JP2010007629A - Heat exchanger for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger for a vehicle capable of avoiding harmful influence due to temperature difference between itself and an adjacent heat exchanger, and prevent the cooling performance from being lowered. <P>SOLUTION: A heat exchanger for a vehicle includes an inter cooler 3 and a condenser 4 arranged in parallel to air flow, and a heat shield plate 5 is provided between the inter cooler 3 and the condenser 4 adjacent to each other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle heat exchanger.

Conventionally, the technique of the vehicle heat exchanger provided with the some heat exchanger arrange | positioned in parallel with respect to an airflow is known (refer patent document 1).
JP 2004-132564 A

However, in the conventional invention, there is a problem that the temperature difference between adjacent heat exchangers adversely affects each other and causes a decrease in cooling performance.
In particular, since the temperature of the gas introduced into the intercooler in recent years is set to a particularly high temperature, the heat exchanger adjacent to the intercooler is easily affected by hot air.

  The present invention has been made in order to solve the above-mentioned problems, and the object of the present invention is to prevent the adverse effect caused by the temperature difference between adjacent heat exchangers and prevent the cooling performance from deteriorating. Is to provide an exchanger.

  In invention of Claim 1, in the vehicle heat exchanger provided with the several heat exchanger arrange | positioned in parallel with respect to the airflow, the heat-shielding board was provided between the said adjacent heat exchangers, It is characterized by the above-mentioned. And

In invention of Claim 1, the heat shield is provided between adjacent heat exchangers.
Thereby, the bad influence resulting from the temperature difference between adjacent heat exchangers can be prevented, and the fall of cooling performance can be prevented.

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

Example 1 will be described below.
The vehicle front-rear direction and the vehicle width direction will be described as the front-rear direction and the vertical direction.
FIG. 1 is an overall front view showing a heat exchanger module in which the vehicle heat exchanger of Example 1 is adopted, and FIG. 2 is a cross-sectional view (partially omitted) taken along line S2-S2 of FIG.

3 is a perspective view of the radiator of the first embodiment, FIG. 4 is a perspective view of the capacitor of the first embodiment, FIG. 5 is a front view of the capacitor of the first embodiment, and FIG. 6 is a perspective view of the intercooler of the first embodiment. 7 is a perspective view of the radiator core support of Embodiment 1. FIG.
FIG. 8 is a perspective view for explaining the attachment state of the radiator core support and the heat shield plate of the first embodiment, FIG. 9 is a perspective view of the heat shield plate of the first embodiment, and FIG. 10 is a part of the heat shield plate of the first embodiment. FIG. 11 is a diagram illustrating an engine cooling circuit and a turbocharger gas circuit according to the first embodiment.

First, the overall configuration will be described.
As shown in FIGS. 1 and 2, in the vehicle heat exchanger of the first embodiment, a radiator 1, a condenser 2 (corresponding to a heat exchanger in claims), and an intercooler 3 (corresponding to a heat exchanger in claims). Is mounted on the radiator core support 4.

First, the radiator 1 will be described in detail.
As shown in FIG. 3, the radiator 1 includes a pair of an upstream tank 1a and a downstream tank 1b arranged at predetermined intervals on the left and right sides, and a core portion 1c arranged between the tanks 1a and 1b. A so-called cross flow type radiator is employed.

Each tank 1a, 1b is made of resin and is formed in a substantially container shape, and its opening side peripheral edge is fixed by crimping to the corresponding tube plate 1d, 1e via a seal member (not shown), and the inside is It is sealed.
In addition, a cylindrical input pipe 1f projects rearward from the upper part of the upstream tank 1a in a state of communicating with the upstream tank 1a, while the downstream tank 1b is provided at the lower part of the downstream tank 1b. A cylindrical output pipe 1g is protruded in a state where it communicates with the pipe.
Also, fixing portions 1h and 1i for fixing and supporting the capacitor 2 are provided on the upper front surface and the lower front surface of the tanks 1a and 1b, respectively, as in the known Japanese Patent Application Laid-Open No. 2007-216749.

A columnar vehicle mounting pin 1j projects upward from the upper end of each tank 1a, 1b.
Although not shown in part, a locking bracket portion 1k protruding rearward is provided in the middle of each tank 1a, 1b.

The core portion 1c is composed of a plurality of flat tubular tubes 1o whose both end portions are inserted and fixed to the tube plates 1d and 1e, and corrugated plate-like fins 1p having corrugated top portions joined to the adjacent tubes 1o. ing.
Further, both sides in the stacking direction of the tube 1o and the fin 1p of the core portion 1c are connected and reinforced by a pair of reinforcements 1q and 1r whose both ends are inserted and fixed to the tube plates 1d and 1e.
In addition, each constituent member of the core portion 1c including the tube plates 1d and 1e and the reinforcements 1q and 1r is made of aluminum, and at least one of these joint portions includes a clad layer (brazing sheet) made of a brazing material. These are preliminarily assembled and then brazed and joined together by heat treatment in a heating furnace.

Next, the capacitor 2 will be described in detail.
As shown in FIG. 4, the capacitor 2 includes a pair of header tanks 2a and 2b arranged at a predetermined interval on the left and right sides, and a core portion 2c arranged between the tanks 2a and 2b. .

As shown in FIG. 5, the inside of the header tank 2a is divided into three chambers R1, R3, and R6 by four divide plates D1, and an input port (not shown) connected to the chamber R1 at the upper portion thereof. An input connector 2d having an output port (not shown) connected to the chamber R6 is provided at the lower portion.
The interior of the header tank 2b is divided into three chambers R2, R4, R5 by four divide plates D2, and a cylindrical receiver tank 2g connected to the chambers R4, R5 through the adapter 2f. Is provided.

The core portion 2c is composed of a plurality of flat tubular tubes 2h whose both ends are inserted and fixed in the header tanks 2a and 2b, and corrugated plate-like fins 2i whose corrugated tops are joined to the adjacent tubes 2h. ing.
Further, both ends of the tube 2h and the fin 2i in the core portion 2c in the stacking direction are connected and reinforced by a pair of reinforcements 2j and 2k whose both end portions are inserted and fixed in the header tanks 2a and 2b.
The constituent members of the capacitor 2 are all made of aluminum, and at least one of these joints is provided with a clad layer (brazing sheet) made of a brazing material, and after these are temporarily assembled, They are integrally brazed and joined by heat treatment in a heating furnace.
The internal structure of the receiver tank 2g is not limited to this, and is accommodated after heat treatment depending on the structure.

  In addition, the core size of the core portion 1c of the capacitor 2 is set to be smaller in the vertical direction and the left-right direction than the core size of the core portion 1c of the radiator 1.

Next, the intercooler 3 will be described in detail.
As shown in FIG. 6, the intercooler 3 includes a pair of an upstream tank 3a and a downstream tank 3b disposed at a predetermined interval on the left and right sides, and a core portion 3c disposed between the tanks 3a and 3b. Is provided.

Each tank 3a, 3b is made of aluminum (or resin) in a substantially container shape, and its opening side peripheral edge is fixed by caulking to a corresponding tube plate 3d, 3e via a seal member (not shown). The inside is sealed.
On the rear surface of the upstream tank 3a, a cylindrical input pipe 3f projects rearward in communication with the upstream tank 3a, while the downstream surface of the downstream tank 3b communicates with the downstream tank 3b. In this state, a cylindrical output pipe 3g protrudes rearward.
A cylindrical vehicle mounting pin 3h projects downward from the bottom surfaces of both tanks 3a and 3b.

The core portion 3c is composed of a plurality of flat tubular tubes 3i whose both end portions are inserted and fixed to the tube plates 3d and 3e, and corrugated fins 3j having corrugated top portions joined to the adjacent tubes 3i. ing.
In addition, each component of the core portion 3c including at least the tube plates 3d and 3e is made of aluminum, and at least one of these joint portions is provided with a clad layer (brazing sheet) made of a brazing material, These are preliminarily assembled and then brazed and joined together by heat treatment in a heating furnace.
Note that the fin 3j may be omitted. Furthermore, an inner fin may be provided inside the tube 3i.

  In addition, the core size of the core portion 3c of the intercooler 3 is set smaller than the core size of the core portions 1c and 2c of the radiator 1 and the capacitor 2 in the vertical direction and larger in the left-right direction.

Next, the radiator core support 4 will be described in detail.
As shown in FIG. 7, the radiator core support 4 is integrally formed in a substantially box shape made of resin and opened to the front side of the vehicle.
A pair of circular fan openings 4c and 4d are formed in the shroud wall 4a on the rear surface of the radiator core support 4 so that the fan 4b is mounted in a desired state.
Below the fan openings 4c and 4d, there are provided flaps 4e that maintain a closed state by their own weight and are opened in the front-rear direction by the air flow.
It should be noted that the number of fans 4b and the flaps 4e, the installation positions, and the like can be set as appropriate.

Although not shown in the drawing, circular radiator insertion holes 4f and a radiator fixing portion 4g projecting in a rectangular shape forward are formed on the left and right sides of the shroud wall 4a.
In addition, circular intercooler insertion holes 4h are formed on the left and right lower sides of the shroud wall 4a.

Further, a circular radiator fixing hole 4j is formed on the upper surface i of the radiator core support 4 so as to be separated from the left and right.
Further, a circular intercooler fixing hole 4m is formed on the lower surface 4k of the radiator core support 4 so as to be separated from each other in the left-right direction.

On the opposing side wall 4n of the radiator core support 4, a pair of upper and lower plate-like locking pieces 4o and 4p are formed so as to protrude inward.
Then, as shown in FIG. 8, both end portions of the plate-like heat shield 5 can be inserted from the front side between the engaging pieces 4o, 4p of the opposing side wall 4n of the radiator core support 4 so as to be fitted and fixed. It has become.

As shown in FIGS. 9 and 10, the heat shield plate 5 is made of resin and is integrally formed in a flat plate shape, and the skin portions 5a and 5b are arranged between the upper and lower flat skin portions 5a and 5b. A hollow structure is employed in which a plurality of pillar portions 5c that are connected in a straight line and through passages 5d that are formed to penetrate in the front-rear direction are alternately arranged.
It should be noted that the thicknesses and intervals of the skin portions 5a and 5b and the column portions 5c can be set as appropriate. Moreover, you may make the cross-sectional shape of the penetration path 5d into various shapes according to the shape and arrangement | positioning of the pillar part 5c.

  In addition, the dimension of the length in the front-rear direction of the heat shield 5 is set to be larger than at least the core portion 3c of the intercooler 3.

Next, mounting of a radiator, a capacitor, and an intercooler in the radiator core support will be described.
As shown in FIGS. 1 and 2, a fan 4b is mounted in each of the fan openings 4c and 4d of the radiator core support 4 configured as described above.

In the radiator 1, the vehicle mounting pins 1 j are fixedly supported to the corresponding radiator fixing holes 4 j of the radiator core support 4 through the cylindrical mounting rubber M 1 at the front position of the fan 4 b, and each locking bracket is mounted. A part of the part 1n is mounted in a state of being supported by the corresponding radiator fixing part 4g.
At this time, the input pipe 1f and the output pipe 1g of the radiator 1 are disposed through the radiator insertion holes 4f of the shroud wall 4a.

  The condenser 2 is disposed in front of the radiator 1 and above the heat shield plate 5 at the upper, lower, left and right ends of the radiator 1 via resin brackets B1 to B4 as in the known Japanese Patent Application Laid-Open No. 2007-216749. It is mounted in a state of being fixed to the corresponding fixing portions 1h and 1i.

The intercooler 3 is configured so that each vehicle mounting pin 3h is inserted into a corresponding intercooler fixing hole 4m of the radiator core support 4 via a cylindrical mounting rubber M2 in front of the radiator 1 and below the heat shield plate 5. It is mounted in a fixed and supported state.
At this time, the input pipe 1f and the output pipe 1g of the intercooler 3 are disposed through the corresponding intercooler insertion holes 4h of the shroud wall 4a.
A bracket (not shown) may be provided on the upper portion of the intercooler 3 and fixed to the peripheral member.

  Thereby, the heat shield 5 is interposed between the condenser 2 and the intercooler 3 so as to partition the two, and the rear end thereof is disposed at a position close to the core portion 1 c of the radiator 1. .

Next, the operation will be described.
A radiator core support 4 on which such a radiator 1, a condenser 2, an intercooler 3, and the like are mounted is mounted in a vehicle engine room as a heat exchanger module.

<Operation of radiator>
As shown in FIG. 11, the radiator 1 is used as a component of the engine cooling circuit C1.
Specifically, the engine 9 is an engine with a so-called turbocharger. In the engine cooling circuit C1, high-temperature engine cooling water around 80 ° C. discharged from a water jacket (not shown) of the engine 9 is first connected to a connecting pipe. It is introduced into the radiator 1 through 10a.

As shown in FIG. 3, the high-temperature engine coolant of about 80 ° C. flowing into the upstream tank 1a from the connecting pipe 10a through the input pipe 1f of the radiator 1 passes through the tubes 1o of the core portion 1c and is downstream. It is cooled to around 60 ° C. by exchanging heat with the vehicle running wind that passes through the core portion 1c while flowing into the side tank 1b or the forced wind by the fan (illustrated by the broken arrow in FIG. 2, corresponding to the airflow in the claims). The
Next, the engine cooling water flowing into the downstream tank 1b is discharged from the output pipe 1g, and then again to the engine 9 via the thermostat 11 and the pump 12 via the connection pipes 10b to 10d shown in FIG. Returned and circulated.

  Further, while the temperature of the engine cooling water is low, the thermostat 11 is closed so that the entire amount of the engine cooling water flows from the connecting pipe 10a to the connecting pipe 10e for bypass and bypasses the radiator 1 to the engine 9. Circulate between them.

<Intercooler operation>
The intercooler 3 is used as a component of the turbocharger gas circuit C2.
In the turbocharger gas circuit C2, the intake air introduced from an air cleaner (not shown) is first introduced into the compressor 13a of the turbocharger 13 through the connecting pipe 10f, and is pressurized and heated to 180 ° C. to 200 ° C.
Next, the intake air pressurized and heated by the compressor 13a is introduced into the intercooler 3 through the connecting pipe 10g.

  As shown in FIG. 6, a part of the intake air that has flowed into the upstream tank 3a from the connecting pipe 10g via the input pipe 3f of the intercooler 3 is transferred to the downstream tank 3b via the tubes 3i of the core portion 3c. The air is cooled to around 60 ° C. by exchanging heat with the vehicle running wind passing through the core portion 3c during the inflow or the forced wind of the fan (illustrated by the broken arrow in FIG. 2, corresponding to the air flow in the claims).

Next, the intake air in the downstream tank 1b is discharged from the output pipe 3g and then supplied to an intake port (not shown) of the engine 9 through a connecting pipe 10h (intake manifold) shown in FIG.
Thereby, the supercharging efficiency of the engine 9 can be increased and the engine output can be improved.
Finally, exhaust gas discharged from an exhaust port (not shown) of the engine 9 is introduced into the turbocharger 13 through the connecting pipe 10i (exhaust manifold) and drives the turbine 13b. It is discharged outside the car through the main muffler.

<Capacitor operation>
The capacitor 2 is used as a component of a refrigeration circuit for air conditioning in a vehicle interior.
The vehicle interior air-conditioning refrigeration circuit is the same as a known one, and a detailed description of each component is omitted. However, a vapor compression refrigeration circuit in which an air-conditioning compressor, a condenser 2, an evaporator, and the like are connected in a ring shape It is.

As shown in FIG. 5, the flow medium (CO ₂ or HFC-134a or the like) around 60 ° C. flowing into the chamber R1 of the header tank 2a from the air conditioning compressor side via the input port of the input connector 2d is in the chamber R2. The vehicle running wind passing through the core portion 2c or the forced wind by the fan while flowing through the corresponding tubes 2h of the core portion 2c while turning the chamber R3 in this order (illustrated by broken arrows in FIG. The air flows into the chamber R4.

  Next, the flow medium in the chamber R4 flows into the receiver tank 2g and is gas-liquid separated by an internal structure (not shown), and then flows into the chamber R5.

  Next, the liquid distribution medium in the chamber R5 is heat-exchanged with the vehicle traveling wind passing through the core portion 2c or the forced air generated by the fan while flowing through the tubes 2h corresponding to the chambers R5 and R6 of the core portion 2c. As a result, it is supercooled to about 45 ° C. and flows into the chamber R6.

  Finally, the distribution medium in the chamber R6 is discharged from the output port of the output connector 2e to the evaporator side (not shown).

<About heat shield plate>
Here, in recent years, intake air has been on the trend of high pressure and high temperature for the purpose of coexistence of improvement of exhaust gas considering environment (decrease of unburned gas and harmful components in exhaust gas) and improvement of engine output. The target temperature of air is set to 180 ° C. to 200 ° C. (conventionally around 140 ° C., up to 42% increase).
As a result, in the case of the first embodiment, the hot air rising from the intercooler hits the core portion of the condenser when the vehicle is stopped or running at a low speed, etc., and there is a possibility that the cooling performance of the condenser, and thus the air conditioning performance of the passenger compartment will deteriorate. .

  On the other hand, in the first embodiment, as described above, the heat shield 5 is provided between the condenser 2 and the intercooler 3 so as to partition both of them, so that hot air rising from the intercooler 3 to the condenser 2 is generated. It is possible to prevent adverse effects by blocking, and to prevent the cooling performance of the capacitor 2.

  In addition, since the airflow flows backward through the through-passage 5d of the heat shield plate 5, the airflow can smoothly flow to the rear radiator 1 regardless of the thickness of the heat shield plate 5.

Further, since the rear end of the heat shield plate 5 is close to the core portion 1 c of the radiator 1, it is possible to prevent hot air from blowing back so as to go around the condenser 2 from the rear of the intercooler 3.
In the first embodiment, the air flow that has passed through the intercooler 3 flows into the engine room mainly from the flap 4e that is opened in the radiator core support 4. However, the present invention is not limited to this, and the fan openings 4c, You may lead to 4d.

<How to fix the heat shield>
In the first embodiment, since the heat shield 5 is made of resin and fitted and fixed to the locking pieces 4o and 4p of the radiator core support 4, the weight can be reduced and the mounting operation can be simplified.

  Further, since the position of the heat shield plate 5 in the front-rear direction can be adjusted, it is possible to easily cope with various thicknesses of the core portion 1c of the radiator 1.

  Furthermore, if the front end of the heat shield plate 5 is provided in close contact with a bumper armature or bumper fascia (not shown), it is possible to prevent hot air from the intercooler 3 from moving toward the condenser 2 even when the vehicle is stopped.

Next, the effect will be described.
As described above, in the invention of the first embodiment, in the vehicle heat exchanger including the intercooler 3 and the condenser 4 arranged in parallel with the air flow, between the adjacent intercooler 3 and the condenser 4. Since the heat shield plate 5 is provided, it is possible to prevent an adverse effect caused by the temperature difference between the adjacent intercooler 3 and the capacitor 4 and to prevent a decrease in cooling performance.

  In addition, since the intercooler 3 is used as the heat exchanger, it is possible to prevent a decrease in the cooling performance of the heat exchanger adjacent to the intercooler 3 that tends to have a high temperature among the heat exchangers.

  Further, the heat shield plate 5 has a hollow structure in which a plurality of column portions 5c connecting the two skin portions and upper and lower skin portions 5a and 5b and a plurality of through passages 5d penetrating in the front-rear direction are alternately arranged. Since it comprised, it is excellent in heat insulation performance, and can distribute | circulate air back smoothly through the through-passage 5d.

Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, 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, the number, direction, and type of heat exchangers arranged in parallel with the air flow can be set as appropriate. For example, a heat exchanger such as an oil cooler or a sub-radiator may be applied.
Moreover, the thickness of the heat shield 5 may be set large, or a plurality of sheets may be used in a stacked manner.
Furthermore, it is naturally conceivable to position the insertion margin of the heat shield 5 at a predetermined position by changing the shape of the locking pieces 4o, 4p.

  The detailed shape and fixing structure of the radiator core support and the heat exchanger described in the first embodiment can be set as appropriate.

It is a whole front view which shows the heat exchanger module by which the heat exchanger for vehicles of Example 1 was employ | adopted. FIG. 2 is a cross-sectional view (partially omitted) taken along line S2-S2 of FIG. 1 is a perspective view of a radiator according to Embodiment 1. FIG. 1 is a perspective view of a capacitor according to Example 1. FIG. 3 is a front view of the capacitor of Example 1. FIG. It is a perspective view of the intercooler of Example 1. FIG. It is a perspective view of the radiator core support of Example 1. FIG. It is a perspective view explaining the attachment state of the radiator core support and heat shield of Example 1. FIG. 2 is a perspective view of a heat shield plate of Example 1. FIG. FIG. 3 is an enlarged perspective view (partial cross-sectional view) of a part of the heat shield plate of Example 1. It is a figure explaining the engine cooling circuit and turbocharger gas circuit of Example 1. FIG.

Explanation of symbols

B1, B2, B3, B4 Bracket C1 Engine cooling circuit C2 Turbocharger gas circuit D1, D2 Divide plate M1, M2 Rubber mount R1, R2, R3, R4, R5, R6 Chamber 1 Radiator 1a Upstream tank 1b Downstream tank 1c Core portion 1d, 1e Tube plate 1f Input pipe 1g Output pipe 1h, 1i Fixing portion 1j Vehicle mounting pin 1k Locking bracket portion 1o Tube 1p Fin 1q, 1r Reinforce 2 Capacitor 2a, 2b Header tank 2c Core portion 2d Input connector 2e Output connector 2f Adapter section 2g Receiver tank 2h Tube 2i Fin 2j, 2k Reinforce 3 Intercooler 3a Upstream tank 3b Downstream tank 3c Core section 3d, 3e Tube plate 3f Input pipe 3g Output pipe 3 Vehicle mounting pin 3i Tube 3j Fin 4 Radiator core support 4a Shroud wall 4b Fan 4c, 4d Fan opening 4e Flap 4f Radiator insertion hole 4g Radiator fixing part 4h Intercooler insertion hole 4i Upper surface 4j Radiator fixing hole 4k Lower surface 4m Intercooler fixing hole 4n Side wall 4o, 4p Locking piece 5 Heat shield 5a, 5b Skin 5c Pillar 5d Through passage 9 Engine 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i, 10i, 10j Connection Tube 11 Thermostat
12 Pump 13 Turbocharger 13a Compressor 13b Turbine

Claims (3)

In a vehicle heat exchanger comprising a plurality of heat exchangers arranged in parallel to an air flow,
A heat exchanger for a vehicle, wherein a heat shield is provided between the adjacent heat exchangers. The vehicle heat exchanger according to claim 1, wherein
An automotive heat exchanger, wherein at least one of the plurality of heat exchangers is an intercooler. The vehicle heat exchanger according to claim 1 or 2,
The heat shield plate is configured by a hollow structure in which a plurality of pillars connecting the skin parts between the upper and lower skin parts and a plurality of through passages penetrating in the front-rear direction are alternately arranged. Vehicle heat exchanger.

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