JPH0976734A - On-vehicle condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat exchange performance of a radiator. SOLUTION: In the on-vehicle condition of a condenser arranged adjacent to the front side of a radiator, the air flow resistance of an intermediate core part C1 in the vertical direction opposite to a bumper provided on the front side becomes relatively smaller than the passing resistance on upper and lower core parts C2, C2 except this. Corrugated fins 11..., 12..., 12... of different pitch are mounted on the respective core parts C1, C2, C2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted condenser mainly used as a car cooler condenser.

[0002]

2. Description of the Related Art As an on-vehicle car cooler condenser used in an automobile, for example, a heat exchanger (59) called a multi-flow type as shown in FIG. 5 is known.
The heat exchanger (59) includes a plurality of tubes (51) arranged in parallel at predetermined intervals, and the tubes (51).
A pair of hollow headers (52) (52) connected in communication with both ends of the tube and corrugated fins (53) disposed between the tubes (51). Then, the interior of the headers (52) (52) is divided into a plurality of chambers in the longitudinal direction by the partition members (54) ... And the headers (52) (52)
The refrigerant inlet part (55) and the refrigerant outlet part (56) are connected to each other so that the gas refrigerant flowing into the inside through the inlet part (55) meanders through the tubes (51). The heat is exchanged with the air that flows in the front-rear direction in the process, is cooled and condensed, and is discharged from the outlet portion (56).

For example, the condenser (59) is arranged adjacent to the front side of the radiator (57) in the automobile as shown in FIG. In this condenser (59), the refrigerant flowing through the inside of the condenser (59) is in operation in this arrangement state.
The air (A) is heat-exchanged with the ambient temperature air (A) introduced through (0) and condensed, and the temperature of the air (A) is raised to some extent by the heat exchange. Radiators (57)
Then, the cooling liquid flowing through the inside thereof is cooled by passing through the condenser (59) and exchanging heat with the air whose temperature is raised to some extent as described above. Incidentally, (61) is a bumper.

[0004]

However, in the above-mentioned arrangement, the condenser (59) and the radiator (57) are arranged.
When the heat exchange is performed in the above manner, there is a problem that the heat exchange performance of the radiator (57) is reduced for the following reason.

That is, in front of the condenser (59), the bumper (61) exists corresponding to the intermediate area in the height direction. Therefore, the radiator grille (60) (6
The natural flow of the air (A) introduced through (0) is obstructed by the bumper (61), and the air (A) flows through the bumper (61).
It is introduced by dividing it into upper and lower parts by sandwiching. Therefore, the air whose temperature has risen after passing through the condenser (59) can effectively flow only to the upper core portion and the lower core portion of the radiator (57) excluding the middle portion in the height direction. Since the air (A) raises the temperature of the condenser (59) to some extent, the heat exchange in the radiator (57) is not efficiently and sufficiently performed.

In view of the above conventional problems, it is an object of the present invention to provide a vehicle-mounted condenser having a structure capable of efficiently performing heat exchange in a radiator.

[0007]

An on-vehicle condenser disposed adjacent to the front side of a radiator and adapted to an obstacle that obstructs the flow of air that is present on the front side in a vehicle mounted state. The in-vehicle condenser is characterized in that the air passage resistance of the core portion is smaller than the passage resistance of the other core portions.

That is, as described above, since the air passage resistance of the core portion corresponding to the obstacle is relatively smaller than the passage resistance of the other core portions, A part of the air, which has been changed in flow and was going to the core part other than the core part corresponding to the obstacle, changes the flow to the core part corresponding to the obstacle, and the core part corresponding to the obstacle is changed. Come to pass. Therefore, in the radiator, air also passes through the core portion corresponding to the obstacle, and even if the temperature of the air is raised by passing through the condenser, the cooling liquid inside the radiator is efficiently cooled. , The heat exchange efficiency in the radiator is improved.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 3, a vehicle-mounted heat exchanger (2) is used as a radiator (1) in an automobile, for example.
Is disposed adjacent to the front side of the. In the installed state, the condenser (2) has a bumper (3) as an obstacle on the front side thereof, and a radiator for ventilation on both upper and lower sides of the bumper (3). The grills (4) (4) are open. The height of both the radiator (1) and the condenser (2) is designed to be higher than the height of the bumper (3), and the radiator (1) and the condenser (2) are arranged so as to project on both upper and lower sides of the bumper (3).

The on-vehicle condenser (2) is a heat exchanger made of aluminum, which is the multi-flow type heat exchanger described above. As shown in FIG. 1, in this condenser (2), (5) ... Is a tube, (6) and (6) are hollow headers, (7) ... is a partition member, and (9) is a refrigerant inlet portion,
(10) is the exit, and (11), (12) and (12) are fins.

A plurality of tubes (5) are provided, each of which is a flat tube having an oval cross section. These tubes (5) are respectively oriented in the left-right direction and are arranged in parallel in the vertical direction at predetermined intervals.
Both ends thereof are connected to the left and right hollow headers (6) (6) in a communicating state. Although not shown, the tube (5) is divided into a plurality of chambers in the width direction by a partition wall, and as such a tube, for example, an aluminum extrusion type harmonica tube is used. In addition, an electric resistance welded tube may be used.

Each of the hollow headers (6) and (6) has a cylindrical header pipe (6a) and lid members (6b) and (6b) in which both ends of the pipe (6a) are sealed by brazing.
And is constituted by. The end portions of the tubes (5) are inserted into a plurality of circumferential slit-shaped tube insertion holes formed at predetermined intervals in the inner peripheral side wall portions of the header pipes (6a) (6a). The headers (6) (6) and the tubes (5) ... Are connected in a communicating state by being inserted, fitted and collectively brazed. As the header pipes (6a) (6a), for example, a brazing pipe which is configured by arranging aluminum brazing sheets in which a brazing material layer is clad on one side or both sides of a core material in a state where both side edges are butted against each other is suitable. Used. In addition, when the heat exchanger assembly is collectively brazed, the both side edge butted portions are collectively brazed and joined together. In addition, an electric resistance welded pipe made of an aluminum brazing sheet or an extruded pipe may be used.

Further, the partition member (7) is inserted into the header (6) (through the circumferential slit-shaped partition member insertion hole formed at the predetermined high position on the outer peripheral side wall of each header pipe (6a) (6a). 6) is arranged and brazed, and the inside of the headers (6) and (6) is divided into a plurality of chambers in the length direction. Furthermore, the header (6)
A refrigerant inlet portion (9) and an outlet pipe (10) are provided at a predetermined height position of (6). With such a configuration,
The refrigerant that has flowed in from the inlet portion (9) circulates in a zigzag manner through the tubes (5) ... Group and exits from the outlet portion (10). In the present condenser, in order to improve its heat exchange performance, the internal refrigerant passage formed by the tubes (5) ... Group decreases from the inlet (9) toward the outlet (10), and the number of tubes decreases. Depending on the configuration, the area of the refrigerant passage becomes smaller.

The fins (11) ... (12) ... (12) ... are corrugated fins made of an aluminum brazing sheet and are provided between the tubes (5) ... and outside the outermost tube (5). , And the tube (5) are joined and integrated by brazing.

The fins (11) ... (12) ...
Of the fins (12), the fins (11) are arranged as large pitch fins in the middle region in the height direction of the condenser (2), and the fins (12), (12), ... Are arranged as small pitch fins in the middle region. It is placed in each of the upper and lower areas sandwiching the. That is,
As shown in FIG. 3, the intermediate height region core portion (C1) in which the large pitch fins (11) are arranged has a bumper (3) on the front side thereof facing the intermediate height region. While existing and the air passage resistance of the core portion (C1) is reduced, the upper and lower height region core portions (C2) (where the small pitch fins (12) ... (12) ... Are disposed. C2
), Radiator grills (4) and (4) into which air is introduced are provided facing each other on the front side, and the air passage resistance of these core portions (C2) (C2) is increased. Specifically, for example, as shown in FIG.
The fin pitch P1 of the fins (11) ... As the large pitch fins is set to 1.9 mm, and the fin pitch P2 of the fins (12).
Is set to 1.5 mm.

In the on-vehicle condenser having the above structure, as shown in FIG. 3, the flow of air (A) is divided by the bumper (3) and introduced into the inside through the upper and lower radiator grills (4) and (4). Will come. Then, the air (A) is supplied to the radiator grilles (4) and (4) in the condenser (2).
Tries to pass through the condenser (2) through the upper and lower core portions (C2) (C2) facing the core portion (C2).
(C2) has its fins (12) ... (12) as described above.
The fin pitch of ... Is set to be small and the passage resistance of the air (A) is set to be relatively large, while the core portion (C in the intermediate height region facing the bumper (3) is formed).
In 1), the fin pitch of the fins (12) ... (12) ... Is set to be large, and the passage resistance of the air (A) is relatively small. Therefore, the upper and lower core portions (C2) (C2) facing the radiator grills (4) (4)
), A part of each of the upper and lower air (A) introduced into the front space of the condenser (2) changes its flow direction to the core part (C1) in the intermediate height region, and as a result, the radiator Air (A) passes through not only the upper and lower core portions (C2) (C2) facing the grills (4) and (4) but also the core portions (C1) in the intermediate height region. Therefore, in the front part space of the radiator (1), the air (A) is introduced evenly in the vertical direction in spite of the presence of the bumper (3), and the core part of the radiator (1) is substantially omitted as a whole. The heat is efficiently exchanged in the radiator (1) as it passes evenly. In this way, heat exchange in the condenser (2) is also efficiently performed.

In the above embodiment, a multi-flow type heat exchanger is used as the condenser, but a heat exchanger called a serpentine type is formed by bending one tube in a meandering shape. And so on. Further, in the above embodiment, the bumper is assumed as the obstacle, but the obstacle in the present invention is determined depending on what the obstacle to be present on the front side of the condenser is, The bumper is one example, and it may be other than the bumper depending on the vehicle body structure. Therefore, how to change the air passage resistance in the core part is also what the target of the obstacle is, what kind of shape and size the obstacle is, and how the air flow depends on the obstacle. Therefore, as shown in FIG. 4, each fin (15) has its longitudinal middle portion (15a) depending on the presence of obstacles. ), The fin pitch is reduced, and both side portions (15b) (15b) sandwiching the intermediate portion (15a)
In some cases, the fin pitch is increased, and the fins (15) having such a structure are arranged between the tubes (5). Further, in the above-described embodiment, the fin pitch of the fins is made different in order to make the air passage resistance different, but in addition, the direction of the louvers of the fins is made different, or the plate fin is made different by the core portion. It can be used by combining different types of fins, such as by using corrugated fins, or by changing the interval between the tubes (5) ... by the core part to make the fins different in height. Various components may be operated.

[0019]

As described above, in the vehicle-mounted condenser of the present invention, the air passage resistance of the core portion corresponding to the obstacle obstructing the air flow, which is present on the front side in the vehicle-mounted state, is reduced. Since it is configured to be relatively smaller than the passage resistance in the core part other than, the flow was changed by the obstacle, and the core part other than the core part corresponding to the obstacle was going to be headed. A portion of the air diverts to the core portion corresponding to the obstacle and passes through the core portion corresponding to the obstacle. Therefore, in the radiator, air also passes through the core portion corresponding to the obstacle, and even if the temperature of the air is raised by passing through the condenser, the cooling liquid inside the radiator is efficiently cooled. The heat exchange efficiency in the radiator can be improved.

[Brief description of drawings]

FIG. 1 shows an entire condenser according to an embodiment, FIG. 1 (a) is a front view, and FIG. 1 (b) is a side view.

FIG. 2 is an enlarged front view showing a core portion.

FIG. 3 is a side view showing an on-vehicle state of the condenser.

FIG. 4 is a front view of a condenser core according to another embodiment.

FIG. 5 shows a condenser according to a conventional example, which is shown in FIG.
Is a front view, and FIG.

FIG. 6 is a side view showing an on-vehicle state of the condenser.

[Explanation of symbols]

 1 ... Radiator 2 ... Automotive condenser 3 ... Bumper 4 ... Radiator grill 11 ... Large pitch fin 12 ... Small pitch fin C1 ... Core portion with low air passage resistance C2 ... Core portion with high air passage resistance

Claims (1)

[Claims] 1. An on-vehicle condenser disposed adjacent to a front side of a radiator, the core portion of a core portion corresponding to an obstacle that obstructs an air flow to be present on the front side in a vehicle mounted state. An on-vehicle condenser characterized in that the passage resistance of air is relatively smaller than the passage resistance of the other core portions.