JP2010043771A - Water spray pipe for falling type ice-making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water spray pipe for a falling type ice-making machine capable of suppressing generation of turbulence by straightening ice-making water and uniformly supplying ice-making water from water spray holes. <P>SOLUTION: The water spray pipe 22 includes a pipe body 24 arranged to extend above an ice-making part and having a flowing region 38 of the ice-making water defined inside and one end communicated with a discharge port of a circulation pump 30; and with the plurality of water spray holes 26 arranged on the lower face of the pipe body 24 in the extending direction. A throttle part 40 projecting from the inner face of the pipe body 24 to the flowing region 38 side and locally narrowing the flowing region 38 is provided upstream of the most upstream water spray hole 26 on the upper face of the pipe body 24. A semicircular throttle part 42 is formed downstream from the throttle part 40 of the pipe body 24. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water spray pipe for a flow-down type ice maker, and more particularly to a water spray pipe for a flow-down type ice maker disposed above the ice making section and supplying ice making water to the ice making section through a water spray hole. It is.

  As an automatic ice maker that manufactures ice continuously, it has an ice making unit consisting of a pair of ice making plates, and the ice making surface of each ice making plate is cooled by a refrigerant supplied to an evaporation pipe disposed between both ice making plates. A flow-down type ice making machine is known (see Patent Document 1). The schematic configuration of this flow-down type ice maker will be briefly described below. A plurality of partition members are arranged on the ice making surface of the ice making unit, and an ice making region extending in the vertical direction is defined between adjacent partition members. It is made. A water sprinkling pipe having a plurality of water sprinkling holes is disposed above the ice making section, and ice making water stored in an ice making water tank and sucked up by a circulation pump is supplied to each ice making region through the water sprinkling holes. It is like that.

The water sprinkling pipe includes a long pipe main body having an ice-making water circulation region therein and a plurality of water sprinkling holes provided on the lower surface of the pipe main body. One end side of the pipe body is bent downward substantially at a right angle to form a curved portion, and a connecting portion is formed at an open end of the pipe body extending downward from the curved portion. This connection part is connected to the discharge port of the circulation pump via a connecting pipe. In the ice making operation, the ice making water stored in the ice making water tank is sucked up by the circulation pump and flows into the pipe body from the connecting portion. The ice making water that has flowed into the pipe body is jetted from the respective water spray holes to the ice making portion below while flowing through the flow area.
JP-A-7-305928

  By the way, the ice making water flowing through the distribution area of the watering pipe has a large water pressure and a large flow velocity on the side of the connecting portion close to the circulation pump. Further, the flow direction of the ice making water is forcibly changed when passing through the curved portion. For this reason, the ice making water flowing through the water sprinkling pipe tends to be turbulent on the side close to the circulation pump, and the ice making water may not be uniformly supplied especially at the water sprinkling hole on the upstream side near the curved portion. Moreover, if the flow rate of the ice making water is high, the inside of the circulation region becomes negative pressure, and external air may be sucked through the water spray holes. For this reason, fine bubbles are mixed in the ice making water supplied to the ice making section, which causes white cloudy ice and irregular shaped ice to be produced.

  Therefore, the present invention has been proposed to solve this problem in view of the above-mentioned problems inherent in the prior art, and suppresses the occurrence of turbulent flow in the water sprinkling pipe, thereby making ice making from each water sprinkling hole. An object of the present invention is to provide a watering pipe for a flow-down type ice making machine capable of supplying water uniformly.

In order to solve the above-described problems and achieve the desired purpose suitably, the watering pipe of the flow-down type ice making machine according to the present invention is:
A pipe body arranged to extend above the ice making unit and communicated with the discharge port of the pump, and the ice making water discharged from the discharge port of the pump circulates; A plurality of water spray holes that are spaced apart in the extending direction of the main body, and a flow-down type that supplies ice making water that is sucked up by the pump and circulates in the pipe main body to the ice making unit through the water spray holes In the sprinkler pipe of the ice machine,
The pipe body is characterized in that a throttle portion is provided on the upstream side of the water sprinkling hole located at the uppermost stream so as to protrude from the inner surface of the pipe body and locally narrow the flow area of the ice making water.
According to the first aspect of the present invention, since the throttle part for locally narrowing the circulation region is provided, it is possible to suppress the flow speed of the ice making water flowing through the watering pipe. Further, when passing through the throttle portion, the circulation area is expanded, and the ice making water is circulated at a constant low speed. Therefore, it is possible to suppress the turbulent flow of the ice making water on the upstream side of the sprinkling pipe, and the ice making water can be supplied uniformly from all the water sprinkling holes. Further, by suppressing the flow rate of the ice making water, it is possible to prevent the occurrence of air stagnation or the like particularly in the upstream sprinkling holes, thereby suppressing the generation of cloudy ice or deformed ice.

In the sprinkling pipe of the flow-down type ice making machine according to claim 2, the pipe body protrudes from the inner surface of the pipe body on the downstream side of the throttling portion to locally narrow the flow area of the ice making water. Is provided.
According to the invention of claim 2, since the second throttle part is provided on the downstream side of the throttle part, the ice making water can be decelerated in multiple stages, and the turbulent flow of the ice making water can be more reliably suppressed. .

In the watering pipe of the flow-down type ice making machine according to claim 3, the second throttle portion is provided so as to be positioned above the watering hole, and is formed in a semicircular shape that curves from the upstream side toward the downstream side. The
According to the invention of claim 3, since the second throttle portion has a semicircular shape that curves from the upstream side to the downstream side above the watering hole, the flow rate of the ice making water can be suppressed. In addition, the second throttle portion curved toward the water spray hole can send ice-making water to the water spray hole, thereby preventing the occurrence of air stagnation.

In the water spray pipe of the flow-down type ice making machine according to claim 4, the second throttle part is provided so as to be positioned above the water spray hole, and the upstream surface is inclined toward the corresponding water spray hole and downstream. The side surface is curved so as to be inclined toward the upper surface of the pipe body at a gentler inclination angle than the upstream surface.
According to the invention of claim 4, the second throttle portion is curved so that the upstream surface is inclined toward the water spray hole and the downstream surface is gently inclined upward. The flow rate of the ice making water can be suppressed on the upstream side of the throttle portion. Further, the ice-making water can be sent toward the sprinkling holes by the upstream side surface, and the occurrence of air stagnation can be prevented.

The sprinkling pipe of the flow-down type ice making machine according to claim 5, wherein the second throttle part is provided so as to be located between the throttle part and the adjacent watering hole or between the watering holes adjacent to each other, and the pipe It is a pair of side restricting portions that protrude from the side surface of the main body to face each other.
According to the invention of claim 5, since the side throttle portion is provided as the second throttle portion, the flow rate of the ice making water can be suppressed. Further, since the ice making water is pressurized in a balanced manner from both sides of the pipe body by the side restricting portion, it is possible to make it difficult for the ice making water flow direction to be disturbed.

In the sprinkling pipe of the flow down type ice making machine according to claim 6, the second throttle portion is provided so as to be positioned above the sprinkling hole, and hangs down from the upper part of the inner surface of the pipe body toward the corresponding sprinkling hole. It is a conical throttle part.
According to the invention of claim 6, since the conical throttle part is provided as the second throttle part, the flow rate of the ice making water can be suppressed. Further, since the conical throttle portion hangs down toward the sprinkling hole, ice-making water can be sent toward the sprinkling hole by the conical throttling portion, and the occurrence of air stagnation can be prevented. Furthermore, since the ice making water adhering to the conical throttle portion at the end of the ice making operation falls along the side surface, the water can be drained smoothly.

In the sprinkling pipe of the flow-down type ice making machine according to claim 7, the throttle portions are provided on the upper surface of the pipe body so as to be separated from each other in a direction orthogonal to the extending direction of the pipe body, and downward from the inner surface of the pipe body. A plurality of guide protrusions extending in the extending direction of the pipe body in a protruding state are provided.
According to the invention of claim 7, the flow velocity of the ice making water can be further suppressed by the guide projection. Further, the ice making water can be guided by the guide protrusions extending in the extending direction of the pipe body, and the ice making water can be oriented.

In order to solve the above-described problems and achieve the intended purpose suitably, the watering pipe of the flow-down ice maker according to another invention is:
A pipe body arranged to extend above the ice making unit and communicated with the discharge port of the pump, and the ice making water discharged from the discharge port of the pump circulates; A plurality of water spray holes that are spaced apart in the extending direction of the main body, and a flow-down type that supplies ice making water that is sucked up by the pump and circulates in the pipe main body to the ice making unit through the water spray holes In the sprinkler pipe of the ice machine,
The pipe body is provided with a decompression rectification unit having a hemispheric decompression space that protrudes upward from the inner surface of the pipe body and locally expands the flow area of the ice making water on the upstream side of the water spray hole located at the uppermost stream. It is characterized by being able to.
According to the invention of claim 8, the ice making water is depressurized by flowing through the decompression space, and the flow speed of the ice making water can be suppressed. Thereby, the turbulent flow of the ice making water hardly occurs, and the ice making water can be supplied uniformly from all the water spray holes.

  According to the watering pipe of the flow down type ice making machine according to the present invention, it is possible to suppress the generation of turbulent flow of ice making water flowing through the watering pipe and supply ice making water uniformly from all the watering holes.

  Next, the watering pipe of the flow-down type ice making machine according to the present invention will be described below with reference to the accompanying drawings by giving a preferred embodiment.

  FIG. 1 is a schematic diagram illustrating an overall configuration of a falling ice maker 10 provided with a watering pipe 22 according to the first embodiment. The flow-down type ice making machine 10 includes a pair of ice making plates 12 (only one ice making plate 12 is shown in FIG. 1) arranged to face each other, and an ice making unit 14 is formed between both ice making plates 12 from a refrigerating system (not shown). The evaporating pipe 16 to be led out is arranged in a meandering manner. A plurality of partition members 18 extending in the vertical direction are provided on the surface (ice making surface) of the ice making plate 12 at a predetermined interval in the left and right directions, and ice making for producing ice blocks between the adjacent partition members 18 and 18 is performed. Region 20 is defined.

  As shown in the longitudinal cross-sectional view of FIG. 2, the sprinkling pipe 22 for supplying ice making water to the ice making unit 14 is provided on the lower surface of the pipe body 24 and a pipe body 24 extending horizontally above the ice making unit 14. And a plurality of water spray holes 26. On one end side (upstream side) of the pipe body 24, a curved portion 28 that is curved at a substantially right angle is formed. An opening end (one end) directed downward from the curved portion 28 is formed with a connecting portion 34 connected to a discharge port (not shown) of a circulation pump (pump) 30 described later via a connecting pipe 32. . The other end of the pipe body 24 is closed to form a closed end 36.

  Inside the pipe body 24, a circulation region 38 is formed in which ice-making water flows from the connecting portion 34 side (one end side) to the closed end 36 side (the other end side), and the ice-making water is supplied to the circulation pump. 30 circulates through the flow area 38 at a predetermined water pressure. A plurality of the water sprinkling holes 26 are provided at regular intervals in the extending direction of the pipe body 24 so as to supply the ice making water to the corresponding ice making regions 20, and the ice making water flowing through the flow region 38 passes through the water sprinkling holes 26. Via the ice making unit 14. The sprinkling holes 26 are provided in two rows on the lower surface of the pipe body 24 so as to correspond to the pair of ice making plates 12 in a direction perpendicular to the extending direction of the pipe body 24 (hereinafter referred to as the width direction). (See FIG. 2 (c)). An installation recess 25 for positioning a deicing water supply pipe 44 described later is provided in the lower surface of the pipe body 24. As shown in FIG. 2 (c), the installation recess 25 extends so as to be positioned between the water spray holes 26, 26 aligned in the width direction of the pipe body 24, and the lower surface of the pipe body 24 is the installation recess 25. The flow area 38 is slightly narrowed by being pushed up by the pressure.

  As shown in FIGS. 2 (a) and 2 (b), on the upper surface of the pipe body 24 and upstream of the most upstream sprinkling hole 26, a flow region 38 is locally projected from the inner surface of the pipe body 24. A constricted portion 40 is provided. The throttle portion 40 is formed by recessing the upper surface of the pipe body 24 at a predetermined depth. As shown in FIG. 2B, the throttle portion 40 is one step lower than the upper surface of the pipe body 24. And a bottom surface 40a parallel to the flow direction of the ice making water. Further, a second throttle portion 42 is provided on the upper surface of the pipe body 24 downstream of the throttle portion 40. Similar to the throttle portion 40, the second throttle portion 42 protrudes from the upper surface of the pipe body 24 toward the flow region 38 and narrows the flow region 38. As shown in FIG. 2B, the cross-sectional shape of the second throttle part 42 is formed in a semicircular shape that curves from the upstream side to the downstream side (hereinafter referred to as a semicircular throttle part 42). . The semicircular throttling portion 42 is disposed so as to be located above the most upstream water spray hole 26. That is, the lowermost end (top portion) of the semicircular throttle portion 42 is disposed above the water spray hole 26. As described above, in the first embodiment, the flow area 38 is narrowed in two stages by the throttle part 40 and the semicircular throttle part 42, thereby preventing the turbulent flow of the ice making water. Yes. As shown in FIG. 1, a deicing water supply pipe 44 that supplies normal temperature water (deicing water) to the back surface of the ice making plate 12 during the deicing operation is positioned in the installation recess 25 on the lower surface of the sprinkling pipe 22. It is fixed in the state.

  An ice making water tank 46 that opens upward and stores ice making water is provided below the ice making unit 14. A discharge port 46a is provided at the bottom of the ice making water tank 46, and a suction pipe 48 of the circulation pump 30 is connected to the discharge port 46a. Further, the connecting pipe 32 is led out from the discharge port of the circulation pump 30, and the connecting pipe 32 is connected to the connecting portion 34 as described above. The ice making water in the ice making water tank 46 is sent to the sprinkling pipe 22 via the suction pipe 48 and the connecting pipe 32 by the circulation pump 30. It should be noted that the ice making water supplied to the ice making unit 14 that has not been frozen in the ice making unit 14 falls from the ice making unit 14 to the ice making water tank 46 and is collected and supplied to the circulation supply. Is done.

(Operation of Example 1)
Next, the operation of the watering pipe 22 according to the first embodiment will be described. During the ice making operation, the refrigerant is circulated and supplied from the refrigeration system to the evaporation pipe 16, and the circulation pump 30 is operated to suck up the ice making water in the ice making water tank 46 through the suction pipe 48. The ice making water sucked up from the ice making water tank 46 is sent upward through the connecting pipe 32 and arrives at the connection portion 34 of the water sprinkling pipe 22. Then, the ice making water flows into the water sprinkling pipe 22 through the connecting portion 34 and is forced to be changed in the horizontal direction at the curved portion 28. Then, by this change in direction, the flow direction of the ice making water is disturbed, and the ice making water that has passed through the curved portion 28 is likely to be turbulent. Further, the vicinity of the curved portion 28 of the circulation region 38 is close to the circulation pump 30 and the flow speed of the ice making water is large.

  However, when ice-making water arrives at the throttle 40, the ice-making water temporarily increases in water pressure and decreases in flow velocity by flowing through the flow region 38 constricted by the throttle 40 (see FIG. 2B). ). When the ice making water passes through the throttle 40, the circulation region 38 is expanded and the ice making water is depressurized, whereby the ice making water is directed in the extending direction of the water sprinkling pipe 22.

  The ice making water that has passed through the throttle unit 40 then arrives at the semicircular throttle unit 42. That is, the ice-making water flows through the flow area 38 confined in the semicircular throttle portion 42, so that the water pressure of the ice-making water increases again, and the ice-making water is further decelerated. In addition, the ice-making water is guided to the water sprinkling hole 26 by the semicircular throttling part 42, and the ice-making water is smoothly supplied from the water sprinkling hole 26 to the ice making part. When passing through the semicircular throttle 42, the ice making water is depressurized and further oriented in the direction in which the pipe body 24 extends. Thus, in the sprinkling pipe 22 according to the first embodiment, the ice-making water passes through the throttle portion 40 and the semicircular throttle portion 42, thereby performing two-stage deceleration. As a result, the ice making water can be circulated straight through the distribution region 38 at a constant low speed. The ice making water decelerated in this way is supplied to the ice making unit 14 through each water sprinkling hole 26. However, stable ice making water can be supplied even in the most upstream water sprinkling hole 26 which has been unstable in the past. . That is, ice making water can be uniformly supplied from all the water spray holes 26, and the sizes of the ice blocks to be manufactured can be made uniform. Further, since the ice making water circulates through the circulation region 38 at a constant low speed, and the ice making water is sent toward the water sprinkling hole 26 by the semicircular throttle portion 42, it is difficult for air sprinkles to occur in the water sprinkling hole 26. Thereby, it can suppress that the ice lump to be manufactured becomes cloudy or irregularly shaped ice is produced.

  In the first embodiment, the case where one semicircular throttle portion 42 is provided has been described. However, a plurality of semicircular throttle portions 42 may be provided on the downstream side of the throttle portion 40 at regular intervals. In this case, each semicircular throttle part 42 is provided so as to be positioned above the corresponding watering hole 26. By providing a plurality of semicircular throttle portions 42 in this manner, the ice making water can be decelerated a plurality of times, and a more stable supply of ice making water can be realized.

  Next, the watering pipe of the flow down type ice making machine according to the second embodiment will be described focusing on the differences from the first embodiment. In addition, about the member same as Example 1, the same code | symbol is attached | subjected and description is abbreviate | omitted. FIG. 3 is a longitudinal sectional view showing a main part of the watering pipe 50 according to the second embodiment, and a throttle portion 40 similar to that of the first embodiment is recessed in the upper surface close to the curved portion 28 of the pipe body 54. Has been. A plurality of second throttle parts 52 (hereinafter referred to as second throttle parts) are provided on the upper surface of the pipe body 54 and downstream of the throttle part 40. The second throttle portion 52 is curved so that the upstream surface is inclined toward the corresponding sprinkling hole 26 and the downstream surface is inclined toward the upper surface of the pipe body 54 at a gentler inclination angle than the upstream surface. is doing. The second throttle portion 52 is positioned such that the lowest bottom portion 52a is biased to the upstream side, and the flow region 38 is narrowed by the amount that the second throttle portion 52 protrudes downward. Moreover, the 2nd aperture | diaphragm | squeeze part 52 is provided corresponding to all the water sprinkling holes 26, and the said bottom part 52a is located above each water sprinkling hole 26. As shown in FIG. In addition, as shown in FIG. 3, the adjacent 2nd aperture | diaphragm | squeeze parts 52 and 52 are comprised so that the edge part of an upstream and downstream may mutually connect.

  When ice making water is sent to the sprinkling pipe 50 in the ice making operation, the ice making water first passes through the throttle portion 40 via the curved portion 28. Then, in this throttle part 40, the ice making water is temporarily decelerated and the ice making water is directed in the extending direction of the watering pipe 50. Next, the ice-making water passes through the second throttle part 52 at the uppermost stream, where secondary deceleration is performed. That is, since the upstream surface of the second throttle part 52 has a shape that is inclined downward at an acute angle, the water pressure of the ice making water is rapidly increased and decelerated here. Further, the ice making water is guided to the sprinkling hole 26 by the upstream surface of the second throttle part 52, and the ice making water is smoothly supplied from the sprinkling hole 26. On the other hand, since the downstream surface of the second throttle part 52 is inclined upward at a gentle inclination angle, the ice-making water is gradually decompressed accordingly. In the meantime, the ice making water is directed in the extending direction of the sprinkling pipe 22.

  Next, the ice-making water is continuously decelerated at the second and third and subsequent second throttle portions 52, 52, thereby further directing the ice-making water. That is, the ice making water is circulated through the circulation region 38 at a constant low speed by suppressing the generation of turbulent flow by the throttle unit 40 and the plurality of second throttle units 52. Thereby, ice-making water is uniformly supplied from all the water spray holes 26, and the sizes of the ice blocks to be manufactured can be made uniform. Further, since the ice making water circulates at a constant low speed on the upstream side of the circulation region 38, it becomes difficult for air mist to be generated at the water sprinkling holes 26, and production of cloudy ice / deformed ice can be suppressed. In addition, since the ice making water is sent toward the sprinkling holes 26 by the second throttle parts 52, the ice making water is smoothly supplied from the sprinkling holes 26.

  Next, the watering pipe of the flow down type ice making machine according to the third embodiment will be described. Also in the description of the third embodiment, the description will focus on portions that are different from the first embodiment. As shown in FIG. 4, in the watering pipe 60 of the third embodiment, the throttle portion 40 is recessed in the vicinity of the curved portion 28 on the upper surface of the pipe body 62 as in the first embodiment. Further, a plurality of sets of a pair of side throttle parts (second throttle parts) 64 and 64 projecting so as to face each other are provided on both inner side surfaces of the pipe body 62. Each side throttle part 64 is integrally formed so as to swell in a semicircular cross section from the inner side surface of the pipe body 62, and the flow area 38 is narrowed from the side by the pair of side throttle parts 64, 64. It is like that. Here, the side throttle part 64 located in the uppermost stream is provided between the throttle part 40 and the water spray hole 26 located in the uppermost stream. Further, the side throttle portion 64 downstream from this is provided so as to be positioned between the adjacent watering holes 26, 26. The most upstream side restricting portions 64 and 64 are provided between the restricting portion 40 and the most upstream sprinkling hole 26 at a position biased toward the restricting portion 40 side. Further, the side throttle portions 64 and 64 positioned between the watering holes 26 and 26 are provided at positions that are biased toward the watering hole 26 on the upstream side. That is, the water spray hole 26 is provided so as to be close to the upstream side of each side throttle part 64 (see FIG. 4), and the ice making water decelerated by the side throttle part 64 passes through the water spray hole 26 to the ice making part 14. It is easy to be supplied.

  When ice making water is sent to the sprinkling pipe 60 in the ice making operation, the ice making water first passes through the throttle portion 40 via the curved portion 28. Then, in this throttle part 40, the ice making water is temporarily decelerated and directed in the extending direction of the sprinkling pipe 60. Next, the ice making water arrives at the uppermost side restrictors 64 and 64, and is subjected to secondary deceleration. That is, since the circulation region 38 is narrowed from both sides by the pair of side throttle parts 64, 64, the ice-making water is decelerated by increasing the water pressure on the upstream side of the side throttle part 64. Then, when passing through the side throttle parts 64, 64, the ice making water is depressurized and directed in the horizontal direction. Moreover, since the ice making water is rectified in a well-balanced manner by the side throttle portions 64 and 64 protruding from both sides, the ice making water can be directed more effectively.

  Subsequently, the ice making water is continuously decelerated at the second and third and subsequent side throttle portions 64 and 64, thereby further directing the ice making water. Here, the ice making water decelerated by the side throttle parts 64 and 64 is smoothly supplied to the ice making part 14 through the water spray holes 26 and 26 provided close to the upstream side of the side throttle parts 64 and 64. Will be. As described above, the ice making water is decelerated in a multistage manner by the restricting portion 40 and the plurality of side restricting portions 64, and the ice making water circulates in the circulation region 38 at a constant low speed. Therefore, ice making water can be stably supplied from all the water spray holes 26, and the size of the ice blocks to be produced can be made uniform. Further, since the ice making water circulates at a constant low speed also on the upstream side of the circulation region 38, it becomes difficult for air stagnation to occur in the water sprinkling holes 26 on the upstream side, and production of cloudy ice and irregular shaped ice can be suppressed. In the third embodiment, the side throttle portion 64 has a shape protruding in a semicircular cross section from the inner side surface of the pipe body 62. For example, the side throttle portion 64 has a triangular cross section from the inner side surface of the pipe body 62. It is good also as a structure which protrudes.

  Next, the watering pipe of the falling ice maker according to the fourth embodiment will be described. Also in the description of the fourth embodiment, the description will focus on portions that are different from the first embodiment. As shown in FIG. 5, the watering pipe 70 of the fourth embodiment includes a conical throttle portion 74 provided in plurality on the inner upper surface of the pipe body 72 in addition to the throttle portion 40 similar to that of the first embodiment. Each conical throttle portion 74 is formed so as to hang from the inner upper surface of the pipe main body 72 by a predetermined dimension, and the circulation region 38 is narrowed by the conical throttle portion 74. Each conical throttle portion 74 is provided on the upper surface of the pipe main body 72 so as to correspond to each water spray hole 26, and a lower end portion thereof is directed to the water spray hole 26.

  When ice making water is supplied to the sprinkling pipe 70 in the ice making operation, the ice making water passes through the curved portion 28 and is first temporarily decelerated by the throttle 40. Next, the ice making water is secondarily decelerated by the most upstream conical throttle 74. That is, when the ice making water passes through the circulation region 38 constricted by the conical throttle portion 74, secondary deceleration is performed. Moreover, since the ice making water is guided along the conical throttle portion 74 to the corresponding water sprinkling hole 26, the ice making water can be smoothly supplied to the ice making portion 14 through the water sprinkling hole 26. When the ice making water passes through the conical throttle portion 74, the pressure is reduced, and thereby the ice making water is directed in the extending direction of the sprinkling pipe 70. Thereafter, the second and third conical throttle portions 74 and 74 are continuously decelerated, and the ice-making water circulates in the circulation region 38 at a constant low speed. As a result, ice making water can be stably supplied from each water sprinkling hole 26, and the generation of air scum or the like can be suppressed, and the quality of the ice block to be produced can be improved. Further, since each conical throttle portion 74 has a conical shape projecting downward, when the supply of ice-making water to the sprinkling pipe 70 is stopped, the ice-making water attached to the conical throttle portion 74 is naturally generated. Can fall and drain well. In addition, since the ice making water dropped from the conical throttle portion 74 is discharged to the outside of the sprinkling pipe 22 through the sprinkling hole 26, it does not accumulate in the sprinkling pipe 70.

  In the first to fourth embodiments, the case where the throttle portion 42 is provided on the upper surface of the pipe main body 24, 54, 62, 72 is shown. However, if the flow region 38 is locally narrowed, the throttle portion 42 is provided. May be provided on the side surfaces of the pipe bodies 24, 54, 62, 72, or may be provided on the entire inner peripheral surface of the pipe bodies 24, 54, 62, 72. Moreover, the shape of the aperture | diaphragm | squeeze part 42 can be changed suitably, and does not necessarily need to be set as the structure provided with the bottom part 40a demonstrated in Examples 1-4. Furthermore, the shape of the second throttle portions 42, 52, 64, 74 is not limited to the shape described in the first to fourth embodiments, and other shapes can be used as long as the flow region 38 is locally narrowed. It is possible to adopt. For example, the second throttle portion may be configured to protrude from the upper surface of the pipe main body 24, 54, 62, 72 in a regular triangular shape.

  Next, the watering pipe of the flow down type ice making machine according to the fifth embodiment will be described. Also in the description of the fifth embodiment, the description will focus on portions that are different from the first embodiment. As shown in FIG. 6, the water sprinkling pipe 80 of the fifth embodiment is provided with a throttle portion 40 on the upper surface of the pipe body 86 and on the upstream side of the most upstream water sprinkling hole 26. The throttle unit 40 according to the fifth embodiment includes a pair of guide projections 82 and 82. Each guide protrusion 82 protrudes downward from the upper inner surface of the pipe body 86, extends in the extending direction of the pipe body 86 by a predetermined length, and has a rectangular cross section (see FIG. (See FIG. 6 (b)). Further, the pair of guide protrusions 82 and 82 are provided to be separated from each other in the width direction of the pipe body 86, and between the guide protrusions 82 and 82 and between the guide protrusions 82 and the inner side surface of the pipe body 86. In between, the guide area | region 84 which guides ice making water to the extension direction of this pipe main body 86 is defined.

  When ice making water is supplied to the sprinkling pipe 80 in the ice making operation, the ice making water arrives at the throttle unit 40 via the curved portion 28. Then, the ice making water is decelerated by the guide protrusions 82 and 82. On the other hand, a part of the ice making water passes through the guide region 84 and is directed in the extending direction of the pipe body 86. Thereby, ice-making water can distribute | circulate the distribution area 38 at a fixed low speed, and can supply ice-making water uniformly from each water sprinkling hole 26. FIG. Moreover, generation | occurrence | production of air dirt etc. can be suppressed and the quality of the ice block manufactured can be improved. In the fifth embodiment, although two guide protrusions 82 are formed, three or more guide protrusions 82 may be formed. Alternatively, the cross-sectional shape of each guide protrusion 82 may be an elliptical shape that is long in the direction in which the watering pipe 70 extends. Thereby, distribution resistance of ice making water can be controlled. Further, a plurality of pairs (or three or more pairs) of guide protrusions 82 and 82 may be formed in the extending direction of the pipe body 86. Note that the second throttle portions 42, 52, 64, and 74 described above may be provided on the downstream side of the guide protrusions 82 and 82 in the pipe body 86.

  Next, the watering pipe of the falling ice maker according to the sixth embodiment will be described. Also in the description of the sixth embodiment, the description will focus on portions that are different from the first embodiment. As shown in FIG. 7, the sprinkling pipe 90 of the sixth embodiment is provided with a decompression rectification unit 94 on the upper surface near the curved portion 28 in the pipe body 92 and on the upstream side of the most upstream sprinkling hole 26. . The decompression rectification unit 94 is formed so as to bulge upward from the upper surface of the pipe body 92, and a hemispheric decompression space 96 into which ice-making water can flow is defined. That is, the decompression space 96 protrudes upward from the inner surface of the pipe body 92, thereby expanding the circulation region 38. Then, the ice-making water flows into the decompression space 96, whereby the ice-making water circulates in the decompression space 96 in a spiral manner (generation of vortex flow), whereby the ice-making water is decompressed.

  When ice making water is supplied to the sprinkling pipe 90 in the ice making operation, the ice making water reaches the decompression rectification unit 94 via the curved portion 28. Then, a part of the ice making water flows into the decompression space 96 of the decompression rectification unit 94, and an eddy current is generated in the decompression space 96 (see FIG. 7). Thereby, the ice making water is depressurized, the flow speed of the ice making water is suppressed, and the ice making water can be supplied uniformly from each water sprinkling hole 26. Moreover, generation | occurrence | production of air dirt etc. can be suppressed and the quality of the ice block manufactured can be improved. Moreover, since the ice making water flows into the decompression space 96 as the flow speed of the ice making water increases, the decompression effect is further improved and the ice making water can be supplied uniformly. In addition, in the watering pipe 90 in Example 6, you may provide the 2nd aperture | diaphragm | squeeze part 42,52,64,74 shown in Examples 1-4.

  In addition, in Examples 1-6, although the case where the water sprinkling pipe 22,50,60,70,80,90 was horizontally arrange | positioned above the ice making part 14 was shown, the state where the water sprinkling pipe inclines slightly, for example May be arranged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram showing a flow down type ice making machine provided with a watering pipe according to a first embodiment. It is sectional drawing which shows the watering pipe which concerns on Example 1, Comprising: (a) is a longitudinal cross-sectional view which shows the whole watering pipe, (b) is a longitudinal cross-sectional view which expands and shows the principal part of a watering pipe, (c) is It is an AA line transverse cross section of (b). It is a longitudinal cross-sectional view which expands and shows the principal part of the watering pipe which concerns on Example 2. FIG. It is a cross-sectional view which expands and shows the principal part of the watering pipe which concerns on Example 3. FIG. It is a longitudinal cross-sectional view which expands and shows the principal part of the watering pipe which concerns on Example 4. FIG. It is sectional drawing which shows the principal part of the watering pipe which concerns on Example 5, Comprising: (a) is a longitudinal cross-sectional view, (b) shows the BB line cross-sectional view of (a). It is a longitudinal cross-sectional view which shows the principal part of the watering pipe which concerns on Example 6. FIG.

Explanation of symbols

14 Ice making part, 24, 54, 62, 72, 86, 92 Pipe body, 26 Sprinkling hole 30 Circulation pump, 38 Distribution area, 40 Restriction part 42 Semicircular restriction part (second restriction part), 52 Second restriction Part (second aperture part)
64 Side diaphragm part (second diaphragm part), 74 Conical diaphragm part (second diaphragm part)
82 guide protrusion, 94 decompression rectification unit, 96 decompression space

Claims (8)

A pipe body (24, 54) arranged to extend above the ice making section (14), communicates with the discharge port of the pump (30), and through which ice-making water discharged from the discharge port of the pump (30) flows. , 62, 72, 86) and the lower surface of the pipe body (24, 54, 62, 72, 86) and spaced apart in the extending direction of the pipe body (24, 54, 62, 72, 86). A plurality of water sprinkling holes (26), and the ice making water sucked up by the pump (30) and circulated in the pipe main body (24, 54, 62, 72, 86), 26) In the sprinkling pipe of the flow-down type ice maker that supplies to the ice making section (14) via
The pipe body (24, 54, 62, 72, 86) protrudes from the inner surface of the pipe body (24, 54, 62, 72, 86) on the upstream side of the water sprinkling hole (26) located at the uppermost stream. A sprinkling pipe for a flow-down type ice making machine, characterized in that a throttle part (40) for locally constricting the circulation area (38) of the ice making water is provided.   The pipe body (24, 54, 62, 72) protrudes from the inner surface of the pipe body (24, 54, 62, 72) on the downstream side of the throttle portion (40), and the ice-making water circulation region (38). The sprinkling pipe for a flow-down type ice maker according to claim 1, wherein one or more second throttle parts (42, 52, 64, 74) for locally constricting the water are provided.   The flow down according to claim 2, wherein the second throttle part (42) is provided so as to be positioned above the water spray hole (26), and is formed in a semicircular shape curved from the upstream side toward the downstream side. Sprinkling pipe for ice machine.   The second throttle portion (52) is provided so as to be positioned above the water spray hole (26), and the upstream surface is inclined toward the corresponding water spray hole (26) and the downstream surface is The water sprinkling pipe for a flow-down ice maker according to claim 2, wherein the water spray pipe is curved so as to be inclined toward the upper surface of the pipe body (54) at a gentle inclination angle from the upstream side surface.   The second throttle part is provided between the throttle part (40) and the adjacent watering hole (26) or between the watering holes (26, 26) adjacent to each other, and the pipe body ( 62. The watering pipe for a flow-down type ice making machine according to claim 2, wherein the watering pipes are a pair of side throttle portions (64, 64) projecting so as to face each other from the side surface of 62).   The second throttle portion is provided so as to be positioned above the water sprinkling hole (26), and is a conical throttling portion that hangs down from the upper inner surface of the pipe body (72) toward the corresponding water sprinkling hole (26). The watering pipe of the flow-down type ice making machine according to claim 2, wherein the watering pipe is (74).   The throttle part (40) is provided on the upper surface of the pipe body (86) so as to be separated from each other in a direction perpendicular to the extending direction of the pipe body (86), and projects downward from the inner surface of the pipe body (86). The sprinkling pipe of the flow-down ice maker according to any one of claims 1 to 6, further comprising a plurality of guide protrusions (82, 82) extending in the extending direction of the pipe body (86) in a state where the pipe body (86) is extended. . A pipe body (92) arranged to extend above the ice making section (14), communicated with the discharge port of the pump (30), and through which ice-making water discharged from the discharge port of the pump (30) flows. A plurality of water spray holes (26) provided on the lower surface of the pipe body (92) and spaced apart in the extending direction of the pipe body (92), and sucked up by the pump (30). In the water sprinkling pipe of a flow-down type ice making machine that supplies ice making water flowing through the pipe body (92) to the ice making section (14) through the water sprinkling holes (26),
The pipe body (92) is a hemisphere that protrudes upward from the inner surface of the pipe body (92) on the upstream side of the water sprinkling hole (26) located at the uppermost stream and locally expands the ice-making water circulation region (38). A sprinkling pipe of a flow-down type ice making machine, characterized in that a decompression rectification unit (94) having a vacuum decompression space (96) is provided.

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