JP5441449B2 - Drum ice machine - Google Patents

Description

  The present invention relates to a drum-type ice making machine that obtains ice pieces by immersing and rotating a part of an ice making drum in ice making water stored in an ice making tank, and peeling off the ice formed on the outer surface of the ice making drum with a cutter. It is.

  As a means for generating a large amount of ice pieces, a drum type ice making machine as shown in Patent Document 1 has been proposed. As shown in FIG. 5, the drum ice making machine 10 includes an ice making tank 12 in which ice making water is stored, and a cylindrical ice making machine that is rotatably arranged with a part of the ice making tank 12 immersed in the ice making tank 12. And a drum 14. The ice making tank 12 is formed in a box shape that is surrounded by the front, rear, left and right wall portions and the bottom portion and opens upward, and its upper opening is closed by a plate-like lid member 16. Then, a refrigerant is supplied from the refrigeration system (not shown) into the ice making drum 14, and the ice making drum 14 cooled by the refrigerant rotates in the ice making tank 12, whereby layered ice (ice ice) is formed on the surface (outer surface). It is configured to grow layer I).

  Further, the ice making tank 12 is provided with a cutter 18 in such a manner that the blade edge 18 a is brought close to the outer surface of the ice making drum 14 and is inclined downward as being separated from the ice making tank 12. The lower end of the cutter 18 faces the discharge port 20a of the chute 20 communicating with an ice storage (not shown). A flat slope 22 is formed on the upper surface of the cutter 18 so as to incline downward toward the discharge port 20a. Then, the ice layer I generated on the outer surface of the ice making drum 14 is peeled off by the blade edge 18 a of the cutter 18, and the peeled ice pieces are slid down on the slope 22 of the cutter 18. And the ice piece which slid down the slope 22 is discharge | released to the chute | shoot 20 through the discharge port 20a. Note that the ice pieces discharged to the chute 20 fall inside the chute 20 and are released to the ice storage, and are stored in the ice storage.

JP 2007-33012 A

  By the way, the ice pieces removed by the cutter 18 may be melted on the slope 22 by exchanging heat while sliding down the slope 22. If the melted water of the ice pieces thus melted remains on the slope 22, the ice pieces newly peeled off by the cutter 18 may adhere to the melted water and stop on the slope 22. Then, new ice pieces adhere to the ice pieces remaining on the slope 22 one after another, and a large ice block (hereinafter referred to as abnormal ice A) is accumulated on the slope 22. When the abnormal ice A is generated, the ice pieces are not easily released to the chute 20 and an ice storage abnormality is generated in which the ice pieces are hardly stored in the ice storage, or a large load is applied to the cutter 18 due to the load of the abnormal ice A. This causes the cutter 18 to be deformed or damaged. Further, the abnormal ice A may become large and come into contact with the lid member 16 of the ice making tank 12 to deform or damage the lid member 16 or the like.

  Therefore, in view of the above-mentioned problems inherent in the drum type ice making machine according to the prior art, the present invention has been proposed to suitably solve this problem, and abnormal ice is generated on the cutter. An object of the present invention is to provide a drum type ice making machine capable of detecting.

In order to solve the above problems and achieve the intended purpose, the drum type ice making machine according to the present invention is:
An ice making tank storing ice making water, an ice making drum cooled by a refrigerant from the refrigeration system and rotating around a horizontal axis while partly immersed in the ice making water in the ice making tank, and a cutting edge on the outer surface of the ice making drum There Rutotomoni is arranged to close, and lower inclined as to separate from the ice drum, and a cutter strip the ice generated in the outer surface, the stripped ice pieces in the cutter of the cutter In a drum type ice maker that slides down the upper surface and discharges it to an ice storage,
A detection made of a thin plate material that is provided above the cutter in the ice making water tank and is inclined downward along the upper surface of the cutter, and is elastically deformed by being pushed up by abnormal ice formed on the upper surface of the cutter. An abnormality detection means comprising a member and a sensor unit that is positioned above the detection member and detects the detection member pushed up by the abnormal ice;
The detection member made of the thin plate material is formed so as to bend downward and tilt downward along a first folding line along the axial direction of the ice making drum, and the first folding curve is forward of the cutting edge of the cutter. It is set so that it may be located in .
According to the first aspect of the present invention, since the abnormality detecting means is provided above the cutter, abnormal ice can be detected. Therefore, if the ice making operation is stopped after detecting abnormal ice, abnormal ice growth can be stopped at an early stage, and the maintenance costs can be reduced by preventing the cutter and ice making tank from being deformed or damaged. It can be planned.

In the drum type ice making machine according to claim 2 , the abnormality detecting means is located on the ice making drum side from the blade edge of the cutter and extends downward, and the ice pieces peeled off by the cutter are accumulated on the ice making drum side. It was equipped with an ice return prevention member that prevents it.
According to the invention of claim 2 , since the ice return preventing member is provided in the abnormality detecting means, the ice pieces peeled off by the cutter are not released to the ice storage due to the abnormal ice and become the ice making drum side. A large amount of accumulation can be prevented. Therefore, since many ice pieces are accumulated on the ice making drum side, it is possible to prevent problems and failures in the ice making drum and troubles in ice making operation.

In the drum type ice making machine according to claim 3 , the detection member and the ice return prevention member are formed as separate members, and the detection member includes a first contact surface portion fixed to the ice making tank via the first fixing portion. The ice return preventing member includes a second contact surface portion fixed to the ice making tank via the second fixing portion and in surface contact with the first contact surface portion from above.
According to the invention of claim 3 , by making the detection member and the ice return prevention member separately, it is possible to prevent the ice return prevention member from being deformed when the detection plate is elastically deformed. In addition, since the ice contact prevention member and the detection member are fixed to the ice making tank by bringing the second contact surface portion into surface contact from above the first contact surface portion, the load of abnormal ice pushing up the detection plate is applied to the first contact. It can disperse | distribute to a 2nd contact surface part via a contact surface part. That is, it is possible to prevent the load of abnormal ice from being concentrated on the first fixing portion that fixes the first abutting surface portion to the ice making tank, and to prevent the first fixing portion from being deformed or damaged. It becomes possible.

  According to the drum type ice making machine of the present invention, abnormal ice generated on the cutter can be detected.

It is a longitudinal cross-sectional view which shows the principal part of the drum type ice making machine which concerns on an Example. It is a disassembled perspective view which shows the ice making tank in an Example. (a) is an enlarged vertical sectional view showing a state before abnormal ice contacts the detection plate, and (b) is an enlarged vertical sectional view showing a state where abnormal ice is in contact with the detection plate and elastically deformed upward. is there. (a) is an enlarged vertical sectional view showing an abnormality detection means of an example, and (b) is an enlarged vertical sectional view showing an abnormality detection means as a comparative example. It is a longitudinal cross-sectional view which shows the principal part of the conventional drum type ice making machine.

  Next, the drum type ice making machine according to the present invention will be described below with reference to the accompanying drawings, taking a preferred embodiment. In the following description, “upper”, “lower”, “left”, and “right” are designated with reference to FIG. In addition, the same members as those described in the related art will be described with the same reference numerals.

  As shown in FIG. 1, the drum ice making machine 30 according to the embodiment includes an ice making tank 12 storing a predetermined amount of ice making water, and a horizontal axis in a state where a part of the ice making water is immersed in the ice making water inside the ice making tank 12. And a cylindrical ice making drum 14 rotatably disposed around. The ice making tank 12 is formed in a box shape whose upper part is opened by front and rear wall parts (front wall part 32, rear wall part 34, left wall part 36 and right wall part 38) and a bottom part 39, and an upper opening thereof is The lid member 16 is openable and closable. The rear wall portion 34 of the ice making tank 12 is provided with a water supply port 40 connected to a water supply pipe (not shown) derived from the external water system, and the water supply port 40 is provided inside the ice making tank 12 through the water supply pipe. Ice-making water (tap water) is supplied from. In addition, a water level sensor 42 such as a float switch for detecting the amount of ice making water stored (water level) is disposed inside the ice making tank 12, and the amount of ice making water supplied according to the water level detection status by the sensor 42. Is controlled to keep the water level in the ice making tank 12 constant.

  On the right side of the ice making tank 12, a chute 20 that extends vertically and communicates with an ice storage (not shown) provided below the ice making tank 12 is disposed. The chute 20 and the ice making tank 12 are: The chute 20 communicates with the upper left side of the chute 20 through a discharge port 20a. In the ice making tank 12, a cutter 18 having a blade edge 18 a facing the outer surface exposed from the ice making water of the ice making drum 14 is disposed between the front and rear wall portions 32 and 34 of the ice making tank 12. (See FIG. 2). When the ice making drum 14 is rotated in the ice making operation, the cutter 18 bumps into the ice layer I generated on the outer surface of the ice making drum 14 and is peeled off to obtain ice pieces. The upper surface of the cutter 18 is composed of a slope 22 that inclines downward as it moves away from the ice making drum 14. The lower end edge of the slope 22 faces the discharge port 20a, and the ice pieces peeled off by the cutter 18 slide down on the slope 22 and are discharged from the discharge port 20a to the chute 20.

  As shown in FIG. 2, plate-like side guides having a required thickness along the front and rear edges of the cutter 18 are respectively provided inside the front wall portion 32 and the rear wall portion 34 of the ice making tank 12. 44 and 44 are provided, and the ice pieces peeled off by the cutter 18 are guided by the side guides 44 and 44 so that the ice pieces can be reliably guided to the chute 20. As shown in FIG. 2, a pair of screw holes 46 a and 46 a are provided on the upper end surface of each side guide 44 so as to be separated from each other in the left-right direction.

  Above the cutter 18 in the ice making tank 12, an abnormality detecting means 48 for detecting abnormal ice A on the cutter 18 (slope 22) is provided. The abnormality detection means 48 includes a detection member 50 that is pushed up by the abnormal ice A formed on the slope 22 of the cutter 18 and elastically deforms, and an ice return prevention member that prevents the ice pieces from accumulating on the ice making drum 14 side. 52 and a sensor portion 54 that detects the elastically deformed detection member 50 (a detection plate 56 described later).

  The detection member 50 is formed by bending a rectangular thin plate material downward along a first folding line (folding line) B along the axial direction (front-rear direction) of the ice making drum 14, and the detection member 50 is formed by the cutter. 18 is arranged so as to cover the upper part of 18. The detection member 50 extends horizontally from the first folding line B to the right side (side away from the ice making tank 12) and horizontally from the first folding line B to the left side (ice making tank 12 side). And a first contact surface portion 58. As shown in FIG. 3 (a), the detection plate 56 always inclines downward substantially parallel to the cutter 18, and when the abnormal ice A accumulated on the cutter 18 comes into contact and is pressed, As shown in FIG. 3 (b), it is elastically deformed upward with the first folding line B as an axis.

  The first contact surface portion 58 is formed in a rectangular plate shape extending in the front-rear direction, and the length of the first contact surface portion 58 is slightly longer than the distance between the inner surfaces of the side guides 44, 44. Set to small dimensions. Further, first mounting pieces (first fixing portions) 60 and 60 projecting outward are formed on the front and rear edges of the first contact surface portion 58, respectively. Each first mounting piece 60 is set to extend to the left and right by a required length, and the lower surface of the first mounting piece 60 is in contact with the upper surface of the side guide 44. In addition, a pair of through holes 60 a, 60 a are formed in the first mounting piece 60 so as to be separated from each other on the left and right, and when the first mounting piece 60 faces the upper surface of each side guide 44, the first mounting piece 60 The 60 through holes 60 a are vertically aligned with corresponding screw holes 46 a provided in the side guide 44.

  The ice return prevention member 52 is formed by bending a rectangular thin plate material downward at a substantially right angle along a second folding line C along the axial direction of the ice making drum 14, and is constituted by a member different from the detection member 50. ing. The ice return preventing member 52 includes a restriction plate 62 extending downward from the second folding curve C, and a second abutting surface portion extending from the second folding curve C to the right side (side away from the ice making drum 14). 64. The restriction plate 62 is further bent downward and obliquely downward to the right via a third fold line D that is parallel to the second fold line C (front-rear direction). The restriction plate 62 is formed from a cutting edge 18 a of the cutter 18. It is located on the ice making drum 14 side (left side) (see FIG. 1).

  The second abutment surface portion 64 is formed in a rectangular plate shape similar to the first abutment surface portion 58, and the length of the second abutment surface portion 64 is between the inner side surfaces of both side guides 44, 44. The dimensions are slightly smaller than the distance. Further, second mounting pieces (second fixing parts) 66 and 66 having substantially the same shape as the first mounting piece 60 are formed on the front and rear edges of the second contact surface part 64 so as to protrude outward. Yes. A pair of through holes 66a and 66a corresponding to the through holes 60a and 60a of the first mounting piece 60 are formed in each second mounting piece 66 so as to be separated from each other in the left and right directions.

  As shown in FIG. 2, the ice return prevention member 52 is assembled to the detection member 50 by bringing the second contact surface portion 64 into surface contact from above the first contact surface portion 58. That is, the first mounting pieces 60, 60 are made to face the upper surfaces of the side guides 44, 44, and the second contact surface portion 64 is contacted with the first contact surface portion 58 from above, thereby 66 are aligned on the first mounting pieces 60, 60. Then, the screw holes 46a of the side guide 44 and the through holes 60a, 66a of the first and second mounting pieces 60, 66 are arranged vertically. Then, by screwing a screw 68 from above into the screw hole 46a of the side guide 44 through both the through holes 60a, 66a, the first contact surface portion 58 and the second contact surface portion 64 are in surface contact with each other, The detection member 50 and the ice return prevention member 52 are fixed to both side guides 44 and 44 (ice making tank 12). And the detection member 50 which concerns on an Example is set so that the 1st folding line B may be located in the ice-making drum 14 side (left side) rather than the blade edge 18a of the cutter 18 in the state attached to the side guide 44 ( (See FIG. 4 (a)).

  The sensor unit 54 is attached so as to slightly protrude downward from the lower surface of the lid member 16. When the detection plate 56 is elastically deformed upward and contacts the sensor unit 54, the sensor unit 54 moves the detection plate 56. It comes to detect. That is, the sensor unit 54 of the embodiment employs a contact sensor that can be detected when the detection plate 56 contacts. The sensor unit 54 is electrically connected to a control means (not shown) for controlling the operation of the drum type ice making machine 30, and the sensor unit 54 controls the detection signal when the detection plate 56 comes into contact. Is sent to the means. And the control means which received the detection signal from the sensor part 54 determines with the abnormal ice A having generate | occur | produced, and performs control which stops the driving | operation of the drum type ice making machine 30. FIG.

  The ice making drum 14 is formed with a rotating shaft 72 extending outward from the center of each end face in the axial direction. The ice making drum 14 has the rotating shaft 72 extending from the front and rear walls 32 and 34 of the ice making tank 12. Are arranged horizontally in a state of being supported by bearings 74 provided on the front side (in FIG. 2, only the front rotary shaft 72 and the bearing 74 are shown). The ice making drum 14 is connected in communication with a refrigeration system (not shown) via a connecting portion 76 of a rotating shaft 72 protruding from the front wall portion 32 of the ice making tank 12, and refrigerant or brine is supplied from the refrigeration system to the ice making drum. 14 to cool the ice making drum 14 from the inside. Further, the ice making drum 14 is connected such that a rotating shaft protruding outward from the rear wall portion 34 of the ice making tank 12 is connected to the drive mechanism M via a transmission means, and the ice making drum 14 is rotated by the drive mechanism M. It has become.

(Operation of Example)
Next, the operation of the drum type ice making machine 30 according to the embodiment will be described. When the abnormality detecting means 48 is assembled to the ice making tank 12, the first mounting pieces 60, 60 of the detecting member 50 are brought into contact with the upper surfaces of the side guides 44, 44, and the through holes 60a of the first mounting piece 60 are connected to the side guides. The upper and lower screw holes 46a are aligned vertically. Next, the ice return prevention member 52 is assembled so as to overlap the detection member 50, and the second contact surface portion 64 is contacted from above the first contact surface portion 58. Then, each 2nd attachment piece 66 surface-contacts the 1st attachment piece 60 from the top, and each through-hole 60a, 66a of both the 1st, 2nd attachment pieces 60 and 66 aligns up and down. Then, the screw 68 is screwed into the screw hole 46a of the side guide 44 through both the through holes 60a and 66a, and the detection member 50 and the ice return preventing member 52 are installed between the side guides 44 and 44 (see FIG. 2). ).

  Here, the contact area with the upper surface of the side guide 44 is ensured by the 1st attachment piece 60 being comprised so that it may extend by the required length on either side. In addition, each of the first mounting piece 60 and the second mounting piece 66 includes two through holes 60a, 60a, 66a, 66a, and is configured to be screwed to the side guide 44 by two screws 68, 68. It has become. Therefore, the detection member 50 and the ice return prevention member 52 are securely fixed to the side guides 44, 44, and both the members 50, 52 can be firmly assembled. Next, the sensor unit 54 is attached to the lower surface of the lid member 16, and the lid member 16 is disposed so as to close the upper opening of the ice making tank 12. Then, as shown in FIG. 1, the detection plate 56 of the detection member 50 is arranged in a posture inclined downward above the cutter 18.

  When the ice making operation of the drum type ice making machine 30 is started, a refrigerant (or brine) is supplied from the refrigeration system to the ice making drum 14 and the ice making drum 14 rotates to gradually form an ice layer on the outer surface of the ice making drum 14. I is formed. Then, the ice layer I is peeled off by the blade edge 18a of the cutter 18, and the ice piece slides down the upper surface (slope 22) of the cutter 18. The ice pieces sliding down the slope 22 are discharged to the chute 20 through the discharge port 20a and stored in the ice storage below.

  Next, a case where abnormal ice A occurs on the slope 22 will be described. As shown in FIG. 3A, when abnormal ice A is generated on the slope 22, pieces of ice adhere to each other, and the abnormal ice A grows in a mountain shape. When the abnormal ice A reaches the lower surface of the detection plate 56, the detection plate 56 is pushed up by the abnormal ice A and elastically deforms upward with the first folding line B as an axis. At this time, the first contact surface 58 receives an upward load due to the force that the abnormal ice A pushes up the detection plate 56. Then, the load applied to the first contact surface portion 58 is transmitted to the second contact surface portion 64 that is in surface contact with the first contact surface portion 58, and the load is distributed to the second contact surface portion 64. That is, by adopting a configuration in which the second contact surface portion 64 is contacted from the upper side of the first contact surface portion 58, the load due to the abnormal ice A is concentrated on the first mounting pieces 60, 60 via the detection plate 56. The first mounting pieces 60, 60 can be prevented from being deformed or broken.

  Here, when the detection member 50 and the ice return prevention member 52 are integrated, when the detection plate 56 is elastically deformed upward, the ice return prevention member 52 side is fixed to the side guides 44 and 44 ( There is a possibility that the first mounting piece 60 and the second mounting piece 66) may be bent (rotated) downward. When the ice return preventing member 52 is bent downward, the regulating plate 62 comes into contact with the outer surface of the ice making drum 14, causing failure or damage to the ice making drum 14 or the ice return preventing member 52. However, in the drum type ice making machine 30 according to the embodiment, the detection member 50 and the ice return prevention member 52 are configured as separate members, so that even if the detection plate 56 is elastically deformed, the ice return prevention member 52 is curved together. In other words, the regulation plate 62 can be prevented from coming into contact with the ice making drum 14.

  When the detection plate 56 is further elastically deformed upward by the abnormal ice A and the detection plate 56 comes into contact with the sensor unit 54, the sensor unit 54 is activated to send a detection signal to the control means. Then, the control means determines that the abnormal ice A has occurred, and stops the ice making operation of the drum type ice making machine 30. Thus, according to the drum type ice making machine 30 according to the embodiment, the abnormal ice A can be detected by the abnormality detecting means 48, so that the lid member 16 and the like can be prevented from being deformed or damaged. . In addition, since the abnormality detection means 48 of the embodiment has a very simple configuration including the detection member 50 and the ice return prevention member 52, the product cost can be reduced, the occurrence of failures and malfunctions can be reduced, and the maintenance cost can be reduced. Can be suppressed. Since the abnormality detecting means 48 of the embodiment includes the ice return preventing member 52, the ice pieces that are not discharged to the chute 20 due to the abnormal ice A are obstructing the ice making drum 14 side (the water level sensor 42 side). ) Is prevented, and it is possible to prevent the ice making drum 14 from being troubled by the ice pieces and the ice making operation from being hindered.

  Here, FIGS. 4A and 4B are diagrams comparing the detection members 50 and 70 in which the position of the first folding line B is different on the left and right. FIG. 4A shows a detection member 50 of the embodiment, and FIG. 4B shows a detection member 70 as a comparative example. In the comparative example of FIG. 4B, the members other than the detection member 70 have the same configuration as that of the embodiment, so that each member is denoted by the same reference numeral as that of the embodiment. As shown in FIG. 4B, the detection member 70 of the comparative example has the first folding line B biased to the right from the detection member 50 of the embodiment, and is located on the right side of the cutting edge 18a of the cutter 18. Then, in the detection member 70 according to the comparative example, the peak of the abnormal ice A is formed on the left side of the first folding line B, and the abnormal ice A comes into contact with the first contact surface portion 58 to detect the abnormal ice A. There is a risk that it will not be possible. Therefore, in the detection member 50 according to the embodiment, as shown in FIG. 4A, the first folding line B is set to be located on the left side of the cutting edge 18 a of the cutter 18. Thereby, the peak of the abnormal ice A can be reliably brought into contact with the detection plate 56, and the abnormal ice A can be detected reliably.

  It should be noted that the left and right extending lengths of the detection plate 56 can be secured by biasing the position of the folding line B toward the ice making drum 14, and the detection plate 56 is compared with the detection member 70 of FIG. The load necessary for the elastic deformation of can be reduced. Therefore, the load applied to the first mounting pieces 60, 60 and the like can be relatively reduced, and these members can be prevented from being deformed or damaged. When the abnormal ice A is not pushed up to the detection plate 56, the abnormal ice A is guided to the chute 20 side by the detection plate 56 and has a function of removing the abnormal ice A from the slope 22.

The drum type ice making machine according to the present invention is not limited to the above-described embodiment, and the following modifications are possible.
(1) In the embodiment, the detection plate is elastically deformed to detect abnormal ice. However, for example, the abnormal ice may be detected when the abnormal ice comes into contact with a sensor or the like. Further, the detection member does not necessarily have a plate shape (detection plate), and for example, a linear or belt-like detection member that can be elastically deformed may be provided.
(2) In the embodiment, the sensor unit is a contact sensor. However, for example, a proximity switch that detects the detection plate in a non-contact manner or a switch type sensor unit that is pressed by the detection plate may be employed.
(3) In the embodiment, the slope is provided on the upper portion of the cutter. However, for example, the upper surface of the cutter may be a smooth surface capable of guiding ice pieces, and the slope may be omitted.
(4) In the embodiment, the detection member and the ice return prevention member are configured separately, but may be integrated. It is also possible to omit the ice return prevention member.
(5) In the embodiment, after detecting the abnormal ice, the control means performs control to stop the ice making operation. However, for example, an alarm lamp or a buzzer for notifying the occurrence of abnormal ice may be operated.
(6) In the embodiment, each of the first and second mounting pieces is provided with two through holes and fixed to the side guide with two screws. However, each of the first and second mounting pieces has a through hole. One by one may be provided and fixed with one screw.

DESCRIPTION OF SYMBOLS 12 Ice making tank, 14 Ice making drum, 18 Cutter, 18a Cutting edge 22 Slope (upper surface), 48 Abnormality detection means, 50 Detection member 52 Ice return prevention member, 54 Sensor part, 58 1st contact surface part 60 1st attachment piece (1st 1 fixed portion), 64 second contact surface portion,
66 Second mounting piece (second fixed part), A abnormal ice, I ice layer (ice)

Claims (3)

An ice making tank (12) storing ice making water, and an ice making drum (14) which is cooled by a refrigerant from the refrigeration system and rotates around a horizontal axis in a state where a part of the ice making water is immersed in the ice making water in the ice making tank (12). the disposed to the cutting edge on the outer surface of the ice making drum (14) (18a) are close Rutotomoni, and inclined downward as it separates from the ice drum (14), ice generated on the outer surface of (I A drum-type ice making machine that discharges ice pieces removed by the cutter (18) to the ice storage by sliding down the upper surface (22) of the cutter (18).
Above the cutter (18) in the ice making water tank (12) and provided to be inclined downward along the upper surface (22) of the cutter (18), and on the upper surface (22) of the cutter (18). The detection member (50) made of a thin plate material that is elastically deformed by being pushed up by the abnormal ice (A) formed on, and located above the detection member (50) and pushed up by the abnormal ice (A) An abnormality detection means (48) comprising a sensor part (54) for detecting the detection member (50),
The detection member (50) made of the thin plate material is formed so as to bend downward and incline downward along a first folding line (B) along the axial direction of the ice making drum (14). The drum type ice making machine, wherein the curve (B) is set to be positioned forward of the cutting edge (18a) of the cutter (18) . The anomaly detection means (48) is located on the ice making drum (14) side from the cutting edge (18a) of the cutter (18) and extends downward, and the ice pieces peeled off by the cutter (18) drum (14) according to claim 1 Symbol placement with ice return prevention member prevent from being accumulated to the side (52) drum type ice making machine. The detection member (50) and the ice return prevention member (52) are formed as separate members, and the detection member (50) is fixed to the ice making tank (12) via the first fixing portion (60, 60). A first abutment surface portion (58) is provided, and the ice return prevention member (52) is fixed to the ice making tank (12) via a second fixing portion (66, 66) and the first abutment surface portion (58). The drum type ice making machine according to claim 2, further comprising a second contact surface portion (64) in surface contact from above.

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