Abstract: A refrigeration apparatus for use in a battery electric vehicle having a traction battery for driving the electric vehicle and a refrigerated compartment that, in use, is cooled by the refrigeration apparatus, the refrigeration apparatus including: a power supply system for powering a refrigeration unit of the refrigeration apparatus, the power supply system comprising a controller; wherein the power supply system is configured to be connected to the traction battery and the controller is configured to monitor a charge level of the traction battery; wherein the power supply system is configured to draw power for the refrigeration unit from the traction battery; wherein the controller is configured with a pre-cooling mode to be used during a period of charging of the traction battery from a mains power source.

Abstract: According to one embodiment, a rotary compressor includes a compression mechanism unit and an electric motor. The compression mechanism unit includes a first bearing, a second bearing, first to third refrigerant compression units, a second intermediate partitioning panel, and a rotation shaft. The compression mechanism unit is fixed to the sealed container by a pair of fixing units which are provided at two locations spaced apart from each other in the axial direction of the rotation shaft, and the center of gravity of a structure comprising the compression mechanism unit and the rotor of the electric motor is positioned between the pair of fixing units.

Abstract: A transport refrigeration unit (TRU) system is provided. The TRU system includes a TRU and an energy storage device (ESD). The TRU includes components (32) configured to control an environment in a compartment interior and a TRU controller (31) configured to control the components (32) in accordance with initial control settings and to monitor energy usage by the components (32) being controlled in accordance with the initial control settings. The ESD (40) includes an ESD controller (42) receptive of data reflective of the monitored energy usage by the components (32) from the TRU controller (31) and configured to determine whether the energy usage is above a threshold. In an event the energy usage is above the threshold, the ESD controller (42) is further configured to identify operational changes for one or more of the components (32) to reduce the energy usage and override the initial control settings of the one or more of the components (32) with new control settings.

Abstract: A deflector for a condenser. The condenser has an inlet in communication with a compressor, and a deflector for guiding a refrigerant gas flow from the compressor is arranged in the condenser and at a position close to the inlet. The deflector is provided with a deflecting structure projecting toward the inlet, and the deflecting structure is configured as impermeable to the refrigerant gas flow.

Abstract: A supervisory-level control system is provided and includes a summation unit receptive of first and second signals, an HVAC system to generate the second signal according to first set-point signals and to a second set-point signal and a supervisory controller. The supervisory controller includes a control unit, a set-point scheduler and a zone level set-point distribution unit. The control unit is receptive of an error signal representing a difference between the first and second signals from the summation unit. The set-point scheduler is receptive of a demand signal generated by the control unit according to the error signal. The set-point scheduler generates a set-point command signal and the second set-point signal according to the demand signal. The zone level set-point distribution unit is configured to generate the first set-point signals in accordance with the set-point command signal.

Abstract: A method for verifying a detection of a motion of a body using a passive infrared sensor (100) includes generating motion data based on a first signal received at a primary detection channel (103a, 103c), the first signal indicates a possible motion of a body; generating verification data based on a second signal, or absence of second signal, received at a secondary detection channel (103b); and verifying that the first signal is a motion of a body based on a comparison of the motion data with the verification data; the primary detection channel (103a, 103c) is configured to receive a first predetermined range of signals, including at least some infrared signals, and the secondary detection channel (103b) is configured to receive a second predetermined range of signals, excluding at least some infrared signals via an infrared blocker (104).

Abstract: A method for handling a broadcast data packet using a network (300) including a plurality of nodes (NH, N1, N2, N3, N4, N5, N6), the method including: receiving, at a sending node, the broadcast data packet; checking, at the sending node, whether the broadcast data packet has been received at the sending node on a previous occasion, wherein if the sending node has not previously received the broadcast data packet the sending node enters a broadcast delivery mode, the broadcast delivery mode including: switching to a scan mode to listen for advertisements from other nodes in the network; starting a timer; wherein upon receipt of an advertisement from a neighbouring node the sending node sends an instance of the broadcast data packet to the neighbouring node and resets the timer.

Abstract: To achieve both improving operability of stop valves and downsizing an outdoor unit, the outdoor unit for an air-conditioner includes a valve fixing frame provided on the base frame, and a plurality of stop valves fixed to the valve fixing frame. A beam of the valve fixing frame includes a first notch opened upward, in which a first stop valve is disposed therein, and a second notch opened downward, in which a second stop valve is disposed therein. The first stop valve and the second stop valve are different in installation height in a vertical direction with reference to the installation surface.

Abstract: An access control system including a building management system in communication with a wireless device, a smart lighting system and a locking device, wherein the building management system communicates and assigns a lighting attribute to at least one of the wireless device, the smart lighting system and the locking device; and method for providing visually aided access to a building location including: assigning a lighting attribute by a building management system to a user; communicating the lighting attribute from the building management system to a wireless device of the user; displaying the lighting attribute on the wireless device; communicating the lighting attribute to a smart lighting system in communication with the building management system, to display the lighting attribute; and terminating the lighting attribute when a locking device in communication with the building management system has been opened by the user.

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: Techniques for generating coordination maps for energy efficient chilled water and condenser water temperature resets in a chiller plant system. A controller is configured to control and set thresholds for one or more parameters of the chiller system, the chiller system includes one or more cooling tower, one or more pumps, and one or more water chillers, and one or more sensors operably coupled to the controller, the one or more sensors are configured to measure values for one or more parameters. A processor is coupled to the controller, the processor is configured to generate a coordination map based on the measured values and the thresholds for the one or more parameters, configure an operating setpoint for the chiller system based on the coordination map, and control the chiller system based at least in part on the configured operating setpoint.

Abstract: An air conditioner that has a controller and is such that an outdoor unit, which is provided with a compressor, an outdoor heat exchanger, an accumulator, and a supercooling heat exchanger, and indoor units provided with indoor heat exchangers, are connected to each other by connecting piping to constitute a refrigerant circuit. The bottom of the accumulator is connected to an intake side of the compressor via return bypass piping that is provided with an electromagnetic valve. The cooling source for the supercooling heat exchanger is a supercooling bypass circuit provided with a supercooling expansion valve; and when the amount of refrigerant during heating operation is determined to be excessive, the controller performs a control so as to fully close the electromagnetic valve of the return bypass piping and to gradually increase the opening degree of the supercooling expansion valve of the supercooling bypass circuit from a fully closed state.

Abstract: A gesture access system includes a mobile device having a processor, an electronic storage medium, an environment detector system, and a software-based application. The application is stored in the storage medium and executed by the processor for generating a determination that a user of the mobile device has performed an intentional motion indicative of an intent to gain access. The environment detector system is adapted to generate and output information relative to a location of the mobile device with respect to the user and to the processor to assist in the determination.

Abstract: Disclosed is a muffler for a water-cooled chiller or air-cooled of a vapor-compression or absorption refrigeration system, the muffler having: an upstream case (110) having a fluid inlet (120); a downstream case (115) connected to the upstream case at a downstream end of the upstream case, the downstream case having a fluid outlet (125); the upstream case having a plurality of axially adjacent outer muffler rings (145) and a plurality of axially adjacent inner muffler rings (155), the outer muffler rings being axially coextensive and a radially exterior to the inner muffler rings and defining a fluid inlet passage (140) therebetween, wherein the outer muffler rings and inner muffler rings are a metal mesh material.

Abstract: A method for analyzing and displaying surveillance video including: capturing, using a first video camera, a first plurality of video frames of a first area at a first time; analyzing the first plurality of video frames or linking to one or more alarms received; determining a first activity of interest within one or more first video frames of the first plurality of video frames; generating a first activity of interest video clip from the one or more first video frames; and displaying the first activity of interest video clip within a first carousel on a display device, wherein the first activity of interest video clip is configured to rotate around a first axis within the first carousel on the display device.

Abstract: A compressor has an inlet port and a discharge port. The discharge port communicates into a resonator chamber. The resonator chamber includes a first stage resonator array and a second stage resonator array downstream of the first stage resonator array with a connecting passage intermediate the first and second resonator array. Each of the resonator arrays includes a pair of spaced resonator arrays sub-portions, with each of the sub-portions including a plurality of cells extending into a housing member, and have a bottom wall and an open outer wall communicating with the flow passage, with a plurality of orifices extending into each of the cells. The orifices have a smaller diameter than a hydraulic diameter of the cells.

Abstract: An example centrifugal compressor includes a housing that defines an inlet chamber and includes first and second openings that define a recirculation passage in fluid communication with the inlet chamber. An impeller is disposed within the housing and is rotatable about a longitudinal axis to draw fluid into the inlet chamber. The first and second openings are at different axial locations along the longitudinal axis. A plurality of inlet guide vanes are rotatable and situated in the inlet chamber. The centrifugal compressor includes a ring and a controller for moving the ring along the longitudinal axis between a first position and a second position when rotating the inlet guide vanes. The ring obstructs at least one of the first and second openings more in the second position than in the first position.

Abstract: An air conditioning system is provided and includes a unit receptive of refrigerant having a moderate-to-low global warming potential (GWP) value for thermal interaction with a fluid, an enclosure, a fan disposed and configured for urging a flow of the fluid through the unit, a refrigerant detection sensor and a controller. The refrigerant detection sensor is disposed in the enclosure to be operable in a first mode in which a baseline response is established and a second mode in which refrigerant leak detection is executed based on the baseline response. The refrigerant detection sensor is further configured to generate a binary output of leak and non-leak signals in accordance with a result of the refrigerant leak detection. The controller is configured to control operations of the fan and the vent based on the binary output.

Abstract: The present utility model provides a fan cover shell and an air conditioning unit having the same. The fan cover shell includes an outer frame; multiple annular auxiliary reinforcement ribs, arranged from the center of the fan cover shell towards the outer frame; and multiple main reinforcement ribs, respectively extending from the center of the fan cover shell to the outer frame and intersecting with the auxiliary reinforcement ribs to form multiple ventilation grills; the main reinforcement rib forms a multi-section curve, and any adjacent curves of the multi-section curve bend towards a reverse direction. According to the fan cover shell of the present utility model, a better air guide effect is achieved by optimizing the main reinforcement ribs.

Abstract: A system includes an application on a mobile device operable to communicate with a local portal, the application is operable to receive a mobile key from the local portal and from that to retrieve a mobile credential for authorizing a user to access an access control. A method of local key distribution can include entering a pre-shared password to a local portal to encrypt a mobile credential; communicating the encrypted mobile credential to an application on the mobile device; and entering the pre-shared password to the application on the mobile device to decrypt the mobile credential.