Up-drainage washing machine

Abstract

The invention belongs to the technical field of washing machines, and particularly relates to an upward drainage washing machine. The upper drainage washing machine comprises a machine shell, a washing drum, a drainage mechanism and a residual water drainage assembly. The washing drum is arranged in the machine shell, and the drainage mechanism is arranged on the machine shell and used for discharging waste water in the washing drum. The residual water discharging assembly comprises a siphon and a siphon generating part, the siphon is provided with a first end and a second end, the first end is communicated with the bottom of the water discharging mechanism, the second end extends out of the machine shell and is lower than the first end, and the highest point of the siphon is higher than or equal to the maximum water storage height of the washing barrel. The siphon generating piece is connected with the siphon and injects water into the siphon so as to actively trigger siphon. According to the upper drainage washing machine, the siphonic effect can be actively triggered, and residual waste water in the drainage mechanism can be drained.

Description

Technical Field

[0001] This application belongs to the technical field of washing machines, and particularly relates to an upper-drainage washing machine. Background Art

[0002] The drainage of washing machines is divided into two types: upper drainage and lower drainage. Upper drainage means that when the washing machine is washing, the wastewater used by the washing machine is first lifted to a certain height and then discharged from the drain pipe, and a water pump built into the washing machine is used for drainage. This is generally common in drum washing machines. Lower drainage is to discharge the wastewater used by the washing machine from the drain pipe at the bottom of the washing machine, mainly draining by its own gravity. This is generally common in pulsator washing machines.

[0003] For traditional upper-drainage washing machines, in order to prevent the water in the washing tub from being drained during the washing process, the drain pipe at the rear of the drain pump usually needs to be lifted, and the lifting height is not lower than the maximum water level of the washing machine program. When drainage is required, the drain pump is used for drainage. The drain pump is a water flow driving device arranged in the drainage pipeline. Only in this way can the washing machine normally intake water, store water, and be used for washing.

[0004] However, at the end of drainage, when the water volume is insufficient and the internal space of the drain pump has admitted air, the drain pump cannot drive the water flow to continue to be discharged outside the washing machine through the highest point of the drain pipe, resulting in some wastewater remaining in the washing machine, making it extremely easy for bacteria to breed and mildew to occur inside the washing machine, and thus generating odors. Summary of the Invention

[0005] This application provides an upper-drainage washing machine to solve the problem that some wastewater remains in the washing machine, making it extremely easy for bacteria to breed and mildew to occur inside the washing machine, and thus generating odors.

[0006] This application provides an upper-drainage washing machine, including a machine shell, a washing tub, a drainage mechanism, and a residual water drainage component; the washing tub is arranged inside the machine shell, and the drainage mechanism is arranged on the machine shell for discharging the wastewater in the washing tub;

[0007] The residual water drainage component includes a siphon pipe and a siphon generating member. The siphon pipe has a first end and a second end. The first end is communicated with the bottom of the drainage mechanism, and the second end extends outside the machine shell. The height of the second end is lower than the height of the first end. The height of the highest point of the siphon pipe is greater than or equal to the maximum water storage height of the washing tub. The siphon generating member is connected to the siphon pipe and injects water into the siphon pipe to actively trigger siphonage.

[0008] In some embodiments, the drainage mechanism includes a water inlet pipe, a micro lint separation device, a drainage pump, and a main drainage pipe. One end of the water inlet pipe communicates with the bottom of the washing tub, and the other end of the water inlet pipe communicates with the water inlet of the drainage pump. The micro lint separation device is arranged in the water inlet pipe to separate impurities in the waste water. The main drainage pipe communicates with the water outlet of the drainage pump. The height of the highest point of the main drainage pipe is greater than or equal to the maximum water storage height of the washing tub. The first end of the siphon pipe is located between the micro lint separation device and the water inlet of the drainage pump, and the diameter of the siphon pipe is smaller than the diameter of the main drainage pipe.

[0009] In some embodiments, the main drainage pipe includes an inner drainage pipe, an outer drainage pipe, and an outer joint. The inner drainage pipe communicates with the water outlet of the drainage pump. The outer joint is used to connect the inner drainage pipe and the outer drainage pipe. The outer drainage pipe is bent, and the height of the highest point of the outer drainage pipe is greater than or equal to the maximum water storage height of the washing tub.

[0010] In some embodiments, the siphon pipe penetrates into the outer drainage pipe, and the length of the siphon pipe located inside the outer drainage pipe is less than the length of the outer drainage pipe.

[0011] In some embodiments, the siphon generating member includes a siphon trigger pipe and a valve. The siphon trigger pipe communicates with the siphon pipe. The valve is arranged on the siphon trigger pipe to open and close the siphon trigger pipe. The siphon trigger pipe communicates with an external water source and actively injects water into the siphon pipe to fill the siphon pipe and trigger siphonage.

[0012] In some embodiments, the siphon generating member further includes an inner joint. The siphon pipe includes a first pipe and a second pipe. The inner joint is arranged between the first pipe and the second pipe, and the siphon trigger pipe communicates with the inner joint.

[0013] In some embodiments, the inner joint is located on one side of the highest point inside the outer drainage pipe close to the inner drainage pipe.

[0014] In some embodiments, the inner joint is located on one side of the highest point inside the outer drainage pipe away from the inner drainage pipe.

[0015] In some embodiments, a main pipe and an auxiliary pipe are arranged inside the inner joint. One end of the auxiliary pipe is connected to the main pipe. The diameter of the auxiliary pipe is smaller than the diameter of the main pipe. The angle between the auxiliary pipe and the main pipe is an acute angle along the water flow direction. The siphon trigger pipe communicates with the auxiliary pipe, and the first pipe and the second pipe respectively communicate with both ends of the main pipe.

[0016] In some embodiments, a filter screen is provided at the water inlet of the drainage pump, and the filter screen surrounds the outlet end of the micro lint separation device.

[0017] An upper drainage washing machine provided by the present application, through the arrangement of a siphon tube and a siphon generating member, the residual wastewater stays at the lowest point of the drainage mechanism, and water is injected into the siphon tube through the siphon generating member to fill the siphon tube, so that the siphon tube discharges the residual wastewater inside the drainage mechanism under the action of siphonage, thereby enabling the inside of the washing machine to dry as soon as possible, reducing the possibility of bacteria and mildew generating peculiar smells, and improving the user experience effect; moreover, the arrangement of the filter screen avoids the possibility of the siphon tube being blocked, thereby keeping the siphon tube unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0019] Figure 1 Structural schematic diagram of the upper drainage washing machine provided by the embodiment of the present application Figure 1 ;

[0020] Figure 2 Structural schematic diagram of the upper drainage washing machine provided by the embodiment of the present application Figure 2 ;

[0021] Figure 3 Structural schematic diagram of the inner joint provided by the embodiment of the present application.

[0022] Description of the reference numerals:

[0023] 100, housing;

[0024] 200, washing tub; 210, outer tub; 220, inner tub;

[0025] 300, drainage mechanism; 310, water guiding pipe; 320, micro lint separation device; 330, drainage pump; 340, main drain pipe; 341, inner drain pipe; 342, outer drain pipe; 343, outer joint;

[0026] 400, residual water drainage assembly; 410, siphon tube; 411, first pipe; 412, second pipe; 420, siphon generating member; 421, siphon trigger pipe; 422, valve; 423, inner joint; 4231, main pipe; 4232, auxiliary pipe; 430, filter screen.

[0027] Through the above drawings, the specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and the textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings in the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0029] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned accompanying drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0030] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0031] The drainage of a washing machine is divided into two types: upper drainage and lower drainage. Upper drainage means that when the washing machine is washing, the wastewater used by the washing machine is first lifted up a certain height and then discharged from the drain pipe, and a water pump built in the washing machine is used for drainage. This is generally common in drum washing machines. Lower drainage is to discharge the wastewater used by the washing machine from the drain pipe at the bottom of the washing machine, mainly by opening the drain valve and relying on its own gravity for drainage. This is generally common in pulsator washing machines.

[0032] For a traditional upper-drainage washing machine, in order to prevent the water in the washing tub from being drained during the washing process, the drain pipe at the rear of the drain pump usually needs to be lifted, and the lifting height is not lower than the maximum water level of the washing machine program. When the washing machine needs to drain water, the drain pump is used for drainage. The drain pump is a water flow driving device arranged in the drainage pipeline. Only in this way can the washing machine normally intake water, store water and supply it for washing use.

[0033] However, when the drainage is about to end, the water volume is insufficient, and air has entered the internal space of the drainage pump, the drainage pump cannot drive the water flow to continue to be discharged outside the washing machine through the highest point of the drainage pipe. When the drainage pump stops, the water in the pipeline between the drainage pump and the highest point of the drainage pipe will flow back into the drainage pump. This part of the water volume is related to the diameter of the drainage pipe and the height of the highest point, usually 300 - 600 milliliters. This water is in an almost enclosed space and is hardly disturbed by the external air. Therefore, the evaporated water vapor accumulates inside the washing machine, usually between the inner and outer drums, resulting in some wastewater remaining in the washing machine for a long time, making it extremely easy for bacteria to breed and mildew to occur inside the washing machine, and thus generating odors.

[0034] To solve the above problems, that is, to drain the residual wastewater staying at the lowest part of the drainage mechanism, the present application provides an upper drainage washing machine. Through the setting of a siphon pipe and a siphon generating member, the siphon generating member is used to inject water into the siphon pipe to fill the siphon pipe, so that the siphon pipe discharges the residual wastewater inside the drainage mechanism under the action of siphon, thereby keeping the inside of the washing machine dry, reducing the possibility of bacteria breeding, mildew and odor generation, and improving the user experience effect; moreover, the setting of the filter screen avoids the possibility of the siphon pipe being blocked, thus keeping the siphon pipe unobstructed.

[0035] The following will specifically describe the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems with specific embodiments. These specific embodiments below can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following will describe the embodiments of the present application in conjunction with the drawings.

[0036] The present application provides an upper drainage washing machine, referring to Figures 1 to 3 , the upper drainage washing machine includes a casing 100, a washing tub 200, a drainage mechanism 300 and a residual water drainage assembly 400; the washing tub 200 is arranged inside the casing 100, and the drainage mechanism 300 is arranged on the casing 100 for draining the wastewater in the washing tub 200.

[0037] The residual water drainage assembly 400 includes a siphon pipe 410 and a siphon generating member 420. The siphon pipe 410 has a first end and a second end. The first end is communicated with the bottom of the drainage mechanism 300, and the second end extends outside the casing 100. The height of the second end is lower than the height of the first end. The height of the highest point of the siphon pipe 410 is greater than or equal to the maximum water storage height of the washing tub 200. The siphon generating member 420 is connected to the siphon pipe 410 and injects water into the siphon pipe 410 to actively trigger siphon.

[0038] Among them, the washing drum 200 includes an outer drum 210 and an inner drum 220. The outer drum 210 is fixed inside the housing 100, and the inner drum 220 is rotatably arranged inside the outer drum 210. In this application, the washing machine takes a drum washing machine as an example, but is not limited to a drum washing machine and can also be applied to other forms of washing machines.

[0039] By adopting the above technical solution, through the arrangement of the siphon tube 410 and the siphon generating member 420, the residual wastewater stays at the lowest part of the drainage mechanism 300. The siphon generating member 420 injects water into the siphon tube 410 to fill the siphon tube 410, so that the siphon tube 410 discharges the residual wastewater inside the drainage mechanism 300 under the action of siphonage, thereby keeping the inside of the washing machine dry, reducing the possibility of bacteria and mildew generating peculiar smells, and improving the user experience effect.

[0040] In some embodiments, referring to Figure 1 , the drainage mechanism 300 includes a water guiding pipe 310, a micro lint separation device 320, a drainage pump 330 and a main drainage pipe 340. One end of the water guiding pipe 310 is communicated with the bottom of the washing drum 200, the other end of the water guiding pipe 310 is communicated with the water inlet of the drainage pump 330, the micro lint separation device 320 is arranged at the water inlet of the drainage pump 330 to separate impurities in the wastewater, the main drainage pipe 340 is communicated with the water outlet of the drainage pump 330, the height of the highest point of the main drainage pipe 340 is greater than or equal to the maximum water storage height of the washing drum 200, the first end of the siphon tube 410 is located between the micro lint separation device 320 and the water inlet of the drainage pump 330, and the diameter of the siphon tube 410 is smaller than the diameter of the main drainage pipe 340.

[0041] The water guiding pipe 310 is arranged at the bottom of the outer drum 210, and the water in the outer drum 210 can completely flow into the water guiding pipe 310. The micro lint separation device 320 is installed at the water inlet of the drainage pump 330, and the water inlet end of the micro lint separation device 320 is completely attached to the inner side wall of the water guiding pipe 310. After the wastewater enters the water guiding pipe 310, it all flows into the micro lint separation device 320. After filtering the impurities in the wastewater, it then enters the drainage pump 330, thereby reducing the impurities entering the siphon tube 410 and avoiding the blockage of the siphon tube 410.

[0042] Among them, the main drainage pipe 340 is bent and arranged on the housing 100, so that the height of the highest point of the main drainage pipe 340 is greater than or equal to the maximum water storage height of the washing drum 200 to ensure the water storage during normal use of the washing machine.

[0043] Exemplarily, the diameter of the siphon tube 410 is much smaller than the diameter of the main drainage pipe 340, so as to facilitate the discharge of the residual wastewater in the main drainage pipe 340.

[0044] By adopting the above technical solution, when the drain pump 330 pumps the wastewater in the outer cylinder 210, the wastewater is first filtered by the micro lint separation device 320 to filter out the impurities in the wastewater, thereby reducing the impurities in the wastewater entering the drain pump 330, and further avoiding the possibility of blockage of the siphon tube 410; the drain pump 330 pumps the wastewater in the water inlet pipe 310 and discharges it from the main drain pipe 340; after air enters the drain pump 330 and it stops operating due to inability to drain water, the wastewater in the main drain pipe 340 flows back to the lowest end of the drain pump 330; then water is injected into the siphon tube 410 through the siphon generating part 420. After the siphon tube 410 is filled, the siphon effect occurs in the siphon tube 410, and the wastewater at the lowest end is pumped out, thereby achieving complete discharge of the wastewater and enabling the interior of the washing machine to dry quickly.

[0045] Among them, when the washing machine is washing clothes, the height of the highest point of the siphon tube 410 and the height of the highest point of the main drain pipe 340 are both greater than the maximum water storage height of the washing machine, thereby avoiding the possibility of water leakage from the siphon tube 410 and the main drain pipe 340 during normal use of the washing machine. Only when the drain pump 330 stops, water is actively injected into the siphon tube 410, and under the action of the water flow power, after the siphon tube 410 is filled, the siphon effect of the siphon tube 410 can be triggered, thereby avoiding the siphon tube 410 from being accidentally triggered during the normal use of the washing machine.

[0046] In some embodiments, referring to Figure 1 , the main drain pipe 340 includes an inner drain pipe 341, an outer drain pipe 342, and an outer joint 343. The inner drain pipe 341 is communicated with the water outlet of the drain pump 330. The outer joint 343 is used to connect the inner drain pipe 341 and the outer drain pipe 342. The outer drain pipe 342 is bent, and the height of the highest point of the outer drain pipe 342 is greater than or equal to the maximum water storage height of the washing tub 200.

[0047] Exemplarily, the inner drain pipe 341 is a rigid pipe, the outer drain pipe 342 is a flexible pipe, the end of the outer drain pipe 342 away from the inner drain pipe 341 is used to connect to a floor drain, and the outer joint 343 is used to connect the outer drain pipe 342 and the inner drain pipe 341. The outer joint 343 is a plastic part.

[0048] In some embodiments, referring to Figure 1 , the siphon tube 410 penetrates into the outer drain pipe 342, and the length of the siphon tube 410 located inside the outer drain pipe 342 is less than the length of the outer drain pipe 342.

[0049] Exemplarily, the siphon 410 is inserted into the outer drain pipe 342, thus avoiding the exposure of the siphon 410 and improving the aesthetic appearance of the washing machine. Moreover, after the siphon 410 is inserted into the outer drain pipe 342, it naturally bends along with the outer drain pipe 342, so that the highest point of the siphon 410 is greater than or equal to the maximum water storage height of the washing machine, avoiding the possibility of water leakage from the siphon 410 during normal use.

[0050] In other embodiments, the siphon 410 can also be arranged on the outer wall of the outer drain pipe 342. It can be fixedly connected to the outer drain pipe 342 by means of a buckle or the like to bend along with the outer drain pipe 342.

[0051] In some embodiments, referring to Figure 1 , the siphon generating member 420 includes a siphon trigger pipe 421 and a valve 422. The siphon trigger pipe 421 is communicated with the siphon 410. The valve 422 is arranged on the siphon trigger pipe 421 to open and close the siphon trigger pipe 421. The siphon trigger pipe 421 is communicated with an external water source and actively injects water into the siphon 410 when needed to fill the siphon 410 and trigger siphonage.

[0052] Among them, the siphon trigger pipe 421 is a thin pipe, and the diameter of the siphon trigger pipe 421 is less than or equal to the diameter of the siphon 410. The siphon trigger pipe 421 has strong pressure-bearing capacity. The siphon trigger pipe 421 can be a flexible pipe or a rigid pipe. The siphon trigger pipe 421 is connected to the water supply pipe through the valve 422, and the valve 422 adopts an electromagnetic valve to facilitate automatic control of the opening and closing of the valve 422.

[0053] The siphon 410 is also a thin pipe. When the siphon 410 is a flexible pipe, the siphon 410 must be able to withstand a certain degree of negative pressure, so as to avoid the situation that the pipeline is flattened by the atmospheric pressure and affects drainage.

[0054] By adopting the above technical solutions, when the residual wastewater needs to be discharged, the control unit of the washing machine controls the valve 422 to open. The tap water enters the siphon 410 through the siphon trigger pipe 421 to fill the siphon 410, and then the valve 422 is closed, so that the siphon 410 triggers the siphon effect to discharge the residual wastewater.

[0055] In some embodiments, referring to Figure 1 , the siphon generating member 420 further includes an inner joint 423. The siphon 410 includes a first pipe 411 and a second pipe 412. The first end of the siphon 410 is located on the first pipe 411, and the second end of the siphon 410 is located on the second pipe 412. The inner joint 423 is arranged between the first pipe 411 and the second pipe 412, and the siphon trigger pipe 421 is communicated with the inner joint 423.

[0056] Further, one end of the first pipe 411 is connected to the lowest end of the drainage pump 330, that is, the lowest end where the water inlet of the drainage pump 330 is connected to the micro lint separation device 320, so as to facilitate the complete discharge of wastewater. The inner joint 423 is a three-way pipe that connects the first pipe 411, the second pipe 412, and the siphon trigger pipe 421. The second pipe 412 is located inside the outer drainage pipe 342.

[0057] Exemplarily, a check valve (not shown in the figure) can also be provided on the first pipe 411. The check valve is provided at the end of the first pipe 411 close to the drainage pump 330, so as to prevent excessive water flow from flowing from the siphon 410 into the drainage pump 330 during the process of filling the siphon 410 with water.

[0058] Further, the second pipe 412 can also be integrally formed with the outer drainage pipe 342, thereby avoiding the situation where the siphon 410 shakes inside the outer drainage pipe 342, and thus improving the stability effect.

[0059] In some embodiments, referring to Figure 1 ..., the inner joint 423 is located on the side close to the inner drainage pipe 341 at the highest point inside the outer drainage pipe 342.

[0060] Further, the inner joint 423 is located inside the outer joint 343, and both the siphon 410 and the siphon trigger pipe 421 pass through the outer joint 343 to be connected to the inner joint 423.

[0061] When the inner joint 423 is located on the side close to the inner drainage pipe 341 at the highest point inside the outer drainage pipe 342, when the siphon trigger pipe 421 fills the siphon 410 with water through the inner joint 423, the water flow first fills the pipe on the side of the highest point of the siphon 410 close to the drainage pump 330, and then overflows to the other side through the highest point. And under the driving force of the water flow, until the siphon 410 is filled. At this time, closing the valve 422 can trigger the siphon effect of the siphon 410 to suck out the residual wastewater in the drainage pump 330. Since the water pressure of the tap water in the siphon trigger pipe 421 is large enough, even if no check valve is provided on the siphon 410, the siphon 410 can be quickly filled without injecting too much water into the interior of the washing machine, and the extra water injected can be sucked out together during the siphon process.

[0062] Normally, as long as the valve 422 is opened, the siphon can be triggered. In this case, regardless of the state of the washing machine, as long as the valve 422 is opened, the siphon 410 can pump water out of the drainage pump 330. To avoid wasting water, it can be controlled to trigger the siphon only after the last drainage. That is, it is executed when the control program of the washing machine is about to shut down after the dehydration stops. That is to say, during the main washing and rinsing stages of the washing machine in the middle, the residual water in the drainage pump 330 does not need to be discharged after drainage.

[0063] Moreover, the opening time of the valve 422 can be controlled through the control program of the washing machine, so as to achieve the operation of stopping water injection after the siphon 410 is completely filled.

[0064] In some embodiments, referring to Figure 2 , the inner joint 423 is located on the side away from the inner drain pipe 341 at the highest point inside the outer drain pipe 342.

[0065] Furthermore, both the siphon 410 and the siphon trigger pipe 421 pass through the outer joint 343 and extend into the outer drain pipe 342 to be connected with the inner joint 423.

[0066] When the inner joint 423 is located on the side away from the inner drain pipe 341 at the highest point inside the outer drain pipe 342, when the siphon trigger pipe 421 injects water into the siphon 410 through the inner joint 423, the water flows out through the outside of the highest point of the siphon 410. The siphon trigger pipe 421 is connected to the water pipe, and the pressure of the tap water is high enough. At the same time, the diameter of the siphon 410 is small. During the flow of the tap water in the siphon 410, a certain suction force is generated, which sucks up the waste water at the first end of the siphon 410, passes through the highest point of the siphon 410, and flows out after mixing with the tap water; at this time, the siphon 410 is also filled. Even if the valve 422 is closed, under the action of the siphon effect, the remaining waste water is discharged. The valve 422 can also be kept open until the siphon 410 completely sucks and discharges the waste water and then the valve 422 is closed.

[0067] The outer joint 343 can be not provided, and at the same time, the inner joint 423, the siphon 410, and the siphon trigger 420 are all located outside the main drain pipe 340. This is more conducive to maintenance.

[0068] In extreme cases, the water pressure of the tap water is very low. When the valve 422 is opened, the negative pressure generated after the tap water enters the inner joint 423 is insufficient, and the siphon may not be triggered. At this time, the negative pressure generated at the nozzle of the second pipe 412 during the drainage of the washing machine can be used at the same time to trigger the siphon.

[0069] Since the diameter of the second pipe 412 is much smaller than that of the outer drain pipe 342, and the water consumption each time is very small, less than 150 milliliters of water, it is very easy to trigger the siphon.

[0070] In some embodiments, referring to Figure 1 and Figure 3, a main pipe 4231 and an auxiliary pipe 4232 are arranged inside the internal joint 423. One end of the auxiliary pipe 4232 is connected to the main pipe 4231. The diameter of the auxiliary pipe 4232 is smaller than that of the main pipe 4231. The included angle between the auxiliary pipe 4232 and the main pipe 4231 is an acute angle along the water flow direction. The siphon trigger pipe 421 is communicated with the auxiliary pipe 4232. The first pipe 411 and the second pipe 412 are respectively communicated with both ends of the main pipe 4231.

[0071] By adopting the above technical solution, the included angle between the auxiliary pipe 4232 and the main pipe 4231 is an acute angle, so that tap water directly flows out from the second pipe 412 and will not enter the first pipe 411. The pressure of the tap water will not act on the inside of the first pipe 411. Instead, the flow of the water will form a negative pressure inside the first pipe 411.

[0072] In some embodiments, refer to Figure 1 , a filter screen 430 is arranged at the water inlet of the drainage pump 330. The filter screen 430 surrounds the outlet end of the micro wire debris separation device 320.

[0073] Specifically, the filter screen 430 is of a cylindrical structure and is connected to the outlet end of the micro wire debris separation device 320, so as to further filter the sewage. And the filter screen 430 is of a detachable structure, so that the filter screen 430 can be removed to clean the impurities accumulated in the filter screen 430.

[0074] By adopting the above technical solution, the filter screen 430 further filters the waste water entering the siphon 410, thereby further reducing the possibility of the siphon 410 being blocked.

[0075] An upper drainage washing machine provided by the present application, through the arrangement of the siphon 410 and the siphon generating part 420, the residual waste water stays at the lowest part of the drainage mechanism 300. The siphon generating part 420 injects water into the siphon 410 to fill the siphon 410, so that the siphon 410 discharges the residual waste water inside the drainage mechanism 300 under the siphon action, thereby quickly drying the inside of the washing machine, reducing the possibility of bacteria and mildew generating peculiar smell, and improving the user experience effect; and, the arrangement of the filter screen 430 avoids the possibility of the siphon 410 being blocked, thereby keeping the siphon 410 unobstructed.

[0076] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An upper drainage washing machine, characterized in that, It includes a casing, a washing tub, a drainage mechanism and a residual water discharging component; the washing tub is arranged inside the casing, and the drainage mechanism is arranged on the casing for discharging the waste water in the washing tub; The residual water discharging component includes a siphon pipe and a siphon generating member. The siphon pipe has a first end and a second end. The first end is communicated with the bottom of the drainage mechanism, and the second end extends outside the casing. The height of the second end is lower than that of the first end. The height of the highest point of the siphon pipe is greater than or equal to the maximum water storage height of the washing tub. The siphon generating member is connected to the siphon pipe and injects water into the siphon pipe to actively trigger siphonage.

2. The upper drainage washing machine according to claim 1, wherein, The drainage mechanism includes a water guiding pipe, a micro lint separation device, a drainage pump and a main drainage pipe. One end of the water guiding pipe is communicated with the bottom of the washing tub, and the other end of the water guiding pipe is communicated with the water inlet of the drainage pump. The micro lint separation device is arranged inside the water guiding pipe for separating impurities in the waste water. The main drainage pipe is communicated with the water outlet of the drainage pump. The height of the highest point of the main drainage pipe is greater than or equal to the maximum water storage height of the washing tub. The first end is located between the micro lint separation device and the water inlet of the drainage pump. The diameter of the siphon pipe is smaller than that of the main drainage pipe.

3. The upper drainage washing machine according to claim 2, wherein, The main drainage pipe includes an inner drainage pipe, an outer drainage pipe and an outer joint. The inner drainage pipe is communicated with the water outlet of the drainage pump. The outer joint is used for connecting the inner drainage pipe and the outer drainage pipe. The outer drainage pipe is bent. The height of the highest point of the outer drainage pipe is greater than or equal to the maximum water storage height of the washing tub.

4. The upper drainage washing machine according to claim 3, characterized in that, The siphon pipe penetrates into the outer drainage pipe, and the length of the siphon pipe located inside the outer drainage pipe is smaller than the length of the outer drainage pipe.

5. The upper drainage washing machine according to claim 4, wherein The siphon generating member includes a siphon trigger pipe and a valve. The siphon trigger pipe is communicated with the siphon pipe. The valve is arranged on the siphon trigger pipe for opening and closing the siphon trigger pipe. The siphon trigger pipe is communicated with an external water source and actively injects water into the siphon pipe to fill the siphon pipe and trigger siphonage.

6. The upper drainage washing machine according to claim 5, wherein, The siphon generating member further includes an inner joint. The siphon pipe includes a first pipe and a second pipe. The inner joint is arranged between the first pipe and the second pipe. The siphon trigger pipe is communicated with the inner joint.

7. The upper drainage washing machine according to claim 6, wherein The inner joint is located on one side close to the inner drainage pipe at the highest point inside the outer drainage pipe.

8. The upper-drain washing machine according to claim 6, wherein The inner joint is located on one side far from the inner drainage pipe at the highest point inside the outer drainage pipe.

9. The upper-drain washing machine according to claim 8, wherein, A main pipe and an auxiliary pipe are arranged inside the inner joint. One end of the auxiliary pipe is connected to the main pipe. The diameter of the auxiliary pipe is smaller than that of the main pipe. The included angle between the auxiliary pipe and the main pipe is an acute angle. The siphon trigger pipe is communicated with the auxiliary pipe. The first pipe and the second pipe are respectively communicated with both ends of the main pipe.

10. The upper drainage washing machine according to any one of claims 2-9, characterized in that, A filter screen is arranged at the water inlet of the drainage pump, and the filter screen surrounds the outlet end of the micro lint separation device.

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