Is it better to sleep in summer and turn on the air conditioner for dehumidification or refrigeration?

It depends on your personal preference and environmental conditions. If you live in a humid area, dehumidification mode may be more suitable for you because it can reduce the humidity in the air and make you feel more comfortable. If you live in a dry area, the cooling mode may be more suitable for you, because it can lower the indoor temperature and make you feel cooler. No matter which mode you choose, you should pay attention to maintaining proper temperature and humidity to avoid adverse effects on your body.