Glass greenhouse and temperature adjusting system thereof

Abstract

The invention provides a glass greenhouse and a temperature adjusting system thereof, and the temperature adjusting system of the glass greenhouse comprises a foundation wall body and a greenhouse main body arranged above the foundation wall body, the greenhouse main body and the foundation wall body form an internal space greenhouse main body capable of accommodating tall plants, the temperature adjusting system is arranged on the greenhouse main body and comprises a plurality of water curtains and a plurality of fans, the water curtains and the fans are arranged on the greenhouse main body, and the water curtains and the fans are arranged in the greenhouse main body. The water curtain and the fan are arranged on the two sides of the greenhouse body in a back-to-back mode, and a glass wall of the greenhouse body comprises a wall bottom, a wall top and a wall waist located between the wall bottom and the wall top. Wherein the water curtain and the fan of the temperature adjusting system are mounted at the wall waist part of the glass wall.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural installation, and in particular to a glass greenhouse and a temperature regulating system thereof. Background Art

[0002] The description herein merely provides background information related to the present disclosure and does not necessarily constitute prior art.

[0003] Greenhouse cultivation technology plays a vital role in modern agricultural production. Among them, the water curtain-fan cooling system, as a common greenhouse temperature regulation method, is widely used in the agricultural greenhouse field.

[0004] The operating principle of a drencher-fan cooling system is based on the evaporation of water at high temperatures. When the ambient temperature is high, water transforms from liquid to vapor, a process that absorbs a large amount of heat. In a drencher-fan cooling system, air flows through a moistened drencher, where the moisture in the air is absorbed by the water, which then carries away the heat and cools the air. The absorbed water then turns into water vapor, carrying the heat as latent heat. This process cools the greenhouse air.

[0005] This system is widely used in agricultural greenhouses primarily because of its many significant advantages. First, the equipment is simple. Water curtains are typically made of absorbent materials such as corrugated plastic paper or fiber cloth, and their structure is relatively simple. Fans are also common mechanical equipment, with mature technology and easy maintenance. Second, the cost is low. Compared with some complex temperature control systems, the equipment and installation costs of a water curtain-fan cooling system are relatively low, which is a very important consideration for agricultural producers. Third, it is reliable. As long as the water and power supply are guaranteed, the system generally operates stably and is not prone to failure. Furthermore, ease of installation is a major advantage. Whether building a new greenhouse or renovating an existing one, the water curtain-fan cooling system can be easily installed without the need for large-scale engineering work.

[0006] However, despite the aforementioned advantages, the radiator-fan cooling system also has significant drawbacks. The most prominent of these is uneven indoor air temperature and large vertical temperature variations. While this system can lower air temperature through water evaporation, the uneven air flow and heat transfer result in significant temperature variations across the greenhouse. This temperature variation is particularly pronounced vertically. Areas near the radiator and fan are relatively cooler, while areas further away are hotter. This large vertical temperature variation can negatively impact greenhouse cultivation.

[0007] Glass greenhouses in the prior art are generally relatively low in height, usually less than 4 meters. This height range is suitable for growing shorter plants. Because the plants are grown at a relatively low height, the temperature difference between the upper and lower parts of the greenhouse is relatively small, which does not significantly affect the growth of the plants. For example, some low plants such as vegetables and flowers can grow well in such a greenhouse environment. These plants have relatively moderate requirements for temperature and humidity, and the lower greenhouse height can meet their growth needs. At the same time, since the temperature difference between the upper and lower parts is not large, the plants can receive light evenly during their growth process and are in a relatively constant temperature environment, which is conducive to their growth and development.

[0008] To sum up, although the water curtain-fan cooling system in the existing technology is widely used in agricultural greenhouses, it has problems such as uneven indoor temperature and large vertical temperature difference. In addition, the existing glass greenhouses are too low to be suitable for growing plants with high vertical space requirements. There is an urgent need for a new temperature regulation system to meet the growth needs of different plants. Summary of the Invention

[0009] A major advantage of the present invention is to provide a glass greenhouse and a temperature control system thereof, wherein the glass greenhouse can accommodate the cultivation of tall plants, and the temperature control system can reduce the problem of large vertical temperature differences in the height direction of the greenhouse.

[0010] Another advantage of the present invention is to provide a glass greenhouse and a temperature control system thereof, wherein the temperature control system includes a water curtain and a fan, which are installed at the waist position of the glass greenhouse to effectively reduce the temperature at the top of the glass greenhouse.

[0011] Beneficial effects: 1. Meet the growth needs of plants with higher canopies: By adjusting the greenhouse structure and the installation height of fans and water curtains, the temperature control system of the present invention can provide a suitable growth environment for tall plants. It solves the problem of limited plant planting caused by the low height of glass greenhouses in the prior art. The flow field of moist and cold air in the greenhouse is relatively improved and prolonged, making the temperature in the greenhouse more uniform, reducing the impact of vertical temperature differences on plant growth. 2. Good cooling effect: The reasonable installation design of fans and water curtains can make moist and cold air flow and exchange heat more fully, and the humidity will not increase significantly while lowering the temperature. The cooling efficiency is improved, providing a more comfortable temperature environment for plant growth. 3. Reliable operation and low cost: The water curtain-fan cooling system adopted in the present invention is simple in equipment, reliable in operation, and easy to install. Compared with other cooling systems, it has a lower cost and is suitable for large-scale promotion and application.

[0012] The purpose of the present invention is to provide a temperature control system that meets the growth requirements of plants with higher canopies by adjusting the installation height of the water curtain and fan of the mechanical cooling system of a large glass multi-span greenhouse, relatively improves and prolongs the flow field of moist and cold air in the greenhouse, enables more sufficient flow heat exchange, and reduces the temperature without significantly increasing the humidity.

[0013] It's worth noting that the glass greenhouse will be referred to as the "greenhouse" below. Specifically, the glass greenhouse adopts a Venlo-style structure with an east-west orientation (or variations depending on location and latitude). This structure provides excellent light and ventilation, creating a suitable environment for plant growth. The greenhouse has a span of 12 meters, with 8.0-meter spacing, a gutter height of 6.0 meters, a ridge height of 7.0 meters, a brick-based parapet elevation of 0.5 meters, and column foundation elevations of ±0.00 meters. The large span and height provide ample growth space for tall plants. The greenhouse's main beams (Liba-style beams) utilize truss beams, offering strong load-bearing capacity. These truss beams effectively support the greenhouse's roof and walls, ensuring stability and safety. The roof is a small triangular roof, with three corner roofs on each span (each main beam). This design is not only aesthetically pleasing but also facilitates rainwater drainage and increases the greenhouse's daylighting area.

[0014] The high eaves of the Venlo roof and the waist-mounted fan installation create vertical airflow channels. This, combined with the east-west longitudinal ventilation path, allows for extended flow and heat exchange of moist, cool air. Adjusting the installation height of the fans and water curtains allows for more even distribution of moist, cool air within the greenhouse, lowering temperatures while minimizing significant increases in humidity. The specific installation height can be adjusted based on the actual greenhouse conditions and the needs of the plants being grown. The number of fans, their installation height, and their spacing should be determined based on the greenhouse's area and ventilation requirements.

[0015] Generally speaking, the more fans there are, the better the ventilation effect, but this also increases costs. The fans should be installed at an appropriate height to ensure that cool, moist air can effectively enter the greenhouse while avoiding strong winds that directly impact the plants. The fans should be evenly spaced to ensure adequate air flow within the greenhouse. The area, mounting height, material, and internal structure of the water curtain should be designed based on the ventilation requirements of the greenhouse and the air volume of the fans. Generally speaking, a larger water curtain area improves the cooling effect, but this also increases costs and floor space. The mounting height of the water curtain should correspond to the fans to ensure that cool, moist air can smoothly pass through the curtain and enter the greenhouse. Water curtains have excellent water absorption and air permeability, effectively absorbing heat from the air and converting it into latent heat as water vapor. The internal structure of the water curtain can be multi-layered to increase the contact area between the air and the curtain, thereby improving the cooling effect.

[0016] The greenhouse water curtain ventilation system of the present invention utilizes the aforementioned wind screens. When the blades are raised horizontally, they align with the direction of the air inlet, significantly increasing the effective air intake area, thereby increasing the air intake per unit time and greatly improving ventilation efficiency. The high-position installation of the water curtain ventilation system facilitates the efficient replacement of warm air within the greenhouse. Warm air rises and is discharged through the high-positioned vents, while fresh, cool air enters from below, creating a good air circulation and further improving ventilation efficiency.

[0017] The control system utilizes advanced automation technology, enabling remote intelligent control. Users can conveniently and quickly operate the ventilation system via mobile phones, computers, and other devices. For example, during the hot summer months, users can remotely activate the ventilation system from their office or home to adjust the greenhouse temperature and create a favorable environment for crop growth.

[0018] The control system also features an intelligent algorithm that automatically adjusts the ventilation system's operating status based on the greenhouse's actual conditions. For example, if the greenhouse temperature is too high, the system automatically activates the motor to raise the blades to level, increasing ventilation and lowering the temperature. If the greenhouse humidity is high, the system automatically closes the cooling pads to reduce the humidity of the air entering the greenhouse.

[0019] Reduce space occupancy Due to the small blade width, the space occupancy rate is reduced. Compared with the traditional ventilation method, the wind window 33 of the present invention takes up less space when opened, does not affect the operation inside and outside the greenhouse, and saves greenhouse space.

[0020] The split aluminum leaf shutter is located behind the water curtain and is embedded in the water curtain, which is closely integrated with the water curtain and does not affect the overall appearance of the greenhouse. At the same time, this installation method is also conducive to protecting the blades and motor and reducing the impact of the external environment on them.

[0021] The external structure is more simple and beautiful The greenhouse water curtain ventilation system of the present invention has a simple and beautiful external structure. The combination of split aluminum leaf windows and water curtains makes the overall appearance of the greenhouse more harmonious. Compared with flip-up windows and sliding windows, the present invention has obvious advantages in terms of aesthetics.

[0022] The simple and beautiful external structure not only improves the overall image of the greenhouse, but also provides favorable conditions for the development of new agricultural models such as agricultural tourism and ecological agriculture.

[0023] According to one aspect of the present invention, a temperature control system for a glass greenhouse of the present invention can achieve the aforementioned objects and other objects and advantages. The glass greenhouse includes foundation walls and a greenhouse body disposed above the foundation walls. The greenhouse body and the foundation walls form an interior space for accommodating the cultivation of tall plants. The temperature control system is disposed in the greenhouse body and includes: Multiple water curtains and multiple fans are provided in the greenhouse main body, and the water curtains and the fans are provided back to back on both sides of the greenhouse main body, the glass wall of the greenhouse main body includes a wall bottom, a wall top and a wall waist located between the wall bottom and the wall top, wherein the water curtains and the fans of the temperature control system are installed at the wall waist of the glass wall, when the temperature control system is working, the outside air enters the internal space of the greenhouse main body through the water curtains carrying water vapor, wherein the water vapor circulates in the internal space of the greenhouse main body and carries heat and is discharged from the greenhouse main body through the fans to reduce the temperature inside the greenhouse main body.

[0024] According to one embodiment of the present invention, the water curtain and the fan of the temperature regulating system are installed at 1 / 2 to 2 / 3 of the overall height of the greenhouse body.

[0025] According to one embodiment of the present invention, the temperature control system further includes a plurality of wind windows, wherein the wind windows are arranged on the glass wall of the greenhouse body, and the wind windows are arranged adjacent to the water curtain of the temperature control system, and the wind windows can be opened and closed to control the entry of outside air into the greenhouse body and the direction of airflow.

[0026] According to one embodiment of the present invention, the wind window is arranged on the inner side of the water curtain, that is, the wind window is located inside the greenhouse body, and the external air flow carries water vapor through the water curtain through the wind window to reach the internal space of the greenhouse body.

[0027] According to one embodiment of the present invention, the wind window is arranged outside the water curtain, that is, the wind window is located outside the greenhouse body, and the external air flow carries water vapor through the wind window and the water curtain to reach the internal space of the greenhouse body.

[0028] According to one embodiment of the present invention, the wind window further includes a frame, a series of blades arranged on the frame, and a connecting rod mechanism that drives the blades to move, wherein the blades are movably arranged on the frame, and the connecting rod mechanism is connected to the blades, and the connecting rod mechanism can drive the blades to flip.

[0029] According to one embodiment of the present invention, the blades are pivotally arranged on the inner side of the frame, wherein the connecting rod mechanism includes a transmission rod and a plurality of connecting rod transmission parts, wherein one end of the connecting rod transmission part is connected to the transmission rod, and the other end of the connecting rod transmission part is connected to the blades, and when the transmission rod moves upward or downward, the transmission rod drives the blades to flip upward or downward through the connecting rod transmission part.

[0030] According to another aspect of the present application, the present application further provides a glass greenhouse, comprising: A foundation wall, a greenhouse body arranged above the foundation wall, and a temperature control system as described above, wherein the greenhouse body and the foundation wall form an internal space for accommodating the cultivation of tall plants, wherein the temperature control system includes a plurality of water curtains and a plurality of fans, and the water curtains and the fans are arranged in the greenhouse body, and the water curtains and the fans are arranged back to back on both sides of the greenhouse body.

[0031] According to one embodiment of the present invention, the greenhouse body includes a glass wall and a glass roof, wherein the glass roof is arranged on the top of the glass wall and supported by the glass wall.

[0032] According to one embodiment of the present invention, the glass wall further includes a front wall, a back wall, and side walls located on both sides of the front wall and the back wall, wherein the front wall, the back wall, the side walls and the glass ceiling form a closed greenhouse space. The water curtain is arranged on the front wall, and the fan is arranged on the back wall; or the water curtain is arranged on the back wall, and the fan is arranged on the front wall.

[0033] According to another aspect of the present application, the present application further provides a temperature control system for a glass greenhouse, wherein the glass greenhouse includes a foundation wall and a greenhouse body arranged above the foundation wall, the greenhouse body and the foundation wall form an internal space greenhouse body for accommodating plant cultivation, and the temperature control system is arranged in the greenhouse body, characterized in that the temperature control system includes: a plurality of water curtains and a plurality of fans, the water curtains and the fans are arranged on the greenhouse body, and the water curtains and the fans are arranged back to back on both sides of the greenhouse body, and the glass wall of the greenhouse body includes a wall bottom. The bottom of the wall, the top of the wall and the waist of the wall between the bottom of the wall and the top of the wall, wherein the water curtain and the fan of the temperature control system are installed at the waist of the wall of the glass wall. When the temperature control system is working, the outside air enters the internal space of the greenhouse main body through the water curtain with water vapor, and exchanges heat with the internal air of the greenhouse main body. After the water vapor absorbs heat and becomes water vapor, it absorbs heat energy in the air and reduces the temperature of the air. After the water vapor absorbs heat in the internal space of the greenhouse main body and becomes water vapor, it is discharged from the greenhouse main body through the fan to reduce the temperature inside the greenhouse main body.

[0034] According to one embodiment of the present invention, the water curtain and the fan of the temperature control system are installed at 1 / 2 to 2 / 3 of the overall height of the greenhouse body, which is determined based on the heat exchange efficiency and temperature distribution uniformity of the air inside the greenhouse.

[0035] According to one embodiment of the present invention, the temperature control system further includes a plurality of wind windows, wherein the wind windows are arranged on the outside of the water curtain, and the wind windows can be opened and closed to control the entry of outside air into the greenhouse body and the direction of airflow; the horizontal distance between the wind windows and the water curtain is between 30m and 45m, and the vertical height difference is within 0.4m.

[0036] According to one embodiment of the present invention, the wet curtain adopts a staggered corrugation of 45°×45°, which has high evaporation cooling efficiency, natural water absorption and fast diffusion speed; the thickness of the wet curtain is 150mm.

[0037] According to one embodiment of the present invention, the wind window is arranged on the outside of the water curtain, that is, the wind window is located outside the greenhouse body, and the external airflow passes through the wind window and the water curtain and carries water vapor to the internal space of the greenhouse body; after the external airflow enters through the wind window, a pre-acceleration area is formed between the wind window and the water curtain, and the airflow speed is increased to 2.0m / s, and then when passing through the water curtain, due to the resistance of the water curtain, the airflow speed is evenly reduced to 1.6-1.7m / s and carries water vapor into the internal space of the greenhouse body.

[0038] According to one embodiment of the present invention, the wind window further includes a frame, a series of blades arranged on the frame, and a connecting rod mechanism that drives the blades to move, wherein the blades are movably arranged on the frame, and the connecting rod mechanism is connected to the blades, and the connecting rod mechanism can drive the blades to flip.

[0039] According to one embodiment of the present invention, the blades are pivotally arranged on the inner side of the frame, wherein the connecting rod mechanism includes a transmission rod and a plurality of connecting rod transmission parts, wherein one end of the connecting rod transmission part is connected to the transmission rod, and the other end of the connecting rod transmission part is connected to the blades, and when the transmission rod moves upward or downward, the transmission rod drives the blades to flip upward or downward through the connecting rod transmission part.

[0040] According to another aspect of the present application, the present application further provides a glass greenhouse, comprising: a foundation wall, a greenhouse main body arranged above the foundation wall, and a temperature control system as described above, wherein the greenhouse main body and the foundation wall form an internal space for accommodating plant planting, wherein the temperature control system comprises a plurality of water curtains and a plurality of fans, the water curtains and the fans are arranged in the greenhouse main body, and the water curtains and the fans are arranged back to back on both sides of the greenhouse main body.

[0041] According to one embodiment of the present invention, the main body of the greenhouse is a high-eave Venlo structure, the top of the greenhouse is a small triangular roof, and three corner roofs are provided on each span (each main beam); the eaves height of the high-eave Venlo structure is 7m, the span is 12m, and the spacing is 8m. This structural design can make the lighting rate inside the greenhouse reach 60%-80%.

[0042] According to one embodiment of the present invention, the glass wall further includes a front wall, a back wall, and side walls located on both sides of the front wall and the back wall, wherein the front wall, the back wall, the side walls and the glass ceiling form a closed greenhouse space. The water curtain is arranged on the front wall, and the fan is arranged on the back wall; or the water curtain is arranged on the back wall, and the fan is arranged on the front wall.

[0043] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and accompanying drawings.

[0044] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings, unless otherwise specified, the same reference numerals are used to represent the same components. Figure 1 It is a side structural schematic diagram of a glass greenhouse according to a first preferred embodiment of the present invention.

[0046] Figure 2 It is a structural schematic diagram of a glass greenhouse according to a first preferred embodiment of the present invention.

[0047] Figure 3 Schematic diagram of the installation position of the temperature control system for the glass greenhouse according to the first preferred embodiment of the present invention.

[0048] Figure 4 It is a structural schematic diagram of an air inlet window of a glass greenhouse according to a first preferred embodiment of the present invention.

[0049] Figure 5 Schematic diagram of the glass greenhouse according to the first preferred embodiment of the present invention, showing the air inlet window in an open state.

[0050] Figure 6 Schematic diagram of the air inlet window of the glass greenhouse in a closed state according to the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0051] It should be pointed out that the embodiments shown in the drawings are only used as examples to specifically and vividly explain and illustrate the concept of the present invention. Their size and structure are not necessarily drawn to scale, nor do they constitute a limitation to the concept of the present invention.

[0052] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly mentioned in this specification are defined relative to the structure shown in the respective drawings. They are relative concepts and may vary accordingly depending on the position or usage of the device. Therefore, these or other directional terms should not be interpreted as restrictive.

[0053] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0054] Refer to the accompanying drawings of this application specification Figures 1 to 6As shown, a glass greenhouse and its temperature control system according to the first preferred embodiment of the present application are explained in the following description. The glass greenhouse includes a foundation wall 10, a greenhouse body 20 disposed above the foundation wall, and a temperature control system 30 installed on the greenhouse body 20. The greenhouse body 20 and the foundation wall 10 form an interior space for accommodating the cultivation of tall plants. The temperature control system 30 includes a plurality of water curtains 31 and a plurality of fans 32. The water curtains 31 and the fans 32 are disposed on the greenhouse body 20, and the water curtains 31 and the fans 32 are disposed back to back on both sides of the greenhouse body 20.

[0055] The fan 32 blows air toward the exterior of the interior of the greenhouse body 20, creating a negative pressure within the interior of the greenhouse body 20. External air enters the interior of the greenhouse body 20 through the water curtain 31. Due to its excellent water absorption and air permeability, the water curtain 31 effectively absorbs heat from the air and converts it into latent heat from the water vapor. The interior of the water curtain 31 includes a multi-layered, conductive mesh water filter structure to increase the contact area between the air and the water curtain, thereby enhancing the cooling effect.

[0056] The greenhouse body 20 includes glass walls 201 and a glass roof 202, wherein the glass roof 202 is arranged on top of the glass walls 201 and supported by the glass walls 201. The glass walls 201 further include a front wall 21, a back wall 22, and side walls 23 located on both sides of the front wall 21 and the back wall 22. The front wall 21, the back wall 22, the side walls 23, and the glass roof form an enclosed greenhouse space.

[0057] The greenhouse body 20 further includes a main body bracket 25 and a glass plate 26 arranged on the main body bracket 25, wherein the front wall 21, the back wall 22, the side wall 23 and the glass ceiling of the greenhouse body 20 are composed of the main body bracket 25 and the glass plate 26 arranged on the main body bracket 25.

[0058] The front wall 21 and the back wall 22 are arranged back to back, wherein the water curtain 31 and the fan 32 of the temperature control system 30 are respectively arranged on the front wall 21 and the back wall 22. As an example, in a specific embodiment of the present application, the water curtain 31 is arranged on the front wall 21 and the fan 32 is arranged on the back wall 22; or the water curtain 31 is arranged on the back wall 22, and the fan 32 is arranged on the front wall 21.

[0059] Preferably, in this preferred embodiment of the present application, the front wall 21 and the back wall 22 of the greenhouse body 20 are oriented in a north-south direction.

[0060] Preferably, the water curtain 31 of the temperature control system 30 is installed on the front wall 21 of the greenhouse body 20, and the fan 32 is installed on the back wall 22 of the greenhouse body 20, and the installation heights of the water curtain 31 and the fan 32 are the same or approximately the same.

[0061] The glass wall 201 of the greenhouse body 20 includes a wall bottom 2011, a wall top 2012, and a wall waist 2013 located between the wall bottom 2011 and the wall top 2012. The glass wall 201 is an integrated structure. The water curtain 31 and the fan 32 of the temperature control system 30 are installed in the wall waist 2013 of the glass wall 201. When the temperature control system 30 is in operation, outside air enters the interior of the greenhouse body 20 through the water curtain 31, carrying water vapor. The water vapor circulates within the interior of the greenhouse body 20, carrying heat, and is discharged from the greenhouse body 20 through the fan 32, thereby reducing the temperature inside the greenhouse body 20 and achieving temperature control.

[0062] It is worth mentioning that in this preferred embodiment of the present application, when the external environment temperature is high, when the air in the external environment enters the interior of the greenhouse main body 20 through the water curtain, the heavier part of the water vapor circulates downward from the position of the water curtain 31; the lighter part of the water vapor circulates upward from the position of the water curtain 31; the undivided water vapor will circulate along the position at the same height as the water curtain 31, so that the high, bottom and middle layers of the greenhouse main body 20 can all realize water vapor circulation, which is beneficial to reducing the vertical temperature difference inside the greenhouse main body 20.

[0063] Preferably, in a specific example of the present application, the water curtain 31 and the fan 32 of the temperature control system 30 are installed at 1 / 2 to 2 / 3 of the overall height of the greenhouse body 20. The temperature control system 30 of this preferred embodiment of the present application meets the growth requirements of plants with higher canopies. By adjusting the greenhouse structure and the installation heights of the fans and water curtains, the temperature control system of the glass greenhouse of the present invention can provide a suitable growth environment for tall plants. It solves the problem in the prior art that the glass greenhouse is of low height and is not suitable for the cultivation of tall plants. It relatively improves and prolongs the flow field of the moist and cold air in the greenhouse, making the temperature in the greenhouse more uniform and reducing the impact of vertical temperature differences on plant growth.

[0064] To create a more suitable microenvironment for plant growth in glass greenhouses with large vertical height differences, we have implemented a series of optimization measures, adjusting the greenhouse structure and the installation heights of fans and water curtains. First, we designed the top of the greenhouse into a specific structure. This not only increases the height of the interior, resulting in a more even distribution of vertical light, but also prevents localized areas of excessive or insufficient light. Based on the arched structure, we rationally divide the planting areas based on the plants' varying light intensity requirements. For example, light-loving plants are planted in the well-lit area at the top, while shade-tolerant plants are placed closer to the ground with less light.

[0065] The installation heights of fans and water curtains are precisely configured based on the different levels of plant growth and the physical characteristics of air circulation. Water curtains are typically installed at a height of 1.5-2 meters from the ground. This height ensures that the water in the curtains can fully evaporate after being supplied with water, forming a stable layer of moist, cool air. It also facilitates coordination with the fans to guide the cool air downward. The fan's installation height is adjusted based on the overall height and span of the greenhouse. It is generally installed 0.5-1 meter from the top of the greenhouse. This effectively extracts hot air from the upper portion of the greenhouse and promotes good upward and downward air circulation. This layout optimizes the air circulation pattern within the greenhouse. After entering from one side of the water curtain, the cold air slowly descends along the vertical direction of plant growth, providing a suitable temperature and humidity environment for plants at different heights. This avoids temperature stratification and localized overheating or overcooling caused by vertical height differences, greatly satisfying the environmental requirements of various plants at different growth stages.

[0066] In addition, the temperature control system 30 of this preferred embodiment of the present application has a good cooling effect. The reasonable installation design of the fan and the water curtain can make the wet cold air flow and exchange heat more fully, reducing the temperature without significantly increasing the humidity. This improves the cooling efficiency and provides a more comfortable temperature environment for plant growth. 3. Reliable operation and low cost The water curtain-fan cooling system used in the present invention is simple in equipment, reliable in operation, and easy to install. Compared with other cooling systems, it is low in cost and suitable for large-scale promotion and application.

[0067] The key to achieving effective cooling and maintaining stable humidity lies in the synergy between the specific technical parameters of the fan and the water curtain. For example, the fan we selected is a 1380 negative pressure fan with a power of 1.1 kWh, a ventilation volume of 40,000 m³ / h, and a wind pressure range of 100-200 Pa. The water curtain has a specific surface area of ​​400 m² / m³ and a thermal conductivity of 0.6 W / (m・K). Based on the convective heat transfer formula Q=hAΔT in heat exchange theory (where Q represents the amount of heat exchanged, h is the convective heat transfer coefficient, A is the heat transfer area, and ΔT is the temperature difference), as well as the formula in mass exchange theory relating water evaporation to changes in air humidity, the fan's powerful ventilation volume can quickly transport the moist, cool air generated by the water curtain to every corner of the greenhouse, expanding the range and efficiency of heat exchange. The larger specific surface area of ​​the water curtain provides more places for water to evaporate. Under the action of the fan, air quickly passes over the surface of the water curtain, accelerating the evaporation of water. During the evaporation process, a large amount of heat is absorbed, which reduces the air temperature. At the same time, the reasonable value of the thermal conductivity coefficient ensures that the water curtain can transfer heat out in time after absorbing heat, maintain its own low temperature, and continuously provide favorable conditions for cooling the air. According to relevant experimental research results, in a simulated greenhouse environment, when the fan is running at the rated ventilation volume and the water curtain maintains normal water supply, in a closed space with a standard volume of 1000m³, after 10 minutes of operation, the air temperature can drop from the initial 32°C to about 26°C, and the relative humidity can be stabilized between 60% and 70%, fully verifying the effect of efficient cooling and humidity stability under the synergistic effect of these parameters.

[0068] The greenhouse structure is constructed as follows. Foundation construction is carried out according to design requirements. The foundation can be a concrete standalone foundation or a strip foundation to ensure stability and load-bearing capacity. During foundation construction, the elevation and levelness of the foundation must be strictly controlled to ensure precise installation of the greenhouse. Column installation: Columns are the primary support structure of the greenhouse and should be made of high-quality steel. Columns must be installed vertically and securely to ensure overall stability. Column height should be adjusted according to the greenhouse's design height, ensuring that the ridge and gutter heights meet design requirements. Main beam installation: Truss-type main beams offer strong load-bearing capacity. Main beams must be securely connected to the columns to ensure structural safety. The spacing of the main beams should be adjusted according to the greenhouse's span and design requirements to ensure structural stability and uniform lighting. Roof and wall installation: The roof features a small triangular roof made of transparent glass or polycarbonate panels, providing excellent light and thermal insulation. The roof must be securely installed and sealed to ensure the greenhouse is waterproof. The wall can be made of glass, polycarbonate panels or thermal insulation materials, which have good thermal insulation and lighting. The wall should be installed vertically and firmly, taking into account the overall aesthetics while ensuring structural safety.

[0069] The installation instructions for fans and water curtains are shown below. The number and location of fans should be determined based on the greenhouse's area and ventilation requirements. Fans can be installed on the greenhouse's side walls or gables, or on the roof. The fans should be installed at a moderate height, generally between 1 / 2 and 2 / 3 of the greenhouse's height. The fans should be securely and levelly mounted to ensure proper operation. Fans should be evenly spaced, generally 5 to 10 meters apart. Protective nets should be installed at the fan inlets and outlets to prevent debris from entering and affecting their operation.

[0070] When determining the number of fans, we follow a rigorous scientific calculation method. The formula for calculating the total ventilation volume of a greenhouse is greenhouse volume multiplied by the number of cycles: Total Ventilation Volume = Greenhouse Volume * Number of Cycles = S * H ​​* n (where S is the base area, H is the height, and n is the number of cycles). Taking our existing glass greenhouse as an example, its base area S is measured to be 2000m² and its height H is 34m. Based on the existing number of fans and actual operational monitoring, the number of cycles is approximately 37 / hour. Generally speaking, in conventional glass greenhouse ventilation designs and conventional installation methods, the number of cycles is typically around 4-10. However, due to the high ventilation requirements of the plant species grown in our greenhouse and the unique structure of the greenhouse itself, we have determined this relatively high number of cycles. Of course, the specific number of cycles can be flexibly set to meet different ventilation needs. Based on the known total ventilation volume of the greenhouse and the fan model we selected (ventilation volume is 40,000 m³ / h), according to the calculation formula of number of fans = total ventilation volume of the greenhouse / fan ventilation volume, that is, 680,000 / 40,000 = 17 fans, it is finally determined that 17 fans need to be installed to meet the ventilation needs of the greenhouse and ensure that the air in the greenhouse can achieve effective circulation and temperature regulation.

[0071] The size and location of the water curtain should be determined based on the greenhouse's ventilation requirements and the fan's air volume. The water curtain can be installed on the greenhouse's side walls, gables, or roof. The installation height of the water curtain should correspond to the fan, generally between 1 / 2 and 2 / 3 of the greenhouse's height. The water curtain must be securely and levelly installed to ensure proper operation. The material of the water curtain should be both absorbent and breathable, typically made of corrugated plastic paper or fiber cloth. The internal structure of the water curtain can be multi-layered to increase the contact area between the air and the water curtain, enhancing the cooling effect.

[0072] Determining the area of ​​the water curtain also relies on a clear calculation. The formula is Swet = Q / 3600 / V (where Q is the ventilation volume and V is the wind speed of the water curtain). In our system, the ventilation volume Q, determined through previous calculations and overall design, is 680,000 m³ / h. The wind speed V of the water curtain is set at 1.7 m / s. Based on this formula, the water curtain area Swet = 111.6 m². From a cooling principle perspective, generally speaking, the lower the wind speed v of the water curtain, the longer the air stays on the surface of the water curtain, the more complete the water evaporation, and the greater the cooling effect. However, the wind speed cannot be too low, otherwise it will affect ventilation efficiency and air circulation throughout the greenhouse. Therefore, after considering various factors, we determined a suitable wind speed of 1.7 m / s to ensure that the water curtain can meet ventilation requirements while achieving a good cooling effect.

[0073] Determining the number of fans requires precise calculations based on a variety of factors. First, based on the critical parameter of greenhouse volume, agricultural experience and scientific research on environmental regulation, a certain number of air changes per cubic meter of space is required to maintain a favorable air environment and temperature regulation. Through extensive field testing and data analysis, we have established a standard air change rate suitable for growing specific plant varieties in glass greenhouses like ours. Taking into account the actual floor area and height of the greenhouse, we calculate the total ventilation volume required using the formula: Total greenhouse ventilation volume = greenhouse volume * number of cycles. Then, based on the ventilation volume corresponding to the specific fan model selected, we divide the total greenhouse ventilation volume by the fan's ventilation volume to accurately determine the required number of fans.

[0074] We fully utilized aerodynamic principles and greenhouse temperature distribution simulation results to determine the fan installation height and spacing. From an aerodynamic perspective, air flow within a greenhouse follows certain physical laws. To ensure that fans can maximize the flow of air through optimal circulation paths and avoid dead zones or localized turbulence, we used computer simulation software to conduct multiple air flow simulations at different installation heights and spacings. After repeated testing and comparisons, we found that fans installed 0.5-1 meter from the greenhouse ceiling are most effective in extracting hot air from the ceiling, promoting smooth upward and downward convection. Regarding fan spacing, a typical setting is approximately 4 meters, but this value is not fixed and can be adjusted based on the greenhouse span. For example, for a smaller greenhouse span, the spacing can be reduced to enhance ventilation in certain areas; for a larger span, the spacing can be increased accordingly. At the same time, comprehensive consideration should be given to ensuring overall ventilation, such as increasing the number of fans, to ensure that plants throughout the greenhouse receive a good air environment and achieve uniform temperature regulation.

[0075] Hereinafter, the temperature control system will be referred to as the system. System commissioning and operation are described below. System commissioning is performed after system installation. First, check that the fan and damper are securely and levelly installed, and that the air inlet and outlet are unobstructed. Then, start the fan and damper, and check that the system is operating normally and that the temperature and humidity meet design requirements. If the system is not operating properly, promptly investigate the cause and make adjustments and repairs. After system commissioning is completed, a trial run should be performed to ensure system stability and reliability. During system operation, regularly check the operation of the fan and damper, and promptly clean debris from the air inlet and outlet to ensure proper system operation. Adjust the operating parameters of the fan and damper according to changes in greenhouse temperature and humidity to ensure that the temperature and humidity meet plant growth requirements. In winter or cold regions, insulate the fan and damper to ensure proper system operation.

[0076] To better illustrate the technical effects of the present invention, a specific implementation case study is provided below. Case Background: An agricultural park plans to build a large glass multi-span greenhouse for growing tall plants. The greenhouse has an area of ​​2,000 square meters, a span of 12 meters, a pitch of 8 meters, a gutter height of 6 meters, and a ridge height of 7 meters. System Design: The greenhouse structure adopts a Venlo structure, running east-west. The greenhouse's main beams utilize truss beams, and the roof is a small triangular roof with three corner roofs on each span. The surrounding brick-based parapet walls have an elevation of 0.5 meters, and the column foundation elevation is ±0.00 meters. The fan and water curtain installation design determined the installation of 10 fans based on the greenhouse's area and ventilation requirements. The fans are installed on the greenhouse's side walls at a height of 4 meters and at intervals of 10 meters. The water curtain has an area of ​​100 square meters and is installed on the greenhouse's side walls at a height of 4 meters. The water curtain is made of corrugated plastic paper with a three-layer internal structure. System operation effect: Temperature regulation effect In high temperature weather in summer, when the outdoor temperature is 35°C, the temperature in the greenhouse can be reduced to about 25°C through the temperature regulation system of the present invention, and the cooling effect is obvious. The temperature distribution in the greenhouse is relatively uniform, and the vertical temperature difference is less than 3°C, which meets the needs of growing tall plants. Humidity control effect The water curtain-fan cooling system will not significantly increase the humidity while lowering the temperature. By reasonably adjusting the operating parameters of the fan and water curtain, the relative humidity in the greenhouse can be controlled at about 60%, providing a suitable humidity environment for plant growth. Operation cost analysis The temperature regulation system of the present invention adopts a water curtain-fan cooling system, which has simple equipment, reliable operation and easy installation. Compared with other cooling systems, the operating cost is lower. According to calculations, the operating cost of the system is about 0.5 yuan per square meter per day, which has a high cost performance.

[0077] The temperature control system of the present invention meets the growth requirements of plants with higher canopies by adjusting the installation height of the water curtain and fan of the mechanical cooling system of the large glass multi-span greenhouse, relatively improving and prolonging the flow field of the moist and cold air in the greenhouse, so that the flow heat exchange can be more fully carried out, and the humidity will not increase significantly while the temperature is reduced. The system has the advantages of good cooling effect, reliable operation, and low cost. It is suitable for large glass multi-span greenhouses for growing tall plants and has broad application prospects. The above content is for reference only. The specific technical solutions and implementation methods can be adjusted and optimized according to actual conditions. In actual applications, it is also necessary to combine local climatic conditions, the needs of planted plants and other factors to carry out reasonable design and installation to ensure the normal operation of the system and a good cooling effect.

[0078] The temperature control system further includes a plurality of wind windows 33, wherein the wind windows 33 are arranged on the glass wall 201 of the greenhouse body 20, and the wind windows 33 are arranged adjacent to the water curtain 31 of the temperature control system 30. The wind windows 33 can be opened and closed to control the entry of outside air into the greenhouse body 20 and the direction of airflow.

[0079] As an example, in one specific embodiment of the present application, the wind window 33 is disposed on the inner side of the water curtain 31, that is, the wind window 33 is located inside the greenhouse body 20, and the outside air flows through the water curtain 31, carrying water vapor through the wind window 33 to reach the interior space of the greenhouse body 20. Alternatively, in another optional embodiment of the present application, the wind window 33 is disposed on the outer side of the water curtain 31, that is, the wind window 33 is located outside the greenhouse body 20, and the outside air flows through the wind window 33 and the water curtain 31, carrying water vapor to reach the interior space of the greenhouse body 20.

[0080] The wind window 33 is used to control the airflow entering the greenhouse body 20 and adjust the flow direction of the airflow.

[0081] Specifically, the wind window 33 further includes a frame 331, a series of blades 332 arranged on the frame 331, and a connecting rod mechanism 333 that drives the blades 332 to move, wherein the blades 332 are movably arranged on the frame 331, and the connecting rod mechanism 333 is connected to the blades 332. The connecting rod mechanism 333 can drive the blades 332 to flip to achieve the opening and closing of the wind window 33 and the air intake angle of the airflow.

[0082] The connecting rod mechanism 333 can drive the blade 332 to flip upward from bottom to top, and the air intake angle of the airflow can be adjusted by changing the flip angle of the blade 332.

[0083] Specifically, the blade 332 is pivotally arranged on the inner side of the frame 331, wherein the connecting rod mechanism 333 includes a transmission rod 3331 and a plurality of connecting rod transmission parts 3332, wherein one end of the connecting rod transmission part 3332 is connected to the transmission rod 3331, and the other end of the connecting rod transmission part 3332 is connected to the blade 332. When the transmission rod 3331 moves upward or downward, the transmission rod 3331 drives the blade 332 to flip upward or downward through the connecting rod transmission part 3332 to realize the opening and closing of the blade 332.

[0084] The connecting rod transmission member 3332 of the connecting rod mechanism 333 is connected to the blade 332 in a manner of resistance, and the connecting rod transmission member 3332 is located on the inner side of the blade 332. When the connecting rod transmission member 3332 is rotated upward or downward by the transmission rod 3331, the connecting rod transmission member 3332 resists outward and pushes the blade 332 to move, or the connecting rod transmission member 3332 pulls the blade 332 inward to move, so as to realize the opening and closing of the blade 332.

[0085] It is worth mentioning that in this preferred embodiment of the present application, the transmission rod 3331 of the linkage mechanism 333 drives the connected linkage transmission member 3332 to move downward, causing the blades 332 to flip upward from bottom to form an air intake passage for airflow inside the blades 332. When the blades 332 are opened, the air intake passage formed is opened, and the blades 332 guide external airflow from the outside to the inside into the interior space of the greenhouse body 20.

[0086] When the blades 332 are fully opened, the blades 332 are horizontal, and the air intake channel formed by the blades 332 is a horizontal air intake. When the blades 332 are not fully opened, the blades 332 form a downward air intake, that is, the outside air is guided by the blades 332 from bottom to top along the air intake channel into the internal space of the greenhouse body 20.

[0087] It can be understood that the blades 332 can guide the external space from bottom to top into the internal space of the greenhouse body 20, and guide the flow direction of the internal airflow, guiding at least part of the airflow upward to the top of the greenhouse body 20, which is beneficial to the flow above the greenhouse body 20 and reduces the temperature of the upper part of the greenhouse body 20.

[0088] Furthermore, the frame 331 includes an upper beam 3311 , a lower beam 3312 , and side frames 3313 located on both sides of the upper beam 3311 and the lower beam 3312 , wherein the blades 332 and the connecting rod mechanism 333 are arranged inside the side frames 3313 of the frame 331 .

[0089] The wind window 33 further includes a driving device 334 , wherein the driving device 334 is connected to the connecting rod mechanism 333 . The driving device 334 can drive the transmission rod 3331 of the connecting rod mechanism 333 to move up and down, so as to realize the opening and closing of the wind window 33 .

[0090] As an example, in this preferred embodiment of the present application, the driving device 334 can be, but is not limited to, a manual rotary knob or a motor.

[0091] The blade 332 includes a blade body 3321 and a blade front end 3322 and a blade rear end 3323 integrally formed on the blade body 3321, wherein the blade front end 3322 is located at the front end of the blade rear end 3323. When the blade 332 is opened, the blade front end 3322 of the blade 332 is flipped outward and upward, and the blade rear end 3323 of the blade 332 is flipped inward and downward; when the blade 332 is closed, the blade front end 3322 and the blade rear end 3323 of the front and rear adjacent blades 332 are overlapped front and back, so that the wind window 33 is sealed.

[0092] The greenhouse water curtain ventilation system further includes a control system (not shown in the figure), wherein the control system is connected to the driving device 334 of the wind window 33, and the control system realizes the opening and closing of the wind window 33 through the driving device 334.

[0093] It is worth mentioning that in this preferred embodiment of the present application, the blades 332 of the wind window 33 are split aluminum blade structures. The water curtain 31 is installed on the inside or outside of the greenhouse to reduce the temperature of the air entering the greenhouse. The wind window 33 is installed behind the water curtain and is driven by a motor to raise and lower the blades, thereby controlling the opening and closing of the vent.

[0094] According to another aspect of the present application, the present application further provides a greenhouse water curtain ventilation control system, wherein the greenhouse water curtain ventilation control system includes a water curtain 31 and a wind window 33, wherein the wind window 33 is arranged on the glass wall 201 of the greenhouse main body 20, and the wind window 33 is arranged adjacent to the water curtain 31 of the temperature control system 30, and the wind window 33 can be opened and closed to control the entry of outside air into the greenhouse main body 20 and the direction of airflow.

[0095] The control system uses advanced automation technology to achieve remote intelligent control. Users can operate the ventilation system conveniently and quickly through mobile phones, computers and other terminal devices.

[0096] Specifically, the blades 332 of the windshield 33 are made of aluminum alloy, offering advantages such as light weight, high strength, and corrosion resistance. The number of blades 332 is 11 (adjustable based on the height of the water curtain), and the blade width is relatively small to minimize space occupancy. Notably, the blade shape is optimized to align with the direction of the air inlet when raised horizontally, maximizing the effective air intake area and improving ventilation efficiency.

[0097] The motor of the windshield 33 uses a high-performance motor to drive the blades to rise and fall. The motor has the characteristics of high torque, stable operation, low noise, etc. The motor is connected to the control system to achieve remote intelligent control.

[0098] Preferably, in this preferred embodiment of the present application, the wind window 33 is embedded in the frame behind the water curtain, tightly integrated with the water curtain, and does not affect the overall appearance of the greenhouse. At the same time, this installation method is also beneficial for protecting the blades and motor, reducing the impact of the external environment on them.

[0099] As you can understand, the control system primarily consists of a controller, sensors, and a communication module. The controller utilizes a high-performance microprocessor with powerful computing and control capabilities. Sensors monitor greenhouse parameters such as temperature, humidity, and wind speed in real time, providing data support for the control system. The communication module enables communication between the controller and remote terminal devices, allowing users to operate the ventilation system via mobile phones, computers, and other devices.

[0100] The control system software features intelligent algorithms that automatically adjust the ventilation system's operating status based on the greenhouse's actual conditions. For example, if the greenhouse temperature is too high, the system automatically activates the motor to raise the blades to level, increasing ventilation and lowering the temperature. If the humidity is low, the system automatically activates the cooling pad to increase humidity. The software also includes remote monitoring and fault diagnosis capabilities, allowing users to monitor the ventilation system's operating status in real time via a remote terminal device, identifying and resolving issues promptly.

[0101] Our temperature control system utilizes advanced automation technology based on PLC (Programmable Logic Controller) control and the Internet of Things (IoT) architecture. As the core control unit, the PLC possesses powerful logic and control capabilities, enabling precise operation and control of each device according to pre-programmed instructions. IoT technology enables remote intelligent control of the system. By installing IoT communication modules on each device and sensor, connecting them to a unified network platform, operators can monitor greenhouse environmental parameters such as temperature, humidity, and light in real time via mobile phones, computers, and other devices, regardless of their location. They can also remotely control cooling equipment such as fans, water curtains, and shade nets.

[0102] In terms of intelligent control algorithms, the system utilizes a variety of advanced algorithms to achieve precise environmental regulation. For example, it employs a fuzzy control algorithm combined with a PID (proportional-integral-differential) control algorithm. The fuzzy control algorithm is well suited to handling complex, nonlinear system control problems such as greenhouse environments. It roughly determines the control strategy to be adopted based on the changing trends of parameters such as temperature and humidity within the greenhouse and the deviations from preset thresholds. The PID control algorithm further precisely adjusts the control quantity based on this. By calculating the proportional, integral, and differential calculations of the deviations, it achieves precise adjustment of specific equipment operating parameters such as fan speed and water supply of the water curtain, ensuring that the greenhouse environment is always stable and optimal for plant growth.

[0103] In order to accurately monitor the overall temperature and humidity conditions in the greenhouse, we use five-element sensors and evenly distribute their installation positions at different heights and areas inside the greenhouse. In the vertical direction, sensor installation points are set at intervals of 2-3 meters from the ground to the top, so that the temperature and humidity data at different height levels can be fully obtained to avoid monitoring blind spots caused by height differences; in the horizontal direction, according to the size of the greenhouse, they are installed in a square or rectangular grid layout to ensure that the environmental parameters of each area can be accurately sensed. The connection between the sensor and the controller uses a wireless transmission module with a Wi-Fi protocol. This method has many advantages. On the one hand, it avoids complex wiring projects, reduces installation costs and maintenance difficulties; on the other hand, the Wi-Fi protocol can ensure the real-time and stability of data transmission, ensuring that the controller can obtain the latest environmental parameter information in a timely manner so that it can quickly make corresponding control decisions.

[0104] Examples of control principles and specific control scenarios using isoenthalpy and psychrometric diagrams: The system uses the principle of humidification and cooling based on a psychrometric diagram to control cooling equipment such as fans, water curtains, and shade nets. The psychrometric diagram clearly illustrates how air changes under different temperature and humidity conditions, as well as the heat and moisture exchange relationships between them. Based on the temperature and humidity requirements for plant growth, we set different target temperature and humidity ranges in the control system. When sensors monitor the actual temperature and humidity data in the greenhouse, the system analyzes the data's position on the psychrometric diagram to determine the difference between the current air state and the target state, and then determines the necessary control measures.

[0105] For example, control strategies vary depending on the season. On hot, sunny days in the summer, with high outdoor temperatures and strong sunlight, the temperature inside the greenhouse tends to rise rapidly. At this point, the system prioritizes turning on all or most of the fans based on the psychrometric diagram. It also increases the water supply to the drencher curtains, allowing the air to pass through them before entering the greenhouse, fully cooling and humidifying it. This rapidly lowers the greenhouse temperature and adjusts the humidity to a high level suitable for summer plant growth, such as 25°C-30°C and 65%-75% relative humidity. On cloudy days, with reduced light intensity, the greenhouse temperature rises less sharply, but humidity may be relatively high. In this case, the system appropriately reduces the water supply to the drencher curtains and, based on actual temperature conditions, intermittently turns on some fans and adjusts ventilation intensity to prevent excessive humidity from affecting plant growth, maintaining the greenhouse temperature between 22°C-28°C and the relative humidity between 60%-70%.

[0106] Plants have different requirements for temperature and humidity at different stages of cultivation. For example, during the seedling stage, plants require relatively high humidity and a relatively stable temperature environment. The system will accurately adjust the operating status of the fans and water curtains based on the isenthalpy and humidity diagram to keep the temperature in the greenhouse at 20°C-25°C and the relative humidity between 70%-80%, providing good conditions for seedling growth. During the maturity stage of the plants, the humidity requirements are relatively lower, and the temperature range can be appropriately relaxed. The system will adjust the control parameters accordingly, reduce the frequency of water curtain use, and maintain a suitable temperature and humidity environment by more finely controlling the number of fans turned on and the ventilation time, ensuring the healthy maturity of the plants.

[0107] To more clearly demonstrate these control logics, we can draw a control flow chart or create a logic table. The control flow chart graphically and intuitively illustrates the entire process from sensor data collection to controller analysis and judgment, and then to the issuance of control instructions to each device, as well as the branching processes under different conditions. The logic table details the specific operating status (such as the number of fans, water curtains, shade nets, etc.) of corresponding equipment under various environmental parameter combinations (such as different temperatures, humidity, light intensity, etc.), such as the number of open devices, operating time, and adjustment range. This makes it easier for operators to understand and view the system's control rules and facilitates subsequent maintenance and optimization of the control system.

[0108] It is understood that, compared to flip-up windows and sliding windows, the split aluminum leaf windows of the present invention can remain horizontal with the air inlet when open, significantly increasing the effective air intake area. Actual testing has shown that the effective ventilation area of ​​the present invention is increased by 30% and 50% over flip-up windows and sliding windows, respectively. Due to the increased effective air intake area, the ventilation efficiency of the present invention is also greatly improved. Under the same ventilation conditions, the present invention can more quickly achieve gas exchange and temperature and humidity regulation in the greenhouse, providing a more suitable environment for crop growth. The present invention utilizes an advanced control system that enables remote intelligent control. Users can operate the ventilation system conveniently and quickly through terminal devices such as mobile phones and computers. However, flip-up windows and sliding windows perform poorly in terms of automated control and require manual operation, which is not only inefficient but also prone to operational errors. The split aluminum leaf windows of the present invention are located behind the water curtain and take up little space when open, which does not affect operations inside and outside the greenhouse. They also make the exterior structure of the greenhouse more simple and beautiful. However, flip-up windows and sliding windows take up a large amount of space when open, affecting the overall aesthetics of the greenhouse.

[0109] For example, an agricultural park built a large greenhouse for growing vegetables and flowers. The greenhouse covers an area of ​​2,000 square meters and is 6 meters high. To improve the greenhouse's ventilation efficiency and environmental control capabilities, the park decided to adopt the greenhouse water curtain ventilation system of the present invention.

[0110] Based on the actual size and requirements of the greenhouse, appropriate water curtains and wind screens 33 were selected. The water curtain is 20 meters long and 4 meters high and is installed on one side of the greenhouse. The wind screens 33 have 12 blades, each 10 centimeters wide, and are mounted within a frame behind the water curtain. A high-performance motor and advanced control system are installed. The motor has a power of 1.5 kilowatts, capable of raising and lowering the blades. The control system utilizes wireless communication technology, allowing users to remotely control the ventilation system via their mobile phone.

[0111] In hot summer weather, when the outdoor temperature is above 35°C, the temperature inside the greenhouse can be reduced to around 25°C through the ventilation system of the present invention, with a significant cooling effect. At the same time, the air circulation speed in the greenhouse is accelerated, and the ventilation efficiency is greatly improved.

[0112] Users can conveniently and quickly operate the ventilation system anytime and anywhere via their mobile phone. For example, when out and about, users can remotely activate the ventilation system via their mobile phone to adjust the temperature in the greenhouse and create a good environment for crop growth.

[0113] The greenhouse water curtain ventilation system of the present invention has a simple and beautiful external structure, which complements the overall style of the greenhouse. The combination of split aluminum leaf windows and water curtains makes the overall appearance of the greenhouse more coordinated, providing favorable conditions for agricultural tourism.

[0114] Through effective ventilation and temperature and humidity control, the crop growth environment in the greenhouse has been greatly improved, accelerating the accumulation of organic matter by crops and increasing yields by more than 20%.

[0115] The ventilation system of the present invention uses intelligent control and can automatically adjust its operating status according to the actual situation of the greenhouse, avoiding energy waste. Compared with traditional ventilation methods, energy consumption is reduced by more than 30%.

[0116] The intelligent remote control feature allows users to operate the ventilation system anytime and anywhere, reducing the need for manual operation. Compared with traditional ventilation methods, labor costs are reduced by more than 50%.

[0117] The greenhouse water curtain ventilation system of the present invention achieves advantages such as increased greenhouse ventilation efficiency, intelligent remote control while reducing space occupancy, and a more concise and beautiful external structure by installing intelligently controllable wind windows on the rear side of the water curtain. The system has the characteristics of a large effective ventilation area, high ventilation efficiency, automatic control, and good aesthetics, and can provide an effective solution for ventilation, cooling, and humidity control in agricultural greenhouses. In actual application, the system has demonstrated good performance and economic benefits and has broad application prospects. Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

[0118] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications all fall within the protection scope of the present invention.

Claims

1. A temperature control system for a glass greenhouse, wherein the glass greenhouse comprises a foundation wall and a greenhouse body disposed above the foundation wall, wherein the greenhouse body and the foundation wall form an interior space for accommodating the cultivation of tall plants, and the temperature control system is disposed in the greenhouse body, characterized in that: The temperature regulation system comprises: Multiple water curtains and multiple fans are provided in the greenhouse main body, and the water curtains and the fans are provided back to back on both sides of the greenhouse main body, the glass wall of the greenhouse main body includes a wall bottom, a wall top and a wall waist located between the wall bottom and the wall top, wherein the water curtains and the fans of the temperature control system are installed at the wall waist of the glass wall, when the temperature control system is working, the outside air enters the internal space of the greenhouse main body through the water curtains carrying water vapor, wherein the water vapor circulates in the internal space of the greenhouse main body and carries heat and is discharged from the greenhouse main body through the fans to reduce the temperature inside the greenhouse main body.

2. The temperature control system according to claim 1, wherein the water curtain and the fan of the temperature control system are installed at 1 / 2 to 2 / 3 of the overall height of the greenhouse body.

3. The temperature control system according to claim 2, wherein the temperature control system further comprises a plurality of wind windows, wherein the wind windows are arranged on the glass wall of the greenhouse body, and the wind windows are arranged adjacent to the water curtain of the temperature control system, and the wind windows can be opened and closed to control the entry of outside air into the greenhouse body and the direction of airflow; the horizontal distance between the wind windows and the water curtain is between 30m and 45m, and the vertical height difference is within 0.4m.

4. The temperature control system according to claim 3, wherein the wind window is arranged on the inner side of the water curtain, that is, the wind window is located inside the greenhouse body, and the external air flow carries water vapor through the water curtain through the wind window to reach the internal space of the greenhouse body.

5. The temperature control system according to claim 3, wherein the wind window is arranged on the outside of the water curtain, that is, the wind window is located outside the greenhouse body, and the external air flow carries water vapor through the wind window and the water curtain to reach the internal space of the greenhouse body.

6. The temperature control system according to claim 4 or 5, wherein the wind window further comprises a frame, a series of blades arranged on the frame, and a connecting rod mechanism for driving the blades to move, wherein the blades are movably arranged on the frame, and the connecting rod mechanism is connected to the blades, and the connecting rod mechanism can drive the blades to flip.

7. The temperature control system according to claim 6, wherein the blade is pivotally arranged on the inner side of the frame, wherein the connecting rod mechanism includes a transmission rod and a plurality of connecting rod transmission parts, wherein one end of the connecting rod transmission part is connected to the transmission rod, and the other end of the connecting rod transmission part is connected to the blade, and when the transmission rod moves upward or downward, the transmission rod drives the blade to flip upward or downward through the connecting rod transmission part.

8. Glass greenhouse, characterized in that include: A foundation wall, a greenhouse body arranged above the foundation wall, and a temperature control system as described in any one of claims 1 to 7, wherein the greenhouse body and the foundation wall form an internal space for accommodating the cultivation of tall plants, wherein the temperature control system includes a plurality of water curtains and a plurality of fans, the water curtains and the fans are arranged on the greenhouse body, and the water curtains and the fans are arranged back to back on both sides of the greenhouse body. 9 . The glass greenhouse according to claim 8 , wherein the greenhouse body comprises glass walls and a glass roof, wherein the glass roof is arranged on top of the glass walls and supported by the glass walls.

10. The glass greenhouse according to claim 9, wherein the glass wall further comprises a front wall, a back wall, and side walls located on both sides of the front wall and the back wall, wherein the front wall, the back wall, the side walls, and the glass ceiling form a closed greenhouse space, the water curtain is arranged on the front wall, and the fan is arranged on the back wall; or the water curtain is arranged on the back wall, and the fan is arranged on the front wall.

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