An air conditioning system including one or more supercooling heat exchangers, a supercooling expansion device, a temperature sensor, and a pressure sensor so as to measure and control a current supercooling degree value of a fluid coolant flowing between a fluid pipe and a plurality of indoor devices.

An automated refrigerant recharging system determines whether a cooling load parameter of a direct expansion (DX) cooling system that cools information technology (IT) modules of an information handling system (IHS) has reached a defined recharging threshold that results in a response of the pressure value for measurement by the pressure transducer. In response to the cooling load parameter being equal to or greater than the defined recharging threshold, a controller determines whether a pressure value of the refrigerant of the DX cooling system is less than a defined target pressure value corresponding to the defined recharging threshold. In response to determining that the pressure value of the refrigerant of the DX cooling system is less than the defined target pressure value, the controller autonomously opens a control valve to transfer refrigerant to the DX cooling system.

A refrigerant cycle apparatus is configured to suppress extension of defrost time. The refiigerant cycle apparatus includes: a refrigerant circuit including a compressor, a heat source heat exchanger having a main heat exchange unit, a sub heat exchange unit and a pressure loss portion disposed between the main heat exchange unit and the sub heat exchange unit, an expansion mechanism, a utilization heat exchanger, and a flow direction switching mechanism configured to switch a flow direction of a refrigerant; a first temperature sensor configured to measure first refrigerant temperature between the main heat exchange unit and the pressure loss portion; a second temperature sensor configured to measure second refrigerant temperature between the pressure loss portion and the expansion mechanism; and a controller configured to control the flow direction switching mechanism to switch between normal operation and defrost operation. The controller has control modes for the defrost operation, including a control mode of terminating the defrost operation based on the first refrigerant temperature and a control mode of terminating the defrost operation based on the second refrigerant temperature.

A heat pump system includes a first heat pump arrangement configured to operate with a first heat pump medium including CO2; a second heat pump arrangement configured to operate with a second heat pump medium including water; and a coupler for thermally coupling the first heat pump arrangement to the second heat pump arrangement.

A portable system for managing the temperature of a patient during transport includes a heater/cooler configured to be in fluid communication with a heat transfer catheter or a heat transfer surface pad; a pump for circulating heat exchange fluid; an alternating current power supply; and a processor configured to indicate if the alternating current power supply connection to the source of alternating current is interrupted. A rechargeable battery may be configured to provide power to the system when the alternating power supply is not connected to a source of alternating current. If the system is powered on and the connection to the alternating current source is interrupted, the system may automatically switch to receiving power from the rechargeable battery. The processor may alert an operator of the interruption of the connection to the alternating current source and indicate to the operator the amount of energy remaining in the battery.

The purpose of the present invention is to provide a control device which is for an extraction device, and is capable of estimating the total amount of air intrusion more accurately and optimizing the operation of the extraction device. A control device (7) that controls an extraction device (6) provided in a refrigerator (1) is provided with: an estimating unit that estimates the total amount of air intruding into the refrigerator (1); a determining unit that determines whether or not the total amount of air intrusion is equal to or greater than a preset allowable value; an activation control unit (6) that determines an activation duration time of the extraction device (6) on the basis of the total amount of air intrusion when the total amount of air intrusion is equal to or greater than the allowable value, and that activates the extraction device (6) for the activation duration time; an exhaust air amount calculation unit that calculates an amount of exhaust air that is the amount of air actually exhausted by the extraction device (6); and a correction unit that corrects at least one among the total amount of air intrusion and the activation duration time when the difference between the total amount of air intrusion and the amount of exhaust air is equal to or larger than a predetermined amount.

A refrigeration cycle apparatus in which a compressor, a heat-source-side heat exchanger, a decompressor, and a use-side heat exchanger are connected by pipes to allow refrigerant to be circuited as a refrigeration cycle. The refrigeration cycle apparatus includes a controller which controls an operation of each of devices. The controller sets an operation mode to a specific operation mode for determining where abnormality occurs based on states of the compressor, the heat-source-side heat exchanger, the decompressor and the use-side heat exchanger in the case where an operating state of one of a plurality of element devices to be controlled by the controller is changed from a first state to a second state, the element devices being included in the compressor, the heat-source-side heat exchanger, the decompressor and the use-side heat exchanger.

A battery system for powering a transportable thermal management system for altering or maintaining a patient's body temperature by endovascular and/or external heat exchange.

A method of initiating a low-energy cooling mode using a controller of an HVAC system includes measuring a temperature of ambient air proximal to a condenser coil and determining whether the temperature of the ambient air proximal the condenser coil is less than a temperature threshold. If the temperature of the ambient air is less than the temperature threshold, the HVAC system is configured to operate in a low-energy cooling mode. In the low-energy cooling mode, the controller opens a first bypass valve to allow a refrigerant to bypass a compressor and the compressor is powered off. The HVAC system is operated until a cooling demand has been met.

An air conditioner that is a refrigeration apparatus has, in a refrigerant circuit, a compressor, an outdoor heat exchanger that functions as an evaporator in a heating operation, an indoor heat exchanger that functions as a condenser in the heating operation, and a four way valve. The refrigerant circuit is configured in such a way that a high-pressure value of the refrigerant circuit in a defrost operation is lower than a high-pressure value of the refrigerant circuit in the heating operation. An end-of-defrost frequency decrease rate, which is a rate of decrease in the operating frequency of the compressor in the defrost operation, is set faster than a normal frequency decrease rate, which is a rate of decrease in the operating frequency of the compressor in the heating operation.