JP2001124491A - Integrated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an integrated heat exchanger in which a radiator core and a condenser core can be simply and surely coupled with each other and the number of parts can be reduced. SOLUTION: This is an integrated heat exchanger for an automobile where a condenser core 20 is laid on top of a radiator core 10. A bracket 60 made of synthetic resin, which has an engaging tube 62 integrally, is attached to the side plate 30 of the condenser core 20. Engaging projections 50 corresponding to the engaging tubes 62 are made integrally in advance in the upper tank 11 and the lower tank 12 of the radiator core 10. The condenser core 20 is coupled with the radiator core 10 by setting and engaging the engaging projection 50 in the engaging tubes 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an integrated heat exchanger suitably used as an automobile heat exchanger or the like in which an engine cooling radiator and a car air conditioner condenser are connected in an overlapping state.

[0002]

2. Description of the Related Art In general, an automobile is equipped with a condenser as a condenser for a car air conditioner, in addition to a radiator for cooling an engine.

As a radiator, an upper tank and a lower tank are arranged at both upper and lower ends in a horizontal direction, and a plurality of heat exchange tubes having upper and lower ends connected to each other are arranged in parallel in the horizontal direction. One having a panel-shaped radiator core is well known.

As a condenser, a pair of headers is disposed at both left and right ends, and a plurality of heat exchange tubes, both ends of which are connected to each other, are arranged in parallel in a vertical direction. Those having a core are well known. In particular, as such a capacitor core, each component of the core is made of aluminum or the like provided with a brazing material in required portions, and these components are temporarily assembled, and the temporarily assembled product is placed in a furnace. In many cases, a batch brazing type in which the whole is integrated by brazing at a time is adopted.

Conventionally, in a heat exchanger integrated with a radiator core and a condenser core, it is customary to arrange the condenser core on the front side of the radiator core and to connect the condenser core to the vehicle. As a connection method, a method of brazing a metal bracket to the header of the capacitor core and fixing the bracket to the radiator core using bolts or the like is general.

[0006]

However, when the bracket fixed to the capacitor core is connected to the radiator core by bolts, a complicated bolting operation is required, which makes it difficult to connect the cores. Was.

[0007] Brackets are usually brazed and fixed to the core at the same time as the collective brazing. However, during the collective brazing, misalignment or thermal deformation occurs in each component of the core including the bracket. There is. If such misalignment occurs, it is difficult to accurately align the bracket to a predetermined position when connecting to the radiator core, even if it is within the range of error. There is a problem that it may not be possible to perform smoothly.

On the other hand, in addition to the above, for example, a method in which a metal connecting pin is fixed to the lower end face of the header of the capacitor core, and the pin is inserted into a predetermined position of the radiator core to connect the two cores is adopted. Have been. However, even in such a connecting pin method, since there is an assembling error due to tolerances or the like, conventionally, the connecting pin is fixed to the capacitor core via anti-vibration rubber and the like, and connected to the radiator core. Occasionally, it is necessary to absorb the assembly error with a vibration-proof rubber. Therefore, there is a problem that the number of parts increases due to the provision of the vibration isolating rubber.

The present invention solves the above-mentioned problems of the prior art, and can easily and surely connect heat exchanger cores such as a radiator core and a capacitor core, and can reduce the number of parts. The purpose is to provide a vessel.

[0010]

In order to achieve the above object, the present invention connects a panel-shaped first heat exchanger core to a panel-shaped second heat exchanger core so as to be superposed. In the integrated heat exchanger, a bracket made of synthetic resin is provided on the first heat exchanger core, and one of the engagement means of the engagement protrusion made of synthetic resin and the engagement recess made of synthetic resin includes The first heat exchanger is provided on the bracket, the other engaging means is provided on the second heat exchanger core, and the one engaging means is engaged with the other engaging means. The gist is that the core is connected and fixed to the second heat exchanger core.

In the integrated heat exchanger of the present invention, the first
Both cores can be connected only by engaging one engaging means of the heat exchanger core with the other engaging means of the second heat exchanger core.

[0012] Further, since the engaging protrusions made of synthetic resin are engaged with the engaging recesses to connect the two cores, not only the play and clearance between the engaging protrusions and the recesses but also the bending of the resin itself. Due to the deformation or the like, the assembly error between the two cores can be reliably absorbed.

Further, since the assembling means can also absorb assembly errors such as tolerances, it is not necessary to separately use an assembly error absorbing member, for example, an anti-vibration rubber, and the number of parts can be reduced.

On the other hand, in the present invention, the first heat exchanger core includes a plurality of heat exchange tubes having both ends connected to both headers arranged in parallel between a pair of headers. A radiator core comprising a condenser core having a side plate provided outside an exchange tube, wherein the first heat exchanger core has a synthetic resin upper tank provided at an upper end and a synthetic resin lower tank provided at a lower end. It is preferable to adopt the one constituted by

That is, the present invention is useful as an integrated heat exchanger for automobiles in which the mounting space is severely restricted.

Further, in the present invention, the one engaging means is formed integrally with the bracket and the bracket is attached to the side plate, or the one engaging means is attached to the bracket. It is preferable to adopt a configuration in which the bracket is integrally formed and the bracket is attached to the header.

That is, when these configurations are adopted, existing capacitor cores and the like are not adversely affected.
The bracket can be securely attached.

Further, in the present invention, it is preferable to adopt a structure in which the other engagement means is formed integrally with at least one of the upper tank and the lower tank.

That is, when this configuration is adopted,
The work of attaching the other engaging means to the radiator core or the like can be omitted, and the number of work steps can be reduced.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> FIG. 1 is an exploded perspective view showing an integrated heat exchanger according to a first embodiment of the present invention. As shown in both figures, this integrated heat exchanger has a radiator core (10) and a condenser core (20) as a panel-shaped heat exchanger core.

The radiator core (10) has upper and lower ends,
A long synthetic resin upper tank (11) and a lower tank (12) are arranged in the left and right horizontal directions, and a number of flat tubes (13) extending vertically are provided between both tanks (11) and (12). Are connected in parallel to both tanks (11) and (12) in the left-right direction, and corrugated fins (14) are interposed between the flat tubes (13).

Further, engaging projections (50) projecting forward are provided on both sides of the front surface of the upper and lower tanks (11) and (12) of the radiator core (10).
Are formed integrally. As shown in FIGS. 4 and 5,
Each engaging projection (50) has a retaining piece (5
1) is formed integrally.

As shown in FIGS. 1 and 2, the capacitor core (20) has a pair of headers (21) (21) arranged vertically on both left and right sides.
(21) A large number of flat tubes (2
3) are arranged in parallel in the vertical direction with both ends communicating with both headers (21) and (21), and the corrugated fins (1) are arranged between the flat tubes (23).
4) is interposed. Further, outside the outermost corrugated fin (14), groove-shaped side plates (30) (30) are arranged with the opening direction facing outward.

As shown in FIGS. 1 to 4, of the front and rear rising walls (31) and (32) of each side plate (30), the rear rising wall (32) is engaged with the radiator core (10). A convex part insertion hole (33) is formed corresponding to the convex part (50). Further, screw insertion holes (32a) (32) are provided on both sides of the projection insertion hole (33) in the rear rising wall (32) of the side plate (30).
a) is formed and its screw insertion hole (32a) is formed.
Corresponding to (32a), the front rising wall (31) is formed with threaded holes (31a) (31a) in which thread grooves are cut.

The capacitor core (20) includes, for example, its headers (21) and (21) and the flat tube (2).
3) The side plate (30) is made of an aluminum brazing sheet having brazing material laminated on both sides or one side, and the corrugated fin (14) is made of an aluminum press-formed product. Then, these components are temporarily assembled, and the temporarily assembled products are collectively brazed in a furnace, whereby the whole is integrated.

On the other hand, a bracket (60) provided on the side plate (30) of the capacitor core (20) is made of a synthetic resin molded product, and has an outer frame body (61) in the shape of a rectangular cylinder,
A cylindrical engaging cylinder (62) is integrally formed inside the outer frame (61) and serves as an engaging recess. An elastic piece (6) having one end connected to the peripheral wall is provided on the peripheral wall of the engagement cylinder (62).
3) are provided at equal intervals in the circumferential direction. The elastic piece (63) is configured such that the free end side (projection insertion side) can be expanded and deformed by its own elastic force. An engagement claw (64) projecting inward is formed on the inner surface of the elastic piece (63) on the free end side.
As shown in FIG. 3, screw insertion portions (65) (65) penetrating in the axial direction are formed on both sides of the engagement cylinder (62) inside the outer frame (61) of the bracket (60). ing.

The resin bracket (60) having the above structure is
The capacitor core (20) is mounted on both sides of two upper and lower side plates (30) (30). That is, as shown in FIG.
The side wall (31) of the side plate (30) is adapted so that the end of the engagement tube (62) on the side of the protrusion is fitted to the protrusion insertion hole (33) of the side plate (30).
(32), and in this state, the screw (70) is inserted through the screw insertion hole (32a) of the side plate (30) and the screw insertion part (65) of the bracket (60), and the side plate (30) is inserted. ) Is screwed into the threaded hole (31a). In this way, the bracket (60) is connected to the rising walls (31) (3) on both sides.
2) Hold and fix.

On the other hand, the condenser core (20) to which the bracket (60) is attached is connected to the radiator core (10).
In order to connect the capacitor core (20) to the engagement core (20) of the bracket (60) of the capacitor core (20), the engagement cylinder (62) corresponds to the engagement protrusion (50) of the radiator core (10). What is necessary is just to press so that it may overlap with the front surface of a radiator core (10). As a result, as shown in FIGS. 4 and 5, the engagement projection (50) is inserted into the engagement cylinder (62) of the bracket (60) through the projection insertion hole (33) of the side plate (30). Is done. During this insertion, the engaging claw (64) of the engaging cylinder (62) is pushed outward by the outer surface of the retaining piece (51) in the engaging convex portion (50), and the elastic piece (63) is expanded elastically. While being deformed, the engagement projection (50) is inserted into the engagement cylinder (62), and when the engagement projection (50) is inserted to a predetermined position, the elastic piece (63) is elastically returned to the original state, and the engagement is performed. The pawl (64) engages with the retaining piece (51). The engagement protrusion (50) engages with the engagement cylinder (62) in the retaining state in this manner, so that the capacitor core (2) is engaged.
0) is connected to the radiator core (10) to form an integrated heat exchanger.

According to this integrated heat exchanger, the resin bracket (60) is fixed to the condenser core (20), and the resin of the radiator core (10) is placed in the engagement cylinder (62) of the bracket (60). The cores (10) and (20) are connected by fitting and engaging the engagement protrusions (50). In this way, the engaging projection (50) is connected to the engaging cylinder (6).
The two cores (10) and (20) can be connected simply by being fitted into 2). For example, complicated work such as screwing and bolting is not required, so that the connecting work of both cores can be easily performed. Can be.

Further, even when the components are displaced or deformed at the time of batch brazing of the capacitor core (20) and an assembling error occurs, even if the assembling protrusion (50) and the engaging cylinder (6) are used.
2) In addition to the play and clearance between the two, the above-described assembly error can be absorbed without difficulty by bending deformation of the resin itself forming the engaging projections (50) and the bracket (60), so that it is ensured. Both cores (10) and (20) can be connected.

Further, the engaging projection (50) and the bracket (6)
According to 0), an assembly error such as a tolerance can be absorbed, so that it is not necessary to use a separate member for absorbing a displacement such as an anti-vibration rubber, and the number of parts can be reduced accordingly.
Work man-hours and costs can be reduced.

<Second Embodiment> FIG. 6 shows a second embodiment of the present invention.
FIG. 7 is a rear view showing the vicinity of a bracket of a condenser core in the integrated heat exchanger according to the embodiment, and FIGS. 7 to 9 are views showing the bracket. As shown in these figures, in this embodiment, the bracket (160)
It is attached to the header (21) of the capacitor core (20).

That is, the bracket (160) made of a synthetic resin in the present embodiment, in the mounted state of FIG. 9 (a), includes a fixed wall (161) arranged along the back side of the capacitor core (20) and a capacitor (161). It has an opening / closing wall (166) arranged along the front side of the core (20) and a connecting wall (165) integrally formed between the two walls (161) and (166).

On the outer surface of the fixed wall (161), an engaging projection (162) is integrally formed at the center, and two
Two nut receiving recesses (163) (163) are formed side by side.

The engaging projection (162) is in the shape of a rectangular tube, and has elastic pieces (1) having one end connected to the peripheral wall at the top and bottom of the peripheral wall.
62a) and (162a) are formed. In addition, elastic pieces (16
Engagement claws (162b) (162b) protruding outward are integrally formed on the outer surface on the free end side of 2a) (162a). The elastic pieces (162a) and (162a) are set so that the engaging claws (162b) and (162b) are immersed.
It is configured so that it can be elastically deformed inward.

Further, on the inner surface of the fixed wall (161), bolt insertion collars (164) (164) are integrally formed corresponding to the nut receiving recesses (163) (163). In addition, as shown in FIG.
A through hole (163a) is formed in the bottom wall of (3), and the collar (16) is formed through the through hole (163a).
The cylindrical hole of 4) and the inside of the nut receiving recess (163) communicate with each other.

The opening / closing wall (166) and the connecting wall (16)
5), a thin hinge (165a) is interposed, and the hinge (165a) is used as a fulcrum to rotate the open / close wall (166) so that the open / close wall (166) is fixed to the fixed wall (165). 161) and the connecting wall (165). Further, bolt insertion holes (166a) (166a) are formed on the tip side of the opening / closing wall (166) in correspondence with the collars (164) (164).
As shown in (a), when the open / close wall (166) is closed, a collar (16) is provided on the inner surface of the open / close wall (166).
The tip of 4) abuts and locks and the bolt insertion hole (166a)
And the cylindrical hole of the collar (164) communicate with each other.

The bracket (160) having this structure is used to connect the headers (21) (2) in the capacitor core (20).
It is attached to the upper and lower positions of 1). That is, as shown in FIG. 9 (b), the collar (164) is inserted between the adjacent flat tubes (23) of the condenser (20) with the bracket (160) having its opening / closing wall (166) opened. The fixed wall (161) is arranged along the back of the capacitor (20). Next, as shown in FIG. 9A, the open / close wall (166) is closed, and the open / close wall (1) is closed.
66) is arranged along the front side of the capacitor core (20), and in this state, the bolt (170) is connected to the opening / closing wall (16).
6) is inserted through the bolt insertion hole (166a), the cylindrical hole of the collar (164), and the through hole (163a), and fastened to the nut (171) housed in the nut housing recess (163). Thereby, the bracket (160) is fixed to the header (2) by the fixed wall (161) and the opening / closing wall (166).
1) is clamped from the front and back and fixed to the header (160).

On the other hand, as shown in FIGS. 7 and 8, the radiator core connecting the capacitor core (20) is engaged with the engaging projection (162) of the bracket (160) in a positionally corresponding manner. The engaging cylinder made of synthetic resin (15
0) are respectively formed. This engagement cylinder (150)
Has a rectangular cylindrical shape that is slightly larger than the engaging convex portion (162), and is configured so that the engaging convex portion (162) can be fitted outside. Further, rectangular engagement holes (151) (151) are formed on both upper and lower walls of the engagement cylinder (150) so that the engagement claws (162b) of the engagement projections (162) can be elastically engaged. I have.

In this embodiment, in order to connect the condenser core (20) to the radiator core, the engaging projections (162) of the condenser core (20) are made to correspond to the engaging cylinders (150) of the radiator core, respectively. Then, the capacitor core (20) is pressed so as to overlap the radiator core. As a result, as shown in FIGS. 7 and 8, the engaging projection (162) is inserted into the engaging cylinder (150), and the engaging claw (162b) elastically engages with the engaging hole (151). , A capacitor core (20) is connected to the radiator core.
Other configurations are the same as above.

In the integrated heat exchanger of this embodiment, the same effect can be obtained in the same manner as described above. Furthermore, in this embodiment, since the bracket (160) is attached to the header (21) of the capacitor core (20), regardless of the shape of the side plate (30) of the capacitor core (20), the bracket (160) is mounted.
Can be securely attached to the capacitor core (20), and the versatility can be improved.

<Third Embodiment> FIG. 10 is a perspective view showing a bracket (260) in an integrated heat exchanger according to a third embodiment of the present invention. As shown in the figure, the bracket (260) is attached to a capacitor core (20) having a flat plate-shaped side plate (30).

That is, the bracket (260) is a groove-shaped bracket body (26) made of a synthetic resin molded product.
1) and an engaging projection (262) made of synthetic resin integrally formed on the outer surface of one side wall of the bracket body (261).
And

On one side wall of the bracket body (260),
Screw insertion holes (260a) (260a) are formed, and screw cut holes (260b) (260b) are formed on the other side wall corresponding to the holes (260a) (260a). Also, on the outer periphery of the distal end of the engagement convex portion (262),
A plurality of engaging claws (262a) are formed.

The bracket (260) having this configuration is arranged such that the side plate (30) of the capacitor core (20) is accommodated in the U-shaped groove of the bracket body (261), and the screw insertion hole ( 260a) is inserted between the side plate (30) and the heat exchange tube.
Alternatively, it is attached to the condenser core (20) by being passed between adjacent heat exchange tubes and screwed into the threaded hole (260b).

In this embodiment, the radiator core is provided with an engagement recess which can be engaged with the engagement projection (262), and the capacitor core (20) is overlapped with the radiator core. By elastically engaging the engaging projection (262) with the engaging recess, the capacitor core (2) is formed.
0) to the radiator core. FIG. 1
0, reference numeral (262a) denotes a retaining piece protruding from the outer peripheral surface of the engaging projection (262), and when the engaging projection (262) is engaged with the engaging recess on the radiator core side, The retaining piece (262a) is configured to engage with an engaging claw provided in the engaging recess in a retaining state.

By the way, in each of the above embodiments, the engaging projection is made to project from the opposing surface of the core.
In the present invention, in consideration of the types of the condenser core and the radiator core, the heat exchanger mounting space of the vehicle body, and the like,
What is necessary is just to set the mounting position and mounting direction of the engaging convex part and the engaging concave part. For example, in a case where the engaging protrusion is formed upward or downward on the side plate of the capacitor core,
A bracket (360) as shown in FIG. 11 may be used. The bracket (360) is provided with an engaging projection (262).
Is formed on the outer surface of the intermediate wall of the bracket main body (261) only in the bracket (260) shown in FIG.
Is different. If this bracket (360) is used, the engaging projections (262) can be provided upward or downward on the upper and lower side plates of the capacitor core.

[0048]

As described above, according to the integrated heat exchanger of the present invention, the resin bracket having one engagement means made of synthetic resin is attached to the first heat exchanger core,
The first heat exchanger core is connected to the second heat exchanger core by providing the other engaging means made of synthetic resin on the second heat exchanger core and engaging the one and the other engaging means. Therefore, the two cores can be easily connected by the concave-convex engagement of the engagement means. In addition, since the engagement protrusions made of synthetic resin are engaged with the engagement recesses to connect the two cores, play and clearance between the engagement protrusions and the recesses, as well as bending deformation of the resin itself, etc. Since the assembly error between the two cores can be reliably absorbed, the two cores can be reliably connected. Further, since the mounting error such as a tolerance can be absorbed by the engagement means, there is no need to use an assembly error absorbing member such as a vibration isolating rubber, and the number of parts can be reduced accordingly.

Further, the present invention is particularly useful as an integrated heat exchanger for automobiles where the mounting space is strictly restricted. There is an advantage that it can be mounted accurately.

Further, in the present invention, when the bracket for connecting the core is attached to the side plate or the header of the capacitor core, there is an advantage that the bracket can be securely attached without adversely affecting the capacitor core.

Further, in the present invention, when the other engaging means is formed integrally with the resin tank of the radiator core, the work for attaching the engaging means to the radiator core can be omitted, and the core can be further improved. There is an advantage that the connecting operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an integrated heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a rear view showing a condenser core in the integrated heat exchanger of the first embodiment.

FIG. 3 is an exploded perspective view showing the vicinity of a bracket in the integrated heat exchanger of the first embodiment.

FIG. 4 is an exploded cross-sectional view showing the vicinity of an engaging portion in the integrated heat exchanger of the first embodiment.

FIG. 5 is a cross-sectional view showing the vicinity of an engaging portion in the integrated heat exchanger of the first embodiment.

FIG. 6 is a rear view showing the vicinity of a bracket of a condenser core in an integrated heat exchanger according to a second embodiment of the present invention.

FIG. 7 is an exploded cross-sectional view showing the vicinity of an engaging portion in an integrated heat exchanger of a second embodiment.

FIG. 8 is a cross-sectional view showing the vicinity of an engaging portion in the integrated heat exchanger of the second embodiment.

FIG. 9 is a view showing a bracket applied to the integrated heat exchanger of the second embodiment, wherein FIG. 9A is a plan view in a closed state, and FIG. 9B is a plan view in an open state. FIG.

FIG. 10 is an exploded perspective view showing the vicinity of a bracket of a condenser core in an integrated heat exchanger according to a third embodiment of the present invention.

FIG. 11 is a perspective view showing a bracket applicable as a modification of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Radiator core 11 ... Upper tank 12 ... Lower tank 20 ... Condenser core 21 ... Header 23 ... Flat tube (heat exchange tube) 30 ... Side plate 50, 162, 262 ... Engagement convex part 60, 160, 260, 360 ... Bracket 62, 150: engaging cylinder (engaging concave part) 150: engaging cylinder (engaging concave part)

Claims (5)

[Claims] 1. An integrated heat exchanger in which a panel-shaped first heat exchanger core is connected so as to overlap a panel-shaped second heat exchanger core. A synthetic resin bracket is provided, and either one of a synthetic resin engaging protrusion and a synthetic resin engaging concave is provided on the bracket, and the other engaging means is provided on the second engaging means. The first heat exchanger core is provided on the heat exchanger core, and the first engagement means is engaged with the other engagement means, whereby the first heat exchanger core is connected and fixed to the second heat exchanger core. An integrated heat exchanger. 2. A plurality of heat exchange tubes, both ends of which are connected to both headers, are arranged in parallel between the pair of headers, and the first heat exchanger core is arranged outside the outermost heat exchange tubes. The first heat exchanger core is constituted by a radiator core having a synthetic resin upper tank provided at an upper end and a synthetic resin lower tank provided at a lower end. The integrated heat exchanger according to claim 1. 3. The integrated heat exchanger according to claim 2, wherein said one engagement means is formed integrally with said bracket, and said bracket is attached to said side plate. 4. The integrated heat exchanger according to claim 2, wherein said one engagement means is formed integrally with said bracket, and said bracket is attached to said header. 5. The integrated heat exchanger according to claim 2, wherein the other engagement means is formed integrally with at least one of the upper tank and the lower tank.