Pulsator washing machine and its spray system and outer drum cover

Abstract

The present invention belongs to the field of spraying equipment, and specifically provides a pulsator washing machine and its spraying system and outer barrel cover. The present invention aims to solve the problem that the existing pulsator washing machine with a spraying function has a poor effect when spraying clothes. To this end, the spraying system of the present invention includes a circulation pump and a plurality of nozzles arranged on the outer barrel cover. Among them, the water inlet of the circulation pump is connected to the inner cavity of the outer barrel, and the water outlet of the circulation pump is connected to the plurality of nozzles respectively. The extension direction of the spray port of each nozzle is different from the angle between the horizontal direction. When the circulation pump is working, the washing water sprayed from the plurality of nozzles can form a height difference on each concentric circle of the inner barrel, and then the clothes floating on the liquid surface in the inner barrel are sprayed three-dimensionally and in all directions, so that the washing water fully soaks the clothes, improves the spraying effect of the pulsator washing machine, and optimizes the washing effect of the pulsator washing machine.

Description

Technical Field

[0001] The invention belongs to the field of spraying equipment, and specifically provides a pulsator washing machine and a spraying system and an outer drum cover thereof. Background Art

[0002] The pulsator washing machine mainly includes a housing, an outer barrel, an inner barrel and a pulsator. The outer barrel is fixedly arranged in the housing, the inner barrel is rotatably arranged in the outer barrel, and the pulsator is rotatably arranged at the bottom of the outer barrel. When the pulsator washing machine performs washing and rinsing operations, the pulsator drives the washing water and clothes in the outer barrel to rotate to achieve the purpose of washing clothes. When the pulsator washing machine performs a spin-drying operation, the inner barrel drives the clothes inside it to rotate at a high speed, so that the water on the clothes is separated from the clothes under the action of centrifugal force.

[0003] The following problems often occur during the use of a pulsator washing machine: first, washing powder and laundry liquid are deposited at the bottom of the outer drum and are not easily dissolved by the washing water; second, when there are many clothes to be washed, some clothes may not be soaked by the washing water; third, clothes such as down often float above the surface of the washing water during washing, resulting in poor washing effect.

[0004] In order to solve the above problems, existing pulsator washing machines usually have a spray device on the outer drum cover. For example, the patent document with the announcement number CN204282066U discloses a pulsator washing machine, on which the outer drum cover is provided with a plurality of nozzles. When the pulsator washing machine is working, the circulating water pump can pump the washing water in the outer drum to the plurality of nozzles, so that the plurality of nozzles spray the washing water onto the clothes in the inner drum. However, the spraying effect of the pulsator washing machine is poor, and the clothes floating above the washing water surface cannot be sprayed in all directions.

[0005] Accordingly, the art needs a new pulsator washing machine and its spray system and outer drum cover to solve the above problems. Summary of the invention

[0006] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing pulsator washing machine with a spray function has a poor effect when spraying clothes, the present invention provides a spray system for a pulsator washing machine, the pulsator washing machine includes a housing, an outer barrel fixedly arranged in the housing, and an inner barrel rotatably arranged in the outer barrel, the spray system includes a water supply device and a plurality of nozzles, each of the nozzles is arranged on the top of the outer barrel, and the water inlet of each of the nozzles is connected to the water supply device, the spray port of each of the nozzles points to the inner barrel, and the angle between the axis of each of the nozzles and the horizontal direction is different, so that the washing water forms a height difference in the circumferential direction of the inner barrel after being sprayed by the plurality of nozzles.

[0007] In the preferred technical solution of the above-mentioned spray system, the nozzle includes a nozzle body and a water retaining structure fixedly connected to or integrally formed with the nozzle body, the injection port is formed between the nozzle body and the water retaining structure, and the angle between the axis of each nozzle body and the horizontal direction is different.

[0008] In a preferred technical solution of the above-mentioned spray system, an arc-shaped recess is provided on the side of the water retaining structure facing the nozzle body, and the recess is used to disperse the washing water sprayed from the nozzle body and reflect it into the inner barrel.

[0009] In the preferred technical solution of the above-mentioned spray system, the pulsator washing machine further comprises an outer barrel cover arranged on the top of the outer barrel, and each of the nozzles is fixedly connected to or integrally formed with the outer barrel cover.

[0010] In a preferred technical solution of the above-mentioned spray system, all the nozzles are arranged at equal intervals along the circumference of the outer barrel.

[0011] In a preferred technical solution of the above-mentioned spray system, the spray system further comprises an annular cavity provided on the outer barrel cover, and the annular cavity is respectively connected with the water supply device and each of the nozzles.

[0012] In the preferred technical solution of the above-mentioned spray system, the water supply device is a circulation pump, the water inlet port of the circulation pump is connected to the inner cavity of the outer barrel, and the water outlet port of the circulation pump is connected to the annular cavity; or, the water supply device is a water inlet valve, the water inlet valve port of the water inlet valve leads to the outside, and the water outlet valve port of the water inlet valve is connected to the annular cavity.

[0013] Furthermore, the present invention also provides an outer drum cover of a pulsator washing machine, the outer drum cover comprising a cover body and a plurality of nozzles fixedly connected to or integrally formed with the cover body, the spray port of each nozzle pointing toward the inner drum of the pulsator washing machine, and the angle between the axis of each nozzle and the horizontal direction is different, so that the washing water forms a height difference in the direction around the axis of the inner drum after being sprayed by the plurality of nozzles.

[0014] In the preferred technical solution of the above outer barrel cover, all the nozzles are arranged at equal intervals along the circumference of the outer barrel cover; and / or, an annular cavity connected to each of the nozzles is provided on the cover body; and / or, a shielding structure for shielding the nozzles is provided on the cover body.

[0015] In addition, the present invention also provides a pulsator washing machine, which includes the spray system described in any one of the above preferred embodiments.

[0016] Those skilled in the art will appreciate that, in the preferred technical solution of the present invention, a plurality of nozzles are arranged on the top of the outer barrel, and the extension direction of the spray port of each nozzle is made at a different angle to the horizontal direction, so that the washing water sprayed from the plurality of nozzles can form a height difference in the circumferential direction of the inner barrel, so that the washing water sprayed from each nozzle is at a different height when passing through the axis of the inner barrel, thereby enabling the washing water sprayed from the plurality of nozzles to spray the clothes floating above the surface of the washing water in a three-dimensional and all-round manner, so that the washing water fully soaks the clothes, thereby improving the spraying effect of the pulsator washing machine and optimizing the washing effect of the pulsator washing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 is a top view of the pulsator washing machine of the present invention;

[0019] Figure 2 yes Figure 1 The cross-sectional view along the AA direction;

[0020] Figure 3 is a side view of the outer barrel cover of the present invention;

[0021] Figure 4 is a top view of the outer barrel cover of the present invention;

[0022] Figure 5 is a bottom view of the outer barrel cover of the present invention;

[0023] Figure 6 yes Figure 4 A cross-sectional view along the B1-B1 direction (first embodiment);

[0024] Figure 7 yes Figure 4 A cross-sectional view along the B2-B2 direction (first embodiment);

[0025] Figure 8 is a first side view of a nozzle of the present invention (first embodiment);

[0026] Fig. 9 is a second side view of the nozzle of the present invention (first embodiment);

[0027] Fig.10 is a front view of a nozzle of the present invention (first embodiment);

[0028] Fig.11 yes Fig.10 A cross-sectional view along the CC direction (first embodiment);

[0029] Fig.12The spraying effect of the nozzle in the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0030] Fig.13 The spraying effect of the nozzle in the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0031] Fig.14 yes Figure 4 A cross-sectional view along the B1-B1 direction (second embodiment);

[0032] Fig.15a The first nozzle along Fig.10 Cross-sectional view along CC direction (second embodiment);

[0033] Fig.15b The second nozzle is along Fig.10 Cross-sectional view along CC direction (first embodiment).

[0034] List of reference numerals:

[0035] 1. Box body; 11. Plate base; 12. Door cover; 2. Outer barrel; 21. Outer barrel cover; 211. Cover body; 2111. Shielding structure; 212. Annular cavity; 213. Water inlet; 3. Inner barrel; 4. Impeller; 5. Driving motor; 6. Drain valve; 7. Drain pipe; 8. Circulating pump; 9. Circulating water pipe; 10. Nozzle; 101. Nozzle body; 1011. Water spray channel; 102. Water retaining structure; 1021. Concave portion. DETAILED DESCRIPTION

[0036] It should be understood by those skilled in the art that the embodiments of this section are only used to explain the technical principles of the present invention, and are not used to limit the protection scope of the present invention. For example, although the components in the drawings are drawn according to a certain proportional relationship, this proportional relationship is not immutable, and those skilled in the art can make adjustments to it as needed to adapt to specific application scenarios, and the adjusted technical solutions will still fall within the protection scope of the present invention.

[0037] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] like Figure 1 and Figure 2 As shown, the pulsator washing machine of the present invention mainly includes a housing 1, an outer barrel 2, an inner barrel 3, a pulsator 4, a driving motor 5, a drain valve 6 and a drain pipe 7. Among them, the outer barrel 2 is fixedly arranged inside the housing 1, the inner barrel 3 is rotatably arranged in the outer barrel 2, and the pulsator 4 is rotatably arranged at the bottom of the inner barrel 3. The driving motor 5 is fixedly mounted on the housing 1 or the outer barrel 2, and the driving motor 5 is respectively driven and connected with the inner barrel 3 and the pulsator 4 through a rotating shaft. The driving motor 5 can selectively drive the inner barrel 3 and the pulsator 4 to rotate. Since the technical means for the driving motor 5 to selectively drive the inner barrel 3 and the pulsator 4 are technical means well known to those skilled in the art, no further explanation is given here. Further, the water inlet valve port of the drain valve 6 is connected to the inner cavity of the outer barrel 2 through a water pipe, and the water outlet valve port of the drain valve 6 is connected to the outside of the housing 1 through the drain pipe 7. When the washing water in the outer barrel 2 needs to be discharged, the drain valve 6 is opened, and the washing water is discharged to the outside from the drain pipe 7.

[0040] Preferably, the drain port on the outer tub 2 connected to the drain valve 6 is located at the bottom of the outer tub 2 so that the washing water in the outer tub 2 can be drained through the drain port. Further preferably, the drain valve 6 is mounted on the inner wall of the housing 1, or those skilled in the art can also mount the drain valve 6 on the outer wall of the outer tub 2 as needed. In addition, those skilled in the art can also omit the water pipe between the drain valve 6 and the outer tub 2 as needed, so that the drain valve 6 is directly mounted on the outer tub 2 and communicated with the inner cavity of the outer tub 2.

[0041] like Figure 2 As shown, a tray seat 11 is installed on the top of the box body 1 of the present invention, and the tray seat 11 is pivotally connected to a door cover 12. An outer barrel cover 21 is provided on the top of the outer barrel 2, and the outer barrel cover 21 is used to cover the upper edge of the inner barrel 3 to prevent clothes from entering the interlayer between the outer barrel 2 and the inner barrel 3.

[0042] like Figures 3 to 6As shown, the outer barrel cover 21 mainly includes a cover body 211, an annular cavity 212 and a water inlet 213, wherein the annular cavity 212 and the water inlet 213 are both arranged on the cover body 211. It can be understood by those skilled in the art that the cover body 211 can be a one-piece structure or can be assembled from multiple split structures. Exemplarily, the cover body 211 includes an upper cover body and a lower cover body, and at least one of the upper cover body and the lower cover body is provided with an annular groove. When the upper cover body and the lower cover body are installed together, the upper cover body and the lower cover body seal the annular groove into the annular cavity 212.

[0043] like Figure 2 , Figure 5 and Figure 6 As shown, the pulsator washing machine of the present invention further includes a spray system, which includes a circulation pump 8, a circulation water pipe 9, an annular cavity 212, a water inlet 213 and a plurality of nozzles 10.

[0044] like Figure 2 As shown, the water inlet of the circulation pump 8 is connected to the inner cavity of the outer barrel 2 through a water pipe, and the water outlet of the circulation pump 8 is connected to the water inlet 213 on the outer barrel cover 21 through a circulation water pipe 9. Preferably, the water outlet on the outer barrel 2 connected to the circulation pump 8 is located at the bottom of the outer barrel 2. Further preferably, the circulation pump 8 is installed on the inner wall of the box body 1, or those skilled in the art can also install the circulation pump 8 on the outer wall of the outer barrel 2 as needed. In addition, those skilled in the art can also omit the water pipe between the circulation pump 8 and the outer barrel 2 as needed, so that the circulation pump 8 is directly installed on the outer barrel 2 and communicated with the inner cavity of the outer barrel 2.

[0045] like Figure 5 and 6 As shown, a plurality of nozzles 10 are fixedly connected to or integrally formed on the cover body 211 at equal intervals along the circumference of the outer barrel cover 21, and each nozzle 10 is respectively connected to the annular cavity 212. Further, the injection port of each nozzle 10 is directed to the inner barrel 3. In addition, those skilled in the art may also arrange the plurality of nozzles 10 on the cover body 211 at non-equal intervals as required.

[0046] like Figure 6 and Figure 7 As shown, in the first embodiment of the present invention, each nozzle 10 is the same, and the angle between the extension direction of the jet outlet of each nozzle 10 and the horizontal direction (or vertical direction) is different. Figure 6 The nozzle 10 on the left side of the middle portion has a nozzle body 101 (such as Figure 8 The included angle between the axis of the vertical direction is 90°; Figure 6 The nozzle 10 on the right side of the middle, its nozzle body 101 (such as Figure 8 The included angle between the axis of the vertical direction is 98°; Figure 7The nozzle 10 on the right side of the middle, its nozzle body 101 (such as Figure 8 The angle between the axis of the vehicle body and the vertical direction is 76°.

[0047] It is understood by those skilled in the art that, based on the different angles between each nozzle 10 and the horizontal direction (or vertical direction), the washing water will form a height difference (such as 0.04mm) along the circumferential direction of the inner tub 3 after being sprayed by the nozzle 10. Figure 6 and Figure 7 As shown in FIG. 1 , the heights of the washing water sprayed by each nozzle 10 when passing through the axis of the inner tub 3 are also different. Therefore, the sprayed washing water can spray the clothes floating above the washing water level in the inner tub 3 in a three-dimensional and all-round manner, especially when the clothes rotate with the rotation of the pulsator 4.

[0048] In addition, those skilled in the art may also divide the plurality of nozzles 10 into a plurality of groups as required, so that each group includes at least two nozzles 10. All nozzles 10 in each group of nozzles 10 have the same angle with the horizontal direction (or vertical direction). Those skilled in the art will appreciate that the plurality of nozzles 10 in the same group may be arranged adjacently or at intervals, and the number of nozzles 10 in each group may be the same or different.

[0049] Continue reading Figure 5 and Figure 6 An annular shielding structure 2111 is also provided on the inner side of the cover body 211 of the outer barrel cover 21 , and the shielding structure 2111 is used to shield the nozzle 10 to prevent the nozzle 10 from being observed by the user, so as to optimize the appearance of the outer barrel cover 21 .

[0050] Although not shown in the figures, in another feasible embodiment of the present invention, a person skilled in the art can, as needed, directly fix a plurality of nozzles 10 to the top of the outer barrel 2, and then connect the circulating water pipe 9 to each nozzle 10 directly or via other water pipes.

[0051] like Figure 2 As shown, when the circulating pump 8 is working, it can suck out the washing water in the outer barrel 2 and pump it to the annular cavity 212 on the outer barrel cover 21 through the circulating water pipe 9, so that the nozzle 10 sprays the washing water into the inner barrel 3 to spray the clothes in the inner barrel 3.

[0052] In addition, although not shown in the figure, in another feasible embodiment of the spray system of the present invention, those skilled in the art can also connect the water inlet 213 on the outer tub cover 21 to the water inlet valve of the pulsator washing machine through a water pipe as needed. When the water inlet valve port of the water inlet valve is connected to the faucet, tap water can be provided to the annular cavity 212 along the path of the water inlet valve, the water pipe and the water inlet 213, so that the nozzle 10 sprays the tap water onto the clothes in the inner tub 3 to wet the clothes.

[0053] Furthermore, those skilled in the art may also make the spray system of the present invention have the above-mentioned circulation pump 8, circulation water pipe 9, water inlet valve and water pipe connecting the water inlet valve and water inlet 213 as needed, and connect a stop valve in series between the water inlet valve and water inlet 213. In this case, the circulation pump 8 and the water inlet valve can be used as water supply equipment separately or together. When tap water is needed to spray clothes, the water inlet valve and the stop valve are opened. When the washing water in the outer barrel 2 is needed to spray clothes, the circulation pump 8 works.

[0054] Refer to the following Figures 8 to 13 The nozzle 10 of the present invention will be described in detail.

[0055] like Figures 8 to 11 As shown, the nozzle 10 includes a nozzle body 101 and a water retaining structure 102. The nozzle body 101 and the water retaining structure 102 can be fixed together by any feasible connection method, such as welding, fusion, bonding, etc. Alternatively, those skilled in the art can also make the nozzle body 101 and the water retaining structure 102 integrally formed as needed.

[0056] like Fig. 9 and Fig.11 As shown, a spray channel 1011 is provided in the nozzle body 101. When the nozzle 10 is mounted on the outer barrel cover 21, Fig.10 The lower end of the middle injection channel 1011 is connected to the annular cavity 212. The washing water in the annular cavity 212 flows through the injection channel 1011 and then flows out from the annular cavity 212. Fig.10 The upper end of the middle injection channel 1011 sprays toward the water retaining structure 102, and the water retaining structure 102 scatters the washing water and reflects it into the inner tub 3. Those skilled in the art will appreciate that the nozzle body 101 can be in any feasible shape, such as a circular column structure, a square column structure, a conical column structure, etc.

[0057] like Figures 8 to 11 As shown, the water retaining structure 102 blocks the injection channel 1011 along the axial direction of the nozzle body 101. A recess 1021 is provided on the side of the water retaining structure 102 facing the nozzle body 101. Preferably, the recess 1021 is a recess with an arc surface, that is, the inner surface of the recess 1021 is an arc surface. Further preferably, the water retaining structure 102 is a spoon-shaped structure as a whole. In addition, those skilled in the art may also set the water retaining structure 102 to any other feasible structure as needed, for example, a plate-like structure with a concave surface or a block-like structure with a concave surface.

[0058] like Fig.10As shown, after the washing water is sprayed out from the injection channel 1011, it will be sprayed into the concave portion 1021 in a beam shape. The washing water falling into the concave portion 1021 will extend from the landing point along the curved surface of the concave portion 1021, and finally flow out from the edge of the concave portion 1021 to form a fan-shaped waterfall-like water flow (such as Fig.12 and Fig.13 As shown) falls into the inner barrel 3.

[0059] Those skilled in the art will appreciate that the shape of the washing water spray can be adjusted by changing the angle of the arc-shaped concave surface in the concave portion 1021. Fig.12 The concave surface of the concave portion 1021 is a uniform spherical surface; Fig.13 The concave surface of the recessed portion 1021 is a bilaterally symmetrical non-uniform arc surface, and the concave surface is tightened toward the axis of symmetry so that the washing water can be more concentrated and sprayed as far as possible.

[0060] Those skilled in the art can also understand that, under the premise of being able to disperse the washing water sprayed from the injection channel 1011, the recess 1021 can be any feasible shape besides an arc shape, such as a U-shaped recess or a flared recess.

[0061] like Fig.14 As shown, in the second embodiment of the present invention, the nozzle body 101 of each nozzle 10 is parallel to the horizontal direction, and the angle between the extending direction of the injection port of each nozzle 10 and the horizontal direction (or vertical direction) is different. For example, Figure 6 The nozzle 10 on the left side has an angle of 34° between the extending direction of the spray port (i.e. the direction in which the washing water is sprayed) and the vertical direction; Figure 6 The nozzle 10 on the middle right side has an angle of 57° between the extending direction of the spray port (i.e. the direction in which the washing water is sprayed) and the vertical direction.

[0062] In the second embodiment, the angles between the water retaining structure 102 of each nozzle 10 and the horizontal direction (or vertical direction) are different, so that the angles between the extension direction of the injection port of each nozzle 10 and the horizontal direction (or vertical direction) are different, under the premise of ensuring that the nozzle body 101 of each nozzle 10 is arranged horizontally. For example, Fig.15a The water retaining structure 102 of the nozzle 10 shown in FIG. Fig.15a The angle between the horizontal direction and the Fig.15b The water retaining structure 102 of the nozzle 10 shown in FIG. Fig.15b The angle between the horizontal direction and the vertical direction is b, where a<b.

[0063] In addition, those skilled in the art may also divide the plurality of nozzles 10 into a plurality of groups as required, so that each group includes at least two nozzles 10. The structure of each nozzle 10 in the same group is the same. Those skilled in the art will appreciate that the plurality of nozzles 10 in the same group may be arranged adjacently or at intervals, and the number of nozzles 10 in each group may be the same or different.

[0064] In summary, in the preferred technical solution of the present invention, by providing a recess 1021 on the side of the water retaining structure 102 facing the nozzle body 101, the beam-shaped washing water sprayed from the injection channel 1011 can be evenly dispersed by the recess 1021 and flow into the inner tub 3, and the clothes in the inner tub 3 are evenly sprayed. Therefore, the nozzle 10 of the present invention can improve the spraying effect of the pulsator washing machine on the clothes in the inner tub 3, and thus optimize the washing effect of the pulsator washing machine on the clothes.

[0065] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A spray system for a pulsator washing machine, the pulsator washing machine comprising a housing, an outer tub fixedly arranged in the housing, and an inner tub rotatably arranged in the outer tub, It is characterized in that The spray system includes a water supply device and a plurality of nozzles. Each of the nozzles is disposed on the top of the outer barrel, and the water inlet of each of the nozzles is connected to the water supply device, and the jet outlet of each of the nozzles is directed toward the inner barrel. The included angles between the axis of each of the nozzles and the horizontal direction are different, so that the washing water forms a height difference in the circumferential direction of the inner tub after being sprayed by the multiple nozzles; The nozzle comprises a nozzle body and a water retaining structure fixedly connected to or integrally formed with the nozzle body, the injection port is formed between the nozzle body and the water retaining structure, and the angle between the axis of each nozzle body and the horizontal direction is different.

2. The spray system according to claim 1, characterized in that: The water retaining structure is provided with an arc-shaped recessed portion on one side facing the nozzle body, and the recessed portion is used to disperse the washing water sprayed from the nozzle body and reflect it into the inner tub.

3. The spray system according to claim 2, characterized in that: The pulsator washing machine further comprises an outer barrel cover arranged on the top of the outer barrel, and each of the nozzles is fixedly connected to or integrally formed with the outer barrel cover.

4. The spray system according to claim 3, characterized in that: All the nozzles are arranged at equal intervals along the circumference of the outer barrel.

5. The spray system according to claim 4, characterized in that: The spray system further comprises an annular cavity arranged on the outer barrel cover, and the annular cavity is respectively connected with the water supply device and each of the nozzles.

6. The spray system according to claim 5, characterized in that: The water supply device is a circulation pump, the water inlet of the circulation pump is connected to the inner cavity of the outer barrel, and the water outlet of the circulation pump is connected to the annular cavity; Alternatively, the water supply device is a water inlet valve, the water inlet valve port of the water inlet valve leads to the outside, and the water outlet valve port of the water inlet valve is connected to the annular cavity.

7. An outer drum cover of a pulsator washing machine, characterized in that: The outer barrel cover comprises a cover body and a plurality of nozzles fixedly connected to or integrally formed with the cover body. The spray port of each nozzle is directed toward the inner drum of the pulsator washing machine, and the angle between the axis of each nozzle and the horizontal direction is different, so that the washing water forms a height difference in the direction around the axis of the inner drum after being sprayed by the multiple nozzles; The nozzle comprises a nozzle body and a water retaining structure fixedly connected to or integrally formed with the nozzle body, the injection port is formed between the nozzle body and the water retaining structure, and the angle between the axis of each nozzle body and the horizontal direction is different.

8. The outer barrel cover according to claim 7, characterized in that: All the nozzles are arranged at equal intervals along the circumference of the outer barrel cover; and / or an annular cavity connected to each of the nozzles is arranged on the cover body; and / or a shielding structure for shielding the nozzles is arranged on the cover body.

9. A pulsator washing machine, characterized in that: The pulsator washing machine comprises the spray system according to any one of claims 1 to 6.

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