Dishwasher

Abstract

The application discloses a dishwasher, comprising an inner container and a spraying arm. The spraying arm is arranged in a washing cavity of the inner container, and comprises a connecting shaft, a shell and a flow guide part. The connecting shaft is connected with a water inlet pipe and the shell, and the shell is internally provided with a water storage cavity. The flow guide part is connected with the shell and located in the water storage cavity, and extends at least partially to a spraying hole of the shell. The outer circumferential surface of the flow guide part is spaced from the hole wall surface of the spraying hole, so that an annular water outlet is formed between the flow guide part and the spraying hole. In the dishwasher disclosed by the application, when the flow guide part extends to the spraying hole, the caliber of the spraying hole is reduced, the water flowing out of the spraying hole is pressurized, and the cleaning effect of the water flow on tableware is improved. Moreover, the annular water outlet formed by the spraying hole and the flow guide part can make the water flow spread in an annular shape and be sprayed out, the spraying range of the water flow is increased, tableware located at a position difficult to clean in the washing cavity can be cleaned, and the cleaning effect of the dishwasher on tableware is improved.

Description

Technical Field

[0001] This application relates to the field of dishwashing technology, and more particularly to a dishwasher. Background Technology

[0002] With the development of technology, dishwashers have gradually entered people's lives. Related technologies typically include spray-type dishwashers and ultrasonic dishwashers. Ultrasonic dishwashers clean dishes using ultrasonic waves, but are more expensive. Spray-arm dishwashers, on the other hand, clean dishes by placing them in the washing chamber and having water sprayed out by spray arms installed within the chamber. It's clear that in a spray-type dishwasher, the spray arms play a primary role in cleaning. However, when the water flow from the spray arms is directly from the nozzles, it may be affected by the water pressure of the incoming water, resulting in lower water pressure and affecting the cleaning effect. Furthermore, if the water pressure is too low, the spray area may be small, failing to cover dishes placed in different positions within the dishwasher, further impacting the cleaning performance. Utility Model Content

[0003] This application discloses a dishwasher that increases the water pressure sprayed from the spray arm in the dishwasher, thereby improving the cleaning effect on the tableware inside the dishwasher.

[0004] To achieve the above objectives, this application discloses a dishwasher, comprising: The inner tank has a washing chamber, and the washing chamber is equipped with a water inlet pipe; A spray arm is disposed inside the washing chamber; The spray arm includes: A connecting shaft, one end of which is connected to the water inlet pipe; A housing is connected to the other end of the connecting shaft. A water storage cavity is formed inside the housing, and the water storage cavity is connected to the water inlet pipe through the connecting shaft. A spray hole connected to the water storage cavity is provided on the side of the housing opposite to the other end of the connecting shaft. The spray arm also includes: A flow guide is connected to the housing and located in the water storage cavity. The flow guide extends at least partially into the spray hole, and the outer peripheral surface of the flow guide is spaced apart from the hole wall surface of the spray hole so that an annular water outlet is formed between the flow guide and the hole wall surface of the spray hole. The annular water outlet is configured to pressurize and spray water out of the water storage cavity.

[0005] This application discloses a dishwasher that, by providing a guide section in the water storage chamber of the spray arm, and the guide section extending at least partially to the spray nozzle located on the housing, allows water in the water storage chamber to be guided to the spray nozzle. Since the guide section extends to the spray nozzle, its presence reduces the nozzle's diameter, allowing the water flowing out through the nozzle and guide section to be pressurized at the smaller diameter nozzle, thereby increasing the water flow velocity and enabling the water sprayed from the spray arm to effectively clean the dishes in the washing chamber. Furthermore, because the guide section forms an annular outlet between the spray nozzle and the spray nozzle, this annular outlet allows the water to be sprayed out in an annular pattern, effectively increasing the spray range of the water sprayed through the nozzle. This allows the dishwasher to better clean dishes located in hard-to-reach areas of the washing chamber, thus improving the dishwasher's cleaning effect.

[0006] As some alternative implementations, the housing includes: The first side is connected to the other end of the connecting shaft; The second side is disposed opposite to the first side, and the spray holes are provided on the second side; The guide portion is connected to the first side and extends in the direction from the first side to the second side, so as to be at least partially located in the spray hole. The cross-sectional area of ​​the guide portion connected to the first side is greater than the cross-sectional area of ​​the guide portion located in the spray hole.

[0007] When setting up the flow guide, the end with the larger cross-sectional area is connected to the first side, while the other end with the smaller cross-sectional area extends towards the second side and is partially located in the spray hole. In this way, the end with the larger cross-sectional area can form a stable connection with the first side of the shell, thereby withstanding the impact of water flow in the water storage chamber. The end with the smaller cross-sectional area is located in the flow guide hole, which can increase the pressure of water sprayed from the spray hole while reducing the impact of clogging on the spray hole, thus preventing situations that affect the normal water output from the spray hole.

[0008] As some alternative implementations, the cross-sectional area of ​​the guide portion gradually decreases along the direction from the first side to the second side, so that the portion of the guide portion in the spray hole is constructed as a tip.

[0009] The guide section is shaped such that its cross-sectional area gradually decreases from the first side to the second side, and the portion of the guide section within the spray hole is designed as a pointed tip. Therefore, when water flows to the end of the guide section with the larger cross-sectional area, the water can flow along the guide section from the first side to the second side, reaching the spray hole and being pressurized and ejected from it. In other words, designing the guide section to gradually decrease in size from the first side to the second side effectively guides the water flow towards the spray hole. Furthermore, when the water flows out of the spray hole along the guide section, the pointed guide section within the spray hole reduces obstruction, allowing the water to diffuse more effectively outwards along the annular outlet.

[0010] As some alternative implementations, the outer peripheral surface of the guide portion is constructed as a concave arc surface.

[0011] To improve water flow guidance and facilitate better water ejection from the spray nozzles, this application constructs the outer peripheral surface of the guide section as a concave arc surface. When water impacts the guide section at a high velocity, a convex arc surface on its outer peripheral surface could cause the water to bounce back, making it difficult for the guide section to direct the water flow along its outer peripheral surface to the spray nozzles. Furthermore, the backflow could disrupt the water flow within the storage chamber, further affecting the normal spraying of water from the spray nozzles. Therefore, this application constructs the outer peripheral surface of the guide section as a concave arc surface, effectively buffering the velocity of the water reaching the guide section, thus facilitating the guidance of the water flow along the outer peripheral surface of the guide section to the spray nozzles, improving the smoothness of the water flow from the spray nozzles.

[0012] As some alternative implementations, the flow guide is integrally formed into the housing; and / or, The housing connected to one side of the connecting shaft includes: The first surface is connected to the connecting shaft; The second surface is located in the water storage cavity, and the first surface is recessed towards the second surface to protrude on the second surface to form the flow guide.

[0013] In this application, the flow guide is integrally formed with the shell, which simplifies the assembly of the flow guide on the shell. This allows the flow guide to be integrally formed during the manufacturing of the shell, and the integral forming method can effectively improve the reliability and stability of the connection between the flow guide and the shell.

[0014] The housing is connected to the connecting shaft on one side, including a first surface and a second surface. The second surface protrudes to form a guide section, making the guide section integrally formed with the housing. This avoids installation gaps between the guide section and the housing during installation, preventing leakage from the water storage chamber. Furthermore, reducing installation gaps enhances the stability of the guide section's installation on the housing, preventing it from being detached due to water flow from the water storage chamber.

[0015] As some alternative embodiments, the housing is elongated, and the plurality of spray holes are arranged at intervals along the length of the housing; Wherein, along the length direction of the housing, among the plurality of spray holes, the spray hole located in the middle of the housing is constructed as a central hole, and the remaining spray holes are edge holes. The central hole is opened along a first direction, and the opening direction of the edge holes is inclined relative to the first direction. The first direction is orthogonal to the length direction of the shell.

[0016] To enhance the spray coverage of the spray arm, the casing is typically elongated, with multiple spray nozzles along its length, effectively increasing the spray range. Furthermore, while the central hole in the middle of the casing sprays water in a first direction, the opening directions of the edge holes on either side of the central hole are inclined relative to the central hole's opening direction. This allows the edge holes to spray water in a different direction than the central hole, cleaning tableware that the central hole cannot reach, thereby further increasing the spray cleaning range of the spray arm.

[0017] As some alternative implementations, the housing includes: The first side is connected to the other end of the connecting shaft; The second side is disposed opposite to the first side, and the second side is provided with the spray hole, wherein the opening direction of the edge holes located on both sides of the central hole is away from the central hole; and / or, The opening direction of the edge hole forms an angle α with the first direction, satisfying: 0° < α < 50°.

[0018] When setting the orientation of the spray holes, the opening direction of the edge holes is set to be away from the direction of the middle hole. That is, the orientation of the edge holes on both sides of the middle hole is away from the middle hole, so that the spray from the edge holes spreads outward, which can expand the spray range of the spray arm and improve the cleaning effect on the tableware in different positions in the washing chamber.

[0019] Furthermore, when setting the opening direction of the edge holes, setting the opening direction of the edge holes at an angle to the first direction, when the angle α is 0°, that is, the opening direction of the edge holes is parallel to the first direction, cannot effectively increase the spray range of the spray arm. When the angle α > 50°, on the one hand, if the edge holes are tilted outwards, although the spray range will be increased, the tilt angle is too large, which may make it difficult for the spray holes to accurately spray and clean the tableware in the washing chamber; on the other hand, if the edge holes are tilted inwards, that is, the spray holes are spraying towards the middle hole, which may cause the spray to be too concentrated, affecting the spray range of the spray arm. Therefore, this application controls the angle α within 0°-50°, which can effectively increase the spray range of the spray arm while also improving the accuracy of the spray cleaning.

[0020] As some alternative implementations, the extension direction of the flow guide located in the edge hole is parallel to the opening direction of the edge hole.

[0021] When water flows through the storage chamber and reaches the edge hole, the opening direction of the edge hole is inclined, and the extension direction of the guide section located at the edge hole is parallel to the opening direction of the edge hole; that is, the extension direction of the guide section located at the edge hole is also inclined. This allows the guide section to accurately guide the water flow along the opening direction of the edge hole, which helps improve the accuracy of the spray cleaning.

[0022] As some alternative implementations, the spray hole is a circular hole, and the outer peripheral surface of the guide portion and the hole wall surface of the spray hole have a distance d along the radial direction of the spray hole, satisfying: 1mm < d < 4mm.

[0023] This application sets the distance d between the outer peripheral surface of the guide section and the wall surface of the spray hole to 1mm-4mm. On the one hand, it avoids a distance d < 1mm, as a small distance may result in insufficient space for water to flow from the annular outlet, affecting the smoothness of the water flow. On the other hand, it avoids a distance d > 4mm, as a large distance may affect the pressurization effect of the water flow when it exits the spray hole, resulting in insufficient water pressure, which is not conducive to cleaning tableware. In other words, by controlling the distance d to 1mm-4mm, this application can ensure that the water flows smoothly from the spray hole while maintaining water pressure, which is beneficial for cleaning tableware in the washing chamber.

[0024] As some alternative implementations, the diameter of the spray hole is D, which satisfies: 4mm < D < 20mm.

[0025] This application controls the nozzle diameter D of the spray hole within the range of 4mm-20mm. On one hand, it avoids a nozzle diameter D < 4mm. If the nozzle diameter D is too small, the diffusion range of the annular outlet formed by the spray hole and the guide section is small, which is not conducive to cleaning a large area of ​​tableware in the washing chamber. On the other hand, it avoids a nozzle diameter D > 20mm. If the nozzle diameter D is too large, it is difficult to increase the pressure of the water flow sprayed from the spray hole by setting the guide section at the spray hole, resulting in poor pressurization effect. Therefore, this application controls the nozzle diameter within the range of 4mm-20mm, which maintains the pressurization effect of the spray hole on the water flow while increasing the diffusion range of the water flow, thus improving the cleaning effect on tableware.

[0026] Compared with the prior art, this application has at least the following beneficial effects: This application discloses a dishwasher that, by providing a guide section in the water storage chamber of the spray arm, and the guide section extending at least partially to the spray nozzle located on the housing, allows water in the water storage chamber to be guided to the spray nozzle. Since the guide section extends to the spray nozzle, its presence reduces the nozzle's diameter, allowing the water flowing out through the nozzle and guide section to be pressurized at the smaller diameter nozzle, thereby increasing the water flow velocity and enabling the water sprayed from the spray arm to effectively clean the dishes in the washing chamber. Furthermore, because the guide section forms an annular outlet between the spray nozzle and the spray nozzle, this annular outlet allows the water to be sprayed out in an annular pattern, effectively increasing the spray range of the water sprayed through the nozzle. This allows the dishwasher to better clean dishes located in hard-to-reach areas of the washing chamber, thus improving the dishwasher's cleaning effect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a partial structural schematic diagram of the dishwasher disclosed in an embodiment of this application; Figure 2 This is an exploded view of the dishwasher disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the spray arm of the dishwasher disclosed in the embodiments of this application; Figure 4 for Figure 3 Sectional view at point AA Figure 1 ; Figure 5This is an exploded view of the spray arm of the dishwasher disclosed in an embodiment of this application; Figure 6 This is a top view of the spray arm of the dishwasher disclosed in an embodiment of this application; Figure 7 This is a bottom view of the spray arm of the dishwasher disclosed in an embodiment of this application; Figure 8 for Figure 3 Sectional view at point AA Figure 2 ; Figure 9 for Figure 8 A magnified view of a section at point C; Figure 10 for Figure 4 Sectional view at point BB; Figure 11 for Figure 8 A magnified view of a section at point D. Explanation of reference numerals in the attached figures: 100. Dishwasher; 1. Inner tub; 1a. Washing chamber; 2. Water inlet pipe; 3. Water pump; 4. Spray arm; 4a. Water storage chamber; 41. Connecting shaft; 42. Housing; 421. First housing (first side); 422. Second housing (second side); 42a. First surface; 42b. Second surface; 43. Spray hole; 431. Central hole; 432. Edge hole; 44. Flow guide; 45. Annular water outlet. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In this application, the terms "upper," "lower," "inner," "outer," and "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "installation," "setup," "equipped with," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0034] With the development of technology, dishwashers have gradually entered people's lives. Related technologies typically include spray-type dishwashers and ultrasonic dishwashers. Ultrasonic dishwashers clean dishes using ultrasonic waves, but are more expensive. Spray-arm dishwashers, on the other hand, clean dishes by placing them in the washing chamber and having water sprayed out by spray arms installed within the chamber. It's clear that in a spray-type dishwasher, the spray arms play a primary role in cleaning. However, when water is sprayed directly from the spray nozzles, it can be affected by the water pressure of the incoming water. If the water flow into the spray arms is low, the pressure of the water sprayed from the nozzles will be low, affecting the cleaning effect. Furthermore, if the water pressure is too low, the spray area may be small, failing to cover dishes placed in different positions within the dishwasher, further impacting the cleaning performance. In addition, in some dishwashers, the spray nozzles can pressurize the water, but the diffusion effect of the water flow is poor, or the water flow diffusion range of the spray nozzles is large, but the pressurization effect of the water flow is poor.

[0035] Based on this, this application discloses a dishwasher with a guide section in the spray arm, which forms an annular water outlet at the spray hole. This increases the pressure of the water jet and the spray range, thereby improving the cleaning effect on the dishes inside the dishwasher.

[0036] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0037] Please see Figure 1 This application discloses a dishwasher 100, including a housing (not shown) and an inner tub 1, the inner tub 1 being disposed inside the housing.

[0038] In some embodiments, the inner liner 1 has a washing chamber 1a, which can be used to hold tableware to be washed. See also... Figure 1 In some embodiments, the washing chamber 1a is provided with a water inlet pipe 2, which is connected to an external water source to provide water for washing tableware.

[0039] Please see Figure 1 In some embodiments, the dishwasher 100 also includes a water pump 3 to control the flow of water in the inner tank 1. For example, the water pump 3 can be used to pump water into the inlet pipe 2 or to pump water out of the inner tank 1.

[0040] In some embodiments, the dishwasher 100 further includes a heating device (not shown), which is disposed in the inner tub 1. The heating device can heat and disinfect the tableware in the washing chamber 1a or heat it during washing, making it easier for dirt on the tableware to fall off.

[0041] In some embodiments, the dishwasher 100 further includes a rack (not shown) disposed in the washing chamber 1a and configured to hold tableware.

[0042] Please see Figure 1 as well as Figure 2 In some embodiments, the dishwasher 100 further includes a spray arm 4, which is disposed in the washing chamber 1a. The spray arm 4 may be disposed on the top wall, side wall or bottom wall of the washing chamber 1a to clean the tableware in different positions in the washing chamber 1a.

[0043] Please see Figure 3 as well as Figure 4 In some embodiments, the spray arm 4 includes a connecting shaft 41 and a housing 42. One end of the connecting shaft 41 is connected to the water inlet pipe 2, and the housing 42 is connected to the other end of the connecting shaft 41. The housing 42 has a water storage chamber 4a inside, and the water storage chamber 4a is connected to the water inlet pipe 2 through the connecting shaft 41. That is, the water storage chamber 4a is connected to the water inlet pipe 2 through the connecting shaft 41 to supply water to the water storage chamber 4a.

[0044] In some embodiments, the connecting shaft 41 can rotate relative to the water inlet pipe 2, thereby adjusting the cleaning position of the spray arm 4, which in turn helps to increase the cleaning range of the spray arm 4.

[0045] In some embodiments, the housing 42 may be provided with a spray hole 43 that communicates with the water storage chamber 4a, so that water from the water storage chamber 4a can be sprayed out through the spray hole 43 to clean the tableware on the shelf.

[0046] Please see Figure 4In some embodiments, the housing 42 may include a first housing 421 and a second housing 422, the first housing 421 being connected to the second housing 422, the connecting shaft 41 being connected to the first housing 421, and the second housing 422 being provided with spray holes 43.

[0047] Optionally, the first shell 421 can be separately or integrally disposed with the second shell 422. When the first shell 421 and the second shell 422 are integrally disposed, they can be integrally formed by means of, for example, injection molding or blow molding.

[0048] Please see Figures 4 to 6 In some embodiments, the spray arm 4 further includes a guide portion 44 connected to the housing 42 and located in the water storage cavity 4a. The guide portion 44 extends at least partially into the spray hole 43, and the outer peripheral surface of the guide portion 44 is spaced apart from the hole wall surface of the spray hole 43 so that an annular outlet 45 is formed between the guide portion 44 and the hole wall surface of the spray hole 43. The annular outlet 45 is configured to pressurize and spray water from the water storage cavity 4a.

[0049] This application discloses a dishwasher 100. By providing a guide portion 44 in the water storage chamber 4a of the spray arm 4, and the guide portion 44 extending at least partially to the spray nozzle located on the housing 42, the water flow in the water storage chamber 4a can be guided to the spray nozzle through the guide portion 44. Since the guide portion 44 extends to the spray nozzle, its presence can reduce the diameter of the spray nozzle. Therefore, the water flowing out through the spray nozzle and the guide portion 44 can be pressurized at the smaller diameter spray nozzle, thereby increasing the water flow velocity and enabling the water sprayed from the spray arm 4 to effectively clean the dishes in the washing chamber 1a. Furthermore, since the guide section 44 forms an annular water outlet 45 between the spray nozzle and the spray nozzle, the water flow can be sprayed out in an annular pattern by utilizing this annular air outlet, which effectively increases the spray range of the water flow sprayed through the spray nozzle, enabling the dishwasher 100 to better clean the tableware located in hard-to-clean areas in the washing chamber 1a, thereby improving the cleaning effect of the dishwasher 100 on the tableware.

[0050] Please see Figure 4 In some embodiments, the housing 42 includes a first side 421 and a second side 422. The first side 421 is connected to the other end of the connecting shaft 41, and the second side 422 is disposed opposite to the first side 421. The second side 422 is provided with spray holes 43. A guide portion 44 is connected to the first side 421 and extends along the direction from the first side 421 to the second side 422 so as to be at least partially located in the spray holes 43. The cross-sectional area of ​​the guide portion 44 connected to the first side 421 is larger than the cross-sectional area of ​​the guide portion 44 located in the spray holes 43.

[0051] It is understood that when the housing 42 includes a first housing 421 and a second housing 422 connected to each other, the first housing 421 may have the first side 421 and the second housing 422 may have the second side 422.

[0052] When the guide section 44 is configured, the end with the larger cross-sectional area is connected to the first side 421, while the other end with the smaller cross-sectional area extends toward the second side 422 and is partially located in the spray hole 43. In this way, the end with the larger cross-sectional area of ​​the guide section 44 can form a stable connection with the first side 421 of the shell 42, thereby being able to withstand the impact of the water flow in the water storage chamber 4a. The end with the smaller cross-sectional area of ​​the guide section 44 is located in the guide hole, which can increase the pressure of the water flow sprayed from the spray hole while reducing the impact of clogging on the spray hole, thereby preventing the situation from affecting the normal water output of the spray hole.

[0053] Please see Figure 4 In some embodiments, along the extending direction of the guide portion 44, the cross-sectional area of ​​the guide portion 44 from the first side 421 to the second side 422 can gradually decrease, or the cross-sectional area of ​​the guide portion 44 from the first side 421 to the second side 422 can first increase and then decrease, or the cross-sectional area of ​​the guide portion 44 from the first side 421 to the second side 422 can first decrease and then increase and finally decrease, as long as the cross-sectional area of ​​the portion of the guide portion 44 that is finally located in the spray hole 43 is smaller than the cross-sectional area of ​​the portion where the guide portion 44 and the housing 42 are connected.

[0054] In some embodiments, the cross-sectional area of ​​the guide portion 44 gradually decreases along the direction from the first side 421 to the second side 422, so that the portion of the guide portion 44 in the spray hole 43 is constructed as a pointed tip. By configuring the shape of the guide portion 44 such that the cross-sectional area gradually decreases from the first side 421 to the second side 422, when water flows to the end of the guide portion 44 with a larger cross-sectional area, the water can flow along the guide portion 44 from the first side 421 to the second side 422, and then reach the spray hole 43, from which it is pressurized and ejected. In other words, configuring the shape of the guide portion 44 such that it gradually decreases from the first side 421 to the second side 422 effectively guides the water flow towards the spray hole 43. Furthermore, when the water flows out of the spray hole 43 along the guide portion 44, the pointed guide portion 44 located in the spray hole 43 reduces obstruction of the spray hole 43, allowing the water to better diffuse outwards along the annular outlet 45 when ejected.

[0055] Understandably, the flow guide 44 can be constructed in a conical or pyramidal shape so that the cross-sectional area of ​​the flow guide 44 gradually decreases from the first side 421 to the second side 422.

[0056] Please see Figure 4In some embodiments, the outer peripheral surface of the guide portion 44 is constructed as a concave arc surface. To improve the guidance of water flow and facilitate better water ejection from the spray hole 43, this application constructs the outer peripheral surface of the guide portion 44 as a concave arc surface. When water flows at a relatively high velocity impacts the guide portion 44, if the outer peripheral surface of the guide portion 44 is configured as a convex arc surface, the water impacting the guide portion 44 may rebound and flow back, making it difficult for the guide portion 44 to guide the water flow along its outer peripheral surface to the spray hole 43. Furthermore, the backflow may cause turbulence in the water flow within the water storage chamber 4a, further affecting the normal spraying of water from the spray hole 43. Therefore, this application constructs the outer peripheral surface of the guide portion 44 as a concave arc surface, which effectively buffers the velocity of the water flow reaching the guide portion 44, thereby facilitating the guidance of the water flow along the outer peripheral surface of the guide portion 44 to the spray hole 43, improving the smoothness of the water flow ejection from the spray hole 43.

[0057] It is understandable that when the outer peripheral surface of the flow guide 44 is constructed as a concave arc surface, that is, the outer peripheral surface of the flow guide 44 is concave inward to form a concave arc surface.

[0058] In some embodiments, the flow guide 44 may be integrally formed on the housing 42.

[0059] Please see Figure 7 as well as Figure 8 Optionally, the side of the housing 42 connected to the connecting shaft 41 includes a first surface 42a and a second surface 42b. The first surface 42a is connected to the connecting shaft 41, and the second surface 42b is located in the water storage cavity 4a. The first surface 42a is recessed toward the second surface 42b, so as to protrude from the second surface 42b to form a guide portion 44.

[0060] In this application, the guide section 44 is integrally formed with the housing 42. Specifically, the housing 42 can be recessed from its first surface 42a to its second surface 42b, causing the second surface 42b to protrude into the water storage cavity 4a, thus forming the guide section 44. For example, when the housing 42 is formed by injection molding, blow molding, or other methods, the guide section 44 is simultaneously formed within the water storage cavity 4a, making the guide section 44 integrally connected with the housing 42. This avoids installation gaps during installation that could cause leakage from the housing 42. Furthermore, the integral forming of the guide section 44 with the housing 42 improves the stability of the connection. If the water pressure in the water storage cavity 4a is too high, the guide section 44 is prevented from detaching from the housing 42 under the impact of the water flow. This integral forming method effectively improves the reliability and stability of the connection between the guide section 44 and the housing 42.

[0061] Please see Figure 8 In some embodiments, the housing 42 of the spray arm 4 may be elongated, and a plurality of spray holes 43 may be arranged sequentially at intervals along the length of the housing 42.

[0062] In order to increase the spray coverage of the spray arm 4, the housing 42 of the spray arm 4 is arranged in a long strip shape, and multiple spray nozzles are arranged in the length direction of the housing 42, thereby increasing the spray range of the spray arm 4.

[0063] In some embodiments, along the length of the housing 42, the spray hole 43 located in the middle of the housing 42 is configured as a central hole 431, the central hole 431 is opened along a first direction, and each spray hole 43 located on both sides of the central hole 431 along the length of the housing 42 is configured as an edge hole 432, the opening direction of the edge hole 432 is inclined relative to the first direction. The first direction is orthogonal to the length direction of the housing 42.

[0064] It is understandable that the first direction can be the thickness direction of the shell 42. For example... Figure 3 In the example, X indicates the length direction of the housing 42, and Y indicates the thickness direction of the housing 42.

[0065] Please see Figure 8 as well as Figure 9 For example, when water is sprayed from the central hole 431 located in the middle of the housing 42 along the first direction, the opening directions of the edge holes 432 located on both sides of the central hole 431 in the length direction of the housing 42 are inclined relative to the opening direction of the central hole 431. In this way, the edge holes 432 can spray water in a direction different from that of the central hole 431 to clean the tableware that the central hole 431 cannot clean, thereby further improving the spray cleaning range of the spray arm 4.

[0066] Please see Figure 8 In some embodiments, the opening direction of the edge holes 432 located on both sides of the central hole 431 is away from the central hole 431.

[0067] When setting the orientation of the spray holes 43, the opening direction of the edge holes 432 is set to be away from the middle hole 431. That is, the orientation of the edge holes 432 located on both sides of the middle hole 431 is away from the middle hole 431, so that the edge holes 432 spray outwards when spraying, which can effectively expand the spray range of the spray arm 4 and improve the cleaning effect on the tableware in different positions in the washing chamber 1a.

[0068] Optionally, there are multiple edge holes 432 on one side of the central hole 431, and the angle formed by the opening direction of each edge hole 432 on one side and the first direction increases from the central hole 431 to the edge hole 432.

[0069] In other words, the inclination angle of the opening direction of each edge hole 432 increases from the middle hole 431 to the edge holes 432 on both sides, and the orientation of the edge holes 432 is far away from the middle hole 431, so that when the spray arm 4 sprays, the water flow can spray better from the middle of the spray arm 4 to both sides, thereby increasing the spray cleaning range of the spray arm 4.

[0070] Please see Figure 9 and Figure 10 In some embodiments, the opening direction of the edge hole 432 forms an angle α with the first direction, satisfying: 0° < α < 50°.

[0071] For example, the included angle α can be 0°-10°, 10°-20°, 20°-30°, 30°-40°, 40°-50°, etc. For instance, the included angle α can be 5°, 10°, 15°, 20°, 25°, 30°, 35°, or 45°, etc.

[0072] When setting the opening direction of the edge hole 432, setting the opening direction of the edge hole 432 at an angle to the first direction, when the angle α is 0°, that is, the opening direction of the edge hole 432 is parallel to the first direction, it cannot effectively increase the spray range of the spray arm 4. When the angle α > 50°, on the one hand, if the edge hole 432 is tilted outward, although it will increase the spray range, the tilt angle is too large, which may make it difficult for the spray hole 43 to spray and clean the tableware in the washing chamber 1a. On the other hand, if the edge hole 432 is tilted inward, that is, the spray hole 43 sprays towards the middle hole 431, it may cause the water spray to be too concentrated, affecting the spray range of the spray arm 4. Therefore, this application controls the angle α between 0° and 50°, which can effectively increase the spray range of the spray arm 4 while also improving the accuracy of the spray cleaning.

[0073] In some embodiments, the extension direction of the guide portion 44 located in the edge hole 432 is parallel to the opening direction of the edge hole 432.

[0074] When water flows through the water storage chamber 4a and reaches the edge hole 432, the opening direction of the edge hole 432 is inclined, and the extension direction of the guide portion 44 located in the edge hole 432 is parallel to the opening direction of the edge hole 432. That is, the extension direction of the guide portion 44 located in the edge hole 432 is also inclined. In this way, the guide portion 44 can accurately guide the water flow along the opening direction of the edge hole 432 and spray it out, which helps to improve the accuracy of the spray cleaning by the spray hole 43.

[0075] Please see Figure 11 In some embodiments, the spray hole 43 may be round or square, and correspondingly, the annular outlet 45 may be square or circular.

[0076] Taking the spray hole 43 as a circular hole as an example, along the radial direction of the spray hole 43, the outer peripheral surface of the guide part 44 and the hole wall surface of the spray hole 43 have a distance d, which satisfies: 1mm < d < 4mm.

[0077] For example, the spacing d can be 1mm-1.5mm, 1.5mm-2mm, 2mm-2.5mm, 2.5mm-3mm, 3mm-3.5mm, 3.5mm-4mm, etc. For instance, d can be 1.1mm, 1.3mm, 1.5mm, 1.7mm, 2mm, 2.3mm, 2.5mm, 2.7mm, 3mm, 3.3mm, 3.5mm, 3.7mm, or 3.9mm, etc.

[0078] This application sets the distance d between the outer peripheral surface of the guide section 44 and the wall surface of the spray hole 43 to 1mm-4mm. On the one hand, it avoids a distance d < 1mm, as if d is too small, the space for water to flow out of the annular outlet 45 may be too small, affecting the smoothness of the water flow. On the other hand, it avoids a distance d > 4mm, as if d is too large, it may affect the pressurization effect of the water flow when it sprays out of the spray hole 43, resulting in too low water pressure, which is not conducive to cleaning tableware. In other words, when this application controls the distance d to 1mm-4mm, it can ensure that the water flow can be smoothly sprayed out of the spray hole 43 while maintaining the water pressure, which is beneficial to the cleaning of tableware in the washing chamber 1a.

[0079] Please see Figure 11 Optionally, the diameter of the spray hole 43 is D, which satisfies: 4mm < D < 20mm.

[0080] For example, the aperture of the spray hole 43 can be 4mm-8mm, 8mm-12mm, 12mm-16mm, 16mm-20mm, etc. For example, the aperture D of the spray hole 43 can be 5mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm or 19mm, etc.

[0081] This application controls the aperture D of the spray hole 43 to be between 4mm and 20mm. On the one hand, it avoids the aperture D of the spray hole 43 being less than 4mm. If the aperture D of the spray hole 43 is too small, the diffusion range of the annular water outlet 45 formed by the spray hole 43 and the guide part 44 is small, which is not conducive to cleaning a large area of ​​tableware in the washing chamber 1a. On the other hand, it avoids the aperture D of the spray hole 43 being greater than 20mm. If the aperture D of the spray hole 43 is too large, it is difficult to increase the pressure of the water flow sprayed from the spray hole 43 by setting the guide part 44 at the spray hole 43, resulting in a poor pressurization effect on the water flow. Therefore, this application controls the aperture of the spray hole 43 to be between 4mm and 20mm, which can maintain the pressurization effect of the spray hole 43 on the water flow while increasing the diffusion range of the water flow and improving the cleaning effect on tableware.

[0082] The dishwasher disclosed in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the dishwasher of this application and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A dishwasher, characterized in that, include: The inner tank has a washing chamber, and the washing chamber is equipped with a water inlet pipe; A spray arm is disposed inside the washing chamber; The spray arm includes: A connecting shaft, one end of which is connected to the water inlet pipe; A housing is connected to the other end of the connecting shaft. A water storage cavity is formed inside the housing, and the water storage cavity is connected to the water inlet pipe through the connecting shaft. A spray hole connected to the water storage cavity is provided on the side of the housing opposite to the other end of the connecting shaft. The spray arm also includes: A flow guide is connected to the housing and located in the water storage cavity. The flow guide extends at least partially into the spray hole, and the outer peripheral surface of the flow guide is spaced apart from the hole wall surface of the spray hole so that an annular water outlet is formed between the flow guide and the hole wall surface of the spray hole. The annular water outlet is configured to pressurize and spray water out of the water storage cavity.

2. The dishwasher according to claim 1, characterized in that, The housing includes: The first side is connected to the other end of the connecting shaft; The second side is disposed opposite to the first side, and the spray holes are provided on the second side; The guide portion is connected to the first side and extends in the direction from the first side to the second side, so as to be at least partially located in the spray hole. The cross-sectional area of ​​the guide portion connected to the first side is greater than the cross-sectional area of ​​the guide portion located in the spray hole.

3. The dishwasher according to claim 2, characterized in that, Along the direction from the first side to the second side, the cross-sectional area of ​​the guide portion gradually decreases, so that the portion of the guide portion in the spray hole is constructed as a tip.

4. The dishwasher according to claim 1, characterized in that, The outer peripheral surface of the guide section is constructed as a concave arc surface.

5. The dishwasher according to any one of claims 1-4, characterized in that, The flow guide is integrally formed into the housing; And / or, The housing connected to one side of the connecting shaft includes: The first surface is connected to the connecting shaft; The second surface is located in the water storage cavity, and the first surface is recessed towards the second surface to protrude on the second surface to form the flow guide.

6. The dishwasher according to claim 1, characterized in that, The shell is elongated, and the multiple spray holes are arranged at intervals along the length of the shell. Wherein, along the length direction of the housing, among the plurality of spray holes, the spray hole located in the middle of the housing is constructed as a central hole, and the remaining spray holes are edge holes. The central hole is opened along a first direction, and the opening direction of the edge holes is inclined relative to the first direction. The first direction is orthogonal to the length direction of the shell.

7. The dishwasher according to claim 6, characterized in that, The housing includes: The first side is connected to the other end of the connecting shaft; The second side is disposed opposite to the first side, and the second side is provided with the spray hole, wherein the opening direction of the edge holes located on both sides of the central hole is away from the central hole; and / or, The opening direction of the edge hole forms an angle α with the first direction, satisfying: 0° < α < 50°.

8. The dishwasher according to claim 6, characterized in that, The extension direction of the flow guide located in the edge hole is parallel to the opening direction of the edge hole.

9. The dishwasher according to any one of claims 1-4, characterized in that, The spray hole is a circular hole. Along the radial direction of the spray hole, the outer peripheral surface of the guide part and the hole wall surface of the spray hole have a distance d, which satisfies: 1mm < d < 4mm.

10. The dishwasher according to claim 9, characterized in that, The diameter of the spray hole is D, which satisfies the condition: 4mm < D < 20mm.

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