JPH0338612Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications This invention relates to an ice maker.

Prior Art In a conventional ice maker, parallel refrigerant passages are provided inside an ice-making substrate made of extruded material, and a number of horizontal partition walls are integrally formed with the ice-making substrate at predetermined intervals on the front surface of the ice-making substrate. Provided on the ice making board,
It is known that a large number of vertical partition plates intersecting with a horizontal partition wall are attached at predetermined intervals (for example, see Japanese Patent Laid-Open No. 145866/1983). However, in this conventional ice maker, since the size of the cross-sectional area of the refrigerant passage is constant, the heat transfer performance on the refrigerant introduction side and the refrigerant discharge side cannot be balanced, resulting in uneven surface temperature of the ice making substrate. There was a problem with the ice making ability being inferior. In other words, in general, refrigerant has a higher heat transfer coefficient when it is in a liquid state than when it is in a gas state, so in an ice maker, the heat transfer performance in the passage on the refrigerant introduction side through which the liquid refrigerant passes is greater, and this makes it more effective for heat exchange. As a result, the heat transfer performance in the passage on the refrigerant discharge side, through which a large amount of the gaseous refrigerant that has been sequentially gasified passes through, is low, and the pressure loss is large, so the ice making capacity of the ice maker as a whole is inferior and the ice making time is long. There was a problem.

Purpose of the invention The purpose of this invention is to solve the above-mentioned problems of the conventional technology, balance the thermal conductivity in the passages on the refrigerant introduction side and the same discharge side, and improve the heat transfer performance of the entire ice making board. However, it is an object of the present invention to provide an ice maker which can uniformize its surface temperature, greatly improve its ice making capacity, and which requires a very short ice making time.

Structure of the invention In order to achieve the above-mentioned object, this invention provides parallel and linear refrigerant passages inside an ice-making substrate made of an extruded aluminum material with a plurality of partition walls on at least one side, and By sequentially communicating the right and left ends of the linear refrigerant passage alternately, a meandering refrigerant passage is formed as a whole, and a refrigerant introduction pipe is connected to one end of the meandering refrigerant passage, and the other end is connected to the refrigerant introduction pipe. In an ice maker in which a refrigerant discharge pipe is connected to the refrigerant discharge pipe, the cross-sectional area of the linear refrigerant passage 3a through which the liquid refrigerant on the refrigerant introduction side passes among the parallel and linear refrigerant passages is relatively wide, and the passage 3a The pitch between the passages 3b is made wide, and the cross-sectional area of the linear refrigerant passage 3b through which the gaseous refrigerant or the gaseous refrigerant and the liquid refrigerant pass on the refrigerant discharge side is made narrow, and the pitch between the passages 3b is made narrow. The gist is the ice maker.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In this specification, front and back and left and right are based on FIG. 2, where the front refers to the left side of the drawing, the rear refers to the right side, the left refers to the back side of the drawing sheet, and the right refers to the front side of the drawing. shall be said.

In the drawings, 1 indicates an ice maker according to this invention, 2
is a vertical ice-making substrate made of extruded aluminum material, inside which there are parallel and straight refrigerant passages 3.
15 a and 3b are provided horizontally, and four horizontal partition walls 4 are provided integrally with the substrate 2 at predetermined intervals on the front surface of the substrate 2.

Among the 15 parallel and straight refrigerant passages 3a and 3b, the cross-sectional area of the five straight refrigerant passages 3a through which the liquid refrigerant on the lower refrigerant introduction side passes is relatively wide, and the cross-sectional area between the passages 3a is made relatively large. The pitch (arrangement interval) is made wide, and the cross-sectional area of the 10 straight refrigerant passages 3b through which gaseous refrigerant or gaseous refrigerant and liquid refrigerant pass through on the refrigerant discharge side is made narrow, and the pitch between the passages 3b is made narrow. is made narrower.

Although the horizontal partition wall 4 is horizontal in the left and right direction,
It is slanted slightly forward and downward in the longitudinal direction to facilitate ice removal. Oval plate fitting recesses are provided on both left and right side surfaces of the ice making substrate 2, and the ends of linear coolant passages 3a and 3b communicate with each plate fitting recess 5. 6 is ice making board 2
Communication grooves 7 are sequentially drilled alternately on the left and right to communicate the ends of the vertically adjacent straight refrigerant passages inside each of the plate fitting recesses 5 on both the left and right sides.
is a cover plate made of an aluminum brazing sheet that is fitted into each plate fitting recess 5 and has a brazing material layer on the inner surface, and the inner surface of the peripheral edge of each cover plate 7 is brazed to the bottom peripheral edge of the recess 5. As a result, a meandering refrigerant passage 3 is formed in the ice making substrate 2 as a whole.

Here, although the plate fitting recess 5 and the cover plate 7 are oval in shape when viewed from the side, they may have other shapes such as a rectangle.

In the above embodiment, an aluminum brazing sheet having a brazing material layer on the inner surface is used as the cover plate 7, but an aluminum brazing sheet having a brazing material layer on both the inner and outer surfaces may also be used. In this case, the brazing material layer on the outer surface of the cover plate 7 melts during brazing, and due to its surface tension there is a slight gap between the outer circumferential surface of the cover plate 7 and the inner circumferential surface of the plate fitting recess 5. Since the brazing filler metal penetrates into the gaps and fills the gaps with the brazing filler metal, there is an advantage that the intrusion of condensed water can be further prevented.

In addition, in FIGS. 1 and 2, 8 is a refrigerant introduction pipe connected to the lower end of the right side of the ice-making board 2;
10 is a refrigerant discharge pipe connected to the upper end of the same, and 10 is a large number of aluminum vertical partition plates attached to the ice making board 2 at predetermined intervals so as to intersect with the horizontal partition wall 4. and vertical partition plate 1
Cuts (not shown) each having a length half the width of the partition wall 4 and the partition plate 10 are provided at predetermined positions corresponding to each other.
When viewed from the front, the two are combined in a grid pattern by being fitted into each other. 1
1 is a synthetic resin water receiving guide plate placed on the upper surface of the uppermost horizontal partition wall 4; 12 is a synthetic resin water drop guide plate disposed along the lower surface of the lowermost horizontal partition wall 4; Reference numeral 13 indicates two types of cylindrical temperature sensors attached to the rear surface of the vertical ice-making board 2 without the horizontal partition wall 4, and reference numeral 14 indicates a water supply pipe placed above the ice maker 1, which is connected to the water by an annular mounting bracket 15. It is attached to the vertical part of the receiving guide plate 11. 16
17 is a horizontal cylindrical accumulator with a bottom placed on the rear side of the ice maker 1; It is something that is mediated by

In the ice maker 1, when water flows down from the water passage hole 16 of the water supply pipe 14 disposed above the ice maker 1, the water flows downward along the surface of the water receiving guide plate 11.
From its tip, it wraps around the bottom surface of the uppermost horizontal partition wall 4, flows down the surface of the vertical ice-making substrate 2, and then the surface of the horizontal partition wall 4 below this, in order. During this time, the water is cooled by heat exchange with the refrigerant in the meandering refrigerant passage 3 of the ice-making substrate 2, and ice is formed in the square space surrounded by the horizontal partition wall 4 and the vertical partition plate 10 when viewed from the front. is formed.

Generally, a gaseous refrigerant has a lower heat transfer coefficient than a liquid refrigerant, but the cross-sectional area of the passage 3b through which the gaseous refrigerant or the gaseous refrigerant and the liquid refrigerant pass is narrow, and the pitch between the passages 3b is narrow. Therefore, the flow rate of the gaseous refrigerant becomes faster, the heat transfer coefficient increases, and the heat transfer performance in the refrigerant discharge side passage 3b is significantly improved. Therefore, the heat transfer coefficients on the refrigerant introduction side and the refrigerant discharge side of the ice maker 1 are balanced, improving heat transfer performance, and making the surface temperature of the ice maker uniform as a whole, improving ice making ability and improving quality. It is possible to efficiently mass-produce ice of uniform quality and quality.

After the ice has grown sufficiently large, the ice making board 2
Hot gas is introduced into the serpentine passage 3 to slightly melt the surface of the ice, causing it to fall naturally to the front outside of the ice maker 1.

In the above embodiment, the ice making substrate 2, the cover plate 7, and the vertical partition plate 10 of the ice making device 1 are
are brazed all at once by, for example, a vacuum brazing method. It is preferable to perform alumite treatment on the surface of the ice maker 1. Also, the linear refrigerant passage 3
The cross sections of a and 3b may be square or rectangular depending on the case.

Further, in the above embodiment, this invention was applied to a so-called vertical ice maker, but this invention can be similarly applied to a horizontal ice maker.

Effects of the Invention As described above, in this invention, parallel and straight refrigerant passages 3a and 3b are provided inside the ice-making substrate 2 made of an extruded aluminum material having a plurality of partition walls 4 on at least one side, and By sequentially communicating the left and right ends of the matching linear refrigerant passages alternately, a meandering refrigerant passage 3 is formed as a whole, and a refrigerant introduction pipe 8 is connected to one end of the meandering refrigerant passage 3. In an ice maker having a refrigerant discharge pipe 9 connected to the other end thereof, the cross-sectional area of the linear refrigerant passage 3a through which the liquid refrigerant on the refrigerant introduction side passes among the parallel and linear refrigerant passages 3a and 3b is relatively In addition, the pitch between the passages 3a is made wide, and the cross-sectional area of the linear refrigerant passage 3b through which the gaseous refrigerant or the gaseous refrigerant and the liquid refrigerant pass on the refrigerant discharge side is made narrow,
Since the pitch between the passages 3b is narrow, the flow velocity of the gaseous refrigerant in the passages 3b on the refrigerant discharge side increases, and the heat transfer coefficient in the refrigerant discharge passages 3b improves. Therefore, the heat transfer coefficients on the refrigerant introduction side and the refrigerant discharge side of the ice maker 1 are balanced, the surface temperature of the ice maker is made uniform as a whole, the ice making capacity is improved, and ice of uniform quality and excellent quality can be produced. This has the effect of allowing efficient mass production in a short period of time.

[Brief explanation of drawings]

FIG. 1 is a right side view of an ice making board showing an embodiment of this invention, and FIG. 2 is a right side view of an ice maker. 1... Ice maker, 2... Ice making board, 3... Meandering refrigerant passage, 3a, 3b... Straight refrigerant passage, 4...
...partition wall.

Claims (1)

[Scope of utility model registration request] Parallel and linear refrigerant passages 3a and 3b are provided inside the ice-making substrate 2 made of an extruded aluminum material with a plurality of partition walls 4 on at least one side, and the left and right ends of the adjacent linear refrigerant passages are By sequentially connecting the left and right channels alternately, a meandering refrigerant passage 3 is formed as a whole, and a refrigerant introduction pipe 8 is connected to one end of the meandering refrigerant passage 3, and a refrigerant discharge pipe 9 is connected to the other end. In the ice maker, the cross-sectional area of the linear refrigerant passage 3a through which the liquid refrigerant on the refrigerant introduction side passes among the parallel and linear refrigerant passages 3a and 3b is relatively wide, and the pitch between the passages 3a is reduced. The ice maker has a wide cross-sectional area of linear refrigerant passages 3b through which gaseous refrigerant or gaseous refrigerant and liquid refrigerant pass through on the refrigerant discharge side, and narrow pitches between the passages 3b.