Dishwasher water system and dishwasher

Abstract

The present invention provides a dishwasher water system and a dishwasher, the water system comprising an inner tank for accommodating items to be washed; a water pump arranged at the bottom of the inner tank, the water pump being provided with a washing impeller for providing washing power; a spray arm arranged in the inner tank, the spray arm having a spray chamber; at least part of the washing impeller being located in the spray chamber. The dishwasher water system provided by the present invention is conducive to shortening the water path length between the water pump and the spray arm, lowering the height of the spray arm in the inner tank, and facilitating the spatial arrangement of the dishwasher by arranging at least part of the washing impeller in the spray chamber; and avoiding the need to arrange a connecting pipe from the water pump to the spray arm, thereby saving space and operations such as connection and sealing of the connecting pipe, and thus improving manufacturing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of dishwashers, and in particular relates to a dishwasher water channel system and a dishwasher having the water channel system. Background Art

[0002] Dishwashers are purchased by many families because of their good cleaning effect, multiple functions such as disinfection, and they save time and effort.

[0003] However, since there are many internal components of the dishwasher, the water system generally includes at least an inner tank, a heater, a water pump, a spray system, and a solenoid valve. These components are connected by pipes, and the pipes are connected by connectors. Each interface is fastened with a pipe clamp to prevent water leakage.

[0004] The two most important components of current dishwashers are the water systems, which are generally composed of many parts, seals and connections. During use, some interfaces will inevitably fail, which will make the water system prone to leakage. This makes the dishwasher's water system often require frequent maintenance. On the other hand, it is also proposed that the overall structure of the water system needs to be improved in the structural design of the dishwasher to make it easy to disassemble and install.

[0005] The most common pipes nowadays are various rubber pipes. Due to the different types of interfaces, the sizes and types of rubber pipes are also different, and for the convenience of installation, there is usually extra length. Various types of pipes and components occupy a lot of space at the bottom of the dishwasher, while the actual space that can be used is small, and the space utilization rate is very low.

[0006] During production, each component is installed and fixed in the inner tank. Therefore, in order to facilitate on-site installation, the space between the bottom plate of the inner tank and the spray system is artificially set larger during design. This causes a waste of space, and the produced dishwasher is large in size and looks bulky. Summary of the invention

[0007] In view of the above problems existing in the prior art, the present invention provides a dishwasher water system, which helps to shorten the water path from the water pump to the spray arm and facilitates the spatial layout of the dishwasher by arranging the upper part of the washing impeller in the spray chamber.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] A dishwasher water system, comprising:

[0010] An inner tank for containing items to be washed;

[0011] A water pump disposed at the bottom of the inner tank, the water pump being provided with a washing impeller for providing washing power;

[0012] A spray arm disposed in the inner container, wherein the spray arm has a spray chamber;

[0013] At least a portion of the washing impeller is located in the spray chamber.

[0014] Furthermore, the upper portion of the washing impeller is located in the spray chamber.

[0015] Furthermore, the washing impeller has a hub fixed on the pump shaft of the water pump, and a plurality of first blades arranged outwardly at intervals along the circumference of the hub.

[0016] Furthermore, the upper portion of the hub has a flared section extending upward and outward.

[0017] Furthermore, the first blade has a first drainage section for guiding the washing liquid toward the axis direction of the washing impeller and upward along the axis direction of the washing impeller, and a second acceleration section for accelerating the washing liquid upward along the axis direction of the washing impeller, and the second acceleration section is vertically arranged.

[0018] Furthermore, the first guide section has an arc-shaped spiral structure.

[0019] Furthermore, the first blade also has a third drainage section for guiding the washing liquid in the radial direction of the washing impeller, and the third drainage section is located in the spray chamber.

[0020] Furthermore, the upper end surface of the first blade is in the shape of an arc extending upward and radially outward, and the inner side of the upper end surface of the first blade is connected to the upper end surface of the hub.

[0021] Furthermore, a water inlet is provided on the lower end surface of the spray arm, and the washing impeller extends into the spray chamber through the water inlet.

[0022] Furthermore, a support cover matched with the spray arm is provided on the water pump, the washing impeller passes through the through hole on the support cover and extends upward, and a first matching portion matching with the water inlet is provided on the support cover.

[0023] Furthermore, the first matching portion has a first radial surface matching with the lower end surface of the spray arm outside the water inlet, and a first axial surface extending upward along the inner side of the first radial surface.

[0024] Furthermore, a downwardly protruding retaining edge is provided on the lower end surface of the spray arm and is coaxially arranged with the water inlet, and the retaining edge is located on the outer side of the water inlet.

[0025] Furthermore, a second matching portion for matching with the retaining edge is provided on the support cover.

[0026] Furthermore, a receiving chamber for receiving washing liquid is formed below the support cover, and the washing liquid in the receiving chamber is sprayed toward the spray chamber under the drive of the washing impeller.

[0027] Based on the above-mentioned dishwasher water system, the present invention also provides a dishwasher having the water system. By arranging the upper part of the washing impeller to be located in the spray chamber, it is beneficial to shorten the water path between the water pump and the spray arm, which is beneficial to the spatial layout of the dishwasher.

[0028] A dishwasher has the above-mentioned water channel system.

[0029] The dishwasher water system provided by the present invention, by arranging at least a part of the washing impeller to be located in the spray chamber, is beneficial to shortening the water path length between the water pump and the spray arm, is beneficial to lowering the height of the spray arm in the inner tank, and is beneficial to the spatial layout of the dishwasher; and avoids the need to set up a connecting pipe from the water pump to the spray arm, which saves space and also saves operations such as connecting and sealing the connecting pipe, which is beneficial to improving manufacturing efficiency.

[0030] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A structural schematic diagram of an embodiment of a dishwasher water system proposed by the present invention;

[0032] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0033] Figure 3 for Figure 2 A partially enlarged structural schematic diagram;

[0034] Figure 4 for Figure 3 A partially enlarged structural schematic diagram;

[0035] Figure 5 for Figure 4 A partially enlarged structural schematic diagram;

[0036] Figure 6 It is a schematic diagram of the enlarged structure of the washing impeller;

[0037] Figure 7 is a schematic diagram of the structure of the spray arm;

[0038] Figure 8 for Figure 7Schematic diagram of the explosion structure;

[0039] Fig. 9 for Figure 8 A schematic diagram of the structure of the lower shell in FIG.

[0040] Fig.10 It is a schematic diagram of the enlarged structure of the water pump;

[0041] Fig.11 for Fig.10 The middle is a schematic diagram of the structure after looking up and removing the bottom of the drainage chamber and the drainage impeller;

[0042] Fig.12 for Fig.11 AA-direction cross-sectional structural diagram;

[0043] Fig.13 for Fig.12 Schematic diagram of the structure of the middle part. DETAILED DESCRIPTION

[0044] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside", "upper", "lower", "left", "right", etc. are based on the positional relationships shown in the accompanying drawings, with the side closer to the user in the normal use state of the product being the "front" and the side away from the user being the "rear". The terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside", "upper", "lower", "left", "right", etc. are based on the positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] See also Figure 1-Figure 13 , is an embodiment of the dishwasher water system proposed by the present invention, a dishwasher water system, comprising an inner tank 10 for accommodating items to be washed, a water pump 1 arranged at the bottom of the inner tank 10, and a spray arm 2 arranged in the inner tank 10, the water pump 1 is provided with a washing impeller 11 for providing washing power, the spray arm 2 has a spray chamber 21, at least part of the washing impeller 11 is located in the spray chamber 21; preferably, the upper part of the washing impeller 11 is located in the spray chamber 21. By arranging the upper part of the washing impeller 11 to be located in the spray chamber 21, it is beneficial to shorten the water path length between the water pump 1 and the spray arm 2, to reduce the height of the spray arm 2 in the inner tank, and to facilitate the spatial arrangement of the dishwasher; and it is avoided to set a connecting pipe from the water pump 1 to the spray arm 2, which saves space and saves the connection and sealing operations of the connecting pipe, which is beneficial to improving manufacturing efficiency.

[0049] The water system has an inlet waterway, a washing waterway and a drainage waterway. Water flows through the inlet waterway to the inner tank, and then the washing waterway is circulated and sprayed through the water pump 1 and the spray arm 2. Finally, after the washing is completed, the washing liquid in the inner tank 10 is discharged through the drainage waterway. In the washing waterway, a water pump 1 is provided at the bottom of the inner tank 10. The water pump is arranged in the middle position of the bottom of the inner tank 10. The bottom of the inner tank 10 is low in the middle and high around. The washing liquid in the inner tank gathers at the water pump 1. The washing impeller 11 sprays the washing liquid into the spray chamber 21 of the spray arm 2. Then the spray liquid sprays the spray hole 22 opened on the spray arm 2 upward and rotates to wash the items to be washed in the inner tank 10.

[0050] See also Figure 4 As shown, the water pump 1 has a vertically arranged pump shaft 12, a washing impeller 11 fixed on the upper part of the pump shaft 12, a drainage impeller 13 fixed on the lower part of the pump shaft 12, and a driving device 14 for driving the pump shaft 12 to rotate. The water pump 1 drives the washing impeller 11 and the drainage impeller 13 through the pump shaft 12 to provide washing power and drainage power to the washing waterway and the drainage waterway respectively, combining the washing pump and the drainage pump into one, and at the same time combining the washing function and the drainage function into one, so that the dishwasher water system is highly optimized, the water consumption is reduced, the excessive accumulation of washing water in the pipeline is prevented, and the use efficiency of washing water is improved.

[0051] The driving device 14 rotates forward, and the washing impeller 11 provides washing power to the washing waterway; the driving device 14 rotates backward, and the drainage impeller 13 provides drainage power to the drainage waterway. When the water pump 1 rotates forward (the forward rotation of the present invention is not limited to clockwise or counterclockwise rotation, and is only recorded as a relative rotation of the reverse rotation), the driving device 14 drives the washing impeller 11 to rotate forward, and the waterway system has an inlet waterway, a washing waterway and a drainage waterway. Water flows through the inlet waterway to the inner tank, and then the washing waterway is circulated and sprayed through the water pump 1 and the spray arm 2. Finally, after washing is completed, the washing liquid in the inner tank 10 is discharged through the drainage waterway. In the washing water circuit, a water pump 1 is provided at the bottom of the inner tank 10. The water pump is set in the middle position of the bottom of the inner tank 10. The bottom of the inner tank 10 is low in the middle and high around. The washing liquid in the inner tank gathers toward the water pump 1. The washing impeller 11 sprays the washing liquid into the spray chamber 21 of the spray arm 2. Then the spray liquid sprays the spray hole 22 opened on the spray arm 2 upward and rotates to wash the items to be washed in the inner tank 10.

[0052] The washing liquid is fed into the spray arm 2, and the spray arm 2 sprays the washing liquid onto the items to be washed in the inner tank 10 to achieve cleaning of the dishes; when the water pump 1 reverses (the reversal of the present invention is not limited to clockwise or counterclockwise rotation, and is only recorded as a relative rotation of the forward rotation), the driving device 14 drives the drainage impeller 13 to reverse, and the dirty water in the inner tank 10 after washing the dishes is discharged through the drain pipe, so that the washing pump and the drainage pump are integrated into one, and the washing function and the drainage function are integrated into one, so that the water system of the dishwasher is highly optimized, the water consumption is reduced, the excessive accumulation of washing liquid in the pipeline is prevented, and the use efficiency of the washing liquid is improved; because the washing pump and the drainage pump are integrated into one, the water pump 1 described in the present invention occupies a very small space in the dishwasher, so that the washing capacity of the dishwasher is expanded and the washing efficiency is improved without changing the structural size.

[0053] See also Figure 5 and Figure 6As shown, the washing impeller 11 has a hub 111 fixed on the pump shaft 12 of the water pump 1, and a plurality of first blades 112 arranged at intervals on the outer peripheral surface of the hub 111. The first blades 112 enhance the flow of washing liquid and provide washing power to the washing waterway. The first blades 112 include a first drainage section 1121 that guides the washing liquid toward the axial direction of the washing impeller 11 and upward along the axial direction of the washing impeller 11; a second acceleration section 1122 that accelerates the washing liquid upward along the axial direction of the washing impeller 11, and the second acceleration section 1122 is vertically arranged; and also includes a third drainage section 1123 that guides the washing liquid in the radial direction of the washing impeller 11, and the third drainage section 1123 is located in the spray chamber 21. The first blade 112 includes a first guide section 1121, a second acceleration section 1122 and a third guide section 1123 which are arranged in sequence from bottom to top; by setting the structure of the first blade 112, the flow trend of the washing liquid is enhanced, and the washing efficiency of the dishwasher is further improved, so that the washing liquid can flow into the spray chamber 21 at a high speed at the outlet end of the washing impeller 11, thereby reducing the energy consumption cost and improving the efficiency of the spray system.

[0054] See also Figure 6 As shown, the first drainage section 1121 is an arc-shaped spiral structure. The first drainage section 1121 is set as an arc-shaped spiral structure so that the washing liquid is driven by the washing impeller 11 and is better guided by the first blade 112 as the washing impeller 11 rotates, and better enters the next structural section of the first blade 112. As the washing impeller 11 rotates, the washing liquid is better concentrated upward along its axial direction to achieve a larger lift.

[0055] See also Figure 8 and Fig. 9 As shown, a water inlet 23 is provided on the lower end surface of the spray arm 2, and the washing impeller 11 extends into the spray chamber 21 through the water inlet 23. The spray arm 2 is formed by sealing and buckling an upper shell and a lower shell, and the lower end surface of the lower shell is also the lower end surface of the spray arm 2, that is, the lower end surface of the spray arm 2 is lower than the upper end surface of the washing impeller 11; the water inlet 23 is directly provided on the lower end surface of the spray arm 2, which saves the need to set a water inlet portion extending downward, is conducive to reducing the height of the spray arm 2, and is conducive to reducing the manufacturing cost; at the same time, the washing liquid has entered the spray chamber 21 before leaving the washing impeller 11, which is conducive to reducing the energy loss of the spray water flow, and the washing impeller 11 located in the spray chamber 21 has a greater driving effect on the flow of water in the spray chamber 21, which is conducive to ensuring the intensity of the water flow sprayed from the spray hole 22 and improving the washing cleanliness.

[0056] See also Figure 4As shown, a support cover 15 matching with the spray arm 2 is provided on the water pump 1, the washing impeller 11 passes through the through hole 151 on the support cover 15 and extends upward, and a first matching portion 152 matching with the water inlet 23 is provided on the support cover 15. Specifically, the first matching portion 152 has a first radial surface 1521 matching with the lower end surface of the spray arm 2 outside the water inlet 23, and a first axial surface 1522 extending upward along the inner side of the first radial surface 1521. The spray arm 2 is directly placed on the support cover 15, so that the washing impeller 11 is located in the spray chamber 21, and at the same time, the water inlet 23 contacts the first matching portion 152, so that the support cover 15 supports the gravity of the spray arm 2; there is no assembly and fixing relationship between the spray arm 2 and other components. When the washing water circuit is working, the spray arm 2 is in a suspended rotating spraying state, so that the spray arm 2 does not contact with other parts during spraying, that is, the spray arm 2 is supported by the water flow sprayed upward by the water pump, and the spray arm 2 moves slightly upward so that it leaves the support cover 15 and is in a suspended state; the suspended rotating spraying state of the spray arm 2 reduces the friction of the spray arm 2 during rotation, avoids the wear of the spray arm 2 during rotation, and is beneficial to improving the speed and efficiency of the rotating spraying of the spray arm 2; at the same time, it saves the setting of the rotatable parts of the spray arm 2, which is beneficial to reducing the height of the spray arm 2, shortening the washing water circuit, reducing the space occupied by the inner tank 10, and reducing the installation and manufacturing costs.

[0057] See also Figure 5 As shown, the lower end surface of the spray arm 2 also has a downwardly protruding retaining edge 24, which is coaxially arranged with the water inlet 23, and is located on the outside of the water inlet 23. A second matching portion 153 for matching with the retaining edge 24 is provided on the support cover 15, so that when the washing water circuit is working, when the spray arm 2 moves upward and is in a suspended state, the height to which the spray arm 2 moves upward is preferably lower than or equal to the height of the first axial surface 1522, so as to avoid a certain overlap between the support cover 15 and the water inlet 23 in the radial direction, and avoid a gap between the support cover 15 and the water inlet 23 in the radial direction, so as to ensure that the water flow lifted by the washing impeller 11 enters the spray chamber 21 completely.

[0058] The upper part of the hub 111 has a flared section extending upward and outward, the upper end surface of the first blade 112 is an arc extending upward and radially outward, and the inner side of the upper end surface of the first blade 112 is connected to the upper end surface of the hub 111. The inner side of the through hole 15 on the support cover 15 is provided with a circular arc-shaped drainage portion 154 extending in the up-down direction and convex inward, and the arc-shaped inner side surface of the drainage portion 154 matches the outer end surface of the first blade 112, so that the water flow raised by the washing impeller 11 flows upward with the rotation of the first blade 112, and the outer side of the raised water flow flows through the arc-shaped inner side surface of the drainage portion 154, and can reach the spray chamber 21 more smoothly.

[0059] A receiving chamber 16 for receiving washing liquid is formed below the support cover 15. The washing liquid in the receiving chamber 16 is sprayed toward the spray chamber 21 driven by the washing impeller 11. The receiving chamber 16 is located at a relatively low position in the inner tank 10, so that the washing water after spraying flows back into the receiving chamber 16.

[0060] There is no fixed assembly relationship between the spray arm 2 and the water pump 1, and there is no fixed assembly relationship between the spray arm 2 and other components. The spray arm 2 and the water pump 1 are an assembly-free structure, or in other words, the spray arm 2 is an assembly-free structure; the spray arm 2 can achieve suspended rotating spraying, which is related to the matching relationship between the spray arm 2 and the water pump 1, and also related to the structure of the spray arm 2 itself.

[0061] When the spray arm 2 is not working, the spray arm 2 is subject to gravity and the support force given by the support cover 15, specifically, the gravity of the spray arm 2 acts on the first radial surface 1521 of the first matching portion 152. When the spray arm 2 is working, the washing liquid lifted by the water pump 1 is sprayed into the spray chamber 21, giving the spray arm 2 a force to move upward and achieve suspension. The spray arm 2 itself has gravity, and the washing liquid flowing in the spray arm 2 also has gravity; in order to achieve the suspension of the spray arm 2, the upward force given to the spray arm 2 by the washing liquid is greater than or equal to the downward gravity received by the spray arm 2. When the spray arm 2 starts to move upward, the upward force given to the spray arm 2 by the washing liquid is definitely greater than the downward gravity exerted on the spray arm 2; of course, the displacement of the spray arm 2 when it starts to move upward is small, and it mainly depends on the force of the water flow sprayed upward when the water pump 1 starts to work to lift the spray arm 2 upward; preferably, in the subsequent spraying process, the upward force exerted on the spray arm 2 by the washing liquid lifted by the water pump 1 is equal to the downward gravity exerted on the spray arm 2, thereby ensuring that the spray arm 2 is suspended in a relatively stable position.

[0062] See also Figure 6 As shown, an inclined spray hole 22 is provided on the upper end surface of the spray arm 2. The spray hole 22 has a certain angle with the plane passing through the axis of the spray arm 2. When spraying water, the inclined spray hole 22 gives the spray arm 2 a reverse force, pushing the spray arm 2 to rotate. In order to enable the spray arm 2 to rotate around its axis, the spray chamber 21 has a water inlet chamber 211 located in the middle of the spray arm 2, and the axis of the water inlet chamber 211 coincides with the axis of the spray arm 2; a positioning portion 213 extending downward is provided on the top wall of the water inlet chamber 211, and the positioning portion 213 is used for positioning the rotation of the spray arm 2, and is used to enable the spray arm 2 to rotate around its axis. The positioning portion 213 is coaxially arranged with the washing impeller 11, and the positioning portion 213 is located above the washing impeller 11.

[0063] The spray arm 2 has an upper shell 28 and a lower shell 29; and a spray chamber 21 formed by the upper shell 28 and the lower shell 29, the upper shell 28 and the lower shell 29 are smoothly connected, and the up and down can be understood as the up and down in the vertical direction when the spray arm 1 is placed horizontally.

[0064] The washing impeller 11 has a hub 111 and a plurality of first blades 112 arranged on the hub 111. The hub 111 is fixed on the pump shaft 12. When the washing impeller 11 rotates, the first blades 112 play a role of lifting water flow, that is, the lifted water flow must be located outside the hub 111, that is, the water flow lifted by the washing impeller 11 is a hollow circular ring, and the upper part of the hub 111 has a flared section extending upward and outward, and the upper part of the first blade 112 has a third drainage section 1123 for guiding the washing liquid in the radial direction of the washing impeller 11, so that the washing The hollow annular water flow raised by the impeller 11 has a tendency to move upward and outward when leaving the washing impeller 11, that is, there is almost no water flow directly above the hub 111, but the upward and outward moving water flow will definitely disperse after hitting the top wall of the water inlet chamber 211; therefore, a positioning portion 213 is provided to guide the water flow after leaving the washing impeller 11 and flow into the spray hole 22 to avoid the water flow pushing the positioning portion 213 and forming a turbulent flow; and the positioning portion 213 is subjected to uniform force in the circumferential direction, so that the rotation around the positioning portion 213 can be prevented.

[0065] Preferably, the positioning portion 213 is in a basin shape, and the lower end surface of the positioning portion 213 has a bottom surface 2131 and an arc-shaped side surface 2132 that smoothly transitions to the bottom surface 2131. The radial dimension of the hub 111 is larger than the radial dimension of the bottom 2131 of the positioning portion 213, which ensures that the water flow raised by the washing impeller 11 will not reach the bottom 2131 of the positioning portion 213, and the arc-shaped side surface 2132 plays a role in guiding the water flow in the circumferential direction.

[0066] See also Fig. 9As shown, the spray chamber 21 also includes a spray channel 212 connected to the water inlet chamber 211, and the spray hole 22 is arranged on the spray channel 212. A guide structure 214 is provided between the water inlet chamber 211 and the spray channel 212 to guide and buffer the flow of the washing liquid in the spray chamber 21. After the washing liquid enters the water inlet chamber 211, it enters the spray channel 212 under the guidance of the guide structure 214. The guide structure 6 is configured to transport the washing liquid from the water inlet chamber 211 of the spray chamber 21 to the spray channel 212 along at least one circular trajectory. The circular motion reduces the impact of the washing liquid on the inner wall of the spray arm 2 after entering the spray chamber 21, and also avoids the sudden increase of pressure in the spray chamber 21. The guide structure 214 is integrally formed with the inner wall of the spray arm 1 and extends into the spray chamber 21, thereby reducing the flow area of ​​the washing liquid in the spray chamber 21. Through the guidance of the guide structure 214, the collision caused by too fast inflow is avoided, and a certain guiding effect is produced on the flow direction of the washing liquid.

[0067] An opening 2143 is provided between the flow guiding structure 214 and the inner wall of the spray arm 2, and the washing liquid is transported from the water inlet cavity 211 to the spray flow channel 212 through the opening 2143. After the washing liquid enters the water inlet cavity 211 of the spray chamber 21, it is guided by the flow guiding structure 214 and transported from the water inlet cavity 211 to the spray flow channel 212 through the opening 2143.

[0068] The guide structure 214 also includes a first guide section 2141 that allows the washing liquid to move along at least one circular trajectory after entering the water inlet chamber 211; and a second guide section 2142 that guides the washing liquid from the opening 2143 to the spray channel 212. Preferably, the first guide section 2141 is an arc-shaped structure extending from the inner wall of the spray arm 2 to the water inlet chamber 211. The setting of the arc-shaped structure cooperates with the flow of the washing liquid in the spray chamber 21, reduces the resistance to the flow of the washing liquid, and plays a good guiding role. At least two of the first guide sections 2141 are relatively arranged on the inner wall of the spray arm 1, so that the washing liquid can form at least one circular trajectory along the arc-shaped structure of the guide structure 214. The second guide section 2142 is connected to the first guide section 2141, and extends from the opening 2143 to the far end of the spray channel 212.

[0069] Specifically, the first guide section 2141 is arranged in an open circle or arc shape along the water inlet chamber 211 in the spray arm 2, and at least two sections are arranged in the spray chamber 2. After the washing liquid enters the spray chamber 2 from the water inlet 23, it splashes everywhere in the spray chamber 2 due to its large impact. The first guide section 2141 plays a role in reducing the connection area between the water inlet chamber 211 and the spray channel 212. Therefore, most of the washing liquid is intercepted by the first guide section 2141 in the water inlet chamber 211 and moves along at least one circular trajectory at the first guide section 2141, which can be clockwise or counterclockwise. This embodiment does not make further restrictions on this. Since the first guide section 2141 is arranged in an arc shape, the washing liquid cannot pass through the opening 2143 when it is at a higher flow rate. When the washing liquid is at a lower flow rate under the action of the first guide section 2141, it can flow from the opening 2143 into the second guide section 2142.

[0070] The flow basin formed by the washing liquid in the second guide section 2142 gradually increases from the side of the second guide section 2142 close to the water inlet chamber 211 to the side away from the water inlet chamber 211, so that the washing liquid can be accelerated from circular motion to linear motion, so that the washing liquid can reach the spray working position faster, ensuring the normal use of the spray arm 2.

[0071] Specifically, when the washing liquid flows to the second guide section 2142, the second guide section 2142 passes through the gradually increasing flow channel, so that the washing liquid is accelerated when flowing through the second guide section 2142, obtains a higher flow velocity, and flows to the spray hole 22 set on the spray arm 2 to realize the spraying operation; the second guide section 2142 flows with the washing liquid, and the gradual setting from the side close to the water inlet chamber 211 to the side away from the water inlet chamber 211 can be achieved by setting the second guide section 2142 to be arc-shaped or inclined.

[0072] See also Figure 10-13As shown, in order to achieve drainage when the drainage impeller 13 is reversed and no drainage is achieved when it is forwardly rotated; the water pump 1 also includes a drainage chamber 181, the drainage chamber 181 is connected to the drainage inlet pipe 182 and the drainage outlet pipe 183, and the drainage impeller 13 is located in the drainage chamber 181; a radially fixed flow blocking structure 171 is provided in the drainage chamber 181, and the flow blocking structure 171 is used to guide the flow direction of the water flow pushed by the drainage impeller 13. Through the radially fixed flow blocking structure 171, when the water flow driven by the drainage impeller 13 flows, the flow blocking structure 171 blocks the water flow in the radial direction and guides the water flow into the drainage inlet pipe 182 or the drainage outlet pipe 183; the forward or reverse rotation of the drainage impeller 13 is used to push the water flow in the drainage chamber 181 to rotate forward or reverse, that is, the water flow hits the first drainage surface or the second drainage surface of the flow blocking structure 171, and further guides the water flow into the drainage inlet pipe 182 or the drainage outlet pipe 183; since the flow blocking structure 171 is fixed, it is beneficial to the stability of the flow blocking structure 171, which is beneficial to ensuring the drainage effect and avoiding the problem of drainage failure.

[0073] When the drainage impeller 13 rotates forward (the forward rotation of the present invention is not limited to clockwise or counterclockwise rotation, and is only recorded as a relative rotation of the reverse rotation), the drainage impeller 13 pushes the water flow in the drainage chamber 181 to rotate forward, and part of the forward rotating water flow reaches the drainage inlet pipe 182, part of it hits the first guide surface of the flow blocking structure 171, and part of it flows through the lower end of the flow blocking structure 171; part of the water flow that hits the flow blocking structure 171 enters the drainage inlet pipe 182 under the guidance of the flow blocking structure 171, so that the washing liquid in the drainage chamber 181 is partially pushed into the drainage inlet pipe 182, resulting in the washing liquid being unable to continue to enter the drainage chamber 181 through the drainage inlet pipe 182; when the drainage impeller 13 rotates forward, no drainage effect is played.

[0074] When the drainage impeller 13 reverses (the reversal of the present invention is not limited to clockwise or counterclockwise rotation, it is only recorded as a relative rotation of the forward rotation), the drainage impeller 13 pushes the water flow in the drainage chamber 181 to reverse, and part of the reversed water flow reaches the drainage outlet pipe 183, part of it hits the first guide surface of the flow blocking structure 171, and part of it flows through the lower end of the flow blocking structure 171; part of the water flow that hits the flow blocking structure 171 enters the drainage outlet pipe 183 under the guidance of the flow blocking structure 171, so that the washing liquid in the drainage chamber 181 is partially pushed into the drainage outlet pipe 183, and at this time the drainage inlet pipe 182 continues to transport the washing liquid into the drainage chamber 181; when the drainage impeller 13 reverses, it does not play a drainage role.

[0075] The drainage chamber 181 is provided with a water inlet connected to the drainage water inlet pipe 182 and a water outlet connected to the drainage water outlet pipe 183; preferably, a flow blocking structure 171 is arranged between the water inlet and the water outlet, the water inlet and the water outlet are arranged adjacent to each other, and the flow blocking structure 171 is fixedly arranged in the drainage chamber 181. In the drainage chamber 181, the water flow pushed by the drainage impeller 13 rotates with the drainage impeller 13, and the flow blocking structure 171 is arranged radially to block the rotating water flow.

[0076] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A dishwasher water system, characterized in that: include An inner tank for containing items to be washed; A water pump disposed at the bottom of the inner tank, the water pump being provided with a washing impeller for providing washing power; A spray arm disposed in the inner container, wherein the spray arm has a spray chamber; At least part of the washing impeller is located in the spray chamber; The water pump comprises a vertically arranged pump shaft, a washing impeller fixed to the upper part of the pump shaft, a drainage impeller fixed to the lower part of the pump shaft, and a drainage chamber for accommodating the drainage impeller; A flow-blocking structure is provided in the drainage chamber and is fixedly arranged radially. A water inlet connected to the drainage water inlet pipe and a water outlet connected to the drainage water outlet pipe are provided in the drainage chamber. The water inlet and the water outlet are arranged adjacent to each other. The flow-blocking structure is located between the water inlet and the water outlet. When the water flow driven by the drainage impeller flows, the flow blocking structure blocks the water flow in the radial direction and guides the water flow into the drainage inlet pipe or the drainage outlet pipe.

2. The waterway system according to claim 1, characterized in that: The washing impeller comprises a hub fixed on the pump shaft of the water pump, and a plurality of first blades arranged outwardly and spaced apart in the circumferential direction of the hub.

3. The waterway system according to claim 2, characterized in that: The first blade has a first drainage section for guiding the washing liquid toward and upward along the axis of the washing impeller, and a second acceleration section for accelerating the washing liquid upward along the axis of the washing impeller, and the second acceleration section is vertically arranged.

4. The waterway system according to claim 3, characterized in that: The first blade further has a third guide section for guiding the washing liquid in the radial direction of the washing impeller, and the third guide section is located in the spray chamber.

5. The waterway system according to claim 2, characterized in that: The upper end surface of the first blade is in an arc shape extending upward and radially outward, and the inner side of the upper end surface of the first blade is connected to the upper end surface of the hub.

6. The waterway system according to any one of claims 1 to 5, characterized in that: A water inlet is provided on the lower end surface of the spray arm, and the washing impeller extends into the spray chamber through the water inlet.

7. The waterway system according to claim 6, characterized in that: A support cover matched with the spray arm is arranged on the water pump, the washing impeller passes through the through hole on the support cover and extends upward, and a first matching portion matched with the water inlet is arranged on the support cover.

8. The waterway system according to claim 7, characterized in that: A downwardly protruding retaining edge coaxially arranged with the water inlet is provided on the lower end surface of the spray arm, and the retaining edge is located on the outer side of the water inlet.

9. The waterway system according to claim 8, characterized in that: A second matching portion for matching with the retaining edge is provided on the support cover.

10. A dishwasher, characterized in that: A waterway system according to any one of claims 1 to 9.

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