JP2000018781A - Auger type ice maker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auger type ice maker in which ice making water having high scale concentration can be drained quickly and surely. SOLUTION: Water supply is stopped by closing the water supply valve 33 of an ice making water tank 31 for auger type ice maker. Ice making water in a refrigeration cylinder 11 is drained by opening a drip valve 39 under that state. Consequently, ice making water having high scale concentration is drained through a drainage pipe 37. After draining ice making water, the water supply valve 33 is opened again for a predetermined time while opening the drip valve 39. Thereafter, the drip valve 39 is closed and normal ice making operation is reset. Consequently, ice making water having high scale concentration can be drained surely and then the drainage pipe 37 can be cleaned with fresh cleaning water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger type ice making machine for producing flake ice by freezing ice making water supplied into a freezing cylinder.

[0002]

2. Description of the Related Art In an auger-type ice making machine, ice making water is continuously supplied and is always in an ice making state. Basically, ice freezes while leaving impurities such as calcium and magnesium in the ice making water. Therefore, if the ice making is continued, the high concentration of these impurities is concentrated in the ice making water. When the concentration of such impurities, called a scale, is increased, the impurities adhere to a drain pipe or the like, clogging the pipe or causing water leakage. For this reason,
For example, Japanese Patent Publication No. 3-4828 and Japanese Patent Publication No. 62-87
No. 07 discloses a technique of opening a drain valve for removing scale in an auger type ice making machine.

[0003]

The opening of the drain valve for removing the scale disclosed in these publications discharges purified water having a high scale concentration in the refrigeration cylinder and simultaneously releases the purified water from the ice making water tank to the refrigeration cylinder. To supply new water. Therefore, in such a washing method, the scale is not completely removed, but is diluted by fresh water and remains in the freezing cylinder. In addition, in order to completely remove such residual scale, a considerably large amount of water is required to replace the purified water. Furthermore, it takes a very long time to remove the scale.

[0004] The present invention has been made to solve the problems involved in the prior art. An object of the present invention is to provide an auger-type ice maker that can quickly and surely discharge purified water having a high scale concentration.

[0005]

According to a first aspect of the present invention, there is provided an auger type ice making machine which receives ice water from outside through a water supply pipe and detects the ice making water based on a detection value of a water level detecting means. An ice making water tank that controls the degree of water supply by controlling the opening of a water supply valve provided in the middle of the water supply pipe, receives ice making water from the ice making water tank, and is cooled by a cooling unit provided on the outer periphery to produce ice water. A refrigeration cylinder that generates ice, an auger that is rotatably arranged inside the refrigeration cylinder and conveys the generated ice, a driving unit that applies a rotational force to the auger, and a lower part of the refrigeration cylinder for discharging ice making water. In an auger-type ice making machine having a drain pipe extended and provided with a drain valve in the middle thereof, the water supply valve is closed once and the drain valve is opened and the refrigeration system is opened in a washing mode of the drain pipe. And draining the ice making water in the container, opening the water supply valve again for a predetermined period of time with the drain valve open after draining the ice making water, and closing the drain valve. . In the auger ice maker of claim 1,
When the scale concentration is high, the mode is shifted to the drain pipe cleaning mode. The mode is shifted to the cleaning mode periodically or as needed by the user. First, the water supply valve is closed to stop water supply. The closing timing of the water supply valve may or may not consider the water level in the ice making water tank. In this state, the drain valve is opened to drain the ice making water in the freezing cylinder from the drain pipe. Then, the ice making water having the higher scale concentration is drained. After draining the ice making water, the water supply valve is opened again for a predetermined time while the drain valve remains open. Thereby, the scale of the water pipe is quickly and reliably removed. The opening timing of the water supply valve at this time may be a stage where the ice making water is completely drained or a stage where the ice making water has not been completely drained yet. In short, it is only necessary that a situation occurs in which only ice making water having a high scale concentration is discharged in a state where water is not supplied. Here, the predetermined time during which the water supply valve is opened may be a time measured by a timer or a time based on some detecting means, for example, a water level detecting means. When the water supply valve is opened for a predetermined time, the drain valve is closed, and the operation returns to the normal ice making operation. An auger ice maker according to a second aspect is the auger ice maker of the first aspect, wherein the driving means is stopped in the cleaning mode. With this configuration, in addition to the operation of the first aspect, the auger is not driven when the ice making water is insufficient.

According to a third aspect of the present invention, there is provided an auger type ice making machine which receives supply of ice making water from the outside via a water supply pipe and controls an opening of a water supply valve provided in the middle of the water supply pipe based on a detection value of a water level detecting means. An ice making water tank that adjusts the water supply amount, a refrigeration cylinder that receives ice making water from the ice making water tank, and is cooled by a cooling unit provided on the outer periphery to generate ice from the ice making water, and an inside of the refrigeration cylinder. An auger rotatably arranged to convey generated ice, a driving means for applying a rotating force to the auger, and a drain pipe extending from a lower portion of a freezing cylinder and provided with a drain valve in the middle thereof for discharging ice making water In the auger type ice making machine having the above, in the washing mode of the drain pipe, the drain valve is opened to drain the ice making water in the freezing cylinder, and the ice making water in the ice making water tank is supplied with water. Leads to the water injection pump direction by switching means, and controls so as to supply pressurized water to the upstream side of the discharge valve of the water discharge pipe by water injection pump. In the auger-type ice making machine according to the third aspect, the mode is shifted to the drain pipe cleaning mode when the scale concentration is high. The mode is shifted to the cleaning mode periodically or as required by the user. First, the drain valve is opened, and the ice making water in the freezing cylinder is drained from the drain pipe. Then, the ice making water having the higher scale concentration is drained. At this time, it does not matter whether or not the water supply valve is closed to stop the water supply.
On the other hand, the direction of the ice making water in the ice making water tank is switched from the direction of the freezing cylinder to the direction of the water injection pump by the water supply direction switching means, and the pressurized water pressurized by the water injection pump is sent to a drain pipe upstream of the drain valve. . This pressure water quickly and reliably removes the scale of the drain.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a specific embodiment of an auger type ice making machine embodying the present invention will be described with reference to FIGS. (Embodiment 1) As shown in FIG. 1, an auger 12 is accommodated in a refrigeration cylinder 11 made of stainless steel.
The stainless auger 12 has a spiral auger blade 13 formed therearound. A geared motor 16 is provided on the base 15. The geared motor 16 reduces the rotational force of the motor by a reduction device provided inside.
The motor in the present embodiment is driven by a single-phase 100 V, and a three-stage parallel shaft spur gear is used as a reduction mechanism of the reduction gear transmission. The auger 12 is connected to the unillustrated speed reduction mechanism via a spline joint 19. The auger 12 slowly rotates around the axis in the freezing cylinder 11 to scrape ice formed on the inner wall 11a of the freezing cylinder 11 and push it upward.

A cooling pipe 21 made of copper is wound around the outer periphery of the freezing cylinder 11 and fixed by soldering. The cooling pipe 21 as a cooler is connected to a cooling circuit 25 described later, and a coolant is supplied from the cooling circuit 25. Since the refrigerant in the cooling pipe 21 is vaporized, heat of vaporization is deprived and the temperature of the refrigeration cylinder 11 decreases, and ice-making water freezes on the inner wall 11a of the refrigeration cylinder. The refrigeration cylinder 11 and the cooling pipe 21 are surrounded by a tubular heat insulator 20. A refrigeration casing 26 is constituted by the refrigeration cylinder 11, the cooling pipe 21, and the heat insulator 20. Above the freezing cylinder 11, a dew tray 22 is provided. An ice melting heater 27 is wound around the upper part of the dew tray 22 and on the outer periphery of the freezing cylinder 11. The ice melting heater 27 is in an ON state during ice making, and melts excess ice staying in the upper portion of the freezing cylinder 11, and a communication hole (not shown) formed in the upper portion of the freezing cylinder 11 for communicating the inside of the freezing cylinder 11 with outside air. Prevent clogging by excess ice.

An ice compression head 28 is mounted above the dew tray 22. The auger 12 is inside the ice compression head 28.
A bearing (not shown) made of a synthetic resin that rotatably supports the upper end of the housing is fitted. Cutter 2 on top of auger 12
9 is fixed, and rotates in accordance with the rotation of the auger 12. The sherbet-like ice pushed up by the auger 12 is solidified by the ice compression head 28, cut into flakes by the cutter 29, and discharged from the base end of the ice discharge part 30 toward the ice storage tank (not shown).

The refrigeration cylinder 11 receives supply of ice making water from an ice making water tank 31. The ice making water tank 31 is provided at a predetermined height to supply ice making water to the refrigeration cylinder 11, and the water levels of the ice making water tank 31 and the refrigeration cylinder 11 are always at the same level. A water supply pipe 34 connected to an external water pipe (not shown) is connected to the ice making water tank 31. The water supply pipe 32 is provided with a water supply valve 33 for adjusting the water supply to the ice making water tank 31 by opening and closing the valve. The ice making water tank 31 is provided with a water level switch 32 as water level detecting means, and detects the water level in the ice making water tank 31.
The water level switch 32 includes a high level detection unit 32a and a low level detection unit 32b, and closes the water supply valve 33 based on the detection of the high level detection unit 32a, and opens the water supply valve 33 based on the detection of the low level detection unit 32b. . The ice making water tank 31 is provided with a communication hole 35 for communicating outside air with the inside of the tank. The ice making water tank 31 is connected to a lower portion of the refrigeration cylinder 11 via a water pipe 36. A drain pipe 37 is connected to a lower portion of the refrigeration cylinder 11. The drain pipe 37 guides and discharges the ice making water having a high scale concentration in the freezing cylinder 11 into a drain pan 38 in which the base 15 is installed. The drain pipe 37 has a drain valve 3 for adjusting drainage by opening and closing the valve.
9 are provided.

Next, the cooling circuit 25 provided in the auger type ice making machine will be described. As shown in FIG. 2, a Freon-cooled cooling circuit 25 is provided in the auger ice maker. The cooling circuit 25 includes the compressor 41 and the condenser 4
2. The dryer 43, the expansion valve 44, and the cooling pipe 21 of the auger ice maker are connected via a refrigerant delivery pipe 45. The refrigerant flowing through the refrigerant delivery pipe 45 passes through the condenser 42, the dryer 43, and the expansion valve 44 in that order, is vaporized by the cooling pipe 21 as a heat absorbing unit, cools the refrigeration cylinder 11, and is returned to the compressor 41 again. The compressor 41 sucks and compresses the gaseous refrigerant gasified by the cooling pipe 21 and converts it into a high-temperature and high-pressure gas. The condenser 42 has a finned radiator tube (not shown) disposed downstream of the compressor 41, and cools and condenses the high-temperature and high-pressure gaseous refrigerant introduced into the finned radiator tube by the adjacent fan device 47 and condenses the liquid. Refrigerant (at this stage, still in a high temperature and high pressure state). The dryer 43 is disposed downstream of the condenser 42 and removes moisture in the refrigerant.

An expansion valve 44 arranged upstream of the cooling pipe 21 expands the high-temperature and high-pressure refrigerant to lower the temperature and pressure to make it a low-temperature and low-pressure refrigerant. The valve 44 is connected to a temperature-sensitive cylinder 48 provided near the outlet of the cooling pipe 21. The temperature sensing tube 48 detects a rise in the temperature at the outlet of the cooling pipe 21 (superheat (SH)). When the detected superheat (SH) is equal to or greater than a predetermined value, the valve 44 is opened. The amount of refrigerant passing therethrough is increased, and the amount of refrigerant passing through the valve 44 is reduced when the degree of superheat (SH) is equal to or less than a predetermined value.

Next, the electrical configuration of the auger ice maker will be described. As shown in FIG. 3, a central processing unit (CPU) 51 is provided inside a control device (not shown).
The CPU 51 includes various programs for controlling the auger type ice making machine, a cleaning program, and a memory 52 for temporarily storing data. The CPU 51 controls the geared motor 16, the compressor 41, the fan device 47, the ice melting heater 27, the water supply valve 33,
It is connected to a drain valve 39. In addition, the water level switch 32
An ice storage amount sensor 55 for detecting the amount of ice stored in an ice storage tank (not shown), a cleaning lamp 53 for notifying that the apparatus is in the cleaning mode, and a timer 54 are connected. The CPU 41 sets a value of 15 every 12 hours based on the cleaning program in the memory 52.
The ice making water in which the concentration of the scale in the freezing cylinder 11 is increased is discharged in a cycle of minutes.

The operation of such an auger type ice making machine will be described with reference to the timing chart of FIG. T
When the power is turned on at 0, the CPU 651
3 is opened to supply water into the ice making water tank 31. Also,
The ice storage amount sensor 55 is turned on. That is, the state in which the ice storage amount sensor 55 does not detect ice (the ice storage tank is not full) is set to the energized state. From T0 to T1, a preparation stage for supplying ice making water into the ice making water tank 31 and the freezing cylinder 11 is performed. Ice making water tank 31 at T1
The CPU 51 closes the water supply valve 33 when the high level detection unit 32a of the water level switch 32 inside detects that the water level is high. One second later, the geared motor 16 and the fan device 4
7 and the driving of the ice melting heater 27 are started. Then T1
After a lapse of 60 seconds from the start, the driving of the compressor 41 is started at T2. Thereafter, the ice is made. When the ice making water is used by the ice making and the amount of the ice making water in the ice making water tank 31 decreases, the low level detecting unit 32b of the water level switch 32 detects that the water level is low at T3. Then, simultaneously with the detection of the detection signal, the CPU 51 opens the water supply valve 33 again to supply water into the ice making water tank 31. When the high level detection unit 32a of the water level switch 32 detects that the water level is high again at T4, the CPU 51 closes the water supply valve 33 based on the detection signal. Thereafter, ice is continuously produced by this repetition.

When the ice storage amount sensor 55 is turned off at T5, it is determined that the ice storage tank is full.
At 51, the drive of the geared motor 16, the fan device 47, the ice melting heater 27, and the compressor 41 is stopped seven seconds after that point. As a result, the ice making operation is temporarily suspended. When the ice storage amount sensor 55 is turned on again at T6 (the time from T5 to T6 is a time period when the ice storage tank is full and the ice usage condition fluctuates), it means that the ice is used and reduced. In order to restart the ice making operation, the CPU 51 sets the geared motor 16 and the fan device 4 after 7 seconds.
7 and the ice melting heater 27 are driven again, and the compressor 41 is driven again after 60 seconds. And again, water level switch 3
The ice making is continued while adjusting the water level based on the detection of 2.

At T7, the CPU 51 controls the cleaning mode based on the operation of the timer 54. Thereafter, the cleaning mode is set for 15 minutes. If the water supply valve 33 is closed at this stage, the low level detection unit 3 of the water level switch 32
Normal operation is continued until the low water level is detected (T8). If the water supply valve 33 is opened and water is supplied, the water supply valve 33 is closed again and the low level detection unit 32 is further closed.
Normal operation is continued until it is detected that b is at a low water level (that is, from when the water level becomes high to when it becomes low). At T8, the low level detection unit 3 of the water level switch 32
When it is detected that 2b is at the low water level, the driving of the compressor 41 is stopped at T9. Next, CP at T10
U51 opens the drain valve 39 instead of the water supply valve 33. As a result, drainage without water supply is started. At the same time, the drive of the geared motor 16, the fan device 47 and the ice melting heater 27 is stopped, and the washing lamp 53 is turned on to notify the outside that the washing mode is being set.

Next, at T11, 180 seconds after T10, the CPU 51 opens the water supply valve 33. In the present embodiment, the completion of the drainage of the ice making water under the condition of no water supply is set 180 seconds after T10. In this state, still drain valve 3
Since 9 is in the open state, the water supply is drained from the drain valve 39 without being stored in the freezing cylinder 11. At T12, when it is determined that the cleaning is completed after 15 minutes have elapsed based on the operation of the timer 54, the CPU 51 closes the drain valve 39 and turns off the cleaning lamp 53. Drain valve 3
The ice making water is gradually stored in the refrigeration cylinder 11 and the ice making water tank 31 once emptied by the closing of 9. When the water level in the ice making water tank 31 rises and the high level detection unit 32a of the water level switch 32 detects that the water level is high at T13, the CPU 51 detects the water supply valve 3 based on the detection signal.
Close 3. Then, the drive of the geared motor 16, the fan device 47, and the ice melting heater 27 is started one second later than T13. Next, 60 seconds after T13, driving of the compressor 41 is started at T14. Thereafter, the ice making condition is restored.

(Embodiment 2) Embodiment 2 will be described with reference to FIGS. The cooling circuit according to the second embodiment is the same as that of the first embodiment, and a description thereof will not be repeated. Further, the main constituent members in FIG. 5 are the same as those in the first embodiment, and the same structures are denoted by the same reference numerals as those in FIG. In the auger type ice making machine of the second embodiment, the ice making water tank 31 is connected to the lower portion of the refrigeration cylinder 11 via the first water pipe 61. A switching valve 62 is provided in the middle of the first water conduit 61. The switching valve 62 switches the outflow direction of the ice making water in the ice making water tank 31 sent in the direction of the first water guide pipe 61 toward the second water guide pipe 63 in the washing mode. It is a three-way switching valve that does not allow water to flow out. A pump 65 is provided in the middle of the second water pipe 63. The pump 65 applies pressure to the ice making water supplied from the switching valve 62 in the washing mode, and actively sends the water as pressure water toward the freezing cylinder 11.

Next, the electrical configuration of the auger ice maker of the embodiment will be described. In addition to the electrical configuration of the first embodiment, a switching valve 62 and a pump 65 are connected to the CPU 51 via a drive circuit (not shown). The CPU 41 discharges the ice making water in which the concentration of the scale in the freezing cylinder 11 has become high in a cycle of 20 minutes every 12 hours based on the cleaning program in the memory 52.

The operation of such an auger ice maker will be described with reference to the timing chart of FIG. T
From 0 to T6, the operation is the same as that of the first embodiment, and the description is omitted. In the second embodiment, the operation of the switching valve 62 and the operation of the pump 65 are added. However, since these are operated only in the cleaning mode, they are not involved in the operations from T0 to T6.

At T7, the CPU 51 controls the cleaning mode based on the operation of the timer 54. Thereafter, the cleaning mode is set for 20 minutes. If the water supply valve 33 is closed at this stage, the low level detection unit 3 of the water level switch 32
Normal operation is continued until the low water level is detected (T8). If the water supply valve 33 is opened and water is supplied, the water supply valve 33 is closed again and the low level detection unit 32 is further closed.
Normal operation is continued until it is detected that b is at a low water level (that is, from when the water level becomes high to when it becomes low). At T8, the low level detection unit 3 of the water level switch 32
When it is detected that 2b is at a low water level, the drive of the compressor 31 is first stopped at T9. Next, CP at T10
U51 opens the drain valve 39 instead of the water supply valve 33. As a result, drainage without water supply is started. At the same time, the drive of the geared motor 16, the fan device 47 and the ice melting heater 27 is stopped, and the washing lamp 53 is turned on to notify the outside that the washing mode is being set.

Next, at T11 180 seconds after T10, the CPU 51 opens the water supply valve 33. In the present embodiment, the completion of the drainage of the ice making water under the condition of no water supply is set 180 seconds after T10. Simultaneously with the opening of the water supply valve 33, the switching valve 62 is switched to the position of V2, that is, the position where the ice making water does not flow into any of the first and second water guide pipes 61 and 63. Then, the ice making water does not flow to the downstream side from the switching valve 62 (that is, the drainage from the drain pipe 37 is temporarily stopped in the washing mode), and the ice making water is stored in the ice making water tank 31. At T12, when the high level detection unit 32a of the water level switch 32 detects that the water level is high, CP
U51 switches the switching valve 62 based on the detection signal so that the ice making water flows in the direction of the V3, that is, the second water pipe 63. On the other hand, three seconds after T12, the CPU 51
Drives the pump 65. By driving the pump 65, the pressurized water is guided to the drain pipe 37 via the first water pipe 61, and the drain pipe 37 is washed.

At T13, when the timer 54 is activated and the washing mode ends, the CPU 51 switches the switching valve 62 to the position V1, ie, the direction of the first water pipe 61, and supplies the ice making water (wash water) to the pump 65. At the same time, the drain valve 39 is closed and the cleaning lamp 53 is turned off.
Then, three seconds after T13, the CPU 51 stops driving the pump 65. When the water level in the ice making water tank 31 rises and the high level detection unit 32a of the water level switch 32 detects that the water level is high at T14, the CPU 51 closes the water supply valve 33 based on the detection signal. Then, the drive of the geared motor 16, the fan device 47, and the ice melting heater 27 is started one second later than T14. Then from T14 to 60
After a lapse of seconds, the drive of the compressor 41 is started at T15. Thereafter, the ice making condition is restored.

Embodiments 1 and 2 configured as above
In the auger type ice making machine of the above, the following operation and effects are produced.
Since the high-scale-concentration water remaining in the drain pipe 37 is washed away cleanly, the scale does not adhere to the drain pipe 37. As a result, the problem associated with the scale adhesion is eliminated. Further, the water supply valve 33 is once closed to drain all the ice making water inside, and then the drain pipe 37 is further filled with fresh water.
Since water is washed, water having a high scale concentration is not diluted and remains, and the effect of preventing adhesion of scale is improved. In addition, in the case where new water is supplied after all the water having a high scale concentration is discharged, the amount of water required for cleaning is smaller than in the case where water is always supplied. Further, the auger-type ice making machine is provided with a drain pan 38 to receive water leakage and dew condensation. However, drainage during this washing is drained from the drain pipe 37 to the drain pan 38 without preparing another pan. Can be washed. In addition, since the geared motor 16 is also stopped at the time of cleaning, members of the geared motor 16 (for example, a mechanical seal portion) do not wear out even if there is no ice making water that performs a lubricating function. Further, the ice making water tank 31 is provided with a communication hole 35 for communicating outside air with the inside of the tank, so that the ice making water flows out of the tank 31 smoothly. Similarly, the refrigeration cylinder 1
The ice making water in 1 also has a communication hole (not shown), so that the ice making water flows out from the refrigeration cylinder 11 smoothly.

In the second embodiment, since the drain pipe 37 can be washed with the pressurized water, the adhesion of the scale is further prevented. The present invention can be embodied with the following modifications. In the second embodiment, the switching valve 62 is set to the position V2 (see FIG. 7), the ice making water is temporarily stored in the ice making water tank 31, the water for cleaning is secured, and then the switching valve 62 is moved toward the pump 65. I had to switch. However, if the water for cleaning can be supplied to the pump 65, it is not necessary to store the water for cleaning in this way. In the above-described embodiment, the water in the freezing cylinder 11 and the ice making water tank 31 is completely drained once during the cleaning. However, with some ice making water remaining, drain valve 3
9 may be closed. The point is that it is sufficient if the ice making water with a high scale concentration can be effectively drained. Furthermore,
In the above embodiment, the timer 54 determines the end of the cleaning with the pressure water by the pump 65. However, the cleaning with the pressurized water may be terminated based on the low level detection unit 32b of the water level switch 32 detecting that the water level is low as the determination means. In the above-described embodiment, the cleaning is performed in a predetermined cycle based on the cleaning program of the CPU 51. However, the operator may input a cleaning switch by himself to set the cleaning mode. Others
The present invention can be freely implemented without departing from the spirit of the present invention.

[0026]

As described above, according to the first aspect of the present invention, the water supply pipe is closed and only the ice making water having a higher scale concentration is discharged without newly supplying water to the ice making water tank. Efficient and high-concentration ice making water can be reliably discharged to clean the tubes. Further, in the invention of claim 2, in addition to the effect of the invention of claim 1, it is not necessary to drive the driving means for rotating the auger in a state where the amount of ice making water as the lubricant is small. Hateful. Furthermore, in the invention of claim 3, since the pressurized water can be flowed to the drain pipe by the water injection pump, the adhesion of scale to the drain pipe is further prevented.

[0027]

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an auger-type ice maker according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating the cooling circuit according to the first embodiment including the cooling circuit.

FIG. 3 is a block diagram illustrating the electrical configuration of the first embodiment.

FIG. 4 is a timing chart of the same embodiment 1.

FIG. 5 is a schematic sectional view of an auger-type ice maker according to the first embodiment of the present invention.

FIG. 6 is a block diagram illustrating the electrical configuration of the first embodiment.

FIG. 7 is a timing chart of the same first embodiment.

[Explanation of symbols]

11 Refrigeration cylinder, 12 Auger, 16 Drive motor as drive means, 31 Ice water tank, 37 Drain pipe, 39 Drain valve, 62 Switching valve, 65 Pump.

Claims (3)

[Claims] 1. An ice making water tank which receives supply of ice making water from outside via a water supply pipe and controls an opening of a water supply valve provided in the middle of the water supply pipe based on a detection value of a water level detecting means to adjust a water supply amount. And a refrigeration cylinder that receives the supply of ice making water from the ice making water tank and that is cooled by a cooling unit provided on the outer periphery to generate ice from the ice making water, and that the generated ice is rotatably arranged inside the refrigeration cylinder. In an auger type ice machine having an auger to be conveyed, a driving means for applying a rotational force to the auger, and a drain pipe extending from a lower portion of a freezing cylinder and provided with a drain valve in the middle thereof for discharging ice making water, In the washing mode of the drainage pipe, once the water supply valve is closed and the drainage valve is opened to drain the ice making water in the refrigeration cylinder. Predetermined An auger-type ice maker characterized in that the water supply valve is opened for a time and the drain valve is controlled to be closed. 2. The auger-type ice making machine according to claim 1, wherein said driving means is stopped in said washing mode. 3. An ice making water tank which receives supply of ice making water from outside via a water supply pipe and controls an opening of a water supply valve provided in the middle of the water supply pipe based on a detection value of a water level detecting means to adjust a water supply amount. And a refrigeration cylinder that receives the supply of ice making water from the ice making water tank and that is cooled by a cooling unit provided on the outer periphery to generate ice from the ice making water, and that the generated ice is rotatably arranged inside the refrigeration cylinder. In an auger type ice machine having an auger to be conveyed, a driving means for applying a rotational force to the auger, and a drain pipe extending from a lower portion of a freezing cylinder and provided with a drain valve in the middle thereof for discharging ice making water, In the washing mode of the drain pipe, the drain valve is opened to drain the ice making water in the refrigeration cylinder, and the ice making water in the ice making water tank is supplied by a water supply pump by water supply direction switching means. An auger-type ice maker, wherein the water is pumped in a direction, and is controlled by an injection pump to supply pressurized water upstream of the drain valve of the drain pipe.