JPH0547362U - Radiator with oil cooler - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the cooling efficiency of both the water passing through the water pipe and the oil passing through the oil cooler. The radiator is made compact. The oil cooler is fixed to the header body, no separate parts are required to seal between the joints and the peripheral wall of the header body, and the fixing work is unnecessary. [Constitution] Oil cooler 14 arranged in the lower header 3
Is provided with a flat hollow body 15 having a substantially U-shaped cross section, which is in close contact with the inner surface of the synthetic resin box-shaped header body 7. Flat hollow body 15
An oil inlet pipe joint (17) and an oil outlet pipe joint (18) penetrating the peripheral wall of the header body (15) are fixedly provided on the peripheral wall. The header body 15 and the oil cooler 14 are integrally molded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radiator with an oil cooler used for an automobile equipped with an automatic transmission and a hydraulic power steering device, for example, and more specifically, a top and bottom headers arranged vertically with a space between them. The present invention relates to a radiator with an oil cooler including a plurality of water pipes arranged in parallel between headers and having both ends connected to both headers, and an oil cooler arranged in a lower header.

In this specification, the left side of FIG. 1 is referred to as the front and the opposite side is referred to as the rear.

[0003]

[Prior Art]

 In vehicles equipped with automatic transmissions and hydraulic power steering devices, radiators with oil coolers as described above are used to cool the oil used in these devices. As an oil cooler used for the radiator with an oil cooler, conventionally, an oil cooler including an inner pipe and an outer pipe having a circular cross section and inner fins arranged between the pipes has been used.

Further, generally, as the radiator type, there are a type in which the water pipes are arranged in one row and a type in which the water pipes are arranged in two rows in front and rear. In the type in which the water pipes are arranged in one row, Although it is possible to reduce the width of both the upper and lower headers, the size of the oil cooler must be determined in consideration of the oil cooling performance of the automatic transmission and hydraulic power steering device, To maintain performance, its diameter is naturally determined. Therefore, the oil cooler of the same diameter was used in both the type with one row of water pipes and the type with two rows of water pipes.

[0005]

[Problems to be solved by the device]

 However, in the conventional radiator with an oil cooler, the oil inlet pipe joint and the outlet pipe joint fixedly mounted on the oil cooler are fixed separately in order to be fixed in a liquid-tight manner through the peripheral wall of the header body. There is a problem that the parts formed on the side become necessary and the work becomes troublesome.

Further, since the oil cooler has a circular cross section as a whole and is located directly below the lower end opening of the water pipe, the cooling water flowing into the lower header from the lower end opening of the water pipe hits the oil cooler. However, it becomes a flow obstacle and the pressure loss becomes very large. As a result, there is a problem that the flow rate of water is reduced, and the cooling efficiency of water passing through the water pipe and the cooling efficiency of oil passing through the oil cooler are both reduced.

Further, since the oil cooler having the same diameter is used in both the radiators of the type in which the water pipes are arranged in one row and the type in which the water pipes are arranged in two rows before and after, the water pipes are arranged in one line. The size of the lower header needs to be increased in the case of the radiator of the type described below, and the front and rear width of the lower header is much larger than the front and rear width of the core part. Even if the space was narrowed, the radiator could not be made compact, and there was a problem that the mounting space on the vehicle body was still the same as the type in which the water pipes were arranged in two rows.

An object of the present invention is to provide a radiator with an oil cooler that solves the above problems.

[0009]

[Means for Solving the Problems]

 The radiator with an oil cooler according to the present invention is composed of upper and lower headers which are vertically spaced from each other, a plurality of water pipes which are arranged in parallel between the headers and whose both ends are connected to both headers, and a lower header. In the radiator with an oil cooler in which the lower header is formed of a synthetic resin box-shaped header body and a header plate that closes the opening, the oil cooler is It consists of a flat hollow body with a substantially U-shaped cross section that is in close contact with the inner surface of the main body, and an oil inlet pipe joint and oil outlet pipe joint fixedly provided on the peripheral wall of the flat hollow body and penetrating the peripheral wall of the header body The header body and oil cooler are integrally formed.

[0010]

[Action]

 The oil cooler has a flat hollow body with a substantially U-shaped cross section that is in close contact with the inner surface of the header body, and an oil inlet pipe fitting and oil fixedly provided on the circumferential wall of the flat hollow body and penetrating the circumferential wall of the header body. Since it is composed of an outlet pipe joint, the water flowing into the lower header from the lower end opening of the water passage pipe is discharged from the outlet pipe through the substantially U-shaped upward opening portion of the oil cooler. Therefore, in the lower header, the oil cooler does not obstruct the flow of cooling water.

Further, since the flat hollow body has a substantially U-shaped cross section, even if the width before and after the flat hollow body is reduced, it is possible to prevent the heat exchange performance from being lowered by increasing the height accordingly.

Further, since the header body and the oil cooler are integrally formed, separate parts are required to fix the oil cooler to the header body and to seal between both joints and the peripheral wall of the header body. Moreover, the fixing work becomes unnecessary.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the radiator with an oil cooler according to this idea is applied to a radiator with an oil cooler having only an oil cooler for an automatic transmission. In the following description, the term "aluminum" includes aluminum alloy as well as pure aluminum.

FIG. 1 shows a lower header portion, and FIG. 2 shows the entire structure of a radiator with an oil cooler.

In FIG. 2, the radiator (1) with an oil cooler is arranged in parallel between the upper and lower headers (2) and (3), which are vertically arranged at a predetermined interval, and between the headers (2) and (3). The flat water pipes (4) made of aluminum, which are arranged in a row and whose both ends are connected to both headers (2) and (3), and the aluminum pipes that are placed between adjacent water pipes (4) Consists of a corrugated fin (5).

Each of the headers (2) and (3) is composed of a box-shaped header body (6) (7) made of synthetic resin and an aluminum header plate (8) (9) closing its opening. . The header body (6) of the upper header (2) is provided with an engine cooling water inlet pipe joint (11) and a cooling water injection port (12). The header body (7) of the lower header (2) is provided with an engine cooling water outlet pipe joint (13). An oil cooler (14) having a substantially U-shaped cross section is arranged in the lower header (3) of the radiator (1).

The oil cooler (14) is provided inside the flat hollow body (15) and the flat hollow body (15) made of aluminum and having a substantially U-shaped cross section which is in close contact with the inner surface of the header body (7). Aluminum corrugated inner fins (16). An oil inlet (15a) and an outlet (not shown) are formed on the peripheral wall of the flat hollow body (15) in contact with the inner surface of the header body (7), and the oil on the outer surface of the peripheral wall of the flat hollow body (15) is formed. Aluminum inlet joints (17) and oil outlet joints (18) are brazed around the inlet (15a) and the outlet. The oil inlet pipe joint (17) and the oil outlet pipe joint (18) extend through the peripheral wall of the header body (7) to the outside. The oil cooler (14) and the header body (7) of the lower header (3) are integrally formed by, for example, the insert molding method.

In such a radiator (1), the high-temperature cooling water returned from the engine enters the upper header (2) through the inlet pipe joint (11), and passes through the water pipe (4) to lower header (3). ), It is cooled by the outside air and sent to the engine from the outlet pipe joint (13). The hydraulic fluid for the automatic transmission enters the flat hollow body (15) through the inlet pipe joint (17), and exits from the outlet pipe joint (13). The working oil is cooled by chilled cooling water in the lower header (3) of the radiator (1) while passing through the flat hollow body (15).

[0019]

[Effect of the device]

 According to the radiator with an oil cooler of the present invention, as described above, the oil cooler does not obstruct the flow of the cooling water in the lower header, so that the pressure loss becomes extremely small. Therefore, the flow of water becomes smooth, the flow rate of water increases, and both the cooling efficiency of water passing through the water pipe and the cooling efficiency of oil passing through the oil cooler are improved.

Further, even if the width of the flat hollow body is made small, if the height is made correspondingly high, it is possible to prevent deterioration of the heat exchange performance. Therefore, for example, in order to reduce the weight of the radiator, the core is reduced. When the water pipes of the part are arranged in one row, the width of the lower header can be reduced according to the width of the core part. Therefore, the radiator can be made compact, and the radiator installation space can be made smaller than that of the conventional radiator.

Further, since the header body and the oil cooler are integrally formed, separate parts are required to fix the oil cooler to the header body and to seal between both joints and the peripheral wall of the header body. Moreover, the fixing work becomes unnecessary.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a lower header of a radiator with an oil cooler according to the present invention.

FIG. 2 is a perspective view showing an overall configuration of a radiator with an oil cooler.

[Explanation of symbols]

 1 Radiator with oil cooler 2 Upper header 3 Lower header 4 Water pipe 7 Synthetic resin box-shaped header body 9 Header plate 14 Oil cooler 15 Flat hollow body 17 Oil inlet pipe joint 18 Oil outlet pipe joint

Claims (1)

[Scope of utility model registration request] 1. An upper and lower header arranged vertically at intervals, a plurality of water pipes arranged in parallel between the headers and having both ends connected to the header, and arranged in a lower header. In a radiator with an oil cooler in which the lower header is composed of a synthetic resin box-shaped header body and a header plate that closes the opening, the oil cooler is closely attached to the inner surface of the header body. It consists of a flat hollow body having a substantially U-shaped cross section and an oil inlet pipe joint and an oil outlet pipe joint fixedly provided on the peripheral wall of the flat hollow body and penetrating the peripheral wall of the header body. Radiator with oil cooler that has a cooler integrally molded.