초록 ▼

A door ajar alarm system for a refrigerator-freezer, the system having a variable alarm delay period. The door ajar alarm system includes a control which may be digital or analog for monitoring various operating conditions of the refrigerator such as the temperatures of the refrigerator compartments

A door ajar alarm system for a refrigerator-freezer, the system having a variable alarm delay period. The door ajar alarm system includes a control which may be digital or analog for monitoring various operating conditions of the refrigerator such as the temperatures of the refrigerator compartments and whether the refrigerator is undergoing a defrost operation. The control determines the alarm delay period in accordance with the monitored conditions such that the delay period is decreased in response to each monitored condition which reaches a predetermined status. The door ajar alarm thus alerts the user to operating conditions which are likely to produce an undesirable temperature within the refrigerator more rapidly than usual or to produce temperatures from which recovery is unusually slow.

대표청구항 ▼

In a refrigeration apparatus having means defining a refrigerated compartment and a door for providing access to said compartment, an improved door ajar alarm comprising: means for sensing when said door is open; means for sensing an operating condition of said refrigeration apparatus other than the

In a refrigeration apparatus having means defining a refrigerated compartment and a door for providing access to said compartment, an improved door ajar alarm comprising: means for sensing when said door is open; means for sensing an operating condition of said refrigeration apparatus other than the position of said door; means for providing an alarm; and control means coupled to said door sensing means, said condition sensing means and said alarm means for actuating said alarm means in response to said door being open for a period of time which varies in accordance with the sensed operating condition of the refrigeration apparatus.