Information
-
Patent Grant
-
6334327
-
Patent Number
6,334,327
-
Date Filed
Thursday, November 30, 200023 years ago
-
Date Issued
Tuesday, January 1, 200222 years ago
-
Inventors
-
Original Assignees
-
Examiners
Agents
- Armstrong, Westerman, Hattori, McLeland & Naughton, LLP.
-
CPC
-
US Classifications
Field of Search
US
- 062 320
- 241 194
- 241 DIG 17
-
International Classifications
-
Abstract
Artificial snow making equipment includes an air-blowing pulverizer which prevents fluctuation in the size of ice pieces by eliminating fluctuation in the amount of ice blocks being supplied also eliminates blocking by the ice blocks, as a result utilizing air effectively such that the ice pieces are blown out as artificial snow the requisite distance. The artificial snow making equipment with constant forced blowing includes ice block supplier 1 to supply ice blocks at a constant rate and air-blowing pulverizer 11. The ice block supplier 1 has ice block supply opening 4 through which ice blocks 2 are supplied, casing 3 which has ice block supply opening 4; rotary blades 8 which supply ice blocks 2 at a constant rate while rotating in casing 3; and exit for ice blocks 5 which is positioned under casing 3. The air-blowing pulverizer 11 has air duct 9 which receives air 12 as well as ice blocks 2 that are supplied from an ice block supplier 1; casing 13 which has opening 10 of air duct 9 on the side surface; rotary blades 17 which pulverize ice blocks 2 into ice pieces 18 and which is placed in casing 13; and air exhaust 19 which is formed on the side of casing 13 opposite from opening 10 of the air duct to blow ice pieces 18 as artificial snow 20. An exit for ice blocks 5 of an ice block supplier 1 to supply ice blocks at a constant rate is connected to ice block receiving slot 14 of air-blowing pulverizer 11 via air duct 9.
Description
FIELD OF THE INVENTION
The present invention relates to an artificial snow making equipment for an artificial ski slope wherein a block of ice is pulverized and blown away.
RELATED ART
A conventional air-blowing pulverizer such as an ice crusher generates artificial snow
49
by pulverizing ice block
48
into sleet-like small pieces as shown in
FIGS. 11 and 12
. The equipment in
FIG. 11
has rotary blades
45
for pulverizing which are arranged at an equal distance from each other in the radial direction around the rotational shaft in casing
44
on the top of rigid substrate
47
. Air supply opening
41
, through which air to glow artificial snow
49
is supplied, and ice supply opening
42
, through which ice blocks are supplied, are placed at one end of substrate
47
under the lower end of casing
44
. The other end of substrate
47
under casing
44
, opposite from supply opening
42
, has exhaust opening
43
through which artificial snow
49
made of pulverized ice is blown. Ice blocks
48
are supplied, together with air through air supply opening
41
on the substrate at the right side in the figure and are pulverized into sleet-like pieces by crushing them against substrate
47
with the rotational force of rotary blades
45
, which are arranged around rotational shaft
46
and rotate at
Another example of a conventional air-blowing pulverizer is shown in FIG.
12
. Herein, the positions of supply opening
42
for ice blocks and air supply opening
41
are different from ones in
FIG. 11
wherein they are arranged at separate positions on casing
44
. Supply opening
42
for ice blocks
48
is placed at the top of casing
44
. Supplied ice blocks, while passing through casing
44
by rotary blades
45
for pulverizing which are rotated by rotational shaft
46
at a high speed, are crushed with rotary blades
45
and reach the air supply opening at the bottom of casing
44
. The crushed ice is further pulverized between substrate
47
and rotary blades
45
to be artificial snow
49
which is blown with air through exhaust opening
43
at the other end of the bottom of casing
44
.
However, the above air-blowing pulverizer has drawbacks. With the pulverizer of
FIG. 11
, the size of ice pieces pulverized by rotary blades
45
may vary depending on the amount of ice blocks
48
supplied to casing
44
through supply opening. Also, once the supply of ice blocks
48
becomes excessive, the path between air supply opening
41
and exhaust opening
43
may become blocked with snow. Therefore, excess drive is required to rotate rotary blades
45
at a high speed. With the pulverized of
FIG. 12
, in addition to the drawbacks discussed about the pulverizer in
FIG. 11
, when one intensifies the air flow through air supply opening
41
to blow the pulverized ice pieces further, not all the air reaches exhaust opening
43
, but some air flows backward and tends to leak from supply opening
42
. As a result, the air flow to blow artificial snow
49
from exhaust opening
43
is weakened such that artificial snow
49
cannot be blown far enough. Consequently, further drive is required.
Hence, the present invention intends to provide an efficient air-blowing pulverizer in which:
variance in the size of pulverized ice pieces is eliminated by stabilizing the amount of ice blocks to be supplied such that the resulting artificial snow is more desirable for skiing;
operation of the pulverizer is smoothly continued by preventing ice blocks from blocking inside the casing; and
all supplied air can be utilized to blow the pulverized ice pieces far enough without requiring excess drive.
DESCRIPTION OF THE INVENTION
To serve the above purpose, the present invention provides, according to the first invention, an artificial snow making equipment with constant forced-blowing, comprising:
an ice block supplier
1
to supply ice blocks at a constant rate including:
a casing
3
having, on a upper side of the casing, an ice block supply opening
4
through which ice blocks
2
are supplied, and on a lower side of the casing, an exit for ice blocks
5
which is positioned under the casing
3
;
a rotary blades
8
which are arranged at an equal distance from each other around a rotational shaft
6
, formed at the center of the casing
3
, to supply the ice blocks
2
at a constant rate; and
an air-blowing pulverizer
11
including:
an air duct
9
which receives the ice blocks
2
and air
12
being supplied from an ice block supplier
1
;
a casing
13
having an opening
10
of the air duct
9
on the side surface;
rotary blades
17
radially arranged at an equal distance from each other around periphery
16
of rotational shaft
15
, formed at the center of the casing
13
, to pulverize ice blocks
2
into ice pieces
18
; and
an air exhaust
19
formed on the opposite side of the casing
13
from the opening
10
of the air duct to blow ice pieces
18
as artificial snow
20
,
wherein the exit for ice blocks
5
of the ice block supplier
1
is connected to an ice block receiving slot
14
of air-blowing pulverizer
11
by the air duct
9
.
According to the second invention in reference to artificial snow making equipment with constant forced-blowing of the first invention, the ice block supplier
1
is such that space
22
between the periphery of casing
3
and edge
21
of rotary blade
8
is formed to be very narrow to prevent a back flow of air
12
from exit for ice blocks
5
into the ice block supplier
1
.
According to the third invention in reference to artificial snow making equipment with constant forced-blowing of the first or second invention, the rotary blades
17
of the air-blowing pulverizer
11
have width
24
equal to the length
23
of rotational shaft
15
, and the rotary blades
17
are radially arranged at an equal distance from each other around the periphery
16
of the rotational shaft such that rotary blades
17
are parallel to axis
39
.
According to the fourth invention in reference to artificial snow making equipment with constant forced-blowing of the first or second invention, the rotary blades
17
in the air-blowing pulverizer
11
are radially arranged in two rows at an equal distance from each other around the periphery
16
of the rotational shaft, wherein one side of the rotary blades
17
, at the central periphery
26
of the shaft, is positioned behind the other side of the rotary blade
17
, on an edge
25
of the shaft, in the direction opposite from direction of rotation
27
such that rotary blade
17
is oblique to axis
39
.
According to the fifth invention in reference to artificial snow making equipment with constant forced-blowing of the second or fourth invention, edge portion
31
is a portion of rotary blade
17
in air-blowing pulverizer
11
between edge
29
of the blade and bending line
30
which is located between base
28
and edge
29
of the blade wherein edge portion
31
is bent in the direction opposite from direction or rotation
27
.
In other words, the means of the present invention has an ice block supplier
1
to supply ice blocks as a raw material at a constant rate to air-blowing pulverizer
11
. In this an ice block supplier
1
, a plurality of rotary blades
8
are arranged at an equal distance from each other around rotational shaft
6
which rotates inside casing
3
. Exit for ice blocks
5
of an ice block supplier
1
to supply ice blocks at a constant rate is placed facing air duct
9
through which air is forced to air-blowing pulverizer
11
such that ice blocks can be supplied to air-blowing pulverizer
11
at a constant rate by adjusting the speed of rotation of rotary blades
8
in relation to the volume of the space between rotary blades
8
. Additionally, space
22
between the [inner] periphery of casing
3
and edge
21
of rotary blade
8
is established to be a minimum yet does not cause any disturbance in the rotation of rotary blades
8
. This configuration prevents the force of air to air-blowing pulverizer
11
from declining, which is caused by a backflow of air to be supplied to air-blowing pulverizer
11
into ice block supplier
8
to supply ice blocks at a constant rate via exit for ice blocks
5
of an ice block supplier
1
as an opening to supply ice blocks to air-blowing pulverizer
11
.
In air-blowing pulverizer
11
, a plurality of rotary blades
17
are arranged in the radial direction around rotational shaft
15
which rotates in cylindrical casing
13
at a high speed. Air duct
9
is placed facing the side of casing
13
to form ice block receiving slot
14
which receives ice blocks
2
to be pulverized, as well as forced air. The side of casing
13
opposite from ice block receiving slot
14
is air exhaust
19
through which artificial snow made of pulverized ice pieces
18
is blown out.
In the case of air-blowing pulverizer
11
where rotary blades
17
are alternated in two rows around rotational shaft
15
, blade
32
is positioned between one edge
25
of rotational shaft
15
and central periphery
26
of the shaft while blade
33
is positioned between central periphery
26
and the other edge
25
. This plurality of blades is alternated in two rows on periphery
16
of the rotational shaft. As a result, ice blocks
2
to be pulverized move between rotary blades
17
from left to right and vice versa as they are transferred to air exhaust
19
such that ice pieces
18
will not block the space between rotary blades
17
. This configuration does not require extra drive [as a counter force against the blocked path]. Further, ice blocks
2
are pulverized by rotary blades
17
while moving between rotary blades
17
, resulting in more uniformed small ice pieces
18
as artificial snow
20
, more appropriate for skiing. Moreover, the side of rotary blades
17
in two rows at central periphery
26
of the shaft is positioned to form an angle alpha in relation to rotational shaft
15
in the direction opposite from the direction of rotation. Consequently, ice blocks
2
can more easily move between two rows of rotary blades
17
such that the pulverizing performance is improved. Additionally, a backflow of the air in casing
13
, which would cause a decline in the air pressure, is prevented such that artificial snow
20
can be blow further away.
BRIEF DESCRIPTIONS OF DRAWINGS
FIG. 1
is a schematic configuration showing artificial snow making equipment with constant forced blowing of the present invention.
FIG. 2
is an oblique view of one row of rotary blades in an air-blowing pulverizer according to the present invention.
FIG. 3
is an oblique view of two rows of rotary blades in an embodiment of the present invention.
FIG. 4
is a plan view of the rotary blades in FIG.
3
.
FIG. 5
is an profile view of FIG.
3
.
FIG. 6
is an expanded plan view of a rotational shaft and rotary blades.
FIG. 7
is an oblique view of another embodiment of
FIG. 2
wherein the edge portion of the rotary blades are bent.
FIG. 8
is an oblique view of another embodiment of
FIG. 3
wherein the edge portion of the rotary blades are bent.
FIG. 9
is a plan view of the rotary blades in FIG.
7
.
FIG. 10
is an profile view of the rotary blades in FIG.
7
.
FIG. 11
is a side view of a schematic configuration of conventional air-blowing artificial snow making equipment.
FIG. 12
is a side view of a schematic configuration of another conventional air-blowing artificial snow making equipment.
In these figures, following symbols are used:
1
: ice block supplier to supply ice blocks at a constant rate;
2
: ice blocks;
3
: casing;
4
: ice block supply opening;
5
: exit for ice blocks;
6
: rotational shaft;
7
: periphery of rotational shaft;
8
: rotary blades;
9
: air duct;
10
: opening of air duct;
11
: air-blowing pulverizer;
12
: air;
13
: casing;
14
: ice block receiving slot;
15
: rotational shaft;
16
: periphery of rotational shaft;
17
: rotary blades;
18
: ice pieces;
19
: air exhaust;
20
: artificial snow;
21
: edge;
22
: space;
23
: length of shaft;
24
: width;
25
: edge of shaft;
26
: central periphery of shaft;
27
: direction of rotation;
28
: base of rotary blade;
29
: edge of rotary blade;
30
: bending line;
31
: edge portion of rotary blade
32
-
38
: blade;
39
: axis;
40
: shifting direction;
41
: air supply opening
42
: ice supply opening;
43
: exhaust opening;
44
: casing;
45
: rotary blades
46
: rotational shaft;
47
: substrate;
48
: ice blocks;
49
: artificial snow
50
: angle alpha;
51
: angle beta;
EMBODIMENTS
The following describes embodiments of the present invention in reference to the drawings.
FIG. 1
is a schematic configuration of the present invention showing artificial snow making equipment with constant forced blowing wherein the front wall is removed to show the inside configuration. Number
1
is an ice block supplier to supply ice blocks at a constant rate, placed on the upstream side of air-blowing pulverizer
11
. An ice block supplier
1
to supply ice blocks at a constant rate has funnel-shaped ice block supply opening
4
, which receives ice blocks
2
as a raw material, on the top of steel cylindrical casing
3
. In casing
3
, rotational shaft
6
is positioned at the center and is rotated by a drive (not show in the figure) in the direction indicated by an arrow. With rotary blades
8
comprised of six steel blades, the width of each blade is equal to the width of rotational shaft. Additionally, the blades reach the inner wall of casing
3
and are arranged at an equal distance from each other in the radial direction around periphery
7
of rotational shaft
6
. Exit for ice blocks
5
, having a width equal to the distance between blades, is positioned at the bottom of casing
3
.
Exit for ice blocks
5
of an ice block supplier
1
to supply ice blocks at a constant rate is connected to the side of air duct
9
through which air
12
is sent into air-blowing pulverizer
11
at the bottom of an ice block supplier
1
and functions as ice block receiving slot
14
of air-blowing pulverizer
11
. After obtaining ice blocks
2
through ice block receiving slot
14
, ice blocks are transferred together with air
12
via air duct
9
through opening
10
of air duct, connected to the side of cylindrical steel casing
13
, into air-blowing pulverizer
11
. Rotational shaft
15
is placed at the center of casing
13
and is driven by a drive (not shown in the figure) at a high speed in the direction indicated by the arrow. Rotary blades
17
composed of steel are arranged at an equal distance around periphery
16
of rotational shaft
15
in the radial direction. Air exhaust
19
, through which ice pieces
18
pulverized in casing
13
are blown with forced air as artificial snow, is placed at the side of casing
13
opposite from opening
10
of the air duct.
In an ice block supplier
1
to supply ice blocks at a constant rate, space
22
between edge
21
of rotary blades
8
and the inside wall of casing
13
is established to be a minimum without disturbing the rotation of the blades. As a result, air
12
is prevented from flowing from exit for ice blocks
5
to an ice block supplier
1
via space
22
.
There are various modifications of rotary blades
17
of air-blowing pulverizer
11
. The following describes those modifications in reference to drawings of rotary blades
17
.
FIG. 2
illustrates rotary blades
17
that have width
24
equal to length
23
, between edge
25
and another edge
25
of rotational shaft
15
wherein six rotary blades
17
are arranged at an equal distance from each other around periphery
16
of rotary shaft
15
in parallel to axis
39
. In this case, ice blocks
2
, which are supplied from opening
10
of the air sending duct on the side of casing
13
, are pulverized by being crushed by one of rotary blades
17
in rotation. The ice blocks are further pulverized by friction against each other to become ice pieces
18
. Ice pieces
18
are pushed by rotary blades
17
during the rotation and blown out through air exhaust
19
.
The following describes rotary blades
17
of another embodiment in reference to FIG.
3
. Two rows of rotary blades, which have a width equal to the distance from one edge
25
of the shaft to central periphery
26
of the shaft, are arranged at an equal distance from each other in parallel to axis
39
wherein positions of rotary blades
17
in the left row and the right row are alternated. Herein, rotary blade
17
is not adjacent to the center of another rotary blade
17
on periphery
16
. Therefore, ice blocks
2
, which are inserted from opening
10
of the air duct on the side of casing
13
, are placed in front of rotating rotary blade
17
and crushed therewith. Ice blocks
2
are then pushed by rotary blade
17
to the space on periphery
16
of the shaft in the adjacent row. Accordingly, ice blocks shift between rotary blades
17
in the left and right rows during the rotation such that the ice blocks are further pulverized by the blades. Together with pulverization due to the friction among the ice blocks, ice pieces
18
with uniform small particles result.
FIGS. 3 through 6
show rotary blades
17
of yet another embodiment. Herein, the center sections of rotary blades
17
in two rows are shifted backward in relation to the sides on edges
25
of the shaft in the direction opposite from the direction of rotation
27
with angle alpha in relation to axis
39
of rotational shaft
15
while rotary blades
17
of two rows are arranged parallel to axis
39
in the above embodiment.
FIG. 4
is a plan view of rotary blades
17
in
FIG. 3
while
FIG. 5
is an profile view of rotary blades
17
in
FIG. 3. A
dotted line in
FIG. 4
indicates rotational shaft
15
. In
FIG. 5
, blades
32
,
35
and
36
are positioned on the closer side of rotary shaft
15
as shown in
FIG. 3
wherein the side of the blades at central periphery
26
is shifted backward in relation to the side of edge
25
with angle alpha in relation to axis
39
. Similarly, blades
33
,
34
,
37
and
38
are positioned on the further side of rotary shaft
15
wherein the side of the blades at central periphery
26
is shifted backward in relation to the side of edge
25
with angle alpha in relation to axis
39
. Blades on either side are angled at the center section in the direction opposite from direction of rotation
27
.
FIG. 6
is an expanded plan view of rotational shaft
25
and rotary blades
17
.
When rotary blades
17
of
FIG. 5
rotate in the direction of rotation
27
as in
FIG. 6
, ice blocks
2
shift between the blades in two rows (top and bottom rows in the figure) in shifting direction
40
, as indicated with an arrow. Ice blocks
2
are crushed by the blades every time they are shifted therebetween, resulting in ice pieces
18
which move in the direction of rotation
27
and are blown out from air exhaust
19
. In other words, after being crushed by blade
37
, ice blocks
2
shift along the arrow and are further pulverized by blade
35
. The pulverized ice blocks are shifted to blade
33
, then blade
32
to be further pulverized resulting in ice pieces
18
which moves in shifting direction
27
and are blown out from air exhaust
19
.
Yet another embodiment is shown in
FIGS. 7 through 10
.
FIG. 7
is a modification of rotary blades
17
of FIG.
2
.
FIG. 8
is a modification of rotary blades
17
in two rows of FIG.
3
. In these embodiments, bending line
30
is established from base
28
to edge
29
of rotary blade
17
wherein edge section
31
of rotary blade
17
nearest the edge is bent at bending line
30
with angle beta in direction of rotation
27
.
FIG. 9
is a plan view of the rotary blades of
FIG. 7
while
FIG. 10
is an profile view of FIG.
7
. By bending edge portion
31
of the rotary blades in direction of rotation
27
, ice blocks
2
supplied from opening
10
of the air duct into air-blowing pulverizer
11
are crushed by rotary blades
17
with more force to produce finer ice pieces
18
. As a result, artificial snow
20
, which is more suitable for skiing, can be obtained.
The following further describes the artificial snow making equipment and its operation. Ice blocks to be used with an ice block supplier
1
to supply ice blocks at a constant rate are plate ice prepared with an ice machine in advance and have a size of 7 mm thickness×50 mm×100 mm. The speed of rotation of rotary blades
8
in an ice block supplier
1
is established at 25 rpm such that the ice blocks are supplied to air-blowing pulverizer
11
together with forced air from air duct
9
. The force of the forced air from air duct
9
is established to be strong enough to blow out artificial snow
20
made of ice pieces
18
, which are pulverized with air-blowing pulverizer
11
, through air exhaust
19
at the wind speed of 30 m/sec. In other words, the speed of rotation of rotary blades
17
of air-blowing pulverizer
11
is established to be a high speed of 1500 to 1600 rpm. The performance of air-blowing pulverizer
11
to process artificial snow
20
is 20 m
3
/min. Additionally, rotary blades
17
in two rows between edge
25
of the shaft and central periphery
26
of the shaft are angled in relation to axis
39
by 10 to 15 degree. The diameter of rotary blades
17
of air-blowing pulverizer
11
is 700 mm, and length
23
is 190 mm. In the case of rotary blades
17
which have their edge
31
bent at bending line
30
, the radius between the center of the shaft to bending line
30
of the rotary blades
17
is established to be 250 mm. In addition, the number of rotary blades
17
in each row on the shaft periphery is 6. The size of ice pieces
18
produced by air-blowing pulverizer
11
is sleet-like ice used for snow-cones. Ice pieces
18
are blown out through a hose of about 50 m at air exhaust
19
of air-blowing pulverizer
11
onto a ski slope as artificial snow
20
.
Application in the Field
As described above, the present invention of the artificial snow making equipment with constant forced blowing has an ice block supplier which supplies ice blocks to an air-blowing pulverizer at a constant rate at the upstream of the air-blowing pulverizer. As a result, pulverization by rotary blades of the air-blowing pulverizer is uniformly performed such that the size of pulverized ice pieces is uniform. Additionally, ice blocks are supplied at a constant rate, preventing any blocking of the space between the rotary blades due to excess supply, such that a sudden stop of the air-blowing pulverizer is preventable. Further, any excess drive is not required to rotate the rotary blades against the force. In addition, a decline in the force of air, due to a back flow of forced air into the ice block supplier to supply ice blocks at a constant rate, can be prevented. In the air-blowing pulverizer, an ice block supply opening is placed to connect to an opening of an air duct. Therefore, the air, forced together with ice blocks from the opening of the air duct, is used only for blowing the artificial snow through the air exhaust. Consequently, a loss in air-pressure is minimized such that the artificial snow can be blown to the requisite distance. Additionally, two rows of the rotary blades are alternated around a rotational shaft such that ice blocks are strongly pulverized by a plurality of rotary blades while shifting between the alternated rotary blades, resulting in high pulverization performance. Hence, a large amount of excellent artificial snow with uniform particles can be produced. Further, the rotary blades are angled in relation to the axis of the rotational shaft such that the center side of the rotary blades are shifted backward such that the ice blocks can be shifted among the rotary blades more smoothly. As a result, the ice blocks are efficiently crushed by the rotary blades which increases the pulverization performance. Moreover, since the edge of the blades are bent in the direction of rotation, the blades can pulverize the ice blocks with more force. Therefore, finer and more uniformed ice pieces can be effectively produced. These effects are not obtained by conventional technology.
Claims
- 1. An artificial snow making equipment with constant forced-blowing, comprising:an ice block supplier (1) to supply ice blocks at a constant rate including: a first casing (3) having, on a upper side of the casing, an ice block supply opening (4) through which ice blocks (2) are supplied, and on a lower side of the casing, an exit for ice blocks (5) which is positioned under the first casing (3); a rotary blades (8) which are arranged at an equal distance from each other around a rotational shaft (6), formed at the center of the first casing (3), to supply the ice blocks (2) at a constant rate; and an air-blowing pulverizer (11) including: an air duct (9) which receives air (12) and the ice blocks (2) being supplied from the ice block supplier (1); a second casing (13) having an opening (10) of the air duct (9) on the side surface; rotary blades (17) radially arranged at an equal distance from each other around periphery (16) of rotational shaft (15), formed at the center of the second casing (13), to pulverize ice blocks (2) into ice pieces (18); and an air exhaust (19) formed on the opposite side of the second casing (13) from the opening (10) of the air duct to blow ice pieces (18) as artificial snow (20), wherein the exit for ice blocks (5) of the ice block supplier (1) is connected to an ice block receiving slot (14) of air-blowing pulverizer (11) by the air duct (9).
- 2. The artificial snow making equipment with constant forced-blowing according to claim 1, wherein the ice block supplier (1) is such that space (22) between the inner periphery of casing (3) and edge (21) of rotary blade (8) is formed to be very narrow to prevent a back flow of air (12) from the exit for ice blocks (5) into the ice block supplier (1).
- 3. The artificial snow making equipment with constant forced-blowing according to claim 2, wherein the rotary blades (17) of the air-blowing pulverizer (11) have width (24) equal to the length (23) of rotational shaft (15), and the rotary blades (17) are radially arranged at an equal distance from each other around the periphery (16) of the rotational shaft such that rotary blades (17) are parallel to axis (39).
- 4. The artificial snow making equipment with constant forced-blowing according to claim 2, wherein the rotary blades (17) in the air-blowing pulverizer (11) are radially arranged in two rows at an equal distance from each other around the periphery (16) of the rotational shaft, wherein one side of the rotary blades (17), at the central periphery (26) of the shaft, is positioned behind the other side of the rotary blade (17), on an edge (25) of the shaft, in the direction opposite from direction of rotation (27) such that rotary blade (17) is oblique to axis (39).
- 5. The artificial snow making equipment with constant forced-blowing according to claim 4, in which edge portion (31) is a portion of rotary blade (17) in air-blowing pulverizer (11) between edge (29) of the blade and bending line (30) which is located between base (28) and edge (29) of the blade wherein edge portion (31) is bent in the direction opposite from direction or rotation (27).
- 6. The artificial snow making equipment with constant forced-blowing according to claim 1, wherein the rotary blades (17) of the air-blowing pulverizer (11) have width (24) equal to the length (23) of rotational shaft (15), and the rotary blades (17) are radially arranged at an equal distance from each other around the periphery (16) of the rotational shaft such that rotary blades (17) are parallel to axis (39).
- 7. The artificial snow making equipment with constant forced-blowing according to claim 1, wherein the rotary blades (17) in the air-blowing pulverizer (11) are radially arranged in two rows at an equal distance from each other around the periphery (16) of the rotational shaft, wherein one side of the rotary blades (17), at the central periphery (26) of the shaft, is positioned behind the other side of the rotary blade (17), on an edge (25) of the shaft, in the direction opposite from direction of rotation (27) such that rotary blade (17) is oblique to axis (39).
- 8. The artificial snow making equipment with constant forced-blowing according to claim 3, in which edge portion (31) is a portion of rotary blade (17) in air-blowing pulverizer (11) between edge (29) of the blade and bending line (30) which is located between base (28) and edge (29) of the blade wherein edge portion (31) is bent in the direction opposite from direction or rotation (27).
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP99/06892 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO01/42725 |
6/14/2001 |
WO |
A |
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
P2000-18783 |
Jan 2000 |
JP |