Energy-saving fan unit for air conditioning ventilation system

Abstract

The invention relates to an energy-saving fan unit for an air conditioning ventilation system. The energy-saving fan unit comprises an air conditioner outer plate, a ventilation pipeline, an air volume adjusting valve and a sealing mechanism, the air volume adjusting valve comprises a valve body, a valve clack and a valve driving mechanism, a first mounting hole is formed in the inner wall of the valve body, the valve clack is provided with a first blade shaft, and the first blade shaft is in pivot joint with the first mounting hole; the sealing mechanism comprises a mounting cavity, a sealing plate and an energy converter, the sealing plate is arranged on the valve body, the first blade shaft is provided with an annular groove, a second sliding block is arranged on the sealing plate, one end of the energy converter is arranged in the mounting cavity, and the other end of the energy converter penetrates through a fifth mounting hole to be connected with the sealing plate. And the energy converter is used for converting energy generated by gas leakage to drive the second sliding block to abut against the annular groove so as to block the annular gap, so that gas leakage between the valve clack and the outer frame is reduced, the air pressure of the ventilation pipeline is maintained, the air volume is stabilized, and fan energy is saved.

Description

Technical Field

[0001] The invention relates to the technical field of energy-saving fan units, and in particular to an energy-saving fan unit for an air-conditioning and ventilation system. Background Art

[0002] Air conditioning and ventilation systems are widely used in modern buildings. The fan unit is the core part of the system, which mainly includes fans, ventilation ducts, and air volume control valves located in the ventilation ducts. The fan provides power for the flow of air in the ventilation ducts, while the air volume control valve is responsible for accurately adjusting the air volume and air pressure to meet different ventilation needs.

[0003] In actual use, the connection method between the fan regulating valve and its drive mechanism often brings the risk of air leakage, which affects the ventilation efficiency. On the one hand, leakage will cause the pipeline air pressure to decrease, destroying the originally stable air pressure balance. In order to maintain the air volume and air pressure required by the air conditioning and ventilation system, the fan has to increase the speed or increase the power, thereby consuming more electricity. On the other hand, air continues to escape from the leak, so that the fan needs to spend more time to complete the established air conditioning and ventilation tasks, which not only reduces the ventilation efficiency, but also causes the fan to operate at high load for a long time.

[0004] The sealing means in the prior art are mainly carried out around the blades and between the blades and the outer frame of the air valve. By setting a flexible seal, the air leakage before and after the blades is reduced to a certain extent. However, this method ignores the sealing problem between the outer frame of the air volume regulating valve and the outside of the pipeline, especially the gap between the blade shaft and the sleeve, and between the sleeve and the outer frame. These parts are very prone to air leakage during the operation of the fan, resulting in unstable air volume and energy waste. It cannot meet the strict requirements of modern air conditioning and ventilation systems for high efficiency, energy saving and precise control. Therefore, it is urgent to develop an energy-saving fan unit for air conditioning and ventilation systems that can more effectively reduce gas leakage. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an energy-saving fan unit for an air-conditioning and ventilation system, which can reduce the gas leakage between the blade shaft of the valve disc and the outer frame to maintain the air pressure in the ventilation duct, stabilize the air volume, reduce the operation of the fan to maintain stable wind pressure, reduce energy consumption, and improve energy utilization efficiency.

[0006] The purpose of the present invention is achieved by the following scheme:

[0007] Energy-saving fan units for air conditioning and ventilation systems, including:

[0008] The air conditioner fan comprises an air inlet, a drive motor, fan blades and an air outlet, the drive motor is drivingly connected to the fan blades, and the air inlet and the air outlet are sequentially connected along the blowing direction of the fan blades;

[0009] The ventilation duct comprises a plurality of pipe sections connected in sequence, wherein one of the pipe sections is connected to the air outlet;

[0010] The air volume regulating valve is located between two pipe sections, wherein one pipe section, the air volume regulating valve and the other pipe section are connected in sequence, the air volume regulating valve comprises a valve body, at least one valve flap and a valve driving mechanism, the inner wall of the valve body is provided with a first mounting hole, the valve flap is provided with a first blade shaft, and the first blade shaft is pivotally connected to the first mounting hole; the valve driving mechanism is installed on the valve body and is drivingly connected to the plurality of first blade shafts, and the valve driving mechanism is used to drive the valve flap to rotate;

[0011] At least one sealing mechanism, the sealing mechanism includes an installation cavity, a sealing plate and an energy converter, the installation cavity is provided with a fifth installation hole connected to the inner wall of the valve body, the sealing plate is arranged on the valve body, the sealing plate is provided with an avoidance hole, the first blade shaft is sequentially penetrated through the avoidance hole and the first installation hole along the gas leakage direction; the first blade shaft is provided with an annular groove, the sealing plate is provided with an annular sealing block, and the annular sealing block is embedded in the annular groove; one end of the energy converter is arranged in the installation cavity, and the other end of the energy converter passes through the fifth installation hole to the outside of the installation cavity and is connected to the sealing plate, the energy converter is used for converting the energy generated by the gas leakage to drive the annular sealing block of the sealing plate to squeeze the side wall of the annular groove to seal the annular gap.

[0012] In one embodiment, the energy converter includes a piston and a piston push rod;

[0013] The piston is installed in the installation cavity and divides the installation cavity into a constant pressure cavity and a variable pressure cavity which are isolated from each other. The constant pressure cavity is connected with the outside, and the variable pressure cavity is connected with the inside of the valve body through the fifth installation. One end of the piston push rod is arranged on the piston, and the other end of the piston push rod passes through the fifth installation hole and is connected with the sealing plate.

[0014] When gas leaks, the variable pressure chamber is used to accommodate the leaked gas to drive the piston to move in the direction of compressing the constant pressure chamber.

[0015] In one of the embodiments, a second elastic gasket is installed on a side of the sealing plate that contacts the installation cavity.

[0016] In one embodiment, a first sealing cavity is formed on the inner wall of the valve body; a plurality of first mounting holes are formed on the valve body, the first mounting holes are communicated with the first sealing cavity, a plurality of valve flaps are provided, each valve flap is provided with at least one first blade shaft, and the plurality of first blade shafts are pivotally connected to the plurality of first mounting holes in a one-to-one correspondence;

[0017] The first sealed cavity is provided with multiple first partitions stacked in sequence, each first partition is provided with a channel opening, and the channel openings on different first partitions are staggered in sequence along the stacking direction of the multiple first partitions.

[0018] In one embodiment, the inner wall of the valve body is further provided with a second sealing cavity, and the first sealing cavity (420) and the second sealing cavity are respectively provided on opposite sides of the valve body;

[0019] The second sealing cavity is provided with a plurality of second mounting holes, the second mounting holes are communicated with the second sealing cavity, each valve flap is provided with at least one second blade shaft, and the plurality of second blade shafts are pivotally connected to the plurality of second mounting holes in a one-to-one correspondence;

[0020] A plurality of sleeves are provided in the second sealing cavity, the end of the second blade shaft is located in the sleeve, and one end of the sleeve away from the second blade shaft is sealed with a blocking cover.

[0021] In one of the embodiments, a third mounting hole is formed on the outer wall of the valve body, and the third mounting hole is coaxially arranged with one of the first mounting holes;

[0022] The valve drive mechanism is located outside the valve body, and has a first output end, wherein an end of a first blade shaft passes through the third mounting hole from the first sealing cavity to the valve body and is drivingly connected to the first output end;

[0023] The first blade shaft connected to the first output end is connected to a first transmission mechanism, which includes a first synchronous belt and at least one first driven wheel. The first synchronous belt is arranged in the first sealed cavity, and the first synchronous belt is wound around at least one first driven wheel. Each first driven wheel is linked and connected to one of the first blade shafts in a one-to-one correspondence.

[0024] In one of the embodiments, a plurality of fourth mounting holes are opened on the outer wall of the valve body, and the plurality of fourth mounting holes are respectively coaxially arranged with the plurality of first mounting holes, and the ends of the plurality of first blade shafts pass through the fourth mounting holes from the first sealing cavity to the outside of the valve body, and a second partition is provided between two adjacent first blade shafts; the plurality of second partitions divide the first sealing cavity into a plurality of third sealing cavities that are independent and isolated from each other, and the plurality of first blade shafts are correspondingly passed through one of the third sealing cavities;

[0025] The valve drive mechanism has a second output end, which is drivingly connected to the end of one of the first blade shafts. The first blade shaft connected to the second output end is connected to a second transmission mechanism. The second transmission mechanism includes a second synchronous belt and at least one second driven wheel. The second synchronous belt is arranged outside the valve body, and the second synchronous belt is wound around at least one second driven wheel. Each second driven wheel is linked and connected to one of the first blade shafts in a one-to-one corresponding manner.

[0026] In one of the embodiments, a plurality of guide grooves are formed on the inner wall of the ventilation duct, and the plurality of guide grooves are arranged in sequence along the gas flow direction.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The installation cavity, the sealing plate and the energy converter are matched so that when gas leaks, the gas enters the installation cavity and changes its pressure. The generated pressure is converted by the energy converter into power to pull the sealing plate close to the installation cavity, thereby tightening the sealing plate so that the annular sealing block and the annular groove abut against each other, thereby filling the gap between the valve disc and the valve body, ingeniously converting the unfavorable factor of gas leakage into sealing power, and enhancing the sealing effect without an additional power source, effectively reducing the amount of gas leakage, making the ventilation system run more efficiently and stably, reducing the fan load, and thus reducing energy consumption, significantly improving the energy-saving effect of the entire air-conditioning ventilation system;

[0029] 2. The piston mechanism is used as the energy converter. When the gas leaks, the gas enters the installation cavity to increase the pressure of the variable pressure cavity. In the process of squeezing the constant pressure cavity, the piston moves to tighten the sealing plate through the piston rod connected to it, thereby completing the filling of the annular gap.

[0030] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a first embodiment of an energy-saving fan unit for an air conditioning and ventilation system in the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure of the air conditioning fan in the energy-saving fan unit provided;

[0033] Figure 3a for Figure 1 A schematic diagram of the structure of the air volume regulating valve in the energy-saving fan unit provided;

[0034] Figure 3b for Figure 3a A schematic diagram of the structure behind the hidden disc in the air volume control valve provided;

[0035] Figure 4 It is a cross-sectional view of the air volume regulating valve in the second embodiment and the third embodiment of the energy-saving fan unit for the air conditioning and ventilation system of the present invention, in which the valve flap is hidden;

[0036] Figure 5 It is a cross-sectional view of the air volume regulating valve in the fourth embodiment of the energy-saving fan unit for air conditioning and ventilation system of the present invention, in which the valve disc is hidden;

[0037] Figure 6a It is a structural schematic diagram of a valve flap and a locking structure in a fifth embodiment of an energy-saving fan unit for an air conditioning and ventilation system in the present invention;

[0038] Figure 6b for Figure 6a A schematic diagram of the structure of the locking mechanism provided, in which the driving ring of the locking mechanism is hidden;

[0039] Figure 6c for Figure 6b A schematic diagram of the structure of the driving ring in the provided locking mechanism;

[0040] Figure 6d for Figure 6a a cross-sectional view of the provided locking mechanism;

[0041] Figure 6e It is a cross-sectional view of the air volume control valve in the fifth embodiment of the energy-saving fan unit for air conditioning and ventilation system of the present invention, in which the valve disc is hidden;

[0042] Figure 6f for Figure 6e A partial cross-sectional view of the air volume control valve;

[0043] Figure 7 A cross-sectional view of an air volume control valve in a sixth embodiment of an energy-saving fan unit for an air conditioning and ventilation system provided by the present invention, wherein the valve flap is hidden;

[0044] In the figure: 100, air conditioning fan; 110, air inlet; 120, drive motor; 130, fan blade; 140, air outlet; 200, ventilation duct; 300, air volume regulating valve; 400, valve body; 410, first sealed cavity; 411, first mounting hole; 412, first partition; 413, channel opening; 414, third mounting hole; 415, fourth mounting hole; 416, second partition; 417, third sealed cavity; 420, second sealed cavity; 421, second mounting hole; 422, sleeve; 423, blocking cover; 500, valve disc; 510, first blade shaft; 511, annular groove; 520, second blade shaft; 530, sleeve; 600, valve drive mechanism; 610, first output end; 611, first transmission mechanism; 612, first synchronization Belt; 613, first driven wheel; 620, second output end; 621, second transmission mechanism; 622, second synchronous belt; 623, second driven wheel; 700, sealing mechanism; 711, first sealing ring; 712, second sealing ring; 713, first connecting tube; 721, third sealing ring; 722, second connecting tube; 730, locking mechanism; 731, driving ring; 732, fixed ring stage; 733, first slider; 734, locking block; 735, driving rod; 736, sliding cavity; 737, sliding groove; 738, guide groove; 739, linkage abutment block; 741, mounting cavity; 742, piston; 743, sealing plate; 744, piston push rod; 745, fifth mounting hole; 746, annular sealing block; 747, constant pressure cavity; 748, variable pressure cavity. DETAILED DESCRIPTION

[0045] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the invention more thorough and comprehensive.

[0046] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "parallel", "first", "second", "third" and similar expressions used herein are for illustrative purposes only.

[0047] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] First embodiment:

[0049] See also Figure 1 and Figure 2 The energy-saving fan unit for an air-conditioning and ventilation system provided in the first embodiment of the present invention includes an air-conditioning fan 100, a ventilation duct 200, an air volume regulating valve 300 and at least one sealing mechanism 700.

[0050] See also Figure 2 The air conditioning fan 100 has an air inlet 110, a driving motor 120, a fan blade 130 and an air outlet 140. The driving motor 120 is drivingly connected to the fan blade 130. The air inlet 110 and the air outlet 140 are sequentially connected along the blowing direction of the fan blade 130. When the air conditioning fan 100 is working, the driving motor 120 starts and drives the fan blade 130 to rotate at a high speed. The rotating blades reduce the air pressure at the air inlet 110, and the outside air is sucked in under the action of the air pressure difference. The air obtains kinetic energy as the blades rotate and accelerates to flow toward the air outlet 140. Preferably, the air conditioning fan 100 can be a centrifugal fan or an axial flow fan.

[0051] The ventilation duct 200 includes a plurality of pipe sections connected in sequence, wherein one pipe section is connected to the air outlet 140; the air volume regulating valve 300 is located between two pipe sections, wherein one pipe section, the air volume regulating valve 300 and another pipe section are connected in sequence; specifically, Figure 3a and Figure 3b As shown, the air volume regulating valve 300 includes a valve body 400, at least one valve flap 500 and a valve driving mechanism 600. The inner wall of the valve body 400 is provided with a first mounting hole 411. The valve flap 500 is provided with a first blade shaft 510. The first blade shaft 510 is pivotally connected to the first mounting hole 411. An annular gap is formed between the first blade shaft 510 and the inner side wall of the first mounting hole 411. The valve driving mechanism 600 is installed on the valve body 400 and is drivingly connected to the plurality of first blade shafts 510. The valve driving mechanism 600 is used to drive the valve flap 500 to rotate.

[0052] It is understandable that the connection between the valve flap 500 and the valve body 400 can be a single-axis connection or a double-axis connection. When a single-axis connection is adopted, the valve flap 500 is pivotally connected to the first mounting hole 411 of the valve body 400 only through a first blade shaft 510. This connection method has a relatively simple structure, so that the valve flap 500 can rotate around a single axis. Under the action of the valve drive mechanism 600, by changing the rotation angle of the valve flap 500, the effective adjustment of the air volume in the ventilation duct 200 can be achieved. At the same time, in the single-axis connection, there is only an annular gap between the valve flap 500 and the valve body 400 at the connection between the first blade shaft 510 and the valve body 400, and the gas leakage is less. When a double-axis connection is adopted, the synergistic effect of the two shafts makes the valve flap 500 more stable during the rotation process, and it is not easy to shake or deviate. In large-scale air-conditioning systems or complex ventilation networks with high requirements for air volume adjustment accuracy, double-axis connections can better cope with various working conditions. When the valve drive mechanism 600 drives the valve flap 500 to rotate, the double shafts can evenly share the force, ensuring that the rotation angle of the valve flap 500 is accurate, thereby achieving more precise control of the air volume to meet the ventilation volume requirements of different areas and different time periods, ensuring the efficient and stable operation of the entire air-conditioning and ventilation system, and creating more comfortable and suitable air circulation conditions for the indoor environment.

[0053] like Figure 3b As shown, the energy-saving fan unit in this embodiment includes at least one sealing mechanism 700, and the sealing mechanism 700 is arranged on the valve body 400. The sealing mechanism 700 is installed in the annular gap at the connection between the first blade shaft 510 and the valve body 400 to seal the annular gap.

[0054] When the energy-saving fan unit provided by the first embodiment of the present invention is working, the air conditioner fan 100 drives the fan blade 130 to rotate when the driving motor 120 drives the fan blade 130 to cause air to be sucked in from the air inlet 110 and discharged into the ventilation duct 200 through the air outlet 140. The valve driving mechanism 600 drives the first blade shaft 510 of the valve flap 500 to rotate at the first mounting hole 411 of the valve body 400, thereby changing the opening of the valve flap 500 to adjust the ventilation volume. When the valve flap 500 rotates, since there is an annular gap at the connection between the first blade shaft 510 and the valve body 400, the sealing mechanism 700 can fit closely at the gap, thereby filling the annular gap and effectively preventing air from leaking from the gap.

[0055] The annular gap between the first blade shaft 510 and the valve body 400 is effectively sealed by the sealing mechanism 700. On the one hand, it helps to save energy and reduce the energy loss caused by air leakage, so that the air-conditioning fan 100 does not need to do additional work to make up for the leaked air volume, thereby reducing power consumption. In addition, since air leakage is prevented from eroding the inside of the equipment and affecting pressure instability, the wear of components such as the valve body 400 and the valve flap 500 due to air flow impact and corrosion is reduced, the failure rate of the equipment is reduced, the maintenance and replacement costs are reduced, and the long-term stable operation of the air-conditioning and ventilation system is ensured. On the other hand, the interference of air leakage on the air volume is avoided, so that the air volume regulating valve 300 can control the air volume more accurately according to the set value. Whether in cooling, heating or ventilation mode, it can ensure that each area of ​​the room obtains accurate air volume distribution, thereby improving the comfort of the indoor environment.

[0056] Among them, the inner wall of the ventilation duct 200 is provided with a plurality of guide grooves, and the plurality of guide grooves are arranged in sequence along the gas flow direction. When the gas flows in the ventilation duct 200, it will travel along the path set by the guide groove. After the gas enters the guide groove, the original flow state will be changed due to the boundary constraints of the groove. On the one hand, it can effectively improve the airflow pattern, reduce turbulence and vortex, reduce airflow resistance, make ventilation smoother and more efficient, increase ventilation volume under the same power, reduce fan energy consumption, and achieve energy saving. On the other hand, it can greatly reduce the noise caused by turbulence, create a quiet and comfortable environment indoors, such as reducing noise interference in the office area, and improving staff work efficiency and comfort.

[0057] It should also be noted that there are multiple air volume regulating valves 300, and the multiple air volume regulating valves 300 are arranged in parallel, and each air volume regulating valve 300 controls the opening and closing of the cold air or hot air in one of the rooms. When one of the parallel air volume regulating valves 300 is opened and the other air volume regulating valve 300 is closed, the leakage of the closed air volume regulating valve 300 is very small, so the cold air or hot air will not flow in the direction of the closed air volume regulating valve 300, which is more energy-saving.

[0058] Second embodiment:

[0059] See also Figure 4 The second embodiment includes the first embodiment, and is different from the first embodiment in that:

[0060] A first sealing cavity 410 is formed on the inner wall of the valve body 400; a plurality of first mounting holes 411 are formed on the valve body 400, the first mounting holes 411 are communicated with the first sealing cavity 410, a plurality of valve flaps 500 are provided, each valve flap 500 is provided with at least one first blade shaft 510, and the plurality of first blade shafts 510 are pivotally connected to the plurality of first mounting holes 411 in a one-to-one correspondence; a plurality of first partitions 412 stacked in sequence are provided in the first sealing cavity 410, each first partition 412 is provided with a channel opening 413, and the channel openings 413 on different first partitions 412 are staggered in sequence along the stacking direction of the plurality of first partitions 412.

[0061] Specifically, in the first sealing cavity 410, since the channel openings 413 on each layer of the first partition plates 412 are staggered in sequence along the stacking direction, after the air leaks into the first sealing cavity 410 from the annular gap between the first blade shaft 510 and the first mounting hole 411, it needs to flow in a circuitous manner between the layers of partition plates before it can leak out of the valve body 400. This complex path greatly increases the resistance to air leakage, making it difficult for the air to break through the layers of barriers and eventually leak out, further reducing the possibility of gas leaking to the outside of the valve body 400 through the first blade shaft 510. A labyrinth seal is formed through the multi-layer partition plate structure of the first sealing cavity 410. Compared with traditional simple sealing methods, it can effectively deal with air leakage under different pressures and maintain good sealing even when the system pressure fluctuates greatly.

[0062] Preferably, based on the fact that the connection between the valve body 400 and the valve flap 500 is a double-axis connection, a second sealing cavity 420 is further provided on the inner wall of the valve body 400; the first sealing cavity 410 and the second sealing cavity 420 are respectively arranged on opposite sides of the valve body 400; the second sealing cavity 420 is provided with a plurality of second mounting holes 421, and the second mounting holes 421 are connected to the second sealing cavity 420, and each valve flap 500 is provided with at least one second blade shaft 520, and the plurality of second blade shafts 520 are pivotally connected to the plurality of second mounting holes 421 in a one-to-one correspondence; a plurality of sleeves 422 are provided in the second sealing cavity 420, and the end of the second blade shaft 520 is located in the sleeve 422, and the end of the sleeve 422 away from the second blade shaft 520 is sealed with a blocking cover 423.

[0063] Specifically, in the second sealed cavity 420, when air tries to leak from the annular gap between the second blade shaft 520 and the second mounting hole 421, it will be blocked by the sleeve 422 and the sealing cover 423 and can only gather in the limited space in the sleeve 422, making it difficult to form a continuous leakage airflow.

[0064] The multi-layer partition structure of the first sealing cavity 410 forms a labyrinth seal, which can effectively deal with air leakage under different pressures compared to the traditional simple sealing method, and can maintain good sealing even when the system pressure fluctuates greatly. The combination of the sleeve 422 and the plugging cover 423 of the second sealing cavity 420 provides a reliable sealing guarantee for the second blade shaft 520, reducing the risk of leakage on this side, further ensuring that the air volume regulating valve 300 can accurately control the air volume, reducing the energy loss caused by leakage, improving the energy utilization efficiency of the air conditioning system, reducing the operating cost, and extending the service life of the equipment, because the stable operating environment reduces the erosion and wear of the valve body 400, valve disc 500 and other components due to abnormal airflow.

[0065] It should also be noted that when the connection between the valve body 400 and the valve flap 500 is a single-axis connection, the inner wall of the valve body 400 can only open a first sealing cavity 410 and a sealing mechanism 700 located at the first mounting hole 411 to prevent gas leakage. At this time, since the other side is only in contact with the valve body 400 but not connected, this side does not need to adopt special sealing measures.

[0066] Third embodiment:

[0067] See also Figure 4 The third embodiment includes the second embodiment, and is different from the second embodiment in that:

[0068] Preferably, a third mounting hole 414 is formed on the outer wall of the valve body 400, and the third mounting hole 414 is coaxially arranged with one of the first mounting holes 411; the valve driving mechanism 600 is located outside the valve body 400, and the valve driving mechanism 600 has a first output end 610, wherein an end of a first blade shaft 510 passes through the third mounting hole 414 from the first sealing cavity 410 to the outside of the valve body 400 and is drivingly connected to the first output end 610; the first blade shaft 510 connected to the first output end 610 is connected to the first transmission mechanism 611, and the first transmission mechanism 611 includes a first A synchronous belt 612 and at least one first driven wheel 613, the first synchronous belt 612 is arranged in the first sealing cavity 410, and the first synchronous belt 612 is wound around at least one first driven wheel 613, each first driven wheel 613 is linked and connected with one of the first blade shafts 510 in a one-to-one correspondence. Preferably, the valve drive mechanism 600 can be an automated drive such as an electric drive mechanism, a pneumatic drive mechanism or a hydraulic drive mechanism, or it can be a manual drive mechanism that relies on human operation, for example, by turning a handwheel or a handle to transmit torque to the valve stem of the valve to open or close the valve.

[0069] Specifically, the valve drive mechanism 600 can transmit power to each valve flap 500 more efficiently. The setting of the first transmission mechanism 611, through the cooperation of the first synchronous belt 612 and the first driven wheel 613, can reduce energy loss and mechanical wear while ensuring power transmission. Compared with other complex transmission methods, the synchronous belt drive has the characteristics of stability and low noise, making the air volume control valve 300 quieter during operation and reducing noise interference to the surrounding environment. In terms of the accuracy of air volume adjustment, since all the first blade shafts 510 can achieve synchronous rotation through the first transmission mechanism 611, the opening of the valve flap 500 can be accurately controlled, thereby ensuring that the ventilation system can be accurately adjusted according to the set air volume requirements, thereby improving the comfort control level of the indoor environment. It can be understood that the transmission method of the first transmission mechanism 611 can also be chain drive, gear drive or worm drive.

[0070] Fourth embodiment:

[0071] See also Figure 5 The fourth embodiment includes the second embodiment, and is different from the second embodiment in that:

[0072] Preferably, a plurality of fourth mounting holes 415 are provided on the outer wall of the valve body 400, and the plurality of fourth mounting holes 415 are respectively coaxially arranged with the plurality of first mounting holes 411, and the ends of the plurality of first blade shafts 510 pass through the fourth mounting holes 415 from the first sealing cavity 410 to the outside of the valve body 400, and a second partition plate 416 is provided between two adjacent first blade shafts 510; the plurality of second partition plates 416 divide the first sealing cavity 410 into a plurality of third sealing cavities 417 that are independent and isolated from each other, and the plurality of first blade shafts 510 are correspondingly passed through one of the third sealing cavities 417.

[0073] Specifically, when the first blade shafts 510 of all valve flaps 500 are sealed in a first sealed cavity 410, the flow of gas in the cavity is relatively complex and interferes with each other. Once the connection of a valve flap 500 is not sealed well, the leaked gas may run around in the first sealed cavity 410, changing the air pressure distribution in the cavity, thereby affecting the sealing effect of other valve flaps 500, resulting in more gas leakage, making the gas flow control of the entire air volume control valve 300 unstable and unpredictable.

[0074] The mutual influence between the valve flaps 500 is avoided by designing the independent third sealed chambers 417. Each third sealed chamber 417 is connected to only one valve flap 500, and the flow of gas in each third sealed chamber 417 is relatively independent. When a valve flap 500 has a slight leak, the leaked gas is confined to the corresponding third sealed chamber 417, and will not interfere with the airflow state of the third sealed chamber 417 where other valve flaps 500 are located. This makes the flow of gas in the entire air volume control valve 300 more orderly, and each valve flap 500 can more accurately adjust the ventilation area according to demand and stably control the gas flow. For example, when the air conditioning and ventilation system is in variable air volume operation, each independent third sealed chamber 417 can ensure the stability of gas flow when the valve flap 500 is in motion, reduce the air volume fluctuation caused by the mutual influence of the sealed chambers, and improve the accuracy and stability of the system's control of the indoor air environment.

[0075] Correspondingly, since each valve flap 500 is in a different chamber, the first transmission mechanism 611 of the valve is not suitable for the joint transmission with multiple first blade shafts 510 in this embodiment. Preferably, the valve driving mechanism 600 has a second output end 620, and the second output end 620 is drivingly connected to the end of one of the first blade shafts 510, and the first blade shaft 510 connected to the second output end 620 is connected to a second transmission mechanism 621, and the second transmission mechanism 621 includes a second synchronous belt 622 and a plurality of at least one driven wheel 623, and the second synchronous belt 622 is arranged outside the valve body 400, and the second synchronous belt 622 is wound around at least one second driven wheel 623, and each second driven wheel 623 is linked and connected to one of the first blade shafts 510 in a one-to-one corresponding manner. It can be understood that the transmission mode of the second transmission mechanism 621 can also be chain drive, gear drive or worm gear drive.

[0076] Fifth embodiment:

[0077] The fifth embodiment includes the second embodiment, and is different from the second embodiment in that:

[0078] Preferably, if Figure 4 As shown, the sealing mechanism 700 includes a first sealing ring 711, a second sealing ring 712 and a first connecting tube 713. The first sealing ring 711 and the second sealing ring 712 are respectively located on opposite sides of the first mounting hole 411. The first sealing ring 711, the first connecting tube 713 and the second sealing ring 712 are sequentially connected along the axial direction of the first blade shaft 510. Preferably, the first sealing ring 711 and the second sealing ring 712 can be made of special wear-resistant and corrosion-resistant materials to increase the service life.

[0079] Specifically, when the valve is in working state, the first sealing ring 711 and the second sealing ring 712 at both ends of the first connecting tube 713 seal the first mounting hole 411 from opposite sides thereof, so as to avoid the fan from doing extra work to compensate for the pressure loss due to gas leakage. Thus, the energy consumption of the fan is reduced. At the same time, the stable sealing state can keep the fan running efficiently, reduce the efficiency fluctuation caused by leakage, further promote the rational use of energy, reduce the operating cost, and save a lot of energy expenses on air conditioning and ventilation for enterprises or families in the long-term operation process, improve the overall economic benefits, and also help promote the energy-saving application and sustainable development of fans in industrial production and other fields.

[0080] Sixth embodiment:

[0081] The sixth embodiment includes the second embodiment, and is different from the second embodiment in that:

[0082] Preferably, if Figures 6a to 6e As shown, the sealing mechanism 700 includes a third sealing ring 721, a second connecting tube 722 and a locking mechanism 730. The third sealing ring 721 and the locking mechanism 730 are respectively located on opposite sides of the first mounting hole 411 and the locking mechanism 730 is located in the first sealing cavity 410. The third sealing ring 721 and the locking mechanism 730 are connected through the second connecting tube 722. Preferably, the third sealing ring 721 can be made of a special wear-resistant and corrosion-resistant material to reduce the wear, erosion and consumption generated during use and increase the service life of the equipment.

[0083] The locking mechanism 730 includes a driving ring 731, a fixed ring platform 732, a first slider 733, a locking block 734 and a driving rod 735;

[0084] like Figure 6a and Figure 6b As shown, the fixed circular ring stage 732 is embedded in the first sealing cavity 410 and is coaxially arranged with the first mounting hole 411. A plurality of sliding cavities 736 and a plurality of sliding grooves 737 are provided in the fixed circular ring stage 732. The plurality of sliding cavities 736 are all connected to the side wall of the fixed circular ring stage 732. The sliding grooves 737 are located on the side of the fixed circular ring stage 732 away from the first mounting hole 411, and each sliding groove 737 is connected to one of the sliding cavities 736. Figure 6cAs shown, the driving ring 731 is fixed to the first blade shaft 510 and is coaxially arranged with the first blade shaft 510. The driving ring 731 is provided with a guide groove 738. The guide groove 738 is slidably connected to one end of the driving rod 735. The other end of the driving rod 735 is linked to the first slider 733 and slidably connected to the sliding groove 737. The first slider 733 is arranged in the sliding cavity 736. The side of the sliding cavity 736 close to the axis of the fixed circular ring stage 732 is connected to the first slider through an elastic element to reset the first slider 733. The locking block 737 is locked. 34 is arranged on the side of the first slider 733 away from the axis of the fixed circular ring stage 732; the locking block 734 is used to lock the first blade shaft 510 to block the annular gap. Preferably, the guide groove 738 has a first guide channel and a second guide channel that can limit the driving rod 735 in both clockwise and counterclockwise rotation. Both guide channels can drive the driving rod 735 to move to the side away from the axial direction of the fixed circular ring stage 732; preferably, the elastic element can be an element with elastic properties such as a spring, a torsion spring or a rubber elastomer.

[0085] When the valve starts to work and needs to be opened or the opening degree is adjusted, the first blade shaft 510 rotates under the drive of the valve driving mechanism 600, and the driving ring 731 connected thereto rotates synchronously. As the driving ring 731 rotates, the driving rod 735 produces a displacement in a specific direction under the trajectory restriction of the guide groove 738, so that the first slider 733 is subjected to an outward thrust, overcomes the elastic force of the elastic element and moves in a direction away from the axis of the fixed annular platform 732, and then drives the locking block 734 installed on the first slider 733 to move outward, thereby releasing the lock on the first blade shaft 510. At this time, the first blade shaft 510 can rotate freely to realize the opening or opening degree adjustment operation of the valve.

[0086] After the adjustment of the valve is completed, the valve drive mechanism 600 controls the first blade shaft 510 to reverse. During the reversal process, the driving ring 731 also rotates in the opposite direction, and the driving rod 735 moves in the opposite direction under the constraint of the guide groove 738. At the same time, the restoring force generated by the elastic element due to the previous compression also pushes the first slider 733. Under the combined action of the constraint of the guide groove 738 and the elastic force of the elastic element, the first slider 733 moves toward the axis of the fixed annular platform 732, driving the locking block 734 on the first slider 733 to move closer to the middle, re-tightly locking the first blade shaft 510, and restoring the valve to a sealed state. Through the cooperation of the locking mechanism 730 and the first blade shaft 510, the air volume control valve can automatically realize the locking and unlocking functions during the operation process, which not only ensures the convenience and flexibility of the valve operation, but also ensures the sealing reliability of the valve under different working conditions, effectively preventing air leakage, which is of great significance for improving the overall performance and service life of the valve, and also helps to maintain the stable operation of the entire fluid system connected thereto, and reduce the energy loss and production accident risks caused by valve sealing problems.

[0087] Similarly, in order to ensure that the locking mechanism 730 can effectively lock the first blade shaft 510 when the valve flap 500 rotates to different positions, a bushing 530 is provided on the valve flap 500. Preferably, the bushing 530 is made of a material with a low friction coefficient and is lined with a wear-resistant bearing structure to ensure the flexibility and stability of the first blade shaft 510 when rotating therein. The first blade shaft 510 is rotatably connected to the bushing 530. A linkage abutment block 739 is provided at one end of the first blade shaft 510 away from the valve body 400. When the air volume control valve controls the air volume or closes the valve, the linkage abutment block 739 is used to abut the valve flap 500.

[0088] Specifically, when the valve starts to move, the first blade shaft 510 rotates. Within a certain angle range of initial rotation, since the linkage abutment block 739 has not yet abutted against the valve disc 500, the rotation of the first blade shaft 510 mainly acts on the locking mechanism 730. Its rotation process is similar to cam drive, and the locking mechanism 730 is driven to perform locking or unlocking operations through specific structural profile changes. When the driving ring 731 in the locking mechanism 730 rotates with the first blade shaft 510, the driving rod 735 moves under the constraint of the guide groove 738, driving the first slider 733 to overcome the elastic force of the elastic element or move under the action of the elastic force, so that the locking block 734 can lock or unlock the first blade shaft 510. As the first blade shaft 510 continues to rotate, the linkage abutment block 739 gradually abuts against the valve disc 500. At this time, the locking mechanism 730 and the valve disc 500 begin to work together. After rotating to a specific angle, the driving rod 735 is separated from the guide groove 738. Since it is separated from the constraint of the guide groove 738, the locking mechanism 730 is no longer affected by the outward dispersion of the driving rod 735, and maintains stable operation in the current state. When it is necessary to reverse the first blade shaft 510, for example, to reversely adjust the valve opening or close the valve, the driving rod 735 re-enters the guide groove 738 under the action of the restoring force of the elastic component. With the reversal of the first blade shaft 510, the driving rod 735 gradually moves in the guide groove 738, driving the locking block 734 on the first slider 733 to move toward the direction close to the first blade shaft 510, thereby gradually locking the first blade shaft 510. In this process, since the linkage abutment block 739 is converted from abutting at one end of the valve disc 500 to abutting at the other end, the position of the valve disc 500 is relatively stable, which does not affect the air volume adjustment of the valve body 400, and the entire valve system can smoothly complete the switching and adjustment of the working state.

[0089] Among them, a first elastic gasket is installed on one side of the locking block 734 for contacting the first blade shaft 510. Preferably, the first elastic gasket can be a rubber elastic gasket, a polytetrafluoroethylene (PTFE) elastic gasket or a silicone elastic gasket.

[0090] Specifically, on the one hand, the first elastic gasket can further fill the tiny gap between the locking block 734 and the first blade shaft 510. Even if there are slight unevenness on the surface of the blade shaft or a certain amount of wear occurs due to long-term use, the elastic gasket can always maintain a tight fit due to its compressibility and elastic recovery ability, effectively preventing the medium from leaking from the contact part. On the other hand, during the locking or unlocking process of the locking block 734, especially under conditions such as vibration, impact or frequent operation, the first elastic gasket can absorb part of the impact force to avoid direct rigid collision between the locking block 734 and the first blade shaft 510, thereby reducing scratches and wear on the surface of the blade shaft, extending the service life of the first blade shaft 510, reducing equipment maintenance costs and replacement frequency, helping to maintain the long-term stable performance of the valve, and improving the durability and reliability of the entire valve device.

[0091] Seventh embodiment:

[0092] The seventh embodiment includes the first embodiment, and is different from the first embodiment in that:

[0093] Preferably, if Figure 7 As shown, the sealing mechanism 700 includes a mounting cavity 741, a sealing plate 743 and an energy converter. Preferably, the mounting cavity 741 is an annular columnar structure surrounding the first blade shaft 510. The mounting cavity 741 is provided with a fifth mounting hole 745 communicating with the inner wall of the valve body 400.

[0094] The sealing plate 743 is arranged on the valve body 400, and an avoidance hole is opened on the sealing plate 743. The first blade shaft 510 passes through the avoidance hole and the first mounting hole 411 in sequence along the gas leakage direction; the first blade shaft 510 is opened with an annular groove 511, and an annular sealing block 746 is provided on the sealing plate 743, and the annular sealing block 746 is located in the annular groove 511; one end of the energy converter is arranged in the mounting cavity 741, and the other end of the energy converter passes through the fifth mounting hole 745 to the outside of the mounting cavity and is connected to the sealing plate 743. The energy converter is used to convert the energy generated by the gas leakage to drive the annular sealing block 746 of the sealing plate 743 to abut against the side wall of the annular groove 511, and then the piston 742 is linked to drive the sealing plate 743 to move and drive the annular sealing block 746 to squeeze the side wall of the annular groove 511 to seal the annular gap.

[0095] Preferably, the energy converter includes a piston 742 and a piston push rod 744, wherein the piston 742 is disc-shaped, the piston 742 is installed in the installation cavity 741 and divides the installation cavity 741 into a constant pressure cavity 747 and a variable pressure cavity 748 which are isolated from each other, the constant pressure cavity 747 is connected to the outside, and the variable pressure cavity 748 is connected to the interior of the valve body 400 through the first installation hole, one end of the piston push rod 744 is arranged on the piston 742, and the other end of the piston push rod 744 passes through the fifth installation hole 745 and is connected to the sealing plate 743.

[0096] Specifically, when the valve is in normal working state, the gas pressure in the constant pressure chamber 747 and the variable pressure chamber 748 is in a balanced state, and the piston 742 is stationary. When gas leakage occurs inside the valve, the leaked gas flows into the variable pressure chamber 748 of the installation chamber 741 along the preset air flow channel. As the gas continues to enter the variable pressure chamber 748, the gas pressure in the chamber gradually increases, and the piston 742 moves toward the sealing plate 743 under the action of the pressure difference, thereby driving the piston push rod 744 connected thereto to move and then transmit the pressure to the sealing plate 743, so that the sealing plate 743 is displaced along the axial direction of the first blade shaft 510. In this process, the annular sealing block 746 on the sealing plate 743 gradually approaches the annular groove 511 of the first blade shaft 510. When the annular sealing block 746 is subjected to the extrusion force generated by the displacement of the sealing plate 743, it gradually approaches and fits tightly with the side of the annular groove 511 close to the first valve body 400, thereby effectively blocking the annular gap and preventing further gas leakage.

[0097] The sealing mechanism 700 can make full use of the energy generated by gas leakage. When gas leakage occurs, the sealing of the annular gap can be automatically started by the cooperation of the mounting cavity 741 and the piston 742 without an additional driving device. After the gas flows into the variable pressure cavity 748, the change in pressure drives the piston 742 to move, and then drives the sealing plate 743 to make the annular sealing block 746 abut against the annular groove 511, completing the sealing of the annular gap between the first blade shaft 510 and the valve body 400. In this process, there is no additional energy consumption, which greatly saves energy costs, and the sealing mechanism 700 has great adaptability, that is, the greater the gas leakage trend, the stronger the pressure driving effect generated, and the better the sealing effect. In this way, not only can gas leakage be effectively prevented, and the safe and stable operation of the system is guaranteed, but also the equipment failure and maintenance frequency caused by sealing problems are reduced, the service life of the equipment is extended, and the reliability and economy of the overall equipment are improved, which has a very high application value in the field of industrial production.

[0098] Among them, a second elastic gasket is installed on one side of the sealing plate 743 for contacting the installation cavity 741. Preferably, the second elastic gasket can be a rubber elastic gasket, a polytetrafluoroethylene (PTFE) elastic gasket or a silicone elastic gasket. It can be understood that the working principle of the second elastic gasket is the same as that of the above-mentioned first elastic gasket, which will not be repeated here.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0101] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An energy-saving fan unit for air conditioning and ventilation systems, characterized in that: include: An air conditioning fan (100), the air conditioning fan (100) comprising an air inlet (110), a drive motor (120), a fan blade (130) and an air outlet (140), the drive motor (120) being drivingly connected to the fan blade (130), and the air inlet (110) and the air outlet (140) being sequentially connected along the blowing direction of the fan blade (130); A ventilation duct (200) comprising a plurality of pipe sections connected in sequence, wherein one of the pipe sections is connected to the air outlet (140); An air volume regulating valve (300) is located between two pipe sections, wherein one pipe section, the air volume regulating valve (300) and the other pipe section are connected in sequence, the air volume regulating valve (300) comprising a valve body (400), at least one valve flap (500) and a valve driving mechanism (600), the inner wall of the valve body (400) being provided with a first mounting hole (411), the valve flap (500) being provided with a first blade shaft (510), and the first blade shaft (510) being pivotally connected to the first mounting hole (411); the valve driving mechanism (600) being installed on the valve body (400) and drivingly connected to a plurality of the first blade shafts (510), the valve driving mechanism (600) being used to drive the valve flap (500) to rotate; At least one sealing mechanism (700), the sealing mechanism (700) comprising an installation cavity (741), a sealing plate (743) and an energy converter, the installation cavity (741) being provided with a fifth installation hole (745) communicating with the inner wall of the valve body (400), the sealing plate (743) being provided on the valve body (400), the sealing plate (743) being provided with an avoidance hole, the first blade shaft (510) being provided in sequence through the avoidance hole and the first installation hole (411) along a gas leakage direction; the first blade shaft (510) being provided with an annular groove (511), An annular sealing block (746) is provided on the sealing plate (743), and the annular sealing block (746) is embedded in the annular groove (511); one end of the energy converter is arranged in the installation cavity (741), and the other end of the energy converter passes through the fifth installation hole (745) to the outside of the installation cavity (741) and is connected to the sealing plate (743); the energy converter is used to convert the energy generated by gas leakage to drive the annular sealing block (746) of the sealing plate (743) to squeeze the side wall of the annular groove (511) to seal the annular gap.

2. The energy-saving fan unit according to claim 1, characterized in that: The energy converter comprises a piston (742) and a piston push rod (744); The piston (742) is installed in the installation cavity (741) and divides the installation cavity (741) into a constant pressure cavity (747) and a variable pressure cavity (748) which are isolated from each other. The constant pressure cavity (747) is connected to the outside, and the variable pressure cavity (748) is connected to the inside of the valve body (400) through the fifth installation hole (745). One end of the piston push rod (744) is provided on the piston (742), and the other end of the piston push rod (744) passes through the fifth installation hole (745) and is connected to the sealing plate (743). When gas leaks, the variable pressure chamber (748) is used to accommodate the leaked gas to drive the piston (742) to move in the direction of compressing the constant pressure chamber (747).

3. The energy-saving fan unit according to claim 2, characterized in that: A second elastic gasket is installed on one side of the sealing plate (743) for contacting the installation cavity (741).

4. The energy-saving fan unit according to claim 1, characterized in that: The inner wall of the valve body (400) is provided with a first sealing cavity (410); the valve body (400) is provided with a plurality of first mounting holes (411), the first mounting holes (411) are in communication with the first sealing cavity (410); the valve flap (500) is provided with a plurality of flaps, each of the valve flaps (500) is provided with at least one first blade shaft (510), and the plurality of first blade shafts (510) are pivotally connected to the plurality of first mounting holes (411) in a one-to-one correspondence; The first sealed cavity (410) is provided with a plurality of first partitions (412) stacked in sequence, each of the first partitions (412) is provided with a channel opening (413), and the channel openings (413) on different first partitions (412) are staggered in sequence along the stacking direction of the plurality of first partitions (412).

5. The energy-saving fan unit according to claim 4, characterized in that: The inner wall of the valve body (400) is further provided with a second sealing cavity (420), and the first sealing cavity (420) and the second sealing cavity (420) are respectively provided on two opposite sides of the valve body (400); The second sealing cavity (420) is provided with a plurality of second mounting holes (421), the second mounting holes (421) are in communication with the second sealing cavity (420), each of the valve flaps (500) is provided with at least one second blade shaft (520), and the plurality of second blade shafts (520) are pivotally connected to the plurality of second mounting holes (421) in a one-to-one correspondence; A plurality of sleeves (422) are provided in the second sealing cavity (420), the end of the second blade shaft (520) is located in the sleeve (422), and the end of the sleeve (422) away from the second blade shaft (520) is sealed with a blocking cover (423).

6. The energy-saving fan unit according to claim 5, characterized in that: The outer wall of the valve body (400) is provided with a third mounting hole (414), and the third mounting hole (414) is coaxially arranged with one of the first mounting holes (411); The valve drive mechanism (600) is located outside the valve body (400), and the valve drive mechanism (600) has a first output end (610), wherein an end of one of the first blade shafts (510) passes through the third mounting hole (414) from the first sealing cavity (410) to the outside of the valve body (400) and is drivingly connected to the first output end (610); The first blade shaft (510) connected to the first output end (610) is connected to a first transmission mechanism (611), the first transmission mechanism (611) includes a first synchronous belt (612) and at least one first driven wheel (613), the first synchronous belt (612) is arranged in the first sealed cavity (410), and the first synchronous belt (612) is wound around at least one of the first driven wheels (613), and each of the first driven wheels (613) is linked and connected to one of the first blade shafts (510) in a one-to-one corresponding manner.

7. The energy-saving fan unit according to claim 5, characterized in that: The outer wall of the valve body (400) is provided with a plurality of fourth mounting holes (415), and the plurality of fourth mounting holes (415) are respectively coaxially arranged with the plurality of first mounting holes (411), and the ends of the plurality of first blade shafts (510) pass through the fourth mounting holes (415) from the first sealing cavity (410) to the outside of the valve body (400), and a second partition plate (416) is provided between two adjacent first blade shafts (510); the plurality of second partition plates (416) divide the first sealing cavity (410) into a plurality of third sealing cavities (417) that are independent and isolated from each other, and the plurality of first blade shafts (510) are correspondingly passed through one of the third sealing cavities (417); The valve driving mechanism (600) has a second output end (620), and the second output end (620) is drivingly connected to the end of one of the first blade shafts (510). The first blade shaft (510) connected to the second output end (620) is connected to a second transmission mechanism (621), and the second transmission mechanism (621) includes a second synchronous belt (622) and at least one second driven wheel (623). The second synchronous belt (622) is arranged outside the valve body (400), and the second synchronous belt (622) is wound around at least one of the second driven wheels (623), and each of the second driven wheels (623) is linked and connected to one of the first blade shafts (510) in a one-to-one corresponding manner.

8. The energy-saving fan unit according to any one of claims 1 to 7, characterized in that: The inner wall of the ventilation duct (200) is provided with a plurality of guide grooves, and the plurality of guide grooves are arranged in sequence along the gas flow direction.

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