Sectional Boiler

• US 20120055421A1
• Filed: 05/31/2010
• Published: 03/08/2012
• Est. Priority Date: 06/10/2009
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Rausch, Rainer
• Application Number:
  US13/318,942
• Publication Number:
  US 20120055421A1
• Time in Patent Office: Days
• US Class Current: 122/231
• CPC Class Codes: F24H 1/43 helically or spirally coiled
• CPC Class Codes: F24H 1/445 with integrated flue gas condenser
• CPC Class Codes: F24H 8/00 Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
• CPC Class Codes: F24H 9/0015 in water channels
• CPC Class Codes: F28D 2021/0024 for combustion apparatus, e.g. for boilers
• CPC Class Codes: F28D 7/005 the conduits for only one medium being tubes having bent portions or being assembled from bent tubes or being tubes having a toroidal configuration F28D7/0008, F28D7/02, F28D7/04, F28D7/06, F28D7/14 take precedence
• CPC Class Codes: F28D 7/024 the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
• CPC Class Codes: F28D 7/026 the conduits of only one medium being helically coiled and formed by bent members, e.g. plates, the coils having a cylindrical configuration
• CPC Class Codes: F28D 9/0012 the apparatus having an annular form
• CPC Class Codes: F28F 9/026 with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A sectional boiler is described as made of cast iron or aluminum, in particular a condensing boiler, having essential annular sections, a front section, at least one rear section and at least one center section being provided, which form a combustion chamber having an essentially surrounding heat exchanger made of a sectional block, whose annular water chambers are connected to one another and which has gap-like heating gas flues, which extend between two adjacent sections with a mutually adapted geometry approximately radially and empty into an exhaust gas collection chamber, and having a return port and a feed port. The present system is based on the objective of optimizing a sectional boiler made of cast iron or aluminum as a condensing boiler particularly with respect to compactness and robustness. The present system provides that the return port and the feed port are located on opposite sides of the sectional block, the flow passes through the water chambers of the sections in series starting from the return port, and the individual sections are respectively provided hydraulically with overflow openings in only one place on the periphery and are connected by these on at least one side with an adjacent section.

Claims

1-14. -14. (canceled)

15. A sectional boiler made of cast iron or aluminum, which is a condensing boiler, comprising:

essential annular sections, including;

a front section;

at least one rear section; and

at least one center section;

wherein the sections form a combustion chamber having an essentially surrounding heat exchanger made of one sectional block, whose annular water chambers are connected to one another, and which has gap-like heating gas flues, which extend between two adjacent sections with a mutually adapted geometry approximately radially and empty into an exhaust gas collection chamber, and having a return port and a feed port, and

wherein the return port and the feed port are located on opposite sides of the sectional block, the flow passes through water chambers of the sections in series starting from the return port, and the individual sections are respectively provided hydraulically with overflow openings in only one place on the periphery and are connected to these on at least one side by an adjacent section.

16. The sectional boiler of claim 15, wherein the overflow openings are provided as hydraulic connections into the respectively adjacent section, and wherein at least one flow guide arrangement is mounted in the water chamber respectively in the connection area within the overflow openings.

17. The sectional boiler of claim 15, wherein a flow guide arrangement in the connection area of the water chamber is made up of a wall that essentially divides the water chamber crosswise and is oriented approximately vertically to the axis of the connection area, which wall closes the respective flow channel and directs the incoming flow from the axial direction into the circumferential direction and directs the outgoing flow from the circumferential direction into the axial direction into the adjacent section.

18. The sectional boiler of claim 15, wherein a flow guide arrangement in the form of a wall dividing the water chamber crosswise and oriented approximately vertically to the axis of the connection area is situated aslant approximately at an angle of 30 to 50 degrees in the respective flow channel.

19. The sectional boiler of claim 15, wherein the return port, the feed port and the overflow openings are situated between two adjacent sections in alignment on an axis and the overflow openings exist only in one place on the periphery of the sections.

20. The sectional boiler of claim 15, wherein the heating gas flues are subdivided into a primary segment, formed by the front section and at least one center section, and a secondary segment, formed by at least two rear sections, the heating gas flues in the primary segment running approximately radially outward respectively starting from the combustion chamber and emptying into an exhaust gas collection chamber on the outside of the sections, the heating gases there flowing over into the secondary segment, and in the secondary segment at least one heating gas flue running from the exhaust gas collection chamber approximately radially inward to an exhaust gas connection.

21. The sectional boiler of claim 15, wherein the exhaust gas connection is situated on the common center axis of the sections and the combustion chamber.

22. The sectional boiler of claim 15, wherein, in the extension of the exhaust gas connection, the at least two rear sections have at least one opening, and the latter is closed within the rear section near the combustion chamber by a sealing plug on the heating gas side.

23. The sectional boiler of claim 15, wherein the at least two rear sections respectively have in the water chamber a separating wall, running on the axis of symmetry, situated offset by approximately 180 degrees with respect to the connection area, between the wall of the opening and the inner side of the outer bounding wall, which respectively divides the water chamber into two halves.

24. The sectional boiler of claim 15, wherein the at least two rear sections respectively have in the water chamber a symmetrically disposed wall, which runs around on a large part of a partial circle and is recessed in the area of the separating wall between the wall of the opening and the inner side of the outer bounding wall such that return water, starting from the upper return port in each rear section is directed downward by the flow guide arrangement first in one half outside of the partially circumferential wall, flows near the separating wall into the inner flow channel of a smaller diameter within the circumferential wall, passes around the opening, then flows upward on the other side of the separating wall again outside of the circumferential wall and passes over into the adjacent section in the connecting area on the backside of the flow guide arrangement.

25. The sectional boiler of claim 15, wherein the individual sections respectively have on the heating water side at least one separating wall running around in the circumferential direction and are divided into at least one inner flow channel near the combustion chamber and at least one outer flow channel of a greater diameter, the inner flow channel near the combustion chamber having a smaller cross section than the outer flow channel far from the combustion chamber, and the flow in each section passing first through the outer and afterwards through the inner flow channel.

26. The sectional boiler of claim 15, wherein in the front section in the area of the flow guide arrangement in the flow channels an overflow opening is situated in the separating wall running in the circumferential direction between the flow channels.

27. The sectional boiler of claim 25, wherein the flow guide arrangement are made up essentially of a wall standing vertically on the separating wall running in the circumferential direction, which closes the respective flow channel.

28. The sectional boiler of claim 25, wherein the respective flow guide arrangement are situated in the inner flow channel and the outer flow channel so that they cross each other.