A new fresh air system for a helical buried pipe energy pile-photovoltaic coupling residence

Abstract

The application provides a spiral buried pipe energy pile-photovoltaic coupling fresh air system for residence, which comprises a spiral buried pipe energy pile unit, a fresh air introduction unit, a fresh air treatment module, a photovoltaic power supply module and an indoor air supply unit; the spiral buried pipe energy pile unit is combined with a building pile foundation, the buried pipe land area and the drilling cost are saved, photovoltaic power supply is used, the daily operation cost can be significantly reduced, and clean and cheap fresh air is provided for users; the application uses clean and renewable geothermal energy to realize the refrigeration and heating functions of the fresh air unit, adopts a solar energy coupling mode to provide the power consumption required by the equipment, and can greatly reduce the energy consumption while increasing the heat exchange amount of a single pile foundation.

Description

Technical Field

[0001] This invention belongs to the field of building heating, ventilation and air conditioning technology, and particularly relates to a spiral buried pipe energy pile-photovoltaic coupled residential fresh air system. Background Technology

[0002] In recent years, with the improvement of people's living standards in my country, people's requirements for indoor air quality have entered a new stage. Currently, introducing fresh air into residential buildings faces many challenges. For example, rapid urbanization has led to a significant increase in car ownership, and vehicle exhaust emissions from roads surrounding residences mean that outdoor air quality is insufficient to directly meet indoor cleanliness and ventilation requirements. At the same time, increasing the amount of pollution-free fresh air indoors also helps reduce the chances of indoor virus survival.

[0003] According to relevant researchers, the energy consumption for fresh air treatment in air conditioning systems accounts for 25%-30% of the total energy consumption, and can be as high as 40% for high-end hotels and office buildings. Therefore, the increase in energy consumption for fresh air treatment in my country each year due to the promotion of fresh air systems in residential buildings will be considerable.

[0004] Energy piles combine building pile foundations with buried pipe heat exchangers, utilizing the relatively stable soil temperature below 5m above the ground, which is approximately equal to the local annual average temperature. The soil serves as the heat source and cold source for the air conditioning system. Currently proposed soil-based air conditioning systems are less affected by the outdoor environment throughout the year, and their stable operation effectively reduces energy consumption. However, the installed capacity of energy pile systems is limited by the number of piles and the heat exchange area of ​​the buried pipes. Furthermore, the related pumps and water source heat pumps still consume a significant amount of electricity during operation. These drawbacks restrict the application of this green air conditioning system in practical engineering projects. Therefore, designing a new type of energy pile system that increases the heat exchange capacity of a single pile foundation while reducing the overall system's energy consumption has become a key focus in the field of energy pile applications. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a spiral buried pipe energy pile-photovoltaic coupled residential fresh air system. It utilizes clean and renewable geothermal energy to achieve the cooling and heating functions of the fresh air unit, and uses solar coupling to provide the electrical energy required by the equipment. While increasing the heat exchange of a single pile foundation, it can greatly reduce energy consumption.

[0006] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0007] A spiral buried pipe energy pile-photovoltaic coupled residential fresh air system includes a spiral buried pipe energy pile unit, a fresh air introduction unit, a fresh air treatment module, a photovoltaic power supply module, and an indoor air supply unit. The spiral buried pipe energy pile unit is connected to the heat exchanger inlet and outlet of the fresh air treatment module via water pipes. The air inlet of the fresh air treatment module is connected to the fresh air introduction unit, and the air outlet is connected to the indoor air supply unit. The photovoltaic power supply module supplies power to the fresh air treatment module and the spiral buried pipe energy pile unit.

[0008] Furthermore, the spiral buried pipe energy pile unit includes multiple spiral buried pipe heat exchangers pre-embedded in the building pile foundation. The spiral buried pipe heat exchangers are connected to a water collector through a horizontal water collection pipe. The water collector is connected to the condenser in the fresh air treatment module through a water pipe, and a ground source side water supply pump is installed on the connecting pipe. The condenser is also connected to a water distributor through a water pipe. The water distributor is connected to the spiral buried pipe heat exchangers through a horizontal water distribution pipe, forming a complete loop.

[0009] Furthermore, the fresh air handling module includes a fresh air re-filter, an evaporator, a supply fan, a check valve, a condenser, a compressor, and a four-way reversing valve. The outdoor fresh air introduced by the fresh air introduction unit exchanges heat with the Freon output by the compressor on the surface of the evaporator through the fresh air re-filter, and then is sent out from the air outlet of the fresh air handling module to the indoor air supply unit by the supply fan. The four-way reversing valve is connected to the compressor, condenser, and evaporator, and realizes the switching between the condenser and evaporator based on the four-way reversing valve to achieve the cooling and heating functions.

[0010] Furthermore, the fresh air introduction unit includes a rectangular duct, the front of which is buried underground and the inlet extends to the ground surface. The rear of the rectangular duct is connected to the air inlet of the fresh air treatment module. An insect screen is installed at the inlet of the rectangular duct, and a rainproof vent is installed above the inlet of the rectangular duct. Outdoor fresh air undergoes preheating with the soil through the buried rectangular duct before entering the fresh air treatment module for filtration and heat / cold treatment.

[0011] Furthermore, the indoor air supply unit includes an air supply duct, one end of which is connected to the air outlet of the fresh air handling module, and the other end extends into the room with an air supply louvered outlet installed at the lower end.

[0012] Furthermore, the photovoltaic power supply module includes solar panels arranged on the roof. The solar panels absorb solar heat energy and convert it into direct current, which is collected through a combiner box, converted into alternating current by an inverter, and connected to a distribution box to power the compressor and the ground source water pump. Excess electrical energy is stored in a battery bank, which discharges at night.

[0013] The present invention has the following beneficial effects: This invention utilizes soil energy and solar energy to process outdoor fresh air, providing users with fresh air that meets the indoor heating and cooling load requirements of buildings. Compared to traditional direct-buried ground source heat pump heat exchangers, the spiral buried pipe energy pile-photovoltaic coupled residential fresh air system of this invention, combined with the building's pile foundation, saves on the floor space and drilling costs associated with buried pipes. Furthermore, compared to unidirectional flow fans and other fresh air treatment systems, this spiral buried pipe energy pile-photovoltaic coupled residential fresh air system utilizes photovoltaic power, significantly reducing daily operating costs and providing users with clean and inexpensive fresh air. This invention uses clean, renewable geothermal energy to achieve the cooling and heating functions of the fresh air unit, and employs solar energy coupling to provide the necessary electrical energy for the equipment, greatly reducing energy consumption while increasing the heat exchange capacity of a single pile foundation. Attached Figure Description

[0014] Figure 1 A schematic diagram of a spiral buried pipe energy pile-photovoltaic coupled residential fresh air system; Figure 2 This is a schematic diagram of a fresh air handling module. Figure 3 Layout diagram of the fresh air intake unit; Figure 4 Layout diagram of photovoltaic power supply module and indoor air supply unit; Figure 5 This is a layout diagram of a spiral-type buried pipe energy pile unit.

[0015] In the diagram: 1- Spiral buried pipe energy pile unit; 1-1- Spiral buried pipe heat exchanger; 1-4- Horizontal water collection pipe; 1-5- Horizontal water distribution pipe; 1-6- Water collector; 1-7- Water distributor; 1-8- Ground source side water supply pump; 2- Roof; 3- Building pile foundation; 4- Fresh air introduction unit; 4-1- Rainproof vent; 4-2- Insect screen; 4-3- Rectangular duct; 5- Fresh air treatment module; 5-1- Air outlet; 5-2- Fresh air re-filtration 5-3-Evaporator; 5-4-Air supply fan; 5-5-Check valve; 5-6-Condenser; 5-7-Compressor; 5-8-Four-way reversing valve; 6-Photovoltaic power supply module; 6-1-Roof solar panel; 6-2-Combiner box; 6-3-Charge and discharge controller; 6-4-Battery pack; 6-5-Inverter; 6-6-Distribution box; 7-Indoor air supply unit; 7-1-Air supply duct; 7-2-Air supply louver outlet; Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0017] like Figure 1As shown, the spiral buried pipe energy pile-photovoltaic coupled residential fresh air system of the present invention includes a spiral buried pipe energy pile unit 1, a fresh air introduction unit 4, a fresh air treatment module 5, a photovoltaic power supply module 6, and an indoor air supply unit 7.

[0018] like Figure 1 , 2 As shown in Figure 5, the spiral buried pipe energy pile unit 1 includes a spiral buried pipe heat exchanger 1-1, a horizontal water collection pipe 1-4, a horizontal water distribution pipe 1-5, a water collector 1-6, a water distributor 1-7, and a ground source side water supply pump 1-8. The spiral buried pipe heat exchanger 1-1 is a spiral-shaped heat exchange pipe made of high-density polyethylene and is pre-embedded in the building pile foundation 3. Multiple spiral buried pipe heat exchangers 1-1 are connected to the water collector 1-6 through the horizontal water collection pipe 1-4. The water collector 1-6 is connected to the condenser 5-6 in the fresh air treatment module 5 through a water pipe, and the ground source side water supply pump 1-8 is installed on the connecting pipe. The condenser 5-6 is also connected to the water distributor 1-7 through a water pipe. The water distributor 1-7 is connected to the spiral buried pipe heat exchanger 1-1 through the horizontal water distribution pipe 1-5, forming a complete loop. In practical applications, the fluid medium in the spiral buried tube heat exchanger 1-1 exchanges heat with the geothermal energy and then flows through the horizontal water collection pipe 1-4 to the water collector 1-6, and then enters the condenser 5-6 through the ground source side water supply pump 1-8.

[0019] like Figure 1 , 3 As shown, the fresh air introduction unit 4 includes a rainproof vent 4-1, an insect-proof net 4-2, and a rectangular duct 4-3. The front of the rectangular duct 4-3 is buried underground, with its front end (i.e., the inlet) extending beyond the ground surface. The rear of the rectangular duct 4-3 connects to the air inlet of the fresh air treatment module 5. The insect-proof net 4-2 is installed at the inlet of the rectangular duct 4-3, and the rainproof vent 4-1 is installed above the inlet of the rectangular duct 4-3. Outdoor fresh air undergoes pre-heat exchange with the soil through the buried rectangular duct 4-3 before entering the fresh air treatment module 5 for filtration and heat / cold treatment.

[0020] like Figure 1 , 2 As shown, the fresh air handling module 5 includes a fresh air re-filter 5-2, an evaporator 5-3, a supply fan 5-4, a check valve 5-5, a condenser 5-6, a compressor 5-7, and a four-way reversing valve 5-8. Outdoor fresh air introduced by the fresh air introduction unit 4 exchanges heat with the Freon output from the compressor 5-7 via the fresh air re-filter 5-2 on the surface of the evaporator 5-3, and is then delivered by the supply fan 5-4 from the outlet 5-1 of the fresh air handling module 5 to the indoor air supply unit 7. The four-way reversing valve 5-8 is connected to the compressor 5-7, condenser 5-6, and evaporator 5-3, enabling the switching between the condenser 5-6 and the evaporator 5-3 to achieve cooling and heating functions.

[0021] like Figure 1 , 2 As shown in Figure 4, the indoor air supply unit 7 includes an air supply duct 7-1 and an air supply louvered vent 7-2. One end of the air supply duct 7-1 is connected to the air outlet of the fresh air handling module 5, and the other end extends into the room with an air supply louvered vent 7-2 installed at the lower outlet.

[0022] like Figure 1 , 2 As shown, the photovoltaic power supply module 6 includes rooftop solar panels 6-1, a combiner box 6-2, a charge / discharge controller 6-3, a battery pack 6-4, an inverter 6-5, and a distribution box 6-6. The solar panels 6-1, arranged on the roof 2, absorb solar heat and convert it into direct current (DC). This DC power is collected by the combiner box 6-2, converted into alternating current (AC) by the inverter 6-5, and then connected to the distribution box 6-6 to power the compressor 5-7 and the ground-source water pump 1-8. Excess electrical energy is stored in the battery pack 6-4, which discharges at night.

[0023] The spiral buried pipe energy pile unit 1 is connected to the inlet and outlet of the heat exchanger 5-6 of the fresh air treatment module 5 through the ground source side water pump 1-8 and the water distributor 1-7; the distribution box 6-6 of the photovoltaic power supply module 6 supplies power to the fresh air treatment module 5 and the ground source side water pump 1-8 through the wires.

[0024] The method of using the spiral buried pipe energy pile-photovoltaic coupled residential fresh air system described in this invention is as follows: The spiral-type buried tube heat exchanger 1-1 is integrated with the building pile foundation 3 and placed inside the pile foundation 3. It utilizes geothermal energy to exchange heat with the medium inside the heat exchange tube. After heat exchange, the fluid medium enters the condenser 5-6 and exchanges heat with Freon again. The fresh air introduction unit 4 introduces outdoor fresh air into the fresh air treatment module 5 through the rectangular air duct 4-3, where it exchanges heat with Freon. The treated fresh air then enters the room to bear the corresponding heating and cooling loads. The photovoltaic power supply module 6 is connected to the fresh air treatment module 5 and the ground source side water pump 1-8, using solar power to supply power to the fresh air treatment module 5 and the ground source side water pump 1-8, thus completing a complete heat exchange system cycle.

[0025] The embodiments described above are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A spiral buried pipe energy pile-photovoltaic coupled residential fresh air system, characterized in that, It includes a spiral buried pipe energy pile unit (1), a fresh air introduction unit (4), a fresh air treatment module (5), a photovoltaic power supply module (6), and an indoor air supply unit (7); the spiral buried pipe energy pile unit (1) is connected to the inlet and outlet of the condenser (5-6) of the fresh air treatment module (5) through a water pipe, the air inlet of the fresh air treatment module (5) is connected to the fresh air introduction unit (4), and the air outlet is connected to the indoor air supply unit (7); the photovoltaic power supply module (6) supplies power to the fresh air treatment module (5) and the spiral buried pipe energy pile unit (1); The spiral buried pipe energy pile unit (1) includes multiple spiral buried pipe heat exchangers (1-1) pre-embedded in the building pile foundation (3). The spiral buried pipe heat exchanger (1-1) is connected to the water collector (1-6) through the horizontal water collection pipe (1-4). The water collector (1-6) is connected to the condenser (5-6) in the fresh air treatment module (5) through the water pipe, and a ground source side water supply pump (1-8) is installed on the connecting pipe. The condenser (5-6) is also connected to the water distributor (1-7) through the water pipe. The water distributor (1-7) and the spiral buried pipe heat exchanger (1-1) together form a complete loop through the horizontal water distribution pipe (1-5). The fresh air treatment module (5) includes a fresh air re-filter (5-2), an evaporator (5-3), a blower (5-4), a check valve (5-5), a condenser (5-6), a compressor (5-7), and a four-way reversing valve (5-8). The outdoor fresh air introduced by the fresh air introduction unit (4) exchanges heat with the Freon output by the compressor (5-7) through the fresh air re-filter (5-2) on the surface of the evaporator (5-3), and then is sent out by the blower (5-4) from the air outlet (5-1) of the fresh air treatment module (5) to the indoor air supply unit (7). The four-way reversing valve (5-8) is connected to the compressor (5-7), the condenser (5-6), and the evaporator (5-3). Based on the four-way reversing valve (5-8), the condenser (5-6) and the evaporator (5-3) are switched to achieve the cooling and heating functions. The fresh air introduction unit (4) includes a rectangular duct (4-3). The front part of the rectangular duct (4-3) is buried underground and the inlet extends to the ground surface. The rear part of the rectangular duct (4-3) is connected to the air inlet of the fresh air treatment module (5). An insect net (4-2) is set at the inlet of the rectangular duct (4-3), and a rainproof hood (4-1) is set at the upper part of the inlet of the rectangular duct (4-3). Outdoor fresh air is preheated with the soil through the buried rectangular duct (4-3) and then enters the fresh air treatment module (5) for filtration and heat treatment.

2. The spiral buried pipe energy pile-photovoltaic coupled residential fresh air system according to claim 1, characterized in that, The indoor air supply unit (7) includes an air supply duct (7-1), one end of which is connected to the air outlet of the fresh air treatment module (5), and the other end extends into the room and is equipped with an air supply louvered air outlet (7-2) at the lower outlet.

3. The spiral buried pipe energy pile-photovoltaic coupled residential fresh air system according to claim 1, characterized in that, The photovoltaic power supply module (6) includes a solar panel (6-1) arranged on the roof (2). The solar panel (6-1) absorbs solar heat energy and converts it into direct current. The direct current is collected through the combiner box (6-2) and converted into alternating current through the inverter (6-5). The alternating current is connected to the distribution box (6-6) to supply power to the compressor (5-7) and the ground source side water pump (1-8). Excess electrical energy is stored in the battery pack (6-4). The battery pack (6-4) discharges at night.

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