KR20040059003A - Ice slurry generator using supersonic waves - Google Patents

Abstract

PURPOSE: A slurry ice making machine by using supersonic waves is provided to improve heat-transfer efficiency, to separate slurry particles well on a heat transferring surface, to stably transfer and discharge the generated slurry ice, and to minimize the size of the ice making machine. CONSTITUTION: A slurry ice making machine(10) by using supersonic waves is composed of an inflow chamber(30) mounted with an inlet port(31) through which a heat storage medium flows; a discharge chamber(40) installed with a discharge port(42) through which the heat storage medium is discharged; a heat exchanging chamber positioned between the inflow and discharge chambers, formed with a refrigerant inlet(24) and a refrigerant outlet(25), and mounted with a heat transfer pipe(22) extended between the inflow and discharge chambers from the inflow chamber to form a passage for the heat storage medium; and a supersonic wave supply device installed to the inflow chamber.

Description

Slurry ice ice maker using ultrasonic wave ICE SLURRY GENERATOR USING SUPERSONIC WAVES}

The present invention relates to an ice maker used in a dynamic ice heat storage system, and to a slurry ice ice maker of a shell-type shell tube type.

Recently, the focus of attention on slurry ice is that slurry ice has many advantages such as high efficiency and thawing speed than the existing ice storage method, and it can be used as a high density cold heat transportation means. Here, ice makers that make slurry ice economically and reliably are the core equipment, and various types of ice makers are being researched and developed around the world. Evaporative plate type, supercooled water type, refrigerant integrated contact type, direct freezing type of water by vacuum, etc. are being researched or developed, and recently slippery type and fluidized bed type are under research and development. Among them, the evaporation plate type and the subcooled water type have been developed and are widely distributed, but until now, the most reliable method is recognized as the evaporation plate type. The evaporation plate type is largely divided into single and multi-pipe type, and the 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. 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. Aggregation blockages reduce the reliability of slurry ice ice makers, and the high cost of structural complexity has severely limited general dissemination.

There are three major problems to be technically solved in the multi-tube ice maker for the stable production of slurry ice.

Firstly, the ice maker should be continuously removed from the heat transfer surface to prevent the phase change of slurry particles from sticking to the heat transfer surface. The supercooling of the heat storage medium by heat exchange should be stabilized within a certain range so that the ice generated on the fine surface of the heat transfer surface becomes smooth ice (Frazil Ice) so that it can be easily released. There should be a mechanism to prevent the increase of supercooling while supplying energy.

In addition, the ice should not be hardened by recrystallization, and there should be a device that can handle the formation of hard ice on the heat transfer surface due to abnormal conditions. Conventional whip rods rotate metal rods at high speeds so that the inner surface of the tube and the rods form a thin layer of heat storage medium and flow down while destroying them. The screw scraper also scrapes and breaks in a similar manner in a continuous manner. It is trying to achieve stable ice making by the mechanism.

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 sent out of the heat pipes by gravity or by pump heads. In the whip rod type, the flow is caused to flow down by gravity. In 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 transferred together and sent to the outside of the heat pipe by the rotation of the screw. In order to discharge the mixed mixture of ice slurry and aqueous solution transferred from the heat transfer tube to the ice making machine out of the ice maker, the problem of clogging caused by the two-phase separation caused by the flow rate decrease in the discharge chamber is appropriately determined by gravity or buoyancy, flow rate and discharge chamber shape. It should be solved by utilizing.

Of course, this problem is solved simply by dropping the ice maker on top of the heat storage tank and dropping it directly from the heat pipe to the heat storage tank by gravity, but it is necessary to pump slurry ice produced in the ice maker to constrain the installation space or circulate the closed system. If there is a major issue.

Slurry ice has a specific gravity smaller than the heat storage medium, so that it floats under a certain flow rate. In this case, the blockage occurs due to accumulation, and when it flows down by gravity, it is difficult to discharge when the viscosity increases due to abnormal heat exchange conditions.

The third problem is to minimize the size of ice makers 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 temperature gradient cannot be increased because the stability of the operation due to excessive supercooling of the heat storage medium becomes a problem. In addition, if the heat transfer area is large, the power to scrape the heat transfer surface must be increased. Therefore, the heat transfer efficiency is an important factor that determines the economics of the ice maker. To solve this problem, the heat transfer coefficient on the refrigerant side and the heat transfer coefficient on the heat storage medium must be maximized.

To this end, the refrigerant flow on the refrigerant side is improved or the processing heat pipe is used, and the heat storage medium side is increasing the heat transfer coefficient by various scrapings. Considered from these standards, the whip rod method has good heat transfer efficiency as the film of thin heat storage medium formed between the rod and the heat transfer tube is rapidly disappeared, but cannot be transported in the desired direction because the produced slurry ice must flow down by gravity. . Therefore, precise devices and control mechanisms are required for the discharge. In addition, in the whip rod method, power is transmitted to the rod by the swing motion mechanism, so the power loss is small, and even if the hard crystal grows partially on the heat transfer surface, the power can be transmitted and the operation is carried out in the hollow state, which freezes the ice maker. There is a delay, 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 due to continuous power transmission by plastic gears, but the gear tooth surface is directly exposed to the heat storage medium, and the entire ice maker stops and freezes when the tooth surface is damaged by the inflow of foreign substances. In addition, the blockage caused by irregular accumulation in the lower discharge chamber should be prevented by precise control.

In both methods, the inner diameter of the unit heat pipe must be increased by having a scraping mechanism inside the heat pipe, so that despite the high heat transfer coefficient, the size of the heat transfer part is large, making the unit capacity of the ice maker difficult to increase.

The present invention has been made in consideration of the above-mentioned technical problems of the slurry ice ice maker, which can be solved by using supercooling, heat transfer promotion, and surface cleaning effects due to ultrasonic co-effects and jetstreaming.

It is therefore 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 from 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 structure capable of minimizing the size of an ice maker.

1 is a circulation system diagram of a refrigerant and a heat storage medium around a slurry ice ice making device in an ice making system according to an embodiment of the present invention.

FIG. 2 is a detailed view of a standing ice maker that may be used in the system shown in FIG.

3 is a circulation diagram when using brine in an ice making system according to another embodiment of the present invention.

4 is a view showing an example of a heat storage medium inlet chamber

10 ice maker 20 heat exchanger

21a: On support plate 21b: On support plate

22: heat pipe

23a, 23b: Refrigerant flow guide plate up and down

24: refrigerant inlet 25: refrigerant outlet

30: inlet chamber 31: inlet

32: distribution device 33: pressure sensor

40: discharge chamber 41: inclined plate

42 outlet 43 temperature sensor

44: flow switch 50: vibration unit

51: oscillator 52: diaphragm

53: vibrator 54: vibrator cover

60: low pressure receiver 61: expansion device

62: evaporation pressure control device 63: level sensor

70: freezer 71: bypass valve

73a: supply shutoff valve 73b: bypass valve

74: brine pump

The present invention relates to a novel process for producing ice slurry (fluidic ice) used in dynamic refrigerating systems and special cooling devices, and circulates a primary refrigerant (refrigerant) or a secondary refrigerant (brain) on the shell side of a shell tube heat exchanger, At the same time, the heat storage medium flows without blocking from the bottom to the top or horizontally inside the heat transfer tube, thereby partially changing the phase by heat exchange with the refrigerant outside the heat transfer tube (= shell side) to form an ice slurry. At this time, the force to attach to the wall surface of the heat transfer tube is below a certain level through a device that maintains the heat flow of the heat transfer surface below a certain level so that the heat storage medium does not adhere to the inside of the heat transfer tube while changing phase inside the heat transfer tube. If you supply more than this force to the heat storage medium in the form of ultrasonic vibration energy during the management, the slurry ice is continuously generated without adhering to the heat transfer surface, and the heat generated to prevent the ice particles separated from the heat transfer surface from sticking to the inner wall of the tube again. If the medium is transported above a certain flow rate, it can be stably discharged out of the tube. At this time, by using buoyancy due to the density difference of the ice particles or administering some freezing inhibitor or surfactant to the heat storage medium, more reliable results can be obtained. The ice slurry and the heat storage medium discharged from the tube are collected in a water chamber or water box located at the upper or side portion of the shell, which is discharged to an external pipe and supplied to the heat storage tank or the load side, and stored or directly used.

On the other hand, since many cavities and jet streams are generated in the heat storage medium by the ultrasonic waves directly or indirectly transmitted to the heat storage medium, heat transfer between the heat storage medium and the heat transfer pipe is promoted, and the vibration energy of the ultrasonic wave is transferred to the outside of the heat transfer pipe and transferred to the refrigerant side. By promoting the side heat transfer, the overall heat transfer coefficient is greatly increased, and the heat storage medium whose temperature is lowered below the freezing point is eliminated by the ultrasonic undercooling, so that the supercooling is eliminated, so that fine ice of fine particles is generated and the supercooling degree is increased. By keeping it stable and low, it makes stable ice making.

Ultrasonic waves have various characteristics and are widely used. Among the characteristics of the ultrasonic wave, the cavity effect in the fluid medium, the heat transfer promotion (1) by the generation of jet streams, the supercooling inhibiting effect during the solid phase change, the surface cleaning effect at different media interfaces, etc. Forms the basis that can be applied to.

By utilizing some of these characteristics, it is installed at the outlet of the ice slurry ice maker using the supercooling phenomenon of water, and is used as a device to solve the supercooling. In addition, although the effect of inhibiting adhesion by ultrasonic waves has been demonstrated in the research process (Note 2), there has been no use of ultrasonic vibration energy to prevent ice from attaching directly to ice makers.

There are a number of technical problems to be solved in order to continuously produce in ice slurry ice maker, but among them, there is a scraper-type ice making method that scrapes the heating surface continuously. It is very important to prevent the ice slurry produced on the heat transfer surface from sticking to the ice making device that is produced directly, and then to discharge the ice to the outside of the heat pipe and the ice maker to prevent the detached ice from sticking back to the heat transfer surface. .

In order to continuously form ice on the heat transfer surface, the adhesion inhibitory force of water molecules deprived of energy by the heat transfer to the heat transfer surface must be maintained throughout the heat transfer surface. To this end, the greater the heat flux, the greater the adhesion of ice (Note 3). Therefore, the heat flux of the heat transfer surface should be limited within a certain range, and materials such as critical surface tension of the heat transfer surface may be used, additives may be used, or microorganisms may be used. The adhesion should be minimized through

At the same time, it is required to limit the degree of supercooling at the time of phase change, so that the ice produced is kept in a smooth state with good peeling.

In addition, the heat transfer conditions of the entire heat transfer surface should be as uniform as possible. For this purpose, there must be sufficient flow amount in the heat storage medium, and a means for ensuring the flow is uniform is required.

In such a condition, when the ice separating the ice from the heat transfer surface is continuously maintained in a condition where the force greater than the adhesion force, the slurry ice can be stably obtained from the heat transfer surface.

The slurry ice ice making apparatus using ultrasonic waves of the present invention has several components for the stable ice making of the ice making process. First, it has a device for maintaining the heat flux of the heat transfer surface below a certain level.

1 is a schematic diagram of an ice making apparatus peripheral system when slurry ice is produced by heat exchange with a primary refrigerant, and FIG. 2 is a detailed view of the ice making apparatus. In FIG. 2, embedded parts (for example, parts indicated by 22, 23, and 53) are also shown by a solid line, but those skilled in the art can easily understand that these parts are embedded inside.

1 and 2, an aqueous solution (also called a heat storage medium) supplied from a heat storage tank or a load device is introduced into the ice maker 10 by a pump. It enters the inlet chamber 30 through the inlet pipe 31 of the ice maker, passes through a plurality of heat pipes 22 (only one illustrated in FIG. 2) to reach the discharge chamber 40 and discharges the discharge pipe 42. It is discharged through and transferred to heat storage tank or load side.

On the other hand, the high-pressure liquid refrigerant cooled by the compressor passes through the expansion device 61 to become a low-pressure liquid refrigerant to enter the lower shell side of the heat exchange unit 20 of the ice making device, and evaporate from the shell side where the low pressure is maintained. 22) By absorbing heat from the aqueous solution passing through the inside, the part of the aqueous solution is changed to make ice.

The liquid refrigerant entering the shell side is dispersed by the upper and lower refrigerant flow guide plates 23a and 23b installed for uniform distribution in the heat transfer part of the liquid refrigerant to maintain the heat transfer efficiency and heat is transferred from the heat transfer pipe. The refrigerant gas absorbed and evaporated and the liquid refrigerant and the oil which do not evaporate are mixed and introduced into the low pressure receiver 60 through the refrigerant outlet 25.

The refrigerant gas, liquid refrigerant and oil introduced into the low pressure receiver are separated into gas, liquid and oil by the speed difference in the low pressure receiver, and the liquid refrigerant and oil are supplied back to the shell through the refrigerant return port under the heat exchanger. The refrigerant gas is mixed with the refrigerant introduced through the expansion device 61, and the refrigerant gas is sucked into the compressor while repeating the process of evaporation and separation. A separate device (not shown) is also provided for recovering oil that does not evaporate at this time.

One of the features of the present embodiment is to stabilize the heat transfer condition through the supply of a full liquid refrigerant by using the low pressure receiver 60, and the evaporation temperature by maintaining the evaporation pressure in the evaporator at a constant level using the evaporation pressure control device 62 It should be stabilized so that heat flux does not exceed a certain range. Of course, a sufficient number of heat transfer tubes are provided to keep the heat flux low. In a more preferred case, when the compressor used in the refrigeration system is used as a model capable of volume control by suction pressure, optimal conditions can be formed.

3 is a schematic diagram of a system around an ice making apparatus when slurry ice is generated by heat exchange with a brine, which is a secondary refrigerant, as a system according to an exemplary embodiment of the present invention.

In this case, a device for maintaining the brine temperature is preferably installed in the brine production apparatus, that is, the refrigerator 70, rather than being installed on the ice maker side or in the piping system.Brines below a predetermined temperature are not supplied to the ice maker around the ice maker. If a device 73a, 73b or a brine of a certain temperature or less is supplied, a device 71 for maintaining a low temperature by mixing some high temperature brine is required, and FIG. 3 is a preferred embodiment in which such devices are configured. It is a schematic diagram of. The ice making apparatus 10 'used in the embodiment of FIG. 3 is almost similar to the apparatus shown in FIG. When using brine, a plurality of horizontal baffles are arranged in a zigzag form as a refrigerant flow guide plate.

4 is a detailed view of an inflow chamber 30 in which an ultrasonic vibrator unit 53 is attached. The heat storage medium (aqueous solution) introduced into the inlet chamber through the inlet 31 is sprayed to the inlet chamber through the distribution device 32 and is evenly distributed throughout the inlet chamber, and is connected to the inlet chamber through the lower support plate 21b. (22) Evenly divided into the lower part is supplied.

The vibrator unit 53 connected to the inflow chamber or installed in the inflow chamber is located in a space separated from the water chamber by the diaphragm 52, and the vibrator 53 is tightly coupled to the diaphragm 52 to transmit vibration. As the material of the diaphragm is a material having corrosion resistance to the heat storage medium, it is required that no damage caused by corrosion of the diaphragm occurs. The vibrator should be manufactured in a structure that is sealed by the diaphragm and the vibrator cover 54 so that moisture due to condensation or heat storage medium does not penetrate.

Secondly, the material of the heat transfer pipe 22 is made of a material having less adhesion of ice. Copper and vinyl chloride are known as materials with low adhesion to ice. Silicon and the like. In another case, a heat transfer tube with a surface coating can be used. In any case, the ice adhesion should be low during the heat transfer and there should be no breakage or deformation of the material by ultrasonic waves.

Thirdly, in the present invention, an additive of an organic or inorganic substance may be used in an aqueous solution to generate slurry ice while suppressing adhesion as much as possible even under relatively high heat flux. The role of additives in the process of producing slurry ice has not been revealed in detail, but it has been found that additives can be used to reduce the size of heat exchanger by increasing the temperature gradient of the heat exchanger during slurry ice formation. It has been found to delay the recrystallization of the slurry ice and to stabilize the ice making process by increasing the fluidity.

In the present invention, the same effect can be obtained by using an additive, and it is also possible to reduce the intensity of the ultrasonic wave by using the additive. Of course, it is possible to make ice without using additives, but in economic problems, it is possible to reduce the size of the equipment by using additives and to obtain a synergistic effect of operating efficiency when slurry ice is obtained through heat exchange with primary refrigerant (in case of FIG. 1). Can be.

Fourthly, in the present invention, ice is prevented from adhering to the heat transfer surface using ultrasonic waves. Ultrasound is known to have an effect of cleaning the interface cleanly when it passes through the boundary layer of different media, and it is used for a cleaning device, an anti-scale device, and the like by using this property. In addition, as described above, in the process of developing a slurry ice deicing device using subcooled water, there is an effect of preventing the ultrasonic waves from adhering to the wall.

In the present invention, the ultrasonic vibrator is installed in the inlet chamber 30 or installed so as to be connected to the inlet chamber 30 to supply the vibration energy to the aqueous solution to be introduced, so that the vibration reaches the entire heat pipe 22 inside. The vibrator 53 was designed to allow the vibration energy to be transmitted while blocking direct contact with the aqueous solution at the boundary of the diaphragm 52 and to connect only the minimum area to the main body in order to suppress the vibration from being absorbed by the ice maker main body.

It is recommended to use a vibrator with a frequency of 28 kHz to 68 kHz, which belongs to a relatively long wave. In addition, it is preferable to adjust the quantity of the vibrator so that the cavitation occurs inside the aqueous solution at the maximum strength.

More complex mechanisms work in the process of separating ice from the heat transfer surface by ultrasonic waves. The water or aqueous solution supercooled below the freezing point by cooling on the heat transfer surface of the heat transfer tube 22 undergoes phase change by eliminating the supercooling state by the co-effect of ultrasonic wave, etc., and the generated ice particles are subjected to the phase change process of other water molecules. By acting as a nucleus, the phase changes occur in a lesser subcooled state.

In this case, inclined dendritic ice, which has a characteristic of easily separating the generated ice, is generated, and the adhesion to the heat transfer surface is very low. As a result, peeling by ultrasonic waves is easily performed. In conclusion, the intensity of the ultrasonic wave should be increased at the initial stage of ice making, but the intensity of the ultrasonic wave can be reduced when the stable ice making is achieved.

In one aspect, the ultrasonic waves can reduce the energy for peeling by reducing the ice adhesion force by eliminating the supercooling state early to reduce the supercooling degree and to allow the phase change to be made in a state of low subcooling. As a result, the ultrasonic wave makes the ice of the slurry ice stable.

Phase-change slurry ices and aqueous solutions must pass through the heat pipes over a range of flow rates. In this case, in order to secure sufficient heat transfer area and increase the flow rate, the tube diameter should be reduced in the situation where the height or length of the heat transfer tube is limited, but in this case, the risk of freezing in the tube due to abnormal supercooling increases, so the flow rate inside the heat transfer tube is within a certain range. Limited.

In addition, in order to prevent re-attachment of water molecules that have undergone phase change to the heat transfer surface, or to prevent the supercooling degree from increasing due to the lack of flow of the heat storage medium on the heat transfer surface, a flow rate of more than a predetermined range is required. Preferably, a flow rate of 0.25 m / s or more, which is an area of turbulent flow, is preferably made, and the maximum speed is 1.5 m / s or less to prevent blockage due to instantaneous supercooling in the heat pipe.

However, since these operating conditions may be disturbed by external or internal abnormal conditions, the ice making device should be equipped with a safety device so that mechanical breakdown or abnormal expansion does not occur when such an abnormality occurs.

Anomalies occurring in the slurry ice deicing device include ice sticking (in-tube freezing) inside the heat transfer pipe 22 and accumulated ice that is formed in the discharge chamber 10 and the heat transfer pipe 22 without being discharged out of the ice maker. Occlusion is a typical phenomenon, it is preferable that the ice making apparatus is provided with a safety device for this.

In the ice making system of the present invention, such a safety device is a pressure sensor 33 capable of detecting a micro pressure change in the front end of the ice machine of the aqueous solution circulation pipe and a flow switch (or flow sensor) 44 in the front or back end aqueous solution circulation pipe of the ice maker. It was installed to detect the abnormality of the flow, by installing a temperature sensor 43 for accurately detecting the temperature of the aqueous solution of the ice maker rear end to detect this when the supercooling is out of a certain temperature range.

In each case where abnormality is detected, stop the refrigeration supply or operate the brine supply cut-off device (73a, 73b) to shut off the refrigerant supply and maintain the circulation of the aqueous solution for a certain time while increasing the intensity of the ultrasonic wave so as to eliminate the blockage and tube freezing. When the condition was resolved and a certain time (for example, 5 to 30 minutes) elapsed, the automatic return to the normal ice making operation was performed.

In the ice making apparatus, equalizing heat exchange and heat transfer surface conditions to the entire heat pipe is one of the important factors in the actual ice making apparatus. If the heat exchange is partially concentrated or the surface where heat exchange is not performed properly, not only the overall heat transfer efficiency is lowered, but also the large intensity of the ultrasonic wave is required so that there is no ice adhesion in the concentrated place. You can get results.

In the present invention, in order to make the structure of the heat exchanger device suitable for this structure, the inlet chamber 30 is positioned at the bottom for an even distribution in the heat transfer tube of the aqueous solution, and the aqueous solution introduced through the inlet is equally distributed to each heat transfer tube. Dispensing device 32 is provided at the inlet so that it can be. The inner diameter of the heat transfer pipe is adjusted (eg, 12 mm to 19 mm) so that a proper pressure drop is maintained between the lower inlet chamber 30 and the upper discharge chamber 40. This kept the proper flow rate uniform.

In addition, in order to equalize the refrigerant-side heat transfer conditions, vertical or horizontal refrigerant flow guide plates 23a and 23b or baffles are suitably used to match the physical and thermodynamic characteristics of the refrigerant.

references

Note 1. Jae Hyo Lee, An Experimental Study on the Effect of Ultrasound on Ice and Paraffin Dissolution, Proceedings of the Korea Society of Facility Engineering Conference 1131-1136 (2001)

Note 2. daisuke MITO et al., Development of Active Control Technology Related to Subcooling of Water, Japan Society of Refrigeration and Air Conditioning 2000, pp. 191-201 (2000)

Note 3. Kang, Chae-Dong et al., Inhibition of ice adhesion on the cooling surface using water-oil emulsion, Proceedings of the Korea Society of Facility Engineers Conference 622-627 (2001)

The ice making system of the present invention solves the technical problem of the slurry ice ice maker by using the ultrasonic effect, the subcooling by the jet stream formation, the promotion of the heat transfer, and the surface cleaning effect. That is, in the ice making apparatus of the present invention, the heat transfer efficiency is further improved and the slurry particles are well separated from the heat transfer surface. In addition, the transport and discharge of the resulting slurry ice is made stable, it is possible to minimize the size of the ice maker.

Claims (16)

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; Slurry ice ice maker comprising an ultrasonic feeding device installed on the inlet chamber. The slurry ice of claim 1, wherein the inflow chamber is positioned below the heat exchange chamber, the discharge chamber is positioned above the heat exchange chamber, and has an inclined plate provided so that an upper surface of the discharge chamber is inclined upwardly toward the discharge port. Ice maker. The slurry ice ice maker according to claim 1 or 2, wherein the heat exchange chamber includes a cell dividing wall formed by dividing two or more heat transfer tubes into one unit cell to provide a plurality of cells. The slurry ice ice maker according to claim 1 or 2, further comprising a refrigerant distribution plate having a plurality of passage holes for supplying the introduced refrigerant evenly around each heat pipe. The slurry ice ice maker according to claim 1 or 2, wherein a plurality of baffles are provided to evenly supply the introduced refrigerant around each heat pipe. According to any one of claims 1 to 5, wherein the ultrasonic supply device A diaphragm connected to or in contact with the inflow chamber, An ultrasonic vibrator attached to the diaphragm, Slurry ice ice maker having an oscillator connected to the vibrator. 6. The slurry ice ice maker according to any one of claims 1 to 5, wherein the ultrasonic feeding device has a vibrator extending into the inlet chamber. The slurry ice ice maker of claim 1 wherein the ultrasonic waves delivered are long waves. The slurry ice ice maker of claim 1 wherein the refrigerant is a primary refrigerant. 9. A slurry ice ice maker according to any one of claims 1 to 8 wherein the refrigerant is brine. The slurry ice ice maker according to any one of claims 1 to 10, wherein a temperature sensor is provided in the heat storage medium discharge pipe. The slurry ice ice maker according to any one of claims 1 to 11, wherein a flow sensor is provided in the heat storage medium discharge pipe or the inlet pipe. The slurry ice ice maker according to any one of claims 1 to 12, wherein the heat storage medium inlet pipe is provided with a pressure sensor. The slurry ice ice maker according to any one of claims 1 to 12, wherein the heat storage medium inlet pipe is provided with a pressure sensor. The slurry ice ice maker according to any one of claims 12 to 14, wherein a valve (73a) is provided for limiting the supply of refrigerant according to the action of the sensor. 11. The slurry ice ice maker of claim 10, further comprising a brine temperature maintaining device.