JPH0861817A - Auger type ice making machine - Google Patents

Abstract

PURPOSE: To produce clean ice and prevent a load from being increased, by providing an impurity removing means for removing impurities contained in water for ice making along a water feed path for feeding water for ice making into a cooling cylinder. CONSTITUTION: City water fed through a water pipe 60 is pressurized by a pressurizing pump 51, flows into a pressurized chamber 57 through a check valve 53 and then flows into a pure water chamber 59 after impurities contained in the city water are removed by a reverse osmosis membrane 56. The pure water thus obtained is stored in a water storage tank 55 through a water feed valve 54 and formed into flake-like, ice chips in an ice making unit 1. Since impurities are stuck onto the pressurized chamber 57 side face of the reverse osmosis membrane 56 during the ice making operation, the water feed valve 54 is closed at every predetermined period of time to open cleaning valves 69, 70, and the water for ice making, which is pressurized by the pressurizing pump 51, is allowed to flow into the pressurized chamber 57 through the pure water chamber 59 and the reverse osmosis membrane 56. At that time, the water for ice making removes the impurities stuck on the reverse osmosis membrane 56 and is discharged together with the impurities through the cleaning valve 70. Accordingly, the impurities can be prevented from being stuck to the ice making unit, an increase of a load during operation is eliminated, and the damage of equipment can be prevented.

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 continuously producing flaky ice pieces.

[0002]

2. Description of the Related Art Conventionally, an auger type ice making machine of this type is used for ice cutting in a cooling cylinder having an evaporating pipe of a cooling device attached to the outer periphery thereof, as disclosed in, for example, Japanese Patent Laid-Open No. 3-105185 (F25C1 / 14). An auger is inserted to guide the water in the water storage tank into the cooling cylinder for cooling, and the ice that has grown on the inner wall of the cooling cylinder is scraped off by the rotation of the auger and sent upward, and the ice compression attached to the upper part of the cooling cylinder. The flaking ice pieces are continuously generated by compression with a molding bearing.

As the ice making water for producing the flaky ice pieces, tap water which is usually supplied to ordinary households is used, and it is connected from a water pipe to a water storage tank through a water supply valve. .

[0004]

However, from the viewpoint of water quality safety standards, tap water contains impurities (calcium, magnesium and other evaporation residues), and these impurities are mixed in the ice produced. As a result, cloudy ice is generated and adheres to the inner surface of the cooling cylinder and the surface of the auger as scale. Therefore, the rotational load of the auger during ice making increases, and the auger motor is damaged and the cooling cylinder is cracked.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and it is possible to remove impurities in ice-making water to produce clean ice and to damage equipment due to an increase in load. An object of the present invention is to provide an auger type ice making machine capable of preventing the generation of ice.

[0006]

In the auger type ice making machine IM according to the invention of claim 1, the ice growing on the inner wall of the cooling cylinder 8 is scraped by the rotation of an ice cutting auger 9 provided in the cooling cylinder 8. Then, the ice pieces are generated by compressing by the ice compression molding bearing 41 attached to the upper part of the cooling cylinder 8, and in the water supply path for supplying the ice making water into the cooling cylinder 8. An impurity removing device 50 for removing impurities in the ice making water is provided.

Further, the auger type ice making machine I according to the invention of claim 2
In the above, M is the pure water producing apparatus 51 using the reverse osmosis membrane 56 as the impurity removing apparatus 50.

[0008]

According to the auger type ice making machine IM of the present invention, the cooling cylinder 8 is provided with the impurity removing device 50 for removing impurities in the ice making water in the water supply path for supplying the ice making water. Impurities in the ice-making water supplied to the inside can be removed. Therefore, it becomes possible to generate clean flake ice that does not contain impurities, and it is possible to prevent impurities from becoming scales and adhering to the inner surface of the cooling cylinder 8 or the surface of the auger 9, thus reducing the load during operation. It becomes possible to prevent the occurrence of damage to the device by eliminating the increase in

Further, the auger type ice making machine I according to the invention of claim 2
In the above description, M uses the pure water producing device 51 using the reverse osmosis membrane 56 as the impurity removing device 50, so that the harmful chemical substances contained in the ice making water (tap water), pathogenic bacteria, and impurities such as trihalomethane are moleculed. You will be able to remove it at the level.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a system configuration diagram of the auger type ice making machine IM of the present invention, FIG. 2 is a vertical side view of the auger type ice making machine IM of the present invention,
FIG. 3 is a vertical sectional side view of the ice making unit 1 of the auger type ice making machine IM of the present invention. The auger type ice maker IM includes an ice storage box 3 formed in a heat insulating box 2, a compressor 4, a condenser 6, and an expansion machine, which constitute the ice making section 1 and the refrigerating apparatus installed above the ice storage box 3. It is composed of a valve 7, a pure water producing device 50 as an impurity removing device provided in the water supply path, a water storage tank 55, and the like.

As shown in FIG. 3, in the ice making unit 1, an auger 9 is concentrically inserted into a cooling cylinder 8 made of stainless steel whose inner wall 8A has a smooth cylindrical inner surface, and the freezing is performed on the outer surface of the cooling cylinder 8. The evaporation pipe 11 constituting the apparatus is spirally wound and closely wound. Further, solder is injected into the gap between the cooling cylinder 8 and the evaporation pipe 11 for the purpose of coupling them and improving the heat transfer performance.

A cover 12 is provided on the outer side of the cooling cylinder 8 and a water seal rubber 13 is attached to the upper end of the cover 12, and a heat insulating material 1 is provided in a space between the cooling cylinder 8 and the cover 12.
4 is filled. A water supply port 16 for supplying ice making water into the cooling cylinder 8 is provided below the cooling cylinder 8 as described later.
Further, a drain port 17 for discharging unnecessary ice making water is attached, and the lower shaft 9A of the auger 9, the water supply port 16 and the drain port 17 are water-sealed by a mechanical seal 18. A drain valve 58 is attached to the drain port 17, and by opening the drain valve 58, unnecessary ice-making water is discharged.

The lower end inlet of the evaporation pipe 11 is connected to a refrigerant inlet 21 provided at the lower end of the cover 12, and the upper end outlet of the evaporation pipe 11 is connected to a refrigerant outlet 22 provided at the upper end of the cover 12. ing. Also, the refrigerant inlet 2
The expansion valve 7 is connected to 1. In addition, 23 and 24 are heat insulating materials for insulating the refrigerant inlet 21 and the refrigerant outlet 22, and the compressor 4, the condenser 6, the expansion valve 7 and the evaporation pipe 11 are sequentially connected in an annular shape by a refrigerant pipe and are well known. The refrigerant circuit of.

The lower shaft 9A of the auger 9 is a lower bolt 3
It is inserted into the lower bearing 33 attached to the housing 32 together with the cooling cylinder 8 by 1, and is connected and supported by the reduction mechanism 36 of the drive motor 37 by the spline joint 34. 41 is an upper bolt 4 in the upper end of the cooling cylinder 8.
2 is a bearing for ice compression molding fixed at 2, and a plurality of tapered blade portions 43 and projections 44 for compressing ice sent from below and cutting it into flakes are formed around the outer surface of the bearing. ing. This ice compression molding bearing 41 has a substantially tubular shape as a whole with an inner hollow that is open vertically, and a stepped portion 41A having an inwardly reduced diameter is formed at the lower portion of the inner peripheral surface having a circular cross section.
Are formed.

The upper shaft 9B of the auger 9 is rotatably inserted into the ice compression molding bearing 41 from below at a distance from the lower shaft, and the upper shaft 9B above the step 41A and the ice compression molding bearing 41A. A storage portion 45 opened upward is formed between the inner peripheral surfaces of the bearing 41. Further, a screw portion 9C is formed on the upper end surface of the upper shaft 9B, and the agitator 46 is detachably engaged with the screw portion 9C from above.

A cylindrical upper bearing 47 is provided between the upper shaft 9B and the ice compression molding bearing 41. In the upper bearing 47, the ice compression molding bearing 41 is attached to the cooling cylinder 8 with the upper bolt 42, a screw lock is applied to the upper bolt 42 to prevent loosening, and the upper shaft 9B of the auger 9 is inserted therein. In addition, in a state before the agitator 46 is attached, the agitator 46 is removably inserted into the storage portion 45 from above, and the lower end thereof is brought into contact with the step portion 41A for positioning. Then, the agitator 46 is screwed onto the upper shaft 9B. The upper part of the ice making unit 1 including the agitator 46 is covered with a heat insulating cover 48.

Next, a pure water producing apparatus 50 as an impurity removing apparatus provided in the water supply path of the auger type ice making machine IM of the present invention will be described. The pure water producing apparatus 50 is composed of a pressurizing pump 51 and a pressurizing tank 52, and a pipe 62 on the inlet side of the pressurizing pump 51 is connected to a water pipe 60 via a water supply valve 61. In addition, the pressurizing pump 51
The pipe 63 on the outlet side of the is branched, one is connected to the pressurizing chamber 57 of the pressurizing tank 52 via the check valve 53, and the other is connected to the pure water chamber 59 of the pressurizing tank 52 via the cleaning valve 69. It is connected.

The pressurizing pump 51 has a pipe 62 on the inlet side.
It is for taking in more tap water, pressurizing and discharging it, and is equipped with a motor (not shown). By driving this motor, a predetermined pressure is applied to the tap water taken into the pressurizing pump 51, and the tap water is discharged to the pressurizing chamber 57 of the pressurizing tank 52 via the check valve 53. At this time, the check valve 53 prevents tap water from flowing backward from the pressure tank 52 side to the pressure pump 51.

The pressure tank 52 is for removing impurities mixed in tap water, and has a reverse osmosis membrane 56 inside.
With the pressure chamber 57 on one side and the pure water chamber 5 on the other side.
The tap water in the pressurizing chamber 57, which is composed of a predetermined container No. 9 and is pressurized by the pressurizing pump 51, passes through the reverse osmosis membrane 56 by this pressure and reaches the pure water chamber 59. Room 59
It is configured to flow out from the pipe 66 on the outlet side.

The reverse osmosis membrane 56 is composed of an aramid-based composite membrane having a large number of pores of, for example, 0.001 micron, which are smaller than those of ordinary filtration membranes, and is effective for removing impurities (toxic chemical substances, pathogenic bacteria, trihalomethanes, etc.) in tap water. Blocks passage at the molecular level. Therefore, the impurities in the tap water in the pressurizing chamber 57 pressurized by the pressurizing pump 51 cannot pass through the reverse osmosis membrane 56 and remain attached to the surface of the reverse osmosis membrane 56 on the pressurizing chamber 57 side. At the same time, only pure water from which such impurities have been removed passes through the pure water chamber 59. As a result, impurities in the tap water are removed, and pure water is obtained on the pure water chamber 59 side.

A pipe 66 on the outlet side of the pure water chamber 59 is connected to a water storage tank 55 via a water supply valve 54. The water supply pipe 67 on the outlet side of the water storage tank 55 is connected to the water supply port 16 of the ice making unit 1 to form a water supply path. The bottom of the water storage tank 55 and the cooling cylinder 8 are set so that the water level of the water storage tank 55 determines the level of the ice making water in the cooling cylinder 8.
The lower part of is always connected by a water supply pipe 67. The water supply valve 54 is opened / closed by a float switch 71 that detects the water level of the water storage tank 55.
Further, 68 is an overflow pipe of the water storage tank 55, by which the water level of the water storage tank 55 (that is, in the cooling cylinder 8) is maintained at a predetermined value.

A cleaning valve 70 is connected to a pipe 67 on the outlet side of the pressurizing chamber 57 of the pressurizing tank 52.
It is always closed. And this cleaning valve 7
0 and the cleaning valve 69 are the pressurizing chamber 5 of the reverse osmosis membrane 56.
It is for removing impurities adhering to the surface on the 7 side, and operates in conjunction with the water supply valve 54. Next, the operation of the auger type ice making machine IM of the present invention having the above configuration will be described. First, the cleaning valves 69 and 70 and the drain valve 58 are closed, and the water supply valve 61 and the water supply valve 54 are open. When the pressurizing pump 51 is operated, the tap water (water for ice making) in the water pipe 60 is pressurized by the pressurizing pump 51, and the check valve 53.
And then flow into the pressurizing chamber 57. The ice-making water that has flowed into the pressurizing chamber 57 passes through the reverse osmosis membrane 56 as described above, impurities are removed in the process, and pure water flows into the pure water chamber 59.

The tap water (pure water) from which impurities have been removed by the reverse osmosis membrane 56 passes through the water supply valve 54 and the water storage tank 55.
Stored in. The ice making water (pure water) stored in the water storage tank 55 is supplied from the water supply port 16 through the pipe 67 to the ice making unit 1.
And is supplied between the auger 9 in the cooling cylinder 8 and the cooling cylinder 8 to fill the inner wall 8A of the cooling cylinder 8 at a predetermined level.

When the ice making operation is started, the refrigerant is discharged from the compressor 4 to the evaporation pipe 11 and condensed in the condenser 6, and then the refrigerant whose pressure is reduced by the expansion valve 7 is supplied to evaporate in the inside. As a result, the cooling cylinder 8 is cooled below the freezing point, and an ice layer grows on the inner wall 8A of the cooling cylinder 8. A screw-shaped blade 10 is formed on the outer surface of the auger 9,
The auger 9 is rotated clockwise by a drive motor 37 via a reduction mechanism 36 when viewed from below.

Due to such rotation, the ice layer grown on the inner wall 8A of the cooling cylinder 8 to a predetermined thickness or more is peeled off by the blade 10 of the auger 9 and transferred to the upper portion of the cooling cylinder 8, where the ice compression molding bearing 41 has a tapered shape. During the process of passing through the blade portion 43 and the protrusion 44, it is compressed into flaky ice pieces. The ice pieces thus generated are pushed out by the upper agitator 46 rotating in conjunction with the auger 9 and stocked in the lower ice storage 3.

During the ice making operation, the pressure chamber 5 for the reverse osmosis membrane 56 is formed.
Since the impurities in the ice making water (tap water) adhere to the surface on the 7 side, the water supply valve 54 is closed and the cleaning valves 69 and 70 are opened every predetermined period. As a result, the ice making water pressurized by the pressure pump 51 flows into the pure water chamber 59 through the cleaning valve 69 as shown by the dotted arrow in the figure, passes through the reverse osmosis membrane 56, and flows into the pressure chamber 57. . At this time,
The ice making water removes impurities adhering to the surface of the reverse osmosis membrane 56 on the pressurizing chamber 57 side, and is discharged together through the cleaning valve 70 from the pipe 67. The cleaning of the reverse osmosis membrane 56 is performed for a predetermined period. Then, when such cleaning is completed, the water supply valve 54 is opened and the cleaning valves 69, 7
Close 0.

As described above, in the embodiment, the pressure applied to the reverse osmosis membrane 56 is reversed and the impurities attached to the reverse osmosis membrane 56 are washed every predetermined period.
The clogging of 6 can be prevented. Therefore, the pure water producing function of the reverse osmosis membrane 56 can be maintained for a long time. Further, in the present invention, the impurities in the ice making water (tap water) are removed by the pure water producing device 50 and are supplied to the ice making unit 1 as pure water (ice making water containing no impurities). It is possible to prevent water stains from adhering to the surface of the auger 9. Therefore, it is possible to prevent the load on the drive motor 37 from increasing, and to prevent damage to the drive motor 37 or cracks in the cooling cylinder 8.

In the embodiment, a pure water producing device using a reverse osmosis membrane is adopted as an impurity removing device, but the invention is not limited to this, and a filtering device using activated carbon, a hollow fiber membrane, ceramics or the like may be adopted. Absent. However, if the pure water producing apparatus as in the embodiment is used, various impurities in the ice making water (tap water) can be smoothly and efficiently removed.

[0029]

As described in detail above, according to the present invention, an impurity removing device for removing impurities in the ice making water is provided in the water supply path for supplying the ice making water into the cooling cylinder.
Impurities in the ice making water supplied into the cooling cylinder can be removed. Therefore, it becomes possible to generate clean flake-shaped ice that does not contain impurities, and it is possible to prevent the inconvenience of impurities adhering to the inner surface of the cooling cylinder and the surface of the auger, and to reduce the load during operation. It is possible to eliminate the increase and prevent the occurrence of equipment damage.

Further, according to the second aspect of the present invention, since the pure water producing apparatus using the reverse osmosis membrane is used as the impurity removing apparatus in the above, impurities such as harmful chemical substances, pathogenic bacteria and trihalomethane contained in the ice making water are used. Can be removed smoothly and efficiently at the molecular level.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an auger type ice making machine of the present invention.

FIG. 2 is a vertical sectional side view of the auger type ice making machine of the present invention.

FIG. 3 is a vertical sectional side view of an ice making section of the auger type ice making machine of the present invention.

[Explanation of symbols]

 1 Ice Making Section 3 Ice Storage Box 8 Cooling Cylinder 9 Auger 10 Blade 11 Evaporation Pipe 16 Water Supply Port 17 Drainage Port 36 Reduction Mechanism 37 Drive Motor 50 Pure Water Production Device (Impurity Removal Device) 51 Pressurizing Pump 52 Pressurizing Tank 53 Check Valve 54 Water Supply Valve 55 Water Storage Tank 56 Reverse Osmosis Membrane 57 Pressurizing Room 59 Pure Water Room IM Ogre Type Ice Machine

Claims (2)

[Claims] 1. A bearing for ice compression molding mounted on an upper portion of the cooling cylinder, shaving off ice growing on an inner wall of the cooling cylinder by rotation of an ice-sharpening auger provided inside the cooling cylinder. In an auger type ice maker that produces ice pieces by compressing with, a water supply path for supplying ice making water into the cooling cylinder is provided with an impurity removing device for removing impurities in the ice making water, Ogre type ice machine. 2. The auger type ice maker according to claim 1, further comprising a pure water producing device using a reverse osmosis membrane as an impurity removing device.