A three-way joint and a cleaning system

Abstract

The present invention belongs to the technical field of household appliances, and specifically discloses a three-way joint and a cleaning system. The three-way joint includes: a cavity, which includes a main body portion and a bypass portion that intersect and communicate. The main body portion has a first inlet and outlet and a second inlet and outlet. One end of the bypass portion forms a third inlet and outlet, and the other end of the bypass portion is connected to the side wall of the main body portion and forms an intersection opening; a first shutter, which is configured to close the intersection opening when there is no fluid scouring effect in the bypass portion, and open the intersection opening and close the first inlet and outlet when there is a fluid scouring effect in the bypass portion; a second shutter, which is configured to press the second end of the first shutter against the inner wall of the main body portion when the fluid flows from the second inlet and outlet to the first inlet and outlet. The cleaning system includes the above-mentioned three-way joint. The three-way joint and the cleaning system disclosed by the present invention can effectively prevent the water in the main body portion from flowing back into the bypass portion, and improve the operation safety and reliability of the three-way joint and the cleaning system.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a three-way joint and a cleaning system. Background Art

[0002] A three-way joint is a commonly used component in a pipeline system, which is usually used to selectively conduct a flow path, so as to realize the commutation or interception of fluid.

[0003] Existing three-way joints generally include a main pipe and a branch pipe that intersect and communicate. The two ends of the main pipe respectively form a fluid inlet and a fluid outlet, and an intersection opening that connects the main pipe and the branch pipe is formed at the intersection of the branch pipe and the main pipe. A valve for selectively blocking the intersection opening is arranged inside the three-way joint to conduct or block the main pipe and the branch pipe. Among them, the valve usually has a structure form in which one end is hinged to the inner wall of the cavity and the other end is in a free state, so as to realize the automatic opening or closing of the valve under the action of fluid scouring.

[0004] In the structure of the existing three-way joint, the first end of the valve is located between the fluid inlet and the intersection opening of the main pipe. When the valve blocks the intersection opening, the second end is pressed against the inner wall of the cavity under the elastic action of the torsion spring. This setting method can ensure that when the fluid flows from the fluid inlet of the main pipe to the fluid outlet of the main pipe, water will not enter the branch pipe. However, since there is usually a certain fluid backflow phenomenon in the pipeline system, when there is water flow from the fluid outlet to the fluid inlet, due to the scouring action of the fluid, the second end of the valve may be separated from the inner wall of the cavity, resulting in a gap between the valve and the inner wall of the cavity, so that the fluid backflows into the branch pipe, affecting the normal use of the three-way joint. Seriously, it may even cause damage to the entire pipeline system. Summary of the Invention

[0005] The purpose of the present invention is to provide a three-way joint to improve the operation safety and reliability of the three-way joint.

[0006] Another purpose of the present invention is to provide a cleaning system to improve the use reliability and use safety of the cleaning system.

[0007] To achieve the above purposes, the present invention adopts the following technical solutions:

[0008] A three-way joint, comprising:

[0009] A cavity, the cavity includes a main body part and a bypass part that intersect and communicate. The main body part has a first inlet and a second inlet. One end of the bypass part forms a third inlet, and the other end of the bypass part is connected to the side wall of the main body part and forms an intersection opening;

[0010] The first baffle door is arranged inside the main body part, and the first end of the first baffle door is hinged to the inner wall of the main body part. The first baffle door is configured to close the confluence port when there is no fluid scouring effect in the bypass part, and open the confluence port and close the first inlet and outlet when there is a fluid scouring effect in the bypass part;

[0011] The second baffle door is arranged inside the main body part, and the second baffle door is configured to press the second end of the first baffle door against the inner wall of the main body part when the fluid flows from the second inlet and outlet to the first inlet and outlet.

[0012] As a preferred technical solution of the three-way joint, the first end of the first baffle door is located between the confluence port and the first inlet and outlet, and the second baffle door and the first end of the first baffle door are respectively located on opposite sides of the confluence port. With this setting, when there is fluid flowing from the first inlet and outlet to the second inlet and outlet in the three-way joint, the fluid can flow along the first baffle door towards the second inlet and outlet, and the first baffle door is pressed against the inner wall of the cavity under the action of the fluid flow pressure, avoiding the fluid from flowing back into the bypass part.

[0013] As a preferred technical solution of the three-way joint, the first end of the second baffle door is hinged to the inner wall of the main body part, and the second end of the second baffle door is in a free state, so that the second end of the second baffle door can flip in a direction away from or towards the confluence port; the sum of the lengths of the first baffle door from its first end to its second end and the second baffle door from its first end to its second end is greater than the distance between the first end of the first baffle door and the first end of the second baffle door. With this setting, the second baffle door can flip under the scouring action of the fluid entering from the second inlet and outlet to press the second end of the first baffle door, making the structure of the second baffle door simple, easy to set, with low cost, and not requiring an additional control structure or driving structure to drive the operation, and can ensure the operation reliability of the second baffle door. At the same time, with this setting, while closing the gap between the second end of the second baffle door and the main body part, it can guide the fluid entering from the second inlet and outlet, making the fluid flow along the second baffle door, and further forming a fluid-free flow area between the second end of the second baffle door and the second end of the first baffle door, further preventing the fluid from flowing back into the bypass part.

[0014] As a preferred technical solution of the three-way joint, the bypass part is obliquely connected to the main body part, and the bypass part extends obliquely in a direction away from the first inlet and outlet from the third inlet and outlet to the confluence port. With this setting, in the first conduction state of the three-way joint, the fluid path formed between the third inlet and outlet and the second inlet and outlet is generally a V-shaped structure with an angle greater than 90°, so as to improve the smoothness of fluid flow and avoid dust and other impurities from staying at the corners of the fluid channel.

[0015] As a preferred technical solution of a three-way joint, in the initial installation state of the first shutter, the first shutter seals the confluence opening. When the first shutter seals the first inlet / outlet, the first shutter inclines relative to the central axis of the main body portion in a direction away from the first inlet / outlet along its first end to the second end. With this arrangement, when the first shutter seals the first inlet / outlet, the first shutter can incline in a direction away from the first inlet / outlet along its first end to the second end, so that the first conduction path can be closer to a V-shaped structure, reducing the corners of the first conduction path and improving the smoothness of fluid flow.

[0016] As a preferred technical solution of a three-way joint, the included angle between the bypass portion and the main body portion is a first acute angle. When the first shutter seals the first inlet / outlet, the included angle between the first shutter and the central axis of the main body portion is a second acute angle, and the first acute angle is greater than or equal to the second acute angle. With this arrangement, the corner angle of the V-shaped structure can be enlarged to further guide the fluid to flow to the second inlet / outlet and minimize the retention of dust at the corners of the V-shaped structure.

[0017] As a preferred technical solution of a three-way joint, the three-way joint further includes a third shutter, and the third shutter is located inside the bypass portion; the third shutter is configured to block the third inlet / outlet and the confluence opening when no fluid enters the third inlet / outlet, and conduct the third inlet / outlet and the confluence opening when fluid enters the third inlet / outlet. By providing the third shutter, it can be further ensured that no water enters the bypass portion in the second conduction state and the third conduction state, further ensuring the effective operation of the dust collection device.

[0018] As a preferred technical solution of a three-way joint, each shutter is correspondingly provided with an elastic member for keeping the corresponding shutter in the initial installation state or restoring it to the initial installation state. The setting of the elastic member can ensure the normal operation of each shutter.

[0019] A cleaning system includes: a dust collection device and a cleaning device. The cleaning device includes a drain pipe having a drain opening communicating with the outside. The dust collection device includes a dust collection box. The cleaning system further includes a docking pipe and the three-way joint as described above. One end of the docking pipe is communicated with the dust discharge port of the dust collection box, the other end of the docking pipe is hermetically communicated with the bypass portion, the main body portion is hermetically connected into the drain pipe, and the second inlet / outlet is located at one end facing the drain opening.

[0020] As a preferred technical solution of a cleaning system, the cleaning system further includes a pressure detection device and a controller, wherein the pressure detection device is used to detect the fluid pressure in the main body and / or the bypass portion, and the pressure detection device is connected to the controller, and when the docking tube is docked with the dust discharge port and the detection value of the pressure detection device is greater than a preset value, the controller controls the dust collection device to stop dust removal. This arrangement can ensure that during the drainage process of the drain pipe, the dust collection device will not perform dust removal operations through the drain pipe, thereby ensuring the operational reliability of the cleaning system.

[0021] The beneficial effects of the present invention are:

[0022] The three-way joint provided by the present invention can switch the three-way joint between a first conductive state and a second conductive state: when the three-way joint is in the first conductive state, the fluid flows into the bypass part from the third inlet and outlet of the bypass part, and the first baffle opens the intersection and closes the first inlet and outlet under the action of fluid flushing, and the fluid flows in from the third inlet and outlet and flows out from the second inlet and outlet; when the three-way joint is in the second conductive state, the bypass part is in a state where there is no fluid flow, the first baffle closes the intersection, the first inlet and outlet are conductive, and the second baffle presses the second end of the first baffle against the corresponding inner wall of the main body, so that the fluid can flow from the second inlet and outlet to the first inlet and outlet, while being able to avoid the fluid from flowing into the bypass part from the gap between the second end of the first baffle and the inner wall of the main body as much as possible, preventing the fluid from flowing back into the bypass part in the second conductive state, thereby improving the reliability of the three-way joint.

[0023] The cleaning system provided by the present invention adopts the above-mentioned three-way joint to connect the docking pipe and the drain pipe. When the docking pipe is connected to the dust discharge port of the dust collecting box, it can prevent water from flowing back into the docking pipe during the drainage and return water states of the drain pipe, thereby causing water to enter the dust collecting box, thereby improving the safety and reliability of the cleaning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural front view of the cleaning system provided by an embodiment of the present invention after the vacuuming device and the cleaning device are connected;

[0025] Figure 2 It is a structural schematic diagram of a cleaning device and a dust removal docking device provided by an embodiment of the present invention;

[0026] Figure 3 is a top view schematic diagram of the cleaning system provided by an embodiment of the present invention after the vacuuming device and the cleaning device are docked;

[0027] Figure 4 is a schematic structural diagram of a three-way connector provided by an embodiment of the present invention in a first conducting state;

[0028] Figure 5 It is a schematic structural diagram of the tee joint provided by the embodiment of the present invention in the second conduction state;

[0029] Figure 6 It is a schematic structural diagram of the tee joint provided by the embodiment of the present invention in the third conduction state.

[0030] The markings in the figure are as follows:

[0031] 1. Dust exhaust docking device; 11. Pressing member; 12. Docking pipe; 121. Conical pipe portion; 122. Straight cylinder portion; 13. Transmission assembly; 131. Pushing rod; 1311. Sliding groove; 132. Pulling rope; 133. First guide wheel; 134. Second guide wheel; 14. Docking hose; 15. Elastic reset member; 16. Mounting shaft; 17. Slide block;

[0032] 2. Tee joint; 21. Cavity; 211. Main body portion; 212. Bypass portion; 22. First shutter; 23. Second shutter; 24. Third shutter; 25. Hinge shaft;

[0033] 3. Dust suction device; 31. Dust collection box; 32. Housing;

[0034] 4. Cleaning device; 41. Chamber; 411. Chamber bottom plate; 412. Chamber top plate; 413. Chamber side plate; 42. Working space; 43. Drain pipe. Detailed implementation manners

[0035] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0036] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may also include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] Figure 1 is the main structural view of the cleaning system provided by the embodiment of the present invention after the dust suction device and the cleaning device are docked. Figure 2 is the structural schematic diagram of the cleaning device and the dust exhaust docking device provided by the embodiment of the present invention. As Figure 1 and 2 shown, this embodiment provides a cleaning system, which includes a dust suction device 3, a cleaning device 4, and a dust exhaust docking device 1 for realizing the docking of the dust suction device 3 and the cleaning device 4. The dust suction device 3 can move autonomously to realize the cleaning and dust removal of the ground. A dust collection box 31 for collecting dust is provided on the dust suction device 3; the cleaning device 4 is fixedly arranged on the ground. A chamber 41 for the dust suction device 3 to enter or exit is provided at the bottom of the cleaning device 4. And the cleaning device 4 is provided with a drain pipe 43, and the drain pipe 43 is used for the drainage of the cleaning device 4 and discharging the dust to the outside of the dust suction device 3; the dust exhaust docking device 1 is arranged in the chamber 41 and is used for connecting the dust exhaust port of the dust collection box 31 and one end of the drain pipe 43 after the dust suction device 3 enters the chamber 41.

[0040] The cleaning system provided in this embodiment can, by setting up the cleaning device 4 and the dust exhaust docking device 1, control the dust suction device 3 to run into the chamber 41 when the dust collection box 31 of the dust suction device 3 needs to be cleaned, enabling the dust exhaust docking device 1 to achieve automatic docking between the dust collection box 31 and the drain pipe 43. Then, by utilizing the negative pressure dust removal function of the dust suction device 3 itself, the dust in the dust collection box 31 enters the drain pipe 43 through the dust exhaust port under the action of negative pressure, and the drain pipe 43 is used to discharge the dust to a specific position, thereby realizing automatic cleaning of the dust collection box 31. This cleaning method for the dust collection box 31 does not require manual operation, has a high degree of automation, can effectively improve the cleaning efficiency of the dust collection box 31, and ensure the effective and reliable operation of the dust suction device 3. At the same time, since the dust collection box 31 can be cleaned in a timely and effective manner, on the basis of ensuring the overall volume of the dust suction device 3 remains unchanged, the required volume of the dust collection box 31 can be reduced, the battery capacity of the dust suction device 3 can be increased, thereby increasing the power and speed of the motor in the dust suction device 3, and further increasing the suction force, solving the defect that the existing floor sweeping robot has a smaller suction force compared to the vacuum cleaner, and thus improving the cleaning effect of the dust suction device 3. Moreover, the cleaning system provided in this embodiment can enable some structures of the cleaning device 4 to be shared with the dust suction device 3 on the premise of ensuring that its original functions are not disturbed, expand the functions of the cleaning device, avoid additionally setting up structures for cleaning the dust collection box 31, simplify the structure of the cleaning system, reduce the overall floor space occupied by the cleaning system, and reduce the overall cost of the cleaning system required for the family.

[0041] In this embodiment, the dust suction device 3 can be a floor sweeping robot. Preferably, the cleaning device 4 is a device that needs to drain water, such as a washing machine or a dishwasher. In this embodiment, the structure of the cleaning system is described in detail taking the cleaning device 4 as a washing machine as an example, and it can be understood that when the cleaning device 4 is a dishwasher or other devices, the setting of the dust exhaust docking device 1 on the cleaning device 4 can refer to the setting in this embodiment.

[0042] The cleaning device 4 includes a housing, which is divided into an upper working space 42 and a lower chamber 41 by a horizontally arranged partition board. The main working components of the cleaning device 4 are all arranged in the working space 42. The chamber 41 has a hexahedron structure, but it can be understood that the shape of the chamber 41 is adapted to the outer shape of the cleaning device 4 to improve the versatility of the cleaning system and reduce the improvement cost of the cleaning system. For example, when the washing machine serving as the cleaning device 4 is cylindrical, the chamber 41 is cylindrical.

[0043] The housing includes the chamber side plates 413 that enclose three sides of a hexahedron structure and the chamber bottom plate 411 that forms the bottom surface of the hexahedron structure. The partition forms the chamber top plate 412. The chamber bottom plate 411, the chamber top plate 412, and the three chamber side plates 413 enclose a chamber 41 with one side open. In another embodiment, the housing may not include the chamber bottom plate 411 at the bottommost part, that is, the ground where the cleaning device 4 is located forms the bottom of the chamber 41. In still another embodiment, the chamber top plate may not be provided, and the working space is directly connected to the chamber 41.

[0044] Furthermore, to protect the structures inside the chamber 41, the cleaning device 4 further includes a chamber door installed at the opening of the chamber 41, and the chamber door can selectively open and close the opening of the chamber 41. The structure of the chamber door can refer to the structure of the existing door body that can achieve automatic opening and closing, and will not be elaborated here.

[0045] The dust exhaust docking device 1 includes a pressing member 11 provided at the bottom of the chamber 41, a docking pipe 12 vertically provided at the top of the chamber 41, and a transmission assembly 13 connected between the pressing member 11 and the docking pipe 12. The pressing member 11 is inclined downward in the direction towards the opening of the chamber 41, and the pressing member 11 has a first end facing the opening of the chamber 41 and a second end opposite to the first end. The transmission assembly 13 is connected between the docking pipe 12 and the second end of the pressing member 11, and the upper end of the docking pipe 12 is connected to the drain pipe 43. When the dust suction device 3 gradually enters the chamber 41 from the opening of the chamber 41, the bottom of the dust suction device 3 presses down the pressing member 11, so that the second end of the pressing member 11 can be gradually pressed down as the dust suction device 3 moves inward, and drives the docking pipe 12 to move downward through the transmission assembly 13 and insert into the dust exhaust port of the dust collection box 31.

[0046] The dust exhaust docking device 1 provided in this embodiment realizes the downward movement of the docking pipe 12 through the action of pressing down the pressing member 11 during the process of the dust suction device 3 entering the chamber 41, without additionally setting a driving device for driving the movement of the docking pipe 12, which can better simplify the structure of the dust exhaust docking device 1, reduce the floor space occupied by the dust exhaust docking device 1, reduce costs, and can realize the automatic docking of the dust collection box 31 and the docking pipe 12, with good docking effect.

[0047] Furthermore, to improve the docking reliability and docking stability between the docking pipe 12 and the dust collection box 31, during the process from the dust suction device 3 entering the chamber 41 and starting to press against the pressing member 11 to the dust suction device 3 stopping moving, the docking pipe 12 moves downward and horizontally synchronously with the dust suction device 3 to increase the insertion depth of the docking pipe 12 into the dust collection box 31. At the same time, it avoids the contact between the docking pipe 12 and the dust collection box 31 from hindering the operation of the dust suction device 3.

[0048] Preferably, the pressing member 11 is a pressing plate, which is inclined relative to the bottom plate 411 of the cabin, and the first end of the pressing plate facing the opening of the cabin 41 abuts against the bottom plate 411 of the cabin. With this arrangement, the contact area between the pressing member 11 and the bottom of the dust collection device 3 can be increased, effectively ensuring that the second end of the pressing member 11 can be pressed down. In other embodiments, the pressing member 11 can also be a rod-shaped structure arranged obliquely, and a plurality of pressing members 11 can also be arranged at intervals in the horizontal direction perpendicular to the pressing member 11.

[0049] Optionally, the projected area of the pressing member 11 on the bottom plate 411 of the cabin is larger than the projected area of the dust collection device 3 on the bottom plate 411 of the cabin, and when the dust collection device 3 enters the cabin 41, the whole dust collection device 3 is located on the pressing member 11, so that the second end of the pressing member 11 moves downward under the gravity of the dust collection device 3, which can reduce the wear of the pressing member 11 on the bottom shell of the dust collection device 3. In other embodiments, when the dust collection device 3 enters the cabin 41, the pressing member 11 can also be located between the two side rollers of the dust collection device 3, and during the process of the dust collection device 3 moving into the interior of the cabin 41, the bottom shell of the dust collection device 3 presses against the pressing member 11, causing the second end of the pressing member 11 to move downward.

[0050] Furthermore, to improve the docking reliability between the docking pipe 12 and the dust discharge port of the dust collection box 31, the docking pipe 12 includes a tapered pipe portion 121 at its lower end, and the tapered pipe portion 121 is in the form of being larger at the upper end and smaller at the lower end. The dust discharge port is a tapered opening that is larger at the upper end and smaller at the lower end. The smallest diameter of the tapered opening is larger than the smallest outer diameter of the tapered pipe portion 121, and the largest diameter of the tapered opening is smaller than the largest outer diameter of the tapered pipe portion 121. When the docking pipe 12 is inserted into the dust discharge port in place, the tapered hole and the tapered pipe portion 121 are in close fit. With this setting method, during the process of the tapered pipe portion 121 being inserted downward, as the insertion depth of the tapered pipe portion 121 increases, the docking tightness between the docking pipe 12 and the dust discharge port increases.

[0051] Preferably, the docking pipe 12 is made of an elastic material such as rubber or silica gel, which can utilize the deformation of the docking pipe 12 itself to improve the insertion tightness between the tapered pipe portion 121 and the dust discharge port, and at the same time can achieve a better sealing effect.

[0052] In this embodiment, the dust collection box 31 is located inside the vacuum cleaning device 3. To allow the docking pipe 12 to be inserted into the dust discharge port, an avoidance hole is provided in the housing 32 of the vacuum cleaning device 3 at a position corresponding to the dust discharge port. The avoidance hole is directly opposite to communicate the dust discharge port with the outside of the vacuum cleaning device 3, and the docking pipe 12 can be inserted into the dust discharge port through the avoidance hole. Optionally, the avoidance hole has a tapered structure with a larger upper diameter and a smaller lower diameter, and the minimum diameter of the avoidance hole is larger than the maximum diameter of the dust discharge port. When the docking pipe 12 is inserted into the dust discharge port in place, there is a small gap between the hole wall of the avoidance hole and the outer wall of the docking pipe 12 to improve the smoothness of the docking pipe 12 inserted into the dust discharge port. It can be understood that when the dust discharge port of the dust collection box 31 is itself exposed outside the housing 32 of the vacuum cleaning device 3, there is no need to provide an avoidance hole in the housing 32.

[0053] The transmission assembly 13 includes a pull rope 132 and a lever 131. One end of the lever 131 faces the opening of the cabin 41, and the other end is away from the opening of the cabin 41. The first end of the lever 131 is hinged to the inner wall of the cabin 41, the second end of the lever 131 is connected to the first end of the pull rope 132, and the second end of the pull rope 132 is connected to the second end of the pressing member 11. The lever 131 is rotatably connected to the docking pipe 12, and the docking pipe 12 can slide along the length direction of the lever 131. With this setting method, when the pressing member 11 moves downward under the pressure of the vacuum cleaning device 3, the second end of the pressing member 11 descends and drives the second end of the lever 131 to move downward through the action of the pull rope 132; since the docking pipe 12 is located between the first end and the second end of the lever 131, and the first end of the lever 131 is hinged to the side wall of the cabin 41, the lever 131 drives the docking pipe 12 to move downward and insert into the avoidance hole; and when the docking pipe 12 is inserted into the avoidance hole, the hole wall of the avoidance hole drives the docking pipe 12 to move synchronously along the length direction of the lever 131, so that while the docking pipe 12 moves horizontally, it can continue to be inserted into the dust discharge port through the avoidance hole.

[0054] The above setting method of the transmission assembly 13 has a simple structure, occupies a small space, and can realize the downward movement of the docking pipe 12 and the synchronous horizontal movement with the vacuum cleaning device 3 without the drive of an additional drive device, and has good movement reliability. And the lever 131 and the docking pipe 12 are connected to form a lever structure, which can effectively reduce the force required for the second end of the lever 131 to descend and reduce the resistance required for the vacuum cleaning device 3 to press the second end of the pressing member 11 downward after entering the cabin 41.

[0055] Further, to improve the relative sliding smoothness between the butt joint pipe 12 and the lever 131, a long strip-shaped sliding groove 1311 is formed along the length direction of the lever 131. An installation shaft 16 protrudes from the outer wall of the butt joint pipe 12 towards the lever 131. The installation shaft 16 is inserted into the sliding groove 1311 and is slidably connected to the hole wall of the sliding groove 1311, and the installation shaft 16 can rotate in the sliding groove 1311. Further, the installation shaft 16 has a cylindrical structure, which facilitates the rotation of the installation shaft 16 relative to the lever 131. In other embodiments, when the installation shaft 16 is non-cylindrical, the relative rotation of the installation shaft 16 in the sliding groove 1311 can be achieved by increasing the width of the sliding groove 1311.

[0056] To prevent the lever 131 from detaching from the butt joint pipe 12, a limiting portion is provided at one end of the installation shaft 16 away from the butt joint pipe 12, and the limiting portion can limit the installation shaft 16 from detaching from the sliding groove 1311. The limiting member can be, but is not limited to, a disc shape, as long as the size setting of the limiting portion can prevent the limiting portion from passing through the sliding groove 1311.

[0057] To improve the reliability and smoothness of the horizontal movement of the butt joint pipe 12, the dust exhaust butt joint device 1 further includes a guiding assembly for guiding the movement of the butt joint pipe 12. The guiding assembly includes a guide rail provided on the cabin roof 412 along the inlet and outlet direction of the dust suction device 3 and a slider 17 slidably engaged with the guide rail. A guiding hole is vertically formed in the slider 17. The butt joint pipe 12 includes a straight tube portion 122. The outer diameter of the straight tube portion 122 is equal to the aperture of the guiding hole, and the straight tube portion 122 is slidably connected to the hole wall of the guiding hole. This setting method can, on the one hand, guide the vertical movement of the butt joint pipe 12 and improve the reliability of the vertical movement of the butt joint pipe 12; on the other hand, the setting of the slider 17 can also provide support for the butt joint pipe 12.

[0058] Since the upper end of the butt joint pipe 12 needs to be connected to the drain pipe 43 located in the main space, a through hole is formed through the cabin roof 412. The through hole extends along the inlet and outlet direction of the dust suction device 3, and the width of the through hole is greater than the maximum aperture of the guiding hole. The upper end of the butt joint pipe 12 extends into the working space 42 through the through hole. And to improve the guiding stability, guide rails are provided on both opposite sides of the through hole along the width direction, and the slider 17 straddles the two guide rails.

[0059] In another embodiment, the guide rail may not be provided. By setting the slider 17 into a T-shaped structure, the part forming the vertical side of the T-shaped structure is inserted into the through interface, and the part forming the horizontal side of the T-shaped structure is located above the cabin roof 412 and slidably connected to the upper surface of the cabin roof 412, which can also achieve the guidance of the docking pipe 12 in the X direction. In still another embodiment, the docking pipe 12 may be entirely located on the lower surface of the bottom plate of the cabin 41, and the upper end of the docking pipe 12 is connected to the docking hose 14. The docking hose 14 adopts a telescopic hose structure such as a corrugated pipe. A pipe through hole for the docking hose 14 to pass through is opened on the bottom plate of the cabin 41, and the guiding assembly is arranged on the lower surface of the cabin roof 412. When the docking pipe 12 moves horizontally, the telescopic deformation of the docking hose 14 ensures that the docking pipe 12 and the drain pipe 43 are always in a connected state, and this setting does not require a long strip-shaped through interface to be opened on the cabin roof 412, which is beneficial to the waterproof sealing design of the cabin roof 412. In yet another embodiment, the guide rail and the slider structure may not be provided. Only through the docking connection between the docking pipe 12 and the dust collection device 3, while the dust collection device 3 drives the docking pipe 12 to move, the horizontal movement stability of the docking pipe 12 is ensured.

[0060] However, it can be understood that when the upper end of the docking pipe 12 extends into the working space 42, the upper end of the docking pipe 12 also needs to be connected to the docking hose 14 to ensure that the horizontal movement of the docking pipe 12 does not affect the docking between the dust exhaust docking device and the drain pipe.

[0061] Furthermore, the transmission assembly 13 further includes a guide wheel around which the pull rope 132 is wound. The setting of the guide wheel is beneficial to guiding the pull rope 132 and its moving direction, avoiding interference between the setting of the pull rope 132 and the dust collection device 3, and reducing the position requirements for the lever 131.

[0062] The guide wheel at least includes a first guide wheel 133 arranged above the second end of the pressing member 11. When the dust collection device 3 completely enters the cabin 41, the first guide wheel 133 is located above the dust collection device 3 or on the side away from the opening of the cabin 41, and the part of the pull rope 132 between the first guide wheel 133 and the second end of the pressing member 11 is located in front of the dust collection device 3, and the part of the pull rope 132 between the first guide wheel 133 and the lever 131 is located above the dust collection device 3. The setting of the first guide wheel 133 can prevent the setting of the pull rope 132 from hindering the entry of the dust collection device 3 into the cabin 41 and reduce the interference between the transmission assembly 13 and the dust collection device 3.

[0063] In this embodiment, the first end of the lever 131 is far from the opening of the chamber 41, and the second end of the lever 131 is close to the opening of the chamber 41. The guide wheel further includes a second guide wheel 134 disposed close to the opening of the chamber 41. The first end of the pull rope 132 sequentially bypasses the first guide wheel 133 and the second guide wheel 134 and is connected to the pull rope 132. Moreover, the height of the first guide wheel 133 from the bottom plate 411 of the chamber is greater than the sum of the height of the dust collection device 3 and the height of the pressing member 11, so that after the dust collection device 3 completely enters the chamber 41, the pull rope 132 between the first guide wheel 133 and the second guide wheel 134 is located above the dust collection device 3. The setting of the second guide wheel 134 can, in addition to changing the pulling force direction and reducing friction, increase the effective length of the pull rope 132 under the condition that the height of the chamber 41 remains unchanged, improve the force stability of the pull rope 132 and the movement stability of the lever 131, and at the same time can better relieve the impact.

[0064] Further, the first guide wheel 133 and the second guide wheel 134 are at the same height, which is convenient for installation and adjustment. More preferably, when the dust collection device 3 does not enter the chamber 41, that is, when the dust discharge docking device 1 is in the initial state, the part of the pull rope 132 between the second guide wheel 134 and the lever 131 is vertically arranged. Further preferably, in the initial state of the dust discharge docking device 1, the height of the first end of the lever 131 is lower than the height of the second end of the lever 131, reducing the torque required for the lever 131 to rotate relative to the docking pipe 12 and avoiding the problem of rotational jamming. When the dust discharge docking device 1 is in the docking state, the lever 131 is horizontally arranged to reduce the overall floor space occupied by the dust discharge docking device 1.

[0065] To enable the dust discharge docking device 1 to effectively return to the initial state after the dust collection device 3 exits the chamber 41, the docking dust removal device further includes an elastic reset member 15, and the elastic reset member 15 is used to reset the dust discharge docking device 1 from the docking state to the initial state.

[0066] In this embodiment, the elastic reset member 15 includes a tension spring. One end of the tension spring is connected to the top plate 412 of the chamber, and the other end of the tension spring is connected to the lever 131. Moreover, when the dust discharge docking device 1 is in the initial state, the tension spring is in the first stretched state, and when the dust discharge docking device 1 is in the docking state, the tension spring is in the second stretched state. The elongation length of the tension spring in the first stretched state is less than the elongation length of the tension spring in the second stretched state. This setting method can, when the dust discharge docking device 1 is in the initial state, enable the tension spring to provide an upward pulling force on the lever 131, ensuring the state stability of the lever 131 and thus maintaining the stability of the initial state of the dust discharge docking device 1; when the dust discharge docking device 1 is in the docking state, the tension spring provides a force for the second end of the lever 131 to flip upward and return, so that the lever 131 drives the docking pipe 12, the pull rope 132 and the pressing member 11 to return to the initial state.

[0067] Further, the distance between the docking pipe 12 and the second end of the lever 131 is less than the distance between the docking pipe 12 and the first end of the lever 131. The elastic reset member 15 is connected between the second end of the lever 131 and the docking pipe 12. With this arrangement, the force required to pull down the second end of the lever 131 can be reduced, so that when the dust removal device 3 enters the chamber 41 and presses down the pressing member 11, the elastic force of the elastic reset member 15 to be overcome is relatively small, thereby effectively reducing the resistance required for the dust suction device 3 to press down the pressing member 11 and improving the operation reliability and smoothness of the dust discharge docking device 1.

[0068] In another embodiment, the elastic reset member 15 may further include a compression spring acting on the second end of the pressing member 11, and the compression spring may be disposed between the second end and the bottom plate of the chamber 41. In still another embodiment, the elastic reset member 15 may further include a torsion spring sleeved on the mounting shaft 16. One end of the torsion spring is connected to the lever 131, and the other end of the torsion spring is connected to the docking pipe 12. The present invention does not limit the specific structure of the reset member and the structure on which it acts, as long as the elastic restoring force of the reset member can make the dust discharge docking device 1 return from the docking state to the initial state.

[0069] Figure 3 is a top view schematic diagram of the cleaning system provided by the embodiment of the present invention after the dust suction device and the cleaning device are docked, Figure 4 is a structural schematic diagram of the three-way joint provided by the embodiment of the present invention in the first conduction state, Figure 5 is a structural schematic diagram of the three-way joint provided by the embodiment of the present invention in the second conduction state, Figure 6 is a structural schematic diagram of the three-way joint provided by the embodiment of the present invention in the third conduction state. As Figures 3 - 6 shown, to ensure the selective communication between the docking pipe 12 and the drain pipe 43, a three-way joint 2 is provided between the docking hose 14 and the drain pipe 43. The three-way joint 2 includes a cavity 21 and a shutter disposed in the cavity 21. The cavity 21 includes a main body portion 211 and a bypass portion 212 that intersect and communicate with each other. The main body portion 211 is connected to the drain pipe 43 and has a first inlet and outlet and a second inlet and outlet; one end of the bypass portion 212 intersects and communicates with the side wall of the main body portion 211, and the intersection of the bypass portion 212 and the main body portion 211 forms an intersection opening that connects the main body portion 211 and the bypass portion 212. The other end of the bypass portion 212 forms a third inlet and outlet connected to the docking hose 14.

[0070] The three-way joint 2 further includes a first shutter 22 and a second shutter 23 for controlling the opening and closing of the fluid path. The first shutter 22 is disposed within the main body portion 211, and a first end of the first shutter 22 is hinged to the inner wall of the main body portion 211. The first shutter 22 is configured to close the confluence port when there is no fluid scouring effect in the bypass portion 212, and to open the confluence port and close the first inlet / outlet when there is a fluid scouring effect in the bypass portion 212. The second shutter 23 is disposed within the main body portion 211, and the second shutter 23 is configured to press a second end of the first shutter 22 against the inner wall of the main body portion 211 when the fluid flows from the second inlet / outlet to the first inlet / outlet.

[0071] With the above-described arrangement of the three-way joint 2, the three-way joint 2 can be switched between a first conducting state and a second conducting state: when the three-way joint 2 is in the first conducting state, the fluid flows into the bypass portion 212 from the third inlet / outlet of the bypass portion 212. The first shutter 22 opens the confluence port under the fluid scouring effect and closes the first inlet / outlet. The fluid flows in from the third inlet / outlet and out from the second inlet / outlet. When the three-way joint 2 is in the second conducting state, the bypass portion 212 is in a state of no fluid flow. The first shutter 22 closes the confluence port. The first inlet / outlet and the second inlet / outlet are in communication. And the second shutter 23 presses the second end of the first shutter 22 against the corresponding inner wall of the main body portion 211, so that while the fluid can flow from the second inlet / outlet to the first inlet / outlet, it can be ensured as much as possible that the fluid does not flow into the bypass portion 212 from the gap between the second end of the first shutter 22 and the inner wall of the main body portion 211, preventing the fluid from flowing back into the bypass portion 212 in the second conducting state and improving the reliability of use of the three-way joint 2.

[0072] In this embodiment, the first end of the first shutter 22 is located between the confluence port and the first inlet / outlet, and the second shutter 23 and the first end of the first shutter 22 are respectively located on opposite sides of the confluence port. With this arrangement, when there is fluid flowing from the first inlet / outlet to the second inlet / outlet in the three-way joint 2, the fluid can flow along the first shutter 22 towards the second inlet / outlet. The first shutter 22 is pressed against the inner wall of the cavity 21 under the action of the fluid flow pressure, preventing the fluid from flowing back into the bypass portion 212.

[0073] That is, in this embodiment, the three-way joint 2 has a first conducting state, a second conducting state, and a third conducting state: in the first conducting state, the first inlet / outlet is closed, and the fluid enters from the third inlet / outlet and flows through the confluence port to the second inlet / outlet; in the second conducting state, the confluence port is closed, and the fluid flows from the second inlet / outlet to the first inlet / outlet; in the third conducting state, the confluence port is closed, and the fluid flows from the first inlet / outlet to the second inlet / outlet.

[0074] In this embodiment, the second inlet / outlet is arranged close to the drainage outlet of the drain pipe 43. That is, the first conduction state is the dust exhaust state of the dust collection box 31, the second conduction state is the water return state of the drain pipe 43, and the third conduction state is the drainage state of the drain pipe 43. That is, the setting of the first shutter 22 and the second shutter 23 of the three-way joint 2 can avoid the water flowing back into the dust collection box 31 through the bypass portion 212 when the drain pipe 43 is in the water return state, affecting the normal use of the dust collection box 31 and even the suction device 3, and improving the use safety and reliability of the cleaning system while ensuring that the dust collection box 31 can be dusted through the drain pipe 43.

[0075] Further, to ensure the automatic sealing of the second end of the first shutter 22 by the second shutter 23, the first end of the second shutter 23 is hinged to the inner wall of the main body portion 211, and the second end of the second shutter 23 is in a free state, so that the second end of the second shutter 23 can flip in a direction away from or towards the confluence; and the sum of the lengths of the first shutter 22 from its first end to its second end and the second shutter 23 from its first end to its second end is greater than the distance between the first end of the first shutter 22 and the first end of the second shutter 23. Under this setting, the second shutter 23 can flip under the scouring action of the fluid entering from the second inlet / outlet to press against the second end of the first shutter 22, making the structure of the second shutter 23 simple, easy to set, with low cost, without the need for additional control structures or driving structures to drive the operation, and can ensure the operation reliability of the second shutter 23. At the same time, this setting can guide the fluid entering from the second inlet / outlet while closing the gap between the second end of the second shutter 23 and the main body portion 211, so that the fluid flows along the second shutter 23, and further forms a fluid-free flow area between the second end of the second shutter 23 and the second end of the first shutter 22, further preventing the fluid from flowing back into the bypass portion 212.

[0076] In this embodiment, the main body portion 211 has a straight pipe structure, and its first inlet / outlet and second inlet / outlet are arranged opposite to each other. In other embodiments, the main body portion 211 can also be arranged in an L shape or other forms, as long as a straight pipe section is ensured for the section of the main body portion 211 close to the first inlet / outlet, the confluence, the first shutter 22 and the second shutter 23 are all arranged at the straight pipe section, and the first end of the first shutter 22 and the first end of the second shutter 23 are respectively located on opposite sides of the confluence along the length direction of the straight pipe section.

[0077] Further, the second shutter 23 extends obliquely in the direction towards the second inlet / outlet from its first end to its second end. With this setting, when the three-way joint 2 is in the third conduction state, the second shutter 23 can flip in a direction away from the confluence under the scouring action of the fluid entering from the first inlet / outlet, thereby being able to enlarge the effective outlet size of the second inlet / outlet, reduce the flow resistance of the second shutter 23 to the fluid, and ensure the smooth drainage of the drain pipe 43.

[0078] To ensure that the gas carrying dust can be discharged more smoothly under the dust extraction state, the bypass portion 212 extends obliquely from the third inlet / outlet to the confluence port in the direction towards the second inlet / outlet. With this setting, when the three-way joint 2 is in the first conduction state, the fluid path formed between the third inlet / outlet and the second inlet / outlet is generally a V-shaped structure with an angle greater than 90°, thereby improving the smoothness of fluid flow and preventing impurities such as dust from staying at the corners of the fluid channel.

[0079] Furthermore, when the first shutter 22 is in the initial installation state, the first shutter 22 blocks the confluence port. When the first shutter 22 blocks the first inlet / outlet, the first shutter 22 inclines relative to the central axis of the main body portion 121 from the first end to the second end in the direction away from the first inlet / outlet, so that the first conduction path can be closer to the V-shaped structure, reducing the corners of the first conduction path and improving the smoothness of fluid flow.

[0080] Furthermore, the angle between the bypass portion 212 and the main body portion 211 is a first acute angle. When the three-way joint 2 is in the first conduction state, the angle between the first shutter 22 and the central axis of the main body portion 211 is a second acute angle, and both the first acute angle and the second acute angle are 30° - 50°. Preferably, the first acute angle is greater than or equal to the second acute angle to further guide the fluid to flow to the second inlet / outlet, expand the corner angle of the V-shaped structure, and minimize the retention of dust at the corners of the V-shaped structure.

[0081] To further prevent water from entering the bypass portion 212, a third shutter 24 is also provided in the bypass portion 212. In the initial installation state, the third shutter 24 closes and blocks the connection between the third inlet / outlet and the confluence port. When there is fluid entering the bypass portion 212 from the third inlet / outlet, the third shutter 24 conducts the connection between the third inlet / outlet and the confluence port. By providing the third shutter 24, it can be further ensured that no water enters the bypass portion 212 in the second conduction state and the third conduction state, further ensuring the effective operation of the dust suction device 3.

[0082] In this embodiment, the first end of the third shutter 24 is hinged to the inner wall of the bypass portion 212, and the second end of the third shutter 24 is in a free state, so that the third shutter 24 can be automatically opened under the scouring action of the fluid, with a simple structure and convenient setting. Moreover, further, when the third shutter 24 blocks the third inlet / outlet and the confluence port, the third shutter 24 is perpendicular to the central axis of the bypass portion 212 to improve the opening and closing smoothness of the third shutter 24.

[0083] To ensure that each shutter can maintain its initial installed state without fluid scouring and can return to its initial installed state after fluid scouring, elastic members for resetting are provided on both the first shutter 22 and the third shutter 24. Preferably, the elastic member is a torsion spring sleeved on the hinge shaft 25 of the corresponding shutter. One end of the torsion spring is connected to the inner wall of the three-way joint 2, and the other end of the torsion spring is connected to the corresponding shutter. The initial torque of the torsion springs on the first shutter 22 and the third shutter 24 should be set according to the specific usage requirements of each shutter. Further, the second shutter 23 is in a free swing and stop state, simplifying the structural arrangement of the second shutter 23.

[0084] Further, the installation force of the elastic member at the third shutter 24 is preferably such that the dust collection device 3 in the working state opens the third shutter 24 by a certain gap. This can make the air pressure at the third shutter 24 high and the air flow rapid, so that dust is not easily accumulated, and can further prompt the air flow carrying dust to flow towards the second inlet and outlet, rather than flowing to the first inlet and outlet. At the same time, the initial torque of the torsion spring corresponding to the first shutter 22 can be set to control the fluid pressure required to open the first shutter 22, so as to ensure that the first shutter 22 will not be opened when there is fluid flow in the main body portion 211.

[0085] This setting of the force of the elastic member ensures that when the cleaning device drains or returns water, the first shutter 22 cannot be opened due to the resistance of the water pressure, thus ensuring that water will not flow back into the dust collection device. Thus, after the dust collection device 3 enters the cabin 41, the dust removal operation can be started at any time. And when dust is removed and if it happens to encounter the cleaning device 4 draining or returning water, the first shutter 22 cannot reach the fluid pressure required to open the first shutter 22 due to the internal and external fluid pressure difference, causing the air pressure inside the bypass portion 212 to increase, and then triggering the safety mechanism of the dust collection device 3 itself to stop the dust removal work. The drainage time of the cleaning device usually does not exceed 5 minutes. And the water return does not exceed 1 minute. Thus, the preset stop time after the accidental interruption of the dust removal of the dust collection device 3 can be set to control the timing of the next dust removal operation of the dust collection device 3. For example, the preset stop time can be set to 6 minutes.

[0086] In another embodiment, the dust removal timing of the dust collection device 3 can also be detected by setting a pressure detection device to detect the fluid pressure in the main body portion 211 and / or the bypass portion 212. At this time, the cleaning system further includes a pressure detection device and a controller. The pressure detection device is used to detect the fluid pressure in the main body portion 211 and / or the bypass portion 212. The pressure detection device and the dust collection device 3 are both connected to the controller. When the fluid pressure is greater than the set value and the docking hose 14 is docked with the dust outlet, it is determined that the drain pipe 43 is in the process of draining water, and thus the dust collection device 3 is controlled to stop the dust removal operation.

[0087] In this embodiment, the cross-section of the main body portion 211 and the bypass portion 212 at least at the confluence is a rectangular structure, and both the first shutter 22 and the third shutter 24 are in the shape of a rectangular plate, which facilitates the structural arrangement of the first shutter 22 and the third shutter 24 and is conducive to the sealing of the first shutter 22 and the third shutter 24. In other embodiments, the main body portion 211 and the bypass portion 212 may also adopt other round tubes or other tubular structures, as long as it is ensured that the structures of the first shutter 22 and the third shutter 24 can be hermetically fitted with the inner walls of the corresponding tubes.

[0088] Furthermore, to improve the operational reliability of the cleaning system, a charging module for charging the dust suction device is also provided in the chamber 41. Thus, each time the dust suction device 3 enters the chamber 41 for dust discharge, it can also be charged, ensuring the normal and effective operation of the dust suction device 3. At the same time, the chamber 41 can also be used as a waiting point for the dust suction device 3 in the non-working state, improving the storage performance of the cleaning system and providing better protection for the dust suction device 3, preventing the dust suction device 3 from being stepped on or kicked by the members of the user's family in the non-working state.

[0089] It can be understood that the structure of the three-way joint 2 provided in this embodiment can be applied not only to the above-mentioned cleaning system but also to other pipeline systems that require fluid commutation. The present invention does not specifically limit the application scenarios of the three-way joint 2.

[0090] Note that the above is only the preferred embodiment of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A tee joint, characterized in that, Comprising: A cavity (21), the cavity (21) includes a main body portion (211) and a bypass portion (212) that intersect and communicate. The main body portion (211) has a first inlet and outlet and a second inlet and outlet. One end of the bypass portion (212) forms a third inlet and outlet, and the other end of the bypass portion (212) is connected to the side wall of the main body portion (211) and forms a junction opening; A first shutter (22), disposed within the main body portion (211), and a first end of the first shutter (22) is hinged to the inner wall of the main body portion (211). The first shutter (22) is configured to close the junction opening when there is no fluid scouring effect in the bypass portion (212), and to open the junction opening and close the first inlet and outlet when there is a fluid scouring effect within the bypass portion (212); A second shutter (23), disposed within the main body portion (211), and the second shutter (23) is configured to press a second end of the first shutter (22) against the inner wall of the main body portion (211) when fluid flows from the second inlet and outlet to the first inlet and outlet.

2. The tee joint according to claim 1, characterized in that, The first end of the first shutter (22) is located between the junction opening and the first inlet and outlet, and the second shutter (23) and the first end of the first shutter (22) are respectively located on opposite sides of the junction opening.

3. The tee joint according to claim 2, characterized in that, The first end of the second shutter (23) is hinged to the inner wall of the main body portion (211), and the second end of the second shutter (23) is in a free state, so that the second end of the second shutter (23) can flip in a direction away from or towards the junction opening; the sum of the lengths of the first shutter (22) from its first end to its second end and the second shutter (23) from its first end to its second end is greater than the distance between the first end of the first shutter (22) and the first end of the second shutter (23).

4. The three-way joint according to claim 2, characterized in that, The bypass portion (212) is inclinedly connected to the main body portion (211), and the bypass portion (212) extends obliquely in a direction away from the first inlet and outlet from the direction of the third inlet and outlet to the junction opening.

5. The tee joint according to claim 4, characterized in that, In the initial installation state of the first shutter (22), the first shutter (22) blocks the junction opening. When the first shutter (22) blocks the first inlet and outlet, the first shutter (22) inclines relative to the central axis of the main body portion (211) in a direction away from the first inlet and outlet along its first end to its second end.

6. The tee joint according to claim 5, wherein, The included angle between the bypass portion (212) and the main body portion (211) is a first acute angle. When the first shutter (22) blocks the first inlet and outlet, the included angle between the first shutter (22) and the central axis of the main body portion (211) is a second acute angle, and the first acute angle is greater than or equal to the second acute angle.

7. The tee joint according to any one of claims 1-6, characterized in that, The three-way joint further includes a third shutter (24), and the third shutter (24) is located inside the bypass portion (212); the third shutter (24) is configured to block the third inlet / outlet and the confluence when no fluid enters the third inlet / outlet, and to conduct the third inlet / outlet and the confluence when fluid enters the third inlet / outlet.

8. The tee joint according to claim 7, characterized in that, Elastic members for keeping the corresponding shutter in the initial installation state or restoring it to the initial installation state are respectively provided for the first shutter (22) and the third shutter (24), and the second shutter (23) is arranged to freely swing and stop.

9. A cleaning system, characterized in that, Comprising: A dust collection device (3) and a cleaning device, the cleaning device includes a drain pipe (43), the drain pipe (43) has a drain port communicating with the outside, the dust collection device (3) includes a dust collection box (31), the cleaning system further includes a docking pipe (12) and a three-way joint as described in any one of claims 1-7, one end of the docking pipe (12) is communicated with the dust discharge port of the dust collection box (31), the other end of the docking pipe (12) is hermetically communicated with the bypass portion (212), the main body portion (211) is hermetically connected to the drain pipe (43), and the second inlet / outlet is located at one end facing the drain port.

10. The cleaning system according to claim 9, characterized in that, The cleaning system further includes a pressure detection device and a controller. The pressure detection device is used to detect the fluid pressure in the main body portion (211) and / or the bypass portion (212). The pressure detection device is connected to the controller. When the docking pipe (12) is docked with the dust discharge port and the detected value of the pressure detection device is greater than a preset value, the controller controls the dust collection device (3) to stop the dust collection operation.

Images