CN222296564U - Gas driving device and cleaning equipment - Google Patents

Abstract

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

Description

Gas driving device and cleaning equipment

Technical Field

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

Background

In the related art, the sweeping robot drives gas through the volute type centrifugal fan, so that dust and impurities are cleaned by the sweeping robot. However, in the running process of the conventional volute type centrifugal fan, the tightness between the volute and the impeller is poor, sewage is easy to enter from a gap between the volute and the impeller, and corrosion is caused to bearings or other metal components of the fan, so that the service life of the volute type centrifugal fan is influenced.

Disclosure of utility model

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

To this end, a first aspect of the utility model provides a gas driven apparatus.

A second aspect of the utility model provides a cleaning apparatus.

The first aspect of the utility model provides a gas driving device, which comprises a volute, an impeller and a gas pump, wherein the volute comprises a bottom wall, the impeller is arranged in the volute, the impeller is provided with a rotation axis and a first surface facing the bottom wall, the bottom wall is inclined in a direction away from the first surface from the rotation axis to the edge of a hub away from the rotation axis.

The gas driving device provided by the utility model can be used for cleaning equipment, such as a sweeping robot. In the running process of the sweeping robot, the gas is driven by the gas driving device, so that dust or impurities on the ground are cleaned by the flowing gas.

The gas driving device can comprise a volute and an impeller, wherein the impeller is arranged in the volute, the impeller is provided with a rotation axis and a first surface facing the bottom wall of the volute, and the impeller can rotate by taking the rotation axis as a shaft, so that the gas is driven.

Further, the bottom wall of the volute is inclined in a direction away from the first surface of the impeller from the rotation axis of the impeller to an edge of the impeller away from the rotation axis. That is, when the gas driving device is mounted on the cleaning apparatus, the rotation plane of the impeller is parallel to the ground during operation of the cleaning apparatus, and at this time, since the bottom wall of the scroll case is inclined in a direction away from the first surface, the scroll case can be inclined toward the ground in the circumferential direction of the rotation axis of the impeller. Like this, in the in-process of cleaning equipment operation, if there is sewage to adhere to on the diapire of spiral case, because the diapire of spiral case sets up towards the ground slope to make sewage can flow towards the direction of keeping away from wheel hub's axis of rotation under the effect of gravity, and then avoided cleaning equipment under the long-time circumstances of operation, sewage flow to impeller's axis of rotation department from the gap between spiral case's diapire and the impeller, also avoided sewage to cause the corruption to gas drive's pivot, bearing and relevant metal part promptly.

It can be understood that, because the impeller can rotate in the spiral case, therefore, certain gap can necessarily exist between the first face of impeller and the diapire of spiral case, at cleaning equipment operation's in-process, subaerial sewage impurity can get into the gap between the diapire of first face and spiral case under the drive of gas, and adhere to on the diapire of spiral case, through the diapire slope setting for the first face of impeller with the spiral case, namely under cleaning equipment operation's state, the diapire of spiral case can be inclined towards ground, in time the diapire of spiral case has adhered to sewage, sewage also can flow towards the direction of the axis of rotation of keeping away from first face under the action of gravity, avoid sewage to cause the corruption to gas drive's pivot, bearing and relevant metal parts.

According to the gas driving device provided by the utility model, the bottom wall of the volute is obliquely arranged, namely, the volute is obliquely arranged in the direction from the rotation axis of the impeller to the edge of the impeller towards the direction away from the first surface of the impeller, so that the bottom wall of the volute can be inclined towards the ground in the running process of cleaning equipment installed by the gas driving device, 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, and the corrosion of the sewage to the rotating shaft, the bearing and related metal parts of the gas driving device is avoided.

In addition, the gas driving device in the technical scheme provided by the utility model can also have the following additional technical characteristics:

In some embodiments, optionally, the vertical distance between the edge of the impeller remote from the axis of rotation and the bottom wall of the volute is greater than 0 mm and less than 2mm.

In this technical scheme, from the direction of the axis of rotation of impeller to the edge that the axis of rotation was kept away from to the impeller, the diapire of spiral case is to the direction slope setting of keeping away from first face, that is, in the edge that the axis of rotation was kept away from to the impeller, perpendicular distance between impeller and the diapire of spiral case is biggest, consequently, set the perpendicular distance between the edge that the axis of rotation was kept away from to the impeller and the diapire of spiral case to be less than 2 millimeters, can avoid the inclination of the diapire of spiral case too big effectively, cause the size of spiral case too big, and then guarantee gas drive arrangement's overall dimension.

In some technical schemes, the impeller optionally further comprises at least one first annular protrusion arranged on the first face, and/or the volute further comprises 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.

In this solution, the impeller may further comprise at least one first annular protrusion, which may be provided on the first face of the impeller. At least one first annular projection extends from the first face toward the bottom wall of the volute, i.e., the at least one first annular projection is located between the hub and the bottom wall of the volute.

Further, the at least one first annular protrusion is arranged with the rotation axis as the center, so that in the process of rotation of the impeller, the at least one first annular protrusion can stably rotate along with the impeller, and the at least one first annular protrusion is prevented from swinging, namely, unnecessary vibration or noise of the gas driving device in the process of operation is avoided.

Further, the volute may also include at least one second annular protrusion. At least one second annular projection is disposed on the bottom wall of the volute and extends from the bottom wall of the volute toward the first face of the impeller. And at least one second annular bulge is coaxially arranged with at least one first annular bulge by taking the rotation axis as the center, so that the interference of the second annular bulge on the rotation of the impeller can be avoided in the rotation process of the impeller.

Through the bellied setting of at least one first annular arch and at least one second annular, can utilize first annular arch and second annular arch to block the sewage impurity that gets into between the diapire of first face and spiral case to further avoid sewage or impurity to enter into the rotation axle center department of impeller from the gap between the diapire of first face and spiral case, further improved the sealed effect to gas drive arrangement's bearing and pivot and other metal parts.

In some embodiments, optionally, when the impeller is provided with a first annular protrusion, the volute is provided with a second annular protrusion, and the first annular protrusion and the second annular protrusion are disposed in a staggered manner.

In this technical scheme, can set up at least one first annular protruding and at least one second annular protruding crisscross to can realize through the cooperation setting between at least one first annular protruding and the at least one second annular protruding, increase sewage or impurity from the edge of impeller to the ascending removal distance of axis of rotation direction of impeller, and then can further improve the effect of blockking up sewage or impurity that gets into between the diapire of first face and spiral case.

In some embodiments, optionally, the width of the second annular protrusion is smaller than the distance between two adjacent first annular protrusions, and the second annular protrusion protrudes into the gap between two adjacent first annular protrusions.

In this technical scheme, at least one second annular bulge and at least one first annular bulge are crisscross to be set up, simultaneously, can also stretch into every second annular bulge in the gap between two adjacent first annular bulges to can realize through the cooperation setting between at least one first annular bulge and the at least one second annular bulge, further increase the sewage or impurity from the edge of impeller to the epaxial removal distance of axis of rotation of impeller, and then can further improve the effect of blockking up sewage or impurity between the diapire to getting into first face and spiral case.

In particular, the width of the second annular protrusion may be set such that the width of the second annular protrusion is smaller than the distance between two adjacent first annular protrusions, to ensure that the second annular protrusion can extend into the gap between two adjacent first annular protrusions.

In some aspects, 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 millimeters.

In this technical solution, a distance between the second annular protrusion and the adjacent first annular protrusion may be set to be greater than 0 and less than or equal to 0.2 mm. Therefore, when the impeller rotates, interference between the first annular bulge and the second annular bulge can not occur, and normal rotation of the impeller is guaranteed. Simultaneously, can also guarantee that the gap between first annular protruding and the second annular protruding can not be too big, guarantee to block the effect to sewage and impurity.

In some embodiments, optionally, the vertical height of the first annular projection increases gradually from the axis of rotation to the edge of the impeller away from the axis of rotation, and/or the vertical height of the second annular projection increases gradually from the axis of rotation to the edge of the impeller away from the axis of rotation.

In this solution, the bottom wall of the volute is arranged inclined with respect to the first face of the impeller, so that the vertical height of the at least one first annular projection is also different when the at least one first annular projection is arranged. Specifically, the distance between the bottom wall of the volute and the first surface gradually increases in the direction from the rotation axis of the impeller to the edge of the impeller, and therefore, in this direction, the vertical height of the at least one first annular protrusion gradually increases 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, and further ensure the blocking effect of the at least one first annular protrusion on sewage or impurities.

Further, the vertical height of the at least one second annular projection is also different when the at least one second annular projection is provided, based on the bottom wall of the volute being arranged obliquely with respect to the first face of the impeller. Specifically, the distance between the bottom wall of the volute and the first surface gradually increases in the direction from the rotation axis of the impeller to the edge of the impeller, and therefore, in this direction, the vertical height of the at least one second annular protrusion gradually increases 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, and further ensure the blocking effect of the at least one second annular protrusion on sewage or impurities.

In some embodiments, optionally, the minimum distance between the first annular projection and the bottom wall is greater than 0 and less than or equal to 0.2 millimeters, and/or the minimum distance between the second annular projection and the first face is greater than 0 and less than or equal to 0.2 millimeters.

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

Specifically, each first annular projection is spaced from the bottom wall of the volute by a vertical distance greater than 0 and less than or equal to 0.2 millimeters. In practical application, the distance between each first annular projection and the bottom wall of the scroll case may be set to 0.1 mm.

Further, the distance between the second annular protrusion and the first surface can be set, so that the distance between the second annular protrusion and the first surface is reduced as much as possible on the basis that the impeller can normally rotate relative to the volute, and the blocking effect of the second annular protrusion on sewage or impurities is further improved.

Specifically, the distance between each second annular protrusion and the first face is greater than 0 and less than or equal to 0.2 millimeters. In practical applications, the distance between each second annular projection and the first face may be set to 0.1 mm.

In some technical schemes, optionally, the impeller is provided with a first shaft hole, the bottom wall is provided with a second shaft hole, the first shaft hole and the second shaft hole are coaxially arranged, the gas driving device further comprises a driving piece arranged on one side of the bottom wall of the volute, which is far away from the impeller, and a rotating shaft of the driving piece penetrates through the second shaft hole and stretches into the first shaft hole to be connected with the impeller.

In this technical solution, the gas driving device may further include a driving member, and the driving member may be used to drive the impeller to rotate, so as to implement a gas driving function of the gas driving device. Specifically, the driving piece can include the pivot, and the pivot is connected with the impeller, and the in-process of driving piece operation drives the impeller through the pivot and rotates to realize gas drive's function.

Further, the driving piece is arranged outside the volute, specifically arranged on one side of the bottom wall of the volute away from the impeller, and correspondingly, a second shaft hole is formed in the bottom wall of the volute, so that a rotating shaft of the driving piece can penetrate through the second shaft hole to extend into the volute. Further, a first shaft hole is formed in the impeller, and a rotating shaft of the driving piece penetrates through a second shaft hole in the bottom wall of the volute to extend into the volute, then further extends into the first shaft hole and is connected with the impeller to drive the impeller to rotate.

A second aspect of the utility model provides a cleaning apparatus comprising a gas driven device as claimed in any one of the preceding claims.

The cleaning device provided by the utility model comprises the gas driving device in any one of the above technical schemes, so that the cleaning device has all the beneficial effects of the gas driving device in any one of the above technical schemes, and the description is omitted herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 shows a schematic diagram of a gas driving apparatus provided according to an embodiment of the present utility model;

FIG. 2 shows a partial enlarged view at A in FIG. 1;

FIG. 3 shows a schematic view of the structure of the volute of the gas drive of FIG. 1;

fig. 4 shows a schematic view of the impeller of the gas drive apparatus of fig. 1.

The correspondence between the reference numerals and the component names in fig. 1 to 4 is:

100 gas drive, 102 volute, 104 impeller, 110 first annular projection, 112 second annular projection, 114 first axial bore, 116 second axial bore, 118 drive, 120 bottom wall, 122 axis of rotation, 124 first face.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

A gas driving apparatus and a cleaning device provided according to some embodiments of the present utility model are described below with reference to fig. 1 to 4.

The utility model provides a gas driving device 100, as shown in fig. 1 and 2, comprising a volute 102, an impeller 104, and an impeller, wherein the volute 102 comprises a bottom wall 120, the impeller 104 is arranged in the volute 102, the impeller 104 is provided with a rotation axis 122 and a first surface 124 facing the bottom wall 120, and the bottom wall 120 is inclined in a direction away from the first surface 124 from the rotation axis 122 to the direction of the rim of the hub away from the rotation axis 122.

The gas drive device 100 provided by the utility model can be used for cleaning equipment, such as a sweeping robot. During the operation of the robot for sweeping floor, the gas is driven by the gas driving device 100, so that dust or foreign materials on the floor are cleaned by the flowing gas.

The gas driving device 100 may include a volute 102 and an impeller 104, where the impeller 104 is disposed in the volute 102, the impeller 104 has a rotation axis 122 and a first surface 124 facing a bottom wall 120 of the volute 102, and the impeller 104 can rotate about the rotation axis 122, so as to drive gas.

Further, the bottom wall 120 of the volute 102 is disposed obliquely in a direction away from the first face 124 of the impeller 104 from the rotation axis 122 of the impeller 104 to an edge of the impeller 104 away from the rotation axis 122. That is, when the gas driving apparatus 100 is mounted on the cleaning device, the rotation plane of the impeller 104 is parallel to the ground during operation of the cleaning device, and at this time, since the bottom wall 120 of the scroll casing 102 is inclined in a direction away from the first surface 124, the scroll casing 102 can be inclined toward the ground in the circumferential direction of the rotation axis 122 of the impeller 104. Thus, if sewage is attached to the bottom wall 120 of the volute 102 during the operation of the cleaning device, the bottom wall 120 of the volute 102 is inclined towards the ground, so that the sewage can flow towards the direction away from the rotation axis 122 of the hub under the action of gravity, and further, the situation that the sewage flows to the rotation axis 122 of the impeller 104 from the gap between the bottom wall 120 of the volute 102 and the impeller 104 under the condition that the cleaning device operates for a long time is avoided, namely, the corrosion of the sewage to the rotating shaft, the bearing and related metal components of the gas driving device 100 is avoided.

It will be appreciated that, since the impeller 104 can rotate in the volute 102, a certain gap must exist between the first surface 124 of the impeller 104 and the bottom wall 120 of the volute 102, during the operation of the cleaning device, the 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 driving of the gas and adhere to the bottom wall 120 of the volute 102, and by obliquely setting the bottom wall 120 of the volute 102 relative to the first surface 124 of the impeller 104, that is, in the state of the operation of the cleaning device, the bottom wall 120 of the volute 102 can incline towards the ground, and in time the bottom wall 120 of the volute 102 adheres to the sewage, the sewage will flow in a direction away from the rotation axis 122 of the first surface 124 under the action of gravity, so as to avoid the corrosion of the sewage to the rotating shaft, the bearing and the related metal components of the gas driving device 100.

According to the gas driving device 100 provided by the utility model, the bottom wall 120 of the volute 102 is obliquely arranged, namely, the volute 102 is obliquely arranged towards the direction away from the first surface 124 of the impeller 104 in the direction from the rotation axis 122 of the impeller 104 to the edge of the impeller 104, so that the bottom wall 120 of the volute 102 can be inclined towards the ground in the running process of cleaning equipment installed on the gas driving device 100, and then when sewage is attached to the bottom wall 120 of the volute 102, the sewage can flow towards the direction away from the rotation axis 122 of the impeller 104 under the action of gravity, and the corrosion of the sewage on the rotating shaft, bearings and related metal components of the gas driving device 100 is avoided.

In some embodiments, optionally, as shown in fig. 2, the vertical distance between the edge of the impeller 104 remote from the axis of rotation 122 and the bottom wall 120 of the volute 102 is greater than 0 millimeters and less than 2 millimeters.

In this embodiment, the bottom wall 120 of the scroll casing 102 is disposed obliquely in a direction away from the first face 124 from the rotation axis 122 of the impeller 104 to an edge of the impeller 104 away from the rotation axis 122, that is, at an edge of the impeller 104 away from the rotation axis 122, a vertical distance between the impeller 104 and the bottom wall 120 of the scroll casing 102 is maximized, and thus, the vertical distance between the edge of the impeller 104 away from the rotation axis 122 and the bottom wall 120 of the scroll casing 102 is set to be less than 2 mm, and may be set to 1 mm in particular. The oversized volute 102 can be effectively avoided due to the oversized inclination angle of the bottom wall 120 of the volute 102, so as to ensure the overall size of the gas driving device 100.

In some embodiments, optionally, as shown in fig. 2, 3 and 4, the impeller 104 further comprises at least one first annular protrusion 110 disposed on the first face 124, and/or the volute 102 further comprises at least one second annular protrusion 112 disposed on the bottom wall 120, wherein the first annular protrusion 110 and the second annular protrusion 112 are each coaxially disposed about the rotational axis 122.

In this embodiment, the impeller 104 may further include at least one first annular protrusion 110 thereon, and the at least one first annular protrusion 110 may be disposed on the first face 124 of the impeller 104. At least one first annular projection 110 extends from the first face 124 toward the bottom wall 120 of the volute 102, i.e., the at least one first annular projection 110 is located between the hub and the bottom wall 120 of the volute 102.

Further, the at least one first annular protrusion 110 is disposed with the rotation axis 122 as a center, so that the at least one first annular protrusion 110 can stably rotate along with the impeller 104 during the rotation of the impeller 104, so as to avoid the at least one first annular protrusion 110 from swinging, i.e. avoid unnecessary vibration or noise of the gas driving device 100 during the operation.

Further, the volute 102 may also include at least one second annular protrusion 112. At least one second annular projection 112 is disposed on the bottom wall 120 of the volute 102 and extends from the bottom wall 120 of the volute 102 toward the first face 124 of the impeller 104. And, at least one second annular protrusion 112 is coaxially disposed with at least one first annular protrusion 110 about the rotation axis 122, so that interference of the second annular protrusion 112 to the rotation of the impeller 104 during the rotation of the impeller 104 can be avoided.

By the arrangement of the at least one first annular protrusion 110 and the at least one second annular protrusion 112, the first annular protrusion 110 and the second annular protrusion 112 can be utilized to block the entered sewage impurities between the first face 124 and the bottom wall 120 of the volute 102, thereby further avoiding that the sewage or impurities enter the rotation axis of the impeller 104 from the gap between the first face 124 and the bottom wall 120 of the volute 102, and further improving the sealing effect on the bearings, the rotation shaft and other metal components of the gas driving device 100.

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

Further, when the impeller 104 is provided with the first annular protrusion 110, the volute 102 is provided with the second annular protrusion 112, and the first annular protrusion 110 and the second annular protrusion 112 are disposed in a staggered manner.

Specifically, the at least one first annular protrusion 110 and the at least one second annular protrusion 112 may be staggered, so that a movement distance of the sewage or the impurity from the edge of the impeller 104 to the rotation axis 122 of the impeller 104 may be increased by the cooperation between the at least one first annular protrusion 110 and the at least one second annular protrusion 112, and thus a blocking effect of the sewage or the impurity entering between the first face 124 and the bottom wall 120 of the volute 102 may be further improved.

Further, the width of the second annular protrusion 112 is smaller than the distance between the adjacent two first annular protrusions 110, and the second annular protrusion 112 protrudes into the gap between the adjacent two first annular protrusions 110.

Specifically, the at least one second annular protrusion 112 and the at least one first annular protrusion 110 are staggered, and at the same time, each second annular protrusion 112 may also extend into a gap between two adjacent first annular protrusions 110, so that by means of the cooperation between the at least one first annular protrusion 110 and the at least one second annular protrusion 112, a moving distance of the sewage or the impurity from the edge of the impeller 104 to the direction of the rotation axis 122 of the impeller 104 is further increased, and further, a blocking effect of the sewage or the impurity entering between the first face 124 and the bottom wall 120 of the volute 102 may be further improved.

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

Further, 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 millimeters.

Specifically, the distance between the second annular protrusion 112 and the adjacent first annular protrusion 110 may be set to be greater than 0 and less than or equal to 0.2 mm. In this way, when the impeller 104 rotates, the first annular protrusion 110 and the second annular protrusion 112 cannot interfere with each other, and normal rotation of the impeller 104 is ensured. At the same time, it is also ensured that the gap between the first annular protrusion 110 and the second annular protrusion 112 is not too large, ensuring a blocking effect on sewage and impurities.

In a particular application, the width of each of the at least one first annular protrusion 110 and the at least one second annular protrusion 112 may be set to 1.5 millimeters. Accordingly, the distance between the adjacent two first annular protrusions 110 and the distance between the adjacent two second annular protrusions 112 may be set to 2mm, thereby ensuring that the second annular protrusions 112 can extend into the gaps between the adjacent two first annular protrusions 110, while the first annular protrusions 110 can also extend into the gaps between the adjacent two second annular protrusions 112.

In some embodiments, optionally, as shown in fig. 1 and 2, the vertical height of the first annular protrusion 110 increases gradually from the axis of rotation 122 to the direction of the impeller 104 away from the edge of the axis of rotation 122, and/or the vertical height of the second annular protrusion 112 increases gradually from the axis of rotation 122 to the direction of the impeller 104 away from the edge of the axis of rotation 122.

In this embodiment, the base wall 120 of the volute 102 is disposed obliquely with respect to the first face 124 of the impeller 104, and thus, when the at least one first annular protrusion 110 is disposed, the vertical height of the at least one first annular protrusion 110 also varies. Specifically, the distance between the bottom wall 120 of the volute 102 and the first face 124 gradually increases in the direction from the rotation axis 122 of the impeller 104 to the edge of the impeller 104, and thus, in this direction, the vertical height of the at least one first annular protrusion 110 gradually increases to ensure that each first annular protrusion 110 can function to reduce the distance between the bottom wall 120 of the volute 102 and the first face 124, thereby ensuring the blocking effect of the at least one first annular protrusion 110 against sewage or impurities.

Further, the vertical height of the at least one second annular protrusion 112 varies when the at least one second annular protrusion 112 is disposed based on the bottom wall 120 of the volute 102 being disposed obliquely with respect to the first face 124 of the impeller 104. Specifically, the distance between the bottom wall 120 of the volute 102 and the first face 124 gradually increases in the direction from the rotation axis 122 of the impeller 104 to the edge of the impeller 104, and thus, in this direction, the vertical height of the at least one second annular protrusion 112 gradually increases to ensure that each second annular protrusion 112 can function to reduce the distance between the bottom wall 120 of the volute 102 and the first face 124, thereby ensuring the blocking effect of the at least one second annular protrusion 112 against sewage or impurities.

Further, 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 millimeters, and/or the minimum distance between the second annular protrusion 112 and the first face 124 is greater than 0 and less than or equal to 0.2 millimeters.

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

Specifically, each first annular protrusion 110 is spaced from the bottom wall 120 of the volute 102 by a vertical distance greater than 0 and less than or equal to 0.2 millimeters. In practical applications, the distance between each first annular protrusion 110 and the bottom wall 120 of the volute 102 may be set to 0.1 mm.

Further, the distance between the second annular protrusion 112 and the first surface 124 may be set to minimize the distance between the second annular protrusion 112 and the first surface 124 on the basis of ensuring that the impeller 104 can normally rotate relative to the volute 102, so as to further enhance the blocking effect of the second annular protrusion 112 on sewage or impurities.

Specifically, the distance between each second annular protrusion 112 and first face 124 is greater than 0 and less than or equal to 0.2 millimeters. In practical applications, the distance between each of the second annular projections 112 and the first face 124 may be set to 0.1 mm.

In some embodiments, as shown in fig. 3 and 4, optionally, the impeller 104 is provided with a first shaft hole 114, the bottom wall 120 is provided with a second shaft hole 116, the first shaft hole 114 and the second shaft hole 116 are coaxially arranged, the gas driving device 100 further comprises a driving member 118 arranged on one side of the bottom wall 120 of the volute 102 far from the impeller 104, and a rotating shaft of the driving member 118 extends into the first shaft hole 114 through the second shaft hole 116 to be connected with the hub.

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 implement the gas driving function of the gas drive device 100. Specifically, the driving member 118 may include a rotating shaft, where the rotating shaft is connected to the impeller 104, and the driving member 118 drives the impeller 104 to rotate through the rotating shaft during the operation process, so as to realize a gas driving function.

Further, the driving member 118 is disposed outside the volute 102, specifically disposed on a side of the bottom wall 120 of the volute 102 away from the impeller 104, and correspondingly, a second shaft hole 116 is formed on the bottom wall 120 of the volute 102, so that a rotating shaft of the driving member 118 can extend into the volute 102 through the second shaft hole 116. Further, a first shaft hole 114 is formed on the impeller 104, and the rotation shaft of the driving member 118 passes through a second shaft hole 116 on the bottom wall 120 of the volute 102, extends into the volute 102, further extends into the first shaft hole 114, and is connected with the impeller 104, so as to drive the impeller 104 to rotate.

The present utility model provides a cleaning apparatus comprising a gas drive device 100 according to any one of the above-mentioned aspects.

The cleaning device provided by the utility model comprises the gas driving device 100 according to any one of the above technical schemes, so that the cleaning device has all the beneficial effects of the gas driving device 100 according to any one of the above technical schemes, and will not be described in detail herein.

Specifically, the cleaning apparatus includes a sweeping robot.

In the description of the present utility model, the term "plurality" shall mean two or more, unless otherwise explicitly defined, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus shall not be construed as limiting the present utility model, and the terms "connected", "mounted", "fixed", etc. shall be construed broadly, e.g. "connected" may be a fixed connection, may be a detachable connection, or an integral connection, may be a direct connection, or may be an indirect connection via an intermediary. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A gas driving apparatus, comprising:

a volute comprising a bottom wall;

The impeller is arranged in the volute, and is provided with a rotation axis and a first surface facing the bottom wall;

Wherein the bottom wall is inclined in a direction away from the first face from the rotation axis to an edge of the impeller away from the rotation axis.

2. A gas drive device according to claim 1, wherein the vertical distance between the edge of the impeller remote from the axis of rotation and the bottom wall of the volute is greater than 0mm and less than 2 mm.

3. A gas drive arrangement according to claim 1 or 2, wherein the impeller further comprises:

At least one first annular projection disposed on the first face, and/or

The volute also includes:

At least one second annular projection disposed on the bottom wall;

The first annular protrusion and the second annular protrusion are coaxially arranged by taking the rotation axis as a center.

4. A gas drive arrangement according to claim 3, wherein when the impeller is provided with the first annular projection, the volute is provided with the second annular projection, the first and second annular projections being offset.

5. A gas driving device according to claim 4, wherein the width of the second annular protrusion is smaller than the distance between two adjacent first annular protrusions, and the second annular protrusion protrudes into the gap between two adjacent first annular protrusions.

6. The gas drive device of claim 5, wherein a distance between the second annular protrusion and an adjacent first annular protrusion is greater than 0 and less than or equal to 0.2 millimeters.

7. A gas drive device according to claim 3, wherein the vertical height of the first annular projection increases gradually from the axis of rotation to the edge of the impeller remote from the axis of rotation, and/or

The vertical height of the second annular projection gradually increases from the rotation axis to the direction of the edge of the impeller away from the rotation axis.

8. A gas driving device according to claim 3, wherein 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 face is greater than 0 and less than or equal to 0.2 millimeters.

9. The gas driving device according to claim 1 or 2, wherein a first shaft hole is formed in the impeller, a second shaft hole is formed in the bottom wall, and the first shaft hole and the second shaft hole are coaxially arranged;

The gas driving device further comprises a driving piece, the driving piece is arranged on one side, far away from the impeller, of the bottom wall of the volute, and a rotating shaft of the driving piece penetrates through the second shaft hole to extend into the first shaft hole to be connected with the impeller.

10. A cleaning apparatus, comprising:

A gas driven apparatus as defined in any one of claims 1 to 9.