HEAT EXCHANGER FOR A HIGH EFFICIENCY HOT AIR HEATING APPLIANCE AND HEATING APPLIANCE EQUIPPED THEREWITH

• US 20130014740A1
• Filed: 07/10/2012
• Published: 01/17/2013
• Est. Priority Date: 07/11/2011
• Status: Active Grant

• Current Assignee: Multicalor Industries, Naamloze Vennootschap
• Original Assignee: Multicalor Industries, Naamloze Vennootschap
• Inventors: TOLLENEER, Steven, VERBERCK, Marcel Franciscus J.
• Granted Patent: US 8,733,337 B2
• Time in Patent Office: Days
• US Class Current: 126/110.R
• CPC Class Codes: F24D 2220/06 Heat exchangers
• CPC Class Codes: F24H 3/087 using fluid fuel
• CPC Class Codes: F24H 3/105 using fluid fuel
• 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: F28D 9/0056 with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
• CPC Class Codes: F28F 3/12 Elements constructed in the shape of a hollow panel, e.g. with channels F28D1/02, F28D1/03 take precedence
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

Heat exchanger for a high efficiency hot air heating appliance (1), with at least one segment (5) and with a primary section (14) and, viewed in the flow direction (A), followed by a secondary condensing section (15), whereby the segment (5) consists of at least one primary element (16) and at least two secondary condensing elements (19), that form part of the secondary condensing section (15) of the segment (5), and the inputs (20) of each of them are connected in parallel to the output (18) of the primary element (16) in such a way that the gas flow coming from the primary element (16) is divided over the secondary condensing elements (19) connected to it.

Claims

1-A. -A heat exchanger for a high efficiency hot air heating appliance, comprising:

at least one segment that forms a flow channel with an inlet and an outlet for hot combustion gases and with a primary section and a secondary condensing section following in the flow direction of the combustion gases, said segment comprising at least one primary element with an input and an output forming part of the primary section of the segment and at least two secondary condensing elements, each with an input and output, that form part of the secondary condensing section of the segment, at least one primary element being constructed as an integrated part of a double element that also includes a secondary condensing element in addition to the primary element,

a branch opening at the location of a transition between the primary element and the secondary condensing element of the double element, and to which the inputs of the other secondary condensing elements of the segment are connected in parallel in such a way that the gas flow coming from the primary element is divided over the secondary condensing elements connected to it, and

flow channels for the air to be heated disposed between the secondary condensing elements.

2-The. -The Heat exchanger according to claim 1, wherein the elements are constructed in sheet form and the secondary condensing elements are connected together in the manner of a sandwich structure.

3-The. -The heat exchanger according to claim 1, wherein the inputs of the primary elements are connected to said inlet and the outputs of the secondary condensing elements are connected to the outlet.

4-The. -The heat exchanger according to claim 1, wherein the secondary condensing elements are formed as a two-walled whole that comprise two preformed shells that are affixed together to form a flow channel with said input and output.

5-The. -The heat exchanger according to claim 1, wherein the double element is formed as a two-walled whole from two preformed shells that are affixed together to form a flow channel with an input for the primary element;

an output for the secondary condensing element, and, a branch opening at the location of the transition between the primary element and the secondary condensing element that constitutes an output of the primary element and an input for the secondary condensing element, and to which the inputs of the other secondary condensing elements are connected in parallel.

6-The. -The heat exchanger according to claim 4, wherein the two-walled elements are connected together along edges thereof, except at the location of the inputs and outputs, by a gastight connection.

7-The. -The heat exchanger according to claim 1, wherein the secondary condensing elements have the same shape, including two opposite essentially straight edges that border the flow channel and which extend up to the output of the respective secondary condensing element.

8-The. -The heat exchanger according to claim 7, wherein the opposite edges diverge towards the output.

9-The. -The heat exchanger according to claim 7, wherein the flow channel in the secondary condensing elements contain a section that extends according to an essentially zigzag-shaped route between the opposite edges.

10-The. -The heat exchanger according to claim 9, wherein the flow channel in the secondary condensing elements contains a section that connects the zigzag-shaped channel section to the input of the respective secondary condensing element.

11-The. -The heat exchanger according to claim 9, wherein the zigzag route in the secondary condensing elements divides into a number of part channels that converge in the secondary condensing element to be able to enable their being selectively divided.

12-The. -The heat exchanger according to claim 11, wherein the zigzag route at the output of the secondary condensing element is divided into a number of part channels, each part channel including a part output separated by a welded joint of the edges of the shells at the output of the respective condensing element.

13-The. -The heat exchanger according to claim 7, wherein the secondary condensing elements comprise at least two drainage channels or grooves enabling removal of condensation, said drainage channels essentially extending along the opposite edges to the output of the respective condensing element.

14-The. -The heat exchanger according to claim 13, wherein the drainage channels mutually connect the branches of a zigzag route.

15-The. -The heat exchanger according to claim 5, wherein the double element is essentially U-shaped with two arms connected by a connection, with one arm forming part of the primary element and the other arm forming part of the secondary condensing element of the double element.

16-The. -The heat exchanger according to claim 1, wherein the elements are made of stainless steel.

17-The. -The heat exchanger according to claim 1, wherein the heat exchanger contains two or more of said at least one segment that are arranged next to one another.

18-A. -A high efficiency hot air heating appliance comprising a heat exchanger with an inlet and an outlet, a burner opposite the inlet and a fan to blow air over or around the heat exchanger, and the heat exchanger recited in claim 1.

19-The. -The high efficiency hot air heating appliance according to claim 18, wherein the burner is a burner that burns gaseous fuels.