JPH0845452A - Ion balance measuring device and measuring method for the balance - Google Patents

Abstract

PURPOSE:To easily and accurately evaluate the performance of an ion generator by connecting one end of each of power supplies to opposed electrode plates, so as to reverse polarity, and providing an ammeter between the connection point and the earth. CONSTITUTION:This ion balance measurement device has a positively charged electrode plate 1a and a negatively charged electrode relative to the earth 15, laid at the prescribed interval, and an ammeter 5 is laid between the connection point of power supplies 3 and 4, and the earth 15. As a result, voltage is applied to the electrode plates 1a and 1b respectively from the power supplies 3 and 4. Certain electrical field is, therefore, generated across the plates 1a and 1b, due to the voltage. In this condition, when ionized gases 7 are blown into space between the plates 1a and 1b, positive ions are attracted to the plate 1b and finally deposited In other words, current 9 flows from the plate lb toward. the earth 15, and the value ' is measured with the ammeter 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ion balance measurement for easily and accurately evaluating the performance of an ion generator.

[0002]

2. Description of the Related Art To evaluate the performance of ion balance in a conventional ion generator, as shown in FIG. 2 (a), one electrode plate 1 is initialized to the ground potential and generated by an ion generator (not shown). After spraying the ionized gas 7 shown in FIG.
It was performed by measuring the charging voltage with a special voltmeter 12 as shown in (b).

That is, as shown in FIG. 2 (a), the electrode plate 1 is once connected to the earth 15 and then separated from the earth 15, and as shown in FIG. 2 (b), the ionized gas 7 is sprayed for a certain time T. After that, it was an indirect measurement such as measuring the charging voltage V. Therefore, in this method, it was necessary to wait for the charging voltage V to settle down to a constant value, and it took a lot of measurement time for one performance evaluation (generally several seconds to several tens of seconds).

Further, for example, in the case of trying to evaluate the ion balance of three types (three units) of ion generators, FIG.
Even if the change of the charging voltage V due to the spraying of the ionized gas 7 shows different characteristics such as A, B, and C as shown in (b), after spraying the ionized gas 7 for a certain time T, Of the same charging voltage V, was evaluated as an ion generator with the same performance with respect to ion balance.

Further, even with a measuring instrument capable of directly measuring the amount of ions, after measuring the amount of positive ions and the amount of negative ions,
The difference was calculated. For example, if the true value of the positive ion amount is 100, the true value of the negative ion amount is 99, and the measurement error of the ion amount is about 1%, the positive ion amount is 99-
101, and the amount of negative ions is measured as 98 to 100. Here, the true value of the difference between the amount of positive ions and the amount of negative ions is (positive ion amount 100) − (negative ion amount 99) = 1. 99)
-(Negative ion amount 100) = -1, resulting in an inconvenient measurement result.

Therefore, when the measurement error between the amount of positive ions and the amount of negative ions is at the same level as the difference between the amount of positive ions and the amount of negative ions to be obtained, the measurement error of the ion balance becomes extremely large. There was a drawback.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned inconvenience in an apparatus for measuring the balance of the amount of ions generated by an ion generator. It is intended to provide an ion balance measuring device and a measuring method which can be easily and accurately known by directly measuring the difference between the amount of negative ions and the amount of negative ions.

[0008]

FIG. 1 is a circuit diagram showing an embodiment of the present invention. The ion balance measuring device using this is the electrode plate 1 in which a positive voltage is applied to the earth 15.
a and an electrode plate 1b to which a negative voltage is applied are arranged at regular intervals, and an ammeter 5 is connected between a connection point between the power sources 3 and 4 and the ground 15.

Since voltages are applied to the electrode plate 1a and the electrode plate 1b by the power source 3 and the power source 4, respectively,
Due to this voltage, a constant electric field is generated between the electrode plates 1a and 1b.

In this state, when the ionized gas 7 is blown between the electrode plates 1a and 1b, the positive ions 8 are attracted to the electrode plate 1b as shown in FIG.
Attach to b. That is, a current 9 flows from the electrode plate 1b toward the ground 15, and the current value is measured by the ammeter 5.

On the other hand, the negative ions 10 are attracted to the electrode plate 1a and eventually adhere to the electrode plate 1a. That is, the current 11 flows from the earth 15 toward the electrode plate 1a, and the current value is similarly measured by the ammeter 5. Due to this phenomenon, a current proportional to the difference between the positive ion amount and the negative ion amount flows in the ammeter 5.

As described above, in an ionized gas in which positive ions and negative ions are mixed, the above two actions occur simultaneously,
A current proportional to the difference between the amount of positive ions and the amount of negative ions can be directly measured as the ion balance. The negative ions also include electrons.

[0013]

As described above, according to the present invention, since the difference between the amount of positive ions and the amount of negative ions can be directly measured, the performance of ion balance in the ion generator can be evaluated easily in a short time. is there.

Further, since only the difference between the amount of positive ions and the amount of negative ions is handled, there is a feature that when this value is small, the accuracy is not deteriorated even if it is amplified if necessary.

Further, by using it in combination with an ion generator capable of varying the amount of ions, it is possible to construct a system in which the disruption of ion balance is extremely small, and so on.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram used in an ion balance measuring apparatus showing an embodiment of the present invention.

FIG. 2 is a circuit configuration diagram in a conventional measuring method, in which (a) shows an initial state and (b) shows a measuring state.

3A and 3B are characteristic diagrams of a conventional measurement method.

[Explanation of symbols]

 1a, 1b ... Electrode plates 3, 4 ... Power supply 5 ... Ammeter 7 ... Ionized gas 9 ... Positive ion current 11 ...・ ・ ・ Negative ion current 15 ・ ・ ・ ・ ・ Earth

Claims (2)

[Claims] 1. An electrode plate (1a) and an electrode plate (1b) are opposed to each other, and one end of a power source (3) and one end of a power source (4) are connected to the respective electrode plates so that polarities are opposite to each other, and the two An ion balance measuring device, characterized in that the other end of the power source is connected, and an ammeter (5) is connected between the connection point and the ground (15). 2. The ion balance measuring method according to claim 1, wherein the difference between the amount of positive ions and the amount of negative ions existing between the electrode plates is measured by an ammeter.