EP1528330A1 - Assembly for a compact heating installation - Google Patents

Abstract

The modular unit for a compact heating system has rear connections for a plate heat exchanger includes a pump housing (24) connected on both sides to a valve housing (25,26). An insertion chamber (36,48) accessible from the front is provided in each valve housing to accommodate at least one valve. The insertion chambers each form a connection base for a pipe connector (19,20) for the heating system, a passage leading to the heat exchanger, and at least one additional passage or connector (37,38,58).

Description

The invention relates to a structural unit for a compact heating system.

Such units are state of the art and serve if possible, all fittings of such a heating system to take up space and the necessary channel connections and provide line connections. This is not intended Only a compact design can be achieved, but beyond both the manufacturing and assembly costs and the later Maintenance costs are reduced.

From DE 100 07 873 C1 is a structural unit for a compact heating system known, having two heating circuits, one for heating the heating water for central heating and another for heating of the service water. The unit described there is comparatively compact and essentially composed of three injection-molded parts, of which the first centrally located forms the pump housing, formed open to the front for receiving the motor unit is, and the other two on both sides adjoining fitting housing form.

Based on this prior art, the present invention the object of further improving such a unit, in particular to increase the functionality and thus installation and To further simplify maintenance.

This object is achieved according to the invention by those specified in claim 1 Characteristics solved.

Accordingly, the invention provides a unit for a compact heating system which rear connections for a plate heat exchanger a central pump housing or pump housing component, connect to the valve housing on both sides, whereby the pump housing for receiving the impeller and for connection the electric motor is designed to be open at the front. In every valve body is provided from the front accessible insertion space, which serves to accommodate at least one valve. Furthermore form these insertion spaces each have a connection base for a connecting piece the heating system, one leading to the plate heat exchanger Channel and at least one other channel or connection.

The basic idea of the present invention is, by the two laterally to the pump housing adjoining fitting housing their insertion spaces each have a connection base for the connected or to be connected lines and at the same time the take necessary fittings, by means of the front accessible drawer spaces, allowing a change of fittings as well in the installed state is easily possible. The plate heat exchanger connects the side fitting housing, so that between this valve housing the pump housing form-fitting can be incorporated. Such a unit may, as in the following will be described in detail, preferably from three injection-molded parts are formed exclusively by means of drawing cores, So can be produced without melting cores, which manufacturing technology is beneficial.

Armature in the context of the present invention are not just valves or other switching devices, this can include components such as air or Be dirt separator or parts thereof or, for example, a cap for a control opening.

Preferably, the insertion spaces are based on the pairs trained Connecting piece for the plate heat exchanger arranged so that they overlap one connection in the direction of insertion, so no separate cross channel to connect between Insertion space and connection piece of the plate heat exchanger is required. Preferably, the insertion spaces are each bottom side with a leading to the plate heat exchanger channel, for example through an opening in the ground, connected with this channel in Insertion direction and the connection piece of the heat exchanger out runs. In this way, insertion space and channel can each through Formed from the front or from the rear drawing cores formed in the tool be, with the pulling core for the channel at the same time for the connecting piece Use finds.

It is advantageous if the insertion spaces each have a circular Have cross-section and with their longitudinal axes substantially parallel are arranged to the axis of rotation of the impeller. Then you can in the drawer spaces einziehliedernden fittings / inserts also in mounted state can be inserted from the front. Because of the round Cross-section is a simple seal, for example by O-rings possible. In addition, also bayonet or screw connections be realized, which is turning a valve in make the insertion space necessary.

One of the insertion spaces is advantageous for receiving a switching valve provided, in particular a 3/2-way valve, which preferably as a plug-in unit from the front into the insertion space is einkliederbar. In this case, the insertion unit expediently not only the valve body, but also the sealing seats on, so that in the case of a defect or during maintenance, all essential to the operation Parts of the switching valve forward together with the plug-in unit pulled out and overhauled or replaced can. It is understood that the insertion space in the area of the switching valve corresponding channel connections for the three alternately Having pairs to be interconnected channels.

The changeover valve controls the coming from the primary heat exchanger Heating water flow either in the heating network or in a secondary heat exchanger, typically a plate heat exchanger. The Control takes place in dependence of the dhw flow, for which appropriate sensors and control electronics are provided. actuated the valve is actuated by appropriate actuation means, preferably an electric motor.

To the actuating means which control the valve, as close as possible, However, to accommodate sealed against the fluid space is according to a development of the invention in the valve body transverse to Insertion direction for the switching valve another, preferably from provided above accessible insertion space, the inclusion the control means, in particular of the electric motor is provided. The close to the valve arrangement of the motor at the top is in terms of mechanical transmission particularly favorable and has to the advantage that the motor pulled upwards from the insertion space can be to wait for this example or exchange. As above the unit typically a certain amount of space is present, so this positioning is particularly cheap and good accessible, d. H. both valve and motor can be exchanged without having to remove the unit.

It is particularly advantageous in terms of design, if on the valve-side fitting housing a vertically downwardly directed channel to a connection piece is provided for the heating flow, preferably connected to the space provided for the switching valve insertion space.

This channel, which is then driven by the switching valve leads down to a connecting piece for the heating flow. These Connecting piece for connection to the stationary cables at the bottom to arrange the unit is particularly favorable, since the lines especially when retrofitting the heating system, such as this is common in old buildings, regularly in the floor or skirting area are misplaced and therefore come from below. The connection of these lines is therefore simplified, especially because of the good accessibility the piping connections in this area of the compact heating system.

It is favorable if, on the channel leading to the heating flow Bypass channel connects, preferably parallel to the insertion direction extends under the valve-side insertion space to the rear and there opens into a leading to the suction side of the pump transverse channel. Such a bypass channel is required for compact heating systems, even if all the thermostatic valves on the radiators are closed and thus no flow through the heating system is possible, a circulation at least within the compact heating system to ensure.

So that the bypass channel does not hydraulically short the pump it is regularly required to use a control valve. This will be beneficial Inserted from behind in the channel and by the expert in the Installation of the system set. Manufacturing technology is this arrangement low, as the valve in the anyway required for the channel Pull core opening can be incorporated. This arrangement offers but also in particular during operation of the system considerable advantages. It not only increases the compactness of the unit, but ensures at the same time that, when installed, the control valve is not accessible is not accidentally manipulated by an operator can be, but only targeted by the professional installation or after removal of the unit.

It is favorable if at the valve-side installation space, ie where that Switching valve is incorporated, laterally a channel with line connection connects to a line leading to the primary heat exchanger, and Although preferably transverse to the insertion direction and at the of the pump opposite side of the valve body. This from the primary heat exchanger the next line is through the changeover valve optionally with the input line to the secondary heat exchanger (plate heat exchanger) or connected to the heating flow. As the primary heat exchanger typically in the upper part of the compact heating system, So is located above the unit and its lines Side down to the unit lead, it is also assembly technology particularly favorable, this connection seen from the front the left side of the valve-side fitting housing to provide since then, namely a connection which usually consists of a substantially rigid pipe formed conduit is easy to accomplish.

If, as provided according to the invention, in each of the valve body a frontally accessible insertion space is provided so is it is expedient, on the one hand the insertion spaces by bayonet connections by means of a lid or the insertable fitting insertable therein to complete an exchange of fittings or the Access to the drawer spaces is quick and easy. Prefers identical bayonets are used for both slots, so that same seals and the same cover or fittings connections Can be used.

Advantageously, the other insertion space for receiving a Dirt separator provided and designed. Then you can go Opening the cover of the slide-in space of the dirt separator and so that the dirt collected in it is removed or is at least accessible to remove deposits located therein can. It also needs no separate installation space for a Dirt separator can be provided. The insertion space is corresponding large dimensioned in spite of the separator Flow cross-section reduction sufficient effective To ensure flow cross-section. The dirt separator will therefore advantageously incorporated as a sieve-like insert in the insertion space, which is removable from the front after removing a lid. In the cover of the insertion space can be further fittings or sensors be integrated.

It is advantageous according to a development of the invention in the lid a safety valve incorporated, which when exceeding a predetermined Pressure releases a connection to outside atmosphere or a channel connection in a drain or a collecting vessel. By the arrangement of the valve in the lid can quickly replace this checked and cleaned, it also claims the least possible Installation space within the unit.

In this case, the lid is advantageously integral with a component in the Lid integrated faucet, especially the safety valve and as Plastic injection molded part formed. The lid can thus simultaneously Cover function and, for example, housing function for the safety valve form.

Also the dirt separator side slide housing forms according to the invention, a connection base as explained above. Advantageous it has two lateral connections for a heat storage for storage of heated heating water, which by a einlildbare Partition are channel separated. The arrangement is chosen that at the integration of the partition, the lateral connections the Heat storage in series with the coming out of the plate heat exchanger Current to the primary heat exchanger is. Should, however, the unit are used without heat storage, then only the to close lateral connections. By then not incorporated Partition is the plug-in housing in the axial direction freely continuous. This design variant thus allows with the same tool a unit for both compact heating systems with and for produce without heat storage.

It is also advantageous on Schmutzabscheiderseitigen valve body a vertically downwardly directed channel to a connection piece provided, namely for the heating return. This channel closes preferably at the intended for the dirt separator insertion space at. Thus, the connection piece for the heating return parallel to the for the heating flow outgoing down be provided, which is advantageous for the aforementioned reasons is.

Since it is necessary to incorporate sensors into the module, it is expedient to do so arrange so that they are easily accessible even in the installation position and, if necessary is verifiable or exchangeable. For this reason is according to a development of the invention in the case of the dirt separator provided insertion space preferably at the top a connection for incorporating a sensor is provided. This sensor connection also advantageously has a bayonet connection, so that The sensor is interchangeable quickly and without tools.

Furthermore, it is advantageous if at the on between the insertion housing and connecting piece arranged for the heating return Channel a lateral connection is provided by means of a valve is lockable. The compact heating system can then be connected via this lateral connection emptied when installed or by connection be filled a corresponding pressure line.

Advantageously, the Schmutzabscheiderseitige insertion space a bottom-side opening, which is a fluid-conducting connection to a running in the direction of insertion channel to a connection piece forms for the plate heat exchanger. In the same way as with the valve-side insertion space is thus a direct channel connection formed to the connection piece for the plate heat exchanger, which are formed by a simple pulling core in the tool can. For this purpose, it is expedient if, on the one hand, the axes of insertion space and channel are arranged parallel to each other and the Cross sections of insertion space and channel (seen in the direction of insertion) overlap.

Furthermore, according to a development of the invention to the dirt separator side insertion space preferably in the floor area a leading to the suction side of the pump channel. This will on the one hand, the functionality of the dirt separator side insertion space as connection base further increased, besides, can here on comparatively short way the required connection channel to Suction nozzle of the pump are molded, which are immediately adjacent the Schmutzabscheiderseitigen valve body is arranged. There Both the valve body and the pump housing or the this receiving injection-molded component as a separate injection molded parts are made, which are joined only during assembly, this can Quercanals also advantageously by pulling cores in the injection mold be realized without costly melting cores required are.

Advantageously, the assembly is designed so that not only for the heating flow and the heating return down-facing spigot are provided at the bottom of the unit, but that also the two other connections for the hot water supply and the coming from the compact heating system heated Domestic hot water is provided at the bottom. So it is convenient all four connecting pieces for the heating circuit and the Domestic hot water supply provided on the underside of the unit, so that these with little maintenance to the local stationary lines can be connected.

The connections are advantageously arranged so that they are all lie in a horizontal plane. Then the unit, when the down-going ports as plug-in connections are formed, by lowering down to the stationary lines be connected to the line, wherein for sealing simple O-rings serve as in connection connections such By the way, building units are state of the art.

Usually these are known in building units connectors each positively secured by an approximately U-shaped bracket, the after connecting the lines by joining transversely to Connection is postponed. When arranging the plug connections in the same horizontal plane can, if appropriate, in view of front side by side arrangement of the connections, these positive locking in an advantageous manner by a central Closing plate done, d. H. that the unit after lowering down by inserting the central closure plate completely is connected without further assembly work required are.

Fig. 1

ein vereinfachtes Schaltbild einer Kompaktheizungsanlage mit einer erfindungsgemäßen Baueinheit,

Fig. 2

die komplett bestückte Baueinheit in perspektivischer Ansicht von rechts oben und vorne,

Fig. 3

die Baueinheit nach Fig. 2 in perspektivischer Ansicht von rechts unten und hinten,

Fig. 4

die Baueinheit in Darstellung nach Fig. 2 ohne Pumpenkopf und mit nach vorne offenen, unbestückten Einbauräumen,

Fig. 5

die Baueinheit nach Fig. 2 in perspektivischer Ansicht mit abgenommenen Plattenwärmetauscher von oben links und hinten,

Fig. 6

einen Schnitt durch das ventilseitige Armaturengehäuse in einer in Einschubrichtung liegenden Ebene,

Fig. 7

eine Ansicht der Baueinheit von vorne mit abgenommenen Pumpenkopf und nach vorne offenen und unbestückten Einbauräumen,

Fig. 8

in perspektivischer Darstellung von rechts oben und hinten das schmutzabscheiderseitige Armaturengehäuse

Fig. 9

das schmutzabscheiderseitige Armaturengehäuse gemäß Fig. 8 in teilweiser Schnittdarstellung,

Fig. 10

den hinter dem Saugmund liegenden Teil des Pumpengehäuses in perspektivischer Teilschnittdarstellung und

Fig. 11

einen Schnitt durch das Pumpengehäuse quer zur Laufradachse und in Strömungsrichtung unmittelbar vor dem Saugmund in Ansicht von hinten.

The invention is explained in more detail with reference to an embodiment shown in the drawing. Show it:

Fig. 1

a simplified circuit diagram of a compact heating system with a structural unit according to the invention,

Fig. 2

the fully assembled unit in perspective view from the top right and front,

Fig. 3

2 in a perspective view from the bottom right and bottom,

Fig. 4

2 in the illustration according to FIG. 2 without pump head and with open, unpopulated installation spaces,

Fig. 5

2 in a perspective view with removed plate heat exchanger from top left and rear,

Fig. 6

a section through the valve-side fitting housing in a plane lying in the direction of insertion,

Fig. 7

a view of the unit from the front with removed pump head and front open and unpopulated installation spaces,

Fig. 8

in perspective from right above and behind the Schmutzabscheiderseitige valve body

Fig. 9

the dirt separator side fitting housing of FIG. 8 in a partial sectional view,

Fig. 10

the lying behind the suction part of the pump housing in a perspective partial sectional view and

Fig. 11

a section through the pump housing transverse to the impeller axis and in the flow direction immediately in front of the suction mouth in view from the rear.

The compact heating system shown with reference to FIG. 1 is a Gas boiler, as they are typically wall-mounted as a compact Device for supplying heat to a person working with radiators Space heating and for hot water / hot water production is provided. A burner 1 acts on a primary heat exchanger 2, whose heated water is a heat exchanger 3, typically in the form of one or more radiators for space heating, fed becomes. The cooled water flows out of the heat exchanger 3 again to the primary heat exchanger 2 and is by means of one on the cold side the heat exchanger 2, 3 arranged circulating pump 4 circulated.

For hot water heating, a plate heat exchanger 5 is provided, in which the coming from the water network cold Hot water is heated. As the heating of the service water only has to take place in Abnahmefall is appropriate sensor, in particular a flow meter 6 as well as a pressure and temperature sensor 7 provided, depending on the output signal of a servomotor 8 is driven is, which controls a 3/2-way valve 9, for the domestic water heating the coming from the primary heat exchanger 2 heat-conducting Liquid flow instead of the heat exchanger 3 to the plate heat exchanger 5 to redirect.

The graph of Fig. 1 makes no claim to completeness. Within the compact heating system is a surge tank 10th provided and a heat accumulator 11, between the plate heat exchanger 5 and the primary heat exchanger 2, here on the cold side, is connected in series.

The symbolized in Fig. 1 with 3 heat exchanger (radiator) is, as today common in hot water heating systems, with a thermostatic valve 12 provided that the circuit in terms of flow resistance controls and then, if no heat demand is given, locks. For the latter Case is a bypass line within the compact heating system 13 provided with a valve 14, via which the hydraulically effective Line cross section of the bypass line 13 is adjustable. Through this bypass line 13 is a closed circulation ensured, even when the thermostatic valve 12 is fully closed.

Furthermore, a safety valve 15 in the form of a pressure relief valve provided on the suction side of the pump 4 and two shut-off valves 16 and 17, which are connected via a line 18 with each other.

In addition to the electrical and gas line connections for the compact heating system, which are not shown in the figures, the heating system a total of four cable connections in the form of plug connections on, namely a connection 19 for the heating flow so as a connection 20 for the heating return. Furthermore, there is a connection 21 for the domestic water supply and a connection 22 for the off the system provided warm domestic hot water.

The framed in Fig. 1 by broken lines part of the compact heating system is formed by a structural unit 23 whose structure is shown in detail with reference to the figures 2 to 9.

The assembly 23 is constructed essentially of three injection-molded parts, namely a central, the pump housing containing pump housing component 24, seen on the left in the installation position from the front a fitting housing 25 and the right side a valve body 26 connect. The components 24, 25 and 26 are made as injection molded components Made of plastic and designed to work without it of fused kernels, d. H. built with comparatively inexpensive Tools that work with drawing cores can be produced. These components 24 to 26 are in the transverse direction 27 to the impeller axis 28 of the pump are integrated into each other and through the rear connected plate heat exchanger 5 form fit in this Secured position.

The pump housing component 24 has the actual pump housing on and a forwardly open insertion space 29, for recording of the pump impeller and for flanging of it after front adjoining motor 30 is provided. The pump housing has a sloping right above outgoing discharge nozzle 31, whose free end is formed as a threaded connection and for connection provided the leading to the primary heat exchanger 2 line is. Suction-side connected to the pump housing or into the pump housing component 24 integrated is an air separator 32, in which a usual Luftabscheideventil is incorporated.

The rearward suction port 33 of the pump is over a in Transverse 27 extending suction channel 34 with the valve body 26 line connected, in which this opens. The suction channel 34 sets continues in the valve body 26 continues to the right and opens into a rearwardly obliquely forward and upward channel 35, which is in a substantially cylindrically shaped, with his Cylinder axis parallel to the impeller axis 28 and open to the front Sliding space 36 passes, which is a central starting point for more Connections or lines as used to hold fittings.

In the insertion space 36 of the right fitting housing 21 open the channels of two lead out to the right line 37 and 38, which serve to connect the heat accumulator 11. To the beginning To achieve described series connection is in the insertion space 36 pressed from the front of a partition 39. This partition 39 is formed by a simple sheet metal or a plastic part, since it is here to a complete seal to the insertion space 36 does not matter. For versions in which no heat storage 11 is used is the partition wall 39 is not used, the terminals 37 and 38th are closed by blind caps, so they are out of action.

In the insertion space 36 opens from below a line 40, at the End of the connection 20 is arranged for the heating return.

The bottom of the insertion space 36 is not only broken through to the channel 35, but also in the upper left area (see Fig. 7), where a rearward channel opens, which is in alignment with a lower connection piece 41, which is used to connect the plate heat exchanger 5 is provided. The connecting piece 41 is a pair of connecting pieces formed together with the overlying connecting piece 42. The connecting piece 41 connects the Heizwasserkreislauf the Heat exchanger 5 with the suction side of the pump 4. The upper connection piece 42, however, connects the hot water leading Hot water connection of the heat exchanger 5 with a vertical down leading channel 43, which in the connection 22 for warm Hot water flows.

Near the rear end of the insertion space 36 is up Port 66 is provided for the expansion tank 10.

Furthermore, in the insertion space 36 opens an obliquely from above and front receiving opening 44, which at the end with a Part of a bayonet lock is provided and in a combined Pressure and temperature sensor 45 is incorporated as a plug-in, the with the other part of the bayonet lock is equipped.

The insertion space 36 itself serves to receive a dirt separator 46, which is inserted and arranged in the manner of a sieve in these is that of port 20, so from the heating return coming water must penetrate this before it to the suction channel 34 passes the pump. The dirt separator 46 is positive held and pulled forward for cleaning purposes.

The insertion space 36 is forward with a bayonet lock provided so that a corresponding lid to complete the insertion space 36 mounted without tools and, if necessary, again can be removed. It is understood that corresponding O-rings as Seals are provided at the required locations.

In the illustrated embodiment, a safety valve is in the lid 47 15 incorporated in the form of a pressure relief valve. It forms the Lid 47 Part of the safety valve 15.

Both at the downwardly extending channel 40 for connecting the Heating return as well as on the connecting piece 42 are respectively Cross channels connected by means of the shut-off valves 16 and 17 are closable. These channels are connected via a line 18 with each other connected, which is designed as a separate component. The shut-off valve 16 can due to the horizontal nozzle both for filling the system via the line 18 and the open valve 17 as also serve to drain the system after removing the line 18. The conduit 18 is mounted so that it can be removed by hand without tools is so that it can be removed or inserted as needed.

Seen from the front left side of the pump housing component 24 subsequent fitting housing 25 also has a substantially cylindrical or stepped cylindrically shaped insertion space 48, whose longitudinal axis parallel to the impeller axis 28th is arranged. This insertion space 48 serves to receive the 3/2-way valve 9, which is in the form of a slide-in fitting, which can be inserted from the front into the insertion space 48 and by means of a bayonet connection is sealingly lockable. Which the insertion space 48 final bayonet connection is identical to that for the insertion space 29, so that the same end cover can be used.

The insertion fitting 49 has, as best seen in Fig. 6, two sealing seats, which in each case can be closed by a sealing body are. The sealing bodies are arranged on a parallel to the impeller axis 28 Rod 50 and are aligned and arranged so that they always close to flow direction, with the movement of the Rod 50 in a direction of a sealing body to its sealing seat too moved and the other is lifted off this or in the opposite direction in the opposite way.

The rod 50 is actuated by a lever 51, which is pivotable is arranged in a mounting fitting 52 which in an upwardly open Insertion space 53 is incorporated, which has an opening to the insertion space 48 has. In this way, the lever 51 with a End of the sealing body bearing rod 50 and with his other End to a spindle 54 attack by a motor 8 depending on Rotary position is extended more or less far. The installation fitting 52 includes the lever 51, the spindle 54 and the motor 8 and is from above into the insertion space 53 under inclusion of an elastic and sealing cuff 56 used. This cuff seals the passage of the lever 51 without its mobility to hinder. In addition, the installation fitting 52 in addition still sealed by O-rings relative to the insertion space 53 be.

To one side of the valve 9, namely in the front region of the insertion space 48 closes down a channel opening into port 19 57 for the heating flow. Laterally across to the insertion space 48 closes on the left side, in the area between the sealing seats of the Einschubarmatur 49 a channel on, in the aligned Connecting piece 58 opens, which for connecting the primary heat exchanger 2 coming line is provided. These lateral Connections 58 on the left side or formed by the discharge nozzle 31 Connection on the right side are arranged particularly advantageous because the in Built-in liner from above lines to or from the primary heat exchanger 2 are easy to connect, since they are in the transverse direction 27 feathers over their entire length and therefore easy to manipulate, d. H. away from the connection or to the connection are movable.

Also, the insertion space 48 has an opening on the bottom side a substantially coaxially extending back channel on, in a connection piece 59 for the plate heat exchanger. 5 empties. This lower connection piece 59 belongs to a pair whose upper connection piece 60 via a transverse channel 61 with a vertical downwardly extending channel 62 is connected to the port 21 opens for the domestic water supply. Through this channel arrangement Depending on the switching position of the valve 9, the line connection 58 either with the lower connection piece 59 for the plate heat exchanger 5 or with the connection 19 for the heating flow line-connected. Again, the insertion space 48 forms a connection base for almost all on this side of the pump leading Channels.

At the port 19 vertically downwardly extending channel includes a parallel to the impeller axis 28 extending rearwardly Channel 63, which together with the one with the transverse to it, opening into the channel region 63 and extending in the direction 27 Channel 64, the bypass line 13 forms. The transverse channel 64 opens in the lower rear of the pump housing, ie in the suction chamber the same, as can be clearly seen in Fig. 5.

In the channel 63, a spring-loaded valve 14 is inserted from behind, by the effective cross section of the bypass line 13 pressure-dependent is. On the vertical, leading to the terminal 21 channel 62 is towards the front a recording for another pressure-temperature sensor 45 provided. Recording and sensor are the same way formed like that of the right fitting housing 26. This pressure / Temperature sensor 45, which is inserted from the front, protrudes into the vertical and rear side channel 62, which is connected to the terminal 21 for the Domestic hot water supply leads. In this case, the pressure sensor is connected with an obstruction formed in the channel 62 part of the opening described above Flow meter 6, in conjunction with a corresponding Evaluation electronics, which is arranged in the terminal box 65.

For electrical connection of the unit is the terminal box 65th provided, which is arranged on the housing of the motor 30 and thus associated with the pump housing component 24.

The mechanical connection of the components 24, 25 and 26 takes place for one via the channel connections (see Fig. 3) (34, 64) and the other via corresponding connecting bridges, not described here in detail, which are secured by means of threaded bolts. Both Channel connections are plug connections below Integration of an O-ring, which the sealing function of the compound takes over and a transversely inserted to the insertion U-shaped Brackets, which takes over the mechanical lock.

The connections or connecting pieces described above are partly as plug-in connections, threaded connections or flange-like Neck formed. The respective designs are only examples understand and can be adjusted according to the requirements, be replaced or modified.

As illustrated particularly in FIG. 2, the one described above Unit extremely compact and lies on the side dimensions about in alignment with the plate heat exchanger arranged at the rear, so that the whole unit between vertical struts the chassis of the compact heating system is einliederbar, causing the Overall depth of the entire system can be reduced. Furthermore are all major units and fittings from the front or from the above the unit formed free space, so they be replaced and serviced without disassembly of the unit can. But even the replacement of the unit is due to the in a horizontal plane lying terminals 19 to 22, which the Make connection to the stationary water-carrying lines, in particular when using a central closure plate little laborious, it is only the lateral connection lines before to solve, after which the entire assembly after opening the closure plate lifted off to the top and then pulled out to the front can be. Installation is the reverse order.

The design of the pump housing component 24, in particular in the rear Part results in detail from Figures 10 and 11 and in built-in state of Figures 3 and 5. As these representations clarify, the actual pump housing is stepped backwards formed and extends below the plate heat exchanger 5, where from the right (seen from the front) of the suction channel 34 as well from the left of the transverse channel 64 for the bypass line 13 connects. This the heat exchanger 5 on its underside superior part 75 of Pump housing is upstream of the actual suction chamber and forms Part of an air separator, their actual separator 32 near the top and from an air separation chamber 70 as well as a vent valve 71 terminating at the top consists.

The separated by a plate 72 from the pressure chamber suction of the Pump discharges into the suction mouth 33, which in its upper area approximately over 190 ° from one from the plate 72 back to the housing wall extending upper guide body 73 is surrounded. To at the bottom is the suction mouth of a lower guide body 74 at a distance surrounded, the laterally and by far the lower ends of the upper Guide body 73 engages over and, also to the rear housing wall the pump housing member 24 protrudes, and in particular Fig. 10 illustrates, to the under the plate heat exchanger. 5 lying stepped housing portion 75. The arrangement of the guide body 73 and 74 is such that the entering from the suction passage 34 Flow shown in Fig. 11 and marked with arrows Must take away, namely the lower guide body 74 laterally below a direction change of about 180 ° flow around then among others Change direction of more than 90 ° in the suction mouth 33 to enter. In the area of this stepped housing portion 75 takes place for a flow reduction due to cross-sectional enlargement, which promotes Luftabscheidevorgang, on the other hand, a deflection about 180 ° with clearance up, which in turn the Outflow of air upwards from the flow favors. Through this Measures will be achieved that have a virtually bubble-free flow in enters the suction mouth and the entrained air in the suction chamber upwards rises where it is collected in the air separation chamber 70 and via the vent valve 71 in a conventional manner in the environment is excreted.

As can be seen in Fig. 10, the bypass channel 64 also opens in the Bottom of the suction chamber, under the lower guide body 74th

LIST OF REFERENCE NUMBERS

1 -

burner

2 -

Primary heat exchanger

3 -

Heat exchanger, radiator

4 -

pump

5 -

Plate heat exchanger

6 -

Flowmeter

7 -

Pressure and temperature sensor

8th -

servomotor

9 -

3/2-way valve

10 -

surge tank

11 -

heat storage

12 -

thermostatic valve

13 -

bypass line

14 -

Valve

15 -

safety valve

16 -

shut-off valve

17 -

shut-off valve

18 -

management

19 -

Connection for heating flow

20 -

Connection for heating return

21 -

Connection for domestic water supply

22 -

Connection for hot service water

23 -

unit

24 -

Pump housing component

25 -

Valve body left

26 -

Valve body right

27 -

transversely

28 -

wheel axle

29 -

Insertion space of the pump housing

30 -

engine

31 -

pressure port

32 -

air separator

33 -

saugmund

34 -

suction

35 -

channel

36 -

insertion space

37 -

Connection for heat storage

38 -

Connection for heat storage

39 -

partition wall

40 -

Line (heating return)

41 -

spigot

42 -

spigot

43 -

channel

44 -

admission

45 -

Pressure / temperature sensor

46 -

dirt separator

47 -

cover

48 -

insertion space

49 -

slide valve

50 -

Rod

51 -

lever

52 -

installation fitting

53 -

insertion space

54 -

spindle

56 -

cuff

57 -

channel

58 -

spigot

59 -

Connecting piece for heat exchanger (below)

60 -

Connecting piece for heat exchanger (top)

61 -

Querkanal

62 -

channel

63 -

Channel for bypass line

64 -

Cross channel for bypass line

65 -

terminal box

66 -

Connection for expansion tank

70 -

air separation chamber

71 -

vent valve

72 -

plate

73 -

upper guide body

74 -

lower guide body

75 -

stepped housing section

Claims (23)

Assembly unit (23) for a compact heating system with rear connections for a plate heat exchanger (5), with a pump housing (24) to which valve housing (25, 26) connect on both sides, wherein the pump housing (24) for receiving the impeller and for connecting the electric motor (30) is designed to be open at the front, characterized in that in each fitting housing (25, 26) is provided from the front accessible insertion space (36, 48) for receiving at least one valve and the insertion spaces (36, 48) each have a connection base for a connection piece (19, 20) of the heating system, a channel leading to the plate heat exchanger (5) and at least one further channel (35) or connection (37, 38, 44, 58, 66) form. Assembly according to claim 1, characterized in that each insertion space (36, 48) connects to the bottom of a plate heat exchanger (5) leading channel, wherein the channel in the insertion direction and to the connecting piece (41, 59) of the plate heat exchanger (5) extends. Assembly according to one of the preceding claims, characterized in that the insertion spaces (36, 48) each have a circular cross section, wherein the longitudinal axes of the insertion spaces are arranged parallel to the axis of rotation (28) of the centrifugal wheel. Assembly according to claim 1, characterized in that an insertion space (48) for incorporation of a switching valve (9), in particular a 3/2-way valve, is provided and formed. Assembly according to one of the preceding claims, characterized in that in a slide-in space (48) a switching valve (9) is incorporated as a plug-in unit (49), wherein the insertion unit (49) comprises the sealing seats and the or the sealing body. Assembly according to one of the preceding claims, characterized in that in the valve body (25) transversely to the insertion direction for the switching valve (9), a further, preferably accessible from above insertion space (53) for incorporation of the valve (9) controlling actuating means (8) is, which adjoins the insertion space (48) for the switching valve (9). Assembly according to one of the preceding claims, characterized in that the valve-side fitting housing (25) is provided a vertically downwardly directed channel (57) to a connecting piece (19) for the heating flow, preferably at the provided for the switching valve (9) insertion space (48) connects. Assembly according to one of the preceding claims, characterized in that adjoining the channel for heating flow a bypass channel (63), which preferably extends parallel to the insertion direction under the insertion space (48) and to the rear. Assembly according to one of the preceding claims, characterized in that the bypass channel (63) is formed open to the rear for receiving a control valve (14) for adjusting the effective channel cross-section. Assembly according to one of the preceding claims, characterized in that adjoins the insertion space (48) for the switching valve (9) laterally a channel with line connection (58) for a leading to a primary heat exchanger 2) line, preferably to the insertion direction and at the of the Pump facing away from the valve body (25). Assembly according to one of the preceding claims, characterized in that the insertion spaces accessible from the front (36, 48) can be closed by a bayonet-connectable insertion fitting or cover, wherein the insertion spaces (36, 48) preferably have identical bayonet joints. Assembly according to one of the preceding claims, characterized in that an insertion space (36) for receiving a dirt separator (46) is provided and formed. Assembly according to one of the preceding claims, characterized in that the insertion space (36) for the dirt separator (46) by means of a lid (47) is lockable, in which a safety valve (15) is incorporated. Assembly according to one of the preceding claims, characterized in that the cover (47) is formed integrally with a component of the valve integrated in the cover (15), in particular of the safety valve (15) and as a plastic injection molded part. Assembly according to one of the preceding claims, characterized in that the plug-in housing (36) accommodating the dirt separator (46) has two lateral connections (37, 38) for a heat accumulator (11) for storing heated heating water, which is provided with a dividable partition (39 ) are channel separated. Assembly according to one of the preceding claims, characterized in that the Schmutzabscheiderseitigen valve body (26) is provided a vertically downwardly directed channel (40) to a connection piece (20) for the heating return, preferably at the provided for the dirt separator (46) insertion space (36). Assembly according to one of the preceding claims, characterized in that at the provided for the dirt separator (46) insertion space (36) is preferably provided at the top of a connection (44) for incorporating a sensor (45). Assembly according to one of the preceding claims, characterized in that on the between the plug-in housing (36) and connecting piece (20) arranged for the heating return channel (40) is provided a lateral connection, which is lockable by means of a valve (16). Assembly according to one of the preceding claims, characterized in that the insertion space (36) for the dirt separator (46) has a bottom-side opening, which forms a fluid-conducting connection to a running in the direction of insertion channel to a connection piece (41) for the plate heat exchanger (5) , Assembly according to one of the preceding claims, characterized in that adjoining the insertion space (36) for the dirt separator (46) preferably in the bottom region of a leading to the suction side of the pump channel (35). Assembly according to one of the preceding claims, characterized in that the structural unit (23) has four downwardly outgoing connections (19-22) for connecting the compact heating system to the local heating and service water connections. Assembly according to one of the preceding claims, characterized in that the downwardly outgoing connections (19-22) lie in a horizontal plane. Assembly according to one of the preceding claims, characterized in that the outgoing outgoing terminals (15 - 22) are designed as plug-in connections, by lowering the assembly (23) downwards with the stationary lines are leitungsverbindbar and preferably lockable by a central closure plate.

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