Passive building fresh air heat recovery system

Abstract

The utility model relates to the technical field of fresh air systems, in particular to a passive building fresh air heat recovery system which comprises a heat recovery device, an exhaust pipe assembly, an air inlet pipe and an air outlet pipe. The heat recovery device comprises a shell, and a first fan, a heat conducting sheet, a baffle plate and a second fan which are sequentially mounted in the shell; a cavity is formed in the heat-conducting fin; the air inlet pipe is communicated with the cavity; the tail ends of the air inlet pipe and the air outlet pipe are arranged outdoors, and the tail end of the exhaust pipe assembly is arranged indoors. And one part of the air inlet pipe is buried underground. By arranging the heat recovery device, when the air outlet pipe exhausts air, heat loss in the room body can be avoided, due to the fact that the heat conducting fins and the baffles are arranged, heat can be recycled, resource loss is reduced, high efficiency is enhanced, practicability is enhanced, and the requirement of a passive building for heat exchange efficiency is met.

Description

Technical Field

[0001] This utility model belongs to the field of fresh air system technology, specifically relating to a passive building fresh air heat recovery system. Background Technology

[0002] Passive ultra-low energy buildings are buildings that adapt to climate characteristics and natural conditions, employ passive technologies, adopt building envelopes with better thermal insulation and airtightness, utilize efficient fresh air heat recovery technology, and make reasonable use of renewable energy to significantly reduce the building's heating and cooling needs, providing a more comfortable indoor environment with less energy consumption.

[0003] A fresh air system is an independent air handling system consisting of a fresh air exchanger and ductwork accessories. The fresh air exchanger filters and purifies outdoor air and then delivers it indoors through ducts.

[0004] In common fresh air systems, most of the heat cannot be recovered and utilized during the circulation process, resulting in energy consumption and insufficient performance, failing to meet the requirements of passive buildings. Therefore, we propose a passive building fresh air heat recovery system. Utility Model Content

[0005] To address the problems existing in the above-mentioned construction technologies, this utility model provides a passive building fresh air heat recovery system, which solves the problems of high construction difficulty, low efficiency, slow progress, difficulty in protecting finished products, and limited functionality when the ceiling and support are constructed independently.

[0006] This utility model proposes a passive building fresh air heat recovery system, including a heat recovery device, an exhaust pipe assembly, an inlet pipe, and an outlet pipe. The heat recovery device includes a housing and a first fan, a heat-conducting plate, a baffle, and a second fan installed sequentially and at intervals within the housing. The exhaust pipe assembly is located at the end of the housing near the first fan, and the inlet pipe and outlet pipe are located at the ends of the housing near the second fan. The heat-conducting plate has a cavity inside, and the inlet pipe communicates with the cavity. The ends of the inlet pipe and the outlet pipe are respectively located outdoors, and the end of the exhaust pipe assembly is located indoors. A portion of the inlet pipe is buried below ground level.

[0007] Furthermore, the heat-conducting sheet has several ventilation holes that communicate with the cavity, equidistantly spaced along the vertical direction on the side closest to the first fan.

[0008] Furthermore, the baffle has several ventilation holes along the vertical direction.

[0009] Furthermore, a recycling hole is provided at the top of the housing.

[0010] Furthermore, the recycling hole is located between the heat-conducting plate and the baffle.

[0011] Furthermore, the second fan is located between the baffle and the outlet pipe, and the second fan is located above the inlet pipe.

[0012] Furthermore, the outdoor end of the air inlet pipe and the air outlet pipe is equipped with a dryer filter and a sealed valve.

[0013] Furthermore, the outer walls of the air inlet pipe and the air outlet pipe are wrapped with rubber and plastic insulation pipes.

[0014] Furthermore, the exhaust pipe assembly includes a first exhaust pipe and a second exhaust pipe; one end of both the first exhaust pipe and the second exhaust pipe extends into the housing, and the other ends are spaced apart.

[0015] Furthermore, the passive building fresh air heat recovery system also includes solar photovoltaic modules, which are connected to the heat recovery device.

[0016] Furthermore, the passive building fresh air heat recovery system also includes an evaporator and a condenser connected in series; the evaporator is connected to the first fan, and the condenser is connected to the second fan.

[0017] Furthermore, the passive building fresh air heat recovery system also includes an anion sterilization device; the anion sterilization device is connected to the air intake pipe.

[0018] The beneficial effects of this utility model are: by setting up a heat recovery device, heat loss inside the room can be avoided when the exhaust pipe is venting. Due to the setting of heat-conducting plates and baffles, heat can be recycled, reducing resource consumption, enhancing efficiency, and improving practicality, thus meeting the heat exchange efficiency requirements of passive buildings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the passive building fresh air heat recovery system of this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the intermediate heat recovery unit;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the central air intake or exhaust pipe located at the outdoor end;

[0022] Figure 4 This is a schematic diagram showing the arrangement of the air intake pipe of this utility model below ground level.

[0023] In the diagram: 1-Heat recovery device; 2-Inlet pipe; 3-Outlet pipe; 4-First exhaust pipe; 5-Second exhaust pipe; 6-Shell; 7-First fan; 8-Heat-conducting plate; 9-Cavity; 10-Recovery hole; 11-Baffle; 12-Second fan; 13-Rubber-plastic insulation pipe; 14-Dryer filter; 15-Sealed valve; 16-Solar photovoltaic module; 17-Evaporator; 18-Condenser; 19-Silver ion sterilization device. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] like Figures 1-3 The passive building fresh air heat recovery system shown includes a heat recovery device 1 and an exhaust pipe assembly connected to the heat recovery device 1. The exhaust pipe assembly includes a first exhaust pipe 4 and a second exhaust pipe 5 arranged at intervals. Both the first exhaust pipe 4 and the second exhaust pipe 5 are connected to the interior of the housing 6. An air inlet pipe 2 and an air outlet pipe 3 are installed on the side of the heat recovery device 1. The end of the air inlet pipe 2 away from the heat recovery device 1 and the end of the air outlet pipe 3 away from the heat recovery device 1 extend to the outer surface of the building body, respectively.

[0026] like Figure 2 As shown, the heat recovery device 1 includes a housing 6, a first fan 7, a heat-conducting plate 8, a baffle 11, and a second fan 12, all installed at intervals along the X direction inside the housing 6. The heat-conducting plate 8 has an internal cavity 9. A recovery hole 10 is located at the top of the housing 6. An air inlet pipe 2 extends into the housing 6 and communicates with the cavity 9. The heat-conducting plate 8 is made of copper. Several ventilation holes communicating with the cavity 9 are equidistantly spaced vertically on the side of the heat-conducting plate 8 near the first fan 7. An air outlet pipe 3 communicates with the housing 6 directly opposite the second fan 12. The recovery hole 10 is located on the housing 6 between the heat-conducting plate 8 and the baffle 11. The baffle 11 has several ventilation holes equidistantly spaced vertically. An exhaust pipe assembly communicates with the housing 6 directly opposite the first fan 7. Sound-absorbing cotton is installed inside the housing 6, and the allowable noise level of the equipment meets the specifications. The baffle 11 is made of a material with low thermal conductivity. Based on a comparison of the thermal conductivity of common metals and considering factors such as durability, aluminum is selected for the baffle 11.

[0027] Air filters are installed at the air outlets of the first exhaust pipe 4 and the second exhaust pipe 5 to purify the air and ensure that the air entering each room is clean and fresh.

[0028] The inlet pipe 2 and outlet pipe 3 should have antifreeze measures, and the inlets should be equipped with a dryer filter 14 and a shut-off valve 15 to prevent external solid impurities from entering the equipment and ensure smooth operation of the pipelines and equipment. The outer walls of the inlet pipe 2 and outlet pipe 3 are wrapped with rubber and plastic insulation pipes 13.

[0029] By setting up a heat recovery device 1, heat loss inside the room can be avoided when the exhaust pipe 3 is venting. Due to the installation of heat-conducting plates 8 and baffles 11, heat can be recycled, reducing resource consumption, enhancing efficiency, and improving practicality.

[0030] The working principle of this utility model is as follows:

[0031] In use, the first fan 7 rotates, allowing outside air to enter the interior of the intake pipe 2 through one end. Part of the intake pipe 2 is buried underground. Heated by geothermal energy, the hot air is transported through the intake pipe 2 into the cavity 9. Then, under the action of the first fan 7, the air is output into the interior of the building through the first exhaust pipe 4 and the second exhaust pipe 5. Figure 4 As shown, the air intake pipe 2 is arranged in an S-shape in the soil below the ground. After the gas enters the soil, the heat absorption and cooling efficiency is greatly improved.

[0032] During exhaust, the second fan 12 rotates, causing the airflow inside the chamber to enter the interior of the shell 6 through the recovery hole 10. Due to the material of the baffle 11, the temperature inside the shell 6 can be blocked, and the heat is absorbed by the heat-conducting plate 8. The absorbed heat is then transported back to the interior of the chamber through the heat-conducting plate 8, and finally enters the airflow through the recovery hole 10 and is discharged through the exhaust pipe 3. By setting the heat recovery device 1, heat loss inside the chamber can be avoided when the exhaust pipe 3 is venting.

[0033] The presence of heat-conducting plates 8 and baffles 11 enables heat recycling, reducing resource consumption, enhancing efficiency, and improving practicality.

[0034] Carbon dioxide concentration detectors can be installed in each room of the building. These detectors can be wirelessly or wiredly connected to the heat recovery system. The fresh air delivery volume can be flexibly adjusted based on the detection data, thereby reducing energy consumption.

[0035] The use of solar photovoltaic modules 16 generates enough new energy to keep the heat recovery device running smoothly, which is more in line with the passive concept of buildings.

[0036] In cold weather, the system prevents internal heat loss by adding evaporators 17 and condensers 18, enabling the building to meet the requirements of a passive building.

[0037] When there is a lot of dust and bacteria in the external air, the silver ion sterilization device 19 is connected to the air inlet pipe 2 to ensure a high level of cleanliness of the indoor air.

[0038] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A passive building fresh air heat recovery system, characterized in that, The heat recovery device, the exhaust pipe assembly, the air inlet pipe and the air outlet pipe; the heat recovery device comprises a shell and a first fan, a heat conducting sheet, a baffle and a second fan which are sequentially and spacedly arranged in the shell; the exhaust pipe assembly is arranged at one end of the shell close to the first fan, and the air inlet pipe and the air outlet pipe are arranged at one end of the shell close to the second fan; the heat conducting sheet is internally provided with a cavity, the air inlet pipe is communicated with the cavity; the ends of the air inlet pipe and the air outlet pipe are arranged outdoors respectively, and the end of the exhaust pipe assembly is arranged indoors; a part of the air inlet pipe is buried below the ground; The end of the air inlet pipe and the air outlet pipe arranged outdoors is provided with a drying filter and a sealing valve; The outer wall of the air inlet pipe and the air outlet pipe is wrapped with an elastoplastic heat preservation pipe; The exhaust pipe assembly comprises a first exhaust pipe and a second exhaust pipe; one end of the first exhaust pipe and the second exhaust pipe extends into the shell, and the other end is arranged at intervals; The passive building fresh air heat recovery system further comprises a solar photovoltaic assembly connected with the heat recovery device; The passive building fresh air heat recovery system further comprises an evaporator and a condenser which are connected in communication; the evaporator is connected with the first fan, and the condenser is connected with the second fan; The passive building fresh air heat recovery system further comprises a silver ion sterilization device; the silver ion sterilization device is communicated with the air inlet pipe.

2. The passive building fresh air heat recovery system according to claim 1, wherein, A plurality of ventilation holes which are communicated with the cavity are equidistantly arranged on the side of the heat conducting sheet close to the first fan in the vertical direction.

3. The passive building fresh air heat recovery system of claim 1, wherein, The baffle is provided with a plurality of ventilation holes in the vertical direction.

4. The passive building fresh air heat recovery system of claim 1, wherein, The top end of the shell is provided with a recovery hole.

5. The passive building fresh air heat recovery system of claim 4, wherein, The recovery hole is located between the heat conducting sheet and the baffle.

6. The passive building fresh air heat recovery system of claim 1, wherein, The second fan is located between the baffle and the air outlet pipe, and the second fan is located above the air inlet pipe.

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