EP3483529B1 - Schmiermittelüberwachungssystem für einen kreislaufverdichter - Google Patents

Schmiermittelüberwachungssystem für einen kreislaufverdichter Download PDF

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Publication number
EP3483529B1
EP3483529B1 EP18205135.9A EP18205135A EP3483529B1 EP 3483529 B1 EP3483529 B1 EP 3483529B1 EP 18205135 A EP18205135 A EP 18205135A EP 3483529 B1 EP3483529 B1 EP 3483529B1
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EP
European Patent Office
Prior art keywords
compressor
delivery
pressure
monitoring device
circuit
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Active
Application number
EP18205135.9A
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English (en)
French (fr)
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EP3483529A1 (de
Inventor
Giuseppe Vitri
Giampietro SCAVOLINI
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Rivacold Srl
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Rivacold Srl
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Publication date
Application filed by Rivacold Srl filed Critical Rivacold Srl
Priority to SI201830147T priority Critical patent/SI3483529T1/sl
Priority to PL18205135T priority patent/PL3483529T3/pl
Publication of EP3483529A1 publication Critical patent/EP3483529A1/de
Application granted granted Critical
Publication of EP3483529B1 publication Critical patent/EP3483529B1/de
Priority to HRP20201925TT priority patent/HRP20201925T1/hr
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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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/005—Arrangement or mounting of control or safety devices of safety devices
    • 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
    • F25B31/00—Compressor arrangements
    • F25B31/002—Lubrication
    • F25B31/004—Lubrication oil recirculating arrangements
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/06—Damage
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/16—Lubrication
    • 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
    • F25B2600/00—Control issues
    • F25B2600/23—Time delays
    • 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
    • F25B2700/15—Power, e.g. by voltage or current
    • F25B2700/151—Power, e.g. by voltage or current of the compressor motor
    • 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
    • F25B2700/17—Speeds
    • F25B2700/171—Speeds 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
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures

Definitions

  • the present invention relates to lubricant monitoring system of a compressor of a refrigerating circuit particularly but not exclusively suitable for hermetic compressors and not of a refrigerating circuit.
  • refrigerant circuits provided with hermetic rotary compressors such as the rotary vane compressor where the cylindrical piston rotating about its own geometric axis is provided with at least one radially movable vane and rotates inside a cylindrical seat offset with respect to the rotation and geometric axis of the piston and where the chambers delimited by one or two adjacent vanes and by the facing cylindrical surfaces of the chamber and of the piston have a volume which cyclically passes from a maximum value to a minimum value; said chamber is provided with an inlet, or a suction or intake port, and of an exit, or a delivery port, positioned so as to take advantage of room volume changes to compress incoming gas.
  • hermetic compressors and other types of hermetic and non-hermetic compressors are often without any checking means of lubricating oil level, for example of a transparent window type, a rod, a level sensor or oil pressure lubricant, etc.
  • compressors for refrigeration systems may be equipped with means for checking the oil level, but these means may be placed in positions that are inaccessible or the plant may not be guarded by personnel assigned to check the oil level.
  • a disadvantage of such known systems and compressors consists in that the lack of oil verification means or of direct control of said means can lead to their operation with an insufficient oil (or lubricant in general) level or quantity so causing a very rapid deterioration and seizure of compressor with consequent plant shutdown, so that, in addition to requiring the replacement or repair of compressor, may cause deterioration of goods or materials whose conservation or proper functioning was entrusted to the plant itself.
  • An object of the present invention is to propose a lubricant monitoring system of a compressor of a refrigerating circuit applied to lubricated compressors of hermetic and non-hermetic type, of eccentric piston type, of rotary piston, of reciprocating piston, and similar compressors or of any other type, without needing the internal access to compressor for checking the lubricant state or presence and without physical intervention on the compressor itself.
  • Another object is to propose a system fit for emitting alarm signals of any kind, even digital and remotely, in case of insufficient lubricant quantity.
  • a further object is to propose a system capable of deactivating and/or switching off the compressor whose lubricant level is insufficient.
  • Another object is to propose a system that can be implemented both in new plants and on already installed systems.
  • a further object is to propose a system that is also suitable for compressors in systems equipped with several compressors, with sections at low, medium and high temperatures and in heat pump systems.
  • Said compressor 10 has a sensor detecting the lubricant oil pressure (element 44 of figure 1 of document N.
  • US 5 209 076 A for providing the system with oil pressure data used by the system to detect abnormal conditions of the lubricant oil or troubles and to generate an alarm when said abnormal conditions occur.
  • US 5 209 076 A discloses a monitoring system according to the preamble of claim 1.
  • the oil check (option 132, conditional step 134 of figure 3 and diagram of figure 6 of document N. US 5 209 076 A ) provides, as at lines 56-60 of column 3 of document N. US 5 209 076 A , the use of a pressure transducer 44 sensing the pressure of the lubricating oil that is used for lubrication of the compressor 10 and provides oil pressure information to the device 38. Said system generates an alarm if the oil pressure doesn't reach or overpass a preset threshold within a predetermined time span, as in manostat, but without providing any indications related to lubricant oil if the compressor is not provided from the beginning or has an internal sensor of the lubricant pressure.
  • the possible outlet compressed gas pressure sensor of document N. US 5 209 076 A is provided for stopping the compressor in case of high pressure (fig. 7 of document N. US 5 209 076 A ) and it doesn't cooperate to oil checking.
  • WO 96/39601 A1 refers to an apparatus and method to determine and to control the oil level in one or more refrigeration system compressors (14, 18).
  • the invention of document WO 96/39601 A1 returns lubricating oil to compressors to maintain oil levels sufficient for proper lubrication of each compressor, and also monitors the flow rate of oil returned to each individual compressor.
  • a level sensor (93, 94) and a flow control device (88) are connected to a control circuit (56) to control the flow of lubricating oil returning to the compressors.
  • Prior art document EP 2 690 379 A1 refers to a heat pump circuit whose output gas pressure is continuously (during the compressor operative condition) monitored to detect possible instability thereof and to provide information on possible oil trapping into the circuit, but without detecting a possible lack of oil quantity
  • the numeral 1 indicates the lubricant monitoring system of a compressor 3 of a refrigerant circuit 2 and object of the present invention.
  • the circuit 2 can preferably be of the refrigerator and/or heat pump type with one or more compressors, one or more stages and with sections fit to supply a single user or several users requiring different values of cooling capacity or temperature.
  • Figure 1 shows a principle schematic view of a single compressor refrigerating system, but the invention is not limited to this type of circuit being practicable immediately in any type of refrigeration system or other type using compressors or pumps.
  • the compressor 3 can be of almost any type with or without checking means of lubricating oil level and in the following it will be made reference to hermetic compressor of eccentric piston type on which many tests have been carried out and to which Figures 2 and 3 refer.
  • lubricant will be used to indicate the lubricating oil and any other and different types of lubricants used in the compressor.
  • the compressor is equipped with an intake 5 for the input of compressible fluid (for example consisting of a refrigerating fluid at gaseous state such as CO 2 or of other fluid that is in gaseous phase at least in some conditions or portions of the circuit 2) and with a delivery 9 for the compressed compressible fluid outlet.
  • compressible fluid for example consisting of a refrigerating fluid at gaseous state such as CO 2 or of other fluid that is in gaseous phase at least in some conditions or portions of the circuit 2
  • delivery 9 for the compressed compressible fluid outlet.
  • the compressor can be equipped with one or more accumulators and several other known optional elements, in particular with an internal or external by-pass 29 provided with a closing valve which can be operated by the control means (not shown) of the circuit which, as better reported below, when the compressor motor is switched off, closes the valve of this by-pass, preventing flows through it.
  • the by-pass is active during start-up so allowing the compressor to start; during operation the bypass is closed.
  • the by-pass is closed so allowing to evaluate the delivery pressure drop and therefore the pressure inside the compressor.
  • the compressor is preferably of an electric type whose electrical power is controlled, at least when switched off and on, by the circuit control means.
  • the refrigerant monitoring system of the compressor 3 of the refrigeration circuit 2 comprises a state detector 11 for the compressor switching on or off, or for supplying or not supplying the compressor motor.
  • This state detector 11 may comprise a rotation detector of the motor axis (for example by inverter) or a voltage detector on the motor terminal or it may consist of the signal source, for switching on and off the compressor motor, which is provided in the circuit control means.
  • the system is also equipped with a pressure sensor 13 of compressible working fluid of the circuit, where said pressure sensor 13 is located at the delivery 9 of compressor 3 or immediately downstream of said delivery, the pressure sensor 13 it is therefore intended to provide an analog or digital signal representative of the pressure values of the compressible fluid outgoing the compressor delivery. Since the delivery 9 is in direct connection with the high pressure chamber of the compressor 3, lubricated by the lubricant, the pressure measured by the pressure sensor 13 at the delivery 9 corresponds to the pressure in the high pressure chamber.
  • the state detector 11 and the pressure sensor 13 are connected to a monitoring device 15 to provide the latter with data respectively on the operating status of the compressor 3 and on the compressible fluid pressure at the compressor delivery 9.
  • compressors and known circuits are originally provided with an own pressure detector of working fluid flowing from the delivery 9 of compressor 3 and said detector being intended, for example, to control this pressure by providing analogue or digital measurements to an electrical or electronic appliance for controlling said compressors and known circuits.
  • the pressure sensor 13 of the system of the invention can consist of said pressure sensor of the compressed working fluid coming out from the compressor delivery and the electrical signals, analog or digital, of said detector are sent to said monitoring device 15, being connected to the detector and acting as a pressure sensor 13; alternatively, for example, with a compressor without a compressible working fluid pressure detector at delivery or with a detector not suitable for supplying signals or data to the monitoring device 15, the inventive system provides for application at the delivery or at the compressor delivery manifold of an own and specific pressure sensor 13.
  • the lubricant level or its insufficiency are estimated on the basis of the compressible fluid pressure at the compressor outlet without direct or indirect access to oil or other lubricant.
  • the monitoring device 15 may be an independent entity that can be connected to the circuit control means, for example for acquiring the compressor on or off status, or the monitoring device 15 can be integrated with the circuit control means.
  • monitoring device 15 When monitoring device 15 detects that the compressor status changes from on to off, it records the flow of the working fluid pressure at delivery 9 supplied by pressure sensor 13 or detects one or more parameters of this flow, for example TSa time, counted starting from the compressor shutdown, necessary in order that the delivery pressure value to stabilize on a nearly constant value.
  • TSa time time, counted starting from the compressor shutdown, necessary in order that the delivery pressure value to stabilize on a nearly constant value.
  • the behavior is different with or without oil. If gas passes between the internal seals (seals between compressor delivery and intake), then the pressure drop in the compressor delivery chamber is rapid if, on the contrary, oil passes, this drop is slow.
  • the monitoring device 15 performs, by means of one or more algorithms stored therein, a comparison between the working pressure of the compressible working fluid at the delivery 9 starting from this detection of the stop instant and a predetermined flow memorized therein.
  • the monitoring device 15 emits at least one low level alarm signal of the lubricating oil.
  • the time interval TSa required for stabilizing said pressure in the compressor with the maximum amount of lubricant is greater than the duration of the time interval TSm required for stabilizing such pressure in the compressor with the minimum amount of lubricant (comparing TSa and TSm times in Figures 2 and 3 it can be taken into account the scale diversity of the respective abscissas axes which flattens the differences in such times and flows).
  • the monitoring device 15 detects a minimum (or insufficient) lubricant condition and emits at least said low level alarm signal of oil or of other lubricant.
  • the monitoring device 15 compares the pressure flows by comparing the time required to the pressure of the compressible fluid at the delivery 9 to stabilize or, alternatively, to reach a predetermined standard value, with corresponding time values.
  • the first phase is also reduced until reaching the flow of Figure 3 corresponding to the minimum amount of lubricating oil and in which the first phase has almost disappeared.
  • the calculation of the first and/or second derivatives (for example carried out by calculating the pressure differentials at appropriate sampling time intervals) of the time flow of pressure at the delivery after the compressor has been switched off at particular times starting from that shutdown or for all the flow makes it possible to evaluate the achievement of the minimum acceptable lubricant amount, for example a high absolute value of the first derivative shortly after the compressor switching off or a second derivative corresponding to a concavity almost always turned upwards indicate that the lubricating oil amount in the compressor is minimal or low.
  • the monitoring device 15 can compare the pressure flows by comparing the values of the first and/or second derivatives at certain time intervals or their average values in one or more time intervals or the integrals of such flows starting from the extinction instant until the moment in which the pressure of the compressible fluid at the delivery 9 stabilizes or reaches a predetermined value.
  • one or more predetermined reference flows of the pressure at the delivery can be stored, which can be selected according to the lubricant type and/or to the operating conditions or is memorized in the monitoring device 15 one or more real pressure flows to the delivery detected following to the compressor shutdown in real operating conditions in which the compressor contains the maximum amount of lubricating oil.
  • the monitoring device 15 following to the compressor switching off, operates each connection and by-pass closing between intake and delivery of the compressor.
  • the system also comprises a non-return valve 17 placed immediately downstream of the delivery 9 and assigned to prevent flows towards the delivery which could change the pressure flow measured at the delivery 9 by the pressure sensor 13.
  • the system may comprise a closing valve of the circuit placed downstream of the delivery and actuated in closing by the control means of the circuit, or by the monitoring device 15, when the compressor is switched off.
  • the monitoring device 15 is preferably of microprocessor-programmable digital type and provided with input ports at least for the signals provided by the state detector 11 and by the pressure sensor 13 and with at least one output port for the alarm signal for the activation of acoustic and/or optical alarms and with an optional door for the closing command of the optional closing valve of the circuit, if provided.
  • the monitoring device 15 can be provided with a digital output connected to transmission means, for example of a wired local network or wireless type or of a type for remote communications, and in said alarm case (that is, a discrepancy between the two detected and reference flows, higher than a predetermined threshold) sends through said transmission means an alarm signal in digital form to at least one local or remote operating center.
  • transmission means for example of a wired local network or wireless type or of a type for remote communications
  • the monitoring device 15 can be provided with a control output directly or indirectly connected, to electrical supply dissection means 18 of the compressor to shut off the latter in correspondence with the generation of an alarm signal regardless of the circuit control means.
  • the monitoring device 15 can be provided with a control output connected, directly or indirectly, to circuit reserve compressors for the activation of the latter in correspondence with the generation of the alarm signal.
  • the circuit 2 and the working fluid are of refrigerating type and said circuit comprises, in addition to the compressor 3 or to the compressors and starting from the respective deliverys at least one condenser or gas cooler 21, a capillary or rolling valve 23, and an evaporator 25.
  • the circuit may be provided with a condenser or a with gas cooler depending on the type of refrigerating fluid used, in particular, if CO 2 is used as working fluid, the circuit will be provided with a gas cooler or a CO 2 cooling exchanger, in the following the term exchanger will be used to indicate both: exchanger and gas cooler.
  • the circuit 2 can further comprise at least one of the oil separator means 27 having an input and an output for the compressible fluid connected respectively to the delivery 9 and to the input of the condenser 21 and an output for the lubricating oil connected to the intake 5 of the compressor body 3; the circuit 2 can further comprise at least one of flow control valves, by-pass, gaseous and liquid phases separators of the working fluid, high pressure valves and flash-gas valves.
  • the present invention has shown great efficiency and functionality in systems provided with one or more completely hermetic compressors in which it is not possible to use sensors and/or to see inside and which are often without level, pressure or other lubricating oil parameter sensors. Furthermore, it is to be noted that the present invention allows the use of the working fluid pressure standard sensors of the circuit in the collector or delivery lumen of the compressor to estimate the lubricating oil level without any detection of the parameters and state of the lubricating oil itself.

Claims (8)

  1. Überwachungssystem eines Schmiermittels eines Verdichters (3) eines Kältemittelkreislaufs (2) für ein verdichtbares Fluid, bei dem der Verdichter mit einer Aufnahme (5) und einer Zuführung (9) ausgestattet ist; wobei das Überwachungssystem (1) einen An-Aus-Zustandsdetektor (11) des Verdichters (3), einen Drucksensor (13) an der Verdichterzuführung (9) und ein Überwachungsgerät (15) umfasst, welches mit dem An-Aus-Zustandsdetektor (11) und mit dem Drucksensor (13) verbunden ist, um das Überwachungsgerät (15) entsprechend mit Daten über den Betrieb oder den Aus-Zustand des Verdichters (3) und einem Datenstrom über die Zeit über den Druck des verdichtbaren Fluids an der Verdichterzuführung (9) zu versorgen, dadurch gekennzeichnet, dass im Anschluss an die Erfassung des Verdichter-Status, der von An zu Aus schaltet durch das Überwachungsgerät (15), das Überwachungsgerät (15) so konfiguriert ist, dass es den Verlauf des Datenstroms der Druckwerte des verdichtbaren Fluids über die Zeit an der Zuführung (9) vergleicht, beginnend beim Schaltmoment im abgeschalteten Zustand, mit einem vorbestimmten Verlauf, der darin gespeichert ist, wobei im Falle einer Diskrepanz zwischen den beiden Verläufen, die einen vorbestimmten Grenzwert überschreiten, das Überwachungsgerät (15) so konfiguriert ist, dass es mindestens ein Alarmsignal ausgibt, bei dem das Überwachungsgerät (15) konfiguriert ist, die Druckverläufe zu vergleichen durch Vergleichen der Zeit, die der Druck des verdichtbaren Fluids bei der Zuführung (9) benötigt, um sich zu stabilisieren oder einen vorbestimmten Wert mit den entsprechenden Zeiten zu erreichen, die den vorbestimmten, gespeicherten Verlauf darstellen; oder das Überwachungsgerät (15) ist konfiguriert, um die Druckverläufe zu vergleichen, durch Vergleichen der Werte der ersten und/oder zweiten Ableitung zu bestimmten Zeitintervallen oder ihrer Durchschnittswerte in einem oder mehr Zeitintervallen oder Integralen des Druckverlaufs vom Moment des Abschaltens bis sich der Druck des verdichtbaren Fluids bei der Zuführung (9) stabilisiert oder einen vorbestimmten Wert erreicht, der vorbestimmten Werten der ersten und/oder zweiten Ableitung, den Durchschnittswerten oder der Integralen des Druckverlaufs entspricht.
  2. System nach Anspruch 1, dadurch gekennzeichnet, dass in dem Überwachungsgerät (15) ein oder mehr vorbestimmte Bezugsverläufe des Zufuhrdrucks gespeichert werden, entsprechend des Schmiermitteltyps und/oder der Betriebsbedingungen oder in dem Überwachungsgerät (15) sind ein oder mehr Realdruckverläufe bei der Zuführung gespeichert, die nach dem Abschalten des Verdichters in realen Betriebsbedingungen festgestellt wurden.
  3. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Überwachungsgerät (15), nach dem Abschalten des Verdichters, die Verriegelung jeder Verbindung und Umführungsleitung zwischen der Aufnahme (5) und der Zuführung (9) des Verdichters (3) steuert und dadurch, dass es ein Rückschlagventil (17) umfasst, das sich stromabwärts der Zuführung (9) befindet, um zu vermeiden, dass der kühlende Fluidstrom in Richtung der Zuführung selbst strömt.
  4. System nach Anspruch 3, dadurch gekennzeichnet, dass das Überwachungsgerät (15) eine durch Mikroprozessoren programmierbare digitale Eingabe ist und Eingangsanschlüsse für mindestens die Signale hat, die durch den Zustandsdetektor (11) und den Drucksensor (13) bereitgestellt werden und mindestens einen Ausgangsanschluss für das Alarmsignal, um akustische und/oder optische Alarme zu aktivieren.
  5. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Überwachungsgerät (15) mit einem digitalen Ausgang versehen ist, der mit Übertragungsmitteln verbunden ist, und in diesem Fall bei einer Diskrepanz zwischen zwei Verläufen, die einen vorbestimmten Grenzwert überschreitet, ein Alarmsignal in digitaler Form über die Übertragungsmittel an mindestens eine Betriebsstation sendet.
  6. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Überwachungsgerät (15) mit einem Steuerausgang versehen ist, der direkt oder indirekt mit Mitteln zur Unterbrechung der elektrischen Stromzufuhr (18) des Verdichters verbunden ist, um letzteren in Übereinstimmung mit der Alarmsignalerzeugung abzuschalten.
  7. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Überwachungsgerät (15) mit einem Steuerausgang versehen ist, der direkt oder indirekt mit Reserveverdichtem des Kreislaufs verbunden ist, um letztere entsprechend der Erzeugung des Alarmsignals zu aktivieren.
  8. System nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kreislauf (2) und das verdichtbare Fluid in kühlender Art vorliegen und dass der Kreislauf zusätzlich zu dem Verdichter (3) und beginnend bei seiner Zuführung (9) mindestens einen Kondensator (21), ein kapillares oder schichtendes Ventil (23) und einen Verdampfer (25) umfasst, wobei der Kreislauf (2) ebenso mindestens ein Öltrennmittel (27) umfassen kann, welches einen Einlass und einen Auslass für das verdichtbare Fluid hat und entsprechend mit der Zuführung (9) und dem Verdampfereinlass (21) verbunden ist und mit einem Ölauslass, der mit der Aufnahme (5) des Verdichters (3) verbunden ist; wobei der Kreislauf (2) des Weiteren mindestens eines ausgewählt aus Strömungskontrollventil, Umführungsleitung, gasförmig-flüssig-Fluid-Phasentrenner, Hochdruckventile, Blitzgas-Ventile umfassen kann.
EP18205135.9A 2017-11-09 2018-11-08 Schmiermittelüberwachungssystem für einen kreislaufverdichter Active EP3483529B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SI201830147T SI3483529T1 (sl) 2017-11-09 2018-11-08 Nadzorni sistem za mazanje obtočnega kompresorja
PL18205135T PL3483529T3 (pl) 2017-11-09 2018-11-08 System monitorowania środka smarującego w sprężarce obwodu
HRP20201925TT HRP20201925T1 (hr) 2017-11-09 2020-12-03 Sustav za nadzor maziva za kružni kompresor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT201700128009 2017-11-09

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EP3483529A1 EP3483529A1 (de) 2019-05-15
EP3483529B1 true EP3483529B1 (de) 2020-09-30

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EP18205135.9A Active EP3483529B1 (de) 2017-11-09 2018-11-08 Schmiermittelüberwachungssystem für einen kreislaufverdichter

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CN111141074B (zh) * 2020-01-06 2022-06-24 宁波奥克斯电气股份有限公司 一种空调的控制方法、装置、空调器及存储介质
CN111141075B (zh) * 2020-01-06 2022-01-25 宁波奥克斯电气股份有限公司 一种空调的控制方法、装置、空调器及存储介质

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US5209076A (en) 1992-06-05 1993-05-11 Izon, Inc. Control system for preventing compressor damage in a refrigeration system
US5634345A (en) 1995-06-06 1997-06-03 Alsenz; Richard H. Oil monitoring system
EP2690379A1 (de) 2012-07-26 2014-01-29 Electrolux Home Products Corporation N.V. Anwendung mit Wärmepumpe

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ES2834887T3 (es) 2021-06-21
HRP20201925T1 (hr) 2021-02-05
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PL3483529T3 (pl) 2021-03-08
EP3483529A1 (de) 2019-05-15
PT3483529T (pt) 2020-11-13

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