JPH04236084A - Frozen material maintaining device - Google Patents

Abstract

PURPOSE:To miniaturize the constitution of cold heat source and contrive the reduction of the cost of the device by a method wherein cold heat is accumulated employing excessive cold heat generated by utilizing an excessive capacity generated in a refrigerating means. CONSTITUTION:A valve mechanism 17 is provided to change and regulate the distribution of the circulating and supplying amount of low-temperature refrigerant, generated by a refrigerating means 4, to a refrigerant pipeline 3 on a floor 2 and an ice making machine 13. In daytime, wherein cooling loads for an ice layer 6 and an artificial snow layer 7 are heavy, most of the generated low-temperature refrigerant is circulated and supplied to the refrigerant pipeline 3 by the regulation of the valve mechanism 17. On the contrary, in nighttime, wherein the cooling loads are light, the supply of the refrigerant into the refrigerant pipeline 3 is choked and excessive low-temperature refrigerant, generated by the choking, is circulated and supplied to the ice making machine 13. The supplementation of ice to an ice heat accumulating tank 14 or ice making operation for the accumulation of the cold heat is effected utilizing the excessive capacity of the refrigerating means 4 in such a manner.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a frozen matter cooling means for cooling frozen matter by the cold heat generated by the freezing means to prevent the frozen matter from melting, and an atmosphere-adjusting air supply to the surroundings of the frozen matter. The present invention relates to a frozen matter maintenance device including an air cooling means for cooling frozen matter.

0002

[Prior Art] Conventionally, in the above-mentioned frozen matter maintaining device, the freezing means for cooling frozen matter generates cold heat to be applied to the frozen matter cooling means, and has a cold heat generating capacity that can handle the maximum value of the frozen matter cooling load. At the same time, it is equipped with a refrigeration means for cooling frozen matter, which generates cold heat to be applied to the air cooling means (air cooling reduces the load on the refrigeration means for cooling frozen matter, which has low freezing efficiency due to low temperature operation The system is equipped with a refrigeration means that has a cold heat generating capacity capable of handling the maximum air cooling load, and has a cold source system for the frozen matter cooling means and a cold heat source system for the air cooling means. They were made independent from each other in terms of device configuration.

[0003] To explain further by giving a specific example, FIG.
The conventional device configuration of an artificial snow maintenance device in the field is shown. As a frozen matter cooling means, a refrigerant pipe 3 cools the ice layer 6 and the artificial snow layer 7 (corresponding to the frozen matter to be prevented from melting) on the floor 2 with a low-temperature refrigerant. is installed on the floor 2, and a cooling coil 11 as an air cooling means is installed in the air conditioner 8 that air-conditions the room, and the maximum value of the cooling load of the ice layer and artificial snow layer changes with environmental changes. A low-temperature refrigerator 4 for cooling the ice layer/artificial snow layer that circulates and supplies low-temperature refrigerant to the refrigerant piping 3 of the floor 2 and has a cold heat generation capacity that can handle the maximum air cooling load. A refrigerator 4a for air cooling and a refrigerator 4a for circulating and supplying refrigerant to the cooling coil 11 of the air conditioner 8 were separately provided.

0004

[Problems to be Solved by the Invention] However, in the conventional device configuration, as described above, it is necessary to equip the refrigeration means 4 for cooling frozen matter, which has a cold heat generation capacity capable of handling the maximum value of the frozen matter cooling load. In addition, in order to be equipped with a refrigeration means 4a for air cooling that has a cold heat generating capacity capable of handling the maximum value of the air cooling load, additional equipment for each of the refrigeration means 4, 4a is also installed on each refrigeration unit. Means 4
, 4a, each having a capacity corresponding to the capacity of the two, has the problem of increasing the cost of the equipment and increasing the space for installing the equipment.

An object of the present invention is to solve the above-mentioned problems by rationally improving the configuration of the cold heat source.

[0006]

[Means for Solving the Problems] A first feature of the frozen matter maintaining device according to the present invention is a frozen matter cooling means which cools the frozen matter by the cold heat generated by the freezing means and prevents the frozen matter from melting; and a heat storage means for storing excess cold heat generated by the refrigeration means when a cooling load on the frozen matter is small, and a heat storage means for storing the cold heat generated by the freezing means when the cooling load on the frozen matter is small; The apparatus is equipped with a cold heat conveying means for supplying the cold heat stored by the means to the air cooling means as a cold heat source for air cooling, and its functions and effects are as follows.

[0007]

[Function] In other words, since the frozen matter cooling load changes with environmental changes (see Fig. 1), the freezing means 4 that provides frozen matter cooling heat to the frozen matter cooling means 3 has a frozen matter cooling load. Surplus capacity occurs when is small. Therefore, the surplus cold heat generated by using this surplus capacity is stored in the heat storage means 1.
By supplying the stored cold heat of the heat storage means 14 to the air cooling means 11 by the cold heat transport means 15a and 15b, the air cooling means 11 is caused to perform an air cooling function using the supplied heat stored cold heat.

[0008]

As a result of the above operations, according to the first characteristic configuration of the present invention, the cold heat source system for the frozen matter cooling means and the cold heat source system for the air cooling means are made independent of each other in the device configuration, thereby preventing freezing. It was equipped with separate refrigeration means for cooling frozen objects that had the ability to generate cold heat that could handle the maximum value of the material cooling load, and refrigeration means for air cooling that had the ability to generate cold heat that could handle the maximum value of the air cooling load. Compared to conventional equipment, the cooling/heat source configuration of the entire equipment and its ancillary components can be made smaller in terms of capacity and equipment space by the amount of surplus generated cold heat, thereby reducing equipment costs and It has now been possible to effectively save space.

[0009] Furthermore, the above-mentioned refrigeration means for applying cold heat to the frozen matter cooling means has the following features for the purpose of preventing frozen matter from melting:
According to the first characteristic configuration of the present invention, which has a function of generating cold heat at an extremely low temperature level, the excess cold heat generated at this low temperature level is used for air cooling by the air cooling means. When cooling and dehumidifying the air to be cooled, that is, when dehumidifying the atmosphere-adjusted air supplied around frozen objects for the purpose of adjusting the atmosphere, air cooling has a high cooling and dehumidifying function by supplying cold heat at a low temperature level. This also has the advantage of effectively reducing the humidity around frozen objects as part of atmosphere adjustment.

A second feature of the frozen matter maintaining device according to the present invention is that the air cooling means is configured to perform a cooling and dehumidifying function on the air to be cooled, and the air cooling means cools and dehumidifies the air to be cooled. It is equipped with an adsorption type dehumidifying means to dehumidify the air.

In other words, even if the air cooling and dehumidifying function of the air cooling means is improved by supplying cold heat at a low temperature level as described above, there is a problem in that the condensed water generated due to cooling and dehumidification freezes. There is a limit to the improvement of the cooling and dehumidifying function due to lowering the temperature, but if the second characteristic configuration described above is adopted, cooling and dehumidifying by the air cooling means can be stopped to the extent that condensed water does not freeze. In addition, by dehumidifying the air that has been cooled and dehumidified by the air cooling means using an adsorption type dehumidifying means that does not have the problem of freezing, it is possible to achieve a higher degree of humidity reduction around frozen objects as one of the atmosphere adjustments.

0012

[Example] Next, an example will be explained.

FIG. 1 shows the equipment configuration of an indoor artificial ski resort, where 1 is a building, 2 is a floor with a sloped part for forming a ski slope, 3 is a refrigerant pipe arranged over almost the entire surface of the floor 2,
4 is a low temperature refrigerant (e.g. -14°C to -22°C brine)
The low-temperature refrigerators 5a and 5b are refrigerant circulation paths that connect the refrigerant pipe 3 and the low-temperature refrigerator 4, and by circulating the low-temperature refrigerant generated by the low-temperature refrigerator 4 to the refrigerant pipe 3 of the floor 2, The ice layer 6 on the floor 2 and the artificial snow layer 7 formed on the surface of the ice layer 6 are cooled to prevent the ice layer 6 and the artificial snow layer 7 from melting.

Reference numeral 8 denotes a cooling coil 11 that cools and dehumidifies the combined air of the outside air taken in from the outside air passage 9 and the return air from indoors led through the return air passage 10, and converts the cooled and dehumidified air into the supply air. This is an air conditioner that supplies indoors via a passageway 12. By cooling the indoor atmosphere and reducing humidity by this air conditioner 8, the moisture replenished by the intake of outside air and the breathing of indoor players is transferred onto the artificial snow layer 7. It prevents frost formation to maintain good snow quality in the artificial snow layer 7, and also helps prevent the artificial snow layer 7 and the ice layer 6 from melting.

On the other hand, as a cold heat source configuration for the cooling coil 11, an ice heat storage tank 14 is provided to store a large amount of ice cubes a produced by the ice making machine 13 together with cold water w.
This ice heat storage tank 14 and cooling coil 11 are connected to a cold water circulation path 15.
a, 15b, and the low-temperature cold water w cooled by the stored ice a in the ice heat storage tank 14 is passed through the cold water circulation path 15a,
By circulating and supplying the air to the cooling coil 11 through the cooling coil 15b, the cooling coil 11 is made to function as a cooling and dehumidifying function.

Regarding the ice-making operation of the ice-making machine 13, an air-conditioning refrigerant circulation path 1 connecting the ice-making machine 13 and the low-temperature refrigerator 4 is used.
6a, 16b are provided in parallel to the refrigerant circulation paths 5a, 5b that connect the refrigerant pipe 3 of the floor 2 and the low temperature refrigerator 4, and the low temperature refrigerator The ice making machine 13 is made to function as ice making by the low temperature refrigerant that is circulated and supplied from the ice making machine 13.

Furthermore, the amount of low-temperature refrigerant generated by the low-temperature refrigerator 4 that is circulated and supplied to the refrigerant pipe 3 of the floor 2 and the amount of low-temperature refrigerant generated by the ice maker 1
A valve mechanism 17 is provided to change and adjust the ratio of the circulating supply amount to All or most of the low-temperature refrigerant generated in step 4 is circulated and supplied to the refrigerant pipe 3 in the floor 2, so that the cooling capacity for the ice layer 6 and the artificial snow layer 7 is large enough to match the load, and on the other hand, At night, when the cooling load on the ice layer 6 and the artificial snow layer 7 is considerably smaller than during the day, the valve mechanism 17
By adjusting this, the refrigerant circulating supply amount to the refrigerant pipe 3 of the floor 2 is reduced to a small amount, and the surplus low-temperature refrigerant generated by this throttling is circulated and supplied to the ice maker 13. An ice-making operation for replenishing ice a to the ice heat storage layer 14 (ie, cold heat storage) is performed using the surplus capacity of the ice storage layer 14.

Reference numeral 18 is a three-way valve that adjusts the amount of circulating cold water supplied to the cooling coil 11, and reference numeral 19 is a three-way valve that adjusts the circulating supply amount of cold water to the cooling coil 11, and 19 is a three-way valve that adjusts the dew point temperature of the indoor air to the artificial snow layer 7 based on the detection information of the sensor 20 that detects indoor temperature and humidity. surface temperature (usually -1℃~-5℃
) is a humidity adjustment controller that adjusts the cooling and dehumidifying ability of the cooling coil 11 by adjusting the three-way valve 18 so that the dew point temperature of the indoor air is approximately equal to the surface temperature of the artificial snow layer 7. By making them equal, moisture in the indoor air is prevented from forming on the artificial snow layer 7 as described above, and
Conversely, the moisture in the artificial snow layer 7 is also prevented from escaping into the indoor air, thereby preventing deterioration in snow quality due to this moisture escaping.

The above-mentioned air supply air passage 12 that guides the temperature and humidity adjusted air from the air conditioner 8 indoors is branched into two air passages 12a and 12b, and one of the branch air supply air passages 12b has a
An adsorption type dehumidifier 21 is interposed to further dehumidify the air cooled and dehumidified by the cooling coil 11 of the air conditioner 4.

That is, for the purpose of preventing the melting of the ice layer 6 and the artificial snow layer 7, the ice a is produced by utilizing the night surplus capacity of the cryogenic refrigerator 4, which generates an extremely low temperature refrigerant. By making the cooling coil 11 have a cooling and dehumidifying function using the water as a cold heat source, the cooling coil 11 can be used as a cold water source for general air conditioning (+5℃~+7℃).
Although the cooling and dehumidifying ability of the cooling coil 11 is improved compared to the case where the cooling coil 11 is supplied with a temperature of For this reason, there is a limit to the improvement in cooling and dehumidifying ability by lowering the temperature of the refrigerant supplied to the cooling coil 11, and for this reason, the amount of time required to make the dew point temperature of the indoor air almost equal to the surface temperature of the artificial snow layer 7 is limited. In order to ensure sufficient dehumidification/dehumidification capacity, an adsorption type dehumidification device 21 as described above is additionally provided.

In the figure, reference numeral 22 is a supply air path for supplying high-temperature regenerated air to the adsorption type dehumidifier 21, and reference numeral 23 is an exhaust path for exhausting indoor air in an amount corresponding to the amount of outside air taken in.

Further, 24 is a three-way valve control mechanism that bypasses the low-temperature refrigerant from the low-temperature refrigerator 4 through the bypass path 16c after ice replenishment to the ice heat storage tank 14 is completed.

Next, another example will be listed.

The application of the present invention is not limited to artificial ski resorts, but can be applied to various fields that handle various frozen substances such as ice, dry ice, snow, and frost.

The structure of the frozen matter cooling means 3 is not limited to the refrigerant piping structure, and various structures can be adopted depending on the form of the target frozen matter 6, 7.

The heat storage means 14 for storing excess cold heat generated by the freezing means 4 is not limited to an ice heat storage tank, but may also be a latent heat storage tank in which a pack containing a latent heat storage material is installed in a cold water storage area, or a latent heat storage tank that stores antifreeze liquid. Various types of heat storage can be applied, such as a heat storage tank that stores heat as material.

Adsorption type dehumidifying means 21 shown in the above embodiment
may be omitted.

Furthermore, the air cooling means 11 for cooling the atmosphere adjusting air supplied around the frozen objects 6 and 7 may be configured to simply cool the air in the sensible heat region depending on the purpose of adjusting the atmosphere.

The cold heat conveying means 15a, 15b for supplying the stored cold heat by the heat storage means 14 to the air cooling means 11 may supply the stored cold heat to the air cooling means 11 using a refrigerant other than water.

[0030] The period during which the excess cold heat generated by the freezing means 4 is stored is not limited to nighttime, and any period may be selected as long as the cold heat generation capacity of the freezing means 4 is surplus.

Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

[Figure 1] Equipment configuration diagram of an artificial ski resort showing an example

[Figure 2
] Equipment configuration diagram of an artificial ski resort showing a conventional example

[Explanation of symbols]

3 Frozen matter cooling means 4
Refrigeration means 6, 7
Freeze 11
Air cooling means 14
Heat storage means 15a, 15b Cold heat transport means

Claims (2)

[Claims] Claim 1: The frozen matter (6), (7) is cooled by the cold heat generated by the freezing means (4), and the frozen matter (6),
(7) frozen matter cooling means (3) for preventing melting;
A frozen object maintenance device comprising an air cooling means (11) for cooling atmosphere-adjusted air supplied around the frozen objects (6), (7), the cooling load being applied to the frozen objects (6), (7). a heat storage means (14) for storing surplus generated cold heat of the freezing means (4) when Cooling/heat conveying means (15a
), (15b). 2. Adsorption type dehumidification, wherein the air cooling means (11) is configured to perform a cooling and dehumidifying function on the air to be cooled, and the air cooled and dehumidified by the air cooling means (11) is dehumidified. 2. The ice maintenance device according to claim 1, further comprising means (21).