JP2020016208A - Heat transfer device for vehicle - Google Patents

Abstract

To provide a heat transfer device for a vehicle capable of being miniaturized.SOLUTION: A heat transfer device for a vehicle as a cooling system for the vehicle includes a high-temperature radiator 2 radiating heat from a high-temperature heat medium, a low-temperature radiator 3 disposed at a windward side of the high-temperature radiator 2 to radiate heat from a low-temperature heat medium, an engine as a first cooled apparatus cooled by the heat medium of which the heat is radiated by the high-temperature radiator 2, a second cooled apparatus cooled by the heat medium of which heat is radiated by the low-temperature radiator 3, high temperature-side piping 6 for circulating the heat medium between the high-temperature radiator 2 and the first cooled apparatus, and low temperature-side piping 7 for circulating the heat medium between the low-temperature radiator 3 and the second cooled apparatus. Header tanks 12, 13 of the low-temperature radiator 3 are positioned at a windward side of header tanks 8, 9 of the high-temperature radiator 2. The low temperature-side piping 7 is penetrated through the header tanks 8, 9 of the high-temperature radiator 2 and connected to the header tanks 12, 13 of the low-temperature radiator 3.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle heat transfer device.

  For example, in a vehicle using an engine as a prime mover, in addition to the engine, a liquid-cooled charge air cooler (intercooler) that lowers the intake air temperature compressed by a turbocharger is mounted as a device to be cooled, In a hybrid vehicle using an engine and a motor as a prime mover, a power device used for a power converter is mounted as a device to be cooled in addition to the engine.

  These devices to be cooled are cooled using a liquid heat medium such as a coolant, but the temperature of the engine during running of the vehicle is higher than that of other devices to be cooled. To be cooled. Then, the heat of the first coolant that has cooled the engine is dissipated by the high-temperature radiator, and the second coolant that is lower in temperature than the first coolant after cooling other cooled equipment and cooling the engine. A cooling system for a vehicle that radiates the heat of the vehicle at a low-temperature radiator has been considered.

  As one example of this type of vehicle cooling system, the one described in Patent Document 1 is known. The vehicle cooling system described in Patent Literature 1 includes a high-temperature radiator that radiates heat from an engine coolant, and an intake air that is arranged along the windward side of the high-temperature radiator and used to cool the intake air with a charge air cooler. A low-temperature radiator that radiates heat from the coolant, a high-temperature side pipe that circulates engine coolant between the engine and the high-temperature radiator, and a low-temperature side that circulates intake coolant between the charge air cooler and the low-temperature radiator A low-temperature side pipe is provided so as to avoid the engine, the high-temperature radiator and the high-temperature side pipe.

  However, in the vehicle cooling system described in Patent Document 1, the low-temperature side pipe is provided so as to avoid the engine, the high-temperature radiator, and the high-temperature side pipe. There is a problem that the installation work of the is troublesome.

JP-A-2017-19006

  An object of the present invention is to provide a heat transfer device for a vehicle that solves the above-mentioned problem and can be downsized.

  The present invention has the following aspects to achieve the above object.

1) A plurality of heat exchangers that are arranged side by side in the ventilation direction and through which different heat media flow, heat transfer devices that exchange heat with the heat medium flowing through each heat exchanger, each heat exchanger and each heat A heat transfer device for a vehicle, comprising: a pipe for circulating a heat medium between the transfer device and the transfer device.
Each of the heat exchangers has two header tanks whose longitudinal directions are directed in the same direction and are spaced apart from each other, and a heat exchange core portion provided between the header tanks, and each pipe has a heat exchanger. A pipe connected to at least one of the header tanks of the heat exchanger and connected to the header tank of one of the two adjacent heat exchangers is a header of the other heat exchanger. Heat transfer device for vehicles that penetrates the tank.

  2) The heat exchanger is a radiator that radiates heat from the heat medium by exchanging heat between the air and the heat medium introduced from the opening of the vehicle, and a device to be cooled in which the heat transfer device is cooled by the heat medium. The heat transfer device for a vehicle according to 1) above, wherein

  3) Cooled by a high-temperature radiator that radiates heat from a high-temperature heat medium, a low-temperature radiator that is arranged on the windward side of the high-temperature radiator and radiates heat from a low-temperature heat medium, and a heat medium that radiates heat from the high-temperature radiator. An engine as a first device to be cooled, a second device to be cooled cooled by a heat medium radiating heat from a low-temperature radiator, and a heat medium circulating between the high-temperature radiator and the first device to be cooled. A high-temperature side pipe, and a low-temperature side pipe that circulates a heat medium between the low-temperature radiator and the second apparatus to be cooled; a header tank of the low-temperature radiator is located on the windward side of the header tank of the high-temperature radiator; (2) The heat transfer device according to the above (2), wherein the low-temperature side pipe passes through the header tank of the high-temperature radiator and is connected to the header tank of the low-temperature radiator.

  According to the heat transfer apparatus for vehicles of the above 1) to 3), each heat exchanger is provided between the two header tanks and the two header tanks that are arranged at an interval with the longitudinal direction directed in the same direction. A heat exchange core portion, each pipe is connected to at least one of the header tanks of each heat exchanger, and the header of one of the two adjacent heat exchangers Since the pipe connected to the tank penetrates the header tank of the other heat exchanger, the size can be reduced as compared with the vehicle cooling system described in Patent Document 1, and there is only a limited space. Installation work on the vehicle is relatively simple. In addition, the pipe is usually configured by connecting a plurality of pipes using a pipe joint. However, the pipe connected to the header tank of one of the two adjacent heat exchangers is used. When penetrating the header tank of the other heat exchanger, it is connected to two adjacent heat exchangers and the header tank of the one heat exchanger and penetrates the header tank of the other heat exchanger. It is possible to collectively braze the pipes forming the pipes and the pipes forming the pipes connected to the header tank of the other heat exchanger, thereby improving the productivity.

It is a figure showing roughly the whole composition of the cooling system for vehicles which applied the heat transfer device for vehicles of this invention. FIG. 2 is a perspective view illustrating two radiators of the vehicle cooling system of FIG. 1. FIG. 3 is an enlarged horizontal sectional view showing a part of an upper header tank of the two radiators shown in FIG. 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, a vehicle heat transfer device according to the present invention is applied to a vehicle cooling system that cools an engine and other equipment to be cooled.

  In the following description, the term “aluminum” includes an aluminum alloy in addition to pure aluminum.

  In the following description, the lower side of FIG. 1 (the front of the vehicle equipped with the vehicle heat transfer device) is referred to as the front, and the opposite side is referred to as the rear. In addition, the up and down (up and down in FIG. 2) as viewed from the back to the front is referred to as up and down.

  FIG. 1 shows the overall configuration of a vehicle cooling system to which the vehicle heat transfer device according to the present invention is applied, and FIGS. 2 and 3 show the configuration of main parts thereof.

  In FIG. 1, a vehicle cooling system (1) is arranged at a distance from an aluminum high-temperature radiator (2) that radiates heat from a high-temperature heat medium, to a windward side (front side) of the high-temperature radiator (2), and A low-temperature radiator made of aluminum that radiates heat from a low-temperature heat medium, a first cooled device that is cooled by a heat medium that radiates heat with the high-temperature radiator, and a low-temperature radiator A high-temperature side pipe made of aluminum for circulating the heat medium between the second device to be cooled (5) cooled by the heat medium that has radiated the heat at the high temperature radiator (2) and the first device to be cooled (4) (6) and an aluminum low-temperature side pipe (7) for circulating a heat medium between the low-temperature radiator (3) and the second apparatus to be cooled (5).

  As shown in FIGS. 2 and 3, the high-temperature radiator (2) is composed of two header tanks (8) and (9) having their longitudinal directions oriented in the same direction and arranged at intervals in the vertical direction. (8) A heat exchange core (11) provided between (9). A supply part for flowing a heat medium from the first cooled device (4) in the high-temperature side pipe (6) to the high-temperature radiator (2) side in one header tank of the high-temperature radiator (2), here the upper header tank (8). The end of (6A) is connected to the other header tank, here the lower header tank (9), from the high-temperature radiator (2) in the high-temperature pipe (6) to the first cooled equipment (4) side. The end of the discharge portion (6B) through which the heat medium flows is connected.

  The low-temperature radiator (3) is provided between the two header tanks (12) and (13), with the longitudinal direction facing in the same direction and spaced apart in the vertical direction, and between the two header tanks (12) and (13). And a heat exchange core section (14), and both header tanks (12) and (13) are located on the windward side of both header tanks (8) and (9) of the high-temperature radiator (2). A supply part for flowing a heat medium from the second cooled equipment (5) in the low-temperature side pipe (7) to the low-temperature radiator (3) in one header tank of the low-temperature radiator (3), here, the upper header tank (12). 7A) is connected to the other header tank, here the lower header tank (13), from the low-temperature radiator (3) in the low-temperature pipe (7) to the second cooled equipment (5) side. The end of the discharge portion (7B) through which the medium flows is connected. The supply part (7A) of the low-temperature side pipe (7) passes through the upper header tank (8) of the high-temperature radiator (2) and is connected to the upper header tank (12) of the low-temperature radiator (3). The portion (7B) passes through the lower header tank (9) of the high-temperature radiator (2) and is connected to the lower header tank (13) of the low-temperature radiator (3).

  Although not shown, the heat exchange core portions (11) and (14) of the high-temperature radiator (2) and the low-temperature radiator (3) are spaced from each other in the longitudinal direction of both header tanks with their longitudinal directions directed vertically. A plurality of aluminum heat exchange tubes connected to the upper and lower header tanks (8) (9) (12) (13) at both upper and lower ends and adjacent heat exchange tubes And a plurality of aluminum fins brazed to the heat exchange tube.

  The first device to be cooled (4) is an engine having a turbocharger, and the heat medium from which heat is radiated by the high-temperature radiator (2) is an engine coolant. In the present embodiment, the second device to be cooled (5) is a charge air cooler such as an intercooler that cools high-temperature intake air compressed by a turbocharger, and heat that is radiated from the low-temperature radiator (3). The medium is an intake cooling liquid.

  An annular bead (15) is integrally provided at a portion of the supply portion (6A) of the high-temperature side pipe (6) near the connection end to the high-temperature radiator (2), and a portion closer to the tip side than the annular bead (15). Are brazed to the rear wall (8a) of the upper header tank (8) while being inserted into through holes (16) formed in the rear wall (8a) of the upper header tank (8). In addition, an annular bead (17) is integrally provided at a portion of the discharge portion (6B) of the high-temperature side pipe (6) near the connection end to the high-temperature radiator (2), and is closer to the distal end than the annular bead (17). Part is inserted into a through hole (not shown) formed in the rear wall (9a) of the lower header tank (9) and brazed to the rear wall (9a) of the lower header tank (9). I have.

  The supply part (7A) of the low-temperature side pipe (7) includes through holes (18) (19) formed in the rear wall (8a) and the front wall (8b) of the upper header tank (8) of the high-temperature radiator (2). , And the rear wall (8a) of the upper header tank (8) in a state of being passed through a cylindrical flange portion (21) provided in a rearwardly protruding shape around the through hole (18) on the outer surface of the rear wall (8a). , And are brazed to the cylindrical flange portion (21) and the front wall (8b). In addition, an annular bead (22) is integrally provided at a portion of the supply part (7A) of the low-temperature side pipe (7) that protrudes forward from the upper header tank (8), and is provided at the tip of the annular bead (22). The lower part is inserted into the through hole (23) formed in the rear wall (12a) of the upper header tank (12) of the low-temperature radiator (3), and is inserted into the rear wall (12a) of the upper header tank (12). Brazed. The discharge part (7B) of the low temperature side pipe (7) is a through hole (not shown) formed in the rear wall (9a) and the front wall (not shown) of the lower header tank (9) of the high temperature radiator (2). And the rear wall (9a) of the lower header tank (9) in a state where the rear wall (9a) is passed through a cylindrical flange portion (24) protruding rearward around the through hole on the outer surface of the rear wall (9a). It is brazed to the flanged flange (24) and the front wall. In addition, an annular bead (25) is integrally provided at a part of the discharge part (7B) of the low-temperature side pipe (7) that protrudes forward from the lower header tank (9), and is formed integrally with the annular bead (25). The rear wall of the lower header tank (13) is inserted in a state where the front end portion is inserted into a through hole (not shown) formed in the rear wall (13a) of the lower header tank (13) of the low-temperature radiator (3). (13a) brazed.

  When the vehicle equipped with the vehicle cooling system (1) having the above-described configuration starts running, the engine coolant that has cooled the engine (4) and has become hot is supplied to the high-temperature side pipe (6). (6A), is fed into the upper header tank (8) of the high-temperature radiator (2), and flows into the lower header tank (9) through the heat exchange pipe of the heat exchange core (11). The heat of the high-temperature engine coolant is introduced into the engine room through the running air inlet and is radiated to the air passing through the gap between adjacent heat exchange tubes of the heat exchange core (11). The engine coolant cooled by radiating the heat is sent to the engine (4) through the discharge portion (6B) of the high-temperature side pipe (6), and is used for cooling the engine.

  On the other hand, the intake air coolant, which has cooled the intake air in the charge air cooler and has become hot, is sent into the upper header tank (12) of the low-temperature radiator (3) through the supply part (7A) of the low-temperature side pipe (7). While flowing through the heat exchange pipe of the heat exchange core part (14) and into the lower header tank (13), the heat of the high-temperature intake coolant is introduced into the engine room through the traveling wind inlet. Then, the heat is radiated to the air passing through the gap between the adjacent heat exchange tubes of the heat exchange core portion (14). The intake coolant cooled by radiating heat is sent to the charge air cooler (5) through the discharge portion (7B) of the low-temperature side pipe (7), and is used for cooling the intake.

  In the above embodiment, the first device to be cooled is an engine having a turbocharger, and the second device to be cooled is a charge air cooler such as an intercooler for cooling high-temperature intake air compressed in the turbocharger. However, the application of the device to be cooled may be other. For example, the first device to be cooled may be an engine in a hybrid vehicle using an engine and a motor as a prime mover, and the second device to be cooled may be a power device used for a power converter of a motor.

  In the above embodiment, the low-temperature radiator (3) is arranged on the windward side of the high-temperature radiator (2), and the low-temperature side pipe (7) penetrates the header tank (8) of the high-temperature radiator (2). Conversely, the high temperature radiator (2) may be arranged on the windward side of the low temperature radiator (3), and the high temperature side pipe (6) may pass through the header tank (12) of the low temperature radiator (3).

  The heat transfer device for a vehicle according to the present invention is suitably used as a cooling system for cooling a plurality of devices to be cooled mounted on a vehicle.

(1): Vehicle cooling system (vehicle heat transfer device)
(2): High-temperature radiator (heat exchanger)
(3): Low temperature radiator (heat exchanger)
(4): Engine (heat exchanger, first cooled equipment)
(5): Charge air cooler (heat exchanger, second cooled equipment)
(6): High temperature side piping
(7): Low temperature side piping
(8) (9) (12) (13): Header tank
(11) (14): Heat exchange core

Claims (3)

A plurality of heat exchangers that are arranged side by side in the ventilation direction and through which different heat mediums flow, heat transfer devices that exchange heat with the heat medium flowing through each heat exchanger, each heat exchanger and each heat transfer device And a pipe for circulating a heat medium between the heat transfer device and the vehicle.
Each of the heat exchangers has two header tanks whose longitudinal directions are directed in the same direction and are spaced apart from each other, and a heat exchange core portion provided between the header tanks, and each pipe has a heat exchanger. A pipe connected to at least one of the header tanks of the heat exchanger and connected to the header tank of one of the two adjacent heat exchangers is a header of the other heat exchanger. Heat transfer device for vehicles that penetrates the tank. The heat exchanger is a radiator that radiates heat from the heat medium by exchanging heat between the air and the heat medium introduced from the opening of the vehicle, and a heat exchange device that is a cooled device that is cooled by the heat medium. The vehicle heat transfer device according to claim 1. A high-temperature radiator that radiates heat from a high-temperature heat medium, a low-temperature radiator that is arranged on the windward side of the high-temperature radiator and radiates heat from a low-temperature heat medium, and a first medium that is cooled by a heat medium that radiates heat from the high-temperature radiator , An engine as a device to be cooled, a second device to be cooled by a heat medium radiating heat by a low-temperature radiator, and a high-temperature side for circulating a heat medium between the high-temperature radiator and the first device to be cooled. A low-temperature side pipe for circulating a heat medium between the low-temperature radiator and the second apparatus to be cooled, wherein the low-temperature radiator header tank is located on the windward side of the high-temperature radiator header tank; 3. The heat transfer device for a vehicle according to claim 2, wherein the pipe extends through the header tank of the high-temperature radiator and is connected to the header tank of the low-temperature radiator.

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