PLANT GROWING SYSTEM

• US 20150128489A1
• Filed: 11/05/2014
• Published: 05/14/2015
• Est. Priority Date: 11/13/2013
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: YAMADA, Makoto, ISHIWATA, Masaki, AOKI, Shinichi, NAKAMURA, Kyohei
• Application Number:
  US14/533,586
• Publication Number:
  US 20150128489A1
• Time in Patent Office: Days
• US Class Current: 47/58.1LS
• CPC Class Codes: A01G 7/045 with electric lighting
• CPC Class Codes: Y02P 60/14 Measures for saving energy, e.g. in green houses

Abstract

In a plant growing system, a first light source irradiates a plant with light having a peak wavelength in a range from 380 to 560 nm and a peak wavelength in a range from 560 to 680 nm and a second light source irradiates the plant with far-red light having a peak wavelength in a range from 685 to 780 nm. Further, a control unit controls the first and the second light source to perform respective irradiation operations and a time setting unit sets a first and a second time zone in which the control unit controls the first and the second light source to perform the respective irradiation operations. The first time zone ranges from a first predetermined time before sunset to a second predetermined time after sunset, and the second time zone starts after the first light source completes its irradiation operation.

Claims

1. A plant growing system, comprising:

a first light source configured to irradiate a plant with light having a peak wavelength in a range from 380 nm to 560 nm and a peak wavelength in a range from 560 nm to 680 nm;

a second light source configured to irradiate the plant with far-red light having a peak wavelength in a range from 685 nm to 780 nm;

a control unit configured to control the first light source and the second light source to perform respective irradiation operations; and

a time setting unit configured to set a first time zone in which the control unit controls the first light source to perform its irradiation operation and a second time zone in which the control unit controls the second light source to perform its irradiation operation,

wherein the first time zone ranges from a first predetermined time before sunset to a second predetermined time after sunset, and the second time zone starts after the first light source completes its irradiation operation.

2. The plant growing system of claim 1, wherein the second predetermined time is 2 hours after sunset.

3. The plant growing system of claim 1, wherein the second time zone starts as soon as the first light source completes its irradiation operation.

4. The plant growing system of claim 1, wherein the first light source and the second light source are accommodated in a single case.

5. The plant growing system of claim 2, wherein the first light source and the second light source are accommodated in a single case.

6. The plant growing system of claim 3, wherein the first light source and the second light source are accommodated in a single case.

7. The plant growing system of claim 1, wherein the second light source emits far-red light with an irradiance of 0.02 W/m² or more and an integrated irradiance per day of 0.2 kJ/m² or more.

8. The plant growing system of claim 2, wherein the second light source emits far-red light with an irradiance of 0.02 W/m² or more and an integrated irradiance per day of 0.2 kJ/m² or more.

9. The plant growing system of claim 3, wherein the second light source emits far-red light with an irradiance of 0.02 W/m² or more and an integrated irradiance per day of 0.2 kJ/m² or more.

10. The plant growing system of claim 4, wherein the second light source emits far-red light with an irradiance of 0.02 W/m² or more and an integrated irradiance per day of 0.2 kJ/m² or more.

11. The plant growing system of claim 5, wherein the second light source emits far-red light with an irradiance of 0.02 W/m or more and an integrated irradiance per day of 0.2 kJ/m² or more.

12. The plant growing system of claim 6, wherein the second light source emits far-red light with an irradiance of 0.02 W/m² or more and an integrated irradiance per day of 0.2 kJ/m² or more.