The R's looked destined for the drop after winning just twice in 27 league matches but consecutive victories over Southampton and Sunderland have brought them to within four points of safety.
Harry Redknapp's side are away to fellow strugglers Aston Villa on Saturday while Wigan come to Loftus Road on 7 April and South Korea international Park is in confident mood.
"There is four points difference now and we all know that the upcoming matches are really important," he told the club's official website.
"Our performances in the last two matches have been good, so we have a good chance of getting out of it.
"The other players believe that as well and now we need to keep this momentum going until the end of the season.
"I'm not putting too much emphasis on winning twice in a row. We're very satisfied that we are getting better and now we need to prepare for the next match.
"We need to keep winning and to get out of the relegation zone.
"The mood in the changing room after winning and losing is totally different. I can see more players laughing after winning a match, and it will have a positive effect in the next match."