Cleaning apparatus and change-over valve assembly

Abstract

The application provides a cleaning device and a switching valve assembly. The cleaning device comprises a valve cavity and a piston mechanism movably connected in the valve cavity. When the piston mechanism is pre-pressed at a first position by a first elastic device, a first sealing element seals a second water path, and a second sealing element opens a first water path. When the piston mechanism is moved to a second position by overcoming the elastic force of the first elastic device after being subjected to an external force, the second sealing element seals the first water path, and the first sealing element opens the second water path. The cleaning device and the switching valve assembly have simple structure, and can switch different water paths through external accessories.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and in particular to a cleaning device and a switching valve assembly. Background Technology

[0002] With the development of social productivity, people's living standards have also improved. With basic material needs met, people have begun to utilize various tools to reduce labor and improve their quality of life, leading to the emergence of household cleaning equipment that has become increasingly convenient and intelligent. Taking cleaning machines as an example, the addition of accessory brushes makes the optimization and distribution of the water circuit within the machine crucial, as this is closely related to installation, cost, and reliability. Currently, the water circuits for accessories and roller brushes on the market are controlled separately, resulting in separate and complex water circuits. Accessories are plug-and-play, but their reliability is poor, and they are prone to leaks or malfunctions. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a cleaning device and a switching valve assembly.

[0004] According to a first aspect of the present invention, a cleaning device is provided, comprising a body, a roller brush assembly, and a switching valve assembly; the switching valve assembly includes the body:

[0005] A valve body having a valve cavity, within which a first water passage and a second water passage are formed;

[0006] A piston mechanism is located within a valve chamber and is provided with a first seal and a second seal; the piston mechanism is configured to move linearly between a first position and a second position along the extension direction of the valve chamber.

[0007] A first elastic device is configured to pre-compress the piston mechanism to a first position;

[0008] When in the first position, the first seal seals the second water passage, and the second seal opens the first water passage;

[0009] When the piston mechanism is subjected to an external force and moves to the second position against the elastic force of the first elastic device, the second seal seals the first water passage; the first seal opens the second water passage.

[0010] The first water passage is configured to supply water to the roller brush assembly.

[0011] In one embodiment of the present invention, the valve body is provided with an inlet, a first outlet, and a second outlet that communicate with the valve cavity; the inlet, a portion of the valve cavity, and the first outlet form the first water path; the inlet, a portion of the valve cavity, and the second outlet form the second water path.

[0012] In one embodiment of the present invention, the valve body is cylindrical, and a first bypass pipe is also provided on the valve body, the first bypass pipe communicating with the valve cavity through a water inlet; and / or, a second bypass pipe is provided on the valve body, the second bypass pipe communicating with the valve cavity through the first water outlet; and / or, the second water outlet is an opening at one end of the valve cavity.

[0013] In one embodiment of the present invention, the water inlet is located on the valve body between the first water outlet and the second water outlet.

[0014] In one embodiment of the present invention, the first seal is configured to form an end face seal or a radial seal with the valve cavity; the second seal is configured to form an end face seal or a radial seal with the valve cavity.

[0015] In one embodiment of the present invention, the piston mechanism includes a piston rod, and the first seal is disposed at the end of the piston rod; the inner wall of the valve chamber is provided with a radially inwardly extending first flange at a position between the inlet and the second outlet; the first seal is configured to contact and seal with the end face of the first flange.

[0016] In one embodiment of the present invention, a contact end for abutting against the outside is provided at the middle position of the piston rod end. The contact end passes through the end face of the first seal and a stop portion for preventing the first seal from disengaging is formed at the end position of the contact end.

[0017] In one embodiment of the present invention, the second seal is disposed at the other end of the piston rod, and a second flange extending radially inward is provided on the inner wall of the valve chamber at a position between the inlet and the first outlet; the second seal is configured to contact and seal with the end face of the second flange.

[0018] In one embodiment of the invention, the second seal is configured to contact and seal with the inner wall of the valve cavity located between the inlet and the first outlet.

[0019] In one embodiment of the present invention, the second sealing element is an O-ring, and a stepped groove extending to the water inlet is provided on the inner wall of the valve cavity. The O-ring is configured to open the first water passage when it moves to the position of the stepped groove.

[0020] In one embodiment of the present invention, the first elastic device is a first spring sleeved on the piston rod, with one end of the first spring abutting against the stepped groove and the other end abutting against the piston rod.

[0021] In one embodiment of the present invention, the valve body includes a first valve body and a second valve body assembled together with the first valve body, and the piston mechanism is configured to move linearly in the valve cavity formed by the first valve body and the second valve body.

[0022] In one embodiment of the invention, an accessory brush assembly is further included, which is detachably connected to the body. The accessory brush assembly includes a water inlet connector configured to be inserted into a second water passage in the valve chamber and to push the piston mechanism from a first position to a second position.

[0023] In one embodiment of the present invention, a third sealing element is provided on the water inlet pipe connector. The third sealing element is configured to form a radial seal with the inner wall of the valve cavity, or to form an end face seal with a first flange provided on the inner wall of the valve cavity.

[0024] In one embodiment of the present invention, the accessory brush assembly includes a base configured for detachable connection with the body or roller brush assembly, and further includes a second elastic device located between the inlet pipe connector and the base; the inlet pipe connector is configured to move along the insertion direction of the inlet pipe and the valve body under the elastic force of the second elastic device.

[0025] In one embodiment of the present invention, the elastic force of the second elastic device is greater than the elastic force of the first elastic device.

[0026] In one embodiment of the present invention, the roller brush assembly includes a roller brush cover and a roller brush detachably connected to the body, the roller brush cover and the body forming a cavity for accommodating the roller brush; the roller brush cover is provided with an accessory brush water pipe interface communicating with the second water passage; the water inlet pipe connector is configured to extend into the valve cavity through the accessory brush water pipe interface.

[0027] In one embodiment of the present invention, the main body is provided with a main suction channel, and the roller brush cover is provided with a roller brush suction channel. The roller brush suction channel includes a straight pipe section communicating with the main suction channel and an inclined section communicating with the straight pipe section. The roller brush cover is also provided with an insertion interface communicating with the straight pipe section. The accessory suction connector in the accessory brush assembly is configured to extend from the insertion interface into the straight pipe section and be sealed and connected to the main suction channel.

[0028] The roller brush cover is provided with an openable cover plate, which is configured to cover the accessory brush water pipe interface and to seal the connector.

[0029] In one embodiment of the present invention, the roller brush suction channel is sealed to the main suction channel.

[0030] In one embodiment of the present invention, a fourth sealing element is provided at the opening end of the main suction channel, and the roller brush suction channel is configured to form an end face seal with the fourth sealing element; the accessory suction connector is configured to form a radial seal with the fourth sealing element.

[0031] In one embodiment of the present invention, the roller brush cover includes a second layer plate and a third layer plate, and the second layer plate and the third layer plate form the roller brush suction channel; the roller brush suction channel extends obliquely from the upper end of the roller brush cover to the lower end of the roller brush cover.

[0032] In one embodiment of the present invention, the cleaning equipment is a carpet cleaning machine.

[0033] According to a second aspect of the present invention, a switching valve assembly is also provided, comprising:

[0034] A valve body having a valve cavity, within which a first water passage and a second water passage are formed;

[0035] A piston mechanism is located within a valve chamber and is provided with a first seal and a second seal; the piston mechanism is configured to move linearly between a first position and a second position along the extension direction of the valve chamber.

[0036] A first elastic device is configured to pre-compress the piston mechanism to a first position;

[0037] When in the first position, the first seal seals the second water passage, and the second seal opens the first water passage;

[0038] When the piston mechanism is subjected to an external force and moves to the second position against the elastic force of the first elastic device, the second seal seals the first water passage; the first seal opens the second water passage.

[0039] In one embodiment of the present invention, the valve body is provided with an inlet, a first outlet, and a second outlet that communicate with the valve cavity; the inlet, a portion of the valve cavity, and the first outlet form the first water path; the inlet, a portion of the valve cavity, and the second outlet form the second water path.

[0040] The cleaning device and switching valve assembly of the present invention have a simple structure. When the piston mechanism driven by an external accessory moves to the second position against the elastic force of the first elastic device, it opens the second water passage and closes the first water passage. When the external force is removed, it moves to the first position under the restoring force of the first elastic device, opening the first water passage and closing the second water passage. This achieves rapid switching between different water passages.

[0041] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0042] Figure 1 This is a partial cross-sectional view of the cleaning equipment provided in this application when it is in the working mode of the accessory brush.

[0043] Figure 2 and Figure 3 These are the front view and rear view of an embodiment of the switching valve assembly provided in this application.

[0044] Figure 4 yes Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0045] Figure 5 This is a cross-sectional view of the assembly of the switching valve assembly and accessory brush assembly when the piston mechanism is in the second position.

[0046] Figure 6 This is a 3D structural diagram of the accessory brush component;

[0047] Figure 7 This is a partial three-dimensional structural diagram of the cleaning equipment with the cover closed;

[0048] Figure 8 This is a partial three-dimensional structural diagram of the cleaning equipment with the cover open;

[0049] Figure 9 After the roller brush cover is hidden Figure 7 A three-dimensional structural schematic diagram of the cleaning equipment shown in the figure;

[0050] Figure 10 This is a partial cross-sectional view of the cleaning equipment provided in this application in the accessory brush working mode from another perspective;

[0051] Figure 11 This is a cross-sectional view of another specific embodiment of the switching valve assembly when the piston mechanism is in the first position;

[0052] Figure 12 When the piston mechanism is in the second position Figure 10 A cross-sectional view of the switching valve assembly.

[0053] Figures 1 to 12 The one-to-one correspondence between the component names and the reference numerals in the figure is as follows:

[0054] 1. Body:

[0055] 10 Upstream side channel, 11 Downstream side channel, 12 Main suction channel, 13 Valve body through hole, 14 First slot;

[0056] 2. Roller Brush Components:

[0057] 20 Roller brush cover, 20a Roller brush water delivery channel, 20b Roller brush suction channel, 200 First layer plate, 201 Second layer plate, 202 Third layer plate, 203 Accessory brush water pipe interface, 204 Third slot, 205 Insertion interface, 206 Clip block, 207 Positioning boss, 208 Positioning block, 21 Cover plate, 210 Third elastic hook, 211 Handle, 22 Roller brush, 23 Nozzle, 24 Fourth seal, 25 Fifth seal, 250 Positioning groove;

[0058] 3. Attachment Brush Components:

[0059] 30 Base, 300 First elastic hook, 301 Fifth axial limiting ring surface, 31 Water inlet pipe connector, 310 Second circumferential sealing ring groove, 311 Third axial limiting ring surface, 312 Sixth axial limiting ring surface, 32 Third sealing element, 33 Second elastic device, 34 Accessory suction connector.

[0060] 4. Switching valve assembly:

[0061] 40 Valve body, 40a Valve cavity, 40b Inlet, 40c First outlet, 40d Second outlet, 400 First valve body, 401 Second valve body, 402 First bypass pipe, 403 Second bypass pipe, 404 Stepped groove, 405 Fourth axial limiting ring surface, 406 First flange, 407 Second flange;

[0062] 41 Piston mechanism, 410 First circumferential sealing ring groove, 411 First axial limiting ring surface, 412 Second axial limiting ring surface, 42 First seal, 43 Second seal, 44 First elastic device. Detailed Implementation

[0063] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0064] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0065] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0066] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0067] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0068] The cleaning equipment of this application includes a switching valve assembly, which, in conjunction with an accessory brush assembly, allows for quick switching between a roller brush operating mode and an accessory brush operating mode. For example, when the accessory brush assembly is required, it can be plugged into the corresponding position on the cleaning equipment, and the water passage for the accessory brush assembly can be opened by the switching valve assembly, allowing the clean water tank of the cleaning equipment to supply water to the accessory brush assembly.

[0069] This invention provides a switching valve assembly, comprising a valve body having a valve cavity, within which a first water passage and a second water passage are formed through different openings. For example, in one specific embodiment, the valve body is provided with an inlet, a first outlet, and a second outlet communicating with the valve cavity. The inlet, a portion of the valve cavity, and the first outlet together form the first water passage. The inlet, a portion of the valve cavity, and the second outlet together form the second water passage.

[0070] The switching valve assembly also includes a piston mechanism that moves within the valve chamber, and the piston mechanism is provided with a first seal and a second seal. The piston mechanism is configured to move linearly between a first position and a second position along the extension direction of the valve chamber.

[0071] When the piston mechanism is in the first position, the first seal seals the second water passage, and the second seal opens the first water passage. That is, external water can enter through the inlet and flow out through the first outlet within the valve chamber. When the piston mechanism moves to the second position, the second seal seals the first water passage, and the first seal opens the second water passage. External water can then enter through the inlet and flow out through the second outlet within the valve chamber.

[0072] The switching valve assembly also includes a first elastic device configured to preload the piston mechanism into a first position. When the piston mechanism is subjected to an external force, the elastic force of the first elastic device moves the piston mechanism to a second position. When the external force disappears, the piston mechanism returns to the first position under the restoring force of the first elastic device.

[0073] To facilitate better understanding, the following will be combined with... Figures 1 to 12Using two embodiments of a carpet cleaning machine, this application describes in detail the cleaning equipment and the specific structure and working principle of the switching valve assembly applied to the cleaning equipment. Of course, this switching valve assembly is not limited to use in cleaning equipment; it can also be applied to other equipment with similar functional requirements. Furthermore, the cleaning equipment can also be a floor cleaning machine, a vacuum cleaner, or other equipment besides a carpet cleaning machine.

[0074] Example 1

[0075] See Figure 1 In this embodiment, the cleaning equipment includes at least a body 1 and a roller brush assembly mounted on the body 1. When working, clean water can be sprayed onto the roller brush 22 so that the roller brush 22 can clean the stains on the ground that cannot be sucked up during rotation. In addition, the roller brush assembly can also adsorb dust, debris and wastewater on the working surface.

[0076] The cleaning equipment has a clean water tank and a wastewater tank. The main water pump delivers water from the clean water tank to the spraying mechanism through the water supply pipeline, and then sprays it onto the roller brush 22 through the spraying mechanism to clean or wet the roller brush 22.

[0077] The roller brush assembly of the cleaning equipment includes at least a roller brush cover 20 and a roller brush 22; wherein the roller brush cover 20 is detachably connected to the body 1 of the cleaning equipment, and the roller brush cover 20 and the body 1 form a cavity for accommodating the roller brush 22. The roller brush 22 is detachably connected to the body 1.

[0078] The roller brush cover 20 can be a three-layer plate structure, which may include a first layer plate 200, a second layer plate 201 and a third layer plate 202. The gap between the first layer plate 200 and the second layer plate 201 can form a roller brush water delivery channel 20a. A nozzle 23 can also be detachably connected to the roller brush cover 20. The nozzle 23 is connected to the roller brush water delivery channel 20a. The roller brush water delivery channel 20a is connected to the main water delivery channel. The main water delivery channel can be a channel set on the body 1 or it can be an independent water pipe assembly.

[0079] The cleaning equipment also includes an accessory brush assembly 3, which is detachably connected to the body 1. The accessory brush assembly 3 also has an accessory brush water supply channel, which needs to be connected to the main water supply channel to supply water to the accessory brush of the accessory brush assembly 3.

[0080] See also Figure 1 In order to switch between the water supply to the roller brush and the water supply to the accessory brush, the cleaning device of the present invention further includes a switching valve assembly 4, which is configured to connect the main water supply channel and the roller brush water supply channel 20a, or to connect the main water supply channel and the accessory brush water supply channel.

[0081] Combination Figures 2 to 4In this embodiment, the switching valve assembly 4 includes a valve body 40, a piston mechanism, and a first elastic device 44.

[0082] The valve body 40 includes a valve cavity 40a, an inlet 40b, a first outlet 40c, and a second outlet 40d connected to the valve cavity 40a. The inlet 40b connects the valve cavity 40a to the upstream channel of the main water supply channel, and the first outlet 40c connects the valve cavity 40a to the downstream channel of the main water supply channel. Along the water flow direction, the downstream channel is located below the upstream channel, meaning the water flows from the upstream channel to the downstream channel.

[0083] The valve body 40 is cylindrical, and a first bypass pipe 402 and a second bypass pipe 403 are provided on the valve body 40. The first bypass pipe 402 is connected to the valve cavity 40a through the inlet 40b, and the second bypass pipe 403 is connected to the valve cavity 40a through the first outlet 40c. The second outlet 40d is an opening at one end of the valve cavity 40a. This arrangement can control the axial dimension of the valve body 40 within a small range, so that the overall size of the cleaning equipment is small.

[0084] In detail, the valve body 40 includes a first valve body 400 and a second valve body 401 joined together. The first valve body 400 and the second valve body 401 are sealed together at their end faces to form the valve cavity 40a. An annular sealing groove is formed on the joint surface of the first valve body 400. The second valve body 401 is pressed against the joint surface of the first valve body 400 to compress a portion of the sealing ring extending from the annular sealing groove, thereby achieving a sealed connection between the two end faces.

[0085] In this embodiment, the second valve body 401 is made of an elastic material, and its splicing surface protrudes to form an annular sealing ring. After the first valve body 400 and the second valve body 401 are assembled, their annular sealing ring is squeezed into the annular sealing groove and compressed, thereby sealing the first valve body 400 and the second valve body 401 to form the valve cavity 40a.

[0086] In other embodiments, an elastic sealing gasket is provided between the splicing surfaces of the first valve body 400 and the second valve body 401, and the two are then fixedly connected by bolts.

[0087] The piston mechanism includes a piston rod 41 located within a valve chamber 40a and equipped with a first seal 42 and a second seal 43. The piston rod 41 is configured to move linearly between a first position and a second position along the extension direction of the valve chamber 40a. It should be noted that, in describing the cleaning equipment herein, the directional term "axial" refers to the linear direction of movement of the piston rod 41 within the valve chamber 40a, the directional term "circumferential" refers to the direction surrounding the axial direction, and "radial" refers to the direction perpendicular to the axial direction.

[0088] The piston mechanism includes a piston rod 41, and a first seal 42 is disposed at the end of the piston rod; a first flange 406 extending radially inward is disposed on the inner wall of the valve chamber 40a at a position between the inlet 40b and the second outlet 40d; the first seal 42 is configured to contact and seal with the end face of the first flange 406.

[0089] In detail, one end of the piston rod 41 has a first circumferential sealing ring groove 410, and the other end has a first axial limiting ring surface 411.

[0090] The second seal 43 is fitted inside the first circumferential sealing ring groove 410, and the first seal 42 is fitted on the piston rod 41 and contacts the first axial limiting ring surface 411.

[0091] Furthermore, when the piston rod 41 moves linearly to the second position within the valve chamber 40a, the second seal 43 is pressed against the piston rod 41 and part of the inner wall of the valve chamber 40a, so that the piston rod 41 and the valve body 40 form a radial sealing connection.

[0092] When the piston rod 41 moves linearly to the first position in the valve cavity 40a, the first seal 42 is pre-pressed between the first flange 406 protruding on the inner wall of the valve cavity 40a and the first axial limiting annular surface 411 of the piston rod 41, so that an end face sealing connection is formed between the piston rod 41 and the valve body 40.

[0093] In another embodiment, the first seal 42 may also be configured to completely cover one end of the piston rod 41.

[0094] The second sealing element 43 is an O-ring. A stepped groove 404 extending through to the water inlet 40b is provided on the inner wall of the valve cavity 40a. The O-ring is configured to move to the position of the stepped groove 404 to open the first water passage.

[0095] When the piston rod 41 is in the first position, the second seal 43 is located above the stepped groove 404, and there is a gap between the second seal 43 and the valve chamber 40a. After the main water pump of the cleaning equipment is started, clean water flows into the valve chamber 4a through the inlet 40b, then flows through the gap between the piston rod 41 and the inner wall of the valve chamber to the first outlet 40c, and finally is delivered to the downstream channel of the main water supply channel through the first outlet 40c. That is to say, the inlet 40b, the gap between the piston rod 41 and the inner wall of the valve chamber, and the first outlet 40c constitute the first water passage of the valve body.

[0096] The first elastic device 44 is disposed in the valve chamber 40a and configured to pre-press the piston rod 41 into a first position.

[0097] Specifically, the first elastic device 44 is a compression spring, which is mounted on the piston rod 41 and pre-compressed on the piston rod 41 and the valve body 40.

[0098] The piston rod 41 has a second axial limiting ring surface 412, and the valve cavity 40a of the valve body 40 has a raised stepped groove 404. The first elastic device 44 is pre-pressed between the second axial limiting ring surface 412 and the stepped groove 404. Furthermore, the stepped groove 404 is located between the inlet 40b and the first outlet 40c.

[0099] When in the first position, under the elastic force of the first elastic device 44, the piston rod 41 and the valve body 40 are sealed together through the end face of the first sealing member 42 to block the passage between the inlet 40b and the second outlet 40d and to open the passage between the inlet 40b and the first outlet 40c.

[0100] At this time, combined Figure 1 The cleaning equipment is in either roller brush working mode or shutdown mode. When in roller brush cleaning mode, the main unit water pump works, and clean water from the upstream channel 10 of the main water supply channel is sent into the valve chamber 40a through the inlet 40b, and then sequentially enters the downstream channel 11 of the main water supply channel and the roller brush water supply channel 20a through the first outlet 40c, and finally sprays onto the roller brush 22 from the nozzle 23.

[0101] See Figure 5 When the piston rod 41 moves to the second position after being subjected to external force and overcoming the elastic force of the first elastic device 44, the valve body 40 and the piston rod 41 are radially sealed by the second sealing member 43, blocking the passage between the inlet 40b and the first outlet 40c; while the first sealing member 42 releases the end face sealing connection between the valve body 40 and the piston rod 41 as the piston rod 41 moves, thereby allowing the inlet 40b and the second outlet 40d to be connected through the valve cavity 40a, that is, opening the passage between the inlet 40b and the second outlet 40d.

[0102] In this embodiment, the linear movement of the piston rod 41 between the first and second positions within the valve chamber 40a is accomplished by the accessory brush assembly 3.

[0103] For more details, please continue reading. Figure 5 The accessory brush assembly 3 of the cleaning equipment is detachably connected to the body 1. The accessory brush assembly 3 includes a water inlet pipe connector 31, which is configured to insert into the valve chamber 40a and push the piston rod 41 between a first position and a second position. For a clearer understanding of the structure of the accessory brush assembly 3, please refer to [reference needed]. Figure 6 .

[0104] After the inlet pipe connector 31 is inserted into the valve chamber 40a, it will push the piston rod 41 from the first position to the second position under the action of external force. At the same time, the second seal 43 is gradually pressed between the piston rod 41 and the wall of the valve chamber 40a until it reaches the second position to form a radial seal, thereby blocking the passage between the inlet 40b and the first outlet 40c.

[0105] The first seal 42 gradually moves away from the first flange 406. The water inlet pipe connector 31 is inserted into the valve chamber 40a through the second water outlet 40d, opening the passage between the water inlet 40b and the second water outlet 40d. That is, the water inlet 40b and the water inlet pipe connector 31 are connected through the valve chamber 40a. The clean water from the clean water tank of the cleaning equipment enters the valve chamber 40a through the water inlet 40b, and is finally transported to the accessory brush assembly 3 through the water inlet pipe connector 31.

[0106] In detail, when the inlet pipe connector 31 is inserted into the valve chamber 40a through the second outlet 40d, the inlet pipe connector 31 pushes the piston rod 41 to move from the first position to the second position, the end face seal between the piston rod 41 and the valve body 40 is released, and after the main pump is started, the clean water in the upstream channel enters the valve chamber 40a through the inlet 40b, and then enters the part of the valve chamber above the first seal 42 through the gap between the piston rod 41, the first seal 42 and the inner wall of the valve chamber. The inlet pipe connector 31 is provided with a radial through hole, and part of the water in the valve chamber enters the pipe connector 31 through the radial through hole.

[0107] Therefore, before the assembly of the accessory brush assembly 3, the second water route of the switching valve assembly 4 consists of the inlet 40b, the piston rod 41 and the inner wall of the valve cavity, the first seal 42 and the inner wall of the valve cavity, and the second outlet 40d.

[0108] In this embodiment, the inlet pipe connector 31 is directly inserted into the valve chamber 40a through the second outlet 40d, so that the water in the valve chamber 40a is directly introduced into the inlet pipe connector 31.

[0109] In other embodiments, the inlet pipe connector 31 can also be connected to the second outlet 40d by welding or other auxiliary structures, so that water in the valve chamber 40a flows into the inlet pipe connector 31 through the second outlet 40d.

[0110] To prevent water leakage from the fitting gap between the inlet pipe connector 31 and the valve chamber 40a, see... Figure 5 In this embodiment, a third sealing element 32 is provided on the water inlet pipe connector 31. The third sealing element 32 is configured to form a radial seal between the water inlet pipe connector 31 and the inner wall of the valve cavity 40a.

[0111] In detail, the water inlet pipe connector 31 has a second circumferential sealing ring groove 310, and the third sealing element 32 is specifically an O-ring. The third sealing element 32 is installed in the second circumferential sealing ring groove 310. When the water inlet pipe connector 31 is inserted into the valve cavity 40a of the valve body 40, the third sealing element 32 fills the space between the inner wall of the valve cavity 40a and the water inlet pipe connector 31, thus achieving a sealing effect.

[0112] In addition, in order to limit the stroke of the piston rod 41 in the valve chamber 40a, when the piston rod 41 moves from the first position to the second position in the valve chamber 40a, the water inlet pipe connector 31 and the valve body 40 cooperate through a limiting mechanism.

[0113] In detail, the limiting mechanism includes a mating third axial limiting ring surface 311 and a fourth axial limiting ring surface 405. The third axial limiting ring surface 311 is disposed on the water inlet pipe connector 31, and the fourth axial limiting ring surface 405 is disposed on the inner wall of the valve cavity 40a.

[0114] See also Figure 5 The accessory brush assembly 3 also includes a base 30 and a second elastic device 33; the base 30 is configured for detachable connection of the body 1 or the roller brush assembly together, the second elastic device 33 is located between the water inlet pipe connector 31 and the base 30, and the water inlet pipe connector 31 is configured to move along the insertion direction with the valve body 40 under the elastic force of the second elastic device 33.

[0115] The second elastic device 33 can specifically be a compression spring, which is fitted onto the water inlet pipe connector 31 and pre-pressed between the fifth axial limiting ring surface 301 and the sixth axial limiting ring surface 312.

[0116] In detail, the base 30 has a channel for communicating with the water supply channel of the accessory brush assembly 3. A portion of the water inlet pipe connector 31 is installed in this channel in a manner that allows it to move axially. The water inlet pipe connector 31 is connected to an external water pipe through a portion of the water supply pipe provided on the base, or the water inlet pipe connector 31 is directly connected to an external water pipe to deliver clean water to the brush head and other components of the accessory brush assembly. The fifth axial limiting annular surface 301 is formed by extending radially inward from the inner wall of the channel of the base 30, and the sixth axial limiting annular surface 312 is formed by extending outward from the outer peripheral wall of the water inlet pipe connector 31.

[0117] Specifically, the elastic force of the second elastic device 33 is greater than that of the first elastic device 44. This arrangement can prevent the piston rod 41 from moving in the direction of the first position due to the elastic force of the first elastic device 44, which could cause the cleaning equipment to malfunction.

[0118] In addition, the elastic force of the second elastic device 33 is greater than that of the first elastic device 44, which effectively solves the problem of water leakage caused by the unstable insertion depth of the water inlet pipe connector 31 due to the injection molding tolerance and assembly tolerance of each part.

[0119] The roller brush cover 20 is provided with an accessory brush water pipe interface 203 for the water inlet pipe connector 31 to pass through and extend into the valve cavity 40a of the valve body 40.

[0120] Combination Figure 6 and Figure 7 The base 30 of the accessory brush assembly 3 and the roller brush cover 20 are detachably connected by engaging a first elastic hook 300 and a first slot (not shown in the figure). The first elastic hook 300 is provided on the accessory brush assembly 3, and the first slot is provided on the roller brush cover 20.

[0121] When assembling the base 30 and roller brush cover 20 of the accessory brush assembly 3, first insert the water inlet pipe connector 31 into the valve chamber 40a through the accessory brush water pipe interface 203, press the base 30 so that its first elastic hook 300 elastically deforms and engages in the first slot, and is locked in the first slot under its own elastic force. The base 30 can be removed from the body 1 by reversing the operation.

[0122] In other embodiments, the first elastic hook 300 and the first card slot can also be arranged in reverse, that is, the first elastic hook 300 is arranged on the body 1, while the first card slot is arranged on the accessory brush assembly 3.

[0123] Combination Figures 8 to 10 The cleaning equipment also has a suction channel, which is designed to suck dust, debris and sewage from the work surface into the sewage tank.

[0124] The main suction channel 12 of the cleaning equipment is provided on the body 1, which is connected to the sewage tank. The roller brush cover 20 is provided with a roller brush suction channel 20b, which is connected to the main suction channel 12, and the suction port of the roller brush suction channel 20b faces the working surface in front of the roller brush 22.

[0125] refer to Figure 9 The body 1 is also provided with a valve body through hole 13 for the valve body 40 of the switching valve assembly 4 to pass through. After the body 1 and the switching valve assembly 4 are assembled, the valve body 40 extends out of the body through the valve body through hole 13 to facilitate docking with the accessory brush assembly 3.

[0126] refer to Figure 1 ,refer to Figure 10The second layer plate 201 and the third layer plate 202 of the roller brush cover 20 form a roller brush suction channel 20b. The main suction channel 12 and the roller brush suction channel 20b are sealed together by the end face of the fourth seal 24. After the roller brush cover 20 and the body 1 are connected in a fixed or detachable manner, the fourth seal 24 is pressed against the opposite end faces of the main suction channel 12 and the roller brush suction channel 20b.

[0127] Specifically, the roller brush suction channel 20b extends obliquely from the upper end of the roller brush cover 20 to the lower end of the roller brush cover 20. The roller brush suction channel 20b includes a straight pipe section communicating with the main suction channel 12, and an oblique section communicating with the straight pipe section. The straight pipe section of the roller brush suction channel 20b mates with the end face of the fourth seal 24 located at the position of the main suction channel 12 to form an end face seal.

[0128] When the main motor of the cleaning equipment is working, a negative pressure chamber is formed in its sewage tank. Under the action of the internal and external pressure difference, dust and / or debris on the working surface are sucked into the sewage tank through the roller brush suction channel 20b and the main suction channel 12 in sequence.

[0129] The accessory brush assembly 3 also includes an accessory suction connector 34, which is configured to communicate with the main suction channel 12 and close the roller brush suction channel 20b.

[0130] Combination Figure 8 and Figure 10 The roller brush cover 20 is also equipped with an insertion interface 205. The accessory suction connector 34 is inserted into the straight section of the roller brush suction channel 20b through this insertion interface 205 and communicates with the main suction channel 12. The accessory suction connector 34 passes through the fourth sealing member 24 and forms a radial seal with the side wall of the fourth sealing member 24, thereby connecting the accessory suction connector 34 with the main suction channel 12 and blocking the roller brush suction channel 20b and the main suction channel 12. The cleaning equipment has independent dedicated suction channels in different working modes, and the suction channels in the two different working modes reuse the main suction channel 12, making the overall structure of the cleaning equipment compact and simple.

[0131] Of course, in other embodiments, the cleaning device can be configured with completely independent suction channels for the roller brush assembly and the accessory brush assembly 3. These independent suction channels can share a single wastewater tank or each have its own independent wastewater tank.

[0132] Combination Figures 7 to 9 In order to prevent dirt from being sprayed out from the insertion interface 205 on the roller brush cover 20 when the cleaning equipment is in the roller brush working mode, in this embodiment, the roller brush assembly also includes a cover plate 21. The cover plate 21 is detachably connected to the roller brush cover 20 and is configured to block the insertion interface 205 and the accessory brush water pipe interface 203 on the roller brush cover 20.

[0133] The assembly of the accessory brush assembly and the disassembly of the cover plate allow for partial structural reuse, resulting in a compact structure.

[0134] In detail, the body 1 has a notch, and a second slot 14 is formed on the side wall of the notch. A positioning block 208 extends outward from the brush cover 20 to fit the notch. A latching block 206 is movably provided on the positioning block 208, and a second hook (not shown in the figure) is provided on the latching block 208 to fit the second slot 14. The brush cover 20 also includes a third elastic device (not shown in the figure) pre-pressed between the body 1 and the latching block 208, and the second hook engages with the second slot 14 under the elastic force of the third elastic device.

[0135] When subjected to external force, the latching block 208 overcomes the elastic force of the third elastic device and moves to drive the second latch to move and disengage from the second slot.

[0136] When the roller brush cover 20 and the body 1 are assembled, the positioning block 208 is inserted into the notch on the body 1, and the buckle block 206 is pressed to make the second hook insert into the second slot 14. After the external force is removed, the second hook and the second slot 14 remain engaged under the elastic force of the third elastic force.

[0137] When it is necessary to remove the roller brush cover 20 from the body 1, press the buckle block 206 again. Under the action of external force, the buckle block 206 overcomes the elastic force of the third elastic device and moves until the second hook disengages from the second slot. Then the roller brush cover 20 can be removed.

[0138] The cover plate 21 and the roller brush cover 20 are detachably connected by a matching third elastic hook 210 and a corresponding third slot 204. The third elastic hook 210 is provided on the cover plate 21, and the third slot 204 is provided on the positioning block 208 of the roller brush cover 20. In addition, for ease of operation, the cover plate 21 is also provided with a handle 211. The handle 211 has an L-shaped structure, which includes a connecting part and a holding part. The holding part is basically parallel to the surface of the cover plate, and there is an operating space between them to accommodate the insertion of fingers or tools.

[0139] Furthermore, the cover plate 21 and the brush cover 20 are hinged together by a hinge shaft, allowing it to rotate relative to the brush cover 20 to seal the insertion port 205 and the accessory brush water pipe port 203, or to open the insertion port 205 and the accessory brush water pipe port 203. In addition, the cover plate 21 remains connected to the brush cover 20 at all times, preventing the cover plate 21 from being lost.

[0140] Furthermore, when it is necessary to remove the roller brush cover 20, the handle 211 is used as one of the points of force, and the thumb presses the buckle block 206 of the roller brush cover 20, so that the second hook is disengaged from the second slot 14, and the roller brush cover can be removed. During this process, the user has two points of force, which can easily and conveniently remove the roller brush cover 20 from the body 1.

[0141] Furthermore, the cover plate 21 is provided with a fifth sealing element 25 that is adapted to the shape of the accessory brush insertion interface 205, and the cover plate 21 blocks the accessory brush insertion interface 205 on the roller brush cover 20 through the fifth sealing element 25.

[0142] To further enhance the sealing effect on the accessory insertion interface 205, in this embodiment, the seal and the roller brush cover 20 are positioned and connected by a matching positioning groove 250 and a positioning boss 207. Specifically, the positioning boss 207 is disposed on the roller brush cover 20 and surrounds the accessory insertion interface 205, and the positioning groove 250 is disposed on the fifth seal 25.

[0143] Example 2

[0144] The main difference between Embodiment 1 and Embodiment 2 lies in the sealing method between the piston rod 41 and the valve chamber 40a in the first position. For ease of understanding and to maintain brevity, this difference will be explained below with reference to the figures; identical parts will not be repeated.

[0145] In addition, to more clearly demonstrate the differences between the two embodiments, for components with the same function, the component names and reference numerals in Embodiment 2 are the same as those in Embodiment 1.

[0146] Combination Figure 10 and Figure 11 In this embodiment, the second seal 43 is located at the other end of the piston rod 41, as shown in the reference. Figure 10 In the view direction, the second seal 43 is disposed at the lower end of the piston rod 41. A second flange 407 extending radially inward is provided on the inner wall of the valve chamber 40a at a position between the inlet 40b and the first outlet 40c; the second seal 43 is configured to contact and seal with the end face of the second flange 407.

[0147] In detail, the second seal 43 covers one end of the piston rod 41, that is, the second seal 43 covers one end face and part of the outer peripheral wall of the piston rod 41.

[0148] When the inlet pipe connector of the accessory brush assembly 3 is inserted into the valve cavity 40a, pushing the piston rod 41 to the second position, the second seal 43 and the second flange 407 protruding on the inner wall of the valve cavity 40a of the valve body 40 abut against each other and are compressed and deformed under the action of the second elastic device 33, thereby forming an end face sealing connection between the piston rod 41 and the valve body 40. In addition, along the axial direction, the inlet 40b and the first outlet 40c are respectively located on both sides of the second flange 407.

[0149] When in the first working position, the piston rod 41 and the valve body 40 achieve end face sealing through the second seal 43, which reduces the moving resistance of the piston rod during operation, reduces the reliability and lifespan problems of spring force recovery caused by large moving resistance, avoids the risk of piston rod jamming failure, and at the same time reduces the user's assembly insertion force and improves convenience.

[0150] Based on the end-face sealing connection between the piston rod 41 and the valve body 40, in this embodiment, the first elastic device 44 is pre-pressed between the second axial limiting ring surface 412 and the second flange 407 of the piston rod 41.

[0151] Of course, the installation method of the first elastic device 44 is not limited to this. In other embodiments, another radially inwardly extending flange may also be provided on the inner wall of the valve cavity between the inlet 40b and the first outlet 40c. This flange is configured to cooperate with the second axial limiting annular surface 412 of the piston rod 41 to place the first elastic device 44 between the valve body 40 and the piston rod 31, and it is located between the inlet 40b and the first outlet 40c.

[0152] When the piston rod 41 is in the first position, the main water pump is started. Clean water enters the gap between the inner wall of the valve chamber and the piston rod 41, the second seal 43, and the part of the valve chamber between the second seal 43 and the first outlet 40c in sequence from the inlet 40b, and finally flows out from the first outlet 40c.

[0153] After the piston rod 41 is moved from the first position to the second position by an external force, the piston rod 41 and the valve body 40 are sealed together through the end face of the second seal 43, and the first water passage of the valve body 40 is disconnected. Meanwhile, the end face sealing connection between the piston rod 41 and the valve body 40 formed by the first seal 42 is released, and the second water passage of the valve body 41 is opened.

[0154] When the main water pump is started, clean water enters sequentially from the inlet 40b into the gap between the inner wall of the valve chamber and the piston rod 41, the first seal 42, and the part of the valve chamber between the first seal 42 and the second outlet 40d, and finally flows out from the second outlet 40d.

[0155] Of course, the connection method between the second water passage and other components such as the accessory brush assembly 3 is the same as in Embodiment 1, that is, by inserting the water inlet pipe connector 31 into the valve cavity 40 through the second water outlet 40d and then directly connecting it to the valve cavity 40, or by connecting the water inlet pipe connector 31 to the second water outlet 40d and then connecting it to the valve cavity 40.

[0156] Application scenarios:

[0157] The cleaning equipment provided by this invention can be, for example, a carpet cleaning machine. When a user needs to clean their carpet, the piston rod of the switching valve assembly is in the first position. At this time, the cleaning fluid in the clean water tank enters the valve chamber through the inlet and is connected to the roller brush through the first outlet. The water pump and roller brush motor of the cleaning machine are turned on, and the cleaning fluid in the clean water tank is sprayed onto the roller brush through corresponding pipes. The roller brush then scrubs the carpet as it rotates. The wastewater after scrubbing can be sucked into the wastewater tank of the cleaning equipment through the roller brush suction channel.

[0158] When users need to clean areas with a certain height or limited space, such as sofa surfaces, they can connect the accessory brush assembly to the cleaning device. Specifically, the user opens the cover to expose the accessory brush water pipe interface. The inlet pipe connector is inserted through this interface into the second outlet of the valve chamber, pushing the piston rod from the first position to the second position. At this time, the first water path from the inlet to the first outlet of the switching valve assembly is closed, and the cleaning solution in the clean water tank enters the accessory brush through the inlet, the second outlet, and the inlet pipe connector. This supplies the cleaning solution to the accessory brush assembly, allowing the user to clean the sofa surface by holding the accessory brush assembly.

[0159] Additionally, the accessory suction connector in the accessory brush assembly can be inserted into the straight section of the roller brush suction channel via a plug interface, and sealed together with the main suction channel, thus isolating the main suction channel from the roller brush suction channel. At this point, turning on the cleaning equipment allows the wastewater from cleaning the accessory brush assembly to be sucked into the cleaning equipment's wastewater tank.

[0160] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.

Claims

1. A cleaning device, characterized in that, It includes a body, a roller brush assembly, and a switching valve assembly; the switching valve assembly includes: A valve body having a valve cavity, in which a first water passage and a second water passage are formed; A piston mechanism is located within a valve chamber and is provided with a first seal and a second seal; the piston mechanism is configured to move linearly between a first position and a second position along the extension direction of the valve chamber. A first elastic device is configured to pre-compress the piston mechanism to a first position; When in the first position, the first seal seals the second water passage, and the second seal opens the first water passage; When the piston mechanism is subjected to an external force and moves to the second position against the elastic force of the first elastic device, the second seal seals the first water passage; the first seal opens the second water passage. The first water passage is configured to supply water to the roller brush assembly; An accessory brush assembly is detachably connected to the body and includes a water inlet connector configured to insert into a second water passage in a valve chamber and to move a piston mechanism from a first position to a second position.

2. The cleaning equipment according to claim 1, characterized in that, The valve body is provided with an inlet, a first outlet, and a second outlet that communicate with the valve cavity; the inlet, part of the valve cavity, and the first outlet form the first water path; the inlet, part of the valve cavity, and the second outlet form the second water path.

3. The cleaning equipment according to claim 2, characterized in that, The valve body is cylindrical, and a first bypass pipe is provided on the valve body. The first bypass pipe is connected to the valve cavity through a water inlet; and / or, a second bypass pipe is provided on the valve body. The second bypass pipe is connected to the valve cavity through the first water outlet; and / or, the second water outlet is an opening at one end of the valve cavity.

4. The cleaning equipment according to claim 2, characterized in that, The water inlet is located on the valve body between the first water outlet and the second water outlet.

5. The cleaning equipment according to claim 2, characterized in that, The first seal is configured to form an end face seal or a radial seal with the valve cavity; the second seal is configured to form an end face seal or a radial seal with the valve cavity.

6. The cleaning equipment according to claim 5, characterized in that, The piston mechanism includes a piston rod, and the first seal is disposed at the end of the piston rod; the inner wall of the valve chamber is provided with a radially inwardly extending first flange located between the inlet and the second outlet; the first seal is configured to contact and seal with the end face of the first flange.

7. The cleaning equipment according to claim 6, characterized in that, The piston rod has a contact end at the middle of its end for contacting the outside. The contact end passes through the end face of the first seal and has a stop portion at the end of the contact end to prevent the first seal from disengaging.

8. The cleaning equipment according to claim 6, characterized in that, The second seal is located at the other end of the piston rod, and the inner wall of the valve chamber is provided with a radially inwardly extending second flange located between the inlet and the first outlet; the second seal is configured to contact and seal with the end face of the second flange.

9. The cleaning equipment according to claim 6, characterized in that, The second seal is configured to contact and seal with the inner wall of the valve cavity located between the inlet and the first outlet.

10. The cleaning equipment according to claim 9, characterized in that, The second sealing element is an O-ring, and a stepped groove extending to the water inlet is provided on the inner wall of the valve cavity. The O-ring is configured to open the first water passage when it moves to the position of the stepped groove.

11. The cleaning equipment according to claim 10, characterized in that, The first elastic device is a first spring sleeved on the piston rod, with one end of the first spring abutting against the stepped groove and the other end abutting against the piston rod.

12. The cleaning equipment according to claim 1, characterized in that, The valve body includes a first valve body and a second valve body assembled with the first valve body, and the piston mechanism is configured to move linearly in the valve cavity formed by the first valve body and the second valve body.

13. The cleaning equipment according to claim 1, characterized in that, The inlet pipe connector is provided with a third sealing element, which is configured to form a radial seal with the inner wall of the valve cavity, or to form an end face seal with the first flange provided on the inner wall of the valve cavity.

14. The cleaning equipment according to claim 1, characterized in that, The accessory brush assembly includes a base configured for detachable connection to the body or roller brush assembly, and a second elastic device located between the inlet pipe connector and the base; the inlet pipe connector is configured to move along the insertion direction of the inlet pipe and the valve body under the elastic force of the second elastic device.

15. The cleaning equipment according to claim 14, characterized in that, The elastic force of the second elastic device is greater than that of the first elastic device.

16. The cleaning equipment according to claim 1, characterized in that, The roller brush assembly includes a roller brush cover and a roller brush detachably connected to the body. The roller brush cover and the body form a cavity for accommodating the roller brush. The roller brush cover is provided with an accessory brush water pipe interface communicating with the second water passage. The water inlet pipe connector is configured to extend into the valve cavity through the accessory brush water pipe interface.

17. The cleaning equipment according to claim 16, characterized in that, The main body is provided with a main suction channel, and the roller brush cover is provided with a roller brush suction channel. The roller brush suction channel includes a straight pipe section communicating with the main suction channel and an inclined section communicating with the straight pipe section. The roller brush cover is also provided with an insertion interface communicating with the straight pipe section. The accessory suction connector in the accessory brush assembly is configured to extend from the insertion interface into the straight pipe section and be sealed and connected to the main suction channel. The roller brush cover is provided with an openable cover plate, which is configured to cover the accessory brush water pipe interface and to seal the connector.

18. The cleaning equipment according to claim 17, characterized in that, The roller brush suction channel is sealed to the main suction channel.

19. The cleaning equipment according to claim 18, characterized in that, A fourth sealing element is provided at the opening end of the main suction channel, and the roller brush suction channel is configured to form an end face seal with the fourth sealing element; the accessory suction connector is configured to form a radial seal with the fourth sealing element.

20. The cleaning equipment according to claim 19, characterized in that, The roller brush cover includes a second layer plate and a third layer plate, and the second layer plate and the third layer plate form the roller brush suction channel; the roller brush suction channel extends obliquely from the upper end of the roller brush cover to the lower end of the roller brush cover.

21. The cleaning equipment according to claim 1, characterized in that, The cleaning equipment is a carpet cleaning machine.

22. A switching valve assembly, characterized in that, include: A valve body having a valve cavity, in which a first water passage and a second water passage are formed; A piston mechanism is located within a valve chamber and is provided with a first seal and a second seal; the piston mechanism is configured to move linearly between a first position and a second position along the extension direction of the valve chamber. A first elastic device is configured to pre-compress the piston mechanism to a first position; When in the first position, the first seal seals the second water passage, and the second seal opens the first water passage; When the piston mechanism is subjected to an external force and moves to the second position against the elastic force of the first elastic device, the second seal seals the first water passage; the first seal opens the second water passage.

23. The switching valve assembly according to claim 22, characterized in that, The valve body is provided with an inlet, a first outlet, and a second outlet that communicate with the valve cavity; the inlet, part of the valve cavity, and the first outlet form the first water path; the inlet, part of the valve cavity, and the second outlet form the second water path.

Images