A volute fan

Abstract

The utility model discloses a volute fan, including casing, fan main part and mounting bracket. Casing is provided with fan cavity, air inlet and inner exhaust duct, and air inlet is communicated with fan cavity, and inner exhaust duct is communicated with fan cavity, and the outer wall of casing is provided with mounting hole, and the mounting hole is through to inner exhaust duct, fan main part sets up in casing and is located in fan cavity, and fan main part can form the air flow from air inlet to inner exhaust duct, mounting bracket is detachably inserted in mounting hole, and mounting bracket can be configured as first mounting bracket, and first mounting bracket is provided with filter piece, and filter piece is located in inner exhaust duct. Since first mounting bracket is provided with filter piece, and first mounting bracket is inserted in mounting hole, filter piece is located in inner exhaust duct, and filter piece only needs to be inserted and unplugged first mounting bracket, and installation and replacement maintenance can be completed, and installation and replacement maintenance of filter piece are relatively simple and convenient.

Description

Technical Field

[0001] This utility model relates to fans, and more particularly to a volute fan. Background Technology

[0002] Range hoods and other household appliances are equipped with volute-type fans. These fans draw in indoor air through an inlet and exhaust it outdoors or, after filtration, re-exhaust it indoors. Some existing volute-type fans consist of a casing and a main body. The casing includes a fan cavity, an inlet, an internal exhaust duct, and an external exhaust duct. The main body is located within the fan cavity and creates airflow from the inlet to either the internal or external exhaust duct. Some volute-type fans can be mounted on a bracket using screws to secure it to the exhaust duct or inlet. This bracket contains a filter to filter the airflow before exhaust. However, this method of mounting the filter on a volute-type fan is relatively complex, and replacement and maintenance are relatively troublesome. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a volute-type fan that simplifies the method of installing filter elements via a mounting bracket, facilitating replacement and maintenance.

[0004] A volute-type fan according to an embodiment of the present invention includes a housing, a fan body, and a mounting bracket. The housing is provided with a fan cavity, an air inlet, and an internal exhaust duct. The air inlet communicates with the fan cavity, and the internal exhaust duct communicates with the fan cavity. The outer wall of the housing is provided with a mounting hole that extends through the internal exhaust duct. The fan body is disposed in the housing and located within the fan cavity, and the fan body can generate airflow from the air inlet to the internal exhaust duct. The mounting bracket is detachably inserted into the mounting hole. The mounting bracket can be configured as a first mounting bracket, and the first mounting bracket is provided with a filter element located in the internal exhaust duct.

[0005] The volute fan according to the present invention has at least the following beneficial effects: It has a filter element in the internal exhaust duct, allowing the air discharged into the room by the volute fan to be filtered before being discharged, thus maintaining the cleanliness of the indoor air; since the first mounting bracket is equipped with a filter element, and the first mounting bracket is inserted into the mounting hole, the filter element is located in the internal exhaust duct, so that the filter element can be installed and replaced simply by inserting and removing the first mounting bracket. The installation and replacement of the filter element are relatively simple and convenient.

[0006] According to some embodiments of the present invention, the mounting bracket is provided with a snap-fit ​​part, the housing is provided with a snap-fit ​​mating part, and the snap-fit ​​part and the snap-fit ​​mating part are snap-fit ​​mating.

[0007] According to some embodiments of this utility model, the filter element is an activated carbon filter cotton mesh.

[0008] According to some embodiments of the present invention, a handle is provided on the side of the mounting bracket away from the internal exhaust duct.

[0009] According to some embodiments of the present invention, it also includes a partition, and the housing is further provided with an external exhaust duct. The external exhaust duct is connected to the fan cavity. The fan body can form an airflow from the air inlet to the external exhaust duct. The partition is rotatably mounted on the housing and can be rotated to open or close the internal exhaust duct.

[0010] According to some embodiments of the present invention, the mounting bracket blocks the mounting hole, and the mounting bracket can be configured as a second mounting bracket, the second mounting bracket avoiding the internal exhaust duct.

[0011] According to some embodiments of the present invention, the partition is integrally formed with a lever portion, and the housing is provided with an arc-shaped guide groove around the rotation axis of the partition, with the lever portion passing through the arc-shaped guide groove and exposed outside the housing.

[0012] According to some embodiments of the present invention, the partition member is rotatably inserted into the housing along its rotation axis. The handle portion includes a connecting block and a limiting block. The connecting block is located in the arc-shaped guide groove. The width of the limiting block is greater than the width of the arc-shaped guide groove. The limiting block is connected to the end of the connecting block away from the internal exhaust duct and exposed outside the housing. The housing is provided with a clearance hole. The cross-section of the clearance hole is greater than the cross-section of the limiting block. The axis of the clearance hole is parallel to the rotation axis of the partition member. One end of the arc-shaped guide groove extends through the clearance hole.

[0013] According to some embodiments of the present invention, the main body of the fan includes a centrifugal impeller and a motor. The motor is disposed in the housing and is used to drive the centrifugal impeller to rotate. The outer periphery of the centrifugal impeller is opposite to the inner exhaust duct. One end of the centrifugal impeller along its rotation axis is opposite to the air inlet. Multiple fan blades are arranged around the centrifugal impeller around its rotation axis. The fan blades extend along the rotation axis of the centrifugal impeller. The cross-section of the fan blades is arc-shaped, and an air flow channel is formed between two adjacent fan blades.

[0014] According to some embodiments of the present invention, an arc-shaped groove is provided on the inner arc side of the fan blade, so that the thickness of the fan blade tends to increase in the radial outward direction along the centrifugal impeller.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 A three-dimensional schematic diagram of the volute-type fan of this utility model with the internal exhaust duct open and the first mounting bracket used;

[0018] Figure 2 This is a perspective view of the volute fan of this utility model embodiment when the internal exhaust duct is opened and the first mounting bracket is used;

[0019] Figure 3 This is a perspective view of the volute-type fan disassembling the first mounting frame according to an embodiment of the present utility model;

[0020] Figure 4 This is a three-dimensional schematic diagram of a volute-type fan with a closed internal exhaust duct and using a second mounting bracket, according to an embodiment of the present utility model.

[0021] Figure 5 This is an exploded view of the first mounting bracket according to an embodiment of the present utility model;

[0022] Figure 6 This is a perspective view of the second mounting bracket according to an embodiment of the present utility model;

[0023] Figure 7 This is a schematic diagram of the centrifugal impeller according to an embodiment of the present utility model;

[0024] Figure 8 This is a three-dimensional schematic diagram of the shell after disassembling and mounting the bracket and partition components according to an embodiment of this utility model;

[0025] Figure 9 This is a three-dimensional schematic diagram of the partition component according to an embodiment of the present utility model.

[0026] Figure label:

[0027] Housing 100, fan cavity 110, air inlet 120, internal exhaust duct 130, mounting hole 140, snap-fit ​​part 150, external exhaust duct 160, arc-shaped guide groove 170, clearance hole 180.

[0028] Fan body 200, centrifugal impeller 210, fan blade 211, air flow channel 212, arc groove 213, motor 220;

[0029] Mounting bracket 300, snap-fit ​​part 301, handle 302, first mounting bracket 310, filter element 311, mounting groove 312, stop block 313, second mounting bracket 320;

[0030] Partition 400, lever part 410, connecting block 411, limit block 412, gear shift protrusion 420. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Reference Figures 1 to 9 The volute-type fan of this utility model includes a housing 100, a fan body 200, and a mounting bracket 300. The housing 100 is provided with a fan cavity 110, an air inlet 120, and an internal exhaust duct 130. The air inlet 120 communicates with the fan cavity 110, and the internal exhaust duct 130 communicates with the fan cavity 110. The outer wall of the housing 100 is provided with a mounting hole 140, which extends to the internal exhaust duct 130. The fan body 200 is disposed in the housing 100 and located inside the fan cavity 110. The fan body 200 can generate airflow from the air inlet 120 to the internal exhaust duct 130. The mounting bracket 300 is detachably inserted into the mounting hole 140. The mounting bracket 300 can be configured as a first mounting bracket 310. The first mounting bracket 310 is provided with a filter element 311, which is located in the internal exhaust duct 130.

[0036] A filter element 311 is installed within the internal exhaust duct 130, allowing the air discharged from the volute fan into the room to be filtered before being discharged, maintaining the cleanliness of the indoor air. Since the first mounting bracket 310 is equipped with the filter element 311, and the first mounting bracket 310 is inserted into the mounting hole 140, the filter element 311 is located within the internal exhaust duct 130. This allows for easy installation and replacement of the filter element 311 simply by inserting and removing the first mounting bracket 310, making installation and replacement relatively simple and convenient. The location of the filter element 311 within the internal exhaust duct 130 allows for a more compact layout of the filter element 311, the first mounting bracket 310, and the housing 100, which is beneficial for miniaturization.

[0037] In the embodiments, reference is made to Figure 5 and Figure 6 The mounting bracket 300 is provided with a snap-fit ​​portion 301, and the housing 100 is provided with a snap-fit ​​mating portion 150. The snap-fit ​​portion 301 and the snap-fit ​​mating portion 150 engage with each other. When the mounting bracket 300 is inserted into the mounting hole 140, the snap-fit ​​portion 301 and the snap-fit ​​mating portion 150 engage, which improves the connection and fixation strength between the mounting bracket 300 and the housing 100 and reduces the risk of the mounting bracket 300 loosening. When the user applies a large force to pull out the mounting bracket 300, the snap-fit ​​portion 301 separates from the snap-fit ​​mating portion 150, allowing the mounting bracket 300 to be pulled out.

[0038] Specifically, the snap-fit ​​portion 301 is an elastic hook, and the snap-fit ​​mating portion 150 is a slot. It is conceivable that in some other embodiments, the snap-fit ​​portion 301 may also be a slot, and the snap-fit ​​mating portion 150 may be an elastic hook, etc.

[0039] In the embodiments, reference is made to Figure 3 The filter element 311 is an activated carbon filter cotton mesh, which can filter dust in the airflow and adsorb odors in the airflow through activated carbon, and has a relatively comprehensive filtration effect on the airflow emitted internally.

[0040] Specifically, the activated carbon filter mesh is perpendicular to the internal exhaust duct by 130 degrees, resulting in better filtration.

[0041] It is conceivable that in other embodiments, the filter element 311 may also be other structures, such as a textile filter or activated carbon particles.

[0042] In the embodiments, reference is made to Figure 2 A handle 302 is provided on the side of the mounting bracket 300 away from the internal exhaust duct 130, which makes it convenient for users to hold the handle 302 to insert or pull out the mounting bracket 300 to install or remove the filter element 311, making it relatively convenient to use.

[0043] Specifically, in some areas, the exhaust air from range hoods and other household appliances needs to be vented indoors; while in other areas, the exhaust air from range hoods and other household appliances needs to be vented outdoors. Therefore, the following improvements have been made:

[0044] In the embodiment, reference Figure 1 and Figure 4 It also includes a partition 400, and the housing 100 is also provided with an external exhaust duct 160, which is connected to the fan cavity 110. The fan body 200 can form an airflow from the air inlet 120 to the external exhaust duct 160. The partition 400 is rotatably mounted on the housing 100 and can be rotated to open or close the internal exhaust duct 130.

[0045] When the partition 400 rotates to close the internal exhaust duct 130, all the airflow in the fan cavity 110 is discharged to the outside through the external exhaust duct 160, and the internal exhaust duct 130 is not used at this time. When it is necessary to discharge airflow into the room to form an internal circulation, the partition 400 can rotate to the open position, allowing some or all of the airflow in the fan cavity 110 to be discharged into the room through the internal exhaust duct 130. The above-described volute fan can meet different usage needs and has good versatility.

[0046] In the embodiment, reference Figure 4 Mounting bracket 300 blocks mounting hole 140. Mounting bracket 300 can be configured as a second mounting bracket 320. The second mounting bracket 320 avoids the internal exhaust duct 130.

[0047] When the volute fan is used in products requiring indoor exhaust, the partition 400 can be rotated to open the internal exhaust duct 130, and the mounting bracket 300 uses a first mounting bracket 310, on which a filter 311 is installed to filter the internally exhausted airflow. When the volute fan is used in products requiring outdoor exhaust, the partition 400 can be rotated to close the internal exhaust duct 130, allowing the airflow to be exhausted through the external exhaust duct 160. For such products, the internal exhaust duct 130 is not required, so the mounting bracket 300 can use a second mounting bracket 320. The second mounting bracket 320 serves to seal the mounting hole 140 and does not include a filter 311, thus reducing the cost of the volute fan. The aforementioned volute fan improves the versatility of the housing 100.

[0048] In the embodiment, reference 2 and Figure 9The partition 400 is integrally formed with a lever portion 410. The housing 100 is provided with an arc-shaped guide groove 170 around the rotation axis of the partition 400. The lever portion 410 passes through the arc-shaped guide groove 170 and is exposed outside the housing 100. By providing the lever portion 410, the user can use the lever portion 410 to drive the partition 400 to rotate, thereby manually opening or closing the internal exhaust duct 130, which is convenient for adjustment. By integrally forming the lever portion 410 on the partition 400, the number of parts is reduced and the structure is simplified.

[0049] In the embodiments, reference is made to Figure 9 The partition 400 is rotatably inserted into the housing 100 along its rotation axis. The handle 410 includes a connecting block 411 and a limiting block 412. The connecting block 411 is located in the arc-shaped guide groove 170. The width of the limiting block 412 is greater than the width of the arc-shaped guide groove 170. The limiting block 412 is connected to the end of the connecting block 411 away from the internal exhaust duct 130 and exposed in the housing 100. The housing 100 is provided with a clearance hole 180. The cross-section of the clearance hole 180 is greater than the cross-section of the limiting block 412. The hole axis of the clearance hole 180 is parallel to the rotation axis of the partition 400. One end of the arc-shaped guide groove 170 extends through to the clearance hole 180.

[0050] When installing the partition 400, align the lever portion 410 with the clearance hole 180, and then insert the partition 400 into the housing 100 along the rotation axis. This allows the lever portion 410 to pass through the clearance hole 180. When the partition 400 is fully inserted, the connecting block 411 is located within the clearance hole 180, and the limiting block 412 protrudes from the clearance hole 180. The partition 400 can then be rotated, causing the connecting block 411 of the lever portion 410 to enter the arc-shaped guide groove 170, completing the assembly of the partition 400. At this time, the limiting block 412 also restricts the position of the partition 400, making the rotational insertion of the partition 400 and the housing 100 more stable. The aforementioned partition 400 has a compact structure and a relatively ingenious installation method, reducing the number of parts.

[0051] Specifically, the partition 400 is also integrally formed with a rotating shaft, and the housing 100 is provided with a rotating groove, in which the rotating shaft is rotatably inserted.

[0052] In the embodiment, reference Figure 7The main body 200 of the fan includes a centrifugal impeller 210 and a motor 220. The motor 220 is disposed in the housing 100 and is used to drive the centrifugal impeller 210 to rotate. The outer periphery of the centrifugal impeller 210 is opposite to the inner exhaust duct 130. One end of the centrifugal impeller 210 along its rotation axis is opposite to the air inlet 120. Multiple fan blades 211 are arranged around the centrifugal impeller 210. The fan blades 211 extend along the rotation axis of the centrifugal impeller 210. The cross-section of the fan blades 211 is arc-shaped. An air flow channel 212 is formed between two adjacent fan blades 211.

[0053] When the motor 220 drives the centrifugal impeller 210 to rotate, the centrifugal impeller 210 can draw air from the air inlet 120 and blow the airflow out from the outer periphery. The airflow is then guided into the inner exhaust duct 130 or the outer exhaust duct 160 through the fan chamber 110. The fan blades 211 of the centrifugal impeller 210 are arc-shaped, which helps to extend the length of the airflow channel 212 between two adjacent fan blades 211. This allows the centrifugal impeller 210 to extend the distance and time of work done on the air when it rotates, thereby increasing the speed and flow rate of the blown airflow.

[0054] In the embodiments, reference is made to Figure 7 The inner arc side of the fan blade 211 is provided with an arc-shaped groove 213 so that the thickness of the fan blade 211 tends to increase in the radial outward direction along the centrifugal impeller 210. This changes the angle of the side of the fan blade 211 that does work on the air, which can more significantly promote the air flow, resulting in a faster airflow speed and a larger air volume.

[0055] Specifically, because the inner arc side of the fan blade 211 is provided with an arc-shaped groove 213, the width of the air flow channel 212 also tends to decrease in the radial outward direction along the centrifugal impeller 210.

[0056] Specifically, the first mounting frame 310 has a mounting groove 312, the filter element 311 is plate-shaped and embedded in the mounting groove 312, the bottom wall of the mounting groove 312 is hollow, and a stop block 313 is provided around the groove opening of the mounting groove 312. The stop block 313 abuts against the filter element 311, making the assembly structure of the filter element 311 and the first mounting frame 310 relatively simple and reliable.

[0057] Specifically, the centrifugal impeller 210 is wrapped around the outer periphery of the motor 220, making the structure of both relatively compact and conducive to the flattening of the fan body 200.

[0058] Specifically, the partition 400 is integrally formed with a stop protrusion 420, and the housing 100 has two stop grooves around the rotation axis of the partition 400. The stop protrusion 420 can engage or disengage from the stop groove, so that when the partition 400 rotates to a predetermined angle position, the stop protrusion 420 engages with the stop groove, which can serve to initially position the partition 400. When a larger force is applied to rotate the partition 400, the stop protrusion 420 can disengage from the stop groove, causing the partition 400 to rotate.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A volute-type fan, characterized in that, include: The housing (100) is provided with a fan cavity (110), an air inlet (120) and an internal exhaust duct (130). The air inlet (120) is connected to the fan cavity (110), and the internal exhaust duct (130) is connected to the fan cavity (110). The outer wall of the housing (100) is provided with a mounting hole (140), which extends through to the internal exhaust duct (130). The fan body (200) is disposed in the housing (100) and located in the fan cavity (110), and the fan body (200) can generate airflow from the air inlet (120) to the internal exhaust duct (130); A mounting bracket (300) is detachably inserted into the mounting hole (140). The mounting bracket (300) can be configured as a first mounting bracket (310), which is provided with a filter element (311) located in the internal exhaust duct (130).

2. The volute fan according to claim 1, characterized in that: The mounting bracket (300) is provided with a snap-fit ​​part (301), and the housing (100) is provided with a snap-fit ​​mating part (150), and the snap-fit ​​part (301) and the snap-fit ​​mating part (150) are snap-fit ​​mating.

3. The volute fan according to claim 1, characterized in that: The filter element (311) is an activated carbon filter mesh.

4. The volute fan according to claim 1, characterized in that: The mounting bracket (300) has a handle (302) on the side opposite to the internal exhaust duct (130).

5. The volute fan according to claim 1, characterized in that: It also includes a partition (400), and the housing (100) is also provided with an external exhaust duct (160), which is connected to the fan cavity (110). The fan body (200) can form an airflow from the air inlet (120) to the external exhaust duct (160). The partition (400) is rotatably mounted on the housing (100) and can be rotated to open or close the internal exhaust duct (130).

6. The volute fan according to claim 5, characterized in that: The mounting bracket (300) blocks the mounting hole (140), and the mounting bracket (300) can be configured as a second mounting bracket (320) that avoids the internal exhaust duct (130).

7. The volute fan according to claim 5, characterized in that: The partition (400) is integrally formed with a lever portion (410), and the housing (100) is provided with an arc-shaped guide groove (170) around the rotation axis of the partition (400). The lever portion (410) passes through the arc-shaped guide groove (170) and is exposed outside the housing (100).

8. The volute fan according to claim 7, characterized in that: The partition (400) is rotatably inserted into the housing (100) along its rotation axis. The lever (410) includes a connecting block (411) and a limiting block (412). The connecting block (411) is located in the arc-shaped guide groove (170). The width of the limiting block (412) is greater than the width of the arc-shaped guide groove (170). The limiting block (412) is connected to the end of the connecting block (411) away from the internal exhaust duct (130) and exposed in the housing (100). The housing (100) is provided with a clearance hole (180). The cross-section of the clearance hole (180) is greater than the cross-section of the limiting block (412). The hole axis of the clearance hole (180) is parallel to the rotation axis of the partition (400). One end of the arc-shaped guide groove (170) extends through the clearance hole (180).

9. The volute fan according to claim 1, characterized in that: The main body (200) of the fan includes a centrifugal impeller (210) and a motor (220). The motor (220) is disposed in the housing (100) and is used to drive the centrifugal impeller (210) to rotate. The outer periphery of the centrifugal impeller (210) is opposite to the inner exhaust duct (130). One end of the centrifugal impeller (210) along its rotation axis is opposite to the air inlet (120). The centrifugal impeller (210) has a plurality of fan blades (211) arranged around its rotation axis. The fan blades (211) extend along the rotation axis of the centrifugal impeller (210). The cross-section of the fan blades (211) is arc-shaped. An air flow channel (212) is formed between two adjacent fan blades (211).

10. The volute fan according to claim 9, characterized in that: The inner arc side of the fan blade (211) is provided with an arc-shaped groove (213) so that the thickness of the fan blade (211) tends to increase in the radial outward direction along the centrifugal impeller (210).

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