JPS61143695A - Cooler - Google Patents

Abstract

PURPOSE:To obtain a superior cooler in the structure, wherein the cooling efficiency thereof is good, and moreover, the frost of the cooler can be also defrosted efficiently by a glass tube heater and so forth, by a method wherein fins larger than other fins are provided on the pipe at every a certain number of sheets in each stage and the larger fins are respectively brought into contact to the pipe or the fins in the adjacent stage thereof. CONSTITUTION:The longitudinal dimension Y2 of each second fin 13 for heat conduction is formed larger than that Y1 of each first fin 12 for heat conduction. Whereby the second fins 13 are made larger than the first fins 12. Then, the fins 12 and 13 are attached on a pipe 11 in a linear state leaving bending parts 11a in such a way that the second fin 13 is located between the first fins 12 at every one sheet, for example, among the bending parts 11a (equivalent to each stage in a state that the pipe 11 is being meanderingly bent). In that state, after the pipe 11 is made in such a state that the diameter thereof is expanded and the pipe 11 is securely brought into contact to the fins 12 and 13, the pipe 11 is bent from the foregoing bending parts 11a and is bent in such a way as to form a meandering form as a whole. By this way, the second fins 13 are respectively brought into contact to the pipe 11 in the adjacent stage thereof.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention comprises a finned serpentine pipe,
This invention relates to a so-called independent fin type cooler.

[Technical background of the invention and its problems] Conventionally, coolers used in refrigeration cycles, for example, have a multi-stage meandering bent refrigerant passage as shown in Figure 5. Some pipes 1 are provided with heat transfer fins 2 and 3 that extend over all or some of the stages. However, in this case, the fins 2.3 are attached one by one to the pipe 1 after it has been meander-formed, so it has the problem of being time-consuming and expensive to manufacture. In addition, regarding the air circulation shown by arrow A in the figure, there is a problem that the air flow is fixed between each fin and there is no exchange with the air passing between other fins, resulting in poor cooling efficiency. Ta.

On the other hand, as shown in FIG. 6, the fins 5 are attached in a straight state to the pipe 4 through which the refrigerant passes, similar to the pipe 1, and then the pipe 4 is bent into a meandering shape, so that each stage is There is a so-called independent fin type cooler which has independent fins 5 and then has a common end plate 6 attached to each stage. According to this product, it can be manufactured quickly and therefore costs can be reduced.
Moreover, with regard to air circulation, sufficient exchange can be made throughout the entire structure and cooling efficiency can be improved. There was a problem in that it took a long time to finish defrosting because the heat could only be distributed by convection and no conduction through the fins 5 could be expected.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and therefore, its purpose is to provide a system that is inexpensive, has good cooling efficiency, and also efficiently defrosts using a glass tube heater, etc. Provide a cooled cooler.

Summary of the Invention] The present invention relates to a so-called independent fin type cooler constructed by attaching heat transfer fins to a J-vibe through which a refrigerant passes and bending the pipe in a meandering manner in multiple stages. By providing the fins at intervals of the same number in each stage, and making the individual fins contact the pipes or fins of the adjacent stage, productivity and cooling efficiency can be improved. It is characterized in that it not only provides high heat resistance but also improves heat transferability.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. First of all, in Figure 1, 11 is a pipe through which the refrigerant passes, and although it is shown bent in a meandering manner in the figure, it is initially straight as shown in Figure 2. .

12 is a first fin for heat transfer, and 13 is a second fin for heat transfer, and as shown in FIGS. 3 and 4, these fins have the same horizontal dimension of X, respectively. The vertical dimension Y2 of the second fin 13 is larger than that Y1 of the first fin 12, thereby making the second fin 13 larger than the first fin 12. As shown in FIG. 2, the two fins 12 and 13 are attached to the pipe 11 in the straight state, as shown in FIG. The second fins 13 are installed so that, for example, every other fin 12 is located in the first fin 12, and a press-fitting frame is inserted into the pipe 11 in the state shown in A), or a press-fitting fluid is put in the pipe 11. pipe 11
After expanding the diameter of the pipes 12 and 13 to ensure contact with the fins 12 and 13, the pipe 11 is bent from the bent portion 11a so as to form a serpentine shape as a whole, thereby forming the second fins 13 respectively. It is brought into contact with the pipe 11 of the next stage. In addition, the second fin 13 has four contact parts 15 in addition to the hole 14, which can be inserted into the pipe 11 by fitting them into the adjacent pipes 11.
1, so as to allow contact over a larger area. Further, numeral 16 in FIG. 1 is an end plate, which is attached to the bent pipe 11, and necessary parts such as an accumulator 17 are attached to the pipe 11.

In the case of the structure as described above, since the whole structure has a so-called independent fin shape, it can be easily manufactured and provided at low cost. This has the effect of allowing sufficient exchange to occur and cooling efficiently. When defrosting,
The heat from the glass tube heater 7 etc. is transmitted by convection, and at the same time,
It is also transmitted by conduction through the fins, especially the second fins 13, which are each formed larger than the first fins 12 and contact the pipe 11 of the adjacent stage, and from this, defrosting can be carried out efficiently. Defrosting can be completed quickly.

Note that the second fins 13 may be configured to contact the first fins 12 or the second fins 13 instead of the pipes 11 in the adjacent stage.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and in particular, the specific number of meandering stages of the pipe 11 or the specific number of used first and second fins 12 and 13, respectively. In addition, the specific number of fins 12, 13 and the like may be modified as appropriate without departing from the scope of the invention.

[Effects of the Invention] As is clear from the above description, the present invention achieves the excellent effects of being inexpensive, having high cooling efficiency, and being able to defrost efficiently using a glass tube heater or the like. It is something to do.

[Brief explanation of drawings]

1 to 4 show one embodiment of the present invention, FIG. 1 is an overall front view, FIG. 2 is an approximately overall front view with a part of the manufacturing process omitted, and FIG. Enlarged side view of the fin, No. 4
The figure is an enlarged side view of the second fin, and FIGS. 5 and 6 are views corresponding to FIG. 1 of the conventional structure, respectively. In the figure, 11 is a pipe, 12 is a first fin, and 13 is a second fin. Applicant Toshiba Corporation WA1 Figure 2

Claims (1)

[Claims] 1. It is constructed by attaching heat transfer fins to a pipe through which the refrigerant passes, and bending the pipe into a meandering shape in multiple stages, with a fin larger than the other fins in each stage. A cooler characterized in that the large fins are provided at intervals of a certain number and are in contact with the pipes or fins of the adjacent stage.