I've never tried this, but you might be able to do something like:
$query_name = "LOAD DATA INFILE ' "
. $file_path .
"' INTO TABLE '"
. $this->table_name .
" ' FIELDS TERMINATED BY '\,'
LINES TERMINATED BY '\\n'
IGNORE 1 LINES
(@mytimestamp,`day_chan2`,`day_chan3`)
SET time_stamp=STR_TO_DATE(@mytimestamp, '%d/%m/%Y %h:%i');"
There are examples of this in the MySQL documentation: