A water-saving washing machine drain device

Abstract

The present invention discloses a drain device for a water-saving washing machine, which relates to the technical field of water-saving washing machines. A drain cylinder is arranged on the flange of an inner barrel, and since the drainage groove is convenient for draining sewage, not only the drainage is fast but also the drainage will not be blocked. The present invention comprises a flange for mounting the inner barrel of the water-saving washing machine on a clutch dehydration shaft, and a drain cylinder with an inner hole larger than the outer diameter of the dehydration shaft is mounted and connected on the flange. An outer barrel is arranged outside the inner barrel, and a clutch is mounted on the outer barrel. A cavity cover is arranged on the outer barrel, and a cavity is formed between the cavity cover and the clutch. The cavity is connected to an external drainage pipe through a drainage port at the bottom, and the cavity is connected to the drain cylinder at the top. The present invention arranges a drain cylinder on the flange of the inner barrel, and since the drainage groove formed by the drain cylinder is convenient for draining sewage, not only the drainage is fast but also the drainage will not be blocked, the drainage speed and drainage efficiency are greatly improved. Since not only the drainage can be discharged but also the washing dirt can be effectively discharged, the self-cleaning ability of the washing machine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water-saving washing machines, and in particular to a drainage device of a water-saving washing machine. Background Art

[0002] Current water-saving washing machines Figure 1 As shown, a drain hole 5 is provided on the dehydration shaft 15 of the clutch 14. Since the dehydration shaft 15 must pass through the inner hole of the outer barrel 1 during installation, the outer diameter of the dehydration shaft and the inner diameter of the water seal are limited, and the water sealing requirement of the water seal is very high, which greatly restricts the setting space of the drain hole 5. In order to achieve water sealing and facilitate drainage, an inverted bowl 7 is provided outside the drain hole 5. The inverted bowl 7 is connected to the dehydration shaft 15 on the upper side and connected to the cavity cover 9 provided on the outer barrel 1 through a large water seal 8 on the lower side to form cavity drainage, so as to solve the requirement of relative rotation between the inner barrel 2 and the outer barrel 1. Due to the limitation of the inner hole of the outer barrel and the large water seal diameter of the clutch and the outer barrel, the drain hole provided on the dehydration shaft of the clutch is very small, which not only drains slowly, but also the dirt generated by washing easily blocks the drain hole, resulting in low efficiency of the washing machine, or even inability to use it. This is a technical problem that we urgently need to solve.

[0003] In order to solve the water-saving and secondary pollution problems of fully automatic pulsator or drum washing machines, the industry has developed environmentally friendly washing machines, namely, hole-free washing drum washing machines. For example, the lower part of the inner drum of a pulsator washing machine is an integral design, and there is a circle of water-spraying holes only in the part of the barrel wall close to the balance ring, and there are no holes in other parts. During the washing process of this structure, the inner drum is filled with water, but there is no water between the inner drum and the casing, which can solve the problems of water-saving and secondary pollution.

[0004] Patent application JP07250989A discloses a dehydration washing machine, a washing machine / dehydration barrel (hereinafter referred to as inner barrel) with a pulsator rotatably mounted at the center of the bottom, the inner barrel rotatably mounted inside the outer barrel, the pulsator connected to the deceleration clutch through the washing shaft, the inner barrel assembled and connected to the washing shaft through the dehydration shaft, a coupling assembly is assembled on the inner barrel and the dehydration shaft, a vertical drainage hole is arranged on the coupling assembly, a sealing receiver is arranged at a position corresponding to the drainage hole below the coupling assembly, a water seal is arranged at the connection between the sealing receiver and the coupling assembly, the lower end of the sealing receiver is arranged on the upper surface of the bottom of the outer barrel, a sealing gasket is arranged at the connection between the sealing receiver and the bottom of the outer barrel, and a drainage port connected to the sealing receiver is arranged on the bottom of the outer barrel. This scheme discloses a washing barrel with no holes in the inner barrel, by arranging a coupling assembly at the bottom of the inner barrel to connect a sealing receiver and the inner barrel, and arranging a drainage hole on the coupling assembly, so as to realize the connection between the washing water in the inner barrel and the sealing receiver.

[0005] However, in this solution, there are the following technical problems:

[0006] .The connecting piece is connected to the upper sleeve and flange of the clutch. The diameter of the drainage hole set on the connecting piece must be much smaller than the distance between the end of the sealing receiver and the upper sleeve of the clutch, resulting in a very small flow area of ​​the drainage hole, which is easily blocked by hair or washing during the washing process.

[0007] During the assembly process, it is difficult to ensure the same coaxiality between the water seal and the coupling at the connection between the sealing receiver and the coupling. Although it is theoretically feasible, it is easy to cause mechanical wear during use, which may lead to failure of the seal of the water seal due to wear and tear, causing water leakage.

[0008] In order to increase the drainage efficiency of washing water, thereby increasing the diameter of the connecting piece and expanding the diameter of the drainage hole, it is necessary to increase the size of the oil seal set at the connection between the sealing receiver and the connecting piece. However, in actual application, the larger the size of the oil seal there is, the easier it is to leak.

[0009] In this solution, the sealing receiver is arranged on the upper part of the bottom of the outer cylinder, so that the height difference between the inner cylinder and the outer cylinder has to be increased, which makes a large change to the assembly of the whole machine, which is not conducive to the actual production application. In addition, raising the height of the inner cylinder is not conducive to the stability of the connection of the inner cylinder.

[0010] How to increase the drainage volume of washing water when the outer diameter of the water seal at the connecting parts is the same is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0011] The purpose of the present invention is to provide a water-saving washing machine drain device, by arranging a drain cylinder on the inner drum flange, since the drainage groove is convenient for draining sewage, not only the drainage is fast but also will not be blocked, thus overcoming the above-mentioned defects.

[0012] According to the above purpose, the technical solution of the present invention is: a water-saving washing machine drain device, including a flange for installing the inner barrel of the water-saving washing machine on the clutch dehydration shaft, characterized in that: a drain cylinder with an inner hole larger than the outer diameter of the dehydration shaft is installed and connected to the flange, an outer barrel is provided outside the inner barrel, a clutch is installed on the outer barrel, a cavity cover is provided on the outer barrel, a cavity is formed between the cavity cover and the clutch, the cavity is connected to an external drain pipe through a drain port at the bottom, and the cavity is connected to the drain cylinder at the top.

[0013] Furthermore, the drainage cylinder is a columnar shaft bowl formed by extending outward from the upper end of the dehydration shaft, the columnar shaft bowl is connected to the flange by fastening screws, and is connected to the cavity formed by the cavity cover through the lateral drainage port.

[0014] Further, alternatively, the drainage cylinder is stepped, and its upper end is mounted on the dehydration shaft via a transition connecting plate, the transition connecting plate, the dehydration shaft and the flange are connected as a whole via fastening screws, and its lower end is directly accommodated in the cavity cover.

[0015] The cavity cover is in a stepped shape, and the lower end thereof is installed and connected in the mounting plate of the clutch.

[0016] The drain cylinder and the cavity cover are sealed and connected via a large water seal.

[0017] A drainage groove for passing water and draining sewage is formed between the drainage cylinder and the clutch.

[0018] The drainage pipe is communicated with the air chamber cavity on the washing machine, and a drainage valve is arranged between the drainage pipe and the air chamber cavity.

[0019] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows: the present invention arranges a drain cylinder on the inner barrel flange, and the drainage groove formed by the drain cylinder is convenient for drainage, not only the drainage is fast but also will not be blocked, thereby greatly improving the drainage speed and drainage efficiency. Since it can not only drain water but also effectively discharge washing dirt, the self-cleaning ability of the washing machine is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work:

[0021] Figure 1 It is a schematic diagram of the structure of a drainage device in the prior art;

[0022] Figure 2 This is a structural schematic diagram of a first embodiment of a drainage device of the present invention;

[0023] Figure 3 This is a structural schematic diagram of a second embodiment of the drainage device of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the drainage cylinder of the first embodiment of the drainage device of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the drainage cylinder of the second embodiment of the drainage device of the present invention;

[0026] Figure 6 It is a schematic diagram of the assembly of the drainage trough of the drainage device of the present invention;

[0027] Figure 7 It is a top view schematic diagram of the water bowl in the drainage device of the present invention;

[0028] Figure 8 A side view schematic diagram of a water bowl in the drain device of the present invention;

[0029] Fig. 9 It is a schematic structural diagram of a washing machine with a drain tank and a drain tank according to the present invention;

[0030] Fig.10 A side view schematic diagram of another water bowl structure disclosed in the drainage device of the present invention;

[0031] Fig.11 This is a schematic diagram of a third type of drainage device according to the present invention;

[0032] Fig.12 This is a schematic diagram of a fourth type of drainage device according to the present invention;

[0033] Fig.13 This is a schematic diagram of a fifth drainage device according to the present invention;

[0034] Fig.14 This is a schematic diagram of a sixth type of drainage device according to the present invention;

[0035] Fig.15 A schematic diagram of the structure of another drainage trough disclosed by the present invention;

[0036] Fig.16 for Fig.15 The schematic diagram of the assembly of the transition bowl and the water ring is shown;

[0037] Fig.17 for Fig.16 The schematic diagram of the water ring structure shown;

[0038] Fig.18 for Fig.16 The schematic diagram of the transition bowl structure shown;

[0039] Fig.19 It is a schematic diagram of the assembly of a flange structure and a water ring according to the present invention;

[0040] Fig. 20 This is a schematic diagram of the assembly of the second flange structure and the water ring according to the present invention;

[0041] Fig.21 A schematic diagram of a clutch structure disclosed by the washing machine of the present invention;

[0042] Fig. 22 It is a schematic diagram of the structure of a washing machine with a free-draining cylinder in the prior art;

[0043] Fig.23 It is a schematic diagram of the water inlet structure of the drainage trough in the prior art;

[0044] Fig.24 Schematic diagram of the size structure of D and D0 in the prior art;

[0045] Fig.25 It is a schematic diagram of the structure of a washing machine with a transition bowl-shaped free-draining cylinder;

[0046] Fig.26 It is a schematic diagram of the size structure of a transition bowl-shaped drain trough;

[0047] Fig. 27 It is a schematic diagram of the structure of a washing machine with a water bowl type free-draining cylinder;

[0048] Fig.28 It is a top view schematic diagram of a drainage trough with a water bowl;

[0049] Fig.29 for Fig.28 A cross-sectional view of AA shown in FIG.

[0050] Among them: 1. outer barrel; 101. groove at the bottom of the outer barrel; 2. inner barrel; 3. impeller; 4. impeller shaft; 5. drainage hole; 6. flange; 601. horizontal part of the flange, 602. recessed part of the flange, 603. first connection part of the flange, 604. second connection part of the flange, 605. lateral drainage hole of the flange; 7. inverted bowl; 8. large water seal; 801. first lip; 802. lip of the outer barrel; 802a. second lip 802b. Third lip; 803. Fourth lip; 804. Large water seal groove; 9. Cavity cover; 901. Cavity cover receiving groove; 10. Drainage outlet; 11. Drain pipe; 12. Air chamber; 13. Drain valve; 14. Clutch; 15. Dehydration shaft; 16. Fastening screw; 17. Lateral drain outlet; 18. Transition connecting plate; 19. Drainage cylinder; 20. Drainage trough, 21. Water bowl, 2101. The first connection part of the water bowl; 2102. The second connection part of the water bowl; 2103. The reinforcement part of the water bowl; 2104. The water bowl channel; 2104a. The side drainage hole of the water bowl; 2104b. The bottom drainage hole of the water bowl; 2105. The middle through hole, 2106. The second connection ring, 2107. The flange of the reinforcement part, 22. The lower shell, 2201. The positioning ring, 23. The lower water seal, 2301. The fifth lip, 24 .Mounting plate, 2401. First supporting wall, 2402. Second supporting wall, 2403. Third supporting wall, 2404. Fourth supporting wall, 2405. Fifth supporting wall, 2406. Mounting plate receiving groove, 25. Transition bowl, 2501. Transition bowl lateral drainage hole, 26. Water ring, 2601. Water ring channel, 2602. Connecting ring, 27. Second drainage port, A. Water passing device, C. Water flow chamber. DETAILED DESCRIPTION

[0051] Combination Figure 2-Figure 5, is a schematic structural diagram of an embodiment of a water-saving washing machine drain device of the present invention, which includes a flange 6 for mounting an inner barrel 2 of the water-saving washing machine on a dehydration shaft 15 of a clutch 14, a drain cylinder 19 having an inner hole larger than an outer diameter of the dehydration shaft 15 being mounted and connected to the flange 6, an outer barrel 1 being disposed outside the inner barrel 2, a clutch 14 being mounted on the outer barrel 1, a cavity cover 9 being disposed on the outer barrel 1, a cavity being formed between the cavity cover 9 and the clutch 14, the lower portion of the cavity being connected to an external drain pipe 11 through a drain port 10, and the upper portion of the cavity being connected to the drain cylinder 19.

[0052] Embodiment 1:

[0053] Combination Figure 2 , Figure 4 The drain cylinder 19 is a columnar shaft bowl formed by extending outward from the upper end of the dehydration shaft 15. The columnar shaft bowl is connected to the flange 6 by a fastening screw 16, and is connected to the cavity formed by the cavity cover 9 through a lateral drain port 17.

[0054] Example 2

[0055] Combination Figure 3 , Figure 5 The discharge cylinder 19 is stepped, and its upper end is mounted on the dehydration shaft 15 through a transition connecting plate 18. The transition connecting plate 18, the dehydration shaft 15 and the flange 6 are connected as a whole through fastening screws 16, and its lower end is directly accommodated in the cavity cover 9.

[0056] Specifically, the cavity cover 9 is stepped, and its lower end is installed and connected in the mounting plate of the clutch 14; the drain cylinder 19 and the cavity cover 9 are sealed and connected via a large water seal 8; a drainage groove 20 for water and sewage is formed between the drain cylinder 19 and the clutch 14; the drain pipe 11 is connected to the air chamber cavity 12 on the washing machine, and a drain valve 13 is provided between the drain pipe 11 and the air chamber cavity 12.

[0057] Embodiment 3:

[0058] In the prior art, the fixed connection between the dehydration shaft 15 and the inner barrel 2 is either directly integrated, or the dehydration shaft 15 is directly fixed to the bottom of the outer barrel 1, but more often a flange 6 is set at the bottom of the outer barrel 1 for fixing strength considerations, and the dehydration shaft 15 and the flange 6 are fixed. The fixing parts of the dehydration shaft 15 and the flange 6 are usually: the position where the dehydration shaft 15 and the flange 6 are fixed is usually located on the horizontal plane at the bottom of the outer barrel 1. In this case, in any case, it is impossible to find a place for the water flow passage of the inner barrel 2, unless, as described in the background technology, its water hole is restricted by the diameter of the dehydration shaft 15 and the flange 6 or the connecting piece, resulting in poor water flow. In the prior art, although a recessed portion is formed at the bottom of the outer barrel 1, these practices are designed for other purposes. One of the most important structural designs of the present invention is to fix the dehydration shaft 15 and the inner barrel 2 to either be higher than or lower than the bottom of the outer barrel 1, so that the side formed by the height difference has sufficient drainage and water flow space, and / or the diameter of the fixed connection between the dehydration shaft 15 and the drainage cylinder 19 is smaller than the diameter of the inner wall of the water inlet of the drainage cylinder 19.

[0059] like Figure 6-9 As shown, the present invention discloses a washing machine structure, including an outer barrel 1, an inner barrel 2, a flange 6 and a clutch 14, the inner barrel 2 is fixedly connected to the dehydration shaft 15, the impeller 3 is fixedly connected to the impeller shaft 4, a water passing device A is arranged on the upper part of the clutch 14, the water passing device A refers to a water flow device arranged below the inner barrel 2, no drainage hole is arranged at the lower part of the inner barrel 2, the washing water in the inner barrel 2 flows to the water passing device A and then flows to the drainage structure of the washing machine, the water passing device A is connected to the inner barrel 2 through the drain cylinder 19, and a The water bowl 21 has a lower surface in the middle of the water bowl 21 forming a downward second connecting ring 2106, the fixed position of the inner barrel 2 and the dehydration shaft 15 is higher than the upper plane of the bottom of the inner barrel 2, the drain cylinder 19 forms a lateral drain port on the second connecting ring 2106, and a water bowl channel 2104 is formed between the inner wall of the second connecting ring 2106 and the impeller shaft 4, the water bowl channel 2104 is connected to the water flow chamber C of the water transfer device A, and a drain port 10 is arranged on the water transfer device A, and the drain port 10 is connected to the drainage structure of the washing machine.

[0060] Embodiment 4:

[0061] like Figure 6-9As shown in Figure 11, as an embodiment of the present invention, the drainage cylinder 19 of the water-passing device A includes a water-passing bowl 21, and the water-passing bowl 21 includes a first water-passing bowl connection portion 2101, and the first water-passing bowl connection portion 2101 is configured to fix the water-passing bowl 21 with the flange 6, and the water-passing bowl 21 is arranged below the flange 6, and a second connecting ring 2106 is formed near the center of the water-passing bowl 21, and the second connecting ring 2106 is arranged on a side away from the inner barrel 2, and a water-passing bowl lateral drainage hole 2104a is arranged at the lower part of the second connecting ring 2106, and a water-passing bowl reinforcement portion 2103 is arranged at the lower end of the second connecting ring 2106, and a water-passing bowl bottom drainage hole 2104b is arranged on the water-passing bowl reinforcement portion 2103, and the water-passing bowl bottom drainage hole 2104b is connected to the water-passing bowl lateral drainage hole 2104a, and a middle through hole 2105 for accommodating the impeller shaft 4 is arranged on the water-passing bowl reinforcement portion 2103. The water bowl second connection part 2102 is arranged on the part 2103, and the water bowl second connection part 2102 is configured to fix the water bowl 21 with the dehydration shaft 15, and the water bowl second connection part 2102 is arranged between the middle through hole 2105 and the drainage hole 2104b at the bottom of the water bowl, and the impeller shaft 4, the water bowl reinforcement part 2103, and the second connection ring 2106 are connected to the water bowl 21 through the drainage hole 2104b at the bottom of the water bowl and the side drainage hole 2104b of the water bowl. 04a forms a water bowl channel 2104b, so that the washing water flows into the water bowl channel 2104b and then flows into the water flow cavity C of the water device A through the bottom drainage hole 2104a and the side drainage hole 2104b, thereby greatly improving the water flow area of ​​the drainage cylinder 19 of the water device A. The setting of the water bowl reinforcement part 2103 ensures the connection strength between the water device A and the dehydration shaft 15 and the flange 6, thereby ensuring the reliability of the drainage of the water device A.

[0062] In the drain cylinder 19 of the water flow device A using this method, the outer surface of the second connecting ring 2106 is slidably sealed with the first lip 801 of the water flow device A, and the lower plane of the large water seal 8 is arranged above the lateral drainage hole 2104a of the water flow bowl. This arrangement ensures that the washing water in the washing tub can be completely drained, and also greatly improves the circulation efficiency of the washing water, avoiding hair or washing materials clogging the drainage groove of the water flow device A during use, thereby affecting the normal use of the washing machine; and, under this scheme, the contact surface between the second connecting ring 2106 and the water flow device A is small, so that sealing can be achieved through a smaller water seal, thereby reducing the possibility of overflow of the washing water.

[0063] Embodiment 5:

[0064] like Fig.10As shown, as an embodiment of the present invention, the drainage cylinder 19 of the water-passing device A includes another water-passing bowl 21 structure. Compared with Example 4, this scheme reduces the setting of the second connecting portion 2102 of the water-passing bowl, and directly sets a reinforcement flange 2106 at the position where the middle through hole 2105 is formed by the water-passing bowl reinforcement portion 2103. At this time, the middle through hole 2105 is a accommodating structure with space in the height direction, and the reinforcement flange 2106 is set toward the side close to the first connecting portion 2101 of the water-passing bowl. The water-passing bowl 21 under this structure is connected to the flange 6 through the first connecting portion 2101 of the water-passing bowl, and the impeller shaft 4 is fixedly connected to the middle through hole 2105 by interference fit. This setting reduces the flange set on the dehydration shaft 15, cancels the bolt connection between the water-passing bowl 21 and the dehydration shaft 15, and further ensures the sealing of the water-passing bowl structure and the clutch 4.

[0065] As an embodiment of the present invention, the assembly of the water bowl 21 of the discharge cylinder 19 and the clutch 4 can be that the water bowl 21 is bolted to the dehydration shaft 15, or the middle through hole 2105 provided on the water bowl 21 is interference fit with the impeller shaft 4, or the water bowl 21 and the upper part of the dehydration shaft 15 are integrally formed, and the upper end of the dehydration shaft 15 is made into a wide-mouth structure.

[0066] Embodiment 6:

[0067] like Fig.11Therefore, a water flow device A is disclosed, which includes a cavity cover 9 and a lower shell body 22. A cavity cover accommodating groove 901 is arranged on the cavity cover 9, and the cavity cover accommodating groove 901 is configured to position and place a large water seal 8. The large water seal 8 and the cavity cover 9 are two independent components. A first lip 801 is arranged on the other side of the large water seal 8. The first lip 801 is matched with a second connecting ring 2106 arranged on the water flow bowl 21 for sliding sealing. The water flow bowl 21 is fixedly connected to the dehydration shaft flange 332. The second connecting ring 2106 is formed on the lower surface in the middle of the water flow bowl 21 to prevent the washing water in the water flow device A from overflowing. The cavity cover 9 is hollow and connected to the lower shell body 22 provided with a drain outlet 10. The drain outlet 10 is arranged at the lowest point of the water flow device A, and a positioning ring 2201 matched with the clutch 14 is provided on the lower surface in the middle of the lower shell 22, and a lower water seal 23 is arranged between the lower shell 22, the positioning ring 2201, and the clutch 14. The lower water seal 23 refers to the seal arranged between the dehydration shaft 15 and the clutch 14 in the prior art. The cavity cover 9 is fixed to the lower shell 22 by detachable connection methods such as riveting, bolting, snapping, plugging, bolt connection, hooking, etc. The cavity cover 9 can be arranged between the inner barrel 2 and the outer barrel 1, and can also be arranged at the bottom of the outer barrel 1 of the washing machine. This arrangement facilitates the assembly of the water flow device A and the washing machine, reduces the changes to the washing machine, and thus improves the applicability of the water flow device A.

[0068] Embodiment 7:

[0069] like Fig.12 As shown, as an embodiment of the present invention, a water passing device A is disclosed. Compared with the embodiment 6, Fig.11The cavity cover 9 and the large water seal 8 of the water passing device A shown in the figure are made of the same plastic material. The large water seal 8 directly replaces the function of the original cavity cover 9. The large water seal 8 is hollow and connected to the lower shell body 22 provided with a drain outlet 10. A space for a water flow cavity C of the water passing device A is formed between the large water seal 8 and the lower shell body 22. A positioning ring 2201 adapted to the clutch 14 is provided on the lower surface in the middle of the lower shell body 22. The large water seal 8 and the lower shell body 22 are fixed by detachable connection methods such as riveting, bolting, clamping, plugging, bolting, and hooking. The difference between this scheme and embodiment 6 is that the large water seal 8 directly replaces the functions of the original large water seal 8 and the cavity cover 9. The large water seal 8 is squeezed and fixed by the second connecting ring 2106 of the bottom of the outer barrel 1 and the water bowl 21. The large water seal 8 is provided with a first lip 801 at the sliding sealing position with the second connecting ring 2106. The first lip 801 provided on the large water seal 8 is configured to seal the washing water entering the water passing device A through the drain cylinder 19. The drain cylinder 19 is configured to flow the washing water in the inner barrel 2 into the water passing device A, thereby reducing the overflow of the washing water. The large water seal 8 is provided with an outer barrel lip 802 at the connection with the lower surface of the bottom of the outer barrel 1. The large water seal 8 and / or the lower shell 22 of the water flow device A limit the horizontal displacement of the water flow device A by the limiting portion arranged on the mounting plate 24. More preferably, a fourth lip 803 is arranged at the position where the water flow device A is in sealing contact with the limiting portion on the mounting plate 24. This arrangement reduces the molding and assembly of the cavity cover 9 parts. At this time, the water flow device A only has the lower shell 22, and the water flow chamber C is formed by the dehydration shaft 15, the large water seal 8, the lower water seal 23, and the lower shell 22. The water flow device A is supported and positioned by the second connecting ring 2106, the mounting plate 24, and the outer barrel 1, which reduces the possibility of overflow of washing water and ensures the sealing of the entire water flow device A and the washing machine.

[0070] Embodiment 8:

[0071] like Fig.13As shown, as an embodiment of the present invention, a water passing device A is disclosed. Compared with Example 7, by improving the structure of the mounting plate 24, the mounting plate 24 is used to realize the function of the lower shell 22, and the setting of the lower shell 22 is cancelled. The water flow chamber C of the water passing device A is composed of a large water seal 8, a mounting plate 24, a lower water seal 23, and a clutch 14, wherein the large water seal 8 is supported and fixed by the bottom of the outer barrel 1, the mounting plate 24, and the drain cylinder 19, and the large water seal 8 is arranged in a step shape, wherein the inner side of the large water seal 8 is horizontally limited by the drain cylinder 19, the upper part of the large water seal 8 is slidably sealed with the second connecting ring 2106 of the drain cylinder 19, and a first lip 80 is arranged at the contact position between the large water seal 8 and the second connecting ring 2106 1, the first lip 801 is configured to seal the washing water entering the water passing device A through the discharge cylinder 19, so as to reduce the overflow of the washing water, the large water seal 8 is provided with an outer barrel lip 802 at the contact connection with the outer barrel 1, the contact connection of the large water seal 8 with the outer barrel 1 generally refers to the contact between the large water seal 8 and the lower surface / outer surface of the bottom of the outer barrel 1, or there is also a lateral connection contact between the large water seal 8 and the outer barrel 1, the part where the large water seal 8 is provided with the outer barrel lip 802 is assembled with the corresponding contact part of the outer barrel 1, the outer barrel 1 is configured to limit the large water seal 8 in the vertical direction or the large water seal 8 in the vertical and horizontal directions, and the large water seal 8 of the water passing device A is realized by the limiting part provided on the mounting plate 24. For positioning, supporting and cooperating the large water seal 8 to form the water flow cavity C of the water passing device A, in the embodiment described in the present invention, the limiting portion includes a first supporting wall 2401, a second supporting wall 2402, a third supporting wall 2403 and a fourth supporting wall 2404, the first supporting wall 2401 is arranged close to the bottom of the outer barrel 1, the end of the first supporting wall 2401 is connected to the second supporting wall 2402, and the second supporting wall 2402 is configured to support the bottom of the outer barrel 1. Preferably, the second supporting wall 2402 is arranged horizontally, and the third supporting wall 2403 is arranged at the other end of the second supporting wall 2402, and the third supporting wall 2403 is arranged in a direction away from the bottom of the outer barrel 1, and the third supporting wall 2403 is configured to pass The water device A is limited in the horizontal direction, and the vertical cross-section of the first support wall 2401, the second support wall 2402, and the third support wall 2403 is approximately arranged in a "J" shape from the side away from the dehydration shaft 15 to the side close to the dehydration shaft 15. As some embodiments of the present invention, the first support wall 2401 and the third support wall 2403 are arranged in a vertical direction, and the other end of the third connecting wall 2403 is provided with a fourth support wall 2404, and the fourth support wall 2404 replaces the lower shell 22 and the large water seal 8 to form an accommodating space for the water flow chamber C. The other end of the fourth support wall 2404 is connected to the fifth support wall 2405, and the fifth support wall 2405 is provided with a mounting plate accommodating groove 2406 on the side close to the dehydration shaft 15.The height of the mounting plate accommodating groove 2406 is lower than the height of the upper plane of the fourth connecting wall 2404. The mounting plate accommodating groove 2406 is configured to assemble a lower water seal 23. The lower water seal 23 refers to the seal arranged between the dehydration shaft 15 and the clutch in the prior art. A fifth lip 2301 is arranged on the other side of the lower water seal 23. The fifth lip 2301 is in contact with the clutch 14. The drain port 10 is arranged between the third supporting wall and the mounting plate accommodating groove 2406. Preferably, the drain port 10 is arranged at the lowest point of the fourth supporting wall. The outer barrel lip 802 may include a vertical second lip 802a and / or a horizontal third lip 802b. The outer side of the large water seal 8 is horizontally limited by the third supporting wall of the limiting part. The fourth lip 803 is arranged at the contact position between the large water seal 8 and the third support wall 2403. On the one hand, this arrangement reduces the number of parts. At this time, the water flow cavity C is directly formed by using the mounting plate 24, the dehydration shaft 15, the large water seal 8, and the lower water seal 23. The water flow device A is supported and positioned by the second connecting ring 2106, the mounting plate 24, and the outer barrel 1, which reduces the probability of washing water overflowing. On the other hand, it also increases the accommodation space of the water flow device A, and minimizes the change in the original structural height of the washing machine due to the installation of the water flow device A.

[0072] Alternatively, a large water seal 8 is provided at the connection between the cavity cover 9 and the bottom of the outer barrel 1, and a mounting plate 24 is provided below the bottom of the outer barrel 1, and an annular boss is provided on the mounting plate 24. The mounting plate 24 supports the outer barrel 1 through the annular boss on the one hand, and forms a cavity with the cavity cover 9 and the clutch 14 on the other hand, and the upper part of the cavity is connected to the interior of the discharge cylinder 19.

[0073] Example 9.:

[0074] like Fig.14As shown, as an embodiment of the present invention, a water passing device A is disclosed. Compared with the embodiment 8, a groove 101 at the bottom of the outer barrel is provided at the end of the outer barrel 1 close to the large water seal 8, and the groove 101 at the bottom of the outer barrel is recessed toward the side close to the inner barrel 2. The bottom of the outer barrel 1 and the limiting portion of the mounting plate 24 form a stepped accommodation space. The large water seal 8 of the water passing device A is provided in a stepped shape, and the groove 101 at the bottom of the outer barrel cooperates with the large water seal 8 for positioning and fixing. In addition, a lip 802 of the outer barrel is provided at the contact position between the lower surface / outer surface of the bottom of the outer barrel 1 and the large water seal 8. In addition, the groove 101 at the bottom of the outer barrel is also arranged in a stepped shape, and the upper surface of the large water seal 8 is also arranged below the groove 101 at the bottom of the outer barrel. In this way, the water flow device A is completely located in the space formed by the bottom of the outer barrel 1 and the mounting plate 24, and the mounting plate 24 is directly fixedly connected to the bottom of the outer barrel 1. This arrangement reduces the axial height of the inner and outer barrels of the washing machine, improves the connection stability of the inner barrel during washing and drying, and also improves the stability of the washing machine during use. At the same time, on the other hand, it also improves the sealing of the assembly between the bottom of the outer barrel and the water flow device A to avoid overflow of washing water.

[0075] Embodiment 10:

[0076] like Figure 15-18 As shown, as an embodiment of the present invention, the drainage cylinder 19 of the water passing device A is a transition bowl 25, and an upper shaft sleeve fixing portion is arranged on the dehydration shaft 15, and the upper shaft sleeve fixing portion is arranged on the outer side of the dehydration shaft 15, the transition bowl 25 is fixedly connected to the flange 6 and the upper shaft sleeve fixing portion, and the position where the transition bowl 25 is fixedly connected to the upper shaft sleeve fixing portion is higher than the position where the transition bowl 25 is connected to the flange 6, so that an inclined transition bowl lateral drainage hole 2501 is formed on the transition bowl 25, and a water passing ring 26 is arranged below the transition bowl 25, and a downward connecting ring 2602 is formed on the lower surface in the middle of the water passing ring 26, and the outer surface of the connecting ring 2602 is slidingly sealed with the first lip 701 of the water passing device A, and a water passing ring channel 2601 is formed between the connecting ring 2602 and the dehydration shaft 15, and the washing water flows into the water passing ring channel 2601 through the transition bowl lateral drainage hole 2501 on the side of the transition bowl 25, and then flows into the water flow chamber C of the water passing device A. This arrangement greatly increases the water inlet area of ​​the drainage cylinder 19 of the water flow device A by setting an inclined transition bowl lateral drainage hole 2501 on the transition bowl 25. On the premise of meeting the connection strength between the water flow device A and the flange 6, the inner barrel 2, and the dehydration shaft 15, the circulation efficiency of the washing water is improved, and hair or washing materials are prevented from clogging the drainage groove of the water flow device A during use, thereby affecting the normal use of the washing machine; and, under this scheme, the contact surface between the connecting ring 2602 and the water flow device A is small, so that sealing can be achieved through a smaller large water seal 8, thereby reducing the possibility of overflow of the washing water.

[0077] Preferably, the lateral drainage holes 2501 of the transition bowl described herein may be arranged in a right angle, arc shape, or oblique line shape, and the washing water may enter from the side of the transition bowl 25 or from the top surface and the side of the transition bowl 25 .

[0078] Preferably, the transition bowl 25 and the flange 6, and the transition bowl 25 and the water ring 26 are all connected by bolts. The bolt holes connecting the transition bowl 25 and the flange, and the bolt holes connecting the transition bowl 25 and the water ring 26 can be shared or used differently. The different use here means that the transition bowl 25 is fixedly connected to the water ring 26 and the flange using different bolt holes, respectively.

[0079] Embodiment 11:

[0080] like Figure 15-19 As shown, as an embodiment of the present invention, a flange structure is disclosed, wherein the flange 6 is fixedly connected to the bottom of the inner barrel 2, and a flange groove is formed on the flange 6 near the dehydration shaft 15, and the flange 6 includes a flange horizontal portion 601 and a flange recessed portion 602, and the flange groove is upwardly arranged in a direction away from the outer barrel 1, and a flange first connection portion 603 is formed on the top of the flange groove, and the flange first connection portion 603 is configured to be fixedly connected to the dehydration shaft 15, and the impeller shaft 4 passes through the flange first connection portion 603, and the flange 6 forms a flange second connection portion 604 near the flange groove, and the flange second connection portion 604 is formed on the flange horizontal portion 601, and the flange second connection portion 604 is configured to be connected to the water ring 2 6 is fixedly connected, the height of the first flange connection part 603 is higher than the height of the second flange connection part 604, the first flange connection part 603 and the second flange connection part 604 form a height difference, a flange lateral drainage hole 605 is provided between the first flange connection part 603 and the second flange connection part 604, a downward connecting ring 2602 is formed on the lower surface of the middle of the water ring 26, a water ring channel 2601 is formed between the connecting ring 2602 and the dehydration shaft 15, the washing water in the inner tub 2 flows to the water ring channel 2601 through the flange lateral drainage hole 2105, and then flows to the water device A, the connecting ring 2602 and the large water seal 8 of the water device A are slidably sealed, and a first lip 801 is provided at the contact connection between the connecting ring 2602 and the large water seal 8. This setting changes the flange structure, and the flange lateral drainage hole is provided to greatly increase the water inlet of the water device A under the premise of ensuring the flange connection strength.

[0081] Preferably, the flange lateral drainage hole 2105 here can be set in a right angle, arc shape, or oblique line shape, and the washing water can enter from the side of the flange 6 or from the top surface and side of the flange 6.

[0082] Embodiment 12:

[0083] like Fig. 20 As shown, as an embodiment of the present invention, a connection structure between a flange and a water ring 26 is disclosed. Compared with Example 11, a transition bowl 25 is provided between the flange 6 and the water ring 26. The fixing method of the transition bowl 25, the flange 6, the water ring 26 and the dehydration shaft 15 is the same as the drainage groove of the water device A disclosed in Example 10. With this fixing method, the flange 6 may only include a flange horizontal portion 601, and a flange second connection portion 2104 connected to the transition bowl 25 and the water ring 26 is provided on the flange horizontal portion 601; the flange 6 may also include a flange horizontal portion 2101 and a flange recessed portion 2102 at the same time, and the flange recessed portion 2102 and the transition bowl 25 are matched. This setting further improves the applicability of the assembly of the water device A and the drum of the washing machine on the premise of increasing the water inlet area of ​​the water device A.

[0084] Embodiment 13:

[0085] like Fig.21As shown, as an embodiment of the present invention, a clutch structure is disclosed, in which the water passing device A described in embodiments 11 to 14 is arranged on the upper side of the mounting plate 24, or the water flow chamber C of the water passing device A is formed by the upper plane of the mounting plate 24 or the upper plane of the mounting plate 24 and the side plane close to the dehydration shaft 15 in the vertical direction, and the water passing device A includes a large water seal 8 fixed on the clutch 14, and a water passing ring 26 / water passing bowl 21 is connected to the bottom of the flange 6, and the water passing ring 26 / water passing bowl 21 can be fixedly connected to the dehydration shaft 15, and the water passing ring 26 / water passing bowl 21 can also be fixedly connected to the flange 6 or the water passing ring 26 / water passing bowl 21 is fixedly connected to the dehydration shaft 15 and the flange 6 at the same time, and a downward connecting ring 2602 or a downward connecting ring 2602 is formed on the lower surface in the middle of the water passing ring 26. The first is that a downward second connecting ring 2106 is formed on the lower surface in the middle of the water bowl 21, and a large water seal groove 804 is arranged on the upper surface of the large water seal 8, and the large water seal groove 804 is inserted into the ring around the water passing device A, and the large water seal 8 is close to the side of the dehydration shaft 15 and is slidably sealed with the outer wall of the connecting ring 2602 / the second connecting ring 2106. The large water seal 8 is provided with a first lip 801 at the contact point with the connecting ring 2602 / the second connecting ring 2106, and the middle part of the outer barrel bottom is directly pressed on the large water seal 8 or the outer barrel bottom groove 1901 arranged on the outer barrel 1 is pressed on the large water seal 8. The large water seal 8 is provided with an outer barrel lip 802 at the position where the outer barrel bottom is connected to the lower surface / outer surface of the outer barrel bottom to play a sealing role, and a drain outlet 10 is provided on the mounting plate 24 or the drain outlet 10 is directly formed. Compared with the prior art, the technical solution increases the length of the dehydration shaft 15, and sets the main body of the water-passing device A between the bottom of the outer barrel and the mounting plate 24, thereby avoiding adjustment of the height between the inner barrel 2 and the outer barrel 1, and greatly improving the applicability of the reduction clutch for assembly on the existing washing machine. Compared with the existing structure of setting the water-passing device A, the axial height between the inner barrel 2 and the outer barrel 1 is greatly reduced, thereby ensuring the stability of the washing machine during the washing process, and also improving the coaxiality of the water-passing device A and the shaft sleeve on the reduction clutch, thereby ensuring the sealing of the assembly of the water-passing device A.

[0086] Furthermore, the deceleration clutch also includes a form in which a space is reserved on the deceleration clutch for installing the water-passing device A. The clutch 14 and the water-passing device A are separately arranged and installed, and are assembled when the whole machine is assembled.

[0087] Embodiment 14:

[0088] like Figure 22-29As shown, the present invention discloses an example of calculating the flow area of ​​water flowing into the drainage cylinder, wherein D refers to the diameter of the outer edge of the water inlet structure, that is, the outer edge diameter of the connecting ring or the second connecting ring; D0 refers to the diameter of the opening for connecting the water inlet structure with the clutch washing shaft; D1 refers to the outer diameter of the drainage hole on the water inlet structure in the prior art; D2 refers to the inner diameter of the drainage hole on the water inlet structure in the prior art; D3 refers to the inner diameter of the water flow hole on the transition bowl; D5 refers to the inner diameter of the water flow hole on the water bowl;

[0089] In the prior art, Figures 22 to 25 As shown, the water inlet structure of the drainage cylinder 19 is provided as a coupling, the drainage hole is vertically provided between the inner and outer walls of the coupling, and the coupling is fixedly connected to the flange through the connecting hole A. In order to ensure the stability of the connection between the coupling and the flange and the strength of the water inlet structure, four connecting holes are generally provided to fix the coupling and the flange. Therefore, in the prior art solution, the minimum water flow area is:

[0090] S1=a1((0.5D1) 2 -(0.5D2) 2 *π

[0091] Wherein, a1 is the virtual-real coefficient, which is about 0.7, because the position of the drain hole must be designed between the coupling and the connection hole at the bottom of the flange, and the virtual-real coefficient is the minimum value that must be met under strength;

[0092] In the prior art, in order to ensure the sealing effect, a sealing ring is generally provided at the connection between the water inlet structure and the inner tube flange. However, if the width of the sealing ring is too small, it is very easy to be crushed during use, thereby affecting the sealing effect. Normally, in order to prevent the sealing ring from being crushed, the sealing ring adopts the same structural design as the water inlet structure and the flange connection. The thickness between the inner wall of the drainage hole on the water inlet structure and the upper sleeve should be at least not less than 5mm. Therefore, the thickness between the outer wall of the drainage hole on the water inlet structure and the outer wall of the water inlet structure should also be not less than 5mm. Accordingly, in the prior art solution, the outer diameter D1 and inner diameter D2 of the drainage hole on the water inlet structure are respectively:

[0093] D1=D-10; D2=D0+10.

[0094] When the water inlet structure of the discharge cylinder is adopted Figures 25-26 In the transition bowl structure, an inclined transition bowl lateral drainage hole 2501 is provided on the transition bowl, and the dehydration shaft 15 cooperates with the connection hole opened in the drainage cylinder 19 and is fixedly connected thereto. After the washing water flows through the water hole, it flows into the water flow device A through the space formed between the dehydration shaft 15 and the connecting ring 2602. Under this scheme: the minimum water flow area is:

[0095] S2=a2((0.5D3) 2-(0.5D0) 2 *π

[0096] Among them, a2 is the virtual-real coefficient, which is approximately 1. The position of the water hole can completely fill the space between the connection position between the transition bowl and the dehydration shaft 15 and the connection position between the transition bowl and the flange. The virtual-real coefficient must meet the minimum value under strength, D3=D-3, and the total area of ​​the water holes on the transition bowl is much larger than this area.

[0097] When the drain cylinder 19 of the water-passing device A adopts Figures 27-29 In the water bowl structure, the water bowl is fixedly connected to the dehydration shaft through the second connection part 2102 of the water bowl, and a water bowl channel 2104 is formed between the second connection ring 2106 of the water bowl structure and the impeller shaft 4. The water bowl channel 2104 can be opened at the lower part of the second connection ring 2106 of the water bowl structure to increase the water flow area of ​​the water bowl channel 2104. A water seal is provided on the outside of the second connection ring 2106, and the height of the water seal is set higher than the position of the water flow of the lateral drainage hole 2104a of the water bowl. Under this scheme: the minimum water flow area is:

[0098] S3=a3((0.5D5) 2 -(0.5D0) 2 *π

[0099] Among them, a3 is the virtual-real coefficient, which is about 0.8. The water bowl reinforcement portion set at the bottom of the water bowl has a little influence on the outflow of washing water. The virtual-real coefficient must meet the minimum value under the strength, D5=D-6.

[0100] In the calculation examples described above, the units of D, D0, D1, D2, D3, and D5 are all mm.

[0101] As some embodiments of the present invention, D0=30 (a general value in the prior art), D=72 (a general value in the prior art, such as TCL commercially available washing machines), D0=30, D=72, D1=62, D2=40, D3=69, D5=66, and calculation yields: S1=392.7π; S2=965.25π; S3=691.2π.

[0102] As mentioned above, as the outer edge diameter of the drain cylinder 19 increases, the size of the water seal also gradually increases, and the possibility of water leakage increases accordingly. Therefore, the calculation results show that when the water flow area is constant, the present invention can significantly reduce the outer edge diameter of the drain cylinder 19. Therefore, within a certain range, the water flow area and the outer edge diameter of the drain cylinder 19 can be optimized, and a larger water flow area can be obtained while the outer edge diameter of the drain cylinder 19 is smaller.

[0103] Specifically, when the outer edge diameter D of the drain cylinder 19 is 60, S2 is 587.25π, and when the outer edge diameter D of the drain cylinder 19 is 55, S2 is 451π. Under this condition, the outer edge diameter of the drain cylinder 19 is much smaller than the value 72 of the outer edge diameter of the drain cylinder 19 in the prior art, and the water flow area of ​​the drain cylinder 19 is larger than the water flow area S1 of the drain cylinder 19 in the prior art.

[0104] In addition, when the outer edge diameter of the drain cylinder 19 is D=50, S2=412.25π, and when the outer edge diameter of the drain cylinder 19 is D=45, S2=216π.

[0105] As the outer edge diameter of the drain cylinder 19 decreases, the size of the water seal also decreases, and the possibility of water leakage will decrease exponentially or exponentially.

[0106] Therefore, when the drain cylinder 19 of the water flow device A adopts a water flow bowl or a transition bowl, the water inlet volume of the drain cylinder 19 is much larger than the water inlet volume of the prior art solution. This arrangement greatly increases the water inlet area of ​​the water flow device A, ensures the drainage efficiency, and avoids the drain cylinder 19 of the water flow device A from being blocked by hair or laundry, thereby affecting the normal use of the washing machine.

[0107] In the embodiment described in the present invention, the first lip 801, the outer barrel lip 802, the second lip 802a, the third lip 802b, the fourth lip 804 and the fifth lip 2301 only need to be sealed and connected to prevent the washing water from overflowing. They can also be sealing smooth surfaces, and form a sealing position through interference fit contact or compression.

[0108] It should be pointed out that, for those skilled in the art, several improvements and modifications may be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A water-saving washing machine drain device, comprising a flange (6) for mounting an inner drum (2) of the water-saving washing machine on a dehydration shaft (15) of a clutch (14), characterized in that: A drain cylinder (19) having an inner hole larger than the outer diameter of the dehydration shaft (15) is installed and connected to the flange (6); an outer barrel (1) is disposed outside the inner barrel (2); a clutch (14) is installed on the outer barrel (1); a cavity cover (9) is provided on the outer barrel (1); a cavity is formed between the cavity cover (9) and the clutch (14); the lower part of the cavity is connected to an external drain pipe (11) through a drain port (10); and the upper part of the cavity is connected to the drain cylinder (19); The fixed positions of the dehydration shaft (15) and the inner barrel (2) are either higher than the bottom of the outer barrel (1) or lower than the bottom of the outer barrel (1), so that the side formed by the height difference has sufficient drainage and water flow space, and / or the diameter of the fixed connection between the dehydration shaft (15) and the drainage cylinder (19) is smaller than the diameter of the inner side wall of the water inlet of the drainage cylinder (19); The inner tub (2) is fixedly connected to the dehydration shaft (15), the impeller (3) is fixedly connected to the impeller shaft (4), a water-passing device A is arranged on the upper part of the clutch (14), the washing water in the inner tub (2) flows through the water-passing device A and then flows to the drainage structure of the washing machine, the water-passing device A is connected to the inner tub (2) through the drainage cylinder (19), a water-passing bowl (21) is arranged below the flange (6), and the lower surface of the middle of the water-passing bowl (21) forms a downward second connecting ring (2106) ), the fixing position of the inner barrel (2) and the dehydration shaft (15) is higher than the upper plane of the bottom of the inner barrel (2), the drainage cylinder (19) forms a lateral drainage port on the second connecting ring (2106), a water bowl passage (2104) is formed between the inner wall of the second connecting ring (2106) and the impeller shaft (4), the water bowl passage (2104) is connected to the water flow chamber C of the water flow device A, and a drainage port (10) is provided on the water flow device A, and the drainage port (10) is connected to the drainage structure of the washing machine; The drainage cylinder (19) of the water-passing device A comprises a water-passing bowl (21), the water-passing bowl (21) comprising a first water-passing bowl connection portion (2101), the first water-passing bowl connection portion (2101) being configured to fixedly connect the water-passing bowl (21) to the flange (6), a second connection ring (2106) being formed near the center of the water-passing bowl (21), the second connection ring (2106) being arranged on a side away from the inner barrel (2), a water-passing bowl reinforcement portion (2103) being arranged at the lower end of the second connection ring (2106), a middle through hole (2105) for accommodating the impeller shaft (4) being arranged on the water-passing bowl reinforcement portion (2103), a water-passing bowl second connection portion (2102) being arranged on the water-passing bowl reinforcement portion (2103), the water-passing bowl second connection portion (2102) being configured to fixedly connect the water-passing bowl (21) to the dehydration shaft (15); A water bowl lateral drainage hole (2104a) is provided at the lower part of the second connecting ring (2106), and a water bowl bottom drainage hole (2104b) is provided on the water bowl reinforcement part (2103); the water bowl bottom drainage hole (2104b) and the water bowl lateral drainage hole (2104a) are connected; the impeller shaft (4), the water bowl reinforcement part (2103), and the second connecting ring (2106) form a water bowl channel through the water bowl bottom drainage hole (2104b) and the water bowl lateral drainage hole (2104a); washing water flows into the water bowl channel through the bottom drainage hole and the lateral drainage hole and flows into the water flow cavity C of the water transfer device A.

2. The water-saving washing machine drain device according to claim 1, characterized in that: The drainage cylinder (19) is a columnar shaft bowl formed by extending outward from the upper end of the dehydration shaft (15). The columnar shaft bowl is connected to the flange (6) through a fastening screw (16) and is connected to the cavity formed by the cavity cover (9) through a lateral drainage port (17).

3. The water-saving washing machine drain device according to claim 1, characterized in that: The drainage cylinder (19) is stepped, and its upper end is mounted on the dehydration shaft (15) via a transition connecting plate (18). The transition connecting plate (18), the dehydration shaft (15) and the flange (6) are connected as a whole via fastening screws (16), and its lower end is directly accommodated in the cavity cover (9).

4. The water-saving washing machine drain device according to any one of claims 1 to 3, characterized in that: The cavity cover (9) is in a stepped shape, and its lower end is installed and connected in the mounting plate of the clutch (14).

5. The water-saving washing machine drain device according to any one of claims 1 to 3, characterized in that: The drainage cylinder (19) and the cavity cover (9) are sealed and connected via a large water seal (8).

6. The water-saving washing machine drain device according to any one of claims 1 to 3, characterized in that: A drainage groove (20) for draining water and sewage is formed between the drainage cylinder (19) and the clutch (14).

7. The water-saving washing machine drain device according to any one of claims 1 to 3, characterized in that: The drainage pipe (11) is connected to the air chamber cavity (12) on the washing machine, and a drainage valve (13) is provided between the drainage pipe (11) and the air chamber cavity (12).

8. A water-saving washing machine drain device according to claim 1, characterized in that: The outer surface of the second connecting ring (2106) is connected to the large water seal (8), the first lip (801) provided on the large water seal (8) and the second connecting ring (2106) are slidably sealed, and the lower plane of the large water seal (8) is provided above the lateral drainage hole (2104a) of the water bowl.

9. A water-saving washing machine drain device according to claim 1, characterized in that: The water-passing device A comprises a cavity cover (9) and a lower shell (22). A cavity cover receiving groove (901) is provided on the cavity cover (9). The cavity cover receiving groove (901) is configured to position and place a large water seal (8). A first lip (801) is provided on the other side of the large water seal (8). The first lip (801) is matched with a second connecting ring (2106) provided on the water-passing bowl (21) for sliding sealing. The water-passing bowl (21) is fixedly connected to the dehydration shaft flange (332). A second connecting ring (2106) is formed on the lower surface in the middle of the water bowl (21); the cavity cover (9) is hollow and connected to a lower shell body (22) provided with a water outlet (10); a positioning ring (2201) adapted to the clutch (14) is provided on the lower surface in the middle of the lower shell body (22); a lower water seal (23) is provided between the lower shell body (22), the positioning ring (2201), and the clutch (14); and the cavity cover (9) and the lower shell body (22) are fixed by a detachable connection.

10. A water-saving washing machine drain device according to claim 9, characterized in that: The cavity cover (9) and the large water seal (8) of the water-passing device A are both made of the same plastic material, and the cavity cover (9) and the large water seal (8) are integrally formed.

11. A water-saving washing machine drain device according to claim 1, characterized in that: The water flow chamber C of the water flow device A is composed of a large water seal (8), a mounting plate (24), a lower water seal (23), and a clutch (14). The large water seal (8) is supported and fixed by the bottom of the outer barrel (1), the mounting plate (24), and the drainage cylinder (19). The large water seal (8) is arranged in a step-like shape. The inner side of the large water seal (8) is horizontally limited by the drainage cylinder (19). The upper part of the large water seal (8) is slidably sealed with the second connecting ring (2106) of the drainage cylinder (19). The outer barrel (1) is configured to limit the large water seal (8) in the vertical direction or to limit the large water seal (8) in the vertical and horizontal directions. The large water seal (8) of the water flow device A is positioned, supported, and matched to form the water flow chamber C of the water flow device A through the limiting part arranged on the mounting plate (24).

12. A water-saving washing machine drain device according to claim 11, characterized in that: An outer barrel bottom groove (101) is provided at an end of the outer barrel (1) close to the large water seal (8), the outer barrel bottom groove (101) being recessed toward a side close to the inner barrel (2), the outer barrel (1) bottom and the limiting portion of the mounting plate (24) forming a stepped accommodation space, the large water seal (8) of the water passing device A being arranged in a stepped shape, the outer barrel bottom groove (101) being matched with the large water seal (8) for positioning and fixing, and the water passing device A being completely located in the space formed by the outer barrel (1) bottom and the mounting plate (24).

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