A technology for cooling underground soil, frosting and storing water by using solar energy refrigeration

Abstract

An apparatus for cooling and frosting underground soil mass and storing water by solar refrigeration, including an evaporation section 1 of a solar refrigeration device, a gravity heat pipe 2, condensate 3 of the evaporation section of the gravity heat pipe, a condensation section 4 of the gravity heat pipe, a first connection joint 5, a first pump 6, a second pump 7, the ground 8, an underground condensation and water production structural component 9, soil 18, a second condensate output pipe 19, an access section 20 of a first air and water pipe 14, a return air pipe 21, a check valve 22, condensate 23 of the evaporation section of the solar refrigeration device, an evaporation section 24 of the gravity heat pipe 2, a first condensate output pipe 25, a transition section 26 of the gravity heat pipe 2, an air and water pipe pump 27, a second connection joint 28, and a second air and water pipe 29.

Description

Technical Field

[0001] The present invention belongs to the field of solar refrigeration, and relates to a technology for using solar refrigeration to cool and frost the underground soil and store water, specifically a solar refrigeration technology, in which the evaporation section is located in the underground soil, and the evaporation section cools the surrounding soil and air and uses the condensed water for storing water in the surrounding soil. Background Art

[0002] Although 71% of the earth's surface is covered with water. In fact, 97.5% of the water on the earth is salt water, and only 2.5% is fresh water. And in the fresh water, nearly 70% is frozen in the ice sheets of Antarctica and Greenland, and most of the rest is the moisture in the soil or deep groundwater, which is difficult to exploit for human use. The water from sources such as rivers, lakes, reservoirs and shallow groundwater is relatively easy to exploit for direct human use, but its quantity is less than 1% of the world's fresh water, accounting for about 0.007% of all the water on the earth. Therefore, it is very difficult to completely irrigate the earth's surface soil with surface fresh water.

[0003] So far, there is no practical technical solution to fundamentally solve the problem of underground water resources for the above situation. However, we can improve the water environment near the earth's surface through solar refrigeration technology to ensure the water demand of plants, completely change the desertification or the too low yield of cash crop planting caused by water shortage in arid and semi-arid areas. While greatly improving the greening level of the earth's surface through solar technology, the ecological environment is gradually restored to a better level. At the same time, the green economy developed relying on solar refrigeration will further improve the living conditions and economic level of human beings.

[0004] The technical solution of the present invention is proposed to solve the water content of the plantable soil on the earth's surface, and it stems from the following principle:

[0005] 1. The soil temperature in the depth range of 30 cm to 100 cm below the ground surface is relatively stable in each season, less affected by the daily temperature difference of the air, and has a low soil thermal conductivity. The power consumed for cooling the strata in this depth range by solar cooling is small. If the annual average temperature of the soil in this depth range is reduced by more than 5 °C, the annual evaporation of soil moisture near the ground surface will be greatly reduced, and the moisture near the ground surface will accumulate in the depth range of 20 cm to 100 cm from the ground surface except for the surface layer, providing more moisture for plants. This is the reason why a large number of vegetation and forests are distributed on the shady slopes in water-scarce areas worldwide. The temperature of the soil mass on the shady slopes is low, the evaporation is small and it is humid, and plants have more opportunities to obtain moisture. At the same time, the groundwater resources are relatively rich in areas covered by forests. The plant cover will not only reduce the ground surface temperature, but also reduce the evaporation of the surface soil moisture. At the same time, the plant roots also have strong water storage and water fixation capabilities. Once the underground cooling technology helps to complete the large-area coverage of surface plants, the dependence of this area on solar cooling will be greatly reduced.

[0006] 2. When the temperature of solar cooling is lower than 0 °C, the cooling pipe obtains moisture from the surrounding gas and the ventilation pipe and forms frost on the surface of the cooling pipe. During the thawing season of seasonal frozen soil, the surface of the solar cooling pipe will complete the cycle of frosting and defrosting during the day-night alternation process. The moisture after defrosting irrigates the nearby soil through the diversion structure. Through such a cycle, during the alternation of the four seasons of the year, the characteristic of moisture accumulation in the condensation area will cause a large amount of moisture in the soil mass to continuously accumulate near the condensation layer, meeting the water demand of plant roots.

[0007] On the other hand, using solar cooling to further increase the cold storage capacity of the soil will result in an increase in the depth of seasonal frozen soil in seasonal frozen soil areas, facilitating the reduction of the annual average temperature of the soil mass and the reduction of evaporation.

[0008] 3. The solar underground cooling system is simultaneously laid with water and ventilation pipes. The water and ventilation pipes input moisture for underground frosting. At the same time, the ventilation pipe is also a drip irrigation pipe, which is used to collect surface water during the rainy season while delivering wet and cold air underground to complete underground drip irrigation.

[0009] 4. Since the solar cooling technology has been relatively mature and is currently widely used in solar air conditioners, but the solar refrigerators applied to underground cooling systems are mainly in the wild, and the requirements for the operating conditions of the refrigerators are more relaxed, including the shape, volume, vibration, noise, and working hours of the solar refrigerator, etc. Therefore, it is possible to develop a refrigerator that is more economical and has a higher refrigeration efficiency than traditional technologies, and the cost price can also be greatly reduced, providing a greater development space for the development of solar underground cooling technology. Summary of the Invention

[0010] To achieve the purpose of solar underground refrigeration and water storage, the technical solution adopted by the present invention is as follows:

[0011] A device for cooling and frosting underground soil and storing water by using solar refrigeration technology, including the evaporation section 1 of the solar refrigeration equipment, the gravity heat pipe 2, the condensate 3 of the evaporation section of the gravity heat pipe 2, the condensation section 4 of the gravity heat pipe 2, the first connection joint 5, the first pump 6, the second pump 7, the underground condensation water production structure assembly 9, the deflector 10, the ventilation holes 11, the condensate pipe 13, the first ventilation and water pipe 14, the refrigeration main pipe 15, the ventilation holes 17 of the ventilation and water pipe, the second condensate output pipe 19, the access section 20 of the first ventilation and water pipe 14, the return air pipe 21, the check valve 22, the condensate of the evaporation section of the solar refrigeration equipment 23, the evaporation section 24 of the gravity heat pipe 2, the first condensate output pipe 25, the transition section 26 of the gravity heat pipe 2, the ventilation and water pipe pump 27, the second connection joint 28, and the second ventilation and water pipe 29.

[0012] It is characterized in that: the condensation section 4 of the gravity heat pipe 2 is buried in the condensate 23 of the evaporation section 1 of the solar refrigeration equipment; the part above point a of the gravity heat pipe 2 is the condensation section 4, the part between point a and point b of the gravity heat pipe 2 is the transition section 26, the part below point b of the gravity heat pipe 2 is the evaporation section 24 of the gravity heat pipe 2, the evaporation section 24 of the gravity heat pipe 2 is filled with condensate 3, the return air pipe 21 is arranged on the wall of the transition section 26, and the first condensate output pipe 25 is located at the position close to the bottom of the evaporation section 24 of the gravity heat pipe 2.

[0013] The second pump 7 and the check valve 22 are connected to the return air pipe 21, and the check valve 22 and the second pump 7 are in a parallel relationship and are jointly connected to the return air pipe 21. The return air pipe 21 is connected to the condensate pipe 13 installed in the underground condensation water production structure assembly 9 through the second connection joint 28.

[0014] The first condensate output pipe 25 and the second condensate output pipe 19 are connected together through the first pump 6, and the second condensate output pipe 19 is connected to the condensate pipe 13 installed in the underground condensation water production structure assembly 9 through the first connection joint 5.

[0015] The first ventilation and water pipe 14 is connected to the access section 20 of the first ventilation and water pipe 14 through the first connection joint 5. The access section 20 of the first ventilation and water pipe 14 is connected to the ventilation and water pipe pump 27. The other end of the ventilation and water pipe pump 27 is the access pipe, which is the second ventilation and water pipe 29. The other end of the first ventilation and water pipe 14 is a closed end at the position of the second connection joint 28.

[0016] The underground condensation water production structure assembly 9 is composed of the first ventilation and water pipe 14 arranged in the refrigeration main pipe 15, the condensate pipe 13, and the deflector 10 installed at the lower part of the refrigeration main pipe 15.

[0017] The pipe wall of the described refrigeration main pipe 15 is provided with ventilation holes 16, and water seepage holes 12 are provided at the position where the refrigeration main pipe 15 is connected to the flow guide plate 10.

[0018] The pipe wall of the described first ventilation and water pipe 14 is provided with ventilation holes 17 of the ventilation and water pipe.

[0019] The flow guide plate 10 is provided with ventilation holes 11.

[0020] The described second ventilation and water pipe 29 is spirally wound around the transition section 26 of the gravity heat pipe 2.

[0021] An apparatus for cooling, frosting and storing water in underground soil by solar refrigeration according to the present invention, the top of the gravity heat pipe 2 is the condensation section 4 of the gravity heat pipe 2, the transition section 26 is adjacent below, and the evaporation section 24 is at the lowermost end; the condensation section 4 of the gravity heat pipe 2 is buried in the condensate 23 of the evaporation section 1 of the solar refrigeration device, the evaporation section 24 of the gravity heat pipe 2 is connected to the first condensate output pipe 25, the first condensate output pipe 25 is connected to the motor 6, the motor 6 is connected to the second condensate output pipe 19, the second condensate output pipe 19 is connected to the condensate pipe 13 installed in the underground condensation water production structure assembly 9 through the first connection joint 5, the condensate pipe 13 in the underground condensation water production structure assembly 9 is connected to the return air pipe 21 through the second connection joint 28, a second pump 7 and a check valve 22 are connected to the return air pipe 21, wherein the check valve 22 and the second pump 7 are in a parallel relationship and they are jointly connected to the return air pipe 21, the return air pipe 21 is communicated with the transition section 26 of the gravity heat pipe 2, the above connection relationship constitutes a complete refrigerant circulation path, and the cooling and freezing of the underground soil are realized during the flow and vaporization process of the condensate 3 in the evaporation section of the gravity heat pipe 2 in the above path; the described second ventilation and water pipe 29 is spirally wound around the transition section 26 of the gravity heat pipe 2, the second ventilation and water pipe 29 is connected to the ventilation and water pipe pump 27, the other joint of the ventilation and water pipe pump 27 is connected to the access section 20 of the first ventilation and water pipe 14, the access section 20 of the first ventilation and water pipe 14 is connected to the first ventilation and water pipe 14 through the first connection joint 5, and the other end of the first ventilation and water pipe 14 is a closed end at the position of the second connection joint 28, and the above connection path realizes the introduction of water or wet cold air from the outside into the underground soil, and then it is frosted and defrosted, achieving the purpose of soil water storage; the described underground condensation water production structure assembly 9 is composed of a first ventilation and water pipe 14 arranged inside the refrigeration main pipe 15, a condensate pipe 13 and a flow guide plate 10 installed at the lower part of the refrigeration main pipe 15; the pipe wall of the refrigeration main pipe 15 is provided with ventilation holes 16, and water seepage holes 12 are provided at the position where the refrigeration main pipe 15 is connected to the flow guide plate 10; the pipe wall of the first ventilation and water pipe 14 is provided with ventilation holes 17 of the ventilation and water pipe; the flow guide plate 10 is provided with ventilation holes 11.

[0022] The beneficial effects of the present invention are as follows: It provides a technology that utilizes solar cooling to achieve the purpose of storing water in underground soil, provides abundant water for surface vegetation, and improves the ecological conditions of the earth. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention.

[0024] Figure 2 It is the underground condensation water production structure of the present invention.

[0025] Figure 3 It is a schematic structural diagram of Embodiment 2.

[0026] In the figure: evaporation section 1 of the solar cooling device, gravity heat pipe 2, condensate 3 of the evaporation section of the gravity heat pipe, condensation section 4 of the gravity heat pipe 2, first connection joint 5, first pump 6, second pump 7, ground 8, underground condensation water production structure assembly 9, deflector 10, ventilation holes 11, seepage holes 12, condensation pipe 13, first ventilation and water pipe 14, refrigeration main pipe 15, ventilation holes 16, ventilation holes 17 of the ventilation and water pipe, soil 18, second condensate output pipe 19, access section 20 of the first ventilation and water pipe 14, return air pipe 21, check valve 22, condensate 23 of the evaporation section of the solar cooling device, evaporation section 24 of the gravity heat pipe 2, first condensate output pipe 25, transition section 26 of the gravity heat pipe 2, ventilation and water pipe pump 27, second connection joint 28, second ventilation and water pipe 29. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further describes the structure and its beneficial effects of the present invention in conjunction with the Figure 1 and the Figure 2 drawings.

[0028] Embodiment 1

[0029] A device for cooling and frosting the underground soil mass by solar cooling to store water, as Figure 1As shown in the figure, the top of the gravity heat pipe 2 is the condensation section 4 of the gravity heat pipe 2. Immediately below is the transition section 26, and the lowermost end is the evaporation section 24. The condensation section 4 of the gravity heat pipe 2 is buried in the condensate 23 of the evaporation section 1 of the solar refrigeration device. The evaporation section 24 of the gravity heat pipe 2 is connected to the first condensate output pipe 25. The first condensate output pipe 25 is connected to the motor 6. The motor 6 is connected to the second condensate output pipe 19. The second condensate output pipe 19 is connected to the condensate pipe 13 installed in the underground condensate water production structure assembly 9 through the first connection joint 5. The condensate pipe 13 in the underground condensate water production structure assembly 9 is connected to the return air pipe 21 through the second connection joint 28. A second pump 7 and a one-way valve 22 are connected to the return air pipe 21. The one-way valve 22 and the second pump 7 are in a parallel relationship, and they are jointly connected to the return air pipe 21. The return air pipe 21 is communicated with the transition section 26 of the gravity heat pipe 2. The above connection relationship constitutes a complete refrigerant circulation path. The flow and vaporization process of the condensate 3 in the evaporation section of the gravity heat pipe 2 in the above path realizes the cooling and freezing of the underground soil. The second ventilation and water pipe 29 is spirally wound around the transition section 26 of the gravity heat pipe 2. The second ventilation and water pipe 29 is connected to the ventilation and water pipe pump 27. The other joint of the ventilation and water pipe pump 27 is connected to the access section 20 of the first ventilation and water pipe 14. The access section 20 of the first ventilation and water pipe 14 is connected to the first ventilation and water pipe 14 through the first connection joint 5. The other end of the first ventilation and water pipe 14 is a closed end at the position of the second connection joint 28. The above connection path realizes the introduction of water or wet cold air from the outside into the underground soil, and then is frosted or defrosted, achieving the purpose of soil water storage.

[0030] As Figure 2 shown, the underground condensate water production structure assembly 9 is composed of a first ventilation and water pipe 14 arranged inside the refrigeration main pipe 15, a condensate pipe 13, and a guide plate 10 installed at the lower part of the refrigeration main pipe 15. Ventilation holes 16 are provided on the pipe wall of the refrigeration main pipe 15. Water seepage holes 12 are provided at the position where the refrigeration main pipe 15 is connected to the guide plate 10. Ventilation holes 17 of the ventilation and water pipe are provided on the pipe wall of the first ventilation and water pipe 14. Ventilation holes 11 are provided on the guide plate 10.

[0031] During operation, the solar cooling device starts to operate for cooling. The temperature of the condensate 23 in the evaporation section 2 of the solar cooling device drops. Meanwhile, the gravity heat pipe 2 starts to operate, and the temperature of the condensate 3 in the evaporation section of the gravity heat pipe immediately drops. When the first pump 6 is started, the condensate 3 in the evaporation section of the gravity heat pipe enters the first pump 6 through the first condensate output pipe 25. Further, it enters the second condensate output pipe 19. Then, it enters the condensate pipe 13 installed in the underground condensate water production structure assembly 9 through the first connection joint 5. Then, it enters the return air pipe 21 through the second connection joint 28. Then, it enters the check valve 22. Then, it enters the transition section 26 of the gravity heat pipe 2 through the return air pipe 21. Through the above flow process, the condensate 23 returns to the gravity heat pipe 2 again. Through the above process, the underground heat is brought into the gravity heat pipe 2 and discharged by the solar cooling device through the circulation of the working fluid.

[0032] Next, the first pump 6 stops working and the second pump 7 starts working. The condensate remaining in the pipeline vaporizes due to the decrease in steam pressure in the pipe. The steam enters the return air pipe 21 and then returns to the transition section 26 of the gravity heat pipe 2 through the first pump 6. In the above process, the condensate remaining in the pipe absorbs heat during the vaporization process, and the underground heat is further discharged. Through the continuous circulation of the above process, the underground cooling process of solar energy is realized.

[0033] In addition, when the external air or water at the inlet of the second ventilation and water pipe 29 meets the set conditions, the ventilation and water pipe pump 27 starts to work. The second ventilation and water pipe 29 wound around the transition section 26 of the gravity heat pipe 2 sucks in air or water. After being cooled by the transition section 26 of the gravity heat pipe 2 and then passing through the ventilation and water pipe pump 27, it further enters the access section 20 of the first ventilation and water pipe 14. Then, it enters the first ventilation and water pipe 14. The other end of the first ventilation and water pipe 14 is a closed end at the position of the second connection joint 28. The water or air in the first ventilation and water pipe 14 is discharged into the refrigeration main pipe 15 through the ventilation holes 17 of the ventilation and water pipe. There are ventilation holes 16 on the wall of the refrigeration main pipe 15. There are water seepage holes 12 at the position where the refrigeration main pipe 15 is connected to the guide plate 10. The air in the pipe is discharged into the soil through the ventilation holes 16, and the water in the pipe flows into the guide plate 10 through the water seepage holes 12 and further seeps into the surrounding soil 18. In the above process, the wet cold air introduced from the outside is cooled and frosted, and the moisture enters the surrounding soil during the subsequent defrosting process. In the above process, the water introduced from the outside enters the refrigeration main pipe 15 during the frosting and defrosting process, and the water in the pipe flows into the guide plate 10 through the water seepage holes 12 and further seeps into the surrounding soil 18.

[0034] Embodiment 2

[0035] A device for cooling, frosting and storing water in the underground soil body by solar cooling, as Figure 3As shown, it is characterized in that an opening 30 is provided at the top of the condensation section 4 of the gravity heat pipe 2, and the space of the condensation section 4 of the gravity heat pipe 2 is communicated with the space of the evaporation section 1 of the solar refrigeration device. Other structures and working processes are the same as those in Embodiment 1.

Claims

1. A device for cooling, frosting and storing water in underground soil by using solar refrigeration, comprising an evaporation section (1) of a solar refrigeration device, a gravity heat pipe (2), condensate (3) of the evaporation section of the gravity heat pipe (2), a condensation section (4) of the gravity heat pipe (2), a first connection joint (5), a first pump (6), a second pump (7), an underground condensation water production structure assembly (9), a deflector (10), a ventilation hole (11), a condensation pipe (13), a first ventilation and water pipe (14), a refrigeration main pipe (15), a ventilation hole (17) of the ventilation and water pipe, a second condensate output pipe (19), an access section (20) of the first ventilation and water pipe (14), a return air pipe (21), a check valve (22), condensate (23) of the evaporation section of the solar refrigeration device, an evaporation section (24) of the gravity heat pipe (2), a first condensate output pipe (25), a transition section (26) of the gravity heat pipe (2), a ventilation and water pipe pump (27), a second connection joint (28), and a second ventilation and water pipe (29); It is characterized in that: The condensation section (4) of the gravity heat pipe (2) is buried in the condensate (23) of the evaporation section (1) of the solar refrigeration device; the part above point a of the gravity heat pipe (2) is the condensation section (4) of the gravity heat pipe (2), the part between point a and point b of the gravity heat pipe (2) is the transition section (26), the part below point b of the gravity heat pipe (2) is the evaporation section (24) of the gravity heat pipe (2), the evaporation section (24) of the gravity heat pipe (2) is filled with condensate (3), the return air pipe (21) is arranged on the wall of the transition section (26), and the first condensate output pipe (25) is located at a position close to the bottom of the evaporation section (24) of the gravity heat pipe (2); The return air pipe (21) is connected with a second pump (7) and a check valve (22), wherein the check valve (22) and the second pump (7) are in a parallel relationship, and they are jointly connected to the return air pipe (21). The return air pipe (21) is connected to the condensation pipe (13) installed in the underground condensation water production structure assembly (9) through a second connection joint (28); The first condensate output pipe (25) and the second condensate output pipe (19) are connected together through a first pump (6), and the second condensate output pipe (19) is connected to the condensation pipe (13) installed in the underground condensation water production structure assembly (9) through a first connection joint (5); the first ventilation and water pipe (14) is connected to the access section (20) of the first ventilation and water pipe (14) through a first connection joint (5), the access section (20) of the first ventilation and water pipe (14) is connected to a ventilation and water pipe pump (27), the other end of the ventilation and water pipe pump (27) is an access pipe for the second ventilation and water pipe (29), and the other end of the first ventilation and water pipe (14) is a closed end at the position of the second connection joint (28); The underground condensation water production structure assembly (9) is composed of a first ventilation and water pipe (14) arranged in a refrigeration main pipe (15), a condensation pipe (13), and a deflector (10) installed at the lower part of the refrigeration main pipe (15); The pipe wall of the described main refrigeration pipe (15) is provided with ventilation holes (16), and water seepage holes (12) are provided at the position where the main refrigeration pipe (15) is connected to the flow guide plate (10); the pipe wall of the first ventilation and water pipe (14) is provided with ventilation holes (17) of the ventilation and water pipe; the flow guide plate (10) is provided with air permeable holes (11).

2. A device for cooling, frosting and storing water in underground soil by using solar refrigeration according to claim 1, characterized in that the second ventilation and water pipe (29) is spirally wound around the transition section (26) of the gravity heat pipe (2).

3. A device for cooling, frosting and storing water in underground soil by using solar refrigeration according to claim 1, characterized in that an opening (30) is provided at the top of the condensation section (4) of the gravity heat pipe (2), and the space of the condensation section (4) of the gravity heat pipe (2) is communicated with the space of the evaporation section (1) of the solar refrigeration device.

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