Water distribution structure, spraying arm and cleaning machine

Abstract

The utility model relates to a water diversion structure, a spraying arm and a cleaning machine, the water diversion structure comprises a water diversion cavity and at least two flow channels communicated with the water diversion cavity, a water diversion piece is arranged in the water diversion cavity, the water diversion piece can rotate by a certain angle at the moment of water injection so as to enable the water diversion cavity to be communicated with at least one flow channel, and the water diversion piece is arranged in the water diversion cavity along the flowing direction of water flow. The water diversion cavity, the water diversion piece and the flow channel communicated with the water diversion cavity jointly constrain a water flow path which extends in the axial direction of the water diversion cavity and directly enters the flow channel after being transversely bent at the water diversion piece. The water flow path does not have circumferential bending in the water distribution cavity, the bending stroke of water flow is shortened, disturbance and resistance to the water flow are reduced, and therefore fluid energy loss can be effectively reduced, and the water flow conveying lift and the cleaning effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dish washer technical field, specifically for a kind of water distribution structure for switching water path, for the spray arm of cleaning machine, cleaning machine. BACKGROUND

[0002] Water needs to be pumped into the spray assembly in the washing cavity by pump water mechanism in dish washer, in the process, if water path needs to be switched or the switching of different flow channels is realized, corresponding water distribution structure is often needed to be set.

[0003] For example, the Chinese invention patent application "a spray arm in automatic water distribution dish washer" (application number: CN202311078244.7) with the application publication number CN116942049A discloses a similar water distribution structure, which includes branch pipe, rotating seat, ring cover and spray arm support, the side of spray arm support is provided with two transverse spray arms and two longitudinal spray arms distributed in "ten" shape, when water is injected into branch pipe, two arc-shaped flaps block two first water ports respectively, two longitudinal spray arms connect water path and implement water spraying, when water injection in branch pipe stops, float piece falls back and drives two arc-shaped flaps to twist 45°, when water is injected into branch pipe again, float piece drives two arc-shaped flaps to twist 45° again, two arc-shaped flaps block two second water ports respectively, two transverse spray arms connect water path and implement water spraying. The above scheme can change the water path connection state of two transverse spray arms and two longitudinal spray arms by controlling the water injection state of branch pipe, to realize the automatic change of upward and downward water spraying directions.

[0004] However, due to the limitation of water distribution structure in the above scheme, the flow path of water flow in water distribution area needs to be bent greatly, especially needs to be bent at a large angle in the circumferential direction in water distribution area, which will cause great disturbance and resistance to water flow, resulting in serious water flow loss, which greatly affects the lift and output effect of water flow delivery, and further affects the cleaning effect.

[0005] Therefore, the water distribution structure of existing cleaning machine and the spray structure related to water distribution structure need to be further improved. UTILITY MODEL CONTENTS

[0006] The first technical problem to be solved by the utility model is to provide a water distribution structure capable of effectively reducing fluid energy loss and improving water flow delivery lift and cleaning effect according to the status of prior art.

[0007] The second technical problem to be solved by the utility model is to provide a spray arm for cleaning machine capable of switching rotation direction by using water injection on-off state to expand spray range and improve cleaning effect according to the status of prior art.

[0008] The third technical problem to be solved by the utility model is to provide a cleaning machine with the above-mentioned spray arm in view of the prior art.

[0009] The utility model solves at least one above-mentioned technical problem adopts the technical scheme that:

[0010] A water distribution structure, comprising a water distribution cavity and at least two flow channels connected to the water distribution cavity, a water distribution member arranged in the water distribution cavity and capable of rotating by a certain angle at the moment of water injection to connect the water distribution cavity to at least one flow channel, along the water flow direction, the water distribution cavity, the water distribution member and the flow channel input end connected to the water distribution cavity jointly constrain a water flow path extending along the axial direction of the water distribution cavity and directly entering the flow channel after being bent laterally at the water distribution member; the water distribution structure switches the water distribution flow channel in the following manner.

[0011] With the above structure, the water distribution cavity, the water distribution member and the flow channel input end connected to the water distribution cavity jointly constrain a water flow path extending along the axial direction of the water distribution cavity and directly entering the flow channel after being bent laterally at the water distribution member, and the water flow path does not exist circumferential bending in the water distribution cavity, which shortens the bending stroke of the water flow, reduces the disturbance and resistance to the water flow, thereby effectively reducing the fluid energy loss and being beneficial to improving the water flow delivery head and cleaning effect.

[0012] Preferably, the water inlet ends of the flow channels are respectively connected to the side of the water distribution cavity, and the water flow path is L-shaped. This structure maximally shortens the bending stroke of the water flow and reduces the disturbance and resistance to the water flow.

[0013] Preferably, the water distribution cavity is a cylindrical structure with a lower port, and the flow channels are arranged vertically to the axial direction of the water distribution cavity. With this structure, the height of the water distribution structure and the flow channel part can be lowered, which further shortens the bending stroke of the water flow and saves the occupied space of the overall structure.

[0014] Preferably, the lower end of the water distribution cavity is open to form a water inlet, and the water distribution member comprises a water guide sleeve, the upper end of the water guide sleeve is closed, the lower end is open and forms a water inlet arranged corresponding to the water inlet. This structure unifies the water inlet direction of the water guide sleeve and the water distribution cavity to reduce the disturbance and resistance to the water flow.

[0015] Preferably, the water distribution member comprises a water guide sleeve, and the side wall of the water guide sleeve is provided with a water guide port for the water in the water distribution cavity to enter the flow channel. This structure facilitates the connection of the water distribution cavity and the flow channel by the water guide port. The number of water guide ports can be set to be multiple, and the specific setting can be based on the number, position (adjacent or spaced), angle of each rotation and switching target of the flow channels, without requiring the water guide ports and the flow channels to be completely equal.

[0016] The water jacket side wall between two adjacent water outlets forms a water retaining wall. When the water retaining wall is arranged at the water inlet end of the flow channel, the flow channel is separated from the water distribution cavity and cannot realize fluid flow.

[0017] Assuming that the closest switch state opposite flow channel A and flow channel B, the center angle of the two flow channel inlet (in the cross section of the water jacket) is θ, in the case of uniform distribution along the circumference of the water outlet, the angle of the water jacket single rotation is preferably α = θ, the number of water outlets is preferably m = 360° / θ, how to realize the switching of the switch state of flow channel A and B in a single rotation (from flow channel 1 on / flow channel 2 off to flow channel 1 off / flow channel 2 on), and without considering the shape and position of the flow channel itself, so that a more free flow channel arrangement can be realized.

[0018] Preferably, the number of water outlets and water retaining walls on the water distribution member is equal. Preferably, the width of the water outlet is w1, the width of the water retaining wall is w2, and the width of the flow channel is w3, which satisfies w3 < w2, so that when the water retaining wall rotates to the corresponding flow channel, it can be completely closed. Further preferably, w2 / w3 = 1.1-1.5, w3 / w1 = 1-1.2, which is advantageous for completely closing the flow channel when the water retaining wall rotates to the corresponding flow channel, and the two flow channels are not easily connected.

[0019] Further, the side wall of the water distribution cavity can be connected to multiple groups of flow channels, and each group of flow channels can include at least two secondary flow channels. The water distribution member can be rotated to realize the on-off of any group of flow channels. For example, the first group of flow channels includes two secondary flow channels, and when the water distribution member connects the water distribution cavity with the first group of flow channels, the two secondary flow channels in the first group of flow channels are connected with the water distribution cavity. The flow channel inlet of the secondary flow channel is centrally symmetric with respect to the water distribution cavity, and the shape and width of the secondary flow channel can be designed as needed.

[0020] Preferably, during the operation of the water distribution structure, the water flow in the water distribution cavity is switched once every time the water distribution member is rotated by a certain angle, which can change the flow state of the flow channel. This change can not only be the on-off switching of the flow channel mentioned above, but also the adjustment of the flow area of the flow channel.

[0021] Preferably, the flow channel has at least two flow states, and the flow channels are always different. The flow channel has at least two groups, and the flow states of the two groups are always switched alternately during the rotation of the water distribution member.

[0022] Preferably, the water distribution member is arranged to float up and down in the water distribution cavity, and a limiting structure is arranged in the water distribution cavity to limit the circumferential rotation of the water distribution member when the water distribution member is connected with the corresponding flow channel. The limiting structure is used to guide the circumferential rotation of the water distribution member during the upward floating process of the water distribution member, and to limit the upward and downward movement of the water distribution member when the water distribution member is in the upward floating or downward falling state.

[0023] Preferably, at least 80% of the limiting structure is located outside the inner wall of the water jacket (measured by the distance from the water jacket axis). Further preferably, the limiting structure is completely located outside the water jacket. Preferably, the limiting structure does not overlap with the flow path of the water flow in the water jacket. The above structure makes the setting position of the limiting structure as little as possible dependent on the water jacket, thereby reducing the disturbance and resistance to the water flow.

[0024] Preferably, the limiting structure is consistent with the limiting structure mentioned below in the spray arm.

[0025] Preferably, the angle of rotation of the water distribution member is 360° / n for each switching of the water flow on-off state, where n is a natural number and n≥4. Further preferably, n≥6. Still further, n is selected from 6, 8, 12, 16. In this way, only a small angle (not more than 60°) needs to be rotated for each switching of the water flow on-off state, which can greatly reduce its height (the height can be made more compact), and greatly reduce the lifting stroke of the rotating convex column once, so that the water distribution member is not easy to jam when switching, and the switching process is smoother.

[0026] A spray arm for a washing machine, comprising a body, the body being provided with a water inlet for water to enter the body, the body being provided with a first flow channel and a second flow channel which are relatively independent and partially intersected, the body being provided with a first jet hole in communication with the first flow channel and driving the body to rotate forward in a jet state, and a second jet hole in communication with the second flow channel and driving the body to rotate reverse in a jet state; the intersection of the first flow channel and the second flow channel forms a water distribution cavity, and the water distribution cavity is provided with a water distribution member which can rotate a certain angle at the moment of water injection to connect the water inlet with the first flow channel or the second flow channel.

[0027] The existing spray arm structure, the water inlet is located on one side wall of the spray arm, and water is discharged to both sides through the water inlet, the spray arm is driven to rotate by the viscous force of water dispersed in the flow channel, and a water injection hole is formed in the other side wall of the spray arm for spraying water column. Since the position of the dishes on the dish rack is fixed after the dish rack structure is fixed in the existing dishwasher, the inclination of the injection hole on the spray arm is relatively large in order to drive the spray arm to rotate by the viscous force of water flow, and the water column sprayed by the spray arm is approximately linear (strip) shape, which results in limited range of the sprayed water column, and all the surfaces of the tableware cannot be considered, there is a cleaning dead angle, and the cleaning effect is affected. The utility model discloses that the first flow channel, the second flow channel and the water distribution part are arranged in the body and are relatively independent and locally intersected, at the moment of water injection into the water inlet of the spray arm, the water distribution part is turned through a certain angle, the water distribution cavity is connected with the first flow channel, when water in the first flow channel is injected through the first jet hole, the spray arm is driven to rotate forward, after water injection into the water inlet is stopped, the water distribution part cancels the connection between the water distribution cavity and the first flow channel, at the moment of water injection into the water inlet again, the water distribution part is turned through a certain angle again, the water distribution cavity is connected with the second flow channel, when water in the second flow channel is injected through the second jet hole, the spray arm is driven to rotate reversely, the utility model realizes the switching of the rotating direction of the spray arm by controlling the on-off state of water injection, which is favorable for expanding the spray range and improving the cleaning effect.

[0028] Preferably, the water distribution part is rotated through a certain angle in the instantaneous state of the first water injection, the water inlet is connected with the first flow channel and is disconnected with the second flow channel, and the water distribution part is rotated through a certain angle in the instantaneous state of the second water injection, the water inlet is disconnected with the first flow channel and is connected with the second flow channel. The utility model realizes the switching of the rotating direction of the spray arm by controlling the on-off state of water injection, which is favorable for expanding the spray range and improving the cleaning effect.

[0029] Preferably, a water guide hole for guiding water in the water distribution cavity into the first flow channel or the second flow channel is formed in the side wall of the water distribution part, and a limiting structure for limiting the water distribution part in the circumferential direction in the connection state of the water distribution part and the first flow channel or the second flow channel is arranged in the water distribution cavity. The number of the water guide holes can be arranged according to the specific shape and number of the flow channel. By adopting the above structure, the corresponding state can be maintained in the connection state of the first flow channel or the second flow channel and the water distribution cavity, and the flow state of the fluid is stable.

[0030] Preferably, the water distribution part comprises a water guide sleeve, the upper end of the water guide sleeve is closed, the lower end is open and forms a water inlet corresponding to the arrangement of the water inlet. By adopting the above structure, the water inlet of the water inlet and the water guide hole is always kept stable.

[0031] Preferably, the central part of the inner top wall of the water jacket is downwardly convexly provided with a flow guide cone capable of dispersing the incoming water in the circumferential direction, and the tip of the flow guide cone is arranged towards the water inlet. By arranging the above structure, the water flow can be guided to the inlet of the flow passage in time, so as to reduce the energy loss of the water flow in the water distribution cavity and improve the lift.

[0032] Preferably, the water distribution member is arranged to be up-and-down floating in the water distribution cavity, and the limiting structure is used for guiding the circumferential rotation of the water distribution member during the up-floating or down-falling of the water distribution member, and limiting the up-and-down position of the water distribution member in the up-floating or down-falling completed state. By adopting the above structure, the switching of the rotating direction of the spray arm can be realized by controlling the on-off state of the water injection.

[0033] Preferably, the top edge of the water distribution member is convexly provided with a plurality of first teeth arranged in the circumferential direction and sequentially connected, and correspondingly, the inner top wall of the body is provided with a first convex column capable of cooperating with the first teeth during the up-floating of the water distribution member so as to rotate the water distribution member, and limiting the water distribution member in the completely up-floating state. The inner peripheral wall of the lower part of the water distribution cavity is provided with a plurality of second teeth arranged in the circumferential direction and sequentially connected upwards, and correspondingly, the outer peripheral wall of the water distribution member is provided with a second convex column near the lower end thereof, which is used for cooperating with the second teeth during the down-falling of the water distribution member so as to rotate the water distribution member, and limiting the water distribution member in the completely down-falling state. By adopting the above structure, in the completely up-floating state of the water distribution member, one flow passage is in communication with the water distribution cavity, and in the completely down-falling state of the water distribution member, all flow passages are in isolation from the water distribution cavity, so as to protect the flow passage structure. The above structure facilitates maintaining the corresponding state in the communication state of the first flow passage or the second flow passage with the water distribution cavity, and keeping the fluid flow stable.

[0034] Preferably, the body comprises an upper shell and a lower shell capable of being up-and-down matched to each other so as to constrain the first flow passage, the second flow passage and the water distribution cavity, and the lower shell is provided with a yielding opening corresponding to the water distribution cavity inner wall, in which the convex column slides into the limiting groove. The above structure facilitates the production and manufacturing of the spray arm as a whole.

[0035] Preferably, the lower end of each yielding opening is arranged through the first tooth surface of the first tooth. This structure can maximize the elimination of the influence of the yielding opening on the cooperation of the limiting groove and the convex column.

[0036] In one preferred embodiment, the water inlet is located at the center of the bottom wall of the main body. The first flow channel includes a first portion and a second portion extending on both sides of the water inlet, with the first portion arranged close to the first side wall of the main body and the second portion arranged close to the second side wall of the main body. The first portion and the second portion are connected by a transition section one. The second flow channel includes a first portion and a second portion extending on both sides of the water inlet, with the first portion arranged close to the first side wall of the main body and the second portion arranged close to the second side wall of the main body. The first portion and the second portion are connected by a transition section two, which intersect and form the water distribution cavity at the intersection. In another preferred embodiment, the water inlet is located at the center of the bottom wall of the main body, with the first flow channel located on the first side of the water inlet and the second flow channel located on the second side of the water inlet. The ends of the first flow channel and the second flow channel converge at the water inlet to form the water distribution cavity. The shape and specific structure of the first and second flow channels of this utility model can be designed according to needs. Correspondingly, the number of water outlets of the water distribution component, the size of the teeth on the limiting structure, and the tooth spacing can all be adjusted to meet more cleaning needs of consumers.

[0037] Preferably, the flow area of ​​the water guide sleeve is larger than the inlet area of ​​the main body. After the water flows into the water guide sleeve, the flow velocity decreases and the pressure increases, forming a certain buffering effect, making it easier to drive the water distribution component to rise and fall, and reducing pressure fluctuations.

[0038] A cleaning machine includes a housing and the aforementioned water distribution structure, which can be located inside or outside the housing and can be used for spray arms or water distribution valves, etc.

[0039] A cleaning machine includes a housing and the aforementioned spray arm, which is rotatable in either the forward or reverse direction within the housing.

[0040] Compared with the prior art, the advantages of this utility model are as follows: In this utility model, the water distribution cavity, the water distribution component, and the flow channel connected to the water distribution cavity together constrain the water flow path that extends axially along the water distribution cavity and bends laterally at the water distribution component before directly entering the flow channel. This water flow path does not have circumferential bends in the water distribution cavity, which shortens the bend stroke of the water flow, reduces the disturbance and resistance to the water flow, thereby effectively reducing fluid energy loss and improving the water flow conveying head and cleaning effect. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the spray arm in an embodiment of the present invention;

[0042] Figure 2 for Figure 1 A sectional view;

[0043] Figure 3 forFigure 1 an exploded view of

[0044] Figure 4 is Figure 3 another angle view;

[0045] Figure 5 is another structural schematic view of the spraying arm in the embodiment of the utility model;

[0046] Figure 6 is Figure 5 an exploded view of

[0047] Figure 7 is Figure 5 a sectional view of

[0048] Figure 8 is Figure 6 a partial enlarged view of the flow channel. DETAILED DESCRIPTION

[0049] The utility model will be described in further detail below in combination with the embodiment of the drawings.

[0050] Embodiment 1:

[0051] As shown in Figures 1 to 5 , the spraying arm for the cleaning machine in the embodiment comprises a body 1 extending along the length direction, the body 1 is provided with a water inlet 13 for water to enter the body 1, the body 1 is provided with a first flow channel 11 and a second flow channel 12 which are relatively independent and partially intersected, the top wall of the body 1 is provided with a plurality of first spraying holes 001 which are in communication with the first flow channel 11 and a plurality of second spraying holes 002 which are in communication with the second flow channel 12. The body 1 is provided with a first jet hole 111 which is in communication with the first flow channel 11 and drives the body 1 to rotate in the positive direction in the jet state, and a second jet hole 121 which is in communication with the second flow channel 12 and drives the body 1 to rotate in the reverse direction in the jet state. The intersection of the first flow channel 111 and the second flow channel 121 forms a water distribution cavity 14, and the water distribution cavity 14 is provided with a water distribution piece 2 which can rotate by a certain angle at the moment of water injection (or at the moment of falling) so as to communicate the water inlet 13 with the first flow channel 111 or the second flow channel 121.

[0052] The spraying arm of the utility model can have different shapes, as shown in Figure 1 , 5 , the structure of the spraying arm shown in Figure 1 , the first spraying hole 001 and the second spraying hole 002 which are in communication with the first flow channel and the second flow channel can be arranged on the same side of the water inlet 13 only, and the other side of the water inlet 13 can be provided with an auxiliary spraying arm which can rotate relative to the body 1 alone, so as to further expand the spraying coverage. The structure of the spraying arm shown in Figure 5The structure can make the first flow channel and the second flow channel both penetrate into the water inlet 13 and form an X-shaped structure, and the first spray hole 001 and the second spray hole 002 are arranged on both sides of the water inlet 13, so that the flow channels on both sides of the water inlet 13 are symmetrical, and the rotation stability of the spray arm is improved.

[0053] The water distribution part 2 rotates by a certain angle in the first water injection moment, the water inlet 13 is communicated with the first flow channel 11 and is cut off from the second flow channel 12; the water distribution part 2 rotates by a certain angle in the second water injection moment, the water inlet 13 is cut off from the first flow channel 11 and is communicated with the second flow channel 12. Specifically, in the water injection moment of the water inlet 13 of the spray arm, the water distribution part 2 rotates by a certain angle to connect the water distribution cavity 14 with the first flow channel 11, and when the water in the first flow channel 11 is sprayed out through the first jet hole 111, the spray arm is driven to rotate forward; after the water injection of the water inlet 13 is stopped, the water distribution part 2 cancels the connection between the water distribution cavity 14 and the first flow channel 11, and in the water injection moment of the water inlet 13, the water distribution part 2 rotates by a certain angle again to connect the water distribution cavity 14 with the second flow channel 12, and when the water in the second flow channel 12 is sprayed out through the second jet hole 121, the spray arm is driven to rotate reversely. The forward rotation in the embodiment is limited to the clockwise rotation, and the forward rotation only represents one rotation direction, and the reverse rotation represents the rotation direction opposite to the forward rotation.

[0054] In the embodiment, the water distribution part 2 is controlled in the water injection and cut-off state, the rotation direction of the spray arm is switched, the spray range is expanded, and the cleaning effect is improved.

[0055] In the embodiment, the side wall of the water distribution part 2 is provided with a water guide hole 21 for the water in the water distribution cavity 14 to enter the first flow channel 11 or the second flow channel 12, and the water distribution cavity 14 is provided with a limiting structure capable of limiting the water distribution part 2 in the circumferential direction when the water distribution part 2 is communicated with the first flow channel 11 or the second flow channel 12. The number of the water guide hole 21 can be set according to the specific shape and number of the flow channel. By using the above structure, the corresponding state can be maintained when the first flow channel 11 or the second flow channel 12 is communicated with the water distribution cavity 14, and the flow state is stable.

[0056] Specifically, the water distribution part 2 includes a water guide sleeve, the upper end of the water guide sleeve is closed, the lower end is open and forms a water inlet 22 corresponding to the arrangement of the water inlet 13. By using the above structure, the water inlet 13 and the water guide hole 21 are always kept stable. The water distribution part 2 can be floatingly arranged in the water distribution cavity 14, and the limiting structure is used for guiding the circumferential rotation of the water distribution part 2 during the floating or falling of the water distribution part 2, and limiting the water distribution part 2 in the up-down direction when the floating or falling of the water distribution part 2 is completed. By using the above structure, the rotation direction of the spray arm is switched by controlling the water injection and cut-off state.

[0057] The water blocking wall is arranged between the two water outlets 21 adjacent to the side wall of the water jacket, and when the water blocking wall is arranged at the water inlet end of the flow channel, the flow channel is blocked from the water distribution cavity and cannot realize fluid flow.

[0058] The top edge of the water distribution member 2 is provided with a plurality of first teeth 23 arranged circumferentially and connected in sequence, and correspondingly, the inner top wall of the body 1 is provided with a first protruding column 15 capable of cooperating with the first teeth 23 during the floating of the water distribution member 2 to rotate the water distribution member 2, and cooperating with the first teeth 23 in the fully floating state of the water distribution member 2 to limit the water distribution member 2; the inner circumferential wall of the lower part of the water distribution cavity 14 is provided with a plurality of second teeth 16 arranged circumferentially upward and connected in sequence, and correspondingly, the outer circumferential wall of the water distribution member 2 is provided with a second protruding column 24 near the lower end thereof, which is used for cooperating with the second teeth 16 during the falling of the water distribution member 2 to rotate the water distribution member 2, and cooperating with the second teeth 16 in the fully falling state of the water distribution member 2 to limit the water distribution member 2. With the above structure, in the fully floating state of the water distribution member 2, one flow channel is in communication with the water distribution cavity 14, and in the fully falling state of the water distribution member 2, all flow channels are in a blocked state with the water distribution cavity 14, so as to protect the flow channel structure.

[0059] The outer circumferential wall of the water distribution member 2 is provided with a guide rib 26 capable of guiding and cooperating with the inner wall of the water distribution cavity 14 during the floating or falling of the water distribution member 2, and the gravity of the water distribution member 2 is greater than the friction between the guide rib 26 and the inner wall of the water distribution cavity 14, and smaller than the upward impact force of the water flow at the moment of water flow communication.

[0060] The central part of the inner top wall of the water jacket is provided with a flow guide cone 25 capable of dispersing the incoming water circumferentially downward, and the tip of the flow guide cone 25 is arranged towards the water inlet 22. With the above structure, the water flow can be guided to the flow channel inlet in time, so as to reduce the water flow energy loss in the water distribution cavity and improve the lift.

[0061] The body 1 comprises an upper shell 101 and a lower shell 102 capable of being mutually matched upward and downward to constrain the first flow channel 11, the second flow channel 12 and the water distribution cavity 14. The above structure facilitates the production and manufacturing of the whole spray arm.

[0062] In this embodiment, the inlet 13 is located in the center of the bottom wall of the main body 1. The first flow channel 11 includes a first part 1101 and a second part 1102 extending on both sides of the inlet 13, with the first part 1101 arranged close to the first side wall of the main body 1 and the second part 1102 arranged close to the second side wall of the main body 1. The second flow channel 12 includes a first part 1201 and a second part 1202 extending on both sides of the inlet 13, with the first part 1201 arranged close to the first side wall of the main body and the second part 1202 arranged close to the second side wall of the main body. The first part 1101, the second part 1102, the first part 1201, and the second part 1202 intersect and connect with each other, forming a water distribution cavity 14 at the intersection.

[0063] The cleaning machine of this embodiment includes a housing and the aforementioned spray arm, which is installed in the housing and can rotate forward or backward.

[0064] In this embodiment, the main body 1 is provided with a relatively independent but partially converging first flow channel 11, second flow channel 12, and water distribution component 2. At the moment when water is injected into the spray arm inlet 13, the water distribution component 2 rotates through a certain angle, connecting the water distribution chamber 14 with the first flow channel 11. When the water in the first flow channel 11 is ejected through the first jet hole, it drives the spray arm to rotate forward. After stopping the injection of water into the inlet 13, the water distribution component 2 cancels the connection between the water distribution chamber 14 and the first flow channel 11. At the moment when water is injected into the inlet 13 again, the water distribution component 2 rotates through a certain angle again, connecting the water distribution chamber 14 with the second flow channel 12. When the water in the second flow channel 12 is ejected through the second jet hole, it drives the spray arm to rotate in reverse. This utility model realizes the switching of the rotation direction of the spray arm by controlling the on / off state of water injection, which is beneficial to expanding the spray range and improving the cleaning effect.

[0065] Example 2:

[0066] like Figures 5 to 8 As shown, the limiting structure of this embodiment includes a protruding post 23' on the outer peripheral wall of the water distribution component 2 and a limiting groove 15' arranged circumferentially on the inner wall of the water distribution cavity 14. The protruding post 23' is movably constrained in the limiting groove 15'. This structure facilitates the guidance of the rotation of the water distribution component 2 and the positioning of the water distribution component 2 in the cleaning state through the cooperation of the protruding post 23' and the limiting groove 15', so as to achieve smooth spray arm reversal and stable cleaning in a specific direction.

[0067] The upper edge of the limiting groove 15' is jagged and comprises a plurality of first teeth 151 which are connected to each other, and the lower edge of the limiting groove 15' is jagged and comprises a plurality of second teeth 152 which are connected to each other, and the tooth tips of the second teeth 152 are arranged corresponding to the tooth surfaces of the first teeth 151. In the rotating direction of the water distribution member 2, the slope of the first tooth surface 1511 of the first teeth 151 is greater than the slope of the second tooth surface 1512, and the slope of the third tooth surface 1521 of the second teeth 152 is greater than the slope of the fourth tooth surface 1522, and the tooth tips of the second teeth 152 are arranged corresponding to the second tooth surface 1512 of the first teeth 151. With the above structure, the convex column 23' is convenient to cooperate with the corresponding tooth surface and tooth groove in the state of floating up and down with the water distribution member 2, so as to realize the circumferential guidance or up and down limiting.

[0068] In the embodiment, between two adjacent first teeth 151 along the rotating direction of the water distribution piece 2, the end of the second tooth surface 1512 of the first tooth 151 located upstream and the start of the first tooth surface 1511 of the first tooth 151 located downstream form a first limiting area 01 for limiting the convex column 23' after the water distribution piece 2 is floated. The fourth tooth surface 1522 of the second tooth 152 corresponding to the first limiting area 01 forms a first guide surface for driving the water distribution piece 2 to rotate by a certain angle in the circumferential direction in the falling state of the water distribution piece 2, and the second tooth surface 1512 of the first tooth 151 corresponding to the first guide surface forms a second guide surface for driving the water distribution piece 2 to rotate by a certain angle in the circumferential direction in the floating state of the water distribution piece 2. The end of the second guide surface of the first tooth 151 and the start of the first tooth surface 1511 of the first tooth 151 connected downstream thereof form a second limiting area 02 for limiting the convex column 23' after the water distribution piece 2 is floated again. With the above structure, at the moment when the water inlet 13 is first supplied with water, the water distribution piece 2 is floated due to water inflow, in the process, the convex column 23' rotates and floats under the guidance of the corresponding tooth surface until it enters the first limiting area 01, at this time, the convex column 23' is limited, the water distribution piece 2 is temporarily positioned, that is, no upward and downward displacement and circumferential displacement occurs, the first flow channel 11 is communicated with the water distribution cavity 14, and the spray arm is positively rotated due to the pushing of the jet flow of the first jet hole; after the spray arm is positively rotated for a period of time, the water inlet 13 stops water inflow, at this time, due to the absence of water impact and buoyancy, the water distribution piece 2 falls under the action of gravity, the convex column 23' falls on the first guide surface, and after rotating by a certain angle in the circumferential direction in the state of the first guide surface, it is temporarily limited at the end of the first guide surface; at the moment when the water inlet 13 is supplied with water again, the water distribution piece 2 is floated due to water inflow, in the process, the convex column 23' rotates and floats under the guidance of the second guide surface until it enters the second limiting area 02, at this time, the convex column 23' is limited, the water distribution piece 2 is temporarily positioned, that is, no upward and downward displacement and circumferential displacement occurs, the second flow channel 12 is communicated with the water distribution cavity 14, and the spray arm is reversely rotated due to the pushing of the jet flow of the second jet hole. The utility model drives the water distribution piece 2 to rotate by a certain angle in the circumferential direction and then automatically limits it by using the tooth structure arranged in an upper-lower staggered mode in cooperation with water inflow buoyancy and the weight of the water distribution piece 2, which is simple in structure, easy to realize, and convenient to operate.

[0069] The convex column 23' is constrained in the first limiting area 01 state, the water inlet 13, the water distribution cavity 14, the water guide hole 21 and the first flow channel 11 are communicated and form the first water supply channel capable of cooperating with the first jet hole to make the spray arm positive rotation. The convex column 23' is constrained in the second limiting area 02 state, the water inlet 13, the water distribution cavity 14, the water guide hole 21 and the second flow channel 12 are communicated and form the second water supply channel capable of cooperating with the second jet hole to make the spray arm reverse rotation. The utility model is with the cooperation of the water distribution part 2 and the limiting structure, the on-off state of water injection is controlled, the switching of the rotation direction of the spray arm is realized, the spray range is expanded, and the cleaning effect is improved.

[0070] The body 1 comprises the upper shell 101 and the lower shell 102 that can be mutually matched upwards and downwards to constrain the first flow channel 11, the second flow channel 12 and the water distribution cavity 14, and the lower shell 102 is provided with the accommodation opening 103 corresponding to the inner wall of the water distribution cavity 14, wherein the convex column 23' slides into the limiting groove 15' from top to bottom. The above structure facilitates the production and manufacturing of the spray arm as a whole.

[0071] The lower end of each accommodation opening 103 is arranged through the first tooth surface 1511 of the first tooth 151. The structure can maximize the elimination of the influence of the accommodation opening on the cooperation of the limiting groove 15' and the convex column 23'.

[0072] In the description and claims of the present application, terms used for indicating directions, such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom" and the like, are used to describe various example structural parts and elements of the present application, but these terms are used only for the purpose of convenient description and are determined based on the example orientation shown in the drawings. Since the disclosed embodiments of the present application can be arranged in different directions, these terms indicating directions are only used for description and should not be regarded as limitation, for example, "up" and "down" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

Claims

1. A water distribution structure comprising a water distribution chamber and at least two flow channels in communication with the water distribution chamber, characterized in that: The water distribution cavity is provided with a water distribution member capable of connecting the water distribution cavity with at least one flow channel. In the water flow direction, the water distribution cavity, the water distribution member and the flow channel connected with the water distribution cavity jointly restrict a water flow path extending along the axial direction of the water distribution cavity and directly entering the flow channel after being bent laterally at the water distribution member.

2. The water diversion structure of claim 1, wherein: The water inlet end of each flow channel is connected with the side of the water distribution cavity, and the water flow path is L-shaped.

3. The water diversion structure of claim 2, wherein: The water distribution cavity is a cylindrical structure with a lower port, and each flow channel is arranged vertically to the axial direction of the water distribution cavity.

4. The water diversion structure of claim 1, wherein: The lower end of the water distribution cavity is open to form a water inlet port, and the water distribution member includes a water guide sleeve with a closed upper end and an open lower end to form a water inlet port arranged corresponding to the water inlet port.

5. The water diversion structure of claim 1, wherein: The water guide sleeve has a side wall with water guide ports for water in the water distribution cavity to enter the flow channel.

6. The water diversion structure of claim 5, wherein: The side wall of the water guide sleeve has two adjacent water guide ports forming a water blocking wall. When the water blocking wall is arranged corresponding to the water inlet end of the flow channel, the flow channel is blocked from the water distribution cavity and cannot realize fluid flow.

7. The water diversion structure of claim 6, wherein: The number of water guide ports and water blocking walls on the water distribution member is equal.

8. The water diversion structure of claim 6, wherein: The width of the water blocking wall is w2, and the width of the flow channel is w3, then w3 < w2, so when the water blocking wall rotates to the corresponding flow channel, it is completely closed.

9. The water diversion structure of claim 8, wherein: The width of the water guide port is w1, w2 / w3 = 1.1-1.5, and w3 / w1 = 1-1.

2.

10. The water diversion structure of claim 5, wherein: The side wall of the water distribution cavity can communicate with multiple groups of flow channels, and each group of flow channels includes at least two secondary flow channels. The water distribution member can realize the on-off of any group of flow channels by rotating.

11. The water diversion structure of claim 5, wherein: The flow channel has at least two flow states that are always different.

12. The water diversion structure of claim 5, wherein: The flow channel has at least two groups, and the flow state of the two groups is always alternately switched during the rotation of the water distribution member.

13. The water diversion structure of claim 12, wherein: The angle of rotation of the water distribution member is 360° / n for each switching of the water flow on-off state, where n is a natural number and n≥4.

14. The water diversion structure of claim 13, wherein: n is selected from 6, 8, 12 and 16.

15. The water diversion structure of claim 5, wherein: The water distribution member can be floating up and down in the water distribution cavity, and the water distribution cavity is provided with a limiting structure capable of limiting the water distribution member in the circumferential direction when the water distribution member is connected with the corresponding flow channel. The limiting structure is used for guiding the circumferential rotation of the water distribution member during the floating process of the water distribution member, and limiting the water distribution member in the up-down direction when the water distribution member is in the floating or falling state.

16. The water diversion structure of claim 15, wherein: At least 80% of the limiting structure is located outside the inner wall of the water guide sleeve.

17. The water diversion structure of claim 16, wherein: The limiting structure is completely located outside the water guide sleeve.

18. The water diversion structure of claim 15, wherein: The limiting structure does not overlap with the flow path of the water flow in the water guide sleeve.

19. A spray arm comprising a body (1) provided with a water inlet (13) for the entry of water into the body (1), characterised in that: The application has the body (1) provided with the first flow channel (11) and the second flow channel (12) which are relatively independent and locally intersected, the body (1) is provided with the first jet flow hole (111) communicated with the first flow channel (11) and driving the body (1) to rotate in the positive direction in the jet flow state and the second jet flow hole (121) communicated with the second flow channel (12) and driving the body (1) to rotate in the reverse direction in the jet flow state, the intersection of the first flow channel (11) and the second flow channel (12) forms the water distribution cavity (14), and the water distribution part (2) which can rotate by a certain angle in the instant of water injection to communicate the water inlet (13) with the first flow channel (11) or the second flow channel (12) is arranged in the water distribution cavity (14).

20. The spray arm of claim 19, wherein: The side wall of the water distribution part (2) is provided with the water guide hole (21) for guiding the water in the water distribution cavity (14) to enter the first flow channel (11) or the second flow channel (12), and the limiting structure which can limit the water distribution part (2) in the circumferential direction in the state of being communicated with the first flow channel (11) or the second flow channel (12) is arranged in the water distribution cavity (14).

21. The spray arm of claim 20, wherein: The water distribution part (2) comprises a water guide sleeve, the upper end of the water guide sleeve is closed, the lower end is open and forms the water inlet (22) arranged corresponding to the water inlet (13).

22. The spray arm of claim 21, wherein: The central part of the inner top wall of the water guide sleeve is downwardly provided with the flow guide cone (24) which can disperse the incoming water in the circumferential direction, and the tip of the flow guide cone (24) is arranged towards the water inlet (22).

23. The spray arm of claim 20, wherein: The water distribution part (2) is arranged in the water distribution cavity (14) and can float up and down, and the limiting structure is used for guiding the rotation of the water distribution part (2) in the circumferential direction in the process of floating up or falling down and limiting the water distribution part (2) in the up-down direction in the state of floating up or falling down.

24. The spray arm of claim 23, wherein: The top edge of the water distribution part is provided with a plurality of first teeth arranged in the circumferential direction and sequentially connected, and correspondingly, the inner top wall of the body is provided with the first convex column which can cooperate with the first teeth in the process of floating up of the water distribution part to rotate the water distribution part and limit the water distribution part in the state of completely floating up; the inner circumferential wall of the lower part of the water distribution cavity is provided with a plurality of second teeth arranged in the circumferential direction and upwardly and sequentially connected, and correspondingly, the outer circumferential wall of the water distribution part is provided with the second convex column near the lower end, which is used for cooperating with the second teeth in the process of falling down of the water distribution part to rotate the water distribution part and limiting the water distribution part in the state of completely falling down.

25. The spray arm of claim 24, wherein: The outer circumferential wall of the water distribution part is provided with the guide rib which can guide and cooperate with the inner wall of the water distribution cavity in the process of floating up or falling down of the water distribution part, the gravity of the water distribution part is greater than the friction between the guide rib and the inner wall of the water distribution cavity and smaller than the upward impact force of the water flow in the instant of water flow communication.

26. A cleaning machine comprising a housing, characterised in that: The application also comprises the spray arm of any one of claims 19-25, and the spray arm can rotate in the positive direction or the reverse direction and is arranged in the cabinet.

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