Dust collection system and dust collection method of cleaning robot

Abstract

The present invention discloses a vacuuming system and a vacuuming method for a cleaning robot, wherein a separator comprises an inner cavity, a spiral air duct, a separation port, an air inlet and an air outlet, a spiral air duct is provided at one end of the inner cavity, a separation port is provided at the other end of the inner cavity, the beginning of the spiral air duct is connected to the air inlet, the end of the spiral air duct is connected to the inner cavity, and the air outlet is connected to the inner cavity; the separator also comprises an acceleration guide surface, which can accelerate the flow rate of the spiral wind flow; the vacuum port is connected to the air inlet; the dust collection box is connected to the separation port; and a negative pressure generator is connected to the air outlet. The spiral air duct of the separator can form a spiral wind flow, and the acceleration guide surface can accelerate the flow rate of the spiral wind flow, so that the garbage obtains a greater centrifugal force, thereby realizing a faster and more complete separation of the garbage, and improving the garbage separation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of sweeping robots, and in particular to a dust collection system and a dust collection method of a cleaning robot. Background Art

[0002] The cleaning robot is equipped with a dust suction system, which sucks in garbage through negative pressure wind flow and stores it in a dust box. The garbage needs to be separated from the wind flow and stored in the dust box.

[0003] Some cleaning robots use filter assemblies to separate garbage. After the filter assemblies have been used for a period of time, garbage will adhere to the filter assemblies, increasing the resistance of the airflow and thus affecting the suction of the airflow. Therefore, the filter assemblies need to be replaced regularly, resulting in higher usage costs. Summary of the invention

[0004] The object of the present invention is to provide a vacuuming system and a vacuuming method for a cleaning robot, wherein the spiral air duct of the separator can form a spiral wind flow, and the acceleration guide surface can accelerate the flow rate of the spiral wind flow, so that the garbage obtains a greater centrifugal force, thereby achieving faster and more complete separation of the garbage and improving the garbage separation effect.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A dust collection system for a cleaning robot, comprising:

[0007] The separator comprises an inner cavity, a spiral air duct, a separation port, an air inlet and an air outlet. The spiral air duct is provided at one end of the inner cavity, and the separation port is provided at the other end of the inner cavity. The starting end of the spiral air duct is connected to the air inlet, the end of the spiral air duct is connected to the inner cavity, and the air outlet is connected to the inner cavity.

[0008] The separator also includes an accelerating guide surface, which can accelerate the flow rate of the spiral wind flow;

[0009] A dust suction port connected to the air inlet;

[0010] A dust collection box connected to the separation port; and

[0011] A negative pressure generator is connected to the air outlet.

[0012] In some embodiments, the acceleration guide surface is provided at the other end of the inner cavity relative to the spiral air duct;

[0013] The acceleration guide surface is gradually extended inward in a direction away from the spiral air duct.

[0014] In some embodiments, the acceleration guide surface is arranged to gradually extend inward in an arc structure;

[0015] Or the acceleration guide surface is arranged to gradually extend inwards in an oblique line structure.

[0016] In some embodiments, the spiral angle of the spiral air duct is equal to or greater than 45 degrees, or the spiral angle of the spiral air duct is equal to or greater than 90 degrees; or the spiral angle of the spiral air duct is equal to or greater than 180 degrees; or the spiral angle of the spiral air duct is equal to or greater than 270 degrees; or the spiral angle of the spiral air duct is equal to or greater than 360 degrees.

[0017] In some embodiments, the separation port is disposed on a peripheral wall of the inner cavity at the other end portion relative to the spiral air duct, and the separation port is in a long strip shape and is circumferentially extended along the peripheral wall of the inner cavity.

[0018] In some embodiments, the separator further comprises an air outlet pipe, which is disposed inside the inner cavity and coaxially disposed with the inner cavity;

[0019] The air outlet is arranged at the end of the inner cavity close to the spiral air duct;

[0020] One end of the air outlet pipe is extended toward the separation port and communicated with the inner cavity; the other end of the air outlet pipe is communicated with the air outlet.

[0021] In some embodiments, a through hole is provided at the end of the air outlet pipe close to the separation port, and the through hole is covered with a filter.

[0022] In some embodiments, the separator is disposed inside the dust box.

[0023] In some embodiments, a first end plate and a second end plate are respectively provided at both ends of the separator, the first end plate is provided with a first buckle, and the second end plate is provided with a second buckle;

[0024] The dust box is provided with an openable and closable door panel, the inner side of the door panel is provided with a first card slot and a second card slot, the first card buckle matches with the first card slot, and the second card buckle matches with the second card slot.

[0025] A dust collection method, the method comprising the following steps:

[0026] The negative pressure generator works to form negative pressure airflow, and the garbage is sucked from the suction port and flows to the separator under the action of the negative pressure airflow;

[0027] The spiral air duct of the separator causes the airflow to flow in a spiral direction, forming a spiral airflow, which flows in the inner cavity along direction A toward the separation port;

[0028] The accelerating guide surface causes the spiral radius of the spiral air flow to gradually decrease, causing the flow velocity of the spiral air flow to gradually increase;

[0029] The garbage is separated from the separation port under the action of centrifugal force and enters the dust collection box;

[0030] The wind flow after separating the garbage flows to the outside.

[0031] In some embodiments, the wind flow after the garbage is separated flows to the air outlet pipe, flows to the air outlet along the B direction, and finally flows to the outside; wherein the direction of A is opposite to the direction of B.

[0032] The beneficial effects of the present invention are as follows: the spiral air duct of the separator can form a spiral wind flow, and the acceleration guide surface can speed up the flow rate of the spiral wind flow, so that the garbage obtains a greater centrifugal force, thereby achieving faster and more complete separation of the garbage and improving the garbage separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a structural diagram of the dust collection system of the present invention;

[0034] Figure 2 for Figure 1 sectional diagram of

[0035] Figure 3 One of the structural diagrams of the separator of the present invention;

[0036] Figure 4 is an exploded view of the separator of the present invention;

[0037] Figure 5 is a cross-sectional view of a separator of the present invention;

[0038] Figure 6 A cross-sectional view of another embodiment of the separator of the present invention;

[0039] Figure 7 The second structural diagram of the separator of the present invention;

[0040] Figure 8 It is a structural diagram of the dust collection box of the present invention;

[0041] Fig. 9 This is one of the exploded views of the dust box of the present invention;

[0042] Fig.10 This is the second exploded view of the dust box of the present invention;

[0043] Among them: 100-dust suction system; 1-dust box; 11-upper cover; 12-lower cover; 121-rotating shaft; 13-door panel; 131-axial hole; 132-lock hook; 133-first card slot; 134-second card slot; 2-separator; 2a-air inlet; 2b-air outlet; 20-inner cavity; 21-spiral air duct; 211-spiral sheet; 22-separation port; 23-air outlet pipe; 231-through hole; 24-filter element; 25-acceleration guide surface; 2c-first shell; 2d-second shell; 28-first end plate; 281-first buckle; 29-second end plate; 291-second buckle; 3-negative pressure generator; 4-dust suction port; 5-first pipe; 6-second pipe; 200-chassis. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] refer to Figures 1 to 5 , a vacuum system 100 of a cleaning robot, comprising:

[0046] The separator 2 includes an inner cavity 20, a spiral air duct 21, a separation port 22, an air inlet 2a and an air outlet 2b; the inner cavity 20 is a substantially cylindrical space, one end of the inner cavity 20 is provided with a spiral air duct 21, the other end of the inner cavity 20 is provided with a separation port 22, the starting end of the spiral air duct 21 is connected to the air inlet 2a, the end of the spiral air duct 21 is connected to the inner cavity 20, and the air outlet 2b is connected to the inner cavity 20;

[0047] The separator 2 further includes an accelerating guide surface 25, which can accelerate the flow rate of the spiral wind flow;

[0048] The dust suction port 4 is connected to the air inlet 2a; the dust suction port 4 can be connected to the air inlet 2a through a first pipe 5;

[0049] The dust collecting box 1 is connected to the separation port 22; and

[0050] The negative pressure generator 3 is connected to the air outlet 2b; the negative pressure generator 3 can be a fan or a negative pressure motor to form a negative pressure wind flow, and the negative pressure generator 3 can be connected to the air outlet 2b through a second pipe 6.

[0051] As a result, the garbage flows from the dust suction port 4 into the spiral air duct 21 of the separator 2 under the action of negative pressure wind flow. The spiral air duct 21 guides the wind flow to flow in a spiral direction, prompting the wind flow to flow in a spiral direction in the inner cavity 20 to form a spiral wind flow, and flows toward the separation port 22. When it flows to the acceleration guide surface 25, the acceleration guide surface 25 prompts the flow rate of the spiral wind flow to increase, and the garbage obtains a greater centrifugal force. The garbage is separated from the separation port 22 under the action of centrifugal force, and the separated garbage can be collected in the dust box 1. The wind flow with the garbage separated flows to the air outlet 2b and finally flows to the outside.

[0052] Therefore, the separator 2 can form a spiral wind flow, use centrifugal force to separate garbage from the wind flow, and accelerate the flow rate of the spiral wind flow by accelerating the guide surface 25, so that the garbage can obtain a greater centrifugal force, thereby improving the garbage separation effect.

[0053] The separator 2 can replace the filter assembly, reduce the use cost of the cleaning robot, and has a very good garbage separation effect.

[0054] refer to Figure 5 The acceleration guide surface 25 is disposed at the other end of the inner cavity 20, and the acceleration guide surface 25 may be a part of the peripheral wall of the inner cavity 20;

[0055] The acceleration guide surface 25 is gradually extended inward in the direction away from the spiral air duct 21, which can be understood as: the acceleration guide surface 25 is gradually extended in the direction away from the spiral air duct 21 toward the central axis of the inner cavity 20, so that the end space of the inner cavity 20 away from the spiral air duct 21 is gradually narrowed, so as to cause the spiral radius of the spiral air flow to gradually become smaller, thereby causing the flow rate of the spiral air flow to gradually increase, and then the centrifugal force obtained by the garbage becomes gradually larger, and it can be separated from the separation port 22 more quickly, so that lighter garbage can also obtain sufficient centrifugal force to separate from the separation port 22, thereby improving the garbage separation effect.

[0056] The acceleration guide surface 25 is set in an arc structure that gradually extends inward; the arc structure can be set in a manner of gradually changing curvature or a manner of fixed curvature. The acceleration guide surface 25 with an arc structure can cause the spiral radius of the spiral airflow to gradually become smaller, thereby accelerating the flow rate of the spiral airflow and also helping to reduce the resistance of the spiral airflow during the flow toward the separation port 22.

[0057] refer to Figure 6 The acceleration guide surface 25 is gradually extended inwardly in an oblique line structure. Of course, the acceleration guide surface 25 can also be other structures that can achieve wind flow acceleration.

[0058] refer to Figure 4 The spiral air duct 21 is used to guide the flow of spiral wind flow. The spiral air duct 21 can be set between 0 degrees and 360 degrees, or greater than 360 degrees, for example, to 45 degrees, 90 degrees, 180 degrees, 270 degrees, 360 degrees or so. As long as a spiral wind flow can be formed, any form of angle setting is applicable.

[0059] The spiral air duct 21 includes a spiral blade 211 , which is used to form the spiral air duct 21 to guide the flow of spiral wind. The spiral angle of the spiral blade 211 is substantially equal to the spiral angle of the spiral air duct 21 .

[0060] refer to Figure 4 and Figure 5 , the separation port 22 is provided at the other end of the inner cavity 20, that is, the separation port 22 is provided at the end of the inner cavity 20 away from the spiral air duct 21, and the separation port 22 can be provided on the peripheral wall or end wall of the inner cavity 20 away from the spiral air duct 21. Preferably, the separation port 22 can be provided on the peripheral wall of the inner cavity 20 away from the spiral air duct 21, and the garbage will flow spirally along or along the peripheral wall of the inner cavity 20 under the action of centrifugal force. Therefore, the separation port 22 is provided on the peripheral wall of the inner cavity 20, and the garbage can be separated from the separation port 22 more easily and quickly.

[0061] Furthermore, the separation opening 22 is in the shape of an elongated strip and is circumferentially extended along the peripheral wall of the inner cavity 20. During the spiral motion or circular motion, the garbage can have more time and space to be separated from the wind flow, and the garbage can be separated more fully, thereby improving the garbage separation effect.

[0062] refer to Figure 4 and Figure 5 The separator 2 further includes an air outlet pipe 23, which is disposed inside the inner cavity 20 and is coaxially disposed with the inner cavity 20, so as to reduce the flow obstruction of the spiral air flow and make the structure more compact;

[0063] The air outlet 2b is disposed at the end of the inner cavity 20 close to the spiral air duct 21;

[0064] One end of the air outlet pipe 23 is extended toward the separation port 22 and communicated with the inner cavity 20 ; the other end of the air outlet pipe 23 is communicated with the air outlet 2 b.

[0065] The spiral wind flows along direction A to the separation port 22, the wind flow separated from the garbage flows into the air outlet 23, and flows along direction B to the air outlet 2b, and finally flows to the outside, wherein the directions of direction A and direction B are opposite; since the flow directions of direction A and direction B are opposite, it is quite difficult for the garbage to move toward direction B under the inertia of centrifugal force, which effectively causes the garbage to stay in the inner cavity 20 to perform spiral motion or circular motion, and finally separate from the separation port 22, thereby achieving more complete separation of the garbage and improving the garbage separation effect.

[0066] refer to Figure 4 and Figure 5 A through hole 231 is provided at the end of the air outlet pipe 23 close to the separation port 22 . The through hole 231 can be provided on the peripheral wall or end wall of the end of the air outlet pipe 23 close to the separation port 22 . The through hole 231 is covered by a filter 24 .

[0067] The through hole 231 can be arranged on the peripheral wall of the air outlet pipe 23, and the filter 24 is annular. The filter 24 can be mounted or clamped on the air outlet pipe 23, and the filter 24 can be made of a stainless steel filter. Therefore, the airflow needs to pass through the filter 24 before it can flow into the air outlet pipe 23. Due to the different particle sizes or weights of garbage, the centrifugal force obtained is different. There may be a small amount of garbage with smaller particles or lighter weight distributed in the central area of ​​the airflow. In order to further reduce or prevent the garbage from flowing to the outside, a filter 24 can be set to block the garbage, so that the garbage stays in the inner cavity 20 and continues to perform spiral motion or circular motion.

[0068] In addition, since there is basically no garbage or very little garbage in the central area of ​​the spiral air flow, and the garbage tends to move outward under the action of centrifugal force, the amount of garbage attached to the filter element 24 is small, and the filter element 24 can be used for a long time without frequent replacement.

[0069] refer to Figures 7 to 10 , the separator 2 is arranged inside the dust collecting box 1. Of course, the separator 2 can also be arranged outside the dust collecting box 1 according to the situation.

[0070] refer to Figure 7 , the separator 2 is provided with a first end plate 28 and a second end plate 29 at both ends, the first end plate 28 is provided with a first buckle 281, and the second end plate 29 is provided with a second buckle 291;

[0071] refer to Fig.10 The dust box 1 is provided with an openable door panel 13, the inner side of the door panel 13 is provided with a first card slot 133 and a second card slot 134, the first card buckle 281 matches with the first card slot 133, and the second card buckle 291 matches with the second card slot 134. The separator 2 is assembled on the inner side of the door panel 13 in a snap-fit ​​manner.

[0072] refer to Fig. 9 and Fig.10 The dust box 1 includes an upper cover 11, a lower cover 12 and a door panel 13. One end of the door panel 13 is provided with an axis hole 131, and the other end of the door panel 13 is provided with a lock hook 132. The lower cover 12 is provided with a rotating shaft 121 matched with the axis hole 131, and the upper cover 11 can also be provided with a rotating shaft 121 to achieve a rotatable connection of the door panel 13. The door panel 13 can be rotatably opened and closed, and the separator 2 is assembled on the inner side of the door panel 13, which is convenient for assembly and maintenance.

[0073] refer to Figure 4 The separator 2 can be composed of a first shell 2c, a second shell 2d and an air outlet pipe 23, etc. The first shell 2c and the second shell 2d are both roughly in the shape of a tube, a cup or a cylinder, and the first shell 2c and the second shell 2d form an inner cavity 20; the first shell 2c is provided with an air inlet 2a and an air outlet 2b, wherein the air inlet 2a can be provided on the peripheral wall of the first shell 2c, and the air outlet 2b can be provided on the peripheral wall or the end wall of the first shell 2c; the second shell 2d is provided with a separation port 22 and an acceleration guide surface 25, and the acceleration guide surface 25 constitutes a part of the peripheral wall of the second shell 2d, so that the second shell 2d gradually narrows or shrinks in the direction away from the first shell 2c. A spiral sheet 211 is provided at one end of the air outlet pipe 23, and a through hole 231 is provided at the other end of the air outlet pipe 23.

[0074] The first shell 2c and the second shell 2d can be assembled by a screw-on structure or fasteners, and the first shell 2c and the air outlet pipe 23 can also be assembled by a screw-on structure, a plug-in structure or fasteners; the first shell 2c is provided with a first end plate 28, and the second shell 2d is provided with a second end plate 29.

[0075] A dust collection method, the method comprising the following steps:

[0076] The negative pressure generator 3 works to form a negative pressure wind flow, and the garbage is sucked from the suction port 4 under the action of the negative pressure wind flow and flows to the separator 2;

[0077] The spiral air duct 21 of the separator 2 causes the airflow to flow in a spiral direction, forming a spiral airflow, which flows in the inner cavity 20 along the direction A toward the separation port 22;

[0078] The accelerating guide surface 25 causes the spiral radius of the spiral air flow to gradually decrease, so that the flow velocity of the spiral air flow gradually increases;

[0079] Under the action of centrifugal force, the garbage is separated from the separation port 22 and enters the dust collecting box 1;

[0080] The wind flow after separating the garbage flows to the outside.

[0081] Furthermore, the wind flow after separating the garbage flows to the air outlet pipe 23, flows to the air outlet 2b along the B direction, and finally flows to the outside; wherein the directions of the A direction and the B direction are opposite.

[0082] Thus, the separator 22 can form a spiral wind flow and use centrifugal force to separate garbage from the wind flow; and, by accelerating the guide surface 25 to speed up the flow rate of the spiral wind flow, the garbage obtains a greater centrifugal force and separates more quickly and fully from the separation port 22, further improving the garbage separation effect.

[0083] The above disclosure is only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the invention.

Claims

1. A vacuum system for a cleaning robot, characterized in that: include: A separator (2), the separator (2) comprising an inner cavity (20), a spiral air duct (21), a separation port (22), an air inlet (2a) and an air outlet (2b), one end of the inner cavity (20) being provided with the spiral air duct (21), the other end of the inner cavity (20) being provided with the separation port (22), the starting end of the spiral air duct (21) being connected to the air inlet (2a), the end of the spiral air duct (21) being connected to the inner cavity (20), and the air outlet (2b) being connected to the inner cavity (20); The separator (2) further comprises an accelerating guide surface (25), wherein the accelerating guide surface (25) is capable of accelerating the flow rate of the spiral wind flow; A dust suction port (4) connected to the air inlet (2a); A dust collecting box (1) connected to the separation port (22); and A negative pressure generator (3) is connected to the air outlet (2b).

2. The vacuum system of a cleaning robot according to claim 1, characterized in that: The acceleration guide surface (25) is arranged at the other end of the inner cavity (20) relative to the spiral air duct (21); The acceleration guide surface (25) is arranged to gradually extend inward in a direction away from the spiral air duct (21).

3. The dust collection system of a cleaning robot according to claim 2, characterized in that: The acceleration guide surface (25) is arranged to gradually extend inwards in an arc structure; Or the acceleration guide surface (25) is arranged to gradually extend inwards in an oblique line structure.

4. The dust collection system of a cleaning robot according to claim 1, characterized in that: The spiral angle of the spiral air duct (21) is equal to or greater than 45 degrees.

5. The dust collection system of a cleaning robot according to claim 1, characterized in that: The separator (2) further comprises an air outlet pipe (23), wherein the air outlet pipe (23) is arranged inside the inner cavity (20) and is coaxially arranged with the inner cavity (20); The air outlet (2b) is arranged at an end of the inner cavity (20) close to the spiral air duct (21); One end of the air outlet pipe (23) is extended in the direction of the separation port (22) and is connected to the inner cavity (20); the other end of the air outlet pipe (23) is connected to the air outlet (2b).

6. The dust collection system of a cleaning robot according to claim 5, characterized in that: The end of the air outlet pipe (23) close to the separation port (22) is provided with a through hole (231), and the through hole (231) is covered with a filter element (24).

7. The dust collection system of a cleaning robot according to claim 1, characterized in that: The separator (2) is arranged inside the dust collecting box (1).

8. The dust collection system of a cleaning robot according to claim 7, characterized in that: The separator (2) is provided with a first end plate (28) and a second end plate (29) at both ends, respectively; the first end plate (28) is provided with a first buckle (281), and the second end plate (29) is provided with a second buckle (291); The dust collecting box (1) is provided with an openable and closable door panel (13), the inner side of the door panel (13) is provided with a first card slot (133) and a second card slot (134), the first card buckle (281) cooperates with the first card slot (133), and the second card buckle (291) cooperates with the second card slot (134).

9. A dust collection method, characterized in that: The method comprises the following steps: The negative pressure generator (3) works to form a negative pressure airflow, and the garbage is sucked from the dust suction port (4) under the action of the negative pressure airflow and flows to the separator (2); The spiral air duct (21) of the separator (2) causes the airflow to flow in a spiral direction, thereby forming a spiral airflow, and the spiral airflow flows along direction A in the inner cavity (20) toward the separation port (22); The accelerating guide surface (25) causes the spiral radius of the spiral air flow to gradually decrease, so that the flow speed of the spiral air flow gradually increases; The garbage is separated from the separation port (22) under the action of centrifugal force and enters the dust collecting box (1); The wind flow after separating the garbage flows to the outside.

10. A dust collection method according to claim 9, characterized in that: The airflow after separating the garbage flows to the air outlet pipe (23), flows along the direction B to the air outlet (2b), and finally flows to the outside; Among them, the directions of A and B are opposite.

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