PTC heater

• US 20030015520A1
• Filed: 02/14/2002
• Published: 01/23/2003
• Est. Priority Date: 07/18/2001
• Status: Active Grant

• Current Assignee: Guangquan Zhang
• Original Assignee: Guangquan Zhang
• Inventors: Jiang, Guomo
• Granted Patent: US 6,723,966 B2
• Time in Patent Office: Days
• US Class Current: 219/505
• CPC Class Codes: F24H 9/1863 Arrangement or mounting of electric heating means
• CPC Class Codes: F24H 9/1872 PTC
• CPC Class Codes: H05B 2203/02 Heaters using heating elements having a positive temperature coefficient
• CPC Class Codes: H05B 3/141 Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
• CPC Class Codes: H05B 3/50 heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

Abstract

A PTC heater mainly comprises PTC ceramic sheets and cooling fins, and it comprises an inner support in which the PTC sheets are disposed, two electrode plates being disposed on both sides of the support and the PTC sheets to abut against the PTC sheets tightly, the cooling fins being disposed at the exterior of the electrode plates, insulating plates being mounted between the cooling fins and the electrode plate, in the interior of upper and lower ends of the two cooling fins, corresponding clamping grooves being formed through which the two cooling fins are clamped together, and elastic rods being inserted in the clamping grooves. Mechanical clamping method is adopted. The fitting structure of the elastic rod and the clamping grooves of cooling fins has taken the place of the traditional gluing structure, so the problem of aging of the silica gel and the lowering of power in traditional products is solved thoroughly. The PTC heater is prevented from sparking and shorting and has a good safety and cooling performance. The surface of the heater is not electrified so that the heater has more safety. The heater has an original structure and good shape.

Claims

1. A PTC heater which mainly comprises PTC ceramic sheets and cooling fins, wherein it comprising an inner support (10) in which the PTC sheets (4) are disposed, two electrode plates (9, 13) being disposed on both sides of the support (10) and the PTC sheets (4) to abut against the PTC sheets (4) tightly, the cooling fins (1, 8) being disposed at the exterior of the electrode plates, insulating plates (3, 12) being mounted between the cooling fins and the electrode plate, in the interior of upper and lower ends of the two cooling fins (1, 8), corresponding clamping grooves (2) being formed through which the two cooling fins (1, 8) are clamped together, and elastic rods (7) being inserted in the clamping grooves (2).

2. A PTC heater as claimed in claim 1, wherein the corresponding openings shaped as the PTC sheets (4) are formed on the support (10), the PTC sheets (4) are placed in the openings on the support (10).

3. A PTC heater as claimed in claim 1, wherein the support (10) is formed of several connecting parts.

4. A PTC heater as claimed in claim 1, wherein the cooling fins (1, 8) are ultra-thin cooling fins.