Abstract: A unit load device (ULD) for aircraft cargo loading, the ULD including a container having a cargo portion and a ledge extending from the cargo portion. The ledge is configured to interface with a floor latch. A first latch sensor is disposed on the ledge. The first latch sensor is configured to detect a closed latch contact. A controller is electrically connected to the first sensor, and is configured to automatically perform an action in response to the first latch sensor detecting the closed latch contact.

Abstract: An outdoor HVAC unit includes a housing. A compressor is located within the housing. A heat exchanger is located within the housing and is in fluid communication with the compressor. At least one expansion device is located within the housing and is in fluid communication with the heat exchanger.

Abstract: A fitting assembly for connection to a flexible duct includes a fitting and a ferrule extending from the fitting. The ferrule includes a first end configured for insertion into an open end of the flexible duct, a second end adjacent to the fitting, and a sidewall extending between the first end and the second end. The sidewall defines a minor diameter adjacent the first end and a major diameter spaced apart from the minor diameter. The ferrule further includes a ferrule thread extending radially outward from the sidewall. The minor diameter is less than or equal to an inner diameter of the flexible duct with the flexible duct fully elongated, and the major diameter is greater than the inner diameter of the flexible duct with the flexible duct fully elongated.

Abstract: An axial fan includes: an impeller including a rotating part, and a blade part connected to the rotating part; a bellmouth including a flat part orthogonal to an extension direction of a rotation axis of the rotating part; a rising part rising from the flat part; and an opening along which the rising part extends, the impeller being located in the opening, the rising part surrounding the impeller, the bellmouth including a plurality of grooves located at a surface of the bellmouth, the surface of the bellmouth being connected to an inner surface of the rising part, the inner surface of the rising part facing the blade part of the impeller, the plurality of grooves being located in at least a corner portion connecting the flat part and the rising part, the plurality of grooves extending in a direction crossing the flat part.

Abstract: An integrated fire suppression system includes a plurality of fire detection systems. Each of the fire detection systems is individually addressable. A control system is communicatively coupled to each of the fire detection systems. A plurality of building systems is communicatively connected to the control system. The plurality of building systems includes at least one of a fire suppression system, an alarm system, a heating ventilation and cooling (HVAC) system, a building power supply system, and a building security system. The control system is configured to provide a localized response to a fire detection by at least one fire detection system in the plurality of fire detection systems, the localized response being a response in at least one of the plurality of building systems.

Abstract: Systems and methods for control of a locking system are disclosed. In some embodiments, a system comprises one or more sensors configured to generate output signals indicating one or more movement information of a subject. The system comprises at least one processor operatively connected with the one or more sensors, and memory storing instructions executable by the at least one processor, the instructions when executed cause the system to determine, using the output signals from the one or more sensors, one or more movement parameters of the subject; and send, based on the determined movement parameters of the subject, an instruction to the locking system to adjust an open delay time for the locking system, the open delay time being time the locking system remains open.

Abstract: Systems and methods for keybox status determination are disclosed. In some embodiments, a system for determining a status of a keycontainer of a lockbox comprises one or more sensors configured to generate output signals related to the keycontainer. The system further comprises at least one processor operatively connected with the one or more sensors, and memory storing instructions executable by the at least one processor. The instructions when executed cause the system to: determine, using the output signals from the one or more sensors, a status of the keycontainer, the status indicating whether the keycontainer is released from the keybox; and send a status notification based on the determined status of the keycontainer.

Abstract: A system has: a compressor having a suction port and a discharge port; an ejector having a motive flow inlet, a suction flow inlet, and an outlet; a separator having an inlet, a vapor outlet, and a liquid outlet; a first heat exchanger; an expansion device; and a second heat exchanger. Conduits and valves are positioned to provide alternative operation in: a cooling mode and a heating mode. In the cooling mode, a needle of the ejector is closed. In the heating mode refrigerant passes sequentially from a first section of the second heat exchanger to a second section. In the cooling mode refrigerant passes in parallel through the first section and the second section.

Abstract: A method for operating a heat pump (20; 300) includes operating in a cooling mode wherein heat is absorbed by refrigerant in the indoor heat exchanger (26) and rejected by refrigerant in the outdoor heat exchanger (24). The heat pump switches to operation in a heating mode wherein heat is rejected by refrigerant in the indoor heat exchanger, heat is absorbed by refrigerant in the outdoor heat exchanger, and there is an ejector (60) motive flow and ejector secondary flow. In the heating mode a refrigerant pressure (PH) or temperature (TL) is measured and, responsive to the measured refrigerant pressure or temperature, at least one of a fan speed is changed and a needle (132) of the ejector is actuated.

Abstract: An exemplary heating ventilation and cooling (HVAC) system includes a multi-phase power input, an AC-DC rectifier connected to a DC-AC inverter via a DC power bus, a multi-phase power output connecting the DC-AC inverter to a fan blower motor, and at least one redundancy power system. The redundancy power system is configured to bypass at least one of the AC-DC rectifier and the DC-AC inverter.

Abstract: A centrifugal fan includes a back plate, a shroud, and multiple blades. The multiple blades include first to third blades. The first to third blades include first to third leading edge parts and first to third trailing edge parts. First to third lengths are the length from the first to third leading edge parts to the first to third trailing edge parts. The second length is greater than the first length. The third length is greater than the second length. The numbers of the first to third blades are equal. The total number of the multiple blades is a multiple of 3, and is not less than 6. The first to third blades are arranged in a rotation direction in the order of the first blade, the second blade, and the third blade.

Abstract: A rooftop unit (RTU) having a power exhaust component is disclosed. The RTU comprises a sliding mechanism configured to support the power exhaust component and enable movement of the power exhaust component between a stowed position, and an unpacked position. Further, an RTU having furnace assembly is disclosed. The RTU comprises a sliding mechanism configured to support the furnace assembly and enable movement of the furnace assembly between a stowed position, and an unpacked position. Furthermore, an air-directing baffle for an electric heater associated with an RTU is disclosed. The baffle is adapted to be removably configured between the electric heater and fan(s) associated with the RTU. The baffle directs the flow of air towards a limit switch and/or heating elements associated with the electric heater while restricting the recirculation of the air towards the fans or within the RTU.

Abstract: A system and a method for providing managed services are provided. The system provides a first access control platform and a second access control platform. The first access control platform is configured to receive at least one of a hardware event, an access request event, and a management request event from at least one gateway (e.g., located at a premises). The first access control platform may include at least one of a permissions database (e.g., storing authorized access credentials), a hardware event database (e.g., storing hardware events), and a management database (e.g., storing management request events). The first access control platform may compare received access credentials to the authorized access credentials in the permissions database. The second access control platform may be configured to update at least one of the permissions database (e.g., adding/removing authorized access credentials) and the hardware event database (e.g., adding/removing security devices).

Abstract: A method of authenticating a request from an IoT device includes the step of receiving a request from an IoT device for restricted access information. A location of an authorized user of the restricted access information is identified based on at least one location criteria of the authorized user. Access of the restricted access information to the IoT device is granted when the authorized user satisfies the at least one location criteria and denying access to the IoT device of the restricted access information when the authorized user fails the at least one location criteria.

Abstract: A hydronic economizer module is configured for use in a chiller system that has a vapor compression cycle. The hydronic economizer module includes a heat exchanger assembly located within a housing having at least one heat exchanger coil, a fan assembly having at least one fan generally aligned with at least one heat exchanger coil, and at least one valve is movable between a plurality of positions to control a flow of fluid into the heat exchanger assembly. When the at least one valve is in a first position, the economizer module is arranged in parallel with a flat plate heat exchanger. When the at least one valve is in a second position, the economizer module is arranged in series with the flat plate heat exchanger. The flat plate heat exchanger includes at least one fluid port for communicating with a component of the vapor compression cycle.

Abstract: An axial fan includes: an impeller including a rotating part, and a blade part connected to the rotating part; a bellmouth including a flat part orthogonal to an extension direction of a rotation axis of the rotating part; a rising part rising from the flat part; and an opening along which the rising part extends, the impeller being located in the opening, the rising part surrounding the impeller, the bellmouth including a plurality of grooves located at a surface of the bellmouth, the surface of the bellmouth being connected to an inner surface of the rising part, the inner surface of the rising part facing the blade part of the impeller, the plurality of grooves being located in at least a corner portion connecting the flat part and the rising part, the plurality of grooves extending in a direction crossing the flat part.

Abstract: A refrigeration system includes a compressor connected to a first heat exchanger and a second heat exchanger. An expansion device is connected between the first heat exchanger and the second heat exchanger. A ratio of a volume of the first heat exchanger to a volume of the second heat exchanger is between 0.6 and 1.8.

Abstract: A method of providing automatic real-time notifications to at least one user by an electronic locking system includes detecting whether the user is leaving a storage space secured by the electronic lock. The method further includes determining whether a latch of the electronic lock is open upon detecting the user is leaving the storage space. The method includes monitoring a change in location of a device of the user with respect to the electronic lock and displaying a first alert notification on the device if the location of the device is at a threshold level of a communication range and the latch status is open. Subsequently, the method includes determining whether the location of the device is outside of a geofence range in presence or absence of any user response to the first alert notification and displaying a second alert notification if the latch status is still open.