JPH07260301A - Cooler for icemaker - Google Patents

Abstract

PURPOSE:To provide a cooler for an icemaker which is scarcely affected by heat when members are connected by metal having a low melting point. CONSTITUTION:An outer frame of an icemaking chamber 1 of a cooler R is formed by engaging cutouts 7 formed at both ends of outer frame plates 3, 4, 5 with each other and coupling a plurality of the plates. An intermediate frame 11 disposed in the frame is formed by engaging cutouts of intermediate frame plates 13 with each other and coupling a plurality of the intermediate frame plates. A caulking hole for locking protrusions 9 formed at the outer and intermediate frames are formed at a cover plate. The outer and intermediate frames are coupled to one surface of the cover plate by inserting the protrusions into the holes and caulking them, a cooler pipe 31 is disposed on the other surface of the plate, and the pipe, the plate are coupled to the outer and intermediate frames and coupled parts by metal having lower melting point than those of the members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooler in an ice making device which cools an ice making chamber divided into a large number of ice making chambers and circulates ice making water in the ice making chamber to make ice.

[0002]

2. Description of the Related Art A conventional cooler in this type of ice making apparatus is disclosed in, for example, Japanese Patent Laid-Open No. 4-309769 (F25C).
1/22) and the like. The ice-making chamber of the cooler in such a conventional ice-making device is configured by bending the ends of a rectangular flat plate of phosphorous deoxidized copper vertically by pressing to form a box.

Then, the partition plates, which are connected by engaging the notches with each other and are formed in a lattice shape, are arranged inside the box, which is an ice making chamber, and the ice making chamber is divided to form a large number of ice making private chambers. There is. A protrusion is formed on the partition plate made of phosphorus-deoxidized copper, and the partition plate is fixed to the box body by fitting the protrusion into the insertion hole of the box body and caulking. Furthermore, after a cooler pipe is overlapped on this box, it is dipped in a bath containing tin as a main component (hot dip). The hot dip is surface-treated and the members are joined with tin, which is a metal having a low melting point. In this way, the cooler in the conventional ice making device is manufactured.

[0004]

By the way, during hot dipping, the box is heated by the heat of the bath (about 350 ° C.). Then, at the time of thermal expansion due to this heating, the bent portions at the corners of the box body are three-dimensionally deformed and open outward. As a result, the partition plate and the box body may not come into close contact with each other, a gap may be formed therebetween, or twisting or warpage may occur in the whole, which may cause a problem in the quality of the cooler. Further, since twisting or warpage occurs, the box body and the cooler pipe do not come into close contact with each other, the contact area decreases, and heat conduction deteriorates.

The present invention is intended to solve the above problems, and when the members are joined with a metal having a low melting point,
An object of the present invention is to provide a cooler in an ice making device that is less likely to be affected by the heat.

[0006]

In order to achieve the above object, an ice making chamber (1) of a cooler (R) in an ice making device of the present invention comprises an outer frame (2) and a cover plate (21). Has been done. The outer frame is formed by engaging a plurality of outer frame plates by engaging the notches (7) formed at both ends of the outer frame plates (3, 4, 5) with each other.

The middle frame (11) arranged inside the outer frame has a notch (1) in the middle frame plates (12, 13).
5, 18) are engaged with each other and a plurality of inner frame plates are joined together. On the other hand, on the lid plate,
Caulking holes (22) for locking the protrusions (9) formed on the outer frame and the protrusions (16) formed on the inner frame are formed.

The outer frame and the middle frame are joined to one surface of the cover plate by inserting the protrusions into the caulking holes and caulking, and the cooler pipe (31) is arranged on the other surface of the cover plate. In addition, the cooler pipe and the cover plate, the outer frame and the middle frame, and the connecting portions are joined with a metal having a lower melting point than that of the members.

The metal having a low melting point is a metal containing copper, and the surface of the cooler may be surface-treated with a metal containing tin as a main component.

[0010]

[Operation] The ice making chamber (1) of the cooler (R) is composed of an outer frame (2) consisting of outer frame plates (3, 4, 5) and a lid plate (21), and its corners. Does not have a bent part. Therefore, due to heating when joining with a metal having a low melting point, thermal deformation such as twisting or warping when the ice making chamber thermally expands is extremely small.

The metal having a low melting point may be a metal containing copper, and the surface of the cooler may be surface-treated with a metal containing tin as a main component. In this case, the thermal conductivity of the joining metal is higher than that in the case of joining with a metal containing tin as a main component, so that the thermal conductivity of the joint portion is significantly improved. Further, when a metal containing copper having no corrosion resistance is used for bonding, the corrosion resistance of the cooler is inferior, but since the surface treatment is performed with a metal containing tin as a main component, the corrosion resistance is also improved.

[0012]

[Example] Next, Example 1 of the cooler in the ice making apparatus according to the present invention will be described. FIG. 1 is a front view of a main part of an ice making device according to the present invention. 2A and 2B are views for explaining the first embodiment of the cooler in the ice making device, FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a side view. Figure 3
FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a plan view of the cooler pipe. FIG. 5 is a plan view of the lid plate. FIG. 6 is an exploded view for explaining each member forming the outer frame and the inner frame. 7A and 7B are views for explaining a state in which the outer frame and the middle frame are assembled, FIG. 7A is a plan view, and FIG. 7B is a perspective view of a main part immediately before engaging the cut portions.

The structure of the reverse cell type ice making device will be briefly described. In FIG. 1, the cooler R is fixed to the frame F of the ice making device with the opening of the ice making chamber 1 facing downward. In addition, a cooler pipe P is arranged on the upper part of the cooler R in a meandering manner. On the other hand, below the cooler R, a water tank T is attached so as to be rotatable around a rotation axis K. Water is supplied to the water tank T from a water supply pipe I via a valve B, and the water in the water tank T is jetted into the ice making chamber 1 of the cooler R by the circulation pump J via the water tray M. The sprayed water is cooled by the cooler pipe P to become ice. Then, the lever L rotates in the counterclockwise direction, the water tank T rotates in the clockwise direction with the rotation, and the ice in the ice making chamber 1 falls.

Next, the cooler R will be described. 2,
6 and 7, the outer frame 2 of the ice making chamber 1 of the cooler R
Is a pair of vertical outer frame plates 3 (Fig. 6) which are flat plates made of phosphorus deoxidized copper.
In FIG. 1, only one is shown) and the left and right lateral outer frame plates 4 and 5. These outer frame plates 3, 4, 5
A notch 7 is formed on both ends of the slab, and one or two protrusions 9 are formed on one side surface. Then, the outer frame plates 3, 4, 5 are erected vertically with the projection 9 facing up,
As shown in FIG. 7B, the rectangular outer frame 2 is assembled by engaging the cutouts 7 of the vertical outer frame plate 3 with the cutouts 7 of the horizontal outer frame plates 4 and 5.

The lattice-shaped middle frame 11 arranged inside the outer frame 2 is a horizontal middle frame plate 12 which is a flat plate made of phosphorus-deoxidized copper.
(See FIG. 6) is composed of five sheets, and the vertical middle frame plate 13 is composed of two sheets. The horizontal middle frame plate 12 has a pair of notches 15
And projections 16 are formed, and the vertical middle frame plate 13 has 5
Individual cuts 18 are formed. And the outer frame 2
Similarly, the notch 15 of the horizontal middle frame plate 12 and the notch 18 of the vertical middle frame plate 13 are engaged with each other to assemble the lattice-shaped middle frame 11. Then, the assembled middle frame 11 is fitted into the outer frame 2, and as shown in FIG.
Are partitioned to form a large number of ice making compartments 1a.

In FIG. 2, the lid plate 21 that constitutes the ice making chamber 1 together with the outer frame 2 is a rectangular flat plate made of phosphorus deoxidized copper, and has a large number of caulking holes 22 as shown in FIG. . The projection 9 of the outer frame 2 and the middle frame 1 are fitted into the caulking holes 22.
The protrusion 16 of 1 is inserted and crimped, and the outer frame 2 and the middle frame 11
And the lid plate 21 are joined together.

On the upper side of the ice making chamber 1, a meandering cooler pipe 31 made of phosphorus deoxidized copper shown in FIG. 4 is superposed, fixed by a jig not shown, and then immersed in a bath containing tin as a main component. (Hot dip). By this hot dip, the surface of the cooler R is covered with a tin layer for surface treatment, and the tin joins the respective members. In this way, the cooler in the ice making device is manufactured. The cooler pipe 31 shown in FIGS. 2 to 4 is smaller in size than the cooler pipe P shown in FIG. 1, and the number of meandering times is small.

At the time of this hot dip, the outer frame 2 and the lid plate 21 corresponding to the box body of the conventional example are heated from room temperature to about 350 ° C. and expanded by the molten tin of about 350 ° C. in the bath. Since the outer frame plates 3, 4, 5 and the lid plate 21 that form the outer frame 2 are plate-shaped, particularly flat plates and expand two-dimensionally, thermal deformation such as twisting or warping is extremely small.

Next, a second embodiment of the cooler in the ice making device according to the present invention will be described. FIG. 8 is a layout view of a brazing material when brazing a cooler in a furnace. In the description of the second embodiment, constituent elements corresponding to those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

Similar to the first embodiment, the outer frame 2 and the middle frame 11
The cover plate 21 and the cover plate 21 are caulked and joined together, and the brazing material 41 was connected to the cooler pipe 31 as shown by the alternate long and short dash line in FIG.
The brazing material 42 is disposed between the outer frame 2 and the middle frame 11 between the cover plate 21 and the cover plate 21. Then, by brazing in the furnace, the brazing material is flowed into the gaps between the respective members to join them. Thus, in Example 2, instead of the hot dip of Example 1,
Brazing is performed in the furnace.

As the brazing materials 41 and 42, brazing materials containing copper such as foil-shaped phosphor copper braze, phosphor bronze braze, copper braze and brass braze are used. It has almost the same thermal conductivity as copper oxide, about 6 times the thermal conductivity of tin used in Example 1, and does not corrode the dough at the melting temperature of the brazing material (about 1060 ° C). The molten brazing filler metal penetrates into the gaps between the members.

In the in-furnace brazing, a cooler R in which a foil-shaped brazing material is arranged is housed in a high-temperature furnace and gradually raised from a normal temperature state to a set brazing temperature to ensure that the brazing material is sufficiently brazed. After melted and permeated into the gaps between the members, the temperature is gradually lowered, cooled to normal temperature, and taken out from the high temperature furnace.
This one cycle takes about 2 hours in the case of the batch type, and brazing is completed in about 30 minutes in the case of the continuous type.

After completion of brazing in the furnace, the cooler R
If the phosphorous deoxidized copper, which is the base material, is exposed, the corrosion resistance is poor, so tin plating is performed by a method such as electroplating to perform surface treatment.

As described above, in the cooler R in which the respective members are joined by the brazing material containing copper having a high thermal conductivity, the respective members are joined by the metal containing tin as the main component as in Example 1. The thermal conductivity is remarkably improved as compared with the cooler R.

In the second embodiment, as in the first embodiment, the ice making chamber 1 is composed of the outer frame plates 3, 4, 5 and the lid plate 21,
Since there is no bent portion in the corner portion, thermal deformation such as twisting or warping of the cooler R when heated in a high temperature furnace is extremely small.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention as set forth in the claims. It is possible to make changes. A modified embodiment of the present invention is illustrated below. (1) In the embodiment, the outer frame 2 and the middle frame 1 of the cooler R
1, the lid plate 21 and the cooler pipe 31 are made of phosphorous deoxidized copper, but can be changed to another material having a good thermal conductivity, particularly another metal. (2) Although tin is plated in Example 2, it is possible to perform surface treatment with not only tin itself but also another metal containing tin as a main component.

(3) In the embodiment, the cooler according to the present invention is adopted in the reverse cell type ice making device, but it can be adopted in other types of ice making device. (4) In the second embodiment, the brazing material 42 is arranged in a grid pattern, but if the joints of the cooler R are joined together,
The arrangement of the brazing material can be changed as appropriate.

[0028]

According to the present invention, the ice making chamber of the cooler is constructed by assembling the plate members. Therefore, there is no bent portion at the corner of the conventional box body. As a result, when joining with a metal having a low melting point, thermal deformation such as twisting or warping can be suppressed to an extremely small value.

The metal having a low melting point is a metal containing copper, and the surface of the cooler may be surface-treated with a metal containing tin as a main component. In this case,
The thermal conductivity of the joint is remarkably improved and the corrosion resistance is also improved.

[Brief description of drawings]

FIG. 1 is a front view of a main part of an ice making device according to the present invention.

2A and 2B are views for explaining the first embodiment of the cooler in the ice making device, in which (A) is a plan view and (B) is a front view.
(C) is a side view.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view of a cooler pipe.

FIG. 5 is a plan view of a cover plate.

FIG. 6 is an exploded view for explaining each member forming the outer frame and the middle frame.

7A and 7B are views for explaining a state in which the outer frame and the middle frame are assembled, FIG. 7A is a plan view, and FIG. 7B is a perspective view of a main part immediately before engaging the cut portions.

FIG. 8 is a layout view of a brazing material when brazing a cooler in a furnace.

[Explanation of symbols]

 R Cooler 1 Ice-making chamber 2 Outer frame 3 Vertical outer frame plate 4,5 Horizontal outer frame plate 7 Cut part 9 Protrusion 11 Middle frame 12 Horizontal middle frame plate 13 Vertical middle frame plate 15 Cut part 16 Protrusion 18 Cut part 21 Cover plate 22 Caulking hole 31 Cooler pipe

Claims (2)

[Claims] 1. A plurality of outer frame plates having notches at both ends, and an outer frame of an ice making chamber configured by engaging the notches of the outer frame plates to join the outer frame plates, and the notches. A plurality of middle frame plates, a middle frame arranged by engaging the notches of the middle frame plates to couple the middle frame plates, and arranged inside the outer frame; and the outer frame. A projection plate formed and a caulking hole for locking the projection formed on the middle frame are formed, and a lid plate that forms an ice making chamber with the outer frame, and a cooler pipe that cools the ice making chamber are provided. The outer frame and the middle frame are joined to one surface of the lid plate by inserting the protrusion into the caulking hole and crimping, the cooler pipe is arranged on the other surface of the lid plate, and the cooler The pipe and the lid plate, the outer frame and the middle frame, and the above-mentioned connecting parts are
A cooler in an ice making device, which is joined with a metal whose melting point is lower than that of each member. 2. The metal having a low melting point is a metal containing copper, and the surface of the cooler is surface-treated with a metal containing tin as a main component. Cooler in ice making equipment.