JP2630143B2 - Ice making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an ice making apparatus in which a heat exchanger is disposed in a water flow passage through which water or an aqueous solution flows, and which transports iced products in the heat exchanger.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. 63-2171
As disclosed in Japanese Patent No. 71, a water circulation path for circulating water in an ice storage tank is provided, and the outlet side of the water circulation path is directed downward on the upstream side and the outlet end is at a certain height above the water surface of the ice storage tank. An inclined gutter formed so as to open, a heat exchanger is interposed between the gutters, and the water cooled by the heat exchanger in the water circulation path is removed from the supercooled state at the outlet of the gutter to form a slurry. An ice-making apparatus which is designed to stably perform ice making by preventing the water circulation path from freezing due to the progress of ice formation of water by causing the iced material to fall into an ice storage tank while being iced.

Further, as disclosed in Japanese Utility Model Laid-Open Publication No. 1-112345, the outlet end of the water circulation path is opened above the ice storage tank, and an inclined gutter having a baffle plate is provided in front of the opening to form a heat exchanger. By releasing the supercooled water into the atmosphere and colliding with the baffle, the supercooled state of the water is eliminated, the water is iced, and dropped into the ice storage tank through the gutter, A technique for more reliably preventing freezing of the water circuit is also a known technique.

[0004]

However, in the latter one of the above-mentioned conventional ones, the distance between the heat exchanger and the supercooling elimination part is provided because the supercooling elimination part is provided above the ice storage tank. If the length is too long, the supercooled state may be eliminated by the piping between them. Therefore, since the heat exchanger must be provided near the ice storage tank, there is a problem in that the design such as bending of the water pipe becomes difficult, and the design restrictions are large.

[0005] On the other hand, in the former one of the above-mentioned conventional ones, it is necessary to install a gutter having a considerable difference in height above the ice storage tank as a supercooling elimination part, which again imposes a large design restriction. Further, there is a problem that heat is wasted due to heat exchange with the atmosphere because the time of exposure to the air is long.

[0006] The present invention has been made in view of such a point, and an object thereof is to provide a flow passage through which water or an aqueous solution flows,
An object of the present invention is to provide an ice making device that continuously and stably makes ice by providing a heat exchanger that can generate iced products that can be transported by water or an aqueous solution.

[0007]

In order to achieve the above object, the means according to claim 1 has a water flow passage (20) through which water or an aqueous solution flows, as shown in FIG. disposed 20) within the heat exchanger ice making section (4) (4
It is assumed that the ice making device is configured to transport the ice after the water or the aqueous solution is iced in 1) .

Then, as shown in FIGS. 2 and 3, the ice making part (41) of the heat exchanger (4) extends in the vertical direction.
And forming a substantially cylindrical shape, provided with a large number of bottomed holes to be immersed in water or an aqueous solution to the outer peripheral surface (44, ...)
You. Further, the ice making section (41) is connected to each of the bottomed holes (44,
…) And an inner cylindrical member (42) forming a bottom portion, and each bottomed hole
The axis of (44,...) Is at least toward the open side of the hole.
Each bottomed hole is formed so that it is formed more upward than horizontal.
(44,...) And the outer cylindrical member (43) forming the inner wall portion.
Configure.

Furthermore, heating means for heating a cooling means for cooling to Korika water or an aqueous solution in the above bottomed holes (44, ...), the ice product produced by the cooling means (45, ...) Is provided.

Further , the outer cylinder member (43) is provided with a thermal expansion coefficient.
Is equal to or higher than the coefficient of thermal expansion of the inner cylindrical member (42).
It is a structure formed by a material.

The means taken by the invention of claim 2 is shown in FIG.
As shown in FIG.
A heat exchanger provided in the water flow passage (20).
In the ice making section (41) of (4), water or an aqueous solution is
After that, it is assumed that the ice making device is designed to transport the ice.
You.

The heat exchangers (4a to 4c) are used in duplicate.
Arrange several pieces, and make the ice making section (4) of each heat exchanger (4a-4c).
In 1), a number of bottomed holes immersed in water or aqueous solution
(44,...), And each bottomed hole (44,.
The axis at least towards the open side of the hole than horizontally
Form upward.

Further, each of the heat exchangers (4a to 4c) has
A plurality of pressure reducing mechanisms (3a to 3c) provided correspondingly
And a refrigerant provided for each of the heat exchangers (4a to 4c).
Flow direction from the condenser (2) to the pressure reducing mechanism (3a to 3a).
c) through the heat exchangers (4a-4c)
And flow directly from condenser (2) to heat exchangers (4a-4c)
Path switching means (101a to 101a)
1c). Also, for some heat exchangers
The refrigerant is allowed to flow directly from the condenser (2) and the hole with the bottom (4
4, ...) to separate the iced material and other heat exchangers
Depressurize the liquid refrigerant cooled by the above part of heat exchanger
Circulated through the mechanism and water or
Each path switching means (101a-1
01c) for controlling simultaneous operation of peeling and ice making
The configuration is as follows.

[0014]

According to the above construction, in the first aspect of the present invention, in the heat exchanger (4) disposed in the water flow passage (20), water or the like flowing through the water flow passage (20) is cooled by the cooling means. Thus, iced substances (45,...) Are generated on the surface of the ice making section (41) of the heat exchanger (4). At that time, the ice making section (4
1) are formed with a number of bottomed holes (44,...), And each bottomed hole (41) is opened upward from a horizontal line.
When the generated iced material (45,...) Is heated by the heating means and melts from near the bottom of the bottomed hole (44,...), Ice is naturally produced by the buoyancy of the iced material (45,...). Released from part (41). Then, the stripped particulate ice products (45, ...) is sent transportation.

In this case, the water or the like is not supercooled, but the bottomed holes (4) of the ice making section (41) of the heat exchanger (4) are not cooled.
(4,...) Are directly generated in the ice making section (41) of the heat exchanger (4), and there is almost no possibility that the inside of the ice making section (41) is frozen. Will be done.

The ice making part (41) of the heat exchanger (4) is
Since it is cylindrical, a number of holes with bottoms (4
4, ...) can be provided, and the device can be downsized.
You.

Further, an outer cylinder part constituting the ice making part (41)
The material (43) has the same thermal expansion coefficient as the inner cylinder member (42).
The ice making part (4
Even when 1) is cooled, the inner cylinder member (42) -the outer cylinder portion
There is no gap between the members (43). Therefore, this
The gap freezes and the ice making performance deteriorates
Will be prevented.

According to the second aspect of the present invention, simultaneous operation of peeling and ice making is performed.
Means for controlling the switching of the path switching means (101).
You. That is, in some heat exchangers (for example, 4a), condensation
Ice by the relatively high-temperature refrigerant flowing directly from the vessel ( 2)
(45,...) Are removed. Then this hot exchange
Heat exchange using the low-temperature liquid refrigerant cooled by the heat exchanger
(4b, 4c) with holes (44,...)
Ice movement is performed. This effectively utilizes the heat of the refrigerant
As a result, the ice making efficiency is improved.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a refrigerant piping system of an ice making apparatus according to a first embodiment. (1) is a compressor that sucks a low-pressure gas refrigerant, compresses it into a high-pressure gas refrigerant, and discharges it. A condenser for condensing and liquefying the refrigerant discharged from the compressor (1). For the compressor (1) and the condenser (2), 3
The first to third ice making units (A to C) are arranged, and each of the ice making units (A to C) exchanges heat between a refrigerant and water or an aqueous solution (hereinafter referred to as water or the like). First for
The third to third heat exchangers (4a to 4c) are arranged, and the first to third electric expansions functioning as pressure reducing valves only during ice making are provided on the liquid tube side of each of the heat exchangers (4a to 4c). Valve (3a
To 3c), and first to third gas on-off valves (6a to 3c) for opening and closing passages on the gas pipe side of each heat exchanger (4a to 4c).
6c) is interposed. The above devices are connected by a refrigerant pipe to form a closed circuit main refrigerant circuit (9).

In addition, (7a-7c) is connected in parallel with each electric expansion valve (3a-3c) to the liquid pipe of each heat exchanger (4a-4c), and each heat exchanger (4a-4c) The first to third check valves permitting only the flow of the refrigerant from the side, and (5) are connected to the liquid pipe between the condenser (2) and the first electric expansion valve (3a) of the main refrigerant circuit (9). This is an interposed liquid on-off valve.

A liquid pipe between the condenser (2) and the liquid on-off valve (5) of the main refrigerant circuit (9) is connected to each heat exchanger (4a).
-4c)-refrigerant pipes (parts that can be liquid pipes or gas pipes) between the gas on-off valves (6a-6c) are first to third, respectively.
They are connected by a bypass passage (10) via bypass on-off valves (11a to 11c).

The first to third water circulation paths (20a to 20c) for circulating water and the like in an ice storage tank (not shown) are provided in the heat exchangers (4a to 4c) of the ice making units (A to C). 20c)
Are connected to each other, and each water circulation path (20a to 20c)
First to third water flow control valves (21a to 21c) for adjusting the flow rate of water or the like are provided on the outward path side.

That is, in each of the ice making units (A to C), when the refrigerant is circulated from each of the electric expansion valves (3a to 3c ), the refrigerant is evaporated in each of the heat exchangers (4a to 4c) to form water or the like. Gas on-off valves (6a-6c)
Is closed, and when the bypass on-off valves (1a to 11c) are opened, the relatively high-temperature liquid refrigerant condensed in the condenser (2) is passed through the heat exchangers (4a to 4c) to remove the iced material. (4a to 4c), and separated from the water circulation path (20a to 20c).
c) to be transported to an ice storage tank.

Next, FIGS. 2 and 3 show each of the above heat exchangers (4).
a to 4c) showing a structure of a heat transfer tube (41) which is an ice making part, wherein the heat transfer tube (41) includes a copper inner cylinder member (42);
An aluminum outer cylinder member (43) provided on the outer peripheral side of the inner cylinder member (42);
2) and a plurality of bottomed holes (44,...) Having an axis inclined upward at a certain angle over the outer cylinder member (43) are formed in a honeycomb-like distribution and formed in the inner cylinder. Member (4
2) constitutes the bottom of each bottomed hole (44,...), And the outer cylinder member (43) constitutes the inner wall of each bottomed hole (44,...).

The outer cylinder member (43) is manufactured by die-casting aluminum or the like and having a honeycomb-shaped hole having an axis inclined in one direction, and this flat plate is used as the inner cylinder member (42). Or after the flat plate is formed into a cylindrical shape, the flat plate is fitted to the inner cylindrical member (42).

The refrigerant in the refrigerant circuit (9) flows through the inside of the inner cylinder member (42), while flowing through the outer cylinder member (43).
Around the water circulation water (20a-20c), etc.,
Heat exchange between the refrigerant and water or the like is performed. That is, at the time of ice making, the refrigerant flows through the inside of the inner cylinder member (42) while evaporating, thereby cooling water or the like from the bottom of each of the bottomed holes (44,. (44, ...)
Cup-shaped iced material (4) extending from the bottom to a part of the side wall
5, ...). When the iced substance (45,...) Is separated from the heat transfer tube (41), the inner cylinder member (4
2) High-temperature refrigerant is circulated inside, and iced material (45, ...)
Is melted so as to be quickly released from the heat transfer tube (41) by the buoyancy of the iced material (45,...) Itself and the flow of water or the like.

Here, the diameter of each of the bottomed holes (44,...) Is set to about 3 mm, and the size of the substantially rice grain-sized
5,...) To balance buoyancy and transport performance. That is, the iced substance (4
If the size of (5,...) Exceeds 0.1 cm ³ , the buoyancy becomes too large and the transport performance in the water circulation path (20a to 20c) is deteriorated. The following is preferred.

Next, the operation control of the ice making device will be described with reference to the following Table 1 and the time chart of FIG. Table 1 below shows the open / close state of each valve in the operation mode.

[0030]

[Table 1] As shown in Table 1, when making ice with both ice making units (A to C) (at time to in FIG. 4), each electric expansion valve (3a to 3c) holds an appropriate degree of superheat of the refrigerant. Open to the degree of opening, close each of the bypass on-off valves (11a to 11c), open each of the water volume control valves (21a to 21c), each of the gas on-off valves (6a to 6c), and all of the liquid on-off valves (5). ,
The liquid refrigerant condensed in the condenser (2) is supplied to each electric expansion valve (3a
To 3c), evaporate in each of the heat exchangers (4a to 4c), and after merging, circulate back to the compressor (1).

Next, as shown in FIG. 1, each heat exchanger (4a to 4a)
When c) is arranged in parallel in the refrigerant circuit (9), the first ice making unit (A) near the condenser (2) has a large capacity, so that ice making is performed first. Then, the iced substances (45,...) Are sequentially peeled from the first ice making unit (A) side. At this time (time t1 in FIG. 4), the liquid on-off valve (5) is closed and the first The gas on-off valve (6a) is closed, the first bypass on-off valve (11a) is opened, and the first electric expansion valve (3a) is fully opened. Further, in order to suppress the release of warm heat to water or the like, the first water amount control valve (21a) is throttled to a low opening, and the valves (21b, 21c) of the second and third ice making units (B, C) are reduced. Is controlled in the same manner as before. That is, the high-temperature liquid refrigerant flows through the first heat exchanger (4a) via the bypass path (10), and
..), The hydrated substances (45,...) Generated on the surfaces of the heat transfer tubes (41,...) Of the first heat exchanger (4a) are peeled off. In the first heat exchanger (4a), the hydrate (4
, 5) through the first motor-operated expansion valve (3a) and the first check valve (7a) to supply the second and third motorized expansion valves (3b, 3c). )
Here, the decompressed refrigerant is supplied to the second and third heat exchangers (4b, 4b).
Evaporation is performed in c) to make ice making with high efficiency.

Further, when the peeling of the iced substances (45,...) In the first ice making unit (A) is completed and the ice making in the second ice making unit (B) is completed (time t2 in FIG. 4), the liquid on-off valve is opened. (5) remains closed and the first bypass on-off valve (11
a) is closed and the first gas on-off valve (6a) is opened to control the first electric expansion valve (3a) to an appropriate opening degree, and the second bypass on-off valve (11b) is opened to open the second electric expansion valve (3b). Is fully opened, and the second gas on-off valve (6b) is closed. The valves of the third ice making unit (C) are controlled in the same manner as before. Further, the first water flow control valve (21a) is opened, and the second water flow control valve (21b) is throttled. Thereby , the iced substances (45,...) Are peeled off in the first heat exchanger (4a).
In the same manner as when separated , the iced substances (45,...) In the second heat exchanger (4b) are peeled off, while the first heat exchanger (4b) is separated.
After the iced substance (45,...) previously generated in a) is transported to the ice storage tank, ice making is performed again, and the ice making operation in the third heat exchanger (4c) is continued.

When the ice making in the second ice making unit (B) is completed (time t3 in FIG. 4), the opening and closing of each valve is switched in the same manner as described above, so that the icing material (C) in the third ice making unit (C) is changed. 45), and ice making in the first and second ice making units (A, B).

When the peeling of the iced substances (45,...) In the third ice making unit (C) is completed (time t in FIG. 4).
4) Simultaneous ice making in all the units (A to C) is performed again, and then the iced products (45,
…) Is performed in the same procedure as described above, and the iced material is gradually stored in the ice storage tank.

The above control constitutes the simultaneous peeling-ice making operation control means (102) according to the second aspect of the present invention.

In the above control, the completion time of ice making is detected from the evaporation temperature of the refrigerant.

Therefore, in the above embodiment, in the heat exchanger (4) disposed in the water circulation path (20), the water and the like flowing through the water circulation path (20) are cooled by heat exchange with the refrigerant, and the heat exchanger (4) is cooled. Iced products (45,...) Are generated in the bottom holes (44,...) Of the heat transfer tube (41), which is the ice making unit of (4). At this time, since the axis of each bottomed hole (41) is formed at least above the horizontal line, the generated hydrate (45,...) Is heated, and the boundary with the heat transfer tube (41) is melted. Then, the frost (45,...) Is naturally released from the heat transfer tube (41) by buoyancy. Therefore, by transporting the separated iced substances (45,...) To the outlet side, the granular iced substances (45,...) Can be used.

In this case, as in the above-mentioned conventional publication, if supercooling is performed by a heat exchanger and supercooling is eliminated at the downstream side of the water circulation path to generate iced products, the supercooling state is established. Dust and tiny ice chips, which become ice nuclei, are present inside water, etc., so there is a strong possibility that freezing will occur in the heat exchanger tubes of the heat exchanger due to slight changes in conditions. Have difficulty. On the other hand, in the present invention, instead of supercooling water or the like, iced products (45,...) Are directly placed in each bottomed hole (44,...) Of the heat transfer tube (41) of the heat exchanger (4). Since it is generated, there is almost no possibility that the inside of the heat transfer tube (41) of the heat exchanger (4) is frozen. Therefore, it is possible to stably and continuously produce dynamic ice having fluidity.

When the diameter of each bottomed hole (44,...) Of the heat transfer tube (41) of the heat exchanger (4) is set to 5 mm or less, flakes (45,...) Of rice grains are generated. . Therefore,
Like a large iced substance, the buoyancy is not so great that it is difficult to transport it by floating on the surface of water or the like in the water circulation path (20), and a moderate buoyancy and the transport performance of the iced substance (45,...) Can be obtained. Will be.

In particular, as in the above embodiment, the heat transfer tube (41) of the heat exchanger (4) is formed by the inner cylinder member (42) and the outer cylinder member (43). When the other side is made of a material having a high thermal conductivity (copper in the above embodiment), ice is formed from the bottom of the bottomed hole (44,...) At the time of ice making, so that the iced substance (45,. Is obtained, and also at the time of peeling, it is melted from the bottom boundary surface, so that peeling becomes easy.

Further, the shape of the heat transfer tube (41) of the heat exchanger (4) is not limited to the cylindrical shape as in the above embodiment, but may be, for example, a dish shape and may have a large number of openings having an opening surface above. May be provided with a bottomed hole. However, by forming the heat transfer tube (41) into a cylindrical shape as in the above embodiment, a number of bottomed holes (44,...) Can be provided in the heat transfer tube (41), and the size of the device can be reduced.

Further, in this case, the heat transfer tube (41) is composed of an inner tube member (42) and an outer tube member (43), and the outer tube member (43) is made of a material having a thermal expansion coefficient equal to or higher than that of the outer tube member (43). When the heat transfer tube (41) is cooled during ice making,
Since there is no gap between the inner cylinder member (42) and the outer cylinder member (43), it is possible to effectively prevent the gap from freezing and deteriorating the ice making performance.

The cooling means and the heating means of the present invention are not limited to those using the refrigerant of the refrigerant circuit (9) as in the above-mentioned embodiment. For example, heating and cooling by a thermo module, electric heaters, etc. It is also possible to heat with. However, as in the above embodiment, when cooling or heating water or the like is performed using the refrigerant in the refrigerant circuit (9),
This makes it possible to effectively use the cold heat and the warm heat of the refrigerant, for example, to use the heat storage of the air conditioner to increase the operation efficiency.

In particular, a plurality of heat exchangers (4a to 4c) and route switching means (101a to 101c) are arranged, and one of the heat exchangers (for example, 4a) is operated by the simultaneous peeling-ice making means.
The liquefied refrigerant (45,...) Is separated by heat exchange with the liquid refrigerant flowing directly from the condenser (2), and the other heat exchange is performed using the low-temperature liquid refrigerant supercooled by the heat exchange. In the case where ice making is performed by a vessel (for example, 4b, 4c), ice making can be performed in a low temperature state, and ice making efficiency can be improved.

[0045] The configuration of the refrigerant piping system is not limited to the above embodiments, other configurations are possible. For example, FIG. 5 shows a modification of the above-described embodiment. Each of the ice making units (A to C) has first to third electric expansion valves (3a to 3c), 3 heat exchangers (4a-4
c), gas on / off valves (6a to 6c) are arranged, and liquid on / off valves (5a to 5c) are individually provided in the liquid pipes between the electric expansion valves (3a to 3c) and the condenser (2). Is interposed,
These liquid on-off valves (5a to 5c) -electric expansion valves (3a to 3)
c) and the pipe between the heat exchanger (4a-4c) and the gas on-off valve (6a-6c) are each provided with two check valves (12
a to 12c) and (13a to 13c) via a bypass (10). In addition, each heat exchanger (4
The configurations of the heat transfer tubes (41,...) of (a) to (4c) are the same as in the above embodiment.

Then, utilizing this refrigerant circuit (9),
The ice making operation in each operation mode is performed as shown in Table 2 below. Note that this peeling-ice making control is the same procedure as the time chart of FIG.

[0047]

[Table 2] That is, when ice is made in all the ice making units (A to C), the opening degree of each of the electric expansion valves (3a to 3c) is controlled appropriately, and each of the liquid on / off valves (5a to 5c) and the gas on / off valve (6a). ~
6c) and the water amount control valves (21a to 21c) are both opened to evaporate the refrigerant in the heat transfer tubes (41,...) Of the heat exchangers (4a to 4c), thereby cooling water and the like to make ice. Do.

When the iced product is separated in the first ice making unit (A) and ice is made in the second and third units (B, C), the first liquid on / off valve (5a) is kept open and the first liquid on / off valve (5a) is kept open. 1
By closing the gas on-off valve (6a) and fully opening the first electric expansion valve (3a), the liquid refrigerant is condensed from the condenser (2) and consequently directly to the first heat exchanger (4a) without going through the pressure reducing mechanism. To separate the iced substances (45,...). On the other hand, the second and third
By closing the liquid on-off valves (5b, 5c), the liquid refrigerant supercooled in the first heat exchanger (4a) is passed through the bypass passage (10) to the second and third electric expansion valves (3b, 3c). ) And make ice in the second and third heat exchangers (4b, 4c).

When the frost (45,...) Is separated in the second ice making unit (B), the second electric expansion valve (3b) is fully opened and the second gas on-off valve (6b) is closed. , While the second heat exchanger (4b) separates the iced substances (45,...), The opening degrees of the first and third electric expansion valves (3a, 3c) are adjusted appropriately, and the first and third electric expansion valves (3a, 3c) are adjusted. Liquid on-off valve (5a, 5
c) is closed and the first and third gas on-off valves (6a, 6c) are opened, so that the first and third heat exchangers (4a, 4
Perform ice making in c).

When the iced products (45,...) Are peeled off in the third ice making unit (C), it is the same as described above, and the description is omitted. In addition, the water amount control valves (21a-21)
c) is squeezed only when peeling iced substances (45,...), and is opened during ice making.

Therefore, in the above-mentioned modification, as in the above-described embodiment, a plurality of heat exchangers (4a to 4c) are used and one of the heat exchangers (for example, 4a) is used to form the hydrated material (45, 4a).
..) While removing the other heat exchanger (eg, 4b, 4b).
Ice making can be performed in c), and the same effect as in the above embodiment can be obtained.

In the above embodiment, the water circulation path (20)
As the liquid flowing through the water, not only water but also an aqueous solution such as brine can be used.

[0053]

As described above, according to the first aspect of the present invention, the heat exchanger is disposed in the flow passage through which the water or the aqueous solution flows, and the water or the like is transported by icing the water or the like with the heat exchanger. As the configuration of the ice making device, a large number of upward bottomed holes immersed in water or the like are provided in the ice making section of the heat exchanger, and the water or the like is cooled in each of the bottomed holes to produce iced material at the bottom. At the same time, the iced material is heated to be separated from the bottom hole, so that continuous ice making can be stably performed without supercooling water or the like.

The ice making part of the heat exchanger is formed in a substantially cylindrical shape.
Since the bottomed holes are provided on the outer peripheral side of the cylinder,
Many bottom holes can be provided in the
The size can be reduced.

Further, the ice making section is formed with the bottom of the hole with the bottom.
And an outer cylinder member forming an inner wall portion.
A material with the same or higher thermal expansion coefficient as the inner cylinder member than the inner cylinder member
Since both parts were formed during ice making and cooling,
Poor ice making function due to freezing of water etc.
Can be prevented.

According to the invention of claim 2, the above-mentioned claim is provided.
In the same manner as the effect according to the invention described in item 1, the hole is formed in the bottom hole.
Continuous ice making can be performed stably by peeling off iced material.
Can be. In addition, some heat exchangers are used for heat exchange with refrigerant.
More iced material is separated, and the refrigerant cooled by this heat exchange is removed
Through a decompression mechanism to make ice.
Ice making and icing while reducing heat loss
Can be performed at the same time, thus improving ice making efficiency.
Improvement can be achieved.

[Brief description of the drawings]

FIG. 1 is a piping diagram of an ice making device according to an embodiment.

FIG. 2 is a perspective view showing an external structure of a heat transfer tube of the heat exchanger.

FIG. 3 is a partial sectional view showing a vertical sectional structure of a heat transfer tube of the heat exchanger.

FIG. 4 is a time chart illustrating a change in an operation state of the first to third ice making units.

FIG. 5 is a piping diagram of an ice making device according to a modification of the embodiment.

[Explanation of symbols]

 2 Condenser 3 Electric expansion valve (decompression mechanism) 4 Heat exchanger 41 Heat transfer tube (ice making part) 42 Inner cylinder member 43 Outer cylinder member 44 Bottom hole 45 Iced material 101 Route switching means

Claims (2)

(57) [Claims] 1. A water flow passage (2) through which water or an aqueous solution flows.
0) , and water or an aqueous solution is frozen in the ice making section (41) of the heat exchanger (4) disposed in the water flow passage (20).
And then transporting the ice, wherein the ice making section (41) of the heat exchanger (4) extends in a vertical direction.
And a plurality of bottomed holes (44, 44) immersed in water or an aqueous solution.
…)), While the ice making part (41) has
An inner cylinder member (42) forming the bottom of the hole (44, ...);
The axis of each bottomed hole (44,...) Is at least open to the hole
Side so that it is formed more upward than horizontal.
An outer cylindrical member forming an inner wall portion of each bottomed hole (44,...)
(43) and is configured de, a cooling means for cooling to Korika water or an aqueous solution in the above bottomed holes (44, ...), the cooling means ice product produced by (45, ...) and Tei and a heating means for heating
Te, the outer tube member (43) has a thermal expansion coefficient inner cylindrical member (42)
An ice making device characterized by being formed of a material having the same or higher thermal expansion coefficient . 2. A water flow passage (2 ) through which water or an aqueous solution flows.
0) and heat exchange disposed in the water flow passage (20).
Water or aqueous solution is frozen in the ice making part (41) of the vessel (4)
And then transporting the ice, wherein a plurality of the heat exchangers (4a to 4c) are arranged and each heat exchanger
The ice making part (41) of the exchangers (4a to 4c) is made of water or an aqueous solution.
Having a number of bottomed holes (44, ...) immersed therein.
The axis of each bottomed hole (44, ...) is at least the opening of the hole
The heat exchangers (4a to 4c) are provided so as to face upward from the horizontal direction.
A plurality of pressure reducing mechanisms (3a to 3c) and a plurality of pressure reducing mechanisms (3a to 3c) are provided for each of the heat exchangers (4a to 4c).
From the condenser (2) to the pressure reducing mechanism (3a to 3c)
Through which heat is passed through heat exchangers (4a-4c) and condensation
Flow directly from the heat exchanger (4a to 4c) from the heat exchanger (2)
Switching Ru path switching means and the path (101 a to 101 c)
And the refrigerant flows directly from the condenser (2) to some heat exchangers.
Through the bottom holes (44, ...)
In both cases, the other heat exchangers are cooled by some of the above heat exchangers.
Refrigerated liquid refrigerant is circulated through the pressure reducing mechanism,
(44, ...) cut each path to make water or aqueous solution ice
To control the changing means (101a to 101c)
Ice making device, comprising:
Place.