Gas driving device and cleaning equipment

Abstract

The utility model provides a gas driving device and cleaning equipment, and relates to the technical field of electrical equipment, and the gas driving device comprises a volute which comprises a bottom wall; the impeller is arranged in the volute, and the impeller is provided with a rotating axis and a first surface facing the bottom wall; in the direction from the rotating axis to the edge, away from the rotating axis, of the hub, the bottom wall inclines in the direction away from the first face.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a gas driving device and a cleaning device. Background Art

[0002] In the related art, the sweeping robot uses a volute-type centrifugal fan to drive the gas, so as to clean the dust and impurities. However, during the operation of the existing volute-type centrifugal fan, the sealing between the volute and the impeller is poor, and sewage can easily enter through the gap between the volute and the impeller, causing corrosion to the fan's bearings or other metal parts, thus affecting the service life of the volute-type centrifugal fan. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of the utility model provides a gas drive device.

[0005] A second aspect of the utility model provides a cleaning device.

[0006] The first aspect of the utility model provides a gas drive device, comprising: a volute, including a bottom wall; an impeller, arranged in the volute, the impeller having a rotation axis and a first surface facing the bottom wall; wherein, in the direction from the rotation axis to the edge of the hub away from the rotation axis, the bottom wall is inclined in a direction away from the first surface.

[0007] The gas driving device provided by the utility model can be used for cleaning equipment, such as a sweeping robot. During the operation of the sweeping robot, the gas driving device drives the gas, so that the dust or impurities on the ground are cleaned by the flowing gas.

[0008] The gas driving device may include a volute and an impeller, wherein the impeller is arranged in the volute, the impeller has a rotation axis and a first surface facing the bottom wall of the volute, and the impeller can rotate around the rotation axis as an axis, thereby driving the gas.

[0009] Furthermore, in the direction from the rotation axis of the impeller to the edge of the impeller away from the rotation axis, the bottom wall of the volute is inclined in the direction away from the first surface of the impeller. That is, when the gas drive device is installed on the cleaning device, the rotation plane of the impeller is parallel to the ground during the operation of the cleaning device. At this time, since the bottom wall of the volute is inclined in the direction away from the first surface, the volute can be inclined in the direction of the ground in the circumferential direction of the rotation axis of the impeller. In this way, during the operation of the cleaning device, if sewage adheres to the bottom wall of the volute, since the bottom wall of the volute is inclined toward the ground, the sewage can flow in the direction away from the rotation axis of the hub under the action of gravity, thereby avoiding the sewage from flowing from the gap between the bottom wall of the volute and the impeller to the rotation axis of the impeller when the cleaning device is running for a long time, that is, avoiding the sewage from corroding the rotating shaft, bearings and related metal parts of the gas drive device.

[0010] It is understandable that, since the impeller can rotate in the volute, there must be a certain gap between the first surface of the impeller and the bottom wall of the volute. During the operation of the cleaning equipment, sewage impurities on the ground will enter the gap between the first surface and the bottom wall of the volute under the drive of the gas, and adhere to the bottom wall of the volute. By tilting the bottom wall of the volute relative to the first surface of the impeller, that is, when the cleaning equipment is in operation, the bottom wall of the volute can be tilted toward the ground. Even if sewage is attached to the bottom wall of the volute, the sewage will flow in the direction away from the rotation axis of the first surface under the action of gravity, thereby preventing sewage from corroding the rotating shaft, bearings and related metal parts of the gas drive device.

[0011] The gas drive device provided by the utility model tilts the bottom wall of the volute, that is, tilts the volute in the direction from the rotation axis of the impeller to the edge of the impeller toward the first surface away from the impeller, thereby achieving that during the operation of the cleaning equipment installed with the gas drive device, the bottom wall of the volute can be tilted toward the ground, and then when sewage is attached to the bottom wall of the volute, the sewage can flow in the direction away from the rotation axis of the impeller under the action of gravity, thereby preventing the sewage from corroding the rotating shaft, bearings and related metal parts of the gas drive device.

[0012] In addition, the gas driving device in the above technical solution provided by the utility model may also have the following additional technical features:

[0013] In some technical solutions, optionally, a vertical distance between an edge of the impeller away from the rotation axis and a bottom wall of the volute is greater than 0 mm and less than 2 mm.

[0014] In this technical solution, the bottom wall of the volute is inclined in the direction away from the first surface from the rotation axis of the impeller to the edge of the impeller away from the rotation axis, that is, at the edge of the impeller away from the rotation axis, the vertical distance between the impeller and the bottom wall of the volute is the largest. Therefore, setting the vertical distance between the edge of the impeller away from the rotation axis and the bottom wall of the volute to less than 2 mm can effectively avoid the inclination angle of the bottom wall of the volute being too large, resulting in the volute being too large in size, thereby ensuring the overall size of the gas drive device.

[0015] In some technical solutions, optionally, the impeller also includes: at least one first annular protrusion, arranged on the first surface; and / or the volute also includes: at least one second annular protrusion, arranged on the bottom wall; wherein the first annular protrusion and the second annular protrusion are coaxially arranged with the rotation axis as the center.

[0016] In this technical solution, the impeller may further include at least one first annular protrusion, and the at least one first annular protrusion may be arranged on the first surface of the impeller. The at least one first annular protrusion extends from the bottom wall of the first surface facing the volute, that is, the at least one first annular protrusion is located between the hub and the bottom wall of the volute.

[0017] Furthermore, at least one first annular protrusion is arranged with the rotation axis as the center, so that during the rotation of the impeller, the at least one first annular protrusion can stably rotate with the impeller to avoid swinging of the at least one first annular protrusion, that is, to avoid unnecessary vibration or noise during the operation of the gas drive device.

[0018] Furthermore, the volute may further include at least one second annular protrusion. The at least one second annular protrusion is disposed on the bottom wall of the volute and extends from the bottom wall of the volute to the first surface of the impeller. Moreover, the at least one second annular protrusion is coaxially disposed with the at least one first annular protrusion with the rotation axis as the center, so that during the rotation of the impeller, the second annular protrusion can be prevented from interfering with the rotation of the impeller.

[0019] By providing at least one first annular protrusion and at least one second annular protrusion, the first annular protrusion and the second annular protrusion can be used to block the sewage and impurities entering between the first surface and the bottom wall of the volute, thereby further preventing sewage or impurities from entering the rotating axis of the impeller through the gap between the first surface and the bottom wall of the volute, and further improving the sealing effect of the bearings, rotating shaft and other metal parts of the gas drive device.

[0020] In some technical solutions, optionally, when the impeller is provided with a first annular protrusion and the volute is provided with a second annular protrusion, the first annular protrusion and the second annular protrusion are staggered.

[0021] In this technical solution, at least one first annular protrusion and at least one second annular protrusion can be arranged alternately, so that the moving distance of sewage or impurities from the edge of the impeller to the direction of the rotation axis of the impeller can be increased through the matching arrangement between at least one first annular protrusion and at least one second annular protrusion, thereby further improving the blocking effect of sewage or impurities entering between the first surface and the bottom wall of the volute.

[0022] In some technical solutions, optionally, the width of the second annular protrusion is smaller than the distance between two adjacent first annular protrusions, and the second annular protrusion extends into the gap between the two adjacent first annular protrusions.

[0023] In this technical solution, at least one second annular protrusion is alternately arranged with at least one first annular protrusion. At the same time, each second annular protrusion can be extended into the gap between two adjacent first annular protrusions, so that the moving distance of sewage or impurities from the edge of the impeller to the direction of the rotation axis of the impeller can be further increased through the coordinated arrangement between at least one first annular protrusion and at least one second annular protrusion, thereby further improving the blocking effect on sewage or impurities entering between the first surface and the bottom wall of the volute.

[0024] Specifically, the width of the second annular protrusion may be set so that the width of the second annular protrusion is smaller than the distance between two adjacent first annular protrusions, so as to ensure that the second annular protrusion can extend into the gap between two adjacent first annular protrusions.

[0025] In some technical solutions, optionally, the distance between the second annular protrusion and the adjacent first annular protrusion is greater than 0 and less than or equal to 0.2 mm.

[0026] In this technical solution, the distance between the second annular protrusion and the adjacent first annular protrusion can be set to be greater than 0 and less than or equal to 0.2 mm. In this way, it can be ensured that when the impeller rotates, there is no interference between the first annular protrusion and the second annular protrusion, ensuring the normal rotation of the impeller. At the same time, it can also be ensured that the gap between the first annular protrusion and the second annular protrusion is not too large, ensuring the blocking effect on sewage and impurities.

[0027] In some technical solutions, optionally, the vertical height of the first annular protrusion gradually increases in the direction from the rotation axis to the edge of the impeller away from the rotation axis; and / or the vertical height of the second annular protrusion gradually increases in the direction from the rotation axis to the edge of the impeller away from the rotation axis.

[0028] In this technical solution, the bottom wall of the volute is inclined relative to the first surface of the impeller, so when at least one first annular protrusion is set, the vertical height of at least one first annular protrusion is also different. Specifically, from the rotation axis of the impeller to the edge of the impeller, the distance between the bottom wall of the volute and the first surface gradually increases. Therefore, in this direction, the vertical height of at least one first annular protrusion is gradually increased to ensure that each first annular protrusion can play a role in reducing the distance between the bottom wall of the volute and the first surface, thereby ensuring the blocking effect of at least one first annular protrusion on sewage or impurities.

[0029] Furthermore, based on the fact that the bottom wall of the volute is inclined relative to the first surface of the impeller, when at least one second annular protrusion is provided, the vertical height of at least one second annular protrusion is also different. Specifically, the distance between the bottom wall of the volute and the first surface gradually increases from the rotation axis of the impeller to the edge of the impeller, and therefore, in this direction, the vertical height of at least one second annular protrusion is gradually increased to ensure that each second annular protrusion can play a role in reducing the distance between the bottom wall of the volute and the first surface, thereby ensuring the blocking effect of at least one second annular protrusion on sewage or impurities.

[0030] In some technical solutions, optionally, the minimum distance between the first annular protrusion and the bottom wall is greater than 0 and less than or equal to 0.2 mm; and / or the minimum distance between the second annular protrusion and the first surface is greater than 0 and less than or equal to 0.2 mm.

[0031] In this embodiment, the distance between the first annular protrusion and the bottom wall of the volute can be set. On the basis of ensuring that the impeller can rotate normally relative to the volute, the distance between the first annular protrusion and the bottom wall of the volute can be reduced as much as possible to further enhance the blocking effect of the first annular protrusion on sewage or impurities.

[0032] Specifically, the vertical distance between each first annular protrusion and the bottom wall of the volute is greater than 0 and less than or 0.2 mm. In practical applications, the distance between each first annular protrusion and the bottom wall of the volute can be set to 0.1 mm.

[0033] Furthermore, the distance between the second annular protrusion and the first surface can be set to minimize the distance between the second annular protrusion and the first surface while ensuring that the impeller can rotate normally relative to the volute, so as to further enhance the blocking effect of the second annular protrusion on sewage or impurities.

[0034] Specifically, the distance between each second annular protrusion and the first surface is greater than 0 and less than or equal to 0.2 mm. In practical applications, the distance between each second annular protrusion and the first surface can be set to 0.1 mm.

[0035] In some technical schemes, optionally, a first axial hole is opened on the impeller, and a second axial hole is opened on the bottom wall, and the first axial hole and the second axial hole are coaxially arranged; the gas drive device also includes a driving member, which is arranged on the side of the bottom wall of the volute away from the impeller, and the rotating shaft of the driving member passes through the second axial hole and extends into the first axial hole to be connected with the impeller.

[0036] In this technical solution, the gas drive device may further include a driving member, which may be used to drive the impeller to rotate, so as to realize the gas drive function of the gas drive device. Specifically, the driving member may include a rotating shaft, which is connected to the impeller, and during the operation of the driving member, the impeller is driven to rotate by the rotating shaft, so as to realize the gas drive function.

[0037] Further, the driving member is arranged outside the volute, specifically, on the side of the bottom wall of the volute away from the impeller, and accordingly, a second shaft hole is provided on the bottom wall of the volute, so that the rotating shaft of the driving member can pass through the second shaft hole and extend into the interior of the volute. Further, a first shaft hole is provided on the impeller, and after the rotating shaft of the driving member passes through the second shaft hole on the bottom wall of the volute and extends into the volute, it further extends into the first shaft hole and is connected to the impeller to drive the impeller to rotate.

[0038] A second aspect of the utility model provides a cleaning device, comprising: a gas driving device as in any one of the above technical solutions.

[0039] The cleaning device provided by the utility model comprises the gas driving device of any one of the above technical solutions, so the cleaning device has all the beneficial effects of the gas driving device of any one of the above technical solutions, which will not be described one by one here.

[0040] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0042] Figure 1 A schematic diagram of the structure of a gas drive device according to an embodiment of the utility model is shown;

[0043] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0044] Figure 3 Shows Figure 1 Schematic diagram of the structure of the volute in the gas drive device;

[0045] Figure 4 Shows Figure 1 Schematic diagram of the structure of the impeller in a gas drive device.

[0046] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0047] 100 gas driving device, 102 volute, 104 impeller, 110 first annular protrusion, 112 second annular protrusion, 114 first axial hole, 116 second axial hole, 118 driving member, 120 bottom wall, 122 rotation axis, 124 first surface. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0050] Refer to the following Figures 1 to 4 To describe the gas drive device and cleaning equipment provided according to some embodiments of the present invention.

[0051] The utility model provides a gas driving device 100, such as Figure 1 and Figure 2 As shown, it includes: a volute 102, including a bottom wall 120; an impeller 104, which is arranged in the volute 102, and the impeller 104 has a rotation axis 122 and a first surface 124 facing the bottom wall 120; wherein, in the direction from the rotation axis 122 to the edge of the hub away from the rotation axis 122, the bottom wall 120 is inclined in the direction away from the first surface 124.

[0052] The gas driving device 100 provided by the utility model can be used for cleaning equipment, such as a sweeping robot. During the operation of the sweeping robot, the gas driving device 100 drives the gas, so that the dust or impurities on the ground are cleaned by the flowing gas.

[0053] The gas driving device 100 may include a volute 102 and an impeller 104, wherein the impeller 104 is disposed in the volute 102, the impeller 104 has a rotation axis 122 and a first surface 124 facing the bottom wall 120 of the volute 102, and the impeller 104 can rotate around the rotation axis 122 as an axis, thereby driving the gas.

[0054] Furthermore, from the rotation axis 122 of the impeller 104 to the edge of the impeller 104 away from the rotation axis 122, the bottom wall 120 of the volute 102 is tilted in a direction away from the first surface 124 of the impeller 104. That is, when the gas drive device 100 is installed on the cleaning equipment, the rotation plane of the impeller 104 is parallel to the ground during the operation of the cleaning equipment. At this time, since the bottom wall 120 of the volute 102 is tilted in a direction away from the first surface 124, the volute 102 can be tilted toward the ground in the circumferential direction of the rotation axis 122 of the impeller 104. In this way, during the operation of the cleaning device, if sewage adheres to the bottom wall 120 of the volute 102, since the bottom wall 120 of the volute 102 is inclined toward the ground, the sewage can flow toward the direction of the rotation axis 122 away from the hub under the action of gravity, thereby preventing the sewage from flowing from the gap between the bottom wall 120 of the volute 102 and the impeller 104 to the rotation axis 122 of the impeller 104 when the cleaning device is running for a long time, that is, preventing the sewage from corroding the rotating shaft, bearings and related metal parts of the gas drive device 100.

[0055] It is understandable that, since the impeller 104 can rotate in the volute 102, there will inevitably be a certain gap between the first surface 124 of the impeller 104 and the bottom wall 120 of the volute 102. During the operation of the cleaning equipment, sewage impurities on the ground will enter the gap between the first surface 124 and the bottom wall 120 of the volute 102 under the drive of the gas, and adhere to the bottom wall 120 of the volute 102. By tilting the bottom wall 120 of the volute 102 relative to the first surface 124 of the impeller 104, that is, when the cleaning equipment is in operation, the bottom wall 120 of the volute 102 can be tilted toward the ground. Even if sewage is attached to the bottom wall 120 of the volute 102, the sewage will flow toward the direction of the rotation axis 122 away from the first surface 124 under the action of gravity, thereby preventing the sewage from corroding the rotating shaft, bearings and related metal parts of the gas drive device 100.

[0056] The gas drive device 100 provided by the utility model is configured such that the bottom wall 120 of the volute 102 is tilted, that is, the volute 102 is tilted in the direction from the rotation axis 122 of the impeller 104 to the edge of the impeller 104 toward the first surface 124 away from the impeller 104, thereby achieving that during the operation of the cleaning equipment installed with the gas drive device 100, the bottom wall 120 of the volute 102 can be tilted toward the ground, and then when sewage is attached to the bottom wall 120 of the volute 102, the sewage can flow in the direction away from the rotation axis 122 of the impeller 104 under the action of gravity, thereby preventing the sewage from corroding the rotating shaft, bearings and related metal parts of the gas drive device 100.

[0057] In some embodiments, optionally, Figure 2 As shown, the vertical distance between the edge of the impeller 104 away from the rotation axis 122 and the bottom wall 120 of the volute 102 is greater than 0 mm and less than 2 mm.

[0058] In this embodiment, the bottom wall 120 of the volute 102 is tilted away from the first surface 124 in the direction from the rotation axis 122 of the impeller 104 to the edge of the impeller 104 away from the rotation axis 122, that is, at the edge of the impeller 104 away from the rotation axis 122, the vertical distance between the impeller 104 and the bottom wall 120 of the volute 102 is the largest, therefore, the vertical distance between the edge of the impeller 104 away from the rotation axis 122 and the bottom wall 120 of the volute 102 is set to be less than 2 mm, specifically, it can be set to 1 mm. This can effectively prevent the inclination angle of the bottom wall 120 of the volute 102 from being too large, resulting in the size of the volute 102 being too large, thereby ensuring the overall size of the gas drive device 100.

[0059] In some embodiments, optionally, Figure 2 , Figure 3 and Figure 4 As shown, the impeller 104 also includes: at least one first annular protrusion 110, arranged on the first surface 124; and / or the volute 102 also includes: at least one second annular protrusion 112, arranged on the bottom wall 120; wherein the first annular protrusion 110 and the second annular protrusion 112 are both coaxially arranged with the rotation axis 122 as the center.

[0060] In this embodiment, the impeller 104 may further include at least one first annular protrusion 110, and the at least one first annular protrusion 110 may be disposed on the first surface 124 of the impeller 104. The at least one first annular protrusion 110 extends from the first surface 124 toward the bottom wall 120 of the volute 102, that is, the at least one first annular protrusion 110 is located between the hub and the bottom wall 120 of the volute 102.

[0061] Furthermore, at least one first annular protrusion 110 is arranged with the rotation axis 122 as the center, so that during the rotation of the impeller 104, the at least one first annular protrusion 110 can stably rotate with the impeller 104, avoiding the swing of the at least one first annular protrusion 110, that is, avoiding unnecessary vibration or noise during the operation of the gas drive device 100.

[0062] Further, the volute 102 may also include at least one second annular protrusion 112. The at least one second annular protrusion 112 is disposed on the bottom wall 120 of the volute 102 and extends from the bottom wall 120 of the volute 102 to the first surface 124 of the impeller 104. Moreover, the at least one second annular protrusion 112 is coaxially disposed with the at least one first annular protrusion 110 with the rotation axis 122 as the center, so that during the rotation of the impeller 104, the second annular protrusion 112 can be prevented from interfering with the rotation of the impeller 104.

[0063] By providing at least one first annular protrusion 110 and at least one second annular protrusion 112, the first annular protrusion 110 and the second annular protrusion 112 can be used to block the sewage and impurities entering between the first surface 124 and the bottom wall 120 of the volute 102, thereby further preventing the sewage or impurities from entering the rotation axis of the impeller 104 through the gap between the first surface 124 and the bottom wall 120 of the volute 102, and further improving the sealing effect of the bearings, rotating shaft and other metal parts of the gas drive device 100.

[0064] In a specific application, the number of the first annular protrusions 110 can be set according to the diameter of the impeller 104 , for example, can be set to 5, 6 or more, and accordingly, the number of the second annular protrusions 112 is the same as the number of the first annular protrusions 110 .

[0065] Further, when the impeller 104 is provided with a first annular protrusion 110 and the volute 102 is provided with a second annular protrusion 112 , the first annular protrusion 110 and the second annular protrusion 112 are staggered.

[0066] Specifically, at least one first annular protrusion 110 and at least one second annular protrusion 112 may be alternately arranged, so that the moving distance of sewage or impurities from the edge of the impeller 104 to the direction of the rotation axis 122 of the impeller 104 can be increased through the matching arrangement between at least one first annular protrusion 110 and at least one second annular protrusion 112, thereby further improving the blocking effect of sewage or impurities entering between the first surface 124 and the bottom wall 120 of the volute 102.

[0067] Furthermore, the width of the second annular protrusion 112 is smaller than the distance between two adjacent first annular protrusions 110 , and the second annular protrusion 112 extends into the gap between the two adjacent first annular protrusions 110 .

[0068] Specifically, at least one second annular protrusion 112 is alternately arranged with at least one first annular protrusion 110. At the same time, each second annular protrusion 112 can be extended into the gap between two adjacent first annular protrusions 110, so that the moving distance of sewage or impurities from the edge of the impeller 104 to the direction of the rotation axis 122 of the impeller 104 can be further increased through the coordinated arrangement between at least one first annular protrusion 110 and at least one second annular protrusion 112, thereby further improving the blocking effect of sewage or impurities entering between the first surface 124 and the bottom wall 120 of the volute 102.

[0069] Specifically, the width of the second annular protrusion 112 may be set so that the width of the second annular protrusion 112 is smaller than the distance between two adjacent first annular protrusions 110 , so as to ensure that the second annular protrusion 112 can extend into the gap between two adjacent first annular protrusions 110 .

[0070] Furthermore, the distance between the second annular protrusion 112 and the adjacent first annular protrusion 110 is greater than 0 and less than or equal to 0.2 mm.

[0071] Specifically, the distance between the second annular protrusion 112 and the adjacent first annular protrusion 110 can be set to be greater than 0 and less than or equal to 0.2 mm. In this way, it can be ensured that when the impeller 104 rotates, there is no interference between the first annular protrusion 110 and the second annular protrusion 112, thereby ensuring the normal rotation of the impeller 104. At the same time, it can also be ensured that the gap between the first annular protrusion 110 and the second annular protrusion 112 is not too large, thereby ensuring the blocking effect on sewage and impurities.

[0072] In a specific application, the width of at least one first annular protrusion 110 and at least one second annular protrusion 112 can be set to 1.5 mm. Accordingly, the distance between two adjacent first annular protrusions 110 and the distance between two adjacent second annular protrusions 112 can be set to 2 mm, so as to ensure that the second annular protrusion 112 can extend into the gap between two adjacent first annular protrusions 110, and the first annular protrusion 110 can also extend into the gap between two adjacent second annular protrusions 112.

[0073] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the vertical height of the first annular protrusion 110 gradually increases from the rotation axis 122 to the edge of the impeller 104 away from the rotation axis 122; and / or the vertical height of the second annular protrusion 112 gradually increases from the rotation axis 122 to the edge of the impeller 104 away from the rotation axis 122.

[0074] In this embodiment, the bottom wall 120 of the volute 102 is inclined relative to the first surface 124 of the impeller 104, so when the at least one first annular protrusion 110 is set, the vertical height of the at least one first annular protrusion 110 is also different. Specifically, from the rotation axis 122 of the impeller 104 to the edge direction of the impeller 104, the distance between the bottom wall 120 of the volute 102 and the first surface 124 gradually increases, so in this direction, the vertical height of the at least one first annular protrusion 110 is gradually increased to ensure that each first annular protrusion 110 can play a role in reducing the distance between the bottom wall 120 of the volute 102 and the first surface 124, thereby ensuring the at least one first annular protrusion 110 to block sewage or impurities.

[0075] Furthermore, based on the fact that the bottom wall 120 of the volute 102 is tilted relative to the first surface 124 of the impeller 104, when the at least one second annular protrusion 112 is provided, the vertical height of the at least one second annular protrusion 112 is also different. Specifically, from the rotation axis 122 of the impeller 104 to the edge direction of the impeller 104, the distance between the bottom wall 120 of the volute 102 and the first surface 124 gradually increases, and therefore, in this direction, the vertical height of the at least one second annular protrusion 112 is gradually increased to ensure that each second annular protrusion 112 can play a role in reducing the distance between the bottom wall 120 of the volute 102 and the first surface 124, thereby ensuring the at least one second annular protrusion 112 has a blocking effect on sewage or impurities.

[0076] Furthermore, the minimum distance between the first annular protrusion 110 and the bottom wall 120 is greater than 0 and less than or equal to 0.2 mm; and / or the minimum distance between the second annular protrusion 112 and the first surface 124 is greater than 0 and less than or equal to 0.2 mm.

[0077] Specifically, the distance between the first annular protrusion 110 and the bottom wall 120 of the volute 102 can be set. On the basis of ensuring that the impeller 104 can rotate normally relative to the volute 102, the distance between the first annular protrusion 110 and the bottom wall 120 of the volute 102 can be reduced as much as possible to further enhance the blocking effect of the first annular protrusion 110 on sewage or impurities.

[0078] Specifically, the vertical distance between each first annular protrusion 110 and the bottom wall 120 of the volute 102 is greater than 0 and less than or 0.2 mm. In practical applications, the distance between each first annular protrusion 110 and the bottom wall 120 of the volute 102 can be set to 0.1 mm.

[0079] Furthermore, the distance between the second annular protrusion 112 and the first surface 124 can be set. On the basis of ensuring that the impeller 104 can rotate normally relative to the volute 102, the distance between the second annular protrusion 112 and the first surface 124 can be reduced as much as possible to further enhance the blocking effect of the second annular protrusion 112 on sewage or impurities.

[0080] Specifically, the distance between each second annular protrusion 112 and the first surface 124 is greater than 0 and less than or equal to 0.2 mm. In practical applications, the distance between each second annular protrusion 112 and the first surface 124 can be set to 0.1 mm.

[0081] In some embodiments, optionally, Figure 3 and Figure 4 As shown, a first axial hole 114 is formed on the impeller 104, and a second axial hole 116 is formed on the bottom wall 120, and the first axial hole 114 and the second axial hole 116 are coaxially arranged; the gas drive device 100 also includes a driving member 118, which is arranged on the side of the bottom wall 120 of the volute 102 away from the impeller 104, and the rotating shaft of the driving member 118 passes through the second axial hole 116 and extends into the first axial hole 114 to be connected with the hub.

[0082] In this embodiment, the gas drive device 100 may further include a driving member 118, and the driving member 118 may be used to drive the impeller 104 to rotate, so as to realize the gas drive function of the gas drive device 100. Specifically, the driving member 118 may include a rotating shaft, and the rotating shaft is connected to the impeller 104. During the operation of the driving member 118, the impeller 104 is driven to rotate by the rotating shaft, so as to realize the gas drive function.

[0083] Further, the driving member 118 is arranged outside the volute 102, specifically, on the side of the bottom wall 120 of the volute 102 away from the impeller 104. Accordingly, a second shaft hole 116 is provided on the bottom wall 120 of the volute 102, so that the rotating shaft of the driving member 118 can pass through the second shaft hole 116 and extend into the interior of the volute 102. Further, a first shaft hole 114 is provided on the impeller 104. After the rotating shaft of the driving member 118 passes through the second shaft hole 116 on the bottom wall 120 of the volute 102 and extends into the volute 102, it further extends into the first shaft hole 114 and is connected to the impeller 104 to drive the impeller 104 to rotate.

[0084] The utility model provides a cleaning device, comprising: a gas driving device 100 as in any one of the above technical solutions.

[0085] The cleaning device provided by the utility model includes the gas driving device 100 of any one of the above technical solutions, so the cleaning device has all the beneficial effects of the gas driving device 100 of any one of the above technical solutions, which will not be described one by one here.

[0086] Specifically, the cleaning device includes a sweeping robot.

[0087] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas driven device, characterized in that: include: the volute, including the bottom wall; An impeller is disposed in the volute, the impeller having a rotation axis and a first surface facing the bottom wall; Wherein, in a direction from the rotation axis to an edge of the impeller away from the rotation axis, the bottom wall is inclined in a direction away from the first surface.

2. The gas drive device according to claim 1, characterized in that: A vertical distance between an edge of the impeller away from the rotation axis and a bottom wall of the volute is greater than 0 mm and less than 2 mm.

3. The gas driven device according to claim 1 or 2, characterized in that: The impeller further comprises: at least one first annular protrusion, disposed on the first surface; and / or The volute also includes: at least one second annular protrusion, disposed on the bottom wall; Wherein, the first annular protrusion and the second annular protrusion are both coaxially arranged with the rotation axis as the center.

4. The gas drive device according to claim 3, characterized in that: When the impeller is provided with the first annular protrusion and the volute is provided with the second annular protrusion, the first annular protrusion and the second annular protrusion are staggered.

5. The gas driving device according to claim 4, characterized in that: The width of the second annular protrusion is smaller than the distance between two adjacent first annular protrusions, and the second annular protrusion extends into the gap between two adjacent first annular protrusions.

6. The gas driven device according to claim 5, characterized in that: The distance between the second annular protrusion and the adjacent first annular protrusion is greater than 0 and less than or equal to 0.2 mm.

7. The gas driving device according to claim 3, characterized in that: The vertical height of the first annular protrusion gradually increases in a direction from the rotation axis to the edge of the impeller away from the rotation axis; and / or In a direction from the rotation axis to an edge of the impeller away from the rotation axis, a vertical height of the second annular protrusion gradually increases.

8. The gas driving device according to claim 3, characterized in that: The minimum distance between the first annular protrusion and the bottom wall is greater than 0 and less than or equal to 0.2 mm; and / or A minimum distance between the second annular protrusion and the first surface is greater than 0 and less than or equal to 0.2 mm.

9. The gas driven device according to claim 1 or 2, characterized in that: The impeller is provided with a first axial hole, the bottom wall is provided with a second axial hole, and the first axial hole and the second axial hole are coaxially arranged; The gas driving device further comprises a driving member, which is arranged on a side of the bottom wall of the volute away from the impeller, and a rotating shaft of the driving member passes through the second shaft hole, extends into the first shaft hole and is connected to the impeller.

10. A cleaning device, characterized in that: include: A gas driven device as claimed in any one of claims 1 to 9.

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