JP3307714B2 - Pin-fin type heat exchanger unit and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a heat radiating section having a group of pin fins arranged at a predetermined pitch so that the pin fin groups are substantially parallel to each other. The present invention relates to a pin fin type heat exchanger unit to which a tube through which a fluid flows, a base for mounting a cooled object, and the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A so-called pin fin type heat exchanger in which fins formed in a heat radiating portion are constituted by needles, ie, pins, has been proposed, for example, in Japanese Utility Model Publication No. 63-2788. As described in the above publication, the pin fin type heat exchanger is composed of a heat radiating portion having a pin fin and a flat tube. The flat tube is bent in a meandering manner so that its planes are parallel. Then, between the flat tubes bent in a meandering shape, the heat radiating portions also bent in a meandering shape are inserted, and the lip portions integrally provided at the upper and lower ends of the heat radiating portion and the flat tube are joined. Thus, a pin fin type heat exchanger is formed. Therefore, for example, a coolant can be caused to flow through the flat tube, air can be caused to flow between the pin fins, and heat can be exchanged between the two.

[0003]

The pin diameter of the pin fin type heat exchanger is, as described in the above publication,
For example, it is extremely small, for example, about 0.3 mm, and is configured as a pin group. The heat dissipating portion in which the pin group is formed is bent in a meandering shape, and the interval between the heat dissipating portions, that is, the pitch of the heat dissipating portion is as small as, for example, about 1 mm. As described above, the pin fin type heat exchanger has high performance as a heat exchanger because the fins are formed as a group of extra fine wires and the pitch of the heat radiating portions is small. However,
The pin fin type heat exchanger has a disadvantage that the efficiency of the manufacturing process is low. There is also a disadvantage that it is difficult to obtain a heat exchanger in which the pitch of the heat radiating section is accurate. More specifically, since the pitch of the heat radiating portion of the pin fin type heat exchanger is small, it is not specified in the above-mentioned publication how to obtain the pitch of the heat radiating portion. Part is bent in a meandering manner, a spacer having a predetermined thickness is interposed between the bent heat radiating part and the heat radiating part, and the upper and lower ends thereof are joined to, for example, a flat tube to form a pin-fin type heat exchanger having a predetermined pitch. It has gained.

As described above, according to the conventional manufacturing method, it is necessary to prepare a spacer having a predetermined thickness, and insert and hold between the heat dissipating portions bent in a meandering shape and then join them. There is a disadvantage that the number of parts increases and the cost increases. In addition, the number of steps for inserting and holding the spacer and taking it out after joining increases, which further increases the cost. If a spacer is used, the cost increases, and if a simple jig or the like is used for joining, since the pitch of the heat radiating portion is as small as about 1 mm, a pin-fin type heat exchanger having an accurate pitch cannot be obtained. If the pitch of the heat radiating portion is too large compared to the diameter of the pin fin, the heat exchange medium, for example, air passes through,
On the other hand, if it is narrow, the flow resistance of air becomes large, and a predetermined heat exchange amount cannot be obtained. Therefore, an object of the present invention is to provide a pin fin type heat exchanger unit in which the pitch of the heat radiating portions where the pin fins are formed is accurate.
It is another object of the present invention to provide a method of manufacturing a pin fin type heat exchanger unit which can manufacture a pin fin type heat exchanger unit having an accurate pitch at low cost.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a heat radiating portion having a pin fin group is formed at a predetermined pitch so that the pin fin group is substantially parallel. arranged, the heat radiating portion of the upper or the upper and lower heat medium flows through the tube, condensing part of the human Topaipu,
A heat exchanger unit adapted based, etc. for attaching the object to be cooled is mounted, the heat radiation
The portion has a meandering bent portion, and integrally includes first and second legs having a predetermined width extending from upper and lower ends thereof in a direction perpendicular to and separated from each other . Leg
The distal end portions and the distal end portions of the second leg portions are in contact with each other, and the heat radiating portions are configured to have a predetermined pitch. The second aspect of the present invention provides the first and second legs.
Make sure that the width is half the pitch of the adjacent heat radiating parts.
The pin fin type heat exchanger unit according to claim 1, wherein
The invention of claim 3, and of claim 3, comprises:
At a position corresponding to the bent part of the leg of
2. The method according to claim 1, wherein the notch has a notch.
Structure like the pin fin type heat exchanger unit described in Item 2.
Is done. According to a fourth aspect of the present invention, the band-shaped heat radiating portion having a predetermined length is integrally extruded with the first and second legs extending in a direction perpendicular to each other from upper and lower ends of the heat radiating portion. Forming, a material processing step of forming by bending of a sheet material, and a pin fin forming step of forming a pin fin group by punching or the like in a direction transverse to the length direction in the heat radiation portion obtained in the material processing step, The heat radiating portion, in which the pin fin group is formed in the pin fin forming step, is bent in a meandering shape together with the legs, and the distal ends of the first legs are connected to each other.
And a bending step of bringing the distal ends of the second leg portions into contact with each other. According to a fifth aspect of the present invention, a heat radiating portion is formed by forming a pin fin group by punching or the like in a direction transverse to the length direction at a substantially central portion in a width direction of a band-shaped sheet material having a predetermined length. A step of forming a heat radiating portion, and forming, by bending or the like, first and second legs extending at right angles to the upper and lower ends of the heat radiating portion obtained in the step of forming the heat radiating portion so as to be separated from each other. And a step of bending the heat radiating portion in which the pin fin group is formed in the heat radiating portion forming step together with the legs obtained in the leg portion forming step in a meandering manner .
The tip of one leg and the tip of the second leg
And a bending process for bringing the abutments into contact with each other.

[0006]

The pin fin type heat exchanger unit according to the first aspect operates as follows. Second leg Oh <br/> Rui first leg or bottom of the upper portion of the heat radiating portion Pinfuin group is formed a tube through which the first and second leg portions, for example, the heat medium of the upper and lower portions Fix it. Then, the pin fin type heat exchanger unit is integrated by the tube, and becomes a high strength heat exchanger. Then, for example, a refrigerant is passed through the tube. On the other hand, if the heat radiating part has a meandering part
Both integrally includes a first and second leg portions having a predetermined width, said first
The tip of one leg and the tip of the second leg
Since Zhi is in contact with one another, the spacing or pitch of the heat radiating portion of the heat radiating portion by these first and second leg portion has a predetermined size. Therefore, for example, air is caused to flow between the heat radiating portions. Then, heat exchange is performed between the refrigerant and the air.

[0007]

Embodiments of the present invention will be described below. As shown in FIG. 1, the heat exchanger material 1 according to the present embodiment has a band-shaped heat radiating portion 2 having a predetermined length and first and second legs 3, 4 having a predetermined width. Formed by extrusion from aluminum or an alloy thereof. First
The leg 3 extends at a right angle to the left in FIG. 1 from the upper end of the heat radiating unit 2. The second leg 4 extends in the same manner at right angles to the right in FIG. 1 from the lower portion of the heat radiating portion 2. The widths H of the first and second leg portions 3 and 4 are equal, and the pitch P of the heat radiating portions 2 and 2 is described in detail later.
It is 1/2 of. Since the heat exchanger material 1 is bent in a meandering manner so as to have a predetermined pitch, the first and second legs 3 and 4 at positions corresponding to the bent portions have cuts 6 and 6 having a predetermined depth. Is inserted. The figure shows a cut 6,
6, only one is shown.

The heat radiating portion 2 of the heat exchanger material 1 formed as described above is provided with pin fins 10, 10,... Having a diameter of zero comma and several millimeters at right angles to the longitudinal direction. These pin fins 10, 10,... Are formed, for example, by punching at predetermined intervals by a press and leaving the pin fins 10, 10,. The heat exchanger material 1 on which the pin fins 10, 10,... Are formed is bent in a meandering manner around the portion where the cuts 6, 6 are formed as shown in FIG. That is, the heat radiating portion 2 is bent so as to have a predetermined length L while the surfaces of the first and second leg portions 3 and 4 are horizontal or parallel to the pin fins 10, 10,. When folded, the tip 7 of the first leg 3 contacts the tip 7 of the first leg 3 and the tip 8 of the second leg 4 contacts the tip 8 of the second leg 4. Touch When the contact is made, the width H of the first and second leg portions 3 and 4 has a half pitch P, so that the pitch between adjacent heat radiating portions 2 has a predetermined pitch P. As a result, as shown in FIG.
Are arranged side by side to obtain a pin-fin type heat exchanger unit U. In such a contact state, the tip 7 of the first leg 3 is fixed by a jig or the like and brazed, so that the first leg 3 is moved to the first position.
The tip 7 of the leg 3 and the tip 8 of the second leg 4 are the second
When joined to the distal end portion 8 of the leg portion 4, the joining strength is weak because the joining surface is small, but the pin-fin type heat exchanger unit U in a temporarily fixed state is obtained.

According to this embodiment, the first and second legs 3, 4 accurately formed by extrusion molding allow the heat radiating portion 2 to be formed.
Is determined, the pin fin type heat exchanger unit U having the accurate pitch P of the heat radiating section 2 is obtained. Further, first and second legs 3 and 4 are integrally formed on the upper and lower ends of the heat radiating portion 2, and these legs 3 and 4 extend substantially perpendicularly from the heat radiating portion 2. Heat exchanger unit U
It does not deform even if a large force acts on it. Therefore, the pin fin type heat exchanger unit U can be made of a thin material. In addition, as described later, the unit U is not deformed during handling or when fixing a tube or the like through which the heat medium flows.

Further, according to the present embodiment, the heat exchanger material 1
Is formed by extrusion, so that continuous molding is possible and inexpensive. Since the first and second legs 3, 4 are brought into contact with each other to obtain the pitch of the heat radiating portions 2, 2,..., The spacers and the like conventionally required are unnecessary, and the pitch P of the heat radiating portions 2, 2,. However, an accurate pin fin type heat exchanger unit U can be manufactured at low cost.

In the above embodiment, the heat exchanger material 1 is integrally formed by extrusion so as to have the heat radiating portion 2 and the first and second legs 3, 4, and then the pin fins 10, 1 are formed.
However, the heat exchanger material 1 can also be formed from a sheet material made of aluminum or an alloy thereof. At this time, the pin fins 10, 10,... Are punched out by a press after being pressed so as to have the strip-shaped heat radiating portion 2 having a predetermined length and the first and second legs 3, 4 having a predetermined width. It can be processed, and a pin fin 10, which is perpendicular to the longitudinal direction, is provided at a substantially central portion in the width direction of the sheet material.
Can be punched by a press, and then the first and second legs 3, 4 can be processed by a press.

The pin fin type heat exchanger unit U manufactured or manufactured as described above has various uses, but is applied to a radiator in FIG. 3 and a fluid heat exchanger in FIG. An example is shown. FIG. 3 shows a state in which the base 15 of the good heat conductor is fixed to only one of the second legs 4, 4,... Of the pin fin type heat exchanger unit U. In this manner, by fixing the base 15 to the legs 4, 4,..., The heat radiators 2, 2,. For example, a semiconductor element is mounted on the base 15, and air generated between the heat radiating parts 2, 2,... Is caused to flow naturally or by natural convection. be able to. Although not shown in the drawing, the base of the heat-conductive material is fixed to the first leg portions 3 and 3 according to the purpose.
A semiconductor element can also be attached to this base, and air can be forcibly sent to the heat radiating portions 2, 2 between the base 15 and the base to cool the semiconductor element. Furthermore, a heat-insulating plate may be fixed to one of the first legs 3, 3, and this plate may be used as a base for attachment to another object.

FIG. 4 shows a plurality of refrigerant passages 22, 22,.
Are bent in parallel at predetermined intervals, and pin-fin type heat exchanger units U, U,... Are inserted between the bent refrigerant tubes 20. The legs 3, 4,...
An example is shown in which the heat exchanger 21 is formed, for example, by blazing on the 0 plane. Obviously, heat can be exchanged by flowing a heat medium through the refrigerant tube 20 of the heat exchanger 21 and, for example, flowing air through the pin fin type heat exchanger units U, U,. Further, the pin fin type heat exchanger unit U according to the present embodiment is not shown in the drawing, but it is also apparent that the pin fin type heat exchanger unit U can be applied to the condensing section of the heat pipe.

[0014]

As described in detail above, according to the present invention,
The pin fin type heat exchanger unit has first and second first and second predetermined widths extending in a direction away from upper and lower ends of the heat radiating portion .
Of the first leg, and the first leg
And the tips of the second legs are in contact with each other,
Since the heat radiating portions have a predetermined pitch, the pitch of the heat radiating portions is accurate. Therefore, when the pin fin type heat exchanger unit according to the present invention is provided with a tube through which a heat medium flows, a condensing portion of a peat pipe, a base for mounting a cooled object, etc., the performance inherent in the pin fin type heat exchanger is provided. A heat exchanger, a radiator, and the like that exhibit sufficient performance can be obtained. In addition, since the first and second legs extending perpendicular to the direction in which they are separated from each other are integrally formed at the upper and lower ends of the heat radiating portion, the legs also function as a reinforcing material, and the pin-fin type The strength of the heat exchanger unit is large. Because the strength is large,
When attaching the refrigerant tube, the base for heat radiation, and the like using the legs, the pin fin type heat exchanger unit is not deformed. The invention according to claim 4 or 5, wherein the first and second legs extend the strip-shaped heat radiating portion of a predetermined length in a direction away from each other at right angles from upper and lower ends of the heat radiating portion. Extruded integrally with the part, formed by bending sheet material, etc., bending the heat radiation part in a meandering shape with the legs,
The tip of the first leg and the tip of the second leg
Since the ends are brought into contact with each other, a pin-fin type heat exchanger unit having an accurate pitch can be manufactured at low cost without using a spacer or the like which increases the cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a material of a pin fin type heat exchanger unit according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a pin fin type heat exchanger unit according to the present invention.

FIG. 3 is a perspective view showing an example in which the pin fin type heat exchanger unit according to the present embodiment is applied to a radiator.

FIG. 4 is a perspective view showing an example in which the pin fin type heat exchanger unit according to the present embodiment is applied to a heat exchanger.

[Explanation of symbols]

2 radiator 3 first
Leg 4 second leg 7 first
8 Leg tip 8 Second leg tip 10 Pin fin

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F28F 1/12 F28F 1/30 F28D 21/00 F28F 1/32 F28F 1/26

Claims (5)

(57) [Claims] 1. A heat dissipation portion Pinfuin group is formed, the Pinfuin groups are arranged in a predetermined pitch to be substantially parallel, tube heat medium flows through the upper or upper and lower portions of the heat dissipating unit, heat Topaipu A condensing section, a heat exchanger unit to which a base or the like for attaching a cooled object is attached, wherein the heat radiating section has a meandering bent portion,
Integrally includes a first and second leg portions of a predetermined width extending in a direction away its upper and lower ends from each other at right angles, said first
The distal ends of the legs of the second leg and the distal ends of the second leg are in contact with each other so that the heat radiating portions have a predetermined pitch.
Pinfuin heat exchanger unit, characterized in that is. 2. The heat radiating portion of which the width of the first and second legs is adjacent.
The length of the switch is half the length of the switch.
Pin-fin type heat exchanger unit. 3. The first and second legs correspond to bent portions.
Characterized by having a notch of a predetermined depth at a position
The pin fin type heat exchanger according to claim 1 or 2.
unit. 4. A band-shaped heat radiating portion having a predetermined length extends in a direction away from each other at right angles from upper and lower ends of the heat radiating portion.
A material processing step of extruding integrally with the first and second legs and forming the sheet material by bending, etc .; and a pin fin group in a direction transverse to the length direction of the heat radiating portion obtained in the material processing step. Forming a pin fin by punching or the like, and radiating the heat radiating portion, in which the pin fin group is formed in the pin fin forming process, in a meandering shape together with the leg, thereby forming the first leg.
A method of manufacturing a pin-fin type heat exchanger unit, comprising: a bending step of bringing the tip portions of the second leg portion into contact with each other. 5. A heat radiating portion forming step of forming a heat radiating portion by forming a pin fin group at a substantially central portion in a width direction of a band-shaped sheet material having a predetermined length in a direction crossing the length direction by punching or the like. A leg forming step of forming, by bending or the like, first and second legs extending at right angles to a direction away from each other at upper and lower ends of the heat radiating section obtained in the heat radiating section forming step; The heat radiating portion, in which the pin fin group is formed in the heat radiating portion forming step, is bent in a meandering shape together with the leg portion obtained in the leg portion forming step, and the distal end portions of the first leg portion and the second leg are bent.
A method for manufacturing a pin-fin type heat exchanger unit, comprising: a bending step of bringing the tip portions of the portions into contact with each other.