Solar heat collection and active heat storage and release system for greenhouse
The solar active heat storage and release system using water bags and storage bladders solves the problem of insufficient heating in greenhouses during winter, achieving energy-saving and environmentally friendly heating effects and reducing production and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-03-13
AI Technical Summary
In winter, greenhouses lose heat due to lack of solar radiation and low temperatures at night, which affects crop growth. Existing technologies such as fuel heating are not environmentally friendly, solar collectors are expensive and complex to maintain, and open-type water bag circulation causes significant heat loss and increases humidity.
The system uses water bags to absorb solar energy and store it in water storage bladders. The heat energy is then released through a water pump. Combined with temperature sensors and controllers, it achieves active heat storage and release, reducing energy consumption and maintaining stable humidity.
It achieves energy-saving and environmentally friendly greenhouse heating, reduces production costs and maintenance complexity, avoids increased humidity, and solves the problem of insufficient heating in winter.
Smart Images
Figure CN223987478U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of greenhouse technology, and in particular to a solar energy collection and active heat storage system for greenhouses. Background Technology
[0002] In winter, although solar radiation and higher outside temperatures during the day can help maintain the temperature inside the greenhouse, the lack of solar radiation at night, coupled with lower outside temperatures, leads to a significant loss of heat and a noticeable drop in temperature inside the greenhouse. This can cause problems such as condensation buildup, which can affect crop growth and lead to reduced yields or frost damage to plants.
[0003] Some greenhouses on the market use fuel for heating, which is not energy-saving or environmentally friendly; others use solar collectors to store and release heat, but the initial cost and maintenance cost of solar collectors are high, the investment payback period is long, and the installation and maintenance are relatively complicated; still others use open-type water bag circulation heating, but open-type water bag circulation heating has a large heat loss and increases the humidity in the greenhouse, making plants more susceptible to diseases and pests, which is not conducive to the growth of plants in the greenhouse. Utility Model Content
[0004] This utility model provides an active solar thermal energy collection and storage system for greenhouses. The system uses water in a water bag to absorb solar energy and store it in a water storage bladder. When needed, the high-temperature water in the storage bladder releases heat energy through the water bag, reducing the energy consumed by fuel heating and achieving energy-saving and environmentally friendly effects. It does not affect the humidity inside the greenhouse and effectively solves the problem of insufficient heating in greenhouses at night during winter.
[0005] The above-mentioned objective of the utility model is achieved through the following technical solution:
[0006] An active solar thermal energy storage and release system for greenhouses includes a sealed water bag and a sealed water storage bladder. The water bag has an inlet and an outlet. The water storage bladder is connected to a water supply pipe. The inlet is connected to the water supply pipe, and the outlet is connected to an outlet pipe. The other end of the outlet pipe is connected to the water storage bladder. A water pump is connected to the water supply pipe. A first temperature sensor is installed inside the water bag, and a second temperature sensor is installed inside the water storage bladder. The first temperature sensor, the second temperature sensor, and the water pump are electrically connected to a controller.
[0007] In the aforementioned active solar thermal storage and release system for greenhouses, the water bag includes a bag body, an inlet located at the upper part of the bag body, an outlet located at the lower end of the bag body, and multiple isolation strips spaced along the vertical direction on both sides of the inner wall of the bag body. The length of each isolation strip is less than the width of the bag body, and the multiple isolation strips form a serpentine water flow channel.
[0008] In the aforementioned greenhouse solar thermal collection and active heat storage system, the bag body is made of PVC material, and a hanging strap is fixedly connected to the upper end of the bag body, with hanging holes provided on the hanging strap.
[0009] In the aforementioned active solar thermal energy storage and release system for greenhouses, the upper part of the bag body is connected to a manual exhaust valve.
[0010] In the aforementioned active solar thermal storage and release system for greenhouses, the water storage bladder is made of knife-coated cloth, the outer side of the water storage bladder is provided with an insulation layer, and the outer side of the water storage bladder is provided with an installation strip along the vertical direction, with installation holes provided on the installation strip.
[0011] The aforementioned greenhouse solar thermal collection and active heat storage system includes an insulation layer comprising an ultra-fine glass wool layer and an aluminum foil layer arranged from the inside out.
[0012] In the aforementioned active solar thermal storage and release system for greenhouses, the water storage bladder is buried in the soil of the greenhouse, and the mounting strip on the outside of the water storage bladder is fixedly connected to the support buried in the soil of the greenhouse through the mounting hole.
[0013] In the aforementioned active solar thermal storage and release system for greenhouses, the top of the water storage bladder is provided with a water inlet, which is connected to a water supply pipe.
[0014] In the aforementioned active solar thermal storage and release system for greenhouses, the upper part of the water storage bladder is provided with an overflow port, and the lower end of the water storage bladder is provided with a drain port, wherein the overflow port and the drain port are respectively connected to a drain pipe.
[0015] In the aforementioned active solar thermal storage and release system for greenhouses, an electric heating rod is installed inside the water storage bladder, and the electric heating rod is electrically connected to a controller.
[0016] In summary, the beneficial technical effects of this utility model are as follows:
[0017] This invention utilizes a water-filled bag to absorb solar energy. During the day, the circulating water absorbs solar radiation and stores the high-temperature water in a storage tank. At night, a water pump circulates the high-temperature water from the storage tank back to the water bag, releasing heat and thus raising the greenhouse temperature. This system is low in production cost, easy to install and maintain, occupies little greenhouse space, is energy-efficient and environmentally friendly, does not affect the humidity inside the greenhouse, and effectively solves the problem of insufficient nighttime heating in greenhouses during winter. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the structure of the water bag of this utility model.
[0020] The diagram shows: 1. Water bag; 11. Bag body; 111. Inlet; 112. Outlet; 12. Separator strip; 13. Hanging strap; 131. Hanging hole; 14. Manual air vent valve; 15. First temperature sensor; 2. Water storage bladder; 21. Mounting strap; 211. Mounting hole; 22. Water inlet; 221. Water inlet pipe; 23. Overflow port; 24. Drain port; 25. Second temperature sensor; 3. Water supply pipe; 31. Water pump; 4. Outlet pipe; 41. Air vent valve; 42. Inspection valve; 5. Drain pipe; 6. Electric heating rod; 7. Shut-off valve. Detailed Implementation
[0021] The following is in conjunction with the appendix Figure 1 , 2 The present invention will be described in further detail below.
[0022] like Figure 1 As shown, a greenhouse solar thermal collection and active heat storage system includes a sealed water bag 1 and a sealed water storage bladder 2. The water bag 1 has an inlet 111 and an outlet 112. The water storage bladder 2 is connected to a water supply pipe 3. The bottom end of the water supply pipe 3 is close to the bottom surface of the water storage bladder 2. The inlet 111 is connected to the water supply pipe 3, and the outlet 112 is connected to an outlet pipe 4. The other end of the outlet pipe 4 is connected to the water storage bladder 2. A water pump 31 is connected to the water supply pipe 3. A first temperature sensor 15 is installed inside the water bag 1, and a second temperature sensor 25 is installed inside the water storage bladder 2. The first temperature sensor 15, the second temperature sensor 25, and the water pump 31 are electrically connected to a controller.
[0023] When using this system, the water bag 1 can be hung on one side of the greenhouse's light-transmitting film to ensure that sufficient light can pass through the film and shine on the water bag 1. The water medium inside the water bag 1 can absorb solar energy, thereby increasing the temperature of the water medium flowing out of the water bag 1. The high-temperature water medium flows into the water storage bladder 2 for storage.
[0024] like Figure 2 As shown, specifically, the water bag 1 in this embodiment includes a bag body 11, an inlet 111 is located at the upper part of the bag body 11, and an outlet 112 is located at the lower end of the bag body 11. Multiple isolation strips 12 are spaced apart along the vertical direction on both sides of the inner wall of the bag body 11. The length of the isolation strips 12 is less than the width of the bag body 11. The multiple isolation strips 12 form a serpentine water flow channel. The serpentine dotted line in the bag body 11 is the water flow channel.
[0025] By setting up multiple isolation strips 12 to form water flow channels, the retention time of the water medium in the water bag 1 can be increased, the absorption of solar radiation energy by the water medium in the water bag 1 can be increased, and the temperature of the water medium flowing out of the water bag 1 can be guaranteed to meet the requirements.
[0026] In one embodiment, the bag body 11 is made of PVC material, and a hanging strap 13 is fixedly connected to the upper end of the bag body 11. The bag has multiple spaced hanging holes 131. Through the hanging holes 131 on the hanging strap 13, the water bag 1 can be suspended on the side of the light-transmitting film near the greenhouse. The use of PVC material makes the water bag 1 flexible, which facilitates the absorption of solar energy by the water bag 1, reduces the cost of the water bag, facilitates installation and maintenance, and reduces the space occupied in the greenhouse.
[0027] In this embodiment, the isolation strip 12 can be formed inside the water bag 1 by PVC hot-melt method.
[0028] To prevent the water medium from being blocked by the gas generated inside the bag body 11, a manual exhaust valve 14 is connected to the upper part of the bag body 11. The gas inside the bag body 11 is discharged through the manual exhaust valve 14 to ensure the smooth flow of the water medium.
[0029] In one embodiment, an air vent valve 41 is provided on the water outlet pipe 4. When there is gas in the water outlet pipe 4, the gas in the water outlet pipe 4 can be discharged through the air vent valve 41 to ensure the smooth flow of water medium in the water outlet pipe 4.
[0030] To improve the system's efficiency in absorbing solar energy per unit time, multiple water bags 1 can be connected in series. That is, the water inlet pipe 3 is connected to the water inlet 111 of multiple water bags 1, and the water outlet pipe 4 is connected to the water outlet 112 of multiple water bags 1. In this embodiment, three water bags 1 are connected in series.
[0031] In this embodiment, the water storage bladder 2 is made of soft, knife-coated cloth. The outer side of the water storage bladder 2 is provided with an insulation layer. The outer side of the water storage bladder 2 is provided with an installation strap 21 along the vertical direction. The installation strap 21 is provided with multiple spaced installation holes 211.
[0032] Specifically, the insulation layer consists of an ultra-fine glass wool layer and an aluminum foil layer arranged from the inside out. The insulation layer can effectively reduce the heat loss of the water medium inside the water storage bladder 2.
[0033] In order to reduce the space occupied by the water storage bag 2 in the greenhouse, in one embodiment, the water storage bag 2 is buried in the soil of the greenhouse, and the mounting strip 21 on the outside of the water storage bag 2 is fixed to the support buried in the greenhouse soil through the mounting hole 211 to ensure the stability of the inner cavity space of the water storage bag 2.
[0034] In one embodiment, in order to replenish the water medium in the water storage bladder 2, a water inlet 22 is provided at the top of the water storage bladder 2. The water inlet 22 is connected to a water supply pipe 221, which is connected to a water source. Through the water supply pipe 221, the water medium can be replenished into the water storage bladder 2 in a timely manner.
[0035] In one embodiment, the upper part of the water storage bladder 2 is provided with an overflow port 23, and the lower end of the water storage bladder 2 is provided with a drain port 24. The overflow port 23 and the drain port 24 are respectively connected to the drain pipe 5, and a shut-off valve 7 is provided on the pipeline between the drain port 24 and the drain pipe 5.
[0036] When the water level in the water storage bladder 2 exceeds the overflow port 23, the water can be discharged into the sewer through the drain pipe 5. When the water storage bladder 2 needs to be cleaned or repaired, the shut-off valve 7 can be opened, and the water in the water storage bladder 2 can be discharged into the sewer through the shut-off valve 7 and the drain pipe 5.
[0037] To facilitate system maintenance, a maintenance valve 42 is installed on the water outlet pipe 4.
[0038] To compensate for the inability of sunlight to heat the water in the water bag 1 under extreme weather conditions, an electric heating rod 6 is installed inside the water storage bladder 2. The electric heating rod 6 is electrically connected to a controller. The controller can activate the electric heating rod 6 to heat the water in the water storage bladder 2. The second temperature sensor 25 in the water storage bladder 2 transmits temperature information to the controller. When the temperature transmitted by the second temperature sensor 25 reaches the set value, the controller controls the electric heating rod 6 to stop working.
[0039] The system operates as follows: Water bag 1 is suspended from the back wall of the greenhouse, near the light-transmitting film. The first temperature sensor 15 transmits temperature information to the controller. When the temperature detected by the first temperature sensor 15 is greater than the set value, such as when the detected temperature is ≥50℃, it indicates that the light meets the conditions for heating the water medium in water bag 1. The controller then controls the water pump 31 to start. The cold water medium in water storage bladder 2 is pressurized and enters water bag 1 through water pump 31. Water pump 31 can be a variable frequency water pump. The controller controls the flow rate of water pump 31. The water medium in water bag 1 flows evenly and slowly through the water flow channel in water bag 1, allowing the cold water medium to fully absorb the radiated solar energy. The cold water medium absorbs heat energy and transforms into a high-temperature water medium, finally flowing back to water storage bladder 2. This cycle repeats, allowing water storage bladder 2 to store high-temperature water medium, achieving the purpose of storing energy through solar energy. When the temperature information transmitted to the controller by the second temperature sensor 25 reaches the set value, the controller controls the water pump 31 to stop working.
[0040] When sunlight is insufficient to heat the water medium in water bag 1, or in extreme weather conditions, if it is necessary to heat the greenhouse, the electric heating rod 6 can be activated by the controller to raise the temperature of the water medium in water storage bag 2 through electric heating.
[0041] After the high-temperature water medium is stored in the water storage bladder 2, when heating is needed on cold winter nights, the water pump 31 is started by the controller. The water pump 31 delivers the high-temperature water medium in the water storage bladder 2 to the water bag 1. The hot water medium in the water bag 1 dissipates heat into the greenhouse, providing heat to the greenhouse and ensuring that the temperature of the greenhouse reaches the required level.
[0042] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.
Claims
1. A solar energy heat collecting active heat storage and release system for a greenhouse, characterized in that, The application relates to a closed water bag and a closed water storage bag, the water bag is provided with a water inlet and a water outlet, a water storage bag is connected with an upper water pipe, the water inlet is connected with the upper water pipe, the water outlet is connected with a water outlet pipe, the other end of the water outlet pipe is connected with the water storage bag, and a water pump is connected with the upper water pipe; a first temperature sensor is arranged in the water bag, a second temperature sensor is arranged in the water storage bag, and the first temperature sensor, the second temperature sensor and the water pump are electrically connected with a controller.
2. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 1, characterized in that, The water bag comprises a bag body, the water inlet is arranged at the upper portion of the bag body, the water outlet is arranged at the lower end of the bag body, a plurality of isolation strips are arranged on the inner wall of the bag body and are spaced apart in the up-down direction, the length of the isolation strips is smaller than the width of the bag body, and the plurality of isolation strips form a serpentine water flow channel.
3. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 2, characterized in that, The bag body is made of PVC material, a hanging belt is fixedly connected with the upper end of the bag body, and a hanging hole is arranged on the hanging belt.
4. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 2, characterized in that, A manual exhaust valve is arranged at the upper portion of the bag body.
5. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 1, characterized in that, The water storage bag is a knife scraping cloth, an insulating layer is arranged outside the water storage bag, and a mounting belt is arranged outside the water storage bag in the up-down direction.
6. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 5, characterized in that, The insulating layer comprises an ultrafine glass cotton layer and an aluminum foil layer arranged from inside to outside.
7. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 5, characterized in that, The water storage bag is buried in the soil of a greenhouse, and the mounting belt outside the water storage bag is fixedly connected with a support buried in the soil of the greenhouse through the mounting hole.
8. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 1, characterized in that, A water supplementing port is arranged at the top of the water storage bag, and the water supplementing port is connected with a water supplementing pipe.
9. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 1, characterized in that, An overflow port is arranged at the upper portion of the water storage bag, and a water draining port is arranged at the lower end of the water storage bag, and the overflow port and the water draining port are respectively connected with a water draining pipe.
10. The solar energy heat collecting and actively heat storing and releasing system for a greenhouse according to claim 1, characterized in that, An electric heating rod is arranged in the water storage bag, and the electric heating rod is electrically connected with the controller.