JP2003314990A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device with a heat exchanger having improved cooling efficiency if not consistent in the quantity of cooling air. <P>SOLUTION: The cooling device M comprises: the heat exchanger 9 formed in a flat shape for cooling air with the passage of the cooling air w; an air distribution chamber provided on one side of the heat exchanger 9 extending to the longitudinal direction for distributing air flowing therein; an inlet duct 15 formed extending to the air distribution chamber; an air collecting chamber 11 provided on the other side opposite one side of the heat exchanger 9 extending to the longitudinal direction for collecting the cooled air, and an outlet duct 16 formed extending to the air collecting chamber 11. The heat exchanger 9 has a high efficiency core portion E1 having high cooling efficiency in a region near a flow path center line L1 of the inlet duct 15 and a low efficiency core portion E2 having low cooling efficiency in a region far from the flow path center line L1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for cooling the air flowing in an air circulation path and supplied to a heat source in a heat exchange section, and more particularly, the heat exchange section connects an air distribution chamber and an air collecting chamber. The present invention relates to a cooling device connected to an air circulation path through the cooling device.

[0002]

2. Description of the Related Art As the intake air supplied to a heat source such as an internal combustion engine has a higher output density as the intake air density increases, the intake air passing through an intercooler forming a heat exchange section can be cooled by running air. Has been done. Normally, it is necessary to deploy the intercooler in a place where it is easy to receive running wind, and a radiator grill etc. is deployed in the front part of the same position,
A radiator and an engine are installed behind it, and the traveling wind that reaches the intercooler is often subject to flow restrictions due to these opposing objects. Furthermore, the intercooler that forms the heat exchange portion easily overlaps with the arrangement position of the radiator.
It is arranged as shown in FIG.

Here, the intercooler 100, which is arranged in a tie-up state with the radiator 160, has an air distribution chamber 120 and an air collection chamber 130 at the left and right ends of a core 110 which is a heat exchange portion, and the air distribution chamber 120 and Each main wall member forming the air collecting chamber 130 has a distribution guide 170 and a collecting guide 180 that extend in the front-rear direction X that is orthogonal to the width direction Y of the core 110. Distributing guide 170 and gathering guide 1
Reference numeral 80 connects the inlet duct 140 and the outlet duct 150 to the respective connection ends, and is connected to the intake system of the engine body (not shown). Here, the distribution guide 170 is shown in FIG.
As shown in (b), the inflow end 170a has a cylindrical shape,
An extending portion e is gradually flattened and extended from the same portion, and a joint portion g at the tip thereof is formed into a flat vertical cylinder and integrally joined to the tank wall of the air distribution chamber 120. The assembly guide 180 is also formed symmetrically with the distribution guide 170.

[0004]

By the way, FIG.
The distribution guide 170 as shown in (b) causes the intake air to flow into the air distribution chamber 120 along the center line L0 of the intake cross section. Here, the flow velocity distribution in each cooling pipe provided in the core 110 facing the air distribution chamber 120 is shown in FIG.
This is indicated by the arrow in (c). Here, the distribution guide 1
The intake velocity in the cooling pipe in the region close to the flow passage center line L0 of 70 increases, and the intake velocity in the cooling pipe in the region far from the flow passage center line L0 decreases, resulting in uneven flow velocity inside the core. Occurs, reducing the cooling efficiency of the heat exchange section as a whole.

Further, the traveling wind reaching the intercooler is subject to flow regulation by a radiator grill etc., so that a large amount of traveling wind hits a part of the intercooler and only a small amount of traveling wind hits other regions. The cooling efficiency of the heat exchange section as a whole is reduced even when there is a large distribution of traveling air, and improvement is desired. An object of the present invention is to provide a cooling device which can improve the cooling efficiency of the heat exchanger even if there is a variation in the air volume on the cooling air contact surface of the heat exchanger, based on the above problems.

[0006]

According to a first aspect of the present invention, there is provided a heat exchanging portion, which is formed in a flat shape that cools air by passing cooling air and is orthogonal to a passing direction of the cooling air, and the heat exchanging portion. On one side of the heat exchanging portion, the air distribution chamber extending in the longitudinal direction to distribute the inflowing air, the inlet duct extending from the air distribution chamber, and the other side facing the one side of the heat exchanging portion. An air collecting chamber that is provided to extend to collect the cooled air and an outlet duct that is formed to extend to the air collecting chamber, and the air that has flowed in from the inlet duct from the air distribution chamber to the heat exchange section. In the cooling device that reaches the air-air collecting chamber via the exhaust duct,
The heat exchange portion is formed as a high-efficiency core portion having high cooling efficiency in a region close to the flow path center line of the inlet / outlet duct, and as a low efficiency core portion having low cooling efficiency in a region far from the flow path center line. Is characterized by. Thus, in the heat exchange part, a region near the flow path center line of the inlet / outlet duct is a high efficiency core part having high cooling efficiency, and a region far from the flow path center line is a low efficiency core part having low cooling efficiency. Therefore, since a relatively large amount of air tends to flow into each cooling pipe in the region near the flow path center line of the inlet / outlet duct, it is possible to cool the air reaching a relatively large amount to the same portion with high efficiency, The cooling efficiency of the entire heat exchange section can be improved. For example, when the cooling device is used in the intake system of an engine, pumping loss can be reduced and the amount of air can be increased to improve the output.

[0007] Preferably, the high-efficiency core portion may be provided with high-efficiency-oriented fins for enhancing cooling efficiency in each cooling pipe. In this case, the air flowing through each cooling pipe of the high-efficiency core can be cooled with high efficiency, improving the cooling efficiency of the heat exchange unit as a whole and further increasing the flow resistance. By cooling air by diverting a relatively large amount of air to the low-efficiency core side with fins installed, the cooling efficiency can be increased and the flow velocity of the entire heat exchange section can be made uniform.
The cooling efficiency of the heat exchange section as a whole can be improved.

Preferably, the inlet duct is connected to the central portion of the air distribution chamber in the longitudinal direction, and the heat exchange portion arranges the high-efficiency core portion in the central portion of the longitudinal direction and at the same time in the longitudinal direction. You may arrange | position the said low efficiency core part at both ends, respectively. In this case, the cooling air can flow around the low-efficiency core portion above and below the high-efficiency core portion in the center, a relatively large amount of cooling air can flow into the low-efficiency core portion, and the overall flow velocity can be made uniform. As a result, the cooling efficiency can be improved.

According to the second aspect of the present invention, the air is cooled by the passage of the cooling air, and the heat exchanging portion is formed in a flat shape orthogonal to the passage direction of the cooling air. An air distribution chamber that is extended and distributes the inflowing air, an inlet duct that is formed to extend in the air distribution chamber, and a longitudinal direction is provided on the other side of the heat exchange unit that faces the one side. An air collecting chamber that collects cooled air and an outlet duct that is formed to extend in the air collecting chamber are provided, and the air that flows in from the inlet duct is the air air from the air distribution chamber through the heat exchange unit. In the cooling device that reaches the collecting chamber and is discharged from the outlet duct, the cooling device includes a structure that is provided so as to face the heat exchanging portion and restricts the flow of cooling air passing through the heat exchanging portion. Of the cooling air flowing into the heat exchange section A region having a high speed is formed as a high efficiency core part having a high cooling efficiency, and a region having a low flow velocity of cooling air flowing into the heat exchange part is formed as a low efficiency core part having a low cooling efficiency. . In this way, even if the cooling air flowing into the heat exchanging portion is flow-regulated by the structure or the like arranged opposite to the heat exchanging portion, the region where the flow velocity of the cooling air flowing into the heat exchanging portion is high has high cooling efficiency. Since it is formed as a high-efficiency core part, it is possible to highly efficiently cool the air that reaches a relatively large amount to the same part, and it is possible to enhance the cooling efficiency of the entire heat exchange part. For example, when the cooling device is used in an intake system of an engine, pumping loss can be reduced and the amount of air can be increased to improve output.

Preferably, the high-efficiency core portion may be provided with high-efficiency type fins for enhancing cooling efficiency in each cooling pipe. In this case, the air flowing through each cooling pipe of the high-efficiency core can be cooled with high efficiency, improving the cooling efficiency of the heat exchange unit as a whole and further increasing the flow resistance. By cooling air by diverting a relatively large amount of air to the low-efficiency core side with fins installed, the cooling efficiency can be increased and the flow velocity of the entire heat exchange section can be made uniform.
The cooling efficiency of the heat exchange section as a whole can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an engine 1 equipped with an intake air cooling device M as an embodiment of the present invention. The engine 1 is installed in an engine room 2 of a vehicle (not shown),
The engine body 101 is water-cooled using the water cooling device C. The engine 1 includes an intake passage I that guides intake air to a plurality of cylinders (not shown), and an intake air cooling device M in the middle thereof. Here, the water cooling device C guides high-temperature cooling water of a water jacket (not shown) in the engine body 101 to the radiator 3, receives traveling wind w from the front part (left side in FIG. 1) during traveling, or a cooling fan (not shown). The cooling water is cooled by the radiator 3 that receives the cooling air of (3) to prevent excessive temperature rise of the engine.

The intake air cooling device M is arranged in the intake passage I of the engine 1. In the intake passage I, the intake air filtered by an air cleaner (not shown) is pressurized by the supercharger 4 and guided to the intercooler 6 through the inflow duct 5, and the intake air cooled by the intercooler 6 that receives the traveling wind w or the cooling air flows out. It is supplied to the combustion chamber (not shown) via the duct 7 and the intake manifold 8 on the engine body 101 side. The intake air cooling device M of the engine is the same as the intercooler 6 and the supercharger 4
Inflow duct 5 that guides intake air from the side, and intercooler 6
And an outflow duct 7 for outflowing intake air from.

The intercooler 6 is arranged in a front portion (left side in FIG. 1) in the front-rear direction X in the engine room 2.
As shown in FIG. 1, FIG. 2A, and FIG. 2B, the intercooler 6 and the heat exchanger 9 as a heat exchanging portion are arranged in a front portion of the radiator 3 so as to be overlapped with each other at a predetermined interval. Each of the tank wall portions 1 of the air distribution chamber 11 and the air collecting chamber 12 which are continuously provided in the vertical direction on both sides in the vehicle width direction Y of the container 9.
3, 14 and the inlet duct 1 connected to the air distribution chamber 11
5 and an outlet duct 16 connected to the air collecting chamber 12. The intercooler 6 is arranged in a state in which an inlet duct 15 and an outlet duct 16 embrace the radiator 3 located on the side of the passage area of the traveling wind w or the cooling wind.

The heat exchanger 9 of the intercooler 6 is shown in FIG.
As shown in (a) and (b), it has a plurality of cooling pipes 19 extending in the vehicle width direction Y and arranged vertically, and a base frame 18 supporting them. Here, the left and right opening ends 191 of the respective cooling pipes 19 are provided on the left and right pipe support plates 1 on the base frame 18 side.
The pipe support plates 1 on the left and right are integrally connected to the pipe 81 in a penetrating state.
Reference numeral 81 is integrally connected to the upper and lower frame portions 182, so that the heat exchanger 9 including a plurality of cooling pipes 19 arranged vertically
The shape retention of is secured. As shown in FIG. 2 (a), two long plate pieces 20 are attached to the center of the heat exchanger 9 with a predetermined gap therebetween, and each long plate piece 20 penetrates each cooling pipe 19. , And functions to suppress the vibration between the vertically adjacent cooling pipes 19.

As shown in FIGS. 1, 2A and 3A, the air distribution chamber 11 is covered with a pipe support plate 181 and a tank wall portion 13. An inlet duct 15 is integrally connected to an outer end portion of the tank wall portion 13 in the vehicle width direction Y.

The inlet duct 15 is connected to the air distribution chamber 11 by bending a substantially fan-shaped main portion 151 facing the radiator 3 located on the side of the passage of the traveling wind w, which is the cooling wind, from the main portion 151 at a substantially right angle. The connecting portion 152 to be formed is integrally formed. The main portion 151 has a tubular portion 151a fitted to the inflow duct 5, and a flat portion 151b that extends flatly from the tubular portion 151a toward the center of the air distribution chamber 11 so as to be connected obliquely from above. Bent portion 151 reaching from flat portion 151b to connection portion 152 connected to air distribution chamber 11
and c. A passage cross section a1 of the main portion 151 has a vertically long rectangular shape, and the rectangular cross section is flattened vertically as it goes to the bent portion 151c, and reaches a connecting portion 152 in the longitudinal direction of the air distribution chamber 11 (vertical direction). ) Is formed as a flat shape.

The outlet duct 16 arranged on the side opposite to the inlet duct 15 of the heat exchanger 9 is a virtual center plane that divides the heat exchanger 9 into right and left (a plane indicated by a symbol f perpendicular to the plane of FIG. 2A). ), It is formed symmetrically with the shape of the inlet duct 15. In this way, the outlet duct 16 is formed in the intercooler 6 as well as the inlet duct 15, so that the air flowing from the inlet duct 15 reaches the air-air collecting chamber 12 from the air distribution chamber 11 via the heat exchanger 9. , Outlet duct 1
It is possible to flow out from 6 to the outflow duct 7 side.

By the way, as shown in FIG. 3 (a), the inlet duct 15 is provided with a vertically elongated rectangular passage cross section a1.
The flow path center line L1 is directed toward the center of the air distribution chamber 11 and is connected obliquely from above. Therefore, the inlet duct 15 compares the intake air flowing into the tubular portion 151a with the inlet region E1 near the flow path center line L1 in the longitudinal direction (vertical direction) of the air distribution chamber 11 as shown in FIG. 9C. A very large amount is made to flow in, and a relatively small amount is made to flow into the side end region E2 far from the flow path center line L1.

Here, the heat exchanger 9 is, as shown in FIG.
The high-efficiency-oriented fins f1 for increasing the cooling efficiency are mounted in the respective cooling pipes 19 which are located in the inlet region E1 and have a cross-sectional width B. As shown in FIG. 6A, in the high-efficiency-oriented fin f1, the belt-shaped metal plate itself having a width B1 close to the width B of the cross-section is formed in advance to have unevenness, and then repeatedly bent and deformed. It is molded and has a larger heat radiation area. By mounting this in the cooling pipe 19, the heat radiation area can be sufficiently increased and the cooling efficiency of the cooling pipe 19 can be improved.

A low pressure loss-oriented fin f2 is mounted in each cooling pipe 19 located in the side end region E2 of the heat exchanger 9.
As shown in FIG. 6B, the low-pressure loss-oriented fin f2 is formed by repeatedly bending and deforming a belt-shaped metal plate having a width B1 that is close to the cross-sectional width B of the cooling pipe 19, and thus the high efficiency-oriented fin f2 is formed. Compared to the fin f1, the heat radiation area is small, the pressure loss of the intake air passing through the cooling pipe is small, and the cooling efficiency is low. As described above, the heat exchanger 9 has the structure shown in FIG.
As shown in (1), the inlet region E1 is formed as a high-efficiency core part having high cooling efficiency, and the side end region E2 is formed as a low-efficiency core part having low cooling efficiency in which the low-pressure-loss-oriented fins f2 are incorporated.

Thus, the heat exchanger 9 of the intercooler 6
As shown in FIG. 10 (c), the inlet region E1 where the intake flow velocity is the highest even if there is variation in the intake flow velocity reaching the inside of the cooling pipe 19 has high cooling efficiency. By forming the portion, the cooling function of the intake air can be effectively operated, and the cooling efficiency of the heat exchanger 9 as a whole can be improved as shown in FIG. 3B.

Further, in this case, since the flow efficiency of the cooling pipe 19 is increased by the high-efficiency type fin f1 in the cooling pipe 19 in the inlet region E1, the intake flow ratio is reduced to the side end region E2 side where the flow resistance is low. The cooling efficiency of the entire heat exchanger 9 can be increased. In this case, in particular, the intake air can be separated into the upper and lower sides of the inlet region E1 that is the high-efficiency core portion at the center in the up-down direction and can flow around to the side end region E2 side that is the low-efficiency core portion. Since a relatively large amount of intake air flows into the side, the overall flow rate can be made uniform (see FIG. 3B), and the overall cooling efficiency can be improved. A modified example of the intercooler shown in FIGS. 1 and 2 will be described with reference to FIGS.

In the above-mentioned intercooler 6, as shown in FIG. 4, the heat exchanger 9 has an inlet region E1 as a high-efficiency core portion having a high cooling efficiency, and the inlet region E1 has upper and lower side ends having a low cooling efficiency. Although it was configured to be sandwiched in the region E2, instead of this, in consideration of the traveling wind subjected to flow regulation by the vehicle structure disposed opposite to the intercooler 6, FIG. 7A and FIG. It may be configured as shown in. Here, the intercooler 6b is different from the intercooler 6 shown in FIGS. 1 and 2 only in the configuration of the heat exchanger 9b, and thus the duplicate description will be omitted.

The traveling wind w reaching the heat exchanger 9b is strongly regulated by a radiator grill (not shown) of the vehicle, and a relatively large amount of traveling wind is applied to the lower half side of the heat exchanger 9b compared to the upper half side. w flows in. Therefore, the heat exchanger 9b
Is a high-efficiency wind area E that is a high-efficiency core that enhances cooling efficiency
3 is formed on the lower half side, and the low traveling wind region E4, which is a low-efficiency core portion having low cooling efficiency, is formed on the upper half side. As shown in FIG. 8, each cooling pipe 19b located in the high traveling wind area E3 has a height that can secure an intake passage inside the cooling pipe 19b with the same cross section (bending cross section) in the pipe longitudinal direction. An efficiency-oriented fin f1 (see FIG. 6A) is fitted and inserted. This high-efficiency type fin f1 repeatedly bends and deforms a metal plate having substantially the same length as the cooling pipe 19a to form a bent metal plate having the same cross section, and the cooling pipe 19b.
It is press-fitted inside.

The high-efficiency-oriented fin f1 is formed by forming the unevenness of the metal plate itself in advance, and then repeatedly bending and deforming the metal plate so that the heat radiation area is sufficiently increased. The contact area with the intake air that has flowed into the cooling pipe 19b is increased, and heat on the intake side can be sufficiently transferred to the surface of the cooling pipe 19b, whereby the intake air can be efficiently cooled by the traveling wind w. Further, a low pressure loss-oriented fin f2 (see FIG. 6B) is fitted into each cooling pipe 19 located in the low traveling wind area E4.

As shown in FIGS. 7A and 8, the heat exchanger 9b of the intercooler 6b is formed in the high traveling air region E3 as a highly efficient core portion having high cooling efficiency. Moreover, as shown by the solid line in FIG. 7 (b), a relatively large amount of running wind w flows into the lower half side of the heat exchanger 9b here compared to the upper half side, and the heat exchanger 9b Even if there is variation in the air volume on the cooling air contact surface of
The cooling efficiency of the intake air in the high traveling wind area E3 becomes extremely high, and the cooling efficiency of the heat exchanger 9 as a whole can be improved.

In the above description, the intake air cooling device M has been described for a vehicle. However, a stationary engine cooling device,
Alternatively, it can be similarly applied to a cooling device for an electric motor. In these cases, the cooling air becomes an air flow generated by a fan instead of the running air, and in these cases, the same action and effect as the intake air cooling device of FIG. 1 can be obtained. .

[0028]

As described above, according to the invention of claim 1, in the heat exchange portion, a region close to the flow path center line of the inlet / outlet duct is a high efficiency core portion having high cooling efficiency, and the flow path center line is Since the low efficiency core part where the cooling efficiency is low is located in the area farther than, there is a tendency for a relatively large amount of air to flow into each cooling pipe in the area near the flow path center line of the inlet / outlet duct. Air reaching a relatively large amount can be cooled with high efficiency, and the cooling efficiency of the entire heat exchange section can be improved. For example, when the cooling device is used in the intake system of an engine, pumping loss is reduced,
The amount of air increases and the output can be improved.

According to the second aspect of the present invention, even if the flow of the cooling air flowing into the heat exchanging portion is regulated by an opposed object or the like, the region where the flow velocity of the cooling air flowing into the heat exchanging portion is high has a high cooling efficiency. Since it is formed as the core portion, it is possible to highly efficiently cool the air that reaches a relatively large amount in the same portion, and it is possible to enhance the cooling efficiency of the entire heat exchange portion. For example, when the cooling device is used in an intake system of an engine, pumping loss can be reduced and the amount of air can be increased to improve output.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an engine equipped with an intake air cooling device as an embodiment of the present invention.

FIG. 2 is an intercooler in FIG. 1, where (a) is a front view and (b) is an enlarged cutaway sectional view of essential parts.

FIG. 3 is an intercooler in FIG. 1, where (a) is a side view and (b) is an explanatory view of intake air flow velocity distribution in a cooling pipe in a heat exchanger.

FIG. 4 is a functional region distribution explanatory diagram in the heat exchanger of the intercooler in FIG. 1.

5 is a partial cross-sectional view of a plurality of cooling pipes in the heat exchanger of the intercooler in FIG.

FIG. 6 is a perspective view of fins used in the heat exchanger of the intercooler in FIG. 1, where (a) is a high efficiency type fin,
(B) shows a low pressure loss-oriented fin.

FIG. 7 is a modified example of the intercooler in FIG.
(A) is a schematic side view, (b) is a distribution explanatory view of the traveling wind flow velocity between each cooling pipe in a heat exchanger.

8 is a partial cross-sectional view of a plurality of cooling pipes in the heat exchanger of the intercooler of FIG.

9 is a functional region distribution explanatory diagram in the heat exchanger of the intercooler of FIG. 7. FIG.

10A and 10B show a conventional intercooler, in which FIG. 10A is a plan view, FIG. 10B is a side view, and FIG. 10C is a distribution of intake air velocity in a cooling pipe of the intercooler.

[Explanation of symbols]

9 heat exchanger 11 air distribution chamber 15 entrance duct 12 air meeting room 16 Exit duct L1 flow path center line E1 entrance area E2 side edge area E3 High wind area E4 Low driving wind area a1 passage cross section w Cooling wind M intake cooling system

Claims (2)

[Claims] 1. A heat exchanging portion formed in a flat shape that cools air by passage of cooling air and is orthogonal to the passage direction of cooling air, and is provided on one side of the heat exchanging portion so as to extend in the longitudinal direction and flow in. An air distribution chamber that distributes air, an inlet duct that is formed to extend in the air distribution chamber, and a cooling air that is provided in a longitudinal direction on the other side of the heat exchange section that faces the one side and collects the cooled air. An air collecting chamber and an outlet duct that is formed to extend in the air collecting chamber are provided, and the air that has flowed in from the inlet duct reaches the air-air collecting chamber from the air distribution chamber via the heat exchange section, In the cooling device discharged from the outlet duct, the heat exchange section has a high-efficiency core portion having a high cooling efficiency in a region close to the flow path center line of the input / output duct, and has a low cooling efficiency in a region far from the flow path center line. Shaped as low efficiency core A cooling device characterized by being formed. 2. A heat exchange part formed in a flat shape perpendicular to the passage direction of the cooling air, the air being cooled by the passage of the cooling air, and an inflow provided on one side of the heat exchange part so as to extend in the longitudinal direction. An air distribution chamber for distributing the air, an inlet duct formed to extend in the air distribution chamber, and a cooled air provided in the other side of the heat exchanging portion opposite to the one side in the longitudinal direction. An air collecting chamber and an outlet duct formed to extend in the air collecting chamber are provided, and the air flowing from the inlet duct reaches the air-air collecting chamber from the air distribution chamber via the heat exchange unit. In the cooling device discharged from the outlet duct, a structure is provided opposite to the heat exchange section, and a structure for restricting flow of cooling air passing through the heat exchange section is provided, and the heat exchange section flows into the heat exchange section. The area where the flow velocity of the cooling air A cooling device, which is formed as a high-efficiency core portion having a high cooling efficiency, and regions in which the flow velocity of the cooling air flowing into the heat exchange portion is slow are formed as low-efficiency core portions having a low cooling efficiency.