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Physical method for maintaining freshness of vegetables and fruits via technology of optical signal and optical signal generator

  • US 9,936,716 B2
  • Filed: 11/18/2015
  • Issued: 04/10/2018
  • Est. Priority Date: 12/23/2013
  • Status: Active Grant
First Claim
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1. An optical signal generator for maintaining freshness of vegetables or fruits and in the form of a cabinet structure, comprising:

  • an enclosure (3);

    a main frame (2) disposed in the enclosure (3);

    a lighting plate structure (1) mounted inside the main frame (2) and the enclosure (3),a door (4) and a receiving device (6) for receiving vegetables or fruits to be placed within the enclosure (3),a transparent isolation fence or glass-plate (7) mounted on the surface of the lighting plate structure (1);

    a fan and an air duct (8) mounted inside the enclosure (3);

    a wind hole (9) disposed on a bottom side of the enclosure (3); and

    an automatic humidifying system (13) with a humidifying tube interface (14) mounted on a side of the enclosure (13),wherein the lighting plate structure (1) comprises;

    a computer programmable pulsed scanning signal generator (22),a red light source group (26), a green light source group (27), and a blue light source group (28), anda red light source TRIAC controller (23), a green light source TRIAC controller (24), and a blue light source TRIAC controller (25), each of which is connected to and is configured to receive a pulse from the computer programmable pulsed scanning signal generator (22) and thereby correspondingly controls the red light source group (26), the green light source group (27), and the blue light source group (28) to emit light signals, with a pulsed or pulsed periodical scanning combined spectrum, to the vegetables or fruits to maintain freshness of the vegetables or fruits.

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