EP3405673A1 - Procédé de détection d'une soupape bloquée d'un compresseur de réfrigerant et système de commande pour un compresseur de réfrigerant - Google Patents

Procédé de détection d'une soupape bloquée d'un compresseur de réfrigerant et système de commande pour un compresseur de réfrigerant

Info

Publication number
EP3405673A1
EP3405673A1 EP17700379.5A EP17700379A EP3405673A1 EP 3405673 A1 EP3405673 A1 EP 3405673A1 EP 17700379 A EP17700379 A EP 17700379A EP 3405673 A1 EP3405673 A1 EP 3405673A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
max
refrigerant compressor
blocked valve
detection
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.)
Granted
Application number
EP17700379.5A
Other languages
German (de)
English (en)
Other versions
EP3405673B1 (fr
Inventor
Ralf Karp
Hans WIGH
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.)
Secop GmbH
Original Assignee
Nidec Global Appliance Germany GmbH
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
Application filed by Nidec Global Appliance Germany GmbH filed Critical Nidec Global Appliance Germany GmbH
Publication of EP3405673A1 publication Critical patent/EP3405673A1/fr
Application granted granted Critical
Publication of EP3405673B1 publication Critical patent/EP3405673B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/025—Stopping, starting, unloading or idling control by means of floats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • 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
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/06—Valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0201—Current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0205—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0209—Rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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

Definitions

  • the present invention relates to a method for detecting a blocked valve of a refrigerant compressor having a drive unit and a piston-cylinder unit for cyclically compressing a refrigerant, wherein the
  • Drive unit has an electric motor for driving the piston-cylinder unit, wherein the speed of the
  • Electric motor is monitored.
  • the present invention relates to a
  • a refrigerant compressor comprising a drive unit and a piston-cylinder unit for cyclically compressing a
  • the drive unit comprises an electric motor for driving the piston-cylinder unit and wherein the control system comprises a control electronics.
  • a refrigerant compressor having a drive unit and a piston-cylinder unit for cyclically compressing a refrigerant, wherein the drive unit comprises an electric motor for driving the piston-cylinder unit and wherein the Speed of the electric motor is controlled, there is a possible error condition in a blocked valve.
  • This may in particular be a blocked suction or
  • Solenoid valve does not necessarily have to be part of the refrigerant compressor.
  • the blocked valve has in any case the consequence that
  • Refrigerant in the cooling circuit is no longer required for cooling or not at all
  • Application device e.g. a refrigerator determines that the temperature does not drop, and then usually regulates the refrigerant compressor to maximum cooling capacity, so that the electric motor runs at maximum speed - of course, without success, because the coolant in the cooling circuit can not be transported.
  • the back pressure of the refrigerant in the pressure line increases so much that the pressure valve does not open, because the pressure built up by the refrigerant compressor is no longer sufficient for this purpose.
  • Temperature of the compressor e.g. about a certain
  • Limit temperature to define as a termination condition. That the temperature is constantly monitored, and when the
  • Limit temperature is exceeded and the electric motor preferably runs at maximum speed, the electric motor is turned off.
  • the temperature sometimes does not rise far enough to determine a limit temperature meaningful.
  • this maximum speed may deviate from a theoretically technically possible maximum rotational speed of the electric motor, for example because of noise the application device does not utilize the theoretically technically possible maximum speed of, for example, 4000 min -1 and requesting, but as a "nominal maximum speed 'defines a lower speed of for example 3600 min -1.
  • a variety of external circumstances such as a too low supply voltage, cause the target maximum speed (and of course the theoretically technically possible maximum speed of the electric motor) is not reached, so that the maximum speed actually lower than the target maximum speed (and Of course, as the theoretically technically possible maximum speed of the
  • a typical monitoring parameter would be the current consumption of the electric motor, which after rising to a maximum, for example, 0.85 A, within a certain period of time to a certain value - for example, to 0.425 A - goes back, while the electric motor is constantly running at maximum speed.
  • a decisive criterion for the presence of a blocked valve can therefore be used that the decrease of the monitoring parameter within the certain period of time is "large enough", which size depends on the particular type of refrigerant compressor and by means of a
  • Drive unit has an electric motor for driving the piston-cylinder unit, wherein the speed of the
  • Electric motor is monitored, according to the invention provided that first a maximum speed of the electric motor is detected and that the following steps are carried out as long as the speed of the electric motor substantially the
  • the blocked valve may be a blocked suction or pressure valve.
  • the blockage condition may also be due to another defect
  • Element in the refrigeration cycle e.g. a solenoid valve will be triggered, which element is not necessarily part of the
  • the continued running of the electric motor with maximum speed is in the application by a coolant compressor driving application device, e.g. through a fridge,
  • Monitoring parameters decreases over time. It is provided in a preferred embodiment of the method according to the invention that ⁇ ⁇ > 0.2, preferably ⁇ ⁇ > 0.4, more preferably ⁇ ⁇ > 0.5 applies. This means that the percentage decrease in the value of the monitoring parameter must be at least 20%, preferably at least 40%, particularly preferably at least 50%.
  • the monitoring parameter which has the described temporal behavior in the blockade state can be the current consumed by the electric motor.
  • a motor winding temperature and a temperature of a control electronics of the electric motor or the refrigerant compressor have the same
  • the monitoring parameter is a current absorbed by the electric motor or a temperature of an electronic control unit of the
  • Refrigerant compressor in particular of the electric motor, or a motor winding of the electric motor.
  • these temperatures are always relative to the ambient temperature of the
  • Specify refrigerant compressor If, for example, the ambient temperature is 20 ° C (room temperature) and the maximum value of the temperature is 90 ° C, 70 ° C must be used for X max .
  • the determination of the maximum value X max occurs only after an initiation period after detection of the maximum speed of the electric motor. In other words, the detection of the maximum speed defines one
  • Initiation period waited before the determination of the maximum value X max of the monitoring parameter is performed.
  • the optimal initiation period may be in the trial for
  • Initiation period is typically a few minutes. Therefore, in a preferred embodiment of the invention
  • Initiation period is at least 5 minutes, preferably at least 10 minutes, more preferably at least 15 minutes.
  • Blockade indicated it can be assumed with very high certainty that actually the blockage condition or a blocked valve is present. Therefore, it is provided in a preferred embodiment of the method according to the invention that after a verification period after the detection of the blocked valve, a value X t2 of the Monitoring parameter is determined and the detection of the blocked valve is verified when X t2 is less than X max and (X max - Xt2) / Xmax - ⁇ ⁇ applies.
  • Verification period should take into account any fluctuations of the monitoring parameter, i. if the value of the monitoring parameter also after the
  • Verification period is correspondingly low, it can be assumed with high probability that this reduction is not due to a random fluctuation
  • the optimal verification period can be determined in the trial for different refrigerant compressor types and then set accordingly, the
  • Verification period typically a few at most
  • Embodiment of the method according to the invention provided that the verification period is 15 s to 5 min, preferably 30 s to 3 min, more preferably 45 s to 1 min 30 s.
  • the first time span can also be of the type of
  • the first Time is at least 3 h, preferably at least 5 h, more preferably at least 6 h.
  • Blocked valve is written a corresponding error message in a designated, readable memory. Analogously, it is provided in a preferred embodiment of the method according to the invention that after the
  • Verification of the detection of the blocked valve a corresponding error message is written in a designated, readable memory.
  • the particular write to the read-only memory allows this information to be shared with different control systems - e.g. a control system of the application device - to provide for further processing.
  • a non-volatile memory such as e.g. a so-called FLASH, EPROM or NVRAM memory is the information to
  • Blocked state or the blocked valve can be used to turn off the compressor, since it is clear that in this state, the desired cooling can not be achieved.
  • an operating method for operating a refrigerant compressor is provided according to the invention, the operating method comprising the
  • the electric motor in the stopped state does not absorb electricity, so no unnecessary
  • Refrigerant compressor is no longer present. For example, it could be that a solenoid valve had triggered the blocking situation because it had not opened, thus blocking the cooling circuit, and that this
  • Solenoid valve when restarting now but opens as planned Therefore, it is provided in a preferred embodiment of the operating method according to the invention that the electric motor is restarted after a second period of time. Waiting for the second period of time can serve to bring about a certain relaxation of the pressure conditions, which can contribute to the release of a blocked valve.
  • a temperature of the compressor may also relax during the second time period, which may also contribute to releasing a blocked valve.
  • the second period of time can be kept relatively short, especially in the second range. Therefore, in a preferred embodiment of the invention
  • the second period is at least 3 s, preferably at least 6 s, more preferably at least 15 s. In general, however, it should be noted that the values for the second period may vary widely depending on the application.
  • the second time period is a maximum of 60 minutes. That is, it is assumed that the blocking valve must solve within this maximum duration of the second period, otherwise of one
  • inventive method and / or for carrying out an operating method according to the invention is set up.
  • Drive unit has an electric motor for driving the piston-cylinder unit, according to the invention provided that the refrigerant compressor, an inventive
  • Control system includes. It should be noted that in all of the above embodiments, the refrigerant compressor is in particular a
  • Refrigerant compressor with a hermetically sealed housing can act, with the drive unit and the pistons
  • Cylinder unit are arranged in the housing.
  • Fig. 1 is a schematic axonometric view of a
  • Fig. 2 is a diagrammatic illustration of the
  • Fig. 1 shows a refrigerant compressor 1 according to the invention, wherein a hermetically sealed housing 2 of the
  • Refrigerant compressor 1 is only partially shown or an upper half of the housing 2 is removed to allow a view into the housing 2.
  • a cylinder housing 3 of a piston-cylinder unit can be seen inside the housing 2, a cylinder housing 3 of a piston-cylinder unit can be seen.
  • the cylinder housing 3 is mounted on a drive unit 4, which comprises an electric motor for driving the piston-cylinder unit.
  • the electric motor via a crankshaft 10 and a connecting rod drives a piston of the piston-cylinder unit in a cylinder, which cylinder is arranged in the cylinder housing 3. This will be a
  • Cylinder axis realized to compress refrigerant.
  • the refrigerant is sucked via a suction muffler 9 and arranged in a valve plate 6 suction valve into the cylinder, compressed and via a arranged in the valve plate 6 pressure valve in an outwardly leading
  • Pressure tube 8 passed.
  • the refrigerant is subsequently conveyed in a refrigerant circuit of an application device, such as e.g. a refrigerator, in which refrigerant circuit of the refrigerant compressor 1 is incorporated, to a condenser (not shown) passed.
  • an application device such as e.g. a refrigerator, in which refrigerant circuit of the refrigerant compressor 1 is incorporated, to a condenser (not shown) passed.
  • the valve plate 6 is on the cylinder in the region of
  • Cylinder head mounted in Fig. 1 a cylinder cover 5 can be seen, which is screwed by means of screws 7 with the cylinder.
  • the valve plate 6 is arranged between the cylinder cover 5 and the cylinder.
  • the refrigerant compressor 1 is operated at variable speed CO, i. the speed CO of the electric motor is dependent on the cooling capacity requested by the application device. At maximum cooling capacity of the runs
  • Electric motor with a maximum speed COmax which is typically 3000 min -1 to 4000 min -1 .
  • the blockage state can be caused by a blocked valve of the refrigerant compressor 1 or leads to a blocked valve of the refrigerant compressor 1, since the valve, in particular the pressure valve, no longer due to the building up pressure conditions
  • Refrigerant compressor 1 are monitored to determine their timing. As monitoring parameters come
  • Refrigerant compressor 1 and the electric motor or a motor winding of the electric motor in question are always relative to the ambient temperature
  • FIG. 2 illustrates these method steps on the basis of FIG
  • tO Wait for initiation time tO, so that a certain balance of pressure conditions can be set before X ma x is determined.
  • tO is at least 5 minutes, preferably at least 10 minutes, more preferably at least 15 minutes.
  • Xti 50 ° C (corresponds to measured 70 ° C at 20 ° C
  • ⁇ ⁇ typically ⁇ ⁇ > 0.2, preferably ⁇ ⁇ > 0.4, more preferably ⁇ ⁇ > 0.5 applies.
  • the value suitable for the respective type may preferably be in one
  • Verification period t2 is waited to then again a current value X t2 of the monitoring parameter
  • the verification period t2 is 15 seconds to 5 minutes, preferably 30 seconds to 3 minutes, more preferably 45 seconds to 1 minute 30 seconds.
  • the verification period t2 is 15 seconds to 5 minutes, preferably 30 seconds to 3 minutes, more preferably 45 seconds to 1 minute 30 seconds.
  • Refrigerant compressor 1 a control system with a
  • Control electronics on which control electronics is set up to carry out said method are set up to carry out said method.
  • this control electronics also forms the above-mentioned control electronics of the electric motor.
  • control electronics is further for carrying out an inventive
  • control electronics may be configured to restart the electric motor after a relatively short second time period t3.
  • the second time period t3 is only a few seconds, for example at least 3 s,
  • the second period t3 is typically limited to a maximum of up to 60 minutes.
  • control system may have a memory in which after the detection or
  • T temperature of a control electronics of the electric motor or of a motor winding of the electric motor t time tO initiation time interval tl first time span t2 verification time period t3 second time span

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé de détection d'une soupape bloquée d'un compresseur de réfrigérant (1) comprenant une unité d'entraînement (4) et une unité piston-cylindre pour la compression cyclique d'un réfrigérant, l'unité d'entraînement (4) comprenant un moteur électrique pour l'entraînement de l'unité piston-cylindre, le régime (ω) du moteur électrique étant surveillé. Selon l'invention, tout d'abord un régime maximal (ωmax) du moteur électrique est détecté et les étapes suivantes sont effectuées tant que le régime (ω) du moteur électrique correspond sensiblement au régime maximal (ωmax) : détermination d'une valeur maximale Xmax d'un paramètre de surveillance (I, T) du compresseur de réfrigérant (1) ; détermination d'une valeur Xt1 du paramètre de surveillance (I, T) après un premier laps de temps (t1) après la détermination de la valeur maximale Xmax ; détection d'une soupape bloquée lorsque Xt1 est inférieure à Xmax et que l'on a (Xmax - Xt1) / Xmax ≥ Δx, Δx étant prédéfini.
EP17700379.5A 2016-01-18 2017-01-16 Procédé de détection d'une soupape bloquée d'un compresseur de réfrigerant et système de commande pour un compresseur de réfrigerant Active EP3405673B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT500082016 2016-01-18
PCT/EP2017/050756 WO2017125334A1 (fr) 2016-01-18 2017-01-16 Procédé de détection d'une soupape bloquée d'un compresseur de réfrigerant et système de commande pour un compresseur de réfrigerant

Publications (2)

Publication Number Publication Date
EP3405673A1 true EP3405673A1 (fr) 2018-11-28
EP3405673B1 EP3405673B1 (fr) 2019-08-28

Family

ID=59362018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17700379.5A Active EP3405673B1 (fr) 2016-01-18 2017-01-16 Procédé de détection d'une soupape bloquée d'un compresseur de réfrigerant et système de commande pour un compresseur de réfrigerant

Country Status (5)

Country Link
US (1) US20190010939A1 (fr)
EP (1) EP3405673B1 (fr)
CN (1) CN108700051B (fr)
AT (1) AT518199B1 (fr)
WO (1) WO2017125334A1 (fr)

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AT518199B1 (de) * 2016-01-18 2017-11-15 Secop Gmbh Verfahren zur Detektion eines blockierten Ventils eines Kältemittelkompressors und ein Steuerungssystem für einen Kältemittelkompressor
CN109631228B (zh) * 2019-01-31 2020-07-28 四川长虹空调有限公司 制冷系统制冷剂快速泄漏的判定方法及系统
DE102020100296A1 (de) * 2020-01-09 2021-07-15 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Kompressorsystem und Verfahren zum Betreiben eines Kompressorsystems in Abhängigkeit des Druckluftbedarfs eines Betriebszustands des Fahrzeugs
CN112556090B (zh) * 2020-12-11 2022-07-08 四川长虹空调有限公司 空调系统堵塞的检测方法

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Also Published As

Publication number Publication date
CN108700051A (zh) 2018-10-23
AT518199A1 (de) 2017-08-15
US20190010939A1 (en) 2019-01-10
AT518199B1 (de) 2017-11-15
CN108700051B (zh) 2019-12-31
WO2017125334A1 (fr) 2017-07-27
EP3405673B1 (fr) 2019-08-28

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