Sweeping robot

Provided is a sweeping robot. The sweeping robot includes a chassis and a jet dust raising structure, and the jet dust raising structure is installed on the chassis, the jet dust raising structure has an air inlet, an air outlet and a jet channel connected to the air inlet and the air outlet, the air inlet is configured for air flow into the jet channel, the air outlet is located on a front side of the brush suction port of the sweeping robot.

CROSS-REFERENCES TO RELATED APPLICATIONS

The present disclosure is a national phase application of International Application No. PCT/CN2018/114876 filed Nov. 9, 2018, the entireties of which are herein incorporated by reference.

FIELD

The present disclosure relates to the field of a sweeping robot technology, and in particular, to a sweeping robot.

BACKGROUND

With improvement of living standards, sweeping robots have entered our lives, and requirements of the sweeping robots are higher and higher. For example, the sweeping robots instead of people for daily cleaning, dust removal abilities of the sweeping robots are a key performance. In the prior art, the sweeping robots cannot clean dust in ground gaps effectively. The sweeping robots cannot meet needs of people.

SUMMARY

A main purpose of the present disclosure is to provide a sweeping robot, aiming at improving a cleaning ability of the sweeping robot.

In order to achieve the above purpose, a sweeping robot is provided by the present disclosure. The sweeping robot includes a chassis and a jet dust raising structure installed on the chassis. The jet dust raising structure has a jet channel. The jet channel has an air inlet and an air outlet. The air inlet is configured for air flow to enter the jet channel. The air outlet is arranged in a front side of a brush suction port of the sweeping robot.

In one embodiment, the air outlet is arranged towards the brush suction port.

In one embodiment, the jet channel extends obliquely in a direction from a top of a front side of the chassis to the brush suction port.

In one embodiment, an angle α between the jet channel and a vertical direction ranges from 20° to 70°.

In one embodiment, the jet channel extends along a straight line, and an inner wall of the jet channel includes a flat surface.

In one embodiment, the jet channel includes a drainage section close to the air inlet and a jet section close to the air outlet. The drainage section extends along a straight line, and the jet section extends along the curve line.

In one embodiment, cross-sectional area of the jet channel is gradually reduced from the air inlet to the air outlet.

In one embodiment, a ratio S1/S2 of area S1 of the air outlet to area S2 of the air inlet is greater than or equal to 0.2 and less than 1.

In one embodiment, a length L of the air outlet ranges from 3 mm to 20 mm, or a width D of the air outlet ranges from 0.5 mm to 3 mm.

In one embodiment, a distance K between the air outlet and the brush suction port of the is greater than 0 and less than or equal to 20 mm.

In one embodiment, the chassis defines an air inlet chamber. The air inlet chamber has an air intake for the air flow. A plurality of the air inlets are connected to the air inlet chamber.

In one embodiment, the sweeping robot further includes a dust suction motor. An exhaust port of the dust suction motor is connected with at least one of the air inlet and an air intake of the air inlet chamber of the chassis.

In one embodiment, the exhaust port is connected to at least one of the air inlet and the air intake through a hose. The sweeping robot includes an mounting cylinder with a roller brush. A slot is defined on one side of the mounting cylinder away from the roller brush, and part of the hose is clamped in the slot.

In one embodiment, the exhaust port is connected to at least one of the air inlet and the air intake through a hose. The sweeping robot includes a mounting cylinder with a roller brush. A mounting column is arranged on one side of the mounting cylinder away from the roller brush. A circuit board of the sweeping robot is installed on the mounting column. The hose passes through a limiting gap formed by the circuit board, the mounting column and the mounting cylinder.

In one embodiment, the exhaust port is connected to at least one of the air inlet and the air intake through a pipeline, and a flow regulating valve is arranged on the pipeline.

In one embodiment, the sweeping robot includes a main control circuit and a detection device for dirt. The detection device detects the amount of dirt at a current position and sends a detection result to the main control circuit. The main control circuit obtains preset duration corresponding to the detection result according to the detection result, and controls the sweeping robot to stay at the current position for the preset duration.

In one embodiment, a bottom of the chassis is further provided with a pressurization bulge. The pressurization bulge is arranged in a front side of the brush suction port. The pressurization bulges are spaced along a length direction of the brush suction port. The air outlet is corresponding to a gap between two adjacent pressurization bulges.

In one embodiment, the air outlet is arranged at a front side of the pressurization bulge.

In one embodiment, a height of the pressurization bulge gradually increases from a front side of the chassis to the brush suction port. A maximum distance between the pressurization bulge and a bottom of the chassis ranges from 0.5 mm to 5 mm.

In one embodiment, the jet dust raising structure includes a jet sheet. The jet sheet is provided with the jet channels arranged along a length direction of the brush suction port.

In one embodiment, the jet dust raising structure further includes a baffle. The jet sheet and the baffle are enclosed to form an air inlet chamber. The air inlet is arranged in the air inlet chamber.

In one embodiment, the jet sheet is integrally formed with the chassis.

In the embodiments of the present disclosure, the jet dust raising structure is arranged on the chassis, and the jet channel of the jet dust raising structure runs through the top and the bottom of the chassis. The air flow enters the jet channel from the air inlet, and then is ejected at the air outlet after passing through the jet channel to raise the dust in front of the brush suction port, and raised dust is inhaled by the brush suction port. In response to the air flow being ejected, the air flow cannot only raise dust in flat, but also raise dust in gaps. In this way, dust that cannot be directly absorbed by the brush suction port can be raised, so that the brush suction port can absorb the dust in the narrow space such as the gap and hereafter improving efficiency of the brush suction port and the cleaning ability of the sweeping robot.

The labels in the drawings are described as follows:

Embodiments of the present disclosure will be further explained with reference to attached drawings in combination with the embodiments.

DETAILED DESCRIPTION OF THE DISCLOSURE

The disclosure will now be described in detail with reference to the accompanying drawings and examples. Apparently, the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments.

It should be noted that if the embodiments of the present disclosure involve directional indication (such as up, down, left, right, front, rear, etc.), the directional indications are only used to explain the relative position relationship and motion between the elements in a posture (as shown in the figure). If the specific posture changes, the directional indications will change accordingly.

In addition, if there are descriptions of “first”, “second” and the like in the embodiments of the present disclosure, the descriptions of “first”, “second” and the like are only used herein for purposes of description and are not intended to indicate or imply relative importance or implicitly indicating the number of indicated features. Thus, the features defined as “first” and “second” are intended to indicate or imply including one or more than one these features. At the same time, the meaning of “and/or” in the description includes three schemes. Taking “A and/or B” as an example, “A and/or B” includes scheme A, or scheme B, or scheme A and B.

A sweeping robot is provided by the present disclosure. The sweeping robot includes a jet dust raising structure200. Thus, the sweeping robot can clean dust in narrow space such as a ground gap. It is conducive to improving a cleaning ability of the sweeping robot.

A specific structure of the sweeping robot will be mainly describe as following.

Referring toFIG.1toFIG.10, in some embodiments of the present disclosure, the sweeping robot includes a chassis100and a jet dust raising structure200. The jet dust raising structure200is installed on the chassis100. The jet dust raising structure200has an air inlet220, an air outlet230, and a jet channel210connected to the air inlet220and the air outlet230. The air inlet220is configured for air flow to enter the jet channel210. The air outlet230is arranged in a front side of a brush suction port110of the sweeping robot. The brush suction port110is arranged at a bottom of the chassis100, and a roller brush810is arranged in the brush suction port110.

In the embodiment, forms of the jet dust raising structure200are various, such as a plate-shaped form, a block-shaped form, a strip-shaped form and so on. There is no special limitation here, as long as the jet dust raising structure200has the jet channel210that can jet to achieve an effect of dust raising. There are many ways to install the jet dust raising structure200on the chassis100, such as snap connection, screw fastening connection, adhesive connection and plug connection. In some embodiments, a slot may be defined by the chassis100to clamp the jet dust raising structure200into the slot. In the embodiment, taking the jet dust raising structure200and the chassis100as an integrated structure as an example. Shapes of the chassis100are various, such as polygon, ellipse, circle, etc. In the case of a same volume, the chassis100can be set as a circle to make the sweeping robot enter a narrower space.

Relationships between the jet dust raising structure200and the chassis100are various. For example, an installation port is opened on the chassis100to install a water jet dust raising structure into the installation port, or the jet dust raising structure200can be directly installed on the chassis100and a through hole connected to the jet channel210is formed on the chassis100to let the air flow through. As long as the air outlet230of the jet channel210can deliver the air flow to ground in front of the brush suction port110.

A specific example of the jet dust raising structure200is introduced below. The jet dust raising structure200includes a jet sheet280. The jet sheet280is provided with jet channels210. The jet channels210are arranged along a length direction of the brush suction port110. In the embodiment, the jet dust raising structure200is the jet sheet, and the jet channel210runs through two opposite plates of the jet sheet. The chassis100is provided with a mounting port, and the jet sheet is installed in the mounting port to make the air inlet220of the jet channel210connected with a top of the chassis100, and the air outlet230connected with a bottom of the chassis100. The jet channels210may make effectively raise the dust in front of the brush suction port110. It is conducive to improve the cleaning effect of the sweeping robot. The air inlet220can supply air individually or collectively. In response to supplying air collectively, an air inlet chamber250is needed. Under these circumstances, the jet structure may also include a baffle240, the jet sheet and the baffle240are enclosed to form an air inlet chamber250, and the air inlet220is arranged in the air inlet chamber250. The baffle240is in a strip shape, and a cross section of the baffle240can be in an L-shape or in a notch shape. In response to the baffle being in the L-shape, a plat is needed to arranged on the chassis100to cooperate with the baffle240, and a structure formed by the baffle240and the plate covers on the jet sheet. In response to the baffle being in a notch shape, the baffle240covers on the jet sheet to form the air inlet chamber250. In some embodiments, the baffle240can be integrated with the chassis100or with the jet sheet. In some embodiments, in order to simplify manufacturing and installation process of the jet sheet, the jet sheet is integrated formed with the chassis100.

In the embodiment, the jet dust raising structure200is arranged on the chassis100, and the jet channel210of the jet dust raising structure200runs through the top and the bottom of the chassis100. The air flow enters the jet channel210from the air inlet220, and then is ejected at the air outlet230after passing through the jet channel210to raise the dust in front of the brush suction port110, and raised dust is inhaled by the brush suction port110. In response to the air flow being ejected, the air flow cannot only raise dust in flat, but also raise dust in gaps. In this way, dust that cannot be directly absorbed by the brush suction port110can be raised, so that the brush suction port110can absorb the dust in the narrow space such as the gap and hereafter improving efficiency of the brush suction port110and the cleaning ability of the sweeping robot.

In some embodiments, in order to make the jet channel210achieve a better raising dust effect, the air outlet230is arranged towards the brush suction port110. By arranging the air outlet230toward the brush suction port110, the air flow from the jet channel210blows the dust to the brush suction port110. Thus, it is convenient for the brush suction port110to absorb the dust. The jet channel210extends obliquely in a direction from a top of a front side of the chassis100to the brush suction port110. That is, the jet channel210extends backward, and the jet channel210ejects the air flow backward. By setting the air inlet220on the top of the chassis100, inlet air of the jet channel210does not affect jet of the air port230, and at the same time, a extension direction of the jet channel210can be guaranteed to be from top to bottom, which is conducive to passing through the air flow.

In order to further ensure a jet effect, an angle α between the jet channel210and a vertical direction ranges from 20° to 70°. The angle between jet channel210and the vertical direction is a deflection angle of jet channel210towards the brush suction port110. In response to the angle α being too small, air flow emitted reflects to the front side of the brush suction port110, which is not conducive for the air flow to directly enter the brush suction port110. In response to the angle α being too large, reflection distance is far away, the air flow may fall on a back side of the brush suction port110, which is not conductive for the air flow to directly be absorbed into the brush suction port110.

An inner wall of the jet channel210can be flat surface or curved surface. In some embodiments, the inner wall of the jet channel210may include the flat surface and the curved surface. The following introduction takes the flat as an example first, and then takes the inner wall of the jet channel210may including the flat surface and the curved surface as an example.

The jet channel210extends along a straight line, and the inner wall of the jet channel210includes the flat surface. In the embodiment, the jet channel210is a straight channel, and resistance of the air flow in the jet channel210is small and the air flow can be ejected from the air outlet230easily and quickly. At the same time, a straight jet channel210is easy to manufacture, which is easy to simplify manufacturing process. Under some special conditions, the jet channel210needs to be provided with a large angle change. Under these circumstances, the curved surface is need to guide the air flow to make the air flow smoothly transit in process of deflecting.

In some embodiments, referring toFIG.11together, in order to make the jet channel210have a large steering angle in an effective space, a curved section is arranged close to the air outlet230, and the jet channel210includes a drainage section2101close to the air inlet220and a jet section2102close to the air outlet230. The drainage section2101extends along a straight line and the jet section2102extends along a curve line. In the embodiment, the air flow first passes through a straight drainage section2101. Before the air flow is ejected from the air port230, a jet direction of the air flow needs to be adjusted. The jet section2102can make a jet angle of the air flow achieve a best effect of jet.

In order to further improve a raising dust effect, cross-sectional area of the jet channel210is gradually reduced from the air inlet220to the air outlet230. By reducing the cross-sectional area of the jet channel210, air pressure of air flow in the jet channel210increases gradually, flow rate of air flow at air outlet230can be higher, which is conducive to greatly improving the raising dust effect. In order to further improve adjustment accuracy of pressure and flow rate in the jet channel210, a ratio S1/S2 of area S1 of the air outlet230to area S2 of the air inlet220is greater than or equal to 0.2 and less than 1. In a range, the ratio of the area of the air outlet230to the area of the air inlet220is inversely related to increase of the pressure and the flow rate. However, the ratio of the area of air outlet230to the area of air inlet220cannot be too large. In response to the ratio being equal to 1, an effect of increasing the pressure and the flow rate will not be achieved. In response to the ratio being less than 0.2, area difference between air outlet230and air inlet220is large. Normal flow of air flow will be affected, witch is not conducive to jet of the air flow.

In order to achieve a better jet effect, a length L of the air outlet230ranges from 3 mm to 20 mm, and/or a width D of the air outlet230ranges from 0.5 mm to 3 mm. The length of air outlet230cannot be too long or too short. In response to the length of air outlet230being too long, the air flow flowing out along a length direction of air outlet230is uneven, and turbulence is easy to occur along the length direction, which is not conducive to accurate jet of the air flow. In response to the length of air outlet230being too short, a jet length is not enough, and an effect is not good. Similarly, the width of air outlet230cannot be too large or too small. In response to the width of air outlet230being too large, the air flow flowing out along a width direction of air outlet230is uneven, and turbulence is easy to occur along the width direction, which is not conducive to accurate jet of the air flow. In response to the width of air outlet230being too short, a jet width is not enough and the effect is not good.

In order to further improve the raising dust effect from the jet channel210, a distance K between the air outlet230and the brush suction port110is greater than 0 and less than or equal to 20 mm. The distance between the air outlet230and the brush suction port110is very important. After the air flow is emitted into the ground (gap), the air flow is reflected to the brush suction port110. In response to the distance between the air outlet230and the brush suction port110being too long, it is difficult for the air flow to be emitted to the brush suction port110accurately and quickly, and the raising dust effect is not good.

In some embodiments, the chassis100defines an air inlet chamber250to improve air inlet efficiency. The air inlet chamber250may have an air intake260for the air flow in, and the air inlet220is connected with the air inlet chamber250. In response to the number of air inlets220is multiple, air inlets220are all connected with the air inlet chamber250, so that air inlets220can supply air simultaneously. In addition, a position of the air inlet220is more flexible by setting the air inlet chamber250. It is convenient for the air inlet220to be connected to the brush suction port110. The air inlet chamber250extends along the length direction of the brush suction port110so that the air inlet220and the air outlet230can be connected to the brush suction port110, and at the same time, the length of the jet channel210can be reduced and hereafter reducing distance of air flow movement.

In order to simplify a whole machine structure and make use of an existing structure to supply air as reasonably as possible, the sweeping robot also includes a dust suction motor900, and an exhaust port910of the dust suction motor900is connected with at least one of the air inlet220and the air intake260of the air inlet chamber250of the chassis100. The dust suction motor900is connected with a dust cup700and the brush suction port110to form negative pressure at the brush suction port110, thus absorbing dust. In the embodiment, the air flow in the dust cup700is also transmitted to the jet channel210, forming a circulation of the air flow. A circulation path is as follows: the brush suction port110absorbs air flow under the negative pressure, the air flow flows from the brush suction port110to the dust cup700, and then enters the jet channel210through the dust suction motor900, and the air flow from the jet channel210is absorbed by the brush suction port110. In this way, reuse of the dust suction motor900makes utilization of the dust suction motor900greatly improved.

Ways of the exhaust port910of the dust suction motor900is connected with at least one of the air inlet220and the air intake260of the air inlet chamber250of the chassis100are various, such as connection through pipe, direct connection between them, or connection through a hose270. In one embodiment, the exhaust port910is connected with at least one of the air inlet220and the air intake260through the hose270. The sweeping robot includes a mounting cylinder800with a roller brush810. A slot820is defined on one side of the mounting cylinder800away from the roller brush810, and part of the hose270is clamped in the slot820. In the embodiment, the exhaust port910of dust suction motor900and the air inlet220of the jet channel210are connected through the hose270. Because rigidity of the hose270is low, the hose270may shake during working. The hose270is fixed in the slot820to avoid shaking of the hose270and improve stability of the hose270.

In some embodiments, referring toFIG.12together, the exhaust port910is connected with at least one of the air inlet220and the air intake260through the hose270. The sweeping robot includes the mounting cylinder800with the roller brush810, and a mounting column760is arranged on one side of the mounting cylinder800away from the roller brush810, and a circuit board300of the sweeping robot is installed on the mounting column760. The hose270passes through a limiting gap formed by the circuit board300, the mounting column760and the mounting cylinder800. The number of mounting columns760is two. Two mounting columns760support both ends of the circuit board300respectively. Top of the two mounting columns760and the mounting cylinder800and the circuit board300are enclosed to form the limiting gap. The hose270is not easy to shake after passing through the limiting gap, thus improving the stability of the hose270.

In some embodiments, in order to control jet intensity and jet duration in a same position according to dirt level of current ground, two feasible schemes are given below.

The first one is that the exhaust port910is connected with at least one of the air inlet220and the air intake260through a pipeline, and a flow regulating valve is arranged on the pipeline. The flow regulating valve is arranged on the hose270. The flow regulating valve is configured to control flow through the hose270in unit time. In response to there being more dirt on the ground, an opening of the flow regulating valve is enlarged to increase the flow. In response to there being less dirt on the ground, the opening of the flow regulating valve is narrowed to reduce the flow. The flow regulating valve can be a manual valve or an automatic valve. For the automatic valve, the flow regulating valve is connected with the circuit board300of the sweeping robot, and the flow of the flow regulating valve is adjusted according to an instruction issued by the circuit board300.

The second one is that the sweeping robot is provided with a main control circuit400and a detection device500for dirt, as shown inFIG.13. The detection device500detects the amount of dirt at the current position and sends a detection result to the main control circuit400. The main control circuit400may obtain preset duration corresponding to the detection result according to the detection result, and controls the sweeping robot to stay at the current position for the preset duration. In this embodiment, there are many kinds of detection devices500, such as infrared sensor, image acquisition device, contact detection sensor, etc. A detection sensor sends a detected signal to the main control circuit400. The main control circuit400compares a received signal with a preset signal intensity-duration table, and finds out jet duration corresponding to the received signal from the table. In response to there being more dirt on the ground, the main control circuit400selects corresponding longer jet duration. In response to there being less dirt on the ground, the main control circuit400selects corresponding shorter jet duration. In this way, the cleaning efficiency and effect of the sweeping robot can be considered at the same time.

In some embodiments, in order to increase suction efficiency of the brush suction port110, a bottom of the chassis100is also provided with a pressurization bulge120. The pressurization bulge120is arranged in a front side of the brush suction port110. Pressurization bulges120are spaced along the length direction of the brush suction port110, and the air outlet230corresponds to a gap between two adjacent pressurization bulges120.

In the embodiment, the pressurization bulge120is arranged in the front side of the brush suction port110, and there is an air gap between adjacent pressurization bulges120, and the air flow flows through the air gap. By setting the pressurization bulge120, air passing area is reduced, to improve the air pressure entering the brush suction port110and be conducive to the suction of dirt by the brush suction port110. On this basis, the air outlet230of the jet channel210is arranged corresponding to the gap, so that the air flow in the jet channel can quickly and reliably pass through s gaps and enter the brush suction port110. In order to make full use of the gap, a length of the air outlet230is larger than a width of the corresponding gap. In order to improve the dust suction effect, the air outlet230is arranged at the front side of the pressurization bulge120. By setting the air outlet230at the front side of the brush suction port110, the jet air flows through the bottom of the chassis100before pressurization of the pressurization bulge120, to avoid mutual loss of vertical high-speed air pressure and horizontal high-speed air pressure. A joint position of the pressurization bulge120and the air outlet230is located in a low-pressure section, which is conducive to improve the utilization rate of the air flow.

In order to ensure a pressurization effect, a height of the pressurization bulge120gradually increases along the direction from the front side of the chassis100to the brush suction port110, and a maximum distance between the pressurization bulge120and the bottom of the chassis100ranges from 0.5 to 5 mm. A distance between the pressurization bulge120and the chassis100is a height difference between the top of the pressurization bulge120and the air outlet230. In response to the height difference being too small, a distance between the roller brush810and the ground is small, resistance between the roller brush810and the ground is large, which is not conducive to work. In response to the height difference being too large, the distance between the brush suction port110and the ground is too large. Under these circumstances, the roller brush810has no pressure and cannot absorb dust, and the dust suction effect is poor.