JP2006242541A - Highly-concentrated negative ion generating method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device capable of generating highly-concentrated negative ion with a simple means. <P>SOLUTION: High-pressure mixture jet flow of water and air is relatively collided with a propeller blade rotated at high speed by a horizontal shaft, and droplets in the mixture jet flow are atomized to generate highly-concentrated negative ion. The device for the same is composed of a transverse cylindrical container having an air supply opening at its one end and opened at the other end, a propeller type air supply rotor mounted at an air supply opening side in the container, and a two fluid nozzle mounted near a propeller end of the rotor in opposition thereto, and the device is further provided with a blast pump connected with the air supply opening, a driving mechanism for rotating the propeller type air supply rotor at high speed, and a supply pipe for supplying the air to one side of the two fluid nozzle and the water to the other side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for artificially generating high-concentration negative ions and an apparatus used for the method.

  In the atmosphere, negative ions are usually present, and it has been attracting attention as being effective for recovery from fatigue of the human body, mental stability, purification of blood, improvement of resistance, and enhancement of autonomic nerves. This is known as a phenomenon that occurs as a so-called Leonard effect in which ions are generated in nearby air when a water droplet collides with a metal plate and splits, and it is often seen in the vicinity of waterfalls and seaside shores in nature.

  Based on these findings, many attempts have been made to artificially generate negative ions, and so far, a water curtain made of mist has been generated by colliding water with a rotating body having a mesh. A method of bringing air into contact (see Patent Document 1), forming a water splitting part having a nozzle in a square tube, feeding air from the outside into this, causing the inside of the square tube to flow as turbulent flow, A device that spews water into this to produce fine water droplets (see Patent Document 2). High-speed, high-pressure water is jetted from the top of a long cylindrical container and collides with tourmaline or zeolite to generate negative ions. (Refer to Patent Document 3), water is atomized to generate ionized mist, and this ionized mist is brought into contact with a permanent electric dipole crystal mineral to increase the number of ions (special feature). Literature reference 4), the negative ion generator with an air jet nozzle which is arranged adjacent thereto and a water injection nozzle (see Patent Document 5) have been proposed.

JP-A-9-203540 (Claims and others) JP-A-10-160211 (Claims and others) JP 2004-3783 A (Claims and others) JP 2004-154461 A (Claims and others) JP 2004-313262 A (Claims and others)

  The present invention improves the problem that the negative ions generated by the conventional method are not always sufficiently high in concentration, and that a complicated structure is required to generate them. However, the object of the present invention is to provide a method and an apparatus capable of generating negative ions of high concentration by simple means.

  As a result of intensive studies to develop a simple method for generating a large amount of high-concentration negative ions, the present inventors have further developed fine water droplets ejected from a two-fluid nozzle, and further propeller-type rotor blades. We found that high concentrations of negative ions can be generated by spraying on the portion where the shear force near the end of the propeller is sprayed and atomizing, and at the same time creating a synergistic effect of miniaturization by turbulence. It came to complete.

  That is, the present invention is characterized in that a high-pressure mixed jet flow of water and air collides with a propeller blade rotating at high speed by a horizontal axis to atomize water droplets in the mixed jet flow. Concentration negative ion generation method, horizontal cylindrical container having an air supply port at one end and the other end opened, a propeller-type blowing rotor disposed on the air supply port side in the container, near the propeller end of the rotor blade The air pump is composed of a two-fluid nozzle arranged opposite to the air pump, and is connected to the air supply port. The driving mechanism for rotating the propeller-type air blowing rotor at high speed and one of the two-fluid nozzles, and the other The present invention provides a high-concentration negative ion generator characterized in that each supply pipe for supplying water is attached.

Next, the method and apparatus of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic sectional view showing an example of a horizontal negative ion generator of the present invention. One end plate 1 a of a cylindrical container 1 is provided with an air supply port 2 and is blown into a cylinder by a blower pump 3. Air is supplied, and this air passes through the inside of the cylinder and is discharged to the outside from the opening 4 formed in the other end plate 1b.

  Inside the cylindrical container 1, a blowing propeller type rotary blade 5 driven by a rotary motor 6 is arranged in a vertical direction, and a two-fluid nozzle 7 is arranged facing the vicinity of the end of the rotary blade 5. Water is supplied from the water storage tank 8 to the inner cylinder, and compressed air is supplied from the pressurized tank 9 to the outer pipe.

The jet flow composed of a mixture of air and water jetted from the two-fluid nozzle 7 collides with the propeller-type rotor blade 5 that rotates at high speed, and the water droplets therein are more finely divided, and a high concentration is obtained by the Leonard effect. Generates negative ions.
FIG. 2 is a schematic sectional view showing an example of a collision type two-fluid nozzle.

In this way, water droplets having a particle size of about 3 μm formed when ejected from the two-fluid nozzle 7 are further finely divided by the rotary blade 5 and atomized to become mist of the order of nanometers.
In the method of the present invention, it is necessary to use a cylindrical container in a horizontal shape. When the cylindrical container is used in a vertical shape, the atomization efficiency is lowered, and a part of the liquid drops in a water droplet state.

  According to the method of the present invention, water droplets can be miniaturized to the extent that they cannot be measured by laser analysis, thereby obtaining air containing negative ions having a concentration of around 150,000 per ml. Further, 0.005-0.1% by mass, preferably 0.01-0.04% by mass of a tropolone compound such as Hiba essential oil is added to the supplied water to generate 400,000 negative ions per ml. can do.

  As the Hiba essential oil, Hiba wood flour or Hiba waste produced during saw milling is used as sawdust, and the oil layer separated from the oil-water mixture collected by steam distillation is purified to a fraction around 253 ° C. (specific gravity about 0). .93) is preferably used. The essential oil thus obtained is light yellow and contains 1 to 20% by mass of hinokitiol.

  Next, FIG. 3 is an explanatory diagram for explaining the principle of an air ion measuring apparatus based on the Gel Dien method used for quantifying negative ions obtained by the method of the present invention. This apparatus comprises an electrically isolated outer cylinder (applied voltage cylinder) 11 and an inner cylinder (collecting electrode cylinder) 12. The outer cylinder 11 is connected to a DC power source 14, and the inner cylinder 12 is connected to an electrometer 13. It is. Air containing air ions is flowed between the double cylinders in the axial direction at a constant flow rate. When a negative current is applied to the outer cylinder 11, negative ions in the air passing between the double cylinders are captured by the cylinder, and the current flowing through the inner cylinder 12 gradually increases, but passes through the point P. Under the applied voltage at which ions are trapped at point T, all the ions that enter the inner cylinder 12 are captured by the inner cylinder 12. Under a higher applied voltage, the current flowing through the inner cylinder 12 becomes a constant value.

FIG. 4 is a graph showing the relationship between the voltage applied to the outer cylinder 11 and the current flowing through the inner cylinder 12. In FIG. 4, the current flowing through the inner cylinder 12 that increases with the applied voltage is referred to as ohm current, and the constant current that flows through the inner cylinder even when the applied voltage is increased is referred to as saturation current. If the mobility of negative ions is ka, the mobility of ions in which all negative ions are trapped is called critical mobility (kc), and kc is given by equation (1).
kc = [F / (4π · aV)] (1)
F: Air flow rate (cm ³ / sec)
V: Applied voltage a: Device constant

Further, the negative ion number density 1 is given by the equation (2) from the average current flowing for a certain time in the saturation current.
[D] = [I / (e × F)] (2)
In the above equation, [D]: negative ion density per cm ³
F: Air flow rate (cm ³ / sec)
e: Charge amount of one electron (1.6 × 10 ^-17 coulomb)
I: Average current (coulomb / second) flowing for a certain time at saturation current

The value of I in equation (2) is obtained from equation (3) from the amount of charge Q (coulomb) accumulated in the inner cylinder at a fixed time t (seconds) in measurement.
I = (Q / t) (3)

In actual measurement, an ion measuring machine is placed at a distance of 1.5 m from a generator of air ions (mixed air of positive ions and negative ions). Air from the generator is introduced into the measuring machine at a constant speed, and 0 _bolt is sandwiched between the outer cylinder 11 and a voltage is applied according to the next cycle for a certain time (t seconds).
0 → + 40 → 0− + 60 → 0 → + 100 → 0 → + 120 → 0 → + 140 → 0 + 160 → 0 → −40 → 0 → −60 → 0 → −80 → 0 → −100 → 0 → −120 → 0 → − 140 → 0 → −160.
From the Q value accumulated in the inner cylinder 12 in the above cycle, the positive ion number density and the negative ion number density are obtained by the equations (3) and (2). From the I curve, the ion number densities [D ⁺ ] and [D ⁻ ] are obtained from the saturation current value I by the equation (2).

  The negative ion generator according to the present invention is small and efficiently generates high-concentration negative ions that cannot be obtained in the past, so it is equipped in gathering halls, movie theaters, theaters, stores, amusement halls, nursing homes, etc. where many people gather. When this happens, the negative ions in the room increase, giving the people gathered here an exhilarating feeling, without catching a cold, etc., helping to maintain health, and deodorizing and sterilizing the room environment.

  Next, the best mode for carrying out the present invention will be described by way of examples, but the present invention is not limited to these examples.

  In FIG. 1, the following experiment was performed using a rotor blade having a blade length of 300 mm and a rotation speed of 3000 rpm, and using “BIMJ series internal mixing nozzle” manufactured by Ikeuchi Co., Ltd. as a two-fluid nozzle.

  The use conditions of the air ion generator are as follows: the pressure of compressed air is 0.15 MPa, the amount of compressed air released is 22 nl / min, and the amount of spray is reduced to 1.8 liters / hr. The average particle size of the fine mist at this time is 25 μm in terms of the Sauder average particle size by the immersion method from the chart attached to the nozzle.

  Table 1 shows the measured values of the number of air ions in the air that was further finely divided by the turbulent air flow in the cylinder caused by further colliding the mist-like aerosol ejected from this nozzle with the rotor blades. Table 1 shows the effect of the rotational speed of the rotor blades on the number of air ions.

  As can be seen from Table 1, the generation of negative ions by the method of the present invention shows a value about four times that of the conventional generation of negative ions by splitting water ions from 40,000 to 50,000.

  The apparatus used in Example 1 has a compressed air pressure of 0.15 MPa, a compressed air discharge rate of 22 nl / min, a spray rate of 1.8 liters / hr, an air blade rotation speed of 700 rpm, and a small amount of hiba in water. The effect on the number of air ions when oil is added is determined and shown in Table 2.

  As can be seen from Table 2, the addition of around 0.05% of Hiba oil helps increase the number of negative ions, while the increase rate of positive ions is lower than the increase rate of negative ions.

Comparative Example For comparison, the number density of air ions generated when a mixture of fine water droplets and air ejected using one fluid nozzle collided with a rotor blade was determined. Since a single fluid nozzle has larger water droplets ejected from the nozzle than a two-fluid nozzle, it is necessary to increase the degree of pressurization to water in order to reduce the particle size, which increases the amount of water used. . Accordingly, the water droplet collides with the inner wall of the inner cylinder and becomes a drain. The nozzle used in this example is “Small injection type nozzle of JJXP full cone nozzle” manufactured by Ikeuchi Co., Ltd. This nozzle has a mechanism in which compressed water collides and flows into the nozzle. In this apparatus, water was compressed to 0.5 Mpa among nozzles of the JJXP series, and equipped with an ejection amount of 0.09 to 2.09 liter / min.

As operating conditions, when water is compressed to 0.5 MPa and the ejection amount is 0.09 liter / min, the particle size of the water droplet is 200 μm from the chart attached to the nozzle.
Table 3 shows the effect of the rotational speed of the rotor blades in the cylinder on the generation of air ions under these conditions.

  As can be seen from this table, the water splitting by the one-fluid nozzle is lower than that of the two-fluid nozzle, so the mist diameter is about two orders of magnitude lower than that of the two-fluid nozzle. Therefore, the effect of increasing the rotor blades is not sufficient, and the negative ion concentration is low.

Comparative Example 2
Table 4 shows the state of air ion generation when Hiba oil is added to water when the rotational speed of the rotor blade is 1300 times and the water pressure is 0.5 Mpa and the pressure is 0.09 liter / min in Comparative Example 1. .

  As can be seen from this table, Hiba oil has the effect of lowering the positive ion number density and increasing the negative ion number density even in the one-fluid nozzle, but the absolute number of negative ions generated is significantly higher than in the two-fluid nozzle. Low.

  The same air ion generator as in Example 1 was used, and a guard type nozzle having a structure in which fine mists ejected from two internally mixed two-fluid nozzles collided obliquely with each other was used. As this nozzle, a small spray type AKIJet developed by Ikeuchi Co., Ltd. was used. The characteristics of the guard-type two-fluid nozzle are that the particle size of the fine mist ejected is uniform compared to a single two-fluid nozzle, and a large amount of fine mist can be generated. By controlling the conditions, it is possible to obtain a mist having an average particle diameter of 10 μm by measuring the particle diameter by a laser analysis method.

  As a condition, a fine mist having an average particle diameter of 10 μm was obtained by narrowing a fine mist obtained with compressed air of 0.4 Mpa and 660 nl / hr to an ejection amount of 20 liter / hr. The aerosol was further finely divided by a rotor blade to obtain air ions. Moreover, the air ion when 0.043% of hiba was added to the water to be split under these conditions was analyzed by the gel deien method. The results are shown in Table 5.

As can be seen from Table 5, the negative ion generation method based on the water splitting method can provide a value of 200,000 ions / cm ³ or more, which was not obtained by the conventional method. Addition of a small amount (0.043%) of Hiba oil to water significantly reduced the positive ions, and it was possible to obtain a value close to 500,000 / cm ^{3 for} negative ions.

  The present invention is equipped with a narrow space such as a private house, a beauty salon, a hospital room, etc., and forms a very high concentration negative ion environment in the room, thereby positively improving the health of people in these places. It can also be used for growth promotion in animal breeding, plant greenhouse cultivation and the like.

1 is a schematic cross-sectional view showing an example of a horizontal negative ion generator of the present invention. FIG. 3 is a schematic cross-sectional view showing an example of a collision type two-fluid nozzle. Explanatory drawing for demonstrating the principle of the measuring apparatus of the air ion based on the gel deien method used in order to quantitate a negative ion. The graph which shows the relationship between the applied voltage to the outer cylinder 11, and the electric current which flows into the inner cylinder 12. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical container 1a, 1b End plate 2 of a cylindrical container 2 Air supply port 3 Blower pump 4 Opening port 5 Rotor blade 6 Rotating motor 7 Two-fluid nozzle 8 Water storage tank 9 Pressurization tank 11 Outer cylinder 12 Inner cylinder 13 Electrometer 14 DC power supply

Claims (3)

  A method for generating high-concentration negative ions, characterized in that a high-pressure mixed jet of water and air collides with a propeller blade rotating at high speed on a horizontal axis to atomize water droplets in the mixed jet.   The method for generating high-concentration negative ions according to claim 1, wherein 0.005 to 0.1% by mass of Hiba oil is contained in the water in the mixed jet stream. A horizontal cylindrical container having an air supply port at one end and an open end at the other end, a propeller-type blowing rotor disposed on the air supply port side in the container, and disposed near the propeller end of the rotor blade For supplying air to one of the two-fluid nozzles and air to the other, and a blower pump connected to the air supply port, connected to the air supply port A high-concentration negative ion generator characterized in that each supply pipe is attached.

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