JPS5949064A - Control method for tube wall temperature of fluorescent lamp - Google Patents

Abstract

PURPOSE:To control the tube wall temperature of a fluorescent lamp with high accuracy, by reducing the electric power fed to a heater as the temperature rises up after the tube wall temperature reaches a prescribed level. CONSTITUTION:When the wall temperature of a fluorescent lamp reaches a temperature t1, a copying machine is set under a copy enable state. The quality of a copied image is just slightly infeiror to the normal quality as long as the variation of exposure amount is within 10%. This can reduce the waiting time (warm-up time) for the start of copying. When the tube wall temperature exceeds the temperature t1, a power control part 13 monitors a tube wall temperature signal 7 and reduces continuously the power supplied to a lamp heater 4 as the tube wall temperature approximates to the lower limit temperature t2 within an optimum temperature range. Such control lowers gradually the heating quantity of the fluorescent lamp to avoid an improper rise of the tube wall temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluorescent phantom wall drying system II1d used in a copying machine t5.

The image information processing device of the multiple 7j' aircraft and Nono Kushimiri Roshi has
IjX 4r. A vessel that illuminates ゜b. Eyes U fffl
Lights are often used. An example of a fluorescent lamp is shown in Figure 1.
However, when the temperature is within a predetermined temperature range (32 to 37 degrees G in the figure), the maximum value becomes large. (For example, in a Toto copier, preheating of the fluorescent lamp starts from the power-on stage, and the temperature of the tube wall rises to the specified humidity. It is prohibited.

Figure 2 shows the outside of the fluorescent illusion used in this J, U/, E copy machine. The inscription of 1 fluorescent lamp 1 which represents 1 {()
The wall 1△ is covered with a curved non-woven sheet 4, except for the area 3 where the light is emitted to the document surface and the area 3 where the radiation detector 2 is removed. Conventional copier (・
゛(Yo, when the power is turned on to the compound machine, the thirst! α detector 2
starts detecting hot stones in the center of the tube wall 1A. Zoshi (
The detected temperature is between the humidity boxes A (phase λ・1 light intensity 100
% range), turn the heater l1 to 311
! Heat continuously. After this, set the compound σ machine 4゛υ−ijJ to a functional state (J., set the reference temperature within this normal range Δ and the humidity of the tube wall ′1△ By comparing the A and A-no controls of Lanzo heater 4, 1-1 (IJ.

However, this type of fluorescent lamp tube wall (: + A degree i1 + control method C) had the disadvantage that the tube wall temperature was controlled to be 1 good or relatively thick. <r ;l
1 degree of tube wall 1△ is optimal << 1 degree range A (Kodatsu J
Since 100% of the electricity allocated to the lamp is supplied in the evening, the power supply is
c' () Ten echoes of Taojα continue for a while, and the optimum temperature q
・1 River △ to the crowd 1j) 2 Riruru (Opage) -
Go to 1).

In this J, type of copying machine, there is a nofnon for cooling the fluorescent lamp. If you say this,
(I move J, sea urchin (there).

However, fluorescent lamps also perform self-heating in the lighting state 'C'! It is possible to quickly place a warm stone on the floor at a low temperature.
It is important to prevent such widespread invasions.

If the tube's 4%'2 wetness were to fluctuate sharply, it was inevitable that the exposure 1μ of the IJLJ would fluctuate to a certain extent, which would have an adverse effect on the quality of copies and the like.

The object of the present invention is to provide a method for controlling the temperature of a tube wall for fluorescent light, which allows freezing at the 41st point and controlling the tube wall temperature with good viscosity.

In the present invention, ゛ is 1 time when the temperature of the fluorescent lamp reaches a predetermined dl, 1 time.
To achieve the above-mentioned purpose, the power supplied to the monitor should be avoided.

The present invention will be explained in detail using a small example.

FIG. 3 shows the electric circuit Dj<immediate J/, S configuration for realizing this tube wall temperature control method 7'1.

Detection output from the crystallinity detector 2 (13'j"j!
-) 14. Supplied to Urame Boshun Exchange Department 6, pipe wall removal! L
A tube wall vortex proportional to Gj is created once. Pipe wall temperature 1
The σ signal 7 is supplied to the comparison section ε3.
] Compared to father-in-law 11. e! [lIn+A degree confidence Yshi 1
'1 is the temperature at 00% relative light intensity compared to Figure 1]1
There is a signal (゛is there).

Comparison unit 8 compares both temperature 1 signal 7.11 and calculates -J-,'tl to the tube wall temperature of 47 light 1 or temperature t1, (゛, total power supply signal>-'i12) Output cover.Power control section′
IJ3G, 1, tube wall temperature 111 No. 7, all power supply signal 1
J who does 2 manually.

Unii ``C, full power supply 1 □ Receive 12 monthly fi-(when there is, i'l'j allotted one 1o
0% power (rated power) is supplied 8 to the lamp 4. I mean? 1 photo 1jl! ' t, L power is turned on - (from Buddhist wall?: (A degree or Ll j-j, ', l ruru 3
Then, lamp heater 4 is fluorescent'): Jl! Heats up quickly. Up to this point, the conventional d, 1.
It's okay.

9'; wall temperature 1α/] When the temperature reaches 1, Enoki's copy editor 11 is set to the copy tiJ-enabled state. The variation in exposure b1 is 1
If it is within 0%, the image quality of the double image is always 1 b O) J
, it is far inferior to J.
Start copying f5i.
C
be.

If the temperature exceeds 1, the power control unit 13
The temperature of the pipe wall (11 degrees is the highest), the humidity range is 1. The odor is close to the 1), and the lamp is the same. The 1-b force supply jj1 to the motor 4 is continuously lowered.

In this J, the heating of the fluorescent light 1 is gradually lowered to 1 degree, so the 1 degree is unreasonably -1-￥
I never get 11 li. The d3 fluorescent lamp 1 generates heat when turned on. Jutsu'(Ba!', Y?: n'r degree is lj;
, Jim 7! , li Di A overcoming 1
At the meeting, the sono-n (not shown) was not driven and the
1 air cooling is done 4''l.

ε1) Figure 4 shows the embodiment of the electrical circuit that realizes this control. Power terminal of compound η machine r21.224J
1. Commercial electricity JI+i via a power switch (not shown)
(△C100V) is connected to the power supply line 23. connected to the power supply terminal 21.22.
2/I (Yo, circuit voltage iI6C 2(5 is connected)
(There is.

Circuit electric 6! Between the DC line 26 connected to the DC output end j' DC of 2J and one power line (earth line) 271, Resistor 29
A circuit in which (2) an amplifier 31 is connected in series, and (33) a circuit 1 to a trigger circuit 333 for controlling the bi-directional iristor 32 are connected in parallel. It is continued.

Leemister 27 is a fluorescent light source (IA).
There is a built-in all-page detector C, whose first-generation response changes depending on the tube wall temperature. Also change] resistor 2ε3
The iMar rsL L + is 1.9 constant C'C
'a3< Ic me(1) 'AA BL RtJ
>e A'i J' (There is.

Now, when the power is turned on to one store, the resistor 29
The temperature display in 1 lb per min/f is input manually to the amplifier 31.

The humidity display signal 35 amplified by this pile is supplied to the human horn terminals 11 of the power circuits 1 to 33. 1 to re-power circuit 33; Other input of 3 *M; child-1? 4Z 4J
, Base 111-Electric silica generator 3G standard electric j1 France) J37
is supplied.There is a
[The generator 36 is supplied with 1) zero cross point detection from the cross detector 38; Group 11 [Heavy generator 3 (5 is J, S, F) shown in Figure-J,,
l, -Each of the AC waveform points/(・■“l
“y”1・Saw that starts the girder [■! A single wave is generated. This h'X reference voltage j in this example] - Nitsuki 37
There is C. On the other hand, the temperature table H355 has a temperature coefficient of 1, r as shown in FIG.

1~rito circuit 33j humidity display signal 3] and) do base i4j
Compare the power signal 1-signal 37, and the voltage level of base 1j voltage im 37 shows the temperature (No. 111 350). L sa Uru. A close-up photo of 911 in winter with power lines thrown into the ground! (In many cases, the temperature of the tube wall of fluorescent pair 1 is as low as 11 J, which is as low as 1 degree.) (Please note that the temperature display 4E4'Y4S5's voltage level V+J is always at a low level.

The J-reel circuit 33 now generates the 1-1 cross point/smell (trika conversion H3, 41) in FIG. Ro 1
11. When the lamp heater 4 is connected to the alternating current power supply (& phase C' is energized, the fa light is turned on.) The phantom tube wall 1△ is J,
heats up rapidly.

When the tube wall temperature exceeds temperature (1), the weight level of the small signal 35 becomes less than v1. Accordingly, from 1 to
+i /"r 41's sound 4 [Zurui 1"l phase is rising. For example, refer to Figure 6.
．． '-< 12) (J changes, 1j11 mark display enemy Y' 35 Ichikawa level becomes Vl). The generated phase is delayed, and the main power supply to the heater 4 is greatly reduced (u' + 71, diagonally lined).
, the sea urchin color and wall temperature are high, and the temperature is high;
According to the degree, the degree of heating of the tube heater 4 decreases.
,'tt shi, warm jα table small iha issue 35) Shimotsuki [level is V? At the end, the double h b'+J M quiz 32 makes a loud noise, and the heating of the lamp heater 4 stops. It's hard to get f11.

4I:J> Fluorescent pair 1 lights up and copies? - In the state where there is no τ, the self-heating of the fluorescent pair 1 causes the temperature of the tube to rise. To avoid this, avoid driving the 1 n and avoid air cooling the tube wall 1 △.
2, the lamp heater 4 is heated (
゛, tube wall temperature 1 degree is 1; (There is no need to heat the tube wall of the fluorescent tube unnecessarily, so you can do 1- without wasting electricity.

[Brief explanation of the drawing]

Figure 1 shows the relationship between the tube wall temperature of the fluorescent pair and the relative light H) (
2 is a perspective view showing the external appearance of the fluorescent pair, and FIGS. 3 to 7 illustrate an embodiment of the present invention). 3) Figure 3 shows the principle of the electric circuit that realizes the control method of the present invention. Figure 4 is a block diagram that embodies this. ′) The figure is based on ;1(,
The waveform diagram of the voltage signal, Figure 6 is a JJ knee'J- characteristic diagram showing the mil change of the temperature table, and Figure 7 is a diagram to explain the heating control of the lamp heater with J in the trigger circuit. Each Shinto ritual [
FIG. 1...Tai Kogen N...1st year of high school
m detector 4...Lamp heater F'3...
... Comparison section I C'3 ... Power control section
27... Rimister 32... Bipunotropic Su-irista 33...) Rimister circuit

Claims (1)

[Claims] Get a heater to heat the γζ wall of the fluorescent lamp, and use the J3 heater to maintain the tube wall temperature within the desired quality range and perform a relatively high light intensity (point pair). In a four-unit device, the temperature of the fluorescent tube wall is measured, and this temperature is +i1
The rated power is supplied to the same unit until it reaches a predetermined temperature lower than the temperature in the range specified in i), and as the wall temperature 1jI exceeds the predetermined temperature range 6CJ, C. A fluorescent tube wall temperature control method characterized in that the tube wall temperature is brought within the desired temperature range while gradually reducing the amount of power supplied to the heater.