JP2008185307A - Fin for heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fin for a heat exchanger improving heat exchange performance. <P>SOLUTION: The fin 10 for the heat exchanger is disposed in contact with tubes 20 in an air blowing space part SP provided between the tubes 20, 20 for blowing air and exchanging heat. A vertical row 32 of protrusions with a plurality of protrusion sets 31 arranged at spaces in an orthogonal direction to blast are provided as a plurality of protruding parts protruded from the plate surface of a plate part 12, wherein a pair of protrusions 30, 30 spaced in a blast orthogonal direction (RA) and inclined with respect to an air blowing direction are arranged in approximately truncated chevron shape so that a space is enlarged in the air blowing direction W. A plurality of vertical rows 32 of protrusions are provided in the air blowing direction W, and the blast upstream tip part of each protrusion 30 in the downstream vertical row 32 of protrusions is arranged overlapping the blast downstream direction of a protrusion space 34 formed between the protrusions of each protrusion set and a set space 35 formed between the protrusion sets in the upstream vertical row 32 of protrusions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat exchanger fin used for a heat exchanger used in a heat exchanger for an automobile or industrial machine such as a radiator for cooling an engine, a condenser of an air conditioner, and an evaporator, and in particular, in a flat portion of the fin. It is related with what the protrusion is formed.

2. Description of the Related Art Conventionally, a heat exchanger in which a plurality of corrugated plate-like heat exchanger fins and tubes through which a heat exchanger fluid flows is known.
And as a fin for heat exchangers, the flat plate part facing the corrugated fin is provided with a protrusion made of a protrusion or a cut and raised from the plate surface at a predetermined height to enhance the heat exchange performance with the air blower. Are known (for example, see Patent Document 1).
JP 2006-138503 A

However, the fin for the heat exchanger described above has a plurality of protrusions extending in a wave shape in a direction substantially orthogonal to the direction in which the air flows as protrusions at a constant height and a constant pitch.
For this reason, as viewed from the inlet direction of the blast, the ridges of the same height are arranged on the downstream side of the top of the ridges so as to overlap in the blast direction. It was difficult, and the heat exchange performance decreased on the leeward side.

  The present invention has been made paying attention to the conventional problems as described above, and an object thereof is to provide a heat exchanger fin capable of improving the heat exchange performance.

In order to achieve the above-mentioned object, the invention according to claim 1 is arranged in contact with the heat exchange member in a blower space provided between a heat exchange member that performs air exchange and heat exchange. A fin for a heat exchanger having a plurality of flat plate portions extending in the air blowing direction of the space portion, and having a plurality of protrusions protruding from the plate surface of the flat plate portion, and as the protrusions, the air blowing orthogonal direction A pair of protrusions that are spaced apart in the direction of air flow and that are inclined in the air blowing direction so that the distance between them extends in the air blowing direction. A plurality of rows of protrusions are provided in the air blowing direction, and each of the protrusions is connected to the upstream end of each of the protrusions on the downstream side. In the row of ridges, the ridge interval formed between the ridges of each ridge group and formed between the ridge groups It was heat exchanger fins, characterized in being arranged to overlap in the blast downstream of the set interval.
Moreover, the invention according to claim 2 is the fin for the heat exchanger according to claim 1, wherein each of the protrusions in the row of protrusions has a larger interval between the protrusions and a set interval than dimensions of the protrusions in the direction perpendicular to the air blowing direction. It was set as the fin for heat exchangers characterized by being formed in the dimension.
The invention according to claim 3 is the fin for the heat exchanger according to claim 1 or 2, wherein one of the protrusions in each protrusion column and the protrusion column immediately downstream thereof are provided. A fin for a heat exchanger is characterized in that one of the ridges is arranged in a straight line.

Furthermore, the invention according to claim 4 is the fin for a heat exchanger according to any one of claims 1 to 3, wherein a flat surface is provided between the protrusion column and the adjacent protrusion column. The heat exchanger fins are characterized by extending in the direction perpendicular to the air flow.
According to a fifth aspect of the present invention, in the heat exchanging fin according to any one of the first to fourth aspects, the flat plate portion is brought into contact with the heat exchanger in a corrugated corrugated fin. The heat exchanging fins are characterized in that the wave crests are connected to each other.

In the fin for the heat exchanger of the present invention, a ridge extending in the blowing direction is generated in the ridge inclined with respect to the blowing direction, but the next vertical column of eight-shaped ridges is arranged downstream of this vortex. For this reason, compared to the arrangement in which the protrusions are arranged so as to overlap in the blowing direction, the amount of blown air hitting the downstream protrusions is increased, and the heat exchange efficiency can be improved.
And since the protrusion is provided in the flat part of a fin, a contact area with a heat exchange member can be ensured, and heat exchange performance is securable also by this.

  Furthermore, in the invention described in claim 2, since the dimension in the direction perpendicular to the air flow of each interval arranged in front thereof is larger than the dimension in the direction perpendicular to the air flow of each protrusion, the dimension in the air orthogonal direction of each protrusion. As compared with the case where is smaller than the dimension in the direction perpendicular to the air blowing at each interval, the amount of air blown against each protrusion can be secured, and the heat exchange efficiency is further improved accordingly.

  In addition, in the invention described in claim 3, since one of the ridges is arranged in a straight line with the downstream ridge, it is compared with the one not arranged in a straight line. Thus, the vortex formed downstream of the blast by the ridge is guided to the downstream ridge one after another, and the heat exchange efficiency is further improved.

Further, in the invention described in claim 4, since the flat portion is provided between the ridge columns and the ridge columns, the protrusions and the protrusions are arranged in a straight line as in claim 3. The strips are separated from each other in the blowing direction, and a vortex of blowing is easily generated between them, so that the heat exchange performance described above can be exhibited.
In the invention according to claim 5, since the protrusion is formed on the flat plate portion excluding the wave crest portion that contacts the heat exchange member, the contact area between the heat exchanger fin and the heat exchange member can be secured. Thereby, heat exchange performance can be secured.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The heat exchanger fin of this embodiment is arranged in contact with the heat exchange member (20) in the air blowing space (SP) provided between the heat exchange member (20) that performs air exchange and heat exchange. A fin for a heat exchanger having a plurality of flat plate portions (12) extending in the air blowing direction of the blower space portion (SP) and having a plurality of protrusions protruding from the plate surface of the flat plate portion (12). And as said protrusion, a pair of protrusion (30) which was spaced apart in the ventilation orthogonal direction and inclined with respect to the ventilation direction is arranged in the shape of an approximately eight character so that a space | interval may spread in a ventilation direction. A plurality of ridge columns (32) in which a plurality of sets (31) are arranged at intervals in the air blowing orthogonal direction are provided, and a plurality of the ridge columns (32) are provided in the air blowing direction. 32) is a tip on the upstream side of each ridge (30) in the ridge column (32) on the downstream side. The section is a ridge interval (34) formed between the ridges of each ridge group (31) in the ridge column (32) on the upstream side, and an air flow of the group interval (35) formed between the ridge groups. It is a fin for heat exchangers characterized by being arranged in the downstream direction.

  Below, based on FIGS. 1-4, the heat exchanger A using the fin 10 for heat exchangers of Example 1 of the best embodiment of this invention is demonstrated.

As shown in FIG. 3, the heat exchanger A is configured by supporting the left and right sides of the core portion 1 with header tanks 2 and 3. The header tanks 2 and 3 are supplied and discharged with heat exchanger fluids such as cooling water and refrigerant.
The core portion 1 is formed by alternately stacking heat exchanger fins 10 and a plurality of tubes (heat exchange members) 20, and sandwiching the stacked layers between plates 5 and 5.

The tube 20 is formed in a rectangular plate shape by extruding a metal having high heat exchange efficiency such as aluminum or copper, and flow paths 20a and 20b through which a fluid for a heat exchanger flows are disposed in the extrusion direction. Is formed over the entire length.
Both end portions in the longitudinal direction of each tube 20 are inserted into the header tanks 2 and 3, respectively, and the fluid in the header tanks 2 and 3 passes through the flow paths 20a and 20b from one end to the other. It flows toward the end of the.

  The heat exchanger fins 10 are interposed in the ventilation space SP provided between the tubes 20 and 20 in order to help heat exchange of the tubes 20 to the outside air. For example, heat exchange of aluminum or copper is performed. Due to the metal having high efficiency, the substantially arcuate top portions 11 and the flat plate portions 12 connecting the top portions 11 are alternately continued, and in the form of a corrugated thin plate having a ventilation passage 13 between the opposed flat plate portions 12 and 12. Is formed.

  In the flat plate portion 12, a streak-like ridge 30 protruding toward the air passage 13 is formed over substantially the entire length in the air blowing direction indicated by the arrow W of the flat plate portion 12.

  As shown in FIG. 2, this ridge 30 has a plurality (n) of ridge columns 32 in which a pair of eight-shaped ridges 31 are arranged in the blowing orthogonal direction indicated by arrow RA in the blowing direction. It is provided and configured. In addition, the number in () of the right side of the code | symbol 32 in the figure has shown the order from the upstream of a ventilation direction.

  That is, the protrusion 30 is formed by press-molding the flat plate portion 12 so as to protrude into a semispherical cross-sectional shape with a smooth apex as shown in FIG. 4, and has a length in the blowing direction (W). It has a dimension of L and is inclined at an angle θ with respect to the blowing direction (W). And the protrusion set 31 arrange | positions a pair of protrusions 30 and 30 at intervals in the ventilation orthogonal direction (RA) (this space | interval is called the protrusion space | interval 34), and this protrusion space | interval 34 is blowing. It is arranged in a substantially eight-letter shape that extends symmetrically downstream.

A plurality of protrusions 31 are arranged in the direction perpendicular to the ventilation direction (RA) with an interval (this interval is referred to as an interval 35) to form one protrusion column 32.
In the first embodiment, the dimension P1 in the blower orthogonal direction (RA) with the rib interval 34 and the dimension P2 in the blower orthogonal direction (RA) with the set interval 35 are formed in the same dimension. Are arranged at a constant pitch. In addition, the dimensions P1 and P2 of the distances 34 and 35 are set to be slightly larger than the dimension H of the one protrusion 30 in the direction perpendicular to the ventilation (RA).

  Furthermore, between each protrusion column 32 and the protrusion column 32, the row | line | column space | interval 33 formed in the ventilation direction (W) with the flat surface of the dimension L2 is provided in the ventilation orthogonal direction (RA).

  And each protrusion row | line | column 32 is arrange | positioned by shifting the pitch P2 of each protrusion set 31 adjacent to the ventilation direction (W) and 1/4 pitch in the ventilation orthogonal direction (RA). Therefore, the ridge 30 of the next ridge column 32 is downstream of the ridge interval 34 and the assembly interval 35 on the upstream side of the blast column 32 in the blowing direction (W). For example, one of the pair of protrusions 30 and 30 constituting the protrusion set 31 is arranged side by side in a straight line as shown by a one-dot chain line a in FIG. Has been.

Next, the operation of the first embodiment will be described.
In the heat exchanger A of the first embodiment, in FIG. 3, when the air flow flows across the core portion 1 from the front surface of the core portion 1 as indicated by the arrow W, The air passage 13 shown in FIG.

At this time, the blast flowing along the flat plate portion 12 proceeds while changing the direction obliquely in the extending direction of the ridges 30, and at this time, a vortex wp extending in the extending direction of the ridges 30 is generated. As shown in the drawing, these vortices wp are opposite in direction above and below the ridge 30, and the ridges downstream of the vortex wp are formed at a portion where the vortex wp in the opposite direction merges to generate turbulence. The ridges 30 in the column 32 are arranged.
For this reason, the contact area of the protrusion 30 and ventilation is increased, and the heat exchange efficiency is improved.
And such an effect | action is repeated in each protrusion row | line | column 32 toward air flow from upstream to downstream.

And since one of a pair of protrusion 30 is arrange | positioned along with the straight line (a), it is guide | induced to this straight line direction, and air can be efficiently heat-exchanged, without airflow being delayed by the above-mentioned turbulent flow.
Further, since the protrusion 30 is provided not on the entire surface of the heat exchanger fin 10 but on the flat plate portion 12 except for the top portion 11, the contact area with the tube 20 is ensured as compared with the case where it is provided on the top portion 11. This also ensures heat exchange performance.

  Furthermore, since the dimension of the air blow orthogonal direction (RA) of each space | interval P1, P2 arrange | positioned ahead is formed rather than the dimension H of the air blow orthogonal direction (RA) of each protrusion 30, the air flow of each protrusion 30 is formed. Compared with the case where the dimension H in the orthogonal direction (RA) is smaller than the dimension in the blowing orthogonal direction (RA) of the intervals P1 and P2, it is possible to secure the amount of air blown against each protrusion 30 and further increase the heat exchange efficiency. improves.

  Next, a heat exchanger fin 210 according to Example 2 of the embodiment of the present invention will be described with reference to FIG. Since the second embodiment is a modification of the first embodiment, only the difference will be described, and the description of the same configuration and operational effects as the first embodiment will be omitted.

In the second embodiment, the protrusions 30a and 30b formed on the flat plate portion 12 of the heat exchanger fins 210 are formed in every two rows of the protrusion columns 32 so that the protruding directions thereof are reversed. That is, in FIG. 5, the protrusion 30a protrudes in the left direction in the figure, and the protrusion 30b protrudes in the right direction in the figure.
In addition, since an effect is the same as that of Example 1, description is abbreviate | omitted.

  As described above, the embodiment of the present invention and Examples 1 and 2 have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment and Examples 1 and 2, and the present invention is not limited thereto. Design changes that do not depart from the gist are included in the present invention.

For example, in the first and second embodiments, the tube 20 through which the fluid for the heat exchanger flows is shown as the heat exchange member. However, the heat exchange member is not limited to the one through which the fluid flows in this way, for example, Alternatively, a PCT heater that generates heat when energized may be used.
In the first and second embodiments, the tube 20 includes the two flow paths 20a and 20b. However, the shape and number of the flow paths 20a and 20b are not limited to this, and many Other shapes such as those having small holes can be used.
Furthermore, although the tube 20 of Example 1, 2 showed what was formed by extrusion molding, it is not limited to this, A metal thin plate is bend | folded like the tube 620 shown in FIG. 6, and it press-molds. You may make it use what was formed. In addition, 620a is a flow path through which the heat exchange medium flows.

  Moreover, in Example 1, 2, although the corrugated sheet-like thing was shown as the fin 10 for heat exchangers, if it has a some flat plate part, the shape will be limited to a corrugated sheet-like thing. For example, the top 11 may be formed in a rectangular plane instead of an arc.

In the first and second embodiments, the protrusions 31 are arranged at a constant pitch, but those arranged at an indefinite pitch may be used.
Furthermore, in Examples 1 and 2, although the dimension P1, P2 of the protrusion interval 34 and the set interval 35 was shown larger than the dimension H of the protrusion 30 in the air blower orthogonal direction (RA), Although not limited, even if these dimensions P1 and P2 are smaller than the dimension H, the air that has passed through the gaps 34 and 35 efficiently hits the downstream ridge 30 and has good heat. Exchange efficiency is obtained. Further, the inclination angle θ of the protrusion 30 and its length L are not limited to the angles and lengths shown in the first and second embodiments.

It is a perspective view which shows the fin 10 for heat exchangers of Example 1 of the best form of this invention, and the tube 20 laminated | stacked on this. It is explanatory drawing of arrangement | positioning and arrangement | sequence of the protrusion 30 of the fin 10 for heat exchangers of Example 1. FIG. It is a perspective view of the heat exchanger A to which the fin 10 for heat exchangers of Example 1 is applied. It is sectional drawing of the principal part of the fin 10 for heat exchangers of Example 1. FIG. It is a perspective view which shows the fin 210 for heat exchangers of Example 2, and the tube 20 laminated | stacked on this. It is a perspective view which shows the other example of a tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heat exchanger fin 11 Top part 12 Flat plate part 13 Blower passage 20 Tube 30 ridge 31 ridge group 32 ridge column 33 row interval 34 ridge interval 35 group interval A heat exchanger SP ventilation space part

Claims (5)

A plurality of flat plate portions arranged in contact with the heat exchange member and extending in the air blowing direction of the air blowing space, in the air blowing space provided between the heat exchange members performing air exchange and heat exchange, A heat exchanger fin having a plurality of protrusions protruding from the plate surface of the flat plate part,
As the protrusions, a pair of protrusions that are spaced apart in the blowing direction and inclined with respect to the blowing direction are arranged in an approximately eight-letter shape so that the interval is widened in the blowing direction. A plurality of ridge columns arranged at intervals are provided, and a plurality of ridge columns are provided in the blowing direction,
The ridge column includes a ridge interval formed between the ridges of each ridge group in the upstream ridge column and the ridge upstream end of each ridge in the downstream ridge column. A heat exchanger fin, wherein the fins are arranged so as to overlap in the downstream direction of the air flow between the groups formed between the groups.   2. The fin for a heat exchanger according to claim 1, wherein each of the protrusion columns is formed such that the protrusion interval and the set interval are larger than the dimension of each protrusion in the direction perpendicular to the air blowing direction.   One ridge of the ridge group of each ridge column and one ridge of the ridge group of the protrusion column immediately downstream thereof are arranged in a straight line. The fin for heat exchangers of Claim 1 or Claim 2.   4. The heat exchanger according to claim 1, wherein a flat surface extends in a direction perpendicular to the air flow between the protrusion column and the adjacent protrusion column. 5. fin.   The said flat plate part is a part which connects the wave crest parts contact | abutted by the said heat exchanger in a corrugated fin of a corrugated sheet shape, The Claim 1 characterized by the above-mentioned. Fin for heat exchange.

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