EP0881443A1 - Circuit économiseur pour appareil frigorifique alimenté par secteur et procédé de commande de ce circuit - Google Patents

Circuit économiseur pour appareil frigorifique alimenté par secteur et procédé de commande de ce circuit Download PDF

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Publication number
EP0881443A1
EP0881443A1 EP97108502A EP97108502A EP0881443A1 EP 0881443 A1 EP0881443 A1 EP 0881443A1 EP 97108502 A EP97108502 A EP 97108502A EP 97108502 A EP97108502 A EP 97108502A EP 0881443 A1 EP0881443 A1 EP 0881443A1
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EP
European Patent Office
Prior art keywords
cooling device
switching sequence
saving circuit
power
mains
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.)
Withdrawn
Application number
EP97108502A
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German (de)
English (en)
Inventor
Urs Künzle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP97108502A priority Critical patent/EP0881443A1/fr
Publication of EP0881443A1 publication Critical patent/EP0881443A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/23—Time delays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/04—Sensors detecting the presence of a person

Definitions

  • the invention relates to a power saving circuit for a mains operated Refrigerator, especially for a mini bar in one Hotel room, according to claim 1, and a method to control the same according to claim 8.
  • minibar small fridge
  • the hotel guest chilled drinks etc. provided.
  • To noise pollution due to the intermittent operation of the minibar small refrigerators of the absorber type are usually to be avoided used.
  • the content of the minibar will generally around the clock at an average temperature kept at around 5 ° C and thus available to the guest posed. This is usually the case even if the Demand for chilled drinks etc. only for a few Hours per day is really available.
  • a disadvantage This common solution is the relatively high energy consumption.
  • the object of the invention is therefore a power saving circuit and a method for controlling the same specify that for a refrigerator, especially for a minibar in a hotel room, are applicable, and those mentioned Do not have disadvantages.
  • An additional task is that the invention for refrigerators and minibars different origins should be applicable no replacement or modification of the existing devices required should do.
  • the solution is essentially based on the fact that the power saving circuit as a separate device in the refrigerator Mains supply can be connected upstream and that the power saving circuit has a sensor element which is used in the detection a sensor output signal to a person in the vicinity of the cooling device emits that in a control logic for generation a switching sequence is used with which the mains power supply is controlled for the refrigerator.
  • one of the main advantages of the present invention lies in that with the introduction of the present power-saving circuit no new and expensive refrigerators are bought and that neither on the cooling units nor on the electrical installations of the power supply - apart from from the interposition of the power-saving circuit according to the invention - any changes are necessary.
  • the Design provided with a sensor for detecting the Presence of a person in the vicinity of the cooling device also ensures that even with different user behavior always a satisfactory cooling performance is provided and that the existing energy saving potential nonetheless can be largely used.
  • switching sequence generated by the control logic from three parts, which are used depending on the situation.
  • Transitional portion A second part of the switching sequence, hereinafter referred to as Transitional portion is referred to and during its duration the mains supply for the cooling unit is switched on continuously remains applied when a person is in the environment of the cooling device is detected.
  • the Transition portion in each case when the sensor output signal is present restarted.
  • a third part of the switching sequence, hereinafter referred to as Initial share is designated and during which the Mains power supply for the cooling unit also switched on continuously remains, then applies if that Refrigerator is turned on and the filled goods, so Drinks etc. first from room temperature to the above Operating temperature of about 5 ° C must be cooled.
  • FIG. 1 shows the basic interconnection of a Power-saving circuit 1 according to the invention with a cooling device 2, for example a minibar.
  • the power saving circuit 1 is a power cord and a power plug 3 on one Mains socket 4 connected.
  • the cooling unit is over the device's own power cord at socket 5 on the power-saving circuit 1 connected.
  • the power saving circuit 1 has via a sensor element 6 for detecting the presence a person in the vicinity of the refrigerator 1.
  • FIG. 2 shows the block diagram of the power saving circuit 1.
  • the mains voltage is fed from the mains plug 3 via the switch contacts of a mains relay 7 to the socket 5 for connecting the cooling device 2.
  • a network fuse (not shown) and / or an overvoltage protection 8 can optionally be present in this path.
  • a control logic 9 is fed by a power supply 10.
  • the sensor element 6 is connected to an evaluation circuit 11, which feeds the processed sensor output signal 12 to the control logic 9.
  • the control logic 9 controls the network relay 7 via a switching stage (not shown) with a switching sequence.
  • adjustable potentiometers 13, 14, 15 are connected to corresponding inputs of the control logic 9. These potentiometers are used to set the on / off ratio V p of a periodic component of the switching sequence, the duration T u of a transition component of the switching sequence and the duration T a of an initial component of the switching sequence.
  • the sensor element 6 is preferably a pyroelectric Infrared detector of a passive infrared detector (PIR).
  • PIR detector known design couple two (detection) criteria together. On the one hand, this is the detection of infrared radiation living body in the spectral range between 7 ⁇ m and 14 ⁇ m, on the other hand the detection of a movement by the Space of the body emitting IR radiation perpendicular to one segmentation of the surveyed space.
  • Sensor element is a sensor output signal that is essentially then exists when there is a person in the area of the sensor element moves.
  • sensor elements can be used for detection the presence of a person also sensor elements are used, which are based on other principles, so for example motion sensors based on the ultrasound principle.
  • the sensor element can also be an outside of the Power-saving circuit arranged element, for example a ground contact via a control input (not shown) is connected to the control logic.
  • a control input can also be potential-free. in the present embodiment with the aforementioned PIR detector one assumes that it is sufficient to move the mentioned Type to detect and that this is normally the Presence of a person can be equated.
  • FIG. 3 shows schematically the intended normal operation a cooling device 2 with a power saving circuit 1, essentially that is, a timing diagram of the control logic 9 generated switching sequence for controlling the mains power supply to the cooling unit and (approximately) the expected Temperature curve in the cooling device.
  • a cooling device or a minibar operated directly from the mains would reach an average cooling temperature of approx. 5 ° C in normal operation with the on / off rhythm given by the cooling device or minibar internal temperature setting.
  • a minibar with an upstream power-saving circuit only achieves an average cooling temperature of approx. 10 ° C due to the additional switching rhythm for the mains power supply, which is superimposed or imposed on the mains input.
  • the Mains power supply released.
  • the mini bar lowers the cooling temperature to the ideally desired 5 ° C without any external influence in the order of about 4 hours (an approximate value determined by tests).
  • the course of the cooling temperature is only shown schematically and in reality will have significantly fewer abrupt transitions.
  • the transition time T u in the power-saving circuit can be set using a potentiometer. The periodic part of the switching sequence is only started when the transition time T u has elapsed.
  • Figure 4 shows schematically the intended initial operation a refrigerator 2 or a minibar with one Power saving circuit, essentially a time diagram the switching sequence for control generated by the control logic 9 the mains supply to the cooling unit, and (approximately) the expected temperature profile in the Refrigerator or in the minibar when starting up the same.
  • the top line of the time diagram also shows schematically here (Yes / no representation) the presence of a person in the environment of the cooling device. It is again assumed that the sensor element 6 used for the entire duration emits a sensor output signal when the person is present. Furthermore, the course shown also assumes that before switching on the minibar, the temperature inside the minibar was about 20 ° C, which is why in this diagram this initial temperature is assumed.
  • a cooling device or minibar operated directly from the mains would reach the average cooling temperature of approx. 5 ° C in about 9.5 to 10 hours with the on / off rhythm given by the cooling device or minibar internal temperature setting. This is also approximately the case with a minibar which is connected via a power-saving circuit according to the invention.
  • a 6-hour start time T a is started in the switching sequence, within which any detections of a person in the vicinity of the minibar remain ineffective (see also event A shown in dashed lines).
  • the 3-hour transition time T u is started, within which any detections of a person in the vicinity of the minibar no longer remain ineffective, but the effect described earlier (see also event B shown in dashed lines; the mains power supply would be released until the transition time T u has elapsed after the person was last detected). If, however, no person is detected in the vicinity of the minibar within 9 hours, the periodic portion of the switching sequence is finally also started here with the passage of the transition time T u . According to the illustration, this always takes place in such a way that the on component becomes effective, which is equivalent to an effective extension of the transition time T u . As a result of the combined times T u and T a it is achieved that the minibar also reaches the desired cooling temperature as quickly as possible at least approximately in this operating case.
  • the initial part of the switching sequence is always one higher switch-on or event priority assigned than that Transition share, and this in turn a higher switch-on or Event priority as the periodic on / off portion. This manifests itself in the fact that during a running start time the transitional portion and the periodic on / off Proportion can be suppressed during an ongoing transition period but only the periodic on / off portion of the Switching sequence.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP97108502A 1997-05-27 1997-05-27 Circuit économiseur pour appareil frigorifique alimenté par secteur et procédé de commande de ce circuit Withdrawn EP0881443A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97108502A EP0881443A1 (fr) 1997-05-27 1997-05-27 Circuit économiseur pour appareil frigorifique alimenté par secteur et procédé de commande de ce circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97108502A EP0881443A1 (fr) 1997-05-27 1997-05-27 Circuit économiseur pour appareil frigorifique alimenté par secteur et procédé de commande de ce circuit

Publications (1)

Publication Number Publication Date
EP0881443A1 true EP0881443A1 (fr) 1998-12-02

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Family Applications (1)

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EP97108502A Withdrawn EP0881443A1 (fr) 1997-05-27 1997-05-27 Circuit économiseur pour appareil frigorifique alimenté par secteur et procédé de commande de ce circuit

Country Status (1)

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EP (1) EP0881443A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000075586A1 (fr) * 1999-06-04 2000-12-14 Arçelik A.Ş. Refrigerateur economique
US7200467B2 (en) 2002-11-08 2007-04-03 Usa Technologies, Inc. Method and apparatus for power management control of a cooling system in a consumer accessible appliance
EP2116801A1 (fr) 2008-05-06 2009-11-11 Indel B S.p.A. Unité de réfrigération et commande correspondante et ensemble de gestion
GB2609950A (en) * 2021-08-18 2023-02-22 Technik2 Ltd Improvements in or relating to energy saving
WO2024008302A1 (fr) * 2022-07-07 2024-01-11 Dometic Sweden Ab Fonctionnement de minibar
US11919363B2 (en) 2017-08-25 2024-03-05 Dometic Sweden Ab Recreational vehicle, cooling device, controlling system and method for controlling the cooling device
EP4435363A1 (fr) * 2023-03-23 2024-09-25 Indel B S.p.A. Système de contrôle et méthode de contrôle d'un réfrigérateur

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101886A (en) * 1977-05-16 1978-07-18 Grimes Johnny C Apparatus for conserving energy in electrical appliances
WO1982001812A1 (fr) 1980-12-01 1982-06-10 Overgaard Bent Procede de fonctionnement d'un comptoir refrigere
EP0062313A2 (fr) * 1981-04-03 1982-10-13 Linde Aktiengesellschaft Réfrigérateur ou congélateur
US4391406A (en) * 1982-01-07 1983-07-05 Morton Fried Power saving system which assures room security
FR2533678A1 (fr) * 1982-09-24 1984-03-30 Thomson Csf Dispositif electronique de commande pour une enceinte frigorifique et enceinte utilisant un tel dispositif
GB2192080A (en) * 1986-06-27 1987-12-31 Surrey County Council Environmental control system eg for heating or lighting
DE3837629A1 (de) * 1988-11-05 1990-05-17 Erwin Dietz Verfahren zur ueberwachung elektrischer kuehlmoebel, insbes. kuehl- oder gefrierschraenke
US5127575A (en) * 1991-04-15 1992-07-07 Beerbaum Ronald H Supervisory control unit for electrical equipment
US5538181A (en) * 1995-05-02 1996-07-23 Simmons; Michael L. Automatic room occupancy controlled fuel savings system for air conditioning/heater units

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101886A (en) * 1977-05-16 1978-07-18 Grimes Johnny C Apparatus for conserving energy in electrical appliances
WO1982001812A1 (fr) 1980-12-01 1982-06-10 Overgaard Bent Procede de fonctionnement d'un comptoir refrigere
EP0062313A2 (fr) * 1981-04-03 1982-10-13 Linde Aktiengesellschaft Réfrigérateur ou congélateur
US4391406A (en) * 1982-01-07 1983-07-05 Morton Fried Power saving system which assures room security
FR2533678A1 (fr) * 1982-09-24 1984-03-30 Thomson Csf Dispositif electronique de commande pour une enceinte frigorifique et enceinte utilisant un tel dispositif
GB2192080A (en) * 1986-06-27 1987-12-31 Surrey County Council Environmental control system eg for heating or lighting
DE3837629A1 (de) * 1988-11-05 1990-05-17 Erwin Dietz Verfahren zur ueberwachung elektrischer kuehlmoebel, insbes. kuehl- oder gefrierschraenke
US5127575A (en) * 1991-04-15 1992-07-07 Beerbaum Ronald H Supervisory control unit for electrical equipment
US5538181A (en) * 1995-05-02 1996-07-23 Simmons; Michael L. Automatic room occupancy controlled fuel savings system for air conditioning/heater units

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000075586A1 (fr) * 1999-06-04 2000-12-14 Arçelik A.Ş. Refrigerateur economique
US7200467B2 (en) 2002-11-08 2007-04-03 Usa Technologies, Inc. Method and apparatus for power management control of a cooling system in a consumer accessible appliance
WO2007046866A1 (fr) * 2005-10-20 2007-04-26 Usa Technologies, Inc. Procede et dispositif de gestion de l'energie du systeme de refroidissement d'un appareil de refrigeration
EP2116801A1 (fr) 2008-05-06 2009-11-11 Indel B S.p.A. Unité de réfrigération et commande correspondante et ensemble de gestion
CN101598481A (zh) * 2008-05-06 2009-12-09 英戴尔比股份公司 制冷单元和相应的控制及管理组件
US8297066B2 (en) 2008-05-06 2012-10-30 Indel B S.P.A. Refrigeration unit and respective control and management assembly
CN101598481B (zh) * 2008-05-06 2013-11-20 英戴尔比股份公司 制冷单元和相应的控制及管理组件
US11919363B2 (en) 2017-08-25 2024-03-05 Dometic Sweden Ab Recreational vehicle, cooling device, controlling system and method for controlling the cooling device
GB2609950A (en) * 2021-08-18 2023-02-22 Technik2 Ltd Improvements in or relating to energy saving
WO2024008302A1 (fr) * 2022-07-07 2024-01-11 Dometic Sweden Ab Fonctionnement de minibar
EP4435363A1 (fr) * 2023-03-23 2024-09-25 Indel B S.p.A. Système de contrôle et méthode de contrôle d'un réfrigérateur

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