U.S. patent application number 11/815629 was filed with the patent office on 2008-01-10 for control system for panel heating.
Invention is credited to Annette Gabanyi, Peter Gabanyi.
Application Number | 20080006710 11/815629 |
Document ID | / |
Family ID | 35668826 |
Filed Date | 2008-01-10 |
United States Patent
Application |
20080006710 |
Kind Code |
A1 |
Gabanyi; Peter ; et
al. |
January 10, 2008 |
Control System For Panel Heating
Abstract
A control system for panel heating, in particular in the form of
underfloor heating systems. In said system a respective valve
controls the volumetric flow of hot water through the panel heating
of a room and a valve, which divides the volumetric flow of hot
water that is supplied to the respective room into two parts, is
positioned upstream or downstream of the first valve. The first
part of the volumetric flow of hot water is supplied to the panel
heating directly or via a restrictor unit, while the second part of
the volumetric flow of hot water is supplied to the panel heating
via a thermostatically regulated control valve.
Inventors: |
Gabanyi; Peter; (Gilching,
DE) ; Gabanyi; Annette; (Gilching, DE) |
Correspondence
Address: |
OSTROLENK FABER GERB & SOFFEN
1180 AVENUE OF THE AMERICAS
NEW YORK
NY
100368403
US
|
Family ID: |
35668826 |
Appl. No.: |
11/815629 |
Filed: |
February 3, 2006 |
PCT Filed: |
February 3, 2006 |
PCT NO: |
PCT/EP06/00960 |
371 Date: |
September 7, 2007 |
Current U.S.
Class: |
237/8A |
Current CPC
Class: |
Y02B 30/24 20130101;
F24D 19/1021 20130101; F24D 3/12 20130101; Y02B 30/00 20130101 |
Class at
Publication: |
237/008.00A |
International
Class: |
F24D 19/00 20060101
F24D019/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 7, 2005 |
DE |
10 2005 005 733.0 |
Claims
1. A control system for panel heating, in which a valve is provided
in order to control the heating-water volume flow through the panel
heating in a room, wherein the valve is preceded or followed by a
valve which splits the heating-water volume flow that is supplied
to the respective room into two parts, with the first part of the
heating-water volume flow being supplied directly or via a
restrictor device to the panel heating, while the second part of
the heating-water volume flow is supplied to the panel heating via
a thermostatically controlled control valve.
2. The control system as claimed in claim 1, wherein the valve is
designed to adjust the proportional components of the first part of
the heating-water volume flow, which is supplied directly to the
panel heating, and of the second part of the heating-water volume
flow, which is supplied via the thermostatically controlled control
valve.
3. The control system as claimed in claim 2, wherein the valve has
a fixed setting for the proportional components of the first and
the second part of the heating-water volume flow.
4. The control system as claimed in claim 2, wherein the
proportional components of the heating-water volume flow can be
adjusted by means of the valve.
5. The control system as claimed in claim 1, wherein the valve has
a fixed shutter which governs the second part of the heating-water
volume flow which is supplied to the panel heating.
6. The control system as claimed in claim 4, further comprising a
further adjusting valve for the first part of the heating-water
volume flow is arranged between the valve and the inlet of the
panel heating.
7. The control system as claimed in claim 1, wherein the valve is
remotely controllable.
8. The control system as claimed in claim 1, wherein the valve is
an adjusting or shut-off valve for hydraulic regulation of all of
the panel heaters in a heating installation, and precedes or
follows the valve.
9. The control system as claimed in claim 1, wherein the valve, the
valve and the thermostatically controlled control valve as well as
the adjusting valve are arranged in a common valve block, which has
one output at which the first and second parts of the heating-water
volume flow are combined with one another.
Description
[0001] The invention relates to a control system for panel heating
of the type mentioned in the precharacterizing clause of claim
1.
[0002] In recent years, panel heating, especially in the form of
floor heating but also in the form of heated ceilings and walls,
has been becoming ever more important. The advantages of economical
and energy-saving operation, better room-air hygienic conditions,
comfort and futuristic, environmentally friendly low-temperature
systems are also being exploited in multiple occupancy houses.
[0003] The lawmakers have defined specific regulations for the
control system of a heating installation. The law controls: [0004]
1. The heating water temperature and [0005] 2. The heating-water
volume flow
[0006] The heating-water temperature (inlet temperature) is
controlled as standard via a central control system for the entire
building, by means of the outside temperature and/or another
reference variable.
[0007] As is likewise stipulated by the lawmakers, the
heating-water volume flow is controlled by means of automatically
acting devices for controlling the room temperature, on a
room-by-room basis.
[0008] The control valve which is influenced by the "room air
temperature" reference variable varies the heating-water volume
flow with the aim of varying the heat emitted from the panel, for
example in the floor, to the room.
[0009] In the case of panel heating, the type of room-by-room
temperature control that is known for space heaters using the room
temperature as a reference variable, by virtue of the lack of any
alternative, is not directly suitable, since panel heating reacts
too slowly for this purpose. The floor fittings which are normally
used in modern floor heating systems result in variation of the
heat output becoming effective only after about 2 hours. This time
between the action of the control valve and the start of
effectiveness in the room is referred to as the control time or
delay time. This also applies to panel heaters in the form of
heated walls and ceilings.
[0010] This disadvantageous effect of this delay time is
ameliorated by the physical phenomenon known as the
"self-regulation effect". This natural effect regulates the power
output from the heating panel in direct proportion to the
temperature difference between the heating-panel temperature and
the room temperature. This effect, which has a very powerful effect
because of the small temperature difference especially with panel
heating, is independent of control systems and takes place at the
same time as changing room-temperature conditions. This reduces the
poor, slow response of the control valve.
[0011] The invention is based on the object of providing a control
system of the type mentioned initially, which has an improved
control response.
[0012] This object is achieved by the features specified in claim
1.
[0013] Advantageous refinements and developments of the invention
are specified in the dependent claims.
[0014] The invention is based on the discovery that, if the amount
of heat which must be supplied to the room in accordance with the
calculated heat load in order to reach the required room
temperature is analyzed, a distinction must be drawn between by far
the majority of the heat which must be supplied permanently and a
small component which is influenced by external influences such as
solar radiation, external heat, fans etc.
[0015] If these disturbance-variable influences did not exist, then
it would be sufficient to match the inlet temperature to the
outside temperature for the entire building. There would be no need
for additional room-by-room control.
[0016] The proportion of the heating-water volume flow which
corresponds to the permanently supplied amount of heat should not
be influenced by a slow-reaction control valve.
[0017] In the control system according to the invention, the
heating-water volume flow is split by a valve in a freely variable
ratio into two volume flow elements, in which case each volume flow
element can be influenced by at least one different type of
controlled variable. These two volume flows may be varied between 0
and 100%, with the first part of the heating-water volume flow
being supplied directly to the panel heating, while the second part
of the heating-water volume flow is supplied to the panel heating
via a thermostatically controlled control valve.
[0018] In one embodiment, the valve is designed such that it allows
the proportional components of the first part of the heating-water
volume flow, which is supplied directly to the panel heating, and
of the second part of the heating-water volume flow, which is
supplied via the thermostatically controlled control valve, to be
adjusted.
[0019] In this case, the valve can permanently set the proportional
component of the first and second part of the heating-water volume
flow, or the proportional components of the heating-water volume
flow may be adjustable.
[0020] In the first case, the valve may have a fixed shutter which
governs the second part of the heating-water volume flow which is
supplied to the panel heating.
[0021] In the second case, the valve may itself have an adjustment
capability for the magnitude of the two volume-flow elements, or a
further adjusting valve for the first part of the heating-water
volume flow which is supplied directly to the panel heating can be
arranged between the valve and the inlet of the panel heating.
[0022] In one embodiment, the valve may be remotely controllable
both for the first part and for the second part of the
heating-water volume.
[0023] The valve which controls the overall heating-water volume
flow may be an adjusting or shut-off valve for hydraulic regulation
of all of the panel heating in a heating installation, and precedes
or follows the valve which controls the ratio of the two volume
flow elements.
[0024] According to one preferred refinement of the invention, the
valve which controls the ratio of the two volume flow elements and
the thermostatically controlled control valve, and if appropriate
the adjusting valve and the valve which controls the overall
heating-water volume flow, can be arranged in a common valve block,
which has one output at which the first and second parts of the
heating-water volume flow are combined with one another, and which
is connected to the panel heating.
[0025] The invention will be explained in more detail in the
following text with reference to the drawings, in which:
[0026] FIG. 1 shows a first embodiment of the control system with
the volume flow elements permanently set,
[0027] FIG. 2 shows an embodiment of the control system in which
the volume flow elements can be varied,
[0028] FIG. 3 shows a further embodiment of the control system in
which the volume flow elements can be varied.
[0029] FIG. 1 shows a first embodiment of the control system.
[0030] In this embodiment of the control system, the outlet of the
adjusting or shut-off valve 10 is connected to a valve 6 which
splits the overall heating-water volume flow 1 from the inlet into
two heating-water volume flow elements 2, 3, of which one volume
flow 3 is supplied directly to the panel heating 11, which is
connected to the heating-system return 12. The valve 6 is in this
case formed by a shutter, which results in a fixed ratio between
the two flow elements 2, 3 of the heating-water volume flow 1. The
volume flow element 2 is likewise supplied via a thermostatically
controlled control valve 4 to the inlet of the panel heating 11
which, for example, is floor heating. In this embodiment, the ratio
between the two flow elements 2, 3 of the heating-water volume flow
1 is therefore predetermined, and is fixed, by the design.
[0031] In contrast, in the embodiment shown in FIG. 2, the valve is
formed by a valve 5 which can either be operated from the outside
or is remotely controllable. The function of this valve 5 is the
same as in the case of the embodiment shown in FIG. 1, but with the
capability to adjust the ratio of the volume flow elements 2, 3 in
this case. In this case, the proportion flowing via the
thermostatically controlled control valve 4 may be varied either
towards 0 or towards 100%.
[0032] The proportion of the second volume flow 2 should become
greater, the greater the extent that disturbance variables, such as
external heat, solar radiation, the direction of the sky, etc can
influence the environment in the individual room.
[0033] Changes can be made later by a change in the user behavior,
resulting in a change in the setting ratio.
[0034] The reference variable or controlled variable which controls
the drive for the valve 5 or 7 is a different variable than that
for the drive for the valve 4. The drive for the thermostatically
controlled valve 4 may be a thermostatic remote sensor, an
electrical actuating motor or a time switch.
[0035] The hydraulic matching, that is to say the setting of the
overall heating-water volume flow 1 in order to cover the heating
load for the room, is achieved by operating the valve 10. This
allows the overall heating-water volume to be shut off at the same
time. Although the drawings show this valve 10 in an arrangement
upstream of the valves 5, 6, it may also be connected downstream
from these valves.
[0036] In the embodiment shown in FIG. 3, the same valve 6 is used
as that in FIG. 1 with a fixed shutter (although it is also
possible to use the valve 5 as shown in FIG. 2), but a variable
valve 7 is arranged in the path of the first volume flow element 3,
allowing adjustment of this first volume flow element.
[0037] The reference or control variables which control the drive
for the valve are the surface temperature of the floor or the
flooring temperature (state of charge), or the temperature of the
heating medium.
[0038] According to one preferred refinement of the invention, all
of the valve elements 10, 5/6, 4, and if appropriate 7, shown in
FIGS. 1 to 3 are combined to form a single valve block, which is
connected on one side to the inlet and on the other side to the
panel heating, so that there is no need for the extensive
distribution systems that are otherwise used for panel heating
systems in dwellings, and these can be replaced by a single ring
main or spur-line system.
[0039] The arrangement in a common valve block means that the valve
cones of different valves, such as the valves 4 and 7, can be
operated by a common spindle, for example the spindle of an
electrical control drive, by combined measurement and control
commands, or for frost-protection and emergency-operation
settings.
* * * * *