JPH05254522A - Sterilization of aseptic charging vessel by ozone water and sterilizing spray nozzle of ozone water - Google Patents

Abstract

PURPOSE:To prevent decomposition of ozone during the time until ozonized water is fed in a vessel and sterilize the whole inside face of the vessel at a low flow rate within a short time. CONSTITUTION:A self-rotating nozzle equipped with many orifices provided to point various spots in a bottle is inserted within the bottle. Ozonized water us supplied to the rotating nozzle to be sprayed to the inside face of the bottle while rotating the nozzle. In this time, the ozonized water is sprayed so as to satisfy the following formula: 140<=AxV<=600, A<=0.85, V<=1000, where V is average flow speed of ozonized water (cm/sec), A is total sectional area of orifice in rotating nozzle (cm<2>).

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 with ozone water and a spray nozzle used therefor, and more particularly to ozone before the ozone water is supplied to the inner surface of the container. The present invention relates to a sterilizing method capable of sterilizing the whole container inner surface at a low flow rate and within a short time, and a sterilizing spray nozzle used therefor.

[0002]

2. Description of the Related Art Conventionally, in the production of hermetically-sealed food, a method of filling the contents in a container, then hermetically sealing and heat-sterilizing the hermetically-sealed package in an apparatus called a retort, The method of hot filling and sealing (hot pack) is widely used. However, these methods cause damage such as tissue destruction due to overheating of the contents, decay of vitamins and pigments, and deterioration such as browning. There is a problem that it will occur.

As a solution to this problem, the contents are sterilized outside the packaging container at a high temperature for a short time by means such as heat exchange, and the sterilized contents are filled in a sterilized or sterilized packaging container, A method of sealing is known.

An aqueous solution containing hydrogen peroxide or peracetic acid is commercially used for sterilizing the aseptic container, but in this case, there is a problem that 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, but since ozone-containing gas has a long sterilization process, ozone-containing gas is used for sterilization in a refrigerator or 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.

The present inventors have previously found that the ozone concentration used is a very important factor for sterilization of aseptic filling containers, and water containing ozone at a certain critical concentration or more is applied to at least the inner surface of the container. By contacting, the sterilization can be performed reliably in a short time, and if ozone water is used to sterilize the packaging container, filling of the contents can be done without affecting the contents and cleaning process. It was proposed that it could be used for the process.

[0007]

When ozone water is used for sterilization in a bottle, it is commercially important to contact the inner surface of the bottle with the ozone water uniformly and evenly with a small amount. For this purpose, it is possible 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 fixed route on the inner surface of the bottle, so that it becomes difficult to contact the inner surface of the bottle with the ozone water uniformly and uniformly. Increasing the amount of water spray will solve this problem, but the cost of ozone water required for sterilization will increase,
There is also a cost problem that the cost required for wastewater treatment increases.

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

Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks that occur when conventional ozone water is sprayed, prevent ozone from being decomposed until the ozone water is supplied to the inner surface of the container, and reduce the flow rate. Moreover, it is an object of the present invention to provide a sterilization method capable of sterilizing the entire inner surface of a container within a short period of time, and a sterilization spray nozzle used therefor.

[0011]

According to the present invention, a self-rotating nozzle having a large number of orifices provided so as to be directed to respective portions on the inner surface of the bottle is inserted into the bottle, and ozone water is introduced into the rotating nozzle. Is supplied and the spray of ozone water is sprinkled on the inner surface of the bottle under rotation. At this time, when the average flow velocity of ozone water is V (cm / sec) and the total sectional area of the orifices of the rotating nozzle is A (cm ² ), A container for aseptic filling with ozone water, characterized in that spraying is carried out so as to satisfy the formula "Equation 1" 140 ≤ A x V ≤ 600 "Equation 2" A ≤ 0.85 and "Equation 3" V ≤ 1000. A sterilization method is provided.

Further, according to the present invention, in a sterilizing spray nozzle which is inserted into a bottle and is used for spraying ozone water on the inner surface of the bottle, a liquid supply pipe having a flow passage therein and a liquid supply pipe tip. A rotary nozzle body that is rotatably provided through a bearing and that has a liquid reservoir portion that connects to the liquid supply pipe flow path inside, and a bottle that is provided in the rotary nozzle body so as to communicate from the liquid reservoir portion to the outer surface. When a plurality of orifices are provided so as to be directed to each part of the inner surface of the bottle when inserted into the bottle, the orifices that are directed in the horizontal or diagonal direction of the orifice are when ozone water is ejected, The mounting direction of the nozzle body is oriented so as to cause rotation, and the total cross-sectional area of each orifice is such that the average flow velocity of ozone water is V (cm / sec), and the orifice of the rotating nozzle. When the Keidan area was A (cm ^2), it is set so as to satisfy the equation "number 1" 140 ≦ A × V ≦ 600 "number 2" A ≦ 0.85 and "number 3" V ≦ 1000 A spray nozzle for sterilizing ozone water 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. As the spray nozzle, a self-rotating nozzle and ozone water are used. The first feature is to use a nozzle that rotates due to the reaction force during spraying.

By rotating the bottle and the spray nozzle relatively, the inner surface of the bottle can be brought into contact with the ozone water uniformly and uniformly with a small amount of ozone water used. Requires a complicated mechanism for gripping the bottle and transmitting the rotational driving force, and when the mechanism is combined with the insertion-drawing mechanism of the spray nozzle, the mechanism becomes more and more complicated. On the other hand, when the self-rotating nozzle is used, a special rotation transmitting mechanism and a driving mechanism are not necessary, and the nozzle rotation can be controlled by supplying and shutting off ozone water, so that the operation and the device are significantly simplified. It

The problem that occurs when ozone water is sprayed onto the inner surface of a bottle with a spray nozzle is that, as already pointed out, ozone is decomposed when it passes through the spray nozzle, resulting in a decrease in ozone concentration. However, this leads to a reduction in sterilization efficiency. In the present invention,
When the average flow velocity of ozone water is V (cm / sec) and the total cross-sectional area of the orifices of the rotary nozzle is A (cm ² ), these should satisfy “Equation 1”, “Equation 2” and “Equation 3”. The second characteristic is to be specified in. With this feature, ozone is prevented from decomposing until the ozone water is supplied to the inner surface of the container, and the flow rate is low and within 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, which shows the nozzle setting conditions in the present invention, the horizontal axis represents V and the vertical axis represents A. The condition of the scope of the present invention is the following formula

[Equation 4] A = 0.85

[Equation 5] A = 140 / V

(6) A = 600 / V and

(7) It is the range surrounded by V = 1000.

That is, if the flow rate (A × V) is less than the above range, it becomes difficult to smoothly rotate the nozzle,
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 consumption of ozone water is increased and the ozone water generation device is increased in size as compared with the same sterilization effect, which causes inconvenience.

When the average flow velocity exceeds the above range,
Decomposition of ozone water when passing through the nozzle becomes large, the concentration of ozone water decreases, and the bactericidal effect decreases. This tendency is similarly observed when the flow rate (A × V) is larger than the above range. Further, if the orifice cross-sectional area becomes larger than the above range, the consumption of ozone water will increase and the ozone water generator will also become large in size, compared with the same sterilization effect, which will be inconvenient.

In the nozzle of the present invention, the rotary nozzle body is provided at the tip of the liquid supply pipe having the flow passage therein via the bearing. This allows the rotary nozzle body to rotate smoothly. A liquid reservoir is formed on the inner surface of the rotating nozzle body that connects to the liquid supply pipe flow path, and
A large number of orifices are provided so as to communicate with the outer surface from the liquid reservoir and to point to respective portions on the inner surface of the bottle when inserted into the bottle. As a result, through the liquid supply pipe flow path,
The ozone water supplied into the nozzle is distributed to each orifice via the liquid reservoir, and each portion on the inner surface of the bottle, for example,
Sprayed on the bottom, bottom corners, sidewalls, shoulders, etc.
The liquid reservoir stabilizes the distribution and supply of ozone water to each orifice even when the rotary nozzle body is rotating.

In the sterilizing spray nozzle of the present invention, among the above-mentioned many orifices, the orifices directed in the horizontal direction or the oblique direction are attached so that the nozzle body is rotated when ozone water is ejected. Orient (match) the direction. As a result, even when the amount of ozone water sprayed is relatively small, the reaction force at the time of spraying ozone water is effectively transmitted to the rotating nozzle body, and the effective rotation of the rotating nozzle body and the internal surface of the bottle due to this effective rotation. It becomes possible to apply ozone water uniformly and uniformly.

[0021]

[Examples] A, BB and C of "Fig. 3" showing a plane structure taken along line AA of "Fig. 2" and "Fig. 2" showing a side sectional structure of a spray nozzle for sterilizing ozone water of the present invention. In B and C of "FIG. 3" showing the planar cross-sectional structure at -C, the nozzle 1 is roughly composed of the liquid supply pipe 2, the rotary nozzle body 3, and the rotary nozzle body with respect to the liquid supply pipe 2. Three
Is composed of a bearing 4 for rotatably and liquid-tightly connecting. The liquid supply pipe 2 is formed in a hollow shape and has a channel 5 extending in the axial direction therein. A taper portion 6 for connection is provided at the lower end of the liquid supply pipe 2, and a step portion 7 for bearing engagement is provided at the upper end thereof.

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

The rotary nozzle body 3 is provided with a large number of orifices communicating from the inner surface to the outer surface. That is, in this specific example, an upwardly facing orifice 15 is provided substantially at the center of the upper wall 8, a horizontal orifice 16 is provided at the side wall portion 9, an obliquely downward facing orifice 17 is provided at the lower portion 10 and an obliquely upward portion is provided at the corner portion 12. Oriented orifices 18 are provided respectively. The upward orifice 15 has an orifice shape in which the large-diameter orifice 19 and the small-diameter orifice 20 are provided adjacent to each other so that the large-diameter orifice 19 and the small-diameter orifice 20 have a dulled cross section. Touches the circumference around the axis.

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

Generally, the number of each of these orifices 16, 17 and 18 is preferably about 2 to 8.
Further, each of the orifices 16, 17 and 18 has a diameter (R0) of the inner peripheral surface of the rotary nozzle body 3 when projected onto a horizontal plane.
Preferably, it extends tangentially to a circle having a diameter (R1) approximately equal to or smaller than. It is generally preferred that the ratio R1 / R0 be in the range 0.7 to 1. As a matter of course, the outer diameter of the rotary nozzle body 3 must be one that 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, 18 is V (cm / sec) as the average flow rate of ozone water, and the total cross-sectional area of the orifice of the rotary nozzle is A ( cm ^ 2), set so that "Equation 1", "Equation 2" and "Equation 3" are satisfied. The cross-sectional area (A1) of the upward facing orifice 15 and the ratio (A1 / A) to the total cross-sectional area of the orifice are generally preferably in the range of 0.08 to 0.25.

FIG. 4 and FIG. 5 are schematic layout diagrams for explaining the ozone water sterilization 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 portion 22, a bottom corner portion 23, a side wall portion 24, a shoulder portion 25 and a neck portion 26, and the neck portion 26 is provided with a support ring 27 for gripping the bottle. The bottle 21 is supplied to the rotary type sterilizer 28 in an inverted state, and is supported by the support base 36.
The support ring 27 by means of the gripping tool 29 attached to the
Is gripped, swirls in the device 28, and is discharged to the outside of the device after the sterilization process.

Paired with the gripper 29, coaxially with it,
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, the support base 36 is provided with a rail 40 extending in a vertical direction, and a liquid supply pipe support plate 42 is provided on the rail 40 via a linear motion type 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 having a drive shaft 30 for vertically moving the liquid supply pipe support plate 42 along the rail 40. The nozzle elevating and lowering drive mechanism 43 and the like are driven so that the nozzle 1 is inserted into the bottle 21, the necessary up-and-down scanning operation is performed, and then the bottle 1 is pulled out. The mouth portion 35 of the bottle 21 is open,
Draining is done easily. In the drawings, a single gripper and nozzle pair is shown for simplification, but in an actual device, a large number of pairs should be arranged circumferentially around the rotary drive shaft. Should be understood.

When the bottle 21 is loaded into the device 28,
The air cylinder 43 is driven to connect the nozzle 1 to the bottle 21.
Insert inside (at the start of spraying "Fig. 5"). Then, 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, ozone water is sprayed from the orifices of the nozzle 1 onto the inner surface of the bottle 1, and the rotary nozzle body 3 of the nozzle 1 is rotated by its 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. On the other hand, the spray from the diagonally upward orifice 18 is applied to the container bottom corner portion 23, respectively. The upward orifice 15 includes a large-diameter orifice 19 and a small-diameter orifice 20.
Since and are provided adjacent to each other, the direction of the spray is slightly changed, and the nozzle body is also rotated, so that the container bottom 24 is sprayed evenly. The other part of the container is sprayed uniformly by the rotation of the rotary nozzle body 3. In addition to the rotation of the rotary nozzle body 3, the vertical scanning movement of the nozzle 1 is combined, whereby uniform and uniform sterilization of the entire inner surface of the bottle 21 can be performed with a small amount of ozone water in a relatively short time. 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 from the mouth 35 to the outside of the bottle. One of the advantages is that it does not require any extra time. After spraying a predetermined amount of ozone water, the on-off valve is closed, the air cylinder 43 is driven, and the nozzle 1 is discharged to the outside of the bottle 21 (at the end of sterilization in "FIG. 4"). If desired, aseptic air can be blown into the bottle 21 by an air nozzle (not shown) to drain water. The bottle 21 which has been sterilized is sent from the device 28 to an aseptic 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 highest concentration of ozone water is 2
It had a concentration of ~ 3ppm, but recently 20 ~ 30p
It became possible to produce ozone water having a high concentration of pm. For example, the high-concentration ozone water used in the present invention is disclosed in JP-A No. 2-11.
It can be obtained by using the ozone water producing apparatus described in Japanese Patent No. 9991.

Examples of the bottle include various bottles made of metal, glass, plastic, and the like. INDUSTRIAL APPLICABILITY The present invention is particularly effective for the sterilization of plastic bottles that are easily thermally deformed by heat sterilization. Suitable examples of such plastics include polyethylene, polypropylene,
Olefin-based resins such as ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic ester copolymer, ionomer, ethylene vinyl alcohol copolymer: polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate / isophthalate copolymer Polymers such as polyester: nylon 6, nylon 6,6, nylon 11, nylon 12 and other polyamides: polyvinyl chloride: polyvinylidene chloride and the like. This 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 of the present invention, the inner surface of the container has a sterilization value of 2D to 8D, particularly 3D to 6D.
It is useful for sterilizing to D. 3D (d
“Ecimal” means that the sterilization number is 10 ³ pieces / bottle. The required sterilization time varies depending on the inner volume of the bottle, the flow rate of ozone water, and the required sterilization value. Generally, sterilization can be completed in the order of 5 to 30 seconds. The effects of the present invention will be described in the following examples.

[0035]

EXAMPLE 1 The rotating nozzle of the present invention has an outer diameter of 28 m as shown in FIG.
It has a cylindrical shape of aluminum alloy with a height of 25 mm and a height of 25 mm.
The orifice is provided with φ2.7 mm at the center of rotation on the upper surface of the nozzle and φ2 mm adjacent to it, and one φ2 mm at the outside of the orifice.
4 2 mm, 4 φ2 mm facing right on the side of the nozzle
Φ2m on the lower surface of the nozzle, which is diagonally downward 45 °
Four 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 of a square PET bottle having an internal capacity of 2 liters was carried out. The nozzle was inserted 190 mm into the bottle as shown in FIG. 2, and then ozone water having a concentration of 20 ppm was sprayed. 17 seconds after the start of spraying, lower the nozzle toward the bottle mouth (lowering speed: 50 mm
/ Sec), spraying was stopped 20 seconds after the start of spraying.
The flow rate of ozone water at this time is 1250 ml / 5 seconds,
The average flow rate was 500 cm / sec. Although not shown in the figure, immediately after that, aseptic air was blown into the bottle to expel water droplets and ozone gas of residual ozone water, and then sterile water was injected into this bottle to wash out the number of surviving bacteria and culture. The number of surviving bacteria was calculated to determine the bactericidal value (D value). The results are shown in Table 1. In addition, sterilized ozone water discharged from the bottle being sprayed was collected and the concentration of the ozone water was measured. The results are also shown in Table 1.

Example 2 The flow rate of ozone water was 2160 ml / 5 seconds (average flow rate: 86).
Spray sterilization was performed in the same manner as in Example 1 except that the value was set to 0 cm / sec), and the same evaluation was performed. The results are shown in Table 1.

Example 3 The flow rate of ozone water was 700 ml / 5 seconds (average flow rate: 280).
(cm / sec), except that spray sterilization was performed in the same manner as in Example 1 and the same evaluation was performed. The results are shown in Table 1.

Example 4 Using the nozzle of Example 1, 13 nozzles having φ2 orifice diameters were all made φ1. The total cross-sectional area of the orifice at this time was 0.159 cm ² . With this nozzle, the flow rate of ozone water is 700 ml / 5 seconds (average flow rate: 8
(80 cm / sec), except that spray sterilization was performed in the same manner as in Example 1 and the same evaluation was performed. The results are shown in Table 1.

Comparative Example 1 A non-rotating nozzle having one orifice of φ1.5 mm in the center of the upper surface of the nozzle and two orifices of φ3 mm inclined by 5 ° on both sides thereof, and the total sectional area of which is 0.161 cm ^2. Was used to spray ozone water with a flow rate of 1250 ml / 5 seconds (average flow rate; 1550 cm / second) from the position 20 mm below the mouth of the bottle for 20 seconds. Evaluation was performed in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2 The nozzle used in Comparative Example 1 was used in the bottle as in Example 1.
90mm insert and flow rate 1250ml / 5sec (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. The results are shown in Table 1.

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

[0042]

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

[Brief description of drawings]

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

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

FIG. 3 (A) is a plan view showing a plane structure taken along line AA of the spray nozzle for sterilizing ozone water of the present invention, (B).
Is a sectional view showing a plane sectional structure taken along line BB of the spray nozzle for sterilizing ozone water of the present invention, and (C) is a sectional view showing a sectional plane structure taken along line C-C of the spray nozzle for sterilizing ozone water of the present invention. 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 main body, 4 is a bearing, 5 is a flow path, 6 is a tapered portion, 7 is a step for locking the bearing, 8 is a nozzle upper wall, and 9 is a nozzle side wall. Part, 1
Reference numeral 0 is a lower portion of the nozzle, 12 is a nozzle corner portion, 13 is a liquid reservoir portion, 14 is a bearing retaining recess, 15 is an upward facing orifice, 16 is a horizontal orifice, 17 is an oblique downward facing orifice, and 18 is an obliquely upward opening. Facing orifice, 19 large orifice, 20 small orifice, 21 bottle, 22 bottle bottom, 23 bottle bottom corner, 24 bottle side wall, 25 bottle shoulder, 26 bottle neck, 26 bottle neck, 27 Is a support ring, 28 is a rotary sterilizer, 29 is a gripping tool, 30 is a nozzle elevating and lowering drive shaft, 35 is a bottle mouth part, 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 liquid supply pipe support plate, and 43 is an air cylinder for moving the nozzle.

Claims (5)

[Claims] 1. A self-rotating nozzle having a large number of orifices provided so as to be directed to respective parts on the inner surface of the bottle is inserted into the bottle, and ozone water is supplied to the rotating nozzle.
When spraying ozone water on the inner surface of the bottle under rotation, the average flow velocity of ozone water is V (cm / sec), and the total cross-sectional area of the orifices of the rotating nozzle is A (cm ² ), the following formula is obtained. A method for sterilizing a container for aseptic filling with ozone water, which comprises spraying so as to satisfy 140 ≦ A × V ≦ 600 (2) A ≦ 0.85 and (3) V ≦ 1000. 2. The method according to claim 1, wherein the ozone water is water containing 10 ppm or more of ozone. 3. The method according to claim 1, wherein the sterilization treatment by spraying is completed within 30 seconds. 4. The method of claim 1, wherein the rotary nozzle is scanned up and down in the bottle to spray ozone water into the bottle. 5. A sterilizing spray nozzle which is inserted into a bottle and used for spraying ozone water on the inner surface of the bottle, wherein a liquid supply pipe having a flow passage therein and a bearing at the tip of the liquid supply pipe are interposed. And a rotatable nozzle body that is rotatably provided and that has a liquid reservoir portion that connects to the liquid supply pipe flow path inside,
The rotary nozzle body is composed of a large number of orifices which are provided so as to communicate with the outer surface from the liquid reservoir and are directed to each part of the inner surface of the bottle when inserted into the bottle. Alternatively, the obliquely oriented orifices are oriented so that the nozzle body is rotated when ozone water is ejected, and the total cross-sectional area of each orifice is the average flow rate of ozone water. When V (cm / sec) and the total cross-sectional area of the orifice of the rotary nozzle are A (cm ² ), the formula “Equation 1” 140 ≦ A × V ≦ 600 “Equation 2” A ≦ 0.85 and “Equation 3” A spray nozzle for sterilizing ozone water, which is set so as to satisfy V ≦ 1000.