JPS6328204B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling technique for preventing engine seizure, output reduction, etc. caused by engine overheating.

Conventionally, when cooling engine components such as the engine casing or associated fluids such as engine cooling water and combustion air, it has been conventionally cooled by heat exchange with air (air cooling) or by cooling with cooling water. Cooling through heat exchange (water cooling) has been adopted, but in the former case, the engine components or the associated fluid are cooled with the air around the engine, so the cooling efficiency is low, especially When the engine is installed in a place with poor air flow, such as a machine room, the ambient temperature increases due to engine radiant heat, which has the disadvantage that cooling efficiency tends to further deteriorate.
In the latter case, a large amount of cooling water is required to cool the engine components or the fluid associated with them.
It has the disadvantage that it cannot be applied in places where water is difficult to obtain.

In view of the above-mentioned circumstances, the present invention is designed to rationally cool engine components or the fluid associated therewith, regardless of the conditions of the installation location of the engine and without using any special drive source. The purpose is to provide a turbine driven by the exhaust gas of the engine, and the turbine and a refrigerant compression compressor are interlocked and connected, and the refrigerant circulated by the compressor is The engine is characterized in that it is provided with a heat exchange section that cools the engine components or the fluid accompanying them by heat exchange with the engine components.

In other words, not only can engine components or the associated fluid be continuously cooled by using the latent heat of condensation of a certain amount of refrigerant circulated by the compressor, but also the engine components or the associated fluid can be continuously cooled. can be driven using the velocity energy of engine exhaust gas.

Therefore, it has become possible to efficiently and economically cool the engine components or their associated fluids, regardless of the conditions of the installation location of the engine, and without using any special drive source.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, the engine cooling system consists of two systems of exhaust pipes 3 and 3 connected to the exhaust manifold 1A of the engine 1 via a flow divider 2 whose flow rate can be adjusted.
A turbine 5 driven by engine exhaust gas is provided in one of the exhaust pipes 3, and the turbine 5 and a refrigerant compression compressor 6 are interlocked and connected, and the refrigerant circulation of the compressor 6 is A condenser 7, an expansion valve 8, and a heat exchange section 9 are interposed in the path a to evaporate the refrigerant that has passed through the condenser 7 through heat exchange with engine cooling water, which is an example of an engine accompanying fluid, and to cool the engine cooling water. ing.

The latent heat of condensation of the refrigerant during heat exchange in the condenser 7 may be disposed of into the outside air, but it may also be used as a heating source for space heating or hot water supply.

As another embodiment, the heat exchange section 9 and a heat exchanger that cools the engine cooling water by heat exchange with air may be used together.

In the above embodiment, the engine cooling water was cooled using the latent heat of vaporization of the refrigerant, but instead of this, as shown in another embodiment in FIG. The heat exchanger 9 may be inserted into the engine 10 to cool the combustion air taken into the engine by using the latent heat of vaporization of the refrigerant after passing through the expansion valve 8. The present invention may be configured and implemented to cool engine components such as the casing.

[Brief explanation of the drawing]

Figure 1 is a piping system diagram showing the engine cooling system.
FIG. 2 is a piping system diagram showing another embodiment. 1...Engine, 5...Turbine, 6...Compressor, 9...Heat exchange section.

Claims (1)

[Scope of Claims] 1. A turbine 5 driven by the exhaust gas of the engine 1 is provided, and the turbine 5 and a refrigerant compression compressor 6 are interlocked and connected, and the refrigerant is circulated and flowed by the compressor 6. An engine cooling device characterized in that it is provided with a heat exchange section 9 that cools an engine component or a fluid accompanying it by heat exchange with the engine component. 2. The engine cooling device according to claim 1, wherein the accompanying fluid is engine cooling water. 3. The engine cooling device according to claim 1, wherein the accompanying fluid is engine lubricating oil. 4. The engine cooling device according to claim 1, wherein the accompanying fluid is intake combustion air. 5. The engine cooling device according to claim 1, wherein the engine component is an engine casing.