JPH0712843A - Microflow rate laminar flow generator - Google Patents

Abstract

PURPOSE:To provide a microflow rate laminar flow generator for generating a stabilized laminar flow at a microflow rate continuously for a long time with low power. CONSTITUTION:A high voltage generating circuit 10 applies a voltage of 13,000V or above between a conductive ceramic ring anode 5 and a needle cathode 6 movable on the central axis of the anode 5 to regulate the gap freely. Consequently, discharge takes place to generate an ion flow thus generating a laminar flow at microflow rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-velocity laminar flow generator used to continuously blow a stable low-level wind to various instruments for weather observation for a long time.

[0002]

2. Description of the Prior Art For the verification of the anemometer of the past meteorological observation,
In particular, it is necessary that there is little dripping in the wind speed.

As a blower used for this kind of slight air blow,
Conventionally, propeller type fans and the like have been used.

[0004]

Since the conventional blower of this type rotates the fan to generate wind, the turbulence of the wind is inevitably large. Therefore, the rectification blade causes less turbulence. The need has arisen. Also, since the rotating shaft is rotated by the motor, mechanical vibration cannot be removed, and it is difficult to obtain stable rotation for a long time under severe conditions such as unmanned mountain areas. There were some problems.

In view of the conventional problems described above, the present invention has been made for the purpose of providing a low-velocity laminar flow generator capable of continuously generating a stable low-velocity laminar flow with a small electric power for a long time. Is.

[0006]

The object of the present invention to solve the above-mentioned conventional problems and achieve the intended object is to provide a circular ring-shaped anode and a center of the ring-shaped anode. A low-velocity laminar flow generator comprising a needle-shaped cathode that moves on an axis and whose distance from the anode can be adjusted, and a DC high-voltage generator that generates a discharge between the positive and negative electrodes (claim 1). ) And in the apparatus, the ring-shaped anode is a cylinder formed of conductive ceramics (claim 2).
It is in.

[0007]

The low-velocity laminar flow generator of the present invention produces a silent discharge by applying a DC voltage of about 18,000 V or more between the positive and negative electrodes and operating the needle cathode to adjust the distance between the electrodes. Let The ions thus induced move in the direction of the electric force line by the electric field to form an ion flow, and this ion flow accelerates air, and a turbulent laminar flow is generated in the axial direction of the ring-shaped anode. At this time, the discharge amount can be adjusted by adjusting the discharge interval between the needle-shaped cathode and the ring-shaped anode, and the wind speed generated thereby can be adjusted.

Further, by using a conductive ceramic material for the anode, a slower and more stable laminar flow at low wind velocity can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is a casing made of an insulating material, and 2 is an insulating support substrate provided in the casing 1. An air intake 3 is opened on the side surface of the casing 1, and a blower opening 4 is opened on the end surface. A circular ring-shaped anode 5 made of a cylinder formed of a porous conductive ceramic material is installed inside the blower port 4 coaxially therewith.

In the casing 1, a needle-shaped cathode 6 is installed coaxially with the ring-shaped anode 5. The needle-shaped cathode 6 is made of a stainless steel rod, has a discharge needle 6a at the tip, is engraved with a screw 6b on the outer periphery, and has a knob 7 at the rear end.
Is provided, and the knob 7 is projected to the outside of the casing 1. Further, the needle-shaped cathode 6 is penetrated by a pair of supports 8 and 9 which are raised from the substrate 2, and a screw 6b is screwed to one of the supports 8, and the knob 7 is turned. As a result, it moves forward or backward in the axial direction, and the distance from the ring-shaped anode 5 changes. The knob 7 is provided with a scale 7a so that the depth of screwing into the casing 1 can be known by the scale 7a. Further, one support 8 is made of a conductive material, and an electric current is supplied to the needle-shaped cathode 6 through this support 8.

The ring-shaped anode 5 is composed of a porous conductive ceramic pipe, and this ceramic pipe is made of Fe ₂ O ₃ or MnO ₂ based on a low expansion ceramic raw material or a raw material which is easily sintered at a relatively low temperature. , A metal oxide such as CuO was added, and the outer surface of the cylinder body sintered in an oxidizing atmosphere was sintered with an Al ₂ O ₃ —SiO ₂ —MgO—SiC based raw material in a weak reducing atmosphere.

This pipe, when used as a discharge electrode, has a high-efficiency far-infrared radiation characteristic, is always in a dry state, and has a characteristic that it is not significantly affected by changes in humidity of the outside air.

A high voltage generating circuit 10 is attached below the substrate 2. As an example, this high voltage generator 10 boosts a DC power supply of about 12V, 300mA to 18000V by an oscillating circuit and a voltage doubler multistage circuit, the positive electrode side of which is a ring-shaped anode 5 and the negative electrode is a needle-shaped cathode through a support 8. 6
It is conducted to.

In the figure, 11 is a pilot lamp and 12 is a power jack.

In the low-velocity laminar flow generator configured as described above, a high voltage is applied between the ring-shaped anode 5 and the needle-shaped cathode 6 by the high-voltage generating circuit 10 to cause silent discharge between the both electrodes 5, 6. As a result, the ion flow that is attracted by the corona discharge moves in the direction of the electric force line by the electric field, the ion flow accelerates the air, and a slight wind laminar flow is generated from inside the ring-shaped anode 5 toward the blower port 4. . The wind speed at that time was the needle-shaped cathode 6.
Can be moved to adjust the discharge interval with the ring-shaped anode 5.

In the above-mentioned embodiment, the needle-shaped cathode 6 is made of stainless steel. However, other metal materials such as brass may be used, and the ring-shaped anode 5 is made of the above-mentioned ceramic material. A metal material such as copper may be used. In the case of a metal material, not only a tubular shape but also a ring in which a wire rod is formed into a ring shape may be used. Further, depending on the material of the ring-shaped anode and the size of the discharge interval, if the applied voltage between both electrodes is about 13,000 V or more, a slight breeze can be generated. In addition, by using the conductive ceramics as the ring-shaped anode as in the above-described embodiment, 1/3 to 1/1 compared with the case where the metal material is used.
By using a conductive ceramic that has a low wind speed reduced by about 4 and high-efficiency far-infrared radiation characteristics, the dry state of the electrode is always maintained, and it is not significantly affected by changes in humidity of the outside air. Stable wind speed can be obtained.

[0018]

As described above, in the present invention, the laminar airflow at a low wind speed is obtained by the discharge between the ring-shaped anode and the needle-shaped cathode, so that the rotational drive is not necessary and the stable airflow is achieved. Is obtained over a long period of time, and the generated blast is a highly stable laminar flow. Therefore, in unmanned mountainous areas, continuous micro-blasting with high stability for a long period of time under harsh conditions can be obtained, and the availability is very high.

Further, by using a porous conductive ceramic material for the ring-shaped anode, it is possible to obtain a more stable laminar flow at a low velocity at a low speed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an example of implementation of the present invention.

FIG. 2 is a perspective view seen from the picking side of the above.

FIG. 3 is a perspective view as seen from the blower port side.

[Explanation of symbols]

 1 Casing 2 Support substrate 3 Air intake 4 Blower 5 Ring-shaped anode 6 Needle-shaped cathode 6a Discharge needle 6b Screw 7 Knob 7a Scale 8, 9 Support 10 High voltage generation circuit

Claims (2)

[Claims] 1. A circular ring-shaped anode, a needle-shaped cathode which is movable on the central axis of the ring-shaped anode and whose distance between the anode and the anode is adjustable, and a DC high voltage which causes discharge between the positive and negative electrodes. A low-velocity laminar flow generator including a voltage generating circuit. 2. The low-velocity laminar flow generator according to claim 1, wherein the ring-shaped anode is a cylinder formed of conductive ceramics.