JP2008267751A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of positioning a side plate in manufacturing without inserting the end of the side plate into a header tank. <P>SOLUTION: First protrusions 21, 22 are formed at both front and rear ends of upper ends of lateral inner surfaces of both header tanks 2, and second protrusions 23 are formed at longitudinal centers parts. The side plate 6 comprises a band plate like body 24 located on the lower side of the first protrusions 21, 22; upper side bent parts 25, 26 of both front and rear side edges of the body 24; and a U-shaped part 27 opened to the lower side of the longitudinal center of the body 24. Both ends of both front and rear side edges of the body 24 are formed as first engaging parts 28 engaged with both the first protrusions 21, 22 from the lower side. Both ends of the both bent parts 25, 26 are formed as second engaging parts 29 engaged with both the first protrusions 21, 22 from the longitudinal outside. Both ends of the facing wall of the U-shaped part 27 are formed as third engaging parts 31 engaged with the second protrusion 23 from both longitudinal sides. Both ends of the connecting wall of the U-shaped part 27 are formed as fourth engaging parts 32 engaged with the second protrusion 23 from the upper side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger suitably used as, for example, a heater core incorporated in a car air conditioner of a vehicle.

  A heat exchanger used in a heater core for a car air conditioner that heats a vehicle interior using engine coolant (coolant) includes a pair of header tanks that are spaced apart from each other and a header tank between the header tanks. A plurality of flat heat exchange tubes arranged at intervals in the length direction and having both ends connected to both header tanks, and arranged between adjacent heat exchange tubes and outside the heat exchange tubes at both ends A fin that is joined to the heat exchange pipe, and a side plate that is arranged on the outside of the fins at both ends in the width direction in the ventilation direction and joined to the fin and both header tanks. A rectangular parallelepiped box-shaped tank body opened to the other side of the header tank, and a header plate brazed to the opening end of the tank body and closing the opening of the tank body The tank body has a rectangular top wall, a pair of first side walls connected to a pair of long sides parallel to each other in the length direction of the header tank of the top wall, and other parallel parts of the top wall. It consists of a pair of second side walls connected to a pair of short sides, and a header plate is a rectangular pipe connection wall having a plurality of pipe insertion holes, and is parallel to each other long in the length direction of the header tank of the pipe connection wall The tank connected to the pair of long sides and the pair of first side walls along the outer surface of the opening side end of the first side wall of the tank main body and the pair of other short sides parallel to each other of the pipe connecting wall It consists of a pair of second side walls along the outer surface of the opening side end of the second side wall of the main body, and both end portions of the side plates are inserted into through holes formed in the pipe connection walls of the header plates in both header tanks, respectively. Brazed to the header plates of both header tanks And those that are known (see Patent Document 1). In the heat exchanger described in Patent Document 1, both end portions of the side plates are brazed to the header plates of both header tanks in a state where the both end portions are respectively inserted into through holes formed in the pipe connection walls of the header plates in both header tanks. The reason is that the side plate is positioned before brazing.

However, in the case of the heat exchanger described in Patent Document 1, the engine cooling water flowing in the header tank may corrode the portion of the side plate that protrudes into the header tank. Further, there is a problem that a portion of the side plate that protrudes into the header tank becomes resistance of engine coolant flowing in the header tank. The latter problem is conspicuous when an engine cooling water inlet or outlet pipe is connected to the end face of the header tank.
JP 2001-116484 A

  An object of the present invention is to solve the above problems and provide a heat exchanger that can position the side plate in a state before joining without inserting the end portion of the side plate into the header tank.

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

1) A pair of header tanks spaced apart from each other, and a plurality of heat exchanges arranged between the header tanks in the length direction of the header tank and having both ends connected to both header tanks A pipe, a fin arranged between the adjacent heat exchange pipes and outside the heat exchange pipes at both ends and joined to the heat exchange pipes, and arranged outside the fins at both ends in the width direction in the ventilation direction, And a heat exchanger having fins and side plates joined to both header tanks,
Deviation prevention means for preventing deviation of the side plate in the length direction and the ventilation direction of the header tank between the both end portions of at least one of the side plates and the surfaces facing the heat exchange pipes in both header tanks Is provided, and both ends of the side plate are joined to the header tank in a state in which the side plate is prevented from being displaced by the displacement preventing means.

  2) At least one end of the surface facing the heat exchange tube side in both header tanks is provided with a plurality of projections projecting to the heat exchange tube side, and at least both ends of the side plate on the side where the projection is provided An engaging portion that engages with any one of the protrusions to prevent the side plate from shifting to either the upstream or downstream side in the ventilation direction and either the outer side or the inner side in the length direction of the header tank, and the other An engagement portion is provided to engage the at least one projection to prevent the side plate from shifting to the upstream and downstream sides in the ventilation direction and either the outer side or the inner side in the length direction of the header tank. The heat exchanger according to the above 1), wherein a slip prevention means is constituted by the engaging portion.

  3) Three protrusions are provided in both header tanks at intervals in the ventilation direction, and the length direction positions of the header tanks in the two first protrusions at both ends of the ventilation direction are the same, and the middle of the ventilation direction One second protrusion of the portion is in a position offset inward in the lengthwise direction of the header tank relative to the first protrusion, and the side plate is positioned inward of the lengthwise direction of the header tank relative to the first protrusion A main body, a bent portion integrally formed on both side edges in the ventilation direction of the main body and bent outward in the longitudinal direction of the header tank, and formed in an intermediate portion of the main body in the ventilation direction, and more header than the second protrusion It consists of a U-shaped part that protrudes outward in the longitudinal direction of the tank and opens inward in the longitudinal direction of the header tank. Both end portions of both side edges in the ventilation direction of the main body are connected to the two first protrusions of the header tank. Engage from the inside in the length direction It becomes an engaging portion that prevents the side plate from shifting to the outside in the longitudinal direction of the header tank, and both end portions of both bent portions engage with the two first protrusions from the outside in the ventilation direction, respectively, and on the upstream side in the ventilation direction and It becomes an engaging part which prevents the shift of the side plate to the downstream side, and both ends of the opposing wall part of the U-shaped part engage with the second protrusion from both sides in the ventilation direction, and the upstream side and the downstream side in the ventilation direction Both end portions of the connecting wall portion connecting the opposing wall portions of the U-shaped portion engage with the second protrusion from the outside in the length direction of the header tank, The heat exchanger as described in 2) above, which is an engaging portion that prevents the side plate from shifting inward in the longitudinal direction of the header tank.

  4) Each header tank has a tank body that opens to the other header tank side, and a header plate that is joined to the opening end of the tank body and closes the opening of the tank body and to which the heat exchange pipe is joined. The tank body has a rectangular top wall, a pair of first side walls connected to a pair of parallel sides extending in the length direction of the header tank on the top wall, and the length of the header tank on the top wall The header plate has a rectangular pipe connection wall having a plurality of pipe insertion holes, and a pair of parallel connection lines extending in the length direction of the header tank of the pipe connection wall. A pair of first side walls that are continuous with the side and along the outer surface of the opening side end of the first side wall of the tank main body, and an outer surface of the opening side end of the second side wall of the tank main body that is connected to the side of one end of the pipe connecting wall And the projection is The are formed in the plate 2) or 3) A heat exchanger according.

  5) A pipe connection cap having a fluid passage port is put on the end of each header tank opposite to the second side wall of the tank body and header plate so as to straddle the tank body and header plate. 4. The heat exchanger according to 4) above, wherein the tank is arranged so that the pipe connection cap is on the same side, and the protrusion of the slip prevention means is provided at the end on the pipe connection cap side.

  According to the heat exchanger of 1) above, between the both end portions of at least one of the side plates and the surfaces facing the heat exchange pipe side in both header tanks, in the length direction and the ventilation direction of the header tank A displacement prevention means for preventing the displacement of the side plate is provided, and both side portions of the side plate are joined to the header tank with the displacement prevention means preventing the displacement of the side plate. In a state before joining to the header tank, the side plate can be positioned by preventing the side plate from being displaced in the length direction and the ventilation direction of the header tank by the deviation preventing means. Therefore, unlike the heat exchanger described in Patent Document 1, it is not necessary to insert the end portion of the side plate into the header tank, and corrosion of the side plate by the engine coolant flowing in the header tank is prevented. Further, since the side plate does not protrude into the header tank, it is possible to prevent an increase in resistance of engine cooling water flowing through the header tank. If the side plate is displaced to the outside in the length direction of the header tank, it may not be joined to the fins at both ends, and if it is displaced to the inside in the length direction of the header tank, the fins at both ends may be crushed, The heat exchange tubes at both ends may be deformed and not joined to the header tank. Further, when the side plate is shifted to the upstream side or the downstream side in the ventilation direction, it may not be joined to the fin.

  According to the heat exchangers 2) and 3), it is possible to configure the slip prevention means relatively easily.

  Further, according to the heat exchanger of 3), the joint area between the side plate and the fins at both ends is increased, and the reinforcing effect of the side plate against the internal pressure of the heat exchanger is improved.

  According to the heat exchanger of the above 4), the protrusions constituting the deviation preventing means can be formed relatively easily.

  Like the heat exchanger of the above 5), in the heat exchanger of the above 4), the end of the header tank opposite to the second side wall of the tank main body and the header plate extends across the tank main body and the header plate. In addition, when a pipe connection cap having a fluid passage port is covered, if the end of the side plate is inserted into the header tank as in the heat exchanger described in Patent Document 1, it flows into the header tank. The flow resistance of the fluid flowing out of the header tank increases and the flow resistance of the fluid flowing in the header tank increases. Even in this case, it is configured as in the above 1) to 4) The increase in the flow resistance of the fluid flowing in the header tank can be prevented.

  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 heater core of a car air conditioner.

  In the following description, the top and bottom, left and right in FIG. 1 are referred to as top and bottom, and left and right, and the back side (right side in FIG. 2) in FIG. 1 is the front, and the opposite side is the back.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  FIG. 1 shows the overall configuration of a heater core for a car air conditioner to which a heat exchanger according to the present invention is applied, and FIGS.

  In FIG. 1, the heater core (1) has a width between a pair of left and right aluminum header tanks (2) and (3) that are long and spaced apart from each other, and both header tanks (2) and (3). The left and right sides are oriented in the front-rear direction and spaced apart in the vertical direction (the length direction of the header tanks (2) and (3)), and both left and right ends are connected to both header tanks (2) and (3) A plurality of flat aluminum heat exchange tubes (4) extending in the direction, and between the adjacent heat exchange tubes (4) and outside the heat exchange tubes (4) at both upper and lower ends, respectively. The aluminum corrugated fins (5) joined and the corrugated fins (5) at the upper and lower ends are respectively arranged in the width direction in the ventilation direction, and both the header tanks (2) (3) and the corrugated fins (5 And side plates (6) and (7) joined to each other.

  The left header tank (2) is joined to a substantially box-shaped tank body (8) that is open in the right direction and is long in the vertical direction, and the opening end of the tank body (8) and closes the opening of the tank body (8). In addition, an aluminum header plate (9) to which the heat exchange pipe (4) is brazed is provided.

  2 to 4, the tank body (8) has a rectangular top wall (11) that is long in the vertical direction, and a pair of long side walls (12) connected to both front and rear long sides of the top wall (11). ) (First side wall) and a short side wall (13) (second side wall) (see FIG. 1) connected to the lower short side portion of the top wall (11), which also opens upward. The header plate (9) is a rectangular pipe connection wall (14) that is long in the vertical direction, is connected to both the front and rear long sides of the pipe connection wall (14), and the right end of the long side wall (12) of the tank body (8) ( Open side end) A pair of long side walls (15) brazed along the outer surface (first side wall) and the lower short side of the pipe connecting wall (14) and the tank body (8) A short side wall (16) (second side wall) (see FIG. 1) brazed along the outer surface of the right end of the short side wall (13), and a plurality of pipes long in the front-rear direction are provided on the pipe connecting wall (14). Insertion holes (17) are formed at intervals in the left-right direction. The upper end of the tank body (8) and header plate (9) in the left header tank (2) is covered with a pipe connection cap so as to straddle the tank body (8) and header plate (9). ) And the header plate (9). The pipe connection cap (18) is formed with a fluid passage port (19) that allows the pipe to be connected to the inside and outside of the left header tank (2).

  Although not shown in detail, the tank body (8) is brazed to a required portion by bending a metal base plate made of an aluminum brazing sheet having a brazing material layer on one side so that the brazing material layer is on the outer surface side. The header plate (9) is formed by bending a metal base plate made of an aluminum brazing sheet having a brazing filler metal layer on one side so that the brazing filler metal layer is on the outer surface side, and the required portion is attached to the tank body (8). It is formed by brazing.

  Three protrusions (21), (22), and (23) are in the front-rear direction (ventilation direction) at the upper end of the right side of the pipe connection wall (14) in the header plate (9) (the face facing the heat exchange pipe (4) side) ) At intervals (see FIG. 2). The vertical positions of the two first protrusions (21) and (22) at the front and rear end parts (position in the length direction of the header tank (2)) are the same, and the second protrusion (23) at the central part in the front and rear direction is The position which is biased to the lower side (the inner side in the length direction of the header tank (2)) about half of the vertical dimension of the first protrusions (21) and (22) with respect to the first protrusions (21 and 22) It is in.

  The right header tank (3) is the left header tank (2) reversed left and right, and the same components and the same parts are denoted by the same reference numerals.

  The upper side plate (6) consists of a strip-like body (24) located below the first protrusions (21) and (22), and both front and rear edges of the body (24) (both edges in the ventilation direction). The bent part (25) (26) that is integrally formed over the entire length and bent upward (outer in the length direction of the header tanks (2) and (3)) and the central part in the front-rear direction of the main body (24) The U-shaped part (27) which is integrally formed and protrudes upward from the second protrusion (23) and opens downward. Here, the left and right ends of the front and rear side edges of the main body (24) are engaged with the two first protrusions (21) and (22) from below, and the upper side plate (6) is displaced upward. The first engaging portion (28) to be prevented and the left and right end portions of both bent portions (25) and (26) are respectively engaged with the two first protrusions (21) and (22) from the outside in the front-rear direction (outside the ventilation direction). And the second engaging portion (29) for preventing the upper side plate (6) from shifting to the front and rear sides. In addition, the left and right ends of the pair of opposing wall portions of the U-shaped portion (27) are engaged with the second protrusion (23) from both the front and rear sides, and the upper side plate (6) is displaced from both the front and rear sides. The right and left end portions of the connecting wall portion connecting the opposing wall portions of the U-shaped portion (27) engage with the second protrusion (23) from the upper side; The fourth engaging portion (32) prevents the upper side plate (6) from shifting downward. The upper side plate (6) includes first and second protrusions (21), (22) and (23) of the header plate (9) of both header tanks (2) and (3), and the first of the upper side plate (6). ~ The four engaging portions (28), (29), (31), and (32) are brazed to both header plates (9) and the upper corrugated fins (5).

  The first and second protrusions (21), (22), (23) of the header tanks (2), (3), and the first to fourth engaging portions (28), (29) of the upper side plate (6). (31) and (32) constitute a displacement prevention means for preventing the displacement of the upper side plate (6) in the vertical direction and the front-rear direction.

  The lower side plate (7) has the same shape as the upper side plate (6) and is spaced in the front-rear direction on the short side walls (16) at the lower ends of the header plates (9) of both header tanks (2) (3). The two folded engagement claws (33) formed integrally are engaged with the front and rear side portions of the U-shaped portion (27) at the left and right ends of the body (24) of the lower side plate (7). In this state, it is brazed to both header plates (9) and the corrugated fin (5) at the lower end (see FIG. 1).

It is a front view which shows the whole structure of the heater core for car air conditioners to which the heat exchanger by this invention is applied. It is an AA line expanded sectional view of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 2. It is CC sectional view taken on the line of FIG.

Explanation of symbols

(1): Heater core
(2) (3): Header tank
(4): Heat exchange pipe
(5): Corrugated fin
(6): Upper side plate
(7): Lower side plate
(8): Tank body
(9): Header plate
(11): Top wall
(12): Long side wall (first side wall)
(13): Short side wall (second side wall)
(14): Pipe connection wall
(15): Long side wall (first side wall)
(16): Short side wall (second side wall)
(18): Cap for pipe connection
(19): Fluid passage port
(21) (22) (23): Projection
(24): Strip plate body
(25) (26): Bending part
(27): U-shaped part
(28) (29) (31) (32): Engagement part

Claims (5)

A pair of header tanks spaced from each other, and a plurality of heat exchange pipes disposed between the header tanks in the length direction of the header tank and having both ends connected to the header tanks. The fins disposed between the adjacent heat exchange tubes and outside the heat exchange tubes at both ends and joined to the heat exchange tubes, and disposed outside the fins at both ends in the width direction in the direction of ventilation, and the fins And a heat exchanger with side plates joined to both header tanks,
Deviation prevention means for preventing deviation of the side plate in the length direction and the ventilation direction of the header tank between the both end portions of at least one of the side plates and the surfaces facing the heat exchange pipes in both header tanks Is provided, and both ends of the side plate are joined to the header tank in a state in which the side plate is prevented from being displaced by the displacement preventing means. A plurality of protrusions protruding toward the heat exchange pipe are provided at least at one end of the surface facing the heat exchange pipe in both header tanks, and at least one of both ends of the side plate on the side where the protrusion is provided. An engaging portion that engages with one protrusion to prevent the side plate from shifting to either the upstream side or the downstream side in the ventilation direction and either the outer side or the inner side in the length direction of the header tank, and at least one other An engaging portion is provided to engage the two protrusions to prevent the side plate from shifting to the upstream and downstream sides in the ventilation direction and either the outer side or the inner side in the length direction of the header tank. The heat exchanger according to claim 1, wherein a slip prevention means is constituted by the joint portion. Both header tanks are provided with three projections at intervals in the ventilation direction, the length direction positions of the header tanks at the two first projections at both ends in the ventilation direction are the same, and the middle of the ventilation direction A strip-shaped body in which one second protrusion is located at a position offset inward in the lengthwise direction of the header tank relative to the first protrusion, and the side plate is positioned inward of the lengthwise direction of the header tank relative to the first protrusion A bent portion integrally formed on both side edges in the ventilation direction of the main body and bent outward in the longitudinal direction of the header tank, and formed in an intermediate portion in the ventilation direction of the main body, and more than the second protrusion of the header tank. It consists of a U-shaped part that protrudes outward in the length direction and opens inward in the length direction of the header tank. Both end portions of both side edges in the ventilation direction of the main body are two first protrusions in the length of the header tank. Engaged from the inside in the direction, and It becomes an engaging part that prevents the displacement of the side plate to the outside in the longitudinal direction of the saddle tank, and both ends of both bent parts engage with the two first protrusions from the outside in the ventilation direction, respectively, and upstream and downstream in the ventilation direction It becomes an engaging part which prevents the shift of the side plate to the side, and both end parts of the opposing wall part of the U-shaped part are engaged with the second protrusion from both sides in the ventilation direction, and upstream and downstream in the ventilation direction Both end portions of the connecting wall portion connecting the opposing wall portions of the U-shaped portion engage with the second protrusion from the outside in the length direction of the header tank, and The heat exchanger according to claim 2, wherein the heat exchanger is an engaging portion that prevents the side plate from shifting inward in the lengthwise direction of the header tank. Each header tank has a tank body that opens to the other header tank side, and a header plate that is joined to the opening end of the tank body and closes the opening of the tank body and to which the heat exchange pipe is joined. The tank body has a rectangular top wall, a pair of first side walls connected to a pair of parallel sides extending in the length direction of the header tank of the top wall, and a length direction of the header tank of the top wall A rectangular pipe connection wall having a plurality of pipe insertion holes, and a pair of parallel side parts extending in the length direction of the header tank of the pipe connection wall. And a pair of first side walls along the opening side end outer surface of the first side wall of the tank body, and a side part of one end of the pipe connection wall and along the opening side end outer surface of the second side wall of the tank body. Consists of the second side wall and the protrusion is the header The heat exchanger of claim 2 or 3 wherein are formed to the rate. A pipe connection cap having a fluid passage port is put on the end of each header tank opposite to the second side wall of the tank body and the header plate so as to straddle the tank body and the header plate. The heat exchanger according to claim 4, wherein the pipe connection cap is disposed so as to be on the same side, and a protrusion of the slip prevention means is provided at an end on the pipe connection cap side.

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