Power device and air draft device with same
The dynamic power system for range hoods addresses sealing issues by integrating oil drainage channels, enhancing both efficiency and cleanliness by preventing oil leakage.
Patent Information
- Application Number
- CN202422138108.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Existing range hoods suffer from poor sealing between the turbine module and the box body, leading to reduced suction power and oil leakage, which affects both the efficiency and cleanliness of the kitchen environment.
A dynamic power system for range hoods that includes a box body with a container cavity, a turbine chamber with a sealed connection between the bottom plate and a lower cover plate, and a wind outlet and inlet system with integrated oil drainage channels to prevent oil leakage and improve sealing.
The solution ensures better sealing and efficient smoke extraction while preventing oil from leaking onto the kitchen surface, maintaining cleanliness and appearance.
Smart Images
Figure CN223104810U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of range hoods, and particularly to a power device and an exhaust device with the same. Background Art
[0002] The existing range hood is arranged above the kitchen stove and is used to extract and discharge the oil fume generated during the cooking process when the user cooks food. In the related art, the ventilator includes a box body and a turbine module installed therein. The turbine module is connected to the external pipeline through an air inlet joint and an air outlet joint. Affected by the assembly process, the assembly sealing performance between the air inlet joint and the air outlet joint and the turbine module is poor, resulting in easy fluid communication between the inside of the turbine module and the inner cavity of the box body, affecting the negative pressure generated on the air inlet side of the turbine module, and further affecting the smoke exhaust capacity of the ventilator.
[0003] When the range hood works, the fan starts and sucks the oil fume into the air cavity. However, during long-term use, the waste oil accumulated by the oil fume will fall from the oil dripping hole of the smoke exhaust fan, and some waste oil will also flow downward along the inner wall surface of the air collecting box assembly. Since the air collecting box assembly is assembled by multiple components, the waste oil easily seeps out from the connection gaps of each component of the air collecting box assembly, continues to flow downward along the outer surface of the panel, and drips onto the stove top, which not only affects the beauty of the range hood but also affects the sanitary condition of the kitchen. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a power device and an exhaust device with the same, which are used to solve the above technical problems.
[0005] A power device for an exhaust device includes a box body having an accommodation cavity, and a first through hole is provided on the bottom plate of the accommodation cavity; a volute including a surrounding plate and a lower cover plate, a second through hole is provided on the lower cover plate, a ring wall extends downward from the edge of the second through hole, the lower cover plate is connected to the bottom plate of the accommodation cavity, the ring wall extends out of the accommodation cavity through the first through hole, the surrounding plate is connected to the top plate of the accommodation cavity and encloses a turbine cavity; an air outlet joint connected to the air outlet end of the volute and communicating with the turbine cavity, and the air outlet joint extends out of the accommodation cavity; an air inlet joint including a pipe body and a connecting part, the connecting part is connected to the bottom plate of the box body, a first oil guiding groove is provided thereon around the pipe body, a first oil guiding hole communicating the first oil guiding groove and the inside of the pipe body is provided on the part of the pipe body corresponding to the first oil guiding groove, and the ring wall extends into the first oil guiding groove; a turbine assembly disposed in the turbine cavity and connected to the top plate of the box body.
[0006] According to an embodiment of the utility model, the air outlet joint has an oil guiding surface, and the oil guiding surface is inclined downward from the end far away from the box body to the end close to the box body.
[0007] According to an embodiment of the present utility model, one end of the air outlet joint away from the box body is an air outlet connection end for connecting with an external pipeline. The air outlet connection end is of a double-layer structure, and a first connection groove is formed between the outer layer and the inner layer. The external pipeline is connected in the first connection groove, and a second oil guide hole communicating with the oil guide surface is provided at the lowest position of the first connection groove.
[0008] According to an embodiment of the present utility model, a second oil guide groove is provided at the lowest position of the oil guide surface, and the second oil guide hole communicates with the second oil guide groove.
[0009] According to an embodiment of the present utility model, the part of the pipe body extending upward from the connection part forms an air outlet end, the part of the pipe body extending downward from the connection part forms an air inlet end, the connection part is connected to the bottom plate of the box body, and the air outlet end extends into the turbine cavity through the second through hole.
[0010] According to an embodiment of the present utility model, the air inlet end of the air inlet joint is of a double-layer structure, and a second connection groove is formed between the outer layer and the inner layer of the air inlet end. The second connection groove is used for connecting a connection pipe connected to the air collecting component of the air extraction device, and the first oil guide hole communicates with the pipeline defined by the inner layer of the air inlet end.
[0011] According to an embodiment of the present utility model, the same connecting piece sequentially passes through the connection part, the bottom plate of the accommodating cavity and the lower cover plate to connect the connection part and the lower cover plate with the bottom plate of the accommodating cavity, and sealing members are provided between the connection part and the bottom plate of the accommodating cavity and between the bottom plate of the accommodating cavity and the lower cover plate.
[0012] According to an embodiment of the present utility model, the hole where the lower cover plate is connected to the accommodating cavity is a blind hole, and a connecting column is provided on the lower cover plate, and the blind hole is provided on the connecting column.
[0013] According to an embodiment of the present utility model, it includes an air collecting component, the air collecting component has an air collecting cavity and an air suction port and an air outlet communicating with the air collecting cavity, and the air outlet is connected to the air inlet joint through a connection pipe.
[0014] According to an embodiment of the present utility model, the turbine cavity, the first oil guide groove, the first oil guide hole, the inside of the pipe body and the inside of the connection pipe are sequentially communicated.
[0015] Compared with the prior art, the power device of the present utility model has the following advantages:
[0016] When the power device of the present utility model is applied to a range hood, while ensuring the sealing performance between the volute and the box body and ensuring the smoke exhaust effect of the turbine component, when the range hood stops working, the oil stains attached to the inner wall of the turbine cavity can flow along the inner wall of the baffle into the first oil guide groove, and then be discharged from the pipe body of the air outlet joint through the first oil guide hole, avoiding the oil stains from seeping out from the connection gap between the volute and the air outlet joint, which can keep the air extraction device beautiful and can also improve the sanitary condition of the kitchen. Description of the Drawings
[0017] Figure 1 This is a schematic structural diagram of the power device of the present utility model;
[0018] Figure 2 This is an exploded view of the structure of the power device of the present utility model;
[0019] Figure 3 This is a schematic structural diagram of the air inlet joint in the power device of the present utility model;
[0020] Figure 4 This is a cross-sectional view of the structure of the power device of the present utility model;
[0021] Figure 5 This is a schematic structural diagram of a range hood having the power device of the present utility model.
[0022] In the figure: 1. Box body, 11. Accommodating cavity, 111. First through hole, 2. Volute, 21. Enclosing plate, 22. Lower cover plate, 221. Second through hole, 222. Ring wall, 223. Connecting column, 3. Air outlet joint, 31. Air outlet connection end, 311. Second oil guiding hole, 32. Second oil guiding groove, 4. Air inlet joint, 41. Pipe body, 411. First oil guiding hole, 42. Connecting portion, 421. First oil guiding groove, 5. Turbine assembly, 6. Air collecting assembly, 7. Connecting pipe.
[0023] The realization and advantages of the functions of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0024] The following will disclose multiple embodiments of the present utility model with diagrams. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some well-known and commonly used structures and components will be shown in a simple schematic manner in the diagrams.
[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.
[0026] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and do not particularly refer to the order or sequence. Nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0027] To further understand the content, features and effects of the present utility model, the following embodiments are exemplified and described in detail with reference to the accompanying drawings as follows:
[0028] The present utility model discloses a power device for an air extraction device. Please refer to Figure 1 and Figure 2 The power device includes a box body 1, a volute 2, an air outlet joint 3, an air inlet joint 4 and a turbine assembly 5. Among them, the box body 1 has a receiving cavity 11, and a first through hole 111 is provided on the bottom plate of the receiving cavity 11; the volute 2 includes a surrounding plate 21 and a lower cover plate 22. A second through hole 221 is provided on the lower cover plate 22, and a ring wall 222 extends downward from the edge of the second through hole 221. The lower cover plate 22 is connected to the bottom plate of the receiving cavity 11, and the ring wall 222 extends out of the receiving cavity 11 through the first through hole 111. The surrounding plate 21 is connected to the top plate of the receiving cavity 11 and encloses a turbine cavity; the air outlet joint 3 is connected to the air outlet end of the volute 2 and communicates with the turbine cavity. The air outlet joint 3 extends out of the receiving cavity 11 and can be used to connect to an external pipeline so that the air flow in the turbine cavity can flow to the external pipeline through the air outlet joint 3. The air inlet joint 4 includes a pipe body 41 and a connecting portion 42. The connecting portion 42 is connected to the bottom plate of the box body 1, and a first oil guide groove 421 is provided thereon around the pipe body 41. A first oil guide hole 411 communicating the first oil guide groove 421 and the inside of the pipe body 41 is provided on the portion of the pipe body 41 corresponding to the first oil guide groove 421. The ring wall 222 extends into the first oil guide groove 421; the turbine assembly 5 is arranged in the turbine cavity and is connected to the top plate of the box body 1.
[0029] The power device of the present utility model, the lower cover plate 22 of the volute 2 is hermetically connected to the bottom plate of the accommodating cavity 11. The second through hole 221 on the lower cover plate 22 is coaxially arranged with the first through hole 111 on the bottom plate of the accommodating cavity 11. The outer peripheral wall of the annular wall 222 is in contact with the inner peripheral wall of the first through hole 111 and extends out of the accommodating cavity 11 through the first through hole 111, ensuring the sealing performance between the volute 2 and the accommodating cavity 11. At the same time, the annular wall 222 extends into the first through hole 111, which can prevent the air inlet joint 4 from shifting, so as to ensure that the axes of the air inlet joint 4, the first through hole 111 and the second through hole 221 coincide. The connecting portion 42 of the air inlet joint 4 and the bottom plate of the box body 1 are fixedly connected together by means of screws or welding, etc. And a first oil guide groove 421 arranged in a ring shape is provided on the side of the connecting portion 42 facing the annular wall 222. The annular wall 222 extends into the first oil guide groove. When applied to an exhaust device, such as a range hood, a turbine assembly 5 is installed in the turbine cavity of the power device. When the range hood operates, the turbine assembly 5 operates, and the oil fume enters the turbine cavity successively through the flow channel formed by enclosing the pipe body 41 of the air inlet joint 4 and the annular wall 222 of the lower cover plate 22, and is discharged from the turbine cavity through the air outlet joint 3 communicated with the turbine cavity. The part of the connecting portion 42 connected to the lower cover plate 22 is arranged in a plane, which increases the contact area and connection stability between the lower cover plate 22 and the connecting portion 42, has good sealing performance, and the oil fume entering the turbine cavity will not diffuse from the connection part of the box body 1 and the air outlet joint 3 to the outside of the box body 1. The power device will not leak smoke, and the negative pressure formed by the turbine assembly 5 in the turbine cavity will not weaken, which can ensure the smoke exhaust effect of the turbine assembly 5.
[0030] When the power device of the present utility model is applied to a range hood, a turbine assembly 5 is installed in the turbine chamber of the power box assembly. When the turbine assembly 5 operates and sucks oil fume into the turbine chamber, the mixture of oil and water in the oil fume will be thrown to the inner wall surface of the turbine chamber under the action of centrifugal force. When the turbine assembly 5 stops operating, these mixtures of oil and water will flow downward along the inner wall surface of the turbine chamber, then flow downward along the edge of the second through hole 221 on the lower cover plate 22, and flow downward along the inner wall surface of the annular wall 222 and converge into the first oil guide groove 421, and then flow out from the inside of the pipe body 41 through the first oil guide hole 411. It can be understood that in order to improve the derivation efficiency of the mixture of oil and water discharged from the first oil guide groove 421, the first oil guide holes 411 can be provided in multiple numbers, and the multiple first oil guide holes 411 are arranged at intervals along the circumferential direction of the first oil guide groove 421. The size of the second through hole 221 on the lower cover plate 22 is made smaller than the size of the first through hole 111, so that the mixture of oil and water flowing downward along the edge of the second through hole 221 on the lower cover plate 22 will not enter the accommodation cavity 11 through the gap between the lower cover plate 22 and the bottom plate of the accommodation cavity 11, and will not leak from the connection between the air outlet joint 3 and the box body 1, and the sealing performance is better. In the power device of the present utility model, the volute 2 is an injection molded part, and the surrounding plate 21 and the lower cover plate 22 are integrally injection molded. Compared with the traditional welding process, the injection molding process is simple, and the joint between the lower edge of the surrounding plate 21 and the outer edge of the lower cover plate 22 has good sealing performance, improving the sealing performance of the volute 2 itself and preventing smoke leakage.
[0031] For the power device of the present utility model, please refer to Figure 1 and Figure 2 , the air outlet joint 3 has an oil guiding surface, and the oil guiding surface is inclined downward from the end far away from the box body 1 to the end close to the box body 1. The inclination angle of the oil guiding surface can be set according to the actual use situation and is not limited here. When the turbine assembly 5 stops operating, the mixture of oil and water at the air outlet joint 3 will slide down along the oil guiding surface under the action of its own gravity into the turbine chamber, and then further flow into the first oil guide groove 421 through the annular wall 222, preventing the mixture of oil and water from accumulating at the air outlet joint 3. At the same time, setting the oil guiding surface facilitates the sliding of the mixture of oil and water on the air outlet joint 3, improving the guiding ability, enabling the mixture of oil and water in the turbine chamber to be discharged along the specified route, and preventing the mixture of oil and water from accumulating in the turbine chamber when the turbine assembly 5 stops operating.
[0032] For the power device of the present utility model, please refer to Figure 1 and Figure 2, one end of the air outlet joint 3 away from the box body 1 is an air outlet connection end 31 for connecting with an external pipeline. The air outlet connection end 31 has a double-layer structure, and a first connection groove is formed between the outer layer and the inner layer. The external pipeline is connected in the first connection groove, and a second oil guiding hole 311 communicating with the oil guiding surface is provided at the lowest position of the first connection groove. When the external pipeline is connected to the air outlet joint 3, the inner and outer sides of the external pipeline are respectively abutted against the peripheral walls of the outer layer and the inner layer, achieving a double sealing effect, with a better sealing effect, improving the sealing performance of the connection section between the external pipeline and the air outlet, and preventing smoke leakage. And when the turbine assembly 5 stops operating, the mixture of oil and water in the external pipeline enters the first connection groove along the inner wall of the external pipeline, converges at the lowest position of the first connection groove under the action of its own gravity, and is guided to the oil guiding surface through the second oil guiding hole 311, realizing the guidance of the mixture of oil and water in the external pipeline, and preventing the mixture of oil and water from seeping out from the connection between the air outlet connection end 31 and the external pipeline.
[0033] For the power device of the present utility model, please refer to Figure 1 and Figure 2 , a second oil guiding groove 32 is provided at the lowest position of the oil guiding surface, and the second oil guiding hole 311 communicates with the second oil guiding groove 32. When the turbine assembly 5 stops operating, the oil liquid formed in the external pipeline will gather in the first connection groove. The oil liquid gathered in the first connection groove enters the second oil guiding groove 32 through the second oil guiding hole 311, flows along the second oil guiding groove 32 and enters the volute. The mixture of oil and water in the air outlet joint 3 will also gather at the second oil guiding groove 32, flow out from the second oil guiding groove 32 to the oil guiding surface, and then be guided by the oil guiding surface to the lower cover plate 22 of the volute 2, and be guided into the first oil guiding groove 421 by the annular wall 222 on the lower cover plate 22, and finally be introduced into the interior of the pipe body 41 through the first oil guiding hole 411 communicating with the first oil guiding groove 421 and the inner wall of the pipe body 41, so that the oil liquid finally flows along the inner wall of the pipe body 41.
[0034] For the power device of the present utility model, please refer to Figure 1 and Figure 2, the part of the pipe body 41 extending upward from the connecting part 42 forms the air outlet end, and the part of the pipe body 41 extending downward from the connecting part 42 forms the air inlet end. The connecting part 42 is connected to the bottom plate of the box body 1, and the air outlet end extends into the turbine chamber through the second through hole 221. The air outlet end extends upward from the connecting part 42, and the height of the upper edge of the air outlet end is higher than the height of the upper surface of the connecting part 42. The first oil guide groove 421 is provided on the connecting part 42, and the inner side wall surface of the first oil guide groove 421 is formed by the air outlet end. After the connecting part 42 is connected to the bottom plate of the box body 1, the air outlet end extends upward and is higher than the upper surface of the connecting part 42, which can prevent the oil in the first oil guide groove 421 from overflowing into the pipe body 41 when there is too much oil. In addition, the air outlet end directly extends into the turbine chamber and is close to the air suction end of the turbine assembly 5, and the oil fume discharged through the pipe body 41 can be directly discharged from the turbine chamber by the turbine assembly 5, which can improve the smoke exhaust efficiency of the turbine assembly 5. The air inlet end is provided on the lower surface of the connecting part 42. When applied to the air extraction device, the air inlet end is used to connect with the connecting pipe of the connecting air collecting assembly. When the air extraction device is started, the turbine assembly 5 works, a negative pressure is formed in the air collecting assembly, the external oil fume is sucked by the air collecting assembly, then discharged from the smoke outlet of the air collecting assembly and flows along the connecting pipe, enters the pipe body 41 through the connecting pipe, enters the turbine chamber through the air outlet end of the pipe body 41, and is finally discharged by the turbine assembly 5.
[0035] For the power device of the present utility model, please refer to Figure 1 and Figure 2 , the air inlet end of the air inlet joint 4 is a double-layer structure, and a second connection groove is formed between the outer layer and the inner layer of the air inlet end. The second connection groove is used to connect the connecting pipe 7 connected to the air collecting assembly 6 of the air extraction device, and the first oil guide hole 411 is communicated with the pipeline defined by the inner layer of the air inlet end. When applied to the air extraction device, the connecting pipe connects the air outlet end of the air collecting assembly with the air inlet end of the air collecting port joint, and the connecting pipe is sleeved in the second connection groove. At this time, the inner and outer sides of the air inlet pipeline are respectively abutted against the peripheral walls of the outer layer and the inner layer, and the inner layer is located inside the connecting pipe. When the oil in the turbine chamber flows out through the pipe body 41, it directly enters the connecting pipe, avoiding oil overflow at the connection between the connecting pipe and the air inlet end.
[0036] For the power device of the present utility model, please refer to Figure 1 and Figure 2, the same connecting member sequentially passes through the connecting portion 42, the bottom plate of the accommodating cavity 11 and the lower cover plate 22 to connect the connecting portion 42 and the lower cover plate 22 to the bottom plate of the accommodating cavity 11, and a sealing member is provided between the connecting portion 42 and the bottom plate of the accommodating cavity 11 and between the bottom plate of the accommodating cavity 11 and the lower cover plate 22. The sealing member can be sealing cotton or other sealing materials that can be deformed after being extruded. The sealing member can fill and seal the gap between the bottom plate of the box body 1 and the lower cover plate 22, thereby improving the connection sealing effect between the bottom plate of the box body 1 and the connecting portion 42. At the same time, the sealing member can also fill and seal the gap between the bottom plate of the accommodating cavity 11 and the lower cover plate 22, thereby improving the connection sealing effect between the bottom plate of the box body 1 and the air inlet joint 4. By fixing the air inlet joint 4 to the bottom plate of the box body 1 through the connecting portion 42, the connection area between the air outlet joint 3 and the bottom plate of the box body 1 can be increased, so that there is enough area between the bottom plate of the box body 1 and the connecting portion 42 to set the sealing member, further improving the connection tightness between the box body 1 and the air inlet joint 4.
[0037] For the power device of the present utility model, please refer to Figure 1 and Figure 2 , the hole where the lower cover plate 22 is connected to the accommodating cavity 11 is a blind hole, and a connecting column 223 is provided on the lower cover plate 22, and the blind hole is provided on the connecting column 223. Among them, a blind hole is provided on the connecting column 223, a first connecting hole is provided on the bottom plate of the box body 1, and a second connecting hole is provided on the connecting portion 42. The connecting member sequentially passes through the second connecting hole, the first connecting hole and the blind hole to hermetically connect the air inlet joint 4 and the lower cover plate 22 to the bottom plate of the box body 1. In this embodiment, the connecting member is a screw, and the inner wall of the blind hole is provided with internal threads. The screw sequentially passes through the second connecting hole, the first connecting hole and the blind hole for threaded cooperation, which can simplify the fixing method of the screw and the blind hole. The blind hole is not communicated with the turbine cavity, so the turbine cavity and the accommodating cavity 11 will not have air flow communication through the blind hole. The head of the screw can seal the first connecting hole and the second connecting hole, so the turbine cavity will not have air flow communication with the outside through the first connecting hole and the second connecting hole. In this way, the sealing effect after the bottom plate of the box body 1 is connected to the lower cover plate 22 and the first connecting portion 42 can be ensured.
[0038] It can be understood that the connecting column 223 can make the blind hole have sufficient depth and width to improve the cooperation stability between the screw and the blind hole; by providing the connecting column 223 for the blind hole to be formed, other parts of the connecting portion 42 can be kept in a thin-wall shape, so that the structure of the air outlet joint 3 is simpler and lighter.
[0039] Please refer to Figure 5, the present utility model also provides an exhaust device, which adopts the above-mentioned power device and includes a wind collecting component 6. The wind collecting component 6 has a wind collecting cavity, an air suction port and an air outlet communicated with the wind collecting cavity. The air outlet is connected to the air inlet joint 4 through a connecting pipe 7. When the exhaust device is started, the turbine component 5 is started, and a negative pressure is formed in the wind collecting cavity of the wind collecting component 6 through the connecting pipe 7. External oil fume enters the wind collecting cavity through the air suction port on the wind collecting component 6, and then is discharged into the connecting pipe 7 from the air outlet of the wind collecting component 6. The oil fume flows along the connecting pipe 7 and is connected to the turbine cavity through the air inlet joint 4 connected to the air outlet end of the connecting pipe 7. Under the action of the turbine component 5, it is discharged into the smoke pipe communicated with the external flue through the air outlet joint 3, then flows along the smoke pipe and is discharged into the external flue.
[0040] Please refer to Figure 5 , for the exhaust device of the present utility model, the turbine cavity, the first oil guiding groove 421, the first oil guiding hole 411, the inside of the pipe body 41 and the inside of the connecting pipe 7 are communicated in sequence. When the turbine component 5 stops operating, the oil liquid formed in the external pipeline will gather in the first connecting groove. The oil liquid gathered in the first connecting groove enters the second oil guiding groove 32 through the second oil guiding hole 311, flows along the second oil guiding groove 32 and enters the volute 2. The mixture of oil and water in the volute 2 finally flows to the lower cover plate 22, then flows downward along the edge of the second through hole 221 on the lower cover plate 22, and flows downward along the inner wall surface of the annular wall 222 and converges into the first oil guiding groove 421. The mixture of oil and water in the first oil guiding groove 421 is introduced into the pipe body 41 through the first oil guiding hole 411, flows along the inner wall surface of the pipe body 41, then enters the connecting pipe 7, and finally is discharged into the wind collecting component 6 by the connecting pipe 7, and then is discharged from the oil guiding hole at the bottom of the wind collecting component 6 and collected by the oil cup connected to the wind collecting component 6.
[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.
Claims
1. A power device for an air extraction device, characterized in that, Comprising: A box body (1) having a receiving cavity (11), and a first through hole (111) is provided on the bottom plate of the receiving cavity (11); A volute (2) including a surrounding plate (21) and a lower cover plate (22), a second through hole (221) is provided on the lower cover plate (22), a ring wall (222) extends downward from the edge of the second through hole (221), the lower cover plate (22) is connected to the bottom plate of the receiving cavity (11), the ring wall (222) extends out of the receiving cavity (11) through the first through hole (111), and the surrounding plate (21) is connected to the top plate of the receiving cavity (11) and encloses a turbine cavity; An air outlet joint (3) connected to the air outlet end of the volute (2) and communicating with the turbine cavity, and the air outlet joint (3) extends out of the receiving cavity (11); An air inlet joint (4) including a pipe body (41) and a connecting portion (42), the connecting portion (42) is connected to the bottom plate of the box body (1), a first oil guiding groove (421) is provided thereon around the pipe body (41), a first oil guiding hole (411) communicating the first oil guiding groove (421) and the inside of the pipe body (41) is provided on the portion of the pipe body (41) corresponding to the first oil guiding groove (421), and the ring wall (222) extends into the first oil guiding groove (421); A turbine assembly (5) disposed in the turbine cavity and connected to the top plate of the box body (1).
2. The power device according to claim 1, characterized in that, The air outlet joint (3) has an oil guiding surface which is inclined downward from the end far from the box body (1) to the end close to the box body (1).
3. The power device according to claim 2, wherein, The end of the air outlet joint (3) far from the box body (1) is an air outlet connection end (31) for connecting to an external pipeline, the air outlet connection end (31) is a double-layer structure, a first connection groove is formed between the outer layer and the inner layer, and the external pipeline is connected in the first connection groove, and a second oil guiding hole (311) communicating with the oil guiding surface is provided at the lowest position of the first connection groove.
4. The power device according to claim 3, characterized in that, A second oil guiding groove (32) is provided at the lowest position of the oil guiding surface, and the second oil guiding hole (311) communicates with the second oil guiding groove (32).
5. The power device according to claim 1, characterized in that, The portion of the pipe body (41) extending upward out of the connecting portion (42) forms an air outlet end, the portion of the pipe body (41) extending downward out of the connecting portion (42) forms an air inlet end, the connecting portion (42) is connected to the bottom plate of the box body (1), and the air outlet end extends into the turbine cavity through the second through hole (221).
6. The power device according to claim 5, characterized in that, The air inlet end of the air inlet joint (4) is a double-layer structure, a second connection groove is formed between the outer layer and the inner layer of the air inlet end, the second connection groove is used for connecting a connecting pipe connected to a wind collecting assembly of an air extraction device, and the first oil guiding hole (411) communicates with the pipeline defined by the inner layer of the air inlet end.
7. The power device according to claim 1, wherein The same connecting piece sequentially passes through the connecting part (42), the bottom plate of the accommodating cavity (11) and the lower cover plate (22) to connect the connecting part (42) and the lower cover plate (22) to the bottom plate of the accommodating cavity (11), and sealing elements are provided between the connecting part (42) and the bottom plate of the accommodating cavity (11) and between the bottom plate of the accommodating cavity (11) and the lower cover plate (22).
8. The power device according to claim 7, characterized in that, The hole through which the lower cover plate (22) is connected to the accommodating cavity (11) is a blind hole, and a connecting column (223) is provided on the lower cover plate (22), and the blind hole is provided on the connecting column (223).
9. An exhaust device using the power device according to any one of claims 1 to 8, characterized in that, It includes an air collecting assembly (6), the air collecting assembly (6) has an air collecting cavity and an air suction port and an air outlet communicated with the air collecting cavity, and the air outlet is connected to the air inlet joint (4) through a connecting pipe (7).
10. The exhaust device according to claim 9, characterized in that, The turbine cavity, the first oil guiding groove (421), the first oil guiding hole (411), the inside of the pipe body (41) and the inside of the connecting pipe (7) are sequentially communicated.