EP0700501B1 - Connection fitting for connecting radiators to their heat source in the heating circuit of a building heating installation - Google Patents

Abstract

A connection fitting (20) is disclosed for connecting radiators (12, 13, 14, 15) in a heating circuit of a building heating installation to their hot water boiler. The radiators are mounted between a flow pipe and a return pipe connection of the boiler and are in turn provided each with a flow pipe and a return pipe connection through which the hot water at the supply temperature is led into the radiator or returned to the boiler. A flow regulating valve (74) designed as a 4/3-way valve may be switched between a first throughflow position (I) and a second throughflow position (II) complementary to the first, through a stopping position (0). In the first throughflow position (I), a connecting sleeve (34 or 36) of the connection fitting (20) fixed to the flow pipe connection (16) of the radiator (12, 13, 14, 15) is connected to a supply pipe connecting sleeve (42, 44) of the connection fitting (20) and a connecting sleeve (36, 34) of the connection fitting (20) fixed to the return pipe connection (17) of the radiator is connected to its return pipe connecting sleeve (43, 46; 82). The 4/3 way valve (74) is designed as a proportional valve.

Description

The invention relates to a connection fitting for the connection of radiators in a heating circuit of a building heating system at their heat source, with several Radiator between a flow and a return connection e.g. trained as a hot water boiler are switched and with the others, in the preamble of claim 1, generic Characteristics.

Such a connection fitting is through the US-PS 4,129,149. This connection fitting is for radiators thought where the flow connections and the return ports are arranged coaxially, i.e. for a very special type of radiator that Connection area of a technically complex design requirement. The design of the is also technically complex known connection fitting insofar as for setting the flow cross-sections of their flow and return flow paths and the necessary ones Barrier, these individually assigned and individually operated throttle valves are provided.

There is also the fact that statistically not completely avoidable Mismanagement to correct the installation is complex and correspondingly expensive.

The object of the invention is therefore a connection fitting of the type mentioned at the outset to improve that they're for both a left-sided as well for a right-hand connection of the supply lines is suitable on the radiator and also in one and same configuration can be used if the direction the hot water supply and discharge is reversed.

This object is characterized by the in the Part of claim 1 mentioned features solved, resulting in every connection possibility, regardless of the direction of flow of the heat transfer medium given is.

A 4/3-way valve provided according to the invention, in its alternative flow function positions as it were complementary guides of the heat transfer medium are possible is in simple design as Rotary slide valve designed to be easy to manufacture is accessible.

In the indicated by the features of claim 3 The design of the connection fitting is in particular to implement a heating circuit according to the so-called Tichelmann system suitable, in which a flow line and a return line is provided by those in hydraulic parallel circuit the supply circuits branched off for the individual radiators are.

In the indicated by the features of claim 4 The design of the connection fitting is in particular suitable for realizing a one-pipe system, at which the connection fittings of various radiators of Heating circuit one after the other, as it were in hydraulic Series connection, through which a main current flows are, from which the partial streams branched off be necessary for heating the individual radiators are.

In combination with this is due to the features of the claim 5 a particularly simple and effective design a throttle device specified for the It is necessary to branch off the radiator supply currents is.

The indicated by the features of claim 6, The "symmetrical" design of the connection fitting has the Advantage that, regardless of the direction of flow each has the same throttling effect.

If, as provided according to claim 7, the 4/3-way valve the connection fitting an electrically controllable Drive has suitable flow cross sections controlled by an electronic control unit be the the required control signals Measured actual temperature values and can be entered Setpoints generated.

In the indicated by the features of claim 8 Design, the connection fitting can be installed under plaster without disturbing floor connections visible are. The connection fitting can also be used in the respective Radiator integrated functional unit be what the manufacturing advantage of offers as it were factory installation.

Fig. 1

einen Heizkreislauf einer Gebäudeheizanlage, bei dem zum Anschluß der Heizkörper an eine Vorlaufleitung und an eine Rücklaufleitung vorgesehene Anschlußarmaturen Abschnitte dieser Leitungen bildende Durchflußkanäle sowie je ein 4/3-Wege-Ventil umfassen über das die Durchflußkanäle in alternativen Stromführungen an die Heizkörper anschließbar sind, in schematisch vereinfachter Blockschaltbild-Darstellung;

Fig. 2

die Anschlußarmatur gemäß Fig. 1 in einem Schnitt längst einer die zentralen Achsen ihrer Durchflußkanäle enthaltenden Ebene;

Fig. 3

die Anschlußarmatur gemäß Fig. 2 in Draufsicht;

Fig. 4a bis 4e

verschiedene Funktionsstellungen des 4/3-Wege-Ventils der Anschlußarmaturen gemäß den Fig. 2 und 3, in einer der Fig. 2 entsprechenden Schnittdarstellung;

Fig. 5

einen Heizkreislauf, bei dem die Anschlußarmaturen der Heizkörper untereinander jeweils durch nur eine Rohrleitung verbunden sind;

Fig. 6a bis 6c

verschiedenen Funktionszuständen der bei dem Heizkreislauf gemäß Fig. 5 einsetzbaren Anschlußarmaturen entsprechende Schnittdarstellungen der Anschlußarmaturen;

Fig. 7

eine Ansicht einer im Rahmen des Heizkreislaufes gemäß Fig. 1 einsetzbaren Anschlußarmatur;

Fig. 8

eine Ansicht einer im Rahmen des Heizkreislaufs gemäß Fig. 5 einsetzbaren Anschlußarmatur mit nach unten weisenden Versorgungs-Anschlußstutzen und rechtwinklig dazu verlaufenden Steuer-Anschlußstutzen;

Fig. 9a bis 9c

ein weiteres Ausführungsbeispiel einer in einem Heizkreislauf gemäß Fig. 5 einsetzbaren Anschlußarmatur in den Fig. 6a bis 6c entsprechenden Funktionsdarstellungen;

Fig. 10a

eine perspektivische Ansicht des Ventilkükens der Anschlußarmatur gemäß den Fig. 9a bis 9c und

Fig. 10b

das Ventilküken gemäß Fig. 10a im Schnitt längs der Schnittebene der Fig. 6a bis 6c.

The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawing in structural and functional details. Show it:

Fig. 1

a heating circuit of a building heating system, in which connection fittings provided for connecting the radiators to a flow line and to a return line comprise flow channels forming sections of these lines as well as a 4/3-way valve via which the flow channels can be connected to the radiators in alternative current routings, in schematically simplified block diagram representation;

Fig. 2

the connection fitting of Figure 1 in a section along a plane containing the central axes of their flow channels.

Fig. 3

the connection fitting of Figure 2 in plan view.

4a to 4e

different functional positions of the 4/3-way valve of the connection fittings according to Figures 2 and 3, in a sectional view corresponding to Figure 2;

Fig. 5

a heating circuit in which the connection fittings of the radiators are connected to each other by only one pipe;

6a to 6c

different functional states of the connection fittings that can be used in the heating circuit according to FIG. 5 corresponding sectional representations of the connection fittings;

Fig. 7

a view of a fitting used in the heating circuit of FIG 1;

Fig. 8

5 is a view of a connection fitting which can be used in the context of the heating circuit according to FIG. 5 with a supply connection stub pointing downwards and a control connection stub running at right angles thereto;

9a to 9c

a further embodiment of a connection fitting usable in a heating circuit according to FIG. 5 in FIGS. 6a to 6c corresponding functional representations;

Fig. 10a

a perspective view of the valve plug of the connection fitting according to FIGS. 9a to 9c and

Fig. 10b

the valve plug according to Fig. 10a in section along the sectional plane of Fig. 6a to 6c.

In Fig. 1 is a total of 10 heating circuit a hot water heater not otherwise shown Building referred to, through this heating circuit 10 one of several residential units of the building is represented by the respective analog heating circuits are heated to a common Hot water boiler 11 are connected.

The heating circuit 10 includes the one chosen for explanation Embodiment 4 in total as a water-to-air heat exchanger trained radiators 12, 13, 14 and 15, each a flow connection 16 and a return connection 17, which can be seen in FIG. 1 Line connection with a flow line 18 and a return line 19 connected or connectable are.

To connect the radiators 12 to 15 to the flow line 18 and the return line 19 is one in total provided with 20 designated fitting, the structural details of FIG. 2, on the hereby also referred, are removable.

The connection fitting 20 has a substantially cast metal part formed housing 21, the first Flow channel 22 and a second flow channel 23 forms, which, according to the basic shape, are U-shaped and each have the same flow cross-section. This Housing is symmetrical with respect to a transverse median plane 24 formed which the central axes 26 and 27th of the flow channels 22 and 23, respectively, in the central area of the housing 21 of the valve 20 parallel to each other run, cuts at right angles and also at right angles to those through these central axes 26 and 27 spanned level - the drawing level of FIG. 2 - runs.

In the central, block-shaped area 21 'of the housing 21 of the connection fitting 20, the flow channels 22 and 23 against each other is a central hole 28 introduced, the central axis 29 in the Transverse center plane 24 of the housing 21 extends and perpendicular on the through the two central axes 26 and 27 of the flow channels 22 and 23 marked level stands. Both sides of the central bores 28 are in the central housing area 21 'two connection chambers 31 and 32 are provided, their common longitudinal median plane 33 perpendicular to that through the central axes 26 and 27 the flow channels 22 and 23 marked level and perpendicular to the transverse center plane 24 of the housing 21 runs.

The two connection chambers 31 and 32 are each with one, 3 on the Rear of the housing 21 arranged connection piece 34 and 36 provided in FIG. 1 by their chamber-side Mouth openings 37 and 38 represent are. The central axes 39 and 41 of the two connecting pieces 34 and 36 run in the common Longitudinal median plane 33 of the two connection chambers 31 and 32, in the installation position of the connection fitting 20 runs horizontally.

In the installed state of the connection fitting 20 is the a connection chamber 31 over its connecting piece 34 with either the flow connection 16 or the return connection 17 of the respective radiator connected, while the second connection chamber 32 each with the other connection 17 or 16 of the respective radiator connected is.

To connect the flow channels 22 and 23 with sections the supply line 18 and the return line 19, in the flow direction of the radiators 12 to 14 flowing water seen to the connection fitting 20 lead and continue from this, provided Connection piece 42 and 43 of a flow channel 22 and connecting pieces 44 and 46 of the other flow channel 23 of the connection fitting 20 are designed in this way and arranged that their mouth openings, seen in the installed position of the connection fitting 20 point downwards and the central longitudinal axes 47 and 48 of the mouth openings of the connecting pieces 42 and 43 of the "upper" flow channel 22 and the central Longitudinal axes 49 and 51 of the mouth openings of the connecting piece 44 and 46 of the other "lower" flow channel 23 of the connection fitting 20 vertically parallel to each other run and in the through the central longitudinal axes 26th and 27 of these two flow channels 22 and 23 marked - vertical - longitudinal center plane 52 of the connection fitting 20 lie, the connecting pieces 44 and 46 of the lower flow channel 23 between the connecting pieces 42 and 43 of the upper flow channel 22 are arranged and protrude further down than this.

From the connection chambers 31 and 32 of the connection fitting 20, for their further explanation now also on the 4a to 4e, a central one is used Overflow channel 53 or 54 from the central bore 28 of the housing 21 of the connection fitting 20 open. The central axes 56 and 57 (Fig. 4a) of these two Overflow channels 53 and 54 run in alignment with one another, in the - horizontal - common longitudinal median plane 33 of the connection chambers 31 and 32.

From the flow channels 22 and 23 of the connection fitting 20 also goes into the central bore 28 of each Overflow channel 58 or 59 opening housing 21 whose central axes 61 and 62 are aligned with one another and the central axes 56 and 57 of the overflow channels 53 and 54 of the connection chambers 31 and 32 at right angles crossing in the - vertical - longitudinal median plane 52 of the connection fitting 20 run.

In the central bore 28 of the housing 21, 21 ', rotatable about its central axis 29, a total of 63 designated, the basic shape of cylindrical valve plug stored, the two separate flow paths 64th and 66, whose soul axes 67 and 68 in the through the central axes 56 and 57 of those of the connection chambers 31 and 32 outgoing overflow channels 53 and 54 and the central axes 61 and 62 of the flow channels 22 and 23 outgoing overflow channels 58 and 59 marked level, which are shown in the special embodiment with the vertical The longitudinal center plane 52 of the connection fitting 20 coincides.

Relative to the axis of rotation 29 of the valve plug 63 the bore-side openings of the of the connection chambers 31 and 32 and that of the flow channels 22 and 23 outgoing overflow channels 53 and 54 as well as 58 and 59 the same azimuthal width α (FIG. 4c), those in the illustrated, special embodiment is about 40 °. Accordingly, the minimum azimuthal extent is β between two, in the direction of rotation mutually adjacent overflow channels Bore wall sections 69 in the illustrated Embodiment about 50 ° and should in any case be at least 5 ° larger than the azimuthal width α the overflow channels emanating from the flow channels 22 and 23 58 and 59.

The azimuthal extent β 'of that in the cross-sectional representations 1 and 4a to 4e circular sector-shaped Sliding surfaces 71 with which in this cross-sectional view biconcaved central area 72 of the Valve plug 63 sliding close to the wall of the bore 28 is also slightly larger than the azimuthal Width α of the overflow channels 53 and 54 or 58 and 59 and corresponds to the special embodiment shown the minimum azimuthal dimension β of the between two adjacent overflow channels corresponding bore wall sections 69 of the central Hole 28. In the illustrated, selected for explanation Embodiment have the flow paths 64 and 66 of the valve plug 63, the same clear cross-sectional width like the overflow channels 53, 54 and 61 and 62, those of the connection chambers 31 and 32 or the flow channels 22 and 23 go out, so that with this design of the valve plug 63, seen in the respective Cross-sectional representations also radially outer, biconvex lenticular boundaries 73 of the flow paths 64 and 66 are present, the outer lateral surface sections also slide against the bore 28.

The valve plug 63 forms together with that of the connection chambers 31 and 32 outgoing overflow channels 53 and 54 and those of the flow channels 22 and 23 outgoing overflow channels 58 and 59 as a flow control valve exploitable 4/3-way valve 74 that out the locking position shown in Fig. 4a as Home position 0, in which the flow channels 22 and 23 both against each other and against the connection chambers 31 and 32 and these also cordoned off from each other by turning the plug 63 clockwise in the in Figs. 4b and 4c for different Flow cross sections shown functional position I can be brought in which the "upper" Flow channel 22 through the flow path 64 of the valve plug 63 with the one on the left as shown in FIG. 1 Connection chamber 31 and thereby with their connecting piece 34 connected and against the other flow channel 23 and cordoned off against the "right" connection chamber 32 while this is over the other flow path 66 of the valve plug with the "lower" flow channel 23 and therefore with the respective radiator connectable connecting piece of the connection fitting 20 is connected.

The 4/3-way valve 74 arrives by turning the valve plug 63 counterclockwise in its with different Flow cross sections in FIGS. 4d and 4e, alternative to the functional position I Flow position II, in which the upper flow path 22 with the right connection chamber 32 and over this is connected to the right connector 36 with which the connection fitting 20 with the respective radiator is connectable; is further in this functional position II the lower flow channel 23 via the flow path 64 with the left connection chamber 31 and over this with the left connection piece 34 of the connection fitting 20 connected with which this continues to the respective Radiator is connectable.

With conventional radiators manufactured in a compact design 12 to 15, which, as schematically simplified in FIG. 1 is shown, a flat cuboid Have a basic shape and stand upright in a small size Distance from the building walls are installed the flow connections 16 and the return connections 17, meet the specified standards, vertically according to pointing below along the longitudinal median plane of the radiators 12 to 15 arranged, their arrangement one-sided - "asymmetrical" - in the sense that it is in the Near one of the vertical narrow end faces 76 or 77 of the radiators 12 to 15 are arranged, the flow connection 16 but always provided on the inside is, i.e. a smaller distance from the vertical Cross median plane 76 'of the respective radiator 12 to 15 has as the return port 17th

Are both for the construction of a heating circuit "Left-hand" arrangement of the flow connection 16 and of the return connection 17, e.g. in the Fig. 1 shown for the radiator 12, as well as their right-hand arrangement, as for the radiator 13 is shown and is the upper flow channel 22 of the connection fitting 20 each as a section of Flow line and the lower flow channel 23 of the connection fitting 20 each as a section of the return line exploited and the heat is supplied "from the left", i.e. that is, the one from the hot water boiler 11 incoming flow line 18 to the left connecting piece 42 of the upper flow channel 22 connected and its right connector 43 over a further section 18 'of the flow line pipe section forming again with the left connecting piece 42 of the upper flow channel 22 of the connection fitting 20 of the following seen in the flow direction Radiator 13 connected and also the right one Connection piece 46 of the lower flow channel 23 the connection fitting 20 of the "first" radiator 12 of the Heating circuit 10 over a section of the return line of the heating circuit 10 forming pipe section 19 ' with the left connecting piece 44 of the lower flow channel 23 of the connection fitting 20 of the next radiator 13 connected, etc. what cross-free guidance the supply line 18 and the return line 19 as a whole corresponds in the area of the connection fittings 20, with such, the so-called Tichelmann system appropriate circulation of the left connector 44 of the lower flow channel 23 of the connection fitting 20 of the first radiator seen in the flow direction 12 and the right connector 43 of the upper Flow channel 22 of the connection fitting 20 in the direction of flow last radiator ever seen by one Plugs are complete, with the right connector 46 of the lower flow channel 23 Connection fitting 20 seen in the flow direction last radiator, in the so far described Circulation of the second radiator 13 to which the Hot water tank 11 return line 19 is connected, so is the heating operation of the first Radiator 12, the functional position II of the 4/3-way valve 74 of its connection fitting 20 and the second Radiator 13 the functional position I of the 4/3-way valve assigned to its connection fitting 20, as in the above Part of Fig. 1 indicated that in the respective Circuit symbol of the 4/3-way valve 74 the flow arrows are drawn with those in the flow paths 64 and 66 the heat transfer medium flows.

The chain would exist in a Tichelmann system the hot water boiler and interconnected radiators and their connection fittings 20 only the radiators shown in the upper part of FIG. 1 12 and 13 and their connection fittings 20 and would instead of the left connection piece 42 of the upper flow channel 22 of the armature 20 of the first radiator 12 left end piece 44 of the lower flow channel 23 the fitting 20 to the one coming from the hot water boiler 11 Flow line 18 connected, with the result that then the left connection piece 42 of the upper flow channel 22 of the connection fitting 20 of the first radiator 12 should be closed with a stopper and likewise the right connecting piece 46 of the lower flow channel 23 of the connection fitting 20 of the second radiator 13, and the right connector 43 of their upper Flow channel 22 then with the to the hot water boiler 12th returning return line 19 should be connected. In this case it would be for the heating operation of the first one Radiator of this radiator chain suitable flow position of the 4/3-way valve 74 of the connection fitting 20 of the first radiator 12, the functional position I and the one suitable for the heating operation of the second radiator 13 Flow position of the 4/3-way valve 74 its Connection fitting 20 whose functional position II. This means that in the event of an unintentional, a possible installation instruction that the flow line 18 to the left connecting piece 42 of the upper Flow channel 22 of the connection fitting 20 in the direction of flow seen connecting the first radiator 12 be the contrary connection of the flow line 18 to the left connecting piece 44 of the lower flow channel 23 of the connection fitting 20, this "error" without that the other line connections are already correctly laid need to be changed again in a simple way can be remedied that the 4/3-way valve 74 of the connection fitting 20 of the first radiator 12 for its heating mode in its functional position I and the 4/3-way valve 74 of the connection fitting 20 of the second Radiator 13 for its heating operation in the functional position II is operated.

For a total of 4 radiators 12 to 15 and their connection fittings 20 comprehensive heating circuit 10 according to Fig. 1 is by the lower, the radiators 14 and 15 comprehensive part of the case of an installation, leading to a change in the "supply direction" this radiator 14 and 15 leads in that these are now supplied "from the right", the means the flow direction of the heat transfer medium of the respective right connecting pieces 43 and 46 of the upper flow channel 22 and the lower flow channel 23 to the left connecting piece 42 or 44 leads, and that between the connection fitting 20 of the second radiator 13 and the connection fitting 20 of the third radiator 14 the pinouts changed - "confused" - that the right connecting piece 43 of the upper flow channel 22 the connection fitting 20 of the second radiator 13 with the right connector 46 of the lower flow channel 23 of the connection fitting 20 of the third radiator 14 of the heating circuit 10 and the right connector 46 of the lower flow channel 23 of the connection fitting 20 of the second radiator 13 with the right connector 43 of the upper flow channel 22 of the connection fitting 20 of the third radiator 14 has been connected but the rest of the installation is "correct" is such that the left connecting piece 42 of the upper flow channel 22 of the connection fitting 20 of the first radiator 12 connected to the flow line 18 is, the left connector 44 of the lower Flow channel 23 of the connection fitting 20 of the first Radiator 12 is closed by a plug 78, the right connecting piece 43 and 46 of the upper flow channel 22 or the lower flow channel 23 of the Connection fitting 20 of the first radiator 12 with the left connecting piece 42 and 44 of the upper flow channel 22 and the lower flow channel 23 of the connection fitting of the second radiator 13 each connected are, furthermore, the left connecting piece 42 of the upper flow channel 22 of the connection fitting 20th the third radiator 14 with the right connector 43 of the upper flow channel 22 of the connection fitting 20 of the fourth radiator 15 is connected, likewise the left connecting piece 44 of the lower one Flow channel 23 of the connection fitting 20 of the third Radiator 14 with the right connector 46 of the lower flow channel 23 of the connection fitting 20 of the last radiator 15 of the heating circuit 10 connected is, as well as the left connecting piece 42 of the upper Flow channel 22 of the connection fitting 20 of the last Radiator 15 is closed by a plug 79 and the left connecting piece 44 of the lower flow channel 23 of the connection fitting 20 of the last radiator 15 of the heating circuit 10 to the hot water boiler 11 return line 19 connected is.

This type of installation is for heating of the third radiator 14 suitable functional position of the 4/3-way valve 74 of the connection fitting 20 of the radiator 14, the functional position I, while the suitable for the heating operation of the fourth radiator 15 Functional position of the 4/3-way valve 74 at its Connection fitting 20 the suitable functional position Function position II is. However, in this case a "double fault" are accepted that now a subsequent change to the installation to the effect that the left connecting piece 44 of the lower flow channel 23 of the connection fitting 20 of the last radiator 15 by a stopper is closed and the left connecting piece 42 of the upper flow channel 22 of the connection fitting of the last Radiator 15 connected to the return line 19 will, however, with comparatively little effort can be accomplished because of this necessary connection changes at most on last radiator usually a lot more made as a 4 radiator heating circuit 10 Need to become.

A suitable installation instruction for the connection fitting 20 should therefore take into account that when installing the last radiator 15 of a radiator chain a heating circuit 10 is provided that if necessary enough space for the connection changes mentioned is provided.

To explain another embodiment of a - Connection fitting 20 'according to the invention is now 5 and 6a, 6b and 6c, the one shown in FIG. 5 by means of the connection fitting 20 'realizable heating circuit 10' as so-called one-pipe system is formed, in which a hot water flow emanating from the hot water boiler 11, from which to supply the radiators 12 to 15 exploited partial flows by means of the connection fittings 20 'are branched off and by means of this back into between the flow and return of the hot water boiler 11 circulating main stream can be returned from one connection fitting 20 'to the next via only a conduit 18 'to be forwarded.

For the radiators 12 to 15 of the heating circuit 10 ' the same design and arrangement of your flow connections 16 and return connections 17 provided as for 1 explains the heating circuit 10, so that to that extent refer to the relevant description can be.

As far as in Fig. 5 and Fig. 6a to 6c construction and Functional elements of the heating circuit 10 'according to FIG. 5 and the connection fitting 20 'according to FIGS. 6a, 6b and 6c are moved with the same reference numerals as elements of the heating circuit 10 of FIG. 1 and elements of Connection fitting 20 according to FIGS. 2, 3 and 4a to 4e this is the reference to the structural and functional equality or analogy of the identically labeled elements and also the reference to their on the basis of FIGS. 1 to 4e given description.

The connection fitting 20 'is also essential Functional element a 4/3-way valve 74 is provided is implemented constructively in the same way as that correspondingly designated valve of the connection fitting 20th 2, 3 and 4a to 4e.

The control ports 34 'and 36' of the 4/3-way valve 74 the connection fitting 20 'are on the connecting piece 34 and 36 to the flow connection 16 and the return connection 17 of the respective radiator can be connected.

According to the by the arrangement of the lead and Return connections 16 and 17 of the radiators 12 to 14 The connection fitting also has a predetermined orientation 20 'a left connecting piece 81 and a right one Connection piece 82, which, in the equivalent circuit of Fig. 5th seen, each individually with the supply connections 83 and 84 of the 4/3-way valve 74 of the connection fitting 20 ' are connected. Between the connecting pieces 81 and 82 the connection fitting 20 'runs a primary flow channel 86, which contains a choke 87, which is only a small one Has flow resistance and accordingly, via the connection fitting 20 '"away" only a correspondingly small one Pressure drop caused.

The cable routing is according to the heating circuit 10 ' 5 taken so that in the upper part of FIG .. 5 Radiators 12 and 13 shown in the sense of of the explanations given for FIG. 1 "from the left" be, while in the lower part of FIG. 5 shown radiators 14 and 15 supplied from the right will. For the heating operation of the first radiator 12, in which the flow connection 16 and the return connection 17 are arranged on the left side thereof, suitable functional positions of the 4/3-way valve 74 its connection fitting 20 'is the functional position II of the 4/3-way valve 74.

The for the second radiator 13 of the heating circuit 10 'suitable functional position of the 4/3-way valve 74 the connection fitting 20 'of this radiator 13, in which the flow connection 16 and the return connection 17 on the right side of the radiator 13 are arranged is the functional position I of the 4/3-way valve 74. Accordingly, that is for the heating operation of the in the flow direction 88 of the main hot water flow seen third radiator 14 suitable functional position of the 4/3-way valve 74 of its connection fitting 20 'the functional position II and for the "last" radiator 15 of the heating circuit 10 'according to FIG. 5 suitable functional position of the 4/3-way valve 74 of its connection fitting 20 'whose functional position I.

5 that when always "mixed up" the connections during installation are, over the two in the main flow direction 88 on each other following connection fittings 20 'of the respective Radiators are connected to one another Error due to "switchover" of the respective 4/3-way valve 74 can be compensated again without the Cable routing must also be changed.

The overall designated 88 housing the in details 6a to 6c connection fitting shown 20 'comprises an outer, pot-shaped in the basic form Housing part 89 with a substantially circular cylindrical Mantle 91 and an inner one, in its central Area block-shaped housing part 92, that with its cylindrical outer surface 93 the radially inner boundary of the primary flow channel 86 forms its radially outer boundary through the jacket 91 of the outer housing part 89 is formed, wherein the main flow channel 86 extends over an azimuthal range extends from about 270 °. The outer housing part 89 is symmetrical with respect to its vertical transverse median plane 94 formed between the connecting piece 34 and 36 runs over which the connection fitting 20 'to the flow connection 16 and the return connection 17 of the respective radiator is connectable and also between transition pieces tapering downwards 96 and 97 of the outer housing part 89, via which the main flow channel 86 to the left connecting piece 81 and the right connector 82 of the connection fitting 20 'connects. In a coaxial arrangement with the central axes 98 and 99 are within the Transition pieces 96 and 97 are in the same sense as these tapered nozzles 101 and 102 are provided, which each open into an antechamber 103 or 104, which within of the inner housing part by radially extending Partitions 106 and 107 are offset against each other , these radial partitions 106 and 107 from the central block-shaped area 108 of the inner Go out housing part 92, which is designed such that the antechambers 103 and 104 each communicating with each other Connected sections 103 'and 103 '' or 104 'and 104' '.

The valve plug 63 of the 4/3-way valve 74 is around central axis 29 of the central bore 28 of the central block-shaped part 108 of the inner housing part 92 rotatably supported and corresponds in terms of training its flow paths 64 and 66 the valve plug 63 of the embodiment as shown in FIGS. 4a to 4e explained.

The connection chambers 31 and 32 of this embodiment corresponding connection chambers 31 and 32 of the connection fitting 20 'are through this in the block-shaped Housing part 108 bores 109 and 111 limited, of which in the central bore 28th outgoing overflow channels 53 and 54. This too Bores 109 and 111 are symmetrical with respect to FIG in the installed state of the connection fitting 20 'vertically extending transverse central plane 94 of the same.

The position of the valve plug shown in FIG. 6a corresponds to the blocking basic position 0 of the 4/3-way valve 74 of the connection fitting 20 '.

The position of the valve plug shown in FIG. 6b 63, which by twisting the same against the - locking - basic position 0 adjustable clockwise corresponds to functional position I of the 4/3-way valve 74 of the connection fitting 20 '. The in the Fig. 6c shown position of the valve plug 63 by Turning it from the locking basic position 0 valve 74 is adjustable counterclockwise, corresponds to functional position II of the 4/3-way valve 74.

For example, for the heating operation of the first Radiator 12 of the heating circuit 10 'according to FIG. 5 exploited functional position II (Fig. 6 c) flows hot water flowing from the hot water boiler 11 to one Part through the nozzle 101 into the prechamber 103 of the connection fitting 20 'and a further part on the Primary flow channel 86 to the right connector 82 the connection fitting 20 ', in this case the inlet side arranged nozzle 101 by its jamming effect the power distribution mediates and a - weak - throttling effect, which affects the partial stream forwarded via the primary stream channel 86 also through the nozzle 102 arranged on the outlet side in the narrowing area of the transition piece 97 comes about where the primary current emerges whose speed is increased and thus at the outlet nozzle 82 relative to that inside the exit side arranged nozzle 102 prevailing pressure a lower Pressure arises through which the outflow of water is favored from the antechamber 104. That about the nozzle 101 arranged on the inlet side into the prechamber 103 inflowing hot water passes through the flow path 66, in this functional position of the valve plug 63 the area 103 ″ of the prechamber 103 with the right connection chamber 32 connects to the flow connection 16 of the radiator, not shown in FIG. 6 c 12 and within it - via the return connection 17 this radiator 12 "back" to the left Connection chamber 31 and from this via the flow path 64 of the valve plug 63 into the one arranged here on the outlet side Pre-chamber 104, from which the water, which in the Radiator 12 heat has been removed - favored through the described flow pressure conditions - via the nozzle 102 and the connecting piece 82 to the next connection fitting 20 'leading pipe 18'.

In the case of the heating operation of the second radiator 13 of the heating circuit 10 'according to FIG. 5 suitable functional position I of the 4/3-way valve 74 of the connection fitting 20 'result from the directional arrows 6 b indicated flow conditions, the with respect to the hot water flowing in the primary flow channel 86 they are the same as described with reference to FIG. 6 c and with respect to the flow directions the connecting piece 34 and 36 directed in opposite directions are.

Both in the connection fitting 20 and in the connection fitting 20 'can the connection chambers 31 and 32 and the antechambers 103 and 104 of the connection fitting 20 'and their primary flow channel 86 on one side through a Plate must be completed on the actuator for the valve plug 63 and the connecting piece 34 and 36 can be mounted.

Both in the connection fitting 20 shown in FIG. 2 and in the connection fitting 20 'according to FIGS. 6 a to 6 c are in normal operation of the heating circuit 10 or 10 ' Plug closed filling and emptying channels provided over the - in the locked position 0 of the respective 4/3-way valve 74 - the connection chambers 31 and 32 can be opened "to the outside", either to drain the connected radiator or to refill it with water. This is also created the possibility for both the 2-pipe system 10 as shown in FIG. 1 as well as in the 1-pipe system 10 ' 5 if necessary individual radiators to be able to remove the system without its functionality otherwise affect.

As an alternative to the arrangement shown in FIG. 2 of connecting pieces 34 and 36 on the "back" of the Connection fitting 20 can, as the view representation 7 shows these connecting pieces 34 and 36 also arranged on the "front" of the connection fitting 20 be where the actuator 74 'for the 4/3-way valve 74 of the connection fitting 20 is arranged, and it can also be on this side of the connection fitting the plugs 112 and 113 may be arranged when they are removed the connection chamber 31 and 32 open to the outside are.

One for the connection fitting 20 ', as shown in FIG. 6 a to 6 c explained in structural details, suitable Arrangement of functional plugs 112 'and 113 'with respect to the connecting pieces 34 and 36 and the Actuator 74 'of the valve tail 63 of the connection fitting 20 'is finally shown in FIG. 8.

Due to the constant variability of the flow resistance of the 4/3-way valves 74 of the connection fittings 20 or 20 'leading flow paths can also electrically controllable for actuating these valves Drives 114, as shown in FIGS. 1 and 5 schematically are suggested and these become electronic controlled temperature control operation exploited be by means of an electronic control unit 116 according to output signals from temperature sensors and enterable temperature setpoints is controllable.

To explain another embodiment of a in the case of a single-pipe system, as in FIG. 5 shown, trained heating circuit 10 'can be used Connection fitting 20 '' to the connection fitting 20 'according to FIGS. 6a, b and c and 8 functionally equivalent is and in a largely structural analogy to this is realizable, now refer to FIGS. 9a, b and c referenced.

So far in FIGS. 9a to 9c for elements of these figures the same reference numerals are given as for Elements of FIGS. 6a to 6c are intended to indicate this the structural and functional equality or analogy of these Mean elements and at the same time the reference to the description given with reference to FIGS. 6a to 6c include these elements to avoid repetition.

The explanation of the embodiment according to FIGS. 9a to 9c can therefore be based on its structural differences compared to the embodiment according to FIGS. 6a to 6c can be limited.

In the connection fitting 20 '' according to FIGS. 6a to 6b are the two throttling points 87 by the conical Transition pieces 96 and 97 of the housing 88 'of Connection fitting 20 '' and the nozzles 101 and 102 are formed are, as it were, by the shortest route through the primary flow channel 86 directly connected to each other here between the 4/3-way valve 74 and the connecting piece 81 and 82 runs. With this guide of the overflow channel 86, it is possible that the housing part 88 ', the a limitation of the antechambers 103 and 104 and the Connection chambers 31 and 32 and further the central one Transfer channels 53 and 54 mediated and also the central Bore 28 contains, in which the valve plug 63 of the 4/3-way valve 74 is rotatably supported as a one-piece Cast part can be formed, as in the embodiment 9a to 9c provided is and casting technology compared to the embodiment a significant simplification according to FIGS. 6a to 6c represents.

The left antechamber as shown in FIG. 9a 103 is designed as a channel, which for the most part its length with respect to the central axis 117 of the left connection chamber 31 forming housing bore 109 runs concentrically and radially into the central hole 28 opens into the valve plug 63 around its central Axis 29 is rotatably mounted.

The connection chamber 31 with the central bore 28 of the 4/3-way valve 74 connecting central overflow channel 53, each radially in the central bore 28 and the bore forming the connection chamber 31 109 opens out, runs along a course of about 90 ° extending circular arc. The same goes for the central bore 28 with the right connection chamber 32nd connecting overflow channel 54 along an over approximately 90 ° circular arc, each radially in the holes 28 and 111 opening.

9a to 9c right antechamber 104 comprises a radially opening into the central bore 28, otherwise this bore 28 with the nozzle 102 almost rectilinearly, that is to say connecting the channel section 104 '''and one with this and of the nozzle 102 in communicating connection, blindly ending channel section 104 ^IV , which extends along a 180 ° arc and runs concentrically with respect to the central axis 118 of the bore 111 forming the right connecting chamber 32. At the end of this curved channel section 104 ^{IV of} the right antechamber 104 remote from the nozzle, a housing bore 119 opening into this channel section 104 ^{IV is} provided, which can be closed by means of a plug, not shown, which, for example. is removable for venting and / or emptying the connected radiator.

The azimuthal distances between adjacent openings, via which the prechamber channels 103 and 104 '' 'and the central overflow channels 53 and 54 into the central Bore 28 open, are each 90 °, the mouth openings the prechamber channels 103 and 104 '' ', on the one hand and the mouth openings of the central overflow channels 53 and 54, on the other hand, each other are arranged diametrically opposite. The corresponding 9a to 9c provided guidance of Flow channels are fluidly favorable and allowed a particularly space-saving design of the connection fitting 20 ''.

9a, 9b and 9c are those positions of the valve plug 63 shown that the blocking Home position 0 of the 4/3-way valve 74 and its Functional position I and its functional position II at each correspond to the maximum flow cross-section.

From the blocking basic position 0 of the 4/3-way valve Starting from 74 is the functional position shown in FIG. 9b I with the maximum opening cross section of the Flow path 64 by rotating the valve plug around 45 ° counterclockwise reached. Also from the blocking basic position 0 of the 4/3-way valve 74 starting 9c, with maximum Opening cross section of the flow path 66 linked Function position II of the 4/3-way valve 74 by turning the valve plug 63 by 45 ° counterclockwise reached.

The valve plug 63 has the basic shape of a circular cylinder, the one with two in relation to its central longitudinal axis 29 'arranged diametrically opposite one another Slots 64 'and 66' is provided which is concave have a vaulted slot base and the chick-side boundaries the flow paths 64 and 66 of the 4/3-way valve 74 form. The chick 63 consists of a solid, e.g. steel core 121 and one this one with the exception of its one, when installed of the chick 63 accessible end face 122 completely enveloping, thin jacket 123, made of rubber or an elastomeric plastic material that both provides a good sealing effect as well - with tight fit of the valve plug 63 - another one sufficient lubricity in the central Hole 29 of the valve body 88 'mediated. The Thickness of this jacket is based on the diameter of the central one Hole 29 matched so that it is used Condition of the valve plug 63 under a moderate elastic compression preload is available, which on the one hand the good sealing effect is achieved and on the other hand it is ensured that the chick 63 in a set position remains frictionally.

The valve plug 63 is common, not special represented means, e.g. anchored to the housing Snap rings on which it is with its free Axially supported end face 122 against disengagement the central bore 29 secured. It is on this provide a transverse slot 124 on the free end face, with that for setting a desired functional position of the 4/3-way valve 74 is a screwdriver Can be brought into engagement or, if an actuator 114 is present, one arranged on the output shaft Coupling spring is engaged.

Claims (8)

1. Connecting armature (20;20') for the connection of heating units (12, 13, 14, 15) of a heating circuit (10,10') of a heating system for a building with its source of heat, e. g. a hot-water boiler (11), the heating units being connected between a flow pipe connection (18) and a return pipe connection (19) of the boiler, in which a heat-transport fluid used for the heat transfer may be carried to an preselectable flow temperature and the heat-transport fluid being conducted to the heating units of the heating circuit by means of a feed pump and each of the heating units having a flow pipe connection (16) and a return pipe connection (17) via which, in flow direction of the heat-transport fluid, the heat-transport fluid heated to a high flow temperature is passed to the respective heating units and then, after having conveyed some of the carried quantity of heat flowing through the heating circuit for the achievement of the desired room temperature, the heat-transport fluid is conducted again to the boiler, and an adjusting device is provided to adjust the cross section of flow of the connecting armature's flow path leading to the flow pipe connection (16) of the heating unit and the cross section of flow of the connecting armature's flow path leading off the return pipe connection (17) of the heating unit between a maximum value and the complete shut-off, characterized in that as the adjusting device a 4/3-port directional valve (74) designed as a flow control valve is provided, which, from a first flow position (I), in which a connection branch (34 or 36) of the connecting armature (20;20') being installed in a fix connection with the flow pipe connection (16) of the respective heating unit (12, 13, 14, 15) is connected with a supply pipe connection (42, 44; 81) of the connecting armature (20;20'), and a connection branch (34, 36) of the connecting armature (20;20'), being installed in a fix connection with the return pipe connection (17) of the respective heating unit is connected with a transferring connection branch (43, 46; 82) of the connecting armature (20;20'), can be switched via a blocking position (0), in which the leading and transferring pipe connections of the connecting armature (20;20') are blocked against the connection branches (34, 36) installed in a fix connection with the respective heating units, over to an alternative flow position (II), which is complementary to the first flow position (I), and in that the 4/3-port directional control valve (74) is designed as a proportional valve, which, with increasing displacement of a valve body (63) from its blocking basic position in the sense of the respective, alternative conduction of the flow paths in the flow positions (I and II) opens increasing cross sections of flow.
2. Connecting armature according to claim 1, characterized in that the 4/3-port directional control valve (74) is designed as a rotary valve with a valve body of cylindrical form (63).
3. Connecting armature according to claim 1 or claim 2, characterized in that a circulatory channel (22) of the connecting armature (20) forms a section of the flow pipe, and a circulatory channel (23) forms a section of the return pipe of a two-pipe system, said two sections can be connected in alternative flow paths via the 4/3-port directional control valve (74) to the flow and return pipe connections (16, 17) of the respective heating unit (12, 13, 14, 15).
4. Connecting armature according to claim 1 or claim 2, characterized in that the connecting armature (20') has a main flow channel (86) extending between an inflow connection (81) and an outflow connection (82) said main flow channel being provided with a flow control valve for flow division (87) which develops only a low derating effect and derives a secondary flow from the main flow, said secondary flow flowing to and returning from the heating unit via the 4/3-port directional control valve (74).
5. Connecting armature according to claim 4, characterized in that the flow control valve (87) is formed by a flow division nozzle (101) deriving from the hot-water supply the partial flow, which is conducted to the connecting armature (20') via the 4/3-port directional control valve (74), and transferring the rest of the hot-water flow through the main water channel (86), which receives again the derived partial water flow which is conducted via the 4/3-port directional control valve (74).
6. Connecting armature according to claim 5, characterized in that an injection nozzle (102) is provided for the reintroduction of the water (partial water flow), which is conducted from the heating unit via the 4/3-port directional control valve (74) to the main flow channel (86) into the main flow, the dimensioning of the nozzle corresponding to that of the flow division nozzle (101).
7. Connecting armature according to one of the claims 1 to 6, characterized in that electrically-controlled actuators (114) are provided for the adjustment of the effective cross sections of the flow channels (64, 66) of the 4/3-port directional control valve (74).
8. Connecting armature according to one of the claims 1 to 7, characterized by its design as a compact unit arranged in a control wall case.

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