#Script
PORT=1111
USER=user
remote_ssh="ssh -l $USER -p $PORT"

# Do not put a command in a variable. (Certainly not a local one anyway.)
rsync -avH -e "$remote_ssh" user@server:/foo/bar /foo/bar

# If for some reason you must contain the command, use a function:
rsyncme() {
    rsync -avH -e "$1" user@server:/foo/bar /foo/bar
}

rsyncme "$remote_ssh"