JP5927487B2 - Ozone generator - Google Patents

Description

  The present invention relates to an ozone generator.

  An apparatus for generating ions and ozone using corona discharge includes a discharge electrode, a counter electrode, and a high voltage generator. Therefore, many inventions have been made on electrode shapes, high voltage generators, and control methods thereof.

  Among such prior arts, there is one in which ions and ozone are blown out from a blowout port with a simple configuration without applying a propulsive force such as wind from the outside (see, for example, Patent Document 1).

  FIG. 5 shows a schematic side sectional view and a front view of a conventional ion generator. As shown in FIG. 5, a ground electrode 122 and a ground electrode 122 for generating ions by corona discharge in the air are provided, and a ground is formed so as to surround a virtual extension line M obtained by extending the axis of the needle electrode 121. An electrode 122 is disposed. A part of the outer periphery surrounding the virtual extension line M of the ground electrode 122 having a surrounding shape surrounding the virtual extension line M is opened to form an open portion 126.

JP 2002-164148 A

  However, the conventional configuration has the following problems.

  Since the ground electrode 122 is disposed so as to surround the virtual extension line M obtained by extending the axial center of the needle electrode 121, the electric force lines of the needle electrode are directed forward of the needle tip. Therefore, ions generated by corona discharge travel toward the ground electrode 122. An open portion 126 is formed by opening a part of the outer periphery surrounding the virtual extension line M of the ground electrode 122 having a surrounding shape surrounding the virtual extension line M, but the ions still remain in the ground electrode 122. It will turn strongly and the amount of ozone emission will not increase. For this reason, if the opening 126 is increased to increase the amount of ozone released, the ground electrode 122 becomes smaller and the intensity of discharge becomes weak, making it impossible to increase the amount of ozone. Also, when the applied voltage is increased to increase the amount of ozone, the amount of air ions increases and the air that is blown out is charged, and the wall surface of the room is charged by the charged air. It becomes easy to adhere and causes wall dirt.

  The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an ozone generator that secures the amount of ozone and suppresses the amount of ions.

In order to solve the above-described conventional problems, the present invention provides an ozone generator that generates ozone by generating a corona discharge by applying a voltage of 3.5 kV between a discharge electrode and a counter electrode. A needle electrode, the counter electrode is a cylindrical electrode centered on the axis of the needle electrode , the needle electrode is arranged so as not to penetrate the counter electrode, and the tip of the discharge electrode The distance to an arbitrary point on the end face close to the tip of the discharge electrode in the circular end face of the counter electrode is set to 5.5 mm to 6.5 mm.

  Thereby, it can be set as the ozone generator which suppressed the amount of ions while ensuring the amount of ozone.

  The ozone generator of the present invention can suppress the amount of ions while securing the amount of ozone. Therefore, when mounted on an air conditioner or the like, the ozone generator suppresses contamination of the wall surface due to air charging caused by ions, The effects of sterilization and deodorization can be added to the air conditioner.

1 is a schematic perspective view of an ozone generator according to Embodiment 1 of the present invention. Schematic cross-sectional view of an air conditioner equipped with the ozone generator (A) Graph of discharge distance and discharge current of the ozone generator, (b) Graph of discharge distance and wall charging of the ozone generator. (A) Graph of the angle and discharge current of the ozone generator, (b) Graph of the angle and wall charging of the ozone generator (A) Schematic side sectional view of conventional ion generator, (b) Front view

A first invention is an ozone generator that generates ozone by applying a voltage of 3.5 kV between a discharge electrode and a counter electrode to generate corona discharge, wherein the discharge electrode is a needle electrode, and the counter electrode Is a cylindrical electrode centered on the axial center of the needle electrode , the needle electrode is arranged so as not to penetrate the counter electrode, and the circular end surface of the counter electrode from the tip of the discharge electrode By setting the distance to an arbitrary point on the end face close to the tip of the discharge electrode from 5.5 mm to 6.5 mm, air such as ions can be obtained while disinfecting and deodorizing while ensuring the amount of ozone. Charging can be suppressed, and dirt on the wall can be suppressed.

The second invention is a line segment that connects the tip end portion of the discharge electrode and the end face close to the tip end portion of the discharge electrode among the circular end faces of the counter electrode with the shortest distance, in the first invention. By making the angle of the line segment perpendicular to the axial direction of the discharge electrode from 45 degrees to 55 degrees, the air charge of ions and the like is suppressed while ensuring the amount of ozone and performing sterilization and deodorization. And can suppress the dirt on the wall.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a schematic perspective view of an ozone generator according to the first embodiment of the present invention. FIG. 2 is a schematic sectional view of an air conditioner equipped with the ozone generator.

  As shown in FIG. 2, the air conditioner includes an indoor unit 11, an inlet 12, a heat exchanger 13, a blower 14, an outlet 15, an ozone generator 3, and a conduit pipe 16. ing. Such an air conditioner introduces air into the interior through the inlet 12 of the indoor unit 11 and heat-exchanges the introduced air with the heat exchanger 13. The heat-exchanged air passes through the blower 14 and is blown into the room from the outlet 15.

  The ozone generator 3 is provided in the vicinity of the outlet 15 via the conduit pipe 16, and the ozone generated from the ozone generator 3 is attracted by the wind of the wind from the blower 14, and the ozone is generated from the outlet 15. It is discharged into the room together with the wind of the blower 14.

The ozone generator 3 generates ozone by generating a corona discharge by applying a negative high voltage between the discharge electrode 1 and the counter electrode 2 shown in FIG. 1 by the high voltage generator 4 shown in FIG. Is. The range of the DC voltage applied from the high voltage generator 4 is -3 kV to -4.
The current flowing between the electrodes is set to be in the range of 1 μA to 30 μA. By controlling the high voltage generator 4 to the above voltage and current, the amount of ozone generated from the ozone generator 3 is controlled to a level necessary and optimum for sterilization and deodorization performance, and air charging such as ions is performed. To suppress dirt on the walls.

  As shown in FIG. 1, the discharge electrode 1 of the ozone generator 3 is a needle-like electrode with a sharp tip, and the counter electrode 2 is a ring-shaped electrode.

  Examples of the material for the discharge electrode 1 and the counter electrode 2 include stainless steel, nickel, aluminum, copper, and tungsten. Stainless steel is general-purpose and desirable from the viewpoint of workability.

  The shape of the discharge electrode 1 is a needle shape having a sharp tip, and the sharper the tip, the smaller the amount of ozone generated. The discharge electrode 1 may have a diameter of 0.3 mm or more and 2 mm or less. If it is less than 0.3 mm, it is difficult to make a difference from the tip. If it is larger than 2 mm, processing becomes difficult.

  The shape of the counter electrode 2 is a ring shape, and the distance from the discharge electrode 1 is substantially equal, so that a uniform discharge can be performed on the counter electrode 2 and efficient discharge becomes possible. The plate | board thickness of the counter electrode 2 should just be 0.3 mm or more and 1 mm or less. If it is less than 0.3 mm, the strength becomes weak, and the shape is likely to be deformed during the manufacturing process. If it is larger than 1 mm, it is difficult to process.

  3A is a graph of the discharge distance and discharge current of the ozone generator 3, and FIG. 3B is a graph of the discharge distance and wall charging of the ozone generator 3. FIG.

  First, as shown in FIG. 3 (a), when the inter-discharge distance L, which is the distance from the tip of the discharge electrode 1 to the counter electrode 2, is increased from 5.5 mm, the discharge current decreases and the discharge current becomes 10 μA. When the distance between discharges L7.5 mm is as follows, the amount of ozone generated is considerably reduced. Further, as shown in FIG. 3B, when the distance L between discharges is increased from 5.5 mm, the wall charging does not change when the distance L between discharges is 5.5 mm and 6.5 mm. When the distance L is set to 7.5 mm, the amount of air ions increases and the wall charge increases rapidly. Therefore, by setting the distance L between discharges to 5.5 mm or 6.5 mm, wall charging can be suppressed and the amount of ozone can be secured.

  FIG. 4A is a graph of the angle and discharge current of the ozone generator 3, and FIG. 4B is a graph of the angle of the ozone generator 3 and wall charging.

  First, as shown in FIG. 4A, an angle α between a line segment connecting the tip of the discharge electrode 1 and the counter electrode 2 with the shortest distance and a line segment perpendicular to the discharge electrode 1 is set to 20 degrees and 50 degrees. When the angle α is 20 degrees and 50 degrees, the discharge current hardly changes. However, when the angle α is 80 degrees, the discharge current becomes 10 μA or less, and the amount of ozone generated is considerably reduced. End up. As shown in FIG. 4B, if the angle α is 20 degrees, 50 degrees, and 80 degrees, the amount of air ions increases and the wall charge increases when the angle α is 20 degrees and 80 degrees. End up. Therefore, by setting the angle α to around 50 degrees, wall charging can be suppressed and the amount of ozone can be secured.

  As described above, the ozone generator according to the present invention can suppress the amount of ions while ensuring the amount of ozone, suppress contamination of the wall surface due to air charging caused by ions, Since the effect of deodorization can be expected, it can be applied to household appliances such as air conditioners, washing machines, refrigerators, air purifiers, and in-vehicle applications.

1 Discharge electrode 2 Counter electrode 3 Ozone generator

Claims (2)

In an ozone generator that generates ozone by applying a voltage of 3.5 kV between a discharge electrode and a counter electrode to generate corona discharge, the discharge electrode is a needle electrode, and the counter electrode is an axis of the needle electrode A cylindrical electrode centered on the heart , arranged so that the needle electrode does not penetrate the counter electrode, and the tip of the discharge electrode out of the circular end surface of the counter electrode from the tip of the discharge electrode An ozone generator characterized in that the distance to an arbitrary point on the end face on the side close to 5 is set to 5.5 mm to 6.5 mm. An angle between a line segment connecting the end face of the discharge electrode and the end face on the side close to the tip end of the discharge electrode among the circular end faces of the counter electrode, and a line segment perpendicular to the axial direction of the discharge electrode The ozone generator according to claim 1, wherein the angle is set to 45 degrees to 55 degrees.