JP2008121921A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for easily producing a flat plate-like fin to be numerously laminated in a fin-and-tube type heat exchanger comprising a number of flat plate-like fins laminated in parallel with each other at a certain pitch and flat heat transfer tubes inserted at a substantially right angle into the fins at a predetermined pitch, and to effectively utilize the surface area of the fins. <P>SOLUTION: When the fin 19 is produced, a working pilot hole 22 is provided on the surface of the fin 19. According to this, a number of fins can be accurately mass-produced in a stable shape. Further, the surface area of the fin 19 is effectively used due to the arrangement position of the pilot hole 22, deterioration in performance of the heat exchanger is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is used in an air conditioner, a refrigerator, and the like, and is composed of a gas such as air flowing between a plurality of stacked flat fins and a fluid such as water and refrigerant flowing in a flat heat transfer tube. The present invention relates to a fin-and-tube heat exchanger that transfers heat between the two.

  In general, a fin-and-tube heat exchanger composed of a large number of laminated flat fins and flat heat transfer tubes is laminated in parallel at a constant pitch as shown in FIG. A large number of plate-like fins 19 through which a gas such as air flows, and inserted into these fins 19 at a predetermined pitch at a substantially right angle, a fluid such as water or refrigerant flows inside, and the outer periphery of the cross-section is flat. The heat transfer tube 14 and both ends of the heat transfer tube 14 are connected to each other, and the header 11 that forms the refrigerant flow path together with the heat transfer tube 14 is manufactured (see, for example, Patent Document 1).

And as shown in FIG. 7, the fin 19 of the conventional heat exchanger is provided with the fitting groove 21 in consideration of assemblability, and the heat transfer tube 14 is inserted.
Japanese Patent Laid-Open No. 4-177091

  However, in the conventional configuration, the fins 19 have a shape that is difficult to produce by press working, and the pilot holes 22 that serve as a reference are required for mass production. However, the provision of the pilot hole 22 has a problem that the surface area of the fin 19 is reduced and the heat exchange performance is lowered.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an easy production method for a large number of stacked flat fins and a heat exchanger capable of effectively utilizing the surface area of the fins. .

  In order to solve the above-mentioned conventional problems, the heat exchanger of the present invention is provided with pilot holes for processing at a certain pitch on the surface of the fin.

  As a result, a large number of fins can be mass-produced with a precise and stable shape when pressing the fins.

  In addition, the heat exchanger of the present invention has a fin processing pilot hole, the surface area of the fin is reduced, the heat exchange performance is lowered, and the hole position for preventing fin collapse in the heat exchanger bending process is provided. It is set.

  As a result, a large number of mass-produced products can be produced in a precise and stable shape without deteriorating the performance of the heat exchanger.

  The heat exchanger of the present invention is provided with pilot holes for machining at a certain pitch on the surface of the fins, and can be mass-produced in large numbers with a stable shape with high precision when pressing, and at the pilot hole position. It is possible to prevent the performance deterioration of the heat exchanger.

  In the first invention, a pilot hole for processing is provided on the surface of the fin. According to this configuration, a large number of fins can be mass-produced with a stable and accurate shape when the fin is pressed.

  In particular, according to the second invention, in the heat exchanger of the first invention, by reducing the holes for fin processing, the surface area of the fins can be ensured, and deterioration of the heat exchange performance can be prevented.

  According to a third aspect of the invention, in particular, in the heat exchanger of the first or second aspect of the invention, the performance of the heat exchanger is maximized by setting the pilot holes for processing to positions where the heat conduction of the fins can be used effectively. To the limit.

  According to a fourth aspect of the invention, in particular, when the heat exchanger according to any one of the first to third aspects of the invention is bent, the pilot hole position is set to an outside position that does not hinder the bending, so that the fin collapses or the flat tube It is possible to maximize the performance of the heat exchanger.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of fins stacked on the heat exchanger according to the first embodiment of the present invention, and FIG. 2 is a view illustrating fins stacked on the heat transfer tubes of the heat exchanger according to the first embodiment of the present invention shown in FIG. It is an enlarged view of a state.

  In FIG. 1 and FIG. 2, the fin 19 is provided with a fitting groove 21 for inserting the heat transfer tube 14 having a flat cross-sectional outer periphery into the fin 19 at a predetermined pitch at a substantially right angle. When the heat pipes 14 are combined, pilot holes 22 at the time of fin processing are provided so that the fin pitch Pf is constant.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, by providing the pilot holes 22 on the surface of the fins, a large number of mass-produced products can be produced in a stable and accurate shape when the fins are pressed.

  Further, in the present embodiment, the height of the pilot holes 22 is constant, so that the fin pitches Pf are equally spaced, and excellent ventilation characteristics and heat transfer performance can be obtained.

(Embodiment 2)
FIG. 3 is a front view of fins stacked on the heat exchanger according to the second embodiment of the present invention.

  In FIG. 3, pilot holes 22a for pressing the fins 19a are provided in the fins 19a, and the processing pilot holes 22a are reduced in order to secure the surface area of the fins 19a.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, since the fins 19a are provided with pilot holes 22a for pressing the fins 19a, they can be mass-produced in a stable and accurate shape when the fins 19a are pressed.

  Moreover, in this Embodiment, the surface area of the fin 19a is ensured by reducing the pilot hole 22a, and the outstanding heat transfer performance can be obtained.

(Embodiment 3)
FIG. 4 is a front view of fins stacked on the heat exchanger according to the third embodiment of the present invention.

  In FIG. 4, the fin 19b is provided with a pilot hole 22b for pressing the fin 19b, and the pilot hole 22b is provided on the leeward side to allow the fin 19b to exchange heat effectively.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, since the fins 19b are provided with pilot holes 22b for pressing the fins 19b, a large number of masses can be produced in a stable and accurate shape when the fins 19b are pressed.

  In the present embodiment, the pilot hole 22b is arranged on the leeward side, whereby heat exchange of the fins 19b on the leeward side is activated and excellent heat transfer performance can be obtained.

(Embodiment 4)
FIG. 5 is a top view of the front view of the fins laminated on the heat exchanger in the fourth embodiment of the present invention and the bent heat exchanger combined with the fins.

  In FIG. 5, a pilot hole 22c for pressing the fin 19c is provided in the fin 19c, and the pilot hole position is provided at an outer position that does not hinder bending when the heat exchanger is bent. Yes.

  About the heat exchanger comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, since the fins 19c are provided with pilot holes 22c for pressing the fins 19c, a large number can be mass-produced in a stable and accurate shape when the fins 19c are pressed.

  Further, in the present embodiment, the pilot hole 22c is arranged outside the heat exchanger when bending, thereby preventing fin collapse and flat tube squeezing and maximizing the performance of the heat exchanger. it can.

  As described above, the heat exchanger according to the present invention can provide an easy production method for plate-shaped fins stacked in a large number and a heat exchanger that can effectively utilize the surface area of the fins. Therefore, it is used in air conditioners, refrigerators, refrigerators, etc., and there is a relationship between a gas such as air that flows between a large number of stacked flat fins and a fluid such as water and refrigerant that flows in a flat heat transfer tube. The present invention can be widely applied to fin-and-tube heat exchangers that exchange heat between them.

The front view of the fin laminated | stacked on the heat exchanger in Embodiment 1 of this invention The enlarged view of the fin laminated | stacked on the heat exchanger in Embodiment 1 of this invention The front view of the fin laminated | stacked on the heat exchanger in Embodiment 2 of this invention The front view of the fin laminated | stacked on the heat exchanger in Embodiment 3 of this invention (A) Front view of fins laminated on heat exchanger in embodiment 4 of the present invention (b) Top view of bent heat exchanger combined with fins Front view of conventional heat exchanger (A) Exploded view before assembling fins stacked in a conventional heat exchanger (b) Exploded view before assembling fins stacked in a conventional heat exchanger

Explanation of symbols

11 Header 14, 14a, 14b, 14c Heat transfer tube 19, 19a, 19b, 19c Fin 21 Fitting groove 22, 22a, 22b, 22c Pilot hole Pf Fin pitch

Claims (4)

A plurality of plate-like fins that are stacked in parallel at a constant pitch, and a gas such as air flows between them, and are inserted at a predetermined pitch substantially perpendicular to the fins, and are closely bonded to the fins, A fin-and-tube heat exchanger comprising a heat transfer tube having a flat cross-section outer periphery through which a fluid such as water or refrigerant flows, wherein heat is provided with a pilot hole for processing the fin Exchanger. The heat exchanger according to claim 1, wherein pilot holes for fin processing are reduced. The heat exchanger according to claim 1 or 2, wherein the processing pilot hole is a position where the heat conduction of the fin can be effectively used. The heat exchanger according to any one of claims 1 to 3, wherein the processing pilot hole is positioned so as not to hinder bending of the heat exchanger.

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