Pipe connection structure and laundry washing apparatus

Abstract

The present disclosure relates to a pipe connection structure and a laundry washing apparatus, wherein the pipe connection structure comprises a first flow channel, a second flow channel and a third flow channel, the first flow channel is used to be connected with a water outlet end of a first pipe of the laundry washing apparatus, the second flow channel is used to be connected with a water inlet end of a second pipe of the laundry washing apparatus, and the third flow channel is used to be connected with a vent pipe of the laundry washing apparatus, the second flow channel comprises a first sub-flow channel with a smaller diameter than the first flow channel, the first sub-flow channel is connected with the first flow channel, and the first sub-flow channel is connected with the third flow channel, and a non-gradual transition is formed between the first flow channel and the first sub-flow channel. The non-gradual transition between the first flow channel and the first sub-flow channel of the pipe connection structure of the present disclosure can reduce the pressure of the first sub-flow channel to a greater extent, thereby being conducive to further increasing the resistance of water flowing from the first sub-flow channel into the third flow channel, and thereby being conducive to further reducing the risk of water being diverted by the third flow channel.

Description

Technical Field

[0001] This disclosure relates to the field of clothing washing equipment technology, specifically to a pipe connection structure and clothing washing equipment. Background Technology

[0002] Laundry equipment typically includes a water inlet valve and a water-using device. The water inlet valve delivers water from an external water source to the water-using device through pipes to meet its water needs. However, when the water pressure from the external water source fluctuates or the water inlet valve malfunctions, a siphon effect may occur in the pipes, causing water in the water-using device to be drawn back into the pipes, the water inlet valve, and the external water source. Since the water in the water-using device has already come into contact with or mixed with the laundry or detergent, the backflowed water may contaminate the pipes, the water inlet valve, and the external water source. Current solutions to this problem are not ideal. Utility Model Content

[0003] The purpose of this disclosure is to provide a pipe connection structure and a laundry washing device to at least partially solve the technical problems existing in the related art.

[0004] To achieve the above objectives, according to a first aspect of this disclosure, a pipe fitting connection structure is provided, comprising:

[0005] The first flow channel is used to connect to the outlet end of the first pipe of the laundry washing equipment;

[0006] The second flow channel is used to connect to the water inlet end of the second pipe of the laundry washing equipment;

[0007] The third flow channel is used to connect to the air duct of the laundry washing equipment;

[0008] The second flow channel includes a first sub-flow channel with a diameter smaller than that of the first flow channel. The first sub-flow channel is connected to the first flow channel and is also connected to the third flow channel.

[0009] The transition between the first flow channel and the first sub-flow channel is non-gradual.

[0010] Optionally, the second flow channel further includes a second sub-flow channel, wherein the outlet end of the first sub-flow channel is connected to the inlet end of the second sub-flow channel;

[0011] The diameter of the outlet end of the first sub-channel is smaller than the diameter of the outlet end of the second sub-channel.

[0012] Optionally, the diameter of the inlet end of the second sub-channel is equal to the diameter of the outlet end of the first sub-channel;

[0013] The second sub-channel is constructed to gradually expand from its inlet end to its outlet end.

[0014] Optionally, the two ends of the first sub-channel along its own extension direction are connected to the first channel and the second sub-channel, respectively;

[0015] The first sub-channel is connected to the third channel at its middle section along its extension direction.

[0016] Optionally, the second flow channel further includes a third sub-flow channel, the inlet of which is connected to the outlet of the second flow channel section;

[0017] Along the extension direction of the third sub-channel, the cross-section of the third sub-channel is the same at all points.

[0018] Optionally, the cross-section of the first sub-channel is the same at all points along its extension direction; and / or,

[0019] Along the extension direction of the first flow channel, the cross-section of the first flow channel is the same at all points.

[0020] Optionally, there are multiple first flow channels, and each of the multiple first flow channels is connected to a corresponding first pipeline;

[0021] There are multiple second flow channels, and each of the multiple second flow channels is connected to a corresponding second pipeline.

[0022] Optionally, a plurality of first flow channels and a plurality of second flow channels are connected to the venting duct via a common third flow channel.

[0023] Optionally, each of the second flow channels includes a first sub-flow channel, and the diameters of the first sub-flow channels of at least two of the plurality of second flow channels are different.

[0024] Optionally, the pipe fitting connection structure further includes a fourth flow channel;

[0025] One end of the fourth flow channel is used to connect to the water outlet of the third pipe of the laundry equipment;

[0026] The other end of the fourth flow channel is used to connect to the water inlet of the fourth pipe of the laundry washing equipment;

[0027] The fourth flow channel is connected to the third flow channel via a connecting flow channel;

[0028] The first end of the connecting channel is connected to the fourth channel, and the lowest position of the first end of the connecting channel is spaced at a preset height from the bottom wall of the fourth channel. The preset height is greater than or equal to the water level in the fourth channel.

[0029] Optionally, the diameter of the connecting channel is smaller than the diameter of the third channel.

[0030] Optionally, the cross-section of the fourth flow channel is the same at all points along its extension direction.

[0031] Optionally, the pipe fitting connection structure includes a main body, a first branch pipe, and a second branch pipe, wherein the first branch pipe and the second branch pipe are respectively connected to the main body;

[0032] The first branch pipe is used to connect to the first pipeline, and the first flow channel includes the flow channel defined by the inner peripheral wall of the first branch pipe;

[0033] The second branch pipe is used to connect to the second pipeline, and the second flow channel includes the flow channel defined by the inner peripheral wall of the second branch pipe and the first sub-flow channel located within the main body.

[0034] Optionally, the pipe fitting connection structure further includes a fourth flow channel, a third branch pipe, and a fourth branch pipe;

[0035] One end of the fourth flow channel is used to connect to the water outlet of the third pipe of the laundry equipment;

[0036] The other end of the fourth flow channel is used to connect to the water inlet of the fourth pipe of the laundry washing equipment;

[0037] The fourth flow channel is connected to the third flow channel via a connecting flow channel;

[0038] The third branch pipe and the fourth branch pipe are respectively connected to the main body;

[0039] The fourth flow channel includes the flow channel defined by the inner peripheral wall of the third branch pipe, the flow channel defined by the inner peripheral wall of the fourth branch pipe, and the flow channel located within the main body.

[0040] According to a second aspect of this disclosure, a laundry washing apparatus is provided, including a first pipeline, a second pipeline, a venting pipeline, and the aforementioned pipe fitting connection structure;

[0041] The outlet of the first pipe is connected to the first flow channel, the inlet of the second pipe is connected to the second flow channel, and the vent pipe is connected to the third flow channel.

[0042] Optionally, the pipe fitting connection structure further includes a fourth flow channel, which is connected to the third flow channel via a connecting flow channel;

[0043] The laundry equipment also includes a third pipeline and a fourth pipeline;

[0044] One end of the fourth flow channel is connected to the outlet end of the third pipe, and the other end of the fourth flow channel is connected to the inlet end of the fourth pipe.

[0045] Optionally, the pipe fitting connection structure is arranged horizontally, and the fourth flow channel extends in the horizontal direction;

[0046] The first end of the connecting channel is connected to the fourth channel, and the lowest position of the first end of the connecting channel is spaced at a preset height from the bottom wall of the fourth channel. The preset height is greater than or equal to the water level in the fourth channel.

[0047] Optionally, the laundry washing equipment further includes a water inlet valve, and the water inlet end of the first pipeline is connected to the water inlet valve; and / or,

[0048] The laundry equipment further includes a washing drum, and the outlet end of the second pipe is connected to the washing drum; and / or,

[0049] The laundry equipment also includes a washing box, and the ventilation pipe is connected to the washing box.

[0050] In this application, during use, the first flow channel can be connected to the water outlet of the first pipe of the laundry equipment, and the second flow channel can be connected to the water inlet of the second pipe of the laundry equipment. This allows water from the first pipe to flow into the second pipe through the first and second flow channels of the pipe fitting connection structure, i.e., water from the inlet valve can flow into the water-using device through the pipe fitting connection structure. Furthermore, the third flow channel can be connected to the vent pipe of the laundry equipment, allowing the gas in the vent pipe to promptly balance the pressure of the first and second pipes, thereby helping to avoid a siphon effect in the pipes.

[0051] Compared with the related technology of connecting a gas path in the pipeline between the water inlet and the water-using device, the pipe connection structure provided in this disclosure includes a first sub-channel with a diameter smaller than that of the first channel. The first sub-channel is connected to both the first channel and the third channel. Therefore, when water flows from the first channel into the second sub-channel, the flow velocity increases and the pressure decreases. Furthermore, since the transition between the first channel and the first sub-channel is non-gradual, the pressure in the first sub-channel can be reduced to a greater extent compared to other transition methods. This helps to further increase the resistance of water flowing from the first sub-channel into the third channel, thereby further reducing the risk of water being diverted by the third channel. In addition, it can also reduce the resistance of gas from the venting pipeline entering the first sub-channel through the third channel, thereby improving the anti-siphon capability of the first and second pipelines.

[0052] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0053] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0054] Figure 1 This is a partial top view of the interior of a laundry washing apparatus provided in one embodiment of the present disclosure.

[0055] Figure 2 This is a three-dimensional structural diagram of a pipe connection structure provided in one embodiment of the present disclosure.

[0056] Figure 3 This is a cross-sectional schematic diagram of a pipe fitting connection structure provided in one embodiment of the present disclosure.

[0057] Figure 4 This is a three-dimensional structural diagram of a pipe connection structure provided in another embodiment of this disclosure.

[0058] Figure 5 This is a cross-sectional schematic diagram of a pipe connection structure provided in another embodiment of this disclosure.

[0059] Explanation of reference numerals in the attached figures

[0060] 1000 - Laundry washing equipment; 100 - Pipe connection structure; 10 - First flow channel; 20 - Second flow channel; 21 - First sub-flow channel; 22 - Second sub-flow channel; 23 - Third sub-flow channel; 30 - Third flow channel; 40 - Fourth flow channel; 50 - Connecting flow channel; 60 - Main body; 71 - First branch pipe; 72 - Second branch pipe; 73 - Third branch pipe; 74 - Fourth branch pipe; 1001 - First pipeline; 1002 - Second pipeline; 1003 - Third pipeline; 1004 - Fourth pipeline; 1005 - Vent pipeline; 200 - Water inlet valve. Detailed Implementation

[0061] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0062] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally defined as upper, lower, top, and bottom of the laundry washing equipment under normal operating conditions (see reference for details). Figure 1 As shown, Figure 1The viewpoint is a top-down perspective and is used only for the purpose of describing this disclosure and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or a specific orientation construction and operation, and therefore should not be construed as a limitation of this disclosure. "Inner" and "outer" refer to the inner and outer contours of the corresponding components. In addition, the terms "first," "second," etc., are used to distinguish one element from another and do not have any sequential or important meaning.

[0063] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0064] Studies have found that related technologies typically involve installing one-way valves in pipelines or connecting air bypasses to balance pressure changes and prevent siphoning. However, one-way valves are prone to failure, and bypass air bypasses divert water from the inlet valve to the water-using device, reducing the flow rate and wasting water. Therefore, both one-way valves and bypass air bypasses are ineffective in preventing siphoning and can have significant negative impacts.

[0065] In view of this, such as Figures 1 to 5 As shown, according to a first aspect of this disclosure, a pipe connection structure 100 is provided, including a first flow channel 10, a second flow channel 20, and a third flow channel 30. The first flow channel 10 is used to connect to the water outlet of a first pipe 1001 of a laundry washing device 1000. The second flow channel 20 is used to connect to the water inlet of a second pipe 1002 of the laundry washing device 1000. The third flow channel 30 is used to connect to a vent pipe 1005 of the laundry washing device 1000. The second flow channel 20 includes a first sub-flow channel 21 with a diameter smaller than that of the first flow channel 10. The first sub-flow channel 21 is connected to the first flow channel 10 and to the third flow channel 30. The first flow channel 10 and the first sub-flow channel 21 are not in a gradual transition.

[0066] In this application, when using the pipe connection structure 100, the first flow channel 10 can be connected to the water outlet of the first pipe 1001 of the laundry washing equipment 1000, and the second flow channel 20 can be connected to the water inlet of the second pipe 1002 of the laundry washing equipment 1000. This allows water from the first pipe 1001 to flow into the second pipe 1002 through the first flow channel 10 and the second flow channel 20 of the pipe connection structure 100, that is, water from the water inlet valve 200 can flow into the water-using device through the pipe connection structure 100. Furthermore, the third flow channel 30 can be connected to the vent pipe 1005 of the laundry washing equipment 1000, so that the gas in the vent pipe can timely balance the pressure in the first pipe 1001 and the second pipe 1002, thereby helping to avoid the siphon effect in the pipes.

[0067] Compared with the related technology of connecting a gas path in the pipeline between the water inlet and the water-using device, the second flow channel 20 of the pipe connection structure 100 provided in this disclosure includes a first sub-flow channel 21 with a diameter smaller than that of the first flow channel 10. The first sub-flow channel 21 is connected to both the first flow channel 10 and the third flow channel 30. Therefore, when water flows from the first flow channel 10 into the second sub-flow channel 22, the flow velocity increases and the pressure decreases. Furthermore, since the transition between the first flow channel 10 and the first sub-flow channel 21 is not gradual, the pressure of the first sub-flow channel 21 can be reduced to a greater extent compared with other transition methods. This is beneficial to further increase the resistance of water flowing from the first sub-flow channel 21 into the third flow channel 30, thereby further reducing the risk of water being diverted by the third flow channel 30. In addition, it can also reduce the resistance of gas from the vent pipe 1005 entering the first sub-flow channel 21 through the third flow channel 30, thereby improving the anti-siphon capability of the first pipe 1001 and the second pipe 1002.

[0068] Here, the first pipe 1001 may be a pipe connected to the water inlet valve 200 of the laundry washing equipment 1000, the second pipe 1002 may be a pipe connected to the water supply device of the laundry washing equipment 1000, and the vent pipe 1005 may be a pipe connected to the outside. This disclosure does not limit this.

[0069] For example, when the ventilation pipe 1005 is a pipe connected to the outside, the gas in the ventilation pipe 1005 can be outside air.

[0070] It is understood that the pipe connection structure 100 of this disclosure is not limited to use on the laundry washing equipment 1000, but can be used on any equipment to which the pipe connection structure 100 of this disclosure is applicable.

[0071] Optionally, such as Figure 3 and Figure 5As shown, the second flow channel 20 also includes a second sub-flow channel 22. The outlet end of the first sub-flow channel 21 is connected to the inlet end of the second sub-flow channel 22. The diameter of the outlet end of the first sub-flow channel 21 is smaller than the diameter of the outlet end of the second sub-flow channel 22.

[0072] Since the diameter of the outlet end of the first sub-channel 21 is smaller than the diameter of the outlet end of the second sub-channel 22, the pressure of the water in the first sub-channel 21 will increase after flowing through the second sub-channel 22. This will help to increase the pressure drop of the first sub-channel 21 relative to the third channel 30, and will also help to increase the water supply pressure of the second pipeline 1002.

[0073] To reduce the resistance to water flow within the second sub-channel 22, as one implementation method, such as Figure 3 and Figure 5 As shown, the second sub-channel 22 is constructed to gradually expand from its own inlet end to its own outlet end.

[0074] This design allows the water flow to gradually change with the pressure and velocity within the second sub-channel 22, which can improve the stability of the water flow and reduce the impact of the water flow on the inner wall of the second sub-channel 22. On the one hand, it helps to reduce the energy loss of the water flow within the second sub-channel 22; on the other hand, it helps to reduce the noise generated when the water flows within the second sub-channel 22; and furthermore, it helps to reduce the wear caused by the water flow on the second sub-channel 22.

[0075] To reduce the resistance when water flows from the first sub-channel 21 into the second sub-channel 22, as one implementation method, such as Figure 3 and Figure 5 As shown, the diameter of the inlet end of the second sub-channel 22 is equal to the diameter of the outlet end of the first sub-channel 21.

[0076] Since the diameter of the inlet end of the second sub-channel 22 is equal to the diameter of the outlet end of the first sub-channel 21, water will not be obstructed when flowing from the first sub-channel 21 into the second sub-channel 22, which helps to reduce the resistance when water flows from the first sub-channel 21 into the second sub-channel 22.

[0077] Furthermore, since the flow area between the first sub-channel 21 and the second sub-channel 22 does not suddenly expand, the water flow can move continuously along the inner wall of the first sub-channel and the inner wall of the second sub-channel 22, which helps to reduce the impact of the water flow on the inner wall of the second sub-channel 22.

[0078] As another implementation, the diameter of the outlet end of the second sub-channel 22 can also be larger than the diameter of the outlet end of the first sub-channel 21.

[0079] Optionally, such as Figure 3 and Figure 5As shown, the first sub-channel 21 is connected to the first channel 10 and the second sub-channel 22 at both ends along its own extension direction, and the first sub-channel 21 is connected to the third channel 30 at the middle part along its own extension direction.

[0080] This configuration allows the first flow channel 10 and the second sub-flow channel 22 to both be connected to the flow path of the first sub-flow channel 21 with the least resistance, and the third flow channel 30 to be connected to the flow path of the first sub-flow channel 21 with the greater resistance. This helps to reduce the resistance of water flowing from the first flow channel 10 into the second sub-flow channel 22 and increases the resistance of water flowing from the first sub-flow channel 21 into the third flow channel 30, thereby helping to prevent water from being diverted by the third flow channel 30.

[0081] Optionally, such as Figure 3 and Figure 5 As shown, the second flow channel 20 also includes a third sub-flow channel 23. The inlet end of the third sub-flow channel 23 is connected to the outlet end of the second flow channel 20. Along the extension direction of the third sub-flow channel 23, the cross-section of the third sub-flow channel 23 is the same at all points.

[0082] Since the cross-section of the third sub-channel 23 is the same at all points along its extension direction, the third sub-channel 23 can stabilize the water flow, allowing the water flowing out of the second sub-channel 22 to be stabilized in the third sub-channel 23 before flowing into the second pipe 1002. This helps to reduce the impact of the water flow on the second pipe 1002, thereby reducing the noise generated by the water flow in the second pipe 1002 and reducing the wear caused by the water flow on the second pipe 1002.

[0083] To reduce the resistance when water flows from the second sub-channel 22 into the third sub-channel 23, as one implementation method, such as Figure 3 and Figure 5 As shown, the diameter of the outlet end of the third sub-channel 23 is equal to the diameter of the outlet end of the second sub-channel 22.

[0084] Since the diameter of the inlet end of the third sub-channel 23 is equal to the diameter of the outlet end of the second sub-channel 22, water will not be obstructed when flowing from the second sub-channel 22 into the third sub-channel 23, which helps to reduce the resistance when water flows from the second sub-channel 22 into the third sub-channel 23.

[0085] Furthermore, since the flow area between the second sub-channel 22 and the third sub-channel 23 does not suddenly expand, the water flow can move continuously along the inner wall of the second sub-channel 22 and the inner wall of the third sub-channel 23, thereby helping to reduce the impact of the water flow on the inner wall of the third sub-channel 23.

[0086] As another implementation, the diameter of the outlet end of the third sub-channel 23 can also be larger than the diameter of the outlet end of the second sub-channel 22.

[0087] This disclosure does not limit the construction of the first sub-channel 21. As one embodiment, such as Figure 3 and Figure 5 As shown, the cross-section of the first sub-channel 21 is the same at all points along the extension direction of the first sub-channel 21.

[0088] The first sub-channel 21 is constructed in this way, which on the one hand helps to reduce the difficulty of processing and forming the first sub-channel 21, and on the other hand helps to improve the controllability of the pressure and flow rate of water under different working conditions in the first sub-channel 21, thereby helping to ensure that there is a sufficient pressure difference between the first sub-channel 21 and the third channel 30.

[0089] As another embodiment of this disclosure, the cross-section of the first sub-channel 21 can gradually change along the extending direction of the first sub-channel 21.

[0090] This disclosure does not limit the construction of the first flow channel 10. As one embodiment, such as Figure 3 and Figure 5 As shown, the cross-section of the first flow channel 10 is the same at all points along the extension direction of the first flow channel 10.

[0091] The first flow channel 10 is constructed in this way, which on the one hand helps to reduce the difficulty of processing and forming the first flow channel 10, and on the other hand helps to improve the controllability of the pressure and velocity of the water flow under different working conditions in the first flow channel 10. This helps to improve the controllability of the pressure and velocity of the water flow after entering the first sub-flow channel 21, and thus helps to ensure that there is a sufficient pressure difference between the first sub-flow channel 21 and the third flow channel 30.

[0092] As another embodiment of this disclosure, the cross-section of the first flow channel 10 can gradually change along the extending direction of the first flow channel 10.

[0093] In this disclosure, the number of the first flow channel 10 and the second flow channel 20 can be set to any suitable number, and this disclosure does not limit this. As one embodiment, such as Figure 3 As shown, there are multiple first flow channels 10, each connected to a corresponding first pipe 1001. Similarly, there are multiple second flow channels 20, each connected to a corresponding second pipe 1002. For example, as... Figure 3 In the embodiment shown, the number of the first flow channel 10 and the second flow channel 20 can both be set to two.

[0094] This configuration allows the pipe connection structure 100 to serve as a connection structure for multiple pipes, and enables the water flowing through the pipe connection structure 100 to have anti-siphon capability, thereby facilitating the connection and arrangement of the pipes of the laundry equipment 1000, and further enabling the laundry equipment 1000 to achieve more functions through multiple pipes.

[0095] In other embodiments of this disclosure, the number of the first flow channel 10 and the second flow channel 20 may also be set to one.

[0096] As one implementation method, such as Figure 3 As shown, multiple first flow channels 10 and multiple second flow channels 20 are connected to the ventilation duct 1005 through a common third flow channel 30.

[0097] This configuration allows multiple water passages flowing through the pipe fitting connection structure 100 to have anti-siphon capability when a third flow channel 30 is set up. This helps to save the number of third flow channels 30 and vent pipes 1005, and also allows the pipe fitting connection structure 100 to have a smaller volume, which helps to save costs and reduce the space occupied by pipe fittings and vent pipes 1005.

[0098] It is understood that different water paths can be controlled to flow water in stages, thereby reducing the mutual influence between different first sub-channels 21, or different water paths can be controlled to flow water synchronously, thereby improving the operating efficiency of the laundry washing equipment 1000. This disclosure does not limit this.

[0099] In this disclosure, different second flow channels 20 can be set to any suitable diameter according to actual needs. Each second flow channel 20 includes a first sub-flow channel 21, and the diameters of the first sub-flow channels 21 of at least two of the multiple second flow channels 20 are different.

[0100] Since the diameters of the first sub-channels 21 of at least two of the multiple second channels 20 are different, at least two second sub-channels 22 have different flow areas, so that at least two second channels 20 can respectively meet the needs of water passages with different flow rates, thereby making the pipe connection structure 100 suitable for water passages with different flow rates.

[0101] Here, it is understood that the first sub-channels 21 of different diameters can be connected to the third channel 30 at any suitable position. For example, the first sub-channel 21 with a larger diameter can be connected to the third channel 30 at a position closer to the venting pipe 1005, or the first sub-channel 21 with a smaller diameter can be connected to the third channel 30 at a position closer to the venting pipe 1005. This disclosure does not limit this.

[0102] Optionally, such as Figure 5As shown, the pipe connection structure 100 also includes a fourth flow channel 40. One end of the fourth flow channel 40 is connected to the outlet of the third pipe 1003 of the laundry washing equipment 1000, and the other end of the fourth flow channel 40 is connected to the inlet of the fourth pipe 1004 of the laundry washing equipment 1000. The fourth flow channel 40 and the third flow channel 30 are connected through a connecting flow channel 50. The first end of the connecting flow channel 50 is connected to the fourth flow channel 40, and the lowest point of the first end of the connecting flow channel 50 is spaced at a predetermined height from the bottom wall of the fourth flow channel 40. The predetermined height is greater than or equal to the water level in the fourth flow channel 40. The second end of the connecting flow channel 50, opposite to the first end, can be connected to the third flow channel 30.

[0103] Because the lowest point of the first end of the connecting channel 50 is spaced at a preset height from the bottom wall of the fourth channel 40, and this preset height is greater than or equal to the water level in the fourth channel 40, this configuration allows the fourth channel 40 to have anti-siphon capability. Furthermore, since the water level in the fourth channel 40 is not higher than the lowest point of the first end connecting the connecting channel 50 and the fourth channel 40, the water in the fourth channel 40 will not submerge the connecting channel 50; that is, the water flowing through the fourth channel 40 will not be diverted by the third channel 30.

[0104] It is understandable that the bottom wall of the fourth flow channel 40 is the inner wall of the fourth flow channel 40 at the lowest point (e.g., closest to the ground) in the height direction of the laundry washing equipment 1000.

[0105] This disclosure does not limit the specific value of the preset height mentioned above; it can have any suitable value, as long as it ensures that the water in the fourth flow channel 40 does not enter the connecting flow channel 50.

[0106] This disclosure does not limit the construction of the connecting channel 50. As one embodiment, such as Figure 5 As shown, the diameter of the connecting channel 50 is smaller than the diameter of the third channel 30.

[0107] Since the diameter of the connecting channel 50 is smaller than that of the third channel 30, even if the connecting channel 50 and the third channel 30 are coaxially arranged, the bottom wall of the connecting channel 50 can be higher than the bottom wall of the third channel 30. This makes it easier for the bottom wall of the connecting channel 50 to be higher than the height of the water flow in the fourth channel 40, thus preventing the water in the fourth channel 40 from being diverted by the connecting channel 50 and the third channel 30.

[0108] Furthermore, the connecting channel 50 and the third channel 30 are allowed to be coaxially arranged, which helps to save the length of the connecting channel 50 and the third channel 30.

[0109] As another embodiment of this disclosure, the diameter of the connecting channel 50 may be equal to the diameter of the third channel 30.

[0110] This disclosure does not limit the construction of the fourth flow channel 40. As one embodiment, such as Figure 5 As shown, the cross-section of the fourth flow channel 40 is the same at all points along the extension direction of the fourth flow channel 40.

[0111] The fourth flow channel 40 of this structure is easy to process and shape, and not only does it have less resistance to the water channel, but it also helps to reduce the impact of the water flow on itself, thus having good durability.

[0112] The fourth flow channel 40 of this structure is suitable for waterways with small water flow. The water flowing through the fourth flow channel 40 will not be higher than the position where the connecting flow channel 50 is connected to the fourth flow channel 40. This prevents the water in the fourth flow channel 40 from entering the first end of the connecting flow channel 50, thereby enabling the fourth flow channel 40 to have the aforementioned beneficial effects. It also obtains anti-siphon capability through the connecting flow channel 50 and can prevent the water flowing through the fourth flow channel 40 from being diverted by the connecting flow channel 50.

[0113] As another embodiment of this disclosure, the cross-section of the fourth flow channel 40 is different at various points along the extending direction of the fourth flow channel 40.

[0114] Optionally, such as Figure 2 and Figure 4 As shown, the pipe connection structure 100 includes a main body 60, a first branch pipe 71 and a second branch pipe 72. The first branch pipe 71 and the second branch pipe 72 are respectively connected to the main body 60. The first branch pipe 71 is used to connect to the first pipeline 1001. The first flow channel 10 includes a flow channel defined by the inner peripheral wall of the first branch pipe 71. The second branch pipe 72 is used to connect to the second pipeline 1002. The second flow channel 20 includes a flow channel defined by the inner peripheral wall of the second branch pipe 72 and a first sub-flow channel 21 located in the main body 60.

[0115] Since the first branch pipe 71 and the second branch pipe 72 are located outside the main body 60, it is convenient to connect the first pipe 1001 to the first branch pipe 71 and to the second pipe 1002 to the second branch pipe 72, thereby realizing the connection between the inlet end of the first pipe 1001 and the first flow channel 10, and the connection between the outlet end of the second pipe 1002 and the second flow channel 20.

[0116] Furthermore, since some of the flow channels of the second flow channel 20 have weaker rigidity due to their smaller diameter (such as the first sub-flow channel 21), the fact that some of the flow channels of the second flow channel 20 are located inside the main body 60 can protect the first sub-flow channel 21 from the main body 60, thereby improving the rigidity of the first sub-flow channel 21 and thus helping to prevent deformation of the first sub-flow channel 21.

[0117] Optionally, such as Figure 3As shown, the second sub-channel 22 can also be located within the main body 60, so that the second sub-channel 22 can be protected by the main body 60.

[0118] Optionally, such as Figure 2 and Figure 4 As shown, the pipe connection structure 100 also includes a fourth flow channel 40, a third branch pipe 73, and a fourth branch pipe 74. One end of the fourth flow channel 40 is used to connect to the water outlet of the third pipe 1003 of the laundry washing equipment 1000, and the other end of the fourth flow channel 40 is used to connect to the water inlet of the fourth pipe 1004 of the laundry washing equipment 1000. The fourth flow channel 40 and the third flow channel 30 are connected through a connecting flow channel 50. The third branch pipe 73 and the fourth branch pipe 74 are respectively connected to the main body 60. The fourth flow channel 40 includes a flow channel defined by the inner peripheral wall of the third branch pipe 73, a flow channel defined by the inner peripheral wall of the fourth branch pipe 74, and a flow channel located in the main body 60.

[0119] Since the third branch pipe 73 and the fourth branch pipe 74 are located outside the main body 60, it is convenient to connect the third pipe 1003 to the third branch pipe 73 and to the fourth pipe 1004 to the fourth branch pipe 74, thereby realizing the connection between the inlet end of the first pipe 1001 and one end of the fourth flow channel 40, and the connection between the outlet end of the fourth pipe 1004 and the other end of the fourth flow channel 40.

[0120] According to a second aspect of this disclosure, a laundry washing device 1000 is provided, including a first pipe 1001, a second pipe 1002, a vent pipe 1005, and the aforementioned pipe fitting connection structure 100. The water outlet of the first pipe 1001 is connected to a first flow channel 10, the water inlet of the second pipe 1002 is connected to a second flow channel 20, and the vent pipe 1005 is connected to a third flow channel 30.

[0121] Optionally, such as Figure 5 As shown, the pipe connection structure 100 may further include a fourth flow channel 40, which is connected to the third flow channel 30 via a connecting flow channel 50. The laundry washing equipment 1000 may further include a third pipe 1003 and a fourth pipe 1004, with one end of the fourth flow channel 40 connected to the outlet of the third pipe 1003 and the other end of the fourth flow channel 40 connected to the inlet of the fourth pipe 1004.

[0122] This disclosure does not limit the direction of extension of the fourth flow channel 40. The fourth flow channel 40 may extend in a horizontal direction or in a direction inclined to the horizontal direction.

[0123] As one embodiment of this disclosure, such as Figure 1As shown, the pipe connection structure 100 is arranged horizontally, the fourth flow channel 40 extends in the horizontal direction, the first end of the connecting flow channel 50 is connected to the fourth flow channel 40, and the lowest position of the first end of the connecting flow channel 50 is spaced apart from the bottom wall of the fourth flow channel 40 by a preset height, the preset height being greater than or equal to the water level height in the fourth flow channel 40.

[0124] By arranging the pipe connection structure 100 horizontally, the fourth flow channel 40 can be extended horizontally, which helps to ensure that the water level in the fourth flow channel 40 does not exceed the preset height.

[0125] This disclosure does not limit the device connected to the inlet end of the first pipeline 1001. As one embodiment, such as Figure 1 As shown, the laundry washing equipment 1000 also includes a water inlet valve 200, and the water inlet end of the first pipeline 1001 is connected to the water inlet valve 200.

[0126] As another embodiment of this disclosure, the inlet end of the first pipeline 1001 can also be directly connected to an external water source.

[0127] This disclosure does not limit the device connected to the water outlet of the second pipe 1002. In one embodiment, the laundry washing equipment 1000 also includes a washing drum, and the water outlet of the second pipe 1002 is connected to the washing drum.

[0128] As another embodiment of this disclosure, the water outlet of the second pipe 1002 can also be connected to the fan impeller of the drying cylinder, so that the water flowing out of the second pipe 1002 can be used as the rinsing water for the fan impeller.

[0129] This disclosure does not limit the device connected to the vent pipe 1005. As one embodiment, the laundry washing equipment 1000 also includes a washing box, and the vent pipe 1005 is connected to the washing box. Since the washing box is connected to the outside and is higher than the first pipe 1001, the second pipe 1002 and the pipe fitting connection structure 100, water can be prevented from flowing out to the outside under the action of gravity.

[0130] As another embodiment of this disclosure, the ventilation pipe 1005 can also be directly connected to the outside, as long as the end of the ventilation pipe 1005 that is not connected to the third flow channel 30 is higher than the first pipe 1001, the second pipe 1002 and the pipe fitting connection structure 100.

[0131] This disclosure does not limit the device connected to the inlet end of the third pipeline 1003. As one embodiment, such as Figure 1 As shown, the inlet end of the third pipeline 1003 is connected to the inlet valve 200.

[0132] As another embodiment of this disclosure, the inlet end of the third pipeline 1003 can also be directly connected to an external water source.

[0133] This disclosure does not limit the device connected to the water outlet of the fourth pipe 1004. In one embodiment, the water outlet of the fourth pipe 1004 is connected to the washing drum.

[0134] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0135] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0136] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A pipe fitting connection structure, characterized in that, include: The first flow channel is used to connect to the outlet end of the first pipe of the laundry washing equipment; The second flow channel is used to connect to the water inlet end of the second pipe of the laundry washing equipment; The third flow channel is used to connect to the air duct of the laundry washing equipment; The second flow channel includes a first sub-flow channel with a diameter smaller than that of the first flow channel. The first sub-flow channel is connected to the first flow channel and is also connected to the third flow channel. The transition between the first flow channel and the first sub-flow channel is non-gradual.

2. The pipe fitting connection structure according to claim 1, characterized in that, The second flow channel further includes a second sub-flow channel, wherein the outlet end of the first sub-flow channel is connected to the inlet end of the second sub-flow channel; The diameter of the outlet end of the first sub-channel is smaller than the diameter of the outlet end of the second sub-channel.

3. The pipe fitting connection structure according to claim 2, characterized in that, The diameter of the inlet end of the second sub-channel is equal to the diameter of the outlet end of the first sub-channel; The second sub-channel is constructed to gradually expand from its inlet end to its outlet end.

4. The pipe fitting connection structure according to claim 2, characterized in that, The two ends of the first sub-channel along its own extension direction are respectively connected to the first channel and the second sub-channel; The first sub-channel is connected to the third channel at its middle section along its extension direction.

5. The pipe fitting connection structure according to claim 2, characterized in that, The second flow channel further includes a third sub-flow channel, the inlet end of which is connected to the outlet end of the second flow channel section; Along the extension direction of the third sub-channel, the cross-section of the third sub-channel is the same at all points.

6. The pipe fitting connection structure according to claim 1, characterized in that, Along the extension direction of the first sub-channel, the cross-section of the first sub-channel is the same at all points; and / or, Along the extension direction of the first flow channel, the cross-section of the first flow channel is the same at all points.

7. The pipe fitting connection structure according to any one of claims 1-6, characterized in that, There are multiple first flow channels, and each of the multiple first flow channels is connected to a corresponding first pipeline; There are multiple second flow channels, and each of the multiple second flow channels is connected to a corresponding second pipeline.

8. The pipe fitting connection structure according to claim 7, characterized in that, Multiple first flow channels and multiple second flow channels are connected to the venting line through a common third flow channel.

9. The pipe fitting connection structure according to claim 8, characterized in that, Each of the second flow channels includes a first sub-flow channel, and the diameters of the first sub-flow channels of at least two of the plurality of second flow channels are different.

10. The pipe fitting connection structure according to any one of claims 1-6, characterized in that, The pipe fitting connection structure also includes a fourth flow channel; One end of the fourth flow channel is used to connect to the water outlet of the third pipe of the laundry equipment; The other end of the fourth flow channel is used to connect to the water inlet of the fourth pipe of the laundry washing equipment; The fourth flow channel is connected to the third flow channel via a connecting flow channel; The first end of the connecting channel is connected to the fourth channel, and the lowest position of the first end of the connecting channel is spaced at a preset height from the bottom wall of the fourth channel. The preset height is greater than or equal to the water level in the fourth channel.

11. The pipe fitting connection structure according to claim 10, characterized in that, The diameter of the connecting channel is smaller than the diameter of the third channel.

12. The pipe fitting connection structure according to claim 10, characterized in that, Along the extension direction of the fourth flow channel, the cross-section of the fourth flow channel is the same at all points.

13. The pipe fitting connection structure according to any one of claims 1-6, characterized in that, The pipe fitting connection structure includes a main body, a first branch pipe, and a second branch pipe, wherein the first branch pipe and the second branch pipe are respectively connected to the main body; The first branch pipe is used to connect to the first pipeline, and the first flow channel includes the flow channel defined by the inner peripheral wall of the first branch pipe; The second branch pipe is used to connect to the second pipeline, and the second flow channel includes the flow channel defined by the inner peripheral wall of the second branch pipe and the first sub-flow channel located within the main body.

14. The pipe fitting connection structure according to claim 13, characterized in that, The pipe fitting connection structure also includes a fourth flow channel, a third branch pipe, and a fourth branch pipe; One end of the fourth flow channel is used to connect to the water outlet of the third pipe of the laundry equipment; The other end of the fourth flow channel is used to connect to the water inlet of the fourth pipe of the laundry washing equipment; The fourth flow channel is connected to the third flow channel via a connecting flow channel; The third branch pipe and the fourth branch pipe are respectively connected to the main body; The fourth flow channel includes the flow channel defined by the inner peripheral wall of the third branch pipe, the flow channel defined by the inner peripheral wall of the fourth branch pipe, and the flow channel located within the main body.

15. A clothing washing device, characterized in that, It includes a first pipeline, a second pipeline, a venting pipeline, and a pipe fitting connection structure according to any one of claims 1-14; The outlet of the first pipe is connected to the first flow channel, the inlet of the second pipe is connected to the second flow channel, and the vent pipe is connected to the third flow channel.

16. The laundry washing equipment according to claim 15, characterized in that, The pipe fitting connection structure further includes a fourth flow channel, which is connected to the third flow channel via a connecting flow channel; The laundry equipment also includes a third pipeline and a fourth pipeline; One end of the fourth flow channel is connected to the outlet end of the third pipe, and the other end of the fourth flow channel is connected to the inlet end of the fourth pipe.

17. The laundry washing equipment according to claim 16, characterized in that, The pipe fitting connection structure is arranged horizontally, and the fourth flow channel extends in the horizontal direction; The first end of the connecting channel is connected to the fourth channel, and the lowest position of the first end of the connecting channel is spaced at a preset height from the bottom wall of the fourth channel. The preset height is greater than or equal to the water level in the fourth channel.

18. The laundry washing apparatus according to any one of claims 15-17, characterized in that, The laundry equipment further includes a water inlet valve, and the water inlet end of the first pipeline is connected to the water inlet valve; and / or, The laundry equipment further includes a washing drum, and the outlet end of the second pipe is connected to the washing drum; and / or, The laundry equipment also includes a washing box, and the ventilation pipe is connected to the washing box.

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