Wet cleaning device

Abstract

This application relates to a wet cleaning device. The present invention discloses a control valve for controlling fluid transmission. The control valve includes a valve body defining two relatively independent first and second channels, and the control valve is configured to control the opening / closing of the first channel or the second channel. A first inlet and a first outlet fluidly connected to the first channel, and a second inlet and a second outlet fluidly connected to the second channel. Wherein, the first inlet, the first outlet, the second inlet and the second outlet are substantially at the same height. It can effectively reduce the height of the control valve, thereby reducing the installation space of the control valve and making its installation more convenient.

Description

[0001] This application is a divisional application of the invention patent application with the application date of March 22, 2021, the application number of 202110303093.5, and the invention name of "Control Valve and Surface Cleaning Device". Technical Field

[0002] The present invention relates to the field of cleaning technology, and particularly to a wet cleaning device. Background Art

[0003] A plunger valve is composed of parts such as a valve body, a valve cover, a valve stem, a plunger, a hole frame, a sealing ring, etc. During operation, the valve stem drives the plunger to reciprocate up and down in the hole frame to complete the opening and closing functions of the valve. In the valve, an interference fit is adopted between the plunger and the sealing ring, so that the lateral force generated by the compression of the sealing ring seals the hole surface in the valve body and the outer circle of the plunger, thereby ensuring the sealing performance of the valve, preventing internal and external leakage, and enabling the valve to be quickly opened and closed. Compared with a globe valve, the plunger valve has a longer service life and is more labor-saving in operation. However, its adjustment stroke is longer than that of the globe valve. Therefore, it has a higher height and occupies a larger space, and has requirements for the installation space during use. When the installation space is small, it is not suitable to install a plunger valve. Summary of the Invention

[0004] In order to solve the above technical problems, the main object of the present invention is to provide a control valve, aiming to reduce the installation height of the plunger valve so that it can be applicable to more installation scenarios.

[0005] To achieve the above object, a control valve proposed by the present invention for controlling fluid transmission includes:

[0006] A valve body defining two relatively independent first channels and second channels, and the control valve is configured to control the opening / closing of the first channel or the second channel;

[0007] A first inlet and a first outlet fluidly connected to the first channel, and

[0008] A second inlet and a second outlet fluidly connected to the second channel,

[0009] wherein, the first inlet, the first outlet, the second inlet and the second outlet are substantially at the same height.

[0010] Optionally, the control valve further includes four pipes, namely:

[0011] A first inlet pipe extending along the first inlet and a first outlet pipe extending along the first outlet; and

[0012] A second inlet pipe extending along the second inlet and a second outlet pipe extending along the second outlet;

[0013] Optionally, the first inlet pipe and the first outlet pipe are substantially coaxially arranged;

[0014] Optionally, the second inlet pipe and the second outlet pipe are substantially coaxially arranged.

[0015] Optionally, the first inlet pipe and the second inlet pipe are substantially parallel to each other.

[0016] Optionally, the second outlet pipe and the second outlet pipe are substantially parallel to each other.

[0017] Optionally, the valve body includes a columnar main body, a valve cover and a valve stem. The columnar main body defines a groove, and the groove cooperates with the valve cover to form part of the second channel;

[0018] Optionally, the groove is an arc-shaped groove, and the arc-shaped groove is arranged around the axis of the valve stem;

[0019] Optionally, the valve stem is configured to be movable between an open position and a closed position to open and close the first channel.

[0020] Optionally, the outer diameters of the four pipes are substantially the same, and along the axial direction of the columnar main body, the outer diameter of the pipe is greater than half of the height of the columnar main body.

[0021] On the other hand, the present invention also provides a control valve for controlling fluid transmission, including

[0022] A valve body that defines two relatively independent first channels and second channels, and the control valve is configured to control the opening / closing of one of the two channels, namely the first channel and the second channel;

[0023] A first inlet and a first outlet that are in fluid communication with the first channel, and

[0024] A second inlet and a second outlet that are in fluid communication with the second channel,

[0025] wherein the first channel and the second channel are arranged in a cross manner.

[0026] Optionally, the first inlet, the first outlet, the second inlet and the second outlet are substantially at the same height.

[0027] Optionally, the control valve further includes four pipes, namely:

[0028] A first inlet pipe extending along the first inlet and a first outlet pipe extending along the first outlet; and

[0029] A second inlet pipe extending along the second inlet and a second outlet pipe extending along the second outlet;

[0030] Optionally, the first inlet pipe and the second outlet pipe are substantially coaxially arranged;

[0031] Optionally, the second inlet pipe and the first outlet pipe are substantially coaxially arranged.

[0032] Optionally, the first inlet pipe and the second inlet pipe are substantially parallel to each other.

[0033] Optionally, the second outlet pipe and the second outlet pipe are substantially parallel to each other.

[0034] Optionally, the valve body includes a columnar main body, a valve cover and a valve stem. The columnar main body defines a groove, and the groove cooperates with the valve cover to form part of the second channel;

[0035] The groove is an arc-shaped groove, and the arc-shaped groove is arranged around the axis of the valve stem;

[0036] Optionally, along the axial direction of the valve stem, the columnar main body has opposite first and second ends. The first inlet, the first outlet, the second inlet and the second outlet are arranged at the first end, and the arc-shaped groove is arranged at the second end;

[0037] Optionally, the bottom wall of the groove is higher than the second inlet and the second outlet;

[0038] Optionally, the valve stem is configured to be movable between an open position and a closed position to open and close the first channel;

[0039] Optionally, the outer diameters of the four pipes are substantially the same, and along the axial direction of the columnar main body, the outer diameter of the pipe is greater than half of the height of the columnar main body.

[0040] Optionally, a stop member is provided at the outlet end of the second outlet pipe. The stop member is configured to conduct the second outlet pipe and the conveying pipe when the second outlet pipe is connected to the conveying pipe; and to close the second outlet pipe when the second outlet pipe is not connected to the conveying pipe.

[0041] In another aspect, the present invention also provides a surface cleaning device, including a cleaning liquid supply system and a dirt recovery system,

[0042] The cleaning liquid supply system includes a fluid dispenser for supplying cleaning liquid to a surface to be cleaned and a fluid delivery path located downstream of the fluid dispenser. At least a part of the fluid delivery path includes a supply pipeline and a self-cleaning pipeline arranged in parallel. The supply pipeline is used to provide cleaning liquid to the surface to be cleaned, and the self-cleaning pipeline is used to provide cleaning liquid to the air flow path of the dirt recovery system. Wherein, the above control valve is included in the fluid delivery path.

[0043] The control valve provided by the present invention is used to control fluid transmission. The control valve includes a valve body defining two relatively independent first channels and second channels. The control valve is configured to be able to control the opening / closing of the first channel or the second channel. A first inlet and a first outlet fluidly connected to the first channel, and a second inlet and a second outlet fluidly connected to the second channel. Wherein, the first inlet, the first outlet, the second inlet and the second outlet are substantially at the same height. It can effectively reduce the height of the control valve, thereby reducing the installation space of the control valve, and at the same time making its installation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0045] Figure 1 It is a schematic structural diagram of a wet cleaning device according to an embodiment;

[0046] Figure 2 For Figure 1 A sectional view at a certain angle of the downstream part of the middle hose of the shown wet cleaning device;

[0047] Figure 3 For Figure 1 Another sectional view at a certain angle of the downstream part of the middle hose of the shown wet cleaning device;

[0048] Figure 4 It is a schematic sectional structure diagram of a part of the fluid delivery path;

[0049] Figure 5 It is an exploded view of the structure of the control valve;

[0050] Figure 6 It is a schematic diagram showing the supply channel in the control valve;

[0051] Figure 7 It is a schematic diagram showing the self-cleaning channel in the control valve;

[0052] Figure 8 It is a schematic cross-sectional view of a control valve;

[0053] Figure 9 It is a schematic diagram showing the first channel in the control valve;

[0054] Figure 10 It is a schematic diagram showing the second channel in the control valve;

[0055] Figure 11 It is a schematic cross-sectional structure view of the control valve in another embodiment;

[0056] Figure 12 It is a schematic cross-sectional structure view of the control valve from another angle;

[0057] Figure 13 It is a schematic structure view when the first channel in the control valve is closed;

[0058] Figure 14 It is a schematic structure view when the first channel of a control valve is opened;

[0059] Figure 15 It is a schematic structure view of the control valve in yet another embodiment. Embodiment

[0060] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0061] It should be noted that if there are directional indications involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0062] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0063] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.

[0064] In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0065] Such as Figure 1-7As shown, where the arrow direction in the figure is the fluid flow direction, this embodiment discloses a wet cleaning device 100, including a cleaning liquid supply system and a dirt recovery system. The cleaning liquid supply system includes a fluid dispenser for supplying cleaning liquid to the surface to be cleaned and a fluid delivery path 1 located downstream of the fluid dispenser. Generally, the fluid dispenser can be a water pump. Of course, the fluid dispenser can also be other structures that can achieve the distribution function, not limited to electric or manual. In this embodiment, the fluid dispenser is an electromagnetic pump, and the electromagnetic pump is installed in the water pump accommodation cavity defined by the housing. At least part of the fluid delivery path 1 includes two juxtaposed supply pipelines 11 and a self-cleaning pipeline 12. The supply pipeline 11 is used to supply cleaning liquid to the surface to be cleaned, and the self-cleaning pipeline 12 is used to supply cleaning liquid to the air flow path of the dirt recovery system. Among them, the supply pipeline 11 and the self-cleaning pipeline 12 are in fluid communication with the fluid dispenser through a tee 5. In order to control the supply pipeline 11 and the self-cleaning pipeline 12, the fluid delivery path further includes two control valves 2, namely a first control valve 201 and a second control valve 202. The supply fluid flowing in from the supply inlet 111 of the supply pipeline 11 flows through the first control valve 201 and the second control valve 202 in sequence and then reaches the supply outlet 112 of the supply pipeline 11. The self-cleaning fluid flowing in from the self-cleaning inlet 121 of the self-cleaning pipeline 12 flows through the first control valve 201 and the second control valve 202 in sequence and then reaches the self-cleaning outlet 122 of the self-cleaning pipeline 12. The first control valve 201 is configured to control the opening / closing of one of the two pipelines of the supply pipeline 11 and the self-cleaning pipeline 12, and the second control valve 202 is configured to control the opening / closing of the other pipeline of the supply pipeline 11 and the self-cleaning pipeline 12.

[0066] In order to ensure the same water output, generally, pipes with the same diameter need to be used. If the solution disclosed in the patent CN209750919U is adopted, a single-channel plunger valve is used for each of the supply pipeline 11 and the self-cleaning pipeline 12, which will increase the space for accommodating the valves. In order to ensure the air intake effect, the volume of the entire accessory 4 needs to be increased; if the volume of the entire accessory 4 is to remain unchanged, then the space used for the air duct needs to be reduced, affecting the air intake effect. At the same time, due to the use of single-channel valves, the installation of the pipes in the other channel will also be restricted, making the entire installation more complicated. Therefore, in this solution, integrating the supply pipeline 11 and the self-cleaning pipeline 12 onto one control valve 2 can effectively reduce the occupied volume of the pipeline and the valve, and ensure the suction efficiency of the suction channel 41 without increasing the diameter of the accessory 4 or the volume of the equipment. Further, since both pipes are fixed by the valve, the installation is more convenient.

[0067] The dirt collection system includes a sewage tank for collecting dirt, a blower for generating an air flow, and a suction pipe. The suction pipe includes an air inlet and an air outlet. The air outlet is communicated with the blower air inlet of the blower. The air inlet can be connected to accessory 4, or can be directly used to clean the surface to be cleaned. There can be fluid communication between accessory 4 and the air inlet through extension pipe 3. Extension pipe 3 can be one or a combination of a flexible hose 34, a rigid pipe, a shrinkable pipe, or a collapsible pipe, which is not specifically limited here.

[0068] Extension pipe 3 defines an extension channel, having a fluid inlet end 31 and a fluid outlet end 32 along the flow direction of the suction air flow. The fluid outlet end 32 is in fluid communication with the suction pipe of the dirt collection system; accessory 4 is detachably connected to the fluid inlet end 31 of extension pipe 3. Accessory 4 defines a suction channel 41 and a receiving space 42 for accommodating the self-cleaning part. The control valve 2 and the pipeline can be arranged in the receiving space 42. The suction channel 41 and the receiving space 42 are relatively independent.

[0069] In one embodiment, the first control valve 201 is arranged inside extension pipe 3; the second control valve 202 is arranged inside accessory 4. The first control valve 201 can control the opening / closing of the supply pipeline 11. Correspondingly, the second control valve 202 can control the opening / closing of the self-cleaning pipeline 12. During normal operation, when the user uses accessory 4, the part held needs to maintain a certain distance from the front end of accessory 4, which is more ergonomic and more labor-saving to use. Therefore, the first control valve 201 is arranged upstream of the second control valve 202. When performing the self-cleaning operation, the user does not need to exert force, so the second control valve 202 can be arranged closer to the front end of accessory 4.

[0070] In another embodiment, both the first control valve 201 and the second control valve 202 can be arranged inside extension pipe 3. Accessory 4 is detachably connected to extension pipe 3. With this design, when there are multiple accessories 4 in the product, it is not necessary to arrange the control valve 2 in each accessory 4. Just connect the pipeline in accessory 4 to the pipeline in extension pipe 3 (generally, when accessory 4 is connected to extension pipe 3, the pipelines are connected together). This setting can effectively reduce costs, and each accessory 4 can achieve the self-cleaning function.

[0071] Of course, in other embodiments, both the first control valve 201 and the second control valve 202 are arranged inside accessory 4.

[0072] Refer to Figures 5-7 and at the same time, it is also possible to refer to Figures 1-4, the control valve 2 includes a valve body 20. A relatively independent supply channel 203 and a self-cleaning channel 204 are defined within the valve body 20. The supply channel 203 and the self-cleaning channel 204 are arranged in a crosswise manner. Further, the control valve 2 further includes a supply inlet pipe 205 and a supply outlet pipe 206 that are in fluid communication with the supply channel 203, and a self-cleaning inlet pipe 07 and a self-cleaning outlet pipe 208 that are in fluid communication with the self-cleaning channel 204. The supply inlet pipe 205, the supply outlet pipe 206, the self-cleaning inlet pipe 07, and the self-cleaning outlet pipe 208 are substantially at the same height. With such an arrangement, the height of the entire control valve 2 can be further effectively reduced, its installation space can be decreased, and the suction channel 41 can be maximized without increasing the volume of the accessory 4.

[0073] In one embodiment, the extension pipe 3 includes a connecting portion 33 and a hose 34. The connecting portion 33 is generally composed of a rigid material, and part of the fluid delivery path 1 is provided within the hose 34, making the entire product more aesthetically pleasing. Along the axial direction of the hose 34, the hose 34 can rotate relative to the connecting portion 33. This arrangement can ensure that when the user rotates the accessory 4 during use, the hose 34 does not rotate, making it more convenient to use. Further, to prevent the fluid delivery path 1 within the hose 34 from being deformed due to excessive rotation of the accessory 4, resulting in pipeline blockage, the rotation angle between the connecting portion 33 and the hose 34 is less than 360 degrees.

[0074] Please refer to Figures 8 to 14 , and reference can also be made to Figure 5 , wherein the direction indicated by the arrow is the fluid flow direction. In the embodiment shown in the figure, the control valve 2 for controlling fluid transmission includes a valve body 20, which defines two relatively independent first channels 21 and second channels 22. The valve body 20 further includes a first inlet 211 and a first outlet 212 that are in fluid communication with the first channel 21. Fluid flows into the first channel 21 from the first inlet 211 and then flows out from the first outlet 212. At the same time, the valve body 20 further includes a second inlet 221 and a second outlet 222 that are in fluid communication with the second channel 22. Fluid flows into the second channel 22 from the second inlet 221 and then flows out from the second outlet 222. The control valve 2 is configured to control the opening / closing of one of the two channels, the first channel 21 and the second channel 22. The other channel is a normally open channel. The first channel 21 and the second channel 22 are arranged in a crosswise manner. The crosswise arrangement described here means that the projections of the first channel 21 and the second channel 22 on a certain plane have an intersection point. It can also be understood that assuming a plane that can divide the control valve 2 into two halves, wherein the first inlet 211 and the second outlet 222 are on one side of the plane, while the first outlet 212 and the second inlet 221 are on the other side of the plane. Arranging the two channels on the same valve body 20 can not only save the installation space of the control valve 2 but also make the installation of the entire pipeline more convenient.

[0075] In a specific embodiment (refer to Figures 8-14 ), the valve body 20 includes a columnar main body 23, a valve cover 24, and a valve stem 25. The valve stem 25 is slidably received in the valve body 20. First water stop members 251 and second water stop members 252 are respectively provided at both ends of the valve stem 25. A fluid passage 253 (part of the second passage 22) is defined between the first water stop member 251 and the second water stop member 252. The valve stem 25 is configured to be movable between an open position (refer to Figure 14 ) and a closed position (refer to Figure 13 ) to open and close the first passage 21. A pressing key 26 is provided at one end of the valve stem 25. The user can control the opening and closing of the second passage 22 by pressing the pressing key 26. An elastic member 27 is provided between the key and the columnar main body 23. The valve stem 25 is reset by relying on the elastic force of the elastic member 27 to achieve the normally closed state of the first passage 21. Specifically, a guiding column 28 is provided at one end of the columnar main body 23 close to the key. A spring is provided outside the guiding column 28 to reset the valve stem 25. In one embodiment, the second water stop member 252 is provided close to the pressing key 26, the first water stop member 251 is provided away from the pressing key 26, and a second sealing ring 254 is provided between the second water stop member 252 and the pressing key 26. The second sealing ring 254 is installed on the valve stem 25. The second sealing ring 254 always remains sealed with the valve body 20 during the movement of the valve stem 25 to prevent fluid from leaking from the first passage 21 (when the guiding column 28 is a hollow structure and communicates with the first passage 21 of the valve body 20, the second sealing ring 254 remains sealed with the inside of the guiding column 28). A first sealing ring 255 is provided between the first water stop member 251 and the second water stop member 252. The first sealing ring 255 is provided in the fluid passage 253. When the first water stop member 251 abuts against the first sealing ring 255, a seal is formed between the first water stop member 251 and the first sealing ring 255, thereby truncating the fluid passage 253 and closing the first passage 21. When the first water stop member 251 moves away from the first sealing ring 255, the first passage 21 is opened. In other alternative embodiments, the second sealing ring 254 can be provided on the valve stem 25, and the opening and closing of the first passage 21 are achieved as the valve stem 25 moves.

[0076] The columnar main body 23 defines a groove 231 (refer to Figures 11-14 ). Both ends of the groove 231 are respectively in fluid communication with the second inlet 221 and the second outlet 222. The groove 231 and the valve cover 24 cooperate to form part of the second passage 22; since the valve stem 25 is a columnar structure, in order to cooperate with the valve stem 25 and make the entire valve body 20 structure more compact, the groove 231 is an arc-shaped groove 231, and the arc-shaped groove 231 is arranged around the axis of the valve stem 25; when the valve cover 24 is combined with the columnar main body 23, the groove 231 is sealed. At this time, the second passage 22 is formed inside the valve body 20.

[0077] Refer toFigure 11 , in conjunction with other attached drawings, along the axial direction of the valve stem 25, the columnar main body 23 has opposite first end 233 and second end 234. The first inlet 211, the first outlet 212, the second inlet 221 and the second outlet 222 are arranged near the first end 233, and the arc-shaped groove 231 is arranged near the second end 234. In this way, when the first inlet 211, the first outlet 212, the second inlet 221 and the second outlet 222 are basically at the same height, two channels can be made independent of each other and cross each other. Specifically, the same height can be understood as that along the height direction of the valve body 20, the first inlet 211, the first outlet 212, the second inlet 221 and the second outlet 222 are basically at the same height. It can also be understood that when the control valve 2 is a plunger valve, along the axial direction of the valve body 20, the first inlet 211, the first outlet 212, the second inlet 221 and the second outlet 222 are basically at the same height. Of course, the above description does not limit the type of the control valve 2, but only facilitates the understanding of this solution. The control valve 2 can also be other types of valves, such as globe valves, etc.

[0078] Furthermore, the bottom wall 232 of the groove 231 is higher than the second inlet 221 and the second outlet 222. While realizing the crossing of the two channels, it does not affect the flow rate of the control valve. At the same time, the first inlet 211, the first outlet 212, the second inlet 221 and the second outlet 222 are basically at the same height. It can effectively reduce the height of the entire valve body 20 and reduce the space occupied by the control valve 2.

[0079] In one embodiment (refer to Figure 11 ), along the axial direction of the columnar main body 23, the outer diameter of the pipeline is greater than half of the height of the columnar main body 23. In this way, without reducing the radius of the pipeline, the height of the entire valve body 20 can be effectively reduced, thereby reducing the space occupied by the control valve 2.

[0080] Continue to refer to Figures 8-14 , the control valve 2 further includes a first inlet pipeline 213 extending along the first inlet 211 and a first outlet pipeline 214 extending along the first outlet 212; and a second inlet pipeline 223 extending along the second inlet 221 and a second outlet pipeline 224 extending along the second outlet 222. In one embodiment, the first inlet pipeline 213 and the second outlet pipeline 224 are basically coaxially arranged; in another embodiment, the first inlet pipeline 213 and the second outlet pipeline 224 are basically coaxially arranged, and the second inlet pipeline 223 and the first outlet pipeline 214 are basically coaxially arranged.

[0081] Further, to better install the control valve 2 into the installation space, the first inlet pipe 213 and the second inlet pipe 223 are arranged substantially parallel. Optionally, the first outlet pipe 214 and the second outlet pipe 224 are arranged substantially parallel. In this way, the whole control valve is in a long strip shape and has a lower height compared with a general plunger valve, making it more suitable for installation in the accessory to ensure the maximization of the suction channel in the accessory.

[0082] Since the second channel 22 is a normally open channel, to control the second outlet pipe 224, a stop member is provided at the outlet end of the second outlet pipe 224. The stop member is configured to conduct the second outlet pipe 224 and the delivery pipe when the second outlet pipe 224 is connected to the delivery pipe; and to close the second outlet pipe 224 when the second outlet pipe 224 is not connected to the delivery pipe.

[0083] Reference Figure 15 , where the direction indicated by the arrow is the fluid flow direction. In another embodiment, the control valve 2 for controlling fluid transmission includes a valve body 20, which defines two relatively independent first channels and second channels. Figure 15 The control valve in the illustrated embodiment is Figures 8-14 The only difference from the control valve in the illustrated embodiment is that the first channel and the second channel in this embodiment are not arranged in a cross manner, and the structures in other valves can be referred to Figures 8-14 the structure in the illustrated embodiment (with the same reference numerals). At both ends of the first channel, a first inlet 211 and a first outlet 212 that are in fluid communication with the first channel are provided. Fluid flows into the first channel from the first inlet 211 and then flows out from the first outlet 212. At both ends of the second channel, a second inlet 221 and a second outlet 222 that are in fluid communication with the second channel are provided. Fluid flows into the second channel from the second inlet 221 and then flows out from the second outlet 222. The control valve 2 is configured to control the opening / closing of one of the two channels, i.e., the first channel and the second channel. At the same time, the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 are substantially at the same height. This can effectively reduce the height of the whole valve body 20 and the space occupied by the control valve 2. Specifically, the same height can be understood as that the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 are substantially at the same height along the height direction of the valve body 20. It can also be understood that when the control valve 2 is a plunger valve, the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 are substantially at the same height along the axis direction of the valve body 20. Of course, the above description does not limit the type of the control valve 2, but is only for facilitating the understanding of this solution. The control valve 2 can also be other types of valves, such as a globe valve, etc.

[0084] In a specific embodiment, the valve body 20 includes a columnar main body 23, a valve cover 24, and a valve stem 25. The valve stem 25 is slidably received in the valve body 20. First water stop members 251 and second water stop members 252 are respectively provided at both ends of the valve stem 25. A fluid passage 253 (partial second passage) is defined between the first water stop member 251 and the second water stop member 252. The valve stem 25 is configured to be movable between an open position and a closed position to open and close the first passage. A pressing key 26 is provided at one end of the valve stem 25. The user can control the opening and closing of the second passage through the pressing key 26. An elastic member 27 is provided between the pressing key and the columnar main body 23. The valve stem 25 is reset by relying on the elastic force of the elastic member 27 to achieve normally closed of the first passage. Specifically, a guiding column 28 is provided at one end of the columnar main body 23 close to the pressing key, and a spring is provided outside the guiding column 28. In one embodiment, the second water stop member 252 is provided close to the pressing key 26, the first water stop member 251 is provided away from the pressing key 26, and a second sealing ring 254 is provided between the second water stop member 252 and the pressing key 26. The second sealing ring 254 is mounted on the valve stem 25. The second sealing ring 254 always remains sealed with the valve body 20 during the movement of the valve stem 25 to prevent fluid from leaking from the first passage (when the guiding column 28 is a hollow structure and is in fluid communication with the first passage of the valve body 20, the second sealing ring 254 remains sealed with the inside of the guiding column 28). A first sealing ring 255 is provided between the first water stop member 251 and the second water stop member 252. The first sealing ring 255 is provided in the fluid passage 253. When the first water stop member 251 abuts against the first sealing ring 255, a seal is formed between the first water stop member 251 and the first sealing ring 255, thereby truncating the fluid passage 253 and closing the first passage. When the first water stop member 251 moves away from the first sealing ring 255, the first passage is opened. In other alternative embodiments, the second sealing ring 254 can be provided on the valve stem 25, and with the movement of the valve stem 25, the opening and closing of the first passage are achieved.

[0085] The columnar main body 23 defines a groove 231. The groove 231 is in fluid communication with a second inlet 221 and a second outlet 222. The groove 231 and the valve cover 24 cooperate to form a partial second passage. Since the valve stem 25 is a columnar structure, in order to cooperate with the valve stem 25 and make the entire valve body 20 structure more compact, the groove 231 is an arc-shaped groove 231, and the arc-shaped groove 231 is arranged around the axis of the valve stem 25. When the valve cover 24 is combined with the columnar main body 23, the groove 231 is sealed. At this time, a second passage is formed in the valve body 20.

[0086] In one embodiment, the outer diameter of the pipe in the axial direction of the columnar main body 23 is greater than half of the height of the columnar main body 23. In this way, without reducing the radius of the pipe, the height of the entire valve body 20 is effectively reduced, thereby reducing the space occupied by the control valve 2.

[0087] The control valve 2 further includes a first inlet pipe 213 extending along the first inlet 211 and a first outlet pipe 214 extending along the first outlet 212; and a second inlet pipe 223 extending along the second inlet 221 and a second outlet pipe 224 extending along the second outlet 222. In one embodiment, the first inlet pipe 213 and the first outlet pipe 214 are substantially coaxially arranged; in another embodiment, the first inlet pipe 213 and the first outlet pipe 214 are substantially coaxially arranged, and the second inlet pipe 223 and the second outlet pipe 224 are substantially coaxially arranged.

[0088] Further, in order to better install the control valve 2 into the installation space, the first inlet pipe 213 and the second inlet pipe 223 are substantially parallel to each other. Optionally, the second outlet pipe 224 and the second outlet pipe 224 are substantially parallel to each other. In this way, the entire control valve 2 is equivalent to including two parallel pipes, which can effectively save space and make the installation more convenient.

[0089] Since the second channel is a normally open channel, in order to control the second outlet pipe 224, a shut-off member is provided at the outlet end of the second outlet pipe 224. The shut-off member is configured to conduct the second outlet pipe 224 and the delivery pipe when the second outlet pipe 224 is connected to the delivery pipe; and to close the second outlet pipe 224 when the second outlet pipe 224 is not connected to the delivery pipe.

[0090] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structures made by using the description and drawings of the present invention, or directly or indirectly applied to other related technical fields, are equally included in the patent protection scope of the present invention.

Claims

1. A wet cleaning device, comprising a cleaning liquid supply system and a dirt recovery system, characterized in that the cleaning liquid supply system includes a fluid dispenser for supplying cleaning liquid to a surface to be cleaned and a fluid delivery path downstream of the fluid dispenser. At least a part of the fluid delivery path includes a supply pipe and a self-cleaning pipe arranged side by side. The supply pipe is used to provide cleaning liquid to the surface to be cleaned, and the self-cleaning pipe is used to provide cleaning liquid to an air flow path of the dirt recovery system; the fluid delivery path further includes two control valves, namely a first control valve and a second control valve. The control valve is a valve body defining two relatively independent supply channels and self-cleaning channels. The control valve is configured to control the opening / closing of the supply channel or the self-cleaning channel; the supply channel and the self-cleaning channel can be simultaneously conducted, and one of the supply channel and the self-cleaning channel is in a normally open state, and the other can be controlled by the control valve; the supply fluid flowing in from the supply inlet of the supply pipe sequentially flows through the supply channels of the first control valve and the supply channels of the second control valve and then reaches the supply outlet of the supply pipe; the self-cleaning fluid flowing in from the self-cleaning inlet of the self-cleaning pipe sequentially flows through the self-cleaning channels of the first control valve and the self-cleaning channels of the second control valve and then reaches the self-cleaning outlet of the self-cleaning pipe; the first control valve is configured to control the opening / closing of one of the two channels of the supply channel and the self-cleaning channel, and the second control valve is configured to control the opening / closing of the other of the two pipes of the supply pipe and the self-cleaning pipe; the supply channel and the self-cleaning channel are arranged in a cross manner.

2. The wet cleaning device according to claim 1, wherein, It further includes an extension pipe which defines an extension channel and has a fluid inlet end and a fluid outlet end along the flow direction of the suction air flow. The fluid outlet end is in fluid communication with a suction pipe of the dirt recovery system; an accessory detachably connected to the fluid inlet end of the extension pipe.

3. The wet cleaning device according to claim 2, characterized in that the first control valve is arranged inside the extension pipe; the second control valve is arranged inside the accessory.

4. The wet cleaning device according to claim 2, characterized in that both the first control valve and the second control valve are arranged inside the extension pipe.

5. The wet cleaning device according to claim 2, characterized in that both the first control valve and the second control valve are arranged inside the accessory.

6. The wet cleaning device according to claim 1, characterized in that the control valve further includes: a supply inlet pipe and a supply outlet pipe fluidly connected to the supply channel, and a self-cleaning inlet pipe and a self-cleaning outlet pipe fluidly connected to the self-cleaning channel.

7. The wet cleaning device according to claim 6, characterized in that the supply inlet pipe, the supply outlet pipe, the self-cleaning inlet pipe and the self-cleaning outlet pipe are substantially at the same height.

8. The wet cleaning device according to claim 2, characterized in that The extension tube includes a connecting portion and a flexible hose, and part of the fluid delivery path is disposed within the flexible hose. The flexible hose can rotate relative to the connecting portion along its axial direction.

9. The wet cleaning device according to claim 8, wherein the rotation angle between the connecting portion and the flexible hose is less than 360 degrees.

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