Apparatus for heating gases

• US 4,990,748 A
• Filed: 04/12/1989
• Issued: 02/05/1991
• Est. Priority Date: 01/26/1989
• Status: Expired due to Term

• Current Assignee: Fritz Eichenauer GmbH & Company KG Georg-Todt-Str
• Original Assignee: Fritz Eichenauer GmbH and Company KG
• Inventors: Starck, Roland
• Primary Examiner(s): Envall, Jr., Roy N.
• Application Number:
  US07/337,084
• Time in Patent Office: 664 Days
• Field of Search: 219/365, 219/539, 219/541, 219/553, 219/544, 219/548, 219/504, 219/505, 338/22, 361/383, 361/388, 361/389
• US Class Current: 392/485
• CPC Class Codes: H05B 2203/02 Heaters using heating elements having a positive temperature coefficient
• CPC Class Codes: H05B 3/14 the material being non-metallic
• CPC Class Codes: H05B 3/50 heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins

Abstract

An apparatus for heating gases, particularly air, with a heating unit having a mounting part, at least one PTC component, at least one insulating frame part surrounding the latter, at least one contact plate and at least one insulating support. The PTC component is surrounded by the frame part being inserted in the mounting part and on at least one flat side rests a contact plate and is covered by an insulating support. Heat emission lamellas are mounted in a clamping manner on the heating unit to ensure an effective heat emission to the surrounding air or gas.

Claims

1. Apparatus for heating gases with a heating unit having a mounting part, at least one PTC component inserted in the mounting part, at least one insulating frame surrounding the at least one PTC component, at least one contact plate and at least one insulating support, the at least one contact plate resting on at least one flat side and being covered by the at least one insulating support, and heat emission lamellas resting in a clamping manner on said heating unit , said lamellas including openings surrounding the heating unit said openings being bounded by two facing tongues bent out of a plane of the lamellas, wherein a connection area of the two tongues to a body of the respective lamellas are spaced at a distance corresponding to a height of the heating unit, and wherein an internal spacing of ends of the respective tongues is less than the height of the heating unit.

2. Apparaatus according to claim 1 wherein the lamellas are provided with reinforcing grooves.

3. Apparatus according to claim 2, wherein said grooves are directed at right angles to the tongues.

4. Apparatus according to one of claims 1 or 2, wherein the mounting part has a U-shaped profile.

5. Apparatus according to one of claims 1 or 2, further comprising cover plates resting on the at least one insulating support.

6. Apparatus according to claim 5, wherein at least one of the mounting part, cover plates and lamellas are made from one of aluminium and an aluminium alloy.

7. Apparatus according to one of claims 1 or 2, wherein the at least one insulating support is formed from metal oxide.

8. Apparatus according to one of claims 1 or 2, wherein the at least one insulating frame part is made from Rayton.

9. Apparatus according to one of claims 1 or 2, wherein the at least one frame is an insulating frame.

10. Apparatus, according to claim 1, wherein the at least one contact plate is firmly connected to the at least one insulating frame.

11. Apparatus according to claim 10, wherein the at least one contact plate is riveted to the at least one insulating frame in a fastening area of an end face thereof.

12. Apparatus according to claim 11, wherein at least one connecting tongue is riveted to the at least one contact plate.

13. Apparatus according to one of claims 10 or 11, wherein at least one connecting tongue is constructed in one piece with the at least one contact plate.

14. Apparatus according to one of claims 10 or 11, wherein an end of the at least one insulating frame opposite to the fastening area between the at least one contact plate and the at least one insulating frame is formed as a clip raised out of a plane thereof and engageable over the end of the at least one contact plate opposite to the fastening area.

15. Apparatus according to one of claims 10 or 11, wherein the at least one contact plate is free between end regions thereof.

16. Apparatus according to one of claims 10 or 11, wherein the at least one contact plate is made from flexible sheet metal.

17. Apparatus according to one of claims 10 or 11, wherein the at least one contact plate is bent in a convex manner with respect to the at least one frame and pretensioned.

18. Apparatus according to one of claims 10 or 11, wherein cam means extending out of a plane of the at least one frame are provided in a vicinity of the fastening area on a side of the at least one frame facing the at least one contact plate are provided cams.

19. Apparatus according to one of claims 1 or 10, wherein the at least one includes transverse webs.

20. Apparatus according to one of claims 1 or 2, wherein at least two PTC components are arranged between the at least one insulating support and the lamellas, and wherein cover plates are provided corresponding in number corresponds to a number of the PTO components and having a shape adapted thereto.

21. Apparatus according to one of claims 1 or 2, wherein at least two PTC components are provided , and wherein the at least one insulating support comprises insulating parts corresponding in number to a number of the PTC components and whose having a shape adapted thereto.

22. Apparatus according to one of claims 1 or 2, wherein at least two PTC components are provided, and wherein the at least one contact plate comprises parts corresponding in number to a number of the PTC components and adapted to the shape thereof.