JPS6226850B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a heat exchanger that can improve the heat exchange efficiency of fins.

Conventionally, in heat exchangers with large fin spacing, such as heat exchangers for refrigerators, the heat exchanger is often assembled by inserting a jig that defines the fin spacing between each fin. Therefore, it is conceivable to cut and raise protrusions on the fins in order to obtain a turbulent flow effect or a boundary layer effect to improve the heat exchange performance of the fins, but the protrusions get in the way when inserting the jig. Therefore, it is impossible to provide a protrusion, so it is impossible to improve the heat exchange efficiency.

The present invention has been made in order to eliminate such conventional drawbacks, and provides a method for forming a heat exchanger in which the fins are provided with cut-and-raised protrusions, which have been impossible in the past, to improve heat exchange efficiency. is intended to provide.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the heat exchanger main body is designated as a whole by the reference numeral 1, and is composed of a meandering refrigerant pipe 2 and a plurality of fins 3 cross-coupled to the pipe 2. Reference numeral 4 denotes a section formed on each fin 3, and each section 4 is formed so that it can be bent and protruded in a direction perpendicular to the fin 3, that is, a direction crossing the flow direction of the heat transfer fluid. becomes the protrusion 4 as it is.

Next, the method for forming the heat exchanger of the present invention is shown in FIGS.
This will be explained with reference to FIG. First, as shown in FIGS. 4 and 5, a plurality of fins 3 are inserted into the slits 5a of the fin arrangement jig 5 and held at constant intervals. As shown in FIGS. 2 and 3, the section is in the same plane as the fin 3 and is not cut and raised. Next, the refrigerant pipe 2 is assembled into the holding slit 6 for the refrigerant pipe 2 provided in each fin 3, and this pipe is inserted into the pipe press-fitting jig 7.
It is deeply fitted into the slit 6 and fixedly connected to each fin 3. After the refrigerant pipe 2 and the fins 3 are connected, the jig 5 is removed. Thereafter, as shown in FIG. 6, when the cutting and raising jig 8 is press-fitted in the direction of arrow C from the outermost fin 3 toward the sections of each row, the sections of each fin 3 located on the same straight line are It is cut and raised all at once to form the protrusion 4. Thereafter, the jig 8 can be pulled out in the direction of arrow B, or passed through in the press-fitting direction and pulled out.

As described above, according to the method for forming a heat exchanger of the present invention, after removing the jig for bonding the refrigerant pipes and the fins, the jig for cutting and raising the fins from the outermost fin toward the section of each row of fins. By press-fitting the fins, a large number of protrusions can be cut and raised at once, and as a result, the work of cutting and raising the protrusions on the fins becomes extremely easy, and the productivity of the heat exchanger can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a heat exchanger formed according to the present invention, FIG. 2 is a front view of the fins before cutting out the protruding parts, and FIG. 3 is a view of the fins taken along the - line in FIG. 4 is a sectional view seen from the front showing the state of connection between the refrigerant pipe and the fin, FIG. 5 is a sectional view taken along the - line in FIG. 4, and FIG. 6 is a state in which the protrusion is cut and raised from the fin. FIG. 1... Heat exchanger body, 2... Refrigerant piping, 3...
Fin, 4...Protrusion, 5...Jig for fin arrangement, 6...Holding slit, 7...Jig and tool for press-fitting piping, 8...Jig and tool for cutting and raising. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A method for forming a heat exchanger having a plurality of fins that are cross-coupled with refrigerant piping, and in which the intervals between the fins are defined by a jig inserted between the fins, and the fins and the refrigerant piping are bonded and fixed. In order to provide a protrusion in a direction intersecting the flow direction of the heat transfer fluid on the side of each fin, cut and raise sections are formed in advance on each of the fins, and a jig and tool inserted between the fins is removed. A method for forming a heat exchanger, characterized in that a cutting and raising jig is then press-fitted from the outermost fin toward the section of the fin for each row to cut and raise a large number of the protrusions at once.