CN112690696A - Suction nozzle assembly and cleaning robot - Google Patents
Suction nozzle assembly and cleaning robot Download PDFInfo
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- CN112690696A CN112690696A CN202011637526.2A CN202011637526A CN112690696A CN 112690696 A CN112690696 A CN 112690696A CN 202011637526 A CN202011637526 A CN 202011637526A CN 112690696 A CN112690696 A CN 112690696A
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- nozzle body
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Abstract
The invention discloses a suction nozzle assembly which comprises a suction nozzle body, wherein a shell is arranged on the suction nozzle body, an inclined side wall is arranged on the shell, a dust absorption cavity is formed on the suction nozzle body and the shell, an air inlet is formed in the bottom surface of the suction nozzle body, an air outlet is formed in the shell, and airflow enters the dust absorption cavity from the air inlet, flows through the dust absorption cavity and is discharged from the air outlet, so that the airflow flowing through the dust absorption cavity is uniformly distributed. Also disclosed is a cleaning robot including the nozzle assembly as described above. The suction nozzle assembly provided by the invention has the advantages that the height of the air outlet from the ground is reduced, the average air speed in the dust suction chamber is improved, the generation of vortex airflow is facilitated, and the entrainment effect is enhanced, so that the suction force and the negative pressure level to the ground are improved, the suction force below the air outlet is enhanced, and the dust particle conveying capacity is enhanced; the transition area from the two sides to the suction nozzle body is enlarged, so that the suction level is more balanced, and the dust particle leakage caused by weak suction is reduced.
Description
Technical Field
The invention belongs to the field of cleaning robots, and particularly relates to a suction nozzle assembly and a cleaning robot.
Background
The cleaning robot is a household appliance which utilizes a fan to generate high negative pressure to absorb dust particles on the ground, wherein a suction nozzle is an inlet of a pneumatic system of an air duct of the whole cleaning robot and is also a part for gathering and absorbing the dust particles. In order to improve the cleaning efficiency of the whole machine, the rotating speed of a fan is generally improved in the industry, or the air quantity and the air pressure of a pneumatic system are increased by selecting a fan with a larger model, but the working energy consumption and the noise are increased.
When the wind speed close to the ground in the cavity of the suction nozzle is higher than the suspension speed of the dust particles, the dust particles can be lifted, and the flow speed below the suction pipe is gradually reduced from top to bottom. The design of the traditional suction nozzle dust collection cavity increases the space below the suction pipe and the ground height of the suction pipe, so that the average wind speed in the cavity is lower, particularly the wind speed close to the ground is lower, and the suction force of the suction pipe to the ground is weaker; therefore, dust particles are continuously gathered under the suction pipe and cannot be lifted up in time, and leakage is easy to occur. Traditional suction nozzle outlet area is big, and suction inlet speed decay is fast, leads to suction inlet suction little, and the swirl air current mainly concentrates on in the suction nozzle middle part cavity, and both sides suction is little, and whole suction distributes unevenly, leads to the weak dirt particle side leakage that causes of suction easily.
Disclosure of Invention
The invention provides a suction nozzle assembly and a cleaning robot, and aims to solve the problems that suction force of a suction nozzle of the cleaning robot is not uniform, and cleaning efficiency is low due to the fact that dust particles are prone to side leakage, and negative pressure distribution and airflow movement in the suction nozzle in the prior art are not beneficial to suction and collection and conveying of ground dust particles, and dust particle leakage is prone to occurring in the middle of the suction nozzle.
In order to achieve the above object, the specific technical solution of the suction nozzle assembly and the cleaning robot of the present invention is as follows:
the utility model provides a suction nozzle assembly, includes the suction nozzle body, is provided with the casing on the suction nozzle body, is provided with the slope lateral wall on the casing, and suction nozzle body and casing are formed with the dust absorption cavity, and the bottom surface of suction nozzle body is provided with the air intake, have seted up the air outlet on the casing, and the air current gets into the dust absorption cavity of flowing through from the air intake and discharges from the air outlet and make the air current of flowing through the dust absorption cavity distribute evenly.
Further, a rolling brush cavity is formed in the suction nozzle body, a rolling brush body is arranged in the rolling brush cavity, an airflow channel is formed in the rolling brush cavity, and airflow flows through the airflow channel from the air inlet to the air outlet.
Furthermore, the bottom surface of the shell is provided with an opening, the opening is communicated with the suction nozzle body to form a dust absorption cavity, and the air outlet is arranged on the top surface of the shell.
Furthermore, the vertical distance between the center of the air outlet and the bottom surface of the suction nozzle body is defined as H, the length of the bottom surface of the suction nozzle body is set as L, and H/L is more than or equal to 0.1 and less than or equal to 0.2.
Further, the length of the air outlet is set to be A, the width of the air outlet is set to be B, and the following relation is satisfied: A/L is more than or equal to 0.3 and less than or equal to 0.45, and B/L is more than or equal to 0.08 and less than or equal to 0.12.
Further, the one end and the air outlet of slope lateral wall are connected, the other end and the casing bottom surface fixed connection of slope lateral wall, and the bottom of slope lateral wall and the tip of casing bottom surface are provided with the interval.
Furthermore, an included angle is formed between the inclined side wall and the horizontal plane where the bottom surface of the bottom shell is located, the included angle is set to be alpha, and alpha is more than or equal to 5 degrees and less than or equal to 20 degrees.
Furthermore, two ends of the air outlet in the length direction are respectively provided with an inclined side wall, the distance formed by the inclined side wall and one end of the bottom surface of the shell is set to be L1, the distance formed by the inclined side wall and the other end of the bottom surface of the shell is set to be L2, L1/L is more than or equal to 0.02 and less than or equal to 0.04, and L2/L is more than or equal to 0.02 and less than or equal to 0..
Further, the air outlet is connected with an air duct, a dust box is arranged in the air duct, and a fan is arranged at one end of the dust box.
A cleaning robot comprising a nozzle assembly as described above.
The suction nozzle assembly of the present invention has the following advantages: the suction nozzle assembly provided by the invention has the advantages that the height of the air outlet from the ground is reduced, the average air speed in the dust suction chamber is improved, the generation of vortex airflow is facilitated, and the entrainment effect is enhanced, so that the suction force and the negative pressure level to the ground are improved, the suction force below the air outlet is enhanced, and the dust particle conveying capacity is enhanced; the transition area from the two sides to the suction nozzle body is enlarged, so that the suction level is more balanced, and the dust particle leakage caused by weak suction is reduced.
Drawings
FIG. 1 is a cross-sectional view of a prior art nozzle assembly;
FIG. 2 is a cross-sectional view of a nozzle assembly of the present invention;
FIG. 3 is a partial cross-sectional view of the nozzle assembly of the present invention;
FIG. 4 is a schematic view of a portion of the nozzle assembly of the present invention;
FIG. 5 is a side view of a portion of the construction of the nozzle assembly of the present invention;
FIG. 6 is a schematic view of a prior art nozzle assembly having an internal static pressure of less than-250 Pa;
FIG. 7 is a schematic view of the suction distribution of a prior art nozzle assembly at 0.5mm from the wall;
FIG. 8 is a schematic view of the nozzle assembly of the present invention having an internal static pressure of less than-250 Pa;
FIG. 9 is a schematic view of the suction distribution of the nozzle assembly of the present invention at 0.5mm from the wall surface.
The notation in the figure is:
1. a suction nozzle body; 11. an air outlet; 12. a dust collection chamber; 13. an air inlet; 14. a roller brush chamber; 15. a housing; 2. a roller brush body; 3. a dust box; 4. an air duct; 5. a fan; 6. an airflow channel.
Detailed Description
For better understanding of the objects, structure and function of the present invention, a nozzle assembly and a cleaning robot according to the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the prior art nozzle assembly includes a nozzle body 1, and generally, the air outlet 11 of the nozzle body 1 is increased to the height of the ground and the dust suction chamber 12 is increased so that the average air speed in the cavity is low, especially the air speed near the ground is low, the suction force to the ground is weak, dust particles are collected below the nozzle and cannot be lifted up before being leaked easily.
As shown in fig. 2, the present invention provides a suction nozzle assembly, which includes a suction nozzle body 1, wherein a housing 15 is disposed on the suction nozzle body 1, an inclined side wall is disposed on the housing 15, a dust suction chamber 12 is formed on the suction nozzle body 1 and the housing 15, an air inlet 13 is disposed on a bottom surface of the suction nozzle body 1, an air outlet 11 is disposed on the housing 15, and an air flow enters from the air inlet 13, flows through the dust suction chamber 12, and is discharged from the air outlet 11, so that the air flow flowing through the dust suction chamber 12 is uniformly.
As shown in fig. 3, a rolling brush cavity 14 is formed in the suction nozzle body 1, a rolling brush body 2 is arranged in the rolling brush cavity 14, an airflow channel 6 is formed in the rolling brush cavity 14, and airflow flows through the airflow channel 6 from the air inlet 13 to the air outlet 11.
The bottom surface of the shell 15 is provided with an opening which is communicated with the suction nozzle body 1 to form a dust suction chamber 12, and the air outlet 11 is arranged on the top surface of the shell 15, so that the rolling brush rolls to suck air, and the air inlet 13 flows to the air outlet 11.
The rolling brush body 2 is connected with a driving motor, and the driving motor is arranged in the suction nozzle body 1, so that the driving motor drives the rolling brush body 2 to rotate to realize the flowing of air flow.
In order to improve the average wind speed in the dust collection chamber 12, the vertical distance from the center of the air outlet 11 to the bottom surface of the suction nozzle body 1 is defined as H, the length of the bottom surface of the suction nozzle body 1 is set as L, the ratio of H/L is set to be not less than 0.1 and not more than 0.2, the height of a suction port is properly reduced, the average wind speed in the dust collection chamber 12 can be improved, the generation of vortex airflow is facilitated, the entrainment effect is enhanced, the suction force and the negative pressure level to the ground are improved, particularly, the suction force of the dust collection chamber 12 is enhanced, and the overall performance is the enhancement of the dust particle conveying capacity.
As shown in fig. 4, in order to increase the suction force of the outlet 11 of the housing 15 and avoid the flow loss due to the excessively small suction port surface and the insufficient suction force due to the excessively large suction port area, the length of the outlet 11 is set to a, the width of the outlet 11 is set to B, and the relationship: A/L is more than or equal to 0.3 and less than or equal to 0.45, and B/L is more than or equal to 0.08 and less than or equal to 0.12.
The one end and the air outlet 11 of slope lateral wall are connected, and the other end and the 15 bottom surfaces fixed connection of casing of slope lateral wall, the bottom of slope lateral wall and the tip of the 15 bottom surfaces of casing are provided with the interval.
As shown in FIG. 5, an included angle is formed between the inclined side wall and the horizontal plane where the bottom surface of the bottom shell is located, and the included angle is set to be alpha which is more than or equal to 5 degrees and less than or equal to 20 degrees.
The two ends of the air outlet 11 in the length direction are respectively provided with an inclined side wall, the distance between the inclined side wall and one end of the bottom surface of the shell 15 is set as L1, the distance between the inclined side wall and the other end of the bottom surface of the shell 15 is set as L2, the distance between the inclined side wall and the other end of the bottom surface of the shell 15 is set as L1/L not more than 0.04, the distance between the inclined side wall and the other end of the bottom surface of the shell 15 is set as L2/L not more than 0.040, and preferably L1 is L2, so that the transition.
As shown in Figs. 6 and 7, showing a simulation diagram of the suction distribution of the suction nozzle assembly in the prior art, as shown in Figs. 8 and 9, showing a simulation diagram of the suction distribution of the suction nozzle assembly in the present application, it can be seen from the simulation results that the region of negative pressure of-250 Pa in the cavity of the conventional suction nozzle assembly is mainly concentrated in the suction pipe near the suction port of the suction chamber 12 and at the upper end, and the negative pressure is not high at the lower end and other parts of the suction chamber 12, resulting in poor suction ability of the suction nozzle assembly to the ground and dust particles around the suction nozzle. The suction nozzle assembly has the advantages that the area of negative pressure < -250pa inside the suction nozzle assembly is remarkably enlarged, the suction force at the position close to the wall surface by 0.5mm is improved to 160pa and extends to the ground and the two sides of the suction port, the pressure difference between the outside of the suction nozzle assembly and the suction port is improved, the ground and the peripheral dust particles can be adsorbed with greater strength, the suction level is more balanced, and the leakage of the dust particles caused by the weak suction force is reduced.
Based on the theoretical analysis above, the experiment has still been made to this application, through following experimental data analysis contrast, fully explains the suction nozzle subassembly of this application can strengthen dust particle conveying capacity and make suction distribute evenly to improve dust collection efficiency. Table 1 shows the effect of height H on dust removal efficiency as shown in the following table:
TABLE 1
| Scheme(s) | H/L | A/L | B/L | L1/L | L2/L | α | Standard ash | Soybean |
| Comparative example | 0.3 | 0.4 | 0.1 | 0.03 | 0.03 | 15 | 88％ | 94.3％ |
| Preferred embodiments | 0.15 | 0.4 | 0.1 | 0.03 | 0.03 | 15 | 95％ | 98.6％ |
As shown in Table 1, when H/L is 0.3, and the preferable scheme is 0.15, the suction rate of the standard ash and the soybeans is greater than that of the comparative example, which fully indicates that the suction port height is properly reduced within the range of H/L being more than or equal to 0.1 and less than or equal to 0.2, the average wind speed in the air cavity can be increased, the generation of vortex airflow is facilitated, the entrainment effect is enhanced, and the suction force and the negative pressure level to the ground are increased.
As shown in table 2, table 2 shows the effect of the outlet length a and width B on the dust removal efficiency.
TABLE 2
| Scheme(s) | H/L | A/L | B/L | L1/L | L2/L | α | Standard ash | Soybean |
| Comparative example | 0.15 | 0.5 | 0.14 | 0.03 | 0.03 | 15 | 87％ | 93％ |
| Preferred embodiments | 0.15 | 0.4 | 0.1 | 0.03 | 0.03 | 15 | 95％ | 98.6％ |
As shown in Table 2, the comparative example selects A/L as 0.5; the B/L is 0.14, the suction force of the air outlet 11 of the suction nozzle is increased, and the flow loss caused by too small suction port surface of the suction nozzle and the insufficient suction force caused by too large suction port area are avoided.
As shown in table 3, table 3 shows the effect of L1 and L2 on dust removal efficiency.
TABLE 3
As shown in table 3, preferably L1 is L2, that is, the transition area from both sides to the suction nozzle is enlarged, the area of the suction nozzle body 1 with negative pressure of-250 pa is enlarged significantly, the suction force of 0.5mm close to the wall surface is increased from 120pa to 160pa and extends to the ground and both sides of the suction opening, so as to greatly increase the pressure difference with the outside of the suction nozzle, and to strongly adsorb dust particles on the ground and the periphery. The suction level is more balanced, and the dust particle leakage caused by weak suction is reduced.
As shown in table 4, table 4 shows the influence of the angle α on the dust removal efficiency.
TABLE 4
| Scheme(s) | H/L | A/L | B/L | L1/L | L2/L | α | Standard ash | Soybean |
| Comparative example 1 | 0.15 | 0.4 | 0.1 | 0.05 | 0.05 | 3 | 93％ | 96.1％ |
| Comparative example 2 | 0.15 | 0.4 | 0.1 | 0.05 | 0.05 | 30 | 92％ | 94.5 |
| Preferred embodiments | 0.15 | 0.4 | 0.1 | 0.03 | 0.03 | 15 | 95％ | 98.6％ |
The adsorption forces of the standard ash and the soybeans were 93% and 96.1%, respectively, when the angle was selected to be 3 ° in comparative example 1, 92% and 94.5%, respectively, when the angle was selected to be 30 ° in comparative example 2, and 95% and 98.6%, respectively, when the angle was selected to be 15 ° in the preferred embodiment. It is evident from the above data that the adsorption rates for standard ash and soybeans are significantly improved when the angle is chosen to be 15 °.
The air outlet 11 is connected with an air duct 4, a dust box 3 is arranged in the air duct 4, and a fan 5 is arranged at one end of the dust box 3, so that the fan 5 rotates to realize circulation of air flow.
The invention also provides a cleaning robot, which comprises the suction nozzle assembly. One side of the dust box is connected with a suction pipe, so that the cleaning efficiency of the cleaning robot is improved.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention.
In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The suction nozzle assembly is characterized by comprising a suction nozzle body (1), wherein a shell (15) is arranged on the suction nozzle body (1), an inclined side wall is arranged on the shell (15), a dust suction chamber (12) is formed on the suction nozzle body (1) and the shell (15), an air inlet (13) is formed in the bottom surface of the suction nozzle body (1), an air outlet (11) is formed in the shell (15), and air flow enters the flowing dust suction chamber (12) from the air inlet (13) and is discharged from the air outlet (11) so that the air flow flowing through the dust suction chamber (12) is uniformly distributed.
2. A nozzle assembly according to claim 1, wherein a roller brush chamber (14) is formed in the nozzle body (1), a roller brush body (2) is arranged in the roller brush chamber (14), and an airflow channel (6) is formed in the roller brush chamber (14), and airflow flows from the air inlet (13) through the airflow channel (6) to the air outlet (11).
3. A nozzle assembly according to claim 1, wherein the bottom surface of the housing (15) has an opening which communicates with the nozzle body (1) to form the suction chamber (12), and the air outlet (11) is provided in the top surface of the housing (15).
4. A nozzle assembly as claimed in claim 1, wherein the vertical distance from the center of the outlet (11) to the bottom surface of the nozzle body (1) is defined as H, the length of the bottom surface of the nozzle body (1) is L, and H/L is 0.1-0.2.
5. A nozzle assembly according to claim 1, wherein the length of the outlet opening (11) is defined as a and the width of the outlet opening (11) is defined as B, satisfying the relationship: A/L is more than or equal to 0.3 and less than or equal to 0.45, and B/L is more than or equal to 0.08 and less than or equal to 0.12.
6. A nozzle assembly according to claim 1, wherein one end of the inclined side wall is connected to the air outlet opening (11), the other end of the inclined side wall is fixedly connected to the bottom surface of the housing (15), and the bottom end of the inclined side wall is spaced from the end of the bottom surface of the housing (15).
7. A nozzle assembly as defined in claim 6, wherein the sloped side walls form an included angle with a horizontal plane in which the bottom surface of the bottom housing lies, the included angle being defined as α, 5 ° α or more and 20 ° or less.
8. A nozzle assembly according to claim 5, wherein the inclined side walls are provided at both ends of the outlet opening (11) in the longitudinal direction, the distance between the inclined side walls and one end of the bottom surface of the housing (15) is set to L1, and the distance between the inclined side walls and the other end of the bottom surface of the housing (15) is set to L2, 0.02. ltoreq. L1/L. ltoreq.0.04, and 0.02. ltoreq. L2/L. ltoreq.0.040.
9. A nozzle assembly according to claim 1, wherein the air outlet (11) is connected to an air duct (4), a dust box (3) is arranged in the air duct (4), and a fan (5) is arranged at one end of the dust box (3).
10. A cleaning robot characterized by comprising a suction nozzle assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011637526.2A CN112690696A (en) | 2020-12-31 | 2020-12-31 | Suction nozzle assembly and cleaning robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011637526.2A CN112690696A (en) | 2020-12-31 | 2020-12-31 | Suction nozzle assembly and cleaning robot |
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| Publication Number | Publication Date |
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| CN112690696A true CN112690696A (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011637526.2A Pending CN112690696A (en) | 2020-12-31 | 2020-12-31 | Suction nozzle assembly and cleaning robot |
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| CN (1) | CN112690696A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113243820A (en) * | 2021-05-19 | 2021-08-13 | 上海高仙自动化科技发展有限公司 | Floor brush assembly and cleaning robot |
| CN113413085A (en) * | 2021-07-27 | 2021-09-21 | 苏州高之仙自动化科技有限公司 | Dust absorption nozzle and cleaning robot |
| CN113679284A (en) * | 2021-09-02 | 2021-11-23 | 苏州高之仙自动化科技有限公司 | Rolling brush mechanism and cleaning robot |
| CN114794989A (en) * | 2022-05-23 | 2022-07-29 | 深圳市无限动力发展有限公司 | Floor sweeping machine |
-
2020
- 2020-12-31 CN CN202011637526.2A patent/CN112690696A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113243820A (en) * | 2021-05-19 | 2021-08-13 | 上海高仙自动化科技发展有限公司 | Floor brush assembly and cleaning robot |
| CN113413085A (en) * | 2021-07-27 | 2021-09-21 | 苏州高之仙自动化科技有限公司 | Dust absorption nozzle and cleaning robot |
| CN113413085B (en) * | 2021-07-27 | 2022-12-02 | 苏州高之仙自动化科技有限公司 | Cleaning robot |
| CN113679284A (en) * | 2021-09-02 | 2021-11-23 | 苏州高之仙自动化科技有限公司 | Rolling brush mechanism and cleaning robot |
| CN114794989A (en) * | 2022-05-23 | 2022-07-29 | 深圳市无限动力发展有限公司 | Floor sweeping machine |
| CN114794989B (en) * | 2022-05-23 | 2024-05-14 | 深圳市无限动力发展有限公司 | Floor sweeping machine |
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