EP1074808A2

EP1074808A2 - Block manifold for heat exchanger battery fan coils

Info

Publication number: EP1074808A2
Application number: EP00830500A
Authority: EP
Inventors: Ermiro A. Palmiri; Alan Gilberti
Original assignee: Tiemme Raccorderie SpA
Current assignee: Aermec SpA
Priority date: 1999-08-02
Filing date: 2000-07-17
Publication date: 2001-02-07
Anticipated expiration: 2020-07-17
Also published as: ITBS990076V0; EP1074808B1; DE60023805D1; EP1074808A3; EP1553378A2; IT247373Y1; ATE309515T1; ITBS990076U1

Abstract

The finding concerns a block manifold for heat exchanger battery fan coils. Its body has a fitting (12) with a fluid pipe for connection to a heat exchanger battery, two three or more branches (13) for connection to the pipes of the heat exchanger battery and an intermediate distribution chamber (14) to connect the fitting (12) up with the branches (13). This said intermediate chamber (14) is circular, completely closed all round and is coaxial with the said union part (12).

Description

This invention concerns a block manifold for fitting to heat exchanger batteries and especially for fan coils.
In fan coils the heat exchanger batteries have fluid circulation pipes the ends of which are connected to manifolds through which the fluid flow and return pipes are connected. Usually the manifolds have a block body with a part fitting to fluid piping, two, three or more branches for connection to the battery pipes and a distribution chamber between the fitting and the said branches. Generally, this cylinder is cylindrical and its geometric axis is oriented transversally to the axes of the fitting and the branches which are substantially parallel to each other.
By its presence and conformation, this chamber is already a cause of turbulence in the fluid and a loss of pressure in the system and contributes to pointlessly increasing the external dimensions of the manifold.
Moreover, due to shape and machining requirements inside the body, this intermediate cylindrical chamber is left open at one end and is only closed, with a plug, generally welded on, at the end of machining. This plug represents a critical part of the manifold.
At the same time, inserting and fixing this plug requires additional production work time and costs. Furthermore, if the welding is not homogenous it becomes a source of rejection because in this case the manifold cannot be used.
Starting from this introduction, the purpose of this invention is to create and supply a manifold for heat exchanger batteries which is new and original in conformation, capable of providing diverse advantages over manifolds of known technical merit in construction, economical and functional terms.
This aim has been reached by a manifold for the use cited above which includes a block body: here, the distribution chamber, located between the fitting and branch parts is coaxial to the fitting and on a parallel axis to the said branches.
In other words, all the parts of the manifold are oriented in parallel to each other in the same direction. This allows a reduction in the external dimensions of the body, while maintaining the technical characteristics required for its use and a reduction in the raw materials used to make it. Furthermore, the internal machining of the body to provide communication between the fitting and the branches can be performed by passing axially from the fitting without the need for lateral openings. The insertion and welding of a plug is thus eliminated and consequently also the risk of rejects and some production costs. Also, and not least, the intermediate chamber with its axis parallel to the fitting and the branches contributes to reducing if not completely eliminating, the turbulence in the fluid and the pressure losses in the supplied system.
The drawings enclosed illustrate an example of how the manifold is created, which is described in more detail as follows:
Fig. 1 shows a perspective view;
Fig. 2 shows a side view;
Fig. 3 shows an end view of the fitting side;
Fig. 4 shows a side view of the branches;
Fig. 5 shows a section according to the V-V arrows in Fig. 3; and
Fig. 6 shows a cross-section of a part of the body according to the VI-VI arrows in Fig. 3.
The manifold is comprised of a block body, usually made of brass. The resulting body is obtained with normal forming techniques and then machined for the finish required.
This body, when finished, has a fitting 12 with an internal thread on one end and two, three or more branches on the opposite end 13; inside there is a distribution chamber 14 which connects the fitting 12 and the branches 13.
The fitting 12 has a geometric axis X; the branches 13 are in parallel Y axes to the X axis of the union part.
As regards the internal chamber 14, this is circular and completely closed all round, coaxial with the fitting and with a radius broad enough to intersect the branches. All this to achieve the purpose and advantages described above.
In the body, on the sides of the fitting 12 seats for plug pins 15 have been made.
It is anyway evident that all the machining on the body and especially on the intermediate chamber can be performed on the same line or in parallel to the axis of the fitting, greatly simplifying the machining process.

Claims

A block manifold for fan coil battery heat exchangers, including a one piece body with a fitting (12) on one side with fluid piping for connection to a heat exchanger battery and one, two or more branches (13) on the other side for connection to the heat exchange battery and an intermediate distribution chamber (14) to connect said fitting (12) with the said branches (13), characterised by the fact that the intermediate chamber (14) is circular, perfectly closed around the outside and coaxial to the fitting (12).
A block manifold according to claim 1 in which the said fitting (12) is on a geometric axis, the said branches are on parallel axes to the fitting and the intermediate chamber is coaxial to the fitting and intersects all the branches.