EP4108998A1

EP4108998A1 - Monolithic heating station with by-pass

Info

Publication number: EP4108998A1
Application number: EP22165904.8A
Authority: EP
Inventors: Luka OMEJC; Franci STUPICA; Simon URBAS; Martin Lynder FRANCK; Matej VOLK
Original assignee: Danfoss AS
Current assignee: Danfoss AS
Priority date: 2021-06-24
Filing date: 2022-03-31
Publication date: 2022-12-28
Also published as: CN115523531A

Abstract

The present invention relates to a heating station (500) adapted to be connected to a supply and consuming network and comprising a monolithic main part (1) adapted for a heat exchanger (2) to be connected to first flow paths(3) formed within said main part (1), where said heating station (500) is provided with a by-pass (24) adapted to be opened and closed and positioned between the main part (1) and the supply and consuming network.

Description

BACKGROUND

The patent application relates to a heating station which is capable of being linked to between supply network and a consuming network. The supply network could include a district-heat network and as adapted to supply heat to the consumer network which comprises at least one heat-consumer.
Such a heating station is traditionally formed of a platform with pipes connecting a heat exchanger to couplings to the supply and consumer networks. Operative devices such as valves, heat meters, thermostats, thermal sensors etc. could be connected to the pipes to set and monitor flows and fluids within the heating station.
Producing such a heating station however is time consuming as each individual pipe section and operative device are to be connected and possible connected by threaded couplings. This increases cost and production time, just as it increases the number if individual parts to be produced and connected.
The object of the present invention is to introduce a heating station that is easier and cheaper to produce, but still is versatile in the sense that it is easily adaptable to individual requirements.
During e.g. summer, when it is warm and the heating installations like radiators and floor heating systems are closed, no, or little, heated domestic fluid and heating fluid are flowing in the supply and consuming networks. This gives standing fluids that would cool over time, this increasing the required time to obtain a requested temperature, ones opened again. Further, it increases the risk of e.g. legionella.
If e.g. a main part of the heating station is a standard produced monolithic unit, it may not be easy to connect such a by-pass.
The object of the present invention is to introduce a solution to such problems, e.g. to ensure a possible connection of a monolithic station to any supply and consuming network.

SUMMARY OF THE INVENTION

The object is solved according to the solution given in the claims.
This includes to introduce a heating station adapted to be connected to a supply and consuming network and comprising a monolithic main part adapted for a heat exchanger to be connected to first flow paths formed within said main part, where said heating station is provided with a by-pass adapted to be opened and closed and positioned between the main part and the supply and consuming network.
The by-pass may neither coupled to or in contact to the main part the supply and consuming network but is positioned between these.
The heating station may be adapted to be connected to the supply and consuming network via an interconnection device adapted to be positioned between the main part and the supply and consuming network heating flow circuit pipes, wherein the interconnection device is formed of holding means fixing a set of interconnecting conduits adapted to couple first flow conduits within the main part to the supply and consuming network heating flow circuit pipes, and where the interconnecting conduits are adapted for flow devices, such as valves, flow sensors and pumps, to be positioned between the main part and the supply and consuming network heating flow circuit pipes, and where said by-pass is connected to said interconnection device.
This interconnection devices enables the connection of flow devices not adaptable for the heating station, such as valves, flow sensors etc., where these then are positioned between couplings to respectively the heating station couplings and the couplings to the pipes of the supply and consuming networks.
The interconnecting conduits may be pipe sections whereto the devices can be attached.
At least some of the interconnection conduits may be formed of sections where at least one section can be replaced by a flow device.
The by-pass could be positioned on the interconnection device before or after a replaceable section seen relative to the side to be closest to the main part.
The interconnecting device holding means may be formed as a rail and comprises two parts extending in a lengthwise direction at a distance from each other, and each adapted to fixate the interconnecting conduits at a position.
The interconnecting conduits may be formed with different coupling means at the end to be coupled to the main part compared to the coupling means at the end to be coupled to the supply and consuming network heating flow circuit pipes.
This enables that the heating station couplings need not match the couplings of the pipes of the supply and consuming networks.
At least two of the interconnecting device interconnecting conduits may intersect each other.
This enables that the heating station couplings need not match the position of the pipes of the supply and consuming networks.
The by-pass may be adapted for a sensor to be connected, such as a temperature sensor or an energy measuring device.

FIGURES

Fig. 1: Main part of a heating station according to the present invention
Fig.2A: Illustration of a receiving space with an inner edge
Fig. 2B: Illustration of the receiving space with an inner edge and a valve inserted into the receiving space using the inner edge as valve seat
Fig. 2: Illustration of the main part with a heat exchanger, a interconnection device and an additional module.

DETAILED DESCRIPTION OF THE INVENTION

It should be understood, that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from the detailed description.
Fig. 1 illustrates a part of a heating station, or unit, defining a monolithic main part (1) that is at least predominately formed as a single body. The 'single body' is defined in the manner that after production it is not formed a plural parts adapted to be connected together, but may be formed of a plural of parts being fixed during production by welding, gluing etc, or e.g. moulded (like injection moulding) or cast as a single body, or e.g. 3D printed or produced on other suitable manners. The main part (1) may be formed of cast iron, red cast iron, aluminium or various plastics or other non-metal materials, or may be formed as a combination thereof.
Such a heating station is adapted to be positioned between supply network and a consuming network. The supply network supplies a heating fluid and a domestic fluid (usually fresh water). The heating fluid could from a plant of any kind, for example cogeneration plant burning fossil fuels or biomass, heat-only boiler stations, geothermal heating, heat pumps and central solar heating etc. The consuming network may be for residential heating and usually includes a fluid circuiting system, such as for supplying heat in domestic living spaces, houses etc. Such a residential heating system may include radiators, floor heating systems, showers, water taps etc. The supply and the consuming networks usually are formed of a system of metal pipes.
The main part (1) of the heating station is formed with a position adapted for a heat exchanger (2) to be fixed at a position and connected by coupling means (not shown) to a set of first coupling ports (5).
The set of first coupling ports (5) connects to a set of first flow conduits (3) formed within said main part (1) and though these to a set of second coupling ports (6).
At least some of the first (3) flow conduits may be formed with receiving spaces (10) in fluid connection to the flow paths (3). The receiving spaces (10) are adapted for specialized flow devices (25) to be inserted into said receiving spaces (10), e.g. valve assemblies, flow sensors or pumps etc. By 'specialized' is referred to the flow devices (25) being specially adapted to be inserted into such receiving spaces (10) but may not necessarily be adapted to be connected to a pipe of the consumer network.
Such a receiving space (10) thus forms part of a flow path (3) splitting it in subparts. Each subpart is fluidically connected to the inner volume of the receiving space (10) by an opening (4a, 4b) in the receiving space (10) inner wall, and the receiving space inner volume forms part of the respective flow path (3). When e.g. a valve (25) is inserted into said receiving space (10), the valve is adapted to regulate the flow passage formed within the inner volume between the two openings (4a, 4b) and thereby the flow rate.
The specialized devices (25) may in themselves be fully operational units, understood in the sense, they do not require other parts to operate. In the example of the specialized device being a valve (25), it comprises all the parts to be able to operate as a valve. Alternatively, the specialized devices (25) functions as insert elements, such that they can only function when operating in combination with the receiving space (10). Again, taking a valve as example, it could be operating together with the inner wall of the receiving space (10), e.g. by operating with the inner wall, or a section thereof, as the valve seat. The flow then could pass at the outside of the valve, the valve formed with a closing element adapted to operate in connection to the inner wall to define a valve opening.
In one example, a receiving space (10) is formed with an inner edge (11) visible on fig. 2A and 2B showing side view of a receiving space (10) where an inner edge (11) is formed between the first opening (4a) the flow path section (3a) and a second opening (4b) of the flow path section (3b). Fig. 2A shows a free receiving space (10), whereas a in fig. 2B a valve (25) is inserted operating with the inner edge (11) as valve seat.
In an alternative or additional embodiment, the inner edge (11) operates as end stop for the insertion of the specialized device (25), which in the additional embodiment could be combined with the functional corporation of the specialized device (25), such as being valve seat for a valve.
One set of flow paths (3), and the associated set of first couplings (5), may be adapted to connect a heating fluid supply and return to the heat exchanger (2). A set of second flow pats (3), and associated set of first couplings (5), may be adapted to connect a domestic fluid supply and return to the heat exchanger (2). The heating fluid passes one flow path within the heat exchanger (2), often referred to as the primary path, then exchanges heat with the domestic fluid (e.g. water) passing a heat exchanger second (2) flow path, often referred to as the secondary path. In one embodiment, the heating fluid has a higher temperature than the domestic fluid. The domestic fluid therefore is heated and can be used either to supply heat to e.g. radiators or floor heating installations, or to water taps or showers. In another embodiment, the domestic fluid is being cooled by the heating fluid.
How the first openings (5) are connected to the heat exchanger (2) may be a matter of the design of connected heat exchanger (2). Different first openings (5) could be connected as inlet or outlet to respectively the primary or secondary path if another heat exchanger (2) is connected or it is oriented differently.
The first coupling ports (5) and/or any of the second (6), third (7) and fourth (8) set of coupling ports may be proved with quick couplings. In the present context this is coupling which replace threaded or flanged connections requiring wrenches. In an embodiment, either the coupled part or the coupling port (5, 6, 7, 8) is formed with a first coupling part defining an outer recess and the other is formed with a second coupling part defining openings. During coupling, the first coupling part is positioned within the first coupling part such that the openings aligns with the outer recess. A fixation part then is inserted in openings and the recess to fix the parts together. Sealings means may also be inserted, or form part of the first or second coupling part. In one embodiment, the fixation part is adapted to be fixed further to the main part (1) e.g. by bolt and nuts or screws, or by other fixation means.
The main part (1) may comprise a receiving space (10a) connected to at least two different flow paths (3). A diversion valve (25) inserted then could direct the fluid flow in two directions for double use of the fluid.
At least one receiving space (10c) may formed with a pressure section (10d) that could be positioned in any way in relation to the pressure section (10b) and may simply be a part of it. The pressure section (10d) is in fluid connection to the receiving space (10) and is adapted for the insertion of a pressure responsive element. In the present definition, the pressure responsive element is adapted to react according to a change in a differential pressure to adjust a pressure responsive valve element. This could e.g. be formed as diaphragm separating two pressure chambers, each in fluid communication to different positions in the flow circuits formed of the flow paths (3). The diaphragm is connected to the pressure responsive valve element, and when the pressure difference at the two different positions changes, the diaphragm deflects and the pressure responsive valve element translocate relative to a valve seat, until a new equalization is obtained.
A fluid connection via a pressure conduit (18) may be formed in the main part (1), to form pressure communication between the pressure section (10c) and a position of a flow path (3). In the illustrated embodiment, the pressure conduit (18) connects to a flow path (3) also connected to the receiving space (10b). This enables the pressure responsive element to regulate the differential pressure over a valve (25) in the receiving chamber (10b), the other pressure communication possible being via the fluid communication between the pressure section (10c) and receiving chamber (10b).
At least one flow path (3) may form two sections not connected to each other, and each with an access opening (12) adapted for a connection device (not shown) to connect them fluidically. The access openings (12) are adapted to couple to said connection device, which e.g. could be selected among a flow regulation valve, a pressure control valve, a flow sensor, or a tube section. The access openings (12) therefore may differ from the receiving chambers (10, 10a) in that the connection device is not to be inserted into a receiving chamber, but rather are to be connected to the main part (1) outside. Another difference is, that flow only can pass between the two access openings (12) via the connection device.
The main part (1) may be provided with means for the connection device to be fixed to the main part (1), such as by screws, bolts or by other fixation means. The access openings (12) may also be provided with coupling means such as the other coupling ports (5, 6, 7, 8, 9), possible of the same kind.
The set of second coupling ports (6) is adapted for connecting the main part (1) to an additional module (100), as is illustrated in fig. 3. The additional module (100) could include any of the features as the main part (1) and could in one embodiment be essentially a main part (1) construction itself.
The additional module (100) as a minimum includes at least one module flow path (103) to be connected the at least one flow path (3) of the main part (1) via second module coupling ports (107). The second module coupling ports (107) are adapted to be coupled to the set of third coupling ports (7) of the main part (1).
The set of third coupling ports (7) of the main part (1) in the illustrated embodiment, is shown to connect to a flow path (3) adapted to connect to the heat exchanger (2). The heat exchanger (2) then could be position such that the additional module (100) forms part of the network of heated domestic fluid, enabling it e.g. to be connected to floor heating installations etc. The main part (1) then could provide the coupling ports (6) for a radiator installation circuit and the additional module (100) provides a set of first module coupling ports (106) to provide connection to additional installations - like floor heating.
Module flow paths (103) formed in the additional module (100) connects the set of first module coupling ports (106) to the set of second module coupling ports (107), and optionally to a set of third module coupling ports (117) adapted to connect to a further additional module (100).
The set of first module coupling ports (106) comprise a port to connect to a supply line of the consumer network connected e.g. a floor heating installation, and port a to connect to the return line. Each of the ports in the set of first module coupling ports (106) is connected to a port in the second set module coupling ports by a module flow paths (103).
The module flow paths (103) could comprise any of the receiving spaces (10, 10a, 10b, 10c, 110, 110a) etc like the main part (1), where some (110a) could be for diversion valves to allow some of the flow to pass through a further additional module (100) connected by the set of third module coupling ports (117).
The additional module (100) in an embodiment itself may be monolithic formed of a single body in the same manner as the main part.
The main part (1) could include a set of fourth coupling ports (8) allowing it to be coupled to a second additional module (100). They could be connected to different flow paths (3) relative to the set of third coupling ports (7). In one embodiment the third coupling ports (7) is adapted to circuit a heated domestic fluid (in a connected heat exchanger (2)), whereas the fourth coupling ports (8) are adapted to circuit the fresh domestic fluid, such as cold water, not circuited in the heat exchanger (2).
The set of second coupling ports (6) may include a port be adapted to connect to a supply network supply line of heating fluid, and a corresponding port to connect to a return line. A port may be adapted to connect to a supply network supply line of domestic fluid (e.g. cold water), and a corresponding port to connect to the consuming network to feed heated domestic fluid after it has passed the heat exchanger (2). A domestic bypass flow path (3a) may connect the port to be connected to a supply line of domestic fluid, and a port to return domestic fluid before it has passed the heat exchanger (2). This is to allow the supply of e.g. cold water to shower and water taps, where it possible could be mixed with the heated domestic fluid.
An appropriate number of receiving spaces (10a) adapted for a diversion valve may be positioned to ensure right proportions of flow to respective the first (5), third (7) and fourth (8) coupling ports.
Any of the first (5), third (7) and fourth (8) coupling ports could be adapted to be closed by a plug (not shown) if not to be used.
Fig. 3 shows a heat exchanger (2) being coupled to the main part (1) and the set of first coupling ports (5) are shown by dashed lines to illustrate they are positioned underneath the heat exchanger (2) and thus are being seen through this.
As indicated the set of second coupling ports (6) and set of first module coupling ports (106), are adapted to connect the supply and consuming networks. However, such installations usually are installed with a traditional coupling formed of sets of windings. When the heating station including the main part (1) and possible additional modules (100) are formed of other materials, such as composites or plastics, it may not be sustainable using such winded connections.
The heating station therefore is adapted to include an interconnection device (200). The set of second coupling ports (6) thus may be adapted to connect to interconnection device (200), which then is to be positioned between the heating station and supply and consuming networks.
The interconnection device (200) is formed of holding means (210) fixing a set of interconnecting conduits (220). The interconnecting conduits (220) at one end are formed with a set of first interconnection couplings (230) adapted to be coupled to the set of second coupling ports (6) and optionally the set of first module coupling ports (106). At the other end the interconnection conduits (220) are formed with a set of second interconnection couplings (240) adapted to be coupled to the supply and consuming networks, such as to their pipes.
The interconnecting conduits (220) are adapted for flow devices (225), such as valves, flow sensors and pumps, to be positioned between the heating station and the supply and consuming networks.
There may be at least two holding means (210) that may be formed as rails interconnecting a plural of pipes (220) being the interconnecting conduits (220). The plural of pipes (220) then could be connected to the rail at two positions to fixate them.
At least some of the interconnecting conduits (220) may be formed as pipe sections (221, 222) whereto the flow devices (225) can be attached. The pipe sections (221, 222) then is adapted such that an installer can replace a section (221, 222) with a flow device (225).
This offers an additional advantage. Where the heating station formed of a main part (1) and possible additional modules (100) is adapted for specialized flow devices (25), that is specially adapted for e.g. insertion into receiving spaces (10, 10a, 10b, 10c, 110, 110a), the installer may wish to use other products, e.g. reuse old ones, use their own products etc. The interconnecting device (200) then offers the possibility to install these rather that installing specialized flow devices (25) in the heating station, or in addition to these.
The interconnecting conduits (220) may be formed with a different kind of set of first interconnecting coupling ports (230) compared to the set of second interconnecting coupling ports (240). The coupling of the set of first interconnecting coupling ports (230) would be adapted to couple to the set of second coupling ports (6) and set of first module coupling ports (106). The set of second interconnecting coupling ports (240) would be adapted to be coupled to the supply and consuming networks and could e.g. be provided with traditional threaded connection to connect to the supply and consuming network pipes.
The interconnecting conduits (220) may be formed of more traditional metals for such heating pipe systems.
At least two of the interconnecting conduits (220) may intersect each other, allowing to adapt to different local relative positioning of the pipes in the supply and consuming networks relative to the position in the heating station.
During e.g. summer, when it is warm and the heating installations like radiators and floor heating systems are closed, no, or little, heated domestic fluid and heating fluid are flowing in the supply and consuming networks. This gives standing fluids that would cool over time, this increasing the required time to obtain a requested temperature, ones opened again. Further, it increases the risk of e.g. legionella.
For this purpose, a by-pass (300) is positioned connecting the heating supply and heating return conduit of the supply network, and where the by-pass (300) is adapted to be opened and closed. In one embodiment the by-pass (300) is opened at regular intervals, e.g. during summer, and in another embodiment is opened for a small fluid to flow continuously.
Such by-passes (300) are known in general, but in the present invention it is installed at the interconnection device (200), and thus between heating station and possible additional module (100) set of second coupling ports (6) and set of first coupling ports (106), and the couplings of the supply and consumer networks.
Any of the openings, such as the first, second, third, fourth and set of fifth coupling ports (5, 6, 7, 8, 9) or the receiving spaces (10, 10a, 10b, 10c, 110, 110a), are adapted to be closed if not in use. In one embodiment, rather than connecting them to a flow pipe or a device like a specialized flow device (25) or heat exchanger (2), they are adapted to be closed by insertion of a plug (not illustrated). The plug may be inserted such that e.g. the inner openings (4a, 4b) in the inner wall of the receiving spaces (10) are not closed, only the opening towards the externals.
In an embodiment a plug is formed such that it only closes one of the inner openings (4a, 4b) but not the other, leaving this opening free to be coupled to a further device. In this embodiment the plug then may be adapted as a coupling to the device.

References:

1 -: Monolithic main part
2 -: Heat exchanger
3 -: First flow conduits
3a -: Domestic bypass flow path
4a, 4b -: Openings
5 -: First coupling ports
6 -: Second coupling ports
7 -: Third coupling ports
8 -: Set of fourth coupling ports
10 -: Receiving spaces
10a -: Receiving space
10b -: Receiving space
10c-: Pressure section
11 -: Edge within an inner receiving space
12 -: Access opening
18 -: Pressure conduit
20 -: Access opening
25 -: Specialized flow devices
100 -: Additional module
103 -: Module flow paths
110 -: Receiving spaces
106 -: First module coupling ports
107 -: Second module coupling ports
117 -: Third module coupling ports
200 -: Interconnection device
210 -: Holding means
220 -: Interconnecting conduits
221 -: Pipe section
222 -: Pipe sections
225 -: Flow devices, such as valves, flow sensors and pumps
230 -: First interconnection couplings
240 -: Second interconnection couplings
300 -: Bypass

Claims

A heating station (500) adapted to be connected to a supply and consuming network and comprising a monolithic main part (1) adapted for a heat exchanger (2) to be connected to first flow paths(3) formed within said main part (1), where said heating station (500) is provided with a by-pass (24) adapted to be opened and closed and positioned between the main part (1) and the supply and consuming network.
A heating station (1) according to claim 1, wherein the by-pass (24) is neither coupled to or in contact to the main part (1) the supply and consuming network but is positioned between these.
A heating station (500) according to claim 1 or 2, where said heating station (500) is adapted to be connected to the supply and consuming network via an interconnection device (200) adapted to be positioned between the main part (1) and the supply and consuming network heating flow circuit pipes, wherein the interconnection device (200) is formed of holding means (210) fixing a set of interconnecting conduits (220) adapted to couple first flow conduits (3) within the main part (1) to the supply and consuming network heating flow circuit pipes, and where the interconnecting conduits (220) are adapted for flow devices (225), such as valves, flow sensors and pumps, to be positioned between the main part (1) and the supply and consuming network heating flow circuit pipes,, and where said by-pass (300) is connected to said interconnection device (200).
A heating station (500) according to claim 3, wherein the interconnecting conduits (220) are pipe sections (221, 222) whereto the devices (225) can be attached.
A heating station (500) according to claim 3 or 4, wherein at least some of the interconnection conduits (220) is formed of sections (221, 222) where at least one section (221, 222) can be replaced by a flow device (225).
A heating station (500) according to claim 3, 4 or 5, wherein the by-pass (300) could be positioned on the interconnection device (200) before or after a replaceable section (221, 222) seen relative to the side to be closest to the main part (1).
A heating station (500) according to any of the previous claims 2-6, wherein the interconnecting device (200) holding means (210) is formed as a rail and comprises two parts extending in a lengthwise direction at a distance from each other, and each adapted to fixate the interconnecting conduits (220) at a position.
A heating station (500) according to any of the previous claims 2-7, wherein the interconnecting conduits (220) are formed with different coupling means (230) at the end to be coupled to the main part (1) compared to the coupling means (240) at the end to be coupled to the supply and consuming network heating flow circuit pipes.
A heating station (500) according to any of the previous claims 2-8, wherein at least two of the interconnecting device (200) interconnecting conduits (220) intersect each other.
A heating station (500) according to any of the previous claims, wherein the by-pass (300) is adapted for a sensor to be connected, such as a temperature sensor or an energy measuring device.