CA2889278A1 - Valve for changing over the heat flows of a heat pump, taking into account the flow direction reversal in a heat exchanger connected during heating operation to the source side ofthe heat pump - Google Patents
Valve for changing over the heat flows of a heat pump, taking into account the flow direction reversal in a heat exchanger connected during heating operation to the source side ofthe heat pump Download PDFInfo
- Publication number
- CA2889278A1 CA2889278A1 CA2889278A CA2889278A CA2889278A1 CA 2889278 A1 CA2889278 A1 CA 2889278A1 CA 2889278 A CA2889278 A CA 2889278A CA 2889278 A CA2889278 A CA 2889278A CA 2889278 A1 CA2889278 A1 CA 2889278A1
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- Prior art keywords
- heat
- heat pump
- valve
- connectors
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 239000000523 sample Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 9
- 230000035515 penetration Effects 0.000 claims description 6
- 239000006200 vaporizer Substances 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- XZPVPNZTYPUODG-UHFFFAOYSA-M sodium;chloride;dihydrate Chemical compound O.O.[Na+].[Cl-] XZPVPNZTYPUODG-UHFFFAOYSA-M 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/002—Compression machines, plants or systems with reversible cycle not otherwise provided for geothermal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Other Air-Conditioning Systems (AREA)
- Multiple-Way Valves (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Central Air Conditioning (AREA)
- Sustainable Development (AREA)
Abstract
The invention relates to a valve arrangement having a changeover valve with a housing (7) with at least four connection pipes (8) connected to a heat pump, with at least four connection pipes (9), each at least two of which are respectively connected to a heat source and a heat sink, with at least one valve body (10) and with a drive element for moving the valve body in the housing relative to the different connection pipes, and further comprises a heat exchanger (2) connected during heating operation to the source side of the heat pump, in which heat exchanger a flow direction reversal of the heat exchanging medium can be generated when there is a changeover between heating operation and cooling operation.
Description
Valve for changing over the heat flows of a heat pump, taking into account the flow direction reversal in a heat exchanger connected during heating operation to the source side of the heat pump The present invention relates to a valve arrangement for operating a heat pump in different ways by means of changing over the heat flows according to the preamble of claim 1 as well as a method for operating a heat pump in different ways.
Buildings can be both heated and cooled by heat pumps. The changeover from the heating mode to the cooling mode of the building can be generated in different ways, but requires an active shift either inside the heat pump or outside the heat pump at the hydraulic connections. Only by means of this shift it is possible that, e.g. during cooling operation, heat can be withdrawn from the building, where before, during heating operation, heat was released.
In typical heat pump devices as well as in widespread air conditioners, which are designated for heating and cooling operation, the changeover takes place within the heat pump cycle. Thereby the heat pump changes the operating mode by turning the vaporizer into the condenser and the condenser into the vaporizer. This kind of changeover is not ideal and leads to efficiency losses in one of the two operating modes because the components vaporizer and condenser are not identical. Moreover, the cooling medium cycle becomes
Buildings can be both heated and cooled by heat pumps. The changeover from the heating mode to the cooling mode of the building can be generated in different ways, but requires an active shift either inside the heat pump or outside the heat pump at the hydraulic connections. Only by means of this shift it is possible that, e.g. during cooling operation, heat can be withdrawn from the building, where before, during heating operation, heat was released.
In typical heat pump devices as well as in widespread air conditioners, which are designated for heating and cooling operation, the changeover takes place within the heat pump cycle. Thereby the heat pump changes the operating mode by turning the vaporizer into the condenser and the condenser into the vaporizer. This kind of changeover is not ideal and leads to efficiency losses in one of the two operating modes because the components vaporizer and condenser are not identical. Moreover, the cooling medium cycle becomes
- 2 -more complicated by additional valve equipment, which is necessary for the changeover.
Due to the mentioned disadvantages, it is desirable to use different possibilities for the changeover. A further possibility is leaving the heat pump cycle unchanged but interchanging the heat source and heat sink on installation side during the switching of an operating mode, e.g. from heating to the other mode, e.g. to cooling, as described in DE 2542728 Al, for instance. However, the mentioned interchange leads to a mixing of the media between heat source and sink. Therefore, the mentioned manner of outside changeover is only suitable, when the same medium is used on source and sink side. Thus, e.g. air-water and brine-water heat pumps, are excluded, unless additional heat exchangers are used, which prevent the mixing of the media.
Heat pump devices built nowadays are often operated with geothermal probes. Due to the natural temperature gradient prevailing in moderate climatic zones, it is interesting for the heating by means of heat pumps to use deep geothermal probes > 300 m for efficiency reasons. For the nowadays standardly used U-shaped/double U-shaped tubular probes, the pressure loss for media circulation is considerable for such great depths.
Moreover, for this type of probe, a thermal short-circuit occurs so that the potential of deep geothermal probe drills cannot be used to full capacity. As alternative
Due to the mentioned disadvantages, it is desirable to use different possibilities for the changeover. A further possibility is leaving the heat pump cycle unchanged but interchanging the heat source and heat sink on installation side during the switching of an operating mode, e.g. from heating to the other mode, e.g. to cooling, as described in DE 2542728 Al, for instance. However, the mentioned interchange leads to a mixing of the media between heat source and sink. Therefore, the mentioned manner of outside changeover is only suitable, when the same medium is used on source and sink side. Thus, e.g. air-water and brine-water heat pumps, are excluded, unless additional heat exchangers are used, which prevent the mixing of the media.
Heat pump devices built nowadays are often operated with geothermal probes. Due to the natural temperature gradient prevailing in moderate climatic zones, it is interesting for the heating by means of heat pumps to use deep geothermal probes > 300 m for efficiency reasons. For the nowadays standardly used U-shaped/double U-shaped tubular probes, the pressure loss for media circulation is considerable for such great depths.
Moreover, for this type of probe, a thermal short-circuit occurs so that the potential of deep geothermal probe drills cannot be used to full capacity. As alternative
- 3 -probe types, e.g. so-called coaxial geothermal probes may be appropriate. In such probes the heat transfer medium flows through both an external tube and an internal, ideally thermally isolated, central tube with a smaller diameter. For better usage of the potential of high temperatures during heating operation of the heat pump, the de-heated heat transfer medium flows in the geothermal probe inside the external tube into the depth and is warmed up continually. At the end of the geothermal probe the maximum temperature is reached and the heat transfer medium flows inside the internal central tube back to the heat pump. During cooling operation of the heat pump, heat source and sink are interchanged and the flow direction in the geothermal probe is reversed. Thereby, the heat to be led away from the condenser of the heat pump is returned at maximum temperature and at the deepest point of the geothermal probe to earth and stored there effectively. The warmed-up heat transfer medium thus flows downwards inside the central tube and backwards inside the external tube.
The flow direction reversal of the heat exchanger connected during heating operation to the source side of the heat pump during a changeover between heating operation and cooling operation is subsequently explained in more detail in connection with Figure 1.
The changeover of the heat flows on the installation side, instead of the cooling medium changeover in the heat pump, is nowadays applied only rarely and with valve types (4-way, 3-way, stop valve, etc.) available today, such changeover manners result in an extensive hydraulic system
The flow direction reversal of the heat exchanger connected during heating operation to the source side of the heat pump during a changeover between heating operation and cooling operation is subsequently explained in more detail in connection with Figure 1.
The changeover of the heat flows on the installation side, instead of the cooling medium changeover in the heat pump, is nowadays applied only rarely and with valve types (4-way, 3-way, stop valve, etc.) available today, such changeover manners result in an extensive hydraulic system
- 4 -with at least 2 single valves for simple changing over heating/cooling, at least 3 valves for changing over including flow direction reversal of the geothermal probe and a high number of connections, which come along with high installation expenses and corresponding costs. The increased material and installation expense for implementing the outer changeover and the additional flow direction reversal limit the spreading of this solution.
For this reason, there is a need for technical solutions for changing over the heat flows including flow direction reversal, which solutions are simple and come along with a reduced material and installation expense.
A possible solution, such as described in EP 0 967 447 Al, causes the interchange of heat source and sink with one single valve, but does not cause a flow direction reversal in a, e.g. connected coaxial geothermal probe. Therefore, it is an objective of the present invention to propose a possibility for changing over the heat flows with a flow direction reversal in a heat exchanger connected during heating operation to the source side of the heat pump, such as a geothermal probe, and which solution is simple and possible with a reduced material and installation expense.
The main idea of the present invention is, as also described in EP 0 967 447 Al, to obtain with one single valve a simple outer changeover for heat pumps, which use the same liquid medium both on the source and the sink side.
For this reason, there is a need for technical solutions for changing over the heat flows including flow direction reversal, which solutions are simple and come along with a reduced material and installation expense.
A possible solution, such as described in EP 0 967 447 Al, causes the interchange of heat source and sink with one single valve, but does not cause a flow direction reversal in a, e.g. connected coaxial geothermal probe. Therefore, it is an objective of the present invention to propose a possibility for changing over the heat flows with a flow direction reversal in a heat exchanger connected during heating operation to the source side of the heat pump, such as a geothermal probe, and which solution is simple and possible with a reduced material and installation expense.
The main idea of the present invention is, as also described in EP 0 967 447 Al, to obtain with one single valve a simple outer changeover for heat pumps, which use the same liquid medium both on the source and the sink side.
- 5 -The valve should be formed such that, in different embodiments along with the simple changeover of the source and the sink side also a flow direction reversal can be effectuated in a geothermal probe, for instance. Moreover, the valve shall give the possibility, where required, to bypass the heat pump, to short-circuit directly the source and sink side and to allow, e.g. in combination with a geothermal probe, a direct cooling, so-called "free cooling", of the building and/or a direct regeneration of the earth, e.g. with a thermal collector.
According to the invention, a valve arrangement is suggested for operating a heat pump in different ways, like for changing over the heat flows of a heat pump, according to the wording of claim 1.
It is suggested that the valve arrangement comprises a changeover valve and a heat exchanger. The changeover valve having a housing with at least four connection pieces connected to the heat pump as well as at least four connection pieces, at least two of which are connected to a heat source and at least two of which are connected to a heat sink, with at least one valve body and a drive element for moving the valve body relatively in relation to the different connection pieces in the housing. The heat exchanger is connected to the valve such that the heat exchanger during heating operation of the heat pump is connected to the source side of the heat pump and that during the changeover of the heat pump between heating operation and cooling operation the flow direction of the
According to the invention, a valve arrangement is suggested for operating a heat pump in different ways, like for changing over the heat flows of a heat pump, according to the wording of claim 1.
It is suggested that the valve arrangement comprises a changeover valve and a heat exchanger. The changeover valve having a housing with at least four connection pieces connected to the heat pump as well as at least four connection pieces, at least two of which are connected to a heat source and at least two of which are connected to a heat sink, with at least one valve body and a drive element for moving the valve body relatively in relation to the different connection pieces in the housing. The heat exchanger is connected to the valve such that the heat exchanger during heating operation of the heat pump is connected to the source side of the heat pump and that during the changeover of the heat pump between heating operation and cooling operation the flow direction of the
- 6 -heat transfer medium in the mentioned heat exchanger is reversed. As heat exchanger, a coaxial geothermal probe can be used, for example.
According to an embodiment, it is suggested that the valve body of the changeover valve shows penetrations like hollowly shaped passages, of which at least a part connects at least two connection pieces in the housing in different ways to each other according to the operating mode.
According to an embodiment, it is suggested that the valve body is designed rotationally symmetrical, for instance cylindrical or spherical, and is rotatable in relation to the housing surrounding the valve body shell-like for connecting the connection pieces to each other in different ways.
According to a further embodiment, it is suggested that the valve body is linearly movable in relation to the housing, whereby the connection pieces are connectable to each other in different ways according to the operating mode by means of a translational movement. Further embodiments of the invention are characterized in the dependent claims.
Furthermore, a method for operating a heat pump in different ways by changing over the heat flows of the heat pump according to the wording of claim 11 is suggested.
Further embodiments of the method according to the invention are characterized in the dependent claims.
=
According to an embodiment, it is suggested that the valve body of the changeover valve shows penetrations like hollowly shaped passages, of which at least a part connects at least two connection pieces in the housing in different ways to each other according to the operating mode.
According to an embodiment, it is suggested that the valve body is designed rotationally symmetrical, for instance cylindrical or spherical, and is rotatable in relation to the housing surrounding the valve body shell-like for connecting the connection pieces to each other in different ways.
According to a further embodiment, it is suggested that the valve body is linearly movable in relation to the housing, whereby the connection pieces are connectable to each other in different ways according to the operating mode by means of a translational movement. Further embodiments of the invention are characterized in the dependent claims.
Furthermore, a method for operating a heat pump in different ways by changing over the heat flows of the heat pump according to the wording of claim 11 is suggested.
Further embodiments of the method according to the invention are characterized in the dependent claims.
=
- 7 -The invention is now further explained by referring to the attached figures showing exemplified embodiments.
Figures la and lb show an example of a hydraulic connection of a heat pump system having the valve arrangement according to the invention;
Figure 2 shows a schematic sectional view of a changeover valve according to the invention having a connected heat exchanger, which is connected to the source side of the heat pump during heating operation;
Figures 3 and 4 show two exemplary embodiments of the changeover valve according to the invention in a schematic sectional view, also having a connected heat exchanger, which is connected to the source side of the heat pump during heating operation;
and Figure 5 schematically shows different operating modes having connections between the different connectors of the changeover valve and the flow direction of the connected heat exchanger, which is connected to the source side of the heat pump during heating operation.
Figures la and lb show an example of a hydraulic connection of a heat pump system having a heat pump 1, a coaxial geothermal probe 2, a thermal collector 3, a room releasing system 4, circulation pumps 5 and a valve device 6 of the valve arrangement according to the invention.
Figures la and lb show an example of a hydraulic connection of a heat pump system having the valve arrangement according to the invention;
Figure 2 shows a schematic sectional view of a changeover valve according to the invention having a connected heat exchanger, which is connected to the source side of the heat pump during heating operation;
Figures 3 and 4 show two exemplary embodiments of the changeover valve according to the invention in a schematic sectional view, also having a connected heat exchanger, which is connected to the source side of the heat pump during heating operation;
and Figure 5 schematically shows different operating modes having connections between the different connectors of the changeover valve and the flow direction of the connected heat exchanger, which is connected to the source side of the heat pump during heating operation.
Figures la and lb show an example of a hydraulic connection of a heat pump system having a heat pump 1, a coaxial geothermal probe 2, a thermal collector 3, a room releasing system 4, circulation pumps 5 and a valve device 6 of the valve arrangement according to the invention.
- 8 -Figure la shows the system during heating operation, Figure lb shows the system during cooling operation, respectively, with exemplary operation temperatures each. During heating operation the cycle of the thermal collector is switched off and the coaxial geothermal probe is flowing from outside to inside (from a to p). During cooling operation the cycle of the collector is switched on, the flow direction inside the coaxial geothermal probe is reversed and the flow takes place from the inside to the outside (from p to a). The reversal of the flow direction prevents selectively and favors selectively, respectively, the heat transfer between the probe fluid and the earth alongside of the probe length.
The outer changeover allows a constant and concordant operation of the cooling cycle of the heat pump and increases thereby the average efficiency of the heat pump analyzed over both operating modes, heating and cooling.
The invention reduces the complexity of the hydraulic installation, which results from the outer changeover with flow direction reversal using classic valve technique, by situating the complexity of connections in one single valve. Therefore, the installation expense is reduced and there is the potential to realize an advantageous solution.
The reduction from at least three 4-way or four 3-way valves for changing over heating/cooling including the reversal of the flow direction in the probe to one single valve improves by means of saving space also the . CA 02889278 2010,13 ,
The outer changeover allows a constant and concordant operation of the cooling cycle of the heat pump and increases thereby the average efficiency of the heat pump analyzed over both operating modes, heating and cooling.
The invention reduces the complexity of the hydraulic installation, which results from the outer changeover with flow direction reversal using classic valve technique, by situating the complexity of connections in one single valve. Therefore, the installation expense is reduced and there is the potential to realize an advantageous solution.
The reduction from at least three 4-way or four 3-way valves for changing over heating/cooling including the reversal of the flow direction in the probe to one single valve improves by means of saving space also the . CA 02889278 2010,13 ,
- 9 -possibility for integrating the outer changeover into the housing of the heat pump.
Furthermore, the changeover valve of the valve arrangement allows a simple integration of additional features, such as bypassing the heat pump for a "free-cooling" mode or for direct regeneration of the earth using a thermal collector or the interchange of the order of the flow of the geothermal probe and the thermal collector in connection to a flow direction reversal of the coaxial geothermal probe or others.
According to the invention, the changeover valve of the valve arrangement, as show in Figure 2, comprises a housing 7 having connection pieces for the heat pump 8 and for the sources/sinks 9, a valve body 10 and a drive element 11 with possible extensions of the connection pieces for connecting directly, e.g. a thermal collector.
The valve body 10 comprises cavities, penetrations, respectively, which connect the connection pieces of the heat pump side 8 in a special way to the connection pieces of the source/sink side 9. Which connection pieces are connected to each other depends on the operating mode (heating/cooling, "free cooling", regeneration earth, etc.). Moreover, in opposite to the illustration in Figure 2, it is possible that the connectors of the heat pump and of the source/sink side can be arranged both-sided each at the valve body. If need be, the connectors can be arranged all-sided.
'
Furthermore, the changeover valve of the valve arrangement allows a simple integration of additional features, such as bypassing the heat pump for a "free-cooling" mode or for direct regeneration of the earth using a thermal collector or the interchange of the order of the flow of the geothermal probe and the thermal collector in connection to a flow direction reversal of the coaxial geothermal probe or others.
According to the invention, the changeover valve of the valve arrangement, as show in Figure 2, comprises a housing 7 having connection pieces for the heat pump 8 and for the sources/sinks 9, a valve body 10 and a drive element 11 with possible extensions of the connection pieces for connecting directly, e.g. a thermal collector.
The valve body 10 comprises cavities, penetrations, respectively, which connect the connection pieces of the heat pump side 8 in a special way to the connection pieces of the source/sink side 9. Which connection pieces are connected to each other depends on the operating mode (heating/cooling, "free cooling", regeneration earth, etc.). Moreover, in opposite to the illustration in Figure 2, it is possible that the connectors of the heat pump and of the source/sink side can be arranged both-sided each at the valve body. If need be, the connectors can be arranged all-sided.
'
- 10 -For the valve arrangement, as shown in Figure 2, different embodiments are possible for changing over the heat flows according to the described invention. Two possible embodiments are changed over by a rotative movement around the x-, y-axis, respectively, and based on a cylindrical valve body having penetrations on the shell surface, or on the front sides, respectively. Further rotationally symmetrical geometries, such as a ball, are conceivable as valve bodies as well. A further embodiment is based on a linear slider, which causes the changeover by means of a movement translational along the x-axis or transvers to the x-axis.
It is characteristic for the invention that the outer changeover and the flow direction reversal takes place in a heat exchanger connected during heating operation to the source side of the heat pump, such as a geothermal probe, within one single element (valve) and that only one adjusting element is necessary for the changeover. As alternative embodiment to the embodiment shown in Figure 2, the connections of the connectors can also be defined in the housing 7 and, instead of the valve body 10, a simple control disk can also be used, which selectively releases certain connections in the housing and separates others.
In Figure 3 and Figure 4, two exemplary embodiments of the valve arrangement according to the invention are shown. The changeover valve, as component of the mentioned valve arrangement, is shown in a sectional view, on the one hand,
It is characteristic for the invention that the outer changeover and the flow direction reversal takes place in a heat exchanger connected during heating operation to the source side of the heat pump, such as a geothermal probe, within one single element (valve) and that only one adjusting element is necessary for the changeover. As alternative embodiment to the embodiment shown in Figure 2, the connections of the connectors can also be defined in the housing 7 and, instead of the valve body 10, a simple control disk can also be used, which selectively releases certain connections in the housing and separates others.
In Figure 3 and Figure 4, two exemplary embodiments of the valve arrangement according to the invention are shown. The changeover valve, as component of the mentioned valve arrangement, is shown in a sectional view, on the one hand,
- 11 -as cylinder with rotation around the x-axis (Figure 3) and, on the other hand, as axial slider with movement along the x-axis (Figure 4). The heat exchanger, which is connected during heating operation to the source side of the heat pump, is connected to the changeover valve in both embodiments. In both embodiments a changeover takes place between the source and the sink side as well as the flow direction in the connected heat exchanger is reversed.
The position of the cylindrical changeover valve shows the heating operation in Figure 3, above, so that i is connected to A, ii to C, iii to B and iv to D. The connected heat exchanger is flown through from connector a in direction to connector p. During cooling operation (Figure 3 below) the connectors are connected to each other as follows: i to C, ii to A, iii to D and iv to B. The connected heat exchanger is flown through from connector p in direction to connector a.
In Figure 4 above, the valve is shown in the axial embodiment in the position for the heating operation, so that also i is connected to A, ii to B, iii to C and iv to D. In this embodiment, the connection between iv and D
during heating operation is not only achieved by the valve body but by the valve body and the housing cavity. The connected heat exchanger is flown through from connector a in direction to connector p. During cooling operation (Figure 4 below), the connectors are connected to each other as follows: i to B, ii to D, iii to A and iv to C.
The position of the cylindrical changeover valve shows the heating operation in Figure 3, above, so that i is connected to A, ii to C, iii to B and iv to D. The connected heat exchanger is flown through from connector a in direction to connector p. During cooling operation (Figure 3 below) the connectors are connected to each other as follows: i to C, ii to A, iii to D and iv to B. The connected heat exchanger is flown through from connector p in direction to connector a.
In Figure 4 above, the valve is shown in the axial embodiment in the position for the heating operation, so that also i is connected to A, ii to B, iii to C and iv to D. In this embodiment, the connection between iv and D
during heating operation is not only achieved by the valve body but by the valve body and the housing cavity. The connected heat exchanger is flown through from connector a in direction to connector p. During cooling operation (Figure 4 below), the connectors are connected to each other as follows: i to B, ii to D, iii to A and iv to C.
- 12 -The connections between the heat pump and the source/sink during cooling operation are achieved again alone by the valve body for the shown arrangement. The connected heat exchanger is flown through from connector I3 in direction to connector a.
Exemplary illustration of the connection between the heat pump and the source/sink side, as well as flow direction of the heat exchanger connected during heating operation to the source side of the heat pump for different operating modes.
In Figure 5, both the connections between the different connectors of the valve device for different operating modes and the flow direction of the connected heat exchanger, are schematically shown. For the outer changeover of the source and sink side including flow direction reversal (Figure 5, position a-c), the heat pump, the release system and a heat exchanger (e.g. geothermal probe) are connected to the valve device. In case of a possible extension of the valve device, a thermal collector is connected additionally to the valve device (Figure 5, position d-f). By means of the said extension it is possible to maintain the order of the flow of the geothermal probe and the thermal collector, or to interchange the order during simultaneous reversal of the flow direction inside the geothermal probe, respectively.
The different operating modes in Figure 5 are the following:
Exemplary illustration of the connection between the heat pump and the source/sink side, as well as flow direction of the heat exchanger connected during heating operation to the source side of the heat pump for different operating modes.
In Figure 5, both the connections between the different connectors of the valve device for different operating modes and the flow direction of the connected heat exchanger, are schematically shown. For the outer changeover of the source and sink side including flow direction reversal (Figure 5, position a-c), the heat pump, the release system and a heat exchanger (e.g. geothermal probe) are connected to the valve device. In case of a possible extension of the valve device, a thermal collector is connected additionally to the valve device (Figure 5, position d-f). By means of the said extension it is possible to maintain the order of the flow of the geothermal probe and the thermal collector, or to interchange the order during simultaneous reversal of the flow direction inside the geothermal probe, respectively.
The different operating modes in Figure 5 are the following:
- 13 -Position a: Heating Position b: Cooling with reversal of the flow direction in the geothermal probe Position c: Free cooling Position d: Possible extension; heating with thermal collector and coaxial geothermal probe Position e: Possible extension; cooling with thermal collector and coaxial geothermal probe Position f: Possible extension; regeneration of the earth with thermal collector Explanation Condenser OUT
ii Vaporizer IN
iii Vaporizer OUT
iv Condenser IN
A Room VL
Heat exchanger connector a Heat exchanger connector p Room RL
E VL thermal collector RL thermal collector Both the possible embodiments of a valve arrangement, according to the invention depicted in Figures 1 to 5, and the described methods are of course only examples for a better understanding of the present invention.
In particular, the shown valve arrangements are only examples and other embodiments are possible. For instance, it is conceivable that the valve body is formed as ball and
ii Vaporizer IN
iii Vaporizer OUT
iv Condenser IN
A Room VL
Heat exchanger connector a Heat exchanger connector p Room RL
E VL thermal collector RL thermal collector Both the possible embodiments of a valve arrangement, according to the invention depicted in Figures 1 to 5, and the described methods are of course only examples for a better understanding of the present invention.
In particular, the shown valve arrangements are only examples and other embodiments are possible. For instance, it is conceivable that the valve body is formed as ball and
- 14 -that by means of rotating the valve body inside of a shell-shaped housing surrounding the body, the different connectors can be connected to each other as shown in Figure 5. Instead of a slider, a cylinder can of course be moved linearly inside of the housing and, where required, parts of the connections can already be designated inside the housing. A solution as linear slider, which is slid transverse in relation to the x-axis and comprises in the valve body respectively per position penetrations corresponding to the number of outer connectors, is also conceivable. The present invention does not especially emphasize on the material choice for producing housings and valve bodies, since metallic materials as well as polymer, ceramic or other materials can be used depending on the requirement. The present invention does neither especially emphasize on the controlling of the valve, since the possibilities are endless.
Claims (14)
1. A valve arrangement comprising a changeover valve having a housing (7) with at least four connection pieces (8) connected to a heat pump, with at least four connection pieces (9), at least two of which are connected to a heat source and at least two of which are connected to a heat sink, with at least one valve body (10) and a drive element for moving the valve body relative in relation to the different connection pieces in the housing and further comprising a heat exchanger (2) connected during heating operation to the source side of the heat pump, in which a flow direction reversal of the heat transfer medium can be generated when there is a changeover between heating operation and cooling operation.
2. The valve arrangement according to claim 1, characterized in that the valve body (10) comprises penetrations or hollowly shaped passages, of which at least a few connect at least two connection pieces to each other in different ways according to the operating mode.
3. The valve arrangement according to claim 1 or 2, characterized in that the valve body is designed rotationally symmetrical, like cylindrical or spherical, and is rotatable in relation to the housing surrounding the valve body for connecting the connection pieces to each other in different ways.
4. The valve arrangement according to claim 1 or 2, characterized in that the valve body is movable linearly in relation to the housing, whereby the connection pieces are connectable to each other in different ways according to the operating mode by means of a translational movement.
5. The valve arrangement according to any one of the claims 1 to 4, characterized in that the drive element is formed by a mechanical drive, wherein the controlling is carried out manually or based on e.g. electrical energy.
6. The valve arrangement according to any one of the claims 1 to 5, characterized in that at least two connectors are designated for a condenser, at least two connectors for a vaporizer, at least two connectors for a cooling or heating cycle, respectively, and at least two connectors for a heat source/sink and/or a heat store device, such as a geothermal probe.
7. The valve arrangement according to any one of the claims 1 to 6, characterized in that the connection pieces are connectable in different ways such that the heat source and sink of the heat pump are interchanged and thereby allow both heating and cooling operation.
8. The valve arrangement according to any one of the claims 1 to 7, characterized in that the connectors are connectable such that the connection pieces of the heat source and heat sink are directly connectable to each other.
9. The valve arrangement according to any one of the claims 1 to 8, characterized in that further connectors in the housing are designated for connecting accessory devices like thermal collectors, further cooling or heating cycles, heat stores, etc.
10. A heat pump system having a heat pump, a coaxial geothermal probe, a room releasing system, circulation pumps and, where required, a thermal collector with a valve arrangement according to any one of the claims 1 to 9.
11. A method for operating a heat pump in different ways by changing over the heat flows of a heat pump, as well as for generating a flow direction reversal in a heat exchanger connected during heating operation to the source side of the heat pump, characterized in that the heat pump is connected to a housing of a valve arrangement by at least four connectors, as well as at least one heat source and at least one heat sink are also connected to the same housing by at least two connectors each and the different operating mode is carried out by connecting the connectors to each other in different ways by means of a valve body located in the housing, the valve body being moved in relation to the housing.
12. The method according to claim 11 for heating or cooling a building by use of at least a heat source/heat sink each, such as a heat absorption/heat release system, as well as a geothermal probe, characterized in that the connectors of the heat pump and the heat source/heat sink are switched by means of the penetrations or hollowly shaped passages of the valve body such that a different usage of the heat pump (heating/cooling) is possible without reversal of the inner cooling medium flows.
13. The method according to claim 11 or 12, characterized in that a reversal of the flow direction is generated by connecting the connectors in different ways, in particular in a coaxial geothermal probe.
14. The method according to any one of claims 11 to 13, characterized in that by arranging further connectors under usage of one or more thermal collectors by connecting the connectors in different ways, the perpetuation of the order of the flow of thermal collectors and geothermal probe is possible, where required, during simultaneous flow direction reversal of the geothermal probe.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH02363/12A CH707175A1 (en) | 2012-11-13 | 2012-11-13 | Valve for switching the heat flows to a heat pump. |
| CH2363/12 | 2012-11-13 | ||
| PCT/EP2013/073632 WO2014076087A1 (en) | 2012-11-13 | 2013-11-12 | Valve for changing over the heat flows of a heat pump, taking into account the flow direction reversal in a heat exchanger connected during heating operation to the source side of the heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2889278A1 true CA2889278A1 (en) | 2014-05-22 |
Family
ID=49554287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2889278A Abandoned CA2889278A1 (en) | 2012-11-13 | 2013-11-12 | Valve for changing over the heat flows of a heat pump, taking into account the flow direction reversal in a heat exchanger connected during heating operation to the source side ofthe heat pump |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20160305694A1 (en) |
| EP (1) | EP2920520A1 (en) |
| JP (1) | JP2016502636A (en) |
| KR (1) | KR20150083886A (en) |
| CN (1) | CN104781611A (en) |
| AU (1) | AU2013346935A1 (en) |
| BR (1) | BR112015010488A2 (en) |
| CA (1) | CA2889278A1 (en) |
| CH (1) | CH707175A1 (en) |
| RU (1) | RU2015122691A (en) |
| WO (1) | WO2014076087A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10180190B2 (en) * | 2013-09-27 | 2019-01-15 | Bharath Sai Kumar G. R. | Method, system, apparatus and device for directional flow control of fluids and gases |
| DE102015000424B3 (en) * | 2015-01-14 | 2016-04-07 | Audi Ag | Rotary valve for a heating and cooling system |
| CN106678927A (en) * | 2017-02-07 | 2017-05-17 | 俞银星 | Water way reversing system capable of switching normal and reverse circulation directions, water heating device and heating method |
| CN106940032A (en) * | 2017-04-17 | 2017-07-11 | 中能服能源科技股份有限公司 | A kind of single well type deep geothermal heat utilizes direct combustion type heat pump heat distribution system |
| CN110094543B (en) * | 2019-04-30 | 2020-07-14 | 上海化工院检测有限公司 | Slider type heat insulation reversing valve and high-low temperature conversion system |
| WO2021231619A1 (en) * | 2020-05-12 | 2021-11-18 | Jacobi Robert W | Switching flow water source heater/chiller |
| DE102020115277A1 (en) | 2020-06-09 | 2021-12-09 | Stiebel Eltron Gmbh & Co. Kg | Method and device for power control passive cooling |
| CN112880166B (en) * | 2021-02-20 | 2022-05-10 | 珠海格力电器股份有限公司 | Automatic setting method and device for temperature controller and temperature controller |
| AT525349B1 (en) * | 2022-03-24 | 2023-03-15 | Ochsner Waermepumpen Gmbh | System for domestic heat supply |
| DE102022127454A1 (en) | 2022-10-19 | 2024-04-25 | Viessmann Climate Solutions Se | Heat pump device and method for operating a heat pump device |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6717616A (en) * | 1967-09-15 | 1969-03-18 | ||
| DE2542728C3 (en) | 1975-09-25 | 1981-11-26 | Burger, Manfred R., 8023 Pullach | Heat pump for optional heating or cooling operation |
| CA1063370A (en) * | 1976-11-01 | 1979-10-02 | Consolidated Natural Gas Service Company Inc. | Heat pump system |
| US4553402A (en) * | 1979-09-28 | 1985-11-19 | Cramer Sr Carl V | Non-reversible multiple-refrigeration-cycle solar apparatus including a variable directing valve mechanism |
| US5461876A (en) * | 1994-06-29 | 1995-10-31 | Dressler; William E. | Combined ambient-air and earth exchange heat pump system |
| EP0967447A1 (en) * | 1998-05-20 | 1999-12-29 | Itho B.V. | Heat pump system |
| EP1092928A4 (en) * | 1998-07-02 | 2005-01-05 | Saginomiyaseisakusho Kk | Flow path selector valve and method of selecting and driving the valve, compressor with flow path selector valve, and refrigerating cycle control device |
| KR100329930B1 (en) * | 1999-09-08 | 2002-03-22 | 윤종용 | Apparatus for selecting directional refrigerant passage of a cooling and heat pump type air-conditioner |
| US6289931B1 (en) * | 2000-01-19 | 2001-09-18 | Emerson Electric Co. | Cycle reversing valve for use in heat pumps |
| US6321558B1 (en) * | 2000-10-06 | 2001-11-27 | American Standard International Inc. | Water source heat pump with hot gas reheat |
| US6615602B2 (en) * | 2001-05-22 | 2003-09-09 | Ken Wilkinson | Heat pump with supplemental heat source |
| AU2002314569A1 (en) * | 2002-02-27 | 2003-09-09 | Yun-Boon Lee | Four-way reversing valve |
| JP2004263851A (en) * | 2003-01-06 | 2004-09-24 | Tgk Co Ltd | Switching valve |
| DE50305842D1 (en) * | 2003-06-13 | 2007-01-11 | Tiroler Roehren & Metallwerk | energy pile |
| JP4651394B2 (en) * | 2005-01-13 | 2011-03-16 | 三菱電機株式会社 | Four-way valve |
| DE102007009196B4 (en) * | 2007-02-26 | 2010-07-01 | Kioto Clear Energy Ag | Hot water and heating system operating on the basis of renewable energy sources |
| CA2679918A1 (en) * | 2007-03-06 | 2008-09-12 | A & S Umwelttechnologie Ag | System for the construction of geothermal probes |
| FR2921471A1 (en) * | 2007-09-21 | 2009-03-27 | Hades Soc Par Actions Simplifi | Distributor casing for use in heating/air-conditioning installation, has control unit controlling two-way on or off stop valves to select one of combination schemes for distributing heat transfer fluid |
| DE102008053554A1 (en) * | 2008-10-28 | 2010-04-29 | Behr Gmbh & Co. Kg | Air conditioning system for a building |
| WO2010053798A1 (en) * | 2008-10-28 | 2010-05-14 | Trak International, Llc | Methods and equipment for heating and cooling building zones |
| DE102009011092A1 (en) * | 2009-03-03 | 2010-09-09 | Piper, Erik John William | Environmental heat recovery system for absorbing and utilizing thermal energy from environmental heat in e.g. soil, has heat recovery probe, where heat transfer liquid flows back into gap under admission of heat from environment of probe |
-
2012
- 2012-11-13 CH CH02363/12A patent/CH707175A1/en not_active Application Discontinuation
-
2013
- 2013-11-12 RU RU2015122691A patent/RU2015122691A/en not_active Application Discontinuation
- 2013-11-12 AU AU2013346935A patent/AU2013346935A1/en not_active Abandoned
- 2013-11-12 US US14/442,154 patent/US20160305694A1/en not_active Abandoned
- 2013-11-12 KR KR1020157014781A patent/KR20150083886A/en not_active Application Discontinuation
- 2013-11-12 WO PCT/EP2013/073632 patent/WO2014076087A1/en active Application Filing
- 2013-11-12 CN CN201380058828.6A patent/CN104781611A/en active Pending
- 2013-11-12 JP JP2015541182A patent/JP2016502636A/en active Pending
- 2013-11-12 BR BR112015010488A patent/BR112015010488A2/en not_active IP Right Cessation
- 2013-11-12 EP EP13789339.2A patent/EP2920520A1/en not_active Withdrawn
- 2013-11-12 CA CA2889278A patent/CA2889278A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2013346935A1 (en) | 2015-06-04 |
| CH707175A1 (en) | 2014-05-15 |
| KR20150083886A (en) | 2015-07-20 |
| CN104781611A (en) | 2015-07-15 |
| BR112015010488A2 (en) | 2017-07-11 |
| EP2920520A1 (en) | 2015-09-23 |
| US20160305694A1 (en) | 2016-10-20 |
| WO2014076087A1 (en) | 2014-05-22 |
| RU2015122691A (en) | 2017-01-10 |
| JP2016502636A (en) | 2016-01-28 |
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Legal Events
| Date | Code | Title | Description |
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| FZDE | Discontinued |
Effective date: 20171114 |