Greenhouse heat preservation and dehumidification water return system

Abstract

The invention relates to the technical field of agricultural engineering, and provides a greenhouse heat preservation, dehumidification and water return system which comprises a greenhouse, a culture medium and a dehumidification device, and the culture medium is arranged at the bottom in the greenhouse and used for planting crops; the dehumidification device is hung in the greenhouse; the dehumidification device comprises a tank with a containing cavity, a semiconductor module and a power source, the semiconductor module is arranged in the tank and divides the containing cavity into a first containing cavity and a second containing cavity which are communicated with each other, the first containing cavity is located below the second containing cavity, an air inlet is formed in the top of the second containing cavity, and a water outlet is formed in the bottom of the first containing cavity. The water outlet is communicated with the culture medium through a drainage pipeline; the semiconductor module comprises a cold-end semiconductor and a hot-end semiconductor, the cold-end semiconductor and the hot-end semiconductor are electrically connected with the two ends of the power source respectively, and the cold-end semiconductor is located in the first containing cavity and used for condensing steam in air into water; the hot end semiconductor is located in the second containing cavity and used for releasing heat to heat air.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural engineering, and in particular to a greenhouse heat preservation, dehumidification and water return system. Background Art

[0002] Agricultural greenhouses are an advanced agricultural engineering technology that aims to adjust natural light and temperature conditions through artificial means, optimize the growth environment of plants and animals, and achieve all-weather growth. Such facilities include environmentally safe greenhouses, livestock and poultry houses, mushroom houses, etc. The core is to efficiently use specific covering materials to meet the needs of different seasons: high transparency and high thermal insulation in cold seasons, focusing on cooling and moss prevention in summer, and converting useless light waves in sunlight into light waves suitable for photosynthesis, and having good dust and pollution resistance.

[0003] The application of modern technology in solar greenhouses has significantly improved the growth environment of crops. By precisely controlling key factors such as temperature, light, water, humidity, carbon dioxide concentration and nutrients, solar greenhouses provide ideal growth conditions for crops, especially in cold northern regions, effectively reducing the impact of seasonality on agricultural production. However, the management of temperature and humidity is particularly critical because different crops have different requirements for these two factors. For example, beans and melons are more sensitive to high humidity and low temperatures, and are susceptible to cold damage and diseases. In addition, if the carbon dioxide concentration in the greenhouse is not replenished in time during the day, it will drop significantly, which will affect the photosynthesis of crops.

[0004] The design and construction of a solar greenhouse requires comprehensive consideration of multiple factors, such as span, height, front and rear roof angles, wall thickness, and horizontal projection length of the rear roof, in order to maximize the collection and storage of solar energy and ensure good insulation at night. Temperature control technology plays an important role in greenhouses because each crop has its own suitable growth temperature range. Higher temperatures during the day are conducive to photosynthesis and respiration, while lower temperatures at night can reduce the consumption of organic matter by respiration.

[0005] Curved greenhouses are designed to improve the efficiency of indoor and outdoor air exchange, and are usually equipped with large and widely distributed vents. In addition to natural convection ventilation, forced convection ventilation can also be achieved through fans to enhance air circulation. However, in the northern winter, direct ventilation with the external environment can cause rapid changes in indoor temperature and increase the risk of crop frostbite. If the vents are not properly insulated, the cold air directly contacting the crops may also cause tissue damage, affecting yield and quality. Summary of the invention

[0006] The invention provides a greenhouse heat preservation and dehumidification return water system, which is used to solve the problem in the prior art that the greenhouse heating and dehumidification effect is poor and the temperature and humidity in the greenhouse cannot be adjusted simultaneously, resulting in crop damage.

[0007] The present invention provides a greenhouse heat preservation, dehumidification and water return system, comprising: a greenhouse and a culture medium, wherein the culture medium is placed at the bottom of the greenhouse for planting crops; a dehumidification device, which is suspended in the greenhouse; the dehumidification device comprises a tank body with a accommodating cavity, a semiconductor module and a power supply, wherein the semiconductor module is arranged in the tank body to divide the accommodating cavity into a first accommodating cavity and a second accommodating cavity which are interconnected, wherein the first accommodating cavity is located below the second accommodating cavity, an air inlet is arranged at the top of the second accommodating cavity, and a water outlet is arranged at the bottom of the first accommodating cavity, wherein the water outlet is connected to the culture medium through a drainage pipeline; the semiconductor module comprises a cold-end semiconductor and a hot-end semiconductor, wherein the cold-end semiconductor and the hot-end semiconductor are electrically connected to two ends of the power supply respectively, the cold-end semiconductor is located in the first accommodating cavity, and is used to condense water vapor in the air into water; the hot-end semiconductor is located in the second accommodating cavity, and is used to release heat to heat the air.

[0008] According to a greenhouse insulation, dehumidification and return water system provided by the present invention, a frame is provided on the top of the greenhouse, and the frame is arranged to be inclined downward from the north wall to the south wall of the greenhouse; there are multiple dehumidification devices, and the multiple dehumidification devices are arranged at intervals along the extension direction of the frame.

[0009] According to a greenhouse insulation dehumidification and return water system provided by the present invention, the dehumidification device also includes a first heat exchange fin and a second heat exchange fin, the first heat exchange fin is arranged below the cold end semiconductor, and the second heat exchange fin is arranged above the hot end semiconductor.

[0010] According to a greenhouse insulation, dehumidification and return water system provided by the present invention, the first heat exchange fin includes a first connecting part and a first heat exchange part, the first connecting part is connected to the cold end semiconductor, the first heat exchange part is connected to the first connecting part, and the first heat exchange part extends in a direction away from the hot end semiconductor; the second heat exchange fin includes a second connecting part and a second heat exchange part, the second connecting part is connected to the hot end semiconductor, the second heat exchange part is connected to the second connecting part, and the second heat exchange part extends in a direction away from the cold end semiconductor.

[0011] According to a greenhouse thermal insulation, dehumidification and water return system provided by the present invention, the length of the second heat exchange part is greater than the length of the first heat exchange part.

[0012] According to a greenhouse thermal insulation, dehumidification and water return system provided by the present invention, a vent hole is provided on the lower side wall of the tank body, and the vent hole is communicated with the first accommodating cavity.

[0013] A greenhouse insulation dehumidification and return water system provided according to the present invention also includes a water collecting and dehumidification layer and a water guide member, the water collecting and dehumidification layer is arranged on the frame, a liquid collecting pipe is arranged at the bottom of the greenhouse, and the lowest end of the water collecting and dehumidification layer is connected to the water inlet of the liquid collecting pipe through the water guide member.

[0014] According to a greenhouse insulation dehumidification and return water system provided by the present invention, the water collection and dehumidification layer includes a main body, a flap and a supporting membrane, the flap is connected to the frame, the supporting membrane is arranged on the flap, and the main body is arranged on the supporting membrane.

[0015] A greenhouse thermal insulation, dehumidification and return water system provided according to the present invention also includes a waterproof thermal insulation layer, which is covered on the water collection and dehumidification layer; and / or the waterproof thermal insulation layer and the water collection and dehumidification layer are an integrally formed part.

[0016] A greenhouse insulation, dehumidification and return water system provided according to the present invention also includes a water storage tank and a water pump. An outlet is provided at the bottom of the greenhouse, the outlet is connected to the liquid collecting pipe, the inlet of the water pump is connected to the outlet, and the outlet of the water pump is connected to the inlet of the water storage tank.

[0017] The greenhouse insulation dehumidification and return water system provided by the present invention arranges semiconductor modules in the greenhouse to perform dehumidification and heating in a physical manner, thereby maintaining a suitable temperature and humidity in the greenhouse and protecting the ecological balance in the greenhouse, thereby increasing the crop yield in the solar greenhouse in cold regions; the water outlet is connected to the culture medium through a drainage pipeline, and the condensed water formed by dehumidification can be recycled into the culture medium for reuse, thereby saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a cross-sectional view of the greenhouse thermal insulation, dehumidification and water return system provided by the present invention; Figure 2 is a cross-sectional schematic diagram of a dehumidification device provided by the present invention; Figure 3 yes Figure 2 Schematic diagram of the cross section at AA in the middle; Figure 4 is a top view of the water collection and dehumidification layer provided by the present invention; Figure 5 It is a schematic diagram of the microstructure of the water collection and dehumidification layer provided by the present invention; Reference numerals: 1. Greenhouse; 11. South wall; 12. North wall; 13. Insulation; 14. Frame; 15. Liquid collecting pipe; 2. Culture medium; 3. Dehumidification device; 31. Tank; 311. First accommodating chamber; 312. Second accommodating chamber; 313. Water outlet; 314. Ventilation hole; 315. Wire channel; 32. Cold end semiconductor; 33. Hot end semiconductor; 34. Power supply; 35. Lifting bracket; 36. First heat exchange fin; 361. First connecting part; 362. First heat exchange part; 37. Second heat exchange fin; 371. Second connecting part; 372. Second heat exchange part; 4. Drainage pipeline; 5. Water collection and dehumidification layer; 51. Main body; 52. Lap; 53. Support membrane; 6. Water diversion parts; 7. Waterproof and thermal insulation layer; 8. Water pump; 9. Water storage tank. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the examples of various specific processes and materials provided by the present invention, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0026] In the field of greenhouse environmental control, there are many strategies for heating and dehumidifying, such as solar collectors, geothermal heat exchange devices, north wall heat storage and release, internal circulation dehumidification equipment, natural and mechanical ventilation, ground film covering, and temperature and humidity control irrigation. However, each of these technologies has limitations: solar collectors are inefficient when there is insufficient light; geothermal heat exchange devices affect indoor air quality and have high energy consumption; north wall heat storage and release have limited effects on dehumidification; internal circulation dehumidification equipment is relatively expensive; and ventilation methods may cause temperature drops and increase the risk of crop chilling damage. Ground film covering requires optimized design to prevent moisture retention, while temperature and humidity control irrigation requires meticulous management. Based on this, an embodiment of the present invention proposes a greenhouse insulation dehumidification and return water system.

[0027] Combine the following Figure 1-Figure 5 The greenhouse heat preservation, dehumidification and water return system of the present invention is described.

[0028] The greenhouse heat preservation, dehumidification and water return system includes: a greenhouse 1, a culture medium 2 and a dehumidification device 3. The greenhouse 1 has a double-layer light-transmitting structure. Figure 1As shown, the greenhouse 1 includes a south wall 11 and a north wall 12. The north wall 12 has a vertical portion and an inclined portion. The inclined portion is connected to the top of the vertical portion and is inclined toward the south wall 11. The south wall 11 is a curved structure. The top of the south wall 11 is connected to the end of the inclined portion. The bottom of the south wall 11 is connected to the bottom surface of the greenhouse 1 and is in the same plane as the bottom surface of the vertical portion. The culture medium 2 is placed at the bottom of the greenhouse 1. It is a container for temporarily storing water and is used to grow crops to provide the required water and nutrients for plant growth. The culture medium 2 is arranged in the greenhouse 1 according to a certain row spacing. In one embodiment, the length direction of the culture medium 2 is perpendicular to the north wall 12.

[0029] The outer wall surface of the south wall 11 is provided with an insulation member 13, which has excellent thermal insulation performance and provides a barrier for the greenhouse 1 to be isolated from the external low temperature environment. The insulation member 13 has high light transmittance, ensuring that sunlight can effectively penetrate and promote the photosynthesis of plants, while effectively blocking the heat inside the greenhouse 1 from being lost to the external environment through conduction, convection and radiation. The working principle of the insulation member 13 is based on heat transfer in thermodynamics. By reducing the heat exchange rate between the greenhouse 1 and the outside world, the indoor temperature is maintained stable, thereby creating a suitable temperature and continuous growth conditions for plant growth.

[0030] The dehumidifier 3 is suspended in the greenhouse 1. The top of the dehumidifier 3 can be connected to the top of the greenhouse 1, such as the dehumidifier 3 is connected to the frame 14 at the top of the greenhouse 1. Figure 1 and Figure 2 As shown, the dehumidification device 3 includes a tank body 31 having a receiving cavity, a semiconductor module and a power supply 34. The top of the tank body 31 can be connected to the top of the greenhouse 1 through a hanging bracket 35. Figure 4 and Figure 5 As shown, the hanging bracket 35 includes a plurality of connecting members and hooks. The plurality of connecting members are arranged at intervals along the circumference of the tank body 31. One end of each connecting member is connected to the inner wall of the tank body 31, and the other end of each connecting member is connected to the hook. The hook is a fixed point, so that the tank body 31 is hung on the top of the greenhouse 1. The semiconductor module and the power supply 34 are both arranged in the tank body 31. Figure 1 As shown, the semiconductor module is disposed in the can body 31, and the accommodating cavity is divided into a first accommodating cavity 311 and a second accommodating cavity 312. The first accommodating cavity 311 is located below the second accommodating cavity 312, and the first accommodating cavity 311 and the second accommodating cavity 312 are connected. Figure 2 As shown, there is a distance between the semiconductor module and the inner wall surface of the accommodation cavity to achieve communication between the first accommodation cavity 311 and the second accommodation cavity 312 .

[0031] The embodiment of the present invention realizes cooling and heating through semiconductor modules, thereby condensing and heating the high-humidity air in the greenhouse 1, thereby improving the growth environment of plants. Figure 2 and Figure 3As shown, the semiconductor module includes a cold-end semiconductor 32 and a hot-end semiconductor 33, which are respectively connected to the positive and negative electrodes of a power source 34, and a temperature difference can be generated at both ends when current passes through. The power source 34 is arranged at the bottom of the tank 31, and a wire channel 315 is arranged on the side wall of the tank 31, as shown in FIG. Figure 3 As shown, it is used to place the wires drawn from the cold end semiconductor 32 and the hot end semiconductor 33 to ensure the stability of power transmission. The power source 34 can be a battery. When the battery is insufficient, it can be removed to charge the battery.

[0032] Among them, the cold end semiconductor 32 is located in the first accommodating chamber 311, and the hot end semiconductor 33 is located in the second accommodating chamber 312. The top of the second accommodating chamber 312 is provided with an air inlet, and the gas in the greenhouse 1 can enter the first accommodating chamber 311 and the second accommodating chamber 312 through the air inlet. The cold end semiconductor 32 absorbs heat in the air under the action of the current, so that the temperature of the air flowing through is reduced to below the dew point, and the water vapor condenses into water droplets. The bottom of the first accommodating chamber 311 is provided with a water outlet 313, and the water outlet 313 is connected to the culture medium 2 through the drainage pipe 4. The water condensed by the cold end semiconductor 32 can be recycled into the culture medium 2 through the water outlet 313 and the drainage pipe 4, providing the necessary moisture and nutrition for plant growth. At the same time, the hot end semiconductor 33 releases heat to heat the air above, thereby increasing the air temperature while dehumidifying, and optimizing the temperature and humidity required for plant growth. The hot air heated by the hot end semiconductor 33 gathers near the plant canopy because of its low density, forming a thermal insulation layer.

[0033] It should be noted that the drainage pipe 4 is a hose, which can be made of a deformable soft material, and can not only introduce water in the dehumidification device into the culture medium 2, but also provide a place for the climbing plants in the greenhouse 1 to grow. In addition, a seal is provided at the connection between the drainage pipe 4 and the water outlet 313 to prevent leakage.

[0034] The greenhouse insulation dehumidification and return water system provided in the embodiment of the present invention, by arranging a semiconductor module in the greenhouse 1, adopts physical methods to perform dehumidification and heating, maintains suitable temperature and humidity in the greenhouse 1, protects the ecological balance in the greenhouse 1, and thus improves the crop yield in the solar greenhouse in cold regions; the water outlet 313 is connected to the culture medium 2 through the drainage pipe 4, and the condensed water formed by dehumidification can be recycled into the culture medium 2 for reuse, saving resources.

[0035] The first accommodating chamber 311 in the embodiment of the present invention includes a main body and a collecting portion. The collecting portion is arranged at the bottom of the main body, and the water outlet 313 is arranged at the bottom of the collecting portion. The cross-sectional area of ​​the collecting portion gradually decreases from the bottom of the main body to the bottom of the collecting portion, so that the condensed water formed in the second accommodating chamber 312 can be quickly collected and recovered into the culture medium 2 through the water outlet 313.

[0036] In order to improve the dehumidification and heating effects in the greenhouse 1, the dehumidification device 3 in the embodiment of the present invention is multiple, and the multiple dehumidification devices 3 are arranged at intervals along the north wall 12 to the south wall 11. Specifically, a frame 14 is provided on the top of the greenhouse 1, and the frame 14 is arranged downwardly inclined from the north wall 12 to the south wall 11 of the greenhouse 1, and the multiple dehumidification devices 3 are arranged at intervals along the extension direction of the frame 14.

[0037] Because the north wall 12 retains a certain amount of heat under the action of sunlight during the day and releases it at night, the area near the north wall 12 has a higher temperature and a lower relative humidity. In addition, the plants are planted at a higher density in the southern part of the greenhouse 1, and the transpiration effect of the plants produces more water vapor, so the relative humidity is higher. In addition, the southern part of the greenhouse 1 is smaller than the space near the north wall 12, making it difficult to evenly distribute the water vapor produced by the plants by convection. In addition, there are fewer parts between the southern part of the greenhouse 1 and the external environment, making the temperature in this area lower. Therefore, in the northern winter, there is a high humidity area inside the greenhouse 1, located above the southern part of the greenhouse 1, such as Figure 1 As shown. Based on this, the dehumidification device 3 in the embodiment of the present invention can be arranged biased towards the upper south of the greenhouse 1 to strengthen the dehumidification of the high humidity area of ​​the greenhouse 1 and improve the dehumidification efficiency of the overall system. For example, the number of dehumidification devices 3 near the south wall 11 of the greenhouse 1 is greater than the number at the north wall 12 of the greenhouse 1. Near the south wall 11 of the greenhouse 1, there is a first spacing between two adjacent dehumidification devices 3; near the north wall 12 of the greenhouse 1, there is a second spacing between two adjacent dehumidification devices 3, and the second spacing is smaller than the first spacing.

[0038] The dehumidification device 3 also includes a first heat exchange fin 36 and a second heat exchange fin 37. The first heat exchange fin is arranged below the cold end semiconductor 32 and can be connected to the cold end semiconductor 32 through thermal conductive silicone grease to reduce its contact resistance and improve the heat exchange efficiency. The temperature of the first heat exchange fin 36 is lower than the temperature of the air below it, and forms convection heat exchange with the air in the greenhouse 1. After the air in the greenhouse 1 flows through the surface of the first heat exchange fin 36, the temperature drops below the dew point temperature, and many small water droplets are formed on the surface of the first heat exchange fin 36 and attached to the surface of the first heat exchange fin 36. Due to the action of gravity, the water droplets gather at the bottom and are recovered to the culture medium 2 through the water outlet 313. The second heat exchange fin 37 is arranged above the hot end semiconductor 33 and can be connected to the hot end semiconductor 33 through thermal conductive silicone grease to reduce its contact resistance and improve the heat exchange efficiency. The temperature of the second heat exchange fins 37 is higher than that of the air in the greenhouse 1 above, and convection heat exchange is formed with the air in the greenhouse 1. The heat emitted by the second heat exchange fins 37 can heat the air in the greenhouse 1 to a certain extent, optimize the planting environment in the greenhouse 1, and increase crop yields.

[0039] like Figure 2As shown, the first heat exchange fin 36 includes a first connection part 361 and a first heat exchange part 362. The first connection part 361 is connected to the cold end semiconductor 32, and the first heat exchange part 362 is connected to the first connection part 361. The first connection part 361 extends in a direction away from the hot end semiconductor 33 to increase the contact area and improve the heat exchange efficiency. The small water droplets formed on the first heat exchange part 362 gather to the bottom and fall under the action of gravity. Optionally, there are multiple first heat exchange parts 362, and the multiple first heat exchange parts 362 are arranged at intervals along the extension direction of the first connection part 361.

[0040] The second heat exchange fin 37 includes a second connection portion 371 and a second heat exchange portion 372. The second connection portion 371 is connected to the hot end semiconductor 33, and the second heat exchange portion 372 is connected to the second connection portion 371. The second connection portion 371 extends in a direction away from the cold end semiconductor to increase the contact area and improve the heat exchange efficiency. Optionally, there are multiple second heat exchange portions 372, and the multiple second heat exchange portions 372 are arranged at intervals along the extension direction of the second connection portion 371.

[0041] In the present invention, the length of the second heat exchange part 372 is greater than that of the first heat exchange part 362, which can increase the heat dissipation area, increase the power of hot air rising, and help form a more effective convection cycle to compensate for the imbalance of convection heat exchange.

[0042] The first heat exchange fins 36 and the second heat exchange fins 37 in the embodiment of the present invention are not limited to the above structures, and may also be heat exchange structures such as rotating fins, serrated fins, porous fins and heat pipes.

[0043] Considering the rigidity requirement of the tank body 31, the present invention provides a vent hole 314 on the lower side wall of the tank body 31, and the vent hole 314 is connected to the first accommodating chamber 311 for ventilation and heat exchange, which not only helps heat exchange, but also protects the side wall of the tank body 31 and reduces damage to the tank body 31 due to temperature difference. In one embodiment, the vent holes 314 are provided in multiple rows, and the multiple rows of vent holes are arranged at intervals along the height direction of the tank body 31. Each row includes multiple vent holes 314, and the multiple vent holes 314 are arranged at intervals along the circumference of the tank body 31.

[0044] The greenhouse insulation dehumidification and return water system provided by the embodiment of the present invention also includes a water collecting and dehumidification layer 5 and a water guide member 6. The water collecting and dehumidification layer 5 is arranged on the frame 14. Since the frame 14 is arranged to be inclined downward from the north wall 12 of the greenhouse 1 to the south wall 11 of the greenhouse 1, that is, the water collecting and dehumidification layer 5 is arranged to be inclined downward from the north wall 12 of the greenhouse 1 to the south wall 11 of the greenhouse 1. When there is high-humidity air in the greenhouse 1, the air adheres to the water collecting and dehumidification layer 5 after passing through the water collecting and dehumidification layer 5, and flows along the water collecting and dehumidification layer 5 to the lowest end of the water collecting and dehumidification layer 5.

[0045] A liquid collecting pipe 15 is provided at the bottom of the greenhouse 1. The water inlet of the liquid collecting pipe 15 is connected to the water collecting and dehumidifying layer 5 through a water guide 6. The water guide 6 is used to guide the water collected by the water collecting and dehumidifying layer 5 to flow to the liquid collecting pipe 15 at the bottom. In one embodiment, the water guide 6 is an arc-shaped structure, and the width of the arc-shaped structure is greater than or equal to the width of the water collecting and dehumidifying layer 5, ensuring that the water at the bottom of the water collecting and dehumidifying layer 5 can flow into the liquid collecting pipe 15 through the water guide 6, be collected and transferred, thereby effectively reducing the humidity in the greenhouse 1 and providing a drier growth environment for the plants.

[0046] In one embodiment, a water trough below the ground level is provided at the end away from the north wall 12 to collect water droplets sliding down from the water guide member 6; one or more parallel liquid collecting pipes 15 perpendicular to the north wall 12 are provided at the middle end of the greenhouse 1, and the liquid collecting pipes 15 are connected to the water trough.

[0047] like Figure 4 As shown, the water collection and dehumidification layer 5 includes a body 51, a strap 52 and a supporting membrane 53. The strap 52 is fixedly connected to the frame 14, the supporting membrane 53 is arranged on the strap 52, and the body 51 is arranged on the supporting membrane 53. Figure 5 As shown, the main body 51 is a spider web-like structure, which forms a large number of tiny protrusions or fibers on the surface of the membrane, greatly increasing the surface area in contact with the air. The main body 51 can be composed of a spunbonded high-density polyethylene film as an integral structure, a perforated / microporous film composite structure, or a coated waterproof and breathable membrane. When the humid air in the greenhouse 1 passes through the water collection and dehumidification layer 5, the fibers on these microstructures are like countless tiny condensation nuclei, causing water vapor molecules to condense into visible water droplets. Due to the small pores of the spider web-like structure, water molecules in the high-humidity air are adsorbed on the main body 51, gradually forming small water droplets to achieve dehumidification. The supporting membrane 53 is a high-density belt with dual functions of penetration and support, ensuring that the main body 51 is always in a fully open state without affecting its water penetration.

[0048] The water-collecting and dehumidifying layer 5 in the embodiment of the present invention is a transparent structural member, and light can be irradiated to the crops in the greenhouse 1 through the water-collecting and dehumidifying layer 5 .

[0049] The greenhouse heat preservation and dehumidification return water system also includes a waterproof heat preservation layer 7, which is covered on the water collection and dehumidification layer 5 and matches the water collection and dehumidification layer 5 to form a double layer protection. The waterproof heat preservation layer 7 mainly ensures that the water vapor in the greenhouse 1 does not float further, so that the water vapor is concentrated and restricted near the water collection and dehumidification layer 5, fully collects water, and can also inhibit the heat in the greenhouse 1 from spreading to the outside.

[0050] In one embodiment, the water-collecting and dehumidifying layer 5 and the waterproof and heat-insulating layer 7 can be an integrally formed part. For example, they can be formed by a lamination process, and are cooled after being stamped under high temperature and high pressure, without adding adhesive therein, so as to ensure that their light transmittance is not affected, and they have certain strength and aging resistance, and can work for a long time when there is a temperature difference between the inside and the outside. It should be noted that the waterproof and heat-insulating layer 7 also has the same flap 52 as the water-collecting and dehumidifying layer 5, which is used to adjust its tension.

[0051] The waterproof and heat-insulating layer 7 in the present invention is a transparent structural member, and light can be irradiated to the crops in the greenhouse 1 through the waterproof and heat-insulating layer 7 .

[0052] The greenhouse insulation dehumidification return water system in the embodiment of the present invention also includes a water storage tank 9 and a water pump 8. An outlet is provided at the bottom of the greenhouse 1, and the outlet is connected to the liquid collecting pipe 15. The inlet of the water pump 8 is connected to the outlet of the greenhouse, and the outlet of the water pump 8 is connected to the inlet of the water storage tank 9. The water in the liquid collecting pipe 15 can be transported to the water storage tank 9 for storage.

[0053] In one embodiment, a water tank can be provided near the outlet of the tank body 31, and the water tank is connected to the liquid collecting pipe 15. When the water level in the water tank is equal to or higher than the outlet of the greenhouse 1 (higher than the inlet of the water pump 8), the water pump 8 starts to work and pumps water into the water storage tank 9 for storage. The water storage tank 9 is used to collect water transmitted through the liquid collecting pipe 15, and provides a temporary storage device for subsequent water resource reuse or treatment. In an optional embodiment, the water storage tank 9 is provided on the north wall 12 of the greenhouse 1.

[0054] The installation of the water tank 9 needs to be done on a flat and stable ground. Tools such as wrenches and screwdrivers are required during installation. A suitable bracket is installed according to the size of the water tank 9 to ensure that it is stable and reliable. At the same time, the connection between the water pump 8 and the water tank 9 must also ensure sealing to prevent water leakage. There are many options for the material of the water tank 9, such as stainless steel, plastic, etc. Users can choose the appropriate material according to their needs and budget.

[0055] The water pump 8 transfers the water in the liquid collecting pipe 15 to the water storage tank 9, providing the power required for water collection and transfer. The installation position of the water pump 8 should meet the requirements of the allowable vacuum height, ensure that the foundation is level and stable, and the rotation direction of the power machinery is consistent with the rotation direction of the water pump 8. During installation, the sealing must be ensured, and the use of elbows and gate valves must be reduced to avoid air accumulation. When the water pump 8 and the power machine are connected by shafts, the shaft centers should be in the same straight line to prevent vibration and single-sided wear of the bearings during operation.

[0056] The greenhouse insulation dehumidification and water return system provided by the embodiment of the present invention can solve the problem that most curved greenhouses are difficult to dehumidify and heat. Compared with ventilation through opening windows, it can avoid crop frost damage. The dehumidification device 3 uses the Peltier effect to condense and heat the air, and the generated water is transported to the culture medium 2 through the drainage pipe 4 to provide the necessary moisture and nutrients for the crops, thereby realizing water recycling. The waterproof insulation layer 7 works together with the insulation part 13 outside the greenhouse 1 to isolate the external low temperature environment, reduce heat loss, and maintain a constant temperature environment in the greenhouse 1. The special microstructure of the water collection and dehumidification layer 5 can effectively capture water molecules in the air, form water droplets and gather in the liquid collection pipe 15 to achieve air dehumidification. The water is transferred from the liquid collection pipe 15 to the water storage tank 9 by the water pump 8. The water storage tank 9 is a temporary water storage unit.

[0057] The present invention realizes efficient control of the internal environment of the greenhouse 1 through the linkage of a series of devices to promote the growth of crops, while saving energy and improving the utilization rate of resources. The greenhouse 1 can be heated and dehumidified without opening windows for ventilation, thereby improving the yield and water recovery rate of the solar greenhouse 1 in cold regions.

[0058] The embodiment of the present invention uses physical methods to perform dehumidification and heating, avoiding the use of chemical dehumidifiers and reducing the potential pollution of chemicals to the environment. The present invention can maintain a suitable temperature and humidity in the greenhouse 1. The system helps to create a healthier plant growth environment, reduce the occurrence of pests and diseases, thereby reducing the use of pesticides, protecting the ecological balance in the greenhouse 1, and promoting environmental sustainability. The recycling and reuse of water resources in the present invention not only saves fresh water resources, but also reduces dependence on external water resources. By collecting and reusing the water in the greenhouse 1, the demand for fresh water resources is reduced.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A greenhouse insulation dehumidification water return system, characterized in that: include: A greenhouse and a culture medium, wherein the culture medium is placed at the bottom of the greenhouse and is used for growing crops; A dehumidification device is suspended in the greenhouse; the dehumidification device comprises a tank body with a receiving cavity, a semiconductor module and a power supply, the semiconductor module is arranged in the tank body to divide the receiving cavity into a first receiving cavity and a second receiving cavity which are interconnected, the first receiving cavity is located below the second receiving cavity, an air inlet is arranged at the top of the second receiving cavity, a water outlet is arranged at the bottom of the first receiving cavity, and the water outlet is connected to the culture medium through a drainage pipeline; The semiconductor module includes a cold-end semiconductor and a hot-end semiconductor, which are electrically connected to the two ends of the power supply respectively. The cold-end semiconductor is located in the first accommodating cavity and is used to condense water vapor in the air into water; the hot-end semiconductor is located in the second accommodating cavity and is used to release heat to heat the air.

2. The greenhouse insulation dehumidification water return system according to claim 1 is characterized in that: A frame is provided on the top of the greenhouse, and the frame is arranged to be inclined downward from the north wall to the south wall of the greenhouse; there are multiple dehumidification devices, and the multiple dehumidification devices are arranged at intervals along the extension direction of the frame.

3. The greenhouse insulation dehumidification water return system according to claim 1 is characterized in that: The dehumidification device further includes a first heat exchange fin and a second heat exchange fin, wherein the first heat exchange fin is disposed below the cold-end semiconductor, and the second heat exchange fin is disposed above the hot-end semiconductor.

4. The greenhouse insulation dehumidification water return system according to claim 3 is characterized in that: The first heat exchange fin comprises a first connecting portion and a first heat exchange portion, the first connecting portion is connected to the cold end semiconductor, the first heat exchange portion is connected to the first connecting portion, and the first heat exchange portion extends in a direction away from the hot end semiconductor; The second heat exchange fin comprises a second connecting portion and a second heat exchange portion, the second connecting portion is connected to the hot end semiconductor, the second heat exchange portion is connected to the second connecting portion, and the second heat exchange portion extends in a direction away from the cold end semiconductor.

5. The greenhouse insulation dehumidification water return system according to claim 4 is characterized in that: The length of the second heat exchange portion is greater than the length of the first heat exchange portion.

6. The greenhouse insulation dehumidification water return system according to claim 1 is characterized in that: A vent hole is provided on the lower side wall of the tank body, and the vent hole is communicated with the first accommodating cavity.

7. The greenhouse insulation dehumidification water return system according to claim 2 is characterized in that: It also includes a water collecting and dehumidifying layer and a water guide member. The water collecting and dehumidifying layer is arranged on the frame. A liquid collecting pipe is arranged at the bottom of the greenhouse. The lowest end of the water collecting and dehumidifying layer is connected with the water inlet of the liquid collecting pipe through the water guide member.

8. The greenhouse thermal insulation, dehumidification and water return system according to claim 7, characterized in that: The water collection and dehumidification layer comprises a main body, a strap and a supporting membrane, the strap is connected to the frame, the supporting membrane is arranged on the strap, and the main body is arranged on the supporting membrane.

9. The greenhouse insulation dehumidification water return system according to claim 7, characterized in that: It also includes a waterproof and thermal insulation layer, which is covered on the water collection and dehumidification layer; And / or, the waterproof and heat-insulating layer and the water-collecting and dehumidifying layer are an integrally formed part.

10. The greenhouse thermal insulation, dehumidification and water return system according to claim 7, characterized in that: It also includes a water storage tank and a water pump. An outlet is provided at the bottom of the greenhouse, the outlet is connected to the liquid collecting pipe, the inlet of the water pump is connected to the outlet, and the outlet of the water pump is connected to the inlet of the water storage tank.

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