Rotary-type exhaust heat recovery apparatus

Patent metadata

Field	Value
Publication number	US-9689294-B2
Application number	US-201414532836-A
Country	US
Kind code	B2
Filing date	Nov 4, 2014
Priority date	Nov 5, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A rotary exhaust heat recovery apparatus may include an exhaust gas pipe including a bypass path into which a high-temperature exhaust gas is introduced and bypassed and an extension part extending from a side of the bypass path in a semi-cylindrical shape to allow the exhaust gas to pass and a semi-cylindrical heat exchanger rotatably accommodated within the exhaust gas pipe, allowing heat exchange to be performed between the high-temperature exhaust gas supplied from the bypass path and a low-temperature coolant introduced through a coolant inlet, in which a side surface of the heat exchanger includes a diameter surface formed as a flat surface and an arc surface formed as a curved surface, and the diameter surface of the heat exchanger has a surface with a rotation axis of the heat exchanger as a reference thereof which is closed and another surface provided with exhaust gas inlets.

First claim

What is claimed is:

1. A rotary-type exhaust heat recovery apparatus, comprising:
an exhaust gas pipe including:
a bypass path into which a high-temperature exhaust gas is introduced; and
an extension part extending from a side of the bypass path in a semi-cylindrical shape to allow the exhaust gas to pass; and

a semi-cylindrical heat exchanger rotatably accommodated within the exhaust gas pipe, allowing heat exchange to be performed between the high-temperature exhaust gas supplied from the bypass path and a low-temperature coolant introduced through a coolant inlet of the heat exchanger,
wherein a side surface of the heat exchanger includes a diameter surface formed as a flat surface and an arc surface formed as a curved surface,
wherein the diameter surface of the heat exchanger has a surface with a rotation axis of the heat exchanger as a reference thereof which is closed and another surface provided with exhaust gas inlets through which the exhaust gas is introduced to flow through exhaust gas paths; and
wherein the heat exchanger is rotated to be accommodated in the extension part, the arc surface of the heat exchanger and an inner surface of the extension part completely come in contact with each other to close the exhaust gas outlets by the inner surface of the extenson part.

2. The apparatus of claim 1 ,
wherein the coolant inlet is connected to an upper end of the heat exchanger to introduce the coolant into coolant paths formed within the heat exchanger,
wherein a coolant discharge port, through which the coolant flowing in the coolant paths is discharged, is connected to a lower end of the heat exchanger, and
wherein the coolant inlet and the coolant discharge port are coaxially disposed with the rotation axis of the heat exchanger.

3. The apparatus of claim 2 , wherein hoses made of a flexible material so as to accommodate movements of the coolant inlet and the coolant discharge port along with rotation of the heat exchanger are connected to ends of the coolant inlet and the coolant discharge port.

4. The apparatus of claim 1 ,
wherein exhaust gas outlets through which the exhaust gas flowing through the exhaust gas paths is discharged are formed in one side of the arc surface of the heat exchanger.

5. The apparatus of claim 1 , wherein the heat exchanger is configured with a plurality of semicircular plate-shaped coolant paths through which the coolant introduced through the coolant inlet flows, and a plurality of semicircular plate-shaped exhaust gas paths through which the exhaust gas flows, wherein the plurality of coolant paths and the plurality of the exhaust gas paths are alternately laminated to be adjacent to each other in parallel.

6. The apparatus of claim 5 , wherein the plurality of semicircular plate-shaped coolant paths are fluidly-connected to each other.

7. The apparatus of claim 1 , wherein the heat exchanger is configured with a plurality of semicircular plate-shaped coolant paths that are spaced apart from each other in parallel, allowing the coolant introduced through the coolant inlet to flow, and a plurality of pipe-shaped exhaust gas paths through which the exhaust gas flows, disposed between the coolant paths that are spaced apart from each other.

8. The apparatus of claim 7 , wherein the plurality of semicircular plate-shaped coolant paths are fluidly-connected to each other.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Seon Jong-Ho
• An Ho-Chan

Classifications

• Y02T10/12

  Improving ICE efficiencies · CPC title

• F28D21/0003

  the heat being recuperated from exhaust gases (F28D21/0014 takes precedence) · CPC title

• F01N2240/02

  a heat exchanger · CPC title

• F01N3/043

  without contact between liquid and exhaust gases · CPC title

• F28D1/02

  with heat-exchange conduits immersed in the body of fluid · CPC title