Flight Phil- China Jan.13 & arriving Beijing 2pm. nxt flight to sweden Jan.14, 2pm.want room

want to have a room where we can stay for a night...we're 2 adults and 1 child 4y.o. if there is inside at the airport that we dont need to have a VISA because we're just having a stop over there in Capital Airport..then waiting for the next flight to go back home in Sweden..anyone can help us plz?