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1. (WO2010076229) A COOLING DEVICE
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

Claims

1. A cooling device (1 ) that comprises:

- a fresh food compartment (2) wherein the foods are stored therein for cooling,

- a freezer compartment (3) wherein the foods are stored therein for freezing, kept at lower temperatures than the fresh food compartment (2),

- a compressor (4),

- a fresh food compartment evaporator (5) for cooling the fresh food compartment (2) by providing heat transfer between the refrigerant fluid and the environment,

- a freezer compartment evaporator (6) connected in series to the fresh food compartment evaporator (5), for cooling the freezer compartment (3),

- a fresh food compartment fan (7) which provides to activate the cold air in the vicinity of the fresh food compartment evaporator (5) and blow into the fresh food compartment (2),

- a freezer compartment fan (8) which provides to activate the cold air in the vicinity of the freezer compartment evaporator (6) and blow into the freezer compartment (3),

- a fresh food compartment sensor (9) that measures the temperature inside the fresh food compartment (2),

- a freezer compartment sensor (10) that measures the temperature inside the freezer compartment (3),

- a control unit (11) that provides to keep the temperatures of the fresh food compartment (2) and the freezer compartment (3) within certain temperature ranges by controlling the activation and/or deactivation of the compressor (4), the fresh food compartment fan (7) and/or the freezer compartment fan (8) depending on the temperature values detected by the fresh food compartment sensor (9) and/or the freezer compartment sensor (10), and characterized by the control unit (11) that controls the temperature (TFF) detected by the fresh food compartment sensor (9) when the compressor (4) is operated by the actuation of the freezer compartment sensor (10) and if the temperature (TFF) detected by the fresh food compartment sensor (9) is greater than a first threshold temperature (T1) which is lower than the fresh food compartment (2) activation temperature (TFFcut-in) and greater than the fresh food compartment (2) deactivation temperature (TFFcut-out), then operates the fresh food compartment fan (7) together with the freezer compartment fan (8).

2. A cooling device (1) as in Claim 1 , characterized by the control unit (11) that stops the fresh food compartment fan (7) when the temperature (TFF) detected by the fresh food compartment sensor (9) is equal to or smaller than a second threshold temperature value (T2) that is greater than the fresh food compartment (2) deactivation temperature (TFFcut-out).

3. A cooling device (1) as in Claim 1 or 2, characterized by the control unit (11) that operates the fresh food compartment fan (7) together with the freezer compartment fan (8) at the first threshold temperature (T1) that is approximately 1 0C lower than the fresh food compartment (2) activation temperature (TFFcut-in).

4. A cooling device (1) as in Claim 1 or 2, characterized by the control unit (11) that operates the fresh food compartment fan (7) together with the freezer compartment fan (8) at the first threshold temperature (T1) that is equal to half the sum of the maximum temperature value (TFFmax) and the minimum temperature value (TFFmin) detected by the fresh food compartment sensor (9) in the previous refrigeration cycle.

5. A cooling device (1) as in any one of the Claims 2 to 4, characterized by the control unit (11) that stops the fresh food compartment fan (7) when the temperature (TFF) detected by the fresh food compartment sensor (9) reaches to the second threshold temperature (T2), which is lower than the last return temperature (LRT), which is saved in the cycle wherein the compressor (4) is activated by the freezer compartment sensor (10) after the last cycle wherein the compressor (4) is actuated by the fresh food compartment sensor (9) and and which is the maximum temperature value detected by the fresh food compartment sensor (9), by as much as temperature difference (ΔT) determined by the producer.

6. For a cooling device (1) as in any one of the above claims, a control method comprising the following steps:

- Measuring the temperatures (TFF and TFRZ) detected by the fresh food compartment sensor (9) and the freezer compartment sensor (10) (101), - Determining whether any one of the compartments (2, 3) require cooling depending on the temperatures (TFF and TFRZ) detected by the fresh food compartment sensor (9) and the freezer compartment sensor (10) (102),

- Operating the compressor (4) if any one of the compartments (2, 3) require cooling (103),

- Controlling whether the compressor (4) is actuated by the fresh food compartment sensor (9) or the freezer compartment sensor (10) (104),

- If the compressor (4) is not actuated by the freezer compartment sensor (10), then operating the fresh food compartment fan (7) and the freezer compartment fan (8) (106),

- Controlling whether or not the fresh food compartment (2) is cooled (107),

- If the fresh food compartment (2) is cooled, then controlling whether or not the freezer compartment (3) is cooled (108),

- If the freezer compartment (3) is cooled then terminating the process (109),

- If the compressor (4) is actuated by the freezer compartment sensor (10) then controlling the temperature (TFF) detected by the fresh food compartment sensor (9) (105),

- When the temperature (TFF) detected by the fresh food compartment sensor (9) is greater than the first threshold temperature (T1) then operating the fresh food compartment fan (7) together with the freezer compartment fan (8) (110),

- Controlling whether or not the fresh food compartment sensor (9) has reached the second threshold temperature value (T2) (112),

- If the temperature detected by the fresh food compartment sensor (9) has reached the second threshold temperature value (T2), then stopping the fresh food compartment fan (7) (113),

- If the temperature (TFF) detected by the fresh food compartment sensor (9) is smaller than the first threshold temperature (T1) then operating the freezer compartment fan (8) (111),

- Controlling whether or not the freezer compartment (3) is cooled (108),

- If the freezer compartment (3) is cooled, then terminating the process (109).