Impeller assembly for surface cleaning device and surface cleaning device

Abstract

The present disclosure provides an impeller assembly comprising: a first frame; the first open cavity is arranged on the first frame and is configured to be matched with a second frame of the impeller assembly to form a sealed cavity; an impeller; an impeller motor connected to the second frame and driving rotation of the impeller; the one or more openings are formed in the second frame and are configured to be communicated with the one or more impellers; the second open cavity is arranged on the second frame and is configured to be capable of being matched with the first frame of the impeller assembly to form a second sealed cavity; when the surface cleaning device works, a fluid channel from the opening to the second sealing cavity through the sealing cavity is formed. The filtering assembly is arranged in the second open cavity in a removable mode and is configured to prevent liquid in the fluid channel from flowing through the second sealed cavity. The utility model further provides a surface cleaning device.

Description

Technical Field

[0001] This disclosure relates to an impeller assembly for a surface cleaning device and a surface cleaning device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Home floor scrubbers use cleaning liquids to clean surfaces awaiting cleaning, thus improving the cleaning effect. Therefore, home floor scrubbers have become widely popular in recent years.

[0004] A reclining floor scrubber is a surface cleaning device that can operate normally with the main unit parallel to the ground. During operation, the main unit and cleaning head can reach into low-ceilinged spaces for cleaning, resulting in better cleaning performance and significantly improved cleaning efficiency compared to traditional floor scrubbers.

[0005] When a reclining floor scrubber is in its reclining position, the user's arm forces it to move back and forth across the surface to be cleaned. As a result, the wastewater accumulated in the dirt collection tank can easily form a surge. If the surge is too large, some liquid may enter the suction device, which can lead to a reduction in the lifespan of the motor or even its failure. Utility Model Content

[0006] To address one of the aforementioned technical problems, this disclosure provides an impeller assembly for a surface cleaning device and a surface cleaning device.

[0007] According to one aspect of this disclosure, an impeller assembly for a surface cleaning apparatus is provided, the impeller assembly comprising:

[0008] First framework;

[0009] A first open cavity is disposed on the first frame and configured to cooperate with a second frame of the impeller assembly to form a sealed cavity;

[0010] The impeller is rotatably connected to the second frame;

[0011] An impeller motor is connected to the second frame and configured to drive the rotation of the impeller;

[0012] One or more openings are provided on the second frame and configured to communicate with the one or more impellers;

[0013] A second open cavity is disposed on the second frame and configured to cooperate with the first frame of the impeller assembly to form a second sealed cavity;

[0014] When the surface cleaning device is in operation, a fluid passage is formed from the opening, through the sealed cavity, to the second sealed cavity;

[0015] A valve assembly is disposed normally closed between the sealing cavity and the second sealing cavity to isolate the sealing cavity and the second sealing cavity; the valve assembly is configured to open unidirectionally along the direction of the fluid passage under the action of airflow.

[0016] According to one example of this disclosure, the valve assembly includes a valve plate and a reset member, the valve plate being pivotally connected to the first frame and, under the action of the reset member, normally closing the sealing cavity and the second sealing cavity.

[0017] According to one example of this disclosure, a filter chamber is also included, disposed on the second frame and located downstream of the airflow of the second open cavity, wherein a removable second filter element is disposed within the filter chamber.

[0018] According to one example of this disclosure, the second filter assembly includes filter cotton or a HEPA filter.

[0019] According to one example of this disclosure, a second opening is included, which is disposed on the second frame and in fluid communication with the filter chamber, and a vacuum motor configured as a surface cleaning device provides vacuum suction to the impeller assembly through the second opening.

[0020] According to another aspect of this disclosure, a surface cleaning apparatus is provided, comprising:

[0021] main body;

[0022] A vacuum motor, located within the main body, is configured to provide vacuum suction for the surface cleaning device.

[0023] An impeller assembly, located upstream of the vacuum motor, is configured to prevent liquid from entering the vacuum motor.

[0024] The impeller assembly includes:

[0025] First framework;

[0026] A first open cavity is disposed on the first frame and configured to cooperate with a second frame of the impeller assembly to form a sealed cavity;

[0027] The impeller is rotatably connected to the second frame;

[0028] An impeller motor is connected to the second frame and configured to drive the rotation of the impeller;

[0029] One or more openings are provided on the second frame and configured to communicate with the one or more impellers;

[0030] A second open cavity is disposed on the second frame and configured to cooperate with the first frame of the impeller assembly to form a second sealed cavity;

[0031] When the surface cleaning device is in operation, a fluid passage is formed from the opening, through the sealed cavity, to the second sealed cavity;

[0032] A valve assembly is disposed normally closed between the sealing cavity and the second sealing cavity to isolate the sealing cavity and the second sealing cavity; the valve assembly is configured to open unidirectionally along the direction of the fluid passage under the action of airflow.

[0033] According to one example of this disclosure, the valve assembly includes a valve plate and a reset member, the valve plate being pivotally connected to the first frame and, under the action of the reset member, normally closing the sealing cavity and the second sealing cavity.

[0034] According to one example of this disclosure, a filter chamber is also included, disposed on the second frame and located downstream of the airflow of the second open cavity, wherein a removable second filter element is disposed within the filter chamber.

[0035] According to one example of this disclosure, the first frame and the second frame are detachably connected, and the first frame is fixedly disposed on the body.

[0036] According to one example of this disclosure, a second opening is included, which is disposed on the second frame and in fluid communication with the filter chamber, and is configured such that the vacuum motor provides vacuum suction to the impeller assembly through the second opening. Attached Figure Description

[0037] The accompanying drawings illustrate exemplary examples of this disclosure and, together with its description, serve to explain the principles of this disclosure. These drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this specification.

[0038] Figure 1 This is a perspective view of a surface cleaning apparatus according to an example of the present disclosure.

[0039] Figure 2 This is a front view of an impeller assembly according to an example of this disclosure.

[0040] Figure 3 This is an exploded view of an impeller assembly according to an example of this disclosure.

[0041] Figure 4 This is an exploded schematic diagram of an impeller assembly according to an example of this disclosure from another angle.

[0042] Figure 5 This is a schematic side sectional view of an impeller assembly according to an example of this disclosure.

[0043] Figure 6 This is a schematic side cross-sectional view of the first frame of an impeller assembly according to an example of this disclosure.

[0044] Figure 7 This is a perspective view of a first frame of an impeller assembly according to an example of this disclosure, wherein the valve plate is in the closed state.

[0045] Figure 8 This is a perspective view of a first frame of an impeller assembly according to an example of this disclosure, wherein the valve plate is in the open state. Detailed Implementation

[0046] The present disclosure will now be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0047] It should be noted that, where there is no conflict, the examples and features in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and examples.

[0048] Unless otherwise stated, the exemplary examples shown are to be understood as providing exemplary features of various details that provide some ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of the various examples may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0049] The use of crosshairs and / or shading in accompanying drawings is generally used to clarify the boundaries between adjacent parts. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, scale, commonalities between the parts shown, or any other characteristics, properties, etc., of the parts. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of parts may be exaggerated for clarity and / or descriptive purposes. A specific process sequence may be performed in a different order than that described when exemplary examples can be implemented differently. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Moreover, the same reference numerals denote the same parts.

[0050] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0051] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0052] The terminology used herein is for the purpose of describing specific examples and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not preclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent deviations in measurements, calculations, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0053] The surge of wastewater during the operation of reclining floor scrubbers is the main cause of vacuum motor failure in current reclining floor scrubbers. Although existing technologies use surge protection devices and / or gas-liquid separator impellers to keep wastewater droplets within the dirt collection tank as much as possible, it is still inevitable that some liquid will escape into the vacuum motor, causing it to fail.

[0054] The technical solution disclosed herein further reduces the possibility of liquid entering the vacuum motor by installing a waterproof filter component in the airflow passage between the dirt storage tank and the vacuum motor outlet. This is because, during the operation of the floor scrubber, especially during the lying-down operation, the liquid that escapes after being filtered by the impeller assembly is intercepted by the waterproof filter component, thereby ensuring the service life of the floor scrubber.

[0055] Figure 1 In one example shown, a surface cleaning device 200 with an impeller assembly 100 is depicted, comprising:

[0056] The cleaning liquid storage unit 202 is used to store cleaning liquid (clean water or a mixture of cleaning agent and water, etc.); the cleaning base 204 is able to receive the cleaning liquid provided by the cleaning liquid storage unit 202 for wet cleaning of the surface to be cleaned; in one example, the cleaning liquid storage unit 202 is located on the cleaning base 204 to lower the overall center of gravity of the surface cleaning device 200; the recovery storage unit 206 is able to collect the solid / liquid / solid-liquid mixture generated by the cleaning base 204 during wet cleaning of the surface to be cleaned.

[0057] In one example of this disclosure, the surface cleaning device 200 further includes an impeller assembly 100; the impeller assembly 100 is disposed on the main frame of the surface cleaning device 200, and when the recovery storage unit 206 is mounted on the main body of the surface cleaning device 200, at least a portion of the impeller assembly 100 is located in the recovery storage unit 206, so as to be able to be used to separate solid / liquid / solid-liquid mixtures from gases in the fluid of the recovery storage unit 206;

[0058] The surface cleaning device 200 also includes a vacuum assembly 208, which is used to draw in the gas separated by the impeller assembly 100 and discharge the gas to the outside of the surface cleaning device 200; wherein, the impeller assembly 100 forms a gas flow path, and the gas separated by the impeller assembly 100 enters the vacuum assembly 208 through the gas flow path.

[0059] like Figure 2-8 As shown, according to an example of the present disclosure, the impeller assembly 100 of the present disclosure includes: a frame portion 102 disposed on the frame of the surface cleaning device 200; an impeller 104 rotatably disposed on the frame portion 102; and an impeller motor 106 disposed on the frame portion 102 and capable of driving the impeller 104 to rotate.

[0060] The impeller 104 has an upstream fluid side and a downstream fluid side, and includes a rotating edge portion located between the upstream and downstream fluid sides. An impeller motor 106 is coaxially arranged with the impeller 104 along the same axis, and at least a portion of the impeller motor 106 is located within the space formed by the rotating edge portion and the downstream fluid side. The surface cleaning apparatus 200 of this disclosure, by providing the impeller assembly 100, can separate the liquid and gas in the recovery storage section 206, reducing residual droplets in the airflow entering the vacuum assembly.

[0061] In some examples of this disclosure, the impeller 104 of the impeller assembly 100 of this disclosure forms fluid filtration from the upstream side to the downstream side of the fluid when rotating, in order to perform separation of solid / liquid / solid-liquid mixtures in the fluid of the recovery storage unit 206 from gases in the fluid.

[0062] In some examples of this disclosure, the frame portion 102 of the impeller assembly 100 is composed of a first frame 1021 and a second frame 1022. The impeller motor 106 and the impeller 104 are supported on the frame portion 102, and the structural design of the frame portion 102 creates a receiving space between the first frame 1021 and the second frame 1022, the receiving space being at least used to accommodate the impeller motor 106. In one example, the first frame 1021 is fixed to or formed as part of the main body of the surface cleaning device 200, and the second frame 1022 is removably fixed to the first frame 1021.

[0063] In some examples of this disclosure, preferably, the receiving space formed by the first frame 1021 and the second frame 1022 includes an impeller motor receiving cavity 1061 and an open cavity formed outside the impeller motor receiving cavity 1061, the impeller motor receiving cavity 1061 being formed within the second frame 1022 to house the impeller motor 106. In some examples of this disclosure, the impeller motor receiving cavity 1061 is formed by a wall 10221 extending from the second frame 1022 along the longitudinal axis of the impeller motor 106. When the second frame 1022 is mounted on the first frame 1021, the free edge 10222 of the wall 10221 engages with the receiving portion 10211 located in the first frame 1021, thus forming an isolation within the first frame 1021 and the second frame 1022, separating the impeller motor 106 from the airflow channel formed by the open cavity to prevent moisture erosion of the impeller motor 106. The impeller motor receiving cavity 1061 preferably has a matching shape with the impeller motor 106 to stably house the impeller motor 106. In one example, the wall 10221 forming the impeller motor receiving cavity 1061 is cylindrical to match the outer contour of the impeller motor.

[0064] like Figure 3 and 4 and combined Figure 5 In one or more examples of this disclosure, the open cavity includes a first open cavity A, which is disposed on the first frame 1021 and configured to cooperate with the second frame 1022 of the impeller assembly to form a sealed cavity C. In one example of this disclosure, the first open cavity A is formed at least by an outwardly extending wall 10212 on the inner wall of the first frame 1021. In some examples of this disclosure, a receiving fitting portion 10223 is formed on the inner wall of the second frame 1022. The receiving fitting portion 10223 may be in the form of a sealing groove, so that the free edge of the wall 10212 formed by the first frame 1021 can be embedded into the receiving fitting portion 10223, thereby fluidly isolating the impeller motor receiving cavity 1061 of the receiving space from the sealed cavity C, and forming a fluid-sealed airflow channel between the sealed cavity C and the outside of the impeller assembly frame portion.

[0065] In one or more embodiments of this disclosure, the aforementioned open cavity further includes a second open cavity B. The second open cavity B is disposed on the second frame 1022 and configured to engage with the first frame 1021 of the impeller assembly to form a second sealed cavity D. In one embodiment of this disclosure, the second open cavity B is formed at least by an inwardly recessed groove 10224 on the inner wall of the second frame 1022; in some embodiments of this disclosure, a receiving fitting portion 10223 formed on the inner wall of the second frame 1022 extends and surrounds the groove 10224, such that the free edge 10222 of the wall 10212 formed with the first frame 1021 can be embedded into the receiving fitting portion 10223, thereby forming a fluid-sealed second sealed cavity D relative to the outside of the second open cavity B, while maintaining fluid communication with the sealed cavity C, thus forming a sealed airflow channel composed of the sealed cavity C and the second sealed cavity D.

[0066] The impeller 104 preferably has a plurality of separation blades evenly distributed along the circumference of the impeller 104, which constitute the rotating edge portion of the impeller 104, and there are blade gaps between each separation blade.

[0067] In some examples of the surface cleaning apparatus 200 with impeller assembly 100 disclosed herein, a filter assembly 108 is provided in the fluid passage between vacuum assembly 208 and impeller assembly 100 to filter the flowing fluid (to remove solid / liquid / solid-liquid mixtures from the fluid). The filter assembly 108 may be a HEPA filter or filter cotton to perform filtration of the flowing fluid.

[0068] In some examples of this disclosure, the impeller assembly 100 also includes a filter chamber formed on the second frame 1022 to displace the filter assembly 108. In one example, the filter assembly 108 includes an operable portion through which it is detachably mounted within the filter chamber.

[0069] Based on the above-mentioned configuration of the accommodating space, the sealing cavity C and the second sealing cavity D between the first frame 1021 and the second frame 1022 form a fluid passage on the downstream side of the fluid, so that the fluid (gas) separated by the impeller 104 can be discharged to the outside of the surface cleaning device 200 in sequence through the blade gap, the opening O formed on the second frame 1022, the sealing cavity, the second sealing cavity D and the filter cavity.

[0070] The surface cleaning device of this disclosure can be used in a reclining position, which makes operation more effortless. In a preferred embodiment, the recovery and storage section 206 is disposed behind the main body; relatively speaking, the recovery and storage section 206 is located on the rear side of the main body, and when the surface cleaning device of this disclosure reclines, the disturbance of liquid in the recovery and storage section 206 is minimized; at this time, when the main body is supported on the surface to be cleaned in a flat position, one surface (rear surface) of the recovery and storage section 206 is set close to the surface to be cleaned, and the impeller assembly is away from the surface to be cleaned relative to the recovery and storage section 206. The surface cleaning device of this disclosure is easier to operate, especially during cleaning operations, as the lower center of gravity of the surface cleaning device improves the user experience.

[0071] When the surface cleaning apparatus of this disclosure is in a reclining position, a mixture of gas and liquid containing dirt particles is drawn into the recovery storage unit 206. In one example, a solid-liquid separator (not shown) is provided in the recovery storage unit 206 to trap solids. Next, the impeller 104 is rotated by the rotation of the impeller motor 106, thereby separating the recovered gas and liquid. The liquid remains in the recovery storage unit 206, while the gas is filtered by the filter assembly 108 and discharged from the surface cleaning apparatus.

[0072] Actual testing revealed that although the gas-liquid separation device in the airflow channel, including the impeller 104 and impeller motor 106, can retain most of the liquid in the recovery and storage section 206 of the surface cleaning device before it enters the vacuum assembly 208, during the operation of the surface cleaning device, especially in the aforementioned reclining position, liquid surges occur in the recovery and storage section 206 due to the user's reciprocating operation of the surface cleaning device. Inevitably, some liquid escapes downstream of the impeller 104 and enters the filter assembly 108. When the filter assembly 108 becomes saturated with liquid, some liquid will enter the vacuum assembly 208 under the action of the vacuum force. The vacuum assembly 208 typically includes a suction motor. When liquid enters the suction motor, it affects the service life of the suction motor, which directly determines the service life of the surface cleaning device.

[0073] To further prevent liquid escape, a valve assembly 300 is installed in the passageway between the aforementioned sealed cavity C and the second sealed cavity D. The valve assembly 300 indicates that, unless the assembly fails due to damage, breakage, or other reasons, liquid W will essentially not enter the second sealed cavity D during normal use. In the airflow path, the valve assembly 300 is located downstream of the impeller assembly 100 and upstream of the filter assembly 108. The filtered airflow containing a small amount of liquid droplets flows to the valve assembly 300 for filtration. The airflow filtered by the valve assembly 300 is then further filtered by the filter assembly 108, and finally discharged through the second opening 400. The second opening 400 is located on the second frame 1022 and is in fluid communication with the filter cavity. The vacuum motor of the surface cleaning device provides vacuum suction to the impeller assembly through the second opening 400.

[0074] In one example, the sealing cavity C and the second sealing cavity D form an airflow passage, and then the valve assembly 300 is placed into the airflow passage. A sealing ring is formed around the valve assembly 300, and a seal is provided along the circumferential direction to prevent droplets from escaping from the valve assembly 300 in the circumferential direction.

[0075] In one example, valve assembly 300 is a one-way venting element, which can be in the form of a one-way valve. The one-way valve includes a valve plate 301 and a reset member 302. The valve plate 301 remains normally closed under the action of the reset member 302. In one example, the valve plate 301 is pivotally connected to the first frame 1021, and the reset member 302 applies force to the valve plate 301 to abut the edge of the valve plate with a sealing ring against the cross section of the aforementioned airflow channel, forming a liquid seal. In the non-operating state, residual accumulated liquid W can be intercepted by the valve plate 301, preventing it from entering the second sealed cavity D. The accumulated liquid W has gravity, and when the surface cleaning equipment returns to an upright position, the accumulated liquid W flows back from the second sealed cavity D through one or more openings O on the second frame to the recovery storage section 206 under the action of gravity, thereby avoiding the risk of liquid entering the sealed cavity C and thus the vacuum assembly 208 when switching between lying and upright positions.

[0076] The valve plate 301 can be configured to open passively around a pivot axis, requiring it to overcome the restoring force of the reset element 302 when opening. The restoring force can be appropriately configured so that when the vacuum motor of the surface cleaning equipment is energized, the pressure of the vacuum airflow F will open the valve plate 301 to facilitate airflow, while any remaining small amount of liquid droplets will be absorbed by the filter assembly 108. Compared to not having a normally closed valve plate, this significantly reduces the risk of failure of the vacuum assembly 208.

[0077] In the description of this specification, the references to terms such as "an example / method," "some examples / methods," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that example / method or example is included in at least one example / method or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same example / method or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more examples / methods or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different examples / methods or examples described in this specification, as well as the features of different examples / methods or examples.

[0078] Those skilled in the art should understand that the above examples are merely for illustrative purposes and are not intended to limit the scope of this disclosure. Other changes or modifications can be made based on the above disclosure by those skilled in the art, and such changes or modifications shall still fall within the scope of this disclosure.

Claims

1. An impeller assembly for a surface cleaning device, characterized in that, The impeller assembly includes: First framework; A first open cavity is disposed on the first frame and configured to cooperate with a second frame of the impeller assembly to form a sealed cavity; The impeller is rotatably connected to the second frame; An impeller motor is connected to the second frame and configured to drive the rotation of the impeller; One or more openings are provided on the second frame and configured to communicate with the one or more impellers; A second open cavity is disposed on the second frame and configured to cooperate with the first frame of the impeller assembly to form a second sealed cavity; When the surface cleaning device is in operation, a fluid passage is formed from the opening, through the sealed cavity, to the second sealed cavity; A valve assembly is disposed normally closed between the sealing cavity and the second sealing cavity to isolate the sealing cavity and the second sealing cavity; the valve assembly is configured to open unidirectionally along the direction of the fluid passage under the action of airflow.

2. The impeller assembly according to claim 1, characterized in that, The valve assembly includes a valve plate and a reset member. The valve plate is pivotally connected to the first frame and, under the action of the reset member, normally closes the sealing cavity and the second sealing cavity.

3. The impeller assembly according to claim 1, characterized in that, It also includes a filter chamber disposed on the second frame and located downstream of the airflow of the second open cavity, wherein a removable second filter element is disposed in the filter chamber.

4. The impeller assembly according to claim 3, characterized in that, The second filter element includes filter cotton or a HEPA filter.

5. The impeller assembly according to claim 3, characterized in that, Includes a second opening, which is disposed on the second frame and in fluid communication with the filter chamber. A vacuum motor configured as a surface cleaning device provides vacuum suction to the impeller assembly through the second opening.

6. A surface cleaning device, characterized in that, include: main body; A vacuum motor, located within the main body, is configured to provide vacuum suction for the surface cleaning device. An impeller assembly, located upstream of the vacuum motor, is configured to prevent liquid from entering the vacuum motor. The impeller assembly includes: First framework; A first open cavity is disposed on the first frame and configured to cooperate with a second frame of the impeller assembly to form a sealed cavity; The impeller is rotatably connected to the second frame; An impeller motor is connected to the second frame and configured to drive the rotation of the impeller; One or more openings are provided on the second frame and configured to communicate with the one or more impellers; A second open cavity is disposed on the second frame and configured to cooperate with the first frame of the impeller assembly to form a second sealed cavity; When the surface cleaning device is in operation, a fluid passage is formed from the opening, through the sealed cavity, to the second sealed cavity; A valve assembly is disposed normally closed between the sealing cavity and the second sealing cavity to isolate the sealing cavity and the second sealing cavity; the valve assembly is configured to open unidirectionally along the direction of the fluid passage under the action of airflow.

7. The surface cleaning device according to claim 6, characterized in that, The valve assembly includes a valve plate and a reset member. The valve plate is pivotally connected to the first frame and, under the action of the reset member, normally closes the sealing cavity and the second sealing cavity.

8. The surface cleaning device according to claim 6, characterized in that, It also includes a filter chamber disposed on the second frame and located downstream of the airflow of the second open cavity, wherein a removable second filter element is disposed in the filter chamber.

9. The surface cleaning device according to claim 6, characterized in that, The first frame and the second frame are detachably connected, and the first frame is fixedly mounted on the main body.

10. The surface cleaning apparatus according to claim 8, characterized in that, It includes a second opening, which is disposed on the second frame and in fluid communication with the filter chamber, and is configured such that the vacuum motor provides vacuum suction to the impeller assembly through the second opening.

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