JPH11142032A - Water pan structure of automatically ice making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an ice making capacity per day while shortening ice removing time by forming ice between a plate material adapted to reduce a peeling force between an ice layer and a water pan and the water pan. SOLUTION: A plurality of water supply pipes 18 are arranged in parallel being separated at a specified interval in an opening 48 formed in a water pan 16. Recessed parts 52 and 52 are formed in the top surface of the water supply pipes 18 on both sides in the direction of extending the pipes sandwiching water spray holes 21. A flexible resin plate 30 is arranged fully closing the opening 48. A slot 54 is bored at positions corresponding to the water spray holes 21 of a resin plate to communicate with the water spray holes 21 being extended by a specified length in the direction of extending the water supply pipes 18. Both end parts along the length of the slot 54 are located above the recessed parts 52 and 52 positioned on both sides sandwiching the water spray holes 21. Then, in the ice making operation, water yet to be frozen left from a freezing in a small ice making chamber flows down to the recessed parts 52 and 52 from the slot 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water tray structure for an automatic ice maker, and more particularly, to an automatic ice maker capable of shortening the deicing time and producing a good-quality ice block having a uniform shape. It relates to a water dish structure.

[0002]

2. Description of the Related Art A jet type automatic ice making machine for continuously producing ice cubes as a large number of ice blocks by spraying and supplying ice making water from below into a large number of ice making compartments opening downward is used in coffee shops and restaurants. It is suitably used in kitchen facilities. As shown in FIG. 8, the ice making mechanism of this automatic ice making machine has an ice making room 10 horizontally arranged above the inside of the housing, and a plurality of partition plates 11 arranged vertically and horizontally on the lower surface of the ice making room 10 to lower it. A large number of opened ice making chambers 12 are defined in a grid pattern. On the upper surface of the ice making chamber 10, an evaporator 13 communicating with a refrigeration system (not shown) is closely arranged in a meandering manner. During the ice making operation, a refrigerant is circulated in the evaporator 13 to make the ice making chamber 1 smaller.
2 is forcedly cooled, and a high-temperature refrigerant gas (hereinafter, referred to as "hot gas") is circulated during the deicing operation so that the ice making chamber 12 is cooled.
Is configured to be heated.

A water tray 16 having an ice making water tank 14 for storing a predetermined amount of ice making water is pivotally supported by a support shaft 17 directly below the ice making chamber 10. This water dish 1
The ice making chamber 6 is horizontally positioned so as to be close to the ice making chamber 10 during the ice making operation, is held so as to close the ice making chamber 12 of the ice making chamber 10 from below, and is attached by a tilting mechanism (not shown) during the ice making operation. The ice making chamber 12 is opened by being urged and tilted clockwise about the support shaft 17 and stopped in an oblique state.

[0004] A flat plate portion 19 having a required thickness for closing all the ice making compartments 12 during the ice making operation is formed at a portion where the water tray 16 faces the ice making compartment 10. A plurality of fountain holes 21 for injecting ice making water into each of them, and a large number of return holes 23, 23 adjacent to the fountain holes 21 for collecting uncondensed water in the ice making water tank 14. Further, as shown in FIG. 9, a plurality of water supply pipes 18 are formed on the lower surface of the flat plate portion 19, and each fountain hole 21 communicates with the corresponding water supply pipe 18. A pump 20 is provided on the side of the ice making water tank 14. The pump 20 sucks ice making water through a suction pipe 22 communicating with the tank 14, and a pressure provided on the water tray 16 through a discharge pipe 24 shown in the drawing. The pressure is fed into the chamber 26. Then, the ice making water pumped into the pressure chamber 26 is supplied to each of the plurality of fountain holes 21 through each water supply pipe 18.
Is supplied to each of the ice making chambers 12 by spraying.

[0005] Since the ice making chamber 12 is cooled below freezing by the operation of the refrigeration system, a part of the ice making water injected and supplied into the chamber starts to freeze in layers on the inner wall surface of the ice making chamber 12. In addition, the non-freezing water is formed in the return hole 2 of the water dish 16.
It falls from 3,23 and is collected in the ice making water tank 14.
This ice making operation proceeds, and complete ice cube 28
Is generated, an appropriate detection means detects this, outputs an ice making completion signal, and stops the ice making operation. Next, a deicing operation is started, and hot gas is supplied to the evaporator 13 by switching the valve body to heat the entire ice making chamber, and the ice making small chamber 12 is heated.
The ice formed between the inner wall surface and the ice cube 28 is melted. At the required timing, the water tray 16 is tilted to open the lower opening of the ice making chamber 12, and the space between the inner wall of the ice making chamber 12 and the ice cube 28 is gradually melted by the hot gas continuously supplied. . As a result, the ice cubes 28 fall from the ice making chamber 12 under their own weight, slide down the water tray 16 diagonally downward, and are stored in an ice storage (not shown).

In the water tray structure of the automatic ice maker, ice cubes 28 are discharged from the ice maker 10 in a short time during the deicing operation, so that the lower end of the ice maker 10 and the water tray 16 are arranged as shown in FIG. A small gap is provided between the surfaces of the ice cubes 28a and the ice layer 28a having a required thickness is formed in the gap to connect the ice cubes 28 to each other. That is, when the frozen surface of the ice making small chamber 12 and the ice cubes 28 melts during the deicing operation, the weight of all the interconnected ice cubes 28 acts in a direction in which the ice cubes are separated from the ice making chamber 10, This promotes deicing. By the way, in a configuration in which a gap is provided between the lower end of the ice making chamber 10 and the surface of the water tray 16 to form the ice layer 28a, the ice layer 28a freezes firmly on the surface of the water tray when the ice making is completed. I have. Moreover, since the water tray 16 itself is made of a highly rigid material, if the water tray 16 is tilted during the deicing operation, the frozen surface between the ice layer 28a and the water tray 16 will be peeled off at once, Water dish 16
There is a problem that an excessive load is applied to the tilting mechanism (the actuator or the like) and the ice cube 28 cannot be taken out in a good condition.

[0008] Therefore, as shown in FIG. 8, a peeling resin formed of a flexible material having a property that ice blocks hardly adhere to the surface of the flat plate portion 19 forming the water tray 16. The plate 30 is provided to reduce the peeling force between the ice layer 28a and the water tray 16 during the deicing operation. The resin plate 30 is fixed to the surface of the water dish only in the vicinity of the edge, and the other portions are in contact with the surface of the water dish. As a result, the ice layer 28a and the resin plate 30 do not freeze firmly, and when the water tray 16 is tilted, the resin plate 30 bends and gradually separates from the ice layer 28a. It is possible to prevent an excessive load from being applied to the tilting mechanism or chipping of the ice cube 28.

[0008]

However, the problem here is that when the water tray 16 is tilted in the deicing operation, the resin plate 30 remains bent and the resin plate 30 is bent. A gap is created between the lower surface and the surface of the water dish. If the deformed state of the resin plate 30 is not completely restored even when the water tray 16 is turned to the ice making position after all the ice cubes 28 in the ice making compartment have fallen, the water is supplied from the fountain holes 21. The ice making water enters the gap between the resin plate 30 and the surface of the water dish and freezes. In addition, when the temperature of tap water is high as in summer, the temperature of the ice making water supplied to the ice making room 10 is relatively high, so that the ice in the gap is melted at the beginning of the next ice making operation. When the temperature of ice making water is low, such as in winter, ice in the gap remains without being melted. When the ice making operation and the deicing operation are repeated in this state, the ice in the gap gradually grows, and the resin plate 30 rises from the surface of the water dish.

That is, when the water tray 16 faces the ice making position, the partition plate 11 and the resin plate 3 disposed in the ice making chamber 10 are provided.
0 becomes narrower or the resin plate 30 becomes
A thin portion of the ice layer 28a,
There will be portions where the ice layer 28a is not formed at all. In this case, in the initial stage of the deicing operation, the thin ice layer 2
8a is melted, and a group of ice cubes connected by the ice layer 28a is formed separately at a portion where there is no ice layer 28a. Therefore, the divided ice cubes are separately discharged with a required time difference as the deicing operation proceeds according to the weight thereof, and all the ice cubes 28 generated in the ice making chamber 10 are discharged. It takes a long time to perform the operation, and there is a problem that the ice making capacity of the ice cube 28 is reduced. In the ice machine,
The completion of the deicing operation is controlled by detecting the temperature rise of the ice making chamber 10 caused by the discharge of the ice cubes 28 from the ice making chamber 10. However, the divided ice cubes are not uniform. When the water is discharged to the outside, the degree of temperature rise differs depending on the state of discharge, and there is a drawback that detection of completion of the deicing operation becomes uncertain.

[0010] Furthermore, if the ice removal operation becomes unnecessarily long due to the uneven release of ice cubes, the ice cubes whose release is delayed are excessively thawed and become deformed ice or become thin and uneven in size. Difficulties are pointed out. When the ice in the gap between the resin plate 30 and the water tray 16 grows large by repeating the ice making operation and the ice removing operation, the resin plate 30 is moved to the ice making chamber 12.
There is also a problem that it may be damaged by strongly hitting the lower end of the sheet.

As a solution to the above-mentioned problem, there is a "water tray structure of an automatic ice maker" according to the invention of the present applicant. In the water tray structure according to the earlier application, an opening larger than the outer size of the ice making chamber is formed in the water tray, and a plurality of water supply pipes having fountain holes are arranged in parallel in this opening. A resin plate covering the opening is provided so as to be in contact with the upper surface of the water supply pipe, and at a position corresponding to the fountain hole of the resin plate,
A through hole is provided for returning unfreezed water that has not been frozen in the ice making chamber to the ice making water tank through the opening. That is, according to this configuration, the lower surface of the resin plate is only in contact with the upper surface of the water supply pipe, and the other portion faces the opening. The generation of ice that pushes up the pressure can be suppressed.

Further, in the water tray structure, in order to further reduce the contact area between the resin plate and the water supply pipe, the upper surface of the water supply pipe except for the portion where the fountain hole is formed does not contact the lower surface of the resin plate. A recess is formed. In this case, when the ice making time is set to be longer than necessary at a low temperature such as in winter, a part of the uniced water flowing down through the through hole of the resin plate enters the gap between the resin plate and the concave portion and stays. ,
This retained water may freeze. That is, depending on the ice-making conditions and the like, ice that pushes up the resin plate is generated on the lower surface side of the resin plate, which may cause the above-described problem.

[0013]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned drawbacks inherent in the water tray structure of an automatic ice maker, and has been proposed to solve the problem in a favorable manner. During de-icing operation, ice is prevented from being formed between the plate material and the water tray to reduce the peeling force between the ice layer and the water tray,
It is an object of the present invention to provide a water tray structure of an automatic ice maker capable of shortening a deicing time and improving a Nissan ice making capacity.

[0014]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and appropriately achieve the intended purpose, the present invention provides an ice-making chamber defining a plurality of ice-making compartments that open downward, A water tray having an opening that communicates vertically with a dimension larger than the outer shape of the ice-making chamber; and a water tray that is arranged in the opening of the water tray at a required interval, and is provided in each of the ice-making chambers. A plurality of water pipes with corresponding fountain holes,
A flexible plate member that is disposed in the opening so as to cover the upper surfaces of all the water supply pipes and that can close all the ice making compartments with the water tray close to the ice making compartment during ice making operation; A recess formed on both sides of the pipe in the direction in which the fountain hole extends on the upper surface of the pipe and not in contact with the lower surface of the plate member, and injecting ice-making water into each ice-making small chamber via the injection hole of the water supply pipe during ice-making operation In an automatic ice making machine configured to supply and freeze ice on an indoor wall surface to generate an ice block, a long hole communicating with the fountain hole and the concave portion is provided at a position corresponding to each fountain hole of each water supply pipe on the plate material. In the ice making operation, ice making water is jetted and supplied to the ice making small chamber through each fountain hole and the long hole of the plate material during the ice making operation, and the uniced water flowing down without freezing in the small room, The length Characterized by being configured so as to flow down into the recess from.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a water tray structure of an automatic ice maker according to the present invention will be described in detail with reference to the accompanying drawings with reference to preferred embodiments. 8 and 9
Regarding the same members as those described in the related art, the same reference numerals are used, and detailed description thereof will be omitted. As shown in FIG. 1, the water tray 16 is formed in a rectangular frame shape from a pair of side walls 40 and 42 facing each other while being spaced apart from each other left and right, and a back wall 44 and a front wall 46 facing each other while being spaced back and forth. The water tray 1 is supported by a support shaft (not shown) disposed on the wall 44.
6 is pivotally supported so as to be tiltable. Four walls 40, 42, 44,
The rectangular opening 48 vertically communicated and surrounded by 46 is set to be larger than the outer dimensions of the ice making chamber 10. Also each wall 4
At 0, 42, 44, and 46, mounting portions 50 extending toward the opening side (inside) are formed, and each mounting portion 50 has a screw hole 50a for mounting and fixing the resin plate 30 described later. A plurality is formed.

A plurality of water supply pipes 18 communicating with a pressure chamber (not shown) provided on the back wall 44 side are provided inside the opening 48.
Are arranged in parallel in the left-right direction at predetermined intervals. As shown in FIG. 3, the upper surface level of each water supply pipe 18 is set to be the same as the upper surface level of the mounting portion 50, and a fountain hole corresponding to each ice making chamber 12 of the ice making room 10 is provided above the pipe 18. 21 are drilled. That is, the ice making water pumped from the ice making water tank 14 to the pressure chamber during the ice making operation is jetted and supplied to the ice making small chamber 12 from each fountain hole 21 of the water supply pipe 18. Also, on the upper surface of the water supply pipe 18, both sides in the pipe extending direction sandwiching each fountain hole 21 are provided.
As shown in FIG. 2, concave portions 52, 52 that are lower than the upper surface level are formed in (a portion where the fountain holes 21 are not formed), and the lower surface of the resin plate 30 described below does not contact the concave portions 52. It is configured as follows. In addition, the fountain hole 21 is located on the convex portion 30 which is sandwiched between the concave portions 52 and 52 and protrudes upward.

On the upper surface of the mounting portion 50, a resin plate (plate material) 30 made of a material having a property that ice blocks hardly adhere and having flexibility is placed in a state where the opening 48 is completely closed. Is placed. Then, the edge of the resin plate 30 is screwed into the screw hole 50a so that the mounting portion 5 is inserted.
0, and the portion of the resin plate 30 corresponding to the ice making chamber 12 is configured to be able to bend. At a position corresponding to the fountain hole 21 of the water supply pipe 18 on the resin plate 30, as shown in FIG. 1, a long hole 54 extending at a required length in the extending direction of the water supply pipe 18 and communicating with the fountain hole 21 is provided. Has been drilled. As shown in FIGS. 2 and 4, the long hole 54 is located such that both ends in the longitudinal direction communicate with the upper portions of the recesses 52, 52 located on both sides of the fountain hole 21. The non-freezing water which has not been frozen in the inside 12 is configured to actively flow down from the long hole 54 to the concave portions 52, 52. And this non-freezing water is formed in the recess 5
2, 52, fall outside the water supply pipe 18 through the opening 48, and return to the ice making water tank 14. The width of the long hole 54 in the left-right direction is set to be smaller than the width of the water supply pipe 18 as shown in FIGS.
52.

As the material of the resin plate 30, for example, fluorine resin, polypropylene, polyacetal, fluorocarbon resin represented by Teflon (registered trademark), polyethylene, and the like are preferably used. Since the resin plate 30 made of this material has a property of easily peeling off ice blocks (a property that ice blocks are unlikely to adhere), the ice layer 28a connecting the ice cubes 28 generated in the ice making chamber 12 is made of resin. It prevents ice from being firmly frozen on the surface of the plate 30, and when the water tray 16 is tilted and opened, an excessive load is applied to the tilting mechanism or the ice cube 28
The lower end of the is not lost. The lower surface of the resin plate 30 is only in contact with the mounting plate 50 and the upper surface of the convex portion 53 in which the fountain hole 21 in the water supply pipe 18 is formed, and the other portion faces the opening 48. That is, ice that pushes up the resin plate 30 is hardly generated on the lower surface side of the resin plate 30 during the ice making operation.

[0019]

Next, the operation of the water tray structure of the automatic ice maker according to the embodiment will be described below. When the ice making operation of the automatic ice making machine is started, the ice making water in the ice making water tank 14 is pumped to each water supply pipe 18 and each of the fountain holes 21 of the pipe 18 is made.
And, it is injected and supplied to the ice making small chamber 12 through the long hole 54 of the resin plate 30. Since the ice making chamber 12 is cooled by the refrigerant supplied from the refrigeration system to the evaporator 13, the ice making water comes into contact with the inner wall of the ice making chamber 12 and is gradually cooled. The water falls outside the water supply pipe 18 through the recesses 52, 52 and the opening 48 and returns to the ice making water tank 14.

As the ice making operation proceeds, the ice making compartment 12
A part of the ice making water starts to freeze on the inner wall surface of the inside, and finally solid ice cubes 28 are generated. At this time, the resin plate 3
In the area where the ice making chamber 10 is closed from below at 0, since the lower surface of the resin plate 30 is only in contact with the upper surface of the convex portion 53 of the water supply pipe 18, uniced water is generated between the two. It hardly permeates and stays in between. In addition, the gap between the resin plate 30 and the concave portion 52 of the water supply pipe 18 always includes a slot 5 of the resin plate 30 during the ice making operation.
Since the non-freezing water is actively flowing down through 4, the water does not stay in the concave portion 52. Therefore, even when the ice making time is set longer than necessary at a low temperature such as in winter, water is prevented from being frozen between the resin plate 30 and the concave portion 54. That is, in the ice making operation, the resin plate 3
0 is always kept in a horizontal state, a uniform gap is secured between the lower end of the ice making chamber 12 and the surface of the resin plate 30, and an ice layer 28a is formed in the gap to be generated in the ice making chamber 10. All ice cubes 28 are interconnected. The resin plate 3
Since 0 has the property of easily separating the ice block (the property that the ice block is unlikely to adhere), it is possible to prevent the ice layer 28a from being strongly frozen on the surface of the resin plate 30.

When the ice cubes 28 are completely formed as described above, the temperature of the ice making chamber 10 drops. This is detected by an appropriate detecting means, and the ice making operation is stopped to complete the ice making. When the ice making is completed, hot gas is supplied to the evaporator 13 by switching of the refrigeration system valve, and the ice making chamber 1 is turned on.
Heat 0. The tilting mechanism is activated at an appropriate timing, and the water tray 16 starts tilting clockwise around the support shaft 17. At this time, the resin plate 30 bends with the tilting of the water tray 16, and is gradually peeled off from the lower end side in the tilting direction with respect to the ice layer 28a. As a result, no excessive load is applied to the tilting mechanism, and the ice cube 28 does not break.

When the hot gas is circulated and supplied to the evaporator 13, the frozen surfaces of the ice making chambers 12 and the ice cubes 28 are melted. At this time, the ice cubes 28 are connected to each other by an ice layer 28a formed at a lower end thereof with a constant thickness, and all the ice cubes 28 are separated from the ice making chamber 12 at a time, so that the ice cubes can be quickly removed. It can be dropped and discharged from the ice making chamber 12. Then, the detecting means detects a rise in temperature due to the release of the ice cubes 28 from the ice making chamber 10, and turns the water tray 16 counterclockwise to close the ice making chamber 12 from below. The ice cubes 28 that have fallen from the ice making chamber 10 slide down on the resin plate 30 in the inclined water tray 16 and are guided to the ice storage, and the long holes 54 of the resin plate 30 extend along the inclined direction. Since it is formed, the sliding of the ice cube 28 due to the long hole 54 is inhibited.

Thus, in the water dish structure according to the embodiment,
Since ice for pushing the resin plate 30 upward is not formed on the lower surface of the resin plate 30 for reducing the peeling force between the ice layer 28a and the water tray 16 during the deicing operation, the lower end of the ice making chamber 12 and the resin A uniform gap with the surface of the plate 30 can be secured. Therefore, all the ice cubes 28 formed in the ice making chamber 10 are connected to each other by the ice layer 28a formed in the gap, and all the ice cubes 28 fall and discharge at one time during the deicing operation, thereby shortening the deicing time. And the ability to make Nissan ice will be improved. In addition, ice cubes 28 having a uniform shape and size can be obtained. Further, as compared with the conventional structure in which the water tray is provided with a flat plate portion for closing the ice making chamber, the amount of material used can be reduced and the manufacturing cost of the water tray itself can be reduced.

FIGS. 5 to 7 show modified examples of the resin plate according to the embodiment. The width of the long hole 56 formed in the resin plate 30 is made larger than the width of the water supply pipe 18. Is also set large so that the convex portion 53 in which the fountain hole 21 is formed faces the long hole 56. That is, in this modification, the resin plate 30 and the water supply pipe 18 are configured not to contact at all. Also in this modified example, in the gap defined between the resin plate 30 and the concave portion 52, the uniced water is positively prevented from flowing down through the long holes 56 to prevent the water from staying. The resin plate 30
No ice that pushes the resin plate 30 upwards is formed on the lower surface of the substrate.

[0025]

As described above, according to the water tray structure of the automatic ice maker according to the present invention, since the lower surface of the plate is configured to contact only the upper surface of the water supply pipe where the recess is not formed, the plate is The ice which pushes the plate material upward is hardly formed on the lower surface of the plate. In addition, since non-freezing water is positively flowed into the gap between the concave portion of the water supply pipe and the lower surface of the plate member, it is possible to prevent water from staying in the gap and freezing. That is, a required gap can be reliably defined between the lower end of the ice making chamber and the surface of the plate material,
All ice blocks can be connected by the ice layer generated in the gap. Thereby, all the ice blocks can be discharged at once, and the ice removing operation can be performed in a short time to improve the Nissan ice making capacity. Further, there is an advantage that the completion of deicing can be accurately detected to prevent the formation of deformed ice, and that high-quality ice blocks with uniform dimensions can be efficiently produced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a water tray structure of an automatic ice maker according to a preferred embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing a main part of a water tray structure of the automatic ice maker according to the embodiment.

FIG. 3 is a vertical sectional front view of a main part showing a water tray structure of the automatic ice maker according to the embodiment.

FIG. 4 is an explanatory diagram illustrating a relationship between a long hole of a resin plate and a concave portion of a water supply pipe according to the embodiment.

FIG. 5 is a vertical sectional side view of a main part showing a water dish structure employing a resin plate according to a modification.

FIG. 6 is a longitudinal sectional front view of a main part showing a water dish structure employing a resin plate according to a modification.

FIG. 7 is an explanatory diagram showing a relationship between a long hole of a resin plate and a convex portion of a water supply pipe according to a modification.

FIG. 8 is a vertical sectional side view showing an ice making mechanism of an automatic ice making machine according to a conventional technique.

FIG. 9 is a vertical sectional front view showing a part of a water tray structure of an automatic ice maker according to the related art.

[Explanation of symbols]

Reference Signs List 10 ice making room, 12 ice making room, 16 water tray, 18 water supply pipe, 21 fountain hole 28 ice cube (ice block), 30 resin plate (plate material), 48 opening, 5
2 recess, 54 long hole 56 long hole

Claims (1)

[Claims] An ice making compartment (10) defining a plurality of ice making compartments (12) opening downward, and an ice making compartment (10) which is disposed to be tiltable below the ice making compartment (10). A water dish (16) having an opening (48) communicating with the top and bottom with dimensions larger than the outer shape, and this water dish (16)
A plurality of water supply pipes (18), which are provided in a line at predetermined intervals within the opening (48) of the water supply pipe, and are provided with fountain holes (21) corresponding to the respective ice making chambers (12), and all the water supply pipes. All the ice making compartments are arranged in the opening (48) so as to cover the upper surface of (18), and the water tray (16) is placed close to the ice making compartment (10) during the ice making operation.
A flexible plate material (30) capable of closing (12), and formed on both sides in the pipe extending direction sandwiching each fountain hole (21) on the upper surface of each water supply pipe (18), and the plate material ( 30), the ice making water is injected and supplied to each ice making small chamber (12) through the injection hole (21) of the water supply pipe (18) during the ice making operation, and In the automatic ice making machine configured to generate ice blocks (28) by freezing into water, each fountain hole (21) of each water supply pipe (18) in the plate material (30)
At a position corresponding to the above, a long hole (54, 56) communicating with the fountain hole (21) and the concave portion (52, 52) is drilled along the pipe extending direction, and the ice making water is supplied to each fountain hole during the ice making operation. (21) and plate material
(30) The ice making chamber (12) is jetted and supplied through the long holes (54, 56), and the non-freezing water flowing down without freezing in the small chamber is recessed from the long holes (54, 56). A water tray structure for an automatic ice maker, wherein the water tray is configured to flow down to (52, 52).