EP0866291B1 - Kompressionswärmepumpe oder Kompressionskältemaschine und Regelungsverfahren dafür - Google Patents
Kompressionswärmepumpe oder Kompressionskältemaschine und Regelungsverfahren dafür Download PDFInfo
- Publication number
- EP0866291B1 EP0866291B1 EP98104767A EP98104767A EP0866291B1 EP 0866291 B1 EP0866291 B1 EP 0866291B1 EP 98104767 A EP98104767 A EP 98104767A EP 98104767 A EP98104767 A EP 98104767A EP 0866291 B1 EP0866291 B1 EP 0866291B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensor
- compression
- temperature
- heat pump
- condenser
- 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.)
- Expired - Lifetime
Links
- 230000006835 compression Effects 0.000 title claims abstract description 30
- 238000007906 compression Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 5
- 238000001816 cooling Methods 0.000 title description 2
- 238000009833 condensation Methods 0.000 claims abstract description 21
- 230000005494 condensation Effects 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000002826 coolant Substances 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 15
- 238000005057 refrigeration Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000010725 compressor oil Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Images
Classifications
-
- 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
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
-
- 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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/063—Feed forward expansion valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/195—Pressures of the condenser
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2116—Temperatures of a condenser
- F25B2700/21163—Temperatures of a condenser of the refrigerant at the outlet of the condenser
Definitions
- the invention relates to a compression heat pump or compression refrigeration machine according to the preamble of claim 1.
- the invention further relates to a Method for controlling such a compression heat pump or compression refrigeration machine.
- Devices according to the preamble of claim 1 are from DE-OS 43 03 533 and WO 96/24016. With these, the regulation is primarily also based on the evaporator superheat temperature, as a secondary
- the control parameter is also the hot gas temperature, i.e. the temperature of the Refrigerant measured in the area between the compressor and condenser, whereby at an inadmissibly high hot gas temperature, the expansion valve is opened further and the hot gas temperature is thereby lowered.
- a disadvantage of the known control of the expansion valve based on the evaporator superheating temperature is that the temperature differences used for the control are only very small, so that the regulation is usually only very rough takes place because of a more precise regulation that the facility becomes too expensive would lead.
- the object of the invention is a compression heat pump or compression refrigerator to provide the type mentioned at the outset, which without price increases allows the apparatus to control the expansion valve much more precisely. According to the invention, this is achieved by a compression heat pump or a compression refrigerator with the features of claim 1.
- the device according to the invention is therefore to regulate the expansion valve arranged next to the first in the area between the compressor and the condenser Temperature sensor provided a second sensor that detects a value that is a direct one Represents a measure of the condensation temperature. Taking a direct measure for that Condensation temperature is understood to mean that for a given apparatus Arrangement from the value recorded by the second sensor without using further measured variables reflecting the current state of the system at least approximately the condensation temperature can be determined.
- the second sensor designed as a pressure sensor and in the high-pressure area of the refrigerant circuit thus arranged in the area between the compressor and expansion valve. From the dated The pressure recorded by the sensor will directly maintain the condensation temperature.
- the second sensor as a temperature sensor and to be placed directly on the capacitor, in an area of the same, in which, as far as possible, approximately the condensation temperature under all operating conditions appropriate temperature is present.
- the second sensor is one in the flow line of the heating circuit arranged temperature sensor.
- the one recorded by this sensor Temperature deviates only a few degrees Kelvin from the condensation temperature and can use a correction factor in the condensation temperature can be converted.
- the controlled variable varies significantly more than with a control
- the expansion valve can be regulated based on the evaporator superheating temperature in the device according to the invention without large apparatus Additional effort can be carried out much more precisely.
- Controlled variable the difference between the two determined by the two sensors Temperature values used.
- the refrigerant circuit of the compression heat pump shown schematically in FIG. 1 comprises an evaporator 1, a compressor 2, a condenser 3 and an expansion valve 4.
- the refrigerant is evaporated in the evaporator, one Amount of heat 5 is absorbed by the environment. That compressed by the compressor 2 Hot gas condenses in the condenser designed as a heat exchanger, wherein an amount of heat 6 is given to the heating circuit 7.
- An optimal efficiency of the compression heat pump is achieved if that Refrigerant in the evaporator 1 is overheated as little as possible.
- a small amount of non-evaporated refrigerant is irrelevant since the compressor is cooled by suction gas Compressor is formed, i.e. Engine heat is drawn to the intake gas emitted, remnants of coolant are evaporated.
- the refrigerant however not heated enough when liquid refrigerant gets into the compressor oil and the oil in the compressor starts to foam. In this case, the supply of Refrigerant in the evaporator 1 is reduced by throttling the expansion valve 4 become.
- a control device 8 is provided, which is connected to a temperature sensor 9 and a second sensor 10.
- the first sensor 9 is used to record the hot gas temperature of the refrigerant in the area between the compressor 2 and the condenser 3.
- the second sensor 10 is arranged in the high pressure area, which extends from the compressor 2 to the expansion valve 4, and is designed as a pressure sensor.
- the value of the pressure detected by the second sensor 10 corresponds to the condensation pressure of the refrigerant in the condenser 3 and can be converted directly into the condensation temperature in the condenser.
- the actual value of the controlled variable is determined in the control device 8 from the difference between the temperatures determined by the two sensors.
- the expansion valve 4 is opened further by the control device 8.
- the control device 8 As a result, more refrigerant flows through the evaporator, which results in a lower vaporization superheating temperature of the gaseous refrigerant in the suction gas line 11 and thus also a lower hot gas temperature of the refrigerant in the area between the compressor 2 and the condenser 3, the change in the vaporization superheating temperature being substantially less is than the change in hot gas temperature.
- the target value of the difference between the hot gas temperature determined by the first sensor 9 and the condensation temperature determined via the second sensor 10 becomes dependent on the condensation temperature determined via the second sensor 10 set, preferably proportional to this.
- the reasons for introducing such a dependency are different Amounts of heat at different condensation temperatures in the condenser 3 must be dissipated and the resulting different requirements to the capacitor.
- the hot gas is initially in one in the condenser in the first heating zone (e.g. from 70 to 50 ° C), then in a condensation zone condensed (e.g.
- the second sensor 10 is designed as a temperature sensor and in the flow line 13 of the Heating circuit 7 is arranged in the region of the heat exchanger outlet.
- the second Sensor 10 recorded temperature differs from the condensation temperature only by a few degrees Kelvin and can be entered into this by means of a constant Correction factor (which essentially depends on the refrigerant used and on the Dimensioning of the heat exchanger depends) can be converted.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Description
- die Fig. 1
- eine schematische Darstellung eines ersten Ausführungsbeispieles einer erfindungsgemäßen Kompressionswärmepumpe und
- die Fig. 2
- eine schematische Darstellung eines zweiten Ausführungsbeispieles einer erfindungsgemäßen Kompressionswärmepumpe.
Claims (7)
- Kompressionswärmepumpe oder Kompressionskältemaschine mit einem Kältemittelkreislauf, der einen Verdampfer (1), einen Verdichter (2), einen Kondensator (3) und ein regelbares Expansionsventil (4) umfaßt, welches von einer Regeleinrichtung (8) angesteuert wird, die mit einem im Bereich zwischen Verdichter (2) und Kondensator (3) angeordneten Temperaturfühler (9) und einem zweiten Fühler (10) verbunden ist, dadurch gekennzeichnet, daß der zweite Fühler (10) einen Wert erfaßt, der ein direktes Maß für die Kondensationstemperatur im Kondensator (3) darstellt.
- Kompressionswärmepumpe oder Kompressionskältemaschine nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Fühler (10) ein Druckaufnehmer ist und im Hochdruckbereich des Kältemittelkreislaufes zwischen Verdichter (2) und Expansionsventil (4) angeordnet ist.
- Kompressionswärmepumpe oder Kompressionskältemaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Kondensator (3) der Kompressionswärmepumpe als Wärmetauscher zur Übertragung der vom Kältemittel abgegebenen Wärme (6) auf ein Heizmittel eines Heizkreises (7) ausgebildet ist und der zweite Fühler (10) als Temperaturfühler ausgebildet ist, der in der Vorlaufleitung (13) des Heizkörpers, vorzugsweise im Bereich des Wärmetauscherausganges, angeordnet ist.
- Kompressionswärmepumpe oder Kompressionskältemaschine nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Fühler (10) ein Temperaturfühler ist und am Kondensator (3) angeordnet ist.
- Verfahren zur Regelung einer Kompressionswärmepumpe oder Kompressionskältemaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Regelgröße aus der Differenz zwischen der vom ersten Fühler (9) erfaßten Temperatur und einer Temperatur, die dem vom zweiten Fühler (10) erfaßten Wert entspricht und ein direktes Maß für die Kondensationstemperatur im Kondensator darstellt, gebildet wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß der Sollwert der Regelgröße von dem vom zweiten Fühler (10) erfaßten Wert abhängig ist, vorzugsweise mit steigendem vom zweiten Fühler erfaßten Wert zunimmt.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der Sollwert der Regelgröße etwa proportional zu dem vom zweiten Fühler (10) ermittelten Wert ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT46797 | 1997-03-18 | ||
AT46797 | 1997-03-18 | ||
AT467/97 | 1997-03-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0866291A1 EP0866291A1 (de) | 1998-09-23 |
EP0866291B1 true EP0866291B1 (de) | 2002-08-14 |
Family
ID=3491393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98104767A Expired - Lifetime EP0866291B1 (de) | 1997-03-18 | 1998-03-17 | Kompressionswärmepumpe oder Kompressionskältemaschine und Regelungsverfahren dafür |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0866291B1 (de) |
AT (1) | ATE222344T1 (de) |
DE (1) | DE59805146D1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013004786A1 (de) | 2013-03-20 | 2014-09-25 | SKA GmbH Gesellschaft für Kältetechnik | Kompressionswärmepumpe oder Kompressionskältemaschine sowie Verfahren zur Regelug derselben |
DE102020122713A1 (de) | 2020-08-31 | 2022-03-03 | Andreas Bangheri | Wärmepumpe und Verfahren zum Betreiben einer Wärmepumpe |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6318101B1 (en) * | 2000-03-15 | 2001-11-20 | Carrier Corporation | Method for controlling an electronic expansion valve based on cooler pinch and discharge superheat |
EP1148307B1 (de) * | 2000-04-19 | 2004-03-17 | Denso Corporation | Wassererhitzer mit Wärmepumpe |
US6948326B2 (en) | 2003-04-30 | 2005-09-27 | Lg Electronics Inc. | Apparatus for controlling operation of outdoor unit and its method |
KR100827876B1 (ko) * | 2003-05-15 | 2008-05-07 | 엘지전자 주식회사 | 실외기의 안전운전장치 및 방법 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3801711A1 (de) * | 1988-01-21 | 1989-07-27 | Linde Ag | Verfahren zum betreiben einer kaelteanlage und kaelteanlage zur durchfuehrung des verfahrens |
JPH05106922A (ja) * | 1991-10-18 | 1993-04-27 | Hitachi Ltd | 冷凍装置の制御方式 |
DE4303533A1 (de) | 1993-02-06 | 1994-08-11 | Stiebel Eltron Gmbh & Co Kg | Verfahren zur Begrenzung der Heißgastemperatur in einem Kältemittelkreislauf und Expansionsventil |
US5551248A (en) | 1995-02-03 | 1996-09-03 | Heatcraft Inc. | Control apparatus for space cooling system |
EP0762064A1 (de) * | 1995-09-08 | 1997-03-12 | Fritz Ing. Weider | Durchsatzregelung für das Kältemittel einer Wärmepumpe und Verfahren |
-
1998
- 1998-03-17 EP EP98104767A patent/EP0866291B1/de not_active Expired - Lifetime
- 1998-03-17 AT AT98104767T patent/ATE222344T1/de active
- 1998-03-17 DE DE59805146T patent/DE59805146D1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013004786A1 (de) | 2013-03-20 | 2014-09-25 | SKA GmbH Gesellschaft für Kältetechnik | Kompressionswärmepumpe oder Kompressionskältemaschine sowie Verfahren zur Regelug derselben |
DE102020122713A1 (de) | 2020-08-31 | 2022-03-03 | Andreas Bangheri | Wärmepumpe und Verfahren zum Betreiben einer Wärmepumpe |
Also Published As
Publication number | Publication date |
---|---|
ATE222344T1 (de) | 2002-08-15 |
DE59805146D1 (de) | 2002-09-19 |
EP0866291A1 (de) | 1998-09-23 |
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