EP3555474A1 - Steuerungseinrichtung und verfahren zum betreiben eines kältemittelkompressors - Google Patents
Steuerungseinrichtung und verfahren zum betreiben eines kältemittelkompressorsInfo
- Publication number
- EP3555474A1 EP3555474A1 EP17821607.3A EP17821607A EP3555474A1 EP 3555474 A1 EP3555474 A1 EP 3555474A1 EP 17821607 A EP17821607 A EP 17821607A EP 3555474 A1 EP3555474 A1 EP 3555474A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crankshaft
- rotational speed
- refrigerant compressor
- braking
- control device
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 131
- 239000003507 refrigerant Substances 0.000 title claims abstract description 121
- 230000008569 process Effects 0.000 claims abstract description 110
- 238000007906 compression Methods 0.000 claims abstract description 43
- 230000006835 compression Effects 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 30
- 238000012886 linear function Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 8
- 230000009467 reduction Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B55/00—Bags for golf clubs; Stands for golf clubs for use on the course; Wheeled carriers specially adapted for golf bags
- A63B55/40—Bags with partitions or club holders
-
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B55/00—Bags for golf clubs; Stands for golf clubs for use on the course; Wheeled carriers specially adapted for golf bags
- A63B55/60—Wheeled carriers specially adapted for golf bags
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0094—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 crankshaft
-
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2210/00—Space saving
- A63B2210/50—Size reducing arrangements for stowing or transport
-
- 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
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1201—Rotational speed of the axis
-
- 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
- F04B2201/12—Parameters of driving or driven means
- F04B2201/1203—Power on the axis
-
- 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
- F04B2201/12—Parameters of driving or driven means
- F04B2201/127—Braking 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
- F04B2203/0208—Power
-
- 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
Definitions
- the present invention relates to an electronic
- Control device for a refrigerant compressor which at least one drive unit and a standing connected to the drive unit compression mechanism with at least one in a cylinder of a cylinder block of the refrigerant compressor in an operating state of the refrigerant compressor for operational compression of refrigerant reciprocating and driven via a crankshaft of the drive unit Piston
- the electronic control device of the refrigerant compressor is at least configured to detect at least one physical process parameter, preferably the rotational speed of the crankshaft or the power consumption of the refrigerant compressor, to detect a shutdown signal directed to the refrigerant compressor, which shutdown signal terminates an operating phase of the refrigerant compressor, in which phase of operation, the refrigerant compressor with a positive operating Dre is operated as intended, and is adapted to control a torque applied by the drive unit to the crankshaft for adjusting the rotational speed.
- the present invention relates to a refrigerant compressor for use in a refrigerator, preferably in a refrigerator or freezer, wherein the refrigerant compressor comprises an electronic control device according to the invention.
- the present invention relates to a refrigerator, preferably refrigerator or freezer, with an inventive
- the present invention also relates to a method for operating a suitable for use in a refrigerator, preferably in a refrigerator or freezer, refrigerant compressor, which comprises a compression mechanism for compressing refrigerant and a drive unit, wherein the compression mechanism by means of a torque applied to the crankshaft Drive unit is driven.
- Rotational speed variable refrigerant compressors have the advantage that they can be more specifically tailored to the cooling requirements of the object to be cooled by, for example, in the case of lower cooling requirements at a lower rotational speed and in the case of increased cooling demand, can be operated at a correspondingly increased rotational speed.
- refrigerant compressors are well known. They essentially consist of a drive unit and a compression mechanism in the form of a piston reciprocating in a cylinder housing between a first and a second dead center, which is connected via a connecting rod with a crankshaft, which in turn is rotationally rigidly coupled to a rotor of the drive unit ,
- the drive unit is typically a brushless DC motor. It is possible to determine the relative position of the rotor of the DC motor and thus also the rotational speed of the motor or of the compression mechanism on the basis of the induced in the motor winding back-voltage (induction back voltage). This method eliminates the need for separate sensors and is therefore particularly easy to implement and less prone to interference.
- speed is used when the actual instantaneous angular speed of the crankshaft is meant, whereas the term speed of rotation is used when the average number of revolutions per minute of the crankshaft is meant, that is, the value commonly meant when referring to the Speed of a refrigerant compressor speaks.
- a load torque that is increased relative to the suction phase acts on the compression mechanism, which must be overcome by the operating torque of the drive unit to keep the compression process going. This increased load torque leads to a reduction in the speed of the crankshaft during the compression phase.
- this is mounted together with the drive unit via spring elements in a housing.
- the natural frequencies of this vibration system are depending on the compressor type between 5 Hz and 16 Hz.
- Refrigerant compressor at low rotational speeds occur not only in the normal, regulated operation but especially during the stopping process, where these low rotational speeds must be traversed.
- the suspension process usually takes place as follows: Is after a normal, regulated operating phase of the
- Refrigerant compressor within which the refrigerant compressor was operated with a positive operating torque as intended, reaches the target temperature of the object to be cooled, such as a refrigerator compartment of a refrigerator, the electronic control device of the refrigerator sends a signal (shutdown signal) to the electronic control device of the refrigerant compressor, with which communicated is that no more cooling power is needed because the target temperature is reached.
- shutdown signal a signal
- Refrigerant compressor the drive or the positive operating torque, with which the refrigerant compressor was operated as intended during the regulated operating phase switches off (switch-off).
- the stopping process thus begins immediately after the detection of the shutdown signal with the switching off of the positive operating torque.
- crankshaft of the compression mechanism also goes through complete revolutions even after the shut-off time, beginning at the first dead center (crank angle 0 °), first through a suction phase (correctly: suction and re-expansion phase), during which refrigerant is drawn into the cylinder.
- This suction phase theoretically ends when the cylinder has reached the second dead center (crank angle 180 °).
- the compression phase (correct: compression and Ausschiebephase) begins during which the in-cylinder refrigerant is compressed and ejected from the cylinder.
- the compression phase ends theoretically when the piston has reached the first dead center (crank angle 360 °) again.
- the actual compression of the refrigerant begins only at a crank angle of about 210 ° (depending on the refrigerant compressor, the pressure conditions, the valve design, etc.) but in any case after 180 ° and the suction phase at about 30 °, but in any case after the first dead center.
- crankshaft Collapses but is slightly offset backwards in time, initiates the stopping process and causes the crankshaft to be in a non-powered state (with no positive operating torque) and only continues to rotate due to its inertia until it has come to a complete stop, ie its rotational speed is 0. Colloquially, one could also say that the refrigerant compressor "leaks".
- the crankshaft rotates solely due to the kinetic energy it has at the time of turn-off as well as the inertia. It rotates so to speak uncontrolled and its rotational speed behavior is dependent on the load acting on the compression mechanism load torque.
- the load torque leads to a constant reduction in the rotational speed of the crankshaft of the non-driven refrigerant compressor, so that the kinetic energy of the crankshaft is always lower until, depending on the pressure conditions in the refrigerant circuit, is no longer sufficient to overcome the load torque (limiting rotational speed).
- the braking torque which brings about the standstill of the crankshaft can meaningfully be applied only after falling below a certain rotational speed of the crankshaft, since the energy expenditure of a braking torque which causes the crankshaft to rotate at a higher rotational speed than that determined would be disproportionately high.
- the prior art envisages to precede the said braking process with a comparatively long period of time, which period extends between the shut-off signal and the application of the braking torque and in which the crankshaft leaks, without a positive operating torque or to be exposed to this opposing Bremsmomentauslauf.
- the stopping process, which starts at the time of switch-off is set to electronic
- Control device which is usually carried out by the electronics of the refrigerator, in which the refrigerant compressor is used, can thus take place in electronic control devices according to the prior art only when the crankshaft has been brought to a standstill.
- the operation of known rotational speed variable refrigerant compressors at low speeds causes excitation of the vibration system in the range of their natural frequencies and therefore leads to undesirable noise emissions. Since this effect is to be observed particularly strongly during the stopping process, in which the crankshaft of the refrigerant compressor must pass through a rotational speed range which is critical with respect to the generation of noise, as short a stopping process as possible is basically desirable.
- Refrigerant compressor in particular the crankshaft of the
- Refrigerant compressor allows and by operation of the refrigerant compressor at low speeds - ie, in particular during the stopping process - caused noise generation as low as possible.
- a compression mechanism operatively connected to the drive unit having at least one reciprocating refrigerant in one cylinder of a cylinder block of the refrigerant compressor in an operating state of the refrigerant compressor for operationally compressing refrigerant and via one
- At least one physical process parameter preferably the rotational speed of the crankshaft or the power consumption of the
- switch-off signal directed to the refrigerant compressor, which switch-off signal terminates an operating phase of the refrigerant compressor, in which operating phase the refrigerant compressor is operated as intended with a positive operating torque, and is adapted to
- the electronic control device is further adapted to apply a braking torque to the crankshaft immediately after detecting the switch-off signal, wherein the braking torque is opposite to the positive torque prevailing during the operating phase and the amount of this braking torque is a function of the detected physical process parameter, preferably the Rotational speed of the crankshaft or the power consumption of the refrigerant compressor, is.
- the application of the braking torque according to the invention to the crankshaft results in the braking process being directly connected to the operating phase in which the refrigerant compressor was operated with a positive operating torque, and thus starts at the same time as the stopping process.
- a known from the prior art extension of the stopping process by a running out of the crankshaft to reduce the rotational speed before the actual braking process, which is initiated by applying the braking torque, is thus avoided. Instead, the braking process begins in the instant immediately following the detection of the shutdown signal and usually extends to the standstill of the crankshaft.
- the inventive choice of the amount of braking torque as a function of the detected process parameter of the refrigerant compressor allows a particularly energy-efficient braking of the crankshaft, as at different process times during the braking process different braking torques can be applied to the crankshaft.
- the choice of the braking torque as a function of the rotational speed of the crankshaft of the refrigerant compressor has been found, especially since high braking torques at the beginning of the braking process - ie when the rotational speed is still high - associated with increased energy loss.
- a rapid and at the same time energy-efficient stopping of the crankshaft can be accomplished by varying the applied braking torque over the entire braking process as a function of the respective rotational speed of the crankshaft.
- the physical process parameter is the rotational speed of the crankshaft.
- the amount of the applied to the crankshaft braking torque immediately after detecting the shutdown signal is indirectly proportional to that rotational speed of the crankshaft which holds the crankshaft at the moment of detecting the shutdown signal.
- the braking torque applied to the crankshaft at the beginning of the braking process - ie immediately after detection of the switch-off signal - in the case of high or low rotational speeds during the Shutdown signal previous operating phase selected lower or higher.
- a corresponding choice of the braking torque leads to a further reduction of the stopping process, since the crankshaft is already exposed to a high braking torque at the beginning of the stopping process.
- the selection of the braking torque according to the invention leads to a lower energy demand over long stretches of the stopping process, whereas the stopping process according to the invention in comparison with stopping processes with a phase of leakage of the crankshaft according to the prior art by the braking torque applied at the beginning of the stopping process is nevertheless shortened.
- the braking torque applied to the crankshaft forms a braking profile, wherein a function determining the course of the brake profile is stored by the electronic control device and preferably a linear dependence on the respective current rotational speed of the crankshaft and / or the elapsed time since detection of the shutdown signal.
- the realization of the braking torque as a braking profile, which brake profile represents the time profile of the braking torque, allows an optimal adjustment of the amount of the braking torque to the decreasing during the stopping process rotational speed of the crankshaft.
- Based on the value of the braking torque at the beginning of the stopping process - ie immediately after detecting the switch-off signal - it is possible, for example, to increase the amount of braking torque applied in the course of the stopping process, in order to successively increase the braking effect. This can be done depending on the actual rotational speed of the crankshaft, which in turn depends on the applied braking torque and decreases further as the duration of the stopping process continues.
- the electronic control device is adapted to, in a extending between the detection of the shutdown signal and the standstill of the crankshaft braking period, the rotational speed of the crankshaft, preferably several times, more preferably constantly, with predetermined To compare rotational speed values.
- the crankshaft is in each case during the braking period.
- the current rotational speed several times or as often as technically possible, so constantly, during the braking period to match the predetermined rotational speed values.
- the function determining the brake profile which is stored by the electronic control device, for each rotational speed regime, ie for each all between two of the predetermined rotational speed values values of the current rotational speed of the crankshaft, a different value or a different course (For example, slope, curvature) determines the applied brake profile.
- the course of the braking profile essentially follows a piecewise linear function, each of the predetermined rotational speed values is assigned a portion of the braking period, within which this piecewise linear function is a substantially constant pitch having.
- the electronic control device allows the braking period in any number of sections subdivide, wherein the braking profile in each of these sections follows the course of a linear function with a specific slope associated with the respective area.
- the brake profile can be applied to the crankshaft in a particularly simple, stable and easily implementable manner and, at the same time, an optimum adaptation of the respective braking torque to the instantaneous speed of the crankshaft can be ensured.
- the term piecewise linearity in the present document is to be interpreted in such a way that the value of the slope can assume any real number, in particular also zero. In this sense, it may be provided that the function determining the course of the brake profile is constant within a portion of the braking period, wherein said slope would be zero in this section, in accordance with the above diction.
- the resulting from the course of the braking profile amount of the braking torque of a monotonically increasing from the time of detection of the shutdown signal at the time of the standstill of the crankshaft function of the elapsed since the detection of the shutdown signal time follows.
- the control means is the amount of the braking torque of a monotonically increasing (increasing or decreasing) from the time of detection of the shutdown signal at the time of the standstill of the crankshaft, preferably strictly monotonically increasing (increasing), the time elapsed since the detection signal was detected follows, it is ensured that the braking effect, which is exposed to the crankshaft immediately after detecting the switch-off signal, during the entire stopping process increases or at least not smaller. As a result, a rapid and energy-efficient stopping of the crankshaft-at first independent of the instantaneous value of the rotational speed and its concrete course during the entire braking period-can be ensured.
- An object of the present invention is also achieved by a refrigerant compressor for use in a refrigerator, preferably in a refrigerator or freezer, wherein the refrigerant compressor comprises an electronic control device according to the invention.
- An object of the invention is also achieved in a refrigerator, preferably a refrigerator or freezer, with a refrigerant compressor according to the invention having an electronic control device.
- An object of the invention is in a method for operating a suitable for use in a refrigerator, preferably in a refrigerator or freezer, refrigerant compressor, which comprises a compression mechanism for compressing refrigerant and a drive unit, wherein the compression mechanism by means of a torque applied to the crankshaft Drive unit is driven, solved in that it comprises the following steps:
- Detecting a physical process parameter preferably a rotational speed of the crankshaft or a
- Amount of braking torque is a function of the detected physical process parameter, preferably the
- the method according to the invention makes it possible for the braking process to begin immediately after the detection signal has been detected and thus simultaneously with the stopping process.
- the braking process that is to say in particular the amount of the braking torque applied immediately after detection of the switch-off signal, that is to say the magnitude of a torque opposing the operating torque, to that operating phase which was terminated by the switch-off signal.
- the stopping process of the crankshaft as a whole is significantly shortened, which can reduce both the noise and the associated with the crankshaft causing the braking torque energy consumption during the stopping process.
- the physical process parameter is the rotational speed of the crankshaft.
- this embodiment enables a particularly efficient and rapid stopping of the crankshaft.
- the amount of the applied to the crankshaft braking torque immediately after detecting the switch-off signal substantially indirectly proportional to that
- the braking torque is maintained at least in sections within a braking period, but preferably until the crankshaft stops, the braking period being that period between the detection of the switch-off signal and the standstill of the crankshaft.
- the braking torque is applied in the form of a brake profile to the crankshaft, wherein a function determining the course of the brake profile is stored by the electronic control device, and preferably a linear dependence on the respective current Rotational speed of the crankshaft and / or from the time since detection of the shutdown signal time comprises.
- the braking torque necessary for stopping the crankshaft can be varied over the entire braking process, which can be used to further shorten the stopping process.
- the resulting from the course of the braking profile amount of the braking torque monotonically increases from the time of detection of the shutdown signal at the time of the standstill of the crankshaft.
- the crankshaft In order to determine in which of a plurality of rotational speed regimes determined by the concrete selection of the predetermined rotational speed values, the crankshaft is in each case during the braking period, it is provided in a preferred embodiment of the method according to the invention that during the braking period, the rotational speed of the crankshaft, preferably repeatedly, more preferably constantly, is compared with predetermined rotational speed values and the braking period is divided into process periods at least in sections, preferably the entire braking period, wherein in each of these process periods, the rotational speed of the crankshaft is in each case in a value range which is assigned to one of the predetermined rotational speed values.
- the course of the braking profile essentially follows a piecemeal linear function of the process time, this function in each process time segment having a section with a constant gradient having.
- FIG. 1 two diagrams corresponding to one another, which represent a stopping process controlled by means of a control device according to the invention. WAYS FOR CARRYING OUT THE INVENTION
- FIG. 1 shows two diagrams corresponding to one another, which in each case function as the rotational speed n of a crankshaft of a refrigerant compressor and the torque M applied to the crankshaft during an operating phase II in which the refrigerant compressor is operated as intended, as well as during a stopping process III following this operating phase the process time t.
- a drive unit of the refrigerant compressor sets the crankshaft of the refrigerant compressor in motion. After the crankshaft has first been moved to a predetermined position in the course of a corresponding starting operation I of the refrigerant compressor, the crankshaft is accelerated from this position to a predetermined rotational speed n start .
- the starting process I is completed and the refrigerant compressor is ready to be used, as required, by a cooling device in which the refrigerant compressor is used.
- the crankshaft maintains the rotational speed n start . Achieving and maintaining the starting speed ⁇ start can be achieved according to the invention by means of an open control loop.
- the rotational speed n the crankshaft by means of a closed loop from the start speed n start on a in a range between about 700 revolutions per minute (hereinafter abbreviated abbreviated rpm) and 4000 rpm and corresponding to the predetermined demand for cooling capacity corresponding rotational speed target value n set .
- a specific, positive operating torque M is applied to the crankshaft, which in coordination with a measured value of the current rotational speed n the crankshaft is varied until the rotational speed target value n Soll is reached.
- This setpoint rotational speed n setpoint is maintained until the required cooling capacity has been made available to the cooling device and, as a result, the desired temperature is reached in the cooling device or a region of the cooling device, such as the freezer compartment of a refrigerator.
- the electronic control device applies to the crankshaft a torque which is in the opposite direction to the torque prevailing in operating phase II (its direction), ie, a braking torque, and thus simultaneously initiates the braking process.
- the stopping process III thus has no known from the prior art, the braking process preceding period in which the crankshaft uncontrollably expires to reduce the rotational speed of the crankshaft before applying the braking torque below a certain, sufficiently low value.
- the stopping process is significantly shortened overall, which is accompanied by a shortening of the time within which the refrigerant compressor passes through a critical rotational speed range, ie the range between approximately 700 rpm and 0 rpm, with regard to noise generation.
- the braking torque applied to the crankshaft immediately after detection of the shutdown signal is a function of the rotational speed which the crankshaft is to Time of detecting the shutdown signal is pending.
- the braking torque applied to the crankshaft immediately after the detection signal is detected is smaller in the case of a high target value of the rotational speed n Soll of the crankshaft at the time of detecting the cut-off signal than in the case of FIG low Rotational speed n target of the crankshaft at the time of detecting the turn-off signal.
- the amount of the braking torque applied to the crankshaft immediately after detecting the cut-off signal is thus indirectly proportional to the rotational speed n Soll that the crankshaft has at the time of detecting the cut-off signal.
- another detected, physical process parameter for example the power consumption of the refrigerant compressor, takes the place of the rotational speed of the crankshaft - the braking torque thus the function of another process parameter is.
- the braking torque applied at the beginning of the stopping process initially leads to a comparatively weak deceleration of the crankshaft, whereas the braking effect is comparatively high when the crankshaft has a low rotational speed n setpoint at the time of detecting the turn-off signal.
- crankshaft Due to the already beginning simultaneously with the start of the stopping process braking process, the rotational speed of the crankshaft decreases faster than in refrigerant compressors according to the prior art, in which the crankshaft initially uncontrollably expires for the purpose of speed reduction before the braking torque, which eventually bring about the complete standstill of the crankshaft and prevent reversal of the direction of rotation at the last moment of the stopping process is applied to the crankshaft.
- the braking torque applied to the crankshaft constitutes a braking profile extending over an entire braking period extending between the detection of the switch-off signal and the standstill of the crankshaft. This means that the crankshaft is subjected to a braking torque during the entire braking period. The amount of this braking torque, which results from the course of the brake profile, increases monotonically from the time of detection of the switch-off signal to the standstill of the crankshaft.
- the course of the brake profile may itself in turn contain a function of the respectively current rotational speed of the crankshaft and / or the process time t (eg elapsed since the beginning of the stopping process), a function determining this course being stored by the control device according to the invention.
- the braking period is subdivided into four (Scenario 1) or two (Scenario 2) process time sections (T lr T 2 , T 3 , T 4 and T llr T 22, respectively) without impairing the general public.
- each of these process time periods is the respective rotational speed of the crankshaft, which is monitored by the electronic control device with high frequency, for example, with a frequency higher than 10 Hz, and with predefined values (n lr n 2 , n 3 , n 0 or n 3 , n 0 ) of the rotational speed is compared, each in an area which is assigned to a predefined value of the rotational speed.
- the braking profile extending over the entire braking period and thus over all process periods (T lr T 2 , T 3 , T 4 or Tu, T 22 ) can be designed such that it follows the course of a piecewise linear function of the process time t the slope of this function in each individual one of the process time segments (T lr T 2 , T 3 , T 4 and T llr T 22 ) each has a different, constant value.
- the said slope of the said piecewise linear function of the process time t assumes the value zero - the brake profile applied to the crankshaft, more precisely its magnitude, is therefore constant in the last process period (T 4 in the case of scenario 1, T 22 in the case of scenario 2) of the braking period.
- the braking behavior caused by the electronic control device according to the invention during the final, immediately before the standstill of the crankshaft, process time portion differs from that of the remaining process periods, within which the amount of braking torque monotonically increases or increases.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT502662016 | 2016-12-19 | ||
PCT/EP2017/083591 WO2018114978A1 (de) | 2016-12-19 | 2017-12-19 | Steuerungseinrichtung und verfahren zum betreiben eines kältemittelkompressors |
Publications (2)
Publication Number | Publication Date |
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EP3555474A1 true EP3555474A1 (de) | 2019-10-23 |
EP3555474B1 EP3555474B1 (de) | 2021-06-30 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17821607.3A Active EP3555474B1 (de) | 2016-12-19 | 2017-12-19 | Steuerungseinrichtung und verfahren zum betreiben eines kältemittelkompressors |
Country Status (3)
Country | Link |
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US (1) | US20200088188A1 (de) |
EP (1) | EP3555474B1 (de) |
CN (1) | CN110300850B (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3534000B1 (de) * | 2018-03-01 | 2020-08-05 | Secop GmbH | System umfassend einen kältemittelkompressor und verfahren zum betreiben des kältemittelkompressors |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101278476A (zh) * | 2005-10-07 | 2008-10-01 | Lg电子株式会社 | 节电型压缩机和具有该压缩机的冰箱及控制该冰箱的方法 |
BRPI1100026A2 (pt) * | 2011-01-26 | 2013-04-24 | Whirlpool Sa | sistema e mÉtodo de controle para compressores reciprocos |
DE102012209522A1 (de) * | 2012-06-06 | 2013-12-12 | Robert Bosch Gmbh | Verfahren zum Betreiben eines rekuperativen Bremssystems eines Fahrzeugs und Steuervorrichtung für ein rekuperatives Bremssystem eines Fahrzeugs |
DE102012024400A1 (de) * | 2012-12-13 | 2014-06-18 | Wabco Gmbh | Verdichter zur Erzeugung von Druckluft, Druckluftversorgungsanlage, pneuma-tisches System und Verfahren zum Betrieb eines Verdichters |
-
2017
- 2017-12-19 CN CN201780084761.1A patent/CN110300850B/zh active Active
- 2017-12-19 US US16/470,779 patent/US20200088188A1/en not_active Abandoned
- 2017-12-19 EP EP17821607.3A patent/EP3555474B1/de active Active
Also Published As
Publication number | Publication date |
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US20200088188A1 (en) | 2020-03-19 |
CN110300850A (zh) | 2019-10-01 |
CN110300850B (zh) | 2021-06-15 |
EP3555474B1 (de) | 2021-06-30 |
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