Abstract: A high efficiency ventilation system may include a partition configured to separate a supply air stream and a return air stream, an energy recovery ventilator, a heat recovery ventilator, a refrigerant flow controlling condensing unit, and a direct expansion coil. The refrigerant flow controlling condensing unit may be configured to send a refrigerant to the direct expansion coil and configured to receive a refrigerant from the direct expansion coil. The direct expansion coil may be disposed between the energy recovery ventilator and the heat recovery ventilator. The high efficiency ventilation system may be configured to supply ventilation air to a controlled environment at a particular temperature and a particular humidity.

Abstract: In an air-cooled heat exchanger system, the stress in the pipe connecting the upstream main pipe of the upstream manifold and each heat exchanger is minimized by using a simple structure. The air-cooled heat exchanger system (1) comprises an upstream manifold (6) including a plurality of upstream branch pipes (18) extending therefrom, a heat exchanger (4) connected to the downstream end of each branch pipe, and including an inlet header (31) placed on a base frame in a moveable manner, an outlet header and a plurality of heat transfer tubes (34) connecting the two headers, and a connecting member (41, 75) connecting each adjacent pair of the inlet headers.

Abstract: The present invention relates to a pump (15) for pumping a coolant (9) within a Dewar vessel (1) and to a corresponding Dewar vessel (1) for storing samples in a coolant (9). The Dewar vessel (1) comprises a thermally insulated reservoir (3) for the coolant (9) and a sample vessel (11) provided separately and arranged in the thermally insulated reservoir (3). The reservoir (3) is connected to the sample vessel (11) in such a way that the level of coolant (9) is constant in the sample vessel (11). Pump (15) may help in keeping the level of coolant (9) in the sample vessel (11) constant. For this purpose the pump (15) comprises a chamber (17) with an inlet (19) and an outlet (21), a closing element (23) and a pressure increasing device (25). Therein, the inlet (19) is connectable to the reservoir (3) and the outlet (21) is connectable to a sample vessel (11) of the Dewar vessel (1).

Abstract: A heating, ventilation, and air condition (HVAC) unit may include a casing, an evaporator, a heater core, and a first damper. The casing may define a front airflow passageway, a rear airflow passageway having an inlet, and first and second outlets in fluid communication with the rear airflow passageway. The evaporator and the heater core may be disposed within the casing. The first damper may be disposed within the casing between the evaporator and the heater core and movable between a first position in which airflow is directed to the heater core and a second position in which airflow is directed away from the heater core. Airflow across the evaporator from the front airflow passageway to the rear airflow passageway is directed to the first and second outlets when the first damper is moved from the first position toward the second position.

Abstract: A pulse tube refrigerator includes a compressor, a regenerator to which a refrigerant gas is discharged from the compressor and from which the refrigerant gas returns to the compressor, a pulse cube including a low-temperature end connected to the low-temperature end of the regenerator, and a flow rate controller provided at the low-temperature end of the regenerator. The flow rate controller is configured to control the flow rate of a first DC flow flowing from the regenerator toward the pulse tube and the flow rate of a second DC flow flowing from the pulse tube toward the regenerator, so that the flow rate of the first DC flow is greater than the flow rate of the second DC flow.

Abstract: In a pulse tube refrigerator, a gas flow passage is connected to a high-temperature end of a low-temperature side pulse tube and a compressor, such that a working gas flows in the gas flow passage. The gas flow passage includes: a first flow passage connected to the high-temperature end of the low-temperature side pulse tube; a second flow passage connected to the compressor and having an outlet facing an outlet of the first flow passage; and a housing that gastightly accommodates the outlet of the first flow passage and the outlet of the second flow passage. The housing has a gastight space communicating with the outlet of the first flow passage and the outlet of the second flow passage, the gastight space located on a side of the low-temperature side pulse tube with respect to the outlet of the first flow passage.

Abstract: A system includes a multi-stage cryocooler having multiple stages and a temperature control system configured to regulate temperatures of the multiple stages of the multi-stage cryocooler. The temperature control system includes an input interface configured to receive (i) temperature setpoints for the stages of the multi-stage cryocooler and (ii) temperature information corresponding to temperatures measured at the stages of the multi-stage cryocooler. The temperature control system also includes processing circuitry configured to determine temperature errors and calculate at least one of a compressor stroke error and a pressure-volume phase error. The temperature control system further includes at least one controller configured to adjust at least one of a compressor setting and a pressure-volume phase of the multi-stage cryocooler.

Abstract: An aircraft air conditioning system comprising an ambient air supply line allowing a flow of ambient air therethrough, an ambient air cooling device to cool the air flowing through the ambient air supply line, and a discharge line connected to the ambient air cooling device and an aircraft cabin. A compressed air supply line allows a flow of compressed air therethrough, a compressed air cooling device is connected to the compressed air supply line to cool the air flowing through the compressed air supply line, and a discharge line is connected to the compressed air cooling device and to the aircraft cabin. A refrigerant circuit allows the flow of a two-phase refrigerant therethrough and converts the two-phase refrigerant from the liquid state into the gaseous state of aggregation and thereafter back again. The refrigerant circuit supplies cooling energy to the ambient air cooling device and the compressed air cooling device.

Abstract: In an air-conditioning system, during precooling or preheating control, a setting temperature is controlled such that a first temperature difference between the setting temperature and an indoor temperature is not less than a temperature difference at which a compressor performs operation, and the setting temperature is controlled to be changed to a target temperature when a second temperature difference between the indoor temperature and the target temperature is less than the first temperature difference. Since the compressor can be operated in the range from a low capacity to a medium capacity, operation efficiency of the air-conditioning apparatus can be increased, and the energy-saving operation with less power consumption can be realized. Since the operation capacity of the compressor can be readily suppressed with adjustment of the setting temperature, control is facilitated and the precooling control can be incorporated in various types of air-conditioning apparatuses.

Abstract: A system for killing pests in an affected area of a structure comprises a heat exchanger unit placed within an affected area, and a thermostatic control. The heat exchanger unit is configured to receive a flow of water from a faucet, and generate heated air by transferring heat from the flow of water received from the faucet to air flowing through the heat exchanger unit. The thermostatic control is configured to monitor a temperature of the flow of water as it is received by the heat exchanger unit, monitor a temperature of the air as it is received at an inlet of the heat exchanger unit, and automatically cease the flow of water to the heat exchanger unit when the temperature of the air received by the heat exchanger unit is greater than the temperature of the flow of water.

Abstract: Embodiments herein include electronically commutated (“EC”) motors, fans operated by such motors, cooling systems including the same, and related methods. In an embodiment, an electronically commutated fan motor is included. The fan motor can include a housing comprising an exterior wall, a shaft, a shaft drive assembly rotatably coupled to the shaft, a power input connector, a control input connector, a switch comprising a base and an actuator accessible outside the housing, the actuator comprising a first actuator position and a second actuator position. The fan motor can also include a controller configured to control the shaft drive assembly based on a control signal from the control input connector, a power signal from the power input connector, and a switch signal from the switch. Other embodiments are also included herein.

Abstract: A low-cost and highly-efficient air-conditioning system including an AHU using refrigerant of a heat pump cycle as a heat source, and capable of reducing an on/off cycle operation of compressors at a time of a low load, the system including: a plurality of outdoor units; an air handling unit; a plurality of independent heat pump cycles formed by connecting the plurality of outdoor units and the air handling unit by refrigerant pipes, each of the plurality of independent heat pump cycles including a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger; and a number control unit controlling, to satisfy a capacity demand corresponding to an air-conditioning load, based on a particular frequency range associated with the compressor, in which a certain compressor efficiency or more is obtained, a number of the compressors in operation and operating frequencies of the respective compressors in operation.

Abstract: Provided is a liquid supply system that can suppress a functional decline of relief valves and improve cooling efficiency. The system includes a sealed container (110), a pump (120) disposed in a cryogenic liquid (L) contained inside the sealed container (110) and driven by a linear actuator (130), a first conduit (K1) for directing the cryogenic liquid (L) pumped out by the pump (120) to a cooled device (300) provided outside the sealed container (110), a second conduit (K2) for returning the cryogenic liquid (L) from the cooled device (300) into the sealed container (110), and a relief valve (170) that is connected to the first conduit (K1) within the sealed container (110) and releases the cryogenic liquid (L) into the sealed container (110).

Abstract: A device includes a plurality of evaporators coupled to a payload bay with a multiplicity of coolant tubes in each evaporator, wherein each tube enters and then exits the payload bay, further comprising one or more cryogenic valves coupled to the coolant tubes; a pump to force coolant flowing through the evaporators; and a thermal box immediately outside the evaporators and payload bay to thermally seal the payload bay from the outside environment and reduce heat gain, the thermal box including high strength open cell panels and a vacuum or Vacuum Insulated Panels (VIPs) with polyurethane foam to fill the voids.

Abstract: A refrigerator having an ice making device, comprises: a case having an opening at one side thereof; a tray accommodation portion having opened upper and lower surfaces, and configured to be inserted into or withdrawn from the case through the opening; an ice tray accommodated in the tray accommodation portion, and containing water to be frozen to ice cubes; and an accommodation portion coupling unit for coupling the tray accommodation portion to the case. Water is poured onto the ice tray in a state that the ice tray has been accommodated in the tray accommodation portion, and then the ice tray is carried to be mounted to the case. This may solve the conventional problem that each ice tray has to be carried. Furthermore, since an external force such as hand trembling is transmitted to the ice tray via the tray accommodation portion, overflow of water is minimized.

Abstract: A refrigerator having an ice making device, comprises: a case having an opening at one side thereof; a tray accommodation portion having opened upper and lower surfaces, and configured to be inserted into or withdrawn from the case through the opening; an ice tray accommodated in the tray accommodation portion, and containing water to be frozen to ice cubes; and an accommodation portion coupling unit for coupling the tray accommodation portion to the case. Water is poured onto the ice tray in a state that the ice tray has been accommodated in the tray accommodation portion, and then the ice tray is carried to be mounted to the case. This may solve the conventional problem that each ice tray has to be carried. Furthermore, since an external force such as hand trembling is transmitted to the ice tray via the tray accommodation portion, overflow of water is minimized.

Abstract: A contactor for an air temperature and humidity control device is provided including a plurality of contact modules. Each contact module has a generally porous sidewall configured to define an internal space through which a hygroscopic material flows. A first airstream passes over a first portion of the plurality of contact modules. A second airstream passes over a second portion of the plurality of contact modules.

Abstract: A temperature-controlled display case includes a storage tank. The storage tank includes a single-piece inner skin having an integrated locating feature formed within and configured to locate a functional component of a refrigeration system relative to the inner skin. The storage tank includes a single-piece outer skin coupled to the inner skin and having an integrated mount formed within and configured to receive a caster for mobilizing the temperature-controlled display case. The storage tank also includes a first structural frame receiving a first end of the inner skin and a first end of the outer skin, and a second structural frame receiving a second end of the inner skin and a second end of the outer skin, wherein by said receiving of the inner skin and the outer skin the first structural frame and the second structural frame are configured to couple the inner skin and the outer skin.

Abstract: A cryogenic refrigerator includes a cylinder, a displacer accommodated in the cylinder so as to reciprocate inside the cylinder with a gap formed between the periphery of the displacer and the interior surface of the cylinder, and a depressed part formed on at least one of the periphery of the displacer and the interior surface of the cylinder. The ratio of the volume of the depressed part to the volume of the gap satisfies a condition of 8?Vd/Vg?75, where Vd is the volume of the depressed part and Vg is the volume of the gap.

Abstract: Air conditioning system for the pressurized cabin of an aircraft, said system (1) being characterized in that it comprises an air withdrawal module (3) configured for withdrawing ambient air from outside the aircraft, an air compression module (5) configured for compressing the withdrawn air flow (F1) and an air cooling module (10) comprising means (15) for storing at least one coolant configured for cooling the compressed air flow (F2, F3).