Integrated structure of air heater

摘要

An integrated structure of an air heater includes at least an air blowing unit, at least an air passage housing, a heating arrangement, and a overheat protection unit, which are fastened with each other to form the integrated structure, wherein the air blowing unit and the overheat protection unit are respectively fastened with the air passage housing, and the air passage housing is connected to the heating arrangement with screws. A simple and compact integrated structure for air heater is provided wherein its assembling method is easy and its manufacturing cost is low.

主权项

1. An integrated structure of an air heater, comprising:
at least an air passage housing, which is a frame-type casing having an air inlet at a first side thereof, an air outlet at a second side thereof, and an air passage member provided between said air inlet and said air outlet, wherein said air passage member is formed in arc shape, wherein said air passage housing comprises a plurality of first retaining members on an outer circumferential edge of said air inlet for coupling with a plurality of first coupling members respectively, wherein each of said first retaining members is a coupling base protruded from an inner surface of said air inlet of said air passage housing to define a U-shape groove having an opening facing inwards, wherein each of said first coupling members is a projecting member which is firmly received in said respectively U-shape groove, wherein said air passage housing further comprise a plurality of second coupling bases provided on an outer circumferential edge of said air outlet; at least an air blowing unit detachably fastened with said corresponding air passage housing, wherein said air blowing unit, which is an external rotor axial air blower, comprises a body frame which is a ring shaped frame and a plurality of blades rotatably installed in said body frame, wherein said air blowing unit comprises a plurality of first coupling members provided on an circumferential edge at a side portion of said body frame; a heating arrangement connected to said air passage housing to form the integrated structure, whereby air, which is drawn into said air passage housing by said air blowing unit, is heated by said heating arrangement and then guided to exit said air heater, wherein said heating arrangement comprises a heating member and a supporting frame, wherein said supporting frame is a rectangular frame which comprises a receiving portion defining a receiving cavity for receiving said heating member, wherein said heating arrangement further comprises a plurality of second projecting members on inner surfaces of said receiving portion for coupling with said heating member respectively, wherein said heating arrangement comprises a plurality of third projecting members at an outer side of said receiving portion for engaging with said plurality of second coupling bases respectively in such a manner that said air passage housing is firmly coupling with said heating arrangement; and an overheat protection unit connected with the heating arrangement to form the integrated structure for controlling heating operation of said heating arrangement, wherein said air passage housing and said overheat protection unit are respectively fastened with said heating arrangement, wherein said air inlet of said air passage housing has a shape corresponding to a shape of said body frame of said air blowing unit and said air outlet of said air passage housing has a shape corresponding to a shape of said heating arrangement.