JP2007216919A - Vehicular heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular heat exchanger capable of fixing ends of both heat exchangers to each other without using a bolt, while allowing dimension change by an error of part single body accuracy and assembling accuracy and heat expansion/contraction in a vehicle width direction of both heat exchangers. <P>SOLUTION: In the vehicular heat exchanger A, in the state in which an integral type heat exchanger 1 and a sub-radiator 2 are arranged in a vehicle longitudinal direction, the mutual ends of the both are fixed through upper brackets 20a, 20b. The upper brackets 20a, 20b are fixed to fixed parts 10a, 10b of the sub-radiator 2 in such a state that they can be relatively moved in a longitudinal direction of core parts 2a, 3a, 4a of the integral type heat exchanger 1 and the sub-radiator 2 by a clearance W1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle heat exchanger.

Conventionally, the technology of a vehicle heat exchanger in which the ends of both the first heat exchanger and the second heat exchanger are fixed together via a bracket in a state where the first heat exchanger and the second heat exchanger are arranged in the vehicle front-rear direction has become publicly known. (See Patent Document 1).
JP 2002-1114025 A

  However, in the conventional invention, it is difficult to fix the end portions of the first heat exchanger and the second heat exchanger satisfactorily due to errors in component accuracy and assembly accuracy at the time of manufacture. It was.

In addition, both heat exchangers are restrained more than necessary due to dimensional changes due to thermal expansion and contraction during use of the first heat exchanger and the second heat exchanger, and there is a possibility that the tube and the like are cracked and broken.
In addition, it is thought that such a problem originates in the core part of a 1st heat exchanger and a 2nd heat exchanger being greatly thermally expanded / contracted to a longitudinal direction at the time of the manufacture or use.

  The present invention has been made to solve the above-described problems, and the object of the present invention is to provide errors in component accuracy and assembly accuracy in the longitudinal direction of the core portions of the first heat exchanger and the second heat exchanger. Another object of the present invention is to provide a vehicle heat exchanger that can tolerate dimensional changes due to thermal expansion and contraction.

  According to the first aspect of the present invention, in a state in which the first heat exchanger and the second heat exchanger are arranged in the vehicle front-rear direction, both ends thereof are fixed together via a bracket. In the heat exchanger, the longitudinal direction of the core portion of the first heat exchanger or the core portion of the second heat exchanger with respect to the bracket at the end portion of the first heat exchanger or the end portion of the second heat exchanger It is characterized in that it is fixed in a state where it can be relatively moved by a predetermined distance.

  In the first aspect of the present invention, in a state where the first heat exchanger and the second heat exchanger are arranged in the vehicle front-rear direction, the ends of both are fixed together via a bracket. In the vehicle heat exchanger, the end of the first heat exchanger or the end of the second heat exchanger with respect to the bracket, the core of the first heat exchanger or the core of the second heat exchanger Because it is fixed in the longitudinal direction so that it can be moved relative to the longitudinal direction by a predetermined distance, the dimensional change due to errors in the individual component accuracy and assembly accuracy in the longitudinal direction of the core portion of the first heat exchanger and the second heat exchanger, and thermal expansion / contraction Is acceptable.

  Embodiments of the present invention will be described below with reference to the drawings.

Example 1 will be described below.
In the first embodiment, a case will be described in which the first heat exchanger is applied to an integrated heat exchanger in which a radiator and a condenser are integrally fixed, and the second heat exchanger is applied to a sub-radiator. Further, the vehicle front-rear direction and the vehicle width direction will be described as the front-rear direction and the left-right direction.

1 is an exploded perspective view of a vehicle heat exchanger according to a first embodiment of the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a diagram illustrating a core portion of the integrated heat exchanger, and FIG. 4 is an integrated heat exchange. FIG. 5 is a front view of the sub-radiator. FIG.
6 is a perspective view for explaining the end of the sub-radiator, FIG. 7 is a perspective view of the upper bracket, FIG. 8 is a sectional view taken along line S8-S8 in FIG. 7, and FIG. 9 is a sectional view taken along line S9-S9 in FIG. 10 and 11 are diagrams for explaining fixing of the integrated heat exchanger and the sub-radiator.

First, the overall configuration will be described.
As shown in FIGS. 1 and 2, the vehicle heat exchanger A of the first embodiment includes an integrated heat exchanger 1 (corresponding to a first heat exchanger) and a sub-radiator 2 (corresponding to a second heat exchanger). Is provided.

As shown in FIG. 3, the integrated heat exchanger 1 employs a so-called integrated heat exchanger 1 in which a main radiator 3 and a condenser 4 in front of the main radiator 3 are integrally fixed.
The main radiator 3 employs a so-called parallel flow type radiator in which a pair of tanks 3b and 3c are disposed on the left and right sides of the core portion 3a.
The core portion 3a of the main radiator 3 is adjacent to a plurality of tubes 3d whose entire left and right ends are inserted into and fixed to the corresponding tanks 3b and 3c, respectively, in addition to being formed longer in the left-right direction than in the vertical direction. It arrange | positions between the tubes 3d to perform, and is comprised by the wavy fin 5 shared with the core part 4a of the capacitor | condenser 4 mentioned later.
In addition, an input port P1 is provided on the upper rear surface of the tank 3b, while an output port P2 is provided on the lower rear surface of the tank 3c.

The capacitor 4 includes a pair of tanks 4b and 4c on both the left and right sides of the core portion 4a.
Further, the core part 4a of the capacitor 4 is formed so as to be longer in the left-right direction as compared with the vertical direction, and is formed to have substantially the same length as the core part 3 of the radiator 3. The plurality of tubes 4d inserted and fixed in the tanks 4b and 4c to be fixed, and the fin 5 disposed between the adjacent tubes.
Further, as shown in FIG. 4, the tanks 4b and 4c of the capacitor 4 are internally divided into chambers R1 to R4 by a partition plate S1, and the tank 4b includes a connector 4e communicating with R1, and a chamber 4 On the other hand, the tank 4c is provided with a receiver tank 4i that is connected to both the chamber R2 and the chamber R3 via connection pipes 4g and 4h.

  A pair of reinforcements 6 and 7 are inserted into and fixed to the upper and lower ends of the tanks 3b and 3c of the main radiator 3 and the tanks 4b and 4c of the condenser 4 so that they are integrally connected and fixed. ing.

As shown in FIG. 5, the sub-radiator 2 employs a so-called parallel flow type radiator in which a pair of resin tanks 2b and 2c are arranged on both the left and right sides of the core 2a.
The core portion 2a of the sub-radiator 2 includes a plurality of tubes 2d inserted into and fixed to resin tanks 2b and 2c corresponding to both ends via corresponding tube plates 8a and 8b, and adjacent tubes 2d. It is comprised by the wavy fin 2e arrange | positioned between.
A pair of reinforcements 9a and 9b are inserted and fixed to the upper and lower ends of the tanks 2b and 2c of the sub-radiator 2, so that both of them are integrally connected and fixed.

Further, as shown in FIGS. 1 and 6, substantially flat plate-like fixing portions 10a and 10b projecting upward are formed integrally with the corresponding tanks 2b and 2c, respectively, on the upper portions of the tanks 2b and 2c of the sub-radiator 2. In addition, these fixing portions 10a and 10b are provided with a pair of locking portions 11a and 11b in the front-rear direction and are formed in a substantially arrow cross-sectional shape.
On the other hand, below the tanks 2b and 2c of the sub-radiator 2, cylindrical pins 12 protruding downward are integrally formed with the corresponding tanks 2b and 2c, respectively.
An input port P3 is provided on the upper side surface of the tank 2c, while an output port P4 is provided on the lower side surface of the tank 2b.

  In addition, all the constituent members of the integrated heat exchanger 1 are made of aluminum, and a clad layer (brazing sheet) made of a brazing material is provided on at least one side of the joint portions of the constituent members. After being temporarily assembled, they are integrally brazed and fixed by heat treatment in a heating furnace (not shown).

  In the sub-radiator 2, all the constituent members except the tanks 2 b and 2 c are made of aluminum, and a clad layer (brazing sheet) made of a brazing material is provided on at least one side of the joints of the constituent members. These are preliminarily assembled and heat-treated in a non-illustrated heating furnace to be integrally brazed and fixed, and then the corresponding tank plates 2b and 2c are mounted on the tube plates 8a and 8b, respectively. .

  As shown in FIGS. 1 and 2, the upper and lower left and right ends of the integrated heat exchanger 1 and the sub-radiator 2 are fixed together via upper brackets 20a and 20b and lower brackets 30a and 30b, which will be described later.

As shown in FIGS. 7 to 9, the upper bracket 20a is made of resin and is integrally formed, and the bottom surface of the upper bracket 20a is rectangular in a size that can be fixed on the outer periphery of the tank 3b of the main radiator 3 from above. The opening 21 is formed downward.
Further, on the inner side of the upper bracket 20a, a length L2 (see FIG. 9) longer than the length L1 (see FIG. 6) of the corresponding fixing portions 10a, 10b of the sub-radiator 2 in the vehicle width direction. The extending groove 22 is formed in a state opened downward.
In addition, the groove 22 includes inclined tapered grooves 23 and 24 that taper upward from the opened lower side, and continuous rectangular rectangular grooves 27 that form the tapered grooves 23 and 24 and step portions 25 and 26. It is provided with a substantially keyhole cross-sectional shape.
Further, a columnar vehicle mounting pin 28 protruding upward is provided integrally with the upper bracket 20a on the upper surface of the upper bracket 20a.
Since the upper bracket 20b is symmetrical to the upper bracket 20a, the same reference numerals are given and description thereof is omitted.

As shown in FIG. 1, each of the lower brackets 30a is integrally formed of a resin, and an opening 31 having a size that can be fixed by press-fitting the tank 3b of the main radiator 3 is provided on the rear side. The front side thereof extends obliquely forward to form a flat support surface 32.
Further, the support surface 32 is formed with an insertion hole 33 (see FIG. 10A) opened in the vertical direction, and the insertion hole 33 is a substantially cylindrical mounting member made of an elastic material such as rubber. 34 is inserted and fixed.

Further, a columnar vehicle mounting pin 35 protruding downward is provided integrally with the lower bracket 30a on the bottom surface of the lower bracket 30a.
Since the lower bracket 30b is symmetrical with the lower bracket 30a, the same reference numerals are given and the description thereof is omitted.

Next, the operation will be described.
When fixing the integrated heat exchanger 1 and the sub-radiator 2 configured as described above, first, at the left and right lower ends of the integrated heat exchanger 1, the tanks 3b and 3c of the main radiator 3 respectively correspond to lower portions. After press-fitting into the openings 31 of the brackets 30a and 30b and fixing both of them, the pin 12 of the sub-radiator 2 is inserted and fixed into the insertion hole 33 from above via the mount member 34 as shown in FIG. The left and right lower ends of the integrated heat exchanger 1 and the sub radiator 2 are fixed via lower brackets 30a and 30b.

Next, as shown in FIG. 11, at the left and right upper ends of the integrated heat exchanger 1 and the sub-radiator 2, the openings 21 of the upper brackets 20 a and 20 b are formed on the outer peripheries of the corresponding tanks 3 b and 3 c of the main radiator 3. When the fixing portions 10a and 10b of the sub radiator 2 are pressed into the groove 22 at the same time as being fixed from above, the tips of the fixing portions 10a and 10b are elastically deformed along the tapered grooves 23 and 24 of the groove 22 After the relative movement to enter the rectangular groove 27, the locking portions 11a and 11b are locked to the step portions 25 and 26, so that the left and right upper ends of the integrated heat exchanger 1 and the sub radiator 2 are connected to the upper bracket. It fixes through 20a, 20b.
At this time, since the length L2 of the groove 22 is longer than the length L1 of the fixing portions 10a and 10b, a predetermined gap W1 is formed between the deepest portion of the groove 22 and the tips of the fixing portions 10a and 10b. Is formed. In addition, about the value of the clearance gap W1, it can set suitably.

  Therefore, in the vehicle heat exchanger A of the first embodiment, the left and right lower end portions of the sub-radiator 2 are elastically fixed to the left and right lower end portions of the integrated heat exchanger 1 by the lower brackets 30a and 30b via the mount member 34. On the other hand, the left and right upper end portions of the sub radiator 2 are fixed to the left and right upper end portions of the integrated heat exchanger 1 in a state in which the sub radiator 2 can be relatively moved by the gap W1 in the left and right directions via the upper brackets 20a and 20b.

  Here, as in the case of the vehicle heat exchanger A of the first embodiment, the sub-radiator 2, the main radiator 3, and the core portions 2a, 3a, 4a of the condenser 4 are longer in the left-right direction than in the up-down direction. At the time of brazing, the cores 2a, 3a, 4a are mainly thermally expanded and contracted in the longitudinal direction (also the longitudinal direction of the tubes 2d, 3d, 4d). As a result, the integrated heat exchanger 1 and sub-radiator 2 Errors in the accuracy of individual parts and assembly accuracy in the left-right direction will increase.

In contrast, in the vehicle heat exchanger A according to the first embodiment, the left and right upper end portions of the sub-radiator 2 can be moved relative to each other in the left-right direction via the upper brackets 20a, 20b in an integrated heat exchanger. Since these are fixed to the left and right upper end portions of the single heat exchanger 1 and the sub-radiator 2, both of them can be easily fixed while allowing an error in the accuracy of individual parts and assembly accuracy in the left-right direction.
Further, since the upper brackets 20a and 20b are made of resin, fastening means such as bolts are not required, and the number of parts and the number of assembly steps can be reduced.

  In addition, since the left and right lower end portions of the sub-radiator 2 are elastically fixed to the left and right lower end portions of the integrated heat exchanger 1 by the lower brackets 30a and 30b via the mount member 34, they are not firmly restrained. There is no problem in allowing an error in assembly accuracy.

  The vehicle heat exchanger A is mounted on the main radiator 3 core support for fixing the vehicle heat exchanger A with the fan (not shown) mounted on the rear side and the mounting pins 28 and 35 fixed to the vehicle heat exchanger A. It is mounted on the vehicle in a fixed state via a mounting member or the like.

The main radiator 3 is connected to, for example, a cooling circuit for cooling the fuel cell. At that time, a flow medium of about 80 ° C. flowing into the tank 3b from the input port P1 flows through each tube 3d of the core portion 3a. After being cooled to about 40 ° C. by heat exchange with vehicle running wind passing through the core portion 3a or forced wind by a fan, the radiator flows into the tank 3c and is discharged from the output port P2. Function as.
Alternatively, in the case of a so-called hybrid vehicle in which the vehicle is driven by an engine and a motor, the main radiator 3 is connected to a circuit that cools the engine coolant.

  The condenser 2 is connected to a cooling circuit for an air conditioner. At this time, a circulation medium of about 70 ° C. flowing into the chamber R1 of the tank 4b from the compressor side (not shown) through the connector 4e of the condenser 4 is connected to the core portion 4a. While flowing through the tubes 4d corresponding to the chambers R1 and R2, heat exchange is performed with vehicle traveling wind passing through the core portion 12a or forced wind by a fan, and then flows into the chamber R2 of the tank 4c.

  Next, the flow medium in the chamber R2 is gas-liquid separated in the receiver tank 4i through the connection pipe 4g, and then only the liquid flow medium flows into the chamber R3 of the tank 4c through the connection pipe 4h. While circulating through the tubes 4d corresponding to the chambers R3 and R4, heat is exchanged with vehicle running wind passing through the core portion 4a or forced wind by the fan, so that the tank 4b is subcooled to about 45 ° C. It flows into chamber R4.

  Finally, the distribution medium in the chamber R4 functions as a capacitor by being discharged to the evaporator side outside the figure through the connecting pipe 4f and the connector 4e.

  The sub-radiator 2 is connected to a cooling circuit for cooling a motor, a circuit, and the like. At that time, a flow medium of about 60 ° C. flowing into the tank 2c from the input port P3 flows through each tube 2d of the core portion 2a. After being cooled to about 40 ° C. by heat exchange with vehicle traveling wind passing through the core portion 2a or forced wind by the fan, the sub-flow is discharged into the tank 2b and discharged from the output port P4. Functions as a radiator.

Here, as in the case of the vehicle heat exchanger A of the first embodiment, the sub-radiator 2, the main radiator 3, and the core portions 2a, 3a, 4a of the condenser 4 are longer in the left-right direction than in the up-down direction. Due to the difference in thermal expansion between the tubes 2d, 3d, and 4d during use, the cores 2a, 3a, and 4a are thermally expanded and contracted mainly in the longitudinal direction (also in the longitudinal direction of the tubes 2d, 3d, and 4d), As a result, the dimensional change due to the thermal expansion / contraction of the integrated heat exchanger 1 and the sub-radiator 2 in the left-right direction becomes large.
Further, the portions near the input ports P1 and P3 through which the high-temperature flow medium flows, that is, the left and right end portions in the upper part of the integrated heat exchanger 1 and the sub-radiator 2, have the largest dimensional change due to thermal expansion / contraction.

  On the other hand, in the vehicle heat exchanger A of the first embodiment, the integrated heat exchange is performed in such a manner that the left and right upper ends of the sub-radiator 2 can be relatively moved by the gap W1 in the vehicle width direction via the upper bracket. Since it is fixed to the left and right upper end portions of the container 1, dimensional changes due to thermal expansion / contraction of both of them can be allowed.

  In addition, since the left and right lower end portions of the sub radiator 2 are elastically fixed to the left and right lower end portions of the integrated heat exchanger 1 by the lower brackets 30a and 30b via the mount member 34, they are not firmly restrained. There is no problem in allowing dimensional changes due to expansion / contraction.

Next, the effect will be described.
As described above, in the vehicle heat exchanger A according to the first embodiment, the ends of both of the integrated heat exchanger 1 and the sub-radiator 2 are arranged in the vehicle front-rear direction. In the vehicle heat exchanger A fixed together via the upper brackets 20a, 20b, the upper brackets 20a, 20b are connected to the upper brackets 20a, 20b with respect to the integrated heat exchanger 1 and the core portion 2a of the sub-radiator 2. , 3a, 4a are fixed so that they can move relative to each other in the longitudinal direction by a gap W1. And dimensional changes due to thermal expansion and contraction are acceptable.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.
For example, in the first embodiment, the first heat exchanger is applied to the integrated heat exchanger 1 in which the main radiator 3 and the condenser 4 are integrally fixed, and the second heat exchanger is applied to the sub-radiator 2. Although explained, the kind of heat exchanger can be set up suitably and is not this limitation.

It is a disassembled perspective view of the heat exchanger for vehicles of Example 1 of the present invention. It is a perspective view of the heat exchanger for vehicles of Example 1 of the present invention. It is a figure explaining the core part of an integrated heat exchanger. It is a front view of an integrated heat exchanger (lower bracket is omitted). It is a front view of a sub radiator. It is a perspective view explaining the edge part of a sub radiator. It is a perspective view of an upper bracket. It is sectional drawing in the S8-S8 line | wire of FIG. It is sectional drawing in the S9-S9 line | wire of FIG. It is a figure explaining fixation of an integrated heat exchanger and a sub radiator. It is a figure explaining fixation of an integrated heat exchanger and a sub radiator.

Explanation of symbols

A Vehicle heat exchangers P1, P2, P3, P4 Input ports R1, R2, R3, R4 Chamber 1 Integrated heat exchanger 2 Sub-radiators 2a, 3a, 4a Core portions 2b, 2c, 3b, 3c, 4b, 4c Tank 2d, 3d, 4d Tube 3 Main radiator 4 Capacitor 4e Connector 4f, 4g, 4h Connection pipe 4i Receiver tank 5, 2e Fins 6, 7, 9a, 9b Reinforce 8a, 8b Tube plates 10a, 10b Fixing portions 11a, 11b Locking part 12 Pin 20a, 20b Upper bracket 21 Opening part 22 Groove 23, 24 Tapered groove 25, 26 Step part 27 Rectangular groove 28, 35 Vehicle mounting pins 30a, 30b Lower bracket 31 Opening part 32 Support surface 33 Insertion hole 34 Mount Element

Claims (1)

In the vehicle heat exchanger in which the first heat exchanger and the second heat exchanger are arranged in the vehicle front-rear direction, and both end portions thereof are fixed together via a bracket,
The end of the first heat exchanger or the end of the second heat exchanger is relative to the bracket by a predetermined distance in the longitudinal direction of the core of the first heat exchanger or the core of the second heat exchanger. A vehicle heat exchanger fixed in a movable state.

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