JP2009139030A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger, preventing leakage of a fluid flowing through the interior even when a large load is applied to a side plate. <P>SOLUTION: A side plate 5 of a condenser, which is the heat exchanger, includes a belt-like plate body 5a. Both end parts of the plate body 5a of the side plate 5 are provided with vertical projecting pieces 11, which are respectively projected outward in the longitudinal direction of the side plate 5 over the plate body 5a, and one side of which partially comes into contact with the outer surface of the front part or the rear part of a header 3. The face of the projecting piece 11, which is directed toward the header 3, is provided with a plurality of projections 12 projected toward the header 3. A contact part 11a of the projecting piece 11 to the header 3 and at least one projection 12 are brazed to the header 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger.

  Conventionally, as a heat exchanger, a pair of headers arranged at a distance from each other, and arranged in parallel in the header length direction between both headers, and both ends are connected to both headers. A plurality of heat exchange tubes, side plates arranged at intervals outside the heat exchange tubes at both ends, and fins arranged between adjacent heat exchange tubes and between the heat exchange tubes and side plates at both ends It is known that both end portions of the side plate are brazed to both headers in a state of being inserted into through holes formed in both headers (see Patent Document 1).

By the way, for example, in the case of a heat exchanger used as a condenser of a refrigeration cycle that constitutes a car air conditioner, it is possible to install a condenser in the engine room of an automobile using a side plate, or to attach other parts to the side plate. is there. And in the heat exchanger of patent document 1, since the both ends of a side plate are brazed to both header tanks in the state inserted in the through-hole formed in both headers, respectively, this heat exchanger When a large load is applied to the side plate, the fluid flowing inside (the refrigerant in the case of a capacitor) may leak from the through hole. Moreover, in the heat exchanger of patent document 1, it is necessary to insert the edge part of a side plate in the through-hole of a header at the time of the assembly operation of each component in manufacture, and there exists a problem that workability | operativity falls.
JP 2001-116484 A

  An object of the present invention is to provide a heat exchanger that solves the above-described problems and can prevent leakage of fluid flowing inside even when a large load is applied to a side plate.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A pair of headers spaced apart from each other and a plurality of heat exchanges arranged in parallel between the headers in the lengthwise direction of the headers and having both ends connected to both headers. Heat having a tube, side plates spaced apart on the outside of the heat exchange tubes at both ends, and fins disposed between adjacent heat exchange tubes and between the heat exchange tubes and the side plates at both ends. In the exchanger
The side plate has a belt-like plate body, and protrudes outward in the length direction of the side plate from the plate body at both ends of the plate body of the side plate, and a part of one side is the front part or the rear side of the header. A vertical projecting piece that contacts the outer surface of the part is provided, and a plurality of projecting parts projecting to the header side are provided on a surface facing the header side of the projecting piece. Heat exchanger with two convex parts brazed to the header.

  2) The heat exchanger according to 1) above, wherein the convex portion is a point-like projection.

  3) The heat exchanger according to 1) above, wherein the convex portion is a ridge extending in the length direction of the header.

  4) The protruding piece is formed with at least two protrusions formed at intervals in the length direction of the side plate, and the protruding piece is a front part or a rear part of the header between the two protrusions. The heat exchanger according to any one of the above 1) to 3), which is in contact with the outer surface of the two and has both convex portions brazed to the header.

  According to the heat exchangers 1) to 3) above, the side plate is provided with a belt-like plate body, and protrudes outward from the plate body in the longitudinal direction of the side plate at both ends of the plate body of the side plate. And a vertical projecting piece in which a part of one surface is in contact with the outer surface of the front part or the rear part of the header, and a plurality of convex parts projecting to the header side are provided on the surface facing the header side of the projecting piece. Since the portion of the projecting piece that contacts the header and at least one convex portion are brazed to the header, both end portions of the side plate are brazed to the header at at least two locations. In addition, by adjusting the protruding height of the convex portion to an appropriate height, the brazing is performed in the gap between the contact portion brazed to the header on the protruding piece and the convex portion brazed to the header. Fillets made of materials can be formed. Therefore, the brazing strength between the side plate and the header is increased, and leakage of fluid flowing inside can be prevented even when a large load is applied to the side plate. As a result, when this heat exchanger is used as, for example, a condenser for a refrigeration cycle constituting a car air conditioner, the side plate is used to attach the condenser in the engine room of the automobile, or to attach other parts to the side plate. It becomes possible.

  According to the heat exchanger of 4), the brazing strength between the side plate and the header can be further increased.

  Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the heat exchanger according to the present invention is applied to a condenser for a car air conditioner.

  In the following description, the term “aluminum” includes an aluminum alloy in addition to pure aluminum. In the following description, the upper and lower sides and the left and right sides in FIG. 1 are referred to as the upper and lower sides and the left and right sides, respectively, and the downstream side in the ventilation direction (the direction indicated by the arrow X in FIG.

  FIG. 1 shows the overall configuration of a car air conditioner capacitor, and FIG. FIG. 3 shows a side plate used for a capacitor for a car air conditioner.

  In FIG. 1, a car air conditioner condenser (1) (heat exchanger) includes a pair of aluminum headers (2) (3) extending in the vertical direction and spaced in parallel in the left-right direction, A plurality of flat aluminum heat exchange tubes (4), spaced from each other in the direction and connected to both headers (2) and (3) at both ends, and the outside of the heat exchange tubes (4) at the upper and lower ends That is, the aluminum side plate (5) disposed adjacent to the heat exchange pipe (4) above the heat exchange pipe (4) at the upper end and below the heat exchange pipe (4) at the lower end, and the adjacent heat It is arranged in the ventilation gap between the exchange pipe (4) and the ventilation gap between the heat exchange pipe (4) and the side plate (5) at both ends, and both the heat exchange pipe (4) and the heat exchange pipe (4) And the aluminum corrugated fin (6) brazed to the side plate (5) and the upper end of the peripheral wall of the left header (2) The aluminum inlet member (7), the aluminum outlet member (8) brazed to the lower end of the peripheral wall of the right header (3), and the first provided in the upper position above the middle of the left header (2) 1 partition plate (9) and the 2nd partition plate (10) provided in the inside of the downward position from the middle of the right header (3). As the heat exchange tube (4), a tube made of an extruded tube or an electric resistance welded tube is used. In addition, the heat exchange pipe (4) was integrally formed in a raised shape on the two flat wall forming portions connected via the connecting portion, and on the side edge of each flat wall forming portion opposite to the connecting portion. A single metal plate having a side wall forming portion may be bent at the connecting portion into a hairpin shape and the side wall forming portions may be brazed.

  The number of heat exchange tubes (4) above the first partition plate (9), the number of heat exchange tubes (4) between the first partition plate (9) and the second partition plate (10), the second partition The number of heat exchange pipes (4) below the plate (10) is sequentially reduced from above to form a passage group, and the gas-phase refrigerant flowing from the inlet member (7) is discharged to the outlet member (8 ) In the condenser (1) in a meandering manner in the unit of each passage group before flowing out as a liquid phase.

  As shown in FIGS. 2 and 3, the upper side plate (5) includes a horizontal belt-like plate body (5a), and a rising wall (5b) integrally formed on the front edge of the plate body (5a). The lower bent portion (5c) formed at the left and right ends of the plate body (5a), the lower bent portion (5c), and the lower bent portion (5c) are integrally formed at the lower end of the lower bent portion (5c). An insertion hole formed integrally with the projecting portion (5d) and the front-rear direction central portion at the left and right outer ends of the projecting portion (5d) and projecting outward in the left-right direction to form both left and right headers (2) (3) And an insertion portion (5e) to be inserted into (13).

  The lower side of the upper side plate (5) of the plate body (5a) protrudes downward from the left and right ends of the plate body (5a) at right angles to the plate body (5a). Projecting pieces (11) projecting outward in the left-right direction from both left and right ends of 5a) and in contact with the outer surfaces of the rear portions of the left and right headers (2) (3) are integrally formed. Here, since the headers (2) and (3) are cylindrical, the protruding pieces (11) are in line contact with the outer surfaces of the rear portions of the left and right headers (2) and (3). This contact portion is indicated by (11a). On the left and right sides of the contact part (11a) to the header (2) (3) on the front surface of the protruding piece (11) (the surface facing the header (2) (3) side) By deforming so as to protrude, a dot-like hemispherical protrusion (12) (convex portion) is formed. The tips of both protrusions (12) are in contact with the outer surfaces of the left and right headers (2) and (3). That is, two protrusions (12) are formed on the protruding piece (11) at an interval in the length direction of the side plate (5), and the protruding piece (11) is formed on these two protrusions (12). It is in contact with the outer surface of the header (2) (3). The protrusions (12) on both the left and right sides of the contact portion (11a) are symmetric with respect to the contact portion (11a). The upper side plate (5) has the plate body (5a) brazed to the upper corrugated fin (6), and the left and right insertion portions (5e) are inserted into the left and right headers (2) (3). Inserted into the hole (13) and brazed to both the left and right headers (2) and (3), and the left and right headers (2) and (3) in the protruding piece (11) contact portions (11a) and both protrusions ( 12) is brazed to both the left and right headers (2) and (3). Here, it is preferable that the fillet (14) is formed so as to fill a space between the contact portion (11a) of the protruding piece (11) and both the protrusions (12). Note that the fillet (15) is also formed between the portion excluding the portion facing the contact portion (11a) in the tip end portion of both protrusions (12) and the outer surface of both headers (2) (3). The

  The lower side plate (5) is obtained by turning the upper side plate (5) upside down, and the same portions are denoted by the same reference numerals and description thereof is omitted. The upper and lower side plates (5) are formed by pressing an aluminum base plate.

  4 to 6 show modifications of the side plate.

  In the case of the side plate (20) shown in FIG. 4, the protruding pieces (11) protrude forward on the left and right sides of the contact portion (11a) to the header (2) (3) on the front surface of the protruding piece (11). By deforming in this manner, a plurality of dot-like hemispherical projections (12) (projections) are formed at intervals in the vertical direction, two in this case. The tip of each protrusion (12) contacts the outer surfaces of the left and right headers (2) and (3) and is brazed to the left and right headers (2) and (3). The two protrusions (12) on the left and right sides of the contact portion (11a) are line symmetric with respect to the contact portion (11a).

  Other configurations are the same as those of the side plate (5) of the embodiment shown in FIGS. 1 to 3, and the same portions are denoted by the same reference numerals and the description thereof is omitted.

  In the case of the side plate (25) shown in FIG. 5 and FIG. 6, the protruding pieces (11) are placed on the left and right sides of the contact portion (11a) to the header (2) (3) on the front surface of the protruding piece (11). A convex strip (31) (convex portion) having a substantially V-shaped cross section extending in the vertical direction is formed by being deformed so as to protrude in the vertical direction. The tip of each protrusion (26) is in contact with the outer surfaces of the left and right headers (2) and (3), and is brazed to the left and right headers (2) and (3). The ridges (26) on the left and right sides of the contact portion (11a) are line symmetric with respect to the contact portion (11a). Here, it is preferable that the fillet (27) is formed so as to fill a space between the contact portion (11a) of the projecting piece (11) and the both ridges (26). A fillet (28) is also formed between the left and right outer portions of both ridges (26) and the outer surfaces of both headers (2) and (3).

  In the above embodiment and the modification of the side plate, each projection (12) and both ridges (26) are brazed to the header (2) (3), but this is not limitative. Instead, at least one protrusion (12) and protrusion (26) may be brazed to the header (2) (3) in addition to the contact portion (11a).

It is a perspective view which shows the whole structure of the capacitor | condenser to which the heat exchanger by this invention is applied. It is an enlarged plan view which shows the part of the right side header of the capacitor | condenser of FIG. FIG. 2 is a partially omitted perspective view showing a side plate of the capacitor of FIG. 1. It is a partially-omission perspective view which shows the modification of a side plate. It is a figure equivalent to FIG. 2 which shows the other modification of a side plate. FIG. 6 is a partially omitted perspective view showing the side plate of FIG. 5.

Explanation of symbols

(1): Capacitor (heat exchanger)
(2) (3): Header
(4): Heat exchange pipe
(5) (20) (25): Side plate
(6): Corrugated fin
(11): Protruding piece
(11a): Contact part
(12): Projection (convex part)
(26): Projection (projection)

Claims (4)

A pair of headers spaced apart from each other, and a plurality of heat exchange tubes arranged in parallel in the length direction of the headers between both headers and having both ends connected to both headers, respectively , A heat exchanger comprising side plates arranged at intervals outside the heat exchange tubes at both ends, and fins arranged between adjacent heat exchange tubes and between the heat exchange tubes and the side plates at both ends In
The side plate has a belt-like plate body, and protrudes outward in the length direction of the side plate from the plate body at both ends of the plate body of the side plate, and a part of one side is the front part or the rear side of the header. A vertical projecting piece that contacts the outer surface of the part is provided, and a plurality of projecting parts projecting to the header side are provided on a surface facing the header side of the projecting piece. Heat exchanger with two convex parts brazed to the header. The heat exchanger according to claim 1, wherein the convex portion is a point-like projection. The heat exchanger according to claim 1, wherein the convex portion is a convex line extending in the length direction of the header. At least two convex portions formed at intervals in the length direction of the side plate are formed on the protruding piece, and the protruding piece is an outer surface of the front portion or the rear portion of the header between the two convex portions. The heat exchanger according to any one of claims 1 to 3, wherein both convex portions are brazed to the header.

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