JP4379048B2 - Ice making equipment - Google Patents

Description

The present invention relates to an ice making device , and more particularly to an ice making device that makes ice by heat exchange using natural ventilation.

  For example, in a low-temperature storage that uses natural energy to store crops, etc., by taking in the cold heat of the winter season and making ice or making the surrounding ground frozen and using this cold in the summer, Is kept at a low temperature. A ventilator may be provided as a means of introducing outside air into the ice maker of the cold storage in the winter season, but simply trying to take in the natural wind by connecting the ice maker room and the outside will cause the natural wind to have a wind direction. Since it is not constant, it is necessary to rotate the opening so that the external opening matches the wind direction.

Conventionally, as such means, there are provided sensors such as wind vanes that freely rotate the ventilator itself so that the outside air inlet matches the wind direction (Patent Document 1), wind direction detection means, wind speed detection means, There is one provided with means for selectively opening and closing the outside air inlet according to the direction detected by this sensor (Patent Document 2).
Japanese Utility Model Publication No. 6-82249 Japanese Utility Model Laid-Open No. 5-248673

  However, in the technique described in Patent Document 1, since the ventilator itself rotates, the rotating part must be precisely manufactured so that the heavy ventilator rotates smoothly over a long period of time, and the maintenance is also large-scale. Therefore, there is a problem that not only the initial cost but also the running cost increases, and there is a problem that it does not operate when the wind power is small.

  On the other hand, in the technique described in Patent Document 2, an opening / closing mechanism and a motor that is a driving source thereof are necessary, and equipment costs and electric power are required. Therefore, initial costs and running costs are large. It was.

  By the way, when the present inventors investigated the wind pressure coefficient distribution with respect to the cylindrical structure, as shown in FIG. 1, the wind pressure coefficient is about 1 to 0.35 in the range of the wind direction 0 ° to the left and right 30 ° with respect to the structure center. Then, on the surface after that, it was found that the wind direction was about 90 °, the lowest value was −1.25, and the subsequent value was negative. This suggests that when wind pressure is generated on the front side of the structure, negative pressure is generated around the structure from the side surface to the back surface.

This invention is made | formed based on the above knowledge, and aims at cooling the ice maker arrange | positioned in a low-temperature storage efficiently .

In order to achieve the above object, the present invention provides an ice making apparatus in which a ventilation tower is integrally projected on the upper part of a low-temperature storage, and the ventilation tower includes an upper chamber and a lower chamber located below the upper chamber. A plurality of openings that are formed around the ventilation tower, open to a wall surface corresponding to the upper chamber and a wall surface corresponding to the lower chamber, and communicate with the inside and the outside, and a plurality of the openings can be opened and closed. The shutter is provided so as to open only inward in one of the upper chamber and the lower chamber due to a difference in pressure between the inside and outside of the opening, and on the other side in the other of the upper chamber and the lower chamber. A plurality of shutters provided so as to open only toward the outer surface, and the low-temperature storage includes an outer wall and an upper portion communicating with the upper chamber through an inner cylinder penetrating the lower chamber, and a bottom surface Inside the cup-shaped opening And an ice maker disposed inside the inner wall, and guides the outside air taken from a shutter provided in one of the upper chamber and the lower chamber to the inside of the inner wall. The outside air after cooling and being used for cooling is discharged to the outside from a shutter provided in the other of the upper chamber and the lower chamber .

In the present invention, it is preferable that the ventilation tower has an intermediate chamber located between the upper chamber and the lower chamber, the ventilation tower is cylindrical, and the plurality of openings are the ventilation chambers. It is preferably formed at a position divided into a plurality of equal parts in the circumferential direction from the center of the tower.

An ice maker installed in a low-temperature storage only by natural ventilation generated in all directions, which can supply air using natural wind pressure distribution to the ventilation tower and exhaust using negative pressure generated in the surroundings . Can be cooled efficiently .

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 shows an ice making device to which the ventilator according to the first embodiment of the present invention is applied, and FIGS. 3A and 3B show horizontal sections of a ventilation tower constituting the ventilator.

  In the figure, the ice making device is formed by integrally projecting a cylindrical ventilation tower 2 on the upper part of the low-temperature storage 1, and the low-temperature storage 1 is constructed underground, for example, for storing crops and the like. The upper part of 2 is erected on the ground. In the present embodiment, the ventilation tower 2 has a three-layer structure of an upper chamber 3, an intermediate chamber 4, and a lower chamber 5. Of these, the upper chamber 3 is used as an exhaust section and the lower chamber 5 is used as an air supply section. Further, the intermediate chamber 4 constitutes a dead space for partitioning the upper and lower chambers 3 and 5 by preventing the exhaust gas from directly flowing into the supply air.

  The low-temperature storage 1 has a double structure in which the periphery of an ice maker to be described later includes an outer wall 6 and a cup-shaped inner wall 7 having an open bottom surface. Are arranged in multiple stages in the vertical direction. The upper portion of the inner wall 7 communicates with the upper chamber 3 via an inner cylinder 9 that penetrates the lower chamber 5 and the intermediate chamber 4. A gap 10 formed between the upper surface, the side surface, and the lower portion of the outer wall 6 and the inner wall 7 communicates with the lower chamber 5.

  As shown in FIG. 2, the upper chamber 3 and the lower chamber 5 are, for example, radially divided into six from the center of the cylinder, and six openings 11 and 12 are opened at the upper and lower positions of the wall surface in the six divided sections, respectively. Has been. This is because the range of the openings 11 and 12 for dealing with the wind pressure coefficient distribution when the wind direction in the entire circumferential direction of the ventilation tower 2 shown by the imaginary line in FIG. is there. Needless to say, if the upper and lower openings 11 and 12 are formed so as to be shifted by 30 °, the change in the wind direction can be dealt with more finely.

  Each opening 11 of the upper chamber 3 is provided with a shutter 14 that can be opened and closed and that can be opened only outward by a pressure difference between the inside and outside of the opening. On the other hand, each opening 12 of the lower chamber 5 is provided with a shutter 15 that can be opened and closed and that can be opened only inward due to a pressure difference between the inside and outside of the opening. Each of the shutters 14 and 15 is a shield plate with a weight that freely opens and closes by a relatively small difference in pressure between the inside and outside, and a stopper 16 is disposed inside the shutter plate 14 on the upper chamber 3 side. It functions as a one-way valve that closes when it receives and opens when negative pressure is generated outside. On the lower chamber 5 side, a stopper 16 is disposed outside the shutter plate 15 so that it functions as a one-way valve that opens when receiving wind and closes when negative pressure is generated outside.

  In the above configuration, when the ventilation tower 2 receives the wind indicated by the white arrow in FIG. 2, the shutter plate 15 opens as indicated by the arrow at the position facing the wind direction of the lower chamber 5, and the outside air is exhausted through the opening 12. Incorporate. Further, since the negative pressure is generated around the ventilation tower 2 on the side surface or the back surface side with respect to the wind direction, the shutter plate 15 remains closed.

  The outside air taken into the lower chamber 5 passes under the inner wall 7 through the gap 10 between the outer wall 6 and the inner wall 7, enters the inside thereof, and cools the water stored in the ice maker 8. The temperature of the outside air that has cooled the water rises and tends to rise as indicated by the white arrow in the figure.

  On the other hand, in the upper chamber 3, the shutter plate 14 remains closed at the position facing the wind, and negative pressure is generated around the ventilation tower 2 on the side surface or the rear surface side with respect to the wind direction. 14 is opened, and the air in the upper chamber 3 is discharged to the outside through the opening 12.

  Therefore, the external cold air blown into the lower chamber 5 is discharged to the outside via the inner cylinder 9 and the upper chamber 2 through the periphery of the ice maker 8, and the cold air is taken in and discharged. Thus, the ice maker 8 disposed in the low temperature storage 1 is efficiently cooled.

  Even if the wind force is weak, the weight per shutter plate is light compared to the weight of the entire ventilator, so it can be opened and closed by natural winds by adjusting the weight, etc., and added to the shutter plate during strong winds In order to prevent an impact, a buffer material or the like may be interposed in the stopper 16, and in any case, driving equipment using electric power or the like as a driving source is unnecessary, and efficient air supply and exhaust are performed only by natural ventilation. be able to.

  FIG. 4 shows a second embodiment of the present invention. In the present embodiment, contrary to the above-described embodiment, each opening 11 of the upper chamber 3 is provided with a shutter 14 that can be opened only inward. On the other hand, each opening 12 of the lower chamber 5 is provided with a shutter 15 that can be opened only with the opening facing outward. Therefore, in the present embodiment, the outside air taken in from the upper chamber 3 cools the water in the ice maker 8 through the inner cylinder 9, and configures a supply / exhaust path for discharging from the lower portion of the inner wall 7 to the outside through the gap 10. .

  In each embodiment, the present invention is applied to the cooling of an ice maker installed in an ice making chamber by outside air. However, the outside air is taken into the surrounding ground of the low temperature storage to be frozen, or the low temperature storage It can be applied to the case where the outside air is directly taken into the storage itself and cooled, and it can be applied not only to special equipment such as a low temperature storage facility but also to a general building ventilation device.

It is a graph which shows the wind-pressure coefficient distribution with respect to the cylindrical structure used as the foundation of this invention. It is sectional drawing which shows the ice making apparatus to which the ventilation apparatus by 1st embodiment which concerns on this invention is applied. (A), (b) is a plane sectional view in the AA line and BB line of FIG. It is side sectional explanatory drawing which shows the ice making apparatus by 2nd embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Low temperature storage 2 Ventilation tower 3 Upper chamber 5 Lower chamber 6 Outer wall 7 Inner wall 8 Ice maker 9 Inner cylinder 10 Crevice 11,12 Opening 14,15 Shutter plate 16 Stopper

Claims (3)

An ice making device in which a ventilation tower is integrally projected on the upper part of the low-temperature storage,
The ventilation tower is
The upper chamber,
A lower chamber located below the upper chamber;
A plurality of openings that are formed around the ventilation tower, open to a wall surface corresponding to the upper chamber and a wall surface corresponding to the lower chamber, and communicate with the inside and outside;
A plurality of shutters provided so that the openings can be opened and closed, and are provided so as to open only inward in one of the upper chamber and the lower chamber due to a pressure difference between the inside and outside of the opening. A plurality of shutters provided to open only to the outside in the other of the chamber and the lower chamber,
The cold storage is
The outer wall,
An upper wall communicating with the upper chamber through an inner cylinder penetrating the lower chamber, and an inner wall provided in a cup shape with an open bottom;
An ice maker disposed inside the inner wall,
The outside air taken from a shutter provided in one of the upper chamber and the lower chamber is guided to the inside of the inner wall to cool the ice maker, and the outside air after being used for cooling is sent to the upper chamber and the lower chamber. The ice making device is characterized by discharging to the outside from a shutter provided on the other side. The ice making apparatus according to claim 1, wherein the ventilation tower has an intermediate chamber located between the upper chamber and the lower chamber . 3. The ice making device according to claim 1, wherein the ventilation tower has a cylindrical shape, and the plurality of openings are formed at positions divided into a plurality of equal parts in the circumferential direction from the center of the ventilation tower. .

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