CN2406447Y

CN2406447Y - Double metal soft starter

Info

Publication number: CN2406447Y
Application number: CN 00202953
Authority: CN
Inventors: 马恒徕
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-25
Filing date: 2000-01-25
Publication date: 2000-11-15
Anticipated expiration: 2010-01-25

Abstract

The utility model relates to a thermal sensitive bimetal automatic switch device which is used for preheating starting of electronic energy-saving lamps. The utility model is formed in the way that a zinc oxide voltage-sensitive sheet, a thermal conduction metal body, a thermal sensitive bimetal moving contacting sheet, an insulator and a fixed contact body are orderly combined into a whole in a stitch welding way. Two outer-layer pole faces and the thermal conduction metal body are respectively connected with a conducting wire, and a main body is wrapped and sealed with an insulation layer. At the time of use, a filament is started after preheating and can be closed completely. When the lamps work normally, a soft starter does not consume work, produce no heat quantity, and has no heating influence on other elements. Not only light effect can be increased by 3 % to 6%, but also characteristics of current input in lamp tubes can be improved. The service life of a switch of the utility model can be more than 20 thousand times. The utility model conforms to and exceeds work requirements of the switch.

Description

The bimetallic soft initiator

The utility model relates to a kind of heat-sensitive duplex metal automatic switch device that compact electronic fluorescent lamp (electricity-saving lamp) pipeline start up by preheating is used that is mainly used in.

At present, the light efficiency of the measured electricity-saving lamp of matter has reached 60Lm/W, is 6 times of incandescent lamp bulb, and the life-span can reach about 8000h, is 8 times of incandescent lamp bulb.Because electricity-saving lamp economize on electricity, life-span length, no stroboscopic, volume are little, easy to use, so become the ideal green illuminating product.

Usually, the startup working method of electricity-saving lamp has two kinds, and the one, restart behind the filament pre-heating; The 2nd, quick cold start-up.Above-mentioned two kinds of working methods have considerable influence to the switch life of lamp, and the general thermally-actuated switch life-span is tens of times of cold starting switch life-span.Usually blackspot appears in cold start-up hundreds of time back lamp tube ends, and serious blackout after 1000 times influence light efficiency and normal the use, therefore adopts pipeline start up by preheating (being soft start) mode very obvious to the result of use of raising electricity-saving lamp.

The pipeline start up by preheating of the electricity-saving lamp soft initiator of generally need between the lamp tube ends filament, connecting.The CN2145491Y patent provides a kind of fluorescent lamp starting preheater, and this preheater adopts the thermistor (PTC) that has positive temperature coefficient and have the Curie point switch temperature, is connected in parallel in the electronic circuit on the oscillating capacitor between fluorescent lamp two filaments.At present, generally adopting PTC is the preheating soft start, and it is one of main means that prolong the lamp life-span.But the greatest drawback of PTC is a wasted work not only at work, and heating, makes the electrical quantity drift of its peripheral electronic component even loses efficacy.Many professional persons think, make good use of PTC element not a duck soup (seeing that " light source and illumination " No.3 in 1999 reaches " lamp and illumination " No.2 in 1999), therefore influence its extensive use.The inventor provides a kind of soft initiator that turn-offs in the CN99257116.2 patent application, be mainly used in the electronic ceramic device of electricity-saving lamp pipeline start up by preheating, it unites two into one zinc oxide varistor and barium titanate doping thermosensitive resistor film, heat-sensitive sheet control lamp pipeline start up by preheating, pressure-sensitive control low-voltage closed, the heat-conducting metal body is guaranteed device reliability for preventing that the zinc oxide pressure-sensitive sheet is overheated, and key property is contactless, automatic switch, non-wasted work, does not produce heat.

The purpose of this utility model is to provide a kind of athermic soft initiator that automatically shuts down of no power consumption that is mainly used in electronic energy-saving lamp.

It is one that the utility model makes up stitch welding in order by zinc oxide pressure-sensitive sheet, heat-conducting metal body, heat-sensitive duplex metal movable contact spring (bimetal leaf), insulator, fixed contact body, and two outer pole-faces and heat-conducting metal body connect lead respectively, and main body is sealed insulating barrier.Zinc oxide pressure-sensitive sheet (pressure-sensitive) is a disc, and external diameter is 6～12mm, and the heat-conducting metal body is flat drum shape, and its external diameter and thickness are respectively 6～12mm and 0.2～1mm; Baseplane spot welding bimetallic movable contact spring in the drum, the contact of bimetallic movable contact spring contacts with the contact of fixed contact body.

Because the phenomenon that has temporary transient heat to produce in the pressure-sensitive change resistance characteristic of zinc oxide pressure-sensitive sheet and the current lead-through process, fluorescent tube needs high voltage startup, filament pre-heating can improve useful life, after the fluorescent tube operate as normal, tube voltage is generally tens volts of difficult controls of the source current crest factor to more than 100 volts and electric ballast output.And for the utility model, when the lamp power supply is put in order in connection, be defeated by lamp tube current at first by filament and pressure-sensitive, because the conducting voltage that pressure-sensitive conducting voltage is located at less than fluorescent tube (generally is located at 120～200V), at this moment filament will produce heat (preheating), and pressure-sensitive also produce heat, and heat is passed through heat-conducting metal pass to bimetal leaf, distortion displacement after bimetal leaf is heated, the bimetal leaf movable contact spring leaves fixed contact after about 0.6～1 second, at this moment voltage all puts on lamp tube ends, and work is lighted in the conducting under high voltage triggers of negative electrode fluorescent tube.Tube voltage is generally about 100V after the lamp works, and pressure-sensitive quits work under this voltage, does not therefore have power consumption, and after temperature descended, the bimetallic movable contact spring set back, and this device is still kept not wasted work.If need control electric ballast output current operating characteristic, can control the starting current and the operating current of output at capacitor of drawing 1～2 suitable parameter in parallel between lead and the lead of the present utility model, improve its electric current crest factor and heater current value, the utility model is applicable to the work of most electronic energy-saving lamp soft start.Because during the lamp operate as normal, soft initiator quits work, no power consumption; can improve current characteristics; and temperature protection can be set, so its effect is obvious, not only can improve total light efficiency of whole lamp; and the useful life that has prolonged whole lamp; its switch life can reach more than 20,000 times, meets and surpass the switch job requirement of fluorescent lamp, not only improves 3～6 percentage points of light efficiencies; and improve input lamp tube current characteristic, strengthened whole lamp reliability.

Fig. 1 is a structure chart of the present utility model.

As shown in Figure 1, the bimetallic soft initiator is made up of zinc oxide pressure-sensitive sheet 1 (adopting shock resistance type to become quick of damping), barrel-shaped metal heat-conducting body 2 (employing solderability, the metal that thermal conductivity is good), heat-sensitive duplex metal movable contact spring 3 (generally adopting 5J18 or 5J11 type), insulator 4 (better, the flame retardant type material of employing thermal diffusivity), fixed contact 5 (generally adopting fine copper) and lead 6～8 (adopting beryllium tin copper wire).The interior baseplane of at first barrel-shaped heat-conducting metal body and the spot welding of bimetallic movable contact spring, and wherein arbitrary pole-face weldbonding of outerplanar and zinc oxide pressure-sensitive sheet, after fixed contact body and the insulator brazing filler metal again with the round mouth inward flange brazing filler metal of insulator and barrel-shaped metallic object, and the fixed contact body is contacted with moving contact, pressure-sensitive another outer pole-face, the fixed contact outer surface, barrel-shaped metallic object round mouth place is welding lead 6～8 respectively, main body is sealed flame retardant insulation, its size and relevant parameter request are decided with the matched lamp specification, common zinc oxide pressure-sensitive sheet 1, heat-conducting metal body 2, insulator 4 is circular, its external diameter is respectively 6～12mm, 6～11mm, 5～10mm, bimetallic movable contact spring thickness is 0.16～0.28mm.The elasticity of bimetallic movable contact spring and size Control are in the time of 100～130 ℃, and separate automatically two contacts.For preventing very accident, between fixed contact and the lead-out wire overtemperature protection device can be set, for example temperature control fusible link etc.

Claims

1. bimetallic soft initiator, it is characterized in that making up stitch welding in order by zinc oxide pressure-sensitive sheet, heat-conducting metal body, heat-sensitive duplex metal movable contact spring, insulator, fixed contact body is that one is formed, two outer pole-faces and heat-conducting metal body connect lead respectively, and main body is sealed insulating barrier.

2. bimetallic soft initiator as claimed in claim 1 is characterized in that said zinc oxide pressure-sensitive sheet is a disc, and its external diameter is 6～12mm.

3. bimetallic soft initiator as claimed in claim 1 is characterized in that said heat-conducting metal body is flat drum shape, and its external diameter and thickness are respectively 6～12mm and 0.2～1mm.

4. as claim 1 and 3 described bimetallic soft initiators, it is characterized in that baseplane and the spot welding of bimetallic movable contact spring in the said heat-conducting metal body drum, the contact of bimetallic movable contact spring contacts with the contact of fixed contact body.