KR100513219B1 - Slurry ice generator - Google Patents

Abstract

The present invention relates to a slurry ice ice maker. According to one aspect of the invention, the inlet chamber is provided with an inlet for the inlet of the heat storage medium, the discharge chamber is provided with an outlet for the outlet of the heat storage medium, is located between the inlet and the discharge chamber, the inlet and outlet of the refrigerant is provided, A heat exchange chamber having a heat transfer tube extending from the inlet chamber to the discharge chamber to form a passage of the heat storage medium, a scraper inserted into the heat transfer tube and provided with a spiral blade along an outer circumferential surface thereof, and a driving device for rotating the scraper. The upstream side of the heat storage medium is a slanted ice ice maker in which the upstream side of the heat storage medium is inclined in the moving direction of the heat storage medium and the downstream side of the heat storage medium is a convex curved surface. The inlet chamber and the outlet chamber are located at the lower and upper portions of the heat exchange chamber, respectively, and may have an inclined plate provided so that the upper surface of the discharge chamber is inclined upward toward the outlet. The heat exchange chamber may be provided with a cell separation wall provided with a plurality of cells by dividing two or more heat transfer tubes into one unit cell, and a refrigerant distribution plate provided with a plurality of passage holes for uniformly supplying the introduced refrigerant to each cell.

Description

Slurry Ice Ice Maker {SLURRY ICE GENERATOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ice makers for use in dynamic ice heat storage (cold storage) systems, and more particularly to evaporative plate-type multi-slurry slurry ice ice machines.

The ice storage system, which converts energy into a cold heat state and stores and regenerates it in a latent heat form, is a powerful energy storage facility. Among these, slurry ice used in a dynamic heat storage system will be widely used as a future cold storage and cold transport means. It is expected and attention is focused. Here, ice makers that make slurry ice economically and reliably are being researched and developed in various forms as core equipment. Evaporating plate type, subcooled water type, refrigerant integrated contact type, direct freezing type of water by vacuum, etc. are being researched or developed. Among them, evaporating plate type and subcooled water type are widely used, but until now, the most reliable method is recognized as evaporating plate type. . The evaporation plate type is divided into several types, but largely divided into single tube and multi tube type, and recently, a multi-tube ice maker is being developed intensively.

The multi-tube ice maker uses the shell tube type heat exchanger as a base and supplies heat storage medium containing a small amount of freezing inhibitor inside the heat pipe, while evaporating the refrigerant to the shell side (outside the heat pipe) to remove heat and scrape continuously to prevent ice from sticking inside the heat pipe. I'm taking the form. Typical examples include a whip rod method (for example, a device described in Korean Patent Application Laid-Open No. 2001-0068584) and a plastic screw inside the heat transfer tube by using a rod pivoting the inner wall of the heat transfer tube inside the tube. A screw scraper method (for example, the device described in Korean Patent No. 10-0296653) that rotates and defrosts by rotating a scraper of a type, and a vibrating type using a motion of a spring by vibrating energy using a vibrating spring device (Example For example, the apparatus described in Korean Utility Model Model No. 20-0240787) and the like have been developed. However, despite the many advantages of each of the developed methods, a common drawback is the complexity and lack of reliability of the mechanisms that deliver the power to continuously scrape the heat transfer surfaces. Clogging by accumulation limits the general spread of slurry ice ice makers.

The technical problem to be solved in the multi-tube ice maker can be classified into four categories. Firstly, the ice maker should be continuously removed from the heat transfer surface to prevent the phase change of slurry particles from sticking and growing on the heat transfer surface. In order to prevent the growth of fine ice particles on the surface of the heat transfer surface, the supercooling degree of the heat storage medium by heat exchange should be stabilized within a certain range so that the dendritic ice can be easily separated and formed. According to HN Fletcher, ice crystals typically formed when the temperature of subcooled water is usually above -2.5 ° C become plate-like ices with dendritic crystal structure, and below -2.5 ° C are acicular or granular ice crystals. Park Ki-won, Heat Transfer in Low Temperature Environments and Its Applications, Taehoon Publishing Co. (2001) P83). To this end, there must be a mechanism in the heat storage medium that can prevent the increase of a certain amount of flow energy and supercooling. In addition, it is necessary to use a freezing inhibitor or the like so that the produced ice is not granulated by recrystallization. The whip rod method rotates the metal rod at high speed so that the inner surface of the tube and the rod form a thin film of thermal storage medium and flow down while destroying it. The screw scraper is also scraped and dislodged continuously in a similar manner. Ice-making work is done.

Secondly, the ice sludge produced should be sent out of the heat pipe and discharged outside the ice maker. Transfers out of the heat pipes can be easily taken out of the heat pipes by gravity or by pump heads. In the whip rod type, it is caused to flow down by gravity, and in the vibrating type and the screw scraper type, the heat storage medium is forcibly pushed by the pump of the pump in front of the ice maker, and the slurry is conveyed together, especially in the screw scraper type. By the rotation of the heat pipe is perfectly sent out. However, considerable research is required to discharge the mixture of ice slurry and aqueous solution transferred from the heat pipe to the lower discharge chamber out of the ice maker. If the ice maker is placed on top of the heat storage tank and dropped by gravity directly from the heat pipe to the heat storage tank, it is simply processed, but the lower structure of the ice maker must be specially designed to transfer the slurry ice produced in the ice maker to the pump due to the limitation of the installation space. . Slurry ice has a specific gravity smaller than the heat storage medium, so that it floats and separated under a certain flow rate. In this case, the blockage is caused by accumulation, so the structure must be special.

The third problem is to minimize the size of the ice maker by improving the heat transfer efficiency. The single tube ice maker has not been supplied despite the reliability of operation because of the lack of heat transfer area and no further increase in heat transfer efficiency. Unlike ordinary heat exchangers, slurry ice ice makers cannot have a logarithmic mean temperature difference (= temperature gradient) between the heat storage medium and the primary refrigerant above a certain range. If it is out of a certain range, the stability of operation due to subcooling on the heat transfer surface of the heat storage medium becomes a problem. In addition, the primary refrigerant side is out of the nuclear boiling heat transfer region. Therefore, a temperature gradient cannot be enlarged compared with a general heat exchanger. As a result, the primary refrigerant side heat transfer coefficient and the heat storage medium side heat transfer coefficient should be maximized. For this purpose, a double tube is used on the primary refrigerant side (see US Pat. No. 5,768,894), or a surface-treated heat transfer tube is used. On the heat storage medium side, which has a high heat transfer coefficient, the heat transfer rate is usually higher than that of a general heat transfer tube by scraping. to be.

The fourth task is to provide stable and efficient power for scraping and flow required for ice making. The whip rod type transmits the power by the swinging mechanism, so the power loss is small, the power can be transmitted even when the partial crystal grows on the heating surface, and the operation is carried out in the hollow state, which prevents the freezing of the ice maker. The load scraper type has a problem that the load is concentrated and the screw scraper type has a relatively simple and stable power transmission structure by the continuous power transmission by the plastic gear, but the gear tooth surface is directly exposed to the heat storage medium, and the tooth surface due to the inflow of foreign substances When damaged, there is a disadvantage that the whole ice maker freezes, and the vibration type has not been verified yet, but there is a possibility that the problem due to the complexity of the structure and the damage caused by the vibration energy of the connection portion between the vibration plate and the vibration member.

Two representative methods of the evaporative plate multi-slurry slurry ice maker are described in detail. This ice machine usually uses a shell tube type heat exchanger. A multi-tube ice maker includes a plurality of heat transfer tubes to which a heat storage medium is supplied. The refrigerant evaporates from the outside of the heat transfer tube while depriving the heat inside the heat transfer tube, and the heat storage medium inside the heat transfer tube is partially converted into slurry ice, and the produced slurry ice is discharged from the ice maker and stored in the heat storage tank. At this time, the scraping is continuously scraped to prevent the ice from sticking to the inside of the heat pipe, and as described above, the scraping method is a whip rod method and a screw scraper method. The whip rod method rotates the metal rod at a high speed inside the heat pipe to form a thin film of heat storage medium, which causes the slurry ice and the heat storage medium to flow down. The screw scraper type is scraped off by rotating a screw-type scraper made of plastic inside the heat pipe.

The whip rod method has good heat transfer efficiency due to the generation and disappearance of a film of a very thin heat storage medium formed between the rod and the heat pipe, but cannot carry slurry ice in a desired direction. Therefore, slurry ice is made to flow down by gravity. In addition, in the whip rod method, power is transmitted to the rod by the swinging movement mechanism, so the power loss is small, and even if partial ice crystals grow on the heat transfer surface, power can be transmitted and the hollow state of the ice maker is prevented by operating in the hollow state. There is an advantage, but there is a problem that the load is concentrated on the power transmission contact of the turning movement.

The screw scraper method can eliminate the supercooling and transfer the slurry ice in the desired direction, but the heat transfer efficiency is lower than that of the whip rod method. In addition, the screw scraper method has a relatively simple and stable power transmission structure by the continuous power transmission by the plastic gear, but the gear tooth surface is directly exposed to the heat storage medium, so that the entire ice maker freezes when the tooth surface is damaged by the inflow of foreign substances.

It is an object of the present invention to provide a slurry ice ice maker in which the heat transfer efficiency is further improved and the slurry particles are well separated at the heat transfer surface. It is another object of the present invention to provide a slurry ice ice maker in which the transport and discharge of the resulting slurry ice is made stable. Still another object of the present invention is to provide a slurry ice ice maker in which power transmission is stable. Still another object of the present invention is to provide a structure capable of minimizing the size of an ice maker.

According to one aspect of the invention, the inlet chamber is provided with an inlet for the heat storage medium is introduced,

A discharge chamber provided with a discharge port through which the heat storage medium is discharged;

A heat exchange chamber disposed between the inflow chamber and the discharge chamber, the inlet and the outlet of the refrigerant being provided, and a heat transfer tube extending from the inflow chamber to the discharge chamber to form a passage of the heat storage medium;

A scraper inserted into the heat transfer tube and provided with a spiral blade along an outer circumferential surface thereof;

Including a drive device for rotating the scraper,

One side of both sides of the blade (upstream in the movement of the heat storage medium) is a plane inclined in the direction of movement of the heat storage medium toward the end, and the other side (downstream in the movement of the heat storage medium) is a convex curved surface. Ice makers are provided.

The blade of the scraper may have a plurality of strings.

The inflow chamber may be positioned below the heat exchange chamber, and the discharge chamber may be positioned above the heat exchange chamber, and may have an inclined plate inclined such that an upper surface of the discharge chamber is inclined upward toward the discharge opening.

The heat exchange chamber includes two or more heat transfer tubes divided into one unit cell, a cell separation wall provided with a plurality of unit cells, and a refrigerant distribution plate provided with a plurality of passage holes for equally supplying the introduced refrigerant to each cell. Can be.

Each cell houses a heat transfer tube positioned at the center and a plurality of heat transfer tubes disposed on the circumference of the heat transfer tube, and the rotational force is transmitted from the scraper side provided at the center heat transfer tube toward the scraper provided at the surrounding heat transfer tube. A power transmission device may be provided between the scrapers.

According to another aspect of the present invention, there is provided a heat exchange chamber having an inlet and an outlet of a coolant, forming a passage of a heat storage medium for heat exchange with the coolant, and having a heat transfer tube extending vertically;

An inlet chamber located at a lower portion of the heat exchange chamber and connected to the heat exchanger tube and having an inlet through which a heat storage medium is introduced;

A discharge chamber located at an upper portion of the heat exchange chamber and connected to the heat transfer tube and provided with an outlet for discharging the heat storage medium;

A scraper inserted into the heat pipe and provided with a spiral blade along an outer circumferential surface of the heat storage medium to move upward;

Including a drive device for rotating the scraper,

A slurry ice ice maker having an inclined plate is inclined such that an upper surface of the discharge chamber is inclined upward toward the discharge opening.

The inclined plate may be inclined upwardly from one side of the discharge chamber toward the opposite side where the discharge port is provided, or may be inclined upward in the radial direction from the center of the discharge chamber.

The inflow chamber may be provided with a heat storage medium distribution plate having a plurality of passage holes for supplying heat storage medium to the heat transfer pipe evenly.

One side (upstream side in the movement of the heat storage medium) of both surfaces of the blade may be a plane inclined in the movement direction of the heat storage medium toward the end, and the other side (downstream in the movement of the heat storage medium) may be a convex curved surface. .

A power transmission unit provided with a power transmission device for driving the scraper is provided above the discharge chamber, and the heat transfer medium may be supplied to the power transmission unit, and the heat storage medium supplied to the power transfer unit may be a particulate material. Can be filtered.

According to another aspect of the invention,

An inlet chamber provided with an inlet through which heat storage medium is introduced,

A discharge chamber provided with a discharge port through which the heat storage medium is discharged;

Located between the inlet chamber and the discharge chamber, the inlet and outlet of the refrigerant is provided, and includes a heat exchange chamber is provided with a plurality of heat pipes to form a passage between the inlet chamber and the discharge chamber of the heat storage medium for heat exchange with the refrigerant,

The heat exchange chamber includes two or more heat transfer tubes divided into one unit cell, a cell separation wall provided with a plurality of unit cells, and a refrigerant distribution plate provided with a plurality of passage holes for equally supplying the introduced refrigerant to each cell. A slurry ice ice maker is provided.

It may include a scraper inserted into the heat pipe and provided with a spiral blade along an outer circumferential surface, and a driving device for rotating the scraper.

Each cell houses one heat transfer tube located at the center and a plurality of heat transfer tubes disposed on the circumference around the heat transfer tube, and the rotational force is transmitted from the scraper side provided at the heat transfer tube at the center to a scraper group provided at the surrounding heat transfer tube. A power transmission device may be provided between these scrapers if possible.

One side (upstream side in the movement of the heat storage medium) of both surfaces of the blade may be a plane inclined in the movement direction of the heat storage medium and the other side (downstream in the movement of the heat storage medium) may be a convex curved surface.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 is a block diagram of a system using a water cooling condensation system as an ice heat storage cooling system equipped with an ice maker according to an embodiment of the present invention. Referring to FIG. 1, the ice heat storage cooling system includes a cooling tower 2, a compressor 1, an ice maker 10, a heat storage tank 5, and a heat exchanger 9. The cooling tower 2 is cooled again so that the cooling water used in the compressor 1 and returned can be used again. The cooled cooling water is supplied to the compressor 1 again by the pump 4. The compressor 1 compresses the refrigerant gas returned from the ice maker 10 to high temperature and high pressure. The refrigerant gas compressed to high temperature and high pressure is discharged from the compressor 1 after condensation by the cooling water supplied from the cooling tower 2. The refrigerant liquid discharged from the compressor (1) flows into the ice maker (10) via the expansion valve (3). The refrigerant liquid introduced into the ice maker 10 returns to the compressor 1 after being evaporated.

The ice maker 10 discharges a portion of the heat storage medium introduced by using a refrigerant into slurry ice. The heat storage medium discharged from the ice maker 10 is stored in the heat storage tank 5. The heat storage medium stored in the heat storage tank 5 is transferred to the heat exchanger 9 by the circulation pump 6. The amount of flow of the heat storage medium is controlled by the three-way valve (7) for adjusting the flow rate in accordance with the temperature conditions on the load side, and some of the heat passes through the bypass line (7a) without passing through the heat exchanger (9). The heat storage medium passing through the heat exchanger (9) and the heat storage medium passing through the bypass line (7a) are combined through the three-way valve (7) to return to the heat storage tank or, in some cases, some or most of the ice making machine (10) It is introduced downward to lower the temperature of the heat storage medium or phase change to partial slurry ice and return to the heat storage tank (5). Meanwhile, the heat storage medium enters the ice maker 10 under the ice maker 10 through the foreign matter removing device 11 such as a filter. Some of them enter the power train chamber 82, cool, and then merge with the heat storage medium discharged from the discharge port 62 (see Fig. 2). The heat storage medium returned to the heat storage tank 5 is cooled while passing through the slurry ice and ice layers floating on the heat storage tank 5 while descending to the bottom of the heat storage tank to continuously enter the pump 6 to form a cooling cycle. .

2 to 8 are views of the ice maker 10 shown in FIG. 2 and 3, the ice maker 10 includes a heat exchanger 20, a heat storage medium inlet 40, a heat storage medium discharge unit 60, and a driving unit 80. The heat storage medium inlet 40 is located below the heat exchange unit 20, and the heat storage medium discharge unit 60 is located above the heat exchange unit 40. The driving unit 80 is located above the heat storage medium discharge unit 60.

The heat exchange part 20 has a cylindrical shell 12. The cylindrical shell 12 has side walls and upper / lower support plates 22 and 24 for closing the open upper and lower portions of the shell 12 and supporting the heat transfer tubes 15 described later. The heat exchange chamber 18 provided by the side wall and the upper / lower support plates 22 and 24 is formed. The heat exchange chamber 18 is provided with a plurality of heat transfer tubes 15 that are up and down, upper and lower refrigerant distribution plates 14 and 17, and a cell separation wall 30. A coolant inlet 99 through which coolant liquid flows is provided in a lower portion of the shell 12 (exactly between the lower support plate 24 and the lower coolant distribution plate 16). Although not shown in this section, a coolant inlet and an auxiliary inlet and outlet returned from the low pressure liquid separator may be further provided. At the upper portion of the shell 12 (exactly between the upper support plate 22 and the upper refrigerant distribution plate 14), a refrigerant gas is discharged and a refrigerant outlet 98 is connected to a low pressure liquid separator (not shown).

The heat transfer tube 15 is a circular tube shape made of a metal having excellent thermal conductivity, and the upper and lower portions thereof are coupled to the upper / lower support plates 22 and 24 by expansion (or by a joining method such as welding). The heat storage medium inlet 40 and the heat storage medium discharge unit 60 communicate with each other by the heat transfer tube 15. In the heat transfer pipe 15, the full-curve post-slope scrapers 16 and 16a described later are inserted and accommodated. The rotation of the scrapers 16 and 16a separates the slurry ice particles from the heat transfer pipe wall and transfers the heat storage medium from the inlet chamber 43 to the discharge chamber 61 through the heat transfer tube 15.

The upper refrigerant distribution plate 14 and the lower refrigerant distribution plate 17 are provided to be slightly spaced apart from the upper support plate 22 and the lower support plate 24, respectively. The upper and lower refrigerant distribution plates 14 and 17 are provided with a plurality of passage holes 141 and 171. Through the passage holes 141 and 171 of the upper and lower coolant distribution plates 14 and 17, the coolant is uniformly distributed and supplied to each cell 31 described later.

Although not shown in FIG. 2, as shown in FIG. 3, the plurality of heat transfer tubes 15 extend between the upper refrigerant distribution plate 14 and the lower refrigerant distribution plate 17. Is divided into a plurality of cells 31 (7 in this embodiment) adjacent to each other in the same shape (in the present embodiment, a regular hexagonal shape). Each cell 31 is provided with a plurality of heat transfer tubes (7 in the present embodiment), and a plurality of heat transfer tubes are arranged around the circumference with respect to one heat transfer tube located at the center. Referring to FIG. 3, a plurality of passage holes 141 and 171 of the upper and lower refrigerant distribution plates 14 and 17 are arranged in equal numbers (three in this embodiment) for each cell 31. Therefore, the coolant is uniformly distributed and supplied to each cell 31. With the above configuration, it is possible to solve the deflection phenomenon of the refrigerant, which is a disadvantage of the conventional vertical heat exchanger, to increase the overall heat transfer effect. In the above embodiment, the shell 12 has been described as having seven unit cells 31. However, the present invention is not limited thereto. The number of cells 31 can be varied, for example, 19 cells can be formed as shown in FIG.

Referring back to FIG. 2, the heat storage medium inlet 40 is provided under the heat exchange unit 20. The heat storage medium inlet 40 includes an inlet chamber 43 provided by a lower support plate 24 and a case 41 coupled to the lower support plate 24. The inflow chamber 43 communicates with the heat transfer pipe 15 fixed to the lower support plate 24. A lower portion of the case 41 is provided with an inlet 42 through which the heat storage medium flows. The inlet chamber 43 is provided with a heat storage medium distribution plate 44 at a position higher than the inlet 42. The heat storage medium distribution plate 44 is provided with a plurality of passage holes 441 to equalize the flow of the heat storage medium. The case 41 is preferably detachably coupled to the lower support plate 24.

Referring to FIG. 2, the cylindrical upper case 50 is coupled to the upper support plate 22, and the upper plate 79 is coupled to the upper case 50. An inner space formed by the upper case 50, the upper support plate 22, and the upper plate 79 is provided with a support plate 68 provided horizontally. The upper part is the driving unit 80 and the lower part is the discharge unit 60 based on the support plate 68. The discharge part 60 is provided with an inclined plate 64 dividing the space diagonally. The space under the inclined plate 64 is the discharge chamber 61. A discharge port 62 is provided at an uppermost side of the inclined plate 64 above the side wall of the discharge chamber 61. The heat storage medium containing the slurry ice transferred to the discharge chamber 61 through the heat transfer pipe 15 is guided by the inclined plate 64 and discharged through the discharge port 62, so that they are not separated from each other and stably discharged. The inclined plate 64 has a hole so that the scraper 16 extends through the inclined plate hole to the drive unit 80. The inclined plate 64 has a gap or a hole so that a part of the heat storage medium may move to the upper portion of the inclined plate 64. The heat storage medium flows into the power train chamber 82 through a passage 681 provided in the bracing plate 68 to cool and lubricate the power train therein. The passage 681 is preferably equipped with a filter for filtering foreign matter from the heat storage medium. In Fig. 5 another embodiment of the outlet is shown. Referring to Figure 5, the inclined plate 64a has an inclined shape so as to rise upward in both directions from the center. At this time, more discharge ports 62a may be provided in the discharge chamber 61a. In such a configuration, the height of the discharge chamber can be lowered.

Referring to FIG. 2, the driving unit 80 is provided on the discharge unit 60. The driving unit 80 includes a driving device 90 provided on the upper plate 79, and a power transmission device for transmitting power generated by the driving device 90. The drive unit 80 includes a power train compartment 82 in a space between the top plate 79 and the bracing plate 68 to accommodate the power train. The driving device 90 includes a rotation drive motor and a speed reduction device for adjusting the rotation speed. The rotating shaft 92 of the driving device 90 is sealed by the shaft airtight holding device (also referred to as the shaft rod device) 91 and inserted into the power train chamber 82. The power train compartment 82 is provided with a plurality of gears to form a power train for transmitting rotational force. The primary drive gear 95 is mounted on the rotation shaft 92 of the drive device 90. The primary driven gear 70 is attached to the rotating shaft of the scraper 16a located at the center of each cell 31 of the heat exchange chamber 18. The primary driven gear 70 is engaged with the primary drive gear 95 to receive rotational force. The secondary drive gear 72 is mounted together on the rotation shaft of the scraper 16a provided with the primary driven gear 70. Secondary driven gears 74 are provided on the rotation axis of the scraper 16 around the scraper 16a located in the center of each cell 31. The secondary driven gear 74 is engaged with the secondary drive gear 72 to receive the rotational force. By this structure, each scraper 16, 16a is rotated by the drive device 90 at a similar speed. Although not shown in detail in this embodiment, the secondary drive gear is somewhat larger in diameter than the secondary driven gear. Therefore, the center scraper 16a rotates somewhat faster than the surrounding scraper 16. This is to prevent unnecessary interference between the scraper gears. It will be understood by those skilled in the art that in this power transmission structure, the rotation of the central scraper and the surrounding scraper are in opposite directions, so that the direction in which the blade string twists spirally is reversed. In order to smoothly rotate the gear shaft (ie, the driving shaft or the scraper), the support plate 68 is provided with a shaft support device such as a ball bearing.

On the other hand, a discharge port 78 is provided on the side of the power train compartment (also called a gear chamber) 82. The heat storage medium for cooling and lubrication introduced into the passage 681 of the upper plate 68 is discharged to the outside through the discharge port 78. The discharged heat storage medium joins the heat output medium discharged from the discharge chamber 61. The heat storage medium for the cooling and lubrication heat storage medium is introduced into the power transmission device chamber 82 through the passage 681 provided in the upper plate 68. A filter (not shown) mounted in the passage 681 removes foreign matter (mainly particulate matter) that may affect the operation of the gear before being introduced.

In this embodiment, the driving unit is located at the top of the ice maker 10, but the present invention is not limited thereto. It will be understood by those skilled in the art that alternatively, it may be located at the bottom of the ice maker 10.

2, 6, and 7, all of the scrapers in the ice maker are the same, and the scraper 16 forms a stem 161 corresponding to a central axis and an outer circumferential surface of the stem 161 at a predetermined inclination. And a blade 162 formed accordingly. An inner surface of the stem 161 may be inserted with a metal insert to reinforce strength and straightness. The upper surface of the blade 162 is a convex curved surface with a constant radius of curvature R and the lower surface is an inclined plane with a constant angle θ (referred to herein as “post-warp tilt”). Although it may vary depending on the size or structure of the ice maker, the scraper 16 may be formed of a plastic resin (for example, PE, POM, etc.), but any material may be used as long as it has cold resistance and water resistance. In addition, it is preferable that the radius of curvature R is approximately 6 to 15 mm and the angle θ is approximately 10 to 20 degrees. The end of the blade 162 is a straight line and a straight line meets the outer diameter is kept constant so that the gap (g) with the inside of the heat pipe 15 is constant. The blade 162 preferably has a plurality of strings. In this embodiment shown in Figs. 2, 6 and 7, it is a three-row blade. Therefore, low speed operation is possible because the surface is scratched by the number of lines (three times in the case of three-row blades) in one revolution.

6, 7, and 8, the heat storage medium moves into the heat pipe with the rotation of the scraper 16 in the inflow chamber 40, that is, into the space 163 formed by the stem 161 and the side of the blade 162. It flows in and moves the heat pipe. At this time, there is a difference between the rotational speed of the scraper and the moving speed of the heat storage medium. Referring to Fig. 8, due to this difference, the heat storage medium moves in the direction of the arrow as shown in Fig. 8 through the thin gap g between the end of the blade 162 and the heat pipe 15, and the gap g is formed in the gap g. While extinguishing the thin film, the heat storage medium is pulled out and mixed, eliminating heat transfer promotion and supercooling, resulting in stable ice making. This state is well illustrated in FIG. As described above, the pre-slope post-slope type scraper configuration of the present invention enables high transfer efficiency, which is an advantage of the conventional whip rod method, and stable transfer and operation noise reduction, which is an advantage of the scraper method.

Now, the operation of the ice maker will be described in detail with reference to FIGS. 2 and 3.

The refrigerant liquid enters into the heat exchange chamber through the refrigerant liquid inlet 99 provided in the lower portion of the heat exchange chamber 18. The refrigerant introduced into the heat exchange chamber 18 is equally distributed and supplied to each unit cell 31 through the passage hole 171 of the lower refrigerant distribution plate 17. As the refrigerant liquid supplied to each cell 31 rises, it takes away heat energy from the heat storage medium inside the heat transfer pipe 15 and evaporates, and the upper portion of the heat exchange chamber 18 through the passage hole 141 of the upper refrigerant liquid distribution plate 14. Exit to The refrigerant gas on the heat exchange chamber 18 is discharged toward the compressor (1 in FIG. 1) through the refrigerant discharge port 98.

The heat storage medium enters the inlet chamber 43 through the inlet 42 of the inlet portion 40 provided below the ice maker 10. The heat storage medium entering the inflow chamber 43 rises up evenly through the passage hole 441 formed in the heat storage medium distribution plate 44. The heat storage medium which has been raised on the heat storage medium distribution plate 44 is raised upward along the heat transfer pipe 15 by the action of the scraper 16 which is rotated by the driving device 90. The heat storage medium moves up along the heat transfer pipe 15, and loses heat to the refrigerant in the heat exchange chamber 18, and part of the heat storage medium changes into slurry ice. The heat storage medium containing the slurry ice flows into the discharge chamber 61 through the heat transfer pipe 15 and is eventually discharged through the discharge port 62 and is transferred to the heat storage tank (5 in FIG. 1) and stored. At this time, some of the heat storage medium of the discharge chamber 61 rises over the inclined plate 64 through the hole of the inclined plate 64. The heat storage medium again enters the power train chamber 82 through the passage 681 of the upper plate 68, cools and lubricates, and then exits through the outlet 78. The stored heat storage medium joins the heat storage medium discharged from the discharge chamber 61. On the other hand, a filter is attached to the passage 681 of the upper plate 68 and the outlet 78 of the power transmission device chamber 82 to mix with the heat storage medium to filter foreign matter that may affect the operation of the gear.

When using the slurry ice ice maker according to the present invention, it is possible to obtain the effect of the high heat transfer efficiency and advantages of the conventional whip rod method and the stable transfer and noise reduction advantages of the screw scraper method. In addition, since the flow of the refrigerant is made even, high heat transfer efficiency can be obtained. In addition, by selecting the upstream flow of the heat storage medium, the accumulation and clogging caused by the separation due to the specific gravity difference of the slurry is minimized, thereby operating more stably. In addition, load distribution, foreign matter inflow prevention, etc., have improved durability and more stable driving characteristics of the drive unit.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited thereto. Those skilled in the art will appreciate that modifications and variations can be made without departing from the spirit and scope of the present invention and that such modifications and variations also fall within the present invention.

1 is a block diagram of an ice heat storage cooling system equipped with an ice maker according to an embodiment of the present invention.

2 is a partial cross-sectional view showing the interior of the ice maker of FIG.

3 is a cross-sectional view showing the interior of the heat exchanger of the ice maker of FIG.

4 is a cross-sectional view showing the interior of the heat exchanger as another embodiment of the ice maker of FIG.

FIG. 5 is a sectional view showing another embodiment of the discharge chamber of the ice maker of FIG. 2. FIG.

6 is a shape diagram of the scraper of FIG.

FIG. 7 is an enlarged longitudinal sectional view of the blade of the scraper of FIG. 6; FIG.

Fig. 8 is a cross sectional view of the scraper of Fig. 6

<Description of the symbols for the main parts of the drawings>

10 ice maker 15 heat transfer tube

16, 16a: scraper 18: heat exchange chamber

43: heat storage medium inlet chamber 61: heat storage medium discharge chamber

82: power transmission chamber 90: drive

162: Blade

Claims (15)

An inlet chamber in which an inlet for the heat storage medium is introduced; A discharge chamber provided with a discharge port through which the heat storage medium is discharged; A heat exchange chamber disposed between the inflow chamber and the discharge chamber, the inlet and the outlet of the refrigerant being provided, and a heat transfer tube extending from the inflow chamber to the discharge chamber to form a passage of the heat storage medium; A scraper inserted into the heat transfer tube and provided with a spiral blade along an outer circumferential surface thereof; Including a drive device for rotating the scraper, One side of both sides of the blade (upstream in the movement of the heat storage medium) is a plane inclined in the direction of movement of the heat storage medium toward the end, and the other side (downstream in the movement of the heat storage medium) is a convex curved surface. Ice maker. 2. The slurry ice ice maker of claim 1 wherein the blades of the scraper have a plurality of strings. According to claim 1 or 2, wherein the inlet chamber is located under the heat exchange chamber, the discharge chamber is located above the heat exchange chamber, the inclined plate inclined so that the upper surface of the discharge chamber is inclined upward toward the discharge port Slurry ice ice machine provided. According to claim 1 or 2, wherein the heat exchange chamber partitions two or more heat pipes into one unit cell, the cell separation wall is provided so that a plurality of the unit cell, and the supplied refrigerant to equally supply each cell Slurry ice ice maker is provided with a refrigerant distribution plate provided with a plurality of passage holes. The scraper according to claim 4, wherein each of the cells includes a heat transfer tube positioned at a central portion and a plurality of heat transfer tubes disposed on a circumference around the heat transfer tube, and a scraper provided at a surrounding heat transfer tube on a scraper side provided in the heat transfer tube at the center. Slurry ice ice maker provided with a power transmission device between these scrapers so that rotational force is transmitted toward them. A heat exchange chamber provided with an inlet and an outlet of the refrigerant, and having a heat transfer tube extending upward and downward, forming a passage of the heat storage medium for exchanging heat with the refrigerant; An inlet chamber located at a lower portion of the heat exchange chamber and connected to the heat exchanger tube and having an inlet through which a heat storage medium is introduced; A discharge chamber located at an upper portion of the heat exchange chamber and connected to the heat transfer tube and provided with an outlet for discharging the heat storage medium; A scraper inserted into the heat pipe and provided with a spiral blade along an outer circumferential surface of the heat storage medium to move upward; Including a drive device for rotating the scraper, And an inclined plate inclined such that an upper surface of the discharge chamber is inclined upward toward the discharge opening. The slurry ice maker of claim 6, wherein the inclined plate is inclined upwardly from one side of the discharge chamber toward the opposite side where the discharge port is provided. 7. The slurry ice ice maker of claim 6, wherein the inclined plate is inclined upward in a radial direction from the center of the discharge chamber. The method according to any one of claims 6 to 8, wherein one side (upstream side in the movement of the heat storage medium) of both surfaces of the blade is a plane inclined toward the end of the heat storage medium and the other surface ( Downstream in the movement of the heat storage medium) is a slurry ice ice maker is a convex curved surface. The power transmission device according to any one of claims 6 to 8, wherein a power transmission device provided with a power transmission device for driving the scraper is provided above the discharge chamber, and the power transmission device chamber for cooling and lubrication from the discharge chamber. Slurry ice ice maker supplied with heat storage medium. 11. The slurry ice ice maker of claim 10, wherein the heat storage medium supplied to the power transmission chamber is filtered out of foreign matter. An inlet chamber provided with an inlet through which heat storage medium is introduced, A discharge chamber provided with a discharge port through which the heat storage medium is discharged; A heat exchange chamber disposed between the inflow chamber and the discharge chamber, provided with an inlet and an outlet of the refrigerant, and having a plurality of heat transfer tubes forming a passage between the inlet chamber and the discharge chamber of the heat storage medium for heat exchange with the refrigerant; The heat exchange chamber is provided with a cell partition wall that divides two or more heat pipes into one unit cell and includes a plurality of unit cells, and a refrigerant distribution plate having a plurality of passage holes for supplying the introduced refrigerant to each cell evenly. Slurry ice ice machine. 13. The slurry ice ice maker according to claim 12, further comprising a scraper inserted into the heat pipe and provided with a spiral blade along an outer circumferential surface thereof, and a driving device to rotate the scraper. 13. The scraper according to claim 12, wherein each of the cells includes one heat exchanger tube positioned at a central portion and a plurality of heat transfer tubes disposed on a circumference around the heat transfer tube, and a scraper provided at a surrounding heat transfer tube on a scraper side provided in the heat transfer tube of the central portion. Slurry ice ice maker provided with a power transmission device between these scrapers so that rotational force is transmitted toward them. 15. The method according to claim 13 or 14, wherein one side (upstream side in the movement of the heat storage medium) of both surfaces of the blade is a plane inclined in the movement direction of the heat storage medium and the other side (downstream side in the movement of the heat storage medium). ) Is a slurry ice ice maker which is a convex curved surface.