maintenance, as long as disconnect urban network electricity source line and take off two actions of wing nut, just main lighting device can be taken off to (fixing without dismounting between upper installing rack and supporter); On the other hand, this lighting device gross weight is conventionally only in 3-5KG, and in fact, this similar fixed form often can be seen in bulkhead lamp capable application, and therefore, this fixed form can meet above said two conditions completely.

Other related description of installing rack: according to the difference of the supporter under different application occasion, the structure of upper installing rack is different, the upper installing rack of different styles offers user as annex, user can make different choice according to the difference of application scenario, this way, is used widely necessary requirement is provided for this lighting device; China's lamp stand end diameter has 50mm and bis-standards of 60mm, and the Ф D in Figure 13 should answer in contrast; All there are a protruding M6 or M8 stainless steel screw in the lower end of Figure 13, bis-kinds of upper installing racks of Figure 14, no matter upper installing rack adopts aluminium or other which kind of materials, stainless steel screw and upper installing rack main body must adopt integral cast technique.

Many these lighting devices can integrated installation become " the fluorescent lamp wall " of relatively high power, and installing rack shown in Figure 15 is the integration installation apparatus of this " fluorescent lamp wall ".

The related description of 4, lighting device input, the behave of output line join dependency and maintenance, part replacement aspect

The input line of ballast realizes detachable waterproof with urban network electricity source line by two power line special-purpose water-proof joints (seeing Figure 16) and is connected; Output line is realized plug by one group of waterproof banana plug with the waterproof banana bin on light fixture and is connected, and banana bin is connected with the tube filament in light fixture.

Need to particularly point out: use the termination shown in two Figure 16 to realize respectively docking of two input lines of ballast and power line, simultaneously, use waterproof banana plug, banana bin reality ballast output line to be connected with the plug of filament, this binomial behave for guarantee this device be convenient to disconnect in maintenance and maintenance process line fast, safely, reliably play a very important role.

Safeguard and part replacement related description:

In long-term use procedure, it is unavoidable to there is damaging the phenomenon not working in lighting device, and ballast and fluorescent tube damage or the life-span ends main cause often, therefore, changing ballast and fluorescent tube is one of main task of safeguarding the normal operation of lighting device.From the angle of being convenient to safeguard, implement to change to damaging parts, not only should there is on-the-spot operability, its method of operating also should be simple as far as possible.With regard to this case, why ballast, fluorescent tube etc. makes independently parts; Between each parts, why there is dismountable characteristic; Why more special the mode that is connected and fixed between upper and lower installing rack is, takes out stitches, the why proprietary reply of the mode of connection, invariably relevant with above consideration.

The replacing operation of ballast, two parts of fluorescent tube is done to necessary explanation below:

Change ballast:

Because ballast is placed on light fixture, it is fairly simple undoubtedly that operation is changed at the scene of ballast.With regard to Fig. 3 embodiment, because ballast is positioned at light fixture mistress back, before operation, should, by loosening slightly the wing nut of fixing upper and lower installing rack, make one end as far as possible vacating space of light fixture with ballast, so that operation.It is to be noted: in fact, ballast can be placed in other positions such as light fixture rear sides, but implement howsoever, ballast is changed feature simple to operate and can not be changed.

Changing fluorescent tube divides three steps to carry out:

The first step: disconnect urban network electricity source line, take off the wing nut of fixing upper and lower installing rack, lighting device main body is taken off;

Second step: the operation of changing fluorescent tube is carried out on ground at the scene: screw off light fixture gland hold-down screw, take off light fixture gland and transparent glass, unclamp binding post filament lead wire and fluorescent tube hold-down screw, change fluorescent tube parts;

The 3rd step: restore.

Certainly, if there is back-up device, on-the-spot only need to implement first step operation, residue work can be taken back office and carries out, so more quick.

5, two of complex art behave technical problem analyses that can solve

So far, be described in further detail two of complex art behave, should say: on the one hand, the solution one to one that these behaves are taked at the defect of the aspect existence such as rainproof water-proof function, volume, structure, profile installation and maintenance for existing fluorescence lamp lighting device exactly; On the other hand, different with one of complex art behave, complex art behave two related be mostly profile, structure aspects problem, these problems are more directly perceived, can improve, specific descriptions by behave itself just can be found out effect, therefore, by two associated description of complex art behave, without doing again comparative analysis, this device can effectively overcome the defect that existing fluorescence lamp lighting device exists at aspects such as volume, structure, profiles, should be the apparent fact.

The foregoing is only the present invention's preferred embodiment; not limit practical range of the present invention with this, all persons that is familiar with technique, use principle of the present invention and technical characterictic; various changes and the decoration done, within all should being covered by the protection category that these claims define.

Claims (10)

1. an outdoor lighting high-power flat fluorescent lamp, is made up of ballast, fluorescent tube, light fixture, installing rack, it is characterized in that: the encapsulation of described ballast entirety encapsulating, and the circuit of described ballast is current mode half-bridge inverter, main circuit and load electrical isolation; Described fluorescent tube adopts the fluorescent lamp of U-shaped grid structure; Described light fixture is rainproof planar lamp; The input line of described ballast is connected with power line, output line is connected with the filament of described fluorescent tube; Described ballast is installed on the mistress of described light fixture, and described fluorescent tube is installed on the interior chamber of described light fixture; Described ballast, fluorescent tube, light fixture, the each parts of installing rack are fixedly connected with, and are combined into a complete lighting device.

2. plane fluorescent lamp according to claim 1, is characterized in that: between the input rectifying filter circuit of described ballast and half-bridge inversion circuit, insert a differential mode inductance L2, make half-bridge inversion circuit become current mode half-bridge inverter; The output circuit of described current mode half-bridge inverter adopts the isolating transformer T1 coupling way of output, makes the electric mutual isolation of main circuit and output loading.

3. plane fluorescent lamp according to claim 1, is characterized in that: the electronic devices and components entirety encapsulating encapsulation in the shell of described ballast, there is rainwater-proof function alone, and be placed in light fixture mistress.

4. according to the plane fluorescent lamp described in claim 1,2 or 3, it is characterized in that: in described current mode half-bridge inverter, adopt fet.

5. according to the plane fluorescent lamp described in claim 1,2 or 3, it is characterized in that: described Design of Luminaires becomes to be similar to the pattern of " mobile phone " and " panel computer ", described ballast, fluorescent tube, light fixture are fixed by screw, be combined into lighting device main body, lighting device main body shows as a rigid unitary, has dismountable feature between each parts.

6. plane fluorescent lamp according to claim 5, is characterized in that: described light fixture is made up of lamp casing, transparent glass, sealing ring, gland.

7. according to the plane fluorescent lamp described in claim 1,2 or 3, it is characterized in that: described fluorescent tube is by the fluorescent tube of the U-shaped grid structure of N the synthetic two dimensional surface distribution of U-shaped light tube group, then with electricity-saving lamp glue, one or two fluorescent tubes are fixed on a plastic base, form one group of lamp tube unit.

8. plane fluorescent lamp according to claim 7, it is characterized in that: described fluorescent tube uses stainless steel Circlip apparatus, in two of one end semicircle of described jump ring, through substantially equating with the external diameter of described fluorescent tube, the other end of described jump ring is fixed by screw and lamp base.

9. according to the plane fluorescent lamp described in claim 1,2 or 3, it is characterized in that: described installing rack is made up of two parts, upper installing rack and lower installing rack, lower installing rack and light fixture are fixed, and upper installing rack and supporter are fixed.

10. according to the plane fluorescent lamp described in claim 1,2 or 3, it is characterized in that: the input line of described ballast realizes detachable waterproof with urban network electricity source line by two power line special-purpose water-proof joints and is connected; Output line is realized plug by one group of waterproof banana plug with the waterproof banana bin on light fixture and is connected, and banana bin is connected with the tube filament in light fixture.