Spray arm, dishwasher, and dishwasher control method

Abstract

The present invention relates to a spray arm, a dishwasher, and a dishwasher control method. The spray arm includes a spray arm body, a spray arm cavity is provided in the spray arm body, the spray arm body is provided with spray holes communicating with the spray arm cavity, and there are at least two spray holes. A switching valve is provided in the spray arm cavity for controlling the number of spray holes in a conducting state. During use, the cleaning water first enters the spray arm cavity, and then the water in the spray arm cavity is sprayed through the spray holes into the inner cavity to clean the stains on the tableware in the inner cavity. The switching valve is provided in the spray arm cavity of the spray arm, and the number of spray holes in a conducting state is controlled through the switching process of the switching valve, so that the spray arm has different cleaning modes. Moreover, the switching valve is arranged in the spray arm cavity, making the overall external shape structure of the spray arm simple and having strong market competitiveness.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and particularly to a spray arm, a dishwasher and a dishwasher control method. Background Art

[0002] A dishwasher mainly includes a spray arm that sprays water into the inner cavity to clean the stains on the tableware. Based on the use, the placement of the tableware in the inner cavity has a certain randomness, and the quantity and oil stain degree of the tableware vary. Therefore, sometimes a stronger spraying force is required to clean the stains during the cleaning process, and sometimes mild cleaning can achieve the cleaning purpose. Therefore, the dishwasher needs to have different cleaning modes to meet the requirements of different working conditions. Generally, in order to enable the dishwasher to have different cleaning modes, a flow diversion device is arranged outside the spray arm to guide the water flow to different spray holes. Moreover, the spray arm also needs to be designed and assembled corresponding to the flow diversion device, and the overall external structure of the dishwasher is complex. Summary of the Invention

[0003] Based on this, it is necessary to provide a spray arm, a dishwasher and a dishwasher control method to simplify the structure.

[0004] A spray arm includes a spray arm body. A spray arm cavity is provided in the spray arm body. The spray arm body is provided with spray holes communicated with the spray arm cavity. There are at least two spray holes. A switching valve is provided in the spray arm cavity for controlling the number of spray holes in the conducting state.

[0005] The above solution provides a spray arm. During use, the cleaning water first enters the spray arm cavity, and then the water in the spray arm cavity is sprayed into the inner cavity through the spray holes to clean the stains on the tableware in the inner cavity. A switching valve is provided in the spray arm cavity of the spray arm. By controlling the switching process of the switching valve, the number of spray holes in the conducting state is controlled, so that the spray arm has different cleaning modes. When strong cleaning is required, more of the spray holes are controlled to be in the conducting state; when mild cleaning is required, fewer of the spray holes are controlled to be in the conducting state. Moreover, the switching valve is arranged in the spray arm cavity, making the overall external structure of the spray arm simple and having strong market competitiveness.

[0006] In one embodiment, the switching valve is a pressure sensing valve.

[0007] In one embodiment, the pressure sensing valve includes an elastic member and a sealing member. The sealing member is arranged corresponding to the spray hole. The elastic member is supported between the sealing member and the wall surface of the spray arm cavity, so that the sealing member can block the spray hole. The water pressure in the spray arm cavity can act on the sealing member to overcome the elastic force of the elastic member, so that the sealing member moves relative to the spray hole to control the spray hole to conduct.

[0008] In one embodiment, the pressure sensing valve further includes a mounting member provided with a through hole. One end of the mounting member is connected to the wall surface of the spray arm cavity, such that the through hole communicates with the spray hole, and the other end of the through hole communicates with the spray arm cavity. The elastic member and the sealing member are both disposed in the through hole. The elastic member is located between the spray hole and the sealing member. The sealing member is axially movable in the through hole to control the opening and closing of the through hole.

[0009] In one embodiment, the mounting member is a mounting cover provided at the spray hole of the spray arm body. The side wall of the mounting cover encloses the through hole, and the bottom wall of the mounting cover is provided with a perforation. The elastic member presses the sealing member against the bottom wall of the mounting cover, and the sealing member can shield the perforation. The outer diameter of the sealing member is smaller than the aperture of the through hole.

[0010] In one embodiment, a support ring is provided on the wall surface of the spray arm cavity, surrounding the outer periphery of the spray hole. The mounting member is detachably connected to the support ring, the through hole communicates with the support ring, and the elastic member and the sealing member are located in the support ring.

[0011] In one embodiment, the support ring is threadedly connected to the mounting member.

[0012] In one embodiment, a plurality of limiting ribs are provided on the inner wall of the support ring. The plurality of limiting ribs are circumferentially spaced along the support ring, and the limiting ribs are axially disposed along the support ring. The elastic member is located between the plurality of limiting ribs.

[0013] In one embodiment, the spray arm body is provided with a plurality of spray holes. The switching valve is used to control the opening and closing of at least one of the spray holes, and the other spray holes not controlled by the switching valve are in an open state.

[0014] In one embodiment, there are a plurality of switching valves, and one switching valve corresponds to one spray hole.

[0015] In one embodiment, the spray arm body is provided with a plurality of spray holes, and there are a plurality of pressure sensing valves. One pressure sensing valve corresponds to one spray hole. The plurality of pressure sensing valves are divided into at least two groups, and the elastic forces of the elastic members between the groups are different.

[0016] In one embodiment, the spray hole is provided on the top wall of the spray arm body. A water delivery hole is provided on the bottom wall of the spray arm body. The top wall, bottom wall and side wall of the spray arm body enclose the spray arm cavity. A buckle and a water delivery cylinder are provided on the outer side surface of the bottom wall. The water delivery cylinder corresponds to and communicates with the water delivery hole. The buckle is located outside the water delivery cylinder for snap connection with the inner tank.

[0017] In one embodiment, the bottom wall of the spray arm body is detachably connected to the side wall of the spray arm body, and / or the top wall of the spray arm body is detachably connected to the side wall of the spray arm body.

[0018] A dishwasher includes a dishwasher body and the above-mentioned spray arm, and the spray arm is located in the inner cavity of the dishwasher body.

[0019] The above solution provides a dishwasher that adopts the spray arm described in any of the above embodiments, enabling the dishwasher to have different cleaning modes. Moreover, the realization of different cleaning modes is achieved through the on-off valve provided in the spray arm cavity, and the external shape structure of the spray arm is simple. The assembly form between the spray arm and the dishwasher body can adopt the assembly form in traditional dishwashers, without increasing the assembly difficulty of the dishwasher, and has great market competitiveness.

[0020] A dishwasher control method is used to control the above-mentioned dishwasher, and the dishwasher control method includes the following steps:

[0021] Adjust the pumping pressure of the water pump in the dishwasher so that the on-off state of the on-off valve changes.

[0022] By adjusting the pumping pressure of the water pump in the dishwasher, the on-off state of the on-off valve is switched, enabling the dishwasher to have different cleaning modes and meeting the requirements of different working conditions. Moreover, directly using the change in the pumping pressure of the water pump to adjust the cleaning mode simplifies the control process. There is no need to add too many control devices, and the external shape structure of the dishwasher does not need to be changed compared with general dishwashers.

[0023] In one embodiment, the dishwasher control method further includes the following steps:

[0024] Obtain the cleaning mode of the dishwasher. If the dishwasher is in a strong cleaning state, adjust the pumping pressure of the water pump to a larger value so that more spray holes are in a conducting state;

[0025] If the dishwasher is in a mild cleaning state, adjust the pumping pressure of the water pump to a smaller value so that fewer spray holes are in a conducting state. Description of the Drawings

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0028] Figure 1 It is a cross-sectional view of the spray arm described in this embodiment;

[0029] Figure 2 is Figure 1 a partial enlarged view of part A in

[0030] Figure 3 It is a schematic structural diagram of the dishwasher described in this embodiment.

[0031] Explanation of reference numerals:

[0032] 10. Dishwasher; 11. Dishwasher body; 12. Inner cavity; 20. Spray arm; 21. Spray arm body; 211. Spray arm cavity; 212. Spray holes; 213. Support ring; 214. Limit rib; 215. Water delivery hole; 216. Buckle; 217. Water delivery cylinder; 22. Switch valve; 221. Elastic member; 222. Sealing member; 223. Mounting member; 2231. Perforation. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0034] As Figure 1 shown, in one embodiment, a spray arm 20 is provided. The spray arm 20 can be applied to household appliances such as the dishwasher 10 shown in Figure 3 or an oven, etc., for spraying water into the inner cavity 12 to wash the tableware in the inner cavity 12 or clean the wall surface of the inner cavity 12.

[0035] Specifically, in one embodiment, as Figure 1 shown, the spray arm 20 includes a spray arm body 21. A spray arm cavity 211 is provided in the spray arm body 21, and spray holes 212 communicating with the spray arm cavity 211 are provided on the spray arm body 21. During use, the cleaning water first enters the spray arm cavity 211, and the water in the spray arm cavity 211 is then sprayed into the inner cavity 12 through the spray holes 212 to clean the stains on the tableware in the inner cavity 12 or clean the wall surface of the inner cavity 12.

[0036] Furthermore, there are at least two spray holes 211, and a switching valve 22 is provided in the spray arm cavity 211 to control the number of the spray holes 212 in the conducting state. Thus, the spray arm 20 has different cleaning modes. When strong cleaning is required, the switching valve 22 is opened, so that more spray holes 212 are conducting and participate in the cleaning process, and the water consumption for cleaning is large. When mild cleaning is required, the switching valve 22 is closed, so that some of the spray holes 212 are blocked, and the water consumption for cleaning is small. Moreover, the switching valve 22 is arranged in the spray arm cavity 211, making the overall external shape structure of the spray arm 20 simple and having strong market competitiveness.

[0037] Furthermore, the on / off of at least one spray hole 212 is controlled by the switching valve 22, so that the spray arm 20 has different cleaning modes. Specifically, the on / off of each spray hole 212 can be controlled by the switching valve 22, but at this time, the conditions for opening and closing the switching valves 22 for controlling the on / off of different spray holes 212 are different, so that the opening and closing times of each switching valve 22 are different, making the spray arm 20 have different cleaning modes.

[0038] Furthermore, in one embodiment, the spray arm body 21 is provided with a plurality of spray holes 212, and the switching valve 22 is used to control the on / off of at least one spray hole 212, and the other spray holes 212 not controlled by the switching valve 22 are in the normally open state. Specifically, one switching valve 22 controls the on / off of one spray hole 212, or one switching valve 22 controls the on / off of two or more spray holes 212.

[0039] For example, the spray arm cavity 211 is divided into a plurality of cavities, and at least two spray holes 212 are correspondingly provided in each cavity. The switching valve 22 is used to control the on / off between the cavity and the water delivery hole 215 of the spray arm 20. At this time, one switching valve 22 can control the on / off of at least two spray holes 212 at the same time. Here, the water delivery hole 215 refers to the hole in the spray arm 20 for communicating with an external water pipe so that cleaning water can enter the spray arm cavity 211.

[0040] For example, as Figure 1 shown, in one embodiment, one switching valve 22 is provided at one spray hole 212, so that one switching valve 22 controls the on / off of one spray hole 212.

[0041] Furthermore, as Figure 1 shown, there are a plurality of switching valves 22, and one switching valve 22 corresponds to one spray hole 212.

[0042] More specifically, the on / off state of the on / off valve 22 is switched by changing the water pressure in the spray arm chamber 211. For example, when the water pressure in the spray arm chamber 211 exceeds a predetermined value, the on / off valve 22 opens, and the spray holes 212 controlled by the on / off valve 22 are connected. When the water pressure in the spray arm chamber 211 falls below the predetermined value, the on / off valve 22 closes.

[0043] For example, in one embodiment, the switch valve 22 is a pressure sensing valve that can change state according to the water pressure in the spray arm chamber 211 , thereby controlling the spray hole 212 to be turned on or off.

[0044] Optionally, the switch valve 22 may also be other valve body structures capable of controlling the on / off of the spray hole 212 , which is not specifically limited here.

[0045] Furthermore, in one embodiment, Figure 1 and Figure 2 As shown, the pressure-sensing valve includes an elastic member 221 and a sealing member 222. The sealing member 222 is positioned corresponding to the spray hole 212, and the elastic member 221 is supported between the sealing member 222 and the wall of the spray arm chamber 211, allowing the sealing member 222 to block the spray hole 212. The water pressure within the spray arm chamber 211 acts on the sealing member 222, overcoming the elastic force of the elastic member 221, causing the sealing member 222 to move relative to the spray hole 212, thereby controlling the flow of the spray hole 212.

[0046] When the water pressure in the spray arm chamber 211 is lower than a predetermined value, the force exerted by the water pressure on the sealing member 222 is insufficient to overcome the elastic force of the elastic member 221. Consequently, the sealing member 222 moves under the elastic force of the elastic member 221, blocking the spray hole 212. When the water pressure in the spray arm chamber 211 is higher than a predetermined value, the water pressure acts on the sealing member 222, overcoming the elastic force of the elastic member 221, causing the sealing member 222 to move relative to the spray hole 212, thereby unblocking the spray hole 212.

[0047] During the water spraying process, the spray arm 20 needs to use a driving component such as a water pump to provide pressure so that water can be sprayed out from the spray hole 212. In this case, the adjustment of the water pressure in the spray arm cavity 211 can be achieved by adjusting the driving component. It is only necessary to adjust the on and off of the switch valve 22 by controlling the size of the driving force of the driving component.

[0048] More specifically, in one embodiment, Figure 1 and Figure 2As shown, the pressure sensing valve further includes a mounting member 223. The mounting member 223 is provided with a through hole. One end of the mounting member 223 is connected to the wall surface of the spray arm cavity 211, such that the through hole communicates with the spray hole 212, and the other end of the through hole communicates with the spray arm cavity 211. The elastic member 221 and the sealing member 222 are both disposed in the through hole. The elastic member 221 is located between the spray hole 212 and the sealing member 222, and the elastic member 221 can apply a force to the sealing member 222 in a direction away from the spray hole 212. The sealing member 222 can move axially in the through hole to control the opening and closing of the through hole.

[0049] When the water pressure in the spray arm cavity 211 is less than a predetermined value, the elastic member 221 presses the sealing member 222 in a direction away from the spray hole 212, such that the elastic member 221 cooperates with the mounting member 223 at a first position to cut off the through hole, so that the spray hole 212 cannot pass water. When the water pressure in the spray arm cavity 211 is greater than the predetermined value, the force exerted by the water pressure on the sealing member 222 is greater than the elastic force provided by the elastic member 221. The sealing member 222 moves in a direction close to the spray hole 212, and the elastic member 221 cooperates with the mounting member 223 at a second position to make the through hole conduct, and the spray hole 212 discharges water.

[0050] Specifically, the aperture of the through hole at the first position of the mounting member 223 is smaller than the outer diameter of the sealing member 222, so that the through hole is cut off when the sealing member 222 fits into the first position; the aperture of the through hole at the second position of the mounting member 223 is larger than the outer diameter of the sealing member 222, so that the through hole conducts when the sealing member 222 fits into the second position.

[0051] Specifically, in one embodiment, as Figure 1 and Figure 2 shown, the mounting member 223 is a mounting cover. The mounting cover is provided at the spray hole 212 of the spray arm body 21, and the side wall of the mounting cover encloses the through hole. The bottom wall of the mounting cover is provided with a perforation 2231. The elastic member 221 presses the sealing member 222 against the bottom wall of the mounting cover, and the sealing member 222 can cover the perforation 2231. The outer diameter of the sealing member 222 is smaller than the aperture of the through hole.

[0052] When the water pressure is lower than a predetermined value, the seal 222 presses against the through-hole 2231, blocking it and blocking the through-hole. When the water pressure in the spray arm chamber 211 is higher than a predetermined value, the pressure on the side of the seal 222 facing the through-hole 2231 is greater than the elastic force of the elastic member 221, causing the seal 222 to move away from the through-hole 2231. A gap is created between the seal 222 and the wall of the through-hole, causing the through-hole to open and water to flow out of the spray hole 212.

[0053] Further, if Figure 1 and Figure 2 As shown, in one embodiment, a support ring 213 is provided on the wall of the spray arm cavity 211. The support ring 213 surrounds the outer circumference of the spray hole 212. The mounting member 223 is detachably connected to the support ring 213. The mounting member 223 is indirectly connected to the wall of the spray arm cavity 211 through the support ring 213. The through hole communicates with the support ring 213, and the elastic member 221 and the sealing member 222 are located in the support ring 213.

[0054] During the assembly process, the elastic member 221 and the sealing member 222 are placed in the support ring 213, and then the mounting member 223 is connected to the support ring 213. Specifically, in one embodiment, Figure 2 As shown, the support ring 213 is threadedly connected to the mounting member 223. The outer circumference of the support ring 213 is provided with an external thread, and the inner circumference of the side wall of the mounting member 223 is provided with an internal thread, and the external thread matches the internal thread.

[0055] Optionally, the mounting member 223 may also be directly connected to the wall surface of the spray arm chamber 211 , for example, by bonding.

[0056] Furthermore, in one embodiment, Figure 2 As shown, the inner wall of the support ring 213 is provided with a plurality of limiting ribs 214, which are spaced apart along the circumference of the support ring 213 and arranged axially along the support ring 213. The elastic member 221 is located between the plurality of limiting ribs 214. The plurality of limiting ribs 214 provide guidance for the elastic member 221, allowing the elastic member 221 to move and be compressed in the axial direction of the support ring 213. At the same time, the sealing member 222 can move smoothly axially in the through hole, ensuring the sensitivity and accuracy of the adjustment process.

[0057] Further, when the spray arm body 21 is provided with a plurality of the spray holes 212 and there are a plurality of the pressure sensing valves, with one pressure sensing valve corresponding to one spray hole 212. In one embodiment, the plurality of pressure sensing valves are divided into at least two groups, and the elastic force magnitudes of the elastic members 221 between the groups are different. In other words, the water pressure magnitudes required for the on-off state switching of the pressure sensing valves in different groups are different, thereby further expanding the cleaning working conditions that the spray arm 20 can adapt to. The greater the elastic force of the elastic member 221, the greater the water pressure required for this group of pressure sensing valves to switch between the on and off states.

[0058] Further, in one embodiment, as Figure 1 shown, the spray holes 212 are provided on the top wall of the spray arm body 21, and the bottom wall of the spray arm body 21 is provided with a water delivery hole 215 for introducing the water required for cleaning into the spray arm cavity 211. The top wall, bottom wall, and side wall of the spray arm body 21 enclose the spray arm cavity 211. The outer side surface of the bottom wall is provided with a buckle 216 and a water delivery cylinder 217, and the water delivery cylinder 217 is in corresponding communication with the water delivery hole 215. The buckle 216 is located outside the water delivery cylinder 217 and is used for snap-connecting with the inner tank.

[0059] When the spray arm 20 is assembled onto the inner tank, both the water delivery cylinder 217 and the buckle 216 are assembled with the inner tank. Under the action of the buckle 216, the spray arm 20 can rotate in the inner tank without falling off.

[0060] Further, in one embodiment, the bottom wall of the spray arm body 21 is detachably connected to the side wall of the spray arm body 21, and / or the top wall of the spray arm body 21 is detachably connected to the side wall of the spray arm body 21.

[0061] During the assembly process, first, the switching valve 22 is assembled in the spray arm cavity 211, and then the bottom wall, side wall, and top wall of the spray arm body 21 are assembled together.

[0062] Further, as Figure 3 shown, in another embodiment, a dishwasher 10 is provided, including a dishwasher body 11 and the above-mentioned spray arm 20, and the spray arm 20 is located in the inner cavity 12 of the dishwasher body 11.

[0063] The dishwasher 10 provided by the above solution adopts the spray arm 20 described in any of the above embodiments, so that the dishwasher 10 has different cleaning modes. Moreover, the realization of different cleaning modes is achieved by the switching valve 22 arranged in the spray arm cavity 211, and the external structure of the spray arm 20 is simple. The assembly form between the spray arm 20 and the dishwasher body 11 can adopt the assembly form in the traditional dishwasher 10, which will not increase the assembly difficulty of the dishwasher 10 and has great market competitiveness.

[0064] A dishwasher control method is used to control the dishwasher 10 in any of the above embodiments. The dishwasher control method includes the following steps:

[0065] Adjust the water pumping pressure of the water pump in the dishwasher 10 so that the switching state of the switching valve 22 changes.

[0066] By adjusting the water pumping pressure of the water pump in the dishwasher 10, the switching state of the switching valve 22 is switched, so that the dishwasher 10 has different cleaning modes to meet different working condition requirements. Moreover, the cleaning mode is directly adjusted by changing the water pumping pressure of the water pump, and the control process is simple. There is no need to add too many control devices, and there is no need to change the external structure of the dishwasher compared with ordinary dishwashers.

[0067] Further, in one embodiment, the dishwasher control method further includes the following steps:

[0068] Obtain the cleaning mode of the dishwasher 10. If the dishwasher 10 is in a strong cleaning state, adjust the water pumping pressure of the water pump to a larger value so that more spray holes 212 are in a conducting state;

[0069] If the dishwasher 10 is in a mild cleaning state, adjust the water pumping pressure of the water pump to a smaller value so that fewer spray holes 212 are in a conducting state.

[0070] When the water pumping pressure of the water pump is adjusted to a larger value, the water pressure in the spray arm cavity 211 is larger, the switching valve 22 is opened, and more spray holes 212 are in a conducting state. When the water pumping pressure of the water pump is adjusted to a smaller value, the water pressure in the spray arm cavity 211 is smaller, the switching valve 22 is closed, and fewer spray holes 212 are in a conducting state.

[0071] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0072] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0073] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0075] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0077] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A spray arm, characterized in that, It includes a spray arm body, a spray arm cavity is provided in the spray arm body, the spray arm body is provided with spray holes communicated with the spray arm cavity, there are at least two spray holes, and a switching valve is provided in the spray arm cavity for controlling the number of spray holes in the conducting state; The switching valve is a pressure sensing valve; the pressure sensing valve includes an elastic member and a sealing member, the sealing member is arranged corresponding to the spray hole, the elastic member is supported between the sealing member and the wall surface of the spray arm cavity, so that the sealing member can block the spray hole, and the water pressure in the spray arm cavity can act on the sealing member to overcome the elastic force of the elastic member, so that the sealing member moves relative to the spray hole to control the spray hole to conduct; The pressure sensing valve further includes a mounting member, the mounting member is provided with a through hole, one end of the mounting member is connected to the wall surface of the spray arm cavity, so that the through hole is communicated with the spray hole, the other end of the through hole is communicated with the spray arm cavity, the elastic member and the sealing member are both arranged in the through hole, the elastic member is located between the spray hole and the sealing member, and the sealing member can move axially in the through hole for controlling the on-off of the through hole.

2. The spray arm according to claim 1, wherein The mounting member is a mounting cover, the mounting cover is arranged at the spray hole of the spray arm body, the side wall of the mounting cover encloses the through hole, the bottom wall of the mounting cover is provided with a perforation, the elastic member presses the sealing member against the bottom wall of the mounting cover, the sealing member can shield the perforation, and the outer diameter of the sealing member is smaller than the aperture of the through hole.

3. The spray arm according to claim 1, characterized in that, A support ring is provided on the wall surface of the spray arm cavity, the support ring surrounds the outer periphery of the spray hole, the mounting member is detachably connected to the support ring, the through hole is communicated with the support ring, and the elastic member and the sealing member are located in the support ring.

4. The spray arm according to claim 3, characterized in that, The support ring is threadedly connected to the mounting member.

5. The spray arm according to claim 3, characterized in that, A plurality of limiting ribs are provided on the inner wall of the support ring, the plurality of limiting ribs are spaced apart along the circumferential direction of the support ring, the limiting ribs are arranged along the axial direction of the support ring, and the elastic member is located between the plurality of limiting ribs.

6. The spray arm according to any one of claims 1 to 5, characterized in that The spray arm body is provided with a plurality of the spray holes, the switching valve is used for controlling the on-off of at least one of the spray holes, and the other spray holes not controlled by the switching valve are in a normally open state.

7. The spray arm according to claim 6, characterized in that, There are a plurality of the switching valves, and one switching valve corresponds to one spray hole.

8. The spray arm according to any one of claims 1 to 5, characterized in that, The spray arm body is provided with a plurality of the spray holes, there are a plurality of the pressure sensing valves, one pressure sensing valve corresponds to one spray hole, and the plurality of pressure sensing valves are divided into at least two groups, and the elastic forces of the elastic members between the groups are different.

9. The spray arm according to any one of claims 1 to 5, characterized in that The spray holes are arranged on the top wall of the spray arm body, a water delivery hole is provided on the bottom wall of the spray arm body, the top wall, the bottom wall and the side wall of the spray arm body enclose the spray arm cavity, a buckle and a water delivery cylinder are provided on the outer side surface of the bottom wall, the water delivery cylinder is correspondingly communicated with the water delivery hole, and the buckle is located outside the water delivery cylinder for detachably connecting with the inner tank.

10. The spray arm according to claim 9, characterized in that, The bottom wall of the spray arm body is detachably connected to the side wall of the spray arm body, and / or the top wall of the spray arm body is detachably connected to the side wall of the spray arm body.

11. A dishwasher, characterized in that, Comprising a dishwasher body and the spray arm according to any one of claims 1 to 10, the spray arm being located in the inner cavity of the dishwasher body.

12. A dishwasher control method, characterized in that, For controlling the dishwasher according to claim 11, the dishwasher control method comprising the following steps: Adjust the water pumping pressure of the water pump in the dishwasher so that the switching state of the switching valve changes.

13. The dishwasher control method according to claim 12, wherein It further comprises the following steps: Obtain the cleaning mode of the dishwasher. If the dishwasher is in a strong cleaning state, adjust the water pumping pressure of the water pump to a larger value so that more spray holes are in a conducting state; If the dishwasher is in a mild cleaning state, adjust the water pumping pressure of the water pump to a smaller value so that fewer spray holes are in a conducting state.

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