KR20100037080A

KR20100037080A - The cooling system for engine exhaust gas of vehicle using evaporating heat of refrigerant

Info

Publication number: KR20100037080A
Application number: KR1020100024990A
Authority: KR
Inventors: 임효진
Original assignee: 임효진
Priority date: 2010-03-21
Filing date: 2010-03-21
Publication date: 2010-04-08

Abstract

The present invention introduces a method of cooling latent heat using water in an existing water-cooled engine exhaust gas cooling system using latent heat, which is a refrigerant vaporization heat such as water, antifreeze, freon refrigerant, natural refrigerant, and liquefied gas. The present invention relates to an engine exhaust gas cooling system using refrigerant vaporization heat for cooling a gas.
Exhaust gases contain many harmful gases. The catalytic converter 14 serves to convert the harmful gas contained in the exhaust gas into a harmless gas by using a catalyst. An appropriate operating temperature of the catalytic converter 14 currently being used is about 600 ° C. At about 800 ° C, the component melts, so cooling is required when exhaust gas is discharged at a higher temperature. In addition, the energy emitted by the exhaust gas is about 30% of the fuel, which is almost the same as the energy converted from the engine to power, so it is very important to regenerate the energy contained in the exhaust gas.
In the present invention, the refrigerant jacket 21 is installed to surround the exhaust pipe so that the devices installed in the exhaust system such as the catalytic converter 14 can be operated at a proper operating temperature to fill the refrigerant therein and cool it using the refrigerant vaporization heat. . The circulation of the refrigerant introduces a natural circulation method using waste heat provided from the exhaust pipe.In addition, the energy emitted from the exhaust gas is about 30% of the fuel, which is almost the same as that of the engine. Energy efficiency has been dramatically increased by allowing thermal energy, mechanical energy and electrical energy to be recovered from the waste heat.

Description

The cooling system for engine exhaust gas of vehicle using evaporating heat of refrigerant

Engine exhaust gas cooling field

Exhaust gases contain hot heat and many harmful gases. The catalytic converter 14 serves to convert harmful gas contained in the exhaust gas into a harmless gas by using a catalyst. The catalytic converter 14 currently in use has an appropriate operating temperature of about 600 ° C. At about 800 ° C, the component melts, so cooling is required when exhaust gas is discharged at a higher temperature. The energy emitted by the exhaust gas is about 30% of the fuel, which is almost the same as the energy converted from the engine to power. Until now, water cooling has been adopted for exhaust system cooling. Publication No. 1994-0015163 [Exhaust gas cooling device of a diesel engine-mounted vehicle] proposes a method of cooling exhaust gas using a water pipe connected to an engine cooling radiator. Patent No. 20-0185364 [Exhaust gas cooler of an engine forklift] also discloses a method of cooling exhaust gas by using a cooling tube through which water passes, but a method of using refrigerant vaporization heat has not yet been invented.

In the present invention, the exhaust pipe is cooled by using refrigerant vaporization heat so that the catalytic converter 14 can be operated at an appropriate operating temperature. The circulation of the refrigerant introduces a natural circulation method by waste heat provided in the exhaust pipe. In addition, the energy emitted from the exhaust gas is about 30% of the fuel, which is almost the same as the energy converted from the engine to power. Therefore, energy efficiency can be recovered by recovering thermal energy, mechanical energy, and electrical energy from the waste heat of the exhaust gas. To increase it.

The refrigerant jacket 21 is installed to surround the exhaust pipe and forms a refrigerant accommodating space 61, and a condenser 22 is installed on the refrigerant jacket 21 to circulate the refrigerant between the refrigerant jacket 21 and the condenser 22. It is connected by piping so that a closed circuit is formed, and the refrigerant which can be boiled by the exhaust gas of the exhaust pipe is filled in the refrigerant accommodating space 61 of the refrigerant jacket to cool the exhaust gas using the heat of vaporization of the refrigerant.

The catalytic converter 14 is installed in the exhaust system. The catalytic converter 14 converts harmful gas contained in the exhaust gas into a harmless gas by using a catalyst. The catalytic converter 14 currently in use has an appropriate operating temperature. It is about 600 ° C. At about 800 ° C, the component melts, so cooling is required when exhaust gas is discharged at a higher temperature. Therefore, the present invention provides a cooling function for maintaining the proper temperature so that the catalytic converter 14 operates smoothly. In addition, the energy emitted by the exhaust gas is about 30% of the fuel, almost as much as the energy converted from the engine to power. In the present invention, the refrigerant is vaporized by the heat of the exhaust pipe, and the energy efficiency is increased by producing dynamic energy or electric energy in the turbine / turbine chamber 31 by using the pressure of the vaporized gas refrigerant. In addition, the interior of the car by the wind coming from the condenser 22 to allow the energy to be recycled in the form of thermal energy. Therefore, the present invention has contributed to greatly improving the energy efficiency by improving the performance of the catalytic converter 14 which plays an important function in the automobile through cooling and recovering the energy contained in the exhaust gas.

1 is a schematic explanatory diagram of an automobile exhaust system.
2 is an explanatory view of an engine exhaust gas cooling system using the refrigerant vaporization heat of the present invention.
3 is a diagram illustrating a case where a turbine / turbine chamber and a refrigerant tank are added.
4 is a diagram illustrating a case where a cooling system is installed in a catalytic converter front exhaust pipe.
5 is a diagram illustrating an example in which a cooling system is installed in a catalytic converter front exhaust pipe and a turbine / turbine chamber and a refrigerant tank are added.
6 is an explanatory diagram illustrating an example of a coupling structure of an exhaust pipe and a refrigerant jacket.

1 is a schematic explanatory diagram of an automobile exhaust system. The engine 11 is provided with a manifold 12 that collects exhaust gas generated from the engine 11 and an exhaust pipe is connected to the manifold 12. The catalytic converter 14 is based on the catalytic converter 14. It is divided into a catalytic converter front exhaust pipe 13 installed at the front and a catalytic converter rear exhaust pipe 15 installed at the rear of the catalytic converter 14. The catalytic converter 14 serves to convert harmful gas contained in the exhaust gas into a harmless gas by using a catalyst. The catalytic converter 14 currently in use has an appropriate operating temperature of about 600 ° C. At about 800 ° C, the component melts, so cooling is required when exhaust gas is discharged at a higher temperature. The energy emitted by the exhaust gas is about 30% of the fuel, which is almost the same as the energy converted from the engine to power.

2 is an explanatory view of an engine exhaust gas cooling system using the refrigerant vaporization heat of the present invention. In order to absorb heat well from the exhaust pipe, a coolant jacket 21 is formed to form a refrigerant accommodating space 61 in combination with the outside of the exhaust pipe while covering a part of the exhaust pipe. Here, the exhaust pipe is one of the catalytic converter rear exhaust pipe 15 or the catalytic converter front exhaust pipe 13. FIG. 2 shows a case where the refrigerant jacket 21 is installed in the catalyst converter rear exhaust pipe 15. As shown in FIG. A condenser 22 having a refrigerant circulation passage is installed on the upper portion of the refrigerant jacket 21, and a cooling fan 28 is installed to provide wind to the condenser 22, and the upper outlet pipe and the condenser 22 of the refrigerant jacket 21 are installed. The upper withdrawal pipe is connected to each other through the gas pipe 23 and the refrigerant jacket 21, the lower withdrawal pipe and the condenser 22, the lower withdrawal pipe is connected to each other through the liquid pipe 24. A gas outlet port (26) with a valve is installed on one side of the upper pipe of the gas pipe (23), and a liquid with a valve is provided to allow the liquid refrigerant in the cooling system to flow out on one side of the lower pipe of the liquid pipe (24). Install the outlet 25. A cooling control valve 27 having a temperature control device is installed on the gas pipe 23 and the liquid pipe 24 so as to adjust the cooling performance. In the cooling system refrigerant circulation circuit formed of the refrigerant jacket 21, the gas pipe 23, the condenser 22, and the liquid pipe 24 again, the refrigerant jacket 21 is located in a space excluding the condenser 22. The condenser 22 is vacuumed by filling a refrigerant (not shown) that can be boiled by waste heat received from the exhaust pipe 21 and heating the refrigerant to discharge air through the gas outlet 26. The refrigerant is also included in the scope of the present invention using one of water, antifreeze additive, freon refrigerant, natural refrigerant, and liquefied gas. The warm wind generated from the condenser 22 may be used for heating a car interior to recycle thermal energy that is discarded as exhaust gas. The principle of operation is as follows. When exhaust gas flows into the catalytic converter rear exhaust pipe 15, which is an exhaust pipe, the refrigerant filled in the refrigerant jacket 21 receives heat from the exhaust gas and vaporizes while receiving vaporization of heat from the exhaust gas. ) Cool the internal exhaust gas. The gaseous refrigerant vaporized in the refrigerant jacket 21 flows into the condenser 22 through the gas pipe 23 to discard heat, and the refrigerant that is liquefied and turned into liquid is returned to the refrigerant jacket 21 through the liquid pipe 24 by gravity. ) It enters the bottom and finishes one cycle of cooling. It is a natural circulation method because refrigerant is circulated by waste heat and gravity of exhaust gas. Since the circulation rate of the refrigerant is determined by the excessive heat of the exhaust gas, it is a very efficient cooling system.

3 is a diagram illustrating a case where a turbine / turbine chamber and a refrigerant tank are added. In FIG. 2, a turbine / turbine chamber 31 is additionally installed in the conduit between the cooling control valve 27 and the condenser 22 installed in the gas pipe 23, and the cooling control valve 27 installed in the liquid piping 24. ) And the additional refrigerant tank 32 is installed in the conduit 22 between the condenser 22 and the condenser 22. The turbine / turbine chamber 31 has a turbine installed in the turbine chamber so that the dynamic energy generated when the turbine is rotated by the gas refrigerant is discharged to the outside by the shaft or the magnet coupling. Therefore, by using the pressure of the gas refrigerant to turn the turbine in the turbine chamber can be produced mechanical energy or electrical energy outside the pipe. The coolant tank 32 serves to stably supply the coolant to the coolant jacket 21.

4 is a diagram illustrating a case where a cooling system is installed in a catalytic converter front exhaust pipe. In FIG. 2, the coolant jacket 21 is provided in the catalyst converter front exhaust pipe 13. The remaining operation principle is as described in FIG.

5 is a diagram illustrating an example in which a cooling system is installed in a catalytic converter front exhaust pipe and a turbine / turbine chamber and a refrigerant tank are added. In FIG. 3, the refrigerant jacket 21 is provided in the catalytic converter front exhaust pipe 13. The remaining operation principle is as described in FIG.

6 is an explanatory diagram illustrating an example of a coupling structure of an exhaust pipe and a refrigerant jacket. The refrigerant jacket 21 is formed to surround the catalyst converter front exhaust pipe 13 or the catalyst converter rear exhaust pipe 15 as exhaust pipes and is installed to form a refrigerant accommodating space 61 surrounded by the exhaust pipe outer side and the refrigerant jacket 21. .

11 engine 12 manifold
13: catalytic converter front exhaust pipe 14: catalytic converter
15 catalyst rear exhaust pipe 21 refrigerant jacket
22: condenser 23: gas piping
24: liquid piping 25: liquid outlet
26: gas outlet 27: cooling control valve
28: cooling fan 31: turbine / turbine room
32: refrigerant tank 61: refrigerant receiving space

Claims

A refrigerant jacket (21) for forming a refrigerant accommodating space (61) by combining with an outside of the exhaust pipe to surround a part of the exhaust pipe so as to absorb heat from the exhaust pipe well; A condenser 22 installed above the refrigerant jacket 21 and having a refrigerant circulation passage; A cooling fan 28 installed to provide wind to the condenser 22; A gas pipe 23 for connecting the upper portion of the refrigerant jacket 21 to the upper withdrawal pipe and the condenser 22 with the upper withdrawal pipe; A liquid pipe 24 connecting the refrigerant jacket 21 withdrawal pipe lower and the condenser 22 withdrawal pipe to pass through each other; A gas outlet 26 having a valve installed to discharge internal air at one side of the upper gas pipe 23; A liquid outlet port 25 having a valve installed at one side of a lower portion of the liquid pipe 24 to allow the liquid refrigerant in the cooling system to flow out; A cooling control valve 27 having a temperature control device installed on each of the gas pipe 23 and the liquid pipe 24 so as to adjust the cooling performance; The refrigerant jacket 21 is filled in the space except the condenser 22 in the cooling system refrigerant circulation circuit formed of the refrigerant jacket 21, the gas pipe 23, the condenser 22, and the liquid pipe 24 again. Engine exhaust gas cooling system using a refrigerant vaporization heat, characterized in that (21) is composed of a refrigerant (not shown) that can be boiled by the waste heat received from the exhaust pipe.

The engine exhaust gas cooling system according to claim 1, wherein the refrigerant (not shown) is one of water, an antifreeze additive, a freon refrigerant, a natural refrigerant, and a liquefied gas.

2. The engine exhaust gas cooling system according to claim 1, wherein the exhaust pipe is one of the catalytic converter rear exhaust pipe (15) or the catalytic converter front exhaust pipe (13).

The turbine / turbine chamber (31) according to claim 1, further comprising: a turbine / turbine chamber (31) installed in a conduit between the cooling control valve (27) installed in the gas pipe (23) and the condenser (22); An engine exhaust gas cooling system using refrigerant vaporization heat, characterized in that a refrigerant tank (32) is added to the conduit between the cooling control valve (27) and the condenser (22) installed in the liquid pipe (24).