JP2008304168A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of reducing component cost. <P>SOLUTION: This heat exchanger includes a plurality of tubes 111, a pair of tanks 120 and 130 communicating with the insides of the tubes 111, and cross-sectionally U-shaped side plates 113 arranged outside the stacked tubes 111, and opened in directions opposite to the stacked tubes 111. Longitudinal ends of a seating surface part 113b of the side plate 113 are inserted into plate holes 120a and 130a formed on header tanks 120 and 130, and projected into the header tanks 120 and 130; and ends of a pair of sidewalls 113a of the side plate 113 are jointed to outer peripheral surfaces of the header tanks 120 and 130. Thereby, the component cost can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger, and is suitable for application to, for example, a condenser provided in a vehicle refrigeration cycle apparatus.

  Conventionally, what is shown by patent document 1 is known as this kind of heat exchanger, for example. That is, a side plate having a U-shaped cross section, a pair of header tanks communicating with the inside of the tube, a lid portion that closes the opening at the longitudinal end of the header tank, and an extension portion that extends from the lid portion to the side plate side And a lid member formed on the extension portion and joined to the side plate is integrally formed from a plate material.

  And the non-tube side edge part of the side plate is formed in the tube side rather than the extension part of the cover member. Further, the joint portion of the lid member is formed so as to extend from the end portion in the width direction of the extension portion to the tube side and to contact the outer wall side of the side plate. Further, a stepped portion that comes into contact with the upper end surface of the end portion on the side opposite to the tube of the side plate is provided integrally with the extended portion of the lid member.

As a result, the lid member is prevented from being tilted at the time of assembling or transporting by reliably restricting the assembling position at the two locations of the opening portion of the header tank and the stepped portion of the extension portion. Brazing becomes possible.
Japanese Patent No. 3858751

  However, according to Patent Document 1, since the side plate and the header tank are joined via the lid member, the shape of the lid member becomes complicated, the number of assembling steps increases, and the component cost increases. There is a problem to do.

  In addition, a bracket is attached to the side plate and mounted on the vehicle via a vibration isolation mechanism. The side plate is loaded with a refrigerant flow of the refrigeration cycle apparatus and vibrations due to vehicle vibrations. That is, the side plate is required to have vibration resistance strength. Furthermore, the side plate is joined to the fin disposed on the outermost side by brazing. Therefore, there is a problem that a load is generated at the joint due to deformation such as twisting due to vibration of the side plate.

  Accordingly, a first object of the present invention is to provide a heat exchanger that can reduce the cost of components. The second object is to provide a heat exchanger capable of improving rigidity for vibration resistance strength.

In order to achieve the above object, the following technical means are adopted. That is, in the first aspect of the present invention, a plurality of tubes (111) through which a fluid flows and a pair of tanks that are disposed at both ends in the longitudinal direction of the tubes (111) and communicate with the inside of the tubes (111). (120, 130) and a cross-section that is disposed outside the stacked tubes (111) and opens in the opposite direction to the stacked tubes (111) in the stacking direction in which the plurality of tubes (111) are stacked. In the heat exchanger (100) having the U-shaped side plate (113),
Ends in the longitudinal direction of the seat surface portion (113b) of the side plate (113) are inserted into plate holes (120a, 130a) formed in the tank (120, 130) and protrude into the tank (120, 130). In addition, the end portions of the pair of side walls (113a) of the side plate (113) are joined to the outer peripheral surface of the tank (120, 130).

  According to the present invention, for example, the lid member (140) can be formed in a simple shape by directly joining the side wall (113a) of the side plate (113) to the outer peripheral surface of the header tank (120, 130). As a result, the number of steps for assembling the heat exchanger can be reduced, and the cost of components can be reduced.

  Further, for example, when the bracket (170) is disposed on the side plate (113), the side plate (113) is directly joined to the outer peripheral surface of the header tank (120, 130). The rigidity for vibration resistance strength can be improved.

  In the second aspect of the present invention, the height (h1) of the central portion of the side wall (113a) of the side plate (113) is the lid member (140 provided at both ends in the longitudinal direction of the tank (120, 130). ), The outer surface position is substantially the same.

  According to this invention, the height of the side wall (113a) of the side plate (113) can be secured. Thereby, the rigidity for vibration-resistant strength can be improved.

  In the invention according to claim 3, the height (h2) of the end portion of the side wall (113a) of the side plate (113) is substantially the same as the end position of both end portions in the longitudinal direction of the tank (120, 130). It is characterized by being formed.

  According to the present invention, it is possible to secure the bonding area of the side wall (113a) of the side plate (113) bonded to the outer peripheral surface of the tank (120, 130). Thereby, the rigidity for vibration-resistant strength can be improved.

  The invention according to claim 4 is characterized in that the side wall (113a) of the side plate (113) has a shape corresponding to the shape of the outer peripheral surface of the tank (120, 130) to be joined. According to this invention, the side wall (113a) of the side plate (113) can be formed in a simple shape.

  In the invention according to claim 5, the longitudinal end of the seat surface portion (113b) protruding into the tank (120, 130) closes the opening (121, 131) of the tank (120, 130), It is characterized in that it functions as a lid for the openings (121, 131).

  According to the present invention, since the lid member (140) can be dispensed with, the component cost can be reduced.

In the invention according to claim 6, a plurality of tubes (111) through which a fluid flows and a pair of tanks (at the both ends in the longitudinal direction of the tubes (111)) that communicate with the inside of the tubes (111) ( 120, 130) and a stacking direction in which a plurality of tubes (111) are stacked, the cross-sectional core is disposed outside the stacked tubes (111) and opens in the opposite direction to the stacked tubes (111). In a heat exchanger (100) having a U-shaped side plate (113),
The longitudinal ends of the seat surface portion (113b) and the side wall (113a) of the side plate (113) are inserted into plate holes (120a, 130a) formed in the tank (120, 130), and the tank (120, 130) and is joined to the tank (120, 130).

  According to the present invention, the end of the side plate (113) can be directly joined to the header tank (120, 130). As a result, the number of steps for assembling the heat exchanger can be reduced, and the cost of components can be reduced.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Hereinafter, the heat exchanger in 1st Embodiment is demonstrated based on FIG. 1 thru | or FIG. Here, the heat exchanger of the present invention is applied to a condenser 100 that condenses and liquefies the refrigerant in the vehicular refrigeration cycle apparatus. FIG. 1 is a front view showing the overall configuration of the condenser. FIG. 2 is an enlarged view showing a joining structure of the left header tank and the side plate. 3 is a view taken in the direction of arrow A shown in FIG.

  As shown in FIG. 1, the condenser 100 of the present embodiment includes a core part 110, a left header tank 120, a right header tank 130, a lid member 140, a liquid receiver 150, a bracket 170, and the like. Each of these members is made of aluminum or an aluminum alloy, assembled by fitting, caulking, jig fixing, or the like, and integrally brazed with a brazing material provided in advance on the surface of each member.

  In the core portion 110, a plurality of tubes 111 and a plurality of fins 112 through which refrigerant (fluid) flows are alternately stacked, and a side plate 113 as a reinforcing member is disposed outside the outermost fins 112. ing. Each member of the core part 110 is also brazed integrally.

  The central portion of the side plate 113 has a U-shaped cross section along the longitudinal direction, and opens in the opposite direction to the tube side, that is, the tube side. Further, the end in the longitudinal direction is formed in a plate shape for joining with header tanks 120 and 130 described later.

  And between a center part and an edge part, it forms as both connection area, and the height dimension (dimension h2 of the tube lamination direction) in the connection area is higher than the height dimension h1 of the side wall 113a of a center part. Also, the dimension is made smaller (h2 <h1) (see FIG. 2). The longitudinal end of the side plate 113 forms a characteristic part in the present embodiment, and details will be described later.

  In FIG. 1, a pair of header tanks (left header tank 120) extending in the direction intersecting the longitudinal direction (vertical direction in the figure) are provided at both left and right ends of the core portion 110, that is, both longitudinal ends of the plurality of tubes 111. And a right header tank 130). Both header tanks 120 and 130 are formed as a cylindrical body having a substantially elliptical cross section, and are formed by extrusion molding.

  Both header tanks 120 and 130 have a plurality of tube holes 120b, and the ends of the tubes 111 are fitted into the tube holes 120b and 130b. Brazed to communicate with each other.

  Further, end portions in the longitudinal direction of the seating surface portion 113b of the side plate 113 are fitted and brazed into plate holes 120a and 130a provided in both header tanks 120 and 130, respectively. A lid member 140 is brazed to the openings 121 and 131 at the longitudinal ends of the header tanks 120 and 130, and the openings 121 and 131 are closed by the lid member 140.

  The lid member 140 is formed by pressing, and is provided with a convex lid portion 140a that fits into the inner wall surfaces of the openings 121 and 131. That is, the lid member 140 is formed so as to plug the inner wall surfaces of the openings 121 and 131 with the lid portion 140a.

  Separator 122, 132a, 132b which partitions internal space is brazed to each header tank 120,130. The inlet-side joint 160 is brazed above the separator 132a of the right header tank 130, and the outlet-side joint 160 is brazed below the separator 122 of the left header tank 120. The header tanks 120 and 130 communicate with the inside.

  A bracket 170 is provided on the side plate 113 on the side opposite to the tube. The bracket 170 is a mounting bracket for mounting the condenser 100 on the vehicle, and is brazed to the seat surface portion 113b and the side wall 113a of the side plate 113. The bracket 170 is provided with an attachment hole, and the condenser 100 is mounted on the body of the vehicle through the attachment hole.

  The liquid receiver 150 is a cylindrical container body formed by extrusion molding, and is brazed to the side wall of the right header tank 130. Then, flow passages 151 and 152 are provided so as to sandwich the separator 132b, and the inside of the right header tank 130 and the liquid receiver 150 communicate with each other.

  In the condenser 100 configured as described above, the joint 160 on the inlet side is connected to the discharge side of the compressor (not shown), and the joint 160 on the outlet side is connected to an expansion valve (not shown). The refrigerant discharged from the compressor flows into the right header tank 130 through the joint 160 on the inlet side, flows in a U-turn through the group of tubes 111 above the separators 122 and 132b, and exchanges heat with external air to condense and liquefy. Is done.

  Further, the refrigerant flows into the receiver 150 from the right header tank 130 and the flow passage 151 and is separated into gas and liquid. Among the gas-liquid separated refrigerant, the liquid-phase refrigerant flows through the flow path 152 and flows from the right header tank 130 through the tube 111 group below the separators 122 and 132b. Out of 160. A desiccant and a filter (not shown) are arranged inside the liquid receiver 150 so that moisture and foreign matters in the refrigerant are removed.

  Here, a joint structure between the side plate 113 and the header tanks 120 and 130 will be described with reference to FIGS. In the condenser 100, there are four end portions in the longitudinal direction of the side plate 113. Since all of them have the same specifications, the left end portion of the side plate 113 provided above the left header tank 120 will be described as a representative.

  As shown in FIGS. 2 and 3, the side plate 113 is formed into a U-shaped cross section by pressing from a plate material, and includes side walls 113a at both ends of the seat surface portion 113b. The back side of the seat surface portion 113b is brazed to the outermost fin 112. In the central portion of the side plate 113, the height of the side wall 113a is h1, and the upper end of the side wall 113a is set to be substantially the same height as the upper surface position (outer surface position) of the lid member 140. .

  In the side plate 113, end portions of the side wall 113 a and the seating surface portion 113 b are formed in a plate shape and joined to the header tank 120. In the connection section and the end of the side plate 113, the height of the side wall 113a is h2, and the upper end of the side wall 113a is substantially the same as the position of the upper surface of the left header tank 120, that is, the end positions of both ends in the longitudinal direction. It is set to be height.

  In the horizontal direction, the end portion of the opposing side wall 113a extends so as to protrude to the left header tank 120 side than the end portion of the seat surface portion 113b, and is formed so as to be joined to the outer peripheral surface of the left header tank 120. ing. That is, an inner wall 113c formed in a shape corresponding to the outer peripheral surface of the left header tank 120 is provided at the end of the side wall 113a.

  The inner wall 113c is a joint between the side plate 113 and the left header tank 120, and is in contact with the outer peripheral surface of the left header tank 120. That is, the opposing inner wall 113c is disposed so as to sandwich a part of the outer periphery of the left header tank 120. Thereby, the edge part of the side wall 113a is joined to the outer peripheral surface of the left header tank 120.

  On the other hand, the end portion of the seating surface portion 113b is fitted and brazed to the plate hole 120a provided in the left header tank 120 in the same manner as the end portion in the longitudinal direction of the tube 111. The end portion of the seat surface portion 113b is accommodated in the left header tank 120. The end portion of the seat surface portion 113b has a protruding length substantially equal to the end portion of the tube 111 and is accommodated in the left header tank 120. The seat surface portion 113b fitted in the plate hole 120a is joined by brazing, so that the seat surface portion 113b is joined to the plate hole 120a of the left header tank 120.

  As described above, the end portion of the seating surface portion 113b of the side plate 113 is fitted into the plate hole 120a of the left header tank 120, and the opposed inner wall 113c is brought into contact with the outer peripheral surface of the left header tank 120. . At this time, the end of the side wall 113a is temporarily assembled to the left header tank 120 by applying pressure (caulking) from the direction of the arrow X shown in FIG.

  The lid member 140 is temporarily assembled by plugging the opening 121 at the longitudinal end of the left header tank 120 with the lid 140a. Then, after temporarily assembling the constituent members, the condenser 100 is integrally brazed so that both ends of the side plate 113 are directly joined to the left and right header tanks 120 and 130. The openings 121 and 131 of the header tanks 120 and 130 are closed by the lid member 140.

  Therefore, unlike the conventional case, the lid member 140 is formed in a complicated shape, and the header tanks 120 and 130 and the side plate 113 are not joined via the lid member 140. Thereby, since the lid member 140 can be formed in a simple shape, it is possible to reduce the man-hours for assembling the condenser 100 and reduce the component cost.

  Further, when the bracket 170 is disposed on the side plate 113 and mounted on the vehicle, vibration due to vehicle vibration is propagated to the side plate 113, but the side plate 113 can be directly joined to the header tanks 120, 130. It is possible to reduce the load on the joint portion to the outermost fin 112 formed on the back side of the surface portion 113b. Thereby, the rigidity for the vibration resistance strength of the side plate 113 can be improved.

(Second Embodiment)
In the present embodiment, the side plate 113 is provided with the function of the lid member 140. FIG. 4 is an enlarged view showing a joining structure of the left header tank and the side plate in the second embodiment. FIG. 5 is a view taken in the direction of arrow A shown in FIG.

  The opening 121 at the end in the longitudinal direction of the left header tank 120 is closed by the seat surface 113b of the side plate 113. That is, as shown in FIGS. 4 and 5, the end portion of the seating surface portion 113b of the side plate 113 is extended so as to protrude to the left header tank 120 side from the longitudinal direction end portion of the side wall 113a. The opening 121 on the end side in the longitudinal direction of the header tank 120 is configured to be closed.

  Here, the end portion of the seat surface portion 113 b of the side plate 113 is formed so as to be fitted to the inner peripheral surface of the left header tank 120. Moreover, the plate hole 120a formed in the left header tank 120 side is formed in the shape corresponding to the edge part of the seat surface part 113b, and the edge part side of the seat surface part 113b is fitted.

  According to the above configuration, the opening 121 on the longitudinal direction end portion side of the left header tank 120 can be closed without providing the lid member 140. As a result, the side plate 113 can have the function of the lid member 140. Therefore, since the number of parts can be significantly reduced, the number of assembling steps for the condenser 100 can be reduced and the part cost can be further reduced.

(Third embodiment)
In the above embodiment, the end portion of the side wall 113a is joined to the outer peripheral side of the left header tank 120, and the end portion of the seat surface portion 113b is accommodated in the left header tank 120. You may comprise so that all the both end sides may be accommodated in the header tank 120,130. FIG. 6 is an enlarged view showing a joining structure of the left header tank and the side plate in the third embodiment. 7 is a view taken in the direction of arrow A shown in FIG.

  The end portion of the side plate 113 of this embodiment is formed in the same U-shaped cross section as the central portion. That is, the plate hole 120a formed on the left header tank 120 side is formed in a shape corresponding to the cross-sectional shape of the end portion of the side plate 113 as shown in FIGS. The sides are mated. According to the above configuration, the side wall 113 a and the seating surface portion 113 b that face the side plate 113 are joined to the header tanks 120 and 130.

  That is, both end sides of the side plate 113 can be directly joined to the header tanks 120 and 130. Further, the end portion of the side plate 113 can be formed in a simple shape like the central portion. Therefore, it is possible to reduce the number of steps for assembling the condenser 100 and reduce the component cost.

(Other embodiments)
In the said 1st-3rd embodiment, although the condenser 100 was demonstrated to the example as a heat exchanger, you may apply to a radiator, an oil cooler, etc. as another heat exchanger. Moreover, the material of each member which comprises a heat exchanger is not restricted to aluminum, It is good also as another stainless steel material, a copper material, etc.

It is a front view which shows the whole condenser structure in 1st Embodiment. It is an enlarged view which shows the joining structure of the left header tank and side plate in 1st Embodiment. FIG. 3 is a view seen from an arrow A shown in FIG. 2. It is an enlarged view which shows the joining structure of the left header tank and side plate in 2nd Embodiment. It is A arrow view shown in FIG. It is an enlarged view which shows the joining structure of the left header tank and side plate in 3rd Embodiment. It is A arrow view shown in FIG.

Explanation of symbols

100: Condenser (heat exchanger)
111 ... Tube 113 ... Side plate 113a ... Side wall 113b ... Seat surface part 120 ... Left header tank, header tank, (tank)
120a ... plate hole 121 ... opening 130 ... right header tank, header tank, (tank)
130a ... plate hole 131 ... opening h1, h2 ... side wall height

Claims (6)

A plurality of tubes (111) through which fluid flows;
A pair of tanks (120, 130) disposed at both longitudinal ends of the tube (111) and communicating with the inside of the tube (111);
In the laminating direction in which the plurality of tubes (111) are laminated, the U-shaped cross section is disposed outside the laminated tubes (111) and opens in the direction opposite to the laminated tubes (111). A heat exchanger (100) having side plates (113) of
Ends in the longitudinal direction of the seating surface portion (113b) of the side plate (113) are inserted into plate holes (120a, 130a) formed in the tank (120, 130), and the tank (120, 130). Projecting in,
An end portion of a pair of side walls (113a) of the side plate (113) is joined to an outer peripheral surface of the tank (120, 130).   The height (h1) of the central portion of the side wall (113a) of the side plate (113) is substantially the same as the outer surface position of the lid member (140) provided at both ends in the longitudinal direction of the tank (120, 130). It is formed so that it may become. The heat exchanger according to claim 1 characterized by things.   The height (h2) of the end portion of the side wall (113a) of the side plate (113) is formed to be substantially the same as the end position of both end portions in the longitudinal direction of the tank (120, 130). The heat exchanger according to claim 1 or 2, characterized by the above.   The side wall (113a) of the side plate (113) has a shape corresponding to the shape of the outer peripheral surface of the tank (120, 130) to be joined. The heat exchanger according to one item.   End portions in the longitudinal direction of the seating surface portion (113b) protruding into the tank (120, 130) close the opening (121, 131) of the tank (120, 130), and the opening (121, 131). The heat exchanger according to any one of claims 1 to 4, wherein the heat exchanger functions as a lid portion. A plurality of tubes (111) through which fluid flows;
A pair of tanks (120, 130) disposed at both longitudinal ends of the tube (111) and communicating with the inside of the tube (111);
In the laminating direction in which the plurality of tubes (111) are laminated, the U-shaped cross section is disposed outside the laminated tubes (111) and opens in the direction opposite to the laminated tubes (111). A heat exchanger (100) having side plates (113) of
Longitudinal ends of the seat surface portion (113b) and the side wall (113a) of the side plate (113) are inserted into plate holes (120a, 130a) formed in the tank (120, 130), and the tank (120, 130) projecting into the tank (120, 130) and being joined to the tank (120, 130).

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