Solar soil heat storage and supply device for solar greenhouse heat recovery and air dehumidification
By combining solar collectors and soil heat storage devices with a fresh air total heat recovery device, the problems of heat loss and humidity control in solar greenhouses in northern regions have been solved, achieving heat recovery and humidity reduction, thereby improving the crop growth environment and production efficiency.
Patent Information
- Application Number
- CN202423258405.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In the cultivation process of existing solar greenhouses in northern regions, ventilation leads to heat loss and waste, increases operating costs, and makes it difficult to effectively control temperature and humidity, thus affecting crop growth.
The system employs solar collectors, soil heat storage and heating devices, and fresh air total heat recovery devices. It heats the air with solar energy and transports it to the underground soil for heat exchange, reducing air humidity and recovering heat energy. It also uses low-temperature condensation technology to condense the moisture in the air, thus achieving heat recovery and humidity regulation.
This technology enables heat recovery and humidity control in solar greenhouses, reducing energy consumption, minimizing heat waste, improving the crop growth environment, and increasing production efficiency and profits.
Smart Images
Figure CN223885831U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the fields of solar greenhouses, solar heating, air environment control (temperature, humidity, oxygen content and exhaust gas discharge, etc.) and heat energy recovery technology, and in particular to a solar soil storage and heating device for heat recovery and air dehumidification in solar greenhouses. Background Technology
[0002] In existing technologies, soil water evaporation and crop transpiration during the planting process affect the air moisture content inside the greenhouse, increasing the relative humidity and causing a decline in air quality, which seriously affects normal planting. Simultaneously, under solar radiation, the air and other substances in the greenhouse absorb solar energy and gain heat, resulting in high temperature and humidity during the day and low temperature and high relative humidity at night in facility agriculture in cold northern regions. During the day, the greenhouse temperature increases due to solar heat gain, but so does the humidity, requiring ventilation for cooling and dehumidification. At night, the greenhouse temperature needs to be increased to reduce the relative humidity and meet planting requirements.
[0003] The applicant has discovered that the existing technology has at least the following technical problems: Currently, the ventilation and air exchange of solar greenhouses are carried out through natural convection and mechanical pressurization to reduce humidity and lower the temperature inside the greenhouse. Although this can solve the ventilation and air exchange function, it brings new disadvantages, namely, a large amount of heat is lost and wasted inside the greenhouse, increasing the heat load of the solar greenhouse and increasing the heating and operating costs of the solar greenhouse.
[0004] To address this issue, methods for increasing soil temperature and dehumidifying the air inside solar greenhouses at night primarily utilize underfloor heating, hot air heating, radiator systems, and air conditioning hot air systems. Heat sources mainly include oil-fired fans, electric fans, ultra-low temperature air source heat pumps, ordinary solar collectors, and coal / gas / electric boilers. These methods result in high heat demand and energy consumption, leading to high investment and operating costs, and thus failing to effectively solve the planting challenges of solar greenhouses in northern regions. Utility Model Content
[0005] The purpose of this invention is to provide a solar soil storage and heating device for heat recovery and air dehumidification in solar greenhouses, so as to solve the technical problem of difficult environmental control in solar greenhouses in the prior art.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] This utility model provides a solar soil heat storage and supply device for heat recovery and air dehumidification in a solar greenhouse, comprising a solar collector, a soil heat storage and supply device, and a fresh air total heat recovery device; wherein:
[0008] The solar collectors are arranged on the outside of the greenhouse to convert solar energy into heat energy;
[0009] The soil heat storage and heating device is arranged in the planting soil of the solar greenhouse and is connected to the solar collector.
[0010] The fresh air total heat recovery device is installed inside the solar greenhouse, with one end connected to the solar collector and the other end connected to the soil heat storage and heating device.
[0011] As a further improvement of this utility model, the soil heat storage and heating device includes several underground PVC heat exchange pipes, all of which are connected in parallel and evenly buried in the planting soil.
[0012] As a further improvement of this utility model, the fresh air total heat recovery device includes an exhaust fan, an air intake, an air outlet pipe, an air return pipe, a drainage assembly, and an air supply outlet; wherein:
[0013] The number of exhaust vents is several, and they are evenly arranged inside the greenhouse.
[0014] The exhaust fan is connected to all the air vents through pipes to extract air from the greenhouse.
[0015] One end of the air outlet pipe is connected to the exhaust fan, and the other end is connected to the solar collector;
[0016] One end of the return air pipe is connected to the soil heat storage and heating device through the drainage assembly; the other end of the return air pipe is connected to several air outlets.
[0017] Several of the aforementioned air outlets are evenly arranged inside the greenhouse.
[0018] As a further improvement of this utility model, the exhaust vent is located on the upper part of the sun-facing side of the greenhouse.
[0019] As a further improvement of this utility model, the air outlet is located in the middle of the shaded side of the greenhouse.
[0020] As a further improvement of this utility model, the air outlet has an air outlet direction that is obliquely downward.
[0021] As a further improvement of this utility model, the inlet of the exhaust port is oriented at an upward angle.
[0022] As a further improvement of this utility model, both the exhaust port and the air supply port have a flared shape.
[0023] As a further improvement of this utility model, the drainage assembly includes a one-way automatic drain and an underground drainage channel; wherein:
[0024] The one-way automatic drainer is installed on the air return pipe located on the side of the planting soil;
[0025] The underground drainage channel is located below the one-way automatic drain and is connected to the one-way automatic drain.
[0026] This utility model of a solar soil heat storage and supply device for heat recovery and air dehumidification in a solar greenhouse consists of a solar collector (main heat source), a soil heat storage and supply device, and a fresh air total heat recovery device. The above three devices are organically combined to form a livestock house environment control device. Powered by an exhaust fan, the high humidity and hot air in the solar greenhouse is heated by the solar collector to increase the temperature and improve the air temperature quality. High-temperature air is transported underground to exchange heat with the planting soil, raising the soil temperature. At the same time, the air temperature decreases and the relative humidity increases to the condensation saturation point, causing the moisture in the air to condense into water, which is automatically discharged from the system through a one-way drain pipe and seeps into the soil. The cooled, low-humidity air after heat exchange is then sent into the greenhouse, realizing heat recovery and humidity reduction. This not only meets the basic requirements of heat recovery and daytime cooling and dehumidification in greenhouses, but also achieves energy conservation and emission reduction, ultimately increasing profits. It solves the problem in northern cold regions where low winter temperatures, low soil temperatures in greenhouses, and high relative humidity at night affect crop root growth, introduce diseases, and ultimately impact overall crop development, yield, and quality. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the system composition of the solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse.
[0029] Figure 2 This is a three-dimensional structural schematic diagram (I) of the solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse.
[0030] Figure 3 This is a three-dimensional structural schematic diagram (II) of the solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse.
[0031] In the diagram: 1. Solar greenhouse; 2. Planting soil; 3. Solar greenhouse frame; 4. Solar collector; 5. Air outlet pipe; 6. Underground PVC heat exchange pipe; 7. Air inlet; 8. Air outlet; 9. Underground ventilation pipe; 10. Exhaust fan; 11. Return air pipe; 12. One-way automatic drain; 13. Underground drainage ditch. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0033] like Figures 1-3 As shown, this utility model provides a solar soil heat storage and supply device for heat recovery and air dehumidification in a solar greenhouse, including a solar collector 4, a soil heat storage and supply device, and a fresh air total heat recovery device; wherein:
[0034] Solar collector 4 is arranged on the outside of the solar greenhouse 1 to convert solar energy into heat energy; specifically, solar collector 4 is arranged on the sun-facing side of the solar greenhouse 1; in this embodiment, considering the length of the solar greenhouse 1, two sets of solar soil storage and heating devices for solar greenhouse heat recovery and air dehumidification are arranged; the two sets of solar soil storage and heating devices for solar greenhouse heat recovery and air dehumidification are symmetrically arranged.
[0035] The soil heat storage and heating device is arranged in the planting soil 2 of the solar greenhouse 1 and is connected to the solar collector 4; low temperature soil heat exchange technology is used to store the air heat energy in the greenhouse into the soil.
[0036] The fresh air total heat recovery device is installed inside the solar greenhouse 1, with one end connected to the solar collector 4 and the other end connected to the soil heat storage and heating device.
[0037] The solar soil heat storage and supply device collects solar energy through a solar collector 4 and converts it into efficient hot air to heat the underground soil, raising the ground temperature and realizing the functions of soil heat storage and ground temperature increase to meet the needs of agricultural planting. The solar soil heat storage and supply device can store as much of the solar heat gained by the greenhouse 1 during the day into the planting soil 2, and minimize the relative humidity inside the greenhouse (and reduce the water content in the air), reduce or avoid ventilation of the greenhouse 1, and reduce and avoid energy waste. This utility model is based on the solar soil heat storage and supply device and combines low temperature heat exchange and condensation technology to solve the environmental control problem of the greenhouse 1.
[0038] As an optional embodiment of this utility model, the soil heat storage and heating device includes several underground PVC heat exchange pipes 6, all of which are connected in parallel and evenly buried in the planting soil 2.
[0039] Furthermore, such as Figure 2 and Figure 3 As shown, the fresh air total heat recovery device includes an exhaust fan 10, an air intake 8, an air outlet 5, an air return pipe 11, a drainage assembly, and an air supply vent 7; wherein:
[0040] There are several exhaust vents 8, which are evenly arranged inside the greenhouse 1; specifically, the exhaust vents 8 are evenly arranged along the length of the greenhouse 1.
[0041] The exhaust fan 10 is connected to all the air vents 8 through pipes to extract the air from the greenhouse 1;
[0042] One end of the air outlet pipe 5 is connected to the exhaust fan 10, and the other end is connected to the solar collector 4, which is used to draw the high temperature and high humidity air extracted from the solar greenhouse 1 into the solar collector 4.
[0043] One end of the return air pipe 11 is connected to the soil heat storage and heating device through a drainage component; the other end of the return air pipe 11 is connected to several air outlets 7.
[0044] Several air outlets 7 are evenly arranged inside the solar greenhouse 1.
[0045] This device collects solar heat inside the solar greenhouse 1, while reducing the relative humidity of the air inside the greenhouse and increasing the heat storage capacity of the soil, thereby reducing the number of solar collectors 4 that provide heat energy to the soil, and thus reducing the overall cost and investment of the solar soil heat storage and supply system.
[0046] Specifically, the air supply outlet 7 extends along the length of the greenhouse 1; and the underground PVC heat exchange pipe 6 is connected to all the air supply outlets 7 through the underground ventilation pipe 9 and the return air pipe 11.
[0047] This utility model uses a multi-vent system for both exhaust and supply of air, which creates multiple micro-circulations within the building, generating multiple air convections, thereby achieving the air convection function within the building.
[0048] Considering that hot and humid air tends to rise to the top, in this embodiment, the exhaust vent 8 is located on the upper part of the sun-facing side of the greenhouse 1.
[0049] Considering that the return air location cannot be close to the exhaust vent 8 to avoid drawing the return air out during exhaust, in this embodiment, the air supply vent 7 is located in the middle of the shaded side of the greenhouse 1.
[0050] Furthermore, in this embodiment, the air outlet 7 is oriented diagonally downwards to facilitate the delivery of return air to the lower part of the greenhouse 1, which not only avoids the exhaust vent 8 as much as possible, but also helps the return gas to mix with the air in the greenhouse 1.
[0051] Furthermore, the inlet of exhaust vent 8 is angled upwards.
[0052] In order to improve the efficiency of ventilation, in this embodiment, both the exhaust port 8 and the air supply port 7 are funnel-shaped.
[0053] like Figure 1 As shown, the drainage assembly includes a one-way automatic drainer 12 and an underground drainage channel 13; wherein:
[0054] One-way automatic drainer 12 is installed on the return air pipe 11 located on both sides of the planting soil; low temperature soil condensation technology is used to condense the water vapor in the greenhouse air into the soil, thereby reducing the humidity inside the greenhouse.
[0055] The underground drainage channel 13 is located below the one-way automatic drain 12 and is connected to the one-way automatic drain 12.
[0056] This utility model discloses a solar soil heat storage and supply device for heat recovery and air dehumidification in a solar greenhouse 1. The device consists of a solar collector 4 (main heat source), a soil heat storage and supply device, and a fresh air total heat recovery device. The three devices are organically combined to form a pasture environment control device. The device combines low-temperature heat exchange technology with solar soil heat storage and supply technology to achieve the function of regulating the ground temperature and air environment of the pasture, so as to meet the needs of agricultural winter production. Power is provided by the exhaust fan 10 to heat the high humidity hot air in the solar greenhouse 1 through the solar collector 4 to increase the temperature and improve the air temperature quality. High-temperature air is transported to the underground planting soil 2 for heat exchange, raising the soil temperature. At the same time, the air temperature decreases and the relative humidity increases to the condensation saturation point, causing the moisture in the air to condense into water, which is discharged from the system through an automatic one-way drain and seeps into the soil. The low-temperature, low-humidity air after heat exchange is sent into the solar greenhouse 1, realizing heat recovery and humidity reduction in the solar greenhouse 1. This not only meets the basic requirements of heat recovery and daytime cooling and dehumidification in the solar greenhouse 1, but also achieves energy conservation and emission reduction functions, ultimately increasing profits. This solves the problem in northern cold regions where low winter temperatures, low soil temperatures in the solar greenhouse 1, and high relative humidity at night affect crop root growth, introduce diseases, and ultimately affect the overall development and growth of crops, thus impacting yield and quality.
[0057] This utility model also features a simple structure and, when combined with solar energy and soil heat storage, enables the regulation of ground temperature and air environment.
[0058] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.
[0059] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0062] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0064] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse, characterized in that, This includes solar collectors, soil thermal storage and heating devices, and fresh air total heat recovery devices; among which: The solar collectors are arranged on the outside of the greenhouse to convert solar energy into heat energy; The soil heat storage and heating device is arranged in the planting soil of the solar greenhouse and is connected to the solar collector. The fresh air total heat recovery device is installed inside the solar greenhouse, with one end connected to the solar collector and the other end connected to the soil heat storage and heating device.
2. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 1, characterized in that, The soil heat storage and heating device includes several underground PVC heat exchange pipes, all of which are connected in parallel and evenly buried in the planting soil.
3. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 1, characterized in that, The fresh air total heat recovery device includes an exhaust fan, an air intake, an air outlet pipe, an air return pipe, a drainage assembly, and an air supply outlet; wherein: The number of exhaust vents is several, and they are evenly arranged inside the greenhouse. The exhaust fan is connected to all the air vents through pipes to extract air from the greenhouse. One end of the air outlet pipe is connected to the exhaust fan, and the other end is connected to the solar collector; One end of the return air pipe is connected to the soil heat storage and heating device through the drainage assembly; the other end of the return air pipe is connected to several air outlets. Several of the aforementioned air outlets are evenly arranged inside the greenhouse.
4. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 3, characterized in that, The exhaust vent is located on the upper part of the sun-facing side of the greenhouse.
5. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 3, characterized in that, The air outlet is located in the middle of the shaded side of the greenhouse.
6. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 3, characterized in that, The air outlet is directed downwards at an angle.
7. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 3, characterized in that, The air vent has an inlet that faces upwards at an angle.
8. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 3, characterized in that, Both the exhaust vent and the air supply vent have a flared shape.
9. The solar soil storage and heating device for heat recovery and air dehumidification in a solar greenhouse according to claim 3, characterized in that, The drainage system includes a one-way automatic drain and an underground drainage channel; wherein: The one-way automatic drainer is installed on the air return pipe located on the side of the planting soil; The underground drainage channel is located below the one-way automatic drain and is connected to the one-way automatic drain.