RU2687074C1 - Expansion method of effective mercury lamp emitting zone - Google Patents

Abstract

FIELD: lighting engineering.

SUBSTANCE: relates to the field of lighting technology and can be used for expansion of the effective mercury lamp emitting zone, which ensures the guaranteed individual dose of ultraviolet radiation to consumers provided by lamps in the equipment used in beauty salons, tanning studios, as well as physiotherapeutic rooms of medical and preventive institutions. To expand the effective radiation zone of the lamps, dividing into time intervals with an effective average light flux value, wherein operating time in each interval is recorded in timer, which changes task for start-up equipment by value of electric energy supplied to lamps during transition from one time interval to another, which improves quality of lamps and provides consumers with a guaranteed individual dose of ultraviolet radiation.

EFFECT: longer duration of stable light flux and higher quality of operation by providing a guaranteed individual dose of ultraviolet radiation to consumers.

1 cl, 5 dwg

Description

The invention can be used to expand the zone of effective radiation of mercury lamps, providing an individual dose of UV lamps guaranteed for each consumer in equipment used in beauty salons, tanning studios, as well as physiotherapeutic rooms of medical and preventive institutions.

According to the literature known patent RU 2470496 C2, H05B 37/02 "System and method of controlling lighting devices," the technical result of which is to improve the management efficiency of lighting devices. The system has one or more light sensors for collecting sensor data for optical feedback and a user interface for providing reference data representing the desired mixed light. The system also has a controller for converting either sensor data or reference data into the coordinate space of another of these data types and for determining the difference between sensor data and reference data in this coordinate space.

The disadvantages of this method are the use of feedback on the luminous fluxes of lighting devices, which require the presence of light sensors, complicating the control system, and a controller for processing data from the sensors to obtain a given quality of mixed light, which is not required in phototherapeutic installations with a strictly specified radiation spectrum.

Patent RU 2470496 C2, H05B 37/02 “Method and device for increasing the range of dimming control of solid-state devices” is also known, in which the result is achieved by the fact that the system for controlling the light output level of a solid-state lighting load controlled by a dimmer regulator includes a phase angle detector and power converter. The phase angle detector is configured to measure the phase angle of the dimmer based on the rectified voltage from the dimmer and determine the power control signal based on a comparison of the measured phase angle with the set one. At the same time, due to the feedback on the phase angle of regulation, work is carried out qualitatively at a low required level of illumination.

The disadvantage of this method is that when it is used, a proportional dependence of the luminous flux on the consumed power source is taken, which is not true for mercury UV lamps that change the amount of light output, bringing it to the level of inoperability during operation, with the same power consumption.

The technical result of our proposed method of expanding the zone of effective radiation of mercury lamps is an increase in the duration of a stable light flux and an improvement in the quality of their work by providing a guaranteed individual dose of ultraviolet radiation to consumers.

The technical result is achieved by the fact that in this method, to expand the zone of the guaranteed period of operability, the zone is divided into initial and subsequent time intervals of effective radiation. The duration of the intervals correlates with the characteristics of the lamps and is fixed in the equipment with a timer from the beginning of their operation. In the initial interval with a high level of light output, which exceeds its average value over the guaranteed service life, the radiation intensity is reduced by the regulator operating for the time specified by the timer. Upon completion of the initial and subsequent intervals, the timer changes the setting for the radiation intensity controller of the control system in the next interval, which keeps the average radiation value at an effective level.

Previously, to divide the operability period into the initial and subsequent effective radiation intervals, the characteristics of the time dependence of the radiation level of mercury lamps on their operating time are used, as well as the relationship of the radiation level with the value of the power supplied to the lamps for each interval.

The method of expanding the zone of effective radiation of mercury lamps is illustrated by the drawings shown in FIG. 1-5

FIG. 1 shows the characteristic of the time dependence of the radiation level of mercury lamps in the process of their use with a constant value of the power of electrical energy and its division into time intervals,

where: F - the magnitude of the luminous flux of the lamp;

t is the lamp operation time;

t ₁ , t ₂ , t ₃ is the end time of the first, second and third intervals;

Ф _Э - the effective value of the luminous flux;

F _CP1 , F _CP2 , F _CP3 - the average value of the luminous flux for each interval.

FIG. 2. shows the dependence of the radiation level of mercury lamps on the magnitude of the power supplied to them for each interval, where:

К _Р = Р _К / Р _Н - lamp load factor;

1, 2 ₁ , 3 ₁ , 4 ₁ - characteristics at a constant value of the nominal power of electrical energy at the input of the lamp;

1, 2 ₂ , 3 ₂ , 4 ₂ - characteristics with a variable in magnitude for each interval of the power of electrical energy at the input of the lamp.

FIG. 3 shows the relative level of power supplied to the lamp for different intervals.

FIG. 4 shows the regulation-correlated dependence of the radiation level of mercury lamps while maintaining the average value for each time interval in the process of their use.

FIG. 5 shows a block diagram of the control system, which ensures that the average radiation level for each time interval is maintained during the operation of an effective level of radiation from mercury lamps, where:

PRA - control gear;

T - timer;

L - mercury lamp.

During operation of mercury lamps, their luminous flux (F) does not remain constant in magnitude, but decreases with time. This is due to the unfavorable temperature effect on quartz glass used in mercury lamps, which worsens its lighting performance. A negative factor for them is also the destruction of the electrodes of the lamps by electrons and plasma ions. In general, the decrease in light output by mercury lamps is confirmed by their manufacturers' passport data. So for lamps of the type FR79T12 180W VHO PH of the manufacturer WOFF SYSTEM Turbo 33 / 180R 2.0m NE / AR with the recommended lamp life of 1000 hours it is indicated in the passport that after 500 hours of operation the light output is reduced by 20% - 30%. Such a reduction naturally does not guarantee the consumer the receipt of the required radiation dose even within half of the recommended working period and, moreover, during the whole 1000 hours.

The claimed method is as follows: the characteristic dependence of the luminous flux on the time of use of the lamp is divided into time intervals (Fig. 1). The reference value of the luminous flux for the first interval (F _e ) is taken to be its value after 50-70 hours of lamp operation, during which the luminous flux varies most intensively from its initial value. Subsequent intervals are characterized by no more than 20% change in the magnitude of the luminous flux within them. In addition, each of the intervals has its average luminous flux decreasing with time Ф _СР1 , Ф _СР2 , Ф _СР3 (average value of the light flux for each interval).

Exceeding relative to Φ _{e, the} average value of the luminous flux for the first interval is reduced to Φ _e due to the supply to the lamp of lesser power from the control gear (PRA). The value of this power is determined by the curves of the dependence of the average value of the luminous flux on the load factor of the lamp (Fig. 2)

P ₁ = K _P ⋅ _{P N}

Where:

P ₁ is the power of electric power supplied to the lamp in the first interval;

K _P - the load factor of the lamp;

Р _Н - rated lamp power.

The decrease in the electrical power supplied to the lamp in the first zone favorably affects the lighting performance of the lamp, which positively affects the dependence of the luminous flux on the load factor K _P in the second zone, converting the lamp from characteristic 2 ₁ obtained when the lamp is powered in the first zone with a nominal power P _H , on the characteristic 2 ₂ , obtained by supplying the lamp in the first zone with a reduced power P ₁ The mean value of the luminous flux in the second time interval Φ _e can also be obtained at a reduced level of electrical energy P ₂ supplied to the lamp. For each of the subsequent intervals, the level of electrical energy is determined by the expression

Р _К = К _РК ⋅Р _Н

Where:

Р _К - electric power power supplied to the lamp in the K-th interval;

TO _RK - the load factor of the lamp for the K-th interval.

The value of K _P for each of the intervals is presented in FIG. 3. The dependence of the luminous flux on time when adjusting the lamps by intervals is shown in FIG. 4. After the output for one of the intervals to the nominal value of power Р _Н (К _РК = 1), for the subsequent lamp-time guaranteed by the manufacturer, the power of the supplying electrical energy remains unchanged with a lower decrease in luminous flux than when the lamp is powered with a nominal power .

Preliminary separation of the time characteristics of the mercury lamp into time intervals allows you to determine the duration of each of them and record this information in the timer, which starts counting the time from the moment the lamps start operating. The timer at the end of the time of each interval changes the setting of the control gear by the amount of electrical energy supplied to the lamp for the next interval.

Thus, the expansion of the zone of effective radiation of mercury lamps is carried out by controlling the electrical power supplied to the lamps in accordance with the time intervals of their operation, determined by the timer, which monitors the lamp operation time from the beginning of their operation and changes the task for each of the intervals to electric power supplied to the lamps. energy.

The proposed method of expanding the zone of effective radiation of mercury lamps provides for each consumer an individual dose of ultraviolet radiation of lamps in equipment used in beauty salons, tanning studios, and physiotherapeutic rooms of medical and preventive institutions.

Claims (1)

The method of expanding the zone of effective radiation of mercury lamps, including the change in the level of electrical energy supplied to them, characterized in that to expand the zone of radiation of the lamps, the lamp operation time is divided into time intervals with an effective average value of the luminous flux, while the time in each interval is entered into a timer that changes the task for the control gear by the amount of electrical energy supplied to the lamp during the transition from one time interval to another, which increases lamp quality and provides consumers with a guaranteed individual dose of ultraviolet radiation.

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