JPS5899106A - Air cooling type ozone generator - Google Patents

Abstract

PURPOSE:To generate ozone of always specified density irrespectively of the change in the temp. of cooling air by detecting the temp. of the cooling air and controlling the voltage to be applied to an ozone generator according to the detected temp. CONSTITUTION:Raw material air is introduced through the inlet 3f of an ozone generator 3, and is passed through a gap 3c for electric discharge (a symbol 3a is a grounding electrode and 3b is a high voltage electrode). This air is discharged through an outlet 3g as ozonized air. On the other hand the cooling air from a blower 1 is fed through a duct 2 to the outer side of the grounding electrode 3a, by which the air is cooled. In the above-mentioned apparatus, the signal obtained by detecting the temp. of the cooling air with a detector 6 is fed via a ratio setter 7 to an electric power positioner 8. The positioner 8 compares said signal with the instructed value from a transducer 9 and feeds the signal obtained by said comparison to a controller 5b which controls the voltage to be applied to the high voltage electrode 3b by running a driving motor 5a of an induction voltage regulator 5 forward or backward.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air-cooled ozone generator, particularly to the applied voltage side of a silent discharge ozone generator.

A conventional device of this type is shown in FIG. In the figure, (1) is a blower that supplies cooling air, (2)
A duct connected to Hato's blower, (3) an ozone generator connected to this duct, (3a) a ground electrode provided to this ozone generator so as to be cooled by the cooling air, (3b) is the high voltage electrode provided inside this ground electrode, (3c) is the discharge gap formed between both electrodes, (
3d) is a spacer that maintains this discharge gap; (3e) is a power supply bushing that supplies power to the high voltage electrode (3b); (3f) is a raw material air inlet that supplies air to the discharge gap (3c); 3g) is an ozonized air outlet for discharging ozonized air from the discharge gap (3c), (4) is a high voltage transformer connected to the high voltage electrode (3b), and (5) is this high voltage transformer. An induced voltage regulator provided between the power sources, (5a) is a driving motor for this induced voltage regulator, (5a)
5b) is a control device for controlling this electric motor.

Next, the operation will be explained. When high voltage is applied to the ozone generator (3) via the induction voltage regulator (5) and high voltage transformer (4), the ground electrode (3a) and high voltage electrode (3b)
A silent discharge occurs in between. The voltage applied by the induction voltage regulator (5) is adjusted by the control device (5b) to the electric motor (5a).
Rotate forward and backward. Discharge gap where silent discharge occurs (
When feed air is supplied to 3c), ozone is generated and taken out as ozonized air through the ozonized air outlet (3g). Approximately 95 cm of the discharge power of silent discharge becomes heat,
It is cooled by cooling air sent by the blower (1).

Here, the generation of ozone is influenced by the dryness of the raw air, the pressure in the discharge gap, and the temperature of the electrodes. Among these, the temperature of the electrode changes depending on external conditions. That is, when the temperature of the cooling air changes, the temperature of the electrode changes accordingly. Figure 2 shows the relationship between temperature changes in cooling air and ozone production efficiency.

Further, the ozone generation characteristics using the cooling air temperature as a parameter are shown in FIG.

Since the conventional air-cooled ozone generator is configured as described above, it has a drawback that the ozone concentration in the ozone generator (3) changes as the temperature of the cooling air changes.

Cooling air is over 10 degrees Celsius during the day, and over 20 degrees Celsius per year.
A concentration difference of nearly ℃ occurs.

Therefore, there was a problem that the ozone concentration and the amount of ozone generated were not stable.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by detecting the temperature of cooling air and changing the voltage applied to the ozone generator according to the temperature of the cooling air, it is possible to maintain a constant ozone concentration. The purpose of the present invention is to provide an air-cooled ozone generator that can be maintained at

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a flow diagram showing an ozone generator according to an embodiment of the present invention. In FIG. 1, the same reference numerals as in FIG. 1 indicate the same or corresponding parts. (6) is a cooling air temperature detector that detects the temperature of the cooling air in the duct (2), (7) is a ratio setting device that outputs a value according to the detected cooling air temperature, and (8) is an ozone generator. (9) is an ozone generator (
3) a transducer that detects the discharge power of tll
, Oυ is the high voltage transformer (4) and the induced voltage rai
These are an instrument transformer and a current transformer provided between one regulator (5).

Next, the operation will be explained Cooling air temperature detector (6)
The detected cooling air temperature is given as an input to a ratio setter (7), and an output calculated according to the temperature is given to a power positioner (8). ′Mineral positioner (
8) compares the given command value with the indicated value of the transducer (9) and instructs the control device (5b) to rotate the drive motor (5a) of the induced voltage regulator (5) in the forward or reverse direction. A signal is given, thereby causing the electric motor (5a) to rotate forward or reverse, and adjusting the voltage applied to the ozone generator (3) so that the discharge power corresponds to the cooling air temperature.

To explain this situation in more detail, let us say, for example, that the standard cooling air temperature is 20° C., and that the casting bottom voltage output in this state is 80%. Assuming that the m degree of the cooling air increases by lθ°C, the ozone yield decreases by about 7% as shown in FIG. 2 or 3. Therefore, the output of the ratio setter (7) is set to increase by about 7%. The relationship between the temperature and the output of the ratio setting device (7) must be set to calibrate the non-direct resistance using an appropriate broken line approximation, etc., in accordance with the ozone generation characteristics obtained from Figures 2 and 3. be.

In the above embodiment, the applied voltage was adjusted using a ratio setter (sword, power positioner (8), and transducer (9)), but other similar means may also be used. In the example, a cylindrical electrode was described, but the electrode structure may be a flat plate type.

A similar effect can be obtained.

As described above, according to the present invention, since the voltage applied to the ozone generator is adjusted according to the cooling air temperature, a stable ozone concentration can be obtained at all times. It also has the effect of reducing power consumption when the cooling air temperature is low, such as during the winter.

[Brief explanation of the drawing]

Figure 1 is a flow diagram of a conventional air-cooled ozone generator, Figure 2
The figure shows the relationship between cooling air temperature and ozone yield, f4
FIG. 3 is a curve diagram showing ozone generation characteristics using cooling air temperature as a parameter, and FIG. 4 is a flow diagram of an ozone generator according to an embodiment of the present invention. +1)... Prower, (2)... Duct, 131...
・Ozone generator, (4)...Voltage transformer, (5)・
・・Electric conduction voltage regulator, (5a) ・・Driving electrical conductor, (
5b)...Control device, (6)...Cooling air temperature detector, (Power...Ratio setting device, +8)...Electric cab positioner, (9)...Transducer, ul/- - Durability transformer, Qυ...Current transformer In the diagrams, the same reference numerals indicate the same or equivalent parts. Agent Nobu Tameno - (1 other person)

Claims (1)

[Claims] (11) In a silent discharge ozone generator in which a discharge portion is cooled by air, there is provided a detector for detecting cooling air temperature; A ratio setter that outputs a value according to air temperature, a transducer that detects discharge power, and an electric cabostation that compares the indicated values of the ratio setter and the transducer and generates a voltage adjustment signal. The air-cooled ozone generator according to claim 1. (3) The voltage adjustment signal is given as a forward/reverse rotation signal of the driving motor of the induction voltage regulator. The air-cooled ozone generator according to scope 2.