JP2018538034A - Washing tub and washing machine - Google Patents

Abstract

In the washing machine inner tub and the washing machine, the inner tub includes a tub bottom (300) and a tub body (200) connected thereto. The tank bottom (300) includes a tank bottom main body (310) and a tank bottom protective cover (320), and the tank bottom protective cover (320) is attached to seal and cover the bottom of the tank bottom main body (310). The entire outer surface of the bottom (300) is made smooth. The outer surface of the tank bottom protective cover (320) in the washing machine inner tank is a smooth and flat surface, which is advantageous due to the cleaning effect of the cleaning granules on the tank bottom (300) of the inner tank. The tank bottom protective cover (320) is hermetically connected to the bottom of the tank bottom main body (310) to make the reinforcing rib structure a sealed space. Washing water was prevented from entering the reinforcing rib structure, and the problem of bacteria growing on the reinforcing rib structure portion at the bottom of the tank or accumulation of dirt was fundamentally prevented.
[Selection] Figure 4

Description

  The present invention relates to a technical field of a washing apparatus, and specifically relates to a washing machine inner tub and a washing machine.

  Inner and outer tubs of household electric fully automatic washing machines are fitted, and the operation process is to put clothes into the inner tub, add water into the tub and add detergent, automatically washing, rinsing and dehydration programs Execute. In the course of use, the washing tub must always come in contact with washing water, clothing, lint, etc. Furthermore, it is inevitable that the washing machine is generally placed in a moist and poorly permeable bathroom, and dirt accumulates between the inner and outer tubs in the course of prolonged use. In the current washing machine, the gap between the inner and outer tubs is relatively small, and the outer tub cover is designed at the upper part of the outer tub, so that it is difficult for the user to clean the inner tub. Therefore, when used for a long time, mold, bacteria, etc. are generated from dirt in the inner tank, which not only affects the washing effect of clothes, but also causes secondary contamination, which affects the health of the user.

  One existing method is to introduce rubber ball granules between the inner and outer tanks. The Chinese patent of patent number 20080183308.4 discloses a “double tub washing machine with inter-bath cleaning”. A plurality of circular silicone balls are placed between the inner and outer tubs, and water is made to flow by using the rotation of the inner tub of the washing machine. The purpose of cleaning the inner and outer tank walls is achieved. The density of the rubber ball granules corresponds to water or is slightly lower than the density of water. When the user performs normal washing using the washing machine, the granules of the rubber balls float in the water and collide and rub against the outer wall of the inner tank and the inner wall of the outer tank during the washing process to effectively remove the dirt on the upper surface. Can do.

  In addition, in order to increase the strength of the inner tank of the pulsator washing machine, a plurality of reinforcing ribs are generally designed on the bottom of the inner tank. These reinforcing ribs intersect each other and form many indentations in the inner tank bottom. Due to the presence of the indentation structure, dirt accumulates very easily here, and there are relatively many reinforcing ribs and the indentation structure is many and small. When the tank wall is cleaned with the rubber ball granules, the rubber ball granules cannot fundamentally enter the indentation structure and the inner tank bottom cannot be cleaned, which affects the cleaning effect.

  The Chinese utility model whose existing patent number is 20121205554753.9 and the name is a washing machine inner tub and a washing machine provides a washing machine inner tub, and includes a balance ring, a tank body, and a tub bottom. A protective cover is further attached to the bottom of the tank, and the protective cover includes an annular vertical side wall and a flat bottom surface with drain holes. The side wall of the protective cover is located outside the side wall of the tank bottom, and the protective cover and the inner tank bottom are connected by screws or fastened. The utility model also relates to a washing machine that uses the washing machine inner tank structure and has an automatic washing function. The utility model attaches a protective cover to the bottom of the inner tub of the washing machine, and effectively prevents the rubber balls from entering the recess in the inner tub bottom. The rubber ball enhances the effect of washing the inner and outer tub walls, and at the same time, reduces the noise caused by the rubber ball colliding with the inner tub during dehydration, thereby improving the quality of the washing machine product.

  The above utility model has a protective cover attached to the bottom of the tub inside the washing machine to prevent the rubber balls from entering the dents and to ensure the cleaning effect of the tub wall. To prevent. However, the protective cover is provided with a drainage hole, and the washing water still enters the recess, and dirt is generated in the recess. Once soiled, it is difficult to remove or cannot be removed fundamentally.

  In view of this, the present invention is particularly shown.

Chinese Patent No. 200008183308.4 Specification China Utility Model No. 2011205554753.9 Specification

In order to solve the above technical problem, an object of the first invention in the present invention is to provide a washing machine inner tub in which automatic washing of the tub bottom is easier. Specifically, the following technical plan was adopted.
The tank in the washing machine includes a tank bottom and a tank body connected to the tank bottom. The tank bottom includes a tank bottom main body and a tank bottom protective cover, and the tank bottom protective cover is attached so as to seal and cover the bottom of the tank bottom main body, and makes the entire outer surface of the tank bottom smooth.

  Further, a reinforcing rib structure is provided at the bottom of the tank bottom main body, and the outer surface of the tank bottom protective cover is a smooth surface. The tank bottom protective cover is hermetically connected to the bottom of the tank bottom main body to form an integral structure, and the tank bottom protective cover completely covers the reinforcing rib structure, thereby making the reinforcing rib structure a sealed space.

  Furthermore, a first connection surface is provided outside the bottom surface of the tank bottom body, a second connection surface is provided inside the bottom surface of the tank bottom protective cover, and the first connection surface is hermetically connected to the second connection surface. A third connection surface is provided on the side wall of the tank bottom main body, a side wall end of the tank bottom protective cover is a fourth connection surface, and the third connection surface is hermetically connected to the fourth connection surface.

  Furthermore, a first opening is provided on the bottom surface of the tank bottom main body, and the first opening extends outward from the inner tank to form a first connection surface. A second opening is provided on the bottom surface of the tank bottom protective cover corresponding to the first opening, and the second opening extends to the inside of the inner tank to form a second connection surface.

  Further, a reinforcing rib structure is provided on the bottom and bottom of the side wall of the tank bottom main body, a third connection surface is provided at a connection portion with the reinforcing rib structure on the side wall of the tank bottom main body, and a side wall end of the tank bottom protective cover. Is a fourth connection surface.

  Further, a flange structure is attached to the tank bottom, and the flange structure is installed outside the bottom surface of the tank bottom protective cover.

  Furthermore, a boss is provided on the bottom surface of the tank bottom body, and a screw hole is provided on the bottom surface of the tank bottom protective cover so as to correspond to the boss. The flange structure is connected and fixed to the inner tank bottom using screws and bosses.

  Furthermore, a protrusion structure is provided at a position around the screw hole inside the bottom surface of the tank bottom protective cover, and an end of the protrusion structure is a sixth connection surface. An annular reinforcing rib is provided around the boss on the bottom surface of the tank bottom main body, and the end of the annular reinforcing rib is a fifth connection surface. The fifth connection surface is hermetically connected to the sixth connection surface.

  Furthermore, the tank bottom protective cover is integrally connected to the tank bottom main body by a welding method. The first connection surface, the second connection surface, the third connection surface, the fourth connection surface, the fifth connection surface, and the sixth connection surface are welding surfaces, respectively.

  Furthermore, the said inner tank is rotatably installed in an outer tank, and the washing | cleaning granule which wash | cleans an inner tank outer wall and an outer tank inner wall is provided between an inner tank and an outer tank. The tank bottom protective cover is a hollow annular lid, and the flange structure correspondingly closes the hollow position of the tank bottom protective cover. The flange structure is provided with a water permeable passage corresponding to the hollow position portion, and the water permeable passage allows the washing water to flow out and prevent the cleaning granules from entering.

  The washing machine inner tub of the present invention is specially applied to a washing machine having cleaning granules between an inner tub and an outer tub. The tank bottom includes two parts, a tank bottom main body and a tank bottom protective cover, and the tank bottom protective cover covers the reinforcing rib structure of the tank bottom main body. The outer surface of the tank bottom protective cover is a smooth and flat surface, and is thus more advantageous due to the cleaning effect of the cleaning granules on the tank bottom of the inner tank. In addition, the tank bottom protective cover is hermetically connected to the bottom of the tank bottom main body to make the reinforcing rib structure a sealed space. Washing water was prevented from entering the reinforcing rib structure, and the problem of bacteria growing on the reinforcing rib structure portion at the bottom of the tank or accumulation of dirt was fundamentally prevented.

  Accordingly, the inner tub of the washing machine of the present invention is advantageous by cleaning the cleaning granule on the tank bottom of the inner tub, preventing bacteria from growing on the reinforcing rib structure portion of the tank bottom or accumulating dirt, The automatic cleaning effect is good and has a vast market prospect.

  The object of the second invention in the present invention is to provide a washing machine having the washing tub in any one of the above.

FIG. 1 is a schematic structural diagram of a washing machine inner tub according to the present invention. FIG. 2 is a cross-sectional view of FIG. 1 in the present invention. FIG. 3 is a partially enlarged view of FIG. 2 in the present invention. FIG. 4 is an exploded view of the tank bottom of the washing machine inner tank in the present invention. FIG. 5 is a schematic view of a three-dimensional structure of the tank bottom protective cover according to the present invention.

Hereinafter, the inner tub and the washing machine of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the tub in the washing machine includes a tub bottom 300 and a tub body 200 connected thereto. The tank bottom part 300 includes a tank bottom part body 310 and a tank bottom part protection cover 320. The tank bottom part protection cover 320 is attached so as to seal and cover the bottom part of the tank bottom part body 310, and the entire outer surface of the tank bottom part is smooth. Make sure.

  The tank body 200 and the tank bottom 300 of the present invention surround the tank-shaped structure into which laundry clothes are placed. The tank body 200 is generally made of a metal material, and the tank bottom 300 is generally a plastic structure. Therefore, in order to ensure the strength of the tank bottom 300, a series of reinforcing rib structures are provided on the bottom of the tank bottom main body 310.

  The reinforcing rib structure includes a radial reinforcing rib 312 and an annular rib 313, and the radial reinforcing rib 312 and the annular rib 313 intersect to form a plurality of recessed structures.

  The tank bottom 300 of the present invention includes a tank bottom main body 310 and a tank bottom protective cover 320, and the outer surface of the tank bottom protective cover 320 is a smooth and flat surface. The tank bottom protective cover 320 is hermetically connected to the bottom of the tank bottom main body 310, and the tank bottom protective cover 320 completely covers the reinforcing rib structure to make the reinforcing rib structure a sealed space.

  The washing machine inner tub of the present invention is specially applied to a washing machine having cleaning granules between an inner tub and an outer tub. The tank bottom 300 includes two parts, a tank bottom main body 310 and a tank bottom protective cover 320, and the tank bottom protective cover 320 covers the reinforcing rib structure of the tank bottom main body 310. The outer surface of the tank bottom protective cover 320 is a smooth and flat surface, and is thus more advantageous for the cleaning effect of the cleaning granules on the tank bottom 300 of the inner tank. The tank bottom protective cover 320 is hermetically connected to the bottom of the tank bottom main body 310 to make the reinforcing rib structure a sealed space. Washing water was prevented from entering the reinforcing rib structure, and the problem of bacteria growing on the reinforcing rib structure portion at the bottom of the tank or accumulation of dirt was fundamentally prevented.

  The tank bottom main body 310 of the present invention has an annular bowl-shaped structure with a hollow bottom, and includes a side wall 311 of the tank bottom main body having a closed annular shape and a bottom surface of the tank main body connected to the side wall 311. The outer contour of the tank bottom protective cover 320 corresponds to the outer contour of the tank bottom main body 310, and the tank bottom protective cover 320 is attached so as to cover the tank bottom main body 310 and covers the reinforcing rib structure.

  Since the reinforcing rib structure is provided on the side wall 311 of the tank bottom main body and the bottom surface of the tank main body in the existing tank bottom main body 310, the tank bottom protective cover 320 and the bottom of the tank bottom main body 310 are hermetically sealed and reinforced. Make the rib structure a sealed space.

  As shown in FIGS. 4 and 5, the first connection surface 314 is provided outside the bottom surface of the tank bottom body 310 of the present invention, the second connection surface 328 is provided inside the bottom surface of the tank bottom protection cover 320, and the first The connection surface 314 is hermetically connected to the second connection surface 328. A third connection surface 315 is provided on the side wall of the tank bottom main body 310, a side wall end of the tank bottom protection cover 320 is a fourth connection surface 321, and the third connection surface 315 is hermetically connected to the fourth connection surface 321. The As described above, the connection portions of the two edges in the tank bottom main body 310 and the tank bottom protective cover 320 of the present invention both realize a hermetic connection, and thereby the reinforcement located between the connection portions of the two edges. Make the rib structure a sealed space.

  As shown in FIG. 3, the sealed connection of the first connection surface 314 and the second connection surface 328 of the present invention forms a seal surface of a portion C in the drawing, and the third connection surface 315 and the fourth connection surface 321 are sealed. The connection forms a connection surface A in FIG. All of the reinforcing rib structures of the tank bottom main body 310 are located in a sealed space between A and C in the drawing and are completely isolated from the outside. Washing water was prevented from coming into contact with the reinforcing rib structure, and the problem of bacteria growing on the reinforcing rib structure at the bottom of the tank or accumulation of dirt was fundamentally prevented.

  Specifically, as shown in FIGS. 4 and 5, a first opening is provided on the bottom surface of the tank bottom body 310 of the present invention, and the first opening extends to the outside of the inner tank to form a first connection surface 314. The A second opening corresponding to the first opening is provided on the bottom surface of the tank bottom protective cover 320, and the second opening extends to the inside of the inner tank to form a second connection surface 328.

  The first opening of the tank bottom body 310 is for attaching a pulsator of the washing machine, and therefore the first opening is the innermost edge of the tank bottom body 310. The reason why the second opening is provided in the tank bottom protective cover 320 is that it corresponds to the tank bottom main body 310 and does not affect the mounting of the pulsator, and the second opening is the innermost edge of the tank bottom protective cover 320. is there. Therefore, according to the present invention, the first connection surface 314 is provided in the first opening, and the second connection surface 328 is provided in the second opening, whereby the innermost edge of the tank bottom body 310 is the most of the tank bottom protection cover 320. It is hermetically connected to the inner edge.

  A reinforcing rib structure is provided on the bottom and bottom of the side wall of the tank bottom main body 310 of the present invention, a third connection surface 315 is provided at a connection portion of the side wall of the tank bottom main body 310 with the reinforcing rib structure, and the tank bottom protective cover 320 is provided. The side wall end portion is a fourth connection surface 321. The third connection surface 315 and the fourth connection surface 321 of the present invention are provided at the outermost edge of the connection portion of the tank bottom main body 310 and the tank bottom protective cover 320, and thereby the outermost edge of the tank bottom main body 310. The part is hermetically connected to the outermost edge of the tank bottom protective cover 320.

  The washing machine inner tank bottom 300 is further connected to a transmission shaft, and the transmission shaft realizes rotation of the inner tank under the drive of a motor. Since the inner tank bottom 300 is generally manufactured by injection molding, in order to ensure the connection strength between the inner tank bottom 300 and the transmission shaft, a flange structure 330 is generally attached to the inner tank bottom 300, and the flange structure 330 is Generally manufactured with a metal material. Specifically, a flange structure 330 is attached to the tank bottom 300 of the present invention, and the flange structure 330 is installed outside the bottom of the tank bottom protective cover 320. The present invention attaches the flange structure 330 to the outside of the bottom surface of the tank bottom protective cover 320 so that the attachment of the flange structure 330 does not affect the sealing surface between the tank bottom main body 310 and the tank bottom protective cover 320 and is sealed. To ensure the effect of.

  Specifically, the tank bottom main body 310 of the present invention is the main structure of the tank bottom 300, and the tank bottom protective cover 320 mainly covers the reinforcing rib structure of the tank bottom main body 310. Therefore, the thickness of the tank bottom body 310 of the present invention is thicker than the tank bottom protective cover 320 in order to guarantee the overall strength. In order to ensure stable attachment of the flange structure 330, the present invention is provided with a boss 317 on the bottom surface of the tank bottom body 310 and a screw hole 325 corresponding to the boss 317 on the bottom surface of the tank bottom protective cover 320. The flange structure 330 is connected and fixed to the inner tank bottom 300 using screws and bosses 317.

  From FIG. 4, it can be seen that the boss 317 provided on the bottom surface of the tank bottom body 310 is located between the reinforcing rib structures. Accordingly, the attachment of the flange structure 330 causes washing water to enter the reinforcing rib structure from the screw hole 325 portion. There is a possibility of entering. In order to further prevent the washing water from entering the reinforcing rib structure from the screw hole 325, the present invention is provided with a protrusion structure at a position around the screw hole 325 inside the bottom surface of the tank bottom protective cover 320. The part is a sixth connection surface 327. An annular reinforcing rib is provided in one circumference around the boss 317 on the bottom surface of the tank bottom main body 310, the end of the annular reinforcing rib is a fifth connection surface 316, and the sixth connection surface 327 is a fifth connection. It is hermetically connected to surface 316. Thus, as shown in FIG. 3, in the present invention, the sealing surface B is formed around the boss 317 in one round, and the reinforcing rib structure between the sealing surface B and the sealing surface A is still a completely sealed space. That is, most of the reinforcing rib structures were sealed.

  Further, according to the present invention, a protruding structure is provided at a position inside the screw hole 325 inside the bottom surface of the tank bottom protective cover 320, and an end of the protruding structure is an eighth connection surface. An annular reinforcing rib is provided around the boss 317 on the bottom surface of the tank bottom main body 310, and an end of the annular reinforcing rib is a seventh connecting surface, and the eighth connecting surface is a seventh connecting surface. Sealed connected. In this way, a sealing surface was also formed around the inside of the boss 317, and the reinforcing rib structure between the inside of the boss 317 and the sealing surface C was also sealed. Furthermore, the bottom surface of the tank bottom body 310 has only one reinforcing rib structure provided on the boss 317 and is not completely sealed, but all other parts are completely sealed, and the tank bottom reinforcing rib It achieves the technical effect of preventing bacteria from breeding on the structural part or accumulation of dirt.

  The inner tank of the present invention is rotatably installed in the outer tank, and cleaning granules for cleaning the inner tank outer wall and the outer tank inner wall are provided between the inner tank and the outer tank. The tank bottom protective cover 320 is a hollow annular lid, and the flange structure 330 correspondingly closes the hollow position of the tank bottom protective cover 320. The flange structure 330 is provided with a water permeable passage 332 corresponding to the hollow position portion, and the water permeable passage 332 allows the washing water to flow out and prevent the cleaning granules from entering. Specifically, the flange structure 330 of the present invention is a disk-like structure.

  The permeable passage 332 of the present invention guarantees the demand for drainage, and the permeable passage 332 needs to prevent the ingress of cleaning granules. As shown in FIG. 4, a plurality of water permeable passages 332 are provided and are elongated slit structures provided along the radial direction of the flange structure 330, and the width of the elongated slit structure is smaller than the diameter of the cleaning granules.

  In addition, the flange structure 330 is further provided with a plurality of protruding ribs 331 that reinforce its overall strength.

  In order to realize a sealed connection between the tank bottom main body 310 and the tank bottom protective cover 320, the tank bottom protective cover 320 of the present invention is integrally connected to the tank bottom main body 310 by a welding method. The first connection surface 314, the second connection surface 328, the third connection surface 315, the fourth connection surface 321, the fifth connection surface 316, and the sixth connection surface 327 are welding surfaces. By adopting the welding method, the connection surfaces can be integrally fused and connected, ensuring a tight connection and having a good sealing effect.

  In order to operate the welding process, in the present invention, a welding localization hole 326 used for welding work is provided on the bottom surface of the tank bottom protective cover 320.

  Other connection schemes known to those skilled in the art can be utilized if a sealed connection between the tank bottom body 310 and the tank bottom protective cover 320 can be achieved. For example, bonding or bolting adds a sealing strip to the sealing surface portion.

  The inner wall of the tank bottom protective cover 320 of the present invention is provided with reinforcing ribs 329 that reinforce the overall strength. A plurality of reinforcing ribs 329 are included, and are provided in one circumference along the radial direction of the tank bottom protective cover 320.

  The balance ring 100 is attached to the opening of the tub body 200 in the tub in the washing machine of the present invention.

  Another object of the present invention is to provide a washing machine having the washing tub. The inner tank is rotatably installed in the outer tank, and cleaning granules for cleaning the inner tank outer wall and the outer tank inner wall are provided between the inner tank and the outer tank. Therefore, when the washing machine of the present invention employs the above-described washing machine inner tub, the entire outer surface of the inner tub bottom has a smooth and flat structure, and the washing granule can wash the inner tub bottom better.

  The above descriptions are merely preferred embodiments of the present invention and do not limit the present invention in any way. Although the invention has been disclosed above by the preferred embodiments, it is not intended to limit the invention. A person skilled in the art can change or modify the equivalent equivalent embodiments using the technical contents shown above without departing from the technical plan of the present invention. Do not deviate from the contents. Based on the technical essence of the present invention, all simple modifications, equivalent changes and modifications made to the above embodiments are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Balance ring 200 Tank body 300 Tank bottom part 310 Tank bottom part main body 311 Side wall of a tank bottom part main body 312 Radial direction reinforcement rib 313 Annular rib 314 1st connection surface 315 3rd connection surface 316 5th connection surface 317 Boss 320 Tank bottom part protective cover 321 Fourth connection surface 322 Side wall of tank bottom protection cover 323 Bottom surface of tank bottom protection cover 324 Stereotaxic attachment 325 Screw hole 326 Welding localization hole 327 Sixth connection surface 328 Second connection surface 329 Reinforcement rib 330 Flange structure 331 Projection rib 332 Water permeability aisle

Claims (10)

  A tank in a washing machine including a tank bottom (300) and a tank body (200) connected thereto, wherein the tank bottom (300) includes a tank bottom main body (310) and a tank bottom protective cover (320). In the washing machine, the tank bottom protective cover (320) is attached to seal and cover the bottom of the tank bottom body (310), and the outer surface of the tank bottom (300) is a smooth surface. Tank.   A reinforcing rib structure is provided at the bottom of the tank bottom main body (310), and the outer surface of the tank bottom protective cover (320) is a smooth surface; the tank bottom protective cover (320) is a tank bottom main body (310). 2. Laundry as claimed in claim 1, characterized in that it is hermetically connected to the bottom of the base to form an integral structure, the tank bottom protective cover (320) completely covers the reinforcing rib structure and makes the reinforcing rib structure a sealed space. Inboard tank.   A first connection surface (314) is provided outside the bottom surface of the tank bottom body (310), a second connection surface (328) is provided inside the bottom surface of the tank bottom protection cover (320), and a first connection surface (314) is provided. ) Is hermetically connected to the second connection surface (328); a third connection surface (315) is provided on the side wall of the tank bottom body (310), and a side wall end of the tank bottom protection cover (320) is connected to the fourth connection surface. The washing machine inner tub according to claim 2, characterized in that it is a surface (321), and the third connection surface (315) is hermetically connected to the fourth connection surface (321).   A first opening is provided in the bottom surface of the tank bottom main body (310), the first opening extends to the outside of the inner tank to form a first connection surface (314), and a first connection surface (314) is formed on the bottom surface of the tank bottom protection cover (320). The washing machine inner tub according to claim 3, wherein a second opening is provided corresponding to one opening, and the second opening extends to the inside of the inner tub to form a second connection surface (328). .   A reinforcing rib structure is provided on the bottom and bottom of the side wall of the tank bottom main body (310), and a third connection surface (315) is provided on a connecting portion of the side wall of the tank bottom main body (310) with the reinforcing rib structure, The tub in the washing machine according to claim 3, wherein the side wall end of the bottom protective cover (320) is a fourth connection surface (321). A flange structure (330) is attached to the tank bottom (300), and the flange structure (330) is installed outside the bottom surface of the tank bottom protective cover (320);
Preferably, a boss (317) is provided on the bottom surface of the tank bottom body (310), and a screw hole (325) is provided on the bottom surface of the tank bottom protective cover (320) corresponding to the boss (317). The inside of the washing machine according to any one of claims 1 to 5, characterized in that the flange structure (330) is connected and fixed to the inner tank bottom (300) using screws and bosses (317). Tank.   A protrusion structure is provided at a position around the screw hole (325) inside the bottom surface of the tank bottom protective cover (320), and an end of the protrusion structure is a sixth connection surface (327), and the tank bottom body (310 ) On the bottom surface of the boss (317) around the bottom surface of the annular reinforcing rib, and the end of the annular reinforcing rib is the fifth connecting surface (316); the sixth connecting surface (327) is the The washing machine inner tub according to claim 6, characterized in that it is hermetically connected to the five connection surfaces (316).   The tank bottom protective cover (320) is integrally connected to the tank bottom main body (310) by a welding method, and the first connection surface (314), the second connection surface (328), the third connection surface (315), The washing machine inner tub according to claim 7, wherein the fourth connection surface (321), the fifth connection surface (316), and the sixth connection surface (327) are welding surfaces, respectively.   The inner tank is rotatably installed in the outer tank, and cleaning granules for cleaning the outer wall of the inner tank and the inner wall of the outer tank are provided between the inner tank and the outer tank; the tank bottom protective cover (320) is hollow. It is an annular lid, and the flange structure (330) closes the hollow position of the tank bottom protective cover (320) correspondingly; the flange structure (330) has a water permeable passage (332) corresponding to the hollow position portion. The tub in the washing machine according to claim 6, wherein the water permeable passage (332) is provided to allow the washing water to flow out and prevent the washing granules from entering.   A washing machine having the inner tub according to any one of claims 1 to 9.

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