| Patent application number | Description | Published |
|---|
| 20090025418 | HEAT EXCHANGER SUPPORT - A heating, ventilation, air conditioning and refrigeration (HVAC&R) system having a compressor, a heat exchanger, an expansion device, and a multichannel heat exchanger connected in a closed refrigerant loop. The HVAC&R system may also have a base, a retainer and/or a grommet for providing support to the multichannel heat exchanger and/or substantially isolating the multichannel heat exchanger from the base. | 01-29-2009 |
| 20090266092 | APPARATUS TO SENSE AND CONTROL COMPRESSOR OPERATION IN AN HVAC SYSTEM - An HVAC system and method for configuring a controller to control a compressor including a detection system provided to determine a type of compressor. The detection system includes a processor; and a load sensing circuit connected between the processor and a controller. The controller has a plurality of output connections connectable to a compressor. The load sensing circuit senses whether a load is present on each output connection of the plurality of output connections and provides a load signal to the processor indicating whether a load is present on each output connection. The load signals are processed with the processor to determine the type of compressor is present. The controller is configured to control the compressor in response to the determined type of compressor. | 10-29-2009 |
| 20100251742 | HVAC&R SYSTEM VALVING - An HVAC&R system is disclosed that utilizes energy-efficient valving. The valving controls the flow of refrigerant and may be adapted for evaporator or condenser applications, on both AC systems and heat pumps (as well as chillers and other refrigeration systems). The valving may provide simultaneous and individualized control of flow through individual coils or groups of coils for improved control of evaporation, condensation, defrosting and so forth. In some configurations a common sensor may be shared between individual coils or groups of coils and may provide sensed parameters to control circuitry for controlling the valving. Other configurations may include bypass valving to direct fluid around the flow control valving. In yet other configurations, a valve may be used to bypass tapped vapor around a heat exchanger functioning as an evaporator. | 10-07-2010 |
| 20110030932 | MULTICHANNEL HEAT EXCHANGER FINS - Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided that include nubbed, collared, and/or flapped fins. In certain embodiments, the fins include openings or slots with protrusions for spacing multichannel tubes from the fins. During assembly, the protrusions may be deformed by the tubes. Braze alloy may be positioned in the gaps created by the protrusions to affix the multichannel tubes to the fins. In other embodiments, the fins include flaps or collars designed to interface with the multichannel tubes. In these embodiments, the tubes may be expanded into the fins. | 02-10-2011 |
| 20110132587 | Multichannel Evaporator with Flow Mixing Manifold - Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which include manifold configurations designed to promote mixing of vapor phase and liquid phase refrigerant. The manifolds contain flow mixers such as a helical tape, sectioned volumes, and partitions containing apertures. The flow mixers direct the flow of refrigerant within the manifold to promote a more homogenous distribution of fluid within the multichannel tubes. | 06-09-2011 |
| 20110315363 | MULTICHANNEL HEAT EXCHANGERS EMPLOYING FLOW DISTRIBUTION MANIFOLDS - The present disclosure is directed to heat exchangers with flow distribution manifolds divided into an inlet section and a distribution section by a distributor. The inlet section may have a relatively small cross-sectional area that promotes mixed phase flow of liquid and vapor refrigerant. The manifolds may be used with multichannel tubes with flow path inlet sections that allow refrigerant to enter the flow paths through an outer wall of the tubes. In certain embodiments, a portion of the outer wall is removed to expose the flow paths to a distribution chamber within the inlet manifold. The multichannel tubes extend into the distribution section to partition the distribution section into a series of distribution chambers defined by a pair of adjacent tubes, the distributor, and the inlet manifold. Within each distribution chamber, the refrigerant may be directed into the multichannel tubes through the inlet sections of the multichannel tubes. | 12-29-2011 |
| 20110315364 | MULTICHANNEL HEAT EXCHANGER TUBES WITH FLOW PATH INLET SECTIONS - The present disclosure is directed to multichannel tubes with flow path inlet sections that allow refrigerant to enter the flow paths through an outer wall of the multichannel tubes. In certain embodiments, a portion of the outer wall is removed to expose the flow paths to a distribution chamber within an inlet manifold divided into an inlet section and a distribution section by a distributor. According to certain embodiments, the inlet section may be designed to have a relatively small cross-sectional area that promotes mixed phase flow of liquid and vapor refrigerant. The multichannel tubes extend into the distribution section to partition the distribution section into a series of distribution chambers defined by a pair of adjacent tubes, the distributor, and the inlet manifold. Within each distribution chamber, the refrigerant may be directed into the multichannel tubes through the flow path inlet sections of the multichannel tubes. | 12-29-2011 |
| 20120031601 | MULTICHANNEL TUBES WITH DEFORMABLE WEBS - The present disclosure is directed to multichannel tubes that can be expanded to assemble the multichannel tubes within plate fin heat exchangers. The multichannel tubes each include several generally parallel flow paths, which are separated from one another by deformable webs slanted in a common direction across a width of the multichannel tubes. The webs may deform upon expansion of the tubes with a high pressure fluid. During expansion, the webs may stretch, shift positions, and/or change shape to allow the outer dimensions of the tube to increase. The multichannel tubes may be designed to expand to fill openings of plate fins, creating an interference fit between the multichannel tubes and the plate fins. | 02-09-2012 |
