JP2663784B2 - Sterilization method of aseptic filling container with ozone water and spray nozzle for ozone water sterilization - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sterilizing a container for aseptic filling (aseptic) with ozone water and a spray nozzle used for the same, and more particularly to ozone water before ozone water is supplied to the inner surface of the container. TECHNICAL FIELD The present invention relates to a sterilization method capable of preventing the decomposition of a container, sterilizing the entire inner surface of the container at a low flow rate and in a short time, and a sterilization spray nozzle used for the sterilization method.

[0002]

2. Description of the Related Art Conventionally, in the production of sealed packaged foods, the contents are filled in a container, the container is sealed, and the sealed package is heated and sterilized in a device called a retort. Although hot-packing and hot-sealing methods (hot packs) are widely used, these methods are intended to prevent tissue destruction due to excessive heating of the contents, disintegration of vitamins and pigments, and deterioration such as browning. There is a problem that arises.

In order to solve this problem, the contents are sterilized at a high temperature for a short time outside the packaging container by means of heat exchange or the like, and the sterilized contents are filled in a sterilized or sterilized packaging container. Methods for sealing are known.

An aqueous solution containing hydrogen peroxide or peracetic acid is used commercially for sterilization of aseptic containers. In this case, however, a large amount of sterile water must be used for rinsing and the like. is there.

It is already known that ozone-containing gas and ozone water have a sterilizing ability. However, since the sterilizing process takes a long time, the ozone-containing gas is used for sterilization in refrigerators and sterilization of air conditioning equipment. Ozone water has been put to practical use in the fields of water and sewage, human waste treatment, medical equipment, and the like.

[0006] The present inventors have previously found that the concentration of ozone used is an extremely important factor in sterilizing a sterile filled container, and water containing ozone at a certain critical concentration or more is applied to at least the inner surface of the container. By contacting, sterilization can be performed in a short time and reliably, and when ozone water is used for sterilization of packaging containers, filling of contents without skipping the washing process without affecting the contents. It was proposed that it could be submitted to the process.

[0007]

When ozone water is used for sterilization in a bottle, it is commercially important to bring the inside of the bottle into contact with the ozone water uniformly and uniformly with a small amount of use. For this purpose, it is conceivable to spray ozone water onto the inner surface of the bottle via a spray nozzle.

However, when the amount of sprayed water is small, the ozone water flows down a predetermined path on the inner surface of the bottle, so that it is difficult to uniformly and uniformly contact the inner surface of the bottle with the ozone water. This problem can be solved by increasing the amount of spray water, but the cost of ozone water required for sterilization increases,
There is also a cost problem that the cost required for wastewater treatment increases.

Further, a major problem that arises when spraying ozone water onto the inner surface of a bottle through a spray nozzle is that ozone water is decomposed when passing through the spray nozzle, resulting in a decrease in ozone concentration. Therefore, sterilization efficiency is reduced. This tendency is particularly remarkable when the ozone water is sprayed as fine droplets.

Accordingly, an object of the present invention is to solve the above-mentioned drawbacks caused by the conventional spraying of ozone water, to prevent the decomposition of ozone until the ozone water is supplied to the inner surface of the container, Moreover, it is an object of the present invention to provide a sterilization method capable of sterilizing the entire inner surface of a container in a short time and a spray nozzle for sterilization used for the method.

[0011]

According to the present invention, an upper wall,
Consists of side walls, lower and corners between upper and side walls.
An orifice pointing upward at substantially the center of the upper wall;
Horizontal orifice on side wall, diagonally downward at the bottom
Orifice, an orifice facing obliquely upward at the corner
With horizontal orifice, diagonally downward
Multiple orifices and diagonally upward orifices
When projected at equal intervals in the circumferential direction and on a horizontal plane,
The self-rotating nozzle, which is arranged so as to point in the direction inclined from the nozzle, is inserted into the bottle, ozone water is supplied to the rotating nozzle, and a spray of ozone water is sprayed on the inner surface of the bottle while rotating. Average flow velocity of V (cm / sec
c), the total cross-sectional area of the orifice of the rotary nozzle is A (c
where m ² ), spraying is performed so as to satisfy the following formulas: “Equation 1” 140 ≦ A × V ≦ 600 “Equation 2” A ≦ 0.85 and “Equation 3” V ≦ 1000 A method for sterilizing a container for aseptic filling with water is provided.

According to the present invention, there is also provided a sterilizing spray nozzle which is inserted into a bottle and used for spraying ozone water onto the inner surface of the bottle, wherein a liquid supply pipe having a flow path therein, and a liquid supply pipe tip. It consists rotary nozzle body and having a liquid reservoir connected to the liquid supply pipe passage therein and rotatably provided through a bearing section, rotating nozzle body, upper
Walls, side walls, lower and corners between upper and side walls
And an upwardly directed orifice substantially at the center of the upper wall.
A horizontal orifice on the side wall and a bevel on the bottom
Orifice facing downward, diagonally upward at the corner
Orifice, horizontal orifice, diagonally down
Orifices facing upward and diagonally upward facing each
Diameter when projected at equal intervals in the circumferential direction and on a horizontal plane
The orifices are arranged so as to point in a direction inclined from the direction, and the total cross-sectional area of each orifice is V (cm / sec) of the average flow rate of the ozone water , and the total cross-sectional area of the orifice of the rotary nozzle is A (cm ² ). The formula (1) 140 ≦ A × V ≦ 600 (Formula 2) A ≦ 0.85 and “Formula 3” V ≦ 1000 are satisfied. A spray nozzle is provided.

[0013]

According to the present invention, a spray nozzle is inserted into a bottle to be sterilized, and ozone water is sprayed on the inner surface of the bottle to sterilize the bottle. The first feature is to use a nozzle whose nozzle rotates by a reaction force at the time of spraying.

By rotating the bottle and the spray nozzle relatively, it is possible to uniformly and uniformly contact the inner surface of the bottle with the ozone water with a small amount of the ozone water used. However, a complicated mechanism is required for grasping the bottle and transmitting the rotational driving force, and when this is combined with a mechanism for inserting and withdrawing the spray nozzle, the mechanism becomes more and more complicated. On the other hand, if a self-rotating nozzle is used, a special rotation transmitting mechanism and a driving mechanism are not required, and since the rotation of the nozzle can be controlled by supplying and shutting off the ozone water, the operation and the apparatus are significantly simplified. You.

By the way, the problem that arises when the ozone water is sprayed onto the inner surface of the bottle by the spray nozzle is, as already pointed out, that when the ozone water passes through the spray nozzle, ozone is decomposed and the ozone concentration decreases. However, this results in a decrease in sterilization efficiency. In the present invention,
Assuming that the average flow velocity of the ozone water is V (cm / sec) and the total cross-sectional area of the orifice of the rotary nozzle is A (cm ² ), they satisfy “Equation 1”, “Equation 2” and “Equation 3”. Is the second feature. By this feature, ozone water is prevented from being decomposed until the ozone water is supplied to the inner surface of the container, with a small flow rate and in a short time,
Efficient sterilization can be performed.

The value of A × V in “Equation 1” corresponds to the flow rate Q (cm ³ / sec) of ozone water.
In FIG. 1 showing the nozzle setting conditions in the present invention, the horizontal axis represents V, and the vertical axis represents A. The conditions within the scope of the present invention are as follows:

## EQU4 ## A = 0.85

A = 140 / V

A = 600 / V and

## EQU7 ## A range surrounded by V = 1000.

That is, if the flow rate (A × V) is smaller than the above range, it becomes difficult to rotate the nozzle smoothly,
It becomes difficult to apply ozone water uniformly and uniformly to the entire surface of the bottle. On the other hand, if the flow rate (A × V) is larger than the above range, the ozone water consumption increases and the size of the ozone water generator becomes inconvenient, as compared with the same sterilization effect.

When the average flow velocity is larger than the above range,
Decomposition of the ozone water when passing through the nozzle is increased, and the concentration of the ozone water is reduced, thereby reducing the sterilizing effect. This tendency is also observed when the flow rate (A × V) is larger than the above range. Further, if the orifice cross-sectional area is larger than the above range, the ozone water consumption increases and the ozone water generation device becomes large in size as compared with the same sterilization effect, causing inconvenience.

In the nozzle of the present invention, a rotary nozzle main body is provided at the tip of a liquid supply pipe having a flow path therein through a bearing. Thereby, smooth rotation of the rotary nozzle main body becomes possible. A liquid reservoir connected to the liquid supply pipe flow path is formed on the inner surface side of the rotating nozzle body, and the rotating nozzle body is
A number of orifices are provided so as to pass from the liquid reservoir to the outer surface and to be directed to each part of the inner surface of the bottle when inserted into the bottle. Thereby, through the liquid supply pipe channel,
Ozone water supplied into the nozzle is distributed to each orifice via a liquid reservoir, and each part of the inner surface of the bottle, for example,
It is sprayed on the bottom, bottom corner, side wall, shoulder, etc.
The liquid reservoir stabilizes the supply of ozone water to each orifice even when the rotary nozzle body is rotating.

In the disinfecting spray nozzle of the present invention, the orifice, which is directed horizontally or obliquely, out of the plurality of orifices is mounted so that the nozzle body rotates when ozone water is jetted. Direction (match) the direction. Thereby, even when the amount of the sprayed ozone water is relatively small, the reaction force at the time of spraying the ozone water is effectively transmitted to the rotary nozzle main body, and the effective rotation of the rotary nozzle main body and thereby the inner surface of the bottle are sprayed. Uniform and uniform application of ozone water becomes possible.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows the side sectional structure of the spray nozzle for ozone water disinfection of the present invention, and FIG. 3 shows A, BB and C of FIG. In FIGS. 3B and 3C, which show a planar cross-sectional structure in FIG. 3C, the nozzle 1 roughly includes a liquid supply pipe 2, a rotary nozzle main body 3, and a rotary nozzle main body with respect to the liquid supply pipe 2. 3
Are rotatably and liquid-tightly connected. The liquid supply pipe 2 is formed to be hollow, and has a flow path 5 extending inside in the axial direction. A tapered portion 6 for connection is provided at a lower end of the liquid supply pipe 2, and a stepped portion 7 for locking a bearing is provided at an upper end thereof.

The rotary nozzle body 3 is formed of a cylindrical body having one end opened, and includes an upper wall 8, a side wall 9 and a lower part 10,
A corner portion 12 is provided between the upper wall 8 and the side wall portion 9. Inside thereof is a liquid reservoir 13 connected to the liquid supply pipe flow path 5. In the connection between the side wall 9 and the lower part 10, a recess 14 for locking the bearing is provided.

The rotary nozzle body 3 is provided with a number of orifices communicating from the inner surface to the outer surface. That is, in this specific example, the orifice 15 facing upward is provided substantially at the center of the upper wall 8, the orifice 16 is provided horizontally in the side wall 9, the orifice 17 is provided obliquely downward in the lower part 10, and the obliquely upward is provided in the corner 12. Oriented orifices 18 are provided respectively. The upwardly directed orifice 15 has an orifice shape in which the large-diameter orifice 19 and the small-diameter orifice 20 are provided in an adjacent relationship so as to form a bulge-shaped cross section. Is touched around its axis.

A plurality of orifices other than the upward orifice 15, that is, a plurality of horizontal orifices 16, a downward orifice 17, and an obliquely upward orifice 18, are respectively provided at equal intervals in the circumferential direction on the rotary nozzle body 2. When these orifices are projected on a horizontal plane, they are provided so as to point in a direction inclined from the radial direction.

It is generally preferred that the number of each of these orifices 16, 17, 18 is generally about 2 to 8.
Each of the orifices 16, 17, 18 has a diameter (R0) of the inner peripheral surface of the rotary nozzle body 3 when projected on a horizontal plane.
It preferably extends tangentially to a circle having a diameter (R1) substantially equal to or smaller than. Preferably, the ratio R1 / R0 is generally in the range of 0.7 to 1. It goes without saying that the outer diameter of the rotary nozzle body 3 must be such that it can be easily inserted into the mouth of the bottle.

In the present invention, as described above, the total cross-sectional area of each of the orifices 15, 16, 17, and 18 is represented by V (cm / sec) of the average flow velocity of the ozone water, and the total sectional area of the orifice of the rotary nozzle is represented by A ( cm ＾ 2), it is set so that “Equation 1”, “Equation 2” and “Equation 3” are satisfied. The cross-sectional area of the upwardly directed orifice 15 (A1) The ratio (A1 / A) to the total cross-sectional area of the orifice is generally preferably in the range of 0.08 to 0.25.

FIGS. 4 and 5 are schematic layout diagrams for explaining the ozone water disinfection method of the present invention.
Shows the state at the end of sterilization, and FIG. 5 shows the state at the start of spraying. The bottle 21 to be sterilized comprises a bottom 22, a bottom corner 23, a side wall 24, a shoulder 25 and a neck 26, and the neck 26 is provided with a support ring 27 for gripping the bottle. The bottle 21 is supplied to the rotary sterilizer 28 in an inverted state,
The support ring 27 is provided by the gripper 29 attached to the
Is gripped, swivels in the device 28, and is discharged out of the device after the sterilization process.

A pair with the gripper 29, and coaxially therewith,
A spray nozzle 1 for sterilizing ozone water is provided. The nozzle 1 is fixed to one end of a liquid supply pipe 38 via a joint 37a, and the other end of the liquid supply pipe 38 is connected to a hose 39 via a joint 37b. This hose 39
It is connected to an ozone water storage tank (neither is shown) via an on-off valve and a pump. In order to drive the nozzle 1 up and down, a rail 40 extending in the vertical direction is provided on the support base 36, and a liquid supply pipe support plate 42 is provided on this rail via a direct-acting bearing 41 so as to be able to move up and down. The liquid supply pipe 38 is fixed to the support plate 42. The support base 36 is provided with a nozzle moving air cylinder 43 provided with the drive shaft 30 for moving the liquid supply pipe support plate 42 up and down along the rail 40. These nozzle lifting / lowering drive mechanisms 43 and the like are driven so that the nozzle 1 is inserted into the bottle 21, performs a necessary vertical scanning operation, and then is pulled out of the bottle 21 . The mouth 35 of the bottle 21 is open so that drainage is easily performed. In the drawings, a single gripper and nozzle pair are shown for simplicity, but in an actual device, many pairs are circumferentially arranged around a rotary drive shaft. Should be understood.

When the bottle 21 is carried into the device 28,
The air cylinder 43 is driven, and the nozzle 1 is
("Fig. 5" at the start of spraying). Next, the on-off valve is opened, and the pump supplies high-concentration ozone water from the ozone water storage tank to the nozzle 1 through a series of liquid supply pipes. As a result, the ozone water is sprayed from the respective orifices of the nozzle 1 onto the inner surface of the bottle 21 , and the rotating nozzle body 3 of the nozzle 1 is rotated by the reaction force.

The spray from the upward orifice 15 is directed to the container bottom 22, the spray from the horizontal orifice 16 is directed to the container side wall 24, and the spray from the obliquely downward orifice 17 is directed to the container shoulder 25. And from the orifice 18 facing obliquely upward are directed to the container bottom corner 23, respectively. The upward-facing orifice 15 includes a large-diameter orifice 19 and a small-diameter orifice 20.
Bets since provided in adjacency, direction of spray subtly varied, yet rotates also the nozzle body, the container bottom
The spraying is performed evenly on 22 . The other parts of the container are uniformly sprayed by the rotation of the rotary nozzle body 3. In addition to the rotation of the rotary nozzle body 3, the vertical and horizontal scanning movement of the nozzle 1 is combined, so that uniform and uniform sterilization of the entire inner surface of the bottle 21 can be performed in a relatively short time with a small amount of ozone water. Become.

In the present invention, the sprayed ozone water does not stay in the bottle 21 but flows down along the inner wall of the bottle and is discharged out of the bottle from the mouth 35 thereof. Another advantage is that no extra time is required. After spraying a predetermined amount of ozone water, the on-off valve is closed, and the air cylinder 43 is driven to discharge the nozzle 1 out of the bottle 21 ("FIG. 4" at the end of sterilization). If desired, aseptic air can be blown into the bottle 21 by an air nozzle (not shown) to drain the water. The sterilized bottle 21 is sent from the device 28 to a sterile filling device (not shown) or the like.

In the sterilization method using ozone water according to the present invention,
Ozone water having an ozone concentration of 10 ppm or more, particularly 20 ppm or more is used. The concentration of ozone water is 2
~ 3ppm concentration, but recently 20 ~ 30p
The production of ozone water having a high concentration of pm has become possible. For example, high concentration ozone water used in the present invention is disclosed in
It can be obtained by using an ozone water producing apparatus described in Japanese Patent Application Laid-Open No. 9991/99.

Examples of the bottle include various bottles made of metal, glass, plastic and the like. INDUSTRIAL APPLICABILITY The present invention is particularly effective for disinfecting plastic bottles that easily undergo thermal deformation by heat sterilization. Suitable examples of such plastics are polyethylene, polypropylene,
Olefinic resins such as ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acryl ester copolymer, ionomer, ethylene vinyl alcohol copolymer: polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate / isophthalate copolymer Polyesters such as polymers: Nylon 6, Nylon 6, 6, Nylon 11, Nylon 12 and other polyamides: Polyvinyl chloride: Polyvinylidene chloride and the like. The bottle may be made of a single resin or a blend of two or more kinds, and may be a single layer or a multilayer. The bottle may be unstretched or uniaxially or biaxially stretched.
The internal volume of the bottle is generally in the range of 500 to 2000 ml.

In the spray sterilization method using ozone water according to the present invention, the inner surface of the container is treated with a sterilization value of 2D to 8D, particularly 3D to 6D.
Useful for sterilizing to D. 3D (d
“ecimal” means that the sterilization number is 10 ³ bottles / bottle. The required sterilization time differs depending on the inner volume of the bottle, the flow rate of the ozone water, and the required sterilization value. Generally, sterilization can be terminated in the order of 5 to 30 seconds. The effects of the present invention will be described in the following examples.

[0035]

Embodiment 1 The rotating nozzle of the present invention has an outer diameter of 28 m as shown in FIG.
m, 25 mm high aluminum alloy cylinder,
The orifice has a diameter of 2.7 mm and a diameter of 2 mm adjacent to the orifice at the center of rotation of the nozzle upper surface.
4 x 2 mm, 4 x 2 mm facing sideways on the nozzle side
Pieces, φ2m on the lower surface of the nozzle obliquely downward at 45 °
m are twisted in the same direction so that a rotational force is generated. The total cross-sectional area is 0.5 cm ² . Using this nozzle, a sterilization test was performed on a square PET bottle having an internal capacity of 2 liters. The nozzle was inserted 190 mm into the bottle as shown in FIG. 2 and sprayed with 20 ppm ozone water. 17 seconds after the start of spraying, the nozzle is lowered toward the bottle mouth (downward speed: 50 mm
/ Sec), and the spray was stopped 20 seconds after the start of spraying.
The flow rate of the ozone water at this time is 1250 ml / 5 seconds,
The average flow rate was 500 cm / sec. Immediately thereafter, aseptic air is blown into the bottle to discharge the residual ozone water droplets and ozone gas, and then sterile water is injected into the bottle to wash out the number of surviving bacteria and cultured. The number of surviving bacteria was calculated to determine the bactericidal value (D value). Table 1 shows the results. In addition, sterilized ozone water discharged from the bottle being sprayed was sampled, and the ozone water concentration was measured. Table 1 also shows the results.

Example 2 The flow rate of ozone water was 2160 ml / 5 seconds (average flow rate: 86
0 cm / sec), spray-sterilized in the same manner as in Example 1, and evaluated in the same manner. Table 1 shows the results.

Example 3 The flow rate of ozone water was set to 700 ml / 5 seconds (average flow rate: 280
cm / sec), sterilized by spraying in the same manner as in Example 1 and evaluated in the same manner. Table 1 shows the results.

Example 4 With the nozzles of Example 1, thirteen nozzles having φ2 orifice diameters of all φ1 were manufactured. At this time, the total cross-sectional area of the orifice was 0.159 cm ² . Using this nozzle, the flow rate of ozone water was set to 700 ml / 5 seconds (average flow rate: 8
Except for 80 cm / sec), spray sterilization was performed in the same manner as in Example 1, and evaluation was performed in the same manner. Table 1 shows the results.

Comparative Example 1 A non-rotating nozzle having one orifice with a diameter of 1.5 mm at the center of the upper surface of the nozzle and two orifices with a diameter of 3 mm inclined at 5 ° on both sides thereof and having a total sectional area of 0.161 cm ² Ozone water was sprayed at a flow rate of 1250 ml / 5 seconds (average flow rate: 1550 cm / second) from a position 20 mm below the mouth of the bottle for 20 seconds. Evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 2 The nozzle used in Comparative Example 1
90mm inserted and flow rate 1250ml / 5 seconds (average flow rate;
(1550 cm / sec) ozone water was sprayed for 20 seconds. Water could not be evenly sprayed on the inner surface of the bottle. Evaluation was performed in the same manner as in Example 1. Table 1 shows the results.

Comparative Example 3 The flow rate of ozone water was 650 ml / 5 seconds (average flow rate: 260
cm / sec), but spraying was carried out in the same manner as in Example 1, but the nozzle did not rotate and uniform watering could not be performed on the inner surface of the bottle. Evaluation was performed in the same manner as in Example 1. Table 1 shows the results.
Shown in

[0042]

[Table 1] Primary bacteria count: 2.0 × 10 ⁶ (bacterial species: Bacillus subtilis) Supply ozone water concentration: 20 ± 2 ppm * The collected ozone water concentration is expressed as a percentage of the supply ozone water concentration. * Sterilization value: The D value represents the number of sterilizations per bottle and means killing 10 D multiplied bacteria.

[Brief description of the drawings]

FIG. 1 is a graph showing setting conditions of a nozzle according to the present invention, in which the horizontal axis represents V and the vertical axis represents A.

FIG. 2 is a sectional view showing a side sectional structure of the spray nozzle for ozone water sterilization of the present invention.

FIG. 3A is a plan view showing a planar structure of the spray nozzle for ozone water disinfection of the present invention taken along line AA, and FIG.
FIG. 2 is a cross-sectional view showing a plan cross-sectional structure of the spray nozzle for ozone water disinfection of the present invention taken along line BB, and FIG. 3C is a cross-sectional view showing a planar cross-sectional structure of the spray nozzle for ozone water disinfection of the present invention taken along line CC. It is.

FIG. 4 is a schematic layout diagram showing a state at the end of sterilization in the ozone water sterilization method of the present invention.

FIG. 5 is a schematic layout diagram showing a state at the start of spraying in the ozone water sterilization method of the present invention.

[Explanation of symbols]

1 is a nozzle, 2 is a liquid supply pipe, 3 is a rotary nozzle body, 4 is a bearing, 5 is a flow passage, 6 is a tapered portion, 7 is a step portion for locking a bearing, 8 is a nozzle upper wall, and 9 is a nozzle side wall. Part 1
0 is a nozzle lower part, 12 is a nozzle corner part, 13 is a liquid reservoir, 14 is a bearing locking recess, 15 is an upward orifice, 16 is a horizontal orifice, 17 is a diagonally downward orifice, and 18 is diagonally upward. Orifices for orientation, 19 for large diameter orifices, 20 for small diameter orifices, 21 for bottles, 22 for bottle bottoms, 23 for bottle bottom corners, 24 for bottle side walls, 25 for bottle shoulders, 26 for bottle necks, 27 Is a support ring, 28 is a rotary type sterilizer, 29 is a gripper, 30 is a nozzle elevating drive shaft, 35 is a bottle mouth, 36 is a support base, 37a and 37b are joints, 38 is a liquid supply pipe, 39 is a hose, 40
Is a rail, 41 is a direct-acting bearing, 42 is a supply pipe support plate, and 43 is an air cylinder for nozzle movement.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-189727 (JP, A) JP-A-51-30074 (JP, A) JP-A-3-256829 (JP, A) 197483 (JP, A)

Claims (7)

(57) [Claims] An upper wall, a side wall, a lower wall, an upper wall, and a side wall.
The upper part of the upper wall
Orifice, horizontal orifice on said side wall, front
The orifice faces obliquely downward at the bottom, and the oblique
Orifice with upward facing and horizontal orifice
Orifice, diagonally downward orifice and diagonally upward
Multiple orifices are equally spaced in the circumferential direction and on a horizontal surface
Arranged to point in the direction inclined from the radial direction when projected
The self-rotating nozzle is inserted into the bottle, ozone water is supplied to the nozzle, and the spray of ozone water is sprayed on the inner surface of the bottle while rotating. At this time, the average flow rate of the ozone water is V (cm / sec). ), When the total cross-sectional area of the orifice of the rotary nozzle is A (cm ² ), the following expressions are satisfied: 140 ≦ A × V ≦ 600, A ≦ 0.85, and V ≦ 1000 A method for sterilizing a container for aseptic filling with ozone water, characterized by spraying. 2. The method according to claim 1, wherein the upwardly directed orifice has a large diameter orifice.
The fuzz and small-diameter orifice have a ball-shaped cross section.
Before having an orifice shape provided adjacent to the
2. The method according to claim 1, wherein said self-rotating nozzle is used. 3. The method according to claim 1, wherein the ozone water is water containing 10 ppm or more of ozone. 4. The method according to claim 1, wherein the sterilization by spraying is completed within 30 seconds. 5. The method according to claim 1, wherein the rotating nozzle is scanned up and down in the bottle to spray ozone water into the bottle. 6. A disinfection spray nozzle which is inserted into a bottle and used for spraying ozone water onto the inner surface of the bottle, wherein a supply pipe having a flow path therein and a bearing provided at a leading end of the supply pipe are provided. rotation nozzle body whether having a liquid reservoir connected to the liquid supply pipe passage therein and rotatably provided Te
Consisting of an upper wall, a side wall, a lower part and an upper part.
A corner portion between the wall and the side wall portion;
An orifice pointing upwards at approximately the center of the
Orifice, diagonally downward facing orifice at the bottom
And an orifice facing obliquely upward at the corner,
Horizontal orifice, diagonally downward orifice and
Multiple orifices facing obliquely upward are equally spaced in the circumferential direction.
And the direction inclined from the radial direction when projected on a horizontal plane
And the total cross-sectional area of each orifice indicates the average flow rate of the ozone water as V (cm / sec),
Assuming that the total cross-sectional area of the orifice of the rotary nozzle is A (cm ² ), the following formulas are satisfied: Expression 1 140 ≦ A × V ≦ 600 Expression 2 A ≦ 0.85 and Expression 3 Spray nozzle for ozone water sterilization, characterized in that it is set to: 7. The large-diameter orifice has an upwardly facing orifice.
The orifice and small-diameter orifice will have a ball-shaped cross section
Orifices provided adjacent to each other
The spray nozzle according to claim 6.