JPH10132396A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device exhibiting a superior heat exchanging characteristic even between pipe passages in which refrigerant is contacted for a relative long period of time in a freezing circuit as found in a refrigerator or the like. SOLUTION: A capillary tube 4 in a freezer circuit of a refrigerator or the like and a circulating copper pipe 6 for a compressor are wound in a helical manner with a copper foil tape 10 with adhesive agent being coated at one surface, the capillary tube 4 and the outer circumferential surface of the circulating copper pipe 6 are in close contact with each other and at the same time the end side edge portions of the copper foil tape 10 are overlapped with each other to enclose the capillary tube 4 and the circulating copper pipe 6 and further the copper foil tape 10 is properly deformed in such a way that it may be extended along the capillary tube 4 and the outer circumferential surface of the circulating copper pipe 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanging device between pipe lines which are in relatively long contact, such as a refrigeration circuit in a refrigerator or the like.

[0002]

2. Description of the Related Art Refrigeration circuits in refrigerators, freezers, and the like include:
As shown in FIG. 1, the refrigerant compressed by the compressor 1 flows as indicated by an arrow, condenses in the condenser 2, is sent to the cooler 5 through the dryer 3 and the capillary tube 4, and is cooled. After performing an endothermic action at 5, the refrigerant is circulated to the compressor 1 through a copper tube 6 arranged in contact with the capillary tube 4, and the high temperature side of the capillary tube 4 and the low temperature side of the copper tube 6 through which the refrigerant flows in the opposite direction. The heat exchange is performed between the capillary tubes 4 and the copper tubes 6 arranged in parallel by soldering as shown in FIG. In this case, heat conduction between the two is performed. In this case, about 1/4 of the entire outer peripheral surface of the relatively small-diameter capillary tube 4 is used, and about 1/4 of the entire outer peripheral surface of the relatively large-diameter copper tube 6. 6 or less are connected to each other via solder Therefore, it is difficult to increase the heat exchange efficiency thereof, and since the outer peripheral surfaces of both are connected by soldering, the outer peripheral surface of the copper tube 6 is generated by the low-temperature refrigerant flowing inside. The solder may be peeled off due to hydrolysis or corrosion caused by dew condensation water, etc., and if the solder is partially peeled off, the heat exchange efficiency between the capillary tube 4 and the copper tube 6 immediately deteriorates in that part. As a result, there was a problem that the performance of the refrigeration circuit was reduced.

In the piping heat exchange apparatus described in Japanese Utility Model Application Laid-Open No. 58-25961, a capillary tube through which a refrigerant flows and a suction tube are soldered and then covered with a heat-shrinkable tube or made of thermoplastic or thermoplastic resin. Although heat is exchanged between the capillary and the suction pipe by coating with a thermosetting synthetic resin, these heat-shrinkable tubes and thermoplastic or thermosetting synthetic resins themselves have particularly high thermal conductivity. However, it is impossible to increase the heat exchange efficiency by these methods, and has the same disadvantages as the above-mentioned prior art.

Further, in the mounting structure of the thermoswitch temperature sensing portion described in Japanese Utility Model Laid-Open No. 3-124194, the circumference of the refrigerant pipe and the thermoswitch temperature sensing portion which are brought into axial contact with each other is wound with aluminum tape. The refrigerant pipe and thermo switch temperature sensing part are closely attached and fixed, the aluminum tape is surrounded by a heat insulating material, and both ends of the heat insulating material are wound and wrapped by a binding member. It is necessary to tension and wind the aluminum tape in order to tightly fix and fix the refrigerant pipe and thermo switch temperature sensing part by turning, so the contact part between the refrigerant pipe and thermo switch temperature sensing part and aluminum tape is compared. The amount of heat exchange through the aluminum tape is relatively small, and the aluminum tape is simply wrapped around the refrigerant pipe and the thermo switch temperature sensing part in parallel with the axial direction. Therefore, it is very difficult to adhere and fix both pipelines only by winding aluminum tape as described above between pipelines that are relatively in contact with each other or pipelines that are both bent. However, since the essential purpose of conducting heat between the refrigerant pipe and the thermoswitch temperature sensing part is not sufficiently fulfilled, there is a problem that is not suitable for practical use.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat exchanger having good heat exchange characteristics even between relatively long contact lines such as a refrigeration circuit in a refrigerator or the like. is there.

[0006]

Therefore, a heat exchange apparatus according to the present invention wraps a capillary tube arranged in parallel with a refrigeration circuit in a refrigerator or the like and a circulation line to a compressor with a copper foil tape. The capillary tube and the circulation line are brought into close contact with each other.

That is, as a part of a refrigeration circuit in a refrigerator or the like, a capillary tube and a circulation line to a compressor are arranged in parallel, and these are wrapped with a copper foil tape and adhered to each other. Because the direct heat exchange characteristics between the pipes can be maintained well, and at the same time, the copper foil tape can be appropriately deformed by making use of its deformable properties, and can be sufficiently adhered to the capillary tube and the circulation pipe. The heat exchange efficiency between the capillary tube and the circulation line via the copper foil tape can be easily improved according to the increase in the contact area,
Further, even if the capillary tube and the circulation line are relatively long, reliable and good heat exchange between the capillary tube and the circulation line can be easily achieved by wrapping the copper foil tape.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described by assigning the same reference numerals to the same parts as those of the conventional apparatus and the same parts of each embodiment. 1 to 3, a capillary tube 4 of a refrigeration circuit in a refrigerator, a freezer, and the like and a circulating copper tube 6 to the compressor 1 are arranged in parallel so as to be in contact with each other on an outer peripheral surface. The copper foil tape 10 is completely wound around the capillary tube 4 and the copper tube 6 in such a manner that the copper foil tape 10 is spirally wound sequentially so that both side edges of the copper foil tape 10 overlap each other. The outer peripheral surfaces of the copper tubes 6 are in close contact with each other.

As shown in an enlarged cross section in FIG. 4, this copper foil tape 10 has a stable high adhesive strength, for example, an acrylic adhesive 12 on one surface of a strip-shaped rolled hard copper foil 11. When the copper foil tape 10 is strongly wound around the capillary tube 4 and the copper tube 6 while peeling off the release paper 13 as described above, the adhesive 12 Due to the adhesive action, the copper foil tape 10 securely adheres to the outer peripheral surfaces of the capillary tube 4 and the copper tube 6 over the entire length, and the overlapping side edges of the spirally wound copper foil tape 10 also securely adhere to each other. The copper foil tape 10 can be easily deformed by pressing the copper foil tape 10 from the outside,
Since the copper foil tape 10 can be brought into close contact with both outer peripheral surfaces of the capillary tube 4 and the copper tube 6 in the widest possible range, the capillary tube 4 and the copper tube 6 can directly exchange heat with each other through the adhered portion. At the same time, it is possible to conduct heat effectively through the copper foil tape 10 that completely wraps the two, and therefore, the heat exchange characteristics between the capillary tube 4 and the copper tube 6 are excellent, so that the capillary tube 4 and the There is a great advantage that the length of the copper tube 6 can be appropriately reduced.

Further, since the copper foil tape 10 is sequentially wound spirally around the capillary tube 4 and the copper tube 6, no matter how long the capillary tube 4 and the copper tube 6 are, or how both are formed. Even if it is bent, it is always easy to completely wrap the capillary tube 4 and the copper tube 6 with the copper foil tape 10 and bring the outer peripheral surfaces of the capillary tube 4 and the copper tube 6 into close contact with each other. Very convenient.

Further, since the capillary tube 4 and the copper tube 6 are completely wrapped by the copper foil tape 10,
Even if cleaning water or the like intrudes from the outside, the close contact between the capillary tube 4 and the copper tube 6 is not impaired at all, and the capillary tube 4 and the copper tube 6 are formed in a spiral shape of the copper foil tape 10. Since they are in close contact with each other by wrapping and no solder is used to connect them, even if dew condensation occurs on these outer peripheral surfaces, the adhesion between them is not impaired at all. The tube 4 and the copper tube 6 can exhibit stable heat exchange characteristics, and have a feature of high reliability as a heat exchange device.

Furthermore, since the copper foil tape 10 wound around the capillary tube 4 and the copper tube 6 can be relatively easily peeled off as required, the correction at the time of maintenance of the capillary tube 4 and the copper tube 6 is compared. It also has the advantage of being simple.

In the above embodiment, the copper foil tape 10 is spirally wound around the capillary tube 4 and the copper tube 6 in a spiral manner.
The adhesiveness between the capillary tube 4 and the copper tube 6 can be easily increased, and the adhesiveness between the copper foil tapes 10 can be increased by continuous superposition of the edge portions on the copper foil tape 10 side. Even if the adhesive 12 and the release paper 13 in the foil tape 10 are omitted, substantially the same functions and effects as described above can be obtained.

Next, in the embodiment shown in FIGS. 5 and 6, the capillary tube 4 of the refrigeration circuit and the copper pipe 6 circulating to the compressor 1 are arranged in parallel so as to be in contact with each other on the outer peripheral surface.
5, while peeling off the release paper 13 of the copper foil tape 10, the copper foil tape 10 is applied substantially in parallel from the side of the capillary tube 4 having a relatively small diameter as shown by an arrow in FIG. 6 with the adhesive 12 adhered to the outer peripheral surfaces of the capillary tube 4 and the copper tube 6 so that the copper foil tape 10
Are overlapped on the outer peripheral surface of the copper tube 6 having a relatively large diameter, and the copper foil tape 10 is wound around the capillary tube 4 and the copper tube 6 as a result of being adhered to each other also by the adhesive 12 at this portion. Completely wrap with capillary tube 4
In addition, the outer peripheral surfaces of the copper tube 6 are in close contact with each other.

In this case, since both side edges of the copper foil tape 10 are overlapped and adhered on the outer peripheral surface of the copper tube 6, the copper foil tape 10 is easily and strongly wound around the capillary tube 4 and the copper tube 6. Therefore, the outer peripheral surfaces of the capillary tube 4 and the copper tube 6 can be directly and reliably brought into close contact with each other, and good heat exchange characteristics can be ensured by the contact portion between the two.

Further, similarly to the case of the above-described embodiment, the copper foil tape 10 is easily deformed by pressing the copper foil tape 10 from the outside, so that the outer peripheral surfaces of the capillary tube 4 and the copper tube 6 are Since the copper foil tape 10 can be adhered to a wide range as much as possible, heat can be effectively conducted between the capillary tube 4 and the copper tube 6 through the copper foil tape 10 that completely wraps the copper foil tape 4 and the copper tube 6.
Since the heat exchange efficiency between the capillary tube 4 and the copper tube 6 can be easily improved, the capillary tube 4
In addition, there is a great advantage that the length of the copper tube 6 can be appropriately reduced.

Further, by cutting the copper foil tape 10 to an appropriate length in advance, no matter how long the capillary tube 4 and the copper tube 6 are, or how both are bent, As described above, the operation of completely enclosing the capillary tube 4 and the copper tube 6 with the copper foil tape 10 and bringing the outer peripheral surfaces of the capillary tube 4 and the copper tube 6 into close contact with each other is always easy and practically very convenient.

Further, since the capillary tube 4 and the copper tube 6 are completely wrapped by the copper foil tape 10, even if cleaning water or the like intrudes from the outside, the capillary tube 4 and the copper tube 6 are not covered. Since the adhesion is not impaired at all, and the capillary tube 4 and the copper tube 6 are in close contact with each other by winding the copper foil tape 10, no solder is used to connect the two.
Even if dew condensation water is formed on these outer peripheral surfaces, the adhesion between the two is not impaired at all, so that the capillary tube 4 and the copper tube 6 can exhibit stable heat exchange characteristics, and can be used as a heat exchange device. Has a highly reliable feature.

Furthermore, since the copper foil tape 10 wound around the capillary tube 4 and the copper tube 6 can be relatively easily peeled off as needed, the correction at the time of maintenance of the capillary tube 4 and the copper tube 6 is compared. It also has the advantage of being simple.

The copper foil tape in each of the above embodiments is selectively wound around a copper tube and a capillary tube in contact with the copper tube where dew condensation is likely to occur, and the other portions are connected by soldering as in the past. Needless to say, this may be done.

[0021]

In the heat exchanger according to the present invention,
Since the capillary tube and the circulation line to the compressor in a part of the refrigeration circuit are wrapped and adhered to each other with copper foil tape, it is possible to maintain good direct heat exchange characteristics between the capillary tube and the circulation line. at the same time,
By increasing the contact area between the copper foil tape and the capillary tube and the circulation pipe, the heat exchange characteristics between the capillary tube and the circulation pipe via the copper foil tape can be improved, and therefore, the capillary tube and the circulation pipe can be improved. The heat exchange efficiency between roads can be easily improved. Further, unlike the related art, since it is not necessary to connect the capillary tube and the circulation line with solder, there is no possibility that the capillary tube and the circulation line are separated due to dew condensation or the like.
The reliability as a heat exchange device can be reliably improved.

[Brief description of the drawings]

FIG. 1 is a schematic general refrigeration circuit diagram.

FIG. 2 is an explanatory view of a main part in the embodiment of the present invention.

FIG. 3 is an enlarged vertical sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a partially enlarged longitudinal sectional view of the embodiment.

FIG. 5 is an explanatory view of a main part in another embodiment of the present invention.

FIG. 6 is an enlarged vertical cross-sectional view of a main part of another embodiment.

FIG. 7 is an enlarged longitudinal sectional view of a main part of a conventional device.

[Explanation of symbols]

 4 Capillary tube 6 Copper tube 10 Copper foil tape 11 Copper foil 12 Adhesive 13 Release paper

Claims (4)

[Claims] 1. A heat source in which a capillary tube arranged in parallel with a refrigeration circuit in a refrigerator or the like and a circulation line to a compressor are wrapped with a copper foil tape so that the capillary tube and the circulation line are brought into close contact with each other. Exchange equipment. 2. The heat exchanger according to claim 1, wherein the side edges of the copper foil tape are overlapped with each other, and the capillary tube and the circulation line are wrapped with the copper foil tape. 3. The copper foil tape according to claim 1, wherein an adhesive surface is formed on one surface of the copper foil tape, and the capillary tube and the circulating conduit are wrapped around the adhesive surface side of the copper foil tape. Heat exchange equipment. 4. The heat exchange device according to claim 1, wherein the copper foil tape is spirally wound around the capillary tube and the compressor.