Abstract: A multiple tube bank heat exchanger includes a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship and a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship. The second tube bank is disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank. A continuous folded fin extends between the first and second flattened tube segments of both of said first tube bank and said second tube bank.

Abstract: A multiple tube bank heat exchanger includes a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship and a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship. The second tube bank is disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank. A continuous folded fin extends between the first and second flattened tube segments of both of said first tube bank and said second tube bank.

Abstract: A heat transfer tube and a heat exchanger incorporating at least one heat transfer tube are provided. The heat transfer tube and the heat exchanger are optimized for use within an air conditioner (which is configured to operate only in a cooling mode). The heat transfer tube includes a tube body with an interior surface and an exterior surface. The tube body defining an outer diameter (Do) and a wall thickness (WT), wherein a ratio (WT/Do) the wall thickness (WT) to the outer diameter (Do) is between 0.061 and 0.071. The heat transfer tube includes multiple pluralities of adjacent helical fins protruding circumferentially around the interior surface of the tube body at respective helix angles. The multiple pluralities are separated by one or more transition area(s).

Abstract: A heat transfer tube and a heat exchanger incorporating at least one heat transfer tubes are provided. The heat transfer tube and the heat exchanger are configured to operate in both a heating mode and a cooling mode (e.g., to optimize the reversible function a heat pump). The heat transfer tube includes a tube body with an interior surface and an exterior surface. The tube body defining an outer diameter (Do) and a wall thickness (WT), wherein a ratio (WT/Do) the wall thickness (WT) to the outer diameter (Do) is between 0.061 and 0.071. The heat transfer tube includes a plurality of adjacent helical fins protruding circumferentially around the interior surface of the tube body, and at least one groove disposed between the plurality of adjacent helical fins. The configuration of the heat transfer tube(s) is optimal for the reversible function of the heat pump.

Abstract: Disclosed is a fluid conduit connection of a vapor compression system having a cooling capacity of less than or equal to 60,000 Btu/hour comprising a first fluid conduit comprising a first aluminum alloy and having first fluid conduit outside hydraulic diameter of greater than or equal to 7 millimeters, a second fluid conduit comprising a second aluminum alloy, a second fluid conduit cross-sectional flow area, and having a second fluid conduit outside hydraulic diameter of less than or equal to 7 millimeters, an engagement between the first fluid conduit and the second fluid conduit, and a sealing material disposed within the engagement serving to mechanically bind and seal the fluid conduit connection, wherein a ratio of a cross sectional flow area of a throat of the fluid conduit connection divided by the second fluid conduit cross-sectional flow area is between 0.1 and 0.6.

Abstract: A multiple tube bank heat exchanger includes a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship and a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship. The second tube bank is disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank. A continuous folded fin extends between the first and second flattened tube segments of both of said first tube bank and said second tube bank.

Abstract: A multiple tube bank heat exchanger includes a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship and a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship. The second tube bank is disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank. A continuous folded fin extends between the first and second flattened tube segments of both of said first tube bank and said second tube bank.

Abstract: An automatic fluxing machine is provided and includes a dispensing section including a surface having through holes formed therein through which flux material is dispensable toward a braze joint and a plugging section disposed below the braze joint to prevent downward flow of dispensed flux material.

Abstract: A multiple tube bank heat exchanger includes a first tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship and a second tube bank including at least a first and a second flattened tube segments extending longitudinally in spaced parallel relationship. The second tube bank is disposed behind the first tube bank with a leading edge of the second tube bank spaced from a trailing edge of the first tube bank. A continuous folded fin extends between the first and second flattened tube segments of both of said first tube bank and said second tube bank.

Abstract: An automatic fluxing machine is provided and includes a dispensing section including a surface having through holes formed therein through which flux material is dispensable toward a braze joint and a plugging section disposed below the braze joint to prevent downward flow of dispensed flux material.

Abstract: A refrigerated case includes a body having a left and a right side, a top, and a back. A refrigerated compartment is located within the body. A number of shelves are within the refrigerated compartment. A base compartment is below the refrigerated compartment. A dividing wall separates the base compartment from the refrigerated compartment. A refrigeration module is located within the base compartment. A support member intermediate to the left and right sides supports the shelves. A transverse beam supports the support member.

Abstract: Interlocking insulated wall sections (20-24), each of which contains a shell (30) having an outer panel (33) and a pair of end walls (35-36). A cover (31) is having an inner panel (38) and two end walls (39-40) is fitted over the shell. A first end wall (39) of the cover is mounted in contact with an end wall (35) of the shell and a second end wall (40) of the cover passes into the shell between the two end walls of the shell. An L-shaped flange (43) is connected to the second end wall of the cover and has a first leg of the flange (44) that rests in contact with the inner panel and a second leg of the flange (45) rests in contact with the other end wall of the shell. A space (50) is thus provided between the two panels of the wall section and is filled with an insulation (55). Each wall section is dimensioned so that it can be received in the opening between the second end wall of the cover and the end flange so that two wall sections can be interlocked together in assembly.

Abstract: A thermal insulating glass door includes a multi-panel glass panel assembly having a non-structural, protective trim abutting the peripheral edge of the glass panel assembly and extending along the perimeter of the glass panel assembly, and a pair of hinge brackets mounted to one side of said glass panel assembly in spaced relationship, and a handle on the glass panel assembly on the free-swinging side of the door. The non-structural, protective trim, the handle and the hinge brackets are adhesively bonded to the glass panel assembly using double sided adhesive tape.

Abstract: Interlocking insulated wall sections (20-24), each of which contains a shell (30) having an outer panel (33) and a pair of end walls (35-36). A cover (31) is having an inner panel (38) and two end walls (39-40) is fitted over the shell. A first end wall (39) of the cover is mounted in contact with an end wall (35) of the shell and a second end wall (40) of the cover passes into the shell between the two end walls of the shell. An L-shaped flange (43) is connected to the second end wall of the cover and has a first leg of the flange (44) that rests in contact with the inner panel and a second leg of the flange (45) rests in contact with the other end wall of the shell. A space (50) is thus provided between the two panels of the wall section and is filled with an insulation (55). Each wall section is dimensioned so that it can be received in the opening between the second end wall of the cover and the end flange so that two wall sections can be interlocked together in assembly.

Abstract: An infrared camera is used to detect leakages in a heat exchanger by an imaging process that indicates temperature differences between a heat exchanger and a pressurized gas therein. The temperature differences are created by cooling or heating either the pressurized gas or the heat exchanger, and any leakages are visually observable by the resultant image which is representative of the temperature differences. The process can be accomplished with the use of ambient air rather than the commonly used trace gases which are less desirable because of economical and environmental reasons.

Abstract: The loss of trace gas to the atmosphere when leak testing heat exchangers is avoided by the use of internal and external containers, with both the trace gas sensor and the coil to be tested being placed within the internal container. The space between the two containers is preferably placed under a vacuum, and the inner and outer containers are fluidly connected to a refrigerant recovery vessel for the accumulation of leaked trace gas. The trace gas can then be returned to the charging system for reuse. The use of extractors can also be made to conduct the flow of leaked trace gas from the containers to the refrigerant recovery vessel. A containment that is also provides to receive and contain any contaminated refrigerant from the two containers.

Abstract: The loss of trace gas to the atmosphere when leak testing heat exchangers is avoided by the use of internal and external containers, with both the trace gas sensor and the coil to be tested being placed within the internal container. The space between the two containers is preferably placed under a vacuum, and the inner and outer containers are fluidly connected to a refrigerant recovery vessel for the accumulation of leaked trace gas. The trace gas can then be returned to the charging system for reuse. The use of extractors can also be made to conduct the flow of leaked trace gas from the containers to the refrigerant recovery vessel. A containment that is also provides to receive and contain any contaminated refrigerant from the two containers.

Abstract: An infrared camera is used to detect leakages in a heat exchanger by an imaging process that indicates temperature differences between a heat exchanger and a pressurized gas therein. The temperature differences are created by cooling or heating either the pressurized gas or the heat exchanger, and any leakages are visually observable by the resultant image which is representative of the temperature differences. The process can be accomplished with the use of ambient air rather than the commonly used trace gases which are less desirable because of economical and environmental reasons.