A drum washing machine

Abstract

The present application discloses a drum washing machine. The drum washing machine comprises an outer drum and an inner drum rotatably arranged in the outer drum, the outer drum comprises a drainage area with a drainage port and a non-drainage area with an opening, and a blocking structure is arranged between the outer drum and the inner drum to prevent water in the drainage area from flowing into the non-drainage area. By arranging the blocking structure between the outer drum and the inner drum, water is prevented from flowing from the drainage area into the non-drainage area, thereby preventing water from flowing out of the opening of the non-drainage area, and pollution caused by leakage of washing sewage is avoided.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and more specifically, relates to a drum washing machine. Background Technology

[0002] In existing drum washing machines, the drum typically has a shell, with an outer drum inside to hold the washing water. Inside the outer drum is a inner drum to hold the laundry. A shaft is located at the bottom of the drum, and a motor is located on the back of the outer drum to drive the shaft and thus rotate the drum. However, current drum washing machines generally accumulate a large amount of dirt between the inner and outer drums. To avoid contaminating the washing water, the applicant previously proposed a perforated drum washing machine that combines the inner and outer drums into one, thus overcoming the problem of dirt accumulation between them.

[0003] Existing non-perforated drum washing machines include a shell, an outer drum and an inner drum housed within the shell. The inner drum is rotatably housed within the outer drum, and the outer drum and inner drum are coaxially arranged. The inner drum wall has no holes, but a one-way centrifugal valve is provided on the inner drum wall. The outer drum wall has a drain outlet. The main purpose of the outer drum is to collect the drainage from the inner drum and the drainage from the high-speed centrifugal flow of the inner drum. When the inner drum is centrifugally draining, the centrifugal wastewater enters the outer drum and is then discharged to the outside through the drain outlet on the outer drum wall. After the centrifugal wastewater enters the outer drum, it leaks out of the outer drum through other openings besides the drain outlet, causing the wastewater to contaminate the areas to which the wastewater leaks.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a drum washing machine that prevents water from flowing from the drainage area into the non-drainage area by setting a blocking structure between the outer drum and the inner drum, thereby preventing water from flowing out of the opening in the non-drainage area and achieving the purpose of avoiding pollution caused by the leakage of washing wastewater.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] The present invention provides a drum washing machine, including an outer drum and an inner drum rotatably disposed inside the outer drum. The outer drum includes a drainage area with a drain outlet and a non-drainage area with an opening. A blocking structure is provided between the outer drum and the inner drum to prevent water in the drainage area from flowing into the non-drainage area.

[0008] Furthermore, the blocking structure includes a first annular baffle formed by a radially protruding ring from the inner circumferential wall of the outer cylinder, or the blocking structure includes a first annular baffle formed by a radially protruding ring from the inner circumferential wall of the outer cylinder and a second annular baffle formed by a radially protruding ring from the outer circumferential wall of the inner cylinder.

[0009] Furthermore, there is a first gap between the inner circumference of the first annular baffle and the outer circumference of the inner cylinder, and a second gap between the outer circumference of the second annular baffle and the inner circumference of the outer cylinder. The first annular baffle and the second annular baffle are arranged at intervals along the axial direction, and the first annular baffle and the second annular baffle have overlapping portions.

[0010] Furthermore, the first and second annular retaining ribs are sequentially arranged along the direction from the drainage zone to the non-drainage zone.

[0011] Furthermore, the inner cylinder includes a cylinder with an end opening and a flange that seals the end opening of the cylinder. The outer periphery of the flange extends radially toward the inner peripheral wall of the outer cylinder to form a radial rolled edge that wraps around the second annular retaining rib. There is a second gap between the outer peripheral side of the radial rolled edge and the inner peripheral wall of the outer cylinder.

[0012] Furthermore, a notch is provided on the outer periphery of the first annular retaining rib, and the notch and the inner peripheral wall of the outer cylinder form an axially extending residual water hole. The residual water hole connects the drainage area and the non-drainage area, and the radially rolled edge protrudes towards the inner peripheral wall of the outer cylinder to the side of the notch opposite to the inner peripheral wall of the outer cylinder.

[0013] Furthermore, the outer cylinder includes a drainage zone formed by the outer cylinder wall and two non-drainage zones formed by the two end walls of the outer cylinder. The two non-drainage zones are respectively provided with an outer cylinder opening and a ventilation opening. The outer cylinder opening and the ventilation opening serve as openings. The blocking structure includes a front first annular baffle and a front second annular baffle near the outer cylinder opening and a rear first annular baffle and a rear second annular baffle near the ventilation opening.

[0014] Furthermore, the outer cylinder wall is stepped along the axial direction. The outer cylinder wall includes a front cylinder wall and a rear cylinder wall. The rear cylinder wall protrudes inward relative to the front cylinder wall. The first annular baffle is located at the front end of the front cylinder wall, and the first annular baffle is located on the rear cylinder wall and close to the rear end of the front cylinder wall. The size of the first annular baffle gradually decreases from the outside to the inside.

[0015] Furthermore, the cylinder is provided with a front flange that blocks the front opening and a rear flange that blocks the rear opening at both ends. The front flange is provided with a front radial flange and the rear flange is provided with a rear radial flange. The front radial flange is located at the front end of the first annular baffle and the rear radial flange is located at the rear end of the first annular baffle.

[0016] Furthermore, the inner cylinder is a water-holding cylinder, and a centrifugal valve is provided on the inner cylinder wall to drain the water inside the inner cylinder into the drainage area.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] By setting a barrier structure between the outer and inner cylinders, water is prevented from flowing from the drainage area into the non-drainage area, thereby preventing water from flowing out of the opening in the non-drainage area and avoiding pollution caused by the leakage of washing wastewater.

[0019] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a drum washing machine according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view at point A;

[0023] Figure 3 for Figure 1 Enlarged view at point B;

[0024] Figure 4 A schematic diagram of the structure of a drum washing machine provided in another embodiment of the present invention;

[0025] Figure 5 for Figure 4 Enlarged view at point A.

[0026] Icons: 1-Outer shell; 2-Outer cylinder; 21-Drainage area; 211-Outer cylinder wall; 2111-Front cylinder wall; 2112-Rear cylinder wall; 212-Drain outlet; 22-Front non-drainage area; 221-Outer cylinder front end wall; 23-Rear non-drainage area; 231-Outer cylinder rear end wall; 24-Opening; 241-Outer cylinder opening; 242-Ventilation opening; 25-Cylinder body; 26-Annular protrusion; 3-Inner cylinder; 31-Inner cylinder wall; 32-Front flange; 33-Rear flange; 34-Front radial flange; 35-Rear radial flange; 36-Inner cylinder air inlet; 361-First step; 362-Second step; 363-Inclined wall; 37-Inner cylinder air outlet; 38-Inner cylinder opening; 4-Blocking structure; 41-Front first annular 42-Rear first annular baffle; 43-Front second annular baffle; 44-Rear second annular baffle; 5-Front first gap; 6-Rear first gap; 7-Front second gap; 8-Rear second gap; 9-Front residual water hole; 10-Rear residual water hole; 11-Centrifugal valve; 12-Drying air duct; 121-First air duct; 1211-Air outlet of the first air duct; 122-Second air duct; 1221-First sub-air duct; 1222-Second sub-air duct; 13-Clothing loading port; 14-Door body; 15-Front panel; 151-Outer shell ventilation port; 16-Annular window gasket; 17-Sealing ring; 18-Inner cylinder door; 181-Air inlet area; 1811-First area; 1812-Second area; 19-Positioning groove.

[0027] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figure 1-3 As shown, the present invention provides a drum washing machine, including an outer drum 2 and an inner drum rotatably disposed inside the outer drum 2. The outer drum 2 includes a drainage area 21 with a drain outlet 212 and a non-drainage area with an opening 24. A blocking structure 4 is provided between the outer drum 2 and the inner drum to prevent water in the drainage area 21 from flowing into the non-drainage area.

[0032] In an embodiment of the present invention, a blocking structure 4 is provided between the outer cylinder 2 and the inner cylinder to prevent water from flowing from the drainage area 21 into the non-drainage area, thereby preventing water from flowing out from the opening 24 of the non-drainage area and thus avoiding pollution caused by the leakage of washing wastewater.

[0033] A drum washing machine includes a casing 1, an outer drum 2 and an inner drum disposed inside the casing 1. The front end of the casing 1 is provided with a clothes loading port, the front end of the outer drum is provided with an outer drum opening 241, and the front end of the inner drum is provided with an inner drum opening. The clothes loading port, the outer drum opening 241 and the inner drum opening are coaxially arranged. The outer drum wall 211 is provided with a drain outlet 212, and the water in the inner drum is drained into the outer drum 2 and then discharged to the outside through the drain outlet 212. The inner drum can be a perforated inner drum or a non-perforated inner drum. When the inner drum is a perforated inner drum, the outer drum 2 is a water-holding drum. When the inner drum is a non-perforated inner drum, the inner drum is a water-holding drum.

[0034] Furthermore, the inner cylinder can be a non-perforated inner cylinder, which is a water-holding cylinder. A centrifugal valve 11 is provided on the inner cylinder wall 31. When the inner cylinder centrifugally drains water into the outer cylinder 2, the centrifugal valve 11 opens to drain the water in the inner cylinder into the outer cylinder 2. Specifically, the centrifugal valve 11 opens to drain the water in the inner cylinder into the drainage area 21 of the outer cylinder 2. The centrifugal valve 11 is provided on the inner cylinder wall 31 corresponding to the drainage area 21.

[0035] like Figure 1-3 As shown, in an embodiment of the present invention, the blocking structure 4 includes a first annular baffle formed by a radial protrusion of the inner circumferential wall of the outer cylinder, or the blocking structure 4 includes a first annular baffle formed by a radial protrusion of the inner circumferential wall of the outer cylinder and a second annular baffle formed by a radial protrusion of the outer circumferential wall of the inner cylinder.

[0036] In an embodiment of the present invention, the blocking structure 4 includes a first annular baffle, which is formed by a radial protrusion of one ring from the inner peripheral wall of the outer cylinder. The first annular baffle can abut against the outer peripheral wall of the inner cylinder or have a gap with the outer peripheral wall of the inner cylinder, so as to block water with the first annular baffle.

[0037] In another embodiment, the blocking structure 4 includes a first annular baffle and a second annular baffle. The first annular baffle is formed by a radially protruding ring from the inner circumferential wall of the outer cylinder, and the second annular baffle is formed by a radially protruding ring from the outer circumferential wall of the inner cylinder. The first annular baffle can abut against the outer circumferential wall of the inner cylinder or have a gap between them, so as to block water. The second annular baffle can abut against the inner circumferential wall of the outer cylinder or have a gap between them, so as to block water.

[0038] like Figure 2 and Figure 3 As shown, further, there is a first gap between the inner circumference of the first annular baffle and the outer circumference of the inner cylinder, and a second gap between the outer circumference of the second annular baffle and the inner circumference of the outer cylinder. The first annular baffle and the second annular baffle are arranged at a distance along the axial direction. The first annular baffle and the second annular baffle have overlapping parts. Water is blocked by the cooperation of the first annular baffle and the second annular baffle. Under the premise of ensuring that there is a gap between the first annular baffle and the second annular baffle, water is prevented from passing through the gap formed by the gap between the two.

[0039] After prolonged use, dirt will accumulate between the inner drum 3 and the outer drum 2 of the washing machine. This dirt includes sewage dirt and other dirt. In order to facilitate the subsequent dirt removal of the drainage area 21 and non-drainage area of ​​the outer drum 2 and to prevent the drainage area 21 and non-drainage area of ​​the outer drum from becoming dead zones that cannot be treated, the first annular baffle is set with a gap between it and the outer peripheral wall of the inner drum, and the second annular baffle is set with a gap between it and the inner peripheral wall of the outer drum. The first annular baffle and the second annular baffle are set with a distance along the axial direction, so that the drainage area 21 and non-drainage area of ​​the outer drum 2 can be treated with dirt through the gap.

[0040] The blocking structure 4 includes a first annular baffle and a second annular baffle. The first annular baffle and the second annular baffle can play a dual blocking role for water flow, strengthening the blocking strength of water flow in the drainage zone 21. The first annular baffle and the second annular baffle are arranged along the axial direction and are arranged sequentially from the drainage zone 21 to the non-drainage zone. That is, the first annular baffle is closer to the drainage zone 21, which enhances the blocking strength of water flow.

[0041] The first and second annular retaining ribs extend radially, and the radial cross-sections of the first and second annular retaining ribs can be rectangular, square, sector-shaped, etc.

[0042] The first annular baffle extends beyond the outer periphery of the second annular baffle, and the second annular baffle extends beyond the inner periphery of the first annular baffle, such that the radial extension dimension of the second annular baffle is greater than the radial extension dimension of the first gap, and the radial extension dimension of the first annular baffle is greater than the radial extension dimension of the second gap, so that the first annular baffle and the second annular baffle can effectively block water.

[0043] like Figure 1-3 As shown, based on the above embodiment, specifically, the outer cylinder 2 includes a drainage area 21 formed by the outer cylinder wall 211 and two non-drainage areas formed by the two end walls of the outer cylinder. The two non-drainage areas are respectively provided with an outer cylinder opening 241 and a ventilation opening 242. The outer cylinder opening 241 and the ventilation opening 242 serve as openings 24. The blocking structure 4 includes a front first annular baffle 41 and a front second annular baffle 43 near the outer cylinder opening 241 and a rear first annular baffle 42 and a rear second annular baffle 44 near the ventilation opening 242.

[0044] There is a first gap 5 between the first annular baffle 41 and the outer peripheral wall of the inner cylinder, a second gap 7 between the second annular baffle 43 and the inner peripheral wall of the outer cylinder, a first gap 6 between the first annular baffle 42 and the outer peripheral wall of the inner cylinder, and a second gap 8 between the second annular baffle 44 and the inner peripheral wall of the outer cylinder.

[0045] The two non-drainage zones are the front non-drainage zone 22 and the rear non-drainage zone 23. The front non-drainage zone 22 is the front end wall 221 of the outer cylinder and has an outer cylinder opening 241, which serves as an opening 24. The rear non-drainage zone 23 is the rear end wall 231 of the outer cylinder and has a ventilation opening 242 for connecting to the drying air duct and introducing hot air into the inner cylinder. In order to prevent water from leaking from the outer cylinder opening 241 and the ventilation opening 242, a front first annular baffle 41 and a front second annular baffle 43 are provided on the outer cylinder wall 211 near the outer cylinder opening 241, and a rear first annular baffle 42 and a rear second annular baffle 44 are provided on the outer cylinder wall 211 near the ventilation opening 242. Furthermore, since the vent 242 is connected to the drying pipe, in order to reduce the amount of hot air entering between the inner and outer cylinders and thus reduce thermal efficiency, the first and second rear annular baffles also serve to prevent more hot air from entering the drainage area.

[0046] like Figure 3 As shown, the outer cylinder wall 211 is stepped along the axial direction. The outer cylinder wall 211 includes a front cylinder wall 2111 and a rear cylinder wall 2112. The rear cylinder wall 2112 protrudes inward relative to the front cylinder wall 2111. The front first annular baffle 41 is provided at the front end of the front cylinder wall 2111, and the rear first annular baffle 42 is provided on the rear cylinder wall 2112 and close to the rear end of the front cylinder wall 2111. The size of the first annular baffle gradually decreases from the outside to the inside.

[0047] The size of the first annular baffle gradually decreases from the outside to the inside, giving the first annular baffle a certain degree of inclination. When a small amount of water flows from the drainage area 21 into the non-drainage area through the first gap, the first annular baffle, due to its certain degree of inclination, can prevent water from accumulating on the first annular baffle.

[0048] In an embodiment of the present invention, a notch is provided on the outer periphery of the first annular baffle, and the notch and the inner peripheral wall of the outer cylinder form an axially extending residual water hole. The residual water hole connects the drainage area 21 and the non-drainage area. The radially rolled edge protrudes toward the inner peripheral wall of the outer cylinder to the side of the notch opposite to the inner peripheral wall of the outer cylinder.

[0049] like Figure 2 and Figure 3 As shown, in an embodiment of the present invention, a front notch is provided on the outer periphery of the front first annular baffle 41, and the front notch and the inner peripheral wall of the outer cylinder form an axially extending front residual water hole 9; a rear notch is provided on the outer periphery of the rear first annular baffle 42, and the rear notch and the inner peripheral wall of the outer cylinder form an axially extending rear residual water hole 10.

[0050] Water entering the front non-drainage zone 22 can flow back to the drainage zone through the front residual water hole 9, and water entering the rear non-drainage zone 23 can flow back to the drainage zone 21 through the rear residual water hole 10. The addition of residual water holes can prevent excessive water accumulation in the non-drainage zone.

[0051] The front notch and the inner wall of the outer cylinder form the front residual water hole 9, and the rear notch and the inner wall of the outer cylinder form the rear residual water hole 10, so that the front residual water hole 9 and the rear residual water hole 10 are in the lowest position, so that water can flow back to the drainage area 21 through the residual water hole relatively easily.

[0052] The rear cylinder wall 2112 of the outer cylinder protrudes inward relative to the front cylinder wall 2111. The rear cylinder wall 2112 is set higher than the front cylinder wall 2111, so that there is a height difference between the rear cylinder wall 2112 and the front cylinder wall 2111. The first annular baffle 42 is set at the front end of the rear cylinder wall 2112, so that water flows from the high position of the rear cylinder wall 2112 into the low position of the front cylinder wall 2111 through the rear residual water hole 10, thus accelerating the return flow of water.

[0053] The radial flange protrudes into the inner circumferential wall of the outer cylinder to the side of the notch opposite to the inner circumferential wall of the outer cylinder, so that the radial flange does not affect the size of the residual water hole for water return.

[0054] In an embodiment of the present invention, the inner cylinder 3 includes a cylinder body with an end opening 24 and a flange that seals the end opening 24 of the cylinder body. The outer periphery of the flange extends radially toward the inner peripheral wall of the outer cylinder to form a radial rolled edge that wraps around the second annular retaining rib. There is a second gap between the outer peripheral side of the radial rolled edge and the inner peripheral wall of the outer cylinder.

[0055] In an embodiment of the present invention, the outer periphery of the flange is provided with a radial rolled edge, which wraps around the second annular retaining rib, increasing the assembly strength between the flange and the inner cylinder 3, while improving the structural strength of the second annular retaining rib and increasing the strength of the second annular retaining rib in blocking water flow.

[0056] like Figure 1-3 As shown, specifically, the inner cylinder 3 includes a cylinder body and a front flange 32 and a rear flange 33 that are respectively provided at both ends of the cylinder body to block the front opening 24 and the rear opening 24. The front flange 32 is provided with a front radial flange 34 and the rear flange 33 is provided with a rear radial flange 35. The front radial flange 34 is provided at the front end of the front first annular baffle 41 and the rear radial flange 35 is provided at the rear end of the rear first annular baffle 42.

[0057] The inner cylinder 3 has openings 24 at both ends, namely the front opening 24 and the rear opening 24. The front flange 32 blocks the front opening 24, and the rear flange 33 blocks the rear opening 24. The front flange 32 and the rear flange 33 are disc-shaped, and the cylinder is cylindrical. The front flange 32 and the rear flange 33 are coaxially arranged with the cylinder.

[0058] like Figure 2 As shown, for the front flange 32 and the front second annular rib, the outer periphery of the front flange 32 first extends forward axially to form the front first flange, which abuts against the inner wall of the inner cylinder 3. The front end of the front first flange then extends radially towards the outer cylinder 2 to form the front second flange. The end of the front second flange near the inner wall of the outer cylinder then extends axially backward to form the front third flange. The front third flange then extends radially towards the inner cylinder 3 to form the front fourth flange. The end of the front fourth flange near the inner cylinder 3 then extends axially backward to form the front fifth flange, which abuts against the outer wall of the inner cylinder. The front second flange, the front third flange, and the front fourth flange form the front radial flange 34. The front second flange, the front third flange, and the front fourth flange abut against the side of the corresponding front second annular baffle 43, thus wrapping around the front second annular baffle 43. The front third flange is arc-shaped and protrudes towards the outer cylinder 2 to reduce the turbulence when water passes through this position and avoid water splashing.

[0059] like Figure 3As shown, for the rear flange 33 and the second rear annular rib, the outer periphery of the rear flange 33 first extends axially backward to form the first rear flange, which abuts against the inner wall of the inner cylinder 3. The rear end of the first rear flange then extends radially towards the outer cylinder 2 to form the second rear flange. The end of the second rear flange near the inner wall of the outer cylinder then extends axially forward to form the third rear flange. The third rear flange then extends radially towards the inner cylinder to form the fourth rear flange. The end of the fourth rear flange near the inner cylinder 3 then extends axially forward to form the fifth rear flange, which abuts against the outer wall of the inner cylinder. The second, third, and fourth rear flanges form the rear radial flange 35. The second, third, and fourth rear flanges abut against the sides of the corresponding second rear annular baffle 44, thus wrapping around the second rear annular baffle 44. The third rear flange is arc-shaped and protrudes towards the outer cylinder 2, reducing the turbulence when water passes through this position and preventing water splashing.

[0060] like Figure 4 As shown, the present invention provides a drum washing machine, including an outer shell 1 with a clothes loading port 13 and an inner drum 3 disposed inside the outer shell 1. The outer shell 1 is provided with a door 14 for opening and closing the clothes loading port 13. The door 14 is provided with a first air duct 121. The outer shell 1 is provided with a second air duct 122. The outer shell 1 is provided with an outer shell ventilation port 151. The first air duct 121, the outer shell ventilation port 151 and the second air duct 122 can form a drying air duct 12.

[0061] In an embodiment of the present invention, by forming a drying air duct 12 by the first air duct 121 on the door body 14, the outer shell ventilation port 151 on the outer shell 1 and the second air duct 122 on the outer shell, the second air duct 122 forming the drying air duct 12 can be located outside the outer shell 1, reducing the space occupied by the air duct between the front side of the inner cylinder 3 and the outer shell 1, thereby increasing the capacity of the inner cylinder 3.

[0062] The inner cylinder 3 can be a perforated inner cylinder or a non-perforated inner cylinder. When the inner cylinder 3 is a perforated inner cylinder, the outer cylinder 2 is a water container. When the inner cylinder 3 is a non-perforated inner cylinder, the inner cylinder 3 is a water container. The outer shell 1 has a front panel 15, and the outer shell ventilation port 151 and the clothing loading port 13 are provided on the front panel 15 of the outer shell.

[0063] The inner cylinder 3 has an inner cylinder air inlet 36 and an inner cylinder air outlet 37. The drying air duct 12 is connected to the inner air inlet and the inner cylinder air outlet 37 respectively, so as to realize the circulation of air inside the inner cylinder and reuse the heat of the air.

[0064] like Figure 4As shown, the door 14 includes a first part and / or a second part. The radial dimension of the first part is larger than the radial dimension of the clothing inlet 13, and the radial dimension of the second part is smaller than the radial dimension of the clothing inlet 13. The first part is fitted to the front panel 15 after the door is closed, and the second part is embedded into the outer shell 1 through the clothing inlet 13 after the door is closed. Specifically, the second air duct 122 is located on the first part, rather than inside the outer shell 1, which can reduce the number of pipes inside the outer shell 1 and reduce the space occupied by the drying air duct 12 between the front side of the inner drum 3 and the outer shell 1.

[0065] When the door 14 closes the clothing loading port 13, the first air duct 121, the second air duct 122, and the outer shell vent 151 can form a drying air duct 12, which supplies hot air to the inner drum 3 to dry the clothes inside the inner drum 3. When the door 14 opens the clothing loading port 13, the first air duct 121, the second air duct 122, and the outer shell vent 151 cannot form a drying air duct 12, that is, the first air duct 121 is not connected to the outer shell vent 151 and the second air duct 122.

[0066] like Figure 4 As shown, in an embodiment of the present invention, the interior of the door 14 is hollow to form a vertically extending first air duct 121. The air inlet of the first air duct 121 is located at the top of the inner side of the door 14. The outer shell ventilation port 151 corresponds to the position of the air inlet of the first air duct 121 and can overlap and communicate with the air inlet of the first air duct 121.

[0067] In the embodiments of the present invention, the first air duct 121 extends vertically inside the door body 14, and the air inlet of the first air duct 121 is located on the inner side of the door body 14, so that the air inlet of the first air duct 121 can correspond to the outer shell ventilation opening 151 when the clothing loading opening 13 of the door body 14 is closed, thereby enabling communication with the outer shell ventilation opening 151; the extension dimension of the outer tube 2 ventilation opening is the same as the extension dimension of the air inlet of the first air duct 121. When the clothing loading opening 13 of the door body 14 is closed, the outer tube 2 ventilation opening overlaps with the air inlet of the first air duct 121, reducing the leakage of hot air from the gap between the outer tube 2 ventilation opening and the air inlet of the first air duct 121; since hot air generally flows upward, the air inlet of the first air duct 121 is located at the top of the door body 14, which facilitates the entry of hot air into the first air duct 121 from the air inlet of the first air duct 121;

[0068] like Figure 5 As shown, further, a positioning groove 19 is provided around the outer periphery of the air inlet of the first air duct 121, and a sealing ring 17 is provided inside the positioning groove 19; the sealing ring 17 is provided around the outer periphery of the air inlet of the first air duct 121, and the sealing ring 17 abuts against the front panel 15 of the outer shell when the door 14 closes the clothing loading port 13, thereby reducing the leakage of hot air from the air inlet of the first air duct 121 and the ventilation port 151 of the outer shell;

[0069] To increase the stability of the sealing ring 17, prevent the sealing ring 17 from shifting, and improve the sealing between the air inlet of the first air duct 121 and the vent 151 of the outer casing, a positioning groove 19 is set inside the door body 14. The sealing ring 17 is embedded in the positioning groove 19, and at least part of the sealing ring 17 is exposed outside the positioning groove 19. When the door body 14 closes the clothing loading port 13, the groove of the positioning groove 19 faces the front panel 15 of the outer casing. The sealing ring 17 exposed in the positioning groove 19 abuts against the front panel 15 of the outer casing. The positioning groove 19 is specifically set on the outer periphery of the air inlet of the first air duct 121.

[0070] like Figure 4 As shown, in an embodiment of the present invention, the second air duct 122 includes a first sub-air duct 1221 and a second sub-air duct 1222 extending horizontally at the top of the inner cylinder 3. The air outlet of the first sub-air duct 1221 extends to the front side of the inner cylinder 3 and is set higher than the outer shell ventilation opening 151. The second sub-air duct 1222 is inclinedly arranged in the space between the front side of the inner cylinder 3 and the outer shell 1, and is connected to the air outlet of the first sub-air duct 1221 and the outer shell ventilation opening 151 respectively.

[0071] In an embodiment of the present invention, the second air duct 122 includes a first sub-air duct 1221 and a second sub-air duct 1222. The first sub-air duct 1221 extends horizontally at the top of the inner cylinder 3, extending from the rear side of the inner cylinder 3 to the front side of the inner cylinder 3. The first sub-air duct 1221 makes full use of the space between the top of the inner cylinder 3 and the outer shell 1. The air outlet of the first sub-air duct 1221 is located at the rear side of the inner cylinder 3, and the air inlet of the first sub-air duct 1221 is located at the front side of the inner cylinder 3. The first sub-air duct 1221 is provided with a heating device for heating gas and a fan that provides power for the flow of hot air.

[0072] There is a height difference between the air outlet of the first sub-air duct 1221 and the air inlet of the outer shell vent 151 and the air inlet of the first air duct 121. The air outlet of the first sub-air duct 1221 is set higher than the air inlet of the outer shell vent 151 and the air inlet of the first air duct 121. Therefore, in order to achieve the connection between the air outlet of the first sub-air duct 1221 and the outer shell vent 151, and to reduce the space occupied by the second sub-air duct 1222 between the front side of the inner cylinder 3 and the outer shell 1, the second sub-air duct 1222 is set obliquely in the space between the front side of the inner cylinder 3 and the outer shell 1. The air outlet of the second sub-air duct 1222 is connected to the outer shell vent 151, and the air inlet of the second sub-air duct 1222 is connected to the air outlet of the first sub-air duct 1221. If the second sub-air duct 1222 is not set obliquely, but is arranged vertically first and then horizontally, the second sub-air duct 1222 will occupy more space.

[0073] like Figure 4As shown, in an embodiment of the present invention, an outer cylinder 2 is provided outside the inner cylinder 3. The outer cylinder 2 includes a cylinder body 25 and an annular protrusion 26 coaxially arranged with the cylinder body 25. The inner periphery of the annular protrusion 26 forms the outer cylinder opening 241. The radial dimension of the annular protrusion 26 is smaller than the radial dimension of the cylinder body 25. A first sub-air duct 1221 extends at the top of the outer cylinder 2. The air outlet of the first sub-air duct 1221 extends to the area between the front end of the cylinder body 25 and the front end of the annular protrusion 26. The outer shell ventilation port 151 is provided between the top of the cylinder body 25 and the top of the outer cylinder opening 241.

[0074] In an embodiment of the present invention, the drum washing machine further includes an outer drum 2, which is disposed inside the outer shell 1, and an inner drum is disposed inside the inner drum 3. The outer drum 2 and the inner drum 3 are coaxially arranged, and the outer drum opening 241, the inner drum opening 38 and the clothes loading port 13 are coaxially arranged.

[0075] The outer cylinder 2 includes a cylinder body 25 and an annular protrusion 26. The annular protrusion is located on the front end face of the cylinder body 25 and is coaxially arranged with the cylinder body 25. The inner periphery of the annular protrusion forms the outer cylinder opening 241. The radial dimension of the cylinder body 25 is larger than the radial dimension of the annular protrusion 26, so that there is a certain transition space between the cylinder body 25 and the annular protrusion 26. When the second sub-air duct 1222 is installed, it can occupy this transition space and make full use of the space between the front side of the outer cylinder 2 and the outer shell 1, thereby increasing the volume of the outer cylinder 2 and thus increasing the capacity of the inner cylinder 3. The air outlet of the first sub-air duct 1221 extends to the front end of the cylinder body 25 and the front end of the annular protrusion 26. The outer shell ventilation opening 151 is located between the top of the cylinder body 25 and the top of the outer cylinder opening 241. The air outlet of the first sub-air duct 1221 and the outer shell ventilation opening 151 are arranged in this way so that the second sub-air duct 1222 can utilize the transition space when it is installed.

[0076] The bottom of the inner cylinder is provided with several axially extending inner cylinder air outlets 37. Each inner cylinder air outlet 37 is connected to the air inlet of the second air duct 122. Specifically, the bottom of the inner cylinder is provided with an inner cylinder air outlet 37. The gas in the inner cylinder enters the gap between the bottom of the inner cylinder and the bottom of the outer cylinder through the inner cylinder air outlet 37. The bottom of the outer cylinder is provided with a ventilation port 242. The gas entering the gap enters the second sub-air duct 1222 through the ventilation port and the air inlet of the second sub-air duct 1222. The ventilation port at the bottom of the outer cylinder is connected to the air inlet of the second sub-air duct 1222 through a pipe.

[0077] like Figure 4 As shown, in an embodiment of the present invention, an annular window pad 16 is also included. The radial dimension of the clothing inlet 13 is larger than the radial dimension of the outer tube opening 241. The inner end of the annular window pad 16 is connected to the outer periphery of the outer tube opening 241, and the outer end of the annular window pad 16 is connected to the outer periphery of the clothing inlet 13. The outer shell ventilation opening is higher than the connection between the annular window pad 16 and the clothing inlet 13.

[0078] In an embodiment of the present invention, an annular window pad 16 is provided between the clothing inlet 13 and the outer cylinder opening 241. The annular window pad 16 can prevent foreign objects from entering the space between the outer cylinder 2 and the outer shell 1. Since the outer shell ventilation opening is higher than the connection between the annular window pad 16 and the clothing inlet 13, and the radial dimension of the clothing inlet 13 is larger than the radial dimension of the outer cylinder opening 241, the radial dimension of the annular window pad 16 gradually increases from back to front. Therefore, it can be concluded that the second sub-air duct 1222 is located on the outer periphery of the annular window pad 16, so that the annular window pad 16 can prevent the heat in the second sub-air duct 1222 from being transferred to other places that are far away from the second sub-air duct 1222.

[0079] In an embodiment of the present invention, the air outlet 1211 of the first air duct is located on the inner side of the door 14 and serves as the air outlet of the drying air duct 12. The air outlet 1211 of the first air duct corresponds to the position of the inner tube opening 38 and can be connected to the inner tube opening 38 through the clothing loading port 13.

[0080] In an embodiment of the present invention, the air outlet 1211 of the first air duct serves as the air outlet of the drying air duct 12. The air outlet 1211 of the first air duct is located on the inner side of the door 14, so that the air outlet 1211 of the first air duct corresponds to the position of the inner tube opening 38 when the door 14 closes the clothes loading port 13. The first air duct 121 supplies air to the inner tube through the annular channel formed by the air outlet 1211 of the first air duct, the clothes loading port 13, the inner circumference of the annular window pad 16, and the inner tube opening 38. The first air duct 121 supplies air to the inner tube directly through the inner tube opening 38.

[0081] like Figure 4 As shown, specifically, the inner cylinder is provided with an inner cylinder door 18 for opening and closing the inner cylinder opening 38, and the inner cylinder door 18 is provided with a plurality of axially extending inner cylinder air inlets 36. The plurality of inner cylinder air inlets 36 are arranged vertically to form an air inlet area 181. The air outlet 1211 of the first air duct corresponds to the position of the air inlet area 181. The first air duct 121 supplies air to the inner cylinder through the inner cylinder air inlets 36.

[0082] The air inlet area 181 is located in the middle of the inner cylinder door 18. The air outlet 1211 of the first air duct corresponds to the air inlet area 181. The air inlet of the first air duct 121 coincides with the air inlet area 181. The projection of the air inlet of the first air duct 121 on the inner cylinder door 18 coincides with the air inlet area 181, so that the first air duct 121 can accurately introduce air into the air inlet area 181.

[0083] The inner cylinder air inlet 36 and / or the inner cylinder air outlet 37 have multiple steps continuously distributed along the axial direction. The inner cylinder air inlet 36 has multiple steps continuously distributed along the axial direction, or the inner cylinder air outlet 37 has multiple steps continuously distributed along the axial direction, or the inner cylinder air inlet 36 and the inner cylinder air outlet 37 have multiple steps continuously distributed along the axial direction.

[0084] The inner cylinder air outlet 37 and the inner cylinder air inlet 36 are stepped, meaning that they each have multiple steps continuously distributed along the axial direction, which improves the uniformity of air intake and exhaust in the inner cylinder.

[0085] like Figure 4 As shown, specifically, the air inlet area 181 includes a first area 1811 and a second area 1812 arranged vertically. The air inlet of the first area 1811 has multiple steps that gradually decrease from front to back, and the air inlet of the second area 1812 has multiple steps that gradually increase from front to back. The inner cylinder air inlet 36 and the inner cylinder air outlet 37 both include a first step 361, a second step 362, and an inclined wall 363 connecting the first step 361 and the second step 362.

[0086] The inner cylinder air inlet 36 of the first region 1811 includes a first step 361 and a second step 362. The first step 361 is set higher than the second step 362, so that the lower part of the inclined wall 363 is close to the center of the inner cylinder door 18. The inner cylinder air inlet 36 of the second region 1812 includes a first step 361 and a second step 362. The first step 361 is set lower than the second step 362, so that the upper part of the inclined wall 363 is close to the center of the inner cylinder door 18. The inclined wall 363 has a guiding effect on the air intake, thereby realizing that the air intake is close to the center of the inner cylinder door 18 and preventing hot air from spreading outward.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A drum washing machine, comprising an outer drum and a non-perforated inner drum rotatably disposed within the outer drum, characterized in that, The outer cylinder includes a drainage area with a drain outlet and a non-drainage area with an opening. A barrier structure is provided between the outer cylinder and the inner cylinder to prevent water in the drainage area from flowing into the non-drainage area. The blocking structure includes a first annular baffle formed by a radial protrusion of one ring on the inner circumferential wall of the outer cylinder and a second annular baffle formed by a radial protrusion of one ring on the outer circumferential wall of the inner cylinder. There is a first gap between the inner circumferential side of the first annular baffle and the outer circumferential wall of the inner cylinder, and a second gap between the outer circumferential side of the second annular baffle and the inner circumferential wall of the outer cylinder. The first annular baffle and the second annular baffle are arranged at intervals along the axial direction, and the first annular baffle and the second annular baffle have overlapping portions. The outer cylinder includes a drainage area formed by the outer cylinder wall and two non-drainage areas formed by the two end walls of the outer cylinder. The two non-drainage areas are respectively provided with an outer cylinder opening and a ventilation opening. The outer cylinder opening and the ventilation opening serve as openings. The blocking structure includes a front first annular baffle and a front second annular baffle near the outer cylinder opening and a rear first annular baffle and a rear second annular baffle near the ventilation opening. The vent connects to the air inlet of the drying duct.

2. The drum washing machine according to claim 1, characterized in that, The first and second annular retaining ribs are installed sequentially along the direction from the drainage zone to the non-drainage zone.

3. The drum washing machine according to claim 2, characterized in that, The inner cylinder includes a cylinder with an end opening and a flange that seals the end opening of the cylinder. The outer periphery of the flange extends radially toward the inner peripheral wall of the outer cylinder to form a radial rolled edge that wraps around the second annular retaining rib. There is a second gap between the outer periphery of the radial rolled edge and the inner peripheral wall of the outer cylinder.

4. The drum washing machine according to claim 3, characterized in that, The outer periphery of the first annular retaining rib is provided with a notch, which together with the inner wall of the outer cylinder forms an axially extending residual water hole. The residual water hole connects the drainage area and the non-drainage area. The radially rolled edge protrudes towards the inner wall of the outer cylinder to the side that does not exceed the notch opposite to the inner wall of the outer cylinder.

5. The drum washing machine according to claim 1, characterized in that, The outer cylinder wall is stepped along the axial direction. The outer cylinder wall includes a front cylinder wall and a rear cylinder wall. The rear cylinder wall protrudes inward relative to the front cylinder wall. The first annular baffle is located at the front end of the front cylinder wall, and the first annular baffle is located on the rear cylinder wall and close to the rear end of the front cylinder wall. The size of the first annular baffle gradually decreases from the outside to the inside.

6. The drum washing machine according to claim 5, characterized in that, The cylinder is provided with a front flange that seals the front opening and a rear flange that seals the rear opening at both ends. The front flange is provided with a front radial flange and the rear flange is provided with a rear radial flange. The front radial flange is located at the front end of the first annular baffle and the rear radial flange is located at the rear end of the first annular baffle.

7. The drum washing machine according to any one of claims 1-6, characterized in that, The inner cylinder is a water-holding cylinder, and a centrifugal valve is installed on the inner cylinder wall to drain the water in the inner cylinder into the drainage area.

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