A cooling system includes a cooling device having a first cooling coil and a second cooling coil, a first heat transfer fluid in fluid communication with the first cooling coil, a second heat transfer fluid in fluid communication with the second cooling coil, a first heat exchanger in fluid communication with the first heat transfer fluid and the second heat transfer fluid, a second heat exchanger in fluid communication with the second heat transfer fluid and a source of external air, a system of fluid control devices in fluid communication with the second heat transfer fluid and configured to minimize a change in a total pressure drop of the second heat transfer fluid when the cooling system switches between operating modes, and a controller configured to selectively control the cooling device and the system of fluid control devices to operate the cooling system in each of the operating modes.

The present disclosure sucks air in hospital room using a compressor to maintain an inner portion of the hospital room in a negative pressure state, and creates a high-temperature and humid environment by a water spray, the compressor, and a sterilization chamber to kill bacteria or viruses. In addition, the compressor uses power generated by a turbine, and is configured so that heat of air coming out of the compressor is recovered to a suction side of the compressor, such that efficiency of a system may be secured. Further, some of clean air generated while passing through the sterilization chamber may be directly supplied again to the hospital room through a bypass means.

A heating, ventilation, and/or air conditioning (HVAC) blower assembly includes a motor and a fan wheel, wherein the motor drives rotation of the fan wheel about an axis of rotation. A blower housing accommodates the fan wheel within a hollow portion and is defined by a base, a curved boundary, a front boundary, and a rear boundary. An inlet port extending through the front boundary facilitates intake of airflow into the fan wheel. An outlet port extending through the base facilitates expulsion of the airflow from the fan wheel. A first portion of the curved boundary includes an involute profile and a second portion of the curved boundary includes a footing extending from the first portion to the base such that airflow exiting through the outlet port is guided away from the fan wheel by an interior-facing surface of the footing.

A dehumidifier includes a machine body including a case. The case includes an air inlet, an air outlet, and an air duct communicating the air inlet and the air outlet. The dehumidifier further includes an axial flow fan arranged in the air duct. An air outlet direction of the axial flow fan is configured to face the air outlet. The dehumidifier also includes a compressor arranged inside the case and side by side with the axial flow fan.

An air conditioning system is provided with an integrated heat exchanger. The air conditioning system generates heating air or cooling air through the integrated heat exchanger that adjusts the temperature of conditioning air by circulating coolant, thus securing cooling and heating efficiency. The air conditioning system adjusts temperature by the coolant circulated in the integrated heat exchanger such that a temperature adjustment door for adjusting the temperature of the conditioning air is eliminated, the number of components is decreased, and the size of an overall package is reduced.

The invention relates to an air condition arrangement for cooling of a space, comprising a cooling heat exchanger loop (20, 4, 30, 5) having a fluid in operational connection with an evaporator (2) and a condenser (3), wherein a cooling media (31), preferably having a temperature in the range of 0-+2 C., in said condenser (3) is arranged to absorb heat from said fluid, which fluid in turn absorbs heat from air flowing through said evaporator (2) to provide a cooled air flow out from said air condition arrangement (1), characterized in that said cooling media (31) at least partly includes ice and that said cooling media (31) is arranged to drive said heat exchanger loop (20, 4, 30, 5).

Air conditioning unit for a structure defining a space to be conditioned, the air conditioning unit comprising a structure comprising a lateral wall and a pair of terminal walls connected together to defining a space and a first and a second openings realized in a wall opposite to lateral wall and configured to be faced to respective openings realized in structure, the air conditioning unit housing an air conditioning arrangement housed within space and comprising a cooling coil, first ventilation means and second ventilation means, the air conditioning unit comprises at least a divider wall configured to divide the space into at least two portions and is configured to comprise a free cooling arrangement provided with a first and a second dampers suitable to be housed within one between first and second openings of structure and a third damper suitable to be housed through lateral wall.

A heat pump including a refrigerant circuit configured to circulate flammable refrigerant, and an indoor unit configured to be arranged in an indoor space. The refrigerant circuit has a compressor, a utilisation-side heat exchanger, an expansion device and a heat-source-side heat exchanger connected by piping. The an indoor unit includes an outer casing having a top, and a sealed container accommodated in the outer casing. The sealed container has a bottom and a top and accommodates at least one of the compressor, the utilisation-side heat exchanger, the expansion device, and the heat-source-side heat exchanger. The sealed container has a release opening to exhaust leaking refrigerant to an exterior of the outer casing of the indoor unit.

An HVAC system includes: an outer tube; an inner tube coaxially disposed in the outer tube; and a rotor coaxially disposed in the inner tube. The inner tube forms an outer airflow passage between the outer tube and the inner tube. The rotor forms an inner airflow passage between the inner tube and the rotor. The HVAC system further includes a compression stage disposed at a first position in a central axis direction of the outer tube, an expansion stage disposed at a second position, different from the first position, in the central axis direction, and a heat exchanger disposed between the compression stage and the expansion stage in the central axis direction. The compression stage includes a first rotary blade that is connected to the rotor. The expansion stage includes a second rotary blade that is connected to the rotor. The heat exchanger includes a plurality of partition walls that separate a first channel and a second channel from one another. The first channel and the second channel are inserted in the inner airflow passage and the outer airflow passage, respectively.