CN114886335B

CN114886335B - Cleaning head and surface cleaning apparatus

Info

Publication number: CN114886335B
Application number: CN202210629846.6A
Authority: CN
Inventors: 车军伟; 武锋
Original assignee: Suzhou Simple Youwei Technology Co Ltd
Current assignee: Suzhou Simple Youwei Technology Co Ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2023-06-09
Anticipated expiration: 2042-04-14
Also published as: CN114468869B; CN114947631A; CN114916877B; CN114468869A; WO2023197971A1; CN114916877A; CN114886335A; CN114947631B

Abstract

The invention discloses a cleaning head and surface cleaning equipment with the same. The housing is configured to move over a surface to be cleaned and defines an installation space. The rolling brush capable of rotating around the axis is arranged in the installation space and comprises a rolling brush cylinder body which is limited with a containing space and a wiping piece arranged on the rolling brush cylinder body, and at least one fluid outlet is arranged on the rolling brush cylinder body. At least a portion of the fluid dispenser is disposed within the receiving space, the fluid dispenser being spaced apart from the inner surface of the roller brush body to spray fluid into the receiving space. The heating device is arranged in the accommodating space and is used for heating the fluid before flowing out from the fluid outlet. One end of the rolling brush is provided with a liquid inlet pipeline for supplying fluid to the fluid distributor, and a one-way valve is arranged in the liquid inlet pipeline. The one-way valve is arranged in the liquid inlet pipeline, so that liquid can be prevented from flowing back when the rolling brush is detached.

Description

Cleaning head and surface cleaning apparatus

The present application is a divisional application of patent application with application date 2022, 4, 14, application number 202210391579.3, and the name "cleaning head and surface cleaning apparatus".

Technical Field

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

Background

Currently, the rolling scrubber machines that are popular in the market generally include a rolling brush by which a surface to be cleaned is cleaned. Floor washers are typically provided with a cleaning liquid supply system for supplying cleaning liquid to the roller brush or the surface to be cleaned. Meanwhile, in order to improve the cleaning ability, a part of the floor washing opportunity improves the effect by heating the cleaning liquid.

However, in order to maintain the relative dryness of the floor during cleaning, the amount of cleaning liquid sprayed is small, and therefore, after the heated cleaning liquid is sprayed, whether on the roller brush or on the surface to be cleaned, the temperature is already about room temperature, and the cleaning ability is not significantly improved.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the cleaning head and the surface cleaning equipment, and the heating device and the fluid distributor are arranged in the cleaning head, so that the cleaning efficiency can be effectively improved.

In one aspect, the invention provides a cleaning head comprising

A housing for movement over a surface to be cleaned, defining an installation space;

the rolling brush can rotate around the axis and is arranged in the installation space, the rolling brush comprises a rolling brush cylinder body which is limited with an accommodating space and a wiping piece arranged on the rolling brush cylinder body, and at least one fluid outlet is formed in the rolling brush cylinder body;

a fluid dispenser disposed at least partially within the receiving space, the fluid dispenser being spaced apart from the inner surface of the roller brush cylinder to spray fluid into the receiving space;

the heating device is arranged in the accommodating space and is used for heating the fluid before flowing out from the fluid outlet;

one end of the rolling brush is provided with a liquid inlet pipeline for supplying fluid to the fluid distributor, and a one-way valve is arranged in the liquid inlet pipeline.

Optionally, one end of the rolling brush is provided with a handle, at least part of the liquid inlet pipeline is arranged in the handle, and the one-way valve is arranged in the liquid inlet pipeline positioned in the handle.

Optionally, the liquid inlet pipeline comprises a liquid inlet end and a liquid outlet end, and the one-way valve is arranged at the liquid inlet end.

Optionally, the handle is provided with conductive contact, the conductive contact sets up the feed liquor end is close to one side of round brush.

Optionally, the fluid dispenser comprises an elongate body and a flow guiding element arranged to the elongate body, and the heating means comprises a heating element arranged to the elongate body.

Optionally, the flow guiding element is provided with a flow guiding groove, and the flow guiding groove and the elongated body cooperate to form a fluid channel.

Optionally, the inner surface of the roller brush cylinder is provided with at least one liquid collecting chamber for collecting liquid sprayed from the fluid dispenser, and the liquid in the liquid collecting chamber is discharged from the roller brush cylinder through the fluid outlet.

Optionally, the liquid collecting chamber is an annular groove extending along the circumferential direction of the rolling brush, and at least one flow blocking structure is arranged in the annular groove and used for blocking at least part of fluid from moving relative to the rolling brush cylinder body so as to enable at least part of fluid to be gathered near the fluid outlet.

Optionally, the liquid collecting chamber corresponds to a liquid outlet of the fluid distributor, so that the fluid sprayed from the liquid outlet of the fluid distributor directly falls into the liquid collecting chamber.

In another aspect, the invention also provides a surface cleaning apparatus comprising a cleaning liquid supply system comprising a cleaning liquid tank and a supply line in fluid communication with a liquid feed line in a cleaning head as described above to supply cleaning liquid to a fluid dispenser.

The invention provides a cleaning head and surface cleaning equipment with the same. The housing is configured to move over a surface to be cleaned and defines an installation space. The rolling brush capable of rotating around the axis is arranged in the installation space and comprises a rolling brush cylinder body which is limited with a containing space and a wiping piece arranged on the rolling brush cylinder body, and at least one fluid outlet is arranged on the rolling brush cylinder body. At least a portion of the fluid dispenser is disposed within the receiving space, the fluid dispenser being spaced apart from the inner surface of the roller brush body to spray fluid into the receiving space. The heating device is arranged in the accommodating space and is used for heating the fluid before flowing out from the fluid outlet. One end of the rolling brush is provided with a liquid inlet pipeline for supplying fluid to the fluid distributor, and a one-way valve is arranged in the liquid inlet pipeline. The heating device and the fluid distributor are arranged in the rolling brush, so that the temperature of the cleaning fluid reaching the rolling brush or the surface to be cleaned can be effectively improved, and the cleaning efficiency is increased. Meanwhile, the one-way valve is arranged in the liquid inlet pipeline, so that liquid backflow can be prevented when the rolling brush is detached.

Drawings

FIG. 1 is a schematic view of a surface cleaning apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a cleaning solution supply system according to an embodiment;

FIG. 3 is a schematic view showing a structure of a rolling brush for removing a wiping piece in an embodiment;

FIG. 4 is a cross-sectional view of a roll brush with a wiper blade in one embodiment;

FIG. 5 is an enlarged view of area A of the embodiment of FIG. 4;

FIG. 6 is a schematic view illustrating a structure of a handle according to an embodiment;

FIG. 7 is a schematic view of a handle at another angle;

FIG. 8 is a partial cross-sectional view of a roll brush in an embodiment;

FIG. 9 is an exploded view of the structure of a roller brush in an embodiment;

FIG. 10 is a cross-sectional view along the axial direction of the roll brush in one embodiment;

FIG. 11 is an enlarged view of area B of FIG. 10;

FIG. 12 is a schematic view of a roller brush with a half of the barrel removed in an embodiment;

FIG. 13 is a partial cross-sectional view of a fluid dispenser in one embodiment;

FIG. 14 is a schematic view of a first channel of the flow directing element;

FIG. 15 is a schematic view of a second channel in the flow directing element;

FIG. 16 is a schematic view of a half roll brush cartridge;

fig. 17 is a partial cross-sectional view of a roll brush cartridge.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The present application discloses a surface cleaning apparatus, which may be an upright surface cleaning apparatus, a hand-held surface cleaning apparatus or a self-propelled surface cleaning apparatus, without being limited in detail herein. Arrows in the figure indicate fluid flow directions. Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a surface cleaning apparatus according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a cleaning solution supply system according to an embodiment. Fig. 1 and 2 illustrate an upright type cleaning apparatus, in which a surface cleaning apparatus 100 includes a cleaning liquid supply system for supplying a cleaning liquid to a surface to be cleaned or a wiping piece for wiping the surface to be cleaned. The cleaning liquid supply system comprises a cleaning liquid tank 31 and a supply line 32 in fluid communication with the cleaning liquid tank 31. A water pump is provided in the supply line 32. The surface cleaning apparatus 100 further comprises a cleaning head 10 comprising a housing 2 movable over the surface to be cleaned, the housing 2 defining a mounting space. In an upright apparatus, the cleaner head 10 may be pivotally connected to the main body, in a handheld apparatus, the cleaner head 10 may be connected to the main body via an extension tube, and in a self-propelled cleaning apparatus, such as a sweeping robot, the housing 2 of the cleaner head 10 is at least part of the main housing of the sweeping robot, although the main housing of the sweeping robot may be of the same construction as the housing 2 of the cleaner head 10.

With continued reference to fig. 3-7, fig. 3 is a schematic diagram of a rolling brush for removing a wiping piece in an embodiment. FIG. 4 is a cross-sectional view of a roll brush with a wiper blade in one embodiment. Fig. 5 is an enlarged view of region a in the embodiment shown in fig. 4. FIG. 6 is a schematic view of a handle according to an embodiment. Fig. 7 is a schematic view of a handle at another angle. Referring to fig. 1, the cleaning head 10 is provided with a roller brush 11, and the roller brush 11 is mounted in a mounting space defined by the housing 2. As shown in fig. 3 to 5, the roller brush 11 is rotatable about its own axis, and the roller brush 11 includes a roller brush body 7 and a wiper piece 12 provided on the roller brush body. The outer circumference of the roll brush cylinder 7 may be provided with a wiping piece 12. The wipe member 12 may be comprised of one or more of bristles, sponge, floss, cotton, and the like, without limitation. The wiping part 12 rotates substantially in synchronism with the roller brush cylinder to clean the surface to be cleaned. The wiping piece 12 can also be detached from the roller brush cylinder 7 independently, so as to be convenient for the user to replace. Referring to fig. 8-11, fig. 8 is a partial cross-sectional view of a roll brush in one embodiment. Fig. 9 is an exploded view of the structure of the roll brush in one embodiment. Fig. 10 is a sectional view along the axial direction of the roll brush in one embodiment. Fig. 11 is an enlarged view of region B in fig. 10. In order to ensure that the temperature of the cleaning liquid supplied from the cleaning liquid tank 31 reaches the roller brush or the surface to be cleaned, which is well above room temperature, the present invention particularly provides the fluid dispenser 4 and the heating means in the accommodation space of the roller brush. Specifically, the fluid dispenser 4 is at least partially disposed within the receiving space, and the fluid dispenser 4 is spaced apart from the inner surface of the roller brush body 7 to spray fluid into the receiving space. Referring to fig. 10 and 11, the fluid dispenser 4 includes a plurality of fluid outlets 41 spaced apart in the axial direction of the roll brush, and fluid ejected from the fluid outlets 41 flows into a space defined by the fluid dispenser 4 and the inner surface of the roll brush body 7, and at least a part of the fluid is sprayed from the fluid outlet 71 on the roll brush body 7 to the wiping piece and/or the surface to be cleaned as the roll brush rotates. In order to shorten the flow path from the heated fluid to the fluid outlet 71, a heating device is provided in the accommodating space for heating the fluid before flowing out from the fluid outlet 71. One end of the roller brush is provided with a liquid feed line 33 for feeding fluid to the fluid distributor 4, the liquid feed line 33 being in fluid communication with the feed line 32. Referring to fig. 6 to 9, when the user needs to clean or replace the roller brush alone, the roller brush needs to be removed, and in order to prevent the liquid remaining in the fluid dispenser 4 in the roller brush from flowing out of the liquid inlet pipe 33, a check valve 34 is provided in the liquid inlet pipe 33. The liquid inlet pipeline 33 comprises a liquid inlet end and a liquid outlet end, and the one-way valve 34 is arranged at the liquid inlet end. A filter may also be provided upstream of the one-way valve 34.

Referring to fig. 5-7, one end of the rolling brush is provided with a handle 6, the handle 6 is used for detachably mounting the rolling brush on the housing, at least part of the liquid inlet pipeline 33 is arranged in the handle 6, and the one-way valve 34 is arranged in the liquid inlet pipeline 33 positioned in the handle 6. With continued reference to fig. 5-7, at least a portion of the feed line 33 is disposed substantially coaxially with the axis of rotation of the roller brush. The handle 6 is also provided with a liquid inlet pipeline 33 for liquid to enter the accommodating space and/or a circuit channel for the power supply line 61 to enter the accommodating space. The handle 6 is provided with a locking structure for detachably fixing the roll brush to the housing. In one embodiment, the locking structure may be a magnetic material, the roller brush being fixed by the magnetism created between the two pieces of magnetic material.

Referring to fig. 6 or 7, to power the heating means, the handle 6 is provided with electrically conductive contacts 62, the electrically conductive contacts 62 being connected to a power source (battery pack or municipal power source) of the surface cleaning apparatus. The conductive contact 62 is disposed on the side of the liquid feed end adjacent to the roller brush. The two conductive contacts 62 may be arranged vertically, i.e. the two conductive contacts 62 are substantially the same horizontal distance from the liquid inlet end. Of course, the two conductive contacts 62 may be arranged horizontally or obliquely, that is, the horizontal distances from the two conductive contacts 62 to the liquid inlet end are different, so that it is ensured that even if water leaks from the liquid inlet end, a short circuit is not formed between the two conductive contacts 62.

Referring to fig. 12-15, and 8-11, fig. 12 is a schematic view of a structure of a roller brush with a half of a cylinder removed in an embodiment. Fig. 13 is a partial cross-sectional view of a fluid dispenser in an embodiment. Fig. 14 is a schematic structural view of the first channel in the flow guiding element. Fig. 15 is a schematic structural view of the second channel in the flow guiding element. The fluid dispenser 4 and the heating means are described in detail with reference to the figures. The fluid dispenser 4 comprises an elongated body 42 and a flow guiding element 43 arranged within the elongated body 42. Referring to fig. 12 and 9, the elongated body 42 comprises a first end and a second end arranged opposite in its length direction. The first end is provided with a first fixing portion 44, and the first fixing portion 44 is detachably fixed to a first end cap 45 connected to the handle 6. The second end is provided with a second fixing portion 46, wherein the outer circumferences of the first fixing portion 44 and the second fixing portion 46 are each provided with a bearing to which both ends of the rolling brush cylinder 7 are mounted so that the rolling brush cylinder 7 rotates with respect to the fluid distributor 4. The second fixing portion 46 is rotatably mounted to a second end cap 47 through a bearing, and the second end cap 47 is used for mounting the roll brush cartridge. The first end cap 45 is fixedly connected to the fluid dispenser and both remain relatively stationary. Referring to fig. 12-15, the elongated body 42 is an elongated hollow cylinder, the flow guiding element 43 is disposed inside the elongated body 42, the flow guiding element 43 is provided with a flow guiding groove, and the flow guiding groove cooperates with the elongated body 42 to form a flow guiding channel 48 for guiding the fluid to the liquid outlet 41 formed on the elongated body 42. Further, a ring of sealing strips 483 is arranged on the periphery of the diversion trench, and the sealing strips 483 are respectively contacted with the diversion element 43 and the slender body 42 to prevent fluid from flowing out of the diversion channel 48. As shown in fig. 14 and 15, the diversion channel 48 includes a first channel 481 and a second channel 482 which communicates with the first channel 481 and is provided downstream of the first channel 481. At least a portion of the first channel 481 extends in a lengthwise bend. The bending extension may be a roundabout extension or a spiral extension. At least a portion of the second channel 482 extends along the length of the elongate body 42. At least a portion of the second channel 482 corresponds to the outlet 41 of the fluid dispenser 4, and fluid in the second channel 482 is discharged through the outlet 41. Referring to fig. 13, the elongated body 42 is provided with at least one set of liquid outlets (fig. 13) including a plurality of liquid outlets 41, the plurality of liquid outlets 41 being spaced between the first and second ends. The liquid outlet 41 is arranged in this way, so that uniform liquid outlet along the length direction of the slender body 42 can be effectively ensured. In order to make the liquid output of each liquid outlet 41 relatively uniform, the inlets of the second channels 482 are generally disposed at intermediate positions corresponding to a group of liquid outlets.

Referring to fig. 8-12, the heating device is for heating a fluid and, in the embodiment shown, includes a heating element 51 disposed on the elongate body 42. In the embodiment shown in the figures, the heating means is used to heat the fluid before it flows out of the fluid dispenser 4, and the heated fluid then flows out of the fluid dispenser 4. Referring to fig. 12, a heating element 51 is disposed in a heating region defined by the elongate body 42. As shown in the illustrated embodiment, the heating zone may occupy only a portion of the elongated body 42. In other embodiments, the heating zone may also be distributed throughout the elongated body 42. The heating element 51 may be an electrical heating plate that is affixed to the heating region of the elongate body 42 by means of adhesive or the like. The heating element 51 may also be etched directly onto the elongated body 42, and will not be described in detail herein with respect to the etching process. When the elongated body 42 includes an outer wall and an inner wall, the heating element 51 may be disposed on either the outer wall or the inner wall of the elongated body 42, depending on the shape and physical requirements of the elongated body 42. The elongated body 42 corresponding to the heating region is generally supported by a material having good thermal conductivity, and may be made of a metal material or other materials having good thermal conductivity, which will not be described in detail herein. The flow guiding element 43 is generally made of a material with good heat insulation performance, so as to prevent heat loss. The heating device may also be a steam generator for generating steam which is sprayed through the fluid outlet onto the wipe and/or the surface to be cleaned.

In one embodiment, the heating area is disposed at the lower end of the elongated body 42 along the gravity direction, and the flow guiding element 43 is disposed above the heating area, so that, in the working process of the heating device, the fluid in the flow guiding channel 48 clings to the heating area due to the gravity, and even if the flow in the flow guiding channel 48 is insufficient, the liquid can fully contact with the heating area, so as to ensure the heating effect of the liquid. The elongated body 42 may be made of a material having good thermal conductivity, such as copper, aluminum, solid thermally conductive silicone, etc., and is not limited in detail herein.

In other embodiments, the fluid dispenser 4 may be a separate conduit, and the periphery or the interior of the conduit may be provided with a heating device, and the peripheral wall of the conduit may be provided with a liquid outlet. When the heating device is arranged on the periphery of the conduit, and heat is transferred through the conduit, the conduit can be made of a material with good heat conduction performance. When the heating means is located inside the conduit, or when the heating means is remote from the fluid dispenser 4, the conduit may be supported by a material that provides relatively good thermal insulation.

Referring to fig. 8-11, since the fluid dispenser 4 does not rotate with the roller brush, fluid discharged from the fluid dispenser 4 is discharged after entering the annular cavity. In order to ensure a rapid discharge of liquid from the fluid outlet 71, a plurality of liquid collecting chambers 74 corresponding to the liquid outlet 41 are provided in the accommodation space of the roller brush body 7, the plurality of liquid collecting chambers 74 are arranged at intervals in the axial direction of the roller brush, the roller brush body 7 is provided with at least one group of fluid outlets 71, and the liquid flowing out from the liquid outlet 41 is collected by the liquid collecting chambers 74 and then discharged through the fluid outlets 71. The liquid outlets 41 are arranged at intervals along the axial direction of the rolling brush, liquid sprayed out of each liquid outlet 41 is collected by the corresponding liquid collecting chamber 74 and then discharged through the fluid outlet 71, so that the cleaning liquid can be uniformly discharged along the axial direction of the rolling brush, meanwhile, the liquid collecting chambers 74 are distributed at intervals, the liquid sprayed out of the liquid outlets 41 can be effectively ensured to be discharged after being collected into the liquid collecting chamber 74 for the first time, and a large amount of cleaning liquid is prevented from being accumulated in the accommodating space inside the rolling brush. The liquid collecting chamber 74 may be defined by a flow blocking structure 75 protruding outwards from the inner wall of the roller brush body 7, the flow blocking structure 75 may define a closed and independent space, and the flow blocking structure 75 may also be a baffle structure with a fluid inlet, and the baffle structure prevents the fluid therein from rotating relative to the roller brush body 7.

Referring to fig. 16-17, and also to fig. 11, in another embodiment, since the liquid collecting chamber 74 rotates along with the roller brush body 7, the liquid discharged from the liquid outlet 41 is likely not to be collected by the liquid collecting chamber 74. Thus, the liquid collecting chamber 74 is an annular groove extending in the circumferential direction of the roll brush, which corresponds to the liquid outlet 41 during rotation of the roll brush, i.e. most or even all of the fluid ejected from the liquid outlet 41 is collected by the annular groove. Referring to fig. 16, at least one flow blocking structure 75 is disposed within the annular recess, the flow blocking structure 75 being adapted to block at least a portion of the fluid from moving relative to the roller brush body 7 such that at least a portion of the fluid is collected in the vicinity of the fluid outlet 71. The flow blocking structure 75 is generally arranged downstream of the fluid outlet 71 in the direction of rotation of the roller brush, such that the flow blocking structure 75 can block at least part of the fluid, which part of the fluid will flow out of the fluid outlet 71 due to centrifugal force, to rotate with the roller brush. The flow blocking structure 75 may be a baffle extending in the axial direction of the roller brush, the baffle directly closing the annular groove such that fluid cannot circulate freely along the annular groove. The flow blocking structure 75 may also be a stop disposed about the fluid outlet 71 that does not completely enclose the annular recess, but only blocks a portion of the fluid held adjacent the fluid outlet 71 from which the remainder of the fluid may flow. With this arrangement, the advantage is avoided that most of the fluid is collected at the fluid outlet 71, but the fluid outlet 71 cannot completely remove the fluid, and the surplus fluid overflows into the accommodating space, resulting in energy loss. In other embodiments, the plurality of fluid outlets 71 may be disposed on both sides of the flow blocking structure 75 along the rotation direction of the rolling brush.

Further, to ensure that most of the liquid discharged from the liquid outlet 41 is collected in the liquid collecting chamber 74. The liquid collection chamber 74 corresponds to the liquid outlet 41 of the fluid dispenser 4 such that the fluid sprayed from the liquid outlet 41 of the fluid dispenser 4 falls directly into the liquid collection chamber 74. In particular, the outlet 41 of the fluid distributor 4 may also protrude into the annular groove. Further, in order to avoid that the fluid outside the liquid collecting chamber 74 is not smoothly discharged, at least one fluid outlet 71 may be provided outside the liquid collecting chamber 74.

Referring to fig. 9, in one embodiment, the roller brush cylinder 7 includes a first cylinder 72 and a second cylinder 73, each of which includes at least one semi-circular recess, which are secured together by bolts or other securing means after manufacture to form a complete annular recess. In this embodiment, the annular groove is defined by two annular plates which protrude with respect to the inner wall of the roller body 7. In other embodiments, the annular groove may be formed by recessing the inner wall of the roller brush cylinder 7. Of course, other maturing processes can be used to form spaced grooves in a hollow roller body 7.

Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims

1. A cleaning head, comprising

one end of the rolling brush is provided with a liquid inlet pipeline for supplying fluid to the fluid distributor, and a one-way valve is arranged in the liquid inlet pipeline; one end of the rolling brush is provided with a handle, at least part of the liquid inlet pipeline is arranged in the handle, and the one-way valve is arranged in the liquid inlet pipeline positioned in the handle; the liquid inlet pipeline comprises a liquid inlet end and a liquid outlet end, the handle is provided with a conductive contact, and the conductive contact is arranged on one side of the liquid inlet end, which is close to the rolling brush.

2. The cleaning head of claim 1, wherein the cleaning head comprises a cleaning head,

the fluid dispenser includes an elongated body and a flow directing element disposed on the elongated body, and the heating device includes a heating element disposed on the elongated body.

3. A cleaning head according to claim 2, wherein the cleaning head comprises a cleaning head,

the flow guiding element is provided with a flow guiding groove, and the flow guiding groove is matched with the slender body to form a fluid channel.

4. The cleaning head of claim 1, wherein the cleaning head comprises a cleaning head,

the inner surface of the roller brush cylinder is provided with at least one liquid collecting chamber for collecting liquid sprayed from the fluid distributor, and the liquid in the liquid collecting chamber is discharged out of the roller brush cylinder from the fluid outlet.

5. The cleaning head of claim 4 wherein the cleaning head is configured to move the cleaning head,

the liquid collecting chamber is an annular groove extending along the circumferential direction of the rolling brush, at least one flow blocking structure is arranged in the annular groove and used for blocking at least part of fluid from moving relative to the rolling brush cylinder body so as to enable at least part of fluid to be gathered near the fluid outlet.

6. The cleaning head of claim 5 wherein the cleaning head is configured to move the cleaning head,

the liquid collecting chamber corresponds to the liquid outlet of the fluid distributor, so that the fluid sprayed from the liquid outlet of the fluid distributor directly falls into the liquid collecting chamber.

7. A surface cleaning apparatus comprising a cleaning liquid supply system comprising a cleaning liquid tank and a supply line in fluid communication with a liquid feed line in a cleaning head according to any one of claims 1 to 6 for supplying cleaning liquid to a fluid dispenser.