GB2415033A - A flue turret elbow with a channel guiding condensation to a reservoir in a collector - Google Patents

Abstract

To capture condensation from a substantially horizontal flue 4, a flue turret elbow 1 has a channel 5 profiled into the inside of the elbow which guides condensation into a reservoir 6 in collector 7. The channel has no sharp edges to avoid condensate detaching from the wall and falling into the outlet 8 of condensing boiler. The collector 7 has a drainage point 9 leading to a drain of the boilers' condensing heat exchanger. The reservoir 6 is outside of the cross section of the flue to prevent restricting the flow of flue products. The collector 7 and elbow 1 may be metal or plastic with an EPDM rubber seal between them, and sit within a flue turret 2 forming an outer air duct 3. The flue can be fitted in any orientation to the boiler.

Description

241 5033 Horizontal Flue Condensate Capture Device The invention relates

to a device for use on a condensing boiler using a horizontal flue, were it is desirable to capture the condensate produced in the flue and prevent its entry into the boiler.

Although some devices are available for capturing condensate their designs are restrictive to the flow of flue products from the boiler. This has a detrimental effect on the performance of the boiler. Areas of performance that can be affected by the restriction include the maximum flue length that can be fitted to the boiler.

The object of this invention is to capture the condensate running back from the flue but without restricting the flow of flue products from the boiler.

Accordingly the device captures the condensate in a collection reservoir outside the cross section of the flue. The condensate is guided into this collection reservoir by means of a collection channel profiled into the inside of the flue turret elbow. These features are contained in the 2 major components known as 'flue condensate collector' and 'flue turret elbow.' The device is made of these 2 separate parts to allow installation of the flue after the boiler has been fitted to the wall. A seal is fitted between these 2 parts similar to the types used to connect additional flue lengths.

Preferably the flue condensate collector and flue turret elbow are made of a plastic or a metal, which is resistant to corrosion from the condensate and capable of running at flue gas temperatures. The seal between these components would typically be a rubber such as EPDM.

A preferred embodiment of the invention will now be described with reference to the accompanying drawing in which: FIGURE 1 shows a cross sectional view of the device fitted in a typical boiler application.

FIGURE 2 shows a detail close up of the engagement of the flue turret elbow and flue condensate collector form figure 1.

FIGURE 3 is an isometric view of the flue turret elbow in isolation.

FIGURE 4 is an isometric view of the flue condensate collector in isolation.

As shown in figure 1 the flue turret elbow 1 sits within the flue turret 2. Air for combustion Is drawn into the boiler through the outer air duct 3 whilst the products of combustion are passed back out of the boiler through the central flue duct 4. On condensing boilers the flue duct is angled such that the natural drainage route for any liquids is back towards the boiler. This is done deliberately to avoid the condensation that naturally forms in the flue from dripping out of the terminal and causing a nuisance. - 2

Condensate running back towards the boiler runs into the collection channel 5 and is guided into the collection reservoir 6 on the flue condensate collector 7, as shown in figures 1 & 2. The profile of the collection channel 5 is smooth with no sharp edges.

This is to avoid any rapid flow of condensate back from the flue detaching itself from the wall and hence falling in through the flue outlet of the boiler 8.

A drainage point 9 on the flue condensate collector carries the captured condensate to the boilers internal drain provided for the condensing heat exchanger.

A small web 10 inside the collection reservoir 6 of the flue condensate collector 7, as shown in figure 4, helps to control the engagement of the two major parts when assembled.

The flue turret 2 can be fitted in any orientation onto the boiler allowing complete flexibility in flue fitting options. - 3

Claims (4)

1. A condensate capture device, that guides condensate from a horizontal flue, down a collection channel, into a reservoir outside of the cross section of the flue, so that no restriction is put on the flow of flue products out of the boiler.

2. A condensate capture device that allows connection of the horizontal flue in any orientation.

3. A condensate capture device as claimed in any proceeding claims, which is made from plastic or metal, or from a combination of these.

4. A condensate collector substantially as herein described above and illustrated in the accompanying drawings.