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 defines a spraying cavity; the first thrust spraying hole is used for pushing the body to rotate in the first direction; the second thrust spraying hole is used for pushing the body to rotate in the second direction; the second direction is opposite to the first direction; the pressure valve is movably arranged in the spraying cavity and is used for sealing the first thrust spraying hole or the second thrust spraying hole; and the pressure valve has a first state for sealing the first thrust spray hole and a second state for sealing the second thrust spray hole. By arranging the movable pressure valve, switching between closing of the first thrust spraying hole and closing of the second thrust spraying hole is achieved, then switching between forward rotation and reverse rotation of the rotary spraying arm is achieved, the structure is simple, and reduction of the manufacturing cost is facilitated. And the movement of the pressure valve is realized through the change of water pressure, so that the conversion control operation of forward rotation and reverse rotation of the rotary spraying arm is simple, and the conversion speed is high.

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 rotation 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 arranging a movable pressure valve, the conversion of closing the first thrust spray hole and the second thrust spray hole can be realized, and the conversion between the forward and reverse rotation of the rotary spray arm can be realized. The structure is simple, which is conducive to reducing the manufacturing cost.

[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 arranged to form a spray chamber; A first thrust spray hole, which is disposed on the body and is used to push the body to rotate along a first direction; A second thrust spray hole is provided on the body and is used to push the body to rotate along a second direction; The second direction is the opposite direction of the first direction; a pressure valve, which is movably disposed in the spray chamber and is used to close the first thrust spray hole or the second thrust spray hole; The pressure valve has a first state in which the first thrust injection hole is closed and a second state in which the second thrust injection hole is closed.

[0009] In some embodiments of the present application, the pressure valve has a movable valve core and an elastic member for pushing the valve core to reset. The valve core has a pressure-bearing part for bearing the impact of water flow in the spray chamber and a sealing part for closing the first thrust spray hole and the second thrust spray hole.

[0010] In some embodiments of the present application, the first thrust spray hole and the second thrust spray hole are spaced apart in the moving direction of the valve core, and the pressure-bearing part is subjected to the thrust given by the impact of the water flow to move away from the axis of the main body, and the elastic force given by the elastic member, thereby realizing the movement of the valve core.

[0011] In some embodiments of the present application, the first thrust spray hole is located on a side of the second thrust spray hole away from the axis of the body; there is a first working water pressure that pushes the rotating spray arm to rotate in a first direction, and a second working water pressure that pushes the rotating spray arm to rotate in a second direction, and the second working water pressure is greater than the first working water pressure.

[0012] In some embodiments of the present application, under the first working water pressure, the reaction force of the water flow ejected from the first thrust nozzle forms a first torque relative to the axis of the body; under the second working water pressure, the reaction force of the water flow ejected from the second thrust nozzle forms a second torque relative to the axis of the body; the magnitude of the first torque is equal to the magnitude of the second torque.

[0013] In some embodiments of the present application, the second working water pressure is the minimum water pressure that maintains the pressure valve to close the first thrust nozzle hole.

[0014] In some embodiments of the present application, the rotation direction of the rotary spray arm can be changed by changing the water pressure.

[0015] In some embodiments of the present application, when the rotary spray arm is rotating in a first direction, the pressure valve is moved toward the first thrust spray hole by controlling the water pressure to increase to a first reversing water pressure, and the first reversing water pressure is greater than the second working water pressure; after the pressure valve moves to close the first thrust spray hole, the water pressure is controlled to drop to the second working water pressure.

[0016] In some embodiments of the present application, when the rotary spray arm is rotating in the second direction, the water pressure is controlled to be reduced to a second reversing water pressure, so that the pressure valve is reset and moved in the direction of the second thrust spray hole, and the second reversing water pressure is less than the first working water pressure; after the pressure valve moves to close the second thrust spray hole, the water pressure is controlled to rise to the first working water pressure.

[0017] In some embodiments of the present application, a valve cavity area having a cross-section matching that of the valve core is provided in the spray cavity, one end of the elastic member abuts against the pressure-bearing portion, and the other end abuts against an end of the valve cavity area away from the axis of the body; the first thrust spray hole and the second thrust spray hole are both opened in the valve cavity area.

[0018] In some embodiments of the present application, a first water hole is opened in the pressure-bearing portion, and when the valve core closes the second thrust spray hole, the water flow in the spray chamber can reach the first thrust spray hole through the first water hole.

[0019] In some embodiments of the present application, a water flow area arranged side by side with the valve cavity area is provided in the vertical cross-section of the valve core movement direction in the spray cavity, and a second water flow hole connecting the valve cavity area and the water flow area is provided in the cavity wall of the valve cavity area.

[0020] In some embodiments of the present application, the pressure valve closes the second thrust nozzle hole in an initial state.

[0021] Based on the above-mentioned rotating spray arm, the present application also provides a spray washing equipment having the above-mentioned rotating spray arm. By setting a movable pressure valve, the conversion of closing the first thrust spray hole and the second thrust spray hole can be realized, and the conversion between the forward and reverse rotation of the rotating spray arm can be realized; and the structure is simple, which is conducive to reducing manufacturing costs.

[0022] A spray cleaning device comprises a cleaning chamber and the above-mentioned rotating spray arm rotatably arranged in the cleaning chamber.

[0023] Compared with the prior art, the advantages and positive effects of the present invention are: by setting the pressure valve to be movable, the conversion of closing the first thrust spray hole and the second thrust spray hole is realized, and then the conversion between the forward and reverse of the rotary spray arm is realized, so that the structure is simple and it is beneficial to reduce the manufacturing cost. And the change of water pressure is used to realize the movement of the pressure valve, so that the conversion control operation between the forward and reverse of the rotary spray arm is simple and the conversion speed is fast.

[0024] 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

[0025] 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.

[0026] 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 pressure valve on the middle right; Figure 5 It is a structural schematic diagram of a pressure valve; Figure 6 for Figure 3 Schematic diagram of the structure after mid-rotation steering; Figure 7 for Figure 6 An enlarged schematic diagram of the pressure valve on the left side of the middle; 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; valve cavity area 131; first thrust spray hole 15; second thrust spray hole 16; Rotating disk 21; rotating spray hole 211; water channel 212; fixed sleeve 22; retaining edge 221; Pressure valve 40; valve core 41; pressure bearing portion 411; first water hole 4111; blocking portion 412; elastic member 42; Cleaning chamber 200. Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them; the direction close to the axis of the body is "inside", and the opposite is "outside". Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] 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.

[0032] 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.

[0033] In this embodiment, the spray cleaning is set as a dishwasher, and the rotating spray arm 100 includes: a rotating spray arm, including: a body 10, the body 10 can be rotatably arranged, and the body 10 is surrounded to form a spray chamber 13; a plurality of spray holes 111 are opened on the body 10. A first thrust spray hole 15 and a second thrust spray hole 16 for driving the body 10 to rotate are also opened on the body 10, wherein two first thrust spray holes 15 and two second thrust spray holes 16 are provided at both ends of the body 10. The first thrust spray hole 15 is used to drive the body 10 to rotate in a first direction, and the second thrust spray hole 16 is used to drive the body 10 to rotate in a second direction; wherein the second direction is the opposite direction of the first direction. It is necessary to control one of the first thrust spray hole 15 and the second thrust spray hole 16 to be connected to the spray chamber 13, and the other is closed.

[0034] In this embodiment, a pressure valve 40 is provided, and the pressure valve 40 is movably arranged in the spray chamber 13, and is used to close the first thrust spray hole 15 or the second thrust spray hole 16. The pressure valve 40 has a first state of closing the first thrust spray hole 15 and a second state of closing the second thrust spray hole 16. The first thrust spray hole 15 or the second thrust spray hole 16 is closed by the movable pressure valve 40. The pressure valve 40 realizes the conversion between the first state and the second state by moving, and then realizes the conversion between the forward and reverse of the rotating spray arm 100, so that the structure is simple and it is beneficial to reduce the manufacturing cost. And the change of water pressure is used to realize the movement of the pressure valve 40, so that the forward and reverse conversion control operation of the rotating spray arm 100 is simple and the conversion speed is fast. In the rotating reversing process of the rotating spray arm 100, only the water pressure is increased or decreased, and the water supply does not need to be stopped, which is beneficial to reduce the washing time; so that in the reversing process, the rotating spray arm 100 is always in the spraying state, which is beneficial to improve the cleaning efficiency.

[0035] In some embodiments of the present application, the pressure valve 40 has a movable valve core 41, an elastic member 42 for pushing the valve core 41 to reset, and the valve core 41 has a pressure-bearing portion 411 for bearing the impact of water flow in the spray chamber 13, and a blocking portion 412 for closing the first thrust spray hole 15 and the second thrust spray hole 16. The water flow impacts the pressure-bearing portion 411, so that the water flow gives the pressure-bearing portion 411 a driving force, so that the pressure-bearing portion 411 pushes the elastic member 42 to compress until the impact force of the water flow and the elastic force of the elastic member 42 are balanced, and the valve core 41 no longer moves; therefore, according to the size of the elastic force of the elastic member 42 and the size of the pressure-bearing area of ​​the pressure-bearing portion 411, it can be set that under the first working water pressure, the pressure valve 40 closes the second thrust spray hole 16, so that the rotating spray arm 100 rotates in the first direction; under the second working water pressure, the pressure valve 40 closes the first thrust spray hole 16, so that the rotating spray arm 100 rotates in the second direction. In this way, by controlling different water pressures, different rotation directions of the rotating spray arm 100 can be controlled.

[0036] In some embodiments of the present application, the first thrust spray hole 15 and the second thrust spray hole 16 are arranged at intervals in the moving direction of the valve core 41, so that the valve core 41 can close the first thrust spray hole 15 and the second thrust spray hole 16 within the movable range. The pressure-bearing part 411 is subjected to the thrust force given by the impact of the water flow to move away from the axis direction of the body 10, and the elastic force given by the elastic member 42, so as to realize the movement of the valve core 41.

[0037] In some embodiments of the present application, the first thrust spray hole 15 is located on a side of the second thrust spray hole 16 away from the axis of the body 10, or in other words, the first thrust spray hole 15 is located outside the second thrust spray hole 16; see Figure 3As shown, at the first working water pressure, the valve core 41 is in a stable first state, at which the valve core 41 closes the second thrust spray hole 16, so that water flows out from the first thrust spray hole 15, and the reaction force of the sprayed water pushes the body 10 to rotate along the first direction; after the water pressure increases, the water pushes the valve core 41 to move in a direction away from the axis of the body 10, that is, the valve core 41 moves in the direction of the first thrust spray hole 15; see Figure 6 As shown, under the second working water pressure, the valve core 41 is in a stable second state, at which the valve core 41 closes the first thrust spray hole 15, so that the water flow is sprayed from the second thrust spray hole 16, and the reaction force of the sprayed water flow pushes the body 10 to rotate in the second direction. The second working water pressure will definitely be greater than the first working water pressure. Under the first working water pressure, the water flow is sprayed from the first thrust spray hole 15, and the first torque given to the body 10 by the spraying water flow is the product of the reaction force of the sprayed water flow under the first working water pressure and the distance between the direction of the first thrust spray hole 15 and the axis of the body 10; under the second working water pressure, the water flow is sprayed from the second thrust spray hole 16, and the second torque given to the body 10 by the spraying water flow is the product of the reaction force of the sprayed water flow under the second working water pressure and the distance between the direction of the second thrust spray hole 16 and the axis of the body 10. In other words, the distance between the reaction force and the axis of the body 10; the reaction force of the water flow under the first working pressure is smaller than the reaction force of the water flow under the second working pressure, and the distance between the direction of the first thrust spray hole 15 and the axis of the body 10 is larger than the distance between the direction of the second thrust spray hole 16 and the axis of the body 10; therefore, under the first working pressure and the second working pressure, the torque of the first direction rotation and the torque of the second direction rotation of the body 10 can be the same, that is, the rotation speed of the rotating spray arm 100 in forward and reverse rotation can be the same, which is conducive to the stability of spray washing. That is, under the first working water pressure, the reaction force of the water flow sprayed from the first thrust spray hole 15 forms a first torque relative to the axis of the body 10; under the second working water pressure, the reaction force of the water flow sprayed from the second thrust spray hole 16 forms a second torque relative to the axis of the body 10; the magnitude of the first torque and the magnitude of the second torque are equal and opposite, so that the rotation speed of the rotating spray arm 100 in forward and reverse rotation can be the same.

[0038] In some embodiments of the present application, see Figure 5-Figure 7 As shown, under the second working water pressure, the blocking portion 412 contacts the wall of the spray chamber 13, and when the water pressure increases further, the valve core 41 will no longer move, so that the second working water pressure can take values ​​within a larger range; preferably, the second working water pressure is set to be the minimum water pressure for maintaining the pressure valve 40 to close the first thrust spray hole 15.

[0039] In some embodiments of the present application, when the rotary spray arm 100 is rotating in the first direction, the water pressure is the first working water pressure. By controlling the water pressure to increase to the first reversing water pressure, the pressure valve 40 moves toward the first thrust spray hole 15, and the first reversing water pressure is greater than the second working water pressure. After the pressure valve 40 moves to close the first thrust spray hole 15, the water pressure is controlled to drop to the second working water pressure. By setting the first reversing water pressure to be greater than the second working water pressure, the water pressure difference between the first reversing water pressure and the first working water pressure is large, which is conducive to shortening the time for the body 10 to switch from the first working state to the second working state and improving the conversion efficiency. It is preferably arranged that when the water pressure is greater than the second working water pressure, the valve core 41 directly abuts against the cavity wall of the spray cavity 13. Under the first reversing water pressure, the valve core 41 closes the first thrust spray hole 15, preventing the valve core 41 from continuing to move outward and passing the first thrust spray hole 15.

[0040] In some embodiments of the present application, when the rotary spray arm 100 is rotating in the second direction, the water pressure is the second working water pressure. By controlling the water pressure to be reduced to the second reversing water pressure, the pressure valve 40 is reset and moved toward the second thrust spray hole 16, and the second reversing water pressure is less than the first working water pressure. After the pressure valve moves to close the second thrust spray hole 16, the water pressure is controlled to rise to the first working water pressure. By setting the second reversing water pressure to be less than the first working water pressure, the water pressure difference between the second reversing water pressure and the first working water pressure is large, which is conducive to shortening the time for the body 10 to switch from the second working state to the first working state and improving the conversion efficiency.

[0041] In some embodiments of the present application, see Figure 3-Figure 7 As shown, a valve cavity area 131 having a cross section matching the valve core 41 is provided in the spray cavity 13, one end of the elastic member 42 abuts against the pressure-bearing portion 411, and the other end abuts against the end of the valve cavity area 131 away from the axis of the body 10; the first thrust spray hole 15 and the second thrust spray hole 16 are both provided in the valve cavity area 131. The provision of the valve cavity area 131 is conducive to ensuring the moving path of the valve core 41 and the impact of the water flow on the valve core 41. The first and second convexities of the arc surface are provided on the cavity wall of the valve cavity area 131, the first thrust spray hole 15 is provided on the first convexity, and the second thrust spray hole 16 is provided on the second convexity.

[0042] There are two specific configurations of the valve cavity area 131. In the first configuration, the valve cavity area 131 is the area at the end of the valve cavity 13, and the valve core 41 matches the cross section of the valve cavity 13. When the valve core 41 closes the second thrust spray hole 16, the water flow needs to pass through the pressure-bearing portion 411 to reach the first thrust spray hole 15. The pressure-bearing portion 411 is provided with a first water hole 4111. When the valve core 41 closes the second thrust spray hole 16, the water flow in the spray cavity 13 can pass through the first water hole 4111 to reach the valve cavity area 131, and then reach the first thrust spray hole 15.

[0043] The second situation is that a water passing area (not shown in the figure) arranged side by side with the valve cavity area 131 is provided in the vertical cross section of the valve core 41 moving direction in the spray cavity 13, and a second water passing hole connecting the valve cavity area 131 and the water passing area is provided in the cavity wall of the valve cavity area 131. A part of the water flow in the spray cavity 13 directly enters the water passing area, and a part of the water flow impacts the valve core 41, and then bends and enters the water passing area; the water flow passes from the water passing area through the second water passing hole and enters the valve cavity area 131.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 can promote the rotation of the rotating disk 21, and the rotation of the rotating disk 21 drives the sprayed water flow to rotate.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] See also Figure 1-Figure 7 As shown, a control method for a spray cleaning device comprises the following steps: S10. The water pressure is controlled to be the first working water pressure, the valve core 41 closes the second thrust spray hole 16, and the rotary spray arm 100 rotates in the first direction.

[0052] Specifically, under the first working water pressure, the valve core 41 is in a stable first state, the valve core 41 closes the second thrust spray hole 16, so that water flows out from the first thrust spray hole 15, and the reaction force of the sprayed water flows pushes the body 10 to rotate along the first direction.

[0053] S20 . The control water pressure is increased to the first switching water pressure, so that the pressure valve 40 moves toward the first thrust spray hole 15 .

[0054] Specifically, the water pressure increases from the first working pressure to the first reversing water pressure, so that the rotation speed of the rotating spray arm 100 is accelerated; at the same time, under the push of the water flow, the valve core 41 moves outward; when the valve core 41 moves to the position between the first thrust spray hole 15 and the second thrust spray hole 16, the water flow can be sprayed out from the first thrust spray hole 15 and the second thrust spray hole 16 at the same time, so that the speed of the rotating spray arm 100 rotating in the first direction is reduced. By setting the first reversing water pressure to be greater than the second working water pressure, the water pressure difference between the first reversing water pressure and the first working water pressure is large, which is conducive to shortening the time for the body 10 to switch from the first working state to the second working state and improving the conversion efficiency.

[0055] S30. After the pressure valve 40 closes the first thrust nozzle hole 15, the water pressure is controlled to drop to the second working water pressure.

[0056] Specifically, after the pressure valve 40 closes the first thrust spray hole 15, the water pressure is reduced from the first reversing water pressure to the second working water pressure; the water flow is only sprayed from the second thrust spray hole 16, and the reaction of the sprayed water flow gives the rotating spray arm 100 a torque to rotate in the second reverse direction; the rotation of the rotating spray arm 100 in the first direction gradually stops, and then rotates in the second direction.

[0057] S40 . The water pressure is controlled to be reduced to the second switching water pressure, so that the pressure valve 40 is reset and moved toward the second thrust spray hole 16 .

[0058] Specifically, the water pressure is controlled to decrease from the second working water pressure to the second reversing water pressure. After the water pressure decreases, the rotation speed of the rotating spray arm 100 slows down, and under the elastic force of the elastic member 42, the valve core 41 is pushed to move toward the second thrust spray hole 16. When the valve core 41 moves to a position between the first thrust spray hole 15 and the second thrust spray hole 16, water can be ejected from the first thrust spray hole 15 and the second thrust spray hole 16 at the same time, so that the speed of the rotating spray arm 100 rotating in the second direction is reduced. By setting the second reversing water pressure to be lower than the first working water pressure, the water pressure difference between the second reversing water pressure and the second working water pressure is larger, which is conducive to shortening the time for the body 10 to switch from the second working state to the first working state and improving the conversion efficiency.

[0059] S50. After the pressure valve 40 closes the second thrust nozzle hole 16, the water pressure is controlled to increase to the first working water pressure.

[0060] Specifically, after the pressure valve moves to close the second thrust spray hole 16, the water pressure is controlled to rise to the first working water pressure. Water is sprayed from the first thrust spray hole 15, and the reaction of the sprayed water gives the rotating spray arm 100 a torque to rotate in the first reverse direction, so that the rotating spray arm 100 gradually stops rotating in the second direction and then rotates in the first direction.

[0061] 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 arranged to form a spray chamber; A first thrust spray hole, which is disposed on the body and is used to push the body to rotate along a first direction; A second thrust spray hole is provided on the body and is used to push the body to rotate along a second direction; The second direction is the opposite direction of the first direction; a pressure valve, which is movably disposed in the spray chamber and is used to close the first thrust spray hole or the second thrust spray hole; The pressure valve has a first state in which the first thrust injection hole is closed and a second state in which the second thrust injection hole is closed.

2. The rotary spray arm according to claim 1, characterized in that: The pressure valve comprises a movable valve core and an elastic member for pushing the valve core to reset. The valve core comprises a pressure-bearing portion for bearing the impact of water flow in the spray chamber and a blocking portion for closing the first thrust spray hole and the second thrust spray hole.

3. The rotary spray arm according to claim 2, characterized in that: The first thrust spray hole and the second thrust spray hole are spaced apart in the moving direction of the valve core, and the pressure-bearing part is subjected to the thrust given by the impact of the water flow to move away from the axis of the body, and the elastic force given by the elastic member, so as to realize the movement of the valve core.

4. The rotary spray arm according to claim 3, characterized in that: The first thrust spray hole is located on a side of the second thrust spray hole away from the axis of the body; there is a first working water pressure that pushes the rotating spray arm to rotate in a first direction, and a second working water pressure that pushes the rotating spray arm to rotate in a second direction, and the second working water pressure is greater than the first working water pressure.

5. The rotary spray arm according to claim 4, characterized in that: When the rotary spray arm rotates in a first direction, the water pressure is increased to a first reversing water pressure by controlling the pressure valve to move toward the first thrust spray hole, and the first reversing water pressure is greater than the second working water pressure; after the pressure valve moves to close the first thrust spray hole, the water pressure is controlled to drop to the second working water pressure.

6. The rotary spray arm according to claim 4, characterized in that: When the rotary spray arm rotates in the second direction, the water pressure is controlled to be reduced to a second reversing water pressure, so that the pressure valve is reset and moved toward the second thrust spray hole. The second reversing water pressure is less than the first working water pressure. After the pressure valve moves to close the second thrust spray hole, the water pressure is controlled to rise to the first working water pressure.

7. The rotary spray arm according to any one of claims 2 to 6, characterized in that: A valve cavity area with a cross section matching the valve core is provided in the spray cavity, one end of the elastic member abuts against the pressure-bearing portion, and the other end abuts against an end of the valve cavity area away from the axis of the body; the first thrust spray hole and the second thrust spray hole are both opened in the valve cavity area.

8. The rotary spray arm according to claim 7, characterized in that: The pressure-bearing portion is provided with a first water passage hole. When the valve core closes the second thrust spray hole, water in the spray chamber can reach the first thrust spray hole through the first water passage hole.

9. The rotary spray arm according to claim 7, characterized in that: A water passing area arranged side by side with the valve cavity area is provided in the vertical cross section of the valve core moving direction in the spray cavity, and a second water passing hole connecting the valve cavity area and the water passing area is provided in the cavity wall of the valve cavity area.

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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