The present embodiments refer to a ventilation unit, in particular for recreational vehicles like campers, caravans or mobile homes. The ventilation unit comprises an air intake arrangement configured to define an intake air flow path from the environment of a confined space into the confined space in an installed state of the ventilation unit. The ventilation unit further comprises an air exhaust arrangement configured to define an exhaust air flow path from the confined space to the environment of the confined space in an installed state of the ventilation unit. According to the present embodiments, the ventilation unit comprises a heat transfer unit configured to conduct a passive heat transfer between intake air within the intake air flow path and exhaust air within the exhaust air flow path. Furthermore, the present embodiments refer to a recreational vehicle like a camper, caravan or mobile home comprising such a ventilation unit.

A temperature conditioning module 6 having an integrated waste heat cooling circuit, comprising; a housing 10 having at least one air inlet 12 and a first 16 and second 20 spaced apart air outlets, one or more motor driven impellers 40A, 40B, one or more fluid recirculation pumps 52: one or more thermoelectric devices 80 that is located in the first passage 14 of the housing between the one or more motor driven impellers and the first air outlet 16, one or more heat exchangers 54 that is located in the second passage 18 of the housing, between the at least one motor driven impeller and the second air outlet 20; and a fluid circulation circuit 50 that is contained entirely within the housing, and passing fluid in thermal communication with the waste side of the one or more thermoelectric devices 80 to thereby absorb at least a portion of the waste heat and then to expel it to the heat exchanger 54.

The invention relates to a motor vehicle having a water tank (10) with a first inner chamber (23) for separating and conducting away water from a first air flow (15) flowing through the first inner chamber (23). The water tank (10) is designed as a heat exchanger, comprising a heat exchanger element (20) for transferring thermal energy between the first air flow (15) and a second air flow (50). At least one guide structure (8) is provided for guiding the second air flow to the heat exchange element (20) in a targeted manner. In addition, at least one control element (34) is provided, with which the transfer of the thermal energy between the first air flow (15) and the second air flow (50) can be enabled in a first operating state, and can be at least partially inhibited in a second operating state.

Energy-saving method/system for heating and humidifying a building or car's saloon are disclosed. The method includesdrawing in an outside airstream,passing it via a dry channel and then, via a wet channel, in an opposite direction. Thereafter, the outside airstream is heated and directed to the building as supply air. An exhaust airstream from the building is introduced into a product channel. The wet channel is situated between the dry and product channels. The wet channel is in pairwise heat-exchange interactions with the dry and product channels. Water vapor, contained in the exhaust airstream, is condensed, discharged into the atmosphere at a temperature closed to the dew point. The outside airstream, passed along the wet channel, is transfer-heated and humidified by the exhaust airstream. Water from the product channel is used for wetting the wet channel. The system includes at least two membranes arranged between the channels.

The disclosed embodiments include a vehicular ventilation module having control circuitry, a return air duct, a fresh air duct, a heat exchanger, and a door joining an upstream portion of the return air duct upstream of the heat exchanger and an upstream portion of the fresh air duct upstream of the heat exchanger. The fresh air duct has an air inlet and an air outlet downstream of the air inlet. The heat exchanger is thermally coupled to the return air duct upstream of the return air outlet and to the fresh air duct downstream of the return air inlet. The door selectively opens to enable air to pass between the fresh air duct and the return air duct. The control circuitry is configured to operate in a first mode of operation, including having the door open. The return air outlet is configured to provide air to the HVAC system.

The invention relates to an exchanger arrangement (3) for the heat transfer and/or selective material transfer between a first fluid (F1) and a second fluid (F2), which can flow through the arrangement (3), said arrangement (2) being constituted of a multitude (n) of adjacent local exchanger elements (E.sub.1, E.sub.2, . . . , E.sub.n). The exchanger arrangement (3) has at least in some sections a cylindrical shape or the shape of a segment thereof or a prismatic shape having a polygonal base or the shape of a segment thereof. The adjacent local exchanger elements (E.sub.1, E.sub.2, . . . , E.sub.n) are flat structures that are either wedge-shaped or sheet-like.

An exchanger element for use on board a vehicle for a passenger compartment and/or the engine bay of a vehicle. The exchanger element includes an exhaust air flow path and a feed air flow path, wherein the exhaust air flow path and the feed air flow path are separated from one another by partition sections that have heat-transmitting wall regions. The exhaust air flow path forms a fluid connection from the interior of the vehicle to the outer surroundings of the vehicle. The feed air flow path forms a fluid connection from the outer surroundings of the vehicle to a location on board the vehicle. The exchanger element is embedded in a package, the outer surface area shape of which matches the inner dimensions of an installation space on board the vehicle for the installation of the exchanger element.

A tempering system includes a refrigerant circuit with a heat-emitting heat exchanger around which air to be heated can flow, and a heat-absorbing heat exchanger around which air to be cooled can flow, and an air guide arrangement for optionally conducting exhaust air extracted from an interior to be thermally conditioned via the heat-emitting heat exchanger or the heat-absorbing heat exchanger and for optionally conducting fresh air via the heat-absorbing heat exchanger or the heat-emitting heat exchanger. The air guide arrangement is configured such that in a fresh air heating mode, fresh air to be conducted into the interior to be thermally conditioned is conducted as air to be heated via the heat-emitting heat exchanger and exhaust air to be extracted from the interior to be thermally conditioned is conducted as air to be cooled via the heat-absorbing heat exchanger.

The HVAC system of a vehicle passenger compartment with air flow alteration, which pertains to the system of air conditioning with several working modes for air conditioning of the passenger compartment, i.e. to the system that allows for cooling, heating, and dehumidifying of the space inside the vehicle passenger compartment, according to the present invention, comprises a refrigerant cycle which includes a compressor (1), heat exchanger (2) for heating, the first adjustable throttle valve (5), medium pressure heat exchanger (3), the second adjustable throttle valve (6), and an evaporator (4); and that comprises a subsystem (300) for altering the air flow topology inside which are placed the medium pressure heat exchanger (3) and the evaporator (4), a device (301) for additional heating inside which is placed the heat exchanger (2) for heating, external air flow which leads the air through the subsystem (300) for altering the topology of air flow into the environment, and the internal air flow that leads the air through the subsystem (300) for altering the air flow topology and the device (301) for additional heating into the passenger compartment; while the subsystem (300) for altering the air flow topology has at least two working modes, so that in the first working mode the external air flow includes the medium pressure heat exchanger (3), and the internal air flow includes the evaporator (4), whereas in the second working mode the external air flow includes the evaporator (4), and the internal air flow includes the medium pressure heat exchanger (3); and where the said system (300) realises at least one of the functions of heating, cooling, and dehumidifying of the passenger compartment air.

An environmental control system for thermally conditioning air within an enclosed space comprising: a refrigerant circuit having a compressor, an indoor heat exchanger, an expansion device, and an outdoor heat exchanger. The system further comprises an intake flowpath for directing an intake flow of fresh air to the enclosed space, wherein a heat-transfer section of the indoor heat exchanger is located within the intake flowpath to thermally condition the intake flow of fresh air before entering the enclosed space. The system further comprises an exhaust flowpath for directing an exhaust flow of thermally conditioned air to an external environment. A recovery heat exchanger is configured to transfer thermal energy between the exhaust flow and the intake flow at a location within the intake flowpath that is upstream of the heat-transfer section of the indoor heat exchanger.