EP1972863A2

EP1972863A2 - Heat exchanger

Info

Publication number: EP1972863A2
Application number: EP08152231A
Authority: EP
Inventors: Antoni Jaworski
Original assignee: JAWORSKA TERESA
Priority date: 2007-03-06
Filing date: 2008-03-04
Publication date: 2008-09-24
Also published as: EP1972863A3

Abstract

An object of the present invention is a heat exchanger for warming up liquids, and more particularly in central heating installations, enclosing an assembly of elements being hermetically connected and inside of which the warmed up liquid flows through. Those elements are placed in a cylindrical jacket, wherein the assembly being provided with liquid inlet and outlet elements, consists of a series of circular ring shaped cylindrical elements being vertically and concentrically positioned, forming the ring shaped spaces being closed in the top and in the bottom, used for the flow of the warmed up liquid. The cylindrical elements are placed in certain distances from each other to form ring shaped gaps for the flow of heat exchange medium, and more particularly the combustion gas, and all closed inner spaces of the ring shaped cylindrical elements are connected with each other in the bottom and top by means of connector pipes. According to the present invention, the outer ring shaped cylindrical element (2) forming a heat exchanger jacket is longer than the other elements and is covered from the top with a double-walled head, consisting of walls (15, 16), which forms a stabilizing outlet container (17), wherein there is an inlet connection (14) in the bottom of the outer ring shaped cylindrical element (2), and an outlet connection (18) is to be found in the top thereof. The connector pipes (4, 4') as placed in the bottom and top of the cylindrical elements (2) are radially arranged in a cross-shaped arrangement.

Description

An object of the present invention is a heat exchanger for warming up liquids, and more particularly in central heating installations.
The description DE 19517633 A1 presents a construction of a cooling installation used in air cooling systems in abyssal mines. That installation is enclosed in air pressure conduits and cooling medium conduits. The inlet unit of installation according to that solution consists of many double-walled cooling cylinders, being positioned concentrically towards each other. Between those cylinders are formed ring shaped inlet channels. The inlet unit of the installation is coaxially connected with the outlet unit in form of a nozzle, being connected with the air pressure pipe that is centrally positioned.
The description JP 01075891 A discloses a construction of a heat exchanger which is designed for warming up and condensation of steam of heavy body liquids. The casing of that exchanger is cylindrical and inside that casing are placed double-walled cylinders having different diameters and being positioned concentrically towards each other and towards the casing. Between the casing and the outer cylinder, as well as between the respective cylinders, the ring shaped spaces exist, the width of which is pre-determinated.
An object of the present invention is a heat exchanger for warming up liquids, and more particularly in central heating installations, comprising an assembly of elements being hermetically connected - inside of which the warmed up liquid flows through, and positioned in a cylindrical jacket. That assembly being provided with the liquid inlet and outlet elements consists of a series of circular ring shaped cylindrical elements being vertically and concentrically positioned, forming the ring shaped spaces being closed in the top and in the bottom, used for the flow of the warmed up liquid. The cylindrical elements are placed in certain distances from each other to form ring shaped gaps for the flow of heat exchange medium, and more particularly the combustion gas, and all closed inner spaces of the ring shaped cylindrical elements are connected with each other by means of connector pipes.
The gist of the present invention consists in that the outer ring shaped cylindrical element, forming a heat exchanger jacket, is longer than the other elements and from the top is covered with a double-walled head which forms a stabilizing outlet container, wherein there is an inlet connection in the bottom of the outer ring shaped cylindrical element, and an outlet connection is to be found in the top thereof. The connector pipes, as placed in the bottom and top of the cylindrical elements are radially arranged in a cross-shaped arrangement.
Advantageously, in the lower part of the exchanger the outer ring shaped cylindrical element surrounds the cylindrical combustion chamber provided with a burner, above which the central guide apparatus of combustion gas is mounted.
According to the present invention, all the heat exchanging surfaces of the proposed heat exchanger are cylindrical shaped, which is very advantageous because of the fact that such construction is resistant to deformation, due to the effect of the liquid pressure and enables the use of a small sheet gauge.
The use of the proposed exchanger for the central heating installation boiler ensures a heavy thermal efficiency which enables a limitation of the combusted fuel quantity.
It is possible to use solid, liquid or gas fuels, and more particularly the ecological fuels, such as for example biomass, in the central heating installation boilers being according to the present invention provided with the heat exchangers.
The object of the present invention is presented by way of embodiments, with reference to the accompanying drawing, in which:

Figure 1 shows a longitudinal section of the heat exchanger according to the present invention, with respect to the first embodiment;
Figure 2 shows a cross-section of the heat exchanger along the line A-A as in Figure 1;
Figure 3 shows a longitudinal section of the heat exchanger according to the present invention, with respect to the second embodiment;
Figure 4 shows a cross-section of the heat exchanger along the line A-A as in Figure 3.

The below presented and described embodiments of the present invention refer to the use of a heat exchanger in central heating installation boilers.
As it has been shown in Figure 1, the heat exchanger according to the present invention comprises an assembly 1 constituting a system of the warmed up water flow. The assembly 1 consists of a series of ring shaped cylindrical elements 2 having different diameters. Each of the ring shaped cylindrical elements 2 is constructed of two cylindrical walls being concentrically inserted one into another, wherein the ring shaped space between the cylindrical walls is hermetic closed from the bottom and from the top by means of the rings 3, 3'. The respective ring shaped cylindrical elements 2 are vertically and concentrically placed in the heat exchanger in a certain distance from each other. In such a way come into being ring shaped gaps 5 used for the flow of combustion gas from the burner 6 being placed under the assembly 1. All inner spaces of the ring shaped cylindrical elements 2 are connected by means of connector pipes 4, 4', being placed in the bottom and in the top of each ring shaped cylindrical element 2. In that embodiment, the connector pipes 4 form a tubular cross in the middle part of the assembly 1, which is evident in particular from Figure 2 of the enclosed drawing. In the lower part of the assembly 1 a water supply pipe 10 is affixed to the connector pipe 4, forming a tubular cross, while in the upper part of the assembly the water outlet pipe 11 is affixed to the connector pipe 4'.
In accordance with the present invention, the heat exchanger shows a cylindrical casing 8 which encloses the assembly 1 and a combustion chamber 7, wherein the casing 8 shows a combustion gas outlet 9 in its upper part. In the bottom of the combustion chamber a burner 6 or another heat source is mounted, above which a central guide apparatus of combustion gas 12 is placed, which enables distribution of regular combustion gas streams flowing to the respective ring shaped gaps 5.
Between the respective ring shaped cylindrical elements 2, all along the entire height thereof, spacing ribs 13 are placed which reinforce and stabilize the whole assembly 1. Those ribs are V-shaped in the cross-section and they also cause stabilization of the flow of combustion gas.
Another embodiment of the heat exchanger according to the present invention has been shown in Figures 3 and 4. To all elements being common for both embodiments refer the same marking numerals.
For that solution has been used the assembly 1 enclosing a series of ring shaped cylindrical elements 2 being concentrically positioned, similar as it is in case of the above described heat exchanger. Compared with the other elements, the outer ring shaped cylindrical element 2 forming the outer casing 8' of the heat exchanger is downwardly extended and it surrounds the combustion chamber 7 and the burner 6, being placed in the bottom thereof. In the upper part of the heat exchanger, the outer casing 8' is covered with a double-walled head - walls 15 and 16; between those walls is formed a stabilizing outlet container 17. The supply water inlet is by means of connection 14 placed in the lower part of the exchanger, and the outlet is by means of connection 18 placed in the upper part of the heat exchanger according to the present invention. The combustion gas outlet pipe 19 is carried through the walls 15 and 16 at the side of the exchanger head. The outer surface of the heat exchanger is covered with an insulation layer and a metal housing.
Water flowing to the heat exchanger by means of the connection 14 flows through connections 4' to all cylindrical elements 2 and flows out through the stabilizing outlet container 17 and connection 18.

Claims

A heat exchanger for warming up liquids, and more particularly in central heating installations enclosing an assembly of elements being hermetically connected and inside of which the warmed up liquid flows through, being placed in a cylindrical jacket, wherein the assembly being provided with a liquid inlet and outlet elements consists of a series of circular ring shaped cylindrical elements being vertically and concentrically positioned, forming the ring shaped spaces being closed in the top and in the bottom, used for the flow of the warmed up liquid, wherein the cylindrical elements are placed in certain distances from each other to form ring shaped gaps for the flow of heat exchange medium, and more particularly the combustion gas, and all closed inner spaces of the ring shaped cylindrical elements are connected with each other by means of connector pipes, characterized in that the outer ring shaped cylindrical element (2) forming a heat exchanger jacket is longer than the other elements and is covered from the top with a double-walled head, consisting of walls (15, 16) and forming a stabilizing outlet container (17), wherein there is an inlet connection (14) in the bottom of the outer ring shaped cylindrical element (2), and an outlet connection (18) is to be found in the top thereof, and furthermore the connector pipes (4, 4') as placed in the bottom and top of the cylindrical elements (2) are radially arranged in a cross-shaped arrangement.
A heat exchanger as claimed in claim 1, characterized in that the outer ring shaped cylindrical element (2) surrounds in the lower part the combustion chamber (7) being provided with a burner (6).
A heat exchanger as claimed in claim 2, characterized in that the central guide apparatus of combustion gas (12) is mounted above the burner (6).