Corrosion-resistant centrifugal exhaust fan

Abstract

The utility model relates to the technical field of air treatment, and discloses a corrosion-resistant centrifugal exhaust fan which comprises a main body assembly and an exhaust fan body, a motor is fixed on one side of the exhaust fan body, a base is fixed at the bottom of the motor, a sealing assembly is arranged on one side of the exhaust fan body and comprises a sealing piece, and the sealing piece comprises a sealing plate. The sealing plate is arranged on one side of the exhaust fan body, and a bottom plate is arranged on one side of the sealing plate. The centrifugal exhaust fan has the advantages that when the centrifugal exhaust fan is in an unused state, the air inlet in one side of the centrifugal exhaust fan can be automatically closed, a good closed state is formed, and external dust, sundries, bad gas and the like are effectively prevented from entering the fan. When the centrifugal exhaust fan is started, the impeller starts to rotate and generates wind power, the air inlet can be automatically opened, external air can be smoothly received, and it is ensured that the fan can normally conduct related operations such as ventilation and air exhaust.

Description

Technical Field

[0001] This utility model relates to the field of air treatment technology, and in particular to a corrosion-resistant centrifugal exhaust fan. Background Technology

[0002] A corrosion-resistant centrifugal exhaust fan is a special type of ventilation equipment. Its key components, such as the casing and impeller, are made of corrosion-resistant materials such as stainless steel and fiberglass, or undergo corresponding corrosion-resistant treatment processes, enabling it to operate stably in harsh environments containing corrosive gases. It primarily uses a motor to drive the impeller to rotate at high speed, allowing gas to enter through the inlet. Centrifugal force then propels the gas towards the edge of the impeller before it is discharged through the outlet, achieving functions such as ventilation and expelling polluted or harmful gases. Even when the corrosion-resistant centrifugal exhaust fan is not in use, its inlet remains open. With the inlet open for extended periods, dust, sand, and other solid particles continuously enter the fan, rubbing against the casing and impeller surfaces as the impeller rotates, abrading the material and making it rough. This damages precision and structural integrity. Over time, the impeller's dynamic balance is disrupted, and operational vibration intensifies, accelerating component wear. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing corrosion-resistant centrifugal exhaust fans, this utility model is proposed.

[0005] Therefore, the problem that this utility model aims to solve is that the air inlet is left open for a long time, allowing dust and other solid particles to enter the fan. The friction caused by the impeller rotation leads to damage to the material of the components, destruction of precision and structural integrity, and ultimately, the dynamic balance of the impeller is broken, resulting in increased vibration and accelerated wear of the components.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a corrosion-resistant centrifugal exhaust fan, which includes a main component, including an exhaust fan body, a motor fixed on one side of the exhaust fan body, and a base fixed at the bottom of the motor;

[0007] A sealing assembly is disposed on one side of the exhaust fan body and includes a sealing member, the sealing member including a sealing plate, the sealing plate being disposed on one side of the exhaust fan body, a base plate being disposed on one side of the sealing plate, the base plate and the sealing plate being hinged together, a driving block being fixed on one side of the sealing plate, and a toothed ring being sleeved on the outer side of the driving block.

[0008] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, the enclosed assembly further includes a support member, the support member includes a connecting ring, the connecting ring is fixed to one side of the toothed ring, a positioning plate is sleeved on the outside of the connecting ring, the positioning plate and the connecting ring are movably connected, and the positioning plate is fixed to one side of the base plate.

[0009] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, the positioning plate is provided with a groove corresponding to the connecting ring, and the connecting ring slides within the groove.

[0010] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, a toothed block is fixed on one side of the toothed ring, and a toothed rack is provided on one side of the toothed block, wherein the toothed block and the toothed rack mesh.

[0011] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, a movable plate is fixed to the bottom of the rack, a movable column is fixed to the top of the movable plate, a connecting frame is fixed to the top of the movable column, an extrusion wheel is provided inside the connecting frame, and the extrusion wheel and the connecting frame are hinged.

[0012] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, the enclosed assembly further includes a movable component, the movable component includes a fixed plate, the fixed plate is sleeved on the outside of the movable column, the movable column and the fixed plate are movably connected, a first spring is fixed at the bottom of the fixed plate, and one end of the first spring is fixed to the top of the movable plate.

[0013] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, an inclined block is fixed to the top of the extrusion wheel, a support strip is inserted into one side of the inclined block, the support strip and the inclined block are movably connected, and the support strip is fixed to one side of the exhaust fan body.

[0014] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, a drive plate is fixed to one side of the inclined block, a drive column is fixed to one side of the drive plate, and a push plate is fixed to one end of the drive column.

[0015] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, a second spring is fixed to one side of the push plate, and the second spring is fixed to one side of the drive plate.

[0016] In a preferred embodiment of the corrosion-resistant centrifugal exhaust fan of this utility model, an air duct is sleeved on the outside of the drive column, the air duct and the drive column are movably connected, and a fixed sleeve is sleeved on the outside of the air duct.

[0017] The beneficial effects of this invention are as follows: When the centrifugal exhaust fan is not in use, the air inlet on one side can automatically close, forming a good sealing state and effectively preventing external dust, debris, and harmful gases from entering the fan. When the centrifugal exhaust fan is started, the moment the impeller begins to rotate and generate airflow, the air inlet will automatically open, smoothly accepting external air and ensuring that the fan can perform ventilation, exhaust, and other related operations normally. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a structural diagram of a corrosion-resistant centrifugal exhaust fan.

[0020] Figure 2 This is a structural diagram of the enclosed plate of a corrosion-resistant centrifugal exhaust fan.

[0021] Figure 3 This is a diagram of the rack and pinion structure of a corrosion-resistant centrifugal exhaust fan.

[0022] Figure 4 For corrosion-resistant centrifugal exhaust fans Figure 3 Enlarged view of the structure at point A in the middle.

[0023] Figure 5 This is a cross-sectional view of the exhaust duct of a corrosion-resistant centrifugal exhaust fan. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1

[0028] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a corrosion-resistant centrifugal exhaust fan. The corrosion-resistant centrifugal exhaust fan includes a main body component 100 and a sealing component 200. The two components work together to automatically close and block external impurities and harmful gases when the fan is not in use. When the impeller rotates and generates wind power after startup, it automatically opens to ensure normal ventilation, air exchange and exhaust operations.

[0029] The main component 100 includes an exhaust fan body 101, a motor 102 fixed on one side of the exhaust fan body 101, and a base 103 fixed at the bottom of the motor 102.

[0030] The exhaust fan body 101 is the core component of the corrosion-resistant centrifugal exhaust fan. It contains key structures such as an impeller and is responsible for drawing in gas through impeller rotation, transporting and expelling gas using centrifugal force, so as to complete the functions of ventilation, air exchange, and exhaust of polluted or harmful gases. The motor 102 is mainly used to provide power to the exhaust fan body 101, drive the impeller to rotate at high speed, and enable the entire ventilation equipment to operate normally and achieve the corresponding ventilation and exhaust functions. The base 103 provides stable support for the motor 102, ensuring that the motor 102 and the exhaust fan body 101 connected to it can be placed stably during operation, avoiding shaking, tipping or other situations.

[0031] A sealing component 200 is disposed on one side of the exhaust fan body 101 and includes a sealing member 201. The sealing member 201 includes a sealing plate 201a, which is disposed on one side of the exhaust fan body 101. A base plate 201b is provided on one side of the sealing plate 201a. The base plate 201b and the sealing plate 201a are hinged together. A drive block 201c is fixed on one side of the sealing plate 201a. A toothed ring 201d is sleeved on the outer side of the drive block 201c.

[0032] There are five sealing plates 201a, all located on one side of the exhaust fan body 101. The drive block 201c has teeth on one side that mesh with the toothed ring 201d. When it is necessary to close one side of the exhaust fan body 101, the toothed ring 201d is rotated. The rotation of the toothed ring 201d can drive the drive block 201c to rotate. At this time, the rotation of the drive block 201c can drive the sealing plates 201a to move and close, thereby closing one side of the exhaust fan body 101. The base plate 201b can support the sealing plates 201a to prevent them from shifting during movement.

[0033] When it is necessary to close one side of the exhaust fan body 101, rotate the gear ring 201d. The gear ring 201d drives the drive block 201c to rotate, and the drive block 201c drives the closing plate 201a to move and close. The closing plate 201a is supported by the base plate 201b to prevent it from shifting, thus completing the closure. To open it, simply rotate the gear ring 201d in the opposite direction.

[0034] Example 2

[0035] Reference Figures 2-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, the enclosure component 200 also includes a support member 202, which includes a connecting ring 202a. The connecting ring 202a is fixed to one side of the toothed ring 201d. A positioning plate 202b is sleeved on the outside of the connecting ring 202a. The positioning plate 202b and the connecting ring 202a are movably connected. The positioning plate 202b is fixed to one side of the base plate 201b.

[0037] Rotating the connecting ring 202a will drive the toothed ring 201d to rotate. The positioning plate 202b can support the connecting ring 202a and prevent it from shifting during movement.

[0038] Specifically, the positioning plate 202b has a groove X corresponding to the connecting ring 202a, and the connecting ring 202a slides within the groove X.

[0039] When the connecting ring 202a moves, it can slide within the slide groove X. The slide groove X can support the connecting ring 202a and prevent it from shifting.

[0040] Specifically, a toothed block 202c is fixed on one side of the toothed ring 201d, and a rack 202d is provided on one side of the toothed block 202c. The toothed block 202c and the rack 202d mesh with each other.

[0041] When it is necessary to move the gear ring 201d, the impeller on the exhaust fan body 101 is rotated by starting the motor 102 to generate wind power, which can then drive the rack 202d to move. The movement of the rack 202d can drive the gear block 202c to rotate, and the rotation of the gear block 202c can drive the gear ring 201d to move.

[0042] Specifically, a movable plate 202e is fixed to the bottom of the rack 202d, a movable column 202k is fixed to the top of the movable plate 202e, a connecting frame 202f is fixed to the top of the movable column 202k, and a pressing wheel 202g is provided inside the connecting frame 202f. The pressing wheel 202g and the connecting frame 202f are hinged together.

[0043] The extrusion roller 202g is pressed and moved, which in turn drives the connecting frame 202f to move. When the connecting frame 202f moves, it can drive the moving column 202k to move. At this time, the movement of the moving column 202k can drive the moving plate 202e to move, and the movement of the moving plate 202e can drive the rack 202d to move.

[0044] Specifically, the closure component 200 also includes a movable component 203, which includes a fixed plate 203a. The fixed plate 203a is sleeved on the outside of the movable column 202k. The movable column 202k and the fixed plate 203a are movably connected. A first spring 203b is fixed at the bottom of the fixed plate 203a, and one end of the first spring 203b is fixed at the top of the movable plate 202e.

[0045] The fixing plate 203a is fixed to one side of the exhaust fan body 101. The fixing plate 203a can support the moving column 202k and prevent the moving column 202k from shifting. When the moving column 202k moves, it can apply a pulling force to the first spring 203b, which can drive the rack 202d to move and open the closing plate 201a. When the motor 102 is turned off and stops generating air, the rebound force of the first spring 203b can drive the moving plate 202e back to its original position, so that the closing plate 201a can be closed again.

[0046] Specifically, a sloping block 203c is fixed to the top of the extrusion wheel 202g, and a support bar 203d is inserted into one side of the sloping block 203c. The support bar 203d and the sloping block 203c are movably connected, and the support bar 203d is fixed to one side of the exhaust fan body 101.

[0047] The support bar 203d is fixed to one side of the exhaust fan body 101. The support bar 203d can support the inclined block 203c and prevent the inclined block 203c from shifting when it moves. When the motor 102 drives the impeller to rotate, it generates wind force, which can move the inclined block 203c. The movement of the inclined block 203c can squeeze the extrusion wheel 202g and make it move.

[0048] When motor 102 is started, it drives the impeller on the exhaust fan body 101 to rotate, generating airflow. This airflow causes the inclined block 203c to move. Because the inclined block 203c is fixed to the top of the extrusion roller 202g, and the support bar 203d supports the inclined block 203c to prevent it from shifting, the movement of the inclined block 203c will exert pressure on the extrusion roller 202g, causing it to move.

[0049] After the extrusion roller 202g moves, it will drive the connecting frame 202f that is hinged to it to move together. When the connecting frame 202f moves, it will drive the moving column 202k fixed below it to move as well.

[0050] During the movement of the movable column 202k, although it is movably connected to the fixed plate 203a, the fixed plate 203a is fixed to one side of the exhaust fan body 101, which can support the movable column 202k and prevent it from shifting. At the same time, the movement of the movable column 202k will exert a pulling force on the first spring 203b fixedly connected below it. One end of the first spring 203b is fixed to the top of the movable plate 202e. As the movable column 202k moves, it drives the movable plate 202e to move.

[0051] After the movable plate 202e moves, it drives the rack 202d fixed at its bottom to move. When the rack 202d moves, it meshes with the tooth block 202c fixed on one side of the tooth ring 201d. The movement of the rack 202d will drive the tooth block 202c to rotate.

[0052] After the toothed block 202c rotates, it drives the toothed ring 201d connected to it to move. The connecting ring 202a fixed on one side of the toothed ring 201d has a positioning plate 202b sleeved on its outer side. The positioning plate 202b is fixed to one side of the base plate 201b and is movably connected to the connecting ring 202a. The connecting ring 202a can slide in the groove X opened on the positioning plate 202b. The groove X and the positioning plate 202b can support the connecting ring 202a and prevent it from shifting. The connecting ring 202a rotates with the toothed ring 201d. The rotation of the toothed ring 201d drives the driving blocks 201c on each of the closed plates 201a to rotate. The driving blocks 201c mesh with the toothed ring 201d. The rotation of the driving blocks 201c drives the closed plates 201a to move in a direction away from each other, so that the closed plates 201a open. One side of the exhaust fan body 101 is in a state where normal ventilation and air intake are possible, and the fan can then operate normally.

[0053] When motor 102 is turned off and wind power is stopped, the first spring 203b, which was previously stretched, will use its own rebound force to drive the moving plate 202e to move in the opposite direction and return to its original position.

[0054] The movement of the movable plate 202e causes the rack 202d to move in the opposite direction, the rack 202d causes the tooth block 202c that meshes with it to rotate in the opposite direction, and the tooth block 202c causes the tooth ring 201d to move in the opposite direction.

[0055] The reverse movement of the gear ring 201d drives the sealing plate 201a to move in the closing direction through the drive block 201c. The five sealing plates 201a gradually approach each other and close, ultimately achieving the sealing of one side of the exhaust fan body 101, preventing external dust and other objects from entering the fan.

[0056] Example 3

[0057] Reference Figures 1-5 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0058] Specifically, a drive plate 203e is fixed to one side of the inclined block 203c, a drive column 203f is fixed to one side of the drive plate 203e, and a push plate 203g is fixed to one end of the drive column 203f.

[0059] The wind can move the push plate 203g, which in turn moves the drive column 203f. The movement of the drive column 203f can then move the drive plate 203e, which in turn moves the inclined block 203c.

[0060] Specifically, a second spring 203h is fixed to one side of the push plate 203g, and the second spring 203h is fixed to one side of the drive plate 203e.

[0061] When the push plate 203g moves, it can apply a squeezing force to the second spring 203h. The rebound force of the second spring 203h can drive the push plate 203g back to its original position, thereby allowing the closing plate 201a to close again.

[0062] Specifically, an air duct 203i is fitted on the outside of the drive column 203f, the air duct 203i and the drive column 203f are movably connected, and a fixed sleeve 203j is fitted on the outside of the air duct 203i.

[0063] By setting the air duct 203i, the air force can be directed to one side of the push plate 203g, thereby driving the push plate 203g to move. The fixing sleeve 203j is fixed to the inner wall of the exhaust fan body 101, and the fixing sleeve 203j can support the air duct 203i.

[0064] When the motor (102) starts to rotate and drives the impeller to rotate, wind will be generated inside the exhaust fan body (101). At this time, since the air duct (203i) is located at the air inlet, the generated wind will be transmitted to the push plate (203g) along the air duct (203i). Under the action of the wind, the push plate (203g) will be pulled back and start to move. The movement of the push plate (203g) will drive a series of related components to work together, and finally the sealing plate (201a) can be opened smoothly.

[0065] When in use, start the motor 102, which drives the impeller of the exhaust fan body 101 to rotate and generate airflow.

[0066] The wind is drawn through the air duct 203i to one side of the push plate 203g, which pushes the push plate 203g to move. The movement of the push plate 203g causes the drive column 203f to move, the drive column 203f causes the drive plate 203e to move, and the drive plate 203e causes the inclined block 203c to move.

[0067] The inclined block 203c moves to compress the extrusion roller 202g, the extrusion roller 202g drives the connecting frame 202f to move, the connecting frame 202f drives the moving column 202k to move, the moving column 202k pulls the first spring 203b and drives the moving plate 202e to move.

[0068] The moving plate 202e drives the rack 202d to move, the rack 202d drives the toothed block 202c to rotate, the toothed block 202c drives the toothed ring 201d to rotate, and the toothed ring 201d slides in the groove X of the positioning plate 202b through the connecting ring 202a to maintain stability. The rotation of the toothed ring 201d drives the drive block 201c to rotate, and the drive block 201c drives the sealing plate 201a to move away from each other, opening the sealing plate, and the fan can operate normally.

[0069] When motor 102 is turned off, the wind power is stopped, and push plate 203g returns to its original position under the rebound action of second spring 203h.

[0070] The first spring 203b rebounds, causing the moving plate 202e to move in the opposite direction. The moving plate 202e causes the rack 202d to move in the opposite direction. The rack 202d causes the tooth block 202c to rotate in the opposite direction. The tooth block 202c causes the tooth ring 201d to move in the opposite direction.

[0071] The reverse movement of the toothed ring 201d drives the closing plate 201a to move in the closing direction through the drive block 201c. The five closing plates 201a move closer to each other and close, completing the closure of one side of the exhaust fan body 101.

[0072] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A corrosion-resistant centrifugal exhaust fan, characterized in that: include, The main component (100) includes an exhaust fan body (101), a motor (102) is fixed on one side of the exhaust fan body (101), and a base (103) is fixed at the bottom of the motor (102). A sealing assembly (200) is disposed on one side of the exhaust fan body (101) and includes a sealing member (201). The sealing member (201) includes a sealing plate (201a). The sealing plate (201a) is disposed on one side of the exhaust fan body (101). A base plate (201b) is disposed on one side of the sealing plate (201a). The base plate (201b) and the sealing plate (201a) are hinged together. A driving block (201c) is fixed on one side of the sealing plate (201a). A toothed ring (201d) is sleeved on the outer side of the driving block (201c).

2. The corrosion-resistant centrifugal exhaust fan as described in claim 1, characterized in that: The enclosure assembly (200) further includes a support member (202), which includes a connecting ring (202a) fixed to one side of the toothed ring (201d). A positioning plate (202b) is sleeved on the outside of the connecting ring (202a), and the positioning plate (202b) and the connecting ring (202a) are movably connected. The positioning plate (202b) is fixed to one side of the base plate (201b).

3. The corrosion-resistant centrifugal exhaust fan as described in claim 2, characterized in that: The positioning plate (202b) has a groove (X) corresponding to the connecting ring (202a), and the connecting ring (202a) slides within the groove (X).

4. The corrosion-resistant centrifugal exhaust fan as described in claim 3, characterized in that: A toothed block (202c) is fixed on one side of the toothed ring (201d), and a toothed rack (202d) is provided on one side of the toothed block (202c). The toothed block (202c) and the toothed rack (202d) mesh with each other.

5. The corrosion-resistant centrifugal exhaust fan as described in claim 4, characterized in that: A movable plate (202e) is fixed to the bottom of the rack (202d), a movable column (202k) is fixed to the top of the movable plate (202e), a connecting frame (202f) is fixed to the top of the movable column (202k), and an extrusion wheel (202g) is provided inside the connecting frame (202f). The extrusion wheel (202g) and the connecting frame (202f) are hinged together.

6. The corrosion-resistant centrifugal exhaust fan as described in claim 5, characterized in that: The enclosure component (200) also includes a movable component (203), which includes a fixed plate (203a). The fixed plate (203a) is sleeved on the outside of the movable column (202k). The movable column (202k) and the fixed plate (203a) are movably connected. A first spring (203b) is fixed at the bottom of the fixed plate (203a), and one end of the first spring (203b) is fixed at the top of the movable plate (202e).

7. The corrosion-resistant centrifugal exhaust fan as described in claim 5 or 6, characterized in that: The top of the extrusion wheel (202g) is fixed with a slope block (203c), and a support strip (203d) is inserted into one side of the slope block (203c). The support strip (203d) and the slope block (203c) are movably connected, and the support strip (203d) is fixed to one side of the exhaust fan body (101).

8. The corrosion-resistant centrifugal exhaust fan as described in claim 7, characterized in that: A drive plate (203e) is fixed to one side of the inclined block (203c), a drive column (203f) is fixed to one side of the drive plate (203e), and a push plate (203g) is fixed to one end of the drive column (203f).

9. The corrosion-resistant centrifugal exhaust fan as described in claim 8, characterized in that: A second spring (203h) is fixed to one side of the push plate (203g), and the second spring (203h) is fixed to one side of the drive plate (203e).

10. The corrosion-resistant centrifugal exhaust fan as described in claim 9, characterized in that: An air duct (203i) is fitted on the outside of the drive column (203f), the air duct (203i) and the drive column (203f) are movably connected, and a fixing sleeve (203j) is fitted on the outside of the air duct (203i).

Images