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Heat preservation system and smart cup using same

  • US 9,839,324 B2
  • Filed: 06/25/2015
  • Issued: 12/12/2017
  • Est. Priority Date: 05/29/2015
  • Status: Active Grant
First Claim
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1. A heating preservation system comprising:

  • a selected unit configured to select a preset temperature from amongst a plurality of differing preset temperatures, each preset temperature corresponding to a preset voltage;

    a control unit configured to send the preset voltage according to the selected preset temperature;

    a detection unit configured to detect a temperature of a fluid and convert the temperature to a detected voltage;

    a comparison unit configured to receive the preset voltage and the detected voltage and compare the detected voltage with the preset voltage; and

    a heating unit configured to heat the fluid when the detected voltage is less than the preset voltage, and stop heating the fluid when the detected voltage is more than the preset voltage;

    wherein the detection unit comprises a pull-up resistor and a thermistor, a first end of the pull-up resistor is coupled to a high level voltage, a second end of the pull-up resistor is coupled to a first end of the thermistor, a second end of the thermistor is grounded.

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