CN2175508Y

CN2175508Y - Desk daylight lamp with ac-dc converter

Info

Publication number: CN2175508Y
Application number: CN 93235110
Authority: CN
Inventors: 陈满平
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-30
Filing date: 1993-11-30
Publication date: 1994-08-24
Anticipated expiration: 2003-11-30

Abstract

The utility model relates to a desk daylight lamp with an AC-DC converter, which comprises a charge power supply, a DC inverter which can change a DC into an AC and a charging control device. The utility model is characterized in that a two to four knives manual switch or a relay with four groups of contacts is provided to individually control the conduction of every circuits, namely, the conductions of the charging energy storage of a charge power supply battery jar or the DC inverter and the conductions of the commercial power supply illumination or DC inverter power supplied illumination can be controlled. The utility model can be an ordinary light fixture, and the utility model can also be an emergency lamp.

Description

Desk daylight lamp with ac-dc converter

At present, all kinds of family expenses light reading lamps are arranged on the market, charging device generally is not set, when civil power stops supplying, can't throw light on.Also have a kind of AC/DC emergency light, its basic structure is to adopt a charge power supply, converts direct current to the Alternating Current Power Supply illumination by direct-flow inverter, and charging process realizes by a charging device, but can not start fluorescent tube simultaneously.

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of light reading lamp with DC-AC conversion device is provided, and makes this lamp when civil power stops supplying, be convertible into direct current supply, in charging, also can throw light on by mains-supplied, after its charging was satisfied, charging stopped automatically.

For reaching this purpose, adopt a relay or two that contains four groups of contacts to throw the conducting that the four blade hand switch is controlled the each several part circuit respectively, that is: the conducting of control charge power supply and direct-flow inverter, the conducting of illumination of control mains-supplied and direct-flow inverter powered lighting.

Adopt light reading lamp of the present utility model, both made ordinary lamp and lantern, can work as emergency light again, be particularly suitable for the usefulness that all kinds of personnel learn office.

Embodiment one

Fig. 1 is the circuit theory diagrams of the light reading lamp of embodiment one band DC-AC conversion device.

This light fixture is made up of charge power supply, direct-flow inverter, battery charge controller, alternating current-direct current work transducer, alternating current-direct current shared load, under-voltage startup six parts.Charge power supply adopts 6V storage battery E; Direct-flow inverter is a capacitor C ₄～C ₇, resistance R ₁, triode BG ₁With transformer B ₂The high-voltage pulse generating circuit of forming can convert the direct current among the storage battery E to the high-voltage pulse electricity for the fluorescent tube illumination; Battery charge controller comprises step-down transformer B ₁, bridge rectifier QL, capacitor C ₁～C ₃, resistance R ₂～R ₅With diode D ₁～D ₅And controllable silicon SCR; Alternating current-direct current work transducer is a relay J, and it has four groups of contact J _1-1, J _1-2, J _1-3, J _1-4, contact J _1-1The charging accumulation of energy of control storage battery E and the conducting of direct-flow inverter, contact J _1-2, J _1-3, J _1-4The conducting of illumination of control mains-supplied and direct-flow inverter powered lighting; The alternating current-direct current shared load adopts fluorescent tube RR; Under-voltage startup is by diode D ₆, K switch ₂Form.

Its course of work is as follows: connect civil power 220V, four groups of contact J of relay J _1-1, J _1-2, J _1-3, J _1-4Action, normally closed some a ₁～a ₄Disconnect the b of often making war ₁～b ₄Closure, civil power one tunnel is through transformer B ₁Step-down, the direct voltage of bridge rectifier QL anode passes through resistance R ₂Be added in diode D ₄Anode, the voltage that is higher than storage battery E because of this voltage passes through diode D ₄To storage battery E charging, when the voltage of storage battery E was charged to setting, the controllable silicon SCR conducting was with diode D ₄Positive terminal voltage is stabilized to the magnitude of voltage less than storage battery E, because diode D ₄Be in reverse bias this moment, so diode D ₄End, charging stops automatically, simultaneously, and diode D ₁Conducting is luminous, sends the charging termination signal.The charge closing K switch ₃, each element of charging control circuit quits work.

Another road of civil power is by lighting switch K _1-2Contact J with relay J _1-2, J _1-3, J _1-4Directly give the fluorescent tube powered lighting.If civil power is under-voltage, fluorescent tube can not start, and presses under-voltage K switch ₂, treat fluorescent tube two ends filament spot, unclamp under-voltage K switch then rapidly ₂Get final product.Find out that more than charging and mains-supplied illumination can be carried out simultaneously, if only need charge, close lighting switch K _1-2

When civil power stops confession, four groups of contact J of relay J _1-1, J _1-2, J _1-3, J _1-4Action, the b of often making war ₁～b ₄Disconnect normally closed some a ₁～a ₄Closure, storage battery E is through lighting switch K _1-1To the high-voltage pulse generator power supply, the high-voltage pulse electricity of generation is through the contact of relay J J _1-2, J _1-3Directly power to fluorescent tube, at this moment, ballast ZL, starter Q do not work.

Embodiment two

Fig. 2 is the circuit theory diagrams of the light reading lamp of embodiment 2 band DC-AC conversion devices.

With Fig. 2 and Fig. 1 contrast, draw embodiment 2 and embodiment 1, just alternating current-direct current work transducer is selected different former devices, and embodiment 2 adopts two to throw four blade hand switch, K ₄(K _4-1, K _4-2, K _4-3, K _4-4) its course of work and embodiment one be just the same, no longer be described herein.

Claims

1, a kind of light reading lamp with DC-AC conversion device comprises rechargable power supplies, fluorescent tube, direct current can be converted to the direct-flow inverter and the battery charge controller of interchange, and feature of the present utility model is:

A, employing contain the relay J of four groups of contacts, contact J _1-1The charging of control rechargable power supplies storage battery E or the conducting of direct-flow inverter, contact J _1-2, J _1-3, J _1-4The conducting of illumination of control mains-supplied or direct-flow inverter powered lighting;

B, also can adopt one two to throw four blade hand switch K ₄(K _4-1, K _4-2, K _4-3, K _4-4) the next relay J that contains four groups of contacts that substitutes.

2, desk lamp according to claim 1 is characterized in that battery charge controller, comprises step-down transformer B ₁, bridge rectifier QL, capacitor C ₁～C ₃, resistance R ₂～R ₅With diode D ₁～D ₅And controllable silicon SCR, its charging process is to lean on the direct voltage of the anode of bridge rectifier QL to pass through resistance R ₂, diode D ₄Charge to rechargable power supplies storage battery E.

3, desk lamp according to claim 1 is characterized in that fluorescent tube RR is as the alternating current-direct current shared load.