Spraying arm and dish washing machine

Abstract

The invention discloses a gushing arm and a dish washing machine, the gushing arm can comprise a gushing arm main body and a plurality of nozzles, the gushing arm main body can comprise a first plate body, and a plurality of water outlet holes are formed in the first plate body. A spraying channel is formed in each spraying head, each spraying head corresponds to one water outlet hole and is connected with the spraying arm main body, and the spraying channel of each spraying head is communicated with the corresponding water outlet hole. Wherein in every two adjacent nozzles, the projection, in the first plane, of the water curtain sprayed by at least one nozzle is in a fan shape, and the projections, in the first plane, of the water curtains sprayed by every two adjacent nozzles have an overlapping area. According to the technical scheme provided by the invention, to-be-cleaned articles stored in a large area in the dish washing machine can be cleaned, and a better cleaning effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of dishwashers, and in particular to a spray arm and a dishwasher. Background Art

[0002] With the improvement of people's living standards, dishwashers have been widely used. The current working principle of dishwashers is to supply water with a certain pressure, transport water to each nozzle, and then spray water to the tableware in the dishwasher through the nozzle, so as to achieve the jet cleaning effect of the tableware in the dishwasher.

[0003] However, in the related art, when the dishwasher is in use, it is only possible to clean the dishes stored in a small area, and the cleaning effect needs to be improved. Summary of the invention

[0004] The main purpose of the present invention is to provide a spray arm and a dishwasher, aiming to solve the technical problem in the related art that the dishwasher can only clean tableware stored in a small area and the cleaning effect needs to be improved.

[0005] To achieve the above object, the present invention provides a spray arm, comprising:

[0006] A spray arm body, the spray arm body comprising a first plate body, a plurality of water outlet holes being formed on the first plate body;

[0007] A plurality of nozzles, each of which is formed with a spray channel, each of which corresponds to one of the water outlet holes and is connected to the spray arm body, and the spray channel of each nozzle is connected to the corresponding water outlet hole;

[0008] Among the two adjacent nozzles, the projection of the water curtain sprayed by at least one of the nozzles in the first plane is fan-shaped, and the projections of the water curtains sprayed by the two adjacent nozzles in the first plane have an overlapping area.

[0009] Optionally, the projections of the water curtains sprayed by each of the nozzles on the first plane are fan-shaped, and the projections of the water curtains sprayed by every two adjacent nozzles on the first plane have an overlapping area.

[0010] Optionally, the injection channel comprises:

[0011] A first channel, which is arranged near the water outlet and has one end connected to the water outlet and the other end extending in a direction away from the water outlet;

[0012] A second channel is arranged on a side of the first channel away from the water outlet and is connected to the first channel. The second channel runs through the surface of the nozzle away from the water outlet. The maximum width of the second channel in the first direction is smaller than the minimum width of the first channel in the first direction, and the first direction is perpendicular to the first plane.

[0013] Optionally, a projection of a contour line at a water outlet of the second channel in the first plane is convexly arranged in a direction away from the first channel; and / or

[0014] Along the water flow transmission direction, the width of the first channel in the first direction gradually decreases; and / or

[0015] The inner wall surface of the second channel includes a first surface and a second surface that are oppositely distributed along the first direction, and the first surface and the second surface are both planes and parallel to each other.

[0016] Optionally, the injection channel further comprises:

[0017] The third channel is connected between the first channel and the second channel, and along the water flow transmission direction, the width of the third channel in the first direction gradually decreases.

[0018] Optionally, along the water flow transmission direction, the inner wall surface of the first channel is a frustum surface with a gradually decreasing inner diameter;

[0019] Along the water flow transmission direction, the inner wall surface of the third channel is a hemispherical surface with a gradually decreasing inner diameter.

[0020] Optionally, along the water flow transmission direction, the sum of the heights of the third channel and the second channel is greater than or equal to 3 mm and less than or equal to 6 mm.

[0021] Optionally, the water curtains sprayed by two adjacent nozzles are located in different planes respectively; and / or

[0022] The distance between the projections of two adjacent nozzles on the first plane is less than or equal to 30 mm; and / or

[0023] The spray arm body can rotate around a first axis, and the first axis is parallel to the first plane.

[0024] Optionally, the spray arm body further includes:

[0025] A second plate body, spaced apart from the first plate body;

[0026] The peripheral side plate is located between the first plate body and the second plate body and connects the first plate body and the second plate body. A chamber is formed between the peripheral side plate, the first plate body and the second plate body, and the chamber is connected to the plurality of water outlets.

[0027] The present invention further provides a dishwasher, comprising the spray arm and a shell as described above, wherein the spray arm is connected to the shell.

[0028] In the technical solution of the present invention, the projection of the water curtain sprayed by at least one nozzle in the first plane is designed to be fan-shaped. Since the fan-shaped water curtain has a wider coverage area, compared with the thin water column type spray water curtain in the related art, it can expand the washable range in the dishwasher and improve the cleaning effect of the items to be washed in the dishwasher; at the same time, the impact force of the fan-shaped water curtain gradually decreases from the center to the periphery, which can reduce the difference in the cleaning effect of the center and periphery of the fan-shaped water curtain on the items to be washed placed in various areas of the dishwasher, and achieve cleaning uniformity. The projections of the water curtains sprayed by two adjacent nozzles in the first plane have an overlapping area, which further increases the water flow coverage area of ​​the spray arm, avoids washing dead corners, and makes the washing effect of the dishwasher better. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a spray arm provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the spray arm body in the spray arm shown;

[0032] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure in the middle CC orientation;

[0033] Figure 4 for Figure 1 The schematic diagram of the use effect of the spray arm shown;

[0034] Figure 5 A schematic diagram of the three-dimensional structure of an embodiment of a spray head in a spray arm provided in an embodiment of the present application;

[0035] Figure 6 for Figure 5 A schematic diagram of a cross-sectional structure of the nozzle in the BB direction is shown;

[0036] Figure 7 A schematic diagram of the three-dimensional structure of another embodiment of a spray head in a spray arm provided in an embodiment of the present application;

[0037] Figure 8 for Figure 7 A schematic diagram of the side view structure of the nozzle shown;

[0038] Fig. 9 for Figure 7 A schematic diagram of a cross-sectional structure of the nozzle in the DD position is shown;

[0039] Fig.10 for Figure 7 A schematic cross-sectional structure diagram of an alternative solution of the nozzle in the DD position is shown;

[0040] Fig.11 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Explanation of the accompanying drawings: 100, spray arm; 110, spray arm body; 111, first plate body; 112, water outlet; 113, second plate body; 114, peripheral side plate; 1141, first structural part; 1142, second structural part; 115, chamber; 120, nozzle; 121, injection channel; 1211, first channel; 1212, second channel; 1212a, first surface; 1212b, second surface; 1213, third channel; 122, first part; 123, second part; a, first plane; b, first direction; d, first axis. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] In the related art, when a dishwasher is in use, it can only clean items to be cleaned stored in a small area, and the cleaning effect needs to be improved.

[0048] To solve the above problems, please refer to Figure 1 The embodiment of the present application provides a spray arm 100, which is disposed in a dishwasher (not shown in the figure). The spray arm 100 may include a spray arm body 110 and a plurality of spray heads 120, wherein the spray heads 120 are connected to the spray arm body 110 and communicate with the spray arm body 110, so that liquid can reach the spray heads 120 from the spray arm body 110 and be sprayed by the spray heads 120 to clean the items to be cleaned in the dishwasher.

[0049] Please refer to Figure 2 , Figure 2 for Figure 1 The three-dimensional schematic diagram of the spray arm body 110 in the spray arm 100 is shown, combined with Figure 2 The spray arm body 110 may include a first plate body 111, and a plurality of water outlet holes 112 are formed on the first plate body 111, so that the spray arm body 110 discharges water from the side where the first plate body 111 is located. In this way, when the spray arm 100 is used in a dishwasher, the first plate body 111 of the spray arm body 110 can be arranged toward the objects to be cleaned in the dishwasher to achieve cleaning of the objects to be cleaned.

[0050] Optionally, a plurality of water outlet holes 112 may be arranged at intervals on the first plate body 111 , such as arranged at intervals in the length direction of the first plate body 111 , so that water jetted through different water outlet holes 112 can clean objects to be cleaned in different areas.

[0051] Combination Figure 1 to Figure 2 Each nozzle 120 can be respectively arranged corresponding to a water outlet 112, so that the water flow sprayed through each water outlet 112 can be output at high pressure under the action of each nozzle 120, thereby improving the cleaning rate of the items to be cleaned in the dishwasher.

[0052] Specifically, see Figure 3 , Figure 3 for Figure 1 In the cross-sectional schematic diagram along the CC direction, each nozzle 120 is formed with a jet channel 121, and the jet channel 121 of each nozzle 120 is respectively connected to the corresponding water outlet 112, so that water flows through the water outlet 112 to the jet channel 121, and then is sprayed from the jet channel 121 to clean the items to be cleaned.

[0053] See also Figure 4 , the projection of the water curtain sprayed by at least one of the two adjacent nozzles 120 in the first plane a is fan-shaped. It can be understood that the spraying area of ​​the fan-shaped water curtain is larger, and it can clean the objects to be cleaned in a larger area. Among them, the first plane a can be a virtual plane parallel to the rotation axis of the spray arm 100, which is not limited to this.

[0054] Furthermore, to avoid the water curtains sprayed by two adjacent nozzles 120 being too far apart, so that there is a blind area between the spraying areas of the two adjacent nozzles 120, the projections of the water curtains sprayed by the two adjacent nozzles 120 in the first plane a may have an overlapping area.

[0055] In summary, the spray arm 100 provided in the embodiment of the present application is designed to project the water curtain sprayed by at least one nozzle 120 in the first plane a in a fan-shaped manner. Since the fan-shaped water curtain has a wider coverage area, compared with the thin water column-type spray water curtain in the related art, it can expand the washable range in the dishwasher and improve the cleaning effect of the items to be washed in the dishwasher; at the same time, the impact force of the fan-shaped water curtain gradually decreases from the center to the periphery, which can reduce the difference in the cleaning effect of the center and periphery of the fan-shaped water curtain on the items to be washed placed in various areas of the dishwasher, and achieve cleaning uniformity. The projections of the water curtains sprayed by two adjacent nozzles 120 in the first plane a have an overlapping area, which further increases the water flow coverage area of ​​the spray arm 100, avoids washing dead corners, and makes the cleaning effect of the spray arm 100 better.

[0056] It should be noted that the spray arm 100 in the embodiment of the present application can use tap water, detergent or other fluids to form a spray water curtain, and there is no limitation on this.

[0057] For further information, please refer to Figure 4 , the projection of the water curtain sprayed by each nozzle 120 on the first plane a can be fan-shaped, and the projection area of ​​multiple fans on the first plane a is larger, and the area that can be covered in the dishwasher will also increase accordingly. Furthermore, the projection of the water curtain sprayed by each two adjacent nozzles 120 on the first plane a can have an overlapping area. This design increases the area of ​​the overlapping area of ​​the water curtains ejected by the two adjacent nozzles 120, further increasing the coverage of the water curtain, and the water curtain in the overlapping area sprays two layers of water curtains on the items to be cleaned at the same time, thereby achieving secondary cleaning, effectively preventing the generation of washing dead corners, and also enhancing the washing effect of the spray arm 100 and improving the cleaning efficiency.

[0058] In some embodiments, please refer to Figures 4 to 6 The injection channel 121 may include a first channel 1211 and a second channel 1212. The first channel 1211 is arranged near the water outlet 112 and one end is connected to the water outlet 112, and the other end extends in a direction away from the water outlet 112. The second channel 1212 is arranged on a side of the first channel 1211 away from the water outlet 112 and is connected to the first channel 1211. The second channel 1212 also penetrates the surface of the nozzle 120 away from the water outlet 112, so that the water flow can be ejected from the second channel 1212. The maximum width of the second channel 1212 in the first direction b is less than the minimum width of the first channel 1211 in the first direction b. The first direction b is perpendicular to the first plane a, so that when the water flow flows from the first channel 1211 to the second channel 1212, the water column is subjected to the resistance of two surfaces of the second channel 1212 that are relatively distributed along the first direction b, and the flow direction changes, so that the projection of the water curtain ejected by the second channel 1212 in the first plane a can be fan-shaped.

[0059] For further information, please refer to Figure 6 , along the water flow transmission direction, the width of the first channel 1211 in the first direction b can be gradually reduced, so that the water flow gradually becomes flat, in preparation for the emission of a fan-shaped water curtain. Furthermore, along the water flow transmission direction, the cross-sectional area of ​​the first channel 1211 can be gradually reduced. Since the flow rate of the water flow remains unchanged, the path of the water flow gradually narrows, which can increase the flow rate of the water flow when it is ejected from the injection channel 121, making the impact force of the ejected water flow stronger, thereby enhancing the washing effect, better removing stains on the items to be cleaned, and improving the cleanliness of the items to be cleaned.

[0060] It is understandable that the inner diameter of the end of the first channel 1211 away from the water outlet 112 can be set as small as possible so that the sprayed water flow can meet the required spray pressure. At the same time, when there is residue falling on the nozzle 120, sufficient water flow spray pressure can wash away the residue to prevent the residue from clogging the nozzle 120.

[0061] In some embodiments, please refer to Figure 5 to Figure 6 The inner wall surface of the first channel 1211 can be a frustum with a gradually decreasing inner diameter. This design can gradually increase the pressure of the water flow and reduce the resistance of the inner wall to the water flow.

[0062] Optionally, the nozzle 120 may include a third portion forming the first channel 1211, and the third portion may be roughly thin-walled, so that the structure of the nozzle 120 is simple, the consumables are less, and the manufacturing cost is low. Further optionally, the thickness of each part of the third portion of the nozzle 120 forming the first channel 1211 may be relatively uniform, so that the structural strength of each part of the third portion is roughly equal. Specifically, when the inner wall surface of the first channel 1211 is a frustum with a gradually decreasing inner diameter, that is, when the inner wall surface of the third portion is a frustum with a gradually decreasing inner diameter, the outer wall surface of the third portion may also be a frustum with a gradually decreasing inner diameter.

[0063] The nozzle 120 may include a first portion 122 and a second portion 123, wherein the first portion 122 and the second portion 123 are spaced apart and a second channel 1212 is formed therebetween. Figure 5 and Figure 6 The first part 122 and the second part 123 can be two thin plate-like structures extending in a direction away from the water outlet 112. This design structure is simple and saves materials. Figures 7 to 9 The first portion 122 and the second portion 123 may also be roughly spherical structures, so that the third portion, the first portion 122 and the second portion 123 of the nozzle 120 have better structural fluidity and better aesthetics.

[0064] Optionally, the projection of the contour line of the water outlet of the second channel 1212 in the first plane a can be convex in the direction away from the first channel 1211, so that the contour line of the water outlet of the second channel 1212 is roughly arched, which is conducive to the spraying of a fan-shaped water curtain at the second channel 1212. Such a design can improve the structural strength of the nozzle 120, avoid damage to the second channel 1212 due to water impact, and make the nozzle 120 more durable.

[0065] In some other embodiments, please refer to Fig.10The injection channel 121 may also include a third channel 1213, which is connected between the first channel 1211 and the second channel 1212. Along the transmission direction of the water flow, the width of the third channel 1213 in the first direction b gradually decreases, which can play a role in buffering the water flow.

[0066] Furthermore, the inner wall surface of the third channel 1213 may bulge in a direction away from the first channel 1211. Fig.10 Along the water flow transmission direction, the inner wall surface of the third channel 1213 can be a hemispherical surface with a gradually decreasing inner diameter. Since the flow velocity pressure of the water flow after flowing through the first channel 1211 is relatively large, in order to avoid pressure damage to the second channel 1212, the inner wall surface of the third channel 1213 connected between the first channel 1211 and the second channel 1212 is designed to be a hemispherical surface with a gradually decreasing inner diameter, so that the water flow has a buffer area at the third channel 1213, reducing the impact force of the water flow on the second channel 1212, avoiding damage to the second channel 1212, and thus increasing the service life of the nozzle 120. At the same time, the connection from the first channel 1211 to the third channel 1213 is smooth, reducing the resistance of the water flow, so that the water flow can be ejected more smoothly.

[0067] It should be noted that when the first part 122 and the second part 123 are substantially in a dome-shaped structure, the third channel 1213 can be formed on the first part 122 and the second part 123 by digging grooves, etc., so that the first part 122 and the second part 123 are substantially in a thin-walled structure. Preferably, the thickness of each part of the first part 122 can be relatively uniform, so that the structural strength of each part of the first part 122 is substantially the same. Optionally, the thickness of each part of the second part 123 can be relatively uniform, so that the structural strength of each part of the second part 123 is substantially the same.

[0068] Understandably, please refer to Fig.10 , along the water flow transmission direction, the sum h1 of the height of the third channel 1213 and the second channel 1212 can be greater than or equal to 3mm and less than or equal to 6mm. The sum h1 of the height of the third channel 1213 and the second channel 1212 is designed to be greater than or equal to 3mm in order to reserve sufficient channel height so that the water flow changes its flow direction and is fan-shaped when it is ejected through the second channel 1212; the sum h1 of the height of the third channel 1213 and the second channel 1212 is designed to be less than or equal to 6mm, which can prevent the nozzle 120 from being too large and affecting the operation of other components in the dishwasher, and is also conducive to the miniaturization design of the dishwasher.

[0069] Understandably, please refer to Figure 3The inner wall surface of the second channel 1212 may include a first surface 1212a and a second surface 1212b that are relatively distributed along the first direction b, and the first surface 1212a and the second surface 1212b are both planes and parallel to each other. Since the first surface 1212a and the second surface 1212b are both planes and parallel to each other, the water flow can be sprayed out in a divergent form under the guidance of the first surface 1212a and the second surface 1212b, so as to achieve the effect that the projection of the sprayed water curtain in the first plane a is fan-shaped.

[0070] Furthermore, the first surface 1212a and the second surface 1212b may be arranged at an angle with the first plate 111. The first surface 1212a and the second surface 1212b are designed to be arranged at an angle with the first plate 111, so that the sprayed water curtain is inclined, and more water curtains can be sprayed to the objects to be cleaned than a vertical water curtain, and the water flow pressure can have more impact on the objects to be cleaned in the dishwasher, thereby enhancing the cleaning effect of the spray arm 100.

[0071] Furthermore, the distance between the first surface 1212 a and the second surface 1212 b may be greater than the aperture of the residue filter in the dishwasher to prevent smaller residues from passing through the residue filter into the second channel 1212 and clogging the nozzle 120 .

[0072] Preferably, the water curtains sprayed by two adjacent nozzles 120 can be located in different planes. This design can prevent the edges of the fan-shaped water curtains emitted by the two adjacent nozzles 120 from impacting each other and causing a weakening of the cleaning effect, so that the impact force of the fan-shaped water curtain acts more on the items to be cleaned; and the water curtains are located in different planes, not only the coverage of the water curtains is larger, but also the water flow in the overlapping area of ​​the water curtains is equivalent to repeated cleaning of the items to be cleaned, and the superimposed water flow impact force of the two layers of water curtains is also greater, so that the cleaning effect is better.

[0073] For details, please refer to Fig.11 , the projections of two adjacent nozzles 120 along the length direction of the first plate body 111 to the second plane can be set to be non-overlapping, wherein the second plane is perpendicular to the first plane a, so that the water curtains sprayed by the two adjacent nozzles 120 are ejected from different planes. Alternatively, the angles between the first surface 1212a and the second surface 1212b of the two adjacent nozzles 120 and the first plate body 111 are set to different angles, so that the sprayed water curtains are located in different planes. Preferably, the plurality of nozzles 120 can be distributed in a staggered manner on the first plate body 111, and the angles between the first surface 1212a and the second surface 1212b of each nozzle 120 and the first plate body 111 are different.

[0074] It can be understood that the distance between the projections of two adjacent nozzles 120 on the first plane a can be less than or equal to 30 mm. By limiting the distance between the projections of two adjacent nozzles 120 on the first plane a to be less than or equal to 30 mm, it is avoided that the projections of the edges of the fan-shaped water curtain on the first plane a do not overlap due to the distance between the two adjacent nozzles 120 being too far, and it is ensured that the fan-shaped water curtains sprayed by the two adjacent nozzles 120 have an overlapping area effect, so that the coverage range of the water curtain ejected by the spray arm 100 is wider.

[0075] Please refer to Figure 3 The spray arm body 110 may further include a second plate body 113 and a peripheral side plate 114. The second plate body 113 is spaced apart from the first plate body 111. The peripheral side plate 114 is located between the first plate body 111 and the second plate body 113 and connects the first plate body 111 and the second plate body 113. A chamber 115 is formed between the peripheral side plate 114, the first plate body 111 and the second plate body 113, and the chamber 115 is connected to the plurality of water outlet holes 112.

[0076] Furthermore, the first plate 111 of the spray arm body 110 can bulge in a direction away from the second plate 113 and have a certain curvature, so that when the multiple nozzles 120 are connected to various parts of the first plate 111 along the length direction of the spray arm body 110, the multiple nozzles 120 are arranged in an undulating manner, and the water curtain sprayed by the nozzles 120 can be sprayed onto the higher and lower items to be cleaned in the dishwasher at the same time.

[0077] Optionally, the first plate 111 and the nozzle 120 can be integrally formed. When assembling the spray arm 100, the integral structure formed by the first plate 111 and the nozzle 120 can be assembled with the peripheral side plate 114 and the second plate 113 to save assembly process and improve assembly efficiency.

[0078] Optionally, the peripheral side plate 114 may include a first structural portion 1141 connected to the first plate body 111 and arranged around the periphery of the first plate body 111, and a second structural portion 1142 connected to the second plate body 113 and arranged around the periphery of the second plate body 113. The first structural portion 1141 may be integrally formed with the first plate body 111, and the second structural portion 1142 may be integrally formed with the second plate body 113, so that when assembling the spray arm 100, the integral structure formed by the first structural portion 1141 and the first plate body 111 and the integral structure formed by the second structural portion 1142 and the second plate body 113 may be assembled, thereby saving assembly process and improving assembly efficiency. At the same time, the first structural portion 1141 and the first plate body 111 form an integral structure, which can improve the structural stability of the first plate body 111 compared to the independent arrangement of the first plate body 111. Likewise, the second structure portion 1142 and the second plate body 113 form an integral structure, which can improve the structural stability of the second plate body 113 compared to the second plate body 113 being independently provided.

[0079] Optionally, the nozzle 120 can also be formed independently, so that the nozzle 120 can be assembled with the spray arm body 110 after being formed, wherein a detachable connection can be selected between the nozzle 120 and the spray arm body 110, so that when the nozzle 120 is blocked or damaged, only the damaged nozzle 120 can be replaced, which is easy to maintain.

[0080] In some embodiments, the spray arm body 110 may be provided with one of the grooves or protrusions, and the portion of the spray head 120 near the water outlet 112 may be provided with the other of the grooves or protrusions, so that the spray arm body 110 and the spray head 120 can be connected by the grooves and protrusions. Further, one of the grooves or protrusions can be provided on the inner wall surface of the water outlet 112 of the spray arm body 110, and the other can be provided on the portion of the spray head 120 extending into the water outlet 112, so that the connection between the spray head 120 and the water outlet 112 is tighter and more secure. In other embodiments, the spray head 120 can be partially provided in the water outlet 112 and have an interference fit with the water outlet 112, so that the spray head 120 is more firmly stuck in the water outlet 112. It can be understood that the spray arm body 110 and the spray head 120 can be made of at least one of plastic, ceramic or metal materials.

[0081] Understandably, please refer to Figure 4 , the spray arm body 110 can rotate around the first axis d, and the first axis d is parallel to the first plane a. The spray arm body 110 can rotate around the first axis d, so that the water curtain ejected by the spray arm 100 will form a solid cylindrical water curtain as the spray arm body 110 rotates, and centrifugal force will be generated as the spray arm body 110 rotates. The water flow will flow to a farther distance under the action of the centrifugal force, not only flushing the items to be cleaned, but also flushing every corner of the dishwasher tank, achieving 360° all-round washing without dead angles, avoiding any possible spray dead angles in the dishwasher, and further improving the washing efficiency of the dishwasher.

[0082] The present invention also provides a dishwasher, which includes the above-mentioned spray arm 100 and a housing, and the spray arm 100 is connected to the housing. In the dishwasher in the technical solution of the present invention, the projection of the water curtain sprayed by at least one nozzle 120 in the first plane a is designed to be fan-shaped. Since the fan-shaped water curtain has a wider coverage area, compared with the thin water column spray water curtain in the related art, the washable range in the dishwasher can be expanded, and the cleaning effect of the items to be washed in the dishwasher can be improved; at the same time, the impact force of the fan-shaped water curtain gradually decreases from the center to the periphery, which can reduce the difference in the cleaning effect of the center and periphery of the fan-shaped water curtain on the items to be washed placed in various areas of the dishwasher, and achieve cleaning uniformity. The projections of the water curtains sprayed by two adjacent nozzles 120 in the first plane a have an overlapping area, which further increases the water flow coverage area of ​​the spray arm 100, avoids washing dead corners, and makes the washing effect of the dishwasher better. At the same time, the spray arm 100 has a simple structure, is easy to process and form, saves costs and is conducive to mass production.

[0083] It should be noted that the number of nozzles 120 can be specifically set according to the actual spray range covered by the dishwasher. For example, the number of nozzles 120 can be determined according to the size of the dishwasher to comprehensively cover all spray ranges in the dishwasher.

[0084] When the spray arm body 110 can rotate around the first axis d, the dishwasher can further include a driving member, which is used to drive the spray arm body 110 to rotate around the first axis d. The driving member can be a motor, etc., which is not limited in the embodiment of the present application.

[0085] Please refer to Figure 4 The dishwasher may further include a water inlet pipe 210 , which is communicated with the water inlet hole of the spray arm 100 and is used to transport water to the spray arm 100 . The water inlet pipe 210 is also connected to the housing.

[0086] In some embodiments, the chamber 115 of the spray arm body 110 of the spray arm 100 can be connected to the water inlet pipe 210 so that the water inlet pipe 210 transports water to the water outlet 112. This design structure is simple and the water inlet pipe 210 can supply water to multiple nozzles 120 at the same time.

[0087] For further information, please refer to Figure 4 When the spray arm body 110 can rotate around the first axis d, the water inlet pipe 210 can be arranged at the first axis d of the spray arm body 110. It can be understood that the central axis of the water inlet pipe 210 coincides with the first axis d, so as to avoid the entanglement problem of the water pipeline connected to the water inlet pipe 210 during the rotation of the spray arm body 110. Furthermore, the water inlet pipe 210 and the water pipeline can be rotatably connected, so that when the spray arm body 110 and the water inlet pipe 210 rotate around the first axis d, the water pipeline will not rotate with the water inlet pipe 210, so as to ensure the smooth development of water delivery work.

[0088] In other embodiments, the water inlet pipe 210 may include a plurality of pipes, the number of which may be the same as the number of the water outlet holes 112, and the plurality of pipes may pass through the chamber 115 and directly communicate with the water outlet holes 112 one by one, so that the water flow path is shorter and is conducive to the rapid output of the water flow. At the same time, the water output may be controlled by opening some pipes. When there are fewer items to be cleaned, only some pipes may be opened to deliver water, so as to achieve a more water-saving and environmentally friendly cleaning effect.

[0089] In order to ensure that the position above the center of the high objects to be cleaned is within the spraying range of the water curtain and the projection of the water curtain sprayed by the nozzle 120 in the first plane a has an overlapping area, preferably, the angle of the fan-shaped water curtain sprayed by the nozzle can be greater than or equal to 13°.

[0090] When the dishwasher is working: the spray arm 100 is started, the water inlet pipe 210 provides water flow to the spray arm 100, the water flows through the water outlet 112 to the nozzle 120, and then is sprayed out at the nozzle 120 in the form of a fan-shaped water curtain to clean the items to be cleaned. The multiple overlapping fan-shaped water curtains sprayed by the multiple nozzles 120 cover the items to be cleaned as comprehensively as possible. At the same time, the spray arm 100 starts to rotate to form a solid cylindrical water curtain, which simultaneously flushes the items to be cleaned and the inner wall of the dishwasher, and performs all-round flushing without dead ends.

[0091] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A spray arm, characterized in that: include: A spray arm body, the spray arm body comprising a first plate body, a plurality of water outlet holes being formed on the first plate body; A plurality of nozzles, each of which is formed with a spray channel, each of which corresponds to one of the water outlet holes and is connected to the spray arm body, and the spray channel of each nozzle is connected to the corresponding water outlet hole; Among the two adjacent nozzles, the projection of the water curtain sprayed by at least one of the nozzles in the first plane is fan-shaped, and the projections of the water curtains sprayed by the two adjacent nozzles in the first plane have an overlapping area.

2. The spray arm according to claim 1, characterized in that: The projections of the water curtains sprayed by each of the nozzles on the first plane are all fan-shaped, and the projections of the water curtains sprayed by every two adjacent nozzles on the first plane have an overlapping area.

3. The spray arm according to claim 1, characterized in that: The injection channel comprises: A first channel, which is arranged near the water outlet and has one end connected to the water outlet and the other end extending in a direction away from the water outlet; A second channel is arranged on a side of the first channel away from the water outlet and is connected to the first channel. The second channel runs through the surface of the nozzle away from the water outlet. The maximum width of the second channel in the first direction is smaller than the minimum width of the first channel in the first direction, and the first direction is perpendicular to the first plane.

4. The spray arm according to claim 3, characterized in that: The projection of the contour line of the water outlet of the second channel in the first plane is convex in a direction away from the first channel; and / or Along the water flow transmission direction, the width of the first channel in the first direction gradually decreases; and / or The inner wall surface of the second channel includes a first surface and a second surface that are oppositely distributed along the first direction, and the first surface and the second surface are both planes and parallel to each other.

5. The spray arm according to claim 3, characterized in that: The injection channel also includes: The third channel is connected between the first channel and the second channel, and along the water flow transmission direction, the width of the third channel in the first direction gradually decreases.

6. The spray arm according to claim 5, characterized in that: Along the water flow transmission direction, the inner wall surface of the first channel is a frustum surface with a gradually decreasing inner diameter; Along the water flow transmission direction, the inner wall surface of the third channel is a hemispherical surface with a gradually decreasing inner diameter.

7. The spray arm according to claim 5 or 6, characterized in that: Along the water flow transmission direction, the sum of the heights of the third channel and the second channel is greater than or equal to 3 mm and less than or equal to 6 mm.

8. The spray arm according to claim 1, characterized in that: The water curtains sprayed by two adjacent nozzles are located in different planes respectively; and / or The distance between the projections of two adjacent nozzles on the first plane is less than or equal to 30 mm; and / or The spray arm body can rotate around a first axis, and the first axis is parallel to the first plane.

9. The spray arm according to claim 1, characterized in that: The spray arm body also includes: A second plate body, spaced apart from the first plate body; The peripheral side plate is located between the first plate body and the second plate body and connects the first plate body and the second plate body. A chamber is formed between the peripheral side plate, the first plate body and the second plate body, and the chamber is connected to the plurality of water outlets.

10. A dishwasher, characterized in that: include: The spray arm as claimed in any one of claims 1 to 9; A shell, wherein the spray arm is connected to the shell.

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