JPH0410541Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a cooler used in refrigerators, which blows cold air into the refrigerator using forced air, which is generally referred to as an intercooling type. The present invention provides a cooler suitable for rapid freezing in a type of refrigerator that cools things.

(Prior art and its problems) In this type of conventional cooler, as shown in FIG.
As shown in Figure 5 (Japanese Unexamined Patent Publication No. 60-26270), a structure in which a flat plate 102 and a fin 104 are attached to a heat pipe 100, and a sheet formed by roll bonding 108 as shown in Figure 6. A structure in which a section and a path section are integrated (Japanese Patent Application Laid-Open No. 60-26269) is known.

However, in the case of FIGS. 4 and 5, the heat pipe 100, the fins 104 and the flat plate 102
Since it is a separate body, it not only has a large number of parts, which poses problems in terms of productivity, but also has heat transfer resistance (bond conductance), resulting in poor heat transfer efficiency.

In addition, in the one-piece structure using roll bonding shown in Figure 6, since two thin aluminum plates are crimped together, there is a limit to the expansion tube in the pass section (pass height cannot be increased), and the cross-sectional area is small. In addition to being small, there is a problem that the path becomes flat and the cross-sectional area tends to be reduced at the bent portion, and as a result of the limited internal volume of the path, there is a problem that the critical amount of heat transport is small.

(Purpose of the invention) The object of the invention is to provide a cooler for a refrigerator that has a reduced heat transfer resistance, a large critical heat transport amount, and is excellent in productivity.

(Structure of the invention) (1) Technical means The invention provides a heat transfer plate consisting of a flat plate part on which the object to be cooled is placed, and an absorbing part continuously bent at a substantially right angle to the flat plate part. Along the back of the hot plate,
A heat pipe for storing heat medium is provided that is tightly fixed across the flat plate part and the absorbing part, the part of the heat pipe that comes into close contact with the flat part is curved, and the part of the heat pipe that comes into close contact with the absorbing part is formed into a curved shape. , a cooling air outlet and cooling fins formed by cutting and raising a part of the absorbing portion are formed in the absorbing portion provided with the heat pipe; This refrigerator cooler is characterized in that a back plate is fixed to a flat plate part to cover the curved part of the heat pipe that comes into close contact with the heat pipe from the back side.

(2) Effect Since the flat plate portion and the absorption portion of the heat transfer plate are in the form of one continuous plate, no heat transfer resistance occurs between them, and the heat transfer capacity is large.

Furthermore, since the cooling air outlet of the absorption section is surrounded by a substantially frame-shaped heat pipe, the strength of the absorption section is improved.

(Example) In FIG. 1, which is a plan view of a refrigerator cooler employing the present invention, 10 is a heat transfer plate made of a painted aluminum thin plate. On the back surface of the heat exchanger plate 10, a heat pipe 12 made of an aluminum pipe is fixed to the heat exchanger plate 10 by, for example, adhesive. heat pipe 1
A predetermined amount of a heat medium such as, for example, Freon R12 is sealed inside the container 2 . These heat exchanger plates 10,
The heat pipe 12 and the like constitute a refrigerator cooler.

The heat transfer plate 10 is a continuous plate having a flat plate part 14 and an absorbing part 16, and the object to be cooled 18 (see FIG. ).
A rib 14a is provided at the lower edge of the flat plate portion 14 in FIG.
Engagement portions 14b for positioning are formed on each side edge by press working. Further, the absorbent portion 16 is bent upward at a substantially right angle to the flat plate portion 14 .

The heat pipe 12 consists of a curved part 12a that is in close contact with the flat plate part 14 of the heat exchanger plate 10, and a condensing part 12b that is in close contact with the absorbing part 16.
It is sealed with 0. Welding section 20 of condensation section 12b
is located slightly away from the absorbing portion 16 to allow the swelling of the weld bead to escape. 22 is a pipe for injecting a heat medium.

In the center of the absorbent section 16, cooling air vents 24 and fins 26 (FIG. 1), which are formed by cutting and raising the absorbent section 16, are formed at, for example, 14 locations. A cooling air outlet 24 is provided at the outer peripheral edge of the absorbing portion 16.
A condensing section 12b is formed in a substantially frame shape so as to surround the fins 26, and the condensing section 12b reinforces the absorbing section 16, whose strength decreases at the cooling air outlet 24.

As shown in FIGS. 1a, 1b, and 3, a back plate 30 that covers the curved part 12a from the back side is fixed to the part of the flat plate part 14 to which the curved part 12a is bonded, for example by welding. There is.

Next, the effect will be explained. The amount of heat from the object to be cooled 18 pressed onto the flat plate part 14 is transmitted to the curved part 12a through the flat plate part 14, and evaporates the heat medium in the curved part 12a. The evaporated heat medium is in the curved part 1
It flows from 2a to the condensing part 12b, is cooled and condensed in the condensing part 12b, and returns to the curved part 12a again. At this time, the amount of heat transmitted from the condensing part 12b to the flat plate part 14 is transmitted through the cooling air outlet 24 along arrow A in FIG. 1a.
Heat is efficiently radiated from the fins 26 by the cooling air passing through the fins 26.

The outer peripheral edge of the absorbing portion 16 where the cooling air outlet 24 is open is surrounded by the condensing portion 12b as shown in FIG. The strength of the absorption part 16 does not decrease.
strength is maintained.

Further, since the flat plate portion 14 through which the amount of heat from the object to be cooled 18 is transmitted is continuous with the absorption portion 16, a portion of the amount of heat from the object to be cooled 18 is directly transferred to the absorption portion 16, and the heat is radiated from the fins 26. Ru.

Further, the flat plate portion 14 is provided with a back plate 30, which has a large heat transfer capacity from the curved portion 12a.

(Effects of the invention) As explained above, in the refrigerator cooler according to the invention, the outer peripheral edge of the absorption part 16 where the cooling air outlet 24 is opened is located at the condensing part 1 as shown in FIG.
2b, the absorption part 16 is surrounded by the condensation part 1
2b, the strength of the absorbent portion 16 does not decrease even if the cooling air outlet 24 is open, and the strength of the absorbent portion 16 can be improved.

Further, since the flat plate portion 14 of the heat transfer plate 10 through which the amount of heat from the object to be cooled 18 is transmitted is continuous with the absorption portion 16, a portion of the amount of heat from the object to be cooled 18 is directly transferred to the absorption portion 16. Heat is radiated from the fins 26 with high efficiency, and the heat is carried only from the heat pipe 12.
The heat transfer efficiency is improved compared to the conventional example shown in FIGS.

Further, the flat plate portion 14 is provided with a back plate 30, which increases the heat capacity of the flat plate portion 14 transmitted from the curved portion 12a, further improving heat transfer efficiency.

(Another embodiment) (1) The condensing part 12b is not limited to the case where it is formed in a continuous substantially frame shape with the welded part 20 as shown in FIG. 32,3
4 may be crossed, or one end 32 (double-dashed line) may be arranged between the rows of cooling air holes 24.

(2) The absorbent portion 16 is not limited to being curved upward substantially perpendicularly to the flat plate portion 14, but may be curved downward.

(3) FIG. 7 is a perspective view showing a modification of FIG.
is exposed as shown in FIG. 7a, and the back plate 30 is not provided as shown in FIG.

(4) FIG. 8 shows a modification in which the path direction of the curved portion 12a is transverse. In this case, the flat plate portion 14
The levelness of the horizon is not so strictly required;
If the flat plate portion 14 is tilted forward by about 3 degrees in FIG. 8, the condensed heat medium in the heat pipe 12 will flow back to the curved portion 12a, improving heat transfer efficiency.

In addition, as shown in FIG. 9, the heat pipe 12
The condensing part 12b is connected to the end part 32, as in FIG.
34 may be crossed.

(5) Finally, in Figure 10, each independent abbreviation U
This is a modified example in which the letter-shaped heat pipes 12x, 12y, and 12z are individually fixed to the flat plate part 14, and the heat pipes 12x to 12z have few vent parts, and the flow resistance of the heat medium is small. Note that when there is a local heat load on the flat plate part 14, the heat transfer efficiency is better in FIGS. 8 and 9, but even in the case of FIG. It has sufficient heat transfer efficiency when there is a heat load.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a refrigerator cooler adopting the present invention, Fig. 1a is a sectional view taken along line a-a in Fig. 1, and Fig. 1b is
The figure is a cross-sectional view taken along line bb in Fig. 1, Fig. 2 is a view taken in the direction of the arrow in Fig. 1, and Fig. 2a is a structural schematic diagram showing another embodiment.
FIG. 3 is a view in the direction of the arrow in FIG. 1, FIGS. 4, 5, and 6 are perspective views showing conventional examples, and FIGS. 7 to 10 are perspective views showing still other embodiments. ,
FIG. 7a is a sectional view taken along line a-a in FIG. DESCRIPTION OF SYMBOLS 10... Heat exchanger plate, 12... Heat pipe, curved part, 12a... Curved part, 12... Condensation part, 14...
... Flat plate part, 16 ... Absorption part, 24 ... Cooling air outlet, 26 ... Fin.

Claims (1)

[Scope of utility model registration request] A heat exchanger plate consisting of a flat plate part on which the object to be cooled is placed and an absorbing part bent at a substantially right angle in continuation with this flat plate part is provided, and a heat transfer plate is provided along the back surface of the heat exchanger plate across the flat plate part and the absorbing part. A heat pipe for storing a heat medium is fixed in close contact with the heat pipe, and the part of the heat pipe that comes into close contact with the flat plate part is formed into a curved shape, and the part of the heat pipe that comes into close contact with the absorption part is formed into a roughly curved shape along the absorption part. A cooling air outlet and cooling fins are formed by cutting and raising a part of the absorbent part on the absorbing part formed in a frame shape and provided with the heat pipe, and the heat pipe is curved so as to be in close contact with the flat plate part. A refrigerator cooler characterized in that a back plate that covers the part from the back side is fixed to a flat plate part.