Refrigerator and method for controlling same

A refrigerator comprising:

• a cabinet having a storage space;
• a cooler configured to cool the storage space;
• a temperature sensor configured to sense a temperature of the storage space at a set time interval;
• and
• a controller configured to control the cooler,
• wherein the controller is configured to adjust a cooling capacity of the cooler based on a difference between a previous temperature of the storage space and a current temperature of the storage space,
• wherein the cooling capacity of the cooler is determined by an equation of:
• MVt=MVt-1−Kp(et−et-1), and
• wherein:
• MVt is a current cooling capacity of the cooler,
• MVt-1 is a previous cooling capacity of the cooler,
• Kp is a P control gain value,
• et is a difference between a set temperature and the current temperature,
• et-1 is a difference between the set temperature and the previous temperature, and
• Kp is a variable that is determined based on the difference between the previous temperature of the storage space and the current temperature of the storage space.

A refrigerator comprising:

• a cabinet providing a storage space;
• a cooler configured to cool the storage space;
• a temperature sensor configured to sense a temperature of the storage space at a set time interval;
• and
• a controller configured to control the cooler,
• wherein the controller is configured to adjust a cooling capacity of the cooler based on a difference between a set temperature and a current temperature of the storage space,
• wherein the cooling capacity of the cooler is determined by MVt=MVt-1−Ki(et),
• wherein:
• MVt is a current cooling capacity of the cooler,
• MVt-1 is a previous cooling capacity of the cooler,
• Ki is an I control gain value,
• et is a difference between the set temperature and the current temperature, and
• Ki is a variable that is determined based on the difference between the set temperature and the current temperature of the storage space.

A refrigerator comprising:

• a cabinet providing a storage space;
• a cooler configured to cool the storage space;
• a temperature sensor configured to sense a temperature of the storage space at a set time interval;
• and
• a controller configured to control the cooler,
• wherein:
• the controller is configured to perform a constant temperature control or a normal control,
• during the constant temperature control, the controller is configured to adjust an output the cooler based on one or more of a first value that is a difference between a previous temperature of the storage space and a current temperature of the storage space or a second value that is a difference between a set temperature and the current temperature of the storage space,
• when the controller is performing the constant temperature control, when a constant temperature control termination condition is satisfied, the controller switches to performing the normal control, and
• during the constant temperature control, the set time interval is variable, and during the normal control, the set time interval is fixed.

A refrigerator comprising:

• a cabinet providing a storage space;
• a cooler configured to cool the storage space;
• a temperature sensor configured to sense a temperature of the storage space at a set time interval;
• and
• a controller configured to control the cooler,
• wherein:
• the controller is configured to adjust an output the cooler based on one or more of a first value that is a difference between a previous temperature of the storage space and a current temperature of the storage space or a second value that is a difference between a set temperature and the current temperature of the storage space, and
• the controller is configured to control the cooler so that the set time internal when the set temperature is less than a limit temperature differs from the set time internal when the set temperature is equal to or greater than the limit temperature.