Sprayer structure of dish-washing machine and dish-washing machine

Abstract

The invention discloses a spray thrower structure of a dish-washing machine, which comprises a spray arm with a rotating shaft in the middle and capable of rotating around the rotating shaft; the telescopic arm is mounted at the end part of the spraying arm in an axially telescopic moving manner, and at least part of the telescopic arm is made of a magnetic attraction material which can be attracted by the magnet; the extension driving structure comprises a magnet mounted on the inner container of the dish-washing machine, and the telescopic arm is pulled to extend outwards by utilizing the magnetic driving force of the magnet; and the retraction reset structure comprises a reset elastic piece arranged between the spraying arm and the telescopic arm and is used for pulling the telescopic arm to be kept at or inwards retracted to a storage position. By means of the arrangement, the sprayer structure of the dish washing machine can attract the telescopic arm to extend outwards at a specific position through magnetic driving force, so that the effect of automatically adjusting the length of the sprayer structure is achieved; meanwhile, by means of the arrangement, magnets can be arranged at the corners of the inner container of the dish washing machine, the sprayers are driven by the magnetic attraction acting force to automatically stretch at the special positions such as the corners, and the special areas such as the corners of the inner container are effectively cleaned.

Description

Technical Field

[0001] The present invention belongs to the technical field of dishwashers, and specifically relates to a sprayer structure of a dishwasher, and more particularly to a sprayer structure capable of effectively cleaning the corners of a square inner tank of the dishwasher. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the quality of life, and thus higher and higher requirements for the quality, performance, humanization of use, intelligent operation and other aspects of daily necessities. Dishwashers have also entered people's lives as a convenient daily necessity. In principle, a dishwasher is a device that uses a nozzle to spray high-pressure washing water to wash tableware. A dishwasher generally includes a dishwasher inner tank forming a washing chamber, with a tableware input port in front of the inner tank, a door body arranged at the tableware input port, and a tableware rack, a spray device, etc. are arranged in the washing chamber.

[0003] In order to achieve a more ideal cleaning effect, the existing spray device installed in the dishwasher is generally a rotatable spray arm, a plurality of spray holes are provided on the spray arm, the spray arm is rotatably connected to the inner tank, the spray arm is connected to the water path, and the water in the water path is sprayed out through the spray holes on the spray arm to clean the tableware placed in the inner tank. In the dishwasher, the sprayer is one of the key parts of the dishwasher, which directly affects whether the tableware can be washed cleanly. The working principle of the existing dishwasher sprayer is that the spray arm performs a circular rotation around an axis, the spray arm mechanism is single, and the spraying area is limited, which affects the washing efficiency and washing area.

[0004] In addition, existing built-in dishwashers basically have square inner tanks, and the spray arms all operate in a circular trajectory. This makes it impossible to effectively clean the tableware at the four corners of the square inner tank, which has always been a problem in the industry.

[0005] Therefore, it is necessary to improve the deficiencies and defects of the prior art and provide a new type sprayer and a dishwasher with the sprayer, which has become a technical problem that needs to be solved urgently.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The object of the present invention is to provide a sprayer structure of a dishwasher and a dishwasher, so as to achieve the purpose of washing the corners of the dishwasher and effectively clean the tableware at the corners of the inner tank. Another object of the present invention is to provide a sprayer structure and a dishwasher, so as to achieve the purpose of automatically extending the sprayer when rotating to the corner position of the inner tank, so as to achieve the purpose of washing the corners of the square inner tank in a targeted manner.

[0008] To achieve the above-mentioned purpose, the present invention provides a sprayer structure of a dishwasher, which includes: a spray arm, a middle part of which has a rotating shaft and can rotate around the rotating shaft; a telescopic arm, which is installed at the end of the spray arm and can be axially telescopically moved, and is at least partially composed of a magnetic material that can be adsorbed by a magnet; an extension drive structure, including a magnet installed on the inner tank of the dishwasher, using the magnetic driving force of the magnet to pull the telescopic arm to extend outward; a retraction and reset structure, including a reset elastic member arranged between the spray arm and the telescopic arm, which is used to pull the telescopic arm to remain in, or retract inward to, a storage position.

[0009] Furthermore, the telescopic arm is a tubular structure with one end closed and the other end open; the spray arm is a tubular structure with a water channel in the middle part forming a water supply flow channel, and the end of the tubular spray arm is a double-layer structure of an inner and outer sleeve, and the open end of the telescopic arm is correspondingly inserted into the interlayer of the inner and outer sleeve double-layer structure of the spray arm.

[0010] Furthermore, at least one inner sealing ring is provided between the inner wall of the telescopic arm and the inner sleeve of the inner and outer sleeve double-layer structure of the spray arm, and at least one outer sealing ring is provided between the outer wall of the telescopic arm and the outer sleeve of the inner and outer sleeve double-layer structure of the spray arm.

[0011] Furthermore, a circle of sealing head protruding radially inward is installed at the end of the outer sleeve of the spray arm, and the outer sealing ring is mounted on the outer wall of the telescopic arm. The inner radial dimension of the sealing head is smaller than the outer radial dimension of the outer sealing ring; the inner wall of the telescopic arm is provided with a circle of radially inwardly recessed stop grooves, and there is a telescopic distance between the stop groove and the opening end of the telescopic arm. The outer wall of the inner sleeve of the spray arm is mounted with a circle of inner sealing ring protruding outward, and the outer radial dimension of the inner sealing ring is larger than the inner radial dimension of the telescopic arm and smaller than the maximum radial dimension of the stop groove.

[0012] Furthermore, the inner sealing ring is in the shape of a cone, with the small end coaxially fixed on the side of the inner sleeve away from the end, and the large end freely arranged on the side of the inner sleeve close to the end; the outer sealing ring is in the shape of a cone, with the small end coaxially fixed on the side of the telescopic arm away from the opening end, and the large end freely arranged on the side of the telescopic arm close to the opening end; preferably, the stop groove is a conical groove with an inclined bottom wall, and the depth of the stop groove on the side close to the opening end of the telescopic arm is less than the depth on the side away from the opening end of the telescopic arm.

[0013] Furthermore, the resetting elastic member is a spring extending along the axial direction of the spray arm, and both ends of the spring are fixedly connected to the telescopic arm and the spray arm respectively; when the spring is in a normal state, the telescopic arm is located in a storage position.

[0014] Furthermore, the sprayer structure includes a plurality of spray arms protruding and extending from the central rotation axis to different radial directions, and a telescopic arm is respectively provided at the end of each spray arm; each telescopic arm is respectively connected to the spray arm via a retraction and reset structure; preferably, the sprayer structure includes a main spray arm protruding and extending radially outward from the central rotation axis, and at least one branch spray arm protruding and extending laterally is provided at the end of the main spray arm, and a telescopic arm is provided at the end of each branch spray arm; each telescopic arm is respectively connected to the branch spray arm via a retraction and reset structure.

[0015] The present invention also provides a dishwasher, which comprises: an inner tank; any of the above-mentioned sprayer structures is installed in the inner tank; the spray arm extends horizontally, and the central vertical rotating shaft is located at the center of the inner tank; magnets are provided on part of the peripheral wall of the inner tank for driving the telescopic arm at the end of the spray arm to extend.

[0016] Furthermore, the horizontal cross-section of the inner tank is square; a vertical rotating shaft is provided at the center of the horizontally extending spray arm, and the vertical rotating shaft can be installed at the center of the square inner tank so as to rotate relatively around the axis; a magnet is provided at each of the four corners of the square inner tank.

[0017] Furthermore, the side length L of the square inner container is less than the axial extension length L1 of the spray arm + 2*the axial extension length L2 of the telescopic arm < the diagonal length H of the square inner container.

[0018] The present invention has at least the following beneficial effects:

[0019] Through the above-mentioned arrangement, the sprayer structure of the dishwasher can utilize magnetic driving force to attract the telescopic arm at a specific position and extend it outward, so as to achieve the effect of automatically adjusting the length of the sprayer structure; at the same time, through the above-mentioned arrangement, the dishwasher can set magnets at the corners of the inner tank, and utilize the magnetic attraction force to drive the sprayer to automatically extend at special positions such as corners, thereby achieving the effect of effectively cleaning special areas such as the corners of the inner tank.

[0020] At the same time, the invention has a simple structure, significant effects and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the structure of the sprayer structure of the dishwasher in the storage state according to an embodiment of the present invention;

[0023] Figure 2It is a schematic structural diagram of the sprayer structure of the dishwasher in an extended state according to an embodiment of the present invention;

[0024] Figure 3 and Figure 4 Schematic diagram of the structure of the dishwasher sprayer from different perspectives in an embodiment of the present invention;

[0025] Figure 5 In the embodiment of the present invention Figure 4 AA cross-sectional structure schematic diagram;

[0026] Figure 6 In the embodiment of the present invention Figure 5 A schematic diagram of the enlarged structure at B;

[0027] Figures 7 to 9 Schematic diagram of the structure of a dishwasher according to another embodiment of the present invention.

[0028] Description of the main components in the figure:

[0029] 100. Inner tank; 200. Sprayer structure; 1. Spray arm; 2. Telescopic arm; 3. Magnet; 4. Reset elastic member; 6. Water channel; 8. Telescopic water channel; 10. Rotating shaft; 11. Inner sleeve; 12. Outer sleeve; 13. Inner sealing ring; 14. Outer sealing ring; 15. Sealing head; 16. Stop groove; 40. Spring; 41. First mounting rib; 42. Second mounting rib.

[0030] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0031] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that the following embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "setting" and "connection" 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 direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0034] like Figures 1 to 9 As shown, a dishwasher is introduced in an embodiment of the present invention, and the dishwasher can be any type of dishwasher in the prior art, such as an embedded dishwasher, a sink-type dishwasher, a countertop dishwasher, etc. The dishwasher has an inner tank for placing dishes to be washed; a sprayer structure 200 is provided in the inner tank 100 of the dishwasher, and a spray hole for spraying into the inner tank is provided on the sprayer structure 200; a water channel 6 is provided inside the sprayer structure 200, and the water channel 6 is connected to the water channel structure of the dishwasher. The sprayer structure 200 can utilize the washing water flow formed by the dishwasher inlet water flow mixed with dishwashing blocks, dishwashing agents, etc. in the water channel structure of the dishwasher, and the washing water flow flows into the water channel 6 of the sprayer structure 200 after being pressurized by a pump or other structure, and then sprays into the inner tank 100 through the spray hole provided on the sprayer structure 200, so that the sprayed spray water flow washes the dishes placed in the inner tank 100. At the same time, in order to improve the washing effect of the water flow sprayed by the sprayer structure 200, a rotating shaft 10 is generally set in the middle of the sprayer structure 200, so that the sprayer structure 200 rotates around the rotating shaft 10 synchronously when spraying washing water into the inner tank 100, and the rotating force is used to spray the water flow over a larger area and with a better spraying effect to wash the dishes placed in the inner tank 100. In addition, the sprayer structure 200 can be installed on any side of the top, bottom, or side wall of the inner tank 100 in the dishwasher inner tank 100 according to needs, or at least one sprayer structure 200 can be installed on multiple sides of the inner tank 100 to further improve

[0035] like Figures 1 to 6As shown, in the embodiment of the present invention, the dishwasher sprayer structure 200 includes: a spray arm 1, a rotating shaft 10 is provided in the middle, and the spray arm 1 can be installed on the inner tank 100 of the dishwasher rotatably around the rotating shaft 10; the interior of the rotating shaft 10 is hollow, and the interior of the spray arm 1 is hollow, and the two hollow parts are connected to form a waterway 6, and are connected with the waterway structure of the dishwasher through the hollow part of the rotating shaft 10, so that the washing water flow of the dishwasher can be introduced into the hollow part of the spray arm 1 through the rotating shaft 10, so as to realize that the washing water of the dishwasher flows into the waterway 6 of the sprayer structure 200, and the waterway 6 is connected with a plurality of spray holes provided on the surface of the spray arm 1, so as to guide the washing water flow through the waterway 6 and transport it to the spray arm 1 to the inner tank 100. The telescopic arm 2 is axially telescopically movable and installed at the end of the spray arm 1, and is at least partially composed of a magnetic material that can be adsorbed by the magnet 3; the interior of the telescopic arm 2 is also hollow and constitutes a telescopic waterway 8, and the telescopic waterway 8 constituted by the telescopic arm 2 is connected to the waterway 6 constituted by the spray arm 1, so that the washing water of the dishwasher can flow into the telescopic waterway 8 after being introduced into the waterway 6; at the same time, a spray hole is also provided on the telescopic arm 2, so that the washing water led to the telescopic arm 2 by the dishwasher can be sprayed into the inner tank 100 from the spray hole provided on the telescopic arm 2, and the coverage area of ​​the spray water flow is extended by using the extended telescopic arm 2, so as to achieve the effect of thoroughly cleaning the corners of the inner tank 100.

[0036] like Figures 1 to 6 As shown, the dishwasher sprayer structure 200 also includes: an extension drive structure, including a magnet 3 installed on the dishwasher inner tank 100, and using the magnetic driving force of the magnet 3 to pull the telescopic arm 2 made of magnetic material to extend outward; preferably, the telescopic arm 2 is entirely made of magnetic material, such as iron; in order to improve the smoothness of the telescopic arm 2 extending outward, the spray arm 1 is generally set to a non-magnetic material to avoid the magnetism on the telescopic arm 2 being transmitted and diffused to weaken the magnetic driving force on the telescopic arm 2, for example: the spray arm 1 is set to a plastic part.

[0037] Through the above-mentioned arrangement, the sprayer structure of the dishwasher can utilize magnetic driving force to attract the telescopic arm at a specific position and extend it outward, so as to achieve the effect of automatically adjusting the length of the sprayer structure; at the same time, through the above-mentioned arrangement, the dishwasher can set magnets at the corners of the inner tank, and utilize the magnetic attraction force to drive the sprayer to automatically extend at special positions such as corners, thereby achieving the effect of effectively cleaning special areas such as the corners of the inner tank.

[0038] like Figure 5 and Figure 6As shown, the dishwasher sprayer structure 200 also includes: a retraction and reset structure, including a reset elastic member 4 disposed between the spray arm 1 and the telescopic arm 2, which is used to pull the telescopic arm 2 to remain at, or retract inward to, the storage position, so as to use the retraction and reset structure to provide a reset force to the telescopic arm 2 in real time, pull the telescopic arm 2 to remain at the storage position, or drive the extended telescopic arm 2 to retract and move to the storage position. Thus, it is avoided that the telescopic arm 2 can be kept at the storage position at a non-corner position of the inner tank 100, and it is effectively prevented that the telescopic arm 2 is extended too long and interferes with the inner tank 100 and cannot rotate smoothly.

[0039] In the embodiment of the present invention, the telescopic arm 2 is a tubular structure with one end closed and the other end open; the spray arm 1 is a tubular structure with a water channel 6 constituting a water supply flow channel in the middle part thereof, and the end of the tubular spray arm 1 is an inner and outer sleeve double-layer structure, and the open end of the telescopic arm 2 is correspondingly inserted into the interlayer of the inner and outer sleeve double-layer structure of the spray arm 1, so that the water channel 6 inside the spray arm 1 is connected with the telescopic water channel 8 inside the telescopic arm through the inner sleeve of the inner and outer sleeve double-layer structure, so as to ensure that part of the washing water can smoothly flow into the telescopic arm 2 and be sprayed outward from the spray hole opened on the telescopic arm 2.

[0040] In the embodiment of the present invention, the inner and outer sleeve double-layer structure provided at the end of the tubular spray arm 1 is divided into a coaxially provided inner sleeve 11 and an outer sleeve 12, the outer circumferential radial dimension of the inner sleeve 11 is smaller than the inner circumferential radial dimension of the outer sleeve 12, and the difference is greater than the thickness of the end of the telescopic arm 2, so that the telescopic arm 2 can be smoothly inserted into the gap between the inner and outer sleeves. At least one inner sealing ring 13 is provided between the inner wall of the telescopic arm 2 and the inner sleeve 11 of the inner and outer sleeve double-layer structure of the spray arm 1, and at least one outer sealing ring 14 is provided between the outer wall of the telescopic arm 2 and the outer sleeve 12 of the inner and outer sleeve double-layer structure of the spray arm 1, so as to use two layers of sealing rings to reliably seal the connection position of the spray arm 1 and the telescopic arm 2, and prevent the occurrence of leakage of washing water from the connection.

[0041] In the embodiment of the present invention, a circle of sealing head 15 protruding radially inward is installed at the end of the outer sleeve of the spray arm 1, and the outer sealing ring 14 is mounted on the outer wall of the telescopic arm 2, and the inner radial dimension of the sealing head 15 is smaller than the outer radial dimension of the outer sealing ring 14; the inner wall of the telescopic arm 2 is provided with a circle of radially inwardly recessed stop grooves 16, and there is a telescopic distance between the stop groove 16 and the open end of the telescopic arm 2, and the outer wall of the inner sleeve 11 of the spray arm 1 is mounted with a circle of inner sealing ring 13 protruding outward, and the outer radial dimension of the inner sealing ring 13 is larger than the inner radial dimension of the telescopic arm 2 and smaller than the maximum radial dimension of the stop groove 16.

[0042] By installing a plugging head at the end of the spray arm, the plugging head can be used to stop the outer sealing ring on the telescopic arm, thereby blocking the telescopic arm from extending outward, preventing the telescopic arm from extending too long and falling off, and effectively improving the stability of the use of the telescopic arm. In addition, a stop groove is provided on the telescopic arm to match the inner sealing ring installed on the spray arm, so that when the telescopic arm is retracted to the storage position, the inner sealing ring on the telescopic arm is inserted into the stop groove accordingly, so as to achieve the effect of positioning and fixing the telescopic arm when it is moved to the storage position.

[0043] In the embodiment of the present invention, the inner sealing ring 13 is in the shape of a cone, with a small end coaxially fixed on the side of the inner sleeve 11 away from the end of the spray arm 1, and a large end freely arranged on the side of the inner sleeve 11 close to the end of the spray arm 1; the outer sealing ring 14 is in the shape of a cone, with a small end coaxially fixed on the side of the telescopic arm 2 away from the open end, and a large end freely arranged on the side of the telescopic arm 2 close to the open end; preferably, the stop groove 16 is a conical groove with an inclined bottom wall, and the depth of the stop groove 16 close to the open end of the telescopic arm 2 is less than the depth of the side away from the open end of the telescopic arm 2. By providing the above-mentioned one circle of conical groove-shaped stop grooves 16 on the telescopic arm 2, the inner sealing ring 13 on the spray arm 1 is guided by the inclined bottom surface of the conical groove, so that the telescopic arm 2 can be disengaged by the inclined surface when it is extended outward, and can be stopped by the inclined surface when it is retracted inward, so that the above-mentioned conical inclined surface constitutes a one-way stop structure to prevent the telescopic arm 2 from retracting and moving inward in one direction.

[0044] In the embodiment of the present invention, the resetting elastic member 4 is a spring 40 extending along the axial direction of the spray arm, and the two ends of the spring are fixedly connected to the telescopic arm 2 and the spray arm 1 respectively; when the spring 40 is in a normal state, the telescopic arm 2 is in the storage position. At the same time, when the telescopic arm 2 is in the storage position, the inner sealing ring 13 on the spray arm 1 is correspondingly inserted into the stop groove 16 on the telescopic arm 2 to realize the locking and positioning of the telescopic arm 2 in the storage position. Preferably, the outer wall of the telescopic arm 2 is provided with a first mounting rib 41 protruding to one side, and the outer wall of the spray arm 1 is provided with a second mounting rib 42 protruding to the same side, and a spring 40 extending horizontally and extending along the horizontal axial direction of the spray arm 1 is provided between the first mounting rib 41 and the second mounting rib 42, and the two ends of the spring 40 are fixedly connected to the first mounting rib 41 and the second mounting rib 42 respectively. Further preferably, the first mounting rib 41, the second mounting rib 42 and the spring 40 are all located on the side of the spray arm 1 provided with the rotating shaft 10, and the protruding heights of the first mounting rib 41 and the second mounting rib 42 are less than the protruding height of the rotating shaft 10.

[0045] In the embodiment of the present invention, the sprayer structure 200 includes a plurality of spray arms 1 extending from a central rotation axis 10 in different radial directions, and each end of each spray arm 1 is provided with a telescopic arm 2; each telescopic arm 2 is connected to the spray arm 1 via a retractable reset structure; for example:

[0046] like Figure 1 and Figure 2 As shown, a spray arm 1 is horizontally extended in two radial directions at the central rotation axis 10, and a telescopic arm 2 is provided at the extended end of each of the two spray arms 1; the two telescopic arms 2 are respectively connected to the spray arm 1 via a retractable reset structure to ensure that the telescopic arms 2 are in a storage position under normal conditions. Preferably, the telescopic arms 2 at both ends of the spray arm 1 have the same structure, are symmetrically arranged relative to the center of the spray arm 1, and are respectively connected to the spray arm 1 via their corresponding reset elastic members 4.

[0047] You can also Figure 7 As shown, a spray arm 1 is horizontally extended from the central rotation axis 10 to three radial directions arranged at equal intervals, and a telescopic arm 2 is provided at each extended end of the three spray arms 1;

[0048] You can also Figure 8 As shown, a spray arm 1 is horizontally extended from the central rotating shaft 10 to four radial directions arranged at equal intervals, and a telescopic arm 2 is provided at each extended end of the four spray arms 1;

[0049] Of course, in the embodiment of the present invention, a spray arm 1 may be provided in each of a plurality of radial directions, and a telescopic arm 2 may be installed at the end of each spray arm 1 .

[0050] At the same time, in the embodiment of the present invention, Fig. 9 As shown, the sprayer structure 200 may also include a main spray arm radially extending outward from the central rotation axis 10, and at least one branch spray arm protruding and extending laterally is provided at the end of the main spray arm; each branch spray arm can be used as a spray arm 1, and a telescopic arm 2 is added at the end of each branch spray arm; each telescopic arm 2 is connected to the branch spray arm through a retractable reset structure to achieve the effect of radially extending the sprayer structure. Of course, it is also possible to adopt a solution of adding a secondary branch spray arm, a tertiary branch spray arm, etc. to the branch spray arm.

[0051] like Figures 1 to 6As shown, the embodiment of the present invention also introduces a dishwasher, which includes: an inner tank 100; any of the above-mentioned sprayer structures 200 is installed in the inner tank 100; the spray arm 1 extends horizontally, and the central vertical rotating shaft 10 is located at the center of the inner tank 100; a magnet 3 is provided on part of the peripheral wall of the inner tank 100, which is used to drive the telescopic arm 2 at the end of the spray arm 1 to extend. By installing the magnet 3 on the peripheral wall of the inner tank 100 of the dishwasher, when the spray arm 1 rotates around the axis to a corresponding position close to the magnet 3, the telescopic arm 2 at the end of the spray arm 1 can extend outward under the adsorption of the magnet 3, so that the axial length of the sprayer structure 200 is extended, so as to cover and wash a specific position in the inner tank 100, strengthen the cleaning, and thus improve the cleaning effect of the tableware in the dishwasher.

[0052] In the embodiment of the present invention, the horizontal cross section of the inner tank 100 of the dishwasher is square; a vertical rotating shaft 10 is provided at the center of the horizontally extending spray arm 1, and the vertical rotating shaft 10 is relatively rotatable and installed at the center of the square inner tank 100; a magnet 3 is provided at each of the four corners of the square inner tank 100. Of course, the sprayer structure 200 in the present application can also be installed on a vertical side wall of the square inner tank 100, and magnets 3 are respectively installed at the four corners of the corresponding side wall, which can also achieve the effect of enhancing the washing effect of the corner area of ​​the square side wall of the inner tank.

[0053] In the embodiment of the present invention, the side length L of the square inner liner 100 is less than the axial extension length L1 of the spray arm 1 + 2* the axial extension length L2 of the telescopic arm 2 < the diagonal length H of the square inner liner 100, so that the telescopic arm 2 does not contact the side wall of the square inner liner 100 when it is in the storage position, avoiding the occurrence of interference with the side wall of the inner liner 100 during the rotation of the sprayer structure 200. At the same time, when the spray arm 1 rotates to the diagonal position of the square inner liner 100, the magnet 3 provided at the corresponding position can be used to magnetically adsorb the telescopic arm 2 at the end of the spray arm 1, so that the telescopic arm 2 extends outward and the corner area of ​​the inner liner 100 is extended to wash. In addition, when the spray arm 1 rotates past the diagonal position of the inner liner, the adsorption effect of the magnet 3 disappears, and the telescopic arm 2 can be retracted to the storage position under the pulling force of the reset elastic member 4, so that the telescopic arm 2 will not interfere with the side wall of the inner liner 100, avoiding the occurrence of the spray arm 1 being stuck and unable to continue rotating.

[0054] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A sprayer structure of a dishwasher, comprising: The spray arm has a rotating shaft in the middle and can rotate around the rotating shaft; Features: A telescopic arm is axially telescopically mounted on the end of the spray arm and is at least partially made of a magnetic material that can be attracted by a magnet; The extension drive structure includes a magnet installed on the inner tank of the dishwasher, and uses the magnetic driving force of the magnet to pull the telescopic arm outward; The retraction and reset structure comprises a reset elastic member arranged between the spray arm and the telescopic arm, and is used for pulling the telescopic arm to remain at, or retract inwardly to, a storage position.

2. A sprayer structure for a dishwasher according to claim 1, characterized in that: The telescopic arm is a cylindrical structure with one end closed and the other end open; The spray arm is a tubular structure with a water channel in the middle forming a water supply flow channel. The end of the tubular spray arm is an inner and outer sleeve double-layer structure, and the open end of the telescopic arm is correspondingly inserted into the interlayer of the inner and outer sleeve double-layer structure of the spray arm.

3. The sprayer structure of a dishwasher according to claim 2, characterized in that: At least one inner sealing ring is provided between the inner wall of the telescopic arm and the inner sleeve of the spray arm's inner and outer sleeve double-layer structure, and at least one outer sealing ring is provided between the outer wall of the telescopic arm and the outer sleeve of the spray arm's inner and outer sleeve double-layer structure.

4. A sprayer structure for a dishwasher according to claim 3, characterized in that: A sealing head protruding radially inward is installed at the end of the outer sleeve of the spray arm. The outer sealing ring is sleeved on the outer wall of the telescopic arm. The inner radial dimension of the sealing head is smaller than the outer radial dimension of the outer sealing ring. The inner wall of the telescopic arm is provided with a circle of radially inwardly recessed stop grooves, and there is a telescopic distance between the stop groove and the opening end of the telescopic arm. The outer wall of the inner sleeve of the spray arm is provided with a circle of outwardly protruding inner sealing rings, and the outer circumferential radial dimension of the inner sealing ring is larger than the inner circumferential radial dimension of the telescopic arm and smaller than the maximum radial dimension of the stop groove.

5. The sprayer structure of a dishwasher according to claim 4, characterized in that: The inner sealing ring is in the shape of a cone, with the small end coaxially fixed on the side of the inner sleeve away from the end, and the large end freely arranged on the side of the inner sleeve close to the end; The outer sealing ring is in the shape of a cone, with the small end coaxially fixed on the side of the telescopic arm away from the opening end, and the large end freely arranged on the side of the telescopic arm close to the opening end; Preferably, the stop groove is a conical groove with an inclined bottom wall, and the depth of the stop groove on the side close to the opening end of the telescopic arm is smaller than the depth on the side away from the opening end of the telescopic arm.

6. A sprayer structure for a dishwasher according to any one of claims 1 to 5, characterized in that: The resetting elastic member is a spring extending along the axial direction of the spray arm, and both ends of the spring are fixedly connected to the telescopic arm and the spray arm respectively; when the spring is in a normal state, the telescopic arm is located in a storage position.

7. A sprayer structure for a dishwasher according to any one of claims 1 to 6, characterized in that: The sprayer structure includes a plurality of spray arms extending from the central rotating shaft to different radial directions, each spray arm is provided with a telescopic arm at the end thereof; each telescopic arm is connected to the spray arm via a retractable reset structure; Preferably, the sprayer structure includes a main spray arm that protrudes radially outward from the central rotation axis, the end of the main spray arm is provided with at least one branch spray arm that protrudes laterally, and the end of each branch spray arm is provided with a telescopic arm; each telescopic arm is connected to the branch spray arm via a retraction and reset structure.

8. A dishwasher, comprising: Liner; Features: The inner tank is installed with a sprayer structure as described in any one of claims 1 to 7; The spray arm extends horizontally, with the central vertical axis located in the center of the inner tank; Part of the peripheral wall of the inner tank is provided with a magnet for driving the telescopic arm at the end of the spray arm to extend.

9. A dishwasher according to claim 8, characterized in that: The horizontal cross section of the liner is square; A vertical rotating shaft is arranged at the center of the horizontally extending spray arm, and the vertical rotating shaft is relatively rotatable and installed at the center of the square inner tank; A magnet is arranged at each of the four corners of the square inner container.

10. A dishwasher according to claim 9, characterized in that: The side length L of the square inner tank is less than the axial extension length L1 of the spray arm + 2* the axial extension length L2 of the telescopic arm < the diagonal length H of the square inner tank.

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