Carrier

A system (100) having: a power distribution system (500) with: a controller (510); a regenerative braking system (330); an electronic braking system, EBS, (520) that transmits first data (530) to the controller (510) indicative of an EBS status; an energy storage system, ESS, (310) that transmits second data (540) to the controller (510) indicative of an ESS status; a TRU (150), selectively powered by the ESS (310) and by the regenerative braking system (330), that transmits third data (550) to the controller (510) indicative of a TRU status; and a power release system, PRS, (650) that bleeds or stores power from the regenerative braking system (330); wherein the controller (510): renders a first determination that one or more of the first data (530) is indicative of an alert condition while the regenerative braking system (330) is generating power, that the second data (540) implies preventing the generated power from reaching the ESS (310), or the third data (550) implies preventing the generated power from reaching the TRU (150); and control the PRS (650), responsive to the first determination, to bleed or store the generated power.

This application provides a heat exchanger (100) for absorbing heat and evaporating a refrigerant in a refrigeration system (200), the heat exchanger (100) including: a heat exchanger shell (101) enclosed to form a heat exchanger cavity (1011); a heat exchange medium inlet (102) opened at one side of the heat exchanger shell (101); a heat exchange medium outlet (103) communicating with the heat exchange medium inlet (102) through a heat exchange tube bundle (104); a first refrigerant inlet (105) opened at a bottom of the heat exchanger shell (101) and communicating with the heat exchanger cavity (1011); a refrigerant outlet (106) opened at a top of the heat exchanger shell (101) and communicating with the heat exchanger cavity (1011); a second refrigerant inlet (107) disposed at a position farther from the heat exchange medium inlet (102) than the first refrigerant inlet (105); and a gas-liquid separator (108) connected to the first refrigerant inlet (105) and the second refrigerant inlet (107). By separating a liquid refrigerant and a gas refrigerant in a two-phase refrigerant using the gas-liquid separator (108), the liquid refrigerant and the gas refrigerant are redistributed, a heat exchange efficiency of the heat exchanger and the refrigeration system is improved, and a refrigerant charge amount is reduced.

A rotor (100) of a mixed flow fan is disclosed. The rotor (100) includes one or more blades (130) extending from a hub wall (110) to a shroud wall (150). The leading edge (132) of each blade (130) has one or more notches (135), each notch (135) being formed by a backward sweeping edge (136) and a forward sweeping edge (140) defined on the leading edge (132). The notches (135) are defined between a transition point (146) and a shroud wall junction (152) on the shroud wall (150), the transition point (146) being on or proximate to a point (144) on the leading edge (132) that is substantially normal to an axially projected trailing edge root junction (142) of a neighboring blade.

A cooling module (100) associable with a heat-generating electronic device (80) of a server (30) includes a casing (102) having a hollow interior (104) and at least one heat removal device (120) arranged within the hollow interior (104). A fluid flow path (124) of a primary cooling fluid (C1) extends through the casing (102) and the at least one heat removal device (120) defines a portion of the fluid flow path (124). The primary cooling fluid (C1) is configured to absorb heat from the heat-generating electronic device (80) within the cooling module (100).

A cooling device (100) associable with a heat-generating electronic device (50) of a server (30) includes a housing (120) having a fluid inlet (122) and a fluid outlet (124) and a divider (126) separating the interior of the housing into a first fluid compartment (128) and a second fluid compartment (130). Both the first fluid compartment (128) and the second fluid compartment (130) are fluidly connected to the fluid inlet (122). A heat transfer potential of the second fluid compartment (130) is less than the heat transfer potential of the first fluid compartment (128). At least one opening (140a, 140b) is formed in the divider (126) at a location downstream from the fluid inlet (122) and upstream from the fluid outlet (124). The first fluid compartment (128) is fluidly coupled to the second fluid compartment (130) at the at least one opening (140a, 140b).

An (air-cooled) refrigerant system (102) is disclosed. The refrigerant system (102) includes a first enclosure (106) comprising a refrigerant circuit (104) configured to circulate a process fluid. At least a portion of the refrigerant circuit (104) is configured to flow the process fluid through a heat exchanger (108), the heat exchanger (108) being configured to dissipate heat from the process fluid passing through the heat exchanger (108). The refrigerant system (102) includes a second enclosure (114), where the second enclosure (114) comprises one or more electrical components configured to power and/or control the refrigerant circuit (104). The second enclosure (114) is fluidically sealed off from the first enclosure (106). Separating and fluidically sealing the first enclosure (106) and the second enclosure (114) prevents the process fluid from being exposed to the electrical components, thereby reducing risk of ignition of the process fluid.

A liquid desiccant (LD)-based dehumidification system (601) is provided for heating, ventilation, air conditioning and refrigeration (HVAC&R) systems. The LD-based dehumidification system (601) includes a tank (610) containing LD (611), a contact media device (620) including media (621) for disposition in a flow of air to be dehumidified and a sump (622) disposed below the media (621) to receive LD (611) drained from the media (621), a pump and valve system (630) to pump the LD (611) from the tank (610) to the contact media device (620) to wet the media (621) and from the sump (622) to the tank (610), a heat exchanger (640) through which LD (611), which is pumped from the sump (622) to the tank (610), flows, a sensing system (650) to sense one or more conditions of the LD (611) and a controller (780) to control the pump and valve system (630) in accordance with a system status and the one or more conditions of the LD (611).

A home energy management system (HEMS) includes a power supply configured to provide alternating current (AC) power, at least one load electrically connected to the power supply, and a modular multi-level (MMC) converter configured to receive power from the power supply and to supply a regulated converter output to the at least one load. The MMC includes one or more converter branches and a filter. The converter branch is in signal communication with the power supply and includes a plurality of bridge cells. Each bridge cell includes a plurality of power switches and a battery. The filter is electrically connected between the at least one load and the at least one converter branch. The filter is configured to reduce harmonic distortion and highfrequency noise in the converter output.

A heat exchanger of a heating, ventilation and air conditioning (HVAC) system includes a plurality of heat exchange pathways extending across a heat exchanger body, and a heat exchanger inlet oriented such that a flow of refrigerant flows vertically upwardly through the heat exchanger inlet toward an inlet header configured to distribute a flow of refrigerant to the plurality of heat exchange pathways. A heat exchanger outlet is connected to the plurality of heat exchange pathways. The heat exchanger outlet is oriented such that the flow of refrigerant exiting the heat exchanger via the heat exchanger outlet flows vertically upwardly through the heat exchanger outlet.

An air conditioning system (1000) includes an inverter (1006) and a power factor correction circuit (1050) in signal communication with the inverter (1006). The inverter (1006) converts a DC voltage delivered from a DC voltage supply (1002) into an AC voltage. The power factor correction circuit (1050) delivers an AC line voltage across an AC voltage line (1052) based on the AC voltage and outputs an AC line voltage signal (1059) that is indicative of the AC line voltage. An inverter controller (1008) receives a feedback signal (1007) of the AC voltage from the inverter (1006) and receives the AC line voltage signal (1059) from the PFC circuit (1050). The inverter controller (1008) selectively operates in a first mode to control the inverter (1006) based on the AC line voltage signal (1059) and a second mode to control the inverter (1006) based on the feedback signal (1007) of the inverter output.