In the 1980s, my factory introduced the US commercial food refrigerated display cabinet manufacturing technology and was the first to produce in China. Non-fluorescent lamps are required for illumination, light source distribution, light color and heat dissipation required for interior lighting of commercial food refrigerated display cabinets. However, due to the narrow space in the commercial food refrigerated display cabinet, low temperature and humidity, the fluorescent lamp is difficult to start, the fault is many, and the replacement and maintenance are not easy. For this reason, the technical department constantly replaces the lamp and rectifier which are considered to be the best, in order to find A more efficient, longer-lasting, maintenance-free fluorescent fixture. However, the effect has not been as expected.
After moving into a new home, I think of such a use effect, it is really pleasing, but is it an accidental individual case? I feel that I should continue the experiment, so I added the M block of the two 30W fluorescent lamps in the new home. It was opened on July 3, 2003. One of the lamps burned out on December 19, 2008, but the ballast was intact. This lamp is installed with 611 days plus 1993 days for 2604 days. If it is used for 4 hours per day (the room is at the bottom, north, the light is not good), the life of this lamp is 10416 hours; another As of the date of this writing, the lamp has been in normal use and there is no fault. The lamp has been installed with 611 days plus 2521 days before and after the installation of M block for 3132 days, 12528 hours. At present, the two ends are not black, and the brightness is also normal.
In the use and maintenance, it is often found that the working life of different brands of fluorescent lamps varies greatly. Mr. Liu Xu of Sujiang wrote in the second issue of "Electronics" in 2004 that the factors affecting the life of iron-core fluorescent lamps are lamp current, current waveform, preheating current and repeated start-up. Are these factors in electronic ballast fluorescent lamps?
Adding M blocks in the fluorescent filament circuit, after 23 years of use and observation, the effect is actually very good, I am afraid not only accidental coincidence and individual cases, perhaps, the addition of M blocks, the work of fluorescent lamps is indeed benign Impact. In order to explore this mechanism of influence, I found some instruments to observe the working conditions of fluorescent lamps.
Observed items:
Current and power changes when the electronic fluorescent lamp is turned on and running;
The change of current after the electronic fluorescent lamp is connected in series with the M block;
Electronic fluorescent lamps, life test of start/stop (on/off) times;
Test instrumentation:
T51 voltmeter, D51 wattmeter, DB-2 standard watt-hour meter, all of which are grade 0.5;
DM-6015 digital multimeter;
ST-16 oscilloscope;
Canon EF-M SLR camera; taking photos, its photometric system is used to roughly evaluate the illumination of fluorescent lamps;
Homemade oscilloscope camera synchronous shooting device;
Time controller; controlling the start/stop time of the electronic fluorescent lamp;
Automatic recorder, record the start/stop time and number of fluorescent lights, the time and number of faults, the time and number of power outages;
The observation began on September 14, 2007 and ended in early April 2008. It lasted for about 7 months. Although the time was not long, the observations were not comprehensive, the instruments were not well-professional, but the number of records already passed, The dozens of photographs taken and the results of two start/stop tests can still summarize some of the cognitions that have been recognized in the Journal of Lighting Engineering (2009, Issue 1). In the text, a preliminary explanation is given. In the filament circuit of the fluorescent lamp, the resistor R is connected in series. When the filament current passes through R, a voltage drop Ur is generated across the R, and Ur is sent to the y-axis of the oscilloscope, which can be seen on the screen. The waveform of the filament current. The amplitude. Frequency, recorded in the photo, easy to compare and calculate its various values.