JPH0229565A - Ice making plant - Google Patents

Abstract

PURPOSE:To remove ice which is generated on an internal peripheral surface from said surface and hence prevent the drop in ice making efficiency due to the adherence of ice by installing an icing prevent material layer on the internal cylinder surface of an internal cylinder. CONSTITUTION:After a refrigerant is compressed by a compressor 2a, it is condensed by a condenser 2b and expanded by an expansion valve 2c. Then, it is supplied to a ring-shaped passage from a refrigerant inlet 7b of an outer cylinder 7. After the above operation is over, the refrigerant is discharged from a refrigerant outlet 7c and sent again to the compressor 2a. When brine passes through a central passage 6a, an internal cylinder 6 is cooled by the evaporation of the refrigerant in a refrigerating circuit 2. As a result, the water which is in contact with the internal surface 6d of the internal cylinder is frozen into ice. The ice 1 generated herein is immediately removed from the internal peripheral surface 6d by the velocity produced by the action of a circulation pump 10 due to an icing prevention material layer 9 of the internal peripheral surface 6d.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ice making device in an ice storage air conditioning system, and particularly to an improvement of the side wall of an ice making cylinder.

(Prior art) In recent years, thermal storage air conditioning systems have been used in relatively large-scale air conditioning systems in industrial plants, buildings, etc., to reduce power demand during peak cooling load times and increase power demand during off-peak times. I have to.

The heat storage methods of this heat storage air conditioning system include a water heat storage method that uses sensible heat and an ice heat storage method that uses latent heat.
The former water heat storage method has problems such as being unable to produce effective results unless the heat storage tank is enlarged, so demand for the ice heat storage method is increasing.

As shown in Fig. 5, a typical air conditioning system employing this ice heat storage method has a refrigeration circuit (
A cooling pipe (c) for evaporating the refrigerant in b) is introduced and arranged, and the refrigeration circuit (b) is connected to the compressor (d) from the cooling pipe (c).
The cooling pipe (
c) consists of a closed circuit connected to The refrigerant in this refrigeration circuit (b) is compressed by a compressor (d), then condensed by a condenser (e), and then passed through an expansion valve (f) to a cooling pipe (C).
will be supplied to Then, the refrigerant is supplied to the cooling pipe (c
) to evaporate by exchanging heat with the aqueous solution in the storage tank (a), while cooling the aqueous solution and cooling the water in the aqueous solution to below the freezing point on the surface of the cooling pipe (c) to generate ice; The portions are grown sequentially and stored as a heat storage medium in the storage tank (a). On the other hand, the above storage tank (a)
A refrigeration load (h) is connected to the refrigeration load (h) via a cold water pump (g), and the aqueous solution cooled by ice in the storage tank (a) is circulated to the refrigeration load (h) to cool the refrigeration load (h). used for. Further, (i) is an air pump that supplies air to the aqueous solution to cause bubbling, and is used to increase the melting speed of ice.

However, this method has the disadvantage that ice adhering to the cooling pipe (C) becomes a thermal resistance, and as the thickness of the ice increases, the evaporation temperature of the refrigerant decreases, reducing the efficiency of the refrigeration circuit (b). was there. Therefore, as a conventional technique for solving this problem, there is a freezing/cooling system as disclosed in Japanese Patent Application Laid-Open No. 58-2567. The system disclosed in this publication stores water or brine liquid while maintaining a constant liquid level on the inner wall surface of a cylinder equipped with a cooling pipe, and exchanges heat between the cooling pipe and water to cool the inner wall surface of the cylinder. Ice is generated in the cylinder, and the generated ice is peeled off by a screw rotating within the cylinder, so that the ice is separated from the inner wall of the cylinder and is configured so as not to interfere with heat exchange through the cooling pipe. It is.

(Problem to be Solved by the Invention) However, in the system as in the above-mentioned publication, if there is a large amount of ice adhering to the inner wall of the cylinder, rotation of the screw alone will not remove all the ice adhering to the inner wall of the cylinder. It is not possible to remove the ice from the wall, and the ice remaining on the wall becomes a thermal resistance, which not only leads to poor ice generation efficiency, but also requires a new means to rotate the screw. Therefore, the structure becomes complicated and the manufacturing cost increases. Further, since the screw has a drive unit such as a motor for rotating the screw, new problems such as failure of the chain portion occur. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ice making device that has a simple structure and that can reliably remove ice from a cooling tube regardless of the amount of ice produced.

(Means for Solving the Problems) In order to solve the above objects, the present invention takes the following measures.

First, the invention according to claim (1), as shown in FIG. 6a) and an ice-making cylinder (3) having an annular passage (7a) between the inner cylinder (6) and the outer cylinder (7).
, a heat storage tank (5) for storing brine liquid, and an ice making cylinder (3).
), annular passage (7a), compressor (2a), condenser (2b
) and an expansion device (2c) are sequentially connected to enable circulation of refrigerant, and the brine liquid in the heat storage tank (5) is supplied to the ice making cylinder (3) via a pump (10). It is equipped with a brine circuit (4) that circulates under pressure through the central passage (6a), and an anti-icing material layer (9) is provided on the inner circumferential surface (6d) of the inner cylinder (6).

Furthermore, the invention according to claim (2) also includes an ice making cylinder (3) which is also constructed of a double pipe and has a center passage (6a) and an annular passage (7a), and a heat storage tank (5) that stores brine liquid. and,
A refrigeration circuit (2) in which a center passage (6a) of an ice making cylinder (3), a compressor (2a), a condenser (2b), and an expansion device (2c) are sequentially connected to enable circulation of refrigerant; and the heat storage tank. (5
) is provided with a brine circuit (4) that pumps and circulates the brine liquid in the inner cylinder (6) via a pump (10) to the annular passage (7a) of the ice making cylinder (3), and the outer circumferential surface (6e) of the inner cylinder (6). An anti-icing material layer (9) is provided on the surface.

(Actions) The effects of the configurations of the inventions according to each of the above claims are as described below.

In the invention according to claim (1), by providing the anti-icing material layer (9) on the inner circumferential surface (6d) of the inner cylinder (6), that is, on the ice-forming surface, the inner circumferential surface (6d) Immediately upon receiving the water flow from the pump (10), the ice generated is separated from the surface and promptly fed to the heat storage tank (5). Therefore,
The decrease in ice making efficiency due to the adhesion of ice is avoided.

In the invention according to claim (2), in addition to the effect of the invention according to claim (1), the outer circumferential surface (6e) of the inner cylinder (6)
Since the anti-icing material layer (9) is provided on the surface, the coating of the anti-icing material is easy and the structure is easy to manufacture.

(First example) Next, embodiments of the present invention will be described with reference to the drawings.

As shown in Figure 1, this ice making device (1) has a refrigeration circuit (2
) receives cold heat from the brine circuit (4) inside the ice making cylinder (3).
) is frozen, and this ice (1) is transferred to the heat storage tank (5).
) to store heat.

The refrigeration circuit (2) includes a compressor (2a), a condenser (2b),
and an expansion valve (2c), which is connected to an annular passageway (7a) formed between the inner cylinder (6) and the outer cylinder (7) of the ice making cylinder (3), which acts as an evaporator. It is something. On the other hand, the brine circuit (4) is connected to the central passage (6a) in the inner cylinder (6), and is provided with a heat storage tank (5) for storing ice (1) generated in the ice making cylinder (3). It is something.

Next, the ice making cylinder (3), which is the main part of the present invention, will be explained.

As shown in Figures 1 and 2, the ice making cylinder (3) is composed of a double tube consisting of a cylindrical inner cylinder (6) and an outer cylinder (7), and a lid (8) on the front and back. , (8) was closed. The outer cylinder (7) is provided with a refrigerant inlet (7b) and a refrigerant outlet (7c), and the refrigerant circuit (2) is provided with a refrigerant inlet (7b) and a refrigerant outlet (7c).
) is connected to the annular passage (7a). That is, the annular passage (7a) serves as a refrigerant passage. On the other hand, the inner cylinder (
6) is connected to the heat storage tank (5) by communicating with the brine inlet (6b) and brine outlet (6C) provided in the lid (8), (8), and the inner cylinder (6) The center passage (6a) inside serves as a brine liquid passage. still,
The brine circuit (4) is provided with a circulation pump (10), which sequentially pumps the brine liquid in the heat storage tank (5) into the inner cylinder (6).
) into the central passage (6a).

The feature of the present invention is that an anti-icing material is provided so that ice generated on the inner circumferential surface (6d) of the inner cylinder (6) can be easily removed from the inner circumferential surface (6d). is coated to provide an anti-icing material layer (9). The anti-icing material used to form the anti-icing material layer (9) is mainly made of silicone resin or the like.

Next, the ice making operation with the above configuration will be explained.

First, in the refrigeration circuit (2), the refrigerant passes through the compressor (2a
), the refrigerant is compressed in the condenser (2b), and expanded in the expansion valve (2c).
) to the annular passage (7a). After the refrigerant passes through the annular passage (7a), the refrigerant exit (7c)
) and sent to the compressor (2a) again to repeat the above steps. Then, this refrigerant flows through the annular passage (7a)
When passing through, it is evaporated in the passage and cools the inner circumferential surface (6d) of the inner cylinder (6).

On the other hand, in the brine circuit (4), brine liquid is supplied from the heat storage tank (5) by the circulation pump (10) into the center passage (6a) via the brine inlet (6b), After passing, brine exit (6C)
It returns to the heat storage tank (5). When this brine liquid passes through the center passage (6a), the inner cylinder (6) is cooled by the evaporation of the refrigerant in the refrigeration circuit (2) as described above. Face (6d)
The water that comes into contact with it turns into ice. The ice produced here (I
) has an anti-icing material layer (9) on the inner peripheral surface (6d) of the inner cylinder (6).
), the inner peripheral surface (6d) of the inner cylinder (6)
However, due to the flow velocity exerted by the circulation pump, it is immediately detached from the inner circumferential surface (6d) and sequentially discharged from the brine outlet (6C) to the heat storage tank (5). will be sent to The brine liquid cooled by the ice (1) stored in the heat storage tank (5) is
It is appropriately circulated to the refrigeration load (11) connected to the heat storage tank (5) and used to cool the refrigeration load (11).

Note that (11a) is a cold water pump for supplying cold water to the refrigeration load.

As described above, in this embodiment, since the icing prevention material layer (9) is provided on the inner circumferential surface (6d) of the inner cylinder (6), which is the ice-forming surface, ice does not form on the heat exchange portion. Decrease in ice making efficiency due to adhesion is suppressed.

(Second Embodiment) In this example, the refrigeration circuit (2) is connected to the central passage (6a), and the brine circuit (4) is connected to the annular passage (7a). (Description of parts common to the first embodiment will be omitted.) In this configuration, it is the outer peripheral surface (6e) of the inner cylinder (6) that is cooled by the refrigerant passing through the center passage (6a), and In order to make ice in the annular passage (7a), the third
As shown in the figure, an anti-icing material layer (9) is provided on the outer peripheral surface (6e) of the inner cylinder (6). The ice making operation is almost the same as in the first embodiment, and in this case, the ice making operation is performed on the outer circumferential surface of the inner cylinder (6e
) nearby water will turn into ice. Preferably, as shown in FIG. 3, an anti-icing material layer (9) is also applied to the inner circumferential surface (7d) of the outer cylinder (7).

In addition to the effects described in the first embodiment, the configuration of this embodiment allows the anti-icing material to be applied to the outer peripheral surface (6e) of the inner cylinder (6), making the application work easy. , has a structure that is easy to manufacture.

(Third Example) In this example, compared to the first and second examples described above,
In order to further improve the ice-making capacity, the ice-making cylinder is constructed of triple tubes as shown in FIG. 4.

In this case, three passages (center passage (6a), inner annular passage (12a), and outer annular passage (7e)) are formed by triple tubes: inner cylinder (6), intermediate cylinder (12), and outer cylinder (7). A refrigeration circuit (
2) and a brine circuit (4) is connected to the inner annular passage (12a).

In this configuration, the inner annular passage (
The water in 12a) will be frozen. for that,
Anti-icing material layers (9), (9) are provided on the outer peripheral surface (6e) of the inner cylinder (6) and the inner peripheral surface (12b) of the intermediate cylinder (12). The water in the inner annular passage (12a) is cooled and turned into ice by the inner peripheral surface (12b) of the intermediate cylinder (12) and the outer peripheral surface (6e) of the inner cylinder (6). Ice making capacity is improved due to the large heat exchange area.

In each of the above embodiments, the shape of the ice making cylinder is cylindrical, but the present invention is not limited to this, and it is also possible to adopt a cylinder with an irregular shape for the purpose of improving the heat exchange rate. be.

(Effects of the Invention) As described above, according to the present invention, the following effects are achieved.

In the invention according to claim (1), by providing the anti-icing material layer (9) on the inner circumferential surface (6d) of the inner cylinder (6), that is, on the ice-forming surface, the inner circumferential surface (6d) Immediately upon receiving the water flow from the pump (10), the generated ice is separated from the wave surface and promptly fed to the heat storage tank (5). Therefore, it is possible to avoid heat resistance in the part due to the adhesion of ice, and the ice making efficiency is much higher than that of conventional ones.The structure is simple, so the manufacturing cost is low. Furthermore, since it does not have a mechanical drive unit, the occurrence of failures is also suppressed.

In the invention according to claim (2), the above claim (1)
In addition to the effects of the invention related to
) is provided with the anti-icing material layer (9), which makes it easy to apply the anti-icing material and provides a structure that is easy to manufacture.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention;
The figure is a schematic explanatory diagram of the ice-making device, and FIG. 2 is a longitudinal cross-sectional view taken along the line ■-■ in FIG. 1. FIG. 3 is a sectional view of the same portion as FIG. 2 in the second embodiment. FIG. 4 is a sectional view of the same portion as FIG. 2 in the third embodiment. FIG. 5 is a schematic explanatory diagram of a conventional ice making device. ... Condenser, (2c) ... Expansion valve, (3) ... Ice making cylinder, (4) ... Brine circuit, (5) ... Heat storage tank, (6) ... Inner cylinder , (6a)...center passage, (6d
)...Inner peripheral surface, (6e)...Outer peripheral surface, (7)...
Outer cylinder, (7a)...Annular passage, (9)...Icing prevention material, (10)...Circulation pump.

Claims (2)

[Claims] (1) Consists of a double tube consisting of an inner cylinder (6) and an outer cylinder (7),
An ice making cylinder (3) having a central passage (6a) within the inner cylinder (6) and an annular passage (7a) between the inner cylinder (6) and the outer cylinder (7).
), a heat storage tank (5) for storing brine liquid, and an ice making cylinder (
3) annular passage (7a), compressor (2a), condenser (2)
b) and an expansion device (2c) connected in sequence to enable circulation of refrigerant; and a refrigeration circuit (2) in which the brine liquid in the heat storage tank (5) is transferred to the ice making cylinder (3) via a pump (10). Brine circuit (4) that circulates under pressure through the central passage (6a) of
An ice-making device comprising: an anti-icing material layer (9) provided on the inner circumferential surface (6d) of the inner cylinder (6). (2) Consists of a double tube consisting of an inner cylinder (6) and an outer cylinder (7),
An ice making cylinder (3) having a central passage (6a) within the inner cylinder (6) and an annular passage (7a) between the inner cylinder (6) and the outer cylinder (7).
), a heat storage tank (5) for storing brine liquid, and an ice making cylinder (
3) center passage (6a), compressor (2a), condenser (2
b) and an expansion device (2c) connected in sequence to enable circulation of refrigerant; and a refrigeration circuit (2) in which the brine liquid in the heat storage tank (5) is transferred to the ice making cylinder (3) via a pump (10). Brine circuit (4) that circulates under pressure through the annular passage (6a) of
An ice-making device comprising: an anti-icing material layer (9) provided on the outer peripheral surface (6e) of the inner cylinder (6).