Refrigerator

Abstract

This invention provides a refrigerator for suppressing adverse effects of warm air on foods by uniforming temperature rise in a storage room during defrosting operation. A defrosting heater is energized until a temperature detected by a FD sensor gets to a defrosting ending temperature (8[deg.]C). During defrosting operation for defrosting a F evaporator, a F fan is kept stopped. When the FD sensor detects a temperature not lower than than a set temperature (2[deg.]C) set lower than the defrosting ending temperature (8[deg.]C), the F fan is reversed for a preset time (one minute).

Description

Technical field [0001] The present invention relates to a refrigerator that performs defrosting operation by a defrosting heater. Background technique [0002] In the past, since the moisture in the storage room adheres to the evaporator as frost and reduces the cooling performance, the defrost heater is energized to heat the evaporator in a predetermined cycle, for example, whenever the cumulative operation time of the compressor exceeds 8 hours. The defrosting operation. Figure 6 It is a time chart showing a conventional control method of defrosting operation. After tx has been performed during defrosting operation, the fan for cooling air supply is stopped in advance. When the evaporator reaches the defrosting end temperature, for example, 10°C or higher, it is regarded as At the moment of ty, the adhered frost is melted, the power to the defrost heater is cut off, and the defrost operation is ended. In order to balance the pressure in the refrigeration cycle, the compressor ...

AI Technical Summary

Problems solved by technology

In this case, the upper space of the storage room becomes high temperature during the defrosting operation, and even if the cooling operation is restarted, the cooling is slow and the temperature continues to be high, which adversely affects the food.

Such problems are likely to occur especially when the height of the storage compartment is large in a freezer with a low set temperature.

[0005] In the structure of Patent Document 1, the defrosting time can be shortened because the fan is intermittently reversed, but the total rotation time becomes longer, so warm air is excessively blown into the storage room, and the average temperature in the storage room may increase instead.

In addition, generally speaking, the time until the end of defrosting varies depending on the amount of frost on the evaporator, but since the reverse rotation of the fan is performed after a predetermined time t has elapsed, there may be cases where the reverse rotation of the fan is not performed or reversed. Concerns about temperature rise in the storage room as mentioned above due to excessive rotation time

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