Power device and range hood with same

Abstract

The utility model discloses a power device and a range hood with the same. The power device comprises a box body, a volute, an air inlet connector and a turbine assembly. The box body is provided with a containing cavity, a first through hole is formed in a bottom plate of the containing cavity, and an outlet is formed in a side plate on one side of the containing cavity; the volute is arranged in the containing cavity and comprises a surrounding plate, a lower cover plate and an air outlet connector, the lower cover plate, the air outlet connector and the surrounding plate are integrally formed, the air outlet connector extends out of the box body through the outlet, a turbine cavity is defined by a top plate of the box body and the volute, the turbine cavity is not communicated with the containing cavity through fluid, and the turbine cavity is communicated with the outside through the air outlet connector. The air inlet connector is arranged on the lower surface of the box body, a fourth connecting part is arranged on the air inlet connector, and the connecting piece sequentially penetrates through the fourth connecting part, the bottom plate of the box body and the second connecting part to connect the air inlet connector and the lower cover plate with the bottom plate of the box body; the turbine assembly is arranged in the volute and connected with the top plate of the box body. The power device can improve the smoke exhaust effect when the power device is applied to the range hood.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and in particular to a power device and a range hood having the same. Background Art

[0002] A ventilator used as a relay device for a range hood has the function of assisting the range hood in exhausting oil fumes. It is usually installed at the upper end of the range hood and is located in a cabinet or a kitchen ceiling. In the related art, the ventilator includes a box body and a turbine module installed therein. The turbine module is connected to an 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. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a power device and a range hood having the same, which are used to solve the above technical problems.

[0004] A power device for a range hood includes a box body, a volute, an air inlet joint and a turbine assembly; the box body has a receiving cavity, a first through hole is provided on the bottom plate of the receiving cavity, and an outlet is provided on one side side plate of the receiving cavity; the volute is arranged in the receiving cavity, and the volute includes a surrounding plate, a lower cover plate and an air outlet joint. The lower cover plate and the air outlet joint are integrally formed with the surrounding plate. A first connecting portion is provided on the upper edge of the surrounding plate, a second connecting portion and a second through hole are provided on the lower cover plate, and the size of the second through hole is smaller than that of the first through hole. The air outlet joint extends out of the box body through the outlet, and a third connecting portion is provided on the front edge of the air outlet joint. The first connecting portion and the third connecting portion are hermetically connected to the top plate of the box body. The top plate of the box body and the volute enclose a turbine cavity, and there is no fluid communication between the turbine cavity and the receiving cavity. The turbine cavity is communicated with the outside through the air outlet joint; the air inlet joint is arranged on the lower surface of the box body, a fourth connecting portion is provided on the air inlet joint, and a connecting member sequentially passes through the fourth connecting portion, the bottom plate of the box body and the second connecting portion to connect the air inlet joint and the lower cover plate to the bottom plate of the box body, and makes the axes of the first through hole, the second through hole and the air inlet joint coincide; the turbine assembly is arranged in the volute and connected to the top plate of the box body.

[0005] According to an embodiment of the utility model, a first blind hole is provided on the first connecting portion, a second blind hole is provided on the third connecting portion, a first connecting hole corresponding to the first blind hole and a second connecting hole corresponding to the second blind hole are provided on the top plate of the box body, and screws sequentially pass through the first connecting hole and the first blind hole to hermetically connect the top plate of the box body and the surrounding plate, and the screws sequentially pass through the second connecting hole and the second blind hole to hermetically connect the top plate of the box body and the air outlet joint.

[0006] According to an embodiment of the present utility model, a third blind hole is provided on the second connecting portion, a third connecting hole is provided on the bottom plate of the box body, a fourth connecting hole is provided on the fourth connecting portion, and a connecting member sequentially passes through the fourth connecting hole, the third connecting hole and the third blind hole to seal and connect the air inlet joint and the lower cover plate with the bottom plate of the box body.

[0007] According to an embodiment of the present utility model, a first sealing member is provided between the top plate of the box body and the first connecting portion and the third connecting portion. After the top plate of the box body is connected to the first connecting portion and the third connecting portion, the first sealing member is squeezed between the top plate of the box body and the first connecting portion and the third connecting portion, and seals the gap between the top plate of the box body and the first connecting portion and the third connecting portion.

[0008] According to an embodiment of the present utility model, a second sealing member is provided between the lower cover plate and the bottom plate of the box body, and a third sealing member is provided between the fourth connecting portion and the bottom plate of the box body. The connecting member sequentially passes through the fourth connecting portion, the bottom plate of the box body and the second connecting portion to connect the air inlet joint and the lower cover plate with the bottom plate of the box body, and squeezes the second sealing member between the lower cover plate and the bottom plate of the box body, and squeezes the third sealing member between the bottom plate of the box body and the fourth connecting portion.

[0009] According to an embodiment of the present utility model, the air outlet joint includes a lower pipe body and an upper pipe body. The lower pipe body is integrally formed with the volute. The upper pipe body and the lower pipe body are hermetically connected to the top plate of the box body, and an avoidance opening for avoiding the upper pipe body is provided on the top plate of the box body.

[0010] According to an embodiment of the present utility model, fifth connecting portions extend outward from both side edges of the lower pipe body, sixth connecting portions extend outward from both side edges of the upper pipe body, the fifth connecting portions and the sixth connecting portions are connected, a fourth sealing member is provided between them, a third connecting portion is provided at the front edge of the upper pipe body, and the third connecting portion is hermetically connected to the top plate of the box body, and a fifth sealing member is provided between them.

[0011] According to an embodiment of the present utility model, a fourth blind hole is provided on the fifth connecting portion, a fifth connecting hole is provided on the sixth connecting portion, and a screw passes through the fifth connecting hole and the fourth blind hole to seal and connect the fifth connecting portion and the sixth connecting portion.

[0012] According to an embodiment of the present utility model, the fourth connecting portion is arranged around the air outlet end of the air inlet joint, and a ring groove arranged around the air inlet joint is provided thereon. A ring wall extends downward from the edge of the second through hole of the lower cover plate. After the air inlet joint is connected to the box body, the ring wall extends into the ring groove, and the air outlet end of the air inlet joint extends into the turbine chamber through the second through hole.

[0013] A range hood using the above-mentioned power device includes a wind collecting assembly, the wind collecting assembly having a wind collecting cavity and an air suction port and an air outlet port communicating with the wind collecting cavity, and the air outlet port is connected to the air inlet joint through a connecting pipe.

[0014] Compared with the prior art, the power device of the present utility model has the following advantages:

[0015] When the power device of the present utility model is applied to a range hood, since the fluid is not connected between the turbine cavity and the accommodation cavity, the cooking fume entering the turbine cavity will not diffuse from the turbine cavity into the accommodation cavity, and the negative pressure formed by the turbine assembly in the turbine cavity will not weaken, which can ensure the smoke exhaust effect of the turbine assembly; moreover, the top plate of the box body is hermetically connected to the first connecting part and the third connecting part, and the cooking fume in the turbine cavity will not diffuse to the outside of the box body through the connection between the top plate of the box body and the first connecting part and the third connecting part, so that the power device will not leak smoke, which can ensure the negative pressure in the turbine cavity and ensure the smoke exhaust effect of the turbine assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the power device of the present utility model;

[0017] Figure 2 is a schematic structural diagram of another embodiment of the power device of the present utility model;

[0018] Figure 3 is a schematic structural diagram when the telescopic panel of the range hood with the power device of the present utility model retracts into the telescopic inner cavity;

[0019] Figure 4 is a schematic structural diagram when the telescopic panel of the range hood with the power device of the present utility model extends out of the telescopic inner cavity;

[0020] Figure 5 is a schematic structural diagram in another direction when the telescopic panel of the range hood with the power device of the present utility model extends out of the telescopic inner cavity;

[0021] In the figure: 1. Box body; 11. Accommodation cavity; 111. First through hole; 112. Outlet; 113. First connection hole; 114. Second connection hole; 115. Third connection hole; 116. Avoidance opening; 2. Volute; 21. Enclosing plate; 211. First connecting part; 2111. First blind hole; 22. Lower cover plate; 221. Second connecting part; 2211. Third blind hole; 222. Second through hole; 223. Ring wall; 23. Air outlet joint; 231. Lower pipe body; 2311. Fifth connecting part; 23111. Fourth blind hole; 232. Upper pipe body; 2321. Third connecting part; 23211. Second blind hole; 2322. Sixth connecting part; 23221. Fifth connection hole; 3. Air inlet joint; 31. Fourth connecting part; 311. Fourth connection hole; 312. Ring groove; 4. Turbine assembly; 5. Air collecting assembly; 6. Connecting pipe.

[0022] 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. Detailed implementation manners

[0023] The following will disclose multiple implementation manners of the present utility model with diagrams. For the sake of clear illustration, 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 implementation manners of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be illustrated in a simple schematic manner in the diagrams.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) 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 attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0025] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of 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 cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. 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 protection scope required by the present utility model.

[0026] 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 attached drawings as follows:

[0027] The present utility model discloses a power device for a range hood. Please refer to Figures 1 to 3, the power device includes a box body 1, a volute 2, an air inlet joint 3 and a turbine assembly 4; the box body 1 has a receiving cavity 11, a first through hole 111 is provided on the bottom plate of the receiving cavity 11, and an outlet 112 is provided on one side side plate of the receiving cavity 11; the volute 2 is arranged in the receiving cavity 11, the volute 2 includes a surrounding plate 21, a lower cover plate 22 and an air outlet joint 23, the lower cover plate 22 and the air outlet joint 23 are integrally formed with its surrounding plate 21, a first connecting portion 211 is provided on the upper edge of the surrounding plate 21, a second connecting portion 221 and a second through hole 222 are provided on the lower cover plate 22, and the size of the second through hole 222 is smaller than the size of the first through hole 111, the air outlet joint 23 extends out of the box body 1 through the outlet 112, a third connecting portion 2321 is provided on the front edge of the air outlet joint 23, and the first connecting portion 211 and the third connecting portion 2321 are hermetically connected to the top plate of the box body 1. The top plate of the box body 1 and the volute 2 enclose a turbine cavity, and the fluid between the turbine cavity and the receiving cavity 11 is not connected. The turbine cavity is communicated with the outside through the air outlet joint 23; the air inlet joint 3 is arranged on the lower surface of the box body 1, a fourth connecting portion 31 is provided on the air inlet joint 3, and a connecting member sequentially passes through the fourth connecting portion 31, the bottom plate of the box body 1 and the second connecting portion 221 to connect the air inlet joint 3 and the lower cover plate 22 to the bottom plate of the box body 1, and make the axes of the first through hole 111, the second through hole 222 and the air inlet joint 3 coincide; the turbine assembly 4 is arranged in the volute 2 and connected to the top plate of the box body 1.

[0028] In 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 receiving cavity 11, and the top plate of the box body 1 is hermetically connected to the first connecting portion 211 and the third connecting portion 2321. When it is applied to a range hood and the range hood is operating, the turbine assembly 4 operates, and the cooking fume enters the turbine cavity through the second through hole 222 on the lower cover plate 22 and is discharged from the turbine cavity through the air inlet joint 3 communicated with the turbine cavity. Since the fluid between the turbine cavity and the receiving cavity 11 is not connected, the cooking fume entering the turbine cavity will not diffuse into the receiving cavity 11 through the turbine cavity, and the negative pressure formed by the turbine assembly 4 in the turbine cavity will not be weakened, which can ensure the smoke exhaust effect of the turbine assembly 4; and the top plate of the box body 1 is hermetically connected to the first connecting portion 211 and the third connecting portion 2321, and the cooking fume in the turbine cavity will not diffuse to the outside of the box body 1 through the connection between the top plate of the box body 1 and the first connecting portion 211 and the third connecting portion 2321, and the power device will not leak smoke, which can ensure the negative pressure in the turbine cavity and ensure the smoke exhaust effect of the turbine assembly 4.

[0029] When the power device of the present utility model is applied to a range hood, when the turbine assembly 4 operates and sucks cooking fumes into the turbine cavity, the mixture of oil and water in the cooking fumes will be thrown onto the inner wall surface of the turbine cavity under the action of centrifugal force. When the turbine assembly 4 stops operating, these mixtures of oil and water will flow downward along the inner wall surface of the turbine cavity to the lower cover plate 22, and then flow downward along the edge of the second through hole 222 on the lower cover plate 22, making the size of the second through hole 222 on the lower cover plate 22 smaller than that of the first through hole 111. The mixture of oil and water flowing downward along the edge of the second through hole 222 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.

[0030] For 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 Figures 3 to 6 , a first blind hole 2111 is provided on the first connecting portion 211, a second blind hole 23211 is provided on the third connecting portion 2321, a first connecting hole 113 corresponding to the first blind hole 2111 and a second connecting hole 114 corresponding to the second blind hole 23211 are provided on the top plate of the box body 1. Screws sequentially pass through the first connecting hole 113 and the first blind hole 2111 to seal and connect the top plate of the box body 1 and the surrounding plate 21, and screws sequentially pass through the second connecting hole 114 and the second blind hole 23211 to seal and connect the top plate of the box body 1 and the air outlet joint 23.

[0032] The inner wall of the first blind hole 2111 is provided with internal threads. After the screw passes through the first connecting hole 113, it is in threaded cooperation with the first blind hole 2111, which can simplify the fixing method of the screw and the first blind hole 2111. The first blind hole 2111 is not communicated with the accommodation cavity 11, so the turbine cavity and the accommodation cavity 11 will not have air flow communication through the first blind hole 2111. The head of the screw can seal the first connecting hole 113, so the turbine cavity will not have air flow communication with the outside through the first connecting hole 113. In this way, the sealing effect after the top cover is connected to the first connecting portion 211 can be ensured.

[0033] The inner wall of the second blind hole 23211 is provided with internal threads. After the screw passes through the second connection hole 114, it is in threaded cooperation with the second blind hole 23211, which can simplify the fixing method of the screw and the second blind hole 23211. The second blind hole 23211 is not communicated with the accommodating cavity 11. Therefore, the turbine cavity and the accommodating cavity 11 will not have air flow communication through the second blind hole 23211. The head of the screw can seal the second connection hole 114. Therefore, the turbine cavity will not have air flow communication with the outside through the second connection hole 114. In this way, the sealing effect after the top cover is connected to the third connection part 2321 can be ensured.

[0034] For the power device of the present utility model, please refer to Figure 3 and 7 , a third blind hole 2211 is provided on the second connection part 221, a third connection hole 115 is provided on the bottom plate of the box body 1, a fourth connection hole 311 is provided on the fourth connection part 31, and the connecting piece sequentially passes through the fourth connection hole 311, the third connection hole 115 and the third blind hole 2211 to seal and connect the air inlet joint 3 and the lower cover plate 22 to the bottom plate of the box body 1. The inner wall of the third blind hole 2211 is provided with internal threads. After the screw sequentially passes through the fourth connection hole 311 and the third connection hole 115, it is in threaded cooperation with the third blind hole 2211, which can simplify the fixing method of the screw and the third blind hole 2211. The third blind hole 2211 is not communicated with the turbine cavity. Therefore, the turbine cavity and the accommodating cavity 11 will not have air flow communication through the third blind hole 2211. The head of the screw can seal the third connection hole 115 and the fourth connection hole 311. Therefore, the turbine cavity will not have air flow communication with the outside through the third connection hole 115 and the fourth connection hole 311. In this way, the sealing effect after the bottom plate of the box body 1 is connected to the second connection part 221 and the fourth connection part 31 can be ensured.

[0035] For the power device of the present utility model, a first sealing member is provided between the top plate of the box body 1 and the first connection part 211 and the third connection part 2321. After the top plate of the box body 1 is connected to the first connection part 211 and the third connection part 2321, the first sealing member is squeezed between the top plate of the box body 1 and the first connection part 211 and the third connection part 2321, and seals the gap between the top plate of the box body 1 and the first connection part 211 and the third connection part 2321. The first sealing member can be sealing cotton or other sealing materials that can be deformed after being squeezed. The first sealing member can fill and seal the gap between the top plate of the box body 1 and the first connection part 211 and the third connection part 2321, thereby improving the connection sealing effect between the top plate of the box body 1 and the volute 2 and the air inlet joint 3.

[0036] For the power device of the present utility model, a second seal is provided between the lower cover plate 22 and the bottom plate of the box body 1, and a third seal is provided between the fourth connecting portion 31 and the bottom plate of the box body 1. The connecting member sequentially passes through the fourth connecting portion 31, the bottom plate of the box body 1, and the second connecting portion 221 to connect the air inlet joint 3 and the lower cover plate 22 to the bottom plate of the box body 1, and squeezes the second seal between the lower cover plate 22 and the bottom plate of the box body 1, and squeezes the third seal between the bottom plate of the box body 1 and the fourth connecting portion 31. The second seal and the third seal can be sealing cotton or other sealing materials that can be deformed after being squeezed. The second seal 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 volute 2. The third seal can fill and seal the gap between the bottom plate of the box body 1 and the fourth connecting portion 31, thereby improving the connection sealing effect between the bottom plate of the box body 1 and the air inlet joint 3.

[0037] For the power device of the present utility model, the volute 2 is an injection molded part, and the first connecting portion 211 at the upper edge of the surrounding plate 21 is also integrally injection molded with the volute 2, and the air outlet joint 23 is also at least partially integrally injection molded with the volute 2. Please refer to Figure 3 , the air outlet joint 23 includes a lower pipe body 231 and an upper pipe body 232. The lower pipe body 231 is integrally formed with the volute 2. The upper pipe body 232 and the lower pipe body 231 are hermetically connected to the top plate of the box body 1. An avoidance opening 116 for avoiding the upper pipe body 232 is provided on the top plate of the box body 1. When assembling the power device, the upper pipe body 232 and the lower pipe body 231 are hermetically spliced. Both the upper pipe body 232 and the lower pipe body 231 are made of plastic. Among them, the lower pipe body 231 is integrally injection molded with the volute 2, so that the connection method between the lower pipe body 231 and the volute 2 can be simplified and the connection sealing performance can be improved. The upper pipe body 232 is separated from the lower pipe body 231 and the volute 2, which is convenient for demolding during injection molding. The avoidance opening 116 can prevent the top plate of the box body 1 from obstructing the upper pipe body 232, thereby simplifying the connection process between the upper pipe body 232, the lower pipe body 231 and the top plate of the box body 1.

[0038] For the power device of the present utility model, please refer to Figure 3, on both sides of the lower pipe body 231, the fifth connecting parts 2311 extend outwards. On both sides of the upper pipe body 232, the sixth connecting parts 2322 extend outwards. The fifth connecting parts 2311 and the sixth connecting parts 2322 are connected, and a fourth sealing member is provided therebetween. At the front edge of the upper pipe body 232, a third connecting part 2321 is provided. The third connecting part 2321 is hermetically connected to the top plate of the box body 1, and a fifth sealing member is provided therebetween. The fourth sealing member and the fifth sealing member can be sealing cotton or other sealing materials that can be deformed after being extruded. The connection between the lower pipe body 231 and the upper pipe body 232 is realized by the connection between the fifth connecting part 2311 and the sixth connecting part 2322, which can increase the connection area between the lower pipe body 231 and the upper pipe body 232, so that there is enough area between the lower pipe body 231 and the upper pipe body 232 to set the fourth sealing member, thereby improving the connection sealing performance between the lower pipe body 231 and the upper pipe body 232. The third connecting part 2321 can increase the connection area between the upper pipe body 232 and the top plate of the box body 1, so that there is enough area between the upper pipe body 232 and the top plate of the box body 1 to set the fifth sealing member, thereby improving the connection sealing performance between the upper pipe body 232 and the top plate of the box body 1.

[0039] For the power device of the present utility model, please refer to Figure 4 , on the fifth connecting part 2311, a fourth blind hole 23111 is provided. On the sixth connecting part 2322, a fifth connecting hole 23221 is provided. A screw passes through the fifth connecting hole 23221 and the fourth blind hole 23111 to hermetically connect the fifth connecting part 2311 and the sixth connecting part 2322. The inner wall of the fourth blind hole 23111 is provided with internal threads. After the screw passes through the fifth connecting hole 23221, it is threadedly engaged with the fourth blind hole 23111, which can simplify the fixing method of the screw and the fourth blind hole 23111. The fourth blind hole 23111 is not communicated with the outside world. Therefore, the turbine chamber and the outside world will not have air flow communication through the fourth blind hole 23111. The head of the screw can close the fifth connecting hole 23221. Therefore, the turbine chamber will not have air flow communication with the outside through the fifth connecting hole 23221. In this way, the sealing effect after the connection between the fifth connecting part 2311 and the sixth connecting part 2322 can be ensured.

[0040] For the power device of the present utility model, please refer to Figure 7 , the fourth connecting part 31 is wound around the air outlet end of the air inlet joint 3. A ring groove 312 is provided thereon which is wound around the air inlet joint 3. The edge of the second through hole 222 of the lower cover plate 22 extends downwards to form a ring wall 223. After the air inlet joint 3 is connected to the box body 1, the ring wall 223 extends into the ring groove 312, and the air outlet end of the air inlet joint 3 extends into the turbine chamber through the second through hole 222. The ring wall 223 extending into the ring groove 312 can play a positioning role for the fourth connecting part 31, preventing the air inlet joint 3 from shifting, so as to ensure that the axes of the air inlet joint 3, the first through hole 111 and the second through hole 222 coincide.

[0041] Please refer to Figure 8 , the present utility model also provides a range hood, which adopts the above-mentioned power device and includes an air collecting assembly 5. The air collecting assembly 5 has an air collecting cavity, an air suction port and an air outlet communicated with the air collecting cavity. The air outlet is connected to the air inlet joint 3 through a connecting pipe 6.

[0042] 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 within the protection scope of the present utility model.

Claims

1. A power device for a range hood, characterized in that, Comprising: A box body (1) having a receiving cavity (11), a first through hole (111) provided on the bottom plate of the receiving cavity (11), and an outlet (112) provided on one side side plate of the receiving cavity (11); A volute (2) provided in the receiving cavity (11), including a surrounding plate (21), a lower cover plate (22) and an air outlet joint (23). The lower cover plate (22) and the air outlet joint (23) are integrally formed with the surrounding plate (21). A first connecting portion (211) is provided on the upper edge of the surrounding plate (21). A second connecting portion (221) and a second through hole (222) are provided on the lower cover plate (22). The size of the second through hole (222) is smaller than the size of the first through hole (111). The air outlet joint (23) extends out of the box body (1) through the outlet (112). A third connecting portion (2321) is provided on the front edge of the air outlet joint (23). The first connecting portion (211) and the third connecting portion (2321) are hermetically connected to the top plate of the box body (1). The top plate of the box body (1) and the volute (2) enclose a turbine cavity. The turbine cavity is not in fluid communication with the receiving cavity (11). The turbine cavity is in communication with the outside through the air outlet joint (23); An air inlet joint (3) provided on the lower surface of the box body (1). A fourth connecting portion (31) is provided on the air inlet joint (3). A connecting member sequentially passes through the fourth connecting portion (31), the bottom plate of the box body (1) and the second connecting portion (221) to connect the air inlet joint (3) and the lower cover plate (22) to the bottom plate of the box body (1), and to align the axes of the first through hole (111), the second through hole (222) and the air inlet joint (3); A turbine assembly (4) provided in the volute (2) and connected to the top plate of the box body (1).

2. The power device according to claim 1, wherein A first blind hole (2111) is provided on the first connecting portion (211). A second blind hole (23211) is provided on the third connecting portion (2321). A first connecting hole (113) corresponding to the first blind hole (2111) and a second connecting hole (114) corresponding to the second blind hole (23211) are provided on the top plate of the box body (1). Screws sequentially pass through the first connecting hole (113) and the first blind hole (2111) to hermetically connect the top plate of the box body (1) to the surrounding plate (21). Screws sequentially pass through the second connecting hole (114) and the second blind hole (23211) to hermetically connect the top plate of the box body (1) to the air outlet joint (23).

3. The power device according to claim 1, characterized in that, A third blind hole (2211) is provided on the second connecting portion (221), a third connecting hole (115) is provided on the bottom plate of the box body (1), and a fourth connecting hole (311) is provided on the fourth connecting portion (31). A connecting member sequentially passes through the fourth connecting hole (311), the third connecting hole (115), and the third blind hole (2211) to sealingly connect the air inlet joint (3) and the lower cover plate (22) to the bottom plate of the box body (1).

4. The power device according to claim 1, characterized in that, A first sealing member is provided between the top plate of the box body (1) and the first connecting portion (211) and the third connecting portion (2321). After the top plate of the box body (1) is connected to the first connecting portion (211) and the third connecting portion (2321), the first sealing member is squeezed between the top plate of the box body (1) and the first connecting portion (211) and the third connecting portion (2321), and seals the gap between the top plate of the box body (1) and the first connecting portion (211) and the third connecting portion (2321).

5. The power device according to claim 1, characterized in that, A second sealing member is provided between the lower cover plate (22) and the bottom plate of the box body (1), and a third sealing member is provided between the fourth connecting portion (31) and the bottom plate of the box body (1). The connecting member sequentially passes through the fourth connecting portion (31), the bottom plate of the box body (1), and the second connecting portion (221) to connect the air inlet joint (3) and the lower cover plate (22) to the bottom plate of the box body (1), and squeezes the second sealing member between the lower cover plate (22) and the bottom plate of the box body (1), and squeezes the third sealing member between the bottom plate of the box body (1) and the fourth connecting portion (31).

6. The power device according to claim 1, characterized in that, The air outlet joint (23) includes a lower pipe body (231) and an upper pipe body (232). The lower pipe body (231) is integrally formed with the volute (2), and the upper pipe body (232) and the lower pipe body (231) are sealingly connected to the top plate of the box body (1). An avoidance opening (116) for avoiding the upper pipe body (232) is provided on the top plate of the box body (1).

7. The power device according to claim 6, characterized in that, The two side edges of the lower pipe body (231) extend outward to form a fifth connecting portion (2311), and the two side edges of the upper pipe body (232) extend outward to form a sixth connecting portion (2322). The fifth connecting portion (2311) and the sixth connecting portion (2322) are connected, and a fourth sealing member is provided therebetween. The front edge of the upper pipe body (232) is provided with the third connecting portion (2321), and the third connecting portion is sealingly connected to the top plate of the box body (1), and a fifth sealing member is provided therebetween.

8. The power device according to claim 7, characterized in that, A fourth blind hole (23111) is provided on the fifth connecting portion (2311), and a fifth connecting hole (23221) is provided on the sixth connecting portion (2322). Screws pass through the fifth connecting hole (23221) and the fourth blind hole (23111) to sealingly connect the fifth connecting portion (2311) and the sixth connecting portion (2322).

9. The power device according to claim 1, characterized in that, The fourth connecting portion (31) is disposed around the air outlet end of the air inlet joint (3), and is provided with an annular groove (312) disposed around the air inlet joint (3). An annular wall (223) extends downward from the edge of the second through hole (222) of the lower cover plate (22). After the air inlet joint (3) is connected to the box body (1), the annular wall (223) extends into the annular groove (312), and the air outlet end of the air inlet joint (3) extends into the turbine chamber through the second through hole (222).

10. A smoke machine, which uses the power device described in any one of claims 1 to 9, is characterized in that, It includes a wind collecting assembly (5). The wind collecting assembly (5) has a wind collecting chamber, an air suction port and an air outlet communicated with the wind collecting chamber. The air outlet is connected to the air inlet joint (3) through a connecting pipe (6).

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