Abstract: A heat exchanger includes a housing and a plate having four corner areas secured together, and four outer peripheral sides spaced from each other, and a flowing channel formed between corrugated structures of the housing and the plate, the housing and the plate each include a recess for forming a higher side platform and a lower side surface, and a casing and a board are disposed below the plate and have four corner areas secured together and four outer peripheral sides spaced from each other, and having a passageway formed between corrugated structures of the casing and the board, the casing and the board each include a depression for forming a higher platform and a lower side surface and located below the lower side surfaces and the higher side platforms of the housing and the plate respectively.

Abstract: A fuel reformer includes a primary carrier having a chamber between two separated protrusions for receiving a fuel material, two orifices formed in the protrusions, and two apertures communicative with the chamber of the primary carrier, and a secondary carrier disposed below the primary carrier and having a compartment formed between two separated swellings for receiving a regulating fluid and having two holes formed in the swellings and communicative with the apertures of the primary carrier, and the orifices of the protrusions are communicative with the compartment of the secondary carrier for allowing the regulating fluid to flow through the orifices of the primary carrier and the compartment of the secondary carrier.

Abstract: A heat exchanger includes a container having an outlet and an entrance coupled to an inlet and an exit, a receptacle having an entering port and a discharging port for circulating a fluid medium and having an entering opening and a discharging opening. A casing is disposed between the container and the receptacle and includes a passage coupled between the outlet of the container and the entering opening of the receptacle, to allow a heat medium to flow from the container into the receptacle, and a chamber communicating with the discharging opening of the receptacle and the entrance of the container. An air filtering device may be disposed in the casing for air filtering purposes, and for collecting and discharging water.