JP3835339B2 - Heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
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.
[0002]
[Prior art]
As a conventional heat exchanger, as shown in Japanese Patent Application Laid-Open No. 9-126665, an extension portion extending toward the side plate 113 on a lid member (cap) 140 that closes the opening 121 at the longitudinal end of the header tank 120 142 and a joint part 143 that contacts the side plate 113 from the extension part 142 are provided to join the joint part 143 to the inner wall of the side plate 113 (FIG. 3). The rigidity of the side plate 113 is improved to improve the durability of the heat exchanger.
[0003]
[Problems to be solved by the invention]
However, in the above prior art, since the joint portion 143 is formed so as to extend toward the opposite tube (111) side, the height dimension of the side wall 113d of the side plate 113 (in the stacking direction of the tubes 111) is increased and the compactness is improved. It was deteriorating.
[0004]
Therefore, as shown in FIG. 4, the present applicant forms a step with respect to the general part so that the position of the opposite tube side end 113 a of the side plate 113 near the extension 142 is closer to the tube 111 than the extension 142. The prototype which provided and formed the junction part 143 so that it might extend in the tube side, and joined to the side plate 113 was examined.
[0005]
In this prototype, the starting portion 113c of the step of the side plate 113 becomes a stress concentration part, which causes a problem that sufficient durability cannot be secured.
[0006]
In view of the above problems, an object of the present invention is to provide a heat exchanger that is compact and has sufficient durability.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following technical means.
[0008]
In the first aspect of the present invention, a side plate (113) having a U-shaped cross-section is provided outside the stacking direction of a plurality of stacked tubes (111) through which a fluid flows, and is open to the opposite tube side. , A pair of header tanks (120, 130) disposed at both longitudinal ends of the tube (111) and communicating with the inside of the tube (111), and openings (at the longitudinal ends of the header tanks (120, 130)) 121, 131) a lid portion (141), an extension portion (142) extending from the lid portion (141) toward the side plate (113), and provided on the extension portion (142) to the side plate (113). In the heat exchanger having the lid member (140) on which the joined portion (143) to be joined is formed, the end portion (113a) on the side opposite to the tube of the side plate (113) is in the vicinity of the extended portion (142). It is formed in a step shape so as to be closer to the tube (111) than the extension (142), and the joint (143) extends from the end in the width direction of the extension (142) to the tube (111), A first joint portion (143a) that contacts the outer wall (113b) of the side plate (113), and a starting portion (113c) that is stepped from the first joint portion (143a) in the longitudinal direction of the side plate (113). It is characterized by being formed from the second joint portion (143b) extending beyond the center.
[0009]
Thereby, in the combined shape of the side plate (113) and the lid member (140), the tube (111) can be reduced in the stacking direction to be compact.
[0010]
In addition, since the second joint (143b) is joined in the vicinity of the stepped starting portion (113c) to increase the rigidity of the side plate (113), stress concentration at the starting portion (113c) is alleviated. And durability strength can be improved.
[0011]
The invention according to claim 2 is characterized in that the stepped starting portion (113c) is formed in a smooth shape.
[0012]
Thereby, the stress value concentrated on the stepped starting portion (113c) can be relaxed, and the durability can be further improved.
[0013]
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
A first embodiment of the present invention is shown in FIGS. Here, it is assumed that the heat exchanger is applied to a condenser 100 that condenses and liquefies the refrigerant in the automotive refrigeration cycle apparatus. First, the overall configuration will be described with reference to FIG.
[0015]
The condenser 100 includes a core portion 110, a left header tank 120, a right header tank 130, a lid member 140, a liquid receiver 150, and the like. Each member is made of aluminum or an aluminum alloy, and is fitted, caulked, and fixed to a jig. Etc., and are integrally brazed by a brazing material previously provided on the surface of each member.
[0016]
In the core portion 110, a plurality of tubes 111 and a plurality of fins 112 through which a refrigerant (fluid) flows are alternately stacked, and a side plate 113 as a strength member is disposed further outward of the outermost fins 112. Each member is integrally brazed. The side plate 113 has a U-shaped cross section in the general part and is open on the side opposite to the tube. Further, the longitudinal end portion is formed in a plate shape for joining with header tanks 120 and 130 described later.
[0017]
A pair of header tanks (a left header tank 120 and a right header tank 130) extending in the stacking direction of the tubes 111 are provided at the left and right portions of the core portion 110 in FIG. ing. Both header tanks 120 and 130 are cylindrical bodies having an elliptical cross section, and are formed by extrusion molding.
[0018]
The header tanks 120 and 130 are provided with a plurality of tube holes (not shown), and the ends of the tubes 111 are fitted into the tube holes so that the tubes 111 and the header tanks 120 and 130 communicate with each other. It is brazed. Further, end portions in the longitudinal direction of the side plate 113 are also fitted and brazed into plate holes (not shown) provided in the header tanks 120 and 130.
[0019]
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.
[0020]
In addition, separators 122, 132a, and 132b that partition the internal space are brazed to the header tanks 120 and 130, respectively. The inlet joint 160 is brazed above the separator 132a of the right header tank 130, and the outlet joint 160 is brazed below the separator 122 of the left header tank 120. It communicates with the inside of 130.
[0021]
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. Flow passages 151 and 152 are provided so as to sandwich the separator 132b, so that the inside of the right header tank 130 and the liquid receiver 150 communicate with each other.
[0022]
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, is heat-exchanged with external air, and is condensed and liquefied. The Further, the refrigerant flows into the liquid 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 is supercooled from the flow path 152 and the right header tank 130 by the tube 111 group below the separators 122 and 132b and flows out from the joint 160 on the outlet side. Incidentally, a desiccant and a filter (not shown) are disposed inside the liquid receiver 150 so that moisture and foreign matters in the refrigerant are removed.
[0023]
Next, the lid member 140, which is a main part of the present invention, and the side plate 113 in the region where the lid member 140 is combined will be described in detail with reference to FIG. In the condenser 100, four lid members 140 are provided. However, since all of them have the same specifications, the lid member 140 provided on the upper side of the left header tank (hereinafter, tank) 120 will be described as a representative.
[0024]
The lid member 140 is formed from a plate material by pressing, and includes a lid part 141, an extension part 142, and a joint part 143. The lid portion 141 is a portion that closes the opening 121 of the tank 120, and a convex portion 141 a that fits the inner wall surface of the opening 121 is provided in the inner region.
[0025]
The extension portion 142 is a plate-like portion extending from the lid portion 141 toward the side plate 113, and the extension portion 142 is formed with a joint portion 143 including a first joint portion 143a and a second joint portion 143b. Yes.
[0026]
That is, the first joint portion 143a is formed so as to extend from both ends of the extension portion 142 in the width direction (perpendicular to the paper surface in FIG. 2) to the tube 111 side, and the inner wall of the side plate 113 The outer wall 113b is contacted. Further, the second joint portion 143b is integrally formed so as to extend in the longitudinal direction of the side plate 113 from the opposite tank side end portion of the first joint portion 143a.
[0027]
On the other hand, the anti-tube side end 113a of the side plate 113 corresponding to the vicinity of the extension 142 of the lid member 140 is formed to be closer to the tube 111 than the extension 142, and the anti-tube of the entire side plate 113 is formed. The side end portion 113a is formed to be stepped in the general portion and the vicinity of the extension portion 142. The stepped starting portion 113c is provided with an R shape and an inclination so as to have a smooth shape.
[0028]
Furthermore, the tip end portion of the second connecting portion 143b extending in the longitudinal direction of the side plate 113 is positioned beyond the starting point portion 113c (on the right side of the starting point portion 113c in FIG. 2).
[0029]
The lid 141 of the lid member 140 configured in this manner is fitted into the opening 121 of the tank 120, and the inner wall of the joint 143 (the first joint 143 a and the second joint 143 b) is outside the side plate 113. The lid portion 141 and the tank 120 are assembled in contact with the wall 113b, and the joint portion 143 and the outer wall 113b of the side plate 113 are brazed.
[0030]
Accordingly, since the joint portion 143 of the lid member 140 is extended to the tube 111 side, the combined shape of the side plate 113 and the lid member 140 can be reduced in the tube 111 stacking direction to be compact.
[0031]
In addition, since the second joint 143b is joined in the vicinity of the stepped starting part 113c and the rigidity of the side plate 113 can be increased, the stress concentration at the starting part 113c can be relaxed to improve the durability. it can.
[0032]
Furthermore, since the stepped starting portion 113c is formed in a smooth shape, the stress value concentrated on the starting portion 113c can be relaxed, and the durability can be further improved.
[0033]
(Other embodiments)
In the said 1st 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. The material of each member constituting the heat exchanger is not limited to aluminum, but may be other stainless steel or copper material.
[Brief description of the drawings]
FIG. 1 is a front view showing an overall configuration of a condenser in a first embodiment of the present invention.
2 is an enlarged view showing the vicinity of a lid member in FIG. 1. FIG.
FIG. 3 is a front view showing the vicinity of a lid member in the prior art.
FIG. 4 is a front view showing the vicinity of a lid member in a prototype.
[Explanation of symbols]
100 condenser (heat exchanger)
111 Tube 113 Side plate 113a Non-tube side end 113b Outer side wall 113c Stepped starting point 120 Left header tank 121 Opening portion 130 Right header tank 131 Opening portion 140 Lid member 141 Lid portion 142 Extension portion 143 Joint portion 143a First Joint part 143b Second joint part

Claims (2)

A side plate (113) having a U-shaped cross-section, which is disposed on the outer side in the stacking direction of the tubes (111) in which a fluid flows and is stacked,
A pair of header tanks (120, 130) disposed at both longitudinal ends of the tube (111) and communicating with the inside of the tube (111);
A lid (141) for closing the opening (121, 131) at the longitudinal end of the header tank (120, 130), and an extension (142) extending from the lid (141) toward the side plate (113). ), A heat exchanger having a lid member (140) provided with a joint portion (143) formed on the extension portion (142) and joined to the side plate (113).
The opposite end portion (113a) of the side plate (113) is formed in a step shape so as to be closer to the tube (111) than the extension portion (142) in the vicinity of the extension portion (142).
The joint (143) extends from the end in the width direction of the extension (142) toward the tube (111) and contacts the outer wall (113b) of the side plate (113). 143a) and a second joint portion (143b) extending from the first joint portion (143a) beyond the stepped starting portion (113c) in the longitudinal direction of the side plate (113). A heat exchanger characterized by that. The heat exchanger according to claim 1, wherein the stepped starting portion (113c) is formed in a smooth shape.

Images