JPH0972641A - Heat exchanger for making ice for ice rink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a heat exchanging efficiency of an ice making heat exchanger by a method wherein secondary refrigerant cooled by primary refrigerant of a freezing cycle is circulated in an ice making panel formed by holding a honeycomb reinforcing material between two flat plates and flowed in a space defined in a honey-comb shape. SOLUTION: In the case that an ice rink is formed, an ice manufacturing panel 16 formed by holding a honey-comb reinforcing member 14 between two flat plates 12, 12a is applied, this panel is applied to an entire forming space of an ice rink to supply water above the ice rink. Then, secondary refrigerant of freezing cycle is circulated in the ice manufacturing panel 16, thereby the secondary refrigerant is passed through communication holes 14a formed in the reinforcing member 14 and then the refrigerant is flowed in a space S defined in a honey-comb structure while a certain resistance is being applied to it. At this time, cold heat of the secondary refrigerant flowing in the space of the reinforcing member 14 is transferred to the flat plates 12, 12a holding the reinforcing member 14 and concurrently the heat is transmitted to water applied on the upper flat plate 12. With such an arrangement as above, water is frozen so as to make an ice rink.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice rink, and more particularly to an ice rink heat exchanger for a multi-purpose stadium.

[0002]

2. Description of the Related Art Conventionally, there has been a demand to utilize indoor stadiums for various sports depending on the intended use, and nowadays, a stadium has been set up so that it can be retracted and stored, and it can now be used as a bicycle racetrack. Exists. Thus, for example, when it is in a state where it can be used as a bicycle racetrack, its inner space can be simultaneously used as a stadium for basketball, volleyball, badminton, tennis and the like. It is also conceivable that the inside space may be used as an ice skating rink by holding an ice rink in addition to these stadiums.

By the way, generally, in order to construct an ice rink, a refrigeration cycle is used to freeze water stored in the rink field. In the refrigeration cycle used in such an ice rink, the primary refrigerant is cooled by this refrigeration cycle, and the secondary refrigerant using an antifreeze liquid is cooled by the primary refrigerant, and the secondary refrigerant is used as a heat exchanger for ice making. It has been introduced to make ice for skating rinks.

[0004]

However, in such a conventional ice rink heat exchanger for ice making, the pipes are arranged in a U-shape and the secondary refrigerant is circulated in the U-shaped pipe. Has become. Therefore, the contact area of the U-shaped pipe with the water that is about to freeze becomes small, and the heat exchange rate between the secondary refrigerant and the water deteriorates. Therefore,
While it takes a significantly long time to create the ice rink, there is a problem that the refrigeration cycle must be increased in size in order to reduce the ice making time of the ice rink.

In view of such conventional problems, the present invention provides an ice rink capable of achieving a miniaturization of the refrigeration cycle by significantly improving the heat exchange rate between the secondary refrigerant and the water to be ice-made. An object is to provide a heat exchanger for ice making.

[0006]

In order to achieve the above object, the ice rink heat exchanger of the present invention cools a primary refrigerant by a refrigerating cycle and a secondary refrigerant using an antifreeze liquid by the primary refrigerant. In a heat exchanger for ice making of an ice rink, in which the secondary refrigerant is cooled to introduce ice in the skating rink, a plurality of reinforcing members formed in a honeycomb shape between two upper and lower flat plates. In addition to sandwiching each of them, each reinforcing material is formed with a communication hole that communicates with the space portion of the reinforcing material adjacent to each other to form one unit of ice making panel, and a space for forming an ice rink while connecting a plurality of ice making panels to each other. The secondary refrigerant is laid all over and is circulated in each ice making panel.

With the above-mentioned structure, the ice rink heat exchanger of the present invention circulates the secondary refrigerant in the ice-making panel constituted by sandwiching the honeycomb-like reinforcing material between two flat plates, thereby The next refrigerant passes through the communication hole formed in the reinforcing material and flows in the space defined by the honeycomb shape. At this time, the cold heat of the secondary refrigerant flowing in the space of the reinforcing material is transferred to the flat plates sandwiching the reinforcing material, and further, the transferred cold heat is transferred to the water stretched on the upper flat plate. It will freeze and form an ice rink.

Therefore, in the heat exchanger for ice making of the present invention, the secondary refrigerant flows in the space defined by the honeycomb structure while receiving the resistance of the reinforcing material, whereby the cold heat of the secondary refrigerant forms the ice rink. Since it exchanges heat with the water that forms, the heat exchange rate is significantly improved.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of the ice rink heat exchanger of the present invention, FIG. 1 is a perspective view showing a main part of the heat exchanger in a broken manner, and FIG. 2 is an inside of the heat exchanger. FIG. 3 is a plan view showing the structure, FIG. 3 is a partial sectional view of an ice rink, and FIG. 4 is a schematic configuration diagram of a refrigeration cycle used in the ice rink.

That is, the ice rink heat exchanger for ice making (hereinafter, simply referred to as a heat exchanger) 10 of this embodiment is shown in FIG.
As shown in FIG. 2, one unit of ice making panel 16 is formed by sandwiching a plurality of honeycomb-shaped reinforcing members 14, 14 ... Between two upper and lower flat plates 12, 12a. Further, each of the reinforcing members 14, 14 ... Is formed with a communicating hole 14a communicating with the space S of the reinforcing members 14, 14 ... Adjacent to each other, and a secondary refrigerant described later is passed through these communicating holes 14a. It has become so. And
As shown in FIG. 3, the ice-making panel 16 as one unit is installed on a heat insulating material 22 laid on a concrete board 20 placed on the ground 18 of the stadium. At this time, the ice-making panel 16, As shown in FIG. 4, a plurality of 16 ... Are spread over the entire formation space of the ice rink 24 without a gap through a coupler (not shown).

The secondary refrigerant supplied from the refrigeration cycle 26 shown in FIG. 4 is introduced into each of the ice making panels 16, 16 ... Installed on the ice rink 24. The refrigeration cycle 26 includes a primary cooling unit 26a and a secondary cooling unit 26b, and the cooling unit 2 according to the embodiment is used.
In 6a, the primary refrigerant compressed by the compressor 28 is cooled and condensed through the condenser 30, and then the dryer 3
2 is expanded and passed through the evaporator 34, and the evaporator 34 heat-exchanges with the secondary refrigerant of the secondary cooling section 26b to cool the secondary refrigerant.

On the other hand, the secondary cooling section 26b pressurizes the secondary refrigerant cooled by the primary cooling section 26a by the circulation pump 36, and supplies it through the supply pipe 38 to the ice making panel 16,
It is designed to be pumped to 16 ... The supply pipe 3
8 is provided with a check valve 40 on the downstream side of the pump 36. Further, the secondary refrigerant passing through the ice making panels 16, 16 ... Is returned to the evaporator 34 via a return pipe 42. The return pipe 42 is provided with a check valve 44 provided with a trap and a filter 46.

By the way, it is desirable that a liquid that does not destroy the ozone layer, such as Freon 135, is used as the primary refrigerant circulating in the primary cooling section 26a, and as the secondary refrigerant circulating in the secondary cooling section 26b. Is antifreeze.

In the heat exchanger 10 of the present invention having the above-mentioned structure, the ice making panel 16 constituted by sandwiching the honeycomb-shaped reinforcing members 14, 14 ... Between the two flat plates 12, 12a.
Are used to lay them all over the formation space of the ice rink 24, and water is sprinkled on the upper side of the ice making panels 16, 16 ... Then, by circulating the secondary refrigerant of the refrigeration cycle 26 through the ice making panels 16, 16 ..., This secondary refrigerant is connected to the communication holes 1 formed in the reinforcing members 14, 14 ...
It flows through 4a while receiving resistance in the space S defined in a honeycomb shape. At this time, the cold heat of the secondary refrigerant flowing in the space of the reinforcing members 14, 14 ...
The ice rink 24 is formed by being transmitted to the flat plates 12 and 12a sandwiching 4 ... And being transmitted to the water stretched on the upper flat plate 12 to freeze it.

Therefore, the heat exchanger 10 for ice making of the present embodiment
The secondary refrigerant flows in the space S of the honeycomb-shaped reinforcing members 14, 14 while receiving the resistance of the reinforcing member, and the cold heat of the secondary refrigerant is heat-exchanged with the water forming the ice rink 24. Therefore, the heat exchange rate can be remarkably improved, and the ice making completion time of the ice rink 24 can be shortened, or the entire refrigeration cycle 26 can be downsized.

Further, since the ice making panels 16, 16 ... Are constituted by sandwiching the reinforcing members 14, 14 ... Between the flat plates 12, 12a as described above, it is possible to achieve a great weight reduction of the ice making panel 16. . Therefore, when the ice rink 24 is removably installed in the indoor stadium for the purpose of multipurpose use of the indoor stadium, the heat exchanger 10 for ice making is used.
The lighter weight makes the installation and removal work significantly easier, and the working time can be greatly shortened. The ice making panels 16, 16 ...
It is desirable to form 2a and the reinforcing members 14, 14 ... With a material having a high thermal conductivity such as aluminum. By forming aluminum in this way, the heat exchange rate can be further increased, and the ice making panel 16, It is possible to achieve further weight reduction of 16 ...

[0017]

As described above, in the ice rink heat exchanger of the present invention, the primary refrigeration cycle is applied to the ice making panel constituted by sandwiching the honeycomb-like reinforcing material between two flat plates. By circulating the secondary refrigerant cooled by the refrigerant, the secondary refrigerant passes through the communication hole formed in the reinforcing material and is configured to flow in the space defined in the honeycomb shape. The refrigerant flows through the honeycomb-shaped reinforcing material while receiving resistance, and the heat exchange rate of the ice-making heat exchanger can be remarkably improved, which in turn reduces the weight of the ice-making heat exchanger and reduces the size of the refrigeration cycle. Can be achieved. Therefore, when the ice rink is removably provided in the indoor stadium, the installation and removal work thereof can be remarkably simplified, and a great reduction in working time can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view in which main parts are broken away showing an embodiment of a heat exchanger for ice making of an ice rink of the present invention.

FIG. 2 is a plan view of an internal structure showing an embodiment of the heat exchanger for ice making of the present invention.

FIG. 3 is a partial cross-sectional view of an attached state showing an embodiment of the heat exchanger for ice making of the present invention.

FIG. 4 is a schematic configuration diagram showing an embodiment of a refrigeration cycle used in an ice rink to which the present invention is applied.

[Explanation of symbols]

10 Ice-making heat exchanger 12, 12a
Flat plate 14 Reinforcement material 16 Ice making panel 24 Ice rink 26 Refrigeration cycle

Claims (1)

[Claims] 1. An ice rink that cools a primary refrigerant by a refrigeration cycle, cools a secondary refrigerant using an antifreeze liquid by the primary refrigerant, and introduces the secondary refrigerant to make ice on a skating rink. In the heat exchanger for ice making, a plurality of honeycomb-shaped reinforcing members are sandwiched between two upper and lower flat plates, and each of the reinforcing members has a communication hole communicating with the space of the adjacent reinforcing member. It is characterized in that it is formed to form one unit of ice making panel, and a plurality of ice making panels are connected to each other and laid in the entire ice rink forming space, and the secondary refrigerant is circulated in each ice making panel. Ice rink heat exchanger for ice making.