JPH0114367Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connecting device for an evaporator and an accumulator.

Generally, in the refrigeration cycle of a refrigerator, as shown in FIG. The fuel is stored in the accumulator 2 without directly entering the compressor (not shown). In addition, an inner pipe was inserted inside the accumulator 2, and by introducing the refrigerant into the upper end of the inside of the accumulator 2 through this inner pipe, the generation of noise due to the injection of refrigerant gas was prevented. . In addition, in FIG. 1, reference numeral 4 indicates a large number of plates and fins attached perpendicularly to the straight portion of the meandering refrigerant flow pipe 3;
6 is a pair of side plates arranged on both sides of the plate fins 4, and 6 is a meandering heating tube for defrosting, which is attached to both side edges of the parallel plate fins 4.

Conventionally, in order to connect the above-mentioned evaporator 1 and accumulator 2, for example, as shown in FIG. The portion 23 is caulked to connect the opening peripheral portion 23 and the inner pipe 2.
2 are brought into close contact with each other, and in this state, the opening peripheral portion 23 and the inner pipe 22 are joined by welding, and further the inner pipe 2
At the lower end 22a of 2, an outward convex portion 25 is located in the middle of the length.
A stainless steel backing sleeve 24 having a
The tip 3a of the refrigerant flow pipe 3 on the evaporator 1 side is fitted over the lower end of the outer convex portion 25 of the sleeve 24, and the refrigerant flow is connected to the lower end 22a of the inner pipe 22. Tip 3 of tube 3
a and were interconnected by welding.

However, in such a conventional device, the steps of caulking and welding the lower end opening peripheral portion 23 of the accumulator main body 21 to the inner pipe 22;
It is necessary to perform a process of welding the lower end 22a of the inner pipe 22 and the tip 3a of the refrigerant flow pipe 3, and therefore the evaporator 1 and the accumulator 2
The problem was that the connection work was very troublesome and the cost was high.

This invention was made to eliminate the drawbacks of the above-mentioned prior art, and its configuration will be explained below based on the embodiments shown in the drawings.

2 and 3, the evaporator and accumulator coupling device according to this invention has a stainless steel inner pipe 12 inserted into an aluminum accumulator main body 11, and a ring-shaped part near the lower end of the inner pipe 12. An outer convex portion 14 is provided, and the outer convex portion 14 is attached to the accumulator main body 1.
1, and the tip 3a of the refrigerant flow pipe 3 on the evaporator side is fitted over the end 12a of the inner pipe 12 below the outer convex portion 14, and the refrigerant flow pipe 3 and the lower end opening periphery 13 of the accumulator main body 11 are connected to each other by welding. The upper opening of the accumulator main body 11 is connected to a compressor (not shown).

In the above embodiment, the outer convex portion 14 of the inner pipe 12 is formed in an annular shape, but it may be partially protruded. Further, the lower end opening peripheral portion 13 of the accumulator main body 11 and the tip portion 3a of the refrigerant flow pipe 3 are connected by a welding wire 15 with a slight distance between them via the annular outward convex portion 14 of the inner pipe 12. In some cases, the two are directly abutted and joined by welding. In this case, small tapered recesses (not shown) capable of housing the outward convex portions 14 may be provided on the inner peripheral edges of the peripheral edge portion 13 and the tip portion 3a, respectively. Further, in the embodiment, the accumulator main body 11 is connected to the tip 3a of the meandering refrigerant flow pipe 3 of the evaporator 1, but if the evaporator 1 is made by other roll bonding methods, ,
The accumulator main body 11 is similarly connected to the tip of the connecting pipe connected to the refrigerant passage.

As described above, the evaporator and accumulator coupling device according to this invention is constructed such that the inner pipe 12 is made of stainless steel and is inserted in a state that protrudes downward from the lower end opening of the accumulator main body 11. Main body 11
The lower end opening periphery 13 and the tip 3 of the refrigerant flow pipe 3
When connecting the inner pipe 12 with the inner pipe 12 by welding, the lower end 12a of the inner pipe 12 serves as a backing, and molten aluminum does not enter the inside of the accumulator body 11 and the refrigerant flow pipe 3. In addition, since the backing sleeve 24 unlike the conventional one is not used, the number of parts can be reduced, and work such as caulking the aluminum inner pipe 22 is not required, and there is only one welding point. The welding work is reduced to half compared to the conventional case where welding is required at two locations, and the effect is that the work of connecting the evaporator 1 and the accumulator 2 can be performed extremely easily and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view of an evaporator equipped with an accumulator, Fig. 2 shows an embodiment of this invention, and Fig. 3 is an enlarged partially cutaway side view of the connecting part between the accumulator and refrigerant flow pipe. FIG. 4 is an enlarged sectional view of the same portion showing a conventional example. 1... Evaporator, 2... Accumulator, 3...
Refrigerant flow pipe, 3a... tip, 11... accumulator body, 12... inner pipe, 12a
...Lower end, 13... Lower end opening periphery, 14...
External convexity.

Claims (1)

[Scope of utility model registration request] A stainless steel inner pipe 12 is inserted into the aluminum accumulator body 11,
An outer convex portion 14 is provided at a portion near the lower end of the inner pipe 12, and the outer convex portion 14 is engaged with the lower end opening peripheral portion 13 of the accumulator main body 11, and is disposed at the tip of the refrigerant flow pipe 3 on the evaporator 1 side. The portion 3a is fitted over the end portion 12a of the inner pipe 12 below the outer convex portion 14, and the tip portion 3a of the refrigerant flow pipe 3 and the lower end opening peripheral portion 13 of the accumulator body 11 are connected to each other. Connection device for evaporator and accumulator.