JP6911549B2 - Heat exchanger and corrugated fins - Google Patents

Description

The present invention relates to heat exchangers and corrugated fins.

Conventionally, heat exchangers that exchange heat between fluids are known. When a heat exchanger is used as an evaporator, if condensed water stays on the surface of fins provided on the outside of the tube through which the refrigerant flows, the airflow resistance increases due to clogging of the condensed water in the gaps between the fins, resulting in heat. There is a problem that the heat exchange performance by the exchanger is lowered.

The heat exchanger described in Patent Document 1 forms irregularities on the surface of fins by oxidizing the fins by the heat generated when welding the plate fins and the tube, and enhances the hydrophilicity of the surface to improve the drainage property. ing. Thereby, this heat exchanger prevents the condensed water from staying on the surface of the plate fins and prevents the increase of the ventilation resistance of the gap between the fins.

Japanese Patent No. 5661202

The heat exchanger described in Patent Document 1 uses plate fins. However, when high heat exchange performance is required for the heat exchanger, it is desirable to use corrugated fins having higher heat exchange performance than plate fins.

However, in the heat exchanger described in Patent Document 1 described above, the surface of the fins is oxidized to form irregularities. Therefore, if the irregularities are locally concentrated and formed, the rigidity of the fins decreases. Can be considered. When a plate-shaped member having such irregularities is bent at predetermined intervals to form a corrugated fin, the corrugated fin buckles during the bending step or the step of aligning the mountain heights of the fins, and the moldability deteriorates. There is a risk.

In view of the above points, it is an object of the present invention to provide a heat exchanger capable of improving the drainage property of the corrugated fin and improving the moldability of the corrugated fin, and a corrugated fin.

In order to achieve the above object, the invention according to claim 1 is a heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which the plate-shaped member (100) is bent at predetermined intervals, a fin main body portion (13) arranged between the bent portions, and a fin main body portion. Corrugated fins (10) that have a partially cut-out louver (14) and enhance the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, the groove portions are provided with a plurality of groove portions arranged at predetermined intervals.
The corrugated fin has a first plate thickness portion (T1, T3, T4) provided with a groove portion and a second plate thickness portion thicker than the first plate thickness portion in a cross-sectional view in the direction in which the bent portion extends. It is configured to include the plate thickness part (T2) of.
The plurality of grooves have a width (w) of 10 to 50 μm, a depth (h) of 10 μm or more, and a pitch (p) of the plurality of grooves of 50 to 200 μm. It enhances hydrophilicity and
The plurality of grooves are provided including the bent portion and the louver, and promote drainage from the fin main body portion to the bent portion or the surface of the tube.

According to this, by arranging a plurality of grooves arranged on the surface of the corrugated fin so as to be arranged at a predetermined interval, the hydrophilicity of the surface of the corrugated fin is increased and the drainage property is improved. Therefore, it is possible to prevent the condensed water from staying on the surface of the corrugated fin. Therefore, this heat exchanger can prevent an increase in the ventilation resistance of the gap between the corrugated fins and improve the heat exchange performance.

Further, the corrugated fin is rigid in the direction in which the bent portion is extended by intermittently arranging the second plate thick portion thicker than the first plate thickness portion in the direction in which the bent portion is extended. Will be higher. Therefore, for example, when the plate-shaped member is bent to form a bent portion at the time of molding the corrugated fin, the corrugated fin is prevented from buckling at the bent portion. Further, for example, when forming a corrugated fin or manufacturing a heat exchanger, when a compressive force is applied from a direction perpendicular to the bent portion, the corrugated fin is prevented from buckling at the fin main body portion.

The second plate-thick portion, which is thicker than the first plate-thick portion, is shallow to the extent that it does not contribute to the improvement of the hydrophilicity of the fin surface, in addition to the portion where the plate-shaped member is not provided with a groove. It also includes a portion provided with a groove or a recess (for example, a depth of several μm).

The invention according to claim 9 is a heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portions, and a part of the fin main body portion. Corrugated fins (10) that have a cut-up louver (14) and enhance the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin. With multiple grooves extending to,
The plurality of grooves have a width (w) of 10 to 50 μm, a depth (h) of 10 μm or more, and a pitch (p) of the plurality of grooves of 50 to 200 μm. It enhances hydrophilicity and
The plurality of grooves are provided including the bent portion and the louver, and promote drainage from the fin main body portion to the bent portion or the surface of the tube.

According to this, the invention according to claim 9 can exert the same action and effect as the invention according to claim 1.

Further, in the invention according to claim 9, for example, when a plate-shaped member is bent to form a bent portion, or when a compressive force is applied to the formed bent portion from a direction perpendicular to the bent portion, the corrugated fin is generated. The stress becomes substantially uniform in the direction orthogonal to the direction in which the bent portion extends. Therefore, it is possible to more reliably prevent the corrugated fin from buckling at the bent portion and the fin main body portion during molding of the corrugated fin.
The invention according to claim 17 is
A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portions, and a part of the fin main body portion are cut. A corrugated fin (10) having a raised louver (14) and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin.
It is provided with a plurality of grooves extending diagonally with respect to the extending direction of the bent portion.
The plurality of grooves are provided including the bent portion and the louver to promote drainage from the fin body portion to the bent portion or the surface of the tube.
A plurality of grooves are provided symmetrically with respect to a virtual surface (VS) including the center of the bent portion and perpendicular to the direction in which the bent portion extends.
Assuming that a plurality of grooves are the first groove group (110),
On the surface of the corrugated fin, a plurality of grooves are arranged at predetermined intervals, and a second groove group (120) extending in a direction intersecting the first groove group is further provided.
The groove forming the first groove group provided on one surface of the corrugated fin in the plate thickness direction and the groove forming the first groove group provided on the other surface of the corrugated fin in the plate thickness direction are , It is provided at a position shifted in the plate thickness direction.
The invention according to claim 18 is
A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portions, and a part of the fin main body portion are cut. A corrugated fin (10) having a raised louver (14) and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin.
It is provided with a plurality of grooves extending diagonally with respect to the extending direction of the bent portion.
The plurality of grooves are provided including the bent portion and the louver to promote drainage from the fin body portion to the bent portion or the surface of the tube.
Assuming that a plurality of grooves are the first groove group (110),
On the surface of the corrugated fin, a plurality of grooves are arranged at predetermined intervals, and a second groove group (120) extending in a direction intersecting the first groove group is further provided.
The groove forming the first groove group provided on one surface of the corrugated fin in the plate thickness direction and the groove forming the first groove group provided on the other surface of the corrugated fin in the plate thickness direction are , It is provided at a position shifted in the plate thickness direction.
The invention according to claim 19
A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portions, and a part of the fin main body portion are cut. A corrugated fin (10) having a raised louver (14) and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin.
It is provided with a plurality of grooves extending diagonally with respect to the extending direction of the bent portion.
The plurality of grooves are provided including the bent portion and the louver to promote drainage from the fin body portion to the bent portion or the surface of the tube.
Assuming that a plurality of grooves are the first groove group (110),
On the surface of the corrugated fin, a plurality of grooves are arranged at predetermined intervals, and a second groove group (120) extending in a direction intersecting the first groove group is further provided.
The groove forming the first groove group provided on one surface of the corrugated fin in the plate thickness direction and the groove forming the first groove group provided on the other surface of the corrugated fin in the plate thickness direction are , When viewed from the same plate thickness direction, the angles with respect to the direction in which the bent portion extends are different.

The reference numerals in parentheses attached to each of the above configurations indicate an example of the correspondence with the specific configurations described in the embodiments described later.

It is a perspective view of the heat exchanger which concerns on 1st Embodiment. It is a partial enlarged view of a heat exchanger. It is a partially enlarged view of FIG. It is an enlarged view of the cross section of the IV-IV part of FIG. It is a top view of the plate-shaped member which comprises the corrugated fin which concerns on 1st Embodiment. It is a partially enlarged view of FIG. FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. It is sectional drawing of the IX-IX line of FIG. It is explanatory drawing for demonstrating the flow of condensed water. It is explanatory drawing for demonstrating the flow of condensed water. It is a perspective view of the corrugated fin which is not provided with a groove. It is a perspective view of the corrugated fin provided with the groove part along the direction in which the bent part extends. It is sectional drawing of the XIVA-XIVA line, the XIVB-XIVB line, and the XIVC-XIVC line of FIG. It is a perspective view of the corrugated fin provided with the groove part diagonally with respect to the direction in which the bent part extends. FIG. 15 is a cross-sectional view of the XVIA-XVIA line, the XVIB-XVIB line, and the XVIC-XVIC line of FIG. FIG. 3 is an analysis diagram showing stress generated according to a position in the longitudinal direction when a load is applied to the corrugated fins shown in FIGS. 12, 13, and 14. It is a schematic diagram which showed an example of the molding process of a corrugated fin. It is a schematic diagram which showed an example of the molding process of a corrugated fin. It is sectional drawing of the corrugated fin. It is a schematic diagram which showed an example of the manufacturing process of a heat exchanger. It is a top view which shows the surface of the plate-shaped member which comprises the corrugated fin which concerns on 2nd Embodiment. It is a top view which shows the back surface of the plate-shaped member which comprises the corrugated fin which concerns on 2nd Embodiment. It is a top view which shows both the front surface and the back surface of the plate-shaped member constituting the corrugated fin which concerns on 2nd Embodiment. It is an enlarged view of the cross section of the XXV-XXV line of FIG. 24. It is a top view of the plate-shaped member which comprises the corrugated fin which concerns on 3rd Embodiment. It is a top view which shows the surface of the plate-shaped member which comprises the corrugated fin which concerns on 4th Embodiment. It is a top view which shows the back surface of the plate-shaped member which comprises the corrugated fin which concerns on 4th Embodiment. It is a top view which shows both the front surface and the back surface of the plate-shaped member constituting the corrugated fin which concerns on 4th Embodiment. It is an enlarged view of the cross section of the XXXX-XXX line of FIG. 28. It is a top view of the plate-shaped member which comprises the corrugated fin which concerns on 5th Embodiment. It is a top view of the plate-shaped member which comprises the corrugated fin which concerns on 6th Embodiment. It is a partially enlarged view of the corrugated fin of a reference example. It is a schematic diagram which showed an example of the molding process of the corrugated fin of a reference example. It is sectional drawing of the corrugated fin of a reference example. It is a schematic diagram which showed an example of the molding process of the corrugated fin of a reference example. It is sectional drawing of the corrugated fin of a reference example. It is sectional drawing of the corrugated fin of a reference example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the following embodiments, the same or equal parts are designated by the same reference numerals, and the description thereof will be omitted. Further, in the drawing, in order to avoid confusion between the line indicating the groove provided in the corrugated fin and the hatch indicating the cross section of the corrugated fin, the hatching indicating the cross section of the corrugated fin is omitted.

(First Embodiment)
The first embodiment will be described with reference to the drawings. The heat exchanger 1 of the present embodiment is used, for example, as an evaporator that constitutes a part of a refrigeration cycle that harmonizes air in a vehicle interior. The evaporator exchanges heat between the refrigerant as the first fluid that circulates in the refrigeration cycle and the air as the second fluid that passes through the heat exchanger 1, and cools the air by the latent heat of evaporation of the refrigerant. In FIG. 1, the direction of air flow through the heat exchanger 1 is indicated by arrow AF.

As shown in FIGS. 1 and 2, the heat exchanger 1 includes a corrugated fin 10, a tube 20, first to fourth header tanks 21 to 24, an outer frame member 25, a pipe connecting member 26, and the like. These members are formed of, for example, aluminum, and the members are joined to each other by brazing.

The plurality of tubes 20 are arranged at predetermined intervals in a direction intersecting the air flow direction. Further, the plurality of tubes 20 are arranged in two rows on the upstream side and the downstream side in the air flow direction. Each of the plurality of tubes 20 extends linearly from one end to the other end. One end of the plurality of tubes 20 is inserted into the first header tank 21 or the second header tank 22, and the other end is inserted into the third header tank 23 or the fourth header tank 24. The first to fourth header tanks 21 to 24 distribute the refrigerant to the plurality of tubes 20 and collect the refrigerants flowing in from the plurality of tubes 20.

An air passage through which air flows is formed in a plurality of gaps formed between the plurality of tubes 20. The corrugated fin 10 is provided in the air passage. That is, the corrugated fin 10 of the present embodiment is an outer fin provided on the outside of the tube 20. The corrugated fin 10 enhances the heat exchange efficiency between the refrigerant and the air by increasing the heat transfer area between the refrigerant flowing inside the tube 20 and the air flowing outside the tube 20.

An outer frame member 25 is provided on the outside in the direction in which the plurality of tubes 20 and the plurality of corrugated fins 10 are alternately arranged. A pipe connecting member 26 is fixed to the outer frame member 25. The pipe connecting member 26 is provided with a refrigerant inlet 27 to which the refrigerant is supplied and a refrigerant outlet 28 for discharging the refrigerant. The refrigerant that has flowed into the first header tank 21 from the refrigerant inlet 27 flows through the first to fourth header tanks 21 to 24 and the plurality of tubes 20 in a predetermined path, and flows out from the refrigerant outlet 28. At that time, the air flowing through the air passage provided with the corrugated fins 10 is cooled by the latent heat of vaporization of the refrigerant flowing through the first to fourth header tanks 21 to 24 and the plurality of tubes 20.

2 and 3 show an enlarged view of the corrugated fin 10. The corrugated fin 10 has a structure in which plate-shaped members 100 are bent at predetermined intervals. The corrugated fin 10 has a plurality of bent portions 12 and a fin main body portion 13. The plurality of bent portions 12 are portions where the plate-shaped members 100 constituting the corrugated fin 10 are bent at predetermined intervals. The fin main body portion 13 is a portion arranged between the bent portion 12 and the bent portion 12. The fin main body 13 is provided with a plurality of louvers 14 in which a part of the plate-shaped member 100 is cut and raised. The outer wall of the corrugated fin 10 on the tube 20 side and the outer wall of the tube 20 are joined by brazing.

A plurality of fine groove portions 11 are provided on the surface of the corrugated fin 10. The plurality of groove portions 11 are provided so that the groove portions 11 are arranged at a predetermined interval. In each drawing referred to in the present embodiment, for the sake of explanation, a plurality of groove portions 11 provided on the surface of the corrugated fin 10 are schematically shown in a large size. This also applies to the reference examples described later and the drawings referred to in the second to sixth embodiments.

The plurality of groove portions 11 are provided in the bent portion 12 and the fin main body portion 13 of the corrugated fin 10. Further, the plurality of groove portions 11 are also provided in the louver 14. In the present embodiment, the plurality of groove portions 11 extend obliquely with respect to the direction in which the bent portion 12 extends.

FIG. 4 is an enlarged view of a cross section of the IV-IV portion of FIG. As shown in FIG. 4, the corrugated fin 10 is more than the first plate-thick portion T1 and the first plate-thick portion T1 in which the groove portion 11 is provided in a cross-sectional view parallel to the direction in which the bent portion 12 extends. It is configured to include a second plate-thick portion T2 having a thick plate thickness. The second plate-thick portion T2, which is thicker than the first plate-thick portion T1, contributes to the improvement of the hydrophilicity of the fin surface in addition to the portion where the groove portion 11 is not provided in the plate-shaped member 100. It also includes a portion provided with a groove or a recess (for example, a depth of several μm) that is shallow enough not to be provided. As a result, in the corrugated fin 10, the second plate thickness portion T2 is intermittently arranged in the direction in which the bent portion 12 extends, so that the rigidity of the fin in the direction in which the bent portion 12 extends becomes high. ing. The corrugated fin 10 may be configured to include a plate thickness portion other than that shown in the figure in addition to the first plate thickness portion T1 and the second plate thickness portion T2. Further, the shape of the groove portion 11 is not limited to that shown in the figure, and can be arbitrarily set. It should be noted that the plate thickness portions T3 and T4 in which the groove portion 11 is provided on one surface or the other surface in the plate thickness direction of the corrugated fin 10 also has the first groove portion 11 provided with respect to the corrugated fin 10. It can be said that it is a thick part.

FIG. 4 shows an example of the width, depth, and pitch of the groove portion 11. The width w of the groove portion 11 is preferably 10 to 50 μm. The depth h of the groove portion 11 is preferably 10 μm or more. The pitch p of the groove portion 11 is preferably 50 to 200 μm. This makes it possible to increase the hydrophilicity of the surface of the corrugated fin 10. When the hydrophilicity of the surface of the corrugated fin 10 is increased, the drainage property of the corrugated fin 10 is improved, and the condensed water is prevented from staying on the surface of the corrugated fin 10. Therefore, since it is possible to prevent the ventilation resistance of the air passage from increasing due to the retention of the condensed water, the heat exchanger 1 can improve the heat exchange performance.

FIG. 5 is a plan view of the plate-shaped member 100 constituting the corrugated fin 10. The corrugated fin 10 is formed into a corrugated plate by being bent at the position indicated by the alternate long and short dash line 12a in FIG. In FIG. 5, the position where the louver 14 is provided on the plate-shaped member 100 is indicated by a broken line 14a. Further, in FIG. 5, the virtual surface VS including the center of the bent portion 12 (that is, the center in the width direction of the plate-shaped member 100) and perpendicular to the direction in which the bent portion 12 extends is shown by the alternate long and short dash line VS. ing. The plurality of groove portions 11 are provided symmetrically with respect to the virtual surface VS. The same applies to FIGS. 22 to 24, 26 to 29, 31 and 32, which are referred to in the description of the second to sixth embodiments described later.

Further, in FIG. 5, the angle formed by the direction in which the plurality of groove portions 11 extend and the virtual surface VS is shown by θ1. As described above, the plurality of groove portions 11 extend obliquely with respect to the direction in which the bent portion 12 extends. At that time, in the present embodiment, it is preferable to provide the angle θ1 formed by the direction in which the plurality of groove portions 11 extend and the virtual surface VS in the range of 20 ° ≦ θ1 ≦ 70 °.

Further, the corrugated fin 10 of the present embodiment has a first groove group 110 composed of a plurality of groove portions 11 and a second groove portion 11 composed of a plurality of groove portions 11 extending in a direction intersecting the first groove portion group 110. A groove group 120 is provided. As described above, the first groove portion group 110 is composed of a plurality of groove portions 11 provided so that the angle formed by the extending direction of the plurality of groove portions 11 and the virtual surface VS is θ1. On the other hand, the second groove portion group 120 refers to a group composed of a plurality of groove portions 11 provided so that the angle formed by the direction in which the plurality of groove portions 11 extend and the virtual surface VS is θ2. In this embodiment, θ1 is + 45 ° and θ2 is −45 °. That is, θ1 and θ2 have different angles.

The plurality of groove portions 11 constituting the first groove portion group 110 are provided so that the groove portions 11 are arranged at a predetermined interval. The plurality of groove portions 11 constituting the second groove portion group 120 are also provided so that the groove portions 11 are arranged at a predetermined interval. Further, the groove portion 11 forming the first groove portion group 110 and the groove portion 11 forming the second groove portion group 120 are provided so as to be connected from the fin main body portion 13 to the bent portion 12.

Further, as shown in FIG. 4, the plurality of groove portions 11 are provided on one surface 10a of the corrugated fin 10 in the plate thickness direction and the other surface 10b of the corrugated fin 10 in the plate thickness direction. In the following description, one surface 10a of the corrugated fin 10 in the plate thickness direction is referred to as a first surface 10a, and the other surface 10b of the corrugated fin 10 in the plate thickness direction is referred to as a second surface 10b. In the present embodiment, the first surface 10a is provided with the first groove group 110 and the second groove group 120, and the second surface 10b is also provided with the first groove group 110 and the second groove group 120.

10 and 11 are explanatory views for explaining the flow of condensed water in the heat exchanger 1. When the heat exchanger 1 is used as an evaporator, the heat exchange between air and the refrigerant is most efficiently performed by the louver 14 of the corrugated fin 10. Therefore, a large amount of condensed water in which the moisture contained in the air is condensed is generated on the surface of the louver 14. As shown by the arrow WF1 in FIG. 10, the condensed water flows to the bent portion 12 through the groove portion 11 forming the first groove portion group 110 and the groove portion 11 forming the second groove portion group 120. Then, as shown by the arrow WF2 in FIG. 11, it flows down along the hole of the louver 14 formed in the fin main body 13 and the wall of the tube 20. Therefore, the heat exchanger 1 can prevent the condensed water from staying in the louver 14 or the like of the corrugated fin 10.

In FIG. 6, the first groove group 110 and the second groove group 120 provided on the first surface 10a of the corrugated fin 10 are shown by solid lines, and the first groove group 110 and the second groove group 120 provided on the second surface 10b are shown by solid lines. 120 is shown by a broken line. The first groove group 110 and the second groove group 120 provided on the first surface 10a and the first groove group 110 and the second groove group 120 provided on the second surface 10b are provided at positions shifted from each other. ing.

The cross section of the VII-VII line of FIG. 6 is shown in FIG. 7, the cross section of the VIII-VIII line of FIG. 6 is shown in FIG. 8, and the cross section of the IX-IX line of FIG. 6 is shown in FIG. In FIGS. 7 and 9, the groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b are located at different positions. In FIG. 8, the groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b are at the same position. However, in FIG. 8, the groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b merely overlap at a point, and the overlapping portion is the bent portion 12. Does not extend continuously in the direction of extension. Therefore, the corrugated fin 10 of the present embodiment has high rigidity with respect to the direction in which the bent portion 12 extends.

Here, regarding the corrugated fin 10, the groove portion 11 is not provided, the groove portion 11 is provided along the direction in which the bent portion 12 extends, and the groove portion 11 is obliquely provided in the direction in which the bent portion 12 extends. The analysis results comparing the strengths of the provided ones will be described.

In the following description, the direction perpendicular to the direction in which the bent portion 12 extends is referred to as a longitudinal direction.

FIG. 12 is a perspective view of the corrugated fin 10 having no groove 11.

FIG. 13 is a perspective view of the corrugated fin 10 in which the groove portion 11 is provided along the direction in which the bent portion 12 extends, as in the reference example described later. 14 (A), (B), and (C) are cross-sectional views of the XIVA-XIVA line, the XIVB-XIVB line, and the XIVC-XIVC line of FIG. 13, respectively. As shown by the alternate long and short dash lines (A), (B), and (C) in FIG. 14, when the groove portion 11 is provided along the direction in which the bent portion 12 extends, the groove portion 11 is in the direction in which the bent portion 12 extends. It will be in the same position. In FIG. 14, when a bending force, a pulling force, a compressive force, or the like is applied to the corrugated fin 10, the portion where the stress is concentrated is hatched with a broken line. In this case, the locations where the stress is concentrated are aligned in the extending direction of the bent portions 12 corresponding to the positions where the groove portions 11 are provided.

The bending force is a force acting on the plate-shaped member 100 when the bent portion 12 is formed on the plate-shaped member 100 constituting the corrugated fin 10. The tensile force is a force acting on the plate-shaped member 100 when the plate-shaped member 100 is pulled in the longitudinal direction. The compressive force is a force acting on the plate-shaped member 100 when the corrugated fin 10 is compressed in the direction perpendicular to the bent portion 12.

FIG. 15 is a perspective view of a corrugated fin 10 in which the groove portion 11 is provided obliquely with respect to the direction in which the bent portion 12 extends as in the present embodiment. 16A, 16B, and 16C are cross-sectional views of the XVIA-XVIA line, the XVIB-XVIB line, and the XVIC-XVIC line of FIG. 15, respectively. As shown in (A), (B), and (C) of FIG. 16, when the groove portion 11 is provided diagonally with respect to the direction in which the bent portion 12 extends, the groove portion 11 is arranged in the direction in which the bent portion 12 extends. It is formed so as to face each other and gradually shift in the longitudinal direction. Also in FIG. 16, the corrugated fins 10 are hatched with broken lines at places where stress is concentrated when bending force, tensile force, compressive force, or the like is applied. In this case, the portion where the stress is concentrated is a position corresponding to each groove portion 11 so as to extend in the direction in which the bent portion 12 extends and gradually deviate in the longitudinal direction.

FIG. 17 shows the analysis results when bending force, tensile force, compressive force and the like are applied to each of the corrugated fins 10 described with reference to FIGS. 12 to 16.

As shown in the diamond-shaped plot and the solid line σ1 in FIG. 17, the corrugated fins 10 having no groove 11 have substantially uniform stress generated in the corrugated fins 10 at each position in the longitudinal direction.

As shown in the quadrangular plot of FIG. 17 and the solid line σ2, the corrugated fin 10 provided with the groove portion 11 along the direction in which the bent portion 12 extends has a large stress generated at a predetermined position in the longitudinal direction. The position corresponds to the position where the groove 11 is provided in the corrugated fin 10.

On the other hand, as shown in the triangular plot of FIG. 17 and the solid line σ3, the corrugated fin 10 provided with the groove 11 diagonally with respect to the direction in which the bent portion 12 extends is formed on the corrugated fin 10 at each position in the longitudinal direction. The generated stress is almost uniform. As shown in (A), (B), and (C) of FIG. 16, the corrugated fin 10 has a configuration in which the groove portion 11 is gradually displaced in the longitudinal direction in the direction in which the bent portion 12 extends. It has become. That is, when a bending force, a tensile force, a compressive force, or the like is applied to the corrugated fin 10, the stress is dispersed in the longitudinal direction, so that the stress generated in the corrugated fin 10 becomes substantially uniform at each position in the longitudinal direction. .. Therefore, it can be said that the corrugated fin 10 has high rigidity against bending force, tensile force, compressive force and the like.

Subsequently, an example of the molding method of the corrugated fin 10 of the present embodiment will be described.

FIG. 18 is an example of a molding apparatus 30 for molding the corrugated fin 10 of the present embodiment. The molding device 30 includes a first tension device 31, a groove forming roller device 32, a second tension device 33, a forming roller device 34, a cutting device 35, a feeding device 36, a straightening device 37, a braking device 38, and the like. There is.

In the following description, the plate-shaped member 100 in a state before the corrugated fin 10 is formed is referred to as a work W.

In the molding step of the corrugated fin 10, the work W is taken out from the material roll 39. The first tension device 31 applies a predetermined tension to the work W. As a result, the work W is extended to a flat state.

Next, the work W is passed through the grooving roller 321 included in the grooving roller device 32. The groove forming roller 321 is provided with respect to both sides of one surface 10a (that is, the first surface 10a) of the work W in the plate thickness direction and the other surface 10b (that is, the second surface 10b) of the work W in the plate thickness direction. A plurality of groove portions 11 are formed. Subsequently, the second tension device 33 applies a predetermined tension to the work W to extend the work W to a flat state.

Next, the work W is passed through the gear-shaped forming roller 341 of the forming roller device 34. The forming roller 341 bends the work W into a corrugated iron shape. As a result, as shown in FIG. 19, the work W is formed into a corrugated plate shape and has a shape close to that of the corrugated fin 10. The tooth surface of the forming roller 341 is provided with a cutting edge (not shown) for forming the louver 14. Therefore, when the work W passes through the forming roller device 34, the louver 14 is formed on the work W.

Subsequently, the work W is cut to a predetermined length by the cutting device 35, and then fed to the straightening device 37 by the feeding device 36. The straightening device 37 presses the bent portion 12 formed on the work W from the vertical direction, and uniformly corrects the distance between the bent portion 12 of the work W and the bent portion 12, that is, the mountain height of the corrugated fin 10. ..

Next, the work W is sent to the brake device 38. The brake device 38 comes into contact with the plurality of bent portions 12 of the work W and generates a frictional force that hinders the progress of the work W. As a result, the work W is compressed by the feeding force generated by the feeding device 36 and the frictional force generated by the braking device 38 so that the bent portions 12 adjacent to each other in the traveling direction come into contact with each other. After passing through the brake device 38, the compressed work W is stretched by its own elastic force to have a predetermined fin pitch. As a result, the corrugated fin 10 is formed.

FIG. 20 shows a part of a cross section of the corrugated fin 10 molded by the molding apparatus 30. In this state, the bent portion 12 of the corrugated fin 10 is formed into a curved surface shape substantially as intended. Thereby, it is possible to manage the mountain height M and the fin pitch of the corrugated fin 10 to a constant height.

Subsequently, as shown in FIG. 21, the plurality of corrugated fins 10 are respectively arranged in the gaps between the tubes 20. Then, the corrugated fin 10 is pressed by the outer frame member 25 from the direction perpendicular to the bent portion 12. As a result, all the corrugated fins 10 and the tube 20 come into contact with each other. Subsequently, after the members such as the first to fourth header tanks 21 to 24 are assembled, the members are joined by brazing.

Here, the corrugated fin of the reference example will be described for comparison with the corrugated fin of the first embodiment described above. It should be noted that this reference example was devised by the inventors and is not a conventional technique.

FIG. 33 shows a partially enlarged view of the corrugated fin 10 as a reference example. The corrugated fin 10 of the reference example also has a plurality of bent portions 12 in which the plate-shaped member 100 is bent at predetermined intervals, and a fin main body portion 13 arranged between the bent portions 12 and the bent portions 12. is doing. The fin main body 13 is provided with a louver 14 in which a part of the plate-shaped member 100 is cut and raised.

A plurality of groove portions 11 are provided on the surface of the corrugated fin 10. The plurality of groove portions 11 are provided so that the groove portions 11 are lined up at predetermined intervals. As a result, the hydrophilicity of the surface of the corrugated fin 10 becomes high, and the drainage property is improved. Therefore, it is possible to prevent the condensed water from staying on the surface of the corrugated fin 10.

In FIG. 33, the direction in which the bent portion 12 extends is indicated by the alternate long and short dash line 12a. The plurality of groove portions 11 shown in the reference example include one provided along the direction in which the bent portion 12 extends and one provided in a direction orthogonal to the extending direction of the bent portion 12. I'm out. In the corrugated fin 10 of the reference example, a part of the plurality of groove portions 11 is provided along the direction in which the bent portion 12 extends, so that the groove portion 11 reduces the plate thickness of the plate-shaped member 100. The bent portion 12 is continuous in the extending direction of the bent portion 12.

FIG. 34 (A) is a plan view of the plate-shaped member 100 in a state before the bent portion 12 is formed on the corrugated fin 10. FIG. 34 (B) is a cross-sectional view showing a state in the middle of forming the bent portion 12 on the corrugated fin 10 by bending the plate-shaped member 100 at the portion of the alternate long and short dash line 12a of FIG. 34 (A). .. As shown in FIGS. 34 (A) and 34 (B), when the corrugated fin 10 is formed, the plate-shaped member 100 is bent to form the bent portion 12, and then the angle of the bent portion 12 is changed to change the angle of the bent portion 12 to form the fin main body. There is a step of adjusting the distance between the portions 13. At that time, if the groove 11 is continuously provided along the direction in which the bent portion 12 of the corrugated fin 10 extends, the corrugated fin 10 is provided with the bent portion 12 as shown by the broken line X in FIG. 35. There is a problem that the curved surface of the bent portion 12 becomes an intermittent shape due to buckling.

Further, as shown by arrows P1 and P2 in FIG. 36, when the corrugated fins 10 are formed and when the heat exchanger is manufactured, the corrugated fins 10 are compressed in the direction perpendicular to the bent portion 12 in order to make the mountain heights uniform. There is a process and a process of stacking fins and tubes and compressing them in the stacking direction. At that time, if the groove portion 11 is continuously provided along the direction in which the bent portion 12 of the corrugated fin 10 extends, the corrugated fin 10 is the fin main body portion 13 as shown by the broken line Y in FIG. 37. There is a problem of buckling. In that case, the mountain height and fin pitch of the corrugated fins 10 cannot be controlled, and it becomes difficult to manufacture the heat exchanger 1 by arranging a plurality of corrugated fins 10 in the gaps between the tubes 20.

On the other hand, the corrugated fin 10 of the first embodiment described above has a second plate thickness portion T2 that is thicker than the first plate thickness portion T1 in a cross-sectional view parallel to the direction in which the bent portion 12 extends. Is arranged intermittently so that the fins in the direction in which the bent portion 12 extends have high rigidity. Therefore, in the first embodiment, even if a bending force, a pulling force, a compressive force, or the like acts during molding of the corrugated fin 10, buckling at the bent portion 12 or the fin main body portion 13 is prevented, and the corrugated fin 10 is prevented from buckling. Is molded into a shape substantially as intended, as shown in FIG. Therefore, in the first embodiment, the mountain height and fin pitch of the corrugated fin 10 can be controlled to a constant height.

On the other hand, in the reference example, as shown in FIG. 38, the plurality of groove portions 11 constituting the first groove portion group 110 of the first surface 10a and the plurality of groove portions 11 constituting the first groove portion group 110 of the second surface 10b. However, it is provided at a position where it overlaps in the plate thickness direction, or a misalignment when viewed in the plate thickness direction is formed as a matter of course. Therefore, in the reference example, the first plate-thick portion T1 having a thin plate thickness is continuous in the direction in which the bent portion 12 extends. Therefore, in the reference example, as shown by arrows P3 and P4 in FIG. 38, when a tensile force acts on the work W in the direction perpendicular to the bent portion 12 during molding of the corrugated fin 10, the alternate long and short dash line C1 in FIG. 38 shows. As shown, there is a problem that the work W is cracked. In that case, it becomes difficult to manufacture the corrugated fin 10 and the heat exchanger 1.

On the other hand, in the first embodiment, as shown in FIGS. 6 to 9, the groove portion 11 constituting the first groove portion group 110 provided on one surface 10a of the corrugated fin 10 in the plate thickness direction and The groove portions 11 constituting the first groove portion group 110 provided on the other surface 10b are provided at positions deviated from each other in the plate thickness direction. This prevents the corrugated fin 10 from being continuous with the thin first plate-thick portion T1 in a cross-sectional view parallel to the direction in which the bent portion 12 extends. Therefore, in the corrugated fin 10, the rigidity of the fin in the direction in which the bent portion 12 extends increases. Therefore, in the first embodiment, even if a tensile force acts on the work W in the vertical direction of the bent portion 12 during molding of the corrugated fin 10, it is possible to prevent the work W from being cracked.

Further, in the first embodiment, it is possible to exert the following effects.

In the first embodiment, the plurality of groove portions 11 provided in the corrugated fin 10 extend obliquely with respect to the direction in which the bent portion 12 extends. According to this, as shown in the triangular plot of FIG. 17 and the solid line σ3, when a bending force, a tensile force, a compressive force or the like acts during the molding of the corrugated fin 10, the stress is dispersed in the longitudinal direction and the stress is dispersed in the longitudinal direction. The stress generated in the corrugated fin 10 becomes substantially uniform at each position. Therefore, the corrugated fin 10 of the first embodiment can more reliably prevent the corrugated fin 10 from buckling at the bent portion 12 and the fin main body portion 13 during its molding.

In the first embodiment, the plurality of groove portions 11 are provided on both sides of the first surface 10a and the second surface 10b of the corrugated fin 10. According to this, the drainage property of both sides of the corrugated fin 10 in the plate thickness direction can be improved.

As shown in FIG. 5, in the first embodiment, the plurality of groove portions 11 are provided symmetrically with respect to the virtual surface VS including the center of the bent portion 12 and perpendicular to the direction in which the bent portion 12 extends. Has been done. According to this, when forming a plurality of groove portions 11 on the work W by the groove forming roller 321 or the like at the time of forming the corrugated fin 10, the force acting on the work W from the groove forming roller 321 becomes equal on the left and right. Therefore, at that time, it is possible to prevent the work W from being twisted in the feed direction of the groove forming roller 321.

In the first embodiment, it is preferable to provide the angle θ1 formed by the direction in which the plurality of groove portions 11 extend and the virtual surface VS in the range of 20 ° ≦ θ1 ≦ 70 °.

According to this, when a bending force, a tensile force, a compressive force or the like acts during molding of the corrugated fin 10, the stress generated in the corrugated fin 10 is dispersed in the longitudinal direction, and the stress is applied to the corrugated fin 10 at each position in the longitudinal direction. Can be generated substantially uniformly. Therefore, it is possible to more reliably prevent the corrugated fin 10 from buckling at the bent portion 12 and the fin main body portion 13 when the corrugated fin 10 is formed.

A first groove group 110 and a second groove group 120 are provided on the surface of the corrugated fin 10 of the first embodiment. The plurality of groove portions 11 constituting the first groove portion group 110 and the plurality of groove portions 11 constituting the second groove portion group 120 extend so as to intersect each other. According to this, the groove portion 11 forming the first groove portion group 110 and the groove portion 11 forming the second groove portion group 120 are provided so as to be connected from the fin main body portion 13 to the bent portion 12. Therefore, as shown by the arrow WF1 in FIG. 10, the condensed water generated in the fin body 13 of the corrugated fin 10 easily flows to the bent portion 12 through the first groove group 110 and the second groove group 120. Then, as shown by the arrow WF2 in FIG. 11, the condensed water flowing into the bent portion 12 flows down along the hole of the louver 14 and the wall of the tube 20. Therefore, the heat exchanger 1 can prevent the condensed water from staying in the fin main body 13 of the corrugated fins 10 to prevent an increase in ventilation resistance between the corrugated fins and improve the heat exchange performance. ..

In the first embodiment, the plurality of groove portions 11 are provided at least on the surface of the louver 14. According to this, by providing a plurality of groove portions 11 in the louver 14 that exhibits the most heat exchange performance among the corrugated fins 10, the drainage property of the louver 14 is improved, and condensed water stays on the surface of the louver 14. Is prevented. Therefore, the heat exchanger 1 can prevent an increase in the ventilation resistance of the louver 14 and improve the heat exchange performance.

The heat exchanger 1 of the first embodiment is used as an evaporator. In the evaporator, condensed water is generated on the surface of the corrugated fin 10 when the air is cooled. In that case, the heat exchanger 1 can improve the heat exchange performance as an evaporator by improving the drainage property of the condensed water generated on the surface of the corrugated fin 10.

As shown in FIG. 4, in the first embodiment, the plurality of groove portions 11 preferably have a width w of 10 to 50 μm, a depth h of 10 μm or more, and a pitch p of 50 to 200 μm. According to this, in this heat exchanger 1, the hydrophilicity of the surface of the corrugated fin 10 can be enhanced by the plurality of groove portions 11, and the drainage property of the condensed water generated on the surface of the corrugated fin 10 can be improved.

(Second Embodiment)
The second embodiment will be described with reference to FIGS. 22 to 25. The second embodiment is a modification of the configuration of the groove portion 11 with respect to the first embodiment, and the other parts are the same as those of the first embodiment. Therefore, only the parts different from the first embodiment will be described.

FIG. 22 is a plan view of the first surface 10a of the plate-shaped member 100 constituting the corrugated fin 10 of the second embodiment. A first groove group 110 and a second groove group 120 are provided on the first surface 10a of the corrugated fin 10. In FIG. 22, the angles formed by the extending direction of the plurality of groove portions 11 constituting the first groove portion group 110 and the virtual surface VS are shown by θ3 and θ4. It is preferable that the plurality of groove portions 11 constituting the first groove portion group 110 of the first surface 10a are provided so as to be in the range of 20 ° ≦ θ3 ≦ 70 ° and −20 ° ≧ θ4 ≧ −70 °.

The second groove group 120 is composed of a plurality of groove 11s extending in a direction intersecting the first groove group 110. In the second embodiment, the plurality of groove portions 11 constituting the second groove portion group 120 extend in parallel with the virtual surface VS. That is, the angle formed by the plurality of groove portions 11 constituting the second groove portion group 120 and the virtual surface VS is approximately 0 °.

FIG. 23 is a plan view of the second surface 10b of the plate-shaped member 100 constituting the corrugated fin 10 of the second embodiment. A first groove group 110 and a second groove group 120 are also provided on the second surface 10b of the corrugated fin 10. In FIG. 23, the angles formed by the extending direction of the plurality of groove portions 11 constituting the first groove portion group 110 and the virtual surface VS are shown by θ5 and θ6. It is preferable that the plurality of groove portions 11 constituting the first groove portion group 110 of the second surface 10b are provided so as to be in the range of 110 ° ≦ θ5 ≦ 160 ° and −110 ° ≧ θ6 ≧ −160 °. That is, θ3 and θ5 are different angles, and θ4 and θ6 are different angles.

A plurality of groove portions 11 constituting the second groove portion group 120 provided on the second surface 10b also extend in parallel with the virtual surface VS. That is, the angle formed by the plurality of groove portions 11 constituting the second groove portion group 120 and the virtual surface VS is approximately 0 °.

In FIG. 24, the first groove group 110 and the second groove group 120 provided on the first surface 10a of the corrugated fin 10 are shown by solid lines, and the first groove group 110 and the second groove group 120 provided on the second surface 10b are shown by solid lines. 120 is shown by a broken line. As described above, θ3 and θ5 are different angles, and θ4 and θ6 are different angles. Therefore, the groove 11 forming the first groove group 110 provided on the first surface 10a of the corrugated fin 10 and the groove 11 forming the first groove group 110 provided on the second surface 10b have the same plate thickness direction. Seen from the above, the angle with respect to the direction in which the bent portion 12 extends is different. Therefore, the groove portion 11 forming the first groove portion group 110 of the first surface 10a and the groove portion 11 forming the first groove portion group 110 of the second surface 10b are provided at positions deviated from each other.

An enlarged view of the cross section of the XXV-XXV line of FIG. 24 is shown in FIG. In FIG. 25, the groove 11 forming the first groove group 110 provided on the first surface 10a and the groove 11 forming the first groove group 110 provided on the second surface 10b overlap at a point. Not too much, the overlapping portion does not extend continuously in the direction in which the bent portion 12 extends. The portion where the groove portion 11 forming the second groove portion group 120 provided on the first surface 10a and the groove portion 11 forming the second groove portion group 120 provided on the second surface 10b overlap is bent. The portion 12 extends perpendicular to the extending direction, and the bent portion 12 does not extend continuously in the extending direction.

In the second embodiment described above, the groove portion 11 constituting the first groove portion group 110 provided on the first surface 10a of the corrugated fin 10 and the first groove portion group 110 provided on the second surface 10b are configured. When viewed from the same plate thickness direction, the groove portion 11 to be formed has a different angle with respect to the direction in which the bent portion 12 extends. According to this, even when the pitches of the plurality of groove portions 11 are extremely small, it is not necessary to alternately arrange one groove in the plate thickness direction and the other groove in the plate thickness direction. Therefore, the groove 11 forming the first groove group 110 provided on the first surface 10a and the groove 11 forming the first groove group 110 provided on the second surface 10b are displaced from each other in the same plate thickness direction. It is possible to easily realize a configuration in which it is provided at a vertical position. Therefore, in a cross-sectional view parallel to the direction in which the bent portion 12 extends, it is possible to prevent continuous thin portions of the corrugated fin 10. Therefore, the corrugated fin 10 is a fin in the direction in which the bent portion 12 extends. Increases rigidity. Therefore, similarly to the first embodiment, the second embodiment also prevents the corrugated fin 10 from buckling at the bent portion 12 and the fin main body portion 13 during molding of the corrugated fin 10 or manufacturing of the heat exchanger 1. be able to. Further, when a tensile force acts on the work W in the direction perpendicular to the bent portion 12 during molding of the corrugated fin 10, it is possible to prevent the work W from being cracked. Further, the second embodiment can also exhibit the same effects as those described in the first embodiment.

(Third Embodiment)
The third embodiment will be described with reference to FIG. The third embodiment is a modification of the configuration of the groove portion 11 with respect to the first and second embodiments, and is the same as the first and second embodiments except for the first and second embodiments. Only the parts that differ from the above will be described.

FIG. 26 is a plan view of the plate-shaped member 100 constituting the corrugated fin 10 of the third embodiment. The corrugated fin 10 of the third embodiment is provided with a bent direction groove group 130 composed of a plurality of groove 11s extending along a direction in which the bent portion 12 extends. Further, the corrugated fin 10 is provided with a crossing direction groove group 140 composed of a plurality of groove portions 11 extending in a direction intersecting the bending direction groove group 130.

The plurality of groove portions 11 constituting the bending direction groove portion group 130 are not provided at one end of the corrugated fins 10 in the direction in which the bending direction 12 extends and at the other end. As a result, the corrugated fin 10 is thicker than the first plate-thick portion T1 and the first plate-thick portion T1 in which the groove portion 11 is provided in a cross-sectional view parallel to the direction in which the bent portion 12 extends. It is configured to include a second plate thickness portion T2. The second plate thickness portion T2 is arranged at one end in the direction in which the bent portion 12 extends and at the other end. As a result, the corrugated fin 10 of the third embodiment also has high rigidity of the fin in the direction in which the bent portion 12 extends. Therefore, the third embodiment can also exhibit the same effects as those of the first and second embodiments.

(Fourth Embodiment)
The fourth embodiment will be described with reference to FIGS. 27 to 30. The fourth embodiment is a modification of the configuration of the groove portion 11 with respect to the first to third embodiments, and the other parts are the same as those of the first to third embodiments. Only the parts that differ from the above will be described.

FIG. 27 is a plan view of the plate-shaped member 100 constituting the corrugated fin 10 of the fourth embodiment. The corrugated fin 10 of the fourth embodiment is also provided with a bent direction groove group 130 composed of a plurality of groove 11s extending along a direction in which the bent portion 12 extends. Further, the corrugated fin 10 is provided with a crossing direction groove group 140 composed of a plurality of groove portions 11 extending in a direction intersecting the bending direction groove group 130.

The plurality of groove portions 11 constituting the bending direction groove portion group 130 of the fourth embodiment are provided in a staggered manner. That is, the plurality of groove portions 11 constituting the bending direction groove portion group 130 are provided so as to intermittently extend along the direction in which the bending portion 12 extends. As a result, the corrugated fin 10 is thicker than the first plate-thick portion T1 and the first plate-thick portion T1 in which the groove portion 11 is provided in a cross-sectional view parallel to the direction in which the bent portion 12 extends. It is possible to arrange the second plate thickness portion T2. Therefore, the corrugated fin 10 of the fourth embodiment also has high rigidity of the fin in the direction in which the bent portion 12 extends.

Further, also in the fourth embodiment, the plurality of groove portions 11 are provided on both sides of the first surface 10a and the second surface 10b of the corrugated fin 10. FIG. 27 shows a bending direction groove group 130 and a crossing direction groove group 140 provided on the first surface 10a of the corrugated fin 10. FIG. 28 shows a bending direction groove group 130 and a crossing direction groove group 140 provided on the second surface 10b of the corrugated fin 10.

In FIG. 29, the bending direction groove group 130 and the crossing direction groove group 140 provided on the first surface 10a of the corrugated fin 10 are shown by solid lines, and the bending direction groove group 130 provided on the second surface 10b and the crossing direction are shown. The groove group 140 is shown by a broken line. The groove 11 forming the bending direction groove group 130 and the crossing direction groove group 140 provided on the first surface 10a of the corrugated fin 10, and the bending direction groove group 130 and the crossing direction groove group 140 provided on the second surface 10b The groove portions 11 to be formed are provided at positions deviated from each other when viewed in the plate thickness direction. As a result, the plurality of groove portions 11 provided on the first surface 10a and the plurality of groove portions 11 provided on the second surface 10b overlap at points, and the overlapping portions are in the direction in which the bent portion 12 extends. It does not extend continuously. Therefore, in the corrugated fin 10, the rigidity of the fin in the direction in which the bent portion 12 extends increases. Therefore, it is possible to prevent the corrugated fin 10 from buckling at the bent portion 12 and the fin main body portion 13 when the corrugated fin 10 is formed or when the heat exchanger 1 is manufactured. Further, when a tensile force acts on the work W in the vertical direction of the bent portion 12 during molding of the corrugated fin 10, it is possible to prevent the plate-shaped member 100 from being cracked.

An enlarged view of a cross section of the XXXX-XXX line of FIG. 29 is shown in FIG. With reference to FIG. 30, the amount of deviation between the groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b will be described. The groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b are arranged so as to satisfy the following equation 1.
h (2t-3h) ≤ δ ² ... (Equation 1)
In Equation 1, h is the depth of the groove 11. t is the plate thickness of the corrugated fin 10, that is, the distance between the first surface 10a and the second surface 10b. δ is the distance between the groove portion 11 of the first surface 10a and the groove portion 11 of the second surface 10b in the plane direction of the corrugated fin 10.

In the following description, the distance between the bottom of the groove 11 on the first surface 10a and the bottom of the groove 11 on the second surface 10b is referred to as the distance Lmin between the grooves. The distance between the bottom of the groove 11 of the first surface 10a and the second surface 10b is referred to as the groove plate thickness distance Tmin.

In the fourth embodiment, by satisfying the above equation 1, the groove-to-groove distance Lmin can be made the same as the groove plate thickness distance Tmin, or the groove-to-groove distance Lmin can be made larger than the groove plate thickness distance Tmin. be. That is, the amount of deviation between the groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b can be made larger than the groove plate thickness distance Tmin. As a result, the groove plate thickness distance Tmin becomes the strength rate-determining factor, and it is possible to prevent the strength from being lowered due to the groove portion 11 provided on the first surface 10a and the groove portion 11 provided on the second surface 10b approaching each other. Therefore, the fourth embodiment can also exhibit the same effects as those of the first to third embodiments.

(Fifth Embodiment)
A fifth embodiment will be described with reference to FIG. The fifth embodiment is a modification of the configuration of the corrugated fin 10 with respect to the fourth embodiment, and the other parts are the same as those of the fourth embodiment. Therefore, only the parts different from the fourth embodiment will be described.

FIG. 31 is a plan view of the plate-shaped member 100 constituting the corrugated fin 10 of the fifth embodiment. The corrugated fin 10 of the fifth embodiment is provided with a slit 15. The shape and number of the slits 15 can be arbitrarily set, and are not limited to those shown in the figure. The corrugated fin 10 of the fifth embodiment is also provided with the bending direction groove group 130 and the crossing direction groove group 140. The plurality of groove portions 11 constituting the bending direction groove portion group 130 of the fifth embodiment are provided so as to intermittently extend along the direction in which the bending portion 12 extends. Therefore, the fifth embodiment can also exhibit the same effects as those of the first to fourth embodiments.

(Sixth Embodiment)
A sixth embodiment will be described with reference to FIG. The sixth embodiment is a modification of the configuration of the groove portion 11 with respect to the third to fifth embodiments, and the other parts are the same as those of the third to fifth embodiments. Only the parts that differ from the above will be described.

FIG. 32 is a plan view of the plate-shaped member 100 constituting the corrugated fin 10 of the sixth embodiment. On the surface of the corrugated fin 10 of the sixth embodiment, a crossing direction groove group 140 composed of a plurality of groove portions 11 extending in a direction intersecting the extending direction of the bent portion 12 is provided, and the third to third. The bending direction groove group 130 described in the fifth embodiment is not provided. As a result, the corrugated fin 10 is thicker than the first plate-thick portion T1 in which the groove portion 11 is provided and the first plate-thick portion T1 in a cross-sectional view parallel to the direction in which the bent portion 12 extends. It is possible to arrange a thick second plate thickness portion T2. Therefore, the corrugated fin 10 of the sixth embodiment also has high rigidity of the fin in the direction in which the bent portion 12 extends. Therefore, the sixth embodiment can also exhibit the same effects as those of the first to fifth embodiments. Further, in the sixth embodiment, the configuration of the groove portion 11 can be simplified.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims. Further, the above-described embodiments are not unrelated to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential except when it is clearly stated that they are essential and when they are clearly considered to be essential in principle. stomach. Further, in each of the above-described embodiments, when numerical values such as the number, numerical values, quantities, and ranges of the constituent elements of the embodiments are mentioned, when it is clearly stated that they are particularly essential, and in principle, the number is clearly limited to a specific number. It is not limited to the specific number except when it is done. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of a component or the like, the shape, unless otherwise specified or limited in principle to a specific shape, positional relationship, etc. It is not limited to the positional relationship.

(1) In each of the above embodiments, the heat exchanger 1 has been described as being used as an evaporator, but the present invention is not limited to this. The heat exchanger 1 can be used for various purposes such as, for example, a condenser or an intermediate heat exchanger 1.

(2) In each of the above embodiments, the corrugated fin 10 has been described as an outer fin provided on the outside of the tube 20, but the present invention is not limited to this. The corrugated fin 10 can also be used as an inner fin, for example.

(summary)
According to the first aspect shown in part or all of the above embodiments, the heat exchanger that exchanges heat between fluids includes tubes, corrugated fins, and a plurality of grooves. A first fluid flows through the tube. The corrugated fin has a plurality of bent portions in which plate-shaped members are bent at predetermined intervals, and a fin main body portion arranged between the bent portions, and the first corrugated fin flows inside the tube. Increases the efficiency of heat exchange between the fluid in the water and the second fluid flowing outside the tube. The plurality of grooves are provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are arranged at predetermined intervals. The corrugated fin has a first plate thickness portion provided with a groove portion and a second plate thickness portion thicker than the first plate thickness portion in a cross-sectional view parallel to the direction in which the bent portion extends. Is configured to include.

According to the second aspect, the plurality of grooves extend intermittently along the direction in which the bent portion extends.

According to this, it is possible to arrange the second plate thickness portion which is thicker than the first plate thickness portion in the direction in which the bent portion of the corrugated fin extends.

According to the third aspect, the plurality of grooves are provided on one surface of the corrugated fin in the plate thickness direction and on the other surface of the corrugated fin in the plate thickness direction.

According to this, it is possible to improve the drainage property on both sides of the corrugated fin in the plate thickness direction.

According to the fourth aspect, a plurality of groove portions intermittently extending along the direction in which the bent portion extends are referred to as a bent direction groove portion group. In addition to the bending direction groove group, a plurality of groove portions are lined up on the surface of the corrugated fin at a predetermined interval, and the crossing direction groove portion group extending in a direction intersecting with the bending direction groove group. Is further provided.

According to this, the bending direction groove group and the crossing direction groove group are provided so as to connect the bending direction groove portion group and the crossing direction groove portion group from the fin main body portion to the bending portion. Therefore, the condensed water generated in the fin main body of the corrugated fin easily flows to the bent portion through the bent direction groove portion group and the intersecting direction groove portion group. The condensed water that has flowed to the bent part flows down along the wall of the tube. Therefore, since this heat exchanger prevents the condensed water from staying in the fin main body of the corrugated fin, it is possible to prevent an increase in ventilation resistance due to the retention of the condensed water and improve the heat exchange performance.

According to the fifth aspect, the groove forming the bending direction groove group provided on one surface of the corrugated fin in the plate thickness direction and the folding provided on the other surface of the corrugated fin in the plate thickness direction. The groove portions forming the bending direction groove portion group are provided at positions deviated from each other in the plate thickness direction.

According to this, in a cross-sectional view parallel to the direction in which the bent portion extends, it is possible to prevent continuous portions of the corrugated fins having a thin plate thickness. Therefore, the corrugated fin has high rigidity in the direction in which the bent portion extends. Therefore, for example, when a tensile force acts on the work in the direction perpendicular to the bent portion during molding of the corrugated fin, it is possible to prevent the work from being cracked. It also prevents the corrugated fins from buckling at the bends and fin bodies, for example when molding corrugated fins or manufacturing heat exchangers.

According to the sixth aspect, the bottom of the groove forming the bending direction groove group provided on one surface of the corrugated fin in the plate thickness direction and the other surface of the corrugated fin in the plate thickness direction are provided. The distance from the bottom of the grooves forming the bending direction groove group is defined as the distance between the grooves. The distance between the bottom of the groove forming the bending direction groove group provided on one surface of the corrugated fin in the plate thickness direction and the other surface in the plate thickness direction of the corrugated fin is defined as the groove plate thickness distance. At this time, the distance between the grooves is the same as the groove plate thickness distance or larger than the groove plate thickness distance.

According to this, the groove portion forming the bending direction groove portion group provided on one surface in the plate thickness direction of the corrugated fin and the groove portion forming the bending direction groove portion group provided on the other surface It is possible to increase the amount of deviation. As a result, the thickness distance of the groove portion becomes the strength rate-determining factor, and it is possible to prevent the strength from being lowered due to the groove portion provided on the first surface and the groove portion provided on the second surface approaching each other.

According to the seventh aspect, the plurality of grooves forming the bending direction groove group are arranged in a staggered manner on the surface of the corrugated fin.

According to this, the plurality of groove portions forming the bent direction groove portion group are configured to be intermittently extended along the direction in which the bent portion extends. Therefore, in a cross-sectional view parallel to the direction in which the bent portion of the corrugated fin extends, the first plate thickness portion provided with the groove portion and the second plate thickness portion thicker than the first plate thickness portion. Can be placed.

According to the eighth aspect, the plurality of grooves extend obliquely with respect to the direction in which the bent portion extends.

According to this, when the plate-shaped member is bent to form a bent portion, or when a compressive force is applied to the corrugated fin forming the bent portion from the vertical direction of the bent portion, the corrugated fin is folded. Stress is generated almost uniformly in the direction orthogonal to the direction in which the curved portion extends. Therefore, it is possible to more reliably prevent the corrugated fin from buckling at the bent portion and the fin main body portion during molding of the corrugated fin.

According to a ninth aspect, the heat exchanger that exchanges heat between fluids includes a tube, corrugated fins, and a plurality of grooves. A first fluid flows through the tube. The corrugated fin has a plurality of bent portions in which plate-shaped members are bent at predetermined intervals, and a fin main body portion arranged between the bent portions, and the first corrugated fin flows inside the tube. Increases the efficiency of heat exchange between the fluid in the water and the second fluid flowing outside the tube. The plurality of grooves are provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are lined up at predetermined intervals and extend diagonally with respect to the extending direction of the bent portion. ..

According to this, the ninth viewpoint can exert the same action and effect as the first viewpoint. Further, from the ninth viewpoint, when the plate-shaped member is bent to form a bent portion, or when a compressive force is applied to the corrugated fin forming the bent portion from the vertical direction of the bent portion, the corrugated fin is provided with a compressive force. Stress is generated almost uniformly in the direction orthogonal to the direction in which the bent portion extends. Therefore, the corrugated fin has high rigidity in the direction in which the bent portion extends. Therefore, it is possible to more reliably prevent the corrugated fin from buckling at the bent portion and the fin main body portion when the corrugated fin is formed.

According to the tenth aspect, the plurality of grooves are provided on one surface of the corrugated fin in the plate thickness direction and on the other surface of the corrugated fin in the plate thickness direction.

According to this, it is possible to improve the drainage property on both sides of the corrugated fin in the plate thickness direction.

According to the eleventh viewpoint, the plurality of grooves are provided symmetrically with respect to the virtual surface including the center of the bent portion and perpendicular to the direction in which the bent portion extends.

According to this, for example, when forming a plurality of groove portions on the work by a grooving roller or the like at the time of forming a corrugated fin, the force acting on the work from the grooving roller becomes equal on the left and right. Therefore, at that time, it is possible to prevent the work from being twisted in the feeding direction of the grooving roller.

According to the twelfth viewpoint, if the angle formed by the direction in which the plurality of grooves extend and the virtual surface is θ1, then 20 ° ≦ θ1 ≦ 70 °.

According to this, the direction in which the bent portion extends, such as when the plate-shaped member is bent to form a bent portion, or when a compressive force is applied to the corrugated fin forming the bent portion from the vertical direction of the bent portion. It is possible to generate stress in the corrugated fins almost uniformly in the direction orthogonal to the corrugated fin. Therefore, it is possible to more reliably prevent the corrugated fin from buckling at the bent portion and the fin main body portion during molding of the corrugated fin.

According to the thirteenth viewpoint, a plurality of grooves are referred to as a first groove group. In addition to the first groove group, a plurality of grooves are lined up on the surface of the corrugated fin at predetermined intervals, and a second groove group extending in a direction intersecting the first groove group is further formed. It is provided.

According to this, the first groove portion group and the second groove portion group are provided so as to connect the first groove portion group and the second groove portion group from the fin main body portion to the bent portion. Therefore, the condensed water generated in the fin main body portion of the corrugated fin easily flows to the bent portion through the first groove portion group and the second groove portion group. The condensed water that has flowed to the bent part flows down along the wall of the tube. Therefore, since this heat exchanger prevents the condensed water from staying in the fin main body of the corrugated fin, it is possible to prevent an increase in ventilation resistance due to the retention of the condensed water and improve the heat exchange performance.

According to the fourteenth viewpoint, the groove portion forming the first groove group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion provided on the other surface of the corrugated fin in the plate thickness direction. The groove portions forming the groove portion group are provided at positions deviated from each other in the plate thickness direction.

According to this, in a cross-sectional view parallel to the direction in which the bent portion extends, it is possible to prevent continuous portions of the corrugated fins having a thin plate thickness. Therefore, the corrugated fin has high rigidity in the direction in which the bent portion extends. Therefore, for example, when a tensile force acts on the work in the direction perpendicular to the bent portion during molding of the corrugated fin, it is possible to prevent the work from being cracked. Further, for example, when molding a corrugated fin or manufacturing a heat exchanger, it is possible to prevent the corrugated fin from buckling at the bent portion and the fin main body portion.

According to the fifteenth viewpoint, the groove portion forming the first groove group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion provided on the other surface of the corrugated fin in the plate thickness direction. The angle of the bent portion with respect to the extending direction is different from that of the groove portion forming the groove group when viewed from the same plate thickness direction.

According to this, the groove portion forming the first groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the groove portion forming the first groove portion group provided on the other surface of the corrugated fin in the plate thickness direction. Can be easily realized at a position deviated from each other in the plate thickness direction.

According to the sixteenth aspect, the corrugated fin has a louver in which a part of the fin main body is cut up. The plurality of grooves are provided at least on the surface of the louver.

According to this, by providing a plurality of grooves in the louver that exhibits the most heat exchange performance among the corrugated fins, the drainage property of the louver is improved and condensed water is prevented from staying on the surface of the louver. Therefore, this heat exchanger can prevent an increase in ventilation resistance in the louver and improve the heat exchange performance.

According to the seventeenth aspect, the heat exchanger is the air as the second fluid passing through the corrugated fins provided on the outside of the tube due to the latent heat of evaporation of the refrigerant as the first fluid flowing inside the tube. It is used as an evaporator to cool the air.

According to this, when the heat exchanger is used as an evaporator, condensed water is generated on the surface of the corrugated fin when the air is cooled. In that case, the heat exchanger can improve the heat exchange performance as an evaporator by improving the drainage property of the condensed water generated on the surface of the corrugated fin.

According to the eighteenth aspect, the plurality of grooves have a width of 10 to 50 μm, a depth of 10 μm or more, and a pitch of 50 to 200 μm.

According to this, it is possible to increase the hydrophilicity of the surface of the corrugated fin and improve the drainage property of the condensed water generated on the surface of the corrugated fin by the plurality of grooves.

According to the nineteenth aspect, the corrugated fin formed by bending the plate-shaped members at predetermined intervals includes a bent portion, a fin main body portion, and a plurality of groove portions. The bent portion is a portion where the plate-shaped member is bent at a predetermined interval. The fin main body is a portion arranged between the bent portion. The plurality of grooves are provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are arranged at predetermined intervals. The bent portion and the fin main body portion have a first plate thickness portion in which the groove portion is provided and a second plate thickness portion thicker than the first plate thickness portion in a cross-sectional view parallel to the direction in which the bent portion extends. It is configured to include a plate thickness portion.

According to this, the plurality of grooves increase the hydrophilicity of the surface of the corrugated fin. Therefore, the drainage property of the corrugated fin can be improved, and the condensed water can be prevented from staying on the surface of the corrugated fin.

Further, the corrugated fin is rigid in the direction in which the bent portion is extended by intermittently arranging the second plate thick portion thicker than the first plate thickness portion in the direction in which the bent portion is extended. Will be higher. Therefore, for example, when the plate-shaped member is bent to form a bent portion at the time of molding the corrugated fin, it is possible to prevent the corrugated fin from buckling at the bent portion. Further, for example, when molding a corrugated fin or manufacturing a heat exchanger, when a compressive force is applied from a direction perpendicular to the bent portion, the corrugated fin can be prevented from buckling at the fin main body portion.

1 heat exchanger
10 corrugated fins
11 Groove
12 Folded part
13 Fin body
20 tubes
100 plate-shaped member
T1 1st plate thickness part
T2 second plate thickness part

Claims (19)

A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which the plate-shaped member (100) is bent at predetermined intervals, a fin main body portion (13) arranged between the bent portion and the bent portion, and the fin main body. A corrugated fin (10) that has a louver (14) in which a part of the portion is cut and raised, and enhances heat exchange efficiency between a first fluid flowing inside the tube and a second fluid flowing outside the tube. )When,
A plurality of groove portions (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, the groove portions are provided with a plurality of groove portions arranged at predetermined intervals.
The corrugated fin has a first plate thickness portion (T1, T3, T4) provided with the groove portion and a plate thickness larger than that of the first plate thickness portion in a cross-sectional view in the direction in which the bent portion extends. It is composed of a thick second plate thickness portion (T2).
The plurality of grooves have a width (w) of 10 to 50 μm, a depth (h) of the grooves of 10 μm or more, and a pitch (p) of the plurality of grooves of 50 to 200 μm. It enhances the hydrophilicity of the surface of corrugated fins.
A heat exchanger in which the plurality of grooves are provided including the bent portion and the louver to promote drainage from the fin main body portion to the bent portion or the surface of the tube. The heat exchanger according to claim 1, wherein the plurality of grooves are intermittently extended along a direction in which the bent portion extends. The heat exchanger according to claim 1 or 2, wherein the plurality of grooves are provided on one surface (10a) of the corrugated fin in the plate thickness direction and the other surface (10b) of the corrugated fin. Assuming that the plurality of the groove portions intermittently extending along the extending direction of the bent portion are defined as the bent direction groove portion group (130),
On the surface of the corrugated fin, a plurality of the groove portions are lined up at a predetermined interval, and an intersecting direction groove portion group (140) extending in a direction intersecting the bending direction groove portion group is further provided. The heat exchanger according to any one of claims 1 to 3. The groove portion forming the bending direction groove group provided on one surface of the corrugated fin in the plate thickness direction and the bending direction groove portion provided on the other surface of the corrugated fin in the plate thickness direction. The heat exchanger according to claim 4, wherein the groove portion constituting the group is provided at a position deviated from the groove portion in the plate thickness direction. The bent bottom provided on one surface of the corrugated fin in the plate thickness direction and the bent portion formed on the bending direction groove group, and the bent portion provided on the other surface of the corrugated fin in the plate thickness direction. The distance from the bottom of the groove that constitutes the directional groove group is defined as the distance between the grooves (Lmin).
The groove plate thickness distance is the distance between the bottom of the groove portion forming the bending direction groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the other surface in the plate thickness direction of the corrugated fin. If (Tmin),
The heat exchanger according to claim 4 or 5, wherein the groove-to-groove distance is the same as the groove plate thickness distance or larger than the groove plate thickness distance. The heat exchanger according to any one of claims 4 to 6, wherein the plurality of grooves forming the bending direction groove group are arranged in a staggered manner on the surface of the corrugated fin. The heat exchanger according to claim 1, wherein the plurality of the groove portions extend obliquely with respect to the extending direction of the bent portion. A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portion and the bent portion, and one of the fin main bodies. A corrugated fin (10) having a louver (14) whose portion is cut up and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are lined up at predetermined intervals and are arranged at a predetermined interval.
A plurality of grooves extending diagonally with respect to the extending direction of the bent portion are provided.
The plurality of grooves have a width (w) of 10 to 50 μm, a depth (h) of the grooves of 10 μm or more, and a pitch (p) of the plurality of grooves of 50 to 200 μm. It enhances the hydrophilicity of the surface of corrugated fins.
A heat exchanger in which the plurality of grooves are provided including the bent portion and the louver to promote drainage from the fin main body portion to the bent portion or the surface of the tube. The heat exchange according to claim 9, wherein the plurality of grooves are provided on one surface (10a) of the corrugated fin in the plate thickness direction and the other surface (10b) of the corrugated fin in the plate thickness direction. vessel. 9. Heat exchanger. Assuming that the angle formed by the virtual surface (VS) including the center of the bent portion and perpendicular to the extending direction of the bent portion and the direction in which the plurality of grooves extend is θ1, 20 ° ≤ θ1 ≤ 70 °. The heat exchanger according to any one of claims 9 to 11. Assuming that the plurality of the groove portions are the first groove portion group (110),
On the surface of the corrugated fin, a plurality of the groove portions are arranged at a predetermined interval, and a second groove portion group (120) extending in a direction intersecting the first groove portion group is further provided. The heat exchanger according to any one of claims 9 to 12. The groove portion forming the first groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion group provided on the other surface of the corrugated fin in the plate thickness direction. The heat exchanger according to claim 13, wherein the groove portion is provided at a position deviated from the groove portion in the plate thickness direction. The groove portion forming the first groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion group provided on the other surface of the corrugated fin in the plate thickness direction. The heat exchanger according to claim 13 or 14, wherein the groove portion constitutes a different angle with respect to a direction in which the bent portion extends when viewed from the same plate thickness direction. The heat exchanger cools air as a second fluid passing through the corrugated fins provided on the outside of the tube by latent heat of evaporation of the refrigerant as the first fluid flowing inside the tube. The heat exchanger according to any one of claims 1 to 15, which is used as a container. A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portion and the bent portion, and one of the fin main bodies. A corrugated fin (10) having a louver (14) whose portion is cut up and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are lined up at predetermined intervals and are arranged at a predetermined interval.
A plurality of grooves extending diagonally with respect to the extending direction of the bent portion are provided.
The plurality of grooves are provided including the bent portion and the louver, and promote drainage from the fin main body portion to the bent portion or the surface of the tube.
A plurality of the groove portions are provided symmetrically with respect to a virtual surface (VS) including the center of the bent portion and perpendicular to the direction in which the bent portion extends.
Assuming that the plurality of the groove portions are the first groove portion group (110),
On the surface of the corrugated fin, a plurality of the groove portions are arranged at a predetermined interval, and a second groove portion group (120) extending in a direction intersecting the first groove portion group is further provided. Ori,
The groove portion forming the first groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion group provided on the other surface of the corrugated fin in the plate thickness direction. A heat exchanger provided at a position deviated from the groove portion to be formed in the plate thickness direction. A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portion and the bent portion, and one of the fin main bodies. A corrugated fin (10) having a louver (14) whose portion is cut up and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are lined up at predetermined intervals and are arranged at a predetermined interval.
A plurality of grooves extending diagonally with respect to the extending direction of the bent portion are provided.
The plurality of grooves are provided including the bent portion and the louver, and promote drainage from the fin main body portion to the bent portion or the surface of the tube.
Assuming that the plurality of the groove portions are the first groove portion group (110),
On the surface of the corrugated fin, a plurality of the groove portions are arranged at a predetermined interval, and a second groove portion group (120) extending in a direction intersecting the first groove portion group is further provided. Ori,
The groove portion forming the first groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion group provided on the other surface of the corrugated fin in the plate thickness direction. A heat exchanger provided at a position deviated from the groove portion to be formed in the plate thickness direction. A heat exchanger that exchanges heat between fluids.
The tube (20) through which the first fluid flows and
A plurality of bent portions (12) in which plate-shaped members are bent at predetermined intervals, a fin main body portion (13) arranged between the bent portion and the bent portion, and one of the fin main bodies. A corrugated fin (10) having a louver (14) whose portion is cut up and increasing the heat exchange efficiency between the first fluid flowing inside the tube and the second fluid flowing outside the tube.
A plurality of grooves (11) provided on the surface of the corrugated fin so as to increase the hydrophilicity of the surface of the corrugated fin, and the grooves are lined up at predetermined intervals and are arranged at a predetermined interval.
A plurality of grooves extending diagonally with respect to the extending direction of the bent portion are provided.
The plurality of grooves are provided including the bent portion and the louver, and promote drainage from the fin main body portion to the bent portion or the surface of the tube.
Assuming that the plurality of the groove portions are the first groove portion group (110),
On the surface of the corrugated fin, a plurality of the groove portions are arranged at a predetermined interval, and a second groove portion group (120) extending in a direction intersecting the first groove portion group is further provided. Ori,
The groove portion forming the first groove portion group provided on one surface of the corrugated fin in the plate thickness direction and the first groove portion group provided on the other surface of the corrugated fin in the plate thickness direction. A heat exchanger having a different angle with respect to a direction in which the bent portion extends when viewed from the same plate thickness direction as the constituent groove portion.

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