GB2465457A

GB2465457A - Condensate collection container

Info

Publication number: GB2465457A
Application number: GB0918849A
Authority: GB
Inventors: Thomas-Marten Koetke; Marcus Erfert
Original assignee: KUNSTSTOFFVERARBEITUNG KOETKE GmbH
Current assignee: KUNSTSTOFFVERARBEITUNG KOETKE GmbH
Priority date: 2008-11-20
Filing date: 2009-10-27
Publication date: 2010-05-26
Anticipated expiration: 2029-10-27
Also published as: GB2465457B; GB0918849D0; DE202008015411U1

Abstract

A condensate collection container 1, made of thermoplastic material, is provided for a condensing heating boiler. The condensate collection container comprises a seal-water siphon 20 which is connected via an overflow 35 with a chamber 60 of a surge-water siphon 50, from which originates a reversed U-shaped discharge line 70 whose highest point 72 lies lower than the overflow from the seal-water siphon to the surge-water siphon. At least the surge-water siphon and its discharge line are combined in an integral blow-moulded part. The integral blow-moulded part may also comprise the seal-water siphon. Preferably, the discharge side of the U-shaped discharge line communicates with the chamber of the surge-water siphon via a vent line 80 integrated into the blow-moulded part. The seal-water siphon may further comprise an integrally formed valve seat (31, fig.2e) for a valve ball (40, fig.2e) at a level beneath the overflow to the chamber of the surge-water siphon.

Description

A condensate collection container The invention relates to a condensate collection container made of a thermoplastic material for a condensing heating boiler. The condensate collection container comprises a seal-water siphon which is connected via an overflow with a chamber of a surge-flow siphon. A reversed U-shaped discharge line originates from the chamber. The highest point of the discharge line lies lower than the overflow from the seal-water siphon to the surge-flow siphon.

Condensate is obtained in the combustion chamber during the combustion of gas or other fuels in condensing heating boilers, which is substantially water. This condensate needs to be collected and discharged from the combustion chamber. This usually occurs by a discharge in the floor of the combustion chamber. No other combustion products, especially no exhaust gas, must escape from this discharge. They must be discharged via a chimney. That is why a condensate collection container with at least one seal-water siphon is disposed beneath the discharge. Since the condensate which is obtained drop by drop needs to be discharged by means of a surge flow in a number of countries such as Great Britain, the seal-water siphon is provided downstream with a surge-water siphon. A surge-water siphon usually comprises a chamber with an upwardly disposed inlet and a downwardly disposed discharge, from which a reversed U-shaped discharge line branches whose highest point is disposed lower than the inlet. The end of the U-shaped discharge line preferably lies beneath the discharge. In this way, such an amount of condensate is collected in the chamber until the condensate reaches the highest point of the U-shaped discharge line and runs off via the downwardly facing leg of the discharge pipe.

Condensate is pulled up via the rising leg of the discharge pipe until the rising leg of the discharge leg will draw air, which means that the condensate will run off from the chamber in surges via the U-shaped discharge line.

Such surge-water siphons come with the disadvantage that the production is expensive and the necessary connection of the individual components is unreliable and does not remain permanently tight.

The invention is based on the object of providing an improved condensate collection container for a condensing heating boiler.

This object is achieved by a condensate collection container according to claim 1.

The condensate collection container is made of thermoplastic material and comprises a seal-water siphon whose overflow is connected with a chamber of a surge-water siphon. A reversed U-shaped discharge line originates from the chamber whose highest point lies lower than the overflow from the seal-water siphon to the surge- water siphon. The surge-water siphon is an integral blow- molded part, including its discharge line. Such a surge- water siphon can be produced in one single pass, a so-called "shot". This reduces costs. The risk of failure will decrease because gluing and welding of the component can be omitted.

Preferably, the integral blow-molded part also comprises the seal-water siphon. Further reductions in costs can thus be achieved.

The discharge side of the U-shaped discharge line communicates with the chamber of the surge-water siphon preferably via a vent line integrated in the blow-molded part. It is thus prevented that during the discharge of the surge-water siphon which occurs in surges that seal water from the seal-water siphon is drawn in. The blocking function of the seal-water siphon is maintained.

The seal-water siphon may comprise an integrally formed valve seat for a valve ball at a level beneath the overflow to the chamber of the surge-water siphon. After mounting a condensing heating boiler, the seal-water siphon of the condensate collection container had to be filled previously with seal water prior to start-up in order to prevent the escape of exhaust gasses through the discharge in the floor of the combustion chamber.

Moreover, the function of the exhaust gas guidance can only be checked when the seal-water siphon is filled. If the seal-water siphon has an integral valve seat for a valve ball as proposed however, the valve ball will close off the discharge of the combustion chamber or the inlet of the seal-water siphon and/or the surge-water siphon. As a consequence, it is consequently excluded even when the seal-water siphon is not filled that exhaust gases will escape via the condensate collection container. When condensate is produced during the operation of the condensing heating boiler, it will collect at first at the valve seat until the valve ball will float. The collected condensate will then flow off through the valve seat and the valve ball will then seal the valve seat again. This will be repeated until the valve ball will float permanently. Sufficient condensate is then present in the seal-water siphon in order to ensure a sufficient blocking effect.

Two embodiments are described in a schematic simplified and exemplary manner by reference to the drawings, wherein: Fig. la shows an isometric view of a surge-water siphon; Fig. lb shows a side view of the surge-water siphon of Fig. la; Fig. ic shows a side view which is complementary to Fig. lb; Fig. id shows a horizontal sectional view along the plane B-B in Fig. ic; Fig. le shows a longitudinal sectional view along plane A-A in Fig. ic; Fig. 2a shows an isometric view of a condensate collection container; Fig. 2b shows a side view of the condensate collection container of Fig. 2a; Fig. 2c shows a horizontal sectional view along the plane B-B in Fig. 2b; Fig. 2d shows a longitudinal sectional view along the plane A-A in Fig. 2c; Fig. 2e shows a cross-sectional view along the plane C-C in Fig. 2b.

Figs. la to le show a surge-water siphon 50 which is arranged as an integral blow-molded part and comprises an inlet 11 arranged as a nozzle. The nozzle can be connected to an overflow of a conventional seal-water siphon. The condensate flows from there to a chamber 60 (see especially Figs. lc and le), from the bottom end of which a reversed U-shaped discharge line 70 originates with a rising leg 71 and a falling leg 73. The falling leg 73 opens into a discharge nozzle 78. A vent line 80 connects the discharge nozzle 78 with the upper region of chamber 60. When the chamber 60 is filled by incoming condensate of a condensing heating boiler for example to such an extent that the rising leg 71 of the discharge line is filled completely, i.e. up to bend 72, it flows off via the falling leg 73, with condensate being drawn from the chamber 60 via the discharge tube 70 for such a time until the rising leg 71 will draw air. While the condensate discharges from the chamber 60, air flows from the region of the discharge nozzle 78 into the chamber via the vent line 80, so that no (noteworthy) negative pressure is produced in the chamber.

The condensate collection container 1 in Figs. 2a to 2e comprises a condensate discharge of a combustion chamber of a condensing heating boiler. The condensate reaches an inlet container 30 through inlet 21, which container is connected at its bottom end via an opening 32 with a rising conduit 33. The inlet container 30 and the rising conduit 33 jointly form a seal-water siphon 20 (cf. especially Fig. 2b and Fig. 2c) . An overflow 35 into a chamber 60 of a surge-water siphon 50 is arranged at the upper end of the conduit 33. A reversed U-shaped discharge line 70 with a rising leg 71 and a falling leg 73 originates from the floor of chamber 60. The falling leg 73 opens into an expanded discharge nozzle 78 for connection to a sewage system. The discharge nozzle 78, which means the discharge side of the discharge line 70, communicates with a chamber 60 via a vent line 80.

The inlet container 30 comprises a constriction 31 at half the height, which constriction is arranged as a valve seat and is sealed by a floating valve ball 40 (cf. Fig. 2d and Fig. 2e).

When a condensing heating boiler (not shown) is mounted with condensate collection container 1, exhaust gases can reach through inlet 21 to the upper part of the inlet container 30, which means the region above the valve seat 31, but the path of the exhaust gases through the condensate collection container to the discharge nozzle 78 is blocked by the ball 40 sealing the valve seat 30.

Condensate is only obtained during the operation of the condensing heating boiler which will slowly fill the region above the valve seat 31 until the valve ball 40 will float. The condensate now runs into the bottom region of the inlet container 30, i.e. the region beneath the valve seat 31, until the valve ball seals the valve seat again. This process will be repeated until the valve ball will float permanently. The function of the seal-water siphon 20 is already ensured at this point in time because the condensate level in the conduit 33 and the inlet container 40 stands at least slightly above the valve seat 31, which means that no exhaust gases can escape through opening 32 of the inlet container 30 via the conduit 33 to the chamber 60 because the opening 32 is filled with condensate. During further operation of the condensing heating boiler, the condensate level rises up to the upper end of conduit 33 which is arranged as an overflow 35 to the chamber 60 of the surge-water siphon 50. The condensate level gradually rises in chamber 60 and the rising leg 71 of the U-shaped discharge line 70 until the condensate reaches the bend 72 of the discharge line 70 which marks the highest point. The condensate now runs off via the falling leg 73 of the U-shaped discharge line 70 until the rising leg 71 draws air. While the condensate flows off from the chamber 60, air is drawn into the chamber 70 through the vent line 80, so that no condensate is sucked from the seal-water siphon 20 into chamber 60.

As can clearly be seen by reference to Figs. 2a and 2b, the entire condensate collection container 1 is arranged integrally as a blow-molded part.

Claims

CLAIMS: 1. A condensate collection container (1) made of thermoplastic material for a condensing heating boiler, comprising a seal-water siphon (20) which is connected via an overflow (35) with a chamber (60) of a surge-water siphon (50), from which originates a reversed U-shaped discharge line (70) whose highest point (72) lies lower than the overflow (35) from the seal-water siphon (20) to the surge-water siphon (50), characterized in that at least the surge-water siphon (50) and its discharge line (70) are combined in an integral blow-molded part.
2. A condensate collection container (1) according to claim 1, characterized in that the integral blow-molded part also comprises the seal-water siphon (20).
3. A condensate collection container according to claim 1 or 2, characterized in that the discharge side of the U-shaped discharge line (70) communicates with the chamber (60) of the surge-water siphon (50) via a vent line (80) integrated in the blow-molded part.
4. A condensate collection container (1) according to one of the claims 1 to 3, characterized in that the seal-water siphon (20) comprises an integrally formed valve seat (31) for a valve ball (40) at a level beneath the overflow (35) to the chamber (60) of the surge-water siphon (50).
5. A condensate collection container, substantially as hereinbefore described with reference to the accompanying drawings.