| 摘要 |
Apparatuses and methods described herein relate to brazed heat exchangers, which may be used for example in a heating, ventilation, and air conditioning system (HVAC) system and/or unit thereof. The heat exchanger includes a fluid flow structure to allow a fluid stream, for example a chilled fluid stream to exchange heat serially with more than one refrigerant circuit, where each refrigerant circuit is a distinct and independent refrigerant circuit. Generally, an apparatus to exchange heat serially with more than one heat exchange fluid circuit includes an internal flow path that allows a working fluid to flow through a first brazed heat exchanger, through one or more internal routing channels, and through a second brazed heat exchanger. |
| 主权项 |
1. A brazed heat exchanger apparatus, comprising:
a first brazed heat exchanger including
a working fluid inlet in fluid communication with working fluid flow channels,a first heat exchanger fluid inlet in fluid communication with first heat exchanger fluid flow channels, the first heat exchanger fluid flow channels in fluid communication with a first heat exchanger outlet,the first heat exchanger fluid inlet, fluid flow channels, and outlet are configured to allow fluid flow of a first heat exchange fluid into and out of the first brazed heat exchanger,the working fluid channels are configured relative to the first heat exchanger fluid flow channels so that the working fluid flowing through the working fluid flow channels exchanges heat with the first heat exchange fluid flowing through the first heat exchanger fluid channels;one or more internal routing channels in fluid communication with the working fluid flow channels of the first brazed heat exchanger; a second brazed heat exchanger connected with the first brazed heat exchanger,
the second brazed heat exchanger includesworking fluid flow channels in fluid communication with the one or more internal routing channels,a second heat exchanger fluid inlet in fluid communication with second heat exchanger fluid flow channels, the second heat exchanger fluid flow channels in fluid communication with a second heat exchanger outlet,the second heat exchanger fluid inlet, fluid flow channels, and outlet are configured to allow fluid flow of a second heat exchange fluid into and out of the second brazed heat exchanger,the working fluid channels of the second brazed heat exchanger are configured relative to the second heat exchanger fluid flow channels so that the working fluid flowing through the working fluid flow channels exchanges heat with the second heat exchange fluid flowing through the second heat exchanger fluid channels,wherein an internal flow path of the apparatus includes the working fluid flow channels of the first brazed heat exchanger, the one or more internal routing channels, and the working fluid flow channels of the second brazed heat exchanger,the internal flow path configured so that the working fluid exchanges heat serially first through the first brazed heat exchanger and then through the second brazed heat exchanger. |
