JPS6151231B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of the Invention The present invention scrapes off ice that has grown on the inner surface of a freezing cylinder using an auger and transfers it to a compression passage, where it is compressed to continuously form hard ice pieces. This paper relates to an auger-type ice maker manufactured in Japan, and in particular relates to the inner structure of the freezing cylinder.

(b) Prior art and its problems Since the inner surface of a freezing cylinder requires extremely high dimensional accuracy, the inner surface of the freezing cylinder is generally finished by honing. but,
It is inevitable that the inner surface of the honed cylinder will have a mesh-like finish that intersects with the axial direction of the auger disposed inside the cylinder.

These mesh-like finishing lines also intersect with the direction of movement of the ice, so these finishing lines create resistance and prevent the smooth movement of ice, and also cause ice to become clogged in the finishing lines. There have been cases where abnormal noises have been generated and overload has occurred, making it difficult to make ice.

Furthermore, the ice scraped by the auger slides and rotates on the inner surface of the freezing cylinder and is moved upwards into the compression passage, where most of the water is removed and hard ice is continuously formed. To go. In particular, in front of the compression passage, the rotating force of the ice exceeds the lifting force of the ice caused by the auger, causing the ice to rotate synchronously with the auger, making it impossible for ice to enter the compression passage smoothly, causing the ice to compress. It became clogged near the entrance of the passageway, causing abnormal noises and overloading, making it impossible to continue making ice.

(c) Purpose of the present invention The present invention prevents abnormal noise and overload by preventing ice clogging and synchronized rotation of the ice and auger during transfer, and smoothing the movement of ice into the compression passage. To provide a freezing cylinder which is improved so as to achieve stable ice making operation.

(d) Key Points of the Invention At least, a groove and a finishing line are formed on the upper inner surface of the freezing cylinder corresponding to the auger in parallel to the axial direction of the auger to allow ice to move smoothly to the compression passage.

(e) Embodiments of the present invention Figure 1 shows the internal structure of an auger ice maker according to the present invention in longitudinal section. A lower shaft 3 of a motor (not shown) housed in a motor cover 2 placed on the upper surface of the outer wall is protruded, and its tip is formed into a first helical gear 4 .
A second helical gear 6 that meshes with the helical gear 4 and transmits the rotation of the motor is fixed to the upper part of the first gear shaft 5 rotatably supported between the bottom wall and the top wall of the casing 1. A first small gear 7 is fixed to the lower part. A second gear shaft 8 is spaced apart from the first gear shaft 5 and between the bottom wall and the top wall of the casing 1.
A second small gear 9 is fixed to the upper part of this gear shaft 8, and a first small gear 7 is fixed to the lower part of this gear shaft 8.
The central gear 10 that meshes with is fixed. Furthermore, the gear shaft of the large gear 11 that finally meshes with the second small gear 9,
That is, the output shaft 12 has a lower cylindrical roller bearing 13 formed by an upper housing 13A press-fitted into the lower part of the shaft 12, a lower housing 13B press-fitted into the bottom wall of the casing 1, and a roller portion 13C interposed between the two.
and the lower housing 1 press-fitted into the upper part of the output shaft 12.
4B, an upper housing 14A press-fitted into the upper wall of the casing 1, and a roller portion 14C interposed between the two. This output shaft 12 has an upper cylindrical roller bearing 1
After being provided with an oil seal 15 above the casing 4, it penetrates the casing 1 and protrudes upward. The output shaft 12 that protrudes in this way is formed by a low wall 16 that is formed integrally with the casing 1 and a high wall 18 that is also formed integrally with the casing 1 so that a water leakage groove 17 is formed on the outside of this low wall 16. Be surrounded. Therefore, the tip of the output shaft 12 has a water leak receiving groove 17.
An umbrella-shaped draining member 19 is fitted so as to face the draining member 19, and leakage water that has passed through the draining member 19 and fallen into the water receiving groove 17 is removed by cutting out or drilling a hole in the high wall 18. The water is led to an outwardly low drainage passage 20 communicating with the casing 1 and drained to the outside, thereby preventing water from leaking into the inside of the casing 1. The output shaft 12 is placed on the high wall 18 of the casing 1 and is fixed to the high wall 18 with bolts 21 at the upper end of the output shaft 12 located inside the hollow support 22. A vertical groove 23 is formed.

On the other hand, on the support stand 22 is a refrigeration cylinder 2 around which an evaporation tube 25 of the refrigeration system is wrapped, the outer surface of which is covered with a heat insulating wall 24.
6 is inserted, and the two are connected by a bolt 28 with an O-ring 27 interposed at the lower end. As a result, the auger 29 is rotatably arranged inside the freezing cylinder 26 standing upright on the support stand 22, and the lower end of the lower shaft 29A of the auger 29 is connected to the output shaft 1.
2, a large number of vertical grooves 30 are formed in the axial direction. A spacer 31 is placed between the opposing surfaces of the output shaft 12 and the lower shaft 29A of the auger 29 in order to absorb vertical dimensional errors when the auger 29 is placed inside the freezing cylinder 26. The output shaft 12 and the lower shaft 29A of the auger 29 are arranged in mutual longitudinal grooves 23 and 3 inside the support base 22.
The outer surface of the spline joint 32 is supported by a sliding bearing 33 press-fitted into the support base 22, and the washer 34 fitted to the output shaft 12 allows the spline joint 32 to be Prevents it from coming off. In addition, a mechanical seal 35 supported on the support stand 22 is applied to the lower part of the freezing cylinder 26 to seal water, and the water in the cistern (not shown) is connected to a water supply pipe connected to the lower part of the freezing cylinder 26. 36 to a predetermined level of the freezing cylinder 26.

On the other hand, the upper shaft 29B of the auger 29 is supported by an upper bearing 37 inserted into the freezing cylinder 26, and around the upper bearing 37 are ribs 38 protruding from the outer surface of the bearing 37 at a predetermined interval. 26
A plurality of ice compression passages 3 divided by the inner surface 26A of
9 is formed in the same direction as the axial direction of the auger 29,
An ice breaking section 40 is formed integrally with the upper bearing 37 facing an extension of the ice compression passage 39. The upper bearing 37 and the L-shaped ice guide tube 41 inserted into the outer surface of the freezing cylinder 26 are jointly fastened to the freezing cylinder 26 by bolts 42 . Furthermore, the guide tube 41
Inside the ice condensation passage 39 rises continuously,
An agitator 43 for moving ice pieces broken into a predetermined shape by the ice breaking section 40 toward the outlet 41A is screwed onto the end of the upper shaft 29B of the auger 29 and is rotatably arranged.

As shown in detail in FIG. 2, a plurality of grooves 44 are formed on the inner surface 26A of the freezing cylinder 26 at predetermined intervals in parallel to the axial direction of the auger 29. The groove 44 may be formed at least on the upper inner surface 26A of the freezing cylinder 26 corresponding to the upper part of the auger 29 and reaching the compression passage 39;
Since it takes a relatively long time to cut the frozen cylinder 26 one by one with a shaper, it is possible to form the entire length of the frozen cylinder 26 as shown in the figure by drawing, which does not require a relatively long time. good.

For reference, the specific dimensions of the groove 44 are as follows: opening width (1.5 mm), depth (0.5 mm).
It was sufficiently effective.

Further, a large number of finishing lines 45 are formed between each groove 44 in parallel with the axial direction of the auger 29. One means of producing this finish 45 is to use an abrasive material in which an abrasive agent is attached to a porous flexible resin material, such as porous nylon, and insert the abrasive material into the freezing cylinder 26 to form the auger 29. The finishing marks 45 are formed by polishing the inner surface 26A of the freezing cylinder 26 by moving in the axial direction. By changing the number of times the abrasive was moved, the inner surface 26A of the freezing cylinder 26 was finished to a surface roughness of 6S (6 microns) or less, and the effect was sufficiently exhibited.

Note that the groove shape is not limited to the concave groove 44, but may be a V-shaped groove 46 as shown in detail in FIG.

Next, the operation will be explained based on the above configuration. When the ice-making operation starts, refrigerant flows through the evaporation tube 25 to cool the freezing cylinder 26, and the water supplied to a predetermined level of the freezing cylinder 26 flows through the inner surface 26 of the freezing cylinder 26.
It gradually freezes to A. On the other hand, the rotation of the motor is transmitted from the first helical gear 4 to the second helical gear 6, and this rotation is transmitted to the first helical gear 6 coaxial with the second helical gear 6.
This rotation is further transmitted to the large gear 10 via the second small gear 9.
1. Then, the rotation of the large gear 11 is 1
The rotation speed is reduced to about 10 rotations per minute, and this rotation is finally transmitted to the auger 29 via the output shaft 12.

The ice frozen on the inner surface 26A of the freezing cylinder 26 scraped off by the auger 29 is removed by the auger 29 by the action of the grooves 44 and the finishing lines 45.
The refrigeration cylinder 26 smoothly rises in parallel with the axial direction of the refrigeration cylinder 26. In front of the compression passage 39, ice with a relatively low water content that tends to rotate synchronously with the auger 29 gets stuck in the groove 44 and is completely prevented from rotating synchronously with the auger 29, causing the upward force of the auger 29 to be prevented. is applied and smoothly enters the compression passage 39. In this compression passage 39, most of the moisture is removed and the material becomes hard.
When coming out of the compression passage 39, hard ice pieces that are broken into a predetermined size by an ice breaking section 40 are continuously released.

(f) Effects of the present invention The structure of the grooves and finishing lines of the present invention formed on the inner surface of the freezing cylinder prevents ice from clogging while the ice scraped by the auger ascends toward the compression passage, and from synchronous rotation with the auger. Since this can be reliably prevented, abnormal noises can be completely eliminated, excessive loads can be reduced, and the ice can rise smoothly toward the compression passage, allowing stable ice making to be carried out at all times.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an auger-type ice maker according to the present invention, FIG. 2 is a perspective view of a freezing cylinder with a portion of the freezing cylinder cut away to disclose an embodiment of the present invention, and FIG. FIG. 7 is a perspective view of a freezing cylinder disclosing another embodiment of the invention. 26...Frozen cylinder, 26A...Frozen cylinder inner surface,
29... Auger, 44, 46... Groove, 45...
...Finishing.

Claims (1)

[Claims] 1. An auger type that uses an auger rotatably placed inside a freezing cylinder to scrape off ice that has grown on the inside of the cylinder, transports it upward, and compresses it in a compression passage to continuously create hard ice pieces. In the ice machine,
A plurality of grooves parallel to the axial direction of the auger are formed at predetermined intervals on the upper inner surface of the freezing cylinder corresponding to at least the auger and the compression passage, and the inner surface of the cooling cylinder between the grooves is parallel to the grooves. An auger-type ice maker characterized by the formation of numerous finishing marks.