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Insole for controlling and adjusting the temperature of the foot

  • US 10,285,469 B2
  • Filed: 08/25/2017
  • Issued: 05/14/2019
  • Est. Priority Date: 08/26/2016
  • Status: Active Grant
First Claim
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1. An insole for controlling and adjusting the temperature of a foot, said insole comprising from top to bottom:

  • a first heat conductive layer (1) made of fabric, comprising a first surface (1A) intended to contact said foot, and a second surface (1B), opposite to said first surface (1A);

    a second heat insulating layer (2), comprising a first surface (2A) in contact with the second surface (1B) of said first heat conductive layer (1), and a second surface (2B), opposite to said first surface (2A), where said second heat insulating layer (2) has a through hole (200), arranged substantially at the center of the foot sole, inside which a Peltier cell (CP) is arranged, said Peltier cell comprising a first surface (CP1) and a second surface (CP2), opposite to said first surface (CP1), where said first surface (3A) of said Peltier cell (CP) at least partially contacts the second surface (1B) of said first heat conductive layer (1);

    said Peltier cell (CP) having a predetermined polarity such that, when the Peltier cell (CP) is turned on, the first surface (CP1) of said Peltier cell (CP) is heated or cooled;

    a third heat dissipating layer (3), comprising a first surface (3A) having shape and dimensions such as to contact at least partially said second surface (2B) of said second heat insulating layer (2) at the second surface (CP2) of said cell Peltier (CP), where said third heat dissipating layer (3) comprises;

    a first seat (31) housing an accelerometer (AC) and a logic control unit (MC), where said logic control unit (MC) is connected to said accelerometer (AC) and, via an H-bridge (HB), to said cell Peltier (CP), anda second seat (32) housing power supply means (MA), connected to said logic control unit (MC), for supplying said logic control unit (MC) and said Peltier cell, as well as said accelerometer (AC),said insole further comprising;

    a first flexible printed circuit (21) configured to measure the temperature of the foot and the first surface (CP1) of the Peltier cell (CP), comprising a first portion (211), connected to the logic control unit (MC), a second portion (212), arranged in contact to the first surface (CP1) of the Peltier cell (CP), and a third portion (213), arranged in contact with the first surface (2A) of said second heat insulating layer (2), where said first flexible printed circuit (21) comprises;

    at least one first temperature sensor (21A) for detecting the temperature of the foot in a respective foot point, arranged inside said third portion (213) of said flexible printed circuit (21), and at least one further first temperature sensor (S1) for detecting the temperature in a respective point of said first surface (CP1) of said Peltier cell (CP), arranged inside said second portion (212) of said flexible printed circuit (21);

    wheresaid accelerometer (AC) is configured to detect an acceleration and send a signal to said logic control unit (MC) to communicate that an acceleration has been detected or has not been detected in a predetermined period of time,said logic control unit (MC) is connected to said at least one first temperature sensor (21A) and said at least one further first temperature sensor (S1), by means of said flexible printed circuit (21), and is configured to;

    communicate with said accelerometer (AC) to know whether a foot is in contact with said insole,turn on and off said Peltier cell (CP), said at least one first temperature sensor (21A), said at least one further first temperature sensor (S1), respectively, when the foot is in contact with said insole and when the foot is not in contact with said insole,acquiring the temperature value detected by said at least one first temperature sensor (21A),comparing the said temperature value detected by said at least one first temperature sensor (21A) with a predetermined temperature range comprised between a predetermined first temperature threshold and a predetermined second temperature threshold, where said predetermined second temperature threshold is greater than said predetermined first temperature threshold,turn on the Peltier cell (CP) so that its first surface (CP1) is heated or cooled, when said temperature value is less than said predetermined first temperature threshold or greater than said predetermined second threshold temperature, or turn on the cell Peltier (CP) and reverse said predetermined polarity of said Peltier cell (CP) via said H-bridge (HB), so that the first surface (CP1) is cooled or heated, when said temperature value is greater than said predetermined second temperature threshold or less than the predetermined first temperature threshold,acquiring the temperature value detected by said further first temperature sensor (S1),comparing said temperature value acquired from said further first temperature sensor (S1) with a predetermined third temperature threshold,turn off the Peltier cell (CP) when said temperature value of said first surface (CP1) of the Peltier cell (CP) is higher or lower than the predetermined third temperature threshold.

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