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JP-7857025-B2 - Air conditioning system and crop cultivation system

JP7857025B2JP 7857025 B2JP7857025 B2JP 7857025B2JP-7857025-B2

Inventors

  • ▲高▼山 弘太郎
  • 磯山 侑里
  • 大場 佳成
  • 荒井 駿平

Assignees

  • 国立大学法人豊橋技術科学大学

Dates

Publication Date
20260512
Application Date
20230912

Claims (7)

  1. It is an air conditioning system, The system comprises an air conditioning unit that delivers regulated air, a first ventilation pipe, a second ventilation pipe, and a plurality of blowers provided in the second ventilation pipe. The first ventilation pipe is installed in the growing space for growing crops at a position lower than the height of the crops. The second ventilation pipe is provided in the growing space at a position higher than the height of the crop. The air conditioning unit is installed in an air-conditioned space separated from the growing space by a partition, and sends the conditioned air into the first ventilation pipe. The first ventilation pipe discharges the adjusted air that has been sent out into the growth space. Multiple blowers send air from the growing space into the second ventilation pipe, The second ventilation pipe discharges the air supplied by the multiple blowers into the air-conditioned space . The aforementioned growing space has a shape in which the longitudinal and transverse directions are determined when viewed from vertically above. The aforementioned air-conditioned space is adjacent to one end of the growth space in the longitudinal direction, The first ventilation pipe and the second ventilation pipe are provided from one end along the longitudinal direction to a position further from the one end than the center of the growing space, The system includes a first control unit that controls the rotational speed of the plurality of blowers according to the distance from one end. Air conditioning system.
  2. The air conditioning system according to claim 1, A crop cultivation system comprising a structure forming the aforementioned growing space and the aforementioned air-conditioned space.
  3. It is a crop cultivation system, Equipped with an air conditioning system and a structure, The aforementioned air conditioning system is The system comprises an air conditioning unit that delivers regulated air, a first ventilation pipe, a second ventilation pipe, and a plurality of blowers provided in the second ventilation pipe. The first ventilation pipe is installed in the growing space for growing crops at a position lower than the height of the crops. The second ventilation pipe is provided in the growing space at a position higher than the height of the crop. The air conditioning unit is installed in an air-conditioned space separated from the growing space by a partition, and sends the conditioned air into the first ventilation pipe. The first ventilation pipe discharges the adjusted air that has been sent out into the growth space. The plurality of blowers send air from the growing space into the second ventilation pipe, The second ventilation pipe discharges the air supplied by the plurality of blowers into the air-conditioned space . The aforementioned structure forms the growing space and the air-conditioned space. A first blower that takes in outside air into the aforementioned air-conditioned space, A light-adjusting member is provided vertically above the crop to adjust the amount of light passing through, An exhaust port for discharging air from the space above the dimming member, The upper space is equipped with a second blower that takes in outside air, The second blower and the exhaust port replace the air in the upper space. The first ventilation pipe and the second ventilation pipe circulate the air in the growing space. The system includes a second control unit that controls the rotational speed of the plurality of blowers according to the rotational speed of the first blower or the second blower. Crop cultivation system.
  4. It is a crop cultivation system, Equipped with an air conditioning system and a structure, The aforementioned air conditioning system is The system comprises an air conditioning unit that delivers regulated air, a first ventilation pipe, a second ventilation pipe, and a plurality of blowers provided in the second ventilation pipe. The first ventilation pipe is installed in the growing space for growing crops at a position lower than the height of the crops. The second ventilation pipe is provided in the growing space at a position higher than the height of the crop. The air conditioning unit is installed in an air-conditioned space separated from the growing space by a partition, and sends the conditioned air into the first ventilation pipe. The first ventilation pipe discharges the adjusted air that has been sent out into the growth space. The plurality of blowers send air from the growing space into the second ventilation pipe, The second ventilation pipe discharges the air supplied by the plurality of blowers into the air-conditioned space . The aforementioned structure forms the growing space and the air-conditioned space. A first blower that takes in outside air into the aforementioned air-conditioned space, A light-adjusting member is provided vertically above the crop to adjust the amount of light passing through, An exhaust port for discharging air from the space above the dimming member, The upper space is equipped with a second blower that takes in outside air, The second blower and the exhaust port replace the air in the upper space. The first ventilation pipe and the second ventilation pipe circulate the air in the growing space. The system includes a third control unit that controls the rotational speed of the plurality of blowers in accordance with the rotational speed of the second blower. Crop cultivation system.
  5. It is a crop cultivation system, Equipped with an air conditioning system and a structure, The aforementioned air conditioning system is The system comprises an air conditioning unit that delivers regulated air, a first ventilation pipe, a second ventilation pipe, and a plurality of blowers provided in the second ventilation pipe. The first ventilation pipe is installed in the growing space for growing crops at a position lower than the height of the crops. The second ventilation pipe is provided in the growing space at a position higher than the height of the crop. The air conditioning unit is installed in an air-conditioned space separated from the growing space by a partition, and sends the conditioned air into the first ventilation pipe. The first ventilation pipe discharges the adjusted air that has been sent out into the growth space. The plurality of blowers send air from the growing space into the second ventilation pipe, The second ventilation pipe discharges the air supplied by the plurality of blowers into the air-conditioned space . The aforementioned structure forms the growing space and the air-conditioned space. A first blower that takes in outside air into the aforementioned air-conditioned space, A light-adjusting member is provided vertically above the crop to adjust the amount of light passing through, An exhaust port for discharging air from the space above the dimming member, The upper space is equipped with a second blower that takes in outside air, The second blower and the exhaust port replace the air in the upper space. The first ventilation pipe and the second ventilation pipe circulate the air in the growing space. The system includes a fourth control unit that controls the rotational speed of the plurality of blowers according to the pressure difference between the growing space and the air-conditioned space. Crop cultivation system.
  6. It is a crop cultivation system, Equipped with an air conditioning system and a structure, The aforementioned air conditioning system is The system comprises an air conditioning unit that delivers regulated air, a first ventilation pipe, a second ventilation pipe, and a plurality of blowers provided in the second ventilation pipe. The first ventilation pipe is installed in the growing space for growing crops at a position lower than the height of the crops. The second ventilation pipe is provided in the growing space at a position higher than the height of the crop. The air conditioning unit is installed in an air-conditioned space separated from the growing space by a partition, and sends the conditioned air into the first ventilation pipe. The first ventilation pipe discharges the adjusted air that has been sent out into the growth space. The plurality of blowers send air from the growing space into the second ventilation pipe, The second ventilation pipe discharges the air supplied by the plurality of blowers into the air-conditioned space . The aforementioned structure forms the growing space and the air-conditioned space. A first blower that takes in outside air into the aforementioned air-conditioned space, A light-adjusting member is provided vertically above the crop to adjust the amount of light passing through, An exhaust port for discharging air from the space above the dimming member, The upper space is equipped with a second blower that takes in outside air, The second blower and the exhaust port replace the air in the upper space. The first ventilation pipe and the second ventilation pipe circulate the air in the growing space. The system includes a fifth control unit that controls the rotational speed of the plurality of blowers according to the pressure difference between the air-conditioned space and the outside space. Crop cultivation system.
  7. It is a crop cultivation system, Equipped with an air conditioning system and a structure, The aforementioned air conditioning system is The system comprises an air conditioning unit that delivers regulated air, a first ventilation pipe, a second ventilation pipe, and a plurality of blowers provided in the second ventilation pipe. The first ventilation pipe is installed in the growing space for growing crops at a position lower than the height of the crops. The second ventilation pipe is provided in the growing space at a position higher than the height of the crop. The air conditioning unit is installed in an air-conditioned space separated from the growing space by a partition, and sends the conditioned air into the first ventilation pipe. The first ventilation pipe discharges the adjusted air that has been sent out into the growth space. The plurality of blowers send air from the growing space into the second ventilation pipe, The second ventilation pipe discharges the air supplied by the plurality of blowers into the air-conditioned space . The aforementioned structure forms the growing space and the air-conditioned space. A first blower that takes in outside air into the aforementioned air-conditioned space, A light-adjusting member is provided vertically above the crop to adjust the amount of light passing through, An exhaust port for discharging air from the space above the dimming member, The upper space is equipped with a second blower that takes in outside air, The second blower and the exhaust port replace the air in the upper space. The first ventilation pipe and the second ventilation pipe circulate the air in the growing space. The system includes a sixth control unit that controls the rotational speed of the plurality of blowers according to the pressure difference between the growing space and the outside space. Crop cultivation system.

Description

This invention relates to an air conditioning system and a crop cultivation system. Patent Document 1 discloses a technology for taking in air from inside a greenhouse, dehumidifying it, and then blowing the dehumidified air back into the greenhouse using a fan. Japanese Utility Model Publication No. 5-90220 This figure shows an example of the overall configuration of crop cultivation system 1.This figure shows an example of a crop cultivation system 1 as viewed in the depth direction.This figure shows an example of a growing space S1 viewed from vertically above.This figure shows a comparative example of the growth space S1 as viewed from vertically above.This figure shows an example of the first rotation speed table.This figure shows an example of a second rotation speed table.This figure shows an example of a third rotation speed table.This figure shows an example of a fourth rotation speed table.This figure shows an example of a fifth rotation speed table.This figure shows an example of the sixth rotation speed table. The embodiments of the present invention will be described below with reference to the drawings. The various features shown in the embodiments below are interchangeable. <Embodiment> Figure 1 shows an example of the overall configuration of crop cultivation system 1. In Figure 1, the three-dimensional coordinate system is indicated by arrows representing the X, Y, and Z axes, respectively. Hereinafter, the X-axis, Y-axis, and Z-axis will be referred to as the left-right direction, the depth direction, and the up-down direction, respectively. Crop cultivation system 1 is a system for cultivating crops while adjusting the environment in a space isolated from the external space S4. Crop cultivation system 1 comprises a pipe house 10 and an air conditioning system 20. The pipe house 10 is a structure that forms a growing space S1 for cultivating crops. The growing space S1 has a shape where the depth direction is longer than the width direction. Crops are grown in rows along the depth direction within the growing space S1. The pipe house 10 has a frame of pipes and a transparent covering. The pipes are made of a strong material such as steel, and the covering is made of a transparent material such as vinyl. The pipe greenhouse 10 forms an air-conditioned space S2 in addition to the growing space S1. The air-conditioned space S2 is adjacent to the depth end of the growing space S1 and has a partition 11 between it and the growing space S1. The growing space S1 and the air-conditioned space S2 are connected in a way that allows air to circulate. The air conditioning system 20 is a system that supplies regulated air to crops while circulating air between the growing space S1 and the air-conditioned space S2. Regulated air is, for example, air whose temperature, humidity, or carbon dioxide concentration has been adjusted to promote crop growth, and will be referred to as "regulated air" below. The air conditioning system 20 comprises an air conditioner 21, a gas cylinder 22, a blower fan 23, a supply duct 24, multiple return duct fans 25, a return duct 26, a first intake fan 27, a second intake fan 28, a bypass duct 29, a control unit 30, and a differential pressure gauge 31. The air conditioner 21 has an outdoor unit (not shown) and supplies air with adjusted temperature, humidity, and airflow. The gas cylinder 22 is a container filled with liquefied carbon dioxide gas, and releases carbon dioxide when the valve is opened. The air supplied by the air conditioner 21 is mixed with the carbon dioxide released by the gas cylinder 22, and air containing a high concentration of carbon dioxide is supplied to the blower fan 23 as regulated air. The blower fan 23 rotates to generate an airflow that sends the regulated air supplied from the air conditioner 21 and gas cylinder 22 into the supply duct 24. The supply duct 24 is a long, slender cylindrical component for transporting gas, and is installed along its depth. The supply duct 24 has openings at regular intervals, and the regulated air that is supplied is released through these openings. The movement path of the regulated air released from the supply duct 24 will be explained with reference to Figure 2. Figure 2 shows an example of the crop cultivation system 1 as viewed in the depth direction. The supply duct 24 is installed so as to be in contact with waterproof vinyl laid on the ground. Note that the waterproof vinyl is not essential, and the supply duct 24 may be installed directly on the ground. Meanwhile, the return duct fan 25 is installed at a position higher than the height of the crop, and rotates to generate airflow towards the inside of the return duct 26. Here, "crop height" refers to the height of the crop when it has grown to its tallest. It is expected that an airflow will be generated from the supply duct 24 towards the return duct fan 25 due to the airflow of regulated air released from the supply duct 24 and the airflow generated b