Hamilton Sundstrand Patente

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A refrigeration circuit (100) includes a primary loop (104), a secondary loop (106) connected to the primary loop, a first expansion valve (108) connected to the secondary loop, and a second expansion valve (110). The second expansion valve is connected to the secondary loop and is in parallel with the first expansion valve to control thermal communication between the refrigeration circuit and a first heat load independent of thermal communication between the refrigeration circuit and a second heat load. Environmental control systems and methods (200) of controlling refrigerant flow in refrigeration circuits are also described.

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The present disclosure provides absorption refrigeration systems, assemblies and methods utilizing waste heat for climate control and/or cooling (e.g., electric systems cooling; electronics cooling; motor cooling; generator cooling; oil cooling; etc.). More particularly, the present disclosure provides absorption refrigeration systems, assemblies and methods utilizing waste heat (e.g., from aviation/aerospace systems, such as hybrid-electric/electric aircraft/aerospace systems or the like) for climate control and/or cooling (e.g., electronics cooling; motor cooling; generator cooling; oil cooling; electric systems cooling for energy savings on aviation/aerospace systems, such as hybrid-electric/electric aircraft/aerospace systems). In example embodiments, the waste heat utilization provides up to 100% of the energy control system (ECS) input energy, and certain configurations allow for substantially no electric energy input (e.g., allows for gravity flow only).

A heat exchanger includes a plurality of longitudinally-extending first channels (12, 26) and a plurality of second channels (14, 28) fluidly isolated from the plurality of first channels. Each first channels includes a plurality of spiraling internal fins (16, 30) and a plurality of external fins (18, 20, 32). The internal fins extend from and are integrally formed with the internal walls (22, 34) of the first channel. The external fins connect extend from and are integrally formed with the external walls (24, 36) of the first channels, connecting channels together. The plurality of second channels is defined in part by external walls of the plurality of first channels and the plurality of external fins.

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A heat exchanger includes a heat exchanger core (14, 14'), a pressure housing (12, 12'), and a flex beam (16, 16'). The pressure housing (12, 12') at least partially defines a core chamber. The flex beam (16, 16') extends between and connects the heat exchanger core (14, 14') and the pressure housing (12, 12') such that the heat exchanger core (14, 14') is suspended away from the pressure housing (12, 12') within the core chamber by the flex beam (16, 16'). The flex beam (16, 16') includes a core end connected to the heat exchanger core (14, 14') and a housing end spaced along the flex beam (16, 16') from the core end and connected to the pressure housing (12, 12').

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A rotor includes a base member (64) including a first side (66), a second side (68) opposite the first side, and a central opening (70) passing through the first side and the second side. The second side includes an outer circumferential edge (74) having a first dimension and the central opening having an inner circumferential edge (72) having a second dimension. A plurality of blades (80) extend outwardly from the first side. The plurality of blades extend about the central opening. A fuse element (86, 102, 112, 154, 170) is formed in the second side and extends along one of a radial direction and a circumferential direction. The fuse element has a length that is less than the first dimension.

Systems and methods to remove dust (110) from an extravehicular mobility unit (EMU) (120) worn by an astronaut in a deep space environment involve one or more ionic shower units (130) installed external to an interior volume (610) of a facility (600). Each ionic shower unit releases positively charged ions (135) and negatively charged ions (137) in a specified direction to neutralize the dust and generate neutralized dust (115). The interior volume of the facility is defined by an interior hatch (630) that is separated from an exterior hatch (620) by an airlock (105). One or more collection units is installed external to the interior volume. Each collection unit traps the neutralized dust to prevent the dust from entering the interior volume.

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A heat exchanger (10) is configured to adjust a flow restriction of flow passages through the heat exchanger in response to changes in temperature of elements that define at least a portion of the flow passages. The elements include a first material having a first coefficient of thermal expansion, and a second material having a second coefficient of thermal expansion that is different from the first coefficient of thermal expansion.

Disclosed is an aircraft system comprising: a linkage (68) comprising a first end (120), an opposing second end (130) and a clevis (160) therebetween; a motion limiter (400) configured to engage the clevis; wherein: the first end is configured for connecting to one of a strut of a ram air turbine (RAT) and an enclosure door, and the second end is configured for connecting with another of the strut and the door; and the motion limiter limits rotation between the first end of the linkage and the second end of the linkage.

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