Thermoelectric cooling-heating mattress

A thermostat controlled mattress, comprising:

• a mattress unit including an underlay, a surface cover and a curved circuit;
• a water circuit tube connected to the curved circuit of the mattress unit so as to allow water to be introduced into the mattress unit;
• a water storage box connected to the water circuit tube to hold water;
• a sensor operatively arranged with respect to the water storage box to sense the temperature and quantity of water contained in the water storage box;
• a thermostat electric circuit responsive to the sensor;
• a power supply operatively connected to the thermostat electric circuit;
• a reservoir connected to the curved circuit of the mattress unit and the water circuit tube;
• a pump to circulate the water in the water circuit tube between the water storage box and the curved circuit of the mattress unit;
• a thermoelectric element operatively connected to the reservoir and the power supply;
• an indicator connected to the thermostat electric circuit and the power supply;
• whereby water is circulated in the water circuit tube between the curved circuit of the mattress unit and the water storage box, through the reservoir, and whereby the water temperature is controlled based on signals generated by the thermostat electric circuit, which activates the power supply operatively connected to the thermoelectric element.