JPH0979714A - Automatic ice making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable ice blocks having regular arranged shaped with better quality to be manufactured and to improve a daily ice manufacturing capability by a method wherein a composing part opposing against an ice making chamber at a water pan is formed by resin material having adding agent mixed in a desired rate with it to which ice blocks are hardly adhered. SOLUTION: A main body 58 of a water pan is formed by a base plate made of resin material such as ABS and by resin material mixed with adding agent of fluorocarbon resin or the like, resulting in that a water passage lid 60 formed only with the base plate and a pressure chamber lid 62 can be adhered to the main body 58 of the water pan without any leakage of water. Since the main body 58 of the water pan has a characteristic as a characteristic of adding agent in which ice blocks are hardly adhered, an ice layer connecting the cubic ices generated at the ice making small chambers during an ice manufacturing operation is not strongly iced to the surface of the main body 58 of the water pan. The water pan inclined with an inclining mechanism during ice removing operation can be smoothly peeled off from the ice layer and it is possible to prevent an excessive load from being applied to the inclining mechanism and a lower end of the cubic ice from being cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ice-making machine which is adapted to circulate and supply ice-making water from below into an ice-making small chamber that opens downward to generate ice blocks in the ice-making small chamber.

[0002]

2. Description of the Related Art In various industrial fields, an automatic ice-making machine for continuously producing a large amount of dice-shaped ice cubes is suitably used according to its use. For example, a cube-shaped ice-making small chamber that is defined to open downward in the ice-making chamber is opened and closed by a water tray from below, and ice-making water is jet-supplied from each water tray to each ice-making small chamber, A so-called closed cell system in which ice cubes are generated in the ice making compartment, or ice cube water is directly supplied from below to a large number of cubic ice making compartments that open downward to form ice cubes in the ice making compartment. There is known a so-called open cell method.

As shown in FIG. 3, the ice making mechanism of the jet type automatic ice making machine as the closed cell system has an ice making chamber 10 arranged horizontally in the upper part of the housing and vertically and horizontally arranged on the lower surface of the ice making chamber 10. By the plurality of partition plates 11 described above, a large number of ice making small chambers 12 opening downward are defined in a grid pattern. Further, on the upper surface of the ice making chamber 10, an evaporator 13 communicating with a refrigerating system (not shown) is closely arranged in a meandering manner, and a refrigerant is circulated in the evaporator 13 during the ice making operation so that the ice making small chamber 1
2 is forcedly cooled, and at the time of deicing operation, a high temperature refrigerant gas (hereinafter referred to as "hot gas") is circulated to make the ice making small chamber 12
Is configured to heat.

Immediately below the ice making chamber 10, a water tray 16 having an ice making water tank 14 for storing a predetermined amount of ice making water is tiltably supported by a support shaft 17. This water dish 1
6 is horizontally held during the ice making operation and held in parallel with the ice making chamber 10. At the time of the deicing operation, 6 is biased by a tilting mechanism (not shown) to tilt clockwise around the support shaft 17. The ice making small chamber 12 is opened by stopping in an oblique state.

As shown in FIG. 3, the water tray 16 has a fountain hole 21 for spraying ice making water corresponding to each of the small ice making chambers 12, and a return hole for collecting unfrozen water in the ice making water tank 14. (Not shown) and a large number of holes are formed. Further, a plurality of water passages 18 are formed on the lower surface of the water tray 16 and each of the fountain holes 21
Communicates with the corresponding water channel 18. Ice making water tank 1
A pump 20 is disposed on the side of the tank 4, and the ice-making water is pumped through a suction pipe 22 communicating with the tank 14, and a pressure chamber 26 provided in a water tray 16 through a discharge pipe 24 shown in the drawing. It is designed to be sent to. Then, the ice-making water pressure-fed to the pressure chambers 26 is jet-supplied into the ice-making small chambers 12 from the large number of fountain holes 21 via the water-feeding pipes 18.

Since the ice making small chamber 12 is cooled to below the freezing point by the operation of the refrigerating system, a part of the ice making water jetted and supplied into the small chamber begins to be frozen in layers on the inner wall surface of the ice making small chamber 12. The unfrozen water drops from the return hole of the water tray 16 and is collected in the ice making water tank 14. When this ice making operation progresses and complete ice cubes are generated in the ice making compartment 12,
This is detected by an appropriate detection means, and an ice making completion signal is issued to stop the ice making operation. Then, the 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 to melt the ice formed between the inner wall surface of the ice making small chamber 12 and the ice cubes. And the water tray 16 at the required timing
Tilts to open the lower opening of the ice making compartment 12, and the hot gas continuously supplied gradually melts between the inner wall of the ice making compartment 12 and the ice cubes. As a result, the ice cubes fall from the ice making compartment 12 under their own weight, slide the water tray 16 obliquely downward, and are stored in an ice storage (not shown).

In the ice making mechanism of the water circulation type automatic ice making machine as the open cell system, as shown in FIG. 4, an ice making tray 40 is horizontally arranged above the inside of the ice making machine main body, and the ice making tray 4 is
0 has a plurality of through holes 40a that open vertically. An ice making chamber 42 is adhered to the upper surface of the ice making tray 40 in correspondence with each of the through holes 40a.
An ice-making small chamber 44 that opens downward through 0a is defined. An evaporator 46, which communicates with a refrigerating apparatus (not shown), is firmly attached to the upper surface of each ice making chamber 42. Further, below the ice tray 40, a storage tray 48 that receives the ice cubes formed in each of the ice making small chambers 44 and collects the ice cubes in the ice storage is arranged at an inclination at a predetermined angle, and further below the ice tray. A water tank 50 is provided. In the storage plate 48,
A sprinkling hole 48a that allows the injection and supply of ice making water to each ice making small chamber 44, and a plurality of return holes 4 for collecting unfrozen water that has not been frozen in the ice making small chamber 44 into the ice making water tank 50.
8b is provided. The ice making water in the ice making water tank 50 is pressure-fed to a water sprinkling pipe 52 arranged at a position corresponding to the water sprinkling hole 48a through a pump (not shown) arranged inside the tank, and the large number of ice making water is supplied. It is adapted to be uniformly jetted and supplied to the inner surface of the small chamber 44.

Since each ice making chamber 44 is cooled below the freezing point by the evaporator 46 during the ice making operation, the sprinkling pipe 5
The ice making water jetted and supplied from 2 gradually starts to freeze on the inner surface of each ice making small chamber 44. The unfrozen water that has not been frozen in the ice making compartment 44 is collected in the ice making water tank 50 through the return hole 48b formed in the storage tray 48 and is recycled again. As the ice making operation proceeds, the ice making chamber 4
When ice cubes are generated at 4, ice temperature completion is detected by the temperature sensor, the ice making operation is stopped, and hot gas is supplied to the evaporator 46 to melt the frozen surface of the ice cubes against the ice making small chamber 44. Ice is dropped from the ice making chamber 44. The ice cubes slide down on the storage tray 48 and are stored in the ice storage via the illustrated ice drop port 54.

[0009]

In the above-mentioned jet type automatic ice making machine, since the ice cubes are discharged and dropped from the ice making chamber 10 in a short time during the deicing operation, the lower end of the ice making chamber 10 and the water tray 16
A configuration is adopted in which a small gap is provided between the surface of the ice cube and the ice cubes are connected to each other by forming an ice layer having a required thickness in this gap. In other words, the ice making compartment 1
When the icing surfaces of 2 and the ice cubes are melted, the weights of all the ice cubes that are connected to each other act in a direction of separating the ice cube group from the ice making chamber 10, thereby promoting deicing. By the way, in the structure 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 an ice layer, the ice layer is firmly frozen on the surface of the water tray when the ice making is completed. Moreover, since the water tray 16 itself is made of a material having high rigidity, when the water tray 16 is tilted during deicing operation, the ice layer and the ice tray 16 are separated at one time.
There is a problem that an excessive load is applied to the water tray 16 and its tilting mechanism (actuator, etc.), and the ice cubes cannot be taken out in a good state.

In the automatic ice making machine, during the deicing operation, water is removed for the purpose of promoting separation of the ice layer from the water tray 16 and melting and removing ice pieces remaining on the surface of the water tray 16. Plate 16
The deicing water is sprinkled and supplied to the entire surface of the water tray 16 from a sprinkler (not shown) disposed above the pivotal support portion in the. However, in this case, it is pointed out that a large amount of deicing water is used and running cost is increased.

Therefore, as shown in FIG. 3, a resin plate 30 for peeling is provided on the surface of the water tray 16 for peeling, which is made of a material having a property in which ice blocks are hard to adhere and having flexibility. A configuration is adopted that reduces the peeling force between the ice layer and the water tray 16 during 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 and the resin plate 30 are not strongly frozen, and the water tray 16
When tilted, the resin plate 30 bends and is gradually separated from the ice layer, so that it is possible to prevent an excessive load from being applied to the tilting mechanism of the water tray 16 or chipping of ice cubes. .

However, the problem here is that when the water tray 16 tilts in the deicing operation, the resin plate 30 remains bent, and the lower surface of the resin plate 30 and the water tray surface are Is to create a gap between them. If the deformed state of the resin material 30 is not completely restored even if the water tray 16 is rotated to the ice making position after all the ice cubes in the ice making chamber have fallen, the water is jetted from the fountain hole 21. The ice-making water enters the gap between the resin plate 30 and the surface of the water tray and freezes. When the temperature of tap water is high, as in summer, the temperature of the ice making water supplied to the ice making room is relatively high, so the ice in the gap is melted at the beginning of the next ice making operation. When the temperature of ice-making water becomes low like this, the ice in the gap part remains without being melted. Then, 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 is lifted from the surface of the water tray.

That is, when the water tray 16 is exposed to the ice making position, the partition plate 11 and the resin plate 3 arranged in the ice making chamber 10 are arranged.
The gap between the resin plate 30 and the partition plate 11 becomes narrower.
By contacting with, the thin portion of the ice layer or the portion where the ice layer is not formed at all is generated. In this case, the thin ice layer is melted in the initial stage of the deicing operation, and the ice cube groups connected by the ice layer are separately formed with the part where there is no ice layer as a boundary. Therefore, the divided ice cubes are separately released with a required time difference according to the progress of the deicing operation according to the weight thereof, and all the ice cubes generated in the ice making chamber 10 are released. However, there was a problem that the ice cube production capacity of Nissan was reduced. Further, in the ice making machine, the temperature rise of the ice making chamber 10 caused by the release of ice cubes from the ice making chamber 10 is detected to control the completion of the deicing operation. It is also pointed out that if the ice groups are non-uniformly released, the degree of temperature rise varies depending on the release state, and the deicing completion detection becomes uncertain.

Further, if the ice cubes are discharged non-uniformly and the deicing operation becomes longer than necessary, the ice cubes that have been delayed in release will be excessively melted to become deformed ice or become thin and uneven in size. It is pointed out that there are difficulties. Further, when the ice in the gap between the resin plate 30 and the water tray 16 grows significantly by repeating the ice making operation and the deicing operation, the resin plate 30 causes the ice making chamber 12
There is also a problem of hitting the lower end of the hard disk and causing damage.

In the water circulation type automatic ice making machine, the sprinkling pipe 52 is used.
The ice-making water jetted from is supplied to the ice-making small chambers 44 of the ice-making chambers 42 through the through holes 40a of the ice-making tray 40, and gradually starts to freeze from the inner surface side of the ice-making small chambers 44. Therefore, by the time solid ice cubes are generated in the ice making chamber 44, an ice layer that freezes on the inner surface side of the ice making chamber 44 grows from the opening edge of the ice making chamber 42 to the outside, and The through hole 40a and its lower surface were frozen (two-dot chain line in FIG. 4). It should be noted that the ice making chamber 42 is formed of a metal such as aluminum which is a good heat conductor, whereas the ice tray 40 is generally formed of a resin material which is a poor heat conductor. For this reason,
When hot gas is circulated in the evaporator 46 during the deicing operation, the ice making chamber 42 is rapidly heated, and the ice-making surface of the ice cubes in the ice making small chamber 44 is melted, but heat is difficult to be transmitted to the ice making tray 40. , Through hole 40 of ice tray 40 in ice cubes
There is a problem that it takes a long time for the portion a and the portion frozen on the lower surface to melt, the deicing time becomes long, and the ice-making capacity of the ice cubes decreases. In addition, it takes time for the freezing portion between the ice cubes and the ice tray 40 to melt, so that the ice making compartment 4
It is also pointed out that the ice cubes in 4 melt excessively and become deformed ice or become thin.

[0016]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned drawbacks inherent in the automatic ice maker, and it is possible to produce a good-quality ice mass having a well-shaped shape. Another object of the present invention is to provide an automatic ice making machine capable of improving the Nissan ice making capacity by shortening the deicing time.

[0017]

In order to solve the above problems and achieve the intended purpose, the present invention provides an ice making chamber defining a large number of downwardly opening ice making chambers, and the ice making chambers from below. The ice making water in the ice making water tank is provided with a water tray having a fountain hole and a return hole corresponding to each ice making small chamber, and an ice making water tank integrally formed below the water tray. Injects water from the fountain hole into the ice making chamber to freeze the indoor wall surface, and returns unfrozen water to the ice making water tank through the return hole to generate ice blocks, and switches to deicing operation after ice making is completed. In an injection-type automatic ice maker configured to tilt the water tray and the ice making water tank to perform deicing, at least a component portion of the water tray facing the ice making chamber is an additive material having a property that ice lumps are hard to adhere. The required percentage The mixed resin material, characterized in that molded.

In order to solve the above-mentioned problems and to achieve the intended purpose, another invention of the present application is to provide a plurality of ice making chambers defining downwardly opening ice making small chambers and an array of through holes which are opened vertically. And an ice making tray in which the ice making chambers are bonded so as to correspond to the through holes, an ice making water tank arranged below the ice making tray, and the ice making water in the ice making water tank is made into the ice making water. It is equipped with a sprinkling pipe for spraying to the ice making chamber of the room, and the ice making water in the ice making water tank is directly supplied to each ice making small chamber through the sprinkling pipe to freeze the interior wall surface, and the uniced water is the ice making water. In a water circulation type automatic ice maker configured to return to the tank to generate ice blocks, the ice making tray was formed of a resin material in which an additive material having a property in which ice blocks are difficult to adhere is mixed in a required ratio. Characterize.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the automatic ice making machine according to the present invention will be described with reference to the accompanying drawings showing preferred embodiments.
This will be described in detail below. The same members as those described in the related art with reference to FIGS. 3 and 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

[0020]

[About the First Embodiment] FIG. 1 shows a water tray of an injection type automatic ice making machine according to the first embodiment.
Is a water supply passage 18 that opens downward and communicates with the water fountain 21 and a lateral side of the flat plate portion 56 in which the water fountain 21 and the return hole corresponding to the ice making small chamber 12 are formed. And a water tray main body 58 having a pressure chamber 26 communicating therewith, and an opening 18a of the water supply passage 18 in the main body 58.
Water channel lid 60 that is adhered to close the pressure chamber 26 and the pressure chamber 26
Pressure chamber lid 6 adhered to close the opening 26a of the
2 and. The water tray main body 58 as a component of the water tray 16 has a property that ice blocks are unlikely to adhere to the base material A.
It is formed of a resin material in which the additive material B (having a property of easily peeling ice blocks) is mixed in a required ratio. This base material A
As the material, a resin material having shape, strength, dimensional accuracy and adhesiveness, such as ABS, AES, AS or acrylic, is preferably used. Further, as the additive material B, a fluorocarbon resin, silicon, a fluororesin, or the like, which has a property that ice blocks are unlikely to adhere, is preferably used. The water channel lid 60 and the pressure chamber lid 62 are formed of only the base material A. Moreover, the mixing ratio of the additive B to the base material A is appropriately set between about 2 and 30%.

As described above, since the water tray main body 58 is formed of the resin material in which the base material A and the additive material B are mixed,
A waterway lid 60 formed of only the base material A on the water tray body 58
Also, the pressure chamber lid 62 can be bonded so as to prevent water leakage. In addition, the water tray body 58 facing the ice making chamber 10 has a property that the ice block is unlikely to adhere to the additive material B.
Since it has the property of easily peeling off ice blocks, the ice layer that connects the ice cubes generated in the ice making compartment 12 during the ice making operation does not strongly freeze on the surface of the water tray body 58. The water tray 16 tilted by the tilting mechanism during the deicing operation is smoothly separated from the ice layer, and it is possible to prevent an excessive load from being applied to the tilting mechanism or the lower end of the ice cubes from being damaged.

Although it is possible to mold the water tray body 58 only with the additive material B, in this case, the water tray body 58 and the water channel lid 60 and the pressure chamber lid 62 cannot be bonded. In order to fix each member in a watertight manner, a means such as a screw or a packing is required, the number of parts is increased, and water leakage may occur due to deterioration over time, which is not practical. Moreover, since the additive B has a high cost, there is a drawback that the cost of the entire water tray increases. Further, because of the structure of the water tray 16, the entire water tray cannot be integrally formed by injection molding, and therefore the entire water tray cannot be formed only by the additive material B.

[0023]

[Operation of First Embodiment] Next, the operation of the jet type automatic ice making machine according to the first embodiment will be described. In the jet type automatic ice maker, when the ice making operation is started, the ice making water tank 14
The ice-making water inside is pressure-fed to the water tray 16, and is spray-supplied to the ice-making small chamber 12 through each fountain hole 21. Since the ice making small chamber 12 is cooled by the refrigerant supplied from the refrigeration system to the evaporator 13, the ice making water contacts the inner wall of the ice making small chamber 12 and is gradually cooled, and the ice making water tank is returned through the return hole. Return to 14.

As the ice making operation progresses, the ice making chamber 12
Part of the ice making water begins to freeze on the inner wall surface of the, and finally solid ice cubes are produced. At this time, the water tray main body 58 that closes the ice making chamber 10 from below has a property that ice blocks are unlikely to adhere (property to easily separate the ice blocks). The ice layer formed in the gap provided between the surface of the main body 58 and the surface of the main body 58 can be prevented from being strongly frozen on the surface of the water tray main body 58. When the ice cubes are completely formed, the temperature of the ice making chamber 10 drops. Therefore, the ice making operation is stopped by detecting this by the appropriate detecting means, and the ice making is completed. 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. Further, the tilting mechanism operates at an appropriate timing, and the water tray 16 starts tilting about the support shaft 17. At this time, since the water tray body 58 has a property that the ice blocks are easily peeled off, the water tray 16 is smoothly peeled off from the ice layer connecting the ice cubes. As a result, the tilting mechanism is not overloaded and the ice cubes are not damaged.

When hot gas is circulated and supplied to the evaporator 13, the ice-making surfaces of the small ice making chambers 12 and the ice cubes are melted. At this time, the ice cubes are connected to each other by an ice layer formed at a lower end thereof with a constant thickness, and all the ice cubes are separated and dropped from the ice making compartment 12 at a time, so that the ice cube group can be quickly removed from the ice making compartment 12 in a short time. It can be released from the ground and can improve the Nissan ice making capacity. Since no resin plate is provided on the surface of the water tray 16, it is possible to always secure a uniform gap between the surface of the water tray 16 tilted back to the ice making position and the lower end of the ice making chamber 10. The ice layer formed in the gap can connect all the ice cubes generated in the ice making chamber 10 to each other. Further, since all the ice cubes fall at one time during the deicing operation, it is possible to obtain ice cubes having a regular shape and size. Further, as compared with the conventional structure in which a resin plate or the like is provided as a separate member on the surface of the water tray 16, the number of parts and the number of assembling steps do not increase, and the manufacturing cost can be kept low. Become.

[0026]

[Experimental Example] The water tray main body 58 is made of ABS (base material A) composed of about 30% acrylonitrile, about 20% butadiene rubber and about 50% styrene, and silicon (additive B). The first experimental example was molded from a resin material containing 2% of acrylonitrile, about 30% of acrylonitrile and about 2% of ethylene rubber.
A second experimental example in which a resin material obtained by adding 2% of silicon (additive material B) to AES (base material A) having a composition of 0% and styrene of approximately 50%, and ABS
RT (room temperature) =
Water tray 1 at the time of deicing operation with a jet type automatic ice maker under the conditions of 20 ° C and the completion point of ice making (temperature at the center of the evaporator) = -30 ° C.
The results of measuring the peeling force applied to 6 are shown in the following table.

[0027]

From the above-mentioned experimental example, it was found that the peeling force between the ice cubes and the water tray 16 becomes extremely small by mixing the base material A with the additive material B.

[0029]

[Second Embodiment] FIG. 2 shows an ice tray of a water circulation type automatic ice making machine according to the second embodiment, wherein the ice tray 40 is made of ABS, AES, AS, acrylic, or the like. Molded with a resin material obtained by mixing an additive material B having a property that an ice lump such as a fluorocarbon resin, silicon, or a fluororesin hardly adheres to the base material A (property for easily peeling the ice lump) at a required ratio. It was done. That is, by forming the ice tray 40 with a resin material in which the base material A and the additive material B are mixed, the ice making chamber 42 can be adhered to the ice tray 40 without water leakage, and the ice making chamber 42 The ice layer grows downward from the bottom edge, and the ice tray 40
It is possible to prevent strong freezing.

[0030]

[Operation of Second Embodiment] Next, the operation of the water circulation type automatic ice making machine according to the second embodiment will be described. In the water circulation type automatic ice making machine, the ice making water in the ice making water tank 50 is sprinkled on the water pipe 5.
Along with the progress of the ice-making operation in which the ice-making small chambers 44 are jetted and supplied via 2, the ice-making water partially starts to freeze on the inner wall surface of the ice-making small chambers 44, and finally solid ice cubes are generated. . At this time, since the ice tray 40 has a property that ice blocks do not easily adhere (property to easily separate the ice blocks), the ice making chamber 44
The ice layer hardly grows on the lower surface of the ice tray 40 and the through hole 40a below the lower edge of the ice tray 40.
It does not freeze strongly. Therefore, when the ice making chamber 42 is heated in the deicing operation, the ice-making surface with the ice cubes frozen in the ice making small chamber 44 is melted and the ice cubes fall in a short time. As a result, the deicing time can be shortened and the Nissan ice making capacity can be improved. In addition, since it takes time for the freezing portion between the ice layer and the ice tray 40 to melt, the ice cubes in the ice making compartment 44 do not excessively melt and become deformed ice or become thin. , You can get ice cubes with a regular shape.

[0031]

As described above, according to the automatic ice making machine of the present invention, in the injection type automatic ice making machine, the water is formed by the resin material in which the additive material having the property that the ice blocks are hard to adhere is mixed in the required ratio. Since the plate is molded, it is possible to prevent the ice block generated in the ice making chamber and the water plate from being strongly frozen,
It is possible to prevent an excessive load from being applied to the tilting mechanism at the time of opening the water tray in the deicing operation, and to prevent the ice block from being chipped. Further, since the ice blocks formed in the ice making chamber are less likely to freeze on the water tray, the peeling force when the water tray is opened is reduced, and the output of the drive mechanism of the tilting mechanism can be reduced, which reduces the cost. Energy saving can be achieved while gaining. Furthermore, since the amount of ice accretion remaining on the surface of the water tray is extremely small, the amount of deicing water used during deicing operation can be reduced, and the running cost can be reduced.

Further, since a uniform gap can always be secured between the surface of the water tray and the lower end of the ice making chamber, all ice cubes produced in the ice making chamber by the ice layer formed in the gap. The ice cubes can be dropped and released from the ice making chamber in a short period of time by connecting to each other, and the Nissan ice making capacity can be improved. Since the entire water tray is not molded with an expensive additive material but is molded with a resin material in which the additive material is mixed with the base material in a required ratio, the material cost can be kept low. Moreover, since the same molding machine and mold as the conventional one can be used for molding the water tray itself, there is an advantage that it can be carried out without investing new equipment.

Further, in the water circulation type automatic ice making machine, since the ice making tray is formed by the resin material in which the additive material having the property that the ice blocks are hard to adhere is mixed at the required ratio, the through hole below the lower edge of the ice making small chamber or The ice layer hardly grows on the lower surface of the ice tray, and the ice layer does not solidly freeze on the ice tray. Therefore, the deicing time does not become long due to the time required for the frozen portion between the ice layer and the ice tray to melt, and the deicing time can be shortened to improve the Nissan ice making capacity. . Further, the ice cubes in the ice making chamber are not melted excessively to become deformed ice or become thin, and the ice cubes having a regular shape can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded sectional view showing a water tray of an injection type automatic ice making machine according to a first preferred embodiment of the present invention.

FIG. 2 is a sectional view showing an ice tray of an automatic water circulation type ice making machine according to a second preferred embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an ice making mechanism of an injection type automatic ice making machine according to a conventional technique.

FIG. 4 is a cross-sectional view showing an ice making mechanism portion of a water circulation type automatic ice making machine according to a conventional technique.

[Explanation of symbols]

10 ice maker, 12 ice maker, 14 ice water tank, 16
Water tray, 18 water supply channel 18a opening, 21 fountain hole, 26 pressure chamber, 26a opening, 40 ice tray 40a through hole, 42 ice making chamber, 44 ice making small chamber, 50 ice making water tank, 52 sprinkling pipe 58 water tray body ( Component part), 60 water channel lid, 62 pressure chamber lid

Claims (4)

[Claims] 1. An ice making chamber (10) which defines a large number of downwardly opening ice making chambers (12), and the ice making chamber (12) is closed from below so that it can be tilted and opened, and each ice making chamber (12) is closed. ) Corresponding to the fountain hole (21) and a return hole, and a water tray (16), and an ice making water tank (14) integrally formed under the water tray (16), the ice making water tank (14) The ice making water of is spray-supplied from the fountain hole (21) to the ice making small chamber (12) to freeze the indoor wall surface, and uniced water is made through the return hole to the ice making water tank (14).
It is returned to the inside to generate ice blocks, and after the ice making is completed, it is switched to deicing operation and the water tray (16) and the ice making water tank (14) are tilted to perform deicing. In the machine, at least the component part (58) facing the ice making chamber (10) in the water tray (16) is characterized by being formed of a resin material in which an additive having a property that ice blocks are difficult to adhere is mixed at a required ratio. And an automatic ice machine. 2. The water tray (16) has a water passage (1) in which the fountain hole (21), the return hole and the fountain hole (21) communicate with each other and open downward.
8) is formed, and the water tray main body (58) in which the pressure chamber (26) is formed in which the water passage (18) communicates with and opens laterally, and the water passage (58) in the water tray main body (58). Water channel lid (60) adhered so as to close the opening (18a) of 18), and adhered so as to close the opening (26a) of the pressure chamber (26) in the water tray body (58). A pressure chamber lid (62) and at least the water tray body.
The automatic ice making machine according to claim 1, wherein (58) is molded from a resin material in which a base material having a shape, strength, dimensional accuracy, and adhesiveness is mixed with an additive material having a property that ice lumps are hard to adhere at a required ratio. 3. A plurality of ice making chambers (42) defining a small ice making chamber (44) opening downward and a through hole (40a) opening vertically are formed in a required arrangement, and each ice making chamber (42) ) Is each through hole (40a)
The ice tray (40) and the ice tray (4
0) the ice making water tank (50) arranged below, and the ice making water in the ice making water tank (50) the ice making small chamber (44) of each ice making chamber (42)
Each of the ice making chambers (44) is provided with a sprinkling pipe (52) for jetting and supplying the ice making water in the ice making water tank (50) through the sprinkling pipe (52).
In the water circulation type automatic ice maker configured to directly supply ice to the indoor wall surface for freezing, and to return unfrozen water to the ice making water tank (50) to generate ice blocks, the ice tray (40) is An automatic ice-making machine characterized by being formed from a resin material in which an additive material having a property that ice lumps are hard to adhere is mixed in a required ratio. 4. The additive material having a property that the ice blocks are unlikely to adhere is
A fluorocarbon resin or silicone.
The automatic ice maker according to 2 or 3.