Rotary spraying arm and spraying cleaning equipment

Abstract

The invention discloses a rotary spraying arm and spraying cleaning equipment, and the rotary spraying arm comprises a body which is rotatably arranged; the rotary pushing assembly is used for pushing the body to rotate bidirectionally; the rotary pushing assembly is provided with a steering head, and a thrust spraying hole used for pushing the body to rotate is formed in the steering head. The steering head has a first state for pushing the body to rotate forwards and a second state for pushing the body to rotate backwards, and the steering head rotates to achieve switching between the first state and the second state. The direction of water flow sprayed from the thrust spraying hole can be changed by arranging the steering head to be rotatable, when the steering head is in the first state and the second state, the sprayed water flow can give opposite torque to the rotary spraying arm, and forward rotation and reverse rotation of the rotary spraying arm are achieved; the bidirectional rotary spraying of the rotary spraying arm can be realized through the steering of the steering head, so that the structure is simple, and the manufacturing cost is favorably reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of spray cleaning equipment, and in particular relates to a rotary spray arm and spray cleaning equipment having the rotary spray arm. Background Art

[0002] Dishwashers are automated devices that automatically clean bowls, chopsticks, plates, and dishes. With the improvement of people's living standards, dishwashers are also used by more and more families. They can reduce the labor intensity of users, improve work efficiency, promote cleanliness and hygiene, and satisfy users' comfortable living experience.

[0003] In order to achieve a better cleaning effect, the existing spray device installed in the dishwasher is generally a rotatable spray arm, which is connected to the water channel. The water in the water channel is sprayed out through the spray holes on the spray arm to clean the dishes placed in the cleaning chamber. A plurality of spray holes and a thrust spray hole located at the outermost side are provided on the spray arm; the thrust spray hole is arranged to be inclined to one side to generate the power for the spray arm to rotate; the spray hole is arranged to be parallel to the axis of the spray arm to spray water upward or downward to rinse the objects to be cleaned.

[0004] At present, the horizontal rotation direction of the spray arm is fixed, that is, the spray arm always rotates in the same direction (such as counterclockwise), so that the direction and angle of the water flow for washing dishes are relatively simple. There are also spray arms that can rotate in both directions. For example, patent CN202010291296.2 discloses a dishwasher spray arm, including: at least one first spray arm, the reaction force of the spray water flow ejected by the first spray arm can drive the spray arm to rotate forward; at least one second spray arm, the reaction force of the spray water flow ejected by the second spray arm can drive the spray arm to rotate reversely; a distribution chamber; a distributor, which is movably located in the distribution chamber, and is used to alternately distribute the water flow flowing into the distribution chamber to the first spray arm and the second spray arm, so as to realize the forward and reverse alternating rotation of the spray arm.

[0005] In the above patent, the forward and reverse rotation of the spray arm is achieved by setting a first spray arm, a second spray arm, and a distributor, which makes the structure more complicated and the manufacturing cost higher; and when one of the first spray arm and the second spray arm is spraying, the other is idle, which increases the weight of the spray arm and reduces the rotation speed of the spray arm, which is not conducive to improving the cleaning efficiency, nor is it conducive to the compactness and integration of the structure.

[0006] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In view of the above-mentioned problems in the prior art, the present invention proposes a rotary spray arm. By setting a rotatable steering head, the conversion between the forward and reverse rotation of the rotary spray arm is realized, and bidirectional rotary spraying of the rotary spray arm can be realized. The structure is simple, which is conducive to reducing manufacturing costs.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: A rotary spray arm, comprising: A body, which is rotatably arranged; A plurality of spray holes are provided on the body; A rotation driving component, used for driving the bidirectional rotation of the body; The rotary pushing component comprises a steering head, on which a thrust spray hole for pushing the body to rotate is provided; the steering head has a first state for pushing the body to rotate forward and a second state for pushing the body to rotate reversely, and the steering head realizes the conversion between the first state and the second state by rotating.

[0009] In some embodiments of the present application, the reaction force of the thrust water flow ejected from the thrust nozzle can drive the body to rotate and provide a rotational torque to the steering head. The rotation propulsion assembly also has a limiting structure for limiting the steering head to be in the first state or the second state.

[0010] In some embodiments of the present application, when the water pressure supplied to the rotating spray arm reaches the reversing water pressure, the rotational torque applied to the steering head can overcome the limitation of the limiting structure, causing the steering head to rotate; the normal water pressure supplied to the rotating spray arm is less than the reversing water pressure.

[0011] In some embodiments of the present application, the rotary pushing assembly also has an assembly sleeve for assembling the steering head, and an assembly edge extending in the axial direction of the assembly sleeve is provided at the end of the assembly sleeve away from the main body, the steering head has an installation edge matching the assembly edge, and the limiting structure is provided between the assembly edge and the installation edge.

[0012] In some embodiments of the present application, two limiting structures with the same structure are provided between the assembly edge and the installation edge, and the two limiting structures are arranged opposite to each other in the circumferential direction; the limiting structure has a limiting protrusion provided on one of the assembly edge and the installation edge, and a limiting groove provided on the other of the assembly edge and the installation edge and matched with the limiting protrusion.

[0013] In some embodiments of the present application, a spray chamber is provided in the main body, a boss is provided on the main body, a through hole connected to the spray chamber is opened on the boss, the steering head is provided at the water outlet end of the through hole, and the assembly sleeve is provided on the outside of the boss.

[0014] In some embodiments of the present application, the steering head is movably arranged in the up and down directions; when the steering head is released from the limitation of the limiting structure from the first state, the steering head moves toward the direction close to the main body; thereafter, after the steering head rotates 180°, a limiting protrusion of one of the limiting structures matches with a limiting groove of another limiting structure to achieve limitation, and the steering head is limited to the second state.

[0015] In some embodiments of the present application, a device for supporting the steering head and preventing the restriction of the restriction structure from being released in a non-spraying state is provided at the water outlet end of the through hole, and the support member can be compressed in the up and down directions to achieve the movement of the steering head toward the main body.

[0016] In some embodiments of the present application, the support member is a brush.

[0017] In some embodiments of the present application, the steering head has a rotating cylinder and a spherical shell portion sealed at the end of the rotating cylinder, the thrust nozzle is opened in the spherical shell portion, and the water outlet direction of the thrust nozzle is arranged in a non-planar manner with the axis of the steering head.

[0018] Based on the above-mentioned rotary spray arm, the present invention also provides a spray cleaning equipment having the above-mentioned rotary spray arm. By setting the rotation of the steering head, the conversion between the forward and reverse rotation of the rotary spray arm is realized, and the bidirectional rotary spraying of the rotary spray arm can be realized; and the structure is simple, which is conducive to reducing manufacturing costs.

[0019] A spray cleaning device comprises a cleaning chamber and the above-mentioned rotating spray arm rotatably arranged in the cleaning chamber.

[0020] Compared with the prior art, the advantages and positive effects of the present invention are: by setting the steering head to be rotatable, the direction of the water flow sprayed from the thrust nozzle can be changed, and when the steering head is in the first state and the second state respectively, the sprayed water flow can give the rotating spray arm opposite torque, thereby realizing the forward and reverse rotation of the rotating spray arm; the bidirectional rotary spraying of the rotating spray arm can be realized by the steering of the steering head, which makes the structure simple and helps to reduce the manufacturing cost; and the forward and reverse conversion control operation of the rotating spray arm is simple and the conversion speed is fast.

[0021] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of a rotary spray arm proposed by the present invention; Figure 2 for Figure 1 Schematic diagram of the AA structure; Figure 3 for Figure 1 Schematic diagram of the structure in the middle BB direction; Figure 4 for Figure 3 An enlarged schematic diagram of the rotating push assembly on the left side of the middle; Figure 5 for Figure 4 A rear view structural diagram of ; Figure 6 It is a structural schematic diagram of the steering head; Figure 7 It is a structural diagram of the assembly set; Figure 8 for Figure 3 A schematic diagram of the top view of the structure at the middle fixed sleeve; Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure in CC direction; Fig.10 for Figure 8 Schematic diagram of the cross-sectional structure in the middle DD direction; Wherein, the rotating spray arm 100; Body 10; convex column 11; spray hole 111; spray cavity 13; boss 14; through hole 141; Rotating disk 21; rotating spray hole 211; water channel 212; fixed sleeve 22; retaining edge 221; Rotating push assembly 30; steering head 31; thrust spray hole 311; mounting edge 312; limiting protrusion 3121; rotating cylinder 315; spherical shell 316; assembly sleeve 32; assembly edge 321; limiting groove 3211; support member 33; Cleaning chamber 200. Implementation

[0024] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the positional relationships shown in the accompanying drawings. The terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0029] See also Figure 1-Figure 10, is an embodiment of a rotary spray arm proposed by the present invention, the rotary spray arm 100 is used on a spray cleaning device, the spray cleaning device has a cleaning chamber 200, and the rotary spray arm 100 is rotatably located in the cleaning chamber 200. The spray cleaning device can be a dishwasher, a shoe washing machine, or the like.

[0030] In this embodiment, the spray cleaning is set as a dishwasher, and the rotary spray arm 100 includes: a body 10 and a rotary push component 30, the body 10 can be rotatably arranged; a plurality of spray holes 111 are opened on the body 10. The rotary push component 30 is used to promote the bidirectional rotation of the body 10, that is, the rotary push component 30 can push the body 10 forward and can also push the body 10 to rotate in the reverse direction. The rotary push component 30 has a steering head 31, and a thrust spray hole 311 for promoting the rotation of the body 10 is opened on the steering head 31. After the water flow is sprayed through the thrust spray hole 311, the reaction force after the water flow is sprayed gives the body 10 a torque for rotation. The steering head 31 has a first state for pushing the body 10 forward and a second state for pushing the body 10 reversely. The steering head 31 realizes the conversion between the first state and the second state by rotation. Through the rotation of the steering head 31, the direction of the thrust spray hole 311 relative to the body 10 can be changed, so that the reaction force after the water flow is sprayed gives the body 10 a torque for rotation. The steering head 31 is arranged to rotate 180° to realize the mutual conversion between the first state of pushing the body 10 to rotate forwardly and the second state of pushing the body 10 to rotate reversely.

[0031] In this embodiment, by setting the steering head 31 to be rotatable, the direction of the water flow sprayed from the thrust spray hole 311 can be changed. When the steering head 31 is in the first state and the second state, the sprayed water flow flowing out of the thrust spray hole 311 can give the body 10 an opposite torque, thereby realizing the forward and reverse rotation of the rotary spray arm 100. The two-way rotary spraying of the rotary spray arm 100 can be realized by the steering of the steering head 31, which makes the structure simple and helps to reduce the manufacturing cost; and makes the forward and reverse conversion control operation of the rotary spray arm 100 simple and the conversion speed fast.

[0032] When the main body 10 needs to be controlled to rotate forward, the reversing head 31 needs to be in the first state; when the main body 10 needs to be controlled to rotate reversely, the reversing head 31 needs to be in the second state. The rotating push assembly 32 also has a limiting structure for limiting the steering head 31 to be in the first state or the second state. There are many ways to achieve the steering of the steering head 31, such as manual rotation, setting a special power structure, or achieving it by the reaction force after the water jet.

[0033] In this embodiment, the reaction force of the thrust water flow ejected from the thrust spray hole 311 can drive the body 10 to rotate and give the steering head 31 a rotation torque, that is, the reaction force of the thrust water flow ejected from the thrust spray hole 311 can drive the body 10 to rotate, and can also give the steering head 31 a rotation torque, which is used to drive the steering head 31 to rotate. The reaction force after the water flow is ejected drives the steering head 31 to rotate, which is conducive to the simplification of the structure, and the steering head 31 can be turned during the spray washing process.

[0034] In some embodiments of the present application, the steering head 31 needs to overcome the limitation of the limiting structure in order to achieve rotation; when the normal water pressure is sprayed, the reaction force after the water flow is sprayed from the thrust spray hole 311 cannot overcome the limitation of the limiting structure, ensuring that the steering head 31 is in the first state or the second state. Increasing the water pressure will increase the reaction of the spraying water flow to push the steering head 31; when the water pressure supplied to the rotating spray arm 100 reaches the reversing water pressure, the rotational torque received by the steering head 31 can overcome the limitation of the limiting structure, so that the steering head 31 rotates; the normal water pressure supplied to the rotating spray arm 100 is less than the reversing water pressure. In this way, when it is necessary to control the steering head 31 to turn, the main water pressure supplied to the rotating spray arm 100 only needs to be adjusted. The reaction force of the sprayed water flow acts on the reversing head 31, and under the limitation of the limiting structure, the reaction force is transmitted to the body through the steering head 31 to realize the rotation of the body 31. When the reversing head 31 turns, the reaction force of the sprayed water flow is used to push the reversing head 31 to rotate, so that the reaction cannot be transmitted to the body. And each time the steering head 31 turns and rotates 180°, it is sufficient to ensure that the two reversing heads 31 respectively arranged at both ends of the body 10 always maintain the same pushing and rotating direction for the body 10. It is preferred to set the water pressure to rise briefly to overcome the limitation of the limiting structure. In actual operation, it is to give a pulse to the water pump in the water circuit; then restore the normal water pressure, and the reaction of the water flow ejected from the thrust nozzle 311 under normal water pressure continues to push the reversing head 31 to rotate until it reaches the limiting structure after rotating 180°, and the steering is completed; avoid the steering head 31 from rotating continuously.

[0035] In some embodiments of the present application, see Figure 3-Figure 7As shown, the rotary push assembly 30 also has an assembly sleeve 32 for assembling the steering head 31. An assembly edge 321 extending in the axial direction of the assembly sleeve 32 is provided at one end of the assembly sleeve 32 away from the body 10. The steering head 31 has a mounting edge 312 matched with the assembly edge 321. A limiting structure is provided between the assembly edge 321 and the mounting edge 312. When the water flow impacts the reversing head 31, the water flow impact presses the reversing head 31 on the assembly edge 321, so that the mounting edge 312 is pressed on the assembly edge 321. The limiting structure is provided between the assembly edge 321 and the mounting edge 312 to ensure the effectiveness of the limiting structure. The assembly sleeve 32 is provided to realize the installation of the steering head 31.

[0036] In some embodiments of the present application, two limiting structures with the same structure are provided between the assembly edge 321 and the installation edge 312, and the two limiting structures are arranged opposite to each other in the circumferential direction, that is, they are 180° apart; the limiting structure has a limiting protrusion 3121 provided on the installation edge 312 and a limiting groove 3211 provided on the assembly edge 321, and the limiting groove 3211 is arranged to match the limiting protrusion 3121. By setting the two limiting structures to have the same structure, the limiting protrusion 3121 of one limiting structure and any one of the two limiting grooves 3211 can form a limiting structure. Similarly, the limiting groove 3211 of one limiting structure and any one of the two limiting protrusions 3121 can form a limiting structure. In this way, it is ensured that after the commutating head 31 rotates 180°, the limiting protrusion 3121 of one limiting structure and the limiting groove 3211 of another limiting structure are engaged and limited.

[0037] In some other embodiments of the main body application, the limiting structure may also be a limiting protrusion provided on the assembly edge 321 and a limiting groove provided on the installation edge 312.

[0038] In some embodiments of the present application, see Figure 3 and Figure 4 As shown, a spray chamber 13 is provided in the body 10, a boss 14 is provided on the body 10, and a through hole 141 communicating with the spray chamber 13 is opened on the boss 14; a steering head 31 is provided at the water outlet end of the through hole 141, and an assembly sleeve 32 is sleeved on the outer side of the boss 14. By providing the boss 14, the assembly sleeve 32 is fixed.

[0039] In some embodiments of the present application, the steering head 31 is movably arranged at the water outlet end of the through hole 141 in the up-down direction, so that when the engagement between the limiting protrusion 3121 and the limiting groove 3211 is released, the steering head 31 has space to move downward; and it is conducive to the rotational movement of the steering head 31. When the steering head 31 releases the limitation of the limiting structure from the first state, the limiting protrusion 3121 needs to be disengaged from the limiting groove 3211, and the steering head 31 will move downward, that is, move in the direction close to the body 10; then the steering head 31 rotates itself, and after the steering head 31 rotates 180°, the steering head 31 moves upward and resets under the push of water pressure, so that the limiting protrusion 3121 of one limiting structure matches the limiting groove 3211 of another limiting structure to achieve limitation; the steering head 31 is limited to the second state after rotating 180°.

[0040] In some embodiments of the present application, see Figure 4 and Figure 5 As shown, a support member 33 for supporting the steering head 31 is provided at the water outlet end of the through hole 141. The support member 33 makes the mounting edge 312 close to the assembly edge 321, which is used to prevent the restriction of the limiting structure from being released in the non-spraying state. When the rotating spray arm 100 is not spraying, the water pressure without water flow presses the steering head 31 on the assembly edge 321. In order to prevent the steering head 31 from moving downward, the limiting protrusion 3121 of the limiting structure is disengaged from the limiting groove 3211; the support member 33 is provided, and an upward support can be formed for the support member 33, and when the steering head 31 needs to move downward, the support member 33 can be compressed to provide space for the steering head 31 to move downward. The support member 33 is provided to be compressible in the up and down directions, so as to realize the movement of the steering head 31 toward the body 10. Under the support of the support member 33, it is necessary to ensure that the spacing between the mounting edge 312 and the assembly edge 321 is less than the height of the limiting protrusion 3121. Preferably, the installation edge 312 and the assembly edge 321 are spaced apart from each other, which is beneficial to realizing the rotation of the reversing head 31 .

[0041] In some embodiments of the present application, the support member 33 is a brush. The support member 33 can also be configured as a sponge, a spring, etc.

[0042] In some embodiments of the present application, the steering head 31 has a rotating cylinder 315, a spherical shell portion 316 sealed at the end of the rotating cylinder, a thrust spray hole 311 is provided in the spherical shell portion 316, and the water outlet direction of the thrust spray hole 311 is arranged in an eccentric plane with the axis of the steering head 31, so that the reaction force of the water flow ejected from the thrust spray hole 311 does not pass through the axis of the steering head 31, ensuring that the reaction force has a rotation torque for the steering head 31. The reaction force of the water flow ejected from the thrust spray hole 31 can not only drive the rotation of the rotating spray arm 100, but also drive the steering arm 31 to rotate after overcoming the limiting structure, and the sprayed water flow can also participate in washing dishes.

[0043] See also Figure 3 , Figure 8-Figure 10 As shown, the structure at the spray hole 111 is described, the turntable 21 is rotatably arranged at the water outlet end of the spray hole 111; a plurality of inclined rotating spray holes 211 are opened on the turntable 21, and the rotating spray holes 211 are used to promote the rotation of the turntable 21, and the plurality of rotating spray holes 211 are evenly distributed in the circumferential direction.

[0044] In the present application, a rotatable turntable 21 is provided at the spray hole 111, and the water flow sprayed vertically outward from the spray hole 111 can be tilted and sprayed out after passing through the rotating spray hole 211, so as to achieve dispersion of the sprayed water flow; the rotation of the turntable 21 plus the rotation of the body 10 makes the spray range of the water flow flowing through the rotating spray hole 211 larger and multi-angle, which is conducive to achieving multi-angle full coverage spraying in the cleaning chamber, and is conducive to improving the cleaning effect. The multiple rotating spray holes 211 are evenly distributed in the circumferential direction, which is conducive to ensuring that after the water flow is sprayed from the multiple rotating spray holes 211, the multiple torques that push the rotating disk 21 in the rotation direction will be superimposed to push the rotation of the rotating disk 21; and the multiple forces in other directions will offset each other, ensuring the rotation of the rotating disk 21. The reaction force of the water flow sprayed from the multiple rotating spray holes 211 is the same as the driving direction of the rotation of the rotating disk 21.

[0045] In some embodiments of the present application, the spray arm 100 further includes a fixing sleeve 22 for assembling the rotating disk 21, and a stop edge 221 extending in the axial direction of the spray hole 111 is provided at one end of the fixing sleeve 22 away from the body 10, and the stop edge 221 is provided on a side of the rotating disk 21 away from the body 10. The stop edge 221 is provided to limit the freedom of movement of the rotating disk 21 in the direction away from the body, and the fixing sleeve 22 is also used to limit the circumferential freedom of the rotating disk 21.

[0046] In some embodiments of the present application, the water outlet of the spray hole 111 is located in the fixed sleeve 22, and the rotating disk 21 is movable up and down between the water outlet of the spray hole 111 and the retaining edge 221, which is conducive to the rotation of the rotating disk 21. In the spraying state, the water flow impacting the spray hole 111 presses the rotating disk 21 on the retaining edge 221, and the water flow is sprayed from the rotating spray hole 211. The reaction force of the water flow spraying can drive the rotation of the rotating disk 21.

[0047] In some embodiments of the present application, a water groove 212 is provided on the rotating disk 21, and the water groove 212 is used to form a water film between the rotating disk 21 and the retaining edge 221, and when the rotating disk 21 rotates, the friction between the rotating disk 21 and the retaining edge 221 is reduced. Water can flow out of the water groove 212, and when the rotating disk 21 rotates, a water film is formed between the rotating disk 21 and the retaining edge 221.

[0048] In some embodiments of the present application, the distance between the inner side of the water groove 212 and the axis of the fixed sleeve 22 is smaller than the inner diameter of the retaining edge 221, that is, the water flowing out of the water groove 212 can flow out from the inner side of the retaining edge 221. It is preferred to set the depth of the water groove 212 to gradually decrease in the direction close to the axis of the fixed sleeve 22, which is conducive to increasing the water pressure when the water flows through the water groove 212, and is conducive to forming a circumferential water film between the rotating disk 21 and the retaining edge 221.

[0049] In some embodiments of the present application, a protruding column 11 is provided on the body 10, a spray hole 111 is opened on the column 11, and a fixing sleeve 22 is fixed on the outer side of the column 11. The multiple rotating spray holes 211 push the turntable 21 to rotate in the same direction.

[0050] See also Figure 1-Figure 7 As shown, a control method of a rotating spray arm 100 comprises the following steps: S10. When the rotary spray arm 100 rotates forward, the steering head 31 is in the first state; the water pressure in the water circuit is controlled to increase to the reversing water pressure, so that the limitation of the limiting structure is released and the steering head 31 rotates.

[0051] Specifically, when the water pressure supplied to the rotating spray arm 100 rises to the reversing water pressure, the reaction force of the water flow sprayed from the rotating spray hole 311 causes the rotational torque on the steering head 31 to overcome the limitation of the limiting structure, so that the steering head 31 rotates; the normal water pressure supplied to the rotating spray arm 100 is lower than the steering water pressure. In this way, when it is necessary to control the steering of the steering head 31, it is only necessary to adjust the water pressure supplied to the rotating spray arm 100. It is preferred to set the water pressure to increase briefly to overcome the limitation of the limiting structure. In actual operation, a pulse is given to the water pump in the water circuit; then the normal water pressure is restored. S20. Reduce the water pressure to normal water pressure, and the steering head 31 continues to rotate.

[0052] Specifically, the reaction of the water flow sprayed from the rotating spray hole 211 under normal water pressure continues to drive the reversing head 31 to rotate. The reaction cannot be transmitted to the body 10. At this time, the body 10 continues to rotate forward under the action of inertia, and the rotation speed gradually decreases.

[0053] S30. After the steering head 31 rotates 180°, the limiting structure engages to limit the steering head 31 to continue rotating, and the steering head 31 reaches the second state; water flows out from the thrust nozzle, giving the body 10 a torque for reverse rotation.

[0054] Specifically, after the steering head 31 rotates 180°, the steering head 31 moves upward and resets under the push of water pressure, so that the limiting protrusion 3121 of one limiting structure matches the limiting groove 3211 of another limiting structure to achieve limiting; the steering head 31 is limited to the second state after rotating 180°. Under the action of the reverse rotation torque, the main body 10 gradually stops the forward rotation and rotates in the reverse direction.

[0055] During the rotation and reversing process of the rotary spray arm 100, it is only necessary to increase the water pressure momentarily without stopping the water supply, which is beneficial to reducing the washing time; during the reversing process, the rotary spray arm 100 is always in a spraying state, which is beneficial to improving the cleaning efficiency.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A rotary spray arm, characterized in that: include: A body, which is rotatably arranged; A plurality of spray holes are provided on the body; A rotation driving component, used for driving the bidirectional rotation of the body; The rotary pushing component comprises a steering head, on which a thrust spray hole for pushing the body to rotate is provided; the steering head has a first state for pushing the body to rotate forward and a second state for pushing the body to rotate reversely, and the steering head realizes the conversion between the first state and the second state by rotating.

2. The rotary spray arm according to claim 1, characterized in that: The reaction force of the thrust water flow ejected from the thrust nozzle can drive the body to rotate and give the steering head a rotation torque. The rotation propulsion assembly also has a limiting structure for limiting the steering head to be in the first state or the second state.

3. The rotary spray arm according to claim 2, characterized in that: When the water pressure supplied to the rotary spray arm reaches the reversing water pressure, the rotational torque applied to the steering head can overcome the limitation of the limiting structure, so that the steering head rotates; the normal water pressure supplied to the rotary spray arm is lower than the reversing water pressure.

4. The rotary spray arm according to claim 2, characterized in that: The rotary pushing assembly also has an assembly sleeve for assembling the steering head, and an assembly edge extending in the axial direction of the assembly sleeve is provided at one end of the assembly sleeve away from the main body, the steering head has a mounting edge matching the assembly edge, and the limiting structure is provided between the assembly edge and the mounting edge.

5. The rotary spray arm according to claim 4, characterized in that: Two limiting structures with the same structure are arranged between the assembly edge and the installation edge, and the two limiting structures are arranged opposite to each other in the circumferential direction; the limiting structure has a limiting protrusion arranged on one of the assembly edge and the installation edge, and a limiting groove arranged on the other of the assembly edge and the installation edge and matched with the limiting protrusion.

6. The rotary spray arm according to claim 4, characterized in that: A spray cavity is arranged in the body, a boss is arranged on the body, a through hole communicating with the spray cavity is opened on the boss, the steering head is arranged at the water outlet end of the through hole, and the assembly sleeve is arranged on the outer side of the boss.

7. The rotary spray arm according to claim 6, characterized in that: A support for supporting the steering head and preventing the restriction structure from being released in a non-spraying state is provided at the water outlet end of the through hole. The support can be compressed in the up and down directions to achieve movement of the steering head toward the main body.

8. The rotary spray arm according to any one of claims 2 to 7, characterized in that: The steering head is movably arranged in the up and down directions; when the steering head releases the limitation of the limiting structure from the first state, the steering head moves toward the direction close to the main body; thereafter, after the steering head rotates 180°, a limiting protrusion of one limiting structure matches with a limiting groove of another limiting structure to achieve limitation, and the steering head is limited to the second state.

9. The rotary spray arm according to any one of claims 1 to 7, characterized in that: The steering head comprises a rotating cylinder and a spherical shell portion sealed at the end of the rotating cylinder. The thrust spray hole is arranged in the spherical shell portion. The water outlet direction of the thrust spray hole is arranged in an eccentric plane with the axis of the steering head.

10. A spray cleaning device, characterized in that: A rotary spray arm according to any one of claims 1 to 9 is provided, comprising a cleaning chamber and a rotary spray arm rotatably arranged in the cleaning chamber.

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