With three of their final five matches at the Liberty Stadium, Rangel believes that Swansea have a good chance of remaining in the top flight.
"We can win games, especially down the Liberty, where we've got three left," the Spaniard told the South Wales Evening Post.
"We have a gap above the relegation zone, it's not a lot, and we have to work hard until the end of the season.
"It's going to be vital to get some points at the Liberty. Those games are going to be very important."
Swansea return to action on Sunday when they host Chelsea in the Premier League.