JPS6186544A - Cylindrical evaporator for 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 [Field of Industrial Application] The present invention relates to a cylindrical evaporator in an auger ice maker.

[Conventional technology]

Conventionally, mainly for the purpose of reducing manufacturing costs, it has been proposed that the cylindrical evaporator has a double-tube structure consisting of an inner cylinder part and an outer cylinder part, and the refrigerant inlet pipe and outlet pipe are directly attached to the outer cylinder part. Ta. In this cylindrical evaporator, the refrigerant supplied from the refrigerant inlet pipe passes through the annular gap between the inner and outer cylinder parts and exits the evaporator from the refrigerant outlet pipe. As the refrigerant tries to flow through the passage, the flow of refrigerant within the annular cavity becomes a flow biased toward the refrigerant inlet pipe and outlet pipe, resulting in a decrease in the evaporative heat transfer area and the creation of an area on the ice-making surface where no ice forms. However, the amount of ice produced was drastically reduced. In other words, the ice-making surface on the side where the refrigerant inlet pipe and the refrigerant outlet pipe are provided is sufficiently cooled, but the ice-making surface on the opposite side is not sufficiently cooled.

[Problems to be solved by the invention 1:J1] Therefore, the conventional two-tube type evaporator has a problem in terms of ice-making efficiency, and is merely a proposal and cannot be put to practical use.

[Failure to solve the problem]

The purpose of the present invention is to provide a means for quickly solving the above-mentioned problems, and the purpose of the present invention is to cause ice-making water to flow down a cylindrical ice-making surface, and to peel off the ice that has formed on the ice-making surface using a rotating blade. In a cylindrical evaporator for an ice making machine, an inner cylinder member and an outer cylinder member are disposed coaxially with an annular cavity therebetween, and the evaporator is in fluid communication with the annular cavity. Each upper and lower annular chamber includes an upper annular chamber and a lower annular chamber disposed at the upper and lower ends of the container, and a refrigerant outlet pipe and a refrigerant inlet pipe connected to the upper and lower annular chambers in fluid communication, respectively. A plurality of small holes are bored at equal intervals in the circumferential direction in the circumferential wall defining the space, and the refrigerant fluid is communicated between each of the upper and lower annular chambers and the annular cavity through the small holes. It is characterized by this.

[For production]

In the above configuration, the refrigerant supplied from the refrigerant artificial pipe is guided radially throughout the annular cavity from each small hole in the lower annular compartment, and the refrigerant in the annular cavity is guided through each small hole in the upper annular compartment. By leading the refrigerant to the outlet pipe through the refrigerant, a substantially uniform flow of the refrigerant within the annular cavity is obtained, and the ice is uniformly frozen over the entire ice making surface.

〔Example〕

Hereinafter, the cylindrical evaporator structure for an ice maker according to the present invention will be described in detail with reference to the drawings.

What is indicated by the symbol l in the drawings is an evaporator having a generally cylindrical shape as a whole, and the cylindrical evaporator/is arranged coaxially and cooperates to form a predetermined annular cavity/a. It is composed of an inner cylinder member and an outer cylinder member 3 having different diameters, and a pair of annular flange members are provided at both ends of the inner cylinder member and the outer cylinder member 3.
is provided.

The annular cavity /a is held in a closed state by each flange member +, g, and the extension portion tIa, *a of each of these flange members 4, 4t includes an upper annular member and a lower annular member having an annular shape as a whole. A member 6 is integrally provided. The circumferential walls 7, 7, the flange members, and the upper and lower annular members S, 6 forming part of the outer cylinder member 3 form an upper annular chamber and a lower annular chamber D.

Each circumferential wall 7.7 has, as shown in FIGS. 7 and 2,
radially along each circumferential wall 7,7, and.

A large number of small holes i are spaced at equal intervals in the circumferential direction.

The upper annular member S of the upper annular chamber g is integrally provided with a refrigerant outlet pipe 11, and the lower annular chamber B of the lower annular chamber 9 is integrally provided with a refrigerant inlet pipe 7.2. It is provided.

A water sprinkler tank/3 is arranged on the axial center of the cylindrical evaporator/, and the water sprinkler pipe/, 7a of this water sprinkler 13 connects to the ice making surface 1b formed on the inner peripheral surface of the cylindrical evaporator/. The structure is such that water can be sprinkled at the top of the tank.

Furthermore, the configuration shown in FIG. 3 shows another embodiment of the present invention, in which an annular gap is formed between each inner cylinder member and outer cylinder member 3 constituting the cylindrical evaporator l. A connecting plate 7a constituting an annular circumferential wall 7 is integrally attached to the upper and lower parts of /a.
And Francita, the upper and lower annular chambers,? is formed on the outer cylinder member J.

A refrigerant outlet pipe l/and a refrigerant inlet pipe l are respectively formed.

Note that the upper and lower annular chambers may be arranged inside the inner cylinder member, and the outer peripheral surface of the outer cylinder member may be used as the ice-making surface.

In the above configuration, when using the cylindrical evaporator according to the present invention by flowing the refrigerant, the refrigerant supplied from the refrigerant inlet pipe is larger than the refrigerant passage cross-sectional area of the small hole 10. Since the air is introduced into the lower annular chamber D having a cross-sectional area, the pressure inside the lower annular chamber 9 becomes almost constant throughout, and the air is uniformly blown into the annular cavity la through the radially arranged small holes 10. The ice-making surface 1b is cooled almost uniformly over the entire circumference, and then the refrigerant reaches the small hole 10 in the upper part again, and as described above, the pressure equalization effect is obtained by the small hole 10 and the upper annular small chamber zone. As a result, the refrigerant is sent from the lower annular chamber g to the refrigerant outlet pipe almost uniformly through the annular cavity /a through the small hole IO.

As described above, when the ice-making water is sprinkled from the water sprinkling pipe 13a with the entire ice-making surface 1b sufficiently and uniformly cooled over its entire circumference, ice of a uniform thickness is frozen over the entire 1M ice surface 1b. be done.

According to the results of the experiment, a small hole was provided in either one of each annular small chamber. It was found that a fairly uniform flow of the refrigerant could be obtained even in the case where the refrigerant flow was completely uniform, and it was found that when small holes were provided on both sides as in the example, it was completely sufficient.

〔Effect of the invention〕

Since the cylindrical evaporator structure for an ice cream machine according to the present invention has the above-described configuration and operation, the refrigerant flows uniformly within the star-shaped cavity, and as a result, the ice-making surface is uniformly cooled. Ice of a fairly uniform thickness is formed over the entire ice making surface, greatly improving the ice making capacity and the reliability of the ice making machine, as well as having a simple structure. Therefore, manufacturing costs can be significantly reduced.

[Brief explanation of drawings]

The drawings are for showing the structure of the cylindrical evaporator tank according to the present research. Fig. 1 is a schematic sectional view showing the overall structure with the right side omitted from the axis center, and Fig. 2 is a cross-sectional view taken along the line A-A in Fig. 1. Cross-sectional view, FIG. 3 is a cross-sectional view showing another embodiment. l is a cylindrical evaporator, /a is an annular cavity, /1) is an ice-making surface, C is a cylindrical member, 3 is an outer cylinder member, Da is a flange member, 3 is an upper annular member, 6 is a lower annular member, 7 is the circumferential wall,
? a is the connecting plate, g is the upper annular chamber, ri is the lower annular chamber,
io is a small hole, 11 is a refrigerant outlet pipe, and /2 is a refrigerant inlet pipe. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A cylindrical evaporator for an ice-making machine that produces ice by causing ice-making water to flow down a cylindrical ice-making surface (1b) and peeling off the frozen ice on the ice-making surface using a rotating blade, with an annular void space in between. (1a
) and are disposed at the upper and lower ends of the evaporator in fluid communication with the annular cavity (1a). an upper annular chamber (8) and a lower annular chamber (9), and a refrigerant outlet pipe (11) and a refrigerant inlet pipe (12) connected in fluid communication to the upper and lower annular chambers (8, 9), respectively. A plurality of small holes (10) are bored at equal intervals in the circumferential direction in the circumferential wall (7) defining each of the upper and lower annular small chambers (8, 9),
A cylindrical evaporator for an ice making machine, characterized in that a refrigerant fluid is communicated between each of the upper and lower annular chambers (8, 9) and the annular cavity (1a) through the small hole (10).