Spraying device of dish washing machine and dish washing machine

Abstract

The spraying device of the dish washing machine is internally provided with an installation cavity, and the installation cavity is communicated with a water inlet channel and at least two sets of spraying channels; the spraying device comprises a valve core which is arranged in the mounting cavity and can do reciprocating motion in the axial direction; the guide structure is arranged on the cavity wall of the mounting cavity and used for converting the axial relative movement action of the valve element into the action that the valve element rotates around a shaft; and the valve core rotates to switch and communicate the water inlet channel with each group of spraying channels. The spraying device has the beneficial effects that in the axial movement process of the valve element, the valve element is matched with the guide structure, so that the valve element rotates around the shaft while moving in the axial direction, switching communication between the water inlet channel and the different sets of spraying channels is achieved, the spraying direction of the spraying device is changed, and therefore the problems that an existing spraying device is single in spraying water flow form and poor in spraying effect are solved. The spraying device can comprehensively flush tableware in the dish washing machine.

Description

Technical Field

[0001] This invention belongs to the field of tableware cleaning, and more specifically, relates to a spray device for a dishwasher and a dishwasher. Background Technology

[0002] With social development and the continuous improvement of people's living standards, dishwashers, as a type of household appliance that automatically cleans tableware such as bowls, chopsticks, plates, dishes, knives, and forks, are gradually attracting more and more attention from families, providing convenience for users.

[0003] Dishwashers are generally equipped with an inner tub for holding dishes to be washed. The bottom wall of the inner tub is usually equipped with a rotating spray assembly. Some dishwashers also have rotating spray assemblies on the side walls and / or top walls of the inner tub. When the spray assembly sprays water, the reaction force of the water drives the spray arm to rotate, and then sprays water to various parts of the inner tub through the spray arm to achieve the purpose of cleaning the dishes.

[0004] However, in existing technologies, the spray arm can generally only rotate in one direction, and the rinsing position is basically the same each time. This results in some dead corners of the dishes not being effectively rinsed by the spray water, leading to an unsatisfactory overall cleaning effect of the dishwasher.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a spray device and dishwasher for a dishwasher. During the axial movement of the valve core, through cooperation with the guide structure, the valve core rotates around the axis while moving axially, realizing the switching and connection between the water inlet channel and different groups of spray channels, changing the spray direction of the spray device, thereby solving the problem that the existing spray device has a single spray water flow pattern and cannot thoroughly rinse the tableware.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: a spray device for a dishwasher, having an internal mounting cavity, the mounting cavity being connected to a water inlet channel and at least two sets of spray channels; the spray device includes a valve core disposed in the mounting cavity, the valve core being capable of axial reciprocating motion; a guide structure disposed on the chamber wall of the mounting cavity, used to convert the axial relative motion of the valve core into the motion of the valve core rotating around an axis; the rotation of the valve core switches the connection between the water inlet channel and each set of spray channels.

[0008] Furthermore, after one cycle of reciprocating motion, the valve core rotates around its axis by a first angle, switching the water inlet channel connected to one set of spray channels to connect with another set of spray channels.

[0009] Furthermore, the reciprocating motion of the valve core includes a first stroke of movement along an axial direction and a second stroke of movement in the opposite direction; the guide structure includes a first guide structure and a second guide structure. In the first stroke, the first guide structure guides the axially moving valve core to rotate around the axis by a second angle; in the second stroke, the second guide structure guides the axially moving valve core to rotate around the axis by a third angle; the sum of the second angle and the third angle is equal to the first angle.

[0010] Furthermore, the guide structure has a slide rail, which includes at least a spiral slide rail section extending around the axis; the valve core is provided with a guide structure, which is in dynamic contact with the slide rail.

[0011] Furthermore, the guide structure has a guide surface facing the axial side of the mounting cavity, and the guide surface forms a slide.

[0012] Preferably, the guide structure and the guide structure have separable dynamic contact.

[0013] Furthermore, the guiding structure includes a first guiding structure and a second guiding structure spaced a distance apart in the axial direction, and slides are respectively provided on the opposite side end faces of the first guiding structure and the second guiding structure; during the axial reciprocating motion of the valve core, the guiding structure reciprocates between the first guiding structure and the second guiding structure.

[0014] Preferably, the spiral slide section includes a first slide disposed on the first guide structure and a second slide disposed on the second guide structure;

[0015] More preferably, the spiral extension directions of the first and second slides are opposite;

[0016] In another preferred embodiment, multiple first and second guide structures are arranged around the axis of the valve core.

[0017] Furthermore, the valve core is equipped with an actuating structure, which, under the impact of water flow, drives the valve core to move in one axial direction.

[0018] Preferably, the valve core's axis extends vertically, and the valve core is located in the lower half of the mounting cavity under the action of gravity; when water enters the spray device, the water flow impacts the actuating structure, causing the valve core to move upward.

[0019] In another preferred embodiment, the actuating structure is disposed on one end face of the valve core, and there is a space between the actuating structure and the end face of the mounting cavity on the same side, which communicates with the water inlet channel.

[0020] Furthermore, the valve core is equipped with a sealing part. When the valve core rotates, the sealing part can selectively seal one set of spray channels, switching the water inlet channel to another set of spray channels.

[0021] Furthermore, the spraying device is equipped with a flow guiding structure, and the flow guiding structure forms a flow guiding channel that corresponds to and is connected to each spraying channel. The water inlet of each flow guiding channel is connected to the water inlet channel through the installation cavity; the valve core rotates to drive each sealing part to selectively seal the water inlet of the flow guiding channel.

[0022] Preferably, the flow guiding structure extends radially inward along the mounting cavity, and the flow guiding structure and one end chamber wall of the mounting cavity are spaced apart axially to form an active space, and the inlet of the flow guiding channel is connected to the active space;

[0023] In a further preferred embodiment, the sealing portion extends outward from the outer peripheral wall of the valve core, and the extended end of the sealing portion extends into the active space;

[0024] More preferably, a guide groove that is recessed inward is provided on the side of the sealing part that is farther away from the flow guiding structure, and each guide groove extends spirally around the axis of the valve core.

[0025] A dishwasher employing the spray device of a dishwasher as described above.

[0026] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: during the axial movement of the valve core, through cooperation with the guide structure, the valve core rotates around the axis while moving axially, realizing the switching and connection between the water inlet channel and different groups of spray channels, changing the spray direction of the spray device, thereby solving the problem of the single spray water flow pattern of the existing spray device, and enabling the spray device to thoroughly rinse the tableware in the dishwasher.

[0027] At the same time, the present invention has a simple structure, significant effects, and is suitable for widespread use.

[0028] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0030] Figure 1 This is a schematic diagram of the spray device structure according to an embodiment of the present invention;

[0031] Figure 2 This is an exploded view of the spray device structure from a certain perspective according to an embodiment of the present invention;

[0032] Figure 3This is an exploded view of the spray device structure from another perspective of an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the main structure of an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the valve core structure from a certain perspective of an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the valve core structure from another perspective of an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the water distribution cover according to an embodiment of the present invention;

[0037] Figure 8 This is a cross-sectional schematic diagram of a certain position of the spray device in an embodiment of the present invention when it stops working;

[0038] Figure 9 This is an embodiment of the present invention. Figure 8 A magnified view of a portion of region A;

[0039] Figure 10 This is a cross-sectional schematic diagram of a certain position of the spray device in an embodiment of the present invention when water is flowing through it;

[0040] Figure 11 This is an embodiment of the present invention. Figure 10 A magnified view of a portion of region B.

[0041] In the diagram: 1. Spraying device; 101. Main body; 102. Water distribution cover; 103. Spraying arm; 110. Spraying channel; 111. First spraying channel; 112. Second spraying channel; 120. Water inlet channel; 130. Mounting cavity; 131. Upper chamber; 132. Lower chamber; 140. Guiding structure; 141. First guiding structure; 142. Second guiding structure; 150. Slide rail; 151. First slide rail; 152. Second slide rail; 160. Limiting structure; 170. Flow guiding structure; 180. Pressure relief hole; 2. Valve core; 210. Guiding structure; 211. First guiding structure; 212. Second guiding structure; 220. Action structure; 230. Water guiding channel; 240. Sealing part; 241. Guide groove; 250. First sealing rib.

[0042] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] like Figure 1-11 As shown in the embodiment of the present invention, a spray device 1 for a dishwasher is introduced, which has an internal mounting cavity 130. The mounting cavity 130 is connected to a water inlet channel 120 and at least two sets of spray channels 110. The spray device 1 includes a valve core 2, which is disposed in the mounting cavity 130 and can reciprocate axially. A guide structure 140 is disposed on the chamber wall of the mounting cavity 130 and is used to convert the axial relative movement of the valve core 2 into the rotation of the valve core 2 around the axis. The rotation of the valve core 2 switches the connection between the water inlet channel 120 and each set of spray channels 110.

[0047] With the above settings, the valve core 2 rotates around the axis while moving axially, in cooperation with the guide structure 140, so that the water inlet channel 120 can switch and connect with different groups of spray channels 110, thereby changing the spray direction of the spray device 1. This solves the problem of the single spray flow pattern of the existing spray device 1, and enables the spray device 1 to thoroughly rinse the dishes in the dishwasher.

[0048] In one embodiment of the present invention, when the valve core 2 moves along one axial direction, the valve core 2 rotates circumferentially under the guidance of the guide structure 140, switching the water inlet channel 120 connected to one set of spray channels 110 to another set of spray channels 110; when the valve core 2 moves along the opposite axial direction, the valve core 2 rotates circumferentially in the opposite direction under the guidance of the guide structure 140, switching the water inlet channel 120 to the initially connected spray channel 110; so that the valve core 2 can switch the water inlet channel 120 to each set of spray channels 110 by rotating in both directions during the axial reciprocating motion.

[0049] In another preferred embodiment of the present invention, after the valve core 2 completes one cycle of reciprocating motion, the valve core 2 rotates around its axis by a first angle, switching the water inlet channel 120 connected to one set of spray channels 110 to be connected to another set of spray channels 110. This ensures that the valve core 2 rotates in the same circumferential direction under the action of the guide structure 140 during each cycle of axial reciprocating motion, thereby achieving the switching connection between the water inlet channel 120 and each set of spray channels 110. Compared with the previous embodiment, the rotation direction of the valve core 2 remains unchanged, making the operation of the valve core 2 more stable and preventing the valve core 2 from getting stuck during rotation.

[0050] In an alternative embodiment of the present invention, the reciprocating motion of the valve core 2 includes a first stroke of axial movement and a second stroke of reverse movement; in the first stroke or the second stroke, the guide structure 140 guides the axially moving valve core 2 to rotate by a first angle; in the second stroke or the first stroke, the valve core 2 only performs movement parallel to the axis.

[0051] In embodiments of the present invention, the reciprocating motion of the valve core 2 includes a first stroke of axial movement and a second stroke of reverse movement; the guide structure 140 includes a first guide structure 141 and a second guide structure 142. In the first stroke, the first guide structure 141 guides the axially moving valve core 2 to rotate around the axis by a second angle; in the second stroke, the second guide structure 142 guides the axially moving valve core 2 to rotate around the axis by a third angle; the sum of the second angle and the third angle is equal to the first angle.

[0052] With the above settings, the valve core 2 rotates around the axis in the first stroke and the second stroke respectively, and the rotation angle of the two strokes is smaller than the first angle. This makes the rotation amplitude of the valve core 2 smaller in the two strokes, and the rotation angle of each stroke is less likely to have errors, thereby improving the rotation accuracy and realizing the precise switching between the water inlet channel 120 and different groups of spray channels 110.

[0053] In an embodiment of the present invention, a spirally extending slide 150 is formed on the guide structure 140, and a guide structure 210 is provided on the valve core 2, with the guide structure 210 in dynamic contact with the slide 150.

[0054] With the above configuration, by setting the spiral slide 150, the valve core 2, which moves along the axis, is rotated around the axis by the guide structure 210 and the slide 150, thereby realizing complex motion conversion in a limited space and helping to reduce the overall volume of the spray device 1.

[0055] In one embodiment of the present invention, the guide structure 140 is an annular third guide structure, which is sleeved on the periphery of the valve core 2. The slide 150 includes a spiral third slide groove disposed on the inner annular sidewall of the guide structure 140. Each third slide groove is arranged circumferentially along the inner annular sidewall. A guide channel is disposed between the third slides 150. The end of each third slide 150 is connected to the starting end of another third slide 150 through the guide channel, so that the third slides 150 and the guide channel cooperate to form a closed track. The guide structure 210 is disposed on the periphery of the valve core 2, and the extension end of the guide structure 210 is movably disposed in the track.

[0056] In another preferred embodiment of the present invention, the guide structure 140 has a guide surface facing the axial side of the mounting cavity 130, and the guide surface forms a slide 150; by setting one side surface of the guide structure 140 as a slide 150, the guide structure 210 overlaps on the side surface of the guide structure 140, which facilitates the assembly between the valve core 2 and the spray device 1.

[0057] In the embodiments of the present invention, the guide structure 210 and the slide 150 of the guide structure 140 are in separable dynamic contact; so that the axial length of the slide 150 of the guide structure 140 is less than the maximum axial movement length of the valve core 2, thereby reducing the space occupied by the guide structure 140 and facilitating the assembly of the spray device 1.

[0058] In an embodiment of the present invention, the guide structure 140 includes a first guide structure 141 and a second guide structure 142 arranged axially at a distance from each other. The opposite end faces of the first guide structure 141 and the second guide structure 142 are respectively provided with slide rails 150. During the axial reciprocating motion of the valve core 2, the guide structure 210 reciprocates between the first guide structure 141 and the second guide structure 142. This allows the first guide structure 141 and the second guide structure 142 to limit the guide structure 210, so that while guiding the valve core 2 to rotate, the first guide structure 141 and the second guide structure 142 can also prevent the valve core 2 from disengaging.

[0059] In an embodiment of the present invention, the spray device 1 includes a main body 101 and a water distribution cover 102 fastened to an opening on one side of the main body 101. The main body 101 and the water distribution cover 102 cooperate to form an installation cavity 130, and the water distribution cover 102 constitutes the chamber wall of one axial end of the installation cavity 130. Preferably, the main body 101 is provided with a water inlet channel 120 and a spray channel 110.

[0060] In an embodiment of the present invention, a first guide structure 141 is disposed on a water distribution cover 102, and a second guide structure 142 is disposed on a main body 101.

[0061] In an embodiment of the present invention, during the installation process, the valve core 2 is first installed into the main body 101 through the opening of the main body 101; then the water distribution cover 102 is fastened onto the main body 101; thus completing the installation of the valve core 2 into the spray device 1; the installation is convenient and the operation is reliable.

[0062] In an embodiment of the present invention, the spiral slide section includes a first slide 151 disposed on the first guide structure 141 and a second slide 152 disposed on the second guide structure 142; so that by setting two spiral slide sections, the valve core 2 can be turned in the first stroke and the second stroke of the reciprocating motion respectively, thereby realizing the switching connection between the water inlet channel 120 and different groups of spray channels 110.

[0063] In embodiments of the present invention, the spiral extension directions of the first slide rail 151 and the second slide rail 152 are opposite. By making the spiral extension directions of the first slide rail 151 and the second slide rail 152 opposite, the valve core 2 moves along an axial direction and rotates in a circumferential direction through the first guide structure 141. When the valve core 2 moves in the opposite direction, since the spiral extension directions of the second slide rail 152 of the second guide structure 142 are opposite, the valve core 2 rotates in the same circumferential direction around the axial direction through the second guide structure 142, thereby enabling the valve core 2 to continuously rotate in the same circumferential direction during the reciprocating motion along the axial direction.

[0064] In embodiments of the present invention, a plurality of first guide structures 141 and second guide structures 142 are arranged around the axis of valve core 2.

[0065] In embodiments of the present invention, the guide structure 210 includes a first guide structure 211 that cooperates with the first guide structure 141, and a second guide structure 212 that cooperates with the second guide structure 142.

[0066] In an embodiment of the present invention, the movement process of the valve core 2 during the operation of the spray device is as follows:

[0067] Before the reciprocating motion cycle begins, when the water inlet channel 120 is connected to a set of spray channels 110, the second guide structure 212 of the valve core 2 contacts the second slide 152 of the second guide structure 142. The first guide structure 211 of the valve core 2 and the corresponding first guide structure 141 are spaced apart in the axial direction, and the projection of the first guide structure 211 in the axial direction coincides with the part around the starting end of the first slide 151 of the corresponding first guide structure 211.

[0068] During the first stroke, the valve core 2 separates from the second guide structure 212 and the second slide 152, and the first guide structure 211 contacts the area around the starting end of the first slide 151 and slides along the first slide 151, causing the valve core 2 to rotate circumferentially by a second angle to complete the first stroke.

[0069] After the first stroke is completed, the axial projection of the second guide structure 212 coincides with the area around the starting end of the other second slide rail 152;

[0070] During the second stroke, the valve core 2 separates from the first guide structure 211 and the first slide 151, and the second guide structure 212 contacts the second slide 152 of another second guide structure 142 and rotates along the second slide 152 at a third angle to complete the second stroke. The water inlet channel 120 is switched to connect with another set of spray channels 110.

[0071] In an embodiment of the present invention, the guide structure 210 is provided with a guide surface facing the slide 150, and the guide surface is arranged parallel to the corresponding slide 150. By providing a guide surface parallel to the slide 150, the guide surface and the guide surface constituting the slide 150 are dynamically contacted during the movement of the valve core 2, thereby improving the stability of the rotation of the valve core 2.

[0072] In an embodiment of the present invention, when the water inlet channel 120 is connected to a set of spray channels 110, the portion around the starting end of the first guide surface of the first guide structure 211 coincides with the portion around the starting end of the first slide 151 in the axial direction.

[0073] During the first stroke, the valve core 2 has a portion around the starting end of the first guide surface in contact with a portion around the starting end of the first slide 151. The starting end of the first guide surface slides along the first slide 151 to the end of the first slide 151, thus completing the first stroke.

[0074] After the first stroke is completed, the axial projection of the surrounding portion of the starting end of the second guide surface of the second guide structure 212 coincides with the surrounding portion of the starting end of the other second slide rail 152.

[0075] During the second stroke, the valve core 2 has a portion around the starting end of the second guide surface in contact with the starting end of the second slide 152 of another second guide structure 142. The starting end of the second guide surface slides along the second slide 152 to the end of the second slide 152, completing the second stroke.

[0076] In embodiments of the present invention, the guide structure 140 is provided to protrude from the periphery of the mounting cavity 130 or from the axial end of the mounting cavity 130.

[0077] In a specific embodiment of the present invention, the first guide structure 141 is arranged on the water distribution cover 102, and the second guide structure 142 protrudes from the cavity wall around the mounting cavity 130; preferably, the second guide structure 142 is arranged at the end farther away from the water distribution cover 102.

[0078] In one embodiment of the present invention, the valve core 2 is provided with a ferromagnetic magnetic moving part, and the spray device 1 is provided with an electromagnet assembly. The electromagnet is located on the axial side of the mounting cavity 130. By controlling the electromagnetic assembly to operate in a set manner, the magnetic moving part drives the valve core 2 to reciprocate axially. Preferably, the magnetic moving part is a magnet with magnetic poles. By adjusting the polarity of the magnetic poles on the side of the electromagnetic assembly closer to the magnetic moving part, the magnetic moving part moves closer to or further away from the electromagnetic assembly. In another preferred embodiment, the axis of the mounting cavity 130 is vertically arranged, and the electromagnetic assembly is located above the mounting cavity 130. By energizing the electromagnetic assembly, the magnetic moving part moves upward. When the energizing of the electromagnetic assembly is stopped, the magnetic moving part moves downward under the action of gravity.

[0079] In another embodiment of the present invention, the valve core 2 is provided with an actuating structure 220. Under the impact of water flow, the actuating structure 220 drives the valve core 2 to move in an axial direction; so that during the spraying process of the spraying device 1, the actuating structure 220 drives the valve core 2 to move axially.

[0080] In one embodiment of the present invention, a resiliently deformable reset member is provided in the mounting cavity 130, and the reset member is connected to the valve core 2; when water enters the spray device 1, the actuating structure 220 drives the valve core 2 to move in one axial direction under the impact of water, and the reset member stores force; when the spray device 1 stops entering water, the reset member releases the stored force, driving the valve core 2 to move in another axial direction; thereby realizing the reciprocating motion of the valve core 2.

[0081] In one embodiment of the present invention, one end of the reset member is movably connected to an axial end wall of the valve core 2, and the other end is connected to an axial end chamber wall of the mounting cavity 130; this is to prevent the valve core 2 from rotating continuously during movement, constantly twisting the reset member, and causing damage to the reset member; preferably, an annular groove is provided on an axial end wall of the valve core 2, and an annular slider is connected to the reset member, the slider being movably embedded in the annular groove.

[0082] In another preferred embodiment of the present invention, the axis of the valve core 2 extends vertically, and the valve core 2 is located in the lower half of the mounting cavity 130 under the action of gravity. When water enters the spray device 1, the water flow impacts the action structure 220, causing the valve core 2 to move upward. This allows the valve core 2 to reciprocate while the gravity replaces the reset force provided by the reset member, reducing the number of components that need to be installed inside the spray device 1 and reducing the complexity of the spray device 1. At the same time, when the water flow drives the valve core 2 to move, the water thrust does not need to overcome the elastic force of the reset member. Even when the water pressure is low, the water inlet channel 120 can be switched and connected with different groups of spray channels 110.

[0083] In an embodiment of the present invention, when the spray device 1 is not working, the valve core 2 is located at the bottom of the mounting cavity 130, and the projection of the axial portion of the surrounding portion of the starting end of the second guide surface of the second guide structure 212 coincides with the axial portion of the surrounding portion of the starting end of the second slide 152.

[0084] When the spray device 1 starts to receive water, the water flow drives the actuating structure 220 and the valve core 2 to move upward. The part around the starting end of the second guide surface contacts the starting end of the second slide 152 of the second guide structure 142. The starting end of the second guide surface slides along the second slide 152 to the end of the second slide 152. The water inlet channel 120 is connected to a set of spray channels 110.

[0085] When the spray device 1 stops water intake, the valve core 2 begins its first stroke under the action of gravity and moves to the bottom of the mounting cavity 130;

[0086] When the spray device 1 is refilled with water, the valve core 2 begins its second stroke under the push of the water flow, and is guided by another second guide structure 142 to rotate to a third angle, so that the water inlet channel 120 is connected to another set of spray channels 110;

[0087] When the spray device 1 stops receiving water, the valve core 2 moves to the bottom of the mounting cavity 130 under the action of gravity, and is guided by the corresponding first guide structure 141 to rotate a third angle, so that the projection of the surrounding part of the starting end of the second guide surface of each second guide structure 212 of the valve core 2 in the axial direction coincides with the surrounding part of the starting end of the second slide 152.

[0088] In an embodiment of the present invention, a pressure relief hole 180 communicating with the outside is provided on the bottom chamber wall of the mounting cavity 130; so that when the spray device 1 stops water intake, the residual water in the mounting cavity 130 can be discharged through the pressure relief hole 180, thereby preventing the inside of the spray device 1 from becoming damp and moldy.

[0089] In an embodiment of the present invention, the actuating structure 220 is disposed on one end face of the valve core 2, and there is a space between the actuating structure 220 and the end face of the mounting cavity 130 on the same side, which communicates with the water inlet channel 120; preferably, the actuating structure 220 that expands radially outward is disposed on the outer periphery of one end face of the valve core 2 to increase the force-bearing area of ​​the actuating structure 220.

[0090] In one embodiment of the present invention, the water inlet channel 120 is connected to the lower end chamber wall of the mounting cavity 130, and the water outlet of the water inlet channel 120 is directly opposite the action structure 220 provided at the lower end of the valve core 2.

[0091] In another embodiment of the present invention, the water inlet channel 120 is connected to the upper chamber wall of the mounting cavity 130, and the valve core 2 is provided with a water guide channel 230 facing the water inlet channel 120. The water guide channel 230 passes through the valve core 2 in a vertical direction. An actuating structure 220 is provided at the bottom of the valve core 2. The actuating structure 220 is provided at a certain distance from the bottom of the mounting cavity 130. This allows the water to flow straight from the top through the water guide channel 230 to the bottom of the mounting cavity 130. The water flow fills the gap between the mounting cavity 130 and the actuating structure 220, and then drives the valve core 2 to move upward.

[0092] In an embodiment of the present invention, the diameter of the outlet end of the inlet channel 120 is less than or equal to the diameter of the water guide channel 230 of the valve core 2.

[0093] In an embodiment of the present invention, the mounting cavity 130 includes an upper chamber 131 and a lower chamber 132 arranged vertically. The upper chamber 131 is connected to the water inlet channel 120, and the peripheral sidewall of the valve core 2 is in dynamic contact with the chamber wall of the upper chamber 131. During the axial reciprocating motion of the valve core 2, the lower end of the valve core 2 is always located in the lower chamber 132. Correspondingly, the action structure 220 connected to the outer peripheral edge of the lower end face of the valve core 2 is movably disposed in the lower chamber 132.

[0094] In an embodiment of the present invention, the diameter of the lower chamber 132 is larger than the diameter of the upper chamber 131, the valve core 2 is a columnar structure, and the actuating structure 220 is an annular structure extending radially outward from the edge of the lower end face of the valve core 2.

[0095] In embodiments of the present invention, each second guide structure 212 protrudes from the peripheral sidewall of the valve core 2, and the lower end of each second guide structure 212 is connected to the upper surface of the actuating structure 220; preferably, during the axial reciprocating motion of the valve core 2, each second guide structure 212 dynamically contacts the peripheral sidewall of the mounting cavity 130; more preferably, when the valve core 2 moves axially to the bottom of the mounting cavity 130, the second guide portion is at least partially fitted against the peripheral sidewall of the upper cavity 131.

[0096] In embodiments of the present invention, each first guide structure 211 is disposed on the outer peripheral sidewall of the annular action structure 220.

[0097] In an embodiment of the present invention, the bottom chamber wall of the lower chamber 132 is provided with an upwardly protruding annular limiting structure 160, and each first guide structure 141 is connected to the inner peripheral sidewall of the annular limiting structure 160; preferably, each first guide structure 211 is in dynamic contact with the inner peripheral sidewall of the annular limiting structure 160; the limiting structure 160 supports the first guide structure 141, thereby improving the structural strength of the first guide structure 141; in addition, the limiting structure 160 limits each first guide structure 211, thereby preventing the valve core 2 from deviating radially during movement.

[0098] In one embodiment of the present invention, the valve core 2 is provided with a water distribution channel communicating with the water inlet channel 120 and a plurality of branch channels communicating with the water distribution channel. Each branch channel is respectively connected to one of the spray channels 110. After the valve core 2 is rotated, each branch channel is respectively connected to another set of spray channels 110.

[0099] In another preferred embodiment of the present invention, a sealing part 240 is provided on the valve core 2. The rotation of the valve core 2 drives the sealing part 240 to selectively block a group of spray channels 110, switching the water inlet channel 120 to another group of spray channels 110. Since the valve core 2 will reciprocate along the axis and rotate around the axis, forming a channel for water supply inside, it is easy to have rotation errors, resulting in poor water flow. By replacing it with a solution of providing a sealing part 240 on the valve core 2, the water inlet channel 120 can be directly connected to each spray channel 110. The rotation of the valve core 2 is only used to selectively block the corresponding group of spray channels 110 by each sealing part 240, reducing the requirement for the rotation angle of the valve core 2. Even when the rotation angle of the valve core 2 has a small error, the rotation direction of the spray device 1 can be stably switched.

[0100] In an embodiment of the present invention, a flow guiding structure 170 is provided inside the spray device 1. The flow guiding structure 170 has flow guiding channels that are connected to each spray channel 110 in a one-to-one manner. The water inlet of each flow guiding channel is connected to the water inlet channel 120 through the mounting cavity 130. The valve core 2 rotates to drive each sealing part 240 to selectively seal the water inlet of the flow guiding channel. By setting the water guiding structure, the path of the water flow can be adjusted, thereby increasing the degree of freedom of the distribution of each spray channel 110 in the spray device 1.

[0101] In an embodiment of the present invention, the flow guiding structure 170 extends radially inward along the mounting cavity 130, and the flow guiding structure 170 and one end chamber wall of the mounting cavity 130 are spaced apart axially to form an active space, and the inlet of the flow guiding channel is connected to the active space; so that when the valve core 2 moves axially to one end of the mounting cavity 130, the sealing part 240 is fastened to the inlet of the corresponding flow guiding channel.

[0102] In an embodiment of the present invention, the blocking part 240 extends outward from the outer peripheral wall of the valve core 2, and the extended end of the blocking part 240 extends into the active space.

[0103] In the embodiments of the present invention, the cross-section of the sealing part 240 is the same as the shape of the inlet of the guide channel, and the sealing part 240 can be separably embedded into the inlet of the guide channel; this ensures the stability of the corresponding spray channel 110 blocked by the sealing part 240. When the spray device 1 finishes water intake, the water in the mounting cavity 130 is discharged through the pressure relief hole 180, resulting in the water pressure in the spray channel 110 being greater than the pressure in the mounting cavity 130. The water in the spray channel 110 flows back to the mounting cavity 130, pushing the sealing part 240 to move downward. The water flowing back to the mounting cavity 130 is discharged through the pressure relief hole 180, reducing the residual water in the spray device 1. Furthermore, the backflowing water can push the sealing part 240 and the valve core 2 to move downward, ensuring the stability of the valve core 2 operation.

[0104] In an embodiment of the present invention, the inlet of the flow guiding channel is located on the bottom side wall of the flow guiding structure 170, the bottom end face of the valve core 2 is connected to the actuating structure 220, and the sealing part 240 is connected to the top of the actuating structure 220; preferably, an upwardly extending annular first sealing rib 250 is provided on the outer periphery of the top surface of the annular actuating structure 220, and the sealing part 240 is connected to the top of the first sealing rib 250; more preferably, the inner peripheral wall of the first sealing rib 250 is flush with the corresponding side wall of the sealing part 240; the first guide part is connected to the outer peripheral wall of the first sealing rib 250.

[0105] In embodiments of the present invention, each flow guiding structure 170 is arranged circumferentially along the valve core 2 and extends from the spray channel 110 toward the valve core 2; preferably, each adjacent flow guiding structure 170 shares the same sidewall.

[0106] In embodiments of the present invention, each flow guiding structure 170 has a downwardly extending second sealing rib on its extended end wall; after the valve core 2 moves upward along the axial direction, each second sealing rib is in contact with the inner circumferential side wall of the annular first sealing rib 250; preferably, each second sealing rib is connected end to end to form a circle.

[0107] In embodiments of the present invention, the flow channels of each flow guiding structure 170 are connected to the lower chamber 132, and the sidewalls of the extension ends of each flow guiding structure 170 cooperate to form the peripheral chamber wall of the first mounting cavity 130.

[0108] In an embodiment of the present invention, an upwardly protruding annular limiting structure 160 is provided on the bottom chamber wall of the mounting cavity 130, and the bottom side wall of the sealing part 240 is in contact with the extended end face of the annular limiting structure 160; preferably, when the sealing part 240 abuts against the limiting structure 160, the actuating structure 220 is spaced a certain distance from the bottom chamber wall of the mounting cavity 130; by providing the limiting structure 160, the sealing part 240 is supported, and a water inlet space is left between the actuating structure 220 and the bottom chamber wall of the mounting cavity 130, ensuring that the water flow can stably push the actuating component and drive the valve core 2 to move upward.

[0109] In an embodiment of the present invention, a guide groove 241 recessed inward is provided on the side of the sealing part 240 that is farther away from the flow guiding structure 170, and each guide groove 241 extends spirally around the axis of the valve core 2; preferably, the spiral extension direction of each guide groove 241 is the same as the extension direction of the second slide 152 of the second guide structure 142; by providing the spiral guide groove 241, the water flow pushes the sealing part 240 to move axially, and the water pushes the guide groove 241, which can help the sealing part 240 and the valve core 2 rotate, ensuring that the valve core 2 rotates accurately in the circumferential direction.

[0110] In an embodiment of the present invention, the spray channel 110 includes a set of first spray channels 111 and a set of second spray channels 112. The first spray channels 111 and the second spray channels 112 are alternately arranged along the circumference of the spray device 1. The first spray channel 111 is provided with a first driving hole that drives the spray device 1 to rotate in the forward direction, and the second spray channel 112 is provided with a second driving hole that drives the spray device 1 to rotate in the reverse direction.

[0111] In one embodiment of the present invention, the spraying device 1 includes multiple spraying arms 103, and each spraying arm 103 is provided with a spraying channel 110.

[0112] In another embodiment of the present invention, the spraying device 1 includes a plurality of spraying arms 103, and each spraying arm 103 is provided with at least one first spraying channel 111 and at least one second spraying channel 112; preferably, each spraying arm 103 is provided with one first spraying channel 111 and one second spraying channel 112.

[0113] In embodiments of the present invention, the number of first spray channels 111 and second spray channels 112 are equal;

[0114] In embodiments of the present invention, the number of sealing portions 240 and the number of first spray channels 111 are equal.

[0115] In a specific embodiment of the present invention, two spray channels 111 and two spray channels 112 are provided, and two sealing parts 240 are provided on the valve core 2 accordingly; after the valve core 2 reciprocates along the axial direction for one cycle, the valve core 2 rotates 90 degrees around the axis.

[0116] In an embodiment of the present invention, a dishwasher is also described, employing a spray device 1 of a dishwasher as described above.

[0117] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A spray device for a dishwasher, having an internal mounting cavity (130) that is connected to a water inlet channel (120) and at least two sets of spray channels (110); Its features are, The spray device (1) includes, The valve core (2) is installed in the mounting cavity (130) and can reciprocate along the axial direction; The guide structure (140) is set on the chamber wall of the mounting cavity (130) to convert the axial relative movement of the valve core (2) into the rotation of the valve core (2) around the axis; the rotation of the valve core (2) switches the water inlet channel (120) and each group of spray channels (110) to connect.

2. The spray device for a dishwasher according to claim 1, characterized in that, After one cycle of reciprocating motion, the valve core (2) rotates around the axis by a first angle, switching the water inlet channel (120) connected to one set of spray channels (110) to be connected to another set of spray channels (110).

3. The spray device for a dishwasher according to claim 2, characterized in that, The reciprocating motion of the valve core (2) includes a first stroke moving along an axial direction and a second stroke moving in the opposite direction; The guide structure (140) includes a first guide structure (141) and a second guide structure (142). In the first stroke, the first guide structure (141) guides the axially moving valve core (2) to rotate around the axis by a second angle. In the second stroke, the second guide structure (142) guides the axially moving valve core (2) to rotate around the axis by a third angle; the sum of the second angle and the third angle equals the first angle.

4. The spray device for a dishwasher according to any one of claims 1-3, characterized in that, A slide (150) extending spirally around an axis is formed on the guide structure (140), and a guide structure (210) is provided on the valve core (2). The guide structure (210) is in dynamic contact with the slide (150).

5. The spray device for a dishwasher according to claim 4, characterized in that, The guide structure (140) has a guide surface facing the axial side of the mounting cavity (130), and the guide surface forms a slide (150); Preferably, the guide structure (210) and the slide (150) of the guide structure (140) are in separable dynamic contact.

6. The spray device for a dishwasher according to claim 5, characterized in that, The guide structure (140) includes a first guide structure (141) and a second guide structure (142) spaced apart in the axial direction, and the opposite side end faces of the first guide structure (141) and the second guide structure (142) are respectively provided with slides (150); During the axial reciprocating motion of the valve core (2), the guide structure (210) reciprocates between the first guide structure (141) and the second guide structure (142); Preferably, the slide (150) includes a first slide (151) disposed on the first guide structure (141) and a second slide (152) disposed on the second guide structure (142); More preferably, the spiral extension directions of the first slide (151) and the second slide (152) are opposite; In another preferred embodiment, a plurality of first guide structures (141) and second guide structures (142) are arranged around the axis of valve core (2).

7. A spray device for a dishwasher according to any one of claims 1-6, characterized in that, The valve core (2) is provided with an actuating structure (220). Under the impact of water flow, the actuating structure (220) drives the valve core (2) to move in an axial direction. Preferably, the axis of the valve core (2) extends vertically, and the valve core (2) is located in the lower half of the mounting cavity (130) under the action of gravity; when the spray device (1) is filled with water, the water flow impacts the action structure (220) and drives the valve core (2) to move upward. In another preferred embodiment, the actuating structure (220) is disposed on one end face of the valve core (2), and there is a space between the actuating structure (220) and the end face of the mounting cavity (130) on the same side, which communicates with the water inlet channel (120).

8. A spray device for a dishwasher according to any one of claims 1-7, characterized in that, The valve core (2) is provided with a blocking part (240). When the valve core (2) rotates, the blocking part (240) can selectively block a set of spray channels (110) and switch the water inlet channel (120) to another set of spray channels (110).

9. The spray device for a dishwasher according to claim 8, characterized in that, The spray device (1) is provided with a flow guiding structure (170). The flow guiding structure (170) has flow guiding channels that correspond one-to-one with each spray channel (110). The inlet of each flow guiding channel is connected to the inlet channel (120) through the installation cavity (130). The valve core (2) rotates to drive each sealing part (240) to selectively seal the inlet of the flow guiding channel. Preferably, the flow guiding structure (170) extends radially inward along the mounting cavity (130), and the flow guiding structure (170) and one end chamber wall of the mounting cavity (130) are spaced apart axially to form an active space, and the inlet of the flow guiding channel is connected to the active space. More preferably, the sealing part (240) extends outward from the outer peripheral wall of the valve core (2), and the extended end of the sealing part (240) extends into the active space; More preferably, the sealing part (240) is provided with a guide groove 241 that is recessed inward on the side farther away from the flow guiding structure (170), and each guide groove 241 extends spirally around the axis of the valve core (2).

10. A dishwasher, characterized in that, The spray device (1) of a dishwasher according to any one of claims 1-9 is used.

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