JP2011122764A - Drum type ice-making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum type ice-making machine reduced in cost by simplifying a structure for maintaining sealing around a rotating shaft of a cylindrical drum. <P>SOLUTION: The drum type ice-making machine 101 producing ice from water on the outer peripheral face 2a of the rotated cylindrical drum 2 and separating the ice on the outer peripheral face 2a of the cylindrical drum 2 is equipped with: the rotating shaft 3 provided in the cylindrical drum 2 and supporting the cylindrical drum 2; a refrigerant introduction housing 11 provided around the rotating shaft 3 and having a first refrigerant seal S1 and a second refrigerant seal S2 coming into contact with the rotating shaft 3 and sealing a space with the rotating shaft 3; and a spacer housing 13 provided between the refrigerant introduction housing 11 and the cylindrical drum 2 around the rotating shaft 3. Since the spacer housing 13 having different length in the axial direction of the rotating shaft 3 is selectively used, the position in which the first refrigerant seal S1 and the second refrigerant seal S2 come into contact with the rotating shaft 3 can be changed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drum type ice making machine.

In an automatic ice maker, a layered ice is formed on the surface of the cylindrical drum by rotating a cylindrical drum cooled by an evaporator in an ice making water tank in which ice making water is stored. There is a drum-type ice making machine that continuously makes ice pieces by peeling with a cutter.
The drum type ice making machine has a configuration in which a refrigerant circulates inside a cylindrical drum. And a refrigerant | coolant is introduce | transduced and derived | led-out from the rotating shaft of a cylindrical drum. For example, the refrigerant is introduced from a hole provided in the cylindrical outer peripheral surface of the rotating shaft, circulates through the inside of the cylindrical drum, and performs heat exchange with the outside on the cylindrical outer peripheral surface of the cylindrical drum. It is derived from a hole provided at the end of the.

In order to prevent the refrigerant from leaking from between the housing and the rotating shaft when the refrigerant is introduced from the hole on the outer peripheral surface of the rotating shaft, the housing is formed so as to surround the hole on the outer peripheral surface around the rotating shaft. Furthermore, a sealing material is provided between the housing and the rotating shaft to seal the space therebetween.
And since a rotating shaft rotates with a cylindrical drum, with the aging use of a drum-type ice making machine, wear generate | occur | produces in the outer peripheral surface or sealing material of a rotating shaft, and it becomes impossible to maintain the sealing between a housing and a rotating shaft.

  Patent Document 1 describes a vacuum sealing mechanism that is a sealed structure around a rotating shaft, and the vacuum sealing mechanism can move a sealing material along the axial direction of the rotating shaft. In this vacuum seal mechanism, a seal holder that is displaceable along the axial direction of the rotary shaft is provided inside a housing that surrounds the rotary shaft, and a plurality of annular seal members are provided on the seal holder. In addition, a plurality of annular seal walls projecting so as to come into contact with the sealing material are formed on the outer peripheral surface of the rotating shaft. And some seal walls in a plurality of seal walls and some seal materials in a plurality of seal materials are constituted so that it may mutually contact, and by contact with a seal material and a seal wall, The space between the rotating shaft and the seal holder is sealed. Furthermore, an operating member is connected to the seal holder, and the operating member protrudes outside through the housing. Then, by operating the operating member from the outside of the housing, the internal seal holder can be displaced along the axial direction of the rotating shaft.

  Therefore, in the vacuum seal mechanism, when wear due to aging occurs on the seal wall or the seal material and the sealing function is lowered, the seal holder is displaced along the axial direction of the rotary shaft, The sealing material is brought into a non-contact state, and at the same time, another new sealing wall and the sealing material are brought into a contact state, and the sealing function is renewed and maintained.

JP 2008-115946 A

  However, since the vacuum seal mechanism of Patent Document 1 has a configuration in which the seal holder inside the housing is displaced by the operation member outside the housing, the structure becomes complicated, and the operation member and the sealing part at the movable part of the seal holder are sealed. There is a problem that the structure becomes complicated. Further, since the structure of the vacuum seal mechanism and the sealing structure thereof are complicated, there is a problem that the number of processes required for processing and assembling of each member increases and the cost increases.

  The present invention has been made in order to solve such problems, and a drum type ice making machine that reduces the cost by simplifying the structure for maintaining the sealing around the rotating shaft of the cylindrical drum is provided. The purpose is to provide.

  In order to solve the above problems, a drum type ice making machine according to the present invention is a drum type ice making machine that generates ice from water on the surface of a rotationally driven cylindrical drum and peels off the ice on the surface of the cylindrical drum. A rotary shaft provided on the cylindrical drum and supporting the cylindrical drum; and a seal housing provided around the rotary shaft, the seal housing having a sealing material that contacts the rotary shaft and seals between the rotary shaft; A spacer housing provided around the rotation shaft between the seal housing and the cylindrical drum, and a spacer housing having a different length in the axial direction of the rotation shaft is selectively used, so that the sealing material is connected to the rotation shaft. The contact position can be changed.

Refrigerant introduced into and drawn out from the cylindrical drum flows through the rotating shaft, the seal housing introduces or draws refrigerant from the rotating shaft, and the seal material extends from between the seal housing and the rotating shaft. The leakage of the refrigerant may be prevented.
The drum-type ice making machine may further include a bearing housing that rotatably supports the rotating shaft between the spacer housing and the cylindrical drum.

  Of the housings, the housing closest to the cylindrical drum has at least two annular grooves provided around the rotating shaft and spaced apart from each other, and water provided selectively in at least one of the at least two grooves. A sealing material that seals between the rotary shaft and the housing closest to the cylindrical drum in contact with the rotary shaft, and prevents leakage of water between the housing closest to the cylindrical drum and the rotary shaft. You may have a sealing material for water sealing.

  According to the drum type ice making machine according to the present invention, it is possible to reduce the cost by simplifying the structure for maintaining the sealing around the rotating shaft of the cylindrical drum.

It is the perspective view seen from the upper part which shows the structure of the drum type ice making machine which concerns on embodiment of this invention. It is a disassembled perspective view of the drum type ice maker of FIG. It is a cross-sectional side view along the III-III line of FIG. FIG. 4 is a partial cross-sectional side view taken along line IV-IV in FIG. 1. FIG. 5 is a partial cross-sectional side view in which the spacer housing of FIG. 4 is replaced.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment A configuration of a drum type ice making machine 101 according to an embodiment of the present invention will be described with reference to FIGS.

1 and 2, a drum type ice making machine 101 includes side walls 10a and 10b, and an ice making water tank body 1a supported by engaging both sides thereof with the side walls 10a and 10b, and the side walls 10a and 10b. The ice making water tank 1 is constituted by the ice making water tank main body 1a.
Further, the drum type ice making machine 101 includes a cylindrical drum 2 that is supported by the rotating shaft 3 and is rotatable about the rotating shaft 3 in the ice making water tank main body 1a. The rotating shaft 3 of the cylindrical drum 2 is rotatably supported on both sides thereof by bearing housings 14 and 15 provided on the side walls 10a and 10b, respectively.

An evaporator (not shown) is provided inside the cylindrical drum 2, and the rotating shaft 3 of the cylindrical drum 2 has one end portion 3 a (see FIG. 2) connected to a refrigeration circuit (not shown). When the refrigerant is introduced into the cylindrical drum 2 from the refrigerant circuit, the refrigerant flows through the cylindrical drum 2 and exchanges heat with the outside on the cylindrical outer peripheral surface 2a which is the surface of the cylindrical drum 2. After that, it is led to the refrigeration circuit.
The other end portion 3b (see FIG. 1) of the rotating shaft 3 of the cylindrical drum 2 protrudes from the side wall 10b and is connected to a motor (not shown), and the cylindrical drum 2 is rotated by driving the motor.

Referring to FIG. 3, ice making water, which is water for generating ice, is immersed in the ice making water tank main body 1 a of the drum type ice making machine 101 so that a part of the cylindrical drum 2 is immersed therein. Has been met. In the present embodiment, tap water is used for ice making water.
Further, a cutter 4 having a metal blade is provided above a predetermined level of ice making water. The cutter 4 is provided with its blade edge directed obliquely upward and toward the portion of the outer peripheral surface 2 a of the cylindrical drum 2 that is out of the ice making water, and extends along the axial direction of the rotary shaft 3 of the cylindrical drum 2. (See FIGS. 1 and 2). Further, the cylindrical drum 2 is driven to rotate in a rotational direction R indicated by a broken line arrow in FIG. 3 and is counterclockwise on the drawing, and the cutter 4 is on the outer peripheral surface 2a of the cylindrical drum 2 rotating in the rotational direction R. Remove the ice.

Further, a slope 5 for guiding ice pieces is fixed on the upper surface of the cutter 4 so as not to make a boundary with the cutter 4, and the slope 5 is provided to be inclined downward along the upper surface of the cutter 4. ing.
Further, a chute 8 is fixed to the ice making water tank 1, that is, the side walls 10a and 10b (see FIG. 1) to guide ice pieces falling from the slope 5 to an ice storage (not shown). The chute 8 extends downward, and the ice pieces falling inside the chute 8 enter the ice storage as they are.

  Next, referring to FIG. 4, a detailed configuration of the periphery of the end portion 3 a of the rotating shaft 3 of the cylindrical drum 2 is shown.

The end portion 3a of the rotary shaft 3 has a refrigerant supply path 3d for supplying refrigerant from a refrigeration circuit (not shown) to the cylindrical drum 2, and a refrigerant flowing through the cylindrical drum 2 in the refrigeration circuit. And a refrigerant discharge path 3e. The refrigerant discharge path 3e is located at the center of the rotating shaft 3 and extends in the axial direction, and communicates with the refrigeration circuit at a refrigerant discharge port 3f formed at the end 3ab of the end portion 3a. The refrigerant supply path 3d is formed in a cylindrical shape so as to surround the outside of the refrigerant discharge path 3e. Therefore, the refrigerant supply path 3d and the refrigerant discharge path 3e have a double tube structure. Further, a refrigerant supply port 3c communicating with the refrigerant supply path 3d is formed in the cylindrical outer peripheral surface 3aa of the end portion 3a, and the refrigerant in the refrigeration circuit is supplied from the refrigerant supply port 3c to the refrigerant supply path 3d. Is done.
Therefore, after the refrigerant supplied from the refrigeration circuit (not shown) is introduced into the refrigerant supply path 3d from the refrigerant supply port 3c, circulates in the cylindrical drum 2, and performs heat exchange with ice-making water outside the cylindrical drum 2. The refrigerant passes through the refrigerant discharge path 3e and is discharged from the refrigerant discharge port 3f to the refrigeration circuit.

  The end portion 3a of the rotary shaft 3 is provided with a substantially cylindrical bearing housing 14 surrounding the rotary shaft 3, and the bearing housing 14 is inserted into a bearing hole 10a1 provided in the side wall 10a. . Further, a cylindrical spacer housing 13 surrounding the rotation shaft 3 is connected to the side opposite to the side wall 10 a of the bearing housing 14. The bearing housing 14 and the spacer housing 13 are fixed to the side wall 10a together by a fastener 16 (see FIG. 2) penetrating them, and are integrated with the side wall 10a.

  Further, a cylindrical auxiliary seal housing 12 surrounding the rotary shaft 3 is connected to the side opposite to the side wall 10a of the spacer housing 13, and further, the side of the auxiliary seal housing 12 opposite to the side wall 10a is connected to the rotary shaft. A refrigerant introduction housing 11 having a substantially cylindrical shape surrounding the periphery of the cylinder 3 is connected. The auxiliary seal housing 12 and the refrigerant introduction housing 11 are fixed to the spacer housing 13 together by a fastener 17 (see FIG. 2) penetrating them, and are integrated with the spacer housing 13. Here, the refrigerant introduction housing 11 constitutes a seal housing.

Further, on the opposite side of the refrigerant introduction housing 11 from the side wall 10a, a cylindrical refrigerant discharge housing 20 is connected and fixed by a fastener 17 passing therethrough. The refrigerant discharge housing 20 has a discharge opening 20a, and constitutes a discharge port for discharging the refrigerant discharged from the refrigerant discharge port 3f of the rotating shaft 3 to a refrigeration circuit (not shown). (See Figures 1 and 2)
Therefore, the bearing housing 14, the spacer housing 13, the auxiliary seal housing 12, the refrigerant introduction housing 11, and the refrigerant discharge housing 20 are fixed to each other and integrated with the side wall 10a.

The refrigerant introduction housing 11 has a cylindrical refrigerant introduction housing main body 11a and a refrigerant introduction pipe 11b protruding from the refrigerant introduction housing main body 11a. The refrigerant introduction pipe 11b constitutes a refrigerant introduction path 11c. The refrigerant introduction path 11c communicates with the refrigerant supply port 3c of the rotating shaft 3, and introduces refrigerant from a refrigeration circuit (not shown) into the refrigerant supply port 3c.
Further, in the cylindrical inner peripheral surface 11aa of the refrigerant introduction housing main body 11a, the front and rear in the axial direction of the rotary shaft 3 with respect to the refrigerant introduction path 11c have a rectangular cross section and have an annular shape. A first refrigerant seal groove G1 and a second refrigerant seal groove G2 are formed. Each of the first refrigerant seal groove G1 and the second refrigerant seal groove G2 extends in a direction perpendicular to the axial direction of the rotary shaft 3 and surrounds the rotary shaft 3.

  An annular first refrigerant seal S1 is provided along the first refrigerant seal groove G1 in the first refrigerant seal groove G1, and an annular second refrigerant seal S2 is provided in the second refrigerant seal groove G2. It is provided along the second refrigerant seal groove G2. The first refrigerant seal S1 is in contact with the inner surface of the first refrigerant seal groove G1 and the outer peripheral surface 3aa of the rotary shaft 3, and the second refrigerant seal S2 is rotated with the inner surface of the second refrigerant seal groove G2. The first refrigerant seal S1 and the second refrigerant seal S2 are in contact with the outer peripheral surface 3aa of the shaft 3, and seal between the inner peripheral surface 11aa of the refrigerant introduction housing body 11a and the outer peripheral surface 3aa of the rotary shaft 3. For this reason, the first refrigerant seal S1 and the second refrigerant seal S2 are such that the refrigerant introduced into the refrigerant supply port 3c from the refrigerant introduction path 11c is the outer circumference of the inner peripheral surface 11aa of the refrigerant introduction housing body 11a and the rotary shaft 3. The leakage from the surface 3aa to the outside of the refrigerant introduction housing body 11a is prevented. Here, the first refrigerant seal S1 and the second refrigerant seal S2 constitute a sealing material.

Further, the first refrigerant seal S <b> 1 is also in contact with the refrigerant discharge housing 20, and seals the connecting portion 1120 between the refrigerant introduction housing body 11 a and the refrigerant discharge housing 20. The second refrigerant seal S2 is also in contact with the auxiliary seal housing 12, and seals the connecting portion 1112 between the refrigerant introduction housing body 11a and the auxiliary seal housing 12.
Further, since the first refrigerant seal S1 is restrained in the front-rear direction by the refrigerant introduction housing body 11a and the refrigerant discharge housing 20, it is always fixed at the same position with respect to the refrigerant introduction housing body 11a. Since the second refrigerant seal S2 is restrained in the front-rear direction by the second refrigerant seal groove G2 and the auxiliary seal housing 12, it is always fixed at the same position with respect to the refrigerant introduction housing body 11a.

The auxiliary seal housing 12 has a cylindrical auxiliary seal housing main body 12a. In the cylindrical inner peripheral surface 12aa of the auxiliary seal housing main body 12a, a third refrigerant seal groove G3 having a rectangular cross section and an annular shape is formed. The third refrigerant seal groove G3 extends in a direction perpendicular to the axial direction of the rotary shaft 3 and surrounds the rotary shaft 3.
In the third refrigerant seal groove G3, an annular third refrigerant seal S3 is provided along the third refrigerant seal groove G3. The third refrigerant seal S3 is in contact with the inner surface of the third refrigerant seal groove G3 and the outer peripheral surface 3aa of the rotary shaft 3, and between the inner peripheral surface 12aa of the auxiliary seal housing body 12a and the outer peripheral surface 3aa of the rotary shaft 3. Seal. For this reason, when the refrigerant leaks from the second refrigerant seal S2 and flows between the inner peripheral surface 12aa of the auxiliary seal housing body 12a and the outer peripheral surface 3aa of the rotary shaft 3, the third refrigerant seal S3 This prevents the refrigerant that has flown behind the auxiliary seal housing main body 12a, that is, between the spacer housing 13 and the outer peripheral surface 3aa of the rotary shaft 3.

Further, the third refrigerant seal S3 is also in contact with the spacer housing 13, and seals the connecting portion 1213 between the auxiliary seal housing main body 12a and the spacer housing 13.
Further, since the third refrigerant seal S3 is restrained in the front-rear direction by the third refrigerant seal groove G3 and the spacer housing 13, it is always fixed at the same position with respect to the auxiliary seal housing body 12a.

  The spacer housing 13 has a cylindrical spacer housing body 13a. On the inner peripheral surface 13aa of the spacer housing body 13a, an annular first bearing hermetic seal BS1 is provided along the inner peripheral surface 13aa and is in contact with the inner peripheral surface 13aa and the outer peripheral surface 3aa of the rotary shaft 3. Further, a connecting portion 1314 between the spacer housing body 13a and the bearing housing 14 is provided with an annular spacer housing sealing seal 13b. The spacer housing sealing seal 13b seals the connecting portion 1314.

The bearing housing 14 has a cylindrical bearing housing main body 14a and a flange portion 14b provided on the front side of the bearing housing main body 14a. The flange portion 14b protrudes radially outward from the bearing housing body 14a and has an annular shape. In the bearing housing 14, the bearing housing body 14a is inserted into the bearing hole 10a1 of the side wall 10a, the flange portion 14b abuts on the side wall 10a, and is fixed to the side wall 10a by a fastener 16 (see FIG. 2).
An annular bearing 14c is provided on the front side of the inner peripheral surface 14aa of the bearing housing body 14a. The bearing 14c is in contact with the inner peripheral surface 14aa of the bearing housing main body 14a and the outer peripheral surface 3aa of the rotary shaft 3, and the rotating rotary shaft 3 is on the inner peripheral surface 14aa of the bearing housing main body 14a via the bearing 14c. Supported by

Further, on the inner peripheral surface 14aa of the bearing housing body 14a, an annular second bearing sealing seal BS2 is provided on the rear side of the bearing 14c. The second bearing hermetic seal BS2 is provided along the inner peripheral surface 14aa and is in contact with the inner peripheral surface 14aa and the outer peripheral surface 3aa of the rotary shaft 3. Therefore, the bearing 14c is sealed by the first bearing sealing seal BS1 and the second bearing sealing seal BS2 together with the surrounding space.
Further, on the inner peripheral surface 14aa of the bearing housing body 14a, a first groove WG1 and a second groove WG2 having a rectangular cross section and having an annular shape are formed on the rear side of the second bearing hermetic seal BS2. Each of the first groove WG1 and the second groove WG2 extends in a direction perpendicular to the axial direction of the rotary shaft 3 and surrounds the rotary shaft 3. The first groove WG1 and the second groove WG2 are separated from each other and arranged in the front-rear direction, and have the same shape.

In addition, an ice-making water seal WS1 that is an annular water-sealing seal material is provided along the first groove WG1 inside the first groove WG1. The ice making water seal WS1 is in contact with the inner surface of the first groove WG1 and the outer peripheral surface 3aa of the rotating shaft 3, and the ice making water tank 1 is formed between the inner peripheral surface 14aa of the bearing housing body 14a and the outer peripheral surface 3aa of the rotating shaft 3. The ice making water (see FIGS. 1 and 3) is prevented from leaking.
An annular seal 14d is provided between the bearing housing body 14a and the side wall 10a. The seal 14d seals between the bearing housing body 14a and the side wall 10a, and the ice making water tank 1 (see FIG. 1) and 3) are prevented from leaking out.

Next, the operation of the drum type ice making machine 101 according to the embodiment of the present invention will be described with reference to FIGS.
Referring to FIG. 3, when the refrigeration circuit (not shown) is operated to cool the cylindrical drum 2, layered ice is formed on the outer peripheral surface 2 a of the cylindrical drum 2 below the surface of the ice making water filled in the ice making water tank 1. Grows with time. This ice appears on the water surface by the rotation of the cylindrical drum 2 in the rotation direction R, and is supercooled to become dry ice that does not contain moisture. Then, the ice is peeled off by the cutter 4 to form thin scale-like ice pieces, slides down on the slope 5, falls in the chute 8, and enters an ice storage (not shown).

Referring to FIG. 4, when the cylindrical drum 2 and the rotating shaft 3 rotate around the rotating shaft 3 in accordance with the ice making operation of the drum ice making machine 101, the first refrigerant seal S1, the second refrigerant seal S2, and The third refrigerant seal S3 and the outer peripheral surface 3aa of the rotary shaft 3 contact each other at the same location without changing the contact location. Therefore, as the drum type ice making machine 101 is used, the first refrigerant seal S1, the second refrigerant seal S2, the third refrigerant seal S3, and the outer peripheral surface 3aa of the rotary shaft 3 are gradually changed by friction. It will be shaved.
Further, when wear of the first refrigerant seal S1, the second refrigerant seal S2, the third refrigerant seal S3, and the outer peripheral surface 3aa of the rotary shaft 3 progresses, the sealing between them decreases, and the refrigerant introduction path The refrigerant 11c leaks out of the refrigerant introduction housing 11 or the auxiliary seal housing 12.

Therefore, the first refrigerant seal S1, the second refrigerant seal S2, and the third refrigerant seal S3 are periodically replaced with new ones based on the cumulative operation time of the drum ice making machine 101 or the like.
However, if only the first refrigerant seal S1, the second refrigerant seal S2, and the third refrigerant seal S3 are replaced while the outer peripheral surface 3aa of the rotary shaft 3 is worn, the above-described replaced seal is replaced with the rotary shaft. 3, between the first refrigerant seal S <b> 1, the second refrigerant seal S <b> 2, the third refrigerant seal S <b> 3, and the outer circumferential surface 3 aa of the rotary shaft 3. A sufficient seal cannot be obtained.

Furthermore, referring also to FIG. 5, in the drum type ice making machine 101, the spacer housing 13 is replaced with another second spacer housing 23 when the refrigerant seals S <b> 1, S <b> 2, S <b> 3 are replaced.
The configuration of the second spacer housing 23 is substantially the same as that of the spacer housing 13, but the length in the front-rear direction is different. That is, the length of the spacer housing 13 in the front-rear direction is the length A, and the length of the second spacer housing 23 in the front-rear direction is the length B, but the length B is larger than the length A. That is, length A <length B.
Further, the first refrigerant seals S1 and S21 and the second refrigerant seals S2 and S22 are fixed at the same position with respect to the refrigerant introduction housing 11, and the third refrigerant seals S3 and S23 are fixed to the auxiliary seal housing 12. Are fixed at the same position.
Therefore, the new first refrigerant seal S21, the second refrigerant seal S22, and the third refrigerant seal S23 after the replacement are respectively the first refrigerant seal S1, the second refrigerant seal S2, and the third refrigerant seal before replacement. It contacts the outer peripheral surface 3aa of the rotating shaft 3 at a position different from the refrigerant seal S3.

  Accordingly, by replacing the respective refrigerant seals S1, S2, S3 and the spacer housing 13, the first refrigerant seal S21, the second refrigerant seal S22, and the third refrigerant seal S23 are renewed. And contact with a new surface free of wear on the outer peripheral surface 3aa of the rotary shaft 3. Therefore, the sealing between the refrigerant introduction housing 11 and the auxiliary seal housing 12 and the outer peripheral surface 3aa of the rotary shaft 3 is restored, and the first refrigerant seal S21, the second refrigerant seal S22, and the third refrigerant seal. S23 or the time until the outer peripheral surface 3aa of the rotating shaft 3 is worn and the sealing between them is not maintained, that is, the deterioration speed, is initialized to be the same as when the drum type ice making machine 101 is new. .

  Referring to FIG. 4, when the rotary shaft 3 rotates, the ice making water seal WS1 and the outer peripheral surface 3aa of the rotary shaft 3 come into contact with each other at the same location without changing the contact location. Therefore, as the drum type ice making machine 101 is used, the ice making water seal WS1 and the outer peripheral surface 3aa of the rotary shaft 3 are scraped little by little due to friction. The ice-making water in the ice-making water tank 1 (see FIGS. 1 and 3) moves between the bearing housing 14 and the outer peripheral surface 3aa of the rotary shaft 3 due to the progress of wear of the ice-making water seal WS1 and the outer peripheral surface 3aa of the rotary shaft 3. Leak from. Therefore, the ice making water seal WS1 is periodically replaced with a new one based on the cumulative operation time of the drum ice making machine 101 or the like.

  However, since the component of tap water contained in the ice making water is deposited and adhered to the place where the ice making water seal WS1 contacts the outer peripheral surface 3aa of the rotating shaft 3, if only the ice making water seal WS1 is replaced. The attached ice-making water seal WS1 may be damaged by the deposits. Therefore, a sufficient seal cannot be obtained between the ice-making water seal WS1 and the outer peripheral surface 3aa of the rotary shaft 3.

Therefore, referring also to FIG. 5, in the drum type ice making machine 101, when the ice making water seal WS1 is replaced, the replaced ice making water seal WS2 is disposed in the second groove WG2 of the bearing housing. .
Therefore, the ice making water seal WS2 is renewed by changing the groove in which the ice making water seal WS2 replaced from the ice making water seal WS1 is disposed from the first groove WG1 to the second groove WG2. In addition, the outer peripheral surface 3aa of the rotating shaft 3 comes into contact with a new surface without wear. For this reason, the sealing between the bearing housing 14 and the outer peripheral surface 3aa of the rotary shaft 3 is restored, and the ice making water seal WS2 or the outer peripheral surface 3aa of the rotary shaft 3 is worn, and the sealing between the two is not maintained. The degradation rate is initialized.

  Thus, the drum type ice making machine 101 according to the present invention generates ice from water on the outer peripheral surface 2a of the cylindrical drum 2 that is rotationally driven, and peels off the ice on the outer peripheral surface 2a of the cylindrical drum 2. It is. The drum type ice making machine 101 includes a rotating shaft 3 provided on the cylindrical drum 2 and supporting the cylindrical drum 2, and a refrigerant introduction housing 11 provided around the rotating shaft 3. A refrigerant introduction housing 11 having a first refrigerant seal S1 and a second refrigerant seal S2 that seals between them, and a spacer housing 13 provided around the rotary shaft 3 between the refrigerant introduction housing 11 and the cylindrical drum 2. The spacer housing 13 having different lengths in the axial direction of the rotary shaft 3 is selectively used, so that the position where the first refrigerant seal S1 and the second refrigerant seal S2 are in contact with the rotary shaft 3 is be changed.

  At this time, since the first refrigerant seal S1 and the second refrigerant seal S2 and the rotating shaft 3 are in contact with each other, the first refrigerant seal S1, the second refrigerant seal S2, and the rotating shaft 3 are worn. When this occurs and this wear proceeds, the sealing between the rotating shaft 3 and the refrigerant introduction housing 11 is not maintained. However, by changing the spacer housing 13 to one having a different length, the first refrigerant seal S1 and the second refrigerant seal S2 can come into contact with the non-wearing surface of the rotary shaft 3, and the rotary shaft 3 And the refrigerant introduction housing 11 can be sealed. Therefore, the sealing between the rotating shaft 3 and the refrigerant introduction housing 11 can be maintained with a simple structure that only changes the spacer housing 13.

  In the drum type ice making machine 101, when the spacer housing 13 is changed, the first refrigerant seal S1 and the second refrigerant seal S2 are exchanged. As a result, the newly-replaced first refrigerant seal S21 and second refrigerant seal S22 that are not worn are in contact with the non-wearing surface of the rotary shaft 3, so that the rotary shaft 3 and the refrigerant introduction housing 11 are not in contact with each other. The sealing is more reliable. Also, the time until the first refrigerant seal S21 and the second refrigerant seal S22 and the rotary shaft 3 are worn and the sealing between the rotary shaft 3 and the refrigerant introduction housing 11 is not maintained is reached. Can be stretched.

Further, in the drum type ice making machine 101, the refrigerant introduced into and discharged from the cylindrical drum 2 flows through the rotary shaft 3, and the refrigerant introduction housing 11 introduces the refrigerant into the rotary shaft 3, The refrigerant seal S <b> 1 and the second refrigerant seal S <b> 2 prevent leakage of refrigerant from between the refrigerant introduction housing 11 and the rotating shaft 3.
The drum type ice making machine 101 further includes a bearing housing 14 that rotatably supports the rotary shaft 3 between the spacer housing 13 and the cylindrical drum 2.
Further, in the drum type ice making machine 101, the bearing housing 14 that is closest to the cylindrical drum 2 among the housings has an annular first groove WG1 and second groove WG2 that surround the rotating shaft 3 and are provided apart from each other, An ice making water seal WS1 is provided selectively in one of the first groove WG1 and the second groove WG2. The ice making water seal WS <b> 1 is in contact with the rotary shaft 3 to seal between the bearing housing 14 and the rotary shaft 3, and prevents leakage of ice making water from between the bearing housing 14 and the rotary shaft 3.

  At this time, since the ice making water seal WS1 and the rotating rotating shaft 3 are in contact with each other, the ice making water seal WS1 and the rotating shaft 3 are worn, and when this wear proceeds, the rotating shaft 3 and the bearing housing 14 Ice-making water leaks from between. However, for example, by changing the groove provided with the ice making water seal WS1 from the first groove WG1 to the second groove WG2, the ice making water seal WS1 can come into contact with the non-wearing surface of the rotary shaft 3. The space between the rotary shaft 3 and the bearing housing 14 can be sealed. Therefore, the sealing between the rotating shaft 3 and the bearing housing 14 can be maintained with a simple structure that only changes the position of the ice making water seal WS1.

In the drum type ice making machine 101 according to the embodiment, the spacer housing 13 is replaced with the second spacer housing 23 having a different length when the refrigerant seals S1, S2, and S3 are replaced. It is not a thing. A new spacer housing may be inserted between the auxiliary seal housing 12 and the spacer housing 13 or between the spacer housing 13 and the bearing housing 14.
Further, in the drum type ice making machine 101 of the embodiment, the first groove WG1 and the second groove WG2 are formed as grooves for disposing the ice making water seal WS1, but the present invention is not limited to this. Three or more grooves may be formed.

  In the drum type ice making machine 101 according to the embodiment, the refrigerant is introduced from the refrigeration apparatus to the rotary shaft 3 through the refrigerant introduction housing 11, and the refrigerant is discharged from the refrigerant discharge port 3 f of the rotary shaft 3 to the refrigeration apparatus. However, the present invention is not limited to this and may be reversed. That is, the refrigerant of the refrigeration apparatus may be introduced from the refrigerant discharge port 3 f of the rotating shaft 3, and the refrigerant may be discharged to the refrigeration apparatus via the refrigerant introduction housing 11.

  2 cylindrical drum, 2a outer peripheral surface (surface of cylindrical drum), 3 rotation shaft, 11 refrigerant introduction housing (seal housing), 13 spacer housing, 14 bearing housing (housing closest to the cylindrical drum), 23 second spacer housing, 101 Drum type ice making machine, S1, S21 first refrigerant seal (seal material), S2, S22 second refrigerant seal (seal material), WG1 first groove (groove), WG2 second groove (groove), WS1 ice making water Seal (sealing material for water sealing).

Claims (4)

In a drum type ice making machine that generates ice from water on the surface of a cylindrical drum that is driven to rotate, and peels off the ice on the surface of the cylindrical drum,
A rotating shaft provided on the cylindrical drum and supporting the cylindrical drum;
A seal housing provided around the rotary shaft, the seal housing having a sealing material that comes into contact with the rotary shaft and seals between the rotary shaft;
A spacer housing provided around the rotation axis between the seal housing and the cylindrical drum;
A drum type ice making machine in which a position where the seal material contacts the rotating shaft is changed by selectively using the spacer housing having different lengths in the axial direction of the rotating shaft. Refrigerant introduced and derived from the cylindrical drum flows through the rotating shaft,
The seal housing introduces or leads out a refrigerant with respect to the rotating shaft,
The drum-type ice maker according to claim 1, wherein the sealing material prevents leakage of refrigerant from between the seal housing and the rotating shaft.   The drum type ice making machine according to claim 1 or 2, further comprising a bearing housing that rotatably supports the rotating shaft between the spacer housing and the cylindrical drum. The housing closest to the cylindrical drum among the housings,
At least two annular grooves provided around the rotating shaft and spaced apart from each other;
A sealing material for water sealing that is selectively provided in at least one of the at least two grooves, and seals between the rotating shaft and a housing that is in contact with the rotating shaft and is closest to the cylindrical drum. The drum-type ice making machine according to any one of claims 1 to 3, further comprising a water sealing seal member that prevents leakage of water from between the housing closest to the cylindrical drum and the rotating shaft.

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