A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a heating fluid circuit, a cooling fluid circuit, and a storage fluid circuit. A thermal system of the HVACR system absorbs energy from the storage fluid circuit and rejects it to the heating fluid circuit. The storage fluid circuit includes thermal storage tanks containing thermal storage material that can provide energy for heating or absorb energy for cooling depending on the state of the thermal storage material. Heating can be provided using the heating fluid circuit and the heat provided by the thermal system. Cooling can be provided using the cooling fluid circuit by absorbing energy from the conditioned space using a cooling fluid and rejecting energy from the cooling fluid to the storage fluid circuit. The thermal storage tanks can have heat added to them using an air source heat pump system to support heating operations.

The present disclosure relates to the technical field of heat pumps, in particular to an air source CO.sub.2 heat pump system for preventing an evaporator from frosting by using heat of a heat regenerator. The air source CO.sub.2 heat pump system mainly includes an air source heat pump system, a regenerative heat exchange tank and a cooling pump. Through the regenerative heat exchange tank, on the one hand, the temperature drop of regenerative heat of the system is further increased and throttling loss is reduced; on the other hand, the heat generated by the regenerative temperature drop is configured for heat storage used for defrosting, and configured for overheating temperature rise.

To avoid decline in the efficiency of a compressor at a low load, a thermal storage air conditioner has a refrigerant circuit (11) which has a compressor (22), an outdoor heat exchanger (23), and an indoor heat exchanger (72) and performs a refrigeration cycle, and a thermal storage section (60) which has a thermal storage medium and exchanges heat between the thermal storage medium and a refrigerant of the refrigerant circuit (11). The thermal storage air conditioner performs a simple cooling operation in which in the refrigerant circuit (11), the refrigerant is condensed in the outdoor heat exchanger (23) and evaporates in the indoor heat exchanger (72), and a cooling and cold thermal energy storage operation in which in the refrigerant circuit (11), the refrigerant is condensed in the outdoor heat exchanger (23) and evaporates in the indoor heat exchanger (72), and in which the thermal storage medium in the thermal storage section (60) is cooled by the refrigerant. The thermal storage air conditioner has an operation control section (100) which, if a rotational speed of the compressor (22) is slowed down to a predetermined lower reference value in the simple cooling operation, switches an operation of the thermal storage air conditioner from the simple cooling operation to the cooling and cold thermal energy storage operation to increase the rotational speed of the compressor (22).

A system for deicing an external evaporator for heat pump systems includes at least one compressor, at least one internal condenser, at least one external evaporator, at least one liquid separator, and a system of ducts for cooling fluid. The deicing system includes a secondary refrigeration circuit, which includes a tank for storing a heat transfer fluid, and a first heat exchanger immersed in the heat transfer fluid and adapted to transfer heat to the heat transfer fluid by cooling the cooling fluid. The system further includes a bypass refrigeration circuit, which includes the tank, and a second heat exchanger immersed in the heat transfer fluid and adapted to absorb heat from the heat transfer fluid by heating the cooling fluid. The system also includes a deicing circuit adapted to convey cooling fluid.

The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system. The HVAC system includes an air handling unit configured to transfer heat between a refrigerant and an airflow, a first heat exchanger configured to receive the refrigerant from the air handling unit and transfer heat between the refrigerant and a first working fluid, a cooling bank including a vessel and a coil disposed in the vessel, wherein the coil is configured receive the first working fluid from the first heat exchanger and configured to transfer heat between the working fluid and a second working fluid within the vessel, and a second heat exchanger configured to receive the second working fluid and to transfer heat between the second working fluid and the airflow, wherein the second heat exchanger is disposed upstream of the air handling unit with respect to a flow path of the airflow.

In one aspect, an air conditioning system is provided. The air conditioning system includes a refrigeration circuit having a refrigerant and an economizer circuit, and a subcooling circuit thermally coupled to the refrigeration circuit, the subcooling circuit including a thermal energy storage (TES) unit and a phase change material (PCM) for thermal exchange with the refrigerant.

The present disclosure relates to a heating, ventilation, and/or air conditioning (HVAC) system. The HVAC system includes an air handling unit configured to transfer heat between a refrigerant and an airflow, a first heat exchanger configured to receive the refrigerant from the air handling unit and transfer heat between the refrigerant and a first working fluid, a cooling bank including a vessel and a coil disposed in the vessel, wherein the coil is configured receive the first working fluid from the first heat exchanger and configured to transfer heat between the working fluid and a second working fluid within the vessel, and a second heat exchanger configured to receive the second working fluid and to transfer heat between the second working fluid and the airflow, wherein the second heat exchanger is disposed upstream of the air handling unit with respect to a flow path of the airflow.

Reliability of devices such as lighting fixtures, is improved by replacing an inductor based voltage inverter to power the device with a switching constant current PWM controller. Avoiding use of an inductor and matching capacitor is made possible by a high voltage power input that exceeds the voltage requirements of the device. The power is pulse width modulated with a current feedback to control duty cycle, and thus average device current.

A portable cooler container is provided. The temperature control system cools a chamber of the container to transport temperature sensitive contents via the container. An electronic display screen on one of the lid and the container body selectively displays an electronic shipping label for the portable cooler container.

A portable cooler container is provided. The temperature control system cools a chamber of the container to transport temperature sensitive contents via the container. An electronic display screen on one of the lid and the container body selectively displays an electronic shipping label for the portable cooler container.