Abstract: A refrigerated transport system (20) comprises a body (22) enclosing a refrigerated compartment (69). A refrigeration system (30) comprises: a vapor compression loop (31) having a first heat exchanger (38) positioned to reject heat to an external environment in a cooling mode. A heat transfer loop (32) has a second heat exchanger (58) positioned to absorb heat from the refrigerated compartment in the cooling mode. An inter-loop heat exchanger (44) has a first leg (42) along the vapor compression loop and a second leg (43) along the heat transfer loop in heat exchange relation with the first leg.

Abstract: An HVAC/R assembly including an HVAC/R unit including a casing, a heat exchanger disposed within the casing, the heat exchanger configured to circulate a refrigerant therethrough, and a plurality of sensing devices in communication with the HVAC/R unit, wherein each of the plurality of sensing devices is configured to detect a presence of the refrigerant.

Abstract: A system (20; 300) comprises: a vapor compression loop (38; 338); a low-pressure or medium-pressure refrigerant in the loop; a centrifugal compressor (42) along the vapor compression loop and comprising: a housing (120); an inlet (44); an outlet (46); an impeller (140); an electric motor (122) coupled to the impeller to drive rotation of the impeller; and one or more refrigerant-lubricated bearings (130, 132).

Abstract: An HVAC/R system configured to receive power from a main power source is provided. The HVAC/R system includes an HVAC/R component configured to contain a refrigerant and allow a refrigerant to flow therethrough, a detecting mechanism configured to detect a concentration of the refrigerant outside of the HVAC/R component, and a blower configured to operate under power from an auxiliary power source upon detection of the refrigerant above a predetermined refrigerant level during a main power source outage.

Abstract: An ejector has: a motive flow inlet (40); a secondary flow inlet (42); an outlet (44); a motive flow nozzle (242) having an outlet (110); a primary flowpath from the motive flow inlet through the motive flow nozzle to the ejector outlet; a secondary flowpath from the secondary flow inlet to the ejector outlet, merging with the primary flowpath at the motive nozzle outlet; a control needle (200; 300; 400) shiftable along a range of motion between a first condition and a second condition and seated against the motive nozzle in the second condition. The needle comprises: a main shaft (210); a tip (204); a first portion (220; 320) converging toward the tip; and a shoulder portion (214; 314; 422) between the first portion and the main shaft and seated against the motive nozzle in the second condition and converging toward the tip at a greater angle (?1; ?1 2) than an angle (?2; ?2 2) of the first portion.

Abstract: A mitigation damper operably coupled to a return conduit including an opening, the mitigation damper positioned adjacent to the opening; wherein the mitigation damper is configured to selectively block airflow in the return conduit and selectively block the opening.

Abstract: An HVAC system is provided having an air supply system, a refrigerant circuit configured to condition air in the air supply system, and an electrochemical sensor configured to detect a refrigerant leak from the refrigerant circuit.

Abstract: A hybrid space and water heating heat pump system includes a heat pump including an outdoor assembly and an indoor assembly; a hot water module including a first heat exchanger, a controller, and a water pump connected to a water line, the first heat exchanger being configured for heating water; and a water heater in fluid communication with the hot water module, the water heater configured for receiving heated water from the first heat exchanger; wherein the controller is configured to select between one of conditioning an interior space or heating of the water in the first heat exchanger; and wherein the heat pump is configured for circulating a refrigerant through a first refrigerant circuit in response to the conditioning of the interior space and circulating the refrigerant through a second refrigerant circuit in response to the heating of the water in the first heat exchanger.

Abstract: A comfort system outdoor unit with a heat exchanger coil and a fan in its top opening has an orifice structure and an insert registerable with the orifice structure to streamline the inward flow of air that passes over a lower end of the orifice structure. The insert may be fastened directly to the orifice structure lower end, or it may be installed so as to extend substantially from an upper edge of the coil to the orifice structure lower end.

Abstract: A mounting device mounts a mounting foot to another member, such as a base pan. The mounting device includes a grommet, a splined washer and a fastener. The grommet has an axially extending post for receiving a mounting foot. The splined washer is configured to lock into the mounting foot and the post. The splined washer has an inner bore for receiving the post. The fastener is received on the post and maintains the splined washer and the mounting foot on the post.

Abstract: A coil support suitable for supporting a coil in a condensing unit includes a body and a protrusion extending from the body. The protrusion is configured to limit movement of the coil in at least one direction.

Abstract: A comfort system outdoor unit with an orifice structure and a fan in its top opening is provided with an insert to streamline the inward flow of air that passes over a lower end of the orifice structure. The insert may be fastened directly to the orifice lower end, or it may be installed so as to extend substantially from an upper edge of the coil to the orifice structure lower end.

Abstract: A support bracket suitable for use in a casing of an outdoor condensing unit includes a main body configured to reside between a corner post and a coil of the condensing unit, a first extension member extending from a first end of the main body, and a second extension member extending from a second end of the main body. The first extension member is configured to attach to a first inlet grille of the condensing unit. The second extension member is configured to attach to a second inlet grille of the condensing unit.

Abstract: The invention is directed to an accumulator device which has an outer housing having an inlet and an outlet, and a U tube contained within the housing. The device also includes a filter which is positioned inside the housing adjacent the inlet. Dryer means in the form of a desiccant are also contained inside the housing. The device is positioned upstream of a compressor and functions to filter unwanted debris which would otherwise enter the compressor and cause potential damage.

Abstract: A method of controlling a current defrost cycle for an outdoor coil of a heat pump system, the heat pump system having a plurality of supplemental heating elements for heating an air stream passing from an indoor coil to an air supply duct during defrost operation, wherein an initial quantity of supplemental heating elements energized is a function of a most recent previous defrost cycle.