JPH0682024B2 - Cooling system for ice and snow exhibition hall - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system for an ice and snow exhibition space, and more particularly to a cooling system for a low temperature space of an ice and snow exhibition space that forms a cold-condensed exhibit.

2. Description of the Related Art A snow and ice exhibition space has been proposed in which low-temperature condensation exhibits such as ice or snow sculptures are provided indoors during and before the summer season. In the example of the ice and snow exhibition site shown in the side view of FIG. 2 and the vertical cross-sectional view of FIG. 3, an artificial landscape is formed by the exhibit body 2 such as a snow image or an ice image by low temperature condensation in the low temperature space 1.
A viewing path 5 surrounded by a heat insulating waist wall 3 and a transparent cross section 4 is provided in the low temperature space 1. If necessary, an illuminator 7 is provided to illuminate the exhibit 2 appropriately. The viewer 6 views the artificial landscape through the transparent heat insulating unit 4 while moving on the floor surface F in the viewing path 5 in the front-rear direction indicated by the arrow P and other arbitrary directions. The inside of the viewing path 5 is kept at room temperature by, for example, warm air blown from the air supply pipe 16 in the pit 15 as shown by an arrow H.

The low temperature space 1 includes a heat insulating top wall 11, a heat insulating side wall 12, and a heat insulating floor 13.
It is surrounded by an insulating wall consisting of and is thermally shielded from the external space. Therefore, the melting of the low temperature condensation display 2 in the low temperature space 1 due to the conduction heat and the convection heat from the outside can be suppressed to an extremely small amount.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Although it has a function of forming the exhibit 2 by low-temperature condensation and a function of maintaining the low-temperature condensed state, a system that efficiently achieves both of these functions in the ice and snow exhibition hall has not been developed yet. A low-temperature condensation exhibit of snow statues and ice statues over a landscape of several tens of meters at the Ice and Snow Exhibition Center 2
When forming by the above method, if only the blowing of cold air is used, uniform cooling is not performed, and therefore good results cannot be obtained.

In high latitude areas, if you use a device that appropriately introduces winter outdoor air indoors to freeze snow images, ice images, etc., and maintain the frozen state in other seasons The low-temperature condensation display 2 can be formed economically. For example, Table 1 shows the daily changes in the average outside air temperature (° C) in February in Asahikawa City, Hokkaido. (Source: Kashima Construction Co., Ltd. in-house document "User Guide for ADEW / Dew Prevention Performance Evaluation Program.") As is clear from the above table, in Asahikawa city, the probability that the outside temperature during February is 0 ° C or less throughout the day is extremely high. It is possible to form a cold set exhibit 2 such as an image. However, in reality, it is necessary to perform low-temperature condensation molding of the display body by the outside air in winter and cool it in other seasons to maintain the shape of the display body. No system has yet been provided for freezing artificial landscapes and cooling the space in other seasons.

Means for Solving the Problems A cooling system for an ice and snow exhibition space according to the present invention will be described with reference to the embodiment shown in FIG. A ceiling inner wall 11a is provided with a gap from the heat insulating top wall 11 of the low temperature space 1 to form the ceiling chamber 20 by the above gap, and a heat insulating side wall of the low temperature space 1
An inner wall 21 is provided from 12 with a small gap (air supply passage 22 in FIG. 1). An upper end of the small gap between the heat insulating side wall 12 and the inner wall 21 communicates with the ceiling chamber 20, and an air supply port 23 communicating with the low temperature space 1 is formed in a lower end portion of the inner wall 21. The cold space 1 is cooled by sending cold air from above into the ceiling chamber 20 and the small gap, that is, the air supply passage 22.

In high latitudes, outdoor air in winter is preferably used as the cold air.

More preferably, the heat insulating top wall 11 of the low temperature space 1 is provided with an exhaust port 30a, the ceiling inner wall 11a is provided with an exhaust port 24, and the air in the low temperature space 1 is moved upward through the exhaust port 24 and the exhaust port 30a. To the outside.

Action In the embodiment shown in FIG. 1, the cool air introduced into the ceiling chamber 20 descends in the air supply passage 22 between the heat insulating side wall 12 and the inner wall 21 and reaches the air outlet 23 near the floor of the low temperature space 1. Enters the low temperature space 1. Preferably, the air in the low temperature space 1 is exhausted to the outside through the exhaust port 24 formed in the ceiling inner wall 11a and the exhaust port 30a provided in the heat insulating top wall 11, thereby ventilating the low temperature space 1 or its ventilation. Be able to circulate the internal air.
This flow of cold air completely cools the ceiling inner wall 11a and the inner wall 21 from both the front and back surfaces and keeps them at a low temperature to ensure the uniformity of internal cooling of the low temperature space 1.

Compared to a low temperature space having a conventional structure in which cool air is blown out from a specific outlet, in the low temperature space according to the present invention, the ceiling inner wall 11a and the inner wall 21 of the ceiling surface and the side walls are strongly cooled entirely from the front and back surfaces, so a cooling effect. Especially, the uniformity of temperature is improved. Therefore, the low-temperature condensed display body 2 such as a snow image or an ice image can be efficiently formed over a wide area. For example, an indoor landscape over a length of several tens of meters can be easily formed by the low-temperature condensation display 2 such as the snow image or ice image.

Furthermore, the ceiling inner wall 11a and the inner wall 21 have a remarkable effect in preventing the display body 2 from melting. When the display body 2 is formed on the indoor side surface of the heat insulating top wall 11 or the heat insulating side wall 12, those heat insulating walls
The heat from the outside of the high-temperature chambers 11 and 12 is transmitted to the display body 2 in a small amount and continuously, causing melting and deformation of the display body 2.
However, in the structure of the present invention, the exhibit 2 is formed on the inner surface of the ceiling inner wall 11a and the inner wall 21 of FIG. The ceiling inner wall 11a and the inner wall 21 are cooled from both the front and back surfaces, and are kept at substantially the same temperature as the front and back of the display body 2.
The heat conduction from 11a and the inner wall 21 does not cause melting of the display body 2.

If the outside air in the high latitude region in winter is used as the cold air, a landscape consisting of snow images, ice images, etc. can be formed indoors at low cost. However, the cold air used in the system of the present invention is not limited to natural outside air, and may be air artificially cooled by the output of a refrigerator or the like.

In a season when the outdoor air temperature rises other than winter, an appropriate cooler 25, for example, a cooling device in which a refrigerant circulates in the flow path of the air descending from the ceiling chamber 20 into the air supply passage 22 to the air supply port 23, is cooled. If a coil or the like is provided, melting of a snow image or an ice image can be prevented with a relatively small amount of energy. The installation of a suitable cooler 25 in the air flow path belongs to the prior art.

Embodiment In the embodiment shown in FIG. 1, an outside air fan 29 is provided in an outside air duct 28 connected to an outside air intake 27 formed in the heat insulating top wall 11 of the low temperature space 1, and outside air is taken into the ceiling chamber 20 as necessary. Put in. The taken-in outside air is sucked in by the fan 26 as shown by the arrow D, proceeds through the air supply passage 22 as shown by the arrow C, and is sent to the low temperature space 1 through the air supply port 23. In order to prevent the display body 2 such as a snow image or an ice image from melting when the temperature of the outside air is high, a cooler 25 is installed in the flow path of the outside air and is operated as necessary.

Further, the heat insulating top wall 11 is provided with an exhaust port 30a, the exhaust duct 30 is connected to this exhaust port 30a, and the exhaust fan 31 is connected to the exhaust duct 30.
To be installed. When the exhaust fan 31 is operated, the air in the low temperature space 1 can be taken out to the outside through the exhaust port 24 of the ceiling inner wall 11a and the exhaust port 30a of the heat insulating top wall 11 as shown by an arrow E. A suitable guide plate 32 may be provided to prevent the outside air from the outside air intake 17 and the air from the exhaust port 24 from mixing in the ceiling chamber.

Effects of the Invention As described in detail above, the cooling system for the ice and snow exhibition space according to the present invention is provided with an inner wall with a gap from the heat insulating wall of the low temperature space, and the low temperature space at the lower end of the inner wall near the floor of the low temperature space. A cold air is introduced into the gap from a cold air intake formed in the top wall of the heat insulating wall, and the cool air in the gap is blown out from the air vent to the low temperature space. Since the configuration is used, the following remarkable effects are obtained.

(B) It is possible to efficiently form a low temperature artificial landscape in a relatively large indoor space of 10 meters or more with a snow image or an ice image.

(B) An artificial landscape consisting of low-temperature condensed exhibits can be efficiently formed indoors by using the outside freezing air in the winter in high latitude areas.

(C) It is possible to efficiently prevent the melting of the low-temperature condensation exhibit indoors even in the season when the outside air temperature is high.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, FIG. 2 is a schematic end view of an ice and snow exhibition hall, and FIG. 3 is a vertical sectional view taken along line III-III in FIG. 1 ... Low temperature space, 2 ... Exhibit body, 3 ... Heat insulation waist wall, 4 ... Transparent heat insulation part, 5 ... Viewing path, 6 ... Viewer, 7 ... Lighting fixture, 11 ... Heat insulation top wall, 11a ... Ceiling inner wall, 12 ... Insulated top wall, 13… Insulated floor, 15
… Pit, 16… Air supply pipe, 20… Ceiling chamber, 21… Inner wall, 22… Air supply passage, 23… Air supply port, 24… Exhaust port, 25… Cooler, 26… Fan, 27… Outside air intake, 28 … Outside air duct, 29
… Outside air intake fan, 30… Exhaust duct, 31… Exhaust fan,
32 ... Information board.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shun Takazawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) Reference JP-A-2-25670 (JP, A) JP Flat 1-285762 (JP, A)

Claims (3)

[Claims] 1. A cooling system for a low temperature space surrounded by a heat insulating wall of an ice and snow exhibition site, wherein an inner wall is provided with a gap from the heat insulating wall of the low temperature space, and the low temperature is provided at a lower end portion of the inner wall near a floor of the low temperature space. The air supply port communicating with the space is opened, the cool air is introduced into the gap from the cool air intake formed in the top wall of the heat insulating wall, and the cool air in the gap is blown from the air supply port to the low temperature space. Cooling system for the ice and snow exhibition hall. 2. A cooling system for an ice and snow exhibition site according to claim 1, wherein the cold air is used as outdoor air in winter. 3. The system according to claim 1, wherein a discharge port is provided in a top wall portion of the heat insulating wall of the low temperature space,
A cooling system for a snow and ice exhibition space, wherein an exhaust port is provided on the inner wall portion of the ceiling of the inner wall, and the air in the low temperature space is exhausted from above through the exhaust port and the exhaust port to the outside.