CN108700051A - Detect the method for compressor for cooling fluid valve blocking and the control system of compressor for cooling fluid - Google Patents

Detect the method for compressor for cooling fluid valve blocking and the control system of compressor for cooling fluid Download PDF

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Publication number
CN108700051A
CN108700051A CN201780007006.3A CN201780007006A CN108700051A CN 108700051 A CN108700051 A CN 108700051A CN 201780007006 A CN201780007006 A CN 201780007006A CN 108700051 A CN108700051 A CN 108700051A
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CN
China
Prior art keywords
compressor
max
cooling fluid
motor
cylinder
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Granted
Application number
CN201780007006.3A
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Chinese (zh)
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CN108700051B (en
Inventor
R·卡尔普
H·威格
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Danfoss Deutschland GmbH
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De Tech Global Equipment Germany Ltd
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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

Abstract

The present invention relates to a kind of methods for detecting the valve blocking of compressor for cooling fluid (1), compressor for cooling fluid (1) has driving unit (4) and piston-cylinder-unit for recycling compression coolant, wherein, driving unit (4) has the motor for driving piston-cylinder-unit, wherein, the rotating speed (ω) of motor is monitored.It is arranged according to the present invention at, first detect motor maximum speed (ωmax), and if the rotating speed (ω) of motor substantially corresponds to the maximum speed (ωmax), execute following steps:Determine the maximum value X of the monitoring parameter (I, T) of compressor for cooling fluid (1)max;In determining maximum XmaxThe value X of monitoring parameter (I, T) is determined after first time period (t1) latert1;Work as Xt1Less than XmaxAnd meet (Xmax-Xt1)/Xmax≥ΔXWhen, detect valve blocking, wherein Δ X is scheduled.

Description

Detect the method for compressor for cooling fluid valve blocking and the control system of compressor for cooling fluid
Technical field
The present invention relates to a kind of method for detecting valve blocking/obstruction of compressor for cooling fluid, the compressor for cooling fluid Piston-cylinder-unit with driving unit and for recycling compression coolant, wherein driving unit has for driving piston- The motor of cylinder-unit, wherein monitor the rotating speed of motor.
In addition, the present invention relates to a kind of control system for coolant compression, compressor for cooling fluid includes driving unit With piston-cylinder-unit for recycling compression coolant, wherein driving unit has the electricity for driving piston-cylinder-unit Machine, and wherein, control system has control electronic device.
Background technology
In the compressor for cooling fluid of piston-cylinder-unit with driving unit and for recycling compression coolant, driving Unit has the motor for driving piston-cylinder-unit, and wherein, controls the rotating speed of motor, and existing in the valve of locking can The malfunction of energy.Here, it can be sucking or the locking of pressure valve that the malfunction, which is especially,.But in practice, such as May be the electromagnetism defective valve in cooling circuit, which is not necessarily a part for compressor for cooling fluid.
In any situation, the valve of locking all causes, in cooling circuit no longer with the required degree of cooling or completely Conveying coolant is not continued to, and thus can no longer be cooled down.Application apparatus, such as refrigerator for controling compressor for cooling fluid In order to make temperature not decline, and usually compressor for cooling fluid is adjusted to maximum cooling power later, to which motor is with maximum Rotating speed operation-certain and unsuccessful, because conveying coolant may do not continued in cooling circuit.
Even when cooling circuit reason for impeding is not originally the valve blocking of compressor for cooling fluid, finally still lead now Cause the locking of the pressure valve of valve, particularly compressor for cooling fluid.Why in this way, being because since compressor is in highest power It is continued to run in grade, the back pressure of cooling medium continues growing in pressure range so that pressure valve is no longer opened, because by cooling down The pressure that agent compressor is established is no longer abundant.In general, when back pressure is sufficiently high (with how to reach or generate the back pressure independently), Always the locking of pressure valve is at least resulted in.
Compressor for cooling fluid is enduringly continued to run in maximum speed due to malfunction in order to prevent, from the prior art In it is known that for example by the temperature rise of compressor to for example higher than certain limiting temperature, being defined as interrupt condition.Also It is to say, constantly monitors temperature, and when oversteps the extreme limit temperature and motor is preferably run with maximum speed herein, cut-out electricity Machine.
In the known process disadvantageously, it is not that all compressor for cooling fluid are all worked normally.That is, real Show to be unable to fully rise to sometimes according to the design scheme or type of compressor for cooling fluid, temperature that pole can be reasonably determined Limit temperature.
Invention content
Therefore it is an object of the invention to provide a kind of method, the blocking state, definite for reliably detecting compressor is realized Say the locking of valve in ground.Correspondingly, it is a further object of this invention to, a kind of control system for compressor for cooling fluid is provided, The locking for realizing the blocking state, exactly valve that reliably detect compressor, so as to take counter-measure.
Using it is different types of, be respectively provided with driving unit and for recycle compression coolant piston-cylinder-unit it is cold But (wherein, driving unit has the motor for driving piston-cylinder-unit to agent compressor, and wherein, monitors turning for motor Speed) the complex series experiment that carries out it has been shown that occur in blocking state, exactly in valve blocking, be substantially reduced Or even completely stopping quality stream can cause, although certain monitoring parameters increase in its value and reach maximum value first, But later it is certain, preferably reduce again in predetermined time period, and motor continuation is run with maximum speed.
Herein and hereinafter, " maximum speed " is understood as compressor for cooling fluid or motor in current cooling circuit always In the maximum (top) speed that actually reaches.For various reasons, maximum speed can be with possible maximum in the theory and technology of motor Rotating speed is different, such as because for noise reason, application apparatus does not utilize or require such as 4000min-1Theory and technology on can The maximum (top) speed of energy, but the lower rotating speed of predetermined such as 3600min-1 is used as " theoretical maximum speed ".In addition, different External circumstances, for example too low service voltage can cause, and it is (possible in certainly same theory and technology that theoretical maximum speed is not achieved The maximum (top) speed of motor), to maximum speed actually be lower than theoretical maximum speed (certainly equally can also below in theory and technology The maximum (top) speed of the motor of energy).
Typical monitoring parameter is the current drain of motor, after the maximum value for rising to such as 0.85A, current drain Certain value (such as 0.425A) is fallen back within certain period of time, and motor is run on maximum speed always.
Therefore, as there is the major criterion of valve blocking, using following situation, that is, monitoring parameter is in the regular hour " sufficiently enough " decline within section, wherein the parameter is related to the respective type of compressor for cooling fluid and can be by means of reality Room experiment is tested to determine and can correspondingly predefine.
Correspondingly, in the cooling of piston-cylinder-unit for detecting with driving unit and for recycling compression coolant In the method for the valve blocking of agent compressor, wherein driving unit has the motor for driving piston-cylinder-unit, wherein prison Control motor rotating speed, it is arranged according to the present invention at, first detect motor maximum speed, if the rotating speed of motor is substantially corresponding In maximum speed, following steps are executed:
Determine the maximum value X of the monitoring parameter of compressor for cooling fluidmax;
In determining maximum XmaxThe value X of monitoring parameter is determined after first time period latert1;
Work as Xt1Less than XmaxAnd meet (Xmax-Xt1)/Xmax≥ΔXWhen, detect valve blocking, wherein ΔXIt is predetermined 's.
Here, valve blocking especially can be sucking or pressure valve blocking.But in practice, it is also possible to by cooling The element of other failures, such as solenoid valve trigger blocking state in circuit, need not be a part for compressor for cooling fluid. It is common the result is that the valve blocking of compressor for cooling fluid, especially in blocking state but such as above illustrated It is the pressure valve blocking of compressor for cooling fluid, wherein the valve of locking mostly, preferably completely blocks the quality of coolant Stream.
In applicable cases, by controling the application apparatus of compressor for cooling fluid, for example causing motor with most by refrigerator High rotating speed continues to run with, because application apparatus discovery does not occur desired cooling and thus continues requirement maximum one. Typical value for maximum speed is 3000min-1To 4000min-1.It should be noted herein that being obviously related to that there is variable turn The compressor for cooling fluid of speed, otherwise only setting is unique in the operation of compressor for cooling fluid while also illustrating that maximum speed Rotating speed.
In practice, inevitable certain minimum fluctuation of speed.Therefore, reasonably, from typically maximum ± 2% The maximum speed value margin of tolerance is set out.If so changing rotating speed so that it is very different with maximum speed, especially compare highest Tachometer value is small by 2% or more, method of shutting down.In the case of rotating speed increase, actual maximum speed value has not yet been reached, wherein logical Often when reaching practical maximum speed value, restart method.It is typical to rise because no longer going out in the case of rotating speed declines Situation, exactly valve blocking are now blocked, this makes it possible to obtain desired cooling and the smaller cooling capacities of application apparatus requirement. Interrupt method and just restart method when reaching maximum speed again as a result,.
As having determined, the respective type phase of degree and compressor for cooling fluid that monitoring parameter reduced with the time It closes.Here, being arranged in preferred form of implementation according to the method for the present invention, ΔX>=0.2, preferably ΔX>=0.4, it is special Not preferably ΔX≥0.5.That is, the decline percentage of the value of monitoring parameter is necessary at least 20%, preferably at least 40%, particularly preferably at least 50%.
As having determined, as the monitoring parameter with illustrated time performance in blocking state, it can make With the electric current by electrical consumption.Similarly, the control electronic device of motor winding temperature and motor or compressor for cooling fluid Temperature also temperature characterisitic having the same, therefore the temperature is also ideally suited as monitoring parameter.Therefore, according to the present invention Method preferred form of implementation in, be arranged to, monitoring parameter is the electric current of electrical consumption, or is compressor for cooling fluid Control the temperature of the machine winding of electronic device, particularly motor or motor.Obviously, always relative to the ring of compressor for cooling fluid Border temperature provides the temperature.If environment temperature is, for example, 20 DEG C (indoor temperatures) and the maximum value as temperature measures 90 DEG C, then XmaxIt is 70 DEG C.
As obtained in complicated experiment, it is recommended that not being directly to turn in the highest for detecting motor Determining maximum X after speedmax, but certain scheduled time is waited for thus.It is flat that this allows to adjust certain pressure dependence Weighing apparatus, for the balance, monitoring parameter can have its maximum value Xmax first.Otherwise existing risk is that the value of monitoring parameter is also It continues growing, until reaching pressure dependence balance.Therefore, it is arranged in preferred form of implementation according to the method for the present invention At the just determining maximum X after the initial time section after detecting the maximum speed of motormax.In other words, it detects most The definition of high rotating speed is at the beginning of method or start time.In the preferred form of implementation, directly in the time started Or after start time, in the maximum value X for determining monitoring parametermaxBefore, initial time section is waited for.
Optimal initial time section can be obtained in the experiment for different compressor for cooling fluid types, and corresponding later Ground is made a reservation for, wherein initial time section is typically a few minutes.Therefore, in preferred implementation according to the method for the present invention It is arranged in form, initial time section is at least 5 minutes, preferably at least 10 minutes, particularly preferably at least 15 minutes.
In order to ensure actually to meet the condition for for blocking state, being exactly used for valve blocking as far as possible, can lead to It crosses after upper primary determining monitoring parameter and quickly to determine monitoring parameter again and by itself and maximum value XmaxIt compares, carries out school It tests.Blocking state has been also indicated that if compared, can have been thought with extreme high reliability, and blocking state, definitely is there are in fact Say valve blocking.Therefore, it is arranged in preferred form of implementation according to the method for the present invention, after detecting valve blocking After checking time section, the value X of monitoring parameter is determinedt2, and work as Xt2Less than XmaxWhen and (Xmax-Xt2)/Xmax≥ΔXWhen, card Detect valve blocking in fact.Here, the waiting of checking time section is considered as possible monitoring parameter fluctuation, that is to say, that work as monitoring The value of parameter when also corresponding low after checking time section, can high possibility think that the reduction is not due to accidental wave It is dynamic to cause.
Obviously, it is also contemplated that particularly preferred implementation modification in order to verify, checks condition (X whereinmax-Xt2)/ Xmax≥ΔX', wherein ΔX‘≠ΔX, preferably ΔX' > ΔsX.That is, in order to verify, the prison of compressor for cooling fluid is checked Control whether parameter develops as model calculates and/or laboratory test prediction in time, wherein time development is typical Ground is to continue to reduce.
It can be obtained in the experiment for different compressor for cooling fluid types and correspondingly determine optimal checking time Section, wherein checking time section is typically highest a few minutes.Therefore, in preferred form of implementation according to the method for the present invention In be arranged to, checking time section be 30 seconds 15 seconds to 5 minutes, preferably 30 seconds to 3 minutes, particularly preferably 45 seconds to 1 point.
First time period equally can be related to the type of compressor for cooling fluid, and can be (in particular according to the examination carried out Test) correspondingly make a reservation for.Therefore, in preferred form of implementation according to the method for the present invention, it is arranged to, first time period is extremely It is 3 hours, preferably at least 5 hours, particularly preferably at least 6 hours few.
Be arranged in preferred form of implementation according to the method for the present invention, after detecting valve blocking, for its Corresponding fault message is write/records in the reservoir that can be read of setting.Similarly, excellent according to the method for the present invention It is arranged in the form of implementation of choosing, after confirming to detect valve blocking, is write in the reservoir that can be read for its setting Corresponding fault message.The reservoir that correspondingly write-in can be read realizes that these information are provided to different control system (examples Such as the control system of application apparatus) to continue with.In addition, it is immutable reservoir especially to work as reservoir, for example, it is so-called FLASH-, EPROM- or NVRAM reservoir when, also the information can be read for diagnostic purpose in later time.
In practice, blocking state, exactly the detection or verification of valve blocking can be used for cutting off compressor because obviously It can not achieve desired cooling in this state.Therefore, motor continuation continues to run on maximum speed means compressor Unnecessary load and unnecessary energy expenditure.Correspondingly, according to the present invention, setting is a kind of for running coolant compression The operation method of machine, the operation method include according to the method for the present invention, wherein stop motor after detecting valve blocking. Similarly, according to the present invention, a kind of operation method for running compressor for cooling fluid of setting, which includes according to this The method of invention, wherein stop motor after confirmation detects valve blocking.Preferably, motor does not disappear in the state of stopping Power consumption stream, from without unnecessary energy expenditure.
Experiments have shown that after restarting compressor for cooling fluid, usually no longer there is the reason of blocking situation.Such as it can Can, because solenoid valve is not turned on and thus blocks cooling circuit, solenoid valve to have activated blocking state, and And the solenoid valve opens as specified in restarting.Therefore, in the preferred of operation method according to the present invention It is arranged in form of implementation, restarts motor after the second period of time.Here, second time period is waited for can be used for causing one Determine pressure ratio/pressure condition release of degree, this can be that the valve release of locking contributes.In addition, during the second period Also the temperature of compressor can be mitigated or restore, this valve release for being similarly locking contributes.
Especially when the valve of locking has unstable performance and correspondingly in the operation several times of compressor for cooling fluid It is latched and in remaining operation and when non-latching, the second stand-by period can be relatively short, is especially held in the range of second.Cause This, is arranged in the preferred form of implementation of operation method according to the present invention, and second time period is at least 3 seconds, preferably At least 6 seconds, particularly preferably at least 15 seconds.However, it is often necessary to it is noted that according to applicable cases, it is used for second time period Value can be dramatically different.
It is reasonably that second time period can not be arbitrarily long in practice, because may also occur such failure shape certainly State, that is, the valve being latched wherein no longer loosens.Therefore, in the particularly preferred form of implementation of operation method according to the present invention In be arranged to, second time period is maximum 60 minutes.That is think, the valve of locking must be held in the maximum of second time period It is unclamped within the continuous time, otherwise obtains the malfunction that the valve of locking does not unclamp again.
Similarly with the above design scheme, in the control system for compressor for cooling fluid, compressor for cooling fluid includes Driving unit and for recycle compression coolant piston-cylinder-unit, wherein driving unit have for driving piston-cylinder- The motor of unit, and wherein, control system has control electronic device, arranged according to the present invention at control electronic device is set It is set to for implementing according to the method for the present invention and/or for implementing operation method according to the present invention.
In order to which finally the coolant for reliably determining blocking state, exactly valve blocking and being responded to it can be provided Compressor, in the compressor for cooling fluid of piston-cylinder-unit with driving unit and for recycling compression coolant, wherein Driving unit has the motor for driving piston-cylinder-unit, arranged according to the present invention at compressor for cooling fluid includes basis The control system of the present invention.
It should be noted that in all the embodiment above, compressor for cooling fluid is especially for thermosealed case Compressor for cooling fluid, wherein driving unit and piston-cylinder-unit are arranged in case.
Description of the drawings
The present invention is explained in detail now according to embodiment.Although attached drawing is exemplary and illustrates the idea of the present invention, But the idea of the present invention is not limited or embodied in an absolute way anyway.
Wherein:
Fig. 1 shows the schematical axis surveys view of compressor for cooling fluid according to the present invention, wherein having removed top Case half portion,
Fig. 2 shows chart explanations according to the method for the present invention.
Specific implementation mode
Fig. 1 shows compressor for cooling fluid 1 according to the present invention, wherein only partially shows compressor for cooling fluid 1 The case 2 airtightly sealed exactly removed the first half of case 2, to see in case 2.In the inside of case 2 In can be seen that the cylinder case 3 of piston-cylinder-unit.Cylinder case 3 is mounted at driving unit 4, and driving unit 4 includes for driving The motor of piston-cylinder-unit.Here, motor drives the work in the cylinder in being arranged in cylinder case 3 by bent axle 10 and connecting rod The piston of plug-cylinder-unit.Hereby it is achieved that piston in cylinder along the shuttling movement of cylinder axis, to compress coolant.
Here, coolant is inhaled by suction silencer 9 and the inlet valve being arranged in valve plate 6 in cylinder, compressed, and And the pressure valve by being arranged in valve plate 6 is directed in the pressure pipe 8 guided outward.Coolant is then in application apparatus, example As refrigerator coolant circuit in be directed to condenser (not shown), compressor for cooling fluid 1 is integrated into the coolant circuit In.
Valve plate 6 is assemblied at cylinder in the region of cylinder head, wherein can be seen that cylinder cap 5 in Fig. 1, cylinder cap 5 is by means of bolt 7 are bolted with cylinder.Here, valve plate 6 is arranged between cylinder cap 5 and cylinder.
Compressor for cooling fluid 1 is run with variable rotational speed omega, that is to say, that the rotational speed omega of motor is required with by application apparatus Cooling power it is related.In maximum cooling power, motor is with maximum speed ωmaxOperation, typically in 3000min-1Extremely 4000min-1Between.
In blocking state, the quality stream of coolant acutely reduces or stops completely in cooling circuit.Blocking state The valve blocking that can cause or cause compressor for cooling fluid 1 due to the valve blocking of compressor for cooling fluid 1, because of valve, particularly pressure Power valve can be opened due to no longer normally establishing pressure ratio.The latter is it is meant that the insufficient pressure established by piston-cylinder-unit It is enough in the back pressure for overcoming and being established due to blocking state.
In order to reliably determine blocking state, exactly valve blocking, it is arranged according to the present invention at, in addition to rotational speed omega, The monitoring parameter for also constantly monitoring compressor for cooling fluid 1, to obtain its time graph.As monitoring parameter, especially consider The machine winding of control electronic device, exactly motor or the motor of the electric current I and compressor for cooling fluid 1 that motor is born Temperature T.Obviously, it is provided always relative to the environment temperature of compressor for cooling fluid (typically indoor temperature, exactly 20 DEG C) The temperature.
According to the present invention, maximum speed ω is being detectedmaxLater, if the rotational speed omega of motor substantially corresponds to highest Rotational speed omegamax, execute following steps:
Determine the maximum value X of the monitoring parameter of compressor for cooling fluid 1max;
In determining maximum XmaxThe value X of monitoring parameter is determined after first time period t1 latert1;
Work as Xt1Less than XmaxAnd meet (Xmax-Xt1)/Xmax≥ΔXWhen, detect valve blocking, wherein ΔXIt is predetermined 's.
Fig. 2 shows these method and steps according to the chart of the curve of the I and T of the function as time t.In the chart Directly illustrate the time graph of the rotational speed omega of motor.Here, in shown form of implementation according to the method for the present invention, Maximum speed ω is being detected for the first timemaxLater, scheduled initial time section t0 is waited for first, to determine XmaxBefore may be used Adjust certain pressure ratio/pressure dependence balance.Typically, t0 is at least 5 minutes, preferably at least 10 minutes, particularly preferably Ground at least 15 minutes.
In typical applicable cases similar with Fig. 2, for example, at the beginning between so that electric current I is increased to X after section t0max In the value of=0.85A.Similarly, in this typical applicable cases, at the beginning between after section t0, so that temperature T is increased to Such as XmaxIn the value of=70 DEG C (corresponding to 90 DEG C measured in 20 DEG C of environment temperature).
Determining XmaxPass through after first time period t1 later, determines Xt1, wherein t1 be typically at least 3 hours, it is excellent Selection of land at least 5 hours, particularly preferably at least 6 hours.That is, detecting maximum speed ω for the first timemaxWith determining Xt1 Between elapsed time be t0+t1.In typical applicable cases similar with Fig. 2, electric current I is made after first time period t1 Drop to value Xt1=0.425A, exactly, such as equal in the value for relatively reducing 20% to 50%.Similarly, this In typical applicable cases, after first time period t1, temperature T is made to drop to such as Xt1=50 DEG C (corresponding at 20 DEG C 70 DEG C when environment temperature) value on.
Can be Δ according to the type of compressor for cooling fluid 1XPredetermined special value, wherein typically meet, ΔX≥ 0.2, preferably ΔX>=0.4, particularly preferably ΔX≥0.5.It can preferably be obtained in laboratory test and corresponding type The value matched.In the shown embodiment of Fig. 2, (Xmax-Xt1)/Xmax≈0.56.That is, in predetermined ΔXWhen=0.5, detect Valve blocking or blocking state.
In the embodiment of fig. 2, in order to ensure by determining Xt1Relatively short checking time section t2 is waited for later, with To determine the current value X of monitoring parameter againt2And check condition (Xmax-Xt2)/Xmax≥ΔX, it was demonstrated that detect valve blocking. Typically, checking time section t2 is 15 seconds to 5 minutes, preferably 30 seconds to 3 minutes, particularly preferably 45 seconds to 1 point and 30 seconds.
In typical applicable cases similar with Fig. 2, electric current I is set to drop to such as X after checking time section t2t2= The value of 0.23A.Similarly, in this typical applicable cases, after checking time section t2, temperature T is made to drop to for example Xt2The value of=18.9 DEG C (corresponding to 38.9 DEG C measured in 20 DEG C of environment temperature).
In the shown embodiment of Fig. 2, (Xmax-Xt2)/Xmax≈0.73.That is, that is, in ΔX=0.5 it is pre- Periodically, it was demonstrated that or successfully have detected valve blocking before confirming.
For the method being illustrated, compressor for cooling fluid 1 has the control system with control electronic device, control electricity Sub-device is arranged for carrying out the method.Preferably, control electronic device also forms the above-mentioned control electronic device of motor.
In the embodiment of fig. 2, control electronic device is arranged for carrying out operation method according to the present invention, root in addition According to the operation method, after confirming valve blocking, the exactly blocking state of motor, stop motor.Correspondingly, in Fig. 2 Lower plot in, rotational speed omega is from maximum (top) speed ωmaxDrop to 0.
After a stop, motor no longer consumes electric current I, on the contrary, the temperature of control electronic device, exactly machine winding It spends T to continue slowly to decline (until environment temperature), therefore in fig. 2, points out the song of T in region after t 2 by a dotted line Line.
Due to after restarting compressor for cooling fluid 1, usually no longer there is the inducement for blocking situation, control electronics dress It sets and can be set to, restart motor after relatively short second time period t3.Typically, second time period t3 is only several Second, for example, at least 3 seconds, preferably at least 6 seconds, particularly preferably at least 15 seconds.In practice, second time period t3 is typically limited It makes 60 minutes maximum.
In the bottom graph of Fig. 2, the different situations after motor is again switched on are pointed out by a dotted line.In these situations One is motor is again with maximum speed ωmaxOperation can be especially this feelings when existing block situation as before Condition.In this case, by detecting maximum speed ωmaxThe described root for detecting valve blocking is started again at immediately According to the method for the present invention.
In particular, blocking situation if no longer existed, but it also may occur in which such situation, that is, the wherein rotating speed of motor ω is in maximum speed ωmaxUnder.In this case, no longer start for detecting described in valve blocking according to the present invention Method, but once subsequently detect maximum speed ωmaxJust start again at this method.
It should be noted that control system there can be reservoir, in reservoir, detecting or confirming to write after blocking state Corresponding fault message down, then, especially for diagnostic purpose, the fault message can be read from reservoir again.In addition, Reservoir can be used for being stored according to the method for the present invention for special existing compressor for cooling fluid 1 or transferring during operation method Value, particularly for store be used for ΔX, t0, t1, t2 and t3 value.
Reference numerals list
1 compressor for cooling fluid
The case of 2 compressor for cooling fluid
3 cylinder cases
4 driving units
5 cylinder caps
6 valve plates
7 bolts
8 pressure pipes guided outward
9 suction silencers
10 bent axles
The electric current that I is born by motor
The temperature of the control electronic device of T motors or the machine winding of motor
The t times
T0 initial time sections
T1 first time period
T2 checking time sections
T3 second time periods
The rotating speed of ω motors
ωmaxThe maximum speed of motor

Claims (17)

1. the method for valve blocking of the one kind for detecting compressor for cooling fluid (1), the compressor for cooling fluid (1) have driving unit (4) have for driving piston-cylinder-unit with piston-cylinder-unit for recycling compression coolant, the driving unit (4) Motor, wherein monitor the rotating speed (ω) of the motor, which is characterized in that detect the maximum speed of the motor first (ωmax), if the rotating speed (ω) of the motor substantially corresponds to the maximum speed (ωmax), execute following steps:
Determine the maximum value X of the monitoring parameter (I, T) of the compressor for cooling fluid (1)max;
Determining the maximum value XmaxThe value X of the monitoring parameter (I, T) is determined after first time period (t1) latert1;
Work as Xt1Less than XmaxAnd meet (Xmax-Xt1)/Xmax≥ΔXWhen, detect valve blocking, wherein ΔXIt is scheduled.
2. according to the method described in claim 1, it is characterized in that, ΔX>=0.2, preferably ΔX>=0.4, particularly preferably ΔX ≥0.5。
3. method according to any one of claim 1 to 2, which is characterized in that the monitoring parameter is electrical consumption Electric current (I), or be the temperature of the machine winding for controlling electronic device, particularly motor or motor of the compressor for cooling fluid (1) It spends (T).
4. according to the method in any one of claims 1 to 3, which is characterized in that turn in the highest for detecting the motor Speed (ωmax) after initial time section (t0) after just determining maximum Xmax。
5. according to the method described in claim 4, it is characterized in that, the initial time section (t0) be at least 5 minutes, preferably At least 10 minutes, particularly preferably at least 15 minutes.
6. the method according to any one of claims 1 to 5, it is characterized in that, verification after detecting valve blocking After period (t2), the value X of the monitoring parameter (I, T) is determinedt2, and work as Xt2Less than XmaxWhen and (Xmax-Xt2)/Xmax≥ ΔXWhen, it was demonstrated that detect valve blocking.
7. according to the method described in claim 6, it is characterized in that, the checking time section (t2) is 15 seconds to 5 minutes, preferably It is 30 seconds to 3 minutes, particularly preferably 45 seconds to 1 point and 30 seconds.
8. method according to any one of claim 1 to 7, which is characterized in that the first time period (t1) is at least 3 Hour, preferably at least 5 hours, particularly preferably at least 6 hours.
9. method according to any one of claim 1 to 8, which is characterized in that after detecting valve blocking, for its Corresponding fault message is write in the reservoir that can be read of setting.
10. the method according to any one of claim 6 to 9, if being subordinated to claim 6, it is characterized in that, After confirmation detects valve blocking, corresponding fault message is write in the reservoir that can be read for its setting.
11. one kind is for running the operation method of compressor for cooling fluid (1), the operation method include according to claim 1 to Method described in any one of 10, wherein stop motor after detecting valve blocking.
12. one kind is for running the operation method of compressor for cooling fluid (1), the operation method include according to claim 6 to Method described in any one of 10, if being subordinated to claim 6, wherein stop motor after confirmation detects valve blocking.
13. the operation method according to any one of claim 11 to 12, which is characterized in that second time period (t3) it After restart motor.
14. operation method according to claim 13, which is characterized in that the second time period (t3) is at least 3 seconds, excellent Selection of land at least 6 seconds, particularly preferably at least 15 seconds.
15. the operation method according to any one of claim 13 to 14, which is characterized in that the second time period (t3) It is 60 minutes maximum.
16. one kind being used for the control system of compressor for cooling fluid (1), which includes driving unit (4) and uses In piston-cylinder-unit of cycle compression coolant, wherein the driving unit (4) has for driving the piston-cylinder-mono- The motor of member, the control system have control electronic device, which is characterized in that the control electronic device is arranged for reality Apply method according to any one of claim 1 to 10 and/or for implementing according to any one of claim 11 to 15 The operation method.
17. a kind of compressor for cooling fluid (1), piston-cylinder-unit with driving unit (4) and for recycling compression coolant, Wherein, the driving unit (4) has the motor for driving piston-cylinder-unit, which is characterized in that the compressor for cooling fluid (1) include control system according to claim 16.
CN201780007006.3A 2016-01-18 2017-01-16 Method for detecting valve locking of coolant compressor and control system of coolant compressor Expired - Fee Related CN108700051B (en)

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EP3405673B1 (en) 2019-08-28
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