JPS61190267A - Water circulation type ice machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention: a. Field of Industrial Application The present invention relates to a water circulation type ice making device, and in particular to a water circulation type ice making device having a function of preventing the phenomenon in which fine ice or muddy water is generated immediately before ice making water freezes. It is related to.

b. Prior art Conventional water circulation type ice making devices have been described, for example, in Japanese Patent Publication Sho! by the same applicant as the present application. ;g-/! It is discussed in detail in Publication No. 701. ``Ic, the ice-making surface K of the ice-making plate, is flocculent or muddy water, usually pure water or muddy water, which is different from normal transparent ice just before freezing begins. Ice called .

Various improvements have been made to prevent this occurrence.

As one of the means for preventing the generation of such thin ice or muddy water, there is a known method of forming ice nuclei in a part of the ice making section in advance. This is because by forming ice nuclei, ice is generated around the ice nuclei, so that the ice-making water is not supercooled. As one of the devices using this means, the same applicant as the present applicant has provided, for example, a water circulation ice making device described in Japanese Utility Model Application Publication No. 58-137'l.

FIGS. 7, 8, and 9 are diagrams showing a water circulation type ice making device disclosed in Japanese Utility Model Application Publication No. 5G-2374,
An ice-making water supply pipe 3 is provided above the ice-making plate 1 from which ice-making water is discharged from an ice-making water tank. A de-icing water pipe for discharging de-icing water is attached to the inside of the upper part of the ice-making plate. A cooling pipe S serving as an evaporator through which refrigerant gas sent from a compressor (not shown) flows is provided on the inner surface of the ice-making plate. On the surface of the ice-making plate (i.e., the ice-making surface B), recesses for retaining ice-making water are formed at predetermined intervals. In the center of this recess 7,
A partition wall g is formed to prevent the eddying phenomenon from occurring within the recess 7.

In the water circulation type ice making device configured as above,
As the ice-making water flows down the ice-making surface 6, the eddying phenomenon shown by the arrow in the recess 7 is completely prevented. The temperature decreases faster than water, and ice nuclei are formed.Then, normal ice grows all over the ice making surface 6 without generating pure water or muddy water in a chain reaction around these ice nuclei. .

By the way, in the water circulation type ice making device configured as described above, although the effect in terms of preventing the generation of pure water or muddy water is excellent, since the recess 7 is formed on the ice making surface B, the generation The ice that had been washed had convexities that lowered its commercial value.

In addition, it was necessary to fabricate and process the recess 7 of an appropriate depth on the ice-making surface B, which required a lot of time to fabricate. Furthermore, the inside of the recess 7 was easily contaminated with water scale and dirt, which was extremely hygienic.

Problems to be Solved by the C0 Invention As mentioned above, in the conventional water circulation type ice making apparatus, there is a problem in that convex portions are formed in the ice, resulting in the production of ice with low commercial value. Further, there was also the problem that manufacturing and processing of the recessed portion 7 required a lot of time. Furthermore, there was also the problem that dirt easily accumulated and it was unhygienic.

The present invention has been made in order to solve these problems, and an object of the present invention is to provide a water circulation type ice-making device that can produce ice with good shape and high commercial value, and is easy to manufacture and process.

Problems that d0 invention attempts to solve The water circulation type ice making device of this invention has an ice making section de.

Evaporator attached to the back of 13! ,/! Some of the
Evaporator compared to other parts! , the refrigerant in IAr and the ice making section 9
, 13 to allow for a large amount of heat exchange.

80 Function In this invention, the ice making section 9. A part of /3 is in another ice making section 9. /Compared to part 3, the evaporator! , /, The cold heat from t is efficiently conducted and the temperature becomes low. Therefore, the ice-making water at that point is quickly cooled to below the freezing point temperature,
Ice nuclei are formed in the ice making water. After that, the ice-making water is frozen using the ice core without becoming supercooled.

Ice making department? ,/,3, normal ice is generated without producing pure water or muddy water.

f. Example Hereinafter, an example of the water circulation type ice making apparatus of the present invention will be described based on the drawings. Figure 1 is the first diagram of this invention.
FIG. 7 shows an example of this.

The same or corresponding parts as in FIG. 8 are given the same reference numerals, and the explanation thereof will be omitted. A cooling pipe S is connected to the back surface of the ice making plate, which is made of a good thermal conductor and has a smooth surface, as an ice making section, by means such as welding, in a good thermally conductive manner. The lowermost part of the evaporator S is covered with a heat insulating material 10 made of a thermally poor conductor such as a resin foam or a rubber member. Providing the heat insulating material lO at the lower part of the ice-making plate wa allows the ice-making water to be cooled more efficiently in a location where the temperature of the ice-making water is lower than in other parts.

In the water circulation type ice making device configured as described above, ice making water is ejected from the ice making water supply pipe 3, flows down along the surface of the ice making plate 9, and is collected in the water collection gutter //. It is collected in the ice making water tank. Thereafter, the ice-making water is sent to the ice-making water supply pipe 3 again by a pump means (not shown). The ice-making water is gradually cooled by the cooling action of the cooling pipe S while circulating between the ice-making water supply pipe 3 and the ice-making water link.

The ice making plate 9 is cooled by the cooling action of the cooling pipe S, and in particular, the lower part of the ice making plate 9 is cooled without waste by the action of the heat insulating material 10. Therefore, even when the temperature of the upper and middle portions of the ice making plate 9, which is not provided with the heat insulating material 1O, is 0°C or more, the temperature of the lower part of the ice making plate 9 is 0°C or less. In other words,
When the ice-making water is not in a state of freezing in the upper and middle parts of the ice-making plate, the ice-making water begins to freeze in the lower part, and ice nuclei are formed.

As a result, the ice-making water does not become supercooled, and the ice-making water on the ice-making plate 9 freezes with its ice nuclei forming a core, thereby preventing the generation of pure water or muddy water.

An ice cube plate like this? When the ice produced on the top grows to a certain size, well-known ice-making completion detection means (not shown) such as a temperature sensor and a float switch are activated, and the supply of ice-making water to the ice-making water supply pipe 3 is stopped. Stop (2. After that, deicing water is supplied to the deicing water pipe. As the deicing water flows down the back side of the ice making plate, it warms the ice making plate and melts the contact surface of the ice 12 on the ice making plate. , the ice is detached from the ice making plate 9.

FIGS. 3 and 3 show a second embodiment of the invention. In the first embodiment, a falling-type ice-making device in which ice-making water flows down over an ice-making plate has been described, but in the first embodiment, the ice-making device is an injection-type water circulation type ice-making device that injects ice-making water into each ice-making cup/3. This figure shows a case where this invention is applied to. Ice-making cup as an ice-making unit that generates ice/
3 is made of a good thermal conductor such as copper. This ice cup /3 is attached to an ice tray base /lI made of a thermally poor conductor such as resin with its opening facing down. The cooling pipe/S as an evaporator is made of a good thermal conductor such as copper and has a serpentine shape. This cooling pipe/S is securely fixed to the upper surface of the ice-making cup 13 by means such as welding for good thermal conductivity.

A refrigerant from a well-known cooling device flows through the cooling pipe ls,
Cool the ice cup 13. A water fountain device (not shown) is provided below the ice-making cup/3, and ice-making water is supplied from this water fountain device toward the ice-making cup 13. - A hollow prismatic heat insulating material 16 is fitted around the outer periphery of one or more ice making cups/3A.

During the ice making cycle, ice making water flows from the water fountain device to the ice making cup 1.
3, the ice-making water flows down inside the ice-making cup 13 and enters the ice-making water tank (not shown).
will be collected. The ice-making water is then sent from the ice-making water tank to the water fountain device, from which it is again supplied to the ice-making cup/3.

As the ice-making water circulates between the ice-making cup 13 and the water fountain device, the ice-making water is cooled by the cold heat from the cooling pipe IS, and its temperature gradually decreases. The degree of temperature drop in the ice cup/3 provided with the heat insulating material 16 is greater than that in the normal ice cup 13, as shown in FIG. This is due to the effect of the heat insulating material 16, which allows the ice to be made efficiently without the cold heat from the cooling pipes being dissipated into the outside air. This is because it conducts to A. As a result, before the ice making water freezes inside the regular ice making cup/3, the ice making cup/? In A, the ice-making water starts freezing. Then, the ice becomes a nucleus, and normal ice cubes can be obtained in the normal ice making cup 13 without generating pure water or muddy water. In addition, the inside of the ice-making cup/, 7A has become supercooled and the ice-making cup/,? Even if pure water or muddy water is generated in A, the pure water or muddy water remains within the ice making cup/7A and does not spread to the normal ice making cup 13.

In this way, when 7.3 VC ice is generated in each ice cup,
An ice making completion detection device (not shown) is activated, cooling from the cooling pipe/S is stopped, and the cooling pipe/j! Internal pressure allows hot gas to flow and enters the de-icing cycle. This hot gas melts the surface of the ice that contacts the ice cup/3, and the melted ice falls under its own weight into a water reservoir (not shown), completing the deicing cycle. Then, the ice making cycle is started again.

When we conducted an experiment on the frequency of generation of pure water or muddy water using the above configuration, we found that for the ice making cup 13 provided with insulation material /6, the ice making cup /jA occurred 3 out of 794 times.
Pure water was observed inside. On the other hand, regarding the conventional ice making cup 13 in which the heat insulating material 16 is not provided.

Generation of pure water was observed in the ice making cup 13, ice making water tank, etc. 1IO times out of 60 times.

FIG. 6 shows a modification of the heat insulating material/6.

The box-shaped insulating material 17 with an open bottom is an ice cup with a voltage of 7.3V.
C is fitted. In this case, the upper surface of the ice cup 13 is also covered with the heat insulating materials 16 and 17, so the cooling pipe 15
The cold heat from the ice cup/3VC is efficiently conducted without being dissipated into the outside air, and its insulation effect is even greater than that of the insulation material 16 shown in the second embodiment.

By the way, are the above examples all ice making parts? , /3 as a means of increasing the amount of heat exchange compared to other parts. Insulation material on part of the back of /3! 0. /b, /?
Although the description has been made regarding the case in which the following is provided, it is of course not limited to this. For example, a portion of the cooling pipe that comes into contact with the ice making sections 9, 13 may be flattened to increase the contact area between the ice making sections 9, 13 and the cooling pipe. In particular, heat exchange between the two may be improved. Also, the ice making department? , /3 and cooling pipe! ;,/! A member having particularly good heat conductivity may be used as a part of the welding member between the two parts.

g0 Detailed explanation of the invention According to this invention, by the simple operation of providing a heat insulating material of 10°/A, for example, on a portion of the back surface of the ice making sections 9, 13, pure water or muddy water can be removed during ice making. without occurring.

Produces well-shaped ice. In addition, the surfaces of the ice making units 9 and 13 are smooth and have the effect of being sanitary.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is an overall perspective view showing a second embodiment of the invention, and FIG. (l/) Figure 3 is a cross-sectional view along the ■-mV line, Figure S is a relationship diagram showing the relationship between the temperature of ice-making water and elapsed time in each member in Figure 3, and Figure 6 is 3 is a sectional view showing a modified example of the heat insulating material, FIG. 7 is a sectional view showing an example of the conventional water circulation ice making device of the present invention, FIG. 8 is a front view of FIG. 7, and FIG. It is an enlarged view of the main part of FIG. Part of the ice making water tank! ,/!・・Cooling pipe (evaporator), ・・Ice making plate (ice making section), 10°/l, 16, 1
7. Insulation material, /3. Ice making cup (ice making section).

Claims (1)

[Claims] 1. The ice making water in the ice making water tank (2) is transferred to the evaporator (5, 1
In a water circulation type ice-making device in which water is circulated and iced by circulating water to an ice-making section (9, 13) to which an ice-making unit (5) is attached, a portion of the evaporator (5, 15) is larger than the other portion of the evaporator (5). 1
, 15) and the ice making section (9, 13). 2. Part of the evaporator (5, 15), the evaporator (5, 15)
The water circulation type ice making device according to claim 1, wherein the water circulating ice making device is coated with a heat insulating material (10, 16, 17) that prevents dissipation of cold heat from the ice making device.