JPH0429950B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications This invention relates to a freezer/refrigerator evaporator.

Conventional technology In conventional freezers and refrigerators, when cooling the freezer compartment and the refrigerator compartment, a main evaporator that cools the freezer compartment and an auxiliary evaporator that cools the refrigerator compartment are used, and these evaporators are connected to the refrigerant. They were connected by a conduit. However, such conventional devices have a large number of joints, a high risk of refrigerant leakage, and a large number of parts, making manufacturing extremely troublesome and time-consuming, resulting in high manufacturing costs. arrived. In addition, since a large installation space is required, the refrigeration capacity and refrigeration capacity are reduced accordingly.Especially in an evaporator equipped with a meandering refrigerant pipe, it is not possible to narrow the spacing (pitch) of the refrigerant passages. There was a problem with low cooling efficiency.

OBJECT OF THE INVENTION The object of the present invention is to solve the above problems, to be able to cool the freezer compartment of a refrigerator/freezer and the refrigerator with one evaporator, and thus to be very compact and require less installation space. As a result, freezing capacity and refrigeration capacity can be increased accordingly.
In addition, since there are very few joints and a small number of parts, manufacturing is very easy and inexpensive, and there is very little risk of refrigerant leakage, and furthermore, the pitch of the refrigerant passage can be made narrower. The purpose of the present invention is to provide an evaporator for freezers and refrigerators that can improve cooling performance.

Composition of the Invention In order to achieve the above object, the present invention is made of an extruded material comprising an upper horizontal part disposed in the freezing compartment, a lower horizontal part disposed in the refrigerating compartment, and a vertical part connecting the two. The evaporator body has an upper horizontal part and a lower horizontal part with refrigerant passages that open on both left and right sides, and the ends of the adjacent refrigerant passages on both the left and right sides of the evaporator body are connected to the left and right sides of the evaporator body. The gist is an evaporator for freezers and refrigerators in which a meandering refrigerant passage is formed as a whole by sequentially connecting the left and right sides of the evaporator.

Embodiments Examples of the present invention will be described below based on the drawings.

In this specification, front and back and left and right are based on Figure 1, where the front refers to the right side of Figure 1, the rear refers to the left side of Figure 1, the left refers to the front side of the drawing sheet, and the right refers to the back side of the same figure. shall mean.

In FIGS. 1 to 3 showing a first embodiment of the present invention, an evaporator 4 according to the present invention includes an upper horizontal portion 6 disposed in a freezer compartment 2 of a freezer/refrigerator 1;
The evaporator body 5 is made of an extruded aluminum material and has a substantially U-shaped cross section and is composed of a lower horizontal part 7 disposed in the refrigerator compartment 3 and a vertical part 8 connecting the two. Refrigerant passages 9a are provided in the lower horizontal portion 7 and are open on both left and right sides, and the ends of the adjacent refrigerant passages 9a on both left and right sides are sequentially communicated with each other alternately on the left and right sides of the evaporator body 5. As a result, a meandering refrigerant passage 9 is formed as a whole.

As shown in FIG. 1, the evaporator 4 is fitted over a heat insulating partition wall 10 between the freezer compartment 2 and the refrigerator compartment 3, and is attached to the upper surface of the evaporator 4 on the freezer compartment 2 side. A synthetic resin cover 11 is placed over the evaporator 4, and a dew receiving plate 12 is placed below the evaporator 4. Eight refrigerant passages 9a are provided in the upper horizontal part 6 on the side of the freezer compartment 2, while six refrigerant passages 9a, which is less than this, are provided in the lower horizontal part 7 on the side of the refrigerator compartment 3.

As shown in FIGS. 2 and 3, oval plate fitting recesses 13 are provided on both left and right sides of the evaporator body 5 so that the front and back positions are shifted from each other, and each plate fitting recess 13 are two refrigerant passages 9a
The ends of are connected. Each plate fitting recess 13
A refrigerant passage 9 adjacent to the evaporator body 5 on the inside of the evaporator body 5
A communication groove 14 is bored to connect the ends of each plate, and a cover plate 15 made of an aluminum brazing sheet with a brazing metal layer on the inner surface is fitted into each plate fitting recess 13. By brazing the inner surface of the peripheral edge of the cover plate 15 to the bottom peripheral edge of the recess 13,
A meandering refrigerant passage 9 is formed in the evaporator 4 as a whole. and the upper horizontal part 6 of the evaporator body 5
A refrigerant inlet pipe 16 is connected to the rear end of the left side of the lower horizontal portion 7 , and a refrigerant discharge pipe 17 is connected to the rear end of the left side of the lower horizontal portion 7 so as to be connected to both ends of the refrigerant passage 9 .

The plate-fitting recess 13 and the cover plate 15 shown in the drawings have an oval shape, that is, a so-called oval shape when viewed from the side, but they may have other shapes such as a rectangle or a square.
Each plate 15 may be made of aluminum plate and may be joined by welding. Further, approximately U-shaped aluminum side plates having a length approximately equal to the full length of these sides may be fixed to both the left and right sides of the evaporator body 5 by brazing. Furthermore, the ends of adjacent refrigerant passages 9a may be connected by a U-shaped bend pipe. Further, although the refrigerant passage 9a has a circular cross section, it may have other shapes such as an ellipse, a rectangle, or a square.

4 and 5 show a second embodiment of the invention. Here, the difference from the first embodiment is that the communication groove 14 is not provided in the plate fitting recess 13 on both left and right side surfaces of the evaporator body 5, and the refrigerant passage 9a adjacent to the cover plate 15 is not provided. The point is that a recess 18 is provided for communicating the ends of the . And in this case,
The cover plate 1 is inserted into the plate fitting recess 13.
The peripheral edge of each cover plate 5 is fitted, and the inner surface of the peripheral edge of each cover plate is brazed to the bottom peripheral edge of the recess 13, thereby forming a meandering refrigerant passage 9 in the evaporator 4 as a whole. Furthermore, the synthetic resin cover 11 and the dew receiving plate 12 are not arranged on the upper and lower sides of the evaporator 4, and the upper surface of the upper horizontal portion 6 and the lower surface of the lower horizontal portion 7 of the evaporator main body 5 are respectively It is exposed inside the freezer compartment 2 and refrigerator compartment 3.

The other points of this second embodiment are the same as those of the first embodiment, and the same parts are given the same reference numerals in the drawings.

FIG. 6 shows a third embodiment of the present invention, in which a number of tongue-like fins 20 are cut and raised in parallel on the lower surface of the lower horizontal portion 7 of the evaporator body 5. In this case, after the tongue-like fins 20 are cut and raised, the plates 15 are fitted into the plate-fitting recesses 13 on both left and right sides of the evaporator body 5 and joined by welding.

FIG. 7 shows a fourth embodiment of the present invention, in which a number of band-like fins 21 are provided in parallel in the length direction of the evaporator body 5 on the lower surface of the lower horizontal portion 7 of the evaporator body 5. There is. These fins 21 are integrally formed during extrusion molding of the evaporator body 5.

FIG. 8 shows a fifth embodiment of the present invention, in which corrugated fins 22 are provided on the lower surface of the lower horizontal portion 7 of the evaporator body 5 when viewed from the side. In this case, both the plate 15 and the corrugated fins 22 are made of aluminum brazing sheets, and these are attached to the evaporator body 5.
After combining them, they can be joined together by vacuum brazing. In this fifth embodiment, eight refrigerant passages 9a are provided in the upper horizontal part 6 on the side of the freezer compartment 2, while four refrigerant passages 9a are provided in the lower horizontal part 7 on the side of the refrigerator compartment 3. It is provided.

In the evaporator 4 of the third to fifth embodiments,
Since the fins 20 to 22 are provided on the lower surface of the lower horizontal portion 7, the cooling efficiency in the refrigerator compartment 3 is particularly excellent.

Note that the illustrated evaporator 4 has a substantially U-shape when viewed from the side, but the evaporator 4 is not limited to this, and the vertical portion 8 of the evaporator 4 is located in the middle of the widths of both the upper and lower horizontal portions 6 and 7. It may be roughly shaped when viewed from the side. Furthermore, the pitch of the refrigerant passages 9a can be changed as appropriate depending on the use of the freezer/refrigerator 1, and when fins are attached to the evaporator 4, the pitch can be changed freely. Further, the shape of the fins is not limited to that shown in the drawings, and may have other appropriate shapes.

Effects of the Invention As described above, the evaporator for a freezer/refrigerator according to the present invention has an upper horizontal portion 6 disposed in the freezer compartment 2.
The evaporator body 5 is made of an extruded material and includes a lower horizontal part 7 disposed in the refrigerator compartment 3 and a vertical part 8 connecting the two. Refrigerant passage 9 opened on both left and right sides.
A is provided, and the left and right end portions of the adjacent refrigerant passages 9a are successively communicated with each other alternately on the left and right sides of the evaporator body 5, thereby forming a meandering refrigerant passage 9 as a whole. The freezer/refrigerator 1's freezer compartment 2 and refrigerator 3 can be cooled by a single evaporator 4, making it very compact and requiring less installation space, which increases the refrigeration capacity. and refrigeration capacity can be increased. Further, since the number of joints is very small and the number of parts is also small, the evaporator 4 can be manufactured very easily and inexpensively, and there is very little risk of refrigerant leakage. Furthermore, the pitch of the refrigerant passages 9a can be narrowed, resulting in the effect that cooling performance can be improved.

[Brief explanation of drawings]

The drawings show five embodiments of the invention.
Fig. 1 is a partial sectional view of the freezing/refrigerating room showing the usage state of the first embodiment, Fig. 2 is an enlarged perspective view of the evaporator of the first embodiment, and Fig. 3 is taken along the line shown in Fig. 2. An enlarged cross-sectional view, FIG. 4 is a partial cross-sectional view of the freezer/refrigerator showing the usage state of the second embodiment, and FIG.
6 is an enlarged perspective view of the evaporator of the third embodiment, FIG. 7 is an enlarged perspective view of the evaporator of the fourth embodiment, and FIG. 8 is an enlarged perspective view of the evaporator of the fifth embodiment. FIG. 1... Freezer/refrigerator, 2... Freezer compartment, 3... Refrigerator compartment, 4... Evaporator, 5... Evaporator body, 6...
Upper horizontal part, 7... Lower horizontal part, 8... Vertical part,
9, 9a...refrigerant passage, 10...insulating partition wall, 1
4... Communication hole, 15... Plate, 20... Tongue-like fin, 21... Band-like fin, 22... Corrugated fin.

Claims (1)

[Claims] 1 The evaporator body 5 is made of extruded material and includes an upper horizontal part 6 disposed in the freezing compartment 2, a lower horizontal part 7 disposed in the refrigerator compartment 3, and a vertical part 8 connecting the two. Refrigerant passages 9a are provided in the upper horizontal part 6 and lower horizontal part 7 of the evaporator body 5, and the left and right ends of the adjacent refrigerant passages 9a are connected to the left and right sides of the evaporator body 5. An evaporator for a freezer/refrigerator in which a meandering refrigerant passage 9 is formed as a whole by being communicated alternately and sequentially.