A vertical geothermal ventilation and phase change energy storage floor fresh air coupling system

Abstract

The utility model discloses a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system belongs to phase change material heat storage and building ventilation technical field, including house body and fresh air preheating system, and fresh air preheating system one end draws outside air, and the other end passes through house body and is connected with one end of fresh air channel, and the one end of fresh air channel close to fresh air preheating system is set up in the bottom side inside house body, and the other end is set up in the upper side of the wall body of house body interior away from fresh air preheating system, and the bottom side inside house body still is provided with internal interlayer, and the inside top of internal interlayer is provided with phase change energy storage module, and the upper side of phase change energy storage module and internal interlayer are provided with capillary hot water pipe network, and one end of exhaust system is located in the upper surface of internal interlayer, and the other end passes through internal interlayer, fresh air channel and house body and is located in the outside of house body, and the utility model discloses realized vertical sleeve geothermal ventilation and building thermal environment's energy -conserving control.

Description

Technical Field

[0001] This utility model relates to the field of phase change material heat storage and building ventilation technology, and in particular to a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system. Background Technology

[0002] Currently, the integration of phase change energy storage structures with buildings has become an important technological approach to reducing building energy consumption. The application of phase change materials in building energy conservation mainly manifests in two aspects: passive energy conservation, which fully utilizes natural heat and cold sources such as solar and geothermal energy; and active energy conservation, which uses active heat and cold sources for energy storage, achieving efficient energy utilization through peak shaving and valley filling. In recent years, many researchers have proposed integrated solutions combining phase change energy storage with underfloor heating systems. This system can significantly reduce building operating energy consumption while ensuring indoor thermal comfort. However, existing energy storage underfloor heating systems still suffer from problems such as long charging and discharging times, high construction costs, and a lack of fresh air systems, limiting their widespread application in practical engineering projects.

[0003] Existing research includes numerous patent applications for phase change energy storage floors, such as one for a phase change heat storage floor structure (authorization number CN 208518269 U). This structure combines phase change materials with traditional flooring to effectively reduce the on-time of radiant floor heating, achieving energy savings and peak shaving for electricity consumption. However, this patent has several drawbacks. Firstly, the system does not consider the introduction of fresh air, leading to a decline in indoor air quality during long-term operation. Secondly, the heat storage layer and underfloor heating pipes are arranged vertically, requiring the heat from the pipes to sequentially heat the concrete layer, heat storage layer, leveling layer, and finishing layer upon system startup, inevitably resulting in a slow system start-up. Patent CN204227609U, which arranges phase change energy storage materials and water supply pipes in an alternating pattern, also suffers from slow start-up and difficulty in rapidly charging the energy storage material. Although patents CN105066217A, CN102677860A, and CN205897302U wrap the heating branch pipes in heat storage material to avoid the problem of slow heat start-up, the system lacks a fresh air structure, which also leads to the problem of declining indoor air quality during long-term operation. Utility Model Content

[0004] The purpose of this utility model is to provide a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system. Through the integrated innovation of multiple technologies such as phase change energy storage module, exhaust heat recovery and channel fresh air, it realizes energy-saving control of vertical sleeve geothermal ventilation and building thermal environment, and provides a feasible solution for efficient, low-carbon and comfortable green building system.

[0005] To achieve the above objectives, this utility model provides a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system, including a room and a fresh air preheating system. One end of the fresh air preheating system draws in outside air, and the other end passes through the room and connects to one end of the fresh air duct. The end of the fresh air duct near the fresh air preheating system is located on the bottom side of the room, and the other end is located on the upper side of the wall inside the room away from the fresh air preheating system. An internal mezzanine is also provided on the bottom side of the room. A phase change energy storage module is provided at the top of the internal mezzanine. A capillary hot water pipe network is provided between the upper side of the phase change energy storage module and the internal mezzanine. An exhaust system is provided at the end of the internal mezzanine near the fresh air preheating system. One end of the exhaust system is located on the upper surface of the internal mezzanine, and the other end passes through the internal mezzanine, the fresh air duct, and the room and is located on the outside of the room.

[0006] Preferably, the building structure includes walls, floors, and a roof. The floors are located above the ground, and there are four walls located on the upper side of the floors. A cavity is provided in the wall on the side away from the fresh air preheating system, and the roof is located above the four walls.

[0007] Preferably, the fresh air preheating system includes an outer pipe and an inner pipe. Outside air enters the fresh air preheating system through one end of the outer pipe, and this end is equipped with a filter screen. The other end of the outer pipe extends vertically into the ground. One end of the inner pipe passes through the outer pipe and extends vertically into the ground together with the outer pipe. The other end passes through a wall near the fresh air preheating system and is connected to the fresh air duct. Both the outer pipe and the inner pipe are made of stainless steel. A 50mm thick polyurethane insulation pipe is installed on the outside of the inner pipe.

[0008] Preferably, the fresh air duct includes a ventilation tunnel, a fresh air fan, and automatically adjustable louvers. The ventilation tunnel is located between four walls above the floor slab. The end of the ventilation tunnel closest to the fresh air preheating system is provided with a fresh air inlet connected to the inner pipe, and the other end away from the fresh air preheating system is connected to one end of the cavity inside the wall. The other end of the cavity inside the wall is connected to the fresh air fan through a fresh air outlet, and the automatically adjustable louvers pass through the inner wall and are connected to the fresh air fan.

[0009] Preferably, the internal interlayer includes a support column structure, a polyester insulation layer, and a surface floor. The polyester insulation layer is located above the ventilation duct. There are several support column structures, each of which includes a support column and a frame column. One end of the support column is fixed to the upper side of the floor slab, and the other end is connected to the lower side of the polyester insulation layer to support the polyester insulation layer. One end of the frame column is connected to the upper side of the polyester insulation layer, and the other end is connected to the surface floor to support the surface floor.

[0010] Preferably, there are several phase change energy storage modules, each of which is embedded in the upper surface of the support column and connected to the lower surface of the surface floor. The phase change energy storage modules are interconnected. Each phase change energy storage module includes a positioning protrusion, a capillary network groove, a positioning recess, a metal container, and fins. There are two positioning protrusions and two positioning recesses, and one positioning protrusion and one positioning recess are symmetrically arranged on both sides of the metal container. The capillary network groove is located on the upper surface of the metal container, and the upper surface of the metal container is also connected to the surface floor. There are several fins, which are evenly arranged around the metal container. The interior of the metal container is filled with phase change energy storage filler.

[0011] Preferably, the diameter of the capillary hot water pipe network is slightly smaller than that of the capillary network groove, and includes a distributor, a supply branch, a return branch, and a collector. One end of the distributor is connected to one end of the main supply pipe, and the other end of the main supply pipe is connected to the water supply outlet of the hot water source. The other end of the distributor is connected to the supply branch. One end of the return branch is connected to the end of the supply branch away from the distributor, and the other end of the return branch is connected to the collector. The collector is also connected to one end of the return main pipe, and the other end of the return main pipe is connected to the return outlet of the hot water source. The main supply pipe, the supply branch, the return branch, and the return main pipe are all located at the capillary network groove.

[0012] Preferably, the exhaust system includes an exhaust fan, an exhaust duct, a heat exchange finned tube, and an exhaust duct outlet. The exhaust fan is located on the side of the surface floor near the fresh air inlet, and the air inlet of the exhaust fan is located on the surface of the surface floor. The indoor exhaust outlet of the exhaust fan is connected to the exhaust duct, and a filter screen is installed at the connection. The exhaust duct is embedded in the ventilation channel, and the heat exchange finned tube is located on the outside of the exhaust duct. The exhaust duct outlet is located at the end of the exhaust duct away from the exhaust fan and passes through the wall to the outside.

[0013] Therefore, the vertical geothermal ventilation and phase change energy storage floor fresh air coupling system of the present invention, which adopts the above structure, has the following advantages:

[0014] 1. By using a fresh air preheating system with vertical sleeves (the underground parts of the outer and inner pipes) buried underground, the air is pre-cooled or preheated before entering the room, which can significantly reduce the air conditioning load and improve the building's energy efficiency.

[0015] 2. It has the characteristic of intermittent operation, which can store energy during off-peak hours and release heat / cold during peak hours, forming a good dynamic coupling with the heat storage and release process of phase change materials, and realizing the energy-saving operation mode of "peak shaving and valley filling";

[0016] 3. The fresh air duct is supported by a support column structure, and the exhaust waste heat is used for fresh air preheating. This not only effectively recovers indoor waste heat, but also solves the problem of inaccurate metering by household in traditional underfloor heating systems.

[0017] 4. By setting up an exhaust system, the heat from the exhaust is used to reheat the fresh air, reducing the energy burden required for the introduction of external fresh air and further improving the overall energy efficiency of the system while ensuring indoor air quality.

[0018] 5. The modular phase change energy storage unit facilitates prefabrication and on-site integration, reducing the complexity and cost of decoration and construction.

[0019] 6. The system adopts a channel-type fresh air supply method to replace the traditional central air conditioning fresh air system, which not only ensures the circulation of fresh air, but also effectively reduces the system's energy consumption;

[0020] 7. Radiant heating, compared to traditional radiator systems, has lower requirements for indoor temperature control, higher energy efficiency, and significantly improved indoor thermal comfort.

[0021] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] Figure 1 This is a side sectional view of a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to the present invention.

[0023] Figure 2 This is an indoor part diagram of a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to this utility model;

[0024] Figure 3 This is a diagram of the capillary hot water pipe network of a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to this utility model;

[0025] Figure 4 This is a diagram showing the relationship between the exhaust system and the fresh air duct of a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to this utility model.

[0026] Figure 5 This is a diagram of the exhaust system of a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to this utility model;

[0027] Figure 6 This is a diagram of a phase change energy storage module for a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to this utility model.

[0028] Figure Labels

[0029] 1. Building structure; 11. Walls; 12. Floors; 13. Roof; 14. Internal cavity; 2. Fresh air preheating system; 21. External duct; 22. Internal duct; 23. Filter; 3. Fresh air duct; 31. Ventilation tunnel; 32. Fresh air fan; 33. Automatic adjustable louvers; 34. Fresh air inlet; 35. Fresh air outlet; 4. Internal mezzanine; 41. Support column structure; 411. Support column; 412. Support column; 42. Polyester insulation layer; 43. Surface floor; 5. Phase Phase change energy storage module; 51. Positioning protrusion; 52. Capillary network groove; 53. Positioning recess; 54. Metal container; 55. Fin; 56. Phase change energy storage packing; 6. Capillary hot water network; 61. Water distributor; 62. Water supply branch; 63. Return water branch; 64. Water collector; 65. Water supply main; 66. Return water main; 7. Exhaust system; 71. Exhaust fan; 72. Exhaust duct; 73. Heat exchange finned tube; 74. Exhaust duct outlet; 75. Filter screen. Detailed Implementation

[0030] Example

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] like Figures 1-6 As shown, this utility model discloses a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system, including a room 1 and a fresh air preheating system 2. One end of the fresh air preheating system 2 draws in outside air, and the other end passes through the room 1 and is connected to one end of the fresh air duct 3. The end of the fresh air duct 3 near the fresh air preheating system 2 is located on the bottom side inside the room 1, and the other end is located on the upper side of the wall 11 inside the room 1 away from the fresh air preheating system 2. An internal mezzanine 4 is also provided on the bottom side inside the room 1. A phase change energy storage module 5 is provided on the top of the internal mezzanine 4. A capillary hot water pipe network 6 is provided between the upper side of the phase change energy storage module 5 and the internal mezzanine 4. An exhaust system 7 is provided on the end of the internal mezzanine 4 near the fresh air preheating system 2. One end of the exhaust system 7 is located on the upper surface of the internal mezzanine 4, and the other end passes through the internal mezzanine 4, the fresh air duct 3, and the room 1 and is located on the outside of the room 1.

[0038] The building 1 includes walls 11, floors 12 and roof 13. The floors 12 are located above the ground. There are four walls 11 located on the upper side of the floors 12. A cavity 14 is provided in the wall 11 on the side away from the fresh air preheating system 2. The roof 13 is located above the four walls 11.

[0039] The fresh air preheating system 2 includes an outer pipe 21 and an inner pipe 22. External air enters the fresh air preheating system 2 through one end of the outer pipe 21, and a filter screen 23 is installed at this end. The other end of the outer pipe 21 extends vertically into the ground. One end of the inner pipe 22 passes through the outer pipe 21 and extends vertically into the ground together with the outer pipe 21. The other end passes through a wall 11 near the fresh air preheating system 2 and is connected to the fresh air duct 3. Both the outer pipe 21 and the inner pipe 22 are made of stainless steel. A 50mm thick polyurethane insulation pipe is installed on the outside of the inner pipe 22.

[0040] The fresh air duct 3 includes a ventilation tunnel 31, a fresh air fan 32, and an automatic adjustable louver 33. The ventilation tunnel 31 is located between four walls 11 above the floor slab 12. The end of the ventilation tunnel 31 closest to the fresh air preheating system 2 is provided with a fresh air inlet 34 connected to the inner pipe 22, and the other end away from the fresh air preheating system 2 is connected to one end of the cavity 14 inside the wall. The other end of the cavity 14 inside the wall is connected to the fresh air fan 32 through the fresh air outlet 35. The automatic adjustable louver 33 passes through the inner wall 11 and is connected to the fresh air fan 32.

[0041] The internal interlayer 4 includes a support column structure 41, a polyester insulation layer 42, and a surface floor 43. The polyester insulation layer 42 is located above the ventilation duct 31. There are several support column structures 41, each of which includes a support column 411 and a support column 412. One end of the support column 411 is fixed to the upper side of the floor slab 12, and the other end is connected to the lower side of the polyester insulation layer 42 to support the polyester insulation layer 42. One end of the support column 412 is connected to the upper side of the polyester insulation layer 42, and the other end is connected to the surface floor 43 to support the surface floor 43.

[0042] There are several phase change energy storage modules 5. Each phase change energy storage module 5 is embedded in the upper surface of the support column 412 and is in contact with the lower surface of the surface floor 43. The phase change energy storage modules 5 are interconnected. Each phase change energy storage module 5 includes a positioning protrusion 51, a capillary network groove 52, a positioning recess 53, a metal container 54, and fins 55. There are two positioning protrusions 51 and two positioning recesses 53. One positioning protrusion 51 and one positioning recess 53 are symmetrically arranged on both sides of the metal container 54. The capillary network groove 52 is located on the upper surface of the metal container 54. The upper surface of the metal container 54 is also in contact with the surface floor 43. There are several fins 55, which are evenly arranged around the metal container 54. The metal container 54 is filled with phase change energy storage filler 56.

[0043] The diameter of the capillary hot water network 6 is slightly smaller than that of the capillary network groove 52. It includes a distributor 61, a supply branch 62, a return branch 63, and a collector 64. One end of the distributor 61 is connected to one end of the main supply pipe 65, and the other end of the main supply pipe 65 is connected to the water supply port of the hot water source. The other end of the distributor 61 is connected to the supply branch 62. One end of the return branch 63 is connected to the end of the supply branch 62 away from the distributor 61, and the other end of the return branch 63 is connected to the collector 64. The collector 64 is also connected to one end of the return main pipe 66, and the other end of the return main pipe 66 is connected to the return port of the hot water source. The main supply pipe 65, the supply branch 62, the return branch 63, and the return main pipe 66 are all located at the capillary network groove 52.

[0044] The exhaust system 7 includes an exhaust fan 71, an exhaust duct 72, a heat exchange finned tube 73, and an exhaust duct outlet 74. The exhaust fan 71 is located on the side of the surface floor 43 near the fresh air inlet 34, and the air inlet of the exhaust fan 71 is located on the surface of the surface floor 43. The indoor exhaust outlet of the exhaust fan 71 is connected to the exhaust duct 72, and a filter screen 75 is installed at the connection. The exhaust duct 72 is embedded in the ventilation tunnel 31, and the heat exchange finned tube 73 is located on the outside of the exhaust duct 72. The exhaust duct outlet 74 is located at the end of the exhaust duct 72 away from the exhaust fan 71, and passes through the wall 11 to the outside.

[0045] The phase change energy storage module 5 selected in this embodiment has a metal container 54 with dimensions of 260mm×260mm×20mm and good thermal conductivity. The fins 55 have a spacing of 50mm. The phase change energy storage filler 56 inside is 38℃ paraffin wax with 5%-10% graphene added. Before being added to the container, the two are stirred into a viscous state. The surface and bottom plates are made of wood flooring with good thermal conductivity. The capillary hot water pipe network 6 supplies heat to the room through heat exchange in the form of radiation and convection. The main water supply pipe 65 and the main water return pipe 66 in the capillary hot water pipe network 6 are made of high-strength and durable PC pipes. The design of the flexible hose at the connection reduces local head loss and prevents water pipe rupture due to thermal expansion and contraction. The ventilation tunnel 31 has a height of 60-80mm.

[0046] When working, the heating demand in the residential buildings is first divided into weekday and weekend conditions;

[0047] Heating during weekdays is concentrated between 6:30-8:00 AM and 6:00-11:00 PM. From 5:30-6:30 AM, the hot water source heat pump is switched to heating mode, with its power exceeding the indoor heat load. The capillary hot water network 6 stores heat for the phase change material, while simultaneously preheating the indoor environment. Specifically, hot water is distributed from the main supply pipe of the capillary network system to the distributor 61, then flows sequentially through the supply branch pipe and return branch pipe 63 to the collector 64, and finally returns to the hot water source through the return main pipe 66. From 6:30-8:00 AM, the heat pump is turned off, and the phase change material releases heat into the room to bear the heating load. For the heating demand from 6:00-11:00 PM, the heat pump needs to be turned on to heating mode to store heat for the phase change material between 3:00-6:00 PM, and the process is the same as from 5:30-6:30 AM. The hot water pipe network system is shut off from 18:00 to 23:00, and the phase change material releases heat into the room to bear the heating load. During the heating season, i.e., 6:30-8:00 and 18:00-23:00, if the phase change material fully releases its latent heat of phase change and its temperature drops, resulting in insufficient indoor heating and the room temperature drops below 16℃, the hot water pipe network system is restarted to the insulation setting. The supply water temperature decreases, causing the phase change material temperature to fall below its melting point. The hot water pipe network then only bears the heat load within the room. During this process, the fresh air preheating system 2 draws in outside air and preheats it. After preheating... As the air enters the ventilation duct 31 through the fresh air inlet 34, it is reheated by the exhaust air from the exhaust system 7. The air reheated in the ventilation duct 31 is then reheated by the hot water in the capillary hot water network 6. It then enters the room through the wall cavity 14 and the fresh air fan 32 through the automatic adjustment louvers 33. After circulating in the room, the hot air is drawn by the exhaust fan 71 and discharged to the outside through the exhaust pipe 72 and the exhaust pipe outlet 74. During this process, the preheated air entering the ventilation duct 31 through the fresh air inlet 34 is reheated.

[0048] The weekend heating period is from 8:00 AM to 11:00 PM. Considering the concentrated heating time, the heat pump will be turned on in heating mode from 11:00 PM to 7:00 AM, with the hot water network storing heat for the phase change material (PCM). This process is the same as on weekdays from 5:30 AM to 6:30 AM and 3:00 PM to 6:00 PM. During the morning, the heat pump will be turned off, and the PCM will transfer heat to the room to handle the heating load. However, the indoor temperature will still be monitored by temperature sensors. If the indoor air temperature drops below 16°C, the hot water network system will be turned back on to the insulation mode. From 3:00 PM to 6:00 PM, the heat pump will be turned on in heating mode to store heat for the PCM. From 6:00 PM to 11:00 PM, the hot water network system will be turned off, and the indoor temperature will be monitored by temperature sensors. If the room temperature drops below 16°C, the hot water network system will be turned on and adjusted to the insulation mode. The entire process uses the same method as on weekdays to heat the air. By rationally linking phase change heat storage and heat release, the system achieves staggered operation, thereby saving a significant amount of electricity costs.

[0049] Therefore, this utility model, employing the aforementioned structure, provides a vertical geothermal ventilation and phase change energy storage floor fresh air coupling system. Through a vertical sleeve (the underground portions of the outer and inner pipes) embedded underground in the fresh air preheating system, pre-cooling or preheating is performed on the air before it enters the room, significantly reducing air conditioning load and improving building energy efficiency. It features intermittent operation, storing energy during off-peak hours and releasing heat / cold during peak hours, forming a good dynamic coupling with the heat storage and release process of the phase change material, achieving a "peak shaving and valley filling" energy-saving operation mode. The use of a support column structure to support the fresh air duct utilizes the exhaust waste heat for fresh air preheating, effectively recovering indoor waste heat and solving the problem of separate metering in traditional underfloor heating systems. The system addresses the issue of inaccurate air measurement. By implementing an exhaust system, the heat from the exhaust is used to reheat the fresh air, reducing the energy burden required for introducing external fresh air and improving overall system energy efficiency while ensuring indoor air quality. The use of modular phase-change energy storage units facilitates prefabrication and on-site integration, reducing the complexity and cost of construction. The system employs a duct-type fresh air supply method, replacing the traditional central air conditioning system, ensuring fresh air circulation and effectively reducing system energy consumption. Radiant heating, compared to traditional radiator systems, has lower requirements for indoor temperature control, a higher energy efficiency ratio, and significantly improves indoor thermal comfort.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A vertical geothermal ventilation and phase change energy storage floor fresh air coupling system, characterized in that: The system includes a building and a fresh air preheating system. One end of the fresh air preheating system draws in outside air, and the other end passes through the building and connects to one end of the fresh air duct. The end of the fresh air duct closest to the fresh air preheating system is located on the bottom side of the building, and the other end is located on the upper side of the wall inside the building, away from the fresh air preheating system. An internal mezzanine is also provided on the bottom side of the building. A phase change energy storage module is installed at the top of the internal mezzanine. A capillary hot water pipe network is installed between the upper side of the phase change energy storage module and the internal mezzanine. An exhaust system is provided at the end of the internal mezzanine closest to the fresh air preheating system. One end of the exhaust system is located on the upper surface of the internal mezzanine, and the other end passes through the internal mezzanine, the fresh air duct, and the building, located on the outside of the building.

2. The vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 1, characterized in that: The building consists of walls, floors, and a roof. The floors are located above the ground. There are four walls located on the upper side of the floors. The wall away from the fresh air preheating system has an internal cavity. The roof is located above the four walls.

3. The vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 2, characterized in that: The fresh air preheating system includes an outer pipe and an inner pipe. Outside air enters the fresh air preheating system through one end of the outer pipe, which is equipped with a filter. The other end of the outer pipe extends vertically into the ground. One end of the inner pipe passes through the outer pipe and extends vertically into the ground together with the outer pipe. The other end passes through a wall near the fresh air preheating system and connects to the fresh air duct. Both the outer and inner pipes are made of stainless steel, and the outer side of the inner pipe is equipped with a 50mm thick polyurethane insulation pipe.

4. The vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 3, characterized in that: The fresh air duct includes a ventilation tunnel, a fresh air fan, and automatically adjustable louvers. The ventilation tunnel is located between four walls above the floor slab. The end of the ventilation tunnel closest to the fresh air preheating system is equipped with a fresh air inlet connected to the inner pipe, and the other end away from the fresh air preheating system is connected to one end of the cavity inside the wall. The other end of the cavity inside the wall is connected to the fresh air fan through a fresh air outlet. The automatically adjustable louvers pass through the inner wall and are connected to the fresh air fan.

5. The vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 4, characterized in that: The internal interlayer includes a support column structure, a polyester insulation layer, and a surface floor. The polyester insulation layer is located above the ventilation duct. There are several support column structures, each of which includes a support column and a frame column. One end of the support column is fixed to the upper side of the floor slab, and the other end is connected to the lower side of the polyester insulation layer to support it. One end of the frame column is connected to the upper side of the polyester insulation layer, and the other end is connected to the surface floor to support it.

6. The vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 5, characterized in that: There are several phase change energy storage modules, each of which is embedded in the upper surface of the support column and connected to the lower surface of the surface floor. The phase change energy storage modules are interconnected. Each phase change energy storage module includes positioning protrusions, capillary network grooves, positioning recesses, a metal container, and fins. There are two positioning protrusions and two positioning recesses, and one positioning protrusion and one positioning recess are symmetrically arranged on both sides of the metal container. The capillary network groove is located on the upper surface of the metal container, and the upper surface of the metal container is also connected to the surface floor. There are several fins, which are evenly arranged around the metal container. The interior of the metal container is filled with phase change energy storage filler.

7. A vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 6, characterized in that: The diameter of the capillary hot water pipe network is slightly smaller than that of the capillary network groove. It includes a distributor, supply branches, return branches, and a collector. One end of the distributor is connected to one end of the main supply pipe, and the other end of the main supply pipe is connected to the water inlet of the hot water source. The other end of the distributor is connected to the supply branches. One end of the return branch is connected to the end of the supply branch away from the distributor, and the other end of the return branch is connected to the collector. The collector is also connected to one end of the return main pipe, and the other end of the return main pipe is connected to the return outlet of the hot water source. The main supply pipe, supply branches, return branches, and return main pipe are all located in the capillary network groove.

8. A vertical geothermal ventilation and phase change energy storage floor fresh air coupling system according to claim 7, characterized in that: The exhaust system includes an exhaust fan, exhaust duct, heat exchange finned tubes, and exhaust duct outlet. The exhaust fan is located on the side of the surface floor near the fresh air inlet, and the air inlet of the exhaust fan is located on the surface of the surface floor. The indoor exhaust outlet of the exhaust fan is connected to the exhaust duct, and a filter screen is installed at the connection. The exhaust duct is embedded in the ventilation channel, and the heat exchange finned tubes are located on the outside of the exhaust duct. The exhaust duct outlet is located at the end of the exhaust duct away from the exhaust fan and passes through the wall to the outside.

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