JPH068711U - Oil cooler - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the cooling performance of an oil cooler cooled by engine cooling water. [Constitution] A box body 4 is installed in a cooling water passage 2 for feeding engine cooling water from an engine to a radiator, and the box body 4 is vertically divided by a partition plate 5 having a small hole 8 formed therein.
The passage 2 opens in the upper chamber 6, the heat exchange elements 10 and 11 are installed in the lower cooling water pool 7, and the high temperature oil guided to the heat exchange elements 10 and 11 stays in the cooling water pool 7. Is cooled by boiling and evaporating.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil cooler attached to a vehicle engine or the like.

[0002]

[Prior art]

 A conventional oil cooler that cools vehicle engine lubrication oil and auto transmission oil, when the air-cooled type is installed in front of the radiator, reduces the wind speed of the radiator, increases the wind speed unevenness, and increases the temperature of the air flowing into the radiator. In addition, there are drawbacks such as rising, long oil piping to the front of the radiator, and in the case of the water cooling type installed in the radiator lower tank or near the oil filter, the amount of cooling water received by cooling the oil increases However, in the case of an oil cooler that is cooled by forced convection heat transfer, the above-mentioned problems will occur. Was unavoidable.

[0003]

[Problems to be solved by the device]

 The present invention aims to improve the cooling performance of an oil cooler cooled by an engine coolant.

[0004]

[Problems to be solved by the device]

 For this reason, the oil cooler according to the present invention is provided with an engine cooling liquid reservoir installed below the engine cooling liquid passage for supplying engine cooling liquid from the engine to the radiator, the engine cooling liquid reservoir and the engine cooling liquid passage described above. An engine that has a narrow flow path that communicates with and a heat exchange element that is installed in the engine coolant pool and that guides oil, and that stays in the engine coolant pool by the oil that flows through the heat exchange element The cooling liquid is configured to evaporate by boiling.

[0005]

[Action]

 That is, since the engine cooling liquid pool communicates with the engine cooling liquid passage by the narrow flow passage, the engine cooling liquid pools in the engine cooling liquid pool, and therefore the high temperature introduced into the heat exchange element is high. The oil in the engine coolant can easily boil and evaporate in the engine coolant pool to cool the oil well, and the steam generated in the engine coolant pool passes through the flow path to cool the engine above. The liquid flows into the liquid passage, mixes with the engine cooling liquid in the passage and is condensed, and the engine cooling liquid is replenished into the engine cooling liquid reservoir through the flow passage from the engine cooling liquid passage.

[0006]

【Example】

 Hereinafter, embodiments of the present invention shown in the drawings will be specifically described. In FIGS. 1 and 2, unsaturated engine cooling water is sent from a mounted engine (not shown) through a passage 2 to a radiator 1 attached to the front of the vehicle, and cooling water cooled by the radiator 1 returns. Although it is sent back to the engine through the passage 3, a box body 4 is installed in the middle of the passage 2.

The box body 4 is divided into an upper chamber 6 and a lower chamber 7 by a partition plate 5, and both chambers 6 and 7 are communicated with each other by a large number of small holes 8 formed in the partition plate 5. While the passage 2 is open to the cooling water, the cooling water flows into the lower chamber 7 from the upper chamber 6 through the small holes 8 and stays there, so that the lower chamber 7 collects the cooling water. I am configuring.

Further, heat exchange elements 10 and 11 are installed in the cooling water pool 7, high temperature oil that lubricates the engine is introduced to the heat exchange element 10, and the heat exchange element 11 flows out from the automatic transmission. High temperature oil is introduced, and these oils are cooled by the cooling water in the cooling water pool 7.

At this time, since the cooling water stays in the cooling water pool 7, the cooling water in contact with the heat exchange elements 10 and 11 is easily heated by the heat received from the high-temperature oil and boiled to evaporate. The water vapor generated in the water pool 7 rises and passes through the small holes 8 and mixes with the unsaturated cooling water flowing in the passage 2 to be rapidly condensed and returned to the cooling water, and also to the cooling water pool 7. Unsaturated cooling water is replenished from 2 through the small holes 8. That is, since the cooling of the oil in the heat exchange elements 10 and 11 is performed by the boiling heat transfer of the cooling water, the heat transfer coefficient is very large and the cooling performance of the oil by the cooling water is significantly improved. Oil can be cooled effectively even when the temperature difference with water is small.

Further, when the temperature of the oil is relatively low as when the engine is started, the oil in the heat exchange element 10 can be heated relatively quickly by the cooling water in the cooling water pool 7, The lubricity of the engine is improved, the friction loss of each part is reduced, and the fuel efficiency of the engine can be easily improved.

Next, the embodiment shown in FIG. 3 will be described by giving the same reference numerals to the same parts as those of the above embodiment. In this case, the cooling water pool 20 is installed below the passage 2 through which the unsaturated engine cooling water flows, and the passage 2 and the cooling water pool 20 are communicated with each other by the narrow flow passage 21. The heat exchange elements 10 and 11 are installed, and the high temperature oil that lubricates the engine is introduced to the heat exchange element 10, while the high temperature oil that has flowed out from the automatic transmission is introduced to the heat exchange element 11 and these oils are cooled. Cooled by the cooling water staying in the water pool 20, the cooling water is boiled and evaporated, and the generated water vapor rises to pass through the flow path 21 and mix with the unsaturated cooling water flowing in the passage 2 to be rapidly condensed. However, it is configured to return to the cooling water, and it is possible to achieve the same operational effect as that of the above-described embodiment.

[0012]

[Effect of device]

 In the oil cooler according to the present invention, the high temperature oil introduced into the heat exchange element is cooled by the engine cooling liquid staying in the engine cooling liquid pool, and the engine cooling liquid can be easily boiled and evaporated. Therefore, the cooling power of oil by the engine coolant is extremely large, and the oil can be effectively cooled.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part in an embodiment of the present invention.

FIG. 2 is an overall perspective view of the above embodiment.

FIG. 3 is a schematic vertical sectional view of an essential part in another embodiment of the present invention.

[Explanation of symbols]

 1 radiator 2 cooling water passage 4 box 5 partition plate 6 upper chamber 7 cooling water pool 8 small hole 10 heat exchange element 11 heat exchange element 20 cooling water pool 21 flow path

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tetsuji Ukita 5-3-8, Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation

Claims (1)

[Scope of utility model registration request] 1. An engine cooling liquid pool installed below an engine cooling liquid passage for supplying engine cooling liquid from an engine to a radiator, and a narrow flow passage communicating between the engine cooling liquid pool and the engine cooling liquid passage. It has a heat exchange element that is installed in the engine coolant pool and guides oil, and is configured such that the oil that flows in the heat exchange element causes the engine coolant that accumulates in the engine coolant pool to evaporate by boiling. Oil cooler.