CN116116834A

CN116116834A - Control valve and surface cleaning device

Info

Publication number: CN116116834A
Application number: CN202310193262.3A
Authority: CN
Inventors: 余贾荣
Original assignee: Suzhou Simple Youwei Technology Co Ltd
Current assignee: Suzhou Simple Youwei Technology Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2023-05-16
Also published as: CN113020143B; CN116851367A; CN113020143A

Abstract

The invention discloses a control valve for controlling fluid delivery. The control valve includes a valve body defining two relatively independent first and second passages, and is configured to control opening/closing of the first passage or the second passage. A first inlet and a first outlet in fluid communication with the first channel, and a second inlet and a second outlet in fluid communication with the second channel. Wherein the first inlet, the first outlet, the second inlet and the second outlet are substantially within the same height. The height of the control valve can be effectively reduced, so that the installation space of the control valve is reduced, and the control valve is more convenient to install.

Description

Control valve and surface cleaning device

The present application is a divisional application of the invention patent application with the application date 2021, 03, 22, 202110303093.5 and the name of "control valve and surface cleaning device".

Technical Field

The invention relates to the technical field of cleaning, in particular to a control valve and a surface cleaning device.

Background

The plunger valve consists of a valve body, a valve cover, a valve rod, a plunger, kong Jia, a sealing ring, and the like. In the operation process, the valve rod drives the plunger to reciprocate up and down in the middle of the hole frame to finish the opening and closing functions of the valve. The plunger and the sealing ring are in interference fit in the valve, so that the lateral force generated by the compression of the sealing ring is sealed with the middle hole surface of the valve body and the outer circle of the plunger, the tightness of the valve is ensured, the internal leakage and the external leakage are stopped, and the valve can be rapidly opened and closed. The plunger valve is compared with the stop valve, the service life is long, the operation is labor-saving, but the adjusting stroke is longer than that of the stop valve, so that the height is higher, the occupied space is larger, and the installation space is required during use. When the installation space is small, it is not suitable to install the plunger valve.

Disclosure of Invention

In order to solve the above technical problems, a main object of the present invention is to provide a control valve, which aims to reduce the installation height of a plunger valve, so that the control valve can be suitable for more installation scenes.

In order to achieve the above object, the present invention proposes a control valve for controlling fluid transmission, comprising:

a valve body defining two relatively independent first and second passages, the control valve being configured to control opening/closing of the first passage or the second passage;

a first inlet and a first outlet in fluid communication with the first channel, and

a second inlet and a second outlet in fluid communication with the second channel,

wherein the first inlet, the first outlet, the second inlet and the second outlet are substantially within the same height.

Optionally, the control valve further includes four pipes, respectively:

a first inlet duct extending along the first inlet and a first outlet duct extending along the first outlet; and

a second inlet duct extending along the second inlet and a second outlet duct extending along the second outlet;

optionally, the first inlet duct and the first outlet duct are arranged substantially coaxially;

optionally, the second inlet duct and the second outlet duct are arranged substantially coaxially.

Optionally, the first inlet duct and the second inlet duct are arranged substantially in parallel.

Optionally, the second outlet duct and the second outlet duct are arranged substantially in parallel.

Optionally, the valve body includes a cylindrical body, a valve cap and a valve stem, the cylindrical body defining a recess, the recess cooperating with the valve cap to form part of the second passage;

optionally, the groove is an arc groove, and the arc groove is arranged around the axis of the valve rod;

optionally, the valve stem is configured to be movable between an open position and a closed position to open and close the first passageway.

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

In another aspect, the present invention also provides a control valve for controlling fluid delivery, comprising

A valve body defining two relatively independent first and second passages, the control valve being configured to control opening/closing of one of the first and second passages;

wherein the first channel and the second channel are arranged in a crossing manner.

Optionally, the first inlet, the first outlet, the second inlet and the second outlet are substantially within the same height.

Optionally, the control valve further includes four pipes, respectively:

optionally, the first inlet duct and the second outlet duct are arranged substantially coaxially;

optionally, the second inlet duct and the first outlet duct are arranged substantially coaxially.

the groove is an arc-shaped groove which is arranged around the axis of the valve rod;

optionally, along the axial direction of the valve rod, the columnar main body has a first end and a second end which are opposite, 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;

optionally, the bottom wall of the recess is higher than the second inlet and the second outlet;

optionally, the valve stem is configured to be movable between an open position and a closed position to open and close the first passageway;

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

Optionally, the outlet end of the second outlet conduit is provided with a stop configured to open the second outlet conduit and the delivery conduit when the second outlet conduit is in communication with the delivery conduit; and closing the second outlet pipeline when the second outlet pipeline is not communicated with the conveying pipeline.

In yet another aspect, the present invention provides a surface cleaning apparatus comprising a cleaning solution supply system and a soil recycling system,

the cleaning liquid supply system comprises a fluid distributor for supplying cleaning liquid to a surface to be cleaned and a fluid conveying path positioned downstream of the fluid distributor, at least part of the fluid conveying path comprises a supply pipeline and a self-cleaning pipeline which are mutually parallel, the supply pipeline is used for supplying the cleaning liquid to the surface to be cleaned, and the self-cleaning pipeline is used for supplying the cleaning liquid to an airflow path of the dirt recovery system; wherein the fluid conveying path comprises the control valve.

The control valve provided by the invention is used for controlling fluid transmission, and comprises a valve body which is defined with two relatively independent first channels and second channels, wherein the control valve is configured to control the opening/closing of the first channels or the second channels. A first inlet and a first outlet in fluid communication with the first channel, and a second inlet and a second outlet in fluid communication with the second channel. Wherein the first inlet, the first outlet, the second inlet and the second outlet are substantially within the same height. The height of the control valve can be effectively reduced, so that the installation space of the control valve is reduced, and the control valve is more convenient to install.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a wet cleaning apparatus according to an embodiment;

FIG. 2 is an angular cross-sectional view of a downstream portion of a middle hose of the wet cleaning apparatus of FIG. 1;

FIG. 3 is another angular cross-sectional view of a downstream portion of a middle hose of the wet cleaning apparatus of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a portion of a fluid delivery path;

FIG. 5 is an exploded view of the control valve;

FIG. 6 is a schematic diagram of a supply passage embodied in a control valve;

FIG. 7 is a schematic diagram of a self-cleaning channel embodied in a control valve;

FIG. 8 is a schematic cross-sectional view of a control valve;

FIG. 9 is a schematic diagram of a first passage embodied in a control valve;

FIG. 10 is a schematic diagram of a second passage embodied in a control valve;

FIG. 11 is a schematic cross-sectional view of a control valve according to another embodiment;

FIG. 12 is a schematic view of a cross-sectional structure of another angle of the control valve;

FIG. 13 is a schematic view of the first passage of the control valve when closed;

FIG. 14 is a schematic view of a first passage of a control valve when open;

fig. 15 is a schematic structural view of a control valve of yet another embodiment.

Description of the embodiments

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

In the case where a directional instruction is involved in the embodiment of the present invention, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

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

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application can be understood by those of ordinary skill in the art in a specific context.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

As shown in fig. 1-7, in which the arrow direction in the drawing is the fluid flow direction, the present embodiment discloses a wet cleaning apparatus 100 including a cleaning liquid supply system and a dirt recovery system. The cleaning liquid supply system comprises a fluid dispenser for supplying cleaning liquid to the surface to be cleaned, which may be a water pump in general, and a fluid transport path 1 located downstream of the fluid dispenser, but of course the fluid dispenser may be other structures that can perform a dispensing function, not limited to electric or manual. In this embodiment, the fluid dispenser is an electromagnetic pump, and the electromagnetic pump is mounted in a water pump accommodating cavity defined by the housing. At least part of the fluid delivery path 1 comprises two mutually juxtaposed supply lines 11, the supply lines 11 being adapted to supply cleaning liquid to the surface to be cleaned, and a self-cleaning line 12, the self-cleaning line 12 being adapted to supply cleaning liquid to the air flow path of the dirt recovery system. Wherein the supply line 11 and the self-cleaning line 12 are in fluid communication with the fluid dispenser via a tee 5. In order to control the supply line 11 and the self-cleaning line 12, wherein the fluid transfer path further comprises two control valves 2, namely a first control valve 201 and a second control valve 202, respectively, the supply fluid flowing in from the supply inlet 111 of the supply line 11 flows through the first control valve 201 and the second control valve 202 in sequence and reaches the supply outlet 112 of the supply line 11, and the self-cleaning fluid flowing in from the self-cleaning inlet 121 of the self-cleaning line 12 flows through the first control valve 201 and the second control valve 202 in sequence and reaches the self-cleaning outlet 122 of the self-cleaning line 12; the first control valve 201 is configured to control opening/closing of one of the two of the supply line 11 and the self-cleaning line 12, and the second control valve 202 is configured to control opening/closing of the other of the two of the supply line 11 and the self-cleaning line 12.

In order to ensure the same water yield, a pipeline with the same pipe diameter is generally required, if a scheme disclosed in the CN209750919U patent is adopted, a single-channel plunger valve is respectively used for the supply pipeline 11 and the self-cleaning pipeline 12, the space for accommodating the valve is increased, and in order to ensure the air inlet effect, the volume of the whole accessory 4 is increased; if the volume of the whole accessory 4 is not changed, the space used by the air duct needs to be reduced, and the air inlet effect is affected. Meanwhile, the single-channel valve is adopted, so that the pipeline installation of the other channel is limited, and the whole installation is more complex. Therefore, in the present solution, the supply line 11 and the self-cleaning line 12 are integrated to one control valve 2, which can effectively reduce the occupied volume of the lines and valves, and ensure the suction efficiency of the suction channel 41 without increasing the diameter of the accessory 4 or the volume of the device. Furthermore, as the two pipelines are fixed by the valve, the installation is more convenient.

The dirt recovery system includes a sewage tank for recovering dirt, a blower for generating an airflow, and a suction duct. The suction duct comprises an air inlet and an air outlet, the air outlet being in communication with a fan inlet of the fan, the air inlet being connectable to the accessory 4 or being directly usable for cleaning a surface to be cleaned. The accessory 4 and the air inlet may be in fluid communication via an extension tube 3, and the extension tube 3 may be one or a combination of several of a hose 34, a rigid tube, a shrink tube or a folded tube, which are not limited in detail herein.

The extension pipe 3 defines an extension channel having a fluid inlet end 31 and a fluid outlet end 32 in the flow direction of the suction airstream, the fluid outlet end 32 being in fluid communication with the suction duct of the dirt recovery system; the attachment 4 is detachably connected to the fluid inlet end 31 of the extension tube 3. The accessory 4 defines a suction channel 41 and a receiving space 42 for receiving the self-cleaning portion, and the control valve 2 and the line may be arranged in the receiving space 42, the suction channel 41 and the receiving space 42 being relatively independent.

In one embodiment, the first control valve 201 is disposed inside the extension pipe 3; the second control valve 202 is arranged inside the accessory 4. The first control valve 201 can control the opening/closing of the supply line 11, and correspondingly, the second control valve 202 can control the opening/closing of the self-cleaning line 12, and during normal operation, the user needs to keep a certain distance from the front end of the accessory 4 when using the accessory 4, so that the first control valve 201 is more ergonomic and more labor-saving to use, and is arranged upstream of the second control valve 202. While the user does not need to exert effort when performing the self-cleaning operation, the second control valve 202 may be arranged relatively close to the front end of the accessory 4.

In another embodiment, the first control valve 201 and the second control valve 202 may be disposed inside the extension pipe 3, and the accessory 4 may be detachably connected to the extension pipe 3, so that when a product contains a plurality of accessories 4, the control valve 2 is not required to be disposed in each accessory 4, and only the pipeline in the accessory 4 is required to be communicated with the pipeline in the extension pipe 3 (generally, when the accessory 4 is communicated with the extension pipe 3, the pipelines are communicated together), so that the cost is effectively reduced, and each accessory 4 can realize a self-cleaning function.

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

Referring to fig. 5-7, and also to fig. 1-4, the control valve 2 includes a valve body 20. The valve body 20 defines a relatively independent supply passage 203 and a self-cleaning passage 204 therein. The supply channel 203 and the self-cleaning channel 204 are arranged crosswise. Further, the control valve 2 further comprises a supply inlet conduit 205 and a supply outlet conduit 206 in fluid communication with the supply channel 203, and a self-cleaning inlet conduit 07 and a self-cleaning outlet conduit 208 in fluid communication with the self-cleaning channel 204. The supply inlet duct 205, the supply outlet duct 206, the self-cleaning inlet duct 07 and the self-cleaning outlet duct 208 are substantially at the same level. By this arrangement, the height of the entire control valve 2 can be further effectively reduced, the installation space thereof can be reduced, and the suction passage 41 can be maximized without increasing the volume of the attachment 4.

In one embodiment, extension tube 3 includes a connection portion 33 and a hose 34, connection portion 33 is generally composed of a hard material, and a portion of fluid delivery path 1 is disposed within hose 34, thereby making the overall product more aesthetically pleasing. This arrangement, in which the hose 34 is rotatable relative to the connection 33 in the direction of the axis of the hose 34, ensures that the user rotates the fitting 4 during use of the fitting 4, but the hose 34 is not rotated, is more convenient to use, and further, in order to prevent the fluid conveying path 1 within the hose 34 from being deformed by excessive rotation of the fitting 4 to cause blockage of the pipe, the rotation angle between the connection 33 and the hose 34 is less than 360 degrees.

Referring to fig. 8-14, reference may also be made to fig. 5, wherein the direction indicated by the arrows is the direction of fluid flow. In the embodiment shown in the figures, the control valve 2 for controlling the transfer of fluid comprises a valve body 20 defining two relatively independent first 21 and second 22 channels. The valve body 20 further includes a first inlet 211 and a first outlet 212 in fluid communication with the first passage 21, the fluid flowing from the first inlet 211 into the first passage 21 and then out of the first outlet 212. Meanwhile, the valve body 20 further includes a second inlet 221 and a second outlet 222 in fluid communication with the second passage 22, and fluid flows into the second passage 22 from the second inlet 221 and then flows out from the second outlet 222. The control valve 2 is configured to control opening/closing of one of the first passage 21 and the second passage 22. The other channel is a normally open channel. The first and

second passages

21, 22 are arranged crosswise, the crosswise arrangement described herein referring to the fact that the projections of the first and

second passages

21, 22 on a certain plane have an intersection, it being further understood that it is assumed that a plane is provided which can divide the control valve 2 in half, wherein the first inlet 211 and the second outlet 222 are on one side of the plane and the first outlet 212 and the second inlet 221 are on the other side of the plane. By arranging the two channels on the same valve body 20, the installation space of the control valve 2 can be saved, and the whole pipeline is more convenient to install.

In one specific embodiment (refer to fig. 8-14), the valve body 20 includes a cylindrical body 23, a valve cap 24, and a valve stem 25, the valve stem 25 being slidably received in the valve body 20, both ends of the valve stem 25 being provided with a first water stop 251 and a second water stop 252, respectively, a fluid passage 253 (a portion of the second passage 22) being defined between the first water stop 251 and the second water stop 252. The valve stem 25 is configured to be movable between an open position (see fig. 14) and a closed position (see fig. 13) to open and close the first passage 21. One end of the valve rod 25 is provided with a pressing key 26, a user can control the opening and closing of the second channel 22 by pressing the key 26, an elastic piece 27 is arranged between the pressing key and the columnar main body 23, the valve rod 25 is reset by means of the elastic force of the elastic piece 27 so as to realize the normally closed state of the first channel 21, specifically, one end, close to the pressing key, of the columnar main body 23 is provided with a guide column 28, a spring is arranged outside the guide column 28, and the valve rod 25 is reset by the spring. In one embodiment, the second water stop 252 is disposed close to the pressing key 26, the first water stop 251 is disposed away from the pressing key 26, a second sealing ring 254 is disposed between the second water stop 252 and the pressing key 26, the second sealing ring 254 is mounted on the valve rod 25, the second sealing ring 254 keeps sealing with the valve body 20 during the movement of the valve rod 25, and fluid leakage from the first passage 21 is prevented (when the guide post 28 is of a hollow structure and communicates with the first passage 21 of the valve body 20, the second sealing ring 254 keeps sealing with the interior of the guide post 28). A first sealing ring 255 is disposed between the first sealing member 251 and the second sealing member 252, the first sealing ring 255 is disposed in the fluid channel 253, when the first sealing member 251 abuts against the first sealing ring 255, a seal is formed between the first sealing member 251 and the first sealing ring 255, so that the fluid channel 253 is blocked, the first channel 21 is closed, and when the first sealing member 251 is far away from the first sealing ring 255, the first channel 21 is opened, and in other alternative embodiments, the second sealing ring 254 may be disposed on the valve rod 25, and the opening and closing of the first channel 21 are realized along with the movement of the valve rod 25.

The cylindrical body 23 defines a recess 231 (see fig. 11-14), both ends of the recess 231 being in fluid communication with the second inlet 221 and the second outlet 222, respectively, the recess 231 cooperating with the valve cover 24 to form part of the second passage 22; because the valve rod 25 is in a columnar structure, in order to match the valve rod 25, the whole valve body 20 is more compact in structure, the groove 231 is an arc-shaped groove 231, and the arc-shaped groove 231 is arranged around the axis of the valve rod 25; when the valve cover 24 is coupled to the cylindrical body 23, the groove 231 is sealed, and at this time, the second passage 22 is formed in the valve body 20.

Referring to fig. 11, in combination with other figures, the columnar body 23 has opposite first and second ends 233 and 234 along the axial direction of the valve stem 25, the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 are disposed near the first end 233, and the arc-shaped groove 231 is disposed 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 substantially within the same height, it is possible to realize that the two channels are independent of each other and cross each other. Specifically, the same height may be understood as the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 being substantially at the same height along the height direction of the valve body 20, and it may be understood 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 axis direction of the valve body 20 when the control valve 2 is a plunger valve, although the above description is not limited to the type of the control valve 2, and it is convenient to understand that the control valve 2 may be other types of valves, such as a stop valve, etc.

Further, the bottom wall 232 of the groove 231 is higher than the second inlet 221 and the second outlet 222, so that the intersection of the two channels is realized without affecting the flow rate of the control valve. Meanwhile, the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 are substantially within the same height. The height of the whole valve body 20 can be effectively reduced, and the space occupied by the control valve 2 can be reduced.

In one embodiment (referring to fig. 11), the outer diameter of the tube in the axial direction of the columnar body 23 is greater than half the height of the columnar body 23. In this way, the height of the whole valve body 20 is effectively reduced without reducing the radius of the pipe, thereby reducing the space occupied by the control valve 2.

With continued reference to fig. 8-14, the control valve 2 further includes a first inlet conduit 213 extending along the first inlet 211 and a first outlet conduit 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 conduit 213 and the second outlet conduit 224 are disposed substantially coaxially; in another embodiment, the first inlet conduit 213 and the second outlet conduit 224 are disposed substantially coaxially and the second inlet conduit 223 and the first outlet conduit 214 are disposed substantially coaxially.

Further, for better mounting of the control valve 2 into the mounting space, the first inlet conduit 213 and the second inlet conduit 223 are arranged substantially parallel, optionally the first outlet conduit 214 and the second outlet conduit 224 are arranged substantially parallel. In this way, the whole control valve is elongated and has a lower height than a typical plunger valve, and is more suitable for installation in an accessory to ensure maximum suction passage in the accessory.

Since the second passage 22 is a normally open passage, for controlling the second outlet pipe 224, the outlet end of the second outlet pipe 224 is provided with a shut-off member configured to conduct the second outlet pipe 224 and the delivery pipe when the second outlet pipe 224 is in communication with the delivery pipe; the second outlet conduit 224 is closed when the second outlet conduit 224 is not in communication with the delivery conduit.

Referring to fig. 15, wherein the direction indicated by the arrow is the direction of fluid flow, in another embodiment, a control valve 2 for controlling fluid delivery includes a valve body 20 defining two relatively independent first and second passages. The control valve in the embodiment of fig. 15 differs from the control valve in the embodiment of fig. 8-14 only in that the first and second passages in this embodiment are not arranged crosswise, and that other structures within the valve may refer to the structures in the embodiment of fig. 8-14 (the same reference numerals). The first channel is provided at both ends thereof with a first inlet 211 and a first outlet 212 in fluid communication with the first channel, and fluid flows into the first channel from the first inlet 211 and then flows out from the first outlet 212. The second channel is provided at both ends thereof with a second inlet 221 and a second outlet 222 in fluid communication with the second channel, and 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 opening/closing of one of the first passage and the second passage. Meanwhile, the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 are substantially within the same height. The height of the whole valve body 20 can be effectively reduced, and the space occupied by the control valve 2 can be reduced. Specifically, the same height may be understood as the first inlet 211, the first outlet 212, the second inlet 221, and the second outlet 222 being substantially at the same height along the height direction of the valve body 20, and it may be understood 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 axis direction of the valve body 20 when the control valve 2 is a plunger valve, although the above description is not limited to the type of the control valve 2, and it is convenient to understand that the control valve 2 may be other types of valves, such as a stop valve, etc.

In one specific embodiment, the valve body 20 includes a cylindrical body 23, a valve cap 24, and a valve stem 25, the valve stem 25 being slidably received in the valve body 20, both ends of the valve stem 25 being provided with a first water stop 251 and a second water stop 252, respectively, a fluid passage 253 (a portion of the second passage) being defined between the first water stop 251 and the second water stop 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; one end of the valve rod 25 is provided with a pressing key 26, a user can control the opening and closing of the second channel by pressing the key 26, an elastic piece 27 is arranged between the pressing key and the columnar main body 23, the valve rod 25 is reset by means of the elastic force of the elastic piece 27 so as to realize the normally closed of the first channel, specifically, one end, close to the pressing key, of the columnar main body 23 is provided with a guide column 28, and the outer side of the guide column 28 is provided with a spring. In one embodiment, the second water stop 252 is disposed close to the pressing key 26, the first water stop 251 is disposed away from the pressing key 26, a second sealing ring 254 is disposed between the second water stop 252 and the pressing key 26, the second sealing ring 254 is mounted on the valve rod 25, the second sealing ring 254 keeps sealing with the valve body 20 during the movement of the valve rod 25, and fluid leakage from the first channel is prevented (when the guide post 28 is of a hollow structure and is in communication with the first channel of the valve body 20, the second sealing ring 254 keeps sealing with the interior of the guide post 28). A first sealing ring 255 is disposed between the first sealing member 251 and the second sealing member 252, the first sealing ring 255 is disposed in the fluid channel 253, when the first sealing member 251 abuts against the first sealing ring 255, a seal is formed between the first sealing member 251 and the first sealing ring 255, so that the fluid channel 253 is blocked, the first channel is closed, and when the first sealing member 251 is far away from the first sealing ring 255, the first channel is opened, and in other alternative embodiments, the second sealing ring 254 may be disposed on the valve rod 25, and the valve rod 25 moves to open and close the first channel.

The cylindrical body 23 defines a recess 231, the recess 231 having a second inlet 221 and a second outlet 222 in fluid communication, the recess 231 cooperating with the valve cover 24 to form part of a second passageway; because the valve rod 25 is in a columnar structure, in order to match the valve rod 25, the whole valve body 20 is more compact in structure, the groove 231 is an arc-shaped groove 231, and the arc-shaped groove 231 is arranged around the axis of the valve rod 25; when the valve cover 24 is coupled to the cylindrical body 23, the groove 231 is sealed, and at this time, a second passage is formed in the valve body 20.

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

The control valve 2 further comprises a first inlet conduit 213 extending along the first inlet 211 and a first outlet conduit 214 extending along the first outlet 212; and a second inlet conduit 223 extending along the second inlet 221 and a second outlet conduit 224 extending along the second outlet 222. In one embodiment, the first inlet conduit 213 and the first outlet conduit 214 are disposed substantially coaxially; in another embodiment, the first inlet conduit 213 and the first outlet conduit 214 are disposed substantially coaxially and the second inlet conduit 223 and the second outlet conduit 224 are disposed substantially coaxially.

Further, for better installation of the control valve 2 into the installation space, the first inlet conduit 213 and the second inlet conduit 223 are arranged substantially parallel, optionally the second outlet conduit 224 and the second outlet conduit 224 are arranged substantially parallel. Thus, the whole control valve 2 is equivalent to comprising two mutually parallel pipelines, so that the space can be effectively saved, and the installation is more convenient.

Since the second channel is a normally open channel, for controlling the second outlet pipe 224, the outlet end of the second outlet pipe 224 is provided with a stop configured to conduct the second outlet pipe 224 and the delivery pipe when the second outlet pipe 224 is in communication with the delivery pipe; the second outlet conduit 224 is closed when the second outlet conduit 224 is not in communication with the delivery conduit.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but is intended to cover all equivalent structures described in the specification and drawings, or any other related art, directly or indirectly, as would be within the scope of the invention.

Claims

1. A control valve for controlling fluid delivery, comprising

A valve body defining two relatively independent first and second passages;

a first inlet and a first outlet in fluid communication with the first channel, and a second inlet and a second outlet in fluid communication with the second channel;

wherein the first channel and the second channel can be conducted simultaneously, one of the first channel and the second channel is in a normally open state, and the other channel can be controlled to be opened/closed by the control valve;

the control valve further includes a valve stem received in the valve body, the valve stem and valve body defining therebetween at least a portion of one of the first and second passages; the valve stem being movable in the valve body and the valve stem having an open position and a closed position, the valve stem being movable between the open position and the closed position to open and close the at least partial passageway;

the valve body is further provided with a groove defining the other of the first and second passages.

2. The control valve of claim 1, wherein,

the valve body further comprises a columnar body and a valve cover, the valve rod is slidably connected in the columnar body, and at least part of one of the first channel and the second channel is defined between the valve rod and the columnar body;

the groove is disposed on the columnar body, and the groove cooperates with the valve cover to form the other of the first channel and the second channel.

3. The control valve of claim 2, wherein,

the grooves are arc-shaped grooves which are arranged around the axis of the valve rod.

4. The control valve of claim 2, wherein,

the valve rod comprises a first water stop and a second water stop, the at least partial channel is arranged between the first water stop and the second water stop, and the first water stop can open or close the at least partial channel along with the sliding of the valve rod.

5. The control valve of claim 4, wherein,

a pressing key is further arranged at one end of the valve rod, and an elastic piece is further arranged between the pressing key and the columnar main body; and the elastic piece can drive the valve rod to reset so that the first water stopping piece closes the at least part of the channel.

6. The control valve of claim 5, wherein,

the columnar main body is close to one end of the pressing key and is provided with a guide column, the elastic piece is arranged to be sleeved with a spring on the guide column, and two ends of the spring are respectively abutted to the pressing key and the columnar main body.

7. The control valve of claim 2, wherein,

the control valve further includes a first inlet conduit extending along the first inlet and a first outlet conduit extending along the first outlet; and a second inlet duct extending along the second inlet and a second outlet duct extending along the second outlet.

8. The control valve of claim 7, wherein,

the first inlet duct, the second inlet duct, the first outlet duct and the second outlet duct are substantially within the same height.

9. The control valve of claim 8, wherein,

the outer diameters of the four pipes are substantially the same, wherein the outer diameter of the pipe is greater than half the height of the columnar body along the axial direction of the columnar body.

10. A surface cleaning apparatus comprising a cleaning liquid supply system and a dirt recovery system, characterized in that,

the cleaning liquid supply system comprises a fluid distributor for supplying cleaning liquid to a surface to be cleaned and a fluid conveying path positioned downstream of the fluid distributor, at least part of the fluid conveying path comprises a supply pipeline and a self-cleaning pipeline which are mutually parallel, the supply pipeline is used for supplying the cleaning liquid to the surface to be cleaned, and the self-cleaning pipeline is used for supplying the cleaning liquid to an airflow path of the dirt recovery system; wherein the fluid delivery path includes the control valve of any one of claims 1-9 therein.