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
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2700/00—Means for sensing or measuring; Sensors therefor
  • F25D2700/10—Sensors measuring the temperature of the evaporator
• • 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
  • F25D2700/12—Sensors measuring the inside temperature
• • 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
  • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

• the invention relates to a refrigeration appliance, in particular a domestic refrigeration appliance and a method for cooling a refrigeration appliance, in particular a household refrigeration appliance.
• the temperatures of conventional household appliances can be controlled by means of relatively inexpensive electromechanical thermostats, but only allow a conditionally accurate regulation of the interior temperature of the household refrigerator.
• the electromechanical thermostat can also ensure a regular defrosting of an evaporator of the refrigeration cycle of the household refrigerator.
• Conventional household refrigerators may also have a more complex electronic temperature control / regulation, which makes it possible to set the target temperature of the household refrigeration device relatively precisely.
• These household refrigerators usually have a temperature sensor in the interior.
• the object of the invention is to provide a more energy-efficient method for cooling a household refrigerator.
• the object of the invention is achieved by a method for cooling a cold room of a refrigeration appliance, in particular a domestic refrigeration appliance, comprising in particular by means of a control device of the refrigeration appliance, time-controlled alternately
• Switching off and on of a compressor which has a cooling circuit provided for cooling the cold room, as long as the temperature of the cold room is within a temperature band which is associated with a desired temperature of the cold room and determined by an upper limit temperature and a lower limit temperature.
• a refrigerator in particular a domestic refrigerator, comprising a housing, a heat-insulated inside the housing, a refrigeration circuit for cooling the refrigerating room with a compressor and a control device which is adapted to control the compressor, so that the temperature of the Cold room at least approximately corresponds to a desired temperature of the cold room, and the control device the compressor for cooling the cold room according to the inventive method on and off.
• a refrigeration device that is used for household management, such as a refrigerator, a freezer, a freezer or achengefrierkombination.
• the refrigeration cycle for cooling the refrigerating space to its desired temperature is not by means of a pure temperature control, the controlled variable is substantially the temperature of the refrigeration room, but by the timed alternate switching off and on of the refrigeration cycle, i. whose compressor is held.
• the controlled variable is substantially the temperature of the refrigeration room, but by the timed alternate switching off and on of the refrigeration cycle, i. whose compressor is held.
• the time-controlled alternating switching off and on of the compressor are assigned phases of the compressor in which the compressor is switched on, so-called switch-on phases, and / or in which the compressor is switched off, so-called switch-off phases.
• These assigned switch-on and / or switch-off phases of the compressor can each be the same length. In particular, it may be provided that the switch-on phases are the same length as the switch-off phases. However, it is also possible that the switch-on phases take longer or shorter than the switch-off phases of the compressor. Furthermore, it is also possible to predetermine a time sequence of different long switch-on phases and / or of different long switch-off phases of the compressor. The time-controlled alternating switching off and on of the compressor then follows this predetermined time sequence.
• the length of the switch-on phases and / or the switch-off phases or their chronological sequence is stored in the control device, in particular in a memory unit of the control device.
• the setpoint temperature associated upper limit temperature and lower limit temperature in the control device in particular in a storage unit of the control device, deposited.
• the time-controlled alternating switching off and on of the compressor begins when the temperature of the cold room falls below the upper limit temperature. If the temperature of the cold room is above the upper limit temperature, then the compressor can be switched on continuously until, according to this variant of the method according to the invention, the temperature of the cold room falls below the upper limit temperature. At this time, the timed starting and stopping of the compressor begins, which shortens the average compressor running time and the temperature of the cold room, at least for a certain time moves within the predetermined temperature band.
• Limit temperature falls below.
• This embodiment also makes it possible, if e.g. the temperature of the cold room is too high and the compressor is constantly switched on and thus constantly cools the cold room, the cooling capacity is reduced by the timed switching off and on, to prevent further cooling of the cold room.
• the compressor does not remain off until the upper limit temperature is reached, but is alternately timed off and on.
• the timed alternating switching off and on of the compressor starts with a switch-off phase.
• the compressor is switched off during the time-controlled alternating switching off and on only then and thus remains switched on when the temperature of the cold room for Time of potential shutdown is less than the upper limit temperature.
• the time-controlled alternating switching off and on of the compressor only starts again when the temperature of the cold room falls below the lower limit temperature.
• the temperature of the cold room does not drop too much and that the temperature of the cold room moves substantially within the temperature band defined by the two limit temperatures.
• the compressor is first turned off when the temperature of the cold room falls below the lower limit temperature and the timed alternating switching off and on of the compressor only starts again when the temperature of the cold room exceeds the upper limit temperature.
• the time-controlled alternating switching off and on of the compressor can, according to a variant of the method, only start again when the temperature of the cold room exceeds the lower limit temperature.
• the time-controlled alternating switching off and on of the compressor only starts again when the temperature of the cold room exceeds the upper limit temperature.
• the defrosting phase can start, for example, as soon as the temperature of the evaporator falls below a predetermined limit temperature.
• the method according to the invention or the refrigeration appliance according to the invention provides that the desired temperature in the cold room (nominal temperature) is maintained at relatively low temperature fluctuations and thus lower energy consumption.
• the function can be ensured during operation of the refrigerating appliance according to the invention.
• an electronic control / regulation which optionally realizes a free choice of the switching values (first and second limit temperatures), optionally an implementation of defrosting operations and optionally a degree-accurate adjustment of the cold room temperature.
• a sensor mounted on the evaporator such as the probe capillary of a thermostat, communicates the temperatures at the evaporator, to ensure, if necessary, a complete defrost of the same.
• the predetermined tolerance band which is limited by the corresponding switch-on and switch-off values, corresponding to the lower and upper limit temperatures, it can be ensured that the temperature of the cold room does not become too cold or too warm.
• the chiller (refrigeration circuit or its compressor) runs continuously, as long as the temperature in the cold room is warmer than the upper limit temperature.
• the running times of the chiller are fixed. Compliance with the set temperature (set temperature) is ensured by the idle times of the chiller. Should this not be sufficient to keep the temperature in the cold room within the tolerance band, due to e.g. relatively high ambient temperature, frequent operation of the refrigerator according to the invention or introducing warm goods, so the chiller can again as long put into operation until the desired temperature is reached again.
• the electronics may from time to time initiate defrost phases that completely defrost the evaporator.
• the method according to the invention can be implemented, which enables energy savings. The customer benefit is not affected.
• Fig. 1 is a household refrigerator
• Figures 2-8 are diagrams for illustrating method for cooling the household refrigerator.
• the household refrigerator 1 shows a household refrigerator 1 with a housing 2 and a hinged to the housing 2, for example by means of hinges not shown door leaf 3, which closes a limited by the housing 2 cold room 4 in the closed state and makes accessible in the open state, so that the cold room. 4 loaded with refrigerated goods and thus can be removed from the refrigeration room 4 stored refrigerated goods.
• the household refrigeration appliance 1 can not be shown in detail, however, to those skilled in the art well-known shelves and / or door racks for storage of the refrigerated goods.
• the domestic refrigeration appliance 1 also has a refrigeration circuit 5, which is in principle familiar to the person skilled in the art and is adapted to cool the refrigeration space 4 in accordance with a predefinable setpoint temperature.
• the refrigeration cycle 5 has u.A. a compressor 6 and an evaporator 7, as is well known.
• the temperature T of the cold room 4 is controlled by means of an electronic control device 8, for example, has a microcontroller or a microprocessor and is connected in a manner not shown to the compressor 6 to this for a control or regulation of the temperature T. on and off. 2 illustrates the control / regulation of the temperature T of the refrigerating room 4.
• the household refrigerating appliance 1 has a refrigerating room 4 arranged and connected in a manner not shown with the control device 8 temperature sensor 9.
• the household refrigerating appliance 1 comprises a further temperature sensor 10 connected in a manner not shown to the control device 8, which detects the temperature of the evaporator 7 and transmits a corresponding signal to the control device 8.
• control device 8 is set up to control or regulate the temperature T of the refrigerating chamber 4 by switching the compressor 6 on and off, wherein FIG. 2 shows an example of the course 1 1 of the switch-on phases ⁇ t ⁇ n and the switch-off phases ⁇ t from the compressor 6 and a curve 12 of the temperature T of the refrigerating room 4 shows.
• the control of the temperature T of the refrigerating room 4 is carried out in the case of the present embodiment as follows:
• the control electronics 8 turns on the compressor 6, whereby the refrigeration cycle 5, the cooling room 4 cools and the temperature T. the cold room 4 sinks.
• the control device 8 switches off the compressor 6. Due to the relatively sluggish reaction of the temperature T, the cooling space 4 cools shortly after switching off the compressor 6 at the time ti for a short time and then increases until the temperature T of the cold room 4 reaches the upper limit temperature T 0 at time t 2 or exceeds. When reaching or exceeding the upper limit temperature T 0 at time t 2 , the control device 8 switches on the compressor 6 again. Due to the relatively sluggish reaction of the temperature T of the cold room 4, the cold room 4 is heated after switching on the compressor 6 for a short period of time until the temperature T of the cold room 4 drops again.
• control device 8 switches on the compressor 6 alternately at the times t 3 , t 5 , t 7 , etc., and off again at the times t 4 , t 6 , etc.
• control device 8 generates time-controlled, alternating switch-on phases ⁇ t ⁇ n and switch-off phases ⁇ t from the compressor 6.
• the switch-on phases At em and switch-off phases ⁇ t from the compressor 6 are of equal length. This is not necessarily the case. It is also possible that the switch-on .DELTA.t ⁇ n take longer or shorter than the off phases .DELTA.t from the compressor 6. Furthermore, it is also possible, a time sequence of different long switch-on .DELTA.t ⁇ n and / or of different lengths of switch-off .DELTA.t from specify the compressor 6.
• the switch-on and switch-off phases ⁇ t ⁇ n , ⁇ t from the compressor 6 are time-controlled and not temperature-controlled. So that the cold room 4 holds approximately its desired temperature, it is provided in the case of the present embodiment that when the temperature T of the cold room 4 or the temperature T of the temperature sensor 9 determined temperature T of the cold room 4 at a timed turn-off time t 3 , t 5 , t 7 , etc. is greater than the upper limit temperature T 0 , the control device 8 does not turn off the compressor 6, but leaves it on until the temperature T of the cold room 4 reaches or falls below the lower limit temperature Tu. After falling below the lower limit temperature Tu, the control device 8 switches off the compressor 6 again and starts the timed switching on and off of the compressor 6 as soon as the temperature T of the refrigerating chamber 4 reaches or exceeds the upper limit temperature T 0 .
• the control device 4 switches off the running compressor 6 and starts the timed switching on and off of the compressor 6 as soon as the temperature T of the refrigerating chamber 4 reaches or exceeds the upper limit temperature T 0 again.
• the control device 4 monitors the temperature of the evaporator 7 by means of the temperature sensor 10. If the determined temperature of the evaporator 7 reaches or falls below a predetermined temperature, the control device 8 switches the compressor 6, for example for a predetermined minimum time or until the temperature of the evaporator 7 reaches or exceeds a further predetermined temperature. Thereafter, the control device 8 switches on the compressor 6 again as soon as the temperature T of the cold room 4 reaches or falls below the lower limit temperature Tu and begins the timed switching on and off of the compressor 6 as soon as the temperature T of the cold room 4, the upper limit temperature T 0 again reached or exceeded.
• FIGS. 3 to 5 illustrate an alternative method of cooling the refrigerating space 4, according to which the control device 8 alternately switches the compressor 6 off and on as soon as the temperature T of the refrigerating space 4 drops below the lower limit temperature Tu at the time ti.
• the time-controlled alternating switching on and off of the compressor 6 starts out with an OFF-.DELTA.t, up to the time t from the time ti lasts. 2
• the control device 8 switches on the compressor 6 and a switch-on phase ⁇ t ⁇ n begins, which lasts until time t 3 .
• the control device 8 controls the compressor 6 in a time-controlled manner such that it is alternately turned on and off.
• the control device 8 turns on the compressor 6 upon detection of exceeding the upper limit temperature T 0 during an OFF-.DELTA.t, whereby the temperature T is lowered in the cold room. 4
• the compressor 6 remains turned on until the temperature T of the cold room 4, the lower
• Embodiment at the time t 9 is the case. At the time t 9 the switches
• Control device 8 the compressor 6 again and starts the time-controlled alternate switching off and on of the compressor 6, as long as the temperature T of the cooling chamber 4 is within the temperature range .DELTA.T.
• the control device 8 switches in the case of the present exemplary embodiment compressor 6, even if it is still in an oN .DELTA.t ⁇ n and starts the switched-off .DELTA.t from the time-controlled alternating on and off already at the time t. 8
• Figures 6 to 8 illustrate an alternative method for cooling the cold room 4, according to which the control device 8, the compressor 6 timed alternately off and on as soon as the temperature T of the cold room 4 at time ti falls below the upper limit temperature T 0 .
• the time-controlled alternating switching on and off of the compressor 6 starts out with an OFF-.DELTA.t, up to the time t from the time ti lasts. 2
• the control device 8 switches the
• Compressor 6 on and a switch-on ⁇ t ⁇ n begins, which lasts until the time t 3 .
• the compressor 6 timed to such that it is alternately turned on and off.
• the control device 8 turns on the compressor 6 when detecting the exceeding of the upper limit temperature T 0 , whereby the temperature T in the cold room 4 decreases.
• the compressor 6 remains switched on until the temperature T of the cold room 4 falls below the upper limit temperature T 0 , which is the case in the embodiment shown in FIG. 7 at the time t 7 .
• the control device 8 switches off the compressor 6 again and starts the time-controlled alternating switching off and on of the compressor 6 as long as the temperature T of the refrigerating chamber 4 is within the temperature band ⁇ T.
• the control device 8 switches in the case of the present exemplary embodiment Compressor 6 off, even if it is still in a switch-on .DELTA.t em .
• the time-controlled alternating switching on and off of the compressor 6 does not start until the time t 8 at which the temperature T of the cold room 4 exceeds the upper limit temperature T 0 .
• the time-controlled alternating switching on and off starts here with a switch-on phase ⁇ t ⁇ n .

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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)
• Devices That Are Associated With Refrigeration Equipment (AREA)

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• 2009
  • 2009-03-19 DE DE102009001678A patent/DE102009001678A1/de not_active Withdrawn
• 2010
  • 2010-03-15 WO PCT/EP2010/053251 patent/WO2010106001A2/de active Application Filing
  • 2010-03-15 CN CN2010800127962A patent/CN102356293A/zh active Pending
  • 2010-03-15 RU RU2011139824/13A patent/RU2517224C2/ru not_active IP Right Cessation
  • 2010-03-15 EP EP10708545A patent/EP2409099A2/de not_active Withdrawn

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