Abstract: A multi-unit transport refrigeration system including: a first transportation refrigeration unit configured to refrigerate a first transport container; a second transportation refrigeration unit configured to refrigerate a second transport container; and an energy management system including: an energy storage device configured to store electricity to power the first second transportation refrigeration unit; and a power conversion system electrically connecting the energy storage device to the first transportation refrigeration unit and the second transportation refrigeration unit, the power conversion system including: a first DC/DC converter configured to increase a voltage of the electricity received from the energy storage device from a first voltage to a second voltage; and a first DC/AC inverter configured to convert the electricity received from the first DC/DC converter from DC to AC and then convey the electricity to at least one of the first transportation refrigeration unit or the second transporta

Abstract: A heat pump apparatus includes: a compressor including a motor; an inverter that applies a desired voltage to the motor; a current detector that detects current flowing to the motor; a drive-signal generation unit that generates a drive signal for the inverter; a magnetic-pole position estimation unit that changes a voltage phase of a voltage command value for a high-frequency voltage, and estimates a maximum-heat-amount acquisition magnetic-pole position when the generation unit applies the high-frequency voltage to the motor to heat the compressor; a steady heating control unit that determines an amplitude and voltage phase of the voltage command value from the maximum-heat-amount acquisition magnetic-pole position and a defined necessary amount of heat when the generation unit applies the high-frequency voltage to the motor to heat the compressor; and a control switching determination unit that causes one of the estimation unit and the heating control unit to operate.

Abstract: A control system for a cooling system configured to selectively operate one or both of a condenser fan an evaporator fan in a reverse direction RD, measure power draw at the motor against configuration data and fan motor profiles, and determine if a blockage has occurred before the static pressure has reached a critical point static pressure where the efficiency, performance, and cooling capability of the cooling system is hindered and maintenance is required to clear the blockage. By determining if blockage has occurred before the static pressure has reached the critical point static pressure, an alert or corrective action can be taken.

Abstract: A method for cleaning an air conditioner includes: in response to a cleaning instruction, controlling frosting on the surface of a target heat exchanger; after a frosting completion condition is met, controlling defrosting of the frost on the target heat exchanger; and after a defrosting completion condition is met, reducing the surface temperature of the target heat exchanger to a sterilization temperature, and carrying out quick cooling sterilization, wherein the temperature difference between the sterilization temperature and the defrosting temperature during defrosting meets a set temperature change sterilization condition. By a frosting-defrosting process, dirt such as dust on the heat exchanger may be effectively stripped and deep bacteria may be exposed, and then the quick cooling sterilization process may kill the bacteria by utilizing the sharp temperature change during switching from the defrosting process to the quick cooling process. Also disclosed is the air conditioner.

Abstract: Cooling systems and methods of operation are provided. The cooling system may include a two-phase pumped loop (TPPL). The two-phase pumped loop may include, a receiver, a pump downstream from the receiver, a heat load downstream from the pump, a TPPL tee downstream from the heat load, a TPPL check valve downstream from the TPPL tee, and a heat exchanger downstream from the TPPL check valve and upstream from the receiver. The cooling system may further include a vapor cycle system (VCS) loop. The vapor cycle system loop may include the receiver, a compressor downstream from a vapor outlet of the receiver, a compressor check valve downstream from the compressor and upstream of the heat exchanger, the heat exchanger, and the heat load downstream from a liquid outlet of the receiver.

Abstract: A system for operational acoustic optimization of a variable speed compressor (2) includes a motor (6), a frequency inverter (3), and a control block (5). The frequency inverter (3) is electrically connected to the synchronous motor (6), an electrical network (4), and the control block (5). The control block (5) is configured to control the speed of the motor (6) and to establish a first switching frequency (F1) and a second switching frequency (F2) of the frequency inverter (3). The frequency inverter (3) is configured to start the variable speed compressor (2) by supplying motor (6) with a signal (9) with the first switching frequency (F1) for the duration of a time period (T1) corresponding to at least one alignment operation period of the motor (6) and to supply the motor (6) with a signal (9) with the second switching frequency (F2) after the time period (T1).

Abstract: A refrigeration apparatus includes: a refrigerant circuit through which refrigerant circulates; a controller to execute a plurality of refrigerant shortage sensing functions of sensing a shortage of an amount of the refrigerant; and an input device through which an operation mode to be set is input into the controller. The operation mode includes: a first mode in which energy-saving performance is emphasized; and a second mode in which the refrigeration apparatus is permitted to operate in a range in which reliability is ensured. In accordance with the operation mode set through the input device, the controller determines which one of sensing results obtained by the refrigerant shortage sensing functions is enabled and which one of sensing results obtained by the refrigerant shortage sensing functions is disabled. When a sensing result determined to be enabled shows a refrigerant shortage, the controller gives a notification about the refrigerant shortage.

Abstract: A refrigerant distributor (4) includes: a box body (42); a refrigerant inlet (41) arranged on an upper surface (421) of the box body (42); liquid exit openings (46) evenly arranged on a lower surface (422) of the box body (42); and end plates arranged at both ends of the box body (42) in a length direction and enclosing the box body (42) from the two ends; wherein, in a height direction from the lower surface (422) of the box body (42) to the upper surface (421) and within a predetermined height range starting from the lower surface (422), a width of the box body (42) increases gradually; and a pre-distributor (3) is arranged inside the box body (42).

Abstract: An air conditioner may provide a a fan housing assembly that moves in the front-rear direction by the operation of an actuator, and the fan housing assembly moves so as to pass through a front outlet arranged on a door assembly to be in a projected state, and the front end of the fan housing assembly protrudes further to the front than the front surface of the door assembly; and through the projected state, may provide conditioned air by a direct air flow to a long-distance target region. The configuration may enable the minimization of interference between the discharged air and the door assembly, and the minimization of flow loss of the discharged air since, when the fan housing assembly is in the projected state, a steering grill is in a state of protruding to the outside of the door assembly by passing through the front outlet.

Abstract: A system includes a dynamic compressor and a controller having a processor and a memory. The compressor includes a first compressor stage having a first variable inlet guide vane (VIGV) and a second compressor stage having a second VIGV. The memory stores instructions that program the processor to operate the compressor at a current speed, a first position of the first VIGV, and a second position of the second VIGV to compress the working fluid, and to determine if a condition is satisfied. If the condition is not satisfied, the processor is programmed to continue to operate the compressor at the current speed, the first position of the first VIGV, and the second position of the second VIGV. If the condition is satisfied, the processor is programmed to change the second position of the second VIGV to a third position and maintain the first position of the first VIGV.

Abstract: The present invention relates to a system (1) for managing the thermal comfort of a person, in particular on board a motor vehicle, this system being designed to use at least one state characteristic of the person and/or of their thermal environment, this characteristic being able to adopt a plurality of values, this system being designed to: acquire, using a sensor, data relating to the person and/or to their thermal environment, this sensor being in particular a camera designed to acquire an image of the person and/or of their thermal environment, evaluate, on the basis of these acquired data, the probability of the state characteristic adopting a first value by associating a first confidence level with this first value.

Abstract: Air conditioner units and methods of operating the same are provided. A method of operating an air conditioner unit includes measuring an ambient temperature and estimating a setpoint temperature of the air conditioner unit. The method also includes inputting the measured ambient temperature and the estimated setpoint temperature into a closed-loop control algorithm. The method further includes setting a compressor speed of the variable speed compressor based on the output of the closed-loop control algorithm. An air conditioner unit may include a controller, and the controller may be configured for performing the method.

Abstract: The present disclosure relates to a heating, ventilation, and air conditioning (“HVAC”) system include a supply damper, a return damper, and a defrost damper which are operable to control a supply airflow, a return airflow, and a defrost airflow to flow between a supply duct, a return duct, and an indoor heat exchanger without substantially flowing into and substantially cooling an indoor space. A reheat coil may also warm the supply air flow and a defrost return line may be used to bypass a bi-flow expansion device and an indoor heat exchanger.

Abstract: A HVACR protection system can include a pressure sensor to sense pressure within a refrigerant line coupled to a compressor; a timer; and a protection system controller. A compressor controller in communication with the protection system controller can control operation of the compressor and disable the compressor until successful completion of a vacuum test of the refrigerant line. The vacuum test can initiate upon the pressure sensor sensing the pressure being less than or equal to a vacuum test pressure, at which point the timer begins timing for a vacuum test time period. The vacuum test is successfully completed upon expiration of the vacuum test time period with the pressure remaining less than or equal to the vacuum test pressure for the vacuum test time period. The protection system controller can enable the compressor controller to operate the compressor upon successful completion of the vacuum test.

Abstract: Various disclosed embodiments include oil systems, electric motors, and vehicles. In an illustrative embodiment an electrical motor system includes an oil reservoir, a motor, and an oil delivery system. The oil reservoir is configured to hold oil therein. The oil delivery system includes a heat exchanger. The oil delivery system is configured to operate in a low-temperature mode, bypassing the heat exchanger, while the oil temperature is below a first predetermined temperature; operate in a high-temperature mode, directing oil traversing the oil delivery system through the heat exchanger while the oil temperature is above a second predetermined temperature; and operate in an intermediate-temperature mode, partially bypassing the heat exchanger while the oil temperature is between the first predetermined temperature and the second predetermined temperature.

Abstract: Systems and methods are described herein for controlling heat flow between systems of an electric automotive vehicle. An automotive electric vehicle system includes a high voltage battery system including an enclosure, an electric powertrain system, a radiator, coolant lines that permit coolant flow between the high voltage battery system, the power train system and the radiator, one or more valves for routing coolant along the coolant lines, and a controller. The controller is configured to control the one or more valves to control the flow of coolant among a plurality of different, selectable coolant flow states involving the high voltage battery system, the powertrain system and the radiator.

Abstract: A fluid control device includes a slide valve movable in a chamber along an axis between a closed position, in which the slide valve is pressed axially against a fixed seat, and an open position, in which the slide valve is axially separated from the seat and a thermomechanical actuator, which is able to drive the slide valve depending on the temperature of the fluid in the chamber and which includes both a thermostatic element, including a fixed piston, and a body forming a heat-sensitive part of the thermomechanical actuator, arranged inside the chamber The piston being mounted with the ability to move along the axis on the body so that the piston deploys against the body when the thermally expandable material expands, and a return spring, interposed axially between the casing and the body so as to retract the piston away from the body when the thermally expandable material contracts.

Abstract: An antifreeze valve unit has a valve body provided with at least one opening for the delivery of a fluid used in an air conditioning plant; this unit has a first thermostatic valve, fitted at a drain outlet to drain the fluid in function of the fluid temperature, and a second thermostatic valve fitted at the drain outlet to enable or prevent the drain of the fluid in function of the external environment temperature. This antifreeze valve unit operates reliably in any temperature condition of the inner fluid and of the external environment temperature, and enables the plant to be drained only if a real possibility of fluid freezing occurs.

Abstract: A refrigeration system includes an evaporator configured to receive a flow of refrigerant and transfer heat into the refrigerant within the evaporator to provide cooling for a temperature-controlled space, an expansion valve operable to modulate the flow of refrigerant into the evaporator, a liquid level sensor configured to measure a level of liquid accumulated within a component of the refrigeration system, and a controller configured to operate the expansion valve to increase the flow of refrigerant into the evaporator or decrease the flow of refrigerant into the evaporator based on the level of liquid measured by the liquid level sensor.

Abstract: A method for adjusting temperature controls of a refrigerator appliance. The method includes scanning an indicium with a user interface, transmitting data corresponding to a registration request from the user interface to a server, and receiving, at the user interface, data corresponding to a temperature control adjustment instruction from the server.