JP2005315475A - Heat transfer tube type method and device for making ice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat transfer tube type method and device for making ice requiring less installation area, enabling the device to be easily installed at site, providing excellent area efficiency, and providing a high ice-making/concentrating efficiency. <P>SOLUTION: This ice-making device for water solution comprises a cold source tank 51, a heat source unit 50 formed by integrally installing a hot source tank 52, a brine cooler unit 53, and a control panel 56 on an L-shaped base 54, and an ice-maker unit 10 formed by integrally installing a fresh water tank 11, a raw liquid tank 12, and an ice-maker body 1 on a rectangular base 13. Space can be saved by putting the ice-maker unit 10 in the L-shaped recessed part of the heat source unit 50, and both the ice-maker unit and the heat source unit are connected to each other through a brine pipe 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat transfer tube type ice making method and an apparatus thereof, and in particular, imparts cold energy obtained via a refrigerant or brine to a cylindrical body having a heat transfer surface to provide an aqueous solution to be frozen (including raw water) as described above. The present invention relates to a heat transfer tube type ice making method and apparatus for growing a layered ice in a thickness direction of a cylindrical heat transfer surface while flowing along the heat transfer surface to make or concentrate the aqueous solution.

  For example, the freeze-concentration crystallization method disclosed in Patent Document 1 relates to a freeze-concentration crystallization method in which a solution is cooled and concentrated by freezing water in the solution, and a solute in the solution is crystallized. In other words, the ice crystals produced by freezing are grown from the heat transfer surface in a state of being stuck on the heat transfer surface, making it easy to separate the ice crystal from the solution. By growing layered ice on the cooling surface in the thickness direction, the solute component is removed from the solid-liquid interface to the solution side as the freezing interface progresses. However, such prior art is not intended for ice making.

As a technology to achieve both ice making and aqueous solution concentration, a refrigerant is passed through and circulated in a double-pipe inner cylinder to form a heat transfer surface on the inner cylinder surface, and rotation of the aqueous solution to be frozen along the heat transfer surface Patent Document 2 discloses a technique for growing layered ice in the thickness direction by mass transfer along the heat transfer surface caused by flow.
JP 2000-334204 A JP 2003-28546 A

However, according to such a conventional technique, the ice making / concentrating section is a single cylinder and has a batch structure, so that the ice making capacity is limited.
Furthermore, in the prior art, the layout relationship between the cold heat source and the warm heat source is not clear, and therefore, examination of downsizing of the apparatus, examination of on-site construction, and examination of smoothly breaking ice formed into a cylindrical shape have been made. Not.
SUMMARY OF THE INVENTION The present invention provides a heat transfer tube type ice making method and apparatus capable of obtaining ice making / concentrating efficiency with high area efficiency with a reduced installation area and easy on-site construction, in view of the problems of the prior art. For the purpose.

Therefore, in order to solve this problem, the present invention applies cold energy obtained via a refrigerant or brine to a cylindrical body having a heat transfer surface, and an aqueous solution to be frozen (including raw water) is added to the heat transfer surface. In the heat transfer tube type ice making method in which layered ice is grown in the thickness direction of the cylindrical heat transfer surface while flowing along, and the aqueous solution is made or concentrated,
The cylindrical body is a cylindrical body group composed of a plurality of cylindrical bodies arranged in parallel, forming a circulation space at both ends of the cylindrical body, and the flow of the aqueous solution through the circulation space. The aqueous solution is iced or concentrated while the aqueous solution circulates in series from the first cylindrical body or cylindrical body group to the second cylindrical body or cylindrical body group.
In this case, when the cylindrical body is a cylindrical body group made up of a plurality of cylindrical bodies arranged in parallel vertically, the cylindrical body group is provided at the bottom of the lower circulation space located below the cylindrical body group. An ice crusher and an ice receiving container are arranged below the open / close door having a sealing function so that the ice is crushed and received by the natural fall of the cylindrical ice that has been deiced by applying thermal energy to the cylindrical body. If the aqueous solution circulates in series from the first cylindrical body group to the second cylindrical body group while changing the flow of the aqueous solution through the circulation space, It is preferable that there is a distribution means, and the aqueous solution is distributed to each cylindrical body of the second cylindrical body group via the distribution means.

The invention described in the fourth and subsequent aspects is an invention relating to an apparatus for suitably carrying out the invention, in which cold energy obtained via a refrigerant or brine is applied to a cylindrical body having a heat transfer surface, and an aqueous solution to be frozen ( In a heat transfer tube type ice making device that grows layered ice in the thickness direction of the cylindrical heat transfer surface while flowing along the heat transfer surface (including raw water), and ice-making or concentrating the aqueous solution,
The cylindrical body is composed of a cylindrical body group composed of a plurality of cylindrical bodies arranged in parallel. A circulation space is formed at both end openings of the cylindrical body, and the aqueous solution flows through the circulation space. It is characterized by having an ice maker configured to circulate an aqueous solution in series from the first cylindrical body or group of cylindrical bodies to the second cylindrical body or group of cylindrical bodies while changing the above.
Also in this case, when the cylindrical body is a cylindrical body group consisting of a plurality of cylindrical bodies arranged in parallel vertically, the bottom portion of the lower circulation space where the ice making device is located below the cylindrical body group An ice maker having an opening / closing door having a sealing function provided in the ice maker, wherein an ice crusher and an ice receiving container are sequentially arranged below the ice maker, and the ice is removed by applying thermal energy to the cylindrical body It may be configured such that ice is naturally crushed and received, and the flow of the aqueous solution is changed through the circulation space from the first cylindrical body group to the second cylindrical body group. When the aqueous solution circulates in series, a distribution means such as a baffle plate extending toward the circulation space is disposed between adjacent cylindrical bodies constituting the cylindrical body group, and the distribution means It is preferable that the aqueous solution is distributed to each cylindrical body of the second cylindrical body group via the.
The ice breaker is an ice breaker having two upper and lower ice breaking rotation teeth, the upper ice breaking rotation tooth is a fixed rotation tooth having a fixed ice breaking density, and the lower ice breaking. The rotating tooth group for density setting is preferably a variable rotating tooth group with variable ice breaking density, and when the cold energy is brine cooled by a refrigerant, the ice maker is below the cylindrical body group. An ice maker having an open / close door having a sealing function provided at the bottom of the lower circulation space located in the ice maker, wherein an ice maker and an ice receiving container are sequentially arranged below the ice maker,
Provided with a heat source unit in which a brine cooler for cooling and heating the brine by the refrigeration cycle, a cold brine tank for storing the cooled cold brine, and a warm brine tank for storing the heated warm brine are provided, Adjacent or combined arrangements are preferred.

According to the present invention, since the plurality of cylindrical bodies constituting the ice making / concentrating part are arranged in parallel in parallel, and it has a substantially serial structure through the circulation space, it is possible to save space. Moreover, a large ice making capacity can be obtained.
In addition, an ice breaker and an ice receiving container are sequentially arranged below the ice making device, and an ice making unit is configured so that ice is crushed and received by natural falling of the cylindrical ice that has been deiced by applying thermal energy to the cylindrical body. If this is configured, it is possible to further reduce the space and reduce the driving mechanism and driving force.
Further, a distribution means such as a baffle plate extending toward the circulation space is disposed between adjacent cylindrical bodies constituting the cylindrical body group, and the second cylindrical body group is disposed via the distribution means. If an aqueous solution is distributed to each cylindrical body, a two- to three-stage ice maker can be configured without necessarily forming an in-line multistage structure between the cylindrical bodies. Makes it possible to make homogeneous ice.

Further, the ice breaker is an ice breaker having two upper and lower ice breaking rotation teeth, the upper ice breaking rotation teeth are fixed rotation teeth having a fixed ice breaking density, and the lower ice breaking Since the rotating tooth group for setting the density is a variable rotating tooth group having a variable ice breaking density, ice having an appropriate ice breaking density can be obtained without applying a significant load to the drive source.
Further, the ice maker unit and the heat source unit are configured as described above, and the two are disposed adjacent to each other, so that the apparatus can be downsized and the construction on site can be facilitated.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

  FIG. 1 is a schematic diagram showing a schematic configuration of an aqueous ice making / freezing and concentrating apparatus (hereinafter referred to as an ice making apparatus) according to the present invention. FIGS. 2 and 3 show a unit layout configuration of the apparatus shown in FIG. A plan view and FIG. 3 are front views. FIG. 4A is a front sectional view of a principal part showing another embodiment of the ice making device main body of FIG. 1, and FIG. 4B is a sectional view taken along line AA of FIG.

  As shown in FIGS. 1 and 2, the aqueous ice making apparatus of the present invention has a cold heat source tank 51, a hot heat source tank 52, a brine cooler unit 53, and a control panel 56 integrally installed on an L-type base 54. The heat source unit 50, the fresh water tank 11, the stock solution tank 12, and the ice maker body 1 are composed of an ice maker unit 10 that is integrally installed on a rectangular base 13, and the ice maker unit 10 is formed in an L-shaped recess of the heat source unit 50. It enters and saves space, and both are connected by a brine pipe 14. The brine pipe 14 is configured such that warm brine and cold brine can be selectively introduced to the ice making device main body 1 side via the three-way valve 15 and the pump 16.

  FIG. 3 shows a layout configuration on the ice making unit 10 side. Under the ice making body 1, an ice breaker 4 that breaks the cylindrical ice that naturally falls from the ice making body 1 and the ice that has been crushed under it are received. In order to function as a latent heat storage tank by icing, the cold water (medium water) in the lower reservoir is circulated through the heat exchanger 62 by the pump 61, and the clean water is cooled by the heat exchanger 62. It is comprised from the ice receiving container 6 to make.

Next, the structure of the ice maker main body 1 of this apparatus is demonstrated based on FIG.
The ice maker body 1 includes a rectangular outer container 21 having a passage through which cold brine or warm brine flows, and five rectangular inner cylinders suspended vertically in the longitudinal direction in the outer container 21. 22a ... are arranged in parallel, and adjacent to the upper and lower sides of the inner cylinders 22a ..., the stock solution repeats rising and lowering from the left inner cylinder 22a to the right inner cylinder 22b. Liquid circulation spaces 23 and 24 configured to circulate in series are formed.
In the upper circulation space 23 of the liquid circulation space, there are partition plates 25 (walls) between the first inner cylinder 22a and the second inner cylinder 22b and between the third inner cylinder 22c and the fourth inner cylinder 22d, respectively. In the lower circulation space 24, partition plates 26 (walls) are provided between the second inner cylinder 22b and the third inner cylinder 22c, and between the fourth inner cylinder 22d and the fifth inner cylinder 22e, respectively. The lower circulation space 24 of the fifth inner cylinder 22e and the upper circulation space 23 of the first inner cylinder 22a are connected by a circulation pipe 30 in which a circulation pump 29 is interposed.
As a result, when the pump 29 is driven, the circulating fluid flows from the upper partition space 231 of the first inner cylinder 22a to the first inner cylinder 22a → the lower partition space 241 of the first and second inner cylinders → the second inner cylinder 22b. → Upper section space 232 of second and third inner cylinders → Third inner cylinder 22c → Lower section space 242 of third and fourth inner cylinders → Fourth inner cylinder 22d → Upper of fourth and fifth inner cylinders The liquid can be circulated in series between the partitioning space 233 → the fifth inner cylinder 22e and the five rectangular inner cylinders 22a that are vertically suspended to make the circulating liquid ice.

  The lower circulation space 24 has a lower partition space 241 for the first and second inner cylinders, a lower partition space 242 for the third and fourth inner cylinders, and a bottom surface of the lower partition space 243 for the fifth inner cylinder 22e. An open / close door 31 having a seal mechanism (not shown) that can be directed to the outside is provided around the outer periphery. During ice making, the open / close door 31 is closed and the circulation space 24 is sealed by the seal mechanism to circulate the liquid and make ice. On the other hand, by opening the door 31 and flowing warm brine, it can be deiced by natural fall.

As described above, the open / close door 31 has a combined function of sealing the circulating cold brine solution during ice making and opening it during ice removal due to ice falling, and for maintenance of the sealing material and prevention of wear of the sealing material, FIG. As shown in the figure, a vertical movement mechanism 312 that moves the pivot fulcrum 311 of the door 31 up and down and a rotation mechanism 313 that rotates around the pivot fulcrum 311 are attached. After raising to the sealing position, the rotation is closed, and at the time of deicing, the rotation fulcrum 311 of the door 31 is retracted downward from the sealing position and is then opened to rotate.
When pressure is applied to the sealing mechanism, the rotation of the circulation pump 29 is controlled by the action of a safety valve.

  Returning to FIG. 1, reference numeral 33 denotes a stock solution inlet / concentrate discharge port provided in the lower section space 241 of the first and second inner cylinders 22a... The stock solution is introduced into the ice making machine body 1 for ice making. On the other hand, when the ice making is completed, the three-way valve 36 is switched to drive the circulation pump 29 and the lower partition space 241 of the first and second inner cylinders 22a and 22b. More concentrated liquid is discharged to a concentration tank (not shown).

  Also, a brine circulation passage 37 (see FIG. 4) is formed in the outer container 21, and a cold heat source tank 51 (cold brine tank) and a hot heat source tank are passed through the three-way valve 15, the pump 16, and the return-side three-way valve 15. 52 (warm brine tank) are connected to each other. As a result, during ice making, cold brine is supplied from the heat source tank 51 via the pump 16 and the three-way valve 15 to the brine circulation passage 37 in the outer container 21, while when deicing, the heat source is switched by switching the three-way valve 15. It can be configured such that the warm brine is supplied from the tank 52 to the brine circulation passage 37 in the outer container 21.

The brine cooler unit 53 forms a refrigerant refrigeration cycle including a compressor 531, a condenser 532, an expansion valve 533, and an evaporator 534, and the cold heat source tank 51 (cold brine tank) exchanges heat with the evaporator 534 side to generate a heat source. The tank 52 (warm brine tank) is configured to exchange heat with the condenser 532 side and store cold brine and warm brine in the tanks 51 and 52, respectively.
The brine cooler unit 53 is composed of, for example, a refrigeration cycle using ammonia gas, and the temperature control of freezing is performed by the start / stop of the compressor and the evaporation pressure adjusting valve. In particular, when ammonia refrigerant is used, it is necessary to take measures to eliminate the leakage. Therefore, in the present invention, the secondary refrigerant (brine) is cooled by the brine cooler unit 53 and is forcedly circulated to the ice making machine body 1 by the pump 16 to indirectly transfer the heat to the aqueous solution to be frozen (raw water). Yes. Therefore, it comprises two primary refrigerant cycles and secondary refrigerant (brine) cycles, enabling highly accurate temperature control and automatic operation.

As shown in FIG. 5, the ice breaker 4 shown in FIG. 1 is provided with a motor 41, a pulley 42, and a rotating tooth group 44, 45 composed of a sprocket group driven by a belt 43 in a pair of upper and lower stages. The lower one rotation tooth group 45a is configured to be accessible to the counterpart rotation tooth group 45b using the handle shaft 46, and the ice breaking density can be changed.
The left and right rotating tooth groups 45a and 45b are configured so as not to collide with each other when the sprocket arrangement pitch position is shifted to approach the counterpart sprocket group.
5A is a plan view showing the configuration of the upper rotation tooth group, FIG. 5B is a front view of the ice crusher, and FIG. 5C is a plan view showing the configuration of the lower rotation tooth group.

  The ice receiving container 6 of FIG. 1 uses the crushed ice crushed by the ice breaker 4 to produce cold water by exchanging heat from the load with the heat exchanger 62, and in the upper part of the container, intermediate water after heat exchange is produced. Water spray 65, pump, and three-way valve for medium water use. Further, the intermediate water is configured to be stored in the fresh water tank 11.

Based on the above configuration, a suitable operation method for making or concentrating raw water of the present invention is performed based on the following procedure.
a, Fill the inner cylinder 22a... and the upper and lower circulation spaces 23 and 24 with about 70 to 90% from the raw water tank through the three-way valve 36.
b. The cold brine is introduced from the cold water brine into the outer container 21 through the three-way valve 15 to make the inner cylinder 22a. At this time, the amount of cold brine is adjusted to freeze at a slow speed.
c. As described above, in order to adjust the circulation amount of the cold brine and freeze slowly, the freezing interface advances toward the inner cylinder 22a..., but the solute component becomes a solid-liquid interface as it progresses. From the solution to the solution side.
d. After the predetermined amount of ice formation is confirmed, the pump 16 is stopped and the supply of cold brine is stopped. Thereafter, the three-way valve 36 on the stock solution tank 12 side is switched to discharge the concentrated solution to the concentrated solution tank 39.
At this time, with the aim of complete removal of the concentrated liquid, the pipe 391 is inclined so that the concentrated liquid tank 39 under the pump 36 can be quickly removed.
Further, a part of the piping is shared by the three-way valve 36 so as to simplify the concentrate removal and the stock solution supply line.
e. Next, after opening the opening / closing door 31 of the lower circulation spaces 23, 24, the three-way valve 15 is switched to the heat source tank 52 side to supply hot brine into the outer container 21, and the inner cylinder 22a. The temperature of the heat transfer surface is increased, and the cylindrical ice is peeled and deiced from the heat transfer surface.
f, at the same time, the ice breaker 4 is operated to break the cylindrical ice, but the rotating teeth 44a-44b, 45a-45b have a pair of rotating teeth 44a- The 44b and 45a-45b groups rotate toward the center side to shorten the time and stabilize the function.
The pair of left and right rotating tooth groups 44a-44b and 45a-45b are arranged in a two-stage configuration, and the one rotating tooth group 45a on the lower stage side uses the handle shaft 46 and the other rotating tooth group. It is configured to be accessible to 45b and is configured to be capable of changing the ice breaking density, for example, ice having an ice breaking diameter of 30 to 80 mm is generated.

Therefore, according to the present embodiment, the ice making device body 1, the door 31 with the sealing mechanism, the ice breaker 4 and the ice receiving container 6 are arranged in the gravity direction so that the ice is collected in the ice receiving container 6 by free fall. Therefore, a conveyance part such as a conveyor is unnecessary.
Further, the concentrate tank 39 is disposed below the ice maker main body 1 and the piping 391 from the ice maker main body 1 is inclined downward, so that the concentrate falls freely and no power is required.
Moreover, since the indirect heat | fever by the brine is used for the cooling and heating source to the inner cylinder of the ice making apparatus main body 1 instead of the refrigerant | coolant of a refrigerating cycle, even an amateur can drive | operate.
In addition, the ice making unit 10 and the heat source unit 50 are docked or arranged adjacent to each other to simplify the on-site implementation.

FIG. 4 shows a configuration of a main part of an ice making body 1 according to another embodiment of the present invention.
In the present embodiment, a rectangular outer container 21 having a passage through which cold brine or warm brine circulates, and four rectangular inner cylinders 22Ba suspended vertically in the longitudinal direction in the outer container 21. Are arranged in parallel, and the upper and lower sides of the inner cylinders 22Ba ..., the undiluted solution is adjacent to the inner cylinder group 22Ba by rising and lowering from the inner cylinder group 22Ba ... on the left side to the inner cylinder group 22Bc ... on the right side. Is configured to circulate in series, and between the outer container 21 and the upper and lower liquid circulation spaces 23B, 24B, a heat insulating material 49 is interposed, so that ice is not formed in the liquid circulation spaces 23B, 24B. doing.

The upper circulation space 23B of the liquid circulation space is formed in a dome shape, and without providing a partition plate, the first inner cylinder 22Ba and the second inner cylinder 22Bb are in upward flow, and the third inner cylinder 22Bc and the fourth inner cylinder 22Bc. The inner cylinder 22Bd is configured to circulate two cylinders each so that the liquid circulates in a downward flow.
That is, a baffle plate 48 is provided between the third inner cylinder 22Bc and the fourth inner cylinder 22Bd so as to protrude toward the upper circulation space 23B, and the dome shape is formed by the upward flow of the first inner cylinder 22Ba and the second inner cylinder 22Bb. The liquid guided to the upper circulation space 23B is equally distributed to the third inner cylinder 22Bc and the fourth inner cylinder 22Bd by the baffle plate 48 to form a downward flow.
On the other hand, in the lower circulation space 24B, a partition plate 34 (wall) is provided between the second inner cylinder 22Bb and the third inner cylinder 22Bc, and between the first inner cylinder 22Ba and the second inner cylinder 22Bb. A plate 47 is provided protruding from the lower circulation space 24 side.
As a result, the circulating fluid introduced from the circulating fluid inlet 331 provided in the lower partition space 245 of the first and second inner cylinders enters the dome-shaped upper circulating space 23B by the upward flow from the first and second inner cylinder groups. After being guided, the baffle plate 48 is equally distributed to the third and fourth inner cylinders to form a downward flow, and from the lower partition space 246 through the outlet 341, a circulation pipe similar to FIG. The circulating solution is made of ice and concentrated in the same manner as in the previous embodiment by returning to the lower partitioning space 245 of the first and second inner cylinders via the liquid inlet 331 by the pump.
As a result, the circulating fluid is divided into the lower partition space 245 of the first and second inner cylinders, the first and second inner cylinders 22Ba and 22Bb, the dome-shaped upper circulation space 23B, and the third and fourth inner cylinders 22Bc and 22Bd. A structure in which the liquid circulates in a two-row parallel group between the group → the third and fourth inner cylinders in the lower section space 246 and the four rectangular inner cylinders 22Ba, and in series between the inner cylinder groups. Is done.
In addition, since the opening and closing doors (not shown) are provided on the bottom surfaces of the lower partition space 245 and the lower partition space 246 in the lower circulation space 24B, they are the same as in FIG. During ice making, the open / close door is closed and liquid brine is circulated while flowing cold brine to make ice, while the open / close door 31 is opened and warm brine is flown to allow deicing by natural fall as in the previous embodiment. It is.

Also in this embodiment, the brine circulation passage 37 is formed in the outer container 21 sandwiched by the heat insulating material 49, and the cold heat source tank is passed through the three-way valve 15, the pump 16, and the return three-way valve 15 as shown in FIG. 51 (cold brine tank) and a hot heat source tank 52 (warm brine tank) are connected, but the illustration is omitted.
The brine circulation passage 37 is formed in two upper and lower stages directly below the heat-insulating material mounting flange of the outer container 21 made of an aluminum ice can, that is, the liquid flows in the upper and lower circulation spaces 23B and 24B, respectively. In order to prevent ice making, the heat insulating material 49 is interposed between the ice making part (outer container part) and the turn part (circulation spaces 23B and 24B), and brine is supplied to the vicinity of the flange immediately below the heat insulating material.
In the present embodiment, the baffle plates 48 and 47 for controlling the uniform flow of the turn portions (circulation spaces 23B and 24B) are vertically projected in the same manner as the inner cylinder. Does not appear.

  INDUSTRIAL APPLICABILITY The present invention can provide a heat transfer tube type ice making method and apparatus capable of obtaining ice making / concentrating efficiency with a small installation area, easy on-site construction, high area efficiency and high capacity.

The schematic structure of the ice making / freezing concentration apparatus (ice making apparatus) of the aqueous solution of the present invention is shown. 2 and 3 show a unit layout configuration of the apparatus of FIG. 1, and FIG. 2 is a plan view. FIG. 3 is a front view of FIG. (A) of the other Example is principal part front sectional drawing of an ice maker main body, (B) is the sectional view on the AA line of (A). Fig. 2 shows the ice breaker of Fig. 1. The schematic of the opening / closing door of FIG. 1 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Icemaker main body 4 Icebreaker 10 Icemaker unit 11 Fresh water tank 12 Stock solution tank 21 Outer container 22a ... Square inner cylinder 23, 24 Liquid circulation space 44, 45 Rotating tooth group 50 Heat source unit 51 Cold heat source tank 52 Heat source tank 53 Brine cooler unit

Claims (8)

The cold energy obtained through the refrigerant or brine is applied to the cylindrical body having the heat transfer surface, and the layered ice is transferred to the tube while the aqueous solution to be frozen (including raw water) flows along the heat transfer surface. In a heat transfer tube type ice making method for growing in the hot surface thickness direction and making or concentrating the aqueous solution,
The cylindrical body is a cylindrical body group composed of a plurality of cylindrical bodies arranged in parallel, forming a circulation space at both ends of the cylindrical body, and the flow of the aqueous solution through the circulation space. A heat transfer tube that performs ice making or concentration of an aqueous solution while the aqueous solution circulates in series from the first cylindrical body or group of cylindrical bodies to the second cylindrical body or group of cylindrical bodies while changing the temperature Formula ice making method. The heat transfer tube type ice making method according to claim 1, wherein the cylindrical body is a cylindrical body group composed of a plurality of cylindrical bodies arranged in parallel vertically.
An ice crusher and an ice receiving container are arranged below the opening / closing door provided at the bottom of the lower circulation space located below the cylindrical body group, and deicing is performed by applying thermal energy to the cylindrical body. The heat transfer tube type ice making method according to claim 1, wherein ice breaking and ice receiving are carried out by natural fall of the cylindrical ice. The heat transfer tube type ice making method according to claim 1, wherein the aqueous solution circulates in series from the first cylindrical body group to the second cylindrical body group while changing the flow of the aqueous solution through the circulation space. ,
The heat transfer tube type ice making method according to claim 1, wherein a distributing means is present in the circulation space, and the aqueous solution is distributed to each cylindrical body of the second cylindrical body group via the distributing means. The cold energy obtained through the refrigerant or brine is applied to the cylindrical body having the heat transfer surface, and the layered ice is transferred to the tube while the aqueous solution to be frozen (including raw water) flows along the heat transfer surface. In a heat transfer tube type ice making device that grows in the thickness direction of the hot surface and makes or concentrates the aqueous solution,
The cylindrical body is composed of a cylindrical body group composed of a plurality of cylindrical bodies arranged in parallel. A circulation space is formed at both end openings of the cylindrical body, and the aqueous solution flows through the circulation space. A heat transfer tube comprising an ice maker configured to circulate an aqueous solution in series from the first cylindrical body or group of cylindrical bodies to the second cylindrical body or group of cylindrical bodies while changing the temperature Ice making equipment. The heat transfer tube type ice making device according to claim 4, wherein the cylindrical body is a cylindrical body group composed of a plurality of cylindrical bodies arranged in parallel vertically.
An ice making machine having an opening / closing door having a sealing function provided at the bottom of a lower circulation space where the ice making machine is located below the cylindrical body group, and an ice breaker and an ice receiving container are sequentially arranged below the ice making machine. The heat transfer tube type ice making device according to claim 4, wherein ice breaking and ice receiving are performed by the natural fall of the cylindrical ice that has been deiced by applying thermal energy to the cylindrical body. The heat transfer tube ice making device according to claim 4, wherein the aqueous solution circulates in series from the first cylindrical body group to the second cylindrical body group while changing the flow of the aqueous solution through the circulation space. ,
Distributing means such as a baffle plate extending toward the circulation space is disposed between adjacent cylindrical bodies constituting the cylindrical body group, and each of the second cylindrical body groups is disposed via the distributing means. The heat transfer tube ice making device according to claim 4, wherein the aqueous solution is distributed to the cylindrical body.   The ice breaker is an ice breaker having two-stage upper and lower ice breaking rotary tooth groups, the upper ice breaking tooth group is a fixed rotating tooth group having a fixed ice breaking density, and the lower ice breaking density. The heat transfer tube type ice making device according to claim 4, wherein the setting rotary tooth group is a variable rotary tooth group having a variable ice breaking density. The heat transfer tube type ice making device according to claim 4, wherein the cold energy is brine cooled by a refrigerant.
An ice making machine having an opening / closing door having a sealing function provided at the bottom of a lower circulation space where the ice making machine is located below the cylindrical body group, and an ice breaker and an ice receiving container are sequentially arranged below the ice making machine. An ice maker unit,
A brine cooler that cools and heats the brine by the refrigeration cycle, a cold brine tank that stores the cooled cold brine, and a heat source unit in which a warm brine tank that stores the heated warm brine is disposed,
The heat transfer tube type ice making device according to claim 4, wherein the two units are adjacent to each other or connected together.

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