EP1882888A1 - Heat pump system, in particular for air conditioning a building - Google Patents

Heat pump system, in particular for air conditioning a building Download PDF

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Publication number
EP1882888A1
EP1882888A1 EP06025558A EP06025558A EP1882888A1 EP 1882888 A1 EP1882888 A1 EP 1882888A1 EP 06025558 A EP06025558 A EP 06025558A EP 06025558 A EP06025558 A EP 06025558A EP 1882888 A1 EP1882888 A1 EP 1882888A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
heat
refrigerant
pump system
particular
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.)
Withdrawn
Application number
EP06025558A
Other languages
German (de)
French (fr)
Inventor
Erwin Dietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dietz Erwin
Original Assignee
Erwin Dietz
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE202006011464 priority Critical
Application filed by Erwin Dietz filed Critical Erwin Dietz
Publication of EP1882888A1 publication Critical patent/EP1882888A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/06Heat pumps characterised by the source of low potential heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B40/00Subcoolers, desuperheaters or superheaters
    • F25B40/04Desuperheaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/003Indoor unit with water as a heat sink or heat source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/023Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/027Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741Compression machines, plant, or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/31Low ambient temperatures

Abstract

The system has two heat exchangers (4, 7) switched with respect to an order of flow with a cooling medium relative to each other and with respect to an expansion valve (8). The heat exchanger (4) is operated as a vaporizer, and the heat exchanger (7) is operated as a condenser in a switching condition of a directional reversing valve (11). The heat exchanger (7) is operated as a condenser and the heat exchanger (4) is operated as the vaporizer in another switching condition of the reversing valve.

Description

  • The invention generally relates to a heat pump system and in particular to a system for air conditioning of a building, a vehicle or an aircraft.
  • Heat pumps, also called steam chillers, are known. They absorb a heat flow at a low temperature and, together with the consumption of the work required for compaction, dissipate it at a higher temperature than the heat flow. Such chillers therefore transport heat against a temperature gradient and consume energy for this purpose. From heat pump the expert speaks when the chiller is used for heating. If it is used for cooling, the skilled person speaks of a refrigerating machine. However, it is also common to refer to such systems as heat pump systems, which are used both for heating and for cooling, as it relates to the present invention according to one embodiment.
  • Especially in the air conditioning, especially heating, of buildings is nowadays due to the high energy prices strive to make optimum use of the energy available in or outside the building. This was done in the DE 20 2004 008 964 U1 already proposed to provide two parallel and independently operating changing units of evaporators and condensers in a heat cycle of a heat engine, the two change units with their evaporators and condensers can be functionally changed via a partial circuit reversing valve so that the evaporator to a condenser and the condenser becomes an evaporator. However, the heat cycle shown is very complex and has a variety of switching, expansion and check valves to achieve the desired heat flows. On the one hand, the complexity leads to high manufacturing and maintenance costs and on the other hand predetermines fixed temperature levels in the individual heat transfer units.
  • The present invention has for its object to provide a heat pump system, in particular for the air conditioning of a building, which on the one hand has a simple and inexpensive construction and on the other hand optimally utilizes existing energy.
  • The object of the invention is achieved by a heat pump system with the features of claim 1. The dependent claims describe advantageous and particularly expedient embodiments of the invention.
  • The heat pump system according to the invention can be executed both as a building heat pump system, vehicle heat pump system or aircraft heat pump system. Of course, other objects can be heated and / or cooled by means of a heat pump system according to the invention.
  • Deviating from the cited prior art, the heat pump according to the invention a refrigerant circuit, in particular a single refrigerant circuit, in which a compressor, an expansion valve and a plurality of heat exchangers are connected in series, that is, the heat exchangers are successively from the refrigerant of the refrigerant circuit flows through. Of these successively flowed through heat exchangers, at least a first heat exchanger and a second heat exchanger both a capacitor function and an evaporator function, that is, each of the two heat exchanger operates in a first switching state with removal of heat from the refrigerant as a condenser and in a second switching state Supply of heat in the refrigerant as an evaporator. Whenever the first heat exchanger works as a condenser, the second works as an evaporator and vice versa.
  • The switching state of the two heat exchangers is determined on the one hand by the order in which they are flowed through successively. To the Others, the switching state is determined by whether the refrigerant flows first through the provided in the refrigerant circuit expansion valve and then through the corresponding heat exchanger or first through the heat exchanger and then through the expansion valve.
  • The setting of the flow direction or the change of the sequence of flow, both the order of the two heat exchangers relative to each other and the flow order with respect to the expansion valve is determined by a provided in the refrigerant circuit direction reversing valve, which in a first switching position, the first heat exchanger as the evaporator and the second heat exchanger can work as a condenser and in a second switching position the first heat exchanger as a condenser and the second heat exchanger as an evaporator.
  • According to the invention, at least one third heat exchanger is also provided, which has a desuperheater and / or condenser function for the refrigerant flowing through it in the refrigerant circuit.
  • According to a particularly advantageous embodiment of the invention, a fourth and in particular a fifth heat exchanger are provided in the refrigerant circuit flows through the refrigerant, which may be, for example, in their function and / or identical to the third heat exchanger. Also, the fourth and in particular the fifth heat exchanger each have a desuperheater and / or condenser function. Particularly advantageously, the third, the fourth and in particular the fifth heat exchanger in the refrigerant circuit are connected in immediate succession, that is, the output of the third heat exchanger is connected exclusively via a pipe or a flow channel to the input of the fourth heat exchanger, and the output of the fourth heat exchanger is particularly exclusive connected via a pipe or via a flow channel with the input of the fifth heat exchanger. The pipelines or the Flow channels can be carried out substantially free of pressure losses and in particular free of valves and the like.
  • The amount of heat removed from the refrigerant in the individual heat exchangers (third through fifth heat exchangers) can be determined by a predetermined supply of a heat carrier, for example a liquid, in particular water, on a secondary side of those heat exchangers. The heat capacity or the mass flow of the secondary-side liquid determines the heat flow absorbed by the refrigerant. By means of a mass flow control, for example by means of a pump, it can thus be determined whether and how much heat per unit of time is removed from the refrigerant in the corresponding heat exchanger.
  • For example, the third heat exchanger can be connected via a fluid circuit with a service water boiler loading pump with a domestic water boiler for heating domestic water.
  • The fourth heat exchanger may, for example, be arranged in a heating circuit, in particular a high-temperature heating circuit, with a heating-circuit pump.
  • The fifth heat exchanger may, for example, be arranged in a heating circuit, in particular a low-temperature heating circuit, with a heating-circuit pump.
  • The temperature level at the respective outlet of the individual heat exchangers is thus determined solely by the secondary heat dissipation with respect to the individual heat exchangers. For example, the third and in particular the fourth heat exchanger, depending on the amount of heat removed, as a desuperheater and the fifth heat exchanger to work as a capacitor. In contrast, when a larger quantity of heat removed in the third heat exchanger, only the third heat exchanger works as a desuperheater and in particular at the same time as a condenser, whereas the fourth and the fifth heat exchanger work without heat transfer or as additional capacitors. The de-icing function in the heat exchangers three to five may thus be referred to as sliding.
  • For example, if the third heat exchanger already works as a condenser and thus in this a significant amount of heat is transferred to the liquid circuit with the domestic water boiler, large amounts of hot water can be heated. In another switching state, the heat energy transported by the refrigerant is distributed to a plurality of heat exchangers, for example the third, fourth and fifth heat exchangers. The usable heat energy in the refrigerant, which is composed of the compression work and the heat energy received in the condenser in the flow direction before the expansion valve, wherein in particular an additional heat input into the refrigerant via one or more operating as an evaporator heat exchanger (for cooling), for example, is 10 up to 30 kW, especially 20 kW.
  • Of course, it is also possible, in any of the heat exchangers with desuperheater and / or condenser function (third to fifth heat exchanger) dissipate heat from the refrigerant, if no corresponding heat demand is present. In such a case, the condenser operates in front of the expansion valve as the desuperheater and condenser (condenser) for the refrigerant.
  • The inventive solution, it is thus possible, a plurality of series-connected heat exchanger due to a variable heat dissipation from the refrigerant in the individual heat exchangers, in particular by a variable secondary side mass flow (based on the heat exchanger) optimally in their performance from 0 to 100 percent to use adjustable, and set the desuperheating and liquefaction of the gaseous refrigerant targeted in one or more of the heat exchanger.
  • The invention will be explained below by way of example with reference to an embodiment.
  • Show it:
  • FIG. 1
    an inventive embodiment of a heat pump system for air conditioning of a building in an operating condition with air and / or water cooling;
    FIG. 2
    the heat pump system of Figure 1 with a modified flow direction and heating the previously cooled air or the previously cooled water.
  • FIG. 1 shows the refrigerant circuit 1, in which a compressor 10 (refrigerant compressor) and three heat exchangers, namely the third heat exchanger 24, the fourth heat exchanger 19 and the fifth heat exchanger 16, are arranged directly behind one another in the flow direction. In the flow direction behind the fifth heat exchanger 16, a direction reversing valve 11 is arranged, which determines whether the emerging from the fifth heat exchanger 16 refrigerant first through the second heat exchanger 7, which then works as a capacitor (shown in Figure 1), or the first heat exchanger. 4 , which then operates as a condenser (shown in FIG. 2).
  • After flowing through the working as a condenser heat exchanger - the second heat exchanger 7 in the switching position in Figure 1 and the first heat exchanger 4 at the switching position in Figure 2 - the refrigerant flows directly into the expansion valve eighth
  • From the expansion valve 8, the refrigerant then flows through the working as an evaporator heat exchanger - the first heat exchanger 4 in Figure 1 and the second heat exchanger 7 in Figure 2 - and then back to the compressor 10, which pumps the gaseous refrigerant into the compressed gas line 9.
  • The direction reversing valve 11 has, according to the embodiment shown, three connections, namely a fixed connection, via which the direction reversing valve 11 is connected to the last of the three heat exchangers 24, 19, 16, and two with respect to their flow direction reversible lines 5, 6, of which one each serves as a suction line for the compressor 10 and the other as a pressure line with not yet expanded refrigerant.
  • The first heat exchanger 4, which is designed as a refrigerant-air heat exchanger to cool the surrounding air inside the building (Figure 1) or to heat (Figure 2), a cold medium-liquid heat exchanger 2 is connected in parallel with which the liquid, in particular water, cooled (Figure 1) or heated (Figure 2) can be. For example, this liquid may be a liquid conducted through an air-conditioned ceiling.
  • According to the switching state shown in Figure 1, the refrigerant liquid flow with expanded refrigerant from the line 3 divides into two parallel streams, one of which is passed through the first heat exchanger 4 and the heat exchanger 2, before these two streams in the line 5 again be united. Of course, it is also possible to provide only one of the two heat exchangers 2, 4 or other refrigerant-air heat exchangers and / or refrigerant-liquid heat exchangers or other heat exchangers.
  • In the embodiment shown, the second heat exchanger 7, the expansion valve 8 and the compressor 10 and the direction reversing valve 11 are arranged in an outdoor unit 25, which is arranged outside of the building to be air conditioned or on the outside of the building. The third to fifth heat exchangers 24, 19, 16 and the first heat exchanger 4 and optionally, the cooling medium-liquid heat exchanger 2 are disposed within the building. The third heat exchanger 24 is connected via a water circuit heat transfer to a domestic water boiler 22. The water in the heat transferring circuit is circulated by the dhw boiler charge pump 23. Due to the power output of the service water boiler charge pump 23, the amount of water circulated in the water cycle between the third heat exchanger 24 and the domestic water boiler 22 and, hereunder, the amount of heat transferred from the third heat exchanger 24 to the domestic water boiler 22 is determined.
  • Alternatively, as indicated by the domestic water boiler 22 ', the fourth heat exchanger 24 may also be integrated directly in the domestic water boiler 22' for heating domestic water. In this case, the refrigerant of the refrigerant circuit 1 flows directly through the domestic water boiler 22 'to heat the domestic water in the domestic water boiler 22' in a refrigerant-water heat exchanger and thereby to deprive the refrigerant and optionally to condense.
  • The fourth heat exchanger 19 is connected to a high-temperature heating circuit 20. In this circuit, the circulated amount of water is determined by the heating circuit pump 21.
  • The fifth heat exchanger 16 is arranged in a low-temperature heating circuit 18. Here, the circulated amount of water via the heating circuit 17 is determined.
  • Since the second heat exchanger 7 provided in the outdoor unit 25 is designed as a refrigerant-air heat exchanger, which is flowed around or flowed through by outside air, the energy balance for heating the building becomes worse with decreasing outside air temperature. In the embodiment shown is - but this is not absolutely necessary - therefore a parallel to the second heat exchanger 7 heat exchanger 12th provided, which is designed as a refrigerant-water heat exchanger for a water-carrying ground probe. This heat exchanger 12 is connected via a suction line 13 to the refrigerant line before the refrigerant inlet of the compressor 10, and further connected via a fluid line 14 with an expansion valve 15 to the line between the last of the three heat exchangers 24, 19, 16 and the direction reversing valve 11.
  • Alternatively, if appropriate environmental protection measures are taken, the ground probe may also be implemented as a refrigerant-flowed ground probe. In this case, the refrigerant-water heat exchanger could be omitted and the soil probe itself would work as a heat exchanger connected in parallel to the second heat exchanger 7.
  • In order to be able to circulate particularly large volume flows in the refrigerant circuit 1, for example, an additional bypass around the first heat exchanger 4 may be provided from the line 5 to the line 3 (not shown). This bypass can be made entirely within the outdoor unit 25.

Claims (9)

  1. Heat pump system, in particular for the air conditioning of a building, vehicle or aircraft,
    1.1 with a refrigerant circuit (1) comprising a compressor (10), an expansion valve (8) and a plurality of heat exchangers (4, 7, 16, 19, 24), which are successively flowed through by a refrigerant in the refrigerant circuit (1) ;
    characterized in that
    1.2 a first heat exchanger (4) has a condenser function, a second heat exchanger (7) has an evaporator function, and a third heat exchanger (24) has a desuperheater and / or condenser function, at least of the heat exchangers flowed through in succession,
    1.3 in the refrigerant circuit (1) a direction reversing valve (11) is provided for the cooling medium, by means of which by changing the direction of flow in the refrigerant circuit (1) at least the first two heat exchangers (4, 7) with respect to the order of their flow with refrigerant relative to each other and with Reference to the expansion valve (8) are switchable such that the first heat exchanger (4) in a first switching position of the direction reversing valve (11) acts as an evaporator and the second heat exchanger (7) as a condenser, and in a second switching position of the direction reversing valve (11) the first heat exchanger (4) as a condenser and the second heat exchanger (7) operates as an evaporator.
  2. Heat pump system according to claim 1, characterized in that a fourth heat exchanger (19), in particular a fifth heat exchanger (16) and optionally further heat exchangers are connected in each case with desuperheater and / or condenser function in series in the refrigerant circuit (1) behind the third heat exchanger (24), to derive heat not derived from the third heat exchanger (24) at an equal or lower temperature level.
  3. Heat pump system according to one of claims 1 or 2, characterized in that the heat pump system is a building heat pump system, vehicle heat pump system or aircraft heat pump system having a primary side, which communicates with the environment in heat transfer communication, and a secondary side, with the interior of the building, the vehicle or the aircraft is in heat-transmitting connection, and the second heat exchanger (7) on the primary side, the first heat exchanger (4) on the secondary side and the third and in particular, fourth, fifth and optionally further heat exchangers (24, 19, 16) on the Secondary side are arranged.
  4. Heat pump system according to one of claims 1 to 3, characterized in that the first heat exchanger (4) and / or the second heat exchanger (7), a further heat exchanger (2, 12) is connected in parallel.
  5. Heat pump system according to one of claims 1 to 4, characterized in that the first and the second heat exchanger (4, 7) are designed as a refrigerant-air heat exchanger, and the third, in particular fourth and fifth heat exchanger (24, 19, 16) as Refrigerant-liquid heat exchanger, in particular refrigerant-water heat exchanger, are executed.
  6. Heat pump system according to claim 4 and claim 5, characterized in that the first heat exchanger (4) connected in parallel heat exchanger (2) is designed as a refrigerant-liquid heat exchanger, in particular refrigerant-water heat exchanger, and the second heat exchanger (7) connected in parallel heat exchanger (12) in particular as a refrigerant flowing through Soil probe or cold-water to water heat exchanger for a water-carrying ground probe is executed.
  7. Heat pump system according to one of claims 1 to 6, characterized in that the refrigerant circuit (1) is the only provided in the heat pump system refrigerant circuit with an at least partially gaseous refrigerant.
  8. Heat pump system according to one of claims 5 to 7, characterized in that the third heat exchanger (24) via a liquid circuit, in which a domestic water boiler loading pump (23) is provided, with a hot water boiler (22) for heating domestic water is connected, or the third heat exchanger (24) is integrated directly in a domestic water boiler (22) for the heating of process water.
  9. Heat pump system according to claim 2 and one of claims 5 to 8, characterized in that the fourth heat exchanger (19) in a heating circuit (20) with heating circuit pump (21) is arranged, and the fifth heat exchanger (16) in particular in a further heating circuit (18 ) is arranged with a further heating circuit pump (17).
EP06025558A 2006-07-26 2006-12-11 Heat pump system, in particular for air conditioning a building Withdrawn EP1882888A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE202006011464 2006-07-26

Publications (1)

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EP1882888A1 true EP1882888A1 (en) 2008-01-30

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EP06025558A Withdrawn EP1882888A1 (en) 2006-07-26 2006-12-11 Heat pump system, in particular for air conditioning a building

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018878B3 (en) * 2008-04-14 2009-10-15 Erwin Dietz Heat pump system for air conditioning of e.g. building, has heat exchangers arranged together in boiler for exchanging heat between cooling and heating mediums in exchangers, and direction reversal valve arranged between exchangers
DE102008038429A1 (en) 2008-08-19 2010-02-25 Erwin Dietz Heat pump system operating method for air conditioning e.g. building, involves determining coefficient of performance, performance number, efficiency or analysis of refrigerant based on mass flow of refrigerant
GB2484354A (en) * 2010-10-06 2012-04-11 Frito Lay Trading Co Gmbh Reheating oil in a fryer using heat exchangers
DE102010051465A1 (en) 2010-11-04 2012-05-10 Erwin Dietz Method for operating heat pump system for air conditioning of e.g. building, involves determining mass flow of refrigerant by e.g. determining actual pressure difference of refrigerant between vaporization pressure and condensation pressure
DE102010051868A1 (en) 2010-11-22 2012-05-24 Erwin Dietz Method for regulating heat pump system for air-conditioning e.g. airplane, involves regulating mass stream and/or volume stream of individual heat carrier streams permanently in dependent upon actual supply of utilized primary energy
WO2018189942A1 (en) * 2017-04-11 2018-10-18 日立ジョンソンコントロールズ空調株式会社 Air conditioner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269153A (en) 1991-05-22 1993-12-14 Artesian Building Systems, Inc. Apparatus for controlling space heating and/or space cooling and water heating
US5937665A (en) 1998-01-15 1999-08-17 Geofurnace Systems, Inc. Geothermal subcircuit for air conditioning unit
US20050252226A1 (en) 2004-05-12 2005-11-17 Seefeldt William J Heating/cooling system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5269153A (en) 1991-05-22 1993-12-14 Artesian Building Systems, Inc. Apparatus for controlling space heating and/or space cooling and water heating
US5937665A (en) 1998-01-15 1999-08-17 Geofurnace Systems, Inc. Geothermal subcircuit for air conditioning unit
US20050252226A1 (en) 2004-05-12 2005-11-17 Seefeldt William J Heating/cooling system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018878B3 (en) * 2008-04-14 2009-10-15 Erwin Dietz Heat pump system for air conditioning of e.g. building, has heat exchangers arranged together in boiler for exchanging heat between cooling and heating mediums in exchangers, and direction reversal valve arranged between exchangers
DE102008038429A1 (en) 2008-08-19 2010-02-25 Erwin Dietz Heat pump system operating method for air conditioning e.g. building, involves determining coefficient of performance, performance number, efficiency or analysis of refrigerant based on mass flow of refrigerant
GB2484354A (en) * 2010-10-06 2012-04-11 Frito Lay Trading Co Gmbh Reheating oil in a fryer using heat exchangers
GB2484354B (en) * 2010-10-06 2013-02-06 Frito Lay Trading Co Gmbh Apparatus for and method of heating an operating fluid
US9055840B2 (en) 2010-10-06 2015-06-16 Frito-Lay Trading Company Gmbh Apparatus for and method of heating an operating fluid
AU2011311526B2 (en) * 2010-10-06 2016-02-04 Frito-Lay Trading Company Gmbh Apparatus for and method of heating an operating fluid
DE102010051465A1 (en) 2010-11-04 2012-05-10 Erwin Dietz Method for operating heat pump system for air conditioning of e.g. building, involves determining mass flow of refrigerant by e.g. determining actual pressure difference of refrigerant between vaporization pressure and condensation pressure
DE102010051868A1 (en) 2010-11-22 2012-05-24 Erwin Dietz Method for regulating heat pump system for air-conditioning e.g. airplane, involves regulating mass stream and/or volume stream of individual heat carrier streams permanently in dependent upon actual supply of utilized primary energy
WO2018189942A1 (en) * 2017-04-11 2018-10-18 日立ジョンソンコントロールズ空調株式会社 Air conditioner

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