Total heat recovery unit with bypass pipe

Abstract

The invention discloses a total heat recovery unit with a bypass pipe, and belongs to the technical field of heat recovery, the total heat recovery unit comprises a recovery treatment box, the inner wall of the recovery treatment box is connected with a vertical plate, the side surface of the vertical plate is connected with a rotary total heat exchanger in a penetrating manner, and the left and right side surfaces of the vertical plate are connected with partition plates; and a middle pipe is connected to the right side surface of the recovery treatment box in a penetrating manner. According to the rotary total heat exchanger, the temperature sensor, the controller, the driving assembly, the extrusion column, the extrusion hole, a rubber ring and a rubber belt are adopted, so that the air containing capacity of the rotary total heat exchanger is increased, the flow speed of air flowing through the rotary total heat exchanger is effectively reduced, the retention time of the air in the rotary total heat exchanger is prolonged, heat is absorbed more sufficiently, and the heat exchange efficiency is improved. According to the rotary total heat exchanger, the flow speed of the air entering the rotary total heat exchanger during exhausting can be automatically adjusted according to the temperature difference change, and it is ensured that the heat recovery efficiency in the heat exchange process is always kept at a high level.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat recovery, and particularly relates to a total heat recovery unit with a bypass pipe. Background Art

[0002] A total heat recovery unit usually recovers sensible heat and latent heat in the exhaust air through a heat exchanger for pre-treating fresh air, thereby improving energy efficiency. A rotary heat exchanger is used for heat recovery. The rotary heat exchanger is a device with a honeycomb wheel core as the transfer medium. The device consists of a wheel core, a seal, a housing, a power mechanism, etc. With the honeycomb wheel core as the transfer medium, it absorbs energy from high-temperature gas and releases it in low-temperature gas to achieve energy conversion between gases. The core component of the rotary total heat exchanger is a honeycomb-shaped runner that rotates continuously at a speed of 10 - 12 revolutions per minute.

[0003] Disadvantages of the prior art: With the seasonal change of the ambient temperature, the indoor-outdoor temperature difference becomes an important factor affecting building energy consumption. In the process of heat exchange between the exhaust air and the incoming air by the existing rotary heat exchanger, although a certain degree of energy recovery can be achieved, there are still problems of insufficient efficiency. Specifically, after the exhausted air is cooled by heat exchange, its temperature is still higher than the room temperature, while the aspirated incoming air is at room temperature, forming a relatively obvious temperature difference between the two. Analyzing the reason, it may be that the contact time between the rotary heat exchanger and the exhausted air is limited, resulting in insufficient absorption of the heat in the exhausted air, thereby affecting the overall efficiency of heat recovery.

[0004] Based on this, the present invention designs a total heat recovery unit with a bypass pipe to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a total heat recovery unit with a bypass pipe to solve the problems in the above background art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A total heat recovery unit with a bypass pipe, including a recovery and treatment box. The inner wall of the recovery and treatment box is connected with a vertical plate. The side of the vertical plate is penetrated and connected with a rotary total heat exchanger. Both the left and right sides of the vertical plate are connected with partition plates. The right side of the recovery and treatment box is penetrated and connected with an intermediate pipe. The lower part of the right side of the vertical plate is connected with an extension pipe. Rubber bands are provided at the opposite ends of the extension pipe and the intermediate pipe. A rubber ring is connected to the opposite surfaces of the two rubber bands. Two fixing rods are connected to the side of the intermediate pipe. The other end of the fixing rod is connected with a support ring. A rotary control mechanism is connected to the side of the fixing rod. A sliding groove is formed on the side of the support ring. A sliding connection mechanism is slidably connected in the sliding groove. A rotary ring is connected outside the rotary control mechanism. An extrusion hole is formed on the side of the rotary ring. The sliding connection mechanism is slidably arranged in the extrusion hole. Two angle adjustment mechanisms arranged in the extension pipe are connected in the rubber ring. The angle adjustment mechanism is connected with the sliding connection mechanism.

[0007] As a further description of the above technical solution: The partition plate divides the space inside the recovery and treatment box on the upper and lower sides of the partition plate into an air inlet passage and an exhaust passage. The right end of the intermediate pipe is communicated with a connection head. An exhaust head communicated with the exhaust passage is provided on the left side of the recovery and treatment box.

[0008] As a further description of the above technical solution: The left and right sides of the recovery and treatment box are respectively communicated with a fresh air inlet head and a fresh air outlet head. Both the fresh air inlet head and the fresh air outlet head are communicated with the air inlet passage. The front of the intermediate pipe is communicated with an extension bypass pipe penetrating through the front of the recovery and treatment box.

[0009] As a further description of the above technical solution: A temperature sensor is penetrated and connected to the left partition plate. The temperature sensor detects the temperatures of the gas flowing out of the exhaust head and the gas flowing into the fresh air inlet head. A controller is provided on the front of the recovery and treatment box. The temperature sensor is electrically connected to the controller.

[0010] As a further description of the above technical solution: The rotary control mechanism includes a cross bar fixedly connected to the outside of the fixing rod. A driving component is connected to the end of the cross bar. The output shaft of the driving component is fixedly connected with a driving wheel. A connecting tooth is meshed with the side of the driving wheel. The connecting tooth is arranged outside the rotary ring.

[0011] As a further description of the above technical solution: The extrusion hole is set to be arc-shaped. Six extrusion holes are arranged at equal circumferential intervals. The positions of the six extrusion holes correspond to the edge positions of the hexagonally arranged rubber ring.

[0012] As a further description of the above technical solution: The sliding connection mechanism includes an extrusion column, which is cylindrical. The extrusion column is slidably connected to the inner wall of the extrusion hole. One end of the extrusion column close to the support ring is connected with a sliding block, and the sliding block is slidably connected in the sliding groove.

[0013] As a further description of the above technical solution: The sliding block is T-shaped. One side of the extrusion column close to the rubber ring is connected with an intermediate rod. One end of the intermediate rod is fixedly connected to the rubber ring, and the angle adjustment mechanism is fixedly connected to the intermediate rod.

[0014] As a further description of the above technical solution: The angle adjustment mechanism includes a top rod fixedly connected to the intermediate rod. The end of the top rod is slidably connected with a swing guide plate. The swing guide plate is obliquely arranged in the extension pipe. A pin shaft penetrates through the side surface of the swing guide plate, and two support plates are hinged outside the pin shaft.

[0015] As a further description of the above technical solution: The support plates are fixedly connected in the extension pipe. A spring is fixedly connected to the side surface of the swing guide plate, and the spring is fixedly connected in the extension pipe.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: 1. In the present invention, a temperature sensor, a controller, a driving component, an extrusion column, an extrusion hole, a rubber ring and a rubber belt are adopted. When the temperature difference between the fresh air in the intake passage and the air on the left side of the exhaust passage reaches a preset range, the controller responds quickly and automatically activates the driving component. The driving component drives the sliding block to move precisely in the sliding groove through the coordinated rotation of the driving wheel, the connecting teeth and the rotating ring, and then drives the extrusion hole, the extrusion column and the intermediate rod to move synchronously. In this process, the orderly movement of the six intermediate rods causes the rubber ring to open and become larger, and at the same time drives the rubber belts on both sides to deform, resulting in a dynamic change in the space between the rubber ring and the rubber belts. This space change increases the space on the right side of the exhaust passage, thereby increasing its air capacity, effectively reducing the air flow rate of the air flowing through the rotary total heat exchanger. The extension of the residence time of the air inside the rotary total heat exchanger makes the heat absorption more sufficient, significantly reducing the temperature of the air entering the left half of the exhaust passage. The present invention can automatically adjust the air flow rate of the air entering the rotary total heat exchanger during exhaust according to the temperature difference change, ensuring that the heat recovery efficiency of the heat exchange process always remains at a high level.

[0017] 2. In the present invention, a push rod, a swing guide plate, a spring, and a pin shaft are adopted. Through the adjustment of the intermediate rod, the push rod moves away from the swing guide plate. At this time, the spring comes into play and controls the swing guide plate to rotate. This rotation process not only changes the air flow path but also makes the contact angle between the air and the rotary total heat exchanger change dynamically. The air at different angles impacts the surface of the runner, effectively increasing the scouring frequency and intensity of the air on the surface of the runner, ensuring that the air flow can fully cover every area of the runner. This design ingeniously avoids the problem of long-term accumulation of impurities caused by overly single air flow direction, thereby ensuring the cleanliness of the right side of the rotary total heat exchanger. While improving the heat recovery efficiency, the present invention also significantly enhances the self-cleaning ability of the equipment, providing a strong guarantee for long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 6 is a three-dimensional structural schematic diagram of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 2 FIG. 7 is a side three-dimensional structural schematic diagram of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 3 FIG. 8 is a three-dimensional sectional structural schematic diagram of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 4 FIG. 9 is a three-dimensional structural schematic diagram of an extension pipe of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 5 FIG. 10 is a three-dimensional sectional structural schematic diagram of an extension pipe of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 6 FIG. 11 is a three-dimensional structural schematic diagram of a rotation control mechanism of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 7 FIG. 12 is a three-dimensional structural schematic diagram of an extrusion hole of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 8 FIG. 13 is a three-dimensional structural schematic diagram of a rotating ring of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 9 FIG. 14 is a three-dimensional structural schematic diagram of an angle adjustment mechanism of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 10 FIG. 15 is a three-dimensional structural schematic diagram of a sliding groove of a total heat recovery unit with a bypass pipe proposed by the present invention; Figure 11 FIG. 16 is a three-dimensional structural schematic diagram of a sliding connection mechanism of a total heat recovery unit with a bypass pipe proposed by the present invention.

[0019] Legend: 1. Recycling treatment box; 2. Vertical plate; 3. Rotary total heat exchanger; 4. Partition board; 5. Intake air passage; 6. Exhaust air passage; 7. Fresh air outlet head; 8. Fresh air intake head; 9. Exhaust head; 10. Intermediate pipe; 11. Extended bypass pipe; 12. Connector; 13. Extended pipe; 14. Rubber ring; 15. Rubber band; 16. Fixed rod; 17. Support ring; 18. Rotation control mechanism; 181. Cross bar; 182. Driving component; 183. Driving wheel; 184. Connecting tooth; 19. Rotation ring; 20. Extrusion hole; 21. Sliding connection mechanism; 211. Extrusion column; 212. Sliding block; 213. Intermediate rod; 22. Angle adjustment mechanism; 221. Thrust rod; 222. Swing guide plate; 223. Pin shaft; 224. Support plate; 225. Spring; 23. Sliding groove; 24. Temperature sensor; 25. Controller. Detailed implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] Please refer to the attached Figure 1 - attached Figure 11 As shown in the figure, the present invention provides a technical solution: a total heat recovery unit with a bypass pipe, including a recycling treatment box 1. The inner wall of the recycling treatment box 1 is connected with a vertical plate 2. The side surface of the vertical plate 2 is penetrated and connected with a rotary total heat exchanger 3. Partition boards 4 are connected to both the left and right side surfaces of the vertical plate 2. The right side surface of the recycling treatment box 1 is penetrated and connected with an intermediate pipe 10. The lower part of the right side surface of the vertical plate 2 is connected with an extended pipe 13. Rubber bands 15 are provided at the opposite ends of the extended pipe 13 and the intermediate pipe 10. A rubber ring 14 is connected to the opposite surfaces of the two rubber bands 15. Two fixed rods 16 are connected to the side surface of the intermediate pipe 10. The other end of the fixed rod 16 is connected with a support ring 17. A rotation control mechanism 18 is connected to the side surface of the fixed rod 16. A sliding groove 23 is opened on the side surface of the support ring 17. A sliding connection mechanism 21 is slidably connected in the sliding groove 23. A rotation ring 19 is connected to the outside of the rotation control mechanism 18. An extrusion hole 20 is opened on the side surface of the rotation ring 19. The sliding connection mechanism 21 is slidably arranged in the extrusion hole 20. Two angle adjustment mechanisms 22 arranged in the extended pipe 13 are connected to the rubber ring 14. The angle adjustment mechanism 22 is connected with the sliding connection mechanism 21.

[0022] The temperature sensor 24 can detect the temperature difference between the fresh air in the intake air passage 5 and the air on the left side of the exhaust air passage 6, and the controller 25 automatically controls the operation of the driving component 182.

[0023] The rubber ring 14 and the rubber belt 15 make the space between the middle pipe 10 and the extension pipe 13 variable, facilitating the adjustment of the space by stretching the rubber ring 14.

[0024] Specifically, as Figure 1-3 shown, the partition plate 4 divides the space inside the recycling and treatment box 1 on both sides of the partition plate 4 into an air inlet channel 5 and an exhaust channel 6. The right end of the middle pipe 10 is connected with a connector 12, and an exhaust head 9 communicated with the exhaust channel 6 is arranged on the left side surface of the recycling and treatment box 1.

[0025] Specifically, as Figure 3 shown, a fresh air inlet head 8 and a fresh air outlet head 7 are respectively communicated with the left and right sides of the recycling and treatment box 1. Both the fresh air inlet head 8 and the fresh air outlet head 7 are communicated with the air inlet channel 5, and an extension bypass pipe 11 penetrating through the front surface of the recycling and treatment box 1 is communicated with the front surface of the middle pipe 10.

[0026] In the transitional season or when heat recovery is not required, the bypass pipe can allow air to bypass the heat exchanger, reducing resistance and saving the energy consumption of the fan; or when the temperature difference between indoor and outdoor is small and the heat recovery efficiency is low, bypass can avoid energy loss.

[0027] Specifically, as Figure 3 shown, a temperature sensor 24 is connected through the partition plate 4 on the left side. The temperature sensor 24 detects the temperatures of the gas flowing out of the exhaust head 9 and the gas flowing into the fresh air inlet head 8. A controller 25 is arranged on the front surface of the recycling and treatment box 1, and the temperature sensor 24 is electrically connected with the controller 25.

[0028] Specifically, as Figure 4-6 shown, the rotation control mechanism 18 includes a cross bar 181 fixedly connected to the outside of the fixed rod 16. A driving component 182 is connected to the end of the cross bar 181. An output shaft of the driving component 182 is fixedly connected with a driving wheel 183. A connecting tooth 184 is meshed with the side surface of the driving wheel 183, and the connecting tooth 184 is arranged outside the rotating ring 19.

[0029] The extrusion holes 20 are set to be arc-shaped. Six extrusion holes 20 are arranged at equal circumferential intervals, and the positions of the six extrusion holes 20 correspond to the angular positions of the rubber ring 14 arranged in a hexagon.

[0030] The arc-shaped extrusion holes 20 cooperate with the extrusion columns 211. By using the rotating extrusion holes 20, the extrusion columns 211 can be stably pushed to move, so that the six extrusion columns 211 move synchronously. When the driving component 182 operates, it will drive the driving wheel 183 to rotate. The driving wheel 183 controls the rotation of the rotating ring 19 through the connecting tooth 184. The six extrusion columns 211 cooperate with the extrusion holes 20 to limit the rotating ring 19, ensuring that the connecting tooth 184 can stably keep in contact with the driving wheel 183.

[0031] Specifically, asFigure 7-8 and Figure 10-11 As shown in Figure 10-11 , the sliding connection mechanism 21 includes an extrusion column 211. The extrusion column 211 is cylindrical. The extrusion column 211 is slidably connected to the inner wall of the extrusion hole 20. One end of the extrusion column 211 close to the support ring 17 is connected with a sliding block 212, and the sliding block 212 is slidably connected in the sliding groove 23.

[0032] The sliding block 212 is T-shaped. One side of the extrusion column 211 close to the rubber ring 14 is connected with an intermediate rod 213. One end of the intermediate rod 213 is fixedly connected to the rubber ring 14, and the angle adjustment mechanism 22 is fixedly connected to the intermediate rod 213.

[0033] Since the extrusion column 211 is cylindrical, when the extrusion hole 20 rotates, it can smoothly and stably drive the extrusion column 211 to move. The cooperation between the sliding block 212 and the sliding groove 23 enables the extrusion column 211 to be stably guided and limited, and the extrusion column 211 moves stably when subjected to an external force.

[0034] Specifically, as shown in Figure 6-7 and Figure 9 As shown in Figure 9 , the angle adjustment mechanism 22 includes a top rod 221 fixedly connected to the intermediate rod 213. The end of the top rod 221 is slidably connected with a swing guide plate 222. The swing guide plate 222 is obliquely arranged in the extension pipe 13. A pin shaft 223 is connected through the side surface of the swing guide plate 222, and two support plates 224 are hinged outside the pin shaft 223.

[0035] The support plates 224 are fixedly connected in the extension pipe 13. A spring 225 is fixedly connected to the side surface of the swing guide plate 222, and the spring 225 is fixedly connected in the extension pipe 13.

[0036] The spring 225 can ensure that the swing guide plate 222 is in a relatively stable state when the top plate is stable. The pin shaft 223 supports the swing guide plate 222 to ensure that the swing guide plate 222 can rotate stably. The top rod 221 is controlled by the intermediate rod 213 to move away from the swing guide plate 222. At this time, the spring 225 controls the swing guide plate 222 to rotate. During the rotation of the swing guide plate 222, the flowing air will be guided, so that the contact angle between the air and the rotary total heat exchanger 3 changes.

[0037] Working principle: During use, both sides of the fresh air intake head 8 and the connector 12 are connected with fan assemblies. When the fan assemblies work, the high-temperature air in the room is introduced into the rotary total heat exchanger 3 through the connector 12, the intermediate pipe 10, and the extension pipe 13. The heat is absorbed by the rotary total heat exchanger 3. The heated part in the rotary total heat exchanger 3 will rotate into the intake passage 5 on the upper side. The gas discharged from the rotary total heat exchanger 3 enters the exhaust passage 6 on the left side. The temperatures of the air entering from the fresh air intake head 8 in the intake passage 5 and the air on the left side in the exhaust passage 6 are detected by the temperature sensor 24. When the temperature difference between the two is within a certain range, the controller 25 automatically controls the drive assembly 182 to work. When the drive assembly 182 works, it controls the connecting tooth 184 and the rotating ring 19 to rotate through the drive wheel 183; Since the sliding block 212 is guided by the sliding groove 23, and the arc-shaped extrusion hole 20 pushes the extrusion column 211 and the intermediate rod 213 to move. During the movement of the six intermediate rods 213, the rubber ring 14 will be pulled to open and become larger. While the rubber ring 14 becomes larger, it will pull the rubber belts 15 on both sides to deform, causing the space of the rubber ring 14 and the rubber belts 15 to change. The space on the right side of the exhaust passage 6 increases, and the increased space allows more air to be accommodated, reducing the air flow rate of the air flowing through the rotary total heat exchanger 3 and increasing the flow time of the air inside the rotary total heat exchanger 3. Thus, the heat of the discharged air can be absorbed more fully, and the temperature of the air entering the left half of the exhaust passage 6 is reduced; While the extrusion column 211 moves, it controls the ejector rod 221 to move away from the swing guide plate 222 through the intermediate rod 213. At this time, the spring 225 controls the swing guide plate 222 to rotate. During the rotation of the swing guide plate 222, it will guide the flowing air, causing the contact angle between the air and the rotary total heat exchanger 3 to change. The air hitting the surface of the rotary total heat exchanger 3 at different angles increases the scouring frequency and intensity of the air on the surface of the rotating wheel. The air flow can effectively cover all areas of the rotating wheel, preventing impurities from accumulating for a long time due to too single air flow direction in some places and ensuring the cleanliness of the right side surface of the rotary total heat exchanger 3.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered within the protection scope of the present invention.

Claims

1. A total heat recovery unit with a bypass pipe, comprising a recovery processing box (1), characterized in that: The inner wall of the recycling and processing box (1) is connected to a vertical plate (2), the side of the vertical plate (2) is penetrated by a rotary full heat exchanger (3), the left and right side surfaces of the vertical plate (2) are both connected to a partition plate (4), the right side surface of the recycling and processing box (1) is penetrated by an intermediate tube (10), the lower part of the right side surface of the vertical plate (2) is connected to an extension tube (13), the opposite ends of the extension tube (13) and the intermediate tube (10) are both provided with a rubber belt (15), the opposite surfaces of the two rubber belts (15) are connected to a rubber ring (14), the side surface of the intermediate tube (10) is connected to Two fixing rods (16) are connected, the other end of the fixing rod (16) is connected to a support ring (17), the side of the fixing rod (16) is connected to a rotation control mechanism (18), the side of the support ring (17) is provided with a sliding groove (23), a sliding connection mechanism (21) is slidably connected in the sliding groove (23), the rotation control mechanism (18) is externally connected to a rotating ring (19), and two angle adjustment mechanisms (22) arranged in the extension tube (13) are connected inside the rubber ring (14), and the angle adjustment mechanism (22) is connected to the sliding connection mechanism (21).

2. A total heat recovery unit with a bypass pipe according to claim 1, characterized in that: The partition (4) divides the space inside the recycling and processing box (1) located on the upper and lower sides of the partition (4) into an intake channel (5) and an exhaust channel (6); the right end of the intermediate pipe (10) is connected to a connector (12); the left side of the recycling and processing box (1) is provided with an exhaust head (9) connected to the exhaust channel (6); an extrusion hole (20) is opened on the side of the rotating ring (19); and a sliding connection mechanism (21) is slidably arranged in the extrusion hole (20).

3. A total heat recovery unit with a bypass pipe according to claim 1, characterized in that: The left and right sides of the recycling and processing box (1) are respectively connected to a fresh air inlet head (8) and a fresh air outlet head (7), and both the fresh air inlet head (8) and the fresh air outlet head (7) are connected to the air inlet channel (5). The front side of the intermediate pipe (10) is connected to an extended side pipe (11) that runs through the front side of the recycling and processing box (1).

4. A total heat recovery unit with a bypass pipe according to claim 1, characterized in that: A temperature sensor (24) is connected through the left partition (4), and the temperature sensor (24) detects the temperature of the gas flowing out of the exhaust head (9) and the gas flowing into the fresh air intake head (8). A controller (25) is provided on the front of the recovery and processing box (1), and the temperature sensor (24) is electrically connected to the controller (25).

5. A total heat recovery unit with a bypass pipe according to claim 1, characterized in that: The rotation control mechanism (18) comprises a cross bar (181) fixedly connected to the outside of the fixed rod (16); the end of the cross bar (181) is connected to a driving assembly (182); the output shaft of the driving assembly (182) is fixedly connected to a driving wheel (183); the side surface of the driving wheel (183) is meshed with connecting teeth (184); and the connecting teeth (184) are arranged outside the rotating ring (19).

6. A total heat recovery unit with a bypass pipe according to claim 2, characterized in that: The extrusion holes (20) are arranged in an arc shape, and the six extrusion holes (20) are arranged equidistantly around the circumference, and the positions of the six extrusion holes (20) correspond to the corner positions of the rubber ring (14) arranged in a hexagonal shape.

7. A total heat recovery unit with a bypass pipe according to claim 6, characterized in that: The sliding connection mechanism (21) comprises an extrusion column (211) which is cylindrical and slidably connected to the inner wall of the extrusion hole (20); one end of the extrusion column (211) close to the support ring (17) is connected to a sliding block (212); and the sliding block (212) is slidably connected in the sliding groove (23).

8. A total heat recovery unit with a bypass pipe according to claim 7, characterized in that: The sliding block (212) is configured in a T-shape, a side of the extrusion column (211) close to the rubber ring (14) is connected to an intermediate rod (213), one end of the intermediate rod (213) is fixedly connected to the rubber ring (14), and the angle adjustment mechanism (22) is fixedly connected to the intermediate rod (213).

9. A total heat recovery unit with a bypass pipe according to claim 8, characterized in that: The angle adjustment mechanism (22) comprises a push rod (221) fixedly connected to the middle rod (213); the end of the push rod (221) is slidably connected to a swing guide plate (222); the swing guide plate (222) is tiltedly arranged in the extension tube (13); a pin shaft (223) is passed through the side surface of the swing guide plate (222); and two support plates (224) are hingedly connected to the outside of the pin shaft (223).

10. A total heat recovery unit with a bypass pipe according to claim 9, characterized in that: The support plate (224) is fixedly connected in the extension tube (13); a spring (225) is fixedly connected to the side surface of the swing guide plate (222); and the spring (225) is fixedly connected in the extension tube (13).

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