TRANSPORT REFRIGERATION APPARATUS
First Claim
1. A transport refrigeration apparatus including a refrigerant circuit in which a refrigeration cycle is performed, comprising:
- a fan configured to supply air to an air heat exchanger connected to the refrigerant circuit;
a fan motor configured to drive the fan;
an abnormality determinator configured to compare a current value for current flowing through the fan motor with a preset current threshold to determine occurrence of a motor abnormality of the fan motor; and
a threshold changer configured to change the current threshold of the abnormality determinator in accordance with a supply frequency and a supply voltage of a power supply configured to supply power to the fan motor.
1 Assignment
0 Petitions
Accused Products
Abstract
According to the present disclosure, in a container refrigeration apparatus configured to cool the inside of a container, the accuracy of determination of occurrence of a lock abnormality and a connection abnormality of a motor is increased, and erroneous detection of the motor abnormalities is reduced or prevented. The container refrigeration apparatus of the present disclosure includes an abnormality determinator configured to compare a value for current flowing through an in-compartment motor with a preset current threshold to determine occurrence of the motor abnormalities of the in-compartment motor, and a threshold changer configured to change the current threshold of the abnormality determinator in accordance with a supply voltage for each supply frequency of a power supply configured to supply power to the in-compartment motor.
12 Citations
10 Claims
-
1. A transport refrigeration apparatus including a refrigerant circuit in which a refrigeration cycle is performed, comprising:
-
a fan configured to supply air to an air heat exchanger connected to the refrigerant circuit; a fan motor configured to drive the fan; an abnormality determinator configured to compare a current value for current flowing through the fan motor with a preset current threshold to determine occurrence of a motor abnormality of the fan motor; and a threshold changer configured to change the current threshold of the abnormality determinator in accordance with a supply frequency and a supply voltage of a power supply configured to supply power to the fan motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification