Self-draining inner barrel and washing machine

Abstract

The present invention belongs to the technical field of pulsator fully automatic washing machines, and discloses a self-draining inner barrel and a washing machine. The self-draining inner barrel includes an inner barrel body, a balancing ring, a sealing plug assembly, a return spring, a drainage connecting rod assembly, and an annular water storage tank. A drainage port is provided at the bottom of the inner barrel body; the sealing plug assembly is installed at the drainage port; the return spring presses on the sealing plug assembly; the bottom of the drainage connecting rod assembly is connected to the sealing plug assembly, and the top is a force-applying end; the annular water storage tank is located below the balancing ring; one side of the annular water storage tank is installed on the balancing ring through a rotating shaft; the force-applying end of the drainage connecting rod assembly is located below the annular water storage tank and on the opposite side of the rotating shaft position; the balancing ring is provided with a water injection channel for injecting water into the annular water storage tank. The present invention facilitates the self-drainage of the inner barrel through the above structure, reduces the cost of the self-draining inner barrel, and improves the reliability of the self-draining inner barrel structure.

Description

Technical Field

[0001] The invention belongs to the technical field of pulsator fully-automatic washing machines and relates to a self-draining inner barrel and a washing machine. Background Art

[0002] Existing pulsator fully automatic washing machines generally include an inner barrel and an outer barrel, wherein the inner barrel and the outer barrel are connected, a dehydration hole is provided on the barrel wall of the inner barrel for dehydration, and the outer barrel is closed as a water storage barrel.

[0003] When a washing machine is used for a long time, due to the humid and harsh environment, the inner and outer drums are not cleaned, which will produce bacteria and odors. Some bacteria will even attach to the clothes after they are dried, which is harmful to the health of the user.

[0004] In order to solve the pollution problem caused by water filling between the inner and outer barrels and achieve healthy washing, and at the same time to save water, many types of washing machines currently have a sealed isolation between the inner and outer barrels, that is, there is no washing water between the inner and outer barrels.

[0005] Since there are no dehydration holes around the inner tub, the inner tub takes on the functions of washing and drying clothes at the same time, so the inner tub is also called a washing tub or a dehydrating tub. In order to achieve healthy washing, the washing water needs to be completely stored in the inner tub and the outer tub is empty.

[0006] When the wash is finished and the water needs to be drained, the inner tub lacks an opening at the bottom that connects to the outer tub. Consequently, the water cannot drain away on its own. Furthermore, the water contains a lot of solid matter, such as sand, dirt, and lint. When the impeller stops rotating, these solids quickly settle to the bottom of the inner tub. Therefore, conventional methods have a drain opening at the bottom of the tub.

[0007] Currently, there are two main structures for providing a drain outlet at the bottom of the inner tub of a washing machine:

[0008] The first inner barrel drainage structure is as follows Figure 1 This drainage structure is to set a circular drainage port 102 on the outer periphery of the bottom of the inner barrel 101, and at the same time, a rubber drainage valve plug 103 is configured inside or outside the inner barrel 101 to cooperate with it.

[0009] During washing, the drain valve plug 103 seals the drain port 102. When drainage is required, the drain valve plug 103 is opened by a lifting mechanism 105 (such as a lifting motor) provided on the outer tub 104, thereby achieving drainage.

[0010] When the drainage is completed, the lifting mechanism 105 retracts. At this time, due to the removal of the external force, the drainage valve plug 103 is reset under the action of the reset spring 106, and the drainage valve plug 103 blocks the drainage port 102 again to achieve sealing, and this process is repeated.

[0011] However, this drainage structure has the following problems in practical application:

[0012] Since the drain outlet 102 is arranged at the outer periphery of the bottom of the inner barrel 101, external force is required to open the drain valve plug 103, that is, the drain valve plug 103 is required to open with the help of the lifting mechanism 105 arranged on the outer barrel 104.

[0013] The lifting mechanism 105 is installed on the outer barrel 104, and the position where the inner barrel 101 stops after the dehydration is completed and the brake is applied is random. Therefore, the position where the drain valve plug 103 at the bottom of the inner barrel stops is not necessarily the position where the lifting mechanism is located.

[0014] In order to make the lifting mechanism 105 accurately align with the drain valve plug 103, the position of the inner barrel 101 needs to be adjusted, that is, the positioning mechanism 107 needs to be used to limit the inner barrel 101 to a certain position, so that the drain valve plug 103 can be successfully pushed open.

[0015] It can be seen that in order to open the drain valve plug 103, it is necessary to add a lifting mechanism and a positioning mechanism, which greatly increases the cost.

[0016] The second inner barrel drainage structure is achieved by adding a sealing mechanism, such as Figure 2 shown.

[0017] The sealing mechanism is connected to the drain valve externally mounted on the outer barrel 202 , and the sealing mechanism includes a sealing steel bowl 203 and a sealing ring 204 , wherein the sealing steel bowl 203 is mounted at the center of the inner barrel 201 , and the sealing ring 204 is mounted on the outer barrel 202 .

[0018] The structure of the sealing steel bowl 203 is as follows Figure 3 As shown by Figure 3 It can be seen that a reducer shaft hole 205 is provided at the top center of the sealing steel bowl 203 , and a plurality of fastening bolt holes 206 and drainage holes 207 are provided on the outer periphery of the sealing steel bowl 203 .

[0019] When drainage is required, the drain valve opens and water flows out from the drain hole 207 on the sealed steel bowl 203 (as shown in FIG. Figure 2 When drainage is completed, the drain valve is closed and the process repeats. However, this drainage structure has the following problems:

[0020] Since the sealing steel bowl 203 is installed at the bottom of the inner barrel 201 and the sealing ring 204 is fixed on the outer barrel 202, these two parts are always eccentric. After a period of operation, they will wear out and easily cause water seepage and leakage, resulting in extremely poor reliability.

[0021] In addition, the processing precision of the sealing steel bowl 203 and the sealing ring 204 is extremely high, so the cost is very high. Summary of the Invention

[0022] The purpose of the present invention is to provide a self-draining inner barrel to reduce the cost and assembly difficulty of the self-draining inner barrel, while improving the reliability of the self-draining inner barrel structure. To achieve the above purpose, the present invention adopts the following technical solutions:

[0023] A self-draining inner barrel comprises an inner barrel body and a balance ring; a drainage port is provided at the bottom of the inner barrel body; the self-draining inner barrel further comprises a sealing plug assembly, a return spring, a drainage connecting rod assembly and an annular water storage tank;

[0024] The sealing plug assembly, return spring and drain connecting rod assembly are all located inside the inner barrel;

[0025] Wherein, the sealing plug assembly is installed at the drain outlet;

[0026] The return spring presses on the sealing plug assembly so that the sealing plug assembly seals the drain outlet;

[0027] The drainage connecting rod assembly is vertically arranged, the bottom of the drainage connecting rod assembly is connected to the sealing plug assembly, and the top end is the force-applying end;

[0028] The lower part of the balance ring is provided with a downward-facing annular groove; the annular water storage tank is located in the annular groove with its opening facing upward, and one side of the annular water storage tank is installed in the annular groove through a rotating shaft and can rotate around the rotating shaft;

[0029] The force-applying end of the drainage connecting rod assembly is located below the annular water storage tank and on the opposite side of the rotation axis;

[0030] The balancing ring is provided with a water injection channel for injecting water into the annular water storage tank.

[0031] Preferably, the upper surface of the balance ring is provided with an annular groove on the upper portion of the balance ring;

[0032] The water injection channel is located in the annular sink groove on the upper part of the balance ring, and the water injection channel passes through the balance ring from top to bottom.

[0033] Preferably, a drainage hole is provided at the bottom of the annular water storage tank.

[0034] Preferably, a waterfall plate is provided on the wall of the inner barrel body; wherein the waterfall plate is located below the annular water storage tank and on the opposite side of the rotating shaft; the drainage connecting rod assembly is located on the inner side of the waterfall plate and is installed on the waterfall plate or the side wall of the inner barrel body;

[0035] Channels for the upward and downward movement of the water supply and drainage connecting rod assembly are respectively provided at the top and bottom ends of the waterfall plate.

[0036] Preferably, a compression spring is provided between the top of the waterfall plate and the bottom of the annular water storage tank for resetting the annular water storage tank from a working state to an initial state; wherein the compression spring is connected to the waterfall plate and the annular water storage tank respectively.

[0037] Preferably, the drainage connecting rod assembly adopts a four-link structure, which includes a pressure rod, a positioning rod, a pull rod and a connecting rod; wherein the pressure rod and the connecting rod are mounted on the positioning rod through a pin, and the pull rod is mounted on the pressure rod and the connecting rod through a pin;

[0038] The force-applying end is located at one end of the pressure rod;

[0039] The bottom of the pull rod and the force-applying end are located at diagonal positions of the four-bar structure, and the bottom of the pull rod is connected to the sealing plug assembly.

[0040] Preferably, the pressure rod includes a pressure rod connecting section and a pressure rod force applying section;

[0041] The pressure rod force applying section is connected to the pressure rod connecting section and is inclined upward, and the force applying end is located at the top end of the pressure rod force applying section;

[0042] Define the distance between the top of the compression rod force section mapped to the point A on the extension line of the compression rod connection section and the connection point B between the positioning rod and the compression rod as L1, and the distance between the connection point B and the connection point C between the tension rod and the compression rod as L2;

[0043] Then L1 and L2 have the following relationship: the length of L1 is 2-4 times the length of L2.

[0044] Preferably, the sealing plug assembly comprises a sealing plug and a sealing plug bracket;

[0045] The sealing plug is installed on the sealing plug bracket, and the drainage connecting rod assembly is connected to the sealing plug bracket.

[0046] Preferably, the return spring is a torsion spring, wherein the torsion spring is pressed on the sealing plug bracket.

[0047] In addition, the present invention also proposes a washing machine that uses the self-draining inner barrel as described above, which helps reduce the cost and assembly difficulty of the washing machine while ensuring the reliability of the inner barrel structure.

[0048] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0049] A washing machine comprises an inner tub, an outer tub and an outer tub cover; wherein the inner tub adopts the self-draining inner tub as described above; a water injection pipe is provided on the outer tub cover; water in the water injection pipe reaches an annular water storage tank through a water injection channel.

[0050] The present invention has the following advantages:

[0051] As described above, the present invention provides a self-draining inner tub and washing machine. The present invention achieves self-draining of the inner tub without the need for a lifting mechanism or positioning mechanism, effectively reducing the cost and assembly difficulty of the inner tub drainage structure. Furthermore, because the inner tub has fewer sealing areas, the potential for water leakage is reduced, significantly improving the reliability of the inner tub structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a schematic diagram of the structure of the inner barrel using the first drainage structure in the prior art;

[0053] Figure 2 This is a schematic diagram of the structure of the inner barrel using the second drainage structure in the prior art;

[0054] Figure 3 for Figure 2 Schematic diagram of the structure of the middle sealing steel bowl;

[0055] Figure 4 This is a schematic structural diagram of the self-draining inner barrel in Example 1 of the present invention;

[0056] Figure 5 for Figure 4 A magnified view of part I in FIG;

[0057] Figure 6 Schematic diagram of the installation of the return spring and sealing plug assembly in Example 1 of the present invention;

[0058] Figure 7 This is a schematic structural diagram of the drainage connecting rod assembly in Example 1 of the present invention;

[0059] Figure 8 This is a schematic structural diagram of the bottom of the inner barrel in Example 1 of the present invention;

[0060] Figure 9 This is a top view of the bottom of the inner barrel in Example 1 of the present invention;

[0061] Figure 10 This is a schematic structural diagram of the annular water storage tank in Example 1 of the present invention;

[0062] Figure 11 This is a schematic structural diagram of the annular groove at the lower portion of the balance ring in Example 1 of the present invention;

[0063] Figure 12 This is a schematic diagram of the drainage state of the self-draining inner barrel in Example 1 of the present invention;

[0064] Figure 13 Schematic diagram of the installation structure of the drainage connecting rod assembly in Example 1 of the present invention;

[0065] Figure 14 Schematic diagram of the structure of the drainage connecting rod assembly in Example 2 of the present invention;

[0066] Figure 15 This is a schematic structural diagram of the sealed state of the self-draining inner barrel in Example 3 of the present invention;

[0067] Figure 16 for Figure 15 The enlarged view of Part II in FIG.

[0068] Figure 17 This is a schematic diagram of the working status of the self-draining inner barrel in Example 3 of the present invention.

[0069] Figure 18 This is a schematic structural diagram of a washing machine in Example 4 of the present invention.

[0070] Among them, 101-inner barrel, 102-drain port, 103-drain valve plug, 104-outer barrel, 105-lifting mechanism, 106-reset spring, 107-positioning mechanism, 201-inner barrel, 202-outer barrel, 203-sealing steel bowl, 204-sealing ring, 205-reducer shaft hole, 206-fastening bolt hole, 207-drain hole, 1-sealing plug assembly, 2-reset spring, 3-drainage connecting rod assembly, 4-inner barrel body, 5-drain port, 6-sealing plug, 7-sealing plug bracket, 8 -Extension section, 9-Mounting sleeve, 10-Mounting shaft, 11-Pressure rod, 12-Positioning rod, 13-Pull rod, 14-Connecting rod, 15-Pressure rod connecting section, 16-Pressure rod force section, 17-L-shaped handle, 18-Mounting groove, 19-Auxiliary rod, 20-Outer barrel, 21-Balance ring, 22-Outer barrel cover, 23-Annular water storage tank, 24-Annular groove, 25-Rotating shaft, 26-Annular sink groove on the upper part of the balance ring, 27-Compression spring, 28-Waterfall plate, 29-Water injection channel, 30-Water injection pipe. DETAILED DESCRIPTION

[0071] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0072] Example 1

[0073] like Figure 4 and Figure 5 As shown, this embodiment 1 describes a self-draining inner barrel, which includes an inner barrel body 4, a balance ring 21, a sealing plug assembly 1, a return spring 2, a drainage connecting rod assembly 3 and an annular water storage tank 23.

[0074] Among them, the sealing plug assembly 1, the return spring 2 and the drainage connecting rod assembly 3 are all located on the inner side of the inner barrel body 4.

[0075] A drain port 5 is provided at the bottom of the inner barrel body 4. Figure 8 and Figure 9 shown.

[0076] The sealing plug assembly is installed at the drain outlet 5. When drainage is not required, the sealing plug assembly 1 blocks the drain outlet 5; when drainage is required, the sealing plug assembly 1 is opened to drain water through the drain outlet 5.

[0077] like Figure 5 As shown, the sealing plug assembly 1 includes a sealing plug 6 and a sealing plug bracket 7.

[0078] The sealing plug 6 is installed on the sealing plug bracket 7, and the drainage connecting rod assembly 3 is connected to the sealing plug bracket 7.

[0079] The sealing plug 6 is, for example, a rubber plug, and the size of the sealing plug 6 is adapted to the drain port 5 .

[0080] There are many ways to install the sealing plug 6 on the sealing plug bracket 7, for example, a card slot is set on the back of the sealing plug 6 (that is, the side away from the drain outlet 5), and a card block is set on the sealing plug bracket 7, and the sealing plug 6 is clamped with the sealing plug bracket 7.

[0081] Of course, the sealing plug 6 can also be installed on the sealing plug bracket 7 by bolt connection. It should be noted that the above is only exemplary, and there are many ways to connect the sealing plug 6 and the sealing plug bracket 7, which will not be repeated here.

[0082] In addition, this embodiment does not impose any specific restrictions on the specific structures of the sealing plug 6 and the sealing plug bracket 7. As long as the sealing plug 6 can be sealed at the drain outlet 5 and the sealing plug bracket 7 can realize the installation of the sealing plug 6, it will be sufficient.

[0083] like Figure 5 As shown, the return spring 2 presses on the sealing plug assembly 1 and causes the sealing plug assembly to seal the drain outlet 5. Under normal conditions, the drain outlet 5 is always in a closed state to ensure the airtightness of the inner barrel body 4.

[0084] The return spring 2 is a torsion spring. Under the pressing action of the torsion spring, the sealing plug assembly 1 is sealed at the drain outlet 5. When the sealing plug assembly 1 is subjected to a force greater than the force of the torsion spring and in the opposite direction, it can be lifted and the drain outlet 5 is opened.

[0085] The torsion spring can increase the sealing effect of the drain outlet to ensure that there is no water leakage. At the same time, it will close quickly after the water is drained to play a sealing role.

[0086] like Figure 6 As shown, taking the double torsion spring structure as an example, the connection structure of the return spring and the sealing plug assembly is explained.

[0087] An extension section 8 is provided on the side of the sealing plug bracket 7, and a mounting sleeve 9 is provided on the extension section 8. The mounting sleeve 9 is located in the middle of the double torsion spring, and a mounting shaft 10 passes through the torsion spring and the mounting sleeve 9.

[0088] The two ends of the mounting shaft 10 are respectively mounted on the bottom of the inner barrel through a mounting shaft seat (not shown in the figure).

[0089] The middle section of the double torsion spring presses on the sealing plug bracket 7 and seals the sealing plug 6 at the drain outlet 5.

[0090] Of course, the above is only for the convenience of explaining the connection structure between the reset spring and the sealing plug assembly, and is not intended to limit the present invention. The torsion spring in this embodiment is not limited to the above-mentioned double torsion spring, and can also be a single torsion spring structure, for example.

[0091] The drainage connecting rod assembly 3 is arranged vertically. Its function is to transmit the force to the sealing plug assembly 1 through the connecting rod assembly 3 when an external force acts, thereby overcoming the elastic force of the reset spring 2 to drive the sealing plug assembly 1 to lift up, so that the drain outlet 5 is opened.

[0092] like Figure 4 and Figure 5 As shown, the top of the drainage connecting rod assembly 3 is the force-applying end, and the bottom is connected to the sealing plug assembly 1.

[0093] When an external force acts on the force-applying end of the drain rod assembly 3, the external force is transmitted to the sealing plug assembly 1 through the drain rod assembly 3, and drives the sealing plug assembly 1 to lift upward to open or keep the drain outlet open.

[0094] like Figure 7 As shown, the drainage connecting rod assembly 3 adopts a four-bar structure, wherein the top end of the four-bar structure is a force-applying end, and the bottom end of the four-bar structure, which is diagonally opposite to the force-applying end, is connected to the sealing plug assembly 1.

[0095] This embodiment utilizes a four-bar linkage structure for force transmission, so that when an external force acts on the force-applying end, the external force can be transmitted to the diagonal position of the four-bar linkage through the four-bar linkage structure and then act on the sealing plug assembly 1.

[0096] The four-link structure includes a compression rod 11 , a positioning rod 12 , a pull rod 13 and a connecting rod 14 .

[0097] The pressure rod 11 and the connecting rod 14 are mounted on the positioning rod 12 via a pin, and the pull rod 13 is mounted on the pressure rod 11 and the connecting rod 14 via a pin. The force-applying end is located at one end of the pressure rod 11.

[0098] The bottom of the pull rod and the force-applying end are located at diagonal positions of the four-bar structure, and the bottom of the pull rod is connected to the sealing plug assembly.

[0099] The positioning rod 12 can be installed on the waterfall plate 28 described below, and of course, can also be installed on the side wall of the inner barrel body 4.

[0100] Furthermore, the present embodiment also designs the structure of the pressure rod 11, such as Figure 7 shown.

[0101] The pressure rod 11 includes a pressure rod connecting section 15 and a pressure rod force applying section 16. The pressure rod force applying section 16 is connected to the pressure rod connecting section 15 and tilted upward, with the force applying end P located at the top end of the pressure rod force applying section 16.

[0102] The above design facilitates the application of external force on the drainage connecting rod assembly 3 .

[0103] The distance between the top of the pressure rod force application section 16 mapped to the point A on the extension line of the pressure rod connection section and the connection point B between the positioning rod and the pressure rod is defined as L1, and the distance between the connection point B and the connection point C between the pull rod and the pressure rod is defined as L2.

[0104] Then L1 and L2 have the following relationship: the length of L1 is 2-4 times the length of L2, for example, 3 times.

[0105] Through the above design, the lever principle is utilized so that the force-applying end can open the sealing plug assembly 1 with a relatively small external force.

[0106] As for the connection method between the drainage connecting rod assembly 3 and the sealing plug assembly 1, more specifically, in this embodiment 1, there are multiple connection methods between the pull rod 13 and the sealing plug bracket 7, such as a hinged connection.

[0107] Of course, the two can also be connected by a snap-on connection, that is, a card block or a card slot is set at the bottom of the pull rod 13 and the back of the sealing plug bracket 7 respectively, and the pull rod 13 and the sealing plug bracket 7 are connected through the cooperation of the card block and the card slot.

[0108] This embodiment also provides a contact structure, such as Figure 5 An L-shaped handle 17 is provided on the back of the sealing plug bracket 7, and the bottom of the pull rod 13 is formed into an abutting portion abutting against the L-shaped handle 17 by, for example, deformation.

[0109] This design ensures that when the pull rod 13 moves upward due to external force, it pulls the L-shaped handle 17 upward. At this time, under the action of external force, the sealing plug assembly 1 (sealing plug bracket 7) is lifted upward, so that the drain outlet 5 is opened.

[0110] The above is merely exemplary, and other easily conceivable connection methods may be used between the drainage connecting rod assembly 3 and the sealing plug assembly 1, as long as the pull rod 13 can pull the sealing plug bracket 7 upwards. Details will not be given here.

[0111] like Figure 4As shown, the annular water storage tank 23 is located below the balance ring 21 and has an opening facing upward. One side of the annular water storage tank 23 is mounted on the balance ring 21 via a rotating shaft 25 and can rotate around the rotating shaft.

[0112] The function of the annular water storage tank 23 is to apply external force to the drainage connecting rod assembly when there is water inside and the water reaches a certain weight.

[0113] Specifically, when there is water in the annular water storage tank 23 and it reaches a certain weight, under the action of gravity, the side of the annular water storage tank 23 away from the rotating shaft 25 will move downward around the rotating shaft and press down the drainage connecting rod assembly (the pressure rod 11).

[0114] Since the drainage connecting rod assembly adopts a four-link structure, when the pressure rod 11 moves downward, the pull rod 13 will move upward, thereby pulling the sealing plug bracket 7 upward, so that the sealing plug 6 is lifted and the drain outlet 5 is opened.

[0115] At the same time, due to the special four-link structure design in this embodiment 1, the drain outlet 5 can be opened with less force.

[0116] The structure of the annular water storage tank 23 in this embodiment is as follows Figure 10 shown.

[0117] In addition, in order to protect the annular water storage tank 23, a downward annular groove 24 is provided at the lower part of the balance ring 21. Figure 4 As shown. Among them, the structure of the annular groove 24 is as follows Figure 11 shown.

[0118] The annular water storage tank 23 is located in the annular groove 24 . The annular water storage tank 23 mentioned above is installed through the rotating shaft 25 . Specifically, one side of the annular water storage tank 23 is installed in the annular groove 24 through the rotating shaft 25 .

[0119] After installation, the annular water storage tank 23 can rotate around the rotation axis. Figure 12 shown.

[0120] A shaft mounting seat is provided in the annular groove 24 at a position corresponding to the shaft 25 for mounting the shaft 25. The annular groove 24 protects the annular water storage tank 23 and prevents contact between the clothes and the annular water storage tank 23.

[0121] The force-applying end P of the drainage connecting rod assembly 3 is located below the annular water storage tank 23 and on the opposite side of the rotating shaft 25. The force-applying end of the drainage connecting rod assembly is in contact connection with the bottom of the annular water storage tank 23.

[0122] Here, the contact connection refers to the contact between the force-applying end P of the drainage connecting rod assembly 3 and the bottom of the annular water storage tank 23 .

[0123] In addition, a water injection channel 29 is provided on the balance ring for injecting water into the annular water storage tank 23. Figure 4 As shown, the upper surface of the balance ring 21 is provided with a balance ring upper annular groove 26 along the circumferential direction of the balance ring 21 .

[0124] The water injection channel 29 is arranged in the annular sink 26 of the balance ring upper part. In the present embodiment, the water injection channel 29 can be one, two or three, etc., but should not be too many. Each water injection channel 29 all runs through the balance ring 21 along the up and down direction.

[0125] In addition, a drainage hole is provided at the bottom of the annular water storage tank 23 .

[0126] When the washing water is drained, the water in the annular water storage tank 23 must also be drained to facilitate the reset of the annular water storage tank 23. The diameter of the water injection channel 29 is much larger than the diameter of the bottom drainage hole of the annular water storage tank 23.

[0127] This design can ensure that the amount of water flowing into the annular water storage tank 23 is greater than the amount of water flowing out of the annular water storage tank 23. Therefore, it can ensure that the water volume of the annular water storage tank 23 reaches the first preset weight and open the drain port 5.

[0128] When the inner barrel body 4 is drained and water filling is stopped, the water in the annular water storage tank 23 will flow out through the bottom drainage hole.

[0129] At this time, since there is no water or little water inside the annular water storage tank 23, the sealing plug assembly 1 is re-sealed at the drain outlet 5 under the action of the return spring 2, the pressure rod 11 moves upward, and the force end P pushes the annular water storage tank 23 back into the annular groove 24.

[0130] At this point, one drainage process is completed, ready for the next washing, and waiting for the next drainage process.

[0131] like Figure 4 As shown, a waterfall plate 28 is provided on the wall of the inner barrel body 4.

[0132] The waterfall plate 28 is located below the annular water storage tank 23 and on a side away from the rotating shaft 25 .

[0133] The drainage connecting rod assembly 3 is located on the inner side of the waterfall plate 28 (ie, the side close to the inner barrel wall) and is installed on the waterfall plate 28. Figure 13 As shown, the waterfall plate 28 plays a role in installing and protecting the drainage link assembly 3.

[0134] Specifically, the positioning rod 12 of the drainage connecting rod assembly 3 is mounted to the inner side of the waterfall plate 28 by means of bolts.

[0135] Channels for the upward and downward movement of the water supply and drainage connecting rod assembly are respectively provided at the top and bottom ends of the waterfall plate 28 .

[0136] The above structural design of the present embodiment 1 greatly reduces the cost of the self-draining inner barrel, and since there are fewer sealing parts in the inner barrel in this embodiment, the hidden danger of water leakage is reduced, thus well ensuring the reliability of the inner barrel structure.

[0137] Example 2

[0138] This embodiment 2 also describes a self-draining inner barrel. Except for the following technical features that are different from the above embodiment 1, the rest of the technical features of the self-draining inner barrel can refer to the above embodiment 1.

[0139] like Figure 14 As shown, the drainage connecting rod assembly 3 further includes an auxiliary rod 19. One end of the auxiliary rod 19 is connected to the pressure rod 11 through a pin, and the other end of the auxiliary rod 19 is connected to the connecting rod 14 through a pin.

[0140] The auxiliary rod 19 and the pull rod 13 are respectively located on opposite sides of the positioning rod 12, and the positioning rod 12 is fixed. By adding the auxiliary rod, the stability of the drainage connecting rod assembly 3 is improved and the drainage connecting rod assembly 3 is prevented from shaking.

[0141] Example 3

[0142] This embodiment 3 also describes a self-draining inner barrel. Except for the following technical features that are different from those of the above embodiment 1, the remaining technical features of the self-draining inner barrel can refer to those of the above embodiment 1.

[0143] like Figure 15 As shown, a return spring is also provided between the top of the waterfall plate 28 and the bottom of the annular water storage tank 23 (the side away from the rotating shaft 25 ), and the return spring is, for example, a compression spring 27 .

[0144] The function of the compression spring 27 is to enable the annular water storage tank 23 to be reset from the working state to the initial state.

[0145] The bottom of the annular water storage tank 23 is provided with, for example, a spring mounting column (the structure is relatively conventional, not shown).

[0146] The top of the compression spring 27 is connected to the bottom of the annular water storage tank 23, and the bottom end is set in the installation groove 18 reserved in advance on the top of the waterfall plate 28 (for example, a spring installation column is also set in the installation groove 18). Figure 16 shown.

[0147] By adding the compression spring 27 , the annular water storage tank 23 can be better reset.

[0148] like Figure 17As shown, when drainage is required, water is first poured into the annular water storage tank 23. When the amount of water in the annular water storage tank 23 reaches a second preset weight, the drainage connecting rod assembly and the compression spring 27 are pressed down. At this time, it is necessary to overcome the elastic force of the reset spring 2 and the compression spring 27 at the same time to drive the sealing plug assembly 1 to lift up, so that the drain outlet 5 is opened or remains open.

[0149] When the drainage is completed, the water filling is stopped. At this time, the water in the annular water storage tank 23 flows out through the drainage hole. There is no water or little water in the annular water storage tank 23. Under the action of the reset spring 2 and the compression spring 23, the annular water storage tank 23 is reset.

[0150] It should be noted that, since the weight of the annular water storage tank 23 needs to overcome the elastic force of the return spring 2 and the compression spring 27 after the compression spring 27 is added, the second preset weight needs to be greater than the first preset weight.

[0151] Example 4

[0152] This embodiment 4 describes a fully automatic washing machine with a pulsator. The washing machine adopts the self-draining inner drum as described in any one of the above embodiments 1 to 3, which helps to reduce the cost of the washing machine while ensuring the reliability of the inner drum structure.

[0153] like Figure 18 As shown, the pulsator fully automatic washing machine includes an inner tub, an outer tub 20 and an outer tub cover 22. A water injection pipe 30 is provided on the outer tub cover 22; wherein the water outlet end of the water injection pipe 30 is downwardly aligned with the annular sink 26 on the upper part of the balance ring.

[0154] When drainage is required, water is injected into the annular trough 26 on the upper portion of the balance ring through the water injection pipe 30 , and the water in the annular trough 26 on the upper portion of the balance ring falls into the annular water storage tank 23 along the water injection channel 29 .

[0155] When the amount of water in the annular water storage tank 23 reaches the first preset weight, it moves downward and moves down to the drainage connecting rod assembly 3, and is transmitted downward to the sealing plug assembly 1 through the drainage connecting rod assembly 3, so that the sealing plug assembly is lifted and the drain outlet 5 is opened.

[0156] The washing machine in the third embodiment, by applying the above-mentioned self-draining inner drum, can realize the self-draining process of the inner drum without the aid of a lifting mechanism and a positioning mechanism, thereby effectively reducing the cost of the inner drum and the difficulty of assembly.

[0157] At the same time, since the number of sealing parts in the inner barrel is reduced, the reliability of the inner barrel structure can be effectively guaranteed.

[0158] Of course, the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiments. It should be noted that all equivalent substitutions and obvious deformation forms made by any technician familiar with this field under the guidance of this specification fall within the substantive scope of this specification and should be protected by the present invention.

Claims

1. A self-draining inner barrel, comprising an inner barrel body and a balance ring; a drain port is provided at the bottom of the inner barrel body; characterized in that: The self-draining inner barrel also includes a sealing plug assembly, a return spring, a drainage connecting rod assembly and an annular water storage tank; Among them, the sealing plug assembly, the return spring and the drainage connecting rod assembly are all located on the inner side of the inner barrel; The sealing plug assembly is installed at the drain outlet; The return spring presses on the sealing plug assembly so that the sealing plug assembly seals the drain outlet; The drainage connecting rod assembly is arranged vertically; the bottom of the drainage connecting rod assembly is connected to the sealing plug assembly, and the top end is the force-applying end; The lower part of the balance ring is provided with an annular groove facing downward; the annular water storage tank is located in the annular groove, and its opening faces upward; one side of the annular water storage tank is installed in the annular groove through a rotating shaft and can rotate around the rotating shaft; The force-applying end of the drainage connecting rod assembly is located below the annular water storage tank and on the opposite side of the rotating shaft; The balancing ring is provided with a water injection channel for injecting water into the annular water storage tank; When there is water in the annular water storage tank and the water volume reaches a first preset weight, it moves downward and presses the drainage connecting rod assembly, which is then transmitted downward to the sealing plug assembly through the drainage connecting rod assembly, overcoming the elastic force of the return spring and causing the sealing plug assembly to lift up, thus opening the drain outlet; The upper surface of the balance ring is provided with an annular groove on the upper portion of the balance ring; The water injection channel is located in the annular sink groove on the upper part of the balance ring, and the water injection channel penetrates the balance ring from top to bottom; A drainage hole is provided at the bottom of the annular water storage tank; wherein the diameter of the water injection channel is larger than the diameter of the drainage hole.

2. The self-draining inner barrel according to claim 1, characterized in that: A waterfall plate is provided on the wall of the inner barrel body; wherein the waterfall plate is located below the annular water storage tank and on the opposite side of the rotating shaft; the drainage connecting rod assembly is located on the inner side of the waterfall plate and is installed on the waterfall plate or the side wall of the inner barrel body; Channels for the drainage connecting rod assembly to move upward and downward are respectively provided at the top and bottom ends of the waterfall plate.

3. The self-draining inner barrel according to claim 2, characterized in that: A compression spring is provided between the top of the waterfall plate and the bottom of the annular water storage tank for resetting the annular water storage tank from a working state to an initial state; wherein the compression spring is connected to the waterfall plate and the annular water storage tank respectively.

4. The self-draining inner barrel according to claim 1, characterized in that: The drainage connecting rod assembly adopts a four-link structure, which includes a pressure rod, a positioning rod, a pull rod and a connecting rod; wherein the pressure rod and the connecting rod are installed on the positioning rod through a pin, and the pull rod is installed on the pressure rod and the connecting rod through a pin; The force-applying end is located at one end of the pressure rod; The bottom of the pull rod and the force-applying end are located at diagonal positions of the four-bar structure, and the bottom of the pull rod is connected to the sealing plug assembly.

5. The self-draining inner barrel according to claim 4, characterized in that: The pressure rod comprises a pressure rod connecting section and a pressure rod force applying section; The pressure rod force applying section is connected to the pressure rod connecting section and is inclined upward, and the force applying end is located at the top end of the pressure rod force applying section; Define the distance between the top of the compression rod force section mapped to the point A on the extension line of the compression rod connection section and the connection point B between the positioning rod and the compression rod as L1, and the distance between the connection point B and the connection point C between the tension rod and the compression rod as L2; Then L1 and L2 have the following relationship: the length of L1 is 2-4 times the length of L2.

6. The self-draining inner barrel according to claim 1, characterized in that: The sealing plug assembly includes a sealing plug and a sealing plug bracket; Wherein, the sealing plug is installed on the sealing plug bracket, and the drainage connecting rod assembly is connected to the sealing plug bracket.

7. The self-draining inner barrel according to claim 6, characterized in that: The reset spring is a torsion spring, wherein the torsion spring presses on the sealing plug bracket.

8. A washing machine comprising an inner tub, an outer tub and an outer tub cover; characterized in that: The inner barrel adopts the self-draining inner barrel as described in any one of claims 1 to 7 above; A water injection pipe is provided on the outer barrel cover; wherein, the injected water reaches the annular water storage tank through the water injection channel.

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