A graphene radiation enhancement device for greenhouses

Abstract

The present invention discloses a graphene radiation enhancement device for a greenhouse, which relates to the field of auxiliary facilities for agricultural planting. The device comprises a box body and a thermal insulation cover, the thermal insulation cover being movably mounted on the top of the box body. A heat radiation assembly is mounted in the box body, and the heat radiation assembly comprises a photothermal absorption plate, heat transfer ribs, a heat storage medium layer, and a graphene infrared radiation plate. The photothermal absorption plate is located between the thermal insulation cover and the graphene infrared radiation plate. The photothermal absorption plate and the graphene infrared radiation plate are connected by a plurality of heat transfer ribs, and the heat storage medium layer is filled on both sides of the heat transfer ribs. When the ambient temperature is too low, the heat energy stored in the heat storage medium layer is convectively transferred with the graphene infrared radiation plate, so that the graphene infrared radiation plate maintains a heat radiation temperature in a cold environment. This allows the graphene infrared radiation plate to maintain a heat radiation temperature even when the ambient temperature is too low.

Description

Technical Field

[0001] The present invention belongs to the field of auxiliary facilities for agricultural planting, and in particular relates to a graphene radiation enhancement device for a greenhouse. Background Art

[0002] Greenhouses, also known as greenhouses, are facilities designed to cultivate plants, providing light transmission, heat preservation (or heating). They provide a growth period and increase yields during seasons unsuitable for plant growth. They are often used to cultivate or raise seedlings of warm-loving vegetables, flowers, and trees during cooler months. Greenhouses have significantly increased rural labor absorption capacity, improved land utilization, and agricultural output, creating opportunities for farmers to increase their incomes. While impoverished areas once advocated "one greenhouse per household to achieve moderate prosperity," greenhouse development is currently facing unprecedented challenges. Existing coal-fired boilers for heating have been banned due to environmental pollution. Switching to natural gas or electricity, with its high electricity prices and gas costs, significantly reduces farmers' profits. New technologies are urgently needed to achieve the goals of energy conservation, environmental protection, and increased production and income.

[0003] Greenhouse heating energy consumption is a major winter operating cost. Utilizing natural energy and reducing energy consumption is the most direct way to improve greenhouse production efficiency. Therefore, there is an urgent need for an auxiliary device that can utilize natural energy to provide energy for greenhouses in winter, thereby reducing the cost of greenhouse heating during winter.

[0004] Graphene is a thermal radiation material with excellent performance. However, the infrared radiation temperature of graphene infrared radiation panels is correlated with the ambient temperature. When the ambient temperature is below 0°C, the thermal radiation temperature of the graphene infrared radiation panels drops significantly. As the ambient temperature decreases, the downward trend in the thermal radiation temperature of the graphene infrared radiation panels accelerates. Practice has shown that in low-temperature cold environments, especially seasonal extreme cold waves, the thermal radiation intensity of graphene infrared radiation panels decreases significantly. Summary of the Invention

[0005] In order to reduce the heating energy consumption of greenhouses in winter, the present invention aims to provide a graphene radiation enhancement device for greenhouses.

[0006] The technical solution adopted in the present invention is:

[0007] A graphene radiation enhancement device for a greenhouse comprises a box body and a thermal insulation cover, the thermal insulation cover is movably mounted on the top of the box body, a heat radiation component is mounted in the box body, the heat radiation component comprises a photothermal absorption plate, a heat transfer rib, a heat storage medium layer and a graphene infrared radiation plate, the photothermal absorption plate is located between the thermal insulation cover and the graphene infrared radiation plate, a plurality of heat transfer ribs are evenly arranged on the photothermal absorption plate for connection, both sides of each heat transfer rib are filled with a heat storage medium layer, one end of the heat storage medium layer away from the photothermal absorption plate is connected to the graphene infrared radiation plate, the graphene infrared radiation plate is connected to a power supply, and the graphene infrared radiation plate is used to radiate heat energy to the greenhouse.

[0008] Preferably, the graphene infrared radiation plate includes a rigid substrate, an insulating base film, a graphene coating, an insulating interlayer and a rigid plywood. The graphene coating is arranged between the rigid substrate and the rigid plywood, and the two sides of the graphene coating close to the rigid substrate and the rigid plywood are respectively covered with an insulating base film and an insulating interlayer.

[0009] Preferably, the light and heat absorption plate is an aluminum plate.

[0010] Preferably, the side of the light and heat absorption plate away from the graphene infrared radiation plate is covered with a carbon coating layer.

[0011] Preferably, the carbon coating layer includes a binder and a carbon material, wherein the weight portion of the binder is 90 to 93 parts, and the weight portion of the carbon material is 7 to 10 parts.

[0012] Preferably, the weight portion of the adhesive is 93 parts, the weight portion of the carbon material is 7 parts, the adhesive is acrylic resin emulsion or polyurethane coating, and the carbon material is one or a combination of two or more of graphite powder, carbon nanotubes and graphene.

[0013] Preferably, the heat transfer rib is a Z-shaped plate, one end of the Z-shaped plate is connected to the light and heat absorption plate, and the other end is close to the graphene infrared radiation plate.

[0014] Preferably, paraffin or stearic acid is selected as the heat storage medium layer.

[0015] Preferably, the thermal insulation cover comprises a thermal insulation cover shell and a thermal insulation filling layer. The thermal insulation filling layer fills the entire inner cavity of the thermal insulation cover shell, and the thermal insulation filling layer is made of rubber thermal insulation material.

[0016] Preferably, the box body and the insulation cover are hingedly connected, and hanging support ears are provided on both sides of the outer wall of the box body, and the hanging support ears are used to install the box body on the top of the greenhouse.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a graphene radiation enhancement device for a greenhouse, comprising a housing and an insulation cover. The insulation cover is movably mounted on the top of the housing. A heat radiation assembly is mounted within the housing. The heat radiation assembly comprises a photothermal absorption plate, heat transfer ribs, a heat storage medium layer, and a graphene infrared radiation plate. The photothermal absorption plate is positioned between the insulation cover and the graphene infrared radiation plate. The photothermal absorption plate and the graphene infrared radiation plate are connected by a plurality of heat transfer ribs, and the heat storage medium layer is filled on both sides of the heat transfer ribs. When powered on, the graphene infrared radiation plate radiates heat energy to the environment. During the day, the photothermal absorption plate absorbs solar energy, converts it into heat energy, and stores it in the heat storage medium layer via the heat transfer ribs. When the ambient temperature is too low, the heat energy stored in the heat storage medium layer is transferred through convection with the graphene infrared radiation plate, allowing the graphene infrared radiation plate to maintain its heat radiation temperature even in cold environments. This allows the graphene infrared radiation plate to maintain its heat radiation temperature even when the ambient temperature is too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the present invention.

[0020] Figure 2 It is a right side schematic diagram of the present invention.

[0021] Figure 3 It is a schematic top view of the present invention.

[0022] Figure 4 It is a half-section schematic diagram of a front view of the present invention.

[0023] Figure 5 It is a top view schematic diagram of the present invention without the heat-insulating cover and the light-heat absorption plate.

[0024] Figure 6 It is a half-A sectional schematic diagram of the front view of the box body of the present invention.

[0025] Figure 7 It is a partial schematic diagram of the light and heat absorption plate and the heat transfer ribs of the present invention.

[0026] Figure 8 It is a structural schematic diagram of the clamping member of the present invention.

[0027] Figure 9 It is a schematic diagram of the internal structure of the graphene infrared radiation panel of the present invention.

[0028] In the figure: 1-heat radiation component, 11-graphene infrared radiation plate, 111-rigid substrate, 112-insulating base film, 113-graphene coating, 114-insulating interlayer, 115-rigid splint, 12-heat transfer ribs, 13-heat storage medium layer, 14-clamping part, 141-first clamping groove, 142-second clamping groove, 15-photothermal absorption plate, 151-carbon coating layer, 2-insulation cover, 3-hinged connection part, 4-suspension support ear seat. DETAILED DESCRIPTION

[0029] Example 1:

[0030] In this embodiment, if Figures 1 to 3 The graphene radiation enhancement device shown is for a greenhouse, comprising a box body and an insulation cover 2, which is movably mounted on the top of the box body. The box body and the insulation cover 2 are hingedly connected via a hinged connector 3 arranged at one end of the box body. Suspension support ear seats 4 are provided on both sides of the outer wall of the box body, and the suspension support ear seats 4 are used to install the box body on the top of the greenhouse.

[0031] In this embodiment, specifically, when the heat preservation cover 2 is opened, the light heat absorption plate 15 receives solar radiation, and when the heat preservation cover 2 is closed, the light heat absorption plate 15 is insulated and is in a heat preservation state.

[0032] In this embodiment, specifically, the insulation cover 2 includes an insulation cover shell and an insulation filling layer. The insulation filling layer fills the entire inner cavity of the insulation cover shell. The insulation filling layer is made of rubber insulation material. The rubber-plastic insulation material is an elastic closed-cell foam material with low thermal conductivity, fire retardancy, moisture resistance, and simple construction. The product does not contain fiber dust and will not breed harmful substances such as mold. It is a high-quality new generation of thermal insulation materials. The insulation cover shell is made of polyvinyl chloride plastic.

[0033] In this embodiment, if Figures 4-6 As shown, a heat radiation component 1 is installed in the box body, and the heat radiation component 1 includes a photothermal absorption plate 15, a heat transfer rib 12, a heat storage medium layer 13 and a graphene infrared radiation plate 11. The photothermal absorption plate 15 is located between the thermal insulation cover 2 and the graphene infrared radiation plate 11. A number of heat transfer ribs 12 are evenly arranged on the photothermal absorption plate 15. Both sides of each heat transfer rib 12 are filled with a heat storage medium layer 13. The end of the heat storage medium layer 13 away from the photothermal absorption plate 15 is connected to the graphene infrared radiation plate 11. The graphene infrared radiation plate 11 is connected to a power supply, and the graphene infrared radiation plate 11 is used to radiate heat energy to the greenhouse.

[0034] In the field of plant growth technology, light is a crucial ecological factor for plants, influencing their growth and development. Solar radiation is composed of light waves of many different wavelengths, and the distribution of solar radiation energy along these wavelengths is called the solar spectrum. Solar radiation reaching the ground consists of three components: ultraviolet light, visible light, and infrared light. Chlorophyll has a low absorption rate for infrared light, but when it strikes a plant, it can raise its temperature, ensuring optimal growth and development. Infrared light can promote seed or spore germination and stem elongation, stimulate cell elongation, and influence flowering and seed germination, thereby promoting reproductive development, bud formation, and fruit set. Visible infrared light has a direct impact on plant growth. To improve plant growth quality, artificial infrared light can be produced to regulate and intervene in plant growth.

[0035] Graphene is composed of a single layer of carbon atoms bonded together in a repeating hexagonal pattern. It is a two-dimensional material with remarkable properties. When heated by electricity, graphene films generate far-infrared radiation in the 5-15μm range. Graphene films also have high thermal and electrical conductivity and high light transmittance. They are commonly used in graphene solar power generation devices, which help improve the efficiency of light energy utilization.

[0036] Graphene can absorb and radiate up to 40% of far-infrared radiation. The human body absorbs far-infrared radiation through the stretching vibrations of carbon-carbon, carbon-hydrogen, and oxygen-hydrogen bonds within the cellular molecules of human tissue. These resonant waves are mostly between 3 and 15 microns, matching the wavelength and amplitude of far-infrared radiation, causing resonance. The 8-15 micron far-infrared waves emitted by heated graphene can activate biomolecules such as nucleic acids and proteins in human cells and can also be used to promote plant growth.

[0037] The far infrared rays released by graphene when heated can radiate heat energy into the greenhouse in the form of far infrared rays, increasing the temperature in the greenhouse while promoting plant growth.

[0038] However, since the infrared radiation temperature of the graphene infrared radiation panel is correlated with the ambient temperature of the graphene infrared radiation panel, when the ambient temperature is below 0°C, the thermal radiation temperature of the graphene infrared radiation panel drops significantly. As the ambient temperature decreases, the downward trend of the thermal radiation temperature of the graphene infrared radiation panel intensifies, and the thermal radiation intensity of the graphene infrared radiation panel drops significantly.

[0039] In this embodiment, the space on both sides of the heat transfer ribs 12 is filled with a heat storage medium layer 13. The heat storage medium layer 13 can store the heat energy absorbed by the photothermal absorption plate 15 during the day, and the heat transfer ribs 12 can increase the heat transfer area between the photothermal absorption plate 15 and the heat storage medium layer 13. At night, after the sunlight disappears, by covering the thermal insulation cover 2, the loss of heat energy stored in the heat storage medium layer 13 can be greatly reduced. At this time, the heat energy stored in the heat storage medium layer 13 acts as a heat source and continues to provide heat energy for the graphene infrared radiation plate 11, so that the graphene infrared radiation plate 11 can continue to radiate heat energy to the interior of the greenhouse in the form of far-infrared rays through the internal graphene coating 113, thereby increasing the temperature inside the greenhouse and achieving the effect of auxiliary warming.

[0040] The present application overcomes the decrease in thermal radiation intensity of the graphene infrared radiation plate in a low temperature environment, and achieves the purpose of not attenuating the thermal radiation intensity of the graphene infrared radiation plate by increasing the local ambient temperature of the graphene infrared radiation plate.

[0041] Example 2:

[0042] This embodiment provides an optional solution for the specific structure of the heat radiation component 1 based on the first embodiment.

[0043] In this embodiment, if Figure 9 As shown, the graphene infrared radiation plate 11 also includes a rigid substrate 111, an insulating base film 112, an insulating interlayer 114 and a rigid clamping plate 115. The graphene coating 113 is arranged between the rigid substrate 111 and the rigid clamping plate 115. The two sides of the graphene coating 113 close to the rigid substrate 111 and the rigid clamping plate 115 are respectively covered with the insulating base film 112 and the insulating interlayer 114.

[0044] In this embodiment, specifically, the graphene coating 113 is sandwiched between the insulating base film 112 and the insulating interlayer 114 in a sealed film to form an insulating composite film. At the same time, the composite film is sandwiched between the interlayer formed by the rigid substrate 111 and the rigid clamping plate 115, thereby increasing the stiffness and strength of the graphene coating 113.

[0045] In this embodiment, specifically, the rigid substrate 111 and the rigid sandwich plate 114 are made of epoxy resin glass fiber board; the insulating base film 112 and the insulating sandwich film 114 are polyimide film or polyethylene terephthalate (PET) film.

[0046] In this embodiment, specifically, the light heat absorption plate 15 is an aluminum plate. The metal aluminum plate has good thermal conductivity. After the solar radiation heat is absorbed, it is quickly conducted to the heat storage medium layer 13. The heat storage medium layer 13 is made of paraffin or stearic acid.

[0047] In this embodiment, paraffin is preferably used for the heat storage medium layer 13. Paraffin is an excellent heat storage material with a specific heat capacity of 2.14 to 2.9 J·g·°C and a latent heat of fusion of 200 to 220 J·g. When melted, paraffin has a low vapor pressure, is less susceptible to chemical reactions, and exhibits excellent chemical stability. After multiple cycles of heat absorption and release, the phase transition temperature and latent heat of phase change change very little, and there is no phase separation or corrosiveness. As a bulk chemical raw material, paraffin is abundant, diverse, and inexpensive. However, the disadvantage of paraffin is its low thermal conductivity of only 0.150 W / (m·K), resulting in slow heat transfer. Heat transfer fins 1-22b are arranged in an array and immersed in paraffin. The thermal conductivity of aluminum is 238 W / (m·K), 1586 times that of paraffin. Heat transfer fins 12 have a large heat transfer area, and the paraffin filling heat transfer fins 1-22b forms a uniform heat conduction network, overcoming the problem of paraffin's low thermal conductivity.

[0048] In this embodiment, if Figure 7 As shown, the side of the light and heat absorption plate 15 away from the graphene infrared radiation plate 11 is covered with a carbon coating layer 151 .

[0049] In this embodiment, specifically, the carbon coating layer 151 includes a binder and a carbon material, wherein the binder accounts for 90 to 93 parts by weight and the carbon material accounts for 7 to 10 parts by weight.

[0050] In this embodiment, preferably, the weight portion of the binder is 93 parts, and the weight portion of the carbon material is 7 parts.

[0051] In this embodiment, specifically, the adhesive is acrylic resin emulsion or polyurethane coating, and the carbon material is one or a combination of two or more of graphite powder, carbon nanotubes and graphene.

[0052] In this embodiment, the adhesive is preferably an acrylic resin emulsion. Acrylic resin emulsions are high-molecular-weight, low-viscosity emulsions made primarily from acrylic esters (primarily methyl, ethyl, and butyl acrylates, and methyl and n-butyl methacrylates). They are generally multi-component copolymers with a solids content of 20% to 50%. Based on their molecular chain structure, they can be divided into: linear copolymer emulsions; copolymer emulsions containing functional groups (hydroxyl, carboxyl, and amino groups, etc.); and self-crosslinking or externally crosslinked copolymer emulsions. The resulting films exhibit properties such as brightness, flexibility, strong adhesion, and water and weather resistance. By selecting and adjusting the monomer ratio, the copolymer's properties and the film's hardness (soft, medium-hard, or hard) can be adjusted to meet different application requirements. They are prepared through emulsion copolymerization of an ester, a comonomer (which can be another acrylic phenol or other double-bond-containing monomer), an emulsifier, and an initiator. It has a wide range of uses. It can be used as a sizing agent, adhesive and thickener for fabrics; as a finishing agent, adhesive, brightener, tanning agent and filler for leather; and as a paper and wood treatment agent, building coatings, latex paint and resin mortar.

[0053] In this embodiment, preferably, the carbon material is graphene.

[0054] In this embodiment, the heat transfer rib 12 is a Z-shaped plate, one end of which is connected to the photothermal absorption plate 15, and the other end is close to the graphene infrared radiation plate 11. By setting the heat transfer rib 12 as a Z-shaped plate, the contact area between the heat transfer rib 12 and the heat storage medium layer 13 can be effectively increased, and the heat energy storage speed of the heat storage medium layer 13 can be accelerated during the day when the sun is shining; at night, when the heat storage medium layer 13 is used as a heat source, the larger the contact area, the more sufficient heat energy can be transferred to the graphene infrared radiation plate 11, thereby causing the graphene coating 113 to be heated, generating far infrared rays, and radiating heat energy.

[0055] Example 3:

[0056] This embodiment provides another optional solution for the specific structure of the heat radiation component 1 based on any of the above embodiments.

[0057] In this embodiment, if Figure 6 and Figure 8 As shown, both ends of the light and heat absorption plate 15 and the graphene infrared radiation plate 11 are clamped on the clamping member 14 .

[0058] In this embodiment, if Figure 8 As shown, a first clamping groove 141 is provided on the top of the clamping member 14, and a second clamping groove 142 is provided on the bottom. The two ends of the photothermal absorption plate 15 are clamped in the first clamping groove 141, and the two ends of the graphene infrared radiation plate 11 are clamped in the second clamping groove 142. By providing the clamping member 14, the installation structure of the photothermal absorption plate 15 and the graphene infrared radiation plate 11 can be made more stable.

[0059] Example 4:

[0060] This embodiment provides another optional solution for the specific structure of the heat transfer ribs 12 based on any of the above embodiments.

[0061] In this embodiment, the heat transfer ribs 12 are S-shaped. The S-shaped heat transfer ribs 12 have a larger contact area with the heat storage medium in the heat storage medium layer 13 , which can increase the heat transfer efficiency of the heat transfer ribs 12 .

[0062] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A graphene radiation enhancement device for a greenhouse, comprising a box body and a heat-insulating cover (2), wherein the heat-insulating cover (2) is movably mounted on the top of the box body, and a heat radiation component (1) is mounted in the box body, characterized in that: The heat radiation assembly (1) comprises a light heat absorption plate (15), a heat transfer rib (12), a heat storage medium layer (13) and a graphene infrared radiation plate (11), wherein the light heat absorption plate (15) is located between the heat insulation cover (2) and the graphene infrared radiation plate (11), a plurality of heat transfer ribs (12) are evenly arranged on the light heat absorption plate (15), and both sides of each heat transfer rib (12) are filled with a heat storage medium layer (13), and one end of the heat storage medium layer (13) away from the light heat absorption plate (15) is connected to the graphene infrared radiation plate (11), the graphene infrared radiation plate (11) is connected to a power supply, and the graphene infrared radiation plate (11) is used to radiate heat energy to the greenhouse; The graphene infrared radiation plate (11) comprises a rigid substrate (111), an insulating base film (112), a graphene coating (113), an insulating interlayer (114) and a rigid clamping plate (115); the graphene coating (113) is arranged between the rigid substrate (111) and the rigid clamping plate (115); and the two sides of the graphene coating (113) close to the rigid substrate (111) and the rigid clamping plate (115) are respectively covered with the insulating base film (112) and the insulating interlayer (114); The heat transfer rib plate (12) is a Z-shaped plate, one end of which is connected to the light and heat absorption plate (15), and the other end of which is close to the graphene infrared radiation plate (11).

2. A graphene radiation enhancement device for a greenhouse according to claim 1, characterized in that: The light and heat absorption plate (15) is an aluminum plate.

3. The graphene radiation enhancement device for a greenhouse according to claim 1, characterized in that: The side of the light and heat absorption plate (15) away from the graphene infrared radiation plate (11) is covered with a carbon coating layer (151).

4. The graphene radiation enhancement device for a greenhouse according to claim 3, characterized in that: The carbon coating layer (151) comprises an adhesive and a carbon material, wherein the weight portion of the adhesive is 90 to 93 parts, and the weight portion of the carbon material is 7 to 10 parts.

5. The graphene radiation enhancement device for a greenhouse according to claim 4, characterized in that: The weight portion of the adhesive is 93 parts, the weight portion of the carbon material is 7 parts, the adhesive is acrylic resin emulsion or polyurethane coating, and the carbon material is one or a combination of two or more of graphite powder, carbon nanotubes and graphene.

6. The graphene radiation enhancement device for a greenhouse according to claim 1, characterized in that: The heat storage medium layer (13) is paraffin wax.

7. The graphene radiation enhancement device for a greenhouse according to claim 1, characterized in that: The heat storage medium layer (13) is made of stearic acid.

8. The graphene radiation enhancement device for a greenhouse according to claim 1, characterized in that: The heat-insulating cover (2) comprises a heat-insulating cover shell and a heat-insulating filling layer, wherein the heat-insulating filling layer fills the entire inner cavity of the heat-insulating cover shell, and the heat-insulating filling layer is made of rubber heat-insulating material.

9. The graphene radiation enhancement device for a greenhouse according to claim 1, characterized in that: The box body and the heat-insulating cover (2) are hingedly connected, and both sides of the outer wall of the box body are provided with hanging support ears (4), and the hanging support ears (4) are used to install the box body on the top of the greenhouse.

Images