JPS6219668A - Cooling piping structure of refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cooling piping structure for a refrigeration system suitable for cooling a large area to be cooled, such as an ice rink.

[Technical background of the invention and its problems]

When constructing an ice rink artificially, a number of cooling pipes are laid in the floor of the rink, and the ends of these cooling pipes are connected to headers installed on both sides or one side of the rink, and these headers are used for further cooling. Usually, the refrigerant sent from the refrigerator is circulated through the ladder, the cooling pipe, the header, and the refrigerator in this order, and the water in the link is frozen by the endothermic action of the refrigerant.

As the refrigerant, there are cases where a secondary refrigerant such as brine is used, and there are cases where a primary refrigerant such as chlorofluorocarbon or ammonia is used, and in both cases, the refrigerant performs the freezing action by the endothermic action of the refrigerant.

When using brine, the brine itself is first cooled by a refrigerator, and the water inside the link is frozen by this cooling brine. When using freon, the gaseous refrigerant is compressed by a compressor and then condensed and liquefied by a condenser. Later, the water in the rink is evaporated by an evaporator to freeze it, and the former is called an indirect cooling method, and the latter is called a direct expansion cooling method.

However, regardless of the cooling method, the refrigerant is circulated, and in particular, in ice rinks, the water in the rink is circulated through multiple cooling pipes that are piped to a large area to be cooled, and the water in the rink is frozen. Moreover, in order to maintain the frozen state, it is necessary to constantly operate a refrigerator or the like to circulate the refrigerant, which requires a large amount of running cost.

[Purpose of the invention]

This invention was made with attention to the above-mentioned circumstances, and its purpose is to circulate the refrigerant after freezing the water by the freezing action, even in a large area to be cooled like an ice rink. To provide an economical cooling piping structure for a refrigeration system that can maintain a frozen state for a long time even when the refrigeration system is stopped, and can significantly reduce running costs due to refrigerant circulation during operation of a refrigeration machine, etc. There is a particular thing.

[Summary of the invention]

In order to achieve the above object, the present invention arranges a large number of cooling pipes through which a refrigerant flows substantially in parallel, and also arranges a cold storage device containing a cold storage agent therein substantially parallel to these cooling pipes. The structure is such that it can be maintained in a frozen state for a certain period of time by utilizing the latent heat of solidification of the cold storage agent.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows, for example, an ice skating rink. The floor of the link 1 serving as the area to be cooled has a large number of cooling pipes 3 along its longitudinal direction, and a plurality of cooling pipes 3, which will be described later.
For example, tubular cold storage devices 4 are arranged substantially in parallel. The cooling pipes 3 are arranged at predetermined intervals, preferably at equal intervals, in the width direction of the link 1.

Further, an outgoing main header 5.5 and a returning main header 6.6 are arranged on the outside of the fence 1a at both ends in the longitudinal direction of the link 1, and this outgoing main header 5.5 has a plurality of subheaders. 7... is connected to one end of the cooling pipe, and the other end is connected to the return main header 6.6. And each cooling pipe 3...
Both ends of the link 1 pass through a through hole 8°8 drilled in the fence 1a of the link 1. Further, the outgoing main headers 5, 5 are connected to the refrigerator 10 via an outgoing pipe 9.9, and the return main header 6.6 is connected to the refrigerator 10 via an incoming pipe 11.
Connected to 0. This refrigerator IO is constituted by, for example, a compressor, a condenser, etc., and condenses and liquefies a fluorocarbon liquid as a refrigerant, or cools brine, and sends the liquefied brine or liquefied refrigerant to the cooling pipes 3... This constitutes a refrigeration cycle that removes heat from the water in link 1 and freezes it.

Furthermore, the cold storage devices 4 are pipes molded from metal or synthetic resin materials, and a cold storage agent to be described later is housed inside, and both ends of the cold storage devices 4 are sealed. . In other words, the cold storage agent uses, for example, a potassium chloride aqueous solution, a calcium chloride aqueous solution, or a sodium chloride aqueous solution. None 1.

In the case of an ice rink, the cold storage agent is particularly preferably an aqueous potassium chloride solution. The preferred temperature for ice intended for ice rinks is around -10°C, and the eutectic point of this aqueous solution is around -10°C. Calcium chloride aqueous solution has a eutectic point of around 155°C, sodium chloride aqueous solution has a eutectic point of -21,
At around 2 degrees Celsius, it is unsuitable for ice rinks. Here, the freezing point of potassium chloride aqueous solution is shown in the following table.

The latent heat of coagulation (melting) of an aqueous potassium chloride solution is 7.96 Kcal per (100+24.6) g in the case of category a in the table above.

Further, the cooling pipes 3... and the cold storage devices 4... are held on the floor portion 2 of the link 1 by a holder 12 shown in FIG. That is, the holder 12 is disposed in the width direction of the link, that is, in the direction perpendicular to the cooling pipes 3 and the cold insulators 4, and the support part 13 has a cooling hole cut out in a substantially U-shape. Pipe support part 14... and cold storage device support part 15...
are arranged alternately at equal intervals. A midway portion of the cooling tube 3 is fitted into and supported by the cooling pipe support portion 14, and a midway portion of the cold storage device 4 is fitted into and supported by the cold storage device support portion 15. Therefore, the cooling pipe 3... and the cold storage device 4
... are arranged in parallel so that the latent heat effect of the cold storage agent in the cold storage device 4 is uniformly applied. However, the arrangement structure of the cooling pipes 3... and the cold storage devices 4... is not limited to the above embodiment, and may be configured as shown in FIGS. 3(A) to 3(F). That is, in (A), one cold storage device 4 is piped in parallel for each of a plurality of cooling pipes 3 (for example, three). In (B), one cold storage device 4 is piped in parallel above the two cooling pipes 3, 3. (C),
(D) is a unit in which one cold storage device 4 is connected between two cooling pipes 3. 4... can be installed at the same time, improving piping work efficiency.

In (E) and (F), the cooling pipe 3.3 and the cold storage device 4 are integrally provided with the holder 16 to form a unit, and the piping workability can be improved as in the previous embodiment.

Therefore, according to the cooling piping structure of the refrigeration system configured as described above, the refrigerant discharged from the refrigerator 10 is sent to the outgoing main header 5.5 via the outgoing pipe 9, and It is supplied from the header 5.5 to one end of the cooling pipe 3... via a plurality of subheaders 7..., and flows through the cooling pipe 3... to the return main header 6.6 at the other end. the refrigerator 1 through the return pipe 11
It gets sucked into 0. In that case, if the ends of the adjacent cooling pipes 3 on the same side are connected alternately to the forward main header 5 and the return main header 6, the refrigerant flowing through the cooling pipes 3 adjacent to each other within the link 1 will be The direction of flow is reversed, so that the cooling pipes 3 can be passed from one end to the other end by passing each other. By circulating the refrigerant in the cooling pipes 3 in this way, the water spread on the floor of the link 1 freezes, and at the same time the cold storage devices 4 disposed parallel to the cooling pipes 3...・The cold storage agent inside will solidify.

In this way, after the water in link 1 freezes, the freezing temperature can be maintained for a certain period of time due to the latent heat of the cold storage agent, and even if the refrigerator IO is stopped and the refrigerant circulation is stopped, the freezing state will not occur. can be maintained.

If melting begins from the surface of the ice layer after a certain period of time,
By operating the refrigerator 10 again to circulate the refrigerant,
Freezing can be achieved, and the frozen state can be maintained for a certain period of time due to the cold storage effect without having to constantly operate the refrigerator 10. In other words.

The operation stop time of the refrigerator 10 can be extended.

Running costs can be reduced.

In the above embodiment, the cooling piping structure for an ice rink has been described, but it can also be used for cold storage in large freezers, refrigerators, air conditioners, water tanks for maintaining cold water, and the like. Also,
In the above embodiments, the cold storage device is formed into a tubular shape, but it may also be formed into a sheet shape, for example.

When the cold storage device that houses the cold storage agent is formed into a tubular shape, since it is a pipe with both ends sealed, flat, vertical, or curved piping is possible, and there is no restriction on piping, and the cooling pipe and cold storage device can be formed into a tubular shape. It is easy to create a unit by providing these in one piece.

〔Effect of the invention〕

As explained above, according to the present invention, since the cooling device containing the cold storage agent is arranged almost parallel to the cooling pipe that circulates the refrigerant to the area to be cooled, the latent heat of solidification of the cold storage agent The freezing temperature can be maintained for a certain period of time,
For example, it is possible to maintain a frozen state even in a large area to be cooled, such as an ice rink, and there is no need to constantly operate a refrigerator, etc., which can significantly reduce running costs. This has the effect of improving the durability of the machine, etc.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an ice rink showing an embodiment of the present invention, Fig. 2 is a sectional view showing the relationship between cooling pipes and cold storage devices, and Figs. 3 (A) to (F) are cooling pipes and cold storage devices. 61 is a cross-sectional view showing different embodiments of the relationship between the tools. Link (cooled area) 3. Cooling pipe 4. Cooling device FIG. 1

Claims (4)

[Claims] (1) In the area to be cooled, a large number of cooling pipes through which refrigerant flows are arranged almost parallel to each other, and an appropriate number of cold storage devices containing a cold storage agent are arranged almost parallel to these cooling pipes. A cooling piping structure for a refrigeration system characterized by: (2) A cooling piping structure for a refrigeration system according to claim 1, characterized in that a cold insulator is disposed for every other cooling pipe or for every plurality of cooling pipes. (3) Claim 1, characterized in that the cold storage device is filled with an aqueous potassium chloride solution as a cold storage agent.
Cooling piping structure of the refrigeration equipment described in section. (4) A cooling piping structure for a refrigeration apparatus according to claim 1, wherein the cold storage device is formed in a tubular shape.