CN108925309B - Self-water supply system for agricultural greenhouse - Google Patents
Self-water supply system for agricultural greenhouse Download PDFInfo
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- CN108925309B CN108925309B CN201810870140.2A CN201810870140A CN108925309B CN 108925309 B CN108925309 B CN 108925309B CN 201810870140 A CN201810870140 A CN 201810870140A CN 108925309 B CN108925309 B CN 108925309B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/243—Collecting solar energy
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
- A01G9/247—Watering arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
The invention belongs to the technical field of agricultural greenhouses, and particularly discloses an agricultural greenhouse self-water supply system. The system comprises an optical system arranged in a greenhouse, a water making system arranged at one side of the optical system and a blower connected with the water making system; the solar energy limiting and reflecting device comprises an optical system and is characterized in that the optical system comprises a Fresnel lens, a first concave lens arranged at a converging point of the Fresnel lens and sunlight frequency limiting and reflecting glass arranged below the first concave lens, the water preparation system comprises a heat preservation layer, a selective absorption coating and a moisture absorption layer, the moisture absorption layer comprises an absorption material layer and a metal heat conducting rod, and the heat preservation layer can transmit infrared light reflected by the sunlight frequency limiting and reflecting glass. The invention realizes the ladder utilization of sunlight, is clean and environment-friendly, reduces the consumption of non-renewable energy sources, simultaneously realizes the self-watering function of the greenhouse, can provide agricultural water in water-deficient areas, can be used as the supplement of domestic water, and relieves the problem of water shortage.
Description
Technical Field
The invention belongs to the technical field of greenhouse water supply, and particularly relates to an agricultural greenhouse self-water supply system.
Background
With continuous advancement of society, the traditional agricultural production mode can not meet the requirements of modern civilization development, and new facility agriculture is pursued by industry people. The agricultural equipment is mainly greenhouse facilities, is not limited by time and space, and can be used for agricultural production in special environments such as highland, deep mountain, desert and the like. China is a large agricultural country, farmers account for more than half of the general population, the space for agricultural innovation application is infinite, and the agricultural equipment industry walks from behind the scenes to in front of the tables. The quality of the landed greenhouse projects is naturally and differently different in the large, medium and small enterprises in the national greenhouse industry.
In western inland areas of China, the climate is drought, the annual precipitation is small, and the serious water shortage causes difficulty in realizing agricultural planting; in the island region of China, the sea is surrounded, and the fresh water purification difficulty is high and the cost is high, so that the agricultural water is in shortage.
Chinese patent CN 2051204557U discloses a clean energy system of solar photovoltaic green house, including solar photovoltaic power generation system, ground source heat pump system, drip irrigation system and plant light filling lamp, the electric energy that solar photovoltaic power generation system produced supply ground source heat pump system, drip irrigation system and plant light filling lamp, this system combines ground source heat pump technique and drip irrigation water conservation technique, the water requirement and the temperature condition of the interior crops of photovoltaic green house are provided to this system, this clean energy of solar photovoltaic electric energy source is sourced to the energy source of whole photovoltaic green house system, no pollution to the environment can guarantee the cleanliness of crop growth environment, unnecessary electric energy can be incorporated into the national electric wire netting through the mode of being incorporated into the power networks, be the high-tech ecological system of high-efficient agriculture. However, the scheme does not solve the problems of water shortage and high energy consumption in the conventional planting of the agricultural greenhouse.
Chinese patent CN107996209 a provides an intelligent environmental protection planting big-arch shelter, and it is used for planting the plant, including ceiling, lateral wall, sensor, controller and operation terminal, including the rainwater collecting vat on the ceiling, the rainwater collecting vat is connected to a storage water tank, the rainwater collecting vat below is provided with flexible film solar module, the sensor includes a plurality of sensors, and humidity, illumination, the temperature in the sensor detection big-arch shelter, the test data of a plurality of sensors is obtained to the controller to according to test data control operation terminal, solved the not high problem of intelligent degree of present intelligent environmental protection planting big-arch shelter. The scheme fully utilizes natural precipitation resources, so that the production efficiency of the greenhouse is improved, but the scheme is not suitable for water-deficient areas such as western China.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides an agricultural greenhouse self-water supply system, which aims to utilize the energy of infrared light in sunlight as the heat energy for dehydration of an adsorption material and the rest light as the growth of plants, thereby realizing the step utilization of the sunlight, realizing the self-water supply function of the greenhouse and relieving the problem of water shortage.
In order to achieve the above purpose, the invention provides an agricultural greenhouse self-water supply system, which is characterized by comprising an optical system arranged in a greenhouse, a water making system arranged at one side of the optical system and a blower connected with the water making system;
the optical system comprises a Fresnel lens, a first concave lens arranged at a condensing point of the Fresnel lens and sunlight frequency limiting reflection glass arranged below the first concave lens, wherein a second concave lens is arranged below the sunlight frequency limiting reflection glass, the Fresnel lens is used for linearly condensing sunlight and converting the sunlight into parallel light through the first concave lens, and the sunlight frequency limiting reflection glass is used for reflecting infrared light in the parallel light to the water making system;
the water preparation system comprises a heat preservation layer, a selective absorption coating and a moisture absorption layer, wherein the moisture absorption layer comprises an absorption material layer and a metal heat conduction rod,
the heat insulation layer can transmit infrared light reflected by the sunlight frequency-limiting reflection glass, the selective absorption coating is used for converting the reflected infrared light into heat energy, one end of the metal heat conduction rod is connected with the selective absorption coating, the other end of the metal heat conduction rod penetrates through the adsorption material layer and is used for conducting the heat energy converted by the selective absorption coating to the adsorption material layer to provide energy for desorption water of the adsorption material layer, and the adsorption material is used for adsorbing moisture in air flowing through the adsorption material layer and absorbing heat transferred by the metal heat conduction rod and desorbing the adsorbed moisture to generate liquid water at a temperature lower than the boiling point of the liquid water.
Further, the number of the moisture adsorption layers is a plurality, and the plurality of the moisture adsorption layers are arranged between the layers to form a snake-shaped air passage for air circulation.
Further, one end of the serpentine air passage is connected with the blower, a water collecting tank is arranged below the water preparation system, and a water pipe is arranged on one side of the water collecting tank.
Further, the water producing unit comprises a porous partition plate, wherein the porous partition plate is arranged between the adsorption material and the passage layer, so that the contact area between the adsorption material and air is increased, and the outflow of liquid water is increased when the adsorption material desorbs water.
Furthermore, the number of the metal heat conducting rods is multiple, and the metal heat conducting rods penetrate through the multiple water making units and are detachably connected with the multiple water making units.
Further, metal rib plates are arranged between the selective absorptive coating and the adsorption material and in the adsorption material, and the metal rib plates are fixedly connected with the metal heat conducting rods.
Further, the adsorption material is SiO 2 ·nH 2 O·yCaCl 2 。
Further, the heat preservation layer is a vacuum glass layer.
Further, the selective absorption coating is a metal sheet plated with a solar selective absorption material.
Further, the coverage central angle of the Fresnel lens is not more than 150 degrees, and preferably, the coverage central angle of the Fresnel lens is 120 degrees.
In general, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. according to the agricultural greenhouse self-water supply system, sunlight is linearly focused through the Fresnel lens and the concave lens and then converted into parallel light, infrared light is reflected to the water production system by utilizing the sunlight frequency limiting reflection glass, the absorptive coating is selected to convert infrared light energy into heat energy to provide required energy for dehydration of the absorptive material, the absorptive material is used for absorbing moisture in air flowing through the absorptive material at night and absorbing heat transferred by the metal heat conducting rod in daytime and desorbing the absorbed moisture to generate liquid water at a temperature lower than the boiling point of the liquid water, the solar self-water supply function of the greenhouse is realized through the stepped utilization of the sunlight, the agricultural water is provided in a water-deficient area, meanwhile, the second concave lens below the sunlight frequency limiting reflection glass is used for converting the parallel light transmitted by the frequency limiting reflection glass into light, and providing energy required for growth for crops in the greenhouse, and the stepped utilization of the sunlight is realized.
2. According to the self-water supply system for the agricultural greenhouse, the plurality of moisture adsorption layers are arranged among the layers to form the snake-shaped air passage for air circulation, and the blower sends the ambient air outside the greenhouse into the adsorption material through the snake-shaped air passage, so that the contact area between the adsorption material and the air is further enlarged, and the water absorption efficiency and the dehydration rate of the adsorption material are improved.
3. The invention relates to a self-water supply system of an agricultural greenhouse, which comprises a porous partition plate, wherein the porous partition plate is arranged between an adsorption material and a passage layer, so that the contact area of the adsorption material and air is increased, and liquid water flows out when the adsorption material desorbs water.
4. According to the self-water supply system for the agricultural greenhouse, the number of the metal heat conducting rods is multiple, the metal heat conducting rods penetrate through the water making units and are detachably connected with the water making units, the contact area of the metal heat conducting rods and the adsorption material is increased, and heat conduction is accelerated, so that the desorption speed of the adsorption material for water is accelerated.
5. According to the self-water supply system for the agricultural greenhouse, the metal rib plates are arranged between the selective absorptive coating and the adsorption material and in the adsorption material, and are fixedly connected with the metal heat conducting rods, so that heat of the metal heat conducting rods is effectively and uniformly and rapidly transferred to the adsorption material, and heat conduction is further accelerated, and the speed of desorption of water by the adsorption material is accelerated.
6. The invention relates to a self-water supply system of an agricultural greenhouse, wherein the adsorption material is SiO 2 ·nH 2 O·yCaCl 2 During the adsorption process, a part of water vapor and CaCl 2 The complex is generated by the reaction, and part of water vapor is adsorbed on the pore wall of the porous silica gel due to the intermolecular acting force, so that the porous silica gel composite adsorbent has the characteristics of high adsorption speed and large adsorption capacity, is favorable for taking water from air, and in addition, the material has the advantages of low desorption temperature, capability of directly desorbing to generate liquid water and relatively complete desorption, so that most of water in convection air inside and outside a greenhouse is favorable for being changed into usable liquid water.
7. According to the self-water supply system for the agricultural greenhouse, the glass vacuum heat-insulating layer can reduce heat conduction and heat convection loss, improve energy conversion efficiency, and heat-insulating materials are arranged on other surfaces of the water production unit so as to reduce heat loss between the water production unit and the outside.
Drawings
FIG. 1 is a schematic diagram of a structure of an agricultural greenhouse self-water supply system at noon according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of a self-watering system for agricultural greenhouses at the morning time according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a structure of an agricultural greenhouse self-water supply system at afternoon according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a water making system according to an embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the daytime working state of the water production system according to the embodiment of the invention;
FIG. 6 is a schematic view of a structure of a water preparation system according to an embodiment of the present invention in a night working state;
fig. 7 is a flow chart of an agricultural greenhouse self-water supply system according to an embodiment of the invention.
Like reference numerals denote like technical features throughout the drawings, in particular: 1-sunlight, 2-optical system, 3-water making system, 4-greenhouse body, 5-water pipe, 6-water collecting tank, 7-blower, 201-Fresnel lens, 202-first concave lens, 203-sunlight frequency limiting reflection glass, 204-second concave lens, 301-heat insulation layer, 302-selective absorption coating, 303-metal rib, 304-adsorbing material, 305-porous partition board, 306-snake-shaped air passage, 307-night wet air, 308-openable porous partition board and 309-metal heat conducting rod.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1, 2 and 3, the self-water supply system for the agricultural greenhouse of the present invention includes an optical system 2 and a water production system 3. The optical system 2 is arranged on the inner surface of the greenhouse covering film, and the optical system 2 comprises a Fresnel lens 201, a first concave lens 202, sunlight frequency limiting reflection glass 203 and a second concave lens 204. The Fresnel lens 201 is arranged on the inner surface of the greenhouse covering film, the covering central angle of the Fresnel lens is not more than 150 degrees, and preferably, the covering central angle of the Fresnel lens is 120 degrees, so that the system can conduct linear condensation on sunlight irradiated to the lens surface within the illumination time (7 am-5 pm). The concentrated sunlight is used as the main energy source of the invention. The first concave lens 202 is disposed below the fresnel lens 201, and the first concave lens 202 is identical to the focal point of the fresnel lens 201, and the concentrated sunlight is converted into parallel light by the first concave lens 201 disposed in confocal with the fresnel lens, so that the subsequent frequency division processing is facilitated. The parallel light irradiates the sunlight frequency limiting reflection glass 203 again, near infrared light with the wavelength of 700nm-2500nm is reflected by the sunlight frequency limiting reflection glass 203 to irradiate the water preparation system 3 arranged on the side surface of the optical system, and the near infrared light is used as an energy source of the water preparation system 3. Other visible light in the parallel light is transmitted through the sunlight frequency limiting reflecting glass 203 and is converted into non-parallel light through the second concave lens 204, so that a growing light source is provided for crops in the greenhouse.
As shown in fig. 4, 5 and 6, the water production system according to the present invention is mainly composed of three layers: a solar energy conversion layer, a moisture absorption layer and a serpentine air passage. The solar energy conversion layer is primarily used to convert solar energy into thermal energy required for dehydration of the adsorbent material and includes a selective absorber coating 302 for absorbing near infrared light energy after frequency limiting reflection to heat the device. One side of the selective absorbent coating 302 is provided with an adsorbent material 304 for adsorbing moisture from the air at night and for dehydrating the air after heating at high temperature during the daytime to produce liquid water. The adsorbent material 304 is in close proximity to the metallic fin 303 for rapid transfer of the heat energy converted by the selectively absorptive coating 302 to the adsorbent material 304. The metal heat conducting rods 309 extend through the adsorbent material 304 to assist in better transfer of the heat energy converted by the selective absorption coating 302 to the adsorbent material 304. The inside of the adsorption material 304 is provided with a snake-shaped air passage 306, one end of the snake-shaped air passage 306 is connected with a blower 7, the other end of the snake-shaped air passage is communicated with the environment outside the greenhouse body 1, the blower 7 sends the air outside the greenhouse body 1 to the snake-shaped air passage 306, the adsorption material 304 is cooled, and a water source is provided for the adsorption material 304. A porous partition plate 305 is arranged between the adsorption material 304 and the serpentine air passage 306, so that on one hand, the contact area of the adsorption material 304 and the air flowing through the serpentine air passage 306 is increased, and on the other hand, the outflow of liquid water after the dehydration reaction of the adsorption material 304 is facilitated. The lower part of the water making system 3 is provided with a water collecting tank 6 for collecting liquid water generated after the dehydration reaction of the adsorption material 304. One side of the water collection tank 6 is provided with a water pipe 5 for leading out water in the water collection tank 6 to irrigate plants in the greenhouse.
As a preferred solution of this embodiment, a heat-insulating layer 301 is provided in front of the selective absorbent coating 302, and preferably, the heat-insulating layer 301 is a glass vacuum heat-insulating layer.
As a preferred scheme of the embodiment, the selective absorbing coating clings to the metal rib 303, so that the energy absorbed by the selective absorbing coating 302 can be quickly transferred to the adsorbing material 304 through the metal rib 303, and the dehydration reaction of the adsorbing material is quickened.
As a preferred solution of this embodiment, the water production system 3 is composed of the serpentine air passage 306 and the adsorption material 304, where the adsorption material 304 is placed at intervals, and the space between the adsorption material 304 and the serpentine air passage 306 further enlarges the contact area between the adsorption material 304 and the air, and improves the water absorption efficiency.
As a preferred version of this embodiment, the selective absorber coating 302 is a thin metal wall coated with a solar selective absorber material.
As a preferred aspect of this embodiment, the adsorbent material 304 is a composite adsorbent SiO 2 ·nH 2 O·yCaCl 2 . Silica gel is a solid particle with a hard and porous structure and has a molecular formula of SiO 2 ·nH 2 O is proved to be porous SiO by X-ray diffraction 2 The size of the gaps formed by the framework of the silica gel has different specific surfacesVolume, bulk density, pore size and pore volume. The specific surface area of the macroporous silica gel is about 580m 2 About/g. CaCl (CaCl) 2 And H 2 O can generate reversible chemical reaction to generate hydrate (CaCl) 2 ·H 2 O、CaCl 2 ·2H 2 O、CaCl 2 ·4H 2 O、CaCl 2 ·6H 2 O) at most 6H can be adsorbed by the molecule 2 And O molecules. The specific reaction process is as follows:
CaCl 2 +H 2 O＝CaCl 2 ·H 2 O
CaCl 2 ·H 2 O+H 2 O＝CaCl 2 ·2H 2 O
CaCl 2 ·2H 2 O+2H 2 O＝CaCl 2 ·4H 2 O
CaCl 2 ·4H 2 O+2H 2 O＝CaCl 2 ·6H 2 O
when CaCl 2 When the water vapor is distributed in the pore canal of the silica gel, the water vapor in the air enters the pore canal of the silica gel through diffusion, and CaCl is increased by the high specific surface area of the silica gel 2 Contact area with water vapor, which also enhances CaCl 2 Reaction with water vapor. During the adsorption process, a part of water vapor and CaCl 2 The reaction takes place to form a complex, which is chemisorption, and a part of water vapor is adsorbed on the pore walls of the silica gel due to intermolecular forces, which is physisorption. The composite adsorbent SiO 2 ·nH 2 O·yCaCl 2 The composite adsorbent has the characteristics of high adsorption speed and large adsorption capacity, and is beneficial to taking water from air at night.
Hydrate (CaCl) 2 ·H 2 O、CaCl 2 ·2H 2 O、CaCl 2 ·4H 2 O、CaCl 2 ·6H 2 O) is subjected to desorption reaction under the condition of 60-80 degrees, so that adsorbed water can be easily removed in daytime for greenhouse use.
In northwest China, the summer climate is dry and high temperature. If the adsorption process is carried out at night, the temperature is lower than the average air temperature, and the relative humidity is higher than the average humidity, which is more favorable for the increase of the adsorption amount and the acceleration of the adsorption speed. Meanwhile, the light intensity is high in the daytime, the temperature is high, and the desorption reaction is carried out in the daytime, so that the desorption reaction of the adsorption material is accelerated. Therefore, the composite adsorbent has excellent adsorption performance under the climatic conditions of low humidity and high temperature.
As shown in fig. 7, the workflow of the embodiment of the present invention is as follows:
at night, the blower is started, the blower sucks air outside the greenhouse into the water preparation system, the air fully contacts with the adsorption material in the serpentine air passage, the adsorption material is cooled, the moisture in the air is absorbed by the adsorption material, and the dehydrated air is discharged from the outlet. In the daytime, the blower stops running, sunlight is linearly concentrated through the Fresnel lens at the top of the greenhouse and is converted into parallel light through the first concave lens to be irradiated on the sunlight frequency-limiting reflection glass, wherein near infrared light is reflected to the water production system by the sunlight frequency-limiting reflection glass to provide heat energy for water production, and the rest sunlight is transmitted to the second concave lens through the frequency-limiting reflection glass and is converted into divergent light to provide a light source for plant growth. Near infrared light reflected to the water making system by the sunlight frequency limiting reflection glass is irradiated on the selective absorption coating layer through the glass vacuum heat preservation layer to be converted into heat, and the heat is rapidly conducted to various positions inside the adsorption material through the metal rib plates and the metal heat conducting rods. The adsorption material is heated and then subjected to desorption reaction, water adsorbed at night is sucked out from the air by hydrolysis to form liquid water, the water flows into the water collection tank through the porous partition plate with the openable bottom, and finally the water in the water collection tank is led out through the water pipe to irrigate plants in the greenhouse.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The automatic water supply system for the agricultural greenhouse is characterized by comprising an optical system (2) arranged in the greenhouse, a water production system (3) arranged on one side of the optical system (2) and a blower (7) connected with the water production system (3);
the optical system (2) comprises a Fresnel lens (201), a first concave lens (202) arranged at a condensing point of the Fresnel lens (201), and sunlight frequency limiting reflection glass (203) arranged below the first concave lens (202), wherein a second concave lens (204) is arranged below the sunlight frequency limiting reflection glass, the Fresnel lens (201) is used for linearly condensing sunlight and then converting the sunlight into parallel light through the first concave lens (202), and the sunlight frequency limiting reflection glass (203) is used for reflecting infrared light in the parallel light onto the water production system (3);
the water production system (3) comprises a heat preservation layer (301), a selective absorption coating (302) and a moisture absorption layer, wherein the moisture absorption layer comprises an absorption material (304) and a metal heat conduction rod (309),
the heat insulation layer (301) can transmit infrared light reflected by the sunlight frequency-limiting reflection glass (203), the selective absorption coating (302) is used for converting the reflected infrared light into heat energy, one end of the metal heat conduction rod (309) is connected with the selective absorption coating (302), and the other end of the metal heat conduction rod penetrates through the adsorption material (304) and is used for conducting heat energy converted by the selective absorption coating (302) to the adsorption material (304) to provide energy for the adsorption material (304) to desorb water, and the adsorption material (304) is used for adsorbing moisture in air flowing through the adsorption material and absorbing heat transferred by the metal heat conduction rod (309) and desorbing the adsorbed moisture to generate liquid water at a temperature lower than the boiling point of the liquid water;
the plurality of the moisture adsorption layers are arranged between the plurality of the moisture adsorption layers to form a snake-shaped air passage (306) for ventilation; the moisture adsorption layer comprises a porous partition plate (305), wherein the porous partition plate (305) is arranged between the adsorption material (304) and a serpentine air passage (306), so that the contact area of the adsorption material (304) and air is increased, and liquid water flows out when the adsorption material (304) desorbs moisture; the adsorption material is
。
2. The self-water supply system for the agricultural greenhouse according to claim 1, wherein one end of the serpentine air passage (306) is connected with the blower (7), a water collecting tank (6) is arranged below the water preparation system (3), and a water pipe (5) is arranged on one side of the water collecting tank (6).
3. An agricultural greenhouse self-water supply system according to claim 1 or 2, characterized in that the metal heat conducting rod (309) is provided in plurality and the metal heat conducting rod (309) penetrates through and is detachably connected with a plurality of moisture adsorption layers.
4. An agricultural greenhouse self-water supply system according to claim 1 or 2, characterized in that a metal rib plate (303) is arranged between the selective absorption coating (302) and the absorption material (304) and inside the absorption material (304), and the metal rib plate (303) is fixedly connected with the metal heat conducting rod.
5. The self-water supply system for agricultural greenhouses according to claim 1, wherein the heat-insulating layer (301) is a vacuum glass layer.
6. An agricultural greenhouse self-water supply system as claimed in claim 1, wherein the selectively absorptive coating (302) is a sheet metal plated with solar selectively absorptive material.
7. An agricultural greenhouse self-water supply system according to claim 1 or 2, characterized in that the coverage central angle of the fresnel lens (201) does not exceed 150 °.
8. The agricultural greenhouse self-water supply system according to claim 7, characterized in that the coverage central angle of the fresnel lens (201) is 120 °.
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| CN110786185A (en) * | 2019-11-04 | 2020-02-14 | 黄晓艳 | New energy agriculture greenhouse for improving crop photosynthetic efficiency |
| CN110771397A (en) * | 2019-11-04 | 2020-02-11 | 黄晓艳 | From focusing type new forms of energy green house |
| CN110771399A (en) * | 2019-11-06 | 2020-02-11 | 丁晶 | Even light type new forms of energy green house |
| CN110771398A (en) * | 2019-11-06 | 2020-02-11 | 丁晶 | Spotlight conversion type agricultural new forms of energy big-arch shelter |
| CN111492869B (en) * | 2020-05-15 | 2024-06-14 | 中国农业科学院农业环境与可持续发展研究所 | Sunlight greenhouse air regeneration regulating system and sunlight greenhouse |
| CN113788136B (en) * | 2021-11-10 | 2022-04-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Center shaft ventilation and light condensation airship |
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| CN104452885A (en) * | 2014-12-05 | 2015-03-25 | 广东工业大学 | Equipment for collecting water from ambient air |
| CN206314302U (en) * | 2016-11-04 | 2017-07-11 | 武汉烽火富华电气有限责任公司 | Agricultural greenhouse refractive divides concentration photovoltaic system and agricultural greenhouse |
| CN107258388A (en) * | 2017-07-27 | 2017-10-20 | 安仁信和科技有限公司 | A kind of agricultural planting greenhouse for being easy to light filling |
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