Method for controlling the temperature of a refrigeration unit and an arrangement of temperature control for a refrigeration unit

摘要

Invention patent: b "method to control the temperature of a refrigeration unit and an arrangement of temperature control for a refrigeration unit" d .The invention relates to a method for controlling the temperature of a refrigeration unit (1) with a refrigerator compartment (3),A freezing compartment (2) and a common evaporator (4) of a cooling circuit, and a set of corresponding temperature control.And a first mode (normal operation), the compressor (5) of the cooling circuit is turned on when cooling is needed, and is switched off when the cooling is not necessary.The temperature dependence of the refrigerator compartment (t ~ 2 ~).And a second mode, although there is no need for cooling in the refrigerator compartment (3), the compressor (5) is forced on for a predetermined operating time (t ~ 1 ~)When the time of off of the compressor has exceeded a threshold value (t ~ 2 ~). The condition linked forced is repeated so frequ00b3entemente as time off exceeds the limit value.A return to the first mode occurs when the refrigerator compartment (3) require cooling.The arrangement of temperature control involved has a monitoring arrangement (14) for the duration of the time off, a transmitter of the limit value (16) and a comparator (15), which.In the case that the time off is exceeded provides a sign of excess.A timer connected (19) transmits a signal connected to a certain specified duration to the switching device (8).Thus the need for cooling of the freezing compartment (2) and the cooling compartment (3) can be satisfied within a wide range of ambient temperatures.And in addition a freeze protection of the refrigerator compartment evaporator and a defrosting insurance can be provided.