WO2009077304A2 - Procédé et appareil de commande permettant de commander un compresseur - Google Patents

Procédé et appareil de commande permettant de commander un compresseur Download PDF

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Publication number
WO2009077304A2
WO2009077304A2 PCT/EP2008/066409 EP2008066409W WO2009077304A2 WO 2009077304 A2 WO2009077304 A2 WO 2009077304A2 EP 2008066409 W EP2008066409 W EP 2008066409W WO 2009077304 A2 WO2009077304 A2 WO 2009077304A2
Authority
WO
WIPO (PCT)
Prior art keywords
operating state
compressor
power
temperature
state
Prior art date
Application number
PCT/EP2008/066409
Other languages
German (de)
English (en)
Other versions
WO2009077304A3 (fr
Inventor
Jan-Grigor Schubert
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EP08861736A priority Critical patent/EP2225503A2/fr
Priority to CN2008801213690A priority patent/CN101903716A/zh
Publication of WO2009077304A2 publication Critical patent/WO2009077304A2/fr
Publication of WO2009077304A3 publication Critical patent/WO2009077304A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0253—Compressor control by controlling speed with variable speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to the control of a variable power compressor, in particular a compressor for a refrigeration device.
  • the path on which a piston of the compressor can move is given, and the power of the compressor is variable by the speed of the drive and thus the frequency of the piston movement is varied.
  • the piston is generally part of a resonant system and the frequency of the piston movement is determined by the resonant frequency of that system.
  • the compressor power is variable by varying the amplitude of the piston movement or by periodically switching off the drive so that alternate periods of high piston amplitude and those with a stationary piston during an operating period of the compressor with on average less than full power.
  • thermostat control in which a control circuit in response to a temperature measured by a sensor at a temperature to be cooled on a compressor on or off. If the power of the compressor can not be changed in a switch-on phase, then it must be set large enough to keep the mass at a desired temperature even in phases of high thermal stress. In phases of low thermal stress, the power is correspondingly oversized. As a result, an evaporator fed by the compressor and in thermal contact with the mass is cooled to a much lower temperature than the setpoint temperature of the mass in an operating phase of the compressor. The lower the evaporator temperature, the worse the thermal efficiency of the refrigerator; that is, it consumes energy unnecessarily.
  • DE 10 2004 048 802 A1 discloses a compressor which can optionally be operated in a normal mode and in an energy-saving mode with reduced power compared to the normal mode.
  • a decision on the capacity of the compressor is based on the measured temperature in the refrigerator: as long as this is within a predetermined range, the compressor is operated in the reduced power mode; only when leaving this area, the compressor is switched to full power.
  • the compressor always starts with reduced power and only switches to full power when the reduced proves to be insufficient to keep the temperature in the desired range, the temperature is at the upper edge of the allowable range for a long time, especially at times of high thermal load , That Ironically, at times when rapid cooling is desired, for example, during a party continuously newly set drinks quickly cool down, the cooling power required for this is always available with considerable delay.
  • the object of the present invention is to provide a method for controlling a compressor of a refrigerating machine, which enables energy-saving operation and at the same time is able to quickly provide a high cooling capacity if required.
  • the object is achieved by a method for controlling a compressor of a refrigerating machine, which can be switched between at least three operating states of different power, with the steps a. Decide on the need to switch the compressor to a different operating condition than the one with the lowest power, based on the temperature of a mass cooled by the chiller, and b. Selecting the other operating state based on the time duration of an earlier activated operating state.
  • the operating state switched on earlier is the operating state active at the time of step b.
  • said previously turned-on operating state is a lowest-power operating state
  • the number of operating states is at least four, and as said other operating state, the operating state of the second highest power is selected if the time duration is above the first limit value and below a second limit value.
  • the active operating state in which the chiller is located during step a) may also be a state with a power other than the lowest.
  • the other operating state selected in step b) has a higher power than the active operating state, and it is switched to the other operating state when the time exceeds a limit. Ie. if it turns out that the cooling capacity of the active operating state is not sufficient to reach a threshold from which it should be switched to the state of lowest cooling capacity, the cooling capacity is automatically increased.
  • the lowest power is zero, but it can also be positive.
  • Subject of the invention is also a control device for a compressor, which is configured to carry out the method described above.
  • FIG. 1 is a flowchart of a control method for a compressor in a refrigerator according to a first embodiment of the invention
  • the inventive method is applicable to the control of a compressor of a refrigerator, in particular the refrigerator of a household refrigeration device of any known type.
  • the components of such a refrigerator are familiar to those skilled in the art and therefore need not be described here with reference to a separate figure become.
  • a refrigerator with a heat-insulated storage room, which is a thermal mass to be kept cold
  • a refrigerator which combines an evaporator in thermal contact with the storage room, a condenser and a compressor in a refrigerant circuit.
  • a control circuit which can be implemented, for example, as a microcontroller, controls the power of the compressor based on a temperature detected by a temperature sensor at the storage space.
  • Fig. 1 shows a first embodiment of a method carried out by the control circuit for controlling the operation of the compressor. Due to the iterative nature of the method, the initial state can be chosen arbitrarily for its description. In Fig.
  • step S1 is assumed as an initial state that the compressor is in operation and that the temperature of the storage space above a Abschaltschwelltemperatur T ⁇ nf is.
  • step S6 the value of the timer t is compared with a first threshold t1.
  • step S7 the power of the compressor for a subsequent phase of operation is set to a low value P mm .
  • step S8 a second threshold t2 is compared which is lower than t1. If t is greater than t2, the compressor power is set to a mean value P m ⁇ d in step S9. If t is less than or equal to t2, this indicates a high thermal load of the storage space, and in step S10, the power of the compressor is set to its maximum value P max .
  • step S7 After determining the compressor capacity in step S7, S9 or S10, the process returns to the initial state.
  • the different powers P m i n ,, P m ed, P m a x can be realized by operation at different rotational speeds.
  • the power can also be varied by changing the piston amplitude.
  • power control is preferably carried out in the form of intermittent operation: while in the state of maximum power P max the compressor runs continuously at maximum amplitude, alternate at lower powers P min , P med , phases in which the compressor is running at maximum amplitude, and phases in which it is off, with a predetermined duty cycle. As long as an operating state with a smaller than the maximum power stops, the switching on and off of the compressor is not temperature but time-controlled.
  • the initial state of the method illustrated in FIG. 2 is a minimum power operating state of the compressor. This may be an off-state, as in the case of FIG. 1, but the power may be nonzero and chosen to delay, but not prevent, a temperature rise in the storage space.
  • step S6 After exceeding the on threshold temperature T sup in step S5, it is checked in step S6 'whether the duration of the current minimum power state exceeds a threshold t4.
  • step S7 the timer t is set back to zero, and in step S8' a power P md for the compressor is selected which is between its maximum power P max and the minimum power of the previous operating state.
  • step S9 the timer t is incremented, and in step S10', it is checked whether the resulting count value of the timer has exceeded another limit value t3. This is initially not the case, so that the method proceeds to step S11 ', in which it is checked whether the Abschaltschwelltemperatur T ⁇ nf reached or fallen below.
  • step S9 ' the method returns to step S9 ', and steps S9' to S1 1 'are repeated until either t> t3 has been satisfied or the switch-off threshold temperature has been undershot.
  • the power P m ⁇ d it is assumed that the power P m ⁇ d is insufficient to make the storage space more acceptable As a result, the power of the compressor is raised to the maximum value P max in step S12 '.
  • the process returns to step S2, resetting the timer t and resetting the compressor power to the minimum value.
  • Steps S1 to S10 are the same as described with reference to FIG. A difference from the method of FIG.
  • step S1 1 lies in the fact that in each case after setting the compressor power P to the smallest positive value P min or the mean value P md in step S9, the timer t is reset (step S1 1 "), then (step S12 "), the timer t is incremented and is checked on the basis of the count of the timer (S13"), whether the time spent in the operating state with minimum or average power P m , n or P m ⁇ d time is greater than t3 Method to step S10, that is, the power of the compressor is set to the maximum value P max .
  • step S14 again checks for a drop below the switch-off threshold temperature T mf . As long as this is not exceeded, the method returns to step S12 ", once it has been reached, it returns to step S2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Air Conditioning Control Device (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention concerne un procédé permettant de commander un compresseur d'une machine frigorifique qui peut être commuté entre au moins trois états de fonctionnement de puissance différente (0, e, Pmin, Pmed, Pmax). Le procédé comprend les étapes qui consistent a) à décider (S1, S3; S11', S3; S11', S10', S12') de la nécessité de commuter le compresseur dans un autre état de fonctionnement (Pmin, Pmed, Pmax) que celui avec la plus faible puissance (0, e), à l'aide de la température (T) d'une masse refroidie par la machine frigorifique, puis b) à sélectionner (S6, S8; S6', S10'; S6, S13') ledit autre état de fonctionnement (Pmin, Pmed, Pmax) à l'aide de la durée (t1, t2;t4, t3) d'un état de fonctionnement préalablement commuté.
PCT/EP2008/066409 2007-12-18 2008-11-28 Procédé et appareil de commande permettant de commander un compresseur WO2009077304A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP08861736A EP2225503A2 (fr) 2007-12-18 2008-11-28 Procédé et appareil de commande permettant de commander un compresseur
CN2008801213690A CN101903716A (zh) 2007-12-18 2008-11-28 用于控制压缩机的方法和控制装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007060828.6 2007-12-18
DE102007060828A DE102007060828A1 (de) 2007-12-18 2007-12-18 Verfahren und Steuergerät zum Steuern eines Verdichters

Publications (2)

Publication Number Publication Date
WO2009077304A2 true WO2009077304A2 (fr) 2009-06-25
WO2009077304A3 WO2009077304A3 (fr) 2009-09-17

Family

ID=40689495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/066409 WO2009077304A2 (fr) 2007-12-18 2008-11-28 Procédé et appareil de commande permettant de commander un compresseur

Country Status (5)

Country Link
EP (1) EP2225503A2 (fr)
CN (1) CN101903716A (fr)
DE (1) DE102007060828A1 (fr)
RU (1) RU2010126744A (fr)
WO (1) WO2009077304A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079205A1 (de) 2011-07-14 2013-01-17 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät und Verfahren zum Betreiben eines Verdichters
US10569620B2 (en) * 2016-06-30 2020-02-25 Emerson Climate Technologies, Inc. Startup control systems and methods to reduce flooded startup conditions
CN112268379A (zh) * 2020-11-18 2021-01-26 珠海格力电器股份有限公司 热泵系统及其控制方法、装置以及空调设备、存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246451A (en) * 1990-04-24 1992-01-29 Toshiba Kk Heat exchanger
EP0981033A2 (fr) * 1998-08-20 2000-02-23 Carrier Corporation Procédé pour faire fonctionner un système frigorifique en régime permanent
EP1126223A1 (fr) * 1998-10-26 2001-08-22 Toshiba Carrier Corporation Unite de commande de d'entrainement d'un systeme de conditionnement d'air comprenant un dispositif exterieur
US20020134094A1 (en) * 2001-03-26 2002-09-26 Deok Huh Method for controlling air conditioner having multi-compressor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100608673B1 (ko) 2004-06-11 2006-08-08 엘지전자 주식회사 왕복동식 압축기의 운전제어장치 및 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246451A (en) * 1990-04-24 1992-01-29 Toshiba Kk Heat exchanger
EP0981033A2 (fr) * 1998-08-20 2000-02-23 Carrier Corporation Procédé pour faire fonctionner un système frigorifique en régime permanent
EP1126223A1 (fr) * 1998-10-26 2001-08-22 Toshiba Carrier Corporation Unite de commande de d'entrainement d'un systeme de conditionnement d'air comprenant un dispositif exterieur
US20020134094A1 (en) * 2001-03-26 2002-09-26 Deok Huh Method for controlling air conditioner having multi-compressor

Also Published As

Publication number Publication date
RU2010126744A (ru) 2012-01-27
DE102007060828A1 (de) 2009-06-25
EP2225503A2 (fr) 2010-09-08
CN101903716A (zh) 2010-12-01
WO2009077304A3 (fr) 2009-09-17

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