Refrigerator and home appliance

Abstract

A refrigerator includes: a storage compartment; a motor; a door configured to open and close the storage compartment; a compressor configured to supply cold air to the storage compartment, and configured to compress a refrigerant using rotation of the motor; a first printed board assembly (PBA) including: a first communication circuit including a first low pass filter that comprises a first variable resistor and a first variable capacitor, and a first processor connected to the first communication circuit; and a second PBA including: a second communication circuit including a second low pass filter that comprises a second variable resistor and a second variable capacitor, and a second processor connected to the second communication circuit, wherein the first processor is configured to: set a resistance value of the first variable resistor and a capacitance value of the first variable capacitor.

What is claimed is: 
     
         1 . A refrigerator comprising:
 a storage compartment;   a motor;   a door configured to open and close the storage compartment;   a compressor configured to supply cold air to the storage compartment, and configured to compress a refrigerant using rotation of the motor;   a first printed board assembly (PBA) including:
 a first communication circuit comprising a first low pass filter that comprises a first variable resistor and a first variable capacitor, and 
 a first processor connected to the first communication circuit; and 
   a second PBA including:
 a second communication circuit comprising a second low pass filter that comprises a second variable resistor and a second variable capacitor, and 
 a second processor connected to the second communication circuit, 
   wherein the first processor is configured to:
 set a resistance value of the first variable resistor and a capacitance value of the first variable capacitor based on rotational speed information of the motor; and 
 perform communication with the second processor using an asynchronous communication scheme through the first communication circuit. 
   
     
     
         2 . The refrigerator of  claim 1 , wherein the asynchronous communication scheme is a universal asynchronous receiver/transmitter (UART) communication scheme. 
     
     
         3 . The refrigerator of  claim 1 , wherein the first processor is further configured to transmit, to the compressor or a control circuit of the compressor, a control signal corresponding to the rotational speed information of the motor. 
     
     
         4 . The refrigerator of  claim 1 , wherein the first processor is further configured to:
 identify a change in the rotational speed information of the motor; and   change the resistance value of the first variable resistor and the capacitance value of the first variable capacitor, based on the change in the rotational speed information of the motor.   
     
     
         5 . The refrigerator of  claim 4 , wherein the first processor is further configured to, based on a specified condition being met, update obtained setting value information based on a communication success rate, and
 wherein the setting value information includes a resistance setting value of the first variable resistor and a capacitance setting value of the first variable capacitor respectively corresponding to each of a plurality of rotational speeds that are within a rotational speed setting range of the motor.   
     
     
         6 . The refrigerator of  claim 1 , wherein the first processor is further configured to, in a state in which the motor does not rotate,
 obtain a basic communication success rate for the communication performed with the second processor through the first communication circuit using the asynchronous communication scheme, and   determine a basic communication speed of the asynchronous communication scheme based on the basic communication success rate.   
     
     
         7 . The refrigerator of  claim 1 , wherein the first processor is further configured to:
 obtain, based on the rotational speed information about the motor, a combination of a resistance setting value and a capacitance setting value to give a highest communication success rate to the communication with the second processor among combinations of settable resistance values and settable capacitance values; and   change the obtained resistance setting value and the obtained capacitance setting value to the resistance value of the first variable resistor and the capacitance value of the first variable capacitor, respectively.   
     
     
         8 . The refrigerator of  claim 1 , wherein the first communication circuit further comprises a first field-effect transistor (FET),
 wherein a source of the first FET is connected to the first processor,   wherein a drain of the first FET is connected to one end of the first low pass filter, and   wherein another end of the first low pass filter is connected to an output end of the first communication circuit.   
     
     
         9 . The refrigerator of  claim 1 , wherein the resistance value of the first variable resistor and the capacitance value of the first variable capacitor are respectively set to a resistance setting value and a capacitance setting value corresponding to the rotational speed information obtained based on a communication success rate for the communication performed with the second processor. 
     
     
         10 . The refrigerator of  claim 9 , wherein the first processor is further configured to:
 set a rotational speed of the motor to a first rotational speed;   set the first variable resistor and the first variable capacitor to a first resistance value and a first capacitance value, respectively;   obtain a first communication success rate which is the communication success rate for the communication performed with the second processor through the first communication circuit using the asynchronous communication scheme while the motor rotates according to the first rotational speed;   determine whether the first communication success rate is greater than or equal to a previous communication success rate; and   based on identifying that the first communication success rate is greater than or equal to the previous communication success rate, determine the first resistance value and the first capacitance value as a first resistance setting value and a first capacitance setting value, respectively, corresponding to the first rotational speed, and   wherein the previous communication success rate is a communication success rate obtained at a previous time instance.   
     
     
         11 . The refrigerator of  claim 10 , wherein the first processor is further configured to:
 based on identifying that the first communication success rate is greater than or equal to the previous communication success rate, determine whether the communication success rate is greater than or equal to a reference communication success rate; and   based on identifying that the first communication success rate is greater than or equal to the reference communication success rate, determine the first resistance value and the first capacitance value as the first resistance setting value and the first capacitance setting value, respectively, corresponding to the first rotational speed.   
     
     
         12 . The refrigerator of  claim 11 , wherein the first processor is further configured to, based on identifying that that the first communication success rate is lower than the reference communication success rate, determine the first resistance value and the first capacitance value as a temporary resistance setting value and a temporary capacitance setting value, respectively, corresponding to the first rotational speed. 
     
     
         13 . The refrigerator of  claim 11 , wherein the first processor is further configured to reduce a communication speed of the asynchronous communication scheme based on identifying that none of communication success rates obtained for each of combinations of settable resistance values of the first variable resistor and settable capacitance values of the first variable capacitor exceed the reference communication success rate. 
     
     
         14 . The refrigerator of  claim 10 , wherein the first processor is further configured to, based on identifying that that the first communication success rate is lower than the previous communication success rate, determine a second resistance value and a second capacitance value corresponding to the previous communication success rate as a temporary resistance setting value and a temporary capacitance setting value, respectively, corresponding to the first rotational speed. 
     
     
         15 . The refrigerator of  claim 14 , wherein the first processor is further configured to, based on determining the temporary resistance setting value and the temporary capacitance setting value,
 set the first variable resistor to a third resistance value different from the first resistance value and the second resistance value, and   set the first variable capacitor to a third capacitance value different from the first capacitance value and the second capacitance value.   
     
     
         16 . The refrigerator of  claim 10 , wherein the first processor is further configured to:
 transmit a plurality of test packets to the second processor through the first communication circuit using the asynchronous communication scheme while the motor rotates according to the first rotational speed;   receive a plurality of response packets for the plurality of test packets through the first communication circuit from the second processor; and   obtain the first communication success rate, based on a first number of the plurality of test packets and a second number of the plurality of response packets.   
     
     
         17 . A home appliance, comprising:
 an internal noise source comprising a motor or a coil;   a first printed board assembly (PBA) comprising:
 a first communication circuit comprises a first low pass filter that comprises a first variable resistor and a first variable capacitor, and 
 a first processor connected to the first communication circuit; and 
   a second PBA comprising:
 a second communication circuit comprising a second low pass filter that comprises a second variable resistor and a second variable capacitor, and 
 a second processor connected to the second communication circuit, 
   wherein the first processor is configured to:
 set a resistance value of the first variable resistor and a capacitance value of the first variable capacitor, based on information about a rotational speed of the motor or a current of the coil; and 
 perform communication with the second processor using an asynchronous communication scheme through the first communication circuit. 
   
     
     
         18 . The home appliance of  claim 17 , wherein the asynchronous communication scheme is a universal asynchronous receiver/transmitter (UART) communication scheme. 
     
     
         19 . The home appliance of  claim 17 , wherein the first processor is further configured to:
 identify a change in the rotational speed information about the motor; and   change the resistance value of the first variable resistor and the capacitance value of the first variable capacitor, based on the change in the information.   
     
     
         20 . The home appliance of  claim 17 , wherein the resistance value of the first variable resistor and the capacitance value of the first variable capacitor are respectively set to a resistance setting value and a capacitance setting value corresponding to the information obtained based on a communication success rate for the communication performed with the second processor.