Liquid distribution device and cleaning machine

Abstract

The utility model discloses a liquid distribution device and a cleaning machine, and belongs to the technical field of electric tools, the liquid distribution device comprises a water inlet hole, a water outlet hole, a containing cavity and a distributor of a waterway switching piece, and the waterway switching piece has a first state and a second state according to whether liquid flows through the containing cavity or not. The waterway switching piece is provided with a first flow channel structure and a second flow channel structure. The water path switching piece is communicated with the water inlet hole and the water outlet hole through the first flow channel structure in the first state, and part of liquid flowing in from the water inlet hole returns to the first flow channel structure after flowing through the containing cavity and flows to the water outlet hole. The water path switching piece is communicated with the water inlet hole and the water outlet hole through the second flow channel structure in the second state, and liquid flowing in from the water inlet hole directly flows to the water outlet hole through the second flow channel structure. The cleaning machine adopts the liquid distribution device. The flow of the liquid flowing through the containing cavity is reduced, the concentration of the cleaning agent in the liquid flowing out of the water outlet hole is reduced, and consumption of the cleaning agent is reduced while flushing water is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a liquid dispensing device. In addition, this utility model also relates to a cleaning machine using such a liquid dispensing device. Background Technology

[0002] With the improvement of industrialization, the types and functions of power tools are becoming more and more diversified. Among them, the electric cleaning brush is a common power tool. Existing electric cleaning brushes generally include a housing, a motor and a brush disc. The motor drives the brush disc to rotate, and the rotating brush disc scrapes the object or surface to be cleaned. Electric cleaning brushes can not only be used for cleaning vehicles, but also for cleaning kitchen items, floors, walls and other surfaces, greatly reducing the cleaning difficulty for users.

[0003] To improve cleaning effectiveness, some electric cleaning brushes are equipped with a liquid supply system. This system can provide a mixture of detergent and water, or just water. The detergent-water mixture softens and breaks down dirt on the surface being cleaned, thus improving the brush's scraping effect. Water can be used to rinse the surface after cleaning, preventing detergent and foam residue from remaining.

[0004] However, when the existing liquid supply components are used to provide a mixture of detergent and water, the incoming water flows entirely through the detergent. As a result, the concentration of detergent in the mixture is relatively high, often exceeding the requirements for decomposing dirt. After scraping, a large amount of water is needed for rinsing, which easily leads to waste of water resources and excessive consumption of detergent. Utility Model Content

[0005] To address the shortcomings and deficiencies of the existing technology, this utility model provides a liquid distribution device that reduces the liquid flow rate through the receiving cavity, lowers the concentration of detergent in the liquid flowing out of the outlet, reduces the amount of water used for rinsing while slowing down detergent consumption, and reduces user operating costs.

[0006] To achieve the above-mentioned technical objectives, the liquid dispensing device provided by this utility model includes:

[0007] The distributor is equipped with an inlet, an outlet, a accommodating chamber, and a water path switching component;

[0008] The cavity is used to hold cleaning agents;

[0009] The water path switching component is located inside the distributor and is used to switch the flow path of the liquid. The water path switching component has a first state and a second state depending on whether the liquid flows through the receiving cavity.

[0010] The waterway switching component is provided with a first flow channel structure and a second flow channel structure;

[0011] The water route switcher connects the water inlet hole and the water outlet hole through the first flow channel structure in the first state, and part of the liquid flowing into the water inlet hole returns to the first flow channel structure after flowing through the accommodating cavity and flows to the water outlet hole;

[0012] The water route switcher connects the water inlet hole and the water outlet hole through the second flow channel structure in the second state, and the liquid flowing into the water inlet hole directly flows to the water outlet hole through the second flow channel structure.

[0013] Preferably, the first flow channel structure comprises a main flow channel, a branch flow hole and a return flow hole, the main flow channel is used for connecting the water inlet hole and the water outlet hole, the branch flow hole is used for connecting the main flow channel and the accommodating cavity, and the return flow hole is used for connecting the accommodating cavity and the main flow channel; in the first state, part of the liquid flowing into the main flow channel from the water inlet hole directly flows to the water outlet hole, and another part of the liquid flows to the accommodating cavity from the branch flow hole and returns to the main flow channel from the return flow hole.

[0014] Preferably, the water route switcher is provided with a return flow cavity in communication with the accommodating cavity, the main flow channel passes through the return flow cavity, the branch flow hole extends from the main flow channel towards the accommodating cavity, and the return flow hole extends from the main flow channel towards the return flow cavity.

[0015] Preferably, the extension directions of the branch flow hole and the return flow hole are opposite; and / or, the branch flow hole and the return flow hole are distributed in a staggered manner along the extension direction of the main flow channel.

[0016] Preferably, the second flow channel structure comprises a communication flow channel arranged on the outer periphery of the water route switcher; in the second state, the liquid flowing into the water inlet hole flows to the water outlet hole through the communication flow channel.

[0017] Preferably, the dispenser is provided with an accommodating cavity for accommodating the water route switcher, and the communication flow channel is arranged between the outer peripheral surface of the water route switcher and the cavity wall of the accommodating cavity.

[0018] Preferably, the communication flow channel is arranged around the water route switcher; and / or, the outer peripheral surface of the water route switcher is provided with a groove and a sealing member arranged on the outer periphery of the groove, the communication flow channel is formed by the groove wall of the groove and the cavity wall of the accommodating cavity, and the sealing member abuts against the cavity wall of the accommodating cavity.

[0019] Preferably, the water route switcher can rotate around a central axis thereof, and the water route switcher is provided with a knob located outside the dispenser; and / or, the dispenser comprises a kettle body and a kettle cover which are detachably connected, the accommodating cavity is arranged on the kettle body, the water inlet hole and the water outlet hole are arranged on the kettle cover, and the water route switcher is arranged in the kettle cover.

[0020] Preferably, the liquid dispensing device further comprises a water inlet pipe connected to the dispenser, the water inlet pipe is provided with a water inlet flow channel in communication with the water inlet hole, and the water inlet pipe is provided with a switch valve for opening and closing the water inlet flow channel; and / or, the water outlet hole is connected with a water supply member through a water outlet pipe.

[0021] The cleaning machine provided by the utility model, comprising a head and a handle, the head is provided with a cleaning part, further comprising a water supply part and the aforementioned liquid distribution device, the water supply part is connected to the water outlet hole of the distributor, and the water supply part is arranged towards the cleaning part and / or the surface to be cleaned.

[0022] After the technical scheme is applied, the utility model has the following advantages:

[0023] 1. The liquid distribution device provided by the utility model, the distributor is provided with a containing cavity and a water path switching part, the containing cavity is used for placing a cleaning agent, the water path switching part is arranged in the distributor and is used for switching the flow path of the liquid, and the water path switching part is provided with a first flow channel structure and a second flow channel structure.

[0024] When the water path switching part is in the first state, the water inlet hole and the water outlet hole are communicated through the first flow channel structure, part of the liquid flowing into the water inlet hole returns to the first flow channel structure after flowing through the containing cavity and flows to the water outlet hole, that is, part of the liquid flowing into the water inlet hole returns to the first flow channel structure after flowing through the containing cavity and flows to the water outlet hole, and the other part of the liquid flowing into the water inlet hole directly flows to the water outlet hole through the first flow channel structure. In this way, the liquid flow flowing through the containing cavity is reduced, so that the concentration of the cleaning agent in the liquid flowing out of the water outlet hole is reduced, the concentration of the cleaning agent can be reduced while meeting the requirement of dirt decomposition, so that the consumption of the cleaning agent is reduced while reducing the flushing water, and the use cost of the user is reduced.

[0025] When the water path switching part is in the second state, the water inlet hole and the water outlet hole are communicated through the second flow channel structure, the liquid flowing into the water inlet hole directly flows to the water outlet hole through the second flow channel structure, and the liquid does not flow through the containing cavity, so the liquid will not contact the cleaning agent, and the liquid can flush the surface to be cleaned.

[0026] 2. The first flow channel structure comprises a main flow channel, a branch hole and a return hole, when the water path switching part is in the first state, part of the liquid flowing into the main flow channel from the water inlet hole directly flows to the water outlet hole, and the other part of the liquid flows to the containing cavity from the branch hole and flows into the main flow channel from the return hole, the liquid flowing into the containing cavity contacts the cleaning agent, and the liquid containing the cleaning agent flows back to the main flow channel from the return hole and flows to the water outlet hole. The specific structure of the first flow channel structure is reasonably arranged, so that part of the liquid can flow through the containing cavity and contact the cleaning agent, so that the concentration of the cleaning agent in the liquid flowing out of the water outlet hole is appropriately reduced.

[0027] 3. The diversion orifice extends from the main channel towards the receiving cavity, allowing a portion of the liquid diverted from the diversion orifice to flow smoothly into the receiving cavity and come into contact with the detergent. The water circuit switching component includes a return cavity, with a return orifice extending from the main channel towards the return cavity. The mixed liquid containing detergent first flows from the receiving cavity to the return cavity, and then returns from the return cavity through the return orifice to the main channel. The well-designed structure of the water circuit switching component ensures that a portion of the liquid diverted from the diversion orifice can smoothly return to the main channel after contacting the detergent.

[0028] 4. The diversion orifice and the return orifice are preferably set in opposite directions so that the diverted liquid can fill the entire receiving cavity, improve the contact effect between the liquid and the cleaning agent in the receiving cavity, and ensure that the concentration of cleaning agent in the liquid returning to the main channel from the return orifice can meet the cleaning requirements.

[0029] The diversion orifice and the return orifice are preferably staggered along the extension direction of the main channel, so that the liquid in the main channel can only flow from the diversion orifice to the receiving cavity, and the liquid returning from the return orifice to the main channel will not flow directly from the diversion orifice back to the receiving cavity.

[0030] 5. The connecting channel of the second flow channel structure is located on the outer periphery of the water circuit switching component. When the water circuit switching component is in the second state, the liquid flowing in from the inlet hole flows directly to the outlet hole through the connecting channel. The specific structure of the second flow channel structure is reasonably designed so that the liquid flowing in from the inlet hole can flow directly to the outlet hole when the water circuit switching component is in the second state, without flowing through the receiving cavity.

[0031] 6. The distributor is equipped with a receiving cavity, and the connecting flow channel is located between the outer peripheral surface of the water channel switching component and the cavity wall of the receiving cavity. The matching structure of the water channel switching component and the distributor is reasonably designed so that the two can cooperate to form a connecting flow channel, and the first flow channel structure and the second flow channel structure will not affect each other.

[0032] 7. Preferably, the connecting flow channel is arranged in a ring around the water circuit switching component, which can increase the flow rate and volume of liquid flowing from the inlet hole to the outlet hole through the connecting flow channel.

[0033] The outer circumferential surface of the water circuit switching component is provided with a groove and a sealing element. The connecting flow channel is preferably formed by the groove wall and the cavity wall of the receiving cavity. The sealing element is located outside the groove and abuts against the cavity wall of the receiving cavity. The forming structure of the connecting flow channel is reasonably set to reduce the forming difficulty of the connecting flow channel. The sealing element prevents water leakage from the connecting flow channel, so that the liquid flowing into the connecting flow channel from the water inlet can only flow out through the water outlet.

[0034] 8. The water circuit switching component is rotatably installed inside the distributor. The water circuit switching component has a knob located outside the distributor. Users can rotate the water circuit switching component by rotating the knob to adjust its status.

[0035] The distributor comprises a kettle body and a kettle cover, a containing cavity is arranged on the kettle body, a water inlet hole, a water outlet hole and a water path switching piece are arranged on the kettle cover at the same time, and the specific structure of the distributor is reasonably arranged, so that the water path switching piece can be arranged between the water inlet hole and the water outlet hole to switch the flow path of the liquid.

[0036] 9. The liquid distributor further comprises a water inlet pipe, a water inlet channel of the water inlet pipe is communicated with the water inlet hole, a switch valve is arranged on the water inlet pipe, and a user can control the on-off of liquid supply through the switch valve. The water outlet hole is connected with a water supply piece through a water outlet pipe, and the liquid flowing through the distributor can be finally provided to the outside through the water supply piece.

[0037] 10. The cleaning machine provided by the utility model comprises a head, a handle, a water supply piece and a liquid distributor, a cleaning piece is arranged on the head, the water supply piece is connected to the water outlet hole of the distributor, the water supply piece can be arranged only towards the cleaning piece, can be arranged only towards a to-be-cleaned surface, or can be arranged as the water supply piece towards both the cleaning piece and the to-be-cleaned surface. When the water path switching piece is in the first state, only part of the liquid flows through the containing cavity, the concentration of the cleaning agent in the liquid flowing out of the water outlet hole can be appropriately reduced, the concentration of the cleaning agent can be reduced while meeting the requirement of dirt decomposition, the consumption of the cleaning agent is reduced while the flushing water is reduced, and the use cost of the user is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a structure diagram of the liquid distributor of the first embodiment;

[0039] Figure 2 It is a sectional view of the liquid distributor of the first embodiment when the water path switching piece is in the first state;

[0040] Figure 3 It is a sectional view of the liquid distributor of the first embodiment when the water path switching piece is in the second state;

[0041] Figure 4 It is an exploded view of the liquid distributor of the first embodiment;

[0042] Figure 5 It is a structure diagram of the kettle cover in the liquid distributor of the first embodiment;

[0043] Figure 6 It is an exploded view of the water path switching piece in the liquid distributor of the first embodiment;

[0044] Figure 7 It is a structure diagram of the main body part of the water path switching piece in the liquid distributor of the first embodiment;

[0045] Figure 8 It is a structure diagram of the cleaning machine of the first embodiment;

[0046] Figure 9 It is a partial structure diagram of the cleaning machine of the first embodiment;

[0047] Figure 10 Exploded view of the head and frame of the cleaning machine of Example 1;

[0048] Figure 11 Structure view of the motor and transmission structure of the cleaning machine of Example 1;

[0049] Figure 12 Sectional view of the transmission structure of the cleaning machine of Example 1;

[0050] Figure 13 Exploded view of the transmission structure of the cleaning machine of Example 1;

[0051] Figure 14 Structure view of the outer brush disc of the cleaning element of the cleaning machine of Example 1;

[0052] Figure 15 Another structure view of the cleaning element of the cleaning machine of Example 1.

[0053] In the drawings, 10 - liquid dispensing device,

[0054] 100 - dispenser, 110 - water inlet hole, 120 - water outlet hole, 130 - accommodating cavity, 140 - kettle body, 150 - kettle cover, 151 - receiving cavity, 152 - water inlet joint, 153 - water outlet joint, 154 - insertion slot, 160 - support frame, 170 - lock cap,

[0055] 200 - water path switching element, 210 - cover part, 211 - positioning block, 220 - main body part, 221 - pipe body, 222 - first pipe column, 223 - second pipe column, 224 - reinforcing rib, 225 - groove, 226 - positioning groove, 230 - backflow cavity, 240 - first flow channel structure, 241 - main flow channel, 241A - inlet end, 241B - outlet end, 242 - shunt hole, 243 - backflow hole, 250 - second flow channel structure, 251 - communication flow channel, 252 - sealing element, 260 - knob,

[0056] 300 - cleaning agent,

[0057] 401 - sealing ring A, 402 - sealing ring B, 403 - sealing ring C, 404 - sealing ring D, 405 - sealing ring E, 406 - sealing ring F, 407 - sealing ring G, 408 - sealing ring H, 409 - sealing ring J, 410 - sealing ring K,

[0058] 510 - water inlet pipe, 511 - water inlet flow channel, 512 - front pipe section, 513 - rear pipe section, 514 - convex edge, 520 - on-off valve, 521 - spherical valve body, 522 - valve cap, 523 - valve hole,

[0059] 1000 - cleaning machine,

[0060] 21 - water supply, 22 - hose, 23 - pipe joint,

[0061] 30 - head, 31 - cleaning element, 311 - inner brush disc, 312 - outer brush disc, 313 - clamping hole, 314 - recess, 315 - water outlet channel, 316 - cleaning head, 32 - housing, 33 - motor, 34 - reduction box, 35 - transmission structure, 351 - driving wheel, 352 - driven wheel, 353 - planet wheel, 3531 - upper gear part, 3532 - lower gear part, 354 - support shaft, 355 - upper frame body, 356 - lower frame body, 357 - inner shaft, 358 - outer shaft, 3581 - limiting groove, 359 - sun gear, 36 - support element, 361 - support wheel, 371 - wear sleeve, 372 - clamping head, 381 - first bearing set, 382 - second bearing set, 391 - limiting push block, 392 - spring,

[0062] 41 - handle, 42 - auxiliary handle, 43 - hoop,

[0063] 50 - handle, 51 - front rod, 52 - rear rod, 53 - coupling head,

[0064] 60 - frame, 61 - fixed frame, 62 - hinged frame, 63 - hinge head,

[0065] 70 - battery pack. DETAILED DESCRIPTION

[0066] The utility model will be further described below in combination with the drawings and specific embodiments. It should be understood that the following "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "vertical", "horizontal", "top", "bottom" and other words indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device / element must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model.

[0067] Example one

[0068] In combination Figures 1 to 7 , the liquid distribution device 10 provided by the utility model example one comprises:

[0069] The distributor 100 is provided with a water inlet hole 110, a water outlet hole 120, a containing cavity 130 and a water path switching element 200;

[0070] The containing cavity 130 is used for placing the cleaning agent 300;

[0071] The water path switching piece 200 is arranged in the dispenser 100 and is used to switch the flow path of the liquid. The water path switching piece 200 has a first state and a second state according to whether the liquid flows through the accommodating cavity 130;

[0072] The water path switching piece 200 is provided with a first flow channel structure 240 and a second flow channel structure 250;

[0073] In the first state, the water path switching piece 200 connects the water inlet hole 110 and the water outlet hole 120 through the first flow channel structure 240. The liquid flowing from the water inlet hole 110 returns to the first flow channel structure 240 after flowing through the accommodating cavity 130 and then flows to the water outlet hole 120;

[0074] In the second state, the water path switching piece 200 connects the water inlet hole 110 and the water outlet hole 120 through the second flow channel structure 250. The liquid flowing from the water inlet hole 110 directly flows to the water outlet hole 120 through the second flow channel structure 250.

[0075] When the water path switching piece 200 is in the first state, the liquid flow through the accommodating cavity 130 is reduced, thereby reducing the concentration of the cleaning agent 300 in the liquid flowing out of the water outlet hole 120. The concentration of the cleaning agent 300 can be reduced while meeting the requirements of dirt decomposition, thereby reducing the consumption of the cleaning agent 300 while reducing the flushing water, which is conducive to reducing the use cost of the user. When the water path switching piece 200 is in the second state, the liquid flowing from the water inlet hole 110 directly flows to the water outlet hole 120 through the second flow channel structure 250, and the liquid does not flow through the accommodating cavity 130, so the liquid does not contact the cleaning agent 300, and the liquid can flush the surface to be cleaned.

[0076] In combination Figure 1 , Figure 4 In this embodiment, the dispenser 100 includes a detachable combination of the kettle body 140 and the kettle cover 150, and the accommodating cavity 130 is mainly composed of the internal space of the kettle body 140. The cleaning agent 300 can be a block-shaped cleaning soap or a fluid-shaped cleaning liquid. When the cleaning agent 300 is a cleaning soap, the cleaning soap can be placed in the accommodating cavity 130 by the support frame 160, so as to increase the contact area between the liquid and the cleaning soap, thereby ensuring the concentration of the cleaning agent 300 in the mixed liquid. When the cleaning agent 300 is a cleaning liquid, the cleaning liquid is directly filled in the accommodating cavity 130. As a feasible solution of this embodiment, the kettle body 140 and the kettle cover 150 can be detachably combined through a detachable combination structure such as a threaded fitting structure or a screw fitting structure.

[0077] In order to avoid liquid leakage of the dispenser 100, the lid 150 is provided with a sealing ring A401 matched with the top surface of the kettle body 140, and the sealing ring B402 is sleeved on the outer circumferential surface of the lid 150 and is axially positioned. When the kettle body 140 and the lid 150 are combined together, the top surface of the kettle body 140 presses the sealing ring A401, and the inner wall of the lid 150 presses the sealing ring B402. The axial sealing fit between the kettle body 140 and the lid 150 is achieved by the sealing ring A401, and the circumferential sealing fit between the kettle body 140 and the lid 150 is achieved by the sealing ring B402. As an alternative to the present embodiment, the sealing ring A401 and / or the sealing ring B402 can be omitted under the premise that the dispenser 100 meets the anti-leakage requirement.

[0078] In the present embodiment, the water inlet hole 110 and the water outlet hole 120 are both arranged on the lid 150, and the water path switching piece 200 is movably arranged in the lid 150 and located between the water inlet hole 110 and the water outlet hole 120, so that the water path switching piece 200 switches the specific flow path of the liquid during the flow from the water inlet hole 110 to the water outlet hole 120. Specifically, in combination with Figure 5 , the lid 150 is provided with a receiving cavity 151 located between the water inlet hole 110 and the water outlet hole 120, the water inlet hole 110 and the water outlet hole 120 are both communicated with the receiving cavity 151, and the water path switching piece 200 is arranged in the receiving cavity 151 and can rotate around its own center axis L1. The water path switching piece 200 can be switched to the first state or the second state by rotation. In combination with Figure 6 , the water path switching piece 200 includes a cover part 210 and a main body part 220 combined together, the main body part 220 is substantially hollow and cylindrical, the cover part 210 is arranged at the top end of the main body part 220, and the cover part 210 and the main body part 220 combine to form a reflux cavity 230 with an open bottom side. When the lid 150 and the kettle body 140 are combined together, the receiving cavity 130 is communicated with the reflux cavity 230 and the reflux cavity 230 is located at the top of the receiving cavity 130, and the first flow channel structure 240 is mainly arranged in the reflux cavity 230. As an alternative to the present embodiment, the cover part 210 and the main body part 220 can also be integrally formed.

[0079] In order to facilitate the user to rotate the water path switching piece 200 to switch its state, the receiving cavity 151 is arranged through the lid 150 in the axial direction, the cover part 210 of the water path switching piece 200 is connected with a knob 260 located outside the top end of the dispenser 100, the knob 260 covers the top end of the receiving cavity 151, and the user can rotate the water path switching piece 200 through the knob 260. As a feasible solution of the present embodiment, the knob 260 and the cover part 210 can be fixed together by screws or other fasteners, and in addition, other structures such as handles can also be used instead of rotation.

[0080] In combination with Figure 2In the embodiment, the first flow channel structure 240 comprises a main flow channel 241, a branch flow hole 242 and a return flow hole 243. The main flow channel 241 is used to connect the water inlet hole 110 and the water outlet hole 120. The branch flow hole 242 is used to connect the main flow channel 241 and the accommodating cavity 130. The return flow hole 243 is used to connect the return flow cavity 230 and the main flow channel 241. In the first state, the waterway switching piece 200 is used to guide the liquid flowing from the water inlet hole 110 into the main flow channel 241. Part of the liquid directly flows to the water outlet hole 120. Another part of the liquid flows to the accommodating cavity 130 through the branch flow hole 242 and returns to the main flow channel 241 through the return flow hole 243. Specifically, in combination with Figure 7 The main body part 220 of the waterway switching piece 200 is provided with a pipe body 221 penetrating the return flow cavity 230. The hollow inner cavity of the pipe body 221 forms the main flow channel 241. The bottom side of the pipe body 221 is provided with a first pipe column 222 extending towards the accommodating cavity 130. The branch flow hole 242 is arranged on the first pipe column 222 and is in communication with the main flow channel 241. The top side of the pipe body 221 is provided with a second pipe column 223 extending towards the cover part 210. The return flow hole 243 is arranged on the second pipe column 223 and is in communication with the main flow channel 241. In order to ensure the structural strength of the main flow channel 241, a reinforcing rib 224 can be arranged between the pipe body 221 and the main body part 220. As a preferred scheme of the embodiment, the first pipe column 222 and the second pipe column 223 are arranged perpendicularly to the pipe body 221. The extension directions of the branch flow hole 242 and the return flow hole 243 are opposite to the extension direction of the main flow channel 241. As a feasible scheme of the embodiment, the main body part 220, the pipe body 221, the first pipe column 222, the second pipe column 223 and the reinforcing rib 224 can be integrally formed. As an alternative scheme of the embodiment, the extension directions of the branch flow hole 242 and / or the return flow hole 243 can also be arranged at an angle (not 90°) with respect to the extension direction of the main flow channel 241.

[0081] In the embodiment, the branch flow hole 242 and the return flow hole 243 are preferably staggered along the extension direction of the main flow channel 241. Part of the liquid flowing into the main flow channel 241 can only flow to the accommodating cavity 130 through the branch flow hole 242. The liquid returning to the main flow channel 241 through the return flow hole 243 cannot directly flow to the accommodating cavity 130 through the branch flow hole 242 again.

[0082] In order to make the liquid flowing from the branch hole 242 to the accommodating cavity 130 to be in full contact with the cleaning agent 300 before returning to the main flow channel 241 through the return cavity 230 and the return hole 243, the bottom surface of the first pipe column 222 is arranged at a level substantially equal to or slightly lower than the bottom end of the return cavity 230, so that the liquid flowing from the branch hole 242 can enter the accommodating cavity 130 to be in full contact with the cleaning agent 300, avoiding the liquid flowing from the branch hole 242 directly through the return cavity 230 to the return hole 243. In order to make the liquid mixed with the cleaning agent 300 to return to the main flow channel 241 through the return hole 243 smoothly, the top surface of the second pipe column 223 is lower than the top wall of the return cavity 230 and there is a gap between them, so that the liquid in the return cavity 230 can return to the main flow channel 241 through the return hole 243 smoothly.

[0083] In the embodiment, the water inlet hole 110 and the water outlet hole 120 are preferably arranged along the same radial direction of the lid 150 and located at the front and rear sides of the accommodating cavity 151 respectively. Correspondingly, the pipe body 221 is preferably linearly arranged along a certain radial direction of the main body 220, that is, the main flow channel 241 is preferably linearly arranged, which reduces the difficulty of forming the main body 220 and shortens the length of the main flow channel 241 as much as possible. When the water inlet hole 110, the main flow channel 241 and the water outlet hole 120 are arranged on the same radial direction, the water path switching piece 200 is in the first state. The main flow channel 241 has an inlet end 241A corresponding to the water inlet hole 110 and an outlet end 241B corresponding to the water outlet hole 120. The outer circumferential surface of the main body 220 is provided with a sealing ring C403 positioned on the outer circumference of the inlet end 241A and a sealing ring D404 positioned on the outer circumference of the outlet end 241B. The sealing ring C403 and the sealing ring D404 are in contact with the cavity wall of the accommodating cavity 151. The sealing ring C403 realizes the sealed communication between the water inlet hole 110 and the inlet end 241A of the main flow channel 241, and the sealing ring D404 realizes the sealed communication between the water outlet hole 120 and the outlet end 241B of the main flow channel 241.

[0084] In combination Figure 3 In the embodiment, the second flow channel structure 250 includes a communication flow channel 251 arranged on the outer circumference of the water path switching piece 200. In the second state, the liquid flowing from the water inlet hole 110 directly flows to the water outlet hole 120 through the communication flow channel 251. The communication flow channel 251 is arranged between the outer circumferential surface of the water path switching piece 200 and the cavity wall of the accommodating cavity 151. In combination Figure 4 、 Figure 6The outer circumferential surface of the water channel switching piece 200 is provided with a groove 225 and a sealing member 252 arranged at the periphery of the groove 225. The communication flow channel 251 is formed by the groove wall of the groove 225 and the cavity wall of the accommodation cavity 151. The sealing member 252 is in contact with the cavity wall of the accommodation cavity 151. In the embodiment, the groove 225 is arranged around the water channel switching piece 200. The sealing member 252 includes an axially positioned sealing ring E405 and a sealing ring F406 which are arranged on the outer circumferential surface of the water channel switching piece 200. The sealing ring E405 is arranged at the top side of the groove 225, and the sealing ring F406 is arranged at the bottom side of the groove 225. When the water channel switching piece 200 is arranged in the accommodation cavity 151, the sealing ring E405 and the sealing ring F406 are in contact with the cavity wall of the accommodation cavity 151. The groove wall of the groove 225, the cavity wall of the accommodation cavity 151, the sealing ring E405 and the sealing ring F406 jointly form the communication flow channel 251 around the water channel switching piece 200. In the embodiment, the main flow channel 241 is arranged in the axial height range of the groove 225 in the axial direction, i.e., the main flow channel 241 is arranged between the upper groove wall and the lower groove wall of the groove 225 in the axial direction of the water channel switching piece 200. Alternatively, the groove 225 can not be arranged around the water channel switching piece 200, i.e., the groove 225 is arc-shaped and the central angle of the groove 225 is greater than the included angle between the radial direction of the water inlet hole 110 and the radial direction of the water outlet hole 120. The cross-sectional shape of the communication flow channel 251 perpendicular to the axial direction of the water channel switching piece 200 is arc-shaped. The water inlet hole 110 and the water outlet hole 120 can be communicated through the communication flow channel 251. In this case, the sealing member 252 is arranged around the outer periphery of the groove 225. Alternatively, the groove can be arranged on the cavity wall of the accommodation cavity 151. In this case, the communication flow channel 251 is formed by the groove wall of the groove, the sealing member 252 and the outer circumferential surface of the main body 220.

[0085] In the embodiment, the cover part 210 of the water channel switching piece 200 is arranged in the accommodation cavity 151 of the kettle cover 150 and is axially positioned with the main body 220. The lower part of the cover part 210 is inserted into the top end of the main body 220. In order to prevent liquid leakage of the water channel switching piece 200, an axially positioned sealing ring G407 is arranged on the outer periphery of the cover part 210. The sealing ring G407 is in contact with the inner circumferential surface of the main body 220. The circumferential fitting gap between the cover part 210 and the main body 220 is eliminated by the sealing ring G407. The outer circumferential surface of the water channel switching piece 200 is further provided with sealing rings other than the sealing ring E405 and the sealing ring F406. The circumferential fitting gap between the water channel switching piece 200 and the kettle cover 150 is eliminated by the sealing rings including the sealing ring E405 and the sealing ring F406.

[0086] In order to enable the user to smoothly rotate the waterway switch 200 by the knob 260 to switch the state of the waterway switch 200, a linkage cooperation structure is arranged between the cover part 210 and the main body part 220 of the waterway switch 200. Specifically, the bottom surface of the cover part 210 is provided with a positioning block 211 protruding downward, and the top surface of the main body part 220 is provided with a positioning groove 226 cooperating with the positioning block 211, and the positioning block 211 is embedded in the positioning groove 226. When the user applies force to the knob 260, the knob 260 drives the main body part 220 to rotate synchronously through the cover part 210, so as to rotate the waterway switch 200 to the first state or the second state. In order to facilitate the user to know the state of the waterway switch 200, an identification corresponding to the first state and the second state can be arranged on the kettle cover 150. In addition, a position reminding structure can also be arranged between the waterway switch 200 and the kettle cover 150, and when the waterway switch 200 is switched to the first state or the second state, the waterway switch 200 cannot continue to rotate.

[0087] In the embodiment, the liquid dispensing device 10 further comprises a water inlet pipe 510 connected to the dispenser 100, the water inlet pipe 510 is provided with a water inlet flow channel 511 communicating with the water inlet hole 110, and the water inlet pipe 510 is provided with a switch valve 520 for opening and closing the water inlet flow channel 511. Specifically, the kettle cover 150 is provided with a water inlet connector 152 protruding outward around the water inlet hole 110, and the water inlet pipe 510 is connected to the dispenser 100 through the locking cap 170 cooperating with the water inlet connector 152. Further, the water inlet pipe 510 comprises a front pipe segment 512 and a rear pipe segment 513 inserted together, and the water inlet flow channel 511 is formed by combining the inner cavity of the front pipe segment 512 and the inner cavity of the rear pipe segment 513. The rear pipe segment 513 is provided with a protruding flange 514 protruding outward, the rear end of the rear pipe segment 513 is inserted into the water inlet connector 152, the locking cap 170 is detachably connected to the water inlet connector 152 through a threaded cooperation structure or a screw cap cooperation structure, the protruding flange 514 is clamped between the water inlet connector 152 and the locking cap 170 to axially position the rear pipe segment 513, and a clamped sealing ring H408 is arranged between the rear end face of the rear pipe segment 513 and the inner wall of the water inlet connector 152 to eliminate the axial cooperation gap between the rear pipe segment 513 and the dispenser 100. The switch valve 520 preferably adopts a ball valve, the switch valve 520 comprises a spherical valve body 521 and a valve cap 522, the spherical valve body 521 is provided with a valve hole 523, the inner cavity of the front pipe segment 512 is provided with a stepped surface with a front thin portion and a rear thick portion, the spherical valve body 521 is arranged in the front pipe segment 512 and located between the stepped surface and the front end face of the rear pipe segment 513, a clamped sealing ring J409 is arranged between the front side of the spherical valve body 521 and the stepped surface, a clamped sealing ring K410 is arranged between the rear side of the spherical valve body 521 and the front end face of the rear pipe segment 513, and part of the spherical valve body 521 protrudes out of the front pipe segment 512 and is fixedly connected with the valve cap 522. When the valve hole 523 corresponds to the water inlet flow channel 511, the switch valve 520 opens the water inlet flow channel 511, and external liquid can flow to the dispenser 100 through the water inlet flow channel 511. When the valve hole 523 is completely misaligned with the water inlet flow channel 511, the switch valve 520 closes the water inlet flow channel 511, and external liquid cannot flow to the dispenser 100 through the water inlet flow channel 511. As an alternative of the embodiment, the switch valve 520 can also adopt other valve structures except the ball valve, and correspondingly, the specific structure of the water inlet pipe 510 can be determined according to the specific structure of the switch valve 520.

[0088] In combination Figure 5 In the embodiment, the kettle cover 150 is provided with a water outlet connector 153 protruding outward around the water outlet hole 120, and the water outlet connector 153 can be connected to a water supply device through a hose.

[0089] In combination Figure 2When the waterway switch 200 is in the first state, the inlet end 241A of the main flow channel 241 is in communication with the water inlet hole 110, and the outlet end 241B of the main flow channel 241 is in communication with the water outlet hole 120. When the switch valve 520 opens the water inlet flow channel 511, the liquid from outside flows into the main flow channel 241 through the water inlet flow channel 511 and the water inlet hole 110, part of the liquid directly flows to the water outlet hole 120, and the other part of the liquid flows to the accommodating cavity 130 through the shunt hole 242. The liquid in the accommodating cavity 130 contacts the cleaning agent 300, the mixed liquid mixed with the cleaning agent 300 flows to the return flow hole 243 through the return flow cavity 230, the mixed liquid in the return flow hole 243 can flow to the water outlet hole 120 along the main flow channel 241, and the liquid flowing to the water outlet hole 120 flows to the water supply member along the hose and finally flows out of the water supply member. Since only part of the liquid flows through the accommodating cavity 130 to contact the cleaning agent 300, the concentration of the cleaning agent 300 in the mixed liquid flowing out of the water outlet hole 120 can be reduced, so that the concentration of the cleaning agent 300 can meet the requirements of dirt decomposition while reducing the amount of foam, thereby reducing the amount of flushing water and slowing down the consumption of the cleaning agent 300.

[0090] In combination Figure 3 When the waterway switch 200 is in the second state, the inlet end 241A of the main flow channel 241 is completely misaligned with the water inlet hole 110, and the outlet end 241B of the main flow channel 241 is completely misaligned with the water outlet hole 120. The water inlet hole 110 is in communication with the water outlet hole 120 through the communication flow channel 251. When the switch valve 520 opens the water inlet flow channel 511, the liquid from outside flows to the communication flow channel 251 through the water inlet flow channel 511 and the water inlet hole 110, and the liquid flowing into the communication flow channel 251 directly flows to the water outlet hole 120. The liquid flowing to the water outlet hole 120 flows to the water supply member along the hose and finally flows out of the water supply member.

[0091] In combination Figures 8 to 14 The embodiment also provides a cleaning machine 1000, which comprises a head 30, a handle 41, a water supply member 21, and the liquid distribution device 10 described above. The head 30 is provided with a cleaning member 31, and the water supply member 21 is arranged towards the cleaning member 31 and / or a surface to be cleaned. The embodiment takes a long handle cleaning machine as an example, and the cleaning machine further comprises a handle rod 50, which comprises a front rod 51 and a rear rod 52 connected together through a coupling head 53. The handle 41 is arranged at the front end of the handle rod 50, and the head 30 is arranged at the rear end of the handle rod 50. As an alternative to the embodiment, the handle rod 50 can also adopt a one-section structure or a three-section telescopic structure or other reasonable structures.

[0092] In this embodiment, the liquid dispensing device 10 is preferably detachably mounted on the handle 50, allowing the user to decide whether to use the liquid dispensing device 10 based on specific cleaning needs. Specifically, an auxiliary handle 42 is fixed to the handle 50 via a clamp 43, and the clamp 43 is provided with a protruding rib, combined with... Figure 5 The lid 150 has a slot 154 that mates with the raised rib. The raised rib and the slot 154 can adopt a dovetail-shaped groove mating structure. The liquid dispensing device 10 can be detachably installed on the handle 50 through the mating of the slot 154 and the raised rib. As an alternative to this embodiment, the auxiliary handle 42 can be omitted, and the clamp 43 on the handle 50 is only used for installing the liquid dispensing device 10. As an alternative to this embodiment, the positions of the raised rib and the slot can be interchanged. As an alternative to this embodiment, the liquid dispensing device 10 can also be detachably installed on the handle 50 through other means such as a snap-fit ​​and slot mating structure.

[0093] In this embodiment, the machine head 30 is preferably rotatably disposed at the rear end of the handle 50 via the frame 60. Combined with... Figure 9 , Figure 10 Specifically, the machine head 30 has a housing 32, and the frame 60 includes a fixed frame 61, a hinge frame 62, and a hinge joint 63. The fixed frame 61 is fixed to the rear end of the handle 50. The housing 32 is hinged to the fixed frame 61 through the cooperation of the hinge frame 62 and the hinge joint 63. The hinge joint 63 is located at the hinge point of the frame 60, the hinge frame 62, and the housing 32. The hinge joint 63 can loosen or lock the frame 60 and the housing 32. When the hinge joint 63 loosens the frame 60 and the housing 32, the user can adjust the tilt angle θ of the axial direction of the cleaning component 31 (shown by line L2) relative to the length direction of the handle 50 (shown by line L3), so that the cleaning component 31 can effectively contact the surface to be cleaned. When the hinge joint 63 locks the frame 60 and the housing 32, the axial direction of the cleaning component 31 (shown by line L2) relative to the length direction of the handle 50 (shown by line L3) remains stable, that is, the tilt angle θ remains stable. The specific structure of the hinge joint 63 can be referred to the existing technology, and will not be described in detail here.

[0094] In this embodiment, the cleaning component 31 is preferably a cleaning tray. The bottom surface of the cleaning tray can be provided with a single type or a mixture of cleaning elements such as bristles, sponges, and cleaning cloths. These cleaning elements can wipe and / or scrape the surface to be cleaned. Bristles can also be provided on the outer circumference of the cleaning tray. Of course, the cleaning machine can also be equipped with multiple cleaning trays, each with a different cleaning element structure on its bottom surface, so that the user can select the appropriate type based on the specific conditions of the surface to be cleaned.

[0095] Combination Figure 11The head 30 further comprises a motor 33 and a transmission structure 35, the motor 33 drives the cleaning member 31 to rotate around its own central axis L2 through the transmission structure 35, that is, the cleaning member 31 can rotate horizontally. As another scheme of the embodiment, the cleaning member 31 can also adopt a cleaning roller brush.

[0096] In the embodiment, the cleaning member 31 preferably adopts a structure of inner and outer brush discs combination, that is, the cleaning member 31 comprises an inner brush disc 311 and an outer brush disc 312, the motor 33 can drive the inner and outer brush discs to rotate in the same direction or in the opposite direction through the transmission structure 35. In the embodiment, the motor 33 preferably drives the inner and outer brush discs to rotate in the opposite direction through the transmission structure 35, the contact force between the inner brush disc 311 and the surface to be cleaned and the contact force between the outer brush disc 312 and the surface to be cleaned are in the opposite direction, so that they can offset each other, and the difficulty of use and operation of the user can be reduced. As an optional scheme of the embodiment, a reduction box 34 is further arranged between the motor 33 and the transmission structure 35, the reduction box 34 can adopt a planetary gear reduction structure.

[0097] In combination with the above, Figure 12 , Figure 13In the embodiment, the axial direction of the motor 33 is preferably perpendicular to the axial direction of the cleaning member 31, and the transmission structure 35 comprises a driving wheel 351, a driven wheel 352, a planetary wheel 353, an upper bracket 355, a lower bracket 356, an inner shaft 357, and an outer shaft 358. The driving wheel 351 is sleeved on the output shaft of the speed reducer 34, the inner shaft 357 and the outer shaft 358 are sleeved together from inside to outside, the driven wheel 352 is sleeved on the outside of the outer shaft 358 and is in engagement with the driving wheel 351, and the driving wheel 351 and the driven wheel 352 adopt a bevel gear matching structure. The lower bracket 356 is sleeved on the upper end of the outer shaft 358 and is embedded on the driven wheel 352, the lower bracket 356 and the driven wheel 352 are arranged in position in the circumferential direction, and the upper bracket 355 is arranged above the lower bracket 356. The planetary wheel 353 is arranged between the upper bracket 355 and the lower bracket 356 through a support shaft 354, the upper end of the support shaft 354 is fixed to the upper bracket 355, and the lower end of the support shaft 354 is fixed to the lower bracket 356. The planetary wheel 353 is arranged in a manner that it is smaller at the top and larger at the bottom and has an upper gear part 3531 and a lower gear part 3532, the inner shaft 357 is rotatably arranged in the outer shaft 358 through a first bearing set 381, the outer shaft 358 is rotatably arranged in the casing 32 through a second bearing set 382, and the upper end of the inner shaft 357 protrudes out of the outer shaft 358 upwards and is provided with a sun gear 359 in engagement with the lower gear part 3532. The casing 32 is fixedly provided with a support member 36 at the top of the transmission structure 35, the bottom of the support member 36 is provided with a support wheel 361 in engagement with the upper gear part 3531, the upper end of the inner shaft 357 is sleeved with a wear-resistant member 37, the upper end of the inner shaft 357 is inserted into the support wheel 361 together with the wear-resistant member 37 so that the inner shaft 357 is positioned and supported, and the lower end of the inner shaft 357 protrudes out of the outer shaft 358 downwards and is connected with a clamping joint 372. The outer brush disc 312 is detachably attached to the lower end of the outer shaft 358 through a threaded matching structure or a screw buckle matching structure, the center of the inner brush disc 311 is provided with a clamping hole 313 matched with the clamping joint 372, and the inner brush disc 311 is detachably attached to the lower end of the inner shaft 357 through the matching of the clamping hole 313 and the clamping joint 372. Figure 14 The outer brush disc 312 is provided with a recessed cavity 314 recessed from the bottom surface, and when the inner brush disc 311 and the outer brush disc 312 are respectively connected to the inner shaft 357 and the outer shaft 358, the bottom surface of the inner brush disc 311 is arranged in a manner that it is substantially flush with the bottom surface of the outer brush disc 312. As an optional solution of the embodiment, the sun gear 359 can be integrally formed with the inner shaft 357, or the sun gear 359 can be independently formed and then sleeved on the inner shaft 357. As an alternative solution of the embodiment, the transmission structure 35 can also be arranged in other structures capable of enabling the inner brush disc 311 and the outer brush disc 312 to rotate in opposite directions, and the transmission structure 35 is not limited in this regard.

[0098] To facilitate disassembly of the outer brush disc 312, the outer circumferential surface of the outer shaft 358 is provided with a plurality of circumferentially spaced limiting grooves 3581, the machine shell 32 is provided with a limiting push block 391 that can be inserted into the limiting grooves 3581 and a spring 392 that cooperates with the limiting push block 391, the limiting push block 391 is slidably arranged on the machine shell 32 and can slide towards or away from the outer shaft 358, and the spring 392 biases the limiting push block 391 away from the outer shaft 358. When it is necessary to disassemble the outer brush disc 312, the limiting push block 391 is pressed to make the limiting push block 391 slide towards the outer shaft 358 against the bias of the spring 392 and be inserted into the limiting grooves 3581, and the outer shaft 358 is circumferentially limited by cooperation of the limiting push block 391 and the limiting grooves 3581, thereby avoiding rotation of the outer shaft 358 along with the outer brush disc 312 when the user disassembles the outer brush disc 312.

[0099] In this embodiment, the bottom of the machine shell 32 is provided with the water supply element 21 above the cleaning element 31, i.e., the water supply element 21 is arranged towards the cleaning element 31, and the water supply element 21 can adopt a structure such as a spray head or a hollow water supply head with an outflow hole. In order to enable the liquid to flow between the cleaning element 31 and the surface to be cleaned, the top wall of the recessed cavity 314 is provided with a plurality of circumferentially spaced water outlet channels 315, and the specific structure of the water outlet channels 315 and the specific structure of the outer brush disc 312 can be referred to the description in CN114098567A and US20240252014A1, which will not be described here. The water supply element 21 is located directly above the water outlet channels 315, and the liquid flowing out of the water supply element 21 can flow downward through the water outlet channels 315. As an alternative to this embodiment, the water supply element 21 can also be arranged towards the surface to be cleaned, or different water supply elements can be arranged and arranged towards the cleaning element 31 and the surface to be cleaned, respectively.

[0100] In this embodiment, the cleaning machine 1000 preferably uses the battery pack 70 to supply power to the motor 33 and other electrical elements, and the battery pack 70 can be detachably attached to the front end of the handle 41. In use, the water inlet pipe 510 of the liquid dispensing device 10 can be connected to a water source such as a faucet or a water pump through the pipe joint 23 and the hose 22, and the liquid dispensing device 10 can be connected to the water outlet joint 513 and the water supply element 21 through another hose 22, and the hose 22 can be attached to the handle 50 by a pipe clamp. In addition, a switch for starting and stopping can be provided at the handle 41 or the handle 50 or the like. As an alternative to this embodiment, the cleaning machine can also be powered by a plug-in power cord.

[0101] In combination Figure 15 , the cleaning element 31 can also be arranged in other structures, in which a plurality of cleaning heads 316 are arranged on the bottom of the inner brush disc 311 in a circumferentially spaced manner, and the cleaning heads 316 can only revolve with the inner brush disc 311, or the transmission structure 35 can be improved to enable the cleaning heads 316 to revolve and rotate simultaneously with the inner brush disc 311.

[0102] When the waterway switch 200 is in the first state, the cleaning machine 1000 is in the scrubbing mode, at this time, the liquid mixed with the cleaning agent 300 is provided to the cleaning member 31, the liquid mixed with the cleaning agent 300 can flow to the surface to be cleaned from the water outlet channel 315 on the cleaning member 31, the cleaning agent 300 can decompose the dirt on the surface to be cleaned, and the cleaning member 31 can generate foam when brushing the surface to be cleaned.

[0103] When the waterway switch 200 is in the second state, the cleaning machine 1000 is in the rinsing mode, at this time, the clean water is provided to the cleaning member 31, and the clean water can flow to the surface to be cleaned from the water outlet channel 315 on the cleaning member 31, so that the surface to be cleaned after being brushed can be rinsed.

[0104] It can be understood that the cleaning member 31 can also be provided in a single brush disc structure, or the cleaning member 31 can also be provided in a multi-brush head structure.

[0105] It can be understood that the cleaning machine 1000 can also be provided in a short handle machine type and other reasonable styles.

[0106] It can be understood that the axial direction of the motor 33 and the axial direction of the cleaning member 31 can also be provided in parallel.

[0107] In addition to the preferred embodiments described above, the utility model also has other implementation manners, and those skilled in the art can make various changes and deformations according to the utility model, as long as the changes and deformations do not deviate from the spirit of the utility model, and all should belong to the range defined in the utility model claim.

Claims

1. A liquid dispensing device, comprising: a dispenser provided with an inlet, an outlet, a holding cavity and a water path switching member; the holding cavity is used for placing a cleaning agent; the water path switching member is arranged in the dispenser and is used for switching a flow path of the liquid, the water path switching member has a first state and a second state according to whether the liquid flows through the holding cavity; characterized in that, the water path switching member is provided with a first flow channel structure and a second flow channel structure; in the first state, the water path switching member is connected to the inlet and the outlet through the first flow channel structure, and part of the liquid flowing from the inlet returns to the first flow channel structure after flowing through the holding cavity and flows to the outlet; in the second state, the water path switching member is connected to the inlet and the outlet through the second flow channel structure, and the liquid flowing from the inlet directly flows to the outlet through the second flow channel structure.

2. The liquid dispensing apparatus of claim 1, wherein, the first flow channel structure comprises a main flow channel, a branch flow hole and a return flow hole, the main flow channel is used for connecting the inlet and the outlet, the branch flow hole is used for connecting the main flow channel and the holding cavity, and the return flow hole is used for connecting the holding cavity and the main flow channel; in the first state, part of the liquid flowing from the inlet to the main flow channel directly flows to the outlet, and the other part of the liquid flows to the holding cavity from the branch flow hole and returns to the main flow channel from the return flow hole.

3. The liquid dispensing device of claim 2, wherein, the water path switching member is provided with a return flow cavity connected to the holding cavity, the main flow channel passes through the return flow cavity, the branch flow hole extends from the main flow channel towards the holding cavity, and the return flow hole extends from the main flow channel towards the return flow cavity.

4. The liquid dispensing apparatus of claim 2, wherein the extension directions of the branch flow hole and the return flow hole are opposite; and / or, the branch flow hole and the return flow hole are distributed staggered along the extension direction of the main flow channel.

5. The liquid dispensing apparatus of claim 1, wherein, the second flow channel structure comprises a connecting flow channel arranged on the outer periphery of the water path switching member; in the second state, the liquid flowing from the inlet flows to the outlet through the connecting flow channel.

6. The liquid dispensing apparatus of claim 5, wherein, the dispenser is provided with a receiving cavity for accommodating the water path switching member, and the connecting flow channel is arranged between the outer periphery of the water path switching member and the cavity wall of the receiving cavity.

7. The liquid dispensing device of claim 6, wherein, the connecting flow channel is arranged around the water path switching member; and / or, the outer periphery of the water path switching member is provided with a groove and a sealing member arranged on the outer periphery of the groove, the connecting flow channel is formed by the groove wall of the groove and the cavity wall of the receiving cavity, and the sealing member abuts against the cavity wall of the receiving cavity.

8. The liquid dispensing apparatus of claim 1, wherein, the water path switching member can rotate around a central axis thereof, and the water path switching member is provided with a knob arranged outside the dispenser; and / or, the dispenser comprises a kettle body and a kettle cover which are detachably connected, the holding cavity is arranged on the kettle body, the inlet and the outlet are arranged on the kettle cover, and the water path switching member is arranged in the kettle cover.

9. The liquid dispensing apparatus of claim 1, wherein, the liquid dispensing device further comprises a water inlet pipe connected to the dispenser, the water inlet pipe is provided with a water inlet flow channel connected to the inlet, and the water inlet pipe is provided with a switch valve used for opening and closing the water inlet flow channel; and / or, the outlet is connected with a water supply member through a water outlet pipe.

10. A cleaning machine comprising a head and a handle, the head being provided with a cleaning element, characterised in that, the liquid dispensing device according to any one of claims 1 to 9 and a water supply member are further provided, the water supply member is connected to the outlet of the dispenser, and the water supply member is arranged towards the cleaning member and / or the surface to be cleaned.

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