JP2001280880A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger improved in heat exchanging performance. SOLUTION: A fin 1 constituting the heat exchanger is provided with slit type cut-and-raised parts 5b in the vertical direction at the central part between collar units 5a-5a, chevron-shaped slit type cut-and-raised parts 5c, 5d, 5e, 5f extended radially to the vertical and horizontal four directions from the peripheral part about the center of the collar units 5a and whose respective tip ends are extended in the vertical directions in parallel to the end surfaces of the fins, and, further, hat-type cut-and-raised parts 5i having upright surfaces 5g, 5h arranged at the upstream side end of air before the collar units 5a with respect to air stream A, which flows between the fins, and whose tip ends are extended in the vertical directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for an air conditioner, and more particularly, to a fin structure of the heat exchanger.

[0002]

2. Description of the Related Art As shown in FIG. 1, for example, a heat exchanger for an air conditioner has a plurality of fins 1 stacked in parallel at a predetermined interval and a plurality of hairpin-shaped heat transfer tubes 2 perpendicular to the fins.
5, and a cylindrical collar portion 5 for inserting and fixing the heat transfer tube 2 to the fin 1 as shown in FIG. 5, for example.
a with a plurality of mounting holes 5 provided at predetermined intervals,
A so-called corrugated fin provided with corrugated protrusions 6 on the leeward and leeward sides of the fin center with respect to the flow of air for heat exchange, and heat exchange as shown in FIG. A so-called slit fin having a plurality of slit-shaped cut-and-raised portions 7 provided at predetermined intervals on the fin surface with respect to the flow of air for use, or a fin surface having a flat surface (not shown) Some were provided with flat fins or louver-like cut-and-raised portions.

[0003]

However, in any of the conventional fins, in front of the collar portion located on the windward side of the airflow flowing between the fins, the airflow is promoted or the turbulent airflow is prevented. In this part, the heat exchange rate is low because there is no element that causes the heat exchange. Therefore, it is an object of the present invention to provide a heat exchanger that solves the above-mentioned problems and improves the heat exchange rate of the entire fin.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and comprises a plurality of collar portions provided with a plurality of collar portions in the vertical direction at the center of the plate surface and stacked in parallel at predetermined intervals. Fins, a plurality of heat transfer tubes fitted into the collar portion so as to be orthogonal to the fins, and a connecting tube connecting the open ends of the heat transfer tubes, and A slit-shaped cut-and-raised portion is provided on the collar portion, and the collar portion is radially extended from its peripheral portion in four directions of left, right, obliquely up and down, and each tip portion extends in the opposite vertical direction in parallel with the end surface of the fin. While providing a slit-shaped cut-and-raised in the shape of a "K" -shaped to be out, the air flow flowing between the fins, at the windward end in front of the collar portion, has a rising surface up and down, respectively Upside down A structure in which a cut and raised the hat made by extending direction.

[0005] Alternatively, a plurality of collars are provided in the vertical direction at the center of the plate surface, a plurality of fins stacked in parallel at a predetermined interval, and a plurality of fins inserted into the collars perpendicular to the fins. A heat transfer tube and a connecting tube connecting the open ends of the heat transfer tube, and a slit-shaped cut-and-raised portion is provided in a central portion between the collar portions of the fins in a longitudinal direction, and from the peripheral portion around the collar portion. A く -shaped slit-like cut-and-raised shape is provided in which the left and right diagonally extend up and down in four directions and the respective tips extend in opposite directions up and down in parallel with the fin end surface. For the airflow flowing between the steps, a stair-shaped cut-and-raised configuration in which a rising surface is provided in the windward end in front of the collar portion in a vertically opposite direction, and each end portion extends in a vertically opposite direction. Be provided And it formed.

Further, all the cut-and-raised portions except for a part of the step-like cut-and-raised portions are provided in the same direction as the projecting direction of the collar portion.

Further, the height of the cut-and-raised portion is set to be lower than one half of the lamination interval of the fins.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 shows a basic configuration of a heat exchanger used for an air conditioner.
Is a plurality of fins stacked in parallel at a predetermined interval, 2 is a plurality of hairpin-shaped heat transfer tubes orthogonal to the fins 1, 3
Reference numerals 4 denote connecting pipes connecting the open ends of the heat transfer tubes 2 in order, and 4 denotes support plates disposed on both sides of the fin group formed by lamination.

FIG. 2 is an enlarged plan view showing a part of the fin 1, and FIG. 3 is a perspective view showing a part of the fin 1 in a three-dimensional manner. A plurality of assembling holes 5 having a cylindrical collar portion 5a are provided at predetermined intervals, and a slit-like cut-and-raised portion 5b is provided in a central portion between the collar portions 5a-5a in a vertical direction. 5a, extending radially from its periphery in four directions, left and right, obliquely up and down, and each tip end extending in the opposite direction up and down in parallel with the fin end surface. 5c, 5d, 5e, and 5f are provided, and the rising surface 5g, 5h is provided at the windward end in front of the collar portion 5a for the air flow A flowing between the fins.
, And a hat-shaped cut-and-raised portion 5i is provided in which the respective tips extend in opposite directions.

Next, another fin 1A shown in FIG. 4 will be described. The difference between the fin 1A and the fin 1 described above is that the airflow A flowing between the fins has a rising face 5g, 5
h are provided vertically in opposite directions (front and back sides of the fin 1A), and stepped cut-and-raised portions 5j formed by extending the respective tips in the upper and lower directions are provided.

The above-described slit-shaped cut-and-raised portions 5b, 5c, 5d, 5e and 5f of the fins 1 and 1A and the hat-shaped cut-and-raised portion 5i of the fin 1 are all in the same direction as the projecting direction of the collar portion 5a. And the height of the fins 1 (1A) is set to be lower than one half of the lamination interval of the fins 1 (1A). Also, a step-like cut-and-raised portion 5j shown in FIG.
The height of the two rising surfaces 5g and 5h forming the fin 1 (1A) is lower than one half of the laminating interval of the fins 1 (1A) similarly to the cut-and-raised 5b and the like.

With such a fin 1, the collar 5
aBecause there is a cut-and-raised portion 7 effective for improving heat transfer to the air flowing between the fins 1 (1A) between the windward side end portion in front of and the peripheral portion of the collar portion 5a, and further between the collar portions 5a-5a, Heat transfer is promoted, resulting in improved heat exchange performance.

[0013]

According to the heat exchanger using the fins described above, the heat exchange rate with the air flowing between the fins is improved, stable cooling / heating capacity is obtained, and energy saving is achieved. It is also valid for this.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a heat exchanger according to the present invention and a conventional example.

FIG. 2 is an enlarged front view of a main part of the fin according to the first embodiment of the present invention.

FIG. 3 is an enlarged perspective view of a main part of the fin according to the first embodiment of the present invention.

FIG. 4 is an enlarged perspective view of a main part of a fin according to a second embodiment of the present invention.

5A and 5B show a conventional example, in which FIG. 5A is an enlarged view of a main part of the front of the fin, and FIG. 5B is a sectional view taken along the line AA of FIG.

FIGS. 6A and 6B show another conventional example, in which FIG. 6A is an enlarged view of a main part of the front of the fin, and FIG.
It is arrow sectional drawing.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fin 2 heat transfer tube 3 connecting tube 4 support plate 5 assembling hole 5a collar portion 5b slit-shaped cut and raised 5d slit shaped cut and raised 5e slit shaped cut and raised 5f slit shaped cut and raised 5g rising Surface 5h Rising surface 5i Hat-shaped cut and raised 5j Step-shaped cut and raised

Claims (4)

[Claims] A plurality of fins provided in a vertical direction at a center of a plate surface, and a plurality of fins stacked in parallel at predetermined intervals;
A plurality of heat transfer tubes inserted into the collar portion so as to be orthogonal to the fins, and a connecting tube connecting the open ends of the heat transfer tubes, and a slit-like shape is formed in the longitudinal direction of the central portion between the collar portions of the fins. A cut-and-raised portion is provided, and the collar portion is radially extended from its peripheral portion in four directions, left, right, diagonally up and down, and each tip portion is extended in the opposite direction in parallel with the fin end surface. While a slit-shaped cut-and-raised shape is provided in the shape of a く, the airflow flowing between the fins has a rising surface up and down at the windward end in front of the collar portion, and each end portion has A heat exchanger comprising a hat-shaped cut-and-raised portion extending in the opposite direction. 2. A plurality of fins having a plurality of collar portions in a vertical direction at a center of a plate surface, and a plurality of fins stacked in parallel at predetermined intervals;
A plurality of heat transfer tubes inserted into the collar portion so as to be orthogonal to the fins, and a connecting tube connecting the open ends of the heat transfer tubes, and a slit-like shape is formed in the longitudinal direction of the central portion between the collar portions of the fins. A cut-and-raised portion is provided, and the collar portion is radially extended from its peripheral portion in four directions, left, right, diagonally up and down, and each tip portion is extended in the opposite direction in parallel with the fin end surface. While a slit-shaped cut-and-raised shape is provided in the shape of a "U", the airflow flowing between the fins, on the windward end in front of the collar portion, has a rising surface in a vertically opposite direction, A heat exchanger comprising a stepped cut-and-raised portion having a tip portion extending in a direction opposite to the vertical direction. 3. The heat exchanger according to claim 1, wherein all the cut-and-raised portions except for a part of the step-like cut-and-raised portions are provided in the same direction as the projecting direction of the collar portion. 4. The height of the cut-and-raised portion is set to be less than half of the interval between the fins.
The heat exchanger as described.