Heat recovery device with standoff heat exchanger mount
a heat recovery device and heat exchanger technology, which is applied in indirect heat exchangers, machines/engines, lighting and heating apparatus, etc., can solve the problems of increasing the amount of heat transferred to the coolant, increasing the load on the cooling system, and damage to the heat exchanger
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first embodiment
[0035]A heat recovery device 10 is now described with reference to FIGS. 1-5. The heat recovery device 10 may be used as an EGHR device in a motor vehicle exhaust system, and is therefore sometimes referred to herein as EGHR device 10.
[0036]The device 10 comprises a gas diverter valve 12, a gas / liquid heat exchanger 14 and a gas flow conduit 16. The gas flow conduit 16 has an inlet 18 and an outlet 20. Where device 10 is an EGHR device, the device 10 will be installed in an exhaust gas conduit of a motor vehicle, downstream of the exhaust manifold and upstream of the tail pipe. Due to its compact size, the device 10 may be located in the engine compartment of the vehicle, close to the exhaust manifold. As used herein, the terms “upstream” and “downstream” are terms which are used to describe the locations of elements of the device 10, relative to the flow path of a gas flowing through the device 10.
[0037]An overall direction of gas flow through device 10 is defined between the inle...
second embodiment
[0063]FIGS. 8 and 9 illustrate a heat recovery device 100 according to the invention. The heat recovery device 100 of FIGS. 8 and 9 differs from heat recovery device 10 in the orientation of its components. All the elements of device 100 are also included in device 10 and have already been described above, and further description of these elements is unnecessary. The elements which are shared by heat recovery devices 10 and 100 are identified by like reference numerals in FIGS. 8 and 9.
[0064]In the heat recovery device 100 of FIGS. 8 and 9, the upstream and downstream conduit portions 54, 56 of the heat exchange branch circuit 48 are aligned with one another along a direction which is at about 90 degrees to the overall gas flow direction, and at about 90 degrees to the direction of gas flow through the bypass branch circuit 46. In addition, the direction of gas flow through the gas flow passages 26 is oriented at an angle of about 90 degrees to the overall gas flow direction. It wil...
third embodiment
[0066]FIGS. 10 and 11 illustrate a heat recovery device 110 according to the invention. The view of heat recovery device 110 in FIG. 10 is similar to that shown in FIG. 3; sectioned in a first horizontal plane, with the valve 12 in the bypass position, and showing the outline of heat exchanger 14 in dotted lines. FIG. 11 shows the gas flow conduit 16 of heat recovery device 110 in isolation. The heat recovery device 110 differs from heat recovery devices 10 and 100 in the orientation of its components. All the elements of device 110 are also included in devices 10 and 100, and have already been described above, and further description of these elements is unnecessary. The elements which are shared by heat recovery devices 10 and 110 are identified by like reference numerals in FIG. 10.
[0067]The heat recovery device 110 of FIGS. 10 and 11 achieves a similar benefit as the heat recovery device 100 described above, in that it substantially eliminates the portion of downstream conduit p...
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