JP2002364953A - Sherbet type ice making device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of damage and breakage in a scraper 6d and improve an ice making efficiency, in a sherbet type ice making device equipped with a scraping type ice making evaporator 6 constituted of an inner tubular body 6a provided with a compressor 1, a condenser 2 and an expansion valve 4, while accommodating a rotary scraper 6d opposed to the inner peripheral surface of the same and provided with outlet and inlet ports 6e, 6f for liquid to be frozen such as water or the like, and an outer tubular body 6b fitted to the inner tubular body 6a so as to form an annular gap of an evaporating chamber 6c between the inner tubular body 6a and the outer tubular body 6b. SOLUTION: A surge tank 7 is provided at a site higher than the height of the ice making evaporator 6, and a refrigerating cycle pipeline 5 coming from the expansion valve 4 and a refrigerating cycle pipeline 8 for the compressor 1 are connected to the upper part of the surge tank. A refrigerant descending pipeline 9 connected to the lower part of the surge tank is connected to the lower part of the evaporating chamber 6c, and a refrigerant ascending pipeline 10 for the surge tank is connected to the upper part of the evaporating chamber respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice making device for producing sherbet-like ice used for heat storage.

[0002]

2. Description of the Related Art Recently, sherbet-like ice has been manufactured and stored using surplus electric power at night, and is used for air-conditioning and the like in the daytime.

One of the ice making apparatuses for producing the sherbet-shaped ice is disclosed in, for example, Japanese Patent Application Laid-Open No.
As described in JP-A-781 and JP-A-11-2478, an outer cylinder is formed in an inner cylinder having a built-in rotary screwer for the inner peripheral surface, and an evaporation chamber having an annular gap therebetween. To supply the icing liquid such as water into the inner cylinder, and the refrigeration refrigerant in the refrigeration cycle into the evaporation chamber of the annular gap between the inner cylinder and the outer cylinder. Supplying, cooling the inner cylinder from the outside by the evaporation of the refrigeration refrigerant, generating ice on the inner peripheral surface of the inner cylinder, and scraping the ice with the screver,
There is an apparatus using a so-called scraping type ice making evaporator in which sherbet-shaped ice is taken out from the inner cylinder.

Conventionally, a sherbet type ice making apparatus using this scraping type ice making evaporator is disclosed in, for example,
No. 210787, and the like.

That is, a compressor for a refrigeration refrigerant,
In a refrigeration cycle comprising a condenser for liquefying the refrigeration refrigerant by cooling with the compressor, an expansion valve for the liquefied refrigeration refrigerant, and an evaporator for evaporating the refrigeration refrigerant from the expansion valve. Using the scraping type ice making evaporator as the evaporator, the refrigeration refrigerant from the expansion valve flows into the evaporation chamber of the annular gap in the ice making evaporator from the lower part thereof and is compressed from the upper part. The connection is made so as to flow out to the machine.

[0006]

However, the refrigerating cycle of charging the refrigerating cycle from the compressor through the condenser and the expansion valve to the evaporator and then returning from the evaporator to the compressor is described. The amount is regulated as small as possible in order to prevent the refrigeration refrigerant from returning to the compressor in a liquid state. In addition to this, the liquid level in the evaporation chamber of the refrigeration refrigerant filled in the refrigeration cycle fluctuates greatly depending on the operating condition due to the change in the amount of the refrigeration refrigerant retained in the condenser. Furthermore, in the said condenser, when the heat transfer area cannot be used effectively due to stagnation of the refrigeration refrigerant, or incomplete liquefaction that all the refrigeration refrigerant cannot be completely liquefied, If the refrigeration refrigerant flows downstream of the expansion valve as it is, the ice making efficiency may decrease.

Therefore, as in the prior art, the scraping type ice making evaporator is provided with a refrigerating refrigerant flowing from an expansion valve into the evaporating chamber of the annular gap in the ice making evaporator from a lower portion thereof with respect to the refrigeration cycle. And the connection is made so as to flow out from the upper part to the compressor, the liquid level of the refrigeration refrigerant in the evaporation chamber of this scraping type ice making evaporator is restricted to a small amount of the filling amount and condensed. It becomes extremely low due to stagnation in the vessel and incomplete liquefaction in the condenser, in other words, evaporation of the refrigeration refrigerant in the evaporation chamber.
Vaporization occurs in a relatively low liquid level portion of the evaporating chamber, and in a higher portion, it becomes a refrigerant vapor layer and cannot be used effectively as a heat transfer area, and the heat transfer area becomes considerably small. Therefore, the temperature difference between the evaporated refrigerant for freezing outside the inner cylinder and the liquid to be frozen inside the inner cylinder increases.

Accordingly, not only does the evaporating temperature of the refrigeration refrigerant decrease accordingly, but also the ice making efficiency decreases, and the ice generated on the inner peripheral surface of the inner cylinder becomes hard and adheres to the inner peripheral surface. However, a large and non-uniform load is applied to the scraper that scrapes the scraper, and the problem that the scraper is damaged or damaged frequently occurs.

In addition, since lubricating oil for the compressor is mixed with the refrigeration refrigerant circulating in the refrigeration cycle path, in the conventional structure, the refrigeration refrigerant containing the lubricating oil is scraped off. The lubricating oil flows into the evaporating chamber of the ice making evaporator, and the concentration of the lubricating oil increases due to the evaporation and vaporization of the refrigeration refrigerant in the evaporating chamber. From the heat transfer to the outside, in other words, the heat transfer coefficient in the scraping type ice making evaporator will be reduced,
There was also a problem that ice making efficiency was low.

[0010] It is a technical object of the present invention to provide a sherbet-shaped ice making device which eliminates the above-mentioned problems when the scraping type ice evaporator is used.

[0011]

In order to achieve this technical object, a first aspect of the present invention is to provide a compressor for a refrigeration refrigerant,
The compressor is provided with a condenser for liquefying the refrigeration refrigerant compressed by the compressor, and an expansion valve for the liquefied refrigeration refrigerant. A sherbet-shaped ice making device comprising a scraping-type ice evaporator comprising an outer cylindrical body fitted to an inner cylindrical body having an inlet / outlet for a frozen liquid so as to form an evaporation chamber having an annular gap therebetween. In the apparatus, a surge tank is provided at a position higher than the scraping type ice making evaporator, and a refrigeration cycle line from the expansion valve is provided in the surge tank. While connecting the cycle pipes, a refrigerant descending pipe from the lower part of the surge tank is provided at a lower part of the evaporation chamber in the scraping type ice making evaporator, and a refrigerant riser to the surge tank is provided at an upper part of the evaporating chamber. tube Were each connected. It is characterized by.

According to a second aspect of the present invention, in the first aspect of the present invention, the refrigeration refrigerant at a liquid level among the refrigeration refrigerants in the surge tank is extracted into the surge tank. A refrigerant extraction conduit was connected, and heating means was provided in the refrigerant extraction conduit. "

[0013] Still further, according to a third aspect of the present invention, in the first or second aspect, the liquid in the refrigeration refrigerant is separated in the middle of a refrigeration cycle line from the condenser to an expansion valve. And a liquid separation tank for supplying the liquid to the expansion valve. "

[0014]

In the above construction, the refrigeration refrigerant that has passed through the expansion valve enters the surge tank, and the refrigeration refrigerant accumulates in a liquid state in a lower portion of the surge tank, while the refrigeration refrigerant is kept in a liquid state. The gas is sent to a compressor.

The liquid refrigeration refrigerant accumulated in the lower part of the surge tank enters the lower part of the evaporation chamber of the scraping type ice making evaporator through the refrigerant descending pipe, and is filled in the evaporation chamber. The liquid is cooled so as to remove heat from the frozen liquid in the cylinder, and the temperature rises. Due to the rise in temperature, a part of the liquid evaporates and returns from the upper part of the evaporation chamber to the surge tank via the refrigerant rising pipe. Thus, natural circulation is performed by the temperature difference and the rising and rising of bubbles.

In this way, the frozen liquid in the inner cylinder is cooled substantially uniformly over the entire surface of the inner cylinder in a state in which the evaporating chamber of the scraping type ice making evaporator is filled with the liquid freezing refrigerant. As the heat transfer area in the inner cylinder can be used 100% effectively, a decrease in the evaporation temperature of the refrigeration refrigerant can be prevented, and as a result, ice adheres partially hard to the inner peripheral surface of the inner cylinder. Can be prevented,
Damage and breakage of the scever in the inner cylinder can be reliably reduced, and furthermore, a decrease in ice making efficiency can be prevented.

When the lubricating oil contained in the refrigeration refrigerant enters the surge tank, most of the lubricating oil floats and separates on the liquid surface, thereby scraping the lubricating oil from the refrigerant descending channel. Since the amount of lubricating oil entering the evaporating chamber in the evaporator for ice making can be reduced, and the concentration of the lubricating oil in the evaporating chamber can be reduced, the decrease in the heat transfer coefficient due to the lubricating oil in the refrigerant for freezing can be avoided. Therefore, high ice making efficiency can be reliably maintained.

In this case, the lubricating oil floating and separated on the liquid level in the surge tank is extracted from the surge tank together with a small amount of refrigerant by the structure as described in claim 2. After being vaporized by heating by the heating means, it is returned to the compressor.

[0019] Further, with the configuration as described in claim 3, since the refrigerant for refrigeration can always be introduced into the surge tank in a liquid state, the above-mentioned effect can be promoted. There is an advantage that the surge tank can be downsized.

[0020]

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

FIG. 1 shows a first embodiment.

In this figure, reference numeral 1 denotes a compressor for compressing a refrigeration refrigerant, and reference numeral 2 denotes a refrigeration refrigerant compressed by the compressor 1 introduced through a refrigeration cycle line 3 and is cooled by water cooling or cooling. Reference numeral 4 denotes an expansion valve provided in the refrigeration cycle line 5 from the condenser 2 by cooling by air cooling to condense and liquefy.

Reference numeral 6 denotes a conventionally known scraping type ice evaporator. This scraping type ice making evaporator 6
For example, Japanese Patent Application Laid-Open Nos.
As described in JP-A-2478, etc., an inlet 6e and an outlet 6f of a frozen liquid such as water circulating between a heat storage tank (not shown) and a built-in rotary type screwer 6d for the inner peripheral surface. And an outer cylinder 6b is fitted on the inner cylinder 6a so as to form an evaporation chamber 6c with an annular gap therebetween. I have.

Further, reference numeral 7 denotes a sealed surge tank.

The surge tank 7 is disposed at a position higher than the scraping type ice making evaporator 6, and the refrigeration cycle line 5 having the expansion valve 4 is connected to the surge tank 7. The refrigeration cycle line 8 to the compressor 1 is connected to the upper part of the surge tank 7.

Further, the lower portion of the surge tank 7 and the lower portion of the evaporation chamber 6c of the scraping type ice making evaporator 6 are connected via a refrigerant descending pipe 9, while the surge tank 7 is connected to the lower portion. The upper part and the scraping type ice evaporator 6
Between the upper part of the evaporation chamber 6c and the refrigerant rising line 10
Connect through.

In addition, a refrigerant extraction line 11 is connected to the surge tank 7 at a liquid level inside the surge tank 7, and the refrigerant extraction line 11 is connected to the refrigeration cycle pipe to the compressor 1. While connected to the suction side of the compressor 1 such as the passage 8, the flow control valve 1
2 and a heating means such as a heater 13 using electricity or the like as a heat source.

The flow control valve 12 in the refrigerant extraction line 11 is controlled by a liquid level sensor (not shown) provided in the surge tank 7 to open and close the refrigerant extraction line 11 to the compressor 1. Is controlled to be as small as possible (preferably, only the lubricating oil floating and separated on the liquid surface is extracted).

In this configuration, the refrigeration refrigerant that has passed through the expansion valve 4 enters the surge tank 7, and the refrigeration refrigerant liquid accumulates in the lower portion of the surge tank 7, while the refrigeration refrigerant gas is It is sent to the compressor 1 via the cycle line 8 and is compressed.

The liquid refrigeration refrigerant stored in the surge tank 7 enters the lower portion of the evaporation chamber 6c of the scraping type ice making evaporator 6 through the refrigerant descending pipe 9, and the evaporation chamber 6
c, and is cooled so as to remove heat from the liquid to be frozen in the inner cylindrical body 6a, so that the temperature rises. Natural circulation is performed by the temperature difference and the rising and rising of bubbles, such as returning to the surge tank 7 via the refrigerant rising line 10.

Thus, the frozen liquid in the inner cylinder 6a is filled with the liquid freezing refrigerant in the evaporation chamber 6c of the scraping type ice making evaporator 6, and the inner cylinder 6a is cooled.
Cooling can be performed substantially evenly over the entire surface of a.

The ice formed on the inner peripheral surface of the inner cylinder 6a is scraped off from the inner peripheral surface by a screver 6d.
It becomes sherbet-like ice, is discharged from the frozen liquid outlet 6f together with the frozen liquid that has not been frozen, and is stored in a heat storage tank (not shown).

The circulation amount of the liquid refrigeration refrigerant with respect to the evaporation chamber 6c is arbitrarily adjusted by a control valve 9a provided in the refrigerant descending pipe 9. In addition, it is preferable that the refrigerant rise pipe 10 be configured so as to minimize the flow resistance such as increasing the inner diameter in order to secure a predetermined circulation amount.

On the other hand, when the lubricating oil contained in the refrigeration refrigerant from the expansion valve 4 enters the surge tank 7, most of the lubricating oil floats and separates on the liquid surface, thereby causing the refrigerant to flow. Since the amount of lubricating oil entering the evaporating chamber 6c of the scraping type ice making evaporator 6 from the descending pipe 9 is reduced, the concentration of the lubricating oil in the evaporating chamber 6c can be greatly reduced.

Further, the lubricating oil floating and separated on the liquid level in the surge tank 7 is extracted from the surge tank along with a small amount of refrigerant from the refrigerant extraction line 11 and is heated by a heating means such as a heater 13. After being vaporized in the compressor 1
Is returned to.

Next, FIG. 2 shows a second embodiment.

In the second embodiment, in addition to the first embodiment shown in FIG.
A closed liquid separation tank 14 is provided in the middle of the refrigeration cycle line 5 which reaches the surge tank 7 through the above, where liquid in the refrigerant for refrigeration is separated, and only the liquid in the refrigerant for refrigeration is provided with an expansion valve. This is configured to be sent to the surge tank 7 after passing through.

That is, the refrigeration refrigerant from the condenser 2 is introduced into the upper part of the liquid separation tank 14 and sent out from the lower part of the liquid separation tank 14 to an expansion valve. Two liquid level sensors 15a and 15b for detecting the liquid level are provided at appropriate intervals in the vertical direction, and two flow control valves 16a and 15b are provided in a pipe from the lower part of the liquid separation tank 14 to the expansion valve 4. 16b are provided side by side, and expansion valves 4a, 4b are provided downstream of the two flow control valves 16a, 16b, respectively, while the two flow control valves 16a, 16b are connected to the two liquid level sensors 15a, 16b.
a and 15b, when the upper liquid level sensor 15a of the two liquid level sensors detects the liquid level, the liquid separation tank 1
By controlling the opening and closing so that the flow rate from the liquid separation tank 14 is increased and the flow rate from the liquid separation tank 14 is reduced when the lower liquid level sensor 15b detects the liquid level, Thus, only the liquid in the refrigeration refrigerant is sent to the surge tank 7 via the expansion valves 4a and 4b.

In controlling the two flow control valves 16a and 16b, one of the two flow control valves 16a and 16b is always kept at a constant opening, and the opening of the other flow control valve 16b is kept constant. , The two liquid level sensors 15a, 1
By increasing or decreasing at 5b, it is configured to improve the accuracy of the opening / closing control under a state in which a constant amount of the liquid of the refrigerant for refrigeration is always supplied to the surge tank 7. .

According to the second embodiment, since the refrigerant for refrigeration can always be supplied to the surge tank 7 in a liquid state, the volume of the surge tank 7 can be reduced by this amount. The size can be reduced.

FIG. 3 shows a third embodiment.

In the third embodiment, the apparatus according to the present invention is provided with an "ice making mode" shown in FIG. 4, a "heating mode" shown in FIG. 5, an "ice making / hot water mode" shown in FIG. It is configured to be able to switch to the four modes of “cooling mode” shown.

That is, the condenser 2 of the above embodiment is mounted with a number of heat transfer tubes 2a 'having a large number of fins on the outer peripheral surface between an inlet header 2b' and an outlet header 2c '. An air-cooled multi-tube condenser 2 ′ is provided outside of each heat transfer tube 2 a ′ through a fan 2 d ′ to allow air to flow therethrough. A separate expansion valve 4a, 4b for each of the valves 16a, 16b, and an indirect heat exchanger 17 for allowing water to enter through line 22a and exit through line 22b; A four-way switching means 19 is provided in the middle of a refrigeration cycle line 3 ′ from 1 to the multi-tube condenser 2 ′ and a refrigeration cycle line 18 from the surge tank 7 to the indirect heat exchanger 17. The two expansion valves 4 , On the downstream side of the 4b, it provided two switching valves 20a, and 20b in parallel, moreover, a configuration in which two three-way switching means 21a, and 21b respectively.

By the switching operation of the four-way switching means 19, the two switching valves 20a, 20b and the two three-way switching means 21a, 21b, the mode is switched to the four modes as described below.

[Ice making mode] As shown by the thick line in FIG.
The refrigerating refrigerant compressed by the compressor 1 is supplied to the inlet header 2b 'of the multi-tube condenser 2' via the four-way switching means 19.
The refrigerant is cooled and condensed, and the refrigerant for refrigeration from the outlet header 2a 'of the multi-tube condenser 2' is guided to the liquid separation tank 14 through one of the three-way switching valves 21b. Refrigerant for the two flow control valves 16a, 16b
Then, through the two expansion valves 4a and 4b, the refrigerant is led to the surge tank 7 via one of the switching valves 20b, and the refrigeration refrigerant in the upper part of the surge tank 7 is led to the compressor 1 via the refrigeration cycle circuit 8. Switch to.

Thus, sherbet-like ice can be produced in the scraping type ice making evaporator 6.

[Heating Mode] As shown by the thick line in FIG.
The refrigeration refrigerant compressed by the compressor 1 is guided to the indirect heat exchanger 17 for water via the four-way switching means 19 to be cooled and condensed (in this case, the indirect heat exchanger 17 becomes a condenser). The refrigeration refrigerant from the heat exchanger 17 is guided to the liquid separation tank 14 via one of the three-way switching valves 21b, and the separated refrigeration refrigerant is supplied to the two flow control valves 16a and 16b.
b and both expansion valves 4a, 4b, the other switching valve 20a
And the outlet header 2a 'in the multi-tube condenser 2' through the other three-way switching valve 21a and evaporates by absorbing heat from atmospheric air (in this case, the multi-tube condenser 2 'is Then, the refrigeration refrigerant vaporized by the multi-tube condenser 2 'is guided from the four-way switching means 19 to the surge tank 7 via the refrigeration cycle line 18, and the refrigeration at the upper part in the surge tank 7 is performed. The refrigerant for use is switched to be guided to the compressor 1 via the refrigeration cycle circuit 8.

As a result, in the indirect heat exchanger 17, the water that enters through the pipe 22a and exits through the pipe 22b can be warmed and heated, and heating can be performed using this hot water.

In the heating mode, ice making in the scraping type ice making evaporator 6 is stopped.

[Ice making / hot water mode] As shown by the thick line in FIG. 6, the refrigeration refrigerant compressed by the compressor 1 is guided to the indirect heat exchanger 17 for water through the four-way switching means 19 to be cooled and condensed. (In this case, the indirect heat exchanger 17 becomes a condenser.) The refrigerant for refrigeration from the indirect heat exchanger 17 is led to the liquid separation tank 14 through one of the three-way switching valves 21b.
The separated liquid refrigeration refrigerant is supplied to both flow control valves 16.
a, 16b and the two expansion valves 4a, 4b, and is led to the surge tank 7 via one of the switching valves 20b, and the refrigeration refrigerant in the upper part of the surge tank 7 is supplied to the compressor 1 via the refrigeration cycle circuit 8. Switch to lead to.

Thus, in the indirect heat exchanger 17, the water that enters through the pipe 22a and exits through the pipe 22b can be warmed and heated, while ice can be made in the scraping-type evaporator 6 for making ice.

Therefore, the heat at the time of ice making can be recovered for the production of hot water.

In the ice making / hot water mode,
The multi-tube condenser 2 'is at rest.

[Cooling mode] As shown by the thick line in FIG.
The refrigerating refrigerant compressed by the compressor 1 is supplied to the inlet header 2b 'of the multi-tube condenser 2' via the four-way switching means 19.
And the refrigerant is cooled and condensed, and the refrigeration refrigerant from the outlet header 2a 'of the multi-tube condenser 2' is supplied to one of the three-way switching valves 2
1b to the liquid separation tank 14, and the separated liquid refrigeration refrigerant passes through the two flow control valves 16a, 16b and the two expansion valves 4a, 4b, and passes through the other switching valve 20a and the other three-way switching valve. 21a, the water is led to the indirect heat exchanger 17 for water, and enters through the pipe 22a and evaporates due to heat absorption from water exiting the pipe 22b (in this case, the indirect heat exchanger 1).
7 becomes an evaporator), and the refrigerating refrigerant from the indirect heat exchanger 17 is supplied to the four-way switching means 19 and the refrigeration cycle circuit 18.
Through the refrigeration cycle circuit 8 to switch the refrigerant to the compressor 1 via the refrigeration cycle circuit 8.

As a result, in the indirect heat exchanger 17, the water that enters through the pipe 22a and exits through the pipe 22b can be cooled to make cold water, so that cooling can be performed using this cold water.

In this cooling mode, ice making in the scraping type ice making evaporator 6 is stopped.

In the third embodiment, when the multi-tube condenser 2 'is constructed as described above, each heat transfer tube 2a' in the multi-tube condenser 2 'is
As shown in FIG. 3, the entrance header 2 is set at an appropriate angle θ with respect to the horizontal plane (preferably at least 4 degrees with respect to the horizontal plane).
b 'or the outlet header 2c' is inclined so as to be lower, so that the refrigeration refrigerant condensed and liquefied in each of the heat transfer tubes 2a is supplied to the inlet header 2b 'or the outlet header 2c.
Since it is possible to prevent the water from successively flowing in the direction of c 'and stay in each of the heat transfer tubes 2a, the heat transfer coefficient of the multi-tube condenser 2' can be improved.

Further, by eliminating the refrigeration refrigerant stagnation point in the refrigeration cycle path including the condenser 2 and absorbing the fluctuation of the refrigeration refrigerant only in the operating condition by the surge tank 7, the scraping type ice maker is used. Since the evaporator 6 is constantly filled with the liquid of the freezing refrigerant, the ice making efficiency is improved and the reliability of the scroll lever 6d is also improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a state in which an ice making mode is set in the third embodiment.

FIG. 5 is a diagram showing a state when a heating mode is set in the third embodiment.

FIG. 6 is a diagram illustrating a case where an ice making / hot water mode is set in the third embodiment.

FIG. 7 is a diagram showing a state where a cooling mode is set in the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 2 'Multi-tube condenser 4, 4a, 4b Expansion valve 6 Scraping type ice making evaporator 6a Inner cylinder 6b Outer cylinder 6c Evaporation chamber 6d Screver 7 Surge tank 9 Refrigerant down line 10 Refrigerant rise line 11 Refrigerant extraction line 13 Heater 14 Liquid separation tank 15a, 15b Liquid level sensor 16a, 16b Flow control valve

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F25C 1/00 F25C 1/00 D

Claims (3)

[Claims] 1. A refrigeration compressor, comprising: a compressor for cooling the refrigeration refrigerant compressed by the compressor; a condenser for liquefying the refrigeration refrigerant by cooling; and an expansion valve for the liquefied refrigeration refrigerant. A scraper comprising an outer cylinder body fitted to an inner cylinder body having a built-in rotatable screver and having an inlet / outlet for a liquid to be frozen such as water so as to form an evaporation chamber with an annular gap therebetween. In a sherbet-shaped ice making device comprising a scraping type ice making evaporator, a surge tank is provided at a position higher than the scraping type ice making evaporator, and a refrigeration cycle line from the expansion valve is provided in the surge tank. The upper part of the surge tank is connected to a refrigeration cycle line to the compressor, while the lower part of the evaporation chamber in the scraping type ice making evaporator is a refrigerant descending line from the lower part of the surge tank. Upper part of evaporation chamber And a refrigerant rising pipe line connected to the surge tank. 2. The refrigerant tank according to claim 1, wherein the surge tank is connected to a refrigerant extraction line for extracting the refrigerant at the liquid level from the refrigerant in the surge tank to the compressor. A sherbet-shaped ice making device, wherein a heating means is provided in a refrigerant extraction conduit. 3. The method according to claim 1, wherein the liquid in the refrigerant for refrigeration is separated and supplied to the expansion valve in the middle of a refrigeration cycle line from the condenser to an expansion valve. A sherbet-shaped ice making device comprising a liquid separation tank.