EP3243029A1 - A cooling device - Google Patents

A cooling device

Info

Publication number
EP3243029A1
EP3243029A1 EP16700389.6A EP16700389A EP3243029A1 EP 3243029 A1 EP3243029 A1 EP 3243029A1 EP 16700389 A EP16700389 A EP 16700389A EP 3243029 A1 EP3243029 A1 EP 3243029A1
Authority
EP
European Patent Office
Prior art keywords
temperature
fresh food
compartment
freezing compartment
cut
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Withdrawn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
EP16700389.6A
Other languages
German (de)
French (fr)
Inventor
Unsal KAYA
Tolga Nurettin AYNUR
Egemen TINAR
Vasi Kadir Ertis
Erkan KARAKAYA
Erkan BASTAN
Ilyas AYDIN
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP3243029A1 publication Critical patent/EP3243029A1/en
Withdrawn legal-status Critical Current

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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • 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
    • 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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • 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
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • 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
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

Definitions

  • the present invention relates to a cooling device the refrigeration performance of which is improved by controlling the refrigerant circulation.
  • the circulation of the refrigerant fluid through the units composed of the compressor, the condenser, the capillary tube and the evaporator constitutes the refrigeration cycle.
  • the refrigerant fluid alternately circulates the evaporators in both compartments according to the order of connection in the refrigeration cycle. Therefore, problems arise in the control of the cooling temperature and the effectiveness of the evaporators.
  • the refrigerant fluid is directed to one of the compartments by means of a valve. In this case, the refrigerant fluid can be directed to the compartment with increased thermal load; however, if thermal load increases in both compartments, the compartments cannot be simultaneously cooled.
  • the aim of the present invention is the realization of a cooling device wherein the cooling performance is improved by delivering the refrigerant fluid separately or simultaneously to the compartments according to the temperature value measured in the compartments.
  • the cooling device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a fresh food compartment; a freezing compartment; a compressor providing the refrigeration cycle; a condenser that is formed by bending a tube in serpentine form and that enables the refrigerant fluid leaving the compressor as hot vapor to be condensed so as to change into liquid phase; at least one fresh food compartment evaporator that provides the cooling of the fresh food compartment; at least one freezing compartment evaporator that provides the cooling of the freezing compartment; a first temperature sensor that measures the inner temperature of the fresh food compartment; a second temperature sensor that measures the inner temperature of the freezing compartment; a first valve disposed at the condenser outlet; and a control unit that evaluates the data received from the first temperature sensor and the second temperature sensor so as to enable the refrigerant fluid leaving the condenser to pass the first valve to be directed to the fresh food compartment evaporator and/or to the freezing compartment evaporator.
  • the first valve is preferably
  • the cooling device of the present invention comprises - a bypass line that extends from the outlet of the freezing compartment evaporator to the inlet of the fresh food compartment evaporator, - a second valve that is disposed at the inlet of the bypass line and that has two outlets that extend from the freezing compartment evaporator to the bypass line and to the compressor, and - the control unit that evaluates the thermal load of the fresh food compartment according to the data received from the first temperature sensor and the second temperature sensor so as to enable the refrigerant fluid leaving the freezing compartment evaporator to pass through the second valve to be delivered to the bypass line or the compressor.
  • the control unit compares the fresh food compartment temperature detected by the first temperature sensor with the fresh food compartment cut-out temperature predetermined by the producer, and - compares the freezing compartment temperature detected by the second temperature sensor with the freezing compartment cut-out temperature predetermined by the producer. If the inner temperatures of the compartments are above the cut-out temperatures, the control unit provides the delivery of the refrigerant fluid to the relevant evaporator so as to cool the relevant compartment.
  • the compartment with increased thermal load can be detected by evaluating the temperatures of the compartments, and by providing the cooling of the detected compartment, the foodstuffs in the relevant compartment are prevented from spoiling.
  • the control unit if the fresh food compartment temperature is above the fresh food compartment cut-out temperature and the freezing compartment temperature is below the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid to the fresh food compartment evaporator by passing through the first valve.
  • the evaporators are operated in parallel in the refrigeration cycle and the refrigerant fluid is enabled to be directed only to the fresh food compartment evaporator. Thus, only the fresh food compartment is cooled.
  • the control unit when the freezing compartment temperature reaches the freezing compartment cut-in temperature while the refrigerant fluid is being delivered to the fresh food compartment evaporator, the control unit provides the delivery of the refrigerant fluid to the freezing compartment evaporator by passing through the first valve. Thus, the freezing compartment is cooled.
  • the control unit if the freezing compartment temperature is above the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid to the freezing compartment evaporator by passing through the first valve. Thus, the freezing compartment is cooled.
  • the control unit if the fresh food compartment temperature is below the fresh food compartment cut-out temperature and the freezing compartment temperature is above the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator to the compressor by passing through the second valve.
  • the evaporators are operated in parallel in the refrigeration cycle and the refrigerant fluid is enabled to be directed only to the freezing compartment evaporator. Thus, only the freezing compartment is cooled.
  • the control unit compares the fresh food compartment temperature with the fresh food compartment cut-in temperature while the refrigerant fluid is being delivered to the compressor, and when the fresh food compartment temperature reaches the fresh food compartment cut-in temperature - provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator to the bypass line by passing through the second valve if the freezing compartment temperature is above the freezing compartment cut-out temperature, and - provides the delivery of the refrigerant fluid to the freezing compartment evaporator by passing through the first valve if the freezing compartment temperature is below the freezing compartment cut-out temperature. If the thermal load of the fresh food compartment increases while the refrigerant fluid is being delivered only to the freezing compartment, the control unit evaluates the thermal load of the freezing compartment.
  • the control unit operates the evaporators in serial in the refrigerant cycle by delivering the refrigerant fluid first to the freezing compartment, then from the freezing compartment to the fresh food compartment by means of the bypass line. If the thermal load of the freezing compartment is low, the control unit operates the evaporators in parallel in the refrigeration cycle by delivering the refrigerant fluid to the fresh food compartment by passing through the first valve, thus providing the cooling of only the fresh food compartment.
  • the control unit if the fresh food compartment temperature is above the fresh food compartment cut-out temperature and the freezing compartment temperature is above the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator to the bypass line by passing through the second valve.
  • the evaporators in the refrigeration cycle are operated in serial and the cooling needs of both compartments can be met simultaneously.
  • the control unit while operating the evaporators in the refrigeration cycle in serial, the control unit - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator by passing through the first valve if the freezing compartment temperature falls below the freezing compartment cut-out temperature, - provides the delivery of the refrigerant fluid to the compressor by passing through the second valve if the fresh food compartment temperature falls below the fresh food compartment cut-out temperature, and - provides the termination of the delivery of the refrigerant fluid by stopping the compressor if the fresh food compartment temperature falls below the fresh food compartment cut-out temperature and the freezing compartment temperature falls below the freezing compartment cut-out temperature.
  • the control unit when the cooling needs of one of the compartments are met, changes the evaporators in the refrigeration cycle from serially connected to parallelly connected so as to provide the cooling of only the compartment the thermal load of which has not been compensated.
  • the control unit if the fresh food compartment temperature is below the fresh food compartment cut-out temperature and the freezing compartment temperature is below the freezing compartment cut-out temperature, the control unit provides the termination of the delivery of the refrigerant fluid by stopping the compressor. In case the fresh food compartment and the freezing compartment are sufficiently cooled, the control prevents unnecessary energy consumption by terminating the refrigeration cycle.
  • a cooling device with improved refrigeration cycle performance is realized by delivering the refrigerant fluid to the fresh food compartment evaporator and the freezing compartment evaporator sequentially or separately by evaluating the inner temperatures of the compartments.
  • the refrigerant fluid is delivered to the fresh food compartment evaporator
  • the freezing compartment is required to be cooled
  • the refrigerant fluid is delivered to the freezing compartment evaporator.
  • the refrigerant fluid is delivered first to the freezing compartment evaporator and afterwards from the freezing compartment evaporator to the fresh food compartment evaporator.
  • Figure 1 – is the schematic view of a cooling device.
  • Figure 2 – is the schematic view of a refrigeration cycle.
  • the cooling device (1) comprises a fresh food compartment (2) wherein the foodstuffs are placed to be cooled; a freezing compartment (3) that is kept at lower temperatures than the fresh food compartment (2) and wherein the foodstuffs are placed to be frozen; a compressor (4) that provides the compression of the refrigerant fluid; a condenser (5) that enables the refrigerant fluid leaving the compressor (4) to be condensed and thus to change into liquid phase; at least one fresh food compartment evaporator (6) that provides the cooling of the fresh food compartment (2) by performing heat transfer between the refrigerant fluid and the environment; at least one freezing compartment evaporator (7) that provides the cooling of the freezing compartment (3) by performing heat transfer between the refrigerant fluid and the environment; a first temperature sensor (8) that measures the temperature of the fresh food compartment (2) for controlling the cooling process; a second temperature sensor (9) that measures the temperature of the freezing compartment (3) for controlling the freezing process; a first valve (10) that is disposed at the outlet of the condenser (5), and a control unit (11)
  • the cooling device (1) of the present invention comprises - a bypass line (12) that is disposed between the freezing compartment evaporator (7) and the fresh food compartment evaporator (6), - a second valve (13) that is disposed at the inlet of the bypass line (12), and - the control unit (11) that enables the refrigerant fluid leaving the freezing compartment evaporator (7) to pass through the second valve (13) to be delivered to the bypass line (12) or the compressor (4) according to the data received from the first temperature sensor (8) and the second temperature sensor (9) ( Figure 1 and Figure 2).
  • the control unit (11) determines the compartment the thermal load of which has increased by evaluating the data received from the first temperature sensor (8) and the second temperature sensor (9) and provides the delivery of the refrigerant fluid leaving the condenser (5) to be directed to the fresh food compartment evaporator (6) and/or the freezing compartment evaporator (7) by passing through the first valve (10) so as to be directed to the detected compartment).
  • the control unit (11) provides the delivery of the refrigerant fluid first to the freezing compartment evaporator (7), then provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) from the freezing compartment evaporator (7) to the bypass line (12) connected to the fresh food compartment (6).
  • the fresh food compartment (2) and the freezing compartment (3) are simultaneously cooled.
  • control unit (11) compares the fresh food compartment (2) temperature (T FF ) detected by the first temperature sensor (8) with the fresh food compartment (2) cut-out temperature (T FFcut-out ) predetermined by the producer, and - compares the freezing compartment (3) temperature (T FRZ ) detected by the second temperature sensor (9) with the freezing compartment (3) cut-out temperature (T FRZcut-out ) predetermined by the producer.
  • the control unit (11) determines that the fresh food compartment (2) is required to be cooled, and if the freezing compartment (3) temperature (T FRZ ) is above the freezing compartment (3) cut-out temperature (T FRZcut-out ), the control unit (11) determines that the freezing compartment (3) is required to be cooled.
  • the control unit (11) if the fresh food compartment (2) temperature (T FF ) is above the fresh food compartment (2) cut-out temperature (T FFcut-out ) and the freezing compartment (3) temperature (T FRZ ) is below the freezing compartment (3) cut-out temperature (T FRZcut-out ), the control unit (11) provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10).
  • the control unit (11) determines that the thermal load of the fresh food compartment (2) has increased, and since the freezing compartment (3) is not required to be cooled if the freezing compartment (3) temperature (T FRZ ) is below the freezing compartment (3) cut-out temperature (T FRZcut-out ), the control unit (11) provides the delivery of the refrigerant fluid to be fresh food compartment evaporator (6) in order to enable the cooling of only the fresh food compartment (2) with increased thermal load.
  • the control unit (11) compares the freezing compartment (3) temperature (T FRZ ) detected by the second temperature sensor (9) with the freezing compartment (3) cut-in temperature (T FRZcut-in ) predetermined by the producer while the refrigerant fluid is being delivered to the fresh food compartment evaporator (6), and when the freezing compartment (3) temperature (T FRZ ) reaches the freezing compartment (3) cut-in temperature (T FRZcut-in ), the control unit (11) provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) by passing through the first valve (10).
  • the control unit (11) determines that the thermal load of the freezing compartment (3) has increased when the freezing compartment (3) temperature (T FRZ ) has reached the freezing compartment (3) cut-in temperature (T FRZcut-in ) and provides the cooling of the freezing compartment (3) by directing the refrigerant fluid to the freezing compartment evaporator (7).
  • the freezing compartment (3) is enabled to be operated at temperatures between the freezing compartment (3) cut-in temperature (T FRZcut-in ) and the freezing compartment cut-out temperature (T FRZcut-out ).
  • the control unit (11) determines that the thermal load of the freezing compartment (3) has increased if the freezing compartment (3) temperature (T FRZ ) is above the freezing compartment (3) cut-out temperature (T FRZcut-out ) and provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) so as to enable the cooling of the freezing compartment (3).
  • the control unit (11) if the fresh food compartment (2) temperature (T FF ) is below the fresh food compartment (2) cut-out temperature (T FFcut-out ) and the freezing compartment (3) temperature (T FRZ ) is above the freezing compartment (3) cut-out temperature (T FRZcut-out ), the control unit (11) provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the compressor (4) by passing through the second valve (13).
  • the control unit (11) determines that the fresh food compartment (2) is not required to be cooled and provides the delivery of the refrigerant fluid to the compressor (4).
  • the control unit (11) compares the fresh food compartment (2) temperature (T FF ) detected by the first temperature sensor (8) with the fresh food compartment (2) cut-in temperature (T FFcut-in ) predetermined by the producer while the refrigerant fluid is being delivered to the compressor (4), and when the fresh food compartment (2) temperature (T FF ) reaches the fresh food compartment (2) cut-in temperature (T FFcut-in ), the control unit (11) - provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the bypass line (12) by passing through the second valve (13) if the freezing compartment (3) temperature (T FRZ ) is above the freezing compartment (3) cut-out temperature (T FRZcut-out ), and - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10) if the freezing compartment (3) temperature (T FRZ ) is below the freezing compartment (3) cut-out temperature (T FRZcut-out ).
  • the control unit (11) determines that the thermal load of the fresh food compartment (2) has increased when the fresh food compartment (2) temperature (T FF ) has reached the fresh food compartment (2) cut-in temperature (T FFcut-in ).
  • the control unit (11) determines the thermal load of the freezing compartment (3) by comparing the freezing compartment (3) temperature (T FRZ ) with the freezing compartment (3) cut-out temperature (T FRZcut-out ), and if the thermal load of the freezing compartment (3) is high, provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the fresh food compartment evaporator (6), and if the thermal load of the freezing compartment (3) is low, provides the delivery of the refrigerant fluid leaving the condenser (5) to the fresh food compartment evaporator (6).
  • the freezing compartment (3) is enabled to be operated at temperatures between the freezing compartment (3) cut-in temperature (T FRZcut-in ) and the freezing compartment cut-out temperature (T FRZcut-out ), and the fresh food compartment (2) is enabled to be operated at temperatures between the fresh food compartment (2) cut-in temperature (T FFcut-in ) and the fresh food compartment cut-out temperature (T FFcut-out ).
  • the control unit (11) if the fresh food compartment (2) temperature (T FF ) is above the fresh food compartment (2) cut-out temperature (T FFcut-out ) and the freezing compartment (3) temperature (T FRZ ) is above the freezing compartment (3) cut-out temperature (T FRZcut-out ), the control unit (11) provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the bypass line (12) by passing through the second valve (13).
  • the control unit (11) directs the refrigerant fluid leaving the condenser (5) first to the freezing compartment evaporator (7), and then provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the fresh food compartment evaporator (6).
  • the control unit (11) enables the freezing compartment evaporator (7) and the fresh food compartment evaporator (6) to be operated in serial, thus providing the simultaneous cooling of both compartments (2, 3).
  • T FF fresh food compartment (2) temperature
  • T FFcut-out fresh food compartment (2) cut-out temperature
  • T FRZ freezing compartment (3) temperature
  • the control unit (11) if the fresh food compartment (2) temperature (T FF ) is below the fresh food compartment (2) cut-out temperature (T FFcut-out ) and the freezing compartment (3) temperature (T FRZ ) is below the freezing compartment (3) cut-out temperature (T FRZcut-out ), the control unit (11) provides the termination of the delivery of the refrigerant fluid by stopping the compressor (4). In this case, the control unit (11) decides that the fresh food compartment (2) and the freezing compartment (3) are not required to be cooled, thus terminates the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) and the freezing compartment evaporator (7).
  • the cooling need is determined by detecting the inner temperatures of the fresh food compartment (2) and the freezing compartment (3), and the fresh food compartment (2) and the freezing compartment (3) are enabled to be cooled separately or simultaneously by operating the freezing compartment evaporator (7) and the fresh food compartment evaporator (6) in serial or in parallel in the refrigeration cycle by means of the bypass line (12) disposed between the freezing compartment evaporator (7) and the fresh food compartment evaporator (6).

Abstract

The present invention relates to a cooling device (1) comprising a fresh food compartment (2) wherein the foodstuffs are placed to be cooled; a freezing compartment (3) that is kept at lower temperatures than the fresh food compartment (2) and wherein the foodstuffs are placed to be frozen; a compressor (4) that provides the compression of the refrigerant fluid; a condenser (5) that enables the refrigerant fluid leaving the compressor (3) to be condensed and thus to change into liquid phase; at least one fresh food compartment evaporator (6) that provides the cooling of the fresh food compartment (2) by performing heat transfer between the refrigerant fluid and the environment; at least one freezing compartment evaporator (7) that provides the cooling of the freezing compartment (3) by performing heat transfer between the refrigerant fluid and the environment; a first temperature sensor (8) that measures the temperature of the fresh food compartment for controlling the cooling process; and a second temperature sensor (9) that measures the temperature of the freezing compartment (3) for controlling the freezing process, wherein - a bypass line (12) that is disposed between the freezing compartment evaporator (7) and the fresh food compartment evaporator (6), - a second valve (13) that is disposed at the inlet of the bypass line (12), and - the control unit (11) that enables the refrigerant fluid leaving the freezing compartment evaporator (7) to pass through the second valve (13) to be delivered to the bypass line (12) or the compressor (4) according to the data received from the first temperature sensor (8) and the second temperature sensor (9).

Description

    A COOLING DEVICE
  • The present invention relates to a cooling device the refrigeration performance of which is improved by controlling the refrigerant circulation.
  • In cooling devices, the circulation of the refrigerant fluid through the units composed of the compressor, the condenser, the capillary tube and the evaporator constitutes the refrigeration cycle. Especially, in cooling devices composed of fresh food and freezer compartments, wherein serially connected evaporators are provided in both compartments, the refrigerant fluid alternately circulates the evaporators in both compartments according to the order of connection in the refrigeration cycle. Therefore, problems arise in the control of the cooling temperature and the effectiveness of the evaporators. In cooling systems with serially connected evaporators, in case of sudden thermal load in the compartments wherein the evaporators are provided, if the evaporator of the compartment wherein the thermal load has increased is the last in the flow direction of the refrigeration cycle, the said evaporator cannot response to the sudden thermal load quickly. Moreover, since the refrigerant flow through the evaporators in the cooling systems with serially connected evaporators is constant, the temperatures of the compartments cannot be independently controlled, therefore, the compartment should be cooled together with the other compartment with increased thermal load. In cooling devices wherein parallelly connected evaporators are provided in both compartments, the refrigerant fluid is directed to one of the compartments by means of a valve. In this case, the refrigerant fluid can be directed to the compartment with increased thermal load; however, if thermal load increases in both compartments, the compartments cannot be simultaneously cooled.
  • In the state of the art United States Patent Application No. US2010095691A1, a cooling device is disclosed, wherein parallelly connected evaporators are provided in the freezing room and the refrigeration room and wherein the refrigerant is directed to the compartment with increased thermal load.
  • In the state of the art European Patent Application No. EP1376031A2, a cooling device is disclosed, wherein parallelly connected evaporators are provided in the freezing chamber and the refrigerating chamber and wherein the refrigerant is directed to the compartments according to the temperature values measured in the compartments.
  • The aim of the present invention is the realization of a cooling device wherein the cooling performance is improved by delivering the refrigerant fluid separately or simultaneously to the compartments according to the temperature value measured in the compartments.
  • The cooling device realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a fresh food compartment; a freezing compartment; a compressor providing the refrigeration cycle; a condenser that is formed by bending a tube in serpentine form and that enables the refrigerant fluid leaving the compressor as hot vapor to be condensed so as to change into liquid phase; at least one fresh food compartment evaporator that provides the cooling of the fresh food compartment; at least one freezing compartment evaporator that provides the cooling of the freezing compartment; a first temperature sensor that measures the inner temperature of the fresh food compartment; a second temperature sensor that measures the inner temperature of the freezing compartment; a first valve disposed at the condenser outlet; and a control unit that evaluates the data received from the first temperature sensor and the second temperature sensor so as to enable the refrigerant fluid leaving the condenser to pass the first valve to be directed to the fresh food compartment evaporator and/or to the freezing compartment evaporator. The first valve is preferably a three-way solenoid valve.
  • The cooling device of the present invention comprises
    - a bypass line that extends from the outlet of the freezing compartment evaporator to the inlet of the fresh food compartment evaporator,
    - a second valve that is disposed at the inlet of the bypass line and that has two outlets that extend from the freezing compartment evaporator to the bypass line and to the compressor, and
    - the control unit that evaluates the thermal load of the fresh food compartment according to the data received from the first temperature sensor and the second temperature sensor so as to enable the refrigerant fluid leaving the freezing compartment evaporator to pass through the second valve to be delivered to the bypass line or the compressor.
  • In an embodiment of the present invention, the control unit
    - compares the fresh food compartment temperature detected by the first temperature sensor with the fresh food compartment cut-out temperature predetermined by the producer, and
    - compares the freezing compartment temperature detected by the second temperature sensor with the freezing compartment cut-out temperature predetermined by the producer. If the inner temperatures of the compartments are above the cut-out temperatures, the control unit provides the delivery of the refrigerant fluid to the relevant evaporator so as to cool the relevant compartment. Thus, the compartment with increased thermal load can be detected by evaluating the temperatures of the compartments, and by providing the cooling of the detected compartment, the foodstuffs in the relevant compartment are prevented from spoiling.
  • In another embodiment of the present invention, if the fresh food compartment temperature is above the fresh food compartment cut-out temperature and the freezing compartment temperature is below the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid to the fresh food compartment evaporator by passing through the first valve. In the case only the fresh food compartment is required to be cooled, the evaporators are operated in parallel in the refrigeration cycle and the refrigerant fluid is enabled to be directed only to the fresh food compartment evaporator. Thus, only the fresh food compartment is cooled.
  • In another embodiment of the present invention, when the freezing compartment temperature reaches the freezing compartment cut-in temperature while the refrigerant fluid is being delivered to the fresh food compartment evaporator, the control unit provides the delivery of the refrigerant fluid to the freezing compartment evaporator by passing through the first valve. Thus, the freezing compartment is cooled.
  • In another embodiment of the present invention, if the freezing compartment temperature is above the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid to the freezing compartment evaporator by passing through the first valve. Thus, the freezing compartment is cooled.
  • In another embodiment of the present invention, if the fresh food compartment temperature is below the fresh food compartment cut-out temperature and the freezing compartment temperature is above the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator to the compressor by passing through the second valve. In the case only the freezing compartment is required to be cooled, the evaporators are operated in parallel in the refrigeration cycle and the refrigerant fluid is enabled to be directed only to the freezing compartment evaporator. Thus, only the freezing compartment is cooled.
  • In another embodiment of the present invention, the control unit compares the fresh food compartment temperature with the fresh food compartment cut-in temperature while the refrigerant fluid is being delivered to the compressor, and when the fresh food compartment temperature reaches the fresh food compartment cut-in temperature
    - provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator to the bypass line by passing through the second valve if the freezing compartment temperature is above the freezing compartment cut-out temperature, and
    - provides the delivery of the refrigerant fluid to the freezing compartment evaporator by passing through the first valve if the freezing compartment temperature is below the freezing compartment cut-out temperature. If the thermal load of the fresh food compartment increases while the refrigerant fluid is being delivered only to the freezing compartment, the control unit evaluates the thermal load of the freezing compartment. If the thermal load of the freezing compartment is high, then the control unit operates the evaporators in serial in the refrigerant cycle by delivering the refrigerant fluid first to the freezing compartment, then from the freezing compartment to the fresh food compartment by means of the bypass line. If the thermal load of the freezing compartment is low, the control unit operates the evaporators in parallel in the refrigeration cycle by delivering the refrigerant fluid to the fresh food compartment by passing through the first valve, thus providing the cooling of only the fresh food compartment.
  • In another embodiment of the present invention, if the fresh food compartment temperature is above the fresh food compartment cut-out temperature and the freezing compartment temperature is above the freezing compartment cut-out temperature, the control unit provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator to the bypass line by passing through the second valve. Thus, the evaporators in the refrigeration cycle are operated in serial and the cooling needs of both compartments can be met simultaneously.
  • In another embodiment of the present invention, while operating the evaporators in the refrigeration cycle in serial, the control unit
    - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator by passing through the first valve if the freezing compartment temperature falls below the freezing compartment cut-out temperature,
    - provides the delivery of the refrigerant fluid to the compressor by passing through the second valve if the fresh food compartment temperature falls below the fresh food compartment cut-out temperature, and
    - provides the termination of the delivery of the refrigerant fluid by stopping the compressor if the fresh food compartment temperature falls below the fresh food compartment cut-out temperature and the freezing compartment temperature falls below the freezing compartment cut-out temperature. Thus, while the fresh food compartment and the freezing compartment are simultaneously cooled, the control unit, when the cooling needs of one of the compartments are met, changes the evaporators in the refrigeration cycle from serially connected to parallelly connected so as to provide the cooling of only the compartment the thermal load of which has not been compensated.
  • In another embodiment of the present invention, if the fresh food compartment temperature is below the fresh food compartment cut-out temperature and the freezing compartment temperature is below the freezing compartment cut-out temperature, the control unit provides the termination of the delivery of the refrigerant fluid by stopping the compressor. In case the fresh food compartment and the freezing compartment are sufficiently cooled, the control prevents unnecessary energy consumption by terminating the refrigeration cycle.
  • By means of the present invention, a cooling device with improved refrigeration cycle performance is realized by delivering the refrigerant fluid to the fresh food compartment evaporator and the freezing compartment evaporator sequentially or separately by evaluating the inner temperatures of the compartments. When only the fresh food compartment is required to be cooled, the refrigerant fluid is delivered to the fresh food compartment evaporator, and when the freezing compartment is required to be cooled, the refrigerant fluid is delivered to the freezing compartment evaporator. In case both the fresh food compartment and the freezing compartment are required to be cooled, the refrigerant fluid is delivered first to the freezing compartment evaporator and afterwards from the freezing compartment evaporator to the fresh food compartment evaporator.
  • The cooling device realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
  • Figure 1 – is the schematic view of a cooling device.
  • Figure 2 – is the schematic view of a refrigeration cycle.
  • The elements illustrated in the figures are numbered as follows:
    1. Cooling device
    2. Fresh food compartment
    3. Freezing compartment
    4. Compressor
    5. Condenser
    6. Fresh food compartment evaporator
    7. Freezing compartment evaporator
    8. First temperature sensor
    9. Second temperature sensor
    10. First valve
    11. Control unit
    12. Bypass line
    13. Second valve
  • The cooling device (1) comprises a fresh food compartment (2) wherein the foodstuffs are placed to be cooled; a freezing compartment (3) that is kept at lower temperatures than the fresh food compartment (2) and wherein the foodstuffs are placed to be frozen; a compressor (4) that provides the compression of the refrigerant fluid; a condenser (5) that enables the refrigerant fluid leaving the compressor (4) to be condensed and thus to change into liquid phase; at least one fresh food compartment evaporator (6) that provides the cooling of the fresh food compartment (2) by performing heat transfer between the refrigerant fluid and the environment; at least one freezing compartment evaporator (7) that provides the cooling of the freezing compartment (3) by performing heat transfer between the refrigerant fluid and the environment; a first temperature sensor (8) that measures the temperature of the fresh food compartment (2) for controlling the cooling process; a second temperature sensor (9) that measures the temperature of the freezing compartment (3) for controlling the freezing process; a first valve (10) that is disposed at the outlet of the condenser (5), and a control unit (11) that provides the delivery of the refrigerant fluid leaving the condenser (5) to the fresh food compartment evaporator (6) or to the freezing compartment evaporator (7) by passing through the first valve (10) upon evaluating the data received from the first temperature sensor (8) and the second temperature sensor (9).
  • The cooling device (1) of the present invention comprises
    - a bypass line (12) that is disposed between the freezing compartment evaporator (7) and the fresh food compartment evaporator (6),
    - a second valve (13) that is disposed at the inlet of the bypass line (12), and
    - the control unit (11) that enables the refrigerant fluid leaving the freezing compartment evaporator (7) to pass through the second valve (13) to be delivered to the bypass line (12) or the compressor (4) according to the data received from the first temperature sensor (8) and the second temperature sensor (9) (Figure 1 and Figure 2).
  • The control unit (11) determines the compartment the thermal load of which has increased by evaluating the data received from the first temperature sensor (8) and the second temperature sensor (9) and provides the delivery of the refrigerant fluid leaving the condenser (5) to be directed to the fresh food compartment evaporator (6) and/or the freezing compartment evaporator (7) by passing through the first valve (10) so as to be directed to the detected compartment). In case the thermal loads of both the fresh food compartment (2) and the freezing compartment (3) increase, the control unit (11) provides the delivery of the refrigerant fluid first to the freezing compartment evaporator (7), then provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) from the freezing compartment evaporator (7) to the bypass line (12) connected to the fresh food compartment (6). Thus, the fresh food compartment (2) and the freezing compartment (3) are simultaneously cooled.
  • In an embodiment of the present invention, the control unit (11)
    - compares the fresh food compartment (2) temperature (TFF) detected by the first temperature sensor (8) with the fresh food compartment (2) cut-out temperature (TFFcut-out) predetermined by the producer, and
    - compares the freezing compartment (3) temperature (TFRZ) detected by the second temperature sensor (9) with the freezing compartment (3) cut-out temperature (TFRZcut-out) predetermined by the producer. If the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out), the control unit (11) determines that the fresh food compartment (2) is required to be cooled, and if the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) determines that the freezing compartment (3) is required to be cooled.
  • In another embodiment of the present invention, if the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10). If the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out), the control unit (11) determines that the thermal load of the fresh food compartment (2) has increased, and since the freezing compartment (3) is not required to be cooled if the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) provides the delivery of the refrigerant fluid to be fresh food compartment evaporator (6) in order to enable the cooling of only the fresh food compartment (2) with increased thermal load.
  • In another embodiment of the present invention, the control unit (11) compares the freezing compartment (3) temperature (TFRZ) detected by the second temperature sensor (9) with the freezing compartment (3) cut-in temperature (TFRZcut-in) predetermined by the producer while the refrigerant fluid is being delivered to the fresh food compartment evaporator (6), and when the freezing compartment (3) temperature (TFRZ) reaches the freezing compartment (3) cut-in temperature (TFRZcut-in), the control unit (11) provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) by passing through the first valve (10). The control unit (11) determines that the thermal load of the freezing compartment (3) has increased when the freezing compartment (3) temperature (TFRZ) has reached the freezing compartment (3) cut-in temperature (TFRZcut-in) and provides the cooling of the freezing compartment (3) by directing the refrigerant fluid to the freezing compartment evaporator (7). Thus, the freezing compartment (3) is enabled to be operated at temperatures between the freezing compartment (3) cut-in temperature (TFRZcut-in) and the freezing compartment cut-out temperature (TFRZcut-out).
  • In another embodiment of the present invention, if the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) by passing through the first valve (10). The control unit (11) determines that the thermal load of the freezing compartment (3) has increased if the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out) and provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) so as to enable the cooling of the freezing compartment (3).
  • In another embodiment of the present invention, if the fresh food compartment (2) temperature (TFF) is below the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the compressor (4) by passing through the second valve (13). If the fresh food compartment (2) temperature (TFF) is below the fresh food compartment (2) cut-out temperature (TFFcut-out) while the refrigerant fluid is being delivered to the freezing compartment (3), the control unit (11) determines that the fresh food compartment (2) is not required to be cooled and provides the delivery of the refrigerant fluid to the compressor (4).
  • In another embodiment of the present invention, the control unit (11) compares the fresh food compartment (2) temperature (TFF) detected by the first temperature sensor (8) with the fresh food compartment (2) cut-in temperature (TFFcut-in) predetermined by the producer while the refrigerant fluid is being delivered to the compressor (4), and when the fresh food compartment (2) temperature (TFF) reaches the fresh food compartment (2) cut-in temperature (TFFcut-in), the control unit (11)
    - provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the bypass line (12) by passing through the second valve (13) if the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), and
    - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10) if the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out). The control unit (11) determines that the thermal load of the fresh food compartment (2) has increased when the fresh food compartment (2) temperature (TFF) has reached the fresh food compartment (2) cut-in temperature (TFFcut-in). The control unit (11) determines the thermal load of the freezing compartment (3) by comparing the freezing compartment (3) temperature (TFRZ) with the freezing compartment (3) cut-out temperature (TFRZcut-out), and if the thermal load of the freezing compartment (3) is high, provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the fresh food compartment evaporator (6), and if the thermal load of the freezing compartment (3) is low, provides the delivery of the refrigerant fluid leaving the condenser (5) to the fresh food compartment evaporator (6). Thus, the freezing compartment (3) is enabled to be operated at temperatures between the freezing compartment (3) cut-in temperature (TFRZcut-in) and the freezing compartment cut-out temperature (TFRZcut-out), and the fresh food compartment (2) is enabled to be operated at temperatures between the fresh food compartment (2) cut-in temperature (TFFcut-in) and the fresh food compartment cut-out temperature (TFFcut-out).
  • In another embodiment of the present invention, if the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the bypass line (12) by passing through the second valve (13). When both the fresh food compartment (2) and the freezing compartment (3) are required to be cooled, the control unit (11) directs the refrigerant fluid leaving the condenser (5) first to the freezing compartment evaporator (7), and then provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the fresh food compartment evaporator (6). Thus, the control unit (11) enables the freezing compartment evaporator (7) and the fresh food compartment evaporator (6) to be operated in serial, thus providing the simultaneous cooling of both compartments (2, 3).
  • In another embodiment of the present invention, the control unit (11), while the refrigerant fluid is being delivered to the bypass line (12),
    - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10) if the freezing compartment (3) temperature (TFRZ) falls below the freezing compartment (3) cut-out temperature (TFRZcut-out) when the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out),
    - provides the delivery of the refrigerant fluid to the compressor (4) by passing through the second valve (13) if the fresh food compartment (2) temperature (TFF) falls below the fresh food compartment (2) cut-out temperature (TFFcut-out) when the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), and
  • - provides the termination of the delivery of the refrigerant fluid by stopping the compressor (4) if the fresh food compartment (2) temperature (TFF) falls below the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) falls below the freezing compartment (3) cut-out temperature (TFRZcut-out).
  • In another embodiment of the present invention, if the fresh food compartment (2) temperature (TFF) is below the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out), the control unit (11) provides the termination of the delivery of the refrigerant fluid by stopping the compressor (4). In this case, the control unit (11) decides that the fresh food compartment (2) and the freezing compartment (3) are not required to be cooled, thus terminates the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) and the freezing compartment evaporator (7).
  • In the cooling device (1) of the present invention, the cooling need is determined by detecting the inner temperatures of the fresh food compartment (2) and the freezing compartment (3), and the fresh food compartment (2) and the freezing compartment (3) are enabled to be cooled separately or simultaneously by operating the freezing compartment evaporator (7) and the fresh food compartment evaporator (6) in serial or in parallel in the refrigeration cycle by means of the bypass line (12) disposed between the freezing compartment evaporator (7) and the fresh food compartment evaporator (6).

Claims (10)

  1. A cooling device (1) comprising a fresh food compartment (2) wherein the foodstuffs are placed to be cooled; a freezing compartment (3) that is kept at lower temperatures than the fresh food compartment (2) and wherein the foodstuffs are placed to be frozen; a compressor (4) that provides the compression of the refrigerant fluid; a condenser (5) that enables the refrigerant fluid leaving the compressor (4) to be condensed and thus to change into liquid phase; at least one fresh food compartment evaporator (6) that provides the cooling of the fresh food compartment (2) by performing heat transfer between the refrigerant fluid and the environment; at least one freezing compartment evaporator (7) that provides the cooling of the freezing compartment (3) by performing heat transfer between the refrigerant fluid and the environment; a first temperature sensor (8) that measures the temperature of the fresh food compartment (2) for controlling the cooling process; a second temperature sensor (9) that measures the temperature of the freezing compartment (3) for controlling the freezing process; a first valve (10) that is disposed at the outlet of the condenser (5), and a control unit (11) that provides the delivery of the refrigerant fluid leaving the condenser (5) to the fresh food compartment evaporator (6) or to the freezing compartment evaporator (7) by passing through the first valve (10) upon evaluating the data received from the first temperature sensor (8) and the second temperature sensor (9), characterized by
    - a bypass line (12) that is disposed between the freezing compartment evaporator (7) and the fresh food compartment evaporator (6),
    - a second valve (13) that is disposed at the inlet of the bypass line (12), and
    - the control unit (11) that enables the refrigerant fluid leaving the freezing compartment evaporator (7) to pass through the second valve (13) to be delivered to the bypass line (12) or the compressor (4) according to the data received from the first temperature sensor (8) and the second temperature sensor (9).
  2. A cooling device (1) as in Claim 1, characterized by the control unit (11)
    - that compares the fresh food compartment (2) temperature (TFF) detected by the first temperature sensor (8) with the fresh food compartment (2) cut-out temperature (TFFcut-out) predetermined by the producer, and
    - that compares the freezing compartment (3) temperature (TFRZ) detected by the second temperature sensor (9) with the freezing compartment (3) cut-out temperature (TFRZcut-out) predetermined by the producer.
  3. A cooling device (1) as in Claim 2, characterized by the control unit (11) that provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10) if the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out).
  4. A cooling device (1) as in Claim 3, characterized by the control unit (11) that compares the freezing compartment (3) temperature (TFRZ) detected by the second temperature sensor (9) with the freezing compartment (3) cut-in temperature (TFRZcut-in) predetermined by the producer while the refrigerant fluid is being delivered to the fresh food compartment evaporator (6), and that provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) by passing through the first valve (10) when the freezing compartment (3) temperature (TFRZ) reaches the freezing compartment (3) cut-in temperature (TFRZcut-in).
  5. A cooling device (1) as in Claim 2, characterized by the control unit (11) that provides the delivery of the refrigerant fluid to the freezing compartment evaporator (7) by passing through the first valve (10) if the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out).
  6. A cooling device (1) as in Claim 5, characterized by the control unit (11) that provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the compressor (4) by passing through the second valve (13) if the fresh food compartment (2) temperature (TFF) is below the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out).
  7. A cooling device (1) as in Claim 6, characterized by the control unit (11) that compares the fresh food compartment (2) temperature (TFF) detected by the first temperature sensor (8) with the fresh food compartment (2) cut-in temperature (TFFcut-in) predetermined by the producer while the refrigerant fluid is being delivered to the compressor (4), and that, when the fresh food compartment (2) temperature (TFF) reaches the fresh food compartment (2) cut-in temperature (TFFcut-in),
    - provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the bypass line (12) by passing through the second valve (13) if the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), and
    - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10) if the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out).
  8. A cooling device (1) as in Claim 2, characterized by the control unit (11) that provides the delivery of the refrigerant fluid leaving the freezing compartment evaporator (7) to the bypass line (12) by passing through the second valve (13) if the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out).
  9. A cooling device (1) as in Claim 8, characterized by the control unit (11) that, while the refrigerant fluid is being delivered to the bypass line (12),
    - provides the delivery of the refrigerant fluid to the fresh food compartment evaporator (6) by passing through the first valve (10) if the freezing compartment (3) temperature (TFRZ) falls below the freezing compartment (3) cut-out temperature (TFRZcut-out) when the fresh food compartment (2) temperature (TFF) is above the fresh food compartment (2) cut-out temperature (TFFcut-out),
    - provides the delivery of the refrigerant fluid to the compressor (4) by passing through the second valve (13) if the fresh food compartment (2) temperature (TFF) falls below the fresh food compartment (2) cut-out temperature (TFFZcut-out) when the freezing compartment (3) temperature (TFRZ) is above the freezing compartment (3) cut-out temperature (TFRZcut-out), and
    - provides the termination of the delivery of the refrigerant fluid by stopping the compressor (4) if the fresh food compartment (2) temperature (TFF) falls below the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) falls below the freezing compartment (3) cut-out temperature (TFRZcut-out).
  10. A cooling device (1) as in Claim 2, characterized by the control unit (11) that provides the termination of the delivery of the refrigerant fluid by stopping the compressor (4) if the fresh food compartment (2) temperature (TFF) is below the fresh food compartment (2) cut-out temperature (TFFcut-out) and the freezing compartment (3) temperature (TFRZ) is below the freezing compartment (3) cut-out temperature (TFRZcut-out).
EP16700389.6A 2015-01-05 2016-01-05 A cooling device Withdrawn EP3243029A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201500071 2015-01-05
PCT/EP2016/050060 WO2016110481A1 (en) 2015-01-05 2016-01-05 A cooling device

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