DE29822781U1 - Device for a heating system, with a low loss header and with a heating circuit distributor - Google Patents

Abstract

The installation (1) comprising a hydraulic switch (2) and a heating circuit distributor (3) with switch housing (20) and distributor housing (30) together with all flow connections (23,24) is formed as a prefabricated integrated structural unit. On the switch side is only one forward flow connection (21) and one back flow connection (22) for connection with at least one heat producer in the primary circuit. On the distributor side are only two or more forward flow connections (33) and back flow connections (34) for connection with heat users in the secondary circuit.

Description

Description:

Equipment for a heating system, with a hydraulic separator and with a heating circuit distributor

The present invention relates to a device for a heating system, with a hydraulic switch for decoupling a heating primary circuit from heating secondary circuits and with a heating circuit distributor for the secondary circuits.

In recent years, condensing boilers have been increasingly used, particularly in single-family homes and separate apartments, to provide both the required heating heat and heated domestic water. In addition, modern heating systems are usually divided into several secondary heating circuits or heating circuits, with the heating water heated in the condensing boiler being distributed to the various heating circuits via a known heating circuit distributor. When there is a high heating requirement, the amount of water required on the secondary side to supply all heating circuits is relatively large, whereas the maximum possible heating water flow rate is limited to relatively small values in most condensing boilers for energy-saving reasons. In order to avoid problems in the heating system resulting from these differences, a hydraulic switch is often installed upstream of the heating circuit distributor in the heating system. The hydraulic switch decouples the primary circuit of the boiler from the secondary circuits.

and ensures that all secondary circuits are supplied with the required amount of heating water at a uniform temperature. Although the temperature in the secondary circuits is lower than the temperature of the heating water at the boiler's inlet, this is not a disadvantage in modern low-temperature heating systems.

In the current state of the art, heating circuit distributors and hydraulic separators are separate components, each of which is manufactured and installed separately. At the location of the heating system, the heating circuit distributor and the hydraulic separator are mounted separately on a wall or a support structure and then connected to each other and to the other parts of the heating system using suitable non-flexible or flexible pipe elements. This obviously makes installation complex and correspondingly expensive.

The object of the present invention is therefore to create a device for a heating system of the type mentioned at the outset which avoids the disadvantages outlined and in which, in particular, the installation is simplified and accelerated and thus also cheaper.

To solve the problem, a device of the type mentioned at the beginning is proposed, which is characterized in that the device consisting of hydraulic switch and heating circuit distributor with switch housing and distributor housing and all flow connections running between the two is designed as a prefabricated integrated unit and on the switch side only has one flow connection and one return connection for connection to at least one heat generator provided in the primary circuit and on the distributor side only two

■5 3·— * ■ » · ··

or more flow connections and return connections for connection to heat consumers provided in the secondary circuit.

The integrated design has the advantage that the number of pipe connections that have to be made on site is significantly reduced. This also reduces the risk of leaks when making the corresponding pipe connections, because prefabrication can usually be automated, whereas on-site installation often involves limited space, which makes work, particularly welding or soldering, more difficult. In addition, the integrated unit is easier to install, because now only one component has to be held, whereas previously two separate components had to be held separately. Another advantage is that a specific hydraulic switch can now be assembled in advance with a specific heating circuit distributor to form the integrated unit, whereby the two parts can be optimally coordinated with one another, because the manufacturer of the components always has this expertise, whereas this cannot always be assumed to a sufficient extent among heating installers.

A first development of the device according to the invention provides that the switch housing is vertically aligned, that the heating circuit distributor is a combined flow and return distributor with a single horizontally aligned housing divided into flow and return areas on the inside, and that the two housings are connected to each other at right angles directly and/or via at least one rigid pipe section, preferably welded. The individual parts of the device retain their usual shape and are easy to install on site.

a. ~ m a m &Lgr;&Lgr; » &Lgr; » &Lgr; 4

expensive, familiar arrangement and alignment, so that no adjustment is required on the part of the installer but work can continue in the usual way.

An alternative design of the device according to the invention provides that the switch housing is vertically aligned, that the heating circuit distributor is a combined flow and return distributor with a single vertically aligned housing divided into flow and return areas on the inside, and that the two housings are directly connected to one another, preferably welded, so that they run parallel to one another. This design of the device achieves a particularly compact construction, which also saves material because a wall of either the heating circuit distributor or the hydraulic switch can be omitted. With this design of the device, the flow and return connections for the secondary circuits are no longer next to one another as usual, but vertically one above the other, but this change can be taken into account when planning the pipe route, particularly when setting up new heating systems, so that no additional work is caused during installation.

A further contribution to achieving low manufacturing costs in the manufacture of the device is that at least the flow connection from the hydraulic switch to the flow area of the heating circuit distributor is formed by a simple opening in an area in which the two housings are directly adjacent to one another.

It is also planned that the feed pipe opens into the switch housing at a higher level than

r -5.-

the flow connection between the hydraulic switch and the flow area of the heating circuit distributor and that a gas collection chamber with a venting nozzle and/or valve is provided above the inlet of the flow nozzle in the switch housing. With this design of the device, the hydraulic switch can also take on the function of an air separator, meaning that a corresponding component in the heating system no longer has to be provided separately. Since the flow rate of the heating water within the hydraulic switch is relatively low and since the flow is also absolutely laminar, effective venting or degassing is guaranteed, so that functional impairments of the heating system due to air or gas bubbles carried in the heating water are avoided.

It is also proposed that the return pipe opens into the switch housing at a lower level than the flow connection between the return area of the heating circuit distributor and the hydraulic switch, and that a sludge collection chamber with a blow-down pipe and/or valve is provided below the inlet of the return pipe in the switch housing. Since the flow rate of the heating water is also low in the lower area of the hydraulic switch and the flow is laminar, sludge carried along in the return water from the heating circuits can settle and collect in the lowest area of the hydraulic switch, without there being a risk that the sludge will be stirred up and re-enter the water circuit. This protects the relatively sensitive circulation pump in particular from wear caused by sludge carried along. In addition, this property of the device according to the invention means that a separate water filter within the heating system can be saved.

4*6 '-

In order to ensure the desired, relatively low flow velocity in laminar flow conditions within the hydraulic switch without the hydraulic switch requiring too large a construction volume, it is preferably provided that the flow cross-section of the switch housing is four to ten times as large as the flow cross-section of the flow connection and the return connection.

In order to simplify the manufacture and also the accommodation of the device, it is also preferred that the switch housing and the distributor housing are designed with the same depth measured in the horizontal direction.

To make the work of the on-site installer easier, it is recommended that at least one bracket connection element is attached to the outside of the switch housing and/or the distributor housing to connect the device to a support bracket. The associated support bracket is preferably attached in advance to a building wall near the boiler if no cables have been laid there yet, so that there is still sufficient space for the work required to attach the support bracket. To attach the device itself, it is then sufficient to simply hook the bracket connection elements into the support bracket, which is also possible without any problems in confined spaces.

In order to minimize heat losses in the area of the device, it is finally proposed that it comprises a two- or multi-part heat insulation body that encloses at least the two housings in a form-fitting manner.

In the following, an embodiment of the invention is explained with reference to a drawing. The figures of the drawing

show:

Figure 1 shows a device for a heating system with hydraulic switch and heating circuit distributor in view,

Figure la shows the detail of the furnishings circled in Figure 1, but now in section, and

Figure 2 shows the device according to Figure 1 in plan view, partly broken away.

As shown in Figure 1 of the drawing, the embodiment of the device 1 shown here consists of a hydraulic switch provided in the left part and a heating circuit distributor 3 arranged to the right of it, whereby switch 2 and distributor 3 form an integrated unit. A version with the sides swapped can of course also be manufactured in order to take different local conditions into account.

The hydraulic switch 2 is designed with a switch housing 20 running vertically, which can be formed by a rectangular steel tube. From the left, a flow connection 21, which is to be connected to a heating boiler, opens into the upper area of the switch 2, through which hot heating water can be introduced into the switch 2. Close to the lower end of the switch 2, a return connection 22 opens out of it, which is also to be connected to a heating boiler and through which cool return water can be fed to the heating boiler. The interior of the hydraulic switch 2 is completely free of built-in components; in addition, the flow cross-section of the switch 2 is several times larger than the flow cross-section of the flow connection 21 and return connection 22, so that relatively low flow velocities and laminar flow conditions in the heating water are achieved inside the switch 2.

■* 8 —

ser are guaranteed.

In the present embodiment of the device 1, the housing 20 of the hydraulic switch 2 is directly and firmly connected, preferably welded, to a housing 30 of the heating circuit distributor 3 on its right-hand side in Figure 1. The housing 30 also consists of a rectangular tube, but here, which is not visible in Figure 1, the interior is divided into a flow area and a return area. This will be explained in the description of Figure 2.

The direct connection between the distributor housing 30 and the switch housing 20 is at a height that is slightly lower than the inlet of the flow connection 21. In addition, the heating circuit distributor 3 is connected to the lower area of the hydraulic switch 2 via a flow connection, here a rigid pipe 24, with the inlet being slightly higher than the outlet of the return connection 22. On the distributor side, the pipe 24 is connected to the return area. In the area of the direct connection between the distributor housing 30 and switch housing 20 there is a flow connection connecting the interior of the hydraulic switch 2 to the flow area 31 of the heating circuit distributor 3, here in the form of a simple opening 23.

On the top of the housing 30 of the heating circuit distributor 3, as is known per se, several pairs of flow connections 33 and return connections 34 for different heating circuits are attached, to which the corresponding pipes can be connected. In accordance with the standard, the flow is on the right and the return is on the left within each pair of connections.

For mounting the integrated unit consisting of switch 2 and distributor 3 on a building wall in the

In the position area of the heating system, two bracket connection elements 36 are attached to the underside of the distributor housing 30, with which it is possible to easily hang the device 1 in a support bracket (not shown here) that has been previously mounted, for example, on a building wall.

The upper end area of the housing 20 of the hydraulic switch 2 serves as a gas collection chamber 25, from which any gas that has accumulated there can be removed via a vent nozzle 25'. A connection nozzle 26 attached to the upper face of the housing 20 serves to accommodate a sensor for temperature measurement if required.

The lower end area of the hydraulic switch 2 is designed as a sludge collection chamber 27, from which, if required, accumulated sludge can be removed via a blow-off nozzle 27'.

Finally, a connection piece 35 is provided on the underside of the housing 30 of the heating circuit distributor 3, which serves to accommodate a sensor for temperature measurement if required. Depending on the design of the associated heating system control, a temperature sensor can be installed either in the connection piece 26 in the primary circuit or in the connection piece 35 in the secondary circuit. The connection piece 26, 35 that is not required in each case is closed with a plug.

When a heating system belonging to the facility 1 is in operation, heated water flows through the flow connection 21 in a heating boiler (not shown), e.g. a condensing boiler, into the upper area of the hydraulic separator 2. From there, the hot heating water flows through the opening 23 into the flow area of the heating circuit distributor 3 and is distributed from there to the flow connections 33 in order to be fed to various radiators or other

- 10 -

other heating devices, such as underfloor heating or wall heating. Cooled heating water returning from the heating devices passes through the return connections 32 into the return area of the heating circuit distributor 3 and from there is collected through the pipe 24 into the lower area of the hydraulic switch 2. From the lower area of the hydraulic switch 2, the cool heating water is fed back to the boiler through the return connection 22 for reheating. If the amount of water required in the heating circuits is greater than the maximum heating water flow rate of the boiler, part of the return water flows upwards from the lower area of the hydraulic switch 2 according to the dashed arrows and then through the opening 23 back into the flow area of the heating circuit distributor 3, whereby a lower temperature level is set here by the water mixture than in the boiler flow, although this temperature is still high enough for heating purposes. This ensures that all heating circuits have water available in sufficient quantity and temperature without a correspondingly high water flow rate in the boiler being required.

Figure la shows an enlarged view of the connection area Y-Y between the switch housing 20 and the distributor housing 30, circled in Figure 1, where the two housings 20, 30 are welded together. From the inside of the distributor housing 30, the flow area 31 is visible, into which the heated heating water flows according to the flow arrow drawn in full in Figure 1. If required, cooler return water also flows from below into the flow area 31, as indicated by the dashed arrow in Figure 1.

- 11 -

-i 11. -

Figure 2 of the drawing shows the device 1 from Figure 1 in plan view, with the heating circuit distributor 3 shown broken away over a large part of its length in order to make its interior visible.

In the left part of Figure 2, the view falls on the upper front side of the hydraulic switch 2 with its housing 20, with the connection piece 26 for a temperature sensor located on the top of the front side. To the left of the housing 20, the venting piece 25' and below that the larger flow piece 21 point away.

The housing 30 of the heating circuit distributor 3 extends to the right from the housing 20 of the hydraulic switch 2, whereby Figure 2 makes it particularly clear that the housings 20, 30 are designed with the same depth measured in the horizontal direction, which simplifies production. The opening 23 connects the interior of the switch housing 20 with the flow area 31 of the heating circuit distributor 3. Its interior is divided into the flow area 31 and the return area 32 by a partition wall 30'. As is already known, the partition wall 30' here runs in the form of an approximate sine wave, whereby particularly favorable flow conditions are achieved in the area of the transitions to the flow connections 33 and the return connections 34.

In the background, concealed by the housing 30 in its left end area, is the pipe 24, which forms the return connection from the heating circuit distributor 3 to the hydraulic switch 2. Also concealed by the housing 30 are the console connection elements 36 shown in dashed lines on its underside.

Claims (1)

Protection claims: Device (1) for a heating system, with a hydraulic switch (2) for decoupling a heating primary circuit from heating secondary circuits and with a heating circuit distributor (3) for the secondary circuits, characterized in that the device (1) consisting of hydraulic switch (2) and heating circuit distributor (3) with switch housing (20) and distributor housing (30) and all flow connections (23, 24) running between the two is designed as a prefabricated integrated structural unit and on the switch side only has one flow connection (21) and one return connection (22) for connection to at least one heat generator provided in the primary circuit and on the distributor side only two or more flow connections (33) and return connections (34) for connection to heat consumers provided in the secondary circuit. Device according to claim 1, characterized in that the switch housing (20) is vertically aligned, that the heating circuit distributor (3) is a combined flow and return distributor with a single horizontally aligned housing (30) divided internally into flow and return areas (31, 32), and that the two housings (20, 30) are connected to one another directly and/or via at least one rigid pipe section, running at right angles to one another. connected, preferably welded. 3. Device according to claim 2, characterized in that the switch housing (20) is vertically aligned, that the heating circuit distributor (3) is a combined flow and return distributor with a single vertically aligned housing (30) divided internally into flow and return areas (31, 32), and that the two housings (20, 30) are directly connected, preferably welded, to one another, lying against one another and running parallel to one another. 4. Device according to claim 2 or 3, characterized in that at least the flow connection (23) from the hydraulic switch (2) to the flow area (31) of the heating circuit distributor (3) is formed by a simple opening in an area in which the two housings (20, 30) lie directly against one another. 5. Device according to one of the preceding claims, characterized in that the flow connection (21) opens into the switch housing (20) at a higher level than the flow connection (23) between the hydraulic switch (2) and the flow area (31) of the heating circuit distributor (3) and that a gas collection chamber (25) with a vent connection (25') and/or valve is provided above the opening (21') of the flow connection (21) in the switch housing (20). 6. Device according to one of the preceding claims, characterized in that the return pipe (22) opens into the switch housing (20) at a lower level than the flow connection (24) between the return area (32) of the heating circuit plate (3) and the hydraulic switch (2) and that below the inlet (22') of the return connection (22) in the switch housing (20) a sludge collection chamber (27) with blow-down connection (27') and/or valve is provided. 7. Device according to one of the preceding claims, characterized in that the flow cross-section of the switch housing (2) is four to ten times as large as the flow cross-section of the flow connection (21) and the return connection (22). 8. Device according to one of the preceding claims, characterized in that the switch housing (20) and the distributor housing (30) are designed with the same depth measured in the horizontal direction. 9. Device according to one of the preceding claims, characterized in that at least one console connection element (36) for connecting the device (1) to a support console is attached to the outside of the switch housing (20) and/or the distributor housing (30). 10. Device according to one of the preceding claims, characterized in that it comprises a two-part or multi-part heat insulation body which encloses at least the two housings (20, 30) in a form-fitting manner.