A heat pump apparatus module for heating and/or cooling supply water, the heat pump apparatus module including: an apparatus housing at least partly provided with an outer wall; a heat pump arrangement including a condenser, an evaporator, and a compressor arranged between said condenser and said evaporator, said compressor configured to transfer a heat transferring medium from said evaporator to said condenser; wherein said heat pump apparatus module is divided into at least two separate compartments being: an air-flow compartment including a first heat pump component being either the condenser or the evaporator, and being configured to allow air to flow through said air-flow compartment, said first heat pump component configured to utilize said air for heating or cooling said heat transferring medium; a first closeable compartment being accessible through a first closeable opening.

The present invention relates to a heat exchanger, a method for manufacturing the same, a heat recovery ventilator (HRV) including the same, and a method for defrosting and checking operations thereof.

A total heat exchange element includes a plurality of partition plates arranged at intervals. Each of the partition plates includes a base having a first principal surface and a second principal surface, and a moisture permeable membrane provided on or close to the first principal surface of the base. First flow paths through which air flows and second flow paths through which air having a higher water vapor pressure than the air in the first flow paths flows are alternately arranged with an associated one of the partition plates sandwiched between adjacent ones of the first flow paths and the second flow paths. In each of the plurality of partition plates, the first principal surface of the base faces a corresponding one of the first flow paths, and the second principal surface of the base faces a corresponding one of the second flow paths.

A method uses a sheet shaped member to separate two spaces from each other. The sheet shaped member includes a base having a first principal surface and a second principal surface, and a moisture permeable membrane provided on or close to the first principal surface of the base. The first principal surface of the base is arranged in one of the two spaces having a lower water vapor pressure when the two spaces separated from each other by the sheet-like member have different water vapor pressures.

Disclosed is a ventilation module for improving the efficiency of a vehicle HVAC system. The ventilation module includes a return air duct having an outlet to be coupled to the HVAC system. The ventilation module also includes a fresh air duct, a heat exchanger, and first and second doors. The first and second doors connect the return and fresh air ducts upstream and downstream of the heat exchanger. By selectively opening or closing the first and second doors, the ventilation module provides the HVAC system with desired return, fresh or mixed air through the outlet of the return air duct.

A method of minimizing compressor use in an HVAC system for an IT space includes configuring an HVAC system to cool an IT space, providing a control system to operate the HVAC system, the control system having software configured to calculate economization mode minimum achievable X-Factor for a predetermined period of time, providing at least one parameter to the control system, the at least one parameter including X-Factor history and period weather forecast(s), setting temperature set points for each forecast interval, and analyzing the temperature set points according to maximum and minimum temperature parameters for the IT space, with intervals with set points violating the maximum temperature parameter being designated as intervals for which the compressor will operate while intervals with set points violating the minimum temperature parameter are assigned the minimum temperature set point.

A method of defrosting an energy recovery ventilator unit. The method comprises defrosting an energy recovery ventilator unit. The method comprises activating a defrost process of an enthalpy-exchange zone of the energy recovery ventilator unit when an air-flow blockage in the enthalpy-exchange zone coincides with a frost threshold in the ambient environment surrounding the energy recovery ventilator unit. The method also comprises terminating the defrost process when a heat transfer efficiency across the enthalpy-exchange zone returns to within 10 percent of a pre-frosting heat transfer efficiency wherein, the heat transfer efficiency is proportional to a temperature difference between an intake air zone of the energy recovery ventilator and a supply air zone of the energy recovery ventilator divided by a temperature difference between an return air zone of the energy recovery ventilator and the intake air zone.

Some embodiments of the present disclosure provide a heat recovery device and an air conditioning system. The heat recovery device includes: a shell, provided with an indoor air return port, a first outdoor air inlet and an air outlet; a fresh air heat recovery assembly, disposed in the shell, the fresh air heat recovery assembly including a first heat exchange passage and a second heat exchange passage exchanging heat with each other; and an air valve assembly, disposed in the shell, and located between the fresh air heat recovery assembly and the indoor air return port, the air valve assembly having a first position and a second position.

A heat exchange device for air cooling for conditioning and climate control systems for server rooms and the like, which comprises: an air/air heat exchanger, designed to be passed through by a primary air stream along a first trajectory from an intake region to an outflow region and by a secondary air stream along a second trajectory from a corresponding intake region to a corresponding outflow region, water dispensing elements adapted to wet the heat exchanger downward from above, elements of collecting the water that descends from the heat exchanger, a recirculation pump for returning the air-cooling water from the collection elements up to the dispensing elements arranged above the heat exchanger; the water dispensing elements comprise a plurality of nozzles arranged side by side, or rows of nozzles, which are adapted to dispense water with a flow-rate that decreases starting from the intake region for the primary air stream toward the outflow region of the heat exchanger.

A damper assembly in a heat recovery ventilator, comprising a rotor, a bearing, drive means, and sealing means. The rotor rotates about an axis of rotation and includes a pair of end walls in spaced-apart relation to define a substantially open periphery. The rotor also includes an air-deflecting member connected between the end walls. The bearing is associated with one of the end walls and is located at the axis of rotation, to support rotation of the rotor. The drive means rotates the rotor about the axis of rotation and positions the air-deflecting member in first and second orientations. The sealing means is in slide contact engagement with the rotor and seals between the rotor and a surrounding damper compartment of the ventilator. The sealing means isolates the exhaust airstream from the supply airstream in the damper compartment while the air-deflecting member is in the first or the second orientation.