Blowback device and vacuum cleaner

Abstract

A blowback device and a vacuum cleaner. The blowback device is applied to a vacuum cleaner. The vacuum cleaner has a collection chamber. The vacuum cleaner further comprises a fan assembly. The fan assembly comprises a ventilation shell (110). The ventilation shell (110) is provided with air suction holes (160) and air outlet holes (170). The air suction holes (160) are configured for extracting air from the collection chamber. The air outlet holes (170) are used for discharging air. The blowback device is configured to be sleeved on the ventilation shell (110) and comprises an inner cylinder (120) and an outer cylinder (130). The inner cylinder (120) is located in the collection chamber. The inner cylinder (120) is provided with an inner cavity (140). The inner cavity (140) is communicated with the air suction holes (160) of the ventilation shell (110). An air outlet (190) is formed on a side surface of the inner cylinder (120). The outer cylinder (130) is connected to the inner cylinder (120) and is located outside the collection chamber. The outer cylinder (130) is provided with an outer cavity (150). The outer cavity (150) is communicated with the air outlet holes (170) of the ventilation shell (110). A first sealing ring (180) is provided between the outer cavity (150) and the inner cavity (140). An air suction port (200) is provided on a side surface of the outer cylinder (130). The air suction port (200) is communicated with the inner cavity (140). The air outlet (190) is communicated with the outer cavity (150). The blowback device has a simple structure, is easy to operate for a user, involves low production costs, is very practical, and makes use of power generated by the fan of the vacuum cleaner without requiring an additional external power source, thereby saving more resources.

Description

Backflush device and vacuum cleaner Technical Field

[0001] The present application relates to the field of dust removal equipment, and in particular to a backflush device and a dust collector. Background Art

[0002] With the rapid development of small household appliance technology and the continuous improvement of people's living standards, vacuum cleaners have become one of the essential appliances in people's daily lives. Vacuum cleaners are of various types, including horizontal vacuum cleaners, vertical vacuum cleaners, and handheld vacuum cleaners. Handheld vacuum cleaners are compact and very convenient to carry and use. They are mainly used for cleaning in cars, but they are also effective for cleaning keyboards, electrical appliances, etc.

[0003] The structure of a handheld vacuum cleaner includes a fan assembly located at the rear of the vacuum cleaner body and a filter cover mounted on a ventilation housing of the fan assembly. The ventilation housing has an air intake hole located inside the vacuum cleaner and an air outlet hole located outside the vacuum cleaner. The working principle is to draw air inside the vacuum cleaner through the fan and discharge it through the filter cover at the rear, thereby achieving the purpose of dust collection. However, due to the internal structure of the handheld vacuum cleaner currently sold on the market, dust easily accumulates inside the vacuum cleaner and is difficult to clean.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a backflush device and a vacuum cleaner, which can change the direction of air flow inside a handheld vacuum cleaner to achieve the purpose of cleaning dust inside the vacuum cleaner.

[0006] According to a first aspect of the present application, a backflush device is provided, which is applied to a vacuum cleaner, wherein the vacuum cleaner has a dust suction chamber, the vacuum cleaner also includes a fan assembly, the fan assembly includes a ventilation shell, the ventilation shell has an air suction hole and an air outlet hole, the air suction hole is used to extract air from the dust suction chamber, and the air outlet hole is used to exhaust air, and is characterized in that it is used to be sleeved on the ventilation shell, and includes:

[0007] An inner cylinder is located inside the dust suction chamber, the inner cylinder is provided with an inner cavity, the inner cavity is communicated with the air suction hole of the ventilation shell, and an air outlet is provided on the side of the inner cylinder;

[0008] The outer cylinder is connected to the inner cylinder and is located outside the dust suction chamber. The outer cylinder is provided with an outer cavity, and the outer cavity is connected to the air outlet of the ventilation shell. A first sealing ring is provided between the outer cavity and the inner cavity. The side of the outer cylinder is provided with an air suction port, and the air suction port is connected to the inner cavity, and the air outlet is connected to the outer cavity.

[0009] The above-mentioned back-blowing device has at least the following beneficial effects: when cleaning is required, the back-blowing device is used to replace the filter cover of the vacuum cleaner and is mounted on the ventilation shell, the inner cylinder is located inside the dust suction chamber, the inner cavity of the inner cylinder is connected to the air suction hole of the fan, the outer cavity of the outer cylinder is connected to the air suction hole of the fan, and a first sealing ring is provided between the inner cavity and the outer cavity to separate the inner cavity and the outer cavity. Since the side of the inner cylinder is provided with an air outlet, the air outlet is connected to the outer cavity, and the side of the outer cylinder is provided with an air suction port, the air suction port is connected to the inner cavity, so after the vacuum cleaner is equipped with the back-blowing device, the suction component is changed to suck air from the air suction port of the outer cylinder, discharge air from the air outlet of the inner cylinder, and then blow it into the dust suction chamber, thereby changing the air flow direction inside the handheld vacuum cleaner, thereby achieving the purpose of cleaning the dust inside the machine. The back-blowing device has a simple structure, is easy for users to operate, has a very low production cost, and is very practical. It fully utilizes the power generated by the vacuum cleaner's own fan, does not require external power, and is more resource-saving.

[0010] According to the back-flushing device described in the first aspect of the present application, the outer cylinder is provided with a slot for engaging the tail of the vacuum cleaner on one side of the inner cylinder.

[0011] Advantageously, the provision of the card slot facilitates installation of the inner cylinder from the rear end of the vacuum cleaner into the interior of the vacuum cleaner, while also playing a role in fixing the inner cylinder.

[0012] According to the backflush device described in the first aspect of the present application, the diameter of the outer cavity is greater than the diameter of the inner cavity.

[0013] Advantageously, such an arrangement allows an air outlet channel to be provided on the side wall of the inner cylinder, which facilitates the communication between the air outlet on the side of the inner cylinder and the outer cavity.

[0014] According to the backflush device described in the first aspect of the present application, the inner cylinder is provided with a convex ring extending to the outer cavity, and the convex ring is used to install the first sealing ring.

[0015] Advantageously, the provision of the convex ring facilitates installation of the first sealing ring, thereby ensuring sealing between the inner cavity and the outer cavity.

[0016] According to the back-blowing device described in the first aspect of the present application, the end of the outer cylinder facing away from the inner cylinder is provided with a heat dissipation port that cooperates with the end face of the fan, and the heat dissipation port is provided with a second sealing ring.

[0017] Advantageously, the heat dissipation port can expose the end face of the fan to the outside to dissipate heat, and the second sealing ring can isolate the external air to ensure the sealing of the outer cavity.

[0018] According to the back-blowing device described in the first aspect of the present application, an air outlet channel is provided on the side wall of the inner cylinder, and the air outlet is connected to the outer cavity through the air outlet channel.

[0019] Advantageously, an air outlet channel is provided on the side wall of the inner cylinder, which has a compact structure and ensures that the air outlet is connected with the outer cavity.

[0020] According to the back-blowing device described in the first aspect of the present application, a suction channel is provided on the side wall of the outer cylinder, and the suction port is connected to the inner cavity through the suction channel.

[0021] Advantageously, an air suction channel is provided on the side wall of the outer cylinder, which has a compact structure and ensures that the air suction port is connected with the inner cavity.

[0022] According to the back-blowing device described in the first aspect of the present application, there are two air outlets, two air suction ports, and the air outlets are spaced apart from the air suction ports.

[0023] The benefit is that the two air outlets and the two air intakes are arranged at intervals, which is conducive to increasing the air outlet and air intake volume, thereby achieving the best effect of cleaning the dust inside the vacuum cleaner.

[0024] According to the back-blowing device described in the first aspect of the present application, a support plate is provided in the middle of the air outlet and the middle of the air suction port.

[0025] Advantageously, the support plate can play a supporting role, thereby improving the structural strength of the air outlet and the air intake and preventing deformation.

[0026] According to a second aspect of the present application, a vacuum cleaner is provided, comprising the back-flushing device as described in the first aspect of the present application.

[0027] The vacuum cleaner described above has at least the following beneficial effects: the vacuum cleaner includes a backflush device. When cleaning is required, the backflush device replaces the vacuum cleaner's filter cover and fits over the ventilation housing. The suction assembly then draws air from the suction port of the outer cylinder and discharges it from the air outlet of the inner cylinder, which is then blown into the dust collection chamber. This redirects the air flow within the handheld vacuum cleaner, thereby cleaning the dust inside the machine. The backflush device has a simple structure, is easy to operate, has a very low production cost, and is very practical. It fully utilizes the power generated by the vacuum cleaner's own fan, requiring no external power source, thus further conserving resources.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] FIG1 is a schematic diagram of an embodiment of the present application;

[0031] FIG2 is an exploded schematic diagram of FIG1 ;

[0032] FIG3 is a cross-sectional view of the air outlet at AA in FIG1 ;

[0033] FIG4 is a cross-sectional view of the air suction port at point BB in FIG1 .

[0034] Figure markings: ventilation shell 110, inner tube 120, outer tube 130, inner cavity 140, outer cavity 150, air suction hole 160, air outlet hole 170, first sealing ring 180, air outlet 190, air suction port 200, slot 210, convex ring 220, heat dissipation port 230, second sealing ring 240, air outlet channel 250, air suction channel 260, support plate 270. DETAILED DESCRIPTION

[0035] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0036] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do 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, they cannot be understood as limitations on this application.

[0037] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0038] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0039] The back-flushing device and the dust collector are described in detail below with reference to Figures 1 to 4 using a specific embodiment. It is worth noting that the following description is merely illustrative and not intended to limit the scope of the present invention.

[0040] As shown in Figures 1 to 4, a back-blowing device is used on a vacuum cleaner. The vacuum cleaner has a dust suction chamber (the structure of the vacuum cleaner and the dust suction chamber is not shown in the figure). The vacuum cleaner also includes a fan assembly. The fan assembly (the fan assembly only shows the ventilation shell, and the internal parts are not shown) includes a ventilation shell 110. The ventilation shell 110 has an air suction hole 160 and an air outlet hole 170. The air suction hole 160 is used to exhaust air from the dust suction chamber, and the air outlet hole 170 is used to exhaust air. The back-blowing device is used to be mounted on the ventilation shell 110, and includes an inner cylinder 120 and an outer cylinder 130. Among them, the inner cylinder 120 is located inside the dust suction chamber, and the inner cylinder 120 is provided with an inner cavity 140, which is connected to the air suction hole 160 of the ventilation shell 110, and an air outlet 190 is provided on the side of the inner cylinder 120; the outer cylinder 130 is connected to the inner cylinder 120, and is located outside the dust suction chamber, and the outer cylinder 130 is provided with an outer cavity 150, which is connected to the air outlet 170 of the ventilation shell 110, and a first sealing ring 180 is provided between the outer cavity 150 and the inner cavity 140, and an air suction port 200 is provided on the side of the outer cylinder 130, which is connected to the inner cavity 140, and the air outlet 190 is connected to the outer cavity 150.

[0041] When cleaning is needed, the back-blowing device is used to replace the filter cover of the vacuum cleaner and is mounted on the ventilation shell 110. The inner cylinder 120 is located inside the dust collection chamber. The inner cavity 140 of the inner cylinder 120 is connected to the air suction hole 160 of the fan, and the outer cavity 150 of the outer cylinder 130 is connected to the air suction hole 160 of the fan. A first sealing ring 180 is provided between the inner cavity 140 and the outer cavity 150 to separate the inner cavity 140 and the outer cavity 150. Since the side of the inner cylinder 120 is provided with a The outer tube 130 has an air outlet 190 that communicates with the outer chamber 150. The outer tube 130 is provided with an air intake 200 on its side that communicates with the inner chamber 140. Therefore, after the vacuum cleaner is equipped with the back-flushing device, the suction assembly draws air from the air intake 200 of the outer tube 130 and discharges it from the air outlet 190 of the inner tube 120, which is then blown into the dust collection chamber. This changes the direction of air flow within the handheld vacuum cleaner, thereby achieving the purpose of cleaning dust inside the machine. The back-flushing device has a simple structure, is easy for users to operate, has a very low production cost, and is very practical. It fully utilizes the power generated by the vacuum cleaner's own fan, does not require external power, and is more resource-efficient.

[0042] As shown in Figures 1 and 2, the outer cylinder 130 is provided with a slot 210 for clamping the tail of the vacuum cleaner on one side of the inner cylinder 120. The slot 210 is provided to facilitate the installation of the inner cylinder 120 from the tail of the vacuum cleaner into the interior of the vacuum cleaner and to fix it.

[0043] Specifically, the diameter of the outer cavity 150 is greater than the diameter of the inner cavity 140. This arrangement allows an air outlet channel 250 to be provided on the side wall of the inner cylinder 120, which facilitates communication between the air outlet 190 on the side of the inner cylinder 120 and the outer cavity 150.

[0044] As shown in Figure 4, the inner cylinder 120 is provided with a protruding ring 220 extending to the outer cavity 150. The protruding ring 220 is used to install the first sealing ring 180. The protruding ring 220 facilitates the installation of the first sealing ring 180 and ensures the sealing between the inner cavity 140 and the outer cavity 150.

[0045] In addition, the end of the outer cylinder 130 facing away from the inner cylinder 120 is provided with a heat dissipation vent 230 that mates with the end face of the fan. The heat dissipation vent 230 is provided with a second sealing ring 240. The heat dissipation vent 230 allows the end face of the fan to be exposed to the outside, thereby dissipating heat. The second sealing ring 240 isolates the external air and ensures the sealing of the outer cavity 150.

[0046] As shown in Figures 3 and 4, the sidewall of the inner cylinder 120 is provided with an air outlet channel 250, through which the air outlet 190 communicates with the outer cavity 150. The provision of the air outlet channel 250 on the sidewall of the inner cylinder 120 creates a compact structure and ensures that the air outlet 190 communicates with the outer cavity 150. Correspondingly, the sidewall of the outer cylinder 130 is provided with an air suction channel 260, through which the air suction port 200 communicates with the inner cavity 140. The provision of the air suction channel 260 on the sidewall of the outer cylinder 130 creates a compact structure and ensures that the air suction port 200 communicates with the inner cavity 140.

[0047] Specifically, as shown in Figures 1 and 2, there are two air outlets 190 and two air suction ports 200, and the air outlets 190 and the air suction ports 200 are spaced apart. The two air outlets 190 and the two air suction ports 200 are spaced apart to increase the air volume and air volume, thereby achieving the best effect of cleaning the dust inside the vacuum cleaner.

[0048] It is worth mentioning that a support plate 270 is provided in the middle of the air outlet 190 and the middle of the air inlet 200. The support plate 270 can play a supporting role, improve the structural strength of the air outlet 190 and the air inlet 200, and prevent deformation.

[0049] The vacuum cleaner of the present application includes the aforementioned back-blowing device. When cleaning is required, the back-blowing device is used to replace the filter cover of the vacuum cleaner and fit over the ventilation housing 110. The suction assembly then sucks air from the suction port 200 of the outer cylinder 130 and discharges air from the air outlet 190 of the inner cylinder 120, which is then blown into the dust collection chamber. This changes the direction of air flow within the handheld vacuum cleaner, thereby achieving the purpose of cleaning dust inside the machine. The back-blowing device has a simple structure, is easy for users to operate, has a very low production cost, and is very practical. It fully utilizes the power generated by the vacuum cleaner's own fan, does not require external power, and is more resource-efficient.

[0050] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A back-blowing device, applied to a vacuum cleaner, the vacuum cleaner having a dust suction chamber, the vacuum cleaner further comprising a fan assembly, the fan assembly comprising a ventilation shell (110), the ventilation shell (110) having an air suction hole (160) and an air outlet hole (170), the air suction hole (160) being used to extract air from the dust suction chamber, and the air outlet hole (170) being used to exhaust air, characterized in that: include: An inner cylinder (120) is located inside the dust suction chamber, the inner cylinder (120) is provided with an inner cavity (140), the inner cavity (140) is communicated with the air suction hole (160) of the ventilation shell (110), and an air outlet (190) is provided on the side of the inner cylinder (120); The outer cylinder (130) is connected to the inner cylinder (120) and is located outside the dust suction chamber. The outer cylinder (130) is provided with an outer chamber (150). The outer chamber (150) is connected to the air outlet (170) of the ventilation shell (110). A first sealing ring (180) is provided between the outer chamber (150) and the inner chamber (140). The side of the outer cylinder (130) is provided with an air suction port (200). The air suction port (200) is connected to the inner chamber (140), and the air outlet (190) is connected to the outer chamber (150).

2. The backflush device according to claim 1, characterized in that: The outer cylinder (130) is provided with a slot (210) for clamping the rear end of the vacuum cleaner on one side of the inner cylinder (120).

3. The backflush device according to claim 1, characterized in that: The diameter of the outer cavity (150) is greater than the diameter of the inner cavity (140).

4. The backflush device according to claim 3, characterized in that: The inner cylinder (120) is provided with a convex ring (220) extending to the outer cavity (150), and the convex ring (220) is used to install the first sealing ring (180).

5. The backflush device according to claim 1, characterized in that: The end of the outer cylinder (130) facing away from the inner cylinder (120) is provided with a heat dissipation port (230) that matches the end surface of the ventilation shell (110), and the heat dissipation port (230) is provided with a second sealing ring (240).

6. The backflush device according to claim 1, characterized in that: An air outlet channel (250) is provided on the side wall of the inner cylinder (120), and the air outlet (190) is connected to the outer cavity (150) through the air outlet channel (250).

7. The backflush device according to claim 1, characterized in that: The side wall of the outer cylinder (130) is provided with an air suction channel (260), and the air suction port (200) is connected to the inner cavity (140) through the air suction channel (260).

8. The backflush device according to claim 1, characterized in that: The air outlets (190) are provided with two, the air suction ports (200) are provided with two, and the air outlets (190) and the air suction ports (200) are arranged at intervals.

9. The backflush device according to claim 1, characterized in that: A support plate (270) is provided in the middle of the air outlet (190) and in the middle of the air suction port (200).

10. A vacuum cleaner, characterized in that: It comprises the back-flushing device as described in any one of claims 1 to 9.

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