CN113020143A

CN113020143A - Control valve and surface cleaning device

Info

Publication number: CN113020143A
Application number: CN202110303093.5A
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: 2021-06-25
Anticipated expiration: 2041-03-22
Also published as: CN116116834A; CN116851367A; CN113020143B

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 or 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

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 valve body, valve cover, valve rod, plunger, hole frame, sealing ring and other parts. In the operation process, the valve rod drives the plunger piston to reciprocate up and down in the middle of the hole frame to complete the opening and closing functions of the valve. The plunger piston and the sealing ring in the valve adopt interference fit, so that the lateral force generated by the compression of the sealing ring is sealed with the hole surface in the valve body and the excircle of the plunger piston, thereby ensuring the sealing property of the valve, avoiding the internal and external leakage and realizing the rapid opening and closing of the valve. Stop valve is compared to the plunger valve, and the stop valve is compared to the plunger valve, and is longe-lived, the labour saving operation, but its regulation stroke is than the stop valve will be long, consequently, its height is higher, and occupation space is great, has the requirement to installation space when using. When the installation space is small, it is not suitable to install the plunger valve.

Disclosure of Invention

In order to solve the above-described problems, a primary object of the present invention is to provide a control valve that can be applied to a wider variety of installation scenarios by reducing the installation height of a spool valve.

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

a valve body defining two relatively independent first and second passages, the control valve being configured to control opening/closing of the first or 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 comprises four conduits, respectively:

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

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

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

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

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

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

Optionally, the valve body comprises a cylindrical body, a bonnet and a valve rod, the cylindrical body defines a groove, and the groove and the bonnet cooperate to form part of the second channel;

optionally, the groove is an arc-shaped groove arranged around the axis of the valve stem;

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

Optionally, the outer diameters of the four conduits are substantially the same, wherein the outer diameter of the conduits in the axial direction of the cylindrical body is greater than half the height of the cylindrical 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 crosswise.

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 comprises four conduits, respectively:

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

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

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

optionally, the cylindrical body has a first end and a second end opposite to each other along the axial direction of the valve rod, the first inlet, the first outlet, the second inlet and the second outlet are disposed at the first end, and the arc-shaped groove is disposed at the second end;

optionally, the bottom wall of the groove 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 passage;

optionally, the four conduits have substantially the same outer diameter, the outer diameter of the conduits being greater than half the height of the cylindrical body in the axial direction of the cylindrical body.

Optionally, the outlet end of the second outlet duct is provided with a cut-off configured to conduct the second outlet duct and the delivery duct when the second outlet duct is in communication with the delivery duct; closing the second outlet conduit when the second outlet conduit is not in communication with a delivery conduit.

In yet another aspect, the present invention also provides a surface cleaning apparatus comprising a cleaning liquid supply system and a soil recovery system,

the cleaning liquid supply system comprises a fluid distributor for supplying cleaning liquid to the surface to be cleaned and a fluid conveying path located 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 pollution recovery system; wherein the fluid delivery path includes the control valve.

The invention provides a control valve for controlling fluid transfer, the control valve comprising a valve body defining two relatively independent first and second passages, the control valve being configured to control the opening/closing of either the first or 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 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 used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

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

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

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

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

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

FIG. 6 is a schematic diagram embodying a supply passage in the control valve;

FIG. 7 is a schematic diagram embodying a self-cleaning passage in a control valve;

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

FIG. 9 is a schematic diagram embodying a first passage in the control valve;

FIG. 10 is a schematic diagram embodying a second passage in the control valve;

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

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

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

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

fig. 15 is a schematic structural view of a control valve according to still another embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 7, in which the direction of the arrows in the drawings is the fluid flow direction, the present embodiment discloses a wet type cleaning apparatus 100 including a cleaning liquid supply system and a contamination recovery system. The cleaning liquid supply system comprises a fluid distributor for supplying the cleaning liquid to the surface to be cleaned, which may be a water pump in general, and a fluid delivery path 1 located downstream of the fluid distributor, which may of course be of other constructions, not limited to electric or manual, which can perform the distribution function. In this embodiment, the fluid dispenser is an electromagnetic pump, and the electromagnetic pump is installed in a water pump accommodating cavity defined by the housing. At least part of the fluid conveying path 1 comprises two supply lines 11 and a self-cleaning line 12 arranged next to each other, the supply lines 11 being adapted to supply cleaning liquid to the surface to be cleaned, and the self-cleaning line 12 being adapted to supply cleaning liquid to the air flow path of the soil recovery system. Wherein the supply line 11 and the self-cleaning line 12 are in fluid communication with the fluid distributor via a tee 5. In order to control the supply line 11 and the self-cleaning line 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 line 11 sequentially flows through the first control valve 201 and the second control valve 202 to reach 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 sequentially flows through the first control valve 201 and the second control valve 202 to reach 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 both 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 both the supply line 11 and the self-cleaning line 12.

In order to ensure the same water yield, pipes with the same diameter are generally needed, if the scheme disclosed in the patent CN209750919U is adopted, the supply pipe 11 and the self-cleaning pipe 12 respectively use a single-channel plunger valve, which increases the space for accommodating the valve, and in order to ensure the air intake effect, the volume of the whole accessory 4 is increased; if the volume of the whole accessory 4 is required to be constant, the space used by the air duct needs to be reduced, and the air inlet effect is influenced. Meanwhile, due to the adoption of a single-channel valve, the installation of the pipeline of the other channel is limited at the same time, so that the whole installation is more complicated. Therefore, in the present embodiment, the supply line 11 and the self-cleaning line 12 are integrated into one control valve 2, so that the occupied volumes of the lines and the valves can be effectively reduced, and the pumping efficiency of the pumping channel 41 can be ensured without increasing the diameter of the attachment 4 or the volume of the device. Furthermore, because two pipelines are fixed by the valve, the installation is more convenient.

The soil recovery system includes a soil tank for recovering soil, a fan for generating an air flow, 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 attachment 4 or being directly usable for cleaning a surface to be cleaned. The accessory 4 and the air inlet can be in fluid communication through an extension tube 3, and the extension tube 3 can be one or a combination of several of a hose 34, a rigid tube, a shrink tube or a folded tube, and is not limited in detail here.

The extension duct 3 defines an extension channel having, in the flow direction of the suction airstream, a fluid inlet end 31 and a fluid outlet end 32, 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 pipe 3. The attachment 4 defines a suction passage 41 and a receiving space 42 for receiving the self-cleaning portion, and the control valve 2 and the piping may be disposed in the receiving space 42, the suction passage 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 disposed inside the attachment 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, when the user uses the accessory 4, the part to be held needs to keep a certain distance with the front end of the accessory 4, so that the operation is more ergonomic and more labor-saving, and therefore, the first control valve 201 is arranged at the upstream of the second control valve 202. While the user does not need to exert force when performing the self-cleaning operation, the second control valve 202 may be disposed relatively close to the front end of the attachment 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 accessories 4 may be detachably connected to the extension pipe 3, and with this design, when a plurality of accessories 4 are included in the product, it is not necessary to provide the control valve 2 in each accessory 4, and only the pipe in the accessory 4 is communicated with the pipe in the extension pipe 3 (generally, when the accessories 4 are communicated with the extension pipe 3, the pipes are communicated together), which may effectively reduce the cost, and each accessory 4 may implement the self-cleaning function.

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

Referring to fig. 5-7, and also to fig. 1-4, the control valve 2 includes a valve body 20. A relatively independent supply passage 203 and self-cleaning passage 204 are defined in the valve body 20. The supply passage 203 and the self-cleaning passage 204 are arranged to intersect. 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 height. With 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, the extension pipe 3 includes a connection part 33 and a hose 34, the connection part 33 is generally made of a hard material, and the part of the fluid delivery path 1 is disposed in the hose 34, which makes the whole product more beautiful. The arrangement that the hose 34 is rotatable relative to the connecting portion 33 along the axial direction of the hose 34 ensures that the user can turn the attachment 4 during use of the attachment 4 without rotating the hose 34, which is convenient and fast to use, and further, in order to prevent the fluid conveying path 1 in the hose 34 from being deformed due to the excessive rotation of the attachment 4 to cause the blockage of the pipeline, the rotation angle between the connecting portion 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 delivery of a fluid comprises a valve body 20 defining two relatively independent first 21 and second 22 passages. The valve body 20 further includes a first inlet 211 and a first outlet 212 in fluid communication with the first passage 21, with 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 the fluid flows from the second inlet 221 into the second passage 22 and then flows out from the second outlet 222. The control valve 2 is configured to control opening/closing of one of the two first and

second passages

21 and 22. The other channel is a normally open channel. The first passage 21 and the second passage 22 are arranged crosswise, the described crosswise arrangement being that the first passage 21 and the second passage 22 have an intersection in a projection in a plane, it being further understood that a plane is assumed 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. The two channels are arranged on the same valve body 20, so that the installation space of the control valve 2 can be saved, and the whole pipeline is more convenient to install.

In one particular embodiment (see fig. 8-14), the valve body 20 includes a cylindrical body 23, a bonnet 24, and a valve stem 25, the valve stem 25 being slidably received in the valve body 20, the valve stem 25 having first and second water stops 251 and 252 disposed at opposite ends thereof, respectively, the first and second water stops 251 and 252 defining a fluid passage 253 (portion of the second passage 22) therebetween. The valve rod 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 member 27 is arranged between the key and the columnar main body 23, the valve rod 25 is reset by the elastic force of the elastic member 27 to realize the normally closing of the first channel 21, specifically, one end of the columnar main body 23 close to the key is provided with a guide column 28, the outer side of the guide column 28 is provided with a spring, and the valve rod 25 is reset by the spring. In one embodiment, the second water stop 252 is disposed near the pressing key 26, the first water stop 251 is disposed far 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, and the second sealing ring 254 is always sealed with the valve body 20 during the movement of the valve rod 25 to prevent the fluid from leaking from the first passage 21 (when the guide post 28 is a hollow structure and communicates with the first passage 21 of the valve body 20, the second sealing ring 254 is sealed with the inside of the guide post 28). A first sealing ring 255 is disposed between the first water stop 251 and the second water stop 252, the first sealing ring 255 is disposed in the fluid passage 253, when the first water stop 251 abuts against the first sealing ring 255, a seal is formed between the first water stop 251 and the first sealing ring 255, so as to block the fluid passage 253 and close the first passage 21, and after the first water stop 251 is away from the first sealing ring 255, the first passage 21 is opened, in other alternative embodiments, a second sealing ring 254 may be disposed on the valve rod 25, and the first passage 21 is opened and closed along with the movement of the valve rod 25.

The cylindrical body 23 defines a groove 231 (refer to fig. 11-14), both ends of the groove 231 are respectively in fluid communication with the second inlet 221 and the second outlet 222, and the groove 231 and the valve cover 24 cooperate to form part of the second channel 22; because the valve rod 25 is of a columnar structure, in order to match with 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 bonnet 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 conjunction with other drawings, the cylindrical body 23 has opposite first and second ends 233 and 234 in 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; thus, when the first inlet 211, the first outlet 212, the second inlet 221 and the second outlet 222 are substantially in the same height, it is possible to realize that the two channels are independent and cross each other. Specifically, the same height may 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, and it may 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 axial direction of the valve body 20, of course, the above description is not limited to the type of the control valve 2, and is only convenient for understanding the present embodiment, and the control valve 2 may also be other types of valves, such as a stop valve and the like.

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, and the flow of the control valve is not influenced. 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 is reduced.

In one embodiment (see fig. 11), the outer diameter of the conduit in the axial direction of the cylindrical body 23 is greater than half the height of the cylindrical body 23. Thus, the height of the whole valve body 20 is effectively reduced without reducing the radius of the pipeline, 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 duct 223 extending along the second inlet 221 and a second outlet duct 224 extending along the second outlet 222; in one embodiment, the first inlet conduit 213 and the second outlet conduit 224 are arranged substantially coaxially; in another embodiment, the first inlet conduit 213 and the second outlet conduit 224 are arranged substantially coaxially, and the second inlet conduit 223 and the first outlet conduit 214 are arranged substantially coaxially.

Further, for better installation of the control valve 2 into the installation space, the first inlet duct 213 and the second inlet duct 223 are arranged substantially in parallel, optionally the first outlet duct 214 and the second outlet duct 224 are arranged substantially in parallel. Thus, the entire control valve is elongated and has a lower height than a typical spool valve, and is more suitable for installation in an attachment to ensure maximum suction passage in the attachment.

Since the second passage 22 is a normally open passage, in order to control the second outlet duct 224, an outlet end of the second outlet duct 224 is provided with a shut-off member configured to conduct the second outlet duct 224 and the delivery duct when the second outlet duct 224 is communicated with the delivery duct; 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 of the arrows is the direction of fluid flow, in another embodiment, a control valve 2 for controlling the delivery of fluid includes a valve body 20 defining two relatively independent first and second passages. The control valve of the embodiment of fig. 15 differs from the control valve of the embodiment of fig. 8-14 only in that the first and second passages in this embodiment do not intersect, and the structure within the other valves may be as described with reference to the embodiment of fig. 8-14 (and the same reference numerals). Both ends of the first channel are provided 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. Both ends of the second channel are provided with a second inlet 221 and a second outlet 222 in fluid communication with the second channel, and the 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 is reduced. Specifically, the same height may 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, and it may 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 axial direction of the valve body 20, of course, the above description is not limited to the type of the control valve 2, and is only convenient for understanding the present embodiment, and the control valve 2 may also be other types of valves, such as a stop valve and the like.

In one specific embodiment, the valve body 20 includes a cylindrical body 23, a bonnet 24, and a valve rod 25, the valve rod 25 is slidably received in the valve body 20, both ends of the valve rod 25 are respectively provided with a first water stop 251 and a second water stop 252, and a fluid passage 253 (a partial second passage) is 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 part 27 is arranged between the key and the columnar main body 23, the valve rod 25 is reset by the elasticity of the elastic part 27 to realize the normally closing of the first channel, specifically, one end of the columnar main body 23 close to the key 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 near the pressing key 26, the first water stop 251 is disposed far 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, and the second sealing ring 254 is always sealed with the valve body 20 during the movement of the valve rod 25 to prevent the fluid from leaking out of the first passage (when the guide post 28 is a hollow structure and communicates with the first passage of the valve body 20, the second sealing ring 254 is sealed with the inside of the guide post 28). A first sealing ring 255 is disposed between the first water stop 251 and the second water stop 252, the first sealing ring 255 is disposed in the fluid passage 253, when the first water stop 251 abuts against the first sealing ring 255, a seal is formed between the first water stop 251 and the first sealing ring 255, so as to block the fluid passage 253 and close the first passage, and when the first water stop 251 is away from the first sealing ring 255, the first passage is opened, 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 passage is realized along with the movement of the valve rod 25.

The cylindrical body 23 defines a groove 231, the groove 231 being in fluid communication with the second inlet 221 and the second outlet 222, the groove 231 cooperating with the valve cap 24 to form part of the second channel; because the valve rod 25 is of a columnar structure, in order to match with 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 bonnet 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 conduit in the axial direction of the cylindrical body 23 is greater than half the height of the cylindrical body 23. Thus, the height of the whole valve body 20 is effectively reduced without reducing the radius of the pipeline, 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 duct 223 extending along the second inlet 221 and a second outlet duct 224 extending along the second outlet 222. In one embodiment, the first inlet conduit 213 and the first outlet conduit 214 are arranged substantially coaxially; in another embodiment, the first inlet conduit 213 and the first outlet conduit 214 are arranged substantially coaxially, and the second inlet conduit 223 and the second outlet conduit 224 are arranged substantially coaxially.

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

Since the second passage is a normally open passage, in order to control the second outlet duct 224, an outlet end of the second outlet duct 224 is provided with a shut-off member configured to conduct the second outlet duct 224 and the delivery duct when the second outlet duct 224 is communicated with the delivery duct; the second outlet conduit 224 is closed when the second outlet conduit 224 is not in communication with the delivery conduit.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.

Claims

1. A control valve for controlling fluid delivery, comprising

2. The control valve of claim 1,

the control valve further comprises four pipelines, which are respectively:

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

optionally, the first inlet conduit and the second inlet conduit are arranged substantially in parallel;

3. The control valve of claim 1,

the valve body comprises a columnar main body, a valve cover and a valve rod, wherein a groove is defined in the columnar main body and is matched with the valve cover to form part of the second channel;

4. The control valve as recited in claim 3, wherein the four conduits have substantially the same outer diameter, wherein the outer diameter of the conduits is greater than half the height of the cylindrical body in the axial direction of the cylindrical body.

5. A control valve for controlling fluid delivery, comprising

wherein the first channel and the second channel are arranged crosswise.

6. The control valve of claim 5,

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

7. The control valve of claim 5,

the control valve further comprises four pipelines, which are respectively:

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

8. The control valve of claim 5,

9. The control valve of claim 7,

the outlet end of the second outlet pipe is provided with a stopping piece which is configured to conduct the second outlet pipe and the conveying pipe when the second outlet pipe is communicated with the conveying pipe; closing the second outlet conduit when the second outlet conduit is not in communication with a delivery conduit.

10. A surface cleaning apparatus comprising a cleaning liquid supply system and a stain recovery system,

the cleaning liquid supply system comprises a fluid distributor for supplying cleaning liquid to the surface to be cleaned and a fluid conveying path located 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 pollution recovery system; wherein the fluid delivery path includes therein a control valve as defined in any one of claims 1-9.