Assembling and fixing structure of heating disc of dish-washing machine and dish-washing machine

Abstract

The application discloses a kind of assembly fixing structure of dishwasher heating disc and dishwasher, assembly fixing structure includes: heating disc, it is set in the outside of dishwasher motor shell;Assembly fixing ring is fixed to motor shell by rotating clamping, for realizing the fixation of the inside of the heating disc and motor shell.By setting heating disc set in the outside of dishwasher motor shell, so that heating component can be arranged in the lower end surface of heating disc, so that heating component is isolated from washing water, without again setting waterproof of heating component, it is advantageous to the simplification of structure;And heating disc as the component part of washing water path, washing water flows from the upper end surface of heating disc, avoids the blocking effect to water flow, also prevents the impact of water flow to heating disc, it is advantageous to improve heating efficiency, and increase the firmness after assembly;Setting assembly fixing ring, by rotating clamping fixed to motor shell, realize the fixation of the inside of the heating disc and motor shell, can be conveniently realized assembly and disassembly.

Description

Technical Field

[0001] This invention belongs to the field of dishwasher technology, specifically relating to an assembly and fixing structure for a dishwasher heating plate and a dishwasher. Background Technology

[0002] Dishwashers are devices that automatically clean tableware such as bowls, chopsticks, plates, dishes, knives, and forks. They can be divided into two main categories according to their structure: box type and conveyor type. They are often used in homes, restaurants, hotels, and canteens of government agencies, reducing labor intensity, improving work efficiency, and enhancing cleanliness and hygiene.

[0003] Currently, commercially available dishwashers have relatively large heaters located inside the washing or heating chamber, and the washing pump and motor are also bulky, occupying a significant amount of workspace. To save space, a solution has emerged that integrates the heating function into the washing pump; however, this often disrupts the original flow channel structure, resulting in additional hydraulic losses. Furthermore, because the heater requires electricity, its wiring terminals must extend beyond the heating chamber. When the heating element extends, a seal between the heating element and the heating chamber wall is necessary to prevent water leakage. The heater is typically secured to the wiring terminals on the outside of the heating chamber wall. Since the heater is located inside the heating chamber, the impact of the washing water on the heating element can cause it to loosen, thus requiring a seal between the heating element and the heating chamber wall.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention proposes an assembly and fixing structure for the heating plate of a dishwasher, which simplifies the assembly process and enhances the stability of the assembled product.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0007] An assembly and fixing structure for a dishwasher heating plate includes:

[0008] A heating plate, which is fitted onto the outside of the dishwasher motor housing, is used to heat the washing water;

[0009] An assembly retaining ring is used to fix the heating plate to the motor housing by rotation and engagement, thereby securing the inner side of the heating plate to the motor housing.

[0010] Furthermore, the motor housing is provided with a downwardly extending outer cylinder, the mounting and fixing ring is fitted on the outside of the outer cylinder, and a first circumferential engagement structure is provided between the outer cylinder and the mounting and fixing ring for rotatable engagement.

[0011] Furthermore, the first circumferential engagement structure includes multiple spaced first outer baffles on the circumference of the outer cylinder and multiple spaced first inner baffles on the assembly fixing ring. After the assembly fixing ring is engaged and fixed, the first inner baffles are located above the first outer baffles.

[0012] Furthermore, the distance between two adjacent first outer baffles is greater than the circumferential dimension of the first inner baffle, and the distance between two adjacent first inner baffles is greater than the circumferential dimension of the first outer baffle.

[0013] Furthermore, the number of first outer baffles provided on the outer cylinder is the same as the number of first inner baffles provided on the assembly fixing ring.

[0014] Furthermore, the assembly fixing ring is fixed to the outer cylinder by rotational engagement, and the axial dimension of the first inner baffle gradually increases in the direction of rotational engagement of the assembly fixing ring.

[0015] Furthermore, the upper end face of the first inner baffle is flush with the upper end face of the assembly fixing ring.

[0016] Furthermore, the lower end face of the first inner baffle is inclined downward in the direction in which the assembly fixing ring rotates and engages.

[0017] Furthermore, a positioning protrusion is provided on the first outer baffle, and a positioning groove matching the positioning protrusion is provided on the first inner baffle. After the assembly fixing ring is rotated into place, the positioning protrusion is located in the positioning groove.

[0018] Furthermore, a stop rib is provided on the outer cylinder body, extending upward along one end of the first outer baffle. After the assembly fixing ring is rotated into place, the stop rib stops in front of the first inner baffle in the direction of rotational installation.

[0019] Furthermore, the assembly and fixing structure also includes an assembly hole on the bottom wall of the dishwasher inner tub, and the outer side of the heating plate is fixed at the assembly hole.

[0020] Furthermore, it also includes an assembly bracket for fixing the heating plate to the assembly hole, the assembly bracket being rotatably engaged and fixed at the assembly hole, and a second circumferential engagement structure being provided at the assembly bracket and the assembly hole.

[0021] Furthermore, the second circumferential engaging structure includes a plurality of downwardly extending fixing claws on the bottom wall at the assembly hole and a second outwardly extending baffle on the assembly bracket, the second outwardly extending baffle engaging with the fixing claws.

[0022] Furthermore, the fixing claw has a downwardly extending support portion and a blocking claw portion that bends inward along the lower end of the support portion, and the second outer blocking rib is located above the blocking claw portion.

[0023] Furthermore, the distance between two adjacent second outer baffles is greater than the circumferential dimension of the fixing claw, and the distance between two adjacent fixing claws is greater than the circumferential dimension of the second outer baffle.

[0024] Furthermore, the heating plate has an annular heating body, an inner curved portion extending downward and inward along the inner side of the heating body, and an outer curved portion extending downward and outward along the outer side of the heating body. The inner curved portion, the heating body, and the outer curved portion surround to form a concave cavity, and the heating component is located in the concave cavity.

[0025] Furthermore, the inner bend of the heating plate is sealed and fixed to the motor housing, and an annular first sealing gasket is provided between the inner bend and the motor housing.

[0026] Furthermore, the motor housing has an annular upper end, and the inner curved portion has an inner extension extending downward along the inner side of the heating body, and an inner trim edge extending inwardly along the lower end of the inner extension, the inner trim edge being located below the upper end.

[0027] Furthermore, the first sealing gasket has an annular groove-shaped sealing body with a radial opening, and the inner lining is located within the sealing body.

[0028] Furthermore, the sealing body has an upper sealing portion located above the inner edge, a lower sealing portion located below the inner edge, and a connecting portion connecting the upper sealing portion and the lower sealing portion.

[0029] Furthermore, at least one upwardly protruding first annular sealing rib is provided on the upper side of the seal.

[0030] Furthermore, at least one downwardly protruding second annular sealing rib is provided on the lower side of the seal.

[0031] Furthermore, the first sealing gasket also has a sealing extension extending outward and upward along the outer side of the upper sealing portion, the sealing extension being located between the inner extension and the motor housing.

[0032] Based on the above-described assembly and fixing structure of the dishwasher heating plate, the present invention also provides a dishwasher with the above-described fixing structure, which simplifies the assembly operation and helps to increase the firmness after assembly.

[0033] A dishwasher includes a cabinet, an inner tub disposed within the cabinet, and a heating plate disposed on the bottom wall of the inner tub, the heating plate being assembled and fixed by the aforementioned assembly and fixing structure.

[0034] Compared with the prior art, the advantages and positive effects of the present invention are as follows: By setting the heating plate to be sleeved on the outside of the dishwasher motor housing, the heating component can be set on the lower end face of the heating plate, thus isolating the heating component from the washing water and eliminating the need for waterproofing the heating component, which simplifies the structure; furthermore, as the heating plate is a component of the washing water circuit, the washing water flows over the upper end face of the heating plate, avoiding obstruction of the water flow and preventing the water flow from impacting the heating plate, which helps to improve heating efficiency and increases the firmness after assembly; the assembly fixing ring is set and fixed to the motor housing by rotation and snap-fit, realizing the fixation of the inner side of the heating plate to the motor housing, which can facilitate assembly and disassembly and improve operational efficiency; and during the assembly process, after the heating plate moves upward into place, it stops moving, which is beneficial for the positioning of the heating plate.

[0035] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of an embodiment of the assembly and fixing structure for the dishwasher heating plate proposed in this invention;

[0038] Figure 2 for Figure 1 A three-dimensional structural diagram showing the cross-section after assembly;

[0039] Figure 3 for Figure 2 Enlarged schematic diagram of the middle section structure;

[0040] Figure 4 for Figure 3 Enlarged structural diagram of the heating plate;

[0041] Figure 5 for Figure 1 Enlarged structural diagram of the central heating plate;

[0042] Figure 6 for Figure 5 Enlarged structural diagram of the cross-section;

[0043] Figure 7 for Figure 1 A magnified schematic diagram of the motor.

[0044] Figure 8 for Figure 7 Enlarged schematic diagram of the middle section;

[0045] Figure 9 for Figure 1 Enlarged structural schematic diagram of the fixing ring in the middle assembly;

[0046] Figure 10 for Figure 9 A magnified structural diagram of region C in the middle;

[0047] Figure 11 for Figure 1 Enlarged structural diagram of the central assembly bracket;

[0048] Figure 12 for Figure 1 Enlarged structural diagram of the first sealing gasket;

[0049] Figure 13 for Figure 12 Enlarged structural diagram of the cross-section;

[0050] Figure 14 for Figure 1 Top view of the assembled structure;

[0051] Figure 15 for Figure 14 Schematic diagram of the cross-sectional structure along the middle AA direction;

[0052] Figure 16 for Figure 15 Enlarged schematic diagram of the middle section structure;

[0053] Figure 17 for Figure 16 Enlarged structural diagram of the heating plate;

[0054] Figure 18 for Figure 1 Enlarged structural diagram of the central base area;

[0055] Figure 19 for Figure 18 A magnified structural diagram of region B in the middle;

[0056] Figure 20 for Figure 1 Enlarged schematic diagram of the intermediate isolation filter structure;

[0057] Figure 21 for Figure 20 A schematic diagram of the main structure. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0059] In the description of this invention, it should be noted that the terms "upper," "lower," "left," and "right," etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, with the direction closer to the inner cylinder axis being "inner," and the opposite being "outer." These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] See Figures 1-13The present invention provides an assembly and fixing structure for a dishwasher heating plate. The assembly and fixing structure includes a heating plate 30 and an assembly and fixing ring 60. The heating plate 30 is sleeved on the outside of the dishwasher motor housing 11. The assembly and fixing ring 60 is fixed to the motor housing 11 by rotation and engagement, thereby fixing the inner side of the heating plate 30 to the motor housing 11. By setting the heating plate 30 to be fitted onto the outside of the dishwasher motor housing 11, the heating element 34 can be placed on the lower end face of the heating plate 30, thus isolating the heating element 34 from the washing water and eliminating the need for waterproofing the heating element, which simplifies the structure. Furthermore, as part of the washing water path, the washing water flows over the upper end face of the heating plate 30, avoiding obstruction of the water flow and preventing water impact on the heating plate, which improves heating efficiency and increases the stability of the assembly. The assembly fixing ring 60, which is rotated and engaged to fix it to the motor housing 11, secures the inner side of the heating plate 30 to the motor housing 11, facilitating assembly and disassembly and improving operational efficiency. Moreover, during assembly, once the heating plate 30 moves upward into position, it stops moving, which helps in positioning the heating plate 30.

[0062] See Figure 1 , Figure 5 , Figures 13-16 The diagram illustrates the assembly and fixing structure between the assembly fixing ring 60 and the motor housing 11. The motor housing 11 has a downwardly extending outer cylinder 112, and the assembly fixing ring 60 is fitted onto the outer side of the outer cylinder 112. A first circumferential locking structure is provided between the outer cylinder 112 and the assembly fixing ring 60 for rotatable engagement. In this embodiment, the first circumferential locking structure consists of multiple spaced-apart first outer baffles 113 on the circumference of the outer cylinder 112 and multiple spaced-apart first inner baffles 61 on the assembly fixing ring 60. After the assembly fixing ring 60 is engaged and fixed, the first inner baffles 61 are positioned above the first outer baffles 113, thus fixing the assembly fixing ring 60 to the motor housing 11 and pressing the inner side of the heating plate 30 between the assembly fixing ring 60 and the upper end 111. Preferably, the number of first outer baffles 113 on the outer cylinder 112 is the same as the number of first inner baffles 61 on the assembly fixing ring 60.

[0063] To achieve the engagement of the first outer baffle 113 and the first inner baffle 61, a fixing ring 60 needs to be fitted onto the outer cylinder 112, with the first inner baffle 61 positioned above the first outer baffle 113. The distance between two adjacent first outer baffles 113 needs to be greater than the circumferential dimension of the first inner baffle 61, and the distance between two adjacent first inner baffles 61 needs to be greater than the circumferential dimension of the first outer baffle 113. In other words, after the fixing ring 60 is fitted onto the outer cylinder 112 and moved upwards, the first inner baffle 61 can pass between two adjacent first outer baffles 113. The gap between two adjacent first inner baffles 61 can also allow the first outer baffle 113 to pass through, or in other words, the first outer baffle 113 can move downwards relative to the two adjacent first inner baffles 61. Then, the fixing ring 60 is rotated so that the first inner baffle 61 is positioned above the first outer baffle 113, thus completing the fixation between the inner side of the heating plate 30 and the motor housing 11.

[0064] See Figures 5-6 As shown, for ease of explanation, the heating plate 30 has a heating body 31 with a lower outer surface and a higher inner surface, an inner curved portion 32 extending downward and inward along the inner side of the heating body 31, and an outer curved portion 33 extending downward and outward along the outer side of the heating body 31. The inner curved portion 32, the heating body 31, and the outer curved portion 33 form a cavity 400, within which the heating component 34 is located. The cavity 400 provides space for the heating component 34. For example, if water leaks from the connection point on the inner or outer side of the heating plate 30, the leaking water droplets will not flow upward along the inner curved portion 32 or the outer curved portion 33 into the cavity 400, thus protecting the safety of the heating component 34. Preferably, the heating plate 30 is made of metal, and the heating component 34 is a heating film attached to the lower end face of the heating body 31, which facilitates heat transfer. Regarding the radial tilt angle of the heating body 31, if the tilt is too large, the water flow speed over the heating plate 30 will be too slow, resulting in reduced washing efficiency; however, if the tilt angle is too small, it will not improve heating efficiency either. Preferably, the angle between the heating body 31 and the horizontal plane is 3° to 10°, and more preferably, the angle between the heating body 31 and the horizontal plane is 5° to 6°.

[0065] For the fixing between the inner bend 32 and the motor housing 11, in order to ensure that the outer side of the upper end 111 is flush with the inner side of the heating body 31, the inner bend 32 is provided with an inner extension 321 extending downward along the inner side of the heating body 31 and an inner mounting edge 322 extending inward along the lower end of the inner extension 321, wherein the inner mounting edge 322 is located below the upper end 111; the heating plate 30 is installed from bottom to top, pressing the inner mounting edge 322 tightly against the lower part of the upper end 111. Preferably, the inner mounting edge 322 is horizontally arranged, which is beneficial for the stamping and forming of the inner bend 32 and for the inner mounting edge 322 to be subjected to vertical clamping force after assembly and fixing, which is beneficial for the firmness after fixing.

[0066] The motor housing 11 has an annular upper end portion 111, with an inner flange 322 located between the upper end portion 111 and the mounting ring 60. The sealing and fixing between the inner flange 322 and the upper end portion 111 mainly relies on the clamping force between the inner flange 322 and the upper end portion 111. The mounting ring 60 is fixed to the outer cylinder 112 by rotational engagement. The axial dimension of the first inner baffle 61 gradually increases in the direction of rotational engagement of the mounting ring 60. Specifically, the upper end face of the first inner baffle 61 is flush with the upper end face of the mounting ring 60, and the lower end face of the first inner baffle 61 is inclined downward in the direction of rotational engagement of the mounting ring 60. During the rotation of the mounting ring 60, the mounting ring 60 gradually presses the inner flange 322 upward, increasing the pressure between the inner flange 322 and the upper end portion 111, which helps to increase the sealing performance.

[0067] To ensure the assembly and fixing ring 60 is properly positioned and prevent loosening, a positioning protrusion 114 is provided on the first outer retaining rib 113, and a positioning groove 62 matching the positioning protrusion 114 is provided on the first inner retaining rib 61. After the assembly and fixing ring 60 is rotated into position, the positioning protrusion 114 is located within the positioning groove 62, preventing loosening of the assembly and fixing ring 60 after it is properly positioned, and also preventing further rotation of the assembly and fixing ring 60 after it is rotated into position, which could damage the first outer retaining rib 113 and the first inner retaining rib 61. A stop rib 115 is provided on the outer cylinder 112, extending upward along one end of the first outer baffle 113. After the assembly and fixing ring 60 is rotated into position, the stop rib 115 stops the first inner baffle 61 in the rotational installation direction, preventing further movement of the first inner baffle 61 in the installation direction, thus ensuring the assembly and fixing ring 60 is properly positioned. Preferably, the positioning protrusion 114 is located at the rear of the first inner baffle 61 in the rotational installation direction. When the first inner baffle 61 and the first outer baffle 113 begin to engage, the front of the first inner baffle 61 in the rotational installation direction engages with the first outer baffle 113. Afterwards, by rotating the assembly fixing ring 60, the contact area between the first inner baffle 61 and the first outer baffle 113 increases. Finally, when the assembly is about to be completed, the positioning protrusion 114 rotates to engage with the first outer baffle 113. This facilitates the rotational engagement of the assembly fixing ring 60 and reduces the impact of the positioning protrusion 114 on the rotational installation.

[0068] See Figures 2-4 As shown, the inner side of the heating plate 30 is sealed and fixed to the motor housing 11, and the outer side of the heating plate 30 is sealed and fixed to the bottom wall 90 of the inner liner. A mounting hole 91 matching the outer side of the heating plate 30 is provided on the bottom wall 90, and the outer bend 33 is sealed and fixed to the mounting hole 91. The motor housing 11 has an annular upper end 111, the outer side of which is flush with the inner side of the heating body 31, facilitating the smooth flow of water radially inward from the heating body 31 to the upper end 111. Preferably, the upper end 111 is configured with a lower outer side and a higher inner side, or is horizontal, maintaining the water flow in the radial return direction or flowing horizontally inward. Preferably, the angle between the upper end 111 and the horizontal plane is smaller than the angle between the heating body 31 and the horizontal plane, facilitating the radial inward return of water after reaching the upper end 111. The heating plate 30 and the upper end 111 of the motor housing 11 are components of the bottom wall 90.

[0069] See Figure 4 and Figure 11As shown, for fixing the outer curved portion 33 to the mounting hole 91, the outer curved portion 33 has an extension portion 331 extending downward along the outer side of the heating body 31, and an outer mounting edge 332 extending outward along the lower end of the extension portion 331. The heating body 31 extends into the mounting hole 91. The assembly fixing structure also includes an assembly bracket 70 for fixing the heating plate 30 to the mounting hole 91. The assembly bracket 70 is fixed at the mounting hole 91. By setting the assembly bracket 70, the outer side of the heating plate 30 is fixed. By rotating the assembly bracket 70, the assembly bracket 70 is engaged and fixed on the mounting hole 91, which facilitates the assembly operation.

[0070] A second circumferential engaging structure is provided at the mounting bracket 70 and the mounting hole 91. The mounting bracket 70 applies an upward clamping force to the outwardly curved portion 33. The second circumferential engaging structure includes multiple downwardly extending fixing claws 92 on the bottom wall of the mounting hole 91 and multiple outwardly extending second outer baffles 71 on the mounting bracket 70. The second outer baffles 71 engage with the fixing claws 92. The fixing claw 92 has a downwardly extending support portion 921 and a baffle portion 922 that bends inwardly along the lower end of the support portion 921. The second outer baffles 71 are located above the baffle portion 922. The heating plate 30 is supported by the mounting bracket 70 and moves upward. By rotating the mounting bracket 70, the second outer baffles 71 engage with the fixing claws 92. The multiple fixing claws 92 and the second outer baffles 71 are circumferentially arranged. Preferably, the number of fixing claws 92 and the number of second outer baffles 71 are the same. The assembly bracket 71 is fixed to the assembly hole 91 by rotation and engagement. The distance between two adjacent second outer baffles 71 is greater than the circumferential dimension of the fixing claw 91, and the distance between two adjacent fixing claws 92 is greater than the circumferential dimension of the second outer baffles 71. That is, when the assembly bracket 70 moves upward, the second outer baffles 71 can pass between the two adjacent fixing claws 92. The gap between the two adjacent second outer baffles 71 can also avoid the fixing claws 92, or in other words, the fixing claws 92 can move downward relative to each other between the two adjacent second outer baffles 71. Then, the assembly bracket 70 is rotated so that the second outer baffles 71 are located on the upper side of the baffle portion 922 of the fixing claw 92, thus completing the fixation between the outer curved portion 33 and the assembly hole 91.

[0071] See Figure 4 , Figures 12-13As shown, in order to ensure the sealing between the inner bend 32 and the motor housing 11, an annular first sealing gasket 50 is provided between the inner bend 32 and the upper end 111 of the motor housing 11. The first sealing gasket 50 has an annular groove-shaped sealing body 51 with a radial opening. The inner edge 322 is located inside the sealing body 51, or in other words, the sealing body 51 covers the outside of the inner edge 322. By setting the inner edge 322 to be located inside the sealing body 51, sealing components are provided above and below the inner edge 322, which helps to increase the sealing effect. Specifically, the sealing body 51 has an upper sealing portion 511 located above the inner edge 322, a lower sealing portion 512 located below the inner edge 322, and a connecting portion 513 connecting the upper sealing portion 511 and the lower sealing portion 512. The lower sealing portion 512 is located between the inner edge 322 and the upper end portion 111 of the motor housing 11, and between the inner edge 322 and the mounting fixing ring 60. The upper sealing portion 511 and the lower sealing portion 512 are arranged in parallel, and the sealing body 51 has two parallel sealing layers, located above and below the inner edge 322 respectively, which helps to increase the sealing performance. The upper sealing portion 511 is provided with at least one upwardly protruding first annular sealing rib 513. Preferably, the upper sealing portion 511 is provided with two spaced-apart first annular sealing ribs 513 to increase the sealing performance. The lower sealing portion 512 is provided with at least one downwardly protruding second annular sealing rib 514 to increase the sealing performance. The first sealing gasket 50 also has a sealing extension 52 extending outward and upward along the outer side of the sealing upper side portion 511. The sealing extension 52 is located between the inner extension portion 321 and the motor housing 11, filling the gap between the inner extension portion 321 and the motor housing 11, preventing residual water from remaining in the gap, and playing a sealing role.

[0072] See Figures 14-21 The dishwasher with the above-described assembly and fixing structure includes: a motor 10, a washing pump 20, and a heating plate 30. The motor 10 has a motor housing 11, a stator fixed on the motor housing 11, a rotatable rotor, and a rotating shaft 12 fixed on the rotor. The motor housing 11 and the rotating shaft 12 are coaxially arranged, and the rotating shaft 12 is vertically arranged. The washing pump 20 has a washing impeller 21 fixed on the upper end of the rotating shaft 12, a washing pump bracket 22 fixed on the motor housing 11, and a washing pump chamber 23. The lower end of the washing impeller 21 is located in the washing pump chamber 23. The washing impeller 21 is fixed on the upper end of the rotating shaft 12, and a drain impeller is fixed on the lower end of the rotating shaft 12.

[0073] Washing water flows through the heating body 31. By setting the heating plate 30 on the outside of the motor housing 11, the heating plate 30 is made into a component of the washing water circuit, which helps to simplify the structure and avoids obstruction of water flow caused by setting it inside the water circuit. During the dishwasher washing process, the motor 10 starts, causing the rotating shaft 12 to drive the washing impeller 31 to rotate. This causes the washing water in the washing pump chamber 23 to be pumped into the washing chamber 100 by the washing impeller 21. Since the heating plate 30 is annularly sleeved on the outside of the motor housing 11, the washing water entering the washing pump chamber 23 must flow over the upper surface of the heating body 31. This ensures that all the washing water reaching the washing pump chamber 23 is heated, which helps to improve heating efficiency. Furthermore, the heating body 31 is designed with an inner high and an outer low configuration. When the washing water flows radially inward from the outside of the heating body 31, it needs to climb an upward slope, which increases the difficulty of the washing water recirculation. This results in a slower water flow speed when passing through the heating body 31, increasing the time it takes for the water to flow through the heating body 31. This helps to improve the heating efficiency of the heating plate 30 for the washing water, and the washing water will not remain at the heating body 31.

[0074] See Figures 14-17 As shown in the attached drawings, only the base portion of the inner tank is shown. An isolation filter structure 40 is provided on the bottom wall 90 of the inner tank, which is also the bottom wall of the base. The isolation filter structure 40 is annular. The inner diameter side of the isolation filter structure 40 is mounted on the washing pump bracket 22. The space above the isolation filter structure 40 in the inner tank is the washing chamber 100. The space between the isolation filter structure 40 and the heating plate 30 is the heating chamber 200. The space between the isolation filter structure 40 and the bottom wall 90 is the filter chamber 300. Both the filter chamber 300 and the heating chamber 200 are annular cavities.

[0075] See Figure 16 , Figures 12-13The diagram illustrates the structure of the isolation filter structure 40. The isolation filter structure 40 includes an annular planar filter screen 41 and an annular isolation plate 42 located inside the planar filter screen 41. An inwardly extending inner extension 43 is provided along the inner side of the isolation plate 42 and is mounted on the wash pump bracket 22 of the wash pump 20. The wash chamber 100, filter chamber 300, heating chamber 200, and wash pump chamber 23 form a wash water path. The wash pump 20 is used to transport wash water from the wash pump chamber 23 to the wash chamber 100. The heating chamber 200 surrounds the outside of the wash pump chamber 23 and is circumferentially connected to the wash pump chamber 23, used to heat the flowing wash water. The filter chamber 300 surrounds the outside of the heating chamber 200 and is circumferentially connected to the heating chamber 200. Both the filter chamber 300 and the heating chamber 200 are annular cavities. By setting up a combined heating chamber 200 and a filter chamber 300, which are circumferentially connected, it facilitates the return flow of washing water sprayed from the washing pump chamber 23 to the washing chamber 100 during the washing process. The returned washing water passes through the heating chamber and reaches the washing pump chamber 23, thus increasing heating efficiency. During the dishwasher washing process, the rotation of the washing impeller 21 pumps the washing water in the washing pump chamber 23 into the washing chamber 100. The washing water then flows into the filter chamber 300. Under the action of the washing pump 20, the washing water in the filter chamber 300 flows circumferentially from the inner diameter side of the filter chamber 300 to the outer diameter side of the heating chamber 200, and then flows circumferentially from the inner diameter side of the heating chamber 200 back to the washing pump chamber 23, forming a washing water path. The circular return water path from the filter chamber 300 to the washing pump chamber 23 ensures that the washing water entering the washing pump chamber 23 must pass through the heating chamber 200, thus heating all the washing water reaching the washing pump chamber 23 and improving heating efficiency.

[0076] Between the filter chamber 300 and the washing chamber 100 is a flat filter screen 41 for filtering washing water. The filter chamber 300 is located below the washing chamber 100, which facilitates the flow of washing water in the washing chamber 100 into the filter chamber 300 under the action of gravity. Between the heating chamber 200 and the washing chamber 100 is a partition plate 42, which isolates the heating chamber 200 and the washing chamber 100 vertically. The heating chamber is located below the washing chamber 100, so that the washing water in the washing chamber 100 cannot flow directly into the heating chamber 200. The washing water in the washing chamber 100 flows into the filter chamber 300, and the washing water in the filter chamber 300 flows into the heating chamber 200 from the circumference. This ensures that the washing water returning from the washing chamber 100 is filtered before reaching the filter chamber 300, and also ensures that the returning washing water passes through the heating chamber 200.

[0077] The planar filter screen 41 is horizontally arranged, and the isolation plate 42 is arranged with a lower outer edge and a higher inner edge. Since the water flow from the filter chamber 300 through the heating chamber 200 to the washing pump chamber 23 is a ring-shaped return water path, that is, the water flows from the circumference outwards to the inwards. The circumferential dimension in the flow direction becomes smaller and smaller. Because the isolation plate 42 is arranged with a lower outer edge and a higher inner edge, the height of the isolation plate 42 increases in the direction near the center, that is, the height of the isolation plate 42 increases in the radial inward direction. This helps to ensure that the volume change of the heating chamber 200 in the radial direction is not large, which is conducive to the smooth flow of water. At the same time, because the isolation plate 42 is arranged with a lower outer edge and a higher inner edge, the washing water sprayed into the washing chamber 100 and falling onto the isolation plate 42 can flow quickly along the inclined surface to the planar filter screen 41, which is conducive to the return of the washing water in the washing chamber 100 to the filter chamber 300. Furthermore, the isolation plate 42 is arranged with a lower outer edge and a higher inner edge, which helps to increase the structural strength of the isolation plate 42.

[0078] Since both the isolation plate 42 and the heating body 31 are inclined with the inner side higher than the outer side, preferably, the angle between the isolation plate 42 and the horizontal plane is greater than the angle between the heating body 31 and the horizontal plane. This increases the distance between the heating body 31 and the isolation plate 42 in the radially inward direction, which means that the height of the heating cavity 200 increases in the radially inward direction, which is beneficial to the smooth flow of water. Preferably, the angle between the isolation plate 4 and the horizontal plane is 10° to 25°, and more preferably, the angle between the isolation plate 4 and the horizontal plane is 15° to 20°.

[0079] See Figures 18-19As shown, the bottom inner side of the filter chamber 300 is provided with an upwardly and inwardly extending inclined transition portion 93 and a connecting portion 94 extending inwardly along the inclined transition portion 93. The inner side of the connecting portion 94 is a mounting hole 91, and the outer side of the heating plate 30 is sealed and fixed to the connecting portion 94. By setting the inclined transition portion 93, the heating chamber 200 is higher than the filter chamber 300. That is, the water flow from the inner diameter side of the filter chamber 300 needs to flow upward through the inclined transition portion 93 before reaching the filter chamber 300. In other words, the washing water in the filter chamber 300 will only flow into the heating chamber 200 when the washing pump 20 is running. In order to facilitate the simultaneous radial flow of the washing water in the filter chamber 300 towards the heating chamber 200 in the circumferential direction, multiple circumferentially spaced connecting channels are provided between the filter chamber 300 and the heating chamber 200. The washing water in the filter chamber 300 flows into the heating chamber 200 along the multiple connecting channels, which is beneficial to the radial flow of water. Specifically, multiple upwardly extending spacer ribs 95 are provided on the inclined transition portion 93 and the connecting portion 94. The spacer ribs 95 are arranged radially and circumferentially spaced. The spacer ribs 95 are used to form a connecting flow channel, which is formed by two adjacent spacer ribs 95, the top isolation plate, and the lower inclined transition portion 93 and connecting portion 94. The outer side of the spacer ribs 95 extends towards the washing chamber 300 to form an extended guide portion 951, which is used to guide the water flow from the filter chamber 300 to the connecting flow channel. The upper end face of the spacer rib 95 has the same inclination angle as the isolation plate 42, and the spacer rib 95 is used to support the isolation plate 42.

[0080] A water outlet is provided on the bottom surface of the washing chamber 300, and a cup-shaped filter screen 80 is installed at the water outlet. The water outlet is connected to the drain pump chamber 19. A water flow channel 301 connected to the water outlet is provided on the bottom surface of the washing chamber 300. The depth of the water flow channel 301 gradually increases in the direction close to the water outlet. This is beneficial for the washing water in the water flow channel 301 to flow towards the water outlet when draining, so as to avoid the washing water remaining in the washing chamber 300.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A structure for assembling and fixing a heating plate of a dishwasher, characterized in that, The application relates to a fixing structure of a heating disc and a motor shell of a dishwasher. The application relates to a fixing structure of a heating disc and a motor shell of a dishwasher. The heating disc has a heating body with a low outer side and a high inner side, and an inner bending part which is folded and extends downwards and inwards along the inner side of the heating body; the inner bending part has an inner extending part which extends downwards along the inner side of the heating body, and an inner blocking part which is folded and extends inwards along the lower end of the inner extending part; the motor shell has an annular upper end part, and the inner blocking part is located between the upper end part and the fixing ring; a first annular sealing gasket is arranged between the inner bending part and the upper end part of the motor shell, and the first annular sealing gasket has a ring groove-shaped sealing body and a sealing extending part which is located between the inner extending part and the motor shell and fills the gap between the inner extending part and the motor shell; and the inner blocking part is located in the sealing body. An outer cylinder which extends downwards is arranged on the motor shell, the fixing ring is sleeved on the outer side of the outer cylinder, and a first circumferential clamping structure which can be clamped and rotated is arranged between the outer cylinder and the fixing ring. The first circumferential clamping structure comprises a plurality of first outer blocking plates which are arranged at intervals in the circumferential direction of the outer cylinder, and a plurality of first inner blocking plates which are arranged at intervals on the fixing ring; after the fixing ring is clamped and fixed, the first inner blocking plates are located above the first outer blocking plates.

2. The assembly fixture of claim 1, wherein The distance between two adjacent first outer blocking plates is greater than the circumferential dimension of the first inner blocking plates, and the distance between two adjacent first inner blocking plates is greater than the circumferential dimension of the first outer blocking plates.

3. The assembly fixture of claim 2, wherein The axial dimension of the first inner blocking plates gradually increases in the direction in which the fixing ring is clamped and rotated.

4. The assembly fixture of claim 3, wherein The upper end surface of the first inner blocking plates is flush with the upper end surface of the fixing ring, and the lower end surface of the first inner blocking plates is arranged in a downward inclined manner in the direction in which the fixing ring is clamped and rotated.

5. The assembly fixture of claim 3, wherein A positioning convex is arranged on the first outer blocking plate, and a positioning groove which matches the positioning convex is arranged on the first inner blocking plate; after the fixing ring is rotated into position, the positioning convex is located in the positioning groove.

6. The assembly fixture of claim 3, wherein The fixing structure further comprises a fixing bracket which is used for fixing the heating disc and the fixing hole, the fixing bracket is clamped and fixed at the fixing hole in a rotating manner, and a second circumferential clamping structure is arranged at the fixing bracket and the fixing hole.

7. The assembly fixture of any one of claims 3 to 6, wherein, The second circumferential clamping structure comprises a plurality of fixing claws which extend downwards on the bottom wall of the fixing hole, and a second outer blocking rib which extends outwards on the fixing bracket and is clamped with the fixing claws; the fixing claws have a supporting part which extends downwards and a blocking claw part which is folded and extends inwards along the lower end of the supporting part, and the second outer blocking rib is located above the blocking claw part.

8. The assembly fixture of any one of claims 1 to 6, wherein, The fixing structure has the fixing structure of the heating disc and the motor shell according to any one of claims 1 to 9.

9. The assembly fixture of claim 8, wherein ​ 10. A dishwasher, characterized in that ​

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