CN109157156B

CN109157156B - Cleaning head for a surface cleaning device

Info

Publication number: CN109157156B
Application number: CN201811292960.4A
Authority: CN
Inventors: 卞庄
Original assignee: Suzhou Chenghe Cleaning Equipment Co Ltd
Current assignee: Suzhou Chenghe Cleaning Equipment Co Ltd
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2020-07-03
Anticipated expiration: 2038-11-01
Also published as: CN109157156A

Abstract

The invention discloses a cleaning head for a surface cleaning device, which belongs to the technical field of cleaning equipment and solves the technical problem that dirty liquid in a fluid channel is easy to flow back to cause secondary pollution on a surface to be cleaned in the prior art, the cleaning head comprises a cleaning head body capable of moving on the ground, the cleaning head body comprises at least one suction port capable of sucking up the dirty liquid on the ground by means of vacuum suction force, an output port positioned above the suction port, a fluid channel for fluidly communicating the suction port with the output port and a dirty liquid backflow collecting device, and a flexible liquid storage bag is arranged as the dirty liquid backflow collecting device in the scheme and is always in fluid communication with the fluid channel, so that the dirty liquid backflow from the output port can be always reserved in the fluid channel and collected by the flexible liquid storage bag; and the flexible liquid storage bag can be deformed under the action of vacuum suction force, so that dirty liquid stored in the flexible liquid storage bag can be pumped away by the fluid channel under the action of the vacuum suction force again, and the backflow prevention effect is better.

Description

Cleaning head for a surface cleaning device

Technical Field

The invention relates to the technical field of cleaning equipment, in particular to a cleaning head for a surface cleaning device.

Background

In the prior art, a surface cleaning apparatus such as a floor washing machine, a vacuum cleaner, etc. generally includes a rod and a cleaning head capable of moving on a floor, a suction port for sucking up dirty liquid on the floor to be cleaned is usually disposed at the bottom of the cleaning head, an output port is usually disposed at the top of the cleaning head, a fluid channel communicating the suction port and the output port is usually disposed inside the cleaning head, the output port is usually communicated with a dirty liquid tank, the dirty liquid tank is usually disposed on the cleaning head or the rod, a vacuum generating component is usually disposed on the cleaning head or the rod, the vacuum generating component can generate vacuum suction force/negative pressure suction force in the fluid channel, so that the dirty liquid is conveyed from the suction port to the output port, and when the negative pressure suction force in the fluid channel is lost, dirty liquid which has not entered into the dirty liquid tank will enter the fluid channel from the output port again and flow back toward the direction of the suction, thus, when the dirt liquid flows back to the floor to be cleaned, secondary pollution is caused to the floor to be cleaned.

The Chinese patent with publication number CN206151377U discloses a floor brush and a cleaning machine thereof in the specification, and provides the following technical scheme aiming at the technical problem that when the floor brush is cleaned on a surface to be cleaned, sewage is easy to flow back to the surface to be cleaned from an airflow channel, so that the surface to be cleaned is secondarily polluted; it utilizes and sets up anti-return assembly 26 in airflow channel 20, anti-return assembly 26 includes sealing connection 27 and fender piece 28, keep off the piece 28 and set up the one side along the dirty water inflow direction at sealing connection 27, it flows back to the face of waiting to clean to block sewage, avoid waiting to clean the face and receive secondary pollution, but anti-return assembly 26 is located airflow channel 20 all the time, occupy the space in airflow channel 20, make foul solution must cross fender piece 28 and just can get into first pipeline 24 in, so, will have some foul solution to be blockked by fender piece 28 outside first pipeline 24, the efficiency that the scrubbing brush inhales foul solution has been reduced.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a cleaning head for a surface cleaning apparatus having a better backflow preventing effect. In order to achieve the purpose of the invention, the invention adopts the following technical scheme:

a cleaner head for a surface cleaning apparatus, comprising a cleaner head body movable over a floor surface, the cleaner head body comprising at least one suction opening for suctioning soiled fluid from the floor surface by means of a vacuum force, an outlet opening located above the suction opening, a fluid path fluidly connecting the suction opening to the outlet opening, and a soiled fluid return collection device comprising at least one flexible reservoir which is deformable under the vacuum force, the flexible reservoir being located between the outlet opening and the suction opening, the flexible reservoir being in fluid communication with the fluid path at all times.

In the above technical solution, preferably, the fluid channel is provided with at least one backflow port with a downward opening, the backflow port is located at a lower side of the output port, the flexible liquid storage bag is arranged at the backflow port, and the interior of the fluid channel is in fluid communication with the flexible liquid storage bag through the backflow port.

In the above technical solution, preferably, when the inside of the fluid channel is in an atmospheric pressure state, at least a portion of the flexible liquid storage bag protrudes toward the outside of the fluid channel.

In the above technical solution, preferably, when the inside of the fluid channel is in a vacuum suction state, at least a portion of the flexible liquid storage bag is sucked into the inside of the fluid channel.

In the above technical solution, preferably, the fluid channel includes an upstream sub-channel located upstream of the backflow port and a downstream sub-channel located downstream of the backflow port, the upstream sub-channel includes a terminal opening close to the backflow port, and the terminal opening is aligned with the backflow port up and down.

In the above technical solution, preferably, the aperture of the end opening is not greater than the aperture of the return port.

In the above technical solution, preferably, the upstream branch channel includes a section of vertical pipe section, and the end opening is located at the lowest end of the vertical pipe section.

In the above technical solution, preferably, the downstream branch passage includes an initial end opening near the return port, the downstream branch passage includes a section of horizontal pipe, and the initial end opening is located on the horizontal pipe.

In the above technical solution, preferably, the fluid channel is T-shaped, and the return port is located at a junction of the T-shaped fluid channel.

In the above technical solution, preferably, the fluid passage is L-shaped, and the return port is located at a corner of the L-shaped fluid passage.

In the above technical solution, preferably, the suction port is not lower than the return port.

In the above technical solution, preferably, the cleaning head body includes a pair of the suction ports, the horizontal pipe section includes a pair of horizontal pipe sections respectively communicated with the suction ports, the pair of horizontal pipe sections are connected, and the return port is disposed at a joint of the pair of horizontal pipe sections.

In the above technical solution, preferably, the flexible liquid storage bag is provided with a weight.

In the above technical solution, preferably, the flexible liquid storage bag is made of rubber or PVC material.

Compared with the prior art, the invention has the following beneficial effects: according to the scheme, the flexible liquid storage bag is used as a sewage backflow collecting device, and the flexible liquid storage bag is always in fluid communication with the fluid channel, so that sewage backflow from the output port can be always reserved in the fluid channel and collected by the flexible liquid storage bag; and the flexible liquid storage bag can be deformed under the action of vacuum suction force, so that dirty liquid stored in the flexible liquid storage bag can be pumped away by the fluid channel under the action of the vacuum suction force again, and the backflow prevention effect is better.

Drawings

FIG. 1 is a schematic main sectional view of a cleaning head according to a first embodiment of the present invention (when a vacuum suction force is applied to a fluid passage);

FIG. 2 is a schematic main sectional view of a cleaning head according to a first embodiment of the present invention (when vacuum suction is lost in the fluid path);

FIG. 3 is a schematic main sectional view of a cleaning head according to a first embodiment of the present invention (when vacuum suction is applied again to the fluid passage);

FIG. 4 is a perspective view of a fluid passageway according to a second embodiment of the present invention;

FIG. 5 is a schematic main sectional view of a fluid passageway according to a second embodiment of the present invention;

FIG. 6 is a schematic main sectional view of a fluid passageway according to a second embodiment of the present invention (when a vacuum suction force is applied to the fluid passageway);

FIG. 7 is a schematic main sectional view of a second embodiment of the fluid passageway of the present invention (in the event of a loss of vacuum suction within the fluid passageway);

FIG. 8 is a principal cross-sectional view of a second embodiment of the fluid passageway of the present invention (when vacuum suction is again applied to the fluid passageway);

wherein: 100. a cleaning head; 11. a suction port; 12. an output port; 13. a fluid channel; 131. a return port; 132. an upstream subchannel; 133. A downstream subchannel; 134. a vertical pipe section; 135. a horizontal pipe section; 1351. horizontally dividing the pipe sections; 136. a terminal opening; 137. the starting end is opened; 14. a dirty liquid reflux collection device; 141. a flexible liquid storage bag; 21. a suction port; 22. an output port; 23. a fluid channel; 231. a return port; 232. an upstream subchannel; 233. a downstream subchannel; 234. a vertical pipe section; 235. a horizontal pipe section; 236. A terminal opening; 237. the starting end is opened; 24. a dirty liquid reflux collection device; 241. a flexible liquid storage bag.

Detailed Description

For the purpose of illustrating the technical content, the constructional features, the achieved objects and the effects of the invention in detail, reference will be made to the following detailed description of the embodiments in conjunction with the accompanying drawings. Surface cleaning apparatuses of the present invention include, but are not limited to, floor washers, cleaners, etc.

The first embodiment: the up-down positional relationship described in this embodiment corresponds to the up-down positional relationship of the cleaning head shown in fig. 1; the "front" corresponds to the left direction of the cleaning head shown in fig. 1, and the "rear" corresponds to the right direction of the cleaning head shown in fig. 1; the vertical direction corresponds to the up-down direction of the cleaning head shown in figure 1, and the horizontal direction corresponds to the horizontal direction of the cleaning head shown in figure 1.

Referring to fig. 1, the cleaner head 100 includes a cleaner head body, suction ports 11 are respectively formed at a front side and a rear side of a bottom of the cleaner head body, an output port 12 is formed at a top of the cleaner head body, and a fluid passage 13 and a dirty liquid backflow collecting device 14 are formed inside the cleaner head body.

The cleaning head body can move on the ground to be cleaned, the suction port 11 is used for sucking dirty liquid on the ground to be cleaned, and the output port 12 is used for outputting the dirty liquid in the fluid channel 13; the fluid channel 13 may be evacuated by a vacuum generating component, such as a vacuum suction unit, or other components capable of generating a negative pressure suction force in the fluid channel 13, such as a vacuum pump, so as to generate a negative pressure suction force in the fluid channel 13.

The fluid channel 13 is opened with a downward-facing return port 131, and the return port 131 is located below the output port 12. The fluid channel 13 includes an upstream sub-channel 132 located upstream of the return port 131 and a downstream sub-channel 133 located downstream of the return port 131, and the upstream sub-channel 132 includes a terminal opening 136 near the return port 131, and the terminal opening 136 is aligned with the return port 131. Specifically, the upstream subchannel 132 comprises a section of upright tube section 134, with an end opening 136 located at the lowermost end of the upright tube section 134. The downstream sub-channel 133 includes a start end opening 137 near the return port 131, and the downstream sub-channel 133 includes a section of horizontal pipe 135 with the start end opening 137 located on the horizontal pipe 135.

The horizontal pipe section 135 includes a pair of horizontal branch sections 1351 respectively communicating with each of the suction ports 11, and the pair of horizontal branch sections 1351 are connected to each other, in this case, the fluid passage 13 has a T-shape, and the return port 131 is located at a junction of the T-shaped fluid passage 13, i.e., at a junction of the pair of horizontal branch sections 1351.

In other embodiments, in order to ensure that the liquid flowing back from the output port 12 flows into the return port 131 as much as possible without splashing from the return port 131 to the downstream sub-channel 133, the aperture of the end opening 136 of the upstream sub-channel 132 is not greater than the aperture of the return port 131; in order to ensure that the dirty liquid will not splash into the downstream branch channel 133 through the return port 131 again and possibly flow to the suction port 11 to avoid secondary pollution to the floor to be cleaned, the suction port 11 is not lower than the return port 131.

The dirty liquid backflow collecting device 14 includes a flexible liquid storage bag 141 connected to the backflow port 131, the interior of the flexible liquid storage bag 141 is in fluid communication with the interior of the fluid channel 13, the flexible liquid storage bag 141 is easily deformed by a vacuum suction force and can be sucked into the fluid channel 13, and a hermetic sealing member is disposed between the flexible liquid storage bag 141 and the backflow port 131. In this embodiment, the flexible liquid storage bag 141 can be made of rubber, soft plastic (such as PVC material) or silicone material.

The working principle of the dirty liquid reflux collection device 14 is shown in the attached fig. 1 to 3.

According to fig. 1, when the interior of the fluid channel 13 is subjected to a vacuum suction force (i.e. the air pressure inside the fluid channel 13 is lower than the external atmospheric pressure), the fluid (here, the fluid is a mixture of air and dirt liquid) is sucked into the suction port 11 and flows to the output port 12, and at the same time, the flexible liquid bag 141 is sucked into the fluid channel 13 and occupies a part of the space inside the fluid channel 13, so that the cross-sectional area of the fluid channel 13 at the return port 131 is reduced, and thus the flow rate of the fluid is increased, and according to bernoulli's principle, the larger the flow rate of the fluid is, the smaller the pressure is, the larger the pressure difference between the interior of the fluid channel 13 and the outside is, the stronger the suction force is, and the suction efficiency of the dirt liquid is improved.

According to fig. 2, when the vacuum suction force is lost inside the fluid channel 13, the flexible liquid storage bag 141 naturally falls back under its own gravity, and protrudes toward the outside of the fluid channel 13 and expands to form a hemispherical liquid storage tank, and the dirty liquid flowing back from the output port 12 enters the liquid storage tank to be temporarily stored.

According to fig. 3, when the interior of the fluid channel 13 is again subjected to the vacuum suction force, the contaminated fluid in the flexible fluid storage bag 141 will be pumped away again.

In order to make the flexible liquid storage bag 141 recover the deformation better when the vacuum suction force is lost inside the fluid channel 13, a weight block is configured on the flexible liquid storage bag 141, and the weight of the weight block is configured to be smaller than the vacuum suction force generated in the fluid channel 13, so that the vacuum suction force can overcome the weight of the weight block to do work.

In order to prevent the dirty liquid from flowing back to the flexible liquid storage bag 141 smoothly when the vacuum suction force is lost in the fluid channel 13, the fluid channel 13 has a recessed portion recessed downward around the return port 131.

Second embodiment: the up-down positional relationship described in this embodiment corresponds to the up-down positional relationship of the fluid passages shown in fig. 4.

As shown in fig. 4 and 5, the fluid passage 23 is opened with a downward return port 231, and the return port 231 is located below the output port 22. The fluid passage 23 includes an upstream sub-passage 232 located upstream of the return port 231 and a downstream sub-passage 233 located downstream of the return port 231, and the upstream sub-passage 232 includes an end opening 236 near the return port 231, and the end opening 236 is aligned with the return port 231 up and down. Specifically, the upstream subchannel 232 includes a section of upright tube section 234, with an end opening 236 at the lowermost end of the upright tube section 234. Downstream subchannel 233 includes a start end opening 237 proximate return port 231, and downstream subchannel 233 includes a length of horizontal tube segment 235 with start end opening 237 located on horizontal tube segment 235.

In this example, the flow channel 23 is L-shaped, and the return port 231 is located at a corner of the L-shaped flow channel, i.e., a junction of the horizontal pipe segment 235 and the vertical pipe segment 234.

In other embodiments, in order to ensure that the liquid flowing back from the output port 22 flows into the return port 231 as much as possible without splashing from the return port 231 to the downstream sub-channel 233, the aperture of the end opening 236 of the upstream sub-channel 232 may be not greater than the aperture of the return port 231; in order to ensure that the dirty liquid will not splash into the downstream branch channel 233 through the return port 231 again and possibly flow to the suction port 21 to avoid secondary pollution to the floor to be cleaned, the suction port 21 is not lower than the return port 231.

The dirty liquid reflux collector 24 includes a flexible liquid storage bag 241, the flexible liquid storage bag 241 is easily deformed when the vacuum suction force is applied to the inside of the fluid channel 23, and the flexible liquid storage bag 241 is connected to the reflux port 231.

In this embodiment, the operation principle of the flexible liquid storage bag 241 is specifically shown in fig. 6 to 8.

According to fig. 6, when the inside of the fluid channel 23 is subjected to a vacuum suction force (i.e. the air pressure inside the fluid channel 23 is lower than the external atmospheric pressure), the fluid (here, the fluid is a mixture of air and dirty liquid) is sucked into the suction port 21 and flows to the output port 22, and at the same time, the flexible liquid storage bag 241 is sucked into the fluid channel 23 and occupies a part of the space inside the fluid channel 23, so that the cross-sectional area of the fluid channel 23 at the return port 231 is reduced, and thus the flow rate of the fluid is increased, and according to bernoulli's principle, the larger the flow rate of the fluid is, the smaller the pressure is, the larger the pressure difference between the inside of the fluid channel 23 and the outside is, the stronger the suction force is, and the dirty liquid suction efficiency is improved.

According to fig. 7, when the vacuum suction force is lost inside the fluid channel 23, the flexible liquid storage bag 241 naturally falls back under its own gravity, and protrudes toward the outside of the fluid channel 23 and expands to form a hemispherical liquid storage tank, and the dirty liquid flowing back from the output port 22 enters the liquid storage tank to be temporarily stored.

According to fig. 8, when the interior of the fluid channel 23 is again acted upon by the vacuum suction force, the contaminated fluid in the flexible fluid storage bag 241 will be pumped away again.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A cleaning head for a surface cleaning apparatus comprising a cleaning head body movable over a floor surface, the cleaning head body comprises at least one suction port (11; 21) capable of sucking up dirty liquid on the ground by means of vacuum suction force, an output port (12; 22) positioned above the suction port (11; 21), a fluid channel (13; 23) for fluid communication between the suction port (11; 21) and the output port (12; 22), and dirty liquid backflow collecting devices (14; 24), characterized in that the dirty liquid reflux collection device (14; 24) comprises at least one flexible liquid storage bag (141; 241) which is easy to deform under the action of the vacuum suction force, the flexible liquid storage bag (141; 241) is positioned between the output port (12; 22) and the suction port (11; 21), the flexible reservoir (141; 241) is always in fluid communication with the fluid passageway (13; 23).

2. A cleaning head for a surface cleaning apparatus as claimed in claim 1, wherein: the fluid channel (13; 23) is provided with at least one backflow port (131; 231) with a downward opening part, the backflow port (131; 231) is positioned at the lower side of the output port (12; 22), the flexible liquid storage bag (141; 241) is arranged at the backflow port (131; 231), and the interior of the fluid channel (13; 23) is in fluid communication with the flexible liquid storage bag (141; 241) through the backflow port (131; 231).

3. A cleaning head for a surface cleaning apparatus as claimed in claim 2, wherein: wherein at least a part of the flexible reservoir (141; 241) protrudes toward the outside of the fluid channel (13; 23) when the inside of the fluid channel (13; 23) is in an atmospheric pressure state.

4. A cleaning head for a surface cleaning apparatus as claimed in claim 2, wherein: wherein at least a portion of the flexible reservoir (141; 241) is drawn into the interior of the fluid channel (13; 23) when the interior of the fluid channel (13; 23) is in a vacuum-pumping state.

5. A cleaning head for a surface cleaning apparatus as claimed in claim 2, wherein: the fluid channel (13; 23) comprises an upstream subchannel (132; 232) located upstream of the return port (131; 231) and a downstream subchannel (133; 233) located downstream of the return port (131; 231), the upstream subchannel (132; 232) comprises a terminal opening (136; 236) near the return port (131; 231), and the terminal opening (136; 236) is aligned with the return port (131; 231) up and down.

6. A cleaning head for a surface cleaning apparatus as claimed in claim 5, wherein: the aperture of the end opening (136; 236) is not larger than the aperture of the return opening (131; 231).

7. A cleaning head for a surface cleaning apparatus as claimed in claim 5, wherein: the upstream subpassage (132; 232) comprises a vertical tube section (134; 234), and the end opening (136; 236) is positioned at the lowest end of the vertical tube section (134; 234).

8. A cleaning head for a surface cleaning apparatus as claimed in claim 5, wherein: the downstream sub-channel (133; 233) comprises a starting end opening (137; 237) near the return opening (131; 231), the downstream sub-channel (133; 233) comprises a horizontal pipe section (135; 235), and the starting end opening (137; 237) is positioned on the horizontal pipe section (135; 235).

9. A cleaning head for a surface cleaning apparatus as claimed in claim 5, wherein: the fluid channel (13) is T-shaped, and the return port (131) is positioned at the junction of the T-shaped fluid channel.

10. A cleaning head for a surface cleaning apparatus as claimed in claim 5, wherein: the fluid channel (23) is L-shaped, and the return port (231) is positioned at the corner of the L-shaped fluid channel.

11. A cleaning head for a surface cleaning apparatus as claimed in claim 8, wherein: the suction port (11; 21) is not lower than the return port (131; 231).

12. A cleaning head for a surface cleaning apparatus as claimed in claim 8, wherein: the cleaning head body comprises a pair of suction openings (11), the horizontal pipe section (135) comprises a pair of horizontal pipe sections (1351) which are respectively communicated with the suction openings (11), the pair of horizontal pipe sections (1351) are connected, and the return opening (131) is arranged at the joint of the pair of horizontal pipe sections (1351).

13. A cleaning head for a surface cleaning apparatus as claimed in claim 1, wherein: the flexible liquid storage bag (141; 241) is provided with a weight piece.

14. A cleaning head for a surface cleaning apparatus as claimed in claim 1, wherein: the flexible liquid storage bag (141; 241) is made of rubber or PVC material.