Underground concealed karst cold air resource searching method and sustainable development and utilization system

Abstract

The invention discloses an underground concealed karst cold air resource searching method and a sustainable development and utilization system. The system comprises an air entraining pipe connected with the interior of an underground concealed karst cave, an air extraction system is arranged on the air entraining pipe, the end of the air entraining pipe is connected with a plurality of dehumidifiers, and the dehumidifiers are communicated in series through connecting pipes; each connecting pipe is sequentially provided with an external exhaust humidity sensor and a three-way valve in the gas flowing direction, the other ends of all the three-way valves are connected in parallel through a home-entry pipe, and the end of the home-entry pipe is connected to an indoor cold air opening. The method is simple and easy to implement; according to the system, sustainable development and utilization of underground concealed karst cold air resources can be achieved, and the underground concealed karst cold air resources can be used for cold air of human residences; in addition, the system is simple, low in cost, reasonable in design, high in practicability and capable of being widely applied and popularized.

Description

Technical Field

[0001] The present invention relates to a karst cold air searching method and a utilizing system, in particular to a sustainable development and utilization system of underground hidden karst cold air resources. Background Art

[0002] At present, due to the maturity of heat pump technology, there are many cases of underground heat source utilization, but there are few cases of underground cold source utilization, especially there is almost no precedent for the intelligent and sustainable utilization of karst cold air.

[0003] Karst is widely distributed in my country. Affected by geological structure and groundwater fissures, underground cave fissures that store cold air in karst distribution areas continue to develop, making my country rich in underground cold air resources in karst areas. However, due to technical limitations, the utilization rate of underground cold air resources in my country's karst areas is extremely low.

[0004] In the article "A Review of Research on Natural Cooling Source Technologies," Zhao Xiao et al. introduced the utilization of natural cooling sources and analyzed the current research status of natural cooling sources from two perspectives: natural cooling source storage technology and natural cooling source cooling technology. Specifically, they noted that current natural cooling source storage and utilization technologies primarily include wind cooling technology, water cooling technology, and ice cooling technology. The article discusses the research and application status of each of these three cooling storage technologies, as well as their applicable scenarios and conditions. Natural cooling sources for natural cooling source cooling applications can be stored using cooling storage technology to provide cooling across time periods, or they can be directly utilized for cooling. Key application methods include direct utilization, heat pipe technology, indirect heat exchange, evaporative cooling, and cooling tower technology.

[0005] However, while the document indicates that natural cooling sources can be used directly for cooling, in practice, their direct cooling applications are severely limited, particularly when used to cool human residences. For example, the karst cooling air referred to in this application, while a natural cooling source, is subject to high humidity and highly variable temperature, humidity, and internal wind speeds due to the influence of the groundwater environment. Therefore, it is difficult to directly use this karst cooling air as a cooling source for human residences.

[0006] At the same time, the natural cooling sources currently used are mainly surface caves, but there is no targeted exploration method for the hidden karst cold air, so targeted exploration cannot be carried out.

[0007] To this end, the applicant has studied a method for finding and a system for developing and utilizing natural cold sources, and has developed a system for finding and sustainably developing karst cold air resources, in order to solve the current technical problems existing in the development and utilization of karst cold air resources and provide effective technical support for the rational use of karst cold air resources. Summary of the Invention

[0008] To address the aforementioned technical issues, the present invention provides a method for identifying hidden underground karst cooling resources and a system for their sustainable development and utilization. The method is simple and easy to implement; the system enables the sustainable development and utilization of karst cooling resources, including their use as cooling systems in human residences. Furthermore, the system is simple, low-cost, rationally designed, and highly practical, making it suitable for widespread application.

[0009] One of the technical solutions of the present invention:

[0010] A method for finding underground hidden karst cold air resources is provided, comprising the following steps:

[0011] (1) Determine the karst distribution area based on geological data maps and identify areas where karst cooling air may exist;

[0012] (2) Conduct ground surveys in areas where karst cold air may exist. By dropping dilute hydrochloric acid on the rock, if the rock bubbles violently, it is considered to be soluble rock and the area is a stratum area with karst cold air resources;

[0013] (3) Observe the topographic and geomorphic conditions in the stratum area with karst cooling resources. If the terrain has large elevation differences, mountain peaks, steep slopes, exposed surface rocks, visible stone teeth, karst grooves and / or karst troughs, then the area is a topographic and geomorphic area with karst cooling resources;

[0014] (4) Further, in the topographic and geomorphological areas with karst cooling resources, investigate the surrounding mountains to see whether there are springs, underground river entrances and exits, rivers, karst pools, sinkholes, disappearance of surface streams, and / or karst hydrological characteristics in the cave zone; if 3-4 of these karst hydrological characteristics exist, it can be determined that the area has the hydrogeological conditions for the storage of karst cooling resources;

[0015] (5) Further, in areas with hydrogeological conditions for the storage of karst cold air resources, observe the structural development signs of the surrounding mountains to see whether there are visible faults in the mountains, large vertical and flat rock walls, a large number of small cracks on the rock surface, rock fragmentation and / or rock surface groove filling; if there are 2-3 structural development signs, it can be determined that the area has the geological structural conditions for the storage of karst cold air resources;

[0016] (6) When the above conditions (1)-(5) are all met, geophysical methods are used to determine the areas where hidden underground caves may exist, and then drilling is carried out in the possible areas. When the drilling encounters caves, karst cooling air is found.

[0017] The second technical solution of the present invention:

[0018] Provided is a sustainable development and utilization system for underground hidden karst cold air resources, comprising an air duct connected to the interior of an underground cave, an air extraction system provided on the air duct, a plurality of dehumidifiers connected to the end of the air duct, and the plurality of dehumidifiers connected in series via connecting pipes;

[0019] Each of the connecting pipes is provided with an external exhaust humidity sensor and a three-way valve in sequence along the gas flow direction. The other ends of all the three-way valves are connected in parallel through the house inlet pipe, and the end of the house inlet pipe is connected to the indoor air conditioning outlet.

[0020] By installing multiple dehumidifiers and designing their arrangement and connection, this solution effectively dehumidifies karst cold air, meeting the requirements of human habitation. It also minimizes the dwelling time of karst cold air within the dehumidifiers, reducing cold air loss. Furthermore, the system of this invention boasts a simple design, low cost, and high practicality, making it suitable for widespread application in karst areas.

[0021] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, the three-way valve is an electrically controlled three-way valve, and the external exhaust humidity sensor and the three-way valve are both connected to a controller.

[0022] This solution sets an electrically controlled three-way valve and connects it to the controller together with the external exhaust humidity sensor, which can realize automatic adjustment of the dehumidification function, making it more intelligent and convenient to use.

[0023] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, a cave temperature sensor is provided inside the underground cave, and the cave temperature sensor is connected to the controller.

[0024] This solution can monitor the temperature inside the cave by setting up a cave temperature sensor in the cave and connecting it to the controller, ensuring that the temperature environment inside the karst is within the effective range, avoiding excessive use, and making the design more reasonable and more practical.

[0025] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, a humidity sensor is provided inside the underground cave, and the humidity sensor is connected to the controller.

[0026] This solution can monitor the humidity in the cave by setting up a humidity sensor in the cave and connecting it to the controller, ensuring that the system can stop running when the humidity exceeds the maximum dehumidification capacity. This design is more reasonable and more practical.

[0027] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, a wind speed sensor is provided inside the underground cave, and the wind speed sensor is connected to the controller.

[0028] This solution can monitor the wind speed in the tunnel by installing a wind speed sensor in the tunnel and connecting it to the controller. The working power of the exhaust fan can be adjusted according to the change of wind speed. This design is more energy-saving and more practical.

[0029] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, the air extraction system is connected to the controller.

[0030] This solution connects the exhaust system to the controller so that the controller can adjust the operating power of the exhaust system according to changes in conditions such as temperature or humidity. The design is more reasonable, energy-saving and practical.

[0031] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, there are 2-10 dehumidifiers in total.

[0032] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, a filter is provided on the air duct.

[0033] This solution can filter out large particles that may be present in the underground cold air by installing a filter on the air duct, preventing large particles from clogging the system, and is a more reasonable design.

[0034] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, a check valve is provided on the rear side of the connection node on the house inlet pipe, and the opening direction of the check valve is the direction of the cold air entering the house.

[0035] This solution prevents the dehumidified cold air from flowing back into the dehumidifier by installing a check valve on the rear side of the connection node on the inlet pipe, thereby reducing the loss of cold air. The design is more reasonable and more practical.

[0036] Preferably, in the aforementioned system for sustainable development and utilization of underground hidden karst cold air resources, the air duct, connecting pipe and house inlet pipe are all insulated pipes.

[0037] This solution can further reduce the loss of cold air by setting the house entrance pipe as an insulation pipe, making the design more reasonable and more practical.

[0038] Beneficial effects of the present invention:

[0039] 1. The method for searching for underground hidden karst cold air resources of the present invention is simple and easy to implement.

[0040] 2. By installing multiple dehumidifiers and designing their arrangement and connection, the system of the present invention effectively dehumidifies karst cold air, meeting the requirements of human habitation. It also minimizes the dwelling time of karst cold air within the dehumidifiers, reducing cold air loss. Furthermore, the system of the present invention features a simple design, low cost, and high practicality, making it suitable for widespread application in karst areas.

[0041] 3. The system of the present invention is equipped with an electrically controlled three-way valve and connected to the controller together with the external exhaust humidity sensor, so as to realize automatic adjustment of the dehumidification function, which is more intelligent and convenient to use.

[0042] 4. The system of the present invention can monitor the temperature in the cave by setting a cave temperature sensor in the cave and connecting it to the controller, ensuring that the temperature environment inside the karst is within the effective range, avoiding excessive use, and having a more reasonable design and stronger practicality.

[0043] 5. The system of the present invention can monitor the humidity in the cave by setting a humidity sensor in the cave and connecting it to the controller, ensuring that the system can stop running when the humidity exceeds the maximum dehumidification capacity. This design is more reasonable and more practical.

[0044] 6. The system of the present invention is able to monitor the wind speed in the cave by setting a wind speed sensor in the cave and connecting it to the controller. The working power of the exhaust fan can be adjusted according to the change of wind speed. This design is more energy-saving and more practical.

[0045] 7. The system of the present invention connects the exhaust system to the controller so that the controller can adjust the operating power of the exhaust system according to changes in conditions such as temperature or humidity. The design is more reasonable, more energy-saving and more practical.

[0046] 8. The system of this solution can filter out large particles that may exist in the underground cold air by installing a filter on the air duct, avoiding blockage of the system by large particles, and the design is more reasonable.

[0047] 9. The system of the present invention can prevent the dehumidified cold air from flowing back into the dehumidifier by setting a check valve on the rear side of the connection node on the house inlet pipe, thereby reducing the loss of cold air, making the design more reasonable and more practical.

[0048] 10. The system of the present invention can further reduce the loss of cold air by setting the house entrance pipe as an insulation pipe, and the design is more reasonable and more practical.

[0049] In summary, the method of the present invention is simple and easy to implement; the system of the present invention can realize the sustainable development and utilization of karst cooling air resources, and can use karst cooling air resources for cooling human residences; in addition, the system of the present invention is simple, low in cost, reasonably designed, highly practical, and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Attachment Figure 1 Schematic diagram of the structure of the system of the present invention.

[0051] Explanation of the accompanying reference numerals: 1-air duct, 2-exhaust system, 3-dehumidifier, 4-connecting pipe, 5-external exhaust humidity sensor, 6-three-way valve, 7-house inlet pipe, 8-air conditioning outlet, 9-controller, 10-temperature sensor in the cave, 11-humidity sensor in the cave, 12-wind speed sensor in the cave, 13-filter, 14-check valve. DETAILED DESCRIPTION

[0052] The present invention will be further described below with reference to the examples, but they are not intended to limit the present invention.

[0053] Embodiments of the Invention

[0054] Example 1

[0055] A method for finding underground hidden karst cold air resources, comprising the following steps:

[0056] (1) Determine the karst distribution area based on geological data maps and identify areas where karst cooling air may exist;

[0057] (2) Conduct ground surveys in areas where karst cold air may exist. By dropping dilute hydrochloric acid on the rock, if the rock bubbles violently, it is considered to be soluble rock and the area is a stratum area with karst cold air resources;

[0058] (3) Observe the topographic and geomorphic conditions in the stratum area with karst cooling resources. If the terrain has large elevation differences, mountain peaks, steep slopes, exposed surface rocks, visible stone teeth, karst grooves and / or karst troughs, then the area is a topographic and geomorphic area with karst cooling resources;

[0059] (4) Further, in the topographic and geomorphological areas with karst cooling resources, investigate the surrounding mountains to see whether there are springs, underground river entrances and exits, rivers, karst pools, sinkholes, disappearance of surface streams, and / or karst hydrological characteristics in the cave zone; if 3-4 of these karst hydrological characteristics exist, it can be determined that the area has the hydrogeological conditions for the storage of karst cooling resources;

[0060] (5) Further, in areas with hydrogeological conditions for the storage of karst cold air resources, observe the structural development signs of the surrounding mountains to see whether there are visible faults in the mountains, large vertical and flat rock walls, a large number of small cracks on the rock surface, rock fragmentation and / or rock surface groove filling; if there are 2-3 structural development signs, it can be determined that the area has the geological structural conditions for the storage of karst cold air resources;

[0061] (6) When the above conditions (1)-(5) are all met, geophysical methods are used to determine the areas where hidden underground caves may exist, and then drilling is carried out in the possible areas. When the drilling encounters caves, karst cooling air is found.

[0062] Example 2

[0063] A sustainable development and utilization system for underground hidden karst cold air resources, as shown in the attached Figure 1 As shown, it includes an air duct 1 connected to the interior of the underground cave, an air extraction system 2 is provided on the air duct 1, and multiple dehumidifiers 3 are connected to the end of the air duct 1. The multiple dehumidifiers 3 are connected in series via a connecting pipe 4;

[0064] Each of the connecting pipes 4 is provided with an external exhaust humidity sensor 5 and a three-way valve 6 in sequence along the direction of gas flow. The other ends of all the three-way valves 6 are connected in parallel through the house inlet pipe 7, and the end of the house inlet pipe 7 is connected to the indoor air conditioning outlet 8.

[0065] The air extraction system 2 in this embodiment can specifically be an air extractor, the purpose of which is to extract the karst cold air. When using the system in this embodiment, first, based on preliminary work such as exploration and drilling, the air duct 1 is then inserted through the drilled hole into the karst underground cave. The cave entrance is sealed, and the air duct 1 is laid until it connects to the dehumidifier 3. Then, the inlet pipe 7 is connected to the dehumidifier 3 and the indoor cold air vent 8 respectively. During operation, the exhaust system 2 is started, and the underground cold air is extracted through the air duct 1 and then sent into the dehumidifier 3. When the underground cold air reaches the dehumidifier 3, it first enters the first dehumidifier 3 and then is discharged from the outlet of the first dehumidifier 3. While being discharged, the first external exhaust humidity sensor 5 obtains the humidity of the cold air. When the humidity value reaches the use requirement, the conduction direction of the first three-way valve 6 is adjusted to be connected to the house inlet pipe 7 and directly sent into the room; when the humidity value there is greater than the maximum humidity value required for use, the conduction direction of the first three-way valve 6 is adjusted to be connected to the second dehumidifier 3, and dehumidification is continued in the second dehumidifier 3. And so on. When the cold air is discharged from each dehumidifier 3, the humidity will be monitored, and only when the humidity value is within the use requirement range will it flow into the house inlet pipe 7 to ensure the dehumidification effect while avoiding excessive dehumidification.

[0066] Further implementation examples are attached Figure 1As shown, the three-way valve 6 is an electrically controlled three-way valve, and the external exhaust humidity sensor 5 and the three-way valve 6 are both connected to the controller 9 .

[0067] When this embodiment is in use, the humidity value sensed by the external exhaust humidity sensor 5 is directly transmitted to the controller 9, and the controller 9 is used to determine the conduction direction of the three-way valve 6, wherein the principle of the conduction direction of the three-way valve 6 is the same as the above principle.

[0068] Further implementation examples are attached Figure 1 As shown, a cave temperature sensor 10 is provided inside the underground cave, and the cave temperature sensor 10 is connected to the controller 9.

[0069] When this embodiment is working, the temperature data obtained by the temperature sensor 10 in the cave is transmitted to the controller 9. After obtaining the temperature data, the controller 9 can control the operation of the exhaust system 2 by actively controlling the start and stop of the exhaust system 2 or manually controlling the start and stop of the exhaust system 2 by issuing an alarm. When the cold air temperature in the cave is too high or too low, the exhaust system 2 stops exhausting. The exhaust system 2 will only work when the temperature in the cave is within a predetermined temperature range.

[0070] Further implementation examples are attached Figure 1 As shown, a humidity sensor 11 is provided inside the underground cave, and the humidity sensor 11 is connected to the controller 9 .

[0071] When this embodiment is working, the humidity data obtained by the humidity sensor 11 in the cave is transmitted to the controller 9. After obtaining the humidity data, the controller 9 can control the operation of the exhaust system 2 by actively controlling the start and stop of the exhaust system 2 or manually controlling the start and stop of the exhaust system 2 by issuing an alarm. When the humidity of the cold air in the cave is too high or too low, the exhaust system 2 stops exhausting. The exhaust system 2 will only work when the humidity in the cave is within the predetermined humidity range.

[0072] Further implementation examples are attached Figure 1 As shown, an in-cave wind speed sensor 12 is provided inside the underground cave, and the in-cave wind speed sensor 12 is connected to the controller 9 .

[0073] When this embodiment is working, the wind speed data obtained by the wind speed sensor 12 in the cave is transmitted to the controller 9. After obtaining the wind speed data, the controller 9 can adjust the working power of the exhaust system 2 by active or manual adjustment by issuing an alarm to achieve the purpose of energy saving.

[0074] Further implementation examples are attached Figure 1 As shown, the air extraction system 2 is connected to the controller 9.

[0075] When this embodiment is working, the controller 9 controls the start and stop of the air extraction system 2 and the working power.

[0076] Further implementation examples are attached Figure 1 As shown, there are 2 to 10 dehumidifiers 3. In specific implementation, the number of dehumidifiers 3 is set according to the dehumidification capacity, and the total dehumidification capacity of all dehumidifiers 3 is greater than the dehumidification range required by the maximum humidity of conventional underground air conditioning.

[0077] Further implementation examples are attached Figure 1 As shown, a filter 13 is provided on the air duct 1. The filter 13 is a conventional filter, which is capable of filtering out large particles that may exist in the underground cold air.

[0078] Further implementation examples are attached Figure 1 As shown, a check valve 14 is provided at the rear side of the connection node on the inlet pipe 7, and the opening direction of the check valve 14 is the flow direction of the cold air into the house.

[0079] The arrangement position of the check valve 14 in this embodiment is as follows: Figure 1 As shown, between the connection node of the house inlet pipe 14 and the three-way valve 6, when the cold air flows into the house inlet pipe 14 from the position of a certain three-way valve 6, the cold air can only flow along the house inlet pipe 14 and enter the cold air outlet 8, and will not flow back into the dehumidifier 3.

[0080] Further implementation examples are attached Figure 1 As shown, the air duct 1, the connecting pipe 4 and the house inlet pipe 7 are all made of thermal insulation pipes.

[0081] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A method for finding underground hidden karst cold air resources, characterized in that: The steps include: (1) Determine the karst distribution area based on geological data maps and identify areas where karst cooling air may exist; (2) Conduct ground surveys in areas where karst cold air may exist. By dropping dilute hydrochloric acid on the rock, if the rock bubbles violently, it is considered to be soluble rock and the area is a stratum area with karst cold air resources; (3) Observe the topographic and geomorphic conditions in the stratum area with karst cooling resources. If the terrain has large elevation differences, mountain peaks, steep slopes, exposed surface rocks, visible stone teeth, karst grooves and / or karst troughs, then the area is a topographic and geomorphic area with karst cooling resources; (4) Further, in the topographic and geomorphological areas with karst cooling resources, investigate the surrounding mountains to see whether there are springs, underground river entrances and exits, rivers, karst pools, sinkholes, disappearance of surface streams, and / or karst hydrological characteristics in the cave zone; if 3-4 of these karst hydrological characteristics exist, it can be determined that the area has the hydrogeological conditions for the storage of karst cooling resources; (5) Further, in areas with hydrogeological conditions for the storage of karst cold air resources, observe the structural development signs of the surrounding mountains to see whether there are visible faults in the mountains, large vertical and flat rock walls, a large number of small cracks on the rock surface, rock fragmentation and / or rock surface groove filling; if there are 2-3 structural development signs, it can be determined that the area has the geological structural conditions for the storage of karst cold air resources; (6) When the above conditions (1)-(5) are all met, geophysical methods are used to determine the areas where hidden underground caves may exist, and then drilling is carried out in the possible areas. When the drilling encounters caves, karst cooling air is found.

2. A system for sustainable development and utilization of underground hidden karst cold air resources, characterized by: The invention comprises an air duct (1) connected to the interior of an underground cave, an air extraction system (2) being provided on the air duct (1), a plurality of dehumidifiers (3) being connected to the end of the air duct (1), and the plurality of dehumidifiers (3) being connected in series via a connecting pipe (4); Each of the connecting pipes (4) is provided with an external exhaust humidity sensor (5) and a three-way valve (6) in sequence along the gas flow direction. The other ends of all the three-way valves (6) are connected in parallel via an inlet pipe (7), and the end of the inlet pipe (7) is connected to an indoor cold air outlet (8).

3. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: The three-way valve (6) is an electrically controlled three-way valve, and the external exhaust humidity sensor (5) and the three-way valve (6) are both connected to a controller (9).

4. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: An in-cave temperature sensor (10) is provided inside the underground cave, and the in-cave temperature sensor (10) is connected to the controller (9).

5. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: An in-hole humidity sensor (11) is provided inside the underground cave, and the in-hole humidity sensor (11) is connected to the controller (9).

6. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: An in-cave wind speed sensor (12) is provided inside the underground cave, and the in-cave wind speed sensor (12) is connected to the controller (9).

7. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: The air extraction system (2) is connected to a controller (9).

8. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: There are 2 to 10 dehumidifiers (3) in total.

9. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: The air duct (1) is provided with a filter (13).

10. The sustainable development and utilization system for underground hidden karst cold air resources according to claim 2 is characterized by: A check valve (14) is provided on the rear side of the connection node of the inlet pipe (7), and the opening direction of the check valve (14) is the flow direction of the cold air into the house.

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