HOT AIR BLOWER

• US 3,575,583 A
• Filed: 09/05/1968
• Issued: 04/20/1971
• Est. Priority Date: 09/05/1968
• Status: Expired due to Term

• Current Assignee: James A. Brown
• Original Assignee: James A. Brown
• Inventors: Brown, James A.
• Application Number:
  US04/757,543
• Time in Patent Office: 957 Days
• US Class Current: 392/379
• CPC Class Codes: F24H 3/0405 using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between F24H3/06, F24H3/08, F24H3/10 take precedence

Abstract

A hot air blower of simple, compact and inexpensive construction wherein the air heating means and blower means are both enclosed within a single housing comprising a spaced apart pair of sheet members having sheet metal wall means extending therebetween to form enclosures for the heater and blower respectively, the blower housing or scroll forming a portion of said wall means enclosing the blower, and both the heater and the blower being supported between the sheets on removable panels permitting easy access and replacement of parts. The construction and arrangement of the heater and blower within the space defined by the sheetlike members insures a uniform air flow around the heaters preventing '"'"''"'"''"'"''"'"'hot spots,'"'"''"'"''"'"''"'"' and control means are provided operable to maintain a constant hot air temperature at the outlet of the unit, together with safety devices for preventing overheating.

Claims

1. An air heater and blower comprising, in combination:

a pair of spaced-apart, parallel sheet members of generally rectangular configuration, the space between said sheets being divided into a heater compartment and a blower compartment by a partition extending from a first marginal edge of the sheets and terminating spaced from the opposite marginal edge of the sheets providing an opening establishing communication between said compartments adjacent said opposite marginal edge, said blower compartment being enclosed by a spiral scroll extending between and secured to said sheets terminating at one end tangent to said partition and at its opposite end tangent to said opposite marginal edge of the sheets adjacent said opening, and said heater compartment being enclosed by peripheral wall means extending between said sheets;

blower means in said blower compartment supported between said sheets and housed within said scroll, an air inlet in one of said sheets communicating with said blower compartment, motor means coupled to said blower for operating the same removably mounted externally on the sheet opposite said air inlet, heater means mounted within said heater compartment, a heated air outlet in the end wall of said heater compartment immediately adjacent said first marginal edge of said sheets diagonally opposite the opening establishing communication between the compartments, an upright baffle in said heater compartment secured along opposite marginal edges to said sheets and positioned separating said heater means from said heated air outlet extending generally parallel to said first marginal edge of said sheets from said heater compartment end wall toward said dividing partition and terminating spaced from said partition a predetermined distance, and control means for controlling the operation of said blower means and said heater means.

2. The invention as defined in claim 1 characterized in that said sheets are each provided with outwardly facing peripheral flanges, and said peripheral wall means includes a platelike paNel member having said heater means connected thereto, said panel member being removably secured to said sheet flanges to removably support said heater means within the heater compartment.

3. The invention as defined in claim 1 characterized in that one of said sheets exhibits an opening therethrough sized to permit entry and removal of said blower, and a cover plate is removably mounted covering said opening, with said plate having an aperture constituting said air inlet for said blower means.

4. The invention as defined in claim 1 characterized in that said control means comprises switch means for initiating operation of said heater means and of said blower means, together with timer means responsive to actuation of the switch for controlling the length of a cycle of operation, and thermostatically controlled means for operating said heater means to continuously maintain the heater compartment at a preselected temperature independently of switch actuation.

5. The invention as defined in claim 2 characterized in that said control means further includes a second thermostatically controlled means coupled to said heater means and responsive to actuation of said switch for maintaining heated air flowing from said air outlet at a preselected temperature during each cycle of operation.