Building envelope structure ventilation and heat insulation system utilizing shallow geothermal energy

Abstract

The utility model discloses a building envelope ventilation and heat insulation system utilizing shallow geothermal energy, which belongs to the technical field of building energy conservation and renewable energy utilization and comprises a soil-air heat exchanger component, an interlayer ventilation wall component and a ventilation roof component. The soil-air heat exchanger assembly is buried in underground soil, and one end of an air inlet of the soil-air heat exchanger assembly is communicated with ground atmosphere; an air inlet in the lower end of the interlayer ventilation wall assembly communicates with one end of an air outlet of the soil-air heat exchanger assembly, an air outlet in the upper end of the interlayer ventilation wall assembly communicates with an air inlet of the ventilation roof assembly, and the ventilation roof assembly communicates with the outdoor atmosphere through an air outlet. Therefore, an air flowing channel for sequentially communicating the soil-air heat exchanger assembly, the interlayer ventilation wall assembly and the ventilation roof assembly is formed. Under the action of no external power, shallow geothermal energy can be spontaneously utilized for heat insulation and cooling of the building enclosure structure, heat entering a room through the enclosure structure is reduced, the indoor thermal environment is improved, and indoor air conditioner energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of building energy conservation and renewable energy utilization, and specifically relates to a building enclosure structure ventilation and heat insulation system utilizing shallow geothermal energy. Background Art

[0002] The energy consumption and carbon emissions of the construction industry account for a huge proportion of the total social energy consumption and carbon emissions, and there is a very significant potential for energy conservation and carbon reduction during the operation stage of buildings. Taking residential and office buildings as an example, during the operation of buildings, the energy consumption of HVAC systems accounts for more than 50% of the total energy consumption of buildings. Therefore, reducing the energy consumption of building HVAC systems is of great significance to achieving building energy conservation and promoting my country's "carbon peak and carbon neutrality".

[0003] In summer, due to the temperature difference between indoor and outdoor and the heat gain from solar radiation, a large amount of heat enters the room through the building envelope. In order to ensure the comfort of the indoor thermal environment of the building, a large amount of energy is often consumed by the air conditioning system to cool down and eliminate the impact of the heat gain from the building envelope on the indoor thermal environment. According to statistics, the cooling load formed by the heat gain from the building envelope accounts for 30% to 75% of the total air conditioning load, which highlights the urgency of improving the insulation and cooling capacity of the building envelope.

[0004] The soil-air heat exchanger system uses the characteristic that the underground soil has a constant temperature of approximately 18°C ​​throughout the year when the soil depth reaches 5 to 10 meters, and sends outdoor air into the underground pipes. In summer, the underground soil cools and lowers the temperature of the outdoor air flowing in the pipes. The system can effectively utilize the shallow geothermal heat of the soil to achieve "near zero energy consumption" pre-cooling of the air flowing in the soil buried pipes. For example, the Chinese utility model patent "A fresh air system based on underground wind" with application number 201920951262.4 and the Chinese utility model patent "A composite system of underground wind cooling and solar hot air heating" with application number 201921847026.4 combine the soil-air heat exchanger system with the building heating, ventilation, and air conditioning systems to achieve ventilation inside the building and cool the outdoor fresh air at the same time.

[0005] However, the existing soil-air heat exchanger system mainly focuses on combining with the indoor fresh air system. No good solution has been proposed for how to use the soil-air heat exchanger system to achieve heat insulation and cooling of the building envelope structure in summer. Utility Model Content

[0006] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the utility model provides a ventilation and heat insulation system for a building envelope structure utilizing shallow geothermal energy, which can spontaneously utilize shallow geothermal energy to insulate and cool the building envelope structure without external power, thereby reducing the heat entering the room through the envelope structure, improving the indoor thermal environment, and reducing indoor air-conditioning energy consumption.

[0007] To achieve the above-mentioned purpose, the utility model provides a building enclosure structure ventilation and heat insulation system utilizing shallow geothermal energy, comprising a soil-air heat exchanger assembly, a sandwich ventilation wall assembly, and a ventilation roof assembly;

[0008] The soil-air heat exchanger assembly is buried in the underground soil, one end of the air inlet is connected to the ground atmosphere, and one end of the air outlet is connected to the sandwich ventilation wall assembly;

[0009] The sandwich ventilation wall assembly is located on the side wall of the enclosure structure, and a wall ventilation cavity is provided in the sandwich ventilation wall assembly. The bottom of the wall ventilation cavity is communicated with the air outlet of the soil-air heat exchanger assembly, and the top is communicated with the ventilation roof assembly.

[0010] The ventilated roof assembly is located on the top of the enclosure structure, and a roof ventilation cavity is provided inside the ventilated roof assembly, and one end of the roof ventilation cavity is communicated with the top of the wall ventilation cavity, and the other end is communicated with the outdoor atmosphere;

[0011] An air flow channel which is connected in sequence is formed between the soil-air heat exchanger component, the sandwich ventilation wall component and the ventilation roof component.

[0012] As a further improvement of the present invention, corresponding inlet air valves are respectively provided at the air inlet openings of the soil-air heat exchanger assembly, the sandwich ventilation wall assembly and the ventilation roof assembly.

[0013] As a further improvement of the present invention, the soil-air heat exchanger assembly includes an air inlet duct, an air outlet duct and a heat exchange section duct arranged therebetween. One end of the heat exchange section duct is connected to the ground atmosphere through the air inlet duct, and the other end is connected to the sandwich ventilation wall assembly through the air outlet duct.

[0014] As a further improvement of the utility model,

[0015] The heat exchange section pipeline is a single underground buried pipe, or an underground buried pipe composed of multiple underground buried pipes connected in series or in parallel; and / or,

[0016] The heat exchange section pipeline is arranged as a whole in a transverse direction in a shallow soil layer of 3 to 10 meters.

[0017] As a further improvement of the utility model,

[0018] A first inlet air valve is provided at the air inlet port of the air inlet duct, which is an inlet air valve of the soil-air heat exchanger; and / or,

[0019] An air inlet hood is provided at one end of the air inlet duct extending to the ground atmosphere; and / or,

[0020] A filter is provided at the air inlet opening of the air inlet duct; and / or,

[0021] An air inlet rat-proof net is arranged at the air inlet opening of the air inlet duct.

[0022] As a further improvement of the utility model, the sandwich ventilation wall assembly includes a wall main body structure and a wall outer layer lightweight structure arranged outside the wall main body structure, and a wall ventilation cavity is formed between the two;

[0023] An air inlet opening of a sandwich ventilation wall is provided at the bottom of the wall ventilation cavity, and the air inlet opening is interconnected with the air outlet of the soil-air heat exchanger assembly;

[0024] A second inlet air valve is provided at the air inlet opening of the sandwich ventilation wall, which is the inlet air valve of the sandwich ventilation wall.

[0025] As a further improvement of the present invention, the sandwich ventilation wall assembly also includes a supporting keel, which is arranged between the outer lightweight structure of the wall and the main structure of the wall to support the outer lightweight structure of the wall.

[0026] As a further improvement of the utility model, the ventilated roof assembly includes a roof main structure and a glass cover plate arranged on the outside thereof, and a roof ventilation cavity is formed between the two;

[0027] One end of the roof ventilation cavity is provided with a ventilation roof air inlet opening which is interconnected with the top of the wall ventilation cavity; the other end is provided with a ventilation roof air outlet opening which is connected with the outdoor atmosphere;

[0028] A third inlet air valve is provided at the air inlet opening of the ventilation roof, which is the ventilation roof inlet air valve.

[0029] As a further improvement of the utility model,

[0030] The ventilation roof outlet opening is provided with an exhaust hood; and / or,

[0031] An exhaust outlet rat-proof net is provided at the air outlet opening of the ventilation roof.

[0032] As a further improvement of the present invention, the ventilated roof assembly has a certain slope with the horizontal plane, and the end with the lower slope is connected to the sandwich ventilated wall assembly.

[0033] In general, the above technical solution conceived by the utility model has the following beneficial effects compared with the prior art:

[0034] (1) The utility model of the building envelope ventilation and heat insulation system using shallow geothermal energy utilizes the thermal pressure driving force generated by the ventilated roof and side walls under the action of solar radiation to spontaneously form a natural airflow between the ventilated roof, the interlayer ventilated wall, and the soil-air heat exchanger without the action of external power. The outdoor hot air is continuously sucked into the soil-air heat exchanger, and the natural airflow is cooled by the underground soil. The cooled natural airflow is then used to take away the heat from the exterior walls and roof, reducing the amount of heat transmitted into the room through the envelope structure in summer. The shallow geothermal energy is effectively utilized to achieve the effect of thermal insulation and ventilation cooling of the building envelope, reduce the energy consumption of air conditioning in summer, and improve the indoor thermal environment in the transition season.

[0035] (2) The utility model of the building envelope structure ventilation and heat insulation system using shallow geothermal energy uses the opening and closing of the air valves at the air inlet openings of the ventilation roof assembly, the interlayer ventilation wall assembly, and the soil-air heat exchanger assembly to switch the operating mode under different seasonal environments. The operation is simple and the control is flexible, ensuring compatibility. By closing the air valves in the above-mentioned components, the system can be switched from the hot pressure ventilation and heat insulation mode suitable for summer or transitional seasons to the closed insulation mode suitable for winter, thereby meeting the needs of different application scenarios of the system.

[0036] (3) The utility model of the building envelope ventilation and heat insulation system using shallow geothermal energy has a simple structure and is easy to construct. It is not only suitable for new buildings, but also for energy-saving renovation of existing buildings in urban renewal. The system does not consume electricity during use. The thermal pressure driving force formed by solar radiation heat can spontaneously utilize the cold in the shallow soil for heat insulation and cooling of the building envelope. This technology is energy-saving and environmentally friendly, and has good application prospects and promotion value in the context of my country's "dual carbon" policy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of a ventilation and heat insulation system for a building enclosure structure utilizing shallow geothermal energy according to the utility model.

[0038] In all the drawings, the same reference numerals represent the same technical features, specifically: 1-soil-air heat exchanger assembly, 2-sandwich ventilation wall assembly, 3-ventilated roof assembly, 8-filter;

[0039] 11-air inlet duct, 12-air outlet duct; 21-lightweight structure of outer layer of wall, 22-supporting keel, 23-wall ventilation cavity, 24-main structure of wall; 31-main structure of roof, 32-roof ventilation cavity, 33-glass cover, 34-ventilated roof outlet opening; 41-first inlet air valve, 42-second inlet air valve, 43-third inlet air valve; 51-sandwich ventilation wall inlet opening, 52-ventilated roof inlet opening; 61-inlet hood, 62-exhaust hood; 71-inlet rat-proof net, 72-exhaust rat-proof net. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] See also Figure 1 The utility model provides a ventilation and heat insulation system for building envelope structures using shallow geothermal energy, including a soil-air heat exchanger assembly 1, a sandwich ventilation wall assembly 2, and a ventilation roof assembly 3. The soil-air heat exchanger assembly is buried in the underground soil, one end of which is an air inlet, connected to the ground atmosphere, and the other end is an air outlet, connected to the sandwich ventilation wall assembly; the sandwich ventilation wall assembly is located on the side wall of the enclosure structure, and the sandwich ventilation wall assembly has a wall ventilation cavity, and the bottom of the wall ventilation cavity is interconnected with the soil-air heat exchanger assembly, and the top is connected with the ventilation roof assembly; the ventilation roof assembly is located on the top of the enclosure structure, and the ventilation roof assembly has a roof ventilation cavity, and one end of the roof ventilation cavity is interconnected with the top of the wall ventilation cavity, and the other end is connected to the outdoor atmosphere.

[0046] The air outlet of the soil-air heat exchanger assembly 1 is connected to the air inlet at the lower end of the sandwich ventilation wall assembly 2, the air outlet at the upper end of the sandwich ventilation wall assembly 2 is connected to the air inlet of the ventilation roof assembly 3, and the ventilation roof assembly 3 is connected to the outdoor atmosphere through the exhaust port, thereby forming an air flow channel in which the soil-air heat exchanger assembly, the sandwich ventilation wall assembly and the ventilation roof assembly are connected in sequence.

[0047] In the thermal pressure ventilation and insulation mode in summer or transitional seasons, the air in the roof ventilation cavity absorbs solar radiation and its temperature rises, generating natural flowing air driven by thermal pressure. At this time, outdoor air is sucked into the soil-air heat exchanger assembly 1 through the air inlet. After the outdoor air is cooled in the underground pipe, it flows through the ventilation cavity in the sandwich ventilation wall assembly 2 and the ventilation cavity in the ventilation roof assembly 3 in turn. The cooled flowing air is used to cool the walls and roof, while blocking the heat transmitted into the room through the exterior walls and roof, thereby reducing the indoor air conditioning energy consumption in summer and improving the indoor thermal environment in the transitional season.

[0048] Specifically, the soil-air heat exchanger assembly 1 includes an air inlet duct 11, an air outlet duct 12, and a heat exchange section duct arranged therebetween. One end of the heat exchange section duct is connected to the ground atmosphere through the air inlet duct 11, and the other end is connected to the internal ventilation cavity of the sandwich ventilation wall assembly 2 through the air outlet duct 12.

[0049] In a preferred embodiment, the soil-air heat exchanger assembly 1 is buried in the underground soil using anti-corrosion pipes and components, wherein the heat exchange section pipe is arranged horizontally (preferably horizontally) in the shallow soil of 3 to 10 meters. The outer wall of the buried pipe of the soil-air heat exchanger assembly 1 is in full contact with the surrounding soil, and the air entering from the air inlet pipe 11 flows in the pipe and exchanges heat with the soil through the pipe wall. The air inlet pipe 11 and the air outlet pipe 12 are preferably vertical pipes, and both ends of the heat exchange section pipe are connected to the ground through vertical pipes perpendicular to them.

[0050] It should be noted that the heat exchange pipe of the soil-air heat exchanger assembly 1 can not only be Figure 1 In addition to the single underground buried pipe shown, multiple underground buried pipes can also be connected in series or in parallel to increase the flow path of air in the buried pipes to ensure the cooling effect.

[0051] Preferably, a first inlet air valve 41 is provided at the air inlet port of the air inlet duct 11, which is an inlet air valve of the soil-air heat exchanger, and the opening of the air valve can allow air to enter the interior of the soil-air heat exchanger assembly 1. Further preferably, in order to prevent rainwater from entering the interior of the duct through the air inlet duct 11, an air inlet hood 61 is provided at one end of the air inlet duct 11 extending to the ground atmosphere, and in order to filter the fresh air entering the air inlet duct 11, a filter 8 is provided at the air inlet port of the air inlet duct 11, preferably a primary filter. In some embodiments, a detachable air inlet rat-proof net 71 is also preferably provided at the air inlet port of the air inlet duct 11. To facilitate disassembly and replacement, the air inlet rat-proof net 71, the first inlet air valve 41 and the filter 8 are all arranged in the air inlet duct 11 above the ground.

[0052] Exemplarily, in a specific embodiment shown in the accompanying drawings, the air inlet rat-proof net 71, the first inlet air valve 41 and the filter 8 are arranged in sequence from top to bottom in the air inlet duct 11 located above the ground. However, it should be noted that the arrangement order of the air inlet rat-proof net 71, the first inlet air valve 41 and the filter 8 of the utility model is not limited and can be adjusted according to actual conditions.

[0053] Furthermore, the sandwich ventilation wall assembly 2 includes a wall main structure 24 and a wall outer layer lightweight structure 21 arranged outside the wall main structure 24, and a wall ventilation cavity 23 is formed between the wall outer layer lightweight structure 21 and the wall main structure 24. The sandwich ventilation wall assembly 2 also includes a supporting keel 22, which is arranged between the wall outer layer lightweight structure 21 and the wall main structure 24 and is used to support the wall outer layer lightweight structure 21. A sandwich ventilation wall air inlet opening 51 is provided at the bottom of the wall ventilation cavity 23, and the air inlet opening is interconnected with the air outlet duct 12 of the soil-air heat exchanger assembly 1.

[0054] Preferably, a second inlet air valve 42 is provided at the interlayer ventilation wall air inlet opening 51, which is the interlayer ventilation wall inlet air valve. When it is opened, the air cooled by the soil-air heat exchanger assembly 1 can enter the wall ventilation cavity 23 of the interlayer ventilation wall assembly 2.

[0055] Further preferably, the main wall structure 24 is an aerated concrete block, and the outer lightweight structure 21 of the sandwich ventilated wall assembly includes but is not limited to prefabricated modules made of existing materials such as metal plates, stones, engineering plastics, composite materials, etc., which can be installed on site by supporting the keel frame.

[0056] Furthermore, the ventilated roof assembly 3 includes a main roof structure 31 and a glass cover plate 33 arranged outside the main roof structure 31, and the main roof structure 31 is preferably a reinforced concrete structure; a roof ventilation cavity 32 is formed between the main roof structure 31 and the glass cover plate 33. A ventilated roof air inlet opening 52 is provided at one end of the roof ventilation cavity 32, which is interconnected with the top of the wall ventilation cavity 23 of the sandwich ventilation wall assembly 2; and a ventilated roof air outlet opening 34 is provided at the other end, which is connected with the outdoor atmosphere.

[0057] Preferably, a third inlet air valve 43 is provided at the ventilated roof air inlet opening 52, which is the ventilated roof inlet air valve. When it is opened, the air in the wall ventilation cavity 23 of the sandwich ventilated wall assembly 2 can enter the roof ventilation cavity 32 of the ventilated roof assembly 3.

[0058] Preferably, the ventilated roof assembly 3 has a certain slope with the horizontal plane, and the slope is further preferably 15° to 40°, and the end with the lower slope is preferably connected to the sandwich ventilated wall assembly 2, which is beneficial to the flow of air in the roof ventilation cavity 32 under the action of thermal pressure when the roof is heated by solar radiation.

[0059] To prevent rainwater from entering the roof ventilation cavity 32 through the air outlet opening, an exhaust hood 62 is preferably provided at the ventilation roof air outlet opening 34. In some embodiments, an exhaust rodent-proof net 72 is also provided at the ventilation roof air outlet opening 34.

[0060] The building envelope structure ventilation and heat insulation system using shallow geothermal energy of the utility model includes a heat pressure ventilation and heat insulation mode in summer or transitional seasons and a closed heat preservation mode in winter, which can adapt to the needs of different seasons. By opening and closing the first inlet air valve 41, the second inlet air valve 42 and the third inlet air valve 43 set at the air inlet opening of the soil-air heat exchanger component 1, the interlayer ventilation wall component 2 and the ventilation roof component 3, the switching of the operating mode in different seasonal environments can be achieved. The process is as follows:

[0061] In the heat pressure ventilation insulation mode in summer or transitional seasons, the first inlet air valve 41, the second inlet air valve 42 and the third inlet air valve 43 are opened to form interconnected air flow channels between the soil-air heat exchanger assembly 1, the interlayer ventilation wall assembly 2 and the ventilation roof assembly 3. In summer or transitional seasons, the temperature of the roof main structure 31 and the wall main structure 24 rises due to absorbing solar radiation, and they transfer heat to the air in the roof ventilation cavity 32 and the wall ventilation cavity 23. The air is heated up, and thermal pressure is generated in the roof ventilation cavity 32 and the wall ventilation cavity 23 to drive the natural air flow upward. Under the action of the thermal pressure, outdoor air is sucked into the soil-air heat exchanger assembly 1 from the air inlet hood 61. After the outdoor air is cooled in the underground buried pipe, it flows through the ventilation cavity 23 of the sandwich ventilation wall assembly 2 and the ventilation cavity 32 of the ventilation roof assembly 3 in turn. The cooled flowing air is used to cool the walls and roof, absorb and block the heat transmitted into the room through the exterior walls and the roof, and the naturally flowing air after absorbing heat is discharged to the outdoors through the ventilation roof outlet opening 34 at the top of the roof.

[0062] In the closed heat preservation mode in winter, the first inlet air valve 41, the second inlet air valve 42 and the third inlet air valve 43 are closed. Since the air valves are closed, airtight cavities with no air circulation are formed inside the sandwich ventilated wall assembly 2 and the ventilated roof assembly 3, which can effectively improve the heat preservation capacity of the enclosure structure and reduce the loss of indoor heat in winter.

[0063] The utility model discloses a ventilation and heat-insulating system for a building envelope structure utilizing shallow geothermal energy. By integrating a soil-air heat exchanger component, a sandwich ventilation wall component, and a ventilation roof component in the building envelope structure, and combining corresponding arrangements of a pipeline component, an air valve, and an air inlet opening, an air flow channel interconnected with each other is formed between the soil-air heat exchanger, the wall, and the roof.

[0064] By utilizing the thermal pressure driving force generated by the ventilated roof and side walls under the action of solar radiation, a natural airflow is spontaneously formed between the ventilated roof, the interlayer ventilated wall, and the soil-air heat exchanger without external power. The outdoor hot air is continuously sucked into the soil-air heat exchanger, and the natural airflow is cooled by the underground soil. The cooled natural airflow is then used to take away the heat from the exterior walls and roof, reducing the heat transmitted into the room through the enclosure structure in summer. Effectively utilizing shallow geothermal heat to achieve the effects of thermal insulation and ventilation cooling of the building enclosure structure, reduce air conditioning energy consumption in summer, and improve the indoor thermal environment during the transition season.

[0065] And by opening and closing the air valve, the system can switch between the hot pressure ventilation insulation mode in summer or transitional seasons and the closed insulation mode in winter, so as to adapt to the needs of different seasons.

[0066] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A building envelope ventilation and heat insulation system utilizing shallow geothermal energy, characterized in that: It includes a soil-air heat exchanger assembly, a sandwich ventilated wall assembly, and a ventilated roof assembly; The soil-air heat exchanger assembly is buried in the underground soil, one end of the air inlet is connected to the ground atmosphere, and one end of the air outlet is connected to the sandwich ventilation wall assembly; The sandwich ventilation wall assembly is located on the side wall of the enclosure structure, and a wall ventilation cavity is provided in the sandwich ventilation wall assembly. The bottom of the wall ventilation cavity is communicated with the air outlet of the soil-air heat exchanger assembly, and the top is communicated with the ventilation roof assembly. The ventilated roof assembly is located on the top of the enclosure structure, and a roof ventilation cavity is provided inside the ventilated roof assembly, and one end of the roof ventilation cavity is communicated with the top of the wall ventilation cavity, and the other end is communicated with the outdoor atmosphere; An air flow channel which is connected in sequence is formed between the soil-air heat exchanger component, the sandwich ventilation wall component and the ventilation roof component.

2. The building envelope ventilation and heat insulation system utilizing shallow geothermal energy according to claim 1 is characterized in that: Corresponding inlet air valves are respectively provided at the air inlet openings of the soil-air heat exchanger assembly, the sandwich ventilation wall assembly and the ventilation roof assembly.

3. The building envelope ventilation and heat insulation system utilizing shallow geothermal energy according to claim 1, characterized in that: The soil-air heat exchanger assembly includes an air inlet duct, an air outlet duct and a heat exchange section duct arranged therebetween. One end of the heat exchange section duct is connected to the ground atmosphere through the air inlet duct, and the other end is connected to the sandwich ventilation wall assembly through the air outlet duct.

4. The building envelope ventilation and heat insulation system using shallow geothermal energy according to claim 3 is characterized in that: The heat exchange section pipeline is a single underground buried pipe, or an underground buried pipe composed of multiple underground buried pipes connected in series or in parallel; and / or, The heat exchange section pipeline is arranged as a whole in a transverse direction in a shallow soil layer of 3 to 10 meters.

5. The building envelope ventilation and heat insulation system using shallow geothermal energy according to claim 3 is characterized in that: A first inlet air valve is provided at the air inlet port of the air inlet duct, which is an inlet air valve of the soil-air heat exchanger; and / or, An air inlet hood is provided at one end of the air inlet duct extending to the ground atmosphere; and / or, A filter is provided at the air inlet opening of the air inlet duct; and / or, An air inlet rat-proof net is arranged at the air inlet opening of the air inlet duct.

6. The building envelope ventilation and heat insulation system using shallow geothermal energy according to any one of claims 1 to 5, characterized in that: The sandwich ventilation wall assembly comprises a wall main body structure and a wall outer layer lightweight structure arranged outside the wall main body structure, and a wall ventilation cavity is formed between the two; An air inlet opening of a sandwich ventilation wall is provided at the bottom of the wall ventilation cavity, and the air inlet opening is interconnected with the air outlet of the soil-air heat exchanger assembly; A second inlet air valve is provided at the air inlet opening of the sandwich ventilation wall, which is the inlet air valve of the sandwich ventilation wall.

7. The building envelope ventilation and heat insulation system using shallow geothermal energy according to claim 6 is characterized in that: The sandwich ventilation wall assembly also includes a supporting keel, which is arranged between the outer lightweight structure of the wall and the main structure of the wall to support the outer lightweight structure of the wall.

8. The building envelope ventilation and heat insulation system using shallow geothermal energy according to any one of claims 1 to 5 or 7, characterized in that: The ventilated roof assembly comprises a main roof structure and a glass cover plate arranged on the outside thereof, and a roof ventilation cavity is formed between the two; One end of the roof ventilation cavity is provided with a ventilation roof air inlet opening which is interconnected with the top of the wall ventilation cavity; the other end is provided with a ventilation roof air outlet opening which is connected with the outdoor atmosphere; A third inlet air valve is provided at the air inlet opening of the ventilation roof, which is the ventilation roof inlet air valve.

9. The building envelope ventilation and heat insulation system using shallow geothermal energy according to claim 8, characterized in that: The ventilation roof outlet opening is provided with an exhaust hood; and / or, An exhaust outlet rat-proof net is provided at the air outlet opening of the ventilation roof.

10. The building envelope ventilation and heat insulation system using shallow geothermal energy according to any one of claims 1-5, 7 and 9, characterized in that: The ventilated roof assembly has a certain slope with the horizontal plane, and the end with the lower slope is connected to the sandwich ventilated wall assembly.

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