It is enough to sleep at night in winter with the air conditioner on and a quilt covered, but it will be very cold around five or six in the morning the next day. What if I have to have two quilts?

When you sleep at night, the temperature is higher than that in the morning. The heating power of the air conditioner keeps the indoor temperature at a temperature that can make you feel comfortable. In the early morning, the outdoor environment temperature drops a lot, and the heat conduction from indoor to outdoor increases a lot, which makes the indoor temperature drop. At this time, if the heating power of air conditioner can't be increased or the increased heating power can't make up for the increased heat from indoor to outdoor, the indoor temperature will drop, and you have to cover two quilts. After analyzing the principle of the above process, the solution to your problem is to replace your air conditioner with a high-power air conditioner to increase the number of passengers, so as to keep the indoor temperature constant.